From fuzzyman at gmail.com  Tue Feb  7 11:43:38 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 7 Feb 2006 08:43:38 -0800
Subject: Detecting line endings
In-Reply-To: <1hadpni.1ne1raq17jjbyaN%aleaxit@yahoo.com>
References: <1139236514.022464.319970@g14g2000cwa.googlegroups.com>
	<1hacujo.1p81efw1ej38ioN%aleaxit@yahoo.com>
	<1139304588.446722.255240@o13g2000cwo.googlegroups.com>
	<1hadpni.1ne1raq17jjbyaN%aleaxit@yahoo.com>
Message-ID: <1139330618.241072.31770@g43g2000cwa.googlegroups.com>


Alex Martelli wrote:
> Fuzzyman <fuzzyman at gmail.com> wrote:
>    ...
> > > Open the file with 'rU' mode, and check the file object's newline
> > > attribute.
> >
> > Do you know if this works for multi-byte encodings ? Do files have
>
> You mean when you open them with the codecs module?
>

No, if I open a UTF16 encoded file in universal mode - will it still
have the correct lineending attribute ?

I can't open with a codec unless an encoding is explicitly supplied.  I
still want to detect UTF16 even if the encoding isn't specified.

As I said, I ought to test this... Without metadata I wonder how Python
determines it ?

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml

> > metadata associated with them showing the line-ending in use ?
>
> Not in the filesystems I'm familiar with (they did use to, in
> filesystems used on VMS and other ancient OSs, but that was a very long
> time ago).
> 
> 
> Alex



From hancock at anansispaceworks.com  Fri Feb 10 08:39:57 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Fri, 10 Feb 2006 07:39:57 -0600
Subject: apostrophe or double quote?
In-Reply-To: <0hu*B7S+q@news.chiark.greenend.org.uk>
References: <1139370460.360400.232500@z14g2000cwz.googlegroups.com>
	<1139413150.237052.47320@o13g2000cwo.googlegroups.com>
	<17386.12524.935119.641171@montanaro.dyndns.org>
	<mailman.1635.1139441911.27775.python-list@python.org>
	<0hu*B7S+q@news.chiark.greenend.org.uk>
Message-ID: <20060210073957.4cfaa674@samwise.anansi>

On 09 Feb 2006 12:54:04 +0000 (GMT)
Sion Arrowsmith <siona at chiark.greenend.org.uk> wrote:
> Terry Hancock  <hancock at anansispaceworks.com> wrote:
> >skip at pobox.com wrote:
> >> Just to present a complete picture, not mentioned in
> >this > thread are triple-quoted strings:
> >> [ ... ]
> >Also in the mode of beating a dead horse ... ;-)
> >
> >Some people prefer to use single quotes for 'labels'
> >(i.e. a name which is meaningful to the program, but not
> >to the user), and reserve either double-quotes or
> >triple-double-quotes for text to be shown to the user.
> > [ ... ]
> 
> Hmm, I made both these points a couple of posts upthread,
> but it didn't appear to get through the news->mail
> gateway.

Ah well, it all came up on the list about a month or two ago
anyway (I guess. I don't know, maybe it was a year ago), so
I'm just repeating it.

 -- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From cfbolz at gmx.de  Wed Feb 22 05:04:49 2006
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Wed, 22 Feb 2006 11:04:49 +0100
Subject: May i customize basic operator (such as 1==3)?
In-Reply-To: <BAY108-F85E0B9B4C44B7CAA16D68CDFD0@phx.gbl>
References: <dtgpbb$asm$2@sea.gmane.org>
	<BAY108-F85E0B9B4C44B7CAA16D68CDFD0@phx.gbl>
Message-ID: <dthd01$7t8$1@sea.gmane.org>

kanchy kang wrote:
> many people write test cases with python scripts.
> in these test scripts, there are many validation statements,
> for example, in unittest, failUnless(a == b),(a/b may be stringType or 
> intType...)
> 
> during running test scripts, if there is one exception raised from 
> failUnless, i still do not know a =?, b= ?... i have to add one statment 
> "print a" or "print b" again...
> 
> as i know, there are many validation statements if using python as one 
> test tool...
> i think my suggestion or requirement may benefit users greatly...
> 

you could use the py.test testing framework 
(http://codespeak.net/py/current/doc/test.html), which tries to print 
useful information if a test fails. So if your test contains

assert a == b

and this is False, it will print the values of a and b. For example the test

def test_fail():
     a = 1
     b = 2
     assert a == b

would result in the following failure:


     def test_fail():
         a = 1
         b = 2
E       assert a == b
 >       assert 1 == 2


This has the drawback that your expressions need to be side-effect free 
(because they will be re-evaluated) but it is quite useful.

Cheers,

Carl Friedrich Bolz



From public at priatel.co.uk  Fri Feb  3 09:20:43 2006
From: public at priatel.co.uk (Martin Biddiscombe)
Date: 3 Feb 2006 06:20:43 -0800
Subject: Regular expression query
Message-ID: <1138976443.473320.315170@g44g2000cwa.googlegroups.com>

It's probably quite simple, but what I want is a regular expression to
parse strings of the form:

"parameter=12ab"
"parameter=12ab foo bar"
"parameter='12ab'"
"parameter='12ab' biz boz"
"parameter="12ab""
"parameter="12ab" junk"

in each case returning 12ab as a match. "parameter" is known and fixed.
The parameter value may or may not be enclosed in single or double
quotes, and may or may not be the last thing on the line. If the value
is quoted, it may contain spaces.

I've tried a regex of the form:
re.compile(r'parameter=(["\']?(.*?)\1( *|$)')

This works fine when the parameter's value is quoted, but if the quotes
are missing, it falls over since the \1 is empty and so the non-greedy
"match anything" ends up matching nothing.

Any suggestions?

Thanks

<M>



From sybrenUSE at YOURthirdtower.com.imagination  Thu Feb  2 04:34:51 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Thu, 2 Feb 2006 10:34:51 +0100
Subject: redirect and python
References: <1138865526.286565.282150@g14g2000cwa.googlegroups.com>
Message-ID: <slrndu3khs.9oi.sybrenUSE@schuimige.unrealtower.org>

questions? enlightened us with:
> The things put to screen doesn't redirect to the file I want.

What do you see on screen? What do you want to redirect to the file?

> What's the trick in here?

Giving us useful information.

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From rainbow.cougar at gmail.com  Tue Feb 14 09:44:02 2006
From: rainbow.cougar at gmail.com (rainbow.cougar at gmail.com)
Date: 14 Feb 2006 06:44:02 -0800
Subject: Python 3000 deat !? Is true division ever coming ?
References: <1139810036.943598.229030@g47g2000cwa.googlegroups.com>
Message-ID: <1139928242.726349.221080@g44g2000cwa.googlegroups.com>

seb.haase at gmail.com wrote:
> Hi,
> Is it true that that "Python 3000" is dead ?
> Honestly I think that e.g. changing 5/2  to be 2.5 (instead of 2) would
> just break to much code :-(
> On the otherhand I'm using Python as "Matlab replacement" and would
> generally like 5/2 ==2.5
>
>...

It's Comp. Sci. 101, based on third grade artithmetic,  not Python.
5/2=2 is integer division, that's the way integer arithmetic works.
5./2.=2.5 is floating point math, with all the round off errors that
incorporates.

If Matlab assumes floating point, then that's what you're paying the
big bucks for.

Curtis



From jack at performancedrivers.com  Tue Feb 14 20:51:53 2006
From: jack at performancedrivers.com (Jack Diederich)
Date: Tue, 14 Feb 2006 20:51:53 -0500
Subject: Soduku
In-Reply-To: <1139967167.960780.171360@o13g2000cwo.googlegroups.com>
References: <1139967167.960780.171360@o13g2000cwo.googlegroups.com>
Message-ID: <20060215015153.GH6479@performancedrivers.com>

On Tue, Feb 14, 2006 at 05:32:48PM -0800, Jonathan Gardner wrote:
> Here at my job, Python gets no respect.
> 
> A programmer here wanted to see which language among Python, Perl, and
> Java was better. So he wrote a Python, perl, and Java version. Except
> the Python version was 20x slower than the perl and Java versions.
> 
> Well, luckily he asked around in our little Python group about what he
> did wrong. He simply misindented a block of code, making it run 10x as
> often as it needed to. With that one fix, it was running faster than
> the Java and perl versions, about 2x as fast. A few other minor tweaks
> made it run even faster.
> 
> And we've been playing with different algorithms for soduku solutions.
> I had it down to 27 ms to solve the puzzle.
> 
A nice story to hear, did you measure how long each of the solutions
took you to write (even if it was just a wrote translation of the same
strategy)?

Is my math off or does 27ms mean 0.027 seconds? On my laptop (1.3GHz) 
an empty python program takes 10ms to run (0.010 secs).  I ask out of
vanity, my own solver takes .15 seconds to run (20 seconds for a 16x16 grid).

-jackdied



From Gr.Dada at lycos.de  Mon Feb 13 14:38:09 2006
From: Gr.Dada at lycos.de (Dada)
Date: 13 Feb 2006 11:38:09 -0800
Subject: winfo_exists
Message-ID: <1139859489.328195.122830@g44g2000cwa.googlegroups.com>

I want to know, whether a window is already open or not. Following a
peace of the code.
-----
...
class Auswahlmenue:
	def __init__(AM):

		AM.Fenster = Toplevel()
	...
	AM.Fenster.destroy(); Startsortierung()
#-------------------------
class Startsortierung:
	def __init__(SS):
		#-------------------------
		def Abbruch(xxx):
			SS.Fenster_2.destroy()
#!! Abfragen, ob bereits ein Auswahlmen? ge?ffnet ist!
			if not Auswahlmenue.Fenster.winfo_exists():
				Auswahlmenue()
		#-------------------------
		def Auswahl(xxx):
			Auswahlmenue()
		#-------------------------
		def weiter(xxx):
			SS.Fenster_2.destroy()
		#-------------------------
		SS.Fenster_2 = Toplevel()
		Label(SS.Fenster_2, text= u'... ...').pack()
		SF = Button(SS.Fenster_2, text= u'abbrechen', underline= 0)
		SF.pack(side= u'left')
		SS.Fenster_2.bind(sequence= '<KeyPress-a>', func= Abbruch)
		SF = Button(SS.Fenster_2, text= u'Auswahlmen?', underline= 0)
		SF.pack(side= u'left')
		SS.Fenster_2.bind(sequence= '<KeyPress-A>', func= Auswahl)
		SF = Button(SS.Fenster_2, text= u'weiter', underline= 0)
		SF.pack(side= u'right')
		SS.Fenster_2.bind(sequence= '<KeyPress-w>', func= weiter)
		TkFenster.wait_window(SS.Fenster_2)
----
The main programm calls the class Auswahlmenue. In this class the user
can choose Startsortierung. In this class the user may (after a
prozess) go back to Auswahlmenue without destroying the
Startsortierung-window (SS.Fenster_2), because he needs the information
shown there. Or he may go back immeaditely  to Auswahlmenue via Abbruch
(destroying SS.Fenster_2 and opening AM.Fenster). In the first way the
user later will close the SS.Fenster_2-window - but how do I get the
information, the AM.Fenster is already open or not? I do not want have
two AM.Fenster open.
I hoped toget this via winfo_exists, but there?s a mistake in the
if-row.
Indeed I could do it with a global flag, but is there a possibility to
do it with winfo_exists()?

Thanks for help
Dada



From kent at kentsjohnson.com  Mon Feb 13 15:51:29 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Mon, 13 Feb 2006 15:51:29 -0500
Subject: Jython inherit from Java class
In-Reply-To: <1139858468.679378.103640@g43g2000cwa.googlegroups.com>
References: <1139344211.725580.263660@g47g2000cwa.googlegroups.com>
	<43eab05b_2@newspeer2.tds.net>
	<1139594138.216488.12730@g14g2000cwa.googlegroups.com>
	<43ede2b8$1_1@newspeer2.tds.net>
	<1139858468.679378.103640@g43g2000cwa.googlegroups.com>
Message-ID: <43f0ecfc$1_2@newspeer2.tds.net>

Mark Fink wrote:
> Hi Kent,
> many thanks for your help! In the meantime I received my "Jython
> Essentials" book and hope that I have much fewer questions in the near
> future.
> One last question for this thread. I tried to inherit from a Java class
> and override on method. I figured that this approach was nonsense
> because the method used private attributes of the Java class. Now I
> read that there is injection used in Jython. Jython uses setter and
> getter methods to do the injection, right? Unfortunately the Java class
> has no setters and getters for the private members. Is there another
> way to override the method besides rewriting the Java class or is this
> approach really doomed?

I don't know what you mean by injection in this context. But Jython has 
a property "python.security.respectJavaAccessibility" which may help - 
if you set it to false (on the command line or the Jython registry (see 
the docs)) then Jython code can access private members of Java objects.

It seems a bit of a hack but it might help you out. Changing the Java 
class to make the private members be protected seems like a better fix 
if you can do it.

Kent


From wegwerp at gmail.com  Wed Feb 15 05:03:56 2006
From: wegwerp at gmail.com (Bas)
Date: 15 Feb 2006 02:03:56 -0800
Subject: a numarray question
In-Reply-To: <1139995325.462403.126420@z14g2000cwz.googlegroups.com>
References: <1139995325.462403.126420@z14g2000cwz.googlegroups.com>
Message-ID: <1139997836.535385.160000@f14g2000cwb.googlegroups.com>

I believe it is something like

a[a==0] = 5

Note that numarray will eventually be replaced by Scipy/Numpy at some
time, but this wouldn't change the basic stuff.

Cheers,
Bas



From strombrg at dcs.nac.uci.edu  Thu Feb 16 23:12:40 2006
From: strombrg at dcs.nac.uci.edu (Dan Stromberg)
Date: Fri, 17 Feb 2006 04:12:40 GMT
Subject: Databases and python
References: <pan.2006.02.14.08.06.18.754312@dcs.nac.uci.edu>
	<1140075451.474898.106320@g43g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.17.04.15.51.234331@dcs.nac.uci.edu>

On Wed, 15 Feb 2006 23:37:31 -0800, Jonathan Gardner wrote:

> I'm no expert in BDBs, but I have spent a fair amount of time working
> with PostgreSQL and Oracle. It sounds like you need to put some
> optimization into your algorithm and data representation.
> 
> I would do pretty much like you are doing, except I would only have the
> following relations:
> 
> - word to word ID
> - filename to filename ID
> - word ID to filename ID

I think I could ditch the "word ID to word" table, but I think I'll
probably eventually need the "filename ID to filename" table, so when I
pull a list of filename ID's by word I can get back the filenames.

> You're going to want an index on pretty much every column in this
> database. That's because you're going to lookup by any one of these
> columns for the corresponding value.

I do need some pretty heavy indexing.

In fact, so far everything seems to be clicking along pretty well, except
the part that I'm having trouble indexing - the per-word list of
filenames.  And that's because I already have one relation (word
number -> filenames' numbers) that's complicating getting another relation
for the list of filenames (just filename ID to '', but it'd be soooo much
faster if I could nest the relations somehow).

> I said I wasn't an expert in BDBs. But I do have some experience
> building up large databases. In the first stage, you just accumulate the
> data. Then you build the indexes only as you need them. Let's say you
> are scanning your files. You won't need an index on the filename-to-ID
> table. That's because you are just putting data in there. The word-to-ID
> table needs an index on the word, but not ID (you're not looking up by
> ID yet.) And the word ID-to-filename ID table doesn't need any indexes
> yet either. So build up the data without the indexes. Once your scan is
> complete, then build up the indexes you'll need for regular operation.
> You can probably incrementally add data as you go.

Interesting thought!  I think I need to ponder this a bit more.

I think the filename <-> filename number tables are pretty inexpensive,
and the word <-> word number tables seem pretty inexpensive too.  I think
it's primarily the word number to filename numbers table that's messing
up the performance really bad, and that's probably because the list of
filename numbers is growing so large in some cases, and adding a filename
to a word tends to be O(n), n==the number of filenames already on the word.

May I ask: In what representation would you keep this word number to
filename numbers relation stashed away until later, to build your indexes
from more rapidly in a later pass?  Are you thinking to keep them all in
memory, or store them in a flat file somehow?

> As far as filename ID and word IDs go, just use a counter to generate
> the next number. If you use base255 as the number, you're really not
> going to save much space.

That's basically what I'm doing - incrementing a counter for each word,
except I'm converting that counter to base255.  The base255 representation
of that counter brings the following benefits:

1) Converting a set of numbers to a string, without losing number
boundaries, becomes just mapping them to base255, and
string.joinfields'ing them.

2) Converting a string to a set of numbers, again without losing number
boundaries, is just string.splitfields'ing them, and mapping them from
base255 back to a list or set of numbers.

3) The numbers can be arbitrarily large, unlike with a, say, 4 or 8 byte
fixed-length record representation

> And your idea of hundreds of thousands of tables? Very bad. Don't do it.

Sigh.  I was afraid of that. :-S

I'm thinking though...  what if I were to use the current representation
for words that don't appear in that many files, and a table for each word
that has >= 1000 (or whatever threshold) filenames associated with it...?

That should greatly cut down on the number of tables, while still giving
the more efficient representation for the words that need it.

Or not?




From codecraig at gmail.com  Wed Feb 15 08:45:37 2006
From: codecraig at gmail.com (abcd)
Date: 15 Feb 2006 05:45:37 -0800
Subject: Win32_Process.Create -- not starting process
In-Reply-To: <mailman.1908.1139936803.27775.python-list@python.org>
References: <mailman.1908.1139936803.27775.python-list@python.org>
Message-ID: <1140011137.470140.319140@g43g2000cwa.googlegroups.com>

Tim,
   Ok, well I verified that my python script and batch script are
working properly.  In fact, if I double click on the batch script (when
its on Computer B), it starts the python script and the script runs
fine with no problem.
    However when I try to execute the batch script from computer A
using WMI it doesnt start.  I say that because the python script that
gets executed writes a status message to a file, and that does not
occur as well as Python.exe does not show up in the task manager, even
though Win32_Process.Create returns a PID and a 0 for the return code.
So, if I try the same process a second time...it works.  python.exe is
running, status message is written to a file, etc.  Is there some sort
of initialization that needs to be done?

Thanks



From dananrg at yahoo.com  Fri Feb 24 17:02:41 2006
From: dananrg at yahoo.com (dananrg at yahoo.com)
Date: 24 Feb 2006 14:02:41 -0800
Subject: Best python module for Oracle, but portable to other RDBMSes
Message-ID: <1140818561.458171.237850@p10g2000cwp.googlegroups.com>

I'm a little confused about what's out there for database modules at:

  http://python.org/topics/database/modules.html

What I'd like to do is use Python to access an Oracle 9.X database for
exporting a series of tables into one aggregated table as a text file,
for import into a mainframe database. The catch is that I'd like to
write code that wouldn't need to be changed (much) if we switched from
Oracle to some other RDBMS (still need to export out as a text file for
import to the mainframe database.

Looks like I'd probably want to use something that conforms to the
DB-API 2.0. On the module list, I see DCOracle2, but it hasn't been
updated since 2001. Anyone here use this module, and does it work with
both Oracle 9.2 and Oracle 10g? Are there other DB-API 2.0 compliant
modules I should be looking at? What are the advantages and
disadvantages of the ones that can access Oracle 9.2 and Oracle 10g
databases?

Thanks in advance.



From grflanagan at yahoo.co.uk  Fri Feb 24 11:08:43 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 24 Feb 2006 08:08:43 -0800
Subject: a little more help with python server-side scripting
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<dSoLf.1663$No6.38996@news.tufts.edu> <dtmhot$4t4$1@wake.carmen.se>
	<nTELf.1667$No6.38886@news.tufts.edu>
	<43ff1d75$1_1@newspeer2.tds.net>
	<xNFLf.1672$No6.39067@news.tufts.edu>
Message-ID: <1140797323.789782.87250@v46g2000cwv.googlegroups.com>

John Salerno wrote:
> Kent Johnson wrote:
> > John Salerno wrote:
> >> Magnus Lycka wrote:
> >>
> >>> The other option is ASP. You have been given information about
> >>> that already. Be aware that ASP does not imply VBScript. You can
> >>> use Python in ASP as long as that's enabled. It seems to be exactly
> >>> what you are asking for, so I don't understand why you seem to reject
> >>> it. Don't you like the file name endings?
> >>
> >>
> >> Maybe I'm misunderstanding what is meant when you say to use ASP. I'm
> >> thinking that it involves having to learn another language (such as C#
> >> with ASP.NET), instead of writing my code in Python. Is that not the
> >> case?
> >
> > See http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B276494
> >
> > The last example on this page is exactly what you have been asking for.
> >
> > Kent
>
> But isn't this code:
>
> Response.Write('Python Test<br>')
> Response.write('<h3>Smaller heading</hr>')
>
> written using ASP instead of Python?


Here's a demo script called 'tut1.asp' located in
'site-packages\win32comext\axscript\Demos\client\asp':

<HTML>

<SCRIPT Language="Python" RUNAT=Server>

for i in range(3,8):
  Response.Write("<FONT SIZE=%d>Hello World!!<BR>" % i)

</SCRIPT>

</HTML>

###################

and here is 'CreateObject.asp' from the same directory:

<HTML>

<SCRIPT Language="Python" RUNAT=Server>

# Just for the sake of the demo, our Python script engine
# will create a Python.Interpreter COM object, and call that.

# This is completely useless, as the Python Script Engine is
# completely normal Python, and ASP does not impose retrictions, so
# there is nothing the COM object can do that we can not do natively.

o = Server.CreateObject("Python.Interpreter")

Response.Write("Python says 1+1=" + str(o.Eval("1+1")))

</SCRIPT>

</HTML>


Gerard



From bob.python at yahoo.com  Thu Feb 23 15:30:05 2006
From: bob.python at yahoo.com (Bob)
Date: 23 Feb 2006 12:30:05 -0800
Subject: How to move optparse from main to function?
In-Reply-To: <1140724501.360284.227790@i39g2000cwa.googlegroups.com>
References: <1140721179.096585.202560@g14g2000cwa.googlegroups.com>
	<1140724501.360284.227790@i39g2000cwa.googlegroups.com>
Message-ID: <1140726605.085893.256240@z34g2000cwc.googlegroups.com>

Yes the documentation is helpful, but I wouldn't have been able to do
what you did in your code by just looking at section 6.21.2.9. I
thought I could put "parser = parserSetup()" and "(options, args) =
parser.parse_args()" in the function. Thanks for helping out with that!



From kent at kentsjohnson.com  Thu Feb 23 08:09:41 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Thu, 23 Feb 2006 08:09:41 -0500
Subject: why don't many test frameworks support file-output?
In-Reply-To: <mailman.2333.1140677874.27775.python-list@python.org>
References: <mailman.2333.1140677874.27775.python-list@python.org>
Message-ID: <43fdaf8f$1_3@newspeer2.tds.net>

kanchy kang wrote:
> i browsed the following frameworks briefly: nose, OOBTest,
> testosterone,  py.test, Sancho ... and found out they do support 
> imediate screen-output only.

unittest.TextTestRunner() has an optional stream argument that would let 
you output to a file.

Kent


From felipe.lessa at gmail.com  Sun Feb 12 00:35:56 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sun, 12 Feb 2006 03:35:56 -0200
Subject: itertools examples
In-Reply-To: <1139717775.485803.129820@f14g2000cwb.googlegroups.com>
References: <mailman.1768.1139696510.27775.python-list@python.org>
	<1139717775.485803.129820@f14g2000cwb.googlegroups.com>
Message-ID: <1139722556.3978.5.camel@kenshin>

Em S?b, 2006-02-11 ?s 20:16 -0800, Raymond Hettinger escreveu:
> Both work just fine.  It's a personal choice when to use map() and when
> to use a list comprehension.  Since many itertools have the flavor of
> map/filter, its use is not out of place in the itertools docs.

I know both work in the same way, but IIRC I heard someone (GvR?) saying
list comprehensions should be used when possible to substitute map,
filter and/or reduce.

> Also, the use of map() provided an opportunity to demonstrate
> operator.itemgetter().  While not essential to this example, it is
> helpful with several other tools (especially those with a key=
> argument).  Itertools provide a kind of iterator algebra and
> itemgetter() is an essential part of that algebra; hence, it is
> appropriate that it be included in itertool examples.
> 
> If your taste says otherwise, that's okay.  Program however you want.
> If reading the examples helped you understand the toolset, then the
> docs accomplished their goal.

IMO at a first glance the it's much easier to read and understand the
list comprehension, but I have to admit that if I didn't see the
operator.itemgetter(1) there I would probably never known it existed.
Well, so let's just leave it there, but I'll surely program with the
list comprehensions ;-).

Thanks for your attention,
Felipe.

> 
> Raymond
> 
-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From lucaberto at libero.it  Fri Feb 17 10:20:01 2006
From: lucaberto at libero.it (luca72)
Date: 17 Feb 2006 07:20:01 -0800
Subject: Pyserial never read
In-Reply-To: <1140140990.492289.185060@g47g2000cwa.googlegroups.com>
References: <1140105936.408387.88130@z14g2000cwz.googlegroups.com>
	<1140140990.492289.185060@g47g2000cwa.googlegroups.com>
Message-ID: <1140189601.611469.254940@g44g2000cwa.googlegroups.com>

Thanks 

Luca



From steve at holdenweb.com  Tue Feb 28 02:06:13 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 28 Feb 2006 02:06:13 -0500
Subject: newbie
In-Reply-To: <20060227203553.44475.qmail@web25702.mail.ukl.yahoo.com>
References: <20060227203553.44475.qmail@web25702.mail.ukl.yahoo.com>
Message-ID: <du0sp1$vp4$1@sea.gmane.org>

Brain Murphy wrote:
[...]
> also i have heard that there are no crackers using python why is this??
>  
Because the Python Secret Underground seeks hackers out and
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From zunbeltz at gmail.com  Fri Feb 10 11:27:31 2006
From: zunbeltz at gmail.com (zunbeltz at gmail.com)
Date: 10 Feb 2006 08:27:31 -0800
Subject: html entity to unicode
Message-ID: <1139588851.594418.301860@g14g2000cwa.googlegroups.com>

Hi,

I'm parsing html. I have a page with a lot of html enitties for hebrew
characters. When i print what i get are blanks, dots and commas. How
can i decode this entities to unicode charachters?

TIA

Zunbeltz



From aleaxit at yahoo.com  Sun Feb 26 16:42:04 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 26 Feb 2006 13:42:04 -0800
Subject: sort one list using the values from another list
References: <mailman.2447.1140969980.27775.python-list@python.org>
	<Bb-dncKoOeYvQ5zZRVn-uw@comcast.com>
	<1140981038.788111.93500@j33g2000cwa.googlegroups.com>
	<9bpMf.109707$4l5.58949@dukeread05>
Message-ID: <1hbdcma.11xgwfqcbbjjjN%aleaxit@yahoo.com>

Ron Adam <rrr at ronadam.com> wrote:

> bearophileHUGS at lycos.com wrote:
> > Your solution Steven Bethard looks very intelligent, here is a small
> > speed test, because sorting a list according another one is a quite
> > common operation.
> > (Not all solutions are really the same, as Alex has shown).
> 
> Try this one.
> 
> def psort10(s1, s2):
>      d = dict(zip(s2,s1))
>      s1[:] = (d[n] for n in sorted(d.keys()))
>
> It's faster on my system because d.keys() is already sorted.  But that
> may not be the case on other versions of python.

If there are duplicates in s2, this solution will silently lose some
items from s1.  I would at least include an assert len(s2)==len(d) as
the second statement to get some insurance that this doesn't occur.


Alex


From grante at visi.com  Wed Feb 15 11:13:08 2006
From: grante at visi.com (Grant Edwards)
Date: Wed, 15 Feb 2006 16:13:08 -0000
Subject: Best way of finding terminal width/height?
References: <96nFf.43896$d5.199922@newsb.telia.net>
	<11uc3dohfitotc5@corp.supernews.com>
	<jysFf.155352$dP1.513537@newsc.telia.net>
	<11udc0r2bq11042@corp.supernews.com> <43E719EE.3040401@gmail.com>
	<11ueq4nhn91qm91@corp.supernews.com> <43E8659D.6010101@gmail.com>
	<11uhcjj2p10mm0d@corp.supernews.com> <43E8D4DD.7040904@gmail.com>
	<11uhodjciifej02@corp.supernews.com>
	<dscfcv$t5i$1@news.lysator.liu.se>
	<11uk67a4ao5efe6@corp.supernews.com>
	<dset15$hfq$1@news.lysator.liu.se>
	<11umnq61kf9m5f3@corp.supernews.com>
	<dsvd93$8g2$1@news.lysator.liu.se>
Message-ID: <11v6kokrmpgfecc@corp.supernews.com>

On 2006-02-15, Joel Hedlund <joel.hedlund at gmail.com> wrote:
>> Sure.  I was going to do that yesterday, but I realized that I
>> didn't know how/where to do it.  I assume there's a link
>> somewhere at www.python.org, but I haven't had a chance to look
>> yet.
>
> It's already reported to the bug tracker:
>
> http://www.python.org/sf/210599
>
> Apparently, this has been around since 1.5.2. It's in fact
> also in the feature request PEP right now: 
>
> http://www.python.org/peps/pep-0042.html
>
> and it's listed as a "Big" project under the "Standard
> library" heading. I assume we're going to have to live with
> this for a while yet...

Oh.  

I've got no complaints about the way things work, I was just
going to suggest changing the documentation to correctly
describe the way things work. Too mundane a solution?

It seems a bit odd that we've known the documentation is wrong
for 6 years and nobody's bothered to fix it.  Or is the
documentation describing how we wish things would work
regardless of whether they work that way or not?

-- 
Grant Edwards                   grante             Yow!  It's today's SPECIAL!
                                  at               
                               visi.com            


From fuzzyman at gmail.com  Wed Feb 15 03:51:35 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 15 Feb 2006 00:51:35 -0800
Subject: How to *Search* with google from inside my programme and get the
	search result?
In-Reply-To: <mailman.1933.1139969478.27775.python-list@python.org>
References: <mailman.1933.1139969478.27775.python-list@python.org>
Message-ID: <1139993495.896341.3160@g47g2000cwa.googlegroups.com>


Frank Potter wrote:
> I want to search something by a key word from inside my py script.
> The using google idea comes to my mind first because write a search
> programme from scratch is not so easy.
>
> I want to take advantage of goolge results, but I don't know how.
> To extract the result from html of google can get the result, but it's not
> reliable and stable because the html structure my be changed any time.
>
> Does google supply some webservice to programmers? I did see
> some a tool use google to search and use it's result from the programme very
> well. Its name is "Email catcher&sender 2.10", which can be download
> at http://www.worldminer.com/download.htm. Windows users can take a
> look at it. It supports more than google, but yahoo and some other search
> engines. How does it do it? I really need some hints.

If you'd like a (simple) example of using the google webservice, have a
look at googlerank -
htpp://www.voidspace.org.uk/python/recipebook.shtml#google

In practise I've found the yahoo web services faster, simpler and less
restrictive, so you may want to try that.

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml



From rridge at csclub.uwaterloo.ca  Fri Feb 10 23:24:34 2006
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 10 Feb 2006 20:24:34 -0800
Subject: Legality of using Fonts
References: <1139591308.864757.154740@g44g2000cwa.googlegroups.com>
	<pan.2006.02.10.23.30.05.619934@REMOVETHIScyber.com.au>
Message-ID: <1139631874.397548.37840@g47g2000cwa.googlegroups.com>

Steven D'Aprano wrote:
> It is highly unlikely that any judge will be fooled by a mere change in
> format ("but Your Honour, I converted the TTF file into a bitmap").

If that were true, almost the entire X11 bitmap font collection would
be illegal.  Fonts aren't subject copyright, just the hints in most
outline fonts, which are considered computer programs.

                                      Ross Ridge



From orome.the.valar at gmail.com  Thu Feb 16 03:18:08 2006
From: orome.the.valar at gmail.com (Sinan Nalkaya)
Date: Thu, 16 Feb 2006 02:18:08 -0600
Subject: pop line from file
In-Reply-To: <1140037192.930780.218270@g44g2000cwa.googlegroups.com>
References: <mailman.1939.1139998965.27775.python-list@python.org>
	<slrndv69pd.8qf.sybrenUSE@schuimige.unrealtower.org>
	<1140037192.930780.218270@g44g2000cwa.googlegroups.com>
Message-ID: <8c05f79c0602160018y792b068dw856a9213f9145fc0@mail.gmail.com>

i am unix platform, now searching for the mkfifo topics.
thank you all.


From dan.gass at gmail.com  Sun Feb 19 17:15:08 2006
From: dan.gass at gmail.com (dan.gass at gmail.com)
Date: 19 Feb 2006 14:15:08 -0800
Subject: Making mouse wheel work with pmw ScrolledCanvas widget
In-Reply-To: <1140287936.010845.68530@g44g2000cwa.googlegroups.com>
References: <1140287936.010845.68530@g44g2000cwa.googlegroups.com>
Message-ID: <1140387308.397819.267060@f14g2000cwb.googlegroups.com>

This looks like it has nothing to do with Pmw (Mega widgets) but is
really a basic Tkinter problem.



From deets at nospam.web.de  Thu Feb  2 14:31:39 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 02 Feb 2006 20:31:39 +0100
Subject: PyQt: QListView how to retrieve selected items?
In-Reply-To: <1138907537.417067.228570@z14g2000cwz.googlegroups.com>
References: <1138907537.417067.228570@z14g2000cwz.googlegroups.com>
Message-ID: <44f50sF1u9c3U1@uni-berlin.de>

Flavio schrieb:
> Hi,
> 
> I have a QListview widget that allows me to store a bunch of strings in
> it. This strings can be visualized, sorted, selected, etc.
> 
> My Problem is that I cant find a way to get the user selected items
> back from it! I looked over the Qt documentation many times over but
> there is no method to that end.
> 
> Any PyQt guru lurking around?
> 
> should I try some other list widget, that has a "getSelected()"method?
> Is there one?

QListViewItem.isSelected()? You have to loop over the items to get the 
ones selected.

Additionally, you might want to register for the

selectionChanged

signal. In Single-selection-mode there even is a overloaded version that 
directly gives you the selected item.

And all of this can be found within 20 seconds in the great Qt-Docs. 
Especially easy with the included QAssistant, a help-browser with 
indexing and whatever...

Diez


From timr at probo.com  Tue Feb 21 02:32:06 2006
From: timr at probo.com (Tim Roberts)
Date: Tue, 21 Feb 2006 07:32:06 GMT
Subject: Multiplication optimization
References: <1140310118.365847.111120@g14g2000cwa.googlegroups.com>
Message-ID: <haglv1t5uqg673ms2hq6qamnppot31d797@4ax.com>

"Paul McGuire" <ptmcg at austin.rr.com> wrote:
>
>Does Python's run-time do any optimization of multiplication
>operations, like it does for boolean short-cutting?  That is, for a
>product a*b, is there any shortcutting of (potentially expensive)
>multiplication operations as in:

Integer multiplication is a 1-cycle operation in Intel processors.

Even multiple-precision multiplication is very efficient -- probably more
so than multiple comparisons and jumps.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From rridge at csclub.uwaterloo.ca  Wed Feb  8 21:17:19 2006
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 8 Feb 2006 18:17:19 -0800
Subject: Replacing curses
In-Reply-To: <11ul1mgplrah63e@corp.supernews.com>
References: <mailman.1566.1139345769.27775.python-list@python.org>
	<43E9234B.6030108@v.loewis.de>
	<mailman.1588.1139372460.27775.python-list@python.org>
	<11uk55h47lruk18@corp.supernews.com>
	<mailman.1611.1139422272.27775.python-list@python.org>
	<11ukf0ci8d6ac64@corp.supernews.com>
	<mailman.1620.1139429435.27775.python-list@python.org>
	<11ul1mgplrah63e@corp.supernews.com>
Message-ID: <1139451439.115775.223250@g43g2000cwa.googlegroups.com>

Thomas Dickey wrote:
> ...and send UTF-8 text, keeping track of where you really are on the screen.

You make that sound so easy.

                                              Ross Ridge



From l.exsteens at gmail.com  Thu Feb  2 07:39:32 2006
From: l.exsteens at gmail.com (Laurent)
Date: 2 Feb 2006 04:39:32 -0800
Subject: my openGL API need threads!!! But how to ,ake it work???
Message-ID: <1138883972.001578.149350@g44g2000cwa.googlegroups.com>

Hi,

here is the context:

I'm coding a openGL API I will need for a project for my school.
This API is quite simple:

an ooglScene describe all needed to make an openGL, and inherits from a
list. So an ooglScene is fundamentaly a list of ooglObjects (which is
organised as a Composite Pattern).

ooglScene.run() do everthing needed to initialise GL and GLUT, and then
launch the GLUT Main Loop.
(the display function I wrote juste call the display method of each
ooglObject in the ooglScene)

Here is the problem!

Once the GLUT Main Loop is launched, I cannot add other ooglObjects to
my ooglScene, neither modify any existing ooglObject in my scene!

exemple that works but is sequential:
------------------------------------------------------
Scene = ooglScene()
Scene.append(ooglObject())
Scene.run()

What I want to do:
---------------------------
Scene = ooglScene()
Scene.run()
Scene.append(ooglObject())



I don't know the threqding system, I've take a look on that but I don't
know how to make what I need: the ooglScene.run() method must create a
separate thread to launch the glutMainLoop!

Actually I see only one solution: create two threads out of the
ooglScene and launch run() in one, and the rest of my program in the
other:

Thread1.start() --> launch the ooglScene.run()
Thread2.start() --> launch the rest of my program...

THIS IS NOT ENOUGH TRANSPARENT IN MY POINT OF VIEW!!



From grante at visi.com  Sat Feb 11 09:07:29 2006
From: grante at visi.com (Grant Edwards)
Date: Sat, 11 Feb 2006 14:07:29 -0000
Subject: Shortest prime number program
References: <1139652226.869102.310180@g14g2000cwa.googlegroups.com>
	<i_jHf.32$oj5.9305@news.siol.net>
	<1139660566.389036.166090@g14g2000cwa.googlegroups.com>
	<43EDE17F.7030000@v.loewis.de>
	<1139664341.587464.78200@g44g2000cwa.googlegroups.com>
Message-ID: <11urrt1j14vg0af@corp.supernews.com>

On 2006-02-11, swisscheese <jimlewis at miclog.com> wrote:
>>You can save two bytes with
>
> 56 - nice catch.
> 55:
> r=range(2,99)
> [x for x in r if sum(x%d<1 for d in r)<2]

And if this were FORTRAN:

r=range(2,99)
[xforxinrifsum(x%d<1fordinr)<2]

;)

-- 
Grant Edwards                   grante             Yow!  Hmmm... a CRIPPLED
                                  at               ACCOUNTANT with a FALAFEL
                               visi.com            sandwich is HIT by a
                                                   TROLLEY-CAR...


From skip at pobox.com  Tue Feb 21 11:35:40 2006
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 21 Feb 2006 10:35:40 -0600
Subject: Mutable numbers
In-Reply-To: <dtfd79$kqu$1@news.doit.wisc.edu>
References: <dteele$9pi$1@home.itg.ti.com>
	<43fb2462$0$3211$636a55ce@news.free.fr>
	<mailman.2238.1140535034.27775.python-list@python.org>
	<dtfd79$kqu$1@news.doit.wisc.edu>
Message-ID: <17403.16732.239613.309098@montanaro.dyndns.org>

    Rocco> def f():
    Rocco>      a = 12100
    Rocco>      b = 12100
    Rocco>      c = 121*100
    Rocco>      print a is b
    Rocco>      print a is c

That the object with value 12100 is referenced by both a and b is a side
effect of byte code compilation by CPython not an inherent property of
integer objects.  Nor is it an optimization performed by CPython on
integers.  As literals are collected during compilation they are only
inserted into the local constants tuple once.

    >>> def f():
    ...   a = "12,100"
    ...   b = "12,100"
    ...   c = "12," + "100"
    ...   print a is b
    ...   print a is c
    ...
    >>> f()
    True
    False
    >>> print f.func_code.co_consts
    (None, '12,100', '12,', '100')

    >>> def f():
    ...   a = 12100
    ...   b = 12100
    ...   c = 121*100
    ...   print a is b
    ...   print a is c
    ...
    >>> f()
    True
    False
    >>> print f.func_code.co_consts
    (None, 12100, 121, 100)

Skip


From dmbkiwi at gmail.com  Sun Feb 26 03:58:03 2006
From: dmbkiwi at gmail.com (dmbkiwi at gmail.com)
Date: 26 Feb 2006 00:58:03 -0800
Subject: dateutil and dates before today
In-Reply-To: <1140942263.389308.133440@i39g2000cwa.googlegroups.com>
References: <1140942263.389308.133440@i39g2000cwa.googlegroups.com>
Message-ID: <1140944283.111719.263270@i39g2000cwa.googlegroups.com>

I'll answer my own post.

If you don't specify dtstart, it defaults to datetime.today().
Therefore, there are no instances before today.  Specify dtstart as a
historic date, and it works on any dates after dtstart.

Wish I'd engaged brain before posting.

Matt



From fuzzyman at gmail.com  Mon Feb  6 06:16:20 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 6 Feb 2006 03:16:20 -0800
Subject: UTF16, BOM, and Windows Line endings
Message-ID: <1139224580.820529.198120@z14g2000cwz.googlegroups.com>

Hello all,

I'm handling some text files where I don't (necessarily) know the
encoding beforehand. Because I use regular expressions to parse the
text I *must* decode UTF16 encoded text (otherwise the regexes split on
byte boundaries).

I can recognise UTF8 and BOM and remove (but not necessarily decode).
For UTF16 it seems that the Python codec will automatically remove the
BOM. Having detected it (to trigger a decode) is it considered
*invalid* to remove it ? The codec certainly handles the text without a
BOM - I just don't want this part of the code to break later.

Because I don't know the encoding until I've checked for the BOM I have
to read in binary mode. Similarly I have to write in binary mode.

How should I handle line-endings for UTF16 ? Is it possible that other
programs (on windows) will have line endings as u'\r\n' ? When saving
files for that platform should I make the line endings u'\r\n' ? (This
sequence obviously encodes to four bytes in UTF16). I would only do
this to ensure compatibility with other programs the user may use to
create the text files.

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml



From nyamatongwe+thunder at gmail.com  Sun Feb 19 19:42:09 2006
From: nyamatongwe+thunder at gmail.com (Neil Hodgson)
Date: Mon, 20 Feb 2006 00:42:09 GMT
Subject: commenting out blocks of code
In-Reply-To: <1140245659.360215.253640@f14g2000cwb.googlegroups.com>
References: <20060217231846.87613.qmail@web36708.mail.mud.yahoo.com>
	<mailman.2077.1140221554.27775.python-list@python.org>
	<pan.2006.02.18.01.36.05.856023@REMOVETHIScyber.com.au>
	<JiwJf.10683$yK1.3804@news-server.bigpond.net.au>
	<1140245659.360215.253640@f14g2000cwb.googlegroups.com>
Message-ID: <Bf8Kf.11928$yK1.772@news-server.bigpond.net.au>

Atanas Banov:

> here is something you both seems to have not considered: imagine you
> make decision if ^Q has to comment or uncomment based on the 1st line
> and not on each line individually in the block. 

   When first implementing Ctrl+Q, this looked to have similar
advantages and disadvantages to the chosen implementation. However, it
wouldn't allow a technique I've come to use which is to have two
versions of some code or section of a configuration file and to toggle
between the two by selecting the whole range and pressing Ctrl+Q.

> #code1
> ##comment1
> ##comment2
> #code2
> ----------------
> 
> note how ## maintains where comments were. now, for the same selection,
> ^Q again? 1st character is #, so the editor is asked to uncomment,
> dwim:

   The problem with "##" as opposed to "#~" is that "##" is common in
much source code particularly in barrier comments and comment sections:

############ Persistence section ############
## These functions are responsible for load
## and save for the core media database.

   Neil


From grante at visi.com  Sun Feb 12 23:34:26 2006
From: grante at visi.com (Grant Edwards)
Date: Mon, 13 Feb 2006 04:34:26 -0000
Subject: how do you pronounce 'tuple'?
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
Message-ID: <11v032ii4gvik72@corp.supernews.com>

On 2006-02-13, John Salerno <johnjsal at NOSPAMgmail.com> wrote:

> I know it comes from the suffix -tuple, which makes me think
> it's pronounced as 'toople', but I've seen (at m-w.com) that
> the first pronunciation option is 'tuhple', so I wasn't sure.
> Maybe it's both, but which is most prevalent?

In my expereince, the latter.  I don't think I've ever heard
the other pronounciation.

-- 
Grant Edwards                   grante             Yow!  Isn't this my STOP?!
                                  at               
                               visi.com            


From kent at kentsjohnson.com  Thu Feb 23 11:26:09 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Thu, 23 Feb 2006 11:26:09 -0500
Subject: Unexpected timing results
In-Reply-To: <pan.2006.02.23.15.38.11.944281@REMOVETHIScyber.com.au>
References: <pan.2006.02.23.15.38.11.944281@REMOVETHIScyber.com.au>
Message-ID: <43fddd97$1_2@newspeer2.tds.net>

Steven D'Aprano wrote:
> I have two code snippets to time a function object being executed. I
> expected that they should give roughly the same result, but one is more
> than an order of magnitude slower than the other.
> 
> Here are the snippets:
> 
> def timer1():
>     timer = time.time
>     func = lambda : None
>     itr = [None] * 1000000
>     t0 = timer()
>     for _ in itr:
>         func()
>     t1 = timer()
>     return t1 - t0
> 
> def timer2():
>     timer = time.time
>     func = lambda : None
>     itr = [None] * 1000000
>     t = 0.0
>     for _ in itr:
>         t0 = timer()
>         func()
>         t1 = timer()
>         t += t1 - t0
>     return t
> 
> Here are the results:
> 
> 
>>>>timer1()
> 
> 0.54168200492858887
> 
>>>>timer2()
> 
> 6.1631934642791748
> 
> Of course I expect timer2 should take longer to execute in total,
> because it is doing a lot more work. But it seems to me that all that
> extra work should not affect the time measured, which (I imagine) should
> be about the same as timer1. Possibly even less as it isn't timing the
> setup of the for loop.
> 
> Any ideas what is causing the difference? I'm running Python 2.3 under
> Linux.

You are including the cost of one call to timer() in each loop: The cost 
of returning the time from the first call to timer() and the the cost of 
getting the time in the second call. On my computer with Python 2.4:

D:\Projects\CB>python -m timeit -s "import time;timer=time.time" "t=timer()"
1000000 loops, best of 3: 0.498 usec per loop

which is almost exactly the same as the difference between timer1() and 
timer2() on my machine:
timer1 0.30999994278
timer2 0.812000274658

using Python 2.4.2 on Win2k.

Kent


From reply.in.the.newsgroup at my.address.is.invalid  Sun Feb 26 05:35:39 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Sun, 26 Feb 2006 11:35:39 +0100
Subject: ImportError in Unpickle
References: <1140916392.357064.291290@t39g2000cwt.googlegroups.com>
	<8303025o795ogn175pdgoq7k2ahgqotnja@4ax.com>
Message-ID: <731302l1kqegn9nnt3ba73dlormigrhpo4@4ax.com>

Rene Pijlman:
>draghuram at gmail.com:
>>ImportError: No module named __main__
>
>There are some posts in the Usenet archive

Also:
http://mail.python.org/pipermail/python-list/1999-April/000916.html

-- 
Ren? Pijlman


From lycka at carmen.se  Mon Feb 13 13:06:22 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Mon, 13 Feb 2006 19:06:22 +0100
Subject: Rethinking the Python tutorial
In-Reply-To: <mailman.1836.1139846681.27775.python-list@python.org>
References: <dsfqv4$shc$1@wake.carmen.se>	<mailman.1721.1139586567.27775.python-list@python.org>	<dsq3ta$bne$1@wake.carmen.se>
	<mailman.1836.1139846681.27775.python-list@python.org>
Message-ID: <dsqhqu$afl$1@wake.carmen.se>

Steve Holden wrote:
> Magnus Lycka wrote:
> As with all such content, the first thing you will need is a band of 
> volunteers dedicated to keeping the content up to date, both proactively 
> and in response to reader comments.

That's why I suggested these already written tutorials. Both
authors have shown that they can make an effort, and there are
other people who have helped with contributions such as
translations. Hopefully, giving these texts a more official
status will stimulate them further and make more people
interested, but I guess it could also go the other way, if it
isn't handled well.

> What we are talking about here is a Python Language Users' Guide.

Agreed.

> Google are very active supporters of Python already, though they don't 
> make a big song and dance about it. You might notice, for example, that 
> they are a Platinum Sponsor at PyCon this year, as well as being a 
> sponsor member of the PSF. The Summer of Code also benefited Python in 
> several ways.

I didn't notice the PyCon sponsorship. Maybe that's something for
the EuroPython arrangers to think about... After all, EuroPython 2006
will be at CERN, and that's where the whole web thingie started... :)

> There are older-established companies with more Python programmers who 
> have made hardly any community contribution - the "takers" of the open 
> source world. I wouldn't like Google to think that the Python community 
> isn't recognizing their support.

It has improved lately, and I agree that others could chip in as well.

> You might also like to ask Alex what he'd feel about losing the 
> "Nutshell" revenue stream!

Well, I suggested they'd pay him for it. Perhaps a decent sized sack
of money now is as good as that long term stream... It was just a wild
idea though. You know, they don't usually come true, but who knows?
Suggesting it might increase the chances. It would certainly be a
boost for Python to have such excellent documentation on the web. It
would probably make it easier for Google (and you other big corps!)
to find good Python programmers in the future.


From loco_jokers_records at hotmail.com  Fri Feb 10 18:47:14 2006
From: loco_jokers_records at hotmail.com (Gerber)
Date: Sat, 11 Feb 2006 00:47:14 +0100
Subject: cmd
Message-ID: <ec9qu1t7ij7rfpr6m26urjt7smt746m22t@4ax.com>

I'd like some documentation on the cmd module, besides the regular
docs, in help() and docs.python.org...

Gerber


From darkmooninorbit at gmail.com  Thu Feb  2 02:04:05 2006
From: darkmooninorbit at gmail.com (Robert Deskoski)
Date: Thu, 2 Feb 2006 18:04:05 +1100
Subject: popen and stderr
Message-ID: <769bb5f0602012304g4e0cca90t6d39387e0971004a@mail.gmail.com>

Hey all,

Currently i'm trying to use popen3 to access stderr - i wanted to use it to
output some text to the
parent process, so it can display it (non-console, graphically is what I
mean). Is it possible
to write to stderr fromt he child process or, barring this, to attach
another stream to the child
process and use that to send back text. I'd use stdout, but it's already
being used for console
output.

Thanks for any help given,
Rob
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From deets at nospam.web.de  Fri Feb 24 08:36:16 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 24 Feb 2006 14:36:16 +0100
Subject: A C-like if statement
References: <hp-dnY20cusOnGPeRVn-rg@nmt.edu> <dtl04p$5q2$1@reader2.panix.com>
	<sdadnS6nfNnbmmPeRVn-sw@nmt.edu>
	<pan.2006.02.23.22.14.53.56541@REMOVETHIScyber.com.au>
	<1140742149.011750.321530@z34g2000cwc.googlegroups.com>
	<pan.2006.02.24.09.58.32.497698@REMOVETHIScyber.com.au>
	<1140775322.788083.256970@v46g2000cwv.googlegroups.com>
	<pan.2006.02.24.11.07.19.764837@REMOVETHIScyber.com.au>
	<roy-5A1B56.08034924022006@reader2.panix.com>
Message-ID: <468giiF9p3beU1@uni-berlin.de>

Roy Smith wrote:

> In article <pan.2006.02.24.11.07.19.764837 at REMOVETHIScyber.com.au>,
>  Steven D'Aprano <steve at REMOVETHIScyber.com.au> wrote:
> 
>> Side-effects aren't always bad (import, for example, does all its work by
>> side-effect). But they are generally frowned upon, and in functional
>> languages they are verboten.
> 
> How do you do any I/O in a functional language if side effects are
> verboten?  For that matter, how does a functional program ever stop
> running?

Using Monads. Which basically starts carrying around explicit state in an
implicit manner. But that is restricted to very few, specific portions of
the program. 

Diez


From markleeds at verizon.net  Sat Feb 25 18:01:21 2006
From: markleeds at verizon.net (MARK LEEDS)
Date: Sat, 25 Feb 2006 15:01:21 -0800
Subject: looking for a simpe plotting module
Message-ID: <001201c63a5f$65781330$2f01a8c0@m8d4477f3de884>

i'm pretty much a python beginner so can anyone recommend a plooting package in python ( simple foating  numbers 
that makes lines or dots with a yaxis and an an xaxis. i don't need fancy drawings ) that is a built in module 
in python ?  i am using python 2.4 in linux if that matters. thanks.


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From carsten at uniqsys.com  Mon Feb 13 13:50:11 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 13 Feb 2006 13:50:11 -0500
Subject: cx_Oracle string problems...
In-Reply-To: <1139854719.427035.19820@g47g2000cwa.googlegroups.com>
References: <1139850767.853237.122710@f14g2000cwb.googlegroups.com>
	<1139852585.938381.247590@f14g2000cwb.googlegroups.com>
	<1139854719.427035.19820@g47g2000cwa.googlegroups.com>
Message-ID: <1139856611.11014.32.camel@dot.uniqsys.com>

On Mon, 2006-02-13 at 13:18, MooMaster wrote:
> Lol, that was a copy paste error into the post on my part...but the
> problem has been fixed. Turns out that there was a string.replace call
> somewhere else in the code that replaced all single quotes with empty
> strings, which thus caused the singe quotes to disappear! Whoops!

Please do yourself a favor and make use of the fact that Python's
database API allows parametrized queries. Here's a sketch of what that
might look like:

sql = 'INSERT INTO prime.utwsLOT VALUES (:kID, etc...)'
curse = self.connection.cursor()
curse.execute(sql, kID=self.kID, etc...)

Of course, "etc..." would have to be replaced with additional
placeholders and parameter values for all the columns in utwsLOT.

By using parametrized queries, you don't have to worry about any of the
supplied values requiring special treatment due to any quotation marks
or apostrophes that might they might contain.

Hope this helps,

Carsten.



From tjreedy at udel.edu  Sat Feb 11 16:35:23 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 11 Feb 2006 16:35:23 -0500
Subject: simple math question
References: <RuWdnVmaD4Q23XPeRVn-tw@rcn.net>
Message-ID: <dsllas$cva$1@sea.gmane.org>


"John Salerno" <johnjsal at NOSPAMgmail.com> wrote in message 
news:RuWdnVmaD4Q23XPeRVn-tw at rcn.net...
> Can someone explain to me why the expression 5 / -2 evaluates to -3,
> especially considering that -2 * -3 evaluates to 6?

With same sign int division, one can think of the result as either being 
rounding down or rounding to zero.  With mixed sign int division, rounding 
to zero becomes rounding up, so the language designer has to choose being 
consistent with one or the other but not both.  There are pluses and 
minuses either way and different language designers have made different 
choices between the two.

Guido's rational was posted some years ago but I forget.  You might be able 
to find something in Google's c.l.p archives, or on the web in general.

Terry Jan Reedy





From martin at v.loewis.de  Sun Feb 12 16:56:06 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 12 Feb 2006 22:56:06 +0100
Subject: Netstat in python. Does it's possible?
In-Reply-To: <slrnduv78b.2t1.grahn+nntp@frailea.sa.invalid>
References: <s1mHf.5180$9G6.428@tornado.fastwebnet.it>
	<43EE0286.5020409@v.loewis.de>
	<slrndusfol.2t1.grahn+nntp@frailea.sa.invalid>
	<43EE7B7E.5050802@v.loewis.de>
	<slrnduv78b.2t1.grahn+nntp@frailea.sa.invalid>
Message-ID: <43efaef5$0$29674$9b622d9e@news.freenet.de>

Jorgen Grahn wrote:
> I was thinking mostly about /proc, /sys and related file systems. I have a
> feeling parts of them they change quite frequently under Linux, and of
> course under other Unices they may look completely different, or be absent.
> 
> Like Mr Laird said elsewhere, the best thing might be to popen() netstat
> and parse its output.

Hmm. And the netstat output cannot change, and is identical across all
systems?

I agree that the format of the proc file system is different across
systems (or other systems don't use netstat at all), however, on all
systems I'm aware of, there is a certain committment to keeping the
proc file system stable for applications (on Solaris more so than
on Linux).

Regards,
Martin


From larry.bates at websafe.com  Thu Feb 23 19:06:46 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Thu, 23 Feb 2006 18:06:46 -0600
Subject: Concantenation and string slicing
In-Reply-To: <1140735316.752278.298490@v46g2000cwv.googlegroups.com>
References: <1140735316.752278.298490@v46g2000cwv.googlegroups.com>
Message-ID: <43FE4E16.6040304@websafe.com>

DannyB wrote:
> I've written a program that takes a phrase and spits it back out
> backwards.  My problem is it throws each character on a new line.  I'd
> like the phrase to be on the same line.  Is this possible?
> 
> #Backward Message
> 
> message = raw_input("Enter a message:  ")
> letter = len(message)
> while (letter > 0):
>         newMessage = ""
>         newMessage += message[letter-1]
>         letter -= 1
>         print newMessage
> 
> 
> Thanks!!
> 
> Dan
> 
Better was is:

message = raw_input("Enter a message:  ")
print message[::-1]

-Larry Bates


From scott.daniels at acm.org  Sat Feb  4 16:09:06 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sat, 04 Feb 2006 13:09:06 -0800
Subject: re.search slashes
In-Reply-To: <6P6Ff.754501$_o.451742@attbi_s71>
References: <Yj4Ff.746690$x96.167598@attbi_s72> <43e4f066$1@nntp0.pdx.net>
	<6P6Ff.754501$_o.451742@attbi_s71>
Message-ID: <43e516d7$1@nntp0.pdx.net>

pyluke wrote:
> Scott David Daniels wrote:
>> pyluke wrote:
>>> I... want to find lines with ... "\[" but not instances of "\\["
>>
>> If you are parsing with regular expressions, you are running a marathon.
>> If you are doing regular expressions without raw strings, you are running
>> a marathon barefoot.
> I'm not sure what you mean by running a marathon.

I'm referring to this quote from: http://www.jwz.org/hacks/marginal.html
     "(Some people, when confronted with a problem, think ``I know, I'll
     use regular expressions.'' Now they have two problems.)"

 > I do follow your statement on raw strings, but that doesn't seem
 > to be the problem.

It is an issue in the readability of your code, not the cause of the
code behavior that you don't like.  In your particular case, this is
all made doubly hard to read since your patterns and search targets
include back slashes.

> \[
>   \nabla \cdot u = 0
> \]
> 
> I don't want to find the following
> 
> \begin{tabular}{c c}
>   a & b \\[4pt]
>   1 & 2 \\[3pt]
> \end{tabular}
> 

how about:  r'(^|[^\\])\\\['
Which is:
     Find something beginning with either start-of-line or a
     non-backslash, followed (in either case) by a backslash
     and ending with an open square bracket.

Generally, (for the example) I would have said a good test set
describing your problem was:

     re.compile(pattern).search(r'\[   ') is not None
     re.compile(pattern).search(r' \[ ') is not None
     re.compile(pattern).search(r'\\[   ') is None
     re.compile(pattern).search(r' \\[   ') is None

--Scott David Daniels
scott.daniels at acm.org


From bignose+hates-spam at benfinney.id.au  Sat Feb 18 17:13:11 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 19 Feb 2006 09:13:11 +1100
Subject: share function argument between subsequent calls but not
	between class instances!
References: <11vejkega5tbrc5@corp.supernews.com>
	<Xns976EAB5E52818duncanbooth@127.0.0.1>
Message-ID: <87wtfsb9jc.fsf@rose.polar.local>

Duncan Booth <duncan.booth at invalid.invalid> writes:
> If you intend to only use the default some of the time, and at other
> times pass in a different list, then save the 'default' in the
> instance and use a special marker value to indicate when you intend
> the default to be used:

The most common idiom for such a marker is the None value.

    class Test(object):
        def __init__(self):
            self.L = []
        def f(self, a, L=None):
            if L is None:
                L = self.L
            L.append(a)
            return L

-- 
 \        "Consider the daffodil. And while you're doing that, I'll be |
  `\           over here, looking through your stuff."  -- Jack Handey |
_o__)                                                                  |
Ben Finney <http://www.benfinney.id.au/>


From reply.in.the.newsgroup at my.address.is.invalid  Mon Feb 13 18:42:47 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Tue, 14 Feb 2006 00:42:47 +0100
Subject: Location of Python modules
References: <1139854184.504114.46690@z14g2000cwz.googlegroups.com>
Message-ID: <i962v156si1mkhnmqgcn21r3lqpiadnmvv@4ax.com>

Byte:
>where are Python modules stored in Linux?

Where are eggs laid on the western hemisphere?

-- 
Ren? Pijlman


From p at ulmcnett.com  Fri Feb 17 19:10:04 2006
From: p at ulmcnett.com (Paul McNett)
Date: Fri, 17 Feb 2006 16:10:04 -0800
Subject: commenting out blocks of code
In-Reply-To: <20060217231846.87613.qmail@web36708.mail.mud.yahoo.com>
References: <20060217231846.87613.qmail@web36708.mail.mud.yahoo.com>
Message-ID: <43F665DC.2000201@ulmcnett.com>

john peter wrote:
>  in java, i can  prevent a block of code from executing
> by bracketing the block with comment indicators, as shown
> below:
> /*
>   statement1 will not execute;
>   statement2 will not execute;
> */
>   statement3 will execute
> 
> is there a similar mechanism in python, other than prefixing
> the '#' character to the start of each statement i do  not
> want to execute (which gets old very quickly if one needs to
> comment and uncomment several statements a couple of
> times while "playing around with code" say during initial design)?

IMO this is a missing feature in Python. However, if the block of code 
you are wanting to comment out doesn't happen to contain any 
triple-quotes, you can surround the code with those. For example:

def myFunc(arg):
	return arg + 2

"""
def myFunc(arg):
	return arg + 1
"""

 >>> print myFunc(2)
4


-- 
Paul




From lycka at carmen.se  Tue Feb 28 03:28:14 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Tue, 28 Feb 2006 09:28:14 +0100
Subject: PEP 354: Enumerations in Python
In-Reply-To: <mailman.2473.1141049145.27775.python-list@python.org>
References: <87accdplbj.fsf@rose.polar.local>	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>	<4402AB7F.7070804@REMOVEMEcyber.com.au>
	<mailman.2473.1141049145.27775.python-list@python.org>
Message-ID: <du11iu$ttc$2@wake.carmen.se>

Tim Chase wrote:
> ...        throw UnthrowableKoan
> ...
> 
> (okay...maybe it's a little too early on a weekdays.mon morning)

Probably, since a SyntaxError slipped in. Throw is C++ Tim.
It's "raise UnRaisableKoan".


From ian at excess.org  Mon Feb 20 14:05:08 2006
From: ian at excess.org (Ian Ward)
Date: Mon, 20 Feb 2006 14:05:08 -0500
Subject: ANN: Urwid 0.9.0 - Console UI library
Message-ID: <43FA12E4.1080106@excess.org>

Announcing Urwid 0.9.0
----------------------

Urwid home page:
  http://excess.org/urwid/

Tarball:
  http://excess.org/urwid/urwid-0.9.0.tar.gz

Screenshots:
  http://excess.org/urwid/utf8examples.html


About this release:
===================

This is the first release of Urwid with UTF-8 input and display support.
A new raw_display module was added to enable UTF-8 display.  This module
also fixes the "dead corner" in the bottom right of the screen and
improves legibility of bright text in some terminals.


New in this release:
====================

  - New support for UTF-8 encoding including input, display and editing
    of narrow and wide (CJK) characters.

    Preliminary combining (zero-width) character support is included,
    but full support will require terminal behavior detection.

    Right-to-Left input and display are not implemented.

  - New raw_display module that handles console display without relying
    on external libraries.  This module was written as a work around
    for the lack of UTF-8 support in the standard version of ncurses.

    Eliminates "dead corner" in the bottom right of the screen.

    Avoids use of bold text in xterm and gnome-terminal for improved
    text legibility.

  - Fixed overlay bug related to UTF-8 handling.

  - Fixed Edit.move_cursor_to_coords(..) bug related to wide characters
    in UTF-8 encoding.


About Urwid
===========

Urwid is a console UI library for Python. It features fluid interface
resizing, UTF-8 support, multiple text layouts, simple attribute markup,
powerful scrolling list boxes and flexible interface design.

Urwid is released under the GNU LGPL.




From aahz at pythoncraft.com  Fri Feb 24 13:31:25 2006
From: aahz at pythoncraft.com (Aahz)
Date: 24 Feb 2006 10:31:25 -0800
Subject: python-list/python-dev quoting style
References: <dtml9t$367$1@gemini.csx.cam.ac.uk>
Message-ID: <dtnjdt$n9q$1@panix2.panix.com>

In article <dtml9t$367$1 at gemini.csx.cam.ac.uk>,
Michael Hoffman  <cam.ac.uk at mh391.invalid> wrote:
>Does anyone have a script to convert more conventional USENET quoting 
>style like this:
>
>John wrote:
>> Jacob Jingleheimer Schmidt <jjs at example.net> wrote in message-id 
><gratuitous-detail> on 29 February 2004:
>>> Lambda is the best Python feature ever!
>>
>> I disagree.
>
>to the commonly used python-dev/python-list style like this:
>
>[Jacob Jingleheimer Schmidt]
>>> Lambda is the best Python feature ever!
>
>[John]
>> I disagree.

Blech.  Stick with the standard Usenet quoting style for both!
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"19. A language that doesn't affect the way you think about programming,
is not worth knowing."  --Alan Perlis


From claird at lairds.us  Mon Feb 20 12:08:02 2006
From: claird at lairds.us (Cameron Laird)
Date: Mon, 20 Feb 2006 17:08:02 GMT
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<yfspsljp321.fsf@oc.ex.ac.uk>
	<mailman.2131.1140377578.27775.python-list@python.org>
	<yfsbqx3ov29.fsf@oc.ex.ac.uk>
Message-ID: <eq7pc3-ml5.ln1@lairds.us>

In article <yfsbqx3ov29.fsf at oc.ex.ac.uk>,
Alexander Schmolck  <a.schmolck at gmail.com> wrote:
			.
			.
			.
>However I don't find it at all implausible to assume that had Guido known all
>the stuff that say, David Ungar and Guy Steele were aware of at the same time,
>python would have come out not necessarily less dynamic but considerably
>faster -- to its own detriment.
>
>'as


Alexander, you've lost me.  I *think* you're proposing that,
were Guido more knowledgeable, he would have created a Python
language that's roughly as we know now, implemented it with
FASTER software ... and "to its own detriment".  Do you truly
believe that fewer people would use Python if its execution
were faster?


From mrstephengross at hotmail.com  Mon Feb 20 23:49:06 2006
From: mrstephengross at hotmail.com (Stephen Gross)
Date: Mon, 20 Feb 2006 23:49:06 -0500
Subject: Building python 2.4.2 on Cygwin
References: <1140467074.739405.163440@g44g2000cwa.googlegroups.com>
	<20060220214414.GA1924@tishler.net>
Message-ID: <BAY103-DAV260105A00AAD2FCF161F8DBFC0@phx.gbl>

> On Mon, Feb 20, 2006 at 12:24:34PM -0800, mrstephengross wrote:
>> Ok, I'm working on building python 2.4.2 on cygwin. I *think* it's
>> version 3.0 or 3.1 (is there a quick way to find out what version of
>> cygwin is running within a shell?)
> 
> Use "uname -r".  What version are you running?

Uname tells me:

$ uname -r
1.5.18(0.132/4/2)

--Steve


From cjw at sympatico.ca  Thu Feb  9 15:22:55 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Thu, 09 Feb 2006 15:22:55 -0500
Subject: What editor shall I use?
In-Reply-To: <1139410110.389122.215400@z14g2000cwz.googlegroups.com>
References: <1139410110.389122.215400@z14g2000cwz.googlegroups.com>
Message-ID: <xwNGf.37315$1e5.667572@news20.bellglobal.com>

Lad wrote:
> What editor shall I use if my Python script must contain utf-8
> characters?
> I use XP
> Thank you for reply
> l.b.
> 
I like PyScripter, although it's much more than an editor.
    http://mmm-experts.com/Products.aspx?ProductId=4

Colin W


From scott.daniels at acm.org  Thu Feb 23 18:06:47 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Thu, 23 Feb 2006 15:06:47 -0800
Subject: What's up with this code?
In-Reply-To: <1140700754.171942.70530@o13g2000cwo.googlegroups.com>
References: <1140649331.924736.128420@g43g2000cwa.googlegroups.com>
	<43fd08cf$1@nntp0.pdx.net>
	<1140699277.658249.280130@u72g2000cwu.googlegroups.com>
	<1140700754.171942.70530@o13g2000cwo.googlegroups.com>
Message-ID: <43fe3e65$1@nntp0.pdx.net>

Gregory Petrosyan wrote:
> Oh, by the way, is there any documentation about time of execution of
> standard functions?
Nope.  The reason is (A) that's a lot of work, (B) there are too many
caveats in practice to make such information useful, (C) any such spec
might corner the possible implementations in a later version.

 > is len(list) O(1) or O(n), etc) and is there any C version of decimal?
len(list) is O(1), list[n] is O(1), and if you (and others) continue
using decimal and it gets popular, rest assured that it will get faster.
Also, dictionary access is \Theta(1) (but only because you run on
machines with quite finite limitations).

The general Python rule when writing is "only worry about fast enough"
and optimize only after the code works and it needs to be faster.
Further, to determine speed, measure (use the timeit module) rather than
guess.  Nobody's intuition is great WRT performance, and you'd be
shocked at the number of hours people spend speeding up a chunk of code
that cannot possibly substantially affect an applications performance.

--Scott David Daniels
scott.daniels at acm.org


From xavier.morel at masklinn.net  Sun Feb 26 07:15:53 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Sun, 26 Feb 2006 13:15:53 +0100
Subject: Pure python implementation of string-like class
In-Reply-To: <1140915354.024788.25720@z34g2000cwc.googlegroups.com>
References: <20060225.102645.74687871.kayama@st.rim.or.jp>
	<mailman.2433.1140880297.27775.python-list@python.org>
	<1140891600.822510.189140@v46g2000cwv.googlegroups.com>
	<dtqd37$2he$1@apollon.grec.isp.9tel.net>
	<1140915354.024788.25720@z34g2000cwc.googlegroups.com>
Message-ID: <dts5tc$9d$1@apollon.grec.isp.9tel.net>

Ross Ridge wrote:
> Xavier Morel wrote:
>> Not if you're still within Unicode / Universal Character Set code space.
> 
> Akihiro Kayama in his original post made it clear that he wanted to use
> a character set larger than entire Unicode code space.
> 
>                                       Ross Ridge
> 
He implies that, but in later messages he
1. Implies that he wants to use the Unicode private spaces, which are in 
the Unicode code space
2. Says explicitly that  his needs concern Kanji encoding, which do fit 
in the existing Unicode code space, even if you take the largest 
estimates of the number of existing Kanjis (~80000), and which are (I 
think)  already partially represented by the CJK Unified Ideograms and 
CJK Unified Ideograms extension A sets of regular Unicode.


From bonono at gmail.com  Tue Feb 21 02:14:54 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 20 Feb 2006 23:14:54 -0800
Subject: Augmented assignment
In-Reply-To: <mailman.2208.1140504408.27775.python-list@python.org>
References: <dte88n$568$2@home.itg.ti.com>
	<mailman.2208.1140504408.27775.python-list@python.org>
Message-ID: <1140506094.387829.60890@g14g2000cwa.googlegroups.com>


Terry Reedy wrote:
> Program performance might be noticeable if 'x' is something like a.b.c.d
> that takes some lookup time.  But again, I would use the += form for
> readability without testing run time.

Would x=x + 1 be more readable, regardless of the background(whether
being introduced to the += form in some other language like C before) ?



From rtilley at vt.edu  Mon Feb 13 14:43:24 2006
From: rtilley at vt.edu (rtilley)
Date: Mon, 13 Feb 2006 19:43:24 +0000
Subject: readlines and break apart based on letters
In-Reply-To: <dsqpsb$lhb$1@solaris.cc.vt.edu>
References: <dsqpsb$lhb$1@solaris.cc.vt.edu>
Message-ID: <dsr91t$ef1$1@solaris.cc.vt.edu>

I got this to work... just FYI:

s = 
'O:owner_sidG:group_sidD:dacl_flags(string_ace1)(string_ace2)...(string_acen)S:sacl_flags(string_ace1)(string_ace2)...(string_acen)'

SD = {}

S = str.split(s, 'S:')
SD['S_ACL'] = S[1]
D = str.split(S[0], 'D:')
SD['D_ACL'] = D[1]
G = str.split(D[0], 'G:')
SD['G_SID'] = G[1]
O = str.split(G[0], 'O:')
SD['O_SID'] = O[1]

for k,v in SD.iteritems():
     print k,v


From jes at nl.demon.net  Fri Feb  3 17:59:46 2006
From: jes at nl.demon.net (Jim Segrave)
Date: Fri, 03 Feb 2006 22:59:46 -0000
Subject: MySQLdb question... using table name as arg
References: <%cNEf.19800$sA3.14913@fed1read02>
Message-ID: <11u7o32q27aosb1@corp.supernews.com>

In article <%cNEf.19800$sA3.14913 at fed1read02>,
Sean Berry <sean at buildingonline.com> wrote:
>I have four tables that all have the same column names (50 in each.)
>
>I have created an admin program to edit, delete and add records to the 
>tables and would like to use the table name as a variable in each query so 
>the code can be used for each of the 4 tables.  Usually I would do something 
>like this by having 1 table with special column to categorize the records as 
>I am doing with each table, but this specific application requires that I do 
>it with 4 tables instead.
>
>To ensure that string are quoted properly without any hassle I use the 
>execute function like so assuming c is my cursor object...
>
>c.execute("update tableName set col1 = %s, col2 = %s, col3 = %s, ...", 
>(val1, val2, val3, ...))
>
>But, not I want to do this with a variable tableName.  If I add it to the 
>tuple of parameters in the second arg before val1 and replace tableName with 
>%s, then the tableName will be quoted in the query, causing an error.
>
>What is the best (easiest) way for me to accomplish this?  I know it may be 
>a stupid question but I just can't figure it out.

How about interpolating the table name into the string:

c.execute("update %s set col1 = %%s, col2 = %%s, col3=%%s" % (sometable), \
          ['the', 'cat', 'in the hat'])

Note the need to double the %'s for the parameters to be bound.




-- 
Jim Segrave           (jes at jes-2.demon.nl)



From kay.schluehr at gmx.net  Tue Feb 21 05:38:54 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 21 Feb 2006 02:38:54 -0800
Subject: Python vs. Lisp -- please explain
In-Reply-To: <yfsslqdmxoa.fsf@oc.ex.ac.uk>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<yfspsljp321.fsf@oc.ex.ac.uk>
	<1140441519.702761.326130@g14g2000cwa.googlegroups.com>
	<pan.2006.02.20.21.05.17.947577@REMOVETHIScyber.com.au>
	<1140471528.655265.312730@f14g2000cwb.googlegroups.com>
	<yfsslqdmxoa.fsf@oc.ex.ac.uk>
Message-ID: <1140518334.035011.243270@o13g2000cwo.googlegroups.com>


Alexander Schmolck wrote:
> "Kay Schluehr" <kay.schluehr at gmx.net> writes:
>
> > Alexanders hypothesis is completely absurd.
>
> You're currently not in the best position to make this claim, since you
> evidently misunderstood what I wrote (I certainly did not mean to suggest that
> Guido *deliberately* chose to make python slow; quite the opposite in fact).

Like everyone else. It's sometimes hard extract the intended meaning in
particular if it's opposed to the published one. I apologize if I
overreacted.

>
> Maybe I wasn't sufficiently clear, so if rereading my original post doesn't
> bring about enlightenment, I'll try a restatement.
>
> > It turned out over the years that capabilities of Python optimization are
> > lower than those of Lisp and Smalltalk. But its a system effect and
> > epiphenomenon of certain design decisions.
>
> The point is that the design decisions, certainly for Common Lisp, scheme and
> particularly for dylan where also informed by what could be done
> *efficiently*, because the people who designed these languages knew a lot
> about advanced compiler implementation strategies for dynamic languages and
> thought that they could achieve high levels of expressiveness whilst retaining
> the possibility of very fast implementations (IIRC dylan specifically was
> meant to be something like within 90% of C performance). CL and dylan were
> also specifically designed for building very large and sophisticated systems,
> whereas it seems Guido originally thought that python would scale to about 500
> LOC.

O.K. To repeat it in an accurate manner. Python was originally designed
by Guido to be a scripting language for a new OS as a more complete
version of a shell scripting language. Unlike those its design was
strongly influenced by the usability ideas of the ABC development team.
Therefore speed considerations were not the primary concern but an open
model that was easily extendable both on the C-API level and the
language level. So a VM architecture was chosen to achieve this. Adding
new opcodes should have been as simple as interfacing with the C-API.
After growing strongly in the late 90s large scale projects emerged
such as Zope and many users started to request more Python performance
since they wanted to escape from the dual-language model. Writing
C-code was not self evident for a new programmers generation grewn up
with Java and the ffi turned out to be a hurdle. After remodeling the
object core ( "new style classes" ) progressive optimizations came to
hold. In 2002 a new genius programmer entered the scene, namely Armin
Rigo, who came up with Psyco and launched the PyPy project together
with a few other Python hackers in order to aggressively optimize
Python using Pythons introspective capabilities. That's were we still
are.

Remembering the historical context we might draw some parallels to
other contexts and language design intentions. We might also figure out
parallels and differences between motives of language designers and
leading persons who drive language evolution. Python is not just Guido
although his signature is quite pervasive. In his latest musings he
comes back to his central idea of language design as a kind of user
interface design. It's probably this shift in perspective that can be
attributed as original to him and which goes beyond making things just
"simple" or "powerfull" or "efficient" ( at least he made this shift
public and visible ). It is also the most controversial aspect of the
language because it is still inseparable from technical decisions (
non-true closures, explicit self, statement-expression distinction,
anonymous function as an expression with limited abilities etc. )

Kay



From deets at nospam.web.de  Tue Feb  7 12:16:51 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 07 Feb 2006 18:16:51 +0100
Subject: Is Python good for web crawlers?
References: <1139330008.270988.227170@g44g2000cwa.googlegroups.com>
	<mailman.1555.1139330693.27775.python-list@python.org>
	<1139332188.851343.20580@g14g2000cwa.googlegroups.com>
Message-ID: <44s30nF38tqrU1@uni-berlin.de>

Tempo wrote:

> Why do you say that the bottleneck of the crawler will always be
> downloading the page? Is it becasue there isn't already a modual to do
> this and I will have to start from scratch? Or a bandwidth issue?

Because of bandwidth - not necessarily yours directly, but the maximum flow
between your uplink and the site in question. It will always take at least
a fractioin of a second up to several seconds until the data is there - in
that time, lots of python code can run.

Diez


From exarkun at divmod.com  Thu Feb 16 12:40:22 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 16 Feb 2006 12:40:22 -0500
Subject: question about scope
In-Reply-To: <9J0Jf.1630$No6.38274@news.tufts.edu>
Message-ID: <20060216174022.6122.44277867.divmod.quotient.697@ohm>

On Thu, 16 Feb 2006 15:18:29 GMT, John Salerno <johnjsal at nospamgmail.com> wrote:
> [snip]
>
>I understand what global and built-in are, and I thought I understood
>the concept of local too, but when I got to this sentence (and the
>previous sentence), I became confused about the first two scopes. What's
>the difference between 'local' and 'enclosing functions'? I thought that
>the only way to create a local namespace was if there *was* a function
>definition, so now I'm confused by the apparent difference that the
>authors are referring to. What's an example of a local scope without
>having a function definition? Loops and if statements, perhaps?

    print dir # comes from __builtins__
    dir = 10
    print dir # comes from globals
    def foo():
        dir = 10
        print dir # comes from locals
        def bar():
            print dir # comes from "enclosing scope" - foo's scope

Hope this helps,

Jean-Paul


From gregpinero at gmail.com  Sat Feb  4 02:18:27 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Sat, 4 Feb 2006 02:18:27 -0500
Subject: Recursive function going infinite and I can't see why.
Message-ID: <312cfe2b0602032318i3fcb075di31406adefd1bbe@mail.gmail.com>

Hi,

Would anyone be able to tell me why my function below is getting stuck
in infinite recusion?
Maybe I'm just tired and missing something obvious?

def replace_within_node(node,oldnode,newnode):
    if node is oldnode:
        return newnode
    else:
        for varname,value in node.__dict__.items():
            node.__dict__[varname]=replace_within_node(value,oldnode,newnode)
        return node

At the end of this email I pasted the whole text of the sample code in
case it would help to see it in context or maybe step through it?

--
Gregory Pi?ero
Chief Innovation Officer
Blended Technologies
(www.blendedtechnologies.com)


#This is the code that's causing my problem:
#----------------------------------------------------------------------

import random
import sys

class Test_Class:
        pass
class Node:
    def __init__(self):
        self.arg0=0
        self.arg1=0
        self.arg2=0
        self.arg3=0

def snip(node):
    prob_of_returning_this_node=.4
    if random.random()<=prob_of_returning_this_node:
        return node
    else:
        if hasattr(node,'__dict__') and len(node.__dict__)>0:
            return snip(random.choice(node.__dict__.values()))
        else:
            return node

def replace_within_node(node,oldnode,newnode):
    if node is oldnode:
        return newnode
    else:
        if hasattr(node,'__dict__'):
            for varname,value in node.__dict__.items():
               
node.__dict__[varname]=replace_within_node(value,oldnode,newnode)
        return node

def generate_random_program(currdepth,mindepth=2,maxdepth=4):
    node=Node()
    if currdepth==maxdepth:
        return node
    else:
        node=Node()
        for varname,value in node.__dict__.items():
            node.__dict__[varname]=generate_random_program(currdepth+1,mindepth,maxdepth)
        return node

def breed(father,mother):
    #want to take subtree from each input parameter and swap them.
    snip_from_mother=snip(mother.program)
    snip_from_father=snip(father.program)
    program_for_father=replace_within_node(father.program,snip_from_father,snip_from_mother)
    program_for_mother=replace_within_node(mother.program,snip_from_mother,snip_from_father)
    return program_for_father,program_for_mother

if __name__=='__main__':
    dragons=[Test_Class() for i in range(10)]
    for dragon in dragons:
        dragon.program=generate_random_program(0)
    for i in range(100):
        breed(dragons[0],dragons[1])


From fabioz at esss.com.br  Thu Feb 16 11:29:42 2006
From: fabioz at esss.com.br (Fabio Zadrozny)
Date: Thu, 16 Feb 2006 14:29:42 -0200
Subject: [ANN] Pydev and Pydev Extensions 1.0.2 release
In-Reply-To: <43E78E4F.20703@esss.com.br>
References: <43382E1F.3000600@esss.com.br> <434E801E.3010702@esss.com.br>
	<43E78E4F.20703@esss.com.br>
Message-ID: <43F4A876.6030001@esss.com.br>

Hi All,

Pydev and Pydev Extensions 1.0.2 have been released

Check http://www.fabioz.com/pydev for details on Pydev Extensions

and http://pydev.sf.net has for details on Pydev

Highlights in Pydev Extensions:
-------------------------------

- New feature in the debugger: the console is available for probing when 
in 'suspendend mode'
- New feature in code analysis: Provided a way to consider tokens that 
should be in the globals
- Halt fix when too many matches where found in the go to definition.
- Code analysis minor bugs fixed.
- Error when opening browser fixed.


Highlights in Pydev:
-----------------------

- Jython debugging now working.
- Code coverage does not report docstrings as not being executed.
- Freeze when making a 'step-in' fixed in the debugger.
- Grammar generated with javacc version 4.0


Cheers,

Fabio

-- 
Fabio Zadrozny
------------------------------------------------------
Software Developer

ESSS - Engineering Simulation and Scientific Software
www.esss.com.br

Pydev Extensions
http://www.fabioz.com/pydev

PyDev - Python Development Enviroment for Eclipse
http://pydev.sf.net
http://pydev.blogspot.com




From mehmetmutigozel at gmail.com  Tue Feb 28 08:40:02 2006
From: mehmetmutigozel at gmail.com (mehmetmutigozel at gmail.com)
Date: 28 Feb 2006 05:40:02 -0800
Subject: compiled program input
In-Reply-To: <mailman.2510.1141133446.27775.python-list@python.org>
References: <1141131055.777748.153150@v46g2000cwv.googlegroups.com>
	<mailman.2510.1141133446.27775.python-list@python.org>
Message-ID: <1141134002.355298.99030@i39g2000cwa.googlegroups.com>

:) yes it does. thank you very much fredrick.



From dprovins at rpcl.com  Fri Feb 24 12:41:39 2006
From: dprovins at rpcl.com (Dean Allen Provins)
Date: Fri, 24 Feb 2006 17:41:39 GMT
Subject: Tkinter canvas size determination
In-Reply-To: <mailman.2403.1140794629.27775.python-list@python.org>
References: <43FC9532.2050800@rpcl.com>
	<lvjuc3-ph7.ln1@lairds.us>	<43FF22FB.5000407@rpcl.com>
	<mailman.2403.1140794629.27775.python-list@python.org>
Message-ID: <43FF456A.6010504@rpcl.com>

Martin:

Martin Franklin wrote:
> Dean Allen Provins wrote:
> 
>> Cameron:
>>
>> Cameron Laird wrote:
>>
>>> In article <43FC9532.2050800 at rpcl.com>,
>>> Dean Allen Provins  <dprovins at rpcl.com> wrote:
>>>
>>>> I need to determine the size of a canvas while the process is running.
>>>> Does anyone know of a technique that will let me do that?
>>>
>>>             .
>>>             .
>>>             .
>>> Does
>>>   >>> import Tkinter
>>>   >>> c = Tkinter.Canvas()
>>>   >>> c.create_oval(13, 51, 80, 130)
>>>   1
>>>   >>> c.pack()
>>>   >>> print c.cget("width")
>>>   284
>>> help?
>>>
>>> There are actually several different notions of the size of a
>>> canvas.  The example abovve should be a good starting point,
>>> though. 
>>> There's also a mailing list specifically for Tkinter <URL:
>>> http://tkinter.unpythonic.net/wiki/mailing_20lists  >; that
>>> might interest you.
>>
>>
>> I tried the "cget" function, and it returned the width that I had used
>> when creating the canvas - even though the canvas was wider than that
>> value at display time (and also after manually resizing the window).
>>
>> To your knowledge, is there a method to determine the current dimensions?
>>
>> Thanks,
>>
>> Dean
> 
> 
> 
> Dean,
> 
> Look at the winfo_* methods of Tkinter widgets, I think the one you want
> is called winfo_reqheight / winfo_reqwidth or something very similar
> pydoc Tkinter.Canvas will sort that out
> 
> Martin

Thanks.  That is exactly what I needed.  I tried it, and it returned the
desired values.

Regards,

Dean


From johnpote at blueyonder.co.uk  Tue Feb  7 12:46:32 2006
From: johnpote at blueyonder.co.uk (John Pote)
Date: Tue, 07 Feb 2006 17:46:32 GMT
Subject: Hi reliability files, writing,reading and maintaining
Message-ID: <Y15Gf.280109$D47.254492@fe3.news.blueyonder.co.uk>

Hello, help/advice appreciated.

Background:
I am writing some web scripts in python to receive small amounts of data 
from remote sensors and store the data in a file. 50 to 100 bytes every 5 or 
10 minutes. A new file for each day is anticipated.  Of considerable 
importance is the long term availability of this data and it's gathering and 
storage without gaps.

As the remote sensors have little on board storage it is important that a 
web server is available to receive the data. To that end two separately 
located servers will be running at all times and updating each other as new 
data arrives.

I also assume each server will maintain two copies of the current data file, 
only one of which would be open at any one time, and some means of 
indicating if a file write has failed and which file contains valid data. 
The latter is not so important as the data itself will indicate both its 
completeness (missing samples) and its newness because of a time stamp with 
each sample.
I would wish to secure this data gathering against crashes of the OS, 
hardware failures and power outages.

So my request:
1. Are there any python modules 'out there' that might help in securely 
writing such files.
2. Can anyone suggest a book or two on this kind of file management. (These 
kind of problems must have been solved in the financial world many times).

Many thanks,

John Pote







From __peter__ at web.de  Thu Feb  2 07:50:33 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 02 Feb 2006 13:50:33 +0100
Subject: Builder Pattern
References: <1138495045.948821.129010@z14g2000cwz.googlegroups.com>
	<1h9w0w5.1hjl1421g4btuoN%aleax@mail.comcast.net>
	<1138535681.097562.252810@g43g2000cwa.googlegroups.com>
	<1138883051.882700.94370@g44g2000cwa.googlegroups.com>
Message-ID: <drsv48$tts$02$1@news.t-online.com>

> I have converted another example of strategy which I prefer to the 2
> described earlier, here it is:
> 
> class FindMinima:
> ????????def algorithm(self):raise NotImplementedError

When most of your code does nothing in a pompous way that is a sure sign
that you are heading in the wrong direction. Here's a translation into
python:

def least_squares(line):
    return 1.1, 2.2

def newtons_method(line):
    return 3.3, 4.4

def bisection(line):
    return 5.5, 6.6

def conjugate_gradient(line):
    return 3.3, 4.4

def test():
    solver = least_squares
    print solver((5.5,5.5))
    solver = bisection
    print solver((5.5,5.5))

test()

Peter


From jimlewis at emachineshop.com  Fri Feb  3 08:16:26 2006
From: jimlewis at emachineshop.com (jimlewis at emachineshop.com)
Date: 3 Feb 2006 05:16:26 -0800
Subject: Server side newbie
In-Reply-To: <1138968318.121755.97100@g47g2000cwa.googlegroups.com>
References: <1138552847.103899.302880@g14g2000cwa.googlegroups.com>
	<1138968318.121755.97100@g47g2000cwa.googlegroups.com>
Message-ID: <1138972586.701860.208170@o13g2000cwo.googlegroups.com>

Thanks but the math is a bit complex and already coded and debugged in
a python desktop gui.



From steve at REMOVETHIScyber.com.au  Sun Feb  5 03:14:29 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sun, 05 Feb 2006 19:14:29 +1100
Subject: Generators vs. Functions?
References: <0001HW.C00ABC2B000323A6F0335550@news.individual.de>
	<43E50E73.40504@kzoo.edu>
	<mailman.1426.1139097119.27775.python-list@python.org>
	<gkeFf.434944$2k.218378@pd7tw1no>
Message-ID: <pan.2006.02.05.08.14.28.103057@REMOVETHIScyber.com.au>

On Sun, 05 Feb 2006 03:31:24 +0000, Neil Schemenauer wrote:

> Peter Hansen <peter at engcorp.com> wrote:
>> More precisely, the state of the function is *saved* when a yield 
>> occurs, so you certainly don't *recreate* it from scratch, but merely 
>> restore the state, and this should definitely be faster than creating it 
>> from scratch in the first place.
> 
> Right.  Resuming a generator is faster than calling a function.

Have you actually measured this, or are you just making a wild guess?

According to a short test performed by Magnus Lycka, resuming a generator
takes more time than calling a function. My own test agrees.

Here is my test, using Python 2.3. I've tried to make the test as fair as
possible, with the same number of name lookups in both pieces of test code.

# straight function, two name lookups

>>> import timeit
>>>
>>> t1 = timeit.Timer(stmt="func.next()", setup=
... """class K:
...   pass
...
... def next():
...   return 1
...
... func = K()
... func.next = next
... """)
>>>
>>> t1.timeit()
0.63980388641357422


# generator, two name lookups

>>> t2 = timeit.Timer(stmt="gen.next()", setup=
... """def g():
...   while 1: yield 1
...
... gen = g()
... """)
>>>
>>> t2.timeit()
0.82081794738769531


# straight function, one name lookup

>>> t3 = timeit.Timer(stmt="f()", setup=
... """def f():
...   return 1
... """)
>>> 
>>> t3.timeit()
0.47273492813110352


# generator, one name lookup 

>>> t4 = timeit.Timer(stmt="gnext()", setup=
... """def g():
...   while 1: yield 1
...
... gnext = g().next
... """)
>>>
>>> t4.timeit()
0.55085492134094238


So on the basis of my tests, there is a small, but significant speed
advantage to _calling_ a function versus _resuming_ a generator.

Of course the other advantages of generators often far outweigh the tiny
setup cost each time you call one. In addition, for any complex function
with significant execution time, the call/resume time may be an
insignificant fraction of the total execution time. There is little or no
point in avoiding generators due to a misplaced and foolish attempt to
optimise your code.


-- 
Steven.



From cdkrug at aol.com  Sat Feb 11 08:54:46 2006
From: cdkrug at aol.com (Charles Krug)
Date: Sat, 11 Feb 2006 07:54:46 -0600
Subject: Is there any books such as 'effective python' or else about the
	performance?
References: <mailman.1738.1139652404.27775.python-list@python.org>
Message-ID: <BsednUF7jNY7cXDeRVn-pA@comcast.com>

On 2006-02-11, Kenneth Xie <mailinglist4ken at gmail.com> wrote:
> att, thx.

A lot of the ideas discussed in Effective C++ et al are things that
Python does for us already.  C++ works at a much lower layer of
abstraction and you need to deal explicitly with freestore for any
nontrivial class.

EC++ is mostly about how NOT to crash your programs.

The Python Cookbook is a "more pythonic" version of the same
idea--proven techniques appropriate to the abstraction level of the
language.

Design Patterns is worth reading as well, but be careful with it.  Many
of the ideas that are difficult to do in C++, Java, Smalltalk, etc
(singletons come to mind) are trivially easy to do in Python because of
how our object model works.

Bruce Eckle's "Thinking in Python" gives a pattern introduction
explaining how things work in Python that can give you a sprinboard to
adapting other patterns from C++ et al.


From steve at REMOVETHIScyber.com.au  Tue Feb 21 17:16:00 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Wed, 22 Feb 2006 09:16:00 +1100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com>
	<mailman.2160.1140440898.27775.python-list@python.org>
	<1140454473.335788@jetspin.drizzle.com>
	<pan.2006.02.20.21.59.12.636908@REMOVETHIScyber.com.au>
	<1140490302.639049@jetspin.drizzle.com>
	<43FAD2C2.7080908@REMOVEMEcyber.com.au>
	<donn-F5C9CE.09462721022006@gnus01.u.washington.edu>
Message-ID: <pan.2006.02.21.22.15.59.192973@REMOVETHIScyber.com.au>

On Tue, 21 Feb 2006 09:46:27 -0800, Donn Cave wrote:

> In article <43FAD2C2.7080908 at REMOVEMEcyber.com.au>,
>  Steven D'Aprano <steve at REMOVEMEcyber.com.au> wrote:
> ...
>> Hey Donn, here is a compiled program for the PowerPC, 
>> or an ARM processor, or one of IBM's Big Iron 
>> mainframes. Or even a Commodore 64. What do you think 
>> the chances are that you can execute it on your 
>> x86-compatible PC? It's compiled, it should just 
>> work!!! Right?
>> 
>> No of course not. If your CPU can't interpret the 
>> machine code correctly, the fact that the code is 
>> compiled makes NO difference at all.

[snip for brevity]

> Sure, all this is true, except for the term "interpreter."
> You would surely not use the word that way, unless you
> just didn't want to communicate.

Do you honestly believe that the CPU doesn't have to interpret the machine
code, or are you just deliberately playing silly buggers with language?

In modern CPUs, there is an intermediate layer of micro-code between the
machine code your C compiler generates and the actual instructions
executed in hardware. But even if we limit ourselves to obsolete hardware
without micro-code, I ask you think about what an interpreter does, and
what the CPU does, in the most general way possible.

Both take a stream of instructions. Both have to take each instruction,
and execute it. In both cases the link between the instruction and the
effect is indirect: for example, the machine code 00000101 on the 
Zilog Z80 processor causes the CPU to decrement the B processor register.
In assembly language this would be written as DEC B. There is absolutely
nothing fundamental about the byte value 5 that inherently means
"decrement B processor register".

In other words, machine language is a language, just like it says, and
like all languages, it must be interpreted.

> Your paragraph above that starts with "No of course not",
> even omits a point that everyone understands, you can in
> fact expect a .py file will work independent of machine
> architecture - like any interpreted language.

Amazing. In your previous post you were telling everybody how the
*disadvantage* of interpreted programs is that they won't run unless the
interpreter is present, and in this post you are telling us that
interpreted languages will just work. What happened to the requirement for
an interpreter?

Let's see you run that Python program on a Zilog Z80 without a Python
interpreter. Can't be done. No interpreter, whether in hardware or
software, and the program won't run, whether in source code or byte code
or machine code.

If I allow that the machines have an interpreter, perhaps you'll return
the favour and install an interpreter for machine language (often called
an emulator). Now your compiled C or Lisp code also will run independent
of machine architecture.

In order to force "interpreted language" and "compiled language" into two
distinct categories, rather than just two overlapping extremes of a single
unified category, you have to ignore reality. You ignore interpreted
languages that are compiled, you ignore the reality of how machine code is
used in the CPU, you ignore the existence of emulators, and you ignore
virtual machines.


> We all know
> what native code compilation buys you and what it doesn't.

Did you fail to learn *anything* from my parable of interpreted Lisp on a
Macintosh II running faster than compiled Lisp running on a Mac II fitted
with a Lisp processor?


-- 
Steven



From nogradi at gmail.com  Tue Feb 14 10:23:06 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Tue, 14 Feb 2006 16:23:06 +0100
Subject: Embedding an Application in a Web browser
Message-ID: <5f56302b0602140723v123741ffweeee939cec9a3828@mail.gmail.com>

> Is it possible to embed a Python application within Internet explorer?
> If so how do people recommend going about it.
>
> As for the application it has to be able display simple animated
> graphics such as circles, lines and squares. However if someone clicks
> on a shape it should open up another application, such as Word.
>
> Thanks,
>
> Rod
>
> Python Newbie

Do you mean perhaps embedding python into a webserver? If you want to
use apache as your server that is possible, check the mod_python
module which embeds the python interpreter into apache. You can then
write your application in python (displaying your animated graphics,
etc) and visitors to your server will see what you the output from
your program.

For further info:

http://modpython.org/


From invitro81 at gmx.net  Sun Feb 26 17:01:26 2006
From: invitro81 at gmx.net (invitro81)
Date: Sun, 26 Feb 2006 23:01:26 +0100
Subject: Memory allocation in for loops
In-Reply-To: <CqCdnaHz040sRAHeRVn-vg@comcast.com>
References: <1134298072.537702.158870@g49g2000cwa.googlegroups.com>
	<CqCdnaHz040sRAHeRVn-vg@comcast.com>
Message-ID: <dtt8fm$2tm$1@news.hispeed.ch>

Which one is better w.r.t. memory allocation but also w.r.t. speed:

## 1.1 ##

def forloop(a,b):

	for idx in range(a,b):
		## ..
		## do something
		## ..

## 1.2 ##

def whileloop(a,b):

	idx = a
	while idx < b:
		## ..
		## do something
		## ..
		idx += 1

#########

I mean what I really would like is to have something C++ - like "for 
(int idx = a; idx < b; i++) { .. }" where no internal vector or 
something like that is allocated but only a few op's on registers are 
performed; in the whileloop in python the picture is roughly the same 
behind the scenes I guess.. but what about in the forloop? Is python 
smart enough not to generate an internal vector as it does usually for 
lists or do I have to apply some modifications (xrange..)? What happens 
further if I do the following:

## 2.1 ##

def forloop(a,b,lst):

	for idx in lst.sort():
		## ..
		## do something
		## ..

#######

Is the sorting function called in every iteration just to detect that 
(after the first sorting) it is useless comming back to the loop or does 
this happen:

## 2.2 ##

def forloop(a,b,lst):

	lst.sort()
	for idx in lst:
		## ..
		## do something
		## ..

#######


From onurb at xiludom.gro  Wed Feb 15 12:13:23 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Wed, 15 Feb 2006 18:13:23 +0100
Subject: Pythonic gui format?
In-Reply-To: <1140012875.616899.146890@f14g2000cwb.googlegroups.com>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<43f11990$0$667$626a54ce@news.free.fr>
	<1139923105.939191.200660@z14g2000cwz.googlegroups.com>
	<1140003644.055366.316620@g47g2000cwa.googlegroups.com>
	<43f314df$0$32162$626a54ce@news.free.fr>
	<1140012875.616899.146890@f14g2000cwb.googlegroups.com>
Message-ID: <43f36150$0$675$626a54ce@news.free.fr>

Fuzzyman wrote:
> bruno at modulix wrote:
> 
>>Fuzzyman wrote:
>>(snip)
>>
>>
>>>You say you don't want an 'extra layer' between your GUI  and Python -
>>>but your approach of using XML has the same drawback. Storing your 'GUI
>>>configuration' in a text based format is a nice idea, but you will need
>>>*something* to do the translation.
>>
>>Well, if the conf is valid Python, you've already get most of the
>>'something to do the translation' for free !-)
>>
> 
> 
> Except he can't use ordinary dictionaries because they don't preserve
> order, which is one of his requirements...

Except that dict ordering (or lack of) is not a problem here, cf my
other posts about this !-)

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From limodou at gmail.com  Mon Feb  6 11:41:04 2006
From: limodou at gmail.com (limodou)
Date: Tue, 7 Feb 2006 00:41:04 +0800
Subject: Size of list
In-Reply-To: <1139243538.269506.214060@f14g2000cwb.googlegroups.com>
References: <1139243538.269506.214060@f14g2000cwb.googlegroups.com>
Message-ID: <505f13c0602060841l719c9b00x@mail.gmail.com>

6 Feb 2006 08:32:18 -0800, Ernesto <erniedude at gmail.com>:
> for line in PM_File_Handle.readlines():
>         PM_fields = line.split(';')
>
> # Is there a way to get the size of PM_Fields here ?
> # Something like
>
> size = PM_fields.size( )
>
> #  I could not find this attribute in the python docs.  Thanks

try:

size = len(PM_fields)

--
I like python!
My Blog: http://www.donews.net/limodou
NewEdit Maillist: http://groups.google.com/group/NewEdit


From simon at titanic.co.uk  Fri Feb  3 12:01:29 2006
From: simon at titanic.co.uk (Simon Faulkner)
Date: Fri, 03 Feb 2006 17:01:29 +0000
Subject: Compiling
Message-ID: <43E38C69.9070007@titanic.co.uk>

Pardon me if this has been done to death but I can't find a simple 
explanation.

I love Python for it's ease and speed of development especially for the 
"Programming Challenged" like me but why hasn't someone written a 
compiler for Python?

I guess it's not that simple eh?

Simon


From tim.leeuwvander at nl.unisys.com  Thu Feb  2 15:14:16 2006
From: tim.leeuwvander at nl.unisys.com (Tim N. van der Leeuw)
Date: 2 Feb 2006 12:14:16 -0800
Subject: Detecting filename-encoding (on WinXP)?
In-Reply-To: <drtd0c$7gf$1@wake.carmen.se>
References: <1138896194.914220.60080@o13g2000cwo.googlegroups.com>
	<drtd0c$7gf$1@wake.carmen.se>
Message-ID: <1138911256.708199.223290@g43g2000cwa.googlegroups.com>

Hi Magnus,

I get the filename from a URL, which probably is not in any kind of
unicode-string but just a plain ASCII string. It should be possible to
cast this to an ASCII string -- I'll try it right away to see if this
works.

Thanks!

--Tim



From Sebastien.Boisgerault at gmail.com  Wed Feb 15 17:41:07 2006
From: Sebastien.Boisgerault at gmail.com (=?iso-8859-1?q?S=E9bastien_Boisg=E9rault?=)
Date: 15 Feb 2006 14:41:07 -0800
Subject: multiple inheritance
In-Reply-To: <1140041977.692748.133570@g43g2000cwa.googlegroups.com>
References: <1140041977.692748.133570@g43g2000cwa.googlegroups.com>
Message-ID: <1140043267.445069.218370@g43g2000cwa.googlegroups.com>


Thomas Girod a ?crit :

> Hi.
>
> I think I'm missing something about multiple inheritance in python.
>
> I've got this code.
>
> class Foo:
>     def __init__(self):
>         self.x = "defined by foo"
>         self.foo = None
>
> class Bar:
>     def __init__(self):
>         self.x = "defined by bar"
>         self.bar = None
>
> class Foobar(Foo,Bar):
>     pass
>
> fb = Foobar()
> print fb.x
> print fb.__dict__
>
> which returns :
>
> >>>
> defined by foo
> {'x': 'defined by foo', 'foo': None}
>
> So I guess not defining __init__ in my class Foobar will call __init__
> from my superclass Foo. Also __dict__ doesn't show an attribute
> 'bar':None so I guess Bar.__init__ is not called at all.
>
> I would like to have a subclass with all attributes from superclasses
> defined, and only the attribute from the first when there is conflict
> (i.e. in this case, Foobar would be like this but with bar:None)
>
> I tried this :
>
> class Foobar(Foo,Bar):
>     def __init__(self):
>         Foo.__init__(self)
>         Bar.__init__(self)
>
> >>>
> defined by bar
> {'x': 'defined by bar', 'foo': None, 'bar': None}
>
> Here I have all I want, except the value of 'x' comes from the 'Bar'
> superclass rather than Foo. So, to have what I want, I would have to
> invert the two calls to __init__ in order to have the right x value.
>
> What I find awkward here is that the order of __init__ calls matters,
> rather than the order of the classes in the class declaration.
>
> Do you have any ideas of a way to get this multiple inheritance thing
> solved without having to do those __init__ calls ?

try:

class Foo(object):
    def __init__(self):
        super(Foo, self).__init__() # not really necessary here
        self.x = "defined by foo"

class Bar(object):
    def __init__(self):
        super(Bar, self).__init__()
        self.x = "defined by bar"

class FooBar(Foo, Bar):
    def __init__(self):
        super(FooBar, self).__init__()


and search for the "cooperative methods and super" section
in http://www.python.org/2.2/descrintro.html

Cheers,

SB


> 
> Thomas



From iddw at hotmail.com  Thu Feb 16 16:13:28 2006
From: iddw at hotmail.com (Dave Hansen)
Date: Thu, 16 Feb 2006 15:13:28 -0600
Subject: Merging two lists of data (Pythonic way)
References: <8k5Jf.27896$sA3.57@fed1read02>
	<1140122391.823206.74580@g14g2000cwa.googlegroups.com>
	<qD5Jf.27899$sA3.5853@fed1read02>
Message-ID: <5iq9v11peim9ehamh39v2fcilq3ndq1s52@4ax.com>

On Thu, 16 Feb 2006 12:51:24 -0800 in comp.lang.python, "SMB"
<sean at buildingonline.com> wrote:

>
>"Jonathan Gardner" <jgardner at jonathangardner.net> wrote in message 
>news:1140122391.823206.74580 at g14g2000cwa.googlegroups.com...
>> codes = map(lambda x: x[0], list1)
>> for d in list2:
>>  if d['code'] in codes:
>>    d['VERIFIED'] = 1
>>
>> Is this what you were looking for?
>>
>
>That is exactly what I was looking for.  I will have to take a look at map.

You might also look at list comprehensions.  Replacing the first line
in the above with

   codes = [x[0] for x in list1]

should yield the same result.

Regards,
                                        -=Dave

-- 
Change is inevitable, progress is not.


From apgwoz at gmail.com  Fri Feb  3 10:32:10 2006
From: apgwoz at gmail.com (Andrew Gwozdziewycz)
Date: Fri, 3 Feb 2006 10:32:10 -0500
Subject: would it be feasable to write python DJing software
In-Reply-To: <11u6t3qc13jplad@corp.supernews.com>
References: <1138925819.465108.181760@o13g2000cwo.googlegroups.com>
	<druc1r$cre$1@bagan.srce.hr>
	<1138962918.427815.70300@g14g2000cwa.googlegroups.com>
	<drvdq6$gjq$1@bagan.srce.hr> <11u6t3qc13jplad@corp.supernews.com>
Message-ID: <8ba244fb0602030732l5ca57cd0i7b9227059b232efd@mail.gmail.com>

> If that's the way you want to look at it, there is nothing that
> can be done in pure python.  Both the built-ins and the basic
> operators and sematics are implimented in C.

What makes python a powerful programming language? It's the fact that
it bundles up all sorts of c-code into a nice easy to use language.
When you write _any_ python, you are taking a peice of c here, a piece
of c here, and when you import a "pure python" module, you're really
just importing more c, because it's all being built from c.

What makes a builtin faster? It's the fact that there's less work to
be done before it's called. As more work needs to get done to find the
builtins that make it possible to run, execution time increases. Plain
and simple.

So, to answer the original posters question, Use python to peice
together the things you need. You're development time will be fast,
and you will probably see some good results.




--
Andrew Gwozdziewycz <apgwoz at gmail.com>
http://ihadagreatview.org
http://plasticandroid.org


From codecraig at gmail.com  Sat Feb 18 12:51:27 2006
From: codecraig at gmail.com (abcd)
Date: 18 Feb 2006 09:51:27 -0800
Subject: Get parameters from URL using CGI
Message-ID: <1140285087.919635.74530@g43g2000cwa.googlegroups.com>

i want to create a CGI script which simply prints out values given via
the URL (such as when a GET is performed).

So if I have a script named, foo.cgi ....and I access it by going to:

http://www.somesite.com/cgi-bin/foo.cgi?name=john&age=90

I want foo.cgi to print out:
name: john
age: 90


how do i get the values from the URL like that?

thanks



From pmartin at snakecard.com  Thu Feb 23 22:42:13 2006
From: pmartin at snakecard.com (Philippe Martin)
Date: Thu, 23 Feb 2006 21:42:13 -0600
Subject: Python stdout and Win 2003
References: <MbuLf.18349$2c4.6292@dukeread11>
Message-ID: <pgvLf.18356$2c4.18248@dukeread11>

PS: I forgot to mention that some of the "print"s are made from wxPython
timer events.

Philippe


Philippe Martin wrote:

> Hi,
> 
> I have a program at a customer's site that seems to have random problem
> which eventually come down to not being able to read/write from serial
> ports.
> 
> I trapped all the exceptions I could think of and all of them look like
> this:
> ***********************************
> (ACCESS CONTROL)Fri, 24 Feb 2006 02:07:18 +0000 : Traceback (most recent
> call last):
>   File "C
> \Python24\lib\site-packages\SC\readers\SC_IDTech_MiniSmart_RS232.py", line
> 308, in Is_Card_Inserted
>     print 'CARD NOT INSERTED'
> IOError: [Errno 9] Bad file descriptor
> ***********************************
> 
> To me that means the print failed ... that stdout was not available
> anymore.
> 
> Am I correct? .... what could cause this.
> 
> 
> Many thanks.
> 
> Philippe



From aleaxit at yahoo.com  Wed Feb  8 01:12:52 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Tue, 7 Feb 2006 22:12:52 -0800
Subject: how to copy a Python object
References: <1139301392.205225.48690@o13g2000cwo.googlegroups.com>
	<1139308149.557027.77160@z14g2000cwz.googlegroups.com>
	<1139309738.750080.183090@g47g2000cwa.googlegroups.com>
	<dsa2qr$89i$1@news2.rz.uni-karlsruhe.de>
Message-ID: <1haetkq.vpm95g4aixxhN%aleaxit@yahoo.com>

Sch?le Daniel <uval at rz.uni-karlsruhe.de> wrote:
   ...
>  >>> class X(object):
> ...     def __init__(self,lst):
> ...             self.lst = lst
> ...     def copy(self):
> ...             return X(self.lst[:])
> ...     def __str__(self):
> ...             return "lst has id %i" % id(self.lst)
   ...
> ... anyone?
> are there better approaches?

def __getstate__(self): return self.lst

def __setstate__(self, L): self.lst = L

and copy an instance x of X with copy.copy(x) [[after import copy, of
course]].  This will also support pickling &c.  getstate/setstate are
generally the best approach.  An equally good alternative here, omit
setstate and just:

def __getstate__(self): return dict(lst=self.lst)


Alex



From gene.tani at gmail.com  Thu Feb  9 08:52:38 2006
From: gene.tani at gmail.com (gene tani)
Date: 9 Feb 2006 05:52:38 -0800
Subject: Twisted book opinions?
In-Reply-To: <mailman.1653.1139486125.27775.python-list@python.org>
References: <c6ad9ed3d5279f24699b21f819438555@cogeco.ca>
	<mailman.1653.1139486125.27775.python-list@python.org>
Message-ID: <1139493158.820123.17250@o13g2000cwo.googlegroups.com>


Matt Goodall wrote:
> Jay Parlar wrote:
> > I was hoping to get some c.l.p. opinions on O'Reilly's new Twisted book.
>
> I think it's a good book to get. I know a fair amount about Twisted but
> it still made for interesting reading.
>
> Tommi Virtanen (aka tv) posted a great review of the book shortly after
> it was published. <http://tv.debian.net/articles/review-snakeball/>.
>
> - Matt

here are some other useful sources

http://www.pyzine.com/Issue006/Section_Articles/article_GettingTwisted.html
http://www.onlamp.com/pub/a/python/2004/01/15/twisted_intro.html
http://www.onlamp.com/pub/a/python/2004/02/12/advanced_nio.html

http://www.rexx.com/~dkuhlman/twisted_patterns.html
http://www.python.org/pycon/papers/applications.html



From rrr at ronadam.com  Tue Feb 28 14:12:49 2006
From: rrr at ronadam.com (Ron Adam)
Date: Tue, 28 Feb 2006 13:12:49 -0600
Subject: sort one list using the values from another list
In-Reply-To: <1141085589.680130.204380@j33g2000cwa.googlegroups.com>
References: <mailman.2447.1140969980.27775.python-list@python.org>
	<Bb-dncKoOeYvQ5zZRVn-uw@comcast.com>
	<1140981038.788111.93500@j33g2000cwa.googlegroups.com>
	<9bpMf.109707$4l5.58949@dukeread05>
	<1140990438.693026.14600@p10g2000cwp.googlegroups.com>
	<00sMf.109743$4l5.9230@dukeread05>
	<1hbdmux.1uvypp25sjx7jN%aleaxit@yahoo.com>
	<I6tMf.109755$4l5.106334@dukeread05>
	<zpAMf.109772$4l5.24415@dukeread05> <44034b68$1@nntp0.pdx.net>
	<VRLMf.110114$4l5.62634@dukeread05>
	<1141085589.680130.204380@j33g2000cwa.googlegroups.com>
Message-ID: <gj1Nf.110404$4l5.81001@dukeread05>

bearophileHUGS at lycos.com wrote:
> Following Ron Adam solution (and using [] instead of list() in the last
> line), this may be a possible solution of the problem, that is often
> quite fast:
> 
> def psort16(s1, s2):
>     try:
>         d = dict(izip(s2, s1))
>     except TypeError:
>         _indices = range(len(s1))
>         _indices.sort(key=s2.__getitem__)
>         s1[:] = map(s1.__getitem__, _indices)
>     else:
>         if len(d) == len(s1):
>             s1[:] = [d[v] for v in sorted(d)]
>         else:
>             _indices = range(len(s1))
>             _indices.sort(key=s2.__getitem__)
>             s1[:] = map(s1.__getitem__, _indices)
> 
> Bye,
> bearophile

Looks good, but I think It would be simpler to just do.

def psort17(s1, s2):
     try:
         d = dict(izip(s2, s1))
         assert len(d) != len(s2)
         s1[:] = [d[v] for v in sorted(d)]
     except Exception:
         _indices = range(len(s1))
         _indices.sort(key=s2.__getitem__)
         s1[:] = map(s1.__getitem__, _indices)

We don't need to specify which exception.  Any problems will just get 
raised again on the second try it also fails.

Cheers,
    Ron






From steve at REMOVETHIScyber.com.au  Mon Feb 20 16:59:13 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Tue, 21 Feb 2006 08:59:13 +1100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com>
	<mailman.2160.1140440898.27775.python-list@python.org>
	<1140454473.335788@jetspin.drizzle.com>
Message-ID: <pan.2006.02.20.21.59.12.636908@REMOVETHIScyber.com.au>

On Mon, 20 Feb 2006 16:54:34 +0000, Donn Cave wrote:

> The reason this isn't just an abstruse philosophical argument where it
> makes sense for us to obtusely cling to some indefensible point of view,
> is that as the man points out, there are differences that we can't hide
> forever from potential Python users.  The most obvious to me is that
> your Python program essential includes its interpreter - can't go anywhere
> without it, and any change to the interpreter is a change to the program.
> There are various strategies to address this, but pretending that Python
> isn't interpreted is not one of them.

Python programs (.py files) don't contain an interpreter. Some of those
files are *really* small, you can't hide a full blown Python interpreter
in just half a dozen lines.

What you mean is that Python programs are only executable on a platform
which contains the Python interpreter, and if it is not already installed,
you have to install it yourself.

So how exactly is that different from the fact that my compiled C program
is only executable on a platform that already contains the correct machine
code interpreter, and if that interpreter is not already installed, I have
to install a machine code interpreter (either the correct CPU or a
software emulator) for it?

Moving compiled C programs from one system to another one with a different
CPU also changes the performance (and sometimes even the semantics!) of
the program. It is easier for the average user to change the version of
Python than it is to change the CPU.

Nobody denies that Python code running with no optimization tricks is
(currently) slower than compiled C code. That's a matter of objective
fact. Nobody denies that Python can be easily run in interactive mode.
Nobody denies that *at some level* Python code has to be interpreted.

But ALL code is interpreted at some level or another. And it is equally
true that at another level Python code is compiled. Why should one take
precedence over the other?

The current state of the art is that the Python virtual machine is slower
than the typical machine code virtual machine built into your CPU. That
speed difference is only going to shrink, possibly disappear completely.

But whatever happens in the future, it doesn't change two essential facts:

- Python code must be compiled to execute;
- machine code must be interpreted to execute.

Far from being indefensible, philosophically there is no difference
between the two. Python and C are both Turing Complete languages, and both
are compiled, and both are interpreted (just at different places).

Of course, the difference between theory and practice is that in theory
there is no difference between theory and practice, but in practice there
is. I've already allowed that in practice Python is slower than machine
code. But Python is faster than purely interpreted languages like bash.

Consider that Forth code can be as fast (and sometimes faster) than the
equivalent machine code despite being interpreted. I remember a
Apple/Texas Instruments collaborative PC back in the mid to late 1980s
with a Lisp chip. Much to their chagrin, Lisp code interpreted on a
vanilla Macintosh ran faster than compiled Lisp code running on their
expensive Lisp machine. Funnily enough, the Apple/TI Lisp machine sank
like a stone.

So speed in and of itself tells you nothing about whether a language is
interpreted or compiled. A fast interpreter beats a slow interpreter,
that's all, even when the slow interpreter is in hardware.

Describing C (or Lisp) as "compiled" and Python as "interpreted" is to
paint with an extremely broad brush, both ignoring what actually happens
in fact, and giving a false impression about Python. It is absolutely true
to say that Python does not compile to machine code. (At least not yet.)
But it is also absolutely true that Python is compiled. Why emphasise the
interpreter, and therefore Python's similarity to bash, rather than the
compiler and Python's similarity to (say) Java or Lisp?


-- 
Steven.



From jason.mobarak at gmail.com  Sun Feb 26 01:16:31 2006
From: jason.mobarak at gmail.com (Jason  Mobarak)
Date: 25 Feb 2006 22:16:31 -0800
Subject: Modify the local scope inside a function
References: <1140911588.659020.7640@i39g2000cwa.googlegroups.com>
Message-ID: <1140934591.462650.176800@t39g2000cwt.googlegroups.com>

Sandra-24 wrote:
> Is there a way in python to add the items of a dictionary to the local
> function scope? i.e. var_foo = dict['var_foo']. I don't know how many
> items are in this dictionary, or what they are until runtime.

Why do you want to do this?  Exec and eval should -not- be used for
this unless you are specifically creating a system allows arbitrary
code execution.  What's wrong with using a dictionary?  It's much safer
than allowing arbitrary names to be injected into a namespace.



From abhinavduggal at gmail.com  Thu Feb 16 02:46:02 2006
From: abhinavduggal at gmail.com (abhinav)
Date: 15 Feb 2006 23:46:02 -0800
Subject: web crawler in python or C?
In-Reply-To: <7xy80b96h2.fsf@ruckus.brouhaha.com>
References: <1140069412.051298.242150@g44g2000cwa.googlegroups.com>
	<7xy80b96h2.fsf@ruckus.brouhaha.com>
Message-ID: <1140075962.037640.126340@g43g2000cwa.googlegroups.com>

It is DSL broadband 128kbps.But thats not the point.What i am saying is
that would python be fine for implementing fast crawler algorithms or
should i use C.Handling huge data,multithreading,file
handling,heuristics for ranking,and maintaining huge data
structures.What should be the language so as not to compromise that
much on speed.What is the performance of python based crawlers vs C
based crawlers.Should I use both the languages(partly C and python).How
should i decide what part to be implemented in C and what should be
done in python?
Please guide me.Thanks.



From cvanarsdall at mvista.com  Wed Feb 15 15:59:03 2006
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Wed, 15 Feb 2006 12:59:03 -0800
Subject: is socket thread safe?
In-Reply-To: <dsvtn8$qvv$1@news.freedom2surf.net>
References: <1139912679.559724.131020@f14g2000cwb.googlegroups.com>
	<dsvtn8$qvv$1@news.freedom2surf.net>
Message-ID: <43F39617.9050006@mvista.com>

Steve Horsley wrote:
> e2wugui at gmail.com wrote:
>   
>> thread1:
>>     while 1:
>>         buf = s.read()
>>         process(buf)
>>
>> thread2:
>>     while 1:
>>         buf = getdata()
>>         s.write(buf)
>>
>>     
>
> It is safe, but watch out for this gotcha: If thread B calls 
> s.close() while thread A is blocked in s.read(), thread A will 
> never return from the read. My preferred solution is to set 
> socket timeout to a few seconds, and loop checking a status flag 
> so I know when to quit.
>
>   
I think a better thing would be to use something like a condition object 
to tie the two threads together and not use any polling loops.

i.e.  consumer goes to sleep while data buffer is empty, producer 
produces and signals condition object, consumer wakes up and consumes.

To take this a step further, you have a status flag that is set to 
something like QUIT or CONSUME and when the condition is triggered wake 
up, then examine the status flag to determine if the consumer should 
then quit, consume, or whatever else you'd want your consumer thread to do.


-carl



-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From kent at kentsjohnson.com  Mon Feb  6 08:14:13 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Mon, 06 Feb 2006 08:14:13 -0500
Subject: fairly large webapp: from Java to Python. experiences?
In-Reply-To: <mailman.1484.1139227848.27775.python-list@python.org>
References: <1139005746.363918.267370@g47g2000cwa.googlegroups.com>	<1139018653.508049.182020@g43g2000cwa.googlegroups.com>	<prVEf.7358$MF1.4951@fe08.lga>	<j88Ff.160530$65.4490774@twister1.libero.it>
	<mailman.1484.1139227848.27775.python-list@python.org>
Message-ID: <43e74776$1_2@newspeer2.tds.net>

Fabio Zadrozny wrote:
> I agree that python code is usually smaller... but what you did is too 
> unfair (the code below would be more suitable for the comparrison).
> 
> python:
> print "%10.2f" % 10
> 
> java:
> System.out.println(String.format("%10.2f", 10.0));

Though String.format() is new in Java 1.5 so in older code or for 
backward compatibility the longer code may be found. OTOH Python has 
supported % formatting since at least version 1.4 released in 1996.
http://www.python.org/doc/1.4/lib/node11.html#SECTION00315100000000000000

In my experience the original point is valid - Python is usually 
(always?) more concise than equivalent Java code, and often dramatically 
so. Python makes common operations easy; Java sometimes seems to go out 
of its way to make them awkward.

Kent


From steve at REMOVETHIScyber.com.au  Fri Feb  3 06:57:36 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 03 Feb 2006 22:57:36 +1100
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<donn-C3B8DF.14535302022006@gnus01.u.washington.edu>
	<1138926741.052843.169270@z14g2000cwz.googlegroups.com>
	<donn-AC8404.17325802022006@gnus01.u.washington.edu>
	<1138965780.698016.95590@o13g2000cwo.googlegroups.com>
Message-ID: <pan.2006.02.03.11.57.35.210525@REMOVETHIScyber.com.au>

On Fri, 03 Feb 2006 03:23:00 -0800, n.estner wrote:

>> That usage (self is second parameter to B.test) is bound
>> to cause trouble in general, but in this case doesn't have
>> any effect I can see.  The function call "test" would be
>> resolved from its first parameter, instance of A, and that
>> function would return 1.  One of us is missing something
>> here, could be me.
> 
> Probably my example wasn't clear, let's try another:
> 
>   class A:
>     def test(a, **kwargs): return 1
>   class B:
>     def test(b, **kwargs): return 2
>   test(a=A(), b=B())
> 
> "self" isn't a keyword, so nothing should forbid this code. What is the
> interpreter to do if it stumbles across this "test" call? 



You could try running it to see:

>>> class A:
...     def test(a, **kwargs): return 1
...
>>> class B:
...     def test(b, **kwargs): return 2
...
>>> test(a=A(), b=B())
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
NameError: name 'test' is not defined


Oops! You have defined a name "test" in two namespaces, the class A and
the class B, but there is no name "test" in the global namespace you are
trying to run it in.

Since namespaces are critical to Python, your test code is a problem that
just cannot happen in Python. It is a non-issue. Python will not get
confused between the two definitions of test.



> I mean,
> named-argument lookup is a tricky thing even if you do know what
> function you're calling. If this would depend on one of the parameters,
> I think it would become completely unintelligible. (you can think of
> more complex examples yourself)
> 
>> That's exactly the problem, it doesn't read from left to right,
>> because we swap back and forth between function(parameter and
>> parameter.function notation.
> 
> That's because they're doing two different things: object.method() does
> an attribute lookup, while function(parameter) looks for the function
> in the current scope.

No, function(parameter) does not look for a function. It looks for any
object at all, and then tries to call it.

Both calls do almost the same thing. object.method() looks up the name
"method" in the object namespace, function(parameter) looks up the name
"function" in the current namespace. Neither "method" nor "function" must
be methods or functions, although if they are not callable objects,
calling them will raise an exception. But regardless of what sort of
objects they are, the look up proceeds in the same fashion.

Unless you understand namespaces, you don't understand Python, and any
criticism is likely to be due to misunderstanding.


As near as I can tell, your original complaint might be solved simply: it
seems to me that you are concerned about that extraneous "self" parameter
for methods that don't need it:

class Foo:
    def bar(self, a,b):
        return a+b
Foo().bar(1,2) => 3

If bar doesn't need the instance or class Foo, perhaps it would be better
off as an ordinary function rather than bound to a class.

But if bar does need to be a method, perhaps you want something like this:


# for Python 2.2 and up
class Foo:
    def bar(a,b):
        return a+b
    bar = staticmethod(bar)

# for Python 2.4 and up
class Foo:
    @staticmethod
    def bar(a,b):
        return a+b

Foo().bar(1,2) works exactly the same as before, but your definition of
bar doesn't need that extraneous "self" parameter.


-- 
Steven.



From iainking at gmail.com  Thu Feb 16 10:00:47 2006
From: iainking at gmail.com (Iain King)
Date: 16 Feb 2006 07:00:47 -0800
Subject: looping over more than one list
Message-ID: <1140102047.341803.10400@g44g2000cwa.googlegroups.com>

When I loop over one list I use:

for item in items:
    print item

but often I want to loop through two lists at once, and I've been doing
this like I would in any other language - creating an index counter and
incrementing it.
For example, (completely arbitrary), I have two strings of the same
length, and I want to return a string which, at each character
position, has the letter closest to 'A' from each of the original
strings:

def lowest(s1,s2):
    s = ""
    for i in xrange(len(s1)):
        s += lowerChar(s1[i],s2[i])
    return s

this seems unpythonic, compared to something like:

def lowest(s1,s2):
    s = ""
    for c1,c2 in s1,s2:
        s += lowerChar(c1,c2)
    return s

this doesn't work - s1,s2 becomes a tuple.  Is there a way to do this
that I'm missing?  I don't see it in the docs.

This works:

def lowest(s1,s2):
    s = ""
    for c1,c2 in [x for x in zip(s1,s2)]:
        s += lowerChar(c1,c2)
    return s

but it's hardly any more elegant than using a loop counter, and I'm
guessing it's performance is a lot worse - I assume that the zip
operation is extra work?

Iain



From theller at python.net  Fri Feb  3 10:26:11 2006
From: theller at python.net (Thomas Heller)
Date: Fri, 03 Feb 2006 16:26:11 +0100
Subject: newbie - script works in PythonWin - fails from Python
References: <1138960717.927268.22640@g44g2000cwa.googlegroups.com>
	<1138961665.684357.78060@g44g2000cwa.googlegroups.com>
	<1138962543.290178.77790@g47g2000cwa.googlegroups.com>
	<pan.2006.02.03.11.04.13.213569@REMOVETHIScyber.com.au>
	<1138978837.557550.144350@f14g2000cwb.googlegroups.com>
Message-ID: <y80ssbu4.fsf@python.net>

marcus.tettmar at gmail.com writes:

> Hi,
>
> This is all I get:
>
> error 250477278
> Traceback (most recent call last):
>   File "script1.py", line 5, in ?
>     Inst = lib.Initialize(0)
> WindowsError: exception code 0xeedfade
>
> I get this when running python.exe script1.py
>
> ** When run from inside PythonWin it runs beautifully and returns with
> no errors **
>
> Regardless of what the error actually is it *works* when run from
> PythonWin.  It fails only when run from the command line.  I'm trying
> to find out why there is a difference.  Clearly both either run a
> different interpreter or with different switches.  I was hoping someone
> knows what the difference is.

One difference is that PythonWin runs a messageloop.  Does the
documentation of the library you call say something about the error code
you get?

Thomas


From mfranklin1 at gatwick.westerngeco.slb.com  Tue Feb 21 04:28:15 2006
From: mfranklin1 at gatwick.westerngeco.slb.com (Martin Franklin)
Date: Tue, 21 Feb 2006 09:28:15 +0000
Subject: Little tool - but very big size... :-(
In-Reply-To: <43FAD9E3.5010004@gmail.com>
References: <43FAD9E3.5010004@gmail.com>
Message-ID: <43FADD2F.8060601@gatwick.westerngeco.slb.com>


Durumdara wrote:
> Hi !
> 
> I have a problem.
> I have a little tool that can get data about filesystems and wrote it in
> python.
> 
> The main user asked me a GUI for this software.
> 
> This user is needed a portable program, so I create this kind of the
> software with Py2Exe.
> 
> But it have very big size: 11 MB... :-(
> 
> I need to have more compressed result. Can I compress dll-s, pyd-s with
> Py2Exe ?
> Can I decrease the total size with something ?



you could try UPX http://upx.sourceforge.net/ I think it will handle
the .pyd and dll files (it did the last time I tested it)


> 
> If not, how to I create an self-unpackager and self-starter program that
> use an temporary directory in the disk ? With WinRar ?

I may be wrong (havn't used py2exe in a while) but I think it can now
(again) create a single exe file?  Otherwise something like Inno Setup
http://www.jrsoftware.org/isinfo.php or a simple self extracting zip
file



> 
> Thanx for help:
> dd
> 
> 
> 



From jparlar at cogeco.ca  Thu Feb  9 00:36:31 2006
From: jparlar at cogeco.ca (Jay Parlar)
Date: Wed, 8 Feb 2006 21:36:31 -0800
Subject: Twisted book opinions?
Message-ID: <c6ad9ed3d5279f24699b21f819438555@cogeco.ca>

I was hoping to get some c.l.p. opinions on O'Reilly's new Twisted book.

I'm coming at Twisted as someone who's been programming mainly in 
Python for almost 6 years now, but who's never done any Twisted 
development. I've used some of its prepackaged libraries before (and 
did some custom tweaks to TwistedSNMP), but I don't really know much at 
all about Twisted fundamentals.

The few reviews on Amazon seem to imply that it's more of a cookbook. 
Would I be better off, for now, trying to get what I can from the 
twistedmatrix.com docs, and then move to the book when I'm comfortable 
with the basics? Or would the fact that I'm already pretty strong in 
Python be enough that I could start with the book?

I considered posting this to the Twisted list instead, but thought I'd 
try somewhere a little more impartial :)

Thanks in advance,
JayP.



From port001 at gentoo.org  Fri Feb 10 19:23:51 2006
From: port001 at gentoo.org (Ian Leitch)
Date: Sat, 11 Feb 2006 00:23:51 +0000
Subject: PySizeof: almost useful
Message-ID: <43ED2E97.4010703@gentoo.org>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi list,

I'm writing a little module to calculate the size of given objects, I
just need a few little pointers to get the thing into a useful shape.

Code here: http://dev.gentoo.org/~port001/Code/PySizeof/

The points I'm confused about are:

1. My method of determining the malloc() overhead is probably laughable,
what's the correct method?

2. I'm at a loss as how to calculate the size of a long object -- any tips?

3. How much memory do instance, module and instancemethod objects hold?
You'll notice I'm getting the size of most objects internal structures,
what structures' size should I be measuring for such objects?

4. When calculating the size of a dict, if it contains more than the
initial ma_smalltable size (8) should I be subtracting 8 from the len()
number multiplied with the size of a dict entry? See line 73 in pysizeof.py

No doubt there are some other glaring mistakes :)

Many thanks to anyone bored enough to review this code.

- -- Ian
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.1 (GNU/Linux)

iD8DBQFD7S6XefZ4eWAXRGIRAre2AJ4nf//qF/O9B+IhVgdQOj+1rLePZwCaAhvH
7FoGfjjhlm4bH4ZoQY+b+SA=
=C3np
-----END PGP SIGNATURE-----


From miller_ralph at sbcglobal.net  Wed Feb 15 17:34:58 2006
From: miller_ralph at sbcglobal.net (Ralph Miller)
Date: Wed, 15 Feb 2006 16:34:58 -0600
Subject: ANN:  PyIE - Python Inference Engine
Message-ID: <mailman.1997.1140099072.27775.python-announce-list@python.org>


	PyIE, Python Inference Engine, is now available at "DFWPython.org", 
under "Our Source Repository", thanks to Jeff Rush. The current revision 
is 0.9.10.

What's PyIE ?
-------------

	PyIE is an hypothesis based, agenda driven, object oriented inference 
engine written in Python. Inferencing modes include back chaining, 
opportunistic forward chaining and explicit forward chaining. The object 
base supports classes, first-class objects and multiple, dynamic 
inheritance. PyIE uses a TMS (truth maintenance system) for 
non-monotonic reasoning. All objects are first class objects and all 
values are slot values, i.e. data members attached to some object. The 
GUI uses TKinter and consists of a main control panel and seven editors 
for the agenda, classes, objects, slots, rules, methods and commands.

	The knowledge base file types are currently XML and an older 
Python-like text format. A version is associated with all .py files and 
when the KBs are saved, this current version number is saved within the 
knowledge base source files. Only the XML format supports methods and is 
the default file type.

	Knowledge is usually, but not always, expressed in rules and the 
sequencing of the inferencing is controlled by a structure called an 
agenda. The current truth-values of each clause and each rule are kept 
in an hypothesis. Rules typically contain the main expression of 
knowledge and experience. Every rule must be associated with a hypo. 
Every rule has one or more antecedent clauses, usually termed the 'left 
hand side' (lhs). Rules may also have one or more consequent clauses; 
usually termed the 'right hand side' (rhs). In order to prove the 
associated hypo true, a rule must prove all antecedent clauses true.

	A hypothesis is simply a truth-value, in PyIE one of four possible 
values: True, False, Not Known or Unknown. 'Unknown' indicates that the 
hypo has not been tested, while 'Not Known' specifies that the hypo has 
been tested but proven neither 'True' nor 'False'. The engine proves 
hypotheses taken from an agenda. The agenda is hypothesis driven, that 
is, only hypotheses are contained in the agenda, not rules. The engine 
selects the relevant hypothesis to be proved and follows a specific set 
of steps to prove the hypo. Firing rules is only one method for proving 
a hypothesis.

Download
--------

	The current PyIE may be exported from the subversion repository:
https://python.taupro.com/repo/Projects/PyIE/trunk

	Compressed gzip and zip files will be available from time to time from:
https://python.taupro.com/repo/Projects/PyIE/downloads


External Dependencies
---------------------

	PyIE relies on Python 2.3 and later and also TKinter. No other modules 
need be installed.

License
-------

	The license is MIT.

Caveats
-------

	This is a research project. The documenetation is woefully incomplete. 
'Eval' and 'compile' are used in the "KBsXML.py" module to process rules 
and methods. The underlying assumption is that there will be no 
malicious use.

Author
------

	Ralph S. Miller
	miller_ralph at sbcglobal.net


Regards,
Ralph




From exarkun at divmod.com  Thu Feb  2 12:36:16 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 2 Feb 2006 12:36:16 -0500
Subject: my openGL API need threads!!! But how to ,ake it work???
In-Reply-To: <1138901385.767694.288170@g49g2000cwa.googlegroups.com>
Message-ID: <20060202173616.2697.2052539175.divmod.quotient.4730@ohm>

On 2 Feb 2006 09:29:45 -0800, Laurent <l.exsteens at gmail.com> wrote:
>That is exactly what I do not want!!
>
>this is not transparent, I'm sure it is possible to make what I want:
>Scene = ooglScene()
>Scene.run()
>scene.append(ooglPoint())

Most concurrency is never even remotely transparent.  Stop chasing a fantasy, or start doing ground-breaking research to advance the state of the art.

Jean-Paul


From pmartin at snakecard.com  Thu Feb 23 08:30:00 2006
From: pmartin at snakecard.com (Philippe Martin)
Date: Thu, 23 Feb 2006 07:30:00 -0600
Subject: catching  traceback.print_exc()
Message-ID: <tNiLf.410464$0l5.81514@dukeread06>

Hi,

Is there a way to catch  traceback.print_exc() output into a string ?


Philippe



From vinay_sajip at yahoo.co.uk  Tue Feb  7 18:13:01 2006
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: 7 Feb 2006 15:13:01 -0800
Subject: Strange behavior with os call in cgi script
References: <1139171873.431432.195080@f14g2000cwb.googlegroups.com>
	<43e665f1$1@news.uni-ulm.de>
	<1139176638.972414.19590@g47g2000cwa.googlegroups.com>
	<tf0du1h7sn03joag0cpjkmtm6hgfg2ppnv@4ax.com>
	<mailman.1464.1139197674.27775.python-list@python.org>
	<kbceu1thb6r2trb5u78ml5m9omlbs15moe@4ax.com>
Message-ID: <1139353981.620749.254230@z14g2000cwz.googlegroups.com>

Rene Pijlman wrote:
> It struck me as somewhat complicated as well.
>
> Looking at the basic example:
> http://www.python.org/doc/2.3.5/lib/node304.html
>
> ... the things that first-time users shouldn't be bothered with IMO are:
>
> 1. Getting a logger by name from a hierarchical namespace. There should be
> a module-level log function that logs through the root logger.
> 2. Formatting the message (use a sensible default)
> 3. Adding a handler to a logger (artefact of the logging system).
> 4. Setting a log level (use a sensible default).
>
> Perhaps there should be some module-level functions that make it easier to
> 'just log this message to that file'.
>
> But I do think that adding logging to a cgi script is a sensible thing to
> do for a beginner. Getting that to run in a debugger is probably way more
> complicated.

You should look at later versions of Python - your points above about
easier configuration have already been addressed: here's a link from
the current (2.4) docs:

http://docs.python.org/lib/minimal-example.html

Regards,

Vinay Sajip



From grante at visi.com  Fri Feb  3 15:39:09 2006
From: grante at visi.com (Grant Edwards)
Date: Fri, 03 Feb 2006 20:39:09 -0000
Subject: would it be feasable to write python DJing software
References: <1138925819.465108.181760@o13g2000cwo.googlegroups.com>
	<druc1r$cre$1@bagan.srce.hr>
	<1138962918.427815.70300@g14g2000cwa.googlegroups.com>
	<drvdq6$gjq$1@bagan.srce.hr> <11u6t3qc13jplad@corp.supernews.com>
	<ds09ej$qbq$1@bagan.srce.hr>
Message-ID: <11u7frd3e5mm2f4@corp.supernews.com>

On 2006-02-03, Ivan Voras <ivoras at fer.hr> wrote:

>>>>Actually, manipulating and mixing audio samples can be both fast and
>>>>elegant, in Python, if you use Numeric or a similar library.
>>>
>>>... at which point you're actually doing it in C, not pure python... :)
>> 
>> If that's the way you want to look at it, there is nothing that
>> can be done in pure python.  
>
> I think people who say that deliberately misunderstand the
> point. Python is suitable for some things, not for others. So
> is C.

People who say what?

-- 
Grant Edwards                   grante             Yow!  Do you need
                                  at               any MOUTH-TO-MOUTH
                               visi.com            resuscitation?


From iddw at hotmail.com  Tue Feb 14 12:39:15 2006
From: iddw at hotmail.com (Dave Hansen)
Date: Tue, 14 Feb 2006 11:39:15 -0600
Subject: processing limitation in Python
References: <1139935358.128826.58660@g14g2000cwa.googlegroups.com>
Message-ID: <j244v1pppghsj961u356ac9nco8er54dt5@4ax.com>

On 14 Feb 2006 08:42:38 -0800 in comp.lang.python, "pdr14 at comcast.net"
<pdr14 at comcast.net> wrote:

>If I un-comment any line in this program below the line where I
>commented " all OK up to this point " This program locks up my
>computer.

Hmm.  Ctrl-C gets me out just fine.  In Idle, at least.

>
>Windows task manager will show "Not Responding" for Python in the
>Applications tab and in the Performance tabe the CPU usage will be
>locked at %100.

Well sure.  It's pretty busy code.

>
>I've experienced the same problem on 2 different computers, one running
>2000 pro. the other running XP home eddition.  both computers run
>Python 2.4.2
>
>I'm just wondering if any one else has noticed any problems with
>working with large numbers in Python ind if there is anything that can
>work around this issue.

Try running with the changes I've made below, and see if that tells
you anything.

def factor(n):
    d = 2
    pctr = 0
    factors = [ ]
    while n > 1:
        if n % d == 0:
            factors.append(d)
            n = n/d
        else:
            d = d + 1
            pctr += 1
            if pctr >= 1000000:
                print "So Far: " + str(factors)
                pctr = 0
    print factors
factor (12)
factor (123)
factor (1234)
factor (12345)
factor (123456)
factor (1234567)
factor (12345678)
factor (123456789)
factor (1234567898)
factor (12345678987)
factor (123456789876)
factor (1234567898765)       # all OK up to this point
factor (12345678987654)    # locks up computer if I run this line
#factor (123456789876543)
#factor (1234567898765432)
#factor (12345678987654321)


Hint: 2057613164609L is a Really Big Number (tm).  If it's prime (I
don't know if it is or not), it will take more than 46 days on my
computer to figure that out.  Did you wait that long?

Regards,
                                        -=Dave

-- 
Change is inevitable, progress is not.


From eoinrogers at gmail.com  Sun Feb  5 12:33:15 2006
From: eoinrogers at gmail.com (Byte)
Date: 5 Feb 2006 09:33:15 -0800
Subject: Learning Python
In-Reply-To: <1139159843.488988.279770@g43g2000cwa.googlegroups.com>
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
	<1139156577.897100.69140@g43g2000cwa.googlegroups.com>
	<mailman.1439.1139157505.27775.python-list@python.org>
	<1139158796.288778.244000@z14g2000cwz.googlegroups.com>
	<ds5c0n$cej$2@aphrodite.grec.isp.9tel.net>
	<1139159843.488988.279770@g43g2000cwa.googlegroups.com>
Message-ID: <1139160795.149427.120760@g44g2000cwa.googlegroups.com>

>parse the expression, extract the operands and the operation, apply the
operation to the operands

How? Give me some example code, but please keep it simple.

>are you trying to code a calculator?

Not intending to, just trying to learn Python. Suppose what i'm trying
to code is a but like a CLI calculator, but i'm just writing it for my
own educational beifits.



From benji at benjiyork.com  Sat Feb 18 22:05:52 2006
From: benji at benjiyork.com (Benji York)
Date: Sat, 18 Feb 2006 22:05:52 -0500
Subject: define loop statement?
In-Reply-To: <lW4Jf.31559$3V4.8390@trnddc06>
References: <lW4Jf.31559$3V4.8390@trnddc06>
Message-ID: <43F7E090.50200@benjiyork.com>

David Isaac wrote:
> I would like to be able to define a loop statement
> (nevermind why) so that I can write something like
> 
> loop 10:
>     do_something

Here's a flagrant hack:

import sys

VAR_NAME = '__repeat_counter'

def set_repeat_counter(value):
     frame = sys._getframe(2)
     frame.f_locals[VAR_NAME] = value

def get_repeat_counter(value):
     frame = sys._getframe(2)
     if VAR_NAME not in frame.f_locals:
         frame.f_locals[VAR_NAME] = value

     return frame.f_locals[VAR_NAME]

def repeat(limit):
     set_repeat_counter(get_repeat_counter(limit)-1)
     return get_repeat_counter(limit)

while repeat(10):
     print 'OK'

Without more work it doesn't allow nested loops though.

And for the record, if you're worrying about Python's counted loop 
construct you need better things to worry about. 
<insert-smilies-as-appropriate>
--
Benji York


From fuzzyman at gmail.com  Mon Feb  6 06:08:33 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 6 Feb 2006 03:08:33 -0800
Subject: would it be feasable to write python DJing software
In-Reply-To: <ds3cpg$mo6$1@bagan.srce.hr>
References: <1138925819.465108.181760@o13g2000cwo.googlegroups.com>
	<drvf4m$t79$1@bagan.srce.hr>
	<mailman.1380.1138967196.27775.python-list@python.org>
	<ds3cgf$r61$1@bagan.srce.hr> <ds3cpg$mo6$1@bagan.srce.hr>
Message-ID: <1139224113.713168.168700@z14g2000cwz.googlegroups.com>


Ivan Voras wrote:
> Ivan Voras wrote:
>
> > Because "bar and aba happen to be parts of extension library" :)
>
> To end this disussion: I meant "doing it in C" as a colloquial
> expression, not a technical one. The expression holds true for every
> case where a function/class/module/etc is implemented in a lower-level
> language, and "C" was used only as an example.

I think the point we were trying to make, is that even in 'colloquial
terms' there is *no difference* between using a part of the standard
library (e.g. the builtin module md5) and a third party extension
module written in C.

All the logic you actually write is in pure python.

If you write *your own extension module* in C, then you could rightly
be described as doing it in C.

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml



From steve at holdenweb.com  Wed Feb 22 15:01:39 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 22 Feb 2006 15:01:39 -0500
Subject: a little more help with python server-side scripting
In-Reply-To: <Lc0Lf.1652$No6.38850@news.tufts.edu>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<Lc0Lf.1652$No6.38850@news.tufts.edu>
Message-ID: <dtifv2$ed3$1@sea.gmane.org>

John Salerno wrote:
> John Salerno wrote:
> 
>>I contacted my domain host about how Python is implemented on their 
>>server, and got this response:
> 
> 
> Uh, okay, I asked a related question to them and now I got this:
> 
> ------------
> Hello John,
> 
> There are some corrections based on last reply.
> 
> The python installation on our windows hosting is not configured as 
> mod_python. Howevet, it is directly map with a website extensions 
> mapping in IIS. Save your python script as .py file on the wwwroot and 
> you may call the scripts using http://www.yourdomain.com/yourfile.py
> 
> If you have any enquiries, please do not hesitate to contact.
> 
> Best regards,
> 
> Mackenzie S.
> Support Executive
> -----------
> 
> Does that really change anything?
> 
Well, it means that PSP is out, unfortunately.

> What I had asked was if I could just embed Python code within my HTML 
> files, like you do with PHP, but they didn't address that yet.

OK, what you need to ask them is whether they have installed Python as 
an Active Scripting language. If they have then you can use it pretty 
much like VBscript.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From skip at pobox.com  Wed Feb  8 12:57:00 2006
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 8 Feb 2006 11:57:00 -0600
Subject: apostrophe or double quote?
In-Reply-To: <1139413150.237052.47320@o13g2000cwo.googlegroups.com>
References: <1139370460.360400.232500@z14g2000cwz.googlegroups.com>
	<mailman.1589.1139373128.27775.python-list@python.org>
	<oIE*M4N+q@news.chiark.greenend.org.uk>
	<1139413150.237052.47320@o13g2000cwo.googlegroups.com>
Message-ID: <17386.12524.935119.641171@montanaro.dyndns.org>

Just to present a complete picture, not mentioned in this thread are
triple-quoted strings:

    'abc' == '''abc''' == "abc" == """abc"""

Triple-quoted strings are no different than regular strings, though they do
allow literal newlines to be embedded in the string.  Their presence is most
often detected in doc strings precisely for this reason.

Skip


From grante at visi.com  Fri Feb  3 10:30:26 2006
From: grante at visi.com (Grant Edwards)
Date: Fri, 03 Feb 2006 15:30:26 -0000
Subject: would it be feasable to write python DJing software
References: <1138925819.465108.181760@o13g2000cwo.googlegroups.com>
	<druc1r$cre$1@bagan.srce.hr>
	<1138962918.427815.70300@g14g2000cwa.googlegroups.com>
	<drvdq6$gjq$1@bagan.srce.hr>
	<1138966084.385205.254410@g14g2000cwa.googlegroups.com>
Message-ID: <11u6toijlcufs8d@corp.supernews.com>

On 2006-02-03, Fuzzyman <fuzzyman at gmail.com> wrote:

> Come to that, you're **really** doing it in machine code...

And probably not the machine code emitted by the assembler but
rather the actual micro-code that's implemented in hardware
that's running a program that implements the VM for the machine
code emitted by the assemblers.

Hell, from the Python point of view it might as well be
tortoises all the way down.

-- 
Grant Edwards                   grante             Yow!  Dehydrated EGGS are
                                  at               STREWN across ROULETTE
                               visi.com            TABLES...


From me at privacy.net  Thu Feb 16 15:21:24 2006
From: me at privacy.net (Charles)
Date: Thu, 16 Feb 2006 17:21:24 -0300
Subject: mod_python and open HTTP connection
Message-ID: <op.s421hyqcix6gqv@charles>

Hello, I'm think about using mod_python for a project but I need to make  
sure: Does mod_python time out after a minute ? (I hope not). If I leave  
an HTTP connection open so that the content keeps loading inside the  
browser window indefinately, and if I close the browser window, the  
mod_python process is terminated, right?
Thanks,

-- 
Charles.

Desenvolvimento e cria??o de sites: www.auriance.com
Hospedagem de sites e servidores dedicados: www.auriance.net


From sybrenUSE at YOURthirdtower.com.imagination  Tue Feb 14 06:06:11 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Tue, 14 Feb 2006 12:06:11 +0100
Subject: Python / Apache / MySQL
References: <1139907519.427789.188760@g14g2000cwa.googlegroups.com>
	<slrndv38ti.7rh.sybrenUSE@schuimige.unrealtower.org>
	<0001HW.C01764D700060858F0407550@news.individual.de>
	<43f1aebb$0$1728$636a55ce@news.free.fr>
	<0001HW.C01772E1000952B1F0407550@news.individual.de>
Message-ID: <slrndv3ed3.9cm.sybrenUSE@schuimige.unrealtower.org>

Kalle Anke enlightened us with:
> What about speed? I've always had the impression that while
> PostgreSQL is more complete than MySQL it's also slower.

For simple queries, I believe (no real knowledge here) MySQL is indeed
faster. One of the problems I have with MySQL is that it doesn't
support foreign keys nor transactions on the default table format.

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From nospamformeSVP at gmail.com  Wed Feb 22 18:38:26 2006
From: nospamformeSVP at gmail.com (Don Taylor)
Date: Wed, 22 Feb 2006 18:38:26 -0500
Subject: Newbie question: Multiple installations of Python on Windows
	machines
In-Reply-To: <1140642974.386791.107270@o13g2000cwo.googlegroups.com>
References: <mailman.2185.1140472875.27775.python-list@python.org>	<1140519304.913540.296600@g14g2000cwa.googlegroups.com>	<mailman.2313.1140642001.27775.python-list@python.org>
	<1140642974.386791.107270@o13g2000cwo.googlegroups.com>
Message-ID: <dtisln$tqr$1@sea.gmane.org>

Fuzzyman wrote:

> 
> It means installing a compiler (but I don't see a way around that) -
> but this worked for me :
> 
>     http://www.vrplumber.com/programming/mstoolkit/index.html
> 
> So long as the module can be installed with distutils, the instuctions
> there will work for you. Hefty download though.
> 

Oh, I was not expecting something like this.

I wonder if anyone has tried the newish free Visual Studio 2005 Visual 
C++ Express insatll instead of all of the stuff that this link calls for 
plus mods to distutils.

I suppose that it would too much to hope for.

Ah well.

Don.



From peter at engcorp.com  Fri Feb 17 19:12:01 2006
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 17 Feb 2006 19:12:01 -0500
Subject: commenting out blocks of code
In-Reply-To: <20060217231846.87613.qmail@web36708.mail.mud.yahoo.com>
References: <20060217231846.87613.qmail@web36708.mail.mud.yahoo.com>
Message-ID: <dt5ooi$m4a$1@sea.gmane.org>

john peter wrote:
> is there a similar mechanism in python, other than prefixing
> the '#' character to the start of each statement i do  not
> want to execute (which gets old very quickly if one needs to
> comment and uncomment several statements a couple of
> times while "playing around with code" say during initial design)?

In addition to the approach Paul has suggested, you should also consider 
using a better editor, as most decent editors should have some kind of 
"block comment/uncomment" feature that prevents that operation from 
getting old very quickly...

Scite, for example, lets me selected a block and hit Ctrl-Q to either 
comment or uncomment the block.  (It does this by prefixing each line 
with #~ instead of just #, which allows it to detect when a line is 
already so commented and reverse the operation.)  Other decent editors 
have their own approach.

-Peter



From sbaush at gmail.com  Mon Feb  6 12:35:25 2006
From: sbaush at gmail.com (Sbaush)
Date: Mon, 6 Feb 2006 18:35:25 +0100
Subject: problem in ElementTree SubElement
Message-ID: <fc5d4c490602060935l4c74efecl@mail.gmail.com>

Hi all.
I would get this element in xml:

<date month="02" day="06"  />

I have write this:

date=ET.SubElement(idsreq,"date")
        date.set("month",month)
        date.set("day",day)

but i get this:

<date day="06" month="02" />

The attributes are not in my order!!
how i can get the attributes in right order???
Thanks all.

--
Sbaush
-------------- next part --------------
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From oddr at home.no.no  Fri Feb 24 04:57:58 2006
From: oddr at home.no.no (Odd-R.)
Date: 24 Feb 2006 09:57:58 GMT
Subject: Exception-handling
Message-ID: <slrndvtm56.9s5.oddr@apal.ii.uib.no>

I have come over a strange problem regarding exceptions
This is my code:

try:
  #some operation
except Exception, info:
  #some message
except:
  #??

When executing my code, I get to the last block here. This
I find rather strange, because I thought Exception would catch
all exceptions. But this is obviously not the case here.

What is this, and how can I get a hold of what causes the exception?

Thanks!



-- 
Har du et kj?leskap, har du en TV
s? har du alt du trenger for ? leve

-Jokke & Valentinerne


From rtilley at vt.edu  Mon Feb 20 18:32:46 2006
From: rtilley at vt.edu (rtilley)
Date: Mon, 20 Feb 2006 18:32:46 -0500
Subject: urllib2 auth error
Message-ID: <dtdjgk$5of$1@solaris.cc.vt.edu>

I get this error:

HTTP Error 401: Authorization Required

When I do this:

try:
     handler = urllib2.HTTPBasicAuthHandler()
     handler.add_password('realm', 'website', 'user', 'pass')
     opener = urllib2.build_opener(handler)
     urllib2.install_opener(opener)
     f = urllib2.urlopen('http://website')
     print f.read()
     f.close()
except Exception, e:
     print e

I have the right username and password. I may be using the above code 
wrong. Any tips?

Thanks,
Brad


From claudio.grondi at freenet.de  Sat Feb 25 16:16:55 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Sat, 25 Feb 2006 22:16:55 +0100
Subject: Is Python a Zen language?
In-Reply-To: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
Message-ID: <dtqhes$2jn$1@newsreader3.netcologne.de>

John Coleman wrote:
> Greetings,
>    I have a rough classification of languages into 2 classes: Zen
> languages and tool languages. A tool language is a language that is,
> well, a *tool* for programming a computer. C is the prototypical tool
> language. Most languages in the Algol family are tool languages. Visual
> Basic and Java are also tool languages. On the other hand, a Zen
> language is a language which is purported to transform your way of
> thinking about programming. Lisp, Scheme, Forth, Smalltalk and (maybe)
> C++ are Zen languages. Disciples acknowledge that it is difficult to
> pick up these languages but claim that, if you persevere, you sooner or
> later reach a state of computational satori in which it all makes
> sense. Interestingly enough, these languages often have books which
> approach scriptural status  e.g. SICP for Scheme.
> 
> So (assuming my classification makes sense)  which is Python? The
> emphasis on simplicity and the beginner-friendly nature of it seems to
> put it in the tool category. On the other hand, the emphasis on the ONE
> TRUE WAY to accomplish most tasks and the tendency for participants in
> this newsgroup to criticize one another's code as being "unpythonic"
> seems to move it towards the Zen category. Of course, even tool
> languages have their idioms which the novice needs to pick up, so maybe
> this isn't decisive, but I detect an element of zeal in this newsgroup
> that I don't detect in (say) Excel VBA programming newsgroups.
> 
> No value judgement is intended by my classification. There is no
> denying that Zen languages are often very powerful tools (for those who
> have reached satori) and that there is a Zen to really mastering, say,
> C. Personally, I have never been able to master any Zen language but
> can pick up tool languages fairly quickly, so I prefer tool languages.
> This is probably because I am not a programmer (I'm a mathematician who
> likes to program as a hobby and for numerical simulations) and so don't
> have the time to invest in picking up a Zen language. Hard-core hackers
> might presumably lean towards the Zen languages.
> 
> Just curious
> 
> -John Coleman
> 
I was lately involved in some very long threads trying to answer the 
question what a simple assignment operator does and what is behind a 
Python identifier (variable).

In the context of the above mentioned experience I agree with the 
notion, that from the beginner point of view, as long as there is no 
need to get deep understanding what goes on behind the scenes, Python is 
a tool.

At that moment, when it becomes necessary to optimize the code for speed 
and understand the exact details of what is going on behind the scenes 
Python turns into a mystery which needs time, effort and ability to 
grasp new concepts in order to gain control over it, i.e. Python reveals 
its Zen character.

In this context it appears to me worth to mention, that in my eyes a 
'pythonic' way of programming has not necessarily something to do with 
the Python language itself.
Even if it is sure better to use  Python for 'pythonic' way of 
programming, it can also be done using any other programming language.
I assume, that many of todays advanced Python users were already aware 
of the 'pythonic' way of programming long before they started to use 
Python. In Python they found many of the tools they have developed for 
themselves over the time already built-in and even some more, so they 
embraced it as programming language of their choice and coined the way 
it helps to code ideas as 'pythonic' way of programming.
This is in my eyes the reason why 'pythonic' way of programming can 
usually be fully understood only by very experienced programmer who 
already went all the stages through many other programming languages to 
Python and use it where it is appropriate being at the same time aware, 
that there are purposes for which Python is not the way to go and being 
aware which problems other programming languages have were solved by the 
design of the Python language.
So 'pythonic' way of programming has only a meaning for an _experienced 
programmer_ as intuitively easy to understand and in different context 
easy to reuse way of programming where the initial idea must not be 
bended to fit into the programming language, but where the programming 
language provides by own design some aid in expressing it.

I don't see how Microsoft Visual Basic fits into the category of tool 
languages. As MS-DOS Quick Basic surely do, Visual Basic/Visual C++ need 
a total new understanding of programming and belong due to the very hard 
to grasp event driven way not allowing any workaround it to the category 
of Zen languages. There is the 'hidden' event handling and the way from 
the GUI to the code and not other way what makes Visual Basic in my eyes 
a Zen language where Basic, Algol, Fortran, C are tools.

If it makes sense to speak about tool and Zen languages at all, I will 
draw the line between the two categories depending on the amount of from 
the programmer hidden amount of code added to his own code in order to 
make the program run.
Assembler, as it runs entirely as it is written is sure a tool.
C/C++ is also a tool, as long as it does not extensively use large 
libraries providing special functionality.
Usage of for example C++ build upon the MFC library (Microsoft 
Foundation Class) makes in my eyes C++/MFC a kind of Zen language out of 
a C++ tool.
Forth belongs according to this definition to the category of Zen 
languages not because it is so different, but, because you have to track 
in own mind, that behind the scenes the next command will use what was 
put on the stack before, what makes part of the processing done 'hidden' 
behind the scenes.

 From the experience of the in another thread currently going on hot 
discussion about Python and Lisp I draw the conclusion, that it is from 
todays point of view not easy to draw exact lines between the categories 
like tool/Zen, interpreted/compiled language.
In between even making a difference between software/hardware appears to 
me problematic.

Claudio


From luis.armendariz at gmail.com  Wed Feb 15 17:47:57 2006
From: luis.armendariz at gmail.com (luis.armendariz at gmail.com)
Date: 15 Feb 2006 14:47:57 -0800
Subject: Attached images by plain email.
In-Reply-To: <1140037314.129890.135970@o13g2000cwo.googlegroups.com>
References: <1140037314.129890.135970@o13g2000cwo.googlegroups.com>
Message-ID: <1140043677.756437.315080@g14g2000cwa.googlegroups.com>

Hi Gaz,

Perhaps this will help?

   http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52243



From vishalm1975 at gmail.com  Wed Feb 22 10:01:34 2006
From: vishalm1975 at gmail.com (vishalm1975 at gmail.com)
Date: 22 Feb 2006 07:01:34 -0800
Subject: can't use NetcdfFile
Message-ID: <1140617998.563835.136220@g43g2000cwa.googlegroups.com>

Hi,
I'm trying to open a Netcdf file using NetcdfFile but I always get an
import error DLL failed
even though I've tried using all these:

import Numeric
from Scientific.IO.NetCDF import NetCDFFile
from Scientific.IO import NetCDF
from Scientific import *
from Scientific.IO.NetCDF import *

I've got Scientific,Numeric and numpy installed
I'd appreciate anyone's help

Thanks
Vishal.



From rainbow.cougar at gmail.com  Mon Feb 20 12:51:40 2006
From: rainbow.cougar at gmail.com (rainbow.cougar at gmail.com)
Date: 20 Feb 2006 09:51:40 -0800
Subject: editor for Python on Linux
In-Reply-To: <dtcqa0$adv$1@ariane.blic.net>
References: <dtai6e$23m$2@ariane.blic.net><dtcqa0$adv$1@ariane.blic.net>
Message-ID: <1140457900.354733.179780@g43g2000cwa.googlegroups.com>


Mladen Adamovic wrote:
> Mladen Adamovic wrote:
> > I wonder which editor or IDE you can recommend me for writing Python
> > programs. I tried with jEdit but it isn't perfect.
>
> I've got a lot of replies on this message.
> In jEdit auto ident don't work OK.
>
> Answers like vi, emacs and gedit I won't take seriously.
> For gods sake, gedit don't even have syntax highlighting (at least on
> Centos 4.2).

Actually gedit does have syntax highlighting and works quite well.
If you put down emacs so casually you obviously have no experience with
one of the most powerful text editors available. I don't use because I
like the X windows editors more.

Basically any editor that can insert spaces for tabs and maintain
indentation level works well.

For Unices:
I like cooledit, besides syntax highlighting for a variety of
languages, it uses python as its internal scripting language and has a
powerful indent/undent feature.

xcoral is good, another highly configurable editor.

gedit

idle

ee (also know as aee) works pretty decently for maintaining tabbing

vi (*not* vim, which is a travesty that doesn't even work right) if
nothing else is available

For M$:
Idle
PFE
vim



From nephish at xit.net  Mon Feb  6 13:43:40 2006
From: nephish at xit.net (nephish at xit.net)
Date: 6 Feb 2006 10:43:40 -0800
Subject: in over my head ascii
References: <1139245216.350356.272170@z14g2000cwz.googlegroups.com>
	<sk4fu1ljvt7h7d6euj7nq06e1e0ml8p8u5@4ax.com>
Message-ID: <1139251420.501345.91850@g44g2000cwa.googlegroups.com>

i think like byte 1 = 'S'
byte 2 = 'T'
and byte 3 = 'X'

still new at this, and thanks for the references

-sk



From john_zenger at yahoo.com  Sat Feb 18 16:41:58 2006
From: john_zenger at yahoo.com (John Zenger)
Date: Sat, 18 Feb 2006 16:41:58 -0500
Subject: Tab Character?
In-Reply-To: <1140298494.225985.103510@g47g2000cwa.googlegroups.com>
References: <1140298494.225985.103510@g47g2000cwa.googlegroups.com>
Message-ID: <2KadnUmb69Y3CWrenZ2dnUVZ_tSdnZ2d@comcast.com>

Tab is \t .  As in:

print "coke\tpepsi"
tsvline.split("\t")

tbonejo at gmail.com wrote:
> How do I make a tab character in code to split a line read with tabs in
> it?
> 
> 
> Thanks.
> 
> Tom
> 


From jstroud at ucla.edu  Thu Feb  9 21:01:20 2006
From: jstroud at ucla.edu (James Stroud)
Date: Thu, 09 Feb 2006 18:01:20 -0800
Subject: Simple Tkinter app works in Linux, not in Windows
In-Reply-To: <1139531183.792405.148600@o13g2000cwo.googlegroups.com>
References: <1139531183.792405.148600@o13g2000cwo.googlegroups.com>
Message-ID: <dsgs5g$d4f$1@daisy.noc.ucla.edu>

john.orlando at gmail.com wrote:
> Hello,
> I'm a newbie to Python (literally, within the last two weeks), and I am
> playing around with Tkinter to build some simple GUIs.  I am attempting
> to build a simple class that displays a GIF.  Here is the code:
> 
> #start of code
> from Tkinter import *
> 
> class DisplayPict(Frame):
> 
>     def __init__(self,parent=None):
>         Frame.__init__(self,parent)
>         self.pack()
>         self.img=PhotoImage(file="moon.gif")
>         self.can=Canvas(self)
>         self.can.create_image(2,2,image=self.img,anchor=NW)
>         self.can.pack(fill=BOTH)
> 
>         #keep a reference to the img around
>         self.can.photo=self.img
> 
> if __name__ == '__main__': DisplayPict().mainloop()
> #end of code
> 
> Anyway, I started with this code in Windoze using IDLE, and everytime I
> ran it I kept getting an empty frame (well, presumably with a Canvas
> that had nothing in it).  I kept thinking that it had to be something
> to do with the whole images-get-garbage-collected-if-not-referenced
> issue that I read so much about.  So I tried a bunch of different
> permutations and nothing made a difference.
> 
> On a whim, I tried this code under Linux, and amazingly, it worked just
> fine: the image was displayed as expected.
> 
> So...I am confused.  I tried to do my homework (i.e., read through
> "Programming Python", "Learning Python", and scouring the internet),
> but I can't come up with an explanation as to why this doesn't work
> under Windoze.  Can anyone out there show me the error in what I have?
> 
> Thanks in advance,
> John O
> 

I'm inclined to think that its your python installation. It worked for 
me with both the cygwin python (both in the console and in an xterm) and 
it also worked for me with idle using enthought python. I haven't tried 
the active state python.


From grante at visi.com  Sat Feb 25 07:58:41 2006
From: grante at visi.com (Grant Edwards)
Date: Sat, 25 Feb 2006 12:58:41 -0000
Subject: Multiple threaded download streams?
References: <1140867665.749334.210370@v46g2000cwv.googlegroups.com>
Message-ID: <1200l41lq3dgu73@corp.supernews.com>

On 2006-02-25, gjzusenet at gmail.com <gjzusenet at gmail.com> wrote:

> Though Python supports threading, I think it is limited to
> python code - as soon as you issue a command that uses an
> external (C?) module, all of your python threads hang until
> this command returns. Is that true?

No.  Not unless the C modules is broken.

> I'm using urllib2 to download many files, and I have a double
> problem:
>
> 1. downloading all of them is painfully slow since it's serial
>    - one has to finish before the next request gets sent.

Then don't do it that way.

> 2. my GUI becomes non responsive during the downloads - major
>    problem!

Use a separate thread for downloading.

> Is there any way to work around that?

Yes.  Use threads.

> I want to run multiple download streams, in parallel, and while keeping
> my program responsive.

Then do it that way.

> Are there alternative modules that I can use for that?

And what, exactly, didn't work right when you tried the
threading module?

-- 
Grant Edwards                   grante             Yow!  I demand IMPUNITY!
                                  at               
                               visi.com            


From durumdara at gmail.com  Mon Feb  6 06:13:13 2006
From: durumdara at gmail.com (Durumdara)
Date: Mon, 06 Feb 2006 12:13:13 +0100
Subject: How to I write DBASE files without ODBC
Message-ID: <43E72F49.9090306@gmail.com>

Hi !

I have a text processor code and I want to put the results to standard 
files.
HTML, XML, SQLite - they are ok.

But I want to put these datas to DBF too, because when records are many, 
does not fit in Excel table (load from HTML). XML and SQLite need some 
development to get datas.

I need some memo fields, not only standard field types. The fixed DBASE 
tables are simply writeable, but for memo I need some tool.
ODBC is good for this, but I want to create standalone exe, without 
installation, and ODBC must be manually set...

Can anybody known about DBASE handler module for Python ?

Thanx for help: dd





From arutz at mimoza.pantel.net  Thu Feb  2 15:51:17 2006
From: arutz at mimoza.pantel.net (Antal Rutz)
Date: Thu, 02 Feb 2006 21:51:17 +0100
Subject: Collecting snmp data - threads, processes, twisted?
Message-ID: <43E270C5.6030601@mimoza.pantel.net>

Hi all,

I'd like to collect snmp data from varoius network devices parallel.

First I tried with my own threadpool class then I gave a try
to Christopher Arndt's threadpool.py 
(http://chrisarndt.de/en/software/python/threadpool.html).

I got the same result: with one thread it finished about 2 mins
with more threads it needed more and more time.

Maybe I ran into the situation where threads aren't the best.
I use yapsnmp (fair easy to 'snmpwalk') for collecting.
it uses net-snmp.

Could you give me some advice how can I make my script really parallel?

My options maybe:
1. pySNMP (as it's full in python)
2. subprocess (I'd like to make (find) a solution as threadpool.py)
    (running yapsnmp, pySNMP or even net-snmp?...)
3. TwistedSNMP (seems too weird for me.. cannot imagine a simple 
solution for my problem)
4. ...

thanks for your help

-- 


--arutz


From steve at REMOVETHIScyber.com.au  Tue Feb 14 07:09:43 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Tue, 14 Feb 2006 23:09:43 +1100
Subject: file names longer than MAX_PATH under Windows 2003
References: <dssev8$tr5$1@news.rtcomm.ru>
	<pan.2006.02.14.11.43.48.318400@REMOVETHIScyber.com.au>
Message-ID: <pan.2006.02.14.12.09.41.447607@REMOVETHIScyber.com.au>

On Tue, 14 Feb 2006 22:43:50 +1100, Steven D'Aprano wrote:

> On Tue, 14 Feb 2006 14:29:44 +0300, Sergey wrote:
> 
>> Hello.
>> 
>> I try to open file with pathname length 282 bytes:
>> E:\files\..................\something.dat
>> 
>> On MSDN (http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/fs/naming_a_file.asp) described method to access 
>> files with path length
>> up to 32000 bytes: just add prefix \\?\ to file name.
>> But when I try to pass prefixed name to file(), I get the same result as when I don't add the prefix: file not found. May be Python 
>> just doesn't support long unicode filenames?
>> Is there way to open such files?
> 
> Backslashes have special meaning to Python and need to be escaped. If you
> do this:
> 
> f = file("E:\files\...\something.dat", "r")
> 
> Python's string escape rules means you are actually trying to open the
> file "E:files...something.dat" which doesn't exist.

[slaps head]
I seem to be a bit confused about string escaping rules. Only some
backslashes have special meaning, the rest remain in the string.

Sergey, you said UNICODE file names. Not just ordinary strings.

Are you passing a unicode object to the function?

f = file(u"E:\\files\\...\\something.dat", "r")


-- 
Steven.



From john at totalrekall.co.uk  Mon Feb  6 06:02:56 2006
From: john at totalrekall.co.uk (John Dean)
Date: Mon, 6 Feb 2006 11:02:56 GMT
Subject: Python V2.4.2 source code
References: <43e710de$0$23286$db0fefd9@news.zen.co.uk>
	<mailman.1471.1139217340.27775.python-list@python.org>
Message-ID: <43e72b68$0$29572$da0feed9@news.zen.co.uk>

Hi

That particular file doesn't include the implementation files for the core
modules. The platform specific directories only include two or three files.
Only the Mac directory contains any C code files

-- 
Best Regards
John


From ptmcg at austin.rr._bogus_.com  Fri Feb 10 08:55:37 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Fri, 10 Feb 2006 13:55:37 GMT
Subject: Create dict from two lists
References: <1139579518.129742.265680@o13g2000cwo.googlegroups.com>
Message-ID: <tX0Hf.12441$7y1.9698@tornado.texas.rr.com>

"py" <codecraig at gmail.com> wrote in message
news:1139579518.129742.265680 at o13g2000cwo.googlegroups.com...
> I have two lists which I want to use to create a dictionary.  List x
> would be the keys, and list y is the values.
>
> x = [1,2,3,4,5]
> y = ['a','b','c','d','e']
>
> Any suggestions?  looking for an efficent simple way to do this...maybe
> i am just having a brain fart...i feel like this is quit simple.
>
> thanks.
>


>>> x = [1,2,3,4,5]
>>> y = ['a','b','c','d','e']
>>> dict(zip(x,y))
{1: 'a', 2: 'b', 3: 'c', 4: 'd', 5: 'e'}

-- Paul




From rtilley at vt.edu  Mon Feb 27 10:54:31 2006
From: rtilley at vt.edu (rtilley)
Date: Mon, 27 Feb 2006 10:54:31 -0500
Subject: spaces at ends of filenames or directory names on Win32
In-Reply-To: <1140897423.932377.304640@i39g2000cwa.googlegroups.com>
References: <dtkuav$keb$1@solaris.cc.vt.edu>
	<1140897423.932377.304640@i39g2000cwa.googlegroups.com>
Message-ID: <440320B7.3010909@vt.edu>

drobinow at gmail.com wrote:
>  Please post your Python code.  I don't see the problem you're
> describing.

OK, here's a copy. This works on Mac/Unix/Linux yet has no effect on 
Windows:

-----------------------------------------------------------------
import os
import os.path

for root, dirs, files in os.walk(os.getcwd()):
     for d in dirs:
         new_d = d.strip()

## Uncomment the next 4 lines just to print dirs with end spaces.
##        if new_d != d:
##            print d
##        else:
##            print "No end spaces."

## Uncomment the next 7 lines to try a rename of dirs with end spaces.
##        if new_d != d:
##            try:
##                new_path = os.path.join(root, new_d)
##                old_path = os.path.join(root, d)
##                os.renames(old_path, new_path)
##            except Exception, e:
##                print e
------------------------------------------------------------------


From peter at engcorp.com  Sat Feb 18 09:47:49 2006
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 18 Feb 2006 09:47:49 -0500
Subject: Difference: __iadd__ and __add__
In-Reply-To: <1140242247.989089.43460@f14g2000cwb.googlegroups.com>
References: <pdlcv1lcroqifqcsjjjj3s4dtki3n1a5df@4ax.com>	<1140228134.408383.182270@o13g2000cwo.googlegroups.com>
	<1140242247.989089.43460@f14g2000cwb.googlegroups.com>
Message-ID: <dt7c2o$mke$1@sea.gmane.org>

Jonathan Gardner wrote:
> I would like to point out that it isn't entirely obvious where to find
> documentation for this particular thing. I know from experience where
> to go, but I remember spending a long time trying to hunt this down.

I'd like to point out it should be obvious, at least as far as going to 
http://docs.python.org and typing "__iadd__" into the Search field in 
the upper right should be an obvious first step...

> For reference, you may want to check out the index of the language
> reference manual.
> 
> http://www.python.org/doc/2.4.2/ref/genindex.html

That one is the second hit in those results...

(It does seem to require reading a few of those pages to learn enough to 
answer the original question.  To be fair, I didn't find (in a few 
minutes) any page that explicitly states what tomerfiliba at gmail.com 
said, about += falling back to __add__ if __iadd__ is not defined, 
though I didn't try searching for it directly.)

-Peter



From bpeng at rice.edu  Fri Feb 24 10:59:15 2006
From: bpeng at rice.edu (Bo Peng)
Date: Fri, 24 Feb 2006 09:59:15 -0600
Subject: Module written in C does not repond to Ctrl-C interruption.
Message-ID: <dtnak6$aku$1@joe.rice.edu>

Dear list,

I have not done a thorough test, but it occurs to me that

1. python code can be interrupted by Ctrl-C.
2. A C module, if I add a main() function and run independently, can be 
interrupted by Ctrl-C.
3. If I load the C module in python and run, the program will not 
respond to Ctrl-C interruption. I have to kill python explicitly.

If this is a known behavior or just a special case of mine? Any fix to 
it? I am using python 2.3.4 under Redhat EL4 with gcc 3.3.4.

Many thanks in advance.
Bo


From grahn+nntp at snipabacken.dyndns.org  Sat Feb 11 15:00:19 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 11 Feb 2006 20:00:19 GMT
Subject: Is there any books such as 'effective python' or else about the
	performance?
References: <mailman.1738.1139652404.27775.python-list@python.org>
	<BsednUF7jNY7cXDeRVn-pA@comcast.com>
Message-ID: <slrndusfc6.2t1.grahn+nntp@frailea.sa.invalid>

On Sat, 11 Feb 2006 07:54:46 -0600, Charles Krug <cdkrug at aol.com> wrote:
> On 2006-02-11, Kenneth Xie <mailinglist4ken at gmail.com> wrote:
>> att, thx.
>
> A lot of the ideas discussed in Effective C++ et al are things that
> Python does for us already.  C++ works at a much lower layer of
> abstraction

Yes.

> and you need to deal explicitly with freestore for any
> nontrivial class.

Not true.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From aleaxit at yahoo.com  Sat Feb  4 10:33:14 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sat, 4 Feb 2006 07:33:14 -0800
Subject: OO conventions
References: <mailman.1334.1138833641.27775.python-list@python.org>
	<pan.2006.02.01.23.03.37.881298@zetafunc.net>
	<mailman.1336.1138835495.27775.python-list@python.org>
	<1138888210.827054.68690@g49g2000cwa.googlegroups.com>
	<5f56302b0602020904h4a130392kf0a8730f5a53d097@mail.gmail.com>
	<mailman.1414.1139061633.27775.python-list@python.org>
Message-ID: <1ha846s.1pnjkg2cjc961N%aleaxit@yahoo.com>

Daniel Nogradi <nogradi at gmail.com> wrote:
   ...
> So after all, what is a 'factory' or 'factory function'?

A brief explanation in Python terms is at
http://www.aleax.it/ep03_pydp.pdf -- "pages" (slides) 37-44 (the rest of
the presentation is about an even more fundamental design pattern,
"template method").  A far more extensive essay can be found, for
example, at
http://gsraj.tripod.com/design/creational/factory/factory.html -- it
names the pattern "factory method", not "factory function" ("method" is
probably a more widespread name for it) and presents examples in Java
and Corba IDL.

Anyway, trying to summarize:

- "what": any function or method or other callable whose task it
  is to build and return new objects can be called "a factory";

- sometimes a factory may get away with returning an existing
  object for recycling "as if" it was a new one, saving some
  resources, and this is one advantage;

- a factory may choose what exact type of object to build and return
  based on arguments or other circumstances, and this is a second
  advantage.

"Program to an interface, not to an implementation" -- the key
underlying principle ot the gang of 4's "Design Patterns" book.

If you build an object of a specific given type ("new Foo" in Java
or C++), you're hardwiring the choice of implementation (the
exact concrete type); delegating the building to a method or
function frees your application from such hardwiring and lets
it be concentrated (if needed at all) in one spot (the factory).
[[With the "registry" pattern you may even be able to remove
any hardwiring, but that's a pretty advanced and subtle idea]].


Alex


From girodt at gmail.com  Tue Feb 14 20:42:58 2006
From: girodt at gmail.com (Thomas Girod)
Date: 14 Feb 2006 17:42:58 -0800
Subject: listing attributes
In-Reply-To: <mailman.1901.1139928835.27775.python-list@python.org>
References: <1139884643.749492.221140@g43g2000cwa.googlegroups.com>
	<mailman.1876.1139887198.27775.python-list@python.org>
	<pan.2006.02.14.11.03.42.625075@REMOVETHIScyber.com.au>
	<mailman.1901.1139928835.27775.python-list@python.org>
Message-ID: <1139967778.838793.258190@f14g2000cwb.googlegroups.com>

You are right, using __dict__ is what i needed.

But I chose the solution explained before because i don't want to list
all attributes of the object, only attributes that are instances of the
class Property (or a subclass of it).



From mrstephengross at hotmail.com  Fri Feb 17 12:10:58 2006
From: mrstephengross at hotmail.com (mrstephengross)
Date: 17 Feb 2006 09:10:58 -0800
Subject: Another simple freeze question
Message-ID: <1140196258.624634.54210@g44g2000cwa.googlegroups.com>

Is there a user manual for freeze.py?

--Steve (mrstephengross at hotmail.com)



From johnjsal at NOSPAMgmail.com  Wed Feb 22 15:43:38 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 22 Feb 2006 20:43:38 GMT
Subject: a little more help with python server-side scripting
In-Reply-To: <mailman.2309.1140639119.27775.python-list@python.org>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>	<Lc0Lf.1652$No6.38850@news.tufts.edu>
	<mailman.2309.1140639119.27775.python-list@python.org>
Message-ID: <_14Lf.1655$No6.38835@news.tufts.edu>

Steve Holden wrote:

> OK, what you need to ask them is whether they have installed Python as 
> an Active Scripting language. If they have then you can use it pretty 
> much like VBscript.

Here's there latest:

----------
Please note that it is possible for the server to recognize bits of 
Python code that are embedded within an HTML file. However, it will need 
a custom mapping on the domain for mapping .html to the Python 
executable on the server. But note that after mapping .html will no 
longer be call as normal html file to be loaded on the browser as the 
IIS server now will parse .html with the Python executable engine. Your 
user will need to embed the Python coding into each of the .html file in 
order for it to be load properly on the browser.
------------

Does that answer the question about active scripting language?


From reply.in.the.newsgroup at my.address.is.invalid  Mon Feb 20 06:20:54 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Mon, 20 Feb 2006 12:20:54 +0100
Subject: Regular expression gone mad
References: <1140432942.392985.148820@z14g2000cwz.googlegroups.com>
Message-ID: <ab9jv15g6b93tgi3g2iba9f0il8tobg0gv@4ax.com>

fileexit:
>(Search finds nothing)
>
>>>> a=r"MemT"
>>>> pat = re.compile(a)
>>>> m=pat.search(ProcMem, re.DOTALL)
>>>> m

>From the docs:

"Compiled regular expression objects support the following methods and
attributes: 
match( string[, pos[, endpos]])"

Your re.DOTALL is seen as start position. That's why it's probably
matching 'MemFree' instead of 'MemTotal'.

-- 
Ren? Pijlman


From fn-mail at t-online.de  Sun Feb  5 11:14:33 2006
From: fn-mail at t-online.de (Florian Nykrin)
Date: Sun, 05 Feb 2006 17:14:33 +0100
Subject: Learning Python
In-Reply-To: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
Message-ID: <ds588v$6s4$02$1@news.t-online.com>

Hi Byte!

Your code should look like this:

x = raw_input('Please enter your name: ')
if x == 'myself': print 'OK'

Because myself should be a string and not a variable name, you have to 
put it in quotes.

Regards, Florian.


From kkranabetter at yahoo.com  Thu Feb  9 14:04:34 2006
From: kkranabetter at yahoo.com (Kelly)
Date: Thu, 09 Feb 2006 19:04:34 GMT
Subject: Inserting record with Microsoft Access
References: <mailman.1648.1139475091.27775.python-list@python.org>
Message-ID: <Xns976570AC4C598kkranabetter@64.59.135.159>

"jeffhg582003" <jeffhg582003 at yahoo.com> wrote in 
news:mailman.1648.1139475091.27775.python-list at python.org:

> fields. I am trying to capture the number generated from the insert 
but
> I am not exactly sure how to do that after an insert.

Other folks have pointed you to "select @@identity" but I thought I 
should mention that if you use ADO with the AddNew method then 
autonumbers are magically retrieved. Something like this should work:

rs.AddNew()
rs.Fields("somefield").Value= "Blah"
rs.Update()
print "Autonumber is", rs.Fields("TheAutonumberField").Value

This didn't always work so ADO and the MDB can't be ancient versions.

SQL Server will also do this but the recordset must be opened with:

rs.CursorLocation= constants.adUseServer
rs.Open("Tablename", conn, constants.adOpenKeyset,
        constants.adLockOptimistic)



From fredrik at pythonware.com  Sun Feb  5 11:38:55 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 5 Feb 2006 17:38:55 +0100
Subject: Learning Python
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com><ds588v$6s4$02$1@news.t-online.com>
	<1139156577.897100.69140@g43g2000cwa.googlegroups.com>
Message-ID: <ds59n0$49l$1@sea.gmane.org>

Byte wrote:

> p.s. Xavier Morel, you seem to be using Windows, not Linux

what makes you think that basic Python functions work in radically
different ways on different platforms ?

</F>





From epost2 at gmail.com  Sun Feb 12 11:51:59 2006
From: epost2 at gmail.com (epost2 at gmail.com)
Date: 12 Feb 2006 08:51:59 -0800
Subject: Newbie
References: <v3JHf.2731$lo3.2501@trnddc07>
Message-ID: <1139763119.480391.210910@g43g2000cwa.googlegroups.com>

This is a good place for posting questions about programming in python.
However, if you are a newbie, your questions are most likely already
answered. I recommend

searching in this groups archives

reading the python tutorial
http://docs.python.org/tut/tut.html

reading
http://www.byteofpython.info/read/
This one is frequently recommended for newbies:

reading
www.diveintopython.org
This book is recommended also for those who have programming
experience.

If you can`t find the answer to your question from the above, feel free
to post in this group



LittlePython skrev:
> Is this a good place to post python questions from newbie's, or would you
> suggest another board?
> Thx



From apgwoz at gmail.com  Thu Feb 16 09:34:18 2006
From: apgwoz at gmail.com (Andrew Gwozdziewycz)
Date: Thu, 16 Feb 2006 09:34:18 -0500
Subject: ANN: FreeImagePy 1.2.2
In-Reply-To: <dt223q$s9n$1@newsreader3.netcologne.de>
References: <43f43ec3$0$29107$5fc30a8@news.tiscali.it>
	<dt223q$s9n$1@newsreader3.netcologne.de>
Message-ID: <8ba244fb0602160634l799f3adevbe6e67ae9db338be@mail.gmail.com>

> Knowing some details about PIL and as good as no details about
> FreeImage, I would like in this context to become enlightened by the
> answer to the question, when does it make sense to use FreeImage instead
> of PIL?
>  From what I know up to now I can't see any use for FreeImage :-( .

both freeimagepy and freeimage are released under the GPL, PIL is not.

--
Andrew Gwozdziewycz <apgwoz at gmail.com>
http://ihadagreatview.org
http://plasticandroid.org


From erniedude at gmail.com  Tue Feb  7 16:02:18 2006
From: erniedude at gmail.com (Ernesto)
Date: 7 Feb 2006 13:02:18 -0800
Subject: tricky regular expressions
Message-ID: <1139343779.721205.221410@f14g2000cwb.googlegroups.com>

So regular expressions have been good to me so far, but now my problem
is a bit trickier.  The string I'm getting data from looks like this:

myString =
[USELESS DATA]
Request : Play
[USELESS DATA]
Title: Beethoven's 5th
[USELESS DATA]
Request : next
[USELESS DATA]
Title:  song #2
.....

I'm using this code to search myString:
....
pattern = '''(?x)
    Title:\s+(.+)
'''
Titles = re.findall(pattern, myString)

....
The problem is that I only want the "Titles" which are either:

a) Followed by "Request : Play"
b) Followed by "Request : next"

I'm not sure if I should use RE's or some other mechanism.  Thanks



From onurb at xiludom.gro  Fri Feb  3 12:47:04 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Fri, 03 Feb 2006 18:47:04 +0100
Subject: Compiling
In-Reply-To: <mailman.1390.1138988111.27775.python-list@python.org>
References: <mailman.1387.1138986082.27775.python-list@python.org>	<43e392d1$0$31853$626a54ce@news.free.fr>
	<mailman.1390.1138988111.27775.python-list@python.org>
Message-ID: <43e3972f$0$624$626a14ce@news.free.fr>

Simon Faulkner wrote:
>>> I love Python for it's ease and speed of development especially for the
>>> "Programming Challenged" like me but why hasn't someone written a
>>> compiler for Python?
>>
>>
>>
>> But there *is* a compiler for Python.
>> http://www.python.org/doc/2.4.2/lib/module-compiler.html
> 
> 
> ty Bruno, I must confes that I don't understand much of that chapter!
> 
> I will work harder... :-)
> 

Hint : You probably don't need to understand anything in this chapter.
This compiler compiles Python source code to Python bytecode, which is
then executed by the Python interpreter. You may not have noticed -
since the Python interpreter is smart enough to call the compiler when
needed - but Python is compiled to bytecode before execution. Just look
at all the .pyc files on your filesystem.

For short : this was kind of a joke... I understand that what you were
looking for is a 'native code' compiler. AFAIK, this could of course be
done, but due to Python's very dynamic nature, it's not sure this would
lead to drastically better performances.

HTH
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From nephish at xit.net  Mon Feb  6 15:13:37 2006
From: nephish at xit.net (nephish at xit.net)
Date: 6 Feb 2006 12:13:37 -0800
Subject: in over my head ascii
In-Reply-To: <1139251420.501345.91850@g44g2000cwa.googlegroups.com>
References: <1139245216.350356.272170@z14g2000cwz.googlegroups.com>
	<sk4fu1ljvt7h7d6euj7nq06e1e0ml8p8u5@4ax.com>
	<1139251420.501345.91850@g44g2000cwa.googlegroups.com>
Message-ID: <1139256817.218319.160370@f14g2000cwb.googlegroups.com>

ok, part of what i have to do is know how many bytes will be sent. in
ascii is it one byte per character ?
like "password" would be 8 bytes long?



From paul at boddie.org.uk  Fri Feb  3 13:03:08 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 3 Feb 2006 10:03:08 -0800
Subject: Compiling
References: <mailman.1387.1138986082.27775.python-list@python.org>
	<1138989575.503830.197820@g47g2000cwa.googlegroups.com>
Message-ID: <1138989787.980000.142070@o13g2000cwo.googlegroups.com>

Oh, and I forgot another Aycock creation: UCPy [16].

Paul

[16] http://pages.cpsc.ucalgary.ca/~aycock/papers/ucpy.pdf



From robert.kern at gmail.com  Sat Feb 18 14:40:09 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 18 Feb 2006 13:40:09 -0600
Subject: Numpy for PythonCE
In-Reply-To: <dt7cfi$ta9$1@online.de>
References: <dt7cfi$ta9$1@online.de>
Message-ID: <dt7t6p$99g$1@sea.gmane.org>

"G???????????????????????????????????????" wrote:
> Hi,
> is there a version of Numpy (or Numarray) available
> that is compatible to PythonCE 2.3? 

I haven't heard of anyone trying. Perhaps you could try compiling the latest SVN
of numpy and tell us how it goes on numpy-discussion at lists.sourceforge.net .

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From nogradi at gmail.com  Sat Feb  4 09:00:29 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Sat, 4 Feb 2006 15:00:29 +0100
Subject: OO conventions
In-Reply-To: <5f56302b0602020904h4a130392kf0a8730f5a53d097@mail.gmail.com>
References: <mailman.1334.1138833641.27775.python-list@python.org>
	<pan.2006.02.01.23.03.37.881298@zetafunc.net>
	<mailman.1336.1138835495.27775.python-list@python.org>
	<1138888210.827054.68690@g49g2000cwa.googlegroups.com>
	<5f56302b0602020904h4a130392kf0a8730f5a53d097@mail.gmail.com>
Message-ID: <5f56302b0602040600s22aa718bwced7fd9f327bf551@mail.gmail.com>

> > Actually, this way of creating a class instance is good OO practice in
> > many places: The Image.open() method acts as a factory-function for
> > creating Image objects.
> > You don't know, until you inspect the return value, if the created
> > object is actually an instance of class Image or something which just
> > happens to behave like one...
> > It could for instance be a sub-class of Image, JpegImage, if that
> > better suits the class library designers.
> > In general, factory-functions allow greater uncoupling between
> > interface and implementation.
> >
>
> From all the enlightening replies it seems to me that my next task
> should be to look into what 'factory functions' are. Whenever I've
> seen the word 'factory' I just skipped it, knowing that if I really
> need to know what it is, I'll come back to it later. Apparently it's
> just about time, thanks all for the comments.
>


I've been looking around for what factory functions are, but honestly
I've been grepping and googling but couldn't find a clear definition
of the concept of 'factory', 'factory function' or 'class factory'. As
I've said I'm relatively new to OOP and the reason is that for too
long I thought that there is no need for it, ordinary C will do. But
once the concepts became clear, it started to become useful. That's
why I'm not particularly interested in examples and code snippets but
rather the general ideas and their definitions, but for these
'factories' I really couldn't find a clear explanation anywhere only
how to use them, example code and such. Perhaps because I was only
searching in the context of Python.

So after all, what is a 'factory' or 'factory function'?


From dbough77 at yahoo.com  Thu Feb 23 18:37:19 2006
From: dbough77 at yahoo.com (DannyB)
Date: 23 Feb 2006 15:37:19 -0800
Subject: Concantenation and string slicing
In-Reply-To: <1140737092.542387.178050@i39g2000cwa.googlegroups.com>
References: <1140735316.752278.298490@v46g2000cwv.googlegroups.com>
	<1140737092.542387.178050@i39g2000cwa.googlegroups.com>
Message-ID: <1140737839.117053.73290@e56g2000cwe.googlegroups.com>

Wow - thats simple =).  Thanks a ton!!



From rick at localhost.localdomain  Sun Feb  5 13:39:18 2006
From: rick at localhost.localdomain (Rick Spencer)
Date: Sun, 05 Feb 2006 10:39:18 -0800
Subject: what's wrong with my popen reasoning?
Message-ID: <pan.2006.02.05.18.39.11.339378@localhost.localdomain>

Hi all,

I am very new to Python programming. I am writing a program to manage
wireless connections, this is for GNOME on Linux. I present the user with
a "connect" button. I want to handle the connection for them slightly
different depending on whether or not the wireless access point they are
trying to connect to is secure. In either case, I have a similar question. 

In the first case, the wireless access point is secured. I want to bring
up the GNOME applet for configuring a wireless access interface.  I can
pass the command line commands to bring it up, but I can't figure out how
to bring it up in a modal fashion, so that my Python program waits for the
user to dismiss it before my program gets control again.

In the second case, the access point is not secured. I just want to fire
off the command line utility (iwconfig) for connecting. In this case, I
want my program to wait until iwconfig is done before continuing on. I
figure that I could just write a line of code to read in from the console,
but I thought there might be a more pythonic way of doing it. 

Here's my function so far, with variables replaced with constants to make
it easier to read:

def connect_clicked(self, widget, data=None):
 if locked:
  os.popen("sudo network-admin -c ath0")
  self.emit('connection-attempted', "ath0")

 else:
  os.popen("sudo iwconfig ath0 ap 00:0F:B3:31:CB:01")
 self.emit('connection-attempted', "ath0")

Thanks much!

Cheers, Rick



From sjstreat2002 at yahoo.com  Thu Feb 23 19:21:51 2006
From: sjstreat2002 at yahoo.com (S Streat)
Date: Thu, 23 Feb 2006 16:21:51 -0800 (PST)
Subject: Help with questor
Message-ID: <20060224002151.72495.qmail@web32805.mail.mud.yahoo.com>

 
  I am new to python and computer programming. I am trying to save the questor.py file so that it retains it's data. My problem is that I don't really understand how to do it. I have been reviewing tutorials and I have gotten this far, but the data still doesn't save. Can someone tell me what it is I am overlooking?
   
  # questor.py  
  # define some constants for future use
  kQuestion = 'question'
kGuess = 'guess'
  # define a function for asking yes/no questions
def yesno(prompt):
 ans = raw_input(prompt)
 return (ans[0]=='y' or ans[0]=='Y')
  # define a node in the question tree (either question or guess)
class Qnode:
 
 # initialization method
 def __init__(self,guess):
  self.nodetype = kGuess
  self.desc = guess
 
 def retrieve(self, file):
  self.desc = file.readline().rstrip()
  self.nodetype = file.readline().rstrip()
  if self.nodetype == kQuestion:
   slef.nodes = {0:Qnode(''), 1:Qnode('')}
   retrieve(self.nodes[0], file)
   retrieve(self.nodes[1], file)
  return
  
 def save(self, file):
  file.write(self.desc + "\n")
  file.write(self.nodetype + "\n")
  if self.nodetype == kQuestion:
   save(self.nodes[0], file)
   save(self.nodes[1], file)
  return
 # get the question to ask 
 def query(self):
  if (self.nodetype == kQuestion):
   return self.desc + " "
  elif (self.nodetype == kGuess):
   return "Is it a " + self.desc + "? "
  else:
   return "Error: invalid node type!"
   # return new node, given a boolean response
 def nextnode(self,answer):
  return self.nodes[answer]
   # turn a guess node into a question node and add new item
 # give a question, the new item, and the answer for that item
 def makeQuest( self, question, newitem, newanswer ):
    # create new nodes for the new answer and old answer
  newAnsNode = Qnode(newitem)
  oldAnsNode = Qnode(self.desc)
    # turn this node into a question node
  self.nodetype = kQuestion
  self.desc = question
    # assign the yes and no nodes appropriately
  self.nodes = {newanswer:newAnsNode, not newanswer:oldAnsNode}
 
 
  def traverse(fromNode):
 # ask the question
 yes = yesno( fromNode.query() )
 
 # if this is a guess node, then did we get it right?
 if (fromNode.nodetype == kGuess):
  if (yes):
   print "I'm a genius!!!"
   return
  # if we didn't get it right, return the node
  return fromNode
 
 # if it's a question node, then ask another question
 return traverse( fromNode.nextnode(yes) )
  def run():
 # start with a single guess node
 try:
  f = open('c:\nodetree.txt', 'r')
  cont = f.readlines()
  known = cont.count('guess\n')
  del cont
  f.seek(0)
  topNode = Qnode('')
  retrieve(topNode, f)
  f.close()
 except:
  topNode = Qnode('python')
  known = 1
 
 
 
 done = 0
 while not done:
  # ask questions till we get to the end
  result = traverse( topNode )
  
  # if result is a node, we need to add a question
  if (result):
   item = raw_input("OK, what were you thinking of? ")
   print "Enter a question that distinguishes a",
   print item, "from a", result.desc + ":"
   q = raw_input()
   ans = yesno("What is the answer for " + item + "? ")
   result.makeQuest( q, item, ans )
   print "Got it."
  
  # repeat until done
  print
  done = not yesno("Do another? ")
  print
  
# immediate-mode commands, for drag-and-drop or execfile() execution
if __name__ == '__main__':
 run()
 print
 raw_input("press Return>")
else:
 print "Module questor imported."
 print "To run, type: questor.run()"
 print "To reload after changes to the source, type: reload(questor)"
  # end of questor.py

		
---------------------------------
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From codecraig at gmail.com  Sun Feb 19 17:17:11 2006
From: codecraig at gmail.com (abcd)
Date: 19 Feb 2006 14:17:11 -0800
Subject: Format file size for printing
Message-ID: <1140387431.610729.48700@o13g2000cwo.googlegroups.com>

is there a built-in way of printing the size of a file nicely?

So if the file size is 103803 bytes it prints out like: 103.8K
or
0.1MB 

something liek that?



From sw at wordtech-software.com  Sat Feb 11 12:24:34 2006
From: sw at wordtech-software.com (Kevin Walzer)
Date: Sat, 11 Feb 2006 12:24:34 -0500
Subject: Yet another GUI toolkit question...
In-Reply-To: <mailman.1747.1139671043.27775.python-list@python.org>
References: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
	<mailman.1747.1139671043.27775.python-list@python.org>
Message-ID: <43EE1DD2.7040009@wordtech-software.com>

Peter Decker wrote:
> On 2/10/06, Kevin Walzer <sw at wordtech-software.com> wrote:
> 
>> I'm undertaking my first semi-substantial Python GUI application after a
>> long time dabbling with the language.
>>
> ...
>> So: my question is, would it be more productive for me to wrestle with
>> these extensions when there doesn't seem to be much constituency for
>> their use, or would it be better/faster/more efficient for me to start
>> scaling the wxPython mountain?
> 
> If you're going cross-platform, then wxPython is the toolkit to use.
> It looks and works correctly on all platforms.
> 
> I worked with wxPython for a couple of years, and constantly struggled
> with the ugle, C++ style syntax, and then discovered Dabo. Dabo is a
> full 3-tier application framework, and its UI tier wraps wxPython. So
> while you're using wxPython when you use dabo.ui, you're writing
> clean, Pythonic code. I found that after playing around with Dabo for
> a little bit, I could write apps that worked without constantly going
> to the docs to look up some obscure constant or event name. The
> authors are also extremely helpful, so if write your app using Dabo,
> I'm sure that you'll have tons of support.
> 
> http://dabodev.com
> 
> --
> 
> # p.d.

Dabo looks interesting, but isn't it mainly for database applications?
Has any other kind of application been developed with it? Also, it seems
very Windows/Linux-centric. Is anyone using it on OS X?

-- 
Kevin Walzer
iReveal: File Search Tool
http://www.wordtech-software.com


From eels at nikocity.de  Tue Feb  7 06:29:19 2006
From: eels at nikocity.de (eels)
Date: 7 Feb 2006 03:29:19 -0800
Subject: ftp: get list of files
Message-ID: <1139311759.603645.13790@f14g2000cwb.googlegroups.com>

Hello,

I want to get a listing of my files at web server with ftp. I wantn 't
download the files.
With yyy = ftp.retrlines('LIST') I get this listing at stdout, but I
need this information at variable yyy.
How can I resolve this problem?

Thank's for your hints, Thomas



From steve at holdenweb.com  Sat Feb  4 10:09:05 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 04 Feb 2006 15:09:05 +0000
Subject: OO conventions
In-Reply-To: <5f56302b0602040600s22aa718bwced7fd9f327bf551@mail.gmail.com>
References: <mailman.1334.1138833641.27775.python-list@python.org>	<pan.2006.02.01.23.03.37.881298@zetafunc.net>	<mailman.1336.1138835495.27775.python-list@python.org>	<1138888210.827054.68690@g49g2000cwa.googlegroups.com>	<5f56302b0602020904h4a130392kf0a8730f5a53d097@mail.gmail.com>
	<5f56302b0602040600s22aa718bwced7fd9f327bf551@mail.gmail.com>
Message-ID: <ds2g2g$cao$1@sea.gmane.org>

Daniel Nogradi wrote:
[...]
> So after all, what is a 'factory' or 'factory function'?

The name is intended to be indicative: it's a function that makes things 
- usually instances of some class.

As has already been pointed out. Image is a module from PIL, so 
Image.open() is a function in that module. When you call it, it creates 
an instance of some suitable image class (which will depend on the type 
of the image) and returns that.

The point here is that Image.open() returns a 
JpegImagePlugin.JpegImageFile instance for a .jpg file, a 
GifImagePlugin.GifImageFile instance for a .gif file, and so on. It 
wouldn't make sense to use a single class to represent all these 
different image types, so Image.open() just creates an instance of the 
appropriate class (whatever that may be, which will vary from call to 
call) and returns that.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From lycka at carmen.se  Fri Feb 10 04:59:04 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 10 Feb 2006 10:59:04 +0100
Subject: Question about idioms for clearing a list
In-Reply-To: <cQRGf.54501$PL5.14689@newssvr11.news.prodigy.com>
References: <mailman.1294.1138727665.27775.python-list@python.org>	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>	<mailman.1489.1139232969.27775.python-list@python.org>	<ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>	<mailman.1537.1139297533.27775.python-list@python.org>	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>	<mailman.1546.1139320907.27775.python-list@python.org>	<dscdtr$ciu$1@wake.carmen.se>
	<mailman.1594.1139403378.27775.python-list@python.org>
	<dsd311$qlp$1@wake.carmen.se>
	<ZatGf.28418$F_3.14242@newssvr29.news.prodigy.net>
	<dsfej3$1i6$1@wake.carmen.se>
	<cQRGf.54501$PL5.14689@newssvr11.news.prodigy.com>
Message-ID: <dsho58$47k$1@wake.carmen.se>

Bryan Olson wrote:
> Magnus Lycka wrote:
>> Do you really have a usecase for this? It seems to me that your
>> argument is pretty hollow.
> 
> Sure:
> 
>     if item_triggering_end in collection:
>         handle_end(whatever)
>         collection.clear()
> 
> Or maybe moving everything from several collections into
> a single union:
> 
>     big_union = set()
>     for collection in some_iter:
>         big_union.update(t)
>         collection.clear()

I don't understand the second one. Where did 't' come from?
Anyway, tiny code snippets are hardly usecases. Are these from
real code? If they are, why aren't there support for emptying
lists? Have you patched your Python? Didn't you actually need
to support lists?

I still don't see any convincing usecase for the kind of
ducktyping you imply. There are certainly situations where
people have used lists or dicts before there were sets in
Python, and want to support both variants for a while at least,
but since their APIs are so differnt for these types, .clear()
seems like a non-issue.

If this was a problem in the real world, I bet we'd see a lot
of code with functions similar to this:

def clear(container):
     try:
         del container[:]
     except TypeError:
         container.clear()

If you *do* have this problem, this is a very simple workaround.

>> As far as I understand, the only operation which is currently used
>> by all three collections is .pop, but that takes a different number
>> or parameters, since these collections are conceptually different!
> 
> The all support len, iteration, and membership test.

Ok. Forgot that. id(), str() and repr() as well. Still, after almost
10 years of Python programming I can't remember that I ever ran into
a situation where I ever needed one single piece of code to empty
an arbitrary container. It's trivial to solve, so I wouldn't have
stopped to think about it for even a minute if it happened, but I
still don't think it happened.This was never a problem for me, and
I don't think I saw anyone else complain about it either, and I've
seen plenty of complaints! ;)

I can understand the argument about making it easy to remember how
to perform an action. I think the current situation is correct. To
introduce redunancy in this case (del x[:] <==> x.clear()) would not
be an improvement of Python. In the long run, such a strategy of
synonyms would make Python much more like Perl, and we don't want
that. So I can understand that the question pops up though (but
not why it gets such proportions).

I don't buy this duck-typing argument though. Considering how little
it would change in unifying these divergent APIs, it still sounds
as hollow to me.

> Many algorithms make sense for either sets or lists. Even if they
> cannot work on every type of collection, that's no reason not
> to help them be as general as logic allows.

 >>> class BryansList(list):
...     add=list.append
...     def clear(self):
...         del self[:]
...
 >>> b = BryansList([1,2,3,4,5])
 >>> b
[1, 2, 3, 4, 5]
 >>> b.add(6)
 >>> b.clear()
 >>> b
[]

Happy now? You can keep it, I don't need it. :)
Most of us consider minimal interfaces a virtue.


From michaeltaft at gmail.com  Sun Feb 12 20:40:21 2006
From: michaeltaft at gmail.com (mwt)
Date: 12 Feb 2006 17:40:21 -0800
Subject: Downloading Large Files -- Feedback?
In-Reply-To: <43EFDB34.80103@REMOVEMEcyber.com.au>
References: <1139773494.245577.102870@g47g2000cwa.googlegroups.com>
	<7x3bioxrnj.fsf@ruckus.brouhaha.com>
	<1139780009.673785.51270@g14g2000cwa.googlegroups.com>
	<43EFDB34.80103@REMOVEMEcyber.com.au>
Message-ID: <1139794821.875941.39230@g14g2000cwa.googlegroups.com>


>It isn't written in C, but get your hands on wget. It
>is probably already on your Linux distro, but if not,
>check it out here:

>http://www.gnu.org/software/wget/wget.html

Thanks. I'm checking it out.



From bokr at oz.net  Tue Feb  7 10:42:32 2006
From: bokr at oz.net (Bengt Richter)
Date: Tue, 07 Feb 2006 15:42:32 GMT
Subject: Detecting line endings
References: <1139236514.022464.319970@g14g2000cwa.googlegroups.com>
Message-ID: <43e8bb1e.177822094@news.oz.net>

On 6 Feb 2006 06:35:14 -0800, "Fuzzyman" <fuzzyman at gmail.com> wrote:

>Hello all,
>
>I'm trying to detect line endings used in text files. I *might* be
>decoding the files into unicode first (which may be encoded using
>multi-byte encodings) - which is why I'm not letting Python handle the
>line endings.
>
>Is the following safe and sane :
>
>text = open('test.txt', 'rb').read()
>if encoding:
>    text = text.decode(encoding)
>ending = '\n' # default
>if '\r\n' in text:
>    text = text.replace('\r\n', '\n')
>    ending = '\r\n'
>elif '\n' in text:
>    ending = '\n'
>elif '\r' in text:
>    text = text.replace('\r', '\n')
>    ending = '\r'
>
>
>My worry is that if '\n' *doesn't* signify a line break on the Mac,
>then it may exist in the body of the text - and trigger ``ending =
>'\n'`` prematurely ?
>
Are you guaranteed that text bodies don't contain escape or quoting
mechanisms for binary data where it would be a mistake to convert
or delete an '\r' ? (E.g., I think XML CDATA might be an example).

Regards,
Bengt Richter


From hancock at anansispaceworks.com  Sun Feb 19 12:59:58 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Sun, 19 Feb 2006 11:59:58 -0600
Subject: ANN: FreeImagePy 1.2.2
In-Reply-To: <8ba244fb0602160634l799f3adevbe6e67ae9db338be@mail.gmail.com>
References: <43f43ec3$0$29107$5fc30a8@news.tiscali.it>
	<dt223q$s9n$1@newsreader3.netcologne.de>
	<8ba244fb0602160634l799f3adevbe6e67ae9db338be@mail.gmail.com>
Message-ID: <20060219115958.05238d31@samwise.anansi>

On Thu, 16 Feb 2006 09:34:18 -0500
Andrew Gwozdziewycz <apgwoz at gmail.com> wrote:
> > Knowing some details about PIL and as good as no details
> > about FreeImage, I would like in this context to become
> > enlightened by the answer to the question, when does it
> > make sense to use FreeImage instead of PIL?
> >  From what I know up to now I can't see any use for
> >  FreeImage :-( .
> 
> both freeimagepy and freeimage are released under the GPL,
> PIL is not.

This is misleading! The PIL license is GPL-compatible (i.e.
it could be incorporated into a GPL work), as it is a
non-copyleft free license. You may be confused by Lundh's
proprietary-then-free release strategy: he always releases a
newer version under a proprietary license, at which point
the old version is free-licensed.  But the old version is
completely without strings -- you could, if you wanted, try
to give Mr. Lundh "a run for his money" by extending PIL
faster than he can.

Not exactly "cricket", but legal. ;-)

However, while PIL is very strong at image-manipulation, it
is weak on file-format compatibility: As long as you stick
to PNG format, you can do just about anything you want (and
there is decent JPG and GIF support). But if you have
compelling reasons to output data in other formats, you'll
find PIL disappointing -- there are many formats it can't
deal with at all, and most of the rest it can only import
(in the wild, there are *dozens* of obscure image formats to
be found).

IMHO, this isn't too serious an issue -- it's just
specialization: PIL is for *image manipulation* not *image
conversion*, and it provides enough of the latter for the
most common applications.

Other choices include ImageMagick, but API stability,
particularly of the Python bindings, is a real problem (in
fact, I think there's more than one python binding for
ImageMagick, but I'm not sure -- which goes some way to
showing why it's a frustrating package to use).  Things
may have improved lately, I haven't checked in awhile.

So, IMHO, there's still PLENTY of room for innovation in
the application area of image-handling tools for
Python.  PIL is not a "category-killer". At least not yet.

Cheers,
Terry

 -- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From bokr at oz.net  Fri Feb 10 19:03:57 2006
From: bokr at oz.net (Bengt Richter)
Date: Sat, 11 Feb 2006 00:03:57 GMT
Subject: module with __call__ defined is not callable?
References: <mailman.1632.1139440081.27775.python-list@python.org>
Message-ID: <43ed269d.467485969@news.oz.net>

On Thu, 9 Feb 2006 10:07:49 +1100, "Delaney, Timothy (Tim)" <tdelaney at avaya.com> wrote:

>Steven D'Aprano wrote:
>
>> That's not a _reason_, it is just a (re-)statement of fact. We know
>> that defining a __call__ method on a module doesn't make it callable.
>> Why not? The answer isn't "because defining a __call__ method on a
>> module or an instance doesn't make it callable", that's just avoiding
>> the question.=20
>
>My reading of the OP sounded like he wanted to know the *technical*
>reason for why it doesn't work - which is what I provided.
>
>If you can come up with a convincing argument, after re-reading the OP
>(as I've just done), that that is *not* what he meant, I'm all ears.
>
While you can't put __call__ on the builtin module type,
you _can_ put it on a subclass:

 >>> class M(type(__builtins__)):
 ...    def __call__(self): return '%r was called'%self
 ...
 >>> m = M('M')
 >>> m()
 "<module 'M' (built-in)> was called"

Not that I can see why the OP would want to spell any module access module().

OTOH, I could see wanting to define properties, and access module.latest_foo
and have it choose dynamically from versioned stuff, or something like that.
Of course you can write module.get_latest_foo() as an ordinary function, and
not be bothered with subclassing and jimmying sys.modules and such.

Properties and methods are both forms of descriptors, so they need to be attributes
of the type to work. With a subclass you could do that too.

Regards,
Bengt Richter


From steve at holdenweb.com  Mon Feb 13 00:25:00 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Feb 2006 00:25:00 -0500
Subject: ordered sets operations on lists..
In-Reply-To: <1139807477.28916.7.camel@kenshin>
References: <mailman.1722.1139590689.27775.python-list@python.org>	<1139592166.993686.212000@f14g2000cwb.googlegroups.com>	<1139599834.975607.77180@f14g2000cwb.googlegroups.com>	<1halbdx.dd0p1l1obawfkN%aleaxit@yahoo.com>	<43ef8e5f.625119424@news.oz.net>	<1hana3d.1bwbt4c1esela5N%aleaxit@yahoo.com>	<43F007F9.3090103@holdenweb.com>
	<1139805374.7547.24.camel@kenshin>	<dsp38j$mef$1@sea.gmane.org>
	<1139807477.28916.7.camel@kenshin>
Message-ID: <dsp57a$r22$1@sea.gmane.org>

Felipe Almeida Lessa wrote:
> Em Dom, 2006-02-12 ?s 23:51 -0500, Steve Holden escreveu:
> 
>>The basic answer is that so far no developer has felt it worthwhile to 
>>expend time on adding these optimizations.
> 
> 
> I always thought these small optimizations could lead Python to be
> faster overall. I remember about this every time I see CPython vs.
> IronPython benchmarks (.NET and Mono do some nice optimizations at
> compile and run times).
> 
Indeed it is true that on some benchmarks IronPython is faster than 
CPython. I suspect this was helped by the fact that IronPython is Jim's 
third implementation of Python (I believe he was familiar with CPython 
before he started on Jython, formerly known as JPython).

The fact remains that until someone writes the code it can't be included 
in the implementation. Performance optimization, unfortunately, doesn't 
have the same glamorous cachet as more esoteric language features.
> 
>>>Also, IIRC Psyco does optimize these constant expressions. Or am I
>>>wrong?
>>>
>>
>>Psyco does some very advanced things, but it does them all at run-time. 
>>Unless I misunderstand (not unheard of), there are no circumstances 
>>under which Psyco will improve run-time for a piece of code that is only 
>>executed once.
> 
> 
> Sorry, I think I should have been clearer. Yes, Psyco only helps at
> runtime (when the function is called), but those constant folds only
> practically help on parts of the code that are called many times anyway,
> right?
> 
Right. Technically constant folding is a win for a single execution, but 
only if you don't take the slightly-increased compile time into account :-)

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From gh at ghaering.de  Tue Feb 21 05:15:39 2006
From: gh at ghaering.de (=?ISO-8859-1?Q?Gerhard_H=E4ring?=)
Date: Tue, 21 Feb 2006 11:15:39 +0100
Subject: Little tool - but very big size... :-(
In-Reply-To: <43FAE06E.3090301@gmail.com>
References: <mailman.2211.1140513270.27775.python-list@python.org>	<1140513852.240140.144160@f14g2000cwb.googlegroups.com>
	<43FAE06E.3090301@gmail.com>
Message-ID: <43FAE84B.7060703@ghaering.de>

Durumdara wrote:
> Hi !
> 
> Yes, it is. But that tool is designed for USB PenDrive usage.
> The assessor is collect all tools it needed to see a machine(s) in the 
> checked corporation.
> He/she needs little programs, because he need to store the results of 
> the checkings too, not the tools only. [...]

Additional Python or wxPython tools packed using py2exe will only need a 
few kilobytes if you all copy them to the same directory on the pen 
drive. All these tools can share the same .pyd and .dll files.

-- Gerhard


From ivoras at __yahoo__.com_  Tue Feb  7 14:51:59 2006
From: ivoras at __yahoo__.com_ (Ivan Voras)
Date: Tue, 07 Feb 2006 20:51:59 +0100
Subject: threads and memory
In-Reply-To: <mailman.1500.1139245971.27775.python-list@python.org>
References: <mailman.1500.1139245971.27775.python-list@python.org>
Message-ID: <dsatov$adv$1@bagan.srce.hr>

Lee Leahu wrote:

> However, I have encountered the following error after I have started my 381st thread:

This number (actually, ~380) is suspicious when seen with threads 
because it almost always means running out of process address space. As 
threads are part of a single process, and that process has (usually 
today) 32bit address space, and modern Linux systems allocate huge 
amounts of memory per-thread (8 MB for threads' stack!), and the kernel 
reserves ~1MB in the address space for itself, you can easily reach > 
4GB of total allocated memory.

This *doesn't* mean you are actually using 4GB of memory (i.e. storing 
values to it), only that the process gets "assigned" this memory. Python 
doesn't support specifying thread attributes AFAIK, so you should find a 
way to specify default thread stack size, possibly with an environment 
variable (see manual page for "pthread" library calls). Try 64k - your 
task seems simple enough :)



From oliphant.travis at ieee.org  Mon Feb  6 13:29:49 2006
From: oliphant.travis at ieee.org (Travis E. Oliphant)
Date: Mon, 06 Feb 2006 11:29:49 -0700
Subject: Scientific Computing with NumPy
In-Reply-To: <ds82i7$4kh$1@sea.gmane.org>
References: <ds7bvh$ab1$2@gemini.csx.cam.ac.uk>	<mailman.1482.1139225595.27775.python-list@python.org>	<ds7ch4$bj7$1@gemini.csx.cam.ac.uk>	<1139229403.024321.215780@o13g2000cwo.googlegroups.com>	<ds7mrb$443$1@gemini.csx.cam.ac.uk>
	<ds82i7$4kh$1@sea.gmane.org>
Message-ID: <ds84j3$ddk$1@sea.gmane.org>

Tim Hochberg wrote:
> mclaugb wrote:
> 
> 
> No, Scientific Python is "a collection of Python modules that are useful 
> for scientific computing" written by Konrad Hinsen. I'm not a user, but 
> you can find information here:
> 
> 	http://starship.python.net/~hinsen/ScientificPython/
> 
> SciPy is, I believe, a more recent and more ambitious project. In any 
> event it is not directly related to ScientficPython. Information here:
> 

SciPy's been around since 2001.  ScientificPython since about 1998, I 
think.

> Numeric: This is the origingal array package.
> 
> Numarray: This was written as a replacement for Numeric. It has improved 
> performance for large arrays. The internals were also simplified and 
> many other improvements were made (arrays were subclassable, numeric 
> signal handling vastly improved, etc). Unfortunately, a side effect of 
> the changes was that small array performance got worse. There was a 
> signifigant chunk of the numeric community for whom this was a deal 
> breaker and as a result there ended up being a split between the Numeric 
> and Numarray communities.

Just to be clear, small array performance was only 1 of the 
"deal-breaker" problems with numarray.  Anothber big problem for SciPy 
was that the Numeric C-API was never fully supported (in particular the 
Ufunc C-API).  This made it more difficult to convert to numarray. 
Thus, porting never happened.  The small-array speed issue just made 
porting that much less enticing.

> 
> Numpy: This is a rewrite of Numeric that incorporates most of the 
> improvements in Numarray. 

The goal is to incorporate *all* of the improvements (unless being 
written in Python is one of the improvements).  If there are missing 
improvements we need to know about them.


Thanks to Tim for spreading some light on the issue.  There will no 
doubt be continued confusion for new users over the coming months. 
Hopefully, with time the confusion will fade as more people use NumPy 
and any remainging issues get resolved.

-Travis



From lists at nabble.com  Fri Feb  3 14:31:14 2006
From: lists at nabble.com (gilcneth (sent by Nabble.com))
Date: Fri, 3 Feb 2006 11:31:14 -0800 (PST)
Subject: Python - python-list
Message-ID: <2746115.post@talk.nabble.com>


Hello,

I am trying to automate my personal website logons and recently discovered cPamie, which looks like it may be a very handy tool indeed.

But, so far, I have not had any luck using it for website logons.  This may or may not be a cPamie issue, so please bear with me.

The site I am trying to log on to automatically displays my username, but I must feed it my password in order to log on.  No problem.  I can get my password in the textbox, just fine.  Where I have problems, however, is with the invocation of the log on itself.

I am no HTML guru and am much more familiar with Python than any of the more accepted web languages, but I can read it well enough to sort of partially diagnose the problem.  It appears that the buttonname itself is hidden--which means (I think) that I cannot call a method requiring the input of a buttonname.

I have tried a number of methods from cPamie in order to try to log on, in lieu of the buttonname, but so far I have been unsuccessful.

Does anyone know of a solution to this problem?

(Incidently, I can log on by pressing the button with my mouse, but it is key and mouse strokes I am trying to eliminate, of course)

Thanking you in advance,

Chris N.
--
View this message in context: http://www.nabble.com/Python---python-list-t1055356.html#a2746115
Sent from the Python - python-list forum at Nabble.com.
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From robert.kern at gmail.com  Sun Feb  5 12:33:56 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sun, 05 Feb 2006 11:33:56 -0600
Subject: NumPy error
In-Reply-To: <J_pFf.27$LI6.21@fe06.lga>
References: <KLnFf.3$ug1.0@fe04.lga> <44mgs1F2to82U1@uni-berlin.de>
	<J_pFf.27$LI6.21@fe06.lga>
Message-ID: <ds5cu3$eu4$1@sea.gmane.org>

jason wrote:
> Thanks.
> 
> After executing the first line, I now get:
> 
>>>>from scipy.optimize import fmin
> 
> Overwriting fft=<function fft at 0x012116F0> from scipy.fftpack.basic (was 
> <function fft at 0x011C8A70> from numpy.dft.fftpack)
> Overwriting ifft=<function ifft at 0x01211730> from scipy.fftpack.basic (was 
> <function inverse_fft at 0x011C8AB0> from numpy.dft.fftpack)
> 
> And then I get the following result:
> 
>>>>xopt = fmin(rosen, x0)
> 
> Optimization terminated successfully.
>          Current function value: 0.000066
>          Iterations: 141
>          Function evaluations: 243
> 
>>>>print xopt
> 
> [ 0.99910115  0.99820923  0.99646346  0.99297555  0.98600385]
> 
> Two questions:
> 1. does the "overwriting..." message make sense?

It's replacing the fft() and ifft() functions in numpy with the optimized
functions in scipy. I don't think we're doing that anymore in SVN scipy.

> I uninstalled scipy and numpy and re-installed them.
> 
> 2. has the algorithm (accuracy level) changed? the result seems different 
> from that reported in
> http://www.scipy.org/Wiki/Documentation?action=AttachFile&do=get&target=scipy_tutorial.pdf
> on page 12.

It is different. We're not really sure why. The simplex method is not an
algorithm known for its robustness.

Sorry about the confusion with dtypechar. Our releases of numpy and scipy got
out of sync.

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From sullivanz.pku at gmail.com  Sun Feb 19 01:18:20 2006
From: sullivanz.pku at gmail.com (sullivanz.pku at gmail.com)
Date: 18 Feb 2006 22:18:20 -0800
Subject: Any Tkinker based rich text widget?
Message-ID: <1140329900.341774.175600@f14g2000cwb.googlegroups.com>

Hi all
I am using the standard python GUI Tkinter as my program's main
interface. Although I know wxPython has some widget to support rich
text widget, but I do not have time to shift to wx---- series. Does
anyone know any Tkinter based widget that support:

1. Blod, Italic, Underline and their combinations.
2. Several most commonly used fonts, like Times New Roman and Arial
3. Multiline text
4. Cross platform support. Available in Linux-RedHat and Mac OS series
and Windows 2000 or above.
5.Image embedding. Support jpeg, gif, bmp. The more the better.


and better support:
Hyperlink, Text color, the more the better.


Thank you so much for help!



From fakeaddress at nowhere.org  Fri Feb 10 05:31:50 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Fri, 10 Feb 2006 10:31:50 GMT
Subject: Question about idioms for clearing a list
In-Reply-To: <dsho58$47k$1@wake.carmen.se>
References: <mailman.1294.1138727665.27775.python-list@python.org>	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>	<mailman.1489.1139232969.27775.python-list@python.org>	<ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>	<mailman.1537.1139297533.27775.python-list@python.org>	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>	<mailman.1546.1139320907.27775.python-list@python.org>	<dscdtr$ciu$1@wake.carmen.se>
	<mailman.1594.1139403378.27775.python-list@python.org>
	<dsd311$qlp$1@wake.carmen.se>
	<ZatGf.28418$F_3.14242@newssvr29.news.prodigy.net>
	<dsfej3$1i6$1@wake.carmen.se>
	<cQRGf.54501$PL5.14689@newssvr11.news.prodigy.com>
	<dsho58$47k$1@wake.carmen.se>
Message-ID: <qYZGf.26902$Jd.11304@newssvr25.news.prodigy.net>

Magnus Lycka wrote:
> Bryan Olson wrote:
> 
>> Magnus Lycka wrote:
>>
>>> Do you really have a usecase for this? It seems to me that your
>>> argument is pretty hollow.
>>
>>
>> Sure:
>>
>>     if item_triggering_end in collection:
>>         handle_end(whatever)
>>         collection.clear()
>>
>> Or maybe moving everything from several collections into
>> a single union:
>>
>>     big_union = set()
>>     for collection in some_iter:
>>         big_union.update(t)
>>         collection.clear()
> 
> 
> I don't understand the second one. Where did 't' come from?

Cut-and-past carelessness. Meant to update with 'collection'.

> Anyway, tiny code snippets are hardly usecases.

The task is the usecase.

[...]
> I still don't see any convincing usecase for the kind of
> ducktyping you imply.

I didn't say I could convince you. I said that when different
types can support the same operation, they should also support
the same interface. That's what enables polymorphism.


-- 
--Bryan


From bradfordh at gmail.com  Tue Feb 14 18:02:17 2006
From: bradfordh at gmail.com (Tempo)
Date: 14 Feb 2006 15:02:17 -0800
Subject: Python and ASP
Message-ID: <1139958137.733403.33640@g44g2000cwa.googlegroups.com>

I recently uploaded a sample ASP-Python page to my web server and it
didn't show up correctly. Before I explain what it did, I should
mention that I got the same result when I tried to view the page from
my desktop (winxp user). So when I tried to view the sample ASP with
Python page from my desktop and web server, all that showed up was the
source code. I'm not sure exactly what this means since I know that
python 2.4 is installed on my computer and the ASP page still didn't
show up correctly. Here's the sample ASP-Python code, courtesy of
http://www.4guysfromrolla.com/webtech/082201-1.shtml :


<html>
<head>
	<title>ASP-Python Test Page</title>
</head>
<body>
<%@ Language=Python %>
<%
  Response.Write("Python lives in the ASP delimeters!")
%>
<br />

<script language="Python">
document.write("Python's throwing a party on the client-side!")
</script>
<br />

<script language="Python" runat="server">
Response.Write("Python gets ready to rumble inside a server-side
scripting block!")
</script>
</body>
</html>




Any ideas about what I am doing wrong? Thanks.



From infini.g at gmail.com  Wed Feb  1 20:39:40 2006
From: infini.g at gmail.com (GazaM)
Date: 1 Feb 2006 17:39:40 -0800
Subject: cgi - secure sessions
In-Reply-To: <7x8xsuczxz.fsf@ruckus.brouhaha.com>
References: <1138842390.012855.107610@g44g2000cwa.googlegroups.com>
	<7x8xsuczxz.fsf@ruckus.brouhaha.com>
Message-ID: <1138844380.094365.223840@g44g2000cwa.googlegroups.com>

wow, those were some seriously quick replies, thanks. I understand that
cookies is the best way to do things, but I didn't explain my problem
well, sorry.

Basically, I have a blog in the works and I want to have an online
interface for posting. What I have is a cgi script run through a server
side include line in the html, which looks for the session cookie, if
it is present will say 'logged in as "user"' and if the cookie isn't
there will display a login form. Now, the big showstopper here is that,
because session cookies are stored in http headers sent by the client
(afaik) the cgi script can't get any, because the http headers are
passed onto the html file and any cgi scripts inside don't get
anything... is there a workaround possible? I need to use an include
line instead of pointing to the script and making it output full html
as there are various other scripts run in the html as well, plus I am
hoping to use the cookie-detection script in other ways than just the
home page...

Again, any help is appreciated.

GazaM



From skip at pobox.com  Sun Feb 12 13:05:12 2006
From: skip at pobox.com (skip at pobox.com)
Date: Sun, 12 Feb 2006 12:05:12 -0600
Subject: Is Forth for real?
In-Reply-To: <roy-048E45.12573512022006@reader2.panix.com>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
	<1139754010.067582.214830@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>
	<1v44c3-geo.ln1@lairds.us>
	<pan.2006.02.12.17.38.02.455701@REMOVETHIScyber.com.au>
	<roy-048E45.12573512022006@reader2.panix.com>
Message-ID: <17391.30936.143514.842617@montanaro.dyndns.org>


    Roy> If you like Forth, take a look at PostScript.  

I miss NeWS... :-(

Skip


From jrivero at latinux.org  Tue Feb 21 13:45:40 2006
From: jrivero at latinux.org (Jesus Rivero (Neurogeek))
Date: Tue, 21 Feb 2006 14:45:40 -0400
Subject: html parser , unexpected '<' char in declaration
In-Reply-To: <pkhlv1hkcrmh7li0t25p8bj6kojk6r781d@4ax.com>
References: <1140473997.262973.149260@f14g2000cwb.googlegroups.com>	<mailman.2198.1140483714.27775.python-list@python.org>	<1140488536.933840.65530@o13g2000cwo.googlegroups.com>	<mailman.2200.1140489845.27775.python-list@python.org>
	<pkhlv1hkcrmh7li0t25p8bj6kojk6r781d@4ax.com>
Message-ID: <43FB5FD4.2060601@latinux.org>

Oopss!

You are totally right guys, i did miss the closing '>' thinking about
maybe errors in the use of ' or ".

Jesus

Tim Roberts wrote:

>"Jesus Rivero - (Neurogeek)" <jrivero at latinux.org> wrote:
>  
>
>>hmmm, that's kind of different issue then.
>>
>>I can guess, from the error you pasted earlier, that the problem shown
>>is due to the fact Python is interpreting a "<" as an expression and not
>>as a char. review your code or try to figure out the exact input you're
>>receving within the mta.
>>    
>>
>
>Well, Jesus, you are 0 for 2.  Sakcee pointed out what the exact problem
>was in his original message.  The HTML he is being given is ill-formed; the
><!DOCTYPE directive is not closed.  The SGML parser finds a <html> tag
>which it thinks is inside the <!DOCTYPE, and that's illegal.
>
>  
>
>>>well probabbly I should explain more.  this is part of an email . after
>>>the mta delivers the email, it is stored in a local dir.
>>>After that the email is being parsed by the parser inside an web based
>>>imap client at display time.
>>>
>>>I dont think I have the choice of rewriting the message!? and I dont
>>>want to reject the message alltogether.
>>>
>>>I can either 1-fix the incoming html by tidying it up
>>>or 2- strip only plain text out and dispaly that you have spam, 3 - or
>>>ignore that mal-formatted tag and display the rest
>>>      
>>>
>
>If this is happening with more than one message, you could check for it
>rather easily with a regular expression, or even just ''.find, and then
>either insert a closing '>' or delete everything up to the <html> before
>parsing it.
>  
>



From peter at engcorp.com  Tue Feb 21 10:46:07 2006
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 21 Feb 2006 10:46:07 -0500
Subject: Pyserial never read
In-Reply-To: <1140302110.028540.176210@g43g2000cwa.googlegroups.com>
References: <1140105936.408387.88130@z14g2000cwz.googlegroups.com>	<1140219414.143448.234450@z14g2000cwz.googlegroups.com>
	<1140302110.028540.176210@g43g2000cwa.googlegroups.com>
Message-ID: <dtfcjt$n9n$1@sea.gmane.org>

luca72 wrote:
> Thanks for your help, but it don't solve the problem.
> I receive only the echo and full stop.

If you want help, you'll do better to post small pieces of code that you 
are actually using, rather than making us guess or imagine what you are 
doing.  There are perhaps a dozen things that can go wrong with serial 
communications, and it's not efficient for us to start suggesting them 
one at a time...

-Peter



From steve at holdenweb.com  Sun Feb 12 23:51:33 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 12 Feb 2006 23:51:33 -0500
Subject: ordered sets operations on lists..
In-Reply-To: <1139805374.7547.24.camel@kenshin>
References: <mailman.1722.1139590689.27775.python-list@python.org>	<1139592166.993686.212000@f14g2000cwb.googlegroups.com>	<1139599834.975607.77180@f14g2000cwb.googlegroups.com>	<1halbdx.dd0p1l1obawfkN%aleaxit@yahoo.com>	<43ef8e5f.625119424@news.oz.net>	<1hana3d.1bwbt4c1esela5N%aleaxit@yahoo.com>	<43F007F9.3090103@holdenweb.com>
	<1139805374.7547.24.camel@kenshin>
Message-ID: <dsp38j$mef$1@sea.gmane.org>

Felipe Almeida Lessa wrote:
> Em Dom, 2006-02-12 ?s 23:15 -0500, Steve Holden escreveu:
> 
>>Given that Python 2.4 doesn't even perform simple constant folding for 
>>arithmetic expressions
>>[snip]
> 
> 
> May I ask why doesn't it perform such optimization? Is there any special
> difficulties in doing so with the Python compiler?
> 
As well to ask why the sky is blue, and has those little white things in 
it (unless you live in Arizona) :-)

The basic answer is that so far no developer has felt it worthwhile to 
expend time on adding these optimizations.

> Also, IIRC Psyco does optimize these constant expressions. Or am I
> wrong?
> 
Psyco does some very advanced things, but it does them all at run-time. 
Unless I misunderstand (not unheard of), there are no circumstances 
under which Psyco will improve run-time for a piece of code that is only 
executed once.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From http  Sat Feb 11 02:18:35 2006
From: http (Paul Rubin)
Date: 10 Feb 2006 23:18:35 -0800
Subject: is there a better way?
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
Message-ID: <7xk6c2fjn8.fsf@ruckus.brouhaha.com>

"markscala at gmail.com" <markscala at gmail.com> writes:
> But this seems ugly to me, and using "while" give me the heebies.  Is
> there a better approach?

Note that "list" is the name of a built-in type; I used "mylist".
Alex Martelli described how to do it in log n time using the bisect
module.  Here's a dumb linear time method that might be faster for
small n (of course you should time the different methods for your
particular Python implementation, if the speed matters):

   del mylist[len(mylist) - mylist.count(0):]

The above an example of where the natural

   del mylist[-mylist.count(0):]

does totally the wrong thing if there are no 0's in the list.  There
was a huge thread a while back about ways to fix that.

Another way, might be faster, esp. there's more than a few 0's:

   try:
     del mylist[mylist.index(0)]
   except ValueError: 
     pass   # no 0's in the list


From simon at brunningonline.net  Wed Feb  8 07:15:01 2006
From: simon at brunningonline.net (Simon Brunning)
Date: Wed, 8 Feb 2006 12:15:01 +0000
Subject: Question about idioms for clearing a list
In-Reply-To: <dsbe5e$24d$1@sea.gmane.org>
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au>
	<ds83kd$98m$1@sea.gmane.org>
	<mailman.1510.1139250471.27775.python-list@python.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<E78Gf.22893$Jd.14515@newssvr25.news.prodigy.net>
	<mailman.1567.1139348019.27775.python-list@python.org>
	<pan.2006.02.07.22.47.40.957502@REMOVETHIScyber.com.au>
	<dsbe5e$24d$1@sea.gmane.org>
Message-ID: <8c7f10c60602080415y584ac1b4x73e1293ff780619c@mail.gmail.com>

On 2/8/06, Fredrik Lundh <fredrik at pythonware.com> wrote:
> you seem to be missing that we're talking about a programming language
> here.  nothing is obvious if you don't know anything about the language;
> a lot of things are obvious once you've learned a little about it.  a little is
> all it takes.  why is that so hard to understand ?

"The only 'intuitive' user interface is the nipple. After that, it's
all learned." - Bruce Ediger

--
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From bradfordh at gmail.com  Tue Feb  7 12:09:48 2006
From: bradfordh at gmail.com (Tempo)
Date: 7 Feb 2006 09:09:48 -0800
Subject: Is Python good for web crawlers?
In-Reply-To: <mailman.1555.1139330693.27775.python-list@python.org>
References: <1139330008.270988.227170@g44g2000cwa.googlegroups.com>
	<mailman.1555.1139330693.27775.python-list@python.org>
Message-ID: <1139332188.851343.20580@g14g2000cwa.googlegroups.com>

Why do you say that the bottleneck of the crawler will always be
downloading the page? Is it becasue there isn't already a modual to do
this and I will have to start from scratch? Or a bandwidth issue?



From seb.haase at gmail.com  Fri Feb 17 17:01:05 2006
From: seb.haase at gmail.com (seb.haase at gmail.com)
Date: 17 Feb 2006 14:01:05 -0800
Subject: Python 3000 deat !? Is true division ever coming ?
References: <1139810036.943598.229030@g47g2000cwa.googlegroups.com>
	<dt4pj8$o21$1@wake.carmen.se>
Message-ID: <1140213665.105188.103450@o13g2000cwo.googlegroups.com>

Thank you very much, Magnus !
This is the answer I had been waiting for:
> A problem as I see it today, is that this behaviour is
> not actively encouraged. The tutorial, which is maintained
> and updated, still describes old style classes, and the
> old division behaviour.

My main point was/is:  why is there not more discussion about "true
division" !!?
Just like the second answer to my posting clearly showed:
PEOPLE THINK TRUE DIVISION IS "ONLY IN MATLAB"  !!

As you pointed out: the "true division" part of "Python3000" might be
one of the "scariest" and should therefore be pointed out already in
the tutorial !!  (It would look quite ugly to newcomers, though)

Having said that:  I would vote against EVER introducing true division
as default - because it will just PISS too many (long time python)
people OFF. ;-)

Thanks,
Sebastian Haase


Magnus Lycka wrote:
> seb.haase at gmail.com wrote:
> > Hi,
> > Is it true that that "Python 3000" is dead ?
>
> I think you should view Python 3000 as a metaphor for
> "Python as it would look if we didn't have to care about
> backward compatibility".
>
> Before this name appeared, Guido used to talk about
> Python 3.0 as a version where bad things in Python could
> go away, but it seems many people got worried about that,
> assuming that Python 3.0 would happen soon and cause a lot
> of changes in already written code. Thus the less scary
> label Python 3000. There has never been any concrete plans
> as far as I know to actually release a real software product
> called Python 3000. It's rather a long term design target
> for Python.
>
> A lot of these language changes can be introduced step
> be step. A new feature can be introduced first as an
> experimental feature, accessible via "from __future__
> import XYZ", in the next minor release, it might be
> enabled by default. If a feature or module is going away,
> the first step is to document it as deprecated. The next
> minor release will issue a PendingDeprecationWarning, and
> the minor release after that will issue a DeprecationWarning
> and the next minor release (2.4 -> 2.5 etc) will remove
> the feature. This will give developers a period of many
> years to adapt from the time the feature is documented as
> deprecated until maintenace ends for the last Python where
> the deprecated feature works.
>
> For an example of such a transition plan, see
> http://www.python.org/peps/pep-0352.html
>
> Changing the behaviour of int/int is worse, since there
> is no obvious way for Python to determine whether the
> programmer expects an int result, a float result or either.
> Also, the typical consequence of this change is not that
> code breaks with a big bang, but rather that it produces
> somewhat different results. That means that a bug due to
> this feature change might go unnoticed for a long time,
> and cause a lot of problems. Imagine some kind of system
> that calculates how much pension you'll get when you
> retire, based on your monthly payments. A bug caused by
> changed division behaviour might have serious consequences.
>
> It seems reasonable to wait until the next major release,
> 3.0, before this feature is introduced. In the mean time
> it seems that the strategy should be to encourage people
> to adopt the new behaviour in all new code, i.e. to use
> "from __future__ import division" and to explicitly use
> interger division a//b when this is needed.
>
> In the same way, people should be encouraged to always
> use new style classes, "class X(object):" in new code,
> since old style classes are going away, and they behave
> differently in some ways.
>
> A problem as I see it today, is that this behaviour is
> not actively encouraged. The tutorial, which is maintained
> and updated, still describes old style classes, and the
> old division behaviour.
>
> http://docs.python.org/dev/tut/node5.html#SECTION005110000000000000000
> http://docs.python.org/dev/tut/node11.html#SECTION0011300000000000000000
>
> I don't see any reason to use old style classes in new code,
> so I think all "class X:" should be changed to
> "class X(object):", but I can understand that it would be
> confusing to explain the use of "from __future__ import division"
> before we introduce simple arithmetics. Still, we should
> get this message through!
>
> As it is now, when people aren't actively moving their code
> towards this expected change, the impact of such a change
> would be almost as strong as if this "from __future_..."
> feature didn't exist.
>
> So, if I finally try to answer your question: Float division
> will hardly be enabled by default until most Python programmers
> have adopted the feature, i.e. enabled it through the
> __future__ switch and started to use // when they want floor
> division.
>
> This will hardly happen until it's documented as the way people
> should do it. Perhaps a start could be a FutureProofPython page
> in the Python wiki, with suggested coding guidelines.



From enterr at gmail.com  Tue Feb 14 22:39:41 2006
From: enterr at gmail.com (Atanas Banov)
Date: 14 Feb 2006 19:39:41 -0800
Subject: Soduku
References: <1139967167.960780.171360@o13g2000cwo.googlegroups.com>
	<mailman.1932.1139968309.27775.python-list@python.org>
Message-ID: <1139974781.396430.108910@g14g2000cwa.googlegroups.com>

you dont measure single run, you measure multiple runs using the
"timeit" module (for me 1000 repeats was about right).

here are some results which i recorded when i was implementing Sudoku
solver (on AMD Athlon 1.25GHz, using the sample shown on www.sudoku.com
front page):

brute: 		    1000 for 83 sec
smart:  	    1000 for 21 sec
brute, bitset: 	1000 for  29 sec
smart, bitset:	1000 for  7.0 sec
smart, bit+que:	1000 for 5.3 sec

so you see the algorithm makes big difference... and so does the data
structure used. i got 15x speed-up that way. i guess i can claim that
my solver runs the sample for 5.3s/1000 = 5.3 ms!

a friend was also implementing sudoku - this time in C - and his
program solves the sample 10000 times for 3.4sec (i.e. for 0.34ms) on
slightly faster machine - so let's say his **highly optimized** C code
is about 10x faster than mine.

- Nas



From ilias at lazaridis.com  Tue Feb 21 06:27:59 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 21 Feb 2006 13:27:59 +0200
Subject: - Copy dictionary entries to attributes
In-Reply-To: <1hazako.13jtm8o1u3h0z7N%aleaxit@yahoo.com>
References: <dt7kv6$dcn$1@usenet.otenet.gr>
	<1140319945.169944.31940@g14g2000cwa.googlegroups.com>
	<1hazako.13jtm8o1u3h0z7N%aleaxit@yahoo.com>
Message-ID: <dtetfu$btm$1@usenet.otenet.gr>

Alex Martelli wrote:
> Ben Wilson <dausha at gmail.com> wrote:
> 
>> Perhaps:
>>
>> def dictionary_make_attributes(self, settings):
>>      for k,v in settings:
>>          setattr(self, k, v)

for k,v in settings.items()

> This is a very general solution and will work for all kinds of objects
> with settable attributes, even if some of the attributes are properties,
> slots or weirder descriptors yet.
> 
> For plain vanilla class instances, though,
>   self.__dict__.update(settings)
> may be sufficient.
> 
> Alex

this is the construct I was looking for.

see it active:

http://pudge.lesscode.org/trac/changeset/118

http://pudge.lesscode.org/trac/ticket/16

.

-- 
http://lazaridis.com


From Lucabrocci at aol.com  Sat Feb 11 16:05:09 2006
From: Lucabrocci at aol.com (Lucabrocci at aol.com)
Date: Sat, 11 Feb 2006 16:05:09 EST
Subject: Hi reliability files, writing,reading,maintaining
Message-ID: <291.57f34fb.311fab85@aol.com>

Who said you could have my name?
 
Get ur own ,I know it's a great name but u still cant have  it!  
So start practicing your new signature.
                                                                              
Jokingly....... John J. Pote   
                                                                              
         
                                                                      PS:.... 
 "Good Luck in Prison!"
 
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From steve at holdenweb.com  Fri Feb 10 07:31:49 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 10 Feb 2006 07:31:49 -0500
Subject: a second TKinter
In-Reply-To: <1d987df30602100425n38faccefpaa4e6a2a3e8b568f@mail.gmail.com>
References: <1d987df30602100253x33aece59u425dd7d61c0ffa3f@mail.gmail.com>	<6f4025010602100256m5f390357o@mail.gmail.com>	<1d987df30602100320t4c61673ewfa6cd0f685a24bab@mail.gmail.com>	<dsi0gv$mpu$1@sea.gmane.org>
	<1d987df30602100425n38faccefpaa4e6a2a3e8b568f@mail.gmail.com>
Message-ID: <dsi13l$rsk$1@sea.gmane.org>

linda.s wrote:
> On 2/10/06, Steve Holden <steve at holdenweb.com> wrote:
> 
>>linda.s wrote:
>>
>>>On 2/10/06, Michael Foord <fuzzyman at gmail.com> wrote:
>>>
>>>
>>>>
>>>>On 10/02/06, linda.s <samrobertsmith at gmail.com> wrote:
>>>>
>>>>
>>>>>I found if I opened a second TKinter, Python will go out of work. But
>>>>>I need two graph outputs at the same time. What to do?
>>>>>Linda.
[...]
> 
> so run from the terminal?

Yes, but wouldn't just trying that have been easier than asking me? ;-)

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From nakpac at gmail.com  Thu Feb 23 18:24:52 2006
From: nakpac at gmail.com (nak)
Date: 23 Feb 2006 15:24:52 -0800
Subject: Concantenation and string slicing
References: <1140735316.752278.298490@v46g2000cwv.googlegroups.com>
Message-ID: <1140737092.542387.178050@i39g2000cwa.googlegroups.com>

add a dash like shown below

>>> print newMessage,



From hancock at anansispaceworks.com  Wed Feb 15 17:05:34 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Wed, 15 Feb 2006 16:05:34 -0600
Subject: Python, Forms, Databases
In-Reply-To: <1140030788.083799.45060@f14g2000cwb.googlegroups.com>
References: <1140030788.083799.45060@f14g2000cwb.googlegroups.com>
Message-ID: <20060215160534.40cde874@samwise.anansi>

On 15 Feb 2006 11:13:08 -0800
"Tempo" <bradfordh at gmail.com> wrote:
> Pyton and ASP together. The next solution I stumbled upon
> was to use Zope. However, I wasn't sure if I should spend
> more of my time looking into this or not, and I found a
> possible way around this, which is by using the CGI
> module.

CGI, "ick!" :-P

Zope, "mmm" :-)

Actually, it's a bit of a pain to get Zope installed on your
server (or conversely, to get a server you're allowed to put
Zope on).  But if you're willing to do that, it is going to
be *so* much easier to manage.

*If* you can do that, then it's a really simple way
to do what you want. This kind of thing is child's play once
you have a Zope site set up (you'll have to install a MySQL
Zope product, and possibly some helpful Zope products for
managing forms, if you don't want to do it the old-fashioned
way -- after that though, it's just
"throught-the-web" scripting).

But Zope is kind of a culture onto itself, so you may not
necessarily want to buy into it, if you don't do this kind
of thing often.

Just my two cents, of course,
Terry

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com


From vinjvinj at gmail.com  Fri Feb 17 14:55:51 2006
From: vinjvinj at gmail.com (vinjvinj)
Date: 17 Feb 2006 11:55:51 -0800
Subject: ANN: Release of NumPy 0.9.5
In-Reply-To: <mailman.2066.1140204768.27775.python-list@python.org>
References: <mailman.2028.1140135591.27775.python-list@python.org>
	<45ljqdF7706gU1@individual.net>
	<mailman.2044.1140171572.27775.python-list@python.org>
	<1140203632.748504.138390@g47g2000cwa.googlegroups.com>
	<mailman.2066.1140204768.27775.python-list@python.org>
Message-ID: <1140206151.184715.175950@o13g2000cwo.googlegroups.com>

I read some of the earlier threads which essentially said that numpy is
about 3-4 times slower then Numeric for smaller arrays. I'm assuming
that applies only to operations that apply to the whole arrays.

I was curious how the performance of the following operations would
compare though:
1. Copying arrays
2. Creating arrays
3. Slicing Arrays

In the mean time I'll install numpy and give it a spin.

>>Most, if not all, of the functions in scipy_base have been moved into numpy.

That's great. it would be great if I could remove the scipy_base
dependency. 

VJ



From jjreavis at gmail.com  Thu Feb 16 10:48:18 2006
From: jjreavis at gmail.com (Jeff  Reavis)
Date: 16 Feb 2006 07:48:18 -0800
Subject: Python, Forms, Databases
In-Reply-To: <1140030788.083799.45060@f14g2000cwb.googlegroups.com>
References: <1140030788.083799.45060@f14g2000cwb.googlegroups.com>
Message-ID: <1140104898.035867.203730@g14g2000cwa.googlegroups.com>

You should check out Spyce:
http://spyce.sourceforge.net/

It will work under CGI as well as Fast CGI, ModPython, or its own built
in server.

It also has an ASP/JSP like syntax:
http://spyce.sourceforge.net/docs/doc-lang_asp.html

If you plan on getting a new hosting company you might also want to
look at TurboGears and Django.

-jjr



From deets at nospam.web.de  Fri Feb 24 12:23:54 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 24 Feb 2006 18:23:54 +0100
Subject: Exception not raised
References: <43ff3fc8$0$29105$5fc30a8@news.tiscali.it>
Message-ID: <468ttdF9vr9mU1@uni-berlin.de>

Michele Petrazzo wrote:

> Simple example extract from my code:
> 
> #code
> def test():
> print type(t_fields), 11 in t_fields
> print t_fields[11]
> print "I'm here"
> 
> print "ok"
> test()
> print "ok"
> #end code
> 
> Output:
> 
> ok
> <type 'dict'> False
> 
> Here I see only one "ok" and not the "I'm here". The interpreter stop to
> run here, but the application continue to work!


Not here:

t_fields = {}
#code
def test():
  print type(t_fields), 11 in t_fields
  print t_fields[11]
  print "I'm here"

print "ok"
test()
print "ok"
#end code

Gives me 

python2.4 /tmp/test.py
ok
<type 'dict'> False
Traceback (most recent call last):
  File "/tmp/test.py", line 9, in ?
    test()
  File "/tmp/test.py", line 5, in test
    print t_fields[11]
KeyError: 11


So - whatever you do, there must be some other code capturing that
exception. Maybe you don't use dict, but a subclass of it?

Diez


From roy at panix.com  Mon Feb 20 17:01:06 2006
From: roy at panix.com (Roy Smith)
Date: Mon, 20 Feb 2006 17:01:06 -0500
Subject: Is inifinite loop not a good practice?
References: <43F9DF68.5020301@gmail.com>
	<mailman.2182.1140471719.27775.python-list@python.org>
Message-ID: <roy-40C65C.17010620022006@reader2.panix.com>

In article <mailman.2182.1140471719.27775.python-list at python.org>,
 "Terry Reedy" <tjreedy at udel.edu> wrote:

> "Alvin A. Delagon" <adelagon at gmail.com> wrote in message 
> news:43F9DF68.5020301 at gmail.com...
> > I've been hearing comments that infinite loop is a bad programming
> > practice.
> 
> What is bad is an *unintended* loop that goobles cpu time while outputting 
> nothing.  Example:
> 
> def fact(n):
>   res = 1
>   while n != 0:
>     res *= n
>     n -= 1
>   return res
> 
> fact(-1)
> 
> Now imagine that you are paying $360/hr ($.10/sec) (for IBM mainframe time) 
> and you should understand the bad reputation (and why jobs were submitted 
> with a time limit!). ;-)
> 
> Terry Jan Reedy

Could be worse.  You could have written:

def fact(n):
   if n == 0:
      return 1
   else:
     return n * fact (n-1)

then you would have not only gotten zonked on CPU charges, but on memory 
charges as well :-)


From codecraig at gmail.com  Thu Feb 16 12:53:34 2006
From: codecraig at gmail.com (abcd)
Date: 16 Feb 2006 09:53:34 -0800
Subject: Win32_Process.Create -- not starting process
In-Reply-To: <mailman.2010.1140104443.27775.python-list@python.org>
References: <mailman.2010.1140104443.27775.python-list@python.org>
Message-ID: <1140112414.375181.294460@f14g2000cwb.googlegroups.com>

Tim Golden wrote:
> BTW, I would recommend you either to use a raw string
> for that command line (r"c:\python\python.exe c:\xx.py") or
> to double up your slashes ("c:\\python\\python.exe c:\\xx.py").
> As it happens \p has no special meaning that I'm
> aware of, but better safe than sorry...


....i used double slashes, i guess i didn't type it correctly here.
Thanks for the reminder though.



From claudio.grondi at freenet.de  Thu Feb 23 05:25:32 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Thu, 23 Feb 2006 11:25:32 +0100
Subject: =?ISO-8859-1?Q?Re=3A_=27rar=27_is_not_recognized_as_?=
	=?ISO-8859-1?Q?an_internal_or_external_command=A3=BF=A3=BF=A3=BF?=
	=?ISO-8859-1?Q?=A3=BF?=
In-Reply-To: <dtjv4r$ma1$1@news.cn99.com>
References: <dtjv4r$ma1$1@news.cn99.com>
Message-ID: <dtk2j4$2ca$1@newsreader3.netcologne.de>

???????? wrote:
> 'rar' is not recognized as an internal or external command,
> operable program or batch file.
> 
> 
> import os
> import time
> source = [r'e:\temp\code',r'e:\temp\domains']
> target_dir = r'e:\temp\bak'
> target = target_dir+time.strftime('%Y%m%d%H%M%S')+'.rar'
> rar_cmd = "rar a -idcdp %s %s" % (target,' '.join(source))
> print rar_cmd
> if os.system(r'cd D:\Program Files\WinRAR') == 0:
>   if os.system(rar_cmd) == 0:
>     print 'Successful backup to',target
>   else:
>     print 'Backup Failed!'
> else:
>   print 'FAILED!!!'
> 
> 'rar' is not recognized as an internal or external command,
> operable program or batch file.
> 
> rar a -idcdp e:\temp\bak20060222191139.rar e:\temp\code e:\temp\domains
> Backup Failed!
It is always a good idea to use full path file location specs like:
rar_cmd = r"D:\Program Files\WinRAR\rar.exe a -idcdp %s %s" % (target,' 
'.join(source))
.
Have not tested it, but I suppose it will do the job.

Claudio
> 
> 
> but.........................
> 
> D:\>cd D:\Program Files\WinRAR
> 
> D:\Program Files\WinRAR>rar a -idcdp e:\temp\bak20060222191139.rar
> e:\temp\code
> e:\temp\domains
> 
> Creating archive e:\temp\bak20060222191139.rar
> 
> Adding    e:\temp\Code\Code\.classpath                                    OK
> Adding    e:\temp\Code\Code\.project                                      OK
> Adding    e:\temp\Code\Code\common\Code.class                             OK
> Adding    e:\temp\Code\Code\common\Code.java                              OK
> Adding    e:\temp\Code\Code\common                                        OK
> Adding    e:\temp\Code\Code                                               OK
> Adding    e:\temp\Code                                                    OK
> Adding    e:\temp\domains\examples.jar                                    OK
> Adding    e:\temp\domains\medrec.jar                                      OK
> Adding    e:\temp\domains\wls.jar                                         OK
> Adding    e:\temp\domains\wlw.jar                                         OK
> Adding    e:\temp\domains                                                 OK
> 
> D:\Program Files\WinRAR>
> 
> 
> 
> why?
> 
> 
> 
> 


From martin at v.loewis.de  Mon Feb 13 13:34:37 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 13 Feb 2006 19:34:37 +0100
Subject: Encoding
In-Reply-To: <1139853781.611888.60230@g44g2000cwa.googlegroups.com>
References: <1139853781.611888.60230@g44g2000cwa.googlegroups.com>
Message-ID: <43F0D13D.2070407@v.loewis.de>

Lad wrote:
> I have a script that uses utf-8 encoding. Now I would like to send some
> data to an application ( on another server) that uses 1250 encoding.
> How can I tell the server that the coming data will be in utf-8 code?

You can't, normally. In theory, you should put

Content-type: text/plain;charset=utf-8

into the individual *part*. However, many implementations will ignore
the charset= argument on a part.

Instead, the convention is that the data must be transmitted in the
encoding of the *HTML page* which contained the form you are submitting.

So most likely, you need to recode your data.

Regards,
Martin


From fredrik at pythonware.com  Mon Feb 13 03:25:24 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Feb 2006 09:25:24 +0100
Subject: How To Call A DLL?
References: <dspeuk$c7c$1@ns2.fe.internet.bosch.com>
Message-ID: <dspfpn$k1j$1@sea.gmane.org>

"Anand" <anand.pasoria at in.bosch.com> wrote:

> Can I get a code snippet of how to call a DLL and it's functionalities from
> Python?

start here:

    http://starship.python.net/crew/theller/ctypes/

(there's no standard mechanism in Python for calling functions in
DLLs, unless they're explicitly designed for Python, in which case
you can simply import them)

</F>





From tdelaney at avaya.com  Tue Feb  7 18:11:40 2006
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Wed, 8 Feb 2006 10:11:40 +1100
Subject: Too Many if Statements?
Message-ID: <2773CAC687FD5F4689F526998C7E4E5F07433B@au3010avexu1.global.avaya.com>

Terry Reedy wrote:

> The OP did not specify whether all of his if-tests were sequential as
> in your test or if some were nested.  I vaguely remember there being
> an indent limit (40??).

I'm pretty sure the OP has hit the python script line limit (32767?).

Goggle searches haven't turned up the actual limit for me unfortunately.
I suppose I could go check the code ...

Tim Delaney


From aleaxit at yahoo.com  Sun Feb  5 20:36:15 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 5 Feb 2006 17:36:15 -0800
Subject: Reverse of map()?
References: <1139187820.735831.240570@f14g2000cwb.googlegroups.com>
Message-ID: <1haardm.1krozue1esby5dN%aleaxit@yahoo.com>

Phillip Sitbon <phillip.sitbon at gmail.com> wrote:

> Hello there,
> 
> I have a situation where a list of functions need to be called with a
> single set of parameters and the result constructed into a tuple. I
> know there's simple ways to do it via list comprehension:
> 
> Result = tuple(  [ fn(* Args, ** Kwds) for fn in fn_list ]  )
> 
> I'd hope there's a more efficient way to do this with a built-in
> function, so that I could call:
> 
> Result = rmap( fn_list, * Args, ** Kwds )
> 
> and have it constructed as a tuple from the get-go.
> 
> Is there a built-in function that would allow me to do this, or do I
> have to go with the list comprehension?

A genexp is probably going to be more efficient than the list
comprehension: just omit the brackets in your first snippet.

map(apply, fn_list, ...) may work, but I doubt it's going to be either
simple or speedy since the ... must be replaced with as many copies of
Args and Kwds as there are functions in fn_list, e.g.:

map(apply, fn_list, len(fn_list)*(Args,), len(fn_list)*(Kwds))


There's no built-in that calls many functions with identical args and
kwds, since it's a rare need.  Also, map returns a list, not a tuple, so
it's bordering on the absurd to think that your dreamed-for rmap would
be designed to return a tuple rather than a list -- you still have to
call tuple on the result, any way you build it.


Alex


From aleaxit at yahoo.com  Thu Feb  2 23:05:14 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Thu, 2 Feb 2006 20:05:14 -0800
Subject: How do I dynamically create functions without lambda?
References: <1138389517.896043.7450@g47g2000cwa.googlegroups.com>
	<pan.2006.01.28.00.35.06.174939@REMOVETHIScyber.com.au>
	<1138436008.628882.126510@g44g2000cwa.googlegroups.com>
	<pan.2006.01.28.12.02.34.293286@REMOVETHIScyber.com.au>
	<drr978$oat$1@xenon.Stanford.EDU>
	<1ha3g79.1gcm6x1yziggyN%aleaxit@yahoo.com>
	<mailman.1358.1138907003.27775.python-list@python.org>
Message-ID: <1ha5e9r.gs34le12dm1luN%aleaxit@yahoo.com>

Benji York <benji at benjiyork.com> wrote:

> Alex Martelli wrote:
> > Disagree -- far more people THINK they're clever, than really ARE
> > clever.  According to a recent article in the Financial Times, over 40%
> > of a typical financial firm's employees firmly believe they are among
> > the 5% best employees of the firm -- and the situation, believe me, is
> > no different in programming.
> 
> It's apparently no different anywhere: 
> http://www.phule.net/mirrors/unskilled-and-unaware.html

Tx.  Maybe it's a genetically adaptive trait: the FT points out that
while there is little correlation between an employee's opinion of their
skills, and the employee's actual performance, there IS positive
correlation between said opinion and the employee's career advancement.
One way to explain the correlation is: if you truly (albeit perhaps
mistakenly) believe you're great, you project that and are more likely
to get promotions or raises, than is somebody else, perhaps objectively
better, who's torn by self-doubt and projects THAT.

My working hypothesis would be that this effect would be far stronger in
fields where it's hard to get hard quantitative measures of performance,
so the managers (or clients, etc) rely to a large extent on subjective
judgment which can be influenced by such "projections"...


Alex
 


From rschroev_nospam_ml at fastmail.fm  Wed Feb  1 08:41:33 2006
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Wed, 01 Feb 2006 13:41:33 GMT
Subject: triple quoted strings as comments
In-Reply-To: <roy-42D40A.08175201022006@reader2.panix.com>
References: <1138667355.631379.249770@o13g2000cwo.googlegroups.com>
	<drppbn$3rg$1@wake.carmen.se>
	<roy-42D40A.08175201022006@reader2.panix.com>
Message-ID: <hU2Ef.227454$7f1.7126132@phobos.telenet-ops.be>

Roy Smith schreef:
> Magnus Lycka <lycka at carmen.se> wrote:
>> An editor that adds/removes '# ' in the beginning of each
>> marked line is fairly bullet proof. Adding e.g. /* to the
>> beginning of a block you want to comment out, & */ to the
>> end, breaks if you have /* */ style comments in the block!
> 
> /* */ also allows for some truly spectacularly bad coding practices.  Not 
> long ago, I ran into some real-life code where a previous developer had 
> commented out about 50 lines of C++ code by just putting a /* at the top 
> and a */ at the bottom.  I was tearing my hair out trying to figure out how 
> the code worked until I noticed what he had done.

That happened to me a few times. These days I use an editor with syntax 
highlighting that shows comments in another color than code. That helps 
tremendously.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From ruby at no.spam  Sun Feb 26 21:56:24 2006
From: ruby at no.spam (Michal Kwiatkowski)
Date: Mon, 27 Feb 2006 03:56:24 +0100
Subject: Local variables initialization
In-Reply-To: <dttjb7$ba8$1@news.onet.pl>
References: <dttf62$qng$1@news.onet.pl>
	<1hbdjrw.1lrbcv8k3kcbsN%aleaxit@yahoo.com>
	<dttjb7$ba8$1@news.onet.pl>
Message-ID: <dttpln$vti$1@news.onet.pl>

Michal Kwiatkowski wrote:
> def init_arguments(fun):
>     def new_f(self):
>         var_one = self.attr_one
>         var_two = self.attr_two.another_attr
>         empty_list = []
> 
>         fun(self, var_one, var_two, empty_list)
> 
>     return new_f
> 
> @init_arguments
> def method(self, var_one, var_two, empty_list):
>     # significant code goes here
>     # ...
> 
> But the bad thing about this approach is that actual method doesn't
> really look like its definition, because of different number of arguments.

I've come up with a solution that don't have this disadvantage. Here we go:

def wrap_method(self, do):
    var_one = self.attr_one
    var_two = self.attr_two.another_attr
    empty_list = []

    return do(self, var_one, var_two, empty_list)

def method(self):
    def do(self, var_one, var_two, empty_list):
        # significant code goes here
        # ...
    return self.wrap_method(do)

All is implicit and have an advantage of being clear in < 2.4, where
there are no nice @ decorator syntax. Again, simple things proved to be
better. :)

mk
-- 
 . o .       >>  http://joker.linuxstuff.pl  <<
 . . o   It's easier to get forgiveness for being wrong
 o o o   than forgiveness for being right.


From duncanm255 at hotmail.com  Tue Feb 28 14:31:12 2006
From: duncanm255 at hotmail.com (D)
Date: 28 Feb 2006 11:31:12 -0800
Subject: Thread Question
Message-ID: <1141155072.500444.215130@v46g2000cwv.googlegroups.com>

I have a client application that I want (behind the scenes) to check
and make sure a remote host is up (i.e. by ping or TCP connect).  I'm
assuming that, since I want this to go on "unknowingly" to the user,
that I would put this in a thread.  My question is, how would I go
about creating the thread?  I have seen examples that used classes, and
other examples that just called one thread start command - when should
you use one over another?  Thanks in advance.

Doug



From s323 at mail.ru  Mon Feb 20 04:55:44 2006
From: s323 at mail.ru (Sergey)
Date: Mon, 20 Feb 2006 12:55:44 +0300
Subject: module time
Message-ID: <dtc3n1$e0j$1@news.rtcomm.ru>

There is function
mktime() -- convert local time tuple to seconds since Epoch
in module time.
But how about to convert *GMT time tuple* to seconds since Epoch?

Is there such function?




From saint.infidel at gmail.com  Fri Feb 17 09:08:04 2006
From: saint.infidel at gmail.com (infidel)
Date: 17 Feb 2006 06:08:04 -0800
Subject: Print a PDF transparently
In-Reply-To: <1140184955.674138.275010@o13g2000cwo.googlegroups.com>
References: <1140184955.674138.275010@o13g2000cwo.googlegroups.com>
Message-ID: <1140185284.869720.297830@o13g2000cwo.googlegroups.com>


Daniel Crespo wrote:
> Hi to all,
>
> I want to print a PDF right from my python app transparently. With
> "transparently" I mean that no matter what program handles the print
> petition, the user shouldn't be noticed about it.
>
> For example, when I want to print a PDF, Adobe Acrobat fires and keep
> opened. This is what I don't want to happen (and I thing there are a
> lot of people who want this too). So I just want to send the PDF to the
> right handler and print it. That's all.
>
> I've seen some things like Adobe's Postscript driver that can read a
> PDF, or Ghostscript, but I still don't know how to use it.
>
> Any help for printing a PDF transparently?

The only way I was able to find to do it (for free) was to install
GhostScript and GSView.  GSView comes with GSPrint.exe, which you can
call with a regular command line to send PDF files to a printer.  It
uses GhostScript for you behind the scenes because GhostScript is not
exactly the friendliest program to work with.



From larry.bates at websafe.com  Sat Feb 25 10:56:59 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Sat, 25 Feb 2006 09:56:59 -0600
Subject: Multiple threaded download streams?
In-Reply-To: <1140867665.749334.210370@v46g2000cwv.googlegroups.com>
References: <1140867665.749334.210370@v46g2000cwv.googlegroups.com>
Message-ID: <hOWdnRjDDIO5453ZRVn-rg@comcast.com>

gjzusenet at gmail.com wrote:
> Hello.
> Though Python supports threading, I think it is limited to python code
> - as soon as you issue a command that uses an external (C?) module, all
> of your python threads hang until this command returns.
> Is that true?
> I'm using urllib2 to download many files, and I have a double problem:
> 1. downloading all of them is painfully slow since it's serial - one
> has to finish before the next request gets sent.
> 2. my GUI becomes non responsive during the downloads - major problem!
> 
> Is there any way to work around that?
> I want to run multiple download streams, in parallel, and while keeping
> my program responsive.
> Are there alternative modules that I can use for that?
> 
> Any ideas?
> Thanks a lot!
> 
Others have spoken to the specifics of threads, etc.  What I wanted
to ask was why you think that parallel downloads will be faster?
Unless you are downloading from multiple and different sites and
your Internet download bandwidth is much greater than any individual
site you wish to download from, you won't speed things up.  If you
wish to download several files from the SAME site, I doubt that
threading is going to help.  Most likely you are limited by the
upload bandwidth of that site.  Now if the site you are downloading
from has some throttling turned on to limit the speed of an
individual download, you could gain some benefit.  You can't push
bits through the pipes faster than their upper bandwidth.

Just some thoughts to consider.

-Larry Bates


From mrstephengross at hotmail.com  Wed Feb 22 12:51:58 2006
From: mrstephengross at hotmail.com (mrstephengross)
Date: 22 Feb 2006 09:51:58 -0800
Subject: How to force creation of a .pyc?
Message-ID: <1140630718.197661.104730@o13g2000cwo.googlegroups.com>

I would like to distribute a python program, but only in .pyc form (so
that people cannot simply look at my code). Is there a way to do this?
I've read up a little on the logic by which python creates .pyc's, and
it sounds like python requires the main executed program to be in .py
format. Any ideas?

Thanks
--Steve (mrstephengross at hotmail.com)



From exarkun at divmod.com  Sat Feb 18 22:43:32 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Sat, 18 Feb 2006 22:43:32 -0500
Subject: Multiplication optimization
In-Reply-To: <1140310118.365847.111120@g14g2000cwa.googlegroups.com>
Message-ID: <20060219034332.6122.1302410015.divmod.quotient.2406@ohm>

On 18 Feb 2006 16:48:38 -0800, Paul McGuire <ptmcg at austin.rr.com> wrote:
>Does Python's run-time do any optimization of multiplication
>operations, like it does for boolean short-cutting?

Here's the beginning of int_mul from Objects/intobject.c:

    static PyObject *
    int_mul(PyObject *v, PyObject *w)
    {
        long a, b;
        long longprod;                  /* a*b in native long arithmetic */
        double doubled_longprod;        /* (double)longprod */
        double doubleprod;              /* (double)a * (double)b */

        CONVERT_TO_LONG(v, a);
        CONVERT_TO_LONG(w, b);
        longprod = a * b;
        doubleprod = (double)a * (double)b;
        doubled_longprod = (double)longprod;

I think the rest of the function is probably irrelevant, as far as your question goes.

Jean-Paul


From bdesth.quelquechose at free.quelquepart.fr  Mon Feb 13 21:50:11 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 14 Feb 2006 03:50:11 +0100
Subject: invert the order of a string
In-Reply-To: <7xek26erf0.fsf@ruckus.brouhaha.com>
References: <dsr600$9sj$1@solaris.cc.vt.edu>
	<7xek26erf0.fsf@ruckus.brouhaha.com>
Message-ID: <43f125ba$0$1742$636a55ce@news.free.fr>

Paul Rubin a ?crit :
> rtilley <rtilley at vt.edu> writes:
> 
>>s = list('some_random_string')
>>print s
>>s.reverse()
>>print s
>>s = ''.join(s)
>>print s
>>
>>Surely there's a better way to do this, right?
> 
> 
> In Python 2.4, just say
>   s = reversed('some_random_string')

Python 2.4.1 (#1, Jul 23 2005, 00:37:37)
[GCC 3.3.4 20040623 (Gentoo Linux 3.3.4-r1, ssp-3.3.2-2, pie-8.7.6)] on 
linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> reversed('some_random_string')
<reversed object at 0x4040f30c>
 >>>

Yes, that was my first take too - but I jumped to my Python shell before 
posting !-)


From sam at nuevageorgia.com  Tue Feb 28 12:38:05 2006
From: sam at nuevageorgia.com (SamFeltus)
Date: 28 Feb 2006 09:38:05 -0800
Subject: Python and Flash
In-Reply-To: <1141136533.215656.290800@i39g2000cwa.googlegroups.com>
References: <1139230361.675896.241920@z14g2000cwz.googlegroups.com>
	<1139235297.903689.244030@z14g2000cwz.googlegroups.com>
	<1139407620.948877.5820@g14g2000cwa.googlegroups.com>
	<1141101898.725832.104260@e56g2000cwe.googlegroups.com>
	<1141102008.086764.24550@j33g2000cwa.googlegroups.com>
	<slrne0824e.9s8.sybrenUSE@schuimige.unrealtower.org>
	<1141136533.215656.290800@i39g2000cwa.googlegroups.com>
Message-ID: <1141148285.499150.325180@j33g2000cwa.googlegroups.com>

By the way Sybren, if you don't mind, what kinda computer and browser
were you using, trying to figure out which browsers get redirected to
html and which get the Flash Site.  If you have Flash plugin, what
version was it?

Thanks,

Sam the Gardener



From MrJean1 at gmail.com  Sun Feb 12 04:10:07 2006
From: MrJean1 at gmail.com (MrJean1)
Date: 12 Feb 2006 01:10:07 -0800
Subject: PySizeof: almost useful
In-Reply-To: <mailman.1731.1139620446.27775.python-list@python.org>
References: <mailman.1731.1139620446.27775.python-list@python.org>
Message-ID: <1139735407.024752.179620@g14g2000cwa.googlegroups.com>

Check the sizeof() method in the mxTools package from eGenix:

  <http://www.egenix.com/files/python/mxTools.html>

/Jean Brouwers



From modelnine at bit-bukket.org  Thu Feb 16 11:10:43 2006
From: modelnine at bit-bukket.org (Heiko Wundram)
Date: Thu, 16 Feb 2006 17:10:43 +0100
Subject: pythonic way of 'b = list(a); b.append(4)"
References: <1140105883.069632.262530@g43g2000cwa.googlegroups.com>
Message-ID: <dt280f$o8q$1@online.de>

szabi wrote:
> a = [1, 2, 3]
> f(*a, 4)

f(*(a+[4]))

--- Heiko.


From vania.smirk at gmail.com  Tue Feb 14 09:15:22 2006
From: vania.smirk at gmail.com (VSmirk)
Date: 14 Feb 2006 06:15:22 -0800
Subject: hard disk activity
In-Reply-To: <mailman.1886.1139904325.27775.python-list@python.org>
References: <1139850420.902979.71620@o13g2000cwo.googlegroups.com>
	<g9i1v1lbf2rhmgskmkh5f9mt73s67umckk@4ax.com>
	<1139857505.376840.37440@g43g2000cwa.googlegroups.com>
	<1139859890.407497.124870@o13g2000cwo.googlegroups.com>
	<1139863885.755813.324450@g47g2000cwa.googlegroups.com>
	<7xfymn0yda.fsf@ruckus.brouhaha.com>
	<1139864840.300396.170070@o13g2000cwo.googlegroups.com>
	<7xbqxb0xo0.fsf@ruckus.brouhaha.com>
	<mailman.1886.1139904325.27775.python-list@python.org>
Message-ID: <1139926522.747947.69080@o13g2000cwo.googlegroups.com>

Terry,

Yeah, I was sketching out a scenario much like that.  It does break
things down pretty well, and that gets my file sync scenario up to much
larger files.  Even if many changes are made to a file, if you keep
track of the number of bytes and checksum over from 1 to the number of
bytes different by shifting the sequence ( that is [abcd]ef, a[bced]f,
ab[cdef]), until a checksum is a match again, you should be able to
find some point where the checksums match again and you can continue up
(or down) doing only the checksums again without all the overhead.

The question in my mind that I will have to test is how much overhead
this causes.

One of the business rules underlying this task is to work with files
that are being continuously written to, say by logging systems or
database servers.  This brings with it some obvious problems of file
access, but even in cases where you don't have file access issues, I am
very concerned about race conditions where one of the already-handled
blocks of data are written to.  The synched copy on the remote system
now no longer represents a true image of the local file.

This is one of the reasons I was looking into a device-level solution
that would let me know when a hard disk write had occurred.  One
colleagues suggested I was going to have to write assembler to do this,
and I may have to ultimately just use the solutions described here for
files that don't have locking and race-condition issues.

Regardless, it's a fun project, and I have to say this list is one of
the more polite lists I've been involved with.  Thanks!

V



From ptmcg at austin.rr._bogus_.com  Thu Feb  2 13:50:51 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Thu, 02 Feb 2006 18:50:51 GMT
Subject: learning python, using string help
References: <1138906062.727850.177960@g14g2000cwa.googlegroups.com>
Message-ID: <fwsEf.24314$1%5.18129@tornado.texas.rr.com>


<mikeisgreat at gmail.com> wrote in message
news:1138906062.727850.177960 at g14g2000cwa.googlegroups.com...
> hi all,
>
> I have a simple snippet I am trying to keep the format the same as
> plain text, though I want to embed it in html ...
>
> basically,
>
> print "Content-type:text/plain\n\n";
> getrup = os.popen('ruptime').read()
> print getrup
>
> is the same format as if I ran 'ruptime' from the command line.
>
> If I use...
>
> print "Content-type:text/html\n\n";
> getrup = os.popen('ruptime').read()
> print getrup
>
> I can just split the lines and loop through it ... but I am not sure
> how to keep the tab spacing the same
> I'm sure its something so simple I am missing ....
>
> thanks for helping someone learning..
> --mike
>
What about :

print "Content-type:text/html\n\n";
print "<pre>"
getrup = os.popen('ruptime').read()
print getrup
print "</pre>"

The <pre> tags indicate that the enclosed text has been pre-formatted.
Otherwise your tabs will get collapsed out by HTML.

-- Paul




From nas-usenet at arctrix.com  Sat Feb  4 22:31:24 2006
From: nas-usenet at arctrix.com (Neil Schemenauer)
Date: Sun, 05 Feb 2006 03:31:24 GMT
Subject: Generators vs. Functions?
References: <0001HW.C00ABC2B000323A6F0335550@news.individual.de>
	<43E50E73.40504@kzoo.edu>
	<mailman.1426.1139097119.27775.python-list@python.org>
Message-ID: <gkeFf.434944$2k.218378@pd7tw1no>

Peter Hansen <peter at engcorp.com> wrote:
> More precisely, the state of the function is *saved* when a yield 
> occurs, so you certainly don't *recreate* it from scratch, but merely 
> restore the state, and this should definitely be faster than creating it 
> from scratch in the first place.

Right.  Resuming a generator is faster than calling a function.

  Neil


From lee at example.com  Wed Feb  1 16:48:36 2006
From: lee at example.com (Lee Harr)
Date: Wed, 01 Feb 2006 21:48:36 GMT
Subject: load module named "datetime" and change the directory of output
	file?
References: <mailman.1314.1138805647.27775.python-list@python.org>
Message-ID: <_%9Ef.13064$qg.11955@news01.roc.ny>

> 1. How can I add a standard module named "datetime" in
> Jython when the error happens :"Traceback (innermost
> last):
>   File "C:\python\test.py", line 3, in ?
> ImportError: no module named datetime "
>  The line 3 is writen: "from datetime import datetime,
> tzinfor"
>

The datetime module was added with Python 2.3. I think
that Jython is still at the 2.1 or 2.2 level of Python.

I believe that the Jython team is pretty far along the
path to Python 2.4, but that is probably a question best
asked on one of their lists.



> 2. I hope test.py outputs a file like test.txt, but I
> want to change the directory of the result file named
> test.txt. for example, the result is in
> c:\python\test.txt, but I want to put it in
> c:\python\result\test.txt. How can I change the
> directory in java?
>


Sort of depends on how you are writing the output.
You could do something like ...

fh = open(r"c:\python\result\test.txt", "w")
fh.write("something")

right?

What does your code look like now? It is easier to
help you fix it than to start fresh....


From steve at REMOVETHIScyber.com.au  Thu Feb 23 17:04:05 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 24 Feb 2006 09:04:05 +1100
Subject: Unexpected timing results
References: <pan.2006.02.23.15.38.11.944281@REMOVETHIScyber.com.au>
	<43FDDDB2.7050703@websafe.com>
Message-ID: <pan.2006.02.23.22.04.04.778895@REMOVETHIScyber.com.au>

On Thu, 23 Feb 2006 10:07:14 -0600, Larry Bates wrote:

>> Of course I expect timer2 should take longer to execute in total,
>> because it is doing a lot more work. But it seems to me that all that
>> extra work should not affect the time measured, which (I imagine) should
>> be about the same as timer1. Possibly even less as it isn't timing the
>> setup of the for loop.

...

> In timer2 you are making a million extra calls to timer()
> function and doing a million additions and a million
> subtractions that are not being done in timer1() function.
> I think that is where your "extra" time is located.

But those extra additions, subtractions, etc. are not being timed, because
they are outside the part where the stopwatch is ticking, in a manner of
speaking.

I know that timer2 will take longer to execute than timer1. That's not
the surprising bit. But I'm not measuring all the execution time, only
part of it, and not all that execution time is being timed.

The only extra work I can see is a call to timer() each loop. The first
call shouldn't count, because it happens before the clock starts. Is
calling time.time() really such as expensive operation, especially when
I've rebound the name so as to avoid a name lookup?

I guess it is: I've run two more tests, both going back to the form of
timer1, but changing the function being timed. The first uses math.sin.
The second uses time.timer.

Here is the code:

def timer3():
    timer = time.time
    func = math.sin
    itr = [None] * 1000000
    t0 = timer()
    for _ in itr:
        func(0.1)
    t1 = timer()
    return t1 - t0

def timer4():
    timer = time.time
    func = timer
    itr = [None] * 1000000
    t0 = timer()
    for _ in itr:
        func()
    t1 = timer()
    return t1 - t0

And the results:

>>> timer.timer3()
0.64760088920593262
>>> timer.timer4()
5.2274949550628662



It looks like the time function under Linux at least is very slow.


-- 
Steven.



From andy at nospam.com  Fri Feb  3 06:13:01 2006
From: andy at nospam.com (Andy Sy)
Date: Fri, 03 Feb 2006 19:13:01 +0800
Subject: fixedint.py enhanced for auto-coercion (fixed-width python integers)
Message-ID: <43E33ABD.2030403@nospam.com>

Hi Dan,

I find that when doing bit-twiddling in pure Python,
fixed-width integer support is an extremely handy
capability to have in Python regardless of what
the apologists (for its absence) say.


I added some stuff to fixedint.py to make

>>> x=SByte(80)
>>> x+200
fixedint.SignedType(8)(24)

the above work.  Perhaps you can review the
code to see if there are any major flaws in it?


Right after I started using it, I realized
there has to be a lot more thought put into
the conventions for the coecion rules.  What
should

>>> x=SByte(80)
>>> 200+x

return for example... ?





-----  START OF CODE -----


import operator

def _toFixedUnsigned(n, b):
   "Truncate n to a b-bit unsigned long."
   return n & ((1L << b) - 1)    # bitmask of b 1's

def _toFixedSigned(n, b):
   "Truncate n to a b-bit signed long."
   result = _toFixedUnsigned(n, b)
   if result >= (1L << b - 1):   # More than "maxint"?
      result -= 1L << b          # Then wrap around.
   return result

class _Integer(object):
   "Abstract base class for SignedType and UnsignedType."
   # Numeric conversions
   def __long__(self):
      return self._value
   def __int__(self):
      return int(self._value)
   def __float__(self):
      return float(self._value)
   def __nonzero__(self):
      return self._value != 0
   # String conversions.
   def __str__(self):
      return str(self._value)
   # Arithmetic
   def __pos__(self):
      return self
   def __neg__(self):
      return type(self)(-self._value)
   def __add__(self, other):
      if isinstance(other, type(self)):
        return type(self)(self._value + other._value)
      else:
        return type(self)(self._value + self.__class__(other)._value)
   def __sub__(self, other):
      if isinstance(other, type(self)):
        return type(self)(self._value - other._value)
      else:
        return type(self)(self._value - self.__class__(other)._value)
   def __mul__(self, other):
      if isinstance(other, type(self)):
        return type(self)(self._value * other._value)
      else:
        return type(self)(self._value * self.__class__(other)._value)
   def __floordiv__(self, other):
      if isinstance(other, type(self)):
        return type(self)(self._value // other._value)
      else:
        return type(self)(self._value // self.__class__(other)._value)
   def __mod__(self, other):
      if isinstance(other, type(self)):
        return type(self)(self._value % other._value)
      else:
        return type(self)(self._value % self.__class__(other)._value)
   def __divmod__(self, other):
      return self // other, self % other
   # Relational
   def __cmp__(self, other):
      return cmp(long(self), other)
   # Bit-bashing
   def __lshift__(self, other):
      return type(self)(self._value << other)
   def __rshift__(self, other):
      return type(self)(self._value >> other)
   def __invert__(self):
      return type(self)(~self._value)
   def __and__(self, other):
      if isinstance(other, type(self)):
        return type(self)(self._value & other._value)
      else:
        return type(self)(self._value & self.__class__(other)._value)
   def __or__(self, other):
      if isinstance(other, type(self)):
        return type(self)(self._value | other._value)
      else:
        return type(self)(self._value | self.__class__(other)._value)
   def __xor__(self, other):
      if isinstance(other, type(self)):
        return type(self)(self._value ^ other._value)
      else:
        return type(self)(self._value ^ self.__class__(other)._value)

_utypes = {}

def UnsignedType(bits):
   "Returns a fixed-width unsigned int type with the given number of bits."
   if bits in _utypes:
      return _utypes[bits]
   else:
      class unsigned(_Integer):
        __doc__ = '%d-bit unsigned integer type' % bits
        def __init__(self, value):
          self._value = _toFixedUnsigned(value, bits)
        def __repr__(self):
          return 'fixedint.UnsignedType(%d)(%d)' % (bits, self._value)
      return unsigned

Byte = UnsignedType(8)
UShort = UnsignedType(16)
UInt = UnsignedType(32)
ULong = UnsignedType(64)

_stypes = {}

def SignedType(bits):
   "Returns a fixed-width signed int type with the given number of bits."
   if bits in _stypes:
      return _stypes[bits]
   else:
      class signed(_Integer):
        __doc__ = '%d-bit signed integer type' % bits
        def __init__(self, value):
          self._value = _toFixedSigned(value, bits)
        def __repr__(self):
          return 'fixedint.SignedType(%d)(%d)' % (bits, self._value)
      return signed

SByte = SignedType(8)
Short = SignedType(16)
Int = SignedType(32)
Long = SignedType(64)



From DavidPorterHolt at acm.org  Tue Feb 21 12:27:49 2006
From: DavidPorterHolt at acm.org (DavidPorterHolt)
Date: 21 Feb 2006 09:27:49 -0800
Subject: Exceptions
In-Reply-To: <DLHKf.22568$UN2.8151@tornado.texas.rr.com>
References: <1140540154.522838.193020@g14g2000cwa.googlegroups.com>
	<1140540525.032755.209460@g47g2000cwa.googlegroups.com>
	<DLHKf.22568$UN2.8151@tornado.texas.rr.com>
Message-ID: <1140542869.048735.201040@z14g2000cwz.googlegroups.com>

That's good to know. Thanks.



From fuzzyman at gmail.com  Wed Feb  8 05:27:43 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 8 Feb 2006 02:27:43 -0800
Subject: module with __call__ defined is not callable?
In-Reply-To: <pan.2006.02.08.10.21.24.46790@REMOVETHIScyber.com.au>
References: <mailman.1580.1139367500.27775.python-list@python.org>
	<pan.2006.02.08.10.21.24.46790@REMOVETHIScyber.com.au>
Message-ID: <1139394463.255902.168960@f14g2000cwb.googlegroups.com>


Steven D'Aprano wrote:
> On Wed, 08 Feb 2006 13:58:13 +1100, Delaney, Timothy (Tim) wrote:
>
> > adam johnson wrote:
> >
> >> Hi All.
> >> I was wondering why defining a __call__ attribute for a module
> >> doesn't make it actually callable.
> >
> > For the same reason that the following doesn't work
> [snip example]
> > The __call__ attribute must be defined on the class (or type) - not on
> > the instance. A module is an instance of <type 'module'>.
>
> That's not a _reason_, it is just a (re-)statement of fact. We know that
> defining a __call__ method on a module doesn't make it callable. Why not?
> The answer isn't "because defining a __call__ method on a module or an
> instance doesn't make it callable", that's just avoiding the question.
>
> Someone had to code Python so that it raised an error when you try to call
> a module object. Is there a reason why module() should not execute
> module.__call__()? I would have thought that by the duck typing principle,
> it shouldn't matter whether the object was a class, a module or an int, if
> it has a __call__ method it should be callable.
>

It would nice if you could make modules callable.

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml

> 
> -- 
> Steven.



From paddy3118 at netscape.net  Tue Feb 14 03:06:38 2006
From: paddy3118 at netscape.net (Paddy)
Date: 14 Feb 2006 00:06:38 -0800
Subject: how do you pronounce 'tuple'?
In-Reply-To: <ieGdnftVlNuA3WzenZ2dnUVZ_t2dnZ2d@speakeasy.net>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
	<mailman.1857.1139863723.27775.python-list@python.org>
	<ieGdnftVlNuA3WzenZ2dnUVZ_t2dnZ2d@speakeasy.net>
Message-ID: <1139904398.126243.11020@z14g2000cwz.googlegroups.com>


(dupple, supple, zupple) = (2,1,0) # :-)



From blair.houghton at gmail.com  Wed Feb  1 23:56:33 2006
From: blair.houghton at gmail.com (Blair P. Houghton)
Date: 1 Feb 2006 20:56:33 -0800
Subject: webbrowser module + urls ending in .py = a security hole?
References: <1138593557.824516.116400@g14g2000cwa.googlegroups.com>
	<1138626217.999480.153140@g43g2000cwa.googlegroups.com>
	<1138651762.673682.192210@g43g2000cwa.googlegroups.com>
	<mailman.1242.1138654889.27775.python-list@python.org>
Message-ID: <1138856193.857136.196670@g47g2000cwa.googlegroups.com>

>Would it be sufficient in your case merely to allow only .html files to
>be loaded?  Or URLs without .extensions?  Or even just permit only the
>http: protocol?

Personally, I'm just noodling around with this right now.
So "my case" is the abstract case.  I think the solution if
one was needed would be to look at how something like
Firefox implements script detection and warns about it,
so all forms of scripts would be rejected.

I did try loading the .py file over a remote connection, and
it does seem to work as expected that way; i.e., I get a
browser window with the text of the script.  So the
webbrowser.py module's handling of http:// accesses
is definitely different from its handling of  file://  accesses.

--Blair



From bencvt at gmail.com  Tue Feb 21 20:28:38 2006
From: bencvt at gmail.com (Ben Cartwright)
Date: 21 Feb 2006 17:28:38 -0800
Subject: a little more help with python server-side scripting
In-Reply-To: <59edncmGm6g2LmbeRVn-pw@rcn.net>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
Message-ID: <1140571718.278297.105080@f14g2000cwb.googlegroups.com>

John Salerno wrote:
> I contacted my domain host about how Python is implemented on their
> server, and got this response:
>
> -------------------
> Hello John,
>
> Please be informed that the implementation of python in our server is
> through mod_python integration with the apache.
>
> These are the steps needed for you to be able to run .py script directly
> from browser for your webpage:
>
> 1. Please use the below mentioned path for python:
> #!/usr/bin/env python
>
> Furthermore, update us with the script path, so that we can set the
> appropriate ownership and permissions of the script on the server.
>
> If you require any further assistance, feel free to contact us.
> -----------------------
>
> Unfortunately, I don't completely understand what it is I need to do
> now. Where do I put the path they mentioned? And what do they mean by my
> script path?


The Python tutorial should fill in the blanks
(http://www.python.org/doc/tut/node4.html):
> 2.2.2 Executable Python Scripts
>
> On BSD'ish Unix systems, Python scripts can be made directly executable,
> like shell scripts, by putting the line
>
>   #! /usr/bin/env python
>
> (assuming that the interpreter is on the user's PATH) at the beginning
> of the script and giving the file an executable mode. The "#!" must be
> the first two characters of the file. On some platforms, this first line
> must end with a Unix-style line ending ("\n"), not a Mac OS ("\r") or
> Windows ("\r\n") line ending. Note that the hash, or pound, character,
> "#", is used to start a comment in Python.

This answers your first question.  Put the #! bit at the top of your
.py script.  This way the web server will know how to run the script.

> The script can be given a executable mode, or permission, using the
> chmod command:
>
>   $ chmod +x myscript.py

And this answers your second.  Your host needs to know the path to your
script so they can use chmod to make it executable.

--Ben



From bonono at gmail.com  Mon Feb 20 04:33:36 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 20 Feb 2006 01:33:36 -0800
Subject: Quesion about the proper use of __slots__
In-Reply-To: <dtc219$h0a$01$1@news.t-online.com>
References: <1140424508.393412.79140@o13g2000cwo.googlegroups.com>
	<43f9825e$0$4777$636a55ce@news.free.fr>
	<1140426860.033363.237150@o13g2000cwo.googlegroups.com>
	<dtc219$h0a$01$1@news.t-online.com>
Message-ID: <1140428016.170547.315710@g47g2000cwa.googlegroups.com>


Peter Otten wrote:
> Zefria wrote:
>
> > Also, I don't generally do any optimization at all yet (as a highschool
> > student projects get trashed often enough no to bother over), but in
> > this special case I'm expecting each "carrier" to have up to 150
> > fighters, and 3 to 5 carriers for each of the two teams, which comes
> > out to be quite large.
>
> However, 'large numbers' are more likely to start (picture me looking out of
> the window) at 100,000 than 10,000 in this context -- and you are at 750...
>
He could be working on a machine with < 1M RAM or some other
constraints.



From steve at REMOVETHIScyber.com.au  Thu Feb 23 10:40:38 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 24 Feb 2006 02:40:38 +1100
Subject: formatted string like--->  u'720 S'
References: <mailman.2353.1140707577.27775.python-list@python.org>
Message-ID: <pan.2006.02.23.15.40.38.104986@REMOVETHIScyber.com.au>

On Thu, 23 Feb 2006 08:00:16 -0700, Bell, Kevin wrote:

> I'm building a dictionary from values a database and upon print the
> dictionary I see key value pairs like this:
> 
> u'Briarcliff' : [u'2500 E'],
> u'Shumway' : [ u'2600 E']
> 
> do I need to slice off the "u", or anything?  I know it has something to
> do with unicode but I don't know how to treat it.

No. The u is part of the display of the string, just like the quote marks. 

Ordinary strings are printed with ' ' delimiters.
Unicode strings are printed with u' ' delimiters.



-- 
Steven.



From scott.daniels at acm.org  Sun Feb 26 20:54:09 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sun, 26 Feb 2006 17:54:09 -0800
Subject: Memory allocation in for loops
In-Reply-To: <dtt8fm$2tm$1@news.hispeed.ch>
References: <1134298072.537702.158870@g49g2000cwa.googlegroups.com>
	<CqCdnaHz040sRAHeRVn-vg@comcast.com> <dtt8fm$2tm$1@news.hispeed.ch>
Message-ID: <44025a09$1@nntp0.pdx.net>

invitro81 wrote:
> Which one is better w.r.t. memory allocation but also w.r.t. speed:
> ## 1.1 ##
> def forloop(a,b):
>     for idx in range(a,b):
>         ...
Above preferred to next (for readability) using xrange may help speed 
depending.

> ## 1.2 ##
> def whileloop(a,b):
>     idx = a
>     while idx < b:
>         ...
>         idx += 1

> def forloop(a,b,lst):
>     for idx in lst.sort():
>         ...
This one just doesn't work.  the sort method on a list causes a
side-effect of sorting the list, and then returns None to remind you.

   def forloop(a,b,lst):
       lst = list(lst) # if you don't want to mangle the original)
       lst.sort()
       for idx in lst:
           ...

With the new-fangled (2.4 or greater) Python, you could use sorted:
   def forloop(a,b,lst):
       for idx in sorted(lst):
           ...

Your other questions were correctly answered elsewhere


--Scott David Daniels
scott.daniels at acm.org


From nospam at yahoo.com  Wed Feb 15 09:29:31 2006
From: nospam at yahoo.com (Grant Griffin)
Date: Wed, 15 Feb 2006 08:29:31 -0600
Subject: how do you pronounce 'tuple'?
In-Reply-To: <mailman.1905.1139931613.27775.python-list@python.org>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>	<11v032ii4gvik72@corp.supernews.com>	<1139816300.706181.79250@f14g2000cwb.googlegroups.com>
	<mailman.1905.1139931613.27775.python-list@python.org>
Message-ID: <87d36$43f33ac1$4088dbc7$20582@EVERESTKC.NET>

Tim Peters wrote:
...
> "tuhple" is a girly-man affectation.  That's why Guido and I both say
> the manly "toople".
...

Yes, but doesn't Guido say 'Guido' with some sort of strange faux-manly 
'H'-ish sortta sound?

methinks-the-lady-doth-protest-too-much-ly y'rs,

=g2
-- 
_____________________________________________________________________

Grant R. Griffin
Publisher of dspGuru                           http://www.dspguru.com
Iowegian International Corporation            http://www.iowegian.com
See http://www.iowegian.com/img/contact.gif for e-mail address


From cjw at sympatico.ca  Sun Feb 19 15:52:02 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Sun, 19 Feb 2006 15:52:02 -0500
Subject: editor for Python on Linux
In-Reply-To: <chlhv15ktc4u3adv34sgk63tok5vl9j50q@4ax.com>
References: <dtai6e$23m$2@ariane.blic.net>
	<chlhv15ktc4u3adv34sgk63tok5vl9j50q@4ax.com>
Message-ID: <43F8DA72.8040808@sympatico.ca>

Rene Pijlman wrote:
> Mladen Adamovic:
> 
>>I wonder which editor or IDE you can recommend me for writing Python 
>>programs.
> 
> 
> vi
> 
Scite is a good editor.  It is available for both Windows and Linux.
Boa-Constructor is an IDE rather than an editor.  Although it focuses
on wxPython, it has a good editor.

Colin W


From godoy at ieee.org  Sun Feb  5 10:44:58 2006
From: godoy at ieee.org (Jorge Godoy)
Date: Sun, 05 Feb 2006 13:44:58 -0200
Subject: Importing a class, please help...
References: <a1pFf.138$CO7.124@fe02.lga>
Message-ID: <87fymxolmt.fsf@ieee.org>

"anon" <anon at nospam.nospam> writes:

> to do an Import on it.  This is where things fail.  I cannot see the 
> contents of my Jar.  What am I missing here?

That JARs are for Java and yo're using Python?


-- 
Jorge Godoy      <godoy at ieee.org>

"Quidquid latine dictum sit, altum sonatur."
- Qualquer coisa dita em latim soa profundo.
- Anything said in Latin sounds smart.


From luismgz at gmail.com  Wed Feb 22 13:36:04 2006
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 22 Feb 2006 10:36:04 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com> <43fbc788@usenet01.boi.hp.com>
	<87u0ar3gba.fsf@wilson.homeunix.com>
	<pan.2006.02.22.11.35.14.90948@REMOVETHIScyber.com.au>
	<1140612537.685150.68330@o13g2000cwo.googlegroups.com>
	<7xu0arbkwd.fsf@ruckus.brouhaha.com>
	<mailman.2301.1140617846.27775.python-list@python.org>
Message-ID: <1140633364.333444.241520@g43g2000cwa.googlegroups.com>

Carl Friedrich Bolz wrote:
> Paul Rubin wrote:
> Well. "... the PyPy team works on ..." is definitively much too strong.
> It is more like "... the PyPy team is thinking about ...". It is very
> unclear whether it will work on a technical level and whether the EU
> will allow us to allocate resources accordingly.

In this thread
http://groups.google.com/group/comp.lang.python/msg/5132f0d48c9e7be9
Christian Tismer said that he would work on this, even if this is not
pursued by the Pypy team, because he has personal reasons for doing it.

So I'm confident that sooner or later, it will be possible to create
extension modules written in Rpython.



From steve at REMOVETHIScyber.com.au  Sat Feb 18 10:02:31 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sun, 19 Feb 2006 02:02:31 +1100
Subject: commenting out blocks of code
References: <20060217231846.87613.qmail@web36708.mail.mud.yahoo.com>
	<mailman.2077.1140221554.27775.python-list@python.org>
	<pan.2006.02.18.01.36.05.856023@REMOVETHIScyber.com.au>
	<JiwJf.10683$yK1.3804@news-server.bigpond.net.au>
Message-ID: <pan.2006.02.18.15.02.31.106848@REMOVETHIScyber.com.au>

On Sat, 18 Feb 2006 03:14:49 +0000, Neil Hodgson wrote:

>     I am the developer responsible for SciTE and the Ctrl+Q decision.
> Ctrl+Q is not reserved for Quit on every platform. 

[snip]


Thank you for your thoughtful response. Although I'm not convinced by your
reasoning, I will concede that perhaps my post was a little hasty.


-- 
Steven.



From om at oliviermigeon.com  Thu Feb 16 12:17:12 2006
From: om at oliviermigeon.com (Olivier)
Date: Thu, 16 Feb 2006 18:17:12 +0100
Subject: mod_python help!
In-Reply-To: <1140099406.395361.293670@z14g2000cwz.googlegroups.com>
References: <1140099406.395361.293670@z14g2000cwz.googlegroups.com>
Message-ID: <43f4b2d4$0$27142$626a54ce@news.free.fr>

treelife a ?crit :
> I'm getting and internal server error when | run the following
> mod_python script.  I am actually trying to run Django.
> 
> Script:
> 
> from mod_python import apache
> 
> def handler(req):
>     req.content_type = 'text/plain'
>     req.write("Under Construction")
>     return apache.OK



You just cant't import mod_python.apache from the command line.
To run your scripts, you usually do things like (not tested):

try:
     from mod_python import apache
     APACHE = True
except ImportError:
     # for when I'm outside Apache
     APACHE = False


class DummyRequest:
     """Simulates a request object"""

     def write(self, mstr):
         print mstr

     # you may need some other things...


def handler(req):
     req.content_type = 'text/plain'
     req.write("Under Construction")
     if APACHE:
         return apache.OK


######################
if __name__ == "__main__":
     req = DummyRequest()
     handler(req)


HTH,
	Olivier


From python at hope.cz  Sat Feb 25 06:17:19 2006
From: python at hope.cz (Lad)
Date: 25 Feb 2006 03:17:19 -0800
Subject: How to send an email with non-ascii characters in Python
References: <1140775736.341876.314070@t39g2000cwt.googlegroups.com>
	<slrndvtn7p.e6o.sybrenUSE@schuimige.unrealtower.org>
	<1140777219.636561.47960@e56g2000cwe.googlegroups.com>
	<slrndvuma9.f5e.sybrenUSE@schuimige.unrealtower.org>
Message-ID: <1140866239.019528.183190@t39g2000cwt.googlegroups.com>

Finally I have the working version,It looks like this
#############
from email.Message import Message
from email.MIMEText import MIMEText
from email.Header import Header
import smtplib
msg = Message()
Body='R?d?c?ch M?rinka a ?kol?k K?ja
Mar?k'.decode('utf8').encode('windows-1250')# I use the text written
in my editor with utf-8 coding, so first I decode and then encode to
windows-1250
msg = MIMEText(Body,'plain', 'windows-1250')#add body to email and with
 proper coding
h = Header('Cesk? knihy - made by Czech
Republic'.decode('utf8').encode('windows-1250'), 'windows-1250')#Also
subject should be a proper coding with
msg['Subject'] = h# add the header to the message
s = smtplib.SMTP() # and send
s.connect()
s.sendmail('e..ort at h.pe.cz', 'ex..ort at h.pe.cz', msg.as_string())
s.close()
#############
Hope it may be useful to others



From novin01 at gmail.com  Fri Feb 17 05:52:20 2006
From: novin01 at gmail.com (novin01 at gmail.com)
Date: 17 Feb 2006 02:52:20 -0800
Subject: Add a month
Message-ID: <1140173540.686250.205760@g44g2000cwa.googlegroups.com>

Hi, this is probably a really simple question but...
How do you add a month to a datetime date in python? It would be nice
if  you could do something like:

d = datetime.date(2006,2,17)
dm = datetime.timedelta(months=1)
d_new = d + dm

but timedelta doesn't have a 'months' setting. Am I missing some easy
method or do I have to code a work around myself??

Thanks in advance for the help!



From kay.schluehr at gmx.net  Wed Feb 22 08:28:31 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 22 Feb 2006 05:28:31 -0800
Subject: Python vs. Lisp -- please explain
In-Reply-To: <7xu0arbkwd.fsf@ruckus.brouhaha.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com> <43fbc788@usenet01.boi.hp.com>
	<87u0ar3gba.fsf@wilson.homeunix.com>
	<pan.2006.02.22.11.35.14.90948@REMOVETHIScyber.com.au>
	<1140612537.685150.68330@o13g2000cwo.googlegroups.com>
	<7xu0arbkwd.fsf@ruckus.brouhaha.com>
Message-ID: <1140614911.243300.67200@g47g2000cwa.googlegroups.com>


Paul Rubin wrote:
> "Kay Schluehr" <kay.schluehr at gmx.net> writes:
> > I talked to Richard Emslie recently and he told me that the PyPy team
> > works on a mechanism to create CPython-extension modules written in
> > RPython i.e. a statically translateable subset of Python. So even
> > without dynamic code specialization there will be an optimization path
> > based on the PyPy toolchain that is amazing.
>
> Sounds great but is that a whole lot different from pyrex?

RPython is Python code not a different language. In a sense RPython
consists of a set of rules usual Python has to conform to make complete
type-inference feasible. Here is an overview of those rules.

http://codespeak.net/pypy/dist/pypy/doc/coding-guide.html#restricted-python

Kay



From g.brandl-nospam at gmx.net  Fri Feb 17 16:26:55 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Fri, 17 Feb 2006 22:26:55 +0100
Subject: Does python have an internal data structure with functions
	imported from a module?
In-Reply-To: <mailman.2070.1140211447.27775.python-list@python.org>
References: <mailman.2070.1140211447.27775.python-list@python.org>
Message-ID: <45mtcvF7erbvU1@individual.net>

Carl J. Van Arsdall wrote:
> Alright, I attempted to post this question yesterday but I don't see it 
> as showing up, so I apologize in advance if this is a double post.
> 
> Python Gurus:
> 
> Let me elaborate a bit more on this question.  Basically, I want to know 
> if there is some data structure in python that maps a string function 
> name to an address of a function or something to that nature.
> 
> If this is confusing, let me describe what I want to do and see if 
> anyone has any ideas.
> 
> basically we have:
> 
>  >>>def functA():
> ...  pass
> 
>  >>> functA
> <function functA at 80db128>
> 
> And what I'd like to do is:
> 
>  >>>__internalFuncDict__['functA']
> <function functA at 80db128>

Read about globals(), dir() and module.__dict__.

Georg


From lycka at carmen.se  Tue Feb 14 05:01:31 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Tue, 14 Feb 2006 11:01:31 +0100
Subject: Newbie
In-Reply-To: <v3JHf.2731$lo3.2501@trnddc07>
References: <v3JHf.2731$lo3.2501@trnddc07>
Message-ID: <43F1AA7B.40700@carmen.se>

LittlePython wrote:
> Is this a good place to post python questions from newbie's, or would you
> suggest another board?

The best place to ask newbie questions is the Tutor mailing list.
Go to http://mail.python.org/mailman/listinfo/tutor to subscribe.
Check out the archives and you'll see how great it is. Besides
the fact that there are several guys who are both very good at
Python, good at explaining, and tolerant with newbie questions
and mistakes, you'll see much less of those sidetracking long
threads you often see in comp.lang.python.


From steve at holdenweb.com  Mon Feb 20 02:54:33 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 20 Feb 2006 02:54:33 -0500
Subject: Is inifinite loop not a good practice?
In-Reply-To: <43F9DF68.5020301@gmail.com>
References: <43F9DF68.5020301@gmail.com>
Message-ID: <dtbsjh$pqa$1@sea.gmane.org>

Alvin A. Delagon wrote:
> Greetings,
> 
> I have to write a python script that would continously monitor and 
> process a queue database. Once the script sees an unprocessed record it 
> will create a thread to process it otherwise it will do nothing. I've 
> been planning to do an infinite loop within the script to do this but 
> I've been hearing comments that infinite loop is a bad programming 
> practice. I'm opted to run the script via crontab but I consider it as 
> my last resort. Do you have any suggestions on the design? Thanks in 
> advance!

Clearly no process written as an infinite look is expected to run 
forever - it will be brought down by system reboots, for example, 
without going into end-of-life issues.

The classic network server process is pretty much an infinite loop, 
though perhaps with a break condition actioned when the operator sets 
some flag with a command, and there's no real reason why you shouldn't 
cast your application as such a loop. You will need to do so with care, 
however.

The danger is that you will spend time that should really be allocated 
to other processes on the system checking for database updates. So you 
need to design your polling mechanism fairly carefully - perhaps it 
could sleep five seconds once it found there were no more records that 
needed processing before looking again, or some similar mechanism to 
ensure that the system doesn't spend too much time looking for changes.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From webraviteja at gmail.com  Fri Feb  3 07:05:18 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 3 Feb 2006 04:05:18 -0800
Subject: Server side newbie
In-Reply-To: <1138552847.103899.302880@g14g2000cwa.googlegroups.com>
References: <1138552847.103899.302880@g14g2000cwa.googlegroups.com>
Message-ID: <1138968318.121755.97100@g47g2000cwa.googlegroups.com>


swisscheese wrote:
> I have a simple python desktop app with several edit controls and a
> couple of buttons. It just does some math. What's the simplest way to
> make it a server-side app so visitors to my site can run the app via
> their browser?

If the math is simple, you can just use JavaScript. No need to bother
running it on the server.



From grig.gheorghiu at gmail.com  Wed Feb  1 10:02:57 2006
From: grig.gheorghiu at gmail.com (Grig Gheorghiu)
Date: 1 Feb 2006 07:02:57 -0800
Subject: Test driven programming, was Re: VB to Python migration
References: <DjyCf.110918$AP5.12355@edtnps84>
	<1138421531.231633.41140@z14g2000cwz.googlegroups.com>
	<drj04s$7c6$1@wake.carmen.se>
	<1138566539.478552.113180@g49g2000cwa.googlegroups.com>
	<drlckk$ete$1@wake.carmen.se> <KPtDf.150306$AP5.92261@edtnps84>
	<drnd3j$s4d$1@wake.carmen.se> <rlSDf.148748$6K2.76617@edtnps90>
	<drq3r2$qmu$1@wake.carmen.se>
Message-ID: <1138805691.431379.250290@z14g2000cwz.googlegroups.com>

Magnus,

I've been writing TextTest tests lately for an application that will be
presented at a PyCon tutorial on "Agile development and testing". I
have to say that if your application does a lot of logging, then the
TextTest tests become very fragile in the presence of changes. So I had
to come up with this process in order for the tests to be of any use at
all:

1) add new code in, with no logging calls
2) run texttest and see if anything got broken
3) if nothing got broken, add logging calls for new code and
re-generate texttest golden images

I've been doing 3) pretty much for a while and I find myself
regenerating the golden images over and over again. So I figured that I
won't go very far with this tool without the discipline of going
through 1) and 2) first.

>From what I see though, there's no way I can replace my unit tests with
TextTest. It's just too coarse-grained to catch subtle errors. I'm
curious to know how exactly you use it at Carmen and how you can get
rid of your unit tests by using it.

Grig



From steve at holdenweb.com  Tue Feb 21 15:05:40 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 21 Feb 2006 15:05:40 -0500
Subject: Python vs. Lisp -- please explain
In-Reply-To: <4866bea60602210948x10bff91elbff376bc8ec116f8@mail.gmail.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>	<87bqx3glb1.fsf@wilson.homeunix.com>	<43f984dc$0$27151$626a54ce@news.free.fr>	<873bienwlx.fsf@wilson.homeunix.com>	<mailman.2160.1140440898.27775.python-list@python.org>	<1140454473.335788@jetspin.drizzle.com>	<pan.2006.02.20.21.59.12.636908@REMOVETHIScyber.com.au>	<1140490302.639049@jetspin.drizzle.com>	<mailman.2231.1140532613.27775.python-list@python.org>	<1140539404.440390.172350@g44g2000cwa.googlegroups.com>
	<4866bea60602210948x10bff91elbff376bc8ec116f8@mail.gmail.com>
Message-ID: <dtfrql$eju$3@sea.gmane.org>

Chris Mellon wrote:
[...]
> Torstens definition isn't useful for quantifying a difference between
> interpeted and compiled - it's a rough sort of feel-test. It's like
> how much of a naked body you can expose before before it changes from
> art to pornography - it's not something that is easily quantified.
> 
[...]

Possibly, but if your aim is exposing as much flesh as possible without 
being labeled pornography I think I'd conclude you were in the 
pornography business from the start, albeit masquerading as an "art dealer".

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From plahey at alumni.caltech.edu  Thu Feb 23 00:56:57 2006
From: plahey at alumni.caltech.edu (plahey at alumni.caltech.edu)
Date: 22 Feb 2006 21:56:57 -0800
Subject: What's up with this code?
In-Reply-To: <43fd08cf$1@nntp0.pdx.net>
References: <1140649331.924736.128420@g43g2000cwa.googlegroups.com>
	<43fd08cf$1@nntp0.pdx.net>
Message-ID: <1140674217.868665.5000@z14g2000cwz.googlegroups.com>

Scott,

this was a really clever catch, but I don't agree with the solution.
The problem is your assumption of how zip/izip _must_ work.  I don't
think there is any contract that states that they will always advance
the first argument first and the second argument second... that is an
implementation detail (the end result, ignoring iterator state, is the
same regardless of the order in which you advance things).  Given this,
I think using izip is simply a bad idea.

How about something like this:

    def __add__(self, other):
        rcoefs1 = reversed(self.coefs)
        rcoefs2 = reversed(other.coefs)
        minlen = min(len(rcoefs1), len(rcoefs2))
        coefs = [rcoefs1.next()+rcoefs2.next() for i in xrange(minlen)]
        coefs.extend(rcoefs1)
        coefs.extend(rcoefs2)
        if coefs[-1] != 0:
            return Polynomial(reversed(coefs), False, False)
        else:
            return Polynomial(reversed(coefs), False)



From egbert.bouwman at hccnet.nl  Mon Feb 20 06:55:42 2006
From: egbert.bouwman at hccnet.nl (egbert)
Date: Mon, 20 Feb 2006 12:55:42 +0100
Subject: Pythonpath and gnome panel
In-Reply-To: <1140434782.384240.254110@g44g2000cwa.googlegroups.com>
References: <1140335502.110014.35870@g47g2000cwa.googlegroups.com>
	<pan.2006.02.19.08.02.33.411906@REMOVETHIScyber.com.au>
	<1140434782.384240.254110@g44g2000cwa.googlegroups.com>
Message-ID: <20060220115542.GA6432@hccnet.nl>

My pygtk gui can not be started from a gnome panel, 
because, apparently, the panel doesn't know about my
modified PYTHONPATH. So how can I instruct the panel ?
-- 
Egbert Bouwman - Keizersgracht 197 II - 1016 DS  Amsterdam - 020 6257991
========================================================================


From claird at lairds.us  Sun Feb 19 12:08:38 2006
From: claird at lairds.us (Cameron Laird)
Date: Sun, 19 Feb 2006 17:08:38 GMT
Subject: define loop statement?
References: <lW4Jf.31559$3V4.8390@trnddc06>
	<mailman.2114.1140318344.27775.python-list@python.org>
	<%50Kf.1181$p13.791@trnddc08>
Message-ID: <fvkmc3-00f.ln1@lairds.us>

In article <%50Kf.1181$p13.791 at trnddc08>,
David Isaac <aisaac0 at verizon.net> wrote:
			.
			.
			.
>Admiration wins out over revulsion.  ;-)
>Thanks,
>Alan Isaac
>
>PS Here's the motivation.  Python closely resembles pseudocode.  With
>a very little LaTeX hacking, it is often possible to write algorithms is
>Python that typeset as reasonable pseudocode.  A simple repetitive
>loop is a bit of a sticking point.
>
>

Wow.  Innovative.


From bearophileHUGS at lycos.com  Sun Feb 26 14:10:38 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 26 Feb 2006 11:10:38 -0800
Subject: sort one list using the values from another list
In-Reply-To: <Bb-dncKoOeYvQ5zZRVn-uw@comcast.com>
References: <mailman.2447.1140969980.27775.python-list@python.org>
	<Bb-dncKoOeYvQ5zZRVn-uw@comcast.com>
Message-ID: <1140981038.788111.93500@j33g2000cwa.googlegroups.com>

Your solution Steven Bethard looks very intelligent, here is a small
speed test, because sorting a list according another one is a quite
common operation.
(Not all solutions are really the same, as Alex has shown).


from itertools import izip, imap
from operator import itemgetter
from random import randint, choice, randint, shuffle
from string import lowercase

def timeit(function, *arg1, **arg2):
    """timeit(function, *arg1, **arg2): given a function and its
parameters, calls it
    and computes its running time, in seconds. It result is
discarded."""
    t1 = clock()
    function(*arg1, **arg2)
    t2 = clock()
    return round(t2-t1, 2)

def psort1(s1, s2):
    s1[:] = [a for b,a in sorted(zip(s2, s1))]

def psort2(s1, s2):
    aux = zip(s2, enumerate(s1))
    aux.sort()
    s1[:] = [a for b, (i, a) in aux]

def psort3(s1, s2):
    _indices = range(len(s1))
    _indices.sort(key=s2.__getitem__)
    s1[:] = [s1[i] for i in _indices]

def psort4(s1, s2):
    _indices = range(len(s1))
    _indices.sort(key=s2.__getitem__)
    s1[:] = map(s1.__getitem__, _indices)

def psort5(s1, s2):
    s1[:] = zip(*sorted(zip(s2, s1)))[1]

def psort6(s1, s2):
    s1[:] = map(itemgetter(0), sorted(zip(s1, s2), key=itemgetter(1)))

def psort7(s1, s2):
    s1[:] = [a for b,a in sorted(izip(s2, s1))]

def psort8(s1, s2):
    s1[:] = zip(*sorted(izip(s2, s1)))[1]

def psort9(s1, s2):
    s1[:] = map(itemgetter(0), sorted(izip(s1, s2), key=itemgetter(1)))


n = 100000
s1 = ["".join(choice(lowercase) for i in xrange(randint(2,8))) for k in
xrange(n)]
s2 = range(n)
shuffle(s2)

for psort in sorts:
    s1c = list(s1)
    print timeit(psort, s1c, s2), "s"


Timings on my PC, Python 2.4, PIII 500 MHz:
2.87
3.82
1.6
1.56
4.35
2.49
2.75
4.29
2.35

psort4 is my variant of your solution, and it seems the faster one.
Note: one liners are bad, and expecially bad in Python that is designed
to be a readable language, so let's avoid them as much as possible. I
have used one of them to generate s1, but I'll not use them in
production code or in my libraries, etc.

Bye,
bearophile



From cdc at maxnet.co.nz  Mon Feb 13 21:42:47 2006
From: cdc at maxnet.co.nz (Carl Cerecke)
Date: Tue, 14 Feb 2006 15:42:47 +1300
Subject: how do you pronounce 'tuple'?
In-Reply-To: <ieGdnftVlNuA3WzenZ2dnUVZ_t2dnZ2d@speakeasy.net>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
	<mailman.1857.1139863723.27775.python-list@python.org>
	<ieGdnftVlNuA3WzenZ2dnUVZ_t2dnZ2d@speakeasy.net>
Message-ID: <43f143a8@usenet01.boi.hp.com>

Erik Max Francis wrote:
> Terry Hancock wrote:
> 
>> I doubt that helps much: I pronounce all of those words
>> (when I use them, which is not too often) as "-toopel". The
>> only tuple I pronounce with the "-uh-" is "couple", and I
>> usually call that a "two-tuple" when dealing with Python.
> 
> 
> I prefer the name _pair_ :-).
> 
>> I suspect that even those who would pronounce 'quintuple'
>> "kwintuhpel" would say 'quintuplicate' as "kwinTOOPlikuht".
>> (that's the noun, not the verb, which is "kwintoopliKATE").
> 
> 
> Yeah.  The short form is that both are right and which one is more 
> common is probably regional more than anything.  I've heard people say 
> _toople_ vs. _tuhple_, but I've never heard anyone say _quintoople_ vs. 
> _quintuhple_ (granted, not that the situation arises all that often).
> 
> But come to think of it, it kind of does.  I've heard _quintuhplet_ and 
> _sextuhplet_ and the like plenty of times, and I've never heard it 
> pronounced the other way (in General American).  m-w.com shows something 
> interesting here -- the first listed pronunciation for _quintuple_ is oo 
> with uh being an alternate, but the first listed pronunciation for 
> _quintuplet_ is uh with oo being an alternate.  Which probably goes to 
> emphasize that that it's just whatever you're used to and there's no 
> rhyme or reason to any of it.
> 
>> So what's a 1-element tuple, anyway? A "mople"?  "monople"?
>> It does seem like this lopsided pythonic creature (1,) ought
>> to have a name to reflect its ugly, newbie-unfriendly
>> nature.

> Of course that's still a completely valid construct in Python so the 
> question stands.  If a 4-tuple is a quadruple, a 3-tuple is a triple, a 
> 2-tuple is an pair, then I guess a 1-tuple would be a single.  Granted 
> that's not nearly as gruesome enough a name to go with the special 
> lopsided Pythonic creature mentioned above.  I suggest we name it a 
> hurgledink.
> 

So, ahhh, what about zero-tuples? zuple? uple? Surely it would be better 
for 2,1, and 0-tuples to be called 2,1, and 0-tuples.

And, BTW, in New Zealand, I've only ever heard the pronunciation 
'tupple'. toople sounds kind-of stoopid.

Cheers,
Carl.


From danb_83 at yahoo.com  Sat Feb 18 03:02:25 2006
From: danb_83 at yahoo.com (Dan Bishop)
Date: 18 Feb 2006 00:02:25 -0800
Subject: Python 3000 deat !? Is true division ever coming ?
References: <1139810036.943598.229030@g47g2000cwa.googlegroups.com>
	<1139928242.726349.221080@g44g2000cwa.googlegroups.com>
	<mailman.1906.1139933770.27775.python-list@python.org>
	<dst1tm$jbb$1@news.doit.wisc.edu>
	<mailman.1910.1139939448.27775.python-list@python.org>
	<dt43fa$8p0$1@wake.carmen.se>
Message-ID: <1140249745.275343.283900@g14g2000cwa.googlegroups.com>

Magnus Lycka wrote:
> Gregory Pi?ero wrote:
> > I knew about that approach.  I just wanted less typing :-(
>
> It's enough to introduce one float in the mix.
> 1.*a/b or float(a)/b if you don't want one more
> multiplication.

That doesn't work if either a or b is a Decimal.  What *could* work is


def is_integer(num):
   return isinstance(num, (int, long))

def divide(a, b):
   if is_integer(a) and is_integer(b):
      return 1.0 * a / b
   else:
      return a / b

But why bother when you could just put "from __future__ import
division" at the top of the file?



From steve at REMOVETHIScyber.com.au  Sun Feb 12 09:03:39 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Mon, 13 Feb 2006 01:03:39 +1100
Subject: Is python very slow compared to C
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>

On Sun, 12 Feb 2006 03:03:20 -0800, bearophileHUGS wrote:

> Steven D'Aprano>Very slow to do what, compared to what? The decay time
> of the tau meson?<
> 
> Probably every answer I can give you is wrong for you, so answering is
> almost useless... 

We do actually agree. You did explain why the speed of the language itself
is rarely the critical factor. My criticism is that whatever good your
post would have done was nullified by your opening comment stating that
Python is very slow -- a comment which I think is not only harmful, but
wrong, benchmarks like the one you linked to not withstanding.

I think it is wrong to call Python "very slow" just because it is slower
than some other language or languages, for the same reason it would be
wrong to describe the population of the UK as "very low" because 60
million people is a smaller number than China or India's one billion plus.
Doing so merely reinforces the premature optimizer's message that any
language that isn't C (and sometimes Lisp) is "not fast enough".

The benchmark you pointed to are of limited use for application
developers. (Their value to language designers is another story.) Given
that Ocaml is (say) 200 times faster than Python on average, it tells the
application developer virtually nothing about the performance of his
application. And that's what user's care about -- they couldn't care less
about binary trees or partial sums, they care about how long it takes to
render a JPEG, open an email, save their files, query the database,
display a window, and so forth. Few application level tasks are limited by
the speed of the language, not these days.

You don't believe me? Consider the following:

When you drag your mouse over text in a graphical text editor, the text
highlights. How much money would you be prepared to pay to make that
highlighting occur 200 times faster? $100? $1? One cent? Chances are you
wouldn't pay a thing, because it is already fast enough, and making it
faster is of zero value to you -- even if highlighting ten gigabytes of
text might be uncomfortably slow.

What about opening an email? How much would you pay to reduce the time it
takes to open and display an email from a hundredth of a second to
virtually instantaneously? I suggest that most people would consider 0.01s
to already be be "virtually instantaneously".

The important question isn't "is Python fast or slow?", it is "is Python
fast enough?". That's a question that doesn't have a simple answer,
because it depends. Fast enough to do what?

But, in general, more often than not, Python is fast enough. The extra
value of using something like Lua or Ocaml or even C is just not enough to
make up for the disadvantages of using those languages. 

Of course Python isn't always fast enough. Please don't waste your time
coming up with practical examples where pure Python is objectively too
slow for a certain task, because you won't be telling me anything I don't
already know. 

But the developer doesn't have to write pure Python, he can call a module
written in C, or change the algorithm, or find another way to accomplish
the same end result. Or even decide that for this specific task, Python is
not the language to use. These are all good solutions, but they don't mean
that Python is "very slow" in general. Even C is not always fast enough,
but we wouldn't say C is "very slow" just because it can't calculate the
first million Mersenne Primes in twenty milliseconds.


-- 
Steven.



From johnmc at velseis.com.au  Wed Feb 22 22:01:12 2006
From: johnmc at velseis.com.au (John McMonagle)
Date: Thu, 23 Feb 2006 13:01:12 +1000
Subject: Tix, spinboxes, and 1>=5
In-Reply-To: <1140662257.514090.170510@g47g2000cwa.googlegroups.com>
References: <1140662257.514090.170510@g47g2000cwa.googlegroups.com>
Message-ID: <1140663672.31572.9.camel@cornell>

On Wed, 2006-02-22 at 18:37 -0800, cjbackhouse at gmail.com wrote:
> This odd bug has been annoying me for several days now. I finally got
> round to making this, frankly hilarious, testcase:
> 
> 
> from Tix import *
> 
> def sayfive(num):
>     if num<5: print num,"< 5"
>     else: print num,">= 5"
> 
> sayfive(4)
> sayfive(6)
> rootwnd=Tk()
> Control(rootwnd,command=sayfive).pack()
> rootwnd.mainloop()
> 
> 
> So, our program starts, the first two lines executed write "4<6" "6>=5"
> as expected. Now the user changes the value in the spinner, and we get
> output like "1>=5". What magic is Tix pulling, and more importantly how
> the hell do I stop it?

This should fix your problem:

from Tix import *

def sayfive(num):
    num = int(num)
    if num<5: print num,"< 5"
    else: print num,">= 5"

sayfive(4)
sayfive(6)
rootwnd=Tk()
Control(rootwnd,command=sayfive).pack()
rootwnd.mainloop()


The entry in the spinbox is a string.




-- 
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.



From dstark7 at gmail.com  Sat Feb 18 15:40:55 2006
From: dstark7 at gmail.com (dmsbox2000-list1@yahoo.com)
Date: 18 Feb 2006 12:40:55 -0800
Subject: Tkinter / Aqua (OS X) question (canvas borders)
Message-ID: <1140295255.361958.82510@o13g2000cwo.googlegroups.com>

This is a beginner question.  I am using a Mac running OS X.  I have
TclTkAqua installed.  If I type:

import Tkinter

r = Tkinter.Tk()
c = Tkinter.Canvas(r)
c.pack()
c.create_line(0,0,100,0)

the line is not visible.  If I type:

c.create_line(3,4,100,4)

the line is visiable.  There appears to be an asymmetric "border"
around the inside of the canvas.  If I type

print c.cget('padx'), c.cget('pady')

I get zero.  How do I find out the size of the border?  Is this
specific to the Aqua version of Tk?

I have X Windows installed.  Would I be better off if I down loaded the
Unix version of Tk and Tkinter/python and compiled it for X?



From dananrg at yahoo.com  Sat Feb 25 08:54:55 2006
From: dananrg at yahoo.com (dananrg at yahoo.com)
Date: 25 Feb 2006 05:54:55 -0800
Subject: A bit off topic, but good web hosting for PostgreSQL/Python?
Message-ID: <1140875695.053987.158710@t39g2000cwt.googlegroups.com>

Seems like most web hosting providers support MySQL, but not
PostgreSQL. I need a web hosting account that supports PostgreSQL for a
particular personal project I'm working on (as well as Python, natch),
since PostGIS runs only on PostgreSQL. PostGIS is a nice open source
spatial database extension to PostgreSQL that allows you to store
geometry in the database.

Couldn't find a good PostgreSQL newsgroup so I thought I'd ask here.
Did find one weird one named Mailing something or other, but that may
be a gateway to a e-mail distribution list.



From __peter__ at web.de  Thu Feb  9 08:02:51 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 09 Feb 2006 14:02:51 +0100
Subject: removing characters before writing to file
References: <1139452501.421306.44080@f14g2000cwb.googlegroups.com>
Message-ID: <dsfeev$aq7$02$1@news.t-online.com>

eight02645999 at yahoo.com wrote:

> i have some output that returns a lines of tuples eg
> 
> ('sometext1', 1421248118, 1, 'P ')
> ('sometext2', 1421248338, 2, 'S ')
> and so on
> ....
> 
> I tried this
> re.sub(r" '() ",'',str(output)) but it only get rid of the ' and not
> the braces. I need to write the output to a file such that
> 
> sometext1, 1421248118, 1, P
> sometext2, 1421248338, 2, S
> 
> I also tried escaping , re.sub(r" '\(\) ",'',str(output)) but also did
> not work
> How can i get rid of the braces before writing to file? thanks

I'd use a csv.writer:

>>> import csv, sys
>>> data = [
... ('sometext1', 1421248118, 1, 'P '),
... ('sometext2', 1421248338, 2, 'S ')
... ]
>>> w = csv.writer(sys.stdout)
>>> w.writerows(data)
sometext1,1421248118,1,P
sometext2,1421248338,2,S

Peter



From siv.hansen at gmail.com  Mon Feb 27 18:38:05 2006
From: siv.hansen at gmail.com (Cruella DeVille)
Date: 27 Feb 2006 15:38:05 -0800
Subject: Catch exceptions
Message-ID: <1141083485.798371.188440@u72g2000cwu.googlegroups.com>

In my application of bookmarks I get a filename as a parameter in one
of my methods. I want to catch the "FileNotFoundException" if the user
types an invalid filename. My code (that doesn't do what I want it to
do - namely print a nicely formatted error message, and no stack trace)

def openFile(self):
        try:
            return open(self.fileName, self.mode)
        except IOError:
            print("%s" %("The file was not found"))

But this one never occurs even if I write the name of a non-existing
file.

I also assign a variable, filePointer to a filename (the result of
openFile(self)), with a AttributeError
 if self.filePointer is None:
           raise AttributeError, "Assignment failed"

But I still get this stack trace (or trackback?)

How do I implement a try- except? Is it in my method where i open the
file or when I try to open the file in my "main-method"?



From sam at nuevageorgia.com  Mon Feb 27 23:44:58 2006
From: sam at nuevageorgia.com (SamFeltus)
Date: 27 Feb 2006 20:44:58 -0800
Subject: Python and Flash
In-Reply-To: <1139407620.948877.5820@g14g2000cwa.googlegroups.com>
References: <1139230361.675896.241920@z14g2000cwz.googlegroups.com>
	<1139235297.903689.244030@z14g2000cwz.googlegroups.com>
	<1139407620.948877.5820@g14g2000cwa.googlegroups.com>
Message-ID: <1141101898.725832.104260@e56g2000cwe.googlegroups.com>

Why not just have the Python on the server send a JSON string to the
Flash ap?  Easy easy.  Just use LoadVars on the Flash side.

All that SOAP and XML-RPC sounds might be an needless overcomplication.

Sam the Gardener

http://sonomasunshine.com



From "jay\" at (none)  Sat Feb 25 11:14:01 2006
From: "jay\" at (none) (none)
Date: Sat, 25 Feb 2006 09:14:01 -0700
Subject: Problem with Property
In-Reply-To: <95079633.aiQev8x7lQ@news.perlig.de>
References: <TsydnRFxOJsBw53ZnZ2dnUVZ_tqdnZ2d@comcast.com>
	<95079633.aiQev8x7lQ@news.perlig.de>
Message-ID: <ccKdnaxOndyC-53ZnZ2dnUVZ_vydnZ2d@comcast.com>

Andr? Malo wrote:
> * none wrote:
> 
> 
>>classMyObject:
> 
> [...]
> 
> 
>>As you can see, the _getProperty() method gets called properly when I do
>>  'o.value'  but 'o.value = 123' does not seem to use the property
>>stucture.   I can't figure out why 'o.value=123' does not call
>>_setProperty()
>>
>>Any ideas?
> 
> 
> property only works as intended with new style classes.

duh.. I changed that to
	class MyObject(object):
and it worked fine

Thanks

Take care,
Jay


From R.Brodie at rl.ac.uk  Wed Feb 22 08:46:20 2006
From: R.Brodie at rl.ac.uk (Richard Brodie)
Date: Wed, 22 Feb 2006 13:46:20 -0000
Subject: Python CGI not working in Firefox but does in IE
References: <1140615651.847586.258300@f14g2000cwb.googlegroups.com>
Message-ID: <dthpvc$i0i$1@blackmamba.itd.rl.ac.uk>


"Harlin Seritt" <harlinseritt at yahoo.com> wrote in message 
news:1140615651.847586.258300 at f14g2000cwb.googlegroups.com...

> [CODE]
> print 'Content-type: text/plain\n'

That's your problem. You've said text/plain when you meant text/html.





From johnjsal at NOSPAMgmail.com  Mon Feb 13 16:03:07 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 13 Feb 2006 21:03:07 GMT
Subject: cyclic data structures
In-Reply-To: <mailman.1858.1139863851.27775.python-list@python.org>
References: <Nc6If.1604$No6.38177@news.tufts.edu>
	<mailman.1858.1139863851.27775.python-list@python.org>
Message-ID: <fu6If.1607$No6.37915@news.tufts.edu>

Peter Decker wrote:

> 'L' is a pointer to a list. You are now adding that pointer to the
> very list it points to.

I understand that, but I guess I just don't see how this creates 
anything other than a list that refers to [1, 2], and then refers again 
to [1, 2], to create [1, 2, [1, 2]].

L.append(L) basically creates this, I think:

[1, 2, L]

Now, assuming that's correct, and since L points to the list [1, 2], why 
can't '[1, 2]' be substituted for the 'L' and then the list is closed?


From peter at engcorp.com  Mon Feb 13 20:08:15 2006
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 13 Feb 2006 20:08:15 -0500
Subject: Jedit
In-Reply-To: <ziggy-358301.20045813022006@netnews.asp.att.net>
References: <ziggy-358301.20045813022006@netnews.asp.att.net>
Message-ID: <dsrai5$glh$3@sea.gmane.org>

ziggy wrote:
> Just wondering if there is something out there like Jedit, but written 
> in python ( not just supporting, but actually written in it.. )
> 
> Nothing large like Stanzi's or Boa.. Just something quick and simple, 
> with code completion, and a debugger..

Is that last part a joke?  "Quick and simple", but with a debugger too?

Anyway, peruse http://wiki.python.org/moin/PythonEditors and see if any 
meet your requirements.

-Peter



From lycka at carmen.se  Fri Feb  3 06:00:52 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 03 Feb 2006 12:00:52 +0100
Subject: Another try at Python's selfishness
In-Reply-To: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
Message-ID: <drvd56$nb3$1@wake.carmen.se>

n.estner at gmx.de wrote:
> What do you think?

The impression I get from your suggestion is that you
haven't really understood Python. I'm sure that some
things could be better designed or better documented,
but your suggestions would actually make things worse.
Sorry.

Today, Python has a syntactic shortcut. If 'a' is an
instance of class 'A', a.f(x,y,z) is a shortcut for
A.f(a,x,y,z). If you don't use the shortcut, there is
no magic at all, just the unusual occurence of a type
check in Python! If you use the shortcut, Python code
looks just like most other OO languages. This isn't
very magical.

What you suggest doesn't remove magic, but it introduces
a bunch of inconsistencies!

> But:
>     Foo.__dict["bar"]__(1,2,3)
> Does work.

I agree that this isn't completely clean, and there are
some other ways in which the distinction between functions,
unbound methods and bound methods seem a bit quirky to me.
I don't think the problem is in the syntax though, and if
it had been a real problem, it would had been solved.

>     class Foo:
>         def self.bar(a,b):
>             return a+b
>     Foo().bar(1,2) => 3

First of all, you are using a really poor example of a "method",
since it doesn't use any attributes of the Foo instance. That
function doesn't seem to belong in that class at all. If it
should be in the class, it should be a static method, so self
should not be involved at all. In modern Python it would look
like this:

class Foo(object):
     @staticmethod
     def bar(a, b):
         return a+b

Anyway, my impression is that you haven't fully understood how
namespaces work in Python, at least not the distinction between
class namespaces and instance namespaces. Please study this a
bit more. Hopefully, you'll find enlightenment and things will
fall into place for you.

You are really giving "self" a magic meaning with your suggestion
which isn't needed at all. So far, the existence of x.y somewhere
in Python always implied that x was already introduced explicitly
in the program, and you suggest that we violate that both in the
"def self.x"-row, and inside the methods when we access attributes.

Provoking a language can be a way of learning it, and provoking
people can sometimes lead to new insights, but it's important to
have an open mind. When learning a new language, it's probably
better to try to adapt oneself to it, rather than the other way
around.


From bonono at gmail.com  Fri Feb 10 05:22:52 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 10 Feb 2006 02:22:52 -0800
Subject: Question about idioms for clearing a list
In-Reply-To: <dsho58$47k$1@wake.carmen.se>
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>
	<mailman.1546.1139320907.27775.python-list@python.org>
	<dscdtr$ciu$1@wake.carmen.se>
	<mailman.1594.1139403378.27775.python-list@python.org>
	<dsd311$qlp$1@wake.carmen.se>
	<ZatGf.28418$F_3.14242@newssvr29.news.prodigy.net>
	<dsfej3$1i6$1@wake.carmen.se>
	<cQRGf.54501$PL5.14689@newssvr11.news.prodigy.com>
	<dsho58$47k$1@wake.carmen.se>
Message-ID: <1139566972.110582.247310@g43g2000cwa.googlegroups.com>


Magnus Lycka wrote:
>  >>> class BryansList(list):
> ...     add=list.append
> ...     def clear(self):
> ...         del self[:]
> ...
>  >>> b = BryansList([1,2,3,4,5])
>  >>> b
> [1, 2, 3, 4, 5]
>  >>> b.add(6)
>  >>> b.clear()
>  >>> b
> []
>
> Happy now? You can keep it, I don't need it. :)
> Most of us consider minimal interfaces a virtue.

What kind of performance penalty are we talking about here ? list being
such a fundamental thing, no one would like to use a slower version
just for the clear/add method. And if it is a "use when you really need
to", it would make the code harder to understand as it would be
"sometimes it is BryansList, sometimes it is builtin list".

That said, I don't find clear() to be useful as unless one needs to
pass around a single copy of list object around and saved them for
future use(which can be a source of subtle bug), just lst=[] is usually
good enough for localized usage.



From paulgeeleher at gmail.com  Sun Feb  5 16:57:19 2006
From: paulgeeleher at gmail.com (sophie_newbie)
Date: 5 Feb 2006 13:57:19 -0800
Subject: Strange behavior with os call in cgi script
In-Reply-To: <43e665f1$1@news.uni-ulm.de>
References: <1139171873.431432.195080@f14g2000cwb.googlegroups.com>
	<43e665f1$1@news.uni-ulm.de>
Message-ID: <1139176638.972414.19590@g47g2000cwa.googlegroups.com>

OK, interesting, but just how dow I print he environment in the
program??



From venkatbo at yahoo.com  Tue Feb 28 20:21:47 2006
From: venkatbo at yahoo.com (venkatbo at yahoo.com)
Date: 28 Feb 2006 17:21:47 -0800
Subject: Cross compile generation of .pyc from .py files...
Message-ID: <1141176107.234667.93210@e56g2000cwe.googlegroups.com>

Hi all,

We've managed to cross-compile (from i686 targeting ppc) python (2.4.2)
binaries and
extension modules.

However we cannot figure out how to cross-compile the .py (of
distribution) files and
generate the .pyc files for the target ppc from an i686 system.  Is it
possible to cross
compile .pyc files from .py files?

Some of the errors we get when we run 'python -v' on the target system
include:
....
# /usr/lib/python2.4/site.pyc has bad magic
import site # from /usr/lib/python2.4/site.py

# /usr/lib/python2.4/types.pyc has bad magic
import types # from /usr/lib/python2.4/types.py
.....

Thanks,
/venkat



From dejan.wirusrodiger at ck.t-com.hr  Thu Feb 23 05:53:56 2006
From: dejan.wirusrodiger at ck.t-com.hr (Dejan Rodiger)
Date: Thu, 23 Feb 2006 11:53:56 +0100
Subject: =?ISO-8859-2?Q?Re=3A_=27rar=27_is_not_recognized_as_?=
	=?ISO-8859-2?Q?an_internal_or_external_command=A3=BF=A3=BF=A3=BF?=
	=?ISO-8859-2?Q?=A3=BF?=
In-Reply-To: <dtjv4r$ma1$1@news.cn99.com>
References: <dtjv4r$ma1$1@news.cn99.com>
Message-ID: <dtk47i$76q$1@ss405.t-com.hr>

???????? said the following on 23.02.2006 10:03:
> rar_cmd = r'"D:\Program Files\WinRAR\rar.exe" a -idcdp %s %s' % (target,' '.join(source))

You can't cd to d:\Program Files\WinRAR and then call rar

You have to call rar with full path.

from subprocess import *
retcode = call([r'"D:\Program Files\WinRAR\rar.exe"', 'a', '-idcdp', target,
' '.join(source)])
if retcode == 0:
	print "everything OK"
-- 
Dejan Rodiger - PGP ID 0xAC8722DC
Delete wirus from e-mail address


From fredrik at pythonware.com  Mon Feb 27 12:21:14 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 27 Feb 2006 18:21:14 +0100
Subject: Unicode and MoinMoin
References: <1141017252.469296.139410@v46g2000cwv.googlegroups.com>
	<6qwMf.17099$yK1.13214@news-server.bigpond.net.au>
Message-ID: <dtvcec$bqb$1@sea.gmane.org>

Neil Hodgson wrote:

> > The only issue I'm having relates to Unicode. MoinMoin and python are
> > pretty unforgiving about files that contain Unicode characters that
> > aren't included in the coding properly. I've spent hours reading about
> > Unicode, and playing with different encoding/decoding commands, but at
> > this point, I just want a hacky solution that will ignore the
> > improperly coded characters or replace them with placeholders.
>
>     Call the codec with the errors argument set to "ignore" or "replace".
>
>  >>> unicode('AUTHOR: blahblah\n\nTITLE: Reading Course Readings... G.
> A. \x96 For references see blahblah.\n\n\n-----\n\n', 'utf8')
> Traceback (most recent call last):
>    File "<interactive input>", line 1, in ?
>    File "c:\python24\lib\encodings\utf_8.py", line 16, in decode
>      return codecs.utf_8_decode(input, errors, True)
> UnicodeDecodeError: 'utf8' codec can't decode byte 0x96 in position 58:
> unexpected code byte
>  >>> unicode('AUTHOR: blahblah\n\nTITLE: Reading Course Readings... G.
> A. \x96 For references see blahblah.\n\n\n-----\n\n', 'utf8', 'replace')
> u'AUTHOR: blahblah\n\nTITLE: Reading Course Readings... G. A. \ufffd For
> references see blahblah.\n\n\n-----\n\n'
>
>     BTW, its probably in Windows-1252 where it would be a dash.
> Depending on your context it may pay to handle the exception instead of
> using "replace" and attempt interpreting as Windows-1252.

here's one way to explicitly deal with 1252 gremlins:

    http://effbot.org/zone/unicode-gremlins.htm

</F>





From fredrik at pythonware.com  Fri Feb 17 03:57:36 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Feb 2006 09:57:36 +0100
Subject: file.read problem
References: <1140158220.388409.87650@g47g2000cwa.googlegroups.com><BieJf.15428$MJ.2728@fed1read07>
	<1140159632.758960.318580@g44g2000cwa.googlegroups.com>
Message-ID: <dt4362$qa4$1@sea.gmane.org>

"wscrsurfdude" wrote:

> >Try opening the file in 'rbU' mode. This will use universal newline mode
> >and convert all carriage returns to line feeds.
>
> I tried this, but as you say, now there are 0x0A bytes extra in my
> files, is there also a possibility to let all these things out, and
> just get the file.
>
> I am working on a script to get parts of raw data out of a file, and
> the data I read has to be the data written in the file without CR or
> LF.

what kind of file are you reading?  if it's a text file, it's supposed to have
LF in it (or CR LF if you read it in binary mode); the LF:s are there to tell
you where each line ends.

if it's a binary file, open with mode "rb".

</F>





From f.heleno at netcabo.pt  Thu Feb  2 08:30:58 2006
From: f.heleno at netcabo.pt (Silva)
Date: 2 Feb 2006 05:30:58 -0800
Subject: Resources
Message-ID: <1138887058.068827.69260@o13g2000cwo.googlegroups.com>

As requested:
www.guardyannet.com.br
www.tra.web.pt
http://www.cita.es/veracidad/expolingua/Brasil
http://www.collegeboard.com/csearch/majors_careers/profiles/careers/105464.html
http://www.guardyannet.com.br/
http://www.guiagratis.com.br/
http://www.clubedoprofessor.com.br/traduz/
http://poloclup.linguateca.pt/artur/
http://baixaki.ig.com.br/categorias/cat18_1.htm
http://www.jucergs.rs.gov.br/sitejucergs/Site/juc-trd_1.htm
http://www.abrates.com.br/
http://www.servicosgratis.com.br/categoria.php?id=30



From martin at v.loewis.de  Sun Feb 12 16:59:08 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 12 Feb 2006 22:59:08 +0100
Subject: Single-file executables
In-Reply-To: <mailman.1794.1139778796.27775.python-list@python.org>
References: <daadb$43ee6b05$4275d90a$28181@FUSE.NET>	<43EE7C2A.3040102@v.loewis.de>
	<mailman.1794.1139778796.27775.python-list@python.org>
Message-ID: <43EFAFAC.9080200@v.loewis.de>

Thomas Heller wrote:
> I wonder if anyone is actually using freeze on Windows, with scripts 
> that use, say, pywin32 and wxPython.

Interesting question. I've never done so myself (only on Linux and
Solaris), and given the relatively small interest in having a static
Python library on Windows, I guess the answer is no (or: everybody
doing that has managed to deal with the build process themselves).

I would probably go for a mingw static build if I had to attempt this.

Regards,
Martin


From peter at engcorp.com  Tue Feb 14 06:04:45 2006
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 14 Feb 2006 06:04:45 -0500
Subject: Python / Apache / MySQL
In-Reply-To: <0001HW.C01772E1000952B1F0407550@news.individual.de>
References: <1139907519.427789.188760@g14g2000cwa.googlegroups.com>	<slrndv38ti.7rh.sybrenUSE@schuimige.unrealtower.org>	<0001HW.C01764D700060858F0407550@news.individual.de>	<43f1aebb$0$1728$636a55ce@news.free.fr>
	<0001HW.C01772E1000952B1F0407550@news.individual.de>
Message-ID: <dssdgk$s5l$1@sea.gmane.org>

Kalle Anke wrote:
> I always thought that a SQLlite database "belonged" to a single process, can 
> a database be used by several processes?

Depending on what you mean by "belong", that's either true or false. 
Certainly multiple processes can access a SQLite database, although as 
the documentation clearly describes if those processes are making 
_frequent updates_ it's not the best solution and another database might 
be more suitable.

> Let's say I would build a small web application that would be used by a small 
> number of people/processes and it wouldn't be anything fancy just basic 
> "selects". What would be the choice for this?

SQLite.  (As but one option, but "just basic selects" is certainly 
included in the set of suitable conditions for SQLite use.)

> What about speed? I've always had the impression that while PostgreSQL is 
> more complete than MySQL it's also slower.

Don't optimize prematurely?  If you use something like SQLObject, or any 
other means of abstracting yourself away from the details of a specific 
datbase, you won't be particularly tied to it if you decide you need 
improved performance, or sophistication, or whatever.

> Sorry, if these are really stupid questions but ...

They're not.



From __peter__ at web.de  Fri Feb 10 03:53:41 2006
From: __peter__ at web.de (Peter Otten)
Date: Fri, 10 Feb 2006 09:53:41 +0100
Subject: breaking from loop
References: <1139557074.938577.281250@f14g2000cwb.googlegroups.com>
Message-ID: <dshk7o$i92$02$1@news.t-online.com>

Ritesh Raj Sarraf wrote:

> Following is the code:
> 
> def walk_tree_copy(sRepository, sFile, sSourceDir, bFound = None):
>     try:
>         if sRepository is not None:
>             for name in os.listdir(sRepository):
>                 path = os.path.join(sRepository, name)
>                 if os.path.isdir(path):
>                     walk_tree_copy(path, sFile, sSourceDir, bFound)
>                 elif name.endswith('.foo') or name.endswith('.bar'):
>                     if name == sFile:

Pick /one/ the conditions

- file name must be ...
- file must end with ... or ...

>                         try:
>                             shutil.copy(path, sSourceDir)
>                         except IOError, (errno, errstring):
>                             errfunc(errno, errstring)
>                         except shutil.Error:
>                             print name + " is available in " +
> sSourceDir + "Skipping Copy!"
>                         bFound = True
>                         break
>                         return bFound
>     except OSError, (errno, strerror):
>         print errno, strerror
> 
> This function allows me to walk into a directory based tree and search
> for files ending with .foo and .bar. My requirement is to copy
> .foo/.bar.
> Say in directory temp=>test=>test.bar is found. So shutil.copy will
> copy it. I want that once the copy is done, it should make bFound =
> True and get out.
> But since test directory is under temp, work_tree_copy makes two calls
> of the same function _but_ break only is able to get out from the inner
> call.
> 
> Where am I wrong in this code ? Is there a better way to implement it ?

An implementation on top of os.walk() can simplify things a bit:

import os
import shutil

def files(root):
    for path, folders, files in os.walk(root):
        for file in files:
            yield path, file

def copy_first_match(repository, filename, dest_dir): # aka walk_tree_copy()
    for path, file in files(repository):
        if file == filename:
            shutil.copy(os.path.join(path, file), dest_dir)
            return True
    return False

files() and os.walk() take care of the recursion, and you can just break or
return from the loop in copy_first_match(). 

Peter



From rzantow at gmail.com  Thu Feb 23 15:39:38 2006
From: rzantow at gmail.com (Rick Zantow)
Date: Thu, 23 Feb 2006 15:39:38 -0500
Subject: "Temporary" Variable
References: <1140665472.203495.7570@g44g2000cwa.googlegroups.com>
	<43FD6645.3020201@REMOVEMEcyber.com.au>
	<1140725159.143882.202630@j33g2000cwa.googlegroups.com>
Message-ID: <Xns97739F4E0BD97rzed@208.49.80.253>

darthbob88 at gmail.com wrote in news:1140725159.143882.202630
@j33g2000cwa.googlegroups.com:

> 
> Steven D'Aprano wrote:
>> You could try this:
>>
>> while 1:
>>      var = raw_input("Give me some data! ")
>>      if var == "some data":
>>          print "Success!"
>>          break
>>      else:
>>          print "No good, try again."
> That works fine with strings and when "some_data" is hardcoded. I run
> into trouble when "some data" is replaced with a number, unquoted. It
> simply says "No good, etc"

Raw_input isn't giving you what you think it is. You're comparing it to 
an integer, not a string. Does that help?



From bblais at bryant.edu  Thu Feb 16 18:40:47 2006
From: bblais at bryant.edu (Brian Blais)
Date: Thu, 16 Feb 2006 18:40:47 -0500
Subject: calculating on matrix indices
Message-ID: <43F50D7F.8010108@bryant.edu>

Hello,

In my attempt to learn python, migrating from matlab, I have the following problem. 
Here is what I want to do, (with the wrong syntax):

from numpy import *

t=arange(0,20,.1)
x=zeros(len(t),'f')

idx=(t>5)
tau=5
x[idx]=exp(-t[idx]/tau)  # <---this line is wrong (gives a TypeError)

#------------------

what is the best way to replace the wrong line with something that works: replace all 
of the values of x at the indices idx with exp(-t/tau) for values of t at indices idx?

I do this all the time in matlab scripts, but I don't know that the pythonic 
preferred method is.



			thanks,

				bb


-- 
-----------------

             bblais at bryant.edu
             http://web.bryant.edu/~bblais


From jimlewis at miclog.com  Sat Feb 11 05:03:46 2006
From: jimlewis at miclog.com (swisscheese)
Date: 11 Feb 2006 02:03:46 -0800
Subject: Shortest prime number program
Message-ID: <1139652226.869102.310180@g14g2000cwa.googlegroups.com>

I figured someone out there must have written a minimal code size prime
number generator. I did not find one after a bit of searching around.
For primes up to 100 the best I could do was 70 characters (including
spaces):

r=range(2,99)
m=[x*y for x in r for y in r]
[x for x in r if not x in m]



From fuzzyman at gmail.com  Wed Feb 15 05:45:52 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 15 Feb 2006 02:45:52 -0800
Subject: [ANN] Movable Python 1.0.1
Message-ID: <1140000352.656993.266690@g43g2000cwa.googlegroups.com>

I'm pleased to be able to announce the release of `Movable Python 1.0.1
<http://www.voidspace.org.uk/python/movpy/>`_. This includes the
release of **Movable Python** for Python 2.2.

To obtain it, visit the `Movable Python Shop
<http://voidspace.tradebit.com/groups.php>`_.

Existing users of Movable Python can go to the groups area and simply
download an updated copy.

.. note::

    For a heads up about possible features in the *next* version of a
Movable Python, visit the `Voidspace Techie Blog
<http://www.voidspace.org.uk/python/weblog/index.shtml>`_.

What's New ?
==========

Added support for the ``-m`` command line option. This works for
modules contained within the ``library.zip``, as well as other modules
on ``sys.path``.

**Movable Python** now *ignores* (with warnings) the unsupported Python
command line options.

Error messages are now printed to ``sys.stderr``.

Can run '.pyc' and '.pyo' files.

``customize.py`` now run when launching an interactive interpreter.

Renamed the function to go interactive to ``interactive_mode``.

New variable available in ``customize.py``. ``interactive``, this is
``True`` if launching an interactive interpreter. This allows you to
customize the environment differently for interactive sessions.

Add the ``lib`` directory (etc) to ``sys.path`` before entering
interactive mode. (BUGFIX)

``pywin32`` extensions now import properly (even on machines that don't
have them installed). (BUGFIX) {sm;:oops:}

Added the extra files for `Firedrop2 Macros
<http://www.voidspace.org.uk/python/firedrop2/macros.html>`_.

Changes for Python 2.2 compatibility. Distribution for Python 2.2
built.

What is Movable Python ?
===================

**Movable Python** is a distribution of Python for Windows that doesn't
need to be installed. It easily fits onto a USB memory stick. Python on
a stick.

It is integrated with SPE, the Python IDE, to make **Movable Python** a
portable Build, Test, and Run environment. It has a nice GUI to launch
programs and control its behaviour.

Movable Python is useful in the following situations:

* Machines where you can't install programs.
* Where you need a portable 'Build, Test, and Run' Python environment.
* Having several versions of Python on the same machine for
forward/backward compatibility testing.
* Easily deploying Python scripts without having to install Python.
* Try before you buy - test Python without having to install it,
including new versions .
* 'Python Runtime Environment'. '``.py``' files can be associated with
movpy.

For more information, see `An Introduction to Movable Python
<http://www.voidspace.org.uk/python/movpy/introduction.html>`_.


Known Issues
==========

* There are problems with the ``pywin32`` extensions and Python 2.2.
They are included but may not all function correctly.
* ``-m`` doesn't work with modules in ``library.zip`` under Python 2.2.
This may or may not be resolvable.
* **Movable Python** doesn't yet handle ``from __future__ import ...``
statements in scripts that are run. This will be fixed.



From FASTedob at XXhomemail.YEScom.OZau  Wed Feb  8 02:27:29 2006
From: FASTedob at XXhomemail.YEScom.OZau (Eddie)
Date: Wed, 08 Feb 2006 07:27:29 GMT
Subject: RPy / R
In-Reply-To: <kiWFf.507$U35.88@fe02.lga>
References: <kiWFf.507$U35.88@fe02.lga>
Message-ID: <43e99d61@news.comindico.com.au>

Hi Jason

I had more success, being able to run a few test programs.
Not sure why yours would be crashing - I have a similar setup (Win XP 
SP2 with all updates) - my version of Python is the Activestate download 
(ActivePython-2.4.2.10-win32-x86.msi). Have you installed Numeric?
If all else fails might be worth trying to unistall Python and 
installing the Activestate version (which includes the Win32 extensions).

Good luck

Eddie

jason wrote:
> Hello:
> 
> I installed the following:
> 
> python-2.4.2.msi
> pywin32-207.win32-py2.4.exe
> R-2.2.1-win32.exe
> rpy-0.4.6-R-2.0.0-to-2.2.1-py24.win32.exe
> 
> on a Windows XP (SP2) box.
> 
> [SNIP]
> 
> Is this a setup issue? Thanks for your help.
> 
> 


From jcoleman at franciscan.edu  Sat Feb 25 14:30:45 2006
From: jcoleman at franciscan.edu (John Coleman)
Date: 25 Feb 2006 11:30:45 -0800
Subject: Is Python a Zen language?
In-Reply-To: <9o1Mf.39804$H71.16633@newssvr13.news.prodigy.com>
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
	<9o1Mf.39804$H71.16633@newssvr13.news.prodigy.com>
Message-ID: <1140895845.832636.269460@e56g2000cwe.googlegroups.com>


Bryan Olson wrote:
> John Coleman wrote:
> >    I have a rough classification of languages into 2 classes: Zen
> > languages and tool languages. A tool language is a language that is,
> > well, a *tool* for programming a computer. C is the prototypical tool
> > language. Most languages in the Algol family are tool languages. Visual
> > Basic and Java are also tool languages. On the other hand, a Zen
> > language is a language which is purported to transform your way of
> > thinking about programming. Lisp, Scheme, Forth, Smalltalk and (maybe)
> > C++ are Zen languages.
>
> I think that's a horrible classification. Every language is both.
> "Transform your way of thinking" from what? There is no
> distinguished canonical view of what a programming language looks
> like, from which all others must be strange and wondrous
> transformations.
>
> Lisp and Forth are not tools for programming a computer? Of course
> they are. Algol and Java don't transform people's thinking about
> programming? Nonsense.
>
>
> --
> --Bryan

You seem to have completly overlooked both the hedge word "rough" in my
first sentence and the qualifications in my third paragraph. I probably
was not sufficiently clear that I was describing some fairly sunjective
impressions.  It is a simple observation that devotees of the Scheme
language view their language as more than *just* a tool for programming
computers. To quote from the introduction to the first edition of SICP:

"we want to establish the idea that a computer language is not just a
way of getting a computer to perform operations but rather that it is a
novel formal medium for expressing ideas about methodology"
(http://mitpress.mit.edu/sicp/full-text/book/book.html).
It is also a simple observation that experts in VBScript *don't* walk
around talking like that. Scheme and VBScript are of course both Turing
complete, but they seem to have radically different cultures. Do you
disagree? Or, if you agree that there is a difference but don't like
the words "Zen" vs. "tool" to describe it, how would you articulate the
difference?

Again, just curious.

-John Coleman



From tim.golden at viacom-outdoor.co.uk  Wed Feb 15 06:37:25 2006
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Wed, 15 Feb 2006 11:37:25 -0000
Subject: choose and open a folder in Windows
Message-ID: <9A28C052FF32734DACB0A288A3533991044D2567@vogbs009.gb.vo.local>

[palo]

| But I didn't find how to make windows to open
| a given directory in file expolorer)
| P.

At the risk of suggesting the obvious, have you tried:

<code>
import os
os.system ("explorer.exe c:\\temp")
</code>

or 

<code>
import os
os.startfile ("c:\\temp")
</code>

or something similar?

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________


From reply.in.the.newsgroup at my.address.is.invalid  Thu Feb  2 06:57:11 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Thu, 02 Feb 2006 12:57:11 +0100
Subject: redirect and python
References: <1138865526.286565.282150@g14g2000cwa.googlegroups.com>
Message-ID: <5rs3u1t6g1rpeqj1179kui3pgbaakpksf6@4ax.com>

questions?:
>os.system("wget http://blah blah blah")

Why don't you use urllib(2) directly in Python?

-- 
Ren? Pijlman


From trentm at ActiveState.com  Mon Feb 20 18:50:33 2006
From: trentm at ActiveState.com (Trent Mick)
Date: Mon, 20 Feb 2006 15:50:33 -0800
Subject: Activestate python installation
In-Reply-To: <87r760n3tv.fsf@bigfoot.com>
References: <1140243666.990365.131220@f14g2000cwb.googlegroups.com>
	<87r760n3tv.fsf@bigfoot.com>
Message-ID: <20060220235033.GB13482@activestate.com>

[Chris Smith wrote]
> >>>>> "mik3" == mik3  <mik3l3374 at hotmail.com> writes:
> 
>     mik3> hi this is a question regarding installing Activestate
>     mik3> python whenever i try to install the latest Activestate
>     mik3> Python on WinXP SP2, it gives me error saying "The wizard
>     mik3> was interrupted before Activestate 2.4.2 could be completely
>     mik3> installed. Your system has not been modified ....."  any
>     mik3> ideas why this is going on?  thanks
> 
> Administrator?
> Writeable drive?
> Is there an install log file you could locate?

As "David" mentioned on activepython at listserv.activestate.com, could
this be due to an anti-virus program aborting the install on you?

You could generate an install log to see if that yields some clues:
    http://aspn.activestate.com/ASPN/docs/ActivePython/2.4/installnotes.html#install_logging

Cheers,
Trent

-- 
Trent Mick
TrentM at ActiveState.com


From gregtech at wp.pl  Mon Feb 20 18:02:54 2006
From: gregtech at wp.pl (Grzegorz Smith)
Date: Tue, 21 Feb 2006 00:02:54 +0100
Subject: decorator and function local variable
Message-ID: <21b0qx59zcqo$.5dmxxfkxl7h3$.dlg@40tude.net>

Hi all. I have got situation that I need make parameter injection into
function and I want that parametet be a local variable of that function.
eg. something like
def decorator():
	<code>
@decorator
def myfun():
   a = 20

and in myfun i can use b wariable like that:
b = "ok it's working"
I try to use sample decorators from:
http://www.python.org/moin/PythonDecoratorLibrary 
but unsuccesfully. Does anyone know hot to achieve this? Or is it possible?
Thanks for any help


From deets at nospam.web.de  Sun Feb 26 15:11:20 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 26 Feb 2006 21:11:20 +0100
Subject: Do I need to convert string to integer in python?
In-Reply-To: <1140983754.000103.104710@i40g2000cwc.googlegroups.com>
References: <1140983754.000103.104710@i40g2000cwc.googlegroups.com>
Message-ID: <46egb9FanujjU1@uni-berlin.de>

Allerdyce.John at gmail.com schrieb:
> Do I need to convert string to integer in python? or it will do it for
> me (since dynamic type)?
> 
> In my python script, I have this line:
>     x /= 10;
> 
> when i run it, I get this error:
> TypeError: unsupported operand type(s) for /=: 'unicode' and 'int'
> 
> I want to divide x by 10 and assign that value back to x.

Yes, you have to convert beforehand. Dynamic typing and weak typing (as in perl or php) aren't the same thing.

Dynamic typing means that you can rebind a variable (or better name) at runtime to contain a value with a new type. Weak 
typing means that an object is reinterpreted as a value of another type when needed - and (often) leads to difficult errors.


Regards,

Diez


From ptmcg at austin.rr._bogus_.com  Tue Feb 21 23:37:50 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Wed, 22 Feb 2006 04:37:50 GMT
Subject: Basic coin flipper program - logical error help
References: <1140567243.251982.255620@g14g2000cwa.googlegroups.com>
	<UoOKf.49379$id5.43228@bgtnsc04-news.ops.worldnet.att.net>
	<oOadnVkfiM7aWmbeRVn-vw@comcast.com>
	<1140578858.586591.243900@g43g2000cwa.googlegroups.com>
Message-ID: <yURKf.22750$UN2.3873@tornado.texas.rr.com>

<bonono at gmail.com> wrote in message
news:1140578858.586591.243900 at g43g2000cwa.googlegroups.com...
>
> John Zenger wrote:
> > Also, with the functional programming tools of map, filter, and lambda,
> > this code can be reduced to just six lines:
> >
> > import random
> >
> > flips = map(lambda x: random.randrange(2), xrange(100))
> > heads = len(filter(lambda x: x is 0, flips))
> > tails = len(filter(lambda x: x is not 0, flips))
>
> Or a filter/map/lambda free way:
>
> heads = sum(random.randrange(2) for x in xrange(100))
> tails = 100 - heads
>
sort, then groupby.


import itertools
import random
h,t = [len(list(g)) for k,g in itertools.groupby(sorted([random.randrange(2)
for i in xrange(100)]))]
print h,t





From dickey at saltmine.radix.net  Wed Feb  8 19:16:28 2006
From: dickey at saltmine.radix.net (Thomas Dickey)
Date: Thu, 09 Feb 2006 00:16:28 -0000
Subject: Replacing curses
References: <mailman.1566.1139345769.27775.python-list@python.org>
	<43E9234B.6030108@v.loewis.de>
	<mailman.1588.1139372460.27775.python-list@python.org>
	<11ujl3ibdh7vne1@corp.supernews.com>
	<mailman.1602.1139418578.27775.python-list@python.org>
Message-ID: <11ul2eskh5q2pab@corp.supernews.com>

Ian Ward <ian at excess.org> wrote:
> Thomas Dickey wrote:
>> hmm - I've read Urwid, and most of the comments I've read in that regard
>> reflect problems in Urwid.  Perhaps it's time for you to do a little analysis.
>> 
>> (looking forward to bug reports, rather than line noise)

> A fair request.  My appologies for the inflammatory subject :-)

> When trying to check for user input without waiting I use code like:
> window_object.nodelay(1)
> curses.cbreak()
> input = window_object.getch()

> Occasionally (hard to reproduce reliably) the cbreak() call will raise
> an exception, but if I call it a second time before calling getch the
> code will work properly.  This problem might be related to a signal
> interrupting the function call, I'm not sure.

perhaps a more complete test-case would let me test it and see.

> Also, screen resizing only seems to be reported once by getch() even if
> the user continues to resize the window.  I have worked around this by
> calling curses.doupdate() between calls to getch(). Maybe this is by design?

Or perhaps it's some interaction with python - I don't know.
The applications that I use with resizing (and ncurses' test
programs) work smoothly enough.

> Finally, the curses escape sequence detection could be broadened. The
> top part of the curses_display module in Urwid defines many escape
> sequences I've run into that curses doesn't detect.

That's data (terminfo).  ncurses is data-driven, doesn't "detect"
features of the terminal (though it does of course use environment
variables for locale, etc.).

xterm's terminfo lists a lot of function keys, for instance.

The limit for predefined function-key names for terminfo is 60,
but ncurses can accept extended terminfo descriptions (but I like to
limit the length and style of names so it's possible to access them
from termcap).  One could define names like shift_f1, but then termcap
applications couldn't see them.  (The last I knew, slang doesn't either,
but that's a different thread).

That's been true for about 6 years.

Current xterm's terminfo includes these names which apply to your
comment:  The ones on the end are extended names that ncurses' tic
deduces from the terminfo file when it compiles it:

comparing xterm-new to xterm-xf86-v44.
    comparing booleans.
    comparing numbers.
    comparing strings.
        kf49: '\EO3P', NULL.
        kf50: '\EO3Q', NULL.
        kf51: '\EO3R', NULL.
        kf52: '\EO3S', NULL.
        kf53: '\E[15;3~', NULL.
        kf54: '\E[17;3~', NULL.
        kf55: '\E[18;3~', NULL.
        kf56: '\E[19;3~', NULL.
        kf57: '\E[20;3~', NULL.
        kf58: '\E[21;3~', NULL.
        kf59: '\E[23;3~', NULL.
        kf60: '\E[24;3~', NULL.
        kf61: '\EO4P', NULL.
        kf62: '\EO4Q', NULL.
        kf63: '\EO4R', NULL.
        kind: '\E[1;2B', NULL.
        kri: '\E[1;2A', NULL.
        kDN: '\E[1;2B', NULL.
        kDN5: '\E[1;5B', NULL.
        kDN6: '\E[1;6B', NULL.
        kLFT5: '\E[1;5D', NULL.
        kLFT6: '\E[1;6D', NULL.
        kRIT5: '\E[1;5C', NULL.
        kRIT6: '\E[1;6C', NULL.
        kUP: '\E[1;2A', NULL.
        kUP5: '\E[1;5A', NULL.
        kUP6: '\E[1;6A', NULL.

-- 
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net


From steve.horsley at gmail.com  Wed Feb 15 13:59:52 2006
From: steve.horsley at gmail.com (Steve Horsley)
Date: Wed, 15 Feb 2006 18:59:52 +0000
Subject: is socket thread safe?
In-Reply-To: <1139912679.559724.131020@f14g2000cwb.googlegroups.com>
References: <1139912679.559724.131020@f14g2000cwb.googlegroups.com>
Message-ID: <dsvtn8$qvv$1@news.freedom2surf.net>

e2wugui at gmail.com wrote:
> thread1:
>     while 1:
>         buf = s.read()
>         process(buf)
> 
> thread2:
>     while 1:
>         buf = getdata()
>         s.write(buf)
> 

It is safe, but watch out for this gotcha: If thread B calls 
s.close() while thread A is blocked in s.read(), thread A will 
never return from the read. My preferred solution is to set 
socket timeout to a few seconds, and loop checking a status flag 
so I know when to quit.

Steve


From struggleyb at gmail.com  Sat Feb 18 08:40:04 2006
From: struggleyb at gmail.com (Bo Yang)
Date: Sat, 18 Feb 2006 21:40:04 +0800
Subject: How many web framework for python ?
In-Reply-To: <4cldv1pi01vrkmfj7v1adpfhkdffvoa6jv@4ax.com>
References: <mailman.2085.1140244423.27775.python-list@python.org>
	<4cldv1pi01vrkmfj7v1adpfhkdffvoa6jv@4ax.com>
Message-ID: <43F723B4.80905@gmail.com>

Thank you very much !


From steve at REMOVETHIScyber.com.au  Wed Feb 15 07:14:46 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Wed, 15 Feb 2006 23:14:46 +1100
Subject: Which is faster? (if not b in m) or (if m.count(b) > 0)
References: <1139976842.179801.285400@z14g2000cwz.googlegroups.com>
	<pan.2006.02.15.07.44.08.876338@gmx.net>
Message-ID: <pan.2006.02.15.12.14.46.964790@REMOVETHIScyber.com.au>

On Wed, 15 Feb 2006 08:44:10 +0100, Marc 'BlackJack' Rintsch wrote:

> In <1139976842.179801.285400 at z14g2000cwz.googlegroups.com>, Farel wrote:
> 
>> Which is Faster in Python and Why?
> 
> ``if not b in m`` looks at each element of `m` until it finds `b` in it
> and stops then.  Assuming `b` is in `m`, otherwise all elements of `m` are
> "touched".
> 
> ``if m.count(b) > 0`` will always goes through all elements of `m` in the
> `count()` method.

But the first technique executes in (relatively slow) pure Python, while
the count method executes (relatively fast) C code. So even though count
may do more work, it may do it faster.

The only way to tell for sure is to actually time the code, not try to
guess.



-- 
Steven.



From http  Mon Feb 13 19:05:07 2006
From: http (Paul Rubin)
Date: 13 Feb 2006 16:05:07 -0800
Subject: invert the order of a string
References: <dsr600$9sj$1@solaris.cc.vt.edu>
Message-ID: <7xek26erf0.fsf@ruckus.brouhaha.com>

rtilley <rtilley at vt.edu> writes:
> s = list('some_random_string')
> print s
> s.reverse()
> print s
> s = ''.join(s)
> print s
> 
> Surely there's a better way to do this, right?

In Python 2.4, just say
  s = reversed('some_random_string')


From duncanm255 at hotmail.com  Tue Feb 28 19:30:14 2006
From: duncanm255 at hotmail.com (D)
Date: 28 Feb 2006 16:30:14 -0800
Subject: Py2exe
In-Reply-To: <SP6dnXJDhdXfW5nZnZ2dnUVZ_s6dnZ2d@comcast.com>
References: <1141160676.947534.123630@t39g2000cwt.googlegroups.com>
	<1141162463.658164.34110@i40g2000cwc.googlegroups.com>
	<1141162697.347464.49420@i40g2000cwc.googlegroups.com>
	<SP6dnXJDhdXfW5nZnZ2dnUVZ_s6dnZ2d@comcast.com>
Message-ID: <1141173014.776837.150600@u72g2000cwu.googlegroups.com>

Thanks Larry - that is exactly what I needed!  I do have the program
written to be a service, and now plan to use py2exe and Inno Setup to
package it up. 

Doug



From iainking at gmail.com  Wed Feb  1 04:06:39 2006
From: iainking at gmail.com (Iain King)
Date: 1 Feb 2006 01:06:39 -0800
Subject: wxPython Conventions
In-Reply-To: <1138684467.864196.212400@f14g2000cwb.googlegroups.com>
References: <1138684467.864196.212400@f14g2000cwb.googlegroups.com>
Message-ID: <1138784799.435953.251980@g43g2000cwa.googlegroups.com>


Jared Russell wrote:

> To mess around with it, I decided to create a small app to check my
> Gmail.  I want something that will just sit in my system tray checking
> for new emails every ten minutes or so.

How do you gain access to the system tray?

Iain



From steve at hastings.org  Fri Feb 24 01:22:04 2006
From: steve at hastings.org (Steve R. Hastings)
Date: Thu, 23 Feb 2006 22:22:04 -0800
Subject: PyAtom, a Python module for creating Atom syndication feeds
References: <pan.2006.02.23.08.53.39.65246@hastings.org>
	<87mzgicute.fsf@voodoo.myself>
	<pan.2006.02.23.09.27.32.582881@hastings.org>
	<87hd6qcsgl.fsf@voodoo.myself>
	<pan.2006.02.23.17.52.44.595425@hastings.org>
Message-ID: <pan.2006.02.24.06.22.03.888436@hastings.org>

I have edited PyAtom, and now it should be in better conformance with the
PEP 8 guidelines.  It is available from the same place as before:

http://www.blarg.net/~steveha/pyatom.tar.gz

-- 
Steve R. Hastings    "Vita est"
steve at hastings.org    http://www.blarg.net/~steveha



From codecraig at gmail.com  Tue Feb 28 09:23:54 2006
From: codecraig at gmail.com (abcd)
Date: 28 Feb 2006 06:23:54 -0800
Subject: error: argument after ** must be a dictionary
Message-ID: <1141136634.030745.256120@e56g2000cwe.googlegroups.com>

I have class like this...

import threading
class MyBlah(object):
    def __init__(self):
        self.makeThread(self.blah, (4,9))

    def blah(self, x, y):
        print "X and Y:", x, y

    def makeThread(self, func, args=(), kwargs={}):
        threading.Thread(target=self.blah, args=args,
kwargs=kwargs).start()

When I do...
b = MyBlah()

I am getting this error:
TypeError:  MyBlah object argument after ** must be a dictionary

What am I missing?



From fredrik at pythonware.com  Fri Feb  3 03:39:39 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 3 Feb 2006 09:39:39 +0100
Subject: How do I dynamically create functions without lambda?
References: <1138389517.896043.7450@g47g2000cwa.googlegroups.com><pan.2006.01.28.00.35.06.174939@REMOVETHIScyber.com.au><1138436008.628882.126510@g44g2000cwa.googlegroups.com><pan.2006.01.28.12.02.34.293286@REMOVETHIScyber.com.au><drr978$oat$1@xenon.Stanford.EDU><1ha3g79.1gcm6x1yziggyN%aleaxit@yahoo.com><mailman.1358.1138907003.27775.python-list@python.org><1ha5e9r.gs34le12dm1luN%aleaxit@yahoo.com>
	<20060203014442.21daa210@samwise.anansi>
Message-ID: <drv4sd$lhb$1@sea.gmane.org>

Terry Hancock wrote:

> Frankly this paper sounds like a bid for the "Journal of
> Irreproducible Results" that somehow got accidentally
> submitted to a serious journal

    http://www.improbable.com/ig/ig-pastwinners.html#ig2000

</F>





From fredrik at pythonware.com  Wed Feb 15 11:59:55 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 15 Feb 2006 17:59:55 +0100
Subject: Embedding a binary file in a python script
References: <1140021879.698353.324230@o13g2000cwo.googlegroups.com>
Message-ID: <dsvmmd$ic1$1@sea.gmane.org>

"mrstephengross" wrote:

> I want to find a way to embed a tar file *in* my python script, and
> then use the tarfile module to extract it. That is, instead of
> distributing two files (extractor.py and archive.tar) I want to be able
> to distribute *one* file (extractor-with-embedded-archive.py). Is there
> a way to do this?

I'm not sure I understand why you think you need to embed a tarfile
(why not just embed the actual files?), but here's an outline:

$ echo hello >hello.txt
$ echo world >world.txt
$ tar cvfz archive.tar hello.txt world.txt
hello.txt
world.txt
$ ls -l archive.tar
-rw-r--r--  1 effbot effbot 151 2006-02-15 17:52 archive.tar

$ python
>>> import base64, sys
>>> base64.encode(open("archive.tar", "rb"), sys.stdout)
H4sIAPlc80MAA+3TwQqDMAzG8Z73FH2CkWqbPs/GFA+FguvYHn8qQ3aaJ3XC/3cJJJeQ8HVNSvlc
XsWsRwbq/VhdDPJdP9Q4qaPXoFIPfVdVTo2VFXeaPe7l0ltrmra95h9XWJofVDf+/7T3FtjLM/fp
9lf5D1P+fST/W5j+T/4BAAAAAAAAAAAAAAAO6w1uw+KBACgAAA==
>>> ^D

$ python
>>> import base64, cStringIO, tarfile
>>> f = cStringIO.StringIO(base64.decodestring("""
... H4sIAPlc80MAA+3TwQqDMAzG8Z73FH2CkWqbPs/GFA+FguvYHn8qQ3aaJ3XC/3cJJJeQ8HVNSvlc
... XsWsRwbq/VhdDPJdP9Q4qaPXoFIPfVdVTo2VFXeaPe7l0ltrmra95h9XWJofVDf+/7T3FtjLM/fp
... 9lf5D1P+fST/W5j+T/4BAAAAAAAAAAAAAAAO6w1uw+KBACgAAA==
... """))
>>> f
<cStringIO.StringI object at 0xb7de85f0>
>>> tar = tarfile.TarFile.gzopen("dummy", fileobj=f)
>>> tar.list()
-rw-r--r-- effbot/effbot          6 2006-02-15 17:51:36 hello.txt
-rw-r--r-- effbot/effbot          6 2006-02-15 17:51:41 world.txt
>>> tar.extractfile("hello.txt").read()
'hello\n'

hope this helps!

</F>





From steve at REMOVEMEcyber.com.au  Tue Feb 21 02:59:40 2006
From: steve at REMOVEMEcyber.com.au (Steven D'Aprano)
Date: Tue, 21 Feb 2006 18:59:40 +1100
Subject: how to break a for loop?
References: <1140476451.649515.127230@g44g2000cwa.googlegroups.com>
	<1140477343.684115.222490@z14g2000cwz.googlegroups.com>
Message-ID: <43FAC86C.4020505@REMOVEMEcyber.com.au>

Petr Jakes wrote:

> zero_list=[0,0,0,0,0,1,2,3,4]
> for x in range(len(zero_list)):
>     if zero_list[x]!=0: break
> nonzero_list=zero_list[x:]
> print nonzero_list
> 
> but some more "pythonic" solutions will be posted from other users I
> guess :)


That looks perfectly Pythonic to me.

You know, just because Python has for loops and 
multi-line blocks of code doesn't mean we shouldn't use 
them *wink*


-- 
Steven.



From steve at REMOVEMEcyber.com.au  Tue Feb 21 04:19:05 2006
From: steve at REMOVEMEcyber.com.au (Steven D'Aprano)
Date: Tue, 21 Feb 2006 20:19:05 +1100
Subject: getting started, .py file
References: <1140471172.783876.80400@g14g2000cwa.googlegroups.com>
	<mailman.2186.1140473000.27775.python-list@python.org>
	<1140476484.581881.230170@o13g2000cwo.googlegroups.com>
Message-ID: <43FADB09.4020408@REMOVEMEcyber.com.au>

Ingrid wrote:

> Thanks everyone. That's exactly what I was looking for, but I still
> can't seem to make it work. I've got the interpreter starting in
> "C:\Program Files\Python2.4", and my code is in "C:\Documents and
> Settings\Ingrid\My Documents". So, I did:
>   import os
>   os.chdir("C:\\Documents and Settings\\Ingrid\\My Documents")
>   from mycode import *

I see that Ingrid found the solution to this problem. 
But I wonder, should Python support importing absolute 
pathnames?

I've trying googling, but either my google skills are 
lacking or nobody has ever thought of doing import 
"C:\directory\module" before.


-- 
Steven.



From onurb at xiludom.gro  Thu Feb 16 17:15:12 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Thu, 16 Feb 2006 23:15:12 +0100
Subject: embedding python in HTML
In-Reply-To: <8n6Jf.1640$No6.38203@news.tufts.edu>
References: <GD5Jf.1637$No6.38292@news.tufts.edu>
	<t6q9v1p2qcr0ntsau8i6q5glk89pfb4epq@4ax.com>
	<8n6Jf.1640$No6.38203@news.tufts.edu>
Message-ID: <43f4f98e$0$16930$636a55ce@news.free.fr>

John Salerno wrote:
> Rene Pijlman wrote:
> 
>> John Salerno:
>> [Python alternative for PHP]
>>
>>> So to do this with Python, do I simply integrate it into the HTML as
>>> above, with no extra steps? 
>>
>>
>> You'd need something like the PHP engine, that understands Python rather
>> than PHP.
> 
> 
> My web server can run Python, fortunately. Now that they've turned it on
> for me, I wanted to try it out, but I didn't know how to go about
> writing a bit of code to stick into an HTML file.

You've got to understand that Python is *not* a 'ServerPage' language
(-> php, asp, jsp etc) in itself. Your server can now run python, fine,
but *how* ? CGI ? FastCGI ? mod_python ? other ? (hint: it's probably
just plain old CGI...)


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From timr at probo.com  Sun Feb 26 23:53:34 2006
From: timr at probo.com (Tim Roberts)
Date: Mon, 27 Feb 2006 04:53:34 GMT
Subject: spaces at ends of filenames or directory names on Win32
References: <dtkuav$keb$1@solaris.cc.vt.edu>
	<1140897423.932377.304640@i39g2000cwa.googlegroups.com>
Message-ID: <4s0502dknn9k07bpa7d80emeno2tkar7p7@4ax.com>

drobinow at gmail.com wrote:

>For example... tell windows to move a file named ' XXX ' (one space
>before and one space after the filename). Windows will complain that
>file 'XXX' does not exist. It's correct of course, 'XXX' does not
>exist,
>but ' XXX ' does indeed exist.
>
>Can anyone rescue me from this madness :(

Use double-quotes on Windows, not single-quotes.  Single-quotes are taken
as just another filename character.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From finite.automaton at gmail.com  Fri Feb 24 03:00:59 2006
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 24 Feb 2006 00:00:59 -0800
Subject: automatic html generation for documentation?
Message-ID: <1140768059.871220.110300@j33g2000cwa.googlegroups.com>

I plan on writing some documentation that will consist of blocks of
commentary with interspersed snippets of syntax-colored Python code and
the occaisional image.

Does anyone know of a package that will take a high level description
of what I just described and auto-generate clean-looking web pages,
including syntax coloring?   I'm already using epydoc for API reference
generation; what I'm looking for here is just something to help out
with the narrative so I don't have to spend lots of time fiddling with
HTML.



From Sibylle.Koczian at Bibliothek.Uni-Augsburg.de  Thu Feb 16 10:38:30 2006
From: Sibylle.Koczian at Bibliothek.Uni-Augsburg.de (Sibylle Koczian)
Date: Thu, 16 Feb 2006 16:38:30 +0100
Subject: question about scope
In-Reply-To: <9J0Jf.1630$No6.38274@news.tufts.edu>
References: <9J0Jf.1630$No6.38274@news.tufts.edu>
Message-ID: <45jkjnF6q6bcU1@news.dfncis.de>

John Salerno schrieb:
> Here's a sentence from Learning Python:
> 
> "Names not assigned a value in the function definition are assumed to be
> enclosing scope locals (in an enclosing def), globals (in the enclosing
> module's namespace) or built-in (in the predefined __builtin__ names
> module Python provides."
> 
> I have trouble reading this sentence. First, I don't understand if the
> word 'enclosing' is a verb or an adjective. The whole flow of the
> sentence seems convoluted.
> 
> But my real question is this, which is related to the above:
> 
> "Name references search at most four scopes: local, then enclosing
> functions (if any), then global, then built-in."
> 
> I understand what global and built-in are, and I thought I understood
> the concept of local too, but when I got to this sentence (and the
> previous sentence), I became confused about the first two scopes. What's
> the difference between 'local' and 'enclosing functions'? I thought that
> the only way to create a local namespace was if there *was* a function
> definition, so now I'm confused by the apparent difference that the
> authors are referring to. What's an example of a local scope without
> having a function definition? Loops and if statements, perhaps?
> 

Nested functions, I should think. Absolutely silly, but working example:

>>> def outer():
	    arg_in = 2
	    def inner():
		    x = arg_in * 3
		    return x
	    return inner()
>>> outer()
6

Seen from the inside of "inner" x is local, arg_in is in the enclosing
function.



-- 
Dr. Sibylle Koczian
Universitaetsbibliothek, Abt. Naturwiss.
D-86135 Augsburg
e-mail : Sibylle.Koczian at Bibliothek.Uni-Augsburg.DE


From dprovins at rpcl.com  Wed Feb 22 11:45:12 2006
From: dprovins at rpcl.com (Dean Allen Provins)
Date: Wed, 22 Feb 2006 16:45:12 GMT
Subject: Tkinter canvas size determination
Message-ID: <43FC9532.2050800@rpcl.com>

I need to determine the size of a canvas while the process is running.
Does anyone know of a technique that will let me do that?

Thanks,

Dean


From altis at semi-retired.com  Thu Feb  2 13:12:44 2006
From: altis at semi-retired.com (Kevin Altis)
Date: Thu, 2 Feb 2006 10:12:44 -0800
Subject: ANNOUNCE: OSCON 2006 (Python 14 Conference) Proposals due Feb. 13th
Message-ID: <yQrEf.40$cJ2.9825@news.uswest.net>

OSCON 2006: Opening Innovation
http://conferences.oreillynet.com/os2006/

Save the date for the 8th annual O'Reilly Open Source Convention, happening
July 24-28, 2006 at the Oregon Convention Center in beautiful Portland,
Oregon.



Call For Participation
----------------------

Submit a proposal-fill out the form at:

http://conferences.oreillynet.com/cs/os2006/create/e_sess/

Important Dates:

* Proposals Due: Midnight (PST) February 13, 2006
* Speaker Notification: March 27, 2006
* Tutorial Presentation Files Due: June 12, 2006
* Session Presentation Files Due: June 26, 2006
* Conference: July 24-28, 2006

Proposals
---------

We are considering proposals for 45 minute sessions and 3 hour tutorials.
We rarely accept 90 minute proposals, as most general sessions are 45
minutes in length.  Your proposals are examined by a committee which draws
from them and which also solicits proposals to build the program.  Proposals
are due by midnight (PST), Feb. 13, 2006.  The OSCON Speaker Manager, Vee
McMillen, emails notification of the status of your talk (accepted or
otherwise) by March 27, 2006.  Unless the content of your talk is
particularly timely (e.g., features of a product that will be launched at
OSCON), you are required to send us your slides several weeks before the
conference begins. Submit proposals via the form below.

Some tips for writing a good proposal for a good talk:

* Keep it free of marketing: talk about open source software, but not about
a commercial product--the audience should be able to use and improve the
things you talk about without paying money
* Keep the audience in mind: they're technical, professional, and already
pretty smart.
* Clearly identify the level of the talk: is it for beginners to the topic,
or for gurus?  What knowledge should people have when they come to the talk?
* Give it a simple and straightforward title: fancy and clever titles make
it harder for people (committee and attendees) to figure out what you're
really talking about
* Limit the scope of the talk: in 45 minutes, you won't be able to cover
Everything about Widget Framework X.  Instead, pick a useful aspect, or a
particular technique, or walk through a simple program.
* Pages of code are unreadable: mere mortals can deal with code a line at a
time.  Sometimes three lines at a time.  A page of code can't be read when
it's projected, and can't be comprehended by the audience.
* Explain why people will want to attend: is the framework gaining traction?
Is the app critical to modern systems?  Will they learn how to deploy it,
program it, or just what it is?
* Let us know in your proposal notes whether you can give all the talks you
submitted proposals for
* Explain what you will cover in the talk

NOTE: All presenters whose talks are accepted (excluding Lightning Talks)
will receive free registration at the conference. For each half-day
tutorial, the presenter receives one night's accommodation, a limited travel
allowance, and an honorarium. We give tutors and speakers registration to
the convention (including tutorials), and tutors are eligible for a travel
allowance: up to US$300 from the west coast of the USA, up to US$500 from
the east coast of the USA, up to US$800 from outside the USA.

Registration opens April, 2006. If you would like to be notified by email
when registration opens, please use the form on our main page.



CONFERENCE INFO
===============

The O'Reilly Open Source Convention is where coders, sysadmins,
entrepreneurs, and business people working in free and open source software
gather to share ideas, discover code, and find solutions. At OSCON 2005,
more than 2,400 attendees took part in 241 sessions and tutorials across
eleven technology tracks, learning about the newest features and versions
from creators and experts. A record number of products launches and
announcements were made, and sponsors and exhibitors from a wide range of
companies filled the largest exhibit hall in OSCON's history. We anticipate
that OSCON 2006 will be even more successful, and continue to be the place
for the open source community to meet up, debate, make deals, and connect
face to face. OSCON 2006 will take place at the Oregon Convention Center in
Portland, Oregon July 24-28, 2006.

OSCON 2006 will feature the projects, technologies, and skills that you need
to write and deploy killer modern apps.  We're looking for proposals on
platforms and applications around:

* Multimedia including voice (VoIP) and video
* AI including spam-busting, classification, clustering, and data mining
* Collaboration including email, calendars, RSS, OPML, mashups, IM,
presence, and session initialization
* Project best practices including governance, starting a project, and
managing communities
* Microsoft Windows-based open source projects including .NET, Mono, and
regular C/C++/Visual Basic Windows apps
* Enterprise Java techniques including integration, testing, and scalable
deployment solutions
* Linux kernel skills for sysadmins including virtualization, tuning, and
device drivers
* Device hacking including iPods, Nintendo, PSP, XBox 360, and beyond
* Design including CSS, GUI, and user experience (XP)
* Entrepreneurial topics including management for techies, how to go into
business for yourself, and business models that work
* Security including hardening, hacking, root kits (Sony and otherwise), and
intrusion detection/cleanup
* Fun subjects with no immediate commercial application including retro
computing, games, and BitTorrent

Tracks at OSCON will include:

* Desktop Apps
* Databases, including MySQL, PostgreSQL, Ingres, and others
* Emerging Topics
* Java
* Linux Kernel for SysAdmins
* Linux for Programmers
* Perl, celebrating the 10th year of The Perl Conference!
* PHP
* Programming, including everything that's not specific to a particular
language
* Python
* Security
* Ruby, including Ruby on Rails
* Web Apps, including Apache
* Windows




From mensanator at aol.com  Sun Feb 12 10:06:52 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 12 Feb 2006 07:06:52 -0800
Subject: Tracking down memory leaks?
In-Reply-To: <1139749861.949765.282310@z14g2000cwz.googlegroups.com>
References: <1139749861.949765.282310@z14g2000cwz.googlegroups.com>
Message-ID: <1139756812.174596.159860@g14g2000cwa.googlegroups.com>


MKoool wrote:
> I have an application with one function called "compute", which given a
> filename, goes through that file and performs various statistical
> analyses.  It uses arrays extensively and loops alot.  it prints the
> results of it's statistical significance tests to standard out.  Since
> the compute function returns and I think no variables of global scope
> are being used, I would think that when it does, all memory returns
> back to the operating system.
>
> Instead, what I see is that every iteration uses several megs more.
> For example, python uses 52 megs when starting out, it goes through
> several iterations and I'm suddenly using more than 500 megs of ram.
>
> Does anyone have any pointers on how to figure out what I'm doing
> wrong?

Are you importing any third party modules? It's not unheard of that
someone else's code has a memory leak.

> 
> Thanks,
> mohan



From steve at REMOVETHIScyber.com.au  Thu Feb 23 10:53:29 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 24 Feb 2006 02:53:29 +1100
Subject: Using repr() with escape sequences
References: <1140708756.484933.13390@z14g2000cwz.googlegroups.com>
Message-ID: <pan.2006.02.23.15.53.28.462638@REMOVETHIScyber.com.au>

On Thu, 23 Feb 2006 07:32:36 -0800, nummertolv wrote:

> Hi,
> 
> My application is receiving strings, representing windows paths, from
> an external source. When using these paths, by for instance printing
> them using str() (print path), the backslashes are naturally
> interpreted as escape characters.
> 
>>>> print "d:\thedir"
> d:	hedir

No. What is happening here is not what you think is happening.

> The solution is to use repr() instead of str():

The solution to what? What is the problem? The way the strings are
DISPLAYED is surely not the issue, is it?

>>>> print repr("d:\thedir")
> 'd:\thedir'


You have created a string object: "d:\thedir"

That string object is NOT a Windows path. It contains a tab character,
just like the print statement shows -- didn't you wonder about the large
blank space in the string?

Python uses backslashes for character escapes. \t means a tab character.
When you enter "d:\thedir" you are embedding a tab between the colon and
the h.

The solutions to this problem are:

(1) Escape the backslash: "d:\\thedir"

(2) Use raw strings that don't use char escapes: r"d:\thedir"

(3) Use forward slashes, and let Windows automatically handle them:
"d:/thedir"

However, if you are receiving strings from an external source, as you say,
and reading them from a file, this should not be an issue. If you read a
file containing "d:\thedir", and print the string you have just read, the
print statement uses repr() and you will see that the string is just
what you expect:

d:\thedir

You can also check for yourself that the string is correct by looking at
its length: nine characters.


-- 
Steven.



From peter at engcorp.com  Fri Feb 10 08:29:38 2006
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 10 Feb 2006 08:29:38 -0500
Subject: Thread Dump of a python process
In-Reply-To: <2868401.post@talk.nabble.com>
References: <2840609.post@talk.nabble.com> <dsflkk$k69$1@sea.gmane.org>
	<2868401.post@talk.nabble.com>
Message-ID: <dsi4g3$721$2@sea.gmane.org>

Shanon wrote:
> Thank you for your info. Now I have read that a simple call os.getpid()
> returned the linux identifier of the thread in latest python versions, but
> I'm using Python 2.3 and 2.4 and this call returns always the same id 
> I only want to take the pid of the thread but isn't as easier as it seems.

Oops, please ignore my other reply to this post.  I didn't grab the 
start_new_thread() result, but instead grabbed the result of 
thread.get_ident() and stored that.  The docs claim this is not a value 
that necessarily relates to anything in the outside world ("Return the 
`thread identifier' of the current thread. This is a nonzero integer. 
Its value has no direct meaning; it is intended as a magic cookie ...") 
so if it happens to match the thread id from the OS's point of view, 
it's an implementation detail you couldn't rely on.

So the general idea I gave might be useful, but I don't know precisely 
how to do exactly what you are asking.  Sorry.

-Peter



From siv.hansen at gmail.com  Mon Feb 27 19:31:09 2006
From: siv.hansen at gmail.com (Cruella DeVille)
Date: 27 Feb 2006 16:31:09 -0800
Subject: Catch exceptions
In-Reply-To: <1141085325.698323.297100@v46g2000cwv.googlegroups.com>
References: <1141083485.798371.188440@u72g2000cwu.googlegroups.com>
	<1141085325.698323.297100@v46g2000cwv.googlegroups.com>
Message-ID: <1141086669.334852.80660@u72g2000cwu.googlegroups.com>

I put the try catch in my main-method, and it worked to some extent
(except from when I try to read from a file with no content)

Any idea how to solve that?
And is it a good place to have a try-except in main instead of in the
class methods?

My code is at http://nibbler.no/blog/wp-includes/Bookmarks.py



From kp8 at mac.com  Fri Feb 24 15:14:32 2006
From: kp8 at mac.com (kpp9c)
Date: 24 Feb 2006 12:14:32 -0800
Subject: ls files --> list packer
In-Reply-To: <dtmo3g$jg5$1@wake.carmen.se>
References: <1140765792.864556.289820@i40g2000cwc.googlegroups.com>
	<1140767111.490691.42460@e56g2000cwe.googlegroups.com>
	<1140768527.006363.29050@i39g2000cwa.googlegroups.com>
	<dtmo3g$jg5$1@wake.carmen.se>
Message-ID: <1140812071.998261.92610@i40g2000cwc.googlegroups.com>

that is nice.... but the little further wrinkle, which i have no idea
how to do, would be to have the contents of each directory packed into
a different list.... since you have no idea before hand how many lists
you will need (how many subdirs you will enounter)  ... well that is
where the hairy part comes in...

-kp--



From tim.golden at viacom-outdoor.co.uk  Mon Feb 13 11:13:18 2006
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Mon, 13 Feb 2006 16:13:18 -0000
Subject: Execute batch script on remote computer
Message-ID: <9A28C052FF32734DACB0A288A3533991044D254E@vogbs009.gb.vo.local>

[py]

| I am trying to execute a batch script on a remote computer.
| 
| The batch script looks like:
| 
| @echo off
| start c:\python24\python.exe c:\a_script.py
| 
| 
| Here's the setup:
| Computer A (my computer), Computer B (the remote computer).
| 
| So I map "W:" to Computer B and then copy the batch script to Computer
| B.  Then from within Python on Computer A I run:
| import subprocess
| subprocess.Popen("W:\\foo.bat")
| 
| However, when it runs it says it can't find c:\a_script.py.  It seems
| to be trying to look
| at Computer A, not Computer B.  How can I do this?

You're confusing a couple of things here. One is a 
drive mapping, which presents the *filesystem* of a
remote computer as though it were local. The other
is a remote procedure call, which presents the
*processor* (and environment etc.) of a remote 
computer as though it were local.

What you're doing has the effect of running a
remote *file* on a local *processor*.

You could run a remote script -- on the *remote*
processor -- under vanilla Windows using WMI, and
possibly using some other DCOM-based technology, such
as WSH. But you'd run into some security / environment
issues depending on just what your remote script was
trying to do.

You could also -- if you were prepared to invest in
some more software infrastructure -- employ Pyro
(http://pyro.sf.net), Corba, XML-RPC or any one of
several other RPC-type technologies.

Are you even more confused now than you were when
I started? ;)

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
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From albalmer at att.net  Wed Feb 15 14:20:45 2006
From: albalmer at att.net (Al Balmer)
Date: Wed, 15 Feb 2006 14:20:45 -0500
Subject: Xah's Edu Corner: accountability & lying thru the teeth
References: <1134780763.066592.45390@g49g2000cwa.googlegroups.com>
	<1135405908.381150.133190@o13g2000cwo.googlegroups.com>
	<1136236586.734775.212440@f14g2000cwb.googlegroups.com>
	<1137784561.589887.58380@o13g2000cwo.googlegroups.com>
	<1139909629.798938.284160@g47g2000cwa.googlegroups.com>
	<45dmspF66tepU1@individual.net>
	<r9uIf.8084$lG2.2039@news-wrt-01.rdc-nyc.rr.com>
	<n5t4v1tme5eaa5jmhfpqusd85ajfpliunh@4ax.com>
	<9vyIf.8103$lG2.7704@news-wrt-01.rdc-nyc.rr.com>
Message-ID: <2dv6v1hv6914bbfc4a508pkbjf8d2csgkg@4ax.com>

On Wed, 15 Feb 2006 04:55:33 GMT, Kenny Tilton
<NOktiltonSPAM at nyc.rr.com> wrote:

>> Apparently you've never actually read one of his articles.
>
>Have you read his web page? Like I did? Get back to me after you come up 
>to speed on Xah.

Given the aspect he presents on Usenet, why on earth would I want to
go to his web page?

Why should I want to "come up to speed" on him? I have him filtered,
have for a long time, and I can understand that it would be better if
everyone filtered or ignored him, but I don't see posted complaints
about him being any worse than your complaints about the complainers.
I have no idea why anyone would defend such inane, worthless,
obscenity-laced articles.

-- 
Al Balmer
Sun City, AZ


From nicola.musatti at gmail.com  Mon Feb  6 11:51:56 2006
From: nicola.musatti at gmail.com (Nicola Musatti)
Date: 6 Feb 2006 08:51:56 -0800
Subject: OO conventions
In-Reply-To: <mailman.1476.1139222219.27775.python-list@python.org>
References: <mailman.1334.1138833641.27775.python-list@python.org>
	<1139221726.376326.73560@g44g2000cwa.googlegroups.com>
	<mailman.1476.1139222219.27775.python-list@python.org>
Message-ID: <1139244716.125636.237630@z14g2000cwz.googlegroups.com>


Fredrik Lundh wrote:
> Nicola Musatti wrote:
[...]
> > What is important to me is to keep your get_initial_data() function
> > outside Klass if it's task is non trivial, e.g. it has to interact with
> > the OS or a DB.
>
> why ?

Separating the internal logic of an application from its interactions
with the outside world, e.g. retrieval from a file or a database and
presentation to a GUI, makes it easier to reuse the logic in different
contexts and may help make it possible to use highly generic solutions
for those interactions. I'm thinking of code generation or
introspection, which may be applied with very limited knowledge of the
application logic.

In larger projects I find that this separation tends to match the
different areas of expertise that are needed: database experts, GUI
experts, domain experts, etc.

Cheers,
Nicola Musatti



From juho.schultz at helsinki.fi  Fri Feb  3 11:48:54 2006
From: juho.schultz at helsinki.fi (Juho Schultz)
Date: Fri, 03 Feb 2006 18:48:54 +0200
Subject: problems writing tuple to log file
In-Reply-To: <1138980476.469673.254090@g44g2000cwa.googlegroups.com>
References: <1138980476.469673.254090@g44g2000cwa.googlegroups.com>
Message-ID: <ds01hm$a54$1@oravannahka.helsinki.fi>

localpricemaps at gmail.com wrote:
> i am having a problem writing a tuple to a text file.  my code is
> below.
> 
> what i end up getting is a text file that looks like this
> 
> burger, 7up
> burger, 7up
> burger, 7up
> 
> and this is instead of getting a list that should look like this
> 
> burger, 7up
> fries ,coke
> cake ,milk
> 
> note that i have print statements that print out the results of the
> scraping and they are fine.  they print out burger, fries, cake and
> then 7up, coke, milk
> 
> however there is something faulty in my writing of the tuple to the
> text file.  perhaps related to the indentation that causes it to write
> the same stuff over and over?
> 
> 
> 
>     for row in bs('div'):

What kind of function is 'bs'? Should you use 'row'
(which you are looping over) inside the loop?
Seems that your code is equal to

for row in range(len(bs('div'))):

> 	for incident in bs('span'):

Just like you use 'incident' here, inside the other loop.


>         	foodlist = []
> 		b = incident.findPrevious('b')
> 		for oText in b.fetchText( oRE):
>             		#foodlist.append(oText.strip() + "',")
> 				foodlist += oText.strip() + "','"
> 		food = ''.join(foodlist)
> 		print food
> 

After "print food" you repeat the loop, overwriting "food" until last 
round. And after you have found the last "food", you put it in "tuple".

>         tuple = (food + drink "\n")

A tip: 'tuple' is a built-in function, just like 'open' you use.
This statement overwrites that function with a string.
It is usually a good idea to leave the built-ins as they are,
and use some other names for variables.


From bonono at gmail.com  Fri Feb 17 14:46:36 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 17 Feb 2006 11:46:36 -0800
Subject: Print a PDF transparently
In-Reply-To: <1140202841.650774.32920@z14g2000cwz.googlegroups.com>
References: <1140184955.674138.275010@o13g2000cwo.googlegroups.com>
	<11vbpu58sll1b4f@corp.supernews.com>
	<1140190758.951694.231890@f14g2000cwb.googlegroups.com>
	<fk0cv159vg81i62524nvpuueg8q7iorcnk@4ax.com>
	<1140202841.650774.32920@z14g2000cwz.googlegroups.com>
Message-ID: <1140205596.648065.237670@f14g2000cwb.googlegroups.com>


Daniel Crespo wrote:
> Yes, I've seen it, but that's it: another program that I have to
> install, which I want to avoid.
>
> I'd be happy if I just do "printer.Print(file.pdf/.ps)" and wal?, the
> printing just starts (in 98,2000,XP... sounds like a dream), without
> having another window opened. If it opens, but then closes, it's
> perfect too.
I have done such thing a few years back, just use the file association
and the "print/printto" action. All you need is to have Acrobat
installed. You can try it by right click on the desktop on a .PDF file
and select print. A modeless dialog would still be visible but would
close itself. This was using ancient Acrobat Reader.

You need to read the WIN32 API(I faintly remembered about Shell
something) that tells you how to do it programmatically(I used C).

>
> All this has to be easilly installed (with InnoSetup, for example),
> because I have to install it on 70 offices. So I can't leave it to
> another installation process. All of these offices have a dot matrix
> printers Epson LX-300, which has PostScript level 3 built-in.
>
> Where can I find how to send a .ps directly to the printer?
Again, in the WIN32 API and unfortunately 98 and NT family has
completely different mechanism.



From mrstephengross at hotmail.com  Wed Feb 15 12:07:12 2006
From: mrstephengross at hotmail.com (mrstephengross)
Date: 15 Feb 2006 09:07:12 -0800
Subject: Embedding a binary file in a python script
References: <1140021879.698353.324230@o13g2000cwo.googlegroups.com>
	<mailman.1961.1140022989.27775.python-list@python.org>
Message-ID: <1140023232.099718.264330@g14g2000cwa.googlegroups.com>

Ok, this looks really cool, but can you explain a little more
step-by-step what's going on? In the end, I need to have a single
python script that (1) contains the archive and (2) can extract that
archive. The example you've given is interesting, but it's not clear to
me how to create the actual python script to do it all.

Thanks again,
--Steve (mrstephengross at hotmail.com)



From MrJean1 at gmail.com  Fri Feb  3 20:04:04 2006
From: MrJean1 at gmail.com (MrJean1)
Date: 3 Feb 2006 17:04:04 -0800
Subject: Best way to determine if a certain PID is still running
In-Reply-To: <mailman.1378.1138960840.27775.python-list@python.org>
References: <43E2AD80.2000100@ilm.com>
	<mailman.1378.1138960840.27775.python-list@python.org>
Message-ID: <1139015043.970666.210320@g44g2000cwa.googlegroups.com>

Take look at the poll() methods in the subprocess.py source file of
your Python install.

It shows how to use the os.wait_pid(pid, os.WNOHANG) to check whether a
process is still running or has terminated (and how, from the returned
status value).

Btw, on *nix you must call os.wait_pid(pid, ...) to avoid creating
zombie processes.

Using the subprocess module hides and handles all those details for
you, both on *nix and Windows.

/Jean Brouwers



From jeff at schwabcenter.com  Fri Feb 24 07:50:18 2006
From: jeff at schwabcenter.com (Jeffrey Schwab)
Date: Fri, 24 Feb 2006 12:50:18 GMT
Subject: "Temporary" Variable
In-Reply-To: <pan.2006.02.24.09.42.22.818116@REMOVETHIScyber.com.au>
References: <1140665472.203495.7570@g44g2000cwa.googlegroups.com>
	<43FD6645.3020201@REMOVEMEcyber.com.au>
	<1140725159.143882.202630@j33g2000cwa.googlegroups.com>
	<pan.2006.02.23.22.19.38.642977@REMOVETHIScyber.com.au>
	<ZmsLf.21067$915.1256@southeast.rr.com>
	<pan.2006.02.24.09.42.22.818116@REMOVETHIScyber.com.au>
Message-ID: <eiDLf.21220$915.2746@southeast.rr.com>

Steven D'Aprano wrote:
> On Fri, 24 Feb 2006 00:24:25 +0000, Jeffrey Schwab wrote:
> 
> 
>>Steven D'Aprano wrote:
>>
>>>On Thu, 23 Feb 2006 12:05:59 -0800, darthbob88 wrote:
>>>
>>>My comments inserted inline.
>>>
>>>
>>>
>>>
>>>>#!/usr/bin/python
>>>>#simple guessing game, with numbers
>>>>import random
>>>>spam = random.randint(1, 100)
>>>
>>>
>>>It is bad programming practice to give variables uninformative joke names.
>>
>>Lighten up.  This isn't the middle of a 100-KLOC corporate monstrosity, 
>>it's a 1/2-page usenet post.
> 
> 
> The original poster is also a newbie who was having trouble with the
> difference between strings and ints. If Guido called a variable spam,
> I wouldn't presume to correct him. When Newbie McNew does it, it might
> very well be because he doesn't know any better.

Sorry if I snapped at you.  But you didn't "correct" him, as he what he 
did wasn't wrong.  You just talked down to him.

> Just out of curiosity, when do you think is the right time to begin
> teaching programmers good practice from bad? Before or after they've
> learnt bad habits?

I'm not convinced the OP has a "bad habit."  Frankly, I prefer postings 
that have a sense of humor.  I wouldn't want to see this turned into a 
purely techical forum.

import random
print ", ".join(['spam' for i in range(random.randint(1, 9))] +
	['bacon', 'eggs', 'and']), 'spam'


From aleaxit at yahoo.com  Mon Feb 20 20:21:29 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 20 Feb 2006 17:21:29 -0800
Subject: 2.4.2 + Zone Alarm
References: <1140481575.506191.9980@g47g2000cwa.googlegroups.com>
Message-ID: <1hb2imh.39tehkqjz0nhN%aleaxit@yahoo.com>

DannyB <dbough77 at yahoo.com> wrote:
   ...
> IIs there a fix?  I'm pretty sure that this problem started with 2.3.1
> (i'm suing 2.4.2).

Well, good look in court, then...!-)

Seriously, looks like we've omitted a SO_REUSEADDR somewhere in the IDLE
startup code, so that abrupt termination of an IDLE socket keeps the
socket non-reusable for a while; if so, then ZoneAlarm seems innocent
for once (try disconnecting your computer from the net, terminate
ZoneAlarm, and see if you can reproduce the bug).

I can't look into it right now, but if you open a bug on the Python bug
tracker (http://sourceforge.net/bugs/?group_id=5470) somebody will (look
into it, for sure, and hopefully fix it in time for 2.4.3).


Thanks,

Alex


From k.suess at gmx.net  Wed Feb 22 15:37:50 2006
From: k.suess at gmx.net (Katja Suess)
Date: Wed, 22 Feb 2006 21:37:50 +0100
Subject: PyUNO with different Python
In-Reply-To: <43fcad29$0$29099$5fc30a8@news.tiscali.it>
References: <mailman.2306.1140622912.27775.python-list@python.org>
	<43fcad29$0$29099$5fc30a8@news.tiscali.it>
Message-ID: <43FCCB9E.6080308@gmx.net>

Michele Petrazzo schrieb:
> ? wrote:
> 
>>Hi! maybe somebody can give me an hint to my problem setting up PyUNO
>>on my Mac to work with my Python not the Python delivered with
>>OpenOffice. As said in installation instructions I've set 
>>OPENOFFICE_PATH="/usr/lib/openoffice/program" export
>>PYTHONPATH="$OPENOFFICE_PATH" export
>>LD_LIBRARY_PATH="$OPENOFFICE_PATH" according to my environment.
>>
>>importing uno gives me this error:
>>
>>
>>>>>import uno
>>
>>Traceback (most recent call last): File "<stdin>", line 1, in ? File
>>"/Applications/OpenOffice.org 
>>2.0.app/Contents/openoffice.org2.0/program/uno.py", line 37, in ? 
>>import pyuno ImportError: No module named pyuno
>>
>>which means python finds uno but not pyuno (pyuno.dylib).
>>
> 
> 
> Do you want to use system python inside OOo (inside a macro, or...), or
> system python outside OOo?
> 
> For the first, follow this:
> http://udk.openoffice.org/python/python-bridge.html#replacing
> 
> for the second:
> http://udk.openoffice.org/python/python-bridge.html#modes
> 
> 
>>Any hints? Regards, Katja
> 
> 
> Michele

Thanks. What I have in mind is to write a Python script to generate PDFs from a set of ODTs.
This script has to run in Zope which brings its own Python. 
My problem is the setup of PyUNO with this Python which is not the OO included one.
Hope to find a Mac user who made/solved similar experience...
Regards, Katja


From gene.tani at gmail.com  Tue Feb 21 14:12:34 2006
From: gene.tani at gmail.com (gene tani)
Date: 21 Feb 2006 11:12:34 -0800
Subject: Augmented assignment
In-Reply-To: <mailman.2258.1140548256.27775.python-list@python.org>
References: <dte88n$568$2@home.itg.ti.com>
	<mailman.2258.1140548256.27775.python-list@python.org>
Message-ID: <1140549154.069649.143160@f14g2000cwb.googlegroups.com>


Terry Hancock wrote:
> On Tue, 21 Feb 2006 10:55:42 +0530
> Suresh Jeevanandam <jm.suresh at gmail.com> wrote:

> Seriously,
> I think they are usually equivalent internally,
> at least for immutable objects.
>

yah, but when you do augmented assigns on lists, or mix immutable an
dmutable:

http://zephyrfalcon.org/labs/python_pitfalls.html



From jstroud at ucla.edu  Wed Feb 22 22:00:07 2006
From: jstroud at ucla.edu (James Stroud)
Date: Wed, 22 Feb 2006 19:00:07 -0800
Subject: "configuring" a class
In-Reply-To: <1140658115.672421.207560@g47g2000cwa.googlegroups.com>
References: <1140658115.672421.207560@g47g2000cwa.googlegroups.com>
Message-ID: <dtj8fn$m5q$1@daisy.noc.ucla.edu>

Russ wrote:
> I would like to let the user of one of my classes "configure" it by
> activating or de-activating a particular behavior (for all instances of
> the class).
> 
> One way to do this, I figured, is to have a static class variable,
> along with a method to set the variable. However, I am stumped as to
> how to do that in python. Suggestions welcome.
> 
> The next best thing, I figure, is to just use a global variable.
> Several "methods" of the class then check the value of the global
> variable to determine what to do. The user can then just set the
> variable to get the desired behavior.
> 
> However, I tried this and it does not seem to work. I imported the
> class, then set the global variable. But the new value of the variable
> somehow did not get back into the class methods that need to see it.
> 
> Can anyone give me a clue about this? If there is a better way, please
> let me know. Thanks.
> 

py> class C:
...   doit = 2
...
py> C.doit
2
py> a = C()
py> b = C()
py> c = C()
py> a.doit, b.doit, c.doit
(2, 2, 2)
py> C.doit = 5
py> a.doit, b.doit, c.doit
(5, 5, 5)
py> b.doit = 13
py> a.doit, b.doit, c.doit
(5, 13, 5)

James


From evan.monroig at gmail.com  Mon Feb 13 22:06:40 2006
From: evan.monroig at gmail.com (Evan Monroig)
Date: Tue, 14 Feb 2006 12:06:40 +0900
Subject: listing attributes
In-Reply-To: <1139884643.749492.221140@g43g2000cwa.googlegroups.com>
References: <1139884643.749492.221140@g43g2000cwa.googlegroups.com>
Message-ID: <20060214030640.GA11979@localhost.localdomain>

On Feb.13 18h37, Thomas Girod wrote :
> Hi there.
> 
> I'm trying to get a list of attributes from a class. The dir() function
> seems to be convenient, but unfortunately it lists to much - i don't
> need the methods, neither the built-in variables.

If you do something like this you should have a list of attributes:

l = dir(object)
l = [s for s in l if s[:2] != '__']
l = [s for s in l if not callable(getattr(object, s))]

cheers,

Evan


From onurb at xiludom.gro  Wed Feb 15 09:07:41 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Wed, 15 Feb 2006 15:07:41 +0100
Subject: Code organization
In-Reply-To: <1140010547.891395.65510@g44g2000cwa.googlegroups.com>
References: <1140010547.891395.65510@g44g2000cwa.googlegroups.com>
Message-ID: <43f335ca$0$1397$626a54ce@news.free.fr>

Thomas Girod wrote:
> Hi.
> 
> I found a lot of documentation about how to code in Python, but not
> much about how you organize your code in various modules / packages ...
> As I am not yet used to python, this puzzle me a bit.
> 
> So, can anyone explain how one should organize and store its code ? the
> uses of __init__.py files ? Maybe my question is not very clear, but I
> hope someone will understand anyway ...

Well... As a starting point relative to Python specific stuff (use of
__init__.py etc), the Fine Manual is your friend:
http://www.python.org/doc/2.4.2/tut/node8.html

Now for best practices and whatnots, this isn't really specific to
Python. Try to have modules with high cohesion and low coupling, and
it'll be fine. Eventually try to provide a facade class or function for
complex packages (this is a current pattern in the standard lib).

Also, python-is-not-java, so don't feel commited to putting everything
in classes when plain functions would do, and avoid the 1:1 class/file
Java plague !-)

My 2 cents...
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From john_zenger at yahoo.com  Tue Feb 21 21:06:54 2006
From: john_zenger at yahoo.com (John Zenger)
Date: Tue, 21 Feb 2006 21:06:54 -0500
Subject: Basic coin flipper program - logical error help
In-Reply-To: <UoOKf.49379$id5.43228@bgtnsc04-news.ops.worldnet.att.net>
References: <1140567243.251982.255620@g14g2000cwa.googlegroups.com>
	<UoOKf.49379$id5.43228@bgtnsc04-news.ops.worldnet.att.net>
Message-ID: <oOadnVkfiM7aWmbeRVn-vw@comcast.com>

wes weston wrote:
>    Looping is easier with:
> for x in range(100):
>    if random.randint(0,1) == 0:
>       heads += 1
>    else:
>       tails += 1

Also, with the functional programming tools of map, filter, and lambda, 
this code can be reduced to just six lines:

import random

flips = map(lambda x: random.randrange(2), xrange(100))
heads = len(filter(lambda x: x is 0, flips))
tails = len(filter(lambda x: x is not 0, flips))

print "The coin landed on heads", heads, "times."
print "The coin landed on tails", tails, "times."


From siona at chiark.greenend.org.uk  Thu Feb  9 07:59:19 2006
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 09 Feb 2006 12:59:19 +0000 (GMT)
Subject: how to remove <BR> using replace function?
References: <1139462640.951603.302830@g44g2000cwa.googlegroups.com>
	<1139469846.713121.219060@g47g2000cwa.googlegroups.com>
	<1139472365.378523.141150@g44g2000cwa.googlegroups.com>
	<Xns9765591BFA42Cduncanbooth@127.0.0.1>
Message-ID: <FYC*P8S+q@news.chiark.greenend.org.uk>

Duncan Booth  <duncan.booth at suttoncourtenay.org.uk> wrote:
>Although I generally advise against overuse of regular expressions, this is 
>one situation where regular expressions might be useful: [ ... ]
>>>> nobr = re.compile('\W*<br.*?>\W*', re.I)

Agreed (on both counts), but r'\s*<br.*?>\s*' might be better
(consider what happens with "an unfortunate... <br> in the middle"
if you use \W rather than \s).

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From maketo at ukato.freeshell.org  Thu Feb  2 13:42:38 2006
From: maketo at ukato.freeshell.org (Ognen Duzlevski)
Date: Thu, 2 Feb 2006 18:42:38 +0000 (UTC)
Subject: dynamic class instantiation
References: <drlrtb$91v$1@chessie.cirr.com> <43de9abc$1_2@newspeer2.tds.net>
	<drnjid$flc$2@chessie.cirr.com>
	<slrndu0d72.ltb.volker_grabsch@modi.mathematik.hu-berlin.de>
	<drr0na$rp0$1@chessie.cirr.com> <43e2494f$1_1@newspeer2.tds.net>
Message-ID: <drtjqu$bd8$4@chessie.cirr.com>

Kent Johnson <kent at kentsjohnson.com> wrote:
> Ognen Duzlevski wrote:
> > Can you suggest a better approach or did you already do that and I just missed 
> > it? :)

> With the above definitions, an equivalent class is created by calling
> page = classFactory( 'page', { 'name' : None, 'caption': None, 
> 'functions' : []} )

Beautiful. Thank you very much.

Cheers,
Ognen


From sybrenUSE at YOURthirdtower.com.imagination  Tue Feb 14 12:29:17 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Tue, 14 Feb 2006 18:29:17 +0100
Subject: Python / Apache / MySQL
References: <1139907519.427789.188760@g14g2000cwa.googlegroups.com>
	<slrndv38ti.7rh.sybrenUSE@schuimige.unrealtower.org>
	<0001HW.C01764D700060858F0407550@news.individual.de>
	<43f1aebb$0$1728$636a55ce@news.free.fr>
	<0001HW.C01772E1000952B1F0407550@news.individual.de>
	<slrndv3ed3.9cm.sybrenUSE@schuimige.unrealtower.org>
	<86v3v1pvoi514avlbio77t238rpud4ppdi@4ax.com>
Message-ID: <slrndv44rd.bg6.sybrenUSE@schuimige.unrealtower.org>

Dennis Lee Bieber enlightened us with:
> I believe that since 4.1, the "default table format" is InnoDB, and
> that DOES have some support foreign keys and transactions.

Finally they are starting to make more sense. I'd still rather use a
database that has had those features for a longer time, though.

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From lycka at carmen.se  Fri Feb 17 10:20:07 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 17 Feb 2006 16:20:07 +0100
Subject: Python 3000 deat !? Is true division ever coming ?
In-Reply-To: <1139810036.943598.229030@g47g2000cwa.googlegroups.com>
References: <1139810036.943598.229030@g47g2000cwa.googlegroups.com>
Message-ID: <dt4pj8$o21$1@wake.carmen.se>

seb.haase at gmail.com wrote:
> Hi,
> Is it true that that "Python 3000" is dead ?

I think you should view Python 3000 as a metaphor for
"Python as it would look if we didn't have to care about
backward compatibility".

Before this name appeared, Guido used to talk about
Python 3.0 as a version where bad things in Python could
go away, but it seems many people got worried about that,
assuming that Python 3.0 would happen soon and cause a lot
of changes in already written code. Thus the less scary
label Python 3000. There has never been any concrete plans
as far as I know to actually release a real software product
called Python 3000. It's rather a long term design target
for Python.

A lot of these language changes can be introduced step
be step. A new feature can be introduced first as an
experimental feature, accessible via "from __future__
import XYZ", in the next minor release, it might be
enabled by default. If a feature or module is going away,
the first step is to document it as deprecated. The next
minor release will issue a PendingDeprecationWarning, and
the minor release after that will issue a DeprecationWarning
and the next minor release (2.4 -> 2.5 etc) will remove
the feature. This will give developers a period of many
years to adapt from the time the feature is documented as
deprecated until maintenace ends for the last Python where
the deprecated feature works.

For an example of such a transition plan, see
http://www.python.org/peps/pep-0352.html

Changing the behaviour of int/int is worse, since there
is no obvious way for Python to determine whether the
programmer expects an int result, a float result or either.
Also, the typical consequence of this change is not that
code breaks with a big bang, but rather that it produces
somewhat different results. That means that a bug due to
this feature change might go unnoticed for a long time,
and cause a lot of problems. Imagine some kind of system
that calculates how much pension you'll get when you
retire, based on your monthly payments. A bug caused by
changed division behaviour might have serious consequences.

It seems reasonable to wait until the next major release,
3.0, before this feature is introduced. In the mean time
it seems that the strategy should be to encourage people
to adopt the new behaviour in all new code, i.e. to use
"from __future__ import division" and to explicitly use
interger division a//b when this is needed.

In the same way, people should be encouraged to always
use new style classes, "class X(object):" in new code,
since old style classes are going away, and they behave
differently in some ways.

A problem as I see it today, is that this behaviour is
not actively encouraged. The tutorial, which is maintained
and updated, still describes old style classes, and the
old division behaviour.

http://docs.python.org/dev/tut/node5.html#SECTION005110000000000000000
http://docs.python.org/dev/tut/node11.html#SECTION0011300000000000000000

I don't see any reason to use old style classes in new code,
so I think all "class X:" should be changed to
"class X(object):", but I can understand that it would be
confusing to explain the use of "from __future__ import division"
before we introduce simple arithmetics. Still, we should
get this message through!

As it is now, when people aren't actively moving their code
towards this expected change, the impact of such a change
would be almost as strong as if this "from __future_..."
feature didn't exist.

So, if I finally try to answer your question: Float division
will hardly be enabled by default until most Python programmers
have adopted the feature, i.e. enabled it through the
__future__ switch and started to use // when they want floor
division.

This will hardly happen until it's documented as the way people
should do it. Perhaps a start could be a FutureProofPython page
in the Python wiki, with suggested coding guidelines.


From fredrik at pythonware.com  Mon Feb 20 06:55:39 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 20 Feb 2006 12:55:39 +0100
Subject: cElementTree encoding woes
References: <45tkj3F8d9fpU1@uni-berlin.de>
Message-ID: <dtcans$7gc$1@sea.gmane.org>

Diez B. Roggisch wrote:

> I've got to deal with a pretty huge XML-document, and to do so I use the
> cElementTree.iterparse functionality. Working great.
>
> Only trouble: The guys creating that chunk of XML - well, lets just say they
> are "encodingly challanged", so they don't produce utf-8, but only cp1252
> instead, together with some weird name (Windows-1252) for that. That is not
> part of the standard codecs module. cp1252 is, of course.
>
> But that won't work for iterparse. So currently, I manually change the
> encoding given to utf-8, and use a stream-recoder.
>
> However, I was wondering if I could teach cElementTree about that encoding
> name. I tried to register cp1252 under the name Windows-1252, but had no
> luck - cET won't buy it.

you need cET 1.0.5 or later for this to work.  for earlier versions, you have to use
stream recoding:

    http://effbot.org/zone/celementtree-encoding.htm

</F> 





From lycka at carmen.se  Mon Feb 27 11:33:14 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Mon, 27 Feb 2006 17:33:14 +0100
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <mailman.2397.1140790626.27775.python-list@python.org>
References: <dtl9ad$35h$1@sea.gmane.org>	<dtlat7$80c$1@sea.gmane.org>	<mailman.2376.1140733288.27775.python-list@python.org>	<dtmm8v$fid$1@wake.carmen.se>
	<mailman.2397.1140790626.27775.python-list@python.org>
Message-ID: <dtv9kb$mk$1@wake.carmen.se>

Peter Hansen wrote:
> Magnus Lycka wrote:
> 
>> With an operating system such as Windows, this is
>> probably something you can expect to happen, although
>> I'm surprised if such long lag times as 200 s are typical.
> 
> No way.  I mean, I'm the biggest critic of Windows operating systems 
> when used in realtime environments (at least with my customers), but 
> there's no way you should "probably expect a 200s delay to happen".

You know Peter, quotations are typically used when you actually
quote someone, not when you make your own interpretation of what
they meant.

If I write that it would surprise me if you are often hit by
meteorites, would the quote then be "you'll probably get hit
by meteorites"?


From ilias at lazaridis.com  Wed Feb 22 08:43:07 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Wed, 22 Feb 2006 15:43:07 +0200
Subject: Komodo - Will it Lock Me In?
In-Reply-To: <yEncExpress_Rulz!_www.techsono.com_3223072898@firstva.com>
References: <yEncExpress_Rulz!_www.techsono.com_3223072898@firstva.com>
Message-ID: <dthpp9$j8m$1@usenet.otenet.gr>

Matt Trivisonno wrote:
> Hi Everybody,
> 
> If I were to use Komodo to write in Python, would it add a lot of goo to my 
> code such that I would not be able to switch to another IDE without having to 
> claw my way out of a tarpit first?
> 
> Any other thoughts on Komodo? I am considering it because I am hoping to find 
> a solution to the install-packages-until-you-go-blind aspect of Python. 
> Setting up a serious, cross-platform, gui development environment is quite a 
> struggle for a newbie.

I work myself currently with the Kommodo IDE (but have not done an 
thorough evaluation of the market before choosing it).

The "lock-in" question would be solved, if Active State would go 
open-source with Kommodo.

Even a partial open-source would solve this: If the project-management 
subsystems would go open-source, other IDE's could adopt them, ensuring 
a cohesive standard across the dynamic communities.

-

I have made a compact review of Active State, which will possibly give 
you some relevant information:

http://lazaridis.com/samples/com/ActiveState/index.html

Note that some things have changed since the review, which could 
simplify the process of going open source even more:

"Active State, a Division of Sophos" has become

"ActiveState Software Inc."

http://activestate.com/Corporate/Communications/Releases/Press1140209595.html

.

-- 
http://lazaridis.com


From john_sips_teaz at yahooz.com  Thu Feb 23 02:14:57 2006
From: john_sips_teaz at yahooz.com (John M. Gabriele)
Date: Thu, 23 Feb 2006 02:14:57 -0500
Subject: pyFltk-1.1
In-Reply-To: <mailman.2322.1140651210.27775.python-list@python.org>
References: <1140617661.603681.12250@z14g2000cwz.googlegroups.com>
	<mailman.2322.1140651210.27775.python-list@python.org>
Message-ID: <fldLf.428$qX4.385@fe10.lga>

{fixed top-posting}

george williams wrote:

 > > This is to announce the first official release of pyFltk-1.1,
 > > the Python bindings for the cross platform GUI toolkit fltk-1.1
 >
> By god this sounds interesting I wish I 
> knew what you are talking about

fltk (pronounced "full-tick" as in "Cap'n, we're doing warp 9
and the engines are going full tick!" but not as in, "boy,
I just checked the dog found one very full tick") is a C++
GUI toolkit. You would use fltk for writing a GUI desktop
application. It's like GTK+ or Qt, but much smaller and lighter.

pyFltk is a Python binding to fltk. That is, so you can use
fltk from Python instead of from C++.

---J

-- 
(remove zeez if demunging email address)


From email at christoph-haas.de  Mon Feb 20 11:48:25 2006
From: email at christoph-haas.de (Christoph Haas)
Date: Mon, 20 Feb 2006 17:48:25 +0100
Subject: preserving POST data
In-Reply-To: <20060216213531.57457.qmail@web36502.mail.mud.yahoo.com>
References: <20060216213531.57457.qmail@web36502.mail.mud.yahoo.com>
Message-ID: <200602201748.26083.email@christoph-haas.de>

On Thursday 16 February 2006 22:35, Steve Young wrote:
> Lets say that I'm filling out a form and the information gets sent to 
> another server first for some processing(before the one that it 
> "should" go to). But from there, I want that intermediate server to be 
> able to preserve this POST data using python so it can still retrieve 
> the page that was originally requested (with some modifications from 
> the intermediate server). Is there a way to do this with python?

That's less a python-specific question. The general solution is to store 
the information on your server and remember who the user was. Many web 
programmers use a cookie based authentication/identification with a 
database backend. Which means:

- User comes to your website
- You send the user a cookie
- You create an entry in your database with that cookie
- User enters data
- You add the data to the database (referring to the cookie)
- User comes back later
- You can look up the data in your database according to the user's cookie

I use that scheme in a more complex way for cookie based authentication 
(http://workaround.org/pysessions).

Kindly
 Christoph
-- 
~
~
".signature" [Modified] 1 line --100%--                1,48         All


From jrivero at latinux.org  Mon Feb 20 21:43:44 2006
From: jrivero at latinux.org (Jesus Rivero - (Neurogeek))
Date: Mon, 20 Feb 2006 22:43:44 -0400
Subject: html parser , unexpected '<' char in declaration
In-Reply-To: <1140488536.933840.65530@o13g2000cwo.googlegroups.com>
References: <1140473997.262973.149260@f14g2000cwb.googlegroups.com>	<mailman.2198.1140483714.27775.python-list@python.org>
	<1140488536.933840.65530@o13g2000cwo.googlegroups.com>
Message-ID: <43FA7E60.6060803@latinux.org>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

hmmm, that's kind of different issue then.

I can guess, from the error you pasted earlier, that the problem shown
is due to the fact Python is interpreting a "<" as an expression and not
as a char. review your code or try to figure out the exact input you're
receving within the mta.


Regards,

     Jesus (Neurogeek)

Sakcee wrote:

> thanks for the reply
> 
> well probabbly I should explain more.  this is part of an email . after
> the mta delivers the email, it is stored in a local dir.
> After that the email is being parsed by the parser inside an web based
> imap client at display time.
> 
> I dont think I have the choice of rewriting the message!? and I dont
> want to reject the message alltogether.
> 
> I can either 1-fix the incoming html by tidying it up
> or 2- strip only plain text out and dispaly that you have spam, 3 - or
> ignore that mal-formatted tag and display the rest
> 

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.1 (GNU/Linux)
Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org

iD8DBQFD+n5gdIssYB9vBoMRAvIHAJ9H+IQWtaEMa9FBYFvDAQXcIO2SRwCfX3yj
BEvNJ6yWht1b+dBc6ohkwYI=
=X1JL
-----END PGP SIGNATURE-----


From apardon at forel.vub.ac.be  Fri Feb 24 06:49:31 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 24 Feb 2006 11:49:31 GMT
Subject: A C-like if statement
References: <hp-dnY20cusOnGPeRVn-rg@nmt.edu> <dtl04p$5q2$1@reader2.panix.com>
Message-ID: <slrndvtsma.95h.apardon@rcpc42.vub.ac.be>

Op 2006-02-23, Roy Smith schreef <roy at panix.com>:
> Bob Greschke <bob at passcal.nmt.edu> wrote:
>>I miss being able to do something like this in Python
>>
>>1f (I = a.find("3")) != -1:
>>    print "It's here: ", I
>>else:
>>    print "No 3's here"
>>
>>where I gets assigned the index returned by find() AND the if statement gets 
>>to do its job in the same line.  Then you don't have to have another like 
>>that specifically gets the index of the "3".  Is there a way to do this in 
>>Python?
>
> It is a deliberate and fundamental design decision in Python that
> assignment is a statement, not an expression with side effects.

The only motivation I have heard for this decision is to easily
find typo related bugs. I can hardly find that a fundamental
design decision.

-- 
Antoon Pardon


From btaranto at gmail.com  Tue Feb  7 13:02:23 2006
From: btaranto at gmail.com (btaranto at gmail.com)
Date: 7 Feb 2006 10:02:23 -0800
Subject: python-ldap
In-Reply-To: <mailman.1559.1139333846.27775.python-list@python.org>
References: <1139330793.864675.302090@f14g2000cwb.googlegroups.com>
	<mailman.1559.1139333846.27775.python-list@python.org>
Message-ID: <1139335343.546105.237230@g14g2000cwa.googlegroups.com>

_)_



From dylan.moreland at gmail.com  Wed Feb 15 00:44:05 2006
From: dylan.moreland at gmail.com (Dylan Moreland)
Date: 14 Feb 2006 21:44:05 -0800
Subject: how to write a C-style for loop?
In-Reply-To: <gZednVPdAtumI2_eRVn-jw@rcn.net>
References: <gZednVPdAtumI2_eRVn-jw@rcn.net>
Message-ID: <1139982245.088453.241010@g14g2000cwa.googlegroups.com>


John Salerno wrote:
> I assume this is the way for loops are written in C, but if it helps to
> be specific, I'm referring to C# for loops. The Python for loop seems to
> be the same (or similar) to C#'s foreach loop:
>
> foreach int i in X
>
> But how would you write a C# for loop in Python? Do you rework a while
> loop, or use the range() function?
>
> Here's an example:
>
> for (int i = 0; i < 50; i += 5)
>
> How would that go in Python, in the simplest and most efficient way?
>
> Thanks.

Take a look at the range() builtin. That should give you what you need.



From http  Wed Feb  8 15:13:45 2006
From: http (Paul Rubin)
Date: 08 Feb 2006 12:13:45 -0800
Subject: Too Many if Statements?
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<dsaqkj$jhm$1@xenon.Stanford.EDU>
	<GU8Gf.22899$Jd.6095@newssvr25.news.prodigy.net>
	<dscc9e$4mg$1@oravannahka.helsinki.fi>
	<1139429094.744499.258170@o13g2000cwo.googlegroups.com>
Message-ID: <7xvevpr4li.fsf@ruckus.brouhaha.com>

"rainbow.cougar at gmail.com" <rainbow.cougar at gmail.com> writes:
> SystemError: com_backpatch: offset too large

Yeah, that sounds like there's some 16-bit fields in the bytecode format.


From deets at nospam.web.de  Thu Feb 23 12:17:18 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 23 Feb 2006 18:17:18 +0100
Subject: need help regarding compilation
References: <1140714583.014871.194640@p10g2000cwp.googlegroups.com>
Message-ID: <46694pF9ms9bU1@uni-berlin.de>

fidlee at gmail.com wrote:

> i am new to learning jython...
> 
> 
> i just tried compiling a small piece of code that is given below:
> 
> def fac(x)
>  if x<=1:return 1
>  return x*fac(x-1)

You really have a book about python that doesn't mention that functions
definitions are closed by a colon? I doubt that...

Try this:

def fac(x):
 if x<=1:return 1
 return x*fac(x-1)

regards,

Diez


From bearophileHUGS at lycos.com  Fri Feb 10 09:41:43 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 10 Feb 2006 06:41:43 -0800
Subject: Create dict from two lists
In-Reply-To: <1139581243.360298.164070@g43g2000cwa.googlegroups.com>
References: <1139579518.129742.265680@o13g2000cwo.googlegroups.com>
	<453k9eF444frU1@uni-berlin.de>
	<dsi70h$48e$1@aphrodite.grec.isp.9tel.net>
	<1139581243.360298.164070@g43g2000cwa.googlegroups.com>
Message-ID: <1139582503.478330.3670@z14g2000cwz.googlegroups.com>

py:
> Thanks, itertools.izip and just zip work great.  However, I should have
> mentioned this, is that I need to keep the new dictionary sorted.

A Python dictionary is an unsorted data structure, so you cannot have
it sorted as you please.
(I have seen that lot of people ask for a sorted dictionary and for
permutation/combination functions, maybe they are batteries to be
included too in the standard library.)
If you need an ordered dict you can manage it yourself, keeping the
lists of keys, etc, or you can use an ordered dict implementation:

http://www.voidspace.org.uk/python/odict.html
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/438823
Etc.

Bye,
bearophile



From andre.roberge at gmail.com  Wed Feb  1 09:35:33 2006
From: andre.roberge at gmail.com (=?iso-8859-1?B?QW5kcuk=?=)
Date: 1 Feb 2006 06:35:33 -0800
Subject: Rur-ple lessons 0.36
In-Reply-To: <43e0c0ce$0$20180$8fcfb975@news.wanadoo.fr>
References: <1138578056.564555.283470@o13g2000cwo.googlegroups.com>
	<43e0c0ce$0$20180$8fcfb975@news.wanadoo.fr>
Message-ID: <1138804533.269105.6740@f14g2000cwb.googlegroups.com>

Bonjour !

Je n'ai pas d'objections ? ce que tu le fasse.  La seule chose qui
m'emb?te, c'est que les le?ons ne sont qu'en anglais.  C'est un peu
pour moi une question de fiert? ; au moins l'interface de rur-ple est
traduite en fran?ais.

Andr? Roberge


M?ta-MCI wrote:
> Bonjour !
>
> Il me semblerait sympathique que cette annonce soit dupliqu?e sur
> fr.comp.lang.python, et sur quelques autres newsgroups.
> Par exemple, puis-je r?percuter l'annonce sur le newsgroup
> "programmation.python" de zoo-logique ?
> 
> @-salutations
> -- 
> Michel Claveau



From chrisperkins99 at gmail.com  Mon Feb 27 15:54:56 2006
From: chrisperkins99 at gmail.com (chrisperkins99 at gmail.com)
Date: 27 Feb 2006 12:54:56 -0800
Subject: str.count is slow
Message-ID: <1141073696.107136.318600@j33g2000cwa.googlegroups.com>

It seems to me that str.count is awfully slow.  Is there some reason
for this?
Evidence:

######## str.count time test ########
import string
import time
import array

s = string.printable * int(1e5) # 10**7 character string
a = array.array('c', s)
u = unicode(s)
RIGHT_ANSWER = s.count('a')

def main():
    print 'str:    ', time_call(s.count, 'a')
    print 'array:  ', time_call(a.count, 'a')
    print 'unicode:', time_call(u.count, 'a')

def time_call(f, *a):
    start = time.clock()
    assert RIGHT_ANSWER == f(*a)
    return time.clock()-start

if __name__ == '__main__':
    main()

###### end ########

On my machine, the output is:

str:     0.29365715475
array:   0.448095498171
unicode: 0.0243757237303

If a unicode object can count characters so fast, why should an str
object be ten times slower?  Just curious, really - it's still fast
enough for me (so far).

This is with Python 2.4.1 on WinXP.


Chris Perkins



From mensanator at aol.com  Thu Feb  9 20:36:06 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 9 Feb 2006 17:36:06 -0800
Subject: Pulling all n-sized combinations from a list
In-Reply-To: <mailman.1694.1139533045.27775.python-list@python.org>
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>
	<mailman.1668.1139501162.27775.python-list@python.org>
	<1139509392.890581.94470@g43g2000cwa.googlegroups.com>
	<mailman.1676.1139512284.27775.python-list@python.org>
	<1139527518.210792.3420@g14g2000cwa.googlegroups.com>
	<mailman.1694.1139533045.27775.python-list@python.org>
Message-ID: <1139535366.809771.241020@z14g2000cwz.googlegroups.com>


Jack Diederich wrote:
> liberally snipped out parts
> On Thu, Feb 09, 2006 at 03:25:18PM -0800, mensanator at aol.com wrote:
> > Jack Diederich wrote:
> > > > > On Wed, Feb 08, 2006 at 12:50:19PM -0800, Swroteb wrote:
> > > > > >
> > > > > > I've got a reasonably sized list of objects that I'd like to pull out
> > > > > > all combinations of five elements from.  Right now I have a way to do
> > > > > > this that's quite slow, but manageable.  I know there must be a better
> > > > > > way to do this, but I'm not sure what it is.  Here's what I've got so
> > > > > > far:
> > > > >
> > > > > import probstat # http://probstat.sourceforge.net
> > > > > for (a, b, c) in probstat.Combination(range(9), 3): # 0..9, pick 3
> > > > >   print a, b, c
> > > > >
> >
> > so I put together a little test program to see how probstat
> > compares. Correspondence to my emulations is (as far as I can tell)
> >
> >
> > def p_perm(a,n):
> >         A = list(a)
> >         t0 = time.time()
> >         if len(A)<n:
> >             c = probstat.Permutation(A,n)
> >         else:
> >             c = probstat.Permutation(A)
> >         print time.time()-t0
> >         p = []
> >         for i in c:
> >             p.append(''.join(i))
> >         return p
>
> This never calls the A choose n branch because len(A) is always
> bigger than n.

Duh <slaps forehead>. It was supposed to be

if n<len(A):

That explains why it worked from the Idle prompt. I thought the
functions was executing c = probstat.Permutation(A,n), so that's
what I typed at the prompt.

>
> > print 'permutation w/o replacemment "abcdefghijklmnopqrstuvwxyz":4'
> > t0 = time.time()
> > p = p_perm("abcdefghijklmnopqrstuvwxyz", 4)
> > t1 = time.time()
> > print len(p),'4-letter words',t1-t0,'seconds'
> >
> > Unfortunately, the long test died (out of virtual memory) executing
> > the probstat.Permution test.
> >
>
> >>> import probstat
> >>> p = probstat.Permutation(range(25))
> >>> len(p)
> 2076180480
> >>> p = probstat.Permutation(range(26))
> >>> len(p)
> -1853882368
> >>>
>
> Overflow error.  I'll have to add a test that raises a ValueError
> for lists that are too big.
>
> The following simple loop takes three minutes to run on my laptop
> import probstat
> count_to = len(probstat(range(12))) # just computes the size
> cnt = 0
> while cnt < count_to:
>   cnt += 1
>
> So a permutation of all arrangements of the alphabet would take
> rougly forever.

Right, I never intended to do that, was trying to make 4-letter words,
not 26 letter permutations.

Anyway, now that _my_ bug is fixed, it works properly:

permutation w/  replacemment "abcdefghijklmnopqrstuvwxyz":4
456976 4-letter words 1.26600003242 seconds
combination w/  replacemment "abcdefghijklmnopqrstuvwxyz":4
23751 4-letter words 0.671999931335 seconds
permutation w/o replacemment "abcdefghijklmnopqrstuvwxyz":4
358800 4-letter words 1.6400001049 seconds
combination w/o replacemment "abcdefghijklmnopqrstuvwxyz":4
14950 4-letter words 0.56200003624 seconds

probstat.Cartesian "abcdefghijklmnopqrstuvwxyz":4
456976 4-letter words 1.42199993134 seconds
probstat.Permutation "abcdefghijklmnopqrstuvwxyz":4
358800 4-letter words 1.06200003624 seconds
probstat.Combination "abcdefghijklmnopqrstuvwxyz":4
14950 4-letter words 0.077999830246 seconds

Thanks again for supplying that pyd.

> 
> -Jack



From fakeaddress at nowhere.org  Wed Feb 15 18:48:53 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Wed, 15 Feb 2006 23:48:53 GMT
Subject: is socket thread safe?
In-Reply-To: <1139912679.559724.131020@f14g2000cwb.googlegroups.com>
References: <1139912679.559724.131020@f14g2000cwb.googlegroups.com>
Message-ID: <F5PIf.30441$F_3.27833@newssvr29.news.prodigy.net>

e2wugui at gmail.com wrote:
> thread1:
>     while 1:
>         buf = s.read()
>         process(buf)
> 
> thread2:
>     while 1:
>         buf = getdata()
>         s.write(buf)

Sockets don't have read() and write() methods. Connected
sockets have recv() and send()/sendall(). Python's socket
module has a makefile() function, but the resulting file
object wouldn't make sense in the read loop above (and
throws away control that network code typically needs).

Is it safe for one thread to receive from a socket while
another sends over the socket? Yes, that much is safe and
perfectly reasonable.


-- 
--Bryan


From johnjsal at NOSPAMgmail.com  Wed Feb 22 10:03:19 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 22 Feb 2006 15:03:19 GMT
Subject: a little more help with python server-side scripting
In-Reply-To: <mailman.2285.1140587898.27775.python-list@python.org>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>	<mailman.2280.1140581372.27775.python-list@python.org>	<JpidnVpklc7cembenZ2dnUVZ_tmdnZ2d@rcn.net>	<mailman.2284.1140586348.27775.python-list@python.org>	<8t-dndPM0buNZmbeRVn-rA@rcn.net>
	<mailman.2285.1140587898.27775.python-list@python.org>
Message-ID: <X2%Kf.1649$No6.38805@news.tufts.edu>

Steve Holden wrote:

> Note that purists might suggest this isn't the best way to use Python on 
> the web. If it gets you where you want to be, feel free to ignore them :-)

Thanks for the info. Basically I don't plan to do big stuff with Python 
on the internet (at least not right now while I'm still learning the 
language). I already know how to use a PHP include, so I could just keep 
doing that, but I figure since I'm learning Python, I might as well 
start using it wherever I can, assuming that it is okay to use it this way.


From girodt at gmail.com  Wed Feb 15 08:35:47 2006
From: girodt at gmail.com (Thomas Girod)
Date: 15 Feb 2006 05:35:47 -0800
Subject: Code organization
Message-ID: <1140010547.891395.65510@g44g2000cwa.googlegroups.com>

Hi.

I found a lot of documentation about how to code in Python, but not
much about how you organize your code in various modules / packages ...
As I am not yet used to python, this puzzle me a bit.

So, can anyone explain how one should organize and store its code ? the
uses of __init__.py files ? Maybe my question is not very clear, but I
hope someone will understand anyway ...

Thomas



From fredrik at pythonware.com  Thu Feb  2 18:15:36 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 3 Feb 2006 00:15:36 +0100
Subject: Control if a input text is IP
References: <fc5d4c490602021458l7665ce6u@mail.gmail.com>
Message-ID: <dru3qq$eic$1@sea.gmane.org>

Sbaush wrote:

> My app has in input an ip address in IPv4 notation.
> is there a function that control if input is a string in IPv4 notation?

here's one way to do it:

def ipcheck(s):
    try:
        a, b, c, d = [chr(int(c)) for c in s.split(".")]
    except ValueError:
        return False
    else:
        return True

another way is to use regular expressions; see

    http://www.regular-expressions.info/examples.html

</F>





From ivoras at __yahoo__.com_  Fri Feb  3 06:12:06 2006
From: ivoras at __yahoo__.com_ (Ivan Voras)
Date: Fri, 03 Feb 2006 12:12:06 +0100
Subject: would it be feasable to write python DJing software
In-Reply-To: <1138962918.427815.70300@g14g2000cwa.googlegroups.com>
References: <1138925819.465108.181760@o13g2000cwo.googlegroups.com>
	<druc1r$cre$1@bagan.srce.hr>
	<1138962918.427815.70300@g14g2000cwa.googlegroups.com>
Message-ID: <drvdq6$gjq$1@bagan.srce.hr>

simonwittber at gmail.com wrote:

> Actually, manipulating and mixing audio samples can be both fast and
> elegant, in Python, if you use Numeric or a similar library.

... at which point you're actually doing it in C, not pure python... :)


From pydecker at gmail.com  Sun Feb 19 22:27:41 2006
From: pydecker at gmail.com (Peter Decker)
Date: Sun, 19 Feb 2006 22:27:41 -0500
Subject: Komodo - Will it Lock Me In?
In-Reply-To: <yEncExpress_Rulz!_www.techsono.com_3223250150@firstva.com>
References: <yEncExpress_Rulz!_www.techsono.com_3223250150@firstva.com>
Message-ID: <ca55a9900602191927k396bcc0an299cb060b020ce68@mail.gmail.com>

On 2/19/06, Matt at bag.python.org <Matt at bag.python.org> wrote:

> My goal was to test out Python by writing a simple GUI app and then deploying
> it to Mac OS X and Windows XP. Using a product such as RealBasic, a totally
> green newbie could accomplish this in a few minutes.. So, I guess my main
> question is, is there such a RAD tool for Python?

You should take a look at Dabo, especially the Visual Designer. You
can create GUI applications visually in a matter of minutes without
having to write any code at all. If you want the app to do interesting
things, you can add as much code as you need to accomplish this. No
need to become a Python expert. http://dabodev.com

--

# p.d.


From duncanm255 at hotmail.com  Sun Feb 19 23:07:24 2006
From: duncanm255 at hotmail.com (D)
Date: 19 Feb 2006 20:07:24 -0800
Subject: Open Relay Test
In-Reply-To: <871wy2cldi.fsf@rose.polar.local>
References: <1140150719.298606.9710@g44g2000cwa.googlegroups.com>
	<871wy2cldi.fsf@rose.polar.local>
Message-ID: <1140408444.059247.203260@g14g2000cwa.googlegroups.com>

Thanks guys for the info..the DSBL client app is exactly what I
need..unfortunately the app I'm writing will be for Windows (the only
client I saw was for Linux). Do you know if there's a Windows command
line port?



From deets at nospam.web.de  Sat Feb  4 09:52:43 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 04 Feb 2006 15:52:43 +0100
Subject: numeric expression from string?
In-Reply-To: <mailman.1413.1139061291.27775.python-list@python.org>
References: <mailman.1413.1139061291.27775.python-list@python.org>
Message-ID: <44jtdsF2hp1mU1@uni-berlin.de>

Brian Blais schrieb:
> Hello,
> 
> I have a string input from the user, and want to parse it to a number, 
> and would like to know how to do it.  I would like to be able to accept 
> arithmetic operations, like:
> 
> '5+5'
> '(4+3)*2'
> '5e3/10**3'
> 
> I thought of using eval, which will work, but could lead to bad security 
> problems (not that it's a big  deal in my app, but still...)
> 
> string.atof won't do the job.  Is there a preferred way of doing this?

No. If you already know about the pro and cons of eval, either go for it 
- or if it bothers you, write a parser using pyparsing and evaluate the 
  expressions yourself.

Regards,

Diez


From roccomoretti at hotpop.com  Wed Feb  1 14:04:56 2006
From: roccomoretti at hotpop.com (Rocco Moretti)
Date: Wed, 01 Feb 2006 13:04:56 -0600
Subject: locals() and dictionaries
In-Reply-To: <1138818258.895406.34130@g47g2000cwa.googlegroups.com>
References: <1138818258.895406.34130@g47g2000cwa.googlegroups.com>
Message-ID: <drr0oo$2mb$1@news.doit.wisc.edu>

JerryB wrote:
> Hi,
> I have a dictionary, a string, and I'm creating another string, like
> this:
> 
> dict = {}
> dict[beatles] = "need"
> str = "love"
> 
> mystr = """All you %(dict[beatles])s is %(str)s""" % locals()
> 
> Why do I get
> keyerror: 'dict[one]'?
> 
> Is there a way to reference the elements in a dictionary with locals()
> or do I need to create a temp variable, like
> 
> need = dict[one]
> mystr = """All you %(need)s is %(str)s"""

1) Avoid variable names like 'dict' and 'str'- they cover up the builtin 
names.

2) When showing error, don't retype - cut and paste:

 >>> dict[beatles] = "need"

Traceback (most recent call last):
   File "<pyshell#6>", line 1, in -toplevel-
     dict[beatles] = "need"
NameError: name 'beatles' is not defined
 >>> dict['beatles'] = "need"
 >>>

3) In string formating, the item in parenthesis, used as a string, is 
the key for the dictionary. That is:

"""All you %(dict[beatles])s is %(str)s""" % ld

is the same as

"""All you %s is %s""" % (ld['dict[beatles]'],ld['str'])

4) Your best bet is not to use locals(), but to create a new dictionary 
with the appropriate keys. E.g.:

 >>> d = {}
 >>> d['beatles'] = "need"
 >>> s = "love"
 >>> d2 = d.copy()
 >>> d2['str'] = s
 >>> d['str']

Traceback (most recent call last):
   File "<pyshell#24>", line 1, in -toplevel-
     d['str']
KeyError: 'str'
 >>> d2['str']
'love'
 >>> mystr = """All you %(beatles)s is %(str)s""" % d2
 >>> print mystr
All you need is love


From lycka at carmen.se  Wed Feb  1 03:20:26 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 01 Feb 2006 09:20:26 +0100
Subject: Request for suggesstions and comments
In-Reply-To: <mailman.1276.1138701642.27775.python-list@python.org>
References: <mailman.1276.1138701642.27775.python-list@python.org>
Message-ID: <drpr0b$7kh$1@wake.carmen.se>

Vivek Kumar wrote:
> Hi all,
> 
>  I have to write a network server (sort of) and I am
> looking for your valuable comments.

You might want to look at twisted for this.
http://twistedmatrix.com/


From lycka at carmen.se  Thu Feb  9 11:34:44 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 09 Feb 2006 17:34:44 +0100
Subject: Rethinking the Python tutorial
Message-ID: <dsfqv4$shc$1@wake.carmen.se>

While the official Python Tutorial has served its
purpose well, keeping it up to date is hardly anyones
top priority, and there are others who passionately
create really good Python tutorials on the web.

I think 'A Byte of Python' by Swaroop C H is a good
beginners tutorial, and 'Dive Into Python' by Mark
Pilgrim is a good tutorial for more experienced
programmers.

My radical idea is that we mirror these at
diveinto.python.org and byteof.python.org, and
simply remove the old tutorial from the Python
2.5 (or 2.6?) docs. Give these two good texts an
official status as the Python tutorials.

Just as we want to adopt best of breed packages
for the standard library, I think we should use
best of breed documentation, and I think there are
less backward compatibility issues with tutorials
than with libraries. :)

I think this change would give us better docs as
well as a smaller maintenance burden. If a day
comes when Mark Pilgrim or Swaroop C H don't want
to maintain these texts, I strongly suspect that
there are other tutorials we can replace them with
if noone else steps in to keep them up to date.


From lycka at carmen.se  Mon Feb 20 14:36:01 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Mon, 20 Feb 2006 20:36:01 +0100
Subject: Python 3000 deat !? Is true division ever coming ?
In-Reply-To: <mailman.2106.1140289668.27775.python-list@python.org>
References: <1139810036.943598.229030@g47g2000cwa.googlegroups.com>	<dt4pj8$o21$1@wake.carmen.se>	<1140213665.105188.103450@o13g2000cwo.googlegroups.com>
	<mailman.2106.1140289668.27775.python-list@python.org>
Message-ID: <dtd5n2$5gr$1@wake.carmen.se>

Steve Holden wrote:
> seb.haase at gmail.com wrote:
>> My main point was/is:  why is there not more discussion about "true
>> division" !!?
> 
> You are about three years too late for the discussion. It was debated to 
> death when Guido proposed that Python should behave more like 
> non-programmers expected it to. Despite some fierce opposition this view 
> eventually held sway, and now long-time Pythonistas accept it as the way 
> forward.

I think you should understand "discussion" as "mentioning" or
"documentation" here.

However much it was discussed three years ago, enabling it as
default in 3.0 will be a bit like the Vogons suddenly appearing
to demolish Earth, if it hasn't been documented clearly.

The tutorial shouldn't teach a coding style that will cause
problems when we reach the next major version of Python. At
least not if it's easily avoided.

Python has supported true division for more than four years, and
it's been decided from the onset that this will be default behaviour
in 3.0. The Tutorial basically ignores it. Ok, it's mentioned in
passing in the glossary, but not where it explains how division works!

> So basically most people saw your question and probably thought "enough, 
> already!".

Having followed comp.lang.python for several years should not be a
requirement for programming Python properly. Neither should it be a
requirement to read all the PEPs or "what's new in Python version
2.2" when someone starts learning Python with 2.4! I had more or less
forgotten about this (do you use "from __future__ import division"
in all your scipts Steve?) so I think it's a good thing that this
was brought up. Particularly if Guido's Google jobs brings 3.0
closer to its release...

I started http://wiki.python.org/moin/FutureProofPython as a place
to document this, but I doubt that yet-another-wiki-page is the
perfect solution for this. It might be useful as a placeholder for
the time being though, and I hope that some of you who are better
at this than I am improves that page a bit, and more importantly,
that it gets into the Tutorial.

I've now inspected more than 1700 python files from a number of
sources, Twisted being one of them, with 235kLoC, written by scores
of different developers. I found no "from __future__ import division"
statement, but almost 7000 lines with '/' that needs to be inspected
one way or another. (Not all divisions, I'm sure, but still a
substancial amount of work to check, and plenty of new test cases.)


From lycka at carmen.se  Mon Feb 20 11:24:54 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Mon, 20 Feb 2006 17:24:54 +0100
Subject: Python 3000 deat !? Is true division ever coming ?
In-Reply-To: <pan.2006.02.18.01.09.01.860632@REMOVETHIScyber.com.au>
References: <1139810036.943598.229030@g47g2000cwa.googlegroups.com>
	<dt4pj8$o21$1@wake.carmen.se>
	<1140213665.105188.103450@o13g2000cwo.googlegroups.com>
	<pan.2006.02.18.01.09.01.860632@REMOVETHIScyber.com.au>
Message-ID: <dtcqgm$a57$1@wake.carmen.se>

Steven D'Aprano wrote:
> The tutorial shouldn't talk about Python3000 at all. What would be the
> point of that? The tutorial is there to teach about the way Python works
> now, not to make guesses and prediction about how it will work some time
> in the indefinite future.

There is no guessing involved.

The new division behaviour was implemented years ago, but to
avoid breaking old code, it's not enabled by default.

For new code, you ought to use 'from __future__ import division'
and use // whenever you want floor division, regardless of
that numeric types you divide. The ordinary / shouldn't truncate
fractions.

The problem is that the tutorial doesn't tell python programmers
to do this.

I can understand that there is a pedagogical problem here.

Division is introduced way earlier than the import statement in
the tutorial, and the "from __future__" thingie might not be the
first thing you want to expose for a beginner.


From neuzhoundxx at yahoo.com  Tue Feb 21 18:15:11 2006
From: neuzhoundxx at yahoo.com (john peter)
Date: Tue, 21 Feb 2006 15:15:11 -0800 (PST)
Subject: interpreting the fractional portion of time.clock() vs time.time()
	measurements
Message-ID: <20060221231511.79988.qmail@web36707.mail.mud.yahoo.com>

   let's say i'm taking timing measurements in Windows XP
       
      t1 = time.clock()
      ...
      t2 = time.clock()
       
      t3 = t2 - t1 = say, 0.018
        what is the unit of measurement for t3? is it correct to say that t3 = 18 milliseconds? microseconds?
       
            what if the timing function used for t1 and t2 was time.time()? is it still correct to
  say that t3 = 18 milliseconds? i kinda know that in Windows, time.clock() has
  higher resolution than time.time().  all i need is millisecond resolution. which
  of these functions would be easier to translate into millisecond units of measurement?
  

__________________________________________________
Do You Yahoo!?
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From smitty_one_each at bigfoot.com  Sat Feb 18 09:23:24 2006
From: smitty_one_each at bigfoot.com (Chris Smith)
Date: Sat, 18 Feb 2006 09:23:24 -0500
Subject: Activestate python installation
References: <1140243666.990365.131220@f14g2000cwb.googlegroups.com>
Message-ID: <87r760n3tv.fsf@bigfoot.com>

>>>>> "mik3" == mik3  <mik3l3374 at hotmail.com> writes:

    mik3> hi this is a question regarding installing Activestate
    mik3> python whenever i try to install the latest Activestate
    mik3> Python on WinXP SP2, it gives me error saying "The wizard
    mik3> was interrupted before Activestate 2.4.2 could be completely
    mik3> installed. Your system has not been modified ....."  any
    mik3> ideas why this is going on?  thanks

Administrator?
Writeable drive?
Is there an install log file you could locate?
R,
C


From tjreedy at udel.edu  Tue Feb 21 01:46:15 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 21 Feb 2006 01:46:15 -0500
Subject: Augmented assignment
References: <dte88n$568$2@home.itg.ti.com>
Message-ID: <dted0g$c3j$1@sea.gmane.org>


"Suresh Jeevanandam" <jm.suresh at gmail.com> wrote in message 
news:dte88n$568$2 at home.itg.ti.com...
> Hi,
> Is there any gain in performance because of augmented assignments.
>
> x += 1  vs x = x+1
>
> Or are both of them the same.

The main gain is in programmer performance for writing a long name such as 
number_of_items once instead of twice.  Also in reading to see that the 
same name gets rebound to the new name.

Program performance might be noticeable if 'x' is something like a.b.c.d 
that takes some lookup time.  But again, I would use the += form for 
readability without testing run time.

Terry Jan Reedy





From grante at visi.com  Tue Feb  7 09:45:07 2006
From: grante at visi.com (Grant Edwards)
Date: Tue, 07 Feb 2006 14:45:07 -0000
Subject: Best way of finding terminal width/height?
References: <96nFf.43896$d5.199922@newsb.telia.net>
	<11uc3dohfitotc5@corp.supernews.com>
	<jysFf.155352$dP1.513537@newsc.telia.net>
	<11udc0r2bq11042@corp.supernews.com> <43E719EE.3040401@gmail.com>
	<11ueq4nhn91qm91@corp.supernews.com> <43E8659D.6010101@gmail.com>
Message-ID: <11uhcjj2p10mm0d@corp.supernews.com>

On 2006-02-07, Joel Hedlund <joel.hedlund at gmail.com> wrote:

> As before, the only IO case above that doesn't throw
> exceptions is the uncommented one. 
>
>> Yup, that's the exception.  Standard practice is to catch it and
>> retry the I/O operation.
>
> Hmm... I guess it's not that easy to "retry" IO operations on
> pipes and streams (stdin/stdout in this case)...

You just call the failed read() or write() again.  Unless
there's some way that the read/write partially succeeded and
you don't have any way to know how many bytes were
read/written, If that's the case then Python's "file" object
read and write would appear to be broken by design.

> And I tend to lean pretty heavily on those since I usually
> write UNIX style text "filters".
>
> So in case I haven't missed something fundamental I guess my
> best option is to accept defeat (of sorts :-) and be happy
> with picking a terminal width at program startup.
>
> But anyway, it's been really interesting trying this out. 
>
> Thank you Grant (och Jorgen) for all help and tips!

-- 
Grant Edwards                   grante             Yow!  BRILL CREAM is
                                  at               CREAM O' WHEAT in another
                               visi.com            DIMENSION...


From johnjsal at NOSPAMgmail.com  Tue Feb 14 11:19:30 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 14 Feb 2006 16:19:30 GMT
Subject: how do you pronounce 'tuple'?
In-Reply-To: <mailman.1905.1139931613.27775.python-list@python.org>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>	<11v032ii4gvik72@corp.supernews.com>	<1139816300.706181.79250@f14g2000cwb.googlegroups.com>
	<mailman.1905.1139931613.27775.python-list@python.org>
Message-ID: <mqnIf.1614$No6.38197@news.tufts.edu>

Tim Peters wrote:

> "tuhple" is a girly-man affectation.  That's why Guido and I both say
> the manly "toople".  

Heh heh. Actually, 'toople' sounds like a noun to me, and 'tuple' sounds 
like a verb, so I prefer 'toople' anyway.


From jasondrew72 at gmail.com  Mon Feb 20 17:59:14 2006
From: jasondrew72 at gmail.com (Jason Drew)
Date: 20 Feb 2006 14:59:14 -0800
Subject: converting sqlite return values
In-Reply-To: <1140465583.398495.63470@g44g2000cwa.googlegroups.com>
References: <1140465583.398495.63470@g44g2000cwa.googlegroups.com>
Message-ID: <1140476354.932279.184780@g43g2000cwa.googlegroups.com>

Hi,

You can use the built-in function "eval" to return how Python evaluates
your string. For example:
>>> eval( '(1,2,3,4)' )
(1, 2, 3, 4)

In other words, eval will take your string that looks like a tuple, and
return an actual tuple object.

Note that the 'u' prefix in your string will cause an error if you pass
it to eval, so you should drop that, e.g.:
>>> utuple = 'u(1,2,3,4)'
>>> eval( utuple[1:] )
(1, 2, 3, 4)

In general, though, converting your strings/tuples back and forth like
this might not be the best idea, depending on the situation. If the
numbers represent consistent items, like (price, tax, code, quantity),
then you would do better to use a field for each item in your database
and insert/fetch the numbers appropriately.

Storing whole Python objects in single database fields isn't unheard
of, but in general you should only do it when you really need to do it.
When you do, there are various Python modules to help, though I haven't
used this approach much myself.

Jason



From steve at holdenweb.com  Fri Feb 10 07:21:52 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 10 Feb 2006 07:21:52 -0500
Subject: a second TKinter
In-Reply-To: <1d987df30602100320t4c61673ewfa6cd0f685a24bab@mail.gmail.com>
References: <1d987df30602100253x33aece59u425dd7d61c0ffa3f@mail.gmail.com>	<6f4025010602100256m5f390357o@mail.gmail.com>
	<1d987df30602100320t4c61673ewfa6cd0f685a24bab@mail.gmail.com>
Message-ID: <dsi0gv$mpu$1@sea.gmane.org>

linda.s wrote:
> On 2/10/06, Michael Foord <fuzzyman at gmail.com> wrote:
> 
>>
>>
>>On 10/02/06, linda.s <samrobertsmith at gmail.com> wrote:
>>
>>>I found if I opened a second TKinter, Python will go out of work. But
>>>I need two graph outputs at the same time. What to do?
>>>Linda.
>>>
>>
>>
>>Hello linda (?),
>>
>>How are you opening a 'second Tkinter' ? There is no problem with having two
>>top level windows at the same time, you can't hjave two 'mainloops' though.
>>:-)
>>
>>All the best,
>>
>>Fuzzyman
> 
> What does "having two top level windows" mean?
> Can you give an example?
> For opening a second tkinter, i mean that I run python using
> PythonWin: if I run the code again when the first Tk is still open,
> then the program will crash.

You are actually doing well to run even *one* Tkinter-based application 
under PythonWin, since PythonWin is an MFC-based Windows application. 
There may well be conflict between the multiple windowing modules in use.

Not a good idea to run GUI-based applications under an IDE that isn't 
designed to handle them. Sorry.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From claird at lairds.us  Sat Feb 25 21:08:01 2006
From: claird at lairds.us (Cameron Laird)
Date: Sun, 26 Feb 2006 02:08:01 GMT
Subject: Pythonic exceptionalism (was: A C-like if statement)
References: <hp-dnY20cusOnGPeRVn-rg@nmt.edu> <dtl04p$5q2$1@reader2.panix.com>
	<sdadnS6nfNnbmmPeRVn-sw@nmt.edu>
	<pan.2006.02.23.22.14.53.56541@REMOVETHIScyber.com.au>
Message-ID: <ice7d3-j5i.ln1@lairds.us>

In article <pan.2006.02.23.22.14.53.56541 at REMOVETHIScyber.com.au>,
Steven D'Aprano  <steve at REMOVETHIScyber.com.au> wrote:
>On Thu, 23 Feb 2006 12:04:38 -0700, Bob Greschke wrote:
>
>>> try:
>>>    i = a.find("3")
>>>    print "It's here: ", i
>>> except NotFound:
>>>    print "No 3's here"
>> 
>> Nuts.  I guess you're right.  It wouldn't be proper.  Things are added or 
>> proposed every day for Python that I can't even pronounce, but a simple 'if 
>> (I = a.find("3")) != -1' isn't allowed.  Huh.  It might be time to go back 
>> to BASIC. :)
>
>There are *reasons* why Python discourages functions with side-effects.
>Side-effects make your code hard to test and harder to debug.
>
>> I think your way would work if .find() were replaced with .index().  I'm 
>> just trying to clean up an if/elif tree a bit, so using try would make 
>> things bigger.
>
>Then write a function! Instead of calling the try..except block in every
>branch directly, pull it out into a function:
>
>def test(s,what):
>    try:
>        i = s.index(what)
>        print "It's here: ", i
>    except ValueError:
>        print "No 3's here"
			.
			.
			.
A recent piece by Collin Park <URL:
http://www.linuxjournal.com/article/8794 >
illustrates how a user-defined exception
arises so naturally in a tiny toy example
that it occurs to a teenager first program-
ming.


From sw at wordtech-software.com  Sat Feb 11 09:34:37 2006
From: sw at wordtech-software.com (Kevin Walzer)
Date: Sat, 11 Feb 2006 09:34:37 -0500
Subject: Yet another GUI toolkit question...
In-Reply-To: <1139651109.458106.239760@o13g2000cwo.googlegroups.com>
References: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
	<m2d5huwof8.fsf@unique.fqdn>
	<43ED6990.1020707@wordtech-software.com>
	<1139651109.458106.239760@o13g2000cwo.googlegroups.com>
Message-ID: <7be9b$43edf5fd$4275d90a$3241@FUSE.NET>

dberlin at gmail.com wrote:
> What's wrong with wxPython? (http://www.wxpython.org)
> Didn't see it mentioned here.
> 
> ----
> David Berlin
> http://farpy.holev.com - Python GUI Editor
> 
I did mention it...see "scaling the wxPython mountain."


-- 
Kevin Walzer
iReveal: File Search Tool
http://www.wordtech-software.com


From paul at boddie.org.uk  Thu Feb  9 16:50:55 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 9 Feb 2006 13:50:55 -0800
Subject: creat a DOM from an html document
References: <hr6Gf.1933$rL5.1215@newssvr27.news.prodigy.net>
	<oE6Gf.1938$rL5.241@newssvr27.news.prodigy.net>
	<mailman.1679.1139516333.27775.python-list@python.org>
Message-ID: <1139521855.447729.286850@g14g2000cwa.googlegroups.com>

John J. Lee wrote:
> Mark Harrison <mh at pixar.com> writes:
>
> > Ahh, it's BeautifulSoup...
>
> Strictly that's not THE DOM, just A document object model.  The DOM
> proper is a standardised interface, which BeautifulSoup does not
> implement.  You could build a DOM using BeautifulSoup, though.

For a certain value of standardised, libxml2dom provides "the DOM" for
HTML:

import urllib, libxml2dom
f = urllib.urlopen("http://www.python.org")
s = f.read(); f.close()
d = libxml2dom.parseString(s, html=1)
print "There are", len(d.xpath("//table")), "tables in the document."

See http://www.python.org/pypi/libxml2dom for more information.

Paul



From jjl at pobox.com  Sat Feb  4 18:39:53 2006
From: jjl at pobox.com (John J. Lee)
Date: Sat, 04 Feb 2006 23:39:53 GMT
Subject: Python vs C for a mail server
References: <mailman.3994.1138546139.27774.python-list@python.org>
	<mailman.1197.1138549204.27775.python-list@python.org>
	<1138728303.669646.36940@g49g2000cwa.googlegroups.com>
	<drqa42$8k8$1@wake.carmen.se>
	<1138805854.533303.279610@g49g2000cwa.googlegroups.com>
	<donn-FA6F36.09312101022006@gnus01.u.washington.edu>
	<1138819666.521465.108000@o13g2000cwo.googlegroups.com>
Message-ID: <87wtgar8vp.fsf@pobox.com>

"Randall Parker" <techiepundit at futurepundit.com> writes:
[...]
> Also, a lot of C++'s flaws flow from the fact that it is old and grew
> in lots of increments.

That was a deliberate decision on the part of C++'s designers!-)

I guess the same is true of Python in some respects: it's still
incrementally changing (more than C++, I guess), and isn't all that
much younger than C++ (around 15 and 23 years old respectively).


> In my experience the overhead of explicitly deleting objects in C/C++
> is not the big burden that some argue here is the biggest reason to use
> Python instead of C++.

Should we be entirely surprised that from somebody from a engineering
/ numerical analysis background has that experience?  Fortran 77
didn't even *have* a standard way to do dynamic memory allocation, did
it?  I certainly do think garbage collection is useful in that
context, though...


John


From john_zenger at yahoo.com  Sat Feb 18 08:36:59 2006
From: john_zenger at yahoo.com (John Zenger)
Date: Sat, 18 Feb 2006 08:36:59 -0500
Subject: Should we still be learning this?
In-Reply-To: <xuGdnQRiLabDiGrenZ2dnUVZ_tWdnZ2d@is.co.za>
References: <xuGdnQRiLabDiGrenZ2dnUVZ_tWdnZ2d@is.co.za>
Message-ID: <FYCdnYtvV8-cvmreRVn-gQ@comcast.com>

Don't overly concern yourself with your course being 100% up to date. 
When learning programming, the concepts are what is important, not the 
syntax or libraries you happen to be using.  Even if they were to teach 
you the latest and greatest features of 2.4.2, that would be out of date 
in a few months/years when the next version comes along and the Python 
gods decide to deprecate the entire os module or something.

Syntax and libraries change; just roll with it.  When you are a student, 
the important thing is learning the mental skills of how to put it all 
together.  When I was a wee lad, they taught me Pascal, a language that 
is now as dead as Latin, but I now realize that the language did not 
matter; all that mattered was that I learned the basics of how to design 
and put together a program in a (procedural) language.  Once I knew 
that, it was a cinch to teach myself C in an afternoon, and only 
slightly tougher to learn C++ and then Java.

Python is a good teaching language because by learning one language you 
learn three major programming paradigms: procedural, OO, and functional. 
  It doesn't matter if, three years from now, a Dark Age descends upon 
the land and Python becomes as extinct as Pascal.  If your course was 
decent, you spent your time learning programming, not just learning 
today's syntax and libraries, and you'll be able to learn Microsoft 
Visual C#++.Net.Com.Org or whatever other language happens to be 
fashionable in the future.

And BTW, map and filter are such useful concepts that it makes sense to 
teach them to students even if they will one day be deprecated in 
Python.  If you want to teach yourself Haskell or a Lisp dialect (and 
you should!), knowing those concepts will come in very handy.

Max wrote:
> On monday I start a semester course in Python (the alternative was 
> Java). I was looking through the course outline and noticed the following:
> 
> 1) UserDict is used. This is deprecated, right?
> 2) There is no mention of list comprehensions, but map and filter are 
> taught early and then revisited later. I don't think this is good: list 
> comprehensions are, IMO, one of Python's great features, Psyco prefers 
> them, they're more pythonic, and map and filter seem to be going out the 
> window for Python 3000.
> 
> What do you think?
> 
> --Max


From oshecho at gmail.com  Mon Feb 20 18:07:57 2006
From: oshecho at gmail.com (Echo)
Date: Mon, 20 Feb 2006 18:07:57 -0500
Subject: editor for Python on Linux
In-Reply-To: <L8fKf.11481$uQ4.3014@tornado.fastwebnet.it>
References: <dtai6e$23m$2@ariane.blic.net>
	<1140423903.462774.193920@g14g2000cwa.googlegroups.com>
	<L8fKf.11481$uQ4.3014@tornado.fastwebnet.it>
Message-ID: <910885da0602201507y486c681fv2727235186043f64@mail.gmail.com>

On 2/20/06, billie <mlist at fastwebnet.it> wrote:
> I really think that IDLE is one of the best around in Python source editing.
For me, I find that IDLE is about the worse for editing Python sources.

I used to use Notepad++ before I started using Boa. Sometimes I still
use Notepad++ because I can easly right click on a file to open it up
in Notepad++.

I use the editor that comes with Dabo. It has most features that any
good python editor has. It does CURRENTLY lack many options, however
that will change in the future. All of Dabo is being worked on and
updated a lot, sometimes as much as 10-15 things changed, added and/or
fixed in a day. Although, you will want the svn version for the most
resent changes.

--
-Echo


From sam at nuevageorgia.com  Tue Feb 14 10:58:02 2006
From: sam at nuevageorgia.com (SamFeltus)
Date: 14 Feb 2006 07:58:02 -0800
Subject: Embedding an Application in a Web browser
In-Reply-To: <1139932108.356041.155100@g14g2000cwa.googlegroups.com>
References: <1139930045.408507.151440@g43g2000cwa.googlegroups.com>
	<1139932108.356041.155100@g14g2000cwa.googlegroups.com>
Message-ID: <1139932682.203839.212200@g44g2000cwa.googlegroups.com>

Perhaps IronPython could be hacked in somehow also?  Seems like it
might could.



From patrik at olga.removethispart.mine.removethispart.nu  Tue Feb 14 14:55:46 2006
From: patrik at olga.removethispart.mine.removethispart.nu (Patrik Blommaskog)
Date: Tue, 14 Feb 2006 20:55:46 +0100
Subject: Pythonic gui format?
In-Reply-To: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
Message-ID: <dstd14$nvl$1@wake.carmen.se>

How about this:


def mogrify():
   print "Mogrifying"

gui = window(title = "Hello World!") [
         image(text = "nice pics here", pos = (5, 5), src = "img.png"),
         text(opts = "italic") ["(some text here)"],
         lst() [
           "first element",
           "second element"
         ],
         button(action = mogrify, text = "Click Me!")
       ]


There may be some slight errors above, but the principle works for me. 
The gui is described with valid Python code, and object order, types, 
parameter checking etc works in the way you would expect in Python. If 
you try not to think about how it abuses Pythons items, I find it quite 
nifty.

I have a toy project where I build a gui like this, with two major 
differences from your wishlist: (1) My code does not contain the actual 
widget objects, but instead builds a tree that gets traversed to build 
the gui objects. (2) The only parser I have right now builds html 
documents with callback dispatching (using Turbogears). I envision 
generation of gui code for locally executed GUI:s (e g wxPython) as 
well. However, I see no immediate reason that you should not be able to 
put the actual widget objects in the tree like illustrated above.

I did not in any way invent this method of description. If you are 
interested, a more mature use can be found in Nevow 
(http://divmod.org/trac/wiki/DivmodNevow) where they have a document 
object model called Stan, using a similar method to generate xhtml 
documents. I'd be happy to hear about other uses.

I'll leave it to others to have opinions about whether it is to be 
considered pythonic.


- Patrik


From johnjsal at NOSPAMgmail.com  Mon Feb 13 10:54:37 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 13 Feb 2006 15:54:37 GMT
Subject: how do you pronounce 'tuple'?
In-Reply-To: <11v18rggmsa317d@corp.supernews.com>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net> <eiUHf.7378$bd4.6826@edtnps84>
	<yd1If.1599$No6.38148@news.tufts.edu>
	<11v18rggmsa317d@corp.supernews.com>
Message-ID: <1Z1If.1601$No6.38091@news.tufts.edu>

Grant Edwards wrote:
> On 2006-02-13, John Salerno <johnjsal at NOSPAMgmail.com> wrote:
>> Markus Wankus wrote:
>>
>>> I'm not sure, but I think it is pronounced "m?nage ? trois".
>> LOL. You guys are hilarious. I think I made the right decision
>> to start learning Python!  :)
> 
> Of course! What did you expect from devotees of a language
> named after one of the greatest comedy shows in TV history?
> 

Well, I hope this doesn't make me lose credibility, but I've actually 
never seen the show! I saw Holy Grail several years ago, though. But I'm 
very curious about this whole cheese shop skit, so when I get home 
tonight I'm going to download it. :)


From ivoras at fer.hr  Sun Feb  5 20:35:39 2006
From: ivoras at fer.hr (Ivan Voras)
Date: Mon, 06 Feb 2006 02:35:39 +0100
Subject: Thread imbalance
In-Reply-To: <ds5m9j$1p$1@panix2.panix.com>
References: <1138912272.382474.13170@g44g2000cwa.googlegroups.com>
	<ds3d35$mo6$2@bagan.srce.hr>
	<mailman.1427.1139097680.27775.python-list@python.org>
	<ds55tb$n00$1@bagan.srce.hr> <ds5m9j$1p$1@panix2.panix.com>
Message-ID: <ds6970$n5l$1@bagan.srce.hr>

Aahz wrote:

> 
> When did Perl gain threads? 

At least in 2001:
http://mail.python.org/pipermail/python-dev/2001-August/017079.html
http://www.xav.com/perl/lib/Pod/perlthrtut.html

> If you read Bruce Eckel, you also know that
> the Java threading system has been buggy for something like a decade.

I'm sure precisely this is the reason why all Java Enterprise systems 
(J2EE) are threaded network servers :)


From fredrik at pythonware.com  Mon Feb 20 11:46:02 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 20 Feb 2006 17:46:02 +0100
Subject: Processing text using python
References: <1140451760.998278.90430@g43g2000cwa.googlegroups.com>
Message-ID: <dtcroc$8p3$1@sea.gmane.org>

"nuttydevil" <sjw28 at sussex.ac.uk> wrote:

> Hey everyone! I'm hoping someone will be able to help me, cause I
> haven't had success searching on the web so far... I have large chunks
> of text ( all in a long string) that are currently all in separate
> notebook files. I want to use python to read these strings of text,
> THREE CHARACTERS AT A TIME. (I'm studying the genetic code you see, so
> I need to read and analyse each sequence one codon at a time
> effectively.) Does anyone have any idea of how to do this using python?

did you read the string chapter in the tutorial ?

http://docs.python.org/tut/node5.html#SECTION005120000000000000000

around the middle of that chapter, there's a section on slicing:

    "substrings can be specified with the slice notation: two indices
    separated by a colon"

</F>





From http  Mon Feb 27 06:47:33 2006
From: http (Paul Rubin)
Date: 27 Feb 2006 03:47:33 -0800
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>
	<4402AB7F.7070804@REMOVEMEcyber.com.au>
	<7xzmkdxkce.fsf@ruckus.brouhaha.com>
	<mailman.2467.1141034300.27775.python-list@python.org>
	<7xoe0tozf8.fsf@ruckus.brouhaha.com>
	<mailman.2468.1141037581.27775.python-list@python.org>
Message-ID: <7xaccdvx9m.fsf@ruckus.brouhaha.com>

Felipe Almeida Lessa <felipe.lessa at gmail.com> writes:
> > If enums aren't supposed to work in that construction then the PEP
> > shouldn't specify that they work that way.
> 
> Sorry, but where do they say that? 

The PEP gives an example of iterating through the members of an enum.
I'm not sure if that's what you're asking, but if you meant something
else, it went past me.


From steve at holdenweb.com  Sat Feb 25 01:53:04 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 25 Feb 2006 01:53:04 -0500
Subject: Trolling for New Web Host . . .
In-Reply-To: <1140811452.070955.105180@e56g2000cwe.googlegroups.com>
References: <1140811452.070955.105180@e56g2000cwe.googlegroups.com>
Message-ID: <dtouse$uku$1@sea.gmane.org>

Ben Wilson wrote:
> I've had the same web host (imhosted.com) for the past three years, and
> have had decent service. However, I'm also trying to learn Python the
> hard way--by doing. So, I figured I'd write a few Python CGIs
> (non-Zope). Unfortunately, my web host does not have mod_python. They
> only way I can run a python script is by using the .cgi extension. I'm
> not sure if I want to stick with my host and just call my apps
> index.cgi, or if I should move to a new server. If I were to move to a
> new server, which would you recomend, and why?
> 
I'd recommend that you don't change anything until you have good reason 
- a business relationship that works is to be valued above a notional 
speed gain in a currently non-existent web application.

If you're just learning, CGI is fine. Migrate to mod_python when you 
start to feel limited by CGI, or when you discover a specific need for 
mod_python's neat functionality.

The only other advice I'd give you is to download Python on to your 
desktop or laptop machine and do some of your learning locally. It's 
quite difficult to debug through a web interface if you don't know what 
you're doing (and remember the cgitb module is your friend).

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From fredrik at pythonware.com  Thu Feb 16 03:08:22 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Feb 2006 09:08:22 +0100
Subject: How to run shell commands within python
References: <1140074469.258382.24620@f14g2000cwb.googlegroups.com><dt19cr$otl$1@oravannahka.helsinki.fi>
	<1140074866.157972.214920@o13g2000cwo.googlegroups.com>
Message-ID: <dt1btp$oe5$1@sea.gmane.org>

"fileexit" wrote:

> thanks... i was to hasty to post this question, i found a good answer
> here:
> http://groups.google.com/group/comp.lang.python/browse_thread/thread/ffdab847125f81b6

that's an old thread, and Python has grown a few more ways to
deal with shell commands since then.  if os.system isn't good en-
ough for you, subprocess is the preferred alternative:

    http://www.python.org/doc/lib/module-subprocess.html

(also note that most trivial shell commands are better done in
python.  most uses of cat, for example, can be trivially emulated
with one or two lines of python...)

</F>





From peter at engcorp.com  Thu Feb 16 09:38:59 2006
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 16 Feb 2006 09:38:59 -0500
Subject: Is empty string cached?
In-Reply-To: <tgSIf.12036$MJ.8017@fed1read07>
References: <cUMIf.11894$MJ.4803@fed1read07>	<mailman.1981.1140057796.27775.python-list@python.org>
	<tgSIf.12036$MJ.8017@fed1read07>
Message-ID: <dt22pv$7fv$1@sea.gmane.org>

Farshid Lashkari wrote:
> However, the following commands add to my confusion:
> 
>  >> a = 'wtf?'
>  >> b = 'wtf?'
>  >> a is b
> False
> 
> So how are string literals cached? Is there an explanation somewhere? Is 
> it some freaky voodoo, and I should just assume that a string literal 
> will always generate a new object?

A few comments (which I hope are correct, but which I hope you will read 
then mostly ignore since you probably shouldn't be designing based on 
this stuff anyway):

1. What you see at the interactive prompt is not necessarily what will 
happen in a compiled source file.  Try the above test with and without 
the question mark both at the interactive prompt and in source and see.

2. The reason for the difference with ? is probably due to an 
optimization relating to looking up attribute names and such in 
dictionaries.  wtf? is not a valid attribute, so it probably isn't 
optimized the same way.

2.5. I think I had a third comment like the above but after too little 
sleep last night it seems it's evaporated since I began writing...

3. As Steve or someone said, these things are implementation details 
unless spelled out explicitly in the language reference, so don't rely 
on them.

4. If you haven't already written your code and profiled and found it 
lacking in performance and proving that the cause is related to whether 
or not you hoisted the string literal out of the loop, you're wasting 
your time and this is a good opportunity to begin reprogramming your 
brain not to optimize prematurely.  IMHO.  FWIW. :-)

-Peter



From irvine.david at gmail.com  Sun Feb 12 19:09:53 2006
From: irvine.david at gmail.com (dirvine)
Date: 12 Feb 2006 16:09:53 -0800
Subject: by reference
In-Reply-To: <43ef1edd$0$4165$636a55ce@news.free.fr>
References: <mailman.1681.1139517426.27775.python-list@python.org>
	<1139598954.259297.74290@o13g2000cwo.googlegroups.com>
	<43ef1edd$0$4165$636a55ce@news.free.fr>
Message-ID: <1139789393.053912.15310@g14g2000cwa.googlegroups.com>

Yes I did

I was trying to do something like (pseudo code)

write:
get files in path
for each filename get size, type
create dic called filename assign size:xx,type:y
pickle to file

read:
open pickled file
read dict name and contents (hoping unpickling file gives me the dict
name as it was saved, which may not be true)
do stuff with file


and thats it. My prog is a bit more complex than this but this is the
general idea basically read files -> create dicts of files one at a
time, very similar to bittorrent in that take a file smash to bits and
store links to bits in a big file.

Many thanls
David



From bonono at gmail.com  Thu Feb 23 19:49:09 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 23 Feb 2006 16:49:09 -0800
Subject: A C-like if statement
In-Reply-To: <pan.2006.02.23.22.14.53.56541@REMOVETHIScyber.com.au>
References: <hp-dnY20cusOnGPeRVn-rg@nmt.edu><dtl04p$5q2$1@reader2.panix.com>
	<sdadnS6nfNnbmmPeRVn-sw@nmt.edu>
	<pan.2006.02.23.22.14.53.56541@REMOVETHIScyber.com.au>
Message-ID: <1140742149.011750.321530@z34g2000cwc.googlegroups.com>


Steven D'Aprano wrote:
> On Thu, 23 Feb 2006 12:04:38 -0700, Bob Greschke wrote:
>
> >> try:
> >>    i = a.find("3")
> >>    print "It's here: ", i
> >> except NotFound:
> >>    print "No 3's here"
> >
> > Nuts.  I guess you're right.  It wouldn't be proper.  Things are added or
> > proposed every day for Python that I can't even pronounce, but a simple 'if
> > (I = a.find("3")) != -1' isn't allowed.  Huh.  It might be time to go back
> > to BASIC. :)
>
> There are *reasons* why Python discourages functions with side-effects.
> Side-effects make your code hard to test and harder to debug.
>

>>> "test".index("a")
Traceback (most recent call last):
  File "<pyshell#0>", line 1, in -toplevel-
    "test".index("a")
ValueError: substring not found
>>> "test".find("a")
-1



From mahmood.tariq at gmail.com  Wed Feb 15 18:59:47 2006
From: mahmood.tariq at gmail.com (Tariq)
Date: 15 Feb 2006 15:59:47 -0800
Subject: Scientific Computing with NumPy
In-Reply-To: <mailman.1739.1139656835.27775.python-list@python.org>
References: <ds7bvh$ab1$2@gemini.csx.cam.ac.uk>
	<mailman.1482.1139225595.27775.python-list@python.org>
	<ds7ch4$bj7$1@gemini.csx.cam.ac.uk>
	<1d987df30602100415o16ad3d02n71aca12686667ff@mail.gmail.com>
	<mailman.1739.1139656835.27775.python-list@python.org>
Message-ID: <1140047987.435267.194220@g43g2000cwa.googlegroups.com>

Has anyone been able to successfully install numpy 0.9.4 on python 2.4
under cygwin?

I'm getting a few errors, especially while it installs the C source.

--
Tariq



From pprobert at wisc.edu  Thu Feb 23 17:12:17 2006
From: pprobert at wisc.edu (Paul Probert)
Date: Thu, 23 Feb 2006 16:12:17 -0600
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <dtlat7$80c$1@sea.gmane.org>
References: <dtl9ad$35h$1@sea.gmane.org> <dtlat7$80c$1@sea.gmane.org>
Message-ID: <dtlc01$dd2$1@sea.gmane.org>

Peter Hansen wrote:

>Are you saying that you believe the time.sleep(1) call is actually 
>blocking for 200 seconds?  Or just that your loop (and we can only guess 
>what it looks like) is the one taking that long?
>
>If the former, try something like putting "print 'before'" and "print 
>'after'" before and after the sleep, and observe what happens when you 
>run the program.  I'm fairly confident in saying there's no chance 
>you'll see the "before" sit for 200s before you see the "after" and that 
>your problem lies elsewhere, not with time.sleep(1).
>
>If the latter, um, obviously we can't help without more info.
>
>-Peter
>
>  
>
Yes, I'm doing this:
           .....
          oldtime=time.time()
          time.sleep(1)
          newtime=time.time()
          dt=newtime-oldtime
           if dt > 2:
               print 'dt=',dt,' time=',time.strftime('%Y_%m_%d_%Hh_%Mm_%Ss')
Its happening roughly 4 times a day total on our 20 machines, ie about 
once every 5 days on a given machine.

Paul Probert
University of Wisconsin



From pink at odahoda.de  Fri Feb 17 14:34:10 2006
From: pink at odahoda.de (Benjamin Niemann)
Date: Fri, 17 Feb 2006 20:34:10 +0100
Subject: Apparent eval() leak for python 2.3.5
References: <mailman.2063.1140201459.27775.python-list@python.org>
Message-ID: <dt58fi$rf1$1@online.de>

John Marshall wrote:

> Hi,
> 
> I am reposting this message from python-dev.
> 
> Could someone please test the code below
> to verify that there is indeed a problem
> with eval() under python 2.3.5. I have
> rebuilt python 2.3.5 under the latest debian
> and under RH 7.3 (in case the problem is
> in system libraries).
> 
> The following code causes the virtual memory
> allocation to constantly increase until there
> is no more memory left (the VIRT column of the
> 'top' utility display).

I have this leak, too in python2.3 under debian/sid:
Python 2.3.5 (#2, Nov 20 2005, 16:40:39)
[GCC 4.0.3 20051111 (prerelease) (Debian 4.0.2-4)] on linux2

python2.4 seems to be unaffected.
Python 2.4.2 (#2, Nov 20 2005, 17:04:48)
[GCC 4.0.3 20051111 (prerelease) (Debian 4.0.2-4)] on linux2

-- 
Benjamin Niemann
Email: pink at odahoda dot de
WWW: http://www.odahoda.de/


From fredrik at pythonware.com  Tue Feb 28 02:33:15 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 28 Feb 2006 08:33:15 +0100
Subject: type = "instance" instead of "dict"
References: <1141069989.763239.191140@u72g2000cwu.googlegroups.com>
	<du0nie$egt$1@daisy.noc.ucla.edu>
Message-ID: <du0ubr$4es$1@sea.gmane.org>

James Stroud wrote:

> Perhaps you did not know that you can inheret directly from dict, which
> is the same as {}. For instance:
>
> class Dict({}):
>    pass
>
> Is the same as
>
> class Dict(dict):
>    pass

it is ?

>>> class Dict({}):
...     pass
...
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: Error when calling the metaclass bases
    dict expected at most 1 arguments, got 3

</F>





From gjzusenet at gmail.com  Mon Feb 27 06:58:47 2006
From: gjzusenet at gmail.com (gjzusenet at gmail.com)
Date: 27 Feb 2006 03:58:47 -0800
Subject: Help getting started with Pycurl / libcurl ?
Message-ID: <1141041527.250110.83770@e56g2000cwe.googlegroups.com>

Hi

I just couldn't google up any docs or tutorial on how to set up
everything necessary to use pycurl on windows.

When I try running the pycurl setup I get a 'CURL_DIR' not found error,
but no where can I find a detailed explanation of what is this dir,
what dlls I need to install and where etc.

It's also somewhat confusing in the pycurl docs - do I need cURL or
libcurl??

Any help would be much appreciated.



From python.list at tim.thechases.com  Sun Feb 26 11:35:13 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Sun, 26 Feb 2006 10:35:13 -0600
Subject: wxPython: help(wx) causes segfaulting?
Message-ID: <4401D8C1.7030102@tim.thechases.com>

Trying to get my feet wet with wxPython (moving from just 
command-line apps), I tried the obvious (or, at least to me 
was obvious):

Start python, "import wx" and then do a "help(wx)" to see 
what it can tell me.

Unfortunately, it spewed back a handful of errors, gasped, 
wheezed and died semi-hideously.

It's a stock install of Python 2.3.5 on Debian (testing). 
The session has been pasted below if it's of any help.  I 
can successfully "dir(wx)" and get back all the goods. 
However, the call to help() bombs out.

I'm having trouble figuring out what went wrong in the 
matter:  it looks like "g_object_new" is failing some 
assertion test, but not knowing the internal workings of 
CPython, I'm afraid this doesn't mean much to me.  Any help 
or suggestions would be appreciated.

If it makes a difference, other wxPython apps seem to run 
just fine (particularly pyalacarte has no trouble).

Thanks,

-tkc


Python 2.3.5 (#2, Aug 30 2005, 15:50:26)
[GCC 4.0.2 20050821 (prerelease) (Debian 4.0.1-6)] on linux2
Type "help", "copyright", "credits" or "license" for more 
information.
 >>> import wx
 >>> help(wx)

(process:11000): GLib-GObject-CRITICAL **: gtype.c:2254: 
initialization assertion failed, use IA__g_type_init() prior 
to this function

(process:11000): GLib-GObject-CRITICAL **: gtype.c:2254: 
initialization assertion failed, use IA__g_type_init() prior 
to this function

(process:11000): GLib-GObject-CRITICAL **: gtype.c:2254: 
initialization assertion failed, use IA__g_type_init() prior 
to this function

(process:11000): GLib-GObject-CRITICAL **: 
g_type_add_interface_static: assertion 
`G_TYPE_IS_INSTANTIATABLE (instance_type)' failed

(process:11000): GLib-GObject-CRITICAL **: gtype.c:2254: 
initialization assertion failed, use IA__g_type_init() prior 
to this function

(process:11000): GLib-GObject-CRITICAL **: gtype.c:2254: 
initialization assertion failed, use IA__g_type_init() prior 
to this function

(process:11000): GLib-GObject-CRITICAL **: gtype.c:2254: 
initialization assertion failed, use IA__g_type_init() prior 
to this function

(process:11000): GLib-GObject-CRITICAL **: g_object_new: 
assertion `G_TYPE_IS_OBJECT (object_type)' failed
Segmentation fault






From tprimke at interia.pl  Sat Feb  4 12:51:22 2006
From: tprimke at interia.pl (TPJ)
Date: 4 Feb 2006 09:51:22 -0800
Subject: A problem with some OO code.
In-Reply-To: <pan.2006.02.04.14.34.32.494116@REMOVETHIScyber.com.au>
References: <1139055710.688193.81000@z14g2000cwz.googlegroups.com>
	<pan.2006.02.04.14.34.32.494116@REMOVETHIScyber.com.au>
Message-ID: <1139075482.510942.71640@z14g2000cwz.googlegroups.com>

At first I'd like to thank you for such a long answer.

> (...)
> You need to simplify the code as much as possible, cutting away everything
> you can, to the SMALLEST amount of code that still experiences the problem.

I understand your POV and I really appereciate your reply, but I doubt
that I could simplify my code to make it small *enough* to fit in one
post and not look too long.

BTW: is there some safety way to show long piece of code on a
group like comp.lang.python? Uploading my code to my website was the
first (and the only one...) idea I had.

> (...)
> There is very little point in showing us test code
> that works -- your problem isn't with code that works, it is with code
> that doesn't work.

You see - that's one of my problems. I'm working on my PyObject module
(it is intended to be a base for more complex systems). For now
there are no other modules, that use PyObject. So the test.py module,
that consists of some test for my module, is the *only* piece of code
that I could show you. That's all the story.

> > All you need to know is that there are four classes.
>
> No, I'm sure we need to know much more than that.

Yes, you're right. But I tried to explain my problem as easily as
possible. And (as I thought) only four classes were involved.

> > (Of course, you
> > may generate all the documentation by typing just "./make_docs". All
> > you need is Python with Epydoc installed.)
>
> Oh right, well just let me rush off and install Epydoc just for you, okay?

It was not my intention to ask you to install anything for me. I just
thought, that someone might be interested to read some documentation
about the module, that causes the problem. I think it's easier to read
documentation of more complex system, than just code.

Perhaps it's about my English (I'm still studying) - a language easy
to learn, but difficult to master. By "you may" I meant "you might, if
you'd like to (for some reasons)", not "you are expected to do it".

> > In the PyObject.py there are two classes: Object and OManager. When
> > Object wants to know if some link is safe (in another words: it wants
> > to know if some another object exists),
>
> What is a link in your application? What do you mean "another object"?
> Like an int or a string?

1) In OO vocabulary, class is something like template for an object.
But I think the word "object" has something different meaning in
Python. In general I don't use the word "object" in the same meaning,
that it is used by Python. I try to use words in the same way, that
they
are used in OO.
Sometimes I use the word "class" to talk about template (for an
object), and the word "instance" to talk about an object of some class,
but the only reason I do it is to distinguish between OO-object and
Python-object.

2) Link is something like address (like a post address). My module -
in general - is just a template of a system of objects, that are able
to communicate with each other. All that an object needs to communicate
with an another object, is the name of that another object - it's
adress
(my assumption is that the names of the objects will be unique).
"Link" to an another object is just the name of that object.

> > it calls the proper method of
> > its objects' manager (the OManager instance). Details are not important
> > here,
>
> I bet the details are absolutely vital.

Yes, they are - were. But I didn't want to describe my code in details
in my post. I suspected, that there's some stupid mistake somewhere in
my code. The truth is, all I wanted was someone else to take a look at
this code.

(BTW - I was right. My problem was caused by a spelling mistake, and
someone found it. And it made me feel very stupid, but I think I
deserved
it.)

> > so I'll just say, that if the link is safe, the objects' manager
> > calls the proper method of the object, that sent him request. This
> > method of the object just stores the information about that link (that
> > it's safe), in the so-called private field (the fields used to store
> > the information about the links are called __ls_existing_links and
> > __ls_demanded_links).
>
> This is a terribly involved way of doing it, and I'm not even sure what
> "it" is that you are trying to do. Are you trying to do some sort of
> dispatch mechanism?

My idea is as follows:
1) There's one objects' manager, that manages all the objects in some
system.
2) Every object has its unique name, and is registered with the
objects' manager.
3) When an object-sender wants to send a message to some
object-receiver, all that the object-sender has to do is to tell the
objects' manager, what's the name of the object-receiver.

The only problem is that the object-sender has no idea if the
object-receiver exists.

A situation, when object-receiver doesn't exist, shouldn't happen, but
as long as code is written by people, such a mistake can be done.
Therefore I developed a mechanism, that may prevent such a situation.

Every object-sender must create a link to the object-receiver. A link
is just the name (id) of the object-receiver. There's only one
OO-object in the system, that knows, if the object-receiver exists.
It's the objects' manager. So the object-sender "asks" its objects'
manager, if the link from that object-sender to the object-receiver is
"safe" (in another words: if the object-receiver exists). If the
object-receiver exists, the objects' manager just informs the
object-sender (that might be also called the object-requester), that
the link is safe (and can be used).

But if the object-receiver doesn't exist, the objects' manager doesn't
inform the object-requester about anything.

Now, there are two different scenarios, that might happen:

a) The object-receiver will be created - this is the desired
situation. When the object-receiver will be registered with the
objects' manager, the objects' manager will inform the
object-requester, that the object-receiver exists and the link is
safe.

b) The object-receiver won't be created. Because the object-requester
tracks all the demanded links, it knows, that not all of these links
are safe - and therefore it knows, that it's not ready to work. In the
final version of the module, the objects' manager will be able to
check, if there are any objects, that aren't ready to work. In such a
case the whole system just won't work (and it'll explain the
developer why).

It's not so complicated, and I suppose it will help me to create less
error-prone code in the future.

> I see you have a line "i = self.__ls_demanded_links.index( s_object )". It
> looks like you are storing your data in a chunk of text, and then running
> index on that text to find the bit you want to work with. If you wanted to
> do that much work, just write your script in bash and be done with it!
> Python has lists and dicts and other advanced data structures. Use them.
> You will be glad.

The reason, why a list was used in this case, is now obsolete and it
will probably change in the future.

But, in general, you're right. The dictionary would be much better in
this case even in the previous version of my module.

And... I know how great are lists, dicts and tuples. That's the reason
I threw out Java, C++ and (in most cases) C, and fell in love with
Python. In my personal opinion the adventure with Python begins in the
moment, when you realize, how easy are lists, dicts and tuples to use.
(Yes, I know, there are also sets, but I don't use them at all. So
far...)

> So Obj is an alias for Object? What's an Object? Is it the same as the
> Python built-in type "object"?
>
> But later on you say:
>
> "All these methods are the methods of the Object class (defined in
> PyObject.py), not of the Obj class (defined in test.py)."
>
> So Object and Obj are not the same.

No. I think that the declaration of the Obj class will explain
everything:

class Obj( Object ):
  ...

So the Obj class is an *extension* of the Object class. Therefore I
wrote that "Obj is just an Object". I (mis?)used the vocabulary from
OO: something may *be* a kind of something else (inheritance), or it
may *has* something else (composition). But I'm not sure about those
words; I have read many books in Polish, not in English.

> > --------------------------------------------------
> > Traceback (most recent call last):
> >   File "test.py", line 142, in test04CreateSystems
> >     system1 = System1()
> >   File "test.py", line 81, in __init__
> >     self.objA.demandNewLink( 'B' )
> >   File "/home/tpj/opt/Praca/Programy/PyObject/workdir/PyObject.py",
> > line 503, in demandNewLink
> >     s_object )
> >   File "/home/tpj/opt/Praca/Programy/PyObject/workdir/PyObject.py",
> > line 800, in _makeNewLink
> >     o_srcobj._makeLinkSafe( s_target )
> >   File "/home/tpj/opt/Praca/Programy/PyObject/workdir/PyObject.py",
> > line 608, in _makeLinkSafe
> >     self.__makeLinkSafe( s_object )
> >   File "/home/tpj/opt/Praca/Programy/PyObject/workdir/PyObject.py",
> > line 582, in __makeLinkSafe
> >     i = self.__ls_demanded_links.index( s_object )
> > AttributeError: 'Obj' object has no attribute
> > '_Object__ls_demanded_links'
>
> [snip]
>
> > Perhaps I'll explain what's going on there. First, the objects' manager
> > is created, and then also some objects are created. After doing that,
> > the object called "objA" demands a new link to the other object, called
> > "objB" (this is the line 81 in the error message above).
>
> Your description does not match what line 81 actually says. It says:
>
> self.objA.demandNewLink('B')
>
> self (an instance of System1, not Obj or Object) grabs the attribute
> called "objA", and calls its method demandNewLink with an argument of
> the string 'B', not objB an instance of Obj or Object.

It's a typo, it should be 'B' instead of "objB".

In fact, the reference to the object "B" is self.objB - I think that's
the reason for this mistake.

> If you want to work with Object instances, why not just use them instead
> of passing around strings that represent them?

Well, I *don't* want to work with any instances, therefore I intend to
give all the objects unique names.

> (...)
> Huh? Do you mean that there is a way for links (whatever they are) to be
> requested without calling demandNewLink? How would this happen?

Well - it's Python, so *anything* can be done with any so-called
private attributes. Therefore such a possibility exists.

But it's not intended to be used in such a way. In "normal" use it's
impossible to request a link without calling demandNewLink method.

Perhaps my explanation wasn't too clear.

> > All these methods are the methods of the Object class (defined in
> > PyObject.py), not of the Obj class (defined in test.py). According to
> > my knowledge about the OO programming Python should be able to realize,
> > that the so-called private fields, that are being referred from these
> > Object class methods, are the private fields of the *Obj class
> > instance*, not of the *Object class one*.
>
> Some serious confusion here.
>
> What are fields? Do you mean attributes? I'm going to assume that you do.
>
> Would it help if I told you that Python doesn't have private attributes?
> It *simulates* private attributes using name mangling.

1) "Fields" - yes, I think I should have written attributes. Sorry for
that, my problem is that the only books about OO that I have read were
in Polish, so my vocabulary might be incorrect.

In general, every object has methods (functions, procedures, etc.) and
- I think - attributes (variables).

2) I know that Python has no private *anything*, and therefore I
called it "so-called private".

> (...)
> PLEASE don't bother to tell us how Python sucks because it doesn't have
> "real private attributes", we've heard the arguments (and the abuse) fifty
> times before.

Python's not sucks, I find it the best programming language in the
world. It suits all my needs.

Believe me or not, but I have argued for Python to be (one of) the
best language(s) to write OO applications. Since I have started coding
in
Python, I found that the idea of private, protected and public
attributes/methods may be as well the matter of *convention*, as real
*mechanism*.

Anyway, I don't find Python inferior to any other OO language just
because Python have no *real* private methods/attributes.

So, I think, we're both on the same side.

> (...)
>
> Good. Now how about getting a simple program that demonstrates your
> problem?
>
> (...)
>
> Do you enjoy all this make-work, writing tedious methods to get or set or
> print attributes? I suggest you ditch all the private attributes and just
> make them public. You've already spent three days hitting your head
> against a brick wall because of excessive data-hiding. Was it worth it?
> Python is a language that encourages the attitude "We're all adults here"
> -- getters/setters are discouraged.

Maybe I'll make it clear: I wrote this simple example to show *myself*,
that I'm not out of my mind. It was supposed to be *very* simple. I
just
wanted to check, if I'll be able to change the so-called private
attribute declared in the A class by calling a method declared in
another class. That's all. I think that if I hadn't done it, I would
have started to doubt, that 2 + 2 = 4.

Why I did such a obvious test? Because I thought that it was my
problem in the PyObject module: the need to change a so-called private
attribute declared in the class Object by calling a method of another
class (an instance of another class, to be precise).

> (...)
>
> The call to A.__init__ creates an attribute __a to self. Remember, self is
> an instance of B (not A). Apply the name-mangling rules, which are applied
> at compile time: the code in A's method mangles __a to _A__a. So
> A.__init__ creates an attribute _A__a in B's namespace. So B has two
> attributes, _A__a and _B__b.
>
> (...)
>
> (However, that is not your problem.)

So it works just as it's supposed to work.

All right, now I'm OK. My madness has gone.

> (...)
>
> Here is your exception again:
>
> (...)

Well, I decided to cut out all the rest - because (I think) it has
nothing to do with my code - and therefore with my problem.

Once again - thank you for such a long and thorough answer. Once again
- sorry for some mistakes that I made in my first message, especially
for those "fields" (I feel really silly now). I wrote the first
message in the state of madness, after spending *three* days on
analysis of my code, without any progress. I was very frustrated, and
my explanations could be incomprehensible.



From donn at drizzle.com  Mon Feb 20 01:01:22 2006
From: donn at drizzle.com (Donn Cave)
Date: Mon, 20 Feb 2006 06:01:22 -0000
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<mailman.2132.1140378051.27775.python-list@python.org>
	<yfs7j7roth2.fsf@oc.ex.ac.uk>
Message-ID: <1140415281.679774@jetspin.drizzle.com>

Quoth Alexander Schmolck <a.schmolck at gmail.com>:
| "Fredrik Lundh" <fredrik at pythonware.com> writes:
...
|> the only even remotely formal definition I've ever seen is "language with
|> designed to script an existing application, with limited support for handling
|> its own state". 
|
|> Early Tcl and JavaScript are scripting languages, Python is not.
|
| Right. Which shows that by this definition scripting language is not a
| meaningful and useful concept. No one will understand you correctly when you
| refer to "scripting language" and mean only something like the above -- and
| unless you spend a lot of your time talking about early tcl and early
| javascript I doubt you'd need a word for it, either.

Oddly enough, that's what I understand it to mean, too, so you can't
strictly say "no one".

On the other hand, I think it's obvious that a language like Python could
be used for scripting, without having been specifically designed for it as
described above.  There's an ambiguity in the phrase, out of context -
I can say "Python can serve as a scripting language for some applications",
but not "Python is a scripting language!", since its place in the taxonomy
of languages would be somewhere else.

	Donn Cave, donn at drizzle.com


From python at rcn.com  Fri Feb 17 06:06:43 2006
From: python at rcn.com (Raymond Hettinger)
Date: 17 Feb 2006 03:06:43 -0800
Subject: Add a month
References: <1140173540.686250.205760@g44g2000cwa.googlegroups.com>
Message-ID: <1140174403.681691.256450@g14g2000cwa.googlegroups.com>

[novin01 at gmail.com]
> Hi, this is probably a really simple question but...
> How do you add a month to a datetime date in python? It would be nice
> if  you could do something like:
>
> d = datetime.date(2006,2,17)
> dm = datetime.timedelta(months=1)
> d_new = d + dm
>
> but timedelta doesn't have a 'months' setting. Am I missing some easy
> method or do I have to code a work around myself??

You need to code you own version.

It was not included with datetime.timedelta() because the definition is
ambiguous (i.e. what date is one month after Jan 30th?).


Raymond



From pmartin at snakecard.com  Thu Feb 23 21:29:00 2006
From: pmartin at snakecard.com (Philippe Martin)
Date: Thu, 23 Feb 2006 20:29:00 -0600
Subject: Python stdout and Win 2003
Message-ID: <MbuLf.18349$2c4.6292@dukeread11>

Hi,

I have a program at a customer's site that seems to have random problem
which eventually come down to not being able to read/write from serial
ports.

I trapped all the exceptions I could think of and all of them look like
this:
***********************************
(ACCESS CONTROL)Fri, 24 Feb 2006 02:07:18 +0000 : Traceback (most recent
call last):
  File "C
\Python24\lib\site-packages\SC\readers\SC_IDTech_MiniSmart_RS232.py", line
308, in Is_Card_Inserted
    print 'CARD NOT INSERTED'
IOError: [Errno 9] Bad file descriptor
***********************************

To me that means the print failed ... that stdout was not available anymore.

Am I correct? .... what could cause this.


Many thanks.

Philippe









From lycka at carmen.se  Fri Feb 24 05:45:04 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 24 Feb 2006 11:45:04 +0100
Subject: ls files --> list packer
In-Reply-To: <1140768527.006363.29050@i39g2000cwa.googlegroups.com>
References: <1140765792.864556.289820@i40g2000cwc.googlegroups.com>
	<1140767111.490691.42460@e56g2000cwe.googlegroups.com>
	<1140768527.006363.29050@i39g2000cwa.googlegroups.com>
Message-ID: <dtmo3g$jg5$1@wake.carmen.se>

kpp9c wrote:
> that other sillyness i mentioned is not strickly required  ... just
> dreaming but i know involves some kind of os walk type thing prolly ...

os.walk isn't exactly rocket science... Something similar to this?

 >>> import os
 >>> for dir, dirs, files in os.walk('.'):
...     txt_files = [x for x in files if x.endswith('.txt')]
...     if txt_files:
...         print dir, txt_files


From fredrik at pythonware.com  Sun Feb 19 21:55:09 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 20 Feb 2006 03:55:09 +0100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com><yfspsljp321.fsf@oc.ex.ac.uk><mailman.2131.1140377578.27775.python-list@python.org>
	<yfsbqx3ov29.fsf@oc.ex.ac.uk>
Message-ID: <dtbb2j$fga$1@sea.gmane.org>

Alexander Schmolck wrote:

> My point was that Guido probably (and fortunately!) was unaware of the extent
> to which you can have both dynamism and speed

any my point was that chosing to ignore something doesn't mean
that you're ignorant.

(but since you keep repeating this nonsense, it's clear that you're
pretty ignorant wrt. software design.  too much CS exposure?).

</F>





From grante at visi.com  Mon Feb  6 15:56:42 2006
From: grante at visi.com (Grant Edwards)
Date: Mon, 06 Feb 2006 20:56:42 -0000
Subject: Accessing Windows Serial Port
References: <1139253898.601680.265220@g44g2000cwa.googlegroups.com>
Message-ID: <11ufe0agltktg7d@corp.supernews.com>

On 2006-02-06, George T. <georgetoffer1 at yahoo.com> wrote:

> I need to access the serial port via python on a windows machine.
> Reading on the web, there are three solutions:  pyserial, siomodule and
> USPP.

You can also just use win32 stuff directly (CreateFile et al).

> pyserial seems to be the best option since the other two are
> tested with Windows 95 and older versions of python.  Would you agree
> with this or have I missed an option?

I've used PySerial and win32 system calls.  I've never used the
other two.  Try pyserial first.  If you need lower level
control than that gives you, use win32 calls.

> Can anyone provide me an example of how to access the serial port with
> pyserial?

http://pyserial.sourceforge.net/

-- 
Grant Edwards                   grante             Yow!  Is this "BOOZE"?
                                  at               
                               visi.com            


From joao.macaiba at gmail.com  Wed Feb  8 10:01:38 2006
From: joao.macaiba at gmail.com (Joao Macaiba)
Date: Wed, 08 Feb 2006 13:01:38 -0200
Subject: Undergraduate project :: python ToDo list
Message-ID: <43EA07D2.4090108@gmail.com>

Hi.

I would like to know if there's any todo list on python project.

My interest in doing a undergraduate project.

It could be anything in the python core interpreter. I program C/C++.


Thanks in advance.

Regards.
Joao Macaiba (wavefunction)


From pprobert at wisc.edu  Thu Feb 23 17:00:40 2006
From: pprobert at wisc.edu (Paul Probert)
Date: Thu, 23 Feb 2006 16:00:40 -0600
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <43FE2A14.5070609@benjiyork.com>
References: <dtl9ad$35h$1@sea.gmane.org> <43FE2A14.5070609@benjiyork.com>
Message-ID: <dtlba8$asj$1@sea.gmane.org>

Benji York wrote:

>Paul Probert wrote:
> > Hi, My app runs in a loop looking for changes in a database, and like
> > a good boy I call time.sleep(1) inside the loop. Unfortunately this
> > sometimes runs for 200 seconds or so, presumably while my OS is
> > calling Bill Gates to tell him what I've been doing. This happens
> > under NT4, W2k, and XP. What do people do to fix this? Thanks!
>
> From the docs for time.sleep:
>
>     The actual suspension time may be less than that requested because
>     any caught signal will terminate the sleep() following execution of
>     that signal's catching routine. Also, the suspension time may be
>     longer than requested by an arbitrary amount because of the
>     scheduling of other activity in the system.
>--
>Benji York
>  
>
Benji,
   Thanks, but yes, I had read that before posting. One would think, 
though, that the extra 200 seconds is a bit extreme to be blamable on 
system scheduling granularity.
   I'm starting to think we've got a worm of some kind. If so, its 
invisible to our Norton AV corporate.

Paul Probert
University of Wisconsin



From jgardner at jonathangardner.net  Fri Feb 24 19:22:07 2006
From: jgardner at jonathangardner.net (Jonathan Gardner)
Date: 24 Feb 2006 16:22:07 -0800
Subject: Playing with modules
In-Reply-To: <1140808435.311458.86770@z34g2000cwc.googlegroups.com>
References: <1140808435.311458.86770@z34g2000cwc.googlegroups.com>
Message-ID: <1140826926.993654.188640@j33g2000cwa.googlegroups.com>

You're going to have to create the home.base module somewhere. If you
want to put in that some code that basically imports another module's
namespace into the home.base module's namespace, then that may do what
you want.



From jdhmistey at gmail.com  Thu Feb 16 20:49:50 2006
From: jdhmistey at gmail.com (jdhmistey at gmail.com)
Date: 16 Feb 2006 17:49:50 -0800
Subject: Pyserial never read
In-Reply-To: <1140105936.408387.88130@z14g2000cwz.googlegroups.com>
References: <1140105936.408387.88130@z14g2000cwz.googlegroups.com>
Message-ID: <1140140990.492289.185060@g47g2000cwa.googlegroups.com>

I don't know alot about python but I could help you with english?
eventhough it was really good

best regards-
Just



From steve at holdenweb.com  Mon Feb 13 16:54:50 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Feb 2006 16:54:50 -0500
Subject: Pulling all n-sized combinations from a list
In-Reply-To: <1139861618.098084.250350@g14g2000cwa.googlegroups.com>
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>	<1139509392.890581.94470@g43g2000cwa.googlegroups.com>	<mailman.1675.1139510184.27775.python-list@python.org>	<1139513265.440321.184530@o13g2000cwo.googlegroups.com>	<dsg601$ndh$1@wake.carmen.se>	<1139527129.367077.316590@g44g2000cwa.googlegroups.com>	<dshvoq$ksm$1@wake.carmen.se>	<1139601545.595021.201610@g44g2000cwa.googlegroups.com>	<dsphts$3a3$1@wake.carmen.se>
	<1139861618.098084.250350@g14g2000cwa.googlegroups.com>
Message-ID: <dsqv76$8fi$4@sea.gmane.org>

mensanator at aol.com wrote:
> Magnus Lycka wrote:
> 
>>mensanator at aol.com wrote:
>>
>>>But it turns out he actually had one, which he graciously provided
>>>in response to my observation. If I had kept my trap shut, I wouldn't
>>>have it, would I?
[...]
> And, strange as it may seem, asking questions the
> smart way is sometimes less effective than being a
> smartass. Given a chance to say
> 
>   idiot, you're wrong and here's why...
> 
> people will jump all over you. Take this thread,
> for example. Of course, if they just call you an idiot
> then you haven't gained anything.
> 
> But there's nobody like that on comp.lang.python, right?
> 

Of course not, you idiot :-)

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From keith.b.perry at gmail.com  Tue Feb 21 10:32:19 2006
From: keith.b.perry at gmail.com (kbperry)
Date: 21 Feb 2006 07:32:19 -0800
Subject: Zope/Plone - Is it the right solution?
In-Reply-To: <mailman.2236.1140534872.27775.python-list@python.org>
References: <1140532818.195281.316580@g44g2000cwa.googlegroups.com>
	<mailman.2236.1140534872.27775.python-list@python.org>
Message-ID: <1140535939.444599.30350@g43g2000cwa.googlegroups.com>

Well,
I guess our main goal in this class is to improve usability and user
experiences at the site.

While we want to improve our site visually and make it more usable to
the prospective students, the site needs to be easily updated.  I don't
think that I am looking for a wiki.

I will definitely check out Django and turbogears.

Thanks a ton for the info!



From aleaxit at yahoo.com  Mon Feb 20 16:39:24 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 20 Feb 2006 13:39:24 -0800
Subject: Quesion about the proper use of __slots__
References: <1140424508.393412.79140@o13g2000cwo.googlegroups.com>
	<43f9825e$0$4777$636a55ce@news.free.fr>
	<1140426860.033363.237150@o13g2000cwo.googlegroups.com>
	<1hb1vq2.1ij7f8e1bx24u8N%aleaxit@yahoo.com>
	<mailman.2180.1140470100.27775.python-list@python.org>
Message-ID: <1hb28j3.1wgv4b2a54odpN%aleaxit@yahoo.com>

Peter Hansen <peter at engcorp.com> wrote:

> Alex Martelli wrote:
> > Zefria <zefria at gmail.com> wrote:
> >    ...
> >>this special case I'm expecting each "carrier" to have up to 150
> >>fighters, and 3 to 5 carriers for each of the two teams, which comes
> >>out to be quite large.
> > 
> > The problem with the spread of email is that it reduces the number of
> > envelopes laying around, and thus makes it harder to do "back of the
> > envelopes" calculations (the key skill in engineering...).
> 
> Actually, a properly performed "engineering approximation" is done 
> entirely in one's head, preferably without resorting to calculation at
> all.

Of course, but you still need an envelope on whose back to scribble.
Tradition and historical continuity demand it.

> The "back of the envelope" ploy is reserved for cases where one is 
> trying to impress a waitress (which effort is inevitably doomed to fail
> of course), or to make it easier to submit the dinner receipt as a 
> business expense...

That's "back of the restaurant bill", a different though related
technique.  Since most restaurants don't print bills on envelopes, the
two are not really comparable.


Alex


From arutz at mimoza.pantel.net  Thu Feb  2 16:19:05 2006
From: arutz at mimoza.pantel.net (Antal Rutz)
Date: Thu, 02 Feb 2006 22:19:05 +0100
Subject: Collecting snmp data - threads, processes, twisted?
Message-ID: <43E27749.6010701@mimoza.pantel.net>

Hi all,

I'd like to collect snmp data from varoius network devices parallel.

First I tried with my own threadpool class then I gave a try
to Christopher Arndt's threadpool.py
(http://chrisarndt.de/en/software/python/threadpool.html).

I got the same result: with one thread it finished about 2 mins
with more threads it needed more and more time.

Maybe I ran into the situation where threads aren't the best.
I use yapsnmp (fair easy to 'snmpwalk') for collecting.
it uses net-snmp.

Could you give me some advice how can I make my script really parallel?

My options maybe:
1. pySNMP (as it's full in python)
2. subprocess (I'd like to make (find) a solution as threadpool.py)
    (running yapsnmp, pySNMP or even net-snmp?...)
3. TwistedSNMP (seems too weird for me.. cannot imagine a simple
solution for my problem)
4. ...

thanks for your help

-- 


--arutz



From cyril.bazin at info.unicaen.fr  Tue Feb 28 07:42:31 2006
From: cyril.bazin at info.unicaen.fr (Cyril Bazin)
Date: Tue, 28 Feb 2006 13:42:31 +0100
Subject: PEP 354: Enumerations in Python
In-Reply-To: <1141125265.118619.36500@i40g2000cwc.googlegroups.com>
References: <87accdplbj.fsf@rose.polar.local>
	<1141109451.570616.86140@p10g2000cwp.googlegroups.com>
	<mailman.2505.1141118380.27775.python-list@python.org>
	<1141125265.118619.36500@i40g2000cwc.googlegroups.com>
Message-ID: <a10b8d620602280442r2e48bbaet38317223f9e7c2fb@mail.gmail.com>

What about that?

SomeNumbers = enum('0', '1', '2', '3', '4', '5', '6', '7')

or

Rooms = enum('1bed', '2beds', 'moreThan2beds')

or even

Comments = enum('#', ';', '//')


Cyril

On 28 Feb 2006 03:14:25 -0800, Carl Banks <invalidemail at aerojockey.com>
wrote:
>
> Stefan Rank wrote:
> > on 28.02.2006 07:50 Carl Banks said the following:
> > > Ben Finney wrote:
> > >> This PEP specifies an enumeration data type for Python.
> > >
> > [snip]
> > >
> > > Here's why I think it's not too useful to begin with: the benefits of
> > > the enum you describe here are pretty weak.
> >
> > I need to disagree heavily here :)
>
> "the benefits of the enum you describe here [beyond my example which I
> claimed enum was only a minor improvement over] are pretty weak."
>
>
> > > It's a pretty weak case to have a dedicated builtin to prevent
> > > duplicates in something that changes maybe once a month, as enums tend
> > > to change rather slowly.  (At least, that's the way enums in other
> > > languages are used, and the design you present here seems to suggest
> > > you intend to use them that way as well.)  And frankly, a unit test or
> > > assertion could check this.
> > [snip]
> >
> > I don't understand what you mean by 'change rather slowly'?
>
> Construct data structure on-the-fly from an XML file edited by multiple
> people every day  = changes rather quickly
>
> Construct data structure from a Python file that was last edited a year
> and a half ago = changes rather slowly
>
> Typically, enums fall into the latter category.  You set the enum
> values, and then pretty much leave them alone, adding new values only
> occasionally.  (Come on, how often do the days of the week change?)
> All I was saying is, changes to the enum values are infrequent enough
> that having a special type just to make sure there are no duplicates is
> a waste.  The only justification for a built-in enum is the other stuff
> you mentioned.
>
>
> > One thing that is probably missing to allow this, is a enum-set-creation
> > with the | operator::
> >
> >    Weekdays = enum('mon', 'tue', 'wed', 'thu', 'fri', 'sat', 'sun')
> >    daysihate = Weekdays.mon | Weekdays.thu
> >
> > (and this discussion needs to move to python-dev ?)
>
> What's wrong with set((Weekdays.mon,Weekdays.thu))?  Explicit is better
> than implicit.
>
>
> > As for the metaclass versions: For myself, the above version feels more
> > natural and straightforward (in the same way as the PEP author describes
> > it), though I understand the subclassing ideas.
> >
> > But are there use cases for subclassing, that aren't better served with
> > a new enum or something homegrown?
> > Can C++/Pascal/Java enums be subclassed?
>
> In C++, enum is a type but not a class.  Same thing with Ada.  Java
> didn't have enums last time I checked.  Don't know about Pascal.  I
> didn't care too much about subclassing; I just thought different enum
> constant that couldn't (or, rather, oughtn't) be compared probably
> should be instances of a separate class.  It doesn't matter much,
> though.
>
> Should something like this work:
>
> day = Weekdays.mon
> isinstance(day,Weekdays)
>
> ?
>
>
> Carl Banks
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From michele.petrazzo at TOGLIunipex.it  Wed Feb 22 13:27:55 2006
From: michele.petrazzo at TOGLIunipex.it (Michele Petrazzo)
Date: Wed, 22 Feb 2006 19:27:55 +0100
Subject: PyUNO with different Python
In-Reply-To: <mailman.2306.1140622912.27775.python-list@python.org>
References: <mailman.2306.1140622912.27775.python-list@python.org>
Message-ID: <43fcad29$0$29099$5fc30a8@news.tiscali.it>

? wrote:
> Hi! maybe somebody can give me an hint to my problem setting up PyUNO
> on my Mac to work with my Python not the Python delivered with
> OpenOffice. As said in installation instructions I've set 
> OPENOFFICE_PATH="/usr/lib/openoffice/program" export
> PYTHONPATH="$OPENOFFICE_PATH" export
> LD_LIBRARY_PATH="$OPENOFFICE_PATH" according to my environment.
> 
> importing uno gives me this error:
> 
>>>> import uno
> Traceback (most recent call last): File "<stdin>", line 1, in ? File
> "/Applications/OpenOffice.org 
> 2.0.app/Contents/openoffice.org2.0/program/uno.py", line 37, in ? 
> import pyuno ImportError: No module named pyuno
> 
> which means python finds uno but not pyuno (pyuno.dylib).
> 

Do you want to use system python inside OOo (inside a macro, or...), or
system python outside OOo?

For the first, follow this:
http://udk.openoffice.org/python/python-bridge.html#replacing

for the second:
http://udk.openoffice.org/python/python-bridge.html#modes

> Any hints? Regards, Katja

Michele


From scott.daniels at acm.org  Wed Feb 22 20:05:47 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Wed, 22 Feb 2006 17:05:47 -0800
Subject: What's up with this code?
In-Reply-To: <1140649331.924736.128420@g43g2000cwa.googlegroups.com>
References: <1140649331.924736.128420@g43g2000cwa.googlegroups.com>
Message-ID: <43fd08cf$1@nntp0.pdx.net>

Gregory Petrosyan wrote:
> Hello, it's me again.
> I am trying to optimise small module for working with polynomials, and
> I have encountered problem: new, optimised, code, doesn't work in some
> specific case. Here's the old version of the code:
> 
> (3x^2 + 2x + 1  <=>  poly([3, 2, 1]), btw)
> 
>     def __add__(self, other):
>         "Return sum of two polynomials"
>         rcoefs1 = list(reversed(self.coefs))
>         rcoefs2 = list(reversed(other.coefs))
>         coefs = [c1+c2 for c1,c2 in zip(rcoefs1, rcoefs2)]
>         minlen = min(len(rcoefs1), len(rcoefs2))
>         coefs.extend(rcoefs1[minlen:] + rcoefs2[minlen:])
>         return Polynomial(reversed(coefs))
> 
> Here's the new version:
> 
>     def __add__(self, other):
>         rcoefs1 = reversed(self.coefs)
>         rcoefs2 = reversed(other.coefs)
>         coefs = [c1+c2 for c1,c2 in it.izip(rcoefs1, rcoefs2)]
>         coefs.extend(it.chain(rcoefs1, rcoefs2)) #? -- here is magic
>         if coefs[-1] != 0:
>             return Polynomial(reversed(coefs), False, False)
>         else:
>             return Polynomial(reversed(coefs), False)
> 
> Last four lines are ok (tested), "magic" seems to occure in #? line.
> What's the magic? Here it is:
> 
> poly([1,2,1]) + poly([1,-2,1]) is ok,
> poly([1,-2,1]) + poly([5,4,3,2,1]) is ok,
> poly([1]) + poly([2]) is ok,
> poly([1,2,1]) + poly([5,4,3,2,1]) is ok, but
> 
> poly([1,0]) + poly([-1])  gives poly([-1]),
> poly([1,-3]) + poly([-2]) gives poly([-5]) etc.
> 
> "magic" happens when processing something like poly([a,b]) +
> poly([c]) and it gives poly([b+c]) as result. Can anybody help me with
> it?

OK, the trick is to think about how zip/izip _must_ work.
When the first list runs out first it stops.  When the
second list runs out, it has already read ahead one element
of the first list.

      def __add__(self, other):
          shorter = reversed(self.coefs)
          longer = reversed(other.coefs)
          if len(self.coefs) > len(other.coefs):
              shorter, longer = longer, shorter  # insure shorter first
          coefs = [c1+c2 for c1,c2 in it.izip(shorter, longer)]
          if len(self.coefs) == len(other.coefs):
              while coefs and coefs[-1] == 0:
                  coefs.pop()
          else:
              coefs.extend(longer)
          ...

--Scott David Daniels
scott.daniels at acm.org


From fraca7 at free.fr  Tue Feb 21 09:33:17 2006
From: fraca7 at free.fr (fraca7)
Date: Tue, 21 Feb 2006 15:33:17 +0100
Subject: Mutable numbers
In-Reply-To: <dteele$9pi$1@home.itg.ti.com>
References: <dteele$9pi$1@home.itg.ti.com>
Message-ID: <43fb2462$0$3211$636a55ce@news.free.fr>

Suresh Jeevanandam a ?crit :
> # I am new to python.
> 
> In python all numbers are immutable. This means there is one object ( a 
> region in the memory ) created every time we do an numeric operation. I 
> hope there should have been some good reasons why it was designed this way.

The memory allocation for integers is optimized. 'Small' integers 
(between -5 and 100 IIRC) are allocated once and reused. The memory for 
larger integers is allocated once and reused whenever possible, so the 
malloc() overhead is negligible.


From felipe.lessa at gmail.com  Tue Feb 14 20:38:27 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Tue, 14 Feb 2006 23:38:27 -0200
Subject: Soduku
In-Reply-To: <1139967167.960780.171360@o13g2000cwo.googlegroups.com>
References: <1139967167.960780.171360@o13g2000cwo.googlegroups.com>
Message-ID: <1139967507.22163.18.camel@kenshin>

Em Ter, 2006-02-14 ?s 17:32 -0800, Jonathan Gardner escreveu:
> So, one more story on why Python is really good. I think, at least with
> 2.4, we should start bragging about Python's speed. I mean, it beats
> Java AND perl!

Maybe the other implementations also have errors? Well, I'm not saying
Python is worse than them, I'm just trying to be fair. Besides, puzzles
can't say if one is better than the other, they're completely out of the
reality of most programs.

Just my two cents,
Felipe.

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From lycka at carmen.se  Wed Feb  8 11:06:16 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 08 Feb 2006 17:06:16 +0100
Subject: 450 Pound Library Program
In-Reply-To: <1139411880.032250.181300@g43g2000cwa.googlegroups.com>
References: <1139351498.090768.82270@o13g2000cwo.googlegroups.com>
	<43e9f1e1$0$612$636a15ce@news.free.fr>
	<1139411880.032250.181300@g43g2000cwa.googlegroups.com>
Message-ID: <dsd4to$umq$1@wake.carmen.se>

plahey at alumni.caltech.edu wrote:
> Ok,
> 
> I give up. DRY = Don't Repeat Yourself (google Pragmatic Programmers)
> but SPOT?  Google is little help here, SPOT is too common a word.

The only SPOT I worked with (as I know of) was SPOT4
(Le Systeme Pour 'l Observation de la Terre) but that's
probably not it...

Single Point Of Truth? It seems some claim that DRY and
SPOT are the same things.
http://www.artima.com/cppsource/reducepnp3.html


From timr at probo.com  Sat Feb 11 01:23:52 2006
From: timr at probo.com (Tim Roberts)
Date: Sat, 11 Feb 2006 06:23:52 GMT
Subject: by reference
References: <mailman.1681.1139517426.27775.python-list@python.org>
	<1139598954.259297.74290@o13g2000cwo.googlegroups.com>
Message-ID: <em0ru1pr9ucr7adc6ql2d5imrk9alu7uau@4ax.com>

"dirvine" <irvine.david at gmail.com> wrote:
>
>Thanks but I am a bit unsure as to what error I have made by posting
>this question. I am not trying to be funny but can you give me a
>pointer to the issue.

The problem is that your question is quite unclear.  I suggest that you
post your exact Python code, with the results you get, and the results you
expect.  That's usually enough!
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From mayyash at gmail.com  Thu Feb 16 02:21:09 2006
From: mayyash at gmail.com (fileexit)
Date: 15 Feb 2006 23:21:09 -0800
Subject: How to run shell commands within python
Message-ID: <1140074469.258382.24620@f14g2000cwb.googlegroups.com>

How can I execute shell commands from within python.  Specifically, I
am looking for something like the shell "cat".  But this also made me
wonder how to execute shell commands anyway, just if i needed to do
that in the future.



From malvert at telenet.be  Tue Feb  7 11:21:08 2006
From: malvert at telenet.be (malv)
Date: 7 Feb 2006 08:21:08 -0800
Subject: Dual Core outlook
Message-ID: <1139329268.695421.191340@g47g2000cwa.googlegroups.com>

Multiprocessing has been pushed into the field as the chip
manufacturers can no longer deliver as they were used to for many
years.
The general public has been conditioned to believe that 1 + 1 = 2 but
this is in fact not that simple.
Although software manufacturers can with some effort adapt packages to
exploit these dual core architectures, the same is not true for other
development work were no large distribution of the application  is to
take place.
What is the outlook for programming languages in general?
Of course, multiprocessing has been used for many years but this always
involved a much higher level of sophistication on the part of the
designers. This point seems to be largely hidden from the public,
ignorant and semi-ignorant, by the chip manufacturers.
Will new languages see the light rendering the spreading of
applications over many processors quasi transparent?
What is the outlook for Python? Would Ironpython with .net do better?
What about talk by the Java lobby that Java would be very much suited
for taking advantage of dual-core? Is there any thruth to this?

These are questions that many Python users like myself would like to
find some answers for. One thing is clear. The old days will never come
back and the processor multiplication is likely to increase.
malv



From gaz082 at gmail.com  Thu Feb 23 08:40:45 2006
From: gaz082 at gmail.com (Gaz)
Date: 23 Feb 2006 05:40:45 -0800
Subject: No (and a meaningless subject here too!)
In-Reply-To: <4tjqv1dnpv80m1k412ecjmsncqgsv8quik@4ax.com>
References: <1140534490.873612.64280@g47g2000cwa.googlegroups.com>
	<dtfhv7$css$1@sea.gmane.org>
	<mailman.2265.1140551970.27775.python-list@python.org>
	<1140619645.303344.317890@g14g2000cwa.googlegroups.com>
	<j-x*9gY-q@news.chiark.greenend.org.uk>
	<1140629467.849254.285410@g43g2000cwa.googlegroups.com>
	<4tjqv1dnpv80m1k412ecjmsncqgsv8quik@4ax.com>
Message-ID: <1140702045.812136.104980@g43g2000cwa.googlegroups.com>

Aye, but i dont need to run an FTP daemon every time i want to upload
an image to Imageshack or any other website.

About the topic name, yes, it's meaningless and its a shame. I fucked
it up when typing the title =P



From deets at nospam.web.de  Wed Feb 15 12:07:37 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 15 Feb 2006 18:07:37 +0100
Subject: Embedding a binary file in a python script
References: <1140021879.698353.324230@o13g2000cwo.googlegroups.com>
	<f5n6v1h020td0rkf2p6tiq63ck63sii0o1@4ax.com>
	<1140022952.353744.323780@g47g2000cwa.googlegroups.com>
Message-ID: <45h5gfF6nohpU1@uni-berlin.de>

mrstephengross wrote:

> Ok, this is a neat idea... The uu module deals with files though, not
> strings. Is there a way in python to make a string act like a file
> handle?

(c)?StringIO

Diez


From grante at visi.com  Thu Feb  9 10:27:02 2006
From: grante at visi.com (Grant Edwards)
Date: Thu, 09 Feb 2006 15:27:02 -0000
Subject: Best way of finding terminal width/height?
References: <96nFf.43896$d5.199922@newsb.telia.net>
	<11uc3dohfitotc5@corp.supernews.com>
	<jysFf.155352$dP1.513537@newsc.telia.net>
	<11udc0r2bq11042@corp.supernews.com> <43E719EE.3040401@gmail.com>
	<11ueq4nhn91qm91@corp.supernews.com> <43E8659D.6010101@gmail.com>
	<11uhcjj2p10mm0d@corp.supernews.com> <43E8D4DD.7040904@gmail.com>
	<11uhodjciifej02@corp.supernews.com>
	<dscfcv$t5i$1@news.lysator.liu.se>
	<11uk67a4ao5efe6@corp.supernews.com>
	<dset15$hfq$1@news.lysator.liu.se>
Message-ID: <11umnq61kf9m5f3@corp.supernews.com>

On 2006-02-09, Joel Hedlund <joel.hedlund at gmail.com> wrote:
>> It didn't insert an EOF, it just caused read() to return
>> "prematurely".  You should call read() again until it receives
>> a _real_ EOF and returns ''.
>
> Copy that. Point taken.
>
>> There appear to be a couple problems with this description:
>>
>>  1) It says that read() in blocking mode without a size
>>     parameter it will read until EOF.  This is not what happens
>>     when reading a terminal that receives SIGWINCH, so you're
>>     right: read() it isn't working as described.
>>
>>  2) It also says that it makes sense to continue to read a tty
>>     after you get an EOF.  That's not true.  Once you get an
>>     EOF on a tty, there's no point in reading it any more:
>>     you'll continue to get an EOF forever.

I should qualify comment 2) with the disclaimer that that's how
tty devices on Unix/Linux work -- I don't know about windows.

> Should I post a bug about this?

Sure.  I was going to do that yesterday, but I realized that I
didn't know how/where to do it.  I assume there's a link
somewhere at www.python.org, but I haven't had a chance to look
yet.

-- 
Grant Edwards                   grante             Yow!  I wish I was on a
                                  at               Cincinnati street corner
                               visi.com            holding a clean dog!


From markscala at gmail.com  Sun Feb 19 15:27:39 2006
From: markscala at gmail.com (markscala at gmail.com)
Date: 19 Feb 2006 12:27:39 -0800
Subject: Countdown Timer
In-Reply-To: <1140378968.362832.250720@g47g2000cwa.googlegroups.com>
References: <1140378968.362832.250720@g47g2000cwa.googlegroups.com>
Message-ID: <1140380858.958124.68200@g47g2000cwa.googlegroups.com>

take a look at the time module.



From larry.bates at websafe.com  Mon Feb 20 10:20:57 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 20 Feb 2006 09:20:57 -0600
Subject: Tab Character?
In-Reply-To: <1140298494.225985.103510@g47g2000cwa.googlegroups.com>
References: <1140298494.225985.103510@g47g2000cwa.googlegroups.com>
Message-ID: <YJWdnXhVv-OnQ2TenZ2dnUVZ_s6dnZ2d@comcast.com>

tbonejo at gmail.com wrote:
> How do I make a tab character in code to split a line read with tabs in
> it?
> 
> 
> Thanks.
> 
> Tom
> 
You should also take a look at csv module.  If you are reading lines
that contain tab delimeted data the csv module can make splitting very
easy.

-Larry Bates


From duncan.booth at invalid.invalid  Mon Feb 13 16:25:34 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 13 Feb 2006 21:25:34 GMT
Subject: trapping errors in function call syntax
References: <m8m1v1h8ae545nsqbl777plviddc94vsdd@4ax.com>
	<mailman.1850.1139858603.27775.python-list@python.org>
Message-ID: <Xns9769D9EFB80duncanbooth@127.0.0.1>

Fredrik Lundh wrote:
> Avi Kak wrote:
>> Suppose I write a function that I want to be called
>> with ONLY keyword argumnts, how do I raise an
>> exception should the function get called with
>> what look like position-specfic arguments?
> 
> here's one way to do it:
> 
>>>> def func(*args, **kw):
> ...     def myrealfunc(a=1, b=2, c=3):
> ...             print a, b, c
> ...     if args:
> ...             raise TypeError("invalid call")
> ...     return myrealfunc(**kw)
> ...
> 

If you aren't particular about the message then you can do without the args 
argument and just define it with **kw:

>>> def func(**kw):
     def myrealfunc(a=1, b=2, c=3):
             print a, b, c
     return myrealfunc(**kw)

    
>>> func(1)

Traceback (most recent call last):
  File "<pyshell#14>", line 1, in -toplevel-
    func(1)
TypeError: func() takes exactly 0 arguments (1 given)
>>> func(a=3)
3 2 3
>>> 

and if you are particular about the message perhaps submitting a patch to 
generate a more appropriate message would be a good idea.


From onurb at xiludom.gro  Wed Feb  8 04:31:17 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Wed, 08 Feb 2006 10:31:17 +0100
Subject: Too Many if Statements?
In-Reply-To: <1139384021.290153.120470@g14g2000cwa.googlegroups.com>
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<dsaqkj$jhm$1@xenon.Stanford.EDU>
	<GU8Gf.22899$Jd.6095@newssvr25.news.prodigy.net>
	<dsb95i$pld$1@xenon.Stanford.EDU>
	<1139384021.290153.120470@g14g2000cwa.googlegroups.com>
Message-ID: <43e9ba7e$0$31853$626a54ce@news.free.fr>

Pierre Quentel wrote:
> This is because Python has a hidden mechanism to detect programs
> generated by Perl scripts, and make them crash with no explanation
> 

KEYBOARD !

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From richmoore44 at gmail.com  Fri Feb 24 08:51:55 2006
From: richmoore44 at gmail.com (richmoore44 at gmail.com)
Date: 24 Feb 2006 05:51:55 -0800
Subject: KPanelApplet using Python
In-Reply-To: <1140785533.642904.263660@j33g2000cwa.googlegroups.com>
References: <mailman.2391.1140782029.27775.python-list@python.org>
	<1140785533.642904.263660@j33g2000cwa.googlegroups.com>
Message-ID: <1140789115.123838.210280@t39g2000cwt.googlegroups.com>

Another way to do it is to use ksystraycmd which is included with your
KDE. Some usage info is covered in my tutorial:
http://xmelegance.org/customising-window-behaviour/html/customising-window-behaviour.html

Rich.



From george.sakkis at gmail.com  Mon Feb 13 15:46:32 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 13 Feb 2006 12:46:32 -0800
Subject: Writing a Web Robot in Python
References: <1139818483.962291.131570@g47g2000cwa.googlegroups.com>
Message-ID: <1139863592.516855.75850@g44g2000cwa.googlegroups.com>

You'd probably get more results by searching for "web crawlers" or "web
spiders". You may start from here:

http://harvestman.freezope.org/faq.html

HTH,
George



From mfranklin1 at gatwick.westerngeco.slb.com  Wed Feb 15 05:54:21 2006
From: mfranklin1 at gatwick.westerngeco.slb.com (Martin Franklin)
Date: Wed, 15 Feb 2006 10:54:21 +0000
Subject: Downloading files using urllib in a for loop?
In-Reply-To: <1139998630.164445.207110@f14g2000cwb.googlegroups.com>
References: <1139996216.765104.119260@g14g2000cwa.googlegroups.com>
	<mailman.1937.1139998195.27775.python-list@python.org>
	<1139998630.164445.207110@f14g2000cwb.googlegroups.com>
Message-ID: <43F3085D.9000604@gatwick.westerngeco.slb.com>

justsee at gmail.com wrote:
> Thanks - but have printed and verified they are valid paths and
> filenames. One correction to the code I listed:
>    theurl = imagepath[:-8]
> 
> For some reason the values aren't being passed through
> urllib.urlretrieve properly but this makes no sense to me?
> 

A working (for me!) example:-


import urllib

paths = ["http://www.python.org/index.html", ]



for remotepath in paths:
     # keep only last 10 chars (index.html)
     # for local file name
     localpath = remotepath[-10:]

     print remotepath, localpath

     urllib.urlretrieve(remotepath, localpath)




From aleaxit at yahoo.com  Sat Feb 11 13:24:04 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sat, 11 Feb 2006 10:24:04 -0800
Subject: ordered sets operations on lists..
References: <mailman.1722.1139590689.27775.python-list@python.org>
	<1139592166.993686.212000@f14g2000cwb.googlegroups.com>
	<1139599834.975607.77180@f14g2000cwb.googlegroups.com>
Message-ID: <1halbdx.dd0p1l1obawfkN%aleaxit@yahoo.com>

Raymond Hettinger <python at rcn.com> wrote:
   ...
> The intersection step is unnecessary, so the answer can be simplified a
> bit:
> 
> >>> filter(set(l2).__contains__, l1)
> [5, 3]
> >>> filter(set(l1).__contains__, l2)
> [3, 5]

...and if one has time to waste, "setification" being only an
optimization, it can also be removed: filter(l2.__contains__, l1) etc
(very slow for long lists, of course).

Personally, I'd always use (depending on guesses regarding lengths of
lists) [x for x in l1 if x in l2] or the setified equivalent, of course.


Alex




From larry.bates at websafe.com  Thu Feb 23 19:04:06 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Thu, 23 Feb 2006 18:04:06 -0600
Subject: How would you open this file?
In-Reply-To: <1140735212.419265.219980@e56g2000cwe.googlegroups.com>
References: <1140735212.419265.219980@e56g2000cwe.googlegroups.com>
Message-ID: <43FE4D76.6090605@websafe.com>

Bob wrote:
> I want to open a file in a function and pass the file back to main so
> another function can manipulate the file, something like this:
> 
> # begin
> def open_file()
>   filename=open(options.filename_input,'r')
>   return filename
> 
> open_file()
> print filename.read()
> filename.close()
> # end
> 
> But this doesn't work... It appears that "open_file()" needs a
> variable, but in order to pass a variable to "open_file()" I first need
> a variable... but I would rather have the function send me "filename"
> without creating it main. Is that possible?
> 
> Is there a better way to have a function open a file and pass the file
> back to main than what I am trying to do?  Thanks!
> 

Your function returned filename but in the main program you didn't
have anywhere for it to be saved.

fp=open_file()
print fp.read()
fp.close()

Others have pointed out the filename is a bad choice for a
variable name as it is a pointer to a file object.  Most
tutorials and a lot of standard library code use fp.

-Larry Bates


From deets at nospam.web.de  Thu Feb 23 08:12:15 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 23 Feb 2006 14:12:15 +0100
Subject: Get Root access in Linux?
References: <1140698762.654497.272490@o13g2000cwo.googlegroups.com>
Message-ID: <465qp8F9hujdU1@uni-berlin.de>

tbonejo at gmail.com wrote:

> Does anyone know how to call for the root prompt before launching your
> app?
> Kinda like synaptic or the superuser file manager does?

That is Windowmanager/Desktop dependand. For KDE, you can e.g. create links
to applications that instruct the KDE to first acquire root privileges. As
gnome and KDE try to become more cooperative especially in config-issues,
you might be lucky and can use one mechanism for both.

However, this is neither a python nor a general unix thing. For better
answers, try and search the KDE/gnome resources.

Diez


From grahn+nntp at snipabacken.dyndns.org  Sun Feb  5 12:33:54 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 5 Feb 2006 17:33:54 GMT
Subject: Importing a class, please help...
References: <a1pFf.138$CO7.124@fe02.lga>
	<ds588l$aii$1@aphrodite.grec.isp.9tel.net>
Message-ID: <slrnducdnv.2t1.grahn+nntp@frailea.sa.invalid>

On Sun, 05 Feb 2006 17:16:38 +0100, Xavier Morel <xavier.morel at masklinn.net> wrote:
> anon wrote:
>> Would somebody please drop me a hint, please?
>> 
> Yeah, the definition of "JAR" is Java ARchive, why the hell would a 
> Python script be able to read a JAR in the first place

You are rude to an obvious newbie here ... please keep in mind that today's
stupid newbies are tomorrow's Python professionals.

...
> If you want to use Java classes and modules in a Pythonic context, you 
> want Jython (http://www.jython.org/) not Python (http://www.python.org/)

Maybe he /is/ running Jython and failed to explain that properly? If I
understand things correctly, jar files are not tied to Java but to the java
bytecode format -- which Java and Jython share.

In either case, we'd need more information from the original poster.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From fredrik at pythonware.com  Mon Feb 27 19:04:05 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 28 Feb 2006 01:04:05 +0100
Subject: str.count is slow
References: <1141073696.107136.318600@j33g2000cwa.googlegroups.com>
	<1141083127.970403.147100@v46g2000cwv.googlegroups.com>
Message-ID: <du041o$3fs$1@sea.gmane.org>

Ben Cartwright wrote:

> > On my machine, the output is:
> >
> > str:     0.29365715475
> > array:   0.448095498171
> > unicode: 0.0243757237303

> This tactic typically avoids most (sometimes all) of the calls to
> memcmp.  Other string search functions, including unicode.count,
> unicode.index, and str.index, use this tactic, which is why you see
> unicode.count performing better than str.count.

it's about time that someone sat down and merged the string and unicode
implementations into a single "stringlib" code base (see the SRE sources for
an efficient way to do this in plain C).

moving to (basic) C++ might also be a good idea (in 3.0, perhaps).  is any-
one still stuck with pure C89 these days ?

</F>





From agriff at tin.it  Sun Feb 26 17:29:08 2006
From: agriff at tin.it (Andrea Griffini)
Date: 26 Feb 2006 14:29:08 -0800
Subject: How can I find the remainder when dividing 2 integers
In-Reply-To: <J7oMf.1656$d61.735@trnddc05>
References: <1140984473.723258.70050@e56g2000cwe.googlegroups.com>
	<J7oMf.1656$d61.735@trnddc05>
Message-ID: <1140992948.579675.228000@t39g2000cwt.googlegroups.com>

Writing a while loop with ++x to increment the index was the first
mistake i made with python.
"++x" unfortunately is valid, it's not a single operator but a double
"unary plus"

Andrea



From cjw at sympatico.ca  Mon Feb 20 15:11:23 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Mon, 20 Feb 2006 15:11:23 -0500
Subject: number ranges (was Re: Matlab page on scipy wiki)
In-Reply-To: <43F97AA8.50005@REMOVEMEcyber.com.au>
References: <e86a5fd00602131854s73191cbbu742d4434ad074908@mail.gmail.com>
	<1139945386.3346.38.camel@pc1.cole.uklinux.net>
	<43F8D881.5030804@sympatico.ca>
	<gfmdnZrrLeHK22TenZ2dnUVZ_tCdnZ2d@comcast.com>
	<43F97AA8.50005@REMOVEMEcyber.com.au>
Message-ID: <EnpKf.901$XZ3.92029@news20.bellglobal.com>

Steven D'Aprano wrote:
> John Zenger wrote:
> 
>> I strongly agree that Python should promote range or xrange to syntax. 
>> I favor [0..10] rather than [0:10] because 0..10 is inherently easier 
>> to understand.
> 
> 
> "Inherently"?
> 
> You mean people are born with an instinctive, unlearnt understanding of 
> ..? Or that our brains are constructed in such a way that .. is easier 
> to understand?
> 
> For what it is worth, even after years of Python programming, I still 
> sometimes write this:
> 
> for i in len(myList):
>     # Oops.
> 
> I too prefer range() or xrange() over magic syntax, but I'm not 
> especially a lover of the range() idiom. How about this? With the 
> introduction of a single keyword, we could do this:
> 
> for i in 2 to 5:
>     print i,
> 
> which would print 2 3 4 5
This could be extended to:
for i in 2 to 5 by 2:
   print i

This would require another reserved word.

Colin W.
> 
> (I'm open to arguments that it should be more Pythonic and less 
> mathematical, and halt at 4.)
> 
> A second keyword "downto" would allow easy backwards loops, and a third 
> "step" will absolutely kill any chance of Guido agreeing to this 
> whatsoever.
> 
> 
> 
>> Haskell also has a good step notation.  In Haskell:
>>
>> [1..10] means [1,2,3,4,5,6,7,8,9,10]
>> [1,3..10] means [1,3,5,7,9]
> 
> 
> I'm wary of that notation. It is too easy to make typos, what with , and 
> . next to each other, and the typos often will not raise an exception 
> but will simply give incorrect but puzzling behaviour. This isn't unique 
> to the proposed syntax (e.g. under Python today it isn't obvious whether 
> [0,3] is a typo for [0.3]) but it gives me pause.
> 
> 


From claird at lairds.us  Tue Feb 28 07:08:02 2006
From: claird at lairds.us (Cameron Laird)
Date: Tue, 28 Feb 2006 12:08:02 GMT
Subject: Python advocacy in scientific computation
References: <1139937227.379829.215090@z14g2000cwz.googlegroups.com>
	<45h1lqF6hks7U2@individual.net>
Message-ID: <crndd3-vik.ln1@lairds.us>

In article <45h1lqF6hks7U2 at individual.net>,
Georg Brandl  <g.brandl-nospam at gmx.net> wrote:
>Michael Tobis wrote:
>> Someone asked me to write a brief essay regarding the value-add
>> proposition for Python in the Fortran community. Slightly modified to
>> remove a few climatology-related specifics, here it is.
>
>Great text. Do you want to put it onto a Wiki page at wiki.python.org?
			.
			.
			.
<URL: http://wiki.python.org/moin/PythonAdvocacyInScientificComputation >


From sschwarzer at sschwarzer.net  Wed Feb  8 17:07:00 2006
From: sschwarzer at sschwarzer.net (Stefan Schwarzer)
Date: Wed, 08 Feb 2006 23:07:00 +0100
Subject: Avoiding FTP server timeout for files based on sockets (long posting)
Message-ID: <43EA6B84.3030508@sschwarzer.net>

Hi all!

For my FTP library module ftputil [1], some users have asked
for a way to avoid server timeouts (FTP status code 421). But I
haven't found out yet how I can do this in all cases.

I try to explain the problem in more detail. The following is
rather special and probably not so easy to understand, but I'll
do my best. Please ask if you need more information.

ftputil has an FTPHost class (defined in [2]), which can be
instantiated like

# very similar to ftplib.FTP
host = ftputil.FTPHost(ftphost, user, password)

You can use an FTPHost instance to get file(-like) objects from it:

read_from_this_file = host.file("remote_file", "r")
write_to_this_file = host.file("another_remote_file", "wb")

In the background, each call of the FTPHost.file method opens
another connection to the FTP server by using the login data from
the FTPHost instantiation. The return value of each call is a
_FTPFile object (defined in [3]) which wraps a file object
returned by socket.makefile.

My current FTPHost.keep_alive is roughly defined as

# in FTPHost
def keep_alive(self):
    # just prevent loss of the connection, so discard the result
    self.getcwd()
    # refresh also connections of associated file-like objects
    for host in self._children:
        # host._file is an _FTPFile object (see [3])
        host._file.keep_alive()

whereas in _FTPFile it's

# in _FTPFile
def keep_alive(self):
    if self._readmode:
        # read delegates to the file made from the data transfer
        # socket, made with socket.makefile (see [4])
        self.read(0)
    else:
        # write delegates to the file made from the data transfer
        # socket, made with socket.makefile (see [4])
        self.write("")
        self.flush()

In fact, the read method call above on the data transfer channel
keeps the connection open but the call to the write method can't
avoid a timeout from the FTP server (however, I notice this only
when I call _FTPFile.close(), so it seems that no data is sent
until the _FTPFile.close call).

An approach which seems feasible at first is to call pwd() on the
FTP session (an ftplib.FTP class) on which the _FTPFile builds
(similar to the FTPHost.getcwd() call above). Unfortunately, this
doesn't work because as soon as the file is opened, a STOR
command has been sent to the FTP server and it seems I can't send
another FTP command until the data transfer is finished (by calling
_FTPFile.close; see _FTPFile._open in [3] for details of making
the connection).

So to re-phrase my question: How can I keep the connection - for
writing of remote files - from being closed by the FTP server
without requiring the user of the ftputil library to explicitly
send data with _FTPFile.write?

Stefan

[1] http://ftputil.sschwarzer.net/
[2] http://ftputil.sschwarzer.net/trac/browser/trunk/ftputil.py
[3] http://ftputil.sschwarzer.net/trac/browser/trunk/ftp_file.py
[4] http://docs.python.org/lib/socket-objects.html#l2h-2660


From xavier.morel at masklinn.net  Sat Feb 11 19:10:08 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Sun, 12 Feb 2006 01:10:08 +0100
Subject: appending to a list via properties
In-Reply-To: <1hal7v6.1pa7ijfg3np46N%aleaxit@yahoo.com>
References: <1139605443.823899.141260@g47g2000cwa.googlegroups.com>
	<1139670699.632590.148760@g14g2000cwa.googlegroups.com>
	<1hal7v6.1pa7ijfg3np46N%aleaxit@yahoo.com>
Message-ID: <dslu58$alg$1@apollon.grec.isp.9tel.net>

Alex Martelli wrote:
> Carl Banks <invalidemail at aerojockey.com> wrote:
>    ...
>>>     class better_list (list):
>>>         tail = property(None, list.append)
>> This is an impressive, spiffy little class.
> 
> Yes, nice use of property.
> 
> Alex

I don't know, I usually see people considering that properties are 
"cool" as long as they don't have side effects, as long as they're 
virtual members.

The tail property doesn't behave like member data at all, the semantics 
are strange, counter-intuitive (tail would usually be the end of the 
list, either [-1] or [1:], in this case it's some magic position at the 
end of the list). And it has one hell of a side effect.


From hancock at anansispaceworks.com  Tue Feb 28 16:06:22 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Tue, 28 Feb 2006 15:06:22 -0600
Subject: PEP 354: Enumerations in Python
In-Reply-To: <du285o$ub1$1@sea.gmane.org>
References: <87accdplbj.fsf@rose.polar.local>
	<1141109451.570616.86140@p10g2000cwp.googlegroups.com>
	<440415A1.7070503@ofai.at> <du285o$ub1$1@sea.gmane.org>
Message-ID: <20060228150622.69d01398@samwise.anansi>

On Tue, 28 Feb 2006 14:26:49 -0500
"Terry Reedy" <tjreedy at udel.edu> wrote:
> "Stefan Rank" <stefan.rank at ofai.at> wrote in message 
> news:440415A1.7070503 at ofai.at...
> > recent examples from this list:
> >
> > 2006-01-03:
> > http://www.nabble.com/Re%3A-Regex-anomaly-p2179421.html
> > 2006-02-20:
> > http://www.nabble.com/Re%3A-Regular-expression-gone-mad-p3029028.html
> 
> If the re flags were implemented as instances of object
> instead of int, then misuse of them as int args would be
> excepted.  I don't know if such a  change would otherwise
> cause a problem.
> 
> I wonder whether a subclass of object (EnumSet?) that
> allowed for  initialization with a better string
> representation and that disabled order  comparisons would
> fill the bill for unordered enum.
> 
> As Steven Bethard also noted, there seem to be a need for
> two Enum  subclasses:
> EnumSet and EnumSeq.

And one other distinction -- mutable versus immutable. A
immutable enum is the usual use case, a mutable one is a
"vocabulary" (i.e. an open set of symbols, which
nevertheless requires controlled access).

The key thing about symbols like enums etc is that they
don't really represent anything (or that which they
represent is inconvenient to bind to the symbols -- perhaps
its even an abstract concept that has no programmatic
representation beyond the enumerated value).

One thing about an enumerated value is that it should know
what enum it belongs to. For example, I'm currently working
on a project that has the following rather unfortunate
near-collision of symbols:

sym.ABSTRACTS  "scope of abstract nouns" in 
                   SCOPE vocabulary

sym.ABSTR      "definiteness of abstract noun" in 
                   ARTICLE enum

sym.ABST       "number of noun which has no
                   count because abstract (not mass)"
                   NUMBER enum

It's quite useful that I can ask "sym.ABST" which one of
the above domains it's in:

>>> sym.ABST.domain
NUMBER

or even better:

>>> sym.ABST
<!NUMBER: ABST>

Which makes the enumeration values somewhat
self-documenting.  I'm currently trying to figure out how
best to make this instead show (e.g.):

>>> sym.ABST
<!NUMBER: ABST - Noun uncountable because abstract.>

I can of course, also use this to catch errors by checking
that the pluralization function in my locale module has
been passed a NUMBER or an explicit int, instead of say, a
SCOPE, by accident.

Another feature here is that all of these symbols, though
also defined within their domain collections is also made
into an attribute of the sym object (which is a "trivial
class" or "convenience namespace").

I also raise an error if any domain tries to overwrite a
symbol in sym, so I can avoid accidental collisions.

I'm still tinkering with this, and the above is from memory,
but I do have it working on another machine. I'm currently
subclassing from dict, not set, though I'm unsure if this is
really wise (but I'm more familiar with dict, and I'm
currently making use of the mapping internally, though I'm
not sure I really need to).

I'm not sure this would be a smart way to do this in another
application, but it looks promising for this one (which is
a kind of artificial locale-neutral language
representation).

I'm not sure that the enum described in the PEP would be as
useful to me as this.  So  I'm -0 on it becoming a built-in,
though I'm +0 on it becoming a module (it's not that hard
to type "from enum import Enum").  But I'm not sure it's the
"best" enum, or even that "one size fits all" with enums
(though having fewer implementations might improve clarity
if they are really equivalent).

Cheers,
Terry

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From deusfaber at gmail.com  Sun Feb 12 15:58:00 2006
From: deusfaber at gmail.com (dfaber)
Date: 12 Feb 2006 12:58:00 -0800
Subject: python and webcam
In-Reply-To: <slrnfa00000duv6pl.915o.pbouige@electre.pasteur.fr>
References: <1139773485.698970.195320@z14g2000cwz.googlegroups.com>
	<slrnfa00000duv6pl.915o.pbouige@electre.pasteur.fr>
Message-ID: <1139777880.787466.210640@f14g2000cwb.googlegroups.com>

It is a  Win32 Python Extension. I am looking for something that work
on Linux.



From michaeltaft at gmail.com  Sun Feb 12 04:06:37 2006
From: michaeltaft at gmail.com (mwt)
Date: 12 Feb 2006 01:06:37 -0800
Subject: Clearing the screen
In-Reply-To: <1139731250.332185.278280@o13g2000cwo.googlegroups.com>
References: <1139688262.046667.296940@g14g2000cwa.googlegroups.com>
	<mailman.1761.1139688853.27775.python-list@python.org>
	<1139725568.890659.253770@f14g2000cwb.googlegroups.com>
	<pan.2006.02.12.06.59.19.550394@REMOVETHIScyber.com.au>
	<1139731250.332185.278280@o13g2000cwo.googlegroups.com>
Message-ID: <1139735197.228877.71770@z14g2000cwz.googlegroups.com>

Arrgghh... Is there any way to edit posts on this thing?
The os.system("clear") doesn't work at all in a module.



From deets at nospam.web.de  Fri Feb 24 04:49:42 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 24 Feb 2006 10:49:42 +0100
Subject: PYTHONPATH?
References: <JAsLf.257$6I.183@newsread3.news.pas.earthlink.net>
Message-ID: <46839nF9pi1rU1@uni-berlin.de>

Dr. Pastor wrote:

> Several Documents about Python
> refer to PYTHONPATH.
> I could not find such variable.
> (Python 2.4.2, IDLE 1.1.2, Windows XP)
> How should/could I nominate a Directory to be
> the local Directory?
> Thanks for any guidance.

It's a so called environment-variable. You can set these in some obscure
windows dialog in the system-preferences on a per-system or per-user base.
Or you start using cygwin (lots of good other reasons for that), and do

export PYTHONPATH=/whatever

Diez


From julius.lucks at gmail.com  Sun Feb 19 21:08:18 2006
From: julius.lucks at gmail.com (Julius Lucks)
Date: 19 Feb 2006 18:08:18 -0800
Subject: Eric3 Help/Tutorial
Message-ID: <1140401298.746089.47010@g43g2000cwa.googlegroups.com>

Does anyone know of Help docs/tutorials that explain Eric3's plethora
of features?

http://www.die-offenbachs.de/detlev/eric3.html

Thanks,

Julius



From fuzzyman at gmail.com  Fri Feb  3 06:28:04 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 3 Feb 2006 03:28:04 -0800
Subject: would it be feasable to write python DJing software
In-Reply-To: <drvdq6$gjq$1@bagan.srce.hr>
References: <1138925819.465108.181760@o13g2000cwo.googlegroups.com>
	<druc1r$cre$1@bagan.srce.hr>
	<1138962918.427815.70300@g14g2000cwa.googlegroups.com>
	<drvdq6$gjq$1@bagan.srce.hr>
Message-ID: <1138966084.385205.254410@g14g2000cwa.googlegroups.com>


Ivan Voras wrote:
> simonwittber at gmail.com wrote:
>
> > Actually, manipulating and mixing audio samples can be both fast and
> > elegant, in Python, if you use Numeric or a similar library.
>
> ... at which point you're actually doing it in C, not pure python... :)

Only in as much as doing anything in Python is *really* doing it in C,
surely ?

Come to that, you're **really** doing it in machine code...

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml



From mrstephengross at hotmail.com  Fri Feb 17 11:30:45 2006
From: mrstephengross at hotmail.com (mrstephengross)
Date: 17 Feb 2006 08:30:45 -0800
Subject: Simple question about freeze
Message-ID: <1140193845.660117.302750@g43g2000cwa.googlegroups.com>

I'm working with the freeze utility, and I'm trying to learn the
basics. For the most part, I think I understand how it works. I have a
question about modules, though.

I want to make sure that my native executable is entirely standalone.
That is, it should have no dynamic linking. I've read through a number
of posts on the subject, and think I get it. In order to make this
work, I need to do two things:

(1) Recompile libpythonXXX.a so that the required modules are indeed
compiled into the archive.
(2) Modify the freeze-generated Makefile to force gcc to use static
linking and to use my custom-built libpythonXXX.a in linking together
the native executable.

My question is: is it sufficient to carry out the above steps? Freeze
is designed to use the version of python installed on the host system,
*not* a custom build in a different directory. If freeze looks to the
system's default installation, but I've modified the makefile to use my
custom-built libpython.a, will that cause problems? My sense is that it
will not, but I want to make sure I think things through. Any thoughts?

Thanks,
--Steve (mrstephengross at hotmail.com)



From Nainto at gmail.com  Wed Feb 22 19:34:47 2006
From: Nainto at gmail.com (Nainto)
Date: 22 Feb 2006 16:34:47 -0800
Subject: Cross-Platform Bonjour Module
In-Reply-To: <1140652897.395005.244170@z14g2000cwz.googlegroups.com>
References: <1140652897.395005.244170@z14g2000cwz.googlegroups.com>
Message-ID: <1140654887.769340.85180@f14g2000cwb.googlegroups.com>

Take a look at:
http://lists.apple.com/archives/bonjour-dev/2005/Jun/msg00018.html



From vania.smirk at gmail.com  Mon Feb 13 16:27:39 2006
From: vania.smirk at gmail.com (VSmirk)
Date: 13 Feb 2006 13:27:39 -0800
Subject: hard disk activity
In-Reply-To: <7xbqxb0xo0.fsf@ruckus.brouhaha.com>
References: <1139850420.902979.71620@o13g2000cwo.googlegroups.com>
	<g9i1v1lbf2rhmgskmkh5f9mt73s67umckk@4ax.com>
	<1139857505.376840.37440@g43g2000cwa.googlegroups.com>
	<1139859890.407497.124870@o13g2000cwo.googlegroups.com>
	<1139863885.755813.324450@g47g2000cwa.googlegroups.com>
	<7xfymn0yda.fsf@ruckus.brouhaha.com>
	<1139864840.300396.170070@o13g2000cwo.googlegroups.com>
	<7xbqxb0xo0.fsf@ruckus.brouhaha.com>
Message-ID: <1139866059.604198.245040@g44g2000cwa.googlegroups.com>

Thanks for the head's up.  I was so giddy with the simplicity of the
solution, I stopped trying to poke holes in it.

I agree with your philosophy of not "reinventing the wheel", but I did
notice two things:  First, the link you provided claims in the features
section that rsync if for *nix systems, so I am assuming I'll need a
port of it for windows systems; however looking at a Python rsync
module I found, it looks like it's just doing file-copy (which I have
already solved).

So I'm wondering if you know off-hand which windows port does this
checksum validation you outlined.



From lycka at carmen.se  Tue Feb 14 09:50:49 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Tue, 14 Feb 2006 15:50:49 +0100
Subject: Rethinking the Python tutorial
In-Reply-To: <ormdnWevlMJuLm3eRVn-tg@speakeasy.net>
References: <dsfqv4$shc$1@wake.carmen.se>
	<mailman.1721.1139586567.27775.python-list@python.org>
	<dsq3ta$bne$1@wake.carmen.se>
	<mailman.1836.1139846681.27775.python-list@python.org>
	<ormdnWevlMJuLm3eRVn-tg@speakeasy.net>
Message-ID: <dssqo9$chg$1@wake.carmen.se>

A.M. Kuchling wrote:
> On Mon, 13 Feb 2006 11:03:55 -0500, 
> 	Steve Holden <steve at holdenweb.com> wrote:
>>What we are talking about here is a Python Language Users' Guide.
> 
> I actually started on such a document over the holidays, but have only
> described about 3 or 4 statements at this point.

Great! I hope you'll find the time to make this into something useful.
I don't know how easy it is to make such a thing into a collaborative
effort. Either way, I think some kind of champion is needed... I hope
we'll see some kind of tools for on-line collaboration for python.org
soon, whether it's something wiki-like or some other way to add comments
to the web pages.


From nogradi at gmail.com  Thu Feb  9 16:42:16 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Thu, 9 Feb 2006 22:42:16 +0100
Subject: pythonic exec* spawn*
Message-ID: <5f56302b0602091342m32dfc9aey65399003b229178c@mail.gmail.com>

Is it possible to pass a python object to a python program as argument?

In my program I would like to start executing an other python program
and don't wait until that finishes, only launch it and keep running
the original program. The obvious way I can think of it is using the
exec* or spawn* function families. However, these are generic
functions to start any external program and I was wondering if there
was a special way to start a python program (as opposed to an
arbitrary program), especially because I would like to pass data to
this other program in the form of python objects.

While the original program is running it creates all sorts of data in
a nice pythonic way, for example as a class instance with lot of
member data, and then I wouldn't want to convert all of this into
command line arguments because that would create a huge list. I would
like to pass the whole object at once to the second python program
which should start doing its thing with it while the original program
should keep running.

I was looking around for threading and forking but couldn't come up
with a clear solution.


From siona at chiark.greenend.org.uk  Wed Feb  8 09:49:48 2006
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 08 Feb 2006 14:49:48 +0000 (GMT)
Subject: 450 Pound Library Program
References: <1139351498.090768.82270@o13g2000cwo.googlegroups.com>
Message-ID: <qGn*dfO+q@news.chiark.greenend.org.uk>

mwt <michaeltaft at gmail.com> wrote:
>        while len(self.stacks) == 0:

To (kind of) repeat myself, the idiomatic Python would be:

        while not self.stacks:

An empty list is considered to be false, hence testing the list
itself is the same as testing len(l) > 0 .

As someone else has noticed, you're using len() an awful lot
when you don't need to.

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From xavier.morel at masklinn.net  Thu Feb 16 20:32:53 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Fri, 17 Feb 2006 02:32:53 +0100
Subject: define loop statement?
In-Reply-To: <bvp9v1tjvebinb894vhrlu7n26euh3l73o@4ax.com>
References: <lW4Jf.31559$3V4.8390@trnddc06>
	<bvp9v1tjvebinb894vhrlu7n26euh3l73o@4ax.com>
Message-ID: <dt38v2$a1b$1@aphrodite.grec.isp.9tel.net>

Rene Pijlman wrote:
> David Isaac:
>> I would like to be able to define a loop statement
>> (nevermind why) so that I can write something like
>>
>> loop 10:
>>    do_something
>>
>> instead of
>>
>> for i in range(10):
>>    do_something
>>
>> Possible?  If so, how?
> 
> Yes. By implementing a compiler or an interpreter for your programming
> language. Or a preprocessor that converts your language to Python, or some
> other suitable intermediate language. Or a programmer, that converts your
> pseudocode and some coffee to the desired algorithm :-)
> 
Or by hacking through the Python source and creating his own "somehow 
pythonish but absolutely not python" language


From larry.bates at websafe.com  Tue Feb 21 12:42:24 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 21 Feb 2006 11:42:24 -0600
Subject: fast text processing
In-Reply-To: <dtepd7$qi8$1@news.ox.ac.uk>
References: <dteiec$o7m$1@news.ox.ac.uk>
	<mailman.2209.1140513044.27775.python-list@python.org>
	<dtepd7$qi8$1@news.ox.ac.uk>
Message-ID: <43FB5100.9000906@websafe.com>



Alexis Gallagher wrote:
> Steve,
> 
> First, many thanks!
> 
> Steve Holden wrote:
>> Alexis Gallagher wrote:
>>>
>>> filehandle = open("data",'r',buffering=1000)
>>
>> This buffer size seems, shall we say, unadventurous? It's likely to
>> slow things down considerably, since the filesystem is probably going
>> to naturally wnt to use a rather larger value. I'd suggest a 64k minumum.
> 
> Good to know. I should have dug into the docs deeper. Somehow I thought
> it listed lines not bytes.
> 
>>> for currentLine in filehandle.readlines():
>>>
>> Note that this is going to read the whole file in to (virtual) memory
>> before entering the loop. I somehow suspect you'd rather avoid this if
>> you could. I further suspect your testing has been with smaller files
>> than 80GB ;-). You might want to consider
>>
> 
> Oops! Thanks again. I thought that readlines() was the generator form,
> based on the docstring comments about the deprecation of xreadlines().
> 
>>> So on every iteration I'm processing mutable strings -- this seems
>>> wrong. What's the best way to speed this up? Can I switch to some
>>> fast byte-oriented immutable string library? Are there optimizing
>>> compilers? Are there better ways to prep the file handle?
>>>
>> I'm sorry but I am not sure where the mutable strings come in. Python
>> strings are immutable anyway. Well-known for it.
> 
> I misspoke. I think was mixing this up with the issue of object-creation
> overhead for all of the string handling in general. Is this a bottleneck
> to string processing in python, or is this a hangover from my Java days?
> I would have thought that dumping the standard string processing
> libraries in favor of byte manipulation would have been one of the
> biggest wins.
> 
>> Of course you leave us in the dark about the nature of
>> table.markEquivalent as well.
> 
> markEquivalent() implements union-join (aka, uptrees) to generate
> equivalence classes. Optimising that was going to be my next task
> 
> I feel a bit silly for missing the double-processing of everything.
> Thanks for pointing that out. And I will check out the biopython package.
> 
> I'm still curious if optimizing compilers are worth examining. For
> instance, I saw Pyrex and Pysco mentioned on earlier threads. I'm
> guessing that both this tokenizing and the uptree implementations sound
> like good candidates for one of those tools, once I shake out these
> algorithmic problems.
> 
> 
> alexis

When your problem is I/O bound there is almost nothing that can be
done to speed it up without some sort of refactoring of the input
data itself.  Python reads bytes off a hard drive just as fast as
any compiled language.  A good test is to copy the file and measure
the time.  You can't make your program run any faster than a copy
of the file itself without making hardware changes (e.g. RAID
arrays, etc.).

You might also want to take a look at csv module.  Reading lines
and splitting on delimeters is almost always handled well by csv.

-Larry Bates


From rarelychecked at gmail.com  Wed Feb  1 11:07:38 2006
From: rarelychecked at gmail.com (Don't Code Faster Than You Can See)
Date: Wed, 01 Feb 2006 16:07:38 +0000
Subject: urllib2 - My POST Request just isn't working right
In-Reply-To: <mailman.1316.1138809232.27775.python-list@python.org>
References: <mailman.1316.1138809232.27775.python-list@python.org>
Message-ID: <8a-dnQmY1NJTQX3eRVny0A@mailbox.co.uk>

(blogger.com gives the same error if you don't .strip() your password 
before using it to connect)

i noticed one spelling mistake here:
 > headers = { 'Referer' : 'YourCompany',

'Referrer'

could it be that simple?


From harlinseritt at yahoo.com  Tue Feb  7 08:01:19 2006
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 7 Feb 2006 05:01:19 -0800
Subject: python
In-Reply-To: <mailman.1539.1139306627.27775.python-list@python.org>
References: <20060206222757.3277.qmail@web25701.mail.ukl.yahoo.com>
	<mailman.1539.1139306627.27775.python-list@python.org>
Message-ID: <1139317279.772951.19440@g47g2000cwa.googlegroups.com>

Hi Simon,

Honestly, any type of application can be programmed with Python. Python
is extremely "wrappable" as it can be wrapped around virtually any type
of platform that exists. You can create GUI, system, and web apps
easily. The main niche that Python holds is the fact it exists for the
benefit of the programmer as opposed to application performance.

Maybe 6-8 years ago this may have not been beneficial for an
application. Now, however, inexpensive, faster and higher-performance
hardware has eliminated application speed and occasional memory leaks
as a non-factor (except perhaps for extreme data crunching and video
gaming -- which must squeeze out as much performance as it can from the
hardware) when it comes to deciding what platform one should use.

Python will help you be more productive as apps will generally be three
times faster to write as opposed to even a language that was once
thought to be easy, Java. A word of warning: once you've gotten used to
writing Python code, you will never want to write using any other
programming language.



From lee at example.com  Wed Feb  1 16:41:35 2006
From: lee at example.com (Lee Harr)
Date: Wed, 01 Feb 2006 21:41:35 GMT
Subject: import datetime
References: <1138739342.436000.11290@g44g2000cwa.googlegroups.com>
	<BgSDf.22171$wk5.19626@news02.roc.ny>
	<1138807764.118105.218190@g44g2000cwa.googlegroups.com>
	<mailman.1326.1138814466.27775.python-list@python.org>
Message-ID: <HV9Ef.13061$qg.5469@news01.roc.ny>

>> I did look at the sys.path but the issue is that I dont see a module
>> name datetime anywhere. Only datetime thing that is there is in include
>> directory and it is datetime.h, which I think is for C interface. I
>> have a python installed on my Windows desktop and it is working fine
>> there. Where is the datetime module stored? Does any body know?
>
> on windows, it's linked to the interpreter.
>
>>>> import datetime
>>>> datetime
><module 'datetime' (built-in)>
>
>>>> import sys
>>>> "datetime" in sys.builtin_module_names
> True
>
> on other platforms, it may be linked to the interpreter or placed in
> a shared library:
>
>>>> import datetime
>>>> datetime
><module 'datetime' from '/usr/local/lib/python2.4/lib-dynload/datetime.so'>
>


So maybe there is just a problem with the way Python was
built. Is that from an "official" HP-UX package? You could
ask on an HP-UX list.

Alternatively, you could try compiling Python yourself.


From johnjsal at NOSPAMgmail.com  Sat Feb 11 01:02:46 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Sat, 11 Feb 2006 01:02:46 -0500
Subject: installing python on a server?
In-Reply-To: <1139610715.439681.185510@g44g2000cwa.googlegroups.com>
References: <PB6Hf.1596$No6.37972@news.tufts.edu>
	<hntpu1pmctfaa61ns32k539nisvvljd96n@4ax.com>
	<DV6Hf.1597$No6.37987@news.tufts.edu>
	<1139610715.439681.185510@g44g2000cwa.googlegroups.com>
Message-ID: <dvCdnRdmMdre43DeRVn-gw@rcn.net>

Renato wrote:
> You mentioned using python for web apps: with which framework?
> (TurboGears, CherryPy, Subway, Django, whatever) Or only for cgi?
> 
> With which web server? (Apache, Twisted, Zope, etc.)
> 
> On which linux platform? (Slackware, Debian, Fedora/RedHat, Suse, etc)
> 
> I think you'll have to think about other questions before.
> 
> On systems with package management (pretty much all of them, except
> Slack) install is a matter of a few commands. And you can automate it,
> obviously.
> 

Yikes, that's all the stuff I don't know. Maybe this is over my head 
right now.


From dwahler at gmail.com  Wed Feb  1 11:41:06 2006
From: dwahler at gmail.com (David  Wahler)
Date: 1 Feb 2006 08:41:06 -0800
Subject: urllib2 - My POST Request just isn't working right
In-Reply-To: <mailman.1318.1138811611.27775.python-list@python.org>
References: <312cfe2b0602010753uc363a85wb3f87cf2677993a2@mail.gmail.com>
	<mailman.1317.1138810288.27775.python-list@python.org>
	<1138810726.547315.82890@f14g2000cwb.googlegroups.com>
	<mailman.1318.1138811611.27775.python-list@python.org>
Message-ID: <1138812066.711274.15360@g43g2000cwa.googlegroups.com>

Gregory Pi?ero wrote:
> Ok, I tried the changes you guys suggested but same error still:
> 1. Corrected spelling of referrer.
> 2. Don't specify host.
>
> Here is what they say my request should look like:
> -------------------------------------------------------------------------
> POST /GatewayDC HTTP/1.0
> Referer: YourCompanyNameGoesHere
> Host: SSLserver.fedex.com
> Accept: image/gif, image/jpeg, image/pjpeg, text/plain, text/html, */*
> Content-Type: image/gif Content-length: %d
>
> Your FedEx Transaction
> -------------------------------------------------------------------------
> Note that Host here is ficticious.  My host should be correct.  And
> they have referrer mispelled here so who knows which to use!
>

"Referer" is the correct header name. The HTTP specification spells it
incorrectly, so "Referrer" is the proper English spelling but invalid
in the context of HTTP. This is for historical reasons, and is not
likely to change.

> Here are some suspicions I have:
>
> 1 . One thing that is weird is that the data part just says "Your
> FedEx Transaction".  I know I put the XML here, but I also notice that
> urllib2 is putting this as:
>
> request=<xml ....
>
> Can I have my xml placed here without that something= part?  That
> don't specify what parameter name I should use.

Are you sure it's supposed to be URL-encoded? Try just sending the XML
data directly as part of the request.

-- David



From pprobert at wisc.edu  Thu Feb 23 16:26:36 2006
From: pprobert at wisc.edu (Paul Probert)
Date: Thu, 23 Feb 2006 15:26:36 -0600
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
Message-ID: <dtl9ad$35h$1@sea.gmane.org>

Hi,
   My app runs in a loop looking for changes in a database, and like a 
good boy I call time.sleep(1) inside the loop. Unfortunately this 
sometimes runs for 200 seconds or so, presumably while my OS is calling 
Bill Gates to tell him what I've been doing. This happens under NT4, 
W2k, and XP. What do people do to fix this? Thanks!

Paul Probert
University of Wisconsin



From kent at kentsjohnson.com  Wed Feb  8 22:18:48 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Wed, 08 Feb 2006 22:18:48 -0500
Subject: Jython inherit from Java class
In-Reply-To: <1139344211.725580.263660@g47g2000cwa.googlegroups.com>
References: <1139344211.725580.263660@g47g2000cwa.googlegroups.com>
Message-ID: <43eab05b_2@newspeer2.tds.net>

Mark Fink wrote:
> I wrote a Jython class that inherits from a Java class and (thats the
> plan) overrides one method. Everything should stay the same.
> 
> If I run this nothing happens whereas if I run the Java class it says:
> usage: java fit.FitServer [-v] host port socketTicket
>         -v      verbose

It sounds like the Java class has a main() function. When you run it as 
an application, the Java runtime looks for the main() function in the 
class you tell it to run.

Even in Java, this behaviour is not preserved by inheritance, a subclass 
has to have its own main() to be executable.

Jython (and Python) works a little differently, your module is executed 
from start to finish when you run it. Any statements that are not inside 
a class or function definition will be executed. (Actually the class and 
function definitions are executed to, but not in the same way...)

You might get the behaviour you want if you put the line
import sys
fit.FitServer.main(sys.argv)

at the end of your file. This will run the main() function of the Java 
class.

Kent

> 
> I think this is because I do not understand the jython mechanism for
> inheritance (yet).
> 
> JyFitServer.py:
> ===========
> import fit.FitServer
> import fitnesse.components.FitProtocol
> from fit.Parse import Parse
> from fit.Fixture import Fixture
> 
> # Inherit from original Java FitServer Implementation by Robert C.
> Martin and Micah D. Martin
> class FitServer(fit.FitServer):
>     # call constructor of superclass
>     def __init__(self, host, port, verbose):
>         FitServer.__init__(self, host, port, verbose)
> 
>     # override process method
>     def process(self):
>         self.fixture.listener = self.fixtureListener
>         print "hello, I am JyFitServer!"
>         try:
>             size = FitProtocol.readSize(self.socketReader)
>             if size > 0:
>                 try:
>                     document =
> FitProtocol.readDocument(self.socketReader, size)
>                     tables = Parse(document)
>                     fixture = Fixture()
>                     fixture.listener = self.fixtureListener;
>                     fixture.doTables(tables)
>                     self.counts.tally(self.fixture.counts)
>                 except FitParseException, e:
>                     self.exception(e)
>         except Exception, e:
>             self.exception(e)
> 
> 
> 
> Please help,
> Mark Fink
> 


From lycka at carmen.se  Sun Feb  5 07:28:39 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Sun, 05 Feb 2006 13:28:39 +0100
Subject: Python vs C for a mail server
In-Reply-To: <87wtgar8vp.fsf@pobox.com>
References: <mailman.3994.1138546139.27774.python-list@python.org>
	<mailman.1197.1138549204.27775.python-list@python.org>
	<1138728303.669646.36940@g49g2000cwa.googlegroups.com>
	<drqa42$8k8$1@wake.carmen.se>
	<1138805854.533303.279610@g49g2000cwa.googlegroups.com>
	<donn-FA6F36.09312101022006@gnus01.u.washington.edu>
	<1138819666.521465.108000@o13g2000cwo.googlegroups.com>
	<87wtgar8vp.fsf@pobox.com>
Message-ID: <ds4r1n$m6c$1@wake.carmen.se>

John J. Lee wrote:
> I guess the same is true of Python in some respects: it's still
> incrementally changing (more than C++, I guess), and isn't all that
> much younger than C++ (around 15 and 23 years old respectively).

But C++ is almost entirely backwards compatible with C, which
adds another dozen years or so...


From michaeltaft at gmail.com  Wed Feb 15 14:45:10 2006
From: michaeltaft at gmail.com (mwt)
Date: 15 Feb 2006 11:45:10 -0800
Subject: Clearing the screen
In-Reply-To: <oet5v1lf2t7i7qg463hnprj7ti0v4hmt4g@4ax.com>
References: <1139688262.046667.296940@g14g2000cwa.googlegroups.com>
	<1139735197.228877.71770@z14g2000cwz.googlegroups.com>
	<mailman.1799.1139784222.27775.python-list@python.org>
	<1139953968.011216.210560@g43g2000cwa.googlegroups.com>
	<oet5v1lf2t7i7qg463hnprj7ti0v4hmt4g@4ax.com>
Message-ID: <1140032710.313981.3940@g47g2000cwa.googlegroups.com>

You know, for now, I just would like it to work in a standard Gnome
terminal (my version is 2.12.0).



From kent at kentsjohnson.com  Mon Feb  6 08:23:13 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Mon, 06 Feb 2006 08:23:13 -0500
Subject: Learning Python
In-Reply-To: <1139159843.488988.279770@g43g2000cwa.googlegroups.com>
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
	<1139156577.897100.69140@g43g2000cwa.googlegroups.com>
	<mailman.1439.1139157505.27775.python-list@python.org>
	<1139158796.288778.244000@z14g2000cwz.googlegroups.com>
	<ds5c0n$cej$2@aphrodite.grec.isp.9tel.net>
	<1139159843.488988.279770@g43g2000cwa.googlegroups.com>
Message-ID: <43e7498f$1_2@newspeer2.tds.net>

Byte wrote:
> Yes, sorry, didnt realise diffrence between int and input. Since i'm
> such an idiot at this, any links to sites for people who need an
> unessicerily gentle learning curve?

The Python tutor mailing list is for newbies:
http://mail.python.org/mailman/listinfo/tutor

Many beginners' tutorials listed here:
http://wiki.python.org/moin/BeginnersGuide/NonProgrammers

Kent


From stewart.midwinter at gmail.com  Sat Feb 11 21:02:03 2006
From: stewart.midwinter at gmail.com (stewart.midwinter at gmail.com)
Date: 11 Feb 2006 18:02:03 -0800
Subject: installing python on a server?
In-Reply-To: <mbssu1h9atu6i8h2o311932nbksbkmeluh@4ax.com>
References: <PB6Hf.1596$No6.37972@news.tufts.edu>
	<hntpu1pmctfaa61ns32k539nisvvljd96n@4ax.com>
	<DV6Hf.1597$No6.37987@news.tufts.edu>
	<1139610715.439681.185510@g44g2000cwa.googlegroups.com>
	<dvCdnRdmMdre43DeRVn-gw@rcn.net>
	<21bsu1dpb4nabbq04fdpubkidj23dh379j@4ax.com>
	<RuWdnViaD4SI3HPeRVn-tw@rcn.net>
	<mbssu1h9atu6i8h2o311932nbksbkmeluh@4ax.com>
Message-ID: <1139706297.538841.5990@z14g2000cwz.googlegroups.com>

I'm wondering whether you couldnn't use MovPy for this purpose - a
situation where you don't have root access.  You can install the whole
MovPy package in your home directory; it provides a self-contained
environment.   At the moment I think it only runs on Windows boxen, but
that may change.



From http  Sat Feb 25 18:00:37 2006
From: http (Paul Rubin)
Date: 25 Feb 2006 15:00:37 -0800
Subject: Is Python a Zen language?
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
	<1140878147.541074.233540@i40g2000cwc.googlegroups.com>
	<1140879469.853398.322850@i40g2000cwc.googlegroups.com>
	<1140903119.580735.108440@e56g2000cwe.googlegroups.com>
Message-ID: <7xoe0vhwmi.fsf@ruckus.brouhaha.com>

"Kay Schluehr" <kay.schluehr at gmx.net> writes:
> I have at times the impression that many people who talk about Zen
> philosophy confuse it with some home brewn mixture of platonism with
> its transgressive move towards the true reality, a stoic hedonism of
> contemplation and the taoistic being-in-doing. Zen on the other side is
> more radical: if you erase yourself there is no-one "who" is in the
> flow but chances are that you and the computer over there are the same
> thing.

QOTW or something.


From steve at holdenweb.com  Wed Feb 22 00:32:00 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 22 Feb 2006 00:32:00 -0500
Subject: a little more help with python server-side scripting
In-Reply-To: <JpidnVpklc7cembenZ2dnUVZ_tmdnZ2d@rcn.net>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>	<mailman.2280.1140581372.27775.python-list@python.org>
	<JpidnVpklc7cembenZ2dnUVZ_tmdnZ2d@rcn.net>
Message-ID: <dtgt0g$sn2$1@sea.gmane.org>

John Salerno wrote:
> Steve Holden wrote:
> 
> 
>>Fortunately they've given you the information you need to run CGI
>>scripts. Try installing this script in your cgi-bin directory as test.py 
>>(you may have to set it executable):
> 
> 
> Thank you! I desperately needed to test it, and that seemed to work. I 
> didn't have to make it executable though. I wonder why?

Probably because the cgi-bin directory is specially marked to contain 
executables. If you drop the script in another directory you will almost 
certainly just see the source of the script. Making it executable 
*might* cause it to run, but that would depend on exactly how your 
server is configured.

Certainly my sites all have a line like

ScriptAlias /cgi-bin/ "c:/apache/cgi-bin/"

in the httpd.conf file. ScriptAlias tells Apache that the files in the 
directory are scripts. The first argument is the address in web-space, 
the second the address on disk.

You'll find you can affect *some* configuration items by creating files 
called .htaccess in your web content directories, but that's a ways down 
the road yet.

If the script ran, you will now know waht version of Apaceh you're 
running with!

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From LittlePython at lost.com  Thu Feb 16 21:24:52 2006
From: LittlePython at lost.com (LittlePython)
Date: Fri, 17 Feb 2006 02:24:52 GMT
Subject: Seaching Active Directory via ADO
References: <g_7Jf.33401$0H1.22606@trnddc04>
	<1140138661.484502.86380@f14g2000cwb.googlegroups.com>
	<56aJf.78250$_D1.4370@trnddc03>
	<1140142239_1425@sp6iad.superfeed.net>
Message-ID: <UtaJf.78260$_D1.52493@trnddc03>

I notice there is no adodb.command. This is not required?
Thx for the example!
"Roger Upole" <rupole at hotmail.com> wrote in message
news:1140142239_1425 at sp6iad.superfeed.net...
> Here's a short example that uses ADO to search for a
> user by wildcard.
>
> import win32com.client
> c = win32com.client.Dispatch("ADODB.Connection")
> c.Open("Provider=ADSDSOObject")
>
> rs,rc=c.Execute("""
> SELECT adspath, title, name
> From 'LDAP://DC=yourdomain, DC=COM'
> where objectClass='user' and name='Roger*'
> """)
>
> while not rs.EOF:
>     for f in rs.Fields:
>         print f.Name, f.Value
>     rs.MoveNext()
>
>     hth
>           Roger
>
> "LittlePython" <LittlePython at lost.com> wrote in message
> news:56aJf.78250$_D1.4370 at trnddc03...
> > Thanks but I was looking more for ADO com object than ADSI or ldap.
> > For some strange reason it is very hard to locate any working scripts
that
> > use ADO  to connect and search AD. Is there an issue with ADO and python
> > when connecting to AD?
> > I have try to build one myself with no luck. I think my problem is with
> > adodb.command calls.
> >
> > Thanks for your response.
> >
> > "alex23" <wuwei23 at gmail.com> wrote in message
> > news:1140138661.484502.86380 at f14g2000cwb.googlegroups.com...
> > > Heya,
> > >
> > > There are a couple of examples on the O'Reilly site. These two are
> > > taken from 'Active Directory Cookbook', the first uses a COM object
> > > while the second uses a native LDAP module:
> > >
> > >
> >
>
http://www.rallenhome.com/books/adcookbook/src/18.6-rootdse_python_com.py.tx
> > t
> > >
> >
>
http://www.rallenhome.com/books/adcookbook/src/18.6-rootdse_python_ldap.py.t
> > xt
> > >
> > > This might give you a start.
> > >
> > > - alex23
> > >
> >
> >
>
>
>
> ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet
News==----
> http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+
Newsgroups
> ----= East and West-Coast Server Farms - Total Privacy via Encryption
=----




From durumdara at gmail.com  Mon Feb 27 08:13:39 2006
From: durumdara at gmail.com (Durumdara)
Date: Mon, 27 Feb 2006 14:13:39 +0100
Subject: Py2Exe - how to set BDist (Build) directory ?
Message-ID: <4402FB03.9090508@gmail.com>

Hi !

I want to set the temp. build directory that it is does not placed in 
python source directory.
I want to set this:
\bin\
compiled version
\src\
python source
\tmp\
temp build dir

How to I do it ?

Thanx for help:
dd


From michael at elehack.net  Tue Feb 28 08:33:47 2006
From: michael at elehack.net (Michael Ekstrand)
Date: Tue, 28 Feb 2006 07:33:47 -0600
Subject: HTML/DOM parser
In-Reply-To: <1141115591.120432.221900@t39g2000cwt.googlegroups.com>
References: <1141115591.120432.221900@t39g2000cwt.googlegroups.com>
Message-ID: <20060228073347.b90d14a4.michael@elehack.net>

On 28 Feb 2006 00:33:11 -0800
"Xah Lee" <xah at xahlee.org> wrote:
> is there a module that lets me parse validated html files and store it
> as a tree?

BeautifulSoup will parse valid HTML (not just XHTML), and also crummy
HTML while it's at it. And generates a tree structure. Warning: I
haven't actually used this myself, I've just looked at it.

http://www.crummy.com/software/BeautifulSoup/

- Michael

-- 
mouse, n: a device for pointing at the xterm in which you want to type.
                -- Fortune


From ian at excess.org  Wed Feb  8 15:10:26 2006
From: ian at excess.org (Ian Ward)
Date: Wed, 08 Feb 2006 15:10:26 -0500
Subject: Replacing curses (Was: Re: Problem with curses and UTF-8)
In-Reply-To: <11ukf0ci8d6ac64@corp.supernews.com>
References: <mailman.1566.1139345769.27775.python-list@python.org>
	<43E9234B.6030108@v.loewis.de>
	<mailman.1588.1139372460.27775.python-list@python.org>
	<11uk55h47lruk18@corp.supernews.com>
	<mailman.1611.1139422272.27775.python-list@python.org>
	<11ukf0ci8d6ac64@corp.supernews.com>
Message-ID: <43EA5032.3080307@excess.org>

Grant Edwards wrote:
> Depending on what you're tring to do, slang might be an option,

I've looked at newt and snack, but all I really need is:
- a way to position the cursor at (0,0)
- a way to hide and show the cursor
- a way to detect when the terminal is resized
- a way to query the terminal size

Ian Ward




From reply.in.the.newsgroup at my.address.is.invalid  Tue Feb 21 12:41:14 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Tue, 21 Feb 2006 18:41:14 +0100
Subject: Zope/Plone - Is it the right solution?
References: <1140532818.195281.316580@g44g2000cwa.googlegroups.com>
Message-ID: <6sjmv117tmgs5sp35k3002882gkisc2lg0@4ax.com>

kbperry:
>1)  Is Zope/Plone overkill for this type of project?

No, Plone is an excellent CMS for your purpose.

>2)  Why use Plone vs. straight up Zope?

Plone is an out-of-the-box CMS for non-technical editors, Zope is the
underlying infrastructure for developers.

>3)  Is there a way to get over the steep learning curves (that I have
>read about)?

There is a steep learning curve when you need to develop custom content
types, application code, integrate other databases and so on. 

But when all you want is a CMS for a community-type website, Plone is
fine. I recommend this book, it probably contains all you need to know:
http://plone.org/documentation/manual/definitive-guide
(it's available as web pages and on dead tree as well)

-- 
Ren? Pijlman


From tuvas21 at gmail.com  Tue Feb 21 15:48:06 2006
From: tuvas21 at gmail.com (Tuvas)
Date: 21 Feb 2006 12:48:06 -0800
Subject: Tkinter Event Binding Double-click
Message-ID: <1140554886.169328.265060@f14g2000cwb.googlegroups.com>

I am trying to execute a function with a tkinter event binding double
click. With 2 mouse clicks done quickly, the function should happen,
otherwise, it should not. However, I am noticing that the time that the
event binding of a double-click is quite long, on the order of a second
or so. I am double-clicking twice in a second, and the function is
being executed 3 times, and not just 2. I want to know, is this
controlled by the OS, or by Tkinter? And if by tkinter, is there a way
to change it, and how so? Thanks!



From enleverlesX.XmcX at XmclaveauX.com  Sat Feb 25 04:51:00 2006
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI)
Date: Sat, 25 Feb 2006 10:51:00 +0100
Subject: PyUNO with different Python
References: <mailman.2306.1140622912.27775.python-list@python.org>
	<43fcad29$0$29099$5fc30a8@news.tiscali.it>
	<43fcc038$0$19689$8fcfb975@news.wanadoo.fr>
	<dtjhn6$fpl$1@lnx107.hrz.tu-darmstadt.de>
	<43fd77cf$0$29110$5fc30a8@news.tiscali.it>
Message-ID: <440061a4$0$29193$8fcfb975@news.wanadoo.fr>

hmmmm...

I can run OK "hello_world.py". But only with Python-core-2.3

Python 2.4 don't run  (conflict-version, or windows error).
And, it's not possible to install extensions (like PyWin) to Python-core-2.3 
(this destroy the same extensions in my "normal" Python 2.4)

I had let down these aspects of OOo.

*sorry for my bad english*

MCI







From user at example.net  Sat Feb  4 14:29:23 2006
From: user at example.net (pyluke)
Date: Sat, 04 Feb 2006 19:29:23 GMT
Subject: re.search slashes
In-Reply-To: <Yj4Ff.746690$x96.167598@attbi_s72>
References: <Yj4Ff.746690$x96.167598@attbi_s72>
Message-ID: <ng7Ff.754536$_o.321727@attbi_s71>

pyluke wrote:
> I'm parsing LaTeX document and want to find lines with equations blocked 
> by "\[" and "\]", but not other instances of "\[" like "a & b & c \\[5pt]"
> 
> so, in short, I was to match "\[" but not "\\]"
> 
> to add to this, I also don't want lines that start with comments.
> 
> 
> I've tried:
> check_eq = re.compile('(?!\%\s*)\\\\\[')
> check_eq.search(line)
> 
> this works in finding the "\[" but also the "\\["
> 
> so I would think this would work
> check_eq = re.compile('(?![\%\s*\\\\])\\\\\[')
> check_eq.search(line)
> 
> but it doesn't.  Any tips?

Alright, this seems to work:

re.compile('(?<![(\%\s*)(\\\\)])\\\\\[')


From s323 at mail.ru  Tue Feb 14 06:52:49 2006
From: s323 at mail.ru (Sergey)
Date: Tue, 14 Feb 2006 14:52:49 +0300
Subject: file names longer than MAX_PATH under Windows 2003
References: <mailman.1895.1139917457.27775.python-list@python.org>
Message-ID: <dssgai$unv$1@news.rtcomm.ru>


"Tim Golden" <tim.golden at viacom-outdoor.co.uk> wrote in message news:mailman.1895.1139917457.27775.python-list at python.org...
[Sergey]

>But note that r prefix to the string. Is it possible
>that your string didn't include it? If not, then the
>backslash character which Windows uses as a separator
>can be stolen by Python which sees it as an escaping
>character.

It's ok with backslashes, I don't use r'', but double them so string is correct:
>>> print c
\\?\e:\files\........




From juho.schultz at helsinki.fi  Thu Feb 16 02:25:15 2006
From: juho.schultz at helsinki.fi (Juho Schultz)
Date: Thu, 16 Feb 2006 09:25:15 +0200
Subject: How to run shell commands within python
In-Reply-To: <1140074469.258382.24620@f14g2000cwb.googlegroups.com>
References: <1140074469.258382.24620@f14g2000cwb.googlegroups.com>
Message-ID: <dt19cr$otl$1@oravannahka.helsinki.fi>

fileexit wrote:
> How can I execute shell commands from within python.  Specifically, I
> am looking for something like the shell "cat".  But this also made me
> wonder how to execute shell commands anyway, just if i needed to do
> that in the future.
> 
You can use os.system() for that.


From derek at hotmail.com  Tue Feb 28 10:23:38 2006
From: derek at hotmail.com (derek)
Date: Tue, 28 Feb 2006 23:23:38 +0800
Subject: looking for help about python-sane
Message-ID: <du1rv5$24l$1@news.hgc.com.hk>

I m looking for help about python-sane, The follow sample code try to 
grab the image from the webcam through a /dev/video0 on linux, it works 
fine for the first 185 times, but it  freeze the computer when i ~ 185, 
I dont know why?

The computer become very busy when i > 160, very strange?

I m using Ubuntu 5.10 Linux

Thanks


-----------------------code start------------------

#! /usr/bin/python

import sane, time, Image

def grabImage(_webcam):
         _webcam.mode='color'
         _webcam.start()
         img=_webcam.snap()
         return img



for i in range(200):
         print 'i=', i
         sane.init()
         webcam = sane.open('v4l:/dev/video0')
         grabImage(webcam)
         webcam.close()
         sane.exit()
         time.sleep(1)
----------------------code end-------------------

---------------------output--------------------
i=0
i=1
i=2
....


i= 182
i= 183
i= 184
i= 185
Traceback (most recent call last):
   File "testSane.py", line 17, in ?
     grabImage(webcam)
   File "testSane.py", line 7, in grabImage
     _webcam.start()
   File "/usr/lib/python2.4/site-packages/sane.py", line 201, in start
     return self.dev.start()
_sane.error: Error during device I/O


From dylan.moreland at gmail.com  Sat Feb 18 18:35:05 2006
From: dylan.moreland at gmail.com (Dylan Moreland)
Date: 18 Feb 2006 15:35:05 -0800
Subject: general coding issues - coding style...
In-Reply-To: <slrndvelkv.nrn.mac@news.calmar.ws>
References: <slrndve8oe.5jb.mac@news.calmar.ws><45ool3F7ipqbU1@uni-berlin.de>
	<slrndvelkv.nrn.mac@news.calmar.ws>
Message-ID: <1140305704.970072.177040@g14g2000cwa.googlegroups.com>


calmar wrote:
> On 2006-02-18, Diez B. Roggisch <deets at nospam.web.de> wrote:
> >   - why are these {{{ thingies there?
>
> markers for folding for vim
> http://www.calmar.ws/tmp/sc.png

I would look into one of the many Vim scripts which automatically fold
most large blocks without the ugly {{{.



From gh at ghaering.de  Tue Feb 21 04:52:16 2006
From: gh at ghaering.de (=?ISO-8859-1?Q?Gerhard_H=E4ring?=)
Date: Tue, 21 Feb 2006 10:52:16 +0100
Subject: converting sqlite return values
In-Reply-To: <1140465583.398495.63470@g44g2000cwa.googlegroups.com>
References: <1140465583.398495.63470@g44g2000cwa.googlegroups.com>
Message-ID: <43FAE2D0.5070906@ghaering.de>

bolly wrote:
> Hi,
> I've been putting Python data into a sqlite3 database as tuples but
> when I retrieve them they come back as unicode data e.g
> 'u(1,2,3,4)'. 

Looks like you're using pysqlite 2.x.

> How can I change it back to a tuple so I can use it as a
> Python native datatype?

You cannot store tuples using pysqlite directly:

 >>> from pysqlite2 import dbapi2 as sqlite
 >>> con = sqlite.connect(":memory:")
 >>> cur = con.cursor()
 >>> cur.execute("create table test(foo)")
<pysqlite2.dbapi2.Cursor object at 0x00C9D2F0>
 >>> t = (3, 4, 5)
 >>> cur.execute("insert into test(foo) values (?)", (t,))
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
pysqlite2.dbapi2.InterfaceError: Error binding parameter 0 - probably 
unsupported type.
 >>>

That's because only a limited set of types that have a sensible mapping 
to SQLite's supported data types is supported.

So probably you did something like:

 >>> cur.execute("insert into test(foo) values (?)", (str(t),))
<pysqlite2.dbapi2.Cursor object at 0x00C9D2F0>
 >>> cur.execute("select foo from test")
<pysqlite2.dbapi2.Cursor object at 0x00C9D2F0>
 >>> res = cur.fetchone()[0]
 >>> res
u'(3, 4, 5)'
 >>>

Aha. You stored a string and got back a Unicode string. That's all ok 
because SQLite strings are by definition all UTF-8 encoded that's why 
the pysqlite developer decided that what you get back in Python are 
Unicode strings.

Now there are different possibilites to attack this problem.

a) Use SQLite as a relational database and don't throw arbitrary objects 
at it
b) Write a custom converter and adapter for your tuple type. See 
http://initd.org/pub/software/pysqlite/doc/usage-guide.html#sqlite-and-python-types

This way it will all work transparently from you once you've done the 
preparations.

c) Store and retrieve the whole thing as a BLOB and convert manually:

 >>> cur.execute("delete from test")
<pysqlite2.dbapi2.Cursor object at 0x00C9D2F0>
 >>> cur.execute("insert into test(foo) values (?)", (buffer(str(t)),))
<pysqlite2.dbapi2.Cursor object at 0x00C9D2F0>
 >>> cur.execute("select foo from test")
<pysqlite2.dbapi2.Cursor object at 0x00C9D2F0>
 >>> res = cur.fetchone()[0]
 >>> res
<read-write buffer ptr 0x00C9DDC0, size 9 at 0x00C9DDA0>
 >>> eval(str(res))
(3, 4, 5)

That's the simple apprach, but it sucks because eval() is sloppy 
programming IMO.

So I'd rather marshal and demarshal the tuple:

 >>> import marshal
 >>> cur.execute("delete from test")
<pysqlite2.dbapi2.Cursor object at 0x00C9D2F0>
 >>> cur.execute("insert into test(foo) values (?)", 
(buffer(marshal.dumps(t)),))
<pysqlite2.dbapi2.Cursor object at 0x00C9D2F0>
 >>> cur.execute("select foo from test")
<pysqlite2.dbapi2.Cursor object at 0x00C9D2F0>
 >>> res = cur.fetchone()[0]
 >>> marshal.loads(res)
(3, 4, 5)

> I have looked in the docs and seen there is a decode/encode method but
> how do I do this?

You don't. This was for only there in pysqlite 1.x and pysqlite 2.x. In 
pysqlite 2.x, you use the Python builtin buffer() callable to convert 
strings to buffers to mark them as BLOB values for pysqlite and you 
willg et back buffer objects from pysqlite for BLOB values, too.

HTH,

-- Gerhard


From skromta at gmail.com  Tue Feb 14 06:15:37 2006
From: skromta at gmail.com (Kalle Anke)
Date: Tue, 14 Feb 2006 12:15:37 +0100
Subject: Python / Apache / MySQL
References: <1139907519.427789.188760@g14g2000cwa.googlegroups.com>
	<slrndv38ti.7rh.sybrenUSE@schuimige.unrealtower.org>
	<0001HW.C01764D700060858F0407550@news.individual.de>
	<43f1aebb$0$1728$636a55ce@news.free.fr>
	<0001HW.C01772E1000952B1F0407550@news.individual.de>
	<mailman.1893.1139915116.27775.python-list@python.org>
Message-ID: <0001HW.C0177A69000B1680F0407550@news.individual.de>

On Tue, 14 Feb 2006 12:04:45 +0100, Peter Hansen wrote
(in article <mailman.1893.1139915116.27775.python-list at python.org>):

> SQLite.  (As but one option, but "just basic selects" is certainly 
> included in the set of suitable conditions for SQLite use.)

I've considered to use SQLite for an application but for completely different 
reasons ... hmm, I should perhaps consider SQLite for some other ideas I have 
also ...

> Don't optimize prematurely?  If you use something like SQLObject, or any 
> other means of abstracting yourself away from the details of a specific 
> datbase, you won't be particularly tied to it if you decide you need 
> improved performance, or sophistication, or whatever.


That's true ... I was thinking in general terms here (a couple of people I 
know handles huge data sets, genome data type of things, and in their case 
speed is very important)



From tprimke at interia.pl  Sat Feb  4 07:21:50 2006
From: tprimke at interia.pl (TPJ)
Date: 4 Feb 2006 04:21:50 -0800
Subject: A problem with some OO code.
Message-ID: <1139055710.688193.81000@z14g2000cwz.googlegroups.com>

Help me please, because I really don't get it. I think it's some stupid
mistake I make, but I just can't find it. I have been thinking about it
for three days so far and I still haven't found any solution.

My code can be downloaded from here:
http://www.tprimke.net/konto/PyObject-problem.tar.bz2. There are some
scripts for GNU/Linux system (bash to be precise).

All you need to know is that there are four classes. (Of course, you
may generate all the documentation by typing just "./make_docs". All
you need is Python with Epydoc installed.)

In the PyObject.py there are two classes: Object and OManager. When
Object wants to know if some link is safe (in another words: it wants
to know if some another object exists), it calls the proper method of
its objects' manager (the OManager instance). Details are not important
here, so I'll just say, that if the link is safe, the objects' manager
calls the proper method of the object, that sent him request. This
method of the object just stores the information about that link (that
it's safe), in the so-called private field (the fields used to store
the information about the links are called __ls_existing_links and
__ls_demanded_links).

And now the tests. In the test.py file this is a class called Obj. That
class is just an Object. This is also a class called System1 - this
class is used only to create a more complex system composed of many
objects and one objects' manager.

You can run all the tests by just typing "./test" in console (or a
terminal emulator). I'm still getting the same error:

--------------------------------------------------
Traceback (most recent call last):
  File "test.py", line 142, in test04CreateSystems
    system1 = System1()
  File "test.py", line 81, in __init__
    self.objA.demandNewLink( 'B' )
  File "/home/tpj/opt/Praca/Programy/PyObject/workdir/PyObject.py",
line 503, in demandNewLink
    s_object )
  File "/home/tpj/opt/Praca/Programy/PyObject/workdir/PyObject.py",
line 800, in _makeNewLink
    o_srcobj._makeLinkSafe( s_target )
  File "/home/tpj/opt/Praca/Programy/PyObject/workdir/PyObject.py",
line 608, in _makeLinkSafe
    self.__makeLinkSafe( s_object )
  File "/home/tpj/opt/Praca/Programy/PyObject/workdir/PyObject.py",
line 582, in __makeLinkSafe
    i = self.__ls_demanded_links.index( s_object )
AttributeError: 'Obj' object has no attribute
'_Object__ls_demanded_links'
--------------------------------------------------

Perhaps I'll explain what's going on there. First, the objects' manager
is created, and then also some objects are created. After doing that,
the object called "objA" demands a new link to the other object, called
"objB" (this is the line 81 in the error message above). As the result,
the "demandNewLink" method of the object "objA" is called. This method
calls the "_makeNewLink" method of the objects' manager, and this
method calls the "_makeLinkSafe" method of the object, that demanded a
new link. The last method, called "__makeNewLink" (so this is a
so-called private method), is called then. This last method is supposed
to check if the link was really demanded and then make it "safe" by
placing the information about this link in the proper dictionary
(__ls_existing_links).

All these methods are the methods of the Object class (defined in
PyObject.py), not of the Obj class (defined in test.py). According to
my knowledge about the OO programming Python should be able to realize,
that the so-called private fields, that are being referred from these
Object class methods, are the private fields of the *Obj class
instance*, not of the *Object class one*.

I even wrote a simple program to test the usage of the so-called
private fields in Python classes:

--------------------------------------------------
class A( object ):
  def __init__( self ):
    self.__a = 1
  def _add( self ):
    print "self.__a =", self.__a
    self.__a += 1
  def print_a( self ):
    print self.__a

class B( A ):
  def __init__( self ):
    A.__init__( self )
    self.__b = 2
  def print_b( self ):
    print self.__b

def test():
  o = B()
  o.print_a()
  o.print_b()
  o._add()
  o.print_a()
  o.print_b()
--------------------------------------------------

The code works just as I thought it should work: all is fine here. The
B class instance (the b object) is able to refer to the so-called
private field of the A class (through a A-class method, that was
inherited by the class B).

Why I can't do the same thing in test.py and in PyObject.py?

I just don't get it.

(And sorry for the subject of this topic. I really had no better
idea...)



From mcbooczech at gmail.com  Wed Feb 15 17:03:42 2006
From: mcbooczech at gmail.com (Petr Jakes)
Date: 15 Feb 2006 14:03:42 -0800
Subject: how to get function names from the file
Message-ID: <1140041022.500870.141430@g14g2000cwa.googlegroups.com>

I have got names of functions stored in the file. For the simplicity
expect one row only with two function names: printFoo, printFOO
In my code I would like to define functions and then to read function
names from the file, so the functions can be executed in the order the
function names are stored in a file.

While trying to read the names from the file I am getting always
"strings" and I am not able to execute them.

I would like to write my code so it will look something like:

def printFoo():
    print "foo"

def printFOO():
    print "FOO"

# here I would like to read the file with the function names sequences
# and to create tuple which will contain the function names.
# After that I would like to call functions from the tuple:

functions=(printFoo, printFOO)
for function in functions:
   function()

Thanks for your postings
Petr Jakes



From mrmakent at cox.net  Tue Feb 14 13:19:50 2006
From: mrmakent at cox.net (mrmakent at cox.net)
Date: 14 Feb 2006 10:19:50 -0800
Subject: Python advocacy in scientific computation
In-Reply-To: <1139937227.379829.215090@z14g2000cwz.googlegroups.com>
References: <1139937227.379829.215090@z14g2000cwz.googlegroups.com>
Message-ID: <1139941190.633797.133020@g47g2000cwa.googlegroups.com>

Nicely done.  But now for a couple of small nits:


> other language is that they are suddenly dramatically several times
> more productive

'suddenly dramatically several times' seems a bit redundantly
repeditively excessive, don't you think?


> Among the Python components and Python bindings of special interest to
> scientists are the elegant and powerful matplotlib plotting package,
> which began by emulating and now surpasses the plotting features of
> Matlab, SWIG, which allows for runtime interoperability with various
> languages, f2py which specifically interoperates with Fortran, NetCDF
> libraries (which cope with NetCDF files with dramatically less fuss
> than the standard C or Fortran bindings), statistics packages including
> bindings to the R language,  linear algebra packages,  various
> platform-specific and portable GUI libraries, genetic algorithms,
> optimization libraries, and bindings for high performance differential
> equation solvers (notably, using the Argonne National Laboratory
> package PetSC).

As the length of the sentence built up, and the inumerable commas
passed by, my brain exploded.  I'd suggest turning this into a bullet
list.



From deets at nospam.web.de  Mon Feb 20 19:15:06 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 21 Feb 2006 01:15:06 +0100
Subject: decorator and function local variable
In-Reply-To: <21b0qx59zcqo$.5dmxxfkxl7h3$.dlg@40tude.net>
References: <21b0qx59zcqo$.5dmxxfkxl7h3$.dlg@40tude.net>
Message-ID: <45v4cbF8lb11U1@uni-berlin.de>

Grzegorz Smith schrieb:
> Hi all. I have got situation that I need make parameter injection into
> function and I want that parametet be a local variable of that function.
> eg. something like
> def decorator():
> 	<code>
> @decorator
> def myfun():
>    a = 20
> 
> and in myfun i can use b wariable like that:
> b = "ok it's working"
> I try to use sample decorators from:
> http://www.python.org/moin/PythonDecoratorLibrary 
> but unsuccesfully. Does anyone know hot to achieve this? Or is it possible?

I don't fully understand what you're after here - but are you aware of the __call__-method on objects? You might very 
well do it like this:


class Foo:
   def __init__(self, parameter):
       self.parameter = parameter

   def __call__(self, *args):
       return "%r %r" % (self.parameter, args)

Then you can do

f = Foo()

f(1,2,3,4)

And if you need to alter f's working by means of parameter, just assign it a new value.

Diez


From mark at mark-fink.de  Sun Feb  5 07:36:38 2006
From: mark at mark-fink.de (Mark Fink)
Date: 5 Feb 2006 04:36:38 -0800
Subject: rexec in jython??
References: <1139138133.072742.282710@z14g2000cwz.googlegroups.com>
	<1139140115.016898.72360@z14g2000cwz.googlegroups.com>
Message-ID: <1139142998.236991.130470@g47g2000cwa.googlegroups.com>

this is really funny...
I tried to use eval(String) as an replacement. It works now but the
calculation results from my tests are not as expected: 2 + 3 = 23 !!! 2
- 3 = 2-3...
I have the feeling that there is a really easy solution for this.
Unfortunately I have no enough experience



From johnjsal at NOSPAMgmail.com  Thu Feb 23 11:51:02 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 23 Feb 2006 16:51:02 GMT
Subject: a little more help with python server-side scripting
In-Reply-To: <slrndvp4tc.9ng.sybrenUSE@schuimige.unrealtower.org>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<Lc0Lf.1652$No6.38850@news.tufts.edu>
	<slrndvp4tc.9ng.sybrenUSE@schuimige.unrealtower.org>
Message-ID: <WJlLf.1657$No6.38822@news.tufts.edu>

Sybren Stuvel wrote:

> Check out PSP.

I found a PSP website that said this:

---------
In general, PSP pages are like normal HTML files with two exceptions:

1. They always have a .PSP file extension
2. They can have JPython code embedded in them
---------

That sounds like just what I want, except do I have to write my code in 
Jython? Can't I just use regular Python?


From steve at REMOVETHIScyber.com.au  Sat Feb  4 09:34:33 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sun, 05 Feb 2006 01:34:33 +1100
Subject: A problem with some OO code.
References: <1139055710.688193.81000@z14g2000cwz.googlegroups.com>
Message-ID: <pan.2006.02.04.14.34.32.494116@REMOVETHIScyber.com.au>

On Sat, 04 Feb 2006 04:21:50 -0800, TPJ wrote:

> Help me please, because I really don't get it. I think it's some stupid
> mistake I make, but I just can't find it. I have been thinking about it
> for three days so far and I still haven't found any solution.
> 
> My code can be downloaded from here:
> http://www.tprimke.net/konto/PyObject-problem.tar.bz2. There are some
> scripts for GNU/Linux system (bash to be precise).

Hint: when asking strangers to help you, at THEIR time and expense, with
no offer to recompense them for their efforts, it is up to YOU to make
their job as easy as possible. 

That means don't expect people to download some untrusted, potentially
dangerous, piece of code from a stranger on Usenet, go to the trouble of
extracting it from an archive, and then debug it for you.

You need to simplify the code as much as possible, cutting away everything
you can, to the SMALLEST amount of code that still experiences the problem.

I've made some comments based on the information in your post. If they
don't help, you will need to spend some time creating a short example that
has the same problem. There is very little point in showing us test code
that works -- your problem isn't with code that works, it is with code
that doesn't work.


> All you need to know is that there are four classes.

No, I'm sure we need to know much more than that.


> (Of course, you
> may generate all the documentation by typing just "./make_docs". All
> you need is Python with Epydoc installed.)

Oh right, well just let me rush off and install Epydoc just for you, okay?



> In the PyObject.py there are two classes: Object and OManager. When
> Object wants to know if some link is safe (in another words: it wants
> to know if some another object exists), 

What is a link in your application? What do you mean "another object"?
Like an int or a string?

This is the normal Python idiom for testing whether an object exists
(strictly speaking, whether a name is bound to an object).

try:
    some_object
except NameError:
    print "some_object does not exist"

Is that what you mean?



> it calls the proper method of
> its objects' manager (the OManager instance). Details are not important
> here, 

I bet the details are absolutely vital.


> so I'll just say, that if the link is safe, the objects' manager
> calls the proper method of the object, that sent him request. This
> method of the object just stores the information about that link (that
> it's safe), in the so-called private field (the fields used to store
> the information about the links are called __ls_existing_links and
> __ls_demanded_links).

This is a terribly involved way of doing it, and I'm not even sure what
"it" is that you are trying to do. Are you trying to do some sort of
dispatch mechanism?

I see you have a line "i = self.__ls_demanded_links.index( s_object )". It
looks like you are storing your data in a chunk of text, and then running
index on that text to find the bit you want to work with. If you wanted to
do that much work, just write your script in bash and be done with it!
Python has lists and dicts and other advanced data structures. Use them.
You will be glad.



> And now the tests. In the test.py file this is a class called Obj. That
> class is just an Object. 

So Obj is an alias for Object? What's an Object? Is it the same as the
Python built-in type "object"?

But later on you say:

"All these methods are the methods of the Object class (defined in
PyObject.py), not of the Obj class (defined in test.py)."

So Object and Obj are not the same.



> This is also a class called System1 - this
> class is used only to create a more complex system composed of many
> objects and one objects' manager.
> 
> You can run all the tests by just typing "./test" in console (or a
> terminal emulator). I'm still getting the same error:
> 
> --------------------------------------------------
> Traceback (most recent call last):
>   File "test.py", line 142, in test04CreateSystems
>     system1 = System1()
>   File "test.py", line 81, in __init__
>     self.objA.demandNewLink( 'B' )
>   File "/home/tpj/opt/Praca/Programy/PyObject/workdir/PyObject.py",
> line 503, in demandNewLink
>     s_object )
>   File "/home/tpj/opt/Praca/Programy/PyObject/workdir/PyObject.py",
> line 800, in _makeNewLink
>     o_srcobj._makeLinkSafe( s_target )
>   File "/home/tpj/opt/Praca/Programy/PyObject/workdir/PyObject.py",
> line 608, in _makeLinkSafe
>     self.__makeLinkSafe( s_object )
>   File "/home/tpj/opt/Praca/Programy/PyObject/workdir/PyObject.py",
> line 582, in __makeLinkSafe
>     i = self.__ls_demanded_links.index( s_object )
> AttributeError: 'Obj' object has no attribute
> '_Object__ls_demanded_links'

[snip]

> Perhaps I'll explain what's going on there. First, the objects' manager
> is created, and then also some objects are created. After doing that,
> the object called "objA" demands a new link to the other object, called
> "objB" (this is the line 81 in the error message above). 

Your description does not match what line 81 actually says. It says:

self.objA.demandNewLink('B')

self (an instance of System1, not Obj or Object) grabs the attribute
called "objA", and calls its method demandNewLink with an argument of
the string 'B', not objB an instance of Obj or Object. 

(Aside: generic names like "Obj" or "Object" are poor practice unless they
genuinely are generic. A good name should be self-documenting if possible,
but more importantly, names which are easy to confuse like Obj and Object
should be avoided.)

If you want to work with Object instances, why not just use them instead
of passing around strings that represent them?



> As the result,
> the "demandNewLink" method of the object "objA" is called. This method
> calls the "_makeNewLink" method of the objects' manager, and this
> method calls the "_makeLinkSafe" method of the object, that demanded a
> new link. The last method, called "__makeNewLink" (so this is a
> so-called private method), is called then. 

This seems like a very brittle way to code.

> This last method is supposed
> to check if the link was really demanded and then make it "safe" by
> placing the information about this link in the proper dictionary
> (__ls_existing_links).

Huh? Do you mean that there is a way for links (whatever they are) to be
requested without calling demandNewLink? How would this happen?


> All these methods are the methods of the Object class (defined in
> PyObject.py), not of the Obj class (defined in test.py). According to
> my knowledge about the OO programming Python should be able to realize,
> that the so-called private fields, that are being referred from these
> Object class methods, are the private fields of the *Obj class
> instance*, not of the *Object class one*.

Some serious confusion here.

What are fields? Do you mean attributes? I'm going to assume that you do.

Would it help if I told you that Python doesn't have private attributes?
It *simulates* private attributes using name mangling.

Thus:

class Parrot:
    __plumage = "red"

actually creates a class attribute "_Parrot__plumage". If you know the
name of the class, you can bypass Python's "private attributes".

PLEASE don't bother to tell us how Python sucks because it doesn't have
"real private attributes", we've heard the arguments (and the abuse) fifty
times before.

Now, the consequences:

When Python does a lookup, it looks in the appropriate namespace for a
name. Except for special rules relating to inheritance, Python doesn't
magically look up attributes in another object's namespace just because
that attribute was defined as a private attribute elsewhere. See below for
the consequences.



> I even wrote a simple program to test the usage of the so-called
> private fields in Python classes:

Good. Now how about getting a simple program that demonstrates your
problem?


> class A( object ):
>   def __init__( self ):
>     self.__a = 1
>   def _add( self ):
>     print "self.__a =", self.__a
>     self.__a += 1
>   def print_a( self ):
>     print self.__a

Do you enjoy all this make-work, writing tedious methods to get or set or
print attributes? I suggest you ditch all the private attributes and just
make them public. You've already spent three days hitting your head
against a brick wall because of excessive data-hiding. Was it worth it?
Python is a language that encourages the attitude "We're all adults here"
-- getters/setters are discouraged.



> class B( A ):
>   def __init__( self ):
>     A.__init__( self )
>     self.__b = 2
>   def print_b( self ):
>     print self.__b
> 
> def test():
>   o = B()
>   o.print_a()
>   o.print_b()
>   o._add()
>   o.print_a()
>   o.print_b()

I don't think this is showing what you think it is showing. Private vs
public attributes just get in the way: they work *exactly* the same in
Python except for name mangling. This is the problem bit:

class B( A ):
    def __init__( self ):
      A.__init__( self )  ### LOOK HERE

You aren't creating an A instance here, you are calling A.__init__ with a
first argument of "self", which is a B instance. __init__ does not create
instances, it runs AFTER the instance is already created.

Perhaps you already know that. But I don't think you understand the
consequences of this, when using so-called private attributes:

The call to A.__init__ creates an attribute __a to self. Remember, self is
an instance of B (not A). Apply the name-mangling rules, which are applied
at compile time: the code in A's method mangles __a to _A__a. So
A.__init__ creates an attribute _A__a in B's namespace. So B has two
attributes, _A__a and _B__b.

That means that B methods that access self.__b will work, because the name
mangling rules work *with you*, and self.__b is mangled to self._B__b. But
B methods that access self.__a will NOT work, because it is mangled to
self._B__a, and that attribute does not exist.

(However, that is not your problem.)


> The code works just as I thought it should work: all is fine here.

Except it is brittle and hard to maintain.

> The
> B class instance (the b object) is able to refer to the so-called
> private field of the A class (through a A-class method, that was
> inherited by the class B).
> 
> Why I can't do the same thing in test.py and in PyObject.py?

Here is your exception again:

> line 582, in __makeLinkSafe
>     i = self.__ls_demanded_links.index( s_object )
> AttributeError: 'Obj' object has no attribute
> '_Object__ls_demanded_links'

This is not making sense to me. If self is an instance of Obj, the
name-mangling rules will convert self.__ls_demanded_links to
self._Obj__ls_demanded_links. The only thing I can guess is that somehow,
somewhere, you have tried to manually set the class of an object.

Something like this perhaps?

>>> class Obj:
...     __bar = "nothing"
...
>>> class Object(Obj):
...     __foo = "something"
...     def foo(self):
...         print self.__foo
...     def bar(self):
...         print self.__bar
...
>>> x = Object()
>>> x.__class__.__name__ = "Obj"
>>> x.foo()
something
>>> x.bar()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 6, in bar
AttributeError: Obj instance has no attribute '_Object__bar'

That's the only way I can think of to get such an unusual error.



-- 
Steven.



From greg at cosc.canterbury.ac.nz  Sun Feb 12 01:50:56 2006
From: greg at cosc.canterbury.ac.nz (greg)
Date: Sun, 12 Feb 2006 19:50:56 +1300
Subject: ANN: PyGUI 1.6
Message-ID: <mailman.1780.1139755064.27775.python-announce-list@python.org>

PyGUI 1.6 is now available:

   http://www.cosc.canterbury.ac.nz/~greg/python_gui/

The major change in this version is that the Mac version
is based on Cocoa instead of Carbon. This should provide a
much better base for future development, but it does mean
that MacOSX will now be required. (This isn't as big a
change as it seems, since the Carbon version actually
required MacOSX too, despite being Carbon.)

There have been numerous other changes and improvements
as well. See the CHANGES file in the distribution or on
the web site for full details.


What is PyGUI?
--------------

PyGUI is an experimental highly-Pythonic cross-platform
GUI API. Implementations are currently available for
MacOSX and Gtk. For a full description of the project
goals, see the PyGUI web page at the above address.


From weinhand at unileoben.ac.at  Mon Feb 13 04:28:46 2006
From: weinhand at unileoben.ac.at (WEINHANDL Herbert)
Date: Mon, 13 Feb 2006 10:28:46 +0100
Subject: Writing a Web Robot in Python
In-Reply-To: <1139818483.962291.131570@g47g2000cwa.googlegroups.com>
References: <1139818483.962291.131570@g47g2000cwa.googlegroups.com>
Message-ID: <43f05119$0$11868$3b214f66@aconews.univie.ac.at>

mudgen at gmail.com schrieb:
> I'm working on writing a web robot (for searching web pages) in Python
> so I've been browsing around the web looking for data about building
> web robots.
> 
> I'm surprised to find that I didn't find much data. Seems like robots
> would be kind of a common thing to build. I know there is this: "The
> Web Robots Pages" (http://www.robotstxt.org/wc/robots.html) but that
> doesn't have a lot of data and seems pretty out of date.
> 
> I checked amazon.com for books on building web robots and I didn't find
> very much. Seems kind of weird that I don't find much data on this
> subject. Anybody know some good places to go to get information on
> building a web robots?

maybe one of the following packages will fullfill your needs

http://www.idyll.org/~t/www-tools/twill/

http://wwwsearch.sourceforge.net/mechanize/

http://python.org/pypi/mechanoid

happy pythoning

herbert


From python.list at tim.thechases.com  Mon Feb 27 03:03:38 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Mon, 27 Feb 2006 02:03:38 -0600
Subject: How to do an 'inner join' with dictionaries
In-Reply-To: <1141047580.492771.97130@z34g2000cwc.googlegroups.com>
References: <1141047580.492771.97130@z34g2000cwc.googlegroups.com>
Message-ID: <4402B25A.8040600@tim.thechases.com>

> Let's say I have two dictionaries:
> dict1 is  1:23,  2:76,  4:56
> dict2 is  23:A, 76:B,  56:C
> 
> How do I get a dictionary that is
> 1:A, 2:B, 4:C

 >>> d1={1:23,2:76,4:56}
 >>> d2={23:"a", 76:"b", 56:"c"}
 >>> result = dict([(d1k,d2[d1v]) for (d1k, d1v) in d1.items()])
 >>> result
{1: 'a', 2: 'b', 4: 'c'}



If you don't know that all the values in d1 will be in d2,

 >>> d1[5]=444
 >>> d2[333]='qqq'

you can put in a "if" check like

 >>> result = dict([(d1k,d2[d1v]) for (d1k, d1v) in 
d1.items() if d1v in d2])
{1: 'a', 2: 'b', 4: 'c'}

(using "d1v" for "dictionary1's value" and "d1k" for 
"dictionary1's key")

HTH,

-tkc






From steven.bethard at gmail.com  Tue Feb 28 10:55:38 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 28 Feb 2006 08:55:38 -0700
Subject: PEP 354: Enumerations in Python
In-Reply-To: <87accdplbj.fsf@rose.polar.local>
References: <87accdplbj.fsf@rose.polar.local>
Message-ID: <Q-Gdnf5k7bro75nZRVn-jA@comcast.com>

Ben Finney wrote:
> This PEP specifies an enumeration data type for Python.
> 
> An enumeration is an exclusive set of symbolic names bound to
> arbitrary unique values.  Values within an enumeration can be iterated
> and compared, but the values have no inherent relationship to values
> outside the enumeration.

-1 on the proposal as-is.  I don't have many use cases for enumerations, 
and I don't think they merit appearing in the builtins.  If you put them 
in the collections module instead, I'd probably be +0.

> This allows the operation to succeed, evaluating to a boolean value::
> 
>     >>> gym_night = Weekdays.wed
>     >>> gym_night < Weekdays.mon
>     False
>     >>> gym_night < Weekdays.wed
>     False
>     >>> gym_night < Weekdays.fri
>     True
>     >>> gym_night < 23
>     False
>     >>> gym_night > 23
>     True
>     >>> gym_night > "wed"
>     True
>     >>> gym_night > Grades.B
>     True

For the few cases of enumerations that I've needed, I've never wanted 
them to be comparable with <, >, etc.  If there were two classes, say 
``collections.Enum`` and ``collections.OrderedEnum`` where only the 
latter made the enumerated items comparable, you might even get me as 
high as +0.5.  (I only care about the non-comparable one, but I 
understand that others may have a need for the comparable one.)

STeVe


From claird at lairds.us  Fri Feb 17 10:08:02 2006
From: claird at lairds.us (Cameron Laird)
Date: Fri, 17 Feb 2006 15:08:02 GMT
Subject: Print a PDF transparently
References: <1140184955.674138.275010@o13g2000cwo.googlegroups.com>
Message-ID: <rl2hc3-adh.ln1@lairds.us>

In article <1140184955.674138.275010 at o13g2000cwo.googlegroups.com>,
Daniel Crespo <dcrespo at gmail.com> wrote:
>Hi to all,
>
>I want to print a PDF right from my python app transparently. With
>"transparently" I mean that no matter what program handles the print
>petition, the user shouldn't be noticed about it.
>
>For example, when I want to print a PDF, Adobe Acrobat fires and keep
>opened. This is what I don't want to happen (and I thing there are a
>lot of people who want this too). So I just want to send the PDF to the
>right handler and print it. That's all.
>
>I've seen some things like Adobe's Postscript driver that can read a
>PDF, or Ghostscript, but I still don't know how to use it.
>
>Any help for printing a PDF transparently?
			.
			.
			.
Yes, but it's never going to be easy.  People have worked on this for
years ...

First, what platforms and printers interest you?  Are you only interested
in Linux-connected-to-PostScript-capable-printers, or do you want to do
Windows and Mac, and ...?

Also, there are likely to be licensing considerations sooner or later.
Start thinking about your situation in that regard.


From uche.ogbuji at gmail.com  Tue Feb  7 12:44:28 2006
From: uche.ogbuji at gmail.com (uche.ogbuji at gmail.com)
Date: 7 Feb 2006 09:44:28 -0800
Subject: XML Writer in wxPython
In-Reply-To: <16prs1hphnihj4klt3f8552p6fhsmoeg8v@4ax.com>
References: <1137083537.351635.190010@g14g2000cwa.googlegroups.com>
	<ptehs19nfushuhogq4hl1gj1ss1o1mu2u9@4ax.com>
	<1137405788.767291.175750@o13g2000cwo.googlegroups.com>
	<16prs1hphnihj4klt3f8552p6fhsmoeg8v@4ax.com>
Message-ID: <1139334268.835849.197400@g44g2000cwa.googlegroups.com>

Tim Roberts wrote re using print to generate XML:
> def PrintAddress( last, first, address, city, state, zip ):
>     print "  <address>"
>     print "    <lastname>%s</lastname>" % last
>     print "    <firstname>%s</firstname>" % first
>     print "    <address1>%s</address1>" % address
>     print "    <city>%s</city>" % city
>     print "    <state>%s</state>" % state
>     print "    <zip>%s</zip>" % zip
>     print " </address>"
>
> print "<addresses>"
> for row in addressDatabase:
>     PrintAddress( row.last, row.first,
>        row.address, row.city, row.state, row.zip )
> print "</addresses>"

Just be sure you're well aware of all the issues:

http://www.xml.com/pub/a/2002/11/13/py-xml.html

See also:

http://www.ibm.com/developerworks/xml/library/x-think35.html

--
Uche Ogbuji                               Fourthought, Inc.
http://uche.ogbuji.net                    http://fourthought.com
http://copia.ogbuji.net                   http://4Suite.org
Articles: http://uche.ogbuji.net/tech/publications/



From donn at u.washington.edu  Wed Feb  1 12:31:21 2006
From: donn at u.washington.edu (Donn Cave)
Date: Wed, 01 Feb 2006 09:31:21 -0800
Subject: Python vs C for a mail server
References: <mailman.3994.1138546139.27774.python-list@python.org>
	<mailman.1197.1138549204.27775.python-list@python.org>
	<1138728303.669646.36940@g49g2000cwa.googlegroups.com>
	<drqa42$8k8$1@wake.carmen.se>
	<1138805854.533303.279610@g49g2000cwa.googlegroups.com>
Message-ID: <donn-FA6F36.09312101022006@gnus01.u.washington.edu>

In article <1138805854.533303.279610 at g49g2000cwa.googlegroups.com>,
...
> Granted, it is a pain to change type declarations.

I see it is time for the bi-monthly reminder that C++ is not
the ideal example of strong static typing, unless you just
want to make it look bad.  Cf. Hindley-Milner type inference.

   Donn Cave, donn at u.washington.edu


From codecraig at gmail.com  Sat Feb 18 22:27:42 2006
From: codecraig at gmail.com (abcd)
Date: 18 Feb 2006 19:27:42 -0800
Subject: Get parameters from URL using CGI
In-Reply-To: <mailman.2109.1140297014.27775.python-list@python.org>
References: <1140285087.919635.74530@g43g2000cwa.googlegroups.com>
	<mailman.2109.1140297014.27775.python-list@python.org>
Message-ID: <1140319662.582538.250400@g43g2000cwa.googlegroups.com>

Ian Leitch wrote:
> >>> from urlparse import urlparse
> >>> dict([n for n in [i.split('=') for i in
> urlparse('http://www.somesite.com/cgi-bin/foo.cgi?name=john&age=90')[4].split('&')]])
> {'age': '90', 'name': 'john'}


Ian,  thanks for the reply, but that is not what I need to do.  Inside
foo.cgi how can I parse out the values given in the URL?

So if you visit: http://www.somesite.com/cgi-bin/foo.cgi?valA=1&valB=2
.....I want the script, foo.cgi to print out the parameters and their
values.  It's dynamic so the values are url wont be the same all the
time.  How do i get the URL from the script?  does this make sense?

So I'm thinking foo.cgi will look like
[code]
url = getTheFullURL()
parse(url)

def parse(url):
    # parse the parameter names and values
[/code]



From paul at boddie.org.uk  Thu Feb 23 08:31:26 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 23 Feb 2006 05:31:26 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<yfspsljp321.fsf@oc.ex.ac.uk>
	<1140425017.101462.117380@g47g2000cwa.googlegroups.com>
	<yfslkw5msih.fsf@oc.ex.ac.uk>
	<1140622216.436013.234400@g47g2000cwa.googlegroups.com>
	<yfsaccjl2kh.fsf@oc.ex.ac.uk> <dtibfr$f9p$1@news.doit.wisc.edu>
	<yfszmkjjh0i.fsf@oc.ex.ac.uk>
Message-ID: <1140701486.038987.66790@v46g2000cwv.googlegroups.com>

Alexander Schmolck wrote:
> Rocco Moretti <roccomoretti at hotpop.com> writes:
>
> > I think it's worth pointing out that not all dynamicism is equal, when it
> > comes to difficulty in compiling to machine code.
>
> No kidding (do you have any idea how this thread started out?).

I had to remind myself.

> > Lisp, like the good functional language that it is, has (primarily) immutable
> > values, and minimal side effects.
> [further nonsense snipped]
>
> Please don't spread misinformation about things about which you are clueless[1].

I don't see why you have to be quite so blunt, here. Anyway, some of
the observations made about Python, especially when any comparisons
with Lisp (once corrected) show that Python is more similar to Lisp
than previously thought, are worth considering with respect to things
like type inference and the subsequent generation of low-level code.

> Footnotes:
> [1]  Just as a minor illustrative detail: in python 2 out of 4 builtin
>      collection types are immutable (tuples and strings; newer versions also
>      have immutable and mutable sets) in CL 5 out of 5 are mutable
>      (arrays/vectors/strings, hash-tables, cons cells).

Well, apart from a brief encounter with Lisp back in the microcomputer
era, I've only just got back into looking at the language, and I
suppose I'll eventually find out how the optional type declarations
mentioned occasionally in connection with Lisp actually manage to
handle the harder problems around efficient code generation. I haven't
really studied type systems or compilers in any depth, however, but
having considered the issues for a while I'd like to think that my
rating has progressed from "clueless" to "mostly clueless" by this
point.

Paul



From kent at kentsjohnson.com  Mon Feb 27 15:16:05 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Mon, 27 Feb 2006 15:16:05 -0500
Subject: type = "instance" instead of "dict"
In-Reply-To: <1141069989.763239.191140@u72g2000cwu.googlegroups.com>
References: <1141069989.763239.191140@u72g2000cwu.googlegroups.com>
Message-ID: <44035966$1_2@newspeer2.tds.net>

Cruella DeVille wrote:
> I'm trying to implement a bookmark-url program, which accepts user
> input and puts the strings in a dictionary. Somehow I'm not able to
> iterate myDictionary of type Dict{}
> 
> When I write print type(myDictionary) I get that the type is
> "instance", which makes no sense to me. What does that mean?

Maybe you have an instance of UserDict instead of a built-in dict?

  >>> type({})
<type 'dict'>
  >>> from UserDict import UserDict
  >>> type(UserDict())
<type 'instance'>

UserDict.UserDict is not iterable, though you can still use
   for k in myDictionary.keys()

There is also UserDict.IterableUserDict which does support iteration.

I don't think there is much reason to use UserDict in modern Python as 
dict can be subclassed.

Kent


From finite.automaton at gmail.com  Fri Feb 10 20:47:50 2006
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 10 Feb 2006 17:47:50 -0800
Subject: equivalent functions?
In-Reply-To: <1139621457.141754.228880@f14g2000cwb.googlegroups.com>
References: <1139621457.141754.228880@f14g2000cwb.googlegroups.com>
Message-ID: <1139622470.638044.158410@o13g2000cwo.googlegroups.com>

Very close... it is equivalent to:

    apply_each = lambda fns, args=[]: [f(*args) for f in fns]

The asterisk in f(*args) expands the sequence to fill the arguments to
f, where as f(args) would pass the args as only the first argument to
the function.

apply is deprecated, replaced by the syntax:  function( *args,
**keywords )



From crutcher at gmail.com  Sun Feb 26 00:18:18 2006
From: crutcher at gmail.com (Crutcher)
Date: 25 Feb 2006 21:18:18 -0800
Subject: xslt queries in xml to SQL queries
In-Reply-To: <VS6Mf.7461$vC4.7447@clgrps12>
References: <VS6Mf.7461$vC4.7447@clgrps12>
Message-ID: <1140931098.472396.50620@i39g2000cwa.googlegroups.com>

Skipping ahead, let me try to rephrase this.

First, this isn't really a python question, it is SQL, XSLT, and
program design, but I'll try to answer.

You have templates, they contain general layout stuff, and input
fields. You are transforming them into HTML pages, and part of what you
want to do is to expand the enumerated fields with the enumeration
values at the time of template application.

You read an article about XSLT, and decided that you could use it in
your app. For some unknown reason, perhaps involving large amounts of
alcohol, you want to use the syntax of XSLT, but have it actually
parsed by python, which silently does an SQL querry to give you your
results.

This is a really, really bad idea. There are many ways to solve your
problem using XSLT, and though all of them are easy, none of them are
so simple that I could put them in a post to someone who doesn't know
XSLT. If you know XSLT, follow the directions below, if you don't, DO
NOT USE XSLT for this project. And for the love of anything you may
believe in, don't try to implement a partial XSLT engine in python.


Pattern 1, paramaterized templates:

Pattern 1 assumes that all the data you will need for your templates is
known in advance, and is common to your templates. If this is true, you
need only generate an XML fragment with the data you need, and compose
a document which contains both the data you need, and the page template
you are rendering. Then, write an XSLT transform to build your pages,
which can now resolve data needs in the template section using the data
provided in the data section.

Pattern 2, query extraction:

When you don't know what data the page template might need, and the
full dataset is unmanageably large, you can't use pattern 1 easily. So
instead, write an XSLT transform which _only_ extracts information
about the data you need. You can then run this transform, get the query
list, perform the queries, and use the resultant data for the data tree
from pattern 1.



From mooquack at suad.org  Tue Feb  7 22:24:48 2006
From: mooquack at suad.org (Kirk McDonald)
Date: Tue, 07 Feb 2006 19:24:48 -0800
Subject: UnboundMethodType and MethodType
In-Reply-To: <dsbl2g$i1b$1@news2.rz.uni-karlsruhe.de>
References: <dsbl2g$i1b$1@news2.rz.uni-karlsruhe.de>
Message-ID: <43e9635b$1@nntp0.pdx.net>

Sch?le Daniel wrote:
> Hello all,
> 
>  >>> class Q:
> ...     def bar(self):
> ...             pass
> ...
>  >>> import types
>  >>> types.UnboundMethodType is types.MethodType
> True
>  >>>
>  >>> type(Q.bar)
> <type 'instancemethod'>
>  >>>
>  >>> q = Q()
>  >>> type(q.bar)
> <type 'instancemethod'>
>  >>>
>  >>> type(q.bar) is types.UnboundMethodType
> True
>  >>> q.bar
> <bound method Q.bar of <__main__.Q instance at 0x4042756c>>
>  >>>
> 
> I think is not very consistent
> notice q.bar is bounded although type(q.bar)
> says it's types.UnboundedMethodType
> what do you think?
> 
> Regard, Daniel
> 

I think it's perfectly consistent:

 >>> class B(object):
...     def bar(self): pass
...
 >>> B.bar
<unbound method B.bar>
 >>> type(B.bar)
<type 'instancemethod'>
 >>> b = B()
 >>> b.bar
<bound method B.bar of <__main__.B object at 0xb7bd544c>>
 >>> type(b.bar)
<type 'instancemethod'>
 >>> id(B.bar)
-1211888788
 >>> id(b.bar)
-1211888788

It's the same function, whether it's bound or not. Thus, it should 
always have the same type. It's simply called in different ways. You can 
just as easily say:

 >>> B.bar(b)

As:

 >>> b.bar()

-Kirk McDonald


From sjw28 at sussex.ac.uk  Mon Feb 20 11:09:21 2006
From: sjw28 at sussex.ac.uk (nuttydevil)
Date: 20 Feb 2006 08:09:21 -0800
Subject: Processing text using python
Message-ID: <1140451760.998278.90430@g43g2000cwa.googlegroups.com>

Hey everyone! I'm hoping someone will be able to help me, cause I
haven't had success searching on the web so far... I have large chunks
of text ( all in a long string) that are currently all in separate
notebook files. I want to use python to read these strings of text,
THREE CHARACTERS AT A TIME. (I'm studying the genetic code you see, so
I need to read and analyse each sequence one codon at a time
effectively.) Does anyone have any idea of how to do this using python?


I'm going to be optimistic and thank you for your help in advance!
Samantha.



From pikatxu at pikatxu.re  Mon Feb 20 07:58:43 2006
From: pikatxu at pikatxu.re (pikatxu)
Date: 20 Feb 2006 13:58:43 +0100
Subject: editor for Python on Linux
References: <dtai6e$23m$2@ariane.blic.net>
Message-ID: <pan.2006.02.20.12.58.46.824333@pikatxu.re>

On Sun, 19 Feb 2006 20:52:54 +0100, Mladen Adamovic wrote:

> Hi!
> 
> I wonder which editor or IDE you can recommend me for writing Python
> programs. I tried with jEdit but it isn't perfect.

eclipse+pydev ?
I've never tried it though



From abkhd at earth.co.jp  Wed Feb 22 07:00:45 2006
From: abkhd at earth.co.jp (A.B., Khalid)
Date: 22 Feb 2006 04:00:45 -0800
Subject: With pyMinGW
References: <1140565378.921287.177380@g44g2000cwa.googlegroups.com>
Message-ID: <1140609645.670997.49670@g44g2000cwa.googlegroups.com>

bearophileHUGS at lycos.com wrote:
> To use Pyrex, SWIG and the like on a Win2K I have followed this way:
>
> http://jove.prohosting.com/iwave/ipython/pyMinGW.html
>
> I already had MinGW 3.4.2, so I have decompressed the Python 2.4.2
> sources, I have merged in the pyMinGW patch, and I have run the global
> compilation with:
>
> make -f python24.mak all
>
> It has compiled most things, but not zlibmodule.c
> It has stopped the compilation with:
>
> c:\......\bin\dllwrap.exe: no export definition file provided.
> Creating one, but that may not be what you want
> make[1]: Leaving directory `/.../PyminGW/Python-2.4.2/MinGW'
> make -f zlib.mak
> make[1]: Entering directory `/.../PyminGW/Python-2.4.2/MinGW'
> gcc.exe -c ../Modules/zlibmodule.c -o ../Modules/zlibmodule.o
> -I"../Include" -I"../Pc" -I"../../../d
> ist/zlib-1.2.3"  -Wall -s -DNDEBUG -D_USRDLL -O2
> ../Modules/zlibmodule.c:8:18: zlib.h: No such file or directory
> ../Modules/zlibmodule.c:66: error: syntax error before "z_stream"
>
> ... etc etc.
>
> Anyway, probably 98% was compiled and this Python works, I have tried
> the standard tests and most of them pass.
> Then I have downloaded the pyMinGW Extensions V. 0.0.6.6, so zip and
> other things now work.
>
> The link to the Tcl-Tkinter extension doesn't work (the free site
> hosting the file doesn't accept this file format anymore), so I cannot
> use Tkinter.
>
> I have decompressed SWIG and put it in a temporary Path.
>
> I have then tried a basic SWIG example, (called example) coming from
> this obsolete but probably still interesting page:
> http://sebsauvage.net/python/mingw.html
>
> But I have had problems durign the module creation:
>
> C:\...\PyminGW\Python-2.4.2\MinGW>python setup.py build -cmingw32
> running build
> running build_ext
> building 'example' extension
> swigging example.i to example_wrap.c
> C:\...\PyminGW\swigwin-1.3.28\swig.exe -python -o example_wrap.c
> example.i
> creating build
> creating build\temp.win32-2.4
> creating build\temp.win32-2.4\Release
> C:\......\bin\gcc.exe -mno-cygwin -mdll -O -Wall -Ic:\python24\include
> -Ic:\pytho
> n24\PC -c example_wrap.c -o build\temp.win32-2.4\Release\example_wrap.o
> example_wrap.c: In function `My_variable_set':
> example_wrap.c:2550: error: `My_variable' undeclared (first use in this
> function)
>
> ... ecc.
>
>
> So I have had 3 problems, maybe some of you can suggest me how to solve
> some of them.
>
> (Can the standard Python site accept to distribuite an installer with
> MinGW-compiled Python + minGW + SWIG for people using Windows that want
> such system prebuilt? Maybe me or another person can assemble it).
>
> Thank you,
> bearophile


It seems you may be using an old version of pyMinGW, because in the one
I have the directory issue of zlib was fixed and the relevant part
dealing with include directories in zlib.mak should read now as
follows:

LIBS =  -L. -lpython24 -L"../../../dist/zlib-1.2.3" -lz
--image-base,0x1e1B0000
INCS =  -I"../Include" -I"../Pc" -I"../../../dist/zlib-1.2.3"
CXXINCS =  -I"../Include"  -I"../Pc" -I"../../../dist/zlib-1.2.3"

The idea is to make INCS point at the location of your zlib sources.

As to the Tkinter-Tcl point, then please remember that this was a
binary build extension distribution that had nothing to do with the
core Python that pyMinGW is supposed to address. And if you download
the extension sources then you can certainly build the libraries
yourself, and then the python extensions, especially since you have
make files ready to use for the later in the pyMinGW sources. The
binary distribution was meant to make things a bit easier for people,
but since the site stopped the hosting of zip files and since many
people do not download that particular file anyway when it was hosted
elsewhere, letting the file expire (inactive files are removed after
one week from last download), then I hope you'd agree it would be much
work for me to keep track of expired and unexpired files and so keep on
uploading the files.

As to your SWIG problem, then I suggest you look into the pyMinGW's
extensions' directory. There you will find two examples of building C
and CPP extensions using SWIG and MinGW.

Regards,
Khalid



pyMinGW:
http://jove.prohosting.com/iwave/ipython/pyMinGW.html



From peter at engcorp.com  Tue Feb 21 19:02:08 2006
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 21 Feb 2006 19:02:08 -0500
Subject: Video.
In-Reply-To: <slrndvn5tb.bv5.sybrenUSE@schuimige.unrealtower.org>
References: <bAMKf.4037$UN.840@newsread2.news.pas.earthlink.net>
	<slrndvn5tb.bv5.sybrenUSE@schuimige.unrealtower.org>
Message-ID: <dtg9lt$372$1@sea.gmane.org>

Sybren Stuvel wrote:
> Dr. Pastor enlightened us with:
> 
>>What environment,library,product should I import or study to
>>manipulate cameras, video, fire-wire, avi files?
> 
> 
> That depends on what you want with it. Without more information I'd
> say "transcode"

Presumably this, found easily by typing that exact word into Google: 
http://www.transcoding.org/cgi-bin/transcode




From duncan.booth at invalid.invalid  Sat Feb 18 04:15:11 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 18 Feb 2006 09:15:11 GMT
Subject: Does Plone support distinct sets of users in subgroups?
References: <MPG.1e603f88182909e0989715@newsgroups.comcast.net>
Message-ID: <Xns976E5E1A56F65duncanbooth@127.0.0.1>

wheel wrote:

> I'm not sure if this is the right venue for Plone questions, if not, 
> could someone ref me to a better one? The discussion groups on the plone 
> site are mailing lists and I'd rather not subscribe quite yet.

Use gmane.org: you get NNTP access to all the plone mailing lists (and 
several thousand others) and it will subscribe you automatically under 
its own email address if you choose to post (you have to respond to a 
confirmation email from gmane before first time you post to each 
newsgroup).

http://dir.gmane.org/index.php?prefix=gmane.comp.web.zope.plone


From tim.golden at viacom-outdoor.co.uk  Thu Feb 16 12:06:30 2006
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Thu, 16 Feb 2006 17:06:30 -0000
Subject: Determing whether two ranges overlap
Message-ID: <9A28C052FF32734DACB0A288A3533991044D257A@vogbs009.gb.vo.local>

[Robin Haswell]

| I was wondering if you could give me a hand with something. 
| If I have two
| tuples that define a range, eg: (10, 20), (15, 30), I need to 
| determine
| whether the ranges overlap each other. The algo needs to catch:
| 
| (10, 20) (15, 25)
| (15, 25) (10, 20)
| (10, 25) (15, 20)
| and
| (15, 20) (10, 25)
| 
| I can think of lots of ways to do this but it's in a tight 
| loop so I need
| it to be as efficient as possible. Any help welcome :-)

Don't know about efficient, but:

x = 10, 20
y = 15, 25

(x[0] <= y[1]) and (x[1] >= y[0])

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________


From kent at kentsjohnson.com  Thu Feb  9 11:49:44 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Thu, 09 Feb 2006 11:49:44 -0500
Subject: line wrapping problem
In-Reply-To: <1139484488.037165.106170@g43g2000cwa.googlegroups.com>
References: <1139484488.037165.106170@g43g2000cwa.googlegroups.com>
Message-ID: <43eb6e67$1_3@newspeer2.tds.net>

S Borg wrote:
> Hello,
> 
>  I am parsing text from one document to another. I have a scheme
> similar to:
> 
>  for x in myfoobar:
>    print >> mytextfile, "%s    " % mydictionary[x],   #all on same line
>  print >> mytextfile, '\n'      #new line
> 
> 
> I am getting line breaks before my explicit line break. Am I
> unwittingly copying '\n' characters from the original file?

Where does mydictionary[x] come from? If it is from reading lines from a 
file it may contain trailing newlines.

Also
   print >> mytextfile, '\n'
will print two newlines, one explicit and one implicit in the print.

Kent


From rudy.schockaert at gmail.com  Thu Feb 23 05:53:49 2006
From: rudy.schockaert at gmail.com (Rudy Schockaert)
Date: Thu, 23 Feb 2006 11:53:49 +0100
Subject: CSV module and UNICODE
Message-ID: <60987dac0602230253q3154866erff6b0a4f26b50378@mail.gmail.com>

I'm having problems writing unicode to a csv file.
I use the following code:

-------------------------
import codecs
import csv

csvfile = csv.writer(codecs.open('filename.csv','w+','utf-8'))
a = u'\xc9'
csvfile.writerow([a,a])
-------------------------

It fails with the message: UnicodeEncodeError: 'ascii' codec can't encode
.....

Is there any way I can solve this.

<PEP 305>

   1.

   What about Unicode? Is it sufficient to pass a file object gotten from
   codecs.open()? For example:

   csvreader = csv.reader(codecs.open("some.csv", "r", "cp1252"))

   csvwriter = csv.writer(codecs.open("some.csv", "w", "utf-8"))

   In the first example, text would be assumed to be encoded as cp1252.
   Should the system be aggressive in converting to Unicode or should Unicode
   strings only be returned if necessary?

   In the second example, the file will take care of automatically
   encoding Unicode strings as utf-8 before writing to disk.

   Note: As of this writing, the csv module doesn't handle Unicode data.

</PEP 305>

PEP 305 was last modified on Wed, 11 Aug 2004
<http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/python/python/nondist/peps/pep-0305.txt>
Has something changed in between?


Thanks in advance,

Rudy
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From petite.abeille at gmail.com  Sun Feb 12 11:44:50 2006
From: petite.abeille at gmail.com (PA)
Date: Sun, 12 Feb 2006 17:44:50 +0100
Subject: Is python very slow compared to C
In-Reply-To: <pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
	<1139754010.067582.214830@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>
Message-ID: <dbb12c95088cc5543f268993b86523a3@gmail.com>


On Feb 12, 2006, at 16:11, Steven D'Aprano wrote:

> availability of skilled programmers is absolutely critical for the use 
> of a language.

By that measure, we should all be using Java, no?

"TIOBE Programming Community Index"
http://www.tiobe.com/tpci.htm

> By comparison, even Forth gives 13 million plus hits, and who uses 
> Forth?

Anyone writing in English:

http://www.answers.com/forth&r=67

> Lua appears to be *too* lightweight, without even classes or 
> inheritance,

Programming in Lua
Object-Oriented Programming
http://www.lua.org/pil/16.html

> and a single data type where Python has dicts, sets, tuples and lists.

"Lua gives you the power; you build the mechanisms."
-- Roberto Ierusalimschy, "Programming in Lua", December 2003
http://www.lua.org/pil/12.1.2.html

Cheers

--
PA, Onnay Equitursay
http://alt.textdrive.com/



From peter.maas at somewhere.com  Thu Feb  9 15:34:54 2006
From: peter.maas at somewhere.com (Peter Maas)
Date: Thu, 09 Feb 2006 21:34:54 +0100
Subject: What editor shall I use?
In-Reply-To: <1139410110.389122.215400@z14g2000cwz.googlegroups.com>
References: <1139410110.389122.215400@z14g2000cwz.googlegroups.com>
Message-ID: <dsg966$hpc$1@online.de>

Lad schrieb:
> What editor shall I use if my Python script must contain utf-8
> characters?
> I use XP

An extremely capable, easy to use and small editor is Neil
Hodgson's SciTE. It's my favorite editor on Windows and Linux.
There is a Windows installer at

http://users.hfx.eastlink.ca/~gisdev/scite-1.67-setup-3.exe

Peter Maas, Aachen


From erniedude at gmail.com  Wed Feb  1 10:29:00 2006
From: erniedude at gmail.com (Ernesto)
Date: 1 Feb 2006 07:29:00 -0800
Subject: Capture Windows command line output - put in text file
In-Reply-To: <1138805834.790265.93130@g44g2000cwa.googlegroups.com>
References: <1138805834.790265.93130@g44g2000cwa.googlegroups.com>
Message-ID: <1138807740.494115.55260@g43g2000cwa.googlegroups.com>


Ernesto wrote:
> I'm looking for a way to capture command line output from a cmd
> session.  Is there a way to use python to launch the application from
> the beggining....   then stream all of the output to a text file ?

Nevermind.  This is a telnet question.  I'm trying to get telnet
localhost output to a text file.



From apardon at forel.vub.ac.be  Wed Feb  8 09:23:19 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 8 Feb 2006 14:23:19 GMT
Subject: module with __call__ defined is not callable?
References: <mailman.1580.1139367500.27775.python-list@python.org>
	<pan.2006.02.08.10.21.24.46790@REMOVETHIScyber.com.au>
	<1139394463.255902.168960@f14g2000cwb.googlegroups.com>
	<mailman.1591.1139400885.27775.python-list@python.org>
	<1139401113.301377.21520@g47g2000cwa.googlegroups.com>
	<mailman.1593.1139401901.27775.python-list@python.org>
Message-ID: <slrndujvmn.117.apardon@rcpc42.vub.ac.be>

Op 2006-02-08, Steve Holden schreef <steve at holdenweb.com>:
> Fuzzyman wrote:
>> Steve Holden wrote:
> [...]
>>>
>>>The pursuit of orthogonality, while admirable, can lead to insanity if
>>>pushed too far.
>>>
>> 
>> 
>> Sure - feel free to venture as far down the road of insanity as you
>> like :-) To pursue your analogy, why don't we answer all usenet posts
>> by pushing suggestions to ridiculous levels ? ;-)
>> 
> Right, and publish cartoons of Larry Wall where his hat is a bomb. Then 
> the perlmongers will burn the Googleplex down?
>
>> What would actually be the problem with allowing modules to define a
>> __call__ though ? This would allow for nice clean namespaces at the
>> module level.
>> 
> What's clean about defining __call__() and calling the module name 
> rather than defining functions and calling them?

The same question can be asked about classes? What's clean about
defining a __call__() method and calling the instance name rather
than defining methods and calling them?

> Why should one specific 
> function in a module be promoted to this special status? How many 
> modules have precisely one function?

For the same reason they are already promoted special status in
classes. Python promotes duck typing so why shouldn't special
functions of modules be treated the same as special methods?

-- 
Antoon Pardon


From finite.automaton at gmail.com  Fri Feb 10 15:03:16 2006
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 10 Feb 2006 12:03:16 -0800
Subject: is there a better way?
In-Reply-To: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
Message-ID: <1139599489.308928.54190@g44g2000cwa.googlegroups.com>

everybody is making this way more complicated than it needs to be.

storage = list[:list.index(O)]

incidentally, "list" is the name of a type, so you might want to avoid
using it as a variable name.



From reply.in.the.newsgroup at my.address.is.invalid  Sun Feb 19 15:33:59 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Sun, 19 Feb 2006 21:33:59 +0100
Subject: editor for Python on Linux
References: <dtai6e$23m$2@ariane.blic.net>
Message-ID: <chlhv15ktc4u3adv34sgk63tok5vl9j50q@4ax.com>

Mladen Adamovic:
>I wonder which editor or IDE you can recommend me for writing Python 
>programs.

vi

-- 
Ren? Pijlman


From bblais at bryant.edu  Thu Feb 16 21:44:26 2006
From: bblais at bryant.edu (Brian Blais)
Date: Thu, 16 Feb 2006 21:44:26 -0500
Subject: calculating on matrix indices
In-Reply-To: <aI8Jf.42165$T35.666013@news20.bellglobal.com>
References: <mailman.2027.1140133353.27775.python-list@python.org>
	<aI8Jf.42165$T35.666013@news20.bellglobal.com>
Message-ID: <43F5388A.7010905@bryant.edu>

Colin J. Williams wrote:
> Brian Blais wrote:
>> In my attempt to learn python, migrating from matlab, I have the 
>> following problem. Here is what I want to do, (with the wrong syntax):
>>
>> from numpy import *
>>
>> t=arange(0,20,.1)
>> x=zeros(len(t),'f')
>>
>> idx=(t>5)                # <---this produces a Boolean array, probably not what you want.
>> tau=5
>> x[idx]=exp(-t[idx]/tau)  # <---this line is wrong (gives a TypeError)
>>
> What are you trying to do?  It is most unlikely that you need Boolean 
> values in x[idx]
> 

in this example, as in many that I would do in matlab, I want to replace part of a 
vector with values from another vector.  In this case, I want x to be zero from t=0 
to 5, and then have a value of exp(-t/tau) for t>5.  I could do it with an explicit 
for-loop, but that would be both inefficient and unpython-like.  For those who know 
matlab, what I am doing here is:

t=0:.1:20;
idx=find(t>5);
tau=5;

x=zeros(size(t));
x(idx)=exp(-t(idx)/tau)


is that clearer?  I am sure there is a nice method to do this in python, but I 
haven't found it in the python or numpy docs.


		thanks,

			bb


-- 
-----------------

             bblais at bryant.edu
             http://web.bryant.edu/~bblais


From xavier.morel at masklinn.net  Sun Feb  5 12:20:43 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Sun, 05 Feb 2006 18:20:43 +0100
Subject: Learning Python
In-Reply-To: <1139158796.288778.244000@z14g2000cwz.googlegroups.com>
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
	<1139156577.897100.69140@g43g2000cwa.googlegroups.com>
	<mailman.1439.1139157505.27775.python-list@python.org>
	<1139158796.288778.244000@z14g2000cwz.googlegroups.com>
Message-ID: <ds5c0n$cej$2@aphrodite.grec.isp.9tel.net>

Byte wrote:
> http://docs.python.org/tut/node6.html#SECTION006100000000000000000
> 
-->
 >>> x = int(raw_input("Please enter an integer: "))
<--

Unless my eyes fail me, it's written "int", not "input", the goal of 
this line is to convert the return value of raw_input (a string) into an 
integer.


From steve at REMOVETHIScyber.com.au  Wed Feb 15 07:06:42 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Wed, 15 Feb 2006 23:06:42 +1100
Subject: processing limitation in Python
References: <1139935358.128826.58660@g14g2000cwa.googlegroups.com>
	<b6v5v192erctbag3fi6srb3hmsm5vcoujp@4ax.com>
Message-ID: <pan.2006.02.15.12.06.41.898453@REMOVETHIScyber.com.au>

On Wed, 15 Feb 2006 10:16:07 +0000, Dennis Lee Bieber wrote:

> 	Why bother collecting the "factors" into a list only to print them
> at the bottom of the procedure -- you aren't returning a value from
> factor(), so I'd suggest dropping the 
> 	factors = []
> and
> 	print factors
> 
> replace
> 	factors.append(d)
> with
> 	print d	#optional , if you want as many on a line as possible

This is generally bad practice. You now have a function which can't
easily feed its output into any other function (without pipes, file
redirection and other tricks). The function is now locked down into one
rather limited use: printing the factors.

If you need the factors one at a time, the right way is to use a
generator, and yield them as they are found. Otherwise, the correct way to
solve this problem is to accumulate all the factors in a list and return
the list.


> 	Among other things, besides not needing memory to store the entire
> list, you also get to see it working as each one is found and printed.

The amount of memory needed to store the entire list is trivial for all
but the hugest numbers. A number with 1,000 factors would be enormous,
and yet the memory needed for a list of 1,000 ints could be as small as
8K -- trivial on modern computers.


-- 
Steven.



From zelova at gmail.com  Mon Feb 20 08:55:28 2006
From: zelova at gmail.com (zelova)
Date: 20 Feb 2006 05:55:28 -0800
Subject: editor for Python on Linux
In-Reply-To: <dtai6e$23m$2@ariane.blic.net>
References: <dtai6e$23m$2@ariane.blic.net>
Message-ID: <1140443728.132362.182870@z14g2000cwz.googlegroups.com>

It was said that Boa is good, but I prefer SPE.
WingIDE is good but commercial, I tried it but didn't buy.



From tomkori at gmx.net  Thu Feb  2 05:07:57 2006
From: tomkori at gmx.net (Thomas Korimort)
Date: Thu, 02 Feb 2006 11:07:57 +0100
Subject: Fatal Python error: Py_EndInterpreter: thread still has a frame
Message-ID: <43e1d9fd$0$1224$91cee783@newsreader01.highway.telekom.at>

Hi!

Does anyone know the precise circumstances when the error

"Fatal Python error: Py_EndInterpreter: thread still has a frame"

does occur. I checked the source code of pythonrun.c, which tells me 
that this error message is thrown in Py_EndInterpreter, when 
thread->frame is checked for being NULL. Does anyone know, when this 
pointer is not NULL at the time where Py_EndInterpreter() is called?


Greetings, Thomas Korimort.


From deets at nospam.web.de  Tue Feb 14 05:10:01 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 14 Feb 2006 11:10:01 +0100
Subject: 88k regex = RuntimeError
References: <1139900873.361930.135880@g44g2000cwa.googlegroups.com>
Message-ID: <45dol6F67rg1U1@uni-berlin.de>

> I assume it's hitting some limit, but don't know where the limit is to
> remove it. I tried stepping into it repeatedly with Komodo, but didn't
> see the problem.

That's because it is buried in the C-library that is the actual
implementation. There has been a discussion about this a few weeks ago -
and AFAIK there isn't much you can do about that.

> Suggestions?

Yes. Don't do it :) After all, what you do is nothing but a simple
word-search. If I had that problem, my naive approach would be to simply
tokenize the sources and look for the words in them being part of your
function-name-set. A bit of statekeeping to keep track of the position, and
you're done. Check out pyparsing, it might help you doing the tokenization.


I admit that the apparent ease of the regular expression would have lured me
into the same trap.

Diez


From timr at probo.com  Wed Feb  1 02:59:37 2006
From: timr at probo.com (Tim Roberts)
Date: Wed, 01 Feb 2006 07:59:37 GMT
Subject: simple perl program in python gives errors
References: <1138639924.500376.208600@z14g2000cwz.googlegroups.com>
	<43df635b_1@news.bluewin.ch>
	<mailman.1291.1138724309.27775.python-list@python.org>
Message-ID: <0jq0u1diherpq56ve06m1iu7qqovgp518u@4ax.com>

Dan Lowe <dan at tangledhelix.com> wrote:
>
>Not sure if you typo'd that, but that should read:
>
>a += 200000 * 140000
>print a

Did you try to run that?
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From techiepundit at futurepundit.com  Wed Feb  1 09:57:34 2006
From: techiepundit at futurepundit.com (Randall Parker)
Date: 1 Feb 2006 06:57:34 -0800
Subject: Python vs C for a mail server
In-Reply-To: <drqa42$8k8$1@wake.carmen.se>
References: <mailman.3994.1138546139.27774.python-list@python.org>
	<mailman.1197.1138549204.27775.python-list@python.org>
	<1138728303.669646.36940@g49g2000cwa.googlegroups.com>
	<drqa42$8k8$1@wake.carmen.se>
Message-ID: <1138805854.533303.279610@g49g2000cwa.googlegroups.com>

Magnus Lycka wrote:
> Randall Parker wrote:
> > Also, compile time errors get caught sooner. They get caught before
> > tests even get written.
>
> Not if you do Test Driven Tevelopment. Then you write
> the tests before you compile your target code! It's
> also my experience that the write test - write code
> - run test cycle in TDD with Python is often faster
> than the plain edit - compile cycle in C++. More
> extensive tests take longer, but so does linking of
> C++ code...

Magnus,

I see a problem with your argument: On the one hand you say that
Python's lack of type declarations can be compensated for by Test
Driven Development. But then you say Python has a bigger advantage in
situations where requirements are not well defined. Well, when
requirements are in flux and being explored during development it is a
waste of time to write tests to test against nebulous requirements. TDD
and poor requirements don't mix very well.

As for changing argument types: But this is exactly the sort of
situation where I find myself getting into trouble in Python. I have to
change some type and I forget everywhere I've passed it or returned it.
In C++ if I make changes the compiler is going to keep complaining and
pointing out type clashes I've introduced due to changing a variable's
type. Granted, it is a pain to change type declarations. But visiting
those places often makes me think thru the ramifications of changes.

Also, I've been on projects where the whole purpose of my code has been
to test equations and control laws (this was for space probes to places
like Eros and Saturn btw). We were certainly doing test driven
development in one sense. But the assumption the systems engineers
wanted to make was that the algorithms were written correctly in code
and that if the system didn't behave correctly then the problem was in
the algorithms, not in the code. We therefore were not in a position to
do test drive development on the code itself.



From http  Tue Feb 21 16:07:10 2006
From: http (Paul Rubin)
Date: 21 Feb 2006 13:07:10 -0800
Subject: number ranges
References: <e86a5fd00602131854s73191cbbu742d4434ad074908@mail.gmail.com>
	<1139945386.3346.38.camel@pc1.cole.uklinux.net>
	<43F8D881.5030804@sympatico.ca>
	<gfmdnZrrLeHK22TenZ2dnUVZ_tCdnZ2d@comcast.com>
	<43F97AA8.50005@REMOVEMEcyber.com.au>
	<3_WdnUP9qr9XRmTenZ2dnUVZ_sydnZ2d@comcast.com>
	<1hb1umb.wr2hsk1chby86N%aleaxit@yahoo.com>
	<NMuKf.5613$%14.252734@news20.bellglobal.com>
	<1hb2uq1.e7kdkt1z0ge4rN%aleaxit@yahoo.com>
	<43FAD679.2040305@REMOVEMEcyber.com.au>
	<1hb3o4u.trzcp41f11vxqN%aleaxit@yahoo.com>
Message-ID: <7xacckifpd.fsf@ruckus.brouhaha.com>

aleaxit at yahoo.com (Alex Martelli) writes:
> > for i in (1 to 10 by 3):
> >      print i
> > 
> > should print 1 4 7.
> 
> But that would be an "attractive nuisance" to many other native speakers
> like you, who would instinctively think of a closed interval.  Maybe
> 'upto' rather than 'to', as somebody else suggested, would ease that.

I don't think "upto" is any better.  Any distinction that might exist
between "to" and "upto" doesn't jump out at me.

I notice that Haskell uses closed intervals: [1..5] means [1,2,3,4,5].
Is that an error by Haskell's designers?  One possibility is that those
intervals don't actually get used in ways likely to cause one-off errors.
I haven't used Haskell enough to have any sense of this.

Here's something ugly but explicit, somewhat Haskell-inspired:

   (1 .. )    # infinite generator, like Haskell
   (1 .. < 10)   # semi-closed interval: 1,2,3...,9
   (1 .. <= 10)  # closed interval: 1,2,3...,10
   (1,4 .. < 10)  # semi-closed: 1,4,7
   (1,4, .. <= 10)  # closed: 1,4,7,10

This would be horrible for Python though.


From webraviteja at gmail.com  Fri Feb 17 02:11:53 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 16 Feb 2006 23:11:53 -0800
Subject: web crawler in python or C?
In-Reply-To: <1140069412.051298.242150@g44g2000cwa.googlegroups.com>
References: <1140069412.051298.242150@g44g2000cwa.googlegroups.com>
Message-ID: <1140160313.229734.38170@g44g2000cwa.googlegroups.com>

This is following the pattern of your previous post on language choice
wrt. writing a mail server. It is very common for beginers to over
emphasize performance requirements, size of the executable etc. More is
always good. Right? Yes! But at what cost?

The rule of thumb for all your Python Vs C questions is ...
1.) Choose Python by default.
2.) If your program is slow, it's your algorithm that you need to check
first. Python strictly speaking will be slow because of its dynamism.
However, most of whatever is performance critical in Python is already
implemented in C. And the speed difference of well written Python
programs with properly chosen extensions and algorithms is not far off.
3.) Remember that you can always drop back to C where ever you need to
without throwing all of your code. And even if you had to, Python is
very valuable as a prototyping tool since it is very agile. You would
have figured out what you needed to do by then, that rewriting it in C
will only take a fraction of the time compared to if it was written in
C directly.

Don't even start with asking the question, "is it fast enough?" till
you have already written it in Python and it turns out that it is not
running fast enough despite correctness of your code. If it does, you
can fix it relatively easily. It is easy to write bad code in C and
poorly written C code performance is lower than well written Python
code performance.

Remember Donald Knuth's quote.
"Premature optimization is the root of all evil in programming".

C is a language intended to be used when you NEED tight control over
memory allocation. It has few advantages in other scenarios. Don't
abuse it by choosing it by default.



From deets at nospam.web.de  Thu Feb 23 06:22:45 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 23 Feb 2006 12:22:45 +0100
Subject: cx_Oracle and UTF8
References: <1140628824.353213.278300@o13g2000cwo.googlegroups.com>
Message-ID: <465kbtF9bvemU1@uni-berlin.de>

Harald Armin  Massa wrote:

> Hello,
> 
> I am looking for a method to convince cx_Oracle and oracle to encode
> it's replies in UTF8.
> 
> For the moment I have to...
> 
> cn=cx_Oracle.connect("user","password", "database")
> cs=cn.Cursor()
> 
> cs.execute("select column1, column2, column3 from table")
> 
> for row in cs.fetchall():
>    t=[]
>    for i in range(0,len(row)):
>       if hasattr(row[i],"encode"):
>         t.append(row[i].encode("utf8"))
>       else:
>         t.append(row[i])
>     print t
> 
> Guess I am to much accustomed to postgresql which just allows "set
> client_encoding='utf8'...

You can do that in Oracle, too. It's called NLS (national language support),
and it is like a locale-setting in python/C. I'm too lazy to google right
now, but you should be able to alter the current connection's session to
deliver strings in whatever encoding is supportde (utf-8 being amongst
these).

Diez


From bonono at gmail.com  Fri Feb 24 05:02:02 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 24 Feb 2006 02:02:02 -0800
Subject: A C-like if statement
In-Reply-To: <pan.2006.02.24.09.58.32.497698@REMOVETHIScyber.com.au>
References: <hp-dnY20cusOnGPeRVn-rg@nmt.edu><dtl04p$5q2$1@reader2.panix.com>
	<sdadnS6nfNnbmmPeRVn-sw@nmt.edu>
	<pan.2006.02.23.22.14.53.56541@REMOVETHIScyber.com.au>
	<1140742149.011750.321530@z34g2000cwc.googlegroups.com>
	<pan.2006.02.24.09.58.32.497698@REMOVETHIScyber.com.au>
Message-ID: <1140775322.788083.256970@v46g2000cwv.googlegroups.com>


Steven D'Aprano wrote:
> On Thu, 23 Feb 2006 16:49:09 -0800, bonono wrote:
>
> >
> > Steven D'Aprano wrote:
> >> On Thu, 23 Feb 2006 12:04:38 -0700, Bob Greschke wrote:
> >>
> >> >> try:
> >> >>    i = a.find("3")
> >> >>    print "It's here: ", i
> >> >> except NotFound:
> >> >>    print "No 3's here"
> >> >
> >> > Nuts.  I guess you're right.  It wouldn't be proper.  Things are added or
> >> > proposed every day for Python that I can't even pronounce, but a simple 'if
> >> > (I = a.find("3")) != -1' isn't allowed.  Huh.  It might be time to go back
> >> > to BASIC. :)
> >>
> >> There are *reasons* why Python discourages functions with side-effects.
> >> Side-effects make your code hard to test and harder to debug.
> >>
> >
> >>>> "test".index("a")
> > Traceback (most recent call last):
> >   File "<pyshell#0>", line 1, in -toplevel-
> >     "test".index("a")
> > ValueError: substring not found
> >>>> "test".find("a")
> > -1
>
>
> Did you have a point?
>
It was about your side-effect talk, if you failed to see it, that is
fine.

BTW, it seems that the term side-effect of function used is a bit
different from my understanding of how it is in general used in this
field.



From peter at engcorp.com  Thu Feb 23 19:06:18 2006
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 23 Feb 2006 19:06:18 -0500
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <dtlc01$dd2$1@sea.gmane.org>
References: <dtl9ad$35h$1@sea.gmane.org> <dtlat7$80c$1@sea.gmane.org>
	<dtlc01$dd2$1@sea.gmane.org>
Message-ID: <dtlill$35v$1@sea.gmane.org>

Paul Probert wrote:
> Peter Hansen wrote:
>>Are you saying that you believe the time.sleep(1) call is actually 
>>blocking for 200 seconds?  Or just that your loop (and we can only guess 
>>what it looks like) is the one taking that long?
> 
> Yes, I'm doing this:
>            .....
>           oldtime=time.time()
>           time.sleep(1)
>           newtime=time.time()
>           dt=newtime-oldtime
>            if dt > 2:
>                print 'dt=',dt,' time=',time.strftime('%Y_%m_%d_%Hh_%Mm_%Ss')
> Its happening roughly 4 times a day total on our 20 machines, ie about 
> once every 5 days on a given machine.

So the above is printing "dt=200" or something like that?  Or just low 
values slightly larger than 2s?  Or a wide range of values?  Can you 
post samples of the print output for some of those failing runs?

-Peter



From steve at holdenweb.com  Tue Feb 21 10:16:20 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 21 Feb 2006 10:16:20 -0500
Subject: Mutable numbers
In-Reply-To: <43fb2462$0$3211$636a55ce@news.free.fr>
References: <dteele$9pi$1@home.itg.ti.com>
	<43fb2462$0$3211$636a55ce@news.free.fr>
Message-ID: <43FB2EC4.50201@holdenweb.com>

fraca7 wrote:
> Suresh Jeevanandam a ?crit :
> 
>># I am new to python.
>>
>>In python all numbers are immutable. This means there is one object ( a 
>>region in the memory ) created every time we do an numeric operation. I 
>>hope there should have been some good reasons why it was designed this way.
> 
> 
> The memory allocation for integers is optimized. 'Small' integers 
> (between -5 and 100 IIRC) are allocated once and reused. The memory for 
> larger integers is allocated once and reused whenever possible, so the 
> malloc() overhead is negligible.

The first bit's right, the second bit isn't:

  >>> id(12100)
4604168
  >>> id(121*100)
4604204
  >>>

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From dave.opstad at monotypeimaging.com  Mon Feb 20 11:42:51 2006
From: dave.opstad at monotypeimaging.com (Dave Opstad)
Date: Mon, 20 Feb 2006 08:42:51 -0800
Subject: Tkinter / Aqua (OS X) question (canvas borders)
References: <1140295255.361958.82510@o13g2000cwo.googlegroups.com>
Message-ID: <dave.opstad-F2FF16.08425020022006@news.isp.giganews.com>

In article <1140295255.361958.82510 at o13g2000cwo.googlegroups.com>,
 "dmsbox2000-list1 at yahoo.com" <dstark7 at gmail.com> wrote:

> There appears to be an asymmetric "border"
> around the inside of the canvas.

There was a thread on this last May (you can search for the thread 
titled "Unusable outer edge of Tkinter canvases?")

Fredrik Lundh suggested resetting the coordinate system via:

w.xview_moveto(0)
w.yview_moveto(0)

This seemed to help, but in the end it still seems that there's a narrow 
border inside the edges of a Canvas which can't be drawn to. And it 
seems to be different for OS X and Windows.

In the end I just made sure everything I draw is no closer than 5 pixels 
from the edge of the Canvas, and that seems to work on all the platforms 
I'm deploying on.

Dave Opstad


From __peter__ at web.de  Sun Feb 12 09:48:36 2006
From: __peter__ at web.de (Peter Otten)
Date: Sun, 12 Feb 2006 15:48:36 +0100
Subject: breaking from loop
References: <1139557074.938577.281250@f14g2000cwb.googlegroups.com>
	<dshk7o$i92$02$1@news.t-online.com>
	<1139579096.471160.292300@g14g2000cwa.googlegroups.com>
Message-ID: <dsnhp4$50o$01$1@news.t-online.com>

Ritesh Raj Sarraf wrote:

> def copy_first_match(repository, filename, dest_dir): # aka
> walk_tree_copy()
> ????for?path,?file?in?files(repository):
> ????????if?file?==?filename:
> ????????????try:
> ????????????????shutil.copy(os.path.join(path,?file),?dest_dir)
> ????????????????sys.stdout.write("%s?copied?from?local?cache?%s."?%
> (file, repository))
> ????????????except?shutil.Error:
> ????????????????sys.stdout.write("%s?is?available?in?%s.?Skipping
> Copy!" % (file, dest_dir))
> ????????????return?True
> ????return?False
> 
> All I've added is the exception check because in case "file" is
> available in "dest_dir", I want to display a message.
> Since I'm still new and learning will be great if you let me know if
> this is the proper way or not.

I prefer to let the exception propagate. As you wrote it, the code calling
copy_first_match() has no way of knowing whether a file was copied or not.

If you don't want to bother with exceptions in the calling code I'd slightly
modify the try...except:

try:
   # copy
except (shutil.Error, OSError), e:
   # print failure message
   return False

I. e.

- catch OSError, too. I think shutil.copy() is more likely to raise an
OSError than a shutil.Error.
- return False if an exception occurs. That way you can test if something
went wrong like so:

if not copy_first_match(...):
    print "file not found or unable to copy it"

Peter



From ian at excess.org  Wed Feb  8 17:46:49 2006
From: ian at excess.org (Ian Ward)
Date: Wed, 08 Feb 2006 17:46:49 -0500
Subject: Problem with curses and UTF-8
In-Reply-To: <43EA6238.6040004@v.loewis.de>
References: <mailman.1566.1139345769.27775.python-list@python.org>	<43E9234B.6030108@v.loewis.de>
	<11ujl0hof3fql62@corp.supernews.com>
	<mailman.1617.1139425534.27775.python-list@python.org>
	<43EA6238.6040004@v.loewis.de>
Message-ID: <43EA74D9.90902@excess.org>

Martin v. L?wis wrote:

> If that was Python's configure: don't do that. Instead, hack setup.py
> to make it change the compiler/linker settings, or even edit the
> compiler/linker line manually at first.

Ok, that compiled.

Now when I run the same test:

import curses
s = curses.initscr()
s.addstr('\xc3\x85 U+00C5 LATIN CAPITAL LETTER A WITH RING ABOVE\n')
s.addstr('\xc3\xa5 U+00F5 LATIN SMALL LETTER O WITH TILDE')
s.refresh()
s.getstr()
curses.endwin()


This is what I see:

  +00C5 LATIN CAPITAL LETTER A WITH RING ABOVE
  +00F5 LATIN SMALL LETTER O WITH TILDE


so, the UTF-8 characters didn't appear and the " U" at the beginning 
became just " ".

Ian Ward



From kent at kentsjohnson.com  Fri Feb 24 08:21:38 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Fri, 24 Feb 2006 08:21:38 -0500
Subject: problem(s) with import from parent dir: "from ../brave.py import
	sir_robin"
In-Reply-To: <1140786637.451247.16210@e56g2000cwe.googlegroups.com>
References: <1140786637.451247.16210@e56g2000cwe.googlegroups.com>
Message-ID: <43ff03d4$1_3@newspeer2.tds.net>

per9000 wrote:
>>>>from raw2nice_def import raw2nice

> ----------
> 
> When I tried putting this into a program to execute command-line-style:
> 
> from raw2nice_def.py import raw2nice
> 
> output:
> 
>>"C:\another_bridge\python\python.exe" rawhtml2nicehtml_template.py
> 
> ['raw2nice_def.py', 'raw2nice_def.pyc', 'temp']
> Traceback (most recent call last):
>   File "C:my\holy\grail\that_old_bridge\rawhtml2nicehtml_template.py",
> line 10, in ?
>     from raw2nice_def.py import raw2nice
> ImportError: No module named raw2nice_def.py

Maybe it will work without the .py extension which is the correct form 
for an import (and what worked from the command line).

Kent


From nummertolv at gmail.com  Thu Feb 23 10:32:36 2006
From: nummertolv at gmail.com (nummertolv)
Date: 23 Feb 2006 07:32:36 -0800
Subject: Using repr() with escape sequences
Message-ID: <1140708756.484933.13390@z14g2000cwz.googlegroups.com>

Hi,

My application is receiving strings, representing windows paths, from
an external source. When using these paths, by for instance printing
them using str() (print path), the backslashes are naturally
interpreted as escape characters.

>>> print "d:\thedir"
d:	hedir

The solution is to use repr() instead of str():

>>> print repr("d:\thedir")
'd:\thedir'

What I have not been able to figure out is how to handle escape
sequences like \a, \b, \f, \v and \{any number} inside the paths. Using
repr() on these escape sequences either prints the hex value of the
character (if "unprintable" i guess) or some character ( like in the
last example below).

>>> print repr("d:\thedir\10")
'd:\thedir\x08'

>>> print repr("d:\thedir\foo")
'd:\thedir\x0coo'

>>> print repr("d:\thedir\100")
'd:\thedir@'

Could someone clear this out for me and let me know how I can find the
"real" path that I am trying to receive?

/Henrik



From larry.bates at websafe.com  Fri Feb 17 17:46:34 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Fri, 17 Feb 2006 16:46:34 -0600
Subject: Does python have an internal data structure with functions
	imported from a module?
In-Reply-To: <mailman.2070.1140211447.27775.python-list@python.org>
References: <mailman.2070.1140211447.27775.python-list@python.org>
Message-ID: <43F6524A.60202@websafe.com>

Carl J. Van Arsdall wrote:
> Alright, I attempted to post this question yesterday but I don't see it
> as showing up, so I apologize in advance if this is a double post.
> 
> Python Gurus:
> 
> Let me elaborate a bit more on this question.  Basically, I want to know
> if there is some data structure in python that maps a string function
> name to an address of a function or something to that nature.
> 
> If this is confusing, let me describe what I want to do and see if
> anyone has any ideas.
> 
> basically we have:
> 
>>>>def functA():
> ...  pass
> 
>>>> functA
> <function functA at 80db128>
> 
> And what I'd like to do is:
> 
>>>>__internalFuncDict__['functA']
> <function functA at 80db128>
> 
> This is just for a little experimental project of mine, any help or
> pointers to the proper pages in the manual would be greatly
> appreciated.  Basically, I know that I can create something like this if
> I have to but I was very much hoping that something already existed
> somewhere that I could get to via python or by writing a C extension.
> 
> Thanks in advance!
> 
> -carl
> 
I would do this as follows:

Create dictionary with the function names as keys and the pointer to
function definition as value:

def printFoo():
    print "Foo"
    return

def printFOO():
    print "FOO"
    return

fdict={'printFoo': printFoo, 'printFOO': printFOO}
functions=('printFoo', 'printFOO')
for function in function:
    if fdict.has_key(function: fdict[function]()
    else:
        print "No function named=%s defined" % function

-Larry Bates



From kent at kentsjohnson.com  Thu Feb  9 06:13:50 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Thu, 09 Feb 2006 06:13:50 -0500
Subject: module with __call__ defined is not callable?
In-Reply-To: <slrndum60m.10s.apardon@rcpc42.vub.ac.be>
References: <mailman.1580.1139367500.27775.python-list@python.org>
	<pan.2006.02.08.10.21.24.46790@REMOVETHIScyber.com.au>
	<43ea0efd$1@nntp0.pdx.net>
	<slrndum60m.10s.apardon@rcpc42.vub.ac.be>
Message-ID: <43eb1fad$1_3@newspeer2.tds.net>

Antoon Pardon wrote:

> This make me wonder. Would it be possible to do something with
> metaclasses so that after
> 
>      class SomeClass(MetaClass):
>         ...
> 
> SomeClass() will be equivalent to MetaClass.__call__(SomeClass)

I think that's already what happens. IIUC type.__call__ implements the 
standard class creation calling __new__ and __init__.

Kent


From mrstephengross at hotmail.com  Wed Feb 15 12:02:32 2006
From: mrstephengross at hotmail.com (mrstephengross)
Date: 15 Feb 2006 09:02:32 -0800
Subject: Embedding a binary file in a python script
References: <1140021879.698353.324230@o13g2000cwo.googlegroups.com>
	<f5n6v1h020td0rkf2p6tiq63ck63sii0o1@4ax.com>
Message-ID: <1140022952.353744.323780@g47g2000cwa.googlegroups.com>

Ok, this is a neat idea... The uu module deals with files though, not
strings. Is there a way in python to make a string act like a file
handle?

Example:

my_string = "uu-encoded-stuf......"
my_out_file_handle = ?? # What should this variable look like?
import uu
uu.decode(my_string, my_out_file_handle)
import tarfile
tarfile.open(my_out_file_handle)

Thanks again,
--Steve (mrstephengross at hotmail.com)



From claird at lairds.us  Sun Feb 19 12:08:26 2006
From: claird at lairds.us (Cameron Laird)
Date: Sun, 19 Feb 2006 17:08:26 GMT
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<roy-36D3DC.08084219022006@reader2.panix.com>
Message-ID: <q7imc3-00f.ln1@lairds.us>

In article <roy-36D3DC.08084219022006 at reader2.panix.com>,
Roy Smith  <roy at panix.com> wrote:
>DH <no at spam.com> wrote:
>> -python has true closures (although nothing like ruby's blocks)
>
>What is a "true closure"?  Or, maybe what I'm asking is what kind of 
>closure wouldn't be a true closure?  Is there some kind of ersatz closure 
>other language try to pass off, in violation of truth in closure laws?

It's an apt question.

What's a "true closure"?  That's the easiest part, in some ways:  
Wikipedia, for example, tells that it's "a function that refers
to free variables in its lexical context" <URL:
http://en.wikipedia.org/wiki/Closure_%28computer_science%29 >,
that is the context of the domain of the function's definition.

Some languages--Lisp, but also many others--definitely have it.
Basic definitely didn't.  Tcl ... well, after weeks of discussion
<URL: http://wiki.tcl.tk/closures >, the conclusion was that Tcl
almost has as much as it can, given that "lexical context" just
doesn't have much standing in Tclonia.  So, yes, George Mikan and
Allen Iverson both definitely played basketball, and well, but,
at the same time, it's useful to distinguish the things they do
with a ball.


From paul at boddie.org.uk  Wed Feb  1 12:45:41 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 1 Feb 2006 09:45:41 -0800
Subject: Python vs C for a mail server
References: <mailman.4249.1138728027.27774.python-list@python.org>
	<mailman.1300.1138734448.27775.python-list@python.org>
	<drqeda$i3u$1@wake.carmen.se>
Message-ID: <1138815941.496813.264030@z14g2000cwz.googlegroups.com>

Magnus Lycka wrote:
> In C++ it's the opposite. By demanding a particular type, we restrain
> ourself to using a set of values which is much smaller than the logic
> calls for, or we can throw away all type checks by e.g. casting to void
> pointers.

The main reason for evading the type system in such a severe fashion in
C++ is to break out of class hierarchies (noting that downcasting is
achievable in a slightly safer fashion). Ideally, one would design
class hierarchies in such a way that such break-outs are avoided, but
this can involve a lot of argument/discussion about design/architecture
that is mostly unnecessary with Python.

> I don't have enough experience with languages that provide interfaces,
> such as Java, to understand how useful they are, but it's my impression
> that they are too cumbersome to use fully.

My experience is the opposite: if one follows the recommended practices
with Java, the flavour of object-orientation employed is more
interface-oriented than anything else. Ages ago, there was a trend
towards describing class relationships using conformance rather than
inheritance; that there's still an incentive to rely more on
inheritance in Python-based systems has a lot to do with Python's
arguably better support for inheritance than Java, that doing away with
multiple inheritance in Java forced people to look at other ways to
model their information, and that conformance is typically dynamic and
implicit in Python anyway.

> As far as I understand, most Java APIs use types more than interfaces
> for parameters and return values. (I browsed the Java API docs at java.sun.com,
> and as far as I see, it seems the APIs always require parameters of distinct
> classes or types, and return values of particular types or classes.)

I can't comment on "most Java APIs", but if you look at established
packages like java.io and java.util, both are heavy on interface usage.

> I know that there have been attempts to provide interfaces in Python,
> and it seems Zope Interfaces are getting a decent following, but
> I don't think anyting like that will ever take the place that type
> declarations of all function and class declarations have in e.g.
> C++. It's too difficult to make interfaces so convenient and
> flexible that they could be used generally in Python without taking
> away a lot of power.

Generally, interfaces provide a fairly convenient means of expressing
the capabilities of objects whilst providing information that can be
useful, in conjunction with a suitably designed runtime environment, in
the generation of fairly well-optimised code. In a sense, what you say
about "taking away a lot of power" is highly appropriate: by imposing
an interface system on Python, it's quite likely that one could gain
performance and a certain measure of predictability whilst losing
certain dynamic aspects of the language. I personally wonder whether
it's worth speculatively imposing such prescriptive measures whose
burden is on the programmer and where the programmer is likely to spend
a lot of time trying to work around them.

Paul



From peter at engcorp.com  Sun Feb  5 15:04:32 2006
From: peter at engcorp.com (Peter Hansen)
Date: Sun, 05 Feb 2006 15:04:32 -0500
Subject: translating PHP to Python
In-Reply-To: <1139167762.095956.180350@g14g2000cwa.googlegroups.com>
References: <1139164228.608430.13120@g44g2000cwa.googlegroups.com>	<6ErFf.3267$MJ.1302@fed1read07>
	<1139167762.095956.180350@g14g2000cwa.googlegroups.com>
Message-ID: <ds5lo8$db8$1@sea.gmane.org>

Dave wrote:
> The second point won't work, though, because by parent class I mean,
> simply, the object that created the current object, *not* the class the
> current class is based on.

Good you clarified that, because "parent" definitely isn't used that way 
by most other people here.  And, in fact, there's no requirement that an 
instance (object) be involved in creating a new object.  Python allows 
functions that are not methods in a class.  What would you expect to 
happen if a mere function was doing the creating?

> So, for example:
> 
> class A(object):
>     def __init__(self):
>         self.thing = Thing()
>         self.thing.meth()
> 
>     def do_stuff(self):
>         print "Stuff"
> 
> class Thing(object):
>     def meth(self):
>         #now here's what I WANT
>         self.parent.do_stuff(args)
> 
> Is there a built in way to do this in Python, or do I have to pass
> "parent" when I init Thing?

It's pretty much standard to pass in references to the caller, or 
perhaps even more standard to pass in a callable, often in the form of a 
a "bound method" when an object's method is doing the calling.  On the 
other hand, what you are showing here is something that *would* normally 
be done with subclassing, and therefore with a parent class involved 
(using the conventional meaning of "parent").

class A(object):
     def __init__(self):
         self.do_stuff()


class Thing(A):
     def do_stuff(self):
         print "Stuff"


But since this was a contrived example, I can't really tell what would 
work best for you in your real use case.

-Peter



From tuvas21 at gmail.com  Sun Feb  5 22:50:50 2006
From: tuvas21 at gmail.com (Tuvas)
Date: 5 Feb 2006 19:50:50 -0800
Subject: Thread imbalance
In-Reply-To: <ds698k$n5l$2@bagan.srce.hr>
References: <1138912272.382474.13170@g44g2000cwa.googlegroups.com>
	<ds3d35$mo6$2@bagan.srce.hr>
	<mailman.1427.1139097680.27775.python-list@python.org>
	<ds55tb$n00$1@bagan.srce.hr>
	<lukcu19iaqamsm5ohs618ckp169csrq8ql@4ax.com>
	<ds698k$n5l$2@bagan.srce.hr>
Message-ID: <1139197849.994966.150810@z14g2000cwz.googlegroups.com>

The stuff that it runs aren't heavily processor intensive, but rather
consistant. It's looking to read incoming data. For some reason when it
does this, it won't execute other threads until it's done. Hmmm.
Perhaps I'll just have to work on a custom read function that doesn't
depend so much on processing power.



From jendroska at psychologie.uni-wuerzburg.de  Mon Feb 20 07:29:24 2006
From: jendroska at psychologie.uni-wuerzburg.de (Dirk Jendroska)
Date: Mon, 20 Feb 2006 13:29:24 +0100
Subject: Scientific Survey: Working Conditions in Open Source Projects
Message-ID: <43F9B624.80907@psychologie.uni-wuerzburg.de>

We like to invite you to a survey about the working conditions in 
Free/Open-Source Software development. This survey is conducted by the 
Open-Source Research Group of the University of W?rzburg (Germany).

We will compare work design in open source and proprietary software 
development. Our findings should be used to adjust the working 
conditions of software development to the needs of the developers. The 
results will be published under the Creative Commons License.

To start the survey, please click on the following link:
http://www.unipark.de/uc/open-source-task/

If you have any questions don't hesitate to contact us!
 
Dirk Jendroska
http://wy2x05.psychologie.uni-wuerzburg.de/ao/staff/jendroska.php?lang=en



From simon at brunningonline.net  Wed Feb 15 09:52:39 2006
From: simon at brunningonline.net (Simon Brunning)
Date: Wed, 15 Feb 2006 14:52:39 +0000
Subject: low level data types
In-Reply-To: <1140005257.773955.32860@g14g2000cwa.googlegroups.com>
References: <1140005257.773955.32860@g14g2000cwa.googlegroups.com>
Message-ID: <8c7f10c60602150652u14c64dcs49e0c11a65c6ec76@mail.gmail.com>

On 15 Feb 2006 04:07:37 -0800, dementrio <dementrio at gmail.com> wrote:
> How can I handle low-level data types in Python?
> What I want to do is writing an interface to a C daemon which waits for
> stuff like unsigned ints on a socket. For example, I need to craft and
> decode data structures that look like this:
>
> 32-bit unsigned int MSG_LENGTH
> 32-bit unsigned int MSG_CODE
> 64-bit signed int DATA
> 32-bit length + utf-8 characters STRING_DATA
> etc.
>
> What's the right way to do this in Python?

Look at the struct module.

--
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From Allerdyce.John at gmail.com  Sun Feb 26 14:55:54 2006
From: Allerdyce.John at gmail.com (Allerdyce.John at gmail.com)
Date: 26 Feb 2006 11:55:54 -0800
Subject: Do I need to convert string to integer in python?
Message-ID: <1140983754.000103.104710@i40g2000cwc.googlegroups.com>

Do I need to convert string to integer in python? or it will do it for
me (since dynamic type)?

In my python script, I have this line:
    x /= 10;

when i run it, I get this error:
TypeError: unsupported operand type(s) for /=: 'unicode' and 'int'

I want to divide x by 10 and assign that value back to x.

Thank you.



From raims at dot.com  Thu Feb 23 04:52:42 2006
From: raims at dot.com (Lawrence Oluyede)
Date: Thu, 23 Feb 2006 10:52:42 +0100
Subject: PyAtom, a Python module for creating Atom syndication feeds
References: <pan.2006.02.23.08.53.39.65246@hastings.org>
	<87mzgicute.fsf@voodoo.myself>
	<pan.2006.02.23.09.27.32.582881@hastings.org>
Message-ID: <87hd6qcsgl.fsf@voodoo.myself>

"Steve R. Hastings" <steve at hastings.org> writes:

> Why do you say this?  I don't think the code is perfectly polished and
> ready to be called version 1.0, but I think it follows PEP 8 more than not.

docstrings of method are messed up (why you begin them from the column 0?)

and

"
    Function Names

      Function names should be lowercase, with words separated by underscores
      as necessary to improve readability.

      mixedCase is allowed only in contexts where that's already the
      prevailing style (e.g. threading.py), to retain backwards compatibility.
"

you use ThisCase for methods, quit ugly IMHO

-- 
Lawrence - http://www.oluyede.org/blog
"Anyone can freely use whatever he wants but the light at the end
of the tunnel for most of his problems is Python"


From mackstevenson at hotmail.com  Sun Feb  5 12:10:04 2006
From: mackstevenson at hotmail.com (MackS)
Date: 5 Feb 2006 09:10:04 -0800
Subject: how to kill a python process?
Message-ID: <1139159404.912421.251960@g43g2000cwa.googlegroups.com>

Hello!

This question does not concern programming in python, but how to manage
python processes. Is there a way to "name" a python process? At least
on Linux, if I have two python programs running, they both run under
the name "python"

#pidof program1.py
[empty line]
#pidof program1.py
[empty line]
# pidof python
1249 854

Is there a way to make them run under their own names, e.g., to make it
easier to kill them by name using killall? Or am I stuck with
registering the pid of each python process I create and then refer to
that list whenever I need to selectively stop one of them? The latter
makes managing a long list of processes very cumbersome...

Thanks for any help!

Mack



From fredrik at pythonware.com  Thu Feb  2 06:03:34 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 2 Feb 2006 12:03:34 +0100
Subject: No subject
References: <001d01c627ad$afc5a930$6692a543@yourrtmejesvbc>
	<8c7f10c60602020235x861a571ybc879f086b3a9f9f@mail.gmail.com>
Message-ID: <drsou7$lsa$1@sea.gmane.org>

Simon Brunning wrote:

>> I just got a new computer and pyton 2.2 is on it and I have never heard of
>> it What is is for.
>
> Python is a programming language. It's (loosely speaking) an
> interpreted language - that is to say, any software written in Python
> needs the Python software around in order to work.
>
>> Should I keep it on my puter???????????????
>
> Yup. It's probably used by some of the vendor supplied tools, which
> will stop working if you remove Python.

there's also a FAQ about this:

    http://www.python.org/doc/faq/installed.html

</F> 





From tzot at sil-tec.gr  Tue Feb 14 02:50:42 2006
From: tzot at sil-tec.gr (Christos Georgiou)
Date: Tue, 14 Feb 2006 09:50:42 +0200
Subject: Tracking down memory leaks?
References: <1139749861.949765.282310@z14g2000cwz.googlegroups.com>
Message-ID: <kh12v15p15il41d7vohcr6m0n4qk4vbkeg@4ax.com>

On 12 Feb 2006 05:11:02 -0800, rumours say that "MKoool"
<mohankhurana at gmail.com> might have written:

>I have an application with one function called "compute", which given a
>filename, goes through that file and performs various statistical
>analyses.  It uses arrays extensively and loops alot.  it prints the
>results of it's statistical significance tests to standard out.  Since
>the compute function returns and I think no variables of global scope
>are being used, I would think that when it does, all memory returns
>back to the operating system.

Would your program work if you substituted collections.deque for the arrays
(did you mean array.arrays or lists?)?  Please test.

>Instead, what I see is that every iteration uses several megs more.
>For example, python uses 52 megs when starting out, it goes through
>several iterations and I'm suddenly using more than 500 megs of ram.

If your algorithms can work with the collections.deque container, can you
please check that the memory use pattern changes?

>Does anyone have any pointers on how to figure out what I'm doing
>wrong?

I suspect that you have more than one large arrays (lists?) that
continuously grow.

It would be useful if you ran your program on a fairly idle machine and had
a way to see if the consumed memory seems to be swapped out without being
swapped in eventually.
-- 
TZOTZIOY, I speak England very best.
"Dear Paul,
please stop spamming us."
The Corinthians


From invalidemail at aerojockey.com  Sat Feb 11 12:22:51 2006
From: invalidemail at aerojockey.com (Carl Banks)
Date: 11 Feb 2006 09:22:51 -0800
Subject: appending to a list via properties
In-Reply-To: <1hal7v6.1pa7ijfg3np46N%aleaxit@yahoo.com>
References: <1139605443.823899.141260@g47g2000cwa.googlegroups.com>
	<1139670699.632590.148760@g14g2000cwa.googlegroups.com>
	<1hal7v6.1pa7ijfg3np46N%aleaxit@yahoo.com>
Message-ID: <1139678571.008445.10100@g14g2000cwa.googlegroups.com>


Alex Martelli wrote:
> Carl Banks <invalidemail at aerojockey.com> wrote:
>    ...
> > >     class better_list (list):
> > >         tail = property(None, list.append)
> >
> > This is an impressive, spiffy little class.
>
> Yes, nice use of property.
>
> > growing_lists = foo,qux
> > while some_condition:
> >     for (s,x) in zip(growing_list,calculate_something()):
> >         list.append(s,x)
> >
> > No I don't really recommend it.
>
> Why not?  Seems OK.  Maybe simplified to:

Well, for this simple case I guess.  If you have a lot of lists, or
you're trying to write a general multiple list appender, it would be
fine.

Carl Banks



From johnjsal at NOSPAMgmail.com  Mon Feb 13 16:35:22 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 13 Feb 2006 21:35:22 GMT
Subject: how do you pronounce 'tuple'?
In-Reply-To: <0mt1v15ei7tg1mr0oclo703b6c92jr9vb4@4ax.com>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<mailman.1806.1139805039.27775.python-list@python.org>
	<0mt1v15ei7tg1mr0oclo703b6c92jr9vb4@4ax.com>
Message-ID: <uY6If.1611$No6.38089@news.tufts.edu>

Dave Hansen wrote:

> I've seen "route" pronounced "rout" or "root" depending on the
> background and mood of the speaker

I actually came up with a method that I use: "rout" for a verb, "root" 
for a noun. So Route 66 is Root 66, and routing an army is rOUTing an 
army.  :)


From lashkariNO at SPAMworldviz.com  Wed Feb 15 16:53:20 2006
From: lashkariNO at SPAMworldviz.com (Farshid Lashkari)
Date: Wed, 15 Feb 2006 13:53:20 -0800
Subject: How to import a module with spaces in the name
In-Reply-To: <mailman.1970.1140039404.27775.python-list@python.org>
References: <mailman.1970.1140039404.27775.python-list@python.org>
Message-ID: <MoNIf.11899$MJ.9067@fed1read07>

Gregory Pi?ero wrote:
> Let's say I have a module named "Excellent Module.py"

ExcellentModule = __import__('Excellent Module')

-Farshid


From bryce.cooper at gmail.com  Thu Feb 16 13:29:52 2006
From: bryce.cooper at gmail.com (Bryce Cooper)
Date: Thu, 16 Feb 2006 13:29:52 -0500
Subject: Installing python on lynxOS
Message-ID: <b5f2a96e0602161029x119f6d93l19690cb385533755@mail.gmail.com>

I'm trying to install python2.4.2 onto lynxOS 4.0.0. with gcc 2.95.3.  I was
wondering if anyone who has done this before could give me some pointers.

I'm currently getting the following error when running make:

    gcc -o python Module/python.o libpython2.4.a -lsocket -lm
    called2:ld returned 1 exit status
    libpython2.4.a(pystate.o):In function 'PyThreadState_New':
Python2.4.2/pystate.c:191:
undefined reference to '_PyGILState_NoteThreadState'
    called2:ld returned 1 exit status

I checked pystate.c and the function _PyGILState_NoteThreadState is defined
in the file, so I'm a bit lost here.

--
Bryce
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From martijn at gamecreators.nl  Wed Feb  8 09:45:30 2006
From: martijn at gamecreators.nl (martijn at gamecreators.nl)
Date: 8 Feb 2006 06:45:30 -0800
Subject: only a simple xml reader <tag:id>value</tag:id>
In-Reply-To: <1139409218.480843.317570@g43g2000cwa.googlegroups.com>
References: <1139387993.478950.76410@g44g2000cwa.googlegroups.com>
	<1139409218.480843.317570@g43g2000cwa.googlegroups.com>
Message-ID: <1139409929.944215.203740@z14g2000cwz.googlegroups.com>

I'm newbie with that xml stuff.

The only thing I must read is the response I get from a EPP server.
A response like this:

<?xml version="1.0" encoding="UTF-8"?>
<epp xmlns=" http://www.eurid.eu/xml/epp/epp-1.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:contact="http://www.eurid.eu/xml/epp/contact-1.0"
xmlns:domain="http://www.eurid.eu/xml/epp/domain-1.0"
xmlns:eurid="http://www.eurid.eu/xml/epp/eurid-1.0"
xmlns:nsgroup="http://www.eurid.eu/xml/epp/nsgroup-1.0"
xsi:schemaLocation="http://www.eurid.eu/xml/epp/epp-1.0 epp-1.0.xsd
http://www.eurid.eu/xml/epp/contact-1.0 contact-1.0.xsd
http://www.eurid.eu/xml/epp/domain-1.0 domain-1.0.xsd
http://www.eurid.eu/xml/epp/eurid-1.0 eurid-1.0.xsd
http://www.eurid.eu/xml/epp/nsgroup-1.0 nsgroup-1.0.xsd">
<response>
<result code="1500">
<msg>Command completed successfully; ending session</msg>
</result>
<resData>
<domain:appData>
<domain:name>c-and-a.eu</domain:name>
<domain:reference> c-and-a_1</domain:reference>
<domain:code>2565100006029999</domain:code>
<domain:crDate>2005-11-08T14:51:08.929Z</domain:crDate>
</domain:appData>
</resData>
<extension>
<eurid:ext>
<eurid:result>
<eurid:msg>OK</dnsbe:msg>
</eurid:result>
</eurid:ext>
</extension>
<trID>
<clTRID>clientref-12310026</clTRID>
<svTRID>eurid-1589</svTRID>
</trID>
</response>
</epp>
----------------
//<result code="1500">
//<msg>Command completed successfully; ending session</msg>

what is the official/best way to handle/parse such xml response ?

Thats maybe a better question



From markleeds at verizon.net  Mon Feb 27 14:56:35 2006
From: markleeds at verizon.net (MARK LEEDS)
Date: Mon, 27 Feb 2006 11:56:35 -0800
Subject: newbie : econometrics in python
Message-ID: <000801c63bd7$ea5dc8a0$2f01a8c0@m8d4477f3de884>

i've used python in the past but only for data processing, writing to files, midifying files,
reading from files. now, my boss wants me to do some econometrics using python.

would anyone who has done this ( var, vecm, cointegration, ols, kalman filter whatever ) mind
sending me some sample code that i could use as a template.

i've spent 2 days, going through numpy, scipy, pytrix etc and i still
can't figure it out. thanks.

                                                        mark
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From raims at dot.com  Sun Feb 26 18:50:03 2006
From: raims at dot.com (Lawrence Oluyede)
Date: Mon, 27 Feb 2006 00:50:03 +0100
Subject: SyntaxError: can't assign to a function call
References: <1140997057.610226.101220@u72g2000cwu.googlegroups.com>
Message-ID: <87psl97k9g.fsf@voodoo.myself>

"Fuzzyman" <fuzzyman at gmail.com> writes:

>>>> f() += [4]
> SyntaxError: can't assign to function call
>>>> 

It's obvious that that line gives you a syntax error. += is the increment
operator overloaded for strings and lists and so on. It changes the lhs in
place appending the rhs. In this case the rhs is a function call so... how the
compiler knows how to assign to a function call?

Do the things easily:

- x = f()
- x += [4]

:)

-- 
Lawrence - http://www.oluyede.org/blog
"Anyone can freely use whatever he wants but the light at the end
of the tunnel for most of his problems is Python"


From collinw at gmail.com  Fri Feb 10 12:13:40 2006
From: collinw at gmail.com (Collin Winter)
Date: Fri, 10 Feb 2006 18:13:40 +0100
Subject: [ANN] functional 0.5 released
Message-ID: <43aa6ff70602100913r6d896f16vef201d5d4099608d@mail.gmail.com>

Hello all,

I have released version 0.5 of my functional module, a collection of
higher-order and functional programming tools for Python. Currently
offered are tools for function composition, partial function
application, plus flip, foldl, foldr, scanl and scanr functions.

Two version of the release are available: one is written in pure
Python and aims for maximum readability and portability. The other is
coded as a C extension module and is focused on raw performance.

Where to get it:
#########

functional is available at

http://oakwinter.com/code/functional/

and from the Python Package Index at

http://cheeseshop.python.org/pypi/functional.

Both source tarballs and Python Eggs are available for both the pure
Python and C releases. I'm open to user-contributed RPM, Deb or other
packagings.

Release Notes
########

The biggest news in this release is the addition of the C
implementation. Also, a number of functions were removed, as I had
unknowingly duplicated a lot of functionality from the itertools
module.

As always, feedback welcome!

Collin Winter


From carsten at uniqsys.com  Fri Feb  3 13:41:08 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 03 Feb 2006 13:41:08 -0500
Subject: MySQLdb question... using table name as arg
In-Reply-To: <%cNEf.19800$sA3.14913@fed1read02>
References: <%cNEf.19800$sA3.14913@fed1read02>
Message-ID: <1138992068.11050.39.camel@dot.uniqsys.com>

On Fri, 2006-02-03 at 13:24, Sean Berry wrote:
> I have four tables that all have the same column names (50 in each.)
> 
> I have created an admin program to edit, delete and add records to the 
> tables and would like to use the table name as a variable in each query so 
> the code can be used for each of the 4 tables.  Usually I would do something 
> like this by having 1 table with special column to categorize the records as 
> I am doing with each table, but this specific application requires that I do 
> it with 4 tables instead.
> 
> To ensure that string are quoted properly without any hassle I use the 
> execute function like so assuming c is my cursor object...
> 
> c.execute("update tableName set col1 = %s, col2 = %s, col3 = %s, ...", 
> (val1, val2, val3, ...))
> 
> But, not I want to do this with a variable tableName.  If I add it to the 
> tuple of parameters in the second arg before val1 and replace tableName with 
> %s, then the tableName will be quoted in the query, causing an error.
> 
> What is the best (easiest) way for me to accomplish this?  I know it may be 
> a stupid question but I just can't figure it out.

As you have discovered, the table name is not allowed to be a parameter.
You have to build the query string for the appropriate table, then hand
it to execute for filling in the actual parameters:

queryString = "update "+tableName+" set col1=%s, col2=%s,..."
c.execute(queryString, (val1, val2,...))

HTH,

Carsten.




From steve at REMOVETHIScyber.com.au  Sat Feb 18 20:32:12 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sun, 19 Feb 2006 12:32:12 +1100
Subject: Multiplication optimization
References: <1140310118.365847.111120@g14g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.19.01.32.12.294576@REMOVETHIScyber.com.au>

On Sat, 18 Feb 2006 16:48:38 -0800, Paul McGuire wrote:

> Does Python's run-time do any optimization of multiplication
> operations, like it does for boolean short-cutting?

Do you know that these shortcuts are optimizations, or are you just
assuming it takes less time to do the comparison than it would for the
CPU to blast bits around?

I have no idea whether your shortcuts are optimizations or pessimizations.
I'm just asking whether you know, or if you are making assumptions.


-- 
Steven.



From kay.schluehr at gmx.net  Fri Feb 24 09:45:59 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 24 Feb 2006 06:45:59 -0800
Subject: Python vs. Lisp -- please explain
In-Reply-To: <87r75uz3wb.fsf@wilson.homeunix.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com> <43fbc788@usenet01.boi.hp.com>
	<87u0ar3gba.fsf@wilson.homeunix.com>
	<pan.2006.02.22.11.35.14.90948@REMOVETHIScyber.com.au>
	<1140612537.685150.68330@o13g2000cwo.googlegroups.com>
	<7xu0arbkwd.fsf@ruckus.brouhaha.com>
	<1140614911.243300.67200@g47g2000cwa.googlegroups.com>
	<1140617119.964479.200780@g44g2000cwa.googlegroups.com>
	<1140639827.967115.169180@g44g2000cwa.googlegroups.com>
	<1140692367.189942.50520@z14g2000cwz.googlegroups.com>
	<87r75uz3wb.fsf@wilson.homeunix.com>
Message-ID: <1140792359.326775.106500@u72g2000cwu.googlegroups.com>


Torsten Bronger wrote:
> Hall?chen!
>
> "Paul Boddie" <paul at boddie.org.uk> writes:
>
> > Kay Schluehr wrote:
> >
> >> I would say yes, it is still "proper Python" in that each RPython
> >> program is also a CPython program.
> >
> > I suppose it depends on which direction you're coming from, in
> > that many Python programs just wouldn't be able to run in
> > RPython. But then I can understand the convenience of having a
> > subset of Python that is executable by CPython, but which can also
> > be inspected and processed for other purposes, and whose programs
> > maintain their semantics in both situations.
>
> I'm still afraid of the following scenario: Eventually, people might
> regard "RPython plus type declarations" (or something similar) as
> first-class Python because it's faster and runs on more
> implementations, so they try to stick to it.  So effectively you
> would have changed Python.

I wonder why you believe that it would run on more platforms? This
assertion is justifiable with regard of tiny target hardware - but
else? I do think that "RPython++" could be a viable replacement for C
as a systems programming language BECAUSE it is connected closely to
Python. It is a kind of upside-down evolution: a low level language
emerges from a more high level language. We currently know only the
other side of the story. RPython would just be the common denominator
or the language interface. Gilad Bracha suggested optional type systems
for dynamic languages[1] but as it seems to me RPython would be a fine
candidate for a declarative layer, not Python.

> Maybe I misunderstood something because I could not follow all of
> Kay's text but I think one should not change Python or create a
> look-alike to allow for better implementations.  The language should
> fit my brain rather than an implementation.

It should first of all fit the diversity of a programmers needs. C was
never considered as a hostile brother of Python so why should it be
Pythons own son?

Kay



From girodt at gmail.com  Mon Feb 13 21:37:23 2006
From: girodt at gmail.com (Thomas Girod)
Date: 13 Feb 2006 18:37:23 -0800
Subject: listing attributes
Message-ID: <1139884643.749492.221140@g43g2000cwa.googlegroups.com>

Hi there.

I'm trying to get a list of attributes from a class. The dir() function
seems to be convenient, but unfortunately it lists to much - i don't
need the methods, neither the built-in variables.

In fact, all my variables are referencing to objects of the same type.
Can anyone suggest me a way to get this list of variables ?

Thanks

Thomas



From lycka at carmen.se  Sun Feb  5 17:24:27 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Sun, 05 Feb 2006 23:24:27 +0100
Subject: translating PHP to Python
In-Reply-To: <mailman.1449.1139169883.27775.python-list@python.org>
References: <1139164228.608430.13120@g44g2000cwa.googlegroups.com>	<6ErFf.3267$MJ.1302@fed1read07>	<1139167762.095956.180350@g14g2000cwa.googlegroups.com>
	<mailman.1449.1139169883.27775.python-list@python.org>
Message-ID: <ds5tur$a3$2@wake.carmen.se>

Peter Hansen wrote:
> Good you clarified that, because "parent" definitely isn't used that way 
> by most other people here. 
Unless they are coding GUIs? I guess it's pretty common that GUI
controls are contained in other controls called parents. At least
that's how it's done in wxPython.


From fuzzyman at gmail.com  Sat Feb 18 08:23:09 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 18 Feb 2006 05:23:09 -0800
Subject: Movable python Trial Version
In-Reply-To: <mailman.2091.1140266787.27775.python-list@python.org>
References: <1140265482.657543.193060@z14g2000cwz.googlegroups.com>
	<mailman.2091.1140266787.27775.python-list@python.org>
Message-ID: <1140268989.867644.86720@z14g2000cwz.googlegroups.com>


Felipe Almeida Lessa wrote:
> Em S?b, 2006-02-18 ?s 04:24 -0800, Fuzzyman escreveu:
> > It is set to expire on the 22nd May, and displays a nag screen on
> > startup. Other than that, it is the full version. Have fun.
>
> Attached is the cracked version with no expiration limit and my own
> bitmap on the startup. Enjoy!
>

I'm sure it wouldn't be that hard to do. Seriously not worth the effort
though. ;-)

Fuzzy


> > Fuzzyman
> > http://www.voidspace.org.uk/python/index.shtml
>
> Just kidding ;-),
> Felipe.
>
> --
> "Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
> outros povos sem travar batalha, toma cidades fortificadas dos outros
> povos sem as atacar e destr?i os estados dos outros povos sem lutas
> prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
> 'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
> poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."
> 
>   -- Sun Tzu, em "A arte da guerra"



From steve at holdenweb.com  Wed Feb 15 22:42:30 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 15 Feb 2006 22:42:30 -0500
Subject: urllib, caching
In-Reply-To: <1140049993.104394.25290@o13g2000cwo.googlegroups.com>
References: <1140049993.104394.25290@o13g2000cwo.googlegroups.com>
Message-ID: <43F3F4A6.4020708@holdenweb.com>

AndrewJ wrote:
> I've got code:
> 
>  f= urllib.urlopen("http://www.stuff/nb5.php") ;
> 
> This connects to a page that changes in real time. Works ok, and
> retrieves the data the first time.
> 
> But then any subsequent calls all return the same data, even though the
> web page itself has changed.
> 
> Is there caching going on here? How do I turn it off ?
> 
You can call urllib.urlcleanup() to clear the cache.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From steve at REMOVETHIScyber.com.au  Fri Feb  3 11:36:02 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sat, 04 Feb 2006 03:36:02 +1100
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<drvd56$nb3$1@wake.carmen.se>
	<1138967463.440194.184710@g49g2000cwa.googlegroups.com>
	<pan.2006.02.03.12.32.47.209717@REMOVETHIScyber.com.au>
	<1ha6a71.10mos5m9evcy8N%aleaxit@yahoo.com>
Message-ID: <pan.2006.02.03.16.36.01.448835@REMOVETHIScyber.com.au>

On Fri, 03 Feb 2006 07:40:38 -0800, Alex Martelli wrote:

> Steven D'Aprano <steve at REMOVETHIScyber.com.au> wrote:
>    ...
>> > Why shouldn't
>> >   def self.x():
>> > declare two new identifiers ("x" and "self"), too?
>> 
>> Sure, but now the call foo.bar
> 
> "call"?

Call? Who said anything about a call?

*wink*

Okay, poor choice of words. I'm not exactly sure what a better choice
would be. Token? Too specific. Maybe it would have been better to just
have just said "...but now foo.bar has ...".


>> has special meaning inside a def statement
>> than elsewhere. Elsewhere, foo.bar is an attribute access, looking up
>> attribute bar in foo's namespace.
> 
> or setting it, as in foo.bar=23, 

Conceptually, both setting and getting an attribute involves a "look up"
in the general sense: you need to look up the attribute to get its value,
or to find out where to put its value. You are correct (of course!) that
foo.bar can either be a get or a set, but I'm doing lots of hand-waving
here and I didn't think it was necessary to get bogged down in too much
detail.

> or setting both names, as in
> 
> import foo.bar

Ah, I completely forgot about import. But see below.


>> Using your syntax, in a def statement
>> foo.bar is a pair of declarations: it declares a name "foo", and it
>> declares a second name "bar".
> 
> "declares" isn't really pythonic -- let's talk about binding or setting
> names, instead.

Yes, you're right, it is a bad habit. Years of Pascal don't die easily.



>> This inconsistency is, I think, worse than the implicit use of self.
> 
> I don't think there's any inconsistency in deciding that syntax x.y has
> different meanings (as to what gets looked up or bound) in different
> contexts, because it already does: mostly "look up y in namespace x",
> but in x.y=... it's "bind y in namespace x" 

Which from my perspective are conceptually two sides of the coin. The
model I have is "y" is a label in some namespace x, and you have to (in
some sense) look up where "y" should go regardless of whether you are
setting the value or getting the value.

Do you think this model is so far from the actual behaviour of Python that
it is useless? Or is it fair to lump getting and setting attributes/names
together?


> and in "import x.y" it's
> "bind x AND then bind y in namespace y".

I assume that's a typo and you mean "bind y in namespace x".

But even "import x.y" is conceptually a lookup, equivalent to x.y =
__import__("x.y"), with the understanding that x = __import__("x") is
automagically run first.

[hand-waving, hand-waving, hand-waving... of course imports do a lot more
than just setting a name in a namespace]

But in all three of:

foo.bar = something
something = foo.bar
import foo.bar

the hierarchy goes from left to right, with bar being "inside" foo, for
some meaning of inside. The Original Poster's syntax would reverse that,
with def foo.bar(x,y) creating parameter foo "inside" method bar.



-- 
Steven.



From crutcher at gmail.com  Sun Feb 26 13:49:48 2006
From: crutcher at gmail.com (Crutcher)
Date: 26 Feb 2006 10:49:48 -0800
Subject: xslt queries in xml to SQL queries
In-Reply-To: <1140957244.112245.53620@j33g2000cwa.googlegroups.com>
References: <VS6Mf.7461$vC4.7447@clgrps12>
	<1140931098.472396.50620@i39g2000cwa.googlegroups.com>
	<1140957244.112245.53620@j33g2000cwa.googlegroups.com>
Message-ID: <1140979788.315040.285240@t39g2000cwt.googlegroups.com>

> I don't know what it is with comp.lang.python/python-list these days
> and the cheap put-downs. Unless you know the person you're responding
> to personally, and thus the above counts as some kind of banter, you
> would do better to keep the insults to yourself.

You are completely right, I was overly familiar.

Let me restate my central thesis.

1) It is possible to do what he is asking to do.
2) It requires expert knowledge of XSLT to do it well, and then it
would still require a bit of work.
3) There are simpler ways to do it, both using and not using xslt, than
this.

You could also do something like this:

<options ...>
  <sql-hack query="select name from servers">
    <option><sql-value value="name"></option>
    </sql-hack>
  </options>

and then do an XPath search for sql-hack nodes, and process them with
your python.

If you are happy staying on the python ranch, you could even do this:

<options ...>
  <python><![CDATA[
rows = sql('select names from servers')
for row in rows:
  xml('<option>%s</option>' % row[0])
    ]]>
    </python>
  </options>

With this, you find the python sections, and exec them in a context
with sql defined to do queries against your db and xml defined to parse
the xml you give it, and emit it in place of the python element.


> But given the existence of XML database systems,
> I don't think the idea of accessing them (or things pretending to be like them)
> via XML technologies is outrageous at all.

No, not outrageous. But this wasn't about quering XML database systems.
This was about implementing something which looked like, but did not
act like, XSLT. It's just bad design.



From erdewit at d-e-l-e-t-e.zonnet.nl  Tue Feb 14 05:50:15 2006
From: erdewit at d-e-l-e-t-e.zonnet.nl (Ewald R. de Wit)
Date: Tue, 14 Feb 2006 04:50:15 -0600
Subject: cyclic data structures
References: <Nc6If.1604$No6.38177@news.tufts.edu>
Message-ID: <CfOdnYR-goR6KGzenZ2dnUVZ8tydnZ2d@casema.nl>

John Salerno wrote:
> I'm having some slight trouble understanding exactly why this creates an 
> infinite loop:
>
> L = [1, 2]
> L.append(L)

I tried this with Python 2.3.5 and it handles this tailbiter in a
very pleasantly surprising way:

>>> l = [ 0, 1 ]
>>> l.append( l )
>>> l
[0, 1, [...]]
>>> l[2]
[0, 1, [...]]
>>> l[2][2][2][2][2][2][2][0]
1

The [...] I have never seen before anywhere, is it documented?

--
  --  Ewald

 


From fredrik at pythonware.com  Fri Feb  3 06:46:07 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 3 Feb 2006 12:46:07 +0100
Subject: would it be feasable to write python DJing software
References: <1138925819.465108.181760@o13g2000cwo.googlegroups.com><druc1r$cre$1@bagan.srce.hr><1138962918.427815.70300@g14g2000cwa.googlegroups.com><drvdq6$gjq$1@bagan.srce.hr><1138966084.385205.254410@g14g2000cwa.googlegroups.com>
	<drvf4m$t79$1@bagan.srce.hr>
Message-ID: <drvfq1$pu7$1@sea.gmane.org>

Ivan Voras wrote:

> > Come to that, you're **really** doing it in machine code...
>
> I've yet to see someone calling
>
> if a == '5':
>      print "it's 5"
>
> machine code. It's the distinction on which level the program's logic is
> implemented, not at which level it's executed.

uhuh?  so why did you just argue that

    if foo.bar():
        bar.aba()

means "doing it in C" if bar and aba happens to be parts of an extension
library ?

</F>





From hinnc at yahoo.com  Thu Feb  9 15:45:59 2006
From: hinnc at yahoo.com (slogging_away)
Date: 9 Feb 2006 12:45:59 -0800
Subject: Too Many if Statements?
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<6e2iu1hdb8fvlfkcuulloiiq1khlbhret1@4ax.com>
Message-ID: <1139517959.741090.28560@g14g2000cwa.googlegroups.com>

It appears it may not be a 'if' statment limitation at all.  This is
because I added another 800 element array in which to store the various
error messages generated when a configuration file error is deteceted
based on their severity level.  The simple addition of the array caused
the same symptom stated in the initial posting.  This additional array
was removed and the script performs as expected.  Adding it back in
cause it to not run - no error message - just a return to the >>> in
the IDLE console window much as if I had executed the 'Check Module'
command.

At this point I guess I'll find another way work around this issue via
some of the previously suggested methods , etc.  It appears to be a bug
as far as I can tell.



From physci at gmail.com  Sun Feb 26 17:40:56 2006
From: physci at gmail.com (physci at gmail.com)
Date: 26 Feb 2006 14:40:56 -0800
Subject: wxGlade, wxPython.... pyOpenGL wxWidget?
Message-ID: <1140993655.993069.196880@u72g2000cwu.googlegroups.com>

I've been combing google for the past week trying to find an
appropriate set of tools for a project I'm working on.  Simply put,
what I need is a GUI, powered by python, (I really don't want to touch
any C++ code at all), that has an openGL canvas/scene(?), with a python
interpreter sitting beside it.  The whole thing should be resizable,
and the display (not full screen) should be commanded by user
interaction with the interpreter (like the boa-constructor
interpreter), where the whole app resides in one window.

What would be ideal for me is an "OpenGL wxWidget(?)" that can be
imported into wxGlade or Boa.  ((Qt has a thing called glViewer (Which
I got really excited about, but can't find a way for python to talk
with it)))

note: This should be cross-platform, MacOSX / Windows / Linux.

I feel bad posting this because there is already so much discussion on
the topic, however my brain is trying to escape, and I could only
appease it by sending this missive.



From hancock at anansispaceworks.com  Tue Feb 21 14:20:56 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Tue, 21 Feb 2006 13:20:56 -0600
Subject: Augmented assignment
In-Reply-To: <dte88n$568$2@home.itg.ti.com>
References: <dte88n$568$2@home.itg.ti.com>
Message-ID: <20060221132056.62470312@samwise.anansi>

On Tue, 21 Feb 2006 10:55:42 +0530
Suresh Jeevanandam <jm.suresh at gmail.com> wrote:
> 	Is there any gain in performance because of
> 	augmented assignments.
> 
> 	x += 1  vs x = x+1

Yep. I perform better when I only type names once.
Especially if they are long:

length_of_object_I_must_describe_very_carefully += 1

vs

length_of_object_I_must_describe_very_carefully = length_of_object_I_must_describe_very_carefully + 1

Oh, you mean performance of the computer? ;-)

But Python is all about optimizing the
performance of programmers, not computers!

Seriously,
I think they are usually equivalent internally,
at least for immutable objects.

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From grflanagan at yahoo.co.uk  Sun Feb 26 17:36:48 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 26 Feb 2006 14:36:48 -0800
Subject: TypeError when subclassing 'list'
In-Reply-To: <mailman.2458.1140993038.27775.python-list@python.org>
References: <1140992122.723907.263990@z34g2000cwc.googlegroups.com>
	<mailman.2458.1140993038.27775.python-list@python.org>
Message-ID: <1140993408.020744.250760@i39g2000cwa.googlegroups.com>


Steve Juranich wrote:
> Gerard Flanagan wrote:
>
> > Hello all
> >
> > Could anyone shed any light on the following Exception? The code which
> > caused it is below.  Uncommenting the 'super' call in 'XmlNode' gives
> > the same error. If I make XmlNode a subclass of 'object' rather than
> > 'list' then the code will run.
> ...
> > Code:
> >
> > from elementtree.SimpleXMLWriter import XMLWriter
> >
> > class XmlNode(list):
> >     tag = None
> >     attrib = None
> >     value = None
> >     def __init__(self, tag, **attrib):
> >         #super(list, self).__init__()
> >         self.tag = tag
> >         self.attrib = attrib
>
> I haven't put a lot of study into what you've done, but right off the bat,
> your use of "super" is incorrect.  It should look like:
>
>   super(XmlNode, self).__init__()
>
> Not sure if that will fix your problem, though.
>
> --
> Steve Juranich
> Tucson, AZ
> USA

Thanks Steve, but no - same error.

Gerard



From deets at nospam.web.de  Sun Feb 26 15:36:48 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 26 Feb 2006 21:36:48 +0100
Subject: How can I find the remainder when dividing 2 integers
In-Reply-To: <1140985687.324979.153730@e56g2000cwe.googlegroups.com>
References: <1140984473.723258.70050@e56g2000cwe.googlegroups.com>
	<46egiuFanujjU2@uni-berlin.de>
	<1140985687.324979.153730@e56g2000cwe.googlegroups.com>
Message-ID: <46ehr1FarmcsU1@uni-berlin.de>

silverburgh.meryl at gmail.com schrieb:
> okay, I try you suggestion, and re-write my code like this:
> colors = ["#ff0000", "#00FF00", "#0000FF"]
> colorIndex = 0
> 
> def getText(nodelist):
> 
> 
>              for str in strings:
> 
>                      print colors[colorIndex  % colors.length]
>                      colorIndex += 1
> 
> but i get this error:
>    print colors[colorIndex  % colors.length]
> UnboundLocalError: local variable 'colorIndex' referenced before
> assignment

If I take your code, it works for me.

Diez


From bronger at physik.rwth-aachen.de  Fri Feb 17 11:57:16 2006
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 17 Feb 2006 17:57:16 +0100
Subject: Evil, evil wxPython (and a glimmer of hope)
References: <1140116551.116322.12680@g43g2000cwa.googlegroups.com>
	<8764ned5ib.fsf@rose.polar.local>
	<1140162638.200378.199010@g44g2000cwa.googlegroups.com>
	<1140174946.948658.186160@g47g2000cwa.googlegroups.com>
	<1140180680.326797.69740@g43g2000cwa.googlegroups.com>
	<1140189486.898380.245900@g14g2000cwa.googlegroups.com>
	<1140195001.515958.292420@g14g2000cwa.googlegroups.com>
Message-ID: <87vevdsz2r.fsf@wilson.homeunix.com>

Hall?chen!

"Fuzzyman" <fuzzyman at gmail.com> writes:

> vivainio at gmail.com wrote:
>
>> vivainio at gmail.com wrote:
>>
>> [...]
>>
>> Ok, after brief eyeballing & experimenting, it appears that Wax
>> is just what I was looking for. The code is simple, concise and
>> trivially understandable, the level of wrapping seems about
>> right, and examples are helpful.
>>
>> [...]
>
> That's good news. I'm about to start using Wax on a couple of
> small(ish) projects - so it's nice to know about other users.

Has Wax exceeded the critical mass so that one can be quite certain
that it will still be maintained, say, next year?  (Sincere question
since I don't know.)

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus            ICQ 264-296-646


From sybrenUSE at YOURthirdtower.com.imagination  Tue Feb 14 04:32:34 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Tue, 14 Feb 2006 10:32:34 +0100
Subject: Python / Apache / MySQL
References: <1139907519.427789.188760@g14g2000cwa.googlegroups.com>
Message-ID: <slrndv38ti.7rh.sybrenUSE@schuimige.unrealtower.org>

vpr enlightened us with:
> I want to build an Website using Apache / Python and MySQL.

I second Bruno: swap MySQL in favour of PostgreSQL.

> e.g. should I be using mod_python ?

You could use my framework based on mod_python and Cheetah. I find it
really easy to use. Check out http://www.unrealtower.org/webengine

> whats the best module for mysql ?

I'd use SQLObject. It can handle MySQL (if you really want to stick to
it), SQLite and PostgreSQL.

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From klachemin at comcast.net  Wed Feb  1 17:41:05 2006
From: klachemin at comcast.net (Kamilche)
Date: 1 Feb 2006 14:41:05 -0800
Subject: PIL and transparent GIFs
In-Reply-To: <43e12849$0$1145$7a628cd7@news.club-internet.fr>
References: <43e12849$0$1145$7a628cd7@news.club-internet.fr>
Message-ID: <1138833665.400460.232350@f14g2000cwb.googlegroups.com>

It can only read transparency, it can't write it. I went looking and
found that out a couple weeks ago.



From felipe.lessa at gmail.com  Sun Feb 12 08:06:29 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sun, 12 Feb 2006 11:06:29 -0200
Subject: Is python very slow compared to C
In-Reply-To: <1139747631.858424.145230@z14g2000cwz.googlegroups.com>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
	<1139743205.985196.254330@g43g2000cwa.googlegroups.com>
	<mailman.1776.1139745557.27775.python-list@python.org>
	<1139747631.858424.145230@z14g2000cwz.googlegroups.com>
Message-ID: <1139749589.3967.16.camel@kenshin>

Em Dom, 2006-02-12 ?s 04:33 -0800, bonono at gmail.com escreveu:
> Felipe Almeida Lessa wrote:
> > Em Dom, 2006-02-12 ?s 03:20 -0800, bonono at gmail.com escreveu:
> > > However, to me, the strength of python is the batteries that is
> > > included(and there are more and more coming).
> >
> > So .NET is as good as Python? Hmmm... I think the language itself is the
> > best part of Python, its library is just a complement (a very good and
> > relevant one, though).
> .NET is not a language, IMO.

You talked about "batteries included", and that isn't related to the
language. I said .NET in reference to what you said. The part about the
language is my own opinion, I just didn't want to say anything about C#,
Boo, J#, Nemerle or any other language that targets the .NET framework.
In the case of Python, as well as Java, the language has the same name
as the framework, and this may have lead you to mistake me.

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From martin at v.loewis.de  Wed Feb  8 14:04:10 2006
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 08 Feb 2006 20:04:10 +0100
Subject: Python 2.4.2 using msvcrt71.dll on Win and compatibility issues
In-Reply-To: <dscann$29j$1@online.de>
References: <dsaqcf$jb5$1@online.de> <43E8F864.6050605@v.loewis.de>
	<dsb2nn$5qs$1@online.de> <43E922D0.4080407@v.loewis.de>
	<dscann$29j$1@online.de>
Message-ID: <43ea40aa$0$6793$9b622d9e@news.freenet.de>

Christoph Zwerschke wrote:
> I think this would only shift the problem. Because then I would have to
> convert the msvcr71 stream I get from Python to a msvcrt stream. Using
> fileno() (of msvcrt) to get the file descriptor will probably not work.

It actually would:

#define _fileno(_stream)  ((_stream)->_file)

This definition is the same in all CRT version, plus the _file member
is at the same offset in all CRT versions. Microsoft apparently wants
to support linkage of object files build with one CRT version against
a different CRT version.

It *is* hacky, of course.

> But thanks a lot for your help. Sometimes you don't know whether you're
> doing something terribly wrong or missing a very easy solution if you
> don't discuss with others.

Right. I come more and more to the conclusion that you shouldn't really
be using the CRT on Win32.

Anyway, I just proposed to have Python 2.5 link against msvcrt.dll
on python-dev, and got mixed responses.

Regards,
Martin


From ziggy at fakedaddress.com  Mon Feb 13 20:04:58 2006
From: ziggy at fakedaddress.com (ziggy)
Date: Tue, 14 Feb 2006 01:04:58 GMT
Subject: Jedit
Message-ID: <ziggy-358301.20045813022006@netnews.asp.att.net>

Just wondering if there is something out there like Jedit, but written 
in python ( not just supporting, but actually written in it.. )

Nothing large like Stanzi's or Boa.. Just something quick and simple, 
with code completion, and a debugger..


From joel.hedlund at gmail.com  Wed Feb  8 05:03:15 2006
From: joel.hedlund at gmail.com (Joel Hedlund)
Date: Wed, 08 Feb 2006 11:03:15 +0100
Subject: Best way of finding terminal width/height?
In-Reply-To: <11uhodjciifej02@corp.supernews.com>
References: <96nFf.43896$d5.199922@newsb.telia.net>
	<11uc3dohfitotc5@corp.supernews.com>
	<jysFf.155352$dP1.513537@newsc.telia.net>
	<11udc0r2bq11042@corp.supernews.com> <43E719EE.3040401@gmail.com>
	<11ueq4nhn91qm91@corp.supernews.com> <43E8659D.6010101@gmail.com>
	<11uhcjj2p10mm0d@corp.supernews.com> <43E8D4DD.7040904@gmail.com>
	<11uhodjciifej02@corp.supernews.com>
Message-ID: <dscfcv$t5i$1@news.lysator.liu.se>


> sys.stdin.read() will return when ... the
> underyling read() call is aborted by a signal.

Not "return", really? Won't it just pass an exception? I thought that was what I was catching with the "except IOError" part there? I assumed that sys.stdin.read() would only return a value properly at EOF?

It looks to me as if sys.stderr.read() really gets an EOF at the final linebreak fed into the terminal prior to window size change, because the final unterminated line shows up on my shell prompt. Like so:

$ python winch.py
moo moo
cow cowmoo moo
$ cow cow

In this example I type moo moo[ENTER]cow cow on my keyboard and then resize the window.

Now that EOF has to come from somewhere (since there's no IOError or other exception, or the program wouldn't terminate nicely with nothing on stderr) and I'd like to point the blame at the terminal. Or is there something really fishy inside sys.stdin.read() or signal that puts EOFs into streams?

But anyway, as long as this behavior only shows up on interactive operation, the user will likely spot it anyway and can react to it. So I think this code would be pretty safe to use. What do you think?

> Resign the terminal will abort pending I/O operations on
> that terminal.  It won't terminal I/O operations pending on
> other devices/files.

What do you mean by "abort"? I can accept that "aborting" may lead to raising of IOError (which we can catch and retry), but not to arbitrary insertion of EOFs into streams (which we cannot distinguish from the real deal coming from the user).

Also: try your example and enter moo moo[ENTER]cow cow[RESIZE][ENTER][RESIZE]

Thanks again for your help.
/Joel

> 
> 
>>but it does return as soon as I enter more than one
>>line of text and then resize the window (one unterminated line
>>is ok). 
>>
>>Example text to type in:
>>moo moo
>>cow cow
>>
>>As soon as I have typed in something that includes a newline
>>charater through the keyboard and try to resize the terminal,
>>sys.stdin.read() will return whatever I put in no far and no
>>exception raised.
> 
> 
> Yup.  That does indeed appear to be the way it works. :)
> 
> 
>>Weird. Could it in fact my terminal that's screwing things up
>>for me?
> 
> 
> No.
> 
> Try this out:
> 
> ----------------------------------------------------------------------
> #!/usr/bin/python
> import signal, os, sys
> 
> _bTerminalSizeChanged = False
> 
> def report_terminal_size_change(signum, frame):
>     global _bTerminalSizeChanged
>     _bTerminalSizeChanged = True
> 
> signal.signal(signal.SIGWINCH, report_terminal_size_change)
> 
> while True:
>     try:
>         s = sys.stdin.read()
>         if not s:
>             break
>         sys.stdout.write(s)
>     except IOError:
>         sys.stderr.write("IOError\n")
>     if _bTerminalSizeChanged:
>         sys.stderr.write("SIGWINCH recevied\n")
>         _bTerminalSizeChanged = False
> ----------------------------------------------------------------------
> 
> In that example, I handle IOError on write with the same
> exception handler as the one for read.  That may not be exactly
> what you want to do, but it does demonstrate what
> window-resizing does.
> 
> When the window is resized, the SIGWINCH handler will be
> called.  A pending read() may abort with an IOError, or it may
> just return some buffered data.
> 


From xavier.morel at masklinn.net  Mon Feb 27 08:55:23 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Mon, 27 Feb 2006 14:55:23 +0100
Subject: How to do an 'inner join' with dictionaries
In-Reply-To: <1141047580.492771.97130@z34g2000cwc.googlegroups.com>
References: <1141047580.492771.97130@z34g2000cwc.googlegroups.com>
Message-ID: <dtv06v$mos$1@aphrodite.grec.isp.9tel.net>

cyborg4 at walla.co.il wrote:
> Let's say I have two dictionaries:
> dict1 is  1:23,  2:76,  4:56
> dict2 is  23:A, 76:B,  56:C
> 
> How do I get a dictionary that is
> 1:A, 2:B, 4:C
> 
 >>> dict1 = {1:23,2:76,4:56}
 >>> dict2 = {23:'A',76:'B',56:'C'}
 >>> dict((k, dict2[v]) for k, v in dict1.items())
{1: 'A', 2: 'B', 4: 'C'}
 >>>

?


From cvanarsdall at mvista.com  Fri Feb 17 16:23:41 2006
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Fri, 17 Feb 2006 13:23:41 -0800
Subject: Does python have an internal data structure with functions imported
	from a module?
Message-ID: <43F63EDD.5070705@mvista.com>

Alright, I attempted to post this question yesterday but I don't see it 
as showing up, so I apologize in advance if this is a double post.

Python Gurus:

Let me elaborate a bit more on this question.  Basically, I want to know 
if there is some data structure in python that maps a string function 
name to an address of a function or something to that nature.

If this is confusing, let me describe what I want to do and see if 
anyone has any ideas.

basically we have:

 >>>def functA():
...  pass

 >>> functA
<function functA at 80db128>

And what I'd like to do is:

 >>>__internalFuncDict__['functA']
<function functA at 80db128>

This is just for a little experimental project of mine, any help or 
pointers to the proper pages in the manual would be greatly 
appreciated.  Basically, I know that I can create something like this if 
I have to but I was very much hoping that something already existed 
somewhere that I could get to via python or by writing a C extension.

Thanks in advance!

-carl

-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From siona at chiark.greenend.org.uk  Wed Feb  8 08:56:42 2006
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 08 Feb 2006 13:56:42 +0000 (GMT)
Subject: apostrophe or double quote?
References: <1139370460.360400.232500@z14g2000cwz.googlegroups.com>
	<mailman.1589.1139373128.27775.python-list@python.org>
Message-ID: <oIE*M4N+q@news.chiark.greenend.org.uk>

Steve Holden  <steve at holdenweb.com> wrote:
>Huy wrote:
>> I've been unable to find information clarifying this but.  What is the
>> difference between 'somestring' and "somestring"?
>It's just easier to have two permitted string quotes. That way, if your 
>string has an apostrophe in it you can say
>
>     s = "it's"
>
>and if it has a double quote in it you can say
>
>     s = 'The double quote (") rules'
>
>So there's really no difference at all. You can also use escaping to 
>achieve the same end:
>
>     s = "The double quote (\") rules"
>
>if you prefer.

Or triple quoting:

    s = """The double quote (") rules"""


I've seen someone around here use 'somestring' for internal values
(dict keys and the like) and "somestring" for values being shown to
the user, so it's easy(ish) to tell what may need translating or
can otherwise safely be changed. I like this convention (provided
it remains a convention).

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From bj_666 at gmx.net  Fri Feb 17 18:24:59 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sat, 18 Feb 2006 00:24:59 +0100
Subject: How to run shell commands within python
References: <1140074469.258382.24620@f14g2000cwb.googlegroups.com>
	<mailman.1993.1140077329.27775.python-list@python.org>
	<donn-2F88D0.10053616022006@gnus01.u.washington.edu>
Message-ID: <pan.2006.02.17.23.24.59.910655@gmx.net>

In <donn-2F88D0.10053616022006 at gnus01.u.washington.edu>, Donn Cave wrote:

> You can replace "mv" with os.rename() if you don't
> care that it will fail when the destination is on a different
> filesystem.  Etc.

If you care than use `shutil.move()` instead.

Ciao,
	Marc 'BlackJack' Rintsch


From jeremy+complangpython at jeremysanders.net  Tue Feb 28 06:31:40 2006
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Tue, 28 Feb 2006 11:31:40 +0000
Subject: Printing a file
References: <du1bkn$56r$00$1@news.t-online.com>
Message-ID: <du1cat$p45$1@gemini.csx.cam.ac.uk>

Fabian Steiner wrote:

> Unfortunately I don't know how to realize this, since also some images
> and different boxes should be printed out. As the whole application is
> based on QT, QPrinter might be used, but I couldn't find any examples
> how to use it.

QPrinter is easy to use. You just draw to the page the same way as you talk
to the screen with a QPainter.

prnt = qt.QPrinter()
# you can also vary options like colour, doc name, dpi here

# display dialog box to user (you can actually leave this out)
if prnt.setup():
     painter = qt.QPainter()
     painter.begin(printer)
     # do stuff to draw to painter
     painter.end(printer)
     # do this between each page
     printer.newPage()

     # ... more pages can be printed to a painter

It's very easy to do. If you want to handle multiple pages and so on,
there's a bit of work to do to interface to the dialog to get the
user-selected page range, etc.

Jeremy

-- 
Jeremy Sanders
http://www.jeremysanders.net/


From deets at nospam.web.de  Tue Feb 21 04:44:16 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 21 Feb 2006 10:44:16 +0100
Subject: Writing my own typing monitor program for RSI sufferers...
In-Reply-To: <1140496915.106258.190830@z14g2000cwz.googlegroups.com>
References: <1140491147.433293.164700@g43g2000cwa.googlegroups.com>
	<mailman.2203.1140494506.27775.python-list@python.org>
	<1140496915.106258.190830@z14g2000cwz.googlegroups.com>
Message-ID: <4605ngF8ctkkU1@uni-berlin.de>

samslists at gmail.com schrieb:
> So, so close....  The problem with this implementation is that it
> doesn't monitor usb keyboards under linux at all as far as I can
> tell....since no keyboard entry will show up in /proc/interrupts with a
> usb keyboard.  I absolutely need the keyboard monitoring as well.
> 
> Otherwise, your project would be the perfect starting point for me!
> 
> Anyone else have an idea as to what I can use with Python to know when
> the keyboard is being used even when I don't have focus?

If you can wait a few month, I'll be doing that in python based on this:

http://www.frogmouth.net/hid-doco/linux-hid.html

I'll be doing it for a art-project that is scheduled some months away. But I think the above information even should 
help you get started on your own.

Diez


From dakman at gmail.com  Thu Feb  9 09:48:19 2006
From: dakman at gmail.com (dakman at gmail.com)
Date: 9 Feb 2006 06:48:19 -0800
Subject: CGI Python FTP
Message-ID: <1139496499.898773.230240@g44g2000cwa.googlegroups.com>

I know PHP has support for uploading files from the browser to the
server, but does python (not mod_py) have any modules for going about
this? If not post your ideas on how I should do this.

Thanks.



From steve at holdenweb.com  Sat Feb 18 13:28:47 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 18 Feb 2006 13:28:47 -0500
Subject: Another stupid newbie question
In-Reply-To: <pan.2006.02.18.00.49.32.389635@REMOVETHIScyber.com.au>
References: <1140203709.145048.314180@g43g2000cwa.googlegroups.com>	<mailman.2065.1140204717.27775.python-list@python.org>	<1140205868.660418.234980@z14g2000cwz.googlegroups.com>
	<pan.2006.02.18.00.49.32.389635@REMOVETHIScyber.com.au>
Message-ID: <dt7p0p$tl6$1@sea.gmane.org>

Steven D'Aprano wrote:
> On Fri, 17 Feb 2006 11:51:08 -0800, Byte wrote:
> 
> 
>>Great, thanks all. Now, how come
>>
>>        if x == mx: print x
>>                    break
>>
>>Dosnt work?
> 
> 
> Do yourself a HUGE favour and read this before posting any more questions
> to comp.lang.python. Trust me, you really will thank us.
> 
> http://www.catb.org/~esr/faqs/smart-questions.html
> 
> 
>  
If he doesn't lambast us I'll chalk it up as a win :-)

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From wbaxter at gmail.com  Thu Feb 16 22:35:23 2006
From: wbaxter at gmail.com (Bill Baxter)
Date: Fri, 17 Feb 2006 12:35:23 +0900
Subject: [Numpy-discussion] Re: calculating on matrix indices
In-Reply-To: <43F5388A.7010905@bryant.edu>
References: <mailman.2027.1140133353.27775.python-list@python.org>
	<aI8Jf.42165$T35.666013@news20.bellglobal.com>
	<43F5388A.7010905@bryant.edu>
Message-ID: <e86a5fd00602161935j2932eb06jb4a64c9f79c151d8@mail.gmail.com>

Howdy,

On 2/17/06, Brian Blais <bblais at bryant.edu> wrote:
>
> Colin J. Williams wrote:
> > Brian Blais wrote:
> >> In my attempt to learn python, migrating from matlab, I have the
> >> following problem. Here is what I want to do, (with the wrong syntax):
> >>
> >> from numpy import *
> >>
> >> t=arange(0,20,.1)
> >> x=zeros(len(t),'f')


This was the line causing the type error.  t is type double (float64).  'f'
makes x be type float32.  That causes the assignment below to fail.
Replacing that line with

     x=zeros(len(t),'d')

should work.  Or the zeros_like() that Travis suggested.


>>
> >> idx=(t>5)                # <---this produces a Boolean array, probably
> not what you want.
> >> tau=5
> >> x[idx]=exp(-t[idx]/tau)  # <---this line is wrong (gives a TypeError)
> >>



You could also use
   idx=where(t>5)
In place of
   idx=(t>5)

Although in this case it probably doesn't make much difference, where(expr)
is more directly equivalent to matlab's find(expr).

See http://www.scipy.org/Wiki/NumPy_for_Matlab_Users for more Matlab
equivalents.  And consider contributing your own, if you have some good ones
that aren't there already.

--bb
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From limodou at gmail.com  Tue Feb  7 21:51:46 2006
From: limodou at gmail.com (limodou)
Date: Wed, 8 Feb 2006 10:51:46 +0800
Subject: module with __call__ defined is not callable?
In-Reply-To: <6ab99bf50602071838m2abd3871q@mail.gmail.com>
References: <6ab99bf50602071838m2abd3871q@mail.gmail.com>
Message-ID: <505f13c0602071851w7b2f6d62yafd703223d1b16b5@mail.gmail.com>

On 2/8/06, adam johnson <adam.sven.johnson at gmail.com> wrote:
> Hi All.
> I was wondering why defining a __call__ attribute for a module doesn't make
> it actually callable.
>
> I don't have any reason for doing so, I was just wondering if it worked, and
> found out it didn't.
>
> $ cat mod.py
> """
> Test callable module
> """
> def __call__():
>     return "in mod.__call__"
>
>
> >>> import mod
> >>> mod()
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> TypeError: 'module' object is not callable
> >>> mod.__call__()
> 'in mod.__call__'
>
>
> Thanks for any replies, Adam.
>
>

I remebered that __call__() is just used for class, but not module. Am I wrong?

--
I like python!
My Blog: http://www.donews.net/limodou
NewEdit Maillist: http://groups.google.com/group/NewEdit


From caseyhHAMMER_TIME at istar.ca  Wed Feb 22 17:52:00 2006
From: caseyhHAMMER_TIME at istar.ca (Casey Hawthorne)
Date: Wed, 22 Feb 2006 22:52:00 GMT
Subject: May i customize basic operator (such as 1==3)?
References: <mailman.2279.1140579610.27775.python-list@python.org>
	<l7onv1t5rpivgrutuhqpahu56ah113b7su@4ax.com>
	<mailman.2281.1140582215.27775.python-list@python.org>
Message-ID: <j2qpv112csno0a243t48aaebcnrnmfb4e1@4ax.com>

Cannot one subclass the builtin types?

I have heard, that one should always use objects when programming and
avoid the builtin types!

Then one is prepared to change objects at will and not rely on any
special properties of the builtin types!


Robert Kern <robert.kern at gmail.com> wrote:

>Casey Hawthorne wrote:
>> I believe you are asking for a side effect from the "==" operator.
>> 
>> Add print statements to the __eq__ method.
>
>The things is, he wants to make those modifications to builtin types, which he
>can't do.
--
Regards,
Casey


From stefan.rank at ofai.at  Tue Feb 28 08:33:41 2006
From: stefan.rank at ofai.at (Stefan Rank)
Date: Tue, 28 Feb 2006 14:33:41 +0100
Subject: PEP 354: Enumerations in Python
In-Reply-To: <1141125265.118619.36500@i40g2000cwc.googlegroups.com>
References: <87accdplbj.fsf@rose.polar.local>	<1141109451.570616.86140@p10g2000cwp.googlegroups.com>	<mailman.2505.1141118380.27775.python-list@python.org>
	<1141125265.118619.36500@i40g2000cwc.googlegroups.com>
Message-ID: <44045135.4080007@ofai.at>

on 28.02.2006 12:14 Carl Banks said the following:
[snip]
> 
>>> It's a pretty weak case to have a dedicated builtin to prevent
>>> duplicates in something that changes maybe once a month, as enums tend
>>> to change rather slowly.  (At least, that's the way enums in other
>>> languages are used, and the design you present here seems to suggest
>>> you intend to use them that way as well.)  And frankly, a unit test or
>>> assertion could check this.
>> [snip]
>>
>> I don't understand what you mean by 'change rather slowly'?
> 
> Construct data structure on-the-fly from an XML file edited by multiple
> people every day  = changes rather quickly
> 
> Construct data structure from a Python file that was last edited a year
> and a half ago = changes rather slowly
> 
> Typically, enums fall into the latter category.  You set the enum
> values, and then pretty much leave them alone, adding new values only
> occasionally.  (Come on, how often do the days of the week change?)
> All I was saying is, changes to the enum values are infrequent enough
> that having a special type just to make sure there are no duplicates is
> a waste.  The only justification for a built-in enum is the other stuff
> you mentioned.

agreed

>> One thing that is probably missing to allow this, is a enum-set-creation
>> with the | operator::
>>
>>    Weekdays = enum('mon', 'tue', 'wed', 'thu', 'fri', 'sat', 'sun')
>>    daysihate = Weekdays.mon | Weekdays.thu
>>
>> (and this discussion needs to move to python-dev ?)
> 
> What's wrong with set((Weekdays.mon,Weekdays.thu))?  Explicit is better
> than implicit.

agreed again.
the | idea would only be for (interface) backwards compatibility.

>> As for the metaclass versions: For myself, the above version feels more
>> natural and straightforward (in the same way as the PEP author describes
>> it), though I understand the subclassing ideas.
>>
>> But are there use cases for subclassing, that aren't better served with
>> a new enum or something homegrown?
>> Can C++/Pascal/Java enums be subclassed?
> 
> In C++, enum is a type but not a class.  Same thing with Ada.  Java
> didn't have enums last time I checked.  Don't know about Pascal.

Was more of a question for subclassing use cases in other languages.
BTW Java has an enum now, which cannot be subclassed either AFAIK. And 
it's the same for (Delphi) Pascal.

> I
> didn't care too much about subclassing; I just thought different enum
> constant that couldn't (or, rather, oughtn't) be compared probably
> should be instances of a separate class.  It doesn't matter much,
> though.
> Should something like this work:
> 
> day = Weekdays.mon
> isinstance(day,Weekdays)
> 
> ?

I think in the PyPI package `type(Weekdays)` is `Enum` and 
`type(Weekdays.mon)` is `EnumValue`, so this would not work.
But membership testing `if day in Weekdays: ...` could do the same, and 
type-checking for enum values `isinstance(day, EnumValue)` would work 
(might be unpythonic though).

In the cookbook recipe `enum('..')` is a function and constructs two new 
types on the fly, so the values of two different enums would be of a 
different type, but you would not be able to name it easily...

cheers



From drevil_53711 at yahoo.com  Mon Feb 13 14:46:31 2006
From: drevil_53711 at yahoo.com (Steve Young)
Date: Mon, 13 Feb 2006 11:46:31 -0800 (PST)
Subject: html source
Message-ID: <20060213194631.10759.qmail@web36512.mail.mud.yahoo.com>

Hi, I was wondering why when I use urllib2.build_opener().open(url), it  doesn't give me the same thing as if I would just click on view-->  source on my web browser. It gives me most of html on the page but  leaves out lots of scripts and some of the link's urls are truncated.  Is there something out there in python that gives me EXACTALLY the same  thing as if you were to just do view-->source on the web browser?  Thanks for the help.
  
  -Steve 
  
		
---------------------------------
 
 What are the most popular cars? Find out at Yahoo! Autos 
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From michele.simionato at gmail.com  Thu Feb 23 03:32:56 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 23 Feb 2006 00:32:56 -0800
Subject: streaming Popen.stdout
In-Reply-To: <1140536945.936115.59570@z14g2000cwz.googlegroups.com>
References: <1140536945.936115.59570@z14g2000cwz.googlegroups.com>
Message-ID: <1140683576.371465.210650@z14g2000cwz.googlegroups.com>

Replying to myself ...

I cooked up this solution involving os.pipe and os.fork, but I am not
especially happy with
it; anyway, let me write it. Feedback is welcome, since this was
written very quickly and
I may have missed something. BTW, are there libraries out there doing
something similar?

----

import subprocess
import os, sys, time

class ReadObject(object):
    def __init__(self, fileno):
        self.fileno = fileno
        self._closed = False
        self.name = str(self)
    def readline(self):
        if self._closed : return ''
        return ''.join(iter(self.read1, '\n')) + '\n'
    def read(self):
        return ''.join(iter(self.read1, '\x00'))
    def read1(self):
        c = os.read(self.fileno, 1)
        if c == '\x00':
            self._closed = True
            return '\n'
        else:
            return c
    def __iter__(self):
        return iter(self.readline, '')

class WriteObject(object):
    def __init__(self, fileno):
        self.fileno = fileno
        self.name = str(self)
    def write(self, text):
        os.write(self.fileno, text)
    def flush(self):
        pass
    def close(self):
        self.write('\x00')

def callproc(child, *args,**kw):
    "Run the child procedure in a child process"
    r, w = os.pipe()
    R, W = ReadObject(r), WriteObject(w)
    if os.fork(): # parent
        return R
    else: # child
        sys.stdout = W
        try:
            child(*args, **kw)
        finally:
            W.close()
        sys.exit()

if __name__ == '__main__':
    for line in callproc(subprocess.call, [sys.executable,
'hello.py']):
        print line,



From invalidemail at aerojockey.com  Tue Feb 28 01:50:51 2006
From: invalidemail at aerojockey.com (Carl Banks)
Date: 27 Feb 2006 22:50:51 -0800
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
Message-ID: <1141109451.570616.86140@p10g2000cwp.googlegroups.com>

Ben Finney wrote:
> This PEP specifies an enumeration data type for Python.

-1 for this particular proposal as a builtin.  I feel it's not a great
design of something that isn't terribly useful to begin with.  +0 for
the standard library, only after a couple changes.  As I see it, this
whole proposal is a minor improvement over doing something like the
following, but too minor an improvement to add to the builtin
namespace:

MON = 'mon'
TUE = 'tue'
etc.

DAYS_OF_WEEK  = (MON,TUE,etc.)


[snip]
> It is possible to simply define a sequence of values of some other
> basic type, such as ``int`` or ``str``, to represent discrete
> arbitrary values.  However, an enumeration ensures that such values
> are distinct from any others, and that operations without meaning
> ("Wednesday times two") are not defined for these values.

Here's why I think it's not too useful to begin with: the benefits of
the enum you describe here are pretty weak.

It's a pretty weak case to have a dedicated builtin to prevent
duplicates in something that changes maybe once a month, as enums tend
to change rather slowly.  (At least, that's the way enums in other
languages are used, and the design you present here seems to suggest
you intend to use them that way as well.)  And frankly, a unit test or
assertion could check this.

As for preventing nonsensical operations on enum constants: good idea,
but let's face it: a decent programmer knows whether he or she's
dealing with a enum value or a piece of string data.  This is why I
said it's not terribly useful (as opposed to not useful at all).
Unfortunately, this proposal fails to prevent a nonsensical operation
in the case where it would be most useful to do so.


[snip]
> Enumerations with no values are meaningless.  The exception
> ``EnumEmptyError`` is raised if the constructor is called with no
> value arguments.

No strong feeling on this issue.  Probably no use for an empty enum,
but no harm either.


[snip]
> This allows the operation to succeed, evaluating to a boolean value::
>
>     >>> gym_night = Weekdays.wed
>     >>> gym_night < Weekdays.mon
>     False
>     >>> gym_night < Weekdays.wed
>     False
>     >>> gym_night < Weekdays.fri
>     True
>     >>> gym_night < 23
>     False
>     >>> gym_night > 23
>     True
>     >>> gym_night > "wed"
>     True
>     >>> gym_night > Grades.B
>     True

The nonsensical comparisions should throw value errors.  You say that
you want to get rid of operations that don't make sense, but it seems
misguided that we would get rid of multiplying by a integer (something
that's not likely to happen much at all) but retain comparison with
other types (something that's going to be much more common).

I realize that this is a thoughtful decision on your part, that you
have some reason for it and were not just blindly following the example
of other Python builtins.  However, IMHO, this design decision forsakes
the single most useful feature of an enum, and replaces it with
confusion.


[snip examples of use]

One thing I'd add is something like Weekdays.get_constant("wed").  I
realize that you can do this with getattr, but you can also do
getattr(Weekdays,"__dict__") with getattr, and you ought to have a
method that thows and exception if you try to access the __dict__
constant.

Also, it blesses the operation, so that people who are trying to access
the constant after reading its name from the database don't have to
feel guilty about using getattr.


[snip]
> Metaclass for creating enumeration classes
> ------------------------------------------
>
> The enumerations specified in this PEP are instances of an ``enum``
> type.  Some alternative designs implement each enumeration as its own
> class, and a metaclass to define common properties of all
> enumerations.
>
> One motivation for having a class (rather than an instance) for each
> enumeration is to allow subclasses of enumerations, extending and
> altering an existing enumeration.  A class, though, implies that
> instances of that class will be created;

How so?  This is true of classes with metaclass type, but using a
different metaclass suggests maybe it isn't like a regular class.  In
particular, constructing an instance could be a non-op; instead the
class creates it's own instances at definition time.  I don't see
anything that implies that a class can't do that.

> it is difficult to imagine
> what it means to have separate instances of a "days of the week"
> class, where each instance contains all days.

I don't understand what you're saying here.  It doesn't seem to me hard
to imagine that a class could create its own instances, but I'm not
sure if that's what you're talking about.

> This usually leads to
> having each class follow the Singleton pattern, further complicating
> the design.

Meh.  I don't feel too strongly about this, but I'd think an enum as a
class is better, because you can't (or, rather, oughtn't) compare
constants from different enums.  That's a logical demarcation of
classes.

Sorry if I was a little blunt here.  In the end, I really don't see the
problems that this enum addresses being all that common; it seems a lot
of work for minor benefit.


Carl Banks



From hipertracker at gmail.com  Fri Feb 10 09:31:19 2006
From: hipertracker at gmail.com (Jaroslaw Zabiello)
Date: Fri, 10 Feb 2006 14:31:19 +0000
Subject: What editor shall I use?
References: <1139410110.389122.215400@z14g2000cwz.googlegroups.com>
Message-ID: <t3o3qm3mo0dh$.1ofs0w9c9no1d$.dlg@40tude.net>

On 8 Feb 2006 06:48:30 -0800, Lad wrote:

> What editor shall I use if my Python script must contain utf-8
> characters?
> I use XP

The best (and free) are:

Eclipse http://www.eclipse.org/ 
with pydev http://pydev.sourceforge.net/

SPE http://pythonide.stani.be/

Eric3 http://www.die-offenbachs.de/detlev/eric3.html
win32 binary: http://www.quadgames.com/download/pythonqt/

All of them contain cool debugger and a lot of usefull options.

If you want only plain text editor, you can use SciTe, vim, Notepad++ or
whatever.

--
Jaros?aw Zabie??o
http://blog.zabiello.com


From bblais at bryant.edu  Sat Feb 18 07:52:27 2006
From: bblais at bryant.edu (Brian Blais)
Date: Sat, 18 Feb 2006 07:52:27 -0500
Subject: strange error I can't figure out...
Message-ID: <43F7188B.6040809@bryant.edu>

Hello,

I have an odd kind of Heisenbug in what looks like a pretty simple program.  The 
program is a progress bar code I got at the Python Cookbook:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/168639

(including the code below)


If you uncomment the one print statement I added in the progressBar class, you get 
the error:

   File "test_progress2.py", line 19
     diffFromMin = float(self.amount - self.min)
     ^
SyntaxError: invalid syntax


yet, without the print statement, it works fine.  what am I overlooking here?


			thanks,


					bb

#------------------------------------------------------------------------

class progressBar:
	def __init__(self, minValue = 0, maxValue = 10, totalWidth=12):
		self.progBar = "[]"   # This holds the progress bar string
		self.min = minValue
		self.max = maxValue
		self.span = maxValue - minValue
		self.width = totalWidth
		self.amount = 0       # When amount == max, we are 100% done
		self.updateAmount(0)  # Build progress bar string

	def updateAmount(self, newAmount = 0):
		if newAmount < self.min: newAmount = self.min
		if newAmount > self.max: newAmount = self.max
		self.amount = newAmount

#        print "hello"   #<--------------  uncomment line to break

		# Figure out the new percent done, round to an integer
		diffFromMin = float(self.amount - self.min)
		percentDone = (diffFromMin / float(self.span)) * 100.0
		percentDone = round(percentDone)
		percentDone = int(percentDone)

		# Figure out how many hash bars the percentage should be
		allFull = self.width - 2
		numHashes = (percentDone / 100.0) * allFull
		numHashes = int(round(numHashes))

		# build a progress bar with hashes and spaces
		self.progBar = "[" + '#'*numHashes + ' '*(allFull-numHashes) + "]"

		# figure out where to put the percentage, roughly centered
		percentPlace = (len(self.progBar) / 2) - len(str(percentDone))
		percentString = str(percentDone) + "%"

		# slice the percentage into the bar
		self.progBar = self.progBar[0:percentPlace] + percentString + 
self.progBar[percentPlace+len(percentString):]

	def __str__(self):
		return str(self.progBar)


if __name__ == "__main__":

     import time
     prog = progressBar(0, 100, 77)
     for i in xrange(101):
         prog.updateAmount(i)
         print prog, "\r",
         time.sleep(.05)




From hinnc at yahoo.com  Tue Feb  7 12:09:38 2006
From: hinnc at yahoo.com (slogging_away)
Date: 7 Feb 2006 09:09:38 -0800
Subject: Too Many if Statements?
In-Reply-To: <43e8d21b$0$32168$626a54ce@news.free.fr>
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<43e8d21b$0$32168$626a54ce@news.free.fr>
Message-ID: <1139332178.557744.73030@g47g2000cwa.googlegroups.com>

I don't consider myself to be a seasoned programmer so if you mean
redesigning the script to make the checks and therefore reduce the
number of 'if' statements, I'm not sure if that can be done.  The
script needs to make numerous checks for the existence of particular
strings within the configuration file.  It also uses 'if' statements to
determine what type of file is being examined, etc.. If an error is
encounterd it writes warning messages to a master file.  I guess what I
am trying to say is that in order to make the many checks on the
configuration files I do not know of any other way than to check for
the existance of particular statements, (strings), and then report on
those if they are incorrect or missing - hence at least one 'if'
statement for every check. 

I appreciate the feedback though!



From steve at REMOVETHIScyber.com.au  Thu Feb 23 10:38:12 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 24 Feb 2006 02:38:12 +1100
Subject: Unexpected timing results
Message-ID: <pan.2006.02.23.15.38.11.944281@REMOVETHIScyber.com.au>

I have two code snippets to time a function object being executed. I
expected that they should give roughly the same result, but one is more
than an order of magnitude slower than the other.

Here are the snippets:

def timer1():
    timer = time.time
    func = lambda : None
    itr = [None] * 1000000
    t0 = timer()
    for _ in itr:
        func()
    t1 = timer()
    return t1 - t0

def timer2():
    timer = time.time
    func = lambda : None
    itr = [None] * 1000000
    t = 0.0
    for _ in itr:
        t0 = timer()
        func()
        t1 = timer()
        t += t1 - t0
    return t

Here are the results:

>>> timer1()
0.54168200492858887
>>> timer2()
6.1631934642791748

Of course I expect timer2 should take longer to execute in total,
because it is doing a lot more work. But it seems to me that all that
extra work should not affect the time measured, which (I imagine) should
be about the same as timer1. Possibly even less as it isn't timing the
setup of the for loop.

Any ideas what is causing the difference? I'm running Python 2.3 under
Linux.

Thanks,



-- 
Steven.



From michaeltaft at gmail.com  Tue Feb  7 17:31:38 2006
From: michaeltaft at gmail.com (mwt)
Date: 7 Feb 2006 14:31:38 -0800
Subject: 450 Pound Library Program
Message-ID: <1139351498.090768.82270@o13g2000cwo.googlegroups.com>

So in a further attempt to learn some Python, I've taken the little
Library program
(http://groups.google.com/group/comp.lang.python/browse_thread/thread/f6a9ccf1bc136f84)
I wrote and added several features to it. Readers now quit when they've
read all the books in the Library. Books know how many times they've
been read. Best of all, you can now create your own list of books to
read!

Again, the point of all this is to get used to programming in Python.
So although the program is trivial, any feedback on style, structure,
etc. would be much appreciated. I'm a convert from Java, so I've
probably got some unconscious Javanese in there somewhere. Help me get
rid of it!

Here's the new, improved program:
[code]
#!/usr/bin/python
# Filename: Library.py
# author: mwt
# Feb, 2006

import thread
import time
import threading
import random



class Library2:
    def __init__(self, listOfBooks, totalBooks):
        self.stacks = listOfBooks
        self.cv = threading.Condition()
        self.totalBooks = totalBooks

    def checkOutBook(self, readerName):
        "'Remove book from the front of the list, block if no books are
available'"
        self.cv.acquire()
        while len(self.stacks) == 0:
            self.cv.wait()
            print "%s waiting for a book..." %readerName
        book = self.stacks.pop(0)
        self.cv.release()
        return book

    def returnBook(self, returnedBook):
        "'put book at the end of the list, notify that a book is
available'"
        returnedBook.wasRead()
        self.cv.acquire()
        self.stacks.append(returnedBook)
        self.cv.notify()
        self.cv.release()

class Reader(threading.Thread):

    def __init__(self, library, name, readingSpeed, timeBetweenBooks):
        threading.Thread.__init__(self)
        self.library = library
        self.name = name
        self.readingSpeed = readingSpeed
        self.timeBetweenBooks = timeBetweenBooks
        self.book = ""
        self.numberOfBooksRead = 0

    def run(self):
        "'Keep checking out and reading books until you've read all in
the Library'"
        while  self.numberOfBooksRead < self.library.totalBooks:
            self.book = self.library.checkOutBook(self.name)
            print "%s reading %s" %(self.name, self.book.title),
            time.sleep(self.readingSpeed)
            self.numberOfBooksRead += 1
            self.library.returnBook(self.book)
            print "%s done reading %s" %(self.name, self.book.title),
            print"Number of books %s has read: %d" %(self.name,
self.numberOfBooksRead)
            self.bookName = ""
            time.sleep(self.timeBetweenBooks)
        print "%s done reading." %self.name

class Book:
    def __init__(self, author, title):
        self.author = author
        self.title = title
        self.numberOfTimesRead = 0
        #print "%s,%s" % (self.author, self.title),#print as books are
loaded in

    def wasRead(self):
        self.numberOfTimesRead += 1
        print "Number of times %s has been read: %d" %(self.title,
self.numberOfTimesRead)

if __name__=="__main__":

    print "\nWELCOME TO THE THURMOND STREET PUBLIC LIBRARY"
    print "Checking which books are avialable...\n"
    try:
        theBookFile = open("books.txt", "r")#Create your own list of
books!
        stacks = []#a place to put the books
        for line in theBookFile.readlines():
            L = line.split (",")  # a comma-delimited list
            author = L[0]
            bookName =  L[1]
            newBook = Book(author, bookName)
            stacks.append(newBook)
        theBookFile.close()
    except IOError:
        print "File not found!"
    #string = "How many books would you like in the Library?[1-" +
str(len(stacks)) + "]"
    totalBooks = input("How many books would you like in the
Library?[1-" + str(len(stacks)) + "]")
    stacks[totalBooks: len(stacks)] = []
    print "Number of books in the Library is:", len(stacks)
    library = Library2(stacks, totalBooks)
    readers = input("\nHow many readers would you like?")
    print "Number of readers is:", readers, "\n"
    for i in range(0,readers):
       newReader = Reader(library, "Reader" + str (i),
random.randint(1,7), random.randint(1,7))
       newReader.start()
[/code]

And here's a handy text file of books for you, so you don't have to
make your own:
[code]
Conrad, Heart of Darkness
Kafka, Die Verwandlung
Hemingway, For Whom the Bell Tolls
James Joyce, Dubliners
Moliere, Cyrano de Bergerac
William Golding, Lord of the Flies
Dostoevski, Crime and Punishment
Cervantes, Don Quixote
Camus, L'Etranger
Tolstoy, War and Peace
Poe, Tales
Faulkner, The Sound and the Fury
Orwell, 1984
Fitzgerald, The Great Gatsby
Steinbeck, The Grapes of Wrath
Huxley, Brave New World
Twain, The Adventures of Huckleberry Finn
Mann, Der Tod in Venedig
Kesey, Sometimes a Great Notion
Pynchon, Gravity's Rainbow
McEwan, The Cement Garden
M?rquez, Cien A?os de Soledad
Salinger, The Catcher in the Rye
Miltion, Paradise Lost
Chapman et al , The Pythons
[/code]



From johnmc at velseis.com.au  Tue Feb 21 19:33:11 2006
From: johnmc at velseis.com.au (John McMonagle)
Date: Wed, 22 Feb 2006 10:33:11 +1000
Subject: Basic coin flipper program - logical error help
In-Reply-To: <1140567243.251982.255620@g14g2000cwa.googlegroups.com>
References: <1140567243.251982.255620@g14g2000cwa.googlegroups.com>
Message-ID: <1140568392.31572.5.camel@cornell>

On Tue, 2006-02-21 at 16:14 -0800, DannyB wrote:
> I'm just learning Python.  I've created a simple coin flipper program -
> here is the code:
> 
> [source]
> #Coin flipper
> import random
> 
> heads = 0
> tails = 0
> counter = 0
> 
> coin = random.randrange(2)
> 
> while (counter < 100):
>     if (coin == 0):
>         heads += 1
>         counter += 1
>     else:
>         tails += 1
>         counter += 1
> 
> coin = random.randrange(2)
> 
> 
> print "\nThe coin landed on heads", heads, "times."
> print "\nThe coin landed on tails", tails, "times."
> [/source]
> 
> <<<I'm sure the [source] tags don't work - I through them in there
> anyway.>>>
> 
> The program runs - however - it will give me 100 heads OR 100 tails.
> Can someone spot the logic error?  

Yes.  Put coin = random.randrange(2) inside the while loop.

import random

heads = 0
tails = 0
counter = 0

coin = random.randrange(2)

while (counter < 100):
    if (coin == 0):
        heads += 1
        counter += 1
    else:
        tails += 1
        counter += 1

    coin = random.randrange(2)

print "\nThe coin landed on heads", heads, "times."
print "\nThe coin landed on tails", tails, "times."


-- 
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.



From anothermoi at sbcglobal.net  Fri Feb 17 10:28:29 2006
From: anothermoi at sbcglobal.net (Lou G)
Date: 17 Feb 2006 07:28:29 -0800
Subject: Checkbuttons in a Text widget
Message-ID: <1140190108.192983.287630@g14g2000cwa.googlegroups.com>

I'm trying to show a number of Checkbuttons (each with associated text
based on a list of names) inside a y-scrollable Text widget like so:

[ ] Bob
[ ] Carol
[ ] Ted
[ ] Alice
etc.
etc.

There may be quite a few (as many as 100 or so). I'm uncertain as to
the correct way to get these into the Text widget. I've tried
text.insert and it doesn't seem to do the job. Help?

Thanks,
Lou G



From mh at pixar.com  Tue Feb  7 14:35:48 2006
From: mh at pixar.com (Mark Harrison)
Date: Tue, 07 Feb 2006 19:35:48 GMT
Subject: creat a DOM from an html document
References: <hr6Gf.1933$rL5.1215@newssvr27.news.prodigy.net>
Message-ID: <oE6Gf.1938$rL5.241@newssvr27.news.prodigy.net>

Mark Harrison <mh at pixar.com> wrote:
> Now I can't seem to find this... does anybody have a recommendation
> as to a good package to look at?

Ahh, it's BeautifulSoup...

Thanks All!!


From gregpinero at gmail.com  Tue Feb 14 11:16:06 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Tue, 14 Feb 2006 11:16:06 -0500
Subject: Python 3000 deat !? Is true division ever coming ?
In-Reply-To: <1139928242.726349.221080@g44g2000cwa.googlegroups.com>
References: <1139810036.943598.229030@g47g2000cwa.googlegroups.com>
	<1139928242.726349.221080@g44g2000cwa.googlegroups.com>
Message-ID: <312cfe2b0602140816y17326dcbg7f6db0414b8d462a@mail.gmail.com>

On 14 Feb 2006 06:44:02 -0800, rainbow.cougar at gmail.com

> 5./2.=2.5 is floating point math, with all the round off errors that
> incorporates.

Thanks Curtis, I never knew that trick.  I guess for variables do have
true division you have to make them floats?  e.g.
float(var1)/float(var2)?  Or do you know a less typing approach for
that?

--
Gregory Pi?ero
Chief Innovation Officer
Blended Technologies
(www.blendedtechnologies.com)


From tjreedy at udel.edu  Mon Feb  6 20:04:31 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 6 Feb 2006 20:04:31 -0500
Subject: Using bytecode, not code objects
References: <mailman.1183.1138496140.27775.python-list@python.org><1138514565.112950.212310@o13g2000cwo.googlegroups.com><d3d66b1c0601291236l691aae57j@mail.gmail.com><mailman.1524.1139262941.27775.python-list@python.org>
	<1139263624.553961.236730@g14g2000cwa.googlegroups.com>
Message-ID: <ds8rmu$2hp$1@sea.gmane.org>


"Raymond Hettinger" <python at rcn.com> wrote in message 
news:1139263624.553961.236730 at g14g2000cwa.googlegroups.com...
>
> Fabiano Sidler wrote:
>> with pdb (which I'm surely not using as neatly as it could be). Or is
>> there any documentation on it I couldn't find?
>
> The pysassem module is part of the compiler package:
>
>   http://docs.python.org/lib/compiler.html

The 2.4 docs, which the above links to, only has sections on modules 
compiler, compiler.ast, and compiler.visitor and not on .consts, .future, 
.misc, .pyassem, .pycodegen, .symbols, and .transformer.  However,

import compiler
help(compiler.ast)

gives a few pages of info derived from the module.

Terry Jan Reedy





From rtilley at vt.edu  Sat Feb 11 11:08:13 2006
From: rtilley at vt.edu (rtilley)
Date: Sat, 11 Feb 2006 16:08:13 +0000
Subject: Is python very slow compared to C
In-Reply-To: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
Message-ID: <dsljmo$im0$1@solaris.cc.vt.edu>

diffuser78 at gmail.com wrote:
> I have just started to learn python. Some said that its slow. Can
> somebody pin point the issue.

It depends on what you are doing. Much of Python is just wrapped C. So 
many things are very fast.


From fredrik at pythonware.com  Thu Feb  2 02:24:01 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 2 Feb 2006 08:24:01 +0100
Subject: OO conventions
References: <5f56302b0602011440o47c07c4h3e2b0e4a1338e4fa@mail.gmail.com>
	<20060201190903.738b97e4@samwise.anansi>
Message-ID: <drsc2i$8d8$1@sea.gmane.org>

Terry Hancock wrote:

> What Lundh is modeling this on is not standard OOP thinking,
> but rather the standard way of opening files in Python.
>
> Or you could say he's using a "factory function".

"open" is a factory function, and it picks the right class based
on the file you're opening.

anyone arguing that this is bad OOP is deluded.

</F>





From bonono at gmail.com  Mon Feb 13 01:45:22 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 12 Feb 2006 22:45:22 -0800
Subject: Is python very slow compared to C
In-Reply-To: <mailman.1814.1139812851.27775.python-list@python.org>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
	<1139754010.067582.214830@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>
	<mailman.1785.1139762698.27775.python-list@python.org>
	<pan.2006.02.12.17.18.50.356928@REMOVETHIScyber.com.au>
	<1139793721.739325.235780@z14g2000cwz.googlegroups.com>
	<43F01749.2000601@REMOVEMEcyber.com.au>
	<1139809484.447810.17000@g44g2000cwa.googlegroups.com>
	<mailman.1814.1139812851.27775.python-list@python.org>
Message-ID: <1139813121.956510.182710@z14g2000cwz.googlegroups.com>


PA wrote:
> On Feb 13, 2006, at 06:44, bonono at gmail.com wrote:
>
> > And if we use market penetration as measure, Perl seems to be easier
> > for people ?
>
> Perl: Shell scripts/awk/sed are not enough like programming languages.
>
> Python: Perl is a kludge.
>
> "What Languages Fix"
> http://www.paulgraham.com/fix.html
>
> Cheers

Where is the entry for Lua and Haskell, both I found very interesting.



From steve at holdenweb.com  Tue Feb 14 16:26:19 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 14 Feb 2006 16:26:19 -0500
Subject: How can I find a freelance programmer?
In-Reply-To: <43F241B6.9090303@pollenation.net>
References: <op.s4y9v9olix6gqv@charles> <43F241B6.9090303@pollenation.net>
Message-ID: <43F24AFB.4010800@holdenweb.com>

Tim Parkin wrote:
> Charles wrote:
> 
> 
>>Hello,
>>
>>I am looking for a freelance Python programmer to create a cross-platform  
>>application with wxPython.
>>Any idea where I could find one?
>>Thanks,
>>
>> 
>>
> 
> You could ask Steve Holden?  -  that'll be 10% commission Steve! ;-)
> 
Hi, Charles

How can I help you? I'm fairly experienced with Python, and I'm giving a 
wxPython tutorial at PyCon in a week's time, so I know the technologies 
you need. What's the requirement?

[Thanks, Tim: can I pay you in beer? :-)]

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/


From zaatar05 at walla.com  Wed Feb 22 15:50:28 2006
From: zaatar05 at walla.com (zaatar05 at walla.com)
Date: 22 Feb 2006 12:50:28 -0800
Subject: com inheritance
Message-ID: <1140641428.251998.305020@o13g2000cwo.googlegroups.com>

Hi

I have a python class, which i want to wrap in a COM class

Can the COM class inherit all the methods and attributes and thus be
used by a COM client?
example:


class A:
    __init__(self, Param):
       self.Param = Param

class COMA(A):
   _public_attributes_ = ["Param"]
   def __init__(self, Param):
       A.__init__(self, Param)

thanks in advance



From renato.ramonda at gmail.com  Mon Feb 27 02:45:26 2006
From: renato.ramonda at gmail.com (Renato)
Date: 26 Feb 2006 23:45:26 -0800
Subject: Python Indentation Problems
In-Reply-To: <1141021286.047172.278030@z34g2000cwc.googlegroups.com>
References: <1141021286.047172.278030@z34g2000cwc.googlegroups.com>
Message-ID: <1141026326.424249.187030@p10g2000cwp.googlegroups.com>

If you use vi (vim, I hope), then place something like this in your
.vimrc

set ts=4
set sw=4
set expandtab
set ai

There are a lot more tricks for python in vim (and plugins, and
helpers, and so on), but this is the starting point: tabstops of 4
places, autoconverted in spaces. Also, when shifting text with < or >
it moves 4 spaces.

-- 
bye, 
Renato



From ram0812 at hotmail.com  Thu Feb  9 09:19:27 2006
From: ram0812 at hotmail.com (Raja Raman Sundararajan)
Date: 9 Feb 2006 06:19:27 -0800
Subject: Test indexers...how do they work?
Message-ID: <1139494767.338556.110030@g44g2000cwa.googlegroups.com>

Hello guys,
    I was investigating how one can use the "text indexers" in python
and I stumbled across several ones. eg., pylucene

I wanted to know how the algorithm of indexers look like. I have heard
people talking about B-Trees. But this info. is simply know enough. I
would like to know exactly each part of the indexing flow and the
algorightm behind it work.

Can someone here point me to the right material?

Thanks!



From heikki at osafoundation.org  Fri Feb 17 18:20:52 2006
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Fri, 17 Feb 2006 15:20:52 -0800
Subject: RSA in python
In-Reply-To: <mailman.2057.1140187795.27775.python-list@python.org>
References: <mailman.2057.1140187795.27775.python-list@python.org>
Message-ID: <Q6-dnZ0YXf_7x2venZ2dnUVZ_tSdnZ2d@comcast.com>

Abhisek Datta wrote:
> I am looking for good RSA implementations in python that can import a
> public key in PEM format and encrypt a buffer using the imported
> public key. I tried m2crypto, but somehow it is giving me exceptions
> which I couldnt solve as of now.

What you are trying to do should be covered by M2Crypto. Without more
context for the error (what was the file you were trying load, etc.) it
is hard to say what is wrong. My first guess is that your pem file did
not include the BEGIN/END lines.

I would suggest you take a look at the tests and samples included in
M2Crypto. They do show how to work with PEM files.


M2Crypto 0.15: http://wiki.osafoundation.org/bin/view/Projects/MeTooCrypto


From grante at visi.com  Sat Feb 25 07:55:09 2006
From: grante at visi.com (Grant Edwards)
Date: Sat, 25 Feb 2006 12:55:09 -0000
Subject: python-list/python-dev quoting style
References: <dtml9t$367$1@gemini.csx.cam.ac.uk> <dtnjdt$n9q$1@panix2.panix.com>
	<dto7um$ils$1@gemini.csx.cam.ac.uk> <dtoti4$nmj$1@panix3.panix.com>
	<dtouti$327$1@gemini.csx.cam.ac.uk>
Message-ID: <1200ktdnodqqr26@corp.supernews.com>

On 2006-02-25, Michael Hoffman <cam.ac.uk at mh391.invalid> wrote:

>> And who is "me", anyway?
>
> It's hard to believe that you don't understand who "me" is in
> a conversation between two people,

Since when is a Usenet news group a conversation between two
people?

> one of whom is identified as "Aahz" and is attributed words
> you yourself wrote.


-- 
Grant Edwards                   grante             Yow!  Not SENSUOUS... only
                                  at               "FROLICSOME"... and in
                               visi.com            need of DENTAL WORK... in
                                                   PAIN!!!


From apardon at forel.vub.ac.be  Thu Feb  9 05:23:18 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 9 Feb 2006 10:23:18 GMT
Subject: module with __call__ defined is not callable?
References: <mailman.1580.1139367500.27775.python-list@python.org>
	<pan.2006.02.08.10.21.24.46790@REMOVETHIScyber.com.au>
	<43ea0efd$1@nntp0.pdx.net>
Message-ID: <slrndum60m.10s.apardon@rcpc42.vub.ac.be>

Op 2006-02-08, Scott David Daniels schreef <scott.daniels at acm.org>:
> Steven D'Aprano wrote:
>> On Wed, 08 Feb 2006 13:58:13 +1100, Delaney, Timothy (Tim) wrote:
>> 
>>> adam johnson wrote:
>>>
>>>> Hi All.
>>>> I was wondering why defining a __call__ attribute for a module
>>>> doesn't make it actually callable. 
>>> For the same reason that the following doesn't work
>> [snip example]
>>> The __call__ attribute must be defined on the class (or type) - not on
>>> the instance. A module is an instance of <type 'module'>.
>> 
>> That's not a _reason_, it is just a (re-)statement of fact. We know that
>> defining a __call__ method on a module doesn't make it callable. Why not?
>> The answer isn't "because defining a __call__ method on a module or an
>> instance doesn't make it callable", that's just avoiding the question.
>
> You missed it.  Steven D'Aprano was telling you why, and all you heard
> was the no.  He stated a more general principal which controls why
> modules in particular are not callable.  It is not a design decision
> about modules; it is a design decision about classes and instances.
>
>      class SomeClass(object):
>           def __call__(self): return 'Text'
>
>      class AnotherClass(object):
>           def __repr__(self): return 'Missive'
>
>      name = SomeClass()()  # this works
>      name = AnotherClass()()  # this doesn't
>      obj = AnotherClass()  # build an instance
>      def fun(*args): return 'more text' # *args so nearly any call works
>      obj.__call__ = fun    # tack a function onto an instance
>      obj()  # note this doesn't call the function.
>
> Now, if you think the last _should_ do the call, then let's step
> back to classes.
>
>      class SomeClass(object):
>           def __call__(self): return 'Text'
>
> Now the SomeClass object (which is a subclass of object) has an
> attribute named "__call__".  Should that define how the expression
>      SomeClass()
> is evaluated?  Should that return the string 'Text' or create a
> new instance of SomeClass?

This make me wonder. Would it be possible to do something with
metaclasses so that after

     class SomeClass(MetaClass):
        ...

SomeClass() will be equivalent to MetaClass.__call__(SomeClass)

Just curious.

-- 
Antoon Pardon


From rtilley at vt.edu  Mon Feb 27 13:28:44 2006
From: rtilley at vt.edu (rtilley)
Date: Mon, 27 Feb 2006 13:28:44 -0500
Subject: different ways to strip strings
Message-ID: <dtvgd4$ci7$1@solaris.cc.vt.edu>

s = ' qazwsx '

# How are these different?
print s.strip()
print str.strip(s)

Do string objects all have the attribute strip()? If so, why is 
str.strip() needed? Really, I'm just curious... there's a lot  don't 
fully understand :)


From bdesth.quelquechose at free.quelquepart.fr  Wed Feb 15 18:19:13 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 16 Feb 2006 00:19:13 +0100
Subject: Python, Forms, Databases
In-Reply-To: <1140032343.627599.217590@g14g2000cwa.googlegroups.com>
References: <1140030788.083799.45060@f14g2000cwb.googlegroups.com>
	<xoOdnSSGbYRFHW7eRVn-og@comcast.com>
	<1140032343.627599.217590@g14g2000cwa.googlegroups.com>
Message-ID: <43f395f9$0$916$626a54ce@news.free.fr>

Tempo a ?crit :
> Larry I do see your point. There does seem to be a lot more support for
> PHP and MySQL together than there is Python and ASP. But I want to
> first try to accomplish my goal by using Python first before I give up
> and revert back to PHP. So if I was going to parse HTML forms and place
> the data into a MySQL database, what should I use? CGI module? Zope?
> Webware? Thanks for any and all help.

Depends on what your hosting provides. Zope seems definitively out of 
the field - it's not the right tool for the job, and it requires 
specific, professionnal hosting. I don't know to much about webware. 
Pure CGI is a PITA. Something that may do the job just fine is Myghty (a 
slightly enhanced Python port of Perl Mason). A great + for Myghty is 
that it will scale if your app grows (Myghty runs on CGI, FastCGI, 
mod_python, WSGI, and even on Python's HTTPServer).

My 2 cents


From grante at visi.com  Thu Feb 23 23:12:28 2006
From: grante at visi.com (Grant Edwards)
Date: Fri, 24 Feb 2006 04:12:28 -0000
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
References: <mailman.2369.1140730029.27775.python-list@python.org>
	<dtla7j$pqs$1@newsreader3.netcologne.de>
	<mailman.2373.1140731808.27775.python-list@python.org>
Message-ID: <11vt1tcq488uj3d@corp.supernews.com>

On 2006-02-23, Paul Probert <pprobert at wisc.edu> wrote:

>>In similar situation I would start to blame the hardware for the 
>>problem, so below a kind of checklist to go through:
>
>   Thanks for the reply. I should have mentioned, this happens to just 
> about every machine in our collection of about 20 machines. Each is of a 
> different age, and the hardware is completely diverse. Each has either 
> of NT4, win2k, or XP installed. They all belong to our domain

Time to dowload a linux CD then, eh?

-- 
Grant Edwards                   grante             Yow!  I am KING BOMBA of
                                  at               Sicily!...I will marry
                               visi.com            LUCILLE BALL next Friday!


From jm.suresh at gmail.com  Thu Feb 16 00:04:47 2006
From: jm.suresh at gmail.com (Suresh Jeevanandam)
Date: Thu, 16 Feb 2006 10:34:47 +0530
Subject: mapping functions and lambda
In-Reply-To: <dt1118$t2n$1@home.itg.ti.com>
References: <dt1118$t2n$1@home.itg.ti.com>
Message-ID: <dt115g$t2n$2@home.itg.ti.com>

I got it:
dict([k.split('=') for k in s.split(',')])

regards,
Suresh
Suresh Jeevanandam wrote:
> Given a string
> s = 'a=1,b=2'
> 
> I want to create a dictionary {'a': '1', 'b': '2'}
> 
> I did,
> 
> dict(map(lambda k: k.split('='), s.split(',')))
> 
> Is it possible to get rid of the lambda here, without having to define 
> another function just for this.
> 
> Is this the easiest/straight-forward way to do this?
> 
> regards,
> Suresh


From reply.in.the.newsgroup at my.address.is.invalid  Thu Feb 16 16:03:31 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Thu, 16 Feb 2006 22:03:31 +0100
Subject: define loop statement?
References: <lW4Jf.31559$3V4.8390@trnddc06>
Message-ID: <bvp9v1tjvebinb894vhrlu7n26euh3l73o@4ax.com>

David Isaac:
>I would like to be able to define a loop statement
>(nevermind why) so that I can write something like
>
>loop 10:
>    do_something
>
>instead of
>
>for i in range(10):
>    do_something
>
>Possible?  If so, how?

Yes. By implementing a compiler or an interpreter for your programming
language. Or a preprocessor that converts your language to Python, or some
other suitable intermediate language. Or a programmer, that converts your
pseudocode and some coffee to the desired algorithm :-)

-- 
Ren? Pijlman


From kay.schluehr at gmx.net  Sun Feb 26 16:17:52 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 26 Feb 2006 13:17:52 -0800
Subject: Tail Call Optimization as a Decorator
In-Reply-To: <1140987187.726096.112840@p10g2000cwp.googlegroups.com>
References: <1140981639.315995.34860@i39g2000cwa.googlegroups.com>
	<1140986376.438905.95360@t39g2000cwt.googlegroups.com>
	<1140987187.726096.112840@p10g2000cwp.googlegroups.com>
Message-ID: <1140988672.418596.229930@i39g2000cwa.googlegroups.com>


Crutcher wrote:
> I've tossed it to python-dev, but how do I submit it to the cookbook?

http://aspn.activestate.com/ASPN/Python/Cookbook/

I think it is a good place to stay accessible even if python-dev
overlooks it.

Kay



From peter at engcorp.com  Mon Feb 20 16:25:37 2006
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 20 Feb 2006 16:25:37 -0500
Subject: Python solutions for old Police software?
In-Reply-To: <1140454731.103842.221860@g14g2000cwa.googlegroups.com>
References: <1140454731.103842.221860@g14g2000cwa.googlegroups.com>
Message-ID: <dtdc4g$7dk$1@sea.gmane.org>

jf.ff at mail.com wrote:
> http://www.cityfremontof.com

This has nothing to do with Python, nor software.  It's totally 
off-topic spam.  Ignore.



From vercingetorix52 at yahoo.com  Tue Feb 28 14:11:12 2006
From: vercingetorix52 at yahoo.com (vercingetorix52 at yahoo.com)
Date: 28 Feb 2006 11:11:12 -0800
Subject: telnetlib problems
Message-ID: <1141153872.182746.289830@t39g2000cwt.googlegroups.com>

I'm trying to use a python script to access an embedded computer
running linux and connected via a crossover ethernet cable using the
following script...

...and I realize the username and password is not realistic... I'm
still in "proof of concept" stage here :)

#########################
import telnetlib

tn = telnetlib.Telnet('192.168.100.11')

tn.read_until('login: ', 5)

tn.write('user\n')

tn.read_until('Password: ', 5)

tn.write('password\n')

tn.read_until('bash-2.05$ ', 5)

tn.write('ls\n')

print tn.read_very_eager()
#########################

As a script, this doesn't work.  However, if I execute the same
commands interactively, it works fine.  If I insert some time delays as
follows...

#########################
import telnetlib
import time

tn = telnetlib.Telnet('192.168.100.11')

tn.read_until('login: ', 5)
time.sleep(2)
tn.write('user\n')

tn.read_until('Password: ', 5)
time.sleep(2)
tn.write('password\n')

tn.read_until('bash-2.05$ ', 5)

tn.write('ls\n')
time.sleep(2)
print tn.read_very_eager()
#########################

...and it works fine.  Can anyone tell me what's going on here? TIA



From spe.stani.be at gmail.com  Mon Feb 20 15:40:00 2006
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 20 Feb 2006 12:40:00 -0800
Subject: editor for Python on Linux
In-Reply-To: <43fa2376$0$1149$7a628cd7@news.club-internet.fr>
References: <dtai6e$23m$2@ariane.blic.net>
	<chlhv15ktc4u3adv34sgk63tok5vl9j50q@4ax.com>
	<43F8DA72.8040808@sympatico.ca>
	<43fa2376$0$1149$7a628cd7@news.club-internet.fr>
Message-ID: <1140468000.817123.196120@g14g2000cwa.googlegroups.com>

> (I never saw this elsewhere).

FYI SPE has these two features as well...

Stani
---
SPE - http://pythonide.stani.be



From cito at online.de  Tue Feb 14 07:04:22 2006
From: cito at online.de (Christoph Zwerschke)
Date: Tue, 14 Feb 2006 13:04:22 +0100
Subject: listing attributes
In-Reply-To: <pan.2006.02.14.11.03.42.625075@REMOVETHIScyber.com.au>
References: <1139884643.749492.221140@g43g2000cwa.googlegroups.com>
	<mailman.1876.1139887198.27775.python-list@python.org>
	<pan.2006.02.14.11.03.42.625075@REMOVETHIScyber.com.au>
Message-ID: <dssh03$7sa$1@online.de>

Steven D'Aprano wrote:
 > However it is easy to use introspection to get what you need.

So just for completeness sake, what Thomas probably wants is the following:

from types import MethodType

def attributes(obj):
    return [attr for attr in dir(obj)
     if not attr.startswith('__')
     and not isinstance(getattr(obj, attr), MethodType)]

# Example:

class Parrot(object):
     ATTR = None
     join = ''.join # callable, but not a method of Parrot
     def aMethod(self):
         return ATTR

print attributes(Parrot)

# this gives: ['ATTR', 'join']


From dylan.moreland at gmail.com  Thu Feb  9 00:47:59 2006
From: dylan.moreland at gmail.com (Dylan Moreland)
Date: 8 Feb 2006 21:47:59 -0800
Subject: how to remove <BR> using replace function?
References: <1139462640.951603.302830@g44g2000cwa.googlegroups.com>
Message-ID: <1139464079.635612.289930@o13g2000cwo.googlegroups.com>

I think you want to use the replace method of the string instance.
Something like this will work:

# See http://docs.python.org/lib/string-methods.html#l2h-196
txt = "an unfortunate <br> in the middle"
txt = txt.replace("<br>", "")



From donn at u.washington.edu  Thu Feb  2 17:53:53 2006
From: donn at u.washington.edu (Donn Cave)
Date: Thu, 02 Feb 2006 14:53:53 -0800
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
Message-ID: <donn-C3B8DF.14535302022006@gnus01.u.washington.edu>

In article <1138918102.863033.298700 at o13g2000cwo.googlegroups.com>,
 n.estner at gmx.de wrote:

> Having read previous discussions on python-dev I think I'm not the only
> Python programmer who doesn't particularly like python's "self"
> parameter:
> 
>     class Foo:
>         def bar(self, a,b):
>             return a+b
>     Foo().bar(1,2) => 3
> 
> The main reason (at least for me) is that there's simply too much
> "magic" in it. Why does the expression left of the '.' get promoted to
> the first parameter? It even goes further:
> 
>     Foo.bar(Foo(), 1,2)
> 
> works, but:
> 
>     Foo.bar(1,2,3)
> 
> doesn't, just because of the "magical first parameter" in a member
> function. But:
> 
>     Foo.__dict["bar"]__(1,2,3)
> 
> Does work.
> 
> The point is, I _do_ think it's a good idea to explicitly write
> "self.SomeMember" for member-access, so I thought: why can't we be
> equally explicit about member function declaration? Wouldn't it be nice
> if I could write (say, in Python 3k, or maybe later):
> 
>     class Foo:
>         def self.bar(a,b):
>             return a+b
>     Foo().bar(1,2) => 3
> 
> That way, the declaration would match the invocation (at least
> syntactically), and the "magic"-feeling is gone. In the long run, the
> "old-style" syntax (i.e. if there's no '.' in the method name) could be
> used for static methods.
> 
> What do you think?

I think you make it too complicated.  Why shouldn't all
functions be declared and called in the same way, that
would be the simplest thing for everyone.

    class Foo
        def bar(self, a, b):
            return a + b
    bar(Foo(), 1, 2) => 3

The virtues of this consistency become more apparent in a
more complex functional context:

    sys.stdin.write(open(file, 'r').read().split(sep)[0])

vs.
    write(sys.stdin, split(read(open(file, 'r')))[0])

   Donn Cave, donn at u.washington.edu


From marcus.tettmar at gmail.com  Fri Feb  3 11:19:42 2006
From: marcus.tettmar at gmail.com (marcus.tettmar at gmail.com)
Date: 3 Feb 2006 08:19:42 -0800
Subject: newbie - script works in PythonWin - fails from Python
In-Reply-To: <y80ssbu4.fsf@python.net>
References: <1138960717.927268.22640@g44g2000cwa.googlegroups.com>
	<1138961665.684357.78060@g44g2000cwa.googlegroups.com>
	<1138962543.290178.77790@g47g2000cwa.googlegroups.com>
	<pan.2006.02.03.11.04.13.213569@REMOVETHIScyber.com.au>
	<1138978837.557550.144350@f14g2000cwb.googlegroups.com>
	<y80ssbu4.fsf@python.net>
Message-ID: <1138983582.414125.73330@g14g2000cwa.googlegroups.com>

Unfortunately not.  Is there any doc anywhere that shows how to make
the script run from the command line the same way it does within
PythonWin?



From gregory.petrosyan at gmail.com  Tue Feb 14 08:18:25 2006
From: gregory.petrosyan at gmail.com (Gregory Petrosyan)
Date: 14 Feb 2006 05:18:25 -0800
Subject: Pythonic gui format?
In-Reply-To: <43f11990$0$667$626a54ce@news.free.fr>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<43f11990$0$667$626a54ce@news.free.fr>
Message-ID: <1139923105.939191.200660@z14g2000cwz.googlegroups.com>

> > Isn't it ugly a bit?
>I'd even say 'ugly 16-bits' !-)

You are right of course. Those  "examples"  are really bad, and, most
of all, really un-pythonic.

Thanks for JSON. It's more clean&simple than XML, but my main idea is
to remove any extra layer between Python and GUI. I want all GUI
elements/data to be directly accessible from Python (without extra
libraries).
Your dicts example is nice, but this  approach (and some others) lacks
one important feature: ordering of GUI elements. In XML, the order of
all elements is specified, and with dicts (or with very clean Georg's
model) it is not. (BTW remember topics about ordered dicts...)

I think that there should be a way for solving this problem, and I'll
certainly try to find it.
Thanks for your help.



From rtilley at vt.edu  Mon Feb 13 14:22:13 2006
From: rtilley at vt.edu (rtilley)
Date: Mon, 13 Feb 2006 19:22:13 +0000
Subject: invert the order of a string
In-Reply-To: <aq72v1l60fo3rv1r8oq9np7nc7i5ikueer@4ax.com>
References: <dsr600$9sj$1@solaris.cc.vt.edu>
	<6272v111vee95606gd7fucjdqmec8uhc7e@4ax.com>
	<dsr6n3$amh$1@solaris.cc.vt.edu>
	<aq72v1l60fo3rv1r8oq9np7nc7i5ikueer@4ax.com>
Message-ID: <dsr7q6$cnv$1@solaris.cc.vt.edu>

Dave Hansen wrote:
> It's just simple slicing.  Well, maybe not so simple, or at least not
> so common, but with a syntax similar to the range function.  Consider
> the following (string chosen to make it obvious what's going on):
> 
> s = "0123456789"
> s[::]
> s[3::]
> s[:3:]
> s[::3]
> s[::-2]
> s[-2::-2]

Well, it turns out to be the best way to invert a string, IMO. The 
reversed() feature returns a reversed object... not a reversed string. 
In short, I have to fool with it again _after_ it has been inverted. The 
slicing takes care of the job right away and gives me what I want... no 
Computer Sciencey <reversed object at 0xb6f6152c>> to deal with :)

I'm sure the reversed feature is much more generic though for dealing 
with other types.


From bill.scherer at verizonwireless.com  Mon Feb 20 07:46:27 2006
From: bill.scherer at verizonwireless.com (Bill Scherer)
Date: Mon, 20 Feb 2006 07:46:27 -0500
Subject: Python Oracle Interace on Solaris
In-Reply-To: <78E6A2FC276AD8428A8E2DBBB540855E038A0BE5@NYOBGCEXMB21.uswin.ad.vzwcorp.com>
References: <78E6A2FC276AD8428A8E2DBBB540855E038A0BE5@NYOBGCEXMB21.uswin.ad.vzwcorp.com>
Message-ID: <43F9BA23.6020801@verizonwireless.com>

Kenny wrote:

> Thanks... Im not sure if you would know how to solve this one, but when
> I ran my setup python scripts I got the error: library -lclntsh not
> found. In the instantclient folder the library exists... is this a
> matter of just copying the libraries to a different spot or just
> setting up the correct environment variables?
>
Not sure on Solaris... You might try exporting an LD_LIBRARY_PATH, or 
editing /etc/ld.so.conf and running ldconfig, if Solaris has such a thing.
I would caution against moving the library, it's probably already where 
it's expected to be. You have ORACLE_HOME set?


From xbello at gmail.com  Mon Feb 20 06:26:22 2006
From: xbello at gmail.com (XBello)
Date: 20 Feb 2006 03:26:22 -0800
Subject: os.mkdir simple help
References: <1140335502.110014.35870@g47g2000cwa.googlegroups.com>
	<pan.2006.02.19.08.02.33.411906@REMOVETHIScyber.com.au>
Message-ID: <1140434782.384240.254110@g44g2000cwa.googlegroups.com>

I'm new to python too, but I've read that sys.stdin.readline() is
preferred. Is that right?



From mailinglist4ken at gmail.com  Mon Feb 20 08:32:24 2006
From: mailinglist4ken at gmail.com (Kenneth Xie)
Date: Mon, 20 Feb 2006 21:32:24 +0800
Subject: any ftpd written in python?
In-Reply-To: <dt1oqf$2fvu$1@ns.felk.cvut.cz>
References: <mailman.1990.1140070096.27775.python-list@python.org>
	<dt1oqf$2fvu$1@ns.felk.cvut.cz>
Message-ID: <43F9C4E8.1020901@gmail.com>

garabik-news-2005-05 at kassiopeia.juls.savba.sk wrote:
> Kenneth Xie <mailinglist4ken at gmail.com> wrote:
>   
>> I need a simple ftpd example in pure python. Is there already such a 
>> ftpd available?
>> Thank you very much in advance.
>>     
>
> self-advertising: http://melkor.dnp.fmph.uniba.sk/~garabik/pyftpd.html
> it is a bit dated and I do not develop it anymore, but as a base of your
> own server software it can be quite good.
>
>   
Exactly what I need now, thank you very much.


From aleaxit at yahoo.com  Thu Feb  9 23:35:46 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Thu, 9 Feb 2006 20:35:46 -0800
Subject: Is Python good for web crawlers?
References: <1139330008.270988.227170@g44g2000cwa.googlegroups.com>
	<dscj3o$nll$1@wake.carmen.se>
	<1hafknf.1ft17us1sux13rN%aleaxit@yahoo.com>
	<mailman.1680.1139516891.27775.python-list@python.org>
Message-ID: <1haief6.149xrav1inly0nN%aleaxit@yahoo.com>

John J. Lee <jjl at pobox.com> wrote:
   ...
> I wonder if that little outfit has considered open-sourcing any of
> their web client code?

What they've open-sourced so far is listed at
<http://code.google.com/projects.html> -- of these, the only
crawl/spider is K?ngul?, so far.


Alex


From alex.gman at gmail.com  Tue Feb  7 20:01:31 2006
From: alex.gman at gmail.com (alex.gman at gmail.com)
Date: 7 Feb 2006 17:01:31 -0800
Subject: Xah's Edu Corner: Unix damage: color names
References: <1133844932.007824.26780@g43g2000cwa.googlegroups.com>
	<1134780763.066592.45390@g49g2000cwa.googlegroups.com>
	<1135405908.381150.133190@o13g2000cwo.googlegroups.com>
	<1136236586.734775.212440@f14g2000cwb.googlegroups.com>
	<1137784561.589887.58380@o13g2000cwo.googlegroups.com>
	<1139356437.987319.59280@g14g2000cwa.googlegroups.com>
Message-ID: <1139360491.583628.143830@g43g2000cwa.googlegroups.com>

So why don't you use Windows XP then? It's just like what you are using
now, but even more awesome!



From grante at visi.com  Fri Feb  3 19:08:56 2006
From: grante at visi.com (Grant Edwards)
Date: Sat, 04 Feb 2006 00:08:56 -0000
Subject: Python on Windows
References: <mailman.1389.1138987315.27775.python-list@python.org>
	<43E3EE2F.9040508@websafe.com>
Message-ID: <11u7s4oor8apa49@corp.supernews.com>

On 2006-02-03, Larry Bates <larry.bates at websafe.com> wrote:

>> What would folks suggest is the easiest way to package it to run on
>> other windows PCs?

Like the man said, my vote is for py2exe + inno-setup

>> I would love a single .exe file that would run without ANY OTHER FILES
>> even if it was 50 Mb!

Do you _really_ want a single exe?  I haven't seen a single exe
windows program in many years (except for putty, which is many
years old).

> Use py2exe to create distribution and then use Inno Installer to
> create a single setup.exe file that can easily be distributed.

Definitely.  Nobody does single .exe file windows programs
anymore.  A single-file installer is almost as easy.

-- 
Grant Edwards                   grante             Yow!  Where does it go when
                                  at               you flush?
                               visi.com            


From xavier.morel at masklinn.net  Sun Feb  5 12:55:53 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Sun, 05 Feb 2006 18:55:53 +0100
Subject: Importing a class, please help...
In-Reply-To: <slrnducdnv.2t1.grahn+nntp@frailea.sa.invalid>
References: <a1pFf.138$CO7.124@fe02.lga>
	<ds588l$aii$1@aphrodite.grec.isp.9tel.net>
	<slrnducdnv.2t1.grahn+nntp@frailea.sa.invalid>
Message-ID: <ds5dvt$7jp$1@apollon.grec.isp.9tel.net>

Jorgen Grahn wrote:
 > You are rude to an obvious newbie here ... please keep in mind that 
today's
 > stupid newbies are tomorrow's Python professionals.
 >
I didn't mean to be rude and apologize if that's the way it came out.

> Maybe he /is/ running Jython and failed to explain that properly?
 >
No, he explicitely stated that he's using Python 2.4 (I'm pretty sure 
Jython's latest release is 2.1) and SPE (which didn't handle Jython last 
time I tried it)

> If I
> understand things correctly, jar files are not tied to Java but to the java
> bytecode format -- which Java and Jython share.
> 
Yes, it's used to store/package compiled java classes (.class bytecode 
files) and various metadata associated to the classes (resources, ...) 
and therefore tied to the bytecode (or the JVM) indeed.


From claird at lairds.us  Thu Feb  9 17:08:03 2006
From: claird at lairds.us (Cameron Laird)
Date: Thu, 09 Feb 2006 22:08:03 GMT
Subject: Tkinter, X-windows and ebay
References: <1tqdncP3Ps7s6XfenZ2dnUVZ_tGdnZ2d@nmt.edu>
Message-ID: <bnqsb3-avr.ln1@lairds.us>

In article <1tqdncP3Ps7s6XfenZ2dnUVZ_tGdnZ2d at nmt.edu>,
Bob Greschke <bob at passcal.nmt.edu> wrote:
>When you post something on eBay (and other places) you can use a 'browse' 
>button on a web page to send a picture file from your hard drive to them for 
>inclusion in your listing.  Can the same kind of thing (not the same exact 
>thing, of course) be done with a Python/Tkinter program that is running on a 
>remote machine (that you logged into to start the program), but that's just 
>using your computer's display (with X11 on a Mac, X-whatever on Linux, 
>X-Win32 on Windows, etc.)?  I've got an inventory program that runs this way 
>and it would be nice if users could create a text file on their machine, but 
>then have the program read that file and, for example, update item 
>quantities according to information in that file.  Things like that.
			.
			.
			.
In a fairly well-defined sense, no; an X server isn't privileged,
in general, to access the host filesystem.  This is a *benefit* 
for security reasons.

I'm sympathetic with your desire.  One of us should return to the
topic later on variations that might suit you.


From steve at REMOVETHIScyber.com.au  Sun Feb 12 09:27:03 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Mon, 13 Feb 2006 01:27:03 +1100
Subject: Tracking down memory leaks?
References: <1139749861.949765.282310@z14g2000cwz.googlegroups.com>
Message-ID: <pan.2006.02.12.14.27.02.369270@REMOVETHIScyber.com.au>

On Sun, 12 Feb 2006 05:11:02 -0800, MKoool wrote:

> I have an application with one function called "compute", which given a
> filename, goes through that file and performs various statistical
> analyses.  It uses arrays extensively and loops alot.  it prints the
> results of it's statistical significance tests to standard out.  Since
> the compute function returns and I think no variables of global scope
> are being used, I would think that when it does, all memory returns
> back to the operating system.

I may be mistaken, and if so I will welcome the correction, but Python
does not return memory to the operating system until it terminates.

Objects return memory to Python when they are garbage collected, but not
the OS.


> Instead, what I see is that every iteration uses several megs more.
> For example, python uses 52 megs when starting out, it goes through
> several iterations and I'm suddenly using more than 500 megs of ram.
> 
> Does anyone have any pointers on how to figure out what I'm doing
> wrong?

How big is the file you are reading in? If it is (say) 400 MB, then it is
hardly surprising that you will be using 500MB of RAM. If the file is 25K,
that's another story.

How are you storing your data while you are processing it? I'd be looking
for hidden duplicates.

I suggest you re-factor your program. Instead of one giant function, break
it up into lots of smaller ones, and call them from compute. Yes, this
will use a little more memory, which might sound counter-productive at the
moment when you are trying to use less memory, but in the long term it
will allow your computer to use memory more efficiently (it is easier to
page small functions as they are needed than one giant function), and it
will be much easier for you to write and debug when you can isolate
individual pieces of the task in individual functions.

Re-factoring will have another advantage: you might just find the problem
on your own.


-- 
Steven.



From bblais at bryant.edu  Mon Feb  6 08:28:23 2006
From: bblais at bryant.edu (Brian Blais)
Date: Mon, 06 Feb 2006 08:28:23 -0500
Subject: critique my code, please
Message-ID: <43E74EF7.6000004@bryant.edu>

Hello,

I am including at the end of this document (is it better as an attachment?) some code
for a small gui dialog.  Since I am quite new to this, if anyone has any suggestions
for improvements to the code, bad coding practices, poor gui design, etc... I'd love
to hear it.  This list has been very helpful to me so far, and I hope to be able to
return the favor someday when I get good enough to take the training wheels off.  :)

The code makes a simple class, with some parameters, some of which are numbers, some
boolean, and one which is either a string or a number depending on context.  There is
a dialog class which allows you to edit/change the values, and a wrapper function of
the form:  new_params <== wrapper(old_params)  which calls the dialog, and returns
the updated params instance.

		thanks,

			Brian Blais

-- 
-----------------

             bblais at bryant.edu
             http://web.bryant.edu/~bblais

import wx
import copy

class SimulationParams(object):

     def __init__(self):

         self.epoch_number=500
         self.iter_per_epoch=500
         self.epoch_per_display=1
         self.random_seed='clock'
         self.keep_every_epoch=0
         self.save_input_vectors=0

     def __repr__(self):

         yesno={0:"No",1:"Yes",True:"Yes",False:"No"}

         s="Epoch Number: %d\n" % self.epoch_number
         s=s+"Iter Per Epoch: %d\n" % self.iter_per_epoch
         s=s+"Epoch Per Display: %d\n" % self.epoch_per_display
         if (isinstance(self.random_seed,str)):
             s=s+"Random Seed: %s\n" % self.random_seed
         else:
             s=s+"Random Seed: %d\n" % self.random_seed

         s=s+"Keep Every Epoch: %s\n" % yesno[self.keep_every_epoch]
         s=s+"Save Input Vectors: %s\n" % yesno[self.save_input_vectors]
         return(s)


class SimulationParamsDialog(wx.Dialog):

     def __init__(self,params,parent=None):

         self.params=params


         wx.Dialog.__init__(self, parent, -1, "Simulation Parameters")

         sizer = wx.BoxSizer(wx.VERTICAL)
         box = wx.BoxSizer(wx.HORIZONTAL)

         label = wx.StaticText(self, -1, "Epoch_Number:")
         box.Add(label, 0, wx.ALIGN_CENTRE|wx.ALL, 5)

         self.text1 = wx.TextCtrl(self, -1, str(params.epoch_number), size=(80,-1))
         box.Add(self.text1, 1, wx.ALIGN_CENTRE|wx.ALL, 5)

         sizer.Add(box, 0, wx.GROW|wx.ALIGN_CENTER_VERTICAL|wx.ALL, 5)

         box = wx.BoxSizer(wx.HORIZONTAL)
         label = wx.StaticText(self, -1, "Iterations Per Epoch:")
         box.Add(label, 0, wx.ALIGN_CENTRE|wx.ALL, 5)

         self.text2 = wx.TextCtrl(self, -1, str(params.iter_per_epoch), size=(80,-1))
         box.Add(self.text2, 1, wx.ALIGN_CENTRE|wx.ALL, 5)

         sizer.Add(box, 0, wx.GROW|wx.ALIGN_CENTER_VERTICAL|wx.ALL, 5)

         box = wx.BoxSizer(wx.HORIZONTAL)
         label = wx.StaticText(self, -1, "Epoch Per Display:")
         box.Add(label, 0, wx.ALIGN_CENTRE|wx.ALL, 5)

         self.text3 = wx.TextCtrl(self, -1, str(params.epoch_per_display), size=(80,-1))
         box.Add(self.text3, 1, wx.ALIGN_CENTRE|wx.ALL, 5)

         sizer.Add(box, 0, wx.GROW|wx.ALIGN_CENTER_VERTICAL|wx.ALL, 5)

         box = wx.BoxSizer(wx.HORIZONTAL)
         label = wx.StaticText(self, -1, "Random Seed:")
         box.Add(label, 0, wx.ALIGN_CENTRE|wx.ALL, 5)

         self.text4 = wx.TextCtrl(self, -1, str(params.random_seed), size=(80,-1))
         box.Add(self.text4, 1, wx.ALIGN_CENTRE|wx.ALL, 5)

         sizer.Add(box, 0, wx.GROW|wx.ALIGN_CENTER_VERTICAL|wx.ALL, 5)

         self.cb1 = wx.CheckBox(self, -1, "Keep Every Epoch")
         self.cb1.SetValue(params.keep_every_epoch)
         sizer.Add(self.cb1, 1, wx.GROW|wx.ALIGN_CENTRE|wx.ALL, 5)
         self.cb2 = wx.CheckBox(self, -1, "Save Input Vectors")
         self.cb2.SetValue(params.save_input_vectors)
         sizer.Add(self.cb2, 1, wx.GROW|wx.ALIGN_CENTRE|wx.ALL, 5)




         btnsizer = wx.StdDialogButtonSizer()

         btn = wx.Button(self, wx.ID_OK)
         btn.SetHelpText("The OK button completes the dialog")
         btn.SetDefault()
         btnsizer.AddButton(btn)

         btn = wx.Button(self, wx.ID_CANCEL)
         btn.SetHelpText("The Cancel button cnacels the dialog. (Cool, huh?)")
         btnsizer.AddButton(btn)
         btnsizer.Realize()


         sizer.Add(btnsizer, 1, wx.GROW|wx.ALIGN_CENTRE|wx.ALL, 5)
         self.SetSizer(sizer)
         sizer.Fit(self)


def SetSimParams(params):

     new_params=copy.copy(params)

     dlg=SimulationParamsDialog(params)
     val=dlg.ShowModal()

     if val == wx.ID_OK:
         new_params.epoch_number=eval(dlg.text1.GetValue())
         new_params.iter_per_epoch=eval(dlg.text2.GetValue())
         new_params.epoch_per_display=eval(dlg.text3.GetValue())

         if (dlg.text4.GetValue()=='clock'):
             new_params.random_seed='clock'
         else:
             new_params.random_seed=eval(dlg.text4.GetValue())

         new_params.keep_every_epoch=dlg.cb1.GetValue()
         new_params.save_input_vectors=dlg.cb2.GetValue()

         print "ok"
     else:
         print "cancel"

     dlg.Destroy()

     return(new_params)

if __name__ == '__main__':
     app = wx.PySimpleApp(0)

     params=SimulationParams()
     new_params=SetSimParams(params);

     print params
     print new_params
     app.MainLoop()




From grisha at apache.org  Fri Feb 24 10:16:21 2006
From: grisha at apache.org (Gregory (Grisha) Trubetskoy)
Date: Fri, 24 Feb 2006 10:16:21 -0500
Subject: [ANNOUNCE] Mod_python 3.2.8 (security)
Message-ID: <20060224101312.B97815@grisha.dyndns.org>


The Apache Software Foundation and The Apache HTTP Server Project are
pleased to announce the release of version 3.2.8 of mod_python.

This release addresses a vulnerability in mod_python's FileSession
object whereby a carefully crafted session cookie could potentially
permit an attacker to execute code on the server.

FileSession was introduced in mod_python 3.2.7 released on February 15
2006 and is not enabled by default, therefore only a very small number
of installations, if any, are likely to be affected by this issue.

There are no other changes or improvements from the previous version in
this release.

Mod_python is available for download from:

http://httpd.apache.org/modules/python-download.cgi

For more information about mod_python visit http://www.modpython.org/

Regards,

Gregory Trubetskoy



From felipe.lessa at gmail.com  Sat Feb 18 09:45:54 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sat, 18 Feb 2006 12:45:54 -0200
Subject: Should we still be learning this?
In-Reply-To: <veednZB1zsf4gGrenZ2dnUVZ_s-dnZ2d@is.co.za>
References: <xuGdnQRiLabDiGrenZ2dnUVZ_tWdnZ2d@is.co.za>
	<mailman.2092.1140267087.27775.python-list@python.org>
	<veednZB1zsf4gGrenZ2dnUVZ_s-dnZ2d@is.co.za>
Message-ID: <1140273955.5255.16.camel@kenshin>

Em S?b, 2006-02-18 ?s 15:13 +0200, Max escreveu:
> > I wonder if they need some updating.
> > 
> 
> And so does Dive Into Python (our textbook, diveintopython.org) which 
> has the same deficiencies in its outline.

Are they being *paid* for teaching? Then they should overcome this issue
of Dive Into Python by either using their own material our by improving
Dive Into Python and giving it back to the community.

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From gherron at islandtraining.com  Tue Feb 21 18:38:17 2006
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 21 Feb 2006 15:38:17 -0800
Subject: Module question
In-Reply-To: <1140561649.452528.250880@g44g2000cwa.googlegroups.com>
References: <1140559897.172126.43820@o13g2000cwo.googlegroups.com>	<1140560655.407740.273490@z14g2000cwz.googlegroups.com>
	<1140561649.452528.250880@g44g2000cwa.googlegroups.com>
Message-ID: <43FBA469.6090607@islandtraining.com>

Tuvas wrote:

>Could I just do this then?
>
>from foo import x?
>  
>
Yes, you can do it that way.  (f you have your modules importing each 
other in a circular fashion, then this can cause trouble as x may not be 
defined yet, so best to avoid that case.)

>One more question now that I've tried this. In my main function, I have
>alot of init code. I don't want this code to be re-ran when the second
>module imports the first. Is there any way around this? Thanks!
>
>  
>
It won't be run twice.  Module import is a two phase thing:

1.  Read/compile the module and run it, creating a module object.  (This 
is done only once -- the first time a module is  imported.)

2. Bind values in the importing code to the module or its attributes.  
(This is done every time a module is imported.)

So... Your init code will be executed once -- in phase 1, no matter how 
many times an import causes phase two to be performed.

Gary Herron


From cito at online.de  Wed Feb  8 18:17:02 2006
From: cito at online.de (Christoph Zwerschke)
Date: Thu, 09 Feb 2006 00:17:02 +0100
Subject: Python 2.4.2 using msvcrt71.dll on Win and compatibility issues
In-Reply-To: <43ea40aa$0$6793$9b622d9e@news.freenet.de>
References: <dsaqcf$jb5$1@online.de> <43E8F864.6050605@v.loewis.de>
	<dsb2nn$5qs$1@online.de> <43E922D0.4080407@v.loewis.de>
	<dscann$29j$1@online.de> <43ea40aa$0$6793$9b622d9e@news.freenet.de>
Message-ID: <dsdu5e$dgr$1@online.de>

Martin v. L?wis wrote:
> Christoph Zwerschke wrote:
>> I think this would only shift the problem. Because then I would have to
>> convert the msvcr71 stream I get from Python to a msvcrt stream. Using
>> fileno() (of msvcrt) to get the file descriptor will probably not work.
> 
> It actually would:
> 
> #define _fileno(_stream)  ((_stream)->_file)
> 
> This definition is the same in all CRT version, plus the _file member
> is at the same offset in all CRT versions. Microsoft apparently wants
> to support linkage of object files build with one CRT version against
> a different CRT version.
> 
> It *is* hacky, of course.

I see. So this approach could actually work. Thanks for the hint.

-- Christoph


From flingfly at gmail.com  Thu Feb 16 02:44:38 2006
From: flingfly at gmail.com (yy x)
Date: Thu, 16 Feb 2006 15:44:38 +0800
Subject: How to call a mothod in a class by the method name string and the
	instance?
Message-ID: <bb970ec80602152344q72faa01x@mail.gmail.com>

hi, all:
  for example, the following class:
class test:
    def funca(self):
        print  "in funca"
    def funcb(self):
        print  "in funcb"
t = test()
t.funca()

    In the plain way,  i will excute the funca by the code "t.funca() ",
but if i wanna to excute the funca by "t" and string "funca", how will i do?

maybe the idea is similiar to "call(t, "funca") ".

best regards.
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From steve at REMOVETHIScyber.com.au  Mon Feb 20 16:05:22 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Tue, 21 Feb 2006 08:05:22 +1100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<yfspsljp321.fsf@oc.ex.ac.uk>
	<1140441519.702761.326130@g14g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.20.21.05.17.947577@REMOVETHIScyber.com.au>

On Mon, 20 Feb 2006 05:18:39 -0800, Kay Schluehr wrote:

>> What's far more interesting to me, however, is that I think there a good
>> reasons to suspect python's slowness is more of a feature than a flaw: I'd not
>> be suprised if on the whole it greatly increases programmer productivity and
>> results in clearer and more uniform code.
> 
> Yes, it's Guidos master-plan to lock programmers into a slow language
> in order to dominate them for decades. Do you also believe that Al
> Quaida is a phantom organization of the CIA founded by neocons in the
> early '90s who planned to invade Iraq?

Of course not. The alternative, that Osama has been able to lug his
dialysis machine all over the Pakistan and Afghan mountains without being
detected for four years is *much* more believable. *wink*

I don't think it was the poster's implication that Guido deliberately
created a slow language for the sake of slowness. I think the implication
was more that Guido made certain design choices that increased
productivity and code clarity. (That much is uncontroversial.) Where the
poster has ruffled some feathers is his suggestion that if Guido had only
known more about the cutting edge of language design from CS, Python would
have been much faster, but also much less productive, clear and popular.

I guess the feather ruffling is because of the suggestion that Guido
merely _didn't_know_ about language features that would have increased
Python's speed at the cost of productivity, rather than deliberately
choose to emphasis productivity at the expense of some speed.



-- 
Steven.



From fredrik at pythonware.com  Sun Feb  5 09:21:10 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 5 Feb 2006 15:21:10 +0100
Subject: Interpreting Unicode scripts
References: <S7WdnXWtGeCAm3veRVny1g@pipex.net>
Message-ID: <ds51ko$8tp$1@sea.gmane.org>

Keith MacDonald wrote:

> I am considering embedding Python in a C++ application, which works
> internally in UTF-16.  The only API I can find for running scripts is
> PyRun_SimpleString(const char*).  Does that mean that Python is unable to
> execute scripts containing characters from more than one code page?

reading PEP 263 might help:

    http://www.python.org/peps/pep-0263.html

(summary: encode as utf-8, prepend "# coding: utf-8\n", and you're done)

</F>





From lucaberto at libero.it  Fri Feb 24 10:23:14 2006
From: lucaberto at libero.it (luca72)
Date: 24 Feb 2006 07:23:14 -0800
Subject: chrtohex
Message-ID: <1140794594.653270.242720@e56g2000cwe.googlegroups.com>

Hello again my friends

here's my new problem.

How i can translate chr in to hex or int to integer value?

Best Regards

Luca



From deets at nospam.web.de  Thu Feb  9 13:14:40 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 09 Feb 2006 19:14:40 +0100
Subject: Form1.show()
In-Reply-To: <1139506127.717796.284930@z14g2000cwz.googlegroups.com>
References: <1139506127.717796.284930@z14g2000cwz.googlegroups.com>
Message-ID: <451f4fF4ggbvU1@uni-berlin.de>

errmaker schrieb:
> hi ! iam newbie on python.
> how i can make form1 visible ? form just crated by pyqt
> 
> 
> 
> class Form1(QMainWindow):
>     def __init__(self,parent = None,name = None,fl = 0):
>         QMainWindow.__init__(self,parent,name,fl)
>         self.statusBar()
> 
>        ............
> 
>         if self.MenuBar.findItem(1):
>             self.MenuBar.findItem(1).setText(self.__tr("&File"))
>         if self.MenuBar.findItem(2):
>             self.MenuBar.findItem(2).setText(self.__tr("&Edit"))
>         if self.MenuBar.findItem(3):
>             self.MenuBar.findItem(3).setText(self.__tr("&Help"))
> 
> 
>     def fileNew(self):
>         print "Form1.fileNew(): Not implemented yet"
> 
>     ......
> 
> 
>     def __tr(self,s,c = None):
>         return qApp.translate("Form1",s,c)
> 

Look at teh examples of PyQt - you need to have an application instanced 
and calle its event-loop.


Diez


From grahn+nntp at snipabacken.dyndns.org  Sun Feb  5 12:48:18 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 5 Feb 2006 17:48:18 GMT
Subject: how to kill a python process?
References: <1139159404.912421.251960@g43g2000cwa.googlegroups.com>
Message-ID: <slrnduceiv.2t1.grahn+nntp@frailea.sa.invalid>

On 5 Feb 2006 09:10:04 -0800, MackS <mackstevenson at hotmail.com> wrote:
> Hello!
>
> This question does not concern programming in python, but how to manage
> python processes. Is there a way to "name" a python process? At least
> on Linux, if I have two python programs running, they both run under
> the name "python"
...
> Is there a way to make them run under their own names, e.g., to make it
> easier to kill them by name using killall?

Funny, I had to experiment a bit to see how it worked. This is surely a FAQ,
because it's important. IMHO, the interpreter for a Unix program should be
invisible, so that the program behaves like as a first-class process in
every way.

  $ python foo1.py

This one gets called 'python', as expected.

  $ head -1 foo2.py
  #!/usr/bin/env python
  $ ./foo2.py

This one gets called 'python', too. I've been using this version because I
read somewhere it was the recommended idiom -- but I will stop doing it now
that I know it mangles the process name.

  $ head -1 foo3.py
  #!/usr/bin/python
  $ ./foo3.py

This is the traditional shebang form used for shell and Perl scripts,
and it names the process 'foo3.py' so you can killall(1) it nicely.

> Or am I stuck with
> registering the pid of each python process I create and then refer to
> that list whenever I need to selectively stop one of them?

If a program starts another one and needs to kill it, it /should/ remember
its pid. You don't want programs which cannot live together on one machine
without killing each other's children.

But as I wrote above, you /do/ want to have meaningful information in
top(1), ps(1) and so on.  Having half a dozen processes named python (or
java, or whatever) and wanting to kill one specific is not my idea of fun
...

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From 3dbernard at gmail.com  Wed Feb  8 10:19:28 2006
From: 3dbernard at gmail.com (Bernard Lebel)
Date: Wed, 8 Feb 2006 07:19:28 -0800
Subject: get output of cmd-line command under MS windows
In-Reply-To: <slrndujm8k.2uf.mac@news.calmar.ws>
References: <slrndujm8k.2uf.mac@news.calmar.ws>
Message-ID: <61d0e2b40602080719q3bcbc3d1x2be109fe378353f9@mail.gmail.com>

You should give a go to os.popen( <system command here> ). Article
6.1.2 and 6.1.3 in the Python Library doc.

I recently wrote a program that would create a pipe using the popen()
method, and would enter a while loop. At each iteration, it would read
one line of the pipe output, and the loop would break when it gets an
empty line (indicating the running application is not running in this
case).

Example:

import os

oPipe = os.popen( "run C:/program files/my app/executable.exe" )

while 1:
	sLine = oPipe.read()
	print sLine
	if sLine == '':
		print 'No more line from pipe, exit.'
		break



Cheers
Bernard


On 2/8/06, calmar <mac at calmar.ws> wrote:
> Hi all,
>
> unfotunately, 'commands.getstatusoutput(command)' does not work under
> windows.
>
> Would there be any alternative?
>
> os.system also just provides the exit number I think.
>
> thanks a lot,
> and cheers
> marco
>
>
> --
>   calmar
>
>           (o_  It rocks: LINUX + Command-Line-Interface
>           //\
>           V_/_                     http://www.calmar.ws
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From sybrenUSE at YOURthirdtower.com.imagination  Tue Feb  7 04:17:25 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Tue, 7 Feb 2006 10:17:25 +0100
Subject: Detecting line endings
References: <1139236514.022464.319970@g14g2000cwa.googlegroups.com>
	<slrndueq4g.9pc.sybrenUSE@schuimige.unrealtower.org>
	<1139262968.081207.259100@f14g2000cwb.googlegroups.com>
Message-ID: <slrndugpd5.7q5.sybrenUSE@schuimige.unrealtower.org>

Fuzzyman enlightened us with:
> This is what I came up with. [...] Comments/corrections welcomed.

You could use a little more comments in the code, but apart from that
it looks nice.

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From steve at REMOVETHIScyber.com.au  Fri Feb 17 20:22:11 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sat, 18 Feb 2006 12:22:11 +1100
Subject: Class subscripting
References: <g3pcv1dj2ei00kf05rjdki0e6poo2favo2@4ax.com>
Message-ID: <pan.2006.02.18.01.22.11.27279@REMOVETHIScyber.com.au>

On Sat, 18 Feb 2006 01:09:22 +0100, Ronny Mandal wrote:

> Assume we have a class Foo, and instance called bar.
> 
> a variable called baz1 has the value 3.0, baz2 is uninitialized

Python doesn't have variables. It has names which are bound to objects. Do
you mean that the name baz1 is bound to the value 3.0?

Because Python has no variables, you can't have uninitialized variables.
You can have names which are bound to values (objects), and you can have
names which don't exist yet. Do you mean that baz2 is a name which doesn't
yet exist?

In other words, just so we are clear, at this point we have the following
Python code:


class Foo:
    pass

bar = Foo()
baz1 = 3.0
# baz2 not yet used.



> Is there a way of reflecting the variable with such syntax:
> 
> print bar[<var_index>], where var_index is a number representing
> internal index.
> 
> bar[<var_index>] = 4.2. #Setting baz2 to 4.2


No. But you can do better:

baz = {}  # holder for the values of the bazmatron.
baz[1] = 3.0
baz[2] = 4.2
baz[25] = 3.9

# Check if we have the third value for the bazmatron.

if baz.has_key(3): # "Look before you leap"
    print baz[3]

# Another way to do the same thing.
try:
    print baz[3]
except KeyError:
    print "No third value. Initializing it now."
    baz[3] = 0.0

# A third way.
print baz.get(3, 0)  # Prints 0 if no third value exists.

# A fourth way: print baz[3] with a default value of 0,
# and set the value if it doesn't already exist.
print baz.setdefault(3, 0)



-- 
Steven.



From techiepundit at futurepundit.com  Thu Feb  2 10:32:06 2006
From: techiepundit at futurepundit.com (Randall Parker)
Date: 2 Feb 2006 07:32:06 -0800
Subject: Python vs C for a mail server
In-Reply-To: <drt2t8$h4j$1@wake.carmen.se>
References: <mailman.3994.1138546139.27774.python-list@python.org>
	<mailman.1197.1138549204.27775.python-list@python.org>
	<1138728303.669646.36940@g49g2000cwa.googlegroups.com>
	<drqa42$8k8$1@wake.carmen.se>
	<1138805854.533303.279610@g49g2000cwa.googlegroups.com>
	<drt2t8$h4j$1@wake.carmen.se>
Message-ID: <1138894326.142420.158350@f14g2000cwb.googlegroups.com>


Magnus Lycka wrote:

> Or...don't you have automated tests? Ouch. If you (like me) feel a
> little lazy to write a lot of test scripts, you can use a test tool
> such as TextTest, that compares output between test runs, rather than
> forcing you to write lots of scripts with plenty of assertions. The
> effort required to get started is probably bigger there though. (I
> don't really know, it was all set up for me at work.)

Magnus,

The code I'm writing in Python is a test executive to test embedded C
code. Then tests get written in Python that the test executive
processes. No, I'm not going to write yet another layer of tests in
order to compensate for shortcomings in the Python language.

> It's also a pain to write unit tests, but it's much more rewarding
> than writing type declarations. Not only does it force you to think
> through the ramifications of changes, but you also document your
> intentions through your tests.

I do not have time to write unit tests for the Python classes. I  have
plenty of unit tests to write in Python for the embedded C modules.
When I run and hit a problem in Python I just  debug it and fix it.
That's a lot faster than writing unit tests.



From rtuhin at gmail.com  Wed Feb  1 09:53:11 2006
From: rtuhin at gmail.com (rtuhin at gmail.com)
Date: 1 Feb 2006 06:53:11 -0800
Subject: calling a class method in a python module
Message-ID: <1138805591.636063.301830@g14g2000cwa.googlegroups.com>

Hi

I am trying to write a C code to call a class function in a python
module. Here's my python module:

def fib(n):    # write Fibonacci series up to n
    a, b = 0, 1
    while b < n:
        print b,
        a, b = b, a+b

def fib2(n): # return Fibonacci series up to n
    result = []
    a, b = 0, 1
    while b < n:
        result.append(b)
        a, b = b, a+b
    return result

class MyClass:
    "A simple example class"
    i = 12345
    def f(self):
	return 'hello world'


Can anybody tell me how to call "f" in my C code?

Thanks,
Tuhin



From reply.in.the.newsgroup at my.address.is.invalid  Thu Feb  9 15:40:42 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Thu, 09 Feb 2006 21:40:42 +0100
Subject: CLI
References: <1139507308.888959.320480@f14g2000cwb.googlegroups.com>
Message-ID: <n5anu1p97hbn1tp44a13221nb9f7thqgq7@4ax.com>

mwt:
>I want to do programmatic terminal commands on unix with python - i.e.
>I want my program to issue commands to start and stop scripts, other
>programs, etc. I'm sure this must be fairly straightforward, but
>haven't been able to find a reference for it. Any help?

http://www.python.org/doc/2.4.2/whatsnew/node8.html

-- 
Ren? Pijlman


From bobrien18 at yahoo.com  Wed Feb  1 22:54:18 2006
From: bobrien18 at yahoo.com (KraftDiner)
Date: 1 Feb 2006 19:54:18 -0800
Subject: nDimensional sparse histogram in python.
In-Reply-To: <1ha3hrb.z9fahb1cxs03zN%aleaxit@yahoo.com>
References: <1138848672.791908.90050@g44g2000cwa.googlegroups.com>
	<1ha3gff.u4comocxo4ddN%aleaxit@yahoo.com>
	<1138849589.663600.301610@z14g2000cwz.googlegroups.com>
	<1ha3hrb.z9fahb1cxs03zN%aleaxit@yahoo.com>
Message-ID: <1138852458.567178.116980@g43g2000cwa.googlegroups.com>

Ok so this is nice.. Just one thing.. When you try to get a value from
a dictionary
and it isn't found in the dictionary things go bad...

Take this for example:

class histogram(object):
	def __init__(self):
		self.histo = {}

	def update(self, point):
		if self.histo.get(point) != None:
			self.histo[point] = self.histo[point] + 1
		else:
			self.histo[point] = 1

	def get(self, point):
		return self.histo[point]


hist = histogram()
hist.update((0,0,0))
hist.update((0,0,1))
hist.update((0,0,1))
hist.get((0,0,0))
hist.get((0,0,1))
hist.get((0,0,2))

spews out this error:

Traceback (most recent call last):
  File "histogram.py", line 21, in ?
    hist.get((0,0,2))
  File "histogram.py", line 12, in get
    return self.histo[point]
KeyError: (0, 0, 2)



From franck.perez at gmail.com  Fri Feb  3 22:44:28 2006
From: franck.perez at gmail.com (Franck PEREZ)
Date: Sat, 4 Feb 2006 04:44:28 +0100
Subject: Automatic class attribute
In-Reply-To: <43e3dcfb$1@nntp0.pdx.net>
References: <mailman.1398.1139005691.27775.python-list@python.org>
	<43e3dcfb$1@nntp0.pdx.net>
Message-ID: <f6b00e360602031944l662e67c1pa5261a292eecc386@mail.gmail.com>

On 2/3/06, Kirk McDonald <mooquack at suad.org> wrote:
> Franck PEREZ wrote:
> > Hello all,
> >
> > Considering the following code :
> >
> > class C(object):
> >    ...:     observers = []
> >    ...:
> >    ...:     @classmethod
> >    ...:     def showObservers(cls):
> >    ...:         print cls.observers
> >
> > class D1(C):
> >    ...:     observers = [] #could it be moved in C ?
> >
> > class D2(C):
> >    ...:     observers = [] #could it be moved in C ?
> >
> > I want each child class of C to have it's own "observers" class attribute.
> >
> > The code I provided works... but I'd like to avoid typing "observers =
> > []" in each child class.
> >
> > Is it possible to define something in C which would basically mean :
> > "for each child class, automatically bind a new list attribute called
> > observers" ?
> >
> > Are metaclasses a way ? Is it possible to avoid them ?
> > Thanks a lot,
> > Franck
>
> By an astounding coincidence, I was just working on a similar problem.
> Metaclasses can do this, no problem:
>
> class M(type):
>      def __init__(cls, name, bases, dict):
>          cls.observers = []
>
>      def showObservers(cls):
>          print cls.observers
>
> class C(object):
>      __metaclass__ = M
>
> class D1(C): pass
> class D2(C): pass
>
> -Kirk McDonald
> --
> http://mail.python.org/mailman/listinfo/python-list
>


Works great. Thanks a lot.


From duncan.booth at invalid.invalid  Mon Feb 20 03:52:09 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 20 Feb 2006 08:52:09 GMT
Subject: share function argument between subsequent calls but not between
	class instances!
References: <11vejkega5tbrc5@corp.supernews.com>
	<Xns976EAB5E52818duncanbooth@127.0.0.1>
	<87wtfsb9jc.fsf@rose.polar.local>
Message-ID: <Xns976F9371C4C90duncanbooth@127.0.0.1>

Ben Finney wrote:

> Duncan Booth <duncan.booth at invalid.invalid> writes:
>> If you intend to only use the default some of the time, and at other
>> times pass in a different list, then save the 'default' in the
>> instance and use a special marker value to indicate when you intend
>> the default to be used:
> 
> The most common idiom for such a marker is the None value.
> 

Can you provide any firm evidence that using None is more common?

Both uses are common. Use whichever you are happier with (except of course 
in the case where None is a potential value distinct from the default).


From donn at drizzle.com  Mon Feb 20 21:51:43 2006
From: donn at drizzle.com (Donn Cave)
Date: Tue, 21 Feb 2006 02:51:43 -0000
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com>
	<mailman.2160.1140440898.27775.python-list@python.org>
	<1140454473.335788@jetspin.drizzle.com>
	<pan.2006.02.20.21.59.12.636908@REMOVETHIScyber.com.au>
Message-ID: <1140490302.639049@jetspin.drizzle.com>

Quoth Steven D'Aprano <steve at REMOVETHIScyber.com.au>:
...
| Nobody denies that Python code running with no optimization tricks is
| (currently) slower than compiled C code. That's a matter of objective
| fact. Nobody denies that Python can be easily run in interactive mode.
| Nobody denies that *at some level* Python code has to be interpreted.
|
| But ALL code is interpreted at some level or another. And it is equally
| true that at another level Python code is compiled. Why should one take
| precedence over the other?

I have no idea, what precedence?  All I'm saying is that Python matches
what people think of as an interpreted language.  You can deny it, but
but it's going to look like you're playing games with words, and to no
real end, since no one could possibly be deceived for very long.  If you
give me a Python program, you have 3 choices:  cross your fingers and
hope that I have the required Python interpreter version, slip in a
25Mb Python interpreter install and hope I won't notice, or come clean
and tell me that your program needs an interpreter and I should check to
see that I have it.

	Donn Cave, donn at drizzle.com


From vinay_sajip at yahoo.co.uk  Tue Feb 14 06:29:45 2006
From: vinay_sajip at yahoo.co.uk (Vinay Sajip)
Date: 14 Feb 2006 03:29:45 -0800
Subject: Logging hangs thread after detaching a StreamHandler's terminal
In-Reply-To: <mailman.1882.1139898596.27775.python-list@python.org>
References: <mailman.1882.1139898596.27775.python-list@python.org>
Message-ID: <1139916585.907286.108290@z14g2000cwz.googlegroups.com>


python-list.overbored at spamgourmet.com wrote:
> Hi all,
>
> After many hours, I think I've found a bug in the logging module!
>
> If you add a (stdout) StreamHandler to a logger, then detach the
> terminal for that stdout, subsequent calls to log() will hang the
> calling thread.
>
> To reproduce this, write the following scripts (this was a small test
> case I came up with - maybe there's something simpler):
>
[scripts snipped]
> Run ./tryhup.bash. It will sit in an idle spin. Monitor the files
> /tmp/hup.out and /tmp/lup.out. Hit Ctrl-C on tryhup to kill it. The
> python process is still running, but is stalled (the .out files are no
> longer changing).
>
> If you remove the above labeled line, however, this doesn't happen.
>
> Can anybody please acknowledge this bug? Any temporary workarounds to
> this problem? Thanks in advance for looking into this and for hearing
> me in!

I tried these scripts on Ubuntu 5.10 and did not see the problem you
are experiencing. The script continues to run (printing dashes to the
console), and hup.out/lup.out are also updated continuously.

What's your configuration? Also, note that the logging module merely
opens the stream passed to the StreamHander for output, so check if in
your configuration you get a hang just doing a write to sys.stderr.

Best regards,

Vinay Sajip



From john_sips_teaz at yahooz.com  Sat Feb  4 22:05:00 2006
From: john_sips_teaz at yahooz.com (John M. Gabriele)
Date: Sat, 04 Feb 2006 22:05:00 -0500
Subject: fairly large webapp: from Java to Python. experiences?
In-Reply-To: <mailman.1424.1139092573.27775.python-list@python.org>
References: <1139005746.363918.267370@g47g2000cwa.googlegroups.com>
	<mailman.1424.1139092573.27775.python-list@python.org>
Message-ID: <QZdFf.2302$Np6.97@fe11.lga>

Shalabh Chaturvedi wrote:
> john_sips_teaz at yahooz.com wrote:
> 
> A class-to-class and method-to-method rewrite will give some but likely 
> not the full benefit of moving to Python. A redesign might be necessary 
> - making it more 'Pythonic' in the process. In my experience, many cruft 
> classes that exist in a Java design simply disappear when ported to 
> Python. See also http://dirtsimple.org/2004/12/python-is-not-java.html
> 
> Cheers,
> Shalabh
> 

Great link Shalabh. Thanks. :) Googling around, I'd also come across
that one.

---J

-- 
(remove zeez if demunging email address)


From bearophileHUGS at lycos.com  Fri Feb 10 09:33:27 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 10 Feb 2006 06:33:27 -0800
Subject: To paletted image
Message-ID: <1139582007.097659.116740@o13g2000cwo.googlegroups.com>

Hello, this time I have a question about PIL usage, maybe if Lundh has
some time he can answer me.
I am experimenting different color quantization algorithms, so having
computed the palette with a clustering function, I use the code below
to quantize the original image to produce an image without dithering
(so I can see better the quantization results).

I have seen that the *standard* distance function I use isn't standard
enough, because given the fixed palette computed by me, most graphics
programs give me a different (better) quantized image. I don't know
what's wrong/different in this quantize function, maybe you can tell
me.


I'd also like to know if there is a simpler code for PIL to do the same
thing (given my palette and a truecolor image), but this is less
important. I know the dither=Image.NONE for the im.convert() method,
but I don't know a good way to use it in this problem. (Note that the
quantize function below uses a perceptual-based color distance, but to
do the quantization with PIL I can settle with its standard color
distance function.)

Thank you,
bearophile


# Input:
# im = input truecolor image
# palette = a palette computed by me, of about 32 colors
# im_out = output image with no dithering

def quantize(data, palette_short):
  out_data = []
  for rgb in data:
    dist_min = 1e100
    closest_col = None
    for col_pos, pal_col in enumerate(palette_short):
      # Standard distance
      #dr = rgb[0] - pal_col[0]
      #dg = rgb[1] - pal_col[1]
      #db = rgb[2] - pal_col[2]
      #d = dr*dr + dg*dg + db*db
      d = perceptualColorDistance(rgb, pal_col)
      if d < dist_min:
        dist_min = d
        closest_col = col_pos
    out_data.append(closest_col)
  return out_data

#..........
import psyco; psyco.bind(quantize)

# Copy of palette, to speed up quantization
palette_short = list(palette)

# Add duplicated colors (the last one) to produce a palette of 256
colors
palette.extend( palette[-1] for i in xrange(256 - len(palette)) )

# Create empty paletted output image
im_out = Image.new("P", im.size, 0)

# Flatten the list of colors, for PIL
#flattened_palette = flatten(palette)
flattened_palette = [component for color in palette for component in
color]

# Put the computed palette in the output image
im_out.putpalette(flattened_palette)

# quantize the input image with the computed palette
out_data = quantize(data, palette_short)

# Put the computed data inside the output image
im_out.putdata(out_data)

# Save computed output image
im_out.save(out_filename)



From news at grauer-online.de  Sun Feb 19 06:38:26 2006
From: news at grauer-online.de (Uwe Grauer)
Date: Sun, 19 Feb 2006 12:38:26 +0100
Subject: ANN: FreeImagePy 1.2.2
In-Reply-To: <mailman.2006.1140100462.27775.python-list@python.org>
References: <43f43ec3$0$29107$5fc30a8@news.tiscali.it>	<dt223q$s9n$1@newsreader3.netcologne.de>
	<mailman.2006.1140100462.27775.python-list@python.org>
Message-ID: <dt9lbk$kl2$1@online.de>

Andrew Gwozdziewycz wrote:
>> Knowing some details about PIL and as good as no details about
>> FreeImage, I would like in this context to become enlightened by the
>> answer to the question, when does it make sense to use FreeImage instead
>> of PIL?
>>  From what I know up to now I can't see any use for FreeImage :-( .
> 
> both freeimagepy and freeimage are released under the GPL, PIL is not.
> 
> --
> Andrew Gwozdziewycz <apgwoz at gmail.com>
> http://ihadagreatview.org
> http://plasticandroid.org

Did you read the PIL licence?
Seems to be a more free licence than GPL.

"""
A. Software License

The Python Imaging Library is:

    Copyright ? 1997-2003 by Secret Labs AB
    Copyright ? 1995-2003 by Fredrik Lundh

By obtaining, using, and/or copying this software and/or its associated
documentation, you agree that you have read, understood, and will comply
with the following terms and conditions:

Permission to use, copy, modify, and distribute this software and its
associated documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appears in all copies,
and that both that copyright notice and this permission notice appear in
supporting documentation, and that the name of Secret Labs AB or the
author not be used in advertising or publicity pertaining to
distribution of the software without specific, written prior permission.

SECRET LABS AB AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO
THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS. IN NO EVENT SHALL SECRET LABS AB OR THE AUTHOR BE LIABLE FOR
ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
"""

Uwe


From tim.hochberg at ieee.org  Tue Feb 21 17:09:57 2006
From: tim.hochberg at ieee.org (Tim Hochberg)
Date: Tue, 21 Feb 2006 15:09:57 -0700
Subject: number ranges
In-Reply-To: <7xacckifpd.fsf@ruckus.brouhaha.com>
References: <e86a5fd00602131854s73191cbbu742d4434ad074908@mail.gmail.com>	<1139945386.3346.38.camel@pc1.cole.uklinux.net>	<43F8D881.5030804@sympatico.ca>	<gfmdnZrrLeHK22TenZ2dnUVZ_tCdnZ2d@comcast.com>	<43F97AA8.50005@REMOVEMEcyber.com.au>	<3_WdnUP9qr9XRmTenZ2dnUVZ_sydnZ2d@comcast.com>	<1hb1umb.wr2hsk1chby86N%aleaxit@yahoo.com>	<NMuKf.5613$%14.252734@news20.bellglobal.com>	<1hb2uq1.e7kdkt1z0ge4rN%aleaxit@yahoo.com>	<43FAD679.2040305@REMOVEMEcyber.com.au>	<1hb3o4u.trzcp41f11vxqN%aleaxit@yahoo.com>
	<7xacckifpd.fsf@ruckus.brouhaha.com>
Message-ID: <dtg343$e6r$1@sea.gmane.org>


[Lots of proposals snipped]

90% of my gripes with range disappeared with the addition of enumerate. 
However, if there's going to be another round of range literal proposals 
I might as well throw out what seems (to me anyway) like the only 
halfway obvious choice in the context of Python.

1. a:b:c is equivalent to slice(a,b,c) with the usual rules that missing 
values are mapped to None: Parentheses would be required where this 
construct would otherwise be ambiguous.

2. slice(a,b,c) grows an __iter__ method that returns a generator that 
produces an appropriate sequence of integers. This is easy to define for 
positive steps, but tricky for negative steps (more on that in a second).

Thus:

for i in (1::2): print i,
=> 1 3 5 ...

and

for i in (:10:3): print i,
=> 0 3 6 9


The tricky part is deciding what to with negative steps when the start 
is undefined. It's tempting to use 0 as the start, but I think -1 is 
actually better if slightly odd. The reason is that I think the 
following invariant should hold.

newlist = []
for i in someslice:
     try:
         newlist.append(origlist[i])
     except IndexError:
         break
assert(newlist == origlist[slice])

For that to work out, you want:

for i in (::-2): print i,
=> -1 -3 -5 ...

etc. I realize that this is quite similar to the rejected PEP 204 
syntax, but the addition of generators has reduced many of the problems 
that that PEP had.

I have no great need for range literals, but it seems that if there were 
to be one, one that fit together with the existing syntax would be 
better than making up something new.

-tim








From cfbolz at gmx.de  Sun Feb  5 16:14:30 2006
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Sun, 05 Feb 2006 22:14:30 +0100
Subject: Deterministic destruction and RAII idioms in Python
In-Reply-To: <7xoe1tmcnd.fsf@ruckus.brouhaha.com>
References: <1138652299.351951.36780@z14g2000cwz.googlegroups.com>	<1138669303.907322.272550@g47g2000cwa.googlegroups.com>
	<7xoe1tmcnd.fsf@ruckus.brouhaha.com>
Message-ID: <ds5prp$qbv$1@sea.gmane.org>

Paul Rubin wrote:
> plahey at alumni.caltech.edu writes:
> 
>>I looked at pep-0343, it looks interesting.  It is not what I really
>>want (deterministic destruction) 
> 
> 
> I think it's better.
> 
> 
>>As far as my comment about "mainstream" Python, I have always taken
>>CPython as "Python".  I guess this will have to change as Jython and
>>IronPython bring interesting things to the table, even if they do take
>>some things away in the process.
> 
> 
> Hopefully PyPy will become "mainstream".  How it handles GC, I'm not sure.

Right now PyPy gives (at compile-time) the choice between two GCs: naive 
reference counting and the conservative Boehm garbage collector 
(http://research.hp.com/personal/Hans_Boehm/gc/). Currently we are 
working on supporting other garbage collection strategies as well, like 
mark-and-sweep, a copying collector or some sort of sophisticated 
generational collector.

Cheers,

Carl Friedrich Bolz



From steve at REMOVETHIScyber.com.au  Sun Feb 19 16:43:25 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Mon, 20 Feb 2006 08:43:25 +1100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
Message-ID: <pan.2006.02.19.21.43.25.100008@REMOVETHIScyber.com.au>

On Sun, 19 Feb 2006 19:26:20 +0000, Alexander Schmolck wrote:

> Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> writes:
> 
>> DH a ?crit :
>> (snip)
>> > It is by design. Python is dynamically typed. It is essentially an
>> > interpreted scripting language like javascript or ruby or perl,
>> 
>> 
>> It's not a "scripting" language, and it's not interpreted.
> 
> Of course it is. What do you think happens to the bytecode? 

By that logic, all languages are interpreted. What do you think happens to
the machinecode?


-- 
Steven.



From andychambers2002 at yahoo.co.uk  Thu Feb  2 16:30:44 2006
From: andychambers2002 at yahoo.co.uk (andychambers2002 at yahoo.co.uk)
Date: 2 Feb 2006 13:30:44 -0800
Subject: classmethod and instance method
In-Reply-To: <drtr0v$95q$1@aphrodite.grec.isp.9tel.net>
References: <1138910923.048674.264840@g49g2000cwa.googlegroups.com>
	<drtr0v$95q$1@aphrodite.grec.isp.9tel.net>
Message-ID: <1138915844.118266.159770@g14g2000cwa.googlegroups.com>

Yes that's better.  Didn't know about the __class__ attribute.  I
thought there must be a way to access this but couldn't find it in the
docs.

Thanks,

Andy



From steve at hastings.org  Thu Feb 23 04:27:33 2006
From: steve at hastings.org (Steve R. Hastings)
Date: Thu, 23 Feb 2006 01:27:33 -0800
Subject: PyAtom, a Python module for creating Atom syndication feeds
References: <pan.2006.02.23.08.53.39.65246@hastings.org>
	<87mzgicute.fsf@voodoo.myself>
Message-ID: <pan.2006.02.23.09.27.32.582881@hastings.org>

> you don't follow PEP 8 guidelines

Why do you say this?  I don't think the code is perfectly polished and
ready to be called version 1.0, but I think it follows PEP 8 more than not.


> and AFAIK a module must be widespread and used by
> the community before can be accepted in the Python core.

I said I intend to donate it to PSF.  I didn't say they would do anything
with it...  :-)  That's up to them, of course.


> Good job :)

Thank you.
-- 
Steve R. Hastings    "Vita est"
steve at hastings.org    http://www.blarg.net/~steveha



From reply.in.the.newsgroup at my.address.is.invalid  Mon Feb 20 06:01:12 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Mon, 20 Feb 2006 12:01:12 +0100
Subject: multiple email recipients
References: <1140425098.309890.116610@o13g2000cwo.googlegroups.com>
Message-ID: <g98jv1l3r5p7g5s4u3p6jsaq61ep7587fp@4ax.com>

eight02645999 at yahoo.com:
>was wondering how to modify the code so as i can send to multiple email
>recipients using "TO"? thanks.

You add RFC 2822 headers.
http://www.ietf.org/rfc/rfc2822.txt
("3.6.3. Destination address fields")

-- 
Ren? Pijlman


From kent at kentsjohnson.com  Sat Feb 11 08:30:43 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Sat, 11 Feb 2006 08:30:43 -0500
Subject: Jython inherit from Java class
In-Reply-To: <1139594138.216488.12730@g14g2000cwa.googlegroups.com>
References: <1139344211.725580.263660@g47g2000cwa.googlegroups.com>
	<43eab05b_2@newspeer2.tds.net>
	<1139594138.216488.12730@g14g2000cwa.googlegroups.com>
Message-ID: <43ede2b8$1_1@newspeer2.tds.net>

Mark Fink wrote:
> Alan, Kent, many thanks this really helped!
> But there is still a problem I guess with inheritance. I use the java
> testsuit supplied with the original to test the server. If I use the
> Java FitServer the testsuite can be completed. I commented everything
> out from my class and it does not work??

Since you are getting the same error from the Java server and the Jython 
subclass maybe you should figure out the Java problem first? It seems to 
be a problem making a socket connection of some kind.

Kent

> ###### And the Java FitServer:
> D:\AUT_TEST>java -cp D:\\AUT_TEST\\fitnesse\\fitnesse.jar fit.FitServer
> localhost 1234 23
> Exception in thread "main" java.net.ConnectException: Connection
> refused: connect
>         at java.net.PlainSocketImpl.socketConnect(Native Method)
>         at java.net.PlainSocketImpl.doConnect(Unknown Source)
>         at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
>         at java.net.PlainSocketImpl.connect(Unknown Source)
>         at java.net.SocksSocketImpl.connect(Unknown Source)
>         at java.net.Socket.connect(Unknown Source)
>         at java.net.Socket.connect(Unknown Source)
>         at java.net.Socket.<init>(Unknown Source)
>         at java.net.Socket.<init>(Unknown Source)
>         at fit.FitServer.establishConnection(Unknown Source)
>         at fit.FitServer.establishConnection(Unknown Source)
>         at fit.FitServer.run(Unknown Source)
>         at fit.FitServer.main(Unknown Source)


From zhangchao19 at hotmail.com  Fri Feb 24 00:28:06 2006
From: zhangchao19 at hotmail.com (cn.popeye)
Date: Fri, 24 Feb 2006 13:28:06 +0800
Subject: Use UltraEdit run Python
Message-ID: <dtm71n$quv$1@news.cn99.com>

Use UltraEdit run Python

Run  UltraEdit

Menu :Advanced menu/Tool Configuration command

Command Line: python %n%e

Working Directory:%p

Menu Item Name: run python

checked "Save Active File"

Command Output (DOS Commands ONLY)

checked  " Capture the output to a list box "

click button "insert"

Action:
%P        Path only ("C:\project\test\")

%N        fileName only ("test")

%E        Extension only (".py")

%P%N%E is equal to %F which is ("C:\project\test\test.py") in the example
above.


------test.py-------
#Welcome Messages! This is test!
print 'welcome to Python world!!! '


run *.py

Menu: Advanced menu/run python

-- 
cn.popeey




From localpricemaps at gmail.com  Thu Feb  9 02:01:18 2006
From: localpricemaps at gmail.com (localpricemaps at gmail.com)
Date: 8 Feb 2006 23:01:18 -0800
Subject: how to remove <BR> using replace function?
In-Reply-To: <1139464079.635612.289930@o13g2000cwo.googlegroups.com>
References: <1139462640.951603.302830@g44g2000cwa.googlegroups.com>
	<1139464079.635612.289930@o13g2000cwo.googlegroups.com>
Message-ID: <1139465097.718510.291570@g47g2000cwa.googlegroups.com>

tried that, didn't work for me



From donn at u.washington.edu  Tue Feb 21 12:46:27 2006
From: donn at u.washington.edu (Donn Cave)
Date: Tue, 21 Feb 2006 09:46:27 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com>
	<mailman.2160.1140440898.27775.python-list@python.org>
	<1140454473.335788@jetspin.drizzle.com>
	<pan.2006.02.20.21.59.12.636908@REMOVETHIScyber.com.au>
	<1140490302.639049@jetspin.drizzle.com>
	<43FAD2C2.7080908@REMOVEMEcyber.com.au>
Message-ID: <donn-F5C9CE.09462721022006@gnus01.u.washington.edu>

In article <43FAD2C2.7080908 at REMOVEMEcyber.com.au>,
 Steven D'Aprano <steve at REMOVEMEcyber.com.au> wrote:
...
> Hey Donn, here is a compiled program for the PowerPC, 
> or an ARM processor, or one of IBM's Big Iron 
> mainframes. Or even a Commodore 64. What do you think 
> the chances are that you can execute it on your 
> x86-compatible PC? It's compiled, it should just 
> work!!! Right?
> 
> No of course not. If your CPU can't interpret the 
> machine code correctly, the fact that the code is 
> compiled makes NO difference at all.
> 
> In other words, I have three choices:
> 
> - cross my fingers and hope that you have the required 
> interpreter (CPU);
> 
> - slip in an interpreter install (perhaps an emulator) 
> and hope you won't notice;
> 
> - or come clean and tell you that my program needs an 
> interpreter ("Hey Donn, do you have a Mac you can run 
> this on?") and you should check to see that you have it.

Sure, all this is true, except for the term "interpreter."
You would surely not use the word that way, unless you
just didn't want to communicate.

Your paragraph above that starts with "No of course not",
even omits a point that everyone understands, you can in
fact expect a .py file will work independent of machine
architecture - like any interpreted language.  We all know
what native code compilation buys you and what it doesn't.

   Donn Cave, donn at u.washington.edu


From steve at REMOVETHIScyber.com.au  Sun Feb 12 12:38:03 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Mon, 13 Feb 2006 04:38:03 +1100
Subject: Is Forth for real?
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
	<1139754010.067582.214830@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>
	<1v44c3-geo.ln1@lairds.us>
Message-ID: <pan.2006.02.12.17.38.02.455701@REMOVETHIScyber.com.au>

On Sun, 12 Feb 2006 17:08:02 +0000, Cameron Laird wrote:

> In article <pan.2006.02.12.15.11.04.739314 at REMOVETHIScyber.com.au>,
> Steven D'Aprano  <steve at REMOVETHIScyber.com.au> wrote:
> 			.
> 			.
> 			.
>>on the web for each language. By comparison, even Forth gives 13 million
>>plus hits, and who uses Forth?
> 			.
> 			.
> 			.
> The programmers of, among other things, the FedEx bar-code reader,
> the Sun boot loader, and parts of the Space Shuttle.


Okay, so that's three... *wink*

You missed Apple's boot loader.

I love Forth. I'm no good at thinking at that low count-the-bytes level,
but if I was, I'd much prefer to use Forth than C or assembly. I've got a
bunch of Forth books here, and when I'm bored I read them for
entertainment, and dream. I love the fact that Forth is still in use. But
I'm under no illusions that there are millions of Forth developers getting
paid to write in Forth.



-- 
Steven.



From carsten at uniqsys.com  Fri Feb 17 16:38:38 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 17 Feb 2006 16:38:38 -0500
Subject: Add a month
In-Reply-To: <312cfe2b0602171310t59e5dc04ucfae760822e329d7@mail.gmail.com>
References: <1140173540.686250.205760@g44g2000cwa.googlegroups.com>
	<mailman.2046.1140175284.27775.python-list@python.org>
	<1140178539.803209.84960@g47g2000cwa.googlegroups.com>
	<312cfe2b0602171308j2e6ed284t2c5dd2c130166db1@mail.gmail.com>
	<312cfe2b0602171310t59e5dc04ucfae760822e329d7@mail.gmail.com>
Message-ID: <1140212318.32102.97.camel@dot.uniqsys.com>

On Fri, 2006-02-17 at 16:10, Gregory Pi?ero wrote:
> Actually, no wait, that's bad.  It doesn't increment the year.
> 
> Does anyone have a simple way to code this?
> 
> -Greg
> 
> 
> On 2/17/06, Gregory Pi?ero <gregpinero at gmail.com> wrote:
> > Here's how I do it:
> >
> > def monthify(anint):
> >     if anint%12==0:return 12
> >     else:return anint%12
> >
> > import datetime
> > d=datetime.datetime.today()
> > dplus1month=datetime.datetime(d.year,monthify(d.month+1),d.day)
> >
> > We need monthify because adding 1 to 12 is bad otherwise!
> >
> > -Greg
> >
> > On 17 Feb 2006 04:15:39 -0800, Paul Boddie <paul at boddie.org.uk> wrote:
> > > Fredrik Lundh wrote:
> > > >
> > > > what do you expect d_new to be after the operation ?  if the answer
> > > > is date(2006,3,17), what's date(2006,1,31) plus one month?
> > >
> > > February 31st, of course:
> > >
> > > http://sql-info.de/mysql/gotchas.html#1_14
> > >
> > > ;-)
> > >
> > > Paul
> > >
> > > --
> > > http://mail.python.org/mailman/listinfo/python-list
> > >
> >
> >
> > --
> > Gregory Pi?ero
> > Chief Innovation Officer
> > Blended Technologies
> > (www.blendedtechnologies.com)
> >
> 
> 

I don't know if this qualifies as simple, but it seems to work:

def addmonths(thedate,months):
  "Add <months> months to <thedate>."
  import datetime
  y,m,d = thedate.timetuple()[:3]
  y2, m2 = divmod(m+months-1, 12)
  return datetime.date(y+y2,m2+1,d)

Note that the date constructor will raise an exception if the result
happens to be an invalid date such as February 30th or November 31st.

-Carsten




From frank at chagford.com  Tue Feb  7 08:44:33 2006
From: frank at chagford.com (Frank Millman)
Date: 7 Feb 2006 05:44:33 -0800
Subject: Problem with odbc (pywin32) and unicode
In-Reply-To: <1138360733.866147.29680@g14g2000cwa.googlegroups.com>
References: <1138360733.866147.29680@g14g2000cwa.googlegroups.com>
Message-ID: <1139319873.933801.173190@z14g2000cwz.googlegroups.com>


Frank Millman wrote:
> Hi all
>
> I am using odbc from pywin32 to connect to MS SQL Server. I am changing
> my program from the old (incorrect) style of embedding values in the
> SQL command to the new (correct) style of passing the values as
> parameters. I have hit a problem.
>
> The following all work -
>     cur.execute("select * from users where userid = '%s'" % 'frank')  #
> old style
>     cur.execute("select * from users where userid = '%s'" % u'frank')
> # old style
>     cur.execute("select * from users where userid = ?", ['frank'])  #
> new style
>
> This does not work -
>     cur.execute("select * from users where userid = ?", [u'frank'])  #
> new style
>
> I get the following error -
> OdbcError: Found an insert row that didn't have 1 columns [sic]
>
> It is the combination of new style and unicode that does not work.
>
> I realise that odbc is not fully DB-API compliant, but I have got away
> with it up to now. Does anyone know of a solution to this problem?
>
> Thanks
>
> Frank Millman
>

I am pleased to report that this has been fixed.

I have been liaising with Mark Hammond, and he has sent me a revised
version which behaves correctly.

This is from Mark -

"I'd be happy for you to mention this fix will be in build 208 - I just
can't tell you when that will be :)"

Frank



From reply.in.the.newsgroup at my.address.is.invalid  Wed Feb 15 11:55:29 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Wed, 15 Feb 2006 17:55:29 +0100
Subject: Embedding a binary file in a python script
References: <1140021879.698353.324230@o13g2000cwo.googlegroups.com>
Message-ID: <f5n6v1h020td0rkf2p6tiq63ck63sii0o1@4ax.com>

mrstephengross:
>I want to find a way to embed a tar file *in* my python script, and
>then use the tarfile module to extract it. That is, instead of
>distributing two files (extractor.py and archive.tar) I want to be able
>to distribute *one* file (extractor-with-embedded-archive.py). Is there
>a way to do this? 

I guess you can uuencode your tar file, and put the result in a multiline
string. See module 'uu'.

-- 
Ren? Pijlman


From fuzzyman at gmail.com  Wed Feb 22 16:16:14 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 22 Feb 2006 13:16:14 -0800
Subject: Newbie question: Multiple installations of Python on Windows
	machines
In-Reply-To: <mailman.2313.1140642001.27775.python-list@python.org>
References: <mailman.2185.1140472875.27775.python-list@python.org>
	<1140519304.913540.296600@g14g2000cwa.googlegroups.com>
	<mailman.2313.1140642001.27775.python-list@python.org>
Message-ID: <1140642974.386791.107270@o13g2000cwo.googlegroups.com>


Don Taylor wrote:
> Fuzzyman wrote:
>
> > A lot of 'exe' installers are special types of zip archvies. You might
> > be able to open it using winzip or winrar and do a manual install.
>
> Interesting suggestion that would never have occured to me.  One of the
> unzippers I tried (IZArc) did show me a directory of the contents, but
> it would still not let me extract the files.
>
> > Another alternative is to use the free VMWare player to create a fresh
> > windows install that will run in a window. You can then install Python
> > 2.3 and your application and extract the files you need to see if you
> > can make it work under Python 2.4.
>
> So I tried this and copied the files from my virtual machine to the
> site-packages folder on my real Python 2.4 machine, I then ran into
> there being a compiled extension.
> >
> > If the application contains compiled extensions then they won't be
> > portable from Python 2.3 to Python 2.4 - however the application will
> > almost certainly run with Movable Python 2.3 (which won't interfere at
> > all with your Python 2.4 install).
> >
> >    http://www.voidspace.org.uk/python/movpy/
>
> I could use a virtual machine with 2.3 installed, but neither option
> appeals to me right now as I want to use the rest of my Python installed
>   stuff (and Eclipse Pydev) stuff - which is why I wanted to continue
> with Python 2.4 in the first place.
>
> I have got a copy of the C source for the extension, can anybody give
> me/point me a cookbook recipe for making my own version of the extension
> that will play with 2.4?  This is for Windows XP and I don't currently
> have a C compiler installed.
>

It means installing a compiler (but I don't see a way around that) -
but this worked for me :

    http://www.vrplumber.com/programming/mstoolkit/index.html

So long as the module can be installed with distutils, the instuctions
there will work for you. Hefty download though.

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml

> > Fuzzyman
> 
> Some great suggestions.
> 
> Thanks,
> 
> Don.



From cito at online.de  Wed Feb  8 03:44:16 2006
From: cito at online.de (Christoph Zwerschke)
Date: Wed, 08 Feb 2006 09:44:16 +0100
Subject: apostrophe or double quote?
In-Reply-To: <mailman.1589.1139373128.27775.python-list@python.org>
References: <1139370460.360400.232500@z14g2000cwz.googlegroups.com>
	<mailman.1589.1139373128.27775.python-list@python.org>
Message-ID: <dscb10$2km$1@online.de>

Steve Holden wrote:
> It's just easier to have two permitted string quotes. That way, if your 
> string has an apostrophe in it you can say
> 
>     s = "it's"

It's particularly handy if you are building strings of a language that 
already has its own quotes, e.g. SQL or XML:

sql_snippet = " where name='Max'"
html_snippet = ' align="left"'

-- Christoph


From steve at REMOVETHIScyber.com.au  Mon Feb 27 06:18:12 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Mon, 27 Feb 2006 22:18:12 +1100
Subject: how do I factor a number down to one digit?
References: <1141036302.641818.72570@i39g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.27.11.18.11.778580@REMOVETHIScyber.com.au>

On Mon, 27 Feb 2006 02:31:42 -0800, Allan wrote:

> I'm trying to write a numerology program where I have each letter
> identified by a numerical value like
> a=1
> b=2
> c=3
> as so forth. I then input a name. How do I treat each letter as a
> single value? That is, instead of print myname I have to do a print
> m+y+n+a+m+e which returns a number. I next want to convert the
> resulting two or three digit number to a single digit. Like 123 would
> be 1+2+3 returning a 5. I hope this isn't too stupid of a question.

Sounds like homework to me.

Here is a hint:

myname = "steven"
for c in myname:
    do_something_with(c)

does some work with each individual letter of myname.

You want something that takes 'a', and gives 1, 'b' which gives 2, 'c'
which gives 3, and so forth. In other words, you want to map letters of
the alphabet to numbers. Hint: experiment with dictionaries.

sum = 0
myname = "steven"
for c in myname:
    sum = sum + map_letter_to_number_somehow

That's the first half of the problem. Chew on that for a while, and if you
still need help, come back and ask.


-- 
Steven.



From erniedude at gmail.com  Mon Feb  6 11:51:24 2006
From: erniedude at gmail.com (Ernesto)
Date: 6 Feb 2006 08:51:24 -0800
Subject: Size of list
In-Reply-To: <mailman.1499.1139244067.27775.python-list@python.org>
References: <1139243538.269506.214060@f14g2000cwb.googlegroups.com>
	<mailman.1499.1139244067.27775.python-list@python.org>
Message-ID: <1139244684.381944.294440@f14g2000cwb.googlegroups.com>

Thanks !



From deets at nospam.web.de  Fri Feb 17 06:58:09 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 17 Feb 2006 12:58:09 +0100
Subject: Terminating a function
References: <mailman.2045.1140174459.27775.python-list@python.org>
Message-ID: <45ls4mF7ch23U1@uni-berlin.de>

Astan Chee wrote:

> Hi,
> Im rather new to threads in python but Im trying to terminate a function
> call (or the execution of the function) after a certain period of time
> has passed.
> Do i need to use threads with this? if i do, how do i go about doing it?

Yes and no. As you didn't tell us muc about your actual problem, threads
might be what you need. But you _can't_ just stop a thread - however,
depending on what you do, you can for example regularly check for a flag
inside your function and then  terminate:

class Foo(threading.Thread):
   def __init__(self):
      super(Foo, self).__init__()
      self.setDaemon(True)
      self.interrupted = False

   def run(self):
       while not self.interrupted:
           do_some_work_but_make_sure_to_come_back_regularly()


f = Foo()
f.start()

time.sleep(10)
f.interrupted = True

Diez


From grante at visi.com  Tue Feb 21 10:07:26 2006
From: grante at visi.com (Grant Edwards)
Date: Tue, 21 Feb 2006 15:07:26 -0000
Subject: Print a PDF transparently
References: <mailman.2210.1140513215.27775.python-list@python.org>
Message-ID: <11vmb5ehmh5ro7f@corp.supernews.com>

On 2006-02-20, Tim Golden <tim.golden at viacom-outdoor.co.uk> wrote:
> [Daniel Crespo]
>| 
>| > Have you seen this?
>| >     http://tgolden.sc.sabren.com/python/win32_how_do_i/print.html
>| > In particular, the section on using win32print directly.
>| 
>| Yes, I have. The problems is that an external program is launched for
>| handling the file and print it. 
>
> [sorry, bit long-winded, but trying to help]
>
> I think the poster was referring to the situation you 
> described where the problem reduced to sending a .ps
> file directly to a postscript-capable printer.

<ob gloat>
People are still using OS distributions that don't know how to
print Postscript or PDF "out of the box"? 

All of the decent Linux distros have had the ability to print
postscript/PDF files "transparently" for many, many years (even
to non-postscript printers).

Sheesh.
</ob gloat>

-- 
Grant Edwards                   grante             Yow!  Four thousand
                                  at               different MAGNATES, MOGULS
                               visi.com            & NABOBS are romping in my
                                                   gothic solarium!!


From steve at holdenweb.com  Tue Feb 21 04:10:22 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 21 Feb 2006 04:10:22 -0500
Subject: fast text processing
In-Reply-To: <dteiec$o7m$1@news.ox.ac.uk>
References: <dteiec$o7m$1@news.ox.ac.uk>
Message-ID: <43FAD8FE.2050403@holdenweb.com>

Alexis Gallagher wrote:
> (I tried to post this yesterday but I think my ISP ate it. Apologies if 
> this is a double-post.)
> 
> Is it possible to do very fast string processing in python? My 
> bioinformatics application needs to scan very large ASCII files (80GB+), 
> compare adjacent lines, and conditionally do some further processing. I 
> believe the disk i/o is the main bottleneck so for now that's what I'm 
> optimizing. What I have now is roughly as follows (on python 2.3.5).
> 
> filehandle = open("data",'r',buffering=1000)

This buffer size seems, shall we say, unadventurous? It's likely to slow 
things down considerably, since the filesystem is probably going to 
naturally wnt to use a rather larger value. I'd suggest a 64k minumum.
> 
> lastLine = filehandle.readline()
> 
I'd suggest

lastTokens = filehandle.readline().strip().split(delimiter)

here. You have no need of the line other than to split it into tokens.

> for currentLine in filehandle.readlines():
> 
Note that this is going to read the whole file in to (virtual) memory 
before entering the loop. I somehow suspect you'd rather avoid this if 
you could. I further suspect your testing has been with smaller files 
than 80GB ;-). You might want to consider

for currentLine in filehandle:

as an alternative. This uses the file's generator properties to produce 
the next line each time round the loop.

>      lastTokens = lastLine.strip().split(delimiter)

The line above goes away if you adopt the loop initialization suggestion 
above. Otherwise you are repeating the splitting of each line twice, 
once as the current line then again as the last line.

>      currentTokens = currentLine.strip().split(delimiter)
> 
>      lastGeno = extract(lastTokens[0])
>      currentGeno = extract(currentTokens[0])
> 
If the extract() operation is stateless (in other words if it always 
produces the same output for a given input) then again you are 
unecessarily repeating yourself here by running extract() on the same 
data as the current first token and the last first token (if you see 
what I mean).

I might also observe that you seem to expect only two tokens per line. 
If this is invariable the case then you might want to consider writing 
an unpacking assignment instead, such as

        cToken0, cToken1, newline = currentLine.strip().split(delimiter)

to save the indexing. Not a big deal, thugh, and it *will* break if you 
have more than one delimiter in a line, as the interpreter won;t then 
know what to do with the third and subsequent elements.

>      # prepare for next iteration
>      lastLine = currentLine
> 
Of course now you are going to try and strip the delimiter off the line 
and split it again when you loop around again. You should now just be 
able to say

     lastTokens = currentTokens

instead.

>      if lastGeno == currentGeno:
>         table.markEquivalent(int(lastTokens[1]),int(currentTokens[1]))
> 
> So on every iteration I'm processing mutable strings -- this seems 
> wrong. What's the best way to speed this up? Can I switch to some fast 
> byte-oriented immutable string library? Are there optimizing compilers? 
> Are there better ways to prep the file handle?
> 
I'm sorry but I am not sure where the mutable strings come in. Python 
strings are immutable anyway. Well-known for it. It might be a slight 
problem that you are creating a second terminator-less copy of each 
line, but that's probably inevitable.

Of course you leave us in the dark about the nature of 
table.markEquivalent as well. Depending on the efficiency of the 
extract() operation you might want to consider short-circuiting the loop 
if the two tokens have already been marked as equivalent. That might be 
a big win or not depending on relative efficiency.

> Perhaps this is a job for C, but I am of that soft generation which 
> fears memory management. I'd need to learn how to do buffered reading in 
> C, how to wrap the C in python, and how to let the C call back into 
> python to call markEquivalent(). It sounds painful. I _have_ done some 
> benchmark comparisons of only the underlying line-based file reading 
> against a Common Lisp version, but I doubt I'm using the optimal 
> construct in either language so I hesitate to trust my results, and 
> anyway the interlanguage bridge will be even more obscure in that case.
> 
Probably the biggest gain will be in simply not reading the whole file 
into memory by calling its .readlines() method.

Summarising. consider something more like:

filehandle = open("data",'r',buffering=64*1024)
# You could also try just leaving the buffering spec out

lastTokens = filehandle.readline().strip().split(delim)
lastGeno = extract(lastTokens[0])

for currentLine in filehandle:

     currentTokens = currentLine.strip().split(delim)
     currentGeno = extract(currentTokens[0])
     if lastGeno == currentGeno:
         table.markEquivalent(int(lastTokens[1]), int(currentTokens[1]))

     lastGeno = currentGeno
     lastTokens = currentTokens

> Much obliged for any help,
> Alexis

Hope this is.

one last thought: the bioPython package will potentially save you huge 
amounts of time. They guys who developed and maintain it have done a lot 
of genome-slinging, and they appear to know what they are doing.

They may have already solved several problems you are struggling with.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From python at hope.cz  Tue Feb 14 02:40:56 2006
From: python at hope.cz (Lad)
Date: 13 Feb 2006 23:40:56 -0800
Subject: Encoding
In-Reply-To: <1139854271.073914.37950@o13g2000cwo.googlegroups.com>
References: <1139853781.611888.60230@g44g2000cwa.googlegroups.com>
	<1139854271.073914.37950@o13g2000cwo.googlegroups.com>
Message-ID: <1139902856.631907.105790@o13g2000cwo.googlegroups.com>

Yes, 'some data'.decode('utf8').encode('windows-1250')
works great.
Thanks
L.B.



From klachemin at comcast.net  Wed Feb 15 15:48:51 2006
From: klachemin at comcast.net (Kamilche)
Date: 15 Feb 2006 12:48:51 -0800
Subject: Publish/subscribe event manager using weakrefs
Message-ID: <1140036531.473680.95360@f14g2000cwb.googlegroups.com>

'''

event.py

An event manager using publish/subscribe, and weakrefs.
Any function can publish any event without registering it first, and
any
object can register interest in any event, even if it doesn't exist
yet.
The event manager uses weakrefs, so lists of listeners won't stop them
from being garbage collected when they're deleted.

Any suggestions are appreciated!

Sample output:

>>>

EVENT init (0 listeners, possibly dead) ('No one is interested in this
event',)
EVENT ball (0 listeners, possibly dead) ('Look! A ball, but no one is
watching.',)
*** Fido is interested in Bone
*** Fido is interested in Ball
EVENT ball (1 listeners, possibly dead) ('Another ball! Watch, Fido!',)
*** Fido noses the ball forward
*** Fido is dead.
EVENT ball (1 listeners, possibly dead) ('No one is watching because
Fido is dead.',)
Removing <weakref at 00CE9F90; dead> from ball
*** Snowball is interested in Ball
*** Snowball is interested in Yarn
*** Snowball is interested in Fluffy chick
*** Spot is interested in Bone
*** Spot is interested in Ball
EVENT bone (2 listeners, possibly dead) ('Only dogs eat bones.',)
Removing <weakref at 00CE9F90; dead> from bone
*** Spot slobbers on the bone
EVENT ball (2 listeners, possibly dead) ('Cats and dogs both love this
one!',)
*** Snowball chases the ball
*** Spot noses the ball forward
EVENT yarn (1 listeners, possibly dead) ('ball of pink yarn',)
*** Snowball bats at the yarn.
EVENT raking (0 listeners, possibly dead) ('Humans working in the
yard',)
EVENT fluffychick (1 listeners, possibly dead) ('Ooh, how cute! An
Easter leftover walking in the yard.',)
*** Snowball eats the fluffy chick.
Removing listener {'name': 'Snowball'} from event fluffychick
EVENT fluffychick (0 listeners, possibly dead) ('The cat is full and no
longer interested in chicks.',)
*** Snowball is dead.
*** Spot is dead.
EVENT ball (2 listeners, possibly dead) ('Ball anyone? Fluffy? Spot?
Fido?',)
Removing <weakref at 00CE9FC0; dead> from ball
Removing <weakref at 00CFA030; dead> from ball
Done!

>>>

'''

import weakref

_events = {}

def Subscribe(eventname, self):
    " Subscribe to an event, even if it doesn't exist yet."
    eventname = eventname.lower()
    eventname = eventname.replace(' ', '')
    if not eventname in _events:
        _events[eventname] = []
    listeners = _events[eventname]
    obj = weakref.ref(self)
    if not obj in listeners:
        listeners.append(obj)

def Unsubscribe(eventname, self):
    " Unsubscribe from an event, even if it never existed."
    eventname = eventname.lower()
    eventname = eventname.replace(' ', '')
    if not eventname in _events:
        return
    listeners = _events[eventname]
    obj = weakref.ref(self)
    if obj in listeners:
        print "Removing listener %s from event %s" % (str(self),
eventname)
        listeners.remove(obj)

def Raise(eventname, *args, **kwargs):
    " Publish an event, no need to register it first."
    eventname = eventname.lower()
    eventname = eventname.replace(' ', '')
    if not eventname in _events:
        _events[eventname] = []
    listeners = _events[eventname]
    print "EVENT %s (%d listeners, possibly dead) %s" % (eventname,
len(listeners), str(args))
    i = 0
    while i < len(listeners):
        obj = listeners[i]
        listener = obj()
        if listener:
            fnname = 'On' + eventname[0].upper() +
eventname[1:].lower()
            fn = getattr(listener, fnname, None)
            if fn == None:
                fn = getattr(listener, 'OnEvent')
            fn(eventname, *args, **kwargs)
            i += 1
        else:
            print "Removing %s from %s" % (str(obj), eventname)
            listeners.remove(obj)


class Listener:
    '''
    Objects that want to be notified of events.
    They should have an 'OnEventname' function for
    every event they're interested in, or a single
    function called 'OnEvent' to receive all events.
    '''
    _listen = []
    def __init__(self, **kwargs):
        self.__dict__.update(kwargs)
        for eventname in self._listen:
            Subscribe(eventname, self)
            print "*** %s is interested in %s" % (self.name, eventname)
    def OnEvent(self, eventname, *args, **kwargs):
        print "*** %s(%s, %s)" % (eventname, str(args), str(kwargs))
    def __str__(self):
        return str(self.__dict__)
    def __del__(self):
        print "*** %s is dead." % self.name




def main():

    class Dog(Listener):
        name = 'Dog'
        _listen = ['Bone', 'Ball']
        def OnEvent(self, eventname, *args, **kwargs):
            if eventname == 'bone':
                print "*** %s slobbers on the bone" % self.name
            elif eventname == 'ball':
                print "*** %s noses the ball forward" % self.name

    class Cat(Listener):
        name = 'Cat'
        _listen = ['Ball', 'Yarn', 'Fluffy chick']
        def OnBall(self, *args, **kwargs):
            print "*** %s chases the ball" % self.name
        def OnYarn(self, *args, **kwargs):
            print "*** %s bats at the yarn." % self.name
        def OnFluffychick(self, *args, **kwargs):
            print "*** %s eats the fluffy chick." % self.name

    Raise('INIT', 'No one is interested in this event')
    Raise('BALL', 'Look! A ball, but no one is watching.')
    dog = Dog(name = 'Fido')
    Raise('BALL', 'Another ball! Watch, Fido!')
    del dog
    Raise('BALL', 'No one is watching because Fido is dead.')
    cat = Cat(name = 'Snowball')
    dog = Dog(name = 'Spot')
    Raise('BONE', "Only dogs eat bones.")
    Raise('BALL', "Cats and dogs both love this one!")
    Raise('YARN', "ball of pink yarn")
    Raise('RAKING', 'Humans working in the yard')
    Raise('Fluffy chick', 'Ooh, how cute! An Easter leftover walking in
the yard.')
    Unsubscribe('fluffy chick', cat)
    Raise('Fluffy chick', 'The cat is full and no longer interested in
chicks.')
    del cat
    del dog
    Raise('BALL', 'Ball anyone? Fluffy? Spot? Fido?')
    
    
    print "Done!"

if __name__ == '__main__':
    main()



From saunders2005 at plusdsl.net  Sun Feb  5 20:09:42 2006
From: saunders2005 at plusdsl.net (Stephen)
Date: Mon, 6 Feb 2006 01:09:42 -0000
Subject: Newbie Help!
Message-ID: <43e6a1d4$0$6951$ed2619ec@ptn-nntp-reader02.plus.net>

Hi All,
        im new to python i just have a few questions and was wondering if 
you could help me??

1. what programming langaugue does python use? or which is most popular?

2. Does anyone know where i could get hold of practice code

3. Any good ebooks or links to start with. (according to the web this is the 
best place to start.)

i know you probally get asked these questions all the time! but im trying to 
mirgrate for windows to linux.

Cheers all
CFR 




From abhinavduggal at gmail.com  Sun Feb 19 10:37:57 2006
From: abhinavduggal at gmail.com (abhinav)
Date: 19 Feb 2006 07:37:57 -0800
Subject: Python multithreading on cluster system? Embedding python in PVM?
Message-ID: <1140363477.929902.44890@g44g2000cwa.googlegroups.com>

Hi guys.I have read that one cannot perform true multithreading in
python due to global interpreter lock mechanism.Suppose i have to
implement a crawler on a say cluster system like clusterknoppix so that
i can use parallel virtual machine (PVM)for programming in
multiprocessor environment or say open MPI.Can i integrate python with
PVM or MPI.Can i embed python into C for programming in multiprocessor
environment.Is there any way of embedding python in PVM or MPI so that
i can implement a true cluster based search engine?
Any help would be very kind.Thanks.



From mike.klaas at gmail.com  Mon Feb 27 17:05:30 2006
From: mike.klaas at gmail.com (Klaas)
Date: 27 Feb 2006 14:05:30 -0800
Subject: bsddb3 database file,
	are there any unexpected file size limits occuring in practice?
In-Reply-To: <dtk1u6$118$1@newsreader3.netcologne.de>
References: <dtj9gc$b33$1@newsreader3.netcologne.de>
	<1140670193.599122.325800@z34g2000cwc.googlegroups.com>
	<dtk1u6$118$1@newsreader3.netcologne.de>
Message-ID: <1141077930.320242.97990@v46g2000cwv.googlegroups.com>

Claudio writes:
> I am on a Windows using the NTFS file system, so I don't expect problems
> with too large file size.

how large can files grow on NTFS?  I know little about it.

> (I suppose it in having only 256 MB RAM available that time) as it is
> known that MySQL databases larger than 2 GByte exist and are in daily
> use :-( .

Do you have more ram now?  I've used berkeley dbs up to around 5 gigs
in size and they performed fine.  However, it is quite important that
the working set of the database (it's internal index pages) can fit
into available ram.  If they are swapping in and out, there will be
problems.

-Mike



From claird at lairds.us  Thu Feb  9 22:08:02 2006
From: claird at lairds.us (Cameron Laird)
Date: Fri, 10 Feb 2006 03:08:02 GMT
Subject: Hi reliability files, writing,reading,maintaining
References: <fhGGf.274074$vl2.129103@fe2.news.blueyonder.co.uk>
	<43eb4480$0$11064$e4fe514c@news.xs4all.nl>
	<ktpsb3-avr.ln1@lairds.us>
	<1uQGf.274691$vl2.62908@fe2.news.blueyonder.co.uk>
Message-ID: <k6atb3-c95.ln1@lairds.us>

In article <1uQGf.274691$vl2.62908 at fe2.news.blueyonder.co.uk>,
John Pote <johnpote at blueyonder.co.uk> wrote:
			.
			.
			.
>The motivation to look at http: is the widespread avaiability of internet 
>connections and standard servers able to run CGI scripts. In particular the 
>availability of low cost GPRS modems (solar panel and/or wind gen) is very 
>attractive for remote locations where there is  no power, telephone line or 
>cable company.
			.
			.
			.
Ah!  I *completely* understand, now.  We actually do some of the
same ...  Now that I have a fuller grasp of your situation, let
me think over the weekend.  I like projects like this.


From bblais at bryant.edu  Sun Feb  5 16:26:25 2006
From: bblais at bryant.edu (Brian Blais)
Date: Sun, 05 Feb 2006 16:26:25 -0500
Subject: Numeric and matlab
Message-ID: <43E66D81.20906@bryant.edu>

Hello,

Most of my experience is with Matlab/Octave, so I am a Python newbie (but enjoying 
it! :)  )

There are a lot of things that I do in Matlab that I'd like to know the proper way to 
do in Python.  Here are a few:

MATLAB:

	% example vectors
	a=1:10;
	b=-5:.1:5;

	% set all the values above 5 equal to 6
	idx=find(a>5);
	a(idx)=6;

	% extract elements

	idx=find(b>0)
	b=b(idx);

	% meshgrid...usually to go through all possibly values of a parameter

	[x,y]=meshgrid(1:10,-5:.1:5)
	x=x(:); y=y(:);
	for i=1:length(x)
	  % do something with x(i) and y(i)
	end


I'm sure there are more, but these jump out at me as I'm going.  It seems as if the 
idx=find() stuff can be done with Numeric.nonzeros(), but you can't index with that, like

a=Numeric.arange(1,11,1)
idx=Numeric.nonzeros(a)
a=a[idx]   % doesn't work

and what about meshgrid?  Do I use the fromfunction() in some way?  Is there a 
resource that goes through comparisons like this?


thanks,


		Brian Blais
-- 
-----------------

             bblais at bryant.edu
             http://web.bryant.edu/~bblais


From aleaxit at yahoo.com  Mon Feb 20 12:12:40 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 20 Feb 2006 09:12:40 -0800
Subject: Quesion about the proper use of __slots__
References: <1140424508.393412.79140@o13g2000cwo.googlegroups.com>
	<43f9825e$0$4777$636a55ce@news.free.fr>
	<1140426860.033363.237150@o13g2000cwo.googlegroups.com>
	<dtc219$h0a$01$1@news.t-online.com>
	<1140428016.170547.315710@g47g2000cwa.googlegroups.com>
	<1140432487.272405.297100@f14g2000cwb.googlegroups.com>
	<1140434225.164304.230440@z14g2000cwz.googlegroups.com>
	<dtca02$pn3$03$2@news.t-online.com>
	<1140438776.231178.205500@g43g2000cwa.googlegroups.com>
Message-ID: <1hb1w3a.184r7nf13isra3N%aleaxit@yahoo.com>

<bonono at gmail.com> wrote:

> Peter Otten wrote:
> > > He could be working on a machine with < 1M RAM or some other
> > > constraints.
> >
> > I have 256K, by the way.
> >
> Impressive, curious to know what kind of environment it is as it has
> been a long time I have seen such limited spec. My first x86(IBM PC)
> had more than that.

I believe some cellphones and similarly limited devices may go as low as
256k, but I don't think anybody's running Python today on any device
with less than a MB (and more likely more).

The first PC _I_ owned had 4K of RAM (the cheaper model only had 1K, but
I splurged for the big one) -- Sinclair ZX80.  But I didn't run Python
on it (indeed I soon swapped it for one with very similar HW but Forth
instead of Basic, called the "Jupiter Ace": Forth's force has always
been the ability to run with incredibly-little memory).


Alex


From mclaugb at nospm.yahoo.com  Mon Feb  6 06:38:51 2006
From: mclaugb at nospm.yahoo.com (mclaugb)
Date: Mon, 6 Feb 2006 11:38:51 -0000
Subject: Scientific Computing with NumPy
References: <ds7bvh$ab1$2@gemini.csx.cam.ac.uk>
	<mailman.1482.1139225595.27775.python-list@python.org>
Message-ID: <ds7ch4$bj7$1@gemini.csx.cam.ac.uk>

This page documents the differences.  It seems that NumPy is supported and 
more recent.
http://numeric.scipy.org/


"linda.s" <samrobertsmith at gmail.com> wrote in message 
news:mailman.1482.1139225595.27775.python-list at python.org...
On 2/6/06, mclaugb <mclaugb at nospm.yahoo.com> wrote:
> Has anyone recompiled the Scientific Computing package using NumPy instead
> of Numeric?
> I need a least squares algorithm and a Newton Rhaphson algorithm which is
> contained in Numeric but all the documentation out there says that Numeric
> is crap and all code should be using NumPy.
> Thanks,
> Bryan
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
what is the relationship between Numeric and Numpy? 




From deets at nospam.web.de  Mon Feb 20 05:37:56 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 20 Feb 2006 11:37:56 +0100
Subject: cElementTree encoding woes
Message-ID: <45tkj3F8d9fpU1@uni-berlin.de>

Hi,

I've got to deal with a pretty huge XML-document, and to do so I use the
cElementTree.iterparse functionality. Working great.

Only trouble: The guys creating that chunk of XML - well, lets just say they
are "encodingly challanged", so they don't produce utf-8, but only cp1252
instead, together with some weird name (Windows-1252) for that. That is not
part of the standard codecs module. cp1252 is, of course.

But that won't work for iterparse. So currently, I manually change the
encoding given to utf-8, and use a stream-recoder. 

However, I was wondering if I could teach cElementTree about that encoding
name. I tried to register cp1252 under the name Windows-1252, but had no
luck - cET won't buy it.

Any suggestions?

Diez


From fuzzyman at gmail.com  Thu Feb  2 04:15:40 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 2 Feb 2006 01:15:40 -0800
Subject: changing python script on-the-fly for ActiveX/COM object
	(win32com)
In-Reply-To: <1138845738.717736.222710@g49g2000cwa.googlegroups.com>
References: <1138845738.717736.222710@g49g2000cwa.googlegroups.com>
Message-ID: <1138871740.436875.83170@g44g2000cwa.googlegroups.com>


jd wrote:
> I have implemented a COM object in Python and I would like
> to be able to change the script without stopping and
> restarting the application that's using the COM object.  Is
> there a way to do this?  (I can change the program that
> calls the COM object if needed.)
>

I have no idea about the intracacies of COM, but...

You'll probably have to at least implement a Python stub that doesn't
change. You can implement everything else in modules.

You can override the modules and call 'reload' to force the newer
versions to be used.

I don't know if that would rebind external references to objects
*within* the module (you'd need to experiment or wait for a more
knowledgeable opinion).

You'd also have to at least *suspend* operations whilst the update
takes place.

All the best,


Fuzzyman
http://www.voidspace.org.uk/python/index.shtml

> Thanks...
> 
> -- jeff



From mlist at fastwebnet.it  Mon Feb 20 03:34:38 2006
From: mlist at fastwebnet.it (billie)
Date: Mon, 20 Feb 2006 09:34:38 +0100
Subject: editor for Python on Linux
References: <dtai6e$23m$2@ariane.blic.net>
	<1140423903.462774.193920@g14g2000cwa.googlegroups.com>
Message-ID: <L8fKf.11481$uQ4.3014@tornado.fastwebnet.it>

I really think that IDLE is one of the best around in Python source editing. 
The only great lacks are tabs. Does somebody know if is there some IDLE 
modified version including tabbed browsing, out there? 




From pprobert at wisc.edu  Fri Feb 24 17:17:49 2006
From: pprobert at wisc.edu (Paul Probert)
Date: Fri, 24 Feb 2006 16:17:49 -0600
Subject: Problem solved: Re: time.sleep(1) sometimes runs for 200 seconds
	under windows
In-Reply-To: <dtl9ad$35h$1@sea.gmane.org>
References: <dtl9ad$35h$1@sea.gmane.org>
Message-ID: <dto0mf$gp0$1@sea.gmane.org>

Thanks everyone for your help.
   It was the "Abouttime.exe" program, a time synch utility. To get the 
problem, you have to run it as a service, and possibly it has to have 
trouble connecting to its time servers. It would cause time.sleep(1) to 
sometimes block for 200 seconds. Not "about" 200 seconds but always 
within 199 to 202 seconds. Very strange, but it is good to have the 
problem gone.

Enjoy the weekend!

Paul Probert
University of Wisconsin



From dschuff at purdue.edu  Wed Feb 22 11:44:22 2006
From: dschuff at purdue.edu (Derek Schuff)
Date: Wed, 22 Feb 2006 11:44:22 -0500
Subject: except clause not catching IndexError
Message-ID: <dti4d8$lmn$1@mailhub227.itcs.purdue.edu>

I'm sorry if this is a FAQ or on an easily-accesible "RTFM" style page, but
i couldnt find it.

I have some code like this:
        for line in f:
                toks = line.split()
                try:
                    if int(toks[2],16) == qaddrs[i]+0x1000 and toks[0] == "200": #producer
write
                        prod = int(toks[3], 16)
                    elif int(toks[2],16) == qaddrs[i]+0x1002 and toks[0] == "200":
#consumer write
                        cons = int(toks[3], 16)
                    else:
                        continue
                except IndexError: #happens if theres a partial line at the end of file
                    print "indexerror"
                    break

However, when I run it, it seems that I'm not catching the IndexError:
Traceback (most recent call last):
  File "/home/dschuff/bin/speeds.py", line 202, in ?
    if int(toks[2],16) == qaddrs[i]+0x1000 and toks[0] == "200": #producer
write
IndexError: list index out of range

If i change the except IndexError to except Exception, it will catch it (but
i believe it's still an IndexError).
this is python 2.3 on Debian sarge.

any ideas?

thanks, 
-derek
 
  


From none at no.chance  Fri Feb 17 05:49:56 2006
From: none at no.chance (Peter Tillotson)
Date: Fri, 17 Feb 2006 10:49:56 +0000
Subject: Python advocacy in scientific computation
In-Reply-To: <1139937227.379829.215090@z14g2000cwz.googlegroups.com>
References: <1139937227.379829.215090@z14g2000cwz.googlegroups.com>
Message-ID: <dt49ol$j40$1@hermes.shef.ac.uk>

Hi,

Like it - an area that doesn't come out strongly enough for me is 
Python's ability to drop down to and integrate with low level 
algorithms. This allows me to to optimise the key bits of design in 
python very quickly and then if I still need more poke i can drop down 
to low level programming languages. Optimise design, not code unless I 
really need to.

To be fair the same is at least partly true for Java ( though supporting 
JNI code scares me ) but my prototyping productivity isn't as high.

The distributed / HPC packages may also be worth noting - PyMPI and 
PyGlobus.

p

Michael Tobis wrote:
> Someone asked me to write a brief essay regarding the value-add
> proposition for Python in the Fortran community. Slightly modified to
> remove a few climatology-related specifics, here it is.
> 
> I would welcome comments and corrections, and would be happy to
> contribute some version of this to the Python website if it is of
> interest.
> 
> ===
> 
> The established use of Fortran in continuum models such as climate
> models has some benefits, including very high performance and
> flexibility in dealing with regular arrays, backward compatibility with
> the existing code base, and the familiarity with the language among the
> modeling community. Fortran 90 and later versions have taken many of
> the lessons of object oriented programming and adapted them so that
> logical separation of modules is supported, allowing for more effective
> development of large systems. However, there are many purposes to which
> Fortran is ill-suited which are increasingly part of the modeling
> environment.
> 
> These include: source and version control and audit trails for runs,
> build system management, test specification, deployment testing (across
> multiple platforms), post-processing analysis, run-time and
> asynchronous visualization, distributed control and ensemble
> management. To achieve these goals, a combination of shell scripts,
> specialized build tools, specialized applications written in several
> object-oriented languages, and various web and network deployment
> strategies have been deployed in an ad hoc manner. Not only has much
> duplication of effort occurred, a great deal of struggling up the
> learning curves of various technologies has been required as one need
> or another has been addressed in various ad hoc ways.
> 
> A new need arises as the ambitions of physical modeling increase; this
> is the rapid prototyping and testing of new model components. As the
> number of possible configurations of a model increases, the expense and
> difficulty of both unit testing and integration testing becomes more
> demanding.
> 
> Fortunately, there is Python. Python is a very flexible language that
> has captured the enthusiasm of commercial and scientific programmers
> alike. The perception of Python programmers coming from almost any
> other language is that they are suddenly dramatically several times
> more productive than previously, in terms of functionality delivered
> per unit of programmer time.
> 
> One slogan of the Python community is that the language "fits your
> brain". Why this might be the case is an interesting question. There
> are no startling computer science breakthroughs original to the
> language, Rather, Python afficionados will claim that the language
> combines the best features of such various languages as Lisp, Perl,
> Java, and Matlab. Eschewing allegiance to a specific theory of how to
> program, Python's design instead offers the best practices from many
> other software cultures.
> 
> The synergies among these programming modes is in some ways harder  to
> explain than to experience. The Python novice may nevertheless observe
> that a single language can take the place of shell scripts, makefiles,
> desktop computation environments, compiled languages to build GUIs, and
> scripting languages to build web interfaces. In addition,  Python is
> useful as a wrapper for Fortran modules, facilitating the
> implementation of true test-driven design processes in Fortran models.
> 
> Another Python advocacy slogan is "batteries included". The point here
> is that (in part because Python is dramatically easier to write than
> other languages) there is a very broad range of very powerful standard
> libraries that make many tasks which are difficult in other languages
> astonishingly easy in Python. For instance, drawing upon the standard
> libraries (no additional download required)  a portable webserver
> (runnable on both Microsoft and Unix-based platforms) can be
> implemented in seven lines of code. (See
> http://effbot.org/librarybook/simplehttpserver.htm ) Installation of
> pure python packages is also very easy, and installation of mixed
> language products with a Python component is generally not
> significantly harder than a comparable product with no Python
> component.
> 
> Among the Python components and Python bindings of special interest to
> scientists are the elegant and powerful matplotlib plotting package,
> which began by emulating and now surpasses the plotting features of
> Matlab, SWIG, which allows for runtime interoperability with various
> languages, f2py which specifically interoperates with Fortran, NetCDF
> libraries (which cope with NetCDF files with dramatically less fuss
> than the standard C or Fortran bindings), statistics packages including
> bindings to the R language,  linear algebra packages,  various
> platform-specific and portable GUI libraries, genetic algorithms,
> optimization libraries, and bindings for high performance differential
> equation solvers (notably, using the Argonne National Laboratory
> package PetSC). An especially interesting Python trick for runtime
> visualization in models that were not designed to support it, pioneered
> by David Beazley's SWILL, embeds a web server in your model code.
> 
> See especially http://starship.python.net/~hinsen/ScientificPython/ and
> http://scipy.org as good starting points to learn about scientific uses
> of Python.
> 
> mt
> 


From grante at visi.com  Tue Feb 28 15:42:46 2006
From: grante at visi.com (Grant Edwards)
Date: Tue, 28 Feb 2006 20:42:46 -0000
Subject: Thread Question
References: <1141155072.500444.215130@v46g2000cwv.googlegroups.com>
	<1209cbiq1kjbh06@corp.supernews.com>
	<mailman.2529.1141158855.27775.python-list@python.org>
Message-ID: <1209de6pu05iuc5@corp.supernews.com>

On 2006-02-28, Felipe Almeida Lessa <felipe.lessa at gmail.com> wrote:

> # He meant calling direct vs. subclassing. In your example you called
>   the Thread class directly, but you could have subclassed it.

Yup.  I should have realized that.

> # In your case, Edwards, I'd prefer subclassing because then you could
> put some states in the class. A (bad) example:

[...]

Good example.

It's probably bad style, but in my programs the "state info"
like that usually ends up being global variables since it's
also "attached" to thinks like GUI buttons and indicators.  I
never have more than one instance of the thread, so I can get
away with it.  If you need multiple instances of stateful
threads, you really do want to subclass Thread.

-- 
Grant Edwards                   grante             Yow!  I'm in DISGUISE as a
                                  at               BAGGAGE CHECKER....I can
                               visi.com            watch the house, if it's
                                                   ORANGE...


From scott.daniels at acm.org  Fri Feb 24 11:33:58 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Fri, 24 Feb 2006 08:33:58 -0800
Subject: chrtohex
In-Reply-To: <1140794594.653270.242720@e56g2000cwe.googlegroups.com>
References: <1140794594.653270.242720@e56g2000cwe.googlegroups.com>
Message-ID: <43ff33ce$1@nntp0.pdx.net>

luca72 wrote:
> Hello again my friends
> 
> here's my new problem.
> 
> How i can translate chr in to hex or int to integer value?
> 
> Best Regards
> 
> Luca
> 
By demonstrating that you have tried to solve the problem yourself.
See:
         http://www.catb.org/~esr/faqs/smart-questions.html

--Scott David Daniels
scott.daniels at acm.org


From mikeisgreat at gmail.com  Thu Feb  2 13:47:42 2006
From: mikeisgreat at gmail.com (mikeisgreat at gmail.com)
Date: 2 Feb 2006 10:47:42 -0800
Subject: learning python, using string help
Message-ID: <1138906062.727850.177960@g14g2000cwa.googlegroups.com>

hi all,

I have a simple snippet I am trying to keep the format the same as
plain text, though I want to embed it in html ...

basically,

print "Content-type:text/plain\n\n";
getrup = os.popen('ruptime').read()
print getrup

is the same format as if I ran 'ruptime' from the command line.

If I use...

print "Content-type:text/html\n\n";
getrup = os.popen('ruptime').read()
print getrup

I can just split the lines and loop through it ... but I am not sure
how to keep the tab spacing the same
I'm sure its something so simple I am missing ....

thanks for helping someone learning..
--mike



From johnjsal at NOSPAMgmail.com  Fri Feb 10 15:43:15 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 10 Feb 2006 20:43:15 GMT
Subject: installing python on a server?
In-Reply-To: <hntpu1pmctfaa61ns32k539nisvvljd96n@4ax.com>
References: <PB6Hf.1596$No6.37972@news.tufts.edu>
	<hntpu1pmctfaa61ns32k539nisvvljd96n@4ax.com>
Message-ID: <DV6Hf.1597$No6.37987@news.tufts.edu>

Rene Pijlman wrote:
> John Salerno:
>> Can anyone tell me how complicated it might be to install Python on my 
>> server so I can use it for web apps?
> 
> 2 on a scale from 1 to 10.
> 
>> Is it a one-time process, or something to maintain?
> 
> Both :-)
> 
> I installed Python 2.2 - 2.4 from source on Linux with no problem
> whatsoever. I now plan about 5 minutes installation time per new release,
> that's 2 minutes to make coffee, 2 minutes to skim the release notes and
> README and 1 minute to watch ./configure; make; make install do it's
> magic.
> 
> There are some details to watch out for, such as having the required
> libraries and include files around before installation, to enable specific
> functionality (e.g. SSL support in socket). But that's no big deal.
> 

Hmm, sounds easy, yet I don't know where to start. What do I actually 
use to install it onto the server? I've never dealt with server stuff 
before, so I might not be familiar with the terminology.


From eoinrogers at gmail.com  Fri Feb 17 15:02:02 2006
From: eoinrogers at gmail.com (Byte)
Date: 17 Feb 2006 12:02:02 -0800
Subject: Another stupid newbie question
In-Reply-To: <mailman.2065.1140204717.27775.python-list@python.org>
References: <1140203709.145048.314180@g43g2000cwa.googlegroups.com>
	<mailman.2065.1140204717.27775.python-list@python.org>
Message-ID: <1140205198.880333.210960@f14g2000cwb.googlegroups.com>

Great, thanks all (the point of x = 2 was that i dont understand
exactly what True is on while True:)

 -- /usr/bin/byte



From grflanagan at yahoo.co.uk  Thu Feb 16 16:19:24 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 16 Feb 2006 13:19:24 -0800
Subject: Merging two lists of data (Pythonic way)
References: <8k5Jf.27896$sA3.57@fed1read02>
	<1140122391.823206.74580@g14g2000cwa.googlegroups.com>
	<qD5Jf.27899$sA3.5853@fed1read02>
	<5iq9v11peim9ehamh39v2fcilq3ndq1s52@4ax.com>
Message-ID: <1140124764.380238.146800@f14g2000cwb.googlegroups.com>

Dave Hansen wrote:
> On Thu, 16 Feb 2006 12:51:24 -0800 in comp.lang.python, "SMB"
> <sean at buildingonline.com> wrote:
>
> >
> >"Jonathan Gardner" <jgardner at jonathangardner.net> wrote in message
> >news:1140122391.823206.74580 at g14g2000cwa.googlegroups.com...
> >> codes = map(lambda x: x[0], list1)
> >> for d in list2:
> >>  if d['code'] in codes:
> >>    d['VERIFIED'] = 1
> >>
> >> Is this what you were looking for?
> >>
> >
> >That is exactly what I was looking for.  I will have to take a look at map.
>
> You might also look at list comprehensions.  Replacing the first line
> in the above with
>
>    codes = [x[0] for x in list1]
>
> should yield the same result.
>
> Regards,
>                                         -=Dave
>
> --
> Change is inevitable, progress is not.


What about :

A = [ a[0] for a in LIST1 ]
for d in [ d for d in LIST2 if d['code'] in A ]:
    d['VERIFIED'] = 1

?

Gerard



From sambyerly at netscape.net  Fri Feb 17 15:27:52 2006
From: sambyerly at netscape.net (nick)
Date: 17 Feb 2006 12:27:52 -0800
Subject: Click this link, scroll to the bottom, and get your own free mall!!
Message-ID: <1140208072.846039.111450@g47g2000cwa.googlegroups.com>

http://www.telebay.com/esolutions/mall.html



From codecraig at gmail.com  Fri Feb 10 08:51:58 2006
From: codecraig at gmail.com (py)
Date: 10 Feb 2006 05:51:58 -0800
Subject: Create dict from two lists
Message-ID: <1139579518.129742.265680@o13g2000cwo.googlegroups.com>

I have two lists which I want to use to create a dictionary.  List x
would be the keys, and list y is the values.

x = [1,2,3,4,5]
y = ['a','b','c','d','e']

Any suggestions?  looking for an efficent simple way to do this...maybe
i am just having a brain fart...i feel like this is quit simple.

thanks.



From szabolcs.berecz at gmail.com  Thu Feb 16 11:04:43 2006
From: szabolcs.berecz at gmail.com (szabi)
Date: 16 Feb 2006 08:04:43 -0800
Subject: pythonic way of 'b = list(a); b.append(4)"
Message-ID: <1140105883.069632.262530@g43g2000cwa.googlegroups.com>

Hi!

I have a list of three values and want to call a function with four
parameters. I would like
to write something like:

a = [1, 2, 3]
f(*a, 4)

This is syntactically wrong, so is there a function which appends a
value to a list and
returns the new value, so that I could write something like this:

f(list(a).functional_append(4))

I can't modify 'a'.

Thanks,
Szabi



From claes_lillieskold at hotmail.com  Mon Feb 27 15:05:55 2006
From: claes_lillieskold at hotmail.com (claes_lillieskold at hotmail.com)
Date: 27 Feb 2006 12:05:55 -0800
Subject: PDB on a large threaded application (QMTest)
Message-ID: <1141070755.231208.325620@i39g2000cwa.googlegroups.com>

Hi,
I'm trying to debug QMTest from Code Sourcery with PDB from inside
Emacs.
My problem is that without PDB, I have no problem, but when I'm using
PDB,
I get exceptions thrown.

Has anyone else tried using PDB on QMTest?
My python is 2.2, and QMTest is 2.0.3.

Thanks / Claes



From felipe.lessa at gmail.com  Sat Feb 18 12:01:12 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sat, 18 Feb 2006 15:01:12 -0200
Subject: share function argument between subsequent calls but not
	between class instances!
In-Reply-To: <Xns976EAB5E52818duncanbooth@127.0.0.1>
References: <11vejkega5tbrc5@corp.supernews.com>
	<Xns976EAB5E52818duncanbooth@127.0.0.1>
Message-ID: <1140282072.11250.6.camel@kenshin>

Em S?b, 2006-02-18 ?s 16:50 +0000, Duncan Booth escreveu:
> marker = object()
> 
> class Test(object):
>     def __init__(self):
>         self.L = []
> 
>     def f(self,a, L=marker):
>         if L is marker:
>             L = self.L
>         L.append(a)
>         return L 

As hasattr(None, "append") == False, you could also do:

class Test(object):
    def __init__(self):
        self.L = []

    def f(self, a, L=None):
        if L is None:
            L = self.L
        L.append(a)
        return L

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From steve at REMOVETHIScyber.com.au  Fri Feb 10 19:12:47 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sat, 11 Feb 2006 11:12:47 +1100
Subject: cmd
References: <ec9qu1t7ij7rfpr6m26urjt7smt746m22t@4ax.com>
Message-ID: <pan.2006.02.11.00.12.47.87641@REMOVETHIScyber.com.au>

On Sat, 11 Feb 2006 00:47:14 +0100, Gerber wrote:

> I'd like some documentation on the cmd module, besides the regular
> docs, in help() and docs.python.org...

Is this a trick question? You'd like some documentation apart from the
documentation?

Have you tried reading the source code to the module? Have you tried
googling? Have you tried using Python's extensive introspection
capabilities on the module?

Failing that, do you have a specific question you would like to ask?


-- 
Steven.



From grahn+nntp at snipabacken.dyndns.org  Mon Feb  6 17:46:17 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 6 Feb 2006 22:46:17 GMT
Subject: Best way of finding terminal width/height?
References: <96nFf.43896$d5.199922@newsb.telia.net>
	<11uc3dohfitotc5@corp.supernews.com>
	<jysFf.155352$dP1.513537@newsc.telia.net>
	<11udc0r2bq11042@corp.supernews.com> <43E719EE.3040401@gmail.com>
	<11ueq4nhn91qm91@corp.supernews.com>
Message-ID: <slrndufkd1.2t1.grahn+nntp@frailea.sa.invalid>

On Mon, 06 Feb 2006 15:17:43 -0000, Grant Edwards <grante at visi.com> wrote:
> On 2006-02-06, Joel Hedlund <joel.hedlund at gmail.com> wrote:

[finding the terminal dimensions]

>> access to the termios module either. So, in the latter case
>> I'm back to square one, which is arbitrary guesswork.
>
> Yes, that's probably true.  In that case, most people assume
> 80x24.

And, I might add, as a Unix user that is what I expect programmers to do --
stick to 80x24 or 80 x any-height-they-need. If it's not a full-screen
program (which would use curses anyway), I don't expect them to work harder
than that.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From tjreedy at udel.edu  Mon Feb 27 19:22:52 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 27 Feb 2006 19:22:52 -0500
Subject: str.count is slow
References: <1141073696.107136.318600@j33g2000cwa.googlegroups.com>
	<1141083127.970403.147100@v46g2000cwv.googlegroups.com>
Message-ID: <du054s$6j9$1@sea.gmane.org>


"Ben Cartwright" <bencvt at gmail.com> wrote in message 
news:1141083127.970403.147100 at v46g2000cwv.googlegroups.com...
> Your evidence points to some unoptimized code in the underlying C
> implementation of Python.  As such, this should probably go to the
> python-dev list (http://mail.python.org/mailman/listinfo/python-dev).
>
> The problem is that the C library function memcmp is slow, and
> str.count calls it frequently.  See lines 2165+ in stringobject.c
> (inside function string_count):
>
> r = 0;
> while (i < m) {
> if (!memcmp(s+i, sub, n)) {
> r++;
> i += n;
> } else {
> i++;
> }
> }
>
> This could be optimized as:
>
> r = 0;
> while (i < m) {
> if (s[i] == *sub && !memcmp(s+i, sub, n)) {
> r++;
> i += n;
> } else {
> i++;
> }
> }
>
> This tactic typically avoids most (sometimes all) of the calls to
> memcmp.  Other string search functions, including unicode.count,
> unicode.index, and str.index, use this tactic, which is why you see
> unicode.count performing better than str.count.

If not doing the same in str.count is indeed an oversight.  a patch should 
be welcome (on the SF tracker). 





From rphillips at engineer.co.summit.oh.us  Wed Feb 15 06:47:36 2006
From: rphillips at engineer.co.summit.oh.us (paron)
Date: 15 Feb 2006 03:47:36 -0800
Subject: Embedding an Application in a Web browser
References: <1139930045.408507.151440@g43g2000cwa.googlegroups.com>
Message-ID: <1140004056.893486.291280@g44g2000cwa.googlegroups.com>

You may already know this, but I don't think anyone has mentioned it
explicitly.

You can run a Python web server (I like CherryPy) on the local machine,
and serve pages to "localhost." Everything else is just plain old
Python, and talking to the OS is no problem.

Ron



From tzot at sil-tec.gr  Tue Feb 14 02:50:41 2006
From: tzot at sil-tec.gr (Christos Georgiou)
Date: Tue, 14 Feb 2006 09:50:41 +0200
Subject: OT: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<dscq68$ejc$1@news.al.sw.ericsson.se>
	<CdadnavYLe_sbHTeRVn-ow@comcast.com>
	<dsf2da$lmr$1@news.al.sw.ericsson.se>
Message-ID: <mt62v1lqfqm43afg9m5m5kpu744cgb7u6o@4ax.com>

On Thu, 9 Feb 2006 10:35:37 +0100, rumours say that "Frithiof Andreas
Jensen" <frithiof.jensen at die_spammer_die.ericsson.com> might have written:

>If one was trying to detect fanatics of any creed, a certain indicator would
>be that they have absolutely no sense of humour - they suffer from a
>yet-to-be-described variant of autism I.M.O.

Although I generally agree, I've seen images of fanatics laughing madly when
they employ their fanatism; so they might have some sense of humour, even if
a perverted one (perverted relative to your or my sense of humour, obviously
:)  They tend to lack self-sarcasm, though.

Anyway, someone wiser than me (probably so much wiser that I subconsciously
forgot their name!) said: "The difference between a saint and a fanatic is
that the saint fights the evil inside him/herself..."
-- 
TZOTZIOY, I speak England very best.
"Dear Paul,
please stop spamming us."
The Corinthians


From rridge at csclub.uwaterloo.ca  Sun Feb 26 12:46:16 2006
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 26 Feb 2006 09:46:16 -0800
Subject: Pure python implementation of string-like class
References: <20060225.102645.74687871.kayama@st.rim.or.jp>
	<mailman.2433.1140880297.27775.python-list@python.org>
	<1140891600.822510.189140@v46g2000cwv.googlegroups.com>
	<dtqd37$2he$1@apollon.grec.isp.9tel.net>
	<1140915354.024788.25720@z34g2000cwc.googlegroups.com>
	<dts5tc$9d$1@apollon.grec.isp.9tel.net>
Message-ID: <1140975976.471949.20940@t39g2000cwt.googlegroups.com>

Ross Ridge wrote:
> Akihiro Kayama in his original post made it clear that he wanted to use
> a character set larger than entire Unicode code space.

Xavier Morel wrote:
> He implies that ...

He explictly said that character set he wanted to use wouldn't fit in
UTF-16.

>... but in later messages he
> 1. Implies that he wants to use the Unicode private spaces, which are in
> the Unicode code space

He explictly said that he wanted to use the  "U+60000000...U+7FFFFFFF"
range which is outside of the Unicode code space, despite him
mistakenly calling them Unicode characters.

> 2. Says explicitly that  his needs concern Kanji encoding...

I have no clue whether he really needs such a large character set, but
if he does then it makes sense for him to want to use an encoding
that's wider than UTF-16.

As for the problem he actually posed, I'd suggest using tuples rather
than lists, since tuples are immutable like strings.  That would make
it easier for the class to be used as key in a dictionary.  Hmm...
thiking about it, it might actually make sense to use strings as the
internal representation as a lot operations can be implemented by using
the standard string operation but multipling the offsets and lengths by
4.

                           Ross Ridge



From robert.kern at gmail.com  Wed Feb 15 19:05:58 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 15 Feb 2006 18:05:58 -0600
Subject: Scientific Computing with NumPy
In-Reply-To: <1140047987.435267.194220@g43g2000cwa.googlegroups.com>
References: <ds7bvh$ab1$2@gemini.csx.cam.ac.uk>	<mailman.1482.1139225595.27775.python-list@python.org>	<ds7ch4$bj7$1@gemini.csx.cam.ac.uk>	<1d987df30602100415o16ad3d02n71aca12686667ff@mail.gmail.com>	<mailman.1739.1139656835.27775.python-list@python.org>
	<1140047987.435267.194220@g43g2000cwa.googlegroups.com>
Message-ID: <dt0fl6$ehg$1@sea.gmane.org>

Tariq wrote:
> Has anyone been able to successfully install numpy 0.9.4 on python 2.4
> under cygwin?
> 
> I'm getting a few errors, especially while it installs the C source.

I don't know of anyone compiling numpy under cygwin, but we will be happy to
help you on numpy-discussion at lists.sourceforge.net if you will give us some more
information like what arguments you gave to the setup script and the exact error
messages that you are seeing.

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From pparkkin at gmail.com  Wed Feb  8 08:57:48 2006
From: pparkkin at gmail.com (enjoying the view)
Date: 8 Feb 2006 05:57:48 -0800
Subject: a question regarding call-by-reference
In-Reply-To: <1139250105.744691.110440@o13g2000cwo.googlegroups.com>
References: <1139250105.744691.110440@o13g2000cwo.googlegroups.com>
Message-ID: <1139407068.309448.7450@z14g2000cwz.googlegroups.com>

Thank you everyone for your helpful replies!

I think the problems that arise with nested and overly large lists and
dictionaries, and difficulties of handling other mutable datatypes will
make my little assignment just too difficult. I'll just specify that
call-by-reference isn't supported and leave it at that.

Between floors. Going down.
Enjoying the view.



From steven.bethard at gmail.com  Wed Feb 15 23:14:56 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 15 Feb 2006 21:14:56 -0700
Subject: Safe Python Execution
In-Reply-To: <1140058830.477028.26620@f14g2000cwb.googlegroups.com>
References: <1140058830.477028.26620@f14g2000cwb.googlegroups.com>
Message-ID: <jqadnc-t6NyiYW7enZ2dnUVZ_tudnZ2d@comcast.com>

Graham wrote:
> The way i'm controlling functionality is with some games and exec, so
> if 'code' was the text code you wanted to execute i run:
> 
> exec code in {'__builtins__':None"}
> 
> obviously this doesn't give you much to play with, but it does remove
> file access and importing as far as i can tell. Can anyone think of a
> hack around this? I assume if it was this easy it would be a module
> already but i figured i would ask.

Search the newsgroups, but one of the major problems is that all 
subclasses of object are available through object.__subclasses__():

 >>> (1).__class__.__bases__[0].__subclasses__()
[<type 'type'>, <type 'weakref'>, <type 'int'>, <type 'basestring'>,
...
<type 'dictproxy'>, <type 'code'>, <type 'frame'>]

Note that this also includes any classes you define that are subclasses 
of object:

 >>> class C(object):
...     dont_change_this = 42
...
 >>> exec '''\
... subclasses = (1).__class__.__bases__[0].__subclasses__()
... C, = [cls for cls in subclasses if cls.__name__ == 'C']
... C.dont_change_this = 'bwahahaha'
... ''' in {'__builtins__':None}
 >>> C.dont_change_this
'bwahahaha'

So if you're really concerned about your objects being manipulated with 
users, the ``exec code in {'__builtins__':None}`` technique is not going 
to help you out.  However, the code will be executed in restricted mode, 
so things like the file constructor won't work.  Not sure if that's 
enough for you...

STeVe


From peter at engcorp.com  Fri Feb  3 18:00:16 2006
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 03 Feb 2006 18:00:16 -0500
Subject: web.py + cheetah delivering incomplete pages
In-Reply-To: <1139001423.549772.325090@f14g2000cwb.googlegroups.com>
References: <1138977432.206287.16130@g47g2000cwa.googlegroups.com>	<1138988779.571240.209970@g43g2000cwa.googlegroups.com>
	<1139001423.549772.325090@f14g2000cwb.googlegroups.com>
Message-ID: <ds0n9q$nme$1@sea.gmane.org>

wolfgang.lipp at gmail.com wrote:
> yeah, posted it there too, but, you see, there are but 95 members in
> that group -- guess it's more productive to ask this right here. we'll
> see.

There's a good chance that about 80 of those 95 people read this 
newsgroup regularly, and that this newsgroup has only a small handful of 
people who know anything about web.py but who aren't in that set of 
95... and some of them might not notice your posting.

But, as you said, we'll see. ;-)

-Peter



From sybrenUSE at YOURthirdtower.com.imagination  Fri Feb 24 05:16:25 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Fri, 24 Feb 2006 11:16:25 +0100
Subject: How to send an email with non-ascii characters in Python
References: <1140775736.341876.314070@t39g2000cwt.googlegroups.com>
Message-ID: <slrndvtn7p.e6o.sybrenUSE@schuimige.unrealtower.org>

Lad enlightened us with:
> Can anyone give an example how to send email with non-ascii
> characters( both in subject and body).  I would like to use
> windows-1250 code page

I'd use Latin-1 or UTF-8, since they are both cross-platform instead
of windows-specific...

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From nyamatongwe+thunder at gmail.com  Fri Feb 17 22:14:49 2006
From: nyamatongwe+thunder at gmail.com (Neil Hodgson)
Date: Sat, 18 Feb 2006 03:14:49 GMT
Subject: commenting out blocks of code
In-Reply-To: <pan.2006.02.18.01.36.05.856023@REMOVETHIScyber.com.au>
References: <20060217231846.87613.qmail@web36708.mail.mud.yahoo.com>
	<mailman.2077.1140221554.27775.python-list@python.org>
	<pan.2006.02.18.01.36.05.856023@REMOVETHIScyber.com.au>
Message-ID: <JiwJf.10683$yK1.3804@news-server.bigpond.net.au>

    Hi Steven,

> I see the developers of Scite are either newbies to GUI programming, or
> they operate in a world of their own. Ctrl-Q is reserved for Quit (or
> Exit) in every GUI API I know of.

    I am the developer responsible for SciTE and the Ctrl+Q decision.
Ctrl+Q is not reserved for Quit on every platform. Perhaps you have
never used Windows where Exit does not normally have a distinct command 
key of its own but can be performed with Alt+F4 (Close) for single 
window applications. Since exiting an application is a far less common 
action than modifying the data within that application, it doesn't 
deserve one of the more easily typed key bindings. Some applications use 
Ctrl+Q but, of the applications I currently have open, Firefox, Internet 
Explorer, Explorer, iTunes, Visual Studio .NET, WordPad, QuickTime, 
PythonWin, and WinMerge don't respond to Ctrl+Q by quitting and 
Thunderbird does.
    Windows guidelines:
http://msdn.microsoft.com/library/en-us/dnwue/html/appxB.asp

> It is *easy* to detect when a line is already commented. It starts with a
> #. The ~ is superfluous.

    It is not usual to change a line from being code to being a comment 
as most lines of code make no sense as English text. If you do sometimes 
want to do this, the "#" key can be pressed at the beginning of a line. 
Ctrl+Q exists to allow commenting out sections of code that you do not 
want to be active. The "~" acts to differentiate these different uses of 
one language feature and makes it easy to apply the operation over
ranges that include comments and then invert the operation.

> Commenting and uncommenting should be two different commands: the whole
> point of nested comments is that it allows you to comment a block of text
> which may already contain comments. Having one command do both commenting
> and uncommenting according to the presence or absence of semantic clues in
> the text is a recipe for failure ("No you stupid computer, I want to
> COMMENT that block, not uncomment it!!!").

    Comments and commented out code are distinct. Using the same marker
for both is ambiguous. Few languages support true nested comments.

    SciTE's implementation of Ctrl+Q is very popular although you can 
change the text inserted/removed from "#~" to "#" if you prefer and 
SciTE also includes a command to add stream style comments for languages 
like /* C++ */.

> Imagine if your text editor used cntl-C for both copy and paste, somehow
> guessing whether you wanted to copy selected text or paste over it
> according to some subtle clue in the text itself. Wouldn't that be fun?

    Your imaginary command makes no sense as it is described. What are 
its full semantics? Why was it implemented this way?

    BTW, I have been implementing GUIs for over 20 years so maybe me and
the other SciTE users are in our own world. It does feel like a
friendly, enjoyable, comfortable world, though.

    Neil


From malvert at telenet.be  Wed Feb  8 14:02:33 2006
From: malvert at telenet.be (malv)
Date: 8 Feb 2006 11:02:33 -0800
Subject: Dual Core outlook
In-Reply-To: <Pine.LNX.4.62.0602071944020.4501@urchin.earth.li>
References: <1139329268.695421.191340@g47g2000cwa.googlegroups.com>
	<dsajpk$c26$1@aphrodite.grec.isp.9tel.net>
	<1139335428.970958.170320@o13g2000cwo.googlegroups.com>
	<Pine.LNX.4.62.0602071944020.4501@urchin.earth.li>
Message-ID: <1139421972.144837.51610@f14g2000cwb.googlegroups.com>

Hi All,
Thank you for your commentaries.
In the meantime, I read up in Python-Dev and came across a post by
Johnatan LaCour which kind of nicely sums up the state of affairs:
"Its really a shame.  There seems to be some consensus about
multi-processing, but not a whole lot of interest in making it easier
out of the box.  When it comes to multi-processing, batteries really
_aren't_ included.  Sure, you have lead dioxide and some sulphuric
acid, but you have to put them together to make your battery.  This
isn't the end of the world, but I find it tedious, and I am sure it
confuses and frustrates people new to Python."
Possibly things are not much brighter for other languages.

I'll keep on trying
malv



From erniedude at gmail.com  Wed Feb  1 09:57:14 2006
From: erniedude at gmail.com (Ernesto)
Date: 1 Feb 2006 06:57:14 -0800
Subject: Capture Windows command line output - put in text file
Message-ID: <1138805834.790265.93130@g44g2000cwa.googlegroups.com>

I'm looking for a way to capture command line output from a cmd
session.  Is there a way to use python to launch the application from
the beggining....   then stream all of the output to a text file ?



From lycka at carmen.se  Fri Feb 24 04:01:19 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 24 Feb 2006 10:01:19 +0100
Subject: why don't many test frameworks support file-output?
In-Reply-To: <mailman.2333.1140677874.27775.python-list@python.org>
References: <mailman.2333.1140677874.27775.python-list@python.org>
Message-ID: <dtmi0v$4t4$2@wake.carmen.se>

kanchy kang wrote:
> i browsed the following frameworks briefly: nose, OOBTest,
> testosterone,  py.test, Sancho ... and found out they do support 
> imediate screen-output only.

Look at TextTest.


From samslists at gmail.com  Mon Feb 20 22:05:47 2006
From: samslists at gmail.com (samslists at gmail.com)
Date: 20 Feb 2006 19:05:47 -0800
Subject: Writing my own typing monitor program for RSI sufferers...
Message-ID: <1140491147.433293.164700@g43g2000cwa.googlegroups.com>

Hi...

I want to write a program that will let me know after thirty minutes of
typing that I need to take a five minute typing break.  But when I stop
typing it's smart enough to pause the 30 minute timer automatically.
This is under the X-Window System (Linux).

The tricky part is obviously knowing when the mouse and keyboard are
being used....especially when my application doesn't have the focus.

Obviously I can't do this with just the base python install.  Is there
an add on library that I can use to monitor the keyboard and mouse?
Which is it?  Maybe one of the graphical libraries, like wx, or qt, or
gtk?  Which functions do I need?

Thanks



From thierry.t.chevalier at gmail.com  Tue Feb 28 10:38:36 2006
From: thierry.t.chevalier at gmail.com (tooper)
Date: 28 Feb 2006 07:38:36 -0800
Subject: Python advocacy in scientific computation
In-Reply-To: <1139937227.379829.215090@z14g2000cwz.googlegroups.com>
References: <1139937227.379829.215090@z14g2000cwz.googlegroups.com>
Message-ID: <1141141116.113568.257280@e56g2000cwe.googlegroups.com>

Maybe I'd also emphasize the nice COM interface that allow your wrapped
Fortran to be made available in your Excel macros in a snap. It happens
that Fortran programmers/users tends to be poor Office users except for
Excel which they master at unbelievable level...
My own best low work/high user satisfaction ever is just this, wrap
LOWTRAN call to make is usable from Excel, a 1/2h work and a 100+ users
2 days later !



From ptmcg at austin.rr._bogus_.com  Wed Feb 22 11:14:31 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Wed, 22 Feb 2006 16:14:31 GMT
Subject: Basic coin flipper program - logical error help
References: <1140567243.251982.255620@g14g2000cwa.googlegroups.com>
	<UoOKf.49379$id5.43228@bgtnsc04-news.ops.worldnet.att.net>
	<oOadnVkfiM7aWmbeRVn-vw@comcast.com>
	<1140578858.586591.243900@g43g2000cwa.googlegroups.com>
	<yURKf.22750$UN2.3873@tornado.texas.rr.com>
Message-ID: <H50Lf.26002$Ob5.11871@tornado.texas.rr.com>


"Paul McGuire" <ptmcg at austin.rr._bogus_.com> wrote in message
news:yURKf.22750$UN2.3873 at tornado.texas.rr.com...
> <bonono at gmail.com> wrote in message
> news:1140578858.586591.243900 at g43g2000cwa.googlegroups.com...

> sort, then groupby.
>
>
> import itertools
> import random
> h,t = [len(list(g)) for k,g in
itertools.groupby(sorted([random.randrange(2)
> for i in xrange(100)]))]
> print h,t
>
>
By the way, sort + groupby generalizes beyond just coin-flipping.  Here is a
modified version that simulates die rolls.

-- Paul

import itertools
import random

NUM_ROLLS = 1000
dieRolls = [random.randrange(6)+random.randrange(6)+2 for i in
xrange(NUM_ROLLS)]

# create dummy list entries for impossible rolls of 0 and 1
rolls = [None,None]

rolls += [len(list(g)) for k,g in itertools.groupby(sorted(dieRolls))]

# print out nice histogram
for i,r in enumerate(rolls):
    if i > 1:
        print "%2d - %s" % (i,"*"*int(round(r/10.0)))


prints:

 2 - ***
 3 - *****
 4 - *********
 5 - **********
 6 - ***************
 7 - ******************
 8 - **************
 9 - *********
10 - *******
11 - *******
12 - ***





From jzgoda at o2.usun.pl  Fri Feb 24 14:49:28 2006
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Fri, 24 Feb 2006 20:49:28 +0100
Subject: MySQLdb slow on MySQL 5
In-Reply-To: <dtni65$dnv$1@wake.carmen.se>
References: <1140716394.225560.27920@t39g2000cwt.googlegroups.com>	<mailman.2364.1140721473.27775.python-list@python.org>	<1140727082.800917.44550@i40g2000cwc.googlegroups.com>	<dtmk8t$an9$1@wake.carmen.se>
	<mailman.2392.1140782962.27775.python-list@python.org>
	<dtni65$dnv$1@wake.carmen.se>
Message-ID: <dtno33$qbk$1@nemesis.news.tpi.pl>

Magnus Lycka napisa?(a):

> For those who don't know, Oracle bought a small Finnish
> company which developed the transaction-aware table-
> backend for MySQL. As far as I understand, this means
> nothing for GPL licensed MySQL installations, but if
> MySQL sells commercial MySQL-database with transaction
> support, I guess they need to share their incomes with
> Oracle now, and I suppose Oracle is completely in charge
> of future development and price setting for InnoDB. Of
> course, MySQL has support for swapping table backends,
> and the logical next step might be to use the major open
> source transactional low level database Berkeley DB,
> which is also dual licensed, and developed by SleepyCat.
> Unfortuantely, Oracle just bought them... I'm sure there
> are other ways out though. MySQL owns MaxDB, which was
> previously SAP DB, a derivate ot the German Adabas D.
> I'm not sure how easy it is to rip out the table back-
> end of that though. I guess it's not built to be a
> separate component.

They just hired Jim Starkey. Perhaps MySQL AB hopes he will write a
transactional engine for MySQL, as he previously wrote one for Interbase
(which is known to be one of the best a man could imagine).

Anyway, we got far off topic, so we better go somewhere else.

-- 
Jarek Zgoda
http://jpa.berlios.de/


From nephish at xit.net  Mon Feb  6 12:00:16 2006
From: nephish at xit.net (nephish at xit.net)
Date: 6 Feb 2006 09:00:16 -0800
Subject: in over my head ascii
Message-ID: <1139245216.350356.272170@z14g2000cwz.googlegroups.com>

Hello there,
i need to write a script that can transfer info back and forth with a
data server at so-and-so ip.

i have Programming Python, which covers socket programming. So thats
cool. But what i need to know how to do is make a message in ascii that
is what the server is looking for.

for example , to send a request, the first three bytes have to be ascii
"STX"
then there has to be  4 bytes that show the length of the message
then the actual message
then the last three bytes have to be "ENX"

also all int variables must me unsigned long-int (32 bit).

so here is what i need to know,
1 how do i make something in ascii bytes to send off to this server ?
2 how can i make sure something is a 32bit unsigned long int. ?

If the answers i am looking for are pretty straightforward, please let
me know., If they are long and complicated, please point me to some
good documentation . 

thanks for all,
sk



From mwilliams at mgreg.com  Sun Feb  5 16:10:34 2006
From: mwilliams at mgreg.com (Michael Williams)
Date: Sun, 5 Feb 2006 16:10:34 -0500
Subject: what's wrong with my popen reasoning?
In-Reply-To: <mailman.5037.1139169475.27774.python-list@python.org>
References: <mailman.5037.1139169475.27774.python-list@python.org>
Message-ID: <01631058-436B-409A-ABC9-B0FDE3AF13A2@mgreg.com>

Hello,

I would possibly look into using Pexpect (http:// 
pexpect.sourceforge.net/) and the python "time" module for things of  
this nature.  It gives you a bit more granular control over what  
happens when.

Regards,
Michael


On Feb 5, 2006, at 2:57 PM, python-list-request at python.org wrote:

> From: Rick Spencer <rick at localhost.localdomain>
> Date: February 5, 2006 1:39:18 PM EST
> To: python-list at python.org
> Subject: what's wrong with my popen reasoning?
>
>
> Hi all,
>
> I am very new to Python programming. I am writing a program to manage
> wireless connections, this is for GNOME on Linux. I present the  
> user with
> a "connect" button. I want to handle the connection for them slightly
> different depending on whether or not the wireless access point  
> they are
> trying to connect to is secure. In either case, I have a similar  
> question.
>
> In the first case, the wireless access point is secured. I want to  
> bring
> up the GNOME applet for configuring a wireless access interface.  I  
> can
> pass the command line commands to bring it up, but I can't figure  
> out how
> to bring it up in a modal fashion, so that my Python program waits  
> for the
> user to dismiss it before my program gets control again.
>
> In the second case, the access point is not secured. I just want to  
> fire
> off the command line utility (iwconfig) for connecting. In this  
> case, I
> want my program to wait until iwconfig is done before continuing on. I
> figure that I could just write a line of code to read in from the  
> console,
> but I thought there might be a more pythonic way of doing it.
>
> Here's my function so far, with variables replaced with constants  
> to make
> it easier to read:
>
> def connect_clicked(self, widget, data=None):
>  if locked:
>   os.popen("sudo network-admin -c ath0")
>   self.emit('connection-attempted', "ath0")
>
>  else:
>   os.popen("sudo iwconfig ath0 ap 00:0F:B3:31:CB:01")
>  self.emit('connection-attempted', "ath0")
>
> Thanks much!
>
> Cheers, Rick
>

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From s323 at mail.ru  Tue Feb 14 07:12:37 2006
From: s323 at mail.ru (Sergey)
Date: Tue, 14 Feb 2006 15:12:37 +0300
Subject: file names longer than MAX_PATH under Windows 2003
References: <dssev8$tr5$1@news.rtcomm.ru>
	<pan.2006.02.14.11.43.48.318400@REMOVETHIScyber.com.au>
	<pan.2006.02.14.12.09.41.447607@REMOVETHIScyber.com.au>
Message-ID: <dsshfl$vqa$1@news.rtcomm.ru>


"Steven D'Aprano" <steve at REMOVETHIScyber.com.au> wrote in message news:pan.2006.02.14.12.09.41.447607 at REMOVETHIScyber.com.au...
> Are you passing a unicode object to the function?
>
> f = file(u"E:\\files\\...\\something.dat", "r")

I pass variable c into functions:

>>> c
u'\\\\.\\e:\\files\\\u041f\u0420\u041e\u0414\u041e \u041c\u0435\u043d\u0435\u043
[many unicode chars skipped]
44b\u0439_\u0411\u044e\u0434\u0436\u0435\u0442.xls'




From sbaush at gmail.com  Thu Feb  2 18:37:43 2006
From: sbaush at gmail.com (Sbaush)
Date: Fri, 3 Feb 2006 00:37:43 +0100
Subject: Control if a input text is IP
In-Reply-To: <dru3qq$eic$1@sea.gmane.org>
References: <fc5d4c490602021458l7665ce6u@mail.gmail.com>
	<dru3qq$eic$1@sea.gmane.org>
Message-ID: <fc5d4c490602021537p12bb9ed7l@mail.gmail.com>

thanks!! your ipcheck is perfect fo me!!


2006/2/3, Fredrik Lundh <fredrik at pythonware.com>:
>
> Sbaush wrote:
>
> > My app has in input an ip address in IPv4 notation.
> > is there a function that control if input is a string in IPv4 notation?
>
> here's one way to do it:
>
> def ipcheck(s):
>     try:
>         a, b, c, d = [chr(int(c)) for c in s.split(".")]
>     except ValueError:
>         return False
>     else:
>         return True
>
> another way is to use regular expressions; see
>
>     http://www.regular-expressions.info/examples.html
>
> </F>
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



--
Sbaush
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From robert.kern at gmail.com  Thu Feb 16 22:14:28 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 16 Feb 2006 21:14:28 -0600
Subject: calculating on matrix indices
In-Reply-To: <43F50D7F.8010108@bryant.edu>
References: <43F50D7F.8010108@bryant.edu>
Message-ID: <dt3f2m$1k3$1@sea.gmane.org>

Brian Blais wrote:
> Hello,
> 
> In my attempt to learn python, migrating from matlab, I have the following problem. 
> Here is what I want to do, (with the wrong syntax):
> 
> from numpy import *
> 
> t=arange(0,20,.1)
> x=zeros(len(t),'f')

Also, you probably don't want to be using literal typecode strings. It's easy to
forget which code corresponds to which type. They are only accepted in numpy for
compatibility with Numeric. Use the real dtype objects instead: numpy.float32,
numpy.float64, etc. The builtin type objects int and float are also accepted for
convenience and correspond to the C types that underlie the respective Python
objects.

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From wolfgang.lipp at gmail.com  Fri Feb  3 16:17:03 2006
From: wolfgang.lipp at gmail.com (wolfgang.lipp at gmail.com)
Date: 3 Feb 2006 13:17:03 -0800
Subject: web.py + cheetah delivering incomplete pages
In-Reply-To: <1138988779.571240.209970@g43g2000cwa.googlegroups.com>
References: <1138977432.206287.16130@g47g2000cwa.googlegroups.com>
	<1138988779.571240.209970@g43g2000cwa.googlegroups.com>
Message-ID: <1139001423.549772.325090@f14g2000cwb.googlegroups.com>

yeah, posted it there too, but, you see, there are but 95 members in
that group -- guess it's more productive to ask this right here. we'll
see.

_w.



From claudio.grondi at freenet.de  Wed Feb 15 22:15:37 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Thu, 16 Feb 2006 04:15:37 +0100
Subject: Xah's Edu Corner: accountability & lying thru the teeth
In-Reply-To: <dss912$luv$1@mamenchi.zrz.TU-Berlin.DE>
References: <1133844932.007824.26780@g43g2000cwa.googlegroups.com>
	<1136236586.734775.212440@f14g2000cwb.googlegroups.com>
	<1137784561.589887.58380@o13g2000cwo.googlegroups.com>
	<1139909629.798938.284160@g47g2000cwa.googlegroups.com>
	<dss912$luv$1@mamenchi.zrz.TU-Berlin.DE>
Message-ID: <dt0qou$9sn$1@newsreader3.netcologne.de>

Anno Siegel wrote:
> Xah Lee <xah at xahlee.org> wrote in comp.lang.perl.misc:
> 
> 
>>...a mechanism, so that any fuckhead tech geekers with their
>>loud cries will hurt badly when they open their mouths in public...
In this above I hear the voice of someone badly disappointed seeking an 
apology and excuse for being in that condition in the world around and 
not inside himself.
My guess from the experience of being, as Usenet newbie, first a victim 
of Xah trolls and from the experience of watching Xah activities over 
currently more than one year, is that:
   The turning point, when one could start to be like Xah is, when 
suddenly for oneself some simple truths which has not been recognized 
for so long before, get revealed before the inner mental eye.
One finds himself in a situation where own past stupidity becomes so 
apparent, that it is hard to accept this fact as it is. The ways to 
manage such condition can be very different. One of the possibilities is 
to look for the 'outside' reasons and make them responsible for the 
misery. There was, is and will be always enough idiocy around, disguised 
as by many people fully accepted absolute truths, which can be made 
guilty of keeping a believing them individual relatively stupid for a 
very long time (or even forever).
The revelation of the simply fact, that one was 'cheated' for so long by 
  from the just achieved point of view as impertinent insulting and 
stupid considered authorities without being able to see it directly 
already in the past, hurts so much, that it results in strong emotional 
reaction manifestating itself often also in using many dirty words. It 
almost appears in this context, that the past ignorance could be 
considered a blessing ...
After the first caused by the above effect deep depressions has been 
overcome, it can happen, that one starts to hope to manage the misery by 
getting in touch with others to share the just reached level of 
enlightenment in order to progress towards getting rid of eventually 
still existing remaining wrong believes.
The result of this approach can be the experience, that there is as good 
as none to oneself meaningful response and instead of being understood 
one is accused of trolling.
At that point two aspects important in someones life can start to 
compete against each other:
   the accumulated experience and insight, that it makes not much sense 
to ask the most important to oneself questions publicly
and
   the need for staying in active relationship and mental exchange with 
others.
The outcome of such battle can be, that the only way out of this dilemma 
is to actually start to troll to get some fun out of the responses and 
to get the feeling of having impact on others.
There are sure many other ways to manage the situation of becoming 
smarter than before and of staying in contact with many others - Xah has 
chosen to become a troll as one of the most easy variant out of them. I 
hope, that one day, he stops to misjudge own level of enlightenment and 
starts to gain satisfaction out of searching for an also for another 
people valuable way out of the misery his intellect is trapped in 
instead of continuing his mostly trolling motivated postings.

By the way: I found _this_ posting by Xah very interesting and even if 
maybe not at first glance noticeable, very close related to what is all 
the time and continuously hot discussed in the programming related 
newsgroups.

I don't expect Xah to read and reply to this posting, but in spite of 
this, I would be glad to hear from him here, how my guess is close to 
his actual motivation.

> 
> 
> Yeah, good idea!
Sure it would be very interesting to see the bets and the reasoning 
behind the pro and contra.

Claudio
> 
> Anno


From m.wanstall at gmail.com  Sun Feb 19 04:28:06 2006
From: m.wanstall at gmail.com (m.wanstall at gmail.com)
Date: 19 Feb 2006 01:28:06 -0800
Subject: os.mkdir simple help
In-Reply-To: <pan.2006.02.19.08.02.33.411906@REMOVETHIScyber.com.au>
References: <1140335502.110014.35870@g47g2000cwa.googlegroups.com>
	<pan.2006.02.19.08.02.33.411906@REMOVETHIScyber.com.au>
Message-ID: <1140341286.223872.48930@g47g2000cwa.googlegroups.com>

That's got it, thanks Steven!



From sybrenUSE at YOURthirdtower.com.imagination  Mon Feb  6 10:17:36 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Mon, 6 Feb 2006 16:17:36 +0100
Subject: Detecting line endings
References: <1139236514.022464.319970@g14g2000cwa.googlegroups.com>
Message-ID: <slrndueq4g.9pc.sybrenUSE@schuimige.unrealtower.org>

Fuzzyman enlightened us with:
> My worry is that if '\n' *doesn't* signify a line break on the Mac,
> then it may exist in the body of the text - and trigger ``ending =
> '\n'`` prematurely ?

I'd count the number of occurences of '\r\n', '\n' without a preceding
'\r' and '\r' without following '\n', and let the majority decide.

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From cookedm+news at physics.mcmaster.ca  Fri Feb 10 20:11:08 2006
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Fri, 10 Feb 2006 20:11:08 -0500
Subject: Scientific Computing with NumPy
References: <ds7bvh$ab1$2@gemini.csx.cam.ac.uk>
	<mailman.1482.1139225595.27775.python-list@python.org>
	<ds7ch4$bj7$1@gemini.csx.cam.ac.uk>
	<mailman.1704.1139573734.27775.python-list@python.org>
Message-ID: <qnkslqq8ztf.fsf@arbutus.physics.mcmaster.ca>

"linda.s" <samrobertsmith at gmail.com> writes:

> where to download numpy for Python 2.3 in Mac?
> Thanks!
> Linda

I don't know if anybody's specifically compiled for 2.3; I think most
of the developers on mac are using 2.4 :-)

But (assuming you have the developer tools installed) it's really to
compile: python setup.py build && python setup.py install.

Do you need Tiger (10.4) or Panther (10.3) compatibility?

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From haraldarminmassa at gmail.com  Thu Feb 23 08:30:45 2006
From: haraldarminmassa at gmail.com (Harald Armin  Massa)
Date: 23 Feb 2006 05:30:45 -0800
Subject: cx_Oracle and UTF8
In-Reply-To: <465kbtF9bvemU1@uni-berlin.de>
References: <1140628824.353213.278300@o13g2000cwo.googlegroups.com>
	<465kbtF9bvemU1@uni-berlin.de>
Message-ID: <1140701445.217566.239200@z14g2000cwz.googlegroups.com>

Dietz,

thank you for your answer.

> It's called NLS (national language support),
>and it is like a locale-setting in python/C. I'm too lazy to google right

Sad thing: I allready googled that and had to learn: you CAN definitely
change some parameters, that is sort order and language for error
messages with
alter session set NLSREGION  and set NLSLANGUAGE

The only part about the charset is with NLSLANG, which could be set to
German_Germany.UTF8

BUT ... NLSLANG is no per-session parameter, not setable per alter
session, it needs to get set within the environment to make SQLPLUS
recognize it.  (and, I do of course use python not sqlplus=

In another of the WWW I learned that NLSLANG has to be set on per
connection basis; not on per cursor / session basis; so my primary
suspect is cx_Oracle.Connection ... but those objects to not have a
visible method with any "encoding" in it.

Harald



From andre.burgaud at gmail.com  Sun Feb 12 20:03:15 2006
From: andre.burgaud at gmail.com (Andre Burgaud)
Date: Sun, 12 Feb 2006 19:03:15 -0600
Subject: Python equivilant to msgbox()
In-Reply-To: <7CQHf.2690$7C3.1780@trnddc08>
References: <7CQHf.2690$7C3.1780@trnddc08>
Message-ID: <158731350602121703u73515f6dhb74ac0bd1a722fa@mail.gmail.com>

Hi,

If you target Windows, you may try ctypes
http://starship.python.net/crew/theller/ctypes/:

>>> from ctypes import *
>>> windll.user32.MessageBoxA(None, "MessageBox Text", "MessageBox Caption",
0)
1
>>>


or win32api http://starship.python.net/crew/mhammond/win32/:
>>> import win32api
>>> win32api.MessageBox(0, "Text", "Title")
1
>>>

Regards,

Andre
http://www.burgaud.com/



On 2/12/06, LittlePython <LittlePython at lost.com> wrote:
>
> Is there an equivalent to a msgbox() or wscript.echo (via wcsript) . I
> would like to call this instead of print (to the screen) . I would like to
> write a simple script that is not an event drive gui but calls input boxes,
> message boxes, or maybe even a file open browser box as well?
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>
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From nospamformeSVP at gmail.com  Sun Feb 26 17:01:45 2006
From: nospamformeSVP at gmail.com (Don Taylor)
Date: Sun, 26 Feb 2006 17:01:45 -0500
Subject: Use of __slots__
Message-ID: <dtt8ga$7b2$1@sea.gmane.org>

Hi:

I am puzzled about the following piece of code which attempts to create 
a class that can be used as record or struct with a limited set of 
allowed attributes that can be set into an instance of the class.

class RecordClass(object):
     __slots__ = ["foo"]
     def __init__(self, args):
         print "Initial slots = ", RecordClass.__slots__
         RecordClass.__slots__ = list(args)
         print "Final slots = ", RecordClass.__slots__
     pass

def new_record(slotlist):
     return RecordClass(slotlist)

if __name__ == "__main__":
      record1 = new_record(["age", "name", "job"])
      record1.age = 27
      record1.name = 'Fred'
      record1.job = 'Plumber'
      record1.salary = 50000

When executed I get:

Initial slots =  ['foo']
Final slots =  ['age', 'name', 'job']
Traceback (most recent call last):
   File "D:\ProgrammingProjects\JustForTesting\recordclasses.py", line 
37, in ?
     record1.age = 27
AttributeError: 'RecordClass' object has no attribute 'age'

I don't understand why I cannot set an attribute 'age' into record1.

Thanks,

Don.



From *firstname*nlsnews at georgea*lastname*.com  Thu Feb  9 23:04:02 2006
From: *firstname*nlsnews at georgea*lastname*.com (Tony Nelson)
Date: Fri, 10 Feb 2006 04:04:02 GMT
Subject: super(...).__init__() vs Base.__init__(self)
References: <43eb5a9d$1_2@newspeer2.tds.net>
	<K5mdnTQ_1Ime4XbeRVn-ig@comcast.com>
	<43eba7f7$0$507$9b4e6d93@newsread4.arcor-online.net>
Message-ID: <*firstname*nlsnews-14ADC6.23042609022006@news.verizon.net>

In article <43eba7f7$0$507$9b4e6d93 at newsread4.arcor-online.net>,
 Jan Niklas Fingerle <usenet-2004 at lithe.de> wrote:

> ...Super is a good tool to use, when dealing with
> diamond shape inheritance. In any other case I would use the direct
> calls to the base classes. In fact, i've yet to find a non-textbook-case
> where I really need diamond shape inheritance. ...

As long as you don't use multiple inheritance with new-style classes, 
you'll be fine.
________________________________________________________________________
TonyN.:'                        *firstname*nlsnews at georgea*lastname*.com
      '                                  <http://www.georgeanelson.com/>


From python-url at phaseit.net  Mon Feb 27 18:19:16 2006
From: python-url at phaseit.net (Cameron Laird)
Date: Mon, 27 Feb 2006 23:19:16 +0000
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Feb 27)
Message-ID: <mailman.2497.1141095441.27775.python-announce-list@python.org>

QOTW:  "Actually, Python has the distinction of being both a great tool
language *and* a great Zen language. That's what makes Python so cool
;-)))" - Ron Stephens

"It is probably possible to do the whole thing with a regular expression.
It is probably not wise to do so." - John Zenger (among MANY other wise
people)


    Steve Holden generates abundant volume of PyCon reportage
    when executive responsibilities don't tether him:
       http://holdenweb.blogspot.com/

    A question from Brian Blais on the simplest non-trivial sorting
    elicits a satisfying range of expressions:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/560fda5a309a08ab/

    Use the 'Net for backups in a far more sophisticated way:
        http://www.csua.berkeley.edu/~emin/source_code/dibs/   

    A beta release of the updated official Python site will go 
    live on 5 March 2006:
        http://wiki.python.org/moin/PyCon2006/Sprints/PydotorgSprint


========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Steve Bethard, Tim Lesher, and Tony Meyer continue the marvelous
    tradition early borne by Andrew Kuchling, Michael Hudson and Brett
    Cannon of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and
sponsor the "Python-URL!" project.


From amorgan at xenon.Stanford.EDU  Wed Feb  8 13:57:19 2006
From: amorgan at xenon.Stanford.EDU (Alan Morgan)
Date: Wed, 8 Feb 2006 10:57:19 -0800 (PST)
Subject: Too Many if Statements?
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<GU8Gf.22899$Jd.6095@newssvr25.news.prodigy.net>
	<dsb95i$pld$1@xenon.Stanford.EDU>
	<1139384021.290153.120470@g14g2000cwa.googlegroups.com>
Message-ID: <dsdeuf$pig$1@xenon.Stanford.EDU>

In article <1139384021.290153.120470 at g14g2000cwa.googlegroups.com>,
Pierre Quentel <quentel.pierre at wanadoo.fr> wrote:
>This is because Python has a hidden mechanism to detect programs
>generated by Perl scripts, and make them crash with no explanation

In my case it turned out to be python having a hidden method to detect when
you are using an ancient version of python.  Retesting with a newer version
didn't find any problems. 

Alan
-- 
Defendit numerus


From onurb at xiludom.gro  Tue Feb 14 07:16:40 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Tue, 14 Feb 2006 13:16:40 +0100
Subject: [OT] Pythonic gui format?
In-Reply-To: <dsshh2$8r3$1@online.de>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<43f11990$0$667$626a54ce@news.free.fr> <dsshh2$8r3$1@online.de>
Message-ID: <43f1ca45$0$7339$626a54ce@news.free.fr>

Christoph Zwerschke wrote:
> Bruno Desthuilliers schrieb:
> 
>> Gregory Petrosyan a ?crit :
>>
>>> I am currently seeking for pythonic alternative for XML. 
>>
>>
(snip)


> Bruno, before writing another simple GUI, 

<OT>
Sorry, Christoph, wrong attribution  !-)
</OT>

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From rtilley at vt.edu  Wed Feb  8 08:34:35 2006
From: rtilley at vt.edu (rtilley)
Date: Wed, 08 Feb 2006 08:34:35 -0500
Subject: os.walk() dirs and files
In-Reply-To: <dscrjr$joa$1@solaris.cc.vt.edu>
References: <dscrjr$joa$1@solaris.cc.vt.edu>
Message-ID: <dscs1j$k9l$1@solaris.cc.vt.edu>

rtilley wrote:
> Hello,
> 
> When working with file and dir info recursively on Windows XP. I'm going 
> about it like this:
> 
> for root, dirs, files in os.walk(path):
>     for f in files:
>         ADD F to dictionary
>     for d in dirs:
>         ADD D to dictionary
> 
> Is it possible to do something such as this:
> 
> for root, dirs, files in os.walk(path):
>     for f,d in files, dirs:
>         ADD F|D to dictionary

Just to clarify. In this particular case, I do not need to differentiate 
between files and dirs... so would it be possible to do something such 
as this:

for root, dirs, files in os.walk(path):
     for fs_object in files, dirs:
         ADD fs_object to dictionary


From cipherpunk at gmail.com  Sun Feb 19 03:43:13 2006
From: cipherpunk at gmail.com (Robert J. Hansen)
Date: 19 Feb 2006 00:43:13 -0800
Subject: Python vs. Lisp -- please explain
In-Reply-To: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
Message-ID: <1140338593.555029.63860@g43g2000cwa.googlegroups.com>

> what [is it] about Python that is so different from Lisp that it
> can't be compiled into something as fast as compiled Lisp?

IMO, it's the lack of competing implementations.

LISP has a very well-defined ANSI specification.  Lots of different
people have written LISPs, from Franz to Steel Bank to GNU to... etc.
Each of these competes with the others on different grounds; some are
purely interpreted (ala CLISP), some are compiled (CMUCL), some are...
etc.  They all implement substantially the same language, but the
plethora of different implementations has been a tremendous boon for
the development of efficient compilers, interpreters and garbage
collectors.

By comparison, Python lacks anywhere near as many competing
implementations.

In some respects the lack of competing implementations is a Good Thing.
 In some respects it's a Bad Thing.  On balance it's just a thing.



From timr at probo.com  Wed Feb 15 03:15:47 2006
From: timr at probo.com (Tim Roberts)
Date: Wed, 15 Feb 2006 08:15:47 GMT
Subject: how to write a C-style for loop?
References: <gZednVPdAtumI2_eRVn-jw@rcn.net>
Message-ID: <8oo5v11ssquc1ota7j8ualtv9ugdgrn5ql@4ax.com>

John Salerno <johnjsal at NOSPAMgmail.com> wrote:
>
>I assume this is the way for loops are written in C, but if it helps to 
>be specific, I'm referring to C# for loops. The Python for loop seems to 
>be the same (or similar) to C#'s foreach loop:
>
>foreach int i in X
>
>But how would you write a C# for loop in Python? Do you rework a while 
>loop, or use the range() function?
>
>Here's an example:
>
>for (int i = 0; i < 50; i += 5)
>
>How would that go in Python, in the simplest and most efficient way?

  for i in range(0,50,5):
      print i
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From sw at wordtech-software.com  Sat Feb 11 12:03:42 2006
From: sw at wordtech-software.com (Kevin Walzer)
Date: Sat, 11 Feb 2006 12:03:42 -0500
Subject: Yet another GUI toolkit question...
In-Reply-To: <mailman.1753.1139677075.27775.python-list@python.org>
References: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>	<mailman.1743.1139664790.27775.python-list@python.org>	<1139674743.846644.281840@z14g2000cwz.googlegroups.com>
	<mailman.1753.1139677075.27775.python-list@python.org>
Message-ID: <43EE18EE.2010006@wordtech-software.com>

Steve Holden wrote:
> Robert Hicks wrote:
>> Wow you are so wrong about Tk on OSX. Soon this is just not going to be
>> the case at all for any of the system Tcl/Tk runs on. The Tcl folks
>> have come out with a package called "Tile" that is going to be rolled
>> in. It gives you native L&F on OSX, Windows, Linux.
>>
> This is good news if it happens, but right now it's just another dose of
> "real soon now".
> 
> regards
>  Steve

Not true. It's already available. I've shipped three open-source and one
commercial application making use of Tile.

The Tkinter wrapper is here:

http://mfranklin.is-a-geek.org/docs/Tile/index.html

The server is down at the moment but is supposed to be back online shortly.

-- 
Kevin Walzer
iReveal: File Search Tool
http://www.wordtech-software.com


From sw at wordtech-software.com  Sun Feb 12 11:36:07 2006
From: sw at wordtech-software.com (Kevin Walzer)
Date: Sun, 12 Feb 2006 11:36:07 -0500
Subject: ANN: PyGUI 1.6
In-Reply-To: <mailman.1780.1139755064.27775.python-announce-list@python.org>
References: <mailman.1780.1139755064.27775.python-announce-list@python.org>
Message-ID: <41ec2$43ef63f7$4275d90a$28603@FUSE.NET>

greg wrote:
> PyGUI 1.6 is now available:
> 
>   http://www.cosc.canterbury.ac.nz/~greg/python_gui/
> 
> The major change in this version is that the Mac version
> is based on Cocoa instead of Carbon. This should provide a
> much better base for future development, but it does mean
> that MacOSX will now be required. (This isn't as big a
> change as it seems, since the Carbon version actually
> required MacOSX too, despite being Carbon.)
> 
> There have been numerous other changes and improvements
> as well. See the CHANGES file in the distribution or on
> the web site for full details.
> 

Does anyone actually use this toolkit? How does it compare to wxPython,
for instance?


-- 
Kevin Walzer
iReveal: File Search Tool
http://www.wordtech-software.com


From fakeaddress at nowhere.org  Wed Feb 15 21:04:59 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Thu, 16 Feb 2006 02:04:59 GMT
Subject: is socket thread safe?
In-Reply-To: <mailman.1968.1140037150.27775.python-list@python.org>
References: <1139912679.559724.131020@f14g2000cwb.googlegroups.com>	<dsvtn8$qvv$1@news.freedom2surf.net>
	<mailman.1968.1140037150.27775.python-list@python.org>
Message-ID: <f5RIf.6595$rL5.6526@newssvr27.news.prodigy.net>

Carl J. Van Arsdall wrote:
> Steve Horsley wrote:
> 
>> e2wugui at gmail.com wrote:
>>  
>>
>>> thread1:
>>>     while 1:
>>>         buf = s.read()
>>>         process(buf)
>>>
>>> thread2:
>>>     while 1:
>>>         buf = getdata()
>>>         s.write(buf)    
>>
>>
>> It is safe, but watch out for this gotcha: If thread B calls s.close() 
>> while thread A is blocked in s.read(), thread A will never return from 
>> the read. My preferred solution is to set socket timeout to a few 
>> seconds, and loop checking a status flag so I know when to quit.

Certainly one needs timeouts to avoid hanging should the remote
side stop. Sockets don't have a read() method, and hanging on
recv() doesn't seem to have anything to do with close().

I didn't find any definitive doc, so I tested using Python
sockets on Linux (Debian/Ubuntu current) and WinXP. A recv()
started before the close() will block/return just as if
close() were never called. The close() neither triggers recv()
to abort, nor prevents it from receiving data and detecting
shutdown.


> I think a better thing would be to use something like a condition object 
> to tie the two threads together and not use any polling loops.
> 
> i.e.  consumer goes to sleep while data buffer is empty, producer 
> produces and signals condition object, consumer wakes up and consumes.

I can infer two producer-consumer relationships from the example,
but they don't allow a condition object; the writer's consumer and
the reader's producer are on the remote end of the socket. The
socket will already handle the blocking and wake-up.

> To take this a step further, you have a status flag that is set to 
> something like QUIT or CONSUME and when the condition is triggered wake 
> up, then examine the status flag to determine if the consumer should 
> then quit, consume, or whatever else you'd want your consumer thread to do.

What problem are you trying to solve? Normal socket sending, receiving,
and shutdown discipline work fine. When the writer is done writing, it
should call sock.shutdown(socket.SHUT_WR). When the reader gets zero
bytes from recv(nonzero), that means the remote end has finished
writing, so the reader may call sock.shutdown(socket.SHUT_RD).


-- 
--Bryan


From grahn+nntp at snipabacken.dyndns.org  Mon Feb 13 17:19:54 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 13 Feb 2006 22:19:54 GMT
Subject: Netstat in python. Does it's possible?
References: <s1mHf.5180$9G6.428@tornado.fastwebnet.it>
	<43EE0286.5020409@v.loewis.de>
	<slrndusfol.2t1.grahn+nntp@frailea.sa.invalid>
	<43EE7B7E.5050802@v.loewis.de>
	<slrnduv78b.2t1.grahn+nntp@frailea.sa.invalid>
	<43efaef5$0$29674$9b622d9e@news.freenet.de>
Message-ID: <slrndv1vpo.2t1.grahn+nntp@frailea.sa.invalid>

On Sun, 12 Feb 2006 22:56:06 +0100, Martin v. L?wis <martin at v.loewis.de> wrote:
> Jorgen Grahn wrote:
>> I was thinking mostly about /proc, /sys and related file systems. I have a
>> feeling parts of them they change quite frequently under Linux, and of
>> course under other Unices they may look completely different, or be absent.
>> 
>> Like Mr Laird said elsewhere, the best thing might be to popen() netstat
>> and parse its output.
>
> Hmm. And the netstat output cannot change, and is identical across all
> systems?

I was going to mention that complication, but I didn't want to depress the
original poster any more ...

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From smitty_one_each at bigfoot.com  Sat Feb 11 21:40:38 2006
From: smitty_one_each at bigfoot.com (Chris Smith)
Date: Sat, 11 Feb 2006 21:40:38 -0500
Subject: Inserting record with Microsoft Access
References: <dse868+n819@eGroups.com> <43EB0355.9000603@compuscan.co.za>
	<mailman.1655.1139487688.27775.python-list@python.org>
	<1139658741.918706.60230@g44g2000cwa.googlegroups.com>
Message-ID: <87zmkx8fkp.fsf@bigfoot.com>

>>>>> "Frank" == Frank Millman <frank at chagford.com> writes:

    Frank> SELECT @@IDENTITY returns the most recent of all
    Frank> inserts. If you have a complex transaction which triggers
    Frank> inserts into other tables, it may not return the one you
    Frank> want.

    Frank> This one allows you to specify the tablename, and it will
    Frank> return the most recent key inserted into that table.

    Frank> I got this from the built-in help for SQLServer. I cannot
    Frank> say whether it works for Access as well.

    Frank> Frank

I've used SELECT @@IDENTITY to good effect, but I agree that there is
no telling what the scope of the variable holding  @@IDENTITY is, and
it could turn out to be a kick in the naughty bits.

Depending on the criteria, you might effect the INSERT for a parent
record, and contiue any child record INSERTs by means of the DLookup()
function (Access-only syntactic sugar around nested SELECTs) without
ever having to know the key you would have discovered through 
SELECT @@IDENTITY.

R,
Chris


From lycka at carmen.se  Fri Feb 10 07:01:40 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 10 Feb 2006 13:01:40 +0100
Subject: Too Many if Statements?
In-Reply-To: <1139517959.741090.28560@g14g2000cwa.googlegroups.com>
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<6e2iu1hdb8fvlfkcuulloiiq1khlbhret1@4ax.com>
	<1139517959.741090.28560@g14g2000cwa.googlegroups.com>
Message-ID: <dshvb4$jfn$1@wake.carmen.se>

slogging_away wrote:
> Adding it back in
> cause it to not run - no error message - just a return to the >>> in
> the IDLE console window much as if I had executed the 'Check Module'
> command.

What happens if you run it from the command line instead
of IDLE? After all, it might be some problem in IDLE involved
here. Even if it doesn't work correctly outside IDLE, I was
thinking that IDLE might swallow some kind of error message.


From lucaberto at libero.it  Thu Feb 23 08:10:56 2006
From: lucaberto at libero.it (luca72)
Date: 23 Feb 2006 05:10:56 -0800
Subject: Pyserial never read
In-Reply-To: <lt5pv159gtijha966nk97k5hrqhkehkmis@4ax.com>
References: <1140105936.408387.88130@z14g2000cwz.googlegroups.com>
	<1140219414.143448.234450@z14g2000cwz.googlegroups.com>
	<1140302110.028540.176210@g43g2000cwa.googlegroups.com>
	<slrndvm0sr.6k1.nick@irishsea.home.craig-wood.com>
	<mailman.2241.1140536285.27775.python-list@python.org>
	<slrndvn1ad.he1.nick@irishsea.home.craig-wood.com>
	<1140599901.082142.262540@f14g2000cwb.googlegroups.com>
	<lt5pv159gtijha966nk97k5hrqhkehkmis@4ax.com>
Message-ID: <1140700256.017002.177580@f14g2000cwb.googlegroups.com>

Hello
  ALSO... YOU NEVER SPECIFY A VARIABLE TO RECEIVE THE DATA -- ANYTHING
YOU DO READ IS BEING DUMPED ON THE FLOOR!

I see the read data with a sniffer.

with the same serial caracteristic in delphi i obtain the right answer.

I use serial writestr and serial readstr.


If the serial package is anything like regular file I/O, that
line will buffer/block until a new-line character is received, then
return data upto/including the new-line. If the inbound data has
multiple lines, you need individual readlines.

For example i i send D0360000EC the right answer is
D0360000EC0000FFBC35DC44 etc...
i need new Line?

why if i use ser.read(10) i see only the first 5 byte and not the rest,
why if i use the inwaigth i answer that i have only 5 byte to read.


Regards

Luca



From martin at v.loewis.de  Tue Feb  7 14:43:32 2006
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 07 Feb 2006 20:43:32 +0100
Subject: Python 2.4.2 using msvcrt71.dll on Win and compatibility issues
In-Reply-To: <dsaqcf$jb5$1@online.de>
References: <dsaqcf$jb5$1@online.de>
Message-ID: <43E8F864.6050605@v.loewis.de>

Christoph Zwerschke wrote:
> Is there a general strategy to avoid this kind of problems?

In general, the only Microsoft-supported strategy is that you
must use only a single msvcrt in the entire application. So
either recompile PostGres, or recompile Python.

In the specific case, having PQprint print to a string (rather
than to a file) might work. OTOH, it appears there is no "print
to string" code in postgres.

So here is another strategy: flush the stream before going
into postgres, then obtain the fileno() of the stream, and
fdopen it with postgres' iostreams library. That might also
be tricky to implement, but could work.

Regards,
Martin


From fredrik at pythonware.com  Mon Feb 13 13:27:10 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Feb 2006 19:27:10 +0100
Subject: Location of Python modules
References: <1139854184.504114.46690@z14g2000cwz.googlegroups.com>
Message-ID: <dsqj20$r0t$1@sea.gmane.org>

"Byte" wrote:

> Pretty much self explanatry, where are Python modules stored in Linux?
> (i.e. in /usr/bin/local, or where?)

it depends on how and where Python is installed.  to see where they
are on your install, use

$ python -c "import sys; print sys.path"
['', '/usr/lib/python24.zip', '/usr/lib/python2.4', '/usr/lib/python2.4/plat-linux2',
'/usr/lib/python2.4/lib-tk', '/usr/lib/python2.4/lib-dynload',
'/usr/local/lib/python2.4/site-packages', '/usr/lib/python2.4/site-packages', ...

to check where a given module is installed, you can do

$ python -c "import cgi; print cgi.__file__"
/usr/lib/python2.4/cgi.pyc

hope this helps!

</F>





From LittlePython at lost.com  Tue Feb 14 21:37:14 2006
From: LittlePython at lost.com (LittlePython)
Date: Wed, 15 Feb 2006 02:37:14 GMT
Subject: Python equivilant to msgbox()
References: <7CQHf.2690$7C3.1780@trnddc08> <43efd40a$1_2@newspeer2.tds.net>
	<6WQHf.2700$7C3.2665@trnddc08>
	<dsq6oc$lb8$1@newsreader3.netcologne.de>
	<3buIf.32386$lo3.16580@trnddc07>
	<dstup1$rm$1@newsreader3.netcologne.de>
Message-ID: <utwIf.16099$7C3.5496@trnddc08>

 I am glad you did remind me of WScript.Shell ... I have to keep in mind
that most if not all of what I have been using in VBS is avail to me.
Thx

"Claudio Grondi" <claudio.grondi at freenet.de> wrote in message
news:dstup1$rm$1 at newsreader3.netcologne.de...
> LittlePython wrote:
> > I am no VB programmer just dabble in vbscripting abit. The only one I am
> > aware of is the popup as self closing. I never thought of using com.
> Ok, so my remarks about COM were not for you.
> >
> > Do you know of any thing for a busy box in the same vain as easygui
> No, I don't, but it doesn't mean, that there is none considering myriads
> of various available COM components. My idea was to make you aware, that
> you can use your VB compiler for creating any ActiveX/COM components for
> usage with Python the way I have described, but as you write it seems
> not to be an option for you.
>
> So I have to admit, that EasyGUI is in your case apparently
> >>> exactly what you was looking for ...
>
> :-)
>
> Claudio
> >
> >
> > "Claudio Grondi" <claudio.grondi at freenet.de> wrote in message
> > news:dsq6oc$lb8$1 at newsreader3.netcologne.de...
> >
> >>LittlePython wrote:
> >>
> >>>That is exactly what I was look for .. thx
> >>
> >>Surprised to hear that.
> >>
> >>As VisualBasic programmer I would expect you to have experience with
> >>ActiveX on Windows, where the best way to go with Python is to reuse all
> >>the ActiveX components and their known user interfaces (i.e. constants
> >>to use as parameter and constants for interpretation of return values)
> >>directly from within Python.
> >>
> >>A message box goes e.g. this way:
> >>
> >> >>> import win32com.client
> >> >>> axWshShell = win32com.client.Dispatch("WScript.Shell")
> >> >>> axWshShell.Popup(u"(MsgText)This axWshShell.Popup closes itself
> >>after 45 seconds", 45, u"(MsgTitle)Testing WScript.Shell object:", 1)
> >>
> >>By the way: is there a ready for direct use timed self closing Ok/Cancel
> >>message box in any of the proposed GUI packages?
> >>
> >>Claudio
> >>
> >>>
> >>>"Kent Johnson" <kent at kentsjohnson.com> wrote in message
> >>>news:43efd40a$1_2 at newspeer2.tds.net...
> >>>
> >>>
> >>>>LittlePython wrote:
> >>>>
> >>>>
> >>>>>Is there an equivalent to a msgbox() or wscript.echo (via wcsript) .
I
> >>>>>would like to call this instead of print (to the screen) . I would
like
> >>>>>to write a simple script that is not an event drive gui but calls
input
> >>>>>boxes, message boxes, or maybe even a file open browser box as well?
> >>>>
> >>>>Take a look at EasyGUI:
> >>>>http://www.ferg.org/easygui/
> >>>>
> >>>>Kent
> >>>
> >>>
> >>>
> >
> >




From steve at hastings.org  Fri Feb 24 21:24:56 2006
From: steve at hastings.org (Steve R. Hastings)
Date: Fri, 24 Feb 2006 18:24:56 -0800
Subject: list assignment using concatenation "*"
References: <1140832774.530010.251930@j33g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.25.02.24.53.868487@hastings.org>

> if I do:
> 
> a = [ [0] * 3 ] * 3
> a[0][1] = 1
> 
> I get
> 
> a = [[0,1,0],[0,1,0],[0,1,0]]

The language reference calls '*' the "repetition" operator.  It's not
making copies of what it repeats, it is repeating it.

Consider the following code:

>>> a = []
>>> b = []
>>> a == b
True
>>> a is b
False
>>>
>>> a = b = []
>>> a is b
True
>>> a.append(1)
>>> a
[1]
>>> b
[1]


Each time you use [], you are creating a new list.  So the first code sets
a and b to two different new lists.

The second one, "a = b = []", only creates a single list, and binds both a
and b to that same list.

In your example, first you create a list containing [0, 0, 0]; then you
repeat the same list three times.

>>> a = [[0]*3]*3
>>> a
[[0, 0, 0], [0, 0, 0], [0, 0, 0]]
>>> a[0] is a[1]
True
>>> a[0] is a[2]
True

When you run [0]*3 you are repeating 0 three times.  But 0 is not mutable.
When you modify a[0] to some new value, you are replacing a reference to
the immutable 0 with some new reference.  Thus, [0]*3 is a safe way to
create a list of three 0 values.

When you have a list that contains three references to the same mutable,
and you change the mutable, you get the results you discovered.
-- 
Steve R. Hastings    "Vita est"
steve at hastings.org    http://www.blarg.net/~steveha



From fredrik at pythonware.com  Sun Feb 19 09:45:28 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 19 Feb 2006 15:45:28 +0100
Subject: Any Tkinker based rich text widget?
References: <1140329900.341774.175600@f14g2000cwb.googlegroups.com>
Message-ID: <dta0ab$fdt$1@sea.gmane.org>

sullivanz.pku at gmail.com wrote:

> I am using the standard python GUI Tkinter as my program's main
> interface. Although I know wxPython has some widget to support rich
> text widget, but I do not have time to shift to wx---- series. Does
> anyone know any Tkinter based widget that support:
>
> 1. Blod, Italic, Underline and their combinations.
> 2. Several most commonly used fonts, like Times New Roman and Arial
> 3. Multiline text
> 4. Cross platform support. Available in Linux-RedHat and Mac OS series
> and Windows 2000 or above.
> 5.Image embedding. Support jpeg, gif, bmp. The more the better.
>
> and better support:
> Hyperlink, Text color, the more the better.

Tkinter's standard Text widget can do all this, of course:

    http://effbot.org/tag/Tkinter.Text

by default, Tkinter only supports GIF and PPM, but you can use PIL's
ImageTk.PhotoImage class instead of Tkinter's own PhotoImage to get
support for ~30 more formats:

    http://www.pythonware.com/products/pil/
    http://effbot.org/tag/PIL.ImageTk

to deal with hyperlinks, use tag event bindings:

    http://effbot.org/zone/tkinter-text-hyperlink.htm

:::

there's in fact a complete browser built on top of Tk's Text widget:

    http://grail.sourceforge.net/

but I don't know how much work it would be to "widgetize" that
application.

hope this helps!

</F>





From sbaush at gmail.com  Thu Feb 23 19:21:10 2006
From: sbaush at gmail.com (Sbaush)
Date: Fri, 24 Feb 2006 01:21:10 +0100
Subject: Fail in sending UDP packet
In-Reply-To: <fc5d4c490602230039lc993e02x@mail.gmail.com>
References: <fc5d4c490602230039lc993e02x@mail.gmail.com>
Message-ID: <fc5d4c490602231621x6bc401a7ic5d85ca836d60f54@mail.gmail.com>

No one of you has a idea??

On 2/23/06, Sbaush <sbaush at gmail.com> wrote:
>
> Hi all. I've attached my SendReceive class. I have e a big problem!
> My program create a packet, then call the send function to send this. the
> first time the packet is not sent, then it works perfectly!
> WHY??? Have you idea??
>
> --
> Sbaush
>



--
Sbaush
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From erniedude at gmail.com  Fri Feb  3 17:34:21 2006
From: erniedude at gmail.com (Ernesto)
Date: 3 Feb 2006 14:34:21 -0800
Subject: Launch Windows command window....
In-Reply-To: <1139005568.749960.261980@g44g2000cwa.googlegroups.com>
References: <1139003975.837861.141680@o13g2000cwo.googlegroups.com>
	<1139004370.221885.190540@f14g2000cwb.googlegroups.com>
	<1139005568.749960.261980@g44g2000cwa.googlegroups.com>
Message-ID: <1139006061.109731.187830@z14g2000cwz.googlegroups.com>


jay graves wrote:
>
> This should work but only lightly tested.
> subprocess.Popen("start telnet.exe -f C:\Folder\output.txt localhost
> 6000",shell=True)

Thanks a lot, but this still didn't launch a seperate telnet window.  I
just want the telnet window to open up and do "it's thing" in the
background.  Thanks again.



From wrongbad at gmail.com  Fri Feb  3 14:09:28 2006
From: wrongbad at gmail.com (I V)
Date: 3 Feb 2006 11:09:28 -0800
Subject: OO conventions
In-Reply-To: <1138971920.353603.38040@f14g2000cwb.googlegroups.com>
References: <mailman.1334.1138833641.27775.python-list@python.org>
	<pan.2006.02.02.11.08.33.964@REMOVETHIScyber.com.au>
	<1138971920.353603.38040@f14g2000cwb.googlegroups.com>
Message-ID: <1138993768.634863.166250@f14g2000cwb.googlegroups.com>

Nicola Musatti wrote:
> I don't think this is all there is to it. Even though a class such as
> Image might not have a sensible default, initial state it still might
> not be reasonable to burden it with the ability to collect the
> information needed to reach such an initial state. To put it it another
> way: a car is a car, it isn't a car factory.

What's the "burden", though? Surely the only burden is that the class
needs to take the relevant parameters to its __init__ method, which is
no more of a burden than providing some other initialization method
that takes the relevant parameters.

> Factory functions (or classes) are there to solve this problem and
> still allow a clean separation of concerns. Although instances of Klass
> are created uninitialized, they only live in this state within their
> factory and only reach trhe outside world only when they are in a
> usable state.

This may be my limited imagination, but I can't think of a situation
when you would prefer something like:

def factory(info):
    k = Klass()
    data = get_initial_data(info)
    k.set_data(data)
    return k

to:

def factory(info):
    data = get_initial_data(info)
    return Klass(data)

What would be the value of doing the initialization in a separate
method, rather than the constructor?



From fabioz at esss.com.br  Thu Feb  2 04:53:18 2006
From: fabioz at esss.com.br (Fabio Zadrozny)
Date: Thu, 02 Feb 2006 07:53:18 -0200
Subject: howto catch an Exception and still print the TraceBack?
In-Reply-To: <43e1af8b$0$343$5fc30a8@news.tiscali.it>
References: <43e073bd$0$341$5fc30a8@news.tiscali.it>
	<43e1af8b$0$343$5fc30a8@news.tiscali.it>
Message-ID: <43E1D68E.5030709@esss.com.br>

Saizan wrote:

>Thanks, I had completely missed the module traceback...
>I'll use traceback.print_exc(), it seems the most straightforward way.
>The only flaw is that the traceback starts in the method where i catch the exception and not from "__main__", but I guess it can't be helped.
>  
>
Actually, I guess that if you wanted to check the 'upper stack', you 
could do it by checking sys._getframe() to get the current frame and 
then go upwards with frame.f_back (that's how debbugers work), that way 
you could get info on all the stacks you currently have... so if you 
think it's worth it... ;-P

Cheers,

Fabio




From matt at pollenation.net  Thu Feb  2 09:09:15 2006
From: matt at pollenation.net (Matt Goodall)
Date: Thu, 02 Feb 2006 14:09:15 +0000
Subject: psycopg2
In-Reply-To: <BAY114-F35CF118676972D97190A55EE080@phx.gbl>
References: <BAY114-F35CF118676972D97190A55EE080@phx.gbl>
Message-ID: <43E2128B.1060204@pollenation.net>

Jane Goldman wrote:
> Hello,
> 
> I bigginer Python programmer. I am working on web application that
> access PostgreSQL on backend. After I imported PSYCOPG2 module in my
> program I started to get unwanded debug output into my web bowser. It is
> something like that:
> 
> initpsycopg: initializing psycopg 2.0b6.2 (dec dt ext pq3)
> typecast_init: initializing NUMBER typecast_new: new type at = 00962920,
> refcnt = 1 typecast_new: typecast object created at 00962920
> typecast_add: object at 00962920, values refcnt = 2 typecast_add: adding
> val: 20 typecast_add: adding val: 23 typecast_add: adding val: 21
> typecast_add: adding val: 701 typecast_add: adding val: 700
> typecast_add: adding val: 1700 typecast_add: base caster: 00000000
> typecast_init: initializing LONGINTEGER typecast_new: new type at =
> 00962960, refcnt = 1 typecast_new: typecast object created at 00962960
> typecast_add: object at 00962960, values refcnt = 2 typecast_add:
> 
> and so on ...
> 
> I use Cheetah template to generate HTML code. I run Active python 2.4 in
> Windows XP enviroment.
> 
> Any help how to stop get this garbage in my web browser would be highly
> appreciated.

It looks you installed a version that has the PSYCOPG_DEBUG flag turned
on. That flag causes psycopg2 to emit gobs of useless information ;-).

I would recommend downloading the latest beta release from
http://initd.org/. Alternatively you can remove the PSYCOPG_DEBUG from
setup.cfg in the version you already have and reinstall.

Hope this helps.

- Matt

-- 
     __
    /  \__     Matt Goodall, Pollenation Internet Ltd
    \__/  \    w: http://www.pollenation.net
  __/  \__/    e: matt at pollenation.net
 /  \__/  \    t: +44 (0)113 2252500
 \__/  \__/
 /  \          Any views expressed are my own and do not necessarily
 \__/          reflect the views of my employer.


From singletoned at gmail.com  Tue Feb  7 09:01:42 2006
From: singletoned at gmail.com (Ed Singleton)
Date: Tue, 7 Feb 2006 14:01:42 +0000
Subject: Question about idioms for clearing a list
In-Reply-To: <1139300825.858426.12680@o13g2000cwo.googlegroups.com>
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<ds83kd$98m$1@sea.gmane.org> <43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>
Message-ID: <34bb7f5b0602070601i2aca76a0r@mail.gmail.com>

On 7 Feb 2006 00:27:05 -0800, Raymond Hettinger <python at rcn.com> wrote:

> There was a pithy Tim Peters quotation to the effect that he was
> unpersuaded by language proposals predicated on some hypothetical
> average programmer not being smart enough to understand something that
> the rest of us find to be basic.

The problem is that the average programmer in question isn't
hypothetical in this case.

I'm a fairly average programmer (better than average compared to my
immediate colleagues).  I've read every tutorial I can get my hands
on, but I have no _memory_  of ever coming across the del keyword, let
alone that it is fundamental to Python, and I have no idea what
collections school is.  I doubtless have read of it at some point, but
as no importance has ever been attached to it, I have probably not
remembered it.

Similarly, I remember slices simply because they are handy, not
because I have ever heard of them being fundamental before.

(I don't argue their fundamentalness one way or other, it's just that
you seem to think that all people who have learned Python have some
knowledge of this hugely important feature).

The other problem with your use of the quote is that the smartness of
the average programmer, or their ability to understand the feature, is
not in question.  It is their ability to know of the existence of the
feature, or to find out about it.

As a general rule of thumb, I would say that if a person is struggling
with a language, it is primarily a problem with the language, and than
problem with the documentation, and lastly a problem with the person.

Ed


From littlejohn.75 at news.free.fr  Sat Feb 18 08:35:54 2006
From: littlejohn.75 at news.free.fr (F. Petitjean)
Date: 18 Feb 2006 13:35:54 GMT
Subject: GDI in python>?
References: <1140242543.204760.174390@g44g2000cwa.googlegroups.com>
Message-ID: <43f722ba$0$29607$626a54ce@news.free.fr>

Le 17 Feb 2006 22:02:23 -0800, al pacino a ?crit :
> hi,
>
> is it possible to address the  'screen pixels' using python , like
> analogous to older dos( functions that graphics.h provides') or win api
> calls for gdi.
Some possibilities (all on Win32 only):
ctypes by Thomas Heller
venster (uses ctypes) on sourceforge
win32all by Marc Hammond
>
> what i want is to display clusters (in differetn colours) on screen
> using python.
>
> thanks.
>


From "jay\" at (none)  Sat Feb 25 10:41:57 2006
From: "jay\" at (none) (none)
Date: Sat, 25 Feb 2006 08:41:57 -0700
Subject: Problem with Property
Message-ID: <TsydnRFxOJsBw53ZnZ2dnUVZ_tqdnZ2d@comcast.com>

I'm trying to implement a simple repeateable property mechansism so I 
don't have to write accessors for every single instance variable I have.
------------
classMyObject:
     def __init__ (self):
         self.initialize()

     def initialize(self):
         self._value=None


     def _setProperty (self, name, value):
         print "set property"
         setattr (self, name, value)

     def _getProperty (self, name):
         print "get property"
         return getattr (self, name)

     #properties
     value = property (lambda self: self._getProperty("_value"),
                      lambda self, value: self._setProperty("_value", 
value))


def testObject():
     o = MyObject()
     print o.__dict__
     print o.value
     o.value = 123
     print o.value
     print o.__dict__

if __name__ == "__main__":
     testObject()
---------

The outout looks like this
------------
{'_value': None}
get property
None
123
{'_value': None, 'value': 123}
-----------
As you can see, the _getProperty() method gets called properly when I do 
  'o.value'  but 'o.value = 123' does not seem to use the property 
stucture.   I can't figure out why 'o.value=123' does not call 
_setProperty()

Any ideas?

Jay


From roy at panix.com  Tue Feb  7 15:34:39 2006
From: roy at panix.com (Roy Smith)
Date: 7 Feb 2006 15:34:39 -0500
Subject: Python Class use
References: <1139344110.219073.244830@f14g2000cwb.googlegroups.com>
Message-ID: <dsb08v$7f3$1@panix2.panix.com>

S Borg <spwpreston at gmail.com> wrote:
> I am running Python on Mac OS X. The interpreter has been great for
> learning the basics, but I would now like to be able to reuse code.

Excellent.  Code reuse is what it's all about!

> How do I write reusable code? I have done it "The Java way": write
> the class, and save it to my home directory, then call it from the
> interpreter

That's pretty much what you do in Python.  Write your class into a
file called foo.py and save it.  Then, start up an interpreter and do
"import foo".  You might want to read about "modules" in the Python
tutorial (http://docs.python.org/tut/node8.html).


From lee at ricis.com  Mon Feb  6 13:44:00 2006
From: lee at ricis.com (Lee Leahu)
Date: Mon, 6 Feb 2006 12:44:00 -0600
Subject: threads and memory
In-Reply-To: <c81fu1968nqolca5fon7kd3edica716rh3@4ax.com>
References: <mailman.1500.1139245971.27775.python-list@python.org>
	<c81fu1968nqolca5fon7kd3edica716rh3@4ax.com>
Message-ID: <20060206124400.351bc0c8@tiger.ricis.com>

Hi List,

> >I am trying to write a simple threaded application which will simulate 1000 
> >connections to a remote service in order to "stress test" that the remote 
> >service can handle that many connections.
> [...]
> >Is there a way to accomplish what I am trying to do, perhaps in a more 
> >memory-friendly way?
> 
> Yes. You don't need one thread per connection:
> http://docs.python.org/lib/module-asyncore.html

I am running into a problem where asyncore is through a filedescriptor error if I try to launch more that 1023 connections:
------------------------------------
Traceback (most recent call last):
  File "./test.py", line 46, in ?
    asyncore.loop()
  File "/usr/lib/python2.4/asyncore.py", line 192, in loop
    poll_fun(timeout, map)
  File "/usr/lib/python2.4/asyncore.py", line 122, in poll
    r, w, e = select.select(r, w, e, timeout)
ValueError: filedescriptor out of range in select()
------------------------------------

Is there a limitation on the number of simultaneous connects that can be made with asyncore ?

Attached is the updated source code.

Thanks!

-- 
Lee Leahu                           RICIS, Inc.
Internet Technology Specialist      866-RICIS-77 Toll Free Voice (US)
lee at ricis.com                       708-444-2690 Voice (International)
http://www.ricis.com/               866-99-RICIS Toll Free Fax (US)
                                    708-444-2697 Fax (International)

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From petr at tpc.cz  Thu Feb 23 20:44:07 2006
From: petr at tpc.cz (Petr Jakes)
Date: 23 Feb 2006 17:44:07 -0800
Subject: pyserial
In-Reply-To: <1140702690.396244.142370@g43g2000cwa.googlegroups.com>
References: <1140702690.396244.142370@g43g2000cwa.googlegroups.com>
Message-ID: <1140745447.632878.286140@p10g2000cwp.googlegroups.com>

Few notes from the Python beginner :) HTH.
I do not understand what do you mean by the expression: ".... I can
read data without try and try again....." Can you be more specific
please. I do not understand what do you exactly mean. AFIK the pyserial
is waiting while the data occur on the serial port (so called blocking
read) so it is not necessary to do some "polling" (checking the serial
port periodically) .

Following snippets of code is running in infinitive loop, but it is not
necessary too be worried about processor utilization because the
readline waits for the data on the serial port and the code continues
to run when data occurs or when timeout passes.

import serial
s = serial.Serial(port=0,baudrate=4800, timeout=20)
while 1:
    line = s.readline()
#   byte = s.read(1) # or you can read No. of bytes according your
needs

Alternatively you can monitor buffer of the serial port and while data
in it, you can read it.

while fd.inWaiting() != 0:
    s.read(1)

you can find plenty of examples about pyserial here
http://tinyurl.com/p8tt5

What I am not able to figure out is why are you trying to print out
input and output buffers (print self.ser.flushInput()) Does it print
out something?

Petr Jakes



From codecraig at gmail.com  Thu Feb 16 09:38:22 2006
From: codecraig at gmail.com (abcd)
Date: 16 Feb 2006 06:38:22 -0800
Subject: Win32_Process.Create -- not starting process
In-Reply-To: <yEncExpress_Rulz!_www.techsono.com_3222902968@firstva.com>
References: <yEncExpress_Rulz!_www.techsono.com_3222902968@firstva.com>
Message-ID: <1140100702.342629.162920@f14g2000cwb.googlegroups.com>

Tim,
    I am skipping using the batch file and only executing the python
script directly...and so far it works fine.

So now I have:
pid, retVal =
wmi.WMI("1.2.3.4").new("Win32_Process").Create(CommandLine="c:\python\python.exe
c:\some_script.py")

Thanks again...not sure why when using the batch file to start it
wouldnt always work, but as long is it works now!



From rrr at ronadam.com  Mon Feb 27 18:21:00 2006
From: rrr at ronadam.com (Ron Adam)
Date: Mon, 27 Feb 2006 17:21:00 -0600
Subject: sort one list using the values from another list
In-Reply-To: <44034b68$1@nntp0.pdx.net>
References: <mailman.2447.1140969980.27775.python-list@python.org>
	<Bb-dncKoOeYvQ5zZRVn-uw@comcast.com>
	<1140981038.788111.93500@j33g2000cwa.googlegroups.com>
	<9bpMf.109707$4l5.58949@dukeread05>
	<1140990438.693026.14600@p10g2000cwp.googlegroups.com>
	<00sMf.109743$4l5.9230@dukeread05>
	<1hbdmux.1uvypp25sjx7jN%aleaxit@yahoo.com>
	<I6tMf.109755$4l5.106334@dukeread05>
	<zpAMf.109772$4l5.24415@dukeread05> <44034b68$1@nntp0.pdx.net>
Message-ID: <VRLMf.110114$4l5.62634@dukeread05>

Scott David Daniels wrote:
> Ron Adam wrote:
>> Ron Adam wrote:

>> This probably should be:
>>
>> def psort11(s1, s2):
>>     d = dict(zip(s2,s1))
>>     assert len(d) == len(s1)
>>     s1[:] = list(d[v] for v in sorted(d))
> 
> You could do this to avoid all of those lookups:
> 
>      def psort_xx(s1, s2):
>          pairs = sorted(dict(zip(s2, s1)).iteritems())
>          assert len(pairs) == len(s1)
>          s1[:] = [s1_value for s2_value, s1_value in pairs]

This version takes twice as long on my system, although the result may 
vary on other platforms. Dictionary lookups are very fast.

Although replacing zip with izip cut the time in half.


def psort11(s1, s2):
     d = dict(izip(s2,s1))
     assert len(d) == len(s1)
     s1[:] = list(d[v] for v in sorted(d))

Ron


From max at alcyone.com  Sat Feb  4 17:23:11 2006
From: max at alcyone.com (Erik Max Francis)
Date: Sat, 04 Feb 2006 14:23:11 -0800
Subject: A problem with some OO code.
In-Reply-To: <1139075482.510942.71640@z14g2000cwz.googlegroups.com>
References: <1139055710.688193.81000@z14g2000cwz.googlegroups.com>
	<pan.2006.02.04.14.34.32.494116@REMOVETHIScyber.com.au>
	<1139075482.510942.71640@z14g2000cwz.googlegroups.com>
Message-ID: <9LSdnb2RLcHNtHjeRVn-pw@speakeasy.net>

TPJ wrote:

> I understand your POV and I really appereciate your reply, but I doubt
> that I could simplify my code to make it small *enough* to fit in one
> post and not look too long.

The pont of the exercise of taking non-working code and trying to cut 
away parts that aren't part of the problem is to isolate where the 
problem is.  This is especially true in dynamic languages like Python, 
where problems usually consist of something not being what you expected 
it to be, but it's true in all other languages as well.

Even if it means creating a standalone program that's a simplified 
version of the particular logic that's failing, this is good.  It makes 
it easy for others to find where the problem is without having to tangle 
through your other (working) code.

But in my view this is only the side benefit.  The _real_ benefit is 
that a very significant fraction of the time, going through this 
exercise will actually help _you_ figure out your problem on your own. 
Taking a tangle of code that isn't working for reasons you don't 
understand and then pulling out threads to see where the problem is so 
you can show it to someone else to get help will usually allow _you_ to 
see where the problem was in the process.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   God said: "Let Newton be"; and all was light.
   -- Alexander Pope


From darthbob88 at gmail.com  Wed Feb 22 22:31:12 2006
From: darthbob88 at gmail.com (darthbob88 at gmail.com)
Date: 22 Feb 2006 19:31:12 -0800
Subject: "Temporary" Variable
Message-ID: <1140665472.203495.7570@g44g2000cwa.googlegroups.com>

Problem: I wish to run an infinite loop and initialize a variable on
each iteration. Sort of like, "Enter Data", test it, "No good!", "Next
Try?", test it, etc. What I've tried is simply while 1: var1 =
raw_input, test var1, then run through the loop again. What results is
var1 gets and keeps the first value it receives. If this is in the FAQ,
my apologies, I did not find it. Thank you in advance.



From sriramk at gmail.com  Sun Feb 19 15:43:51 2006
From: sriramk at gmail.com (Sriram Krishnan)
Date: Mon, 20 Feb 2006 02:13:51 +0530
Subject: editor for Python on Linux
In-Reply-To: <dtai6e$23m$2@ariane.blic.net>
References: <dtai6e$23m$2@ariane.blic.net>
Message-ID: <43F8D887.1020602@gmail.com>

Mladen Adamovic wrote:
> Hi!
> 
> I wonder which editor or IDE you can recommend me for writing Python 
> programs. I tried with jEdit but it isn't perfect.
> 

Check out http://wiki.python.org/moin/PythonEditors. I personally use Emacs

-- 
Sriram


From davidworley at gmail.com  Mon Feb  6 00:32:59 2006
From: davidworley at gmail.com (Dave)
Date: 5 Feb 2006 21:32:59 -0800
Subject: translating PHP to Python
In-Reply-To: <1139164228.608430.13120@g44g2000cwa.googlegroups.com>
References: <1139164228.608430.13120@g44g2000cwa.googlegroups.com>
Message-ID: <1139203979.623011.290430@f14g2000cwb.googlegroups.com>

So thanks, all for the help.

Turns out that the solution is simple enough, as are most solutions in
Python:

PHP:
parent::__construct(args)

does translate to the Python:
super(ParentClass, self).__init__(args)

The example, that of referencing an object's creator object (if that's
the technospecificalist terminosity) has to be done by passing a
reference to the creator object to the created object.

So:

class A(object):
    def create_child(self):
        self.child = B()
        self.child.do_stuff(self)

class B(object):
    def do_stuff(self, parent):
        self.parent = parent
        if self.parent.__class__.__name__ == 'A':
            print "I'm a child of an A!"
        else:
            print "Well, I'm a motherless child. Does that mean I can
kill Macbeth?"

(Bonus points for lame, contrived, and sort of offensive Shakespeare
reference)

The project I'm working on is a CSS preprocessor. Watch this space.
It's totally going to be famous.



From aleaxit at yahoo.com  Sun Feb 12 22:02:39 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 12 Feb 2006 19:02:39 -0800
Subject: Downloading Large Files -- Feedback?
References: <1139773494.245577.102870@g47g2000cwa.googlegroups.com>
	<1hanf3e.1j28qll1hnvr5qN%aleaxit@yahoo.com>
	<1139793676.885331.295390@g14g2000cwa.googlegroups.com>
	<1hanqts.1ebz9k41w8qll3N%aleaxit@yahoo.com>
	<1139798543.353098.280610@g44g2000cwa.googlegroups.com>
Message-ID: <1hanu4z.1os501a32vyqfN%aleaxit@yahoo.com>

mwt <michaeltaft at gmail.com> wrote:
   ...
> import urllib
> 
> def download_file(filename, URL):
>     f = urllib.urlretrieve(URL, filename, reporthook=my_report_hook)

If you wanted to DO anything with the results, you'd probably want to
assign to
    f, m = ...
not just f.  This way, f is the filename, m a message object useful for
metadata (e.g., content type).

Otherwise looks fine.


Alex


From nogradi at gmail.com  Fri Feb 10 06:20:59 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Fri, 10 Feb 2006 12:20:59 +0100
Subject: pythonic exec* spawn*
In-Reply-To: <barnu1li9c4vrldo6n4fd5f1uavhrdkfoa@4ax.com>
References: <mailman.1686.1139521339.27775.python-list@python.org>
	<lbinu19o3nkqn5elsn4dqbvoueonh93ral@4ax.com>
	<mailman.1693.1139531778.27775.python-list@python.org>
	<barnu1li9c4vrldo6n4fd5f1uavhrdkfoa@4ax.com>
Message-ID: <5f56302b0602100320l177dbe8ep184dbe2c6a17fc6a@mail.gmail.com>

> >> os.fork() does that (on Mac and Unix).
> >
> >Okay, but how?
>
> Sorry, fork() is implemented strictly on a 'need to know' basis :-)
>
> >It seems to me that if the process which issued os.fork() ends, then
> >the forked process also ends.
>
> No, no, they're not a quantum mechanic photon pair. Every process decides
> for itself if and when to end. As long as it's not signalled/killed, that
> is.
>
> >But the execute of longer( data ) should keep going even though the
> >original program ended. I'm pretty sure it's something basic and
> >probably I'm not aware of the right concepts and that's why I can't
> >find the right place to look in the docs.
>
> You can search for "daemonize".
>
> Here's a recipe:
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66012
>
> The concept is best explained in this book:
> http://www.kohala.com/start/apue.html

Okay, thanks a lot, I'll look into that.


From bpeng at rice.edu  Fri Feb 24 19:16:38 2006
From: bpeng at rice.edu (Bo Peng)
Date: Fri, 24 Feb 2006 18:16:38 -0600
Subject: Module written in C does not repond to Ctrl-C interruption.
In-Reply-To: <dtngoc$6og$1@news.sap-ag.de>
References: <dtnak6$aku$1@joe.rice.edu> <468qvoF9r91vU1@uni-berlin.de>
	<dtngoc$6og$1@news.sap-ag.de>
Message-ID: <dto7oo$48g$1@joe.rice.edu>

Daniel Dittmar wrote:
> 
> You could set up your own signal handler when entering the C extension. 
> This should abort the extension (tricky) and call the Python signal 
> handler.

This can be done under linux using things in signal.h but I am not
sure whether or not there is a portable way to do it (max, win32).
Does anybody know a quick way under windows?

Bo



From heikki at osafoundation.org  Tue Feb 21 14:10:01 2006
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Tue, 21 Feb 2006 11:10:01 -0800
Subject: RSA in python
In-Reply-To: <4e4a257e0602172240p2f4000eif2e34984850313e4@mail.gmail.com>
References: <mailman.2057.1140187795.27775.python-list@python.org>	
	<Q6-dnZ0YXf_7x2venZ2dnUVZ_tSdnZ2d@comcast.com>
	<4e4a257e0602172240p2f4000eif2e34984850313e4@mail.gmail.com>
Message-ID: <43FB6589.9000907@osafoundation.org>

Abhisek Datta wrote:
> -----BEGIN RSA PUBLIC KEY-----
> MIGJAoGBALxi3tGXlSwRgn7/Km6mTSge+5ijQgIn3GvnZOeYyOo1DkubVtTaFj26
> GWtJo43MEe1a5UlWKJEOpbKVCr4AASfFj8YmmRewH4SXdZ+w1Bad8amyzL2h8F7J
> wJojOnocSs6xDE7o86CpZRUlojBefanMdCpu074QFktE63OD1zBBAgMBAAE=
> -----END RSA PUBLIC KEY-----
> 
> Traceback (most recent call last):
[...]
> M2Crypto.RSA.RSAError: no start line

The files in M2Crypto tests directory don't have any files that have
"BEGIN RSA PUBLIC KEY" in them - haven't checked if this is legal or not.

However, plain OpenSSL does not like that file either:

$ openssl rsa -in rsa_heikki.pem -pubin
3440:error:0906D06C:PEM routines:PEM_read_bio:no
startline:pem_lib.c:644:Expecting: PUBLIC KEY

$ openssl rsa -in rsa_heikki.pem -check
2140:error:0906D06C:PEM routines:PEM_read_bio:no
startline:pem_lib.c:644:Expecting: ANY PRIVATE KEY

If I take out the "RSA " part from the delimiter lines I get:

$ openssl rsa -in rsa_heikki2.pem -pubin
unable to load Public Key
3124:error:0D0680A8:asn1 encoding routines:ASN1_CHECK_TLEN:wrong
tag:tasn_dec.c:
1282:
3124:error:0D07803A:asn1 encoding routines:ASN1_ITEM_EX_D2I:nested asn1
error:ta
sn_dec.c:374:Type=X509_ALGOR
3124:error:0D08303A:asn1 encoding
routines:ASN1_TEMPLATE_NOEXP_D2I:nested asn1 e
rror:tasn_dec.c:743:Field=algor, Type=X509_PUBKEY
3124:error:0906700D:PEM routines:PEM_ASN1_read_bio:ASN1 lib:pem_oth.c:83:

$ openssl rsa -in rsa_heikki2.pem -check
unable to load Private Key
2304:error:0906D06C:PEM routines:PEM_read_bio:no start
line:pem_lib.c:644:Expect
ing: ANY PRIVATE KEY


My suggestion would be to ask on the openssl-users list.

-- 
  Heikki Toivonen


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From tjreedy at udel.edu  Tue Feb 21 11:48:05 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 21 Feb 2006 11:48:05 -0500
Subject: Augmented assignment
References: <dte88n$568$2@home.itg.ti.com><mailman.2208.1140504408.27775.python-list@python.org>
	<1140506094.387829.60890@g14g2000cwa.googlegroups.com>
Message-ID: <dtfg84$613$1@sea.gmane.org>


<bonono at gmail.com> wrote in message 
news:1140506094.387829.60890 at g14g2000cwa.googlegroups.com...
>
> Terry Reedy wrote:
>> Program performance might be noticeable if 'x' is something like a.b.c.d
>> that takes some lookup time.  But again, I would use the += form for
>> readability without testing run time.
>
> Would x=x + 1 be more readable, regardless of the background(whether
> being introduced to the += form in some other language like C before) ?

To *me*,

able.baker.charles.delta += 1

is more easily read than

able.baker.charles.delta = able.baker.charles.delta +1

because it is clear that there is one and only one attribute involved, 
being updated in place, whereas the latter might have been

able.baker.charles.delta = able.baker.charley.delta +1

Therefore, as I said originally *I* would use the += form.

Terry Jan Reedy





From peter at engcorp.com  Sun Feb 19 08:13:28 2006
From: peter at engcorp.com (Peter Hansen)
Date: Sun, 19 Feb 2006 08:13:28 -0500
Subject: commenting out blocks of code
In-Reply-To: <dt7pd4$v1l$1@sea.gmane.org>
References: <20060217231846.87613.qmail@web36708.mail.mud.yahoo.com>	<mailman.2077.1140221554.27775.python-list@python.org>	<pan.2006.02.18.01.36.05.856023@REMOVETHIScyber.com.au>
	<dt7pd4$v1l$1@sea.gmane.org>
Message-ID: <dt9qtt$1lq$1@sea.gmane.org>

Steve Holden wrote:
> Steven D'Aprano wrote:
>>On Fri, 17 Feb 2006 19:12:01 -0500, Peter Hansen wrote:
>>>Scite, for example, lets me selected a block and hit Ctrl-Q to either 
>>>comment or uncomment the block.
>>>(It does this by prefixing each line 
>>>with #~ instead of just #, which allows it to detect when a line is 
>>>already so commented and reverse the operation.)  
>>
>>It is *easy* to detect when a line is already commented. It starts with a
>>#. The ~ is superfluous.
>>
>>Commenting and uncommenting should be two different commands: the whole
>>point of nested comments is that it allows you to comment a block of text
>>which may already contain comments. Having one command do both commenting
>>and uncommenting according to the presence or absence of semantic clues in
>>the text is a recipe for failure ("No you stupid computer, I want to
>>COMMENT that block, not uncomment it!!!").
>>
>>Imagine if your text editor used cntl-C for both copy and paste, somehow
>>guessing whether you wanted to copy selected text or paste over it
>>according to some subtle clue in the text itself. Wouldn't that be fun?
> 
> I agree that's a less-than-sensible feature implementation.

I submit that Steve and Steven (neither of whom has apparently even 
*used* this feature of Scite before criticizing it so strongly), should 
consider whether in actual practice something like this might not be 
much more effective than they can apparently imagine.

I'm strongly critical of many features of most editors, and thus use 
very few of them, and I also happen to have a solid background in GUI 
design and ergonomics.  I'm also a heavy user of Scite, and have found 
it readily accepted amongst the groups of programmers with whom I've worked.

I and my team have found the Ctrl+Q feature of Scite to be very 
sensible, highly effective and useful, and in fact *better* than 
alternatives that we've used before in other editors.

Kudos to Neil for having the (apparently) unusual design sense to think 
of it and implement it!

So there.  Harumph.  :-)

-Peter



From k.suess at gmx.net  Tue Feb 21 05:54:50 2006
From: k.suess at gmx.net (Katja Suess)
Date: Tue, 21 Feb 2006 11:54:50 +0100
Subject: odt -> pdf
Message-ID: <43FAF17A.70706@gmx.net>

Hi
Cause Google didn't find the Info I was trying to find her my post.
Is PyUNO still _the_ Tool to create PDFs out of OpenOffice docs (odt, not swx) ?
Do other tools exist?
Do you prefer generatingp PDFs using the XML-Strukture of odt files?
Regards,
Katja



From carsten at uniqsys.com  Thu Feb  9 08:36:38 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Thu, 09 Feb 2006 08:36:38 -0500
Subject: email questions
In-Reply-To: <12llu1ti1o7s7q477apo7idqod1e0qd4dr@4ax.com>
References: <FDD3FDB3-EF9C-4F85-9599-37AF617DED18@pacbell.net>
	<1139420846.28143.41.camel@dot.uniqsys.com>
	<mailman.1614.1139424578.27775.python-list@python.org>
	<12llu1ti1o7s7q477apo7idqod1e0qd4dr@4ax.com>
Message-ID: <1139492198.31416.13.camel@dot.uniqsys.com>

On Thu, 2006-02-09 at 00:50, Dennis Lee Bieber wrote:
> On Wed, 8 Feb 2006 10:49:27 -0800, Scott Frankel <leknarf at pacbell.net>
> declaimed the following in comp.lang.python:
> 
> 
> > 	
> > 	mail.<ispname>.net
> 
> 	Not sure why you feel you need to hide it -- I'm presuming it is the
> same ISP in your email address...
> 
> 	However, I'm currently finding a dead access to it...
> 
> C:\Documents and Settings\Dennis Lee Bieber>tracert smtp.pacbell.net
> Unable to resolve target system name smtp.pacbell.net.
> 
> C:\Documents and Settings\Dennis Lee Bieber>tracert mail.pacbell.net
> 
> Tracing route to mail.pacbell.net [207.115.57.20]
> over a maximum of 30 hops:
> 
>   1     1 ms    <1 ms    <1 ms  192.168.1.1
>   2    17 ms    13 ms    14 ms  user-11fa401.dsl.mindspring.com
> [66.245.16.1]
>   3    13 ms    13 ms    15 ms cor02-vl-10.ca-sanfranc0.ne.earthlink.net
> [209.165.103.65]
>   4    16 ms    13 ms    16 ms
> bor01-ge-6-1.ca-sanfranc0.ne.earthlink.net [209.165.103.17]
>   5    22 ms    22 ms    22 ms
> bor02-so-3-1.ca-pasadena0.ne.earthlink.net [209.165.109.154]
>   6    23 ms    27 ms    31 ms
> bor01-ge-1-1-0.ca-losangel4.ne.earthlink.net [209.165.107.182]
>   7    28 ms    21 ms    22 ms  ex1-g8-1s1.eqlaca.sbcglobal.net
> [206.223.123.79]
>   8    24 ms    22 ms    23 ms  ex2-p3-0.eqlaca.sbcglobal.net
> [151.164.191.226]
>   9    25 ms    24 ms    24 ms  bb1-p6-0.crrvca.sbcglobal.net
> [151.164.41.34]
>  10    23 ms    24 ms    27 ms  core2-p4-0.crrvca.sbcglobal.net
> [151.164.41.1]
>  11    58 ms    61 ms    59 ms  core2-p3-0.crhstx.sbcglobal.net
> [151.164.241.125]
>  12    88 ms    89 ms    81 ms  core1-p9-0.cratga.sbcglobal.net
> [151.164.191.192]
>  13    83 ms    82 ms    84 ms  core2-p1-0.cratga.sbcglobal.net
> [151.164.241.82]
>  14    82 ms    82 ms    83 ms  core2-p6-0.crhnva.sbcglobal.net
> [151.164.41.206]
>  15    88 ms    89 ms    90 ms  core2-p3-0.crnyny.sbcglobal.net
> [151.164.188.197]
>  16    91 ms    88 ms    89 ms  bb2-p3-0.nycmny.sbcglobal.net
> [151.164.240.221]
>  17    88 ms    90 ms    87 ms  ded2-g8-3-0.nycmny.sbcglobal.net
> [151.164.41.181]
>  18    93 ms    90 ms    98 ms  66.10.112.6
>  19     *        *        *     Request timed out.
>  20     *        *        *     Request timed out.
>  21     *        *        *     Request timed out.
>  22     *        *        *     Request timed out.
>  23     *        *        *     Request timed out.

This does not necessarily mean that the server is down. Routers can
filter traceroute and ping. Telnet to mail.pacbell.net on port 25 works
just fine. If the server had been down, the OP would not have gotten
"connection refused", he would have gotten a connection timeout.

The OP's problem is most likely that he's doing this:

s = smtplib.SMTP("mail.pacbell.net")  # This already connects s
s.connect() # This reconnects s to localhost and is refused

when he should do this:

s = smtplib.SMTP()  # make an unconnected SMTP instance
s.connect("mail.pacbell.net") # and connect it.

or simply this:

s = smtplib.SMTP("mail.pacbell.net")

-Carsten




From steve at REMOVETHIScyber.com.au  Sun Feb 19 03:00:51 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sun, 19 Feb 2006 19:00:51 +1100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
Message-ID: <pan.2006.02.19.08.00.50.166399@REMOVETHIScyber.com.au>

On Sat, 18 Feb 2006 23:35:27 -0600, DH wrote:

> > I'm wondering if someone can explain to me please what it is about
> > Python that is so different from Lisp that it can't be compiled into
> > something as fast as compiled Lisp?  From this above website and
> > others, I've learned that compiled Lisp can be nearly as fast as
> > C/C++, so I don't understand why Python can't also eventually be as
> > efficient? Is there some *specific* basic reason it's tough?  Or is it
> > that this type of problem in general is tough, and Lisp has 40+ years
> > vs Python's ~15 years?
>
> It is by design. 

You make it sound like Guido sat down to design a language and
deliberately put "Slow" first on his list of desired attributes. Why such
a negative tone to your post?

Python is not slow by design. Python is dynamically typed by design, and
relative slowness is the trade-off that has to be made to give dynamic
types.

The Python developers have also done marvels at speeding up Python since
the early days, with the ultimate aim of the PyPy project to make Python
as fast as C, if not faster. In the meantime, the question people should
be asking isn't "Is Python fast?" but "Is Python fast enough?".

> Python is dynamically typed.  It is essentially an 
> interpreted scripting language like javascript or ruby or perl, although 
> python fans will be quick to tell you python is compiled to byte code. 

You make it sound like Python fans are bending the truth. That Python
compiles to byte-code is an objective fact which can be learnt by anyone,
not just "Python fans". In that regard, Python is closer to Java than Perl
or Javascript. Only without the slow startup time of the JRE.


> They'll also be quick to tell you:
> -python has true closures (although nothing like ruby's blocks)

They're also nothing like Pascal's with statements either. Why make the
comparison with Ruby's blocks when the original poster is comparing Python
to Lisp?


> -is beginner friendly (despite being case sensitive and 3/4==0, for
> example)

Case sensitivity isn't beginner unfriendly. It is sloppy thinker
unfriendly. Whether you have been programming for thirty days or thirty
years, if you don't know the difference between foo and FOO you have a
serious problem. As they say, case is the difference between "I helped my
Uncle Jack off a horse" and "I helped my uncle jack off a horse."

As for the difference between integer division and true division, yes,
that was an unfortunate design decision. Fortunately it is being rectified
in the least painful way possible.


> -is not, in fact, slow at all (despite benchmarks as you noted showing
> otherwise).

I've asked this question before, but obviously there is a particular
mindset that just doesn't get it. Slow compared to what? Slow to do what?

For those who don't understand the difference between "faster" and "fast
enough", perhaps a simple analogy will bring enlightenment. For most
people, under most circumstances, an ordinary car (top speed around 75
mph or so) is fast enough, more convenient, and much better value for
money than the significantly faster F-15 fighter plane (top speed around
1850 mph).

On modern hardware, for the vast majority of applications, the execution
speed of the language is not the limiting factor. I/O or the algorithm is
usually the limiting factor. "Change your algorithm" is often better
advice than "change your language". 

That's not to say that Python isn't objectively SLOWER (note the
relative term, not absolute) than some languages. But execution speed is
rarely the most important factor in choice of a language.

For those tasks that language speed is a limiting factor (say, writing
devise drivers, operating systems, and similar), Python may not be fast
enough. But they are the exception rather than the rule, and there are no
shortage of ways around that: Psycho, C extensions, or even "choose
another language". 



-- 
Steven.



From lcrees at gmail.com  Wed Feb  8 12:17:13 2006
From: lcrees at gmail.com (L.C. Rees)
Date: 8 Feb 2006 09:17:13 -0800
Subject: Mixing custom __setattr__ method and properties in new style
	classes
In-Reply-To: <1139418477.572639.154300@z14g2000cwz.googlegroups.com>
References: <1139418477.572639.154300@z14g2000cwz.googlegroups.com>
Message-ID: <1139419033.608688.147710@g14g2000cwa.googlegroups.com>

I see the error: the get and set properties are inverted. Now it works.



From gaz082 at gmail.com  Thu Feb 16 10:36:18 2006
From: gaz082 at gmail.com (Gaz)
Date: 16 Feb 2006 07:36:18 -0800
Subject: Sendmail "ok" signal?
Message-ID: <1140104177.989381.292550@z14g2000cwz.googlegroups.com>

Hey. I looked at the Sendmail help and did not find a property where i
can get an "ok" signal when the email is finally sent. I need something
like that to show a "Processing, please stand by" screen when the
server is sending an email, and when the email is out, another screen
appears with an "Email sent" message.

Do you know an alternative to the "ok" from the sendmail to do this?



From nibiery at hotmail.com  Mon Feb 20 19:28:28 2006
From: nibiery at hotmail.com (Ingrid)
Date: 20 Feb 2006 16:28:28 -0800
Subject: getting started, .py file
In-Reply-To: <1140476484.581881.230170@o13g2000cwo.googlegroups.com>
References: <1140471172.783876.80400@g14g2000cwa.googlegroups.com>
	<mailman.2186.1140473000.27775.python-list@python.org>
	<1140476484.581881.230170@o13g2000cwo.googlegroups.com>
Message-ID: <1140481708.344495.198340@g43g2000cwa.googlegroups.com>

I found it! I needed to set sys.path ("sys.path.append("c:\\documents
and settings\\my documents\\ingrid")")

Ingrid



From bronger at physik.rwth-aachen.de  Mon Feb 20 08:30:26 2006
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Mon, 20 Feb 2006 14:30:26 +0100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com>
	<mailman.2160.1140440898.27775.python-list@python.org>
Message-ID: <878xs6b1jh.fsf@wilson.homeunix.com>

Hall?chen!

Carl Friedrich Bolz <cfbolz at gmx.de> writes:

> Torsten Bronger wrote:
>
>> [...]
>>
>> My definiton would be that an interpreted language has in its
>> typical implementation an interpreting layer necessary for
>> typical hardware.  Of couse, now we could discuss what is
>> "typical", however, in practice one would know it, I think.  In
>> case of Python: CPython and all important modern processors.
>
> Well, if we take any modern Intel/AMD chip (which could be
> described as "typical), a C++ program would fit the "interpreted"
> definition, since the processor does not execute the machine code
> directly but rather breaks it down into smaller microcode
> instruction -- a process that could be described as intepretation.

This is an interpreting layer within the hardware, not necessary for
it.

> Another problem with the definition: what would you call a C++
> program that is running on top of an emulator?

Compiled.  I said "necessary for typical hardware".

> [...] I think that the disctinction between "interpreted" and
> "compiled" (whatever both means) is really just not sensible at
> all.

The question is whether such features have to be considered when
choosing the right tool for a task.  I think, yes.  Whereas C is
very close to the fastest code you can get because it works very
closely to how the machine itself works, Python can well be one or
one and a half orders of magnitude farther away.  No problem since
you can get the best of both worlds but: You must be aware of it.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus            ICQ 264-296-646


From NethanO at SPdogdiniAM.com  Fri Feb 17 13:25:22 2006
From: NethanO at SPdogdiniAM.com (EShames)
Date: Fri, 17 Feb 2006 18:25:22 GMT
Subject: Print a PDF transparently
In-Reply-To: <1140184955.674138.275010@o13g2000cwo.googlegroups.com>
References: <1140184955.674138.275010@o13g2000cwo.googlegroups.com>
Message-ID: <myoJf.6521$Zl1.4273@twister.nyroc.rr.com>

On 2/17/2006 9:02 AM, Daniel Crespo wrote:
> Hi to all,
> 
> I want to print a PDF right from my python app transparently. With 
> "transparently" I mean that no matter what program handles the print 
> petition, the user shouldn't be noticed about it.
> 
> For example, when I want to print a PDF, Adobe Acrobat fires and keep
>  opened. This is what I don't want to happen (and I thing there are a
>  lot of people who want this too). So I just want to send the PDF to
> the right handler and print it. That's all.
> 
> I've seen some things like Adobe's Postscript driver that can read a 
> PDF, or Ghostscript, but I still don't know how to use it.
> 
> Any help for printing a PDF transparently?
> 
> Thank you
> 
> Daniel
>

You may find that RedMonEE is a useful piece to your puzzle. I find it 
to be stable and quite invaluable.

http://www.is-foehr.de/
> RedMon - Redirection Port Monitor EE
> 
> Transparent PostScript printing from Windows NT, W2K and XP. Overview
> 
> 
> The RedMon EE port monitor redirects a special printer port to a
> program. RedMon EE is commonly used with Ghostscript and a
> non-PostScript printer to emulate a PostScript printer.
> 
> RedMon EE can be used with any program that accepts data on standard
> input.
> 
> Using RedMon EE you create a redirected printer port. If you connect
> a Windows printer driver to the redirected printer port, all data
> sent to the redirected port will be forwarded by RedMon to the
> standard input of a program. The output of this program can be sent
> to different printer port, or the program can generate whatever
> output it desires.
> 
> A PostScript Windows printer redirected to a RedMon port can shared
> on a network. When this printer is configured to use Ghostscript and
> a non-PostScript printer, it appears as a PostScript printer to other
> network clients.


From carsten at uniqsys.com  Wed Feb 15 15:16:53 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 15 Feb 2006 15:16:53 -0500
Subject: Linux application in python
In-Reply-To: <1140032096.691138.286750@z14g2000cwz.googlegroups.com>
References: <1140032096.691138.286750@z14g2000cwz.googlegroups.com>
Message-ID: <1140034613.22048.102.camel@dot.uniqsys.com>

On Wed, 2006-02-15 at 15:02, sundarashiv at gmail.com wrote:
> Hi all ,
> 
> I have a linux application that needs to run on a python interpreter

Why does it "need to" run "on" a python interpreter?

> .So what is the best way to have the same functionalities provided by
> "C" to be implemented in python .

1) Rewrite the functionality in python.
2) Separate the functionality into a library and write a python
extension to call into the library (or use ctypes to call into the
library without writing an extension module)

Better solutions may become apparent once you provide more details about
your needs.

-Carsten




From bearophileHUGS at lycos.com  Tue Feb 28 06:00:20 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 28 Feb 2006 03:00:20 -0800
Subject: sort one list using the values from another list
In-Reply-To: <4403b3c3_2@newspeer2.tds.net>
References: <mailman.2447.1140969980.27775.python-list@python.org>
	<4401d314_2@newspeer2.tds.net> <dtula8$r30$1@news.yaako.com>
	<dtv12h$dl2$1@wake.carmen.se> <du0bfc$7lj$1@news.yaako.com>
	<4403b3c3_2@newspeer2.tds.net>
Message-ID: <1141124420.079243.41470@i39g2000cwa.googlegroups.com>

>_ is just a plain variable name in Python. It is sometimes when a variable is needed to receive a value that won't be used.<

Like in some other interactive systems (Mathematica, etc, but with a
different syntax) _ has a use in the interactive shell, it contains the
last unassigned result:

>>> a = 2 * 5
>>> _
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
NameError: name '_' is not defined
>>> 2 * 5
10
>>> _
10

Bye,
bearophile



From s323 at mail.ru  Tue Feb 14 06:29:44 2006
From: s323 at mail.ru (Sergey)
Date: Tue, 14 Feb 2006 14:29:44 +0300
Subject: file names longer than MAX_PATH under Windows 2003
Message-ID: <dssev8$tr5$1@news.rtcomm.ru>

Hello.

I try to open file with pathname length 282 bytes:
E:\files\..................\something.dat

On MSDN (http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/fs/naming_a_file.asp) described method to access 
files with path length
up to 32000 bytes: just add prefix \\?\ to file name.
But when I try to pass prefixed name to file(), I get the same result as when I don't add the prefix: file not found. May be Python 
just doesn't support long unicode filenames?
Is there way to open such files?




From fredrik at pythonware.com  Sun Feb 12 11:30:35 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 12 Feb 2006 17:30:35 +0100
Subject: Can I get the 8bit-string representation of any unicode string
References: <1139757073.364694.176200@g14g2000cwa.googlegroups.com><mailman.1783.1139759324.27775.python-list@python.org>
	<1139760950.777963.245250@g47g2000cwa.googlegroups.com>
Message-ID: <dsnnrd$q1i$1@sea.gmane.org>

wanghz at gmail.com wrote

> I may misunderstood it.  I will think about it carefully.
>
> By the way, does python has a interface, just like iconv in libc for
> C/C++?  Or, how can I convert a string from a encoding into another
> one?

if b is an 8-bit string containing an encoded unicode string,

    u = b.decode(encoding)

or

    u = unicode(b, encoding)

gives you a unicode string.  to encode the unicode string back to another
byte string, use the encode method.

    b = u.encode(encoding)

</F>





From kay.schluehr at gmx.net  Fri Feb 24 11:56:31 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 24 Feb 2006 08:56:31 -0800
Subject: Unintended inheritance
In-Reply-To: <1hb23fp.icnshja9l7hhN%aleaxit@yahoo.com>
References: <1140461082.972776.28090@g14g2000cwa.googlegroups.com>
	<1hb23fp.icnshja9l7hhN%aleaxit@yahoo.com>
Message-ID: <1140800191.347266.296770@j33g2000cwa.googlegroups.com>


Alex Martelli wrote:
> Kay Schluehr <kay.schluehr at gmx.net> wrote:
>    ...
> > To prevent unintended inheritance C# introduced a relatively complex
> > contract semantics using three modifiers virtual, override and new. Is
> > this issue serious for Python programmers, in particular for those
> > working in larger projects ( Twisted, Zope ... ) or is it not? If not,
> > why not?
>
> I have not found it to be a particular problem (in C++ as well as in
> Python or Java), because subclasses' coupling to superclasses is too
> strong anyway to expect everything to just work smoothly when the
> superclass's interface is changed, and even the most semidecent of
> unittests easily catch this specific problem -- obviously all subclasses
> must be recompiled and tested when a superclass's interface is changed
> in any way. Other kinds of coupling are subtler and more problematic
> (not so much in Python as in C++, I'd say, but it's arguable).
>
> Lakos' book on large-scale design for C++ has good advice on dependency
> control, which boils down to (WAY oversimplifying): each component must
> expose to all others only unchanging abstract interfaces; anything
> depending on anything beyond an abstract interface (as a subclass must)
> must be in the same component as what it depends on.  Inheritance, while
> way handy, introduces too-strong coupling (==dependencies) to be freely
> used across independently developed and maintained components; and any
> change in interface (I would argue, in fact, most any change in
> PROTOCOL, which is a stronger constraint) must occur on new, separate
> interfaces (which may well extend the existing ones, of course).
>
> Yes, frameworks (separately developed, large components which are
> *supposed* to be used via inheritance by separately developed and
> maintained components) are quite problematic in terms of Lakos' rules
> and guidelines (if you're at all interested in these subjects you should
> surely read Lakos' book, anyway: no summary can do it justice). But I
> believe (with no real-world experience of C#, admittedly) that they will
> remain essentially just as problematic with C#'s complex rules -- a new
> release of a framework, which changes protocols, will still be able to
> break uncountable independently developed and maintained smaller
> components, and the fact that the compiler catches the breakage (if, of
> course, the other components DO get recompiled) rather than relying on
> semidecent unittests is scant consolation -- there's still no bound to
> the amount of work that may be needed to repair the wreckage.
>
>
> Alex

Interesting statement, Alex, as always. I've found an interview with
Anders Hejlsberg from 2003 on Artima where he defended his C# design
decisions with regard to the problem of "unintended inheritance":

http://www.artima.com/intv/nonvirtual.html

A strange twist is Anders exemplification of "pragmatism" with which
Bruce Eckel seems to agree emphatically. I would indeed assume the
exact opposite: laisser faire by pragmatists and expressive control by
academics. I'm also not sure what I should think about the confusing
use of the word "versioning" that is placed concretely by Bruce Eckel (
"DLL hell" ) but more metaphorically by Anders. His remarks about the
difference of ingoing and outgoing interfaces are interesting but
remain a little underdeveloped. 

Kay



From steve at holdenweb.com  Tue Feb  7 07:16:28 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 07 Feb 2006 07:16:28 -0500
Subject: python
In-Reply-To: <1139310431.908915.299400@g43g2000cwa.googlegroups.com>
References: <20060206222757.3277.qmail@web25701.mail.ukl.yahoo.com>	<mailman.1539.1139306627.27775.python-list@python.org>
	<1139310431.908915.299400@g43g2000cwa.googlegroups.com>
Message-ID: <dsa32u$l1h$1@sea.gmane.org>

Salvatore wrote:
> A new OS in Python :
> http://unununium.org/introduction  :-)
> 
That page includes:

"""
Is the project dead?

Maybe. Very little code was written in 2005. 2006 so far does not look 
better. What code has been written isn't very useful. ...
"""

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From felipe.lessa at gmail.com  Sat Feb 11 15:14:02 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sat, 11 Feb 2006 18:14:02 -0200
Subject: Clearing the screen
In-Reply-To: <1139688262.046667.296940@g14g2000cwa.googlegroups.com>
References: <1139688262.046667.296940@g14g2000cwa.googlegroups.com>
Message-ID: <1139688842.9328.13.camel@kenshin>

Em S?b, 2006-02-11 ?s 12:04 -0800, mwt escreveu:
> I'm doing some python programming for a linux terminal (just learning).
> When I want to completely redraw the screen, I've been using
> os.system("clear")
> This command works when using python in terminal mode, and in IDLE.
> However, when running a little .py file containing that command, the
> screen doesn't clear. 
> 
> What to do?

There's one escape sequence that does what you want.

I am *not* sure if this solution is the correct one, but:

$ clear | hd
00000000  1b 5b 48 1b 5b 32 4a                              |.[H.[2J|
00000007
$ python
Python 2.3.5 (#2, Nov 20 2005, 16:40:39)
[GCC 4.0.3 20051111 (prerelease) (Debian 4.0.2-4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> print
chr(0x1b)+chr(0x5b)+chr(0x48)+chr(0x1b)+chr(0x5b)+chr(0x32)+chr(0x4a),
>>> # Clears the screen!

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From n.estner at gmx.de  Thu Feb  2 19:32:21 2006
From: n.estner at gmx.de (n.estner at gmx.de)
Date: 2 Feb 2006 16:32:21 -0800
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<donn-C3B8DF.14535302022006@gnus01.u.washington.edu>
Message-ID: <1138926741.052843.169270@z14g2000cwz.googlegroups.com>

>    write(sys.stdin, split(read(open(file, 'r')))[0])

So, if I got you right, the interpreter would have to interpret this
line like this:
1. Evaluate the first parameter of the first function (sys.stdin)
2. Look up the attribute "write" in this object
3. evaluate the first parameter of the split function ->
4. evaluate the first parameter of the read function ->
5. evaluate file (I guess this is a local string variable?)
6. try attribute lookup "open" on the string
7. fail -> call the global "open" function
8. lookup "read" in that object, call it
9. attribute lookup "split" on the returned object
10. call __getitem__(0)
11. pass the parameters to the write function from (1)

Is this correct?
My main problems are that you have to "guess" at step 6/7, and that the
order of evaluation makes me a little dizzy ;-) Also, member functions
seem to "shadow" global ones, what if I wanted to use some global
"split" function I've written myself instead of the string's one. If I
was mean, I'd ask you what this one does:
  class A:
    def test(self, this): return 1
  class B:
    def test(this, self): return 2
  test(self=A(), this=B())

The current call syntax at least can be read from left-to-right, and
you always know whether you call a member function or a global one.



From tim.hochberg at ieee.org  Sun Feb 19 18:28:12 2006
From: tim.hochberg at ieee.org (Tim Hochberg)
Date: Sun, 19 Feb 2006 16:28:12 -0700
Subject: number ranges (was Re: Matlab page on scipy wiki)
In-Reply-To: <eV4Kf.152$XZ3.31816@news20.bellglobal.com>
References: <e86a5fd00602131854s73191cbbu742d4434ad074908@mail.gmail.com>	<1139945386.3346.38.camel@pc1.cole.uklinux.net>	<43F8D881.5030804@sympatico.ca>
	<eV4Kf.152$XZ3.31816@news20.bellglobal.com>
Message-ID: <43F8FF0C.50908@ieee.org>

Colin J. Williams wrote:

>>
>>It would be good if the range and slice could be merged in some way,
>>although the extended slice is rather complicated - I don't understand it.
>>
>>   The semantics for an extended slicing are as follows. The primary
>>   must evaluate to a mapping object, and it is indexed with a key that
>>   is constructed from the slice list, as follows. If the slice list
>>   contains at least one comma, the key is a tuple containing the
>>   conversion of the slice items; otherwise, the conversion of the lone
>>   slice item is the key. The conversion of a slice item that is an
>>   expression is that expression. The conversion of an ellipsis slice
>>   item is the built-in |Ellipsis| object. The conversion of a proper
>>   slice is a slice object (see section section 4.2 The standard type
>>   hierarchy <http://www.network-theory.co.uk/docs/pylang/ref_30.html>)
>>   whose |start|, |stop| and |step| attributes are the values of the
>>   expressions given as lower bound, upper bound and stride,
>>   respectively, substituting |None| for missing expressions.
>>
>>[source: http://www.network-theory.co.uk/docs/pylang/ref_60.html]
>>
>>The seems to be a bit of a problem with slicing that needs sorting out.
>>
>>The syntax for a slice list appears to allow multiple slices in a list:
>>
>>   extended_slicing     ::=     primary <primaries.html#tok-primary> "["
>>   slice_list <slicings.html#tok-slice_list> "]"
>>   slice_list     ::=     slice_item <slicings.html#tok-slice_item> (","
>>   slice_item <slicings.html#tok-slice_item>)* [","]
>>
>>but the current interpreter reports an error:
>>
>>    >>> a= range(20)
>>    >>> a[slice(3, 9, 2)]
>>   [3, 5, 7]
>>    >>> a[slice(3, 9, 2), slice(5, 10)]
>>   Traceback (most recent call last):
>>     File "<interactive input>", line 1, in ?
>>   TypeError: list indices must be integers
>>    >>>
>>

Extended slicing has nothing to do with lists. All that gobbeldy gook is 
trying to tell you is what the interpreter does with O[1:2:3, 4:5:6] 
where O is some arbitrary object. What it does is:

O[1:2:3, 4:5:6] == O[slice(1,2,3), slice(4,5,6)]
                 == O.__getitem__((slice(1,2,3), slice(4,5,6)))

In the case of python lists, __getitem__ doesn't support multiple slice 
arguments. However, you are free to define your own types which do 
support multiple slices.

This type of slicing was added to support Numeric originally and as far 
as I know is still only really used in Numeric and its successors 
Numarray and Numpy. Since this was originally posted to the numpy list I 
assume you are familiar with multidimensional indexing of arrays -- that 
is extended slicing in action.

If you really want to learn about it, and for most people it's 
unnecessary although perhaps entertaining, play with the following class:


class ExtendedSlicingDemo(object):
     def __getitem__(self, key):
         return key

esd = ExtendedSlicingDemo()

print esd[1:2:3]
print esd[1:2:3, 3:4:5]
print esd[1:2:3, ..., 3:4:5]
#....

=>

slice(1, 2, 3)
(slice(1, 2, 3), slice(3, 4, 5))
(slice(1, 2, 3), Ellipsis, slice(3, 4, 5))

-tim



From aleaxit at yahoo.com  Mon Feb 20 12:12:39 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 20 Feb 2006 09:12:39 -0800
Subject: Quesion about the proper use of __slots__
References: <1140424508.393412.79140@o13g2000cwo.googlegroups.com>
	<43f9825e$0$4777$636a55ce@news.free.fr>
	<1140426860.033363.237150@o13g2000cwo.googlegroups.com>
Message-ID: <1hb1vq2.1ij7f8e1bx24u8N%aleaxit@yahoo.com>

Zefria <zefria at gmail.com> wrote:
   ...
> this special case I'm expecting each "carrier" to have up to 150
> fighters, and 3 to 5 carriers for each of the two teams, which comes
> out to be quite large.

The problem with the spread of email is that it reduces the number of
envelopes laying around, and thus makes it harder to do "back of the
envelopes" calculations (the key skill in engineering...).

With 10 carriers between the two teams, and 150 fighters/carrier, you're
dealing with 1500 fighters.  If you save 64 bytes per fighter (and I
don't think __slots__ will save quite that much), we're still talking
about less than 100,000 bytes -- peanuts.  __slots__ is unwarranted.


> Additionally, this program's purpose was to experiment with as many of
> the special methods as possible, so I suppose I'm on track so far.

__slots__ is not a method, so it falls outside that purpose as stated.


Alex


From tdelaney at avaya.com  Tue Feb 21 18:05:00 2006
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Wed, 22 Feb 2006 10:05:00 +1100
Subject: Python vs. Lisp -- please explain
Message-ID: <2773CAC687FD5F4689F526998C7E4E5F4DB97A@au3010avexu1.global.avaya.com>

Terry Reedy wrote:

>>> The the compiler is built into the VM as opposed to a separate tool
>>> (like Java) is just an implementation issue.

That was me, not Paul - careful with the attributions. Otherwise Paul
might think you were trying to ascribe some awful, inaccurate statement
to him ;)

> The presence of the exec statement and the eval function (which is
> used by the input statement) requires the runtime presence of the
> parser-compiler. Removing the latter disables the former features. 
> This is legitimite when not needed or when space is tight, but the
> result is no longer a full implementation.

True - but there's no reason that exec and eval couldn't hand off to a
python compiler to do the work. Failure to distribute the compiler would
mean then that exec and eval wouldn't work - but everything else would.

It's similar to why some projects need the JDK rather than the JRE -
they have to be able to compile things on the fly.

Tim Delaney


From feedme at foo.org  Fri Feb 17 03:53:46 2006
From: feedme at foo.org (Wojciech Pawlikowski)
Date: Fri, 17 Feb 2006 09:53:46 +0100
Subject: restricted mode (2.4.2)
Message-ID: <dt42ve$1224$1@news.4web.pl>

Hey,
I work on some project where main part (core) is coded in C
(for speed) and the rest is in Python. Python API is used
to launch python modules without using any exec() system()
calls (thread safe). During debugging I found that
many of Python modules fails to work because restricted mode:

Traceback (most recent call last):
   File "../modules/scan/dns_forward.py", line 167, in scan_element
     d = DNSForward(domainname)
   File "../modules/scan/dns_forward.py", line 20, in __init__
     self.__r = dns.resolver.Resolver()
   File "/usr/lib/python2.4/site-packages/dns/resolver.py", line 270, in 
__init__
     self.read_resolv_conf(filename)
   File "/usr/lib/python2.4/site-packages/dns/resolver.py", line 295, in 
read_resolv_conf
     f = open(f, 'r')
IOError: file() constructor not accessible in restricted mode

Is there any way to avoid this mode ?

-- 
___________________________________________________________________
* Wojciech Pawlikowski  :: <wojtekp AT gmail.com> ::  GG: 4155781 *
* http://www.knockdownhc.com   ||  http://www.kingofthehillhc.com *
*      "Loved by a few, Hated by many, But respected by ALL"      *


From max at alcyone.com  Mon Feb 13 23:52:28 2006
From: max at alcyone.com (Erik Max Francis)
Date: Mon, 13 Feb 2006 20:52:28 -0800
Subject: how do you pronounce 'tuple'?
In-Reply-To: <dsr2f7$8l9$1@reader2.panix.com>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<mailman.1857.1139863723.27775.python-list@python.org>
	<Wj6If.1606$No6.38150@news.tufts.edu> <dsqtq7$mju$1@online.de>
	<dsr2f7$8l9$1@reader2.panix.com>
Message-ID: <cLmdnXPWG5yR_2zenZ2dnUVZ_tmdnZ2d@speakeasy.net>

Roy Smith wrote:

> Peter Maas  <peter.maas at somewhere.com> wrote:
>>Latin             n-tuple
>>---------------------------
>>...               ...
>>triplex           triple
>>duplex            duple
>>simplex           simple
> 
> Would a 9-tuple be a nipple?

We don't talk about that anymore since the Incident.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   Society attacks early when the individual is helpless.
   -- B.F. Skinner


From iddw at hotmail.com  Mon Feb 20 11:47:28 2006
From: iddw at hotmail.com (Dave Hansen)
Date: Mon, 20 Feb 2006 10:47:28 -0600
Subject: Python 3000 deat !? Is true division ever coming ?
References: <1139810036.943598.229030@g47g2000cwa.googlegroups.com>
	<dt4pj8$o21$1@wake.carmen.se>
	<1140213665.105188.103450@o13g2000cwo.googlegroups.com>
	<pan.2006.02.18.01.09.01.860632@REMOVETHIScyber.com.au>
Message-ID: <qirjv11de4u31goj7vn91aqseceu7a91ul@4ax.com>

Caution: bunny trail ahead.  Feel free to skip this message, as it
contains no useful content whatever...

On Sat, 18 Feb 2006 12:09:02 +1100 in comp.lang.python, Steven
D'Aprano <steve at REMOVETHIScyber.com.au> wrote:

[...]
>
>I've never even used Matlab. But I have a calculator. (Actually I have
>about half a dozen calculators.) In every single one of them, 1/2 gives
>0.5 instead of 0. I'm even capable of doing that calculation in my head.
>So I don't think true division is only in Matlab.

I have three calculators: an HP-48S, and HP-16C, and NeoCal on my
Palm.

On the HP-48S: 1 <Enter> 2 / -> 500.000000000E-3
On the HP-16C: 1 <Enter> 2 / -> 0 h (c)
On NeoCal:     1 <Enter> 2 / -> 500.e-3

Note: the (c) on the 16C indicates the "carry" bit was set, which the
16C does whenever the remainder of a division is nonzero.

Caveats: The result for each calculator depends on its "mode."  In
"programmer" mode, each calculator performs a truncating integer
division.  The 16C is in programmer mode by default.  The 48S is
almost never in programmer mode since I bought the 16C.  NeoCal goes
into programmer mode about 25% of the time I use it.  It was in
"Statistics" mode when I powered it up just now.

>
>
>> As you pointed out: the "true division" part of "Python3000" might be
>> one of the "scariest" and should therefore be pointed out already in
>> the tutorial !!  (It would look quite ugly to newcomers, though)

If you want ugly, consider Pascal.  The / operator could not perform
an integer divide, and a compile-time error was generated if you
attempted to use it with integer operands.  The integer divide
operator was 'div', e.g. "i = j div k"

>
>The tutorial shouldn't talk about Python3000 at all. What would be the
>point of that? The tutorial is there to teach about the way Python works
>now, not to make guesses and prediction about how it will work some time
>in the indefinite future.
>
>
>> Having said that:  I would vote against EVER introducing true division
>> as default - because it will just PISS too many (long time python)
>> people OFF. ;-)
>
>Do you realise that the reason true division was introduced into Python
>was because many long-time Python programmers requested it? So far from
>annoying them, it is a feature that most Python programmers are waiting
>for.

I am a relatively long-time user (since about 1999) of Python, but I
mainly program in C.  "True" division probably wouldn't p*ss me off
too bad, and I certainly wouldn't have a problem with new scripts I
wrote.  But if it broke old scripts, I wouldn't be extremely happy.

FWIW, ISTM that "true" division would be better implemented by the new
// operator, leaving the behavior of / unchanged.  But that's probably
just me.

Regards,
                                        -=Dave

-- 
Change is inevitable, progress is not.


From xavier.morel at masklinn.net  Fri Feb  3 08:29:53 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Fri, 03 Feb 2006 14:29:53 +0100
Subject: classmethod and instance method
In-Reply-To: <1138915844.118266.159770@g14g2000cwa.googlegroups.com>
References: <1138910923.048674.264840@g49g2000cwa.googlegroups.com>
	<drtr0v$95q$1@aphrodite.grec.isp.9tel.net>
	<1138915844.118266.159770@g14g2000cwa.googlegroups.com>
Message-ID: <drvlo0$gki$1@aphrodite.grec.isp.9tel.net>

andychambers2002 at yahoo.co.uk wrote:
> Yes that's better.  Didn't know about the __class__ attribute.  I
> thought there must be a way to access this but couldn't find it in the
> docs.
> 
> Thanks,
> 
> Andy
> 
dir(), help() and the interactive interpreter (IDLE or CLI) are your 
best friends.

Any time you wonder what an object does, or if you do something to an 
object, fire the interpreter, create your object, abuse it via 
dir/help/whatever, and then use dir/help/whatever on the results of 
dir'ing your object.

Oh, and use new style classes too (explicitly inherit from `object` or a 
built-in type), they are much more flexible and interesting than 
old-style classes

 >>> class Test: # old style class
	pass

 >>> test = Test()
 >>> dir(test) # are completely uninteresting
['__doc__', '__module__']
 >>> class Test(object): # new style classes on the other hand
	pass

 >>> test = Test()
 >>> dir(test) # have 2500% more sexyness
['__class__', '__delattr__', '__dict__', '__doc__', '__getattribute__', 
'__hash__', '__init__', '__module__', '__new__', '__reduce__', 
'__reduce_ex__', '__repr__', '__setattr__', '__str__', '__weakref__']
 >>>


From keith at nekotaku.com  Tue Feb 28 22:03:32 2006
From: keith at nekotaku.com (Keith Burns)
Date: Tue, 28 Feb 2006 20:03:32 -0700
Subject: MySQLdb compile error with AMD64
Message-ID: <20060301031016.868C31E4002@bag.python.org>


>> Can anyone offer any assistance on this one?
>
>Look here:
>
>>> gcc -pthread -fno-strict-aliasing -DNDEBUG -O2 -fmessage-length=0 -Wall
>>> -D_FORTIFY_SOURCE=2 -g -fPIC -I/usr/include/mysql
>>> -I/usr/include/python2.4 -c _mysql.c -o
>>> build/temp.linux-x86_64-2.4/_mysql.o -I/usr/include/mysql -g
>>> -march=i586 -mcpu=i686 -fmessage-length=0
>
>specifically at -march=i586. MySQLdb sets CFLAGS which aren't applicable to
>your processor, and as such the compile barfs. You should probably just run
>it with something like
>
>CFLAGS="-march=athlon-64" python setup.py build
>
>I am positive that MySQLdb works on AMD64, I have it running there. Anyway,
>the CFLAGS fix should work.

Hey there!

Appreciate the help but the CFLAGS did not change the gcc -march (I tried it
as above and with CFLAGS="-march=athlon64" which I found in a GCC flag FAQ).


I realize that the -march is my problem but I can't work out how to change
it.

Any ideas?

Thanks!

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From fredrik at pythonware.com  Thu Feb  9 17:09:45 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 9 Feb 2006 23:09:45 +0100
Subject: jump into the interpreter in a script
References: <43EA7A62.2090904@bryant.edu> <dsge6i$u76$1@sea.gmane.org>
Message-ID: <dsgeja$137$1@sea.gmane.org>

Carl Friedrich Bolz wrote:

> Yes. The "code" module of the stdlib is what you want. put
>
> import code
> code.interact(local=locals())
>
> into a point where you would like to have an interpreter prompt.

or, as a reusable function:

    http://effbot.org/librarybook/code.htm

(see the third example on that page)

</F>





From deets at nospam.web.de  Tue Feb 21 13:04:35 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 21 Feb 2006 19:04:35 +0100
Subject: Video Capture modules in linux
References: <1140536025.234765.309040@z14g2000cwz.googlegroups.com>
	<mailman.2244.1140537067.27775.python-list@python.org>
	<1140537926.084128.66160@g44g2000cwa.googlegroups.com>
Message-ID: <46134sF8rjpdU1@uni-berlin.de>

sudharsh at gmail.com wrote:

> well wht can i say it simply refuses to compile...i m getting make
> errors. i think the culprit is the gcc-4.0..secondly i havent had a
> chance to really try it out..aneways does libfg manipulate inputs from
> webcams..like VideoCapture modules ..also i think libfg is mainly for C
> although a module for python exists..forgive me i m a real newbie..

So it's far from not being useful. And a pure python video capture lib is
unlikely to happen - for various reasons, not the least being that there
are plenty of data to shuffle around in video grabbing. So - that _is_ a
C-domain.

I suggest you try getting libfg to run, probably by using you distro's
package management.

Diez


From albert at compuscan.co.za  Thu Feb  9 03:15:06 2006
From: albert at compuscan.co.za (Albert Leibbrandt)
Date: Thu, 09 Feb 2006 10:15:06 +0200
Subject: how to remove <BR> using replace function?
In-Reply-To: <1139472365.378523.141150@g44g2000cwa.googlegroups.com>
References: <1139462640.951603.302830@g44g2000cwa.googlegroups.com>	<1139464079.635612.289930@o13g2000cwo.googlegroups.com>	<1139465695.997171.159150@g44g2000cwa.googlegroups.com>	<1139469846.713121.219060@g47g2000cwa.googlegroups.com>
	<1139472365.378523.141150@g44g2000cwa.googlegroups.com>
Message-ID: <43EAFA0A.7030405@compuscan.co.za>



Rinzwind wrote:

>Works for me.
>
>  
>
>>>>txt = "an unfortunate <br> in the middle"
>>>>print txt.replace("<br>", "")
>>>>        
>>>>
>an unfortunate  in the middle
>  
>
>
>
>Though I don't like the 2 spaces it gives ;)
>
>  
>
so use regex and replace both the double spaces and the <br>

cheers
albert



From santafefrank at cybermesa.com  Fri Feb 10 22:37:07 2006
From: santafefrank at cybermesa.com (Frank LaFond)
Date: Fri, 10 Feb 2006 20:37:07 -0700
Subject: Jython inherit from Java class
In-Reply-To: <43ecee24_2@newspeer2.tds.net>
References: <1139344211.725580.263660@g47g2000cwa.googlegroups.com>
	<43eab05b_2@newspeer2.tds.net>
	<1139594138.216488.12730@g14g2000cwa.googlegroups.com>
	<1139600759.152551.138440@g14g2000cwa.googlegroups.com>
	<43ecee24_2@newspeer2.tds.net>
Message-ID: <dsjm56$cjr$1@reader2.nmix.net>

Jython 2.2 Alpha 1 supports Java 1.5

Frank.

Kent Johnson wrote:
> Mark Fink wrote:
> 
>> I observed something strange when I tried to compile the jython class:
>> 'assert' is a keyword, and may not be used as an identifier
>> (try -source 1.3 or lower to use 'assert' as an identifier)
>>     public static void assert(PyObject test, PyObject message) {
> 
> 
>> Looks like something in the Jython core causes the problem
>> (org\python\core\Py.java) any Ideas what I can do?
> 
> 
> I think jythonc is not compatible with Java 1.5, try compiling with 1.4.
> 
> Kent


From russandheather at gmail.com  Thu Feb  9 12:35:14 2006
From: russandheather at gmail.com (Russell Warren)
Date: 9 Feb 2006 09:35:14 -0800
Subject: Finding the public callables of self
In-Reply-To: <1139503421.181118.127580@o13g2000cwo.googlegroups.com>
References: <1139501230.964886.190500@g43g2000cwa.googlegroups.com>
	<1139503421.181118.127580@o13g2000cwo.googlegroups.com>
Message-ID: <1139506514.422801.248500@g14g2000cwa.googlegroups.com>

> import inspect
> myCallables = [name for name, value in inspect.getmembers(self) if not
> name.startswith('_') and callable(value)]

Thanks.  I forgot about the inspect module.  Interestingly, you've also
answered my question more than I suspect you know!  Check out the code
for inspect.getmembers():

def getmembers(object, predicate=None):
    """Return all members of an object as (name, value) pairs sorted by
name.
    Optionally, only return members that satisfy a given predicate."""
    results = []
    for key in dir(object):
        value = getattr(object, key)
        if not predicate or predicate(value):
            results.append((key, value))
    results.sort()
    return results

Seems familiar!  The fact that this is using dir(), getattr(), and
callable() seems to tell me there is no better way to do it.  I guess
my method wasn't as indirect as I thought!

And thanks for the reminder about getattr() instead of
__getattribute__() and other streamlining tips.

Russ



From gregory.petrosyan at gmail.com  Mon Feb 13 14:26:50 2006
From: gregory.petrosyan at gmail.com (Gregory Petrosyan)
Date: 13 Feb 2006 11:26:50 -0800
Subject: Pythonic gui format?
Message-ID: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>

Buenos dias, amigos!
I have to write  _simple_  gui library, for embedding into game. My
first attempt was to use XML: isn't it cute to describe ui in such a
way:

<window>
    <title>Hello World!</title>
    <image text="nice picture here" pos=... src=... />
    <text opts=...>
        (some text here)
    </text>
    <list>
        <item>first element</item>
        <item>second one...</item>
    </list>
    <button action=... text="Click Me!" />
</window>

(or something similar)

But after reading "Python Is Not Java"
http://dirtsimple.org/2004/12/python-is-not-java.html  (BTW I'm not a
Java programmer) I realised that it is actually not cute at all :) (am
I wrong here?)
I am currently seeking for pythonic alternative for XML. One possible
way is to create a class for every (type of?) window, like

class SomeDlg(Window):
    def __init__(self, dict?):
        self.setdict(dict)
        self.add_text("$friend would like to speak to you. $question")
        self.add_button(action=self.onclick,
                        text="Yeah, I'd like to $action !")
        ...

    def onclick(self):
        # process data here, send some messages etc.


Isn't it ugly a bit? Another variant is

dlg = Window(dict, [opts])
dlg.text("text here", [opts])
dlg.image(src, pos, text [etc])
....

or possibly

dlg = Window(...)
dlg.text = Text(...)
dlg.button = Button(...)
...
dlg.display(surface)


These styles of course can be combined... But IMHO looks not very nice
:( Maybe I shall not rely on introspection? Any suggestions, comments,
thoughts and links are welcome.
Thanks.



From jjl at pobox.com  Thu Feb  9 15:18:00 2006
From: jjl at pobox.com (John J. Lee)
Date: 09 Feb 2006 20:18:00 +0000
Subject: creat a DOM from an html document
References: <hr6Gf.1933$rL5.1215@newssvr27.news.prodigy.net>
	<oE6Gf.1938$rL5.241@newssvr27.news.prodigy.net>
Message-ID: <u7j84i8w7.fsf@pobox.com>

Mark Harrison <mh at pixar.com> writes:

> Mark Harrison <mh at pixar.com> wrote:
> > Now I can't seem to find this... does anybody have a recommendation
> > as to a good package to look at?
> 
> Ahh, it's BeautifulSoup...

Strictly that's not THE DOM, just A document object model.  The DOM
proper is a standardised interface, which BeautifulSoup does not
implement.  You could build a DOM using BeautifulSoup, though.


John



From onurb at xiludom.gro  Wed Feb  8 08:30:43 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Wed, 08 Feb 2006 14:30:43 +0100
Subject: 450 Pound Library Program
In-Reply-To: <dscpc8$5ki$1@wake.carmen.se>
References: <1139351498.090768.82270@o13g2000cwo.googlegroups.com>
	<dscpc8$5ki$1@wake.carmen.se>
Message-ID: <43e9f29b$0$612$636a15ce@news.free.fr>

Magnus Lycka wrote:
> just a few style notes...
> 
(snip)
> 
> Why bother with L? The follwing is as clear I think, and solves
> the problem of commas in the title. Also, don't put a space between
> the callable and the parenthesis please. See the Python style guide,
> PEP 008.
> 
>             author, bookName = line.split(",", 2)
>>> "toto, tata, tutu".split(",", 2)
['toto', ' tata', ' tutu']
>>>

You want line.split(',', 1) here.



-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From jaywgraves at gmail.com  Tue Feb 28 16:34:23 2006
From: jaywgraves at gmail.com (jay graves)
Date: 28 Feb 2006 13:34:23 -0800
Subject: Py2exe
References: <1141160676.947534.123630@t39g2000cwt.googlegroups.com>
Message-ID: <1141162463.658164.34110@i40g2000cwc.googlegroups.com>

First google.com hit using your title.

http://www.google.com/search?q=py2exe



From larry.bates at websafe.com  Fri Feb 24 12:32:16 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Fri, 24 Feb 2006 11:32:16 -0600
Subject: Exception not raised
In-Reply-To: <43ff3fc8$0$29105$5fc30a8@news.tiscali.it>
References: <43ff3fc8$0$29105$5fc30a8@news.tiscali.it>
Message-ID: <43FF4320.9090904@websafe.com>

Michele Petrazzo wrote:
> Hi list, I have a strange error on my software on win 2k/xp and debian
> 3.1 with py 2.3.5 / 2.4.1 + twisted + wxpython:
> 
> python, on a piece of code doesn't raise a KeyError on a dict (that
> don't have that key), but the strange thing is that the try/except code
> see that exception. Other strange thing is that other exceptions are
> raised!
> 
> Simple example extract from my code:
> 
> #code
> def test():
>  print type(t_fields), 11 in t_fields
>  print t_fields[11]
>  print "I'm here"
> 
> print "ok"
> test()
> print "ok"
> #end code
> 
> Output:
> 
> ok
> <type 'dict'> False
> 
> Here I see only one "ok" and not the "I'm here". The interpreter stop to
> run here, but the application continue to work!
> 
> Other try:
> 
> #code
> def test():
>  try:
>   print type(t_fields), 11 in t_fields
>   print t_fields[11]
>  except KeyError, ex:
>   print "Error",  ex
> #end code
> 
> Output:
> 
> ok
> <type 'dict'> False
> Error 11
> ok
> 
> Here the output is ok, so python see that exception inside the
> try/except and print it.
> 
> Last try:
> 
> #code
> def test()
>  print type(t_fields), 11 in t_fields
>  print dont_exist
>  print t_fields[11]
> #end code
> 
> Output:
> 
> ok
> <type 'dict'> False
> File "conn.py", line 231, in test
>     print dont_exist
> NameError: global name 'dont_exist' is not defined
> 
> 
> So all the exception are raised except the KeyError outside the try/except!
> 
> I don't know what can be.
> 
> Thanks to all that can help me.
> Michele

When I run your first example I get:

>>> <type 'dict'> False
Traceback (most recent call last):
  File "C:\Python24\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py",
line 310, in RunScript
    exec codeObject in __main__.__dict__
  File "C:\Documents and Settings\larry\My Documents\junk.py", line 14, in ?
    test()
  File "C:\Documents and Settings\larry\My Documents\junk.py", line 8, in test
    print t_fields[11]
KeyError: 11
>>>

I don't know why you see anything different than a traceback when you
try to access t_fields[11] (which doesn't exist).

-Larry Bates


From LittlePython at lost.com  Sun Feb 12 19:42:43 2006
From: LittlePython at lost.com (LittlePython)
Date: Mon, 13 Feb 2006 00:42:43 GMT
Subject: Python equivilant to msgbox()
Message-ID: <7CQHf.2690$7C3.1780@trnddc08>

Is there an equivalent to a msgbox() or wscript.echo (via wcsript) . I would like to call this instead of print (to the screen) . I would like to write a simple script that is not an event drive gui but calls input boxes, message boxes, or maybe even a file open browser box as well? 
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From finite.automaton at gmail.com  Wed Feb 22 03:34:18 2006
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 22 Feb 2006 00:34:18 -0800
Subject: ANN: yet another python graphviz binding (yapgvb) 1.1.1
Message-ID: <1140597258.885218.40030@o13g2000cwo.googlegroups.com>

Introducing Yapgvb, a Python wrapper around the AT&T's graph layout
library Graphviz.

Features:
  - A nice clean Pythonic interface
  - Boost.Python wrapper around the C libraries; no more fiddling with
system calls to dot.
  - Read and write .dot files using Graphviz's own library routines.
  - Translation to and from Boost.Graph; do your computation using
Boost, and draw it with Graphviz.
  
URL:   http://yapgvb.sourceforge.net



From bjtexas at hotmale.con  Fri Feb 10 09:29:49 2006
From: bjtexas at hotmale.con (BJ in Texas)
Date: Fri, 10 Feb 2006 14:29:49 GMT
Subject: Mental Abuse
References: <1139519949.266435.18420@o13g2000cwo.googlegroups.com>
Message-ID: <xr1Hf.19636$_S7.5450@newssvr14.news.prodigy.com>

khaccountant at yahoo.com wrote:
|| My abuser has been using the medical device to harass me the
|| last 4-5 years. I have no idea what type of a device is being
|| used on me. I believe the device is only available to
|| licensed pharmacist(s). I am not very familiar with the
|| intend usage of the device. As I understand, the device can
|| be used as a stimulator; 24 hours therapeutic session; ease
|| off a lot of emotion--anger, sadness, fear...ect.; enhance
|| recovery of mental illnesses. If abuse is the intention, it
|| can be used to sense what the other person's thinking or as a
|| form of communication through inner voices. In my case, the
|| abuser has been using it to insult me in every way he could
|| possible think of. As I know, a single device is only
|| effective if you are in the same city. Mulitple devices can
|| reach billion of people world wide.  Fear of being evaluate
|| as mental ill due to lack of physical evidence. I am hoping
|| to find out more about the device, before reporting to the
|| police. If anyone know what type of a device has been using
|| on me. Who manufacture such a device. What can I do to stop
|| the abuser from such criminal act? Please email me at
|| khaccountant at yahoo.com, I would greatly appreciated.

I am not sure of the device being used but try this....
http://zapatopi.net/afdb/

-- 
"The power of artificial intelligence is nothing compared to the
power of human stupidity."




From lists at fabis-site.net  Thu Feb  2 16:25:44 2006
From: lists at fabis-site.net (Fabian Steiner)
Date: Thu, 02 Feb 2006 22:25:44 +0100
Subject: PyQt: QListView how to retrieve selected items?
In-Reply-To: <1138907537.417067.228570@z14g2000cwz.googlegroups.com>
References: <1138907537.417067.228570@z14g2000cwz.googlegroups.com>
Message-ID: <drtt2d$uie$00$1@news.t-online.com>

Hi!

Sorry for adopting your post for my own question, but since it is 
related to PyQT I think it's ok: Does anybody of you know where the 
openbook ?GUI Programming with Python: QT Edition? has gone? It's not 
available any more: http://www.opendocs.org/pyqt/ points now to a 
non-existing site.

So far, I also couldn't find any other site to have a look at the online 
version.

Any hints are welcome!


From jack at performancedrivers.com  Thu Feb  9 11:06:01 2006
From: jack at performancedrivers.com (Jack Diederich)
Date: Thu, 9 Feb 2006 11:06:01 -0500
Subject: Pulling all n-sized combinations from a list
In-Reply-To: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>
Message-ID: <20060209160601.GB5942@performancedrivers.com>

On Wed, Feb 08, 2006 at 12:50:19PM -0800, Swroteb wrote:
> Hi there,
> 
> I've got a reasonably sized list of objects that I'd like to pull out
> all combinations of five elements from.  Right now I have a way to do
> this that's quite slow, but manageable.  I know there must be a better
> way to do this, but I'm not sure what it is.  Here's what I've got so
> far:
> 

import probstat # http://probstat.sourceforge.net
for (a, b, c) in probstat.Combination(range(9), 3): # 0..9, pick 3
  print a, b, c

It is a C extension that does permutations & combinations and is
about 10x faster than doing it in pure python [I'm the author].
It is also the 3rd result for "python combination" and 5th for
"python permutaiton" but every month someone posts to c.l.py asking
for something similar.  Go figure.

-jackdied


From max at alcyone.com  Tue Feb 21 02:38:15 2006
From: max at alcyone.com (Erik Max Francis)
Date: Mon, 20 Feb 2006 23:38:15 -0800
Subject: Mutable numbers
In-Reply-To: <dteele$9pi$1@home.itg.ti.com>
References: <dteele$9pi$1@home.itg.ti.com>
Message-ID: <pa2dnWXzv-v1XmfeRVn-rQ@speakeasy.net>

Suresh Jeevanandam wrote:

> But why not have mutable numbers also in the language.

The short answer I'd give is probably that this is so easy to do with a 
user-defined class that it's never been all that pressing.

> In any application most of the operation is numerical. So, i think, we 
> should get a good speed advantage with the availability of mutable 
> numbers. What do you think ?

Why do you think this would afford any speed advantage at all?  The 
reason that math operations are potential slow in Python is because it's 
interpreted; having mutable numerics doesn't change that fact.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   I will always remember / This moment
   -- Sade


From rubic88 at gmail.com  Fri Feb 24 08:07:19 2006
From: rubic88 at gmail.com (Rubic)
Date: 24 Feb 2006 05:07:19 -0800
Subject: datetime iso8601 string input
References: <1140714826.044272.253460@t39g2000cwt.googlegroups.com>
	<dtmjh7$97t$1@wake.carmen.se>
Message-ID: <1140786439.054438.32080@u72g2000cwu.googlegroups.com>

Magnus,

Thanks for your reply.  I wasn't clear in my
prior post.  Rather than support the entire
range of iso8601 formats, how about *just* the
format that datetime emits?  Call it the
parse_datetime() function.  Then it would be
possible to take the output string of a datetime
object and read it back in to round-trip the
data.

    >>> now = str(datetime.datetime.now())
    >>> now
    '2006-02-24 06:58:23.737586'
    >>> datetime.parse_datetime(now)
    datetime.datetime(2006, 2, 24, 6, 58, 23, 737586)

Jeff Bauer
Rubicon, Inc.



From duncanm255 at hotmail.com  Fri Feb 17 01:04:41 2006
From: duncanm255 at hotmail.com (D)
Date: 16 Feb 2006 22:04:41 -0800
Subject: Open Relay Test
In-Reply-To: <mailman.2039.1140154929.27775.python-list@python.org>
References: <1140150719.298606.9710@g44g2000cwa.googlegroups.com>
	<mailman.2039.1140154929.27775.python-list@python.org>
Message-ID: <1140156281.588073.276070@g47g2000cwa.googlegroups.com>

Nope, quite the contrary..I'm looking to write a simple program for a
client of mine that will, among other things, verify that their
clients' email servers do not have open relays.



From elpX at adsihqX.com  Tue Feb 21 17:34:47 2006
From: elpX at adsihqX.com (Dr. Pastor)
Date: Tue, 21 Feb 2006 22:34:47 GMT
Subject: Video.
Message-ID: <bAMKf.4037$UN.840@newsread2.news.pas.earthlink.net>

Dear All:
(I am a 100% beginner in Python.)
What environment,library,product should I
import or study to manipulate cameras, video,
fire-wire, avi files?
Thanks you for any guidance.



From *firstname*nlsnews at georgea*lastname*.com  Sun Feb 26 13:45:20 2006
From: *firstname*nlsnews at georgea*lastname*.com (Tony Nelson)
Date: Sun, 26 Feb 2006 18:45:20 GMT
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
References: <dtl9ad$35h$1@sea.gmane.org> <dtlat7$80c$1@sea.gmane.org>
	<mailman.2376.1140733288.27775.python-list@python.org>
	<dtljre$f8i$1@newsreader3.netcologne.de>
	<dtn5l2$nhr$1@newsreader3.netcologne.de>
	<dtqpkl$kbo$1@newsreader3.netcologne.de>
Message-ID: <*firstname*nlsnews-46208F.13454626022006@news.verizon.net>

In article <dtqpkl$kbo$1 at newsreader3.netcologne.de>,
 Claudio Grondi <claudio.grondi at freenet.de> wrote:

> Claudio Grondi wrote:
> > Claudio Grondi wrote:
> > 
> >> Paul Probert wrote:
> >>
> >>> Peter Hansen wrote:
> >>>
> >>>> Are you saying that you believe the time.sleep(1) call is actually 
> >>>> blocking for 200 seconds?
> >>
> >> With such rare occurrence it is very hard to tell what is going on. 
> >> Usually I put such strange things on a list of curiosities I don't 
> >> want to know the reason of, because it is in my eyes not worth the 
> >> effort. Maybe it is even a common problem not yet detected by me, 
> >> because I have never run this kind of tests for such a long time.
> >> Starting today, I can tell you statistically not earlier than in one 
> >> week, if I have the same problem on my machines (currently I am 
> >> running only one or two at the same time).
> > 
> > 
> > Here the intermediate results on my Windows XP machine connected to the 
> > Internet via very fast digital phone line connection (network 
> > card/digital-converter box/phone-line):
> > 
> > dt= 1.125          time= 2006_02_24_11h_36m_15s
> > dt= 9.20200014114  time= 2006_02_24_12h_46m_49s
> > dt= 1.18799996376  time= 2006_02_24_14h_43m_32s
> > 
> > The code used:
> > """
> > import time
> > while True:
> >   oldtime=time.time()
> >   time.sleep(1.0)
> >   newtime=time.time()
> >   dt=newtime-oldtime
> >   if dt > 1.1:
> >     print 'dt=',dt,' time=',time.strftime('%Y_%m_%d_%Hh_%Mm_%Ss')
> > """
> > running in a command line console parallel to usual daily business on 
> > the computer.
> > 
> > The yesterday night run (5 hours) gave max. 1.125 sec., so I am 
> > surprized to see the 9 seconds already after only two hours today.
> > 
> > Claudio
> 
> The 9.2 seconds difference was also because of time synchronization 
> Windows XP does using time.windows.com server - it reported to be done 
> last time 2006-02-24 at 12:46 o'clock i.e. exactly at the same time 
> where the 9.2 delay occurred.

ISTM that using time-of-day is the wrong thing for measuring elapsed 
time, but I don't find anything in the time module that would be better.  
/proc/uptime looks like it would work on linux, in a roundabout way:

    >>> up = open('/proc/uptime')
    >>> up.seek(0) ; up.read()

will print uptime and idle time, but on linux only.  At least it seems 
to be fast enough for the purpose at hand (about 18 microseconds on my 
old box, according to timeit).

Is there a better timer available in python?  I see that timeit module 
uses time.time() (or time.clock() on MSWindows), so I am not hopeful.
________________________________________________________________________
TonyN.:'                        *firstname*nlsnews at georgea*lastname*.com
      '                                  <http://www.georgeanelson.com/>


From uval at rz.uni-karlsruhe.de  Mon Feb  6 14:17:51 2006
From: uval at rz.uni-karlsruhe.de (=?ISO-8859-1?Q?Sch=FCle_Daniel?=)
Date: Mon, 06 Feb 2006 20:17:51 +0100
Subject: * 'struct-like' list *
In-Reply-To: <1139245389.529742.317110@g43g2000cwa.googlegroups.com>
References: <1139245389.529742.317110@g43g2000cwa.googlegroups.com>
Message-ID: <ds80pb$jbo$1@news2.rz.uni-karlsruhe.de>


> I would like to have an array of "structs."  Each struct has
> 
> struct Person{
>     string Name;
>     int Age;
>     int Birhtday;
>     int SS;
> }


the easiest way would be

class Person:
	pass

john = Person()
david = Person()

john.name = "John Brown"
john.age = 35
etc

think of john as namespace .. with attributes (we call them so) added on 
runtime

better approch would be to make real class with constructor

class Person(object):
	def __init__(self, name, age):
		self.name = name
		self.age = age
	def __str__(self):
		return "person name = %s and age = %i" % (self.name, self.age)

john = Person("john brown", 35)
print john	# this calls __str__


> 
> I want to go through the file, filling up my list of structs.
> 
> My problems are:
> 
> 1.  How to search for the keywords "Name:", "Age:", etc. in the file...
> 2.  How to implement some organized "list of lists" for the data

this depend on the structure of the file
consider this format

New
Name: John
Age: 35
Id: 23242
New
Name: xxx
Age
Id: 43324
OtherInfo: foo
New

here you could read all as string and split it on "New"

here small example
 >>> txt = "fooXbarXfoobar"
 >>> txt.split("X")
['foo', 'bar', 'foobar']
 >>>

in more complicated case I would use regexp but
I doubt this is neccessary in your case

Regards, Daniel



From mik3l3374 at hotmail.com  Sat Feb 18 01:21:07 2006
From: mik3l3374 at hotmail.com (mik3)
Date: 17 Feb 2006 22:21:07 -0800
Subject: Activestate python installation
Message-ID: <1140243666.990365.131220@f14g2000cwb.googlegroups.com>

hi
this is a question regarding installing Activestate python
whenever i try to install the latest Activestate Python on WinXP SP2,
it gives me error saying
"The wizard was interrupted before Activestate 2.4.2 could be
completely installed. Your system has not been modified ....."
any ideas why this is going on?
thanks



From vivainio at gmail.com  Sun Feb 19 13:01:59 2006
From: vivainio at gmail.com (Ville Vainio)
Date: 19 Feb 2006 10:01:59 -0800
Subject: How many web framework for python ?
References: <mailman.2085.1140244423.27775.python-list@python.org>
	<43f8718e$0$7344$626a54ce@news.free.fr>
	<slrndvh4ph.at4.sybrenUSE@schuimige.unrealtower.org>
Message-ID: <1140372119.816674.315130@g44g2000cwa.googlegroups.com>

Sybren Stuvel wrote:

> Why forget it? I've written my own web framework
> (http://www.unrealtower.org/) and it works great! It was a good

Some reasons:

- Waste. When you write your own framework, you are helping yourself.
If you use an existing framework and possibly contribute patches to it,
you help other people too.

- Other people have already solved your problems, also problems that
you can't think of yet.

- Not reusing code is just plain evil.



From eric at qwhd746oihd49.net  Sun Feb  5 16:22:52 2006
From: eric at qwhd746oihd49.net (Matt Helm)
Date: Sun, 05 Feb 2006 15:22:52 -0600
Subject: win32com, BSTR, and null terminated strings
Message-ID: <mzh5xzyr.fsf@qwhd746oihd49.net>



I am using win32com to access a third party COM interface but am
having trouble using the string that is returned.

The vendor's docs show the following method:
 
    HRESULT CookString(BSTR param_a, short buf_size, [out, retval] BSTR* result_b);

param_a is a string to be processed.
buf_size is the size of the returned string + 1.

I can't know what the exact length of the returned string will be but
it is safe to assume it will not exceed 80 chars.
 
I have been calling it as such:

    import win32com.client

    o = win32com.client.Dispatch("BFG9000.BFG9000")

    r = o.Cook("ABCDEFG", 81)


r comes back as a Python string 81 chars in length with a null at the
end of the actual valid text. In other words, it is your normal buffer
containing a null terminated string.

Python treats the whole 81 chars as valid - even though most of the
string is garbage. This is the expected behavior and I understand
this.

However, what is the proper way to recover the actual string? I have
been using:

    r.split("\0", 1)[0]

but it seems like a bit of a kludge.


Regards,
Matt



From i18n-bounces at mova.org  Wed Feb  1 03:12:56 2006
From: i18n-bounces at mova.org (i18n-bounces at mova.org)
Date: Wed, 01 Feb 2006 09:12:56 +0100
Subject: Your message to I18n awaits moderator approval
Message-ID: <mailman.8703.1138781576.5229.i18n@mova.org>

Your mail to 'I18n' with the subject

    Mail Delivery (failure i18n at mova.org)

Is being held until the list moderator can review it for approval.

The reason it is being held:

    Post by non-member to a members-only list

Either the message will get posted to the list, or you will receive
notification of the moderator's decision.  If you would like to cancel
this posting, please visit the following URL:

    http://mova.org/lists/confirm/i18n/30d60ea361578b1a99af566b2f1fb4a5b11846c8



From battlefieldplayer at hotmail.com  Tue Feb  7 11:18:09 2006
From: battlefieldplayer at hotmail.com (Bennie Tilma)
Date: Tue, 07 Feb 2006 17:18:09 +0100
Subject: problem with opening Python IDLE
Message-ID: <BAY111-F2934742C513CF2B6568CFB4010@phx.gbl>

I'm having trouble with opening the python IDLE-program. When I try to start 
it, it gives an errormessage wich states that it can not make a connection, 
possibly because of a firewall. However, adding it to firewalls exeptions or 
even disabeling the firewall has no effect.

These are the errors:
1st. 'Socket error: Connection refused', with the name IDLE subprocess Error
2nd. 'IDLE's subprocess didn't make connection. Either IDLE can't start a 
subprocess or personal firewall software is blocking the connection.

The program I am trying to use is included with this message (it's purpose 
is to get a letter from the user and then pick a letter two places forward 
in the line, alphabetical order).

Bennie Tilma
battlefieldplayer at hotmail.com

_________________________________________________________________
Typ je SMS sneller binnen MSN Messenger 
http://www1.imagine-msn.com/Messenger/Expressions.aspx
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From python at rcn.com  Sat Feb 25 15:32:27 2006
From: python at rcn.com (Raymond Hettinger)
Date: 25 Feb 2006 12:32:27 -0800
Subject: Can optparse do dependencies?
In-Reply-To: <1140885582.311180.120550@i39g2000cwa.googlegroups.com>
References: <1140885582.311180.120550@i39g2000cwa.googlegroups.com>
Message-ID: <1140899547.915735.150330@j33g2000cwa.googlegroups.com>

[Bob]
> I'd like to setup command line switches that are dependent on other
> switches, similar to what rpm does listed below. From the grammar below
> we see that the "query-options" are dependent on the query switch,
> {-q|--query}. Can "optparse" do this or do I have to code my own
> "thing"? Thanks.
>
> QUERYING AND VERIFYING PACKAGES:
>        rpm {-q|--query} [select-options] [query-options]
> ...
>    query-options
>         [--changelog] [-c,--configfiles] [-d,--docfiles] [--dump]
>         [--filesbypkg] [-i,--info] [--last] [-l,--list]
>         [--provides] [--qf,--queryformat QUERYFMT]
>         [-R,--requires] [--scripts] [-s,--state]
>         [--triggers,--triggerscripts]

The optparse module doesn't have native support for switch
dependencies; however, it could likely be done with multiple passes.
The parse_args() takes an args list as an argument.  Make first pass
that captures your main query switches, then run another parser on a
slice of the args list.

For example, capture the main switches on a first pass over the full
argument list (catching all possible main switches and treating
everything else as a catchall).  Given, args=['-ql', '--changelog',
'-d', '-c'], parse out the --changelog and then call another parser
with args=['-d', '-c'].

This functionality seems useful enough to build into the tool directly,
so do consider putting a feature request on SourceForge (and assign to
Greg Ward).


Raymond



From arkanes at gmail.com  Sat Feb 11 14:07:30 2006
From: arkanes at gmail.com (Chris Mellon)
Date: Sat, 11 Feb 2006 13:07:30 -0600
Subject: Legality of using Fonts
In-Reply-To: <pan.2006.02.11.10.08.43.753266@REMOVETHIScyber.com.au>
References: <1139591308.864757.154740@g44g2000cwa.googlegroups.com>
	<pan.2006.02.10.23.30.05.619934@REMOVETHIScyber.com.au>
	<1139631874.397548.37840@g47g2000cwa.googlegroups.com>
	<pan.2006.02.11.10.08.43.753266@REMOVETHIScyber.com.au>
Message-ID: <4866bea60602111107j43066f19qd6da269c55953fc6@mail.gmail.com>

On 2/11/06, Steven D'Aprano <steve at removethiscyber.com.au> wrote:
> On Fri, 10 Feb 2006 20:24:34 -0800, Ross Ridge wrote:
>
> > Steven D'Aprano wrote:
> >> It is highly unlikely that any judge will be fooled by a mere change in
> >> format ("but Your Honour, I converted the TTF file into a bitmap").
> >
> > If that were true, almost the entire X11 bitmap font collection would
> > be illegal.  Fonts aren't subject copyright, just the hints in most
> > outline fonts, which are considered computer programs.
>
> This may come as a shock to you, but the USA is not the entire world, and
> the US government's decision to exclude typefaces from copyright
> protection is anomalous. In almost the entire rest of the world,
> typefaces (the design of a font) are able to be copyrighted, and so are
> fonts whether they are bitmapped or outline (with or without hints).
>
>
> See, for example: http://www.typeright.org/feature4.html
>
> In any case, even in the USA, hinted fonts are copyrightable, and merely
> removing the hints (say, by converting to a bitmap) is no more legal than
> whiting out the author's name from a book and claiming it as your own.
>

This is absolutely wrong. It is perfectly legal to extract the
non-copyrightable elements of a copyrighted work (the typeface itself,
in this case) and do whatever you want with it.

> Of course, like all these issues, the actual decision of a judge and jury
> in the USA is uncertain -- who knows whether they will consider a
> bitmapped version of a TTF font to be a derivative work or not? So even in
> the USA, unless you want to spend big dollars on legal fees, the best
> advice is to stick to fonts which are distributed under open licences.
>

I'd say this is a case that isn't uncertain at all. The lack of
protection for typefaces is not a loophole or unclear convention -
Congress and the copyright office explicitly refuse to extend
copyright protection to typefaces. The loophole, in fact, is the
protection of hinted fonts, which are only protected to the degree
that they are "computer programs", because they are *not* protectable
as fonts, period. Saying it is uncertain is not intellectually honest,
in my opinion.

Now, I personally feel that this is a case where Congress made a poor
decision on all counts - TTF files are a prime example of programs
that should not be copyrightable (mechanical implementation), and
typefaces should be. But that's not the state of affairs in the US.

>
>
> --
> Steven.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From nas-usenet at arctrix.com  Sun Feb  5 11:14:54 2006
From: nas-usenet at arctrix.com (Neil Schemenauer)
Date: Sun, 05 Feb 2006 16:14:54 GMT
Subject: Generators vs. Functions?
References: <0001HW.C00ABC2B000323A6F0335550@news.individual.de>
	<43E50E73.40504@kzoo.edu>
	<mailman.1426.1139097119.27775.python-list@python.org>
	<gkeFf.434944$2k.218378@pd7tw1no>
	<pan.2006.02.05.08.14.28.103057@REMOVETHIScyber.com.au>
Message-ID: <2wpFf.560203$ki.296214@pd7tw2no>

Steven D'Aprano <steve at REMOVETHIScyber.com.au> wrote:
> Have you actually measured this, or are you just making a wild
> guess?

I haven't timed it until now but my guess it not so wild.  I'm
pretty familiar with the generator implementation (having written
the initial version of it).  In Python 2.3, resuming a generator
does a small amount of setup and then calls eval_frame().  Calling a
function does more setup work and then also calls eval_frame().

> Here is my test, using Python 2.3. I've tried to make the test as
> fair as possible, with the same number of name lookups in both
> pieces of test code.

On my machine t4 is faster than t3.  Your test is not so fair
because the generator is doing a "while" loop (executing more
bytecode instructions) while the function is just returning a value
(one instruction).

On your machine the function call may be faster due to CPU cache
effects or branch prediction.  In any case, the difference you are
trying to measure is extremely small.  Try adding some arguments to
the functions (especially keyword arguments).

What your test does show is that the speed difference should not
come into the decision of which construct to use.

  Neil


From bblais at bryant.edu  Wed Feb  8 18:10:26 2006
From: bblais at bryant.edu (Brian Blais)
Date: Wed, 08 Feb 2006 18:10:26 -0500
Subject: jump into the interpreter in a script
Message-ID: <43EA7A62.2090904@bryant.edu>

Hello,

I was wondering if there is a way to, within a script, jump into the interpreter.
What I mean is something like the "keyboard" command in Matlab, where the script
pauses and you get an interpreter prompt, where you can look at variables, change
their values, etc.  then when you exit the interpreter, the script continues from
where it left off.  Is this possible in python?


		thanks,

			Brian Blais


-- 
-----------------

             bblais at bryant.edu
             http://web.bryant.edu/~bblais



From grante at visi.com  Tue Feb  7 09:45:26 2006
From: grante at visi.com (Grant Edwards)
Date: Tue, 07 Feb 2006 14:45:26 -0000
Subject: Accessing Windows Serial Port
References: <1139253898.601680.265220@g44g2000cwa.googlegroups.com>
	<11ufe0agltktg7d@corp.supernews.com>
	<1139307603.912911.44770@z14g2000cwz.googlegroups.com>
Message-ID: <11uhck6jh4lva18@corp.supernews.com>

On 2006-02-07, malv <malvert at telenet.be> wrote:
> Hi All,
> Would anybody know whether PySerial would work over an usb/serial
> adapter?

Yes.

> (what about usb/parallel adapters?)

Don't know.

-- 
Grant Edwards                   grante             Yow!  I'm an East Side
                                  at               TYPE...
                               visi.com            


From samschul at pacbell.net  Wed Feb 22 12:36:49 2006
From: samschul at pacbell.net (sam)
Date: 22 Feb 2006 09:36:49 -0800
Subject: Pyserial never read
In-Reply-To: <1140599901.082142.262540@f14g2000cwb.googlegroups.com>
References: <1140105936.408387.88130@z14g2000cwz.googlegroups.com>
	<1140219414.143448.234450@z14g2000cwz.googlegroups.com>
	<1140302110.028540.176210@g43g2000cwa.googlegroups.com>
	<slrndvm0sr.6k1.nick@irishsea.home.craig-wood.com>
	<mailman.2241.1140536285.27775.python-list@python.org>
	<slrndvn1ad.he1.nick@irishsea.home.craig-wood.com>
	<1140599901.082142.262540@f14g2000cwb.googlegroups.com>
Message-ID: <1140629809.822833.33230@o13g2000cwo.googlegroups.com>

luca72 wrote:
> Thanks to all for the help,
>
> here you find the code, pls note if i use handshaking = 1 the
> application don't start.
> in the delphi configuratio of com port if i use or not handshaking the
> application work.
> Best Regards at all
>
> Luca
>
> import serial
>         import win32file
>         port = 2

Is port = 2 correct?
I thought that com ports under windows are designated as a string
"com1","com2",..etc.

>         baudrate = 38400
>         bytesize =serial.EIGHTBITS
>         parity =serial.PARITY_ODD
>         stopbits =serial.STOPBITS_TWO
>         timeout = 1
>         ser = serial.Serial(2, baudrate=38400, bytesize=8,
> parity=serial.PARITY_ODD, stopbits=2, timeout=3)
>         ct = ''
>         ch = ''
>         a = self.textCtrl1.GetValue()
>         ind = 0
>         ind1 = 2
>         lunghezza = len(a)
>         while ind < lunghezza :
>             b = a[ind:ind1]
>             b = int(b,16)
>             b = ~b
>             c = ''.join([str((b >> Digit) & 1) for Digit in range(7,
> -1, -1)])
>             c1 = c[0:4]
>             c2 = c[4:]
>             c1 = c1[3:] + c1[2:3] + c1[1:2] + c1[0:1]
>             c2 = c2[3:] + c2[2:3] + c2[1:2] + c2[0:1]
>             c1 = hex(int(c1,2))
>             c2 = hex(int(c2,2))
>             c1 = c1[2:]
>             c2 = c2[2:]
>             c = c2+c1
>             ct = ct + c
>             ind = ind + 2
>             ind1 = ind1 + 2
>             c = int(c,16)
>             c = chr(c)
>             ch = ch + c
>
>
>         ser.write(ch)
>
>         elf.textCtrl2.SetValue(ct)
>         ser.readline()
 You might want to try using ser.read() instead of ser.readline() as
you may not be getting  linefeed carrage return characters . I usually
setup a buffer to scan for the characters I expect.

>
>
>
> Pls.Note i hove also try with read(number of byte ) with inWaiting(),
> flush  etc........
> 
> 
> But no result.
> 
> Thanks Luca

Hope this helps
Sam Schulenburg



From kmkz89 at gmail.com  Sun Feb 26 20:54:25 2006
From: kmkz89 at gmail.com (kmkz)
Date: 26 Feb 2006 17:54:25 -0800
Subject: Kill forked processes
In-Reply-To: <mailman.2456.1140992498.27775.python-list@python.org>
References: <1140990351.604347.29110@i39g2000cwa.googlegroups.com>
	<mailman.2456.1140992498.27775.python-list@python.org>
Message-ID: <1141005265.153261.201230@e56g2000cwe.googlegroups.com>

Thank you for your reply. I will certainly look into those.

Another question:

Lets say my script A executes two other scripts, B and C. B is a Python
file compiled into an exe and uses the regular black box. C, however,
is a C++ program that I did not write, and have no access to (besides
executing it. ie, i don't have its source). I would like to fork off
the process B and C from A, but make B and C invisible and unable to be
shut down by the user. This way, they have to kill process A.
Unfortunately, this brings me back to the problem I posted above: how
to make the subprocesses dependant on its parent process. Since I have
no access to the C++ program's source I need to come up with a better
way of forcing the OS to "see" process B as being inside of process C
and then shut it down, deallocate its memory, close its pipes, etc...

Any ideas?

I'll be willing to PayPal $10 to anyone who completely figures this out
for me :)



From henrique.ferreiro at gmail.com  Sat Feb 25 18:33:44 2006
From: henrique.ferreiro at gmail.com (Henrique Ferreiro)
Date: Sun, 26 Feb 2006 00:33:44 +0100
Subject: looking for a simpe plotting module
In-Reply-To: <001201c63a5f$65781330$2f01a8c0@m8d4477f3de884>
References: <001201c63a5f$65781330$2f01a8c0@m8d4477f3de884>
Message-ID: <1140910425.6611.1.camel@localhost>

matplotlib is an excellent library which uses the syntax of matlab
plots.

http://matplotlib.sourceforge.net

O S?b, 25-02-2006 ?s 15:01 -0800, MARK LEEDS escribiu:
> i'm pretty much a python beginner so can anyone recommend a plooting
> package in python ( simple foating  numbers 
> that makes lines or dots with a yaxis and an an xaxis. i don't need
> fancy drawings ) that is a built in module 
> in python ?  i am using python 2.4 in linux if that matters. thanks.
> 
> 
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list



From onurb at xiludom.gro  Fri Feb  3 12:28:28 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Fri, 03 Feb 2006 18:28:28 +0100
Subject: Compiling
In-Reply-To: <mailman.1387.1138986082.27775.python-list@python.org>
References: <mailman.1387.1138986082.27775.python-list@python.org>
Message-ID: <43e392d1$0$31853$626a54ce@news.free.fr>

Simon Faulkner wrote:
> Pardon me if this has been done to death but I can't find a simple
> explanation.
> 
> I love Python for it's ease and speed of development especially for the
> "Programming Challenged" like me but why hasn't someone written a
> compiler for Python?

But there *is* a compiler for Python.
http://www.python.org/doc/2.4.2/lib/module-compiler.html

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From matteosartori at gmail.com  Fri Feb 24 12:02:06 2006
From: matteosartori at gmail.com (matteosartori at gmail.com)
Date: 24 Feb 2006 09:02:06 -0800
Subject: Regular expression fun. Repeated matching of a group Q
In-Reply-To: <1140799070.650639.205880@v46g2000cwv.googlegroups.com>
References: <1140794885.460929.223080@i39g2000cwa.googlegroups.com>
	<1140796529.104793.54160@e56g2000cwe.googlegroups.com>
	<1140797999.467407.173080@u72g2000cwu.googlegroups.com>
	<1140799070.650639.205880@v46g2000cwv.googlegroups.com>
Message-ID: <1140800526.292382.311240@i39g2000cwa.googlegroups.com>

Yes, it's easier to read without a doubt. I just wondered if i was
failing to do what i was trying to do because it couldn't be done or
because i hadn't properly understood what i was doing. Alas, it was
probably the latter.

Thanks for your help,

M@



From maxerickson at gmail.com  Mon Feb  6 10:31:24 2006
From: maxerickson at gmail.com (Max Erickson)
Date: Mon, 6 Feb 2006 15:31:24 +0000 (UTC)
Subject: How to I write DBASE files without ODBC
References: <43E72F49.9090306@gmail.com>
Message-ID: <Xns97626B0E2E534maxericksongmailcom@80.91.229.5>

Durumdara <durumdara at gmail.com> wrote in news:43E72F49.9090306 at gmail.com:

> Can anybody known about DBASE handler module for Python ?

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/362715


max



From deets at nospam.web.de  Fri Feb 24 05:01:42 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 24 Feb 2006 11:01:42 +0100
Subject: Exception-handling
References: <slrndvtm56.9s5.oddr@apal.ii.uib.no>
Message-ID: <468406F9s91tU1@uni-berlin.de>

Odd-R. wrote:

> I have come over a strange problem regarding exceptions
> This is my code:
> 
> try:
>   #some operation
> except Exception, info:
>   #some message
> except:
>   #??
> 
> When executing my code, I get to the last block here. This
> I find rather strange, because I thought Exception would catch
> all exceptions. But this is obviously not the case here.
> 
> What is this, and how can I get a hold of what causes the exception?

You can throw everything as an exception. I _think_ that is frowned upon
these days, but it is there so it will happen.

However, you can use

import sys

try:
   raise "foo"
except:
   print sys.exc_info()[1]


to get a hold on what's being caught by the exception handler.

Diez


From rays at blue-cove.com  Mon Feb 20 11:37:59 2006
From: rays at blue-cove.com (RayS)
Date: Mon, 20 Feb 2006 08:37:59 -0800
Subject: Req. for module style/organization
In-Reply-To: <mailman.7161.1140396138.27774.python-list@python.org>
References: <mailman.7161.1140396138.27774.python-list@python.org>
Message-ID: <6.2.3.4.2.20060220075201.02b59100@blue-cove.com>

Thanks Ziga,

At 04:42 PM 2/19/2006, you wrote:
>RayS wrote:
> > I realize that I need to make some changes to follow
> > http://www.python.org/doc/essays/styleguide.html
> > better. Does anyone have an appropriate URL for me to follow for this
> > task? Is one of the C-module guides appropriate?
> >
>
>There are two informal Python Enhancements Proposals:
>Style Guide for C Code - http://www.python.org/peps/pep-0007.html
>Style Guide for Python Code - http://www.python.org/peps/pep-0008.html

Thanks, those are helpful and show that I should do some editing throughout.

The
import .moduleName
for relative imports might come into play, as each of the modules of 
the package require the use of LXSerial (oops, I mean: lxserial.Serial :-) )

Given the example structure from Guido:
http://www.python.org/peps/pep-0328.html#guido-s-decision
package/
     __init__.py
     subpackage1/
         __init__.py
         moduleX.py
         moduleY.py
     moduleA.py

seems like it would be appropriate here, but I still need to decide 
on the appropriate hierarchy within the package.
Should it be
lx200/
     __init__.py
     devices/
         __init__.py
         drive.py
         focuser.py
     lxserial.py

which reflects usage hierarchy, or

lx200/
     __init__.py
     drive.py
     focuser.py
     lxserial.py

which is simpler...

I still don't see a consistent rationale where some packages have 
empty __init__.py with all the init stuff in the modules, and others don't.

And then there's the large-ish modules like wxPyPlot that have almost 
everything in one module - I assume that is discouraged.

Thanks for the info,
Ray



From steve at holdenweb.com  Sat Feb 18 03:33:09 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 18 Feb 2006 03:33:09 -0500
Subject: embedding python in HTML
In-Reply-To: <43f4f98e$0$16930$636a55ce@news.free.fr>
References: <GD5Jf.1637$No6.38292@news.tufts.edu>	<t6q9v1p2qcr0ntsau8i6q5glk89pfb4epq@4ax.com>	<8n6Jf.1640$No6.38203@news.tufts.edu>
	<43f4f98e$0$16930$636a55ce@news.free.fr>
Message-ID: <dt6m3u$vas$1@sea.gmane.org>

bruno at modulix wrote:
> John Salerno wrote:
> 
>>Rene Pijlman wrote:
>>
>>
>>>John Salerno:
>>>[Python alternative for PHP]
>>>
>>>
>>>>So to do this with Python, do I simply integrate it into the HTML as
>>>>above, with no extra steps? 
>>>
>>>
>>>You'd need something like the PHP engine, that understands Python rather
>>>than PHP.
>>
>>
>>My web server can run Python, fortunately. Now that they've turned it on
>>for me, I wanted to try it out, but I didn't know how to go about
>>writing a bit of code to stick into an HTML file.
> 
> 
> You've got to understand that Python is *not* a 'ServerPage' language
> (-> php, asp, jsp etc) in itself. Your server can now run python, fine,
> but *how* ? CGI ? FastCGI ? mod_python ? other ? (hint: it's probably
> just plain old CGI...)
> 
> 
It's not an Active Scripting language by default after installation of 
the win32all extensions, but it can be made one, giving it access to 
Request, Response and the other usual suspects in the ASP environment.

This wouldn't be my preferred way to use it, but (for example) it allows 
you to include Python sources in VBScript pages and have your VBScript 
code call Python functions and procedures. This alone is sometimes 
worthwhile.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From debl2_nospammy at verizon.net  Sun Feb 26 15:24:09 2006
From: debl2_nospammy at verizon.net (David)
Date: Sun, 26 Feb 2006 20:24:09 GMT
Subject: How can I find the remainder when dividing 2 integers
In-Reply-To: <1140984473.723258.70050@e56g2000cwe.googlegroups.com>
References: <1140984473.723258.70050@e56g2000cwe.googlegroups.com>
Message-ID: <J7oMf.1656$d61.735@trnddc05>

silverburgh.meryl at gmail.com wrote:
> I have a string array:
> colors = ["#ff0000", "#00FF00", "#0000FF"]
> colorIndex = 0;
> 
> and I want to loop thru each element of colors
> 
>  for str in strings:
>  print colors[colorIndex++ % colors.length]
> 
> 
> But i get an invalid syntax error when I execute the script:
>     print colors[colorIndex++ % colors.length]
>                               ^
> SyntaxError: invalid syntax
> 
The syntax error comes from your use of the ++ operator not the modulo 
operator.  The ++ operator is not valid in python.

david lees


From nir at digitalpeers.com  Wed Feb  8 02:46:43 2006
From: nir at digitalpeers.com (Nir Aides)
Date: Wed, 08 Feb 2006 09:46:43 +0200
Subject: sys.path and unicode folder names
In-Reply-To: <43e8f3eb$0$7988$9b622d9e@news.freenet.de>
References: <43e8c2ae$1@news.bezeqint.net>
	<43e8f3eb$0$7988$9b622d9e@news.freenet.de>
Message-ID: <43e99e5e@news.bezeqint.net>

I can not restrict the name to CP_ACP.
I am interested in the general case of Unicode.
Windows XP is a native Unicode OS.


Martin v. L?wis wrote:
> Nir Aides wrote:
>> Is there a solution or a work around for the sys.path problem with
>> unicode folder names on Windows XP?
>>
>> I need to be able to import modules from a folder with a non-ascii name.
> 
> If the name is restricted to the CP_ACP code page (i.e. more than ASCII,
> less then full Unicode), using the "mbcs" encoding should work fine.
> 
> Regards,
> Martin


From kay.schluehr at gmx.net  Sun Feb 19 12:47:48 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 19 Feb 2006 09:47:48 -0800
Subject: Python vs. Lisp -- please explain
In-Reply-To: <roy-36D3DC.08084219022006@reader2.panix.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<roy-36D3DC.08084219022006@reader2.panix.com>
Message-ID: <1140371268.315463.232090@g14g2000cwa.googlegroups.com>


Roy Smith wrote:
> DH <no at spam.com> wrote:
> > -python has true closures (although nothing like ruby's blocks)
>
> What is a "true closure"?  Or, maybe what I'm asking is what kind of
> closure wouldn't be a true closure?  Is there some kind of ersatz closure
> other language try to pass off, in violation of truth in closure laws?

A "true closure" is what Python doesn't have ;)

If you enclose variables in a certain functional context in which they
are not defined they are turned into something immutable in Python.
Assigning a value to the same name creates a new object instead of
rebinding the old name. This "readonly" semantics confuses many
programmers coming from other languages at least all Lispers/Schemers
I've talked to. Python does not provide a rebinding operator for free
variables by BDFL decision.

Kay



From onurb at xiludom.gro  Tue Feb 14 07:03:17 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Tue, 14 Feb 2006 13:03:17 +0100
Subject: Unexpected behaviour of getattr(obj, __dict__)
In-Reply-To: <pan.2006.02.14.11.36.28.723688@REMOVETHIScyber.com.au>
References: <pan.2006.02.14.11.36.28.723688@REMOVETHIScyber.com.au>
Message-ID: <43f1c722$0$17400$626a54ce@news.free.fr>

Steven D'Aprano wrote:
> I came across this unexpected behaviour of getattr for new style classes.
> Example:
> 
> 
>>>>class Parrot(object):
> 
> ...     thing = [1,2,3]
> ...
> 
>>>>getattr(Parrot, "thing") is Parrot.thing
> 
> True
> 
>>>>getattr(Parrot, "__dict__") is Parrot.__dict__
> 
> False


hint:
>>> getattr(object, '__dict__')
<dictproxy object at 0x2aaaaab2ff30>


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From Matt  Sun Feb 19 22:15:49 2006
From: Matt (Matt)
Date: Mon, 20 Feb 2006 03:15:49 GMT
Subject: Komodo - Will it Lock Me In?
Message-ID: <yEncExpress_Rulz!_www.techsono.com_3223250150@firstva.com>

"Ravi Teja" <webraviteja at gmail.com> wrote:

>Matt, in most cases, installing packages in Python is about as easy as
>it gets. 

Yes, it is easy, sort-of. I have installed many, many packages so far. My 
point is that with a polished IDE, you don't have to go through all of this. 
You download an installer, run it, start up the IDE and start writing code. 
There are many such RAD tools. I would like such a thing for Python. I've 
spent several days installing package after package, everything from Eclipse 
to py2app, and I still don't have a good development environment. It seems 
that one must be a Python expert before he can write his first simple 
hello-world app.

My goal was to test out Python by writing a simple GUI app and then deploying 
it to Mac OS X and Windows XP. Using a product such as RealBasic, a totally 
green newbie could accomplish this in a few minutes.. So, I guess my main 
question is, is there such a RAD tool for Python?

Thanks,
Matt





From larry.bates at websafe.com  Mon Feb 27 07:06:48 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 27 Feb 2006 06:06:48 -0600
Subject: including directories with py2exe
In-Reply-To: <1140978949.134275.226950@t39g2000cwt.googlegroups.com>
References: <1140978949.134275.226950@t39g2000cwt.googlegroups.com>
Message-ID: <4402EB58.4000907@websafe.com>

Mr BigSmoke wrote:
> Hi All
> how do i include directories into my project when using py2exe? I have
> a module that has it's images directory and when it's searches it (into
> ../dist/library.zip/.../mymodule/) it generates an error because the
> directory wasn't imported...
> tnx
> 
> Fabio
> 
You may want to post to the py2exe-specific newsgroup at
gmane.comp.python.py2exe.

-Larry Bates


From ken.carlino at gmail.com  Sun Feb 26 16:44:32 2006
From: ken.carlino at gmail.com (ken.carlino at gmail.com)
Date: 26 Feb 2006 13:44:32 -0800
Subject: python newbie question
Message-ID: <1140990272.596746.150530@e56g2000cwe.googlegroups.com>

I am new to python, can you please tell me how can I convert my python
script into an executable on linux?
i.e. instead of typing 'python myscript.py abc', I just need to do
'myscript.py abc'?
and how can I get the input argument from my script , in my example,
how can I read 'abc'?

Thank you.



From felipe.lessa at gmail.com  Sun Feb 12 06:55:33 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sun, 12 Feb 2006 09:55:33 -0200
Subject: Is python very slow compared to C
In-Reply-To: <1139742200.155197.245490@g14g2000cwa.googlegroups.com>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
Message-ID: <1139745333.3967.7.camel@kenshin>

Em Dom, 2006-02-12 ?s 03:03 -0800, bearophileHUGS at lycos.com escreveu:
> Probably every answer I can give you is wrong for you, so answering is
> almost useless... In this thread we have already given the most
> pertinent answers to the original question from Diffuse.
> I can show you this page, but I think this is useless too for you:
> http://shootout.alioth.debian.org/gp4/benchmark.php?test=all?=python&lang2=ocaml

What they were saying is that at most of the times your program is going
to sit and wait for things like network, hard drive, user input, etc.,
and these cannot be changed by any language. Those benchmarks test only
raw CPU performance.

Yes, sometimes you *need* raw CPU power, but nobody said that in this
case Python is good for you. Python is good at making your life as a
programmer easier, and every Python programmer knows that.

I wanted to see PyRex or C modules versions of that benchmarks, it would
be really nice. This is the approach used to create fast CPU-bound
algorithms in Python, and as such should be tested as thoroughly as
those Python-only counterparts.

And if it matters for you: Google says Python is fast for them, what
else do you want?

Cya,
Felipe. 

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From gdamjan at gmail.com  Wed Feb  8 20:02:15 2006
From: gdamjan at gmail.com (Damjan)
Date: 8 Feb 2006 17:02:15 -0800
Subject: Problem with curses and UTF-8
In-Reply-To: <mailman.1631.1139438813.27775.python-list@python.org>
References: <mailman.1566.1139345769.27775.python-list@python.org>
	<43E9234B.6030108@v.loewis.de> <11ujl0hof3fql62@corp.supernews.com>
	<mailman.1617.1139425534.27775.python-list@python.org>
	<43EA6238.6040004@v.loewis.de>
	<mailman.1631.1139438813.27775.python-list@python.org>
Message-ID: <1139446935.221566.287710@g43g2000cwa.googlegroups.com>

I just recompiled my python to link to ncursesw, and tried your example
with a little modification:

import curses, locale
locale.setlocale(locale.LC_ALL, '')
s = curses.initscr()
s.addstr(u'\u00c5 U+00C5 LATIN CAPITAL LETTER A WITH RING
ABOVE\n'.encode('utf-8') )
s.addstr(u'\u00f5 U+00F5 LATIN SMALL LETTER O WITH
TILDE\n'.encode('utf-8'))
s.refresh()
s.getstr()
curses.endwin()

And it works ok for me, Slackware-10.2, python-2.4.2, ncurses-5.4 all
in KDE's konsole.
My locale is mk_MK.UTF-8.

Now it would be great if python's curses module worked with unicode
strings directly.



From stewart.midwinter at gmail.com  Sat Feb 11 20:04:54 2006
From: stewart.midwinter at gmail.com (stewart.midwinter at gmail.com)
Date: 11 Feb 2006 17:04:54 -0800
Subject: installing python on a server?
In-Reply-To: <mbssu1h9atu6i8h2o311932nbksbkmeluh@4ax.com>
References: <PB6Hf.1596$No6.37972@news.tufts.edu>
	<hntpu1pmctfaa61ns32k539nisvvljd96n@4ax.com>
	<DV6Hf.1597$No6.37987@news.tufts.edu>
	<1139610715.439681.185510@g44g2000cwa.googlegroups.com>
	<dvCdnRdmMdre43DeRVn-gw@rcn.net>
	<21bsu1dpb4nabbq04fdpubkidj23dh379j@4ax.com>
	<RuWdnViaD4SI3HPeRVn-tw@rcn.net>
	<mbssu1h9atu6i8h2o311932nbksbkmeluh@4ax.com>
Message-ID: <1139706294.331711.109520@f14g2000cwb.googlegroups.com>

I'm wondering whether you couldnn't use MovPy for this purpose - a
situation where you don't have root access.  You can install the whole
MovPy package in your home directory; it provides a self-contained
environment.   At the moment I think it only runs on Windows boxen, but
that may change.



From gregpinero at gmail.com  Fri Feb 17 16:08:46 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Fri, 17 Feb 2006 16:08:46 -0500
Subject: Add a month
In-Reply-To: <1140178539.803209.84960@g47g2000cwa.googlegroups.com>
References: <1140173540.686250.205760@g44g2000cwa.googlegroups.com>
	<mailman.2046.1140175284.27775.python-list@python.org>
	<1140178539.803209.84960@g47g2000cwa.googlegroups.com>
Message-ID: <312cfe2b0602171308j2e6ed284t2c5dd2c130166db1@mail.gmail.com>

Here's how I do it:

def monthify(anint):
    if anint%12==0:return 12
    else:return anint%12

import datetime
d=datetime.datetime.today()
dplus1month=datetime.datetime(d.year,monthify(d.month+1),d.day)

We need monthify because adding 1 to 12 is bad otherwise!

-Greg

On 17 Feb 2006 04:15:39 -0800, Paul Boddie <paul at boddie.org.uk> wrote:
> Fredrik Lundh wrote:
> >
> > what do you expect d_new to be after the operation ?  if the answer
> > is date(2006,3,17), what's date(2006,1,31) plus one month?
>
> February 31st, of course:
>
> http://sql-info.de/mysql/gotchas.html#1_14
>
> ;-)
>
> Paul
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


--
Gregory Pi?ero
Chief Innovation Officer
Blended Technologies
(www.blendedtechnologies.com)


From user at example.net  Sat Feb  4 14:23:30 2006
From: user at example.net (pyluke)
Date: Sat, 04 Feb 2006 19:23:30 GMT
Subject: re.search slashes
In-Reply-To: <ds2sj2$kqh$1@aphrodite.grec.isp.9tel.net>
References: <Yj4Ff.746690$x96.167598@attbi_s72> <43e4f066$1@nntp0.pdx.net>
	<ds2sj2$kqh$1@aphrodite.grec.isp.9tel.net>
Message-ID: <Sa7Ff.754531$_o.648300@attbi_s71>


> 2. Read the module's documentation. Several time. In your case read the 
> "negative lookbehind assertion" part "(?<! ... )" several time, until 
> you understand how it may be of use to you.

OK.  lookbehind would be more useful/suitable here...


From wolfgang.keller.nospam at gmx.de  Mon Feb 13 16:54:30 2006
From: wolfgang.keller.nospam at gmx.de (Wolfgang Keller)
Date: Mon, 13 Feb 2006 22:54:30 +0100
Subject: ANN: PyGUI 1.6
In-Reply-To: <mailman.1780.1139755064.27775.python-announce-list@python.org>
Message-ID: <0001HW.C016BEA60088EC87F01B03B0@mail.gmx.net>

Hello,

On Sun, 12 Feb 2006 07:50:56 +0100, greg wrote
(in article <mailman.1780.1139755064.27775.python-announce-list at python.org>):
> PyGUI is an experimental highly-Pythonic cross-platform
> GUI API.

How "experimental" (or useable for productivity applications) would you 
consider it compared to e.g. wxwidgets?

And, btw; I couldn't immediately figure out from the documentation which 
widgets it supports. Does it support the Cocoa outline view, for example?

TIA,

Sincerely,

Wolfgang Keller



From kent at kentsjohnson.com  Thu Feb 23 20:14:26 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Thu, 23 Feb 2006 20:14:26 -0500
Subject: What's up with this code?
In-Reply-To: <1140739486.369708.279370@u72g2000cwu.googlegroups.com>
References: <1140649331.924736.128420@g43g2000cwa.googlegroups.com>
	<43fd08cf$1@nntp0.pdx.net>
	<1140699277.658249.280130@u72g2000cwu.googlegroups.com>
	<1140700754.171942.70530@o13g2000cwo.googlegroups.com>
	<43fe3e65$1@nntp0.pdx.net>
	<1140739486.369708.279370@u72g2000cwu.googlegroups.com>
Message-ID: <43fe5967$1_1@newspeer2.tds.net>

Gregory Petrosyan wrote:
> Again, thanks a lot!
> I'm optimising my polynomial module as hard as possible, because when
> it used native floats/integers it was very fast, but in some specific
> cases -- too inaccurate. So, I migrated to decimals, and module began
> to be very slow. Current success is nearly 4x speedup, and now it seems
> to me that decimals are the bottleneck. Is anybody working on C version
> of decimals? Is it a really hard work? (I am thinking about
> re-implementing decimals in C by myself)

Maybe gmpy would help?
http://gmpy.sourceforge.net/

Kent


From tim.leeuwvander at nl.unisys.com  Tue Feb 14 05:56:09 2006
From: tim.leeuwvander at nl.unisys.com (Tim N. van der Leeuw)
Date: 14 Feb 2006 02:56:09 -0800
Subject: 88k regex = RuntimeError
In-Reply-To: <1139900873.361930.135880@g44g2000cwa.googlegroups.com>
References: <1139900873.361930.135880@g44g2000cwa.googlegroups.com>
Message-ID: <1139914569.638962.94820@g43g2000cwa.googlegroups.com>

Why don't you create a regex that finds for you all C function
declarations (and which returns you the function-names); apply
re.findall() to all files with that regex; and then check those
funtion-names against the set of allSupported?

You might even be able to find a regex for C funtion declarations on
the web.

Your gAllSupported can be a set(); you can then create the intersection
between gAllSupported and the function-names found by your regex.

Cheers,

--Tim



From riklaunim at gmail.com  Mon Feb 27 14:17:21 2006
From: riklaunim at gmail.com (=?ISO-8859-2?Q?piotr_mali=F1ski?=)
Date: Mon, 27 Feb 2006 19:17:21 +0000
Subject: converting binary data
Message-ID: <1f7f7cf70602271117s36a26999n@mail.gmail.com>

I have a game file described here:
http://iesdp.gibberlings3.net/ieformats/itm_v1.htm and I'm trying to read
all the data:
############################
plik = open('bow08.itm', 'rb')
try:
        tekst = plik.read()
finally:
        plik.close()

# char array - works
print tekst[0x0004:0x0004+4]
# resref - works
print tekst[0x003a:0x003a+8]

#dword - binary something, doesn't work
print tekst[0x004c:0x004c+4]
##############################
The dword and many other variables are binary code and I don't know how to
convert them into "normal" data. NearInfinity, app written in Java converts
dword and friends in this way:
##############################
public static int convertInt(byte buffer[], int offset)
  {
    int value = 0;
    for (int i = 3; i >= 0; i--)
      value = (value << 8) | (buffer[offset + i] & 0xFF);
    return value;
  }
##############################
How to pythonize this code, or make something in python to read the data
from Baldurs Gate files ? :)
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From dylan.moreland at gmail.com  Thu Feb  9 21:08:04 2006
From: dylan.moreland at gmail.com (Dylan Moreland)
Date: 9 Feb 2006 18:08:04 -0800
Subject: Newbie Q: dynamically assigning object attribute
In-Reply-To: <1139536164.525526.210610@g14g2000cwa.googlegroups.com>
References: <1139535715.486234.195690@g44g2000cwa.googlegroups.com>
	<1139535868.984020.204620@g44g2000cwa.googlegroups.com>
	<1139536164.525526.210610@g14g2000cwa.googlegroups.com>
Message-ID: <1139537284.389441.225430@o13g2000cwo.googlegroups.com>

No problem. There are, in fact, ugly class-based methods of doing this.
You could assign to an instance's __dict__ dictionary, or -- if the
class is a new-style class -- you can call the __setattr__(self, name,
value) method.



From kmkz89 at gmail.com  Fri Feb 17 17:41:38 2006
From: kmkz89 at gmail.com (kmkz)
Date: 17 Feb 2006 14:41:38 -0800
Subject: python spawn new process, rout stdin/out
In-Reply-To: <1140215344.231777.242000@o13g2000cwo.googlegroups.com>
References: <1139523177.415107.291710@g47g2000cwa.googlegroups.com>
	<BARGf.3747$MJ.3489@fed1read07>
	<1140215344.231777.242000@o13g2000cwo.googlegroups.com>
Message-ID: <1140216097.959490.306620@o13g2000cwo.googlegroups.com>

ok solved that by using the call() method

I now have a bigger problem: the executable always wants to open in its
own window. how do I stop this?



From tim.leeuwvander at nl.unisys.com  Thu Feb  2 08:50:10 2006
From: tim.leeuwvander at nl.unisys.com (Tim N. van der Leeuw)
Date: 2 Feb 2006 05:50:10 -0800
Subject: OO conventions
In-Reply-To: <mailman.1336.1138835495.27775.python-list@python.org>
References: <mailman.1334.1138833641.27775.python-list@python.org>
	<pan.2006.02.01.23.03.37.881298@zetafunc.net>
	<mailman.1336.1138835495.27775.python-list@python.org>
Message-ID: <1138888210.827054.68690@g49g2000cwa.googlegroups.com>


Daniel Nogradi wrote:
> >
> > In this case, Image seems to be a python module, with the open function
> > defined, PIL's Image is not a class.
> >
>
> Thanks for the enlightening remarks, especially this last one, indeed,
> it's not a class.

Actually, this way of creating a class instance is good OO practice in
many places: The Image.open() method acts as a factory-function for
creating Image objects.
You don't know, until you inspect the return value, if the created
object is actually an instance of class Image or something which just
happens to behave like one...
It could for instance be a sub-class of Image, JpegImage, if that
better suits the class library designers.
In general, factory-functions allow greater uncoupling between
interface and implementation.

Regards,

--Tim



From juho.schultz at helsinki.fi  Wed Feb 15 04:48:32 2006
From: juho.schultz at helsinki.fi (Juho Schultz)
Date: Wed, 15 Feb 2006 11:48:32 +0200
Subject: Python advocacy in scientific computation
In-Reply-To: <1139937227.379829.215090@z14g2000cwz.googlegroups.com>
References: <1139937227.379829.215090@z14g2000cwz.googlegroups.com>
Message-ID: <dsutdg$2ds$1@oravannahka.helsinki.fi>

Michael Tobis wrote:
> Someone asked me to write a brief essay regarding the value-add
> proposition for Python in the Fortran community. Slightly modified to
> remove a few climatology-related specifics, here it is.
> 

Thank you - this was very good reading.

> I would welcome comments and corrections, and would be happy to
> contribute some version of this to the Python website if it is of
> interest.
> 

A slight broadening of the perspective could show another advantage:
Python is also used for data processing, at least in astronomy. Modeling 
and processing the data in the same environment is very practical. Spend 
more time on modeling and processing the critical data sections - 
critical data section may depend on model parameters and sampling (which 
is often incomplete and uneven). You also avoid wasting CPU cycles to 
model things not in the data.

A theorist may be perfectly happy with Fortran, and an observer could do 
his stuff with simple scripts. But if they need to work together, Python 
is a very good option.


From cfbolz at gmx.de  Fri Feb 10 14:46:06 2006
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Fri, 10 Feb 2006 20:46:06 +0100
Subject: is there a better way?
In-Reply-To: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
Message-ID: <dsiqhv$709$1@sea.gmane.org>

Hi!

markscala at gmail.com wrote:
> Problem:
> 
> You have a list of unknown length, such as this: list =
> [X,X,X,O,O,O,O].  You want to extract all and only the X's.  You know
> the X's are all up front and you know that the item after the last X is
> an O, or that the list ends with an X.  There are never O's between
> X's.
> 
> I have been using something like this:
> _____________________
> 
> while list[0] != O:
>     storage.append(list[0])
>     list.pop(0)
>     if len(list) == 0:
>         break
> _____________________
> 
> But this seems ugly to me, and using "while" give me the heebies.  Is
> there a better approach?

Depends on what you mean with "better". I (heavily inspired by the 
bisect module) came up with:

low = 0
high = len(L)
while low < high:
     mid = (low + high) // 2
     if L[mid] == 0:
         high = mid
     else:
         low = mid + 1
storage = L[:low]

This has the advantage to be more efficient compared to other 
approaches, which of course only matters if your list is big. It still 
features a "while" loop, though.

> hope this is clear.

It is not entirely clear what the X is supposed to be. I assumed that it 
can be anything except 0.

Cheers,

Carl Friedrich



From lycka at carmen.se  Fri Feb 17 04:02:33 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 17 Feb 2006 10:02:33 +0100
Subject: Python 3000 deat !? Is true division ever coming ?
In-Reply-To: <mailman.1910.1139939448.27775.python-list@python.org>
References: <1139810036.943598.229030@g47g2000cwa.googlegroups.com>	<1139928242.726349.221080@g44g2000cwa.googlegroups.com>	<mailman.1906.1139933770.27775.python-list@python.org>	<dst1tm$jbb$1@news.doit.wisc.edu>
	<mailman.1910.1139939448.27775.python-list@python.org>
Message-ID: <dt43fa$8p0$1@wake.carmen.se>

Gregory Pi?ero wrote:
> I knew about that approach.  I just wanted less typing :-(

It's enough to introduce one float in the mix.
1.*a/b or float(a)/b if you don't want one more
multiplication.


From neuzhoundxx at yahoo.com  Tue Feb 21 14:40:22 2006
From: neuzhoundxx at yahoo.com (john peter)
Date: Tue, 21 Feb 2006 11:40:22 -0800 (PST)
Subject: interpreting the fractional portion of time.clock() vs time.time(0
	measurements
Message-ID: <20060221194023.77291.qmail@web36708.mail.mud.yahoo.com>

let's say i'm taking timing measurements in Windows XP
   
  t1 = time.clock()
  ...
  t2 = time.clock()
   
  t3 = t2 - t1 = say, 0.018
  what is the unit of measurement for t3? is it correct to say that t3 = 18 milliseconds?
  microsends?
   
  what if the timing function used for t1 and t2 was time.time()? is it still correct to say
  that t3 = 18 milliseconds? i kinda know that in Windows, time.clock() has higher
  resolution than time.time(), and all i need is millisecond resolution. which of these
  functions would be easier to translate into millisecond units of measurement?

		
---------------------------------
 Yahoo! Autos. Looking for a sweet ride? Get pricing, reviews, & more on new and used cars.
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From fakeaddress at nowhere.org  Wed Feb 15 17:58:11 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Wed, 15 Feb 2006 22:58:11 GMT
Subject: Is empty string cached?
In-Reply-To: <cUMIf.11894$MJ.4803@fed1read07>
References: <cUMIf.11894$MJ.4803@fed1read07>
Message-ID: <7mOIf.30432$F_3.30293@newssvr29.news.prodigy.net>

Farshid Lashkari wrote:
> When I pass an empty string to a function is a new string object created 
> or does python use some global pre-created object? I know python does 
> this with integer objects under a certain value. For instance, in the 
> following code is a new string object created for each function call?
> 
> func(0,'')
> func(1,'')
> func(2,'')
> func(3,'')


In this case, the language implementation may either create new
strings or re-use existing ones:

     for immutable types, operations that compute new values
     may actually return a reference to any existing object with
     the same type and value, while for mutable objects this is
     not allowed.
     [http://docs.python.org/ref/objects.html]


[...]
> This leads me to believe that python does reuse existing strings, but 
> once the variables are removed, does the item still exist in the cache?

Either; see the same reference page.


-- 
--Bryan


From a-steinhoff at web.de  Sun Feb 19 15:42:16 2006
From: a-steinhoff at web.de (Armin Steinhoff)
Date: Sun, 19 Feb 2006 21:42:16 +0100
Subject: Python multithreading on cluster system? Embedding python in PVM?
In-Reply-To: <1140363477.929902.44890@g44g2000cwa.googlegroups.com>
References: <1140363477.929902.44890@g44g2000cwa.googlegroups.com>
Message-ID: <dtal57$99u$02$1@news.t-online.com>

abhinav wrote:
> Hi guys.I have read that one cannot perform true multithreading in
> python due to global interpreter lock mechanism.Suppose i have to
> implement a crawler on a say cluster system like clusterknoppix so that
> i can use parallel virtual machine (PVM)for programming in
> multiprocessor environment or say open MPI.Can i integrate python with
> PVM or MPI.Can i embed python into C for programming in multiprocessor
> environment.Is there any way of embedding python in PVM or MPI so that
> i can implement a true cluster based search engine?
> Any help would be very kind.Thanks.
> 


http://pypvm.sourceforge.net

--Armin


From aleaxit at yahoo.com  Sun Feb 26 15:11:19 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 26 Feb 2006 12:11:19 -0800
Subject: How can I redirect print function to an output file?
References: <1140983197.579809.93850@v46g2000cwv.googlegroups.com>
Message-ID: <1hbd8eq.1wy8k0y18r60xvN%aleaxit@yahoo.com>

<Plissken.s at gmail.com> wrote:

> I am using the print function in my python script.
> Can you please tell me what can I do to redirect the output to an file?

f = open('aaaaaaargh', 'w')
print>>f, 'killew wabbit'


Alex


From fuzzyman at gmail.com  Sun Feb 26 18:37:37 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 26 Feb 2006 15:37:37 -0800
Subject: SyntaxError: can't assign to a function call
Message-ID: <1140997057.610226.101220@u72g2000cwu.googlegroups.com>

What gives ?

>>> a = []
>>> def f():
	return a

>>> f()
[]
>>> a.append(3)
>>> f()
[3]
>>> a += [3]
>>> a
[3, 3]
>>> f()
[3, 3]
>>> f() += [4]
SyntaxError: can't assign to function call
>>> 

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml



From aleaxit at yahoo.com  Fri Feb 17 00:54:44 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Thu, 16 Feb 2006 21:54:44 -0800
Subject: days since epoch
References: <1140154082.952039.283420@g43g2000cwa.googlegroups.com>
Message-ID: <1havgu7.1ph0i3k1lpl56cN%aleaxit@yahoo.com>

<eight02645999 at yahoo.com> wrote:

> hi
> how can i get the number of days since epoch using the time module?
> or do i have to manually do the arithmetic?

Try the datetime module -- better suited to computing days, than the
time module, IMHO.


Alex


From steve at REMOVETHIScyber.com.au  Fri Feb 10 08:11:36 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sat, 11 Feb 2006 00:11:36 +1100
Subject: anybody help me
References: <1139568281.905742.172610@o13g2000cwo.googlegroups.com>
Message-ID: <pan.2006.02.10.13.11.35.527527@REMOVETHIScyber.com.au>

On Fri, 10 Feb 2006 02:44:41 -0800, Rahul wrote:

> Hi Everybody
> 
> I have some problem in my script. please help me.

I'll do better: I'll help you help yourself.

First step: what is the problem? Saying "I have a problem" and expecting
us to guess what it is will not give good results.

Second step: what is the ENTIRE traceback you get when you run the script?
Do not write it out by memory -- copy and paste it exactly as Python
prints it.

Third step: do you understand what the traceback is telling you? Hint:
Python almost always knows what you've done wrong. You just have to pay
attention.

Fourth step: if you still can't determine the error, don't expect others
to debug a 1000+ line script. Spend some time cutting the script back to
the smallest possible version that still gives you the same error. This
may even help you understand what the error is.


-- 
Steven.



From apardon at forel.vub.ac.be  Fri Feb  3 07:22:35 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 3 Feb 2006 12:22:35 GMT
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<drvd56$nb3$1@wake.carmen.se>
	<1138967463.440194.184710@g49g2000cwa.googlegroups.com>
Message-ID: <slrndu6iob.qei.apardon@rcpc42.vub.ac.be>

Op 2006-02-03, n.estner at gmx.de schreef <n.estner at gmx.de>:
>> First of all, you are using a really poor example of a "method",
>> since it doesn't use any attributes of the Foo instance.
>
> Agreed. I tried to post a short example, and it obviously was to short
> to make my point clear. lets take a longer one. Current syntax:
>
> class Pair:
>     def __init__(self, a,b):
>         self.a = a
>         self.b = b
>
>     def sum(self):
>         return self.a + self.b
>
>     def product (this):
>         return this.a + this.b
>
> My alternative syntax suggestion would be this one:
>
> class Pair:
>     def self.__init__(a,b):
>         self.a = a
>         self.b = b
>
>     def self.sum():
>         return self.a + self.b
>
>     def this.product ():
>         return this.a + this.b
>
>> You are really giving "self" a magic meaning with your suggestion
>> which isn't needed at all.
>
> No. I hope this is clearer in the example above. "self" shouldn't be a
> keyword. It's a special kind of argument now, so why shouldn't we
> explicitly _declare_ that it's a special kind of argument? (as explicit
> is better than implicit)

Self is not a special kind of argument. It is the accessing of the
method that provides for the magic. Simplified one could say the
following is happening.

def _Pair__init__(self, a, b):
    self.a = a
    self.b = b

def _Pair_sum(self):
    return self.a + self.b

def _Pair_product(this):
    return this.a * this.be

class Pair:

    def __init__(self, ...):
        self.__init__ = BoundMethod(self, _Pair__init__)
        self.sum = BoundMethod(self, _Pair_sum)
        self.product = BoundMethod(self, _Pair_product)
        self.__init__(...)


So when p is an instance of Pair, p.sum is not your defined
function but a BoundMethod.

-- 
Antoon Pardon


From mgedmin at gmail.com  Fri Feb 17 06:22:41 2006
From: mgedmin at gmail.com (Marius Gedminas)
Date: 17 Feb 2006 03:22:41 -0800
Subject: days since epoch
In-Reply-To: <1140154082.952039.283420@g43g2000cwa.googlegroups.com>
References: <1140154082.952039.283420@g43g2000cwa.googlegroups.com>
Message-ID: <1140175361.174851.55690@g43g2000cwa.googlegroups.com>

The datetime module is usually more convenient for date/time
arithmetic.  However in your particular case, you may find the
time.time() function convenient.  It returns the number of seconds
since the epoch.  To get the number of days divide the number of
seconds by 86400.



From steve at REMOVETHIScyber.com.au  Mon Feb 27 06:10:00 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Mon, 27 Feb 2006 22:10:00 +1100
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>
	<4402AB7F.7070804@REMOVEMEcyber.com.au>
	<7xzmkdxkce.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2006.02.27.11.09.59.508427@REMOVETHIScyber.com.au>

On Mon, 27 Feb 2006 00:43:45 -0800, Paul Rubin wrote:

> Steven D'Aprano <steve at REMOVEMEcyber.com.au> writes:
>> What is an empty enum? 
> 
> An empty enum is an enum with no identifiers, just like an empty list
> is a list with no elements.

No, I don't think that is the case. A list is a container. You can take
the elements away and still have the container left. But an enum is not a
container. Take the enumerated values away, and you don't have an empty
enum left, you have nothing left.

All of the machinery of the enum class created by Ben Finney is just to
make sure that red, green and blue behave correctly, without extraneous
string-like or number-like methods. Of course Ben could modify his code so
that enum() returned an object. But to my mind, that would be like
creating an empty integer. Not zero -- zero is a perfectly good integer.
An empty integer, one with no bits. Yes, you could create a wrapper class
that did that. But why would you want to, and even if you did, in what
sense is the result still an integer?



>> How and when would you use it?
> 
>> The best I can come up with is that an empty enum would be the
>> enumerated values you have when you don't actually have any enumerated
>> values. This is not to be confused with an empty list: an empty list
>> is a well-defined concept. It is just a list (a container) with
>> nothing in it. A list of X is like a box containing X, and like boxes,
>> an empty list (or set, or dict) is meaningful. An enum of X is just
>> the Xs themselves. If there is no X, there is nothing there.
> 
> An enum X is a datatype and if the enum is empty then there are no
> values for that type.  There's nothing wrong with that.

Then you would be happy with empty longints that are distinct from zero?
An empty enum() is like a bitless integer. 


>     def print_members(header, e):  # print header, then members of enum e
>       print header
>       for m in e:
>         print '\t', str(m)
> 
>     months_longer_than_february = enum('jan', 'mar', 'apr', ) # etc
>     months_shorter_than_february = enum()
> 
>     print_members('shorter:', months_shorter_than_february)
>     print_members('longer:', months_longer_than_february)
> 
> should do the obvious thing.

Obvious, but meaningless.

Sure, if we were talking about the LIST of months shorter than February,
or the SET of cows with feathers, I would absolutely agree with you. But
think about how enums are handled in other languages, e.g. Pascal and C:

type:
  fruit = (banana, apple, orange);

enum { banana, apple, orange } fruit; 

As far as I know, neither Pascal nor C allow empty enums. And even if they
did, what and how would you use them for?

type 
  shortmonth = (); {Months shorter than February}
var
  x: shortmonth;
begin
  x := ; {empty right hand side of the expression}


Think about the Python usage:

>>> fruit = Enum('apple', 'banana', 'orange')
>>> snack = fruit[2]

fruit is just a holder, if you will, allowing us to access the enums.

>>> snack == fruit.apple
False
>>> snack == fruit.banana
False
>>> snack == fruit.orange
True

fruit just exists because of limitations of Python's syntax. What we'd
really like to do is this:

>>> # create enums in the current namespace
>>> Enum('apple', 'banana', 'orange')
>>> snack = orange
>>> snack == apple
False
>>> snack == banana
False
>>> snack == orange
True

but that is too hard to do in Python. Hence we need some sort of
higher-order object to carry the enums around. But that higher order
object is not an enum, despite the name. The enums are attributes of the
higher order object: apple, banana, orange. fruit is just the scaffolding.



> Hmm, I also see the PEP doesn't specify what's supposed to happen with
> 
>   Weekdays = enum('sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat')
>   Solar_system = enum('sun', 'mercury', 'venus', 'earth',)  # etc.
>   print Weekdays.sun == Solar_system.sun
> 
> so that's another shortcoming with the PEP. 


If I recall earlier posts from Ben, enums with the same label from
different enumerations should compare as different.


>> But if you have a good usage case for an empty enum, please feel free
>> to tell us.
> 
> Do you have a good usage case for the number
> 647574296340241173406516439806634217274336603815968998799147348150763731 ?

Of course. If you have a book with
647574296340241173406516439806634217274336603815968998799147348150763732
pages, then the last-but-one page will be numbered with the number you are
asking about.

Your example demonstrates that you don't understand my point. I'm not
objecting to any specific group of enums. I'm saying that a group of
enumerated values without any enumerated values is not anything at all.



> If not, maybe we should modify Python so that all arithmetic operations
> throw exceptions if they ever encounter that number.  It's unlikely to
> ever happen (that number came from os.urandom).  
> 
> The issue is that Python operations should work uniformly on all values
> that make sense.  

Absolutely. 

> Set operations should work on the empty set.

Correct.

> Addition should work on zero.

Agreed 100%.

> Enums with no members are similarly perfectly valid
> and should work.

Nope, not at all. Enums with no members aren't anything at all. They are
like a book with no pages and no cover, a boiled egg without the egg. You
can't shell an egg that isn't there.


> Kernighan and Plauger in "Software Tools" explained it,
> "Make sure your code 'does nothing' gracefully".

Which is excellent advice, for code for which doing nothing is a
meaningful operation. Enums is not one of those cases.



-- 
Steven.



From kmkz89 at gmail.com  Thu Feb  9 17:12:57 2006
From: kmkz89 at gmail.com (kmkz89 at gmail.com)
Date: 9 Feb 2006 14:12:57 -0800
Subject: python spawn new process, rout stdin/out
Message-ID: <1139523177.415107.291710@g47g2000cwa.googlegroups.com>

Hi,

I'm trying to make a program that acts as an intermediate between the
user and another executable. When my python program is executed, I
would like another .exe to be spawned within the python program, and
the stdin/stdout to be routed from the user to the program. So if my
program is booted into a console window, anything typed by the user
will be passed to the subprocess and any output from that executable
will appear in the console, showing the user what happened. In
addition, when the python program is closed, the subprocess should be
closed.

Any ideas how to do this? I am far from a Python newbie but I know
little to nothing about os.*/subprocess.* so I need quite a bit of
assistance.

Thanks guys!
kmkz



From brett at python.org  Mon Feb 13 02:25:30 2006
From: brett at python.org (Brett Cannon)
Date: Sun, 12 Feb 2006 23:25:30 -0800
Subject: ordered sets operations on lists..
In-Reply-To: <1139805374.7547.24.camel@kenshin>
References: <mailman.1722.1139590689.27775.python-list@python.org>
	<1139592166.993686.212000@f14g2000cwb.googlegroups.com>
	<1139599834.975607.77180@f14g2000cwb.googlegroups.com>
	<1halbdx.dd0p1l1obawfkN%aleaxit@yahoo.com>
	<43ef8e5f.625119424@news.oz.net>
	<1hana3d.1bwbt4c1esela5N%aleaxit@yahoo.com>
	<43F007F9.3090103@holdenweb.com> <1139805374.7547.24.camel@kenshin>
Message-ID: <bbaeab100602122325p47160c17t9f44e3479c52afab@mail.gmail.com>

On 2/12/06, Felipe Almeida Lessa <felipe.lessa at gmail.com> wrote:
> Em Dom, 2006-02-12 ?s 23:15 -0500, Steve Holden escreveu:
> > Given that Python 2.4 doesn't even perform simple constant folding for
> > arithmetic expressions
> > [snip]
>
> May I ask why doesn't it perform such optimization? Is there any special
> difficulties in doing so with the Python compiler?

It does in 2.5 thanks to Raymond Hettinger:

>>> import dis
[18110 refs]
>>> def simple(): print 1+2
...
[18136 refs]
>>> dis.dis(simple)
  1           0 LOAD_CONST               3 (3)
              3 PRINT_ITEM
              4 PRINT_NEWLINE
              5 LOAD_CONST               0 (None)
              8 RETURN_VALUE
[18635 refs]
>>>

Simple, low-hanging fruit like this are covered by the peephole
optimizer already.  Anything more complex, though, is difficult thanks
to things being so dynamic and thus not easy to guarantee to be
correct between compile-time and run-time.

-Brett

From chrism at plope.com  Wed Feb  8 11:22:36 2006
From: chrism at plope.com (Chris McDonough)
Date: Wed, 08 Feb 2006 11:22:36 -0500
Subject: encoding during elementtree serialization
Message-ID: <pVoGf.271$6G.183@dukeread03>

ElementTree's XML serialization routine implied by tree._write(file, 
node, encoding, namespaces looks like this (elided):

     def _write(self, file, node, encoding, namespaces):
         # write XML to file
         tag = node.tag
         if tag is Comment:
             file.write("<!-- %s -->" % _escape_cdata(node.text, encoding))
         elif tag is ProcessingInstruction:
             file.write("<?%s?>" % _escape_cdata(node.text, encoding))
         else:
...
             file.write("<" + _encode(tag, encoding))
             if items or xmlns_items:
                 items.sort() # lexical order

Note that "_escape_cdata" (which also performs encoding) and "_encode" 
are called for pcdata (and attribute values) only, but not for the tag 
literals like "<" and "<?%s?>".

In some profiling I've done, I believe encoding during recursion makes 
serialization slightly slower than it could be if we could get away with 
not encoding any pcdata or attribute values during recursion.

Instead, we might be able to get away with encoding everything just once 
at the end.  But I don't know if this is kosher.  Is there any reason to 
not also encode tag literals and quotation marks that are attribute 
containers, just once, at the end of serialization?

Even if that's not acceptable in general because tag literals cannot be 
encoded, would it be acceptable for "ascii-compatible" encodings like 
utf-8, latin-1, and friends?

Something like:

def _escape_cdata(text, encoding=None, replace=string.replace):
     # doesn't do any encoding
     text = replace(text, "&", "&amp;")
     text = replace(text, "<", "&lt;")
     text = replace(text, ">", "&gt;")
     return text

class _ElementInterface:

     ...

     def write(self, file, encoding="us-ascii"):
         assert self._root is not None
         if not hasattr(file, "write"):
             file = open(file, "wb")
         if not encoding:
             encoding = "us-ascii"
         elif encoding != "utf-8" and encoding != "us-ascii":
             file.write("<?xml version='1.0' encoding='%s'?>\n" % encoding)
         tmp = StringIO()
         self._write(tmp, self._root, encoding, {})
         file.write(tmp.getvalue().encode(encoding))


     def _write(self, file, node, encoding, namespaces):
         # write XML to file
         tag = node.tag
         if tag is Comment:
             file.write("<!-- %s -->" % _escape_cdata(node.text, encoding))
         elif tag is ProcessingInstruction:
             file.write("<?%s?>" % _escape_cdata(node.text, encoding))
         else:
             items = node.items()
             xmlns_items = [] # new namespaces in this scope
             try:
                 if isinstance(tag, QName) or tag[:1] == "{":
                     tag, xmlns = fixtag(tag, namespaces)
                     if xmlns: xmlns_items.append(xmlns)
             except TypeError:
                 _raise_serialization_error(tag)
             file.write("<" + tag)


I smell the mention of a Byte Order Mark coming on. ;-)


From douceur at gmail.com  Sun Feb  5 14:33:11 2006
From: douceur at gmail.com (Jared Russell)
Date: 5 Feb 2006 11:33:11 -0800
Subject: wxPython Conventions
References: <1138684467.864196.212400@f14g2000cwb.googlegroups.com>
	<1138784799.435953.251980@g43g2000cwa.googlegroups.com>
	<1138789898.121989.83990@f14g2000cwb.googlegroups.com>
Message-ID: <1139167991.181490.257550@g44g2000cwa.googlegroups.com>

Thanks for all the replies.  I'm admittedly new to GUI programming, so
I'm making sure to read up on the MVC pattern and related things like
the observer pattern.  I appreciate the help.

Jared



From mfranklin1 at gatwick.westerngeco.slb.com  Fri Feb 24 10:22:58 2006
From: mfranklin1 at gatwick.westerngeco.slb.com (Martin Franklin)
Date: Fri, 24 Feb 2006 15:22:58 +0000
Subject: Tkinter canvas size determination
In-Reply-To: <43FF22FB.5000407@rpcl.com>
References: <43FC9532.2050800@rpcl.com> <lvjuc3-ph7.ln1@lairds.us>
	<43FF22FB.5000407@rpcl.com>
Message-ID: <43FF24D2.2040809@gatwick.westerngeco.slb.com>

Dean Allen Provins wrote:
> Cameron:
> 
> Cameron Laird wrote:
>> In article <43FC9532.2050800 at rpcl.com>,
>> Dean Allen Provins  <dprovins at rpcl.com> wrote:
>>
>>> I need to determine the size of a canvas while the process is running.
>>> Does anyone know of a technique that will let me do that?
>> 			.
>> 			.
>> 			.
>> Does
>>   >>> import Tkinter
>>   >>> c = Tkinter.Canvas()
>>   >>> c.create_oval(13, 51, 80, 130)
>>   1
>>   >>> c.pack()
>>   >>> print c.cget("width")
>>   284
>> help?
>>
>> There are actually several different notions of the size of a
>> canvas.  The example abovve should be a good starting point,
>> though.  
>>
>> There's also a mailing list specifically for Tkinter <URL:
>> http://tkinter.unpythonic.net/wiki/mailing_20lists  >; that
>> might interest you.
> 
> I tried the "cget" function, and it returned the width that I had used
> when creating the canvas - even though the canvas was wider than that
> value at display time (and also after manually resizing the window).
> 
> To your knowledge, is there a method to determine the current dimensions?
> 
> Thanks,
> 
> Dean


Dean,

Look at the winfo_* methods of Tkinter widgets, I think the one you want 
is called winfo_reqheight / winfo_reqwidth or something very similar
pydoc Tkinter.Canvas will sort that out

Martin












From flashkNO at SPAMgmail.com  Wed Feb 15 23:40:22 2006
From: flashkNO at SPAMgmail.com (Farshid Lashkari)
Date: Wed, 15 Feb 2006 20:40:22 -0800
Subject: Is empty string cached?
In-Reply-To: <mailman.1987.1140063326.27775.python-list@python.org>
References: <cUMIf.11894$MJ.4803@fed1read07>	<mailman.1981.1140057796.27775.python-list@python.org>	<tgSIf.12036$MJ.8017@fed1read07>	<mailman.1982.1140061103.27775.python-list@python.org>	<WCSIf.12038$MJ.252@fed1read07>
	<mailman.1987.1140063326.27775.python-list@python.org>
Message-ID: <3mTIf.12044$MJ.4759@fed1read07>

> It just boils down to either a LOAD_CONST vs. a LOAD_NAME - either way 
> the string isn't duplicated.

Great, that's exactly what I wanted to know. Thanks Steve!

-Farshid


From spwpreston at gmail.com  Tue Feb  7 15:28:30 2006
From: spwpreston at gmail.com (S Borg)
Date: 7 Feb 2006 12:28:30 -0800
Subject: Python Class use
Message-ID: <1139344110.219073.244830@f14g2000cwb.googlegroups.com>


 Hello,

 I am running Python on Mac OS X. The interpreter has been great for
learning the basics, but I would now like to be able to reuse code.
How do I write reusable code? I have done it "The Java way": write
the class, and save it to my home directory, then call it from the
interpreter, here is an example.

########my saved file######
class MyClass:
  def f(self):
      return 'calling f from MyClass'

#######interpreter#########
>>> x = MyClass()
>>> (unhelpful error mesages)

I hope I have clearly explained my problem. Because I
don't know the solution top this, I have to rewrite my methods
in the interpreter every single time I need to change something, and
I am quite certain that that is not the best way to do it.

Thank you very much.

S



From steve at REMOVETHIScyber.com.au  Sat Feb 11 20:03:11 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sun, 12 Feb 2006 12:03:11 +1100
Subject: Is python very slow compared to C
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
Message-ID: <pan.2006.02.12.01.03.10.918456@REMOVETHIScyber.com.au>

On Sat, 11 Feb 2006 12:49:32 -0800, diffuser78 wrote:

> I have just started to learn python. Some said that its slow. 

No, you can learn the basics of Python is only a few hours, and become
very proficient at it in days or weeks. It is much faster to learn Python
than to learn C.

> Can somebody pin point the issue.

What is slow? Slow compared to what? Would you prefer to spend three days
writing a program that will run in twenty milliseconds, or three hours
writing the same program which runs in eighty milliseconds? Is the
computer's execution time more important than your development time? If
the computer's time is more valuable than your time, then you should be
writing in assembly language.

Python helps you write shorter code with fewer bugs, much quicker, than C.
If you discover a specific problem that runs too slow in Python, it is
possible to write a C extension to solve that specific problem, while
still having all the other advantages of Python.


-- 
Steven.



From nyamatongwe+thunder at gmail.com  Mon Feb  6 05:46:08 2006
From: nyamatongwe+thunder at gmail.com (Neil Hodgson)
Date: Mon, 06 Feb 2006 10:46:08 GMT
Subject: Thread imbalance
In-Reply-To: <ds68rt$iad$1@bagan.srce.hr>
References: <1138912272.382474.13170@g44g2000cwa.googlegroups.com>	<ds3d35$mo6$2@bagan.srce.hr>
	<mailman.1427.1139097680.27775.python-list@python.org>
	<ds55tb$n00$1@bagan.srce.hr>
	<5mvFf.242125$V7.59456@news-server.bigpond.net.au>
	<ds68rt$iad$1@bagan.srce.hr>
Message-ID: <QNFFf.244029$V7.232067@news-server.bigpond.net.au>

Ivan Voras:

> I mentioned it because, as far as I know the Lua's intepreter doesn't do 
> implicit locking on its own, and if I want to run several threads of 
> pure Lua code, it's possible if I take care of data sharing and 
> synchronization myself.

    Lua's interpreter will perform synchronization if you create 
multiple threads that attach to a shared Lua state. You have to provide 
some functions for Lua to call to perform the locking.

    If you create multiple Lua states they are completely separate 
worlds and do not need to be synchronized.

    Neil


From webraviteja at gmail.com  Sun Feb 12 15:00:06 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 12 Feb 2006 12:00:06 -0800
Subject: Single-file executables
In-Reply-To: <KnDHf.173567$65.4790550@twister1.libero.it>
References: <daadb$43ee6b05$4275d90a$28181@FUSE.NET>
	<1139702872.177824.323010@g47g2000cwa.googlegroups.com>
	<KnDHf.173567$65.4790550@twister1.libero.it>
Message-ID: <1139774406.419493.306350@f14g2000cwb.googlegroups.com>

As Peter later pointed out, that is a licencing issue rather than a
tool issue. After browsing through the PyInstaller documentation, I
came across a curious snippet.

"On Windows, this provides support for doing in-process COM servers. It
is not generalized. However, embedders can follow the same model to
build a special purpose DLL so the Python support in their app is
hidden. You will need to write your own dll, but thanks to Allan Green
for refactoring the C code and making that a managable task."

I am assuming that this means it makes it easy to expose my Python code
as a plain dll. Just what I was looking for. I don't see any more
elaboration on this. Anyone tried this?



From dbasch at yahoo.com  Tue Feb 28 18:08:48 2006
From: dbasch at yahoo.com (Derek Basch)
Date: 28 Feb 2006 15:08:48 -0800
Subject: Rounding up to the nearest exact logarithmic decade
References: <1141165716.023456.318240@u72g2000cwu.googlegroups.com>
	<mailman.2540.1141166520.27775.python-list@python.org>
Message-ID: <1141168128.682146.309800@t39g2000cwt.googlegroups.com>

Thanks effbot. I knew their had to be something buried in the math
module that could help. ceil() it is!

</dTb>



From iddw at hotmail.com  Thu Feb 23 14:43:46 2006
From: iddw at hotmail.com (Dave Hansen)
Date: Thu, 23 Feb 2006 13:43:46 -0600
Subject: A C-like if statement
References: <hp-dnY20cusOnGPeRVn-rg@nmt.edu> <dtl04p$5q2$1@reader2.panix.com>
	<sdadnS6nfNnbmmPeRVn-sw@nmt.edu>
Message-ID: <kr3sv1lvpbrktvhbjchj2b590talk6hk2q@4ax.com>

On Thu, 23 Feb 2006 12:04:38 -0700 in comp.lang.python, "Bob Greschke"
<bob at passcal.nmt.edu> wrote:

>
>"Roy Smith" <roy at panix.com> wrote in message 
>news:dtl04p$5q2$1 at reader2.panix.com...
[...]

>> try:
>>    i = a.find("3")
>>    print "It's here: ", i
>> except NotFound:
>>    print "No 3's here"
>
>Nuts.  I guess you're right.  It wouldn't be proper.  Things are added or 
>proposed every day for Python that I can't even pronounce, but a simple 'if 
>(I = a.find("3")) != -1' isn't allowed.  Huh.  It might be time to go back 
>to BASIC. :)

I think you'll find that BASIC doesn't allow it either...

Of the "missing" "features" of Python, this one is waaaaaay down on my
list.  In fact, it's not there at all.  What I _really_ miss is
do{...}while.  The best workaround I've found is unaesthetic, IMHO:

   while 1:
      # stuff
      if exit_condition: break

Regards,
                                        -=Dave

-- 
Change is inevitable, progress is not.


From norvell at stenocall.com  Wed Feb 22 17:13:58 2006
From: norvell at stenocall.com (Norvell Spearman)
Date: Wed, 22 Feb 2006 16:13:58 -0600
Subject: list assignment
In-Reply-To: <1140641275.840358.292790@o13g2000cwo.googlegroups.com>
References: <11vpi2gdcbccbf6@corp.supernews.com>
	<1140641275.840358.292790@o13g2000cwo.googlegroups.com>
Message-ID: <11vpoh4eutk6106@corp.supernews.com>

Raymond Hettinger wrote:
> It's not different.  They are ways of writing the same thing.

Lutz and Ascher have tuple and list assignment as separate entries in their 
assignment statement forms table so I was expecting there to be some 
difference; thanks for setting me straight.

--
Norvell Spearman


From paddy3118 at netscape.net  Tue Feb 14 03:11:36 2006
From: paddy3118 at netscape.net (Paddy)
Date: 14 Feb 2006 00:11:36 -0800
Subject: how do you pronounce 'tuple'?
In-Reply-To: <dsr69f$epf$1@news.freedom2surf.net>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<1139863824.940773.36310@f14g2000cwb.googlegroups.com>
	<dsr69f$epf$1@news.freedom2surf.net>
Message-ID: <1139904696.784092.224740@o13g2000cwo.googlegroups.com>

Hmm,
I've found a term for a large tuple, a muckle:


http://www.google.co.uk/search?hl=en&q=define%3Amuckle&btnG=Search&meta=

Definitions of muckle on the Web:

    * batch: (often followed by `of') a large number or amount or
extent; "a batch of letters"; "a deal of trouble"; "a lot of money";
"he made a mint on the stock market"; "it must have cost plenty"
      wordnet.princeton.edu/perl/webwn

- Pad



From grahn+nntp at snipabacken.dyndns.org  Sat Feb 25 14:18:58 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 25 Feb 2006 19:18:58 GMT
Subject: Is Python a Zen language?
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
	<9o1Mf.39804$H71.16633@newssvr13.news.prodigy.com>
Message-ID: <slrne01bd2.2t1.grahn+nntp@frailea.sa.invalid>

On Sat, 25 Feb 2006 18:31:33 GMT, Bryan Olson <fakeaddress at nowhere.org> wrote:
...
> I think that's a horrible classification. Every language is both.

I agree; it's horrible as a classification.

But it's interesting concepts. One might use them to discuss the design of
various languages, and how the users treat them -- as long as one doesn't
get carried away.

Too bad Larry Wall doesn't post to this group.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From python-list.overbored at spamgourmet.com  Tue Feb 14 01:03:05 2006
From: python-list.overbored at spamgourmet.com (python-list.overbored at spamgourmet.com)
Date: Tue, 14 Feb 2006 01:03:05 -0500
Subject: Logging hangs thread after detaching a StreamHandler's terminal
In-Reply-To: <8e53a5920602132200t1e0d3e47ge03305e76a95a356@mail.gmail.com>
References: <8e53a5920602132200t1e0d3e47ge03305e76a95a356@mail.gmail.com>
Message-ID: <8e53a5920602132203p4c955d8es20fa202ab074b26a@mail.gmail.com>

Apologies, I seem to have sent this to the wrong list. (Though now
that it's out here...any answers would be most welcome. :)

On 2/14/06, I wrote:
> Hi all,
>
> After many hours, I think I've found a bug in the logging module!
>
> If you add a (stdout) StreamHandler to a logger, then detach the
> terminal for that stdout, subsequent calls to log() will hang the
> calling thread.
>
> To reproduce this, write the following scripts (this was a small test
> case I came up with - maybe there's something simpler):
>
> $ cat tryhup.bash
> #!/usr/bin/env bash
> scp hup.* localhost:
> ssh localhost './hup.bash ; while true ; do sleep 1 ; done'
>
> $ cat hup.bash
> #!/usr/bin/env bash
> ./hup.py &
>
> $ cat hup.py
> #!/usr/bin/env python
> import time
> import logging
> f = file( '/tmp/hup.out', 'w' )
> try:
>        logging.basicConfig( filename = '/tmp/lup.out', filemode = 'w' )
>        # XXX PROBLEM LINE BELOW
>        logging.getLogger('').addHandler( logging.StreamHandler() )
>        while True:
>                f.write( '-------\n' )
>                f.flush()
>                logging.critical( '======' )
>                time.sleep(1)
> finally:
>        f.close()
>
> Run ./tryhup.bash. It will sit in an idle spin. Monitor the files
> /tmp/hup.out and /tmp/lup.out. Hit Ctrl-C on tryhup to kill it. The
> python process is still running, but is stalled (the .out files are no
> longer changing).
>
> If you remove the above labeled line, however, this doesn't happen.
>
> Can anybody please acknowledge this bug? Any temporary workarounds to
> this problem? Thanks in advance for looking into this and for hearing
> me in!
>



From larry.bates at websafe.com  Tue Feb 28 15:54:26 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 28 Feb 2006 14:54:26 -0600
Subject: minimize a program into an icon on the taskbar.
In-Reply-To: <mailman.2520.1141148694.27775.python-list@python.org>
References: <47a726d60602270326i2df525d3sd4a04b74aa447a16@mail.gmail.com>
	<mailman.2520.1141148694.27775.python-list@python.org>
Message-ID: <4404B882.8070902@websafe.com>

Frank Niessink wrote:
> Rajesh Sathyamoorthy:
>> Hi,
>>
>> I would know how to minimize a program (wxpython app) into an icon on
>> the taskbar on windows (the one at the side near the clock, i can't
>> remember what is it called.)
>>
>> Is it easy to be done? Is there a way to do the same thing on Linux?
> 
> Did you look into wx.TaskBarIcon?
> 
> Cheers, Frank
> 
> 
Its called the system tray and here is a link to some sample code
for Windows I found via Google:

http://www.brunningonline.net/simon/blog/archives/SysTrayIcon.py.html


Here is a link that says it works for KDE:

http://rootprompt.org/article.php3?article=8294

This may help with gnome:

http://www.realistanew.com/2005/04/19/bittorrent-tray-icon/

-Larry Bates




From enterr at gmail.com  Tue Feb 14 17:42:00 2006
From: enterr at gmail.com (Atanas Banov)
Date: 14 Feb 2006 14:42:00 -0800
Subject: Pythonic gui format?
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<43f11990$0$667$626a54ce@news.free.fr>
	<1139923105.939191.200660@z14g2000cwz.googlegroups.com>
	<43f1e919$0$649$636a55ce@news.free.fr>
Message-ID: <1139956920.502840.102560@o13g2000cwo.googlegroups.com>

ever considered doing the mapping this way?

window = [
  ["item", {'k1': 'v1', 'k2': 'v2'],
  ["otheritem", {'k1n': 'v1n', 'k2n': 'v2n'}]
]

it is as simple as it gets: for 1:1 mapping from XML, list of
Attributes becomes py List.
the list of Properties of an attribute becomes a py Dictionary

ps. you can do tuples instead of lists if immutable is ok.



From nogradi at gmail.com  Wed Feb  1 18:11:32 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Thu, 2 Feb 2006 00:11:32 +0100
Subject: OO conventions
In-Reply-To: <pan.2006.02.01.23.03.37.881298@zetafunc.net>
References: <mailman.1334.1138833641.27775.python-list@python.org>
	<pan.2006.02.01.23.03.37.881298@zetafunc.net>
Message-ID: <5f56302b0602011511x152527e4k69c29320e9583a58@mail.gmail.com>

>
> In this case, Image seems to be a python module, with the open function
> defined, PIL's Image is not a class.
>

Thanks for the enlightening remarks, especially this last one, indeed,
it's not a class.


From use4d at mail.com  Tue Feb  7 08:10:33 2006
From: use4d at mail.com (use4d at mail.com)
Date: 7 Feb 2006 05:10:33 -0800
Subject: Uses of The 4th Dimension (New Discovery by The Human Race!)
Message-ID: <1139317832.965864.129160@g43g2000cwa.googlegroups.com>



Uses of The 4th Dimension (New Discovery by The Human Race!)



---------------------------------------------------------------------------------


Note Before: Everything you read on this page is The Truth.
What does this mean?
It means, if you try to do what is written here:
EXAMPLE: "If you just make a wish",
it will be granted in The 4th Dimension
for you to enjoy there.
You have nothing to lose.



---------------------------------------------------------------------------------


Since I discovered The 4th Dimension, one of the conclusions
I have reached is, The 4th Dimension is an infinite access to The
Truth.
Throughout this website, I use the term "I wish" - it is really a way
to voice a person's desire - and from the work I have done - it really
works.

>From the saying: "Ask and you shall receive", I have understood that
any
human being can make an infinity of "wishes" and receive The Truth
(the correct answer) to every question they may have, in the form of a
dream
- that same night.


META-PHYSICISTS CALL THIS TECHNIQUE: "PROGRAMMING YOUR SLEEP".

--
With this method, the saying becomes:
"Ask (FOR THE TRUTH) and you shall receive
(THE TRUTH IN THE FORM OF A DREAM THAT NIGHT)!

What does this mean?
It means you can receive THE TRUTH to any question you have in
your heart - answered FREE while you sleep, you
"wake up in the morning wiser" because you have
understood The Truth you asked for!

It's like getting 100% to every quiz or test in school,
because a teacher really requires THE CORRECT ANSWER
or "The Truth" to the questions on the quiz/test!

What is 1+1? The Truth:"2".


---------------------------------------------------------------------------------

>From my research, I have also seen that other people have also known
about this dimension and have "kept silent" about it.

They have been conducting activities that I will term "criminal", this
is why I have included a tract for Law Enforcement, so that they
can become aware that this dimension exists and they can use it as a
tool
to acquire The Truth to solve any and all crimes.


---------------------------------------------------------------------------------

Use The 4th Dimension to find your soulmate

This is very easy to do - all you need to know is
The Truth of WHO your soulmate is.

To find your soulmate, do the following:



---------------------------------------------------------------------------------

Say this out loud before you go to sleep:
"I WISH TO KNOW THE TRUTH:
WHO IS MY SOULMATE?"



---------------------------------------------------------------------------------

Go to sleep and you will get The Truth
in the form of a dream that night.

Once you find out The Truth, why waste anymore time?
When you wake up, go find "him" or "her" and be happy.



---------------------------------------------------------------------------------

What if your soulmate is in another country or far away?

No Problem....Use The 4th Dimension to make contact..
that is, use it "like a telephone" or "a chat room".

Here's how...

Once you find out WHO your soulmate is, contact
his/her mind via The 4th Dimension in this way:



---------------------------------------------------------------------------------

Say this out loud before you go to sleep:
"I WISH TO MEET MY SOULMATE."



---------------------------------------------------------------------------------

Go to sleep and you will meet THE MIND of your
soulmate THAT NIGHT in the form of a dream.

What does this mean?

It means you are ACTUALLY SPEAKING MIND - TO - MIND
with your soulmate, so when you wake up in the morning
(that is, your minds re-enter your physical bodies)
you remember your meeting - it really took place!

Keep meeting in this way until you can meet in the physical world.



---------------------------------------------------------------------------------

Use The 4th Dimension to NEVER BE LIED TO AGAIN

This is one of the best benefits of using The 4th Dimension.

You can use it to stop a lie, before it takes root in your mind.

If a lie takes root in a person's mind,
that person is manipulated by that lie and the liar.

Lies also wastes a person's time and energy.

To stop ALL LIES before they take root, do the following:

Say this out loud before you go to sleep:

"I WISH TO KNOW THE TRUTH:
IS [ INSERT NAME OF PERSON HERE ] LYING TO ME?"

Go to sleep and you will receive The Truth about your question that
night.

This tool is invaluable, because it helps you understand the motive
of anything presented to you in the physical world (3rd Dimension).



---------------------------------------------------------------------------------

Use The 4th Dimension as a "University" [ get an education ]

You can know and learn anything and everything (no matter how old
you are ), your heart desires - FREE - the important thing is
- is that you are learning The Truth abouut any matter
or subject.

You can learn and understand: Physics,
Mathematics, Science, Engineering,
Botany, Medicine, etc

All you have to do is "request The Truth" about a subject -
that is, "make a wish" and you will receive an education on
that subject matter - that night.

To learn any subject matter, you desire to know, say this
out loud before you go to sleep: to sleep:



---------------------------------------------------------------------------------

"I WISH TO KNOW THE TRUTH:
about [ INSERT SUBJECT HERE ]"



---------------------------------------------------------------------------------

Go to sleep and you will get a lesson, on that subject, that night.



---------------------------------------------------------------------------------

EXAMPLE:

Use this tool to study History.

What better way to study History, than to experience History.

Pick any piece of History and make a wish:

Like so:

"I WISH TO KNOW THE TRUTH
ABOUT THE AMERICAN REVOLUTION."

Go to sleep and you will get a lesson on that point in time.

NOTE: When you study History, you are more like a "witness" of History.

You do not (CANNOT) change the past to affect the present.



---------------------------------------------------------------------------------

Use The 4th Dimension to try ( new types of ) food

One of the miracles of The 4th Dimension when it comes to food is:
The food actually tastes better than in the physical world (3rd
Dimension)
and you do not gain any (physical) weight.

Use this dimension to eat your favorite foods ("FAT FREE")
or try new and exotic dishes.

To have a "fancy meal" in the 4th Dimension,
say this out loud before you go to sleep:

"I WISH TO EAT:
[ INSERT FOOD YOU WOULD LIKE TO EAT HERE ]"

Go to sleep and your meal will be served up
in a dream sequence.



---------------------------------------------------------------------------------

Use The 4th Dimension to visit places thought of as "Fiction"

With The 4th Dimension as a tool, places you read in books, actually
have
"a mental state of existence" - that is, they exist and the environment

can be experienced.

Visit the school of "Hogwarts" or the wonderful land of
"Narnia" or even "Middle-Earth".

To visit places you thought "only existed in books or movies"
say this out loud before you go to sleep:

"I WISH TO GO TO [ ENTER 'FANTASY LOCATION' YOU WANT TO VISIT ]"

Go to sleep and you will be "whisked" to that land to experience (just
respect the locals).

EXAMPLE:

To go to the school of "Hogwarts" do the following:

Say this out loud before you go to sleep:

"I WISH TO GO TO HOGWARTS"

Go to sleep and you will visit that school of magic and fantasy.



---------------------------------------------------------------------------------

Use The 4th Dimension to learn The Martial Arts

True fighting is done in 4D space.

Use The 4th Dimension to learn a discipline of The Martial Arts.

To start your training, do the following:

Say this out loud before you go to sleep:

"I WISH TO LEARN THE TRUTH:
ABOUT [INSERT DISCIPLINE HERE ]"

Go to sleep and you will receive a lesson on the art you chose.

EXAMPLES OF MARTIAL ART DISCIPLINES YOU MAY CHOOSE TO REQUEST:
You can learn more than one discipline.


Tai Chi
Kung Fu
 Brazilian Jiu Jitsu
Kenpo
 Kick Boxing
Karate

Tae Kwon Do
Krav Maga
 Jeet Kune Do
Judo
 Ninjitsu
Savate






---------------------------------------------------------------------------------

Use The 4th Dimension to practice/train in a Martial Arts DOJO

Just like in the movie "The Matrix", you too can train like Morpheus &
Neo.

To train / practice, please do the following:
Say this out loud before you go to sleep:

"I WISH TO TRAIN IN A DOJO"

Go to sleep an you will appear in a Dojo,
same "rules" as in "The Matrix"

Understand, you do not need to know any martial
arts skills to request a dojo, you can also use a
DOJO as a "mini-gym".



---------------------------------------------------------------------------------

Use The 4th Dimension to travel the world

Have you ever wanted to go to London, Rome,
Amsterdam, Prague, or any city in the world - but never been?
Why wait? You can go there TONIGHT - FREE - via The 4th Dimension.

Just program your sleep and you will experience these
fantastic cities (or any place on earth you desire to visit),
just like a real vacation in the physical world.

To visit any city in the world,
Say this out loud, before you go to sleep:
"I WISH TO GO TO [ INSERT NAME OF CITY HERE ]"

Go to sleep and you will experience (visit) that city.

Example:

To go to London, just say this before you sleep:
"I WISH TO GO TO LONDON."

Go to sleep and you will experience the city of London.



---------------------------------------------------------------------------------

Use The 4th Dimension to travel the solar system

This universe is big and civilized.
Use The 4th Dimension to visit any planet you choose.

Please follow this link to get started (Space Travel 101)



---------------------------------------------------------------------------------

As you can understand, the most precious time of the
day is really whenever you fall asleep.

That is, you have the opportunity to access The Truth
to know or do anything your heart desires. You just have to
program your sleep and pay attention to your dream time.

Your mind then retains the memory of your research of
The Truth or your adventures in The 4th Dimension.




---------------------------------------------------------------------------------

Try to make at least 1 wish per night.

(*wink*)



---------------------------------------------------------------------------------

If you make a wish and change your mind, just make another one.

It is the last wish you make, before you sleep,
that you pay attention to.

- Sweet Dreams



---------------------------------------------------------------------------------

In Other Words....

One glitch (*wink* - *wink*) I have really discovered that will be of
great interest to all is this:

Anything that costs you money to use in The 3rd Dimension (physical
reality)
you can experience using FREE in The 4th Dimension!

What does this mean?

Ever wanted to drive a Lamborghini? - JUST MAKE A WISH - you (your
mind)
will experience driving a Lamborghini in The 4th Dimension - that
night.



---------------------------------------------------------------------------------

Ever wanted to "get away from it all" and go on a vacation to exotic
locations like: Gstaad, Kenya, or Japan? -
Just "make a wish" and watch your dreams that night.



---------------------------------------------------------------------------------

Save money on college - "request a course" and watch your dreams!



---------------------------------------------------------------------------------

Have fun...

The Author of "Ueber Alles"



---------------------------------------------------------------------------------
A Public Service Message from The Author of "Ueber Alles"

http://www.ueberalles.com/apublicservicemessage.html



From Dennis.Benzinger at gmx.net  Sun Feb  5 15:58:07 2006
From: Dennis.Benzinger at gmx.net (Dennis Benzinger)
Date: Sun, 05 Feb 2006 21:58:07 +0100
Subject: Most prominent Tkinter applications?
In-Reply-To: <a24fa$43e64a39$4275d90a$26634@FUSE.NET>
References: <a24fa$43e64a39$4275d90a$26634@FUSE.NET>
Message-ID: <43e666e0$2@news.uni-ulm.de>

Kevin Walzer schrieb:
> I'm looking for examples of "best practices" in Tkinter/Python
> programming. What are the most prominent Python applications out there
> that use Tkinter as the GUI toolkit? These can be commercial or
> open-source, but are preferably multi-platform.
> 
> I know IDLE is written in Tkinter, so that's one example. Can anyone
> direct me to others?
> 

Leo <http://webpages.charter.net/edreamleo/front.html>, an outlining 
editor, uses Tkinter.

It's at least as prominent as IDLE ;-)


Bye,
Dennis


From grante at visi.com  Wed Feb 22 12:40:26 2006
From: grante at visi.com (Grant Edwards)
Date: Wed, 22 Feb 2006 17:40:26 -0000
Subject: Pyserial never read
References: <1140105936.408387.88130@z14g2000cwz.googlegroups.com>
	<1140219414.143448.234450@z14g2000cwz.googlegroups.com>
	<1140302110.028540.176210@g43g2000cwa.googlegroups.com>
	<slrndvm0sr.6k1.nick@irishsea.home.craig-wood.com>
	<mailman.2241.1140536285.27775.python-list@python.org>
	<slrndvn1ad.he1.nick@irishsea.home.craig-wood.com>
	<1140599901.082142.262540@f14g2000cwb.googlegroups.com>
	<1140629809.822833.33230@o13g2000cwo.googlegroups.com>
Message-ID: <11vp8gaja4tonf4@corp.supernews.com>

On 2006-02-22, sam <samschul at pacbell.net> wrote:
> luca72 wrote:
>> Thanks to all for the help,
>>
>> here you find the code, pls note if i use handshaking = 1 the
>> application don't start.
>> in the delphi configuratio of com port if i use or not handshaking the
>> application work.
>> Best Regards at all
>>
>> Luca
>>
>> import serial
>>         import win32file
>>         port = 2
>
> Is port = 2 correct?

Read the fine documentation at http://pyserial.sourceforge.net/:

     Parameters for the Serial class
     
     ser = serial.Serial(
         port=None,              #number of device, numbering starts at
                                 #zero. if everything fails, the user
                                 #can specify a device string, note
                                 #that this isn't portable anymore
                                 #if no port is specified an unconfigured
                                 #an closed serial port object is created
         baudrate=9600,          #baudrate
         bytesize=EIGHTBITS,     #number of databits
         parity=PARITY_NONE,     #enable parity checking
         stopbits=STOPBITS_ONE,  #number of stopbits
         timeout=None,           #set a timeout value, None for waiting forever
         xonxoff=0,              #enable software flow control
         rtscts=0,               #enable RTS/CTS flow control
     )
     
> I thought that com ports under windows are designated as a string
> "com1","com2",..etc.

You can use those as well, but they're non-portable.  
serial.Serial(port=0) will open the first serial port on either
windows or linux.

-- 
Grant Edwards                   grante             Yow!  Ha ha  Ha ha Ha ha
                                  at               Ha Ha Ha Ha -- When will I
                               visi.com            EVER stop HAVING FUN?!!


From larry.bates at websafe.com  Sat Feb 25 17:02:26 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Sat, 25 Feb 2006 16:02:26 -0600
Subject: spaces at ends of filenames or directory names on Win32
In-Reply-To: <pan.2006.02.24.09.51.53.454797@REMOVETHIScyber.com.au>
References: <dtkuav$keb$1@solaris.cc.vt.edu> <43FE1B5E.8060009@websafe.com>
	<pan.2006.02.23.22.22.17.122779@REMOVETHIScyber.com.au>
	<U5adnSstztOb12PenZ2dnUVZ_sOdnZ2d@comcast.com>
	<pan.2006.02.24.09.51.53.454797@REMOVETHIScyber.com.au>
Message-ID: <lZmdnTqQr_JzTp3ZnZ2dnUVZ_v2dnZ2d@comcast.com>

Steven D'Aprano wrote:
> On Thu, 23 Feb 2006 17:49:31 -0600, Larry Bates wrote:
> 
>> Steven D'Aprano wrote:
>>> On Thu, 23 Feb 2006 14:30:22 -0600, Larry Bates wrote:
>>>
>>>> How about not naming files with leading and trailing spaces on
>>>> the Mac?  Seems like a bad habit that needs breaking ;-).
>>> Why is it a bad habit? Because *Windows* is primitive enough that it can't
>>> cope with leading and trailing spaces? I don't see why Windows' lack is
>>> Mac users' problem.
>>>
>>>
>> It is a problem because the poster says it is a problem for him.
> 
> Absolutely.
> 
> Now read my statement again. Why is it a problem for the Mac _users_?
> 
> I use Linux, Windows and Mac, in varying amounts. I'm fully aware of the
> problems of transferring files from one platform to another. When it
> affects _me_, I may choose to dumb down to the lowest common denominator
> so as to save _me_ problems. But wearing my user hat, if a developer came
> to me telling me I had to avoid using features on my platform of choice in
> order to make his life easier, I'd say to him "So why exactly are we
> paying you the big bucks? That's your problem, you solve it."
> 
> 
> 
I understand you completely, but its a problem for the Mac users because
their company needs to do something with their files that is making it
hard.  I see no difference than if some user chose to use some obscure
spreadsheet or wordprocessing program that works extremely well for them
but is completely incompatible with all other users in the organization.
Why is it their problem?  Because it makes it difficult for others to
work with their data.  I don't believe for a minute you would tell them
"It is ok to keep using your wordprocessing software, if we can't read
the files that's our problem, we will write something to convert them
to a more usable format.  It will only take about 500/1000/2000 hours
to fix for you Mr. _user_."

Funny how we got here.  I just made a suggestion as to how the user can
make the problem go away altogether and my suggestion that it was a bad
habit did have a smiley ;-) as you will note.

-Larry Bates




From petite.abeille at gmail.com  Sun Feb 12 12:41:30 2006
From: petite.abeille at gmail.com (PA)
Date: Sun, 12 Feb 2006 18:41:30 +0100
Subject: Is python very slow compared to C
In-Reply-To: <pan.2006.02.12.17.18.50.356928@REMOVETHIScyber.com.au>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
	<1139754010.067582.214830@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>
	<mailman.1785.1139762698.27775.python-list@python.org>
	<pan.2006.02.12.17.18.50.356928@REMOVETHIScyber.com.au>
Message-ID: <064960548437a321a42bc751c24bd94e@gmail.com>


On Feb 12, 2006, at 18:18, Steven D'Aprano wrote:

> Did you actually bother to read the page you linked to?

I did 8^)

"Lua ? Story of O"
http://alt.textdrive.com/lua/19/lua-story-of-o

Cheers

--
PA, Onnay Equitursay
http://alt.textdrive.com/



From gaz082 at gmail.com  Wed Feb 22 09:47:25 2006
From: gaz082 at gmail.com (Gaz)
Date: 22 Feb 2006 06:47:25 -0800
Subject: No
In-Reply-To: <mailman.2265.1140551970.27775.python-list@python.org>
References: <1140534490.873612.64280@g47g2000cwa.googlegroups.com>
	<1140539240.807314.283280@g43g2000cwa.googlegroups.com>
	<dtfhv7$css$1@sea.gmane.org>
	<mailman.2265.1140551970.27775.python-list@python.org>
Message-ID: <1140619645.303344.317890@g14g2000cwa.googlegroups.com>

@ Steven: LOL =P

@ Frederik: aye, i uploaded the script by FTP, but the idea of this
little program is to allow a technician on field to upload photos from
their laptops when they get into a hotel, along with some text, anywere
in the world. We need the reports to be daily. Email is not an option,
because due my experience, they always lack of info, with a form, i can
put some conditions for sending the report.

So, they can not upload the photos by FTP because its too "geek" for
them. And i need to have a standarized form to handle the reports,
because otherwise its a organizational mess.

The program should handle the upload thingie in the backstage. I'll
look for a script like this in these forums...



From mackstevenson at hotmail.com  Sun Feb  5 15:21:50 2006
From: mackstevenson at hotmail.com (MackS)
Date: 5 Feb 2006 12:21:50 -0800
Subject: how to kill a python process?
In-Reply-To: <slrnduceiv.2t1.grahn+nntp@frailea.sa.invalid>
References: <1139159404.912421.251960@g43g2000cwa.googlegroups.com>
	<slrnduceiv.2t1.grahn+nntp@frailea.sa.invalid>
Message-ID: <1139170910.513664.169900@o13g2000cwo.googlegroups.com>

Hi Jorgen

You wrote that:

> $ head -1 foo3.py
> #!/usr/bin/python
>  $ ./foo3.py
>
> This is the traditional shebang form used for shell and Perl scripts,
> and it names the process 'foo3.py' so you can killall(1) it nicely.

It doesn't work on my system; I just get yet another process called
python. I just read that on some systems perl allows you to rename the
process by assigning to $0:

http://www.linuxquestions.org/questions/showthread.php?t=401299

Is there a way to do the same in python? My trouble is that this are
small utilities that I start from the command line and later need to
stop; I just find myself unable to do so with stopping all of them...

Cheers

Mack



From mathweijzen at home.nl  Sun Feb 26 14:00:45 2006
From: mathweijzen at home.nl (Math)
Date: Sun, 26 Feb 2006 20:00:45 +0100
Subject: Distutils Error while building 'win32com.client' extension
Message-ID: <000501c63b06$f46d3c80$0202a8c0@uw403axvp2ndff>

Hello python people,

Can you help me out please.
I get the folllowing Error while trying to build a installer with the 
Distutils module:
------------------------------------------------------------------------------------------------------------------------------------------
building 'win32com.client' extension....
'Python was built with version 7.1 of Visual Studio, and extensions need to 
be built with the same version of the compiler, but it isn't installed.'
-------------------------------------------------------------------------------------------------------------------------------------------

I don't konw which library to use so here's my setup.py :

from distutils.core import setup, Extension
setup(name='Marathon Manager',\
      version='0.1.0',\
      author='Math',\
      py_modules=['modMain','modWindows','modDialogs','modDataBase','ADOConstants'],\
      data_files=[('bitmaps', ['gif/schoen.bmp', 'if/run.jpg'])],\
      ext_modules=[Extension('win32com.client', ['pythoncom.lib'])])

Thank you all (Again :-)) 



From NOktiltonSPAM at nyc.rr.com  Tue Feb 14 23:55:33 2006
From: NOktiltonSPAM at nyc.rr.com (Kenny Tilton)
Date: Wed, 15 Feb 2006 04:55:33 GMT
Subject: Xah's Edu Corner: accountability & lying thru the teeth
In-Reply-To: <n5t4v1tme5eaa5jmhfpqusd85ajfpliunh@4ax.com>
References: <1133844932.007824.26780@g43g2000cwa.googlegroups.com>
	<1134780763.066592.45390@g49g2000cwa.googlegroups.com>
	<1135405908.381150.133190@o13g2000cwo.googlegroups.com>
	<1136236586.734775.212440@f14g2000cwb.googlegroups.com>
	<1137784561.589887.58380@o13g2000cwo.googlegroups.com>
	<1139909629.798938.284160@g47g2000cwa.googlegroups.com>
	<45dmspF66tepU1@individual.net>
	<r9uIf.8084$lG2.2039@news-wrt-01.rdc-nyc.rr.com>
	<n5t4v1tme5eaa5jmhfpqusd85ajfpliunh@4ax.com>
Message-ID: <9vyIf.8103$lG2.7704@news-wrt-01.rdc-nyc.rr.com>

Al Balmer wrote:
> On Tue, 14 Feb 2006 23:59:19 GMT, Kenny Tilton
> <NOktiltonSPAM at nyc.rr.com> wrote:
> 
> 
>>Ulrich Hobelmann wrote:
>>
>>>Xah Lee wrote:
>>>
>>>
>>>>here's a site: http://www.longbets.org/bets that takes socially
>>>>important predictions. I might have to enter one or two.
>>>>
>>>>i longed for such a accountable predictions for a long time. Usually,
>>>>some fucking fart will do predictions, but the problem is that it's not
>>>
>>>[...]
>>>
>>>OMG, he's back.
>>>
>>>I predict, Xah will haunt us for years to come.
>>>
>>
>>WTF is wrong with Xah? He posts an occasional article in good faith and 
>>leaves it at that. ignoring the insults that follow.
> 
> 
> Apparently you've never actually read one of his articles.

Have you read his web page? Like I did? Get back to me after you come up 
to speed on Xah.

> 
>>In the end we have one good-faith article and a bunch of personal 
>>attacks from a Usenet chorus of self-appointed finger-shakers creating 
>>more pollution than he ever did.
>>
>>If only some of the people castigating Xah for daring to use Usenet 
>>would post as rarely as he, and show as much restraint.
>>
> 
> Restraint? Now I know you haven't read it.
> 

<g> Note that I was not endorsing the content.

The restraint I was talking about was in ignoring you. If you and 
everyone else ignored his articles there would not be this thread. Which 
  is not being dragged out by Xah.

You all dis Xah, yet he is larger than you: you cannot resist heaping 
abuse on him. If you could, his articles would appear and disappear 
without leaving a trace. Instead we get people with half his wit making 
lame attempts at witty put-downs, embarrassing only themselves.

Xah acknowledges his problem, you clowns do not even know you have one.

kenny


From duncanm255 at hotmail.com  Mon Feb 20 18:15:31 2006
From: duncanm255 at hotmail.com (D)
Date: 20 Feb 2006 15:15:31 -0800
Subject: Tkinter Checkboxes
Message-ID: <1140477331.298891.153330@g14g2000cwa.googlegroups.com>

Ok, I'm sure this is something extremely simple that I'm missing,
but..how do I set a variable in a Tkinter Checkbox?  i.e. I have a
variable "test" - if the checkbox is selected, I want to set test=1,
otherwise 0.  Thanks!



From codecraig at gmail.com  Wed Feb 15 11:31:55 2006
From: codecraig at gmail.com (abcd)
Date: 15 Feb 2006 08:31:55 -0800
Subject: Win32_Process.Create -- not starting process
In-Reply-To: <mailman.1947.1140013582.27775.python-list@python.org>
References: <mailman.1947.1140013582.27775.python-list@python.org>
Message-ID: <1140021115.035512.52760@f14g2000cwb.googlegroups.com>

so far i tried adding

SET > c:\tmp.txt
start ....
SET > c:\tmp2.txt

...and I saw both tmp files created but no python running.  I still
have to try skipping the batch file...i'll let u know.

thanks



From psavo at iki.fi  Sun Feb 26 13:54:49 2006
From: psavo at iki.fi (Pasi Savolainen)
Date: Sun, 26 Feb 2006 20:54:49 +0200
Subject: How to use python regular expression to substitute string value
References: <1140978932.892295.322370@z34g2000cwc.googlegroups.com>
Message-ID: <87lkvy7xxi.fsf@a11a.mannikko1.ton.tut.fi>

Allerdyce.John at gmail.com writes:

> Hi,
> I am new to python. I would like to know how to use python regular
> expression to substitute string value?
> I have an input string like this:
> x:11 y:0 w:760 h:19 area:14440 areaPerCent:0
> totalAreaPerCent:-3.08011e+16 type:3 path:///-/1/1
>
> and I would like to convert it to:
> rect x="11" y="0" width="760" height="14440"
>
> all I care about the input string is x, y, w, h.

I'd say you're better off with 'findall':
- -
import re
line = "x:11 y:0 w:760 h:19 area:14440 areaPerCent:0 totalAreaPerCent:-3.08011e+16 type:3 path:///-/1/1"
pattern = "x:(\d+) y:(\d+) w:(\d+) h:(\d+) area:(\d+)"
x, y, width, height, area = re.findall(pattern, line)[0]
print "rect x=\"%(x)s\" y=\"%(y)s\" width=\"%(width)s\" height=\"%(height)s\" ..." % locals()
- -

x .. area are strings when they come out of findall, so you may want to:
- -
x .. area = map (lambda x: int(x), re.findall (pattern, line)[0]
- -

-- 
   Psi -- <http://www.iki.fi/pasi.savolainen>


From lycka at carmen.se  Thu Feb  9 08:16:09 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 09 Feb 2006 14:16:09 +0100
Subject: Python and the health of the public
In-Reply-To: <mailman.1621.1139429674.27775.python-list@python.org>
References: <43e8c2ae$1@news.bezeqint.net>	<43e8f3eb$0$7988$9b622d9e@news.freenet.de>	<43e99e5e@news.bezeqint.net>	<d5hxlpxs.fsf@python.net>
	<mailman.1621.1139429674.27775.python-list@python.org>
Message-ID: <dsffap$317$1@wake.carmen.se>

Tim Churches wrote:
> The use of Python in a public health surveillance system is described
> here (see references 15 and 26):
> http://www.biomedcentral.com/1471-2458/5/141
> 
> Some more papers describing Python's starring role in some other public
> health projects should appear in the next several months.

Might there be something for www.pythonology.com in the future?


From richie at entrian.com  Mon Feb  6 06:06:51 2006
From: richie at entrian.com (Richie Hindle)
Date: Mon, 06 Feb 2006 11:06:51 +0000
Subject: Python V2.4.2 source code
In-Reply-To: <43e72b68$0$29572$da0feed9@news.zen.co.uk>
References: <43e710de$0$23286$db0fefd9@news.zen.co.uk>
	<mailman.1471.1139217340.27775.python-list@python.org>
	<43e72b68$0$29572$da0feed9@news.zen.co.uk>
Message-ID: <u8beu1prgi1hpjclt2ekbmrrva5crj6f46@4ax.com>


[John]
> That particular file doesn't include the implementation files for the core
> modules.

*Which* particular file?  Give us a URL.  The source tarball at
http://www.python.org/2.4.2/ (full URL
http://www.python.org/ftp/python/2.4.2/Python-2.4.2.tgz) contains the full
source.

-- 
Richie Hindle
richie at entrian.com


From aleaxit at yahoo.com  Sat Feb 11 20:54:06 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sat, 11 Feb 2006 17:54:06 -0800
Subject: appending to a list via properties
References: <1139605443.823899.141260@g47g2000cwa.googlegroups.com>
	<1139670699.632590.148760@g14g2000cwa.googlegroups.com>
	<1hal7v6.1pa7ijfg3np46N%aleaxit@yahoo.com>
	<dslu58$alg$1@apollon.grec.isp.9tel.net>
Message-ID: <1haluis.2e3dwrd38pgeN%aleaxit@yahoo.com>

Xavier Morel <xavier.morel at masklinn.net> wrote:

> Alex Martelli wrote:
> > Carl Banks <invalidemail at aerojockey.com> wrote:
> >    ...
> >>>     class better_list (list):
> >>>         tail = property(None, list.append)
> >> This is an impressive, spiffy little class.
> > 
> > Yes, nice use of property.
> > 
> > Alex
> 
> I don't know, I usually see people considering that properties are 
> "cool" as long as they don't have side effects, as long as they're 
> virtual members.

If a property didn't have any side effects, there would be no reason to
define it as a property. I do fully expect x.y=z to have "side effects"
on z when y is an assignable property.

> The tail property doesn't behave like member data at all, the semantics
> are strange, counter-intuitive (tail would usually be the end of the 
> list, either [-1] or [1:], in this case it's some magic position at the
> end of the list). And it has one hell of a side effect.

The name 'tail' may not be ideal (for people coming from languages where
'head' is the first element and 'tail' is all the others, in
particular). But the side effect doesn't look hellish at all to me.


Alex


From lycka at carmen.se  Sun Feb  5 17:16:18 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Sun, 05 Feb 2006 23:16:18 +0100
Subject: translating PHP to Python
In-Reply-To: <1139167762.095956.180350@g14g2000cwa.googlegroups.com>
References: <1139164228.608430.13120@g44g2000cwa.googlegroups.com>
	<6ErFf.3267$MJ.1302@fed1read07>
	<1139167762.095956.180350@g14g2000cwa.googlegroups.com>
Message-ID: <ds5tfj$a3$1@wake.carmen.se>

Dave wrote:
> Is there a built in way to do this in Python, or do I have to pass
> "parent" when I init Thing?

While I'm sure you could find a "clever" way to do this, passing
in "parent" explicitly is the "proper" way to do it. Once in a
while, you might actually want some other object than the logical
"parent" to do the object creation.

By the way, you might want to google up "Law of Demeter". While
many good Python programmers bend that rule a bit, it's a good
aspect to have in mind when designing classes and programs.

> Sorry if this is confusing. It confuses me, too. I should have been a
> carpenter.

I'm not so sure. Confused carpenters tend to do really stupid things
like sawing off their fingers... Programming is a lot safer! ;^)


From gaz082 at gmail.com  Mon Feb 20 15:27:36 2006
From: gaz082 at gmail.com (Gaz)
Date: 20 Feb 2006 12:27:36 -0800
Subject: Attached images by plain email.
In-Reply-To: <1140047591.131312.242680@g44g2000cwa.googlegroups.com>
References: <1140037314.129890.135970@o13g2000cwo.googlegroups.com>
	<1140043677.756437.315080@g14g2000cwa.googlegroups.com>
	<1140047591.131312.242680@g44g2000cwa.googlegroups.com>
Message-ID: <1140467256.733280.207240@z14g2000cwz.googlegroups.com>

Can you help me a little bit more? Please check this out:


  102 part.addheader('Content-Transfer-Encoding', 'base64')
  103 body = part.startbody('image/jpeg; name=c:\check.jpg')
  104 base64.encode(open('check.jpg', 'rb'), body)
  105
  106
base64 = <module 'base64' from '/usr/lib/python2.3/base64.pyc'>,
base64.encode = <function encode>, builtin open = <type 'file'>, body =
<StringIO.StringIO instance>

IOError: [Errno 2] No such file or directory: 'check.jpg'
      args = (2, 'No such file or directory')
      errno = 2
      filename = 'check.jpg'
      strerror = 'No such file or directory'



From noaddress at ohno.email.com  Sat Feb 25 13:03:50 2006
From: noaddress at ohno.email.com (Twig)
Date: Sat, 25 Feb 2006 19:03:50 +0100
Subject: Is Python a Zen language?
In-Reply-To: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
Message-ID: <dtq2f3$sh8$1@phys-news4.kolumbus.fi>

What is "zen"?

Is it something eatible (I'm hungry now)?


From finite.automaton at gmail.com  Thu Feb  9 11:43:41 2006
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 9 Feb 2006 08:43:41 -0800
Subject: Finding the public callables of self
In-Reply-To: <1139501230.964886.190500@g43g2000cwa.googlegroups.com>
References: <1139501230.964886.190500@g43g2000cwa.googlegroups.com>
Message-ID: <1139503421.181118.127580@o13g2000cwo.googlegroups.com>

import inspect
myCallables = [name for name, value in inspect.getmembers(self) if not
name.startswith('_') and callable(value)]


Instance methods aren't in self.__dict__ because they're a part of the
class.  To made a comprehensive list of all the attributes available to
an instance, you have to traverse the attribute dictionaries of the
instance, its class, and all of the base classes in the right order.
(inspect.getmro returns the base classes in method resolution order)



From steve at holdenweb.com  Mon Feb  6 08:39:17 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 06 Feb 2006 13:39:17 +0000
Subject: Literal Escaped Octets
In-Reply-To: <pan.2006.02.06.04.50.15.325558@hotmail.com>
References: <pan.2006.02.06.04.50.15.325558@hotmail.com>
Message-ID: <ds7ji2$18c$1@sea.gmane.org>

Chason Hayes wrote:
> I am trying to convert raw binary data to data with escaped octets in
> order to store it in a bytea field on postgresql server. I could do this
> easily in c/c++ but I need to do it in python. I am not sure how to read
> and evaluate the binary value of a byte in a long string when it is a non
> printable ascii value in python. I read some ways to use unpack from the
> struct module, but i really couldn't understand where that would help. I
> looked at the MIMIEncode module but I don't know how to convert the object
> to a string. Is there a module that will convert the data? It seems to me
> that this question must have been answered a million times before but I
> can't find anything.
> 
> 
> 
> See http://www.postgresql.org/docs/8.1/interactive/datatype-binary.html
> for a description of the problem domain.
> 
> 
The URL you reference is discussing how you represent arbitrary values 
in string literals. If you already have the data in a Python string the 
best advise is to use a parameterized query - that way your Python DB 
API module will do the escaping for you!

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From aleaxit at yahoo.com  Mon Feb 27 22:35:32 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 27 Feb 2006 19:35:32 -0800
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>
	<4402AB7F.7070804@REMOVEMEcyber.com.au>
	<7xzmkdxkce.fsf@ruckus.brouhaha.com>
	<pan.2006.02.27.11.09.59.508427@REMOVETHIScyber.com.au>
	<mailman.2485.1141069877.27775.python-list@python.org>
Message-ID: <1hbfmni.114mcjug5d2n3N%aleaxit@yahoo.com>

Terry Reedy <tjreedy at udel.edu> wrote:
   ...
> I suspect that the notion of empty  set was once controversial.

Yep: Reverend Dodgson (best known by his pen name of Lewis Carroll, and
as the author of the Alice novels, but a logician and mathematician IRL)
fought long and hard against Cantor's set theory, focusing on "the empty
set" (singular: in Cantor's theory there can be only one) but not
managing to build an actual contradiction around it.  The poor man died
just before his compatriot Bertrand Russell found "Russell's Paradox"
(which destroyed Frege's logic -- but is quite applicable to destroying
a foundation stone of Cantor's set theory as well).

I personally believe that Dodgson was reaching towards what today we
call modal logic (particularly intensional logic), though he could
hardly get there with such encumbrances as his fiction writing, his
photography, his heavy smoking of cannabis, etc, etc. But, that's just
me, and I can't claim to be an expert at modern set theory (though I do
know enough of it to see that it's quite different from Cantor's "naive"
version that's still taught in most schools...!-), much less of the
subtleties of modal logic.  Still, if you give a set interpretation of
modal logic, there isn't ONE empty set: the crucial point of modal
logic, from my semi-learned POV, is that it distinguishes what JUST
HAPPENS to be false, from what MUST INTRINSICALLY be false (and ditto
for true).  In set terms, say, "all integers x such that x>x" would be
an *intrinsically* empty set, while "all dogs that are in this house
right now" would be a set which *just happens* to be empty -- they
aren't "one and the same, the sole empty set" any more than they are in
commonsense (the notion Dodgson fought against).


Alex


From kbk at shore.net  Tue Feb 21 20:09:20 2006
From: kbk at shore.net (Kurt B. Kaiser)
Date: Tue, 21 Feb 2006 20:09:20 -0500 (EST)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200602220109.k1M19K9n008943@bayview.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  385 open (-14) /  3067 closed (+25) /  3452 total (+11)
Bugs    :  864 open (-59) /  5621 closed (+68) /  6485 total ( +9)
RFE     :  211 open ( +2) /   200 closed ( +2) /   411 total ( +4)

New / Reopened Patches
______________________

GNU uses double-dashes not single  (2006-02-16)
       http://python.org/sf/1433148  opened by  splitscreen

restrict codec lookup to encodings package  (2006-02-16)
CLOSED http://python.org/sf/1433198  reopened by  lemburg

restrict codec lookup to encodings package  (2006-02-16)
CLOSED http://python.org/sf/1433198  opened by  Guido van Rossum

add on_missing() and default_factory to dict  (2006-02-17)
       http://python.org/sf/1433928  opened by  Guido van Rossum

CHM file contains proprietary link format  (2006-02-18)
       http://python.org/sf/1434298  opened by  Alexander Schremmer

Patch to support lots of file descriptors  (2006-02-19)
       http://python.org/sf/1434657  opened by  Sven Berkvens-Matthijsse

Add copy() method to zlib's compress and decompress objects  (2006-02-20)
       http://python.org/sf/1435422  opened by  Chris AtLee

PEP 343 with statement  (2006-02-21)
       http://python.org/sf/1435715  opened by  mbland

Incremental codecs  (2006-02-21)
       http://python.org/sf/1436130  opened by  Walter D?rwald

fix inplace assignment for immutable sequences  (2006-02-21)
       http://python.org/sf/1436226  opened by  Georg Brandl

Patches Closed
______________

GNU uses double-dashes not single  (2006-02-16)
       http://python.org/sf/1433166  deleted by  gvanrossum

restrict codec lookup to encodings package  (2006-02-16)
       http://python.org/sf/1433198  closed by  lemburg

restrict codec lookup to encodings package  (2006-02-16)
       http://python.org/sf/1433198  closed by  lemburg

use computed goto's in ceval loop  (2006-01-18)
       http://python.org/sf/1408710  closed by  loewis

have SimpleHTTPServer return last-modified headers  (2006-01-28)
       http://python.org/sf/1417555  closed by  birkenfeld

Feed style codec API  (2005-01-12)
       http://python.org/sf/1101097  closed by  lemburg

chunk.py can't handle >2GB chunks  (2005-12-05)
       http://python.org/sf/1373643  closed by  birkenfeld

Fix of bug 1366000  (2005-11-30)
       http://python.org/sf/1370147  closed by  birkenfeld

Optional second argument for startfile  (2005-12-29)
       http://python.org/sf/1393157  closed by  birkenfeld

Clairify docs on reference stealing  (2006-01-26)
       http://python.org/sf/1415507  closed by  birkenfeld

urllib proxy_bypass broken  (2006-02-07)
       http://python.org/sf/1426648  closed by  birkenfeld

Speed up EnumKey call  (2004-06-22)
       http://python.org/sf/977553  closed by  birkenfeld

[PATCH] Bug #1351707  (2005-11-10)
       http://python.org/sf/1352711  closed by  birkenfeld

fileinput patch for bug #1336582  (2005-10-25)
       http://python.org/sf/1337756  closed by  birkenfeld

Fix for int(string, base) wrong answers  (2005-10-22)
       http://python.org/sf/1334979  closed by  birkenfeld

[PATCH] 100x optimization for ngettext  (2005-11-06)
       http://python.org/sf/1349274  closed by  birkenfeld

commands.getstatusoutput()  (2005-11-02)
       http://python.org/sf/1346211  closed by  birkenfeld

two fileinput enhancements (fileno, openhook)  (2005-06-05)
       http://python.org/sf/1215184  closed by  birkenfeld

mode argument for fileinput class  (2005-05-31)
       http://python.org/sf/1212287  closed by  birkenfeld

do not add directory of sys.argv[0] into sys.path  (2004-05-02)
       http://python.org/sf/946373  closed by  gbrandl

prefix and exec_prefix as root dir bug  (2004-04-08)
       http://python.org/sf/931938  closed by  gbrandl

New / Reopened Bugs
___________________

optparse docs double-dash confusion  (2006-02-16)
       http://python.org/sf/1432838  opened by  John Veness

Logging hangs thread after detaching a StreamHandler's termi  (2006-02-13)
CLOSED http://python.org/sf/1431253  reopened by  yangzhang

os.path.expandvars sometimes doesn't expand $HOSTNAME  (2006-02-17)
CLOSED http://python.org/sf/1433667  opened by  Doug Fort

normalize function in minidom unlinks empty child nodes  (2006-02-17)
       http://python.org/sf/1433694  opened by  RomanKliotzkin

string parameter to ioctl not null terminated, includes fix  (2006-02-17)
       http://python.org/sf/1433877  opened by  Quentin Barnes

pointer aliasing causes core dump, with workaround  (2006-02-17)
       http://python.org/sf/1433886  opened by  Quentin Barnes

Python crash on __init__/__getattr__/__setattr__ interaction  (2004-04-26)
CLOSED http://python.org/sf/942706  reopened by  hhas

Crash when decoding UTF8  (2006-02-20)
CLOSED http://python.org/sf/1435487  opened by  Viktor Ferenczi

CGIHTTPServer doesn't handle path names with embeded space  (2006-02-21)
       http://python.org/sf/1436206  opened by  Richard Coupland

Bugs Closed
___________

Logging hangs thread after detaching a StreamHandler's termi  (2006-02-14)
       http://python.org/sf/1431253  closed by  vsajip

logging module's setLoggerClass not really working  (2005-09-08)
       http://python.org/sf/1284928  closed by  vsajip

pydoc still doesn't handle lambda well  (2006-02-15)
       http://python.org/sf/1432260  closed by  birkenfeld

smtplib: empty mail addresses  (2006-02-12)
       http://python.org/sf/1430298  closed by  birkenfeld

IMPORT PROBLEM: Local submodule shadows global module  (2006-02-01)
       http://python.org/sf/1421513  closed by  birkenfeld

class dictionary shortcircuits __getattr__  (2006-01-31)
       http://python.org/sf/1419989  closed by  birkenfeld

SimpleHTTPServer doesn't return last-modified headers  (2006-01-28)
       http://python.org/sf/1417554  closed by  birkenfeld

os.path.expandvars sometimes doesn't expand $HOSTNAME  (2006-02-17)
       http://python.org/sf/1433667  closed by  birkenfeld

http response dictionary incomplete  (2006-02-01)
       http://python.org/sf/1421696  closed by  birkenfeld

Bug bz2.BZ2File(...).seek(0,2)  (2005-11-25)
       http://python.org/sf/1366000  closed by  birkenfeld

Incorrect Decimal-float behavior for +  (2005-11-13)
       http://python.org/sf/1355842  closed by  arigo

http auth documentation/implementation conflict  (2005-08-13)
       http://python.org/sf/1258485  closed by  birkenfeld

bsddb.__init__ causes error  (2006-01-04)
       http://python.org/sf/1396678  closed by  birkenfeld

StreamReader.readline doesn't advance on decode errors  (2005-12-13)
       http://python.org/sf/1379393  closed by  birkenfeld

zipimport produces incomplete IOError instances  (2005-11-08)
       http://python.org/sf/1351707  closed by  birkenfeld

zipfile: inserting some filenames produces corrupt .zips  (2006-01-24)
       http://python.org/sf/1413790  closed by  birkenfeld

socketmodule.c compile error using SunPro cc  (2003-10-06)
       http://python.org/sf/818490  closed by  birkenfeld

Python-2.3.3c1, Solaris 2.7: socketmodule does not compile  (2003-12-05)
       http://python.org/sf/854823  closed by  birkenfeld

README build instructions for fpectl  (2004-01-07)
       http://python.org/sf/872175  closed by  birkenfeld

test_fcntl fails on netbsd2  (2005-01-12)
       http://python.org/sf/1101233  closed by  birkenfeld

Python 2.4 and 2.3.5 won't build on OpenBSD 3.7  (2005-11-01)
       http://python.org/sf/1345313  closed by  loewis

getwindowsversion() constants in sys module  (2005-10-10)
       http://python.org/sf/1323369  closed by  gbrandl

No documentation for PyFunction_* (C-Api)  (2004-08-22)
       http://python.org/sf/1013800  closed by  gbrandl

pickle files should be opened in binary mode  (2005-01-14)
       http://python.org/sf/1102649  closed by  gbrandl

os.stat returning a time   (2003-09-22)
       http://python.org/sf/810887  closed by  gbrandl

test_sax fails on python 2.2.3 &amp; patch for regrtest.py  (2003-06-21)
       http://python.org/sf/758504  closed by  gbrandl

a exception ocurrs when compiling a Python file  (2003-12-09)
       http://python.org/sf/856841  closed by  gbrandl

Ms VC 2003 not supported  (2003-06-18)
       http://python.org/sf/756842  closed by  gbrandl

site.py breaks if prefix is empty  (2003-04-01)
       http://python.org/sf/713601  closed by  gbrandl

AESend on Jaguar  (2002-08-14)
       http://python.org/sf/595105  closed by  jackjansen

source files using encoding ./. universal newlines  (2003-07-31)
       http://python.org/sf/780730  closed by  lemburg

Solaris 8 declares gethostname().  (2005-08-12)
       http://python.org/sf/1257687  closed by  gbrandl

httplib.HTTPConnection._send_request header parsing bug  (2003-10-27)
       http://python.org/sf/831271  closed by  gbrandl

Problem with ftplib on HP-UX11i  (2003-09-25)
       http://python.org/sf/812376  closed by  gbrandl

locale.getdefaultlocale doesnt handle all locales gracefully  (2003-09-27)
       http://python.org/sf/813449  closed by  gbrandl

NotImplemented return value misinterpreted in new classes  (2003-11-22)
       http://python.org/sf/847024  closed by  gbrandl

fileinput does not use universal input  (2003-12-15)
       http://python.org/sf/860515  closed by  gbrandl

Cursors not correctly closed after exception.  (2005-05-28)
       http://python.org/sf/1210377  closed by  gbrandl

urllib2 doesn't handle username/password in url  (2004-04-29)
       http://python.org/sf/944396  closed by  gbrandl

urllib2.HTTPBasicAuthHandler problem with [HOST]:[PORT]  (2004-11-29)
       http://python.org/sf/1075427  closed by  gbrandl

urllib.urlopen() fails to raise exception  (2004-05-04)
       http://python.org/sf/947571  closed by  gbrandl

__mul__ taken as __rmul__ for mul-by-int only  (2003-10-25)
       http://python.org/sf/830261  closed by  gbrandl

Python crash on __init__/__getattr__/__setattr__ interaction  (2004-04-26)
       http://python.org/sf/942706  closed by  gbrandl

Error "exec"ing python code  (2005-03-21)
       http://python.org/sf/1167300  closed by  gbrandl

type() and isinstance() do not call __getattribute__  (2005-08-19)
       http://python.org/sf/1263635  closed by  gbrandl

Crash when decoding UTF8  (2006-02-20)
       http://python.org/sf/1435487  closed by  nnorwitz

New / Reopened RFE
__________________

Implement preemptive threads in Python  (2006-02-16)
       http://python.org/sf/1432694  reopened by  darkprokoba

Implement preemptive threads in Python  (2006-02-16)
       http://python.org/sf/1432694  opened by  Andrey Petrov

Use new expat version 2.0  (2006-02-17)
       http://python.org/sf/1433435  opened by  Wolfgang Langner

python executable optionally should search script on PATH  (2005-12-13)
       http://python.org/sf/1379573  reopened by  cconrad

Extend pre-allocated integers to cover [0, 255]  (2006-02-21)
       http://python.org/sf/1436243  opened by  Tim Delaney

RFE Closed
__________

Implement preemptive threads in Python  (2006-02-16)
       http://python.org/sf/1432694  closed by  mwh

fileinput/gzip modules should play well  (2002-06-01)
       http://python.org/sf/563141  closed by  birkenfeld



From spe.stani.be at gmail.com  Sun Feb 19 15:50:04 2006
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 19 Feb 2006 12:50:04 -0800
Subject: editor for Python on Linux
In-Reply-To: <dtai6e$23m$2@ariane.blic.net>
References: <dtai6e$23m$2@ariane.blic.net>
Message-ID: <1140382204.850748.23290@z14g2000cwz.googlegroups.com>

SPE: http://pythonide.stani.be

I use it on Ubuntu. For a quick start, view:
http://showmedo.com/videoListPage?listKey=PythonDevelopmentWithSPE

Stani



From albert at compuscan.co.za  Thu Feb  9 01:20:42 2006
From: albert at compuscan.co.za (Albert Leibbrandt)
Date: Thu, 09 Feb 2006 08:20:42 +0200
Subject: cx_Oracle entry point error
In-Reply-To: <1139443241.183372.296780@o13g2000cwo.googlegroups.com>
References: <1139443241.183372.296780@o13g2000cwo.googlegroups.com>
Message-ID: <43EADF3A.7000303@compuscan.co.za>

lblr33 at yahoo.com wrote:

>I downloaded cx_Oracle from
>http://www.cxtools.net/default.aspx?nav=cxorlb and selected the windows
>installer for Oracle 8i, Python 2.4
>
>>From the readme.txt file:
>BINARY INSTALL:
>Place the file cx_Oracle.pyd or cx_Oracle.so anywhere on your Python
>path.
>
>So I tried this and set PYTHONPATH.
>
>I then created a script called ora_conn.py with one line:
>import cx_Oracle
>
>When I run the script (c:\python24\python.exe ora_conn.py) I get this
>error in a pop-up box:
>
>"The procedure entry point OCIEnvCreate could not be located in the
>dynamic link ligrary OCI.dll
>
>The bottom line of what I want to do is to connect to an oracle
>database without having to create an ODBC connection on the individual
>PC.
>
>Any ideas?  Thanks.
>
>  
>
are you running on windows or linux?
On both of these os's I only needed to install the binary. Have a look 
at this page on sourceforge 
http://sourceforge.net/project/showfiles.php?group_id=84168

cheers
albert



From mooquack at suad.org  Wed Feb  1 18:07:01 2006
From: mooquack at suad.org (Kirk McDonald)
Date: Wed, 01 Feb 2006 15:07:01 -0800
Subject: OO conventions
In-Reply-To: <mailman.1334.1138833641.27775.python-list@python.org>
References: <mailman.1334.1138833641.27775.python-list@python.org>
Message-ID: <43e13e1b$1@nntp0.pdx.net>

Daniel Nogradi wrote:
> I'm relatively new to object oriented programming, so get confused
> about its usage once in a while. Suppose there is a class Image that
> has a number of methods, rotate, open, verify, read, close, etc. Then
> to use this class my natural guess would be to have something like
> 
> image = Image( )
> image.read( "myfile.jpg" )
> image.rotate( )
> image.close( )
> 
> But now it turns out that the PIL module uses this as
> 
> image = Image.open( "myfile.jpg" )
> image.verify( )
> image.rotate( )
> image.close( )
> 
> Perhaps the real Image class of PIL doesn't have these methods
> exactly, but doesn't matter, my point is the way it works. Is it
> normal that instead of first creating an instance of a class, it
> starts right away with one its methods? I of course understand that
> the PIL people simply made a choice that their module works this way,
> period, but I'm just wondering if it wouldn't have been more "logical"
> to do it along the way of my first example.
> 
> I guess it's just a matter of convention or how the programmer feels
> like, but there are no conventions of this type? Which would be more
> pythonic? Or I shouldn't worry and it's totally up to the developer?


If I were coding a class like that, I'd probably do it like this:

image = Image("myfile.jpg")
image.rotate()
image.close()

And, in addition, there would be an image.open() method. In the above, 
__init__ just calls it on its own when the filename is specified.

(Though, of course, I'm not at all familiar with the PIL module; there 
might be more stuff going on behind the scenes with the way they do it.)

-Kirk McDonald


From fredrik at pythonware.com  Tue Feb 28 04:12:52 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 28 Feb 2006 10:12:52 +0100
Subject: newbie trying understand sys.path
References: <000801c63b44$cf823630$2f01a8c0@m8d4477f3de884>
Message-ID: <du146m$lnh$1@sea.gmane.org>

"MARK LEEDS" wrote:

> So, as it said in "Beginning Python", I went into my .bashrc file and did
>
> export PYTHONPATH=$PYTHONPATH:~/mytemp
>
> then, i typed pprint.pprint(sys.path) and it worked.
> it was in there !!!!!!!!!!!!!!!!!!!!!!!!
>
> but, now I want to take it out.
>
> i deleted the command from the .bashrc file and resourced it but it was still in there.

removing the PYTHONPATH variable from the bashrc script won't
remove the current value from the current environment.

> So, then I tried ( inside a python program )
>
> sys.path = sys.path[1:]
>
> and it works inside the program so that sys.path changed while the program
> was running.
>  but, then i checked it again, by taking out the above command
> and typing pprint.pprint(sys.path) and it was still there ?
>
> Basically, my question is : Is there a permanent way of taking things out of
> sys.path that you put in sort of by accident or for experimentation ?

you can log out and log in again.

or you can use export to set PYTHONPATH to whatever value you
want it to have.

or you can use "unset PYTHONPATH" to remove it from the environment:

    $ echo $PYTHONPATH

    $ export PYTHONPATH=spam
    $ echo $PYTHONPATH
    spam
    $ python -c "import sys; print sys.path[:2]"
    ['', '/home/fredrik/spam']
    $ unset PYTHONPATH
    $ echo $PYTHONPATH

    $ python -c "import sys; print sys.path[:2]"
    ['', '/usr/local/lib/python2.5']

</F>





From samrobertsmith at gmail.com  Sat Feb 11 03:41:38 2006
From: samrobertsmith at gmail.com (linda.s)
Date: Sat, 11 Feb 2006 00:41:38 -0800
Subject: Scientific Computing with NumPy
In-Reply-To: <qnkslqq8ztf.fsf@arbutus.physics.mcmaster.ca>
References: <ds7bvh$ab1$2@gemini.csx.cam.ac.uk>
	<mailman.1482.1139225595.27775.python-list@python.org>
	<ds7ch4$bj7$1@gemini.csx.cam.ac.uk>
	<mailman.1704.1139573734.27775.python-list@python.org>
	<qnkslqq8ztf.fsf@arbutus.physics.mcmaster.ca>
Message-ID: <1d987df30602110041h711346b9lafe70824359104c@mail.gmail.com>

On 2/10/06, David M. Cooke <cookedm+news at physics.mcmaster.ca> wrote:
> "linda.s" <samrobertsmith at gmail.com> writes:
>
> > where to download numpy for Python 2.3 in Mac?
> > Thanks!
> > Linda
>
> I don't know if anybody's specifically compiled for 2.3; I think most
> of the developers on mac are using 2.4 :-)
>
> But (assuming you have the developer tools installed) it's really to
> compile: python setup.py build && python setup.py install.
>
> Do you need Tiger (10.4) or Panther (10.3) compatibility?
>
> --
> |>|\/|<
> /--------------------------------------------------------------------------\
> |David M. Cooke
The confusing thing is python 2.3 comes with mac when you got the
machine. so we need numpy which is OK with python 2.3. is my
understanding right?
Linda


From tim.golden at viacom-outdoor.co.uk  Thu Feb 23 03:48:48 2006
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Thu, 23 Feb 2006 08:48:48 -0000
Subject: event/job scheduling
Message-ID: <9A28C052FF32734DACB0A288A3533991044D25A1@vogbs009.gb.vo.local>

| i'd like to do the following kind of event/job scheduling:
| run some task(s) (python code) everyday at (say) 8am for (say) a week.
| 
| i need to do this for both windows xp and suse linux 
| machines. although i know
| that i can use cron or its equivalent in windows to kick off 
| the python interpreter,
| i was kinda hoping python has a builtin mechanism i can use 
| for both OSes.
| 
| can python's scheduler class do the job? if so, can someone 
| share some code
| snippets (it's not clear to me from reading the docs if 
| python's scheduler class
| can do the job).
| 
| if python's scheduler class cannot do the job, can someone 
| recommend a third-party software/library that can do the job? 
|  thanks for any help!

This was a Google-guess:

http://www.kalab.com/freeware/pycron/pycron.htm

I seem to remember that Irmen de Jong (of
Pyro fame) had something similar, Kronos? 
but I can't seem to find it now.

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
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From sanjay.k.arora at gmail.com  Tue Feb 14 14:47:23 2006
From: sanjay.k.arora at gmail.com (Sanjay Arora)
Date: Wed, 15 Feb 2006 01:17:23 +0530
Subject: How can I find a freelance programmer?
In-Reply-To: <873biliy5l.fsf@ieee.org>
References: <op.s4y9v9olix6gqv@charles> <873biliy5l.fsf@ieee.org>
Message-ID: <7e41ba8f0602141147k7c192093m229ce585480816a9@mail.gmail.com>

Try this site <http://www.getafreelancer.com/affiliates/tci/>

I use them. You will make many freelancer contacts...some good some
bad...don't pay without escrow but good jobs get done.

Hope you will find it worthwhile.

Best regards & good luck.
Sanjay.


On 2/15/06, Jorge Godoy <godoy at ieee.org> wrote:
>
> Charles <me at privacy.net> writes:
>
> > I am looking for a freelance Python programmer to create a
> cross-platform
> > application with wxPython.
> > Any idea where I could find one?
>
> Here?  At Python-jobs?  :-)  At the wxPython mailing list?
>
> --
> Jorge Godoy      <godoy at ieee.org>
>
> "Quidquid latine dictum sit, altum sonatur."
> - Qualquer coisa dita em latim soa profundo.
> - Anything said in Latin sounds smart.
> --
> http://mail.python.org/mailman/listinfo/python-list
>
-------------- next part --------------
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From godoy at ieee.org  Mon Feb 27 12:45:05 2006
From: godoy at ieee.org (Jorge Godoy)
Date: Mon, 27 Feb 2006 14:45:05 -0300
Subject: making 'utf-8' default codec
References: <MPG.1e6d0bea15971bcb989832@news.htnet.hr>
	<dtusr3$o1s$1@nemesis.news.tpi.pl>
Message-ID: <87irr0ae72.fsf@ieee.org>

Jarek Zgoda <jzgoda at o2.usun.pl> writes:

> Bad idea. You may accidentally break some libraries that depend on ASCII
> being default & standard.

And what would those produce as output when fed with unicode data?  How would
they handle this input?  IMVHO nothing should rely on having a standard
charset as input.  If it is required, then the library should set it up by
itself: explicit is better than implicit.

-- 
Jorge Godoy      <godoy at ieee.org>

"Quidquid latine dictum sit, altum sonatur."
- Qualquer coisa dita em latim soa profundo.
- Anything said in Latin sounds smart.


From nospamformeSVP at gmail.com  Wed Feb 22 15:59:13 2006
From: nospamformeSVP at gmail.com (Don Taylor)
Date: Wed, 22 Feb 2006 15:59:13 -0500
Subject: Newbie question: Multiple installations of Python on Windows
	machines
In-Reply-To: <1140519304.913540.296600@g14g2000cwa.googlegroups.com>
References: <mailman.2185.1140472875.27775.python-list@python.org>
	<1140519304.913540.296600@g14g2000cwa.googlegroups.com>
Message-ID: <dtijb6$t61$1@sea.gmane.org>

Fuzzyman wrote:

> A lot of 'exe' installers are special types of zip archvies. You might
> be able to open it using winzip or winrar and do a manual install.

Interesting suggestion that would never have occured to me.  One of the 
unzippers I tried (IZArc) did show me a directory of the contents, but 
it would still not let me extract the files.

> Another alternative is to use the free VMWare player to create a fresh
> windows install that will run in a window. You can then install Python
> 2.3 and your application and extract the files you need to see if you
> can make it work under Python 2.4.

So I tried this and copied the files from my virtual machine to the 
site-packages folder on my real Python 2.4 machine, I then ran into 
there being a compiled extension.
> 
> If the application contains compiled extensions then they won't be
> portable from Python 2.3 to Python 2.4 - however the application will
> almost certainly run with Movable Python 2.3 (which won't interfere at
> all with your Python 2.4 install).
> 
>    http://www.voidspace.org.uk/python/movpy/

I could use a virtual machine with 2.3 installed, but neither option 
appeals to me right now as I want to use the rest of my Python installed 
  stuff (and Eclipse Pydev) stuff - which is why I wanted to continue 
with Python 2.4 in the first place.

I have got a copy of the C source for the extension, can anybody give 
me/point me a cookbook recipe for making my own version of the extension 
that will play with 2.4?  This is for Windows XP and I don't currently 
have a C compiler installed.

> Fuzzyman

Some great suggestions.

Thanks,

Don.



From onurb at xiludom.gro  Fri Feb  3 10:41:33 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Fri, 03 Feb 2006 16:41:33 +0100
Subject: Regular expression query
In-Reply-To: <1138976443.473320.315170@g44g2000cwa.googlegroups.com>
References: <1138976443.473320.315170@g44g2000cwa.googlegroups.com>
Message-ID: <43e379c3$0$23540$636a55ce@news.free.fr>

Martin Biddiscombe wrote:
> It's probably quite simple, but what I want is a regular expression

If it's simple, then you probably *dont* want a regexp.

> to
> parse strings of the form:
> 
> "parameter=12ab"
> "parameter=12ab foo bar"
> "parameter='12ab'"
> "parameter='12ab' biz boz"
> "parameter="12ab""
> "parameter="12ab" junk"
> 
> in each case returning 12ab as a match. "parameter" is known and fixed.
> The parameter value may or may not be enclosed in single or double
> quotes, and may or may not be the last thing on the line. If the value
> is quoted, it may contain spaces.
> 
> I've tried a regex of the form:
> re.compile(r'parameter=(["\']?(.*?)\1( *|$)')
> 
> This works fine when the parameter's value is quoted, but if the quotes
> are missing, it falls over since the \1 is empty and so the non-greedy
> "match anything" ends up matching nothing.
> 
> Any suggestions?

yes : forget regexps, use str methods.

parse = lambda l: \ l.split('=',1)[1].split()[0].strip().strip("'\"")

NB : I tried my best to make it as obfuscated as a regexp so you still
gain extra bonus points from Perl-addicts !-p - but feel free to rewrite
this cleanly.


> Thanks

HTH
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From claudio.grondi at freenet.de  Tue Feb 21 19:35:44 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Wed, 22 Feb 2006 01:35:44 +0100
Subject: Basic coin flipper program - logical error help
In-Reply-To: <1140567243.251982.255620@g14g2000cwa.googlegroups.com>
References: <1140567243.251982.255620@g14g2000cwa.googlegroups.com>
Message-ID: <dtgbl6$mr$1@newsreader3.netcologne.de>

DannyB wrote:
> I'm just learning Python.  I've created a simple coin flipper program -
> here is the code:
> 
> [source]
> #Coin flipper
> import random
> 
> heads = 0
> tails = 0
> counter = 0
> 
> while (counter < 100):

      coin = random.randrange(2)

Claudio

>     if (coin == 0):
>         heads += 1
>         counter += 1
>     else:
>         tails += 1
>         counter += 1
> 
> coin = random.randrange(2)
> 
> 
> print "\nThe coin landed on heads", heads, "times."
> print "\nThe coin landed on tails", tails, "times."
> [/source]
> 
> <<<I'm sure the [source] tags don't work - I through them in there
> anyway.>>>
> 
> The program runs - however - it will give me 100 heads OR 100 tails.
> Can someone spot the logic error?  
> 
> Thanks
> 
> ~Dan
> 


From fredrik at pythonware.com  Sun Feb 19 14:35:36 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 19 Feb 2006 20:35:36 +0100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com><Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com><43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
Message-ID: <dtahaa$2mq$1@sea.gmane.org>

Alexander Schmolck wrote:

> You might want to argue about whether scriping language is a meaningful and
> useful concept, but it's really hard to see how you could talk about "scripting
> languages" without including python.

define "scripting language".

the only even remotely formal definition I've ever seen is "language with
designed to script an existing application, with limited support for handling
its own state".  Early Tcl and JavaScript are scripting languages, Python
is not.

</F>





From alanmk at hotmail.com  Wed Feb 15 12:22:13 2006
From: alanmk at hotmail.com (Alan Kennedy)
Date: 15 Feb 2006 09:22:13 -0800
Subject: Clarity: GIL, processes and CPUs etc
References: <1140022815.751692.313990@g47g2000cwa.googlegroups.com>
Message-ID: <1140024133.887236.253940@f14g2000cwb.googlegroups.com>

[adsheehan at eircom.net]
> I understand that embedding the interpreter in a C/C++ application
> limits it to one CPU.
> If the application is multi-threaded (system threads) in will not use
> additional CPUs as the interpreter is tied to one CPU courtesy of the
> GIL.
> True or False?

True, only when a thread is inside pure python code. C-level extensions
and library modules, e.g. I/O modules, release the GIL, thus permitting
other threads in the same process to run simultaneously. But only one
thread can be running *inside the python interpreter* at a time.

> I understand that forking or running multiple process instances of the
> above application would make use of multiple CPUs. This is because each
> process would have its own interpreter and GIL that is independent of
> any other process.
> True or False?

True. Every separate process will have its own python interpreter,
meaning it has its own GIL. Python code running in multiple processes
can execute truly simultaneously.

So you can run pure python code simultaneously on multiple cpus on a
multi-cpu box by using multiple independent processes. But if your
processes need to communicate, then you need to de/serialise
objects/parameters for transmission between those processes.

--
alan kennedy
------------------------------------------------------
email alan:              http://xhaus.com/contact/alan



From georgetoffer1 at yahoo.com  Mon Feb  6 15:02:49 2006
From: georgetoffer1 at yahoo.com (George T.)
Date: 6 Feb 2006 12:02:49 -0800
Subject: Accessing Windows Serial Port
Message-ID: <1139253898.601680.265220@g44g2000cwa.googlegroups.com>

I need to access the serial port via python on a windows machine.
Reading on the web, there are three solutions:  pyserial, siomodule and
USPP.  pyserial seems to be the best option since the other two are
tested with Windows 95 and older versions of python.  Would you agree
with this or have I missed an option?

Can anyone provide me an example of how to access the serial port with
pyserial?

Thanks
George T.



From rutski89 at gmail.com  Mon Feb  6 05:00:21 2006
From: rutski89 at gmail.com (Patrick M. Rutkowski)
Date: Mon, 06 Feb 2006 05:00:21 -0500
Subject: Python V2.4.2 source code
References: <43e710de$0$23286$db0fefd9@news.zen.co.uk>
Message-ID: <O5FFf.1082$pC6.83@fe11.lga>

John Dean wrote:

> Hi
> 
> Does anybody know from where I can get a copy of the source for Python
> V2.4.2. I downloaded what is reckoned to be the source code from
> www.python.org, but is turns out to be the MacXOS version with the core
> modules missing. The reason I am looking for the source code is so I can
> make a debug build
> 

Can you post a link to the tarball that you downloaded?


From kayama at st.rim.or.jp  Sat Feb 25 11:57:33 2006
From: kayama at st.rim.or.jp (Akihiro KAYAMA)
Date: Sun, 26 Feb 2006 01:57:33 +0900 (JST)
Subject: Pure python implementation of string-like class
In-Reply-To: <1140834412.120429.307300@i40g2000cwc.googlegroups.com>
References: <mailman.2417.1140830817.27775.python-list@python.org>
	<1140834412.120429.307300@i40g2000cwc.googlegroups.com>
Message-ID: <20060226.015733.74681660.kayama@st.rim.or.jp>

Hi bearophile.

In article <1140834412.120429.307300 at i40g2000cwc.googlegroups.com>,
bearophileHUGS at lycos.com writes:

bearophileHUGS> Maybe you can create your class using an array of 'L' with the array
bearophileHUGS> standard module.

Thanks for your suggestion. I'm currently using an usual list as a
internal representation. According to my understanding, as compared to
list, array module offers efficiency but no convenient function to
implement various string methods. As Python's list is already enough
fast, I want to speed up my coding work first.

-- kayama


From tim.golden at viacom-outdoor.co.uk  Tue Feb 14 06:43:34 2006
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 14 Feb 2006 11:43:34 -0000
Subject: file names longer than MAX_PATH under Windows 2003
Message-ID: <9A28C052FF32734DACB0A288A3533991044D2558@vogbs009.gb.vo.local>

[Sergey]

| I try to open file with pathname length 282 bytes:
| E:\files\..................\something.dat

| [... MS advise ...] just add prefix \\?\ to file name.
| But when I try to pass prefixed name to file(), I get the 
| same result as when I don't add the prefix: file not found. 

With a file called c:\temp\test.txt, I successfully
opened and read it like this:

print open (r"\\?\C:\temp\test.txt").read ()

So the basic functionality works. I didn't
artificially generate a long path to see if
there's a problem in that direction.

But note that r prefix to the string. Is it possible
that your string didn't include it? If not, then the
backslash character which Windows uses as a separator
can be stolen by Python which sees it as an escaping
character.

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________


From jeff at schwabcenter.com  Thu Feb  2 20:43:53 2006
From: jeff at schwabcenter.com (Jeffrey Schwab)
Date: Fri, 03 Feb 2006 01:43:53 GMT
Subject: OS.MKDIR( ) Overwriting previous folder created...
In-Reply-To: <1138916342.531311.190570@g14g2000cwa.googlegroups.com>
References: <1138916342.531311.190570@g14g2000cwa.googlegroups.com>
Message-ID: <tzyEf.169$915.70@southeast.rr.com>

Ernesto wrote:
> I couldn't find this with a search, but isn't there a way to overwrite
> a previous folder (or at least not perform osmkdir( ) if your program
> detects it already exists).  Thanks !

Would something like this help?

import os

def failsafe_mkdir(dirname):
	try:     os.mkdir(dirname)
	except:  return False
	else:    return True


if __name__ == "__main__":
	dirname = 'adir'
	if failsafe_mkdir(dirname):
		print "ok\n"
	else:
		print "couldn't create %s\n" % dirname


From wheel at wheel.not  Sat Feb 18 11:22:49 2006
From: wheel at wheel.not (wheel)
Date: Sat, 18 Feb 2006 08:22:49 -0800
Subject: Does Plone support distinct sets of users in subgroups?
References: <MPG.1e603f88182909e0989715@newsgroups.comcast.net>
	<2nkdv1thsom9nrba6ro9sap0v31erm220f@4ax.com>
Message-ID: <MPG.1e60e9b812c2668f989716@newsgroups.comcast.net>

I was shy of setting up to recieve a bunch of emails, but I'll scope out 
the nttp option. Thanks to both of you.

In article <2nkdv1thsom9nrba6ro9sap0v31erm220f at 4ax.com>, 
reply.in.the.newsgroup at my.address.is.invalid says...
> wheel:
> >I'm not sure if this is the right venue for Plone questions, if not, 
> >could someone ref me to a better one? 
> 
> The plone-users mailing list. Highly recommended.
> 
> >The discussion groups on the plone site are mailing lists and I'd 
> >rather not subscribe quite yet.
> 
> Why not? It's free, takes 1 minute and you can unsubscribe at any time.
> 
> >Does plone support distinct sets of users? 
> 
> Yes. There's a user-group mechanism.
> http://plone.org/documentation/tutorial/understanding-permissions/tutorial-all-pages
> 
> >That is, on a public website running plone, can it be configured such 
> >that when a user logs in they are allowed access to a subgroup's main 
> >page, 
> 
> That can be done with local roles on the sharing tab. See the link above.
> 
> >get the subgroup's newsletter as well as the main site's newsletter etc?
> 
> I'm not sure about that. I guess it depends on how you implement the
> newsletter. It may require a little customization or programming.
> 
> 


From xavier.morel at masklinn.net  Tue Feb  7 18:29:16 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Wed, 08 Feb 2006 00:29:16 +0100
Subject: Hi reliability files, writing,reading and maintaining
In-Reply-To: <mailman.1573.1139352181.27775.python-list@python.org>
References: <Y15Gf.280109$D47.254492@fe3.news.blueyonder.co.uk>
	<mailman.1573.1139352181.27775.python-list@python.org>
Message-ID: <dsbabm$o9d$1@aphrodite.grec.isp.9tel.net>

Terry Reedy wrote:
> "John Pote" <johnpote at blueyonder.co.uk> wrote in message 
> news:Y15Gf.280109$D47.254492 at fe3.news.blueyonder.co.uk...
>> I would wish to secure this data gathering against crashes of the OS,
> 
> I have read about people running *nix servers a year or more without 
> stopping.
> 
He'd probably want to check the various block-journaling filesystems to 
boot (such as Reiser4 or ZFS). Even though they don't reach DB-level of 
data integrity they've reached an interresting and certainly useful 
level of recovery.

> To transparently write to duplicate disks, lookup RAID (but not level 0 
> which I believe does no duplication).
> 
Indeed, Raid0 stores data across several physical drives (striping), 
Raid1 fully duplicates the data over several physical HDs (mirror raid), 
Raid5 uses parity checks (which puts it between Raid0 and Raid1) and 
requires at least 3 physical drives (Raid0 and Raid1 require 2 or more).

You can also nest Raid arrays, the most common nesting are Raid 01 
(creating Raid1 arrays of Raid0 arrays), Raid 10 (creating Raid0 arrays 
of Raid1 arrays), Raid 50 (Raid0 array of Raid5 arrays), and the "Raids 
for Paranoids", Raid 15 and Raid 51 arrays (creatung a Raid5 array of 
Raid1 arrays, or a Raid1 array of Raid5 arrays, both basically means 
that you're wasting most of your storage space for redundancy 
informations, but that the probability of losing any data is extremely low).


From lycka at carmen.se  Fri Feb 24 04:39:40 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 24 Feb 2006 10:39:40 +0100
Subject: MySQLdb slow on MySQL 5
In-Reply-To: <1140727082.800917.44550@i40g2000cwc.googlegroups.com>
References: <1140716394.225560.27920@t39g2000cwt.googlegroups.com>
	<mailman.2364.1140721473.27775.python-list@python.org>
	<1140727082.800917.44550@i40g2000cwc.googlegroups.com>
Message-ID: <dtmk8t$an9$1@wake.carmen.se>

timothy.williams at nvl.army.mil wrote:
  > I'm not calling COMMIT at all.

Then you must be using autocommit if your records stay in
the table. An DB-API 2.0 compliant adapter should turn off
autocommit by default! Does MyISAM even support proper
commit handling?

Oh well, Oracle will probably kill MySQL soon. Good! I'd
use a real database system. It hurts my Swedish heart that
one of the best known Swedish software products is so bad.

It's one thing for some more inventive product like Skype
to pave its own path, but to build something called an
SQL database with such a complete disregard of the SQL
standard seems like Microsoft in the 80's or 90's to me.

If you must have a Swedish database server, use Mimer,
otherwise PostgreSQL 8.2 is a good open source alternative,
and all the major vendors have gratis versions now.
Oracle is a resource hog, and a pain to download and
install though.


From python at hope.cz  Tue Feb  7 08:59:07 2006
From: python at hope.cz (Lad)
Date: 7 Feb 2006 05:59:07 -0800
Subject: Pythonwin - problem with non English character
Message-ID: <1139320747.851529.206000@g14g2000cwa.googlegroups.com>

Hello,
is there a way how to use PythonWin for editting of Python files that
consist non English characters? In my Python scripts I need to use(
print) Cyrilic characters and with PythonWin it is not possible . I use

PythonWin 2.3.4 (#53, May 25 2004, 21:17:02) [MSC v.1200 32 bit
(Intel)] on win32.
Thank you
L.



From nicola.musatti at gmail.com  Fri Feb  3 08:05:20 2006
From: nicola.musatti at gmail.com (Nicola Musatti)
Date: 3 Feb 2006 05:05:20 -0800
Subject: OO conventions
In-Reply-To: <pan.2006.02.02.11.08.33.964@REMOVETHIScyber.com.au>
References: <mailman.1334.1138833641.27775.python-list@python.org>
	<pan.2006.02.02.11.08.33.964@REMOVETHIScyber.com.au>
Message-ID: <1138971920.353603.38040@f14g2000cwb.googlegroups.com>


Steven D'Aprano wrote:
[...]
> If a class has a natural, obvious default state (e.g. a mutable string
> class might start off empty, a mutable int class might start off as zero,
> a binary tree might start off as an empty node with no children) then it
> makes sense to initialise the class, then add your data.
>
> But if the class has no natural default state, then it makes no sense to
> create an "empty object" with no data, a "non-image image" so to speak.

I don't think this is all there is to it. Even though a class such as
Image might not have a sensible default, initial state it still might
not be reasonable to burden it with the ability to collect the
information needed to reach such an initial state. To put it it another
way: a car is a car, it isn't a car factory.

> In other words, if you find yourself writing methods like this:
>
> class Klass:
>     def foo(self):
>         if self.data is None:
>             raise KlassError("Can't foo an uninitialized Klass object.")
>         else:
>             # do something

Factory functions (or classes) are there to solve this problem and
still allow a clean separation of concerns. Although instances of Klass
are created uninitialized, they only live in this state within their
factory and only reach trhe outside world only when they are in a
usable state.

Cheers,
Nicola Musatti



From John-Whitlock at ieee.org  Tue Feb 28 08:33:46 2006
From: John-Whitlock at ieee.org (JW)
Date: 28 Feb 2006 05:33:46 -0800
Subject: PEP 354: Enumerations in Python
In-Reply-To: <87accdplbj.fsf@rose.polar.local>
References: <87accdplbj.fsf@rose.polar.local>
Message-ID: <1141133625.981408.68280@i39g2000cwa.googlegroups.com>

It seems the concensus is that empty enums should be allowed for
consistancy, and to support the loop that doesn't.  I thought I'd find
some data points in other languages as a guide:

* C - builtin, empty enumerations not allowed
* C++ - builtin, empty enumerations allowed.  C++ doesn't have
iteration over a enumeration, except as a side-effect of direct
translation from elements to integerts (and then, only for a
sequentially assigned enumeration).  An enumeration is a type, so it
can be thrown (raised) as an exception -
http://oopweb.com/CPP/Documents/CPPAnnotations/Volume/cplusplus16.html#EMPTYENUM
* Java - builtin, empty enumerations allowed previously to 1.5, but
maybe not after -
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5081785
* OCaml - library, empty enumerations allowed as a consequence of being
able to add and remove enumeration elememts:
http://ocaml-lib.sourceforge.net/doc/Enum.html

I realize this is a strange and short list, but it's all I can do with
5 min of Google and a little testing.



From dcrespo at gmail.com  Fri Feb 17 09:02:35 2006
From: dcrespo at gmail.com (Daniel Crespo)
Date: 17 Feb 2006 06:02:35 -0800
Subject: Print a PDF transparently
Message-ID: <1140184955.674138.275010@o13g2000cwo.googlegroups.com>

Hi to all,

I want to print a PDF right from my python app transparently. With
"transparently" I mean that no matter what program handles the print
petition, the user shouldn't be noticed about it.

For example, when I want to print a PDF, Adobe Acrobat fires and keep
opened. This is what I don't want to happen (and I thing there are a
lot of people who want this too). So I just want to send the PDF to the
right handler and print it. That's all.

I've seen some things like Adobe's Postscript driver that can read a
PDF, or Ghostscript, but I still don't know how to use it.

Any help for printing a PDF transparently?

Thank you

Daniel



From renato.ramonda at gmail.com  Fri Feb 10 17:31:55 2006
From: renato.ramonda at gmail.com (Renato)
Date: 10 Feb 2006 14:31:55 -0800
Subject: installing python on a server?
In-Reply-To: <DV6Hf.1597$No6.37987@news.tufts.edu>
References: <PB6Hf.1596$No6.37972@news.tufts.edu>
	<hntpu1pmctfaa61ns32k539nisvvljd96n@4ax.com>
	<DV6Hf.1597$No6.37987@news.tufts.edu>
Message-ID: <1139610715.439681.185510@g44g2000cwa.googlegroups.com>

You mentioned using python for web apps: with which framework?
(TurboGears, CherryPy, Subway, Django, whatever) Or only for cgi?

With which web server? (Apache, Twisted, Zope, etc.)

On which linux platform? (Slackware, Debian, Fedora/RedHat, Suse, etc)

I think you'll have to think about other questions before.

On systems with package management (pretty much all of them, except
Slack) install is a matter of a few commands. And you can automate it,
obviously.

-- 
bye,
Renato



From iddw at hotmail.com  Fri Feb 10 19:54:16 2006
From: iddw at hotmail.com (Dave Hansen)
Date: Fri, 10 Feb 2006 18:54:16 -0600
Subject: is there a better way?
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
	<1139599489.308928.54190@g44g2000cwa.googlegroups.com>
	<dsj1hd$hpd$1@news2.rz.uni-karlsruhe.de>
Message-ID: <n3dqu1tv79b23hmmsmhr295e72il4q5mdb@4ax.com>

On Sat, 11 Feb 2006 01:37:59 +0100 in comp.lang.python, Sch?le Daniel
<uval at rz.uni-karlsruhe.de> wrote:

>Lonnie Princehouse wrote:
>> everybody is making this way more complicated than it needs to be.
>> 
>> storage = list[:list.index(O)]
>
>the question is whether the old list is needed in the future or not
>if not then it would be easer/mor efficient to use
>
>del lst[lst.index(0):]

And you're both forgetting the list can end with X.  the index method
raises a ValueError exception if the desired value is not found in the
list.  Assuming you want to keep the original list and create a new
list called storage, you could try

   if lst[-1] == X:
      storage = lst[:]
   else:
      storage = lst[:lst.index(O)]

or even

   try:
      storage = lst[:lst.index(O)]
   except ValueError:
      storage = lst[:]

(WARNING: untested!)

Regards,


   
                                        -=Dave

-- 
Change is inevitable, progress is not.


From dbasch at yahoo.com  Mon Feb 27 15:59:54 2006
From: dbasch at yahoo.com (Derek Basch)
Date: 27 Feb 2006 12:59:54 -0800
Subject: Matplotlib logarithmic scatter plot
Message-ID: <1141073994.346490.16070@j33g2000cwa.googlegroups.com>

Can anyone give any suggestions on how to make a logarithmic (base 10)
x and y axis (loglog) plot in matplotlib? The scatter function doesn't
seem to have any log functionality built into it.

Thanks,
Derek Basch

P.S. I suck at math so feel free to make me feel stupid if it is really
easy to do :).



From eoinrogers at gmail.com  Sun Feb  5 11:22:57 2006
From: eoinrogers at gmail.com (Byte)
Date: 5 Feb 2006 08:22:57 -0800
Subject: Learning Python
In-Reply-To: <ds588v$6s4$02$1@news.t-online.com>
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
	<ds588v$6s4$02$1@news.t-online.com>
Message-ID: <1139156577.897100.69140@g43g2000cwa.googlegroups.com>

Florian Nykrin, that works! Thanks!

p.s. Xavier Morel, you seem to be using Windows, not Linux, and I got
the idea of stacking input on a raw_input from the official Python
Tutorial.



From keith.b.perry at gmail.com  Tue Feb 21 14:56:30 2006
From: keith.b.perry at gmail.com (kbperry)
Date: 21 Feb 2006 11:56:30 -0800
Subject: Zope/Plone - Is it the right solution?
In-Reply-To: <mailman.2254.1140546385.27775.python-list@python.org>
References: <1140532818.195281.316580@g44g2000cwa.googlegroups.com>
	<dtfan0$fsi$1@sea.gmane.org>
	<mailman.2254.1140546385.27775.python-list@python.org>
Message-ID: <1140551790.603709.11570@g43g2000cwa.googlegroups.com>

Rene and Tim,
Thanks for the help!  I am glad that I didn't rule out Plone yet
because I was able to download and install quickly.  My "site" was up
and running very quickly.

For this class we are more focused on the HCI/usability stuff than we
are the coding.  I have plenty of other classes that focus on the
coding.  I am hoping that we could build an extension or two using
python (if needed), and I would like to completely redesign the main
"skin," but other than that I need the CMS tool so Plone looks like a
great fit.

I tried installing Zope last night, but when I did, I couldn't find out
how to even start it for about an hour after searching.  I was worried
that if I went the Plone/Zope route, then I would need to know both.
It looks like Plone just makes Zope much easier to work with.



From hanxianpei at gmail.com  Sun Feb 19 07:54:10 2006
From: hanxianpei at gmail.com (hanxianpei at gmail.com)
Date: 19 Feb 2006 04:54:10 -0800
Subject: How to configure proxy authentication when using urllib2?
In-Reply-To: <1140352929.945363.279200@z14g2000cwz.googlegroups.com>
References: <1140352929.945363.279200@z14g2000cwz.googlegroups.com>
Message-ID: <1140353650.933279.142750@o13g2000cwo.googlegroups.com>

I want to know that, too!



From cowbertvonmoo at gmail.com  Sat Feb 18 02:37:22 2006
From: cowbertvonmoo at gmail.com (cowbertvonmoo at gmail.com)
Date: 17 Feb 2006 23:37:22 -0800
Subject: Multi-threaded SSL
References: <1140240776.132359.57800@g14g2000cwa.googlegroups.com>
	<1haxdd0.1m3ovx41i1g74uN%aleaxit@yahoo.com>
Message-ID: <1140248242.148101.87280@f14g2000cwb.googlegroups.com>

Thanks Alex.  I hadn't noticed that example.  I gave it a shot and
still have the synchronization problems.  While this may be because of
a lack of understanding of twisted threads (again, perhaps I'm just not
looking in the right places, but even the the API reference is sparse
of explanation), I strongly suspect that there's something going on at
a lower level, like the Open SSL wrapper or Open SSL on the system
level.  At this point, I'd just like to know if I should cut my losses
and try a very rapid polling solution (*cringes*).  Here are my
attempts:

Twisted SSL Foray:
http://cixar.com/svn/mage/twisted_ssl_foray.py
http://cixar.com/websvn/filedetails.php?repname=Cixar&path=%2Fmage%2Ftwisted_ssl_foray.py&rev=0&sc=0

Bare SSL Foray:
http://cixar.com/svn/mage/bare_ssl_foray.py
http://cixar.com/websvn/filedetails.php?repname=Cixar&path=%2Fmage%2Fbare_ssl_foray.py&rev=0&sc=0

In the twisted example, I'm logging before and after I start sleeping
in the process request section to note whether the pages are being
processed in parallel.  They aren't.  My log message order for two
asynchronous page requests should look like:

start (first)
start (second)
stop (first)
stop (second)

But I'm rather getting:

start (first)
stop (first)
start (second)
stop (second)

Again, grateful for your help,
Kris Kowal.



From felipe.lessa at gmail.com  Tue Feb 28 18:07:00 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Tue, 28 Feb 2006 20:07:00 -0300
Subject: Rounding up to the nearest exact logarithmic decade
In-Reply-To: <20060228174759.d30npd3k04okkwss@geophile.com>
References: <1141165716.023456.318240@u72g2000cwu.googlegroups.com>
	<20060228174759.d30npd3k04okkwss@geophile.com>
Message-ID: <1141168020.10021.36.camel@kenshin>

Em Ter, 2006-02-28 ?s 17:47 -0500, jao at geophile.com escreveu:
> Quoting Derek Basch <dbasch at yahoo.com>:
> 
> > Given a value (x) that is within the range (1e-1, 1e7) how do I round
> > (x) up to the closest exact logarithmic decade? For instance:
> 
> How about this:
> 
> def roundup(x):
>     if x < 1:
>         return 1
>     else:
>         return '1' + ('0' * len(str(int(x))))

No dice. First, it returns an int for some cases and a string for the
others. Second, casting from str to int and vice-versa and concatenating
strings won't perform any good. I wouldn't like this hack on my code.

My 2?,
Felipe.

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From huyslogic at gmail.com  Wed Feb  8 10:39:10 2006
From: huyslogic at gmail.com (Huy)
Date: 8 Feb 2006 07:39:10 -0800
Subject: apostrophe or double quote?
In-Reply-To: <oIE*M4N+q@news.chiark.greenend.org.uk>
References: <1139370460.360400.232500@z14g2000cwz.googlegroups.com>
	<mailman.1589.1139373128.27775.python-list@python.org>
	<oIE*M4N+q@news.chiark.greenend.org.uk>
Message-ID: <1139413150.237052.47320@o13g2000cwo.googlegroups.com>

Thank you for all your help; it makes perfect sense now.



From deets at nospam.web.de  Sun Feb  5 08:31:00 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 05 Feb 2006 14:31:00 +0100
Subject: rexec in jython??
References: <1139138133.072742.282710@z14g2000cwz.googlegroups.com>
	<1139140115.016898.72360@z14g2000cwz.googlegroups.com>
	<1139142998.236991.130470@g47g2000cwa.googlegroups.com>
	<44mb0pF2rqu1U1@uni-berlin.de>
	<1139146174.981081.108700@o13g2000cwo.googlegroups.com>
Message-ID: <44md0kF2nkeqU1@uni-berlin.de>

Mark Fink wrote:

> This is the original code section of the library including the
> comments:
> class AutoAdapter(TypeAdapter):
>     """
>     This adapter returns a type based on the format of the table cell
>     contents, following python's rules for literals (plus a few
> others).
>     We could fall back on this when we don't know what type is
> expected.
>     I am lazy and so use rexec to do the work.
> 
>     #Note: The RExec class can prevent code from performing unsafe
>     #operations like reading or writing disk files, or using TCP/IP
>     #sockets. However, it does not protect against code using
>     #extremely large amounts of memory or processor time.
>     """
>     r_eval = RExec().r_eval
>     def parse(self,s):
>         if s.strip().lower() == 'true':
>             return 1
>         elif s.strip().lower() == 'false':
>             return 0
>         else:
>             try:
>                 return self.r_eval(s)
>             except SystemExit:
>                 return None
>             except:
>                 return s
> 
> I completely removed the import of rexec and replaced "return
> self.r_eval(s)" with "return self.eval(s)"

And what does self.eval look like? Crystal ball still not working....

Diez


From gene.tani at gmail.com  Thu Feb 16 08:46:13 2006
From: gene.tani at gmail.com (gene tani)
Date: 16 Feb 2006 05:46:13 -0800
Subject: web crawler in python or C?
In-Reply-To: <1140069412.051298.242150@g44g2000cwa.googlegroups.com>
References: <1140069412.051298.242150@g44g2000cwa.googlegroups.com>
Message-ID: <1140097573.856141.282440@f14g2000cwb.googlegroups.com>


abhinav wrote:
> Hi guys.I have to implement a topical crawler as a part of my
> project.What language should i implement

Oh, and there's some really good books out there, besides the Orilly
Spidering Hacks.  Springer Verlag has a couple books on "Text Mining"
and at least a couple books with "web intelligence" in the title.
Expensive but worth it.



From simon at brunningonline.net  Tue Feb  7 05:03:44 2006
From: simon at brunningonline.net (Simon Brunning)
Date: Tue, 7 Feb 2006 10:03:44 +0000
Subject: python
In-Reply-To: <20060206222757.3277.qmail@web25701.mail.ukl.yahoo.com>
References: <20060206222757.3277.qmail@web25701.mail.ukl.yahoo.com>
Message-ID: <8c7f10c60602070203u1a939f64lf6adda6cc4451d3@mail.gmail.com>

On 2/6/06, Brain Murphy <brianomorchoe at yahoo.co.uk> wrote:
> I am new to python and programming but i was wondering, what can i program
> with python??
> Brian

Uh, that's a hard one to answer. You can program just about anything
in Python except device drivers and operating systems - and I'm
prepaired tlo be proved wrong on those last two.

What do you *want* to program?

--
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From dausha at gmail.com  Thu Feb  9 20:49:24 2006
From: dausha at gmail.com (Ben Wilson)
Date: 9 Feb 2006 17:49:24 -0800
Subject: Newbie Q: dynamically assigning object attribute
In-Reply-To: <1139535868.984020.204620@g44g2000cwa.googlegroups.com>
References: <1139535715.486234.195690@g44g2000cwa.googlegroups.com>
	<1139535868.984020.204620@g44g2000cwa.googlegroups.com>
Message-ID: <1139536164.525526.210610@g14g2000cwa.googlegroups.com>

That's it. I should spend more time R-ingTFM. I kept looking for some
class-based solution and there was a built in. Perfectly logical.

Thanks,
Ben



From agriff at tin.it  Sun Feb 26 17:55:04 2006
From: agriff at tin.it (Andrea Griffini)
Date: 26 Feb 2006 14:55:04 -0800
Subject: Is Python a Zen language?
In-Reply-To: <9o1Mf.39804$H71.16633@newssvr13.news.prodigy.com>
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
	<9o1Mf.39804$H71.16633@newssvr13.news.prodigy.com>
Message-ID: <1140994504.247709.256020@u72g2000cwu.googlegroups.com>

I think that the classification has some meaning, even if of course any
language has different shades of both sides. I'd say that with python
is difficult to choose one of the two categories because it's good both
as a pratical language and as a mind-opener language.

IMO another language that would be hard to classify is COBOL ... but
for other reasons :-)

Andrea



From rtilley at vt.edu  Tue Feb 14 09:41:52 2006
From: rtilley at vt.edu (rtilley)
Date: Tue, 14 Feb 2006 09:41:52 -0500
Subject: windows security descriptors
Message-ID: <dstbod$sfn$1@solaris.cc.vt.edu>

Hope this isn't too inappropriate:

Thanks to tips from comp.lang.python and the Python win32 mailing list, 
I've been able to begin using Python to work with Windows security 
descriptors with some small success.

http://opensource.w2k.vt.edu/brad_scripts.php

I've just started, not a whole lot there yet, but it's all pure Python. 
It's been my experience that this stuff isn't well documented on the Web 
(hence my post here to share what I've learned so far). So, anyone 
interested in this topic may download the scripts. Feedback from Windows 
security descriptor gurus would be great!

Thanks,
Brad


From augustus.kling at gmail.com  Sat Feb 11 07:53:14 2006
From: augustus.kling at gmail.com (augustus.kling at gmail.com)
Date: 11 Feb 2006 04:53:14 -0800
Subject: How to check...
In-Reply-To: <1139662113.389812.128320@g43g2000cwa.googlegroups.com>
References: <1139660094.920792.136560@g14g2000cwa.googlegroups.com>
	<1139662113.389812.128320@g43g2000cwa.googlegroups.com>
Message-ID: <1139662394.466159.146810@g43g2000cwa.googlegroups.com>

Additional info: You will documentation in the Python help utility by
typing the module name 're' or 'sre'



From bignose+hates-spam at benfinney.id.au  Tue Feb 28 19:50:17 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 01 Mar 2006 11:50:17 +1100
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<1141019214.153904.115220@j33g2000cwa.googlegroups.com>
	<zIwMf.9924$PR2.201420@twister2.libero.it>
	<877j7gz53k.fsf@rose.polar.local> <7xd5h8jnk1.fsf@ruckus.brouhaha.com>
Message-ID: <87hd6j3s51.fsf@rose.polar.local>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:

> Ben Finney <bignose+hates-spam at benfinney.id.au> writes:
>> If an enumeration object were to be derived from, I would think it
>> just as likely to want to have *fewer* values in the derived
>> enumeration. Subclassing would not appear to offer a simple way to
>> do that.
>
> pentium_instructions = enum('add', 'sub', 'mul', ) # etc
>
> athlon64_instructions = enum('add64', 'sub64', # etc
>                              base_enum=pentium_instructions)
>
> # 386 has no floating point unit
> i386_instructions = enum(base_enum=pentium_instructions,
>                          remove=('addf', 'subf', 'mulf',))  # etc

These don't seem simple or elegant. I don't see a particular benefit
to doing it that way, rather than being explicit about manipulating
the member list::

    pentium_instructions = enum('add', 'sub', 'mul')
    athlon64_instructions = enum(
        *[ str(i) for i in pentium_instructions] + ['add64', 'sub64'] )
    i386_instructions = enum(
        *[ str(i) for i in pentium_instructions
            if i not in ['addf', 'subf', 'mulf'] ] )

I don't see a benefit to having the enum constructor grow extra
keyword arguments for operating on lists, when a list has its own
methods for doing so.

-- 
 \         "A fine is a tax for doing wrong. A tax is a fine for doing |
  `\                                              well."  -- Anonymous |
_o__)                                                                  |
Ben Finney


From peter at engcorp.com  Fri Feb  3 18:02:17 2006
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 03 Feb 2006 18:02:17 -0500
Subject: Python on Windows
In-Reply-To: <1139004520.825307.189290@g47g2000cwa.googlegroups.com>
References: <mailman.1389.1138987315.27775.python-list@python.org>
	<1139004520.825307.189290@g47g2000cwa.googlegroups.com>
Message-ID: <ds0ndi$nme$2@sea.gmane.org>

svbrk at start.no wrote:
>>I would love a single .exe file that would run without ANY OTHER FILES
>>even if it was 50 Mb!
> 
> 
> You should look at pyinstaller
> (http://pyinstaller.hpcf.upr.edu/cgi-bin/trac.cgi), as far as I know
> the only py->exe compiler that makes single file executables for
> windows. You may even bundle additional files as well, such as images.

py2exe can do this now too.



From hancock at anansispaceworks.com  Wed Feb  1 19:58:03 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Wed, 1 Feb 2006 18:58:03 -0600
Subject: PIL and transparent GIFs
In-Reply-To: <1138833665.400460.232350@f14g2000cwb.googlegroups.com>
References: <43e12849$0$1145$7a628cd7@news.club-internet.fr>
	<1138833665.400460.232350@f14g2000cwb.googlegroups.com>
Message-ID: <20060201185803.34d45eed@samwise.anansi>

On 1 Feb 2006 14:41:05 -0800
"Kamilche" <klachemin at comcast.net> wrote:
> It can only read transparency, it can't write it. I went
> looking and found that out a couple weeks ago.

There was a patch published at one time that was supposed
to fix this. I remember doing some testing and not finding
it to work perfectly, but I may have been doing something
wrong.  Can't recover it at the moment, but some search
engine work might turn it up.

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From lycka at carmen.se  Sun Feb  5 14:49:46 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Sun, 05 Feb 2006 20:49:46 +0100
Subject: Generators vs. Functions?
In-Reply-To: <Xns9761669F04C2Aduncanbooth@127.0.0.1>
References: <0001HW.C00ABC2B000323A6F0335550@news.individual.de>
	<43E50E73.40504@kzoo.edu>
	<mailman.1426.1139097119.27775.python-list@python.org>
	<gkeFf.434944$2k.218378@pd7tw1no>
	<pan.2006.02.05.08.14.28.103057@REMOVETHIScyber.com.au>
	<Xns9761669F04C2Aduncanbooth@127.0.0.1>
Message-ID: <ds5ksq$ed0$1@wake.carmen.se>

Duncan Booth wrote:
> Steven D'Aprano wrote:
>>So on the basis of my tests, there is a small, but significant speed
>>advantage to _calling_ a function versus _resuming_ a generator.
> 
> I get the same, but the difference is much less on my system:

With Python 2.4? Doesn't surprise me a bit.

I tested with 2.3 (vanilla Red Hat EL4 install) and it seems Steven
used 2.3 as well. My little test was just an attempt to test a claim
that the setup time would be shorter for generator calls than for
function calls. It's so easy to test timing with Python, so it's
surprising that people speculate so much about theories with no
measurements.

Who knows what the call time ratios will be in Python 2.6?

I think the important point is the one Fredrik is making: You
won't have a function implementation or a generator implementation
with the same code body.

The other differences in the code will typically mean much more than
the call overhead. If we're in some nested loop where we call a
function so trivial that the call overhead makes performance suffer,
by all means, inline these few lines of code in the loop!


From johnjsal at NOSPAMgmail.com  Tue Feb 28 15:00:57 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 28 Feb 2006 20:00:57 GMT
Subject: escaping quotes
In-Reply-To: <mailman.2526.1141153301.27775.python-list@python.org>
References: <pN0Nf.1679$No6.39699@news.tufts.edu>
	<mailman.2526.1141153301.27775.python-list@python.org>
Message-ID: <ZZ1Nf.1685$No6.39845@news.tufts.edu>

Fredrik Lundh wrote:

> because the interactive prompt echos the result back to you as
> a Python literal, where possible.  compare

Ah, of course! I forgot it wasn't 'print'ing it.

Thanks!


From larry.bates at websafe.com  Wed Feb 15 20:02:39 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Wed, 15 Feb 2006 19:02:39 -0600
Subject: how to get function names from the file
In-Reply-To: <1140041022.500870.141430@g14g2000cwa.googlegroups.com>
References: <1140041022.500870.141430@g14g2000cwa.googlegroups.com>
Message-ID: <43F3CF2F.6090206@websafe.com>

Petr Jakes wrote:
> I have got names of functions stored in the file. For the simplicity
> expect one row only with two function names: printFoo, printFOO
> In my code I would like to define functions and then to read function
> names from the file, so the functions can be executed in the order the
> function names are stored in a file.
> 
> While trying to read the names from the file I am getting always
> "strings" and I am not able to execute them.
> 
> I would like to write my code so it will look something like:
> 
> def printFoo():
>     print "foo"
> 
> def printFOO():
>     print "FOO"
> 
> # here I would like to read the file with the function names sequences
> # and to create tuple which will contain the function names.
> # After that I would like to call functions from the tuple:
> 
> functions=(printFoo, printFOO)
> for function in functions:
>    function()
> 
> Thanks for your postings
> Petr Jakes
> 
I would do this as follows:

Create dictionary with the function names as keys and the pointer to
function definition as value:

fdict={'printFoo': printFoo, 'printFOO': printFOO}
functions=('printFoo', 'printFOO')
for function in function:
    if fdict.has_key(function: fdict[function]()
    else:
        print "No function named=%s defined" % function

-Larry Bates





From lycka at carmen.se  Thu Feb  2 10:29:15 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 02 Feb 2006 16:29:15 +0100
Subject: OO conventions
In-Reply-To: <1ha4cmm.7ho4df1vw3a19N%aleaxit@yahoo.com>
References: <mailman.1334.1138833641.27775.python-list@python.org>
	<pan.2006.02.02.11.08.33.964@REMOVETHIScyber.com.au>
	<1ha4cmm.7ho4df1vw3a19N%aleaxit@yahoo.com>
Message-ID: <drt8gc$taq$1@wake.carmen.se>

Alex Martelli wrote:
> Steven D'Aprano <steve at REMOVETHIScyber.com.au> wrote:
>>And now, at long last, the image object actually is an image. So why make
>>this a two step process? Whatever the Image() initialization does, why
>>can't it be done automatically when you read the file?
> 
> "Two-step construct" ("2SC") is a reasonably well-known and widely
> useful idiom, and it can serve several kinds of purposes, many but not
> all of which are tied to persistence. 

I've seen it used as a C++ coding standard when e.g. loading
instances from databases (Person p=Person(); p.init(id);)
since it was considered bad to have code in the constructor
which could throw exceptions. If you make a new Person on
the heap, and catch an exception from the constructor, are
you sure that you delete the object?


From fredrik at pythonware.com  Tue Feb 21 10:13:36 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 21 Feb 2006 16:13:36 +0100
Subject: Zope/Plone - Is it the right solution?
References: <1140532818.195281.316580@g44g2000cwa.googlegroups.com>
Message-ID: <dtfan0$fsi$1@sea.gmane.org>

"kbperry" wrote:

> I am currently a student, and for our HCI class project we are
> redeveloping our CS website.  I attend a very large university (around
> 30,000 students), and the CS site will need to be updated by many
> people that don't have technical skills (like clerical staff).
>
> The biggest problem with the current site is that not enough people
> have access to update it.  Since I love python, these seemed like
> viable solutions.
>
> 1)  Is Zope/Plone overkill for this type of project?
>
> 2)  Why use Plone vs. straight up Zope?
>
> 3)  Is there a way to get over the steep learning curves (that I have
> read about)?

do you want to build a web application, use a ready-made CMS, or is the goal to
easily get lots of information on to the (intra)web ?

if the latter, a modern wiki with good access control could be worth investigating:

    http://moinmoin.wikiwikiweb.de/
    http://moinmoin.wikiwikiweb.de/HelpOnAccessControlLists

(for performance, you may want to run the wiki behind mod_proxy)

if you want a ready-made content management system, pick Plone.

if you want to build your own web application, you know Python reasonably
well, you don't want much of a learning curve, and you want to start right now,
pick Django.

(I'm now leaving the microphone to the "pick me pick me!" crowd ;-)

</F> 





From grahamd at dscpl.com.au  Thu Feb 16 19:08:41 2006
From: grahamd at dscpl.com.au (grahamd at dscpl.com.au)
Date: 16 Feb 2006 16:08:41 -0800
Subject: mod_python and open HTTP connection
References: <op.s421hyqcix6gqv@charles>
Message-ID: <1140134921.536636.12500@o13g2000cwo.googlegroups.com>


Charles wrote:
> Hello, I'm think about using mod_python for a project but I need to make
> sure: Does mod_python time out after a minute ? (I hope not).

Mod_python itself doesn't time out. If such a thing happened it
would be because of how Apache, some intermediate proxy or
the client is configured.

> If I leave
> an HTTP connection open so that the content keeps loading inside the
> browser window indefinately, and if I close the browser window, the
> mod_python process is terminated, right?

If the mod_python handler is periodically writing data back to the
browser, at the point the socket connection from the client closes,
the attempt to write data back to the client by the mod_python
handler will result in an IOError exception being raised. Presuming
that your handler code doesn't catch this and ignore it, it should
cause the handler to abort.

Note though that it doesn't cause any process to be terminated as
that is not how Apache/mod_python work. It will cause just that
current request to be terminated. That thread of control can then
be reused to handle a subsequent request.

BTW, for tricky questions on mod_python you are better of using
the mod_python mailing list. Details on the mod_python web site.

Graham



From siona at chiark.greenend.org.uk  Thu Feb  9 07:37:58 2006
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 09 Feb 2006 12:37:58 +0000 (GMT)
Subject: Number Format function
References: <mailman.1603.1139418641.27775.python-list@python.org>
	<mailman.1623.1139430803.27775.python-list@python.org>
	<1139433369.390308.170070@f14g2000cwb.googlegroups.com>
	<Xns9764ACC5C2CC6rzed@208.49.80.253>
Message-ID: <sRy*P3S+q@news.chiark.greenend.org.uk>

Rick Zantow  <rzantow at gmail.com> wrote:
>>>> print number_format( 2312753.44500000, 2 )
>2,312,753.44
>>>> print number_format( 2312753.44500001, 2 )
>2,312,753.45
>
>I would expect the first to produce the same results as the second, but, 
>I suppose because of one of floating point's features, it doesn't work 
>that way.

>>> 2312753.44500000
2312753.4449999998
>>> 2312753.44500001
2312753.4450000101

So, yeah, the nature of floating points is going to make that
first one round "unexpectedly".

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From nszabolcs at gmail.com  Wed Feb  1 11:43:21 2006
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 1 Feb 2006 08:43:21 -0800
Subject: unicodedata.name
Message-ID: <1138812201.763863.243720@o13g2000cwo.googlegroups.com>

the unicodedata manual sais:
"
name(  	unichr[, default])
    Returns the name assigned to the Unicode character unichr as a
string. If no name is defined, default is returned, or, if not given,
ValueError is raised.
"
what is the difference between "no name defined" and "not given"?
eg. '\n' why gives a ValueError?

>>> unicodedata.name(u'\n')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ValueError: no such name



From duncan.booth at invalid.invalid  Wed Feb 15 07:48:11 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 15 Feb 2006 12:48:11 GMT
Subject: how to write a C-style for loop?
References: <gZednVPdAtumI2_eRVn-jw@rcn.net>
	<xfDIf.178309$65.4923952@twister1.libero.it>
	<pan.2006.02.15.12.37.48.626409@REMOVETHIScyber.com.au>
Message-ID: <Xns976B823952200duncanbooth@127.0.0.1>

Steven D'Aprano wrote:

>> about range()/xrange(): what if you want to traslate this c-loop? for
>> (int i=1; i<50; i*=2)
> 
> That's a completely different question, so of course it has a completely
> different answer. Here is one way:

... various options snipped ...

and another way for use when you have more than one loop following this 
pattern:

def powerrange(base, start=0, limit=0):
    value = base**start
    while value < limit:
        yield value
        value *= base

        
for i in powerrange(2,0,50):
    dosomething(i)


Putting the question the other way round: how would you move the control 
logic out of the loop in C?


From no at spam.com  Thu Feb  2 20:27:55 2006
From: no at spam.com (DH)
Date: Thu, 02 Feb 2006 19:27:55 -0600
Subject: Another try at Python's selfishness
In-Reply-To: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
Message-ID: <GrGdnYYzsbcBLH_eRVn-iQ@comcast.com>

n.estner at gmx.de wrote:
> Having read previous discussions on python-dev I think I'm not the only
> Python programmer who doesn't particularly like python's "self"
> parameter:
> 
>     class Foo:
>         def bar(self, a,b):
>             return a+b
>     Foo().bar(1,2) => 3
> 
> The main reason (at least for me) is that there's simply too much
> "magic" in it. Why does the expression left of the '.' get promoted to
> the first parameter? It even goes further:
> 
>     Foo.bar(Foo(), 1,2)
> 
> works, but:
> 
>     Foo.bar(1,2,3)
> 
> doesn't, just because of the "magical first parameter" in a member
> function. But:
> 
>     Foo.__dict["bar"]__(1,2,3)
> 
> Does work.
> 
> The point is, I _do_ think it's a good idea to explicitly write
> "self.SomeMember" for member-access, so I thought: why can't we be
> equally explicit about member function declaration? Wouldn't it be nice
> if I could write (say, in Python 3k, or maybe later):
> 
>     class Foo:
>         def self.bar(a,b):
>             return a+b
>     Foo().bar(1,2) => 3

That's similar to ruby.  Really this isn't going to change in python,
at least not anytime soon.  If it really bothers you, then ruby is 
something to look into.
But I think most people who don't like the extraneous 'self' in python 
just consider it a minor inconvenience and don't even notice it after 
using python for a while.  It is only when you switch between python and 
other languages that you notice it again.

If python extends decorators to allow them to be applied to classes as 
well as functions (which is more likely to happen perhaps), then you'll 
see a bunch of useful hacks pop up to eliminate the need for 'self' in 
method declarations.


From steve at holdenweb.com  Tue Feb  7 12:36:11 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 07 Feb 2006 12:36:11 -0500
Subject: python-ldap
In-Reply-To: <1139330793.864675.302090@f14g2000cwb.googlegroups.com>
References: <1139330793.864675.302090@f14g2000cwb.googlegroups.com>
Message-ID: <dsalqe$2hj$1@sea.gmane.org>

btaranto at gmail.com wrote:
> y0!
> where can i get module of python-ldap to work with eclipse ide on
> windows?
> 
> tks!
> 
gOOgl3, man

PS: We tend to speak English here :-)
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From LittlePython at lost.com  Sun Feb 12 12:09:59 2006
From: LittlePython at lost.com (LittlePython)
Date: Sun, 12 Feb 2006 17:09:59 GMT
Subject: Newbie
References: <v3JHf.2731$lo3.2501@trnddc07>
	<43ef6433$0$25387$636a55ce@news.free.fr>
Message-ID: <HZJHf.2737$lo3.1139@trnddc07>

I am very new to python. I have been studying it for only a month or so. I
have been using vbscript for about 2-3 yrs and only recently been using it
rather heavily the past 9 months or so. I am new very new to oop. My main
use will be administrative scripting into the win3k, XP, AD domain,
55exchange and 2003exchange environments. I like to incorp wxpython (GUI)
into my scripts instead of HTA's that I have been using with VBS. I am also
finding myself being tasked with jobs that are outside the scope of VBS.
Well that's a lot to learn and I have a feeling that to many I am just
another member of  "The Ministry of STUPID Questions"

"Bruno Desthuilliers" <bdesth.quelquechose at free.quelquepart.fr> wrote in
message news:43ef6433$0$25387$636a55ce at news.free.fr...
> LittlePython a ?crit :
> > Is this a good place to post python questions from newbie's, or would
you
> > suggest another board?
>
> Well, depends on how newbie you are, both to Python and to programming,
> but yes, this is at least a good place to start. You may find that most
> other newsgroups are probably not the best places to post
> python-specific questions anyway !-)
>
> We usually don't eat newbies for lunch so, in the worst case, you might
> be redirected to the python-tutor mailing-list (for ubernewbies) or the
> Fine Manual (that you are of course actively reading right now, isn't it
> ?) when appropriate.
>
> > Thx
>
> You're welcome.
>
> Another question ?-)




From rupole at hotmail.com  Thu Feb 16 20:55:07 2006
From: rupole at hotmail.com (Roger Upole)
Date: Thu, 16 Feb 2006 20:55:07 -0500
Subject: Seaching Active Directory via ADO
References: <g_7Jf.33401$0H1.22606@trnddc04>
	<1140138661.484502.86380@f14g2000cwb.googlegroups.com>
	<56aJf.78250$_D1.4370@trnddc03>
	<1140142239_1425@sp6iad.superfeed.net>
	<UtaJf.78260$_D1.52493@trnddc03>
Message-ID: <1140144965_1489@sp6iad.superfeed.net>

You could also accomplish the same thing using the
Command object, but this way is usually more concise
for plain Sql.

         Roger

"LittlePython" <LittlePython at lost.com> wrote in message
news:UtaJf.78260$_D1.52493 at trnddc03...
> I notice there is no adodb.command. This is not required?
> Thx for the example!
> "Roger Upole" <rupole at hotmail.com> wrote in message
> news:1140142239_1425 at sp6iad.superfeed.net...
> > Here's a short example that uses ADO to search for a
> > user by wildcard.
> >
> > import win32com.client
> > c = win32com.client.Dispatch("ADODB.Connection")
> > c.Open("Provider=ADSDSOObject")
> >
> > rs,rc=c.Execute("""
> > SELECT adspath, title, name
> > From 'LDAP://DC=yourdomain, DC=COM'
> > where objectClass='user' and name='Roger*'
> > """)
> >
> > while not rs.EOF:
> >     for f in rs.Fields:
> >         print f.Name, f.Value
> >     rs.MoveNext()
> >
> >     hth
> >           Roger
> >
> > "LittlePython" <LittlePython at lost.com> wrote in message
> > news:56aJf.78250$_D1.4370 at trnddc03...
> > > Thanks but I was looking more for ADO com object than ADSI or ldap.
> > > For some strange reason it is very hard to locate any working scripts
> that
> > > use ADO  to connect and search AD. Is there an issue with ADO and
python
> > > when connecting to AD?
> > > I have try to build one myself with no luck. I think my problem is
with
> > > adodb.command calls.
> > >
> > > Thanks for your response.
> > >
> > > "alex23" <wuwei23 at gmail.com> wrote in message
> > > news:1140138661.484502.86380 at f14g2000cwb.googlegroups.com...
> > > > Heya,
> > > >
> > > > There are a couple of examples on the O'Reilly site. These two are
> > > > taken from 'Active Directory Cookbook', the first uses a COM object
> > > > while the second uses a native LDAP module:
> > > >
> > > >
> > >
> >
>
http://www.rallenhome.com/books/adcookbook/src/18.6-rootdse_python_com.py.tx
> > > t
> > > >
> > >
> >
>
http://www.rallenhome.com/books/adcookbook/src/18.6-rootdse_python_ldap.py.t
> > > xt
> > > >
> > > > This might give you a start.
> > > >
> > > > - alex23
> > > >
> > >
> > >
> >
> >
> >
> > ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet
> News==----
> > http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+
> Newsgroups
> > ----= East and West-Coast Server Farms - Total Privacy via Encryption
> =----
>
>



----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----


From jeff at schwabcenter.com  Sat Feb 18 15:04:03 2006
From: jeff at schwabcenter.com (Jeffrey Schwab)
Date: Sat, 18 Feb 2006 20:04:03 GMT
Subject: define loop statement?
In-Reply-To: <lW4Jf.31559$3V4.8390@trnddc06>
References: <lW4Jf.31559$3V4.8390@trnddc06>
Message-ID: <T4LJf.14256$915.10437@southeast.rr.com>

David Isaac wrote:
> I would like to be able to define a loop statement
> (nevermind why) so that I can write something like
> 
> loop 10:
>     do_something
> 
> instead of
> 
> for i in range(10):
>     do_something
> 
> Possible?  If so, how?

Ruby and Smalltalk are both good at this kind of thing, since they have 
syntactic support for associating a block with each method call.  In 
Python, I think you just have to do a little more setup.  How about 
something like this?

class Loop:
	def __init__(self, n):
		self.n = n
	def __call__(self):
		self.n = self.n - 1
		return self.n != 0


if __name__ == '__main__':
	loop = Loop(10)
	while loop:
		print "OK"


From steve at holdenweb.com  Mon Feb  6 20:58:00 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 07 Feb 2006 01:58:00 +0000
Subject: Literal Escaped Octets
In-Reply-To: <pan.2006.02.06.16.57.13.359336@hotmail.com>
References: <pan.2006.02.06.04.50.15.325558@hotmail.com>	<mailman.1495.1139233969.27775.python-list@python.org>
	<pan.2006.02.06.16.57.13.359336@hotmail.com>
Message-ID: <ds8ur9$bbk$1@sea.gmane.org>

Chason Hayes wrote:
> On Mon, 06 Feb 2006 13:39:17 +0000, Steve Holden wrote:
[...]
>>
>>The URL you reference is discussing how you represent arbitrary values 
>>in string literals. If you already have the data in a Python string the 
>>best advise is to use a parameterized query - that way your Python DB 
>>API module will do the escaping for you!
>>
>>regards
>>  Steve
> 
> 
> Thanks for the input. I tried that with a format string and a
> dictionary, but I still received a database error indicating illegal
> string values. This error went away completely when I used a test file
> consisting only of text, but reproduced everytime with a true binary file.
> If you can let me know where I am wrong or show me a code snippet with a
> sql insert that contains a variable with raw binary data that works,
> I would greatly appreciate it.
> 
I tried and my experience was exactly the same, which made me think less 
of PostgreSQL.

They don't seem to implement the SQL BLOB type properly, so it looks as 
though that rebarbative syntax with all the backslashes is necessary. Sorry.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From nir at digitalpeers.com  Tue Feb  7 11:09:20 2006
From: nir at digitalpeers.com (Nir Aides)
Date: Tue, 07 Feb 2006 18:09:20 +0200
Subject: sys.path and unicode folder names
Message-ID: <43e8c2ae$1@news.bezeqint.net>

Hello,

Is there a solution or a work around for the sys.path problem with 
unicode folder names on Windows XP?

I need to be able to import modules from a folder with a non-ascii name.

Thanks,
Nir


From webraviteja at gmail.com  Fri Feb 17 14:29:40 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 17 Feb 2006 11:29:40 -0800
Subject: Another stupid newbie question
In-Reply-To: <dt581r$ql8$1@online.de>
References: <1140203709.145048.314180@g43g2000cwa.googlegroups.com>
	<dt581r$ql8$1@online.de>
Message-ID: <1140204580.054945.147330@z14g2000cwz.googlegroups.com>


Benjamin Niemann wrote:
> Byte wrote:
>
> > How can I make the following code:
> >
> > from random import random
> >
> >
> >
> > def stuff(a, mx):
> >     x = 2
> >     while x == 2:
> >         x = random()
> >         if x == mx: print x
> >         else: print 'No luck,', x
> >         x = 2
> >
> > Stop when x == mx?
>
> What's the intention behind setting x = 2 at all?
>
> def stuff(a, mx):
>     while True:
>         x = random()
>         if x == mx: print x
>         else: print 'No luck,', x
>
> Should do the same as you're code above.
>
> If stuff will never be called with mx=None, I would suggest using
>
> def stuff(a, mx):
>     x = None
>     while x != mx:
>         x = random()
>         if x == mx: print x
>         else: print 'No luck,', x
>
> Also note that random() returns a float and it is *very* unlikely that the
> condition x == mx will ever come true

Right! And as for stopping use 'return' after your print statement to
exit.



From ptmcg at austin.rr.com  Fri Feb 24 16:06:37 2006
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 24 Feb 2006 13:06:37 -0800
Subject: Regular expression fun. Repeated matching of a group Q
References: <1140794885.460929.223080@i39g2000cwa.googlegroups.com>
Message-ID: <1140815196.973042.60710@i39g2000cwa.googlegroups.com>

Here's a (surprise!) pyparsing solution.  -- Paul
(Get pyparsing at http://pyparsing.sourceforge.net.)

data = [
"""<td>04/01/2006</td><td>Wednesday</td><td>&nbsp;</td><td>09:14</td><td>12:44</td><td>12:50</td><td>17:58</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>08:14</td>""",
"""<td>03/01/2006</td><td>Tuesday</td><td>Annual_Holiday</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>08:00</td>"""
]

from pyparsing import *

startTD,endTD = makeHTMLTags("TD")
startTD = startTD.suppress()
endTD = endTD.suppress()
dayOfWeek = oneOf("Sunday Monday Tuesday Wednesday Thursday Friday
Saturday")
nbsp = Literal("&nbsp;")
time = Combine(Word(nums,exact=2) + ":" + Word(nums,exact=2))
date = Combine(Word(nums,exact=2) + "/" + Word(nums,exact=2) + "/" +
Word(nums,exact=4))

entry = ( startTD + date.setResultsName("date") + endTD +
          startTD + dayOfWeek.setResultsName("dayOfWeek") + endTD +
          startTD + ( Suppress(nbsp) |
Word(alphanums+"_").setResultsName("name") ) + endTD +
          OneOrMore(startTD + (Suppress(nbsp) | time) + endTD
).setResultsName("dates")
          )

for d in data:
    res = entry.parseString(d)
    print res.date
    print res.dayOfWeek
    print res.name
    print res.dates
    print


Returns:

04/01/2006
Wednesday

['09:14', '12:44', '12:50', '17:58', '08:14']

03/01/2006
Tuesday
Annual_Holiday
['08:00']



From tbonejo at gmail.com  Thu Feb 23 07:46:02 2006
From: tbonejo at gmail.com (tbonejo at gmail.com)
Date: 23 Feb 2006 04:46:02 -0800
Subject: Get Root access in Linux?
Message-ID: <1140698762.654497.272490@o13g2000cwo.googlegroups.com>

Does anyone know how to call for the root prompt before launching your
app?
Kinda like synaptic or the superuser file manager does?

Thanks,

Tom



From ivoras at __-fer.hr-__  Fri Feb  3 17:24:27 2006
From: ivoras at __-fer.hr-__ (Ivan Voras)
Date: Fri, 03 Feb 2006 23:24:27 +0100
Subject: would it be feasable to write python DJing software
In-Reply-To: <mailman.1395.1138997706.27775.python-list@python.org>
References: <1138925819.465108.181760@o13g2000cwo.googlegroups.com>	<druc1r$cre$1@bagan.srce.hr>	<1138962918.427815.70300@g14g2000cwa.googlegroups.com>	<drvdq6$gjq$1@bagan.srce.hr>
	<11u6t3qc13jplad@corp.supernews.com>	<ds09ej$qbq$1@bagan.srce.hr>
	<mailman.1395.1138997706.27775.python-list@python.org>
Message-ID: <ds0l6q$nc4$1@bagan.srce.hr>

Terry Hancock wrote:

> To me, "doing it in C" implies that I must write some C
> code.

Ok, perhaps it is a bit imprecise :)

> In this case, that won't be required at all. Everything the
> OP wants to do can be done exclusively by writing Python
> code.  He will, of course, be *using*  some extension
> libraries which might in turn have been written in C (or
> Fortran, assembly language, or ADA for that matter -- but
> practically speaking, C).
> 
> This will be true whether he uses PyMedia, PyGame, Numeric
> or all three.

This, of course, is what I am talking about. Python is a great glue 
language, but not exactly suitable for lots of bit twiddling or DSP by 
itself (itself=only with modules from the standard distribution) :)



From sbassi at gmail.com  Thu Feb 23 10:32:35 2006
From: sbassi at gmail.com (Sebastian Bassi)
Date: Thu, 23 Feb 2006 12:32:35 -0300
Subject: Detec nonascii in a string
Message-ID: <b43bf2080602230732o11cacae7od8139187afe852eb@mail.gmail.com>

Hello,

How do I detect non-ascii letters in a string?
I want to detect the condition that a string have a letter that is not
here: string.ascii_letters

Best regards,
SB.

--
Bioinformatics news: http://www.bioinformatica.info
Lriser: http://www.linspire.com/lraiser_success.php?serial=318


From xavier.morel at masklinn.net  Fri Feb  3 12:31:46 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Fri, 03 Feb 2006 18:31:46 +0100
Subject: Python on Windows
In-Reply-To: <mailman.1389.1138987315.27775.python-list@python.org>
References: <mailman.1389.1138987315.27775.python-list@python.org>
Message-ID: <ds03qo$isv$1@apollon.grec.isp.9tel.net>

Simon Faulkner wrote:
> I've just written my first (simple) WxPython program - yaaaay!
> 
> What would folks suggest is the easiest way to package it to run on 
> other windows PCs?
> 
> I would love a single .exe file that would run without ANY OTHER FILES 
> even if it was 50 Mb!
> 
> TIA
> 
> 
> Simon

Py2Exe


From claudio.grondi at freenet.de  Wed Feb  1 18:07:37 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Thu, 02 Feb 2006 00:07:37 +0100
Subject: OO conventions
In-Reply-To: <mailman.1334.1138833641.27775.python-list@python.org>
References: <mailman.1334.1138833641.27775.python-list@python.org>
Message-ID: <43E13F39.2070709@freenet.de>

Daniel Nogradi wrote:
> I'm relatively new to object oriented programming, so get confused
> about its usage once in a while. Suppose there is a class Image that
> has a number of methods, rotate, open, verify, read, close, etc. Then
> to use this class my natural guess would be to have something like
> 
> image = Image( )
> image.read( "myfile.jpg" )
> image.rotate( )
> image.close( )
> 
> But now it turns out that the PIL module uses this as
> 
> image = Image.open( "myfile.jpg" )
> image.verify( )
> image.rotate( )
> image.close( )
> 
> Perhaps the real Image class of PIL doesn't have these methods
> exactly, but doesn't matter, my point is the way it works. Is it
> normal that instead of first creating an instance of a class, it
> starts right away with one its methods? I of course understand that
> the PIL people simply made a choice that their module works this way,
> period, but I'm just wondering if it wouldn't have been more "logical"
> to do it along the way of my first example.
> 
> I guess it's just a matter of convention or how the programmer feels
> like, but there are no conventions of this type? Which would be more
> pythonic? Or I shouldn't worry and it's totally up to the developer?
It's probably more up to the context than to the developer.

I can imagine, that the reason for not using
   image = Image()
is, that 'image' would be in a bad defined state suggesting to be an 
Image(), but after image = Image() it were actually not (yet) an image.

It makes sense to me, to have an actual image object with some pixel 
width and height and some color scheme and not only undefined empty 
container for an image. In another context the approach you describe is 
maybe more appropriate, but in case of an Image() object I can't see any 
advantage.

I don't know if there exist any conventions for how to handle such 
matters. For me Pythonic means it should be as I expect it intuitively. 
And my intuition tells me, that I need to define what image I want, when 
I create an Image object.

Maybe it would even be more appropriate to pass the definition of the 
image to the Image class using Image(fileObject) or Image(fileNameSpec) 
or Image(imageFormatAndSizeSpec), but I can imagine, that using 
different methods instead of detection of the type of parameter passed 
is probably less error prone making a good reason supporting the 
approach of using Image.open("bride.jpg") or Image.new(mode, size) for 
creation of an Image object when it is defined in different ways.

As the .new() and .open() methods are anyway there in order to be 
available for further image operations, why not using them directly in 
the process of creating Image() objects?

Claudio


From cretin at des.alpes.ch  Sat Feb 11 09:37:11 2006
From: cretin at des.alpes.ch (morris carre)
Date: Sat, 11 Feb 2006 15:37:11 +0100
Subject: encoding problems with pymssql / win
Message-ID: <43edf3e5$1_3@news.bluewin.ch>


I have a strange problem : some code that fetches queries from an mssql 
database works fine under Idle but the very same code run from a shell 
window obtains its strings garbled as if the encoding codepage was 
modified. This occurs only when using pymssql to connect; if I connect 
through odbc (using the odbc module included in pywin) this problem 
vanishes.

I briefly thought sys.getdefaultencoding() would pin it down but the 
value is "ascii" in all cases.

If anyone has a lead as to what may be happening here or how to solve it 
(apart from using odbc, that is), advice is welcome.

I am using python 2.4.2 and pymssql 0.7.3 under win2k sp4 on the client 
machine, while the server machine has windows server 2003 + sqlserver2k, 
locale is fr_CH. For an example of garbling, I get '\x8a' where I should 
get '\xe8'

TIA, mc
--
(to email use "boris at batiment71 dot ch")


From neuzhoundxx at yahoo.com  Fri Feb 10 18:53:12 2006
From: neuzhoundxx at yahoo.com (john peter)
Date: Fri, 10 Feb 2006 15:53:12 -0800 (PST)
Subject: read-only attributes
In-Reply-To: <43ec4692$0$1712$636a55ce@news.free.fr>
Message-ID: <20060210235312.52157.qmail@web36710.mail.mud.yahoo.com>

Thank you for the suggestion!

bruno at modulix <onurb at xiludom.gro> wrote:  limodou wrote:
> On 2/10/06, john peter  wrote:
(snip)

>> what do i have to do if i want my application code to have
>>read-only
>> attributes?
>>
> I think you may consider property() built-in function:
> 
> property( [fget[, fset[, fdel[, doc]]]])
> 
> Return a property attribute for new-style classes (classes that derive
> from object).
> fget is a function

s/function/callable/

> for getting an attribute value, likewise fset is a
> function for setting, and fdel a function for del'ing, an attribute.
> Typical use is to define a managed attribute x:
> 
> 
> class C(object):
>     def __init__(self): self.__x = None
>     def getx(self): return self.__x
>     def setx(self, value): self.__x = value
>     def delx(self): del self.__x
>     x = property(getx, setx, delx, "I'm the 'x' property.")

Note that you don't need to define all three accessors. For a
'read-only' attribute, just define the getter:

class ReadOnly(object):
   def __init__(self, x):
      self._x = x
   x = property(fget=lambda self: self._x)

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"
-- 
http://mail.python.org/mailman/listinfo/python-list



		
---------------------------------
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From andre.roberge at gmail.com  Sun Feb 12 20:27:56 2006
From: andre.roberge at gmail.com (=?iso-8859-1?B?QW5kcuk=?=)
Date: 12 Feb 2006 17:27:56 -0800
Subject: Python equivilant to msgbox()
References: <7CQHf.2690$7C3.1780@trnddc08><43efd40a$1_2@newspeer2.tds.net>
Message-ID: <1139794076.321041.320480@g43g2000cwa.googlegroups.com>

Kent Johnson wrote:
> LittlePython wrote:
> > Is there an equivalent to a msgbox() or wscript.echo (via wcsript) . I
> > would like to call this instead of print (to the screen) . I would like
> > to write a simple script that is not an event drive gui but calls input
> > boxes, message boxes, or maybe even a file open browser box as well?
>
> Take a look at EasyGUI:
> http://www.ferg.org/easygui/
>
> Kent
It's also possible to something like that with wxPython.  Try:
import wx
app = wx.PySimpleApp()
dlg = wx.TextEntryDialog(None, 'Enter value', 'Title', '')
if dlg.ShowModal() == wx.ID_OK:
    val = dlg.GetValue()  # this line should be indented
dlg.Destroy()
print "you have entered %s" % val



From deets at nospam.web.de  Thu Feb 23 09:23:15 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 23 Feb 2006 15:23:15 +0100
Subject: make a class instance from a string ?
References: <mailman.1955.1140018042.27775.python-announce-list@python.org>
	<mailman.2340.1140687820.27775.python-list@python.org>
	<1140700945.689245.210160@z14g2000cwz.googlegroups.com>
Message-ID: <465uudF9h4mqU1@uni-berlin.de>

Luke Plant wrote:

> Bo Yang wrote:
> 
>> I know in java , we can use
>>
>> class.ForName("classname")
>>
>>
>> to get an instance of the class 'classname' from a
>> string , in python , how do I do that ?
> 
> In Python, classes are first class objects, so normally you would pass
> the class itself around, rather than use the names of classes.  Of
> course that might not be practical or applicable in your situation.

While JAVA is severely limited regarding the number of seats in the first
class, classes _are_ sitting there.

The need for dynamic attribute look up is even more frequent in python -
think getattr, __getitem__, __getattr__.

Diez


From steven.bethard at gmail.com  Sun Feb 26 12:00:37 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 26 Feb 2006 10:00:37 -0700
Subject: sort one list using the values from another list
In-Reply-To: <mailman.2447.1140969980.27775.python-list@python.org>
References: <mailman.2447.1140969980.27775.python-list@python.org>
Message-ID: <Bb-dncKoOeYvQ5zZRVn-uw@comcast.com>

Brian Blais wrote:
> Hello,
> 
> I have two lists, one with strings (filenames, actually), and one with a 
> real-number
> rank, like:
> 
> A=['hello','there','this','that']
> B=[3,4,2,5]
> 
> I'd like to sort list A using the values from B, so the result would be 
> in this example,
> 
> A=['this','hello','there','that']

Here's a solution that makes use of the key= argument to sorted():

 >>> A = ['hello','there','this','that']
 >>> B = [3,4,2,5]
 >>> indices = range(len(A))
 >>> indices.sort(key=B.__getitem__)
 >>> [A[i] for i in indices]
['this', 'hello', 'there', 'that']

Basically, it sorts the indices to A -- [0, 1, 2, 3] -- in the order 
given by B, and then selects the items from A in the appropriate order.



From johnjsal at NOSPAMgmail.com  Wed Feb 15 09:52:49 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 15 Feb 2006 14:52:49 GMT
Subject: how to write a C-style for loop?
In-Reply-To: <8oo5v11ssquc1ota7j8ualtv9ugdgrn5ql@4ax.com>
References: <gZednVPdAtumI2_eRVn-jw@rcn.net>
	<8oo5v11ssquc1ota7j8ualtv9ugdgrn5ql@4ax.com>
Message-ID: <5fHIf.1622$No6.38003@news.tufts.edu>

Tim Roberts wrote:
> John Salerno <johnjsal at NOSPAMgmail.com> wrote:
>> I assume this is the way for loops are written in C, but if it helps to 
>> be specific, I'm referring to C# for loops. The Python for loop seems to 
>> be the same (or similar) to C#'s foreach loop:
>>
>> foreach int i in X
>>
>> But how would you write a C# for loop in Python? Do you rework a while 
>> loop, or use the range() function?
>>
>> Here's an example:
>>
>> for (int i = 0; i < 50; i += 5)
>>
>> How would that go in Python, in the simplest and most efficient way?
> 
>   for i in range(0,50,5):
>       print i

Thanks guys. I thought it might be something like this. In fact, the 
chapter I just read dicussed how you use the range function with a for 
loop, but I didn't quite see a connection with the C# for loop.


From samschul at pacbell.net  Wed Feb 22 12:57:15 2006
From: samschul at pacbell.net (sam)
Date: 22 Feb 2006 09:57:15 -0800
Subject: Pyserial never read
In-Reply-To: <11vp8gaja4tonf4@corp.supernews.com>
References: <1140105936.408387.88130@z14g2000cwz.googlegroups.com>
	<1140219414.143448.234450@z14g2000cwz.googlegroups.com>
	<1140302110.028540.176210@g43g2000cwa.googlegroups.com>
	<slrndvm0sr.6k1.nick@irishsea.home.craig-wood.com>
	<mailman.2241.1140536285.27775.python-list@python.org>
	<slrndvn1ad.he1.nick@irishsea.home.craig-wood.com>
	<1140599901.082142.262540@f14g2000cwb.googlegroups.com>
	<1140629809.822833.33230@o13g2000cwo.googlegroups.com>
	<11vp8gaja4tonf4@corp.supernews.com>
Message-ID: <1140631035.309378.208710@g47g2000cwa.googlegroups.com>

Thanks for the info Grant. It'll teach me not to read the documentation
:>) 

Sam



From deets at nospam.web.de  Wed Feb  8 08:24:38 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 08 Feb 2006 14:24:38 +0100
Subject: Python threading, and processes
References: <pan.2006.02.08.13.18.20.728051@digital-crocus.com>
Message-ID: <44u9pgF41dv5U1@uni-berlin.de>

Robin Haswell wrote:

> Hey there
> 
> I'm doing some threading in python with Python 2.3 and 2.4 on Ubuntu and
> Debian machines, and I've noticed that if I open a lot of threads (say,
> 50), I get lots of python processes with individual PIDs, which consume a
> disproportionate amount of CPU. Does this mean that Python is using the
> dummy_thread module by accident? And is there a realistic limitation to
> the number of threads I can do?

Both system-depend. The way threads are shwon depends on the systenm. And a
thread that runs, runs  - so it consumes cpu-cycles. Try calling
time.sleep() to see how the consumption decreases.

And the limitation of allowed threads per process and/or system is also a
OS-dependend thing. 

"""
Under Linux, threads are counted as processes, so any limits to the number
of processes also applies to threads. In a heavily threaded app like a
threaded TCP engine, or a java server, you can quickly run out of threads.
"""

from

http://people.redhat.com/alikins/system_tuning.html#threads


Diez


From nick at craig-wood.com  Tue Feb 21 07:30:04 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 21 Feb 2006 06:30:04 -0600
Subject: changing value of 'self' when subclassing int
References: <mailman.2170.1140453870.27775.python-list@python.org>
Message-ID: <slrndvlvmd.6k1.nick@irishsea.home.craig-wood.com>

David Coffin <dcoffin at gmail.com> wrote:
>  I'd like to subclass int to support list access, treating the integer  
>  as if it were a list of bits.
>  Assigning bits to particular indices involves changing the value of  
>  the integer itself, but changing 'self' obviously just alters the  
>  value of that local variable.
>  Is there some way for me to change the value of the BitSequence  
>  object itself? I've also tried wrapping and delegating using  
>  __getattr__, but I couldn't figure out how to handle in-place
>  methods.

Here was my take on the problem when it came up for me.  Note the
FIXMEs ;-) My first attempt was to subclass long which was a dismal
failure.

class bits:
    """
    Space efficient bit storage.  It returns something which acts
    like an infinitely long array.  The array is initialised to all 0s

    FIXME need to implement lots more methods!
    FIXME check for -ve indices etc!
    FIXME can do boolean methods by arithmetic on longs
    FIXME can't subclass long as long is immutable :-(
    """
    def __init__(self, initial = None):
        "Initialise with the initial state of the array or nothing for it to be set to all 0s"
        self.i = 0L
        if initial:
            for i in initial:
                self.i <<= 1
                self.i |= i
    def mask(self, n):
        return 1L << n
    def __getitem__(self, n):
        return (self.i & self.mask(n)) != 0L
    def __setitem__(self, n, v):
        m = self.mask(n)
        if v:
            self.i |= m
        elif self.i & m:
            self.i ^= m
    # FIXME implement len() and use it in __repr__ to output directly!
    def __repr__(self):
        # FIXME is there a way to convert a long to binary?
        content = ""
        if self.i:
            L = []
            i = self.i
            while i:
                L.append(int(i & 1L))
                i >>= 1
            L.reverse()
            content = str(L)
        return "%s(%s)" % (self.__class__.__name__, content)

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From sean at buildingonline.com  Fri Feb  3 13:54:20 2006
From: sean at buildingonline.com (Sean Berry)
Date: Fri, 3 Feb 2006 10:54:20 -0800
Subject: MySQLdb question... using table name as arg
References: <%cNEf.19800$sA3.14913@fed1read02>
	<mailman.1392.1138992081.27775.python-list@python.org>
Message-ID: <nFNEf.19803$sA3.3636@fed1read02>


"Carsten Haese" <carsten at uniqsys.com> wrote in message 
news:mailman.1392.1138992081.27775.python-list at python.org...
> On Fri, 2006-02-03 at 13:24, Sean Berry wrote:
>> I have four tables that all have the same column names (50 in each.)
>>
>> I have created an admin program to edit, delete and add records to the
>> tables and would like to use the table name as a variable in each query 
>> so
>> the code can be used for each of the 4 tables.  Usually I would do 
>> something
>> like this by having 1 table with special column to categorize the records 
>> as
>> I am doing with each table, but this specific application requires that I 
>> do
>> it with 4 tables instead.
>>
>> To ensure that string are quoted properly without any hassle I use the
>> execute function like so assuming c is my cursor object...
>>
>> c.execute("update tableName set col1 = %s, col2 = %s, col3 = %s, ...",
>> (val1, val2, val3, ...))
>>
>> But, not I want to do this with a variable tableName.  If I add it to the
>> tuple of parameters in the second arg before val1 and replace tableName 
>> with
>> %s, then the tableName will be quoted in the query, causing an error.
>>
>> What is the best (easiest) way for me to accomplish this?  I know it may 
>> be
>> a stupid question but I just can't figure it out.
>
> As you have discovered, the table name is not allowed to be a parameter.
> You have to build the query string for the appropriate table, then hand
> it to execute for filling in the actual parameters:
>
> queryString = "update "+tableName+" set col1=%s, col2=%s,..."
> c.execute(queryString, (val1, val2,...))
>
> HTH,

Thanks... that is kind of what I figured.






From hancock at anansispaceworks.com  Tue Feb 28 16:54:38 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Tue, 28 Feb 2006 15:54:38 -0600
Subject: PEP 354: Enumerations in Python
In-Reply-To: <1141149527.078533.98600@i40g2000cwc.googlegroups.com>
References: <87accdplbj.fsf@rose.polar.local>
	<1141149527.078533.98600@i40g2000cwc.googlegroups.com>
Message-ID: <20060228155438.3628edf6@samwise.anansi>

On 28 Feb 2006 09:58:47 -0800
"sjdevnull at yahoo.com" <sjdevnull at yahoo.com> wrote:
> Add me to the "me, too!" list of people who think
> enumerations would be better off without > or <
> comparison.

+1 on "unordered"

Comparable enums do have use-cases (like the days of the
week), but I can't think of many of them. Also, there is
the point that even the days of the week is not a great
use of the ordering since it varies between locales, as
I think was pointed out in this thread.

The most compelling reason to have some kind of ordering is
just so you can iterate over them -- but dicts are
iterable without being ordered, so I see no reason
why enums couldn't be.

In C, enums are a rather shallow mask pulled over integers,
and as is common practice in C, the mask is routinely
ignored or removed.  I think that enums in Python, if added,
should be "strong enums" without this kind of ambiguous
behavior.

I also think though that the characterization of the
behavior of enumerated value instances is much more
important than the behavior of the enumeration collection
object, which is basically just a set, anyway.

Cheers,
Terry

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From adelagon at gmail.com  Mon Feb 20 11:49:59 2006
From: adelagon at gmail.com (Alvin A. Delagon)
Date: Mon, 20 Feb 2006 16:49:59 +0000
Subject: Is inifinite loop not a good practice?
Message-ID: <43F9F337.10706@gmail.com>

Thanks for the quick heads up! The comparison between implementing an 
infinite loop and cron is great. I'm beginning to see cron as the better 
solution between the two specially during crash instances. I'll try to 
code the script using the two solutions and do some stress testing to 
determine which is better between those two.


From mike.klaas at gmail.com  Wed Feb 22 23:49:53 2006
From: mike.klaas at gmail.com (Klaas)
Date: 22 Feb 2006 20:49:53 -0800
Subject: bsddb3 database file, what are the __db.001, __db.002,
	__db.003 files for?
In-Reply-To: <dtj9gc$b33$1@newsreader3.netcologne.de>
References: <dtj9gc$b33$1@newsreader3.netcologne.de>
Message-ID: <1140670193.599122.325800@z34g2000cwc.googlegroups.com>


Claudio Grondi wrote:

> Beside the intended database file
>    databaseFile.bdb
> I see in same directory also the
>    __db.001
>    __db.002
>    __db.003
> files where
>    __db.003 is ten times as larger as the databaseFile.bdb
> and
>    __db.001 has the same size as the databaseFile.bdb .

I can't tell you exactly what each is, but they are the files that the
shared environment (DBEnv) uses to coordinate multi-process access to
the database.  In particular, the big one is likely the mmap'd cache
(which defaults to 5Mb, I believe).

You can safely delete them, but probably shouldn't while your program
is executing.

> Is there any _good_ documentation of the bsddb3 module around beside
> this provided with this module itself, where it is not necessary e.g. to
> guess, that C integer value of zero (0) is represented in Python by the
> value None returned in case of success by db.open() ?

This is the only documentation available, AFAIK:
http://pybsddb.sourceforge.net/bsddb3.html

For most of the important stuff it is necessary to dig into the bdb
docs themselves.

-Mike



From fidlee at gmail.com  Thu Feb 23 13:28:19 2006
From: fidlee at gmail.com (fidlee)
Date: 23 Feb 2006 10:28:19 -0800
Subject: need help regarding compilation
In-Reply-To: <43fdf77e$1_3@newspeer2.tds.net>
References: <1140714583.014871.194640@p10g2000cwp.googlegroups.com>
	<46694pF9ms9bU1@uni-berlin.de>
	<1140717481.804798.195070@z14g2000cwz.googlegroups.com>
	<43fdf77e$1_3@newspeer2.tds.net>
Message-ID: <1140719299.814243.108000@z34g2000cwc.googlegroups.com>


Kent Johnson wrote:
> fidlee wrote:
> >>Try this:
> >>
> >>def fac(x):
> >> if x<=1:return 1
> >> return x*fac(x-1)
> >
> >
> > I am still getting an error in compilation. Would be really thankful if
> > someone could tell me as to what is going wrong.
>
> Try running the compiler under Java 1.4, or just run the class in the
> jython interpreter without compiling it first. For simple examples like
> this you don't need to compile, just run it with
>    jython factor.py
>
> Kent

Thanks. i noticed that it runs. But why is it throwing a compilation
error in my case here?



From joyh at techni-tool.com  Thu Feb  9 11:55:25 2006
From: joyh at techni-tool.com (Hunsberger, Joy)
Date: Thu, 9 Feb 2006 11:55:25 -0500
Subject: newbie needs serious help
Message-ID: <8BE025E130DD4544918A767F414D260F02C80767@ttmail01.techni-tool.com>

OK. Never used python. I need it to install the Google Sitemap program
on our WindowsServer2003(SE) server. 
I cannot for the life of me figure out how to configure this thing.
Please keep in mind that I do not know ANYTHING about servers. 


What I did:
I downloaded the Python 2.4.2 msi file, and installed it. 
All went well. Now, I have no idea what to do.
I read the documentation, README files, etc., and it looks like I'm
supposed to configure it with a ./configure command,and then a magical
make command.
Where do I type these in? I'm assuming it's not through a command line,
as that didn't work.
And I tried to launch the python.exe, and type it in there but that
doesn't work either. 
Where is this is supposed to go?
Help?
  
 
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From sullivanz.pku at gmail.com  Tue Feb 21 00:23:23 2006
From: sullivanz.pku at gmail.com (Sullivan WxPyQtKinter)
Date: 20 Feb 2006 21:23:23 -0800
Subject: Any Tkinker based rich text widget?
In-Reply-To: <mailman.2125.1140360353.27775.python-list@python.org>
References: <1140329900.341774.175600@f14g2000cwb.googlegroups.com>
	<mailman.2125.1140360353.27775.python-list@python.org>
Message-ID: <1140499403.546412.303110@g44g2000cwa.googlegroups.com>

Thank you so much for help. It is my honor to get a reply from a
prestigious figure like you.



From bdesth.quelquechose at free.quelquepart.fr  Sun Feb 19 17:18:28 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 19 Feb 2006 23:18:28 +0100
Subject: Python vs. Lisp -- please explain
In-Reply-To: <yfsmzgnp2ub.fsf@oc.ex.ac.uk>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
Message-ID: <43f8cb3f$0$4225$626a54ce@news.free.fr>

Alexander Schmolck a ?crit :
> Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> writes:
> 
> 
>>DH a ?crit :
>>(snip)
>>
>>>It is by design. Python is dynamically typed. It is essentially an
>>>interpreted scripting language like javascript or ruby or perl,
>>
>>
>>It's not a "scripting" language, and it's not interpreted.
> 
> 
> Of course it is. What do you think happens to the bytecode?

Ok, then what do you think happens to 'machine' code ?

"interpreted" usually means "no compilation, all parsing etc redone at 
each execution", which is not the case with a bytecode/vm based 
implementation.

> And if python
> isn't a scripting language, then what on earth is? 

bash is a scripting language for *n*x systems. javascript is a scripting 
language for web browsers. VBScript is a scripting language for  MS 
applications.

> You might want to argue about whether scriping language is a meaningful and
> useful concept,

A scripting languagee is a language whose main purpose is to be embbeded 
in an application to provide the user a way of programmaticaly automate 
some tedious tasks.

Now you could of course argue about what is an application...

> but it's really hard to see how you could talk about "scripting
> languages" without including python.

Ho, really ? How many applications using Python as scripting language ? 
And how many applications written in Python ?

Python *can* be used as a scripting language (and is not too bad at it), 
but it *is* not a scripting language.


From claird at lairds.us  Fri Feb 24 15:08:02 2006
From: claird at lairds.us (Cameron Laird)
Date: Fri, 24 Feb 2006 20:08:02 GMT
Subject: What are COM-enabled applications?
References: <1140580133.293283.322870@f14g2000cwb.googlegroups.com>
	<gq8uc3-iah.ln1@lairds.us> <Xns9772C3EDC53E2duncanbooth@127.0.0.1>
Message-ID: <c744d3-3be.ln1@lairds.us>

In article <Xns9772C3EDC53E2duncanbooth at 127.0.0.1>,
Duncan Booth  <duncan.booth at suttoncourtenay.org.uk> wrote:
>Cameron Laird wrote:
>
>> Python has good COM abilities.  While, to my surprise, I just
>> realized that I'm unaware of anyone having put together a COM
>> "explorer" with Python, it would be a straightforward project.
>
>Don't the tools that come with Python's COM support do enough for you?
>
>...\lib\site-packages\win32com\client\combrowse.py for example. (Or inside 
>PythonWin it is on the Tools menu).

I was quibbling about the difference between a polished application
and a toolkit; please, I don't want anyone to think that I AT ALL
disparage the achievement of win32.  

Another recommendation for the original poster:  <URL:
http://www.python.org/windows/win32com/QuickStartClientCom.html >.


From atanasy at gmail.com  Wed Feb 15 10:18:37 2006
From: atanasy at gmail.com (atanas Cosmas Nkelame)
Date: Wed, 15 Feb 2006 18:18:37 +0300
Subject: Encryption application/NEED A HACKER TO TRY IT
Message-ID: <cda778180602150718o325826a6ga658b31339aa82d4@mail.gmail.com>

Hi guys,
There was an instence in our office whereby someone happened to get his eyes
on information he is not supposed to.

I got an idea to write a python application which ciphers and enciphers
informationation (converting it to a format which only the person who
changed it understands as he is the only one who has the program to decode
the information).

The program will allways have to be pysicaly separated from the machine
where data is kept.

I'm putting here the 'encoded' text for someone to try to encipher the text
or tell me what is the chance that one can encipher the text.


Here we go..

.>. 3;0.$0.8:;07&:00: 07&.>..&;.$> 9::.$0. .&;..9>.;.$0.3;0 ;...$0.3;0
9::.$0. 3;014>.>.9::$> .;>..$0..$0.:00: >6..12>9::;...$0..9>.;
:->.$0.:00:$>.

:-><.>.9>.; ;>.$0..9$$>.$0..9>.;$> ;..$>07&>6.


Regards, Atanas Cosmas Nkelame
Dar es Salaam-Tanzania-East Africa
**
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From hancock at anansispaceworks.com  Tue Feb 21 19:46:11 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Tue, 21 Feb 2006 18:46:11 -0600
Subject: deriving from float or int
In-Reply-To: <dtfv32$u92$1@sea.gmane.org>
References: <1140502954.660120.174160@g14g2000cwa.googlegroups.com>
	<slrndvlfts.9se.sybrenUSE@schuimige.unrealtower.org>
	<1140555253.262485.214100@z14g2000cwz.googlegroups.com>
	<dtfv32$u92$1@sea.gmane.org>
Message-ID: <20060221184611.5ea4e12a@samwise.anansi>

On Tue, 21 Feb 2006 15:01:22 -0600
Robert Kern <robert.kern at gmail.com> wrote:
> http://www.python.org/2.2.3/descrintro.html#__new__

Curiously, __new__ does not appear in the index of
the Python 2.3 language reference!

It is fixed in Python 2.4, though -- I just checked.

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From paulgeeleher at gmail.com  Sun Feb  5 15:37:53 2006
From: paulgeeleher at gmail.com (sophie_newbie)
Date: 5 Feb 2006 12:37:53 -0800
Subject: Strange behavior with os call in cgi script
Message-ID: <1139171873.431432.195080@f14g2000cwb.googlegroups.com>

I have written a cgi script that seems to run perfectly from the
command line when I simulate some cgi input using
os.environ['QUERY_STRING'].

The thing is that when I run it from the browser, one of my os.system
calls, which gets excecuted fine when running the program in the
interpreter, doesn't seem to get excecuted, or gets excecuted but does
nothing.

Does anyone know whats going on or how I could debug this problem?

It is worth noting that other os.system calls in the script get
excecuted fine.



From finite.automaton at gmail.com  Fri Feb 10 16:04:03 2006
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 10 Feb 2006 13:04:03 -0800
Subject: appending to a list via properties
Message-ID: <1139605443.823899.141260@g47g2000cwa.googlegroups.com>

Here's a curious hack I want to put up for discussion.  I'm thinking of
writing a PEP for it.

Observation
-----------------
I found myself using this construct for assembling multiple lists:

    foo = []
    qux = []

    while some_condition:
       a, b = calculate_something()
       foo.append(a)
       qux.append(b)

Not elegant!  It requires temporary variables a and b, which are only
used to populate the lists.


Suggestion
----------------

    class better_list (list):
        tail = property(None, list.append)

    foo = better_list()
    qux = better_list()

    while some_condition:
        foo.tail, qux.tail = calculate_something()

Granted, the name tail might not be the best, but you get the idea.


Alternatives
------------------

    1. Use "append" instead, preserving original list.append behavior.

        class better_list (list):
            append = property(lambda l: lambda x: list.append(l,x),
list.append)

    2. Use an external wrapper, similar to operator.*getter

        class propertize (object):
            def __init__(self, target):
                self.__target__ = target
            def __setattr__(self, attribute, value):
                if attribute.startswith('_'): return
object.__setattr__(self, attribute, value)
                else: getattr(self.__target__, attribute)(value)

        propertize(foo).append, propertize(qux).append =
calculate_something()

   
Well?



From sjdevnull at yahoo.com  Mon Feb 13 03:19:24 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 13 Feb 2006 00:19:24 -0800
Subject: how do you pronounce 'tuple'?
In-Reply-To: <vuednQcT5sUEn23eRVn-iA@rcn.net>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
Message-ID: <1139818764.358733.225300@z14g2000cwz.googlegroups.com>

John Salerno wrote:
> I know it comes from the suffix -tuple, which makes me think it's
> pronounced as 'toople', but I've seen (at m-w.com) that the first
> pronunciation option is 'tuhple'

I went to university in Pittsburgh and work in Washington, DC.  I've
only ever heard it as toople.

If I heard someone say tuhple, I'd probably thing of Iago's words to
Desdemona's father along the lines of "that ram is tupping your ewe".
But I'm easily amused by alternate pronunciations.



From lists at fabis-site.net  Mon Feb 27 17:11:08 2006
From: lists at fabis-site.net (Fabian Steiner)
Date: Mon, 27 Feb 2006 23:11:08 +0100
Subject: PyQT: QDialog and QMainWindow interacting with each other
Message-ID: <dtvtds$mt8$03$1@news.t-online.com>

Hello!

I have got a QMainWindow with a QListView, in which the different 
entries of a database are shown to the user. Moreover it has got a 
QPushButton, so that another QDialog can be opened where the user is 
able to add a new entry:

...

self.connect(self.btnNew, SIGNAL('clicked()'), self.openNewDialog)
...

def openNewDialog(self):
    dialog = MyDialog(self)
    dialog.show()
    self.showListViewItems() # this line isn't recognized


MyDialog is closed by calling MyDialog.accept(). What can I do so that 
self.showListViewItems() is called after MyDialog has been closed?

Thank you for any input!

Cheers,
Fabian Steiner


From sudharsh at gmail.com  Tue Feb 21 11:05:26 2006
From: sudharsh at gmail.com (sudharsh at gmail.com)
Date: 21 Feb 2006 08:05:26 -0800
Subject: Video Capture modules in linux
In-Reply-To: <mailman.2244.1140537067.27775.python-list@python.org>
References: <1140536025.234765.309040@z14g2000cwz.googlegroups.com>
	<mailman.2244.1140537067.27775.python-list@python.org>
Message-ID: <1140537926.084128.66160@g44g2000cwa.googlegroups.com>

well wht can i say it simply refuses to compile...i m getting make
errors. i think the culprit is the gcc-4.0..secondly i havent had a
chance to really try it out..aneways does libfg manipulate inputs from
webcams..like VideoCapture modules ..also i think libfg is mainly for C
although a module for python exists..forgive me i m a real newbie..

regards
Sudharshan S



From girodt at gmail.com  Tue Feb  7 09:17:33 2006
From: girodt at gmail.com (Thomas Girod)
Date: 7 Feb 2006 06:17:33 -0800
Subject: variables preceeded with @
Message-ID: <1139321853.827836.279270@g14g2000cwa.googlegroups.com>

Hello there.

I recently started looking at turbogears and I found code such as :

 class Root(controllers.Root):
     @turbogears.expose(html="blog.templates.accueil")
     def index(self,**kw):
         return dict()


What is this "@" ? I looked around but couldn't find any references to
this syntax.

Thomas



From samslists at gmail.com  Tue Feb 21 00:01:18 2006
From: samslists at gmail.com (samslists at gmail.com)
Date: 20 Feb 2006 21:01:18 -0800
Subject: Writing my own typing monitor program for RSI sufferers...
In-Reply-To: <mailman.2203.1140494506.27775.python-list@python.org>
References: <1140491147.433293.164700@g43g2000cwa.googlegroups.com>
	<mailman.2203.1140494506.27775.python-list@python.org>
Message-ID: <1140496915.106258.190830@z14g2000cwz.googlegroups.com>

So, so close....  The problem with this implementation is that it
doesn't monitor usb keyboards under linux at all as far as I can
tell....since no keyboard entry will show up in /proc/interrupts with a
usb keyboard.  I absolutely need the keyboard monitoring as well.

Otherwise, your project would be the perfect starting point for me!

Anyone else have an idea as to what I can use with Python to know when
the keyboard is being used even when I don't have focus?

Thanks
Sam



From peter at engcorp.com  Wed Feb 22 09:02:56 2006
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 22 Feb 2006 09:02:56 -0500
Subject: interpreting the fractional portion of time.clock() vs time.time(0
	measurements
In-Reply-To: <20060221194023.77291.qmail@web36708.mail.mud.yahoo.com>
References: <20060221194023.77291.qmail@web36708.mail.mud.yahoo.com>
Message-ID: <dthque$o7r$1@sea.gmane.org>

john peter wrote:
> let's say i'm taking timing measurements in Windows XP
>  
> t1 = time.clock()
> ...
> t2 = time.clock()
>  
> t3 = t2 - t1 = say, 0.018
> what is the unit of measurement for t3? is it correct to say that t3 = 
> 18 milliseconds?
> microsends?
>  
> what if the timing function used for t1 and t2 was time.time()? is it 
> still correct to say
> that t3 = 18 milliseconds? i kinda know that in Windows, time.clock() 
> has higher
> resolution than time.time(), and all i need is millisecond resolution. 
> which of these
> functions would be easier to translate into millisecond units of 
> measurement?

This looks like a repost of a previous question, to which I already 
posted an answer.



From __peter__ at web.de  Wed Feb  8 12:43:24 2006
From: __peter__ at web.de (Peter Otten)
Date: Wed, 08 Feb 2006 18:43:24 +0100
Subject: breadth first search
References: <43ea2271$1@127.0.0.1> <43EA2474.7010109@plope.com>
	<dsd950$62f$02$1@news.t-online.com> <K_pGf.280$6G.172@dukeread03>
Message-ID: <dsdah1$9ac$02$1@news.t-online.com>

Chris McDonough wrote:

> I?didn't?mean?to?offend?your?sensibilities.

Me neither :-)

Peter


From iansan at gmail.com  Wed Feb  1 19:27:40 2006
From: iansan at gmail.com (IamIan)
Date: 1 Feb 2006 16:27:40 -0800
Subject: Pulling numbers from ASCII filename not working
References: <1138128272.202729.259890@g43g2000cwa.googlegroups.com>
	<43d730c7.184101153@news.oz.net>
	<1138221740.515877.103900@g44g2000cwa.googlegroups.com>
	<43d8ed75.297939884@news.oz.net>
Message-ID: <1138840060.952721.197910@g14g2000cwa.googlegroups.com>

Thanks for the help everyone (especially those that gave more answers
than attitude). It's working perfectly!

Ian



From mark at mark-fink.de  Sat Feb 11 03:36:52 2006
From: mark at mark-fink.de (Mark Fink)
Date: 11 Feb 2006 00:36:52 -0800
Subject: Jython inherit from Java class
In-Reply-To: <dsjm56$cjr$1@reader2.nmix.net>
References: <1139344211.725580.263660@g47g2000cwa.googlegroups.com>
	<43eab05b_2@newspeer2.tds.net>
	<1139594138.216488.12730@g14g2000cwa.googlegroups.com>
	<1139600759.152551.138440@g14g2000cwa.googlegroups.com>
	<43ecee24_2@newspeer2.tds.net> <dsjm56$cjr$1@reader2.nmix.net>
Message-ID: <1139647012.317095.4240@g44g2000cwa.googlegroups.com>

Please enlighten me. This seemed so easy yust inherit from a Java class
overwrite one method - done. At the moment I do not know how to proceed
:-((
Jython or jythonc?
==================
In general is it better to run programms with the jython interpreter or
is it better to compile them first? I had the impression that the
inheritance does not work with the interpreter. Is that right?

2.1 or 2.2a
===========
The programm did not compile with the 2.1 version and Java 1.5. But
with 2.2a it compiled but 2.2a is an alpha version. Assuming the
programm would compile with the Java 1.4 version would it be better
(saver, more stable, performance) to use 2.1 or 2.2a?

Inherit from java baseclass or reimplement the whole thing in jython?
=====================================================================
All the problems with Jython stated when I wanted to inherit from a
Java baseclass. I wounder if I would have more success when
implementing it in pure Jython. Regarding the inheritance I had an
empty wrapper arround the Java baseclass and 70% of the unit test
passed. But the performance was ~ factor 10 slower than using the base
class directly. Does this mean that there is overhead with the
inheritanc construct and that this implementation path would always be
so slow. On the other hand would a 100% Jython solution be faster?

Mark



From python at rcn.com  Fri Feb 10 03:53:23 2006
From: python at rcn.com (Raymond Hettinger)
Date: 10 Feb 2006 00:53:23 -0800
Subject: Question about idioms for clearing a list
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au>
	<ds83kd$98m$1@sea.gmane.org>
	<mailman.1510.1139250471.27775.python-list@python.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>
	<mailman.1546.1139320907.27775.python-list@python.org>
	<dscdtr$ciu$1@wake.carmen.se>
	<mailman.1594.1139403378.27775.python-list@python.org>
	<dsd311$qlp$1@wake.carmen.se>
	<ZatGf.28418$F_3.14242@newssvr29.news.prodigy.net>
	<dsfej3$1i6$1@wake.carmen.se>
	<cQRGf.54501$PL5.14689@newssvr11.news.prodigy.com>
	<1haij56.14jpj06cl31lkN%aleaxit@yahoo.com>
Message-ID: <1139561603.918405.167120@g47g2000cwa.googlegroups.com>

[Alex Martelli]
> I was thinking of something different again, from a use case I did have:
>
> def buncher(sourceit, sentinel, container, adder, clearer):
>     for item in sourceit:
>         if item == sentinel:
>             yield container
>             clearer()
>         else
>             adder(item)
>     yield container
>
> s = set()
> for setbunch in buncher(src, '', s, s.add, s.clear): ...

I'm curious, what is the purpose of emptying and clearing the same
container?   ISTM that the for-loop's setbunch assignment would then be
irrelevant since id(setbunch)==id(s).  IOW, the generator return
mechanism is not being used at all (as the yielded value is constant
and known in advance to be identical to s).

Just for jollies, I experimented with other ways to do the same thing:

    from itertools import chain, groupby

    def buncher(sourceit, sentinel, container, updater, clearer):
        # Variant 1:  use iter() to do sentinel detection and
        # use updater() for fast, high volume updates/extensions
        it = iter(src)
        for item in it:
            updater(chain([item], iter(it.next, sentinel)))
            yield container
            clearer()

    s = set()
    for setbunch in buncher(src, '', s, s.update, s.clear):
        print setbunch, id(setbunch)

    def buncher(sourceit, sentinel, container, updater, clearer):
        # Variant 2:  use groupby() to the bunching and
        # use updater() for fast, high volume updates/extensions
        for k, g in groupby(sourceit, lambda x: x != sentinel):
            if k:
                updater(g)
                yield container
                clearer()

    s = set()
    for setbunch in buncher(src, '', s, s.update, s.clear):
        print setbunch

Of course, if you give-up the seemingly unimportant in-place update
requirement, then all three versions get simpler to implement and call:

    def buncher(sourceit, sentinel, constructor):
        # Variant 3:  return a new collection for each bunch
        for k, g in groupby(sourceit, lambda x: x != sentinel):
            if k:
                yield constructor(g)

    for setbunch in buncher(src, '', set):
        print setbunch

Voila, the API is much simpler; there's no need initially create the
destination container; and there's no need for adaptation functions
because the constructor API's are polymorphic:

    constructor = list
    constructor = set
    constructor = dict.fromkeys



[Alex]
> d = dict()
> for dictbunch in buncher(src, '', d, lambda x: d.setdefault(x,''),
>                                     d.clear): ...
>
> L = list()
> for listbunch in buncher(src, '', L, L.append,
>                             lambda: L.__setslice__(0,len(L),[])): ...

Hmm, is your original buncher a candidate for adapters?  For instance,
could the buncher try to adapt any collection input to support its
required API of generic adds, clears, updates, etc.?



[Alex]
> So what is the rationale for having list SO much harder to use in such a
> way, than either set or collections.deque?

Sounds like a loaded question ;-)

If you're asking why list's don't have a clear() method, the answer is
that they already had two ways to do it (slice assignment and slice
deletion) and Guido must have valued API compactness over collection
polymorphism.  The latter is also evidenced by set.add() vs
list.append() and by the two pop() methods having a different
signatures.

If you're asking why your specific case looked so painful, I suspect
that it only looked hard because the adaptation was force-fit into a
lambda (the del-statement or slice assignment won't work as an
expression).  You would have had similar difficulties embedding
try/except logic or a print-statement.  Guido, would of course
recommend using a plain def-statement:

    L = list()
    def L_clearer(L=L):
        del L[:]
    for listbunch in buncher(src, '', L, L.append, L_clearer):
        print listbunch



While I question why in-place updating was needed in your example, it
did serve as a nice way to show-off various approaches to adapting
non-polymorphic API's for a generic consumer function with specific
needs.

Nice post,


Raymond



From tdelaney at avaya.com  Sun Feb 26 20:22:07 2006
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Mon, 27 Feb 2006 12:22:07 +1100
Subject: sort one list using the values from another list
Message-ID: <2773CAC687FD5F4689F526998C7E4E5F4DB98B@au3010avexu1.global.avaya.com>

Ron Adam wrote:

> Python 2.4.1 (#65, Mar 30 2005, 09:13:57) [MSC v.1310 32 bit (Intel)]
> on win32
> 
> I was a bit surprised by them being sorted.  I just happend to try
> d.keys() in place of s2, and it sped up.  I was expecting it to be a
> bit slower.

Purely an implementation accident - based entirely on the hash values of
the objects you've used (i.e. small integers). As you add more data to
the dictionary, you will definitely reach the point where you no longer
get keys out in sorted order.

Tim Delaney


From Matt  Thu Feb 16 23:18:46 2006
From: Matt (Matt)
Date: Fri, 17 Feb 2006 04:18:46 GMT
Subject: Mac OS X Installation Problem
Message-ID: <yEncExpress_Rulz!_www.techsono.com_3222994726@firstva.com>

Hi Everybody,

1) Does OS X have a thing like the Add/Remove Programs control panel on 
Windows XP?

My Tiger system had Python v2.3.5 on it and I threw the files in the trash and 
installed v2.4.1, which is working fine as far as I can tell. However, when I 
type python at the command line, I get "command not found" so,

2) How do I get OS X to recognize python at the command line?

Thanks,
Matt





From lycka at carmen.se  Thu Feb  9 08:03:31 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 09 Feb 2006 14:03:31 +0100
Subject: Question about idioms for clearing a list
In-Reply-To: <ZatGf.28418$F_3.14242@newssvr29.news.prodigy.net>
References: <mailman.1294.1138727665.27775.python-list@python.org>	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>	<mailman.1489.1139232969.27775.python-list@python.org>	<ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>	<mailman.1537.1139297533.27775.python-list@python.org>	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>	<mailman.1546.1139320907.27775.python-list@python.org>	<dscdtr$ciu$1@wake.carmen.se>
	<mailman.1594.1139403378.27775.python-list@python.org>
	<dsd311$qlp$1@wake.carmen.se>
	<ZatGf.28418$F_3.14242@newssvr29.news.prodigy.net>
Message-ID: <dsfej3$1i6$1@wake.carmen.se>

Bryan Olson wrote:
> The original question was about idioms and understanding, but
> there's more to the case for list.clear. Python is "duck typed".
> Consistency is the key to polymorphism: type X will work as an
> actual parameter if and only if X has the required methods and
> they do the expected things.
> 
> Emptying out a collection is logically the same thing whether
> that collection is a list, set, dictionary, or user-defined
> SortedBag.  When different types can support the same operation,
> they should also support the same interface. That's what
> enables polymorphism.

I agree that emptying is logically the same thing for all of these
types. Beyond that, they don't seem to have a lot in common. It's
quite possible to support a duck typing approach that works for all
sorts of sequences, but it's fairly meaningless to use ducktyping
for conceptually different types such as dicts, lists and sets.

Do you really have a usecase for this? It seems to me that your
argument is pretty hollow.

For lists, which are mutable sequences, you add new data with .insert,
.append or .extend. You replace or remove existing data using indexing
l[x] or slicing l[x:y] in del or assignment statements. You can also
remove data with .pop or .remove. These overlapping methods have
specific use. l.remove(x) is short for del l[l.index(x)] (it's also
faster, and that sometimes matter) and .pop() is there to support a
stack-like behaviour.

Dicts use indexing d[x] or .update to either add new data or to replace
existing data. There is no distinction between these operations in
dicts, since dicts are semantically so different from sequences. They
have content, but no order, no specific "positions". You can delete
one item at a time with del d[x], but since slices don't make sense
for dicts, there is a d.clear() method to achieve this common task
quickly. One could imagine that it was allowed to write "del d[]" or
something like that, but then we also expect x = d[] and d[] = x to
work... We probably don't want that.

Sets are also semantically different, and thus use a different set of
operations. They share the lack of order with dicts, but they aren't
pairs, so the semantics is naturally different. They don't support
indexing at all, since they neither have order nor keys.

As far as I understand, the only operation which is currently used
by all three collections is .pop, but that takes a different number
or parameters, since these collections are conceptually different!

Then we have Queues. They have a different purpose, and again, a
different API, since they provide features such as blocking or non-
blocking reads and writes.


From dausha at gmail.com  Sat Feb 18 22:32:25 2006
From: dausha at gmail.com (Ben Wilson)
Date: 18 Feb 2006 19:32:25 -0800
Subject: - Copy dictionary entries to attributes
In-Reply-To: <dt7kv6$dcn$1@usenet.otenet.gr>
References: <dt7kv6$dcn$1@usenet.otenet.gr>
Message-ID: <1140319945.169944.31940@g14g2000cwa.googlegroups.com>

Perhaps:

def dictionary_make_attributes(self, settings):
     for k,v in settings:
         setattr(self, k, v)

http://ftp.python.org/doc/lib/built-in-funcs.html#l2h-64



From siona at chiark.greenend.org.uk  Wed Feb 22 08:06:31 2006
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 22 Feb 2006 13:06:31 +0000 (GMT)
Subject: Little tool - but very big size... :-(
References: <mailman.2211.1140513270.27775.python-list@python.org>
	<1140513852.240140.144160@f14g2000cwb.googlegroups.com>
	<vfJKf.11031$rL5.4951@newssvr27.news.prodigy.net>
Message-ID: <33A*1HX-q@news.chiark.greenend.org.uk>

BJ in Texas <bjtexas at hotmale.con> wrote:
>bonono at gmail.com wrote:
>|| 11MB is seldom a concern for today's machine.
>A good windows/microsoft attitude.. :-)

I wish 8-( :

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 3715 root      15   0  288m 128m 154m S  1.0  6.3  14902:42 XFree86
  735 <user>    15   0  156m  84m  40m S  0.3  4.2   3:55.48 firefox-bin
 3533 root      16   0 85652  74m 1572 S  0.0  3.7   0:00.22 pcscd
 3904 <user>    15   0 67768  49m  17m S  0.3  2.4   4:48.16 gnome-terminal
  449 <user>    16   0 58484  41m  39m S  0.0  2.1  16:18.60 kmail
 4010 <user>    16   0 49056  34m  22m S  0.0  1.7   0:01.63 kdeinit
31724 <user>    16   0 94708  32m  34m S  0.0  1.6   0:49.03 epiphany
 3892 <user>    15   0 41696  22m  19m S  0.0  1.1   0:20.60 nautilus
28992 <user>    15   0 57984  19m  22m S  0.0  1.0   5:53.66 kdeinit
 3902 <user>    16   0 26948  18m  11m S  0.0  0.9   1:50.81 xemacs
 4237 <user>    15   0 29784  15m  22m S  0.0  0.8   0:01.24 python
  444 <user>    16   0 24384  15m  20m S  0.0  0.7   0:08.99 gaim
 4026 <user>    15   0 29924  14m  28m S  0.0  0.7   0:12.59 kdeinit
 4012 <user>    16   0 27352  14m  25m S  0.0  0.7   0:33.24 kdeinit
 5388 <user>    15   0 26008  13m  24m S  0.0  0.7   0:02.06 kdeinit
  350 <user>    15   0 20456  12m  17m S  0.0  0.6   0:05.05 gnome-panel

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From erniedude at gmail.com  Sat Feb  4 16:16:41 2006
From: erniedude at gmail.com (Ernesto)
Date: 4 Feb 2006 13:16:41 -0800
Subject: Making Popen items terminate when program ends.
In-Reply-To: <mailman.1403.1139021049.27775.python-list@python.org>
References: <1139011851.330605.262740@g14g2000cwa.googlegroups.com>
	<mailman.1403.1139021049.27775.python-list@python.org>
Message-ID: <1139087801.754207.17530@o13g2000cwo.googlegroups.com>


Peter Hansen wrote:
> Please see this page: http://docs.python.org/ref/strings.html and read
> about escape sequences in strings, and about raw strings.

Thanks Peter.  Forgot about that one.  In a way, I wish it *would* have
given me trouble, so I could have found it early rather than later.



From Nainto at gmail.com  Wed Feb 22 19:44:10 2006
From: Nainto at gmail.com (Nainto)
Date: 22 Feb 2006 16:44:10 -0800
Subject: Using a list of RGB data for Canvas widget? [(R1, G1, B1), (R2, G2,
	B2) etc.]
Message-ID: <1140655450.201394.25840@g47g2000cwa.googlegroups.com>

Hi, I have searched the arhives and Google, plus I have tried this on
my own, but I cannot find a way to convert a list of RGB values to a
Tkinter PhotoImage or BitmapImage to use with the Tkinter canvas
widget.  I'd rather not have to use PIL or anything but pure Python,
it's included modules, and Tkiner. Reason being, I would like to port
this/the project it is in to other platforms that may not have anything
else. Any help would be greatly appreciated. Thanks!



From deets at nospam.web.de  Sun Feb  5 04:28:45 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 05 Feb 2006 10:28:45 +0100
Subject: how to run BeautifulSoup in Jython
In-Reply-To: <mailman.1423.1139092442.27775.python-list@python.org>
References: <mailman.1423.1139092442.27775.python-list@python.org>
Message-ID: <44luqeF2rcqsU1@uni-berlin.de>

ye juan schrieb:
> Hi, 
> 
> Anyone tries to use BeautifulSoup (
> http://www.crummy.com/software/BeautifulSoup/  ) in
> Jython? I can not run that ,the error that Jython
> gives me is: unpack sequence too long. 

You've asked that on th jython mailing list and got a negative answer.
What makes you think this forum here, with way more broader scope, will
yield a different answer on that very specific topic?

And your asking pretty much of people to guess what's wrong and maybe
could be fixed, if all you provide is a single sentence of
error-message. I suggest you read

http://www.catb.org/~esr/faqs/smart-questions.html

and come back with a little more information -like stacktraces, jython
version used and so on. Then maybe, but only maybe, someone can tell if
and how one can make BeautifulSoup run under jython.

Diez


From aleaxit at yahoo.com  Mon Feb 20 12:34:33 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 20 Feb 2006 09:34:33 -0800
Subject: changing value of 'self' when subclassing int
References: <mailman.2170.1140453870.27775.python-list@python.org>
Message-ID: <1hb1wvf.a4h0jc1pvihnaN%aleaxit@yahoo.com>

David Coffin <dcoffin at gmail.com> wrote:

> I'd like to subclass int to support list access, treating the integer
> as if it were a list of bits.

Fine, but:

> Assigning bits to particular indices involves changing the value of  
> the integer itself, but changing 'self' obviously just alters the  

...integers are immutable, like all other numbers in Python: there is NO
way to "change the value of the integer itself".

I originally proposed to have "mutable numbers" (at least optionally) in
gmpy, but the reaction was a broadside against the idea, to the point
that I never got around to it -- gmpy includes a lot of functionality
for bit-level manipulation, but still only with immutable bitlists
(mapped into gmpy.mpz instances).


Alex


From fabianosidler at gmail.com  Mon Feb  6 16:55:38 2006
From: fabianosidler at gmail.com (Fabiano Sidler)
Date: Mon, 6 Feb 2006 22:55:38 +0100
Subject: Using bytecode, not code objects
In-Reply-To: <d3d66b1c0601291236l691aae57j@mail.gmail.com>
References: <mailman.1183.1138496140.27775.python-list@python.org>
	<1138514565.112950.212310@o13g2000cwo.googlegroups.com>
	<d3d66b1c0601291236l691aae57j@mail.gmail.com>
Message-ID: <d3d66b1c0602061355x3345b970s@mail.gmail.com>

2006/1/29, Fabiano Sidler <fabianosidler at gmail.com>:
> 28 Jan 2006 22:02:45 -0800, Raymond Hettinger <python at rcn.com>:
> > But if you want to make your life unnecessarily hard, you can hack the
> > compiler module just upstream from the creation of the code object --
> > alter the newCodeObject() method in pyassem.py.
>
> Thanks! I think this will help me, because it demonstrates how a code
> object is to be created (with new.code), although in a very
> complicated way.

Are you familiar with this module? I don't get the essence of it, even
with pdb (which I'm surely not using as neatly as it could be). Or is
there any documentation on it I couldn't find?

Greetings,
F. Sidler


From kayama at st.rim.or.jp  Sat Feb 25 12:05:28 2006
From: kayama at st.rim.or.jp (Akihiro KAYAMA)
Date: Sun, 26 Feb 2006 02:05:28 +0900 (JST)
Subject: Pure python implementation of string-like class
In-Reply-To: <dtprtf$5dr$1@sea.gmane.org>
References: <20060225.102645.74687871.kayama@st.rim.or.jp>
	<dtprtf$5dr$1@sea.gmane.org>
Message-ID: <20060226.020528.71156723.kayama@st.rim.or.jp>

Hi Steve.

In article <dtprtf$5dr$1 at sea.gmane.org>,
Steve Holden <steve at holdenweb.com> writes:

steve> Akihiro KAYAMA wrote:
steve> > Hi all.
steve> > 
steve> > I would like to ask how I can implement string-like class using tuple
steve> > or list. Does anyone know about some example codes of pure python
steve> > implementation of string-like class?
steve> > 
steve> > Because I am trying to use Python for a text processing which is
steve> > composed of a large character set. As the character set is wider than
steve> > UTF-16(U+10FFFF), I can't use Python's native unicode string class.
steve> > 
steve> "Wider than UTF-16" doesn't make sense.

Sorry for my terrible English. I am living in Japan, and we have a
large number of characters called Kanji. UTF-16(U+0000...U+10FFFF) is
enough for practical use in this country also, but for academic
purpose, I need a large codespace over 20-bits. I wish I could use
unicode's private space (U+60000000...U+7FFFFFFF) in Python.

-- kayama


From reply.in.the.newsgroup at my.address.is.invalid  Fri Feb 24 05:33:29 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Fri, 24 Feb 2006 11:33:29 +0100
Subject: Exception-handling
References: <slrndvtm56.9s5.oddr@apal.ii.uib.no>
Message-ID: <u4otv1phj6034gvnb4sdmu31ujuosos5hg@4ax.com>

Odd-R.:
>I thought Exception would catch all exceptions. 

Try this:

    import sys

    try:
        pass # your code here
    except:
        e = sys.exc_value()

Either to catch everything, or to get a hold on e.

-- 
Ren? Pijlman


From sakcee at gmail.com  Mon Feb 20 21:22:16 2006
From: sakcee at gmail.com (Sakcee)
Date: 20 Feb 2006 18:22:16 -0800
Subject: html parser , unexpected '<' char in declaration
In-Reply-To: <mailman.2198.1140483714.27775.python-list@python.org>
References: <1140473997.262973.149260@f14g2000cwb.googlegroups.com>
	<mailman.2198.1140483714.27775.python-list@python.org>
Message-ID: <1140488536.933840.65530@o13g2000cwo.googlegroups.com>

thanks for the reply

well probabbly I should explain more.  this is part of an email . after
the mta delivers the email, it is stored in a local dir.
After that the email is being parsed by the parser inside an web based
imap client at display time.

I dont think I have the choice of rewriting the message!? and I dont
want to reject the message alltogether.

I can either 1-fix the incoming html by tidying it up
or 2- strip only plain text out and dispaly that you have spam, 3 - or
ignore that mal-formatted tag and display the rest



From mfranklin1 at gatwick.westerngeco.slb.com  Wed Feb 15 05:49:56 2006
From: mfranklin1 at gatwick.westerngeco.slb.com (Martin Franklin)
Date: Wed, 15 Feb 2006 10:49:56 +0000
Subject: Downloading files using urllib in a for loop?
In-Reply-To: <43F2F8A6.2060303@gatwick.westerngeco.slb.com>
References: <1139996216.765104.119260@g14g2000cwa.googlegroups.com>
	<43F2F8A6.2060303@gatwick.westerngeco.slb.com>
Message-ID: <43F30754.4000109@gatwick.westerngeco.slb.com>

Martin Franklin wrote:
> justsee at gmail.com wrote:
>> Hi,
>>  I'm using Python 2.3 on Windows for the first time, and am doing
>> something wrong in using urllib to retrieve images from urls embedded
>> in a csv file. If I explicitly specify a url and image name it works
>> fine(commented example in the code), but if I pass in variables in this
>> for loop it throws errors:
>>
>> --- The script:
>>
>> import csv, urllib
>> reader = csv.reader(open("source.csv"))
>> for x,y,z,imagepath in reader

I just noticed the code you sent will not work... notice the lack of a 
colon ( : ) and the end of the 'for' line....

please post an exact copy of your code and also the results with the
included print debugging line (with or without repr ;) )



Cheers
Martin


>>   theurl = imagepath[:55]
>>   theimage = imagepath[55:-8]
> 
> "No such file or directory: ''" sounds to me like you are trying
> to open a file called '' (empty string)
> 
> try adding some debugging
> 
>      print theimage, imagepath
> 
> 
> 
>>   urllib.urlretrieve(theurl, theimage)
>>   #urllib.urlretrieve("http://someurl/image.gif", "image.gif") # works!
>>
>> --- The errors:
>>
>> This throws the following errors:
>>   File "getimages.py", line 9, in ?
>>     urllib.urlretrieve(theurl,theimage)
>>   File "C:\Python23\lib\urllib.py", line 83, in urlretrieve
>>     return _urlopener.retrieve(url, filename, reporthook, data)
>>   File "C:\Python23\lib\urllib.py", line 213, in retrieve
>>     fp = self.open(url, data)
>>   File "C:\Python23\lib\urllib.py", line 181, in open
>>     return getattr(self, name)(url)
>>   File "C:\Python23\lib\urllib.py", line 410, in open_file
>>     return self.open_local_file(url)
>>   File "C:\Python23\lib\urllib.py", line 420, in open_local_file
>>     raise IOError(e.errno, e.strerror, e.filename)
>> IOError: [Errno 2] No such file or directory: ''
>>
>> ---
>>
>> Would really appreciate some pointers on the right way to loop through
>> and retrieve images, as I've tried various other solutions but am
>> clearly missing something simple!
>>
>> Thanks,
>>
>> justin.
>>
> 



From LittlePython at lost.com  Thu Feb 16 18:34:36 2006
From: LittlePython at lost.com (LittlePython)
Date: Thu, 16 Feb 2006 23:34:36 GMT
Subject: Seaching Active Directory via ADO
Message-ID: <g_7Jf.33401$0H1.22606@trnddc04>

I am have trouble finding a simple working example of  using ADO to search
Active Directory. I am hoping someone could point me to a generic working
script that connects to AD and pulls up a recordset to help me get started
into the right direction in learning ADO, ADSI on Python.




From ivoras at fer.hr  Sat Feb  4 18:18:22 2006
From: ivoras at fer.hr (Ivan Voras)
Date: Sun, 05 Feb 2006 00:18:22 +0100
Subject: would it be feasable to write python DJing software
In-Reply-To: <ds3cgf$r61$1@bagan.srce.hr>
References: <1138925819.465108.181760@o13g2000cwo.googlegroups.com><druc1r$cre$1@bagan.srce.hr><1138962918.427815.70300@g14g2000cwa.googlegroups.com><drvdq6$gjq$1@bagan.srce.hr><1138966084.385205.254410@g14g2000cwa.googlegroups.com>	<drvf4m$t79$1@bagan.srce.hr>
	<mailman.1380.1138967196.27775.python-list@python.org>
	<ds3cgf$r61$1@bagan.srce.hr>
Message-ID: <ds3cpg$mo6$1@bagan.srce.hr>

Ivan Voras wrote:

> Because "bar and aba happen to be parts of extension library" :)

To end this disussion: I meant "doing it in C" as a colloquial 
expression, not a technical one. The expression holds true for every 
case where a function/class/module/etc is implemented in a lower-level 
language, and "C" was used only as an example.


From bronger at physik.rwth-aachen.de  Sun Feb 19 15:12:18 2006
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Sun, 19 Feb 2006 21:12:18 +0100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
Message-ID: <87bqx3glb1.fsf@wilson.homeunix.com>

Hall?chen!

Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> writes:

> Alexander Schmolck a ?crit :
>
>> Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> writes:
>> 
>>> [...]
>>>
>>> It's not a "scripting" language, and it's not interpreted.
>>
>> Of course it is. What do you think happens to the bytecode?
>
> Ok, then what do you think happens to 'machine' code ?
>
> "interpreted" usually means "no compilation, all parsing etc
> redone at each execution", which is not the case with a
> bytecode/vm based implementation.

That sounds like an implementation feature rather than a language
feature.  Besides, it's not a very sensible distinction in my
opinion.  Much better is to think about the structure of the
interpreting machine.  I'm not a CS person (only a physicist) but if
you *need* a bytecode interpreter on top of the CPU interpretation,
it's an interpreted language to me.

I've had such a discussion about TeX already, and my personal
conclusion was that you can defend almost any opinion in that area.
However, one should ensure that the definitions make a pragmatic and
useful distinction.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus            ICQ 264-296-646


From steve at holdenweb.com  Wed Feb  8 23:42:39 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 08 Feb 2006 23:42:39 -0500
Subject: random playing soundfiles according to rating.
In-Reply-To: <1139456949.087347.173800@o13g2000cwo.googlegroups.com>
References: <1139456949.087347.173800@o13g2000cwo.googlegroups.com>
Message-ID: <dseh81$rp5$1@sea.gmane.org>

kp87 at lycos.com wrote:
> I am a little bit stuck ....
> 
> I want to play a bunch of soundfiles randomly, but i want to give each
> soundfile a rating (say 0-100) and have the likelihood that the file be
> chosen be tied to its rating so that the higher the rating the more
> likely a file is to be chosen.  Then i need some additional flags for
> repetition, and some other business. I am guessing a dictionary would
> be a great way to do this, with the key being the soundfile name and
> the values being my ratings and other flags & associated data.
> 
> #soundfile name : [rating, %chance it will repeat/loop]
> sfiles = { ("sf001") : [85, 15],
>      ("sf002") : [25, 75],
>      ("sf003") : [95, 45],
>      ("sf004") : [35, 95] }
> 
> 
> But i am stuck on how to do a random chooser that works according to my
> idea of choosing according to rating system. It seems to me to be a bit
> different that just choosing a weighted choice like so:
> 
> def windex(lst):
> 	'''an attempt to make a random.choose() function that makes weighted
> choices
> 
> 	accepts a list of tuples with the item and probability as a pair
> 	like: >>> x = [('one', 0.25), ('two', 0.25), ('three', 0.5)]
> 	>>> y=windex(x)'''
> 	n = random.uniform(0, 1)
> 	for item, weight in lst:
> 		if n < weight:
> 			break
> 		n = n - weight
> 	return item
> 
> 
> And i am not sure i want to have to go through what will be hundreds of
> sound files and scale their ratings by hand so that they all add up to
> 100%. I just want to have a long list that i can add too whenever i
> want, and assign it a grade/rating according to my whims!
> 

A really cheesy scheme: decide you will allocate each file a probability 
between 0 and 10 or 1 and 10 - whatever. 100 may be a bit much - do you 
really need such fine discrimination?

If you have your list [(filename, prob), (filename, prob), ... ] then 
construct a filename list as follows:

flist = []
for filename, prob in lst:
     flist += [filename] * prob

Then choosing a filename becomes quite simple:

file_to_play = random.choice(flist)

The rest is up to you ...

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From steven.bethard at gmail.com  Thu Feb  9 12:29:40 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 09 Feb 2006 10:29:40 -0700
Subject: super(...).__init__() vs Base.__init__(self)
In-Reply-To: <43eb5a9d$1_2@newspeer2.tds.net>
References: <43eb5a9d$1_2@newspeer2.tds.net>
Message-ID: <K5mdnTQ_1Ime4XbeRVn-ig@comcast.com>

Kent Johnson wrote:
> Are there any best practice guidelines for when to use
>   super(Class, self).__init__()
> vs
>   Base.__init__(self)
> to call a base class __init__()?
> 
[snip]
 >
> 3. A third fix might be to change both Base and threading.Thread() to 
> call super(...).__init__(). This might break existing code that is 
> written in the style of fix 1 (calling both base class __init__() 
> methods explicitly).

Personally, I'd call the lack of the super calls in threading.Thread and 
Base bugs.  So code relying on that behavior needs to be fixed when the 
bug is fixed.  But __init__() is definitely a tricky case since the 
number of arguments tends to change in the __init__() methods of classes...

STeVe


From arkanes at gmail.com  Tue Feb 21 12:48:42 2006
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 21 Feb 2006 11:48:42 -0600
Subject: Python vs. Lisp -- please explain
In-Reply-To: <1140539404.440390.172350@g44g2000cwa.googlegroups.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com>
	<mailman.2160.1140440898.27775.python-list@python.org>
	<1140454473.335788@jetspin.drizzle.com>
	<pan.2006.02.20.21.59.12.636908@REMOVETHIScyber.com.au>
	<1140490302.639049@jetspin.drizzle.com>
	<mailman.2231.1140532613.27775.python-list@python.org>
	<1140539404.440390.172350@g44g2000cwa.googlegroups.com>
Message-ID: <4866bea60602210948x10bff91elbff376bc8ec116f8@mail.gmail.com>

On 21 Feb 2006 08:30:04 -0800, Paul Boddie <paul at boddie.org.uk> wrote:
> Chris Mellon wrote:
> >
> > You're correct as far as it goes, but can you provide a reasonable
> > definition for "interpreted" that matches the common usage? Most
> > people can't.
>
> I thought Torsten's definition was good enough: if the instructions
> typically produced when preparing your programs for execution can be
> handled directly by the CPU then let's call it a "compiled language";
> otherwise, let's call it an "interpreted language". I think we all know
> about the subtleties of different levels of virtual machines, but if
> you want an arbitrary definition that lots of people feel is intuitive
> then that's the one to go for.
>
> > When asked to name some interpreted (or scripting) languages, they'll
> > name some off - perl, python, ruby, javascript, basic...
>
> Right: compiled Perl and Python instructions typically aren't executed
> directly by the hardware; Ruby visits the parse tree when executing
> programs (see [1] for some casual usage of "interpreted" and "compiled"
> terms in this context), although other virtual machines exist [2];
> JavaScript varies substantially, but I'd imagine that a lot of the
> implementations also do some kind of parse tree walking (or that the
> developers don't feel like documenting their bytecodes), although you
> can also compile JavaScript to Java class files [3]; BASIC varies too
> much for any kind of useful summary here, but I'd imagine that early
> implementations have tainted the language's "compiled" reputation
> substantially.
>
> > They won't say Java. Ask them why Python is interpreted and Java isn't
> > and you'll have a hard time getting a decent technical answer, because
> > Python isn't all that different from Java in that regard, especially
> > pre-JIT versions of Java.
>
> That's why I put Java and Python in the same category elsewhere in this
> thread. Bear in mind, though, that Java's just-in-time compilation
> features were hyped extensively, and I imagine that many or most
> implementations have some kind of native code generation support,
> either just-in-time or ahead-of-time.
>

Early Java versions did not, and many versions still don't, at least
in any meaningful way. There are ways of compiling "native" Java, but
they work more like py2exe than GCC. "Native code generation" is a
fairly imprecise term in and of itself - Psyco works almost exactly
the same way as Java JIT does,

> > Probably the most accurate definition of "interpreted" as it is used
> > in the wild is "one of these languages: perl, python, perl, ruby,
> > etc". That is, you're essentially claiming that Python is interpreted
> > because everyone thinks of it that way, technical correctness be
> > damned.
>
> Well, I think Torsten's definition was more objective and yet arrives
> at the same result. Whether we're happy with that result, I have my
> doubts. ;-)

I don't think it does, though. Firstly, as a definition it relies on
the environment the application will be running under and therefore
can't be considered to describe just a language. Secondly, by that
definition Java is an interpreted language which is at odds with the
common definition.

I've encountered a C scripting environment that works by using GCC to
compile each line as it is encountered, doing some magic to keep a
working compilation environment around.

Interpreted? Compiled?

>
> > There is an obvious difference between Python and C. Nobody would deny
> > that. But it's a fairly hard thing to *quantify*, which is why people
> > make sloppy categorizations. That's not a problem as long as there
> > isn't prejudice associated with the categorization, which there is.
>
> I refer you again to Torsten's definition.
>

Torstens definition isn't useful for quantifying a difference between
interpeted and compiled - it's a rough sort of feel-test. It's like
how much of a naked body you can expose before before it changes from
art to pornography - it's not something that is easily quantified.

> > I wonder how "interpreted" people would think Python is if the
> > automagic compilation to .pyc was removed and you had to call
> > "pythonc" first.
>
> Well, such things might have a psychological impact, but consider
> removing Python's interactive mode in order to enhance Python's
> non-interpreted reputation, and then consider Perl (an interpreted
> language according to the now-overly-referenced definition) which
> doesn't have an interactive mode (according to [4] - I don't keep up
> with Perl matters, myself), but which allows expression evaluation at
> run-time. No-one would put Perl together with C in a compiled vs.
> interpreted categorisation. Removing the automatic compilation support
> might strengthen the compiled feel of the both languages further, but
> with knowledge of the technologies employed, both languages (at least
> in their mainstream forms) are still on the other side of the fence
> from C.
>
> Paul
>
> [1] http://www.rubygarden.org/faq/entry/show/126
> [2] http://www.atdot.net/yarv/
> [3] http://www.mozilla.org/rhino/doc.html
> [4] http://dev.perl.org/perl6/rfc/184.html
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From grante at visi.com  Mon Feb  6 10:17:43 2006
From: grante at visi.com (Grant Edwards)
Date: Mon, 06 Feb 2006 15:17:43 -0000
Subject: Best way of finding terminal width/height?
References: <96nFf.43896$d5.199922@newsb.telia.net>
	<11uc3dohfitotc5@corp.supernews.com>
	<jysFf.155352$dP1.513537@newsc.telia.net>
	<11udc0r2bq11042@corp.supernews.com> <43E719EE.3040401@gmail.com>
Message-ID: <11ueq4nhn91qm91@corp.supernews.com>

On 2006-02-06, Joel Hedlund <joel.hedlund at gmail.com> wrote:
> Thank you for a very quick, informative and concise response.
>
>> BTW: don't forget to attach a handler to the window-size-change
>> signal (SIGWINCH) so that you know when your terminal changes sizes
>
> Do you mean something like this?
>
> import signal, os
> # terminal_info contains the example from my first post
> from terminal_info import get_terminal_size
>
> TERMINAL_SIZE = get_terminal_size()

A stylistic point: In almost all Python programs, uppercase
identifiers are almost always reserved for constants (as in C).
The language itself doesn't care, of course.

> def update_terminal_size(signum, frame):
>     global TERMINAL_SIZE
>     TERMINAL_SIZE = get_terminal_size()
>
> signal.signal(signal.SIGWINCH, update_terminal_size)
>
> while True:
>     # Do lots of IO (fishing for exceptions...)
>     open('/a/large/file').read()
>     print TERMINAL_SIZE

Hmm. There things you're not allowed to do in a signal handler.
I don't know if the TIOCGWINSZ ioctl() is one of them or not.
If it's not allowed, then what one usually does is set a flag
in the signal handler then check the flag in your main loop and
do the ioctl() there.

> The docs for the signal module
> (http://docs.python.org/lib/module-signal.html) say that 
> """
> When a signal arrives during an I/O operation, it is possible
> that the I/O operation raises an exception after the signal
> handler returns. This is dependent on the underlying Unix
> system's semantics regarding interrupted system calls.
>
> """
> So this is what I'm trying to provoke in the final while loop.
> In this case I get no exceptions (hooray!).

I wouldn't be surprised if Python catches that exception and
restarts the I/O operation.

> However, if I replace open('/a/large/file').read() with
> raw_input() I get EOFError (no errmsg), and even worse, if I
> replace it with sys.stdin.read() or even print
> open('/a/large/file').read() I get IOError: [Errno 4]
> Interrupted system call.

Yup, that's the exception.  Standard practice is to catch it and
retry the I/O operation.

> I do lots of IO in my work, and primarily with gigantic text
> files (welcome to bioinformatics :-). Protecting my code from
> this sort of error (i believe) will be quite hard, and
> probably won't look pretty. Or am I missing something?

You might want to try just setting a flag in the signal handler
to see if that prevents the I/O operations on stdin/stdout from
being interrupted.

> Note though that these realtime updates aren't essential to me
> at the moment. Basically all I need is to find out for each
> run how much space I have so I can text wrap command line help
> text (as in myprog --help) as user friendly as possible. 

It sounds like getting the terminal width once at the start of
the program is probably good enough.  That's what a lot of
text-mode programs that aren't doing a log of fancy full-screen
stuff do.

> I mean: I believe that for those environments where $COLS and
> $ROWS are set then python will probably have access to the
> termios module as well, and for those environments that don't
> have $COLS and $ROWS set then python probably will not have
> access to the termios module either. So, in the latter case
> I'm back to square one, which is arbitrary guesswork.

Yes, that's probably true.  In that case, most people assume
80x24.

> I just might. I've got some stuff that people may benefit from
> (or possibly hate, I don't know ;-). If I ever sum up the
> courage to publish it, would it be a good idea to post the
> modules to python-dev at python.org, or is there some better
> route?

I think what most people do initially is to put the module
somewhere publically accessible and post an announcement to
c.l.p and c.l.p.a.  If you feel particularly ambitious you
could create a project for it on sourceforge or somewhere like
that.  I don't know what the procedure is for nominating a
module for inclusion in the standard library.

-- 
Grant Edwards                   grante             Yow!  YOW!! Now I
                                  at               understand advanced
                               visi.com            MICROBIOLOGY and th' new
                                                   TAX REFORM laws!!


From scott.daniels at acm.org  Wed Feb  8 10:37:22 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Wed, 08 Feb 2006 07:37:22 -0800
Subject: module with __call__ defined is not callable?
In-Reply-To: <pan.2006.02.08.10.21.24.46790@REMOVETHIScyber.com.au>
References: <mailman.1580.1139367500.27775.python-list@python.org>
	<pan.2006.02.08.10.21.24.46790@REMOVETHIScyber.com.au>
Message-ID: <43ea0efd$1@nntp0.pdx.net>

Steven D'Aprano wrote:
> On Wed, 08 Feb 2006 13:58:13 +1100, Delaney, Timothy (Tim) wrote:
> 
>> adam johnson wrote:
>>
>>> Hi All.
>>> I was wondering why defining a __call__ attribute for a module
>>> doesn't make it actually callable. 
>> For the same reason that the following doesn't work
> [snip example]
>> The __call__ attribute must be defined on the class (or type) - not on
>> the instance. A module is an instance of <type 'module'>.
> 
> That's not a _reason_, it is just a (re-)statement of fact. We know that
> defining a __call__ method on a module doesn't make it callable. Why not?
> The answer isn't "because defining a __call__ method on a module or an
> instance doesn't make it callable", that's just avoiding the question.

You missed it.  Steven D'Aprano was telling you why, and all you heard
was the no.  He stated a more general principal which controls why
modules in particular are not callable.  It is not a design decision
about modules; it is a design decision about classes and instances.

     class SomeClass(object):
          def __call__(self): return 'Text'

     class AnotherClass(object):
          def __repr__(self): return 'Missive'

     name = SomeClass()()  # this works
     name = AnotherClass()()  # this doesn't
     obj = AnotherClass()  # build an instance
     def fun(*args): return 'more text' # *args so nearly any call works
     obj.__call__ = fun    # tack a function onto an instance
     obj()  # note this doesn't call the function.

Now, if you think the last _should_ do the call, then let's step
back to classes.

     class SomeClass(object):
          def __call__(self): return 'Text'

Now the SomeClass object (which is a subclass of object) has an
attribute named "__call__".  Should that define how the expression
     SomeClass()
is evaluated?  Should that return the string 'Text' or create a
new instance of SomeClass?

--Scott David Daniels
scott.daniels at acm.org


From steve at REMOVETHIScyber.com.au  Thu Feb 16 12:17:51 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 17 Feb 2006 04:17:51 +1100
Subject: pythonic way of 'b = list(a); b.append(4)"
References: <1140105883.069632.262530@g43g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.16.17.17.51.94174@REMOVETHIScyber.com.au>

On Thu, 16 Feb 2006 08:04:43 -0800, szabi wrote:

> Hi!
> 
> I have a list of three values and want to call a function with four
> parameters. I would like
> to write something like:
> 
> a = [1, 2, 3]
> f(*a, 4)
> 
> This is syntactically wrong, so is there a function which appends a
> value to a list and
> returns the new value, so that I could write something like this:
> 
> f(list(a).functional_append(4))

Sure there is, just not as a list method. Python is a programming
language, you can write any function you like:

def functional_append(L, extra):
    """Return a new list consisting of extra appended to the items of L."""
    return L + [extra]

Now call it like this:

f(functional_append(a, 4))

But in fact you can now optimize the functional_append away by just doing
this:

f(*a+[4])

and it will work.


-- 
Steven.



From kent at kentsjohnson.com  Tue Feb 28 15:43:38 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Tue, 28 Feb 2006 15:43:38 -0500
Subject: Thread Question
In-Reply-To: <1141155072.500444.215130@v46g2000cwv.googlegroups.com>
References: <1141155072.500444.215130@v46g2000cwv.googlegroups.com>
Message-ID: <4404b15a_3@newspeer2.tds.net>

D wrote:
> My question is, how would I go
> about creating the thread?  I have seen examples that used classes, and
> other examples that just called one thread start command - when should
> you use one over another?

For simple use it doesn't matter. Use a class when you want to add more 
state or behaviour - for example you might want a flag that tells the 
thread to stop, or a Queue to communicate with the thread. A class might 
be more convenient in these cases.

IOW if you can write it as a single function it doesn't matter much 
which form you use; for more complex usage you may want a class.

Kent


From per9000 at gmail.com  Fri Feb 24 09:46:45 2006
From: per9000 at gmail.com (per9000)
Date: 24 Feb 2006 06:46:45 -0800
Subject: problem(s) with import from parent dir: "from ../brave.py import
	sir_robin"
In-Reply-To: <mailman.2398.1140791484.27775.python-list@python.org>
References: <1140786637.451247.16210@e56g2000cwe.googlegroups.com>
	<mailman.2396.1140788093.27775.python-list@python.org>
	<1140790231.071029.236550@i40g2000cwc.googlegroups.com>
	<mailman.2398.1140791484.27775.python-list@python.org>
Message-ID: <1140792405.276665.71280@v46g2000cwv.googlegroups.com>

...and there was much rejoicing... Even better, thanks - you guys are
the best.

import string, time, sys
sys.path.append("../../py_scripts")

Works just nice, and yes, I removed the env.variable before I tried it
:-D

/Per9000



From fn-mail at t-online.de  Sat Feb 11 08:32:58 2006
From: fn-mail at t-online.de (Florian Nykrin)
Date: Sat, 11 Feb 2006 14:32:58 +0100
Subject: Yet another GUI toolkit question...
In-Reply-To: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
References: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
Message-ID: <dskp1p$huu$01$1@news.t-online.com>

Hi Kevin!

I have no experience with Tkinter, but I did some small GUIs with 
wxPython and PyGTK.

wxPython works very well on Windows, but on Linux (Ubuntu/Debian in my 
case) it is very difficult to work with and buggy.
PyGTK-Applications on the other hand maybe do not look totally like 
Windows-Apps, but they work equally good on both systems (and have 
native look when working with Gnome).

I would take a look at PyGTK in combination with Glade, which is what I use.

Regards, Florian.


From bonono at gmail.com  Fri Feb 10 04:17:18 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 10 Feb 2006 01:17:18 -0800
Subject: Question about idioms for clearing a list
In-Reply-To: <1139561603.918405.167120@g47g2000cwa.googlegroups.com>
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au>
	<ds83kd$98m$1@sea.gmane.org>
	<mailman.1510.1139250471.27775.python-list@python.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>
	<mailman.1546.1139320907.27775.python-list@python.org>
	<dscdtr$ciu$1@wake.carmen.se>
	<mailman.1594.1139403378.27775.python-list@python.org>
	<dsd311$qlp$1@wake.carmen.se>
	<ZatGf.28418$F_3.14242@newssvr29.news.prodigy.net>
	<dsfej3$1i6$1@wake.carmen.se>
	<cQRGf.54501$PL5.14689@newssvr11.news.prodigy.com>
	<1haij56.14jpj06cl31lkN%aleaxit@yahoo.com>
	<1139561603.918405.167120@g47g2000cwa.googlegroups.com>
Message-ID: <1139563038.519704.253340@g47g2000cwa.googlegroups.com>


Raymond Hettinger wrote:
> [Alex]
> > So what is the rationale for having list SO much harder to use in such a
> > way, than either set or collections.deque?
>
> Sounds like a loaded question ;-)
>
> If you're asking why list's don't have a clear() method, the answer is
> that they already had two ways to do it (slice assignment and slice
> deletion) and Guido must have valued API compactness over collection
> polymorphism.  The latter is also evidenced by set.add() vs
> list.append() and by the two pop() methods having a different
> signatures.
Sounds to me that it is a preference(style, whatever), rather than some
other posts of this thread argued that "del L[:]" is better.

>
> If you're asking why your specific case looked so painful, I suspect
> that it only looked hard because the adaptation was force-fit into a
> lambda (the del-statement or slice assignment won't work as an
> expression).  You would have had similar difficulties embedding
> try/except logic or a print-statement.  Guido, would of course
> recommend using a plain def-statement:
>
>     L = list()
>     def L_clearer(L=L):
>         del L[:]
>     for listbunch in buncher(src, '', L, L.append, L_clearer):
>         print listbunch
>
Is that really "clearer" ? While it is still very localized(just read a
few lines up for the definition), buncher(src, '', L.append, L.clear)
seems to be clearer to me, especially there are two similar construct
on set/dict above, even the Alex's lambda form conveys more info, IMO.
Usng the new partial function, may be it can be written as :

buncher(src.'', L, L.append, partial(L.__delslice__, 0, sys.maxint))

#assuming list can have at at most maxint items.



From cito at online.de  Sat Feb 11 11:45:03 2006
From: cito at online.de (Christoph Zwerschke)
Date: Sat, 11 Feb 2006 17:45:03 +0100
Subject: Shortest prime number program
In-Reply-To: <1139673716.241461.84110@g47g2000cwa.googlegroups.com>
References: <1139652226.869102.310180@g14g2000cwa.googlegroups.com>
	<1139673716.241461.84110@g47g2000cwa.googlegroups.com>
Message-ID: <dsl4ae$l97$1@online.de>

dickinsm at gmail.com schrieb:
> How about:
> 
> [2]+[x for x in range(1,99) if 2**x%x==2]

If the range goes beyond 340, it also gives non-primes...

-- Christoph


From felipe.lessa at gmail.com  Sat Feb 18 07:51:20 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sat, 18 Feb 2006 10:51:20 -0200
Subject: Should we still be learning this?
In-Reply-To: <xuGdnQRiLabDiGrenZ2dnUVZ_tWdnZ2d@is.co.za>
References: <xuGdnQRiLabDiGrenZ2dnUVZ_tWdnZ2d@is.co.za>
Message-ID: <1140267080.5255.11.camel@kenshin>

Em S?b, 2006-02-18 ?s 14:38 +0200, Max escreveu:
> On monday I start a semester course in Python (the alternative was 
> Java). I was looking through the course outline and noticed the following:
> 
> 1) UserDict is used. This is deprecated, right?

LOL... it's the first time I see someone talking about this module.

/me checks the documentation.

Yep, looks like this module is deprecated since Python 2.2.

> 2) There is no mention of list comprehensions, but map and filter are 
> taught early and then revisited later. I don't think this is good: list 
> comprehensions are, IMO, one of Python's great features, Psyco prefers 
> them, they're more pythonic, and map and filter seem to be going out the 
> window for Python 3000.

Urgh. This sucks. Did they mention generators, at least? Sometimes list
comprehensions are even faster (I didn't check, but I think this one can
be an example of this: [i*2+2 for i in iterator] vs. map(lambda x: x*2
+2, iterator)).

They should have taught both.

> What do you think?

I wonder if they need some updating.

> --Max

Just my two cents,
Felipe.

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From ivoras at __-fer.hr-__  Thu Feb  2 20:35:56 2006
From: ivoras at __-fer.hr-__ (Ivan Voras)
Date: Fri, 03 Feb 2006 02:35:56 +0100
Subject: would it be feasable to write python DJing software
In-Reply-To: <1138925819.465108.181760@o13g2000cwo.googlegroups.com>
References: <1138925819.465108.181760@o13g2000cwo.googlegroups.com>
Message-ID: <druc1r$cre$1@bagan.srce.hr>

Levi Campbell wrote:
> Hi, I'm thinking about writing a system for DJing in python, but I'm
> not sure if Python is fast enough to handle the realtime audio needed
> for DJing, could a guru shed some light on this subject and tell me if
> this is doable or if I'm out of my fscking mind?

Any and all mixing would probably happen in some sort of multimedia 
library written in C (it would be both clumsy to program and slow to 
execute if the calculations of raw samples/bytes were done in python) so 
there shouldn't be a noticable performance hit.


From fuzzyman at gmail.com  Wed Feb 15 09:14:35 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 15 Feb 2006 06:14:35 -0800
Subject: Pythonic gui format?
In-Reply-To: <43f314df$0$32162$626a54ce@news.free.fr>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<43f11990$0$667$626a54ce@news.free.fr>
	<1139923105.939191.200660@z14g2000cwz.googlegroups.com>
	<1140003644.055366.316620@g47g2000cwa.googlegroups.com>
	<43f314df$0$32162$626a54ce@news.free.fr>
Message-ID: <1140012875.616899.146890@f14g2000cwb.googlegroups.com>


bruno at modulix wrote:
> Fuzzyman wrote:
> (snip)
>
> > You say you don't want an 'extra layer' between your GUI  and Python -
> > but your approach of using XML has the same drawback. Storing your 'GUI
> > configuration' in a text based format is a nice idea, but you will need
> > *something* to do the translation.
>
> Well, if the conf is valid Python, you've already get most of the
> 'something to do the translation' for free !-)
>

Except he can't use ordinary dictionaries because they don't preserve
order, which is one of his requirements...

Your trivial example below redone with ConfigObj syntax :

[window]

widgets = , # empty list

Code to read it :

from configobj import ConfigObj
gui_object = ConfigObj(filename)

All thebest,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml


>
> --
> bruno desthuilliers
> python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
> p in 'onurb at xiludom.gro'.split('@')])"



From robert.kern at gmail.com  Tue Feb 21 00:42:25 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 20 Feb 2006 23:42:25 -0600
Subject: Multiple assignment and the expression on the right side
In-Reply-To: <dte84b$568$1@home.itg.ti.com>
References: <dte84b$568$1@home.itg.ti.com>
Message-ID: <dte983$3mv$1@sea.gmane.org>

Suresh Jeevanandam wrote:
> Dear all,
> 	I read in "Python in a Nutshell" that when we have multiple assignments 
> made on a single line, it is equivalent to have those many simple 
> assignments and that the right side is evaluated once for each 
> assignment. [The wordings are mine. I am not sure if this is what he 
> intended].

No, it isn't. He says, "Each time the statement executes, the right-hand side
expression is evaluated once." "[T]he statement" refers to the multiple
assignment as a whole.

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From drewdr at yahoo.com  Thu Feb  2 23:53:04 2006
From: drewdr at yahoo.com (drewdr at yahoo.com)
Date: 3 Feb 2006 05:53:04 +0100
Subject: VB to Python migration
References: <DjyCf.110918$AP5.12355@edtnps84>
Message-ID: <ggn5u15qt6k4ghvv4di1uisittdrrhk184@4ax.com>

On Fri, 27 Jan 2006 23:48:51 GMT, Josh <josh-post at istedconsulting.com>
wrote:

>We have a program written in VB6 (over 100,000 lines of code and 230 UI 
>screens) that we want to get out of VB and into a better language. The 
>program is over 10 years old and has already been ported from VB3 to 
>VB6, a job which took over two years. We would like to port it to 
>Python, but we need to continue to offer upgrades and fixes to the 
>current VB6 version. Does anybody know of ways we could go about 
>rewriting this, one screen at a time, in Python, and calling the screens 
>from the existing program?
>
>We are also looking for a graphics toolkit to use. IronPython with it's 
>.NET bindings and ability to integrate with Visual Studio looks good, 
>but leaves that bad MS taste in the mouth.
>

Because MS is too expensive ?

What you're trying to do sounds ideal for an N-tier application in
.NET, where the DAL is isolated, and you can you use both VB and
ASP.NET to access business objects.


From crutcher at gmail.com  Sun Feb 19 21:34:48 2006
From: crutcher at gmail.com (Crutcher)
Date: 19 Feb 2006 18:34:48 -0800
Subject: New Module: CommandLoop
Message-ID: <1140402888.715649.182190@g44g2000cwa.googlegroups.com>

This is something I've been working on for a bit, and I think it is
more or less ready to bring up on this list. I'd like to add a module
(though probably not for 2.5).

Before you ask, this module is _not_ compatible with cmd.py, as it is
command oriented, whereas cmd.py is line oriented.

Anyway, I'm looking for feedback, feature requests before starting the
submission process.

Code available here:
http://littlelanguages.com/web/software/python/modules/cmdloop.py

Base class for writing simple interactive command loop environments.

CommandLoop provides a base class for writing simple interactive user
environments.  It is designed around sub-classing, has a simple command
parser, and is trivial to initialize.

Here is a trivial little environment written using CommandLoop:

   import cmdloop

   class Hello(cmdloop.CommandLoop):
       PS1='hello>'

       @cmdloop.aliases('hello', 'hi', 'hola')
       @cmdloop.shorthelp('say hello')
       @cmdloop.usage('hello TARGET')
       def helloCmd(self, flags, args):
           '''
           Say hello to TARGET, which defaults to 'world'
           '''
           if flags or len(args) != 1:
               raise cmdloop.InvalidArguments
           print 'Hello %s!' % args[0]

       @cmdloop.aliases('quit')
       def quitCmd(self, flags, args):
           '''
           Quit the environment.
           '''
           raise cmdloop.HaltLoop

   Hello().runLoop()

Here's a more complex example:

   import cmdloop

   class HelloGoodbye(cmdloop.CommandLoop):
       PS1='hello>'

       def __init__(self, default_target = 'world'):
           self.default_target = default_target
           self.target_list = []

       @cmdloop.aliases('hello', 'hi', 'hola')
       @cmdloop.shorthelp('say hello')
       @cmdloop.usage('hello [TARGET]')
       def helloCmd(self, flags, args):
           '''
           Say hello to TARGET, which defaults to 'world'
           '''
           if flags or len(args) > 1:
               raise cmdloop.InvalidArguments
           if args:
               target = args[0]
           else:
               target = self.default_target
           if target not in self.target_list:
               self.target_list.append(target)
           print 'Hello %s!' % target

       @cmdloop.aliases('goodbye')
       @cmdloop.shorthelp('say goodbye')
       @cmdloop.usage('goodbye TARGET')
       def goodbyeCmd(self, flags, args):
           '''
           Say goodbye to TARGET.
           '''
           if flags or len(args) != 1:
               raise cmdloop.InvalidArguments
           target = args[0]
           if target in self.target_list:
               print 'Goodbye %s!' % target
               self.target_list.remove(target)
           else:
               print "I haven't said hello to %s." % target

       @cmdloop.aliases('quit')
       def quitCmd(self, flags, args):
           '''
           Quit the environment.
           '''
           raise cmdloop.HaltLoop

       def _onLoopExit(self):
           if len(self.target_list):
               self.pushCommands(('quit',))
               for target in self.target_list:
                   self.pushCommands(('goodbye', target))
           else:
               raise cmdloop.HaltLoop

   HelloGoodbye().runLoop()



From steve at holdenweb.com  Sun Feb 12 23:30:25 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 12 Feb 2006 23:30:25 -0500
Subject: how do you pronounce 'tuple'?
In-Reply-To: <vuednQcT5sUEn23eRVn-iA@rcn.net>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
Message-ID: <dsp20v$grb$1@sea.gmane.org>

John Salerno wrote:
> Yes, silly question, but it keeps me up at night.  :)
> 
Silly you!

> I know it comes from the suffix -tuple, which makes me think it's 
> pronounced as 'toople', but I've seen (at m-w.com) that the first 
> pronunciation option is 'tuhple', so I wasn't sure. Maybe it's both, but 
> which is most prevalent?
> 
No suffix involved, tuples have a respectable mathematical history going 
back centuries.

> Thanks! Now time to go back to reading the chapter on tuples...

"Tyoople", "toople" or "tupple" depending on who you are, where you grew 
up and who you are speaking to. As with so many Usenet questions, 
there's no right answer, only 314 wrong ones :-)

I teach on both sides of the Atlantic, and have learned to draw a mental 
breath before trying to pronounce the word "router". Americans find the 
British pronunciation ("rooter") hilarious, despite the fact they tell 
me I drive on "Root 66" to get to DC. The Brits are politer, and only 
snigger behind my back when I pronounce it as Americans do, to rhyme 
with "outer".

except-that-there's-no-"t"-in-American-ly y'rs  - steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From eoinrogers at gmail.com  Fri Feb 17 14:51:08 2006
From: eoinrogers at gmail.com (Byte)
Date: 17 Feb 2006 11:51:08 -0800
Subject: Another stupid newbie question
In-Reply-To: <mailman.2065.1140204717.27775.python-list@python.org>
References: <1140203709.145048.314180@g43g2000cwa.googlegroups.com>
	<mailman.2065.1140204717.27775.python-list@python.org>
Message-ID: <1140205868.660418.234980@z14g2000cwz.googlegroups.com>

Great, thanks all. Now, how come

        if x == mx: print x
                    break

Dosnt work?
 -- /usr/bin/byte



From a-steinhoff at web.de  Sun Feb 19 15:46:09 2006
From: a-steinhoff at web.de (Armin Steinhoff)
Date: Sun, 19 Feb 2006 21:46:09 +0100
Subject: editor for Python on Linux
In-Reply-To: <dtai6e$23m$2@ariane.blic.net>
References: <dtai6e$23m$2@ariane.blic.net>
Message-ID: <dtalce$1at$03$1@news.t-online.com>

Mladen Adamovic wrote:
> Hi!
> 
> I wonder which editor or IDE you can recommend me for writing Python 
> programs. I tried with jEdit but it isn't perfect.
>

Nothing is perfect ... but try SciTE and Eric 
http://www.die-offenbachs.de/detlev/eric3.html

--Armin

http://www.steinhoff-automation.com




From xavier.morel at masklinn.net  Sun Feb  5 14:32:34 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Sun, 05 Feb 2006 20:32:34 +0100
Subject: Learning Python
In-Reply-To: <1139166748.487806.175850@g44g2000cwa.googlegroups.com>
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
	<1139156577.897100.69140@g43g2000cwa.googlegroups.com>
	<mailman.1439.1139157505.27775.python-list@python.org>
	<1139158796.288778.244000@z14g2000cwz.googlegroups.com>
	<ds5c0n$cej$2@aphrodite.grec.isp.9tel.net>
	<1139159843.488988.279770@g43g2000cwa.googlegroups.com>
	<1139160795.149427.120760@g44g2000cwa.googlegroups.com>
	<ds5gun$8v6$1@apollon.grec.isp.9tel.net>
	<1139166748.487806.175850@g44g2000cwa.googlegroups.com>
Message-ID: <ds5jo1$g98$1@aphrodite.grec.isp.9tel.net>

Byte wrote:
> I asked to keep it simple! Anyway, ill try Dive into Python, thanks
> 
It is simple, merely explicit and with some details.


From lycka at carmen.se  Mon Feb 13 11:12:27 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Mon, 13 Feb 2006 17:12:27 +0100
Subject: Rethinking the Python tutorial
In-Reply-To: <1139590229.811612.79580@g44g2000cwa.googlegroups.com>
References: <dsfqv4$shc$1@wake.carmen.se>
	<1139590229.811612.79580@g44g2000cwa.googlegroups.com>
Message-ID: <dsqb5c$rlm$1@wake.carmen.se>

UrsusMaximus at gmail.com wrote:
> There are now more than 300 tutorials listed at
> www.awaretek.com/tutorials.html so one could even imagine a
> "mega-tutorial" using the best-of-breed tutorial for each sub-section,
> a la Turbogears ;-)))

We certainly don't need 300 tutorials. :) Pick the best in the
most relevant categories and promote them to official status.
In a way this is obviously like Turbo Gears... Pick the best
ones and package them together. I don't think we need a lot
of categories though. I think we should be conservative in
what we officially promote, and leave the pointers to various
special interests to the wiki. Perhaps one tutorial official
is enough? In that case it should be Swaroop's. That's the
core language tutorial. Mark's is more a series of visits to
the great land of Python applications, and

That's what I'm proposing. I looked at a few of the beginners
tutorials in the list above. Some are pretty old, others are
present a really bad introduction to Python, showing poor
coding style and a poor understanding of Python.

The current official tutorial isn't ideal for beginners without
previous programming experience, and providing a big bunch of
links for beginners to wade through (as in
http://wiki.python.org/moin/BeginnersGuide ) is far from ideal.
There are more than 40 links on that page for the beginners to
ponder over, and if they decide to follow the
BeginnersGuide/NonProgrammers link, they find another 20+ links.

These 60+ links are more or less equally prominent. There is
no "Go *HERE* first. If you have special interests, you might
want to look at something in this list of other resources as
well".

I'm pretty sure it hadn't looked like this if the official
tutorial had been good enough.

Somehow, the state of Python tutorials remind me of Python
web application toolkits...

I think that one good indication that a tutorial is good,
is that it's been translated to other languages. The ones
I know have been translated are Swaroop's, Mark Pilgrims,
Alan Gaulds, and Danny Yoo's Idle tutorial. Out of these,
Swaroop's and Pilgrim's are the "proper" Python Tutorials.
Danny's is an intro to Idle (which is a good thing) and
Alan's is really more focussed on programing in general
than on Python, although Python is the main vehicle.
(Just like How to Think Like a Computer Scientist.)


From godoy at ieee.org  Tue Feb 14 13:38:14 2006
From: godoy at ieee.org (Jorge Godoy)
Date: Tue, 14 Feb 2006 16:38:14 -0200
Subject: How can I find a freelance programmer?
References: <op.s4y9v9olix6gqv@charles>
Message-ID: <873biliy5l.fsf@ieee.org>

Charles <me at privacy.net> writes:

> I am looking for a freelance Python programmer to create a cross-platform
> application with wxPython.
> Any idea where I could find one?

Here?  At Python-jobs?  :-)  At the wxPython mailing list? 

-- 
Jorge Godoy      <godoy at ieee.org>

"Quidquid latine dictum sit, altum sonatur."
- Qualquer coisa dita em latim soa profundo.
- Anything said in Latin sounds smart.


From rocky at panix.com  Thu Feb 23 07:21:32 2006
From: rocky at panix.com (R. Bernstein)
Date: 23 Feb 2006 07:21:32 -0500
Subject: using breakpoints in a normal interactive session
References: <1140636120.056812.119310@g43g2000cwa.googlegroups.com>
	<wihzmkjyp19.fsf@panix3.panix.com>
Message-ID: <wihu0aqz2nn.fsf@panix3.panix.com>

In revising pydb the code and documentation for the routine originally
described, I learn that the pdb equivalent (sort of) is called
set_trace().

However set_trace() will terminate the program when you quit the
debugger, so I've retained this routine and made a couple of
corrections -- in particular to support a restart and make "show args"
work. The changes are in pydb's CVS. Lacking a better name, the
routine is called "debugger".  

There is one other difference between set_trace() and debugger().  In
set_trace you stop at the statement following set_trace(), With
debugger() the call trace shows you in debugger and you may need to
switch to the next most-recent call frame to get info about the
program being debugged.

A downside of the debugger() approach is that debug session
information can't be saved between calls: each call is a new instance
of the debugger and when it is left via "quit" the instance is
destroyed. (In the case of pydb.set_trace() the issue never comes up
because the program is terminated on exit.)

rocky at panix.com (R. Bernstein) writes:

> Here's what I was able to do using the Extended Python debugger.
> http://bashdb.sourceforge.net/pydb/. ....


From python at hope.cz  Tue Feb 14 02:43:07 2006
From: python at hope.cz (Lad)
Date: 13 Feb 2006 23:43:07 -0800
Subject: Jedit
In-Reply-To: <1139894098.074832.324250@f14g2000cwb.googlegroups.com>
References: <ziggy-358301.20045813022006@netnews.asp.att.net>
	<1139894098.074832.324250@f14g2000cwb.googlegroups.com>
Message-ID: <1139902987.585101.258770@g44g2000cwa.googlegroups.com>

Pythonwin is not good,if you use non Ascii characters.I had to moved to
Jedit.

L.B



From irvine.david at gmail.com  Fri Feb 24 16:57:39 2006
From: irvine.david at gmail.com (dirvine)
Date: 24 Feb 2006 13:57:39 -0800
Subject: Encryption
In-Reply-To: <43F48CC2.1010607@websafe.com>
References: <1140048043.749776.198460@g43g2000cwa.googlegroups.com>
	<43F48CC2.1010607@websafe.com>
Message-ID: <1140818259.168634.190650@i40g2000cwc.googlegroups.com>

perfect thanks a lot and I can be cross platform too. cool



From weconsul at ptd.net  Thu Feb 16 01:11:04 2006
From: weconsul at ptd.net (IchBin)
Date: Thu, 16 Feb 2006 01:11:04 -0500
Subject: Xah's Edu Corner: accountability & lying thru the teeth
In-Reply-To: <dt0qou$9sn$1@newsreader3.netcologne.de>
References: <1133844932.007824.26780@g43g2000cwa.googlegroups.com>
	<1136236586.734775.212440@f14g2000cwb.googlegroups.com>
	<1137784561.589887.58380@o13g2000cwo.googlegroups.com>
	<1139909629.798938.284160@g47g2000cwa.googlegroups.com>
	<dss912$luv$1@mamenchi.zrz.TU-Berlin.DE>
	<dt0qou$9sn$1@newsreader3.netcologne.de>
Message-ID: <McGcnZ--cvXkimneUSdV9g@ptd.net>

Claudio Grondi wrote:
> Anno Siegel wrote:
>> Xah Lee <xah at xahlee.org> wrote in comp.lang.perl.misc:
>>
>>
>>> ...a mechanism, so that any fuckhead tech geekers with their
>>> loud cries will hurt badly when they open their mouths in public...
> In this above I hear the voice of someone badly disappointed seeking an 
> apology and excuse for being in that condition in the world around and 
[snip crud]
>>
>> Yeah, good idea!
> Sure it would be very interesting to see the bets and the reasoning 
> behind the pro and contra.
> 
> Claudio
>>
>> Anno

This is a TECHNICAL JAVA PROGRAMMING NG. Take it to a NG who care. AT 
best to the c.l.j.advocacy. Dear Abby may still have a column some where 
or "due haste, take ye to a nunnery".

Thanks in Advance...
IchBin, Pocono Lake, Pa, USA 
http://weconsultants.servebeer.com/JHackerAppManager
__________________________________________________________________________

'If there is one, Knowledge is the "Fountain of Youth"'
-William E. Taylor,  Regular Guy (1952-)


From grahn+nntp at snipabacken.dyndns.org  Sun Feb  5 13:17:30 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 5 Feb 2006 18:17:30 GMT
Subject: triple quoted strings as comments
References: <1138667355.631379.249770@o13g2000cwo.googlegroups.com>
	<drppbn$3rg$1@wake.carmen.se>
	<roy-42D40A.08175201022006@reader2.panix.com>
	<hU2Ef.227454$7f1.7126132@phobos.telenet-ops.be>
Message-ID: <slrnducg9o.2t1.grahn+nntp@frailea.sa.invalid>

On Wed, 01 Feb 2006 13:41:33 GMT, Roel Schroeven <rschroev_nospam_ml at fastmail.fm> wrote:
> Roy Smith schreef:
...
>> /* */ also allows for some truly spectacularly bad coding practices.  Not 
>> long ago, I ran into some real-life code where a previous developer had 
>> commented out about 50 lines of C++ code by just putting a /* at the top 
>> and a */ at the bottom.  I was tearing my hair out trying to figure out how 
>> the code worked until I noticed what he had done.
>
> That happened to me a few times. These days I use an editor with syntax 
> highlighting that shows comments in another color than code. That helps 
> tremendously.

Syntax highlighting, same here. Plus version control so you can see who did
it, and make a mental note not to trust that person in the future ;-)

("#if 0" in C and C++ are better choices, but only marginally. Best is to
remove the code unless you are sure it's needed again soon. Works in all
languages.)

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From steve at REMOVETHIScyber.com.au  Wed Feb  8 05:21:25 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Wed, 08 Feb 2006 21:21:25 +1100
Subject: module with __call__ defined is not callable?
References: <mailman.1580.1139367500.27775.python-list@python.org>
Message-ID: <pan.2006.02.08.10.21.24.46790@REMOVETHIScyber.com.au>

On Wed, 08 Feb 2006 13:58:13 +1100, Delaney, Timothy (Tim) wrote:

> adam johnson wrote:
> 
>> Hi All.
>> I was wondering why defining a __call__ attribute for a module
>> doesn't make it actually callable. 
> 
> For the same reason that the following doesn't work
[snip example]
> The __call__ attribute must be defined on the class (or type) - not on
> the instance. A module is an instance of <type 'module'>.

That's not a _reason_, it is just a (re-)statement of fact. We know that
defining a __call__ method on a module doesn't make it callable. Why not?
The answer isn't "because defining a __call__ method on a module or an
instance doesn't make it callable", that's just avoiding the question.

Someone had to code Python so that it raised an error when you try to call
a module object. Is there a reason why module() should not execute
module.__call__()? I would have thought that by the duck typing principle,
it shouldn't matter whether the object was a class, a module or an int, if
it has a __call__ method it should be callable.


-- 
Steven.



From kenneth.m.mcdonald at sbcglobal.net  Sun Feb  5 22:04:47 2006
From: kenneth.m.mcdonald at sbcglobal.net (Kenneth McDonald)
Date: Sun, 5 Feb 2006 21:04:47 -0600
Subject: test, please ignore
Message-ID: <625485BD-481C-413D-BB3C-1A0EEADD203B@sbcglobal.net>

My last several postings do not seem to have gone through, so here's  
trying again.

Ken


From robert.kern at gmail.com  Wed Feb 22 01:38:52 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 22 Feb 2006 00:38:52 -0600
Subject: May i customize basic operator (such as 1==3)?
In-Reply-To: <BAY108-F85E0B9B4C44B7CAA16D68CDFD0@phx.gbl>
References: <dtgpbb$asm$2@sea.gmane.org>
	<BAY108-F85E0B9B4C44B7CAA16D68CDFD0@phx.gbl>
Message-ID: <dth0tu$59l$1@sea.gmane.org>

kanchy kang wrote:
> many people write test cases with python scripts.
> in these test scripts, there are many validation statements,
> for example, in unittest, failUnless(a == b),(a/b may be stringType or
> intType...)
> 
> during running test scripts, if there is one exception raised from
> failUnless, i still do not know a =?, b= ?... i have to add one statment
> "print a" or "print b" again...
> 
> as i know, there are many validation statements if using python as one
> test tool...

So why don't you just do something like this:

  self.failUnless(a == b, "%s != %s" % (a,b))

As a bonus, that will only print something if the test fails rather than spewing
out a whole bunch of text that's irrelevant when the tests pass.

> i think my suggestion or requirement may benefit users greatly...

Python will never grow the ability to modify methods on the builtin types. We've
discussed several times before, and you can search the archives of this list if
you want more information why this is so.

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From johnjsal at NOSPAMgmail.com  Thu Feb 23 12:29:25 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 23 Feb 2006 17:29:25 GMT
Subject: a little more help with python server-side scripting
In-Reply-To: <slrndvrr2d.b9m.sybrenUSE@schuimige.unrealtower.org>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<Lc0Lf.1652$No6.38850@news.tufts.edu>
	<slrndvp4tc.9ng.sybrenUSE@schuimige.unrealtower.org>
	<WJlLf.1657$No6.38822@news.tufts.edu>
	<slrndvrr2d.b9m.sybrenUSE@schuimige.unrealtower.org>
Message-ID: <VhmLf.1659$No6.38802@news.tufts.edu>

Sybren Stuvel wrote:

> I wouldn't know, never used Python ;-)


So far, me neither.  :)


From dukeblues1975 at yahoo.com  Wed Feb 15 00:36:38 2006
From: dukeblues1975 at yahoo.com (dukeblues1975 at yahoo.com)
Date: 14 Feb 2006 21:36:38 -0800
Subject: Do you want your own free virtual mall?? Come here...
Message-ID: <1139981798.699481.215570@g14g2000cwa.googlegroups.com>

http://www.telebay.com/esolutions/mall.html



From enterr at gmail.com  Thu Feb 16 03:29:42 2006
From: enterr at gmail.com (Atanas Banov)
Date: 16 Feb 2006 00:29:42 -0800
Subject: %SystemDrive%
References: <dsvt14$rev$1@solaris.cc.vt.edu><43F37BDE.9020505@activestate.com>
	<mailman.1965.1140031059.27775.python-list@python.org>
	<dsvv5j$4dm$1@solaris.cc.vt.edu>
	<UrRIf.6602$rL5.1340@newssvr27.news.prodigy.net>
Message-ID: <1140078582.875226.49780@o13g2000cwo.googlegroups.com>

Bryan Olson wrote:
> To get it with the \, you might use:
>
>      os.path.abspath(os.environ['SYSTEMDRIVE'])

wrong!
the result is incorrect if the current directory is different from the
root.

>>> os.chdir("c:\\winxp")
>>> os.path.abspath(os.environ['SYSTEMDRIVE'])
'c:\\winxp'

if you really want it with backslash at the end, why not just add it

    os.environ['SYSTEMDRIVE'] + '\\'

is it too simple?!



From Jeff.Quandt at bhmi.com  Fri Feb 24 13:44:40 2006
From: Jeff.Quandt at bhmi.com (Jeff Quandt)
Date: Fri, 24 Feb 2006 12:44:40 -0600
Subject: ReadEventLog doesn't return, CPU usage increases
Message-ID: <FE541E59EAD94E4793CAD0C03DB01AEC886EA5@clavin.whq.bhmi.com>

This is running Python 2.3 on windows 2003/windows xp.

I have written a script to display and filter the Win32 event log in a scrolling list to the command line (it also does some summary tasks).  It uses the win32evtlog.ReadEventLog to seek or scan the event log based on filter parameters.  It is supposed to run until the user kills it, so there are repeated calls to ReadEventLog.  

The problem is that after the script has run from some time (usually several hours), the call to ReadEventLog seems to hang and the CPU usage increases dramatically (from nil to 30-50%).  The script does not exit this stage, and has to be broken manually with Ctrl-C.  I've tried closing and reopening the event log handle after it has been open for an hour.  I've added explicit calls to the garbage collector.  Neither helped at all.

I realize that this is an API call, so it may not be a python issue.  But I have seen this type of behavior on other scripts (not event loggers), but they were test/debug tools and weren't important enough to track down the issue.

Any help would be appreciated.

code example:

    def OpenLog( self ):
        #
        #open event log
        #
        self.mHandle              = win32evtlog.OpenEventLog( self.mComputer
                                                            , self.mLogType
                                                            )
        if not self.mHandle:
            raise ValueError, "invalid handle"

        self.mLogOpenTmst = time.time()

    def CloseLog( self ):

        win32evtlog.CloseEventLog( self.mHandle     )

    def ReadLog( self ):

	self.mFlags = win32evtlog.EVENTLOG_FORWARDS_READ|win32evtlog.EVENTLOG_SEEK_READ
            vEventScon  = win32evtlog.ReadEventLog( self.mHandle
                                                  , self.mFlags
                                                  , self.mLogOffset
                                                  )
            #
            # if not found, try again in 5 seconds
            #
            if not vEventScon:

                #
                # If we've had the log open for more than 1 hour, dump it and reopen
                #
                if ( time.time() > (self.mLogOpenTmst + 3600) ):
                    self.CloseLog()
                    self.OpenLog()

                time.sleep( 5 )
                return bOk

	#
	# snip...
	# manipulate event records here
	#

#
# main
#
OpenLog
Ok = 1
while Ok:
	Ok = ReadLog()
CloseLog()

Jeff

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From steve at REMOVETHIScyber.com.au  Fri Feb 10 06:40:02 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 10 Feb 2006 22:40:02 +1100
Subject: module with __call__ defined is not callable?
References: <mailman.1580.1139367500.27775.python-list@python.org>
	<pan.2006.02.08.10.21.24.46790@REMOVETHIScyber.com.au>
	<1139394463.255902.168960@f14g2000cwb.googlegroups.com>
	<mailman.1591.1139400885.27775.python-list@python.org>
Message-ID: <pan.2006.02.10.11.40.01.38163@REMOVETHIScyber.com.au>

On Wed, 08 Feb 2006 07:14:04 -0500, Steve Holden wrote:

>>>Someone had to code Python so that it raised an error when you try to call
>>>a module object. Is there a reason why module() should not execute
>>>module.__call__()? I would have thought that by the duck typing principle,
>>>it shouldn't matter whether the object was a class, a module or an int, if
>>>it has a __call__ method it should be callable.
>>>
>> 
>> 
>> It would nice if you could make modules callable.
>> 
> Right. While we're at it, why don't we make strings callable. 

I don't believe strings have a __call__ method, nor do I see any
compelling case for giving one to them. But one could sub-class strings so
they had a __call__ method, in which case they should be callable. Just
like objects with a __len__ method work with len(), and objects with a
__getitem__ method are indexable.


> Calling a 
> string could call the function whose name (in some namespace or other) 
> was in the string. 

Or it could do whatever the __call__ method says it should do.


> And we can make integers callable too - that could 
> just assume that the integer was the address of a function to be called.

No, that wouldn't work, because Python doesn't have pointers. You can't
just jump to an address in memory and execute it. That would be Bad.


> In case you think I'm joking, I am.

I'm not.

> Why should a module be callable? What's the advantage? 

Modules could behave not only as collections of functions, methods,
classes etc., but as single entry-point functions themselves. Or, to put
it another way, modules are not just collections of code which gets called
by other code, but could also be tools in the Unix sense.

Here is a (trivial) hypothetical example:

py> import sillycase
py> sillycase("hello world")
hElLO wOrLd
py> sillycase.start_with_lowercase  # can still see the internals
True

A side-effect of this is you wouldn't need so many calls like glob.glob,
dis.dis or bisect.bisect.


If Python were smart enough to automatically execute the __call__ method
of a module (if it has one) when the module is given as a command line
argument, we could get rid of this boiler-plate code found in oh-so-many
scripts:

if __name__ == '__main__':
    main()  # __call__() would be better





> Should we be able 
> to add two modules together, yielding a module that contains all the 
> code of both modules? 

If modules had a __add__ method, then moduleA + moduleB should do whatever
the __add__ method says. Just as when you add a module to a class
instance, it will do whatever the class __add__ method says.

Frankly I can't think of anything useful adding two modules would do, but
maybe that's my failure of imagination.



-- 
Steven.



From ziga.seilnacht at gmail.com  Sun Feb 19 19:38:05 2006
From: ziga.seilnacht at gmail.com (Ziga Seilnacht)
Date: 19 Feb 2006 16:38:05 -0800
Subject: Req. for module style/organization
References: <mailman.2130.1140374235.27775.python-list@python.org>
Message-ID: <1140395885.666751.316000@z14g2000cwz.googlegroups.com>

RayS wrote:
> I've begun a Python module to provide a complete interface to the
> Meade LX200 command set, and have searched for a style/development
> guide for Python Lib/site-packages type modules, but only saw guides
> for C-modules.  I realize that I need to make some changes to follow
> http://www.python.org/doc/essays/styleguide.html
> better. Does anyone have an appropriate URL for me to follow for this
> task? Is one of the C-module guides appropriate?
>

There are two informal Python Enhancements Proposals:
Style Guide for C Code - http://www.python.org/peps/pep-0007.html
Style Guide for Python Code - http://www.python.org/peps/pep-0008.html

>
> I have:
> LX200/
>      __init__.py
>      LXSerial.py
>      Telescope.py
>      Focuser.py
>      LXUtils.py
>      ... etc
> Each file has one class defined.

This style is not encuraged any more because of the ambiguity with
imports; see
http://mail.python.org/pipermail/web-sig/2006-February/002093.html
for details.

> All advice is appreciated,
> Ray

Ziga



From irvine.david at gmail.com  Fri Feb 10 14:15:54 2006
From: irvine.david at gmail.com (dirvine)
Date: 10 Feb 2006 11:15:54 -0800
Subject: by reference
In-Reply-To: <mailman.1681.1139517426.27775.python-list@python.org>
References: <mailman.1681.1139517426.27775.python-list@python.org>
Message-ID: <1139598954.259297.74290@o13g2000cwo.googlegroups.com>

Thanks but I am a bit unsure as to what error I have made by posting
this question. I am not trying to be funny but can you give me a
pointer to the issue.

Many thanks
David



From ptmcg at austin.rr._bogus_.com  Fri Feb 10 13:22:55 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Fri, 10 Feb 2006 18:22:55 GMT
Subject: is there a better way?
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
	<PO4Hf.4221$UN2.1478@tornado.texas.rr.com>
Message-ID: <3S4Hf.4222$UN2.3149@tornado.texas.rr.com>

"Paul McGuire" <ptmcg at austin.rr._bogus_.com> wrote in message
news:PO4Hf.4221$UN2.1478 at tornado.texas.rr.com...
> <markscala at gmail.com> wrote in message
> news:1139594221.696053.7360 at g47g2000cwa.googlegroups.com...
> > Problem:
> >
> > You have a list of unknown length, such as this: list =
> > [X,X,X,O,O,O,O].  You want to extract all and only the X's.  You know
> > the X's are all up front and you know that the item after the last X is
> > an O, or that the list ends with an X.  There are never O's between
> > X's.
> >
> > I have been using something like this:
> > _____________________
> >
> > while list[0] != O:
> >     storage.append(list[0])
> >     list.pop(0)
> >     if len(list) == 0:
> >         break
> > _____________________
> >
> > But this seems ugly to me, and using "while" give me the heebies.  Is
> > there a better approach?
> >
> > hope this is clear.
> > thanks
> >
> Use itertools.
>
> >>> import itertools
> >>> lst = "X,X,X,O,O,O,O,O,X,X,X,X,O,X".split(",")
> >>> [z for z in itertools.takewhile(lambda x:x=="X",lst)]
> ['X', 'X', 'X']
>
>
> -- Paul
>

duh, last line should be:

>>> list(itertools.takewhile(lambda x:x=="X",lst))
['X', 'X', 'X']

(Also, don't name variables "list")

-- Paul




From volker_grabsch at v.notjusthosting.com  Fri Feb  3 20:08:45 2006
From: volker_grabsch at v.notjusthosting.com (Volker Grabsch)
Date: 4 Feb 2006 01:08:45 GMT
Subject: dynamic class instantiation
References: <drlrtb$91v$1@chessie.cirr.com> <43de9abc$1_2@newspeer2.tds.net>
	<drnjid$flc$2@chessie.cirr.com>
	<slrndu0d72.ltb.volker_grabsch@modi.mathematik.hu-berlin.de>
	<drr0na$rp0$1@chessie.cirr.com> <43e2494f$1_1@newspeer2.tds.net>
Message-ID: <slrndu7vkt.3q2.volker_grabsch@modi.mathematik.hu-berlin.de>

Kent Johnson wrote:
> Ognen Duzlevski wrote:
>> I appreciate your comments. Basically, the reason why this code generator
>> exists is the fact that I do not want to hard-code the resulting xml in 
>> any way. The users of the web/db framework of which this solution is part of
>> might like the "web page" definition I offer them, but, some might want to extend it.
>> While dom allows me to traverse an xml hierarchy - it does not allow me to
>> give "meaning" to the tags. The only way to do that (for me) is to represent
>> the tags as classes with containers containing other classes (tags) and so on. Since
>> I do not know ahead of time what the tags will be - I need to generate the code
>> to actually handle them.
>> 
>> Can you suggest a better approach or did you already do that and I just missed 
>> it? :)
>
> Instead of generating Python code and importing it, you could create the 
> classes directly. You would still have your own language but no code 
> generator.

While I agree that this is much better than code generation, why not go
a step further?

Your "description language" could be as well a subset of the Python language.
So you could get rid of the parser, too. Add the "meaning" simply by creating
subclasses in Python.

This approach has the disadvantage of a slightly more complicated syntax of
the definition files. However, the advantage is that this syntax would be
valid Python code, so everyone who's learning it will also learn a small piece
of Python, and thus reusable knowlege. Learning a special newly invented
language (so-called "DSL" - domain specific language) is *not* resuable
knowledge.

The second advantage is a greater flexibility. You can use real Python code
to model some more complex "definition files". Otherwise, you'll have to
enhance your definition language for every new feature or meta-feature
you introduce. In this case, your own language would become more and more
messy over time. Why don't you take a great, well-designed, simple, general
purpose language which already exist? ... such as Python ;-)

However, this is a completely different strategy: You wouldn't parse the
defintion files. Instead, your definition files are Python modules which
your application imports. This can be a security risk if you want these
modules to be edited "online". However, if your definition files are only
put into a directory of the server, i.e. if you handle them just as your
Python sources anyway, this won't be a disadvantage. (Instead, if would be
a great advantage!)

So you have to decide yourself: Do you really need the description files
to be read in on-the-fly? Then stick with your own language. Are your
definition files more like modules/extensions which are installes together
with the source files? Then just *make* them source files, too, i.e.
realize your "description files" simply as Python modules.


Greets,

	Volker

-- 
Volker Grabsch
---<<(())>>---
\frac{\left|\vartheta_0\times\{\ell,\kappa\in\Re\}\right|}{\sqrt
[G]{-\Gamma(\alpha)\cdot\mathcal{B}^{\left[\oint\!c_\hbar\right]}}}


From lycka at carmen.se  Mon Feb 20 13:34:52 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Mon, 20 Feb 2006 19:34:52 +0100
Subject: any ftpd written in python?
In-Reply-To: <mailman.2161.1140442391.27775.python-list@python.org>
References: <mailman.1990.1140070096.27775.python-list@python.org>	<dt1oqf$2fvu$1@ns.felk.cvut.cz>
	<mailman.2161.1140442391.27775.python-list@python.org>
Message-ID: <dtd24c$qg0$2@wake.carmen.se>

Kenneth Xie wrote:
> garabik-news-2005-05 at kassiopeia.juls.savba.sk wrote:
>> self-advertising: http://melkor.dnp.fmph.uniba.sk/~garabik/pyftpd.html
>> it is a bit dated and I do not develop it anymore, but as a base of your
>> own server software it can be quite good.
> 
> Exactly what I need now, thank you very much.

Maybe not. Take a serious look at Twisted before you code your own.


From fox at ultratechnology.com  Mon Feb 20 15:01:17 2006
From: fox at ultratechnology.com (fox at ultratechnology.com)
Date: 20 Feb 2006 12:01:17 -0800
Subject: Is Forth for real?
In-Reply-To: <1140449909.473421.224250@g14g2000cwa.googlegroups.com>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
	<1139754010.067582.214830@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>
	<1v44c3-geo.ln1@lairds.us>
	<1140449909.473421.224250@g14g2000cwa.googlegroups.com>
Message-ID: <1140465677.411501.114440@o13g2000cwo.googlegroups.com>

rickman wrote:
> The original post seems to be missing, but my answer to the title
> question is, No, Forth is not real.

Not for real, for Integer.



From s323 at mail.ru  Wed Feb 15 10:40:54 2006
From: s323 at mail.ru (Sergey)
Date: Wed, 15 Feb 2006 18:40:54 +0300
Subject: file names longer than MAX_PATH under Windows 2003
References: <mailman.1900.1139925147.27775.python-list@python.org>
Message-ID: <dsvi28$8u1$1@news.rtcomm.ru>


"Tim Golden" <tim.golden at viacom-outdoor.co.uk> wrote in message news:mailman.1900.1139925147.27775.python-list at python.org...
[Sergey]

>I see from another post that CreateFile cannot open your file.
>That puts it further away from Python, although it doesn't
>explain how some other program can see the files. Can you use
>os.startfile (or its equivalent win32api.ShellExecute from
>pywin32)? Perhaps if you were to chdir to the directory in
>question you'd be able to access the file.

I found error in filename (extra backslash) and now I can open file.
But another trouble appeared: I cannot listdir so long name.
I examined posixmodule.c... There are wcsncpy with hard limit of MAX_PATH*2+5.
So... RIP, my module...




From tzot at sil-tec.gr  Tue Feb 14 08:28:01 2006
From: tzot at sil-tec.gr (Christos Georgiou)
Date: Tue, 14 Feb 2006 15:28:01 +0200
Subject: python-ldap
References: <1139330793.864675.302090@f14g2000cwb.googlegroups.com>
	<mailman.1559.1139333846.27775.python-list@python.org>
	<1139335345.415395.41690@g43g2000cwa.googlegroups.com>
	<t3c1v1ljv4csitbf12k9o0goj96qlmkncb@4ax.com>
	<1139857865.618762.320810@g14g2000cwa.googlegroups.com>
Message-ID: <5jk3v15jqqcemv1r73tmo5juqs6fbor7kc@4ax.com>

On 13 Feb 2006 11:11:05 -0800, rumours say that "btaranto at gmail.com"
<btaranto at gmail.com> might have written:

>hy...

>if you dont know how to help people here... dont say "google it".

I never said "google it".  I presume you mean this post as a reply to all
other posters in this thread, right?  And you can bet your tiny _)_ that
Steve Holden does know how to help people here, something that can be proven
if you google for previous posts of him.

>groups.google was made to help! not to say google it!

groups.google was made to *archive* newsgroups. By using groups.google, you
just participate in the larger community of Usenet.  Google that strange
term "usenet".  It's kind of public email.  You send to a "newsgroup", then
everybody in the world can see your message, and anybody can reply, and so
forth.

You'll see in one of the top hits (for "usenet") that Google sometime
acquired the Usenet Archive of Deja (Deja.com, DejaNews.com etc), which are
archives of newsgroups since before Google existed.  There is no company
"google.groups" full of professionals getting paid to answer your questions.

Think of groups.google as an agency that allows you to travel in the
dangerous world of Usenet.

>i really dont not what kind of professional you are to say "google it!"

Assuming you reply to Steve Holden; you have false logic.  Like I said,
nobody ever gets paid for replying to newsgroup posts, so professionalism
does not get involved in any sense.  Or have you sent any money to the PSF
[Python Software Foundation] asking for support?  If that is the case, I
fully apologize, and please don't read the rest of my post! ;)

>you are smart boy!

I used to be before I grew up.

>i think your mom has much pride of you!

Especially since she will shortly be a grand mother.

>google it to learn more than say "google it!"

Your writing style hints you are 14-15 yrs old, but you can also be some
non-native English speaker (as I am), even an IT professional (the topic of
LDAP does not concern the average adolescent :); in either case, perhaps you
might be able and not entirely bored to read more than a few pages:

http://www.catb.org/~esr/faqs/smart-questions.html

Let this be your guide in your travels in Usenet.  Show you did your
"homework" before asking others.

You see, imagine yourself after about 15-20 years of using computers and
discussing them with others (in private or on the internet), and new people
keep coming all the time asking the same questions that have been discussed,
answered and beaten to death dozens of times before.  Steve's using
computers for longer than that, and he bothered at least to tell you the
obvious step you didn't take: to google your question so you find the
previous related discussions.

You should thank him for offering his time, because his reply was helpful
even if you don't understand it; he directed you to the whereabouts of the
answer to your question.  Ask groups.google about

group:comp.lang.python ldap

and work your way from there.  When you come back here after you've grokked
the "Smart Questions" document, I (and Steve I am sure, and lots of others
who didn't bother to reply as Steve did) will be more than glad to help you
further your knowledge of Python.

Cheers, btaranto.
-- 
TZOTZIOY, I speak England very best.
"Dear Paul,
please stop spamming us."
The Corinthians


From duncan.booth at invalid.invalid  Sun Feb 26 12:27:04 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 26 Feb 2006 17:27:04 GMT
Subject: sort one list using the values from another list
References: <mailman.2447.1140969980.27775.python-list@python.org>
	<Bb-dncKoOeYvQ5zZRVn-uw@comcast.com>
Message-ID: <Xns9776B17D2BFC2duncanbooth@127.0.0.1>

Steven Bethard wrote:

> Here's a solution that makes use of the key= argument to sorted():
> 
> >>> A = ['hello','there','this','that']
> >>> B = [3,4,2,5]
> >>> indices = range(len(A))
> >>> indices.sort(key=B.__getitem__)
> >>> [A[i] for i in indices]
> ['this', 'hello', 'there', 'that']
> 
> Basically, it sorts the indices to A -- [0, 1, 2, 3] -- in the order 
> given by B, and then selects the items from A in the appropriate order.
> 
> 

That's impressive. I'm sure like a lot of other people I looked at the 
question and thought it ought to be possible to use key to get this result 
without a load of zipping and unzipping but just couldn't quite see it.

If you combine your technique with 'sorted', you get the one line version:

>>> [A[i] for i in sorted(range(len(A)), key=B.__getitem__)]
['this', 'hello', 'there', 'that']



From cipherpunk at gmail.com  Thu Feb 16 03:03:01 2006
From: cipherpunk at gmail.com (Robert J. Hansen)
Date: 16 Feb 2006 00:03:01 -0800
Subject: Encryption
In-Reply-To: <1140048043.749776.198460@g43g2000cwa.googlegroups.com>
References: <1140048043.749776.198460@g43g2000cwa.googlegroups.com>
Message-ID: <1140076980.984213.203520@g14g2000cwa.googlegroups.com>

Honestly, the best thing you can do when it comes to writing crypto
code is _not_ write crypto code.  It's far better to instead use
pre-existing, trusted, scrutinized, audited code.  You'll probably be
better served looking for a Python interface to OpenSSL, which will
provide you with all the algorithms you'll want and then some.

pyopenssl might be what you're looking for, it might not.  I've never
used it, but that looks like the place to start.



From johnmc at velseis.com.au  Wed Feb  1 22:20:39 2006
From: johnmc at velseis.com.au (John McMonagle)
Date: Thu, 02 Feb 2006 13:20:39 +1000
Subject: nDimensional sparse histogram in python.
In-Reply-To: <1138849589.663600.301610@z14g2000cwz.googlegroups.com>
References: <1138848672.791908.90050@g44g2000cwa.googlegroups.com>
	<1ha3gff.u4comocxo4ddN%aleaxit@yahoo.com>
	<1138849589.663600.301610@z14g2000cwz.googlegroups.com>
Message-ID: <1138850439.546.25.camel@cornell>

On Wed, 2006-02-01 at 19:06 -0800, KraftDiner wrote:
> Cool.
> Ok so my histogram class had two methods 1) To increment a point and 2)
> to get the point.
> 
> def class histo:
>    def __init__(self):
>        histo = {}
> def update(point):
>    '''searches the dictionary for point and if it exists increment the
> value.
>     if it doesn't exist set the value to 1'''
> 
> def get(point):
>    return self.histo[point]
> 
> I'm not sure how to code up the update routine...
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 

def update(point);
  
  if histo.get(point) != None:
    histo[point] = histo[point] + 1

Regards,

John


-- 
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.



From steve at REMOVETHIScyber.com.au  Sun Feb  5 03:30:06 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sun, 05 Feb 2006 19:30:06 +1100
Subject: Does Python support a peek like method for its file objects?
References: <4s3bu1p178o46hh0jcj0eld5git5paog4q@4ax.com>
	<pan.2006.02.05.08.25.20.749932@REMOVETHIScyber.com.au>
Message-ID: <pan.2006.02.05.08.30.06.149080@REMOVETHIScyber.com.au>

On Sun, 05 Feb 2006 19:25:21 +1100, Steven D'Aprano wrote:

> On Sun, 05 Feb 2006 05:45:24 +0000, Avi Kak wrote:
> 
>> Hello:
>> 
>>   Does Python support a peek like method for its file objects?
>> 
>>   I'd like to be able to look at the next byte in a disk file before
>>   deciding whether I should read it with, say, the read() method.
>>   Is it possible to do so in Python?
> 
> 
> # WARNING: untested

Yes, and also completely broken. I don't know what I was thinking. Sigh.
Try this (also untested, but not so obviously broken):



fp = file("some file on disk", "r")  # should work in text mode
b = ""
while 1:
    # peek at the next byte
    c = fp.read(1)
    # decide whether to read it
    if c == "?":
        # pretend we never read the byte
        fp.seek(-1, 1)  # but be careful in text mode! 
        break
    # now read the byte "for real"
    b = c
    if not b:
        # we've reached the end of the file
        break
fp.close()


-- 
Steven.



From aprasad21k at gmail.com  Wed Feb 22 08:14:11 2006
From: aprasad21k at gmail.com (aprasad21k at gmail.com)
Date: 22 Feb 2006 05:14:11 -0800
Subject: What's happened to Jython?
Message-ID: <1140614051.937964.11670@g47g2000cwa.googlegroups.com>

Jython does not seem to have been updated for more than a year. Any
idea whether Jython enhancements are likely to be released in the near
future?



From deets at nospam.web.de  Sat Feb 11 12:30:09 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 11 Feb 2006 18:30:09 +0100
Subject: Jython socket typecasting problems
In-Reply-To: <1139678202.221563.308700@f14g2000cwb.googlegroups.com>
References: <1139678202.221563.308700@f14g2000cwb.googlegroups.com>
Message-ID: <456l92F554abU1@uni-berlin.de>

> This is the code section of my server class (I cut this from a Python
> example):
>     def establishConnection(self):
>         self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>         self.socket.connect((self.host, self.port))
> Do I have to use explicit typecasting? How can this be achieved?

There is no such thing as explicit casting in python. You can coerce 
values to values of another type - e.g. float("1.0"), and there are some 
"magic" methods to support that (for that example __float__)

However, that doesn't seem to be your problem. You just pass the wrong 
arguments, which makes the jython wrapping punke on you as only certain 
types can be dealt with.

To me this looks as if you are supposed to do it like this:

self.socket.connect(self.host, self.port)

Note the missing parentheses.

Diez


From cdkrug at aol.com  Wed Feb  8 18:04:58 2006
From: cdkrug at aol.com (Charles Krug)
Date: Wed, 08 Feb 2006 17:04:58 -0600
Subject: breadth first search
References: <43ea2271$1@127.0.0.1>
Message-ID: <QrCdnUhH6ImH5HfeRVn-jQ@comcast.com>

On 2006-02-08, News <nickyncy at yahoo.com.hk> wrote:
> I am new in using Python
>
> Anyone know how to implement breadth first search using Python?  Can Python
> create list dynamically, I want to implement a program which will read data
> from a file and store each line into a list, is this possible?
>
> Please send mail to me at nickyncy at yahoo.com.hk or reply this mail
>
> Thanks a lot!
>

Yes.  List has methods that support a stack, in case you find it useful
in this context.

Yes.  List has methods that allow dynamic creation, such as might be
useful when implementing a stack, in case you find it useful in this
context.

And Yes.  File has methods that will populate a list from a file.
Examples are in the tutorials.

You're welcome.

You can find numerous examples of the breadth-first algorithm on the
web.  You can then take the individual steps and translate them into
Python.  You'll likely find one or two sticking points, but the
implementation is straightforward from pseudocode or from a GOOD
statement of the algorithm.



From aleaxit at yahoo.com  Mon Feb 27 10:30:11 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 27 Feb 2006 07:30:11 -0800
Subject: Use of __slots__
References: <dtt8ga$7b2$1@sea.gmane.org> <dtt9o8$ams$1@sea.gmane.org>
	<mailman.2475.1141051433.27775.python-list@python.org>
Message-ID: <1hbepsi.1ms8ll98un954N%aleaxit@yahoo.com>

Don Taylor <nospamformeSVP at gmail.com> wrote:
   ...
> Does Python have the notion of static class attributes?

No.

> Just what was going on when I redefined my __slots__ attribute?

Nothing.

> It looks as if __slots__ is something really special, or I am managing

Yep: it acts at *class-creation time*, only -- when the class statement
executes (specifically: the class body executes, building a dict; that
dict together with the classname and tuple of bases is passed to the
metaclass, normally 'type' -- 'type' builds a slotted class iff it sees
'__slots__' as a key in the dict, otherwise a normal class).

Most other class attributes matter during the class's lifetime (e.g.,
__metaclass__ matters at class creation time, since it defines which
metaclass is called to do the class creation, but it also matters later,
since the current value of metaclass defines what specialmethods operate
on the classobject), but __slots__ doesn't.  A reasonable design choice:
all existing instances couldn't be retroactively modified to change
their slots, and having two instances of the "same class" that are
incompatible with each other would be weird.

Ideally, 'type' could transform a class's __slots__ into a readonly
property (specifically a tuple of strings, to make it immutable), to
catch any confusion about __slots__ ASAP. However, since __slots__ was
meant for extremely RARE use, and only by very advanced programmers who
fully know what they're doing, so nobody at the time took the trouble of
building such strong fences around it (it wouldn't save us many of the
huge stream of questions and misunderstandings we're getting all the
time about it, anyway).


Alex


From johnjsal at NOSPAMgmail.com  Mon Feb 13 15:44:29 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 13 Feb 2006 20:44:29 GMT
Subject: cyclic data structures
Message-ID: <Nc6If.1604$No6.38177@news.tufts.edu>

I'm having some slight trouble understanding exactly why this creates an 
infinite loop:

L = [1, 2]
L.append(L)

In a highly abstract way, I understand it. But if I were asked to write 
down what I think L is after the second line executes, I would write:

[1, 2, [1, 2]]

But the correct answer seems to be:

[1, 2, [1, 2 [1, 2 [ .......

I guess what confuses me is that there doesn't seem to be anything 
inherent in L itself that would cause this repeat. If you add L to L, 
why don't you just get two Ls? Where does the cycle begin? Is this just 
a quirk that comes with having a variable include a reference to the 
same object the variable references?


From dan.gass at gmail.com  Wed Feb 22 14:22:00 2006
From: dan.gass at gmail.com (dan.gass at gmail.com)
Date: 22 Feb 2006 11:22:00 -0800
Subject: using breakpoints in a normal interactive session
Message-ID: <1140636120.056812.119310@g43g2000cwa.googlegroups.com>

Is there a way to temporarily halt execution of a script (without using
a debugger) and have it put you in an interactive session where you
have access to the locals?  And possibly resume?  For example:

>>> def a():
...   x = 1
...   magic_breakpoint()
...   y = 1
...   print "got here"
...
>>> a()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 3, in a
  File "<stdin>", line 2, in magic_breakpoint
>>> x
1
>>> y
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
NameError: name 'y' is not defined
>>> magic_resume()
got here
>>> x
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
NameError: name 'x' is not defined



From john.thingstad at chello.no  Tue Feb 14 09:55:54 2006
From: john.thingstad at chello.no (John Thingstad)
Date: Tue, 14 Feb 2006 15:55:54 +0100
Subject: Xah's Edu Corner: accountability & lying thru the teeth
References: <1133844932.007824.26780@g43g2000cwa.googlegroups.com>
	<1134780763.066592.45390@g49g2000cwa.googlegroups.com>
	<1135405908.381150.133190@o13g2000cwo.googlegroups.com>
	<1136236586.734775.212440@f14g2000cwb.googlegroups.com>
	<1137784561.589887.58380@o13g2000cwo.googlegroups.com>
	<1139909629.798938.284160@g47g2000cwa.googlegroups.com>
Message-ID: <op.s4yw3gcvpqzri1@mjolner.upc.no>

On Tue, 14 Feb 2006 10:33:49 +0100, Xah Lee <xah at xahlee.org> wrote:

> i longed for such a accountable predictions for a long time. Usually,
> some fucking fart will do predictions, but the problem is that it's not
> accountable. So, lots fuckhead morons in the IT industry will shout
> ... <more obscene language>

Fine, I will hold you accountable for what you said abot IT security
two weeks ago. Let's see 'By switching from C to a high level
language like Lisp all security problems go away, it's that simple.'
Look up 'insertion attack' Then eat SOAP.

lol

-- 
Using Opera's revolutionary e-mail client: http://www.opera.com/mail/


From jdillworth at gmail.com  Fri Feb 10 16:31:11 2006
From: jdillworth at gmail.com (Jeremy Dillworth)
Date: 10 Feb 2006 13:31:11 -0800
Subject: is there a better way?
In-Reply-To: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
Message-ID: <1139607071.530729.258630@g14g2000cwa.googlegroups.com>

You could eliminate a few lines like this:

-----------------------------
while list and list[0] != O:
    storage.append(list.pop(0))
-----------------------------

Adding the "list and " to the front of the logic test will catch when
there are 0 elements, so the "if..break" lines are not needed.  Also
pop() returns the element popped, so there's no need for a separate
"list[0]" and "list.pop(0)"

You could also do the whole thing as a list comprehension (assuming
storage is a list, otherwise += may or may not work):
-----------------------------
storage += [i for i in list if i == X]
-----------------------------

But this is less efficient, since it will loop through all the O's too.
 The other solution stops at the first O.  This will also break if
there are any X's mixed with O's, though you've said that's not
currently the case, things can always change.

Lastly, you could do this:
-----------------------------
list.append(O)
storage += list[:list.index(O)]
-----------------------------

The first line makes sure there is always an O in list, otherwise
index(O) will throw an exception.  That's slightly ugly, but I still
like this solution, myself.

hope this helps,

Jeremy



From usenet05 at yakshavers.net  Mon Feb 13 18:29:20 2006
From: usenet05 at yakshavers.net (usenet05 at yakshavers.net)
Date: 13 Feb 2006 15:29:20 -0800
Subject: intro to python courses?
Message-ID: <1139873360.544170.144240@g43g2000cwa.googlegroups.com>

A smart but non-technical friend would like to take an introductory
programming course, and it seems pretty obvious to me he should look
for something in Python.  He'd prefer to take a college-level course
for credit.  A meatspace class in the Boston, Mass., area or an
online extension course would both be equally acceptable.  Does anyone
know of schools offering such courses?

Thanks in advance!

---Carl
usenet05 at yakshavers.net



From mehmetmutigozel at gmail.com  Tue Feb 28 08:16:54 2006
From: mehmetmutigozel at gmail.com (mehmetmutigozel at gmail.com)
Date: 28 Feb 2006 05:16:54 -0800
Subject: compiled program input
In-Reply-To: <1141131055.777748.153150@v46g2000cwv.googlegroups.com>
References: <1141131055.777748.153150@v46g2000cwv.googlegroups.com>
Message-ID: <1141132614.496574.89600@t39g2000cwt.googlegroups.com>


i found something like

import os

os.system("c\\m.exe")

but it gives

An endfile record was detected in a READ statement (unit=40).
 Error occurs at or near line 51 of _MAIN__
12

still don't have anything :(



From claudio.grondi at freenet.de  Thu Feb 23 16:42:02 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Thu, 23 Feb 2006 22:42:02 +0100
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <mailman.2369.1140730029.27775.python-list@python.org>
References: <mailman.2369.1140730029.27775.python-list@python.org>
Message-ID: <dtla7j$pqs$1@newsreader3.netcologne.de>

Paul Probert wrote:
> Hi,
>   My app runs in a loop looking for changes in a database, and like a 
> good boy I call time.sleep(1) inside the loop. Unfortunately this 
> sometimes runs for 200 seconds or so, presumably while my OS is calling 
> Bill Gates to tell him what I've been doing. This happens under NT4, 
> W2k, and XP. What do people do to fix this? Thanks!
> 
> Paul Probert
> University of Wisconsin
> 

In similar situation I would start to blame the hardware for the 
problem, so below a kind of checklist to go through:

   1. have you changed any hardware?
   2. have you installed new drivers?
   3. have you connected via USB/Firewire/IDE or other interfaces/ports 
etc. some new devices?
   4. have you installed new BIOS?
   5. is your RAM ok?
   6. are you sure there is no CD/DVD in your CD/DVD drive?
   7. are you sure there is no floppy disk in your floppy drive?
   8. are you sure your CPU/motherboard/RAM is not overheating?

Claudio


From dcrespo at gmail.com  Fri Feb 17 10:39:19 2006
From: dcrespo at gmail.com (Daniel Crespo)
Date: 17 Feb 2006 07:39:19 -0800
Subject: Print a PDF transparently
In-Reply-To: <11vbpu58sll1b4f@corp.supernews.com>
References: <1140184955.674138.275010@o13g2000cwo.googlegroups.com>
	<11vbpu58sll1b4f@corp.supernews.com>
Message-ID: <1140190758.951694.231890@f14g2000cwb.googlegroups.com>

Hi, Thanks for all the answers.

My main purpose is to print on Windows systems (98,2000,XP) and permit
to print pages of 1/3 of a letter height, and make the printer to stop
at that point (in dot matrix printers). When I have a PDF with that
paper size and send it to print from Acrobat, it prints and stops
perfect (in Win98, I have to create a custom form consisting of that
paper size). The problem is that PDF files have to be handled by
external applications, or non-free drivers.

Based on all this, I have been investigating about postscript files. I
realize that printers do handle this language, so I think if I have a
.ps file and send it directly to the printer, it should do the job,
right? (this is certainly a question) If the answer is True, no matter
in what platform I am, if I send the same .ps to the printer, it should
print the same result.

And if all of these is true, then, my problem reduces to generate the
.ps file.

Comments please

Daniel



From cito at online.de  Tue Feb  7 16:16:38 2006
From: cito at online.de (Christoph Zwerschke)
Date: Tue, 07 Feb 2006 22:16:38 +0100
Subject: Python 2.4.2 using msvcrt71.dll on Win and compatibility issues
In-Reply-To: <43E8F864.6050605@v.loewis.de>
References: <dsaqcf$jb5$1@online.de> <43E8F864.6050605@v.loewis.de>
Message-ID: <dsb2nn$5qs$1@online.de>

Martin v. L?wis wrote:
> In general, the only Microsoft-supported strategy is that you
> must use only a single msvcrt in the entire application. So
> either recompile PostGres, or recompile Python.

Hm, that's really inconvenient (even more so under Windows).

> In the specific case, having PQprint print to a string (rather
> than to a file) might work. OTOH, it appears there is no "print
> to string" code in postgres.

Yes, there is only PQprint which prints to a stream.

> So here is another strategy: flush the stream before going
> into postgres, then obtain the fileno() of the stream, and
> fdopen it with postgres' iostreams library. That might also
> be tricky to implement, but could work.

I understand what you mean. But the Postgres dll provides no means to 
fdopen a new stream.

-- Christoph


From aleaxit at yahoo.com  Sat Feb  4 10:40:21 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sat, 4 Feb 2006 07:40:21 -0800
Subject: OO conventions
References: <mailman.1334.1138833641.27775.python-list@python.org>
	<43E13F39.2070709@freenet.de>
	<1138928426.867847.66790@g44g2000cwa.googlegroups.com>
	<43e36755$0$26603$636a55ce@news.free.fr>
	<1139038279.801416.8680@g14g2000cwa.googlegroups.com>
Message-ID: <1ha8507.1lk6sxl1859falN%aleaxit@yahoo.com>

Blair P. Houghton <blair.houghton at gmail.com> wrote:
   ...
> > It is (search for 'staticmethod' and 'classmethod'). But there's not
> > much use for 'static methods' in Python - we usually just use plain
> > functions ('classmethods' are another beast - much more useful than
> > staticmethods)
> 
> Does it make any noticeable difference in efficiency, or does nobody
> care much about efficiency in Python?

Some of us do, at few but crucial moments; that's why we have timeit.py
to let you measure the performance of pieces of code you care about.

helen:~ alex$ python -mtimeit -s'class X(object):
>   @staticmethod
>   def f(): pass
> x=X()' 'x.f()'
1000000 loops, best of 3: 1.07 usec per loop
helen:~ alex$ python -mtimeit -s'def f(): pass' 'f()'
1000000 loops, best of 3: 0.727 usec per loop
helen:~ alex$ 

As you see, static methods have a small extra lookup cost (a couple
hundred nanoseconds on my oldish laptop); normally, one would use a
function instead.  But if the body of the function/method did some
significant, the lookup overhead would then matter little; clarity and
organization and simplicity, OTOH, _always_ matter.   "Premature
optimization is the root of all evil in programming", as Knuth wrote
quoting Hoare -- and anybody who's read Knuth's work knows he is
anything BUT indifferent to real optimization; the key is avoiding that
"premature" part!-)


Alex


From bokr at oz.net  Mon Feb  6 21:11:41 2006
From: bokr at oz.net (Bengt Richter)
Date: Tue, 07 Feb 2006 02:11:41 GMT
Subject: Generators vs. Functions?
References: <0001HW.C00ABC2B000323A6F0335550@news.individual.de>
	<43E50E73.40504@kzoo.edu>
	<mailman.1426.1139097119.27775.python-list@python.org>
	<gkeFf.434944$2k.218378@pd7tw1no>
	<pan.2006.02.05.08.14.28.103057@REMOVETHIScyber.com.au>
Message-ID: <43e80087.130055910@news.oz.net>

On Sun, 05 Feb 2006 19:14:29 +1100, Steven D'Aprano <steve at REMOVETHIScyber.com.au> wrote:

>On Sun, 05 Feb 2006 03:31:24 +0000, Neil Schemenauer wrote:
>
>> Peter Hansen <peter at engcorp.com> wrote:
>>> More precisely, the state of the function is *saved* when a yield 
>>> occurs, so you certainly don't *recreate* it from scratch, but merely 
>>> restore the state, and this should definitely be faster than creating it 
>>> from scratch in the first place.
>> 
>> Right.  Resuming a generator is faster than calling a function.
>
>Have you actually measured this, or are you just making a wild guess?
>
>According to a short test performed by Magnus Lycka, resuming a generator
>takes more time than calling a function. My own test agrees.
>
>Here is my test, using Python 2.3. I've tried to make the test as fair as
>possible, with the same number of name lookups in both pieces of test code.
>
># straight function, two name lookups
>
>>>> import timeit
>>>>
>>>> t1 = timeit.Timer(stmt="func.next()", setup=
>... """class K:
>...   pass
>...
>... def next():
>...   return 1
>...
>... func = K()
>... func.next = next
>... """)
>>>>
>>>> t1.timeit()
>0.63980388641357422
>
>
># generator, two name lookups
>
>>>> t2 = timeit.Timer(stmt="gen.next()", setup=
>... """def g():
>...   while 1: yield 1
>...
>... gen = g()
>... """)
>>>>
>>>> t2.timeit()
>0.82081794738769531
>
>
># straight function, one name lookup
>
>>>> t3 = timeit.Timer(stmt="f()", setup=
>... """def f():
>...   return 1
>... """)
>>>> 
>>>> t3.timeit()
>0.47273492813110352
>
>
># generator, one name lookup 
>
>>>> t4 = timeit.Timer(stmt="gnext()", setup=
>... """def g():
>...   while 1: yield 1
>...
>... gnext = g().next
>... """)
>>>>
>>>> t4.timeit()
>0.55085492134094238
>
>
>So on the basis of my tests, there is a small, but significant speed
>advantage to _calling_ a function versus _resuming_ a generator.
>
>Of course the other advantages of generators often far outweigh the tiny
>setup cost each time you call one. In addition, for any complex function
>with significant execution time, the call/resume time may be an
>insignificant fraction of the total execution time. There is little or no
>point in avoiding generators due to a misplaced and foolish attempt to
>optimise your code.
>
I show an advantage favoring generator resumption vs function call:

 >>> from time import clock
 >>> def f(): return clock()
 ...
 >>> def g(): yield clock(); yield clock()
 ...
 >>> max(f()-f() for x in xrange(10000))
 -9.2190462142316409e-006
 >>> max(f()-f() for x in xrange(10000))
 -9.2190462139818408e-006
 >>> max(float.__sub__(*g()) for x in xrange(10000))
 -7.5428559682677587e-006
 >>> max(float.__sub__(*g()) for x in xrange(10000))
 -7.5428559682677587e-006
 >>> max(float.__sub__(*g()) for x in xrange(10000))
 -7.5428559682677587e-006

(It'll probably go ten times faster on a recent box ;-)

Regards,
Bengt Richter


From sybrenUSE at YOURthirdtower.com.imagination  Thu Feb 23 12:09:33 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Thu, 23 Feb 2006 18:09:33 +0100
Subject: a little more help with python server-side scripting
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<Lc0Lf.1652$No6.38850@news.tufts.edu>
	<slrndvp4tc.9ng.sybrenUSE@schuimige.unrealtower.org>
	<WJlLf.1657$No6.38822@news.tufts.edu>
Message-ID: <slrndvrr2d.b9m.sybrenUSE@schuimige.unrealtower.org>

John Salerno enlightened us with:
> That sounds like just what I want, except do I have to write my code
> in Jython? Can't I just use regular Python?

I wouldn't know, never used Python ;-)

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From mathweijzen at home.nl  Wed Feb 22 15:25:30 2006
From: mathweijzen at home.nl (Math)
Date: Wed, 22 Feb 2006 21:25:30 +0100
Subject: DatBases and Pickle Module
Message-ID: <004201c637ee$209249c0$0202a8c0@uw403axvp2ndff>

Hello,

I wonder if someone can help me out.
My native is Dutch, sorry for this....

But I am writing this program, a program which uses Relational DataBase for 
saving all kinds of information in records.
Now I saw another application which stores all kind of identical data in 
plain files, but without any kind of DBMS.
I wonder how they did this?
It also seems alot faster then when working with DBMS.
Can I achieve the same in Python with say..the pickle module.
For instance a dictionary or something else?

Many thanks to you all
Math 



From larrydu at gmail.com  Fri Feb 17 13:03:46 2006
From: larrydu at gmail.com (larrydu at gmail.com)
Date: 17 Feb 2006 10:03:46 -0800
Subject: How to refer to current Interpreter in script?
Message-ID: <1140199426.923039.30520@g43g2000cwa.googlegroups.com>

Hi,

Please excuse me if this is a dumb question, but I am new to
python/jython and can't figure this out. Basically I have a java class
myClass with a static method myMethod that takes a PythonInterpreter as
a parameter.

Now I write a jython script in which I try to invoke that method with
current interpreter as the argument. How do I get this current
interpreter? The implementation of myMethod can't be changed.

import myClass as mc
mc.myMethod(?)

Thanks in advance for your help!

Larry



From duncanm255 at hotmail.com  Tue Feb 28 15:56:25 2006
From: duncanm255 at hotmail.com (D)
Date: 28 Feb 2006 12:56:25 -0800
Subject: Thread Question
In-Reply-To: <4404b15a_3@newspeer2.tds.net>
References: <1141155072.500444.215130@v46g2000cwv.googlegroups.com>
	<4404b15a_3@newspeer2.tds.net>
Message-ID: <1141160185.349819.94610@z34g2000cwc.googlegroups.com>

Guys - I appreciate the clarification.   So it looks like they used a
class for the ping thread because they were a) running multiple
instances of the thread concurrently and b) needing to keep track of
the state of each instance, correct?  I believe that in my case, since
I will be just running one instance of the thread to ensure that the
remote system is functioning properly, that the single statement should
work just fine.



From python.list at tim.thechases.com  Mon Feb 27 03:15:39 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Mon, 27 Feb 2006 02:15:39 -0600
Subject: PEP 354: Enumerations in Python
In-Reply-To: <4402AB7F.7070804@REMOVEMEcyber.com.au>
References: <87accdplbj.fsf@rose.polar.local>	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>
	<4402AB7F.7070804@REMOVEMEcyber.com.au>
Message-ID: <4402B52B.8070301@tim.thechases.com>

>>Why are empty enumerations not allowed?  Empty sets, empty lists,
>>empty dictionaries are all allowed.  I don't see any obvious benefits
>>to not allowing empty enumerations.
> 
> What is an empty enum? How and when would you use it?

It's a Zen thing :)  (agh!  not the zen thread!)

 >>> roundSquares = enum()
 >>> soundsMadeByOneHandClapping = enum()
 >>> def nirvana(emptyness):
...	if emptyness != enum():
...		throw UnthrowableKoan
...

(okay...maybe it's a little too early on a weekdays.mon morning)

-tkc






From deets at nospam.web.de  Thu Feb  2 12:43:57 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 02 Feb 2006 18:43:57 +0100
Subject: my openGL API need threads!!! But how to ,ake it work???
References: <1138883972.001578.149350@g44g2000cwa.googlegroups.com>
	<1138889819.536105.57620@g47g2000cwa.googlegroups.com>
	<44ekogF1oeqgU1@uni-berlin.de>
	<1138901385.767694.288170@g49g2000cwa.googlegroups.com>
Message-ID: <44eun8F1rpr2U1@uni-berlin.de>

Laurent wrote:

> That is exactly what I do not want!!
> 
> this is not transparent, I'm sure it is possible to make what I want:
> Scene = ooglScene()
> Scene.run()
> scene.append(ooglPoint())

Well, if you know so well what you want, why don't you know how to do it?

Besides: just using threads might help  - but as well your whole application
might crash, as inserting scene parts concurrently might f... up internal
structures. 

But if you really want threads (albeit not knowing much about them...) here
you go:


import threading

Scene = ooglScene()
threading.Thread(target=Scene.run)
scene.append(ooglPoint())


Diez


From caseyhHAMMER_TIME at istar.ca  Tue Feb 21 23:06:34 2006
From: caseyhHAMMER_TIME at istar.ca (Casey Hawthorne)
Date: Wed, 22 Feb 2006 04:06:34 GMT
Subject: May i customize basic operator (such as 1==3)?
References: <mailman.2279.1140579610.27775.python-list@python.org>
Message-ID: <l7onv1t5rpivgrutuhqpahu56ah113b7su@4ax.com>

I believe you are asking for a side effect from the "==" operator.

Add print statements to the __eq__ method.

"kanchy kang" <zzhikang at hotmail.com> wrote:

>Hi,all
>as we know, we can override the operator of one object(for example __eq__).
>my question is, how to override the basic operator?
>for example,
>
>for any object comparison operator(including litterals),
>for example,
>a = "123"
>b = "321"
>
>the boolean equation a == b,
>i need override "==" operator like this:
>first display a and b
>
>then return real boolean result (a == b).
>
>thanks!
>
>
>-----------------------------------------------
>Best regards,
>kangzz
>
>mailto:zzhikang at hotmail.com
>Tel : 021-65407754
>MP: 13916928084
>
>_________________________________________________________________
>Express yourself instantly with MSN Messenger! Download today - it's FREE! 
>http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/
--
Regards,
Casey


From sjuranic at gmail.com  Sun Feb 26 17:11:01 2006
From: sjuranic at gmail.com (Steve Juranich)
Date: Sun, 26 Feb 2006 15:11:01 -0700
Subject: Kill forked processes
References: <1140990351.604347.29110@i39g2000cwa.googlegroups.com>
Message-ID: <dtt915$8rd$1@sea.gmane.org>

kmkz wrote:

> I have a program A that forks off two other programs, B and C. I need B
> and C to both terminate if A is closed, but by using the
> subprocess.call() method this seems to not be the case; I can shut down
> the "black box" that is program A and B/C will still stay up.
> 
> How can I achieve the desired behavior?

You'll probably need to take a look at the `signal' and `atexit' modules. 
These will allow you to write hooks that will get called when your A script
is terminated either by a signal or by reaching one of the "natural"
endpoints.

-- 
Steve Juranich
Tucson, AZ
USA



From pinkfloydhomer at gmail.com  Wed Feb  1 05:43:05 2006
From: pinkfloydhomer at gmail.com (pinkfloydhomer at gmail.com)
Date: 1 Feb 2006 02:43:05 -0800
Subject: Parsing sizes
Message-ID: <1138790585.539620.291090@z14g2000cwz.googlegroups.com>

I want to be able to parse sizes in bytes in several formats, such as
"1048576", "1024K", "1024KB", "1M" etc.

Is there a module that will help me with that?

/David



From grflanagan at yahoo.co.uk  Thu Feb 23 08:53:51 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 23 Feb 2006 05:53:51 -0800
Subject: Psychic bug
References: <8qcpv1hrcepsukouv371seacoe40u0lr43@4ax.com>
Message-ID: <1140702831.357109.126630@g14g2000cwa.googlegroups.com>

Jennifer Hallinan wrote:
> Hi,
>
> I have a mutate function for a genetic algorithm which is giving me
> odd results. I suspect I'm missing somthing really simple, so I'd be
> grateful for any suggestions. Basically, when I comment out the line
> which is commented out below, it works fine (although of course it
> doesn't change the genome). When I uncomment it gen[letter]
> automagically gets the value base in the print statements, before the
> assignment has been made. And it still doesn't update the genome.
> Genome is a string of integers in the range 0- 3, hence the
> conversion.
>
>     def Mutate(self, mrate):
>         g = Random(rseed)
>         # If no mutation rate specified, use 1 per genome
>         if mrate == -1:
>             mrate = 1.0/len(self.genome)
>         print "mrate is ", mrate
>
>         print "original genome: "
>         print self.genome
>         # convert genome to a list
>         gen = [ord(letter)-48 for letter in self.genome]
>
>         for letter in range(len(gen)):
>             rnum = g.random()
>             if rnum < mrate:
>                 base = g.randint(0,3)
>                 print "base is ", base
>                 print "pos ", letter, gen[letter], " to ", base
> #                gen[letter] = base
>
>         # convert list back to a string
>         self.genome = ''.join([str(x) for x in gen])
>         print "final genome"
>         print self.genome
>
[...]
>
> Thanks,
>
> Jen


Jen

how about storing the genome data as a list, then converting to a
string if needs be?


import random

class Genome(object):

    def __init__(self, genome):
        self.genome = list(genome)
        self.mrate = 1.0/len(genome)

    def __str__(self):
        return ''.join(self.genome)

    def Mutate(self):
        for i in range(len(self.genome)):
            if random.random() < self.mrate:
                self.genome[i] = str(random.randint(0,2))


print
G = Genome( '10021010212021110' )
print G
G.Mutate()
print G
G.mrate = 0.8
G.Mutate()
print G


Gerard



From grflanagan at yahoo.co.uk  Wed Feb 22 19:55:28 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 22 Feb 2006 16:55:28 -0800
Subject: What's up with this code?
References: <1140649331.924736.128420@g43g2000cwa.googlegroups.com>
Message-ID: <1140656127.943051.76230@g47g2000cwa.googlegroups.com>

Gregory Petrosyan wrote:
> Hello, it's me again.
> I am trying to optimise small module for working with polynomials, and
> I have encountered problem: new, optimised, code, doesn't work in some
> specific case. Here's the old version of the code:
>
> (3x^2 + 2x + 1  <=>  poly([3, 2, 1]), btw)
>
>     def __add__(self, other):
>         "Return sum of two polynomials"
>         rcoefs1 = list(reversed(self.coefs))
>         rcoefs2 = list(reversed(other.coefs))
>         coefs = [c1+c2 for c1,c2 in zip(rcoefs1, rcoefs2)]
>         minlen = min(len(rcoefs1), len(rcoefs2))
>         coefs.extend(rcoefs1[minlen:] + rcoefs2[minlen:])
>         return Polynomial(reversed(coefs))
>

Gregory

It seems that zip/izip will only generate values while all of the
iterable parameters have values, eg. if rcoefs1 has length 3 and
rcoefs2 has length 5, zip will have length 3.  This is the point of the
lines

         minlen = min(len(rcoefs1), len(rcoefs2))
         coefs.extend(rcoefs1[minlen:] + rcoefs2[minlen:])

in the old code - to pad out 'coefs' with the unused values in the
longer 'rcoef'.  I think that's the source of the results you're
getting.

Here's an interactive session:

>>> import itertools as it
>>> a = [1,2,3]
>>> b = [0,0,0,4,5]
>>> c = [ alpha+beta for alpha,beta in it.izip(a,b) ]
>>> c
[1, 2, 3]
>>> inf = min( len(a), len(b) )
>>> inf
3
>>> a[inf:]
[]
>>> b[inf:]
[4, 5]
>>> c.extend( a[inf:] + b[inf:] )
>>> c
[1, 2, 3, 4, 5]

[...]

> Here's the new version:
>
>     def __add__(self, other):
>         rcoefs1 = reversed(self.coefs)
>         rcoefs2 = reversed(other.coefs)
>         coefs = [c1+c2 for c1,c2 in it.izip(rcoefs1, rcoefs2)]
>         coefs.extend(it.chain(rcoefs1, rcoefs2)) #? -- here is magic
>         if coefs[-1] != 0:
>             return Polynomial(reversed(coefs), False, False)
>         else:
>             return Polynomial(reversed(coefs), False)
>
> Last four lines are ok (tested), "magic" seems to occure in #? line.
> What's the magic? Here it is:
>
> poly([1,2,1]) + poly([1,-2,1]) is ok,
> poly([1,-2,1]) + poly([5,4,3,2,1]) is ok,
> poly([1]) + poly([2]) is ok,
> poly([1,2,1]) + poly([5,4,3,2,1]) is ok, but
>
> poly([1,0]) + poly([-1])  gives poly([-1]),
> poly([1,-3]) + poly([-2]) gives poly([-5]) etc.
>
> So, "magic" happens when processing something like poly([a,b]) +
> poly([c]) and it gives poly([b+c]) as result. Can anybody help me with
> it?
>
> Regards, Gregory.


I don't really understand your "magic" line.

Here's some code I was playing about with, it pads the shorter
coefficient list *before* applying izip - nothing distinguished about
it, but maybe instructive as a comparison to what you've got.

import itertools as it

class Polynomial(object):
    def __init__(self, *coeffs):
        self.coefs = list(coeffs)
        #print self.coefs

    def __add__(self, other):
        rcoefs1 = self.coefs[:]
        rcoefs2 = other.coefs[:]
        d1 = len(rcoefs1)
        d2 = len(rcoefs2)
        sup = max( d1, d2 )
        #pad the shorter of the two lists with zeros
        #so that it is the same length as the other
        rcoefs1 += [0] * (sup - d1)
        rcoefs2 += [0] * (sup - d2)
        coefs = [c1+c2 for c1,c2 in it.izip(rcoefs1, rcoefs2 )]
        return Polynomial(*coefs)

    def __str__(self):
        return str(tuple(self.coefs))

print
print Polynomial(1,2,1) + Polynomial(1,-2,1)
a = Polynomial(1,-2,1)
b = Polynomial(5,4,3,2,1)
c = a+b
print a
print b
print c
print Polynomial(1) + Polynomial(2)
print Polynomial(1,0) + Polynomial(-1)
print Polynomial(1,-3) + Polynomial(-2)

Gerard



From fabio.pliger at gmail.com  Sun Feb 26 13:35:49 2006
From: fabio.pliger at gmail.com (Mr BigSmoke)
Date: 26 Feb 2006 10:35:49 -0800
Subject: including directories with py2exe
Message-ID: <1140978949.134275.226950@t39g2000cwt.googlegroups.com>

Hi All
how do i include directories into my project when using py2exe? I have
a module that has it's images directory and when it's searches it (into
../dist/library.zip/.../mymodule/) it generates an error because the
directory wasn't imported...
tnx

Fabio



From brandon.mcginty at gmail.com  Fri Feb 24 21:51:44 2006
From: brandon.mcginty at gmail.com (brandon.mcginty at gmail.com)
Date: Fri, 24 Feb 2006 19:51:44 -0700
Subject: webmail-SquirrelMail Fetcher In Python
Message-ID: <00f701c639b6$6acbf3a0$6400a8c0@D1FWTS61>

Hi all,
I've been looking on the net for a program to gather e-mails from the
squirrelmail interface, and haven't found any.
My office only allows me to get e-mail access via webmail, at least when I'm
outside of the corperate network.
I'm wondering if anyone's found something like the screen-scrapers made for
the webmail system for MSOutlook, or another, farely simple, program that I
could edit to work with squirrelmail?
Sorry if I'm posting incorrectly or anything.
Also, I'm still a noob at python, so please go easy on me if this is very
obvious.

Thanks,
Brandon McGinty
Brandon.mcginty at gmail.com

-- 
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.375 / Virus Database: 268.1.0/269 - Release Date: 2/24/2006
 



From universal_used at hotmail.com  Wed Feb 22 13:23:32 2006
From: universal_used at hotmail.com (questions?)
Date: 22 Feb 2006 10:23:32 -0800
Subject: graph display(please help)
Message-ID: <1140632612.736499.320330@g47g2000cwa.googlegroups.com>

I heard from my friend who used to program in JAVA, it is really easy
to do graph display in JAVA.

I wonder whether there are similiar packages in Python I can use. Since
I know a little bit Python syntax  already, I can easily learn more in
Python.

I want to display connected graph(directed or undirected, most often
trees) with coloring on them.

Thanks for any suggestions!!!



From roy at panix.com  Sun Feb 19 08:08:42 2006
From: roy at panix.com (Roy Smith)
Date: Sun, 19 Feb 2006 08:08:42 -0500
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
Message-ID: <roy-36D3DC.08084219022006@reader2.panix.com>

DH <no at spam.com> wrote:
> -python has true closures (although nothing like ruby's blocks)

What is a "true closure"?  Or, maybe what I'm asking is what kind of 
closure wouldn't be a true closure?  Is there some kind of ersatz closure 
other language try to pass off, in violation of truth in closure laws?


From http  Sat Feb 25 08:20:47 2006
From: http (Paul Rubin)
Date: 25 Feb 2006 05:20:47 -0800
Subject: Import in a separate thread
References: <1140869286.548125.17710@p10g2000cwp.googlegroups.com>
	<mailman.2426.1140871920.27775.python-list@python.org>
Message-ID: <7xirr3shg0.fsf@ruckus.brouhaha.com>

Peter Hansen <peter at engcorp.com> writes:
> Sounds like premature optimization.  Speed "things" up?  What things?
> How long is it taking now to load the modules you are loading?  Even
> the wxPython demo takes only a few seconds to load on a decent
> machine, and that's loading a *heck* of a lot of stuff.  

I know that whenever I start IDLE and it's not already cached, it
takes a significant amount of time, and that doesn't even use
wxPython.


From kermit at polaris.net  Sat Feb 18 17:31:21 2006
From: kermit at polaris.net (Kermit Rose)
Date: Sat, 18 Feb 2006 17:31:21 -0500 (Eastern Standard Time)
Subject: 2-dimensional data structures
References: <45pk2dF7o7egU1@individual.net>
Message-ID: <43F7A039.000001.02380@YOUR-4105E587B6>



 

From: anthonyberet

Date: 02/18/06 17:11:01

To: python-list at python.org

Subject: Re: 2-dimensional data structures

 

 

I am not sure how to most efficiently identify which region any given

square on the grid is actually in - any thoughts, for those that have

done this? - I don't want a massive list of IF conditionals if I can

avoid it.

 

 

Kermit says:



There is a MUCH more efficient way to do this!



If you are doing a  9 by 9  soduku,



Each row and column has exactly the digits 1 through 9



Think of your data as being in a list 81 cells long that is accessed 3
different ways.



As a 9 by 9,  row wise,



As a 9 by 9  column wise



As a 3 by 3 by 9  where the first two subscripts identify the region, and
the last identify one of

the 9 values within the region.





And ,  most important,



To search for a value not yet in a row, column, or region,



Define holding list of length 9.



Suppose a  row has 4,2,8 in it,



and the corresponding column has 2,3,1 in it



and the correspond region has 2,  7, 6 in it.



Then you  initialize your hold vector to -1,



and set



hold(4) = 4

hold(2) = 1

hold(8) = 1

hold(2) = 1

hold (3) = 1

hold(1) = 1

hold(2) = 1

hold(7) = 1

hold(6) = 1



Then by scaning only the nine elements of hold, you see that



hold(5) = -1, , and hold(9) = -1  are the only values not  reset, and 



only  5 and 9 are possible choices for the  target cell.
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From fabioz at esss.com.br  Wed Feb  1 10:57:26 2006
From: fabioz at esss.com.br (Fabio Zadrozny)
Date: Wed, 01 Feb 2006 13:57:26 -0200
Subject: howto catch an Exception and still print the TraceBack?
In-Reply-To: <43e073bd$0$341$5fc30a8@news.tiscali.it>
References: <43e073bd$0$341$5fc30a8@news.tiscali.it>
Message-ID: <43E0DA66.5060000@esss.com.br>

I find the following very good for most needs:

try:
    raise RuntimeError('err')
except:
    import traceback;traceback.print_exc()

-- if you use Pydev, there's a template for that called printexc.

Cheers,

Fabio

Saizan wrote:

>In an event-driven application i'd like to keep the program alive regardless of any exceptions raised by the handlers,
>but still be able to debug them by reading the appropriate TraceBack from stderr.
>I can put something like:
>
>try:
>	self.call_handler(handler,*args)
>except Exception, e:
>	print e
>	print e.args
>
>in the dispatcher, but that isn't as helpful as a complete TraceBack.
>  
>




From iainking at gmail.com  Wed Feb 22 08:53:19 2006
From: iainking at gmail.com (Iain King)
Date: 22 Feb 2006 05:53:19 -0800
Subject: Python CGI not working in Firefox but does in IE
In-Reply-To: <1140615651.847586.258300@f14g2000cwb.googlegroups.com>
References: <1140615651.847586.258300@f14g2000cwb.googlegroups.com>
Message-ID: <1140616398.977605.104440@g14g2000cwa.googlegroups.com>


Harlin Seritt wrote:
> I have this Python CGI script running:
>
> [CODE]
> print 'Content-type: text/plain\n'
>
> location = 'http://server1.com'
>
> page = '''
> <html>
> <head>
> <meta http-equiv="Refresh" content="0; URL='''+location+'''">
> </head>
> <body></body>
> </html>'''
>
> print page
> [/CODE]
>
> It works fine and redirects perfectly when using Internet Explorer but
> only shows this in a Firefox window:
>
> [OUTPUT]
> <html>
> <head>
> <meta http-equiv="Refresh" content="0; URL=http://server1.com">
> </head>
> </html>
> [/OUTPUT]
>
> Is there anything I can do to fix this?
>
> Also, is there a redirect command somewhere within Python CGI that can
> get this done instead as I would actually prefer to have the CGI code
> execute this rather than depend on the HTML to do it.
>
> Thanks,
>
> Harlin Seritt

this snippet works (from code I wrote to implement a shoutbox):

print '''<html>
<head>
	<meta http-equiv="refresh" content="0;URL='''+HOME+'''" />
</head>
<body>
<p>Please wait...</p>
</body>
</html>'''

I assume your version doesn't work because of the uppercase 'R'.

Iain



From kxroberto at googlemail.com  Sun Feb 12 15:14:38 2006
From: kxroberto at googlemail.com (Robert)
Date: Sun, 12 Feb 2006 21:14:38 +0100
Subject: Ruby/Python Continuations: Turning a block callback into a
	read()-method ?
Message-ID: <dso4vi$2ndu$1@ulysses.news.tiscali.de>

After failing on a yield/iterator-continuation problem in Python (see
below) I tried the Ruby (1.8.2) language first time on that construct:
The example tries to convert a block callback interface
(Net::FTP.retrbinary) into a read()-like iterator function in order to
virtualize the existing FTP class as kind of file system.  4 bytes max
per read in this first simple test below. But it fails on the second
continuation with ThreadError after this second continuation really
executing!? Any ideas how to make this work/correct?

(The question is not about the specific FTP example as it - e.g. about a
rewrite of FTP/retrbinary or use of OS tricks, real threads with polling
etc... - but about the continuation language trick to get the execution
flow right in order to turn any callback interface into an "enslaved
callable iterator". Python can do such things in simple situations with
yield-generator functions/iter.next()... But Python obviously fails by a
hair when there is a function-context barrier for "yield". Ruby's
block-yield-mechanism seems to not at all have the power of real
generator-continuation as in Python, but in principle only to be that 
what a normal callback would be in Python. Yet "callcc" seemes to be 
promising - I thought so far :-(  )

=== Ruby callcc Pattern : execution fails with ThreadError!? ===========
require 'net/ftp'
module Net

class FTPFile
   def initialize(ftp,path)
      @ftp = ftp
      @path=path
      @flag=true
      @iter=nil
   end
   def read
      if @iter
         puts "@iter.call"
         @iter.call
      else
         puts "RETR "+ at path
         @ftp.retrbinary("RETR "+ at path,4) do |block|
            print "CALLBACK ",block,"\n"
            callcc{|@iter| @flag=true}
            if @flag
               @flag=false
               return block
            end
         end
      end
   end
end

end

ftp = Net::FTP.new("localhost",'user','pass')
ff  = Net::FTPFile.new(ftp,'data.txt')
puts ff.read()
puts ff.read()

=== Output/Error ====

vs:~/test$ ruby ftpfile.rb
RETR data.txt
CALLBACK robe
robe
@iter.call
CALLBACK rt

/usr/lib/ruby/1.8/monitor.rb:259:in `mon_check_owner': current thread
not owner (ThreadError)
         from /usr/lib/ruby/1.8/monitor.rb:211:in `mon_exit'
         from /usr/lib/ruby/1.8/monitor.rb:231:in `synchronize'
         from /usr/lib/ruby/1.8/net/ftp.rb:399:in `retrbinary'
         from ftpfile.rb:17:in `read'
         from ftpfile.rb:33
vs:~/test$

===  Python Pattern : I cannot write down the idea because of a barrier ===

#### I tried a pattern like:
     ....
     def open(self,ftppath,mode='rb'):
         class FTPFile:
             ...
             def iter_retr()
                 ...
                 def callback(blk):
                     how-to-yield-from-here-as-iter_retr blk???
                 self.ftp.retrbinary("RETR %s" % self.relpath,callback)
             def read(self, bytes=-1):
                 ...
                 self.buf+=self.iter.next()
                 ...
             ...
         ....

=====


Robert



From vivainio at gmail.com  Thu Feb 16 14:02:31 2006
From: vivainio at gmail.com (vivainio at gmail.com)
Date: 16 Feb 2006 11:02:31 -0800
Subject: Evil, evil wxPython (and a glimmer of hope)
Message-ID: <1140116551.116322.12680@g43g2000cwa.googlegroups.com>

I rarely do GUIs, and reminded myself today why that is the case
(simply, it's not fun).

I implemented a simple TreeCtrl, and had to implement my own 'children'
method, of all things!

Here it is:

    def children(self,node):
        c = []
        nc,cookie = self.GetFirstChild(node)
        while 1:
            info = self.GetItemText(nc)
            c.append((info,nc))

            nc, cookie= self.GetNextChild(node,cookie)
            if not nc.IsOk():
                break

        return c


And it even fails with zero children. This is as unpythonic as it gets.

However, it should be pretty easy to write small wrapper over the
wxPython api. I'm thinking of wrapping or injecting additional methods
to TreeCtrl that start with lowercase letters and return something
sensible, with reasonable methods. Something like:

root = self.AddRoot("root dir") # root is normal wx TreeCtrl root
tree = EasyWx(root)   # now tree is our wrapped, more "fun" root
for c in tree.children():
  print c.name

# etc. etc.

This is a bit like Brian Orendorff's "path" module that turns something
low level to something you can use easily, without throwing you into a
world of "frameworks", toolkits and whatnot. I can see there are things
like Wax or PythonCard, but they are still too "frameworky", and you
don't use them to extend wxPython, you use *them* and they use
wxPython. I'd basically like to rely on something that is there for the
long haul (plain wxPython API) but only use convenience wrappers *on my
own initiative*, as it seems convenient. Just like I'd use the "path"
module.

wxPython is great as it is (a simple wrapper for a C++ toolkit) and the
basic design is ok & proven, I'm just too lazy to use it in its current
form.



From tim.hochberg at ieee.org  Tue Feb 14 00:26:30 2006
From: tim.hochberg at ieee.org (Tim Hochberg)
Date: Mon, 13 Feb 2006 22:26:30 -0700
Subject: how do you pronounce 'tuple'?
In-Reply-To: <cLmdnXLWG5y3_mzenZ2dnUVZ_tmdnZ2d@speakeasy.net>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>	<mailman.1857.1139863723.27775.python-list@python.org>	<Wj6If.1606$No6.38150@news.tufts.edu>
	<dsqtq7$mju$1@online.de>	<ieGdnfpVlNsJ3WzenZ2dnUVZ_t2dnZ2d@speakeasy.net>	<roy-E3EB19.22040713022006@reader2.panix.com>
	<cLmdnXLWG5y3_mzenZ2dnUVZ_tmdnZ2d@speakeasy.net>
Message-ID: <dsrpme$161$1@sea.gmane.org>

Erik Max Francis wrote:
> Roy Smith wrote:
> 
> 
>>A more interesting question is what do you call ()?  A none-tuple?
> 
> 
> Yeah, that's at the point where it _really_ departs from anything 
> remotely mathematical.  Don't think I've ever heard the occasion to talk 
> about 0-tuples in any context, though, so I don't think it's something 
> we need to worry about.  I'm sure you'd just call them "empty tuples" or 
> "0-tuples" and move on :-).
> 

There's only one tuple of length zero, so I just call it "Spot".

 >>> a = ()
 >>> b = ()
 >>> a is b
True



From irvine.david at gmail.com  Wed Feb  8 18:48:19 2006
From: irvine.david at gmail.com (dirvine)
Date: 8 Feb 2006 15:48:19 -0800
Subject: by reference
Message-ID: <1139442499.913588.89620@g14g2000cwa.googlegroups.com>

I would like to create a dictionary based on a variable i.e read a
bunch of filenames and create a dict for each one called the filename
filename={}
to get the filenames I trraverse teh dirs woth os.path.walk or similar

Sorry I'm a bit new to python



From george.sakkis at gmail.com  Tue Feb  7 13:57:18 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 7 Feb 2006 10:57:18 -0800
Subject: Is Python good for web crawlers?
Message-ID: <1139338638.219672.170230@z14g2000cwz.googlegroups.com>

You may want to start from HarvestMan:

http://harvestman.freezope.org/

George



From mystilleef at gmail.com  Mon Feb 20 05:02:50 2006
From: mystilleef at gmail.com (Mystilleef)
Date: 20 Feb 2006 02:02:50 -0800
Subject: editor for Python on Linux
In-Reply-To: <dtai6e$23m$2@ariane.blic.net>
References: <dtai6e$23m$2@ariane.blic.net>
Message-ID: <1140429770.145880.280300@g43g2000cwa.googlegroups.com>

I'm writing a simple yet powerful text editor for GNOME that is great
for Python development called Scribes. It features

Snippets (ala Textmate/Eclipse)
Automatic word completion
Automatic indentation
Automatic bracket completion
Automatic saving
Bookmarks
Syntax Highlight
etc..

Flash Movie: http://scribes.sf.net/snippets.htm

Gif Screencast: http://www.minds.may.ie/~dez/images/blog/scribes.html

Hompage: http://scribes.sf.net/

It's faster, lighter, simpler and as powerful than the alternatives,
and most important it never gets in your way and you would never need
to decipher cryptic manuals to do anything moderately productive,
unlike some other editors. It's free software too, give it a try. As a
bonus, it's written in Python.



From elim.qiu at gmail.com  Thu Feb  2 11:53:14 2006
From: elim.qiu at gmail.com (YL)
Date: 2 Feb 2006 08:53:14 -0800
Subject: perform dynamic tasks for C/C++/ObjC programs
Message-ID: <1138899194.934523.147940@g44g2000cwa.googlegroups.com>

I'm working on an expert system that allows dynamic updating of
expert's knowledge and logics. I use database to store the info about
how to evaluate user's responses to questionnaires. The core table
called EvaluationPoint whose records have
attributes(evaluation_point_id,questionnaire_id,pattern_id,config,status,...)

Once a record in table EvaluationPoint been fetched, it becomes an
object of class EvaluationPoint with virtual sub-type according to its
pattern specified by pattern_id. Where certain evaluation
pattern/procedure is defined (EvaluationPattern data are also
persistently stored in database for runtime management).

Each instance of EvaluationPoint's config value contains the parameters
etc. necessary to obtain the exact logic/procedure from its pattern.
EvaluationPoint and EvaluationPattern are managed by people who have
certain participations to the system and data.

My app is writtern in ObjC running on win2k. As compiled language,
there are limited flexibilities to handle dynamic logics/procedures. So
I'm thinking about store python code in my config value of
EvaluationPoint records whenever needed, and let python handle the
dynamic behavior of evaluationPoints.

I don't know if this make sense at all but if you have ideas or
examples about how to interact python from within C/C++/ObjC, please
advise me. Thanks a lot!



From gene.tani at gmail.com  Mon Feb 27 02:21:08 2006
From: gene.tani at gmail.com (gene tani)
Date: 26 Feb 2006 23:21:08 -0800
Subject: Python Indentation Problems
In-Reply-To: <1141021286.047172.278030@z34g2000cwc.googlegroups.com>
References: <1141021286.047172.278030@z34g2000cwc.googlegroups.com>
Message-ID: <1141024868.067314.41680@u72g2000cwu.googlegroups.com>


diffuser78 at gmail.com wrote:
> I am a newbie to Python. I am mainly using Eric as the IDE for coding.
> Also, using VIM and gedit sometimes.
>
> I had this wierd problem of indentation. My code was 100% right but it
> wont run because indentation was not right. I checked time and again
> but still no success. I rewrote the code over again in VI and it ran.
>
> Can you please explain whats the trick behind the correct indentation.
>

These aren't really tricks or secrets:

http://www.python.org/doc/essays/styleguide.html
http://www.logilab.org/projects/pylint/documentation

Different editors, e.g. komodo and textmate, let you look at tabs and
spaces graphically
And avoid pasting other peoples' code into your modules.  Keep them in
separate modules



From attila.rajmund.nohl at ericsson.com  Wed Feb  8 12:10:33 2006
From: attila.rajmund.nohl at ericsson.com (Attila Rajmund Nohl)
Date: Wed, 8 Feb 2006 17:10:33 +0000 (UTC)
Subject: Omniorb event channel question
References: <drnvli$9cu$1@news.al.sw.ericsson.se>
	<449emmF12ugrU1@uni-berlin.de>
Message-ID: <dsd8m9$lia$1@news.al.sw.ericsson.se>

Diez B. Roggisch <deets at nospam.web.de> wrote:
>> channel = orb.getRootInterface(channelname)
>> chadmin = channel.for_consumers()
>> supplier = chadmin.obtain_push_supplier()
>> listener = EventListener()
>> supplier.connect_push_consumer(listener)
> 
> Not sure, but I guess you want a 
> 
> listener._this()
> 
> here.

That worked, thanks. However, the event receiving doesn't seem to work.
I've started the ORB with
corba.orb.run()

but the push() method of the EventListener object doesn't get called (or
at least the print() calls in the method are not executed) and the event
sender program is blocked in the push() call. Do I need something else
to set up?
				Bye,NAR


From bonono at gmail.com  Fri Feb 10 18:53:09 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 10 Feb 2006 15:53:09 -0800
Subject: ordered sets operations on lists..
In-Reply-To: <1139599834.975607.77180@f14g2000cwb.googlegroups.com>
References: <mailman.1722.1139590689.27775.python-list@python.org>
	<1139592166.993686.212000@f14g2000cwb.googlegroups.com>
	<1139599834.975607.77180@f14g2000cwb.googlegroups.com>
Message-ID: <1139615589.390705.16860@z14g2000cwz.googlegroups.com>


Raymond Hettinger wrote:
> The intersection step is unnecessary, so the answer can be simplified a
> bit:
>
> >>> filter(set(l2).__contains__, l1)
> [5, 3]
> >>> filter(set(l1).__contains__, l2)
> [3, 5]

stand corrected.



From napobo3 at gmail.com  Thu Feb 23 02:24:17 2006
From: napobo3 at gmail.com (napobo3)
Date: 22 Feb 2006 23:24:17 -0800
Subject: Python 2.4.2 Solaris packages
Message-ID: <1140679457.773939.77270@o13g2000cwo.googlegroups.com>

I've build the Python 2.4.2 Solaris packages for x86 and sparc
architectures
http://napobo3.blogspot.com/2006/02/sunwpython-242-for-solaris.html
You're welcome to download them.

-- Leon



From sybrenUSE at YOURthirdtower.com.imagination  Fri Feb 17 19:37:24 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Sat, 18 Feb 2006 01:37:24 +0100
Subject: Simple question about freeze
References: <1140193845.660117.302750@g43g2000cwa.googlegroups.com>
	<43F644EC.6000303@v.loewis.de>
Message-ID: <slrndvcr25.91h.sybrenUSE@schuimige.unrealtower.org>

Martin v. L?wis enlightened us with:
> No. You also need to provide static versions of all system
> libraries.

You can also ship the required .so files along with the program, and
set LD_LIBRARY_PATH to include the directory in which you stored those
files. This can be easily done by a shell script that sets up the
environment variable and then runs the real program.

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From kent at kentsjohnson.com  Mon Feb  6 19:16:45 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Mon, 06 Feb 2006 19:16:45 -0500
Subject: a question regarding call-by-reference
In-Reply-To: <1139250105.744691.110440@o13g2000cwo.googlegroups.com>
References: <1139250105.744691.110440@o13g2000cwo.googlegroups.com>
Message-ID: <43e7e2bb$1_1@newspeer2.tds.net>

enjoying the view wrote:
> Imported normally this would work fine. The list given as a parameter
> would be one element larger. But when the stubs are generated, the
> function doesn't return anything and the list is appended in the server
> and the client-side list is left untouched. At first I thought the
> solution was easy, just return the changed parameters and place them in
> the parameter variables in the client stub:
> def add_elm(list):
>    send_message({'funcname': 'add_elm', 'args': (list)})
>    response = receive_message()
>    (list) = response.get('args')
>    return response.get('result')
> 
> The problem is, this doesn't work. The original list doesn't point to
> the changed list. I have been trying to figure this out and it seems
> that if I just assign to the list variable it just modifies the local
> (to the function) name space, and that those changes aren't reflected
> in the list in the original name space.

Try
   list[:] = response.get('args')
this will change the value of the list passed in.

Kent


From rupole at hotmail.com  Tue Feb 21 00:27:15 2006
From: rupole at hotmail.com (Roger Upole)
Date: Tue, 21 Feb 2006 00:27:15 -0500
Subject: Print a PDF transparently
References: <1140184955.674138.275010@o13g2000cwo.googlegroups.com>
	<11vbpu58sll1b4f@corp.supernews.com>
	<1140190758.951694.231890@f14g2000cwb.googlegroups.com>
	<fk0cv159vg81i62524nvpuueg8q7iorcnk@4ax.com>
	<1140202841.650774.32920@z14g2000cwz.googlegroups.com>
	<1140223510.666168.183030@z14g2000cwz.googlegroups.com>
	<1140441655.077989.221240@f14g2000cwb.googlegroups.com>
Message-ID: <1140499660_549@sp6iad.superfeed.net>

This seems to work ok with acrobat 7  (don't know if it will work
with earlier versions).  The only thing I had to tweak was
acrobat's security setting for allowing print via script operations.
I didn't try to figure out how to wait until the print was finished.

      hth
            Roger


import win32com.client, time
ie = win32com.client.Dispatch('InternetExplorer.Application')
## ie.Visible=1
ie.Navigate('somedocument.pdf')
while ie.Busy:
    time.sleep(1)
ie.Document.printPages(1,3)

"Daniel Crespo" <dcrespo at gmail.com> wrote in message news:1140441655.077989.221240 at f14g2000cwb.googlegroups.com...
>> Have you seen this?
>>     http://tgolden.sc.sabren.com/python/win32_how_do_i/print.html
>> In particular, the section on using win32print directly.
>
> Yes, I have. The problems is that an external program is launched for
> handling the file and print it. In the case of PDF, acrobat is
> launched. In the case of PS, Ghostview is launched. When printing a
> PDF, acrobat keeps alive, so the user has to close it manually. On the
> other hand, Ghostview is opened, prints the file and closes
> automatically. The last one is which I find the best for me, until now,
> (because the Ghostview closes automatically). If I decide to go this
> way, my problem then is to transform a pdf to ps, or generate a ps
> directly.
>
> For further information on what I want, please, refer to my first two
> posts in this topic.
>
> Any other help?
>
> Thank you very much
> 



----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----


From olanglois at quazal.com  Fri Feb 24 18:10:43 2006
From: olanglois at quazal.com (Olivier Langlois)
Date: Fri, 24 Feb 2006 18:10:43 -0500
Subject: Optimize flag question
Message-ID: <400BDC416E2A0042AA35DF3919BB8A5115E147@mail.mtl.proksim.com>

Hi,

 

This is my first post on the list. I played with the -O flag option and
I found the hard way that it was breaking the scripts I am using because
they rely on the assert statement that the optimize flag remove. From
there, I tried to find more information on the effect that this flag has
on scripts but I have not found much...

 

So my question is: what are the 'optimizations' that the Python
interpreter is doing when you specify the optimize flag and is there
anything I should be cautious about when using it?

 

Thank you,

Olivier Langlois

http://www.quazal.com <http://www.quazal.com/> 

 

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From sjuranic at gmail.com  Mon Feb 27 18:17:11 2006
From: sjuranic at gmail.com (Steve Juranich)
Date: Mon, 27 Feb 2006 16:17:11 -0700
Subject: type = "instance" instead of "dict"
References: <1141069989.763239.191140@u72g2000cwu.googlegroups.com>
	<44035966$1_2@newspeer2.tds.net>
	<1141072746.685948.251040@j33g2000cwa.googlegroups.com>
	<440370ce$1_2@newspeer2.tds.net>
	<1141081177.003471.139820@t39g2000cwt.googlegroups.com>
Message-ID: <du019o$p5e$1@sea.gmane.org>

Cruella DeVille wrote:

> I created a class Dict (not dict), but since it only complicates things
> for me I implemented my program without it.
> 
> when I wrote myDictionary = dictionary.__dict__.iteritems() it worked
> better...
> what does the __dict__ mean?

This is something else entirely and almost *certainly* not what you want. 
Here's the skinny on how to subclass the built-in `dict' type.

class Dict(dict):
  # Your mods go here.

>From your earlier posts, it sounds like you've managed to get a
"classic" (i.e., old, almost deprecated) class.  Change your class
definition to look more like what I have above and things should start
working.

If you're willing to post the code, we could pinpoint the problems much
faster.

-- 
Steve Juranich
Tucson, AZ
USA



From harlinseritt at yahoo.com  Thu Feb 23 08:47:12 2006
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 23 Feb 2006 05:47:12 -0800
Subject: Get Root access in Linux?
References: <1140698762.654497.272490@o13g2000cwo.googlegroups.com>
	<465qp8F9hujdU1@uni-berlin.de>
Message-ID: <1140702432.302564.104270@g14g2000cwa.googlegroups.com>

sudo is something of a quick fix.

Harlin Seritt



From bob at passcal.nmt.edu  Fri Feb 10 12:50:53 2006
From: bob at passcal.nmt.edu (Bob Greschke)
Date: Fri, 10 Feb 2006 10:50:53 -0700
Subject: Tkinter, X-windows and ebay
References: <1tqdncP3Ps7s6XfenZ2dnUVZ_tGdnZ2d@nmt.edu>
	<3bidnfcf041EVXHeRVn-gA@nmt.edu>
	<7xacczt8u4.fsf@ruckus.brouhaha.com>
Message-ID: <vZKdnfz889_-T3HeRVn-tw@nmt.edu>


"Paul Rubin" <http://phr.cx at NOSPAM.invalid> wrote in message 
news:7xacczt8u4.fsf at ruckus.brouhaha.com...
> "Bob Greschke" <bob at passcal.nmt.edu> writes:
>> What I came up with was the user can just create a text file (a kind
>> of a transaction log of what things were done to the copy of the
>> database on his machine), then cut and paste that text into a window
>> created on their machine by the main database program (using
>> X-windows, ssh, etc.), then the main program can read the contents
>> of that text field and update the main copy of the database.
>>
>> It should work. :)
>
> Yuck!  Why not use an http interface instead of the remote tkinter
> interface?  Then the user would interact with your app through a web
> browser, giving a familiar UI as well as giving that upload button
> (which tells the browser to upload the file).

Mainly because the user may be in the middle of the Himalayas trying to 
create paperwork for equipment being shipped to Japan and Chile.  The 
Internet is not always an option in our line of work.  We need to have 
standalone everythings.  We don't live in your real world. :)

The two databases (the one on the user's laptop, and the one back at the 
office) don't need to be reconciled until the user gets back.  We just need 
to (eventually) know which pieces of equipment were sent to Japan, and which 
went to Chile.

Bob




From matt at pollenation.net  Thu Feb  9 06:55:27 2006
From: matt at pollenation.net (Matt Goodall)
Date: Thu, 09 Feb 2006 11:55:27 +0000
Subject: Twisted book opinions?
In-Reply-To: <c6ad9ed3d5279f24699b21f819438555@cogeco.ca>
References: <c6ad9ed3d5279f24699b21f819438555@cogeco.ca>
Message-ID: <43EB2DAF.3010402@pollenation.net>

Jay Parlar wrote:
> I was hoping to get some c.l.p. opinions on O'Reilly's new Twisted book.

I think it's a good book to get. I know a fair amount about Twisted but
it still made for interesting reading.

Tommi Virtanen (aka tv) posted a great review of the book shortly after
it was published. <http://tv.debian.net/articles/review-snakeball/>.

- Matt


From userprogoogle-139 at yahoo.co.uk  Tue Feb 14 10:14:05 2006
From: userprogoogle-139 at yahoo.co.uk (rodmc)
Date: 14 Feb 2006 07:14:05 -0800
Subject: Embedding an Application in a Web browser
Message-ID: <1139930045.408507.151440@g43g2000cwa.googlegroups.com>

Is it possible to embed a Python application within Internet explorer?
If so how do people recommend going about it.

As for the application it has to be able display simple animated
graphics such as circles, lines and squares. However if someone clicks
on a shape it should open up another application, such as Word.

Thanks,

Rod 

Python Newbie



From no at spam.com  Wed Feb  8 08:26:09 2006
From: no at spam.com (DH)
Date: Wed, 08 Feb 2006 07:26:09 -0600
Subject: Another try at Python's selfishness
In-Reply-To: <dscq68$ejc$1@news.al.sw.ericsson.se>
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<dscq68$ejc$1@news.al.sw.ericsson.se>
Message-ID: <CdadnavYLe_sbHTeRVn-ow@comcast.com>

Frithiof Andreas Jensen wrote:
> <n.estner at gmx.de> wrote in message
> news:1138918102.863033.298700 at o13g2000cwo.googlegroups.com...
>> Having read previous discussions on python-dev I think I'm not the only
>> Python programmer who doesn't particularly like python's "self"
>> parameter:
> 
> Ok, there might be five programmers and one imam. The imam does not like
> anything more recent than 700 A.D ...
> 


You Danes and your Muslim jokes :)


From skip at pobox.com  Mon Feb 13 22:01:22 2006
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 13 Feb 2006 21:01:22 -0600
Subject: Loop Backwards
In-Reply-To: <1139883877.323042.199040@o13g2000cwo.googlegroups.com>
References: <1139883877.323042.199040@o13g2000cwo.googlegroups.com>
Message-ID: <17393.18434.220310.595904@montanaro.dyndns.org>


    Dave> This should be simple, but I can't get it:
    Dave> How do you loop backwards through a list?

Standard idiom:

    for i in range(len(mylist)-1, -1, -1):
        do_stuff()

Contrast that with the standard forward loop:

    for i in range(len(mylist)):
        do_stuff()

So, to go backwards, just add "-1, -1, -1" to the range function in the
forward loop version.

Skip


From jimlewis at miclog.com  Sat Feb 11 11:58:55 2006
From: jimlewis at miclog.com (swisscheese)
Date: 11 Feb 2006 08:58:55 -0800
Subject: Shortest prime number program
References: <1139652226.869102.310180@g14g2000cwa.googlegroups.com>
	<1139673716.241461.84110@g47g2000cwa.googlegroups.com>
Message-ID: <1139677135.471361.241740@g14g2000cwa.googlegroups.com>

> [2]+[x for x in range(1,99) if 2**x%x==2]

42 - brilliant!
41:
[2]+[x for x in range(1,99)if 2**x%x==2]
... although it appears Christoph is right that it's not scalable.



From jzgoda at o2.usun.pl  Sun Feb 12 07:14:43 2006
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Sun, 12 Feb 2006 13:14:43 +0100
Subject: Is python very slow compared to C
In-Reply-To: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
Message-ID: <dsn8s5$p0c$1@atlantis.news.tpi.pl>

diffuser78 at gmail.com napisa?(a):

> I have just started to learn python. Some said that its slow. Can
> somebody pin point the issue.

So what? If you want fast code, go with assembly.

-- 
Jarek Zgoda
http://jpa.berlios.de/


From ejensen at visi.com  Thu Feb 23 12:23:15 2006
From: ejensen at visi.com (Ed Jensen)
Date: Thu, 23 Feb 2006 17:23:15 -0000
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<1140454473.335788@jetspin.drizzle.com>
	<pan.2006.02.20.21.59.12.636908@REMOVETHIScyber.com.au>
	<1140490302.639049@jetspin.drizzle.com>
	<mailman.2231.1140532613.27775.python-list@python.org>
	<1140539404.440390.172350@g44g2000cwa.googlegroups.com>
	<4866bea60602210948x10bff91elbff376bc8ec116f8@mail.gmail.com>
	<mailman.2277.1140569863.27775.python-list@python.org>
	<roy-320C26.17512522022006@reader2.panix.com>
Message-ID: <11vrrs3cv4abc98@corp.supernews.com>

Roy Smith <roy at panix.com> wrote:
> BTW, if like Python and haven't looked at Ruby, it's worth a glance.  If 
> Python can be called similar to Lisp, then Ruby is even more so.  I'm not 
> fond of Ruby's perlesqe syntax, but I like many of the fundamental ideas.

I can't get over Ruby's ugly syntax.  :(

Long live Python!  :)


From franz.steinhaeusler at gmx.at  Thu Feb 23 08:46:20 2006
From: franz.steinhaeusler at gmx.at (Franz Steinhaeusler)
Date: Thu, 23 Feb 2006 14:46:20 +0100
Subject: regular expresson for Unix and Dos Lineendings wanted
Message-ID: <jterv157550g4qd4rosc3a2o8l69gcau8v@4ax.com>

Hello, I need a regularexpression, which trims trailing whitespaces.

While with unix line endings, it works; 
but not with Window (Dos) CRLF's:

>>> import re
>>> retrailingwhitespace = re.compile('(?<=\S)[ \t]+$', re.MULTILINE)

1) Windows
>>> r="erewr    \r\nafjdskl     "
>>> newtext, n = retrailingwhitespace.subn('', r)
>>> n
1
>>> newtext
'erewr    \r\nafjdskl'

2) Unix
>>> r="erewr    \nafjdskl     "
>>> newtext, n = retrailingwhitespace.subn('', r)
>>> n
2
>>> newtext
'erewr\nafjdskl'
>>> 

Who can help me (regular expression, which works for both cases).

Thank you in advance!
-- 
Franz Steinhaeusler


From steve at REMOVETHIScyber.com.au  Fri Feb 24 04:51:54 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 24 Feb 2006 20:51:54 +1100
Subject: spaces at ends of filenames or directory names on Win32
References: <dtkuav$keb$1@solaris.cc.vt.edu> <43FE1B5E.8060009@websafe.com>
	<pan.2006.02.23.22.22.17.122779@REMOVETHIScyber.com.au>
	<U5adnSstztOb12PenZ2dnUVZ_sOdnZ2d@comcast.com>
Message-ID: <pan.2006.02.24.09.51.53.454797@REMOVETHIScyber.com.au>

On Thu, 23 Feb 2006 17:49:31 -0600, Larry Bates wrote:

> Steven D'Aprano wrote:
>> On Thu, 23 Feb 2006 14:30:22 -0600, Larry Bates wrote:
>> 
>>> How about not naming files with leading and trailing spaces on
>>> the Mac?  Seems like a bad habit that needs breaking ;-).
>> 
>> Why is it a bad habit? Because *Windows* is primitive enough that it can't
>> cope with leading and trailing spaces? I don't see why Windows' lack is
>> Mac users' problem.
>> 
>> 
> It is a problem because the poster says it is a problem for him.

Absolutely.

Now read my statement again. Why is it a problem for the Mac _users_?

I use Linux, Windows and Mac, in varying amounts. I'm fully aware of the
problems of transferring files from one platform to another. When it
affects _me_, I may choose to dumb down to the lowest common denominator
so as to save _me_ problems. But wearing my user hat, if a developer came
to me telling me I had to avoid using features on my platform of choice in
order to make his life easier, I'd say to him "So why exactly are we
paying you the big bucks? That's your problem, you solve it."



-- 
Steven.



From haxier at gmail.com  Tue Feb 28 15:33:01 2006
From: haxier at gmail.com (haxier)
Date: 28 Feb 2006 12:33:01 -0800
Subject: Firebird and Python
In-Reply-To: <440456C9.4080604@freenet.de>
References: <1140716394.225560.27920@t39g2000cwt.googlegroups.com>
	<mailman.2364.1140721473.27775.python-list@python.org>
	<1140727082.800917.44550@i40g2000cwc.googlegroups.com>
	<dtmk8t$an9$1@wake.carmen.se>
	<mailman.2392.1140782962.27775.python-list@python.org>
	<dtni65$dnv$1@wake.carmen.se> <dtno33$qbk$1@nemesis.news.tpi.pl>
	<dtv83h$t52$1@wake.carmen.se>
	<mailman.2491.1141079616.27775.python-list@python.org>
	<440456C9.4080604@freenet.de>
Message-ID: <1141158781.266021.319020@z34g2000cwc.googlegroups.com>

All the info you need is in the kinterbasdb module. I've worked with it
under windows and Linux and... "it just works". Really well indeed. I'd
recommend it a lot.

http://kinterbasdb.sourceforge.net/dist_docs/usage.html#faq_fep_embedded_using_with

--
Asier.



From bignose+hates-spam at benfinney.id.au  Mon Feb 27 20:22:55 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 28 Feb 2006 12:22:55 +1100
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<mailman.2474.1141050152.27775.python-list@python.org>
Message-ID: <877j7gxonk.fsf@rose.polar.local>

Tim Chase <python.list at tim.thechases.com> writes:
> Just a couple thoughts:

Appreciated.

>> An enumeration is an exclusive set of symbolic names bound
>> to arbitrary unique values.
>
> Uniqueness imposes an odd constraint that you can't have synonyms in
> the set:
>
>  >>> shades = enum({white:100, grey:50, gray:50, black:0})

I think a dict is best used for this purpose. An enumeration is for
when you want all the values in the collection to be unique, but don't
care particularly what those values *are*.

>  >     >>> Grades = enum('A', 'B', 'C', 'D', 'F')
>
> This produces the counter-intuitive result of
>
> 	>>> Grades.A > Grades.B
> 	False
>
> Sure, one can bung with it and create the set of grades backwards,
> but then iteration becomes weird.  Perhaps the ability to override
> the comparitor?

Again, if you actually want specific values associated with each
member of the collection, I think a dict is best.

Note that the enumeration values *can* be dict keys, so you could
associate the values with other objects that way.

-- 
 \           "I was in a bar the other night, hopping from barstool to |
  `\     barstool, trying to get lucky, but there wasn't any gum under |
_o__)                                    any of them."  -- Emo Philips |
Ben Finney


From wolfgang.lipp at gmail.com  Fri Feb  3 09:37:12 2006
From: wolfgang.lipp at gmail.com (wolfgang.lipp at gmail.com)
Date: 3 Feb 2006 06:37:12 -0800
Subject: web.py + cheetah delivering incomplete pages
Message-ID: <1138977432.206287.16130@g47g2000cwa.googlegroups.com>

hi,

yesterday i started with web.py / flup / cheetah, and managed to get a
first webpage to diaplay on my windows box running apache.
unfortunately, the following code

import web


urls = (
  '(.*)', 'view'
)

class view:
    def GET( self, name ):
        web.render( 'view.html' )
        web.internalerror = web.debugerror

if __name__ == '__main__':

    web.run( urls )

using this template, view.html:

<div>
#if $name
    I just wanted to say hello to $name.
#else
    Hello, world!
#end if
</div>

#set $ninetyNine = 99

#for $count in $range($ninetyNine, 0, -1)
<div>$count</div>
#end for

<h1>finis.</h1>

will never print out the finis line -- it always stops short of that,
displaying a 7 at the bottom of the page. it is tho the last few lines
end up in a buffer and get see the light of day. any ideas?

_wolf



From thattommyhall at gmail.com  Sat Feb 25 10:31:57 2006
From: thattommyhall at gmail.com (thattommyhallll@gmail.com)
Date: 25 Feb 2006 07:31:57 -0800
Subject: Is Python a Zen language?
In-Reply-To: <1hbazbd.y2orw21xrsqyN%aleaxit@yahoo.com>
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
	<1hbazbd.y2orw21xrsqyN%aleaxit@yahoo.com>
Message-ID: <1140881517.430420.192270@u72g2000cwu.googlegroups.com>

GEB perhaps?



From fuzzyman at gmail.com  Tue Feb  7 04:23:29 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 7 Feb 2006 01:23:29 -0800
Subject: UTF16, BOM, and Windows Line endings
In-Reply-To: <X5SFf.245339$V7.151952@news-server.bigpond.net.au>
References: <1139224580.820529.198120@z14g2000cwz.googlegroups.com>
	<SXPFf.245245$V7.89096@news-server.bigpond.net.au>
	<1139265255.239649.10100@g47g2000cwa.googlegroups.com>
	<X5SFf.245339$V7.151952@news-server.bigpond.net.au>
Message-ID: <1139304209.039549.206420@f14g2000cwb.googlegroups.com>


Neil Hodgson wrote:
> Fuzzyman:
>
> > Thanks - so I need to decode to unicode and *then* split on line
> > endings. Problem is, that means I can't use Python to handle line
> > endings where I don't know the encoding in advance.
> >
> > In another thread I've posted a small function that *guesses* line
> > endings in use.
>
>     You can normalise line endings:
>
>  >>> x = "a\r\nb\rc\nd\n\re"
>  >>> y = x.replace("\r\n", "\n").replace("\r","\n")
>  >>> y
> 'a\nb\nc\nd\n\ne'
>  >>> print y
> a
> b
> c
> d
>
> e
>
>     The empty line is because "\n\r" is 2 line ends.
>

Thanks - that works, but replaces *all* instances of '\r' to '\n' -
even if they aren't used as line terminators. (Unlikely perhaps). It
also doesn't tell me what line ending was used.

Apparently files opened in universal mode - 'rU' - have a  newline
attribute. That makes it a bit easier. :-)

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml 


>     Neil



From scott.daniels at acm.org  Sat Feb 25 20:29:34 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sat, 25 Feb 2006 17:29:34 -0800
Subject: Path (graph) shower utility
In-Reply-To: <1140894665.613159.148960@j33g2000cwa.googlegroups.com>
References: <mailman.2338.1140685468.27775.python-list@python.org>
	<slrne01a6j.2t1.grahn+nntp@frailea.sa.invalid>
	<1140894665.613159.148960@j33g2000cwa.googlegroups.com>
Message-ID: <440102cd$1@nntp0.pdx.net>

bearophileHUGS at lycos.com wrote:
> Thank you Jorgen, now I understand the question, and the answer isn't
> difficult :-)
> 
> Graphviz is good enough for this purpose.
> 
>> but IIRC there are Python bindings for it as well.<
> ...
> There are other libs around, I have seen a new one quite recently.

Perhaps that one was:

Yapgvb,
     a Python wrapper around the AT&T's graph layout library Graphviz.

URL:   http://yapgvb.sourceforge.net

--Scott David Daniels
scott.daniels at acm.org


From claudio.grondi at freenet.de  Sat Feb 18 08:27:31 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Sat, 18 Feb 2006 14:27:31 +0100
Subject: [ANN] Movable python Trial Version
In-Reply-To: <mailman.2091.1140266787.27775.python-list@python.org>
References: <1140265482.657543.193060@z14g2000cwz.googlegroups.com>
	<mailman.2091.1140266787.27775.python-list@python.org>
Message-ID: <dt77c4$3m6$1@newsreader3.netcologne.de>

Felipe Almeida Lessa wrote:
> Em S?b, 2006-02-18 ?s 04:24 -0800, Fuzzyman escreveu:
> 
>>It is set to expire on the 22nd May, and displays a nag screen on
>>startup. Other than that, it is the full version. Have fun.
> 
> 
> Attached is the cracked version with no expiration limit and my own
> bitmap on the startup. Enjoy!
> 
> 
>>Fuzzyman
>>http://www.voidspace.org.uk/python/index.shtml
> 
> 
> Just kidding ;-),
> Felipe.
To make it really funny, just beware from sending me the appropriate 
link to my personal email address ;-) .

Claudio


From fredrik at pythonware.com  Tue Feb 28 09:40:14 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 28 Feb 2006 15:40:14 +0100
Subject: error: argument after ** must be a dictionary
References: <1141136634.030745.256120@e56g2000cwe.googlegroups.com>
Message-ID: <du1nce$pqk$1@sea.gmane.org>

"abcd" <codecraig at gmail.com> wrote:

>I have class like this...
>
> import threading
> class MyBlah(object):
>    def __init__(self):
>        self.makeThread(self.blah, (4,9))
>
>    def blah(self, x, y):
>        print "X and Y:", x, y
>
>    def makeThread(self, func, args=(), kwargs={}):
>        threading.Thread(target=self.blah, args=args,
> kwargs=kwargs).start()
>
> When I do...
> b = MyBlah()
>
> I am getting this error:
> TypeError:  MyBlah object argument after ** must be a dictionary

I'm getting

    X and Y: 4 9

are you sure you posted the right code ?

where's the rest of the traceback, btw ?

</F> 





From reply.in.the.newsgroup at my.address.is.invalid  Fri Feb 10 15:32:16 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Fri, 10 Feb 2006 21:32:16 +0100
Subject: installing python on a server?
References: <PB6Hf.1596$No6.37972@news.tufts.edu>
Message-ID: <hntpu1pmctfaa61ns32k539nisvvljd96n@4ax.com>

John Salerno:
>Can anyone tell me how complicated it might be to install Python on my 
>server so I can use it for web apps?

2 on a scale from 1 to 10.

>Is it a one-time process, or something to maintain?

Both :-)

I installed Python 2.2 - 2.4 from source on Linux with no problem
whatsoever. I now plan about 5 minutes installation time per new release,
that's 2 minutes to make coffee, 2 minutes to skim the release notes and
README and 1 minute to watch ./configure; make; make install do it's
magic.

There are some details to watch out for, such as having the required
libraries and include files around before installation, to enable specific
functionality (e.g. SSL support in socket). But that's no big deal.

-- 
Ren? Pijlman


From jgardner at jonathangardner.net  Thu Feb 16 02:37:31 2006
From: jgardner at jonathangardner.net (Jonathan Gardner)
Date: 15 Feb 2006 23:37:31 -0800
Subject: Databases and python
In-Reply-To: <pan.2006.02.14.08.06.18.754312@dcs.nac.uci.edu>
References: <pan.2006.02.14.08.06.18.754312@dcs.nac.uci.edu>
Message-ID: <1140075451.474898.106320@g43g2000cwa.googlegroups.com>

I'm no expert in BDBs, but I have spent a fair amount of time working
with PostgreSQL and Oracle. It sounds like you need to put some
optimization into your algorithm and data representation.

I would do pretty much like you are doing, except I would only have the
following relations:

- word to word ID
- filename to filename ID
- word ID to filename ID

You're going to want an index on pretty much every column in this
database. That's because you're going to lookup by any one of these
columns for the corresponding value.

I said I wasn't an expert in BDBs. But I do have some experience
building up large databases. In the first stage, you just accumulate
the data. Then you build the indexes only as you need them. Let's say
you are scanning your files. You won't need an index on the
filename-to-ID table. That's because you are just putting data in
there. The word-to-ID table needs an index on the word, but not ID
(you're not looking up by ID yet.) And the word ID-to-filename ID table
doesn't need any indexes yet either. So build up the data without the
indexes. Once your scan is complete, then build up the indexes you'll
need for regular operation. You can probably incrementally add data as
you go.

As far as filename ID and word IDs go, just use a counter to generate
the next number. If you use base255 as the number, you're really not
going to save much space.

And your idea of hundreds of thousands of tables? Very bad. Don't do
it.



From e2wugui at gmail.com  Tue Feb 14 05:24:39 2006
From: e2wugui at gmail.com (e2wugui at gmail.com)
Date: 14 Feb 2006 02:24:39 -0800
Subject: is socket thread safe?
Message-ID: <1139912679.559724.131020@f14g2000cwb.googlegroups.com>


thread1:
    while 1:
        buf = s.read()
        process(buf)

thread2:
    while 1:
        buf = getdata()
        s.write(buf)



From EP at zomething.com  Sat Feb 25 15:11:10 2006
From: EP at zomething.com (EP)
Date: Sat, 25 Feb 2006 12:11:10 -0800
Subject: remote module importing (urlimport)
In-Reply-To: <1140801580.835062.90370@u72g2000cwu.googlegroups.com>
References: <43FE4A94.8010709@codeshift.net>	<mailman.2383.1140740895.27775.python-list@python.org>
	<1140801580.835062.90370@u72g2000cwu.googlegroups.com>
Message-ID: <4400B9DE.4060903@zomething.com>

ajones wrote:

>What plans do you have for security in this? I would think that in
>order to trust this over the network you would at least need a
>certificate identifying the server as well as some method of verifying
>package contents.
>
>Either way, cool stuff.
>
>  
>
I think this is an interesting project.

What if every module could be registered (at Python.org, for example) 
with a unique URI, a hash digest, and optionally a list of one or more 
source code sources (URLs)?  Each module registered would have to have a 
unique name, but that is probably a good thing anyway.

Then before loading a module the urlimport code could query something like

    "http://Python.org/cheeseshop/moduleNS/%s" %moduleName

 From whence would be returned a short text file, something like:

    ThisModuleName
    HashNumber
    ["http://source1/ThisModuleName.txt", 
"http://source2/funnydirectory/structure/ThisModuleName.txt"...]

urlimport could then query the sources given, or any other known 
repositories, until it found a module of matching digest.


What if you needed to use a certain version of a module for 
compatibility?  Then would module names like "ThisModuleName_2.71" 
become necessary?

I wonder if the ripples of setting something like this up offend 
Pythonic thinking... and if the utility of having this sort of 
functionality would be worth risking some offense.

I guess this stuff has all been done before and Python has good reasons 
for not pursuing it, but I wonder what those reasons are.


/EP


From __peter__ at web.de  Tue Feb 14 03:25:38 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 14 Feb 2006 09:25:38 +0100
Subject: Splitting a string
References: <43F18BA1.8010304@gmail.com>
	<mailman.1885.1139904030.27775.python-list@python.org>
Message-ID: <dss42t$7av$02$1@news.t-online.com>

Fredrik Lundh wrote:

>>>> re.split("(?i)\s*(?:and not|and|or)\s*", s)
> ['Smith, R.', 'White', 'Blue, T.', 'Black', 'Red', 'Green']
 
This fails for people with nasty names:

>>> s = "James White or Andy Grove and Jack Orr and not James Grand"
>>> re.split("(?i)\s*(?:and not|and|or)\s*", s)
['James White', '', 'y Grove', 'Jack', 'r', 'James Gr', '']

Here is an alternative:

>>> [s.strip() for s in re.split(r"(?i)\b(?:and|or|not)\b", s) if s.strip()]
['James White', 'Andy Grove', 'Jack Orr', 'James Grand']

Peter


From lashkariNO at SPAMworldviz.com  Thu Feb  9 20:00:44 2006
From: lashkariNO at SPAMworldviz.com (Farshid Lashkari)
Date: Thu, 09 Feb 2006 17:00:44 -0800
Subject: python spawn new process, rout stdin/out
In-Reply-To: <1139523177.415107.291710@g47g2000cwa.googlegroups.com>
References: <1139523177.415107.291710@g47g2000cwa.googlegroups.com>
Message-ID: <BARGf.3747$MJ.3489@fed1read07>

Sounds like the popen2 module should suffice. Take a look at the 
documentation for the module here:

http://www.python.org/doc/lib/module-popen2.html

-Farshid


From steve at REMOVETHIScyber.com.au  Fri Feb  3 07:33:22 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 03 Feb 2006 23:33:22 +1100
Subject: OO conventions
References: <mailman.1334.1138833641.27775.python-list@python.org>
	<43E13F39.2070709@freenet.de>
	<1138928426.867847.66790@g44g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.03.12.33.22.478662@REMOVETHIScyber.com.au>

On Thu, 02 Feb 2006 17:00:26 -0800, Blair P. Houghton wrote:

> Image would be a superclass to JPGImage, BMPImage, PNGImage, etc...
> 
> But which to use could only be determined AFTER opening the file,
> because "file.jpg" doesn't have type JPG, it has type string and
> semantic value "maybe a jpeg file or maybe something misnamed as a jpeg
> file".

Absolutely.
 
> So Image.open(filename) seems right as a factory function that opens
> the file, figures out what it really is, constructs the appropriate
> subclass object (likely by passing a string to the constructor, e.g.,
> JPGImage(filename)), and returns the object via the superclass type.
> The caller can then either check a flag in the superclass to see what
> type the subclass is, or just assume it's the right type of image for
> the filename extension (or does Python have RTTI? I don't recall if
> I've seen it, yet...).

RTTI = Run Time Type Information, yes?

Objects in Python are strongly typed, if that's what you mean. So if each
image kind (jpeg, tiff, png, etc.) is a subclass, then you can easily use
introspection to find out which subclass it is.



> Though if the filename doesn't match the content, someone should raise
> an exception...

That depends on whether you believe DOS style filename extensions are
significant, or that they are a poor substitute for real metadata.

If you come from Windows land, you might thing the file extension is the
file type. If you come from Linux land, you might think that file
extensions are just a label stuck on the file name as a convenience for
the user. If you come from Macintosh land, especially pre-OS X, you
probably think that file extensions are at best a useful redundancy and at
worst an abomination.

>From a UI perspective, an application should never refuse to handle a file
because of a mismatch between the file type contents, the file type
metadata (if any), and the file extension, with one important proviso as
follows. In general, if your application handles (say) both JPEGs and
GIFs, and the user tries to open a JPEG named foo.gif, then the correct
action is to advise the user that the file is actually a JPEG, and
give them the opportunity to open the file anyway.

Whether that is best handed internally by making Image.read() raise an
exception or not is a question for the class designer.

The proviso is, if there are potential security implications of that
mismatch (e.g. an executable file masquerading as a .text file), and the
target audience is technically naive, then I believe it may be appropriate
for the application to refuse to handle the file. Don't let the user shoot
themselves in the foot if they aren't technically sophisticated enough to
realise they are shooting themselves in the foot.


-- 
Steven.



From gregpinero at gmail.com  Sun Feb  5 00:21:50 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Sun, 5 Feb 2006 00:21:50 -0500
Subject: Recursive function going infinite and I can't see why.
In-Reply-To: <pan.2006.02.04.11.23.00.710814@REMOVETHIScyber.com.au>
References: <mailman.1409.1139037509.27775.python-list@python.org>
	<pan.2006.02.04.11.23.00.710814@REMOVETHIScyber.com.au>
Message-ID: <312cfe2b0602042121o3385fd01jadc71abeacf839a3@mail.gmail.com>

Ok, I finally got it working!  See below

On 2/4/06, Steven D'Aprano <steve at removethiscyber.com.au> wrote:
> On Sat, 04 Feb 2006 02:18:27 -0500, Gregory Pi?ero wrote:
> > class Node:
> >     def __init__(self):
> >         self.arg0=0
> >         self.arg1=0
> >         self.arg2=0
> >         self.arg3=0
>
> You appear to be iterating over these attributes. Hint: as soon as you
> have more than two pieces of data with names like foo0, foo1, foo2...
> you probably want something like this:
>
>     def __init__(self):
>         self.trees = [0, 0, 0, 0]  # they aren't args, they are sub-trees
>
> You are iterating over everything in __dict__ which is probably not what
> you want. Your code has serious side-effects, because you are iterating
> over ALL instance attributes, even the ones which are not nodes.
>
> for varname,value in node.__dict__.items():
>     node.__dict__[varname] = value
>     # this touches all instance attributes
>
> This is safer:
>
> for index, value in enumerate(node.trees):
>     node.trees[index] = value
>     # this only touches what you want

Yep, this is what fixed it.  Thanks Steve.  I turns out that there is
a lot of other stuff in __dict__ that was messing me up and causing
the infinite recursion.

Terry was also kind of right in that I was never hitting my base case,
since I was getting stuck on a var in __dict__ and recursing forever
before I ever got to the base case.

-Greg


From larry.bates at websafe.com  Fri Feb  3 18:58:39 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Fri, 03 Feb 2006 17:58:39 -0600
Subject: Python on Windows
In-Reply-To: <mailman.1389.1138987315.27775.python-list@python.org>
References: <mailman.1389.1138987315.27775.python-list@python.org>
Message-ID: <43E3EE2F.9040508@websafe.com>

Simon Faulkner wrote:
> I've just written my first (simple) WxPython program - yaaaay!
> 
> What would folks suggest is the easiest way to package it to run on
> other windows PCs?
> 
> I would love a single .exe file that would run without ANY OTHER FILES
> even if it was 50 Mb!
> 
> TIA
> 
> 
> Simon

Use py2exe to create distribution and then use Inno Installer to
create a single setup.exe file that can easily be distributed.

-Larry Bates


From gregpinero at gmail.com  Fri Feb 17 17:13:58 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Fri, 17 Feb 2006 17:13:58 -0500
Subject: Add a month
In-Reply-To: <312cfe2b0602171310t59e5dc04ucfae760822e329d7@mail.gmail.com>
References: <1140173540.686250.205760@g44g2000cwa.googlegroups.com>
	<mailman.2046.1140175284.27775.python-list@python.org>
	<1140178539.803209.84960@g47g2000cwa.googlegroups.com>
	<312cfe2b0602171308j2e6ed284t2c5dd2c130166db1@mail.gmail.com>
	<312cfe2b0602171310t59e5dc04ucfae760822e329d7@mail.gmail.com>
Message-ID: <312cfe2b0602171413u8010488od36eb3dbc83a2c9b@mail.gmail.com>

Ok, 30 minutes later, here's my best solution.

http://www.answermysearches.com/index.php/how-to-add-months-to-a-date-in-python/53/

(Posted on my website to make sure tabs are kept.)

Would someone mind double-checking my logic before I put this into
production next Tuesday?

-Greg


On 2/17/06, Gregory Pi?ero <gregpinero at gmail.com> wrote:
> Actually, no wait, that's bad.  It doesn't increment the year.
>
> Does anyone have a simple way to code this?
>
> -Greg
>
>
> On 2/17/06, Gregory Pi?ero <gregpinero at gmail.com> wrote:
> > Here's how I do it:
> >
> > def monthify(anint):
> >     if anint%12==0:return 12
> >     else:return anint%12
> >
> > import datetime
> > d=datetime.datetime.today()
> > dplus1month=datetime.datetime(d.year,monthify(d.month+1),d.day)
> >
> > We need monthify because adding 1 to 12 is bad otherwise!
> >
> > -Greg
> >
> > On 17 Feb 2006 04:15:39 -0800, Paul Boddie <paul at boddie.org.uk> wrote:
> > > Fredrik Lundh wrote:
> > > >
> > > > what do you expect d_new to be after the operation ?  if the answer
> > > > is date(2006,3,17), what's date(2006,1,31) plus one month?
> > >
> > > February 31st, of course:
> > >
> > > http://sql-info.de/mysql/gotchas.html#1_14
> > >
> > > ;-)
> > >
> > > Paul
> > >
> > > --
> > > http://mail.python.org/mailman/listinfo/python-list
> > >
> >
> >
> > --
> > Gregory Pi?ero
> > Chief Innovation Officer
> > Blended Technologies
> > (www.blendedtechnologies.com)
> >
>
>
> --
> Gregory Pi?ero
> Chief Innovation Officer
> Blended Technologies
> (www.blendedtechnologies.com)
>


--
Gregory Pi?ero
Chief Innovation Officer
Blended Technologies
(www.blendedtechnologies.com)


From mensanator at aol.com  Thu Feb  9 18:25:18 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 9 Feb 2006 15:25:18 -0800
Subject: Pulling all n-sized combinations from a list
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>
	<mailman.1668.1139501162.27775.python-list@python.org>
	<1139509392.890581.94470@g43g2000cwa.googlegroups.com>
	<mailman.1676.1139512284.27775.python-list@python.org>
Message-ID: <1139527518.210792.3420@g14g2000cwa.googlegroups.com>


Jack Diederich wrote:
> On Thu, Feb 09, 2006 at 10:23:12AM -0800, mensanator at aol.com wrote:
> > Jack Diederich wrote:
> > > On Wed, Feb 08, 2006 at 12:50:19PM -0800, Swroteb wrote:
> > > > Hi there,
> > > >
> > > > I've got a reasonably sized list of objects that I'd like to pull out
> > > > all combinations of five elements from.  Right now I have a way to do
> > > > this that's quite slow, but manageable.  I know there must be a better
> > > > way to do this, but I'm not sure what it is.  Here's what I've got so
> > > > far:
> > > >
> > >
> > > import probstat # http://probstat.sourceforge.net
> > > for (a, b, c) in probstat.Combination(range(9), 3): # 0..9, pick 3
> > >   print a, b, c
> > >
> > > It is a C extension that does permutations & combinations and is
> > > about 10x faster than doing it in pure python [I'm the author].
> > > It is also the 3rd result for "python combination" and 5th for
> > > "python permutaiton" but every month someone posts to c.l.py asking
> > > for something similar.  Go figure.
> >
> > Did you ever figure that some people use Windows?
>
> I don't have a windows dev box so I can't vouch for this binary but
> a user sent me a windows .pyd yesterday.
>
> http://jackdied.com/static/probstat.pyd
>
> -jackdied


Hey, thanks!

I have a pure Python permutation generator that generates
a Cartesian product of a string with itself with filters
to emulate

permutation w/  replacemment
combination w/  replacemment
permutation w/o replacemment
combination w/o replacemment

so I put together a little test program to see how probstat
compares. Correspondence to my emulations is (as far as I can tell)

permutation w/  replacemment: equivalent to probstat.Cartesian
combination w/  replacemment: no equivalent
permutation w/o replacemment: equivalent to probstat.Permutation
combination w/o replacemment: equivalent to probstat.Combination

Here's the test program:

-----------------------------------------------------

import probstat
import time

def cxxx(m):
    return '(' + ' and '.join(['(i%s!=i%s)' % (m,i) for i in range(m)])
+ ')'

def ooloop5(a, n, perm=True, repl=True):
        if (not repl) and (n>len(a)): return
        p = []
	loop = '\n'.join([(' ' * i) + 'for i%s in a:' % i for i in range(n)])
+ '\n'
	indt = ' ' * n
	sub1 = indt + 'if perm and repl:\n'
	sub2 = indt + 'if (not perm) and repl:\n'
	ccc2 = ' and '.join(['(i%s>=i%s)' % (i,i-1) for i in range(1,n)])
	con2 = indt + ' if ' + ccc2 + ':\n'
	sub3 = indt + 'if perm and (not repl):\n'
	cccx = ' and '.join([cxxx(m) for m in range(1,n)])
	con3 = indt + ' if ' + cccx + ':\n'
	sub4 = indt + 'if (not perm) and (not repl):\n'
	ccc4 = ' and '.join(['(i%s>i%s)' % (i,i-1) for i in range(1,n)])
	con4 = indt + ' if ' + ccc4 + ':\n'
	bod1 = indt + ' s = ' + '+'.join(['i%s' % i for i in range(n)]) + '\n'
	bod2 = indt + ' p.append(s)\n'
	bod3 = indt + '  s = ' + '+'.join(['i%s' % i for i in range(n)]) +
'\n'
	bod4 = indt + '  p.append(s)\n'
	e = loop + sub1 + bod1 + bod2 + sub2 + con2 + bod3 + bod4 + sub3 +
con3 + bod3 + bod4 + sub4 + con4 + bod3 + bod4
	exec e
	return p

def p_cart(a,n):
        A = list(a)
        c = probstat.Cartesian([A for i in range(n)])
        p = []
        for i in c:
            p.append(''.join(i))
        return p

def p_perm(a,n):
        A = list(a)
        t0 = time.time()
        if len(A)<n:
            c = probstat.Permutation(A,n)
        else:
            c = probstat.Permutation(A)
        print time.time()-t0
        p = []
        for i in c:
            p.append(''.join(i))
        return p

def p_comb(a,n):
        A = list(a)
        c = probstat.Combination(A,n)
        p = []
        for i in c:
            p.append(''.join(i))
        return p

print 'permutation w/  replacemment'
p = ooloop5("abc", 3, True, True)
print p
print

print 'combination w/  replacemment'
p = ooloop5("abc", 3, False, True)
print p
print

print 'permutation w/o replacemment'
p = ooloop5("abc", 3, True, False)
print p
print

print 'combination w/o replacemment'
p = ooloop5("abc", 3, False, False)
print p
print


print 'probstat.Cartesian'
p = p_cart('abc',3)
print p
print

print 'probstat.Permutation'
p = p_perm('abc',3)
print p
print

print 'probstat.Combination'
p = p_comb('abc',3)
print p
print

print 'permutation w/  replacemment "abcdefghijklmnopqrstuvwxyz":4'
t0 = time.time()
p = ooloop5("abcdefghijklmnopqrstuvwxyz", 4, True, True)
t1 = time.time()
print len(p),'4-letter words',t1-t0,'seconds'

print 'combination w/  replacemment "abcdefghijklmnopqrstuvwxyz":4'
t0 = time.time()
p = ooloop5("abcdefghijklmnopqrstuvwxyz", 4, False, True)
t1 = time.time()
print len(p),'4-letter words',t1-t0,'seconds'

print 'permutation w/o replacemment "abcdefghijklmnopqrstuvwxyz":4'
t0 = time.time()
p = ooloop5("abcdefghijklmnopqrstuvwxyz", 4, True, False)
t1 = time.time()
print len(p),'4-letter words',t1-t0,'seconds'

print 'combination w/o replacemment "abcdefghijklmnopqrstuvwxyz":4'
t0 = time.time()
p = ooloop5("abcdefghijklmnopqrstuvwxyz", 4, False, False)
t1 = time.time()
print len(p),'4-letter words',t1-t0,'seconds'

print

print 'probstat.Cartesian "abcdefghijklmnopqrstuvwxyz":4'
t0 = time.time()
p = p_cart('abcdefghijklmnopqrstuvwxyz',4)
t1 = time.time()
print len(p),'4-letter words',t1-t0,'seconds'

print 'probstat.Permutation "abcdefghijklmnopqrstuvwxyz":4'
t0 = time.time()
p = p_perm('abcdefghijklmnopqrstuvwxyz',4)
t1 = time.time()
print len(p),'4-letter words',t1-t0,'seconds'

print 'probstat.Combination "abcdefghijklmnopqrstuvwxyz":4'
t0 = time.time()
p = p_comb('abcdefghijklmnopqrstuvwxyz',4)
t1 = time.time()
print len(p),'4-letter words',t1-t0,'seconds'

-----------------------------------------------------

The short tests worked out fine

permutation w/  replacemment
['aaa', 'aab', 'aac', 'aba', 'abb', 'abc', 'aca', 'acb', 'acc', 'baa',
'bab', 'bac', 'bba', 'bbb', 'bbc', 'bca', 'bcb', 'bcc', 'caa', 'cab',
'cac', 'cba', 'cbb', 'cbc', 'cca', 'ccb', 'ccc']

combination w/  replacemment
['aaa', 'aab', 'aac', 'abb', 'abc', 'acc', 'bbb', 'bbc', 'bcc', 'ccc']

permutation w/o replacemment
['abc', 'acb', 'bac', 'bca', 'cab', 'cba']

combination w/o replacemment
['abc']

probstat.Cartesian
['aaa', 'baa', 'caa', 'aba', 'bba', 'cba', 'aca', 'bca', 'cca', 'aab',
'bab', 'cab', 'abb', 'bbb', 'cbb', 'acb', 'bcb', 'ccb', 'aac', 'bac',
'cac', 'abc', 'bbc', 'cbc', 'acc', 'bcc', 'ccc']

probstat.Permutation
['abc', 'acb', 'bac', 'bca', 'cab', 'cba']

probstat.Combination
['abc']

-----------------------------------------------------

Unfortunately, the long test died (out of virtual memory) executing
the probstat.Permution test.

But here's the strange thing. When executed from the Idle prompt,
it works fine.

>>> import probstat
>>> A = list('abcdefghijklmnopqrstuvwxyz')
>>> c = probstat.Permutation(A,4)
>>> print len(c)
358800
>>> for i in c[:10]:print i

['a', 'b', 'c', 'd']
['a', 'b', 'd', 'c']
['a', 'c', 'b', 'd']
['a', 'c', 'd', 'b']
['a', 'd', 'b', 'c']
['a', 'd', 'c', 'b']
['b', 'a', 'c', 'd']
['b', 'a', 'd', 'c']
['b', 'c', 'a', 'd']
['b', 'c', 'd', 'a']
>>> p = []
>>> for i in c: p.append(''.join(i))
>>>
>>> for i in p[:10]:print i

abcd
abdc
acbd
acdb
adbc
adcb
bacd
badc
bcad
bcda

-----------------------------------------------------
And if I comment out the Permutation test, everything else
works ok.

permutation w/  replacemment "abcdefghijklmnopqrstuvwxyz":4
456976 4-letter words 1.23500013351 seconds
combination w/  replacemment "abcdefghijklmnopqrstuvwxyz":4
23751 4-letter words 0.68799996376 seconds
permutation w/o replacemment "abcdefghijklmnopqrstuvwxyz":4
358800 4-letter words 1.67199993134 seconds
combination w/o replacemment "abcdefghijklmnopqrstuvwxyz":4
14950 4-letter words 0.59299993515 seconds

probstat.Cartesian "abcdefghijklmnopqrstuvwxyz":4
456976 4-letter words 1.42200016975 seconds
probstat.Combination "abcdefghijklmnopqrstuvwxyz":4
14950 4-letter words 0.0780000686646 seconds

-----------------------------------------------------

But it fails if I call it from inside a function.

>>> import probstat
>>> import time
>>> def p_perm(a,n):
        A = list(a)
        if len(A)<n:
            c = probstat.Permutation(A,n)
        else:
            c = probstat.Permutation(A)
        p = []
        for i in c:
            p.append(''.join(i))
        return p

>>> p = p_perm('abcdefghijklmnopqrstuvwxyz',4)

Crash! Out of virtual memory.

-----------------------------------------------------

I noticed that the probstat call takes virtually no time, most of it
taken by the p.append loop.

>>> def p_perm(a,n):
        A = list(a)
        if len(A)<n:
            c = probstat.Permutation(A,n)
        else:
            c = probstat.Permutation(A)
        print 'probstat finished'
        p = []
        for i in c:
            p.append(''.join(i))
        return p

>>> p = p_perm('abcdefghijklmnopqrstuvwxyz',4)
probstat finished

Aha! Must be dying during the p.append loop.

-----------------------------------------------------

So we'll skip the append for now.

def p_perm(a,n):
        A = list(a)
        t0 = time.time()
        if len(A)<n:
            q = probstat.Permutation(A,n)
        else:
            q = probstat.Permutation(A)
        print time.time()-t0
        #p = []
        #for i in c:
        #    p.append(''.join(i))
        #return p
        print len(q)
        for i in q[:10]: print i
        return q



probstat.Permutation "abcdefghijklmnopqrstuvwxyz":4
0.0
-1853882368
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z']
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'z', 'y']
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'y', 'x', 'z']
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'y', 'z', 'x']
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'z', 'x', 'y']
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'z', 'y', 'x']
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'x', 'w', 'y', 'z']
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'x', 'w', 'z', 'y']
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'x', 'y', 'w', 'z']
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'x', 'y', 'z', 'w']
-1853882368 4-letter words 0.25 seconds

HUH??? No wonder the append loop has convulsions!

and why are the lists length 26? s/b len 4.


And yet...

>>> q = probstat.Permutation(list('abcdefghijklmnopqrstuvwxyz'),4)
>>> print len(q)
358800
>>> for i in q[:10]:print i

['a', 'b', 'c', 'd']
['a', 'b', 'd', 'c']
['a', 'c', 'b', 'd']
['a', 'c', 'd', 'b']
['a', 'd', 'b', 'c']
['a', 'd', 'c', 'b']
['b', 'a', 'c', 'd']
['b', 'a', 'd', 'c']
['b', 'c', 'a', 'd']
['b', 'c', 'd', 'a']

-----------------------------------------------------

That's one of the strangest problems I've ever seen.

I don't know if this has anything to do with the pyd file,
but I figured you would like to know.



From stijndesaeger at gmail.com  Wed Feb  8 02:01:58 2006
From: stijndesaeger at gmail.com (vdrab)
Date: 7 Feb 2006 23:01:58 -0800
Subject: Uses of The 4th Dimension (New Discovery by The Human Race!)
In-Reply-To: <3jcGf.79$KY2.42@fe04.lga>
References: <1139317832.965864.129160@g43g2000cwa.googlegroups.com>
	<3jcGf.79$KY2.42@fe04.lga>
Message-ID: <1139381999.305869.69830@f14g2000cwb.googlegroups.com>

I WISH TO KNOW THE TRUTH:
WHEN WILL WE HAVE PYPY?



From brianhray at gmail.com  Fri Feb  3 21:04:13 2006
From: brianhray at gmail.com (brianhray at gmail.com)
Date: 3 Feb 2006 18:04:13 -0800
Subject: fairly large webapp: from Java to Python. experiences?
In-Reply-To: <1139005746.363918.267370@g47g2000cwa.googlegroups.com>
References: <1139005746.363918.267370@g47g2000cwa.googlegroups.com>
Message-ID: <1139018653.508049.182020@g43g2000cwa.googlegroups.com>

To replace a large framework you will probably need a framework. Take a
look at http://www.djangoproject.com or http://www.turbogears.org. They
both use some of the tools you mention but operate on a higher level.

I find Python fairly easy to maintain. Unfortunatly, I do not find it
easy to take a bunch of Java code and move it to Python. But once it is
there, Python is a good choice for web apps. Java is slow and has a big
footprint. Python is reasonably nimble and good design choices pay off.
Plus, you must write many more lines of Java to do what you can in
Python. I do not know the code you are not working with, but a lot of
large Java apps can be poorly written.

I guess you could also look at http://www.jython.org/ and see if you
can somehow make the transition but not all at once.

Good luck,
<http://brianray.chipy.org>



From aleaxit at yahoo.com  Wed Feb  1 21:50:00 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Wed, 1 Feb 2006 18:50:00 -0800
Subject: How do I dynamically create functions without lambda?
References: <1138389517.896043.7450@g47g2000cwa.googlegroups.com>
	<pan.2006.01.28.00.35.06.174939@REMOVETHIScyber.com.au>
	<1138436008.628882.126510@g44g2000cwa.googlegroups.com>
	<pan.2006.01.28.12.02.34.293286@REMOVETHIScyber.com.au>
	<drr978$oat$1@xenon.Stanford.EDU>
Message-ID: <1ha3g79.1gcm6x1yziggyN%aleaxit@yahoo.com>

Alan Morgan <amorgan at xenon.Stanford.EDU> wrote:
   ...
> Excessive cleverness can lead to unmaintainable code.  So can excessive
> stupidity.

+1 QOTW.

> Since there are a lot more stupid people than clever people out there I
> think the more likely scenario is having to maintain unmaintainable code
> written by a complete idiot whose programming knowledge comes solely from
> books whose titles end with "In 7 Days".

Disagree -- far more people THINK they're clever, than really ARE
clever.  According to a recent article in the Financial Times, over 40%
of a typical financial firm's employees firmly believe they are among
the 5% best employees of the firm -- and the situation, believe me, is
no different in programming.


Alex


From joel.hedlund at gmail.com  Wed Feb 15 09:24:11 2006
From: joel.hedlund at gmail.com (Joel Hedlund)
Date: Wed, 15 Feb 2006 15:24:11 +0100
Subject: Best way of finding terminal width/height?
In-Reply-To: <11umnq61kf9m5f3@corp.supernews.com>
References: <96nFf.43896$d5.199922@newsb.telia.net>
	<11uc3dohfitotc5@corp.supernews.com>
	<jysFf.155352$dP1.513537@newsc.telia.net>
	<11udc0r2bq11042@corp.supernews.com> <43E719EE.3040401@gmail.com>
	<11ueq4nhn91qm91@corp.supernews.com> <43E8659D.6010101@gmail.com>
	<11uhcjj2p10mm0d@corp.supernews.com> <43E8D4DD.7040904@gmail.com>
	<11uhodjciifej02@corp.supernews.com>
	<dscfcv$t5i$1@news.lysator.liu.se>
	<11uk67a4ao5efe6@corp.supernews.com>
	<dset15$hfq$1@news.lysator.liu.se>
	<11umnq61kf9m5f3@corp.supernews.com>
Message-ID: <dsvd93$8g2$1@news.lysator.liu.se>

> Sure.  I was going to do that yesterday, but I realized that I
> didn't know how/where to do it.  I assume there's a link
> somewhere at www.python.org, but I haven't had a chance to look
> yet.

It's already reported to the bug tracker:

http://www.python.org/sf/210599

Apparently, this has been around since 1.5.2. It's in fact also in the feature request PEP right now: 

http://www.python.org/peps/pep-0042.html

and it's listed as a "Big" project under the "Standard library" heading. I assume we're going to have to live with this for a while yet...

Take care everyone!
/Joel


From ram0812 at hotmail.com  Tue Feb  7 11:08:42 2006
From: ram0812 at hotmail.com (Raja Raman Sundararajan)
Date: 7 Feb 2006 08:08:42 -0800
Subject: Regular Expression Syntax Help
In-Reply-To: <1139326434.597342.290090@z14g2000cwz.googlegroups.com>
References: <1139324925.233027.26430@o13g2000cwo.googlegroups.com>
	<1139326434.597342.290090@z14g2000cwz.googlegroups.com>
Message-ID: <1139328522.895835.137090@g47g2000cwa.googlegroups.com>

try this. maybe this is what you want?

reg = re.compile('Name:.*\\n', re.IGNORECASE)



From deets at nospam.web.de  Sun Feb  5 09:36:49 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 05 Feb 2006 15:36:49 +0100
Subject: NumPy error
References: <KLnFf.3$ug1.0@fe04.lga>
Message-ID: <44mgs1F2to82U1@uni-berlin.de>

jason wrote:

> Hello:
> 
> I am using the following versions of Python and packages on Windows XP
> (SP2):
> 
> Python 2.4.2
> NumPy  0.9.4.win32-py2.4
> SciPy 0.4.4 for Python 2.4 and Pentium 4/SSE2

I fell for that yesterday. Cost me two hours. You have to install NumPy
0.9.2. Make sure you cleaned up the site-packages, and if you build stuff
yourself, a clean rebuild is necessary.

Regards,

Diez


From chrism at plope.com  Wed Feb  8 12:36:33 2006
From: chrism at plope.com (Chris McDonough)
Date: Wed, 08 Feb 2006 12:36:33 -0500
Subject: breadth first search
In-Reply-To: <dsd950$62f$02$1@news.t-online.com>
References: <43ea2271$1@127.0.0.1> <43EA2474.7010109@plope.com>
	<dsd950$62f$02$1@news.t-online.com>
Message-ID: <K_pGf.280$6G.172@dukeread03>

Peter Otten wrote:
> Chris McDonough wrote:
> 
>>> Can Python
>>> create list dynamically, I want to implement a program which will read
>>> data from a file and store each line into a list, is this possible?
>> L = []
>> [L.append(line) for line in (open('filename.txt')]
> 
> Why would you create two lists, one filled only with None entries just to
> throw it away immediately? Don't use list comprehensions just because you
> can. 

Yes, of course.  Thank you.  I didn't mean to offend your sensibilities. 
I'm not retarded *every* day, just today. ;-)

- C


From epost2 at gmail.com  Thu Feb  2 17:01:31 2006
From: epost2 at gmail.com (epost2 at gmail.com)
Date: 2 Feb 2006 14:01:31 -0800
Subject: Windows - create text file - (newb)
References: <1138916451.293717.283320@g44g2000cwa.googlegroups.com>
Message-ID: <1138917691.431422.277080@g14g2000cwa.googlegroups.com>

Yes. You could do:

Python 2.4.2 (#2, Sep 30 2005, 21:19:01)
[GCC 4.0.2 20050808 (prerelease) (Ubuntu 4.0.1-4ubuntu8)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> fileobj=open('~\myfile.txt','w')
>>> fileobj.write("test")
>>> fileobj.close()

On Windows, for the path to your file, you could write
r'C:\myfile.txt' (if C:\ is a place you can write to.)

also, see the output from

>>> help("open")



From steve at holdenweb.com  Thu Feb  9 07:29:13 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 09 Feb 2006 07:29:13 -0500
Subject: Curios issues with Editors
In-Reply-To: <1139487823.219867.71790@z14g2000cwz.googlegroups.com>
References: <1139487823.219867.71790@z14g2000cwz.googlegroups.com>
Message-ID: <dsfcip$d90$2@sea.gmane.org>

rodmc wrote:
> I recently wrote a program in IDLE and it runs perfectly. However when
> the same application is executed within SPE I receive errors  saying
> that certain socket items are not callable, in particular AF_INET.
> 
> I am new to Python, is there a reason why somethings will run in IDLE
> and not SPE?
> 
> I could post the source code but it is changing quite a bit, so this is
> more of a general question than one about a specific bug or issue.
> 
I think you are fooling yourself about this error.

  >>> import socket
  >>> type(socket.AF_INET)
<type 'int'>
  >>>

You would appear to have some code that reads something like

     socket.AF_INET( ... )

which is clearly wrong, since AF_INET is an integer intended to indicate 
the address family required at the creation of a socket.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From hancock at anansispaceworks.com  Sat Feb 11 02:47:51 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Sat, 11 Feb 2006 01:47:51 -0600
Subject: Legality of using Fonts
In-Reply-To: <1139591308.864757.154740@g44g2000cwa.googlegroups.com>
References: <1139591308.864757.154740@g44g2000cwa.googlegroups.com>
Message-ID: <20060211014751.304dac6f@samwise.anansi>

On 10 Feb 2006 09:08:28 -0800
"Kamilche" <klachemin at comcast.net> wrote:
> Let's say I own a font, and use it in a paint program to
> 'draw some text' on a picture that I slap up on the
> Internet. Everything's probably fine, right? But what if I
> draw some text on a bitmap on the hard drive, add drop
> shadows and decorations, and use it to 'blit' text in a
> game? The answer is less obvious to me then.

In fact, the answer depends on what country you are in.

In the United States, the actual visual images of the
characters in a font are not copyrightable material. You can
do anything you like with them.

TrueType, however, adds an extra wrinkle, because a TT font
is actually a *program* to create those images.  However,
you can escape this entirely if the only thing you use is
the *rendering* of the characters.  You could, for example,
create an entire *bitmap* font at a given font size, by
cutting and pasting output from a TT font.

Using the *name* of the font may be a bit stickier, because
it may well be trademarked (i.e. if you generated your
bitmap font from the FooBar(TM) TTF, you may not be able to
call your font FooBar, though you may get away with calling
it TooBar, or some such thing.  Certain fonts that have wide
use in the free-software community, such as the "Lucida"
series have had this problem.

So far, this is all good news for you.  But in fact, fonts
can be copyrightable under the laws of some nations, so you
could get into a sticky area just because of that.

I think that even in that case, though, you'd be okay with
just about any font you have a legal right to use.

So, I personally consider that reason enough to prefer free
fonts, and there are quite a few of them available. Many of
them are quite nice.  Unfortunately, of course, there is
*not* as much selection as would be nice, and it would be a
great thing if more free-licensed typography was available.
But it is, of course, hard and exacting work that not many
people know how to do well.

Finding truly free-licensed fonts can be a bit difficult
because there are so-many "sort of" free fonts that it
clutters the field.  Several good fonts are included in the
Debian Linux distribution, though, and of course, they had
to get debian-legal's stamp of approval to get there, so
they are indeed free.  Otherwise, you have to look harder,
and read carefully.

Cheers,
Terry

 -- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From fakeaddress at nowhere.org  Fri Feb 17 06:18:02 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Fri, 17 Feb 2006 11:18:02 GMT
Subject: Databases and python
In-Reply-To: <pan.2006.02.17.03.17.08.569209@dcs.nac.uci.edu>
References: <pan.2006.02.14.08.06.18.754312@dcs.nac.uci.edu>
	<Yl%If.13638$2O6.13570@newssvr12.news.prodigy.com>
	<pan.2006.02.17.03.17.08.569209@dcs.nac.uci.edu>
Message-ID: <KhiJf.48767$dW3.25929@newssvr21.news.prodigy.com>

Dan Stromberg wrote:
>  Bryan Olson wrote:
[...]
>> Well, you could use simple files instead of fancy database tables.
> 
> That's an interesting thought.  Perhaps especially if australopithecine
> were saved in a filename like:
> 
> ~/indices/au/st/ra/lo/pi/th/ec/in/e 

Right, though the better filesystems can efficiently support large
numbers of files per directory.

>>Below is a demo of an alternate technique that uses bsddb B-Trees,
>>and puts both the word and the file-id in the key. I don't know
>>how efficient it is for real data, but at least the time won't grow
>>as Theta(n**2).
> 
> 
> Perhaps I'm missing something, but is it not roughly O(1) for
> individual insertions, but O(n*m) (n == number of files, m == number of
> words) for lookups?

Insertion into a B-Tree with n elements is Theta(lg(n)). Finding the
files associated with a word, call the number of them 'k', should
be Theta(lg(n) + k). That assumes words and files are roughly
constant size.


-- 
--Bryan


From dickey at saltmine.radix.net  Wed Feb  8 18:44:50 2006
From: dickey at saltmine.radix.net (Thomas Dickey)
Date: Wed, 08 Feb 2006 23:44:50 -0000
Subject: Problem with curses and UTF-8
References: <mailman.1566.1139345769.27775.python-list@python.org>
	<43E9234B.6030108@v.loewis.de> <11ujl0hof3fql62@corp.supernews.com>
	<mailman.1617.1139425534.27775.python-list@python.org>
	<mailman.1627.1139434044.27775.python-list@python.org>
Message-ID: <11ul0jikd52lma2@corp.supernews.com>

"Martin v. L?wis" <martin at v.loewis.de> wrote:
>> I'll test it if someone would dumb down "link with ncursesw instead of
>> ncurses" a little for me.
>> 
>> I tried:
>> ./configure --with-libs="ncursesw5"
>> 
>> and it failed saying:
>> checking size of wchar_t... configure: error: cannot compute sizeof
>> (wchar_t), 77

> If that was Python's configure: don't do that. Instead, hack setup.py

yes - python's configure script needs a lot of work
(alternatively, it is not the sort of script I would write).

> to make it change the compiler/linker settings, or even edit the
> compiler/linker line manually at first.

that works

-- 
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net


From peter at engcorp.com  Sat Feb 18 09:55:21 2006
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 18 Feb 2006 09:55:21 -0500
Subject: GDI in python>?
In-Reply-To: <1140242543.204760.174390@g44g2000cwa.googlegroups.com>
References: <1140242543.204760.174390@g44g2000cwa.googlegroups.com>
Message-ID: <dt7cgs$nog$1@sea.gmane.org>

al pacino wrote:
> is it possible to address the  'screen pixels' using python , like
> analogous to older dos( functions that graphics.h provides') or win api
> calls for gdi.
> 
> what i want is to display clusters (in differetn colours) on screen
> using python.

Almost any (or just "any") GUI toolkit can do that.  Check out wxPython, 
Tkinter, PyQT, Pygame, etc.

For example, in the wxPython demo (two easy downloads to install and run 
on a Windows box), the Miscellaneous->DrawXXXList demo page shows how to 
draw sets of points, lines, rectangles, etc, directly to the display via 
a DeviceContext object.

-Peter



From jasondrew72 at gmail.com  Thu Feb 23 14:55:01 2006
From: jasondrew72 at gmail.com (Jason Drew)
Date: 23 Feb 2006 11:55:01 -0800
Subject: How to move optparse from main to function?
In-Reply-To: <1140721179.096585.202560@g14g2000cwa.googlegroups.com>
References: <1140721179.096585.202560@g14g2000cwa.googlegroups.com>
Message-ID: <1140724501.360284.227790@i39g2000cwa.googlegroups.com>

As pointed out, the module documentation is helpful.

For your 'test' option, I don't think 'action="count"' is the best
action. 'Test' is basically an on/off option, so why count it? I would
use:

parser.add_option("-t", "--test", action="store_true",
dest="optparse_test", default=False, help="testing optparse")

Then your code can use
if options.optparse_test == True: ...
or briefer:
if options.optparse_test: ...


As for putting the optparse code into a function, I sometimes use:

def parserSetup():
    """Return a configured option parser for this program."""
    parser = OptionParser()
    parser.add_option( ... your option stuff ... )
    parser.add_option( ... )
    return parser

if __name__=="__main__":
    parser = parserSetup()
    (options, args) = parser.parse_args()
    # Then in your case:
    if options.optparse_test: ...



From phleum_nospam at chello.se  Sat Feb 18 10:02:46 2006
From: phleum_nospam at chello.se (Carl Johan Rehn)
Date: Sat, 18 Feb 2006 16:02:46 +0100
Subject: Difference between CPython, Python for .NET and IronPython?
Message-ID: <pGGJf.5441$zc1.999@amstwist00>

What is the difference between CPython, Python for .NET, and IronPython?

For example, if I'm running IronPython, can I access modules such as Numeric
and numarray?
 
As I understand it, interoperability with C# and .NET works in both
directions with IronPython, but CPython modules cannot be imported, or? 

With Python for .NET I can import the .NET Framework and continue using
CPython modules, or?

What is the roadmap for IronPython, will it be possible to import CPython
modules in the near future?

One last question, is IronPython cross-platform. That is, can I use
IronPython with Mono?

Carl


From tjreedy at udel.edu  Tue Feb 28 14:26:49 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 28 Feb 2006 14:26:49 -0500
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local><1141109451.570616.86140@p10g2000cwp.googlegroups.com>
	<440415A1.7070503@ofai.at>
Message-ID: <du285o$ub1$1@sea.gmane.org>


"Stefan Rank" <stefan.rank at ofai.at> wrote in message 
news:440415A1.7070503 at ofai.at...
> recent examples from this list:
>
> 2006-01-03: http://www.nabble.com/Re%3A-Regex-anomaly-p2179421.html
> 2006-02-20:
> http://www.nabble.com/Re%3A-Regular-expression-gone-mad-p3029028.html

If the re flags were implemented as instances of object instead of int,
then misuse of them as int args would be excepted.  I don't know if such a 
change would otherwise cause a problem.

I wonder whether a subclass of object (EnumSet?) that allowed for 
initialization with a better string representation and that disabled order 
comparisons would fill the bill for unordered enum.

As Steven Bethard also noted, there seem to be a need for two Enum 
subclasses:
EnumSet and EnumSeq.

Terry Jan Reedy





From mark at mark-fink.de  Sun Feb  5 08:29:35 2006
From: mark at mark-fink.de (Mark Fink)
Date: 5 Feb 2006 05:29:35 -0800
Subject: rexec in jython??
References: <1139138133.072742.282710@z14g2000cwz.googlegroups.com>
	<1139140115.016898.72360@z14g2000cwz.googlegroups.com>
	<1139142998.236991.130470@g47g2000cwa.googlegroups.com>
	<44mb0pF2rqu1U1@uni-berlin.de>
Message-ID: <1139146174.981081.108700@o13g2000cwo.googlegroups.com>

This is the original code section of the library including the
comments:
class AutoAdapter(TypeAdapter):
    """
    This adapter returns a type based on the format of the table cell
    contents, following python's rules for literals (plus a few
others).
    We could fall back on this when we don't know what type is
expected.
    I am lazy and so use rexec to do the work.

    #Note: The RExec class can prevent code from performing unsafe
    #operations like reading or writing disk files, or using TCP/IP
    #sockets. However, it does not protect against code using
    #extremely large amounts of memory or processor time.
    """
    r_eval = RExec().r_eval
    def parse(self,s):
        if s.strip().lower() == 'true':
            return 1
        elif s.strip().lower() == 'false':
            return 0
        else:
            try:
                return self.r_eval(s)
            except SystemExit:
                return None
            except:
                return s

I completely removed the import of rexec and replaced "return
self.r_eval(s)" with "return self.eval(s)"



From claird at lairds.us  Thu Feb  9 17:08:02 2006
From: claird at lairds.us (Cameron Laird)
Date: Thu, 09 Feb 2006 22:08:02 GMT
Subject: Hi reliability files, writing,reading,maintaining
References: <fhGGf.274074$vl2.129103@fe2.news.blueyonder.co.uk>
	<43eb4480$0$11064$e4fe514c@news.xs4all.nl>
Message-ID: <ktpsb3-avr.ln1@lairds.us>

In article <43eb4480$0$11064$e4fe514c at news.xs4all.nl>,
Martin P. Hellwig <mhellwig at xs4all.nl> wrote:
>John Pote wrote:
><cut>
>> So my request:
>> 1. Are there any python modules 'out there' that might help in securely
>> writing such files.
>> 2. Can anyone suggest a book or two on this kind of file management. (These
>> kind of problems must have been solved in the financial world many times).
>> 
><cut>
>I can't answer your specific questions but I got the feeling that you're 
>  barking at the wrong tree ;-)
>
>You don't want to solve this in you application, file management is what 
>the OS and hardware is about. "Military" grade solutions are often 
>(depending on their criticalness) double or triple hot spares in the 
>same room which can be seen as a "unit" and these units are duplicated 
>on remote locations (at least 25km of each other) syncing their data 
>with standard tools like rsync.
>
>If you don't have military budget, I would suggest to do it a little 
>less expensive, like having a couple of Solaris machines (three or four 
>will do it) in the same room, using a part of their diskspace for ZFS.
>
>Then let your application write your data to that ZFS partition and if 
>you are particular paranoid you can build in a checksum that can be 
>calculated by other machines without the need for the original received 
>data (ZFS has a built-in mechanism for that so you might just want to 
>call that).
>
>There is nothing wrong for assuming a certain level of hardware, well at 
>least not if its very clearly communicated to all parties.
>ZFS is open source (by SUN) but currently only implemented in Solaris, 
>which you also can (commercially) use without charge.
>
>Now you only got to figure out how to implement a heartbeat mechanism 
>between you fail-over applications :-)
			.
			.
			.
Also, the whole idea of basing reliability on HTTP uploads of 50 bytes
at a time sounds to me a bit ... strained.  There *must* be simpler
ways--and simpler goes a long way in the direction of trustworthy.


From jgardner at jonathangardner.net  Fri Feb 17 02:25:35 2006
From: jgardner at jonathangardner.net (Jonathan Gardner)
Date: 16 Feb 2006 23:25:35 -0800
Subject: Databases and python
In-Reply-To: <43f4449f$0$27921$626a54ce@news.free.fr>
References: <pan.2006.02.14.08.06.18.754312@dcs.nac.uci.edu>
	<1140075451.474898.106320@g43g2000cwa.googlegroups.com>
	<43f4449f$0$27921$626a54ce@news.free.fr>
Message-ID: <1140161135.410297.90900@g14g2000cwa.googlegroups.com>

About indexes everywhere: Yes, you don't have to be a DB expert to know
that indexes everywhere is bad. But look at this example. There are
really two ways that the data is going to get accessed in regular use.
Either they are going to ask for all files that have a word (most
likely) or they are going to see which words are in a file.

I'm going to have to name the tables now, aren't I? Here's a simple
schema:

words
--------
word_id
word

files
------
file_id
filename

word_files
--------------
file_id
word_id

If you are going to lookup by word, you'll need an index on words.word.
You'll also need an index on word_files.word_id. And then you'll need
an index on files.file_id.

If you are going to lookup by file, you'll need an index on
files.filename, word_files.file_id, and words.word_id.

So it ends up in this situation you need indexes everywhere.

Now, when you are doing the initial population, you should drop all the
indexes you don't need during population. That means everything but
words.word has to go. (You'll need to find the word_id for previously
seen words.) After the initial population, then is the time to build
and add the indexes. it's much faster to build an index when you have
the entire set of data in front of you than to do it piece-by-piece.
Some indexes actually get built better than they would've piecemeal.

Unfortunately this is no longer strictly topical to Python. But if you
free your mind from thinking in terms of SQL databases and look at
indexes as dicts or whatnot, then you can see that this is really a
general programming problem.



From davecook at nowhere.net  Thu Feb  9 07:38:26 2006
From: davecook at nowhere.net (Dave Cook)
Date: Thu, 09 Feb 2006 12:38:26 GMT
Subject: PyGTK
References: <1139413605.029688.130040@f14g2000cwb.googlegroups.com>
Message-ID: <slrndumdto.g3i.davecook@localhost.localdomain>

On 2006-02-08, Huy <huyslogic at gmail.com> wrote:

> Hi, I'm new to Python, and GUI development, but am no novice to backend
> programming.  Aside from mastering the standard language, I will
> eventually be developing applications dealing with images and controls.
>  Thus forth I have been testing out PyGTK & it appears to be quite
> robust (that and I like the fact of cross-platform compatibility).

This article may be of interest

http://pygtk.org/articles/bitpodder/BitPodder.htm

particularly the last section on how to create an EXE from your pygtk program.

Found at 

http://pygtk.org

Dave Cook


From stefan.behnel-n05pAM at web.de  Thu Feb 23 00:38:28 2006
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Thu, 23 Feb 2006 06:38:28 +0100
Subject: PyUNO with different Python
In-Reply-To: <43fcc038$0$19689$8fcfb975@news.wanadoo.fr>
References: <mailman.2306.1140622912.27775.python-list@python.org>
	<43fcad29$0$29099$5fc30a8@news.tiscali.it>
	<43fcc038$0$19689$8fcfb975@news.wanadoo.fr>
Message-ID: <dtjhn6$fpl$1@lnx107.hrz.tu-darmstadt.de>

M?ta-MCI schrieb:
> The second way don't run:
> 
> Traceback (most recent call last):
>   File "C:\Program Files\OpenOffice.org 2.0\program\hello_world.py", line 1, 
> in?
>     import uno
>   File "C:\Program Files\OpenOffice.org 2.0\program\uno.py", line 37, in ?
>     import pyuno
> ImportError: Module use of python23.dll conflicts with this version of 
> Python.

Sounds like you might want to switch back to Python 2.3 ...

Stefan


From tzot at sil-tec.gr  Tue Feb 14 08:59:47 2006
From: tzot at sil-tec.gr (Christos Georgiou)
Date: Tue, 14 Feb 2006 15:59:47 +0200
Subject: Helpful replies (was Re: python-ldap)
References: <1139330793.864675.302090@f14g2000cwb.googlegroups.com>
	<mailman.1559.1139333846.27775.python-list@python.org>
Message-ID: <dio3v1hnp685d2o5kqc37kv7gauhc3772g@4ax.com>

On Tue, 07 Feb 2006 12:36:11 -0500, rumours say that Steve Holden
<steve at holdenweb.com> might have written:

>btaranto at gmail.com wrote:
>> y0!
>>
>> <question snipped>
>> 
>> tks!
 
>gOOgl3, man
>
>PS: We tend to speak English here :-)

Actually, we tend to speak whatever language the OP's experience suggests. 

I remember the other day, some Humphrey Bogart asked "Are there any waters
in Casablanca?" and some smart-_)_ replied "You know how to google, don't ya
honey?  You just put the little words together and... click search."

I ain't sure if Bogey eventually looked it up.
-- 
TZOTZIOY, I speak England very best.
"Dear Paul,
please stop spamming us."
The Corinthians


From bignose+hates-spam at benfinney.id.au  Mon Feb 27 19:59:51 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 28 Feb 2006 11:59:51 +1100
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>
	<4402AB7F.7070804@REMOVEMEcyber.com.au>
	<7xzmkdxkce.fsf@ruckus.brouhaha.com>
	<pan.2006.02.27.11.09.59.508427@REMOVETHIScyber.com.au>
	<mailman.2485.1141069877.27775.python-list@python.org>
Message-ID: <87oe0sxpq0.fsf@rose.polar.local>

"Terry Reedy" <tjreedy at udel.edu> writes:
> "Steven D'Aprano" <steve at REMOVETHIScyber.com.au> wrote
>> A list is a container.
>
> I think it is misleading, if not wrong, to refer to Python
> collections as 'containers', 'boxes', or similar.  A object in a box
> cannot be in another disjoint box.  A object in a box cannot be in
> the box a second time.  But both 'cannot's are 'can's for Python
> objects in respect to Python collections.  So, bad metaphor.

Thanks. Earlier today I referred to my conceptual model for
enumerations as "container". I agree with you that should be amended
to "collection".

Since an empty enumeration is consistent with the "collection" idiom,
and has obvious behaviour, I see no problem changing the specification
to remove that restriction.

> To me, 'I can't think of a use for X' is insufficient reason to
> prohibit X in Python.

I'm finding that most of the changes I made to the specification
before submitting the initial draft were removing such
restrictions. I'm glad to see that continues :-)

-- 
 \        "Either he's dead or my watch has stopped."  -- Groucho Marx |
  `\                                                                   |
_o__)                                                                  |
Ben Finney


From maxm at mxm.dk  Sat Feb 25 19:23:36 2006
From: maxm at mxm.dk (Max M)
Date: Sun, 26 Feb 2006 01:23:36 +0100
Subject: groupwise send mail
In-Reply-To: <1140798666.437204.81440@z34g2000cwc.googlegroups.com>
References: <1140798666.437204.81440@z34g2000cwc.googlegroups.com>
Message-ID: <4400f44c$0$38695$edfadb0f@dread12.news.tele.dk>

ericoneal at gmail.com wrote:
> Can someone give me an idea as to why this is not working?  The
> Recipients.Add line doesnt cause an error, but my recipients arent
> being used.  The email never gets sent because there is no recipeients.
> 
> Thanks,
> Eric
> 
> 
> import win32com.client
> gwApp = win32com.client.Dispatch('NovellGroupWareSession')
> acct1 = gwApp.Login("NDS:\\Tree_Name","user.context", "")
> oMail = acct1.MailBox.Messages.Add ("GW.Message.Mail", "Draft")
> oMail.fromtext = "Python Hazmat Script"
> oMail.Recipients.Add("doodie at example.com")
> oMail.Subject.PlainText = "Script error"
> oMail.BodyText.PlainText = "The Python Hazmat script failed"
> oMail.send
> gwApp.quit
> 

Methods must allways have a () in Python to be called

 > oMail.send()
 > gwApp.quit()


Otherwise you are just adressing the objects

eg. this is perfectly ok:

send = oMail.send
send()

or

q = gwApp.quit
q()

-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science


From kent at kentsjohnson.com  Thu Feb  9 10:25:16 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Thu, 09 Feb 2006 10:25:16 -0500
Subject: super(...).__init__() vs Base.__init__(self)
Message-ID: <43eb5a9d$1_2@newspeer2.tds.net>

Are there any best practice guidelines for when to use
   super(Class, self).__init__()
vs
   Base.__init__(self)
to call a base class __init__()?

The super() method only works correctly in multiple inheritance when the 
base classes are written to expect it, so "Always use super()" seems 
like bad advice. OTOH sometimes you need super() to get correct 
behaviour. ISTM "Only use super() when you know you need it" might be 
the best advice. Is there any conventional wisdom on this?

The question arises from a naive use of super() in a post on the tutor 
list. This code gives an AttributeError because Base.__init__() is never 
called:

import threading

class Base(object):
   def __init__(self):
     self.x = 1

class Derived(threading.Thread, Base):
   def __init__(self):
     super(Derived, self).__init__()

d=Derived()
d.x

If the order of base classes is reversed, the reference to d.x works but 
of course threading.Thread.__init__() is never called.

1. One way to fix the code is to call Base.__init__() and 
threading.Thread.__init__() explicitly in Derived.__init__().

2. Another fix is for Base.__init__() to call super(Base, 
self).__init__() and to list Base first in the list of base classes. 
This is fragile - it depends on the order of base classes and adding 
another base class would break it.

3. A third fix might be to change both Base and threading.Thread() to 
call super(...).__init__(). This might break existing code that is 
written in the style of fix 1 (calling both base class __init__() 
methods explicitly).

I prefer the first fix, it is explicit and fairly robust - it works if 
the order of bases is changed, and it's pretty clear from the body of 
Derived.__init__() that if you add another base class, you should change 
__init__().

Any other opinions? Any consensus about the "best" way to do this?

BTW I understand what super() does, I know why the original code is 
broken, I'm not asking for help with that. I'm wondering what others 
think best practices are.

Thanks,
Kent


From johnjsal at NOSPAMgmail.com  Fri Feb 17 09:56:12 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 17 Feb 2006 14:56:12 GMT
Subject: embedding python in HTML
In-Reply-To: <43f569b6$1@nntp0.pdx.net>
References: <GD5Jf.1637$No6.38292@news.tufts.edu>
	<t6q9v1p2qcr0ntsau8i6q5glk89pfb4epq@4ax.com>
	<8n6Jf.1640$No6.38203@news.tufts.edu>
	<43f4f98e$0$16930$636a55ce@news.free.fr>
	<bpCdne1jK5jC1GjeRVn-gw@rcn.net> <43f569b6$1@nntp0.pdx.net>
Message-ID: <gulJf.1641$No6.38356@news.tufts.edu>

Kirk McDonald wrote:

> A more common (and bare-metal) approach is CGI. In CGI, a request for a 
> page runs a script, the output of which is the HTML page. I think this 
> only requires that the server has Python installed, which you have said 
> is the case. Python has signifigant standard library support for writing 
> CGI.

Thanks, that makes much more sense to me now. But does this mean I can 
still write HTML normally? What would an example be of having HTML 
within a Python script? I have a hard time picturing this, because I 
imagine that most of my pages will be almost all HTML, with just a bit 
of Python here and there, perhaps to insert headers and footers. Is all 
the HTML just wrapped in a big print statement, or something like that?


From rtilley at vt.edu  Thu Feb  9 07:52:34 2006
From: rtilley at vt.edu (rtilley)
Date: Thu, 09 Feb 2006 07:52:34 -0500
Subject: problems opening IDLE
In-Reply-To: <mailman.1657.1139488298.27775.python-list@python.org>
References: <mailman.1657.1139488298.27775.python-list@python.org>
Message-ID: <dsfdus$r60$1@solaris.cc.vt.edu>

Bennie Tilma wrote:
> I'm having trouble with opening the IDLE and running programs. Every 
> time I try to open it, it says:
> 1. Socket error: Connection refused
> 2. IDLE's subprocess didn't make connection. Either IDLE can't start a 
> subprocess or personal firewall software is blocking the connection.
> 
> Point is, I allready entered python as an exception to my firewall and 
> when I disable it, the messages keep apearing. Can anyone help?

Call idle with the -n option

idle-python2.4 -n
idle.py -n
...



From blair.houghton at gmail.com  Sun Feb  5 03:30:55 2006
From: blair.houghton at gmail.com (Blair P. Houghton)
Date: 5 Feb 2006 00:30:55 -0800
Subject: Does Python support a peek like method for its file objects?
In-Reply-To: <4s3bu1p178o46hh0jcj0eld5git5paog4q@4ax.com>
References: <4s3bu1p178o46hh0jcj0eld5git5paog4q@4ax.com>
Message-ID: <1139128255.279146.33280@z14g2000cwz.googlegroups.com>

Avi Kak wrote:
> Hello:
>
>   Does Python support a peek like method for its file objects?
>
>   I'd like to be able to look at the next byte in a disk file before
>   deciding whether I should read it with, say, the read() method.
>   Is it possible to do so in Python?
>
>   Your answer would be much appreciated.

If it's a seekable file (not a stream input) then you can use
file.tell() to get the current position, then file.read() to read
some data, then file.seek(), giving it the position you got from
file.tell(), to rewind to the same position.  This is the safe version;
in the unsafe version you can skip the file.tell() stuff and just use
relative positioning in the file.seek() operation.

If it's a socket, you can use recv() or recvfrom() if you
set the flags argument to MSG_PEEK.

If it's a stream, you're out of luck, and you'll have to buffer the
data
yourself, although you can use select() or poll() to check on
availability of data if that's what you really want.

At least, in theory.  I haven't tried any of this in Python yet.

--Blair



From jstroud at ucla.edu  Sat Feb 11 19:39:26 2006
From: jstroud at ucla.edu (James Stroud)
Date: Sat, 11 Feb 2006 16:39:26 -0800
Subject: Single-file executables
In-Reply-To: <daadb$43ee6b05$4275d90a$28181@FUSE.NET>
References: <daadb$43ee6b05$4275d90a$28181@FUSE.NET>
Message-ID: <dsm03u$ckg$1@daisy.noc.ucla.edu>

Kevin Walzer wrote:
> Which of the Windows/Unix package builders for Python applications is
> capable of creating single-file executables? I'm thinking of:
> 
> 1. py2exe
> 2. Mcmillan Installer/PyInstaller
> 3. cxfreeze
> 
> The apps I've seen created by py2exe aren't single-file at all, the
> install folder is full of files besides the main program. I'm looking
> for a solution that stuffs all libraries, scripts, and the Python
> runtime into one file.
> 

I use pyinstaller. Its easy and makes a single file, even if you have 
compiled dependencies like pycrypto (I don't think freeze handles these 
so well). If you want ease of installation for windows, check out Inno 
Setup. It gives a single downloadable installer that helps get around 
the "unknown publisher" problem, and system registry editing. In 
summary: pyinstaller + inno setup.

James


From fuzzyman at gmail.com  Wed Feb 22 19:20:40 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 22 Feb 2006 16:20:40 -0800
Subject: ConfigParser and unicode: a simple solution?
In-Reply-To: <mailman.2326.1140652979.27775.python-list@python.org>
References: <43FCE8DD.5060303@niessink.com>
	<mailman.2326.1140652979.27775.python-list@python.org>
Message-ID: <1140654040.312866.255390@g47g2000cwa.googlegroups.com>


Terry Hancock wrote:
> On Wed, 22 Feb 2006 23:42:37 +0100
> Frank Niessink <frank at niessink.com> wrote:
> > I'm using ConfigParser to read and write simple
> > configuration files.
> >
> > However, filenames may not be simple ascii strings, but
> > can very well be
> >   unicode strings.
> http://www.google.com/search?hl=en&q=ConfigParser+unicode&btnG=Google+Search
>
> First hit identifies "ConfigObj", and a few links later gets
> you the home page and Sourceforge project page:
>
> http://www.voidspace.org.uk/python/configobj.html
> http://sourceforge.net/projects/configobj
>

Hey cool, I didn't even have to promote it myself ;-)

The 4.2.0 release has full unicode support, this isn't *yet* up on
sourceforge, but will be as soon as I get a moment. In the meantime the
new release is available from the homepage.

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml

> --
> Terry Hancock (hancock at AnansiSpaceworks.com)
> Anansi Spaceworks http://www.AnansiSpaceworks.com



From bencvt at gmail.com  Tue Feb 28 01:32:40 2006
From: bencvt at gmail.com (Ben Cartwright)
Date: 27 Feb 2006 22:32:40 -0800
Subject: changing params in while loop
In-Reply-To: <1141089374.340287.266970@u72g2000cwu.googlegroups.com>
References: <1141089374.340287.266970@u72g2000cwu.googlegroups.com>
Message-ID: <1141108360.417776.228940@e56g2000cwe.googlegroups.com>

robin wrote:
> i have this function inside a while-loop, which i'd like to loop
> forever, but i'm not sure about how to change the parameters of my
> function once it is running.
> what is the best way to do that? do i have to use threading or is there
> some simpler way?


Why not just do this inside the function?  What exactly are you trying
to accomplish here?  Threading could work here, but like regexes,
threads are not only tricky to get right but also tricky to know when
to use in the first place.

That being said, here's some example threading code to get you started
(PrinterThread.run is your function; the ThreadSafeStorage instance
holds your parameters):

import threading
import time

class ThreadSafeStorage(object):
    def __init__(self):
        object.__setattr__(self, '_lock', threading.RLock())
    def acquirelock(self):
        object.__getattribute__(self, '_lock').acquire()
    def releaselock(self):
        object.__getattribute__(self, '_lock').release()
    def __getattribute__(self, attr):
        if attr in ('acquirelock', 'releaselock'):
            return object.__getattribute__(self, attr)
        self.acquirelock()
        value = object.__getattribute__(self, attr)
        self.releaselock()
        return value
    def __setattr__(self, attr, value):
        self.acquirelock()
        object.__setattr__(self, attr, value)
        self.releaselock()

class PrinterThread(threading.Thread):
    """Prints the data in shared storage once per second."""
    storage = None
    def run(self):
        while not self.storage.killprinter:
            self.storage.acquirelock()
            print 'message:', self.storage.message
            print 'ticks:', self.storage.ticks
            self.storage.ticks += 1
            self.storage.releaselock()
            time.sleep(1)

data = ThreadSafeStorage()
data.killprinter = False
data.message = 'hello world'
data.ticks = 0
thread = PrinterThread()
thread.storage = data
thread.start()
# do some stuff in the main thread
time.sleep(3)
data.acquirelock()
data.message = 'modified ticks'
data.ticks = 100
data.releaselock()
time.sleep(3)
data.message = 'goodbye world'
time.sleep(1)
# notify printer thread that it needs to die
data.killprinter = True
thread.join()

# output:
"""
message: hello world
ticks: 0
message: hello world
ticks: 1
message: hello world
ticks: 2
message: modified ticks
ticks: 100
message: modified ticks
ticks: 101
message: modified ticks
ticks: 102
message: goodbye world
ticks: 103
"""

--Ben



From ian at excess.org  Fri Feb 10 15:14:00 2006
From: ian at excess.org (Ian Ward)
Date: Fri, 10 Feb 2006 15:14:00 -0500
Subject: Replacing curses
In-Reply-To: <1139498737.281215.106510@o13g2000cwo.googlegroups.com>
References: <mailman.1566.1139345769.27775.python-list@python.org>
	<43E9234B.6030108@v.loewis.de>
	<mailman.1588.1139372460.27775.python-list@python.org>
	<11uk55h47lruk18@corp.supernews.com>
	<mailman.1611.1139422272.27775.python-list@python.org>
	<11ukf0ci8d6ac64@corp.supernews.com>
	<mailman.1620.1139429435.27775.python-list@python.org>
	<11ul1mgplrah63e@corp.supernews.com>
	<1139451439.115775.223250@g43g2000cwa.googlegroups.com>
	<mailman.1642.1139461214.27775.python-list@python.org>
	<1139498737.281215.106510@o13g2000cwo.googlegroups.com>
Message-ID: <43ECF408.2000905@excess.org>

Ross Ridge wrote:
> In general it's impossible to know how many display positions some
> random Unicode character might use.  For example, Chinese characters
> normally take two display positions, but the terminal your using might
> not support them and display a single width replacement character.
> Hopefully, you're limitted in the character set you actually need to
> support and the terminals that your applicaiton will be using.

I'm not so lucky -- I'm writing a console UI library (Urwid) that anyone 
could use, and I'm trying to support as many encodings and terminals as 
possible.

I hope that the different terminal behaviors can be enumerated so that 
the console interface will degrade gracefully with less capable 
terminals.  The mined_2000 unicode text editor is a program that does 
this by detecting the terminal's behavior on startup. I'll probably take 
a similar approach.

Ian Ward




From userprogoogle-139 at yahoo.co.uk  Thu Feb  9 04:59:23 2006
From: userprogoogle-139 at yahoo.co.uk (rodmc)
Date: 9 Feb 2006 01:59:23 -0800
Subject: PyGTK
References: <1139413605.029688.130040@f14g2000cwb.googlegroups.com>
Message-ID: <1139479163.424080.126780@g43g2000cwa.googlegroups.com>

Well I have just started using Python and have found wxPython to be
pretty good, it is built upon the WxWindows framework.It is also
cross-platform. You can find it at www.wxpython.org.

It appears to be easy to understand and there are a few GUI builder
tools around for it as well.

Rod



From steve at REMOVETHIScyber.com.au  Thu Feb 23 17:14:53 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 24 Feb 2006 09:14:53 +1100
Subject: A C-like if statement
References: <hp-dnY20cusOnGPeRVn-rg@nmt.edu> <dtl04p$5q2$1@reader2.panix.com>
	<sdadnS6nfNnbmmPeRVn-sw@nmt.edu>
Message-ID: <pan.2006.02.23.22.14.53.56541@REMOVETHIScyber.com.au>

On Thu, 23 Feb 2006 12:04:38 -0700, Bob Greschke wrote:

>> try:
>>    i = a.find("3")
>>    print "It's here: ", i
>> except NotFound:
>>    print "No 3's here"
> 
> Nuts.  I guess you're right.  It wouldn't be proper.  Things are added or 
> proposed every day for Python that I can't even pronounce, but a simple 'if 
> (I = a.find("3")) != -1' isn't allowed.  Huh.  It might be time to go back 
> to BASIC. :)

There are *reasons* why Python discourages functions with side-effects.
Side-effects make your code hard to test and harder to debug.

> I think your way would work if .find() were replaced with .index().  I'm 
> just trying to clean up an if/elif tree a bit, so using try would make 
> things bigger.

Then write a function! Instead of calling the try..except block in every
branch directly, pull it out into a function:

def test(s,what):
    try:
        i = s.index(what)
        print "It's here: ", i
    except ValueError:
        print "No 3's here"


-- 
Steven.



From aleaxit at yahoo.com  Sun Feb  5 14:51:52 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 5 Feb 2006 11:51:52 -0800
Subject: Get System Date?
References: <1139161771.537069.181010@g44g2000cwa.googlegroups.com>
Message-ID: <1haabhb.16w9eqh1lggjmsN%aleaxit@yahoo.com>

Dustan <DustanGroups at gmail.com> wrote:

> Is it possible to get the system date on a Windows XP machine? Most
> Convenient would to retrieve YYYY, MM, and DD as seperate variables.
> 
> When I say system date, I'm thinking of the small clock in the
> lower-right hand corner, which has date as well as time, but if there's
> another clock that Python supports, it works for me as long as it's
> somewhat accurate.

>>> import datetime
>>> x=datetime.date.today()
>>> yyyy, mm, dd = x.year, x.month, x.day
>>> print yyyy
2006
>>> print mm
2
>>> print dd
5
>>> 

As you see, these are integers (so, for example, mm is not '02' but just
2).  Pretty easy to make them into strings, of course, if you want.


Alex


From l.exsteens at gmail.com  Thu Feb  2 13:05:08 2006
From: l.exsteens at gmail.com (Laurent)
Date: 2 Feb 2006 10:05:08 -0800
Subject: my openGL API need threads!!! But how to ,ake it work???
In-Reply-To: <44eun8F1rpr2U1@uni-berlin.de>
References: <1138883972.001578.149350@g44g2000cwa.googlegroups.com>
	<1138889819.536105.57620@g47g2000cwa.googlegroups.com>
	<44ekogF1oeqgU1@uni-berlin.de>
	<1138901385.767694.288170@g49g2000cwa.googlegroups.com>
	<44eun8F1rpr2U1@uni-berlin.de>
Message-ID: <1138903508.151933.14440@g14g2000cwa.googlegroups.com>

threading.Thread(target = Scene.run).start()   WORKS !!!

great thx ;)

now this should be better if the thread can ben declared inside the
class!



From steve at REMOVETHIScyber.com.au  Sun Feb 12 01:59:20 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sun, 12 Feb 2006 17:59:20 +1100
Subject: Clearing the screen
References: <1139688262.046667.296940@g14g2000cwa.googlegroups.com>
	<mailman.1761.1139688853.27775.python-list@python.org>
	<1139725568.890659.253770@f14g2000cwb.googlegroups.com>
Message-ID: <pan.2006.02.12.06.59.19.550394@REMOVETHIScyber.com.au>

On Sat, 11 Feb 2006 22:26:08 -0800, mwt wrote:

> I can't seem to get that to behave properly. It works fine in a python
> shell, like you're demonstrating it, but not as a command in a module.

Would you like to tell us how you are using it and what happens when you
do, or would you like us to guess? Because it works for me, both as a
stand-alone script:

$ cat clear.py
magic = "\x1b[H\x1b[2J"

def clear():
    print magic

if __name__ == "__main__":
    clear()

$ python clear.py


and also from inside Python as a module:

>>> import clear
>>> clear.clear()




-- 
Steven.



From uymqlp502 at sneakemail.com  Tue Feb 21 01:22:34 2006
From: uymqlp502 at sneakemail.com (Russ)
Date: 20 Feb 2006 22:22:34 -0800
Subject: deriving from float or int
Message-ID: <1140502954.660120.174160@g14g2000cwa.googlegroups.com>

Does it ever make sense to derive a class from a basic type such as
float or int? Suppose, for example, that I want to create a class for
physical scalars with units. I thought about deriving from float, then
adding the units. I played around with it a bit, but it doesn't seem to
work very well. Am I missing something here? Thanks.



From rainbow.cougar at gmail.com  Wed Feb  8 15:04:54 2006
From: rainbow.cougar at gmail.com (rainbow.cougar at gmail.com)
Date: 8 Feb 2006 12:04:54 -0800
Subject: Too Many if Statements?
In-Reply-To: <dscc9e$4mg$1@oravannahka.helsinki.fi>
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<dsaqkj$jhm$1@xenon.Stanford.EDU>
	<GU8Gf.22899$Jd.6095@newssvr25.news.prodigy.net>
	<dscc9e$4mg$1@oravannahka.helsinki.fi>
Message-ID: <1139429094.744499.258170@o13g2000cwo.googlegroups.com>


> > I made a script with 100,000 if's, (code below) and it appears
> > to work on a couple systems, including Python 2.4.2 on Win32-XP.
> > So at first cut, it doesn't seem to be just the if-count that
> > triggers the bug.
>
> I tried that code. It runs fine.
>
> However, the following gives a SystemError with only 2500 elif's.
>
>...
>
> I tried this with Python 2.3.3 and 2.3.4 (Linux) and both fail.

Just tried it with 2.4.2 On FreeBSD 6.0 and I get the same result:

Traceback (most recent call last):
  File "buggyif.py", line 10, in ?
    exec prog 
SystemError: com_backpatch: offset too large

Curtis



From ivanf1 at comcast.net  Fri Feb  3 19:44:31 2006
From: ivanf1 at comcast.net (nitro)
Date: 3 Feb 2006 16:44:31 -0800
Subject: cannot install scipy
Message-ID: <1139013871.122256.202130@g43g2000cwa.googlegroups.com>

Hi,

I am using a Debian system. I installed NumPy and everything works
well. When I try to install SciPy, I get the following error. Any help
would be appreciated.

===
idf at server1:~/scipy/scipy-0.4.4$ python setup.py install
import core -> failed:
/usr/lib/python2.3/site-packages/numpy/core/multiarray.so: undefined
symbol: PyOS_ascii_strtod
import random -> failed: 'module' object has no attribute 'dtype'
import lib -> failed:
/usr/lib/python2.3/site-packages/numpy/core/multiarray.so: undefined
symbol: PyOS_ascii_strtod
Fatal Python error: can't initialize module lapack_lite
Aborted
idf at server1:~/scipy/scipy-0.4.4$
===

nitro



From jeff at schwabcenter.com  Sat Feb 11 11:55:44 2006
From: jeff at schwabcenter.com (Jeffrey Schwab)
Date: Sat, 11 Feb 2006 16:55:44 GMT
Subject: Shortest prime number program
In-Reply-To: <1139673716.241461.84110@g47g2000cwa.googlegroups.com>
References: <1139652226.869102.310180@g14g2000cwa.googlegroups.com>
	<1139673716.241461.84110@g47g2000cwa.googlegroups.com>
Message-ID: <kGoHf.11700$915.6920@southeast.rr.com>

dickinsm at gmail.com wrote:
> swisscheese wrote:
> 
>>r=range(2,99)
>>m=[x*y for x in r for y in r]
>>[x for x in r if not x in m]
> 
> 
> How about:
> 
> [2]+[x for x in range(1,99) if 2**x%x==2]

43.

I'll be chewing on this one for a while.  Thank you. :)


From bob at passcal.nmt.edu  Wed Feb  8 17:45:24 2006
From: bob at passcal.nmt.edu (Bob Greschke)
Date: Wed, 8 Feb 2006 15:45:24 -0700
Subject: Tkinter, X-windows and ebay
Message-ID: <1tqdncP3Ps7s6XfenZ2dnUVZ_tGdnZ2d@nmt.edu>

When you post something on eBay (and other places) you can use a 'browse' 
button on a web page to send a picture file from your hard drive to them for 
inclusion in your listing.  Can the same kind of thing (not the same exact 
thing, of course) be done with a Python/Tkinter program that is running on a 
remote machine (that you logged into to start the program), but that's just 
using your computer's display (with X11 on a Mac, X-whatever on Linux, 
X-Win32 on Windows, etc.)?  I've got an inventory program that runs this way 
and it would be nice if users could create a text file on their machine, but 
then have the program read that file and, for example, update item 
quantities according to information in that file.  Things like that.

Thanks!

Bob




From gregory.petrosyan at gmail.com  Wed Feb 22 18:02:11 2006
From: gregory.petrosyan at gmail.com (Gregory Petrosyan)
Date: 22 Feb 2006 15:02:11 -0800
Subject: What's up with this code?
Message-ID: <1140649331.924736.128420@g43g2000cwa.googlegroups.com>

Hello, it's me again.
I am trying to optimise small module for working with polynomials, and
I have encountered problem: new, optimised, code, doesn't work in some
specific case. Here's the old version of the code:

(3x^2 + 2x + 1  <=>  poly([3, 2, 1]), btw)

    def __add__(self, other):
        "Return sum of two polynomials"
        rcoefs1 = list(reversed(self.coefs))
        rcoefs2 = list(reversed(other.coefs))
        coefs = [c1+c2 for c1,c2 in zip(rcoefs1, rcoefs2)]
        minlen = min(len(rcoefs1), len(rcoefs2))
        coefs.extend(rcoefs1[minlen:] + rcoefs2[minlen:])
        return Polynomial(reversed(coefs))

Here's the new version:

    def __add__(self, other):
        rcoefs1 = reversed(self.coefs)
        rcoefs2 = reversed(other.coefs)
        coefs = [c1+c2 for c1,c2 in it.izip(rcoefs1, rcoefs2)]
        coefs.extend(it.chain(rcoefs1, rcoefs2)) #? -- here is magic
        if coefs[-1] != 0:
            return Polynomial(reversed(coefs), False, False)
        else:
            return Polynomial(reversed(coefs), False)

Last four lines are ok (tested), "magic" seems to occure in #? line.
What's the magic? Here it is:

poly([1,2,1]) + poly([1,-2,1]) is ok,
poly([1,-2,1]) + poly([5,4,3,2,1]) is ok,
poly([1]) + poly([2]) is ok,
poly([1,2,1]) + poly([5,4,3,2,1]) is ok, but

poly([1,0]) + poly([-1])  gives poly([-1]),
poly([1,-3]) + poly([-2]) gives poly([-5]) etc.

So, "magic" happens when processing something like poly([a,b]) +
poly([c]) and it gives poly([b+c]) as result. Can anybody help me with
it?

Regards, Gregory.



From nick at craig-wood.com  Mon Feb 13 06:30:04 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 13 Feb 2006 05:30:04 -0600
Subject: pythonic exec* spawn*
References: <mailman.1686.1139521339.27775.python-list@python.org>
Message-ID: <slrndv0omc.kjn.nick@irishsea.home.craig-wood.com>

Daniel Nogradi <nogradi at gmail.com> wrote:
>  Is it possible to pass a python object to a python program as
>  argument?

Yes - you can pickle it.

  http://www.python.org/doc/2.4.2/lib/module-cPickle.html

You can pickle just about anything into a string and unpickle it back
into python objects.  You shouldn't accept pickles from untrusted
sources as this may reperesent a security problem.

>  In my program I would like to start executing an other python program
>  and don't wait until that finishes, only launch it and keep running
>  the original program. The obvious way I can think of it is using the
>  exec* or spawn* function families. However, these are generic
>  functions to start any external program and I was wondering if there
>  was a special way to start a python program (as opposed to an
>  arbitrary program), especially because I would like to pass data to
>  this other program in the form of python objects.
> 
>  While the original program is running it creates all sorts of data in
>  a nice pythonic way, for example as a class instance with lot of
>  member data, and then I wouldn't want to convert all of this into
>  command line arguments because that would create a huge list. I would
>  like to pass the whole object at once to the second python program
>  which should start doing its thing with it while the original program
>  should keep running.
> 
>  I was looking around for threading and forking but couldn't come up
>  with a clear solution.

If you want to fork(), then I would use the subprocess module to
create a child process with a pipe to it.  I would then pass python
objects as pickles back and forth across that pipe.

  http://www.python.org/doc/2.4.2/lib/module-subprocess.html

You'll probably find threading easier though.

  http://www.python.org/doc/2.4.2/lib/module-threading.html

But it will use your multiple CPUs less efficiently than fork()-ing.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From fredrik at pythonware.com  Wed Feb  1 12:06:33 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 1 Feb 2006 18:06:33 +0100
Subject: unicodedata.name
References: <1138812201.763863.243720@o13g2000cwo.googlegroups.com>
Message-ID: <drqpqr$hbr$1@sea.gmane.org>

Szabolcs Nagy wrote:

> the unicodedata manual sais:
> "
> name(  unichr[, default])
>     Returns the name assigned to the Unicode character unichr as a
> string. If no name is defined, default is returned, or, if not given,
> ValueError is raised.
> "
> what is the difference between "no name defined" and "not given"?

"no name is defined" refers to the unicode database, "not given"
refers to the default argument.  if you don't specify a default, and
the character don't have a known name, you get a ValueError.

> eg. '\n' why gives a ValueError?
>
> >>> unicodedata.name(u'\n')
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> ValueError: no such name

the Unicode standard doesn't specify names for control characters.

</F>





From adonisv at DELETETHISTEXTearthlink.net  Thu Feb  9 18:07:43 2006
From: adonisv at DELETETHISTEXTearthlink.net (Adonis)
Date: Thu, 09 Feb 2006 23:07:43 GMT
Subject: Tkinter, X-windows and ebay
In-Reply-To: <1tqdncP3Ps7s6XfenZ2dnUVZ_tGdnZ2d@nmt.edu>
References: <1tqdncP3Ps7s6XfenZ2dnUVZ_tGdnZ2d@nmt.edu>
Message-ID: <3XPGf.13160$rH5.10752@newsread2.news.atl.earthlink.net>

Bob Greschke wrote:
> When you post something on eBay (and other places) you can use a 'browse' 
> button on a web page to send a picture file from your hard drive to them for 
> inclusion in your listing.  Can the same kind of thing (not the same exact 
> thing, of course) be done with a Python/Tkinter program that is running on a 
> remote machine (that you logged into to start the program), but that's just 
> using your computer's display (with X11 on a Mac, X-whatever on Linux, 
> X-Win32 on Windows, etc.)?  I've got an inventory program that runs this way 
> and it would be nice if users could create a text file on their machine, but 
> then have the program read that file and, for example, update item 
> quantities according to information in that file.  Things like that.
> 
> Thanks!
> 
> Bob
> 
> 

This is not a full answer to your question, but an idea, just so happens 
last few days I have been playing with ssh clients (putty, ssh) X11 
Forwarding with success. Essentially the user would run their preferred 
X, ssh to the server with X11 forwarding enabled to their host address 
and they can run programs like Xterm or even Nautilus, most X programs 
and it will be forwarded to their X server over a secured connection. To 
address the users file system maybe try setting up a file server on the 
Linux system referring to the users home directory, the user then 
creates a reference to the file server, then now it may mimic a "local" 
feel but all on your Linux server. Now they can run the X app and be 
able to achieve what you want. I am in no way an expert and some of my 
ideas might not be 100% accurate, but at my university this is how we 
have it set and it works perfectly (a very mixed environment as well).

Just an idea, hope this helps.

Adonis


From reckoner at gmail.com  Wed Feb 22 15:01:28 2006
From: reckoner at gmail.com (Jose  Reckoner)
Date: 22 Feb 2006 12:01:28 -0800
Subject: quick script to read digital terrain elevation data?
Message-ID: <1140636896.760894.311440@g47g2000cwa.googlegroups.com>


I'm running python 2.3 on Windows XP. Anyone have a quick small script
to convert .DT1 and .DEM data to ASCII or some other format? I don't
need a viewer.

Thanks!



From mehmetmutigozel at gmail.com  Tue Feb 28 07:50:55 2006
From: mehmetmutigozel at gmail.com (mehmetmutigozel at gmail.com)
Date: 28 Feb 2006 04:50:55 -0800
Subject: compiled program input
Message-ID: <1141131055.777748.153150@v46g2000cwv.googlegroups.com>


i have a compiled program named m.exe. when i execute it asks me to
enter a parameter like "me.dat". the coder didn't manage the argv for
this program and i only have the executable.

is there a vay to call this executeable from python and give parameters
to it?

>m.exe
>input1 ? me.dat
>....

something like this



From ang27 at bb.com  Tue Feb  7 00:12:47 2006
From: ang27 at bb.com (ang27 at bb.com)
Date: 07 Feb 2006 05:12:47 GMT
Subject: Best Job Search Site...
Message-ID: <43e82c4f$4$5470$bb8e7a08@news.usenetcompany.com>

--_NextPart_00009763-00000059-0BDBD09A-1D04
Content-Type: text/plain
Content-Transfer-Encoding: 7bit

If you are looking for a job or know someone who is then check out the hot jobs
section of http://www.2spendless.com! This site really helped me.
--_NextPart_00009763-00000059-0BDBD09A-1D04--


From techiepundit at futurepundit.com  Wed Feb  1 13:47:46 2006
From: techiepundit at futurepundit.com (Randall Parker)
Date: 1 Feb 2006 10:47:46 -0800
Subject: Python vs C for a mail server
In-Reply-To: <donn-FA6F36.09312101022006@gnus01.u.washington.edu>
References: <mailman.3994.1138546139.27774.python-list@python.org>
	<mailman.1197.1138549204.27775.python-list@python.org>
	<1138728303.669646.36940@g49g2000cwa.googlegroups.com>
	<drqa42$8k8$1@wake.carmen.se>
	<1138805854.533303.279610@g49g2000cwa.googlegroups.com>
	<donn-FA6F36.09312101022006@gnus01.u.washington.edu>
Message-ID: <1138819666.521465.108000@o13g2000cwo.googlegroups.com>

Donn,

More generally: One must keep in mind that advantages and disadvantages
of specific implementations of language concepts are not always
indications of flaws in those concepts. Real languages have real flaws
from bad design choices which cause them to fall short of what those
languages could achieve.

My own experience with Python and C++ is that C++ could be improved to
gain it at least some of Python's advantages. After programming in
Python for a while and then switching back to C++ my reaction is that
C++ needs some features added to its syntax and to its RTL to make it
easier to do some of the things that are much easier to do in Python.

Also, a lot of C++'s flaws flow from the fact that it is old and grew
in lots of increments.

In my experience the overhead of explicitly deleting objects in C/C++
is not the big burden that some argue here is the biggest reason to use
Python instead of C++. I find Python easier to use more for how it
implements lists, dictionaries, standard libs for things like sockets,
and other areas which require more work and less portability in C++.

C++ needs a new standard toolbox and some new keywords to make loops
and other things easier to do.

Donn Cave wrote:
> In article <1138805854.533303.279610 at g49g2000cwa.googlegroups.com>,
> ...
> > Granted, it is a pain to change type declarations.
>
> I see it is time for the bi-monthly reminder that C++ is not
> the ideal example of strong static typing, unless you just
> want to make it look bad.  Cf. Hindley-Milner type inference.
> 
>    Donn Cave, donn at u.washington.edu



From sw at wordtech-software.com  Sat Feb 11 17:53:57 2006
From: sw at wordtech-software.com (Kevin Walzer)
Date: Sat, 11 Feb 2006 17:53:57 -0500
Subject: Single-file executables
Message-ID: <daadb$43ee6b05$4275d90a$28181@FUSE.NET>

Which of the Windows/Unix package builders for Python applications is
capable of creating single-file executables? I'm thinking of:

1. py2exe
2. Mcmillan Installer/PyInstaller
3. cxfreeze

The apps I've seen created by py2exe aren't single-file at all, the
install folder is full of files besides the main program. I'm looking
for a solution that stuffs all libraries, scripts, and the Python
runtime into one file.

-- 
Kevin Walzer
iReveal: File Search Tool
http://www.wordtech-software.com


From claudio.grondi at freenet.de  Mon Feb 13 20:07:41 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Tue, 14 Feb 2006 02:07:41 +0100
Subject: Python 2.4.2 and Berkeley DB 4.4.20 ?
In-Reply-To: <1139874754.693654.229830@o13g2000cwo.googlegroups.com>
References: <1139874754.693654.229830@o13g2000cwo.googlegroups.com>
Message-ID: <dsragt$75p$1@newsreader3.netcologne.de>

Damjan wrote:
> This is from the Slackware-current changelog:
> 
> d/python-2.4.2-i486-1.tgz: Upgraded to python-2.4.2.
>        The bsddb module didn't build against the new 4.4.x version of
>        Berkeley DB. Does anyone care? Or perhaps have a patch? :-)
> 
> Does anyone have a suggestion?
> 
I have faced this problem when compiling python-2.4.2, too.
Going back some versions of bsddb to db-4.3.27.zip solved that problem 
for me.

Claudio


From peter at engcorp.com  Thu Feb  9 10:04:02 2006
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 09 Feb 2006 10:04:02 -0500
Subject: Thread Dump of a python process
In-Reply-To: <2840609.post@talk.nabble.com>
References: <2840609.post@talk.nabble.com>
Message-ID: <dsflkk$k69$1@sea.gmane.org>

Shanon wrote:
> I would to know if there're some way to have a dump of all the threads
> started by a python process. I want to see the TID corresponding of each
> thread because I need them to get the CPU time of each thread by the command
> top.

threading.enumerate() will return a list of all threading.Thread objects 
that have been created (including the main one), but Thread's do not 
currently store the identified of the underlying thread (created by a 
call to thread.start_new_thread().  You could easily subclass Thread to 
provide your own .start() which does that, and perhaps modify __repr__ 
to output that instead of the id() value.

Check the source in threading.py if this approach sounds useful.

-Peter



From johnpote at blueyonder.co.uk  Thu Feb  9 18:45:01 2006
From: johnpote at blueyonder.co.uk (John Pote)
Date: Thu, 09 Feb 2006 23:45:01 GMT
Subject: Hi reliability files, writing,reading,maintaining
References: <fhGGf.274074$vl2.129103@fe2.news.blueyonder.co.uk>
	<43eb4480$0$11064$e4fe514c@news.xs4all.nl>
	<ktpsb3-avr.ln1@lairds.us>
Message-ID: <1uQGf.274691$vl2.62908@fe2.news.blueyonder.co.uk>

Thanks for all the replies,

> <cut from Cameron Laird>
> Also, the whole idea of basing reliability on HTTP uploads of 50 bytes
> at a time sounds to me a bit ... strained.  There *must* be simpler
> ways--and simpler goes a long way in the direction of trustworthy.
>

The motivation to look at http: is the widespread avaiability of internet 
connections and standard servers able to run CGI scripts. In particular the 
availability of low cost GPRS modems (solar panel and/or wind gen) is very 
attractive for remote locations where there is  no power, telephone line or 
cable company.

However, I take your point about HTTP uploads of 50 or so bytes is a little 
overhead heavy. Recently I've come to know of reasonably priced fully 
managed dedicated servers in secure buildings. So I am now thinking of a 
direct TCP/IP port connection. I know Python can do this as I found the 
appropriate standard modules and set up a simple proving system on my 
private network (one port listener, one sender - no problem!). Are there 
security issues in this approach?

I realise http: reliability is not a great as it might be but we have a 
reasonable amount of time for re-tries (an hour or two) if some packets get 
lost. My recent experience of telneting to our server in London (I'm in the 
midlands) is quite revealing. Round trip time is generally sub .5 sec. Makes 
me think all that waiting for web pages is the server rather than the 
internet itself.

Any thoughts on *simpler* ways to achieve my goal of remote data to web 
servers greatly appriciated.

It would still be useful to have anyones thoughts on securely writing the 
data to disk files. The off the shelf "military" approach suggested by 
Martin Hellwig is outside our budget.

Thanks again.

John

"Cameron Laird" <claird at lairds.us> wrote in message 
news:ktpsb3-avr.ln1 at lairds.us...
> In article <43eb4480$0$11064$e4fe514c at news.xs4all.nl>,
> Martin P. Hellwig <mhellwig at xs4all.nl> wrote:
>>John Pote wrote:
>><cut>
>>> So my request:
>>> 1. Are there any python modules 'out there' that might help in securely
>>> writing such files.
>>> 2. Can anyone suggest a book or two on this kind of file management. 
>>> (These
>>> kind of problems must have been solved in the financial world many 
>>> times).
>>>
>><cut>
>>I can't answer your specific questions but I got the feeling that you're
>>  barking at the wrong tree ;-)
>>
>>You don't want to solve this in you application, file management is what
>>the OS and hardware is about. "Military" grade solutions are often
>>(depending on their criticalness) double or triple hot spares in the
>>same room which can be seen as a "unit" and these units are duplicated
>>on remote locations (at least 25km of each other) syncing their data
>>with standard tools like rsync.
>>
>>If you don't have military budget, I would suggest to do it a little
>>less expensive, like having a couple of Solaris machines (three or four
>>will do it) in the same room, using a part of their diskspace for ZFS.
>>
>>Then let your application write your data to that ZFS partition and if
>>you are particular paranoid you can build in a checksum that can be
>>calculated by other machines without the need for the original received
>>data (ZFS has a built-in mechanism for that so you might just want to
>>call that).
>>
>>There is nothing wrong for assuming a certain level of hardware, well at
>>least not if its very clearly communicated to all parties.
>>ZFS is open source (by SUN) but currently only implemented in Solaris,
>>which you also can (commercially) use without charge.
>>
>>Now you only got to figure out how to implement a heartbeat mechanism
>>between you fail-over applications :-)
> .
> .
> .
> Also, the whole idea of basing reliability on HTTP uploads of 50 bytes
> at a time sounds to me a bit ... strained.  There *must* be simpler
> ways--and simpler goes a long way in the direction of trustworthy. 




From http  Thu Feb 16 01:09:08 2006
From: http (Paul Rubin)
Date: 15 Feb 2006 22:09:08 -0800
Subject: any ftpd written in python?
References: <mailman.1990.1140070096.27775.python-list@python.org>
Message-ID: <7xwtfvomwr.fsf@ruckus.brouhaha.com>

Kenneth Xie <mailinglist4ken at gmail.com> writes:
> I need a simple ftpd example in pure python. Is there already such a
> ftpd available?

www.twistedmatrix.com


From nospam at parasites.com  Sun Feb  5 09:05:26 2006
From: nospam at parasites.com (Keith MacDonald)
Date: Sun, 5 Feb 2006 14:05:26 -0000
Subject: Interpreting Unicode scripts
Message-ID: <S7WdnXWtGeCAm3veRVny1g@pipex.net>

Hello,

I am considering embedding Python in a C++ application, which works 
internally in UTF-16.  The only API I can find for running scripts is 
PyRun_SimpleString(const char*).  Does that mean that Python is unable to 
execute scripts containing characters from more than one code page?

Thanks,
Keith MacDonald 




From sudharsh at gmail.com  Wed Feb 22 07:40:30 2006
From: sudharsh at gmail.com (sudharsh at gmail.com)
Date: 22 Feb 2006 04:40:30 -0800
Subject: Video Capture modules in linux
In-Reply-To: <46134sF8rjpdU1@uni-berlin.de>
References: <1140536025.234765.309040@z14g2000cwz.googlegroups.com>
	<mailman.2244.1140537067.27775.python-list@python.org>
	<1140537926.084128.66160@g44g2000cwa.googlegroups.com>
	<46134sF8rjpdU1@uni-berlin.de>
Message-ID: <1140612030.562664.206780@g47g2000cwa.googlegroups.com>

ok..i'll check with that...but wait libfg binaries arent available in
any software repos..and Diez, I would like to mention that there is a
VideoCapture lib exclusively for python..(only that its for win32)..
>So - that _is_ a
>C-domain.

So can i kinda embed that code into C using the libraries that are
available..plz guyz any links would be appreciated

Sudharshan S



From fredrik at pythonware.com  Wed Feb 15 11:50:19 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 15 Feb 2006 17:50:19 +0100
Subject: kwargs keyword evaluation
References: <1140021611.026892.85790@f14g2000cwb.googlegroups.com>
Message-ID: <dsvm4e$g36$1@sea.gmane.org>

tzellman at gmail.com wrote:

> Let's assume I have a function that makes good use of the kwargs
> parameter. It requires that there is a certain "format" for the kwargs
> keywords. (I am using Django, btw). The format is like such:
> "SOMEVAL__exact", etc., where SOMEVAL is some value that it parses from
> the keyword.
>
> Now, I want to call this function, specifying the kwargs. The problem
> is that I want to dynamically set the kwargs. For example, I don't want
> to hard code in the name like such:
>     function_call(name__exact="Tom")
>
> I want to generate the keyword on the fly. So, I want to do this:
> (assume someVar == 'name' for now)
> keyword = someVar + "__exact"
>
> The problem:
> I need to know how to get it to use the VALUE of the keyword for the
> keyword.
>
> My thoughts:
> (1) Maybe I can override the kwargs parameter by doing such:
> function_call(kwargs={keyword:"Tom"})
> *loud buzzer* Nope. (as expected)

    function_call(**{keyword:"Tom"})

</F>





From python at rcn.com  Fri Feb 17 06:25:27 2006
From: python at rcn.com (Raymond Hettinger)
Date: 17 Feb 2006 03:25:27 -0800
Subject: getting the line just before or after a pattern searched
In-Reply-To: <1140146668.313276.91380@g43g2000cwa.googlegroups.com>
References: <1140146668.313276.91380@g43g2000cwa.googlegroups.com>
Message-ID: <1140175527.104165.280120@o13g2000cwo.googlegroups.com>

s99999999s2003 at yahoo.com wrote:
> hi
>
> i have a file something like this
>
> abcdefgh
> ijklmnopq
> 12345678
> rstuvwxyz
> .....
> .....
> .....
> 12345678
> .....
>
> whenever i search the file and reach 12345678, how do i get the line
> just above and below ( or more than 1 line above/below) the pattern
> 12345678 and save to variables? thanks

You could use the re module to search everything at once:

>>> import re
>>> print re.findall('\n([^\n]*)\n12345678\n([^\n]*)', open('input.dat').read())
[('ijklmnopq ', 'rstuvwxyz '), ('..... ', '.....')]


Raymond



From fredrik at pythonware.com  Tue Feb 28 15:39:54 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 28 Feb 2006 21:39:54 +0100
Subject: comple list slices
References: <mailman.2516.1141136527.27775.python-list@python.org><1141143200.110570.51680@u72g2000cwu.googlegroups.com><mailman.2519.1141145363.27775.python-list@python.org><1141146626.762530.282660@v46g2000cwv.googlegroups.com><mailman.2521.1141149956.27775.python-list@python.org>
	<1141158567.269567.295380@t39g2000cwt.googlegroups.com>
Message-ID: <du2ces$gvp$1@sea.gmane.org>

johnzenger at gmail.comwrote:

> Len(rows) recalculates each time the while loop begins.  Now that I
> think of it, "rows != []" is faster than "len(rows) > 0."

the difference is very small, and "len(rows)" is faster than "rows != []"
(the latter creates a new list for each test).

and as usual, using the correct Python spelling ("rows") is a lot faster
(about three times in 2.4, according to timeit).

</F>





From g.brandl-nospam at gmx.net  Wed Feb 15 11:03:06 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Wed, 15 Feb 2006 17:03:06 +0100
Subject: Python advocacy in scientific computation
In-Reply-To: <1139937227.379829.215090@z14g2000cwz.googlegroups.com>
References: <1139937227.379829.215090@z14g2000cwz.googlegroups.com>
Message-ID: <45h1lqF6hks7U2@individual.net>

Michael Tobis wrote:
> Someone asked me to write a brief essay regarding the value-add
> proposition for Python in the Fortran community. Slightly modified to
> remove a few climatology-related specifics, here it is.

Great text. Do you want to put it onto a Wiki page at wiki.python.org?

Georg


From jgardner at jonathangardner.net  Thu Feb 16 15:41:34 2006
From: jgardner at jonathangardner.net (Jonathan Gardner)
Date: 16 Feb 2006 12:41:34 -0800
Subject: define loop statement?
In-Reply-To: <lW4Jf.31559$3V4.8390@trnddc06>
References: <lW4Jf.31559$3V4.8390@trnddc06>
Message-ID: <1140122494.223665.251780@g47g2000cwa.googlegroups.com>

No, not in the way you think it is. What you can do instead is
something like this:

def do_something(i):
  ... do_something ...

def loop(n, func):
    for i in range(n): func(i)

loop(10, do_something)



From michael at elehack.net  Tue Feb 28 08:41:31 2006
From: michael at elehack.net (Michael Ekstrand)
Date: Tue, 28 Feb 2006 07:41:31 -0600
Subject: C++ OpenGL rendering, wxPython GUI?
In-Reply-To: <1141118055.471718.90980@z34g2000cwc.googlegroups.com>
References: <1141118055.471718.90980@z34g2000cwc.googlegroups.com>
Message-ID: <20060228074131.6d63a53b.michael@elehack.net>

On 28 Feb 2006 01:14:15 -0800
tobfon at gmail.com wrote:
> I'm creating a scientific visualization application with rather high
> demands on performance. I've created a nice rendering engine for it in
> C++/OpenGL and a python interface to the rendering engine. Now I'm
> looking to build a GUI in python with the rendering engine as an
> integrated window. I will most likely use wxPython for the GUI and I
> know it has support for adding an OpenGL canvas.

> Maybe including wxWidgets in the C++ program and just using the
> wxPython-created canvas ID there will somehow be possible? I'll look
> into that but any help or ideas are most welcome.

I banged my head on this for quite a while trying to integrate
OpenInventor and wxPython (and later PyGTKGLext). Basically, the OpenGL
callers don't need to know what the current canvas is. You tell the
canvas to activate itself, it tells OpenGL "hey, I'm the current canvas
now". Then OpenGL commands draw themselves on that canvas. It's really
much simpler than I initially thought. You just have to make sure that
there's a Python function somewhere in your begin-rendering sequence
that activates the canvas before OpenGL calls begin.

- Michael

-- 
mouse, n: a device for pointing at the xterm in which you want to type.
                -- Fortune


From ian at excess.org  Wed Feb  8 23:37:50 2006
From: ian at excess.org (Ian Ward)
Date: Wed, 08 Feb 2006 23:37:50 -0500
Subject: Replacing curses (Was: Re: Problem with curses and UTF-8)
In-Reply-To: <mailman.1637.1139447073.27775.python-list@python.org>
References: <mailman.1637.1139447073.27775.python-list@python.org>
Message-ID: <43EAC71E.1030602@excess.org>

Jean-Paul Calderone wrote:
>> I've looked at newt and snack, but all I really need is:
>> - a way to position the cursor at (0,0)
>> - a way to hide and show the cursor
>> - a way to detect when the terminal is resized
>> - a way to query the terminal size
> 
> You might be interested in Twisted Conch's insults package.  I haven't 
> followed this thread closely, so I'm not sure if it covers all your 
> requirements, but it can do all of the above.

Thanks for the pointer!  twisted.conch.insult definitely has some of 
what I need.  The code for handling window resizing isn't jumping out at 
me but I'll keep looking.

Ian Ward



From dberlin at gmail.com  Sat Feb 11 04:45:09 2006
From: dberlin at gmail.com (dberlin at gmail.com)
Date: 11 Feb 2006 01:45:09 -0800
Subject: Yet another GUI toolkit question...
In-Reply-To: <43ED6990.1020707@wordtech-software.com>
References: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
	<m2d5huwof8.fsf@unique.fqdn>
	<43ED6990.1020707@wordtech-software.com>
Message-ID: <1139651109.458106.239760@o13g2000cwo.googlegroups.com>

What's wrong with wxPython? (http://www.wxpython.org)
Didn't see it mentioned here.

----
David Berlin
http://farpy.holev.com - Python GUI Editor



From dieter.vanderelst at gmail.com  Tue Feb 14 13:50:43 2006
From: dieter.vanderelst at gmail.com (Dieter Vanderelst)
Date: Tue, 14 Feb 2006 19:50:43 +0100
Subject: using an existing DLL file without having access to the source code?
Message-ID: <43F22683.7020407@gmail.com>

Dear all,

Could anybody tell me whether there are ways to use an existing DLL file 
in Python without having access to the source code?

I'm trying to find a way to use the image filters available in the 
Filters-project (http://filters.sourceforge.net/) without having to 
compile or build the DLL myself, which is according to the authors very 
hard.

I have quite some experience with Python itself, but I'm not really 
familiar with extending/embedding Python, please bare that in mind when 
responding :).

With kind regards,
Dieter


From donn at u.washington.edu  Wed Feb  8 19:48:01 2006
From: donn at u.washington.edu (Donn Cave)
Date: Wed, 08 Feb 2006 16:48:01 -0800
Subject: Replacing curses
References: <mailman.1566.1139345769.27775.python-list@python.org>
	<43E9234B.6030108@v.loewis.de>
	<mailman.1588.1139372460.27775.python-list@python.org>
	<11ujl3ibdh7vne1@corp.supernews.com>
	<mailman.1602.1139418578.27775.python-list@python.org>
	<11ul2eskh5q2pab@corp.supernews.com>
Message-ID: <donn-33BDDA.16480108022006@gnus01.u.washington.edu>

In article <11ul2eskh5q2pab at corp.supernews.com>,
 Thomas Dickey <dickey at saltmine.radix.net> wrote:

> Ian Ward <ian at excess.org> wrote:
...
> > Also, screen resizing only seems to be reported once by getch() even if
> > the user continues to resize the window.  I have worked around this by
> > calling curses.doupdate() between calls to getch(). Maybe this is by 
> > design?
> 
> Or perhaps it's some interaction with python - I don't know.
> The applications that I use with resizing (and ncurses' test
> programs) work smoothly enough.

I have no idea about the present application, but just as a
general observation, when Python traps a signal, it saves
the signal number, and makes a note to check for trapped signals
as the next Python operation.  That check iterates through the
list of possible signals to see if any have been caught, and
execute their respective handlers if any.

Since an external function call is an operation, no signal
handler will execute until it returns.  At that time, the
signal handler will execute once, at most.

> > Finally, the curses escape sequence detection could be broadened. The
> > top part of the curses_display module in Urwid defines many escape
> > sequences I've run into that curses doesn't detect.
> 
> That's data (terminfo).  ncurses is data-driven, doesn't "detect"
> features of the terminal (though it does of course use environment
> variables for locale, etc.).
> 
> xterm's terminfo lists a lot of function keys, for instance.

This is just my opinion, but any application that depends
on function keys in terminfo is broken, automatically.
Optional support for function keys is a nice touch, but the
data isn't good enough out there to depend on it.

   Donn Cave, donn at u.washington.edu


From could.net at gmail.com  Tue Feb 14 21:11:13 2006
From: could.net at gmail.com (Frank Potter)
Date: Wed, 15 Feb 2006 10:11:13 +0800
Subject: How to *Search* with google from inside my programme and get the
	search result?
Message-ID: <311b5ce10602141811t48a47d1fv42186e2c490a4b38@mail.gmail.com>

I want to search something by a key word from inside my py script.
The using google idea comes to my mind first because write a search
programme from scratch is not so easy.

I want to take advantage of goolge results, but I don't know how.
To extract the result from html of google can get the result, but it's not
reliable and stable because the html structure my be changed any time.

Does google supply some webservice to programmers? I did see
some a tool use google to search and use it's result from the programme very
well. Its name is "Email catcher&sender 2.10", which can be download
at http://www.worldminer.com/download.htm. Windows users can take a
look at it. It supports more than google, but yahoo and some other search
engines. How does it do it? I really need some hints.


From erniedude at gmail.com  Mon Feb  6 11:32:18 2006
From: erniedude at gmail.com (Ernesto)
Date: 6 Feb 2006 08:32:18 -0800
Subject: Size of list
Message-ID: <1139243538.269506.214060@f14g2000cwb.googlegroups.com>

for line in PM_File_Handle.readlines():
	PM_fields = line.split(';')

# Is there a way to get the size of PM_Fields here ?
# Something like

size = PM_fields.size( )

#  I could not find this attribute in the python docs.  Thanks



From peter at engcorp.com  Mon Feb 20 17:02:24 2006
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 20 Feb 2006 17:02:24 -0500
Subject: getting started, .py file
In-Reply-To: <1140471172.783876.80400@g14g2000cwa.googlegroups.com>
References: <1140471172.783876.80400@g14g2000cwa.googlegroups.com>
Message-ID: <dtde9g$gjv$1@sea.gmane.org>

nibiery at hotmail.com wrote:
> I am just getting started with Python, and I think I may be thinking
> about it wrong. I'd like to be able to work interactively with some
> code that I've got in a file. The only interpreted language I have much
> experience with is Tcl/Tk, and in that I would use "source file.tcl" in
> the console to load my source. Is there a similar command in python? I
> know I can run my file as a script, but since I'm just experimenting
> with how the language works, I want to have more flexibility to be able
> to interactively check the contents of variables and define one piece
> at a time. Am I missing something obvious, or am I not thinking about
> Python properly?

Note that one useful thing you can do if you take Steve's first approach 
("import mycode") is to do "reload(mycode)" after you've made changes in 
a text editor and resaved your mycode.py file.  That will reload the 
module from the source, picking up whatever changes you've made.  Handy 
for some kinds of quick experimentation... (though often just typing 
stuff at the prompt and then integrating with your source after you've 
got it working is a more efficient approach).

-Peter



From shandy.b at gmail.com  Tue Feb 28 10:29:06 2006
From: shandy.b at gmail.com (shandy.b at gmail.com)
Date: 28 Feb 2006 07:29:06 -0800
Subject: comple list slices
References: <mailman.2516.1141136527.27775.python-list@python.org>
Message-ID: <1141140546.854493.183320@v46g2000cwv.googlegroups.com>

A couple questions:

1- what is j?
2- what does the rows[x][y] object look like?  I assume it's a dict
that has a "rowspan" key.  Can rows[x][y]["rowspan"] sometimes be 0?

Perhaps you're looking for something like this:
rowgroups = []
rowspan = 0
for i in range( len(rows) ):
    if rowspan <= 0:
        rowspan = rows[j][0]["rowspan"]
        if rowspan == 0:
            rowspan = 1

        rowgroups.append(rows[ i : i + rowspan ])

    rowspan -= 1

-sjbrown



From user at example.net  Sat Feb  4 14:02:44 2006
From: user at example.net (pyluke)
Date: Sat, 04 Feb 2006 19:02:44 GMT
Subject: re.search slashes
In-Reply-To: <ds2sj2$kqh$1@aphrodite.grec.isp.9tel.net>
References: <Yj4Ff.746690$x96.167598@attbi_s72> <43e4f066$1@nntp0.pdx.net>
	<ds2sj2$kqh$1@aphrodite.grec.isp.9tel.net>
Message-ID: <oT6Ff.746898$x96.341997@attbi_s72>


> To add to what scott said, two advices:
> 1. Use Kodos, it's a RE debugger and an extremely fine tool to generate 
> your regular expressions.

Ok, just found this.  Will be helpful.

> 2. Read the module's documentation. Several time. In your case read the 
> "negative lookbehind assertion" part "(?<! ... )" several time, until 
> you understand how it may be of use to you.

Quite a teacher.  I'll read it several times...

Thanks anyway.


From steve at REMOVETHIScyber.com.au  Tue Feb 14 07:18:09 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Tue, 14 Feb 2006 23:18:09 +1100
Subject: Unexpected behaviour of getattr(obj, __dict__)
References: <pan.2006.02.14.11.36.28.723688@REMOVETHIScyber.com.au>
	<43f1c722$0$17400$626a54ce@news.free.fr>
Message-ID: <pan.2006.02.14.12.18.07.897108@REMOVETHIScyber.com.au>

On Tue, 14 Feb 2006 13:03:17 +0100, bruno at modulix wrote:

> Steven D'Aprano wrote:
>> I came across this unexpected behaviour of getattr for new style classes.
>> Example:
>> 
>> 
>>>>>class Parrot(object):
>> 
>> ...     thing = [1,2,3]
>> ...
>> 
>>>>>getattr(Parrot, "thing") is Parrot.thing
>> 
>> True
>> 
>>>>>getattr(Parrot, "__dict__") is Parrot.__dict__
>> 
>> False
> 
> 
> hint:
>>>> getattr(object, '__dict__')
> <dictproxy object at 0x2aaaaab2ff30>

That doesn't answer the question, it just re-words it. Why is the
dictproxy returned by getattr a different instance from the dictproxy that
you get when you say object.__dict__?



-- 
Steven.



From a.schmolck at gmail.com  Mon Feb 20 18:13:09 2006
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: 20 Feb 2006 23:13:09 +0000
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<yfspsljp321.fsf@oc.ex.ac.uk>
	<1140441519.702761.326130@g14g2000cwa.googlegroups.com>
	<pan.2006.02.20.21.05.17.947577@REMOVETHIScyber.com.au>
	<1140471528.655265.312730@f14g2000cwb.googlegroups.com>
Message-ID: <yfsslqdmxoa.fsf@oc.ex.ac.uk>

"Kay Schluehr" <kay.schluehr at gmx.net> writes:

> Alexanders hypothesis is completely absurd. 

You're currently not in the best position to make this claim, since you
evidently misunderstood what I wrote (I certainly did not mean to suggest that
Guido *deliberately* chose to make python slow; quite the opposite in fact).

Maybe I wasn't sufficiently clear, so if rereading my original post doesn't
bring about enlightenment, I'll try a restatement.

> It turned out over the years that capabilities of Python optimization are
> lower than those of Lisp and Smalltalk. But its a system effect and
> epiphenomenon of certain design decisions. 

The point is that the design decisions, certainly for Common Lisp, scheme and
particularly for dylan where also informed by what could be done
*efficiently*, because the people who designed these languages knew a lot
about advanced compiler implementation strategies for dynamic languages and
thought that they could achieve high levels of expressiveness whilst retaining
the possibility of very fast implementations (IIRC dylan specifically was
meant to be something like within 90% of C performance). CL and dylan were
also specifically designed for building very large and sophisticated systems,
whereas it seems Guido originally thought that python would scale to about 500
LOC.

> This might change with PyPy - who knows? The Lisp/Smalltalk design is
> ingenious, radical and original and both languages were considered too slow
> for many real-world-applications over decades. But no one has ever claimed
> that Alan Kay intentionally created a slow language in order to hold the
> herd together - and it accidentally turned out to be reasonably fast with
> JIT technology in the late 90s.

I'm pretty sure this is wrong. Smalltalk and Lisp were both quite fast and
capable before JIT technology in the 90ies came along -- just not necessarily
on hardware optimized for C-like languages, partly because no one anticipated
that the x86 and co. would become so dominant (I also roughly remember Alan
Kay expressing his frustration not to long ago over the fact that despite a
50000 fold increase in processing speed, current hardware would only run early
smalltalk 100x faster than the lisa -- I almost certainly misremember the
details but you get the picture).

> A conspiracy like theory used to explain what's going on is needless.

Indeed.

'as


From aleaxit at yahoo.com  Sun Feb 12 18:34:11 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 12 Feb 2006 15:34:11 -0800
Subject: Need a bit of help with a list..
References: <1139784338.534772.311320@f14g2000cwb.googlegroups.com>
Message-ID: <1hanjnx.1iqgh0l1akgwxzN%aleaxit@yahoo.com>

rh0dium <steven.klass at gmail.com> wrote:
   ...
> Why doesn't this work as expected..  I expect that the the lines within
> the sections will get modified - permanently.  It is modifying them
> during the first section but they never get saved to the new values..
> Can anyone help me and even better explain why it's not working..
> 
>         for section in self.sections:
>             nidx = 0
>             for line in self.sections[section]:

>From this constuct I assume self.sections is a dict, in which case there
may be better way to loop over the values in the dict; but that's an
aside and does not affect your stated problem.  Rather, said problem is
already shown in the next couple lines:

>                 if re.match(r"^.*\+$",line):
>                     line = line[:-1]

A simple assignment _to a bare name_ (here, 'line') only ever affects
that NAME itself - nothing else, and in particular not the object to
which the name used to be bound before you re-bound it, not other names
(or locations within a container) bound to the same object, and so on.

To affect some item, say the i-th one, of self.sections[section], you
will need to assign something to self.sections[section][i].  You may
give another and nicer name to the whole objects self.sections[section],
but you will still need to assign to whatevername[i] to rebind the i-th
item -- assign to an indexing, not to a bare name.

There's another problem later in this inner loop:

>                     del self.sections[section][nidx+1]

...don't alter the container you're directly looping on, for example by
deleting some of its items: that will alter the semantics of the loop in
way you most definitely don't want. I don't think it's biting you here,
but in most cases it will indeed bite, and painfully.

I would suggest restructuring your whole first nested loop, correcting
other strangeness (which is innocuous) as we go, such as the strange re
and the separate and identical increments of nidx along an if and an
else branch.  For example, trying to stay as close as feasible to your
original code, we might have:

        for lines in self.sections.itervalues():
            nidx = 0
            while nidx<len(lines):
                line = lines[nidx]
                if line.endswith('+'):
                    lines[nidx] = line[:-1] + " " + lines[nidx+1]
                    del lines[nidx+1]
                nidx += 1

This still has several problems (crashes if there's a + at the end of
the last line, doesn't join properly if two successive lines both end
with +, possibly others since my code is NOT tested) but they're not
horribly hard to fix if they're indeed problems for you.


Alex


From c_shyone at yahoo.com  Wed Feb 22 08:58:09 2006
From: c_shyone at yahoo.com (Farel)
Date: 22 Feb 2006 05:58:09 -0800
Subject: Which is faster? (if not b in m) or (if m.count(b) > 0)
In-Reply-To: <mailman.2067.1140205271.27775.python-list@python.org>
References: <mailman.1988.1140064009.27775.python-list@python.org>
	<1140192708.160844.138890@g14g2000cwa.googlegroups.com>
	<mailman.2067.1140205271.27775.python-list@python.org>
Message-ID: <1140616689.075536.272480@z14g2000cwz.googlegroups.com>

Thank you, Peter!  Please understand, I was attempting to get more info
on the WHY x is faster than y...  from those with more experience.
Timer cannot give me that info.



From fredrik at pythonware.com  Sun Feb 19 07:07:06 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 19 Feb 2006 13:07:06 +0100
Subject: ANN: FreeImagePy 1.2.2
References: <43f43ec3$0$29107$5fc30a8@news.tiscali.it>	<dt223q$s9n$1@newsreader3.netcologne.de><mailman.2006.1140100462.27775.python-list@python.org>
	<dt9lbk$kl2$1@online.de>
Message-ID: <dt9n1c$nlp$1@sea.gmane.org>

Uwe Grauer wrote:

> Did you read the PIL licence?
> Seems to be a more free licence than GPL.

footnote: PIL's using the old Python license, which is also known as
the "Historical Permission Notice and Disclaimer":

    http://www.opensource.org/licenses/historical.php

</F>





From kent at kentsjohnson.com  Mon Feb  6 06:06:36 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Mon, 06 Feb 2006 06:06:36 -0500
Subject: rexec in jython??
In-Reply-To: <1139150251.962289.52370@o13g2000cwo.googlegroups.com>
References: <1139138133.072742.282710@z14g2000cwz.googlegroups.com>
	<1139140115.016898.72360@z14g2000cwz.googlegroups.com>
	<1139142998.236991.130470@g47g2000cwa.googlegroups.com>
	<44mb0pF2rqu1U1@uni-berlin.de>
	<1139146174.981081.108700@o13g2000cwo.googlegroups.com>
	<44md0kF2nkeqU1@uni-berlin.de>
	<1139150251.962289.52370@o13g2000cwo.googlegroups.com>
Message-ID: <43e7298b$1_1@newspeer2.tds.net>

Mark Fink wrote:
> one minor issue is still left:
> correct me if I am wrong: result of 2/-3 is 0 (at least this is how it
> is defined in the testcase)
> In Jython 2.1.3:
> 
>>>>2/-3
> 
> -1

CPython gives the same result and the language reference says, "Plain or 
long integer division yields an integer of the same type; the result is 
that of mathematical division with the `floor' function applied to the 
result." so this seems to be intentional.

Kent


From nszabolcs at gmail.com  Thu Feb 16 09:32:27 2006
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 16 Feb 2006 06:32:27 -0800
Subject: ANN: FreeImagePy 1.2.2
In-Reply-To: <dt223q$s9n$1@newsreader3.netcologne.de>
References: <43f43ec3$0$29107$5fc30a8@news.tiscali.it>
	<dt223q$s9n$1@newsreader3.netcologne.de>
Message-ID: <1140100347.374383.31750@z14g2000cwz.googlegroups.com>

eg.: .dds (compressed texture file format) widely used in 3d games but
not accessible in pil



From blair.houghton at gmail.com  Tue Feb  7 01:02:29 2006
From: blair.houghton at gmail.com (Blair P. Houghton)
Date: 6 Feb 2006 22:02:29 -0800
Subject: numeric expression from string?
In-Reply-To: <pan.2006.02.04.14.51.46.770998@REMOVETHIScyber.com.au>
References: <mailman.1413.1139061291.27775.python-list@python.org>
	<pan.2006.02.04.14.51.46.770998@REMOVETHIScyber.com.au>
Message-ID: <1139289350.715129.227990@g14g2000cwa.googlegroups.com>

Steven wrote:
>Do you think your users might enter something Evil and break their own system?

That's not usually how it works.

How it usually works is:

1.  Innocent code-monkey writes nifty applet, posts on usenet.
2.  Innocent but dull-witted framework manufacturer includes nifty
applet in Next Big Thing framework.
2.  Innocent webmaster uses framework to design entire website,
dragging and dropping input boxes validated by nifty applet all over
the place.
3.  Budding malevolent self-deceived "just fooling around" script
kiddie enters evil string into vulnerable buffer passed nifty applet,
taking down innocent webmaster's system.  Posts astonishment on
#dickwar3z irc channel.
4.  Genuinely malevolent wiseguy/blackmailer/terrorist blackhat stores
sploit for later inclusion in rootkit-laying worm suite.
5.  Randal Schwartz goes to jail.

--Blair



From fredrik at pythonware.com  Wed Feb 15 11:29:23 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 15 Feb 2006 17:29:23 +0100
Subject: low level data types
References: <1140005257.773955.32860@g14g2000cwa.googlegroups.com><mailman.1951.1140015161.27775.python-list@python.org>
	<1140020594.762674.162840@g47g2000cwa.googlegroups.com>
Message-ID: <dsvkt5$arr$1@sea.gmane.org>

"dementrio" wrote:

> However now I have another problem - endianness (the client runs on
> powerpc, the server on x86). I found that simply reversing the stuff I
> recv() works, but is there any cleaner way for taking care of this?

http://docs.python.org/lib/module-struct.html

(see the second table, the one that has "byte order" and "size and
alignment" in the heading)

</F>





From grante at visi.com  Mon Feb 13 11:49:06 2006
From: grante at visi.com (Grant Edwards)
Date: Mon, 13 Feb 2006 16:49:06 -0000
Subject: emacs keybindings for scite/scinitilla?
Message-ID: <11v1e42r13h4dce@corp.supernews.com>

This is technically off-topic, but scite/scinitilla seems to
have a particular connection to the Python community.

I just tried scite for the first time and rather like it.  It
uses GTK, which is shared with my desktop (XFCE) so it starts
up fast.  It's fairly lean (at least by Emacs/Gnome/KDE
standards), but I don't think I can un-learn emacs keybindings.

Are emacs keybindings availble for scite somehow?

-- 
Grant Edwards                   grante             Yow!  .. Like I always
                                  at               say -- nothing can beat
                               visi.com            the BRATWURST here in
                                                   DUSSELDORF!!


From a.schmolck at gmail.com  Mon Feb 20 17:16:38 2006
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: 20 Feb 2006 22:16:38 +0000
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<mailman.2131.1140377578.27775.python-list@python.org>
	<yfsbqx3ov29.fsf@oc.ex.ac.uk> <eq7pc3-ml5.ln1@lairds.us>
	<7cjpc3-2a.ln1@lairds.us> <87irr967e7.fsf@wilson.homeunix.com>
Message-ID: <yfsy805n0ah.fsf@oc.ex.ac.uk>

Torsten Bronger <bronger at physik.rwth-aachen.de> writes:

> I was rather stunned, too, when I read his line of thought.
> Nevertheless, I think it's not pointless, albeit formulated in an
> awkward way.  Of course, Python has not been deliberately slowed
> down.

Indeed -- and I'm really not sure what defect in someone's reading skills or
my writing skills would make anyone think I suggested this.

'as


From fakeaddress at nowhere.org  Thu Feb  9 16:48:43 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Thu, 09 Feb 2006 21:48:43 GMT
Subject: Threads and Interpreter death
In-Reply-To: <cm9nu1lgnardjgg1gba3as5gabd9fmtcfe@4ax.com>
References: <mailman.1674.1139506633.27775.python-list@python.org>
	<cm9nu1lgnardjgg1gba3as5gabd9fmtcfe@4ax.com>
Message-ID: <%MOGf.10562$2O6.1088@newssvr12.news.prodigy.com>

Rene Pijlman wrote:
> Carl J. Van Arsdall:
> 
>>I've been toying with threads a lot lately and I've noticed that if a 
>>scripting error occurs in a thread the thread dies, but not the process 
>>that spawned the thread.
>>
>>Is python supposed to behave this way or is this type of behavior 
>>accidental?
> 
> 
> "start_new_thread(function, args[, kwargs])
> When the function terminates with an unhandled exception, a stack trace is
> printed and then the thread exits (but other threads continue to run)."
> http://docs.python.org/lib/module-thread.html

And you might also want to see threading.thread's setDaemon() method:

     The entire Python program exits when no active non-daemon
     threads are left.

     http://docs.python.org/lib/thread-objects.html


-- 
--Bryan


From no at spam.com  Mon Feb 13 20:25:56 2006
From: no at spam.com (DH)
Date: Mon, 13 Feb 2006 19:25:56 -0600
Subject: Jedit
In-Reply-To: <ziggy-358301.20045813022006@netnews.asp.att.net>
References: <ziggy-358301.20045813022006@netnews.asp.att.net>
Message-ID: <a9KdnTDXHOE6rGzenZ2dnUVZ_vidnZ2d@comcast.com>

ziggy wrote:
> Just wondering if there is something out there like Jedit, but written 
> in python ( not just supporting, but actually written in it.. )
> 
> Nothing large like Stanzi's or Boa.. Just something quick and simple, 
> with code completion, and a debugger..

No.  The only editors with features like JEdit are vim and emacs.


From adelagon at gmail.com  Mon Feb 20 10:25:28 2006
From: adelagon at gmail.com (Alvin A. Delagon)
Date: Mon, 20 Feb 2006 15:25:28 +0000
Subject: Is inifinite loop not a good practice?
Message-ID: <43F9DF68.5020301@gmail.com>

Greetings,

I have to write a python script that would continously monitor and 
process a queue database. Once the script sees an unprocessed record it 
will create a thread to process it otherwise it will do nothing. I've 
been planning to do an infinite loop within the script to do this but 
I've been hearing comments that infinite loop is a bad programming 
practice. I'm opted to run the script via crontab but I consider it as 
my last resort. Do you have any suggestions on the design? Thanks in 
advance!


From dickey at saltmine.radix.net  Thu Feb  9 06:43:02 2006
From: dickey at saltmine.radix.net (Thomas Dickey)
Date: Thu, 09 Feb 2006 11:43:02 -0000
Subject: Replacing curses
References: <mailman.1566.1139345769.27775.python-list@python.org>
	<43E9234B.6030108@v.loewis.de>
	<mailman.1588.1139372460.27775.python-list@python.org>
	<11uk55h47lruk18@corp.supernews.com>
	<mailman.1611.1139422272.27775.python-list@python.org>
	<11ukf0ci8d6ac64@corp.supernews.com>
	<mailman.1620.1139429435.27775.python-list@python.org>
	<11ul1mgplrah63e@corp.supernews.com>
	<1139451439.115775.223250@g43g2000cwa.googlegroups.com>
	<mailman.1642.1139461214.27775.python-list@python.org>
Message-ID: <11umam6fk7isu9b@corp.supernews.com>

Ian Ward <ian at excess.org> wrote:

> I'm going to look at the Mined text editor for some terminal behavior

mined_2000 (there's more than one program named mined, and the other
doesn't do UTF-8).

> detection code.  Mined is able to produce good UTF-8 output on a variety
> of terminals, and it links agains ncurses, not ncursesw...  Interesting.

It's probably using termcap (and the wide-character functions declared
in wchar.h).

-- 
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net


From paul at boddie.org.uk  Fri Feb 24 15:14:24 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 24 Feb 2006 12:14:24 -0800
Subject: a little more help with python server-side scripting
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<dSoLf.1663$No6.38996@news.tufts.edu> <dtmhot$4t4$1@wake.carmen.se>
	<nTELf.1667$No6.38886@news.tufts.edu>
	<43ff1d75$1_1@newspeer2.tds.net>
	<xNFLf.1672$No6.39067@news.tufts.edu> <dtnbjp$va6$1@wake.carmen.se>
	<clILf.1673$No6.38927@news.tufts.edu>
Message-ID: <1140812064.391888.104730@v46g2000cwv.googlegroups.com>

John Salerno wrote:
>
> Well, I appreciate the help. I'm trying to figure it out, but it seems
> like with each new post, there is some new technology being mentioned or
> new method to do what I'm trying to do.

Let's just consolidate what we've learned here. Your provider says that
you can serve up two different things; the first one being...

 bits of Python code that are embedded within an HTML file

... (this being from a message you quoted), although they don't really
make themselves totally clear, because they then say...

 that after mapping .html will no
 longer be call as normal html file to be loaded on the browser as the
 IIS server now will parse .html with the Python executable engine.
 Your user will need to embed the Python coding into each of the .html
 file in order for it to be load properly on the browser.

...which sounds like ASP to me, noting that the "Python executable
engine" is probably the Active Scripting engine which can work with
Python. So let's call that the "ASP with Python" route.

Now, the other thing they said you could serve up are Python scripts:

 Save your python script as .py file on the wwwroot and
 you may call the scripts using http://www.yourdomain.com/yourfile.py

What these scripts have to do when they run is to output some text
which consists of some headers and the text of a Web page that will
appear in your browser (and you can test them yourself before you
upload them by seeing if they output the expected stuff when you run
them). Let's call this the "CGI with Python" route.

> I guess I'm not well-versed
> enough in Python to even attempt this kind of thing yet. I didn't
> realize it would be this complicated. I guess I hoped it would be as
> easy as including some PHP code and letting the server detect the .php
> extension and handle it all. I'm going to try to solidify the basics
> first, then move on to web programming a little later.

Well, guessing at your configuration from what the support people have
said, it may be simpler to just test things with the "CGI with Python"
option first. So, if you take a CGI program such as one from this
page...

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52220

...like this one...

#!/usr/bin/python
import cgi
cgi.test()

...save it as yourfile.py, upload it as instructed above, and then
visit your site (also as instructed above), you should see some test
output from Python. (Again, you can check the output by running
yourfile.py locally and seeing that it prints out some HTML to the
screen.)

If you want to do the PHP-style thing - the "ASP with Python" option -
then you probably need to make a Web page, similar to that described
here...

http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B276494

...save it as yourfile.html (given what they said in their response to
you, although most people thought it should be yourfile.asp - why not
try both?!), upload it, and then visit your site (as instructed above,
but remembering that you're looking for a file called yourfile.html or
yourfile.asp instead of yourfile.py).

If the yourfile.html thing doesn't work but the yourfile.asp does, then
forget about what they said about HTML files and .html and remapping
things: just call your "ASP with Python" files names with .asp on the
end.

To sum up:

 1. Copy the three line "CGI with Python" example, save it as
    yourfile.py, upload it, test it. If it works, celebrate and move
    on to step 2. If it doesn't, move on to step 2 anyway. ;-)

 2. Copy the Web page example from the Microsoft link, save it
    as yourfile.asp and also as yourfile.html, upload them, test
    them. If one of them works, celebrate and note down whether
    you should be using .asp or .html on the end of your filenames.
    If both of them work, celebrate more vigorously! If neither work,
    try and tell us what went wrong.

Good luck!

Paul



From john_sips_teaz at yahooz.com  Thu Feb 23 02:06:49 2006
From: john_sips_teaz at yahooz.com (John M. Gabriele)
Date: Thu, 23 Feb 2006 02:06:49 -0500
Subject: new wooden door step - fixing and finishing
In-Reply-To: <V17Lf.17308$915.16029@southeast.rr.com>
References: <1140598234.454510.281820@g14g2000cwa.googlegroups.com>
	<V17Lf.17308$915.16029@southeast.rr.com>
Message-ID: <DddLf.427$qX4.18@fe10.lga>

Jeffrey Schwab wrote:
> jkn wrote:
> 
> 
>> I was wondering about treating it
>> wilth liberal amounts of Teak Oil or similar...
> 
> 
> Some people, when confronted with a problem, think "I know, I?ll use 
> Teak Oil."  Now they have two problems.


Quit it! You're making me laugh too much and it's gonna
wake up the kids! :D

-- 
(remove zeez if demunging email address)


From jzgoda at o2.usun.pl  Mon Feb 27 07:53:27 2006
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Mon, 27 Feb 2006 13:53:27 +0100
Subject: making 'utf-8' default codec
In-Reply-To: <MPG.1e6d0bea15971bcb989832@news.htnet.hr>
References: <MPG.1e6d0bea15971bcb989832@news.htnet.hr>
Message-ID: <dtusr3$o1s$1@nemesis.news.tpi.pl>

Nikola Skoric napisa?(a):

> Is there a way of making 'utf-8' default codec for the whole program, so 
> I don't have to do .encode('utf-8') every time I print out a string?

Bad idea. You may accidentally break some libraries that depend on ASCII
being default & standard.

-- 
Jarek Zgoda
http://jpa.berlios.de/


From python.list at tim.thechases.com  Mon Feb 27 03:32:26 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Mon, 27 Feb 2006 02:32:26 -0600
Subject: PEP 354: Enumerations in Python
In-Reply-To: <87accdplbj.fsf@rose.polar.local>
References: <87accdplbj.fsf@rose.polar.local>
Message-ID: <4402B91A.4010108@tim.thechases.com>

Just a couple thoughts:

> An enumeration is an exclusive set of symbolic names bound
> to arbitrary unique values.  

Uniqueness imposes an odd constraint that you can't have 
synonyms in the set:

 >>> shades = enum({white:100, grey:50, gray:50, black:0})

Not a bad thing, as it would then have interesting results 
upon iterating (would the above example have three or four 
passes through the iteration loop?), but there could be some 
handy uses for enums containing duplicates.

 >     >>> Grades = enum('A', 'B', 'C', 'D', 'F')

This produces the counter-intuitive result of

	>>> Grades.A > Grades.B
	False

Sure, one can bung with it and create the set of grades 
backwards, but then iteration becomes weird.  Perhaps the 
ability to override the comparitor?

-tkc






From martin.witte at gmail.com  Wed Feb  8 15:29:05 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 8 Feb 2006 12:29:05 -0800
Subject: Number Format function
References: <mailman.1603.1139418641.27775.python-list@python.org>
Message-ID: <1139430545.465074.322060@z14g2000cwz.googlegroups.com>

Your code has a little bug, I highly recommend to add a test to your
code, for an idea see below - I fixed your code as well.

#!/usr/bin/env python
import math

def number_format(num, places=0):
    """Format a number with grouped thousands and given decimal
places"""
    #is_negative = (num < 0)
    #if is_negative:
    #    num = -num

    places = max(0,places)
    tmp = "%.*f" % (places, num)
    point = tmp.find(".")
    integer = (point == -1) and tmp or tmp[:point]
    decimal = (point != -1) and tmp[point:] or ""

    count = commas = 0
    formatted = []
    for i in range(len(integer) - 1, 0, -1):
        count += 1
        formatted.append(integer[i])
        if count % 3 == 0:
            formatted.append(",")
    formatted.append(integer[0]) # this misses in your part
    integer = "".join(formatted[::-1])
    return integer+decimal


#
# add something like this: it helps to prevent you break your code
#
import unittest

class test_number_format(unittest.TestCase):
    def test(self):
        self.assertEqual(number_format(1000000, 2), '1,000,000.00')
        self.assertEqual(number_format(100000, 2), '100,000.00')
        self.assertEqual(number_format(100, 2), '100.00')
        self.assertEqual(number_format(1000000.33, 2), '1,000,000.33')
        self.assertEqual(number_format(1000000.333, 2), '1,000,000.33')
        self.assertEqual(number_format(1000000.3, 2), '1,000,000.30')
        self.assertEqual(number_format(123456, 2), '123,456.00')
        self.assertEqual(number_format(12345, 2), '12,345.00')
        self.assertEqual(number_format(123, 2), '123.00')
        self.assertEqual(number_format(123456.33, 2), '123,456.33')
        self.assertEqual(number_format(12345.333, 2), '12,345.33')
        self.assertEqual(number_format(123.3, 2), '123.30')

suite = unittest.makeSuite(test_number_format)
unittest.TextTestRunner(verbosity=2).run(suite)



From rajasekaran.natarajan at gmail.com  Wed Feb  1 23:02:59 2006
From: rajasekaran.natarajan at gmail.com (rajasekaran.natarajan at gmail.com)
Date: 1 Feb 2006 20:02:59 -0800
Subject: nDimensional sparse histogram in python.
In-Reply-To: <1138852458.567178.116980@g43g2000cwa.googlegroups.com>
References: <1138848672.791908.90050@g44g2000cwa.googlegroups.com>
	<1ha3gff.u4comocxo4ddN%aleaxit@yahoo.com>
	<1138849589.663600.301610@z14g2000cwz.googlegroups.com>
	<1ha3hrb.z9fahb1cxs03zN%aleaxit@yahoo.com>
	<1138852458.567178.116980@g43g2000cwa.googlegroups.com>
Message-ID: <1138852979.060845.249440@g44g2000cwa.googlegroups.com>

Hi
you can use has_key() to check whether
the particular value is in the key set or not.

>>> a = {}
>>> a[1] = 22
>>> a[2] = 33
>>> a
{1: 22, 2: 33}
>>> a.has_key(3)
False
>>> a.has_key(1)
True
>>>


-raj
KraftDiner wrote:
> Ok so this is nice.. Just one thing.. When you try to get a value from
> a dictionary
> and it isn't found in the dictionary things go bad...
>
> Take this for example:
>
> class histogram(object):
> 	def __init__(self):
> 		self.histo = {}
>
> 	def update(self, point):
> 		if self.histo.get(point) != None:
> 			self.histo[point] = self.histo[point] + 1
> 		else:
> 			self.histo[point] = 1
>
> 	def get(self, point):
> 		return self.histo[point]
>
>
> hist = histogram()
> hist.update((0,0,0))
> hist.update((0,0,1))
> hist.update((0,0,1))
> hist.get((0,0,0))
> hist.get((0,0,1))
> hist.get((0,0,2))
>
> spews out this error:
>
> Traceback (most recent call last):
>   File "histogram.py", line 21, in ?
>     hist.get((0,0,2))
>   File "histogram.py", line 12, in get
>     return self.histo[point]
> KeyError: (0, 0, 2)



From zzhikang at hotmail.com  Wed Feb 22 01:45:41 2006
From: zzhikang at hotmail.com (kanchy kang)
Date: Wed, 22 Feb 2006 06:45:41 +0000
Subject: May i customize basic operator (such as 1==3)?
In-Reply-To: <l7onv1t5rpivgrutuhqpahu56ah113b7su@4ax.com>
Message-ID: <BAY108-F3118D451BF0B7B1F69EAF1CDFD0@phx.gbl>

__eq__ method can resolve this problem only for class object.
what can i do in the following case?

a = somefuction(...) #a is stringType

a == "1234"?

my simple requirement is:
in some validation statments, such as, failUnless(a == "1234")
if the result is true, it's OK. otherwise, it prints a automatically.

also, i know we can implement failUnless(...) to satisfy this,
failUnless(a == b, a, b)

but i think, if we can override "==" for any type, it will make things 
conveniently...

regards!


>From: Casey Hawthorne <caseyhHAMMER_TIME at istar.ca>
>To: python-list at python.org
>Subject: Re: May i customize basic operator (such as 1==3)?
>Date: Wed, 22 Feb 2006 04:06:34 GMT
>
>I believe you are asking for a side effect from the "==" operator.
>
>Add print statements to the __eq__ method.
>
>"kanchy kang" <zzhikang at hotmail.com> wrote:
>
> >Hi,all
> >as we know, we can override the operator of one object(for example 
>__eq__).
> >my question is, how to override the basic operator?
> >for example,
> >
> >for any object comparison operator(including litterals),
> >for example,
> >a = "123"
> >b = "321"
> >
> >the boolean equation a == b,
> >i need override "==" operator like this:
> >first display a and b
> >
> >then return real boolean result (a == b).
> >
> >thanks!
> >
> >
> >-----------------------------------------------
> >Best regards,
> >kangzz
> >
> >mailto:zzhikang at hotmail.com
> >Tel : 021-65407754
> >MP: 13916928084
> >
> >_________________________________________________________________
> >Express yourself instantly with MSN Messenger! Download today - it's 
>FREE!
> >http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/
>--
>Regards,
>Casey
>--
>http://mail.python.org/mailman/listinfo/python-list

_________________________________________________________________
Express yourself instantly with MSN Messenger! Download today - it's FREE! 
http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/



From twic at urchin.earth.li  Tue Feb  7 15:35:08 2006
From: twic at urchin.earth.li (Tom Anderson)
Date: Tue, 7 Feb 2006 20:35:08 +0000
Subject: Dual Core outlook
In-Reply-To: <1139335428.970958.170320@o13g2000cwo.googlegroups.com>
References: <1139329268.695421.191340@g47g2000cwa.googlegroups.com>  
	<dsajpk$c26$1@aphrodite.grec.isp.9tel.net>
	<1139335428.970958.170320@o13g2000cwo.googlegroups.com>
Message-ID: <Pine.LNX.4.62.0602071944020.4501@urchin.earth.li>

On Tue, 7 Feb 2006, malv wrote:

> Maybe this is too simplistic, but given two programs, one in Python the 
> other in Java or C#. Would this mean that running the latter on a dual 
> core processor would significantly increase execution speed, whereas the 
> Python program would be running in one processor only without any speed 
> up?
>
> Is a Java program capable of this "out of the box" or does this require 
> specific additional code?

If i understand the question correctly, the latter - you need to take 
explicit action to make use of two processors in Java, or any other 
mainstream language.

What i think you're asking is whether code like this:

public class MyApp
{

 	public static void main(String[] args)
 	{
 		// do a bunch of stuff
 	}

}

will run faster with two cores. The answer to that is definitely no (more 
or less - see below!); this program has one thread of execution, and each 
thread can only use one core at a time, so this program will only use one 
core. In order to use multiple cores, you need multiple threads:

public class MyApp implements Runnable
{

 	public static final int NUM_THREADS = 4 ; // or whatever

 	public static void main(String[] args)
 	{
 		for (int i = 0 ; i < NUM_THREADS ; ++i)
 			new Thread(new MyApp()).start() ;
 	}

 	public void run()
 	{
 		// do a bunch of stuff
 	}

}

This program will get a roughly proportional speedup from multiple cores, 
provided the actual work can be done without the threads threading on each 
others' toes. If you try the equivalent in python (using the threading 
module), you, AIUI, won't get a significant speedup, as python is 
essentially single-threaded (is that really true?).

Now, as i promised above, the thing about single-threaded programs not 
getting a speedup from multiple cores is not quite right. The thing is, a 
program in which a single thread is executing your code is not actually 
single-threaded - there are other threads running in the background, doing 
mysterious system stuff; with the Sun 1.5.0 JVM on Windows XP, a minimal 
program has eight threads running. One of the things those threads are 
doing - or will be once JVMs start to adapt to the multi-core world - is 
garbage collection; GC can eat a measurable, although not huge, fraction 
of your execution time, so farming it out to a second core should speed 
your program up a bit.

tom

PS Excuse any errors in the java - it's a long time since i've written 
any!

-- 
Through the darkness of Future Past the magician longs to see.


From sjdevnull at yahoo.com  Thu Feb  9 13:22:59 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 9 Feb 2006 10:22:59 -0800
Subject: Test indexers...how do they work?
In-Reply-To: <1139494767.338556.110030@g44g2000cwa.googlegroups.com>
References: <1139494767.338556.110030@g44g2000cwa.googlegroups.com>
Message-ID: <1139509379.443973.111380@g14g2000cwa.googlegroups.com>

Raja Raman Sundararajan wrote:
> I wanted to know how the algorithm of indexers look like. I have heard
> people talking about B-Trees. But this info. is simply know enough. I
> would like to know exactly each part of the indexing flow and the
> algorightm behind it work.

Get the book "Managing Gigabytes: Compressing and Indexing Documents
and Images".



From paullanier at gmail.com  Tue Feb 28 20:16:53 2006
From: paullanier at gmail.com (paullanier at gmail.com)
Date: 28 Feb 2006 17:16:53 -0800
Subject: Use empty string for self
In-Reply-To: <mailman.2544.1141171534.27775.python-list@python.org>
References: <1141170846.619246.163470@t39g2000cwt.googlegroups.com>
	<mailman.2544.1141171534.27775.python-list@python.org>
Message-ID: <1141175813.170306.6400@v46g2000cwv.googlegroups.com>

Thanks.  I thought for sure it must have been discussed before but for
whatever reason, my googling skills couldn't locate it.



From mark at holmes.nl  Fri Feb 17 04:21:11 2006
From: mark at holmes.nl (wscrsurfdude)
Date: 17 Feb 2006 01:21:11 -0800
Subject: file.read problem
In-Reply-To: <mailman.2041.1140166701.27775.python-list@python.org>
References: <1140158220.388409.87650@g47g2000cwa.googlegroups.com>
	<1140159632.758960.318580@g44g2000cwa.googlegroups.com>
	<mailman.2041.1140166701.27775.python-list@python.org>
Message-ID: <1140168071.085338.132630@o13g2000cwo.googlegroups.com>

>if it's a binary file, open with mode "rb".
You are right about opening it in the rb mode (flaw in the start post),
but also when I do this in windows in front of every 0x0A is put a
0x0D. I found a explanation why it is working in linux it is below in
my post.

But what i get of this that in windows in front of every 0x0A is put a
0x0D as a line feed. II have to get rid of these. But if there is
already binary data in my original file with the data 0x0D0A the 0x0D
also is deleted, someone has an idea??

############################################
The whole subject of newlines and text files is a murky area of non
standard implementation by different operating systems. These
differences have their roots in the early days of data communications
and the control of mechanical teleprinters. Basically there are 3
different ways to indicate a new line:

 Carriage Return (CR) character ('\r')
 Line Feed (LF) character ('\n')
 CR/LF pair ('\r\n').
All three techniques are used in different operating systems. MS DOS
(and therefore Windows) uses method 3. Unix (including Linux) uses
method 2. Apple in its original MacOS used method 1, but now uses
method 2 since MacOS X is really a variant of Unix.

So how can the poor programmer cope with this multiplicity of line
endings? In many languages she just has to do lots of tests and take
different action per OS. In more modern languages, including Python,
the language provides facilities for dealing with the mess for you. In
the case of Python the assistance comes in the form of the os module
which defines a variable called linesep which is set to whatever the
newline character is on the current operating system. This makes adding
newlines easy, and rstrip() takes account of the OS when it does its
work of removing them, so really the simple way to stay sane, so far as
newlines are concerned is: always use rstrip() to remove newlines from
lines read from a file and always add os.linesep to strings being
written to a file.

That still leaves the awkward situation where a file is created on one
OS and then processed on another, incompatible, OS and sadly, there
isn't much we can do about that except to compare the end of the line
with os.linesep to determine what the difference is.
######################################



From uval at rz.uni-karlsruhe.de  Tue Feb  7 09:05:02 2006
From: uval at rz.uni-karlsruhe.de (=?ISO-8859-1?Q?Sch=FCle_Daniel?=)
Date: Tue, 07 Feb 2006 15:05:02 +0100
Subject: how to copy a Python object
In-Reply-To: <1139309738.750080.183090@g47g2000cwa.googlegroups.com>
References: <1139301392.205225.48690@o13g2000cwo.googlegroups.com>
	<1139308149.557027.77160@z14g2000cwz.googlegroups.com>
	<1139309738.750080.183090@g47g2000cwa.googlegroups.com>
Message-ID: <dsa2qr$89i$1@news2.rz.uni-karlsruhe.de>

mitsura at skynet.be wrote:
> Already thanks for the reply,
> 
> but how to write your own copy operator? Won't you always be passing
> referrences to new_obj?

for example this would work

 >>> class X(object):
...     def __init__(self,lst):
...             self.lst = lst
...     def copy(self):
...             return X(self.lst[:])
...     def __str__(self):
...             return "lst has id %i" % id(self.lst)
...
 >>> x=X([1,2,3])
 >>> y=x.copy()
 >>> print x
lst has id 1078097132
 >>> print y
lst has id 1078097228


but I don't like that in this case self.lst must be passed
through __init__
I can think of another variant

 >>> class Y(object):
...     def fill(self):
...             self.lst = [randint(i*10,(i+1)*10) for i in xrange(5)]
...     def __repr__(self):
...             return "lst has id = %i" % id(self.lst)
...     def copy(self):
...             ret = Y()
...             ret.lst = self.lst[:]
...             return ret
...
 >>> from random import randint
 >>> y=Y()
 >>> y.fill()
 >>> y
lst has id = 1078097452
 >>> print y
lst has id = 1078097452
 >>> x=y.copy()
 >>> x
lst has id = 1078097004

... anyone?
are there better approaches?

Regards, Daniel



From steve at holdenweb.com  Tue Feb 14 16:33:46 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 14 Feb 2006 16:33:46 -0500
Subject: how do you pronounce 'tuple'?
In-Reply-To: <1139904696.784092.224740@o13g2000cwo.googlegroups.com>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>	<1139863824.940773.36310@f14g2000cwb.googlegroups.com>	<dsr69f$epf$1@news.freedom2surf.net>
	<1139904696.784092.224740@o13g2000cwo.googlegroups.com>
Message-ID: <dstibn$ma3$1@sea.gmane.org>

Paddy wrote:
> Hmm,
> I've found a term for a large tuple, a muckle:
> 
> 
> http://www.google.co.uk/search?hl=en&q=define%3Amuckle&btnG=Search&meta=
> 
> Definitions of muckle on the Web:
> 
>     * batch: (often followed by `of') a large number or amount or
> extent; "a batch of letters"; "a deal of trouble"; "a lot of money";
> "he made a mint on the stock market"; "it must have cost plenty"
>       wordnet.princeton.edu/perl/webwn
> 
As in that well-known Scottish saying

   "Mony a mickle make a muckle"

meaning many small things add up to something great. Due, I believe, the 
the great Rabbie Burns.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From bignose+hates-spam at benfinney.id.au  Mon Feb 27 19:46:49 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 28 Feb 2006 11:46:49 +1100
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>
Message-ID: <873bi4z4w6.fsf@rose.polar.local>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
> Ben Finney <bignose+python at benfinney.id.au> writes:
>> Enumerations with no values are meaningless.  The exception
>> ``EnumEmptyError`` is raised if the constructor is called with no
>> value arguments.
>
> Why are empty enumerations not allowed?  Empty sets, empty lists,
> empty dictionaries are all allowed.  I don't see any obvious benefits
> to not allowing empty enumerations.

By way of explanation, my earlier implementations of this didn't have
enumerations as sequences. Now that the design has converged more on a
sequence and container idiom, I agree with you.

I'll amend the specification so empty enumerations are not an
error. (This will also remove the last remaining exception class from
the specification, making it cleaner still. Good.)

-- 
 \       "I love to go down to the schoolyard and watch all the little |
  `\   children jump up and down and run around yelling and screaming. |
_o__)          They don't know I'm only using blanks."  -- Emo Philips |
Ben Finney


From bdesth.quelquechose at free.quelquepart.fr  Tue Feb  7 17:15:39 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 07 Feb 2006 23:15:39 +0100
Subject: Object Oriented vs Pythonic Code, and Pythonic standards
In-Reply-To: <mailman.1561.1139337813.27775.python-list@python.org>
References: <mailman.1561.1139337813.27775.python-list@python.org>
Message-ID: <43e904a2$0$31862$626a54ce@news.free.fr>

Carl J. Van Arsdall a ?crit :
> It seems the more I come to learn about Python as a langauge and the way 
> its used I've come across several discussions where people discuss how 
> to do things using an OO model and then how to design software in a more 
> "Pythonic" way.

Well, Python being mostly OO (about 101% I'd say), doing things "the 
Pythonic way" and doing things "the OO way" often overlap.

> My question is, should we as python developers be trying to write code 
> that follows more of a python standard

Yes - given that this "standard" is a moving target (as Python grows and 
changes, so does pythonic idioms).

> or should we try to spend our 
> efforts to stick to a more traditional OO model?

Depends on what you call a "traditional OO model" !-)

> For example, in C++ I might make a file that defines a class and all its 
> methods, at which point I create an object and do things with it.  My 
> interpretation of what is "Pythonic" would be instead of creating a 
> class I would just define functions and maybe some variables global to a 
> module.  At this point, I import the module and just make function calls.

I think you should have a closer look at the standard lib. I did not run 
an exhaustive analysis, but it seems to me that it's mostly built around 
classes.

> There are many similarities here, but the difference is that in python I 
> don't feel as though I would define a class, I would just treat the 
> python module as a class instead, especially if it was a type of object 
> that I would only need a single instance of.

Strange enough, that's *exactly* what is it. Python modules *are* 
instances of class module - like functions are instances of class 
function, and even classes are themselves instance of their metaclasses...

I'm afraid that years of C++/Java/Ada/C# and other class-based, 
statically typed languages domination results in (too) many programmers 
confusing *object* oriented with *class* oriented.

As an example, most of the functional programming support in Python 
comes from the fact that functions are objects too (which is the first 
and mandatory requirement for fp) and that any class can also become a 
new 'type' of function. So, are Python's function decorators 
'functional' or 'oo' ? HigherOrderFunctions are of course typical of fp, 
but the way they work in Python is mostly OO (yes, this is the good old
Decorator pattern, applied to function objects...)

> The second question that arises from Pythonism is, has the community 
> drafted a standard for quality "Pythonic" code?

launch your Python interactive interpreter and type "import this"...



From crutcher at gmail.com  Sun Feb 26 00:00:18 2006
From: crutcher at gmail.com (Crutcher)
Date: 25 Feb 2006 21:00:18 -0800
Subject: Modify the local scope inside a function
In-Reply-To: <1140911588.659020.7640@i39g2000cwa.googlegroups.com>
References: <1140911588.659020.7640@i39g2000cwa.googlegroups.com>
Message-ID: <1140930018.790939.6780@z34g2000cwc.googlegroups.com>

Here you go. Unfortunate that you can't modify locals() easily, but
there are other options.

def foo(d):
  for k in d:
    exec '%s = %s' % (k, repr(d[k]))
  print a + b

foo({'a':1, 'b':2})



From fredrik at pythonware.com  Sun Feb 12 10:48:09 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 12 Feb 2006 16:48:09 +0100
Subject: Can I get the 8bit-string representation of any unicode string
References: <1139757073.364694.176200@g14g2000cwa.googlegroups.com>
Message-ID: <dsnlbr$i39$1@sea.gmane.org>

wanghz at gmail.com wrote:

> I have a problem when I'm processing unicode strings.  Is it possible
> to get the 8bit-string representation of any unicode string?
>
> Suppose I get a unicode string:
>   a = u'\xc8\xce\xcf\xcd\xc6\xeb';
> then, by
>   a.encode('latin-1');
> I can get the 8bit-string representation of it, that is, the physical
> storage format of this string.
>
> But for another kind of unicode string, say:
>   b = u'\u4efb\u8d24\u9f50';
> I have to:
>   b.encode('utf-8')
> to get the 8bit-string format of it.

latin-1 and utf-8 are two different 8-bit representations (encodings) of
Unicode.

> Since these unicode strings are given by an external library function,
> I don't know which kind a unicode string belongs to before I get it at
> runtime.  So, I wonder if there is a unified way to get the 8bit-string
> representation, say, byte-by-byte, of any unicode string?

since the Unicode character set contains 1.1 million code points, and a
single byte can contain 256 different values, it should be fairly obvious
that there's no "8 bit byte by byte" representation of a Unicode string.
you need to decide what 8-bit encoding to use, and stick to that.

</F>





From scott.daniels at acm.org  Fri Feb 24 10:43:20 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Fri, 24 Feb 2006 07:43:20 -0800
Subject: why don't many test frameworks support file-output?
In-Reply-To: <mailman.2386.1140744999.27775.python-list@python.org>
References: <mailman.2386.1140744999.27775.python-list@python.org>
Message-ID: <43ff27f1$1@nntp0.pdx.net>

kanchy kang wrote:
> 
> I don't think redirecting stdout to a file is a good resolution.
Nobody is suggesting:
     python program.py >output
or
     program.py >output

What is being suggested is:
     import sys
     import module
     original, sys.stdout = sys.stdout, open('output', 'w')
     try:
         module.main()
     finally:
         result, sys.stdout = sys.stdout, original
         size = result.tell()
         result.close()
         print size, 'bytes written to file "output"'

If, however, you want everyone else to conform to your personal idea
of "best practices," then hire them and tell them to do it your way.

--Scott David Daniels
scott.daniels at acm.org


From aisaac0 at verizon.net  Thu Feb 16 15:05:37 2006
From: aisaac0 at verizon.net (David Isaac)
Date: Thu, 16 Feb 2006 20:05:37 GMT
Subject: define loop statement?
Message-ID: <lW4Jf.31559$3V4.8390@trnddc06>

I would like to be able to define a loop statement
(nevermind why) so that I can write something like

loop 10:
    do_something

instead of

for i in range(10):
    do_something

Possible?  If so, how?

Thanks,
Alan Isaac




From kxroberto at googlemail.com  Sun Feb 12 16:07:40 2006
From: kxroberto at googlemail.com (Robert)
Date: Sun, 12 Feb 2006 22:07:40 +0100
Subject: Tracking down memory leaks?
In-Reply-To: <1139749861.949765.282310@z14g2000cwz.googlegroups.com>
References: <1139749861.949765.282310@z14g2000cwz.googlegroups.com>
Message-ID: <dso830$2nvq$1@ulysses.news.tiscali.de>

MKoool wrote:

> I have an application with one function called "compute", which given a
> filename, goes through that file and performs various statistical
> analyses.  It uses arrays extensively and loops alot.  it prints the
> results of it's statistical significance tests to standard out.  Since
> the compute function returns and I think no variables of global scope
> are being used, I would think that when it does, all memory returns
> back to the operating system.
> 
> Instead, what I see is that every iteration uses several megs more.
> For example, python uses 52 megs when starting out, it goes through
> several iterations and I'm suddenly using more than 500 megs of ram.
> 
> Does anyone have any pointers on how to figure out what I'm doing
> wrong?
> 

if gc.collect() doesn't help:

maybe objects of extension libs are not freed correctly.

And Python has a real skeleton in the cupboard:

a known problem with python object/libs when classes with __del__ are 
involved ( Once suffered myself from such tremendous "unexplainable" 
memory blow up until I found this "del gc.garbage[:]" remedy:

<http://www.python.org/doc/current/lib/module-gc.html>
garbage
     A list of objects which the collector found to be unreachable but 
could not be freed (uncollectable objects). By default, this list 
contains only objects with __del__() methods.3.1Objects that have 
__del__() methods and are part of a reference cycle cause the entire 
reference cycle to be uncollectable, including objects not necessarily 
in the cycle but reachable only from it. Python doesn't collect such 
cycles automatically because, in general, it isn't possible for Python 
to guess a safe order in which to run the __del__() methods. If you know 
a safe order, you can force the issue by examining the garbage list, and 
explicitly breaking cycles due to your objects within the list. Note 
that these objects are kept alive even so by virtue of being in the 
garbage list, so they should be removed from garbage too. For example, 
after breaking cycles, do del gc.garbage[:] to empty the list. It's 
generally better to avoid the issue by not creating cycles containing 
objects with __del__() methods, and garbage can be examined in that case 
to verify that no such cycles are being created.


Robert


From deets at nospam.web.de  Sat Feb 18 10:41:35 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 18 Feb 2006 16:41:35 +0100
Subject: Difference between CPython, Python for .NET and IronPython?
In-Reply-To: <pGGJf.5441$zc1.999@amstwist00>
References: <pGGJf.5441$zc1.999@amstwist00>
Message-ID: <45othgF7fog3U1@uni-berlin.de>

> For example, if I'm running IronPython, can I access modules such as Numeric
> and numarray?

AFAIK not. You can run pure python modules, but not extensions 
containing native code.

> As I understand it, interoperability with C# and .NET works in both
> directions with IronPython, but CPython modules cannot be imported, or? 

If they are pure python they can. However, there isn't e.g. a os-module 
in IronPython (at least on mono under MacOSX) - so I guess the situation 
is similar to Jython: you are basically limited to what the host-runtime 
delivers.

> With Python for .NET I can import the .NET Framework and continue using
> CPython modules, or?

Yes. It's a bridge. Problem is: you can't use Python-Objects in 
.NET-code, which is at least theoretically possible in IronPython (not 
sure if it has something like the jythonc of jython that makes that 
possible for jython, or if it can be done more automagically)

> 
> What is the roadmap for IronPython, will it be possible to import CPython
> modules in the near future?

I doubt it - it's just not the goal, after all you want the CLR 
precisely for _not_ needing bindings for C-libs on various platforms. 
However, I guess a goal is that you get all python modules in IronPython 
that are availablein the standard dist to make pure-python modules run 
out of the box. But I don't have any insights on that.

> One last question, is IronPython cross-platform. That is, can I use
> IronPython with Mono?


Yes, I did so under mono/MacOSX.

Diez


From rridge at csclub.uwaterloo.ca  Thu Feb  9 10:25:37 2006
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 9 Feb 2006 07:25:37 -0800
Subject: Replacing curses
In-Reply-To: <mailman.1642.1139461214.27775.python-list@python.org>
References: <mailman.1566.1139345769.27775.python-list@python.org>
	<43E9234B.6030108@v.loewis.de>
	<mailman.1588.1139372460.27775.python-list@python.org>
	<11uk55h47lruk18@corp.supernews.com>
	<mailman.1611.1139422272.27775.python-list@python.org>
	<11ukf0ci8d6ac64@corp.supernews.com>
	<mailman.1620.1139429435.27775.python-list@python.org>
	<11ul1mgplrah63e@corp.supernews.com>
	<1139451439.115775.223250@g43g2000cwa.googlegroups.com>
	<mailman.1642.1139461214.27775.python-list@python.org>
Message-ID: <1139498737.281215.106510@o13g2000cwo.googlegroups.com>

Ian Ward wrote:
> I'll have to deal with that anyway, since I'm doing all my own wrapping,
> justification and clipping of text.

In general it's impossible to know how many display positions some
random Unicode character might use.  For example, Chinese characters
normally take two display positions, but the terminal your using might
not support them and display a single width replacement character.
Hopefully, you're limitted in the character set you actually need to
support and the terminals that your applicaiton will be using.



From bonono at gmail.com  Tue Feb 21 04:53:49 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 21 Feb 2006 01:53:49 -0800
Subject: Little tool - but very big size... :-(
In-Reply-To: <mailman.2213.1140514942.27775.python-list@python.org>
References: <mailman.2211.1140513270.27775.python-list@python.org>
	<1140513852.240140.144160@f14g2000cwb.googlegroups.com>
	<mailman.2213.1140514942.27775.python-list@python.org>
Message-ID: <1140515628.982627.87420@g44g2000cwa.googlegroups.com>

I doubt you can do much then as you mentioned you need GUI which is why
there is the GUI related dll in the list(takes a large chunk of it),
then the necessary python runtime.

However, even for USB pen, I don't think 11M is that much a big deal.
We have digicam that can produce file size like that so finding a large
pen drive is not much of an issue. Worse come to worse, convince him to
use a 2.5" USB drive container. It is a bit bigger than USB pen drive
but can give you 20G+ without external power, just as convenient as a
pen drive.

Durumdara wrote:
> Hi !
>
> Yes, it is. But that tool is designed for USB PenDrive usage.
> The assessor is collect all tools it needed to see a machine(s) in the
> checked corporation.
> He/she needs little programs, because he need to store the results of
> the checkings too, not the tools only.
>
> So I need to minimalize the code size.
>
> Thanx for help:
> dd
>
> bonono at gmail.com wrote:
>
> >11MB is seldom a concern for today's machine.
> >
> >Durumdara wrote:
> >
> >
> >>Hi !
> >>
> >>I have a problem.
> >>I have a little tool that can get data about filesystems and wrote it in
> >>python.
> >>
> >>The main user asked me a GUI for this software.
> >>
> >>This user is needed a portable program, so I create this kind of the
> >>software with Py2Exe.
> >>
> >>But it have very big size: 11 MB... :-(
> >>
> >>The dist directory:
> >>2006.02.21.  10:09    <DIR>          .
> >>2006.02.21.  10:09    <DIR>          ..
> >>2005.09.28.  12:41            77 824 bz2.pyd
> >>2006.02.21.  10:09                 0 dirlist.txt
> >>2006.02.20.  12:51           611 384 library.zip
> >>2006.02.15.  16:22            23 558 main.ico
> >>2004.12.16.  17:22           348 160 MSVCR71.dll
> >>2005.09.28.  12:41         1 867 776 python24.dll
> >>2006.01.11.  12:19           102 400 pywintypes24.dll
> >>2005.09.28.  12:41           405 504 unicodedata.pyd
> >>2005.09.28.  12:41             4 608 w9xpopen.exe
> >>2006.01.11.  12:19            73 728 win32api.pyd
> >>2006.01.11.  12:20            81 920 win32file.pyd
> >>2006.01.11.  12:26           106 496 win32security.pyd
> >>2006.01.10.  19:09         4 943 872 wxmsw26uh_vc.dll
> >>2006.02.20.  12:51            40 960 wxPyHDDirList.exe
> >>2005.09.28.  12:41            69 632 zlib.pyd
> >>2006.01.10.  19:13           626 688 _controls_.pyd
> >>2006.01.10.  19:12           696 320 _core_.pyd
> >>2006.01.10.  19:13           364 544 _gdi_.pyd
> >>2006.01.10.  19:13           491 520 _misc_.pyd
> >>2006.01.10.  19:13           548 864 _windows_.pyd
> >>              20 file        11 485 758 byte
> >>
> >>I need to have more compressed result. Can I compress dll-s, pyd-s with
> >>Py2Exe ?
> >>Can I decrease the total size with something ?
> >>
> >>If not, how to I create an self-unpackager and self-starter program that
> >>use an temporary directory in the disk ? With WinRar ?
> >>
> >>Thanx for help:
> >>dd
> >>    
> >>
> >
> >  
> >



From cds at zentric.com  Sun Feb  5 10:17:41 2006
From: cds at zentric.com (Chris Ditze-Stephan)
Date: 5 Feb 2006 07:17:41 -0800
Subject: New Python.org website ?
In-Reply-To: <mailman.1435.1139151734.27775.python-list@python.org>
References: <c4qdnSebt6zPBCXeRVn-pQ@comcast.com>
	<dpaa87$2oa$1@panix3.panix.com>
	<LN2dnQMoFpiCWyfeRVn-sg@comcast.com>
	<43C4E198.2080107@holdenweb.com> <dqksuf$dlm$1@sea.gmane.org>
	<43CE35E5.8000604@pollenation.net> <dqnht5$rfq$1@sea.gmane.org>
	<43CF5FBF.5090901@pollenation.net> <xcNzf.110403$km.2313@edtnps89>
	<mailman.1435.1139151734.27775.python-list@python.org>
Message-ID: <1139152661.867723.197160@g14g2000cwa.googlegroups.com>

Hi

Fredrik Lundh schrieb:

> > <whisper>
> > If you build it, they will come.
> > </whisper>
>
> http://pydotorg.dyndns.org:8000
Have access-problem.
It's dnynds.org.
Perhabs not everytime Online?

bye

Chris Ditze-Stephan


> 
> </F>



___
Chris Ditze-Stephan
Zentric



From augustus.kling at gmail.com  Sat Feb 11 07:48:33 2006
From: augustus.kling at gmail.com (augustus.kling at gmail.com)
Date: 11 Feb 2006 04:48:33 -0800
Subject: How to check...
References: <1139660094.920792.136560@g14g2000cwa.googlegroups.com>
Message-ID: <1139662113.389812.128320@g43g2000cwa.googlegroups.com>

Hello,

try using regular expressions. I'afraid that i don't have any
documentation right here but i think there is a starting point for a
web search now.

Greetings



From johnjsal at NOSPAMgmail.com  Tue Feb 28 23:08:09 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 28 Feb 2006 23:08:09 -0500
Subject: Use empty string for self
In-Reply-To: <roy-6BE725.20225128022006@reader2.panix.com>
References: <1141170846.619246.163470@t39g2000cwt.googlegroups.com>
	<roy-6BE725.20225128022006@reader2.panix.com>
Message-ID: <ybednUSSkt30g5jZnZ2dnUVZ_vidnZ2d@rcn.net>

Roy Smith wrote:
> paullanier at gmail.com wrote:
>> Any comments?  Has this been discussed before?
> 
> Yes.  To death.  Executive summary: self is here to stay.

A related thing I was wondering about was the use of 'self' in class 
methods as the first parameter. I understand that right now it is 
necessary, but is this something that the language itself requires, or 
just the way it is implemented now? It seems like a waste of typing to 
always have to put self as the first parameter in every class method. Is 
there no way for it to be implied?


From sw at wordtech-software.com  Fri Feb 17 09:25:30 2006
From: sw at wordtech-software.com (Kevin Walzer)
Date: Fri, 17 Feb 2006 09:25:30 -0500
Subject: Mac OS X Installation Problem
In-Reply-To: <yEncExpress_Rulz!_www.techsono.com_3222994726@firstva.com>
References: <yEncExpress_Rulz!_www.techsono.com_3222994726@firstva.com>
Message-ID: <7899$43f5dcdb$4275d90a$31166@FUSE.NET>

Matt Trivisonno wrote:

> 
> My Tiger system had Python v2.3.5 on it and I threw the files in the trash 

It's not considered a good idea to trash Apple system files. It's likely
that system tools that depend on Python (CoreImage scripting comes to
mind) are now broken and the only way to fix this is to reinstall the OS.


-- 
Kevin Walzer
iReveal: File Search Tool
http://www.wordtech-software.com


From om at oliviermigeon.com  Fri Feb 24 17:22:03 2006
From: om at oliviermigeon.com (Olivier)
Date: Fri, 24 Feb 2006 23:22:03 +0100
Subject: Multiple versions of Python / PythonWin on the same machine?
In-Reply-To: <1140818895.436107.261820@p10g2000cwp.googlegroups.com>
References: <1140818895.436107.261820@p10g2000cwp.googlegroups.com>
Message-ID: <43ff863f$0$11092$636a55ce@news.free.fr>

dananrg at yahoo.com a ?crit :
> 
> Is it safe to install more than one version of Python / PythonWin on
> the same machine?

Sure, it is, just specify a different path for the installer. You'll 
probably want to create two scripts python21.bat and python24.bat and 
put them in your path to launch the relevant version at will.

Olivier


From plahey at alumni.caltech.edu  Mon Feb 20 16:12:23 2006
From: plahey at alumni.caltech.edu (plahey at alumni.caltech.edu)
Date: 20 Feb 2006 13:12:23 -0800
Subject: Processing text using python
In-Reply-To: <1140451760.998278.90430@g43g2000cwa.googlegroups.com>
References: <1140451760.998278.90430@g43g2000cwa.googlegroups.com>
Message-ID: <1140469943.922013.323760@g14g2000cwa.googlegroups.com>

Hi,

you have plenty of good responses.  I thought I would add one more:

def data_iter(file_name):
    data = file(file_name)
    while True:
        value = data.read(3)
        if not value:
            break
        yield value
    data.close()

With the above, you can grab the entire data set (3 characters at a
time) like so:

    data_set = [ d for d in data_iter('data') ]

Or iterate over it:

    for d in data_iter('data'):
        # do stuff

Enjoy!



From gregory.petrosyan at gmail.com  Mon Feb 13 15:32:59 2006
From: gregory.petrosyan at gmail.com (Gregory Petrosyan)
Date: 13 Feb 2006 12:32:59 -0800
Subject: Pythonic gui format?
In-Reply-To: <dsqocq$dcq$1@bagan.srce.hr>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<dsqocq$dcq$1@bagan.srce.hr>
Message-ID: <1139862779.383505.20890@g44g2000cwa.googlegroups.com>

Thanks for your reply.
But isn't python code more flexible than XML? I think it's not harder
to edit py file than xml file. Also python can give me more speed than
xml, and possibly python code can be integrated better with rest of app
(because of absence of extra layer called "XML"). Has anybody have had
(how many  grammar errorrs can you find here? :) some experience in
writing gui systems/formats "from scratch"?

IMO the strength of XML here is that it provides one, almost obvious,
format for gui description. And with Python, I can imagine hundreds of
them :)  (but maybe there are real gems, and after finding one I'll be
very happy?)



From hancock at anansispaceworks.com  Fri Feb  3 15:35:58 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Fri, 3 Feb 2006 14:35:58 -0600
Subject: would it be feasable to write python DJing software
In-Reply-To: <ds09ej$qbq$1@bagan.srce.hr>
References: <1138925819.465108.181760@o13g2000cwo.googlegroups.com>
	<druc1r$cre$1@bagan.srce.hr>
	<1138962918.427815.70300@g14g2000cwa.googlegroups.com>
	<drvdq6$gjq$1@bagan.srce.hr> <11u6t3qc13jplad@corp.supernews.com>
	<ds09ej$qbq$1@bagan.srce.hr>
Message-ID: <20060203143558.16459707@samwise.anansi>

On Fri, 03 Feb 2006 20:03:01 +0100
Ivan Voras <ivoras at fer.hr> wrote:
> Grant Edwards wrote:
> > On 2006-02-03, Ivan Voras <ivoras at __yahoo__.com_> wrote:
> > 
> >>simonwittber at gmail.com wrote:
> >>
> >>>Actually, manipulating and mixing audio samples can be
> >both fast and >>elegant, in Python, if you use Numeric or
> >a similar library. >
> >>... at which point you're actually doing it in C, not
> >pure python... :)
> > 
> > If that's the way you want to look at it, there is
> > nothing that can be done in pure python.  
> 
> I think people who say that deliberately misunderstand the
> point. Python  is suitable for some things, not for
> others. So is C. -- 

To me, "doing it in C" implies that I must write some C
code.

In this case, that won't be required at all. Everything the
OP wants to do can be done exclusively by writing Python
code.  He will, of course, be *using*  some extension
libraries which might in turn have been written in C (or
Fortran, assembly language, or ADA for that matter -- but
practically speaking, C).

This will be true whether he uses PyMedia, PyGame, Numeric
or all three.

Indeed, as an implementation matter only the "glue code"
will be interpreted in Python -- but the OP will not have to
write anything but such "glue code".

For me, who no longer writes *any* C code, not having to
write the C code is a big win. And I think this is the PoV
relevant to the OP.

Cheers,
Terry


-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From peter at engcorp.com  Sat Feb 25 09:11:33 2006
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 25 Feb 2006 09:11:33 -0500
Subject: Problem with Property
In-Reply-To: <TsydnRFxOJsBw53ZnZ2dnUVZ_tqdnZ2d@comcast.com>
References: <TsydnRFxOJsBw53ZnZ2dnUVZ_tqdnZ2d@comcast.com>
Message-ID: <dtpoij$qmv$3@sea.gmane.org>

"none <"@bag.python.org wrote:
> I'm trying to implement a simple repeateable property mechansism so I 
> don't have to write accessors for every single instance variable I have.
...

> Any ideas?

Yes, don't write accessors for every single instance variable you have. 
  In some languages that might be appropriate, or considered good style. 
  In Python, it's entirely unnecessary and you should just access 
instance variables directly when you want to, and in the odd case where 
you want to do something more than set/get/del them you can resort to 
properties (when a nice clear method wouldn't fit).

(Sorry not to answer the question directly.  If you feel you really need 
to use accessors then go ahead, but I just wanted you to know that many 
Python programmers feel quite differently about them than, say, C++ or 
Java programmers might.)

-Peter



From nicholas_wieland at noyahoospam.it  Wed Feb 15 08:01:06 2006
From: nicholas_wieland at noyahoospam.it (ngw)
Date: Wed, 15 Feb 2006 13:01:06 +0000 (UTC)
Subject: 'could not open display' error when import gtk  - how fix?
References: <1139967632.229372.8360@g47g2000cwa.googlegroups.com>
Message-ID: <dsv8mi$uan$2@area.cu.mi.it>

-seberino at spawar.navy.mil <seberino at spawar.navy.mil>:
> Why can't I import gtk (pygtk) module?  It appears gtk module want X
> perms?
>
>
>>>> import gtk
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "/usr/lib/python2.3/site-packages/gtk-2.0/gtk/__init__.py", line
> 37, in ?    from _gtk import *
> RuntimeError: could not open display

You have to run the pyshell under the right permissions. Are you
trying to import pygtk from the root/toor account ?

  ngw


From jaco at neottia.net  Wed Feb 22 15:23:17 2006
From: jaco at neottia.net (Eric Jacoboni)
Date: Wed, 22 Feb 2006 21:23:17 +0100
Subject: Question about struct.unpack
References: <m2bqwzxywv.fsf@titine.jacoboni.fr> <43fc9c67$1@nntp0.pdx.net>
Message-ID: <m23bibxhvu.fsf@titine.jacoboni.fr>

Scott David Daniels <scott.daniels at acm.org> writes:

Thanks for your explanations.

But :
>     nom = nomz.rstrip('\0')

doesn't work for me:

>>> nomz
'Dupont\x00\x80\xbf\xff\xf70\x8f\xe0u\xa4\x00\x00.8\xfe\xfe\xfe\xff\x80\x80\x80\x80'

>>> nom = nomz.rstrip('\0')
>>> nom
'Dupont\x00\x80\xbf\xff\xf70\x8f\xe0u\xa4\x00\x00.8\xfe\xfe\xfe\xff\x80\x80\x80\x80'


-- 
Eric Jacoboni, ne il y a 1444080064 secondes


From fredrik at pythonware.com  Tue Feb 14 14:17:28 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 14 Feb 2006 20:17:28 +0100
Subject: Location of Python modules
References: <1139854184.504114.46690@z14g2000cwz.googlegroups.com><1139854642.175799.165950@g43g2000cwa.googlegroups.com><1139854910.669876.84730@o13g2000cwo.googlegroups.com><43F0D1A7.8000501@v.loewis.de><1139856376.208422.182090@f14g2000cwb.googlegroups.com><1139857482.644028.272380@o13g2000cwo.googlegroups.com>
	<1139941691.577227.319270@g43g2000cwa.googlegroups.com>
Message-ID: <dstaca$ms7$1@sea.gmane.org>

Byte wrote:

> >if it is in the sys.path
>
> sys.path, what is this?

a variable in the sys module.  quoting from a reply that you might have
missed:

$ python -c "import sys; print sys.path"
['', '/usr/lib/python24.zip', '/usr/lib/python2.4', '/usr/lib/python2.4/plat-linux2',
'/usr/lib/python2.4/lib-tk', '/usr/lib/python2.4/lib-dynload',
'/usr/local/lib/python2.4/site-packages', '/usr/lib/python2.4/site-packages', ...

</F>





From kent at kentsjohnson.com  Fri Feb 24 10:10:59 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Fri, 24 Feb 2006 10:10:59 -0500
Subject: a little more help with python server-side scripting
In-Reply-To: <nTELf.1667$No6.38886@news.tufts.edu>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<dSoLf.1663$No6.38996@news.tufts.edu> <dtmhot$4t4$1@wake.carmen.se>
	<nTELf.1667$No6.38886@news.tufts.edu>
Message-ID: <43ff1d75$1_1@newspeer2.tds.net>

John Salerno wrote:
> Magnus Lycka wrote:
> 
>> The other option is ASP. You have been given information about
>> that already. Be aware that ASP does not imply VBScript. You can
>> use Python in ASP as long as that's enabled. It seems to be exactly
>> what you are asking for, so I don't understand why you seem to reject
>> it. Don't you like the file name endings?
> 
> 
> Maybe I'm misunderstanding what is meant when you say to use ASP. I'm 
> thinking that it involves having to learn another language (such as C# 
> with ASP.NET), instead of writing my code in Python. Is that not the case?

See http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B276494

The last example on this page is exactly what you have been asking for.

Kent


From sjdevnull at yahoo.com  Wed Feb 22 14:32:54 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 22 Feb 2006 11:32:54 -0800
Subject: Python vs. Lisp -- please explain
In-Reply-To: <mailman.2277.1140569863.27775.python-list@python.org>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com>
	<mailman.2160.1140440898.27775.python-list@python.org>
	<1140454473.335788@jetspin.drizzle.com>
	<pan.2006.02.20.21.59.12.636908@REMOVETHIScyber.com.au>
	<1140490302.639049@jetspin.drizzle.com>
	<mailman.2231.1140532613.27775.python-list@python.org>
	<1140539404.440390.172350@g44g2000cwa.googlegroups.com>
	<4866bea60602210948x10bff91elbff376bc8ec116f8@mail.gmail.com>
	<mailman.2277.1140569863.27775.python-list@python.org>
Message-ID: <1140636774.903785.269530@g44g2000cwa.googlegroups.com>

Carl Friedrich Bolz wrote:
> Chris Mellon wrote:
> > I've encountered a C scripting environment that works by using GCC to
> > compile each line as it is encountered, doing some magic to keep a
> > working compilation environment around.
> >
> > Interpreted? Compiled?
> >
>
> There is also the wonderful C interpreter cint:
>
> http://root.cern.ch/root/Cint.html
>
> so obviously C must be an interpreted language :-)

I was going to say "Don't forget EiC either", but it appears to have
vanished from the world.



From mac at calmar.ws  Wed Feb  8 06:42:12 2006
From: mac at calmar.ws (calmar)
Date: Wed, 8 Feb 2006 12:42:12 +0100
Subject: get output of cmd-line command under MS windows
Message-ID: <slrndujm8k.2uf.mac@news.calmar.ws>

Hi all,

unfotunately, 'commands.getstatusoutput(command)' does not work under
windows.

Would there be any alternative?

os.system also just provides the exit number I think.

thanks a lot, 
and cheers
marco


-- 
  calmar

          (o_  It rocks: LINUX + Command-Line-Interface
          //\
          V_/_                     http://www.calmar.ws


From aleaxit at yahoo.com  Wed Feb  8 10:53:39 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Wed, 8 Feb 2006 07:53:39 -0800
Subject: Python threading, and processes
References: <pan.2006.02.08.13.18.20.728051@digital-crocus.com>
	<44u9pgF41dv5U1@uni-berlin.de>
	<pan.2006.02.08.13.50.16.898625@digital-crocus.com>
Message-ID: <1hafkjg.a22ozv195fymaN%aleaxit@yahoo.com>

Robin Haswell <rob at digital-crocus.com> wrote:
   ...
> Cheers for that info. The thread's main tasks are getting webpages
> (spidering), the actual amount of processing done in each thread is
> minimal - that's why I'm confused by the CPU usage.

BTW, spidering is a great use case for async (even-driven) programming;
use Twisted (or even build on top of asyncore) and you'll easily
saturate your network bandwidth with modest CPU demands.


Alex


From iddw at hotmail.com  Mon Feb 13 15:51:56 2006
From: iddw at hotmail.com (Dave Hansen)
Date: Mon, 13 Feb 2006 14:51:56 -0600
Subject: simple math question
References: <RuWdnVmaD4Q23XPeRVn-tw@rcn.net>
	<JrSdnac_xMxYx3PenZ2dnUVZ_tmdnZ2d@rcn.net>
Message-ID: <ueh1v15ed6jq7527k2pihod4r68g1o69d0@4ax.com>

On Sat, 11 Feb 2006 16:43:33 -0500 in comp.lang.python, John Salerno
<johnjsal at NOSPAMgmail.com> wrote:

>John Salerno wrote:
>> Hi all. I'm just starting out with Python, so I'm a little slow right 
>> now. :)
>> 
>> Can someone explain to me why the expression 5 / -2 evaluates to -3, 
>> especially considering that -2 * -3 evaluates to 6?
>> 
>> I'm sure it has something to do with the negative number and the current 
>> way that the / operator is implemented, but why doesn't it evaluate to 
>> -2 instead?
>
>Thanks for the help guys! It's clearer to me now, and I think I was just 
>conceptualizing it the wrong way in the first place.

Probably not the "wrong" way, just a different way, especially if you
write C code.  

The C standard defines integer division as (something like) "the
integer part of the result, throwing away the fraction," which would
get you the value you expect.  

This also means the sign of the result of the C % operator matches the
sign of the numerator.  In Python, the sign matches the sign of the
denominator.

You could also describe the C scheme as "truncating towards zero."
Python (and my HP calculator) "truncates toward negative infinity."  I
suppose a third way to do it would be to "truncate towards positive
infinity," but I don't know of any concrete examples of this.  'Twould
seem counter-intuitive in any case...

Regards,
                                        -=Dave

-- 
Change is inevitable, progress is not.


From webraviteja at gmail.com  Wed Feb 22 00:21:50 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 21 Feb 2006 21:21:50 -0800
Subject: What are COM-enabled applications?
In-Reply-To: <1140580133.293283.322870@f14g2000cwb.googlegroups.com>
References: <1140580133.293283.322870@f14g2000cwb.googlegroups.com>
Message-ID: <1140585709.958142.30660@f14g2000cwb.googlegroups.com>

COM is Windows only. (Actually there is DCOM for Linux, but that's
another story).

Read about it here.
http://en.wikipedia.org/wiki/Component_object_model



From nephish at xit.net  Mon Feb  6 16:09:18 2006
From: nephish at xit.net (nephish at xit.net)
Date: 6 Feb 2006 13:09:18 -0800
Subject: in over my head ascii
In-Reply-To: <1139259694.603482.293660@g14g2000cwa.googlegroups.com>
References: <1139245216.350356.272170@z14g2000cwz.googlegroups.com>
	<sk4fu1ljvt7h7d6euj7nq06e1e0ml8p8u5@4ax.com>
	<1139251420.501345.91850@g44g2000cwa.googlegroups.com>
	<1139256817.218319.160370@f14g2000cwb.googlegroups.com>
	<1139259694.603482.293660@g14g2000cwa.googlegroups.com>
Message-ID: <1139260158.822523.308780@g47g2000cwa.googlegroups.com>

i know that those characters exist, the docs say that the server does
not want the special "ETX" and "STX" characters, but the 3 ascii
characters "STX" and "ENX" i am not sure why.



From jra at baylink.com  Wed Feb  1 16:51:56 2006
From: jra at baylink.com (Jay R. Ashworth)
Date: Wed, 1 Feb 2006 16:51:56 -0500
Subject: LDTP 0.3.0 released !!!
In-Reply-To: <43E135D50200004400003D54@lucius.provo.novell.com>;
	from A Nagappan <anagappan@novell.com> on Wed, Feb 01, 2006 at
	09:57:33AM -0700
References: <43E135D50200004400003D54@lucius.provo.novell.com>
Message-ID: <20060201165156.B17644@cgi.jachomes.com>

On Wed, Feb 01, 2006 at 09:57:33AM -0700, A Nagappan wrote:
>   LDTP community has reached another important milestone with the
> release of LDTP 0.3.0. This release features the new architecture which
> is a result of more than 3 months of hard work by the LDTP community.
> This newsletter also includes latest news on our approach towards
> achieving an automated test engine. Useful references have been included
> at the end of this article for those who wish to hack/use LDTP.

Congratulations.  But please don't forget to include the one paragraph
precis of what your package *is* and does, at the top of all such
announcements?

Cheers,
-- jra
-- 
Jay R. Ashworth                                                jra at baylink.com
Designer                          Baylink                             RFC 2100
Ashworth & Associates        The Things I Think                        '87 e24
St Petersburg FL USA      http://baylink.pitas.com             +1 727 647 1274

	A: No.
	Q: Should I include quotations after my message body?


From grflanagan at yahoo.co.uk  Thu Feb 23 10:55:39 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 23 Feb 2006 07:55:39 -0800
Subject: Detec nonascii in a string
References: <mailman.2354.1140708758.27775.python-list@python.org>
Message-ID: <1140710139.190445.278090@g44g2000cwa.googlegroups.com>

Sebastian Bassi wrote:
> Hello,
>
> How do I detect non-ascii letters in a string?
> I want to detect the condition that a string have a letter that is not
> here: string.ascii_letters
>
> Best regards,
> SB.
>
> --
> Bioinformatics news: http://www.bioinformatica.info
> Lriser: http://www.linspire.com/lraiser_success.php?serial=318


see:

http://groups.google.com/group/comp.lang.python/browse_thread/thread/9011319757576f45/

eg.  ord(max(string)) < 128     ( Scott David Daniels ).


Gerard



From lycka at carmen.se  Wed Feb  8 07:49:12 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 08 Feb 2006 13:49:12 +0100
Subject: 450 Pound Library Program
In-Reply-To: <1139351498.090768.82270@o13g2000cwo.googlegroups.com>
References: <1139351498.090768.82270@o13g2000cwo.googlegroups.com>
Message-ID: <dscpc8$5ki$1@wake.carmen.se>

just a few style notes...

>     def checkOutBook(self, readerName):
>         "'Remove book from the front of the list, block if no books are
> available'"

I don't understand what "' is supposed to imply. If you
meant to use triple quoting, you need to use ''' or """.
Then the string can contain line breaks. (Perhaps you have
a really stupid email client/news client/editor/whatever that
replaces ''' with "'? Please loose that or use """.)

Also, please use lines that are short enough not to wrap
around. Line wrapping makes the code very ugly. Do like this:

     def checkOutBook(self, readerName):
         """Remove book from the front of the list, block if no
            books are available."""

[...]
>         for line in theBookFile.readlines():

In modern Python you simply write:
         for line in theBookFile:

>             L = line.split (",")  # a comma-delimited list
>             author = L[0]
>             bookName =  L[1]

Why bother with L? The follwing is as clear I think, and solves
the problem of commas in the title. Also, don't put a space between
the callable and the parenthesis please. See the Python style guide,
PEP 008.

             author, bookName = line.split(",", 2)

[...]
>     totalBooks = input("How many books would you like in the
> Library?[1-" + str(len(stacks)) + "]")

Again, don't make the lines so long. You don't have to do that.
You can break lines freely inside (), {} and [], and adjacent
string literals are automatically concatenated.

     totalBooks = input("How many books would you like in "
                        "the Library?[1-%d]" % len(stacks))


From wmmeyer at gmail.com  Tue Feb 28 09:14:04 2006
From: wmmeyer at gmail.com (William Meyer)
Date: Tue, 28 Feb 2006 14:14:04 +0000 (UTC)
Subject: comple list slices
Message-ID: <loom.20060228T143654-381@post.gmane.org>

Hi,

I have a list of rows which contains a list of cells (from a html table), and I
want to create an array of logical row groups (ie group rows by the rowspan). I
am only concerned with checking the rowspan of specific columns, so that makes
it easier, but I am having trouble implementing it in python. In perl/c I could
use a for loop and modify the control variable as I walked the array:

my (@rowgroups);
for (my ($i) = 0; $i < $#rows; $i++) {
    my ($rowspan) = $rows[$i][0]->attr("rowspan") || 1;
    $rowspan--; # 0 indexed

    push @rowgroups, $rows[$i .. $i+$rowspan];

    $i += $rowspan;
}

but in python I can only come up with this:

rowgroups = []
rowspan = 0
for i in rows:
    if rowspan > 0:
        rowspan -= 1
        continue

    rowspan = rows[j][0]["rowspan"] or 1
    rowgroups.append(rows[ rows.index(i) : rows.index(i) + rowspan ])

    rowspan -= 1

I really dont like this solution. Any ideas?



From dpickles at pacbell.net  Sat Feb 25 21:06:15 2006
From: dpickles at pacbell.net (dpickles at pacbell.net)
Date: 25 Feb 2006 18:06:15 -0800
Subject: How to Mount/Unmount Drives on Windows?
Message-ID: <1140919575.691402.70970@i40g2000cwc.googlegroups.com>

Hello,

I am creating a simple application that will reside in the Windows
system tray. The purpose of the program is to mount or unmount external
hard drives or flash memory devices, and to set their default states
(ie mounted or unmounted) at startup.

I do not know how to mount or unmount drives on Windows. I think that
it could possibly be done with a DOS command (using os.system()).

Thank you for any information you may have.



From http  Fri Feb 10 12:36:03 2006
From: http (Paul Rubin)
Date: 10 Feb 2006 09:36:03 -0800
Subject: Tkinter, X-windows and ebay
References: <1tqdncP3Ps7s6XfenZ2dnUVZ_tGdnZ2d@nmt.edu>
	<3bidnfcf041EVXHeRVn-gA@nmt.edu>
Message-ID: <7xacczt8u4.fsf@ruckus.brouhaha.com>

"Bob Greschke" <bob at passcal.nmt.edu> writes:
> What I came up with was the user can just create a text file (a kind
> of a transaction log of what things were done to the copy of the
> database on his machine), then cut and paste that text into a window
> created on their machine by the main database program (using
> X-windows, ssh, etc.), then the main program can read the contents
> of that text field and update the main copy of the database.
> 
> It should work. :)

Yuck!  Why not use an http interface instead of the remote tkinter
interface?  Then the user would interact with your app through a web
browser, giving a familiar UI as well as giving that upload button
(which tells the browser to upload the file).


From aisaac0 at verizon.net  Sat Feb 18 17:56:46 2006
From: aisaac0 at verizon.net (David Isaac)
Date: Sat, 18 Feb 2006 22:56:46 GMT
Subject: define loop statement?
References: <lW4Jf.31559$3V4.8390@trnddc06>
	<T4LJf.14256$915.10437@southeast.rr.com>
Message-ID: <OCNJf.1440$0z.818@trnddc01>


> Alan Isaac wrote:
> > I would like to be able to define a loop statement
> > (nevermind why) so that I can write something like
> >
> > loop 10:
> >     do_something
> >
> > instead of
> >
> > for i in range(10):
> >     do_something
> >
> > Possible?  If so, how?


"Jeffrey Schwab" <jeff at schwabcenter.com> wrote in message
news:T4LJf.14256$915.10437 at southeast.rr.com...
> class Loop:
>  def __init__(self, n):
>   self.n = n
>  def __call__(self):
>   self.n = self.n - 1
>   return self.n != 0
>
>
> if __name__ == '__main__':
> loop = Loop(10)
> while loop():
>  print "OK"

OK, that's pretty good.
Thanks!
Alan Isaac




From onurb at xiludom.gro  Fri Feb 17 10:53:41 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Fri, 17 Feb 2006 16:53:41 +0100
Subject: Checkbuttons in a Text widget
In-Reply-To: <1140190108.192983.287630@g14g2000cwa.googlegroups.com>
References: <1140190108.192983.287630@g14g2000cwa.googlegroups.com>
Message-ID: <43f5f1a4$0$26599$636a55ce@news.free.fr>

Lou G wrote:
> I'm trying to show a number of Checkbuttons (each with associated text
> based on a list of names) inside a y-scrollable Text widget like so:
> 
> [ ] Bob
> [ ] Carol
> [ ] Ted
> [ ] Alice
> etc.
> etc.

I really doubt there's a GUI toolkit supporting such a 'feature'. As
it's name implies, a TextBox is meant to edit *text*.

I suppose what you need is a scrollable widget allowing multiple
selection. In most GUI toolkits I'v seen, this is usually done with a
Grid (ie table) widget.


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From johnjsal at NOSPAMgmail.com  Sat Feb 11 19:43:44 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Sat, 11 Feb 2006 19:43:44 -0500
Subject: installing python on a server?
In-Reply-To: <mbssu1h9atu6i8h2o311932nbksbkmeluh@4ax.com>
References: <PB6Hf.1596$No6.37972@news.tufts.edu>
	<hntpu1pmctfaa61ns32k539nisvvljd96n@4ax.com>
	<DV6Hf.1597$No6.37987@news.tufts.edu>
	<1139610715.439681.185510@g44g2000cwa.googlegroups.com>
	<dvCdnRdmMdre43DeRVn-gw@rcn.net>
	<21bsu1dpb4nabbq04fdpubkidj23dh379j@4ax.com>
	<RuWdnViaD4SI3HPeRVn-tw@rcn.net>
	<mbssu1h9atu6i8h2o311932nbksbkmeluh@4ax.com>
Message-ID: <QLOdnRISaaZjGXPenZ2dnUVZ_sWdnZ2d@rcn.net>

Dennis Lee Bieber wrote:
> On Sat, 11 Feb 2006 14:53:38 -0500, John Salerno
> <johnjsal at NOSPAMgmail.com> declaimed the following in comp.lang.python:
> 
>> I guess it might be the latter. What I want is to add Python capability 
>> to the server where my website is running, so that I can write Python 
>> web apps and incorporate them into my HTML files.
> 
> 	Unfortunately then, you have to ask the owners of the server
> hardware if /they/ will give you that capability. (If you own the server
> then we are back to the first side -- you need admin/root access to
> install/configure the webserver to allow Python)
> 
> 	Many ISP's basic (home user, say) accounts are lucky to allow
> anything more complex than a hit-counter. Netcom
> (->Mindspring->Earthlink) used to have a scheme by which one could
> create data entry forms; the submit button had to be set to a
> pre-defined (ISP supplied action) which did nothing more than package
> all the CGI field information into an email, and send the email to a
> user-defined email address. There was no instantaneous feedback possible
> (unless one had the ability to read the email with a program, perform
> the updates locally, and upload a response to the website in time for a
> timed refresh to find the page).
> 
> 	The next step up tends to be sites built using things like
> Zope/CMF/Plone -- but even those servers require pure Python logic to be
> "installed" as a "product"; and only certain accounts have that
> privilege -- others are restricted to things like Zope's DTML, TAL, etc.
> templating languages to manipulate data.
> 
> 	Above that would be something like Apache with Python defined as a
> valid scripting language AND with security set to allow users to
> upload/install scripts.

Thanks. I'll have to check with my domain host, but I guess it might not 
be possible.


From jgardner at jonathangardner.net  Sat Feb 18 00:57:28 2006
From: jgardner at jonathangardner.net (Jonathan Gardner)
Date: 17 Feb 2006 21:57:28 -0800
Subject: Difference: __iadd__ and __add__
In-Reply-To: <1140228134.408383.182270@o13g2000cwo.googlegroups.com>
References: <pdlcv1lcroqifqcsjjjj3s4dtki3n1a5df@4ax.com>
	<1140228134.408383.182270@o13g2000cwo.googlegroups.com>
Message-ID: <1140242247.989089.43460@f14g2000cwb.googlegroups.com>

I would like to point out that it isn't entirely obvious where to find
documentation for this particular thing. I know from experience where
to go, but I remember spending a long time trying to hunt this down.

For reference, you may want to check out the index of the language
reference manual.

http://www.python.org/doc/2.4.2/ref/genindex.html



From lycka at carmen.se  Wed Feb 22 07:37:00 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 22 Feb 2006 13:37:00 +0100
Subject: embedding python in HTML
In-Reply-To: <gulJf.1641$No6.38356@news.tufts.edu>
References: <GD5Jf.1637$No6.38292@news.tufts.edu>
	<t6q9v1p2qcr0ntsau8i6q5glk89pfb4epq@4ax.com>
	<8n6Jf.1640$No6.38203@news.tufts.edu>
	<43f4f98e$0$16930$636a55ce@news.free.fr>
	<bpCdne1jK5jC1GjeRVn-gw@rcn.net> <43f569b6$1@nntp0.pdx.net>
	<gulJf.1641$No6.38356@news.tufts.edu>
Message-ID: <dthltd$52i$1@wake.carmen.se>

John Salerno wrote:
> Thanks, that makes much more sense to me now. But does this mean I can 
> still write HTML normally? What would an example be of having HTML 
> within a Python script? I have a hard time picturing this, because I 
> imagine that most of my pages will be almost all HTML, with just a bit 
> of Python here and there, perhaps to insert headers and footers. Is all 
> the HTML just wrapped in a big print statement, or something like that?

Imagine for instance, that you have an HTML file where you
want to print a current timestamp when the page is displayed.

A simple way to do this would be to just give your HTML file
another extension (e.g. .tmpl, short for template). Keep the
file as it is, just put the text

    %(timestamp)s

in the place(s) where you want your timestamp to appear
in the HTML file.

In your CGI script you can then do something like this:

#!/usr/bin/python -u
import time
print "Content-type: text/html\n"
text = open('myfile.tmpl).read()
print text % ('timestamp':time.asctime())

The inital Content-type line is important, and it must be
followed by a blank line before the actual content.

Look at the cgitb module too.

Instead of the common Python % interpolation, you could use
string.Template (with a current Python) or one of the many
templating systems around. Since your needs are likely to
grow, you might also want to have a look at one of the many
tool kits for Python and the web. Right now, it seems that
django and turbogears are the most popular. Cherrypy and
web.py are somewhat smaller and simpler systems. Unless you
use one of these tool kits, your homegrown code might turn
into yet another web tool kit eventually, and we have enough
of them already... (Too many I'd say...)

You should also note that traditional CGI scripts are rather
slow with Python, since Python's startup time is significant.
A system where the Python interpreter is already running, as
mod_python embedded in Apache is faster. But by all means, try
it as CGI. It might well be enough for your needs. It's been
ok for me.


From phillip.sitbon at gmail.com  Sun Feb  5 20:03:40 2006
From: phillip.sitbon at gmail.com (Phillip Sitbon)
Date: 5 Feb 2006 17:03:40 -0800
Subject: Reverse of map()?
Message-ID: <1139187820.735831.240570@f14g2000cwb.googlegroups.com>

Hello there,

I have a situation where a list of functions need to be called with a
single set of parameters and the result constructed into a tuple. I
know there's simple ways to do it via list comprehension:

Result = tuple(  [ fn(* Args, ** Kwds) for fn in fn_list ]  )

I'd hope there's a more efficient way to do this with a built-in
function, so that I could call:

Result = rmap( fn_list, * Args, ** Kwds )

and have it constructed as a tuple from the get-go.

Is there a built-in function that would allow me to do this, or do I
have to go with the list comprehension?



From pydecker at gmail.com  Mon Feb 13 08:51:27 2006
From: pydecker at gmail.com (Peter Decker)
Date: Mon, 13 Feb 2006 08:51:27 -0500
Subject: Python equivilant to msgbox()
In-Reply-To: <7528bcdd0602130516p76caa58dtc213300a1e0a14d8@mail.gmail.com>
References: <7CQHf.2690$7C3.1780@trnddc08> <43efd40a$1_2@newspeer2.tds.net>
	<1139794076.321041.320480@g43g2000cwa.googlegroups.com>
	<ca55a9900602130502p17c6d20blbe0d7652393defcd@mail.gmail.com>
	<7528bcdd0602130516p76caa58dtc213300a1e0a14d8@mail.gmail.com>
Message-ID: <ca55a9900602130551y74c02edahddce47640a0003f2@mail.gmail.com>

On 2/13/06, Andre Roberge <andre.roberge at gmail.com> wrote:

> While I agree that dabo's version is more Pythonic than wxPython, my
> understanding is that dabo is built on top of wxPython.

Yes. You get all the power of wxPython without having to deal with the
C++ style of coding.

> There are
> other framework (wax, anygui) that also aim to make the coding "more
> pythonic", hiding "ugly" wxPython details.  Personnally, I am hesitant
> to start using an extra layer on top of wxPython, with no guarantee
> that it will be always updated.  Ideally, something like dabo+wxPython
> would become part of the standard Python distribution.

I think the chances of Dabo not getting updated are about the same as
wxPython not getting updated. The authors have been highly active and
involved for a few years now, unlike Wax or anygui. Bugs get fixed in
hours usually, and enhancements to the tools are always being
released.

It would be way cool if the Powers that Be would adopt Dabo/wxPython
as part of the language. The combination is so much more powerful and
much better looking than Tkinter.

> The original post was asking if it was possible to have such message
> dialogs using Python, without having a full gui app.  I'd say that the
> answer is yes... and that one has a lot of options, depending on how
> many packages one is ready to download.

Oh, I understand your response. But I know that when people who are
familiar with Python first see wxPython code, their first reaction is
usually not positive. I was just trying to show that you can create
UIs easily and Pythonically.

--

# p.d.


From roy at panix.com  Mon Feb 13 22:04:07 2006
From: roy at panix.com (Roy Smith)
Date: Mon, 13 Feb 2006 22:04:07 -0500
Subject: how do you pronounce 'tuple'?
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
	<mailman.1857.1139863723.27775.python-list@python.org>
	<Wj6If.1606$No6.38150@news.tufts.edu> <dsqtq7$mju$1@online.de>
	<ieGdnfpVlNsJ3WzenZ2dnUVZ_t2dnZ2d@speakeasy.net>
Message-ID: <roy-E3EB19.22040713022006@reader2.panix.com>

Erik Max Francis <max at alcyone.com> wrote:
> (A 2-tuple is an "ordered pair" in mathematics.)  If a 2-tuple is a 
> pair, then it would seem to follow that a 1-tuple is a single.

Yeah, but an *ordered* single :-)

A more interesting question is what do you call ()?  A none-tuple?


From exarkun at divmod.com  Thu Feb 16 09:17:41 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 16 Feb 2006 09:17:41 -0500
Subject: any ftpd written in python?
In-Reply-To: <43F416BB.8050905@gmail.com>
Message-ID: <20060216141741.6122.1938359889.divmod.quotient.547@ohm>

On Thu, 16 Feb 2006 14:07:55 +0800, Kenneth Xie <mailinglist4ken at gmail.com> wrote:
>I need a simple ftpd example in pure python. Is there already such a
>ftpd available?
>Thank you very much in advance.

Twisted includes an FTP server:

  exarkun at kunai:~$ mkdir a a/b a/c a/d
  exarkun at kunai:~$ mktap ftp --root a
  exarkun at kunai:~$ twistd -f ftp.tap 
  exarkun at kunai:~$ ftp localhost 2121
  Connected to kunai.
  220 Twisted SVN-Trunk FTP Server
  Name (localhost:exarkun): anonymous
  331 Guest login ok, type your email address as password.
  Password:
  230 Anonymous login ok, access restrictions apply.
  Remote system type is UNIX.
  Using binary mode to transfer files.
  ftp> ls
  200 PORT OK
  125 Data connection already open, starting transfer
  drwxr-xr-x   2 exarkun   exarkun              4096 Feb 16 14:15 b
  drwxr-xr-x   2 exarkun   exarkun              4096 Feb 16 14:15 c
  drwxr-xr-x   2 exarkun   exarkun              4096 Feb 16 14:15 d
  226 Transfer Complete.
  ftp> quit
  221 Goodbye.

Jean-Paul


From xavier.morel at masklinn.net  Tue Feb  7 16:33:49 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Tue, 07 Feb 2006 22:33:49 +0100
Subject: tricky regular expressions
In-Reply-To: <1139343779.721205.221410@f14g2000cwb.googlegroups.com>
References: <1139343779.721205.221410@f14g2000cwb.googlegroups.com>
Message-ID: <dsb3gd$d5o$1@apollon.grec.isp.9tel.net>

Ernesto wrote:
> I'm not sure if I should use RE's or some other mechanism.  Thanks
> 
I think a line-based state machine parser could be a better idea. Much 
simpler to build and debug if not faster to execute.


From python at hope.cz  Sat Feb 11 07:14:54 2006
From: python at hope.cz (Lad)
Date: 11 Feb 2006 04:14:54 -0800
Subject: How to check...
Message-ID: <1139660094.920792.136560@g14g2000cwa.googlegroups.com>

Hello,
How can I  check that a string does NOT contain NON English characters?
Thanks
L.



From onurb at xiludom.gro  Tue Feb  7 13:04:03 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Tue, 07 Feb 2006 19:04:03 +0100
Subject: Too Many if Statements?
In-Reply-To: <1139332178.557744.73030@g47g2000cwa.googlegroups.com>
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<43e8d21b$0$32168$626a54ce@news.free.fr>
	<1139332178.557744.73030@g47g2000cwa.googlegroups.com>
Message-ID: <43e8e12c$0$27905$626a54ce@news.free.fr>

slogging_away wrote:
> I don't consider myself to be a seasoned programmer

nor do I.

> so if you mean
> redesigning the script to make the checks and therefore reduce the
> number of 'if' statements, I'm not sure if that can be done. 

I strongly doubt it could *not* be done !-)

> The
> script needs to make numerous checks for the existence of particular
> strings within the configuration file.  It also uses 'if' statements to
> determine what type of file is being examined, etc.. If an error is
> encounterd it writes warning messages to a master file.  

Yeps, that's pretty common with this kind of scripts. I recently had a
script doing thousands of regexp substitutions, image resizing, file
moves, database inserts etc, and of course a fair amount of logging. And
I can tell you that there many few "if" in this code.

> I guess what I
> am trying to say is that in order to make the many checks on the
> configuration files I do not know of any other way than to check for
> the existance of particular statements, (strings), and then report on
> those if they are incorrect or missing - hence at least one 'if'
> statement for every check. 

Suppose you have to match a line against a list of regexp and log if it
doesn't match. You could of course repeat the whole code for each
regexp, ie:

if not re.match(r'a/regexp/here', line):
  log('a first message')

if not re.match(r'another/regexp/here', line):
  log('another message')

(... 150 regexps later ...)

if not re.match(r'150/regexps/later', line):
  log('pfww, getting tired of copy/pasting')

etc...

But you could also factor much of it:

def checkMatch(line, regexp, msg):
  if not re.match(regexp, line):
    log(msg)

then have a list of regexps/messages pairs and:
  for exp, msg in regexps:
    checkMatch(line, exp, msg)

And now, you can add as many thousands regexps you want, you still have
one (and only one) if in the code (well, in this snippet at least...).

> I appreciate the feedback though!

You're welcome !-)



-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From johnzenger at gmail.com  Mon Feb 27 10:21:35 2006
From: johnzenger at gmail.com (johnzenger at gmail.com)
Date: 27 Feb 2006 07:21:35 -0800
Subject: how do I factor a number down to one digit?
In-Reply-To: <1141036302.641818.72570@i39g2000cwa.googlegroups.com>
References: <1141036302.641818.72570@i39g2000cwa.googlegroups.com>
Message-ID: <1141053695.219278.12920@v46g2000cwv.googlegroups.com>

Your tools are:

1.  "map" lets you apply a function to every element of a list.
Strings are lists.  (List comprehensions let you do the same thing, but
"map" is better to use if you are turning in homework).
2.  "sum" lets you calculate the sum of all numbers in a list.
3.  "val" and "str" let you turn strings into numbers and numbers into
strings

The only missing piece is a function that turns a letter into a number.
 It shouldn't be that hard to write one.



From bignose+python at benfinney.id.au  Sun Feb 26 21:49:52 2006
From: bignose+python at benfinney.id.au (Ben Finney)
Date: Mon, 27 Feb 2006 13:49:52 +1100
Subject: PEP 354: Enumerations in Python
Message-ID: <87accdplbj.fsf@rose.polar.local>

Howdy all,

PEP 354: Enumerations in Python has been accepted as a draft PEP. The
current version can be viewed online:

    <URL:http://www.python.org/peps/pep-0354.html>

Here is the reStructuredText source as it is today. Please discuss it
here so I can see what issues people may have.


PEP:            354
Title:          Enumerations in Python
Version:        $Revision: 42186 $
Last-Modified:  $Date: 2006-01-26 11:55:20 +1100 (Thu, 26 Jan 2006) $
Author:         Ben Finney <ben+python at benfinney.id.au>
Status:         Draft
Type:           Standards Track
Content-Type:   text/x-rst
Created:        20-Dec-2005
Python-Version: 2.6
Post-History:   20-Dec-2005


Abstract
========

This PEP specifies an enumeration data type for Python.

An enumeration is an exclusive set of symbolic names bound to
arbitrary unique values.  Values within an enumeration can be iterated
and compared, but the values have no inherent relationship to values
outside the enumeration.


Motivation
==========

The properties of an enumeration are useful for defining an immutable,
related set of constant values that have a defined sequence but no
inherent semantic meaning.  Classic examples are days of the week
(Sunday through Saturday) and school assessment grades ('A' through
'D', and 'F').  Other examples include error status values and states
within a defined process.

It is possible to simply define a sequence of values of some other
basic type, such as ``int`` or ``str``, to represent discrete
arbitrary values.  However, an enumeration ensures that such values
are distinct from any others, and that operations without meaning
("Wednesday times two") are not defined for these values.


Specification
=============

An enumerated type is created from a sequence of arguments to the
type's constructor::

    >>> Weekdays = enum('sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat')
    >>> Grades = enum('A', 'B', 'C', 'D', 'F')

Enumerations with no values are meaningless.  The exception
``EnumEmptyError`` is raised if the constructor is called with no
value arguments.

The values are bound to attributes of the new enumeration object::

    >>> today = Weekdays.mon

The values can be compared::

    >>> if today == Weekdays.fri:
    ...     print "Get ready for the weekend"

Values within an enumeration cannot be meaningfully compared except
with values from the same enumeration.  The comparison operation
functions return ``NotImplemented`` [#CMP-NOTIMPLEMENTED]_ when a
value from an enumeration is compared against any value not from the
same enumeration or of a different type::

    >>> gym_night = Weekdays.wed
    >>> gym_night.__cmp__(Weekdays.mon)
    1
    >>> gym_night.__cmp__(Weekdays.wed)
    0
    >>> gym_night.__cmp__(Weekdays.fri)
    -1
    >>> gym_night.__cmp__(23)
    NotImplemented
    >>> gym_night.__cmp__("wed")
    NotImplemented
    >>> gym_night.__cmp__(Grades.B)
    NotImplemented

This allows the operation to succeed, evaluating to a boolean value::

    >>> gym_night = Weekdays.wed
    >>> gym_night < Weekdays.mon
    False
    >>> gym_night < Weekdays.wed
    False
    >>> gym_night < Weekdays.fri
    True
    >>> gym_night < 23
    False
    >>> gym_night > 23
    True
    >>> gym_night > "wed"
    True
    >>> gym_night > Grades.B
    True

Coercing a value from an enumeration to a ``str`` results in the
string that was specified for that value when constructing the
enumeration::

    >>> gym_night = Weekdays.wed
    >>> str(gym_night)
    'wed'

The sequence index of each value from an enumeration is exported as an
integer via that value's ``index`` attribute::

    >>> gym_night = Weekdays.wed
    >>> gym_night.index
    3

An enumeration can be iterated, returning its values in the sequence
they were specified when the enumeration was created::

    >>> print [str(day) for day in Weekdays]
    ['sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat']

Values from an enumeration are hashable, and can be used as dict
keys::

    >>> plans = {}
    >>> plans[Weekdays.sat] = "Feed the horse"

The normal usage of enumerations is to provide a set of possible
values for a data type, which can then be used to map to other
information about the values::

    >>> for report_grade in Grades:
    ...     report_students[report_grade] = \
    ...         [s for s in students if students.grade == report_grade]


Rationale -- Other designs considered
=====================================

All in one class
----------------

Some implementations have the enumeration and its values all as
attributes of a single object or class.

This PEP specifies a design where the enumeration is a container, and
the values are simple comparables.  It was felt that attempting to
place all the properties of enumeration within a single class
complicates the design without apparent benefit.


Metaclass for creating enumeration classes
------------------------------------------

The enumerations specified in this PEP are instances of an ``enum``
type.  Some alternative designs implement each enumeration as its own
class, and a metaclass to define common properties of all
enumerations.

One motivation for having a class (rather than an instance) for each
enumeration is to allow subclasses of enumerations, extending and
altering an existing enumeration.  A class, though, implies that
instances of that class will be created; it is difficult to imagine
what it means to have separate instances of a "days of the week"
class, where each instance contains all days.  This usually leads to
having each class follow the Singleton pattern, further complicating
the design.

In contrast, this PEP specifies enumerations that are not expected to
be extended or modified.  It is, of course, possible to create a new
enumeration from the string values of an existing one, or even
subclass the ``enum`` type if desired.


Values related to other types
-----------------------------

Some designs express a strong relationship to some other value, such
as a particular integer or string, for each enumerated value.

This results in using such values in contexts where the enumeration
has no meaning, and unnecessarily complicates the design.  The
enumerated values specified in this PEP export the values used to
create them, and can be compared for equality with any other value,
but sequence comparison with values outside the enumeration is
explicitly not implemented.


Hiding attributes of enumerated values
--------------------------------------

A previous design had the enumerated values hiding as much as possible
about their implementation, to the point of not exporting the string
key and sequence index.

The design in this PEP acknowledges that programs will often find it
convenient to know the enumerated value's enumeration type, sequence
index, and string key specified for the value.  These are exported by
the enumerated value as attributes.


Implementation
==============

This design is based partly on a recipe [#ENUM-RECIPE]_ from the
Python Cookbook.

The PyPI package ``enum`` [#ENUM-PACKAGE]_ provides a Python
implementation of the data types described in this PEP.


References and Footnotes
========================

..  [#CMP-NOTIMPLEMENTED]
    The ``NotImplemented`` return value from comparison operations
    signals the Python interpreter to attempt alternative comparisons
    or other fallbacks.
    <http://docs.python.org/ref/types.html#l2h-29>

..  [#ENUM-RECIPE]
    "First Class Enums in Python", Zoran Isailovski,
    Python Cookbook recipe 413486
    <http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/413486>

..  [#ENUM-PACKAGE]
    Python Package Index, package ``enum``
    <http://cheeseshop.python.org/pypi/enum/>


Copyright
=========

This document has been placed in the public domain.


..
   Local Variables:
   mode: indented-text
   indent-tabs-mode: nil
   sentence-end-double-space: t
   fill-column: 70
   End:


-- 
 \                         Contentsofsignaturemaysettleduringshipping. |
  `\                                                                   |
_o__)                                                                  |
Ben Finney


From hancock at anansispaceworks.com  Sun Feb  5 19:51:49 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Sun, 5 Feb 2006 18:51:49 -0600
Subject: Another try at Python's selfishness
In-Reply-To: <9nCT9LjkciB@jens-theisen.de>
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<GrGdnYYzsbcBLH_eRVn-iQ@comcast.com>
	<mailman.1372.1138945618.27775.python-list@python.org>
	<1138967950.697932.213160@g49g2000cwa.googlegroups.com>
	<9nCT9LjkciB@jens-theisen.de>
Message-ID: <20060205185149.5fa8d937@samwise.anansi>

On 04 Feb 2006 11:03:00 +0000
jth01 at arcor.de (Jens Theisen) wrote:
> n.estner wrote:
> > Yes, I 100% agree to that point!
> > But the point is, the current situation is not
> > newbie-friendly (I can tell, I am a newbie): I declare a
> > method with 3 parameters but when I call it I only pass
> > 2 parameters. That's confusing. If I declare a member
> > variable, I write: "self.x  = ValueForX", why can't I be
> > equally explicit for declaring member functions?
> 
> For someone new to OO in general it might as well be
> something good, so he   realises that there actually
> really is a hidden parameter. After all,   there is
> something to understand with "self", and this discrapency
> between   the number of arguments and parameters puts
> newbies to it.

Yes.  I have to say that I learned OOP at the same time as
Python (I made attempts with C++ that were moderately
successful, but beyond implementing new math objects, I
couldn't really see the benefit OOP then. I didn't "get"
it until I started using Python).

So, the idea of "the object itself is the first argument to
the function" made it implicitly clear to me what the heck
was this whole business about "methods".

I found the Python approach is very enlightening.

By contrast, Javascript seems positively obtuse. First, the
equivalent to "self" is a magically-appearing variable
called "this". But to make matters worse, this behavior is
repeated in many places -- you have to know when and where
magical variables like "this" and "prototype" appear, and
it's not at all obvious when reading other people's code.

(I suppose a formal introduction to Javascript would
explain these things -- but I note that many online "how to"
type documents skip them, partly because OOP is not very
popular with most casual Javascripters).

I tend to think of Javascript as "almost Python, but
stupidly designed", because of stuff like this.

My apologies to Javascript fans, I acknowledge that my
opinion is subjective. ;-)

Cheers,
Terry

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From lycka at carmen.se  Wed Feb  8 13:10:05 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 08 Feb 2006 19:10:05 +0100
Subject: Is Python good for web crawlers?
In-Reply-To: <mailman.1600.1139414756.27775.python-list@python.org>
References: <1139330008.270988.227170@g44g2000cwa.googlegroups.com>	<dscj3o$nll$1@wake.carmen.se>	<1hafknf.1ft17us1sux13rN%aleaxit@yahoo.com>
	<mailman.1600.1139414756.27775.python-list@python.org>
Message-ID: <dsdc5t$e6q$1@wake.carmen.se>

Simon Brunning wrote:
> On 2/8/06, Alex Martelli <aleaxit at yahoo.com> wrote:
> 
>>Bot? me? did I fail a Turing test again without even noticing?!
> 
> 
> If you'd noticed the test, you'd have passed.

No no, it's just a regular expression that notices the
word 'bot' close to 'Martelli'. Wouldn't surprise me
if more or less the same message appears again as a
response to this post. ;)


From haraldarminmassa at gmail.com  Mon Feb 27 03:57:52 2006
From: haraldarminmassa at gmail.com (Harald Armin  Massa)
Date: 27 Feb 2006 00:57:52 -0800
Subject: cx_Oracle and UTF8
In-Reply-To: <mailman.2347.1140703445.27775.python-list@python.org>
References: <1140628824.353213.278300@o13g2000cwo.googlegroups.com>
	<465kbtF9bvemU1@uni-berlin.de>
	<1140701445.217566.239200@z14g2000cwz.googlegroups.com>
	<mailman.2347.1140703445.27775.python-list@python.org>
Message-ID: <1141030672.715161.73500@v46g2000cwv.googlegroups.com>

Gerhard,

thanks, that

import os
os.environ["NLS_LANG"] = "German_Germany.UTF8"
import cx_Oracle
con = cx_Oracle.connect("me/secret at tns")

really helped. At least now the query returns something encoded
differently. I dared not to believe that there is no "direct encoding
change api" without touching the environment.

Now all that is left is to find out if Oracle indeed has the same
opinion what UTF8 should be like.

Thank you very much,

Harald



From steve at REMOVETHIScyber.com.au  Wed Feb 22 06:35:14 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Wed, 22 Feb 2006 22:35:14 +1100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com> <43fbc788@usenet01.boi.hp.com>
	<87u0ar3gba.fsf@wilson.homeunix.com>
Message-ID: <pan.2006.02.22.11.35.14.90948@REMOVETHIScyber.com.au>

On Wed, 22 Feb 2006 10:15:21 +0100, Torsten Bronger wrote:

>> And, as someone in this thread has pointed out, it is likely that
>> your important modern (x86) processor is not natively executing
>> your x86 code, and indeed meets your definition of having "in its
>> typical implementation an interpreting layer necessary for typical
>> hardware".
> 
> Only if you deliberately misunderstand me.

If the words you choose to use have implications which you failed to
realise before saying them, don't blame the reader for spotting those
implications.



>> Another example: is Java the bytecode, which is compiled from Java the
>> language, interpreted or not? Even when the HotSpot JIT cuts in?
> 
> It is partly interpreted and partly compiled.  That's why it's faster
> than Python.

But Python is partly interpreted and partly compiled too, so that can't be
the answer. 

I think we all know what the answer is. The Python interpreter isn't as
fast as the Java interpreter, or most machine code interpreters built into
hardware.

On the other hand, I'm pretty sure that interpreted Python runs faster on
my current PC than compiled code runs on the 20 year old Macintosh in my
cupboard. So "compiled" isn't a magic wand that makes code run faster.



>> [...]
>>
>> Personally, in practice I don't care, so don't ask me. Ponder on
>> getting angels to dance on the head of a pin before you worry about
>> whether the dance can be interpreted or not.
> 
> I agree that the term "interpreted" is bad Python advocacy because its
> implications are often misunderstood.  However, I think that it's fair
> to make a distiction between compiled and interpreted languages because
> it may affect one's decision for one or the other. Although I'm surely
> not ingenious, I can make this distinction.

Would you rather use a blindingly fast interpreted language, or a
slow-as-continental drift compiled one?

This isn't a rhetorical question. In the mid-80s, Apple and Texas
Instruments collaborated on a Macintosh II computer with a Lisp
coprocessor. The problem was, according to benchmarks at the time, Lisp
compiled and run natively on the coprocessor was actually slower than Lisp
interpreted on a standard Macintosh II.

I'm sure that's hardly the only example of a speedy interpreted language
beating a glacial compiled one.


> The reason why Python is slower than C is because there is an
> interpreting layer that C doesn't have.

The primary reason Python is slower than C is because C compilers have
been optimized to create fast code, while Python has been created to
optimize programmer productivity instead. That means that a simple
instruction like x + y does a lot more work in Python than it does in C.

There are other languages that, like Python, are dynamic, interpreted,
interactive and the rest, and they execute faster than Python. (By the
same token, there are also some that execute slower than Python.) Let's be
honest here: it isn't that Python can't be as fast as C, it is that the
Python Dev team have had other priorities.

But over time, as PyPy, Psycho, and other technologies bear fruit, Python
will speed up, even though it will remain interpreted. 


> And the reason for this is that
> Python's nature is incompatible with today's CPUs (which was a
> deliberate and advantageous design decision).  I'm sure that a willing
> CS person could define this more clearly.
> 
> Anyway, if we drop "scripting" and drop "interpreted", what do you want
> to tell people asking why Python is so slow?  Because it is dynamic? ;-)

Who says Python is so slow? I've just got Python to count from 0 up to
100,000, and it only took 7 milliseconds. That's at least 12 milliseconds
faster than I can count on my fingers.

But seriously... why not tell them the truth? Python is slower than some
other languages because optimization for execution speed has not been the
primary focus of Python's development. If you tell them that Python is
slow because it is interpreted, they will believe that Python will always
be slow. If you tell them that Python is slow because speed has not been
the priority, they will believe that some day it will become the priority,
and then Python will get faster. And they will be right. That is the aim
of PyPy after all.




-- 
Steven.



From deets at nospam.web.de  Sun Feb 26 15:58:30 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 26 Feb 2006 21:58:30 +0100
Subject: How can I find the remainder when dividing 2 integers
In-Reply-To: <1140987212.515152.46050@v46g2000cwv.googlegroups.com>
References: <1140984473.723258.70050@e56g2000cwe.googlegroups.com>
	<46egiuFanujjU2@uni-berlin.de>
	<1140985687.324979.153730@e56g2000cwe.googlegroups.com>
	<46ehr1FarmcsU1@uni-berlin.de>
	<1140987212.515152.46050@v46g2000cwv.googlegroups.com>
Message-ID: <46ej3nFa6ptvU1@uni-berlin.de>

silverburgh.meryl at gmail.com schrieb:
> Can you please tell me what is the meaning of
>  UnboundLocalError: local variable 'colorIndex' referenced before
> assignment 
> 
> in general?

Well, pretty much of what it says: You tried to access a variable without prior assignment to it. Like this:


a = b**2 + c**2

Won't work. But if you do

b = 2
c = 3
a = b**2 + c**2

it works. I suggest you read a python tutorial - plenty of the out there, google is as always your friend.

Diez



From bonono at gmail.com  Sun Feb 12 09:20:10 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 12 Feb 2006 06:20:10 -0800
Subject: Is python very slow compared to C
In-Reply-To: <pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
Message-ID: <1139754010.067582.214830@z14g2000cwz.googlegroups.com>


Steven D'Aprano wrote:
> But, in general, more often than not, Python is fast enough. The extra
> value of using something like Lua or Ocaml or even C is just not enough to
> make up for the disadvantages of using those languages.
>
What is the disavantage of Lua comparing with Python ? Or Ocaml
comparing with Python ?



From __peter__ at web.de  Mon Feb 20 04:28:56 2006
From: __peter__ at web.de (Peter Otten)
Date: Mon, 20 Feb 2006 10:28:56 +0100
Subject: Quesion about the proper use of __slots__
References: <1140424508.393412.79140@o13g2000cwo.googlegroups.com>
	<43f9825e$0$4777$636a55ce@news.free.fr>
	<1140426860.033363.237150@o13g2000cwo.googlegroups.com>
Message-ID: <dtc219$h0a$01$1@news.t-online.com>

Zefria wrote:

> Also, I don't generally do any optimization at all yet (as a highschool
> student projects get trashed often enough no to bother over), but in
> this special case I'm expecting each "carrier" to have up to 150
> fighters, and 3 to 5 carriers for each of the two teams, which comes
> out to be quite large.

However, 'large numbers' are more likely to start (picture me looking out of
the window) at 100,000 than 10,000 in this context -- and you are at 750...

Peter



From webraviteja at gmail.com  Tue Feb 21 04:41:43 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 21 Feb 2006 01:41:43 -0800
Subject: Little tool - but very big size... :-(
In-Reply-To: <mailman.2211.1140513270.27775.python-list@python.org>
References: <mailman.2211.1140513270.27775.python-list@python.org>
Message-ID: <1140514903.581331.138850@g43g2000cwa.googlegroups.com>

Dependency tracking is usually not perfect in exe generators. I don't
recall how good py2exe is at this. If you understand which of those
files will not be used by your program, you can safely delete them. A
bit of trial and error here if you are not sure. Unless you are using
floppies or dialup to transfer this tool, you should simply not worry
about the file size.

As for compression, just use an installer builder like Inno Setup
http://www.jrsoftware.org/isinfo.php
http://www.istool.org/default.aspx/



From me at privacy.net  Mon Feb  6 09:39:32 2006
From: me at privacy.net (Dan Sommers)
Date: Mon, 06 Feb 2006 09:39:32 -0500
Subject: Question about idioms for clearing a list
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au>
Message-ID: <m2vevswnyz.fsf@unique.fqdn>

On Tue, 07 Feb 2006 01:01:43 +1100,
Steven D'Aprano <steve at REMOVETHIScyber.com.au> wrote:

> On Mon, 06 Feb 2006 13:35:10 +0000, Steve Holden wrote:
>>> I'm wondering why there is no 'clear' for lists. It feels like a common
>>> operation for mutable containers. :-/
>>> 
>> Because it's just as easy to create and assign a new empty list (and 
>> have the old unused one garbage collected).
>> 
>> l = []
>> 
>> is all you need!

> Not so. If that logic were correct, then dicts wouldn't need a clear
> method either, because you could just assign a new empty dict with d = {}.

> But your own sentence tells us why this is not sufficient: because you
> aren't emptying the list, you are reassigning (rebinding) the name. The
> old list still exists, and there is no guarantee that it will be garbage
> collected, because there is no guarantee that it isn't in use somewhere
> else:

> L = [0,1,2]
> D = {"key": L}
> L = []  # rebinds the name L, but the list instance still exists

That is a red herring.  Consider this:

L = [object(), object()]
O = L[1]
L = [] # or insert your favorite list-clearing/emptying statement here

What damage is done now that O is still referring to one of the items
that used to be in L?

The trouble begins when references to "the list to which L refers" end
up somewhere else.  Then we have to wonder if rebinding L will leave
some other block of code with an outdated list.

Regards,
Dan

-- 
Dan Sommers
<http://www.tombstonezero.net/dan/>


From bearophileHUGS at lycos.com  Mon Feb 27 07:44:25 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 27 Feb 2006 04:44:25 -0800
Subject: how do I factor a number down to one digit?
In-Reply-To: <pan.2006.02.27.11.18.11.778580@REMOVETHIScyber.com.au>
References: <1141036302.641818.72570@i39g2000cwa.googlegroups.com>
	<pan.2006.02.27.11.18.11.778580@REMOVETHIScyber.com.au>
Message-ID: <1141044265.879901.198560@z34g2000cwc.googlegroups.com>

>Sounds like homework to me.

Sorry Steven, you may be right, next time I'll be more careful.

Bye,
bearophile



From mark at mark-fink.de  Tue Feb 21 17:03:07 2006
From: mark at mark-fink.de (Mark Fink)
Date: 21 Feb 2006 14:03:07 -0800
Subject: jython socket sendall
In-Reply-To: <1140250135.240867.316540@g44g2000cwa.googlegroups.com>
References: <1140250135.240867.316540@g44g2000cwa.googlegroups.com>
Message-ID: <1140556495.665927.171080@g47g2000cwa.googlegroups.com>

I used send instead. This should work.
-Mark



From johnjsal at NOSPAMgmail.com  Mon Feb 13 11:12:27 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 13 Feb 2006 16:12:27 GMT
Subject: how do you pronounce 'tuple'?
In-Reply-To: <mailman.1834.1139846105.27775.python-list@python.org>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>	<Gg1If.1600$No6.38157@news.tufts.edu>
	<mailman.1834.1139846105.27775.python-list@python.org>
Message-ID: <Ld2If.1602$No6.38080@news.tufts.edu>

Steve Holden wrote:

> No, no, no. The correct pronunciation is "tyoople" (or, if you're being 
> lazy, "choople"). Anything else is wrong, but we English are usually 
> prepared to forgive foreigners their ignorance :-)
> 
> [If I pronounced as badly as I type nobody would ever know what I was 
> saying].
> 
> not-that-we're-arrogant-or-anything-ly y'rs  - steve

::eyes the Brits suspiciously::

And I thought there were only choo ways to pronounce it...turns out 
there are free.


From aleaxit at yahoo.com  Wed Feb  8 10:47:41 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Wed, 8 Feb 2006 07:47:41 -0800
Subject: Undergraduate project :: python ToDo list
References: <mailman.1597.1139410854.27775.python-list@python.org>
Message-ID: <1hafk9i.1e804011ofjv0rN%aleaxit@yahoo.com>

Joao Macaiba <joao.macaiba at gmail.com> wrote:

> Hi.
> 
> I would like to know if there's any todo list on python project.
> 
> My interest in doing a undergraduate project.
> 
> It could be anything in the python core interpreter. I program C/C++.

The PEP index shows several PEPs approved but not implemented for Python
2.5; take a look and write the development mailing list,
python-dev at python.org, to volunteer to implement one of them.


Alex


From Allerdyce.John at gmail.com  Sun Feb 26 14:34:26 2006
From: Allerdyce.John at gmail.com (Allerdyce.John at gmail.com)
Date: 26 Feb 2006 11:34:26 -0800
Subject: How to use python regular expression to substitute string value
In-Reply-To: <1140980529.969474.15430@t39g2000cwt.googlegroups.com>
References: <1140978932.892295.322370@z34g2000cwc.googlegroups.com>
	<1140980529.969474.15430@t39g2000cwt.googlegroups.com>
Message-ID: <1140982466.472084.150780@t39g2000cwt.googlegroups.com>

okay, but I have a simpler question, how can I split using only "\n"?

I try this:
            strings = node.data.split("\n");
             print node.data

             for str in strings:
                 print str

where node.data has multiple lines, but in the for loop, I don't see
str gets print out.



From julianlzb87 at gmail.com  Tue Feb 28 16:16:11 2006
From: julianlzb87 at gmail.com (julianlzb87 at gmail.com)
Date: 28 Feb 2006 13:16:11 -0800
Subject: OT The Art
Message-ID: <1141161371.125017.278750@j33g2000cwa.googlegroups.com>

Illuminated manuscripts, 13 volumes

http://ptlslzb87.blogspot.com/



From peter at engcorp.com  Mon Feb 20 16:14:37 2006
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 20 Feb 2006 16:14:37 -0500
Subject: Quesion about the proper use of __slots__
In-Reply-To: <1hb1vq2.1ij7f8e1bx24u8N%aleaxit@yahoo.com>
References: <1140424508.393412.79140@o13g2000cwo.googlegroups.com>	<43f9825e$0$4777$636a55ce@news.free.fr>	<1140426860.033363.237150@o13g2000cwo.googlegroups.com>
	<1hb1vq2.1ij7f8e1bx24u8N%aleaxit@yahoo.com>
Message-ID: <dtdbft$5ie$1@sea.gmane.org>

Alex Martelli wrote:
> Zefria <zefria at gmail.com> wrote:
>    ...
>>this special case I'm expecting each "carrier" to have up to 150
>>fighters, and 3 to 5 carriers for each of the two teams, which comes
>>out to be quite large.
> 
> The problem with the spread of email is that it reduces the number of
> envelopes laying around, and thus makes it harder to do "back of the
> envelopes" calculations (the key skill in engineering...).

Actually, a properly performed "engineering approximation" is done 
entirely in one's head, preferably without resorting to calculation at 
all.

The "back of the envelope" ploy is reserved for cases where one is 
trying to impress a waitress (which effort is inevitably doomed to fail 
of course), or to make it easier to submit the dinner receipt as a 
business expense...

;-)
-Peter



From mike.klaas at gmail.com  Tue Feb 28 19:44:26 2006
From: mike.klaas at gmail.com (Klaas)
Date: 28 Feb 2006 16:44:26 -0800
Subject: bsddb3 database file,
	are there any unexpected file size limits occuring in practice?
In-Reply-To: <du1aq0$mv0$1@newsreader3.netcologne.de>
References: <dtj9gc$b33$1@newsreader3.netcologne.de>
	<1140670193.599122.325800@z34g2000cwc.googlegroups.com>
	<dtk1u6$118$1@newsreader3.netcologne.de>
	<1141077930.320242.97990@v46g2000cwv.googlegroups.com>
	<du1aq0$mv0$1@newsreader3.netcologne.de>
Message-ID: <1141173866.916305.202910@v46g2000cwv.googlegroups.com>

> In my current project I expect the total size of the indexes to exceed
> by far the size of the data indexed, but because Berkeley does not
> support multiple indexed columns (i.e. only one key value column as
> index) if I access the database files one after another (not
> simultaneously) it should work without problems with RAM, right?

You can maintain multiple secondary indices on a primary database.  BDB
isn't a "relational" database, though, so speaking of columns confuses
the issue.  But you can have one database with primary key -> value,
then multiple secondary key -> primary key databases (with bdb
transparently providing the secondary key -> value mapping if you
desire).

> Do the data volume required to store the key values have impact on the
> size of the index pages or does the size of the index pages depend only
> on the number of records and kind of the index (btree, hash)?

For btree, it is the size of the keys that matters.  I presume the same
is true for the hashtable, but I'm not certain.

> What is the upper limit of number of records in practice?

Depends on sizes of the keys and values, page size, cache size, and
physical limitations of your machine.

-Mike



From huyslogic at gmail.com  Wed Feb  8 10:46:45 2006
From: huyslogic at gmail.com (Huy)
Date: 8 Feb 2006 07:46:45 -0800
Subject: PyGTK
Message-ID: <1139413605.029688.130040@f14g2000cwb.googlegroups.com>

Hi, I'm new to Python, and GUI development, but am no novice to backend
programming.  Aside from mastering the standard language, I will
eventually be developing applications dealing with images and controls.
 Thus forth I have been testing out PyGTK & it appears to be quite
robust (that and I like the fact of cross-platform compatibility).

What I am curious to know is whether anyone has come across any
noteworthy gui development platforms.  Cross compatibility is not a
must, but a bonus.  Good documentation and clarity is essential for me.
 Also, I imagine I can use modules for image manipulation in tandem
with the GUI interface?  Any comments or speculations are looked
forward to.  Just thought I'd see if there's anything out there the
community knows I may not be currently aware of.



From larry.bates at websafe.com  Thu Feb 23 15:30:22 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Thu, 23 Feb 2006 14:30:22 -0600
Subject: spaces at ends of filenames or directory names on Win32
In-Reply-To: <dtkuav$keb$1@solaris.cc.vt.edu>
References: <dtkuav$keb$1@solaris.cc.vt.edu>
Message-ID: <43FE1B5E.8060009@websafe.com>

rtilley wrote:
> # Spaces are present before and after the XXX
> filename = ' XXX '
> 
> new_filename = filename.strip()
> 
> if new_filename != filename:
>     print filename
> 
> Macs allow these spaces in file and folder names. Which is OK. The
> problem arises when the file or folder is copied to a PC running Windows
> from a Mac. Windows allows the Mac to copy the file to it, but when
> Windows itself attempts to do anything with the file it strips the
> spaces and then tries to move it, copy it, etc and complains that the
> file isn't there!
> 
> I can rectify this by striping the spaces from the files and folders on
> the Mac before they are copied to the PC or mounting the Windows share
> from the Mac and running a recursive strip program I wrote, but Windows
> will not allow the whitespace removal directly from within Windows....
> how annoying!
> 
> For example... tell windows to move a file named ' XXX ' (one space
> before and one space after the filename). Windows will complain that
> file 'XXX' does not exist. It's correct of course, 'XXX' does not exist,
> but ' XXX ' does indeed exist.
> 
> Can anyone rescue me from this madness :(
> 
> Many Thanks,
> Brad

How about not naming files with leading and trailing spaces on
the Mac?  Seems like a bad habit that needs breaking ;-).

-Larry Bates


From dbasch at yahoo.com  Tue Feb 28 17:28:36 2006
From: dbasch at yahoo.com (Derek Basch)
Date: 28 Feb 2006 14:28:36 -0800
Subject: Rounding up to the nearest exact logarithmic decade
Message-ID: <1141165716.023456.318240@u72g2000cwu.googlegroups.com>

Given a value (x) that is within the range (1e-1, 1e7) how do I round
(x) up to the closest exact logarithmic decade? For instance:

10**3 = 1000
x = 4978
10**4 = 10000

x = 10000

Thanks Everyone!
Derek Basch



From cfbolz at gmx.de  Thu Feb  9 17:02:58 2006
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Thu, 09 Feb 2006 23:02:58 +0100
Subject: jump into the interpreter in a script
In-Reply-To: <43EA7A62.2090904@bryant.edu>
References: <43EA7A62.2090904@bryant.edu>
Message-ID: <dsge6i$u76$1@sea.gmane.org>

Brian Blais wrote:
> I was wondering if there is a way to, within a script, jump into the interpreter.
> What I mean is something like the "keyboard" command in Matlab, where the script
> pauses and you get an interpreter prompt, where you can look at variables, change
> their values, etc.  then when you exit the interpreter, the script continues from
> where it left off.  Is this possible in python?

Yes. The "code" module of the stdlib is what you want. put

import code
code.interact(local=locals())

into a point where you would like to have an interpreter prompt.

Cheers,

Carl Friedricch



From mark at mark-fink.de  Fri Feb 10 14:45:59 2006
From: mark at mark-fink.de (Mark Fink)
Date: 10 Feb 2006 11:45:59 -0800
Subject: Jython inherit from Java class
In-Reply-To: <1139594138.216488.12730@g14g2000cwa.googlegroups.com>
References: <1139344211.725580.263660@g47g2000cwa.googlegroups.com>
	<43eab05b_2@newspeer2.tds.net>
	<1139594138.216488.12730@g14g2000cwa.googlegroups.com>
Message-ID: <1139600759.152551.138440@g14g2000cwa.googlegroups.com>

I observed something strange when I tried to compile the jython class:
D:\AUT_TEST\workspace\JyFIT\fit>jythonc JyFitServer.py
processing JyFitServer

Required packages:
  fitnesse.util
  java.io
  java.net
  fitnesse.components*

Creating adapters:

Creating .java files:
  JyFitServer module
    JyFitServer extends fit.FitServer

Compiling .java to .class...
Compiling with args: ['C:\\Programme\\Java\\jdk1.5.0_06\\bin\\javac',
'-classpath',
'D:/AUT_TEST/JyFIT_port/fit;D:\\AUT_TEST\\Jython21\\jython.jar;C:\\Programme\\Java\\jdk1.5.0_06\\lib\\tools.jar;C:\\
Java\\jboss-4.0.0\\server\\default\\lib\\mysql-connector-java-2.0.14-bin.jar;C:\\Java\\jboss-4.0.0\\client\\jboss-j2ee.jar;C:\\Java\\jboss-4.0.0\\client\\jboss-client.jar;C:\\Java\\jboss-4.0.0\\client
\\jbosssx-client.jar;C:\\Java\\jboss-4.0.0\\client\\jnp-client.jar;C:\\Java\\jboss-4.0.0\\client\\jnet.jar;C:\\Java\\jboss-4.0.0\\client\\jboss-common-client.jar;C:\\Java\\jboss-4.0.0\\tomcat-4.1.x\\c
ommon\\lib\\servlet.jar;D:\\AUT_TEST\\Jython21\\jython.jar;D:\\AUT_TEST\\fitnesse\\fitnesse.jar;D:\\AUT_TEST\\JyFIT_port;%CLASSPATH%;.\\jpywork;;D:\\AUT_TEST\\Jython21\\Tools\\jythonc;D:\\AUT_TEST\\wo
rkspace\\JyFIT\\fit\\.;D:\\AUT_TEST\\Jython21\\Lib;D:\\AUT_TEST\\workspace\\JyFIT;D:\\AUT_TEST\\fitnesse\\fitnesse.jar;D:\\AUT_TEST\\Jython21',
'.\\jpywork\\JyFitServer.java']
1  D:\AUT_TEST\Jython21\org\python\core\Py.java:989: as of release 1.4,
'assert' is a keyword, and may not be used as an identifier
(try -source 1.3 or lower to use 'assert' as an identifier)
    public static void assert(PyObject test, PyObject message) {
                       ^
D:\AUT_TEST\Jython21\org\python\core\Py.java:995: as of release 1.4,
'assert' is a keyword, and may not be used as an identifier
(try -source 1.3 or lower to use 'assert' as an identifier)
    public static void assert(PyObject test) {
                       ^
D:\AUT_TEST\Jython21\org\python\core\Py.java:996: ')' expected
        assert(test, Py.None);
                   ^
D:\AUT_TEST\Jython21\org\python\parser\PythonGrammar.java:6739: as of
release 1.5, 'enum' is a keyword, and may not be used as an identifier
(try -source 1.4 or lower to use 'enum' as an identifier)
      for (java.util.Enumeration enum = jj_expentries.elements();
enum.hasMoreElements();) {
                                 ^
D:\AUT_TEST\Jython21\org\python\parser\PythonGrammar.java:6739: as of
release 1.5, 'enum' is a keyword, and may not be used as an identifier
(try -source 1.4 or lower to use 'enum' as an identifier)
      for (java.util.Enumeration enum = jj_expentries.elements();
enum.hasMoreElements();) {
                                                                  ^
D:\AUT_TEST\Jython21\org\python\parser\PythonGrammar.java:6740: as of
release 1.5, 'enum' is a keyword, and may not be used as an identifier
(try -source 1.4 or lower to use 'enum' as an identifier)
        int[] oldentry = (int[])(enum.nextElement());
                                 ^
D:\AUT_TEST\Jython21\org\python\core\Py.java:996: incompatible types
found   : org.python.core.PyObject
required: boolean
        assert(test, Py.None);
               ^
D:\AUT_TEST\Jython21\org\python\core\PyBeanProperty.java:36: warning:
non-varargs call of varargs method with inexact argument type for last
parameter;
cast to java.lang.Object for a varargs call
cast to java.lang.Object[] for a non-varargs call and to suppress this
warning
            Object value = getMethod.invoke(iself, Py.EmptyObjects);
                                                     ^
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
7 errors
1 warning

ERROR DURING JAVA COMPILATION... EXITING

D:\AUT_TEST\workspace\JyFIT\fit>
Looks like something in the Jython core causes the problem
(org\python\core\Py.java) any Ideas what I can do?



From godoy at ieee.org  Thu Feb  2 16:54:07 2006
From: godoy at ieee.org (Jorge Godoy)
Date: Thu, 02 Feb 2006 19:54:07 -0200
Subject: Windows - create text file - (newb)
References: <1138916451.293717.283320@g44g2000cwa.googlegroups.com>
Message-ID: <87hd7hctq8.fsf@ieee.org>

"Ernesto" <erniedude at gmail.com> writes:

> Can Python be used to create (and/or open, read, and write) a text file
> in Windows (if the path is known) ?

Yes.

-- 
Jorge Godoy      <godoy at ieee.org>

"Quidquid latine dictum sit, altum sonatur."
- Qualquer coisa dita em latim soa profundo.
- Anything said in Latin sounds smart.


From Matt  Sun Feb 19 22:32:27 2006
From: Matt (Matt)
Date: Mon, 20 Feb 2006 03:32:27 GMT
Subject: Komodo - Will it Lock Me In?
Message-ID: <yEncExpress_Rulz!_www.techsono.com_3223251148@firstva.com>

"Peter Decker" <pydecker at gmail.com> wrote:

>You should take a look at Dabo, 

Yes, I have Dabo installed on my system. I made a small test app, but was 
unable to deploy it. I was getting an error from py2exe, I think, about how my 
wxPython installation was not correct. This is the kind of thing I am talking 
about. If Dabo were an integrated system, I wouldn't have to spend many days 
struggling to install package after package and then get them all to play nice 
with each other.

Having said that, I will continue to struggle and like Dabo as the best option 
so far.

Thanks,
Matt





From spam4bsimons at yahoo.ca  Mon Feb  6 07:36:43 2006
From: spam4bsimons at yahoo.ca (Brendan)
Date: 6 Feb 2006 04:36:43 -0800
Subject: Scientific Computing with NumPy
In-Reply-To: <ds7ch4$bj7$1@gemini.csx.cam.ac.uk>
References: <ds7bvh$ab1$2@gemini.csx.cam.ac.uk>
	<mailman.1482.1139225595.27775.python-list@python.org>
	<ds7ch4$bj7$1@gemini.csx.cam.ac.uk>
Message-ID: <1139229403.024321.215780@o13g2000cwo.googlegroups.com>

As of version 0.4.x, Scipy exclusively uses the newer NumPy module
instead of the older Numeric module.  The confusion is inevitable in
this time of transition, but their intent is to standardize on one
array package.

Brendan
--
Brendan Simons



mclaugb wrote:
> This page documents the differences.  It seems that NumPy is supported and
> more recent.
> http://numeric.scipy.org/
>
>
> "linda.s" <samrobertsmith at gmail.com> wrote in message
> news:mailman.1482.1139225595.27775.python-list at python.org...
> On 2/6/06, mclaugb <mclaugb at nospm.yahoo.com> wrote:
> > Has anyone recompiled the Scientific Computing package using NumPy instead
> > of Numeric?
> > I need a least squares algorithm and a Newton Rhaphson algorithm which is
> > contained in Numeric but all the documentation out there says that Numeric
> > is crap and all code should be using NumPy.
> > Thanks,
> > Bryan
> what is the relationship between Numeric and Numpy?



From michaeltaft at gmail.com  Sun Feb 12 15:01:29 2006
From: michaeltaft at gmail.com (mwt)
Date: 12 Feb 2006 12:01:29 -0800
Subject: Downloading Large Files -- Feedback?
Message-ID: <1139773494.245577.102870@g47g2000cwa.googlegroups.com>

This code works fine to download files from the web and write them to
the local drive:

import urllib
f =  urllib.urlopen("http://www.python.org/blah/blah.zip")
g = f.read()
file = open("blah.zip", "wb")
file.write(g)
file.close()

The process is pretty opaque, however. This downloads and writes the
file with no feedback whatsoever. You don't see how many bytes you've
downloaded already, etc. Especially the "g = f.read()" step just sits
there while downloading a large file, presenting a pregnant, blinking
cursor.

So my question is, what is a good way to go about coding this kind of
basic feedback? Also, since my testing has only *worked* with this
code, I'm curious if it will throw a visibile error if something goes
wrong with the download.

Thanks for any pointers. I'm busily Googling away.



From wanghz at gmail.com  Sun Feb 12 11:15:50 2006
From: wanghz at gmail.com (wanghz at gmail.com)
Date: 12 Feb 2006 08:15:50 -0800
Subject: Can I get the 8bit-string representation of any unicode string
In-Reply-To: <mailman.1783.1139759324.27775.python-list@python.org>
References: <1139757073.364694.176200@g14g2000cwa.googlegroups.com>
	<mailman.1783.1139759324.27775.python-list@python.org>
Message-ID: <1139760950.777963.245250@g47g2000cwa.googlegroups.com>

Thank you all for your replies :-)

I may misunderstood it.  I will think about it carefully.

By the way, does python has a interface, just like iconv in libc for
C/C++?  Or, how can I convert a string from a encoding into another
one?


Thank you so much.



From userprogoogle-139 at yahoo.co.uk  Mon Feb  6 07:52:41 2006
From: userprogoogle-139 at yahoo.co.uk (rodmc)
Date: 6 Feb 2006 04:52:41 -0800
Subject: Python and Flash
Message-ID: <1139230361.675896.241920@z14g2000cwz.googlegroups.com>

Can anyone provide me with advice on how easy (or otherwise) it is to
drive a Flash animation (stored locally but displaed in a browser) with
a Python application. Basically information is getting streamed to a
Python client and this is expected to update the Flash animation.

It sounds odd, but it has to be done.

Thanks,

Rod



From cfbolz at gmx.de  Tue Feb 21 19:57:13 2006
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Wed, 22 Feb 2006 01:57:13 +0100
Subject: Python vs. Lisp -- please explain
In-Reply-To: <4866bea60602210948x10bff91elbff376bc8ec116f8@mail.gmail.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>	<87bqx3glb1.fsf@wilson.homeunix.com>	<43f984dc$0$27151$626a54ce@news.free.fr>	<873bienwlx.fsf@wilson.homeunix.com>	<mailman.2160.1140440898.27775.python-list@python.org>	<1140454473.335788@jetspin.drizzle.com>	<pan.2006.02.20.21.59.12.636908@REMOVETHIScyber.com.au>	<1140490302.639049@jetspin.drizzle.com>	<mailman.2231.1140532613.27775.python-list@python.org>	<1140539404.440390.172350@g44g2000cwa.googlegroups.com>
	<4866bea60602210948x10bff91elbff376bc8ec116f8@mail.gmail.com>
Message-ID: <dtgcta$c9i$1@sea.gmane.org>

Chris Mellon wrote:
[snip]
> I don't think it does, though. Firstly, as a definition it relies on
> the environment the application will be running under and therefore
> can't be considered to describe just a language. Secondly, by that
> definition Java is an interpreted language which is at odds with the
> common definition.
> 
> I've encountered a C scripting environment that works by using GCC to
> compile each line as it is encountered, doing some magic to keep a
> working compilation environment around.
> 
> Interpreted? Compiled?
>

There is also the wonderful C interpreter cint:

http://root.cern.ch/root/Cint.html

so obviously C must be an interpreted language :-)

Cheers,

Carl Friedrich Bolz



From ajones1 at gmail.com  Fri Feb 24 12:19:40 2006
From: ajones1 at gmail.com (ajones)
Date: 24 Feb 2006 09:19:40 -0800
Subject: remote module importing (urlimport)
In-Reply-To: <mailman.2383.1140740895.27775.python-list@python.org>
References: <43FE4A94.8010709@codeshift.net>
	<mailman.2383.1140740895.27775.python-list@python.org>
Message-ID: <1140801580.835062.90370@u72g2000cwu.googlegroups.com>

What plans do you have for security in this? I would think that in
order to trust this over the network you would at least need a
certificate identifying the server as well as some method of verifying
package contents.

Either way, cool stuff.



From n.estner at gmx.de  Fri Feb  3 11:58:56 2006
From: n.estner at gmx.de (n.estner at gmx.de)
Date: 3 Feb 2006 08:58:56 -0800
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<drvd56$nb3$1@wake.carmen.se>
	<1138967463.440194.184710@g49g2000cwa.googlegroups.com>
	<pan.2006.02.03.12.32.47.209717@REMOVETHIScyber.com.au>
	<1ha6a71.10mos5m9evcy8N%aleaxit@yahoo.com>
Message-ID: <1138985936.846079.233540@g14g2000cwa.googlegroups.com>

> ...
> Unfortunately, none of this suggests that it's reasonable to have
>
> def x.y(z): ...
>
> mean the same as
>
> def y(x, z): ...

Actually, it shouldn't. The idea was, that
    def x.y(z): ...
(explicitly) introduces an unbound method. That's not introducing a new
conect to python, it's just making the difference between an unbound
method and a not-bindable function explicit.

Currently, "def(x,y): ..." can mean two different things: In the
context of a class, it introduces an unbound method, in global or local
contexts it introduces a function. I don't want to have a new syntax
for that, I want two different syntaxes for these two different
meanings.

> and I have no idea of how it would generalize to def x.y.z(t): ...

Nor do I. Is that a problem?



From fredrik at pythonware.com  Mon Feb  6 14:25:20 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 6 Feb 2006 20:25:20 +0100
Subject: Best way to capture output of another command-line program in
	Win32?
References: <qu7fu19vuoddfcn2fu3t23mfqg6536t6qn@4ax.com>
Message-ID: <ds87r0$qkr$1@sea.gmane.org>

Peter A.Schott wrote:

> Not sure what I should do here.  I know that DOS/CMD can capture the output of
> EXE files in Win32.  I know that os.popen() has been recommended for this, but
> the couple of times I've tried, it didn't seem to work well.  I haven't had a
> lot of need to do this recently, but we're trying to automate some processes
> right now that require us to trap the output of a command line and react
> accordingly.
>
> Any suggestions on the best method for trapping this output?

import subprocess

(see the library reference for details.  if that doesn't work well, please post
a description of the problem, including tracebacks, test code, etc.)

</F> 





From steve at holdenweb.com  Wed Feb 15 23:08:21 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 15 Feb 2006 23:08:21 -0500
Subject: Which is faster? (if not b in m) or (if m.count(b) > 0)
In-Reply-To: <43F3E7F0.1070406@REMOVEMEcyber.com.au>
References: <1139976842.179801.285400@z14g2000cwz.googlegroups.com>	<pan.2006.02.15.07.44.08.876338@gmx.net>	<pan.2006.02.15.12.14.46.964790@REMOVETHIScyber.com.au>	<45h1huF6hks7U1@individual.net>
	<43F3E7F0.1070406@REMOVEMEcyber.com.au>
Message-ID: <43F3FAB5.90901@holdenweb.com>

Steven D'Aprano wrote:
[...]
(On the other hand, lousy testing is practically worthless.)

+1 QOTW
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From martin.witte at gmail.com  Fri Feb 17 10:02:51 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 17 Feb 2006 07:02:51 -0800
Subject: RSA in python
In-Reply-To: <mailman.2057.1140187795.27775.python-list@python.org>
References: <mailman.2057.1140187795.27775.python-list@python.org>
Message-ID: <1140188570.989585.208760@o13g2000cwo.googlegroups.com>

Did you try this: http://www.amk.ca/python/code/crypto ?



From donn at u.washington.edu  Mon Feb 13 17:11:57 2006
From: donn at u.washington.edu (Donn Cave)
Date: Mon, 13 Feb 2006 14:11:57 -0800
Subject: how do you pronounce 'tuple'?
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<mailman.1806.1139805039.27775.python-list@python.org>
	<0mt1v15ei7tg1mr0oclo703b6c92jr9vb4@4ax.com>
Message-ID: <donn-C51AF6.14115713022006@gnus01.u.washington.edu>

In article <0mt1v15ei7tg1mr0oclo703b6c92jr9vb4 at 4ax.com>,
 Dave Hansen <iddw at hotmail.com> wrote:

> I've seen "route" pronounced "rout" or "root" depending on the
> background and mood of the speaker, though in this part of the country
> ("midwest", though "middle" might be more accurate) the former
> pronunciation is far more common.  Through the sugestive power of
> television, however, I suspect nearly every American would speak of
> "root 66" even though the next sentence might reference "rout 12."
> 
> On NPR ([American] National Public Radio), there's a weekly music
> program called "American Routes" pronounced such to conjure the
> alternate "American Roots."

Those of us for whom 'root' rhymes with 'foot', can pronounce
'route' either way without ambiguity.  Or we could, anyway, if
everyone else would get with it.  If you're going to adopt this
sensible program, other short vowel words are roof, hoof, creek.
My grandfather pronounced hoop short, but I never heard anyone
else do likewise.  Tuple rhymes with couple.

   Donn Cave, donn at u.washington.edu


From bblais at bryant.edu  Thu Feb 23 14:05:36 2006
From: bblais at bryant.edu (Brian Blais)
Date: Thu, 23 Feb 2006 14:05:36 -0500
Subject: execfile error exception line number?
Message-ID: <43FE0780.3050709@bryant.edu>

Hello,

I'd like to do the following:

import sys
try:
	execfile("somefile.py")
except:
	s=sys.exc_info()
	print "Error '%s' happened on line %d" % (s[1],s[2].tb_lineno)


(I'm going to replace the print later with a gui dialog)

how can I get the line number in "somefile.py" where the error occurs?  When I do the 
above, I get the line number in the script which calls execfile instead.


		thanks,


			Brian Blais

-- 
-----------------

             bblais at bryant.edu
             http://web.bryant.edu/~bblais


From mhellwig at xs4all.nl  Thu Feb 16 18:43:15 2006
From: mhellwig at xs4all.nl (Martin P. Hellwig)
Date: Fri, 17 Feb 2006 00:43:15 +0100
Subject: Question about xmlrpc and threading
In-Reply-To: <mailman.1978.1140049568.27775.python-list@python.org>
References: <mailman.1964.1140031046.27775.python-list@python.org>	<43f3be60$0$11071$e4fe514c@news.xs4all.nl>
	<mailman.1978.1140049568.27775.python-list@python.org>
Message-ID: <43f50e1b$0$11067$e4fe514c@news.xs4all.nl>

David Hirschfield wrote:
<cut>
> My question was whether this is allowed? Can two calls be made via the 
> same ServerProxy instance while a request is already underway?
> 
> Clearer?
> -Dave
> 
<cut>

Much, and my preliminary answer is, I have no clue :-)
But knowing that python will throw an exceptions when something is not 
allowed and that we can analyze if the logic of the program breaks we do 
can build a test case!

I've taken the opportunity, but I might be as wrong was I am right (and 
still won't know which one it was):

So, I expect that when something un-allowed happens it will throw an 
exception and otherwise that the workflow on the server should resemble 
the work flow on the client:

So i created an async server with only one function (which is even worse 
  then your question):
def doSomething(self,threadID):
	randomWait= random.randrange(0,10)
	time.sleep(randomWait)
	print("Thread %s has slept for %s seconds" % threadID,randomWait))
	returnValue = "Thread %s has slept for %s seconds" % (threadID,randomWait)
	return returnValue

and a threaded client:
class testThread(threading.Thread):
     def run(self):
         xmlrpclib.server = xmlrpclib.ServerProxy("http://localhost:8080")
         x=xmlrpclib.server
         print(x.doSomething(self.getName()))

for i in range(100):
     testThread().start()

So when I run that I except that the output on the server is the same as 
the one on the client with an error margin within the second range 
(which would indicate that a certain thread has been scheduled a little 
earlier then the other), guess what the output of the two was?

Well I say this much, most of them where in sync (within the error 
margin) so I conclude that your question is answered with , yes you can 
have a call when another one is processed without intervening with each 
other( if you want that).

-- 
mph


From aleaxit at yahoo.com  Sun Feb 12 20:52:26 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 12 Feb 2006 17:52:26 -0800
Subject: Questions for BitTorrent's Author, Bram Cohen
References: <mailman.1801.1139793066.27775.python-list@python.org>
Message-ID: <1hanqwr.1pf5ask1kt153mN%aleaxit@yahoo.com>

Steve Holden <steve at holdenweb.com> wrote:

> Bram Cohen will be a keynoter at this year's PyCon, and has asked that
> the presentation be in the form of an interview.
> 
> I'd like the questions to be representative of as broad a cross-section
> of the Python community as possible. If you have a question you'd like
> to hear Bram answer please let me know and I'll try to include them.

OK, let me start this with a provocatory question...:

"Why Python?  For the prototype, sure.  But now that the protocol and
feature set have stabilized, surely you can get leaner and faster code
by redoing it all in C, can't you?"


Alex


From jrivero at latinux.org  Mon Feb 20 10:28:56 2006
From: jrivero at latinux.org (Jesus Rivero - (Neurogeek))
Date: Mon, 20 Feb 2006 11:28:56 -0400
Subject: [Python-Dev] (-1)**(1/2)==1?
In-Reply-To: <a5f55f2f0602200716h6c1281c2x57e1791373585fb@mail.gmail.com>
References: <a5f55f2f0602200716h6c1281c2x57e1791373585fb@mail.gmail.com>
Message-ID: <43F9E038.2040501@latinux.org>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hello!

    it's Ok. Python gets from 1/2 0 as 0 is the integer part of that
division. So, Python is interpreting -1**0 so you get 1 as answer.

you should try this (-1)**(1.0/2.0) so 1.0/2.0 is an operation returning
 0.5 completely.

 and you'll get:

>>> (-1)**(1.0/2.0)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ValueError: negative number cannot be raised to a fractional power


Regards,

 Jes?s (Neurogeek)


Jonathan Barbero wrote:
> Hello!
>   My name is Jonathan, i?m new with Python.
> 
>    I try this in the command line:
> 
>    >>> (-1)**(1/2)
>     1
> 
>    This is wrong, i think it must throw an exception.
>     What do you think?
> 
>     Bye.
>         Jonathan.
> 
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Python-Dev mailing list
> Python-Dev at python.org
> http://mail.python.org/mailman/listinfo/python-dev
> Unsubscribe: http://mail.python.org/mailman/options/python-dev/jrivero%40python.org.ve

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.1 (GNU/Linux)
Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org

iD8DBQFD+eA4dIssYB9vBoMRAuZXAJ4/hc6FrApyDxFScsv8w1kjc+Yi8QCfWzdb
Izl2OQUE3iPVeqBnvjErrHA=
=y5uC
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From tdelaney at avaya.com  Sun Feb 19 20:31:59 2006
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Mon, 20 Feb 2006 12:31:59 +1100
Subject: Which is faster? (if not b in m) or (if m.count(b) > 0)
Message-ID: <2773CAC687FD5F4689F526998C7E4E5F4DB969@au3010avexu1.global.avaya.com>

Jean-Paul Calderone wrote:

> Not since Python 2.4:
> 
>     >>> dis.dis(lambda: x not in y)
>       1           0 LOAD_GLOBAL              0 (x)
>                   3 LOAD_GLOBAL              1 (y)
>                   6 COMPARE_OP               7 (not in)
>                   9 RETURN_VALUE
>     >>> dis.dis(lambda: not (x in y))
>       1           0 LOAD_GLOBAL              0 (x)
>                   3 LOAD_GLOBAL              1 (y)
>                   6 COMPARE_OP               7 (not in)
>                   9 RETURN_VALUE
>     >>>

Damn - I missed that change. Peephole optimiser I guess.

Tim Delaney


From grblanco at gmail.com  Wed Feb  1 13:24:18 2006
From: grblanco at gmail.com (JerryB)
Date: 1 Feb 2006 10:24:18 -0800
Subject: locals() and dictionaries
Message-ID: <1138818258.895406.34130@g47g2000cwa.googlegroups.com>

Hi,
I have a dictionary, a string, and I'm creating another string, like
this:

dict = {}
dict[beatles] = "need"
str = "love"

mystr = """All you %(dict[beatles])s is %(str)s""" % locals()

Why do I get
keyerror: 'dict[one]'?

Is there a way to reference the elements in a dictionary with locals()
or do I need to create a temp variable, like

need = dict[one]
mystr = """All you %(need)s is %(str)s"""



From lycka at carmen.se  Thu Feb  2 08:53:44 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 02 Feb 2006 14:53:44 +0100
Subject: Python vs C for a mail server
In-Reply-To: <1138805854.533303.279610@g49g2000cwa.googlegroups.com>
References: <mailman.3994.1138546139.27774.python-list@python.org>
	<mailman.1197.1138549204.27775.python-list@python.org>
	<1138728303.669646.36940@g49g2000cwa.googlegroups.com>
	<drqa42$8k8$1@wake.carmen.se>
	<1138805854.533303.279610@g49g2000cwa.googlegroups.com>
Message-ID: <drt2t8$h4j$1@wake.carmen.se>

Randall Parker wrote:
> Magnus Lycka wrote:
> 
>>Randall Parker wrote:
>>
>>>Also, compile time errors get caught sooner. They get caught before
>>>tests even get written.
>>
>>Not if you do Test Driven Tevelopment. Then you write
>>the tests before you compile your target code! It's
>>also my experience that the write test - write code
>>- run test cycle in TDD with Python is often faster
>>than the plain edit - compile cycle in C++. More
>>extensive tests take longer, but so does linking of
>>C++ code...
> 
> 
> Magnus,
> 
> I see a problem with your argument: On the one hand you say that
> Python's lack of type declarations can be compensated for by Test
> Driven Development. But then you say Python has a bigger advantage in
> situations where requirements are not well defined. Well, when
> requirements are in flux and being explored during development it is a
> waste of time to write tests to test against nebulous requirements. TDD
> and poor requirements don't mix very well.

Not at all. Agile development methods such as XP, where TDD is
fundamental, were developed with the purpose of making to easy
to handle changes late in the project. "Embrace change" as
Kent Beck put it.

Unit tests aren't really used to verify that a whole program system
fulfils all requirements. They're there to verify that a small piece
of code works as the programmer intended. To be effective when the
requirements change, unit tests need to be fairly isolated, so that
one requirements change usually don't affect more than a few tests.

For each change in requirements, most existing requirements hold,
and hopefully, the vast majority of tests would still run correctly.
With a large set of automated unit tests, you can confidently change
your code to fulfill the new requirements without breaking any
existing functionality without noticing.

> As for changing argument types: But this is exactly the sort of
> situation where I find myself getting into trouble in Python. I have to
> change some type and I forget everywhere I've passed it or returned it.

Strange. I very rarely have trouble with this. What happens when you
run your tests? Surely things break in the cases where the type change
cause trouble, and you get tracebacks that tell you exactly what and
where you need to change things. The only difference compared to the
compiler, is that it won't force you to change things in places where
things still work as intended even though a type was changed.

Or...don't you have automated tests? Ouch. If you (like me) feel a
little lazy to write a lot of test scripts, you can use a test tool
such as TextTest, that compares output between test runs, rather than
forcing you to write lots of scripts with plenty of assertions. The
effort required to get started is probably bigger there though. (I
don't really know, it was all set up for me at work.)

> In C++ if I make changes the compiler is going to keep complaining and
> pointing out type clashes I've introduced due to changing a variable's
> type. Granted, it is a pain to change type declarations. But visiting
> those places often makes me think thru the ramifications of changes.

It's also a pain to write unit tests, but it's much more rewarding
than writing type declarations. Not only does it force you to think
through the ramifications of changes, but you also document your
intentions through your tests.


From scott.daniels at acm.org  Fri Feb 10 14:20:56 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Fri, 10 Feb 2006 11:20:56 -0800
Subject: Legality of using Fonts
In-Reply-To: <1139591308.864757.154740@g44g2000cwa.googlegroups.com>
References: <1139591308.864757.154740@g44g2000cwa.googlegroups.com>
Message-ID: <43ece654$1@nntp0.pdx.net>

Kamilche wrote:
> I have a question for all you Pythoneers out there. I'm making a game
> with Python, and have a need for fonts. I am currently using a free
> TrueType font, but am considering switching to a bitmap font instead.
> 
> Let's say I own a font, and use it in a paint program to ....

Typically you don't "own" a font, but you have a license to use it.
You need to read the license to figure out what you are allowed to do
with it.

--Scott David Daniels
scott.daniels at acm.org


From m_massala at hotmail.com  Fri Feb 24 09:46:07 2006
From: m_massala at hotmail.com (Mimi)
Date: 24 Feb 2006 06:46:07 -0800
Subject: pyserial
References: <1140702690.396244.142370@g43g2000cwa.googlegroups.com>
	<heoLf.410477$0l5.143902@dukeread06>
Message-ID: <1140792367.510920.296820@z34g2000cwc.googlegroups.com>

thanks philippe,
Hi will take care for the that.



From paul at boddie.org.uk  Thu Feb 23 16:13:34 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 23 Feb 2006 13:13:34 -0800
Subject: a little more help with python server-side scripting
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<dSoLf.1663$No6.38996@news.tufts.edu>
Message-ID: <1140729214.352258.242320@u72g2000cwu.googlegroups.com>

John Salerno wrote:
> John Salerno wrote:
>
> > Unfortunately, I don't completely understand what it is I need to do
> > now. Where do I put the path they mentioned? And what do they mean by my
> > script path?
>
> Ok, seems like the verdict is that the server doesn't have mod_python
> nor does it detect the .psp extension. It can, however, detect the .py
> extension.

>From what I understand of the situation, noting that I haven't used IIS
with Python at all as far as I remember (and it'd be about six or seven
years ago if I did), you're using Windows hosting where .py files get
special treatment - ie. they don't get served up as text files but are
executed somehow - and that this is probably configured by your
provider as described in this document (found via Google using the
search text "IIS Python"):

http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B276494

> But does this mean I can simply include Python code in my
> HTML files, and then give my HTML files a .py extension?

No, it means that you either write Python programs which produce pages
as output, according to the CGI specification, or that you embed Python
code inside ASP files, as described in the above document.

> I don't know how to test this because I don't know how to write inline code yet. Is
> it something like:
>
> <%@ include file=something %>

I haven't used ASP, and I've been working hard to remove from my memory
any trace of similar systems (eg. JSP), but I imagine that if you want
to include normal Python programs inside ASP files, there may be a way
of using some kind of "include" directive. Take a look at the above
document for some ideas.

> ? They say:
>
> "Please note that you may map .py to .html extension. However, if you
> set this mapping, .html will not work with the normal html tags anymore."
>
> But I don't know what this means about 'mapping' the extension and what
> it means that html tags won't work anymore.

I think they're just trying to say that if you decide that your Python
programs should have a .html extension and still be executed as Python
programs, don't expect the server to serve up HTML pages any more.

Paul



From lbolognini at gmail.com  Fri Feb 10 20:08:21 2006
From: lbolognini at gmail.com (lbolognini at gmail.com)
Date: 10 Feb 2006 17:08:21 -0800
Subject: Socket Programming - Question
In-Reply-To: <1139616664.208516.254900@f14g2000cwb.googlegroups.com>
References: <1139616664.208516.254900@f14g2000cwb.googlegroups.com>
Message-ID: <1139620100.958169.235490@g43g2000cwa.googlegroups.com>

duncanm255 at hotmail.com wrote:

> An example of what I am looking to use this for is for remote virus
> scanning.  So System2 listens, System1 connects and sends it the

Just found this through OSNews:
http://rpyc.sourceforge.net/

It actually seems to be a perfect fit for your job.

Lorenzo



From aleaxit at yahoo.com  Fri Feb  3 23:24:24 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Fri, 3 Feb 2006 20:24:24 -0800
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<drvd56$nb3$1@wake.carmen.se>
	<1138967463.440194.184710@g49g2000cwa.googlegroups.com>
	<pan.2006.02.03.12.32.47.209717@REMOVETHIScyber.com.au>
	<1ha6a71.10mos5m9evcy8N%aleaxit@yahoo.com>
	<pan.2006.02.03.16.36.01.448835@REMOVETHIScyber.com.au>
Message-ID: <1ha79fk.1dqcb9xacqrzcN%aleaxit@yahoo.com>

Steven D'Aprano <steve at REMOVETHIScyber.com.au> wrote:
   ...
> would be. Token? Too specific. Maybe it would have been better to just
> have just said "...but now foo.bar has ...".

Agreed.

> model I have is "y" is a label in some namespace x, and you have to (in
> some sense) look up where "y" should go regardless of whether you are
> setting the value or getting the value.
> 
> Do you think this model is so far from the actual behaviour of Python that
> it is useless? Or is it fair to lump getting and setting attributes/names
> together?

I think it's reasonable: Python does first check if type(x).y is an
overriding descriptor (==one with a __set__ method), at least in the
mainstream case (oldstyle classic are weird;-).

> > and in "import x.y" it's
> > "bind x AND then bind y in namespace y".
> 
> I assume that's a typo and you mean "bind y in namespace x".

Yep.  Differently from the other bots (tim and /f), I'm programmed to
randomly make errors once in a while -- makes it easier to pass the
Turing test (many people mistakenly think I'm human, since "to err is
human", while nobody would think THAT of impeccabile timbot and effbot).

> But even "import x.y" is conceptually a lookup, equivalent to x.y =
> __import__("x.y"), with the understanding that x = __import__("x") is
> automagically run first.
> 
> [hand-waving, hand-waving, hand-waving... of course imports do a lot more
> than just setting a name in a namespace]

Of course, but so do some other statements that ALSO bind a name (in the
current namespace only, in today's Python), such as class and def.
We're just focusing on the binding part;-).

 
> But in all three of:
> 
> foo.bar = something
> something = foo.bar
> import foo.bar
> 
> the hierarchy goes from left to right, with bar being "inside" foo, for
> some meaning of inside. The Original Poster's syntax would reverse that,
> with def foo.bar(x,y) creating parameter foo "inside" method bar.

True.  Of course, the OP might argue that if x.f() can CALL f(x)
[placing x ``inside'' f], it's fair that a def of a composite name
should also ``swap insideness and outsideness'' similarly.  But, as I
said, "I'm not supporting the OP's idea; just rejecting the specific
objections to it". For once, I have a hard time articulating exactly why
I'd dislike such semantics for hypothetic syntax "def x.y", besides
minor points such as the difficulties wrt generalizing to "def x.y.z"...
but I do know which objections are NOT the ones which make me feel such
dislike!-)


Alex


From steve at REMOVETHIScyber.com.au  Sun Feb 19 03:02:33 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sun, 19 Feb 2006 19:02:33 +1100
Subject: os.mkdir simple help
References: <1140335502.110014.35870@g47g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.19.08.02.33.411906@REMOVETHIScyber.com.au>

On Sat, 18 Feb 2006 23:51:42 -0800, m.wanstall wrote:

> test = input("Please enter project name: ")
> setupProject(test)
> 
> If I enter "roger" as my input I get : NameError: name 'roger' is not
> defined
> 
> I know it's incredibly simple but help would be much appreciated!
> Thanks in advance!

"input" takes the user-entered string and evaluates it as a Python
expression. You want raw_input().


-- 
Steven.



From sambyerly at netscape.net  Fri Feb 17 15:29:06 2006
From: sambyerly at netscape.net (nick)
Date: 17 Feb 2006 12:29:06 -0800
Subject: Click this link, scroll to the bottom, and get your own free mall!!
Message-ID: <1140208146.447571.285890@g43g2000cwa.googlegroups.com>

http://www.telebay.com/esolutions/mall.html



From Matt  Fri Feb 17 21:01:38 2006
From: Matt (Matt)
Date: Sat, 18 Feb 2006 02:01:38 GMT
Subject: Komodo - Will it Lock Me In?
Message-ID: <yEncExpress_Rulz!_www.techsono.com_3223072898@firstva.com>

Hi Everybody,

If I were to use Komodo to write in Python, would it add a lot of goo to my 
code such that I would not be able to switch to another IDE without having to 
claw my way out of a tarpit first?

Any other thoughts on Komodo? I am considering it because I am hoping to find 
a solution to the install-packages-until-you-go-blind aspect of Python. 
Setting up a serious, cross-platform, gui development environment is quite a 
struggle for a newbie.

Thanks,
Matt





From michaeltaft at gmail.com  Thu Feb  9 12:34:03 2006
From: michaeltaft at gmail.com (mwt)
Date: 9 Feb 2006 09:34:03 -0800
Subject: 450 Pound Library Program
In-Reply-To: <1139470553.811335.245310@g47g2000cwa.googlegroups.com>
References: <1139351498.090768.82270@o13g2000cwo.googlegroups.com>
	<43e9f1e1$0$612$636a15ce@news.free.fr>
	<1139411880.032250.181300@g43g2000cwa.googlegroups.com>
	<dsd4to$umq$1@wake.carmen.se>
	<43ea2fbf$0$31862$626a54ce@news.free.fr>
	<1139470553.811335.245310@g47g2000cwa.googlegroups.com>
Message-ID: <1139506443.650815.243320@g14g2000cwa.googlegroups.com>

BTW - I can't find any code examples of how to interrupt a beast like
this. A regular ctrl-c doesn't work, since the separate threads just
keep executing. Is this a case where you need to iterate through all
threads and stop each one individually? How would that look?



From lycka at carmen.se  Wed Feb 22 13:07:01 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 22 Feb 2006 19:07:01 +0100
Subject: new wooden door step - fixing and finishing
In-Reply-To: <1140598234.454510.281820@g14g2000cwa.googlegroups.com>
References: <1140598234.454510.281820@g14g2000cwa.googlegroups.com>
Message-ID: <dti985$fhf$1@wake.carmen.se>

jkn wrote:
> Hi all

Hi!

>     I'm considering having a go at replacing the wooden door step to
> our back door. The original is loose and rotting.

Aha, like old perl scripts.

> I'm sure some of this will be clearer when I remove the (metal) door
> frame - how is such a step fixed? Vertical frame fixings?

cx_freeze maybe?

> Also, any suggestions for treating/finishing such an item, subject to
> heavy use, to prevent future rot? I was wondering about treating it
> wilth liberal amounts of Teak Oil or similar...

Perhaps a list comprehension will do? Or a regular expression?


From ehartfield at bungeecraft.com  Wed Feb  8 15:33:17 2006
From: ehartfield at bungeecraft.com (Edward Hartfield)
Date: Wed, 08 Feb 2006 14:33:17 -0600
Subject: Number Format function
In-Reply-To: <1139430545.465074.322060@z14g2000cwz.googlegroups.com>
References: <mailman.1603.1139418641.27775.python-list@python.org>
	<1139430545.465074.322060@z14g2000cwz.googlegroups.com>
Message-ID: <43EA558D.8080206@bungeecraft.com>

Thanks.  I noticed the bugs later.  But after talking with my boss, he 
suggested something more elegant (again *untested*, yet):

import locale

def number_format(num, places=0)
    """Format a number according to locality and given places"""
    locale.setlocale(locale.LC_ALL, locale.getdefaultlocale()[0])
    return locale.format("%.*f", (places, num), 1)

wittempj at hotmail.com wrote:
> Your code has a little bug, I highly recommend to add a test to your
> code, for an idea see below - I fixed your code as well.
>
> #!/usr/bin/env python
> import math
>
> def number_format(num, places=0):
>     """Format a number with grouped thousands and given decimal
> places"""
>     #is_negative = (num < 0)
>     #if is_negative:
>     #    num = -num
>
>     places = max(0,places)
>     tmp = "%.*f" % (places, num)
>     point = tmp.find(".")
>     integer = (point == -1) and tmp or tmp[:point]
>     decimal = (point != -1) and tmp[point:] or ""
>
>     count = commas = 0
>     formatted = []
>     for i in range(len(integer) - 1, 0, -1):
>         count += 1
>         formatted.append(integer[i])
>         if count % 3 == 0:
>             formatted.append(",")
>     formatted.append(integer[0]) # this misses in your part
>     integer = "".join(formatted[::-1])
>     return integer+decimal
>
>
> #
> # add something like this: it helps to prevent you break your code
> #
> import unittest
>
> class test_number_format(unittest.TestCase):
>     def test(self):
>         self.assertEqual(number_format(1000000, 2), '1,000,000.00')
>         self.assertEqual(number_format(100000, 2), '100,000.00')
>         self.assertEqual(number_format(100, 2), '100.00')
>         self.assertEqual(number_format(1000000.33, 2), '1,000,000.33')
>         self.assertEqual(number_format(1000000.333, 2), '1,000,000.33')
>         self.assertEqual(number_format(1000000.3, 2), '1,000,000.30')
>         self.assertEqual(number_format(123456, 2), '123,456.00')
>         self.assertEqual(number_format(12345, 2), '12,345.00')
>         self.assertEqual(number_format(123, 2), '123.00')
>         self.assertEqual(number_format(123456.33, 2), '123,456.33')
>         self.assertEqual(number_format(12345.333, 2), '12,345.33')
>         self.assertEqual(number_format(123.3, 2), '123.30')
>
> suite = unittest.makeSuite(test_number_format)
> unittest.TextTestRunner(verbosity=2).run(suite)
>
>   
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From jeff at taupro.com  Mon Feb  6 07:47:00 2006
From: jeff at taupro.com (Jeff Rush)
Date: Mon, 06 Feb 2006 06:47:00 -0600
Subject: Booksigning Party at PyCon This Year -- UPDATE
Message-ID: <43E74544.9080000@taupro.com>

DO NOT BRING YOUR OWN BOOKS

For inventory security reasons, please do NOT bring your own books to the 
bookstore to be signed.  Mixing attendee books with store books in a party 
atmosphere would be difficult to manage and we need to be considerate of the 
store.  I mispoke in the original announcement.

So that the bookstore can have copies on-hand, we'd like to collect a list
of titles you'd consider having signed.  Please edit the following wiki page
and add your choices.  Authors, you can add your books too.

    http://us.pycon.org/TX2006/BookSigning

-Jeff


From timr at probo.com  Tue Feb 21 02:54:35 2006
From: timr at probo.com (Tim Roberts)
Date: Tue, 21 Feb 2006 07:54:35 GMT
Subject: html parser , unexpected '<' char in declaration
References: <1140473997.262973.149260@f14g2000cwb.googlegroups.com>	<mailman.2198.1140483714.27775.python-list@python.org>
	<1140488536.933840.65530@o13g2000cwo.googlegroups.com>
	<mailman.2200.1140489845.27775.python-list@python.org>
Message-ID: <pkhlv1hkcrmh7li0t25p8bj6kojk6r781d@4ax.com>

"Jesus Rivero - (Neurogeek)" <jrivero at latinux.org> wrote:
>
>hmmm, that's kind of different issue then.
>
>I can guess, from the error you pasted earlier, that the problem shown
>is due to the fact Python is interpreting a "<" as an expression and not
>as a char. review your code or try to figure out the exact input you're
>receving within the mta.

Well, Jesus, you are 0 for 2.  Sakcee pointed out what the exact problem
was in his original message.  The HTML he is being given is ill-formed; the
<!DOCTYPE directive is not closed.  The SGML parser finds a <html> tag
which it thinks is inside the <!DOCTYPE, and that's illegal.

>> well probabbly I should explain more.  this is part of an email . after
>> the mta delivers the email, it is stored in a local dir.
>> After that the email is being parsed by the parser inside an web based
>> imap client at display time.
>> 
>> I dont think I have the choice of rewriting the message!? and I dont
>> want to reject the message alltogether.
>> 
>> I can either 1-fix the incoming html by tidying it up
>> or 2- strip only plain text out and dispaly that you have spam, 3 - or
>> ignore that mal-formatted tag and display the rest

If this is happening with more than one message, you could check for it
rather easily with a regular expression, or even just ''.find, and then
either insert a closing '>' or delete everything up to the <html> before
parsing it.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From tjreedy at udel.edu  Sat Feb  4 03:15:24 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 4 Feb 2006 03:15:24 -0500
Subject: Another try at Python's selfishness
References: <ds0ed1$npe$1@sea.gmane.org>
	<20060203211426.2697.1835776858.divmod.quotient.6256@ohm>
Message-ID: <ds1nqp$cbo$1@sea.gmane.org>


"Jean-Paul Calderone" <exarkun at divmod.com> wrote in message 
news:20060203211426.2697.1835776858.divmod.quotient.6256 at ohm...
> I'm not sure I follow.  Surely you're not suggesting that this doesn't 
> work:
>
>    >>> class X:
>    ...     def foo(self):
>    ...         print 'X.foo', self
>    ...
>    >>> class A(X):
>    ...     pass
>    ...
>    >>> o = A()
>    >>> A.foo(o)
>    X.foo <__main__.A instance at 0xb7cab64c>
>    >>>

Either things have changed or I was misinformed and neglected to verify ;-(





From onurb at xiludom.gro  Mon Feb 13 04:23:07 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Mon, 13 Feb 2006 10:23:07 +0100
Subject: Another n00b: Removing the space in "print 'text', var"
In-Reply-To: <43efb1ba$0$14855$c3e8da3@news.astraweb.com>
References: <43efb1ba$0$14855$c3e8da3@news.astraweb.com>
Message-ID: <43f05016$0$1408$626a54ce@news.free.fr>

HappyHippy wrote:
> More of a minor niggle than anything but how would I remove the
> aforementioned space?


> eg.
> strName = 'World'
> print 'Hello', strName, ', how are you today?'


Already got an anwser, now just a coding-style suggestion: hungarian
notation is *evil*. And even *more* evil with a dynamically-typed language.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From a.schmolck at gmail.com  Sun Feb 19 17:48:41 2006
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: 19 Feb 2006 22:48:41 +0000
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<mailman.2132.1140378051.27775.python-list@python.org>
Message-ID: <yfs7j7roth2.fsf@oc.ex.ac.uk>

"Fredrik Lundh" <fredrik at pythonware.com> writes:

> Alexander Schmolck wrote:
> 
> > You might want to argue about whether scriping language is a meaningful and
> > useful concept, but it's really hard to see how you could talk about "scripting
> > languages" without including python.
> 
> define "scripting language".

Pretty much any definition that isn't practically useless would do. I'd
personally opt for something like:

 A language that doesn't make all common simple tasks difficult and painful.

If that sounds too wishy-washy, note that I specifically question whether
scripting language is a useful and meaningful concept to start with -- I just
find it silly to take issue with calling python a scripting language but not
with the term scripting language itself (especially given that even the python
tutorial talks about python scripts and that almost anyone who uses the term
would include python).
 
> the only even remotely formal definition I've ever seen is "language with
> designed to script an existing application, with limited support for handling
> its own state". 

> Early Tcl and JavaScript are scripting languages, Python is not.

Right. Which shows that by this definition scripting language is not a
meaningful and useful concept. No one will understand you correctly when you
refer to "scripting language" and mean only something like the above -- and
unless you spend a lot of your time talking about early tcl and early
javascript I doubt you'd need a word for it, either.

'as


From fakeaddress at nowhere.org  Tue Feb  7 18:33:26 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Tue, 07 Feb 2006 23:33:26 GMT
Subject: Too Many if Statements?
In-Reply-To: <mailman.1574.1139352727.27775.python-list@python.org>
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com><dsaqkj$jhm$1@xenon.Stanford.EDU>	<GU8Gf.22899$Jd.6095@newssvr25.news.prodigy.net>
	<mailman.1574.1139352727.27775.python-list@python.org>
Message-ID: <a7aGf.22908$Jd.8581@newssvr25.news.prodigy.net>

Terry Reedy wrote:
> "Bryan Olson" wrote:
> 
>>I made a script with 100,000 if's, (code below) and it appears
>>to work on a couple systems, including Python 2.4.2 on Win32-XP.
>>So at first cut, it doesn't seem to be just the if-count that
>>triggers the bug.
> 
> The OP did not specify whether all of his if-tests were sequential as in 
> your test or if some were nested.  I vaguely remember there being an indent 
> limit (40??).

A 40-level indent limit is reasonable (I may get around to looking
it up and/or testing it), but if we believe 'slogging' and Alan, what
we have here is an outright Python bug. They did not report a message
about static code being too deeply nested, nor about dynamic calls
exceeding a recursion limit. They reported incorrect behavior.

My favorite joke goes:

     Patient:  Doctor...doctor -- it hurts when I do that! (With 'that'
     being some movement that is unusual but normally innocuous.)

     Doctor:  Don't do that.

Ah...cracks me up. Funny on so many levels.


-- 
--Bryan


From iainking at gmail.com  Wed Feb 22 09:04:14 2006
From: iainking at gmail.com (Iain King)
Date: 22 Feb 2006 06:04:14 -0800
Subject: Python CGI not working in Firefox but does in IE
In-Reply-To: <1140616398.977605.104440@g14g2000cwa.googlegroups.com>
References: <1140615651.847586.258300@f14g2000cwb.googlegroups.com>
	<1140616398.977605.104440@g14g2000cwa.googlegroups.com>
Message-ID: <1140617053.949093.24460@f14g2000cwb.googlegroups.com>


Iain King wrote:
> Harlin Seritt wrote:
> > I have this Python CGI script running:
> >
> > [CODE]
> > print 'Content-type: text/plain\n'
> >
> > location = 'http://server1.com'
> >
> > page = '''
> > <html>
> > <head>
> > <meta http-equiv="Refresh" content="0; URL='''+location+'''">
> > </head>
> > <body></body>
> > </html>'''
> >
> > print page
> > [/CODE]
> >
> > It works fine and redirects perfectly when using Internet Explorer but
> > only shows this in a Firefox window:
> >
> > [OUTPUT]
> > <html>
> > <head>
> > <meta http-equiv="Refresh" content="0; URL=http://server1.com">
> > </head>
> > </html>
> > [/OUTPUT]
> >
> > Is there anything I can do to fix this?
> >
> > Also, is there a redirect command somewhere within Python CGI that can
> > get this done instead as I would actually prefer to have the CGI code
> > execute this rather than depend on the HTML to do it.
> >
> > Thanks,
> >
> > Harlin Seritt
>
> this snippet works (from code I wrote to implement a shoutbox):
>
> print '''<html>
> <head>
> 	<meta http-equiv="refresh" content="0;URL='''+HOME+'''" />
> </head>
> <body>
> <p>Please wait...</p>
> </body>
> </html>'''
>
> I assume your version doesn't work because of the uppercase 'R'.
> 
> Iain

There's a well known phrase about the word 'assume'...

Iain



From dcoffin at gmail.com  Mon Feb 20 11:46:34 2006
From: dcoffin at gmail.com (David Coffin)
Date: Mon, 20 Feb 2006 16:46:34 +0000
Subject: changing value of 'self' when subclassing int
Message-ID: <15A68D0C-9DFC-4541-8DCE-DCDBA9F748BC@gmail.com>

I'd like to subclass int to support list access, treating the integer  
as if it were a list of bits.
Assigning bits to particular indices involves changing the value of  
the integer itself, but changing 'self' obviously just alters the  
value of that local variable.
Is there some way for me to change the value of the BitSequence  
object itself? I've also tried wrapping and delegating using  
__getattr__, but I couldn't figure out how to handle in-place methods.

Thanks for your help,
David Coffin


class BitSequence(int):
     """An integer emulating a sequence of bits, subclassing int."""
     def __new__(cls, value, length=32):
         inst = super(BitSequence,cls).__new__(cls, value)
         inst.length = length
         return inst

     def __setitem__(self, index, bit):
         mask = 1 << self.length - index - 1
         if bit == 1:
             # XXX only changing local 'self'
             self |= mask
         elif bit == 0:
             self &= ~mask

     def __getitem__(self, i):
         return (self >> (self.length - i -1)) & 1

     def __repr__(self):
         s = ''
         for i in xrange(self.length):
             s = str(self >> i & 1) + s
         return s + " : " + str(self)


From steve at holdenweb.com  Wed Feb 22 14:58:17 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 22 Feb 2006 14:58:17 -0500
Subject: redirecting to a content page
In-Reply-To: <43fc2446$0$30861$636a55ce@news.free.fr>
References: <1140565482.106127.276650@z14g2000cwz.googlegroups.com>
	<43fc2446$0$30861$636a55ce@news.free.fr>
Message-ID: <dtifop$dll$1@sea.gmane.org>

bruno at modulix wrote:
> Shreyas wrote:
[...]
>>The thing is, processing.py doesn't have any content that I want to
>>display to the user.
> 
> 
> And this is a GoodThing(tm). A successful post should always be followed
> by a redirect.
> 
Really? Why's that?

 >[...]

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From hortitude.eyeball at gmail.com  Fri Feb 17 17:07:57 2006
From: hortitude.eyeball at gmail.com (hortitude.eyeball at gmail.com)
Date: 17 Feb 2006 14:07:57 -0800
Subject: xml.dom.ext documentation
Message-ID: <1140214077.343893.288600@g44g2000cwa.googlegroups.com>

I figure I must just be missing something, but I can't seem to find
good documentation for xml.dom.ext.  What I'm hoping for is just a
simple list of what actually is available in that package (what other
packages get included if you import xml.dom.ext and what functions are
available).



From onurb at xiludom.gro  Tue Feb 14 04:18:26 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Tue, 14 Feb 2006 10:18:26 +0100
Subject: Python / Apache / MySQL
In-Reply-To: <1139907519.427789.188760@g14g2000cwa.googlegroups.com>
References: <1139907519.427789.188760@g14g2000cwa.googlegroups.com>
Message-ID: <43f1a07f$0$25422$636a55ce@news.free.fr>

vpr wrote:
> Hi All
> 
> I want to build an Website using Apache / Python and MySQL.

Good choice, good choice, bad choice...
Why not using PostgresSQL (if you need a *real* RDBMS) or SQLite (if you
don't...)

> I dont want to spend to much time hacking html. I'm looking for some
> recommendations
> e.g. should I be using mod_python ?

mod_python is mostly a 'low-level' Apache API binding. Better use a
higher-level tool on top of it. AFAICT, Myghty might be of some help here.

> whats the best module for mysql ?

Psycopg ?-)

oops, sorry....

> any suggestings so I could get my site up in a day ?

Look for Myghty, Pylons (built on Mygthy), or Django. There's also
Turbogears, but it's based on CherryPy, so you won't really take
advantage of mod_python's Apache integration.



-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From eratherXXX at forth.com  Sun Feb 12 20:48:24 2006
From: eratherXXX at forth.com (Elizabeth D Rather)
Date: Sun, 12 Feb 2006 17:48:24 -0800
Subject: Is Forth for real?
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
	<1139754010.067582.214830@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>
	<1v44c3-geo.ln1@lairds.us>
Message-ID: <11uvpbe6vkqdc24@news.supernews.com>

"Cameron Laird" <claird at lairds.us> wrote in message 
news:1v44c3-geo.ln1 at lairds.us...
> In article <pan.2006.02.12.15.11.04.739314 at REMOVETHIScyber.com.au>,
> Steven D'Aprano  <steve at REMOVETHIScyber.com.au> wrote:
> .
> .
> .
>>on the web for each language. By comparison, even Forth gives 13 million
>>plus hits, and who uses Forth?
> .
> .
> .
> The programmers of, among other things, the FedEx bar-code reader,
> the Sun boot loader, and parts of the Space Shuttle.

We have several thousand customers, although we don't hear from them enough 
to know how active they are.  Most of them are doing embedded systems (such 
as the FedEx package tracker), although there are also quite a few doing 
Windows apps.

A lot of our embedded work is for aerospace and government customers, plus a 
number in the private sector.  All the DirecTV uplink antennas are 
controlled by one of our systems made by VertexRSI, 
http://www.tripointglobal.com/vertexrsi.html.  Another really neat customer 
is Sunrise Systems, http://www.sunrisesystems.com/index.htm.  They make 
moving displays, and are working on one for one of the rebuilt World Trade 
Center bldgs, one to be installed in Switzerland next month, and something 
for Disney World.

Open Firmware has already been mentioned, and I should add that IBM's 
high-end servers also use it.  I teach Forth courses there once or twice a 
year, and have trained a couple hundred engineers in IBM alone.

You can get more info on our web site www.forth.com, including a link to a 
paper presenting a history of Forth.

Cheers,
Elizabeth

-- 
==================================================
Elizabeth D. Rather   (US & Canada)   800-55-FORTH
FORTH Inc.                         +1 310-491-3356
5155 W. Rosecrans Ave. #1018  Fax: +1 310-978-9454
Hawthorne, CA 90250
http://www.forth.com

"Forth-based products and Services for real-time
applications since 1973."
================================================== 



From lycka at carmen.se  Fri Feb 17 09:32:10 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 17 Feb 2006 15:32:10 +0100
Subject: how to get function names from the file
In-Reply-To: <1140041022.500870.141430@g14g2000cwa.googlegroups.com>
References: <1140041022.500870.141430@g14g2000cwa.googlegroups.com>
Message-ID: <dt4mpa$htc$1@wake.carmen.se>

Petr Jakes wrote:
> I have got names of functions stored in the file. For the simplicity
> expect one row only with two function names: printFoo, printFOO
> In my code I would like to define functions and then to read function
> names from the file, so the functions can be executed in the order the
> function names are stored in a file.

Somehow, when people invent little languages like you are doing now,
the languages tend to grow over time...until you realize that you
should have written the scripts in Python... It's all up to you of
course, but making your code contain proper Python code might be
something to consider. Little languages are sometimes useful.

luis.armendariz at gmail.com wrote:
> functions = ("printFoo", "printFOO")    # list or tuple of strings from
> file, or wherever
> for function in functions:
>     call = function + "()"
>     eval(call)

I wouldn't do this. eval has security issues, and it's
overkill for simply finding names in a namespace as you
saw in the other replies.

Kent Johnson wrote:
 > If the functions are in the same module as the calling code:
 > functions=('printFoo', 'printFOO')
 > for function in functions:
 >    globals()[function]()

and Larry Bates wrote (slightly corrected):
 > Create dictionary with the function names as keys and the pointer to
 > function definition as value:
 >
 > fdict={'printFoo': printFoo, 'printFOO': printFOO}
 > functions=('printFoo', 'printFOO')
 > for function in functions:
 >     if fdict.has_key(function): fdict[function]()
 >     else:
 >         print "No function named=%s defined" % function

These two options are basically the same. The
difference is that Kent suggest that you use a
mapping of names to functions provided by Python,
while Larry suggests that you make one yourself.
(BTW, instead of globals() you might want locals()
depending on what scope your functions are defined
in.)

While Kent's suggestion is a little less work, Larry's
suggestion buys you some more benfits:

- You can use other names than the actual function names
   as keys in the dict. This means that:
   -You can use reserved words (in, while etc) in your little
    script
   -You can rename functions and reorganize your code without
    breaking your scripts.
   -You can have command names in your script that contain
    national characters, spaces, punctuation, start with digits,
    etc (won't, stop!, 1st time, 1.2.45.start etc).

- It's safer: You control exactly what functions the
   script might call. Those who write code you run eval
   on can basically get arbitrary code executed.

$ cat > evil.py
print "Gotcha"
$ python
[snip]
 >>> def x(): print 'Ok'
...
 >>> eval('x'+'()')
Ok
 >>> eval('__import__("evil") and x'+'()')
Gotcha
Ok

If you want more than just function names in your minilanguage,
you might want to have a look at the shlex module.


From __peter__ at web.de  Mon Feb 20 06:44:49 2006
From: __peter__ at web.de (Peter Otten)
Date: Mon, 20 Feb 2006 12:44:49 +0100
Subject: Quesion about the proper use of __slots__
References: <1140424508.393412.79140@o13g2000cwo.googlegroups.com>
	<43f9825e$0$4777$636a55ce@news.free.fr>
	<1140426860.033363.237150@o13g2000cwo.googlegroups.com>
	<dtc219$h0a$01$1@news.t-online.com>
	<1140428016.170547.315710@g47g2000cwa.googlegroups.com>
	<1140432487.272405.297100@f14g2000cwb.googlegroups.com>
	<1140434225.164304.230440@z14g2000cwz.googlegroups.com>
Message-ID: <dtca02$pn3$03$2@news.t-online.com>

bonono at gmail.com wrote:

> 
> Zefria wrote:
>> Well, my computer tends to run at about 497 to 501 out of 504 MB of RAM
>> used once I start up Gnome, XMMS, and a few Firefox tabs, and I'd
>> prefer not to see things slipping into Swap space if I can avoid it,
>> and the fighter data would be only part of a larger program.
>>
>> And as I said, learning how to use __slots__ is important enough to
>> hazard a premature guess this time around. If I mess up, the worst that
>> happens is that I have to write down a new variable name in two places
>> instead of one now.
> 
> For this particular setup, I don't think it would be a concern given
> your mentioned size as you are very unlikely to be actively using all
> the apps at the same time and linux is quite efficient in handling it.
> 
> However, I don't think attempting to use __slots__ in this case is bad
> either. Afterall, one of the strength of python is allowing you to
> quickly test out different approachs.

Yes, something like

import sys

class Fighter(object):
    if "--use-slots" in sys.argv:
        __slots__ = [...]


and then comparing

$ python fighters.py

with

$ python fighters.py --use-slots

might be instructive. I don't think the OP will perceive a difference. 

> He could be working on a machine with < 1M RAM or some other
> constraints.

I have 256K, by the way.

Peter



From cyril.bazin at info.unicaen.fr  Tue Feb 28 08:08:05 2006
From: cyril.bazin at info.unicaen.fr (Cyril Bazin)
Date: Tue, 28 Feb 2006 14:08:05 +0100
Subject: Vectorization and Numeric (Newbie)
In-Reply-To: <Pine.LNX.4.63.0602281346010.18656@pantelleria.ifi.uio.no>
References: <Pine.LNX.4.63.0602281346010.18656@pantelleria.ifi.uio.no>
Message-ID: <a10b8d620602280508n502ac28oe02a8d70bc2b704f@mail.gmail.com>

Are you looking for the "map" function?

>>> def f(x): return x+4
>>> map(f, [1,2,3,3,70])
[5, 6, 7, 7, 74]

Cyril

On 2/28/06, Ronny Mandal <ronnyma at math.uio.no> wrote:
>
> Assume you have a mathematical function, e.g. f(x) = x + 4
>
> To calculate all the values from 1 to n, a loop is one alternative.
>
> But to make this function work with vectors instead i.e
> f(x_vector) = result_vector,
> how should the function then be implemented?
>
> Thanks
>
> RM
>
> --
>
> Support bacteria - it's the only culture some people have!
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From auch-ich-m at g-kein-spam.com  Sat Feb 25 09:07:34 2006
From: auch-ich-m at g-kein-spam.com (=?UTF-8?B?QW5kcsOp?= Malo)
Date: Sat, 25 Feb 2006 15:07:34 +0100
Subject: Problem with Property
References: <TsydnRFxOJsBw53ZnZ2dnUVZ_tqdnZ2d@comcast.com>
Message-ID: <95079633.aiQev8x7lQ@news.perlig.de>

* none wrote:

> classMyObject:
[...]

> As you can see, the _getProperty() method gets called properly when I do
>   'o.value'  but 'o.value = 123' does not seem to use the property
> stucture.   I can't figure out why 'o.value=123' does not call
> _setProperty()
> 
> Any ideas?

property only works as intended with new style classes.

nd
-- 
>>> Muschelflucht-Zusatzeinrichtung.
>> Shell-Escape ist ja noch klar, aber `Zusatzeinrichtung'?
> extension?
Feature.                          -- gefunden in de.org.ccc


From rschroev_nospam_ml at fastmail.fm  Mon Feb  6 15:47:10 2006
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Mon, 06 Feb 2006 20:47:10 GMT
Subject: Accessing Windows Serial Port
In-Reply-To: <1139253898.601680.265220@g44g2000cwa.googlegroups.com>
References: <1139253898.601680.265220@g44g2000cwa.googlegroups.com>
Message-ID: <iBOFf.239863$z43.7662700@phobos.telenet-ops.be>

George T. schreef:
> I need to access the serial port via python on a windows machine.
> Reading on the web, there are three solutions:  pyserial, siomodule and
> USPP.  pyserial seems to be the best option since the other two are
> tested with Windows 95 and older versions of python.  Would you agree
> with this or have I missed an option?

I hadn't even heard of siomodule and USPP; pyserial is what I use when I 
need to read/write from/to the serial port.

> Can anyone provide me an example of how to access the serial port with
> pyserial?

It's quite simple; there are a number of examples on pyserial's website. 
Here's a small quick and dirty script that reads data from a serial port 
and broadcasts it as UDP over the network to make the incoming data 
available to other computers in the office:

import socket
import sys

import serial

ser = serial.Serial('COM1', 38400, timeout=1)
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
while True:
     msg = ser.readline()
     sock.sendto(msg, ('<broadcast>', 5000))
     sys.stdout.write(msg)


Basically you can use the objects like other file-like objects.


-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From sybrenUSE at YOURthirdtower.com.imagination  Tue Feb 21 17:43:55 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Tue, 21 Feb 2006 23:43:55 +0100
Subject: Video.
References: <bAMKf.4037$UN.840@newsread2.news.pas.earthlink.net>
Message-ID: <slrndvn5tb.bv5.sybrenUSE@schuimige.unrealtower.org>

Dr. Pastor enlightened us with:
> What environment,library,product should I import or study to
> manipulate cameras, video, fire-wire, avi files?

That depends on what you want with it. Without more information I'd
say "transcode"

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From nospam at me.invalid  Sat Feb 18 17:05:59 2006
From: nospam at me.invalid (anthonyberet)
Date: Sat, 18 Feb 2006 22:05:59 +0000
Subject: 2-dimensional data structures
In-Reply-To: <mailman.1110.1138311076.27775.python-list@python.org>
References: <43ss7mF1n4eg5U1@individual.net>
	<mailman.1110.1138311076.27775.python-list@python.org>
Message-ID: <45pk2dF7o7egU1@individual.net>

Tim Chase wrote:
>> I want to work on a sudoku brute-forcer, just for fun.
> 
> 
> Well, as everybody seems to be doing these (self included...), the 
> sudoku solver may become the "hello world" of the new world :)
> 
>> What is the equivalent way to store data in python? - It isn't obvious 
>> to me how to do it with lists.
> 
> 
> Several other answers have crossed the list.  I've done it using a 
> dictionary of tuples:
> 
>     grid = {}
>     for row in range(1,10):
>         for col in range(1,10):
>             grid[(row,col)] = value
> 
>     item = grid[(3,2)]
> 
> etc.
> 
> Seemed fairly quick and worked for me.
> 
Thanks for the advice (to everyone in the thread).
I think I will go with nested lists.
However, I am running into a conceptual problem.
My approach will be firstly to remove all the impossible digits for a 
square by searching the row and column for other occurances.

However, I wondering how to approach the search of the nine regions of 
the grid. I am thinking of producing another nested list, again 9x9 to 
store the contents of each region, and to update this after each pass 
through -and update of- the main grid (row and column).

I am not sure how to most efficiently identify which region any given 
square on the grid is actually in - any thoughts, for those that have 
done this? - I don't want a massive list of IF conditionals if I can 
avoid it.




From mrstephengross at hotmail.com  Mon Feb 20 15:24:34 2006
From: mrstephengross at hotmail.com (mrstephengross)
Date: 20 Feb 2006 12:24:34 -0800
Subject: Building python 2.4.2 on Cygwin
Message-ID: <1140467074.739405.163440@g44g2000cwa.googlegroups.com>

Ok, I'm working on building python 2.4.2 on cygwin. I *think* it's
version 3.0 or 3.1 (is there a quick way to find out what version of
cygwin is running within a shell?)

Anyway, it appears to 'configure' fine, but gcc reports a compile error
when it gets to posixmodule.c. Here's the first few lines of the error
message:

==============================
gcc -fno-strict-aliasing -DNDEBUG -g -O3 -Wall -Wstrict-prototypes -I.
-I./Include  -DPy_BUILD_CORE  -c ./Modules/posixmodule.c -o
Modules/posixmodule.o
Modules/posixmodule.c:308: warning: function declaration isn't a
prototype
Modules/posixmodule.c: In function `posix_ttyname':
Modules/posixmodule.c:1162: warning: implicit declaration of function
`ttyname'
Modules/posixmodule.c:1162: warning: assignment makes pointer from
integer without a cast
Modules/posixmodule.c: In function `posix_mkdir':
Modules/posixmodule.c:1791: too many arguments to function `mkdir'
==============================

I've researched this a bit, and it sounds like cygwin gets all confused
about system includes and so on. Is there a good, comprehensive
explanation somewhere of how to make this all work? (Most of the
threads I've found are helpful, but not complete unfortunately).

Thanks,
--Steve (mrstephengross at hotmail.com)



From adamm_n0 at spamm_blic.net  Tue Feb 28 10:48:02 2006
From: adamm_n0 at spamm_blic.net (Mladen Adamovic)
Date: Tue, 28 Feb 2006 16:48:02 +0100
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <dtvdpc$9r6$1@wake.carmen.se>
References: <dtl9ad$35h$1@sea.gmane.org> <dtlat7$80c$1@sea.gmane.org>
	<mailman.2376.1140733288.27775.python-list@python.org>
	<dtljre$f8i$1@newsreader3.netcologne.de>
	<dtn5l2$nhr$1@newsreader3.netcologne.de>
	<dtqpkl$kbo$1@newsreader3.netcologne.de>
	<*firstname*nlsnews-46208F.13454626022006@news.verizon.net>
	<dtt0qf$ete$1@newsreader3.netcologne.de>
	<dtvdpc$9r6$1@wake.carmen.se>
Message-ID: <du1r6u$dac$1@ariane.blic.net>

Magnus Lycka wrote:
> On Windows that it. At least on Linux and Solaris, time.clock() returns
> CPU time. If time.clock() returns significantly different values before
> and after time.sleep(1), there's something seriously broken in sleep on
> such platforms.

No!
When process run the sleep, the operating system give other processes to 
run and it takes time (so called time slice)  to get back to the 
original process.

Recently I invoked Runtime.sleep() from Java on Centos 4.2 and it might 
take up to 1 sec(!) to come from the sleep no matter what you put as the 
sleep parameter.

Basically each process runs for around 20ms and then the other process 
get priority. I'm not sure why those Codecs run OK when I watch DVD 
movie while running other Java application which use processor and hard 
disc quite intensivly, it seems that they got slices regulary, I'm not 
sure way.

So, once more when you go to "sleep" other process get the slice so it 
could take more time then predicted to continue.

-- 
Mladen Adamovic
http://home.blic.net/adamm
http://www.shortopedia.com
http://www.froola.com


From artur_spruce at yahoo.com  Sat Feb 11 14:40:18 2006
From: artur_spruce at yahoo.com (AdSR)
Date: 11 Feb 2006 11:40:18 -0800
Subject: Rethinking the Python tutorial
In-Reply-To: <1139590229.811612.79580@g44g2000cwa.googlegroups.com>
References: <dsfqv4$shc$1@wake.carmen.se>
	<1139590229.811612.79580@g44g2000cwa.googlegroups.com>
Message-ID: <1139686818.578066.41850@o13g2000cwo.googlegroups.com>

I think you guys are up to something. We need some way to aggregate,
update, and extend not just tutorials but all kinds of informatory
material on Python. The Python Wiki is a good place for all that,
although it hasn't become anything resembling a Wikipedia so far.

AdSR



From bonono at gmail.com  Tue Feb 14 22:58:48 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 14 Feb 2006 19:58:48 -0800
Subject: How to cat None
In-Reply-To: <59xIf.16847$CZ4.13956@trnddc05>
References: <59xIf.16847$CZ4.13956@trnddc05>
Message-ID: <1139975928.700808.210850@g47g2000cwa.googlegroups.com>

Seems that what you want to do is to create a string in the form of :

"55Init=Init\n55First=first\n55Last=Last\n55Alias=None"

for each dictionary. If that is the case, may be you can try this :

"\n".join("%s=%s" % x for x in user1.iteritems())

Note that you cannot control the ordering of the keys when iterating a
dict which may or may not be a concern for you.

LittlePython wrote:
> I found out the hard way that I can not cat None. I get an error. Is there a
> simple way to cat None without doing some kind of equation  ( if this then
> that). Is there a isNone() somewhere. I am not too sure I know what None
> really means.
>
> I include an example to show what I am talking about in case I am alittle
> confused.
>
>
>
>
> from easygui import *
> import string
>
> msgbox('Starting Program')
>
> thisfile = fileopenbox(msg='Choose the correct File', title='Matrix Input
> File')
> input = file(thisfile,'r')
>
> header = string.split(string.strip(input.readline()),',')
> header.extend(['55FirstName',
> '55Intial','55LastName','55Alias',])
>
> all = input.readlines()
> input.close
> input = None
> matrix = {}
> for user in all:
>     user1 = string.split(string.strip(user),',')
>     user1.extend(['None']*4)    <-------------------------I would like to
> None  or better NULL this instead of string it
>     user1 = dict(zip(header,user1))
>     matrix[user1['OldNTLogon']] = user1
>
> mychoice = choicebox(choices=matrix.keys())
> user1 = matrix[mychoice]
>
> alltogether = ''
>
> for KeyName in user1.keys():
>     if alltogether == '':
>         alltogether = KeyName + '=' + '  ' + user1.get(KeyName) + '\n'
>     else:
>         alltogether = alltogether + KeyName + '=' + user1.get(KeyName) +
> '\n'  <------- error 'can not cat None with a str' or something like that
>
> msgbox(alltogether,'User Matrix for '+ mychoice )
> 
> msgbox('The End')



From erniedude at gmail.com  Tue Feb  7 10:25:11 2006
From: erniedude at gmail.com (Ernesto)
Date: 7 Feb 2006 07:25:11 -0800
Subject: * 'struct-like' list *
In-Reply-To: <dsacuv$gde$1@news2.rz.uni-karlsruhe.de>
References: <1139245389.529742.317110@g43g2000cwa.googlegroups.com>
	<1139279974.075753.299710@g14g2000cwa.googlegroups.com>
	<1139323814.071618.109950@z14g2000cwz.googlegroups.com>
	<dsacuv$gde$1@news2.rz.uni-karlsruhe.de>
Message-ID: <1139325911.432266.265140@g44g2000cwa.googlegroups.com>

Thanks !



From zzhikang at hotmail.com  Wed Feb 22 01:49:42 2006
From: zzhikang at hotmail.com (kanchy kang)
Date: Wed, 22 Feb 2006 06:49:42 +0000
Subject: May i customize basic operator (such as 1==3)?
In-Reply-To: <43FC084A.6010407@holdenweb.com>
Message-ID: <BAY108-F3094FEC32DBC95A5CD03A1CDFD0@phx.gbl>

Thank you for your suggestions!


>From: Steve Holden <steve at holdenweb.com>
>To: kanchy kang <zzhikang at hotmail.com>
>CC: python-list at python.org
>Subject: Re: May i customize basic operator (such as 1==3)?
>Date: Wed, 22 Feb 2006 01:44:26 -0500
>
>kanchy kang wrote:
>>many people write test cases with python scripts.
>>in these test scripts, there are many validation statements,
>>for example, in unittest, failUnless(a == b),(a/b may be stringType or 
>>intType...)
>>
>>during running test scripts, if there is one exception raised from 
>>failUnless, i still do not know a =?, b= ?... i have to add one statment 
>>"print a" or "print b" again...
>>
>>as i know, there are many validation statements if using python as one 
>>test tool...
>>i think my suggestion or requirement may benefit users greatly...
>>
>A test framework will contain many tests for equality that have nothing to 
>do with the tests themselves. So the real answer to this problem is to have 
>the tests be more explicit when they need to be. A testEqual(a, b) test 
>function would seem to be a more sensible approach than radical surgery on 
>the interpreter. The function can then print its arguments if they turn out 
>to be unequal.
>
>Otherwise there would have to be some *very* selective mechanism to decide 
>when the comparison arguments were printed out.
>
>regards
>  Steve
>--
>Steve Holden       +44 150 684 7255  +1 800 494 3119
>Holden Web LLC                     www.holdenweb.com
>PyCon TX 2006                  www.python.org/pycon/

_________________________________________________________________
FREE pop-up blocking with the new MSN Toolbar ? get it now! 
http://toolbar.msn.click-url.com/go/onm00200415ave/direct/01/



From silverburgh.meryl at gmail.com  Sun Feb 26 15:07:53 2006
From: silverburgh.meryl at gmail.com (silverburgh.meryl at gmail.com)
Date: 26 Feb 2006 12:07:53 -0800
Subject: How can I find the remainder when dividing 2 integers
Message-ID: <1140984473.723258.70050@e56g2000cwe.googlegroups.com>

I have a string array:
colors = ["#ff0000", "#00FF00", "#0000FF"]
colorIndex = 0;

and I want to loop thru each element of colors

 for str in strings:
 print colors[colorIndex++ % colors.length]


But i get an invalid syntax error when I execute the script:
    print colors[colorIndex++ % colors.length]
                              ^
SyntaxError: invalid syntax



From paul at boddie.org.uk  Thu Feb 16 09:13:31 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 16 Feb 2006 06:13:31 -0800
Subject: Embedding an Application in a Web browser
References: <1139930045.408507.151440@g43g2000cwa.googlegroups.com>
	<1140004056.893486.291280@g44g2000cwa.googlegroups.com>
	<1140005817.698597.135220@z14g2000cwz.googlegroups.com>
	<1140038488.546531.63630@z14g2000cwz.googlegroups.com>
Message-ID: <1140099211.490854.293950@g47g2000cwa.googlegroups.com>

Atanas Banov wrote:
> paron wrote:
> > I forgot -- I like the idea of Kerrigell, too. It runs on top of
> > CherryPy, and lets you use python either in the server (which is just a
> > little program on your local machine) or embedded in the html pages, or
> > in a Kerrigell service, which is an application server based on Python.
>
> oh sure, why make it simple, when we can make it difficult?!

I don't see how running a local Web application server is more
difficult than messing around with ActiveX and/or Active Scripting (or
whatever it's called). Remember that Python already has various HTTP
server classes in the standard library, and making use of these classes
is very easy. I'd rather do that than touch ActiveX with a very long
stick, and the Active Scripting stuff, whilst amusing, is a known
security concern.

> your solution is like using a sledgehammer to crack a nut!
>
> "... I keep hearing the sound of nuts being pulverized..."
> http://www.bobcongdon.net/blog/2005/11/java-sledgehammer.html

Why am I not surprised that the first three words of the quoted blog
article are "David Heinemeier Hansson"? Few people contributing to
comp.lang.python would suggest J2EE as a solution here, so I don't
quite see what relevance this particular hype echo from the blogosphere
has in this case, especially since running BaseHTTPServer isn't exactly
like running JBoss.

Sure, to have animated graphics is likely to stretch any Web-based
interface, despite recent support for things like SVG and
"destandardised" innovations like canvases in Web browsers. But if
cross-platform portability ever becomes an issue, the vanilla Web
application option is quite possibly the best route; whilst one can
embed Python in Konqueror with the right packages today, and whilst
support for Python scripting in Mozilla is coming along, it'll be a
long time before any piece of Python code will be able to run on more
than one of these configurations without modification. And beyond
Active Scripting, who can really be sure what Internet Explorer will
eventually support?

Paul



From lycka at carmen.se  Wed Feb  1 02:52:22 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 01 Feb 2006 08:52:22 +0100
Subject: triple quoted strings as comments
In-Reply-To: <1138667355.631379.249770@o13g2000cwo.googlegroups.com>
References: <1138667355.631379.249770@o13g2000cwo.googlegroups.com>
Message-ID: <drppbn$3rg$1@wake.carmen.se>

dmh2000 wrote:
> I recently complained elsewhere that Python doesn't have multiline
> comments. 
It seems you have a bad editor if it can't conveniently
add and remove comment markers for arbitrary blocks in
your source. (Maybe you just didn't find this feature.)

That every comment line begins with a special symbol just
adds clarity. It's a bonus.  C++ introduced // as comment
symbol for this purpose (but was stuck with /* and */ due
to backward compatibility reasons).  Ada, while otherwise
similar to Pascal, adopted -- to end of row instead of (*
and *) etc.

An editor that adds/removes '# ' in the beginning of each
marked line is fairly bullet proof. Adding e.g. /* to the
beginning of a block you want to comment out, & */ to the
end, breaks if you have /* */ style comments in the block!


From grante at visi.com  Wed Feb  8 13:44:28 2006
From: grante at visi.com (Grant Edwards)
Date: Wed, 08 Feb 2006 18:44:28 -0000
Subject: Replacing curses (Was: Re: Problem with curses and UTF-8)
References: <mailman.1566.1139345769.27775.python-list@python.org>
	<43E9234B.6030108@v.loewis.de>
	<mailman.1588.1139372460.27775.python-list@python.org>
	<11uk55h47lruk18@corp.supernews.com>
	<mailman.1611.1139422272.27775.python-list@python.org>
Message-ID: <11ukf0ci8d6ac64@corp.supernews.com>

On 2006-02-08, Ian Ward <ian at excess.org> wrote:
> Grant Edwards wrote:
>> Why not use termcap/terminfo?
>
> That's a good idea, but I'd have to wrap the c library myself,
> wouldn't I?

Probably.  I don't remember seeing a python module for them.

> Also, what happens when a user has an incorrect TERM setting
> (I've run into this before)

Then things (besides your program) won't work.

> I don't want to reimpliment all the nice speed optimizations
> that the curses library has, I just want something simple that
> should work for as many people as possible.

Depending on what you're tring to do, slang might be an option,
but I don't think there's a Python binding.  There is a
(largely unsupported) Python binding for the "newt" widget set
that runs on top of slang.  The old text-mode "red dialog
windows on a blue background" RedHat installer and admin apps
were written in Python using the newt widget library.  The
"newt" Python module is called "snack".

-- 
Grant Edwards                   grante             Yow!  DIDI... is that a
                                  at               MARTIAN name, or, are we
                               visi.com            in ISRAEL?


From jjl at pobox.com  Mon Feb 13 15:29:08 2006
From: jjl at pobox.com (John J. Lee)
Date: 13 Feb 2006 20:29:08 +0000
Subject: Yet another GUI toolkit question...
References: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
	<43ED6990.1020707@wordtech-software.com> <87u0b45c72.fsf@pobox.com>
	<200602131004.21766.phil@riverbankcomputing.co.uk>
Message-ID: <u8xsft33f.fsf@pobox.com>

Phil Thompson <phil at riverbankcomputing.co.uk> writes:

> On Monday 13 February 2006 12:33 am, John J. Lee wrote:
> > Kevin Walzer <sw at wordtech-software.com> writes:
> > [...]
> >
> > > Commercial Qt is a little out of my price range.
> >
> > Commercial *PyQt* (including a license for Qt for use only with PyQt)
> > is $400 (USD) per developer (plus an extra $300/year if you want
> > upgrades).  That's compared to Qt license for use *with C++* varying
> > from $1690 to $6260.  So PyQt is 4-15 times cheaper than old-fashioned
> > C++ Qt!
[...]
> > PyQt 4 now seems to exist, though not as a stable release yet, so I
> > imagine it'll be a bit longer untill there's a release of Blackadder
> > that supports Qt 4.  I recall the PyQt 2 --> PyQt 3 upgrade as being
> > fairly painless (in terms of code changes), though.
> 
> There will never be a release of Blackadder that supports PyQt4.

Will there be a licensing deal that allows commercial use of PyQt
cheaper than the standard Qt C++ licenses?


John



From timothy.williams at nvl.army.mil  Thu Feb 23 15:38:02 2006
From: timothy.williams at nvl.army.mil (timothy.williams at nvl.army.mil)
Date: 23 Feb 2006 12:38:02 -0800
Subject: MySQLdb slow on MySQL 5
In-Reply-To: <mailman.2364.1140721473.27775.python-list@python.org>
References: <1140716394.225560.27920@t39g2000cwt.googlegroups.com>
	<mailman.2364.1140721473.27775.python-list@python.org>
Message-ID: <1140727082.800917.44550@i40g2000cwc.googlegroups.com>


Gerhard H?ring wrote:
>
> Maybe you're running in autocommit mode. I. e. an implicit COMMIT is
> done for each insert. This slows any database down.
>
> Or are you calling commit() yourself too often?
>
> -- Gerhard

I'm not calling COMMIT at all. I'm using MyISAM tables. I'll check on
autocommit. Thanks.



From oliphant.travis at ieee.org  Thu Feb 16 20:54:27 2006
From: oliphant.travis at ieee.org (Travis E. Oliphant)
Date: Thu, 16 Feb 2006 18:54:27 -0700
Subject: calculating on matrix indices
In-Reply-To: <43F50D7F.8010108@bryant.edu>
References: <43F50D7F.8010108@bryant.edu>
Message-ID: <dt3acl$miv$1@sea.gmane.org>

Brian Blais wrote:
> Hello,
> 
> In my attempt to learn python, migrating from matlab, I have the following problem. 
> Here is what I want to do, (with the wrong syntax):
> 
> from numpy import *
> 
> t=arange(0,20,.1)
> x=zeros(len(t),'f')
> 
> idx=(t>5)
> tau=5
> x[idx]=exp(-t[idx]/tau)  # <---this line is wrong (gives a TypeError)

Hi Brian,

Just to let you know, you are more likely to get good answers by mailing 
numpy-discussions at lists.sourceforge.net then posting to this list.

The indexing technique you are using is actually fine.  The trouble you 
are having is that t is a double-precision array (and thus so is 
exp(-t[idx]/tau)  while x is a single-precision array.

Compare:

x.dtype.name
t.dtype.name

Because you are trying to store something with greater precision into an 
array with less precision you get a TypeError.

So, either change x to be double precision:

x = zeros(len(t), float)

#the default Python float is doubleprecision

or change t to be single precision:

t = arange(0,20,.1,dtype=single)

Good luck,

-Travis



From abhinavduggal at gmail.com  Thu Feb 16 00:56:52 2006
From: abhinavduggal at gmail.com (abhinav)
Date: 15 Feb 2006 21:56:52 -0800
Subject: web crawler in python or C?
Message-ID: <1140069412.051298.242150@g44g2000cwa.googlegroups.com>

Hi guys.I have to implement a topical crawler as a part of my
project.What language should i implement
C or Python?Python though has fast development cycle but my concern is
speed also.I want to strke a balance between development speed and
crawler speed.Since Python is an interpreted language it is rather
slow.The crawler which will be working on huge set of pages should be
as fast as possible.One possible implementation would be implementing
partly in C and partly in Python so that i can have best of both
worlds.But i don't know to approach about it.Can anyone guide me on
what part should i implement in C and what should be in Python?



From abhisek.datta at gmail.com  Fri Feb 17 10:11:23 2006
From: abhisek.datta at gmail.com (Abhisek Datta)
Date: Fri, 17 Feb 2006 15:11:23 +0000
Subject: RSA in python
In-Reply-To: <1140188570.989585.208760@o13g2000cwo.googlegroups.com>
References: <mailman.2057.1140187795.27775.python-list@python.org>
	<1140188570.989585.208760@o13g2000cwo.googlegroups.com>
Message-ID: <4e4a257e0602170711l55d6ce23i22915985bc369322@mail.gmail.com>

I tried the ezPyCrypto which is basically a higher level wrapper to pyCrypto
but it fails to import public key in PEM format.

-abhisek

On 17 Feb 2006 07:02:51 -0800, wittempj at hotmail.com
<martin.witte at gmail.com> wrote:
> Did you try this: http://www.amk.ca/python/code/crypto ?
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From benji at benjiyork.com  Mon Feb 20 13:03:30 2006
From: benji at benjiyork.com (Benji York)
Date: Mon, 20 Feb 2006 13:03:30 -0500
Subject: editor for Python on Linux
In-Reply-To: <dtcqa0$adv$1@ariane.blic.net>
References: <dtai6e$23m$2@ariane.blic.net> <dtcqa0$adv$1@ariane.blic.net>
Message-ID: <43FA0472.4010709@benjiyork.com>

Mladen Adamovic wrote:
> Answers like vi, emacs and gedit I won't take seriously.

I don't know anything about gedit, but why not take Emacs and Vim (not 
vi) seriously?

> I would like syntax highlighting, auto ident and if possible auto 
> completition and embedded help.

Both certainly give you those and *so* much more.
--
Benji York


From keith at nekotaku.com  Mon Feb 27 18:24:04 2006
From: keith at nekotaku.com (keith at nekotaku.com)
Date: Mon, 27 Feb 2006 16:24:04 -0700
Subject: MySQLdb compile error with AMD64
Message-ID: <20060227162404.805655b7c67e576280eebc9eec5e7522.81a5a9679f.wbe@email.email.secureserver.net>

Hi,

I have been using MySQLdb on a 32-bit processor, no worries. Love it.

I went to install on an AMD64 running the 64-bit version of SUSE 10.0.

I get the following error during the "python setup.py build"

gcc -pthread -fno-strict-aliasing -DNDEBUG -O2 -fmessage-length=0 -Wall
-D_FORTIFY_SOURCE=2 -g -fPIC -I/usr/include/mysql
-I/usr/include/python2.4 -c _mysql.c -o
build/temp.linux-x86_64-2.4/_mysql.o -I/usr/include/mysql -g
-march=i586 -mcpu=i686 -fmessage-length=0
`-mcpu=' is deprecated. Use `-mtune=' or '-march=' instead.
_mysql.c:1: error: CPU you selected does not support x86-64 instruction
set
_mysql.c:1: error: CPU you selected does not support x86-64 instruction
set
error: command 'gcc' failed with exit status 1

Any ideas on what I have to do to make this work?

Any help appreciated!

Cheers
Keith




From nick at craig-wood.com  Wed Feb 22 01:30:59 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Wed, 22 Feb 2006 00:30:59 -0600
Subject: Pyserial never read
References: <1140105936.408387.88130@z14g2000cwz.googlegroups.com>
	<1140219414.143448.234450@z14g2000cwz.googlegroups.com>
	<1140302110.028540.176210@g43g2000cwa.googlegroups.com>
	<slrndvm0sr.6k1.nick@irishsea.home.craig-wood.com>
	<mailman.2241.1140536285.27775.python-list@python.org>
Message-ID: <slrndvn1ad.he1.nick@irishsea.home.craig-wood.com>

Peter Hansen <peter at engcorp.com> wrote:
>  Nick Craig-Wood wrote:
> > luca72 <lucaberto at libero.it> wrote:
> > 
> >> Thanks for your help, but it don't solve the problem.
> >> I receive only the echo and full stop.
> > 
> > Try swapping pins 2 and 3 in the lead.
> 
>  Anything's possible, but given that in his original post he says it 
>  works when he uses Delphi, it seems unlikely making a change to the 
>  hardware is necessary.

Sorry missed that bit!

Pyserial works very well in my experience (under linux).

Serial ports are generally a pain though ;-)

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From steve at REMOVETHIScyber.com.au  Fri Feb 24 06:10:18 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 24 Feb 2006 22:10:18 +1100
Subject: Unexpected timing results
References: <pan.2006.02.23.15.38.11.944281@REMOVETHIScyber.com.au>
	<43FDDDB2.7050703@websafe.com>
	<pan.2006.02.23.22.04.04.778895@REMOVETHIScyber.com.au>
	<dtmijn$6uq$1@wake.carmen.se>
	<pan.2006.02.24.10.27.39.349356@REMOVETHIScyber.com.au>
	<xyBLf.276560$kl2.9034796@phobos.telenet-ops.be>
Message-ID: <pan.2006.02.24.11.10.18.403272@REMOVETHIScyber.com.au>

On Fri, 24 Feb 2006 10:51:09 +0000, Roel Schroeven wrote:

[snip]

> I think it looks like the problem is in the system call.

Thank you Roel for going the extra mile. I appreciate the unexpected bonus.


-- 
Steven.



From http  Tue Feb 14 03:32:18 2006
From: http (Paul Rubin)
Date: 14 Feb 2006 00:32:18 -0800
Subject: Splitting a string
References: <mailman.1883.1139903399.27775.python-list@python.org>
Message-ID: <7xd5hqqr1p.fsf@ruckus.brouhaha.com>

Nico Grubert <nicogrubert at gmail.com> writes:
> I'd like to split a string where 'and', 'or', 'and not' occurs.

Other people have suggested how to do this splitting.  But don't you
really want a parser?


From schreckmail at yahoo.com  Fri Feb 17 15:34:02 2006
From: schreckmail at yahoo.com (schreckmail at yahoo.com)
Date: 17 Feb 2006 12:34:02 -0800
Subject: A way to discover PIDs of child processes?
In-Reply-To: <donn-18AFE0.11371117022006@gnus01.u.washington.edu>
References: <1140198823.896123.221240@g44g2000cwa.googlegroups.com>
	<donn-18AFE0.11371117022006@gnus01.u.washington.edu>
Message-ID: <1140208442.726559.306460@g43g2000cwa.googlegroups.com>

Donn,

Your suggestion worked perfectly.  Thank you for showing me the forest
from the trees :-)



From durumdara at gmail.com  Tue Feb 21 05:05:09 2006
From: durumdara at gmail.com (Durumdara)
Date: Tue, 21 Feb 2006 11:05:09 +0100
Subject: Little tool - but very big size... :-(
In-Reply-To: <43FADD2F.8060601@gatwick.westerngeco.slb.com>
References: <43FAD9E3.5010004@gmail.com>
	<43FADD2F.8060601@gatwick.westerngeco.slb.com>
Message-ID: <43FAE5D5.5000309@gmail.com>

Dear Martin !

Thanx for it:

setup(
    options = {"py2exe": {"bundle_files": 1,   # <================ this 
help me !!!!!!!!!!!!
                          "compressed": 1,
                          "optimize": 2}},
    # The lib directory contains everything except the executables and 
the python dll.
    # Can include a subdirectory name.
    windows = [wxPyHDDirList],
    )

Can I increase level of the optimization ?
Can I increase level of the zip packing ?

Please help me: dd


Martin Franklin wrote:

>Durumdara wrote:
>  
>
>>Hi !
>>
>>I have a problem.
>>I have a little tool that can get data about filesystems and wrote it in
>>python.
>>
>>The main user asked me a GUI for this software.
>>
>>This user is needed a portable program, so I create this kind of the
>>software with Py2Exe.
>>
>>But it have very big size: 11 MB... :-(
>>
>>I need to have more compressed result. Can I compress dll-s, pyd-s with
>>Py2Exe ?
>>Can I decrease the total size with something ?
>>    
>>
>
>
>
>you could try UPX http://upx.sourceforge.net/ I think it will handle
>the .pyd and dll files (it did the last time I tested it)
>
>
>  
>
>>If not, how to I create an self-unpackager and self-starter program that
>>use an temporary directory in the disk ? With WinRar ?
>>    
>>
>
>I may be wrong (havn't used py2exe in a while) but I think it can now
>(again) create a single exe file?  Otherwise something like Inno Setup
>http://www.jrsoftware.org/isinfo.php or a simple self extracting zip
>file
>
>
>
>  
>
>>Thanx for help:
>>dd
>>
>>
>>
>>    
>>
>
>  
>



From steve at holdenweb.com  Sun Feb  5 22:34:38 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 06 Feb 2006 03:34:38 +0000
Subject: Learning Python
In-Reply-To: <ds5jo1$g98$1@aphrodite.grec.isp.9tel.net>
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>	<1139156577.897100.69140@g43g2000cwa.googlegroups.com>	<mailman.1439.1139157505.27775.python-list@python.org>	<1139158796.288778.244000@z14g2000cwz.googlegroups.com>	<ds5c0n$cej$2@aphrodite.grec.isp.9tel.net>	<1139159843.488988.279770@g43g2000cwa.googlegroups.com>	<1139160795.149427.120760@g44g2000cwa.googlegroups.com>	<ds5gun$8v6$1@apollon.grec.isp.9tel.net>	<1139166748.487806.175850@g44g2000cwa.googlegroups.com>
	<ds5jo1$g98$1@aphrodite.grec.isp.9tel.net>
Message-ID: <ds6g4c$oc9$1@sea.gmane.org>

Xavier Morel wrote:
> Byte wrote:
> 
>>I asked to keep it simple! Anyway, ill try Dive into Python, thanks
>>
> 
> It is simple, merely explicit and with some details.

It seemed to me a bit like an attempt to save a drowning man by opening 
a firehose on his mouth :-)

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From carsten at uniqsys.com  Mon Feb  6 14:59:10 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 06 Feb 2006 14:59:10 -0500
Subject: Replace a module variable with a function call
In-Reply-To: <1139254686.313598.282240@z14g2000cwz.googlegroups.com>
References: <1139252075.497468.137100@g44g2000cwa.googlegroups.com>
	<mailman.1514.1139252631.27775.python-list@python.org>
	<1139253593.106535.175310@g47g2000cwa.googlegroups.com>
	<mailman.1517.1139254453.27775.python-list@python.org>
	<1139254686.313598.282240@z14g2000cwz.googlegroups.com>
Message-ID: <1139255950.20263.39.camel@dot.uniqsys.com>

On Mon, 2006-02-06 at 14:38, gabriel.becedillas at gmail.com wrote:
> Your post didn't provide any help at all, it was a useless sarcastic
> post and I'm a very sensible person.

Your original question didn't provide enough detail to offer an answer,
which is why I asked the question what the dynamic return value should
depend on. I am sorry if my conjecture that the return value might
depend on the phase of the moon offended you, but my post was not meant
to be useless. It was a necessary follow-up question because you didn't
define your requirements clearly enough.

If the condition upon which the return value is determined can be
evaluated at import time and doesn't change henceforth, a simple if
statement in the module will serve your need.

If the value *really* needs to be re-evaluated every time the name is
looked up, you'll need to follow the advice that Tim Hochberg has
already given on this thread. Note, though, that that won't prevent the
user code from caching the return value and circumventing the
re-evaluation.

-Carsten




From petr at tpc.cz  Wed Feb 22 12:04:09 2006
From: petr at tpc.cz (Petr Jakes)
Date: 22 Feb 2006 09:04:09 -0800
Subject: Pyserial never read
In-Reply-To: <1140599901.082142.262540@f14g2000cwb.googlegroups.com>
References: <1140105936.408387.88130@z14g2000cwz.googlegroups.com>
	<1140219414.143448.234450@z14g2000cwz.googlegroups.com>
	<1140302110.028540.176210@g43g2000cwa.googlegroups.com>
	<slrndvm0sr.6k1.nick@irishsea.home.craig-wood.com>
	<mailman.2241.1140536285.27775.python-list@python.org>
	<slrndvn1ad.he1.nick@irishsea.home.craig-wood.com>
	<1140599901.082142.262540@f14g2000cwb.googlegroups.com>
Message-ID: <1140627849.046017.301060@g47g2000cwa.googlegroups.com>

Well, I think it is better to start with some simple code first.
Try to read serial port and print it out.
something like this could work:

import serial

s = serial.Serial(port=2,baudrate=38400, timeout=20)

while 1:
    print s.readline()

Petr Jakes



From lycka at carmen.se  Fri Feb 24 12:14:48 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 24 Feb 2006 18:14:48 +0100
Subject: datetime iso8601 string input
In-Reply-To: <1140793313.542526.124790@i40g2000cwc.googlegroups.com>
References: <1140714826.044272.253460@t39g2000cwt.googlegroups.com>
	<dtmjh7$97t$1@wake.carmen.se>
	<1140786439.054438.32080@u72g2000cwu.googlegroups.com>
	<mailman.2399.1140791499.27775.python-list@python.org>
	<1140793313.542526.124790@i40g2000cwc.googlegroups.com>
Message-ID: <dtneu9$6r8$1@wake.carmen.se>

Rubic wrote:
> Yeah, it's a trivial function that's rewritten for each new project
> that passes datetime objects as strings <0.2 wink>.  On the basis of it
> being a trivial convenience, I could propose removing hundreds of
> "redundant" functions from the library.  ;-)

I think the big issue is that it solves such a microscopic part
of the convert-strings-to-datetimes problem. Believe me, I know,
I'm writing parsers for IATA timetable data now. There is a
distinct smell of punch cards, telex machines and handwritten
forms in this standard... Like writing 112233 instead of 2006-
02-11 22:33, and let the parser guess month and year from context.

If I have gotten a time into a datetime object I'll keep it there
if I'm in control. If I'm not in control, I'd be very lucky if
the string replresentation was in the One True Format.

Since I feel that the datetime module largely replaces the
older time module, I'd really like to see a strptime in the
datetime module though. Then I guess I could often drop use of
the old time module. (If it wasn't for the sad fact that we need
to support Python 2.2 a little longer...)


From donn at drizzle.com  Mon Feb 20 13:42:28 2006
From: donn at drizzle.com (Donn Cave)
Date: Mon, 20 Feb 2006 18:42:28 -0000
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<yfsmzgmne6k.fsf@oc.ex.ac.uk>
Message-ID: <1140460947.608734@jetspin.drizzle.com>

Quoth Alexander Schmolck <a.schmolck at gmail.com>:
| Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> writes:
...
|> bash is a scripting language for *n*x systems. javascript is a scripting
|> language for web browsers. VBScript is a scripting language for MS
|> applications.
|
| Python is also a scripting language for *n*x systems and various applications.
|  
|> A scripting languagee is a language whose main purpose is to be embbeded in an
|> application to provide the user a way of programmaticaly automate some tedious
|> tasks.
|
| A few lines ago bash was also a scripting language but I can't personally
| recall ever seeing bash embedded in some application.

UNIX!  The Bourne shell is exactly what M Desthuillers describes, for
the UNIX operating system.  Python isn't at all - not that you can't
rename a file, change working directory, execute some processes and do
all that stuff from pure Python, but there's a clear difference in focus.
Those things the shell does rather well, at anything else it's pathetic.

Of course, scripting is naturally the domain of interpreted languages,
and most scripts are trivial in size and complexity.  I guess this is
why for some people, "scripting language" just means "interpreted and
suited to writing trivial programs."  It's hard to believe they're
thinking very hard about what they're saying, but so what's new?

	Donn Cave, donn at drizzle.com


From duncanm255 at hotmail.com  Thu Feb 16 23:31:59 2006
From: duncanm255 at hotmail.com (D)
Date: 16 Feb 2006 20:31:59 -0800
Subject: Open Relay Test
Message-ID: <1140150719.298606.9710@g44g2000cwa.googlegroups.com>

Hi all .. how could one test to see if an open relay exists on a
specific email server?



From cam.ac.uk at mh391.invalid  Sat Feb 25 01:53:36 2006
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sat, 25 Feb 2006 06:53:36 +0000
Subject: python-list/python-dev quoting style
In-Reply-To: <dtoti4$nmj$1@panix3.panix.com>
References: <dtml9t$367$1@gemini.csx.cam.ac.uk> <dtnjdt$n9q$1@panix2.panix.com>
	<dto7um$ils$1@gemini.csx.cam.ac.uk> <dtoti4$nmj$1@panix3.panix.com>
Message-ID: <dtouti$327$1@gemini.csx.cam.ac.uk>

[me]
>>>>Does anyone have a script to convert more conventional USENET quoting 
>>>>style... to the commonly used python-dev/python-list style...

[me]
>>I think this style is *much* clearer and cleaner. It does require a
>>lot more hand editing though, although this encourages more judicious
>>quoting.

[Aahz]
> It requires enough effort that I either skip it or don't respond.  Keep
> that in mind if you want people to respond to your posts.

Perhaps, but if doing so will make it easier for, say, Tim Peters to 
respond to my post, you choosing not to respond is a burden I will have 
to bear.

 > I also notice many people trimming too much context.

I notice this too. Also people trimming not enough. With any means of 
quoting.

 > And who is "me", anyway?

It's hard to believe that you don't understand who "me" is in a 
conversation between two people, one of whom is identified as "Aahz" and 
is attributed words you yourself wrote.
-- 
Michael Hoffman


From felipe.lessa at gmail.com  Sat Feb 18 07:46:18 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sat, 18 Feb 2006 10:46:18 -0200
Subject: [ANN] Movable python Trial Version
In-Reply-To: <1140265482.657543.193060@z14g2000cwz.googlegroups.com>
References: <1140265482.657543.193060@z14g2000cwz.googlegroups.com>
Message-ID: <1140266778.5255.5.camel@kenshin>

Em S?b, 2006-02-18 ?s 04:24 -0800, Fuzzyman escreveu:
> It is set to expire on the 22nd May, and displays a nag screen on
> startup. Other than that, it is the full version. Have fun.

Attached is the cracked version with no expiration limit and my own
bitmap on the startup. Enjoy!

> Fuzzyman
> http://www.voidspace.org.uk/python/index.shtml

Just kidding ;-),
Felipe.

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From userprogoogle-139 at yahoo.co.uk  Thu Feb 16 11:20:30 2006
From: userprogoogle-139 at yahoo.co.uk (rodmc)
Date: 16 Feb 2006 08:20:30 -0800
Subject: MySQL
References: <1140094071.287878.55580@f14g2000cwb.googlegroups.com>
	<dt1sro$t0n$1@ork-un.noris.net>
Message-ID: <1140106829.983287.8730@g14g2000cwa.googlegroups.com>

Hi Wolfram,

Thanks for the tip, after some server issues I am pleased to say the
library appears to work perfectly with MySQL 5. 

Best,

rod



From lists at fabis-site.net  Tue Feb 28 06:19:54 2006
From: lists at fabis-site.net (Fabian Steiner)
Date: Tue, 28 Feb 2006 12:19:54 +0100
Subject: Printing a file
Message-ID: <du1bkn$56r$00$1@news.t-online.com>

Hello!

I am currently working on an application where the user is able to 
create new worksheets and to delete existing ones. All of these 
worksheets have the same structure (--> template?), only some values 
should be changed. A minimal example would be something like this:

Name: ...........
Role: ............
Address: ............

The values are stored in a SQLite database. Now I would like to offer 
the possibility to print out a single record on a DinA4 paper. In order 
to do this, the dots (...) above of course have to be replaced by the 
current record's values and the different parts have to fit on one page.

Unfortunately I don't know how to realize this, since also some images 
and different boxes should be printed out. As the whole application is 
based on QT, QPrinter might be used, but I couldn't find any examples 
how to use it.

What do you suggest? Which format should the template have? (XML, etc.?)

Any hints appreciated!

Cheers,
Fabian Steiner


From pietro.campesato at gmail.com  Thu Feb 16 16:42:17 2006
From: pietro.campesato at gmail.com (Pietro Campesato)
Date: 16 Feb 2006 13:42:17 -0800
Subject: Evil, evil wxPython (and a glimmer of hope)
In-Reply-To: <1140116551.116322.12680@g43g2000cwa.googlegroups.com>
References: <1140116551.116322.12680@g43g2000cwa.googlegroups.com>
Message-ID: <1140126137.851131.172230@g47g2000cwa.googlegroups.com>

As you just said, wxPython is "...(a simple wrapper for a C++
toolkit)": it is
oriented toward the C++ style/mindset.



From xavier.morel at masklinn.net  Thu Feb 16 20:34:07 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Fri, 17 Feb 2006 02:34:07 +0100
Subject: define loop statement?
In-Reply-To: <bvp9v1tjvebinb894vhrlu7n26euh3l73o@4ax.com>
References: <lW4Jf.31559$3V4.8390@trnddc06>
	<bvp9v1tjvebinb894vhrlu7n26euh3l73o@4ax.com>
Message-ID: <dt391c$a30$1@aphrodite.grec.isp.9tel.net>

Rene Pijlman wrote:
> David Isaac:
>> I would like to be able to define a loop statement
>> (nevermind why) so that I can write something like
>>
>> loop 10:
>>    do_something
>>
>> instead of
>>
>> for i in range(10):
>>    do_something
>>
>> Possible?  If so, how?
> 
> Yes. By implementing a compiler or an interpreter for your programming
> language. Or a preprocessor that converts your language to Python, or some
> other suitable intermediate language. Or a programmer, that converts your
> pseudocode and some coffee to the desired algorithm :-)
> 
Or by hacking through the Python source and creating his own "somehow 
pythonish but absolutely not python" language


From mhellwig at xs4all.nl  Thu Feb  9 08:32:38 2006
From: mhellwig at xs4all.nl (Martin P. Hellwig)
Date: Thu, 09 Feb 2006 14:32:38 +0100
Subject: Hi reliability files, writing,reading,maintaining
In-Reply-To: <fhGGf.274074$vl2.129103@fe2.news.blueyonder.co.uk>
References: <fhGGf.274074$vl2.129103@fe2.news.blueyonder.co.uk>
Message-ID: <43eb4480$0$11064$e4fe514c@news.xs4all.nl>

John Pote wrote:
<cut>
> So my request:
> 1. Are there any python modules 'out there' that might help in securely
> writing such files.
> 2. Can anyone suggest a book or two on this kind of file management. (These
> kind of problems must have been solved in the financial world many times).
> 
<cut>
I can't answer your specific questions but I got the feeling that you're 
  barking at the wrong tree ;-)

You don't want to solve this in you application, file management is what 
the OS and hardware is about. "Military" grade solutions are often 
(depending on their criticalness) double or triple hot spares in the 
same room which can be seen as a "unit" and these units are duplicated 
on remote locations (at least 25km of each other) syncing their data 
with standard tools like rsync.

If you don't have military budget, I would suggest to do it a little 
less expensive, like having a couple of Solaris machines (three or four 
will do it) in the same room, using a part of their diskspace for ZFS.

Then let your application write your data to that ZFS partition and if 
you are particular paranoid you can build in a checksum that can be 
calculated by other machines without the need for the original received 
data (ZFS has a built-in mechanism for that so you might just want to 
call that).

There is nothing wrong for assuming a certain level of hardware, well at 
least not if its very clearly communicated to all parties.
ZFS is open source (by SUN) but currently only implemented in Solaris, 
which you also can (commercially) use without charge.

Now you only got to figure out how to implement a heartbeat mechanism 
between you fail-over applications :-)

-- 
mph


From siddharthdave84 at gmail.com  Sat Feb 18 01:02:23 2006
From: siddharthdave84 at gmail.com (al pacino)
Date: 17 Feb 2006 22:02:23 -0800
Subject: GDI in python>?
Message-ID: <1140242543.204760.174390@g44g2000cwa.googlegroups.com>

hi,

is it possible to address the  'screen pixels' using python , like
analogous to older dos( functions that graphics.h provides') or win api
calls for gdi.

what i want is to display clusters (in differetn colours) on screen
using python.

thanks.



From jm.suresh at gmail.com  Tue Feb 21 02:14:52 2006
From: jm.suresh at gmail.com (Suresh Jeevanandam)
Date: Tue, 21 Feb 2006 12:44:52 +0530
Subject: Mutable numbers
Message-ID: <dteele$9pi$1@home.itg.ti.com>

# I am new to python.

In python all numbers are immutable. This means there is one object ( a 
region in the memory ) created every time we do an numeric operation. I 
hope there should have been some good reasons why it was designed this way.

But why not have mutable numbers also in the language. A type which 
would behave as follows:

a = MutableInt(12)
b = a

Now both a and b should refer to the same memory location. Any change in 
the object should get reflected in all the references.

a.assign(13) # Same memory location should be updated with value 13, b 
is also 13 now.

Now we can further optimize:

a.incrementOne() # equivalent to a++ in C++
a.decrementOne()

and the augmented assignment operation also could be made optimized.

In any application most of the operation is numerical. So, i think, we 
should get a good speed advantage with the availability of mutable 
numbers. What do you think ?

regards,
Suresh


From rabkin at mweb[DOT]co[DOT]za  Sun Feb 19 11:15:31 2006
From: rabkin at mweb[DOT]co[DOT]za (Max)
Date: Sun, 19 Feb 2006 18:15:31 +0200
Subject: Should we still be learning this?
In-Reply-To: <FYCdnYtvV8-cvmreRVn-gQ@comcast.com>
References: <xuGdnQRiLabDiGrenZ2dnUVZ_tWdnZ2d@is.co.za>
	<FYCdnYtvV8-cvmreRVn-gQ@comcast.com>
Message-ID: <85udnRJPNp8_BGXeRVn-uw@is.co.za>

John Zenger wrote:
> Don't overly concern yourself with your course being 100% up to date. 
> When learning programming, the concepts are what is important, not the 
> syntax or libraries you happen to be using.  Even if they were to teach 
> you the latest and greatest features of 2.4.2, that would be out of date 
> in a few months/years when the next version comes along and the Python 
> gods decide to deprecate the entire os module or something.
> 

All of us know how to program: the idea is that those who got more than 
70% for Java in high school can learn a second language instead of doing 
Java all over again.

> 
> And BTW, map and filter are such useful concepts that it makes sense to 
> teach them to students even if they will one day be deprecated in 
> Python.  If you want to teach yourself Haskell or a Lisp dialect (and 
> you should!), knowing those concepts will come in very handy.
> 

True. But I think list comprehensions are also damn useful (and AFAIR, 
Haskell has them too).

I already know some Scheme (I've played the "game" Lists And Lists, a 
Scheme tutorial, and used the GIMP's script-fu). I have tried to learn 
Haskell, but - though I think I understand everything I read on it - I 
can't get my programs to run.

--Max


From finite.automaton at gmail.com  Fri Feb 10 19:33:37 2006
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 10 Feb 2006 16:33:37 -0800
Subject: any way to customize the is operator?
References: <1138342643.119111.281900@g14g2000cwa.googlegroups.com>
	<mailman.1123.1138346366.27775.python-list@python.org>
	<1138346774.949296.192520@g14g2000cwa.googlegroups.com>
	<pan.2006.01.27.11.01.46.829464@REMOVETHIScyber.com.au>
Message-ID: <1139618017.571180.23790@g47g2000cwa.googlegroups.com>

> Why did you want to customize "is"?

Well, mostly out of principle ;-)

But also because I'm wrapping a C library which passes around C structs
which are wrapped in shim C++ classes for a Boost.Python layer.  Boost
Python does a marvelous job of translating between Python and C++ data
types; when a C structure is returned, it magically translates that
structure into a Python wrapper.   The problem is that a _new_ Python
wrapper is created every time a pointer is returned, even if a  wrapper
already exists for that particular pointer.

To illustrate:  Suppose you have a function in C++ which is a simple
identity function, e.g.

template <typename T>
T *identity (T *x) {
    return x;
}

Calling the wrapped version of this function from Python will produce a
Python wrapper which represents the same underlying C++ object, but is
not actually the same Python object:

>>> b = identity(a)
>>> b is a
False

I wanted to override the behavior of "is" so that (a is b) would be
True --- which shouldn't have caused a problem, since the wrapper
class's attributes are read-only from Python.  As it is, I've overriden
__cmp__ and __hash__, so at least I get the correct dictionary behavior

>>> mydict = { a : 'something' }
>>> b = identity(a)
>>> b in mydict
True

It's quite possible that there is some way to do this correctly from
the Boost.Python side of things... my understanding of how to use
Boost.Python is minimal.



From __peter__ at web.de  Tue Feb 14 10:17:08 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 14 Feb 2006 16:17:08 +0100
Subject: 88k regex = RuntimeError
References: <1139900873.361930.135880@g44g2000cwa.googlegroups.com>
	<dssd1p$spr$02$1@news.t-online.com>
	<1139927866.369896.166310@g47g2000cwa.googlegroups.com>
Message-ID: <dsss6f$q6p$03$1@news.t-online.com>

Tim N. van der Leeuw wrote:

> This is basically the same idea as what I tried to describe in my
> previous post but without any samples.
> I wonder if it's more efficient to create a new list using a
> list-comprehension, and checking each entry against the 'wanted' set,
> or to create a new set which is the intersection of set 'wanted' and
> the iterable of all matches...
> 
> Your sample code would then look like this:
> 
>>>> import re
>>>> r = re.compile(r"\w+")
>>>> file_content = "foo bar-baz ignored foo()"
>>>> wanted = set(["foo", "bar", "baz"])
>>>> found = wanted.intersection(name for name in r.findall(file_content))

Just

found = wanted.intersection(r.findall(file_content))

>>>> print found
> set(['baz', 'foo', 'bar'])
>>>>
> 
> Anyone who has an idea what is faster? (This dataset is so limited that
> it doesn't make sense to do any performance-tests with it)

I guess that your approach would be a bit faster though most of the time
will be spent on IO anyway. The result would be slightly different, and
again yours (without duplicates) seems more useful. 

However, I'm not sure whether the OP would rather stop at the first match or
need a match object and not just the text. In that case:

matches = (m for m in r.finditer(file_content) if m.group(0) in wanted)

Peter


From bradfordh at gmail.com  Tue Feb  7 21:51:06 2006
From: bradfordh at gmail.com (Tempo)
Date: 7 Feb 2006 18:51:06 -0800
Subject: HTML page into a string
Message-ID: <1139367066.060542.62260@g14g2000cwa.googlegroups.com>

In my last post I received some advice to use urllib.read() to get a
whole html page as a string, which will then allow me to use
BeautifulSoup to do what I want with the string. But when I was
researching the 'urllib' module I couldn't find anything about its
sub-section '.read()' ? Is that the right module to get a html page
into a string? Or am I completely missing something here? I'll take
this as the more likely of the two cases. Thanks for any and all help.



From brandon.mcginty at gmail.com  Sat Feb 25 00:14:06 2006
From: brandon.mcginty at gmail.com (brandon.mcginty at gmail.com)
Date: Fri, 24 Feb 2006 22:14:06 -0700
Subject: webmail-SquirrelMail Fetcher In Python
Message-ID: <000001c639ca$4e7d4f50$6400a8c0@D1FWTS61>

Thanks for your help.
I wish I could do that; however our IT department is ... Zelis ... About
security; it's a school district, so lots of confidential data, etc, etc
(their reason).
Oh well, I'll look for an imap server on the network if I can, but I doubt
I'll find it normally.
If anyone else has any other info, I'd appreciate it.


THX Much,
Brandon McGinty

> -----Original Message-----
> From: 
> python-list-bounces+brandon.mcginty=gmail.com at python.org 
> [mailto:python-list-bounces+brandon.mcginty=gmail.com at python.o
> rg] On Behalf Of Paul Rubin
> Sent: Friday, February 24, 2006 7:54 PM
> To: python-list at python.org
> Subject: Re: webmail-SquirrelMail Fetcher In Python
> 
> 
> <brandon.mcginty at gmail.com> writes:
> > I've been looking on the net for a program to gather 
> e-mails from the
> > squirrelmail interface, and haven't found any.
> > My office only allows me to get e-mail access via webmail, at least
> > when I'm outside of the corperate network.
> 
> Squirrelmail is an IMAP client so there must be an IMAP server on the
> server side somewhere.  Why not talk to your IT dept about accessing
> it with a normal mail client instead of messing with screen scraping
> madness.  Squirrelmail is pretty messy and I gave up on it long ago.
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 
> -- 
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.1.375 / Virus Database: 268.1.0/269 - Release 
> Date: 2/24/2006
>  
> 

-- 
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.375 / Virus Database: 268.1.0/269 - Release Date: 2/24/2006
 

-- 
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.375 / Virus Database: 268.1.0/269 - Release Date: 2/24/2006
 



From robert.kern at gmail.com  Thu Feb 16 21:54:02 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 16 Feb 2006 20:54:02 -0600
Subject: calculating on matrix indices
In-Reply-To: <43F50D7F.8010108@bryant.edu>
References: <43F50D7F.8010108@bryant.edu>
Message-ID: <dt3dsd$ujl$1@sea.gmane.org>

Brian Blais wrote:
> Hello,
> 
> In my attempt to learn python, migrating from matlab, I have the following problem. 
> Here is what I want to do, (with the wrong syntax):
> 
> from numpy import *
> 
> t=arange(0,20,.1)
> x=zeros(len(t),'f')
> 
> idx=(t>5)
> tau=5
> x[idx]=exp(-t[idx]/tau)  # <---this line is wrong (gives a TypeError)
> 
> #------------------
> 
> what is the best way to replace the wrong line with something that works: replace all 
> of the values of x at the indices idx with exp(-t/tau) for values of t at indices idx?

The traceback tells you exactly what's wrong:

In [7]: x[idx] = exp(-t[idx]/tau)
---------------------------------------------------------------------------
exceptions.TypeError                                 Traceback (most recent call
last)

/Users/kern/<ipython console>

TypeError: array cannot be safely cast to required type

In [8]: t.dtype
Out[8]: dtype('>f8')

In [9]: x.dtype
Out[9]: dtype('>f4')

In [10]: exp(-t[idx]/tau).dtype
Out[10]: dtype('>f8')

The righthand-side is in double precision, but you are trying to stuff it into a
single-precision array. numpy can't do that conversion without losing precision,
so it raises a TypeError. If you really wanted x to be single precision, then
you would explicitly do the conversion on the righthand-side.

In [11]: x[idx] = exp(-t[idx]/tau).astype(float32)

In [12]: x
Out[12]:
array([ 0.        ,  0.        ,  0.        ,  0.        ,  0.        ,
        0.        ,  0.        ,  0.        ,  0.        ,  0.        ,
        0.        ,  0.        ,  0.        ,  0.        ,  0.        ,
        0.        ,  0.        ,  0.        ,  0.        ,  0.        ,
        0.        ,  0.        ,  0.        ,  0.        ,  0.        ,
        0.        ,  0.        ,  0.        ,  0.        ,  0.        ,
        0.        ,  0.        ,  0.        ,  0.        ,  0.        ,
        0.        ,  0.        ,  0.        ,  0.        ,  0.        ,
        0.        ,  0.        ,  0.        ,  0.        ,  0.        ,
        0.        ,  0.        ,  0.        ,  0.        ,  0.        ,
        0.        ,  0.36059493,  0.35345468,  0.34645581,  0.33959553,
...
        0.02024191,  0.0198411 ,  0.01944822,  0.01906312,  0.01868564],
dtype=float32)

However, I suspect that you wanted x to be the same precision as t, which
defaults to double precision just like Python.

In [13]: x = zeros(len(t), float)

In [14]: x[idx] = exp(-t[idx]/tau)

In [15]: x
Out[15]:
array([ 0.        ,  0.        ,  0.        ,  0.        ,  0.        ,
        0.        ,  0.        ,  0.        ,  0.        ,  0.        ,
        0.        ,  0.        ,  0.        ,  0.        ,  0.        ,
        0.        ,  0.        ,  0.        ,  0.        ,  0.        ,
        0.        ,  0.        ,  0.        ,  0.        ,  0.        ,
        0.        ,  0.        ,  0.        ,  0.        ,  0.        ,
        0.        ,  0.        ,  0.        ,  0.        ,  0.        ,
        0.        ,  0.        ,  0.        ,  0.        ,  0.        ,
        0.        ,  0.        ,  0.        ,  0.        ,  0.        ,
        0.        ,  0.        ,  0.        ,  0.        ,  0.        ,
        0.        ,  0.36059494,  0.35345468,  0.34645581,  0.33959553,
...
        0.02024191,  0.01984109,  0.01944821,  0.01906311,  0.01868564])

BTW, because using arange with floating point steps is somewhat unreliable
because it's floating point. You may want to use linspace() instead.

In [16]: linspace?
Type:           function
Base Class:     <type 'function'>
String Form:    <function linspace at 0x6e21f0>
Namespace:      Interactive
File:
/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/numpy-0.9.5.2085-py2.4-macosx-10.4-ppc.egg/numpy/lib/function_base.py
Definition:     linspace(start, stop, num=50, endpoint=True, retstep=False)
Docstring:
    Return evenly spaced numbers.

    Return 'num' evenly spaced samples from 'start' to 'stop'.  If
    'endpoint' is True, the last sample is 'stop'. If 'retstep' is
    True then return the step value used.

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From python at hope.cz  Wed Feb  8 10:28:13 2006
From: python at hope.cz (Lad)
Date: 8 Feb 2006 07:28:13 -0800
Subject: What editor shall I use?
In-Reply-To: <dsd0s6$1sps$1@boco.fee.vutbr.cz>
References: <1139410110.389122.215400@z14g2000cwz.googlegroups.com>
	<dsd0s6$1sps$1@boco.fee.vutbr.cz>
Message-ID: <1139412493.264154.38230@g44g2000cwa.googlegroups.com>

I did not find where I can set encoding type in vim



From fredrik at pythonware.com  Mon Feb 13 02:30:32 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Feb 2006 08:30:32 +0100
Subject: Slightly OT: Ranking noise
References: <1139811912.124589.173260@g44g2000cwa.googlegroups.com>
Message-ID: <dspciq$bd6$1@sea.gmane.org>

Kay Schluehr wrote:

> For those people who use google groups to access comp.lang.python may
> enjoy now looking at contentess shiny yellow stars - shining brighter
> than anything else on the site. The only pattern I've found are one or
> two shiny yellow stars for many newbie postings. According to the
> staring semantics the plebs tries to inform me that those are mostly
> irrelevant. I slightly disagree but don't want to give 5 stars anyway.
> The other funny discovery I made is that some part of the mobocracy
> thinks that Alex Martelli is average.

he's lucky:

    http://www.flickr.com/photos/effbot/98878478/

</F>





From gaz082 at gmail.com  Wed Feb 22 12:31:07 2006
From: gaz082 at gmail.com (Gaz)
Date: 22 Feb 2006 09:31:07 -0800
Subject: No
In-Reply-To: <j-x*9gY-q@news.chiark.greenend.org.uk>
References: <1140534490.873612.64280@g47g2000cwa.googlegroups.com>
	<dtfhv7$css$1@sea.gmane.org>
	<mailman.2265.1140551970.27775.python-list@python.org>
	<1140619645.303344.317890@g14g2000cwa.googlegroups.com>
	<j-x*9gY-q@news.chiark.greenend.org.uk>
Message-ID: <1140629467.849254.285410@g43g2000cwa.googlegroups.com>

(the Input type = FILE is in the field)

please check this out

import ftplib
import os

...

    def upload(ftp, file):
        ext = os.path.splitext(file)[1]
        if ext in (".txt", ".htm", ".html"):
            ftp.storlines("STOR " + file, open(file))
        else:
            ftp.storbinary("STOR " + file, open(file, "rb"), 1024)

    ftp = ftplib.FTP("ftp.XXXX.f2o.org")
    ftp.login("XXXXX", "XXXXX")

    upload(ftp, "c:\check.jpg")

I'm still getting the file not found error:

http://img153.imageshack.us/img153/2720/error3ps.jpg

I believe the path is kinda wrong or something. But this time, the
script is supposed to fetch the file from my pc.



From paul at boddie.org.uk  Tue Feb 14 13:51:02 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 14 Feb 2006 10:51:02 -0800
Subject: Python / Apache / MySQL
References: <1139907519.427789.188760@g14g2000cwa.googlegroups.com>
	<slrndv38ti.7rh.sybrenUSE@schuimige.unrealtower.org>
	<0001HW.C01764D700060858F0407550@news.individual.de>
	<43f1aebb$0$1728$636a55ce@news.free.fr>
	<0001HW.C01772E1000952B1F0407550@news.individual.de>
	<slrndv3ed3.9cm.sybrenUSE@schuimige.unrealtower.org>
	<86v3v1pvoi514avlbio77t238rpud4ppdi@4ax.com>
	<slrndv44rd.bg6.sybrenUSE@schuimige.unrealtower.org>
Message-ID: <1139943062.420482.211770@f14g2000cwb.googlegroups.com>

Sybren Stuvel wrote:
> Dennis Lee Bieber enlightened us with:
> > I believe that since 4.1, the "default table format" is InnoDB, and
> > that DOES have some support foreign keys and transactions.
>
> Finally they are starting to make more sense. I'd still rather use a
> database that has had those features for a longer time, though.

My experience with MySQL on the abomination that is Fedora Core (so I
imagine it was 4.x as opposed to 5.x), was that the default table type
appeared to be the ridiculously incapable MyISAM, and that by choosing
InnoDB you got transactions along with a bunch of limitations and a
serving of odd behaviour, where "odd" means "would raise a laugh
amongst users of other database systems".

I think you only really need to compare the manuals for MySQL [1] and
PostgreSQL [2] to see that PostgreSQL offers straightforward but
seemingly well-tested functionality for populating databases and then
having them just work properly, whereas MySQL offloads an array of
"features" and a mangled SQL syntax onto the developer/administrator in
a way that would suggest, if one were to be uncharitable in this
matter, that the developers of MySQL aren't confident that everything
works and would rather "empower" users to make their own choices and
then to apologise for themselves when something they thought might work
(and probably would on some other system) actually doesn't.

Anyway, various comparisons have been made, and here are a few
good/recent ones:

http://www.wlug.org.nz/PostgresVsMysql
http://sql-info.de/mysql/gotchas.html
http://sql-info.de/postgresql/postgres-gotchas.html

And here's one with a Pythonic slant:

http://bob.pythonmac.org/archives/2005/08/12/mysql-hate/

Paul

[1] http://dev.mysql.com/doc/refman/5.0/en/
[2] http://www.postgresql.org/docs/7.4/static/



From fabioxgn at gmail.com  Fri Feb 24 23:09:08 2006
From: fabioxgn at gmail.com (sapo)
Date: 24 Feb 2006 20:09:08 -0800
Subject: PyGTK + Glade = weird problem
In-Reply-To: <1140839902.199924.249180@z34g2000cwc.googlegroups.com>
References: <1140831896.360625.172620@p10g2000cwp.googlegroups.com>
	<1140838606.845184.304500@u72g2000cwu.googlegroups.com>
	<1140839146.072788.25120@j33g2000cwa.googlegroups.com>
	<1140839902.199924.249180@z34g2000cwc.googlegroups.com>
Message-ID: <1140840548.242833.74450@v46g2000cwv.googlegroups.com>

Man, you saved my day.

I spent all day writing and rewriting stuff, i asked several times on
the #python channel on irc.freenode.org, asked in the ubuntuforums,
asked all people i know that uses python.. and nobody solved it.

And it was a very simple and stupid thing!

thanx a lot it worked perfectly!



From singletoned at gmail.com  Tue Feb  7 17:04:57 2006
From: singletoned at gmail.com (Ed Singleton)
Date: Tue, 7 Feb 2006 22:04:57 +0000
Subject: Question about idioms for clearing a list
In-Reply-To: <dsb3lq$shu$1@sea.gmane.org>
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au>
	<ds83kd$98m$1@sea.gmane.org>
	<mailman.1510.1139250471.27775.python-list@python.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<E78Gf.22893$Jd.14515@newssvr25.news.prodigy.net>
	<dsb3lq$shu$1@sea.gmane.org>
Message-ID: <34bb7f5b0602071404q10288d1fw@mail.gmail.com>

On 07/02/06, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Bryan Olson wrote:
>
> > So is consistency; it ain't Perl, thank Guido.
>
> consistency is the hobgoblin of little minds.
>
> > Python now has, what, three built-in mutable collections types:
> > lists, dictionaries, and sets. Dicts and sets both have a clear()
> > method and lists do not.
>
> dicts and sets are mappings, and lists are not.  mappings don't
> support slicing.  lists do.
>
> are you sure you know Python ?

Is it obvious to a newbie what the difference between mappings and
"not-mappings", and is it obvious exactly what is and isn't a mapping?

Should it be necessary to "know" python before it becomes easy to use?

Ed


From saint.infidel at gmail.com  Wed Feb  1 15:38:26 2006
From: saint.infidel at gmail.com (infidel)
Date: 1 Feb 2006 12:38:26 -0800
Subject: indentation messing up my tuple?
In-Reply-To: <1138820907.033454.309290@g14g2000cwa.googlegroups.com>
References: <1138409154.334017.176760@g49g2000cwa.googlegroups.com>
	<pan.2006.01.28.01.27.40.386948@REMOVETHIScyber.com.au>
	<1138414427.035181.284740@z14g2000cwz.googlegroups.com>
	<1138477255.714961.281940@f14g2000cwb.googlegroups.com>
	<1138727155.471107.206720@o13g2000cwo.googlegroups.com>
	<1138820907.033454.309290@g14g2000cwa.googlegroups.com>
Message-ID: <1138826306.523674.270690@z14g2000cwz.googlegroups.com>

> i am using a tuple because i am building lists.

I don't understand

> if i just use (food +
> drink) then while drink is unique food remains the same do i get this:
>
> (burger, coke)
> (burger, 7up)
> (burger, sprite)

I don't understand what you're saying here.


food and drink are both strings.  adding them together gives you a new
string.  putting parentheses around a string does not give you a tuple,
you need that magic comma to get python to recognize the expression as
a tuple.

As I said:

> > (food + drink + '\n') is not a tuple, (food + drink + '\n',) is


And since all you're doing with the data list is joining into a single
string, I still don't see where you need any tuples.



From drrngrvy at gmail.com  Sun Feb 12 15:48:48 2006
From: drrngrvy at gmail.com (drrngrvy)
Date: 12 Feb 2006 12:48:48 -0800
Subject: is there a better way?
In-Reply-To: <43ef43b3$0$284$626a14ce@news.free.fr>
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
	<43ef43b3$0$284$626a14ce@news.free.fr>
Message-ID: <1139777328.511224.208080@g44g2000cwa.googlegroups.com>


Bruno Desthuilliers wrote:
> markscala at gmail.com a ?crit :
> > Problem:
> >
> > You have a list of unknown length,
>
> This doesn't exist in Python:
>    len(alist)
>
> > such as this: list > [X,X,X,O,O,O,O].  You want to extract all and only the X's.
>
> braindead solution - relying on zeros being zeros or any other False value:
> all_xxx
> >  You know
> > the X's are all up front and you know that the item after the last X is
> > an O, or that the list ends with an X.  There are never O's between
> > X's.
> >
>
> Then it *may* be possible to optimize - but code will break as soon as
> this rule change. So is there a real need for optimisation ? (hint: dont
> guess, profile)
>
>
> FWIW, I've collected all suggestions here (and perhaps some others) and
> hacked a Q&D benchmark. Usage is:
>
> python test_lists.py [repeat [list_size [xcount]]
>
> where:
> * repeat is the number of iteration, default to 1000
> * list_size is the size of the list, default to 100
> * xcount is the number or non-zero values in the list, default is random
>
> I've run it a few times, and it seems that in most cases,
>   *  the bisect-like approach (Alex Martelli / Karl Friedrich Bolz) is
> the winner
>   * the while/pop approach of the OP (slightly rewritten...) is really wrong
>
> FWIW, one of the dummiest possible approach IMHO
> (ie filter(None, alist)) behaves quite correctly wrt some other
> 'optimized' approachs - and is still safe if the rules about the
> composition of the list changes... Could it be that no optimization is
> sometime the best optimisation ?-)
>
>
> # test_lists.py
> from itertools import takewhile
> from timeit import Timer
> from random import randint
>
> def get_list(size, xcount=None):
>      if xcount is None:
>          xcount      else:
>          assert xcount <     zcount      return [1] * xcount + [0] * zcount
>
> def with_while(alist):
>      res      while alist and alist[0]:
>          res.append(alist.pop(0))
>      return res
>
> def with_for(alist):
>      res      for x in alist:
>          if not x: break
>          res.append(x)
>      return res
>
> def with_filter(alist):
>      return filter(None, alist)
>
> def with_comprehension(alist):
>      return [x for x in alist if x]
>
> def with_takewhile(alist):
>      return list(takewhile(lambda x: x!=0, alist))
>
> def with_slice_try(alist):
>      try:
>          return alist[:alist.index(0)]
>      except ValueError:
>          return alist[:]
>
> def with_slice_safe(alist):
>      alist.append(0)
>      return alist[:alist.index(0)]
>
> def with_delslice_safe(alist):
>      alist.append(0)
>      del alist[alist.index(0):]
>      return alist
>
> def with_sect(alist):
>      low      high      while low < high:
>          mid          if alist[mid] = 0:
>              high          else:
>              low      return alist[:low]
>
> _candidates                 if n.startswith('with_') and callable(o)]
>
> def run_test(repeat00, list_size='100', xcount='None'):
>      global _candidate
>
>      print """
> params :
>   * repeat : %s
>   * list_size : %s
>   * xcounts : %s
> """  % (repeat, list_size, xcount)
>      results      for n in _candidates:
>          stm, stp                      'from __main__ import %s, get_list' % n)
>          results[n]
>      sorted_results                                for n, time in results.items()])
>      for _, result in sorted_results:
>          print "%s : %s" % result
>
>
> def main(args):
>      try:
>          repeat      except:
>          repeat      try:
>          list_size      except:
>          list_size      try:
>          xcount      except:
>          xcount
>      run_test(repeat, list_size, xcount)
>
> if __name__ = '__main__':
>      import sys
>      main(sys.argv[1:])
> 
> 
> HTH



From aleaxit at yahoo.com  Tue Feb 14 23:33:28 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Tue, 14 Feb 2006 20:33:28 -0800
Subject: How to *Search* with google from inside my programme and get
	the	search result?
References: <mailman.1933.1139969478.27775.python-list@python.org>
Message-ID: <1harnpt.1lwux2e175me7bN%aleaxit@yahoo.com>

Frank Potter <could.net at gmail.com> wrote:
   ...
> Does google supply some webservice to programmers? I did see

Yep, see http://www.google.com/apis/index.html .


Alex


From tzot at sil-tec.gr  Mon Feb 13 11:16:06 2006
From: tzot at sil-tec.gr (Christos Georgiou)
Date: Mon, 13 Feb 2006 18:16:06 +0200
Subject: python-ldap
References: <1139330793.864675.302090@f14g2000cwb.googlegroups.com>
	<mailman.1559.1139333846.27775.python-list@python.org>
	<1139335345.415395.41690@g43g2000cwa.googlegroups.com>
Message-ID: <t3c1v1ljv4csitbf12k9o0goj96qlmkncb@4ax.com>

On 7 Feb 2006 10:02:23 -0800, rumours say that "btaranto at gmail.com"
<btaranto at gmail.com> might have written:

>_)_

On 7 Feb 2006 10:02:25 -0800, rumours say that "btaranto at gmail.com"
<btaranto at gmail.com> might have written:

>_)_

You can't beat Steve with a pair of arses, because Steve's hand is
physically higher than your arse (even considering a big age-gap between you
two).

If you said o0o, I'd call your bluff a zero and raise an eye (make that a
capital eye).  I also believe that I could fit a db in there (as thin as the
crack may be), but (o)(o) would be cozier as a receptacle.

Now, let us all smart_)_s peace off.

PS should anyone grab the chance and mix ethnic jokes based on my
nationality in a reply, I'll have to tell you that I have been offended by
professionals during my army service and you'll barely scratch my back :)
-- 
TZOTZIOY, I speak England very best.
"Dear Paul,
please stop spamming us."
The Corinthians


From grante at visi.com  Fri Feb  3 00:33:35 2006
From: grante at visi.com (Grant Edwards)
Date: Fri, 03 Feb 2006 05:33:35 -0000
Subject: Calling a string as a function.
References: <mailman.1371.1138943429.27775.python-list@python.org>
Message-ID: <11u5qpfsmnaljad@corp.supernews.com>

On 2006-02-03, <brandon.mcginty at gmail.com> <brandon.mcginty at gmail.com> wrote:

> How does one go about converting a string, for instants one received through
> tcp, into something that can be called as a function?

http://groups.google.com/group/comp.lang.python/browse_thread/thread/6735f7e30fffb077



From andrewfelch at gmail.com  Tue Feb  7 17:11:12 2006
From: andrewfelch at gmail.com (andrewfelch at gmail.com)
Date: 7 Feb 2006 14:11:12 -0800
Subject: Easy way to make Numarray Bool use 1 bit?
In-Reply-To: <1139346917.187413.96850@z14g2000cwz.googlegroups.com>
References: <1139346917.187413.96850@z14g2000cwz.googlegroups.com>
Message-ID: <1139350272.690408.42050@g47g2000cwa.googlegroups.com>

Ahh, I figured it out.  The key is to set up the shapes so they
broadcast like an outerproduct, but using bitwise_and as the operation
and the second operand as the bit filter.  So we temporarily expand
each bit to a byte for numarray to be able to use it for dot products.
If you use a temporary Boolean variable to store the bitwise_and ufunc
output, the answer is automatically converted to boolean.

Set up the shapes for an innerproduct-like operation to go from byte
format back to bit compact Uint8 format.  Go numarray!



From lcrees at gmail.com  Wed Feb  8 12:07:57 2006
From: lcrees at gmail.com (L.C. Rees)
Date: 8 Feb 2006 09:07:57 -0800
Subject: Mixing custom __setattr__ method and properties in new style classes
Message-ID: <1139418477.572639.154300@z14g2000cwz.googlegroups.com>

Can custom __setattr__ methods and properties be mixed in new style
classes?

I experimented with a new style class with both a custom __setattr__
method and a property. Attributes controlled by the __setattr__ method
work fine. When I attempt to set or get the property it raises the
error: "TypeError: _settext() takes exactly two arguments (1 given)".
This suggests that the __setattr__ may be conflicting with assignment
to the property since it doesn't seem the class name is being passed to
the property when it's created. This is the code for the property at
the end of the class definition:

    def _settext(self, txt):
        self._tree.text = txt

    def _gettext(self, txt):
        return self._tree.text

    def _deltext(self, txt):
        self._tree.text = ''

    text = property(_settext, _gettext, _deltext)



From kak at purdue.edu  Sun Feb  5 00:45:24 2006
From: kak at purdue.edu (Avi Kak)
Date: Sun, 05 Feb 2006 05:45:24 GMT
Subject: Does Python support a peek like method for its file objects?
Message-ID: <4s3bu1p178o46hh0jcj0eld5git5paog4q@4ax.com>



Hello:

  Does Python support a peek like method for its file objects?

  I'd like to be able to look at the next byte in a disk file before
  deciding whether I should read it with, say, the read() method.
  Is it possible to do so in Python?

  Your answer would be much appreciated.

  Thanks.

Avi Kak


From quentel.pierre at wanadoo.fr  Wed Feb  8 02:33:41 2006
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: 7 Feb 2006 23:33:41 -0800
Subject: Too Many if Statements?
In-Reply-To: <dsb95i$pld$1@xenon.Stanford.EDU>
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<dsaqkj$jhm$1@xenon.Stanford.EDU>
	<GU8Gf.22899$Jd.6095@newssvr25.news.prodigy.net>
	<dsb95i$pld$1@xenon.Stanford.EDU>
Message-ID: <1139384021.290153.120470@g14g2000cwa.googlegroups.com>

This is because Python has a hidden mechanism to detect programs
generated by Perl scripts, and make them crash with no explanation

Pierre



From fredrik at pythonware.com  Mon Feb 13 15:31:40 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Feb 2006 21:31:40 +0100
Subject: asynchat + send problem
References: <dsqpnv$d9$1@orkan.itea.ntnu.no>
Message-ID: <dsqqbf$q4e$1@sea.gmane.org>

"Andreas R." <andreas at openrts.org> wrote:

> I'm using Python's asynchat for networking. If I invoke the send()
> method of the asynchat module, only a single send operation is possible
> at any given time. If I call it more than once, only the first call is
> registered at the other client.

use "push" to queue outgoing data, not "send".  see

    http://www.effbot.org/librarybook/asynchat.htm

for a few examples.

</F>





From deets at nospam.web.de  Sun Feb  5 07:56:57 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 05 Feb 2006 13:56:57 +0100
Subject: rexec in jython??
References: <1139138133.072742.282710@z14g2000cwz.googlegroups.com>
	<1139140115.016898.72360@z14g2000cwz.googlegroups.com>
	<1139142998.236991.130470@g47g2000cwa.googlegroups.com>
Message-ID: <44mb0pF2rqu1U1@uni-berlin.de>

Mark Fink wrote:

> this is really funny...
> I tried to use eval(String) as an replacement. It works now but the
> calculation results from my tests are not as expected: 2 + 3 = 23 !!! 2
> - 3 = 2-3...
> I have the feeling that there is a really easy solution for this.
> Unfortunately I have no enough experience

How about showing code? Otherwise we all have to use our crystal balls, and
these thingies tend to be not so precise...

Diez


From liquidfart at gmail.com  Fri Feb 24 20:59:34 2006
From: liquidfart at gmail.com (liquid)
Date: 24 Feb 2006 17:59:34 -0800
Subject: list assignment using concatenation "*"
Message-ID: <1140832774.530010.251930@j33g2000cwa.googlegroups.com>

If I do:

a = [ [0,0,0], [0,0,0], [0,0,0] ]
a[0][1] = 1

I get:

a = [ [0,1,0],[0,0,0],[0,0,0] ]

as expected

But if I do:

a = [ [0] * 3 ] * 3
a[0][1] = 1

I get

a = [[0,1,0],[0,1,0],[0,1,0]]

AFAIC, "*" is supposed to generate multiple copies of the given token.
Therefore I thought both cases would be the same, but they are not.

Can anyone explain to me what exactly is going on in the second case?



From diffuser78 at gmail.com  Mon Feb 27 01:21:26 2006
From: diffuser78 at gmail.com (diffuser78 at gmail.com)
Date: 26 Feb 2006 22:21:26 -0800
Subject: Python Indentation Problems
Message-ID: <1141021286.047172.278030@z34g2000cwc.googlegroups.com>

I am a newbie to Python. I am mainly using Eric as the IDE for coding.
Also, using VIM and gedit sometimes.

I had this wierd problem of indentation. My code was 100% right but it
wont run because indentation was not right. I checked time and again
but still no success. I rewrote the code over again in VI and it ran.

Can you please explain whats the trick behind the correct indentation.

Thanks



From larry.bates at websafe.com  Thu Feb 23 16:06:46 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Thu, 23 Feb 2006 15:06:46 -0600
Subject: spaces at ends of filenames or directory names on Win32
In-Reply-To: <dtl6a1$h85$1@solaris.cc.vt.edu>
References: <dtkuav$keb$1@solaris.cc.vt.edu> <43FE1B5E.8060009@websafe.com>
	<dtl6a1$h85$1@solaris.cc.vt.edu>
Message-ID: <-LWdnXIPmOx_vmPeRVn-tw@comcast.com>

rtilley wrote:
> Larry Bates wrote:
>> How about not naming files with leading and trailing spaces on
>> the Mac?  Seems like a bad habit that needs breaking ;-).
>>
>> -Larry Bates
> 
> Users will be users! Tell that to the guys and gals on Macs who like to
> make a folder sort based on the number of spaces they've placed in the
> front of the filenames :)

Sounds like you should change leading/trailing spaces to something
like underlines instead of stripping them off the filename.  That way
you preserve the character positions, visually the filenames are very
close.  Problem is that underlines sort to bottom instead of to the
top of a list of files.

On second thought, if you replace spaces with dashes they will sort
correctly, but they will look odd.

Pick your poison.

-Larry


From maxm at mxm.dk  Tue Feb 21 04:20:05 2006
From: maxm at mxm.dk (Max M)
Date: Tue, 21 Feb 2006 10:20:05 +0100
Subject: Zope 3?? How do you start it on Windows?
In-Reply-To: <1140496495.019513.161010@z14g2000cwz.googlegroups.com>
References: <1140496495.019513.161010@z14g2000cwz.googlegroups.com>
Message-ID: <43fadafe$0$38624$edfadb0f@dread12.news.tele.dk>

kbperry wrote:
> Call me crazy and stupid, but how do you start zope?  I downloaded the
> thing, installed it, and then nothing.  I can find a stupid README.txt
> that is useful.
> 
> Can someone help?....Please!


Install Python 2.4

Install Zope 3 in that python by using setup.py

Make a Zope instance with Python24\Scripts\mkzopeinstance.bat

Start that instance by running

<INSTANCE_HOME>/bin/runzope.bat


-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science


From cjw at sympatico.ca  Sun Feb 19 15:43:45 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Sun, 19 Feb 2006 15:43:45 -0500
Subject: number ranges (was Re: Matlab page on scipy wiki)
In-Reply-To: <1139945386.3346.38.camel@pc1.cole.uklinux.net>
References: <e86a5fd00602131854s73191cbbu742d4434ad074908@mail.gmail.com>
	<1139945386.3346.38.camel@pc1.cole.uklinux.net>
Message-ID: <43F8D881.5030804@sympatico.ca>

Bryan Cole wrote:

>>        
>>
>>First, I think the range() function in python is ugly to begin with.
>>Why can't python just support range notation directly like 'for a in
>>0:10'.  Or with 0..10 or 0...10 syntax.  That seems to make a lot more
>>sense to me than having to call a named function.   Anyway, that's a
>>python pet peeve, and python's probably not going to change something
>>so fundamental... 
>>    
>>
>
>There was a python PEP on this. It got rejected as having too many
>'issues'. Pity, in my view.
>
>see http://www.python.org/peps/pep-0204.html
>
>BC
>  
>
This decision appears to have been made nearly six years ago.  It would
be a good idea to revisit the decision, particularly since the reasons
for rejection are not clearly spelled out.

The conditional expression (PEP 308) was rejected but is currently being
implemented in Python version 2.5.  It will have the syntax A if C else B.

I have felt, as Gary Ruben says above, that the range structure is ugly.

Two alternatives have been suggested:
a) a:b:c
b) a..b..c

Do either of these create parsing problems?
for i in a:b:
Should this be treated as an error, with a missing c (the increment)
  print i

for i in 2..5:
  print i                                                           We
don't know whether the 2 is an integer until the second period is scanned.

It would be good if the range and slice could be merged in some way,
although the extended slice is rather complicated - I don't understand it.

    The semantics for an extended slicing are as follows. The primary
    must evaluate to a mapping object, and it is indexed with a key that
    is constructed from the slice list, as follows. If the slice list
    contains at least one comma, the key is a tuple containing the
    conversion of the slice items; otherwise, the conversion of the lone
    slice item is the key. The conversion of a slice item that is an
    expression is that expression. The conversion of an ellipsis slice
    item is the built-in |Ellipsis| object. The conversion of a proper
    slice is a slice object (see section section 4.2 The standard type
    hierarchy <http://www.network-theory.co.uk/docs/pylang/ref_30.html>)
    whose |start|, |stop| and |step| attributes are the values of the
    expressions given as lower bound, upper bound and stride,
    respectively, substituting |None| for missing expressions.

[source: http://www.network-theory.co.uk/docs/pylang/ref_60.html]

The seems to be a bit of a problem with slicing that needs sorting out.

The syntax for a slice list appears to allow multiple slices in a list:

    extended_slicing 	::= 	primary <primaries.html#tok-primary> "["
    slice_list <slicings.html#tok-slice_list> "]"
    slice_list 	::= 	slice_item <slicings.html#tok-slice_item> (","
    slice_item <slicings.html#tok-slice_item>)* [","]

but the current interpreter reports an error:

     >>> a= range(20)
     >>> a[slice(3, 9, 2)]
    [3, 5, 7]
     >>> a[slice(3, 9, 2), slice(5, 10)]
    Traceback (most recent call last):
      File "<interactive input>", line 1, in ?
    TypeError: list indices must be integers
     >>>

I have taken the liberty of cross posting this to c.l.p.

Colin W.


From duncanm255 at hotmail.com  Mon Feb 20 15:28:02 2006
From: duncanm255 at hotmail.com (D)
Date: 20 Feb 2006 12:28:02 -0800
Subject: Open Relay Test
In-Reply-To: <mailman.2168.1140453192.27775.python-list@python.org>
References: <1140150719.298606.9710@g44g2000cwa.googlegroups.com>
	<mailman.2168.1140453192.27775.python-list@python.org>
Message-ID: <1140467282.174986.177190@g44g2000cwa.googlegroups.com>

Thanks, Christoph..in order to automate this in a program (so the test
can be initiated from a system other than the mail server), I'm
thinking it could be automated (via pstools) to run on the system in
question.  I'll give it a try!

Cheers,

Doug



From carsten at uniqsys.com  Fri Feb 10 08:56:17 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 10 Feb 2006 08:56:17 -0500
Subject: Create dict from two lists
In-Reply-To: <1139579518.129742.265680@o13g2000cwo.googlegroups.com>
References: <1139579518.129742.265680@o13g2000cwo.googlegroups.com>
Message-ID: <1139579776.2349.36.camel@dot.uniqsys.com>

On Fri, 2006-02-10 at 08:51, py wrote:
> I have two lists which I want to use to create a dictionary.  List x
> would be the keys, and list y is the values.
> 
> x = [1,2,3,4,5]
> y = ['a','b','c','d','e']
> 
> Any suggestions?  looking for an efficent simple way to do this...maybe
> i am just having a brain fart...i feel like this is quit simple.

d = dict(zip(x,y))

-Carsten




From steve at REMOVETHIScyber.com.au  Mon Feb 27 17:21:24 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Tue, 28 Feb 2006 09:21:24 +1100
Subject: different ways to strip strings
References: <dtvgd4$ci7$1@solaris.cc.vt.edu>
Message-ID: <pan.2006.02.27.22.21.23.458091@REMOVETHIScyber.com.au>

On Mon, 27 Feb 2006 13:28:44 -0500, rtilley wrote:

> s = ' qazwsx '
> 
> # How are these different?
> print s.strip()
> print str.strip(s)

s.strip() strips white space from the start and end of string s. That is
standard object-oriented behaviour: you have an instance, s, and you call
its method, strip.

str.strip(s) is a little more tricky, but not much. str is the built-in
type for strings. Due to historical reasons, Python types and
user-definable classes are slightly different, but at the level we're
discussing here, you can imagine there is no difference.

In effect, you can think of str.strip(s) as calling the strip method
of the class (technically type) str, with s as the first argument. That is
equivalent to calling the strip method of the instance s with no arguments.


> Do string objects all have the attribute strip()? 

Yes, via inheritance. That is, each string object doesn't have a copy of
each method (strip, split, join, etc.) as that would be wasteful. The
same goes for all objects in Python, including ints, floats, lists,
as well as custom classes.

Python's inheritance rules mean that:

object_instance.method()

and 

object_type.method(object_instance) 

are equivalent.



> If so, why is str.strip() needed? 

Because that is the machinery by which string objects get the attribute
strip.


> Really, I'm just curious... there's a lot  don't fully understand :)

Gazing into my crystal ball, I'm going to answer your next question before
you answer it. Use the form s.strip() in preference to str.strip(s). It is
easier to read, faster, and generates smaller code.


-- 
Steven.



From lycka at carmen.se  Wed Feb  8 04:33:46 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 08 Feb 2006 10:33:46 +0100
Subject: Question about idioms for clearing a list
In-Reply-To: <mailman.1546.1139320907.27775.python-list@python.org>
References: <mailman.1294.1138727665.27775.python-list@python.org>	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>	<mailman.1489.1139232969.27775.python-list@python.org>	<ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>	<mailman.1537.1139297533.27775.python-list@python.org>	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>
	<mailman.1546.1139320907.27775.python-list@python.org>
Message-ID: <dscdtr$ciu$1@wake.carmen.se>

Ed Singleton wrote:
> I'm a fairly average programmer (better than average compared to my
> immediate colleagues).  I've read every tutorial I can get my hands
> on, but I have no _memory_  of ever coming across the del keyword, let
> alone that it is fundamental to Python, and I have no idea what
> collections school is.  I doubtless have read of it at some point, but
> as no importance has ever been attached to it, I have probably not
> remembered it.
> 
> Similarly, I remember slices simply because they are handy, not
> because I have ever heard of them being fundamental before.

Ok, I can understand that, but I  think that you really understand
that the strength of a programming language such as Python is that
it's like lego bricks. You have some basic pieces, and you can
combine them to into something unique that does what you want.

There are plenty of statements, operators, functions, types, modules
and other things in Python already. I can well imagine that you had
forgotten about del, and that you don't immediately think about slices
when you wonder how to empty a list. It's like when I build lego with
my son. I guess he has around 2000 pieces, and it's not always easy
to spot what you need. It was difficult enough when I was a kid. Now
there are so many different kinds of pieces, shaped to fulfil some
niche usecase.

One thing that I'm sure of is this: Making more kinds of odd-shaped
"pieces", especially prepared to solve the specific problem I'm facing
right now, won't make it easier to understand or use Python in the
long run.

I've used Python for almost 10 years now, and I still learn new
things, and I sometimes come across things that I once new but
had forgotten.

It might work for a while to add a new convenience function as soon
as someone finds that they don't immediately now how to solve a
certain problem. It's my impression that that's pretty much the idea
with PHP. It's not Python though. PHP is only successful in a fairly
narrow (if important) niche, it has failed in getting used outside
its niche, and I assume we'll see a decline in its use one the web
pretty soon, just as it happened with Perl. (Whether RoR, something
Python based or something entirely new will replace it is beyond my
radar screen though.)


From johnjsal at NOSPAMgmail.com  Wed Feb  8 23:00:33 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 08 Feb 2006 23:00:33 -0500
Subject: still a valid book?
In-Reply-To: <43eaa9f9$1@nntp0.pdx.net>
References: <uUsGf.1584$No6.37778@news.tufts.edu>
	<1139445749.902210.323680@f14g2000cwb.googlegroups.com>
	<14GdnZJ6l_e1AXfeRVn-pw@rcn.net> <43eaa9f9$1@nntp0.pdx.net>
Message-ID: <wZOdndQ0Ke0AI3feRVn-sQ@rcn.net>

Scott David Daniels wrote:
> John Salerno wrote:
>> Jonathan Gardner wrote:
>>> You may want to read
>>> http://python.org/doc/2.4.2/whatsnew/whatsnew24.html to get an idea of
>>> what has changed from 2.3 to 2.4 if you buy the 2.3 book.
>>>
>> Yeah, I was looking at that, but it seems a little over my head right 
>> now. I just didn't want to learn anything and then have to "unlearn" it. 
>> I'm sure I will always be adding new things, so that isn't so much the 
>> problem I guess.
> Python remains _extremely_ compatible from one minor version to the next
> (2.2 to 2.3, 2.3 to 2.4, ...) Python 3000 (which may well be Python 3.0)
> is allowed to break compatibility, _but_ it won't be conceptual
> compatibility; it will just discard "old stuff we no longer like."  I
> would suggest you don't pay much attention to "old-style classes":
>       class WhatEver:
>          ...
> and only use "new-style" classes:
>      class SomeClass(object):
>          ...
> since the "old-style classes" are going away (the "class Name: ..."
> syntax will start defining new-style classes as well).  Starting with
> 2.3 will put you quite near the modern edge, and the changes you will
> have to learn are not that great. People are still running code written
> under 1.5.2, so 2.3 is really quite modern.
> 
> --Scott David Daniels
> scott.daniels at acm.org

Thanks for the advice.


From eoinrogers at gmail.com  Fri Feb 17 15:02:28 2006
From: eoinrogers at gmail.com (Byte)
Date: 17 Feb 2006 12:02:28 -0800
Subject: Another stupid newbie question
In-Reply-To: <45mo91F7h0m6U1@individual.net>
References: <1140203709.145048.314180@g43g2000cwa.googlegroups.com>
	<mailman.2065.1140204717.27775.python-list@python.org>
	<1140205868.660418.234980@z14g2000cwz.googlegroups.com>
	<45mo91F7h0m6U1@individual.net>
Message-ID: <1140206548.577883.81040@g44g2000cwa.googlegroups.com>

Ahhh, Thanks

 -- /usr/bin/byte



From lycka at carmen.se  Thu Feb  2 11:46:03 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 02 Feb 2006 17:46:03 +0100
Subject: Detecting filename-encoding (on WinXP)?
In-Reply-To: <1138896194.914220.60080@o13g2000cwo.googlegroups.com>
References: <1138896194.914220.60080@o13g2000cwo.googlegroups.com>
Message-ID: <drtd0c$7gf$1@wake.carmen.se>

Tim N. van der Leeuw wrote:
> Hi,
> 
> I have a need to store directory and filenames in a database. For the
> database I chose to use UTF-8 encoding; but the actual encoding used is
> probably immaterial: whichever coding I take, I'll run into this issue
> eventually.
> 
> At first my code worked until I ran into a directory full of Cyrillic
> characters and my program blew up.

How did you find the files? Did you pass a Unicode path as argument
to os.listdir()? See http://www.python.org/peps/pep-0277.html

> So now what I need to know is, how do I find out in what encoding a
> particular filename is? Is there a portable way for doing this? And if
> not, then what is the non-portable way for doing this on Windows?
> (WinXP)
> (If there's only a non-portable way then I'll worry about porting it
> later, if and when this program will ever have a need to run on a
> Unix-like environment)



From robert.kern at gmail.com  Thu Feb 23 10:06:52 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 23 Feb 2006 09:06:52 -0600
Subject: computer algebra packages
In-Reply-To: <43fdabf8$0$64490$892e7fe2@authen.yellow.readfreenews.net>
References: <1118184041.459969.257190@g49g2000cwa.googlegroups.com>
	<43fdabf8$0$64490$892e7fe2@authen.yellow.readfreenews.net>
Message-ID: <dtkj2c$711$1@sea.gmane.org>

JCDenton wrote:
>>Rahulwrote:
> 
> Hi.
> 
>>Well is there an open source computer algebra system written in
> 
> python
> 
>>or at least having a python interface?
>>I know of 2 efforts: pythonica and pyginac...are there any others?

[Apologies for piggybacking.]

http://sage.sourceforge.net/

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From manens at doe.com  Mon Feb 20 18:49:44 2006
From: manens at doe.com (Florent Manens)
Date: 20 Feb 2006 23:49:44 GMT
Subject: Embedding a binary file in a python script
References: <1140021879.698353.324230@o13g2000cwo.googlegroups.com>
Message-ID: <slrndvklco.4oi.manens@localhost.localdomain>

Hi,

Le 15-02-2006, mrstephengross <mrstephengross at hotmail.com> a ?crit?:
> I want to find a way to embed a tar file *in* my python script, and
> then use the tarfile module to extract it. That is, instead of
> distributing two files (extractor.py and archive.tar) I want to be able
> to distribute *one* file (extractor-with-embedded-archive.py). Is there
> a way to do this? 

It's exactly the goal of my script here (sorry for the blog post):
http://grossac.org/index.php/2006/01/16/29--python-comment-inclure-des-donnees-dans-un-fichier-exe-cree-avec-py2exe
and here :
http://grossac.org/index.php/2006/02/12/34-data2py-petite-optimisation-et-remarque
It's in French, I can help if you need.

Take a look at Fredrik Lundh answer, it is very similar.

code sample :

In [6]:f = file("text.txt", "rb")
In [7]:buff = f.read()
In [8]:print "data = %s%s%s" % ('"""', buff.encode("zlib").encode("base64"), '"""')
data = """eJxzys/Lyi8tUgQADecDAQ==
"""

You get a compressed, base64 encoded string, then add data = """..."""
to your source code.

In [9]:data = """eJxzys/Lyi8tUgQADecDAQ==
   .9.:"""
In [10]:data.decode("base64").decode("zlib")
Out[10]:'Bonjour!'

If you want to create a .exe with files included, take a look at PyInstaller.

Hope this helps.

-- 
Florent Manens
manens at grossac.org
http://grossac.org


From sybrenUSE at YOURthirdtower.com.imagination  Tue Feb 21 17:43:25 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Tue, 21 Feb 2006 23:43:25 +0100
Subject: deriving from float or int
References: <1140502954.660120.174160@g14g2000cwa.googlegroups.com>
	<slrndvlfts.9se.sybrenUSE@schuimige.unrealtower.org>
	<1140555253.262485.214100@z14g2000cwz.googlegroups.com>
Message-ID: <slrndvn5sd.bv5.sybrenUSE@schuimige.unrealtower.org>

Russ enlightened us with:
> The problem is that when I derive a new class from float, the darn
> thing won't let me create a constructor that accepts more than one
> argument.

Use __new__, not __init__. It's the function that's called when a new
immutable object is created.

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From dcrespo at gmail.com  Tue Feb 21 10:26:58 2006
From: dcrespo at gmail.com (Daniel Crespo)
Date: 21 Feb 2006 07:26:58 -0800
Subject: Print a PDF transparently
In-Reply-To: <mailman.2210.1140513215.27775.python-list@python.org>
References: <mailman.2210.1140513215.27775.python-list@python.org>
Message-ID: <1140535618.210024.6290@g43g2000cwa.googlegroups.com>

Thank you very much Roger Upole and Tim Golden for your posts...

I found an exe that can print a pdf file (using Acrobat Reader) on any
windows printer right from the command line. It opens Acrobat, order it
to print the pdf file at a certain printer and then closes Acrobat. The
exe is a c-compiled program from someone that supplied it in a forum.

That works almost perfect for me. The only thing now is that when I'm
printing a PDF in dot matrix printers, the output is very ugly, and I
don't know how to improve it.

I think I will go for printing in plain text. The only problem with it
is that one have to depend on the physical printer configuration.

Daniel



From johnjsal at NOSPAMgmail.com  Sat Feb 11 14:52:10 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Sat, 11 Feb 2006 14:52:10 -0500
Subject: simple math question
Message-ID: <RuWdnVmaD4Q23XPeRVn-tw@rcn.net>

Hi all. I'm just starting out with Python, so I'm a little slow right 
now. :)

Can someone explain to me why the expression 5 / -2 evaluates to -3, 
especially considering that -2 * -3 evaluates to 6?

I'm sure it has something to do with the negative number and the current 
way that the / operator is implemented, but why doesn't it evaluate to 
-2 instead?


From aleaxit at yahoo.com  Wed Feb  8 10:56:05 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Wed, 8 Feb 2006 07:56:05 -0800
Subject: Is Python good for web crawlers?
References: <1139330008.270988.227170@g44g2000cwa.googlegroups.com>
	<dscj3o$nll$1@wake.carmen.se>
Message-ID: <1hafknf.1ft17us1sux13rN%aleaxit@yahoo.com>

Magnus Lycka <lycka at carmen.se> wrote:
   ...
> I dunno, but there are these two guys, Sergey Brin and Lawrence Page,
> who wrote a web crawler in Python. As far as I understood, they were
> fairly successful with it. I think they called their system Koogle,
> Bugle, or Gobble or something like that. Goo...can't remember.
> 
> See http://www-db.stanford.edu/~backrub/google.html

Yeah, I've heard of them, too.


> They've also employed some clever Python programmers, such as Greg
> Stein, Alex Martelli (isn't he a bot?) and some obscure dutch
> mathematician called Guido van something. It seems they still like
> Python.

Bot? me? did I fail a Turing test again without even noticing?!


Alex


From michele.simionato at gmail.com  Mon Feb 20 03:43:37 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 20 Feb 2006 00:43:37 -0800
Subject: Python vs. Lisp -- please explain
In-Reply-To: <yfspsljp321.fsf@oc.ex.ac.uk>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<yfspsljp321.fsf@oc.ex.ac.uk>
Message-ID: <1140425017.101462.117380@g47g2000cwa.googlegroups.com>

Alexander Schmolck wrote:
> As common lisp and scheme demonstrate you can have high level of dynamism (and
> in a number of things both are more dynamic than python) and still get very
> good performance (in some cases close to or better than C).

Just for personal enlightment, where do you think Lisp is more dynamic
of Python?
Can you new name a few features?

> What's far more interesting to me, however, is that I think there a good
> reasons to suspect python's slowness is more of a feature than a flaw: I'd not
> be suprised if on the whole it greatly increases programmer productivity and
> results in clearer and more uniform code.
>
> If you know the language to be dog slow any way, you're much less likely to
> waste your time (and that of future maintainers) on the pointless
> microoptimizations that geeks so love. Also, since only builtins have
> reasonable performance there's added motiviation to become very familiar with
> the available builtins (and standard libarary) and far less temptation to roll
> one's own version of say dict.setdefault (even if it it sucks). The fact that
> non-standard library code is inherently somewhat inferior (because it will
> either be written in python and slow or written in C and a pain to install)
> adds further incentive to attempt community wide standardization.
>
> I think it's not unreasonable to speculate that all this decreases production,
> maintenance and reuse costs of python code considerably, so much in fact that
> python's very slowness represents part of its competetive edge over languages
> that are in some ways better engineered and more capable.

I think you have a very good point here. +1000!

  Michele Simionato



From mhellwig at xs4all.nl  Fri Feb 17 04:01:05 2006
From: mhellwig at xs4all.nl (Martin P. Hellwig)
Date: Fri, 17 Feb 2006 10:01:05 +0100
Subject: Open Relay Test
In-Reply-To: <1140156281.588073.276070@g47g2000cwa.googlegroups.com>
References: <1140150719.298606.9710@g44g2000cwa.googlegroups.com>
	<mailman.2039.1140154929.27775.python-list@python.org>
	<1140156281.588073.276070@g47g2000cwa.googlegroups.com>
Message-ID: <43f590d9$0$11061$e4fe514c@news.xs4all.nl>

D wrote:
> Nope, quite the contrary..I'm looking to write a simple program for a
> client of mine that will, among other things, verify that their
> clients' email servers do not have open relays.
> 
I usually test it like this:

martin at proxy:~> telnet mail.huygenslyceum.nl smtp
Trying 172.16.64.12...
Connected to mail.huygenslyceum.nl.
Escape character is '^]'.
220 mail.huygenslyceum.nl ESMTP Sendmail 8.12.11/8.12.11; Fri, 17 Feb 
2006 10:03:46 +0100 (CET)
~> helo 172.16.64.1
250 mail.huygenslyceum.nl Hello [172.16.64.1], pleased to meet you
~> mail from: mhellwig at xs4all.nl
250 2.1.0 mhellwig at xs4all.nl... Sender ok
~> rcpt to: martin.hellwig at gmail.com
550 5.7.1 martin.hellwig at gmail.com... Relaying denied. IP name lookup 
failed [172.16.64.1]

To get a more verbose explanation, google for smtp + telnet.

hth
-- 
mph



From scott.daniels at acm.org  Wed Feb 22 12:23:12 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Wed, 22 Feb 2006 09:23:12 -0800
Subject: Question about struct.unpack
In-Reply-To: <m2bqwzxywv.fsf@titine.jacoboni.fr>
References: <m2bqwzxywv.fsf@titine.jacoboni.fr>
Message-ID: <43fc9c67$1@nntp0.pdx.net>

Eric Jacoboni wrote:
> Hi,
> 
> To experiment with unpacking, i've written a little C code which
> stores one record in a file. Then, i try to reread this file to unpack
> the record.
> 
> Here's the struct of a record:
> 
> typedef struct {
>       char nom[30];
>       double taille;
>       int age;
>       char plop;
>   } enreg_t;
> 
> The whole size, as given by sizeof() is 48, due to byte alignment.
> ...i've tried "32sdicxxx" to reach the 48 expected... Now it works...
> 
> The same file, re-read with a Ruby script needs a
> str.unpack("Z32dIc").
> 
> So, i don't know why i need to pad the format string in Python. Any
> clue?
> 
> BTW: how to get rid of all this stuff after the \0 in the first field
> in Python? (Ruby has Z and A, but it seems that the Python 's'
> specifier is like 'A' and there is no 'Z' equivalent)

OK, the correct translation of your format is: '30sdic' (size 45) or
'30sdic3x' if you are passing the entire 48-char block.  The reason
it is not size 48 is that '30sdicc' (size 46) in C takes no more room.
the alignment to the end shows up in a C sizeof.

     data = struct.pack('30sdic', 'John Q. Public', 57123.25, 43, 'M')
     nomz, taille, age, plop = struct.unpack('30sdic', data)
     nom = nomz.rstrip('\0')



--Scott David Daniels
scott.daniels at acm.org


From stanc at al.com.au  Sun Feb 12 15:10:49 2006
From: stanc at al.com.au (Astan Chee)
Date: Mon, 13 Feb 2006 07:10:49 +1100
Subject: Small newbie question
In-Reply-To: <1139774104.070375.235480@z14g2000cwz.googlegroups.com>
References: <1139774104.070375.235480@z14g2000cwz.googlegroups.com>
Message-ID: <43EF9649.6070200@al.com.au>



Byte wrote:

>How would I do this: Write a program that simply outputs a ramdom (in
>this case) name of (for this example) a Linux distibution. Heres the
>code ive tryed:
>
>from random import uniform
>from time import sleep
>
>x = 2
>while x < 5:
>    x = uniform(1, 5)
>    if x >= 1 <= 1.999: print 'SuSE'
>    elif x >= 2 <= 2.999: print 'Ubuntu'
>    elif x >= 3 <= 3.999: print 'Mandriva'
>    elif x >= 4 <= 4.999: print 'Fedora'
>    sleep(2)
>  
>
But replace your if statement with this (which is similar), does work:
    if 1 <= x <= 1.999: print 'SuSE'
    elif 2 <= x <= 2.999: print 'Ubuntu'
    elif 3 <= x <= 3.999: print 'Mandriva'
    elif 4 <= x <= 4.999: print 'Fedora'

>It dosnt work: only keep printing SuSE. Please help,
>
>Thanks in advance,
> -- /usr/bin/byte
>
>  
>


From steve at holdenweb.com  Fri Feb 10 14:06:26 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 10 Feb 2006 14:06:26 -0500
Subject: is there a better way?
In-Reply-To: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
Message-ID: <dsio7i$jsg$1@sea.gmane.org>

markscala at gmail.com wrote:
> Problem:
> 
> You have a list of unknown length, such as this: list =
> [X,X,X,O,O,O,O].  You want to extract all and only the X's.  You know
> the X's are all up front and you know that the item after the last X is
> an O, or that the list ends with an X.  There are never O's between
> X's.
> 
> I have been using something like this:
> _____________________
> 
> while list[0] != O:
>     storage.append(list[0])
>     list.pop(0)
>     if len(list) == 0:
>         break
> _____________________
> 
> But this seems ugly to me, and using "while" give me the heebies.  Is
> there a better approach?
> 
> hope this is clear.

  >>> X = "X"
  >>> O = "O"
  >>> def fl(l):
  ...   for i, v in enumerate(l):
  ...     if v == O:
  ...       return l[:i]
  ...   return l
  ...
  >>> fl([X,X,X,X,O,O,O])
['X', 'X', 'X', 'X']
  >>> fl([])
[]
  >>> fl([O])
[]
  >>> fl([X])
['X']
  >>>

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From wverheul at gmail.com  Wed Feb 22 04:30:40 2006
From: wverheul at gmail.com (William)
Date: 22 Feb 2006 01:30:40 -0800
Subject: warning for google api users
In-Reply-To: <mailman.2260.1140549110.27775.python-list@python.org>
References: <mailman.2260.1140549110.27775.python-list@python.org>
Message-ID: <1140600640.412295.250060@z14g2000cwz.googlegroups.com>

Isn't this because the index that the api uses is (a lot) older than
the index used by www.google.com? total results are always estimated,
so they are not reliable (seen the variance)

Gabriel B. schreef:

> the google webservices (aka google API) is not even close for any kind
> of real use yet
>
> if you search for the same term 10 times, you get 3 mixed totals. 2
> mixed result order. and one or two "502 bad gateway"
>
> i did an extensive match agains the API and the regular search
> service. the most average set of results:
>
> results 1-10; total: 373000
> results 11-20; total: 151000
> results 21-30; total: 151000
> results 31-40; total: 373000
> results 41-50; total: 373000
> results 51-60; total: 373000
> results 61-70; total: 151000
> ( 502 bad gateway. retry)
> results 71-80; total: 373000
> results 81-90; total: 151000
> ( 502 bad gateway. retry)
> results 91-100; total: 373000
>
> on the regular google search, total:  2,050,000 (for every page, of
> course)
>
> besides that, the first and third result on the regular google search,
> does not apear in the 100 results from the API in this query, but this
> is not average, more like 1 chance in 10 :-/
>
> So, no matter how much google insists that this parrot is sleeping,
> it's simply dead.
>
>
> now, what i presume that is happening, is that they have a dozen of
> machine pools, and each one has a broken snapshot of the production
> index (probably they have some process to import the index and or it
> explode in some point or they simply kill it after some time). and
> they obviously don't run that process very often.
>
> Now... anyone has some implementation of pygoogle.py that scraps the
> regular html service instead of using SOAP? :)
> 
> Gabriel B.



From didier.prophete at gmail.com  Tue Feb  7 12:37:36 2006
From: didier.prophete at gmail.com (didier.prophete at gmail.com)
Date: 7 Feb 2006 09:37:36 -0800
Subject: jython problem importing a py file
In-Reply-To: <mailman.1553.1139327972.27775.python-list@python.org>
References: <1139297376.961785.146760@g43g2000cwa.googlegroups.com>
	<mailman.1553.1139327972.27775.python-list@python.org>
Message-ID: <1139333856.090963.188130@g47g2000cwa.googlegroups.com>

kz, you are my new hero :-)
thanks a bunch.

-Didier



From gene.tani at gmail.com  Fri Feb 10 07:33:13 2006
From: gene.tani at gmail.com (gene tani)
Date: 10 Feb 2006 04:33:13 -0800
Subject: Is Python good for web crawlers?
In-Reply-To: <7x7j86rh16.fsf@ruckus.brouhaha.com>
References: <1139330008.270988.227170@g44g2000cwa.googlegroups.com>
	<7x1wyekj0n.fsf@ruckus.brouhaha.com>
	<dsb3mg$d99$1@apollon.grec.isp.9tel.net>
	<7x7j86rh16.fsf@ruckus.brouhaha.com>
Message-ID: <1139574793.739195.157090@z14g2000cwz.googlegroups.com>


Paul Rubin wrote:
> Xavier Morel <xavier.morel at masklinn.net> writes:
> > BeautifulSoup...
> > The API of the package is extremely simple, straightforward and... obvious.
>
> I did not find that.  I spent a few minutes looking at the
> documentation and it wasn't obvious at all how to use it.  Maybe I

1. read about Soup and mechanize
http://sig.levillage.org/?p=599

2. flip thru oreilly spidering hacks book (put on YAPH t-shirt)

3. go at your task

4. write Spidering Hacks in Python, 1st edition.  Cite me as
inspiration.



From cito at online.de  Tue Feb 14 18:18:41 2006
From: cito at online.de (Christoph Zwerschke)
Date: Wed, 15 Feb 2006 00:18:41 +0100
Subject: Pythonic gui format?
In-Reply-To: <43f1e919$0$649$636a55ce@news.free.fr>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<43f11990$0$667$626a54ce@news.free.fr>
	<1139923105.939191.200660@z14g2000cwz.googlegroups.com>
	<43f1e919$0$649$636a55ce@news.free.fr>
Message-ID: <dstogi$mml$1@online.de>

bruno at modulix schrieb:
> And finally, you could write your own ordered mapping type - but then
> you loose the builtin syntax...

I still don't understand why so many objected there are no "use cases" 
for ordered dicts when I tried to discuss these in a recent thread... 
Actually I see them everywhere.

-- Christoph


From mikewoodhouse at gmail.com  Fri Feb 24 09:37:27 2006
From: mikewoodhouse at gmail.com (Mike Woodhouse)
Date: 24 Feb 2006 06:37:27 -0800
Subject: make a class instance from a string ?
In-Reply-To: <mailman.2340.1140687820.27775.python-list@python.org>
References: <mailman.1955.1140018042.27775.python-announce-list@python.org>
	<mailman.2340.1140687820.27775.python-list@python.org>
Message-ID: <1140791847.321823.21630@i40g2000cwc.googlegroups.com>

Is there anything particularly bad with

obj = eval(classname + "()")

?

It appears to work, but I'm a noobie so I could be missing something
nasty, in which any edication would be gratefully received.

Mike



From nyamatongwe+thunder at gmail.com  Sun Feb  5 17:53:53 2006
From: nyamatongwe+thunder at gmail.com (Neil Hodgson)
Date: Sun, 05 Feb 2006 22:53:53 GMT
Subject: Thread imbalance
In-Reply-To: <ds55tb$n00$1@bagan.srce.hr>
References: <1138912272.382474.13170@g44g2000cwa.googlegroups.com>	<ds3d35$mo6$2@bagan.srce.hr>
	<mailman.1427.1139097680.27775.python-list@python.org>
	<ds55tb$n00$1@bagan.srce.hr>
Message-ID: <5mvFf.242125$V7.59456@news-server.bigpond.net.au>

Ivan Voras wrote:

> opinion, but by "good threading implementation" I mean that all threads 
> in the application should run "natively" on the underlying (p)threads 
> library at all times, without implicit serialization. For example, Java 
> and perl do this, possibly also lua and C#. 

    Lua has coroutines rather than threads. It can cooperate with 
threading implemented by a host application or library.

    See the coroutines chapter in
http://www.lua.org/pil/index.html

    Neil


From johnjsal at NOSPAMgmail.com  Mon Feb 13 16:33:20 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 13 Feb 2006 21:33:20 GMT
Subject: cyclic data structures
In-Reply-To: <Xns9769D817395EBduncanbooth@127.0.0.1>
References: <Nc6If.1604$No6.38177@news.tufts.edu>
	<mailman.1858.1139863851.27775.python-list@python.org>
	<fu6If.1607$No6.37915@news.tufts.edu>
	<Xns9769D817395EBduncanbooth@127.0.0.1>
Message-ID: <AW6If.1610$No6.38089@news.tufts.edu>

Duncan Booth wrote:

> The append method modifies the list in place. 

That's the key that unlocked the mystery for me.  ;)


From onurb at xiludom.gro  Fri Feb  3 12:11:38 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Fri, 03 Feb 2006 18:11:38 +0100
Subject: problems writing tuple to log file
In-Reply-To: <1138980476.469673.254090@g44g2000cwa.googlegroups.com>
References: <1138980476.469673.254090@g44g2000cwa.googlegroups.com>
Message-ID: <43e38edf$0$26572$636a55ce@news.free.fr>

localpricemaps at gmail.com wrote:
> i am having a problem writing a tuple to a text file.  my code is
> below.

I'd rather say you are having a problem with logic.

> what i end up getting is a text file that looks like this
> 
> burger, 7up
> burger, 7up
> burger, 7up

Which is exactly what one would expect (in the best case...) given the
code you've written.

> and this is instead of getting a list that should look like this
> 
> burger, 7up
> fries ,coke
> cake ,milk
> 
> 
> however there is something faulty in my writing of the tuple to the
> text file. 

Nope, the problem is elsewhere.

> perhaps related to the indentation that causes it to write
> the same stuff over and over?

You clearly have a problem with indentation (hint : use spaces not
tabs), but this is not the cause of your problem.

> 
> 
>     for row in bs('div'):
> 
> 	data=[]
> 
> 	for incident in bs('span'):
>         	foodlist = []

Do you understand that this reinitialise foodlist on each iteration ?

> 		b = incident.findPrevious('b')
> 		for oText in b.fetchText( oRE):
>             		#foodlist.append(oText.strip() + "',")
> 				foodlist += oText.strip() + "','"

Concatening a string to a list may not exactly do what you think. Try
printing foodlist, you'll be surprised.

> 		food = ''.join(foodlist)

Do you understand that this overwrite 'food' on each iteration ?

> 		print food
> 

> 
> 	for incident in bs('span2'):
>         	drinklist = []

Same observation as above

> 		for oText in incident.fetchText( oRE):
>             		drinklist += oText.strip() + "','"

idem

> 		drink = ''.join(drinklist)

idem

> 		print drink
> 
> 
> 
> 
>         tuple = (food + drink "\n")

1/ dont use 'tuple' as an identified, it shadows the builtin type tuple.
2/ anyway, this is *not* a tuple. What you get here is a string made of
the concatenation of the actual values of food and drink plus a newline.

Ok, at this stage, the name 'food'  *may* exist, in which case it'll be
bound to the value found for the last iteration of the first 'for' loop.
Note that it may also not exist at all, if bs('span') returns an empty
sequence - in which case you'll get a nice NameError exception. Same for
'drink' of course.


>         data.append(tuple)

Why to you append this to a list that you don't use ?

>       f = open("data.txt", 'a')

This may fail. Please use a try/except block.

>       f.write ( ''.join( tuple ) )


And please close the file once done.


Your code is such a mess that it's difficult to know for sure what
you're trying to do - and you don't provide much context (hint : when
asking for help, try and post the minimal *runnable* code that exhibit
your problem - 'runnable' meaning that anyone can run your snippet in
it's python interpreter).

What follows is an attempt at rewriting the whole damn thing so it as at
least a chance to behave sensibly - I wouldn't bet that this actually
what you *should* write but I hope this may help you understand where
your errors are. But please dont ask for further help on this code
before you've folowed a good (preferably programming-newbie oriented)
Python tutorial ('learning to think like a computer scientist' may be a
wise choice).

# -----
data=[]
for row in bs('div'):
  foodlist = []
  for incident in bs('span'):
    b = incident.findPrevious('b')
    for oText in b.fetchText( oRE):
      foodlist.append(oText.strip())

  drinklist = []
  for incident in bs('span2'):
    for oText in incident.fetchText( oRE):
      drinklist.append(oText.strip())
  # I suppose you expect to have 1 drink for 1 food
  assert len(foodlist) == len(drinklist)
  pairs = zip(foodlist, drinklist)
  data += pairs

try:
  f = open("data.txt", 'a')
except IOError, e:
  # handle error here
  print "oops, failed to open 'data.txt' : %s" % e
else:
  f.write("\n".join(["%s, %s" % pair for pair in data])
  f.close()

# -----


A last advice : Python comes with an interactive interpreter, which is a
real powertool for learning, testing and debugging. So *use it*.

HTH
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From kay.schluehr at gmx.net  Mon Feb 20 16:38:48 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 20 Feb 2006 13:38:48 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<yfspsljp321.fsf@oc.ex.ac.uk>
	<1140441519.702761.326130@g14g2000cwa.googlegroups.com>
	<pan.2006.02.20.21.05.17.947577@REMOVETHIScyber.com.au>
Message-ID: <1140471528.655265.312730@f14g2000cwb.googlegroups.com>

Steven D'Aprano wrote:
> On Mon, 20 Feb 2006 05:18:39 -0800, Kay Schluehr wrote:
>
> >> What's far more interesting to me, however, is that I think there a good
> >> reasons to suspect python's slowness is more of a feature than a flaw: I'd not
> >> be suprised if on the whole it greatly increases programmer productivity and
> >> results in clearer and more uniform code.
> >
> > Yes, it's Guidos master-plan to lock programmers into a slow language
> > in order to dominate them for decades. Do you also believe that Al
> > Quaida is a phantom organization of the CIA founded by neocons in the
> > early '90s who planned to invade Iraq?
>
> Of course not. The alternative, that Osama has been able to lug his
> dialysis machine all over the Pakistan and Afghan mountains without being
> detected for four years is *much* more believable. *wink*

Osama? Who is Osama? A media effect, a CNN invention.

> I don't think it was the poster's implication that Guido deliberately
> created a slow language for the sake of slowness. I think the implication
> was more that Guido made certain design choices that increased
> productivity and code clarity. (That much is uncontroversial.) Where the
> poster has ruffled some feathers is his suggestion that if Guido had only
> known more about the cutting edge of language design from CS, Python would
> have been much faster, but also much less productive, clear and popular.
>
> I guess the feather ruffling is because of the suggestion that Guido
> merely _didn't_know_ about language features that would have increased
> Python's speed at the cost of productivity, rather than deliberately
> choose to emphasis productivity at the expense of some speed.
>
>
>
> --
> Steven.

Alexanders hypothesis is completely absurd. It turned out over the
years that capabilities of Python optimization are lower than those of
Lisp and Smalltalk. But its a system effect and epiphenomenon of
certain design decisions. This might change with PyPy - who knows? The
Lisp/Smalltalk design is ingenious, radical and original and both
languages were considered too slow for many real-world-applications
over decades. But no one has ever claimed that Alan Kay intentionally
created a slow language in order to hold the herd together - and it
accidentally turned out to be reasonably fast with JIT technology in
the late 90s.

Smalltalk was killed by Java while Lisp was killed by the paradigm
shift to OO in the early 90s. The IT world has absolutely no interest
in the hobby horses of computer scientists or language lovers (like
me). It consolidates in direction of a small set of Algol successors
namely C,C++,Java and C# and some dynamically typechecked languages
like Perl, Python and Ruby that play nice with the bold mainstream
languages as their more flexible addition. A conspiracy like theory
used to explain what's going on is needless.

Kay



From scott.daniels at acm.org  Mon Feb 27 11:28:43 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Mon, 27 Feb 2006 08:28:43 -0800
Subject: making 'utf-8' default codec
In-Reply-To: <MPG.1e6d0bea15971bcb989832@news.htnet.hr>
References: <MPG.1e6d0bea15971bcb989832@news.htnet.hr>
Message-ID: <440326ff@nntp0.pdx.net>

Nikola Skoric wrote:
> Is there a way of making 'utf-8' default codec for the whole program, so 
> I don't have to do .encode('utf-8') every time I print out a string?

Explicit is better than implicit (so setting up a default codec is
considered bad practice).  However, you could wrap an output destination
with an encoder and get the effect you want.

     import sys, codecs
     sys.stdout, _held = (codecs.getwriter('utf-8')(sys.stdout),
                          sys.stdout)

--Scott David Daniels
scott.daniels at acm.org


From bearophileHUGS at lycos.com  Fri Feb 24 21:26:52 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 24 Feb 2006 18:26:52 -0800
Subject: Pure python implementation of string-like class
In-Reply-To: <mailman.2417.1140830817.27775.python-list@python.org>
References: <mailman.2417.1140830817.27775.python-list@python.org>
Message-ID: <1140834412.120429.307300@i40g2000cwc.googlegroups.com>

Maybe you can create your class using an array of 'L' with the array
standard module.

Bye,
bearophile



From dan at wolf.com  Mon Feb  6 16:30:06 2006
From: dan at wolf.com (Dan M)
Date: Mon, 06 Feb 2006 13:30:06 -0800
Subject: script to read emails and extract attachments from cron
References: <1139252243.663682.168160@f14g2000cwb.googlegroups.com>
Message-ID: <pan.2006.02.06.21.30.05.13086@wolf.com>

On Mon, 06 Feb 2006 10:57:23 -0800, JohnRHarlow at gmail.com wrote:

> Hi:
> 
> I am looking for advice on the best way to set up a process to read
> incoming emails (from a normal unix mailbox on the same host)
> containing a gzipped telemetry attachment. I'd like the script to
> extract the attachment into a directory where another process will pick
> it up. I plan to run it every minute out of cron, so it would probably
> start by moving the mbox file to another name so that incoming emails
> and later instances of itself won't be affected.

You might want to take a look at
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/86675 and
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/86676

I'm using those two recipes for a project very similar to what you
described.

Dan


From peter at engcorp.com  Tue Feb 14 09:53:37 2006
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 14 Feb 2006 09:53:37 -0500
Subject: listing attributes
In-Reply-To: <pan.2006.02.14.11.03.42.625075@REMOVETHIScyber.com.au>
References: <1139884643.749492.221140@g43g2000cwa.googlegroups.com>	<mailman.1876.1139887198.27775.python-list@python.org>
	<pan.2006.02.14.11.03.42.625075@REMOVETHIScyber.com.au>
Message-ID: <dssqtg$j8l$1@sea.gmane.org>

Steven D'Aprano wrote:
> On Mon, 13 Feb 2006 22:18:56 -0500, Peter Hansen wrote:
>>Thomas Girod wrote:
>>>I'm trying to get a list of attributes from a class. The dir() function
>>>seems to be convenient, but unfortunately it lists to much - i don't
>>>need the methods, neither the built-in variables.
>>>
>>>In fact, all my variables are referencing to objects of the same type.
>>>Can anyone suggest me a way to get this list of variables ?
>>
>>Does the __dict__ attribute help you?  (Try viewing obj.__dict__ at the 
>>interpreter prompt and see if it has what you expect. 
>>obj.__dict__.keys() would be just the names of those attributes.)
> 
>>>>Parrot.__dict__.keys()
> 
> ['__module__', 'ATTR', 'method', '__dict__', '__weakref__', '__doc__']
> 
> So I guess the answer to that question is, while __dict__ gives less
> information than dir, it still gives too much.

I was making the perhaps mistaken assumption that the OP was another of 
those who meant "object" when he said "class" (though I could perhaps 
have asked that explicitly).

If that were the case, I think __dict__ could be what he wanted.  (I'm 
still not sure what he wanted, even after reading his response, since I 
can't see what his classes or objects look like...)

 >>> class Parrot(object):
...   ATTR = None
...   def method(self):
...     return None
...
 >>> polly = Parrot()
 >>> polly.foo = '1'
 >>> polly.bar = 'baz'
 >>> polly.__dict__
{'foo': '1', 'bar': 'baz'}

-Peter



From neuzhoundxx at yahoo.com  Mon Feb 13 16:33:55 2006
From: neuzhoundxx at yahoo.com (john peter)
Date: Mon, 13 Feb 2006 13:33:55 -0800 (PST)
Subject: FOLLOW-UP how to use RotatingFileHandler
In-Reply-To: <20060213212722.92234.qmail@web36701.mail.mud.yahoo.com>
Message-ID: <20060213213355.95996.qmail@web36709.mail.mud.yahoo.com>

the fix was to specify handler.RotatingFileHandler
   
  does RotatingFileHandler work with Windows XP? 

john peter <neuzhoundxx at yahoo.com> wrote:
    Hi!
   
  I have the following logging.conf :
  [loggers]
keys=root
   
  [handlers]
keys=roth
   
  [formatters]
keys=simpleFormatter
   
  [logger_root]
level=INFO
handlers=roth
   
  [handler_roth]
class=RotatingFileHandler
level=INFO
formatter=simpleFormatter
args=('adssim.log','w', 200, 4)
   
  [formatter_simpleFormatter]
format=%(asctime)s - %(message)s
datefmt=
   
  and sampleLogging.py script:
    import logging
  import logging.config
  logging.config.fileConfig("logging.conf")
  logger = logging.getLogger("root")
  for i in xrange(0, 5000):
  logger.debug("debug message %s" % i)
  logger.info("info message %s" % i)
  logger.warn("warn! message %s" % i)
  logger.error("error message %s" % i)
  logger.critical("critical message %s" % i)
   
  for some reason, i keep getting the following error message:
  C:\adssim1>python sampleLogging.py
Traceback (most recent call last):
  File "C:\Python24\lib\logging\config.py", line 157, in fileConfig
    log.addHandler(handlers[hand])
KeyError: 'roth'
No handlers could be found for logger "root"
   
  when i did a help(logging) on the logging module, i don't see RotatingFileHandler.
  Could somebody please help? Thanks!

    
---------------------------------
  
What are the most popular cars? Find out at Yahoo! Autos -- 
http://mail.python.org/mailman/listinfo/python-list  


		
---------------------------------
 Yahoo! Autos. Looking for a sweet ride? Get pricing, reviews, & more on new and used cars.
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From max at alcyone.com  Mon Feb 13 21:29:40 2006
From: max at alcyone.com (Erik Max Francis)
Date: Mon, 13 Feb 2006 18:29:40 -0800
Subject: how do you pronounce 'tuple'?
In-Reply-To: <dsqtq7$mju$1@online.de>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
	<mailman.1857.1139863723.27775.python-list@python.org>
	<Wj6If.1606$No6.38150@news.tufts.edu> <dsqtq7$mju$1@online.de>
Message-ID: <ieGdnfpVlNsJ3WzenZ2dnUVZ_t2dnZ2d@speakeasy.net>

Peter Maas wrote:

> tuples are of latin origin, so one can derive the tuple words
> systematically:
> 
> Latin             n-tuple
> ---------------------------
> ...               ...
> triplex           triple
> duplex            duple
> simplex           simple

Yeah but there's already plenty of existing English usage such that 
3-tuple : triple :: 2-tuple : pair.  (A 2-tuple is an "ordered pair" in 
mathematics.)  If a 2-tuple is a pair, then it would seem to follow that 
a 1-tuple is a single.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   Whatever it is you came to teach me / I am here to learn it
   -- India Arie


From donn at u.washington.edu  Fri Feb 17 19:12:10 2006
From: donn at u.washington.edu (Donn Cave)
Date: Fri, 17 Feb 2006 16:12:10 -0800
Subject: Exiting os.spawnv's subroutine
References: <1140215299.383562.57250@g14g2000cwa.googlegroups.com>
Message-ID: <donn-8A2493.16121017022006@gnus01.u.washington.edu>

In article <1140215299.383562.57250 at g14g2000cwa.googlegroups.com>,
 "IamIan" <iansan at gmail.com> wrote:

> I am using os.spawnv in Python 2.1 to do some geoprocessing in a
> subroutine/process. Everything works great, except when the processing
> is done the subroutine just waits for a couple minutes before closing
> itself and returning to the main script. I have tried using sys.exit()
> and exit() but these aren't doing anything.
> 
> What is the proper way to terminate this subroutine upon completion,
> rather than waiting? Thank you.

Your description is a little ambiguous, but my guess is your
process just isn't done when you think it is.   It's flushing
data to disk or something like that.  Or it could be something
else.  Why don't you write a sample program that works like
this, and demonstrates the problem, and then we'll know.

   Donn Cave, donn at u.washington.edu


From userprogoogle-139 at yahoo.co.uk  Thu Feb  9 07:46:21 2006
From: userprogoogle-139 at yahoo.co.uk (rodmc)
Date: 9 Feb 2006 04:46:21 -0800
Subject: Curios issues with Editors
References: <1139487823.219867.71790@z14g2000cwz.googlegroups.com>
	<mailman.1656.1139488176.27775.python-list@python.org>
Message-ID: <1139489181.944396.101710@o13g2000cwo.googlegroups.com>

As I said I am most likely to have made an error, being a newbie and
all that. Here is the offending function. I said i would not post
source code but there you go...

As I said I plan to change this function, so it will no doubt be out of
date quite soon.

def senddata(msg):
    host = "localhost"
    port = 21568
    buf = 1024
    addr = (host,port)

    UDPSock = socket(AF_INET,SOCK_DGRAM)
    UDPSock.sendto(msg,addr)
    UDPSock.close()

cheers,

rod



From andychambers2002 at yahoo.co.uk  Tue Feb  7 08:51:40 2006
From: andychambers2002 at yahoo.co.uk (andychambers2002 at yahoo.co.uk)
Date: 7 Feb 2006 05:51:40 -0800
Subject: Natural Language Date Processing.
References: <mailman.1544.1139316354.27775.python-list@python.org>
Message-ID: <1139320300.289408.177590@g14g2000cwa.googlegroups.com>

>From the docs for PHP's 'strtotime'

Parameters

time
The string to parse, according to the GNU Date Input Formats syntax.
Before PHP 5.0, microseconds weren't allowed in the time, since PHP 5.0
they are allowed but ignored.
...

It seems that the string to be parsed has to be provided in the GNU
date format.  One option would be to provide a function that calls out
to the the GNU date program with whatever string you want to parse.

I'm not aware of an existing function in Python that does this.

Regards,
Andy



From jstroud at ucla.edu  Mon Feb 13 17:38:38 2006
From: jstroud at ucla.edu (James Stroud)
Date: Mon, 13 Feb 2006 14:38:38 -0800
Subject: Pythonic gui format?
In-Reply-To: <dsqocq$dcq$1@bagan.srce.hr>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<dsqocq$dcq$1@bagan.srce.hr>
Message-ID: <dsr1pf$egj$1@daisy.noc.ucla.edu>

Ivan Voras wrote:
> Gregory Petrosyan wrote:
>> But after reading "Python Is Not Java"
>> http://dirtsimple.org/2004/12/python-is-not-java.html  (BTW I'm not a
>> Java programmer) I realised that it is actually not cute at all :) (am
>> I wrong here?)
>
> Don't do that :)
> 
> Don't listen to recommendations for or against a technology based only 
> on vague "this is not how we do things around here" reasons.

The reasons given in the blog were fairly precise. I think "only on 
vague[...]" is misleading here. The idea of the article was to educate a 
Java user how to change his or her frame of reference to better use Python.

The author was not being territorial as you are implying.


From paul at boddie.org.uk  Mon Feb 20 17:21:27 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 20 Feb 2006 14:21:27 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<mailman.2131.1140377578.27775.python-list@python.org>
	<yfsbqx3ov29.fsf@oc.ex.ac.uk> <eq7pc3-ml5.ln1@lairds.us>
	<7cjpc3-2a.ln1@lairds.us> <87irr967e7.fsf@wilson.homeunix.com>
Message-ID: <1140474087.629454.38010@g43g2000cwa.googlegroups.com>

Torsten Bronger wrote:
>
> By the way, this is my main concern about optional static typing: It
> may change the target group, i.e. it may move Python closer to those
> applications where speed really matters, which again would have an
> effect on what will be considered Pythonic.

Yes, I think that with optional static typing, it's quite likely that
we would see lots of unnecessary declarations and less reusable code
("ints everywhere, everyone!"), so I think the point about not
providing people with certain features is a very interesting one, since
people have had to make additional and not insignificant effort to
optimise for speed. One potential benefit is that should better tools
than optional static typing be considered and evaluated, the "ints
everywhere!" line of thinking could prove to be something of a dead end
in all but the most specialised applications. Consequently, the Python
platform could end up better off, providing superior tools for
optimising performance whilst not compromising the feel of the language
and environment.

Paul



From lycka at carmen.se  Tue Feb 21 14:11:01 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Tue, 21 Feb 2006 20:11:01 +0100
Subject: Mutable numbers
In-Reply-To: <dteele$9pi$1@home.itg.ti.com>
References: <dteele$9pi$1@home.itg.ti.com>
Message-ID: <dtfok6$uo7$1@wake.carmen.se>

Suresh Jeevanandam wrote:
> # I am new to python.
[...]
> In any application most of the operation is numerical. So, i think, we 
> should get a good speed advantage with the availability of mutable 
> numbers. What do you think ?

If you are new to Python, I think you should try to learn how to
use it well, and rest assured that the smart people who have been
working on it for 15 years have done a pretty good job at making
it perform well, with respect to the basic design decisions.

Runtime performance has never been the prime goal for Python. It's
always been more important with clarity, easy of use and programmer
productivity. CPUs get faster and faster, but programmers don't get
smarter and smarter...

Still, it's quite possible to write very capable programs in Python.
For intense number crunching, it's often helpful to use some good
library written in C though, whether it's NumPy or some cryptographic
library.


From deets at nospam.web.de  Sat Feb 18 05:50:28 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 18 Feb 2006 11:50:28 +0100
Subject: GDI in python>?
In-Reply-To: <1140242543.204760.174390@g44g2000cwa.googlegroups.com>
References: <1140242543.204760.174390@g44g2000cwa.googlegroups.com>
Message-ID: <45ocfkF7m4mmU1@uni-berlin.de>

al pacino schrieb:
> hi,
> 
> is it possible to address the  'screen pixels' using python , like
> analogous to older dos( functions that graphics.h provides') or win api
> calls for gdi.


Use one of the available GUI-Toolkits - Tkinter is included already. Or 
pygame.

Diez


From gregpinero at gmail.com  Wed Feb 15 19:29:40 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Wed, 15 Feb 2006 19:29:40 -0500
Subject: How to import a module with spaces in the name
In-Reply-To: <MoNIf.11899$MJ.9067@fed1read07>
References: <mailman.1970.1140039404.27775.python-list@python.org>
	<MoNIf.11899$MJ.9067@fed1read07>
Message-ID: <312cfe2b0602151629x3c1e0cc4p5d1f74eef3101cf1@mail.gmail.com>

Thanks, that did work!


On 2/15/06, Farshid Lashkari <lashkariNO at spamworldviz.com> wrote:
> Gregory Pi?ero wrote:
> > Let's say I have a module named "Excellent Module.py"
>
> ExcellentModule = __import__('Excellent Module')
>
> -Farshid
> --
> http://mail.python.org/mailman/listinfo/python-list
>


--
Gregory Pi?ero
Chief Innovation Officer
Blended Technologies
(www.blendedtechnologies.com)


From ralf at tecont.de  Fri Feb 17 09:29:28 2006
From: ralf at tecont.de (Ralf Muschall)
Date: Fri, 17 Feb 2006 15:29:28 +0100
Subject: Determing whether two ranges overlap
In-Reply-To: <pan.2006.02.16.15.22.15.647369@digital-crocus.com>
References: <pan.2006.02.16.15.22.15.647369@digital-crocus.com>
Message-ID: <973hc3-vi7.ln1@prcm.tecont.de>

Robin Haswell wrote:

> I can think of lots of ways to do this but it's in a tight loop so I need
> it to be as efficient as possible. Any help welcome :-)

There are 24 possibilities of having 4 numbers in a row, and
the following 6 of them describe nonempty intervals (the remaining
18 are obtained by reversing the endpoints of one or both
intervals, thereby making them empty):

# separate
a0 a1 b0 b1
b0 b1 a0 a1

# inside
a0 b0 b1 a1
b0 a0 a1 b1

# cross
a0 b0 a1 b1
b0 a0 b1 a1

The simplest is to exclude the first pair, i.e.

not (a1<b0 or b1<a0)

which simplifies to
a1>=b0 and b1>=a0, given by Fredrik without proof ;-)

You will have to decide whether you want ">" or ">="
(beware of the former when using floats).

If you cannot assume that the pairs are in order, this
will break.

Ralf


From roy at panix.com  Fri Feb 24 08:03:49 2006
From: roy at panix.com (Roy Smith)
Date: Fri, 24 Feb 2006 08:03:49 -0500
Subject: A C-like if statement
References: <hp-dnY20cusOnGPeRVn-rg@nmt.edu> <dtl04p$5q2$1@reader2.panix.com>
	<sdadnS6nfNnbmmPeRVn-sw@nmt.edu>
	<pan.2006.02.23.22.14.53.56541@REMOVETHIScyber.com.au>
	<1140742149.011750.321530@z34g2000cwc.googlegroups.com>
	<pan.2006.02.24.09.58.32.497698@REMOVETHIScyber.com.au>
	<1140775322.788083.256970@v46g2000cwv.googlegroups.com>
	<pan.2006.02.24.11.07.19.764837@REMOVETHIScyber.com.au>
Message-ID: <roy-5A1B56.08034924022006@reader2.panix.com>

In article <pan.2006.02.24.11.07.19.764837 at REMOVETHIScyber.com.au>,
 Steven D'Aprano <steve at REMOVETHIScyber.com.au> wrote:

> Side-effects aren't always bad (import, for example, does all its work by
> side-effect). But they are generally frowned upon, and in functional
> languages they are verboten.

How do you do any I/O in a functional language if side effects are 
verboten?  For that matter, how does a functional program ever stop running?


From jmdeschamps at gmail.com  Sun Feb  5 22:37:51 2006
From: jmdeschamps at gmail.com (jmdeschamps at gmail.com)
Date: 5 Feb 2006 19:37:51 -0800
Subject: Newbie Help!
In-Reply-To: <1haar54.1x8exat19f77b3N%aleaxit@yahoo.com>
References: <43e6a1d4$0$6951$ed2619ec@ptn-nntp-reader02.plus.net>
	<1haar54.1x8exat19f77b3N%aleaxit@yahoo.com>
Message-ID: <1139197071.595563.8380@o13g2000cwo.googlegroups.com>


Alex Martelli wrote:
> Stephen <saunders2005 at plusdsl.net> wrote:
>
> > Hi All,
> >         im new to python i just have a few questions and was wondering if
> > you could help me??
> >
> > 1. what programming langaugue does python use? or which is most popular?
>
> Python _is_ a programming language, so your question is not clear.  If
> you're asking what languages are used to implement Python, that's C (for
> the mainstream version), Java (for Jython), C# (for IronPython), and
> Python itself (for PyPy).
>
> > 2. Does anyone know where i could get hold of practice code
>
> http://aspn.activestate.com/ASPN/Python/Cookbook/ -- but much of it may
> be a bit advanced for a beginner.
>
> > 3. Any good ebooks or links to start with. (according to the web this is the
> > best place to start.)
>
> http://wiki.python.org/moin/BeginnersGuide lists many.
>
> > i know you probally get asked these questions all the time! but im trying to
> > mirgrate for windows to linux.
>
> Python runs on Windows, Linux, Mac (where it comes with the OS, but then
> that's also true of many Linux distros), and elsewhere.
>
>
> Alex

Just so you can grasp what this means (because C++ also has Windows,
Linux and Mac implementation...), the SAME Python source code,
including GUI parts (Tkinter*, in my case) run directly in all of them.


*it's plain jane GUI, it doesn't do Aqua!

jean-marc



From sleepylight at gmail.com  Thu Feb  2 12:41:20 2006
From: sleepylight at gmail.com (sleepylight)
Date: 2 Feb 2006 09:41:20 -0800
Subject: Starting terminal applications from within python
In-Reply-To: <mailman.1356.1138900812.27775.python-list@python.org>
References: <1138899294.111613.151980@g49g2000cwa.googlegroups.com>
	<mailman.1356.1138900812.27775.python-list@python.org>
Message-ID: <1138902080.060259.198320@z14g2000cwz.googlegroups.com>

Ah!  I see now.  That makes prefect sense.  I guess I was thinking that
python was simply going to pass a whole command string to the program
rather than give each argument as individual strings.  Seeing this
makes the documentation seem much more sensible.  Thank you!



From franz.steinhaeusler at gmx.at  Mon Feb 27 04:52:57 2006
From: franz.steinhaeusler at gmx.at (Franz Steinhaeusler)
Date: Mon, 27 Feb 2006 10:52:57 +0100
Subject: wxPython: help(wx) causes segfaulting?
References: <mailman.2457.1140992731.27775.python-list@python.org>
Message-ID: <usi502h2ltmbvt7e58blv4hhsitseg565u@4ax.com>

On Sun, 26 Feb 2006 10:35:13 -0600, Tim Chase
<python.list at tim.thechases.com> wrote:

>Trying to get my feet wet with wxPython (moving from just 
>command-line apps), I tried the obvious (or, at least to me 
>was obvious):
>
>Start python, "import wx" and then do a "help(wx)" to see 
>what it can tell me.
 
I tried it on Windows Xp, and I got also a traceback:

>>> help (wx)
Traceback (most recent call last):
  File "<input>", line 1, in ?
  File "C:\Python24\lib\site.py", line 328, in __call__
    return pydoc.help(*args, **kwds)
  File "C:\Python24\lib\pydoc.py", line 1640, in __call__
    self.help(request)
  File "C:\Python24\lib\pydoc.py", line 1684, in help
    else: doc(request, 'Help on %s:')
  File "C:\Python24\lib\pydoc.py", line 1468, in doc
    pager(title % desc + '\n\n' + text.document(object, name))
  File "C:\Python24\lib\pydoc.py", line 296, in document
    if inspect.ismodule(object): return self.docmodule(*args)
  File "C:\Python24\lib\pydoc.py", line 1070, in docmodule
    contents.append(self.document(value, key, name))
  File "C:\Python24\lib\pydoc.py", line 297, in document
    if inspect.isclass(object): return self.docclass(*args)
  File "C:\Python24\lib\pydoc.py", line 1194, in docclass
    lambda t: t[1] == 'method')
  File "C:\Python24\lib\pydoc.py", line 1144, in spill
    name, mod, object))
  File "C:\Python24\lib\pydoc.py", line 298, in document
    if inspect.isroutine(object): return self.docroutine(*args)
  File "C:\Python24\lib\pydoc.py", line 1255, in docroutine
    doc = getdoc(object) or ''
  File "C:\Python24\lib\pydoc.py", line 76, in getdoc
    result = inspect.getdoc(object) or inspect.getcomments(object)
  File "C:\Python24\lib\inspect.py", line 448, in getcomments
    lines, lnum = findsource(object)
  File "C:\Python24\lib\inspect.py", line 437, in findsource
    if pat.match(lines[lnum]): break
IndexError: list index out of range

-- 
Franz Steinhaeusler


From tjreedy at udel.edu  Sat Feb 11 15:40:49 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 11 Feb 2006 15:40:49 -0500
Subject: Too Many if Statements?
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>	<6e2iu1hdb8fvlfkcuulloiiq1khlbhret1@4ax.com>	<1139517959.741090.28560@g14g2000cwa.googlegroups.com>	<dshvb4$jfn$1@wake.carmen.se><1139583025.428875.225500@g14g2000cwa.googlegroups.com>
	<dsid2f$b99$1@sea.gmane.org>
Message-ID: <dsli54$urf$1@sea.gmane.org>


"Steve Holden" <steve at holdenweb.com> wrote in message 
news:dsid2f$b99$1 at sea.gmane.org...
> Clearly it would be a good idea to remove whatever problem is causing
> the error,

The problem (see my post of the com_backpatch code) is writing a compound 
statement (here a for loop) with a body so large as to require a jump of 
more than 64K bytes in the compiled bytecode (ie, from the test at the top 
of the loop to the code that follows after the loop).  Until the jump limit 
is raised (likely a long wait ;-), the OP must factor some of the code out 
of the loop.

Terry Jan Reedy







From gh at ghaering.de  Wed Feb 15 12:23:04 2006
From: gh at ghaering.de (=?ISO-8859-1?Q?Gerhard_H=E4ring?=)
Date: Wed, 15 Feb 2006 18:23:04 +0100
Subject: Clarity: GIL, processes and CPUs etc
In-Reply-To: <1140022815.751692.313990@g47g2000cwa.googlegroups.com>
References: <1140022815.751692.313990@g47g2000cwa.googlegroups.com>
Message-ID: <43F36378.5050104@ghaering.de>

adsheehan at eircom.net wrote:
> I have been reading many of the posting on the GIL and impact on 
> threading etc. I have found is confusing and would welcome some
> clarity on this.
> 
> I understand that embedding the interpreter in a C/C++ application 
> limits it to one CPU. If the application is multi-threaded (system
> threads) in will not use additional CPUs as the interpreter is tied
> to one CPU courtesy of the GIL. True or False?

True. More than one CPU can be used if the GIL is released during calls 
to external libraries, though. Well-written C extension modules and the 
Python standard library do this where appropriate. Still only one thread 
can execute pure Python code at a time.

> I understand that forking or running multiple process instances of the
> above application would make use of multiple CPUs. This is because each
> process would have its own interpreter and GIL that is independent of
> any other process.
> True or False? [...]

True.

HTH,

-- Gerhard


From ivoras at fer.hr  Sun Feb  5 10:33:11 2006
From: ivoras at fer.hr (Ivan Voras)
Date: Sun, 05 Feb 2006 16:33:11 +0100
Subject: Thread imbalance
In-Reply-To: <mailman.1427.1139097680.27775.python-list@python.org>
References: <1138912272.382474.13170@g44g2000cwa.googlegroups.com>	<ds3d35$mo6$2@bagan.srce.hr>
	<mailman.1427.1139097680.27775.python-list@python.org>
Message-ID: <ds55tb$n00$1@bagan.srce.hr>

Peter Hansen wrote:

> Ivan, what makes you say that Python is bad for threads?  Did the 
> qualifcation "concurrently executing/computing" have some significance 
> that I missed?

Because of the GIL (Giant interpreter lock). It can be a matter of 
opinion, but by "good threading implementation" I mean that all threads 
in the application should run "natively" on the underlying (p)threads 
library at all times, without implicit serialization. For example, Java 
and perl do this, possibly also lua and C#. Python and Ruby have a giant 
interpreter lock which prevents two threads of pure python code (not 
"code written in C" :)) ) in one interperter process executing at the 
same time.

Much can be said about "at the same time" part, but at least in one case 
it is unambiguous: in multiprocessor machines. Someone writing a 
multithreaded server application could get in trouble if he doesn't know 
this (of course, it depends on the exact circumstances and the purpose 
of the application; for example system calls which block, such as read() 
and write() can execute concurrently, while two "while True: pass" 
threads cannot). This is not new information, it's available in many 
forms in this newsgroup's archives.

I think it would also make implicit problems in the situation like that 
of the OP, where there's a "watchdog" thread monitoring some job or 
jobs, and the job(s) intefere(s) with the GIL by contenting for it, 
possibly when there are lots of threads or frequent spawning of 
processes or threads.

I don't have the intention to badmouth Python, but to emphasize that one 
should be familira with all the details of the tool one's using :)


From iainking at gmail.com  Fri Feb 10 09:40:34 2006
From: iainking at gmail.com (Iain King)
Date: 10 Feb 2006 06:40:34 -0800
Subject: Create dict from two lists
In-Reply-To: <1139581243.360298.164070@g43g2000cwa.googlegroups.com>
References: <1139579518.129742.265680@o13g2000cwo.googlegroups.com>
	<453k9eF444frU1@uni-berlin.de>
	<dsi70h$48e$1@aphrodite.grec.isp.9tel.net>
	<1139581243.360298.164070@g43g2000cwa.googlegroups.com>
Message-ID: <1139582434.128805.148730@o13g2000cwo.googlegroups.com>


py wrote:
> Thanks, itertools.izip and just zip work great.  However, I should have
> mentioned this, is that I need to keep the new dictionary sorted.
>
> d = {1:'first', -5 : 'negative 5', 6:'six', 99:'ninety-nine',
> 3:'three'}
> keys = d.keys()
> keys.sort()
> vals = map(d.get, keys)
>
> At this point keys is sorted [-5, 1, 3, 6, 99] and vals is sorted
> ['negative 5', 'first', 'three', 'six', 'ninety-nine']
>
> Using zip does not create the dictionary sorted in this order.
> new_d = dict(zip(keys, vals))
>
> How can I use the two lists, keys and vals to create a dictionary such
> that the items keep their order?
>
> Thanks.

Short answer - you can't.  Dictionaries aren't sequential structures,
so they have no sorted form.  You can iterate through it in a sorted
manner however, as long as you keep your list of keys:

keys.sort()
for k in keys:
    print d[k]

Iain



From anand.pasoria at in.bosch.com  Mon Feb 13 03:10:56 2006
From: anand.pasoria at in.bosch.com (Anand)
Date: Mon, 13 Feb 2006 13:40:56 +0530
Subject: How To Call A DLL?
Message-ID: <dspeuk$c7c$1@ns2.fe.internet.bosch.com>

Greetings,

Can I get a code snippet of how to call a DLL and it's functionalities from
Python?

Thanks for your help.

Best regards,
Anand




From me at privacy.net  Wed Feb 15 19:07:00 2006
From: me at privacy.net (Dan Sommers)
Date: Wed, 15 Feb 2006 19:07:00 -0500
Subject: [OT] Separation of Functionality in C (was: Re: how to write a
	C-style for loop?)
References: <gZednVPdAtumI2_eRVn-jw@rcn.net>
	<xfDIf.178309$65.4923952@twister1.libero.it>
	<pan.2006.02.15.12.37.48.626409@REMOVETHIScyber.com.au>
	<Xns976B823952200duncanbooth@127.0.0.1>
Message-ID: <m2irrg88uz.fsf_-_@unique.fqdn>

On 15 Feb 2006 12:48:11 GMT,
Duncan Booth <duncan.booth at invalid.invalid> wrote:

> Putting the question the other way round: how would you move the
> control logic out of the loop in C?

I have written many functions not unlike this one (untested):

    void for_each_record( void (*callback)( RECORD * ), void *callback_data )
    {
        DATA *p;

        for( p = the_list; p; p = p->next )
            (*callback)( p->the_record, callback_data );
        return;
    }

where "the_list" comes from somewhere (probably static within the module
containing for_each_record, or the loop could access a database, or
whatever), and it is up to the callers to write their own callback
functions and manage their own callback_data.  Obviously, in an actual
product, there would be error checking, options for the callback
function to abort the loop early, and other bells and whistles (e.g.,
logging options) depending on the application.

But now we're off topic for comp.lang.python.

Regards,
Dan

-- 
Dan Sommers
<http://www.tombstonezero.net/dan/>


From claird at lairds.us  Wed Feb 22 15:08:02 2006
From: claird at lairds.us (Cameron Laird)
Date: Wed, 22 Feb 2006 20:08:02 GMT
Subject: HTTP & tcl
References: <1140055458.631283.202510@f14g2000cwb.googlegroups.com>
	<1140079405.290586.298270@g44g2000cwa.googlegroups.com>
	<c8shc3-7ms.ln1@lairds.us>
	<1140219732.545586.40890@g14g2000cwa.googlegroups.com>
Message-ID: <pqpuc3-oag.ln1@lairds.us>

In article <1140219732.545586.40890 at g14g2000cwa.googlegroups.com>,
alf <amnon.friling at citicorp.com> wrote:
			.
			.
			.
>I actually did post in comp.lang.tcl.  Please search for "wctp" -- the
>3 results are all mine.  Apparently, I am the only person interested in
>implementing it in Tcl.
			.
			.
			.
I assume that the follow-ups which appear in <URL:
http://groups.google.com/group/comp.lang.tcl/browse_thread/thread/989cee09a780da41/ >
and <URL:
http://groups.google.com/group/comp.lang.tcl/browse_thread/thread/e0b94335290d828/ >
suffice for you.


From skip at pobox.com  Thu Feb 23 21:39:53 2006
From: skip at pobox.com (skip at pobox.com)
Date: Thu, 23 Feb 2006 20:39:53 -0600
Subject: CSV module and UNICODE
In-Reply-To: <60987dac0602230253q3154866erff6b0a4f26b50378@mail.gmail.com>
References: <60987dac0602230253q3154866erff6b0a4f26b50378@mail.gmail.com>
Message-ID: <17406.29177.961198.341562@montanaro.dyndns.org>


    Rudy> I'm having problems writing unicode to a csv file.
    Rudy> I use the following code:
    ...

Have you tried the example UnicodeReader and UnicodeWriter classes in the
module documentation:

    http://www.python.org/dev/doc/devel/lib/node631.html

While the csv module is 8-bit clean it knows nothing about Unicode, so your
Unicode data has to be encoded before it hits the csv module code.  Your
code is expecting the Unicode to go through the csv module and be encoded to
utf-8 downstream in the by the eventual file object.

If there are people reading this who would like to tackle something for
Python 2.5, I am sure a patch that Unicodifies the csv module would be
welcome.

Skip


From johnjsal at NOSPAMgmail.com  Thu Feb 23 15:24:41 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 23 Feb 2006 20:24:41 GMT
Subject: a little more help with python server-side scripting
In-Reply-To: <59edncmGm6g2LmbeRVn-pw@rcn.net>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
Message-ID: <dSoLf.1663$No6.38996@news.tufts.edu>

John Salerno wrote:

> Unfortunately, I don't completely understand what it is I need to do 
> now. Where do I put the path they mentioned? And what do they mean by my 
> script path?

Ok, seems like the verdict is that the server doesn't have mod_python 
nor does it detect the .psp extension. It can, however, detect the .py 
extension. But does this mean I can simply include Python code in my 
HTML files, and then give my HTML files a .py extension? I don't know 
how to test this because I don't know how to write inline code yet. Is 
it something like:

<%@ include file=something %>

? They say:

"Please note that you may map .py to .html extension. However, if you 
set this mapping, .html will not work with the normal html tags anymore."

But I don't know what this means about 'mapping' the extension and what 
it means that html tags won't work anymore.


From hancock at anansispaceworks.com  Wed Feb  8 19:00:04 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Wed, 8 Feb 2006 18:00:04 -0600
Subject: apostrophe or double quote?
In-Reply-To: <17386.12524.935119.641171@montanaro.dyndns.org>
References: <1139370460.360400.232500@z14g2000cwz.googlegroups.com>
	<mailman.1589.1139373128.27775.python-list@python.org>
	<oIE*M4N+q@news.chiark.greenend.org.uk>
	<1139413150.237052.47320@o13g2000cwo.googlegroups.com>
	<17386.12524.935119.641171@montanaro.dyndns.org>
Message-ID: <20060208180004.54369169@samwise.anansi>

On Wed, 8 Feb 2006 11:57:00 -0600
skip at pobox.com wrote:
> Just to present a complete picture, not mentioned in this
> thread are triple-quoted strings:
> 
>     'abc' == '''abc''' == "abc" == """abc"""
> 
> Triple-quoted strings are no different than regular
> strings, though they do allow literal newlines to be
> embedded in the string.  Their presence is most often
> detected in doc strings precisely for this reason.

Also in the mode of beating a dead horse ... ;-)

Some people prefer to use single quotes for 'labels' (i.e. a
name which is meaningful to the program, but not to the
user), and reserve either double-quotes or
triple-double-quotes for text to be shown to the user. This
tends to make things slightly easier when you have to go
back and use gettext to internationalize your code.

But that's a matter of taste.

It is interesting to note, however, that the Python repr()
function prefers to use single quotes, using double quotes
only when a single quote is embedded in the string.

Cheers,
Terry


-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From mooquack at suad.org  Sat Feb  4 01:25:23 2006
From: mooquack at suad.org (Kirk McDonald)
Date: Fri, 03 Feb 2006 22:25:23 -0800
Subject: python's library support
In-Reply-To: <1139025112.098122.131330@z14g2000cwz.googlegroups.com>
References: <1139025112.098122.131330@z14g2000cwz.googlegroups.com>
Message-ID: <43e447da$1@nntp0.pdx.net>

Sean wrote:
> I am a newbie in python, and I have a feeling that python provides less
> library support than perl www.cpan.org  This seems a big discussion
> topic.
> 
> I want to know if there is extensive algorithm library support in
> python. I know there is a pretty neat module in perl to implement graph
> theory. Is there a graph theory module in python?
> 
> Thanks,
> 

Python's standard library is actually quite extensive; it's one of the 
language's greatest strengths:

http://www.python.org/doc/2.4.2/lib/lib.html

However, it is perhaps true that it is lacking in the raw algorithm 
department. On the subject of graphs, a quick Google search brings up 
this nice-looking library:

https://networkx.lanl.gov/

For computationally intensive array manipulation, there's always good 
ol' numarray:

http://www.stsci.edu/resources/software_hardware/numarray

The standard library can do quite a lot, and if it fails you, there's 
more than likely a third-party library available.

-Kirk McDonald


From jrivero at corvus.com.ve  Tue Feb 21 14:05:48 2006
From: jrivero at corvus.com.ve (Jesus Rivero (Neurogeek))
Date: Tue, 21 Feb 2006 15:05:48 -0400
Subject: algorithm, optimization, or other problem?
In-Reply-To: <1140541175.150430.315500@g44g2000cwa.googlegroups.com>
References: <43FB0661.1040202@bryant.edu>	<mailman.2237.1140534918.27775.python-list@python.org>
	<1140541175.150430.315500@g44g2000cwa.googlegroups.com>
Message-ID: <43FB648C.9030409@corvus.com.ve>

Hello,

If the parameters that are received by functions in order to calculate
weights, th's and dot's products , are equal to each other in different
cycles (and i bet more than often they will) i suggest you replace those
functions with memoizable functions. That also would ease work inside
the loop. Take into account other suggestions people have made and
review memoization in Python.


Regards.

Jesus (Neurogeek)







Bas wrote:

>Hi,
>
>as the others have already said, move all the invariants out of the
>loop. It is also not useful to randomly draw a vector out of random
>array. Some other small things:
>
>for i in range(len(x)): do something with x[i]
>should probably be replaced by
>for xi in x: do something with xi
>this saves an array index operation, don't know if this works for a
>numeric array
>
>You use the y**2 twice. A good compiler might notice this, but Python
>is interpreted...
>
>use += instead of + for w, the calculation can be done in place, this
>might save the creation of a new array/variable
>
>I am not sure what you are doing with x, bit it seems that you are
>transposing it a few times to many. Mightbe you can declare x as the
>transpose of what you do now, thereby saving the transpose in the loop?
>
>so my guess (not tested):
>
>x=random((1000,100))    # 1000 input vectors,  declared differently
>for xx in x:
>             y=dot(xx,w)
>             y2 = y*y
>             w+=ETA*(y*xx-y2*w);
>             th+= INV_TAU*(y2-th); 
>
>
>Hope it helps,
>Bas
>
>  
>



From martin at v.loewis.de  Wed Feb  8 13:57:36 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 08 Feb 2006 19:57:36 +0100
Subject: sys.path and unicode folder names
In-Reply-To: <43e99e5e@news.bezeqint.net>
References: <43e8c2ae$1@news.bezeqint.net>
	<43e8f3eb$0$7988$9b622d9e@news.freenet.de>
	<43e99e5e@news.bezeqint.net>
Message-ID: <43EA3F20.2020402@v.loewis.de>

Nir Aides wrote:
> I can not restrict the name to CP_ACP.
> I am interested in the general case of Unicode.

So you should implement a patch, and contribute this
to sf.net/projects/python.

Regards,
Martin


From ptmcg at austin.rr._bogus_.com  Mon Feb  6 17:27:36 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 06 Feb 2006 22:27:36 GMT
Subject: a question regarding call-by-reference
References: <1139250105.744691.110440@o13g2000cwo.googlegroups.com>
Message-ID: <s3QFf.28995$1%5.703@tornado.texas.rr.com>

"enjoying the view" <pparkkin at gmail.com> wrote in message
news:1139250105.744691.110440 at o13g2000cwo.googlegroups.com...
> I am working on a school project, trying to build a simple RPC stub
> generator. The idea is that the generator takes a normal python file
> with functions defined in it and produces a client and server stub. The
> client stub has the same functions defined, but they just connect to
> the server and ask it to call the desired functions. The server stub is
> a server listening for incoming requests and dispatching them to the
> appropriate functions and sending back the results.
<snip>

One thing you might try is iterating over the arguments and doing special
handling for lists and dicts, which can be updated within the called module.
Using your example (changing 'list' to 'listarg' to avoid confusion):

def add_elm(listarg):
   listarg.append('elm')
   return

Generate code like:

def add_elm(listarg):
   send_message({'funcname': 'add_elm', 'args': (listarg)})
   response = receive_message()
   listarg[:] = response.get('args')[0][:]
   return response.get('result')

If the listargs get long/complicated, you might be doing a lot of data
copying at the cost of performance (especially since this is a defensive
copy - you don't *know* that the list was updated in the server in the first
place - I guess you could test first with "if response.get('args')[0] !=
listarg:" or something).

For dicts, do:

  dictarg.update(response.get('args')[n])

This will be a little cheaper than just total replacement of the contents,
which is what the list [:] slice will do.

But this special-case handling only works for lists and dicts (don't know
how you would handle tuples or scalar variables), you quickly run into other
problems with passing objects.  I'm taking you at your word that you are
creating a *simple* RPC stub generator.  At this point, you can generate
stubs for methods that do not update their arguments, or for methods that
pass lists or dicts.  I've used CORBA in the past, and this is similar to
using a subset of the full parameter functionality, such as using only "in"
parameters (as opposed to "out" or "inout").  That is, instead of defining a
method that modifies its parameter value, have the new value returned by the
function.  Python actually helps you here, since it is so easy to pass back
a tuple of values from a function.

This kind of parameter marshalling/unmarshalling gets complicated quickly.
You are already very near the edge of non-intrusiveness on the client and
server sides - to get more features, you'll need to start adding some
aspects of parameter passing mechanisms (such as CORBA's in/out/inout
keywords), and object marshalling conventions (such as requiring objects
that are passed to implement compare() and update() or copy() methods).

-- Paul




From bdesth.quelquechose at free.quelquepart.fr  Sun Feb 12 13:47:54 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 12 Feb 2006 19:47:54 +0100
Subject: Newbie
In-Reply-To: <v3JHf.2731$lo3.2501@trnddc07>
References: <v3JHf.2731$lo3.2501@trnddc07>
Message-ID: <43ef6433$0$25387$636a55ce@news.free.fr>

LittlePython a ?crit :
> Is this a good place to post python questions from newbie's, or would you
> suggest another board?

Well, depends on how newbie you are, both to Python and to programming, 
but yes, this is at least a good place to start. You may find that most 
other newsgroups are probably not the best places to post 
python-specific questions anyway !-)

We usually don't eat newbies for lunch so, in the worst case, you might 
be redirected to the python-tutor mailing-list (for ubernewbies) or the 
Fine Manual (that you are of course actively reading right now, isn't it 
?) when appropriate.

> Thx

You're welcome.

Another question ?-)


From lycka at carmen.se  Tue Feb  7 18:01:46 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 08 Feb 2006 00:01:46 +0100
Subject: Python Class use
In-Reply-To: <DF7Gf.241940$B43.7664779@phobos.telenet-ops.be>
References: <1139344110.219073.244830@f14g2000cwb.googlegroups.com>
	<DF7Gf.241940$B43.7664779@phobos.telenet-ops.be>
Message-ID: <dsb8sq$sml$1@wake.carmen.se>

Roel Schroeven wrote:
> import MyModule
> 
> x = MyModule.MyClass()
> x.f()
> 
> Or you could directly import MyClass into the global namespace like this:
> 
> from MyModule import MyClass
> 
> x = MyClass()
> x.f()
> 
> But that's not recommended since it clutters the global namespace and 
> makes it more difficult to see which name comes from which module.

No, no, it's completely kosher to use "from module import Class".
It won't clutter the namespace any more than the above as long
as you just import one class, and there's no "magically" appearing
names in any namespace. You should avoid "from module import *" in
your programs though, but feel free to use it in the interpreter.

Just using "from MyModule import *" and then simply using "MyClass"
in the code is confusing for others who read your code, since it's
not appearent where MyClass came from. As your progam grows and you
use more modules, it will get worse. Imagine that you have three
modules and do:

from module1 import *
from module2 import *
from module3 import *

How on earth will someone reading that progam know where to find the
definition of a class or function then, and what will happen if you
happened to use the same class or function name in more than one
module? As software grows, it gets more and more important to prevent
such problems.

With either "from module1 import Class1, Class2" or "import module1"
follwed by "o = module1.Class1()" etc, it will always be clear from
the source code file where Class1 is used, where it's defined. The
"from ... import ..." style means that you need to find the import
statement to figure out where it's from, so the plain "import x"
might be preferable, but that's a judgement call you need to make
from case to case.

But more importantly, I think "S" should realize that while the
interpreter is nice as a calculator etc and for experiments, the
normal way to use Python is to put practically all your code in
files. It's common to write code so that it's both useful as a
module and a stand alone program. You achieve by looking at the
"magic" __name__ variable, which is set to "__main__" if a script
is used as direct input to python, and to the file name (sans .py)
if imported.

E.g. if you have a file "whoami.py" containing just "print __name__",
doing "python whoami.py" will print out "__main__", but doing an
"import whoami" from the interpreter would print out "whoami".

So, if you want some code to check how many files and/or directories
you have in your current directory, you could make a module like this:

filecount.py---------------

import os

def filecount():
     return len(os.listdir('.'))

if __name__=='__main__':
     print "There are", filecount(), "entries in the current directory"

---------------------------

Then, "python filecount.py" might display

There are 12 entries in the current directory

while an interactive session might give:

 >>> import filecount
 >>> print filecount.filecount()
12
 >>>


From steve at holdenweb.com  Tue Feb 14 10:27:26 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 14 Feb 2006 10:27:26 -0500
Subject: Cygwin IDLE has no menu bar
In-Reply-To: <un1r9w8bmx8h.lnl7f81kydg$.dlg@40tude.net>
References: <mailman.1878.1139890464.27775.python-list@python.org>
	<un1r9w8bmx8h.lnl7f81kydg$.dlg@40tude.net>
Message-ID: <dssssq$q7v$1@sea.gmane.org>

Thorsten Kampe wrote:
> * Steve Holden (2006-02-14 04:14 +0100)
> 
>>I just wondered whether anyone has seen this problem and fixed it. An
>>IDLE with no menu bar isn't much use ...
> 
> 
> It's not fixed but the workaround is "idle -n"

So it is! Thanks.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From jack at performancedrivers.com  Mon Feb 13 16:31:57 2006
From: jack at performancedrivers.com (Jack Diederich)
Date: Mon, 13 Feb 2006 16:31:57 -0500
Subject: how do you pronounce 'tuple'?
In-Reply-To: <Wj6If.1606$No6.38150@news.tufts.edu>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
	<mailman.1857.1139863723.27775.python-list@python.org>
	<Wj6If.1606$No6.38150@news.tufts.edu>
Message-ID: <20060213213157.GD6479@performancedrivers.com>

On Mon, Feb 13, 2006 at 08:52:06PM +0000, John Salerno wrote:
> Terry Hancock wrote:
> 
> > So what's a 1-element tuple, anyway? A "mople"?  "monople"?
> > It does seem like this lopsided pythonic creature (1,) ought
> > to have a name to reflect its ugly, newbie-unfriendly
> > nature.
> > 
> > Are we having fun yet? ;-)
> 
> I kind of like 'moople'.  :)

I cry unquel.


From tprimke at interia.pl  Sat Feb  4 10:07:02 2006
From: tprimke at interia.pl (TPJ)
Date: 4 Feb 2006 07:07:02 -0800
Subject: A problem with some OO code.
In-Reply-To: <44js7gF2jkjnU1@uni-berlin.de>
References: <1139055710.688193.81000@z14g2000cwz.googlegroups.com>
	<44js7gF2jkjnU1@uni-berlin.de>
Message-ID: <1139065622.524655.176790@g44g2000cwa.googlegroups.com>

Thank you VERY much!

These other errors are not so serious. I think I'll fix them soon. The
most important thing is that now I'm ready to work on that code again.
Life is beautiful again!

Damn, I knew it is some very stupid mistake. I must learn how to use
that pylint, instead of asking people on the web such a stupid
questions.

(The sad thing is that I'm the only one developer, who works on that
code. I think I had just stuck before I sent the first message in this
topic.)



From donn at u.washington.edu  Wed Feb 15 19:06:19 2006
From: donn at u.washington.edu (Donn Cave)
Date: Wed, 15 Feb 2006 16:06:19 -0800
Subject: is socket thread safe?
References: <1139912679.559724.131020@f14g2000cwb.googlegroups.com>
	<F5PIf.30441$F_3.27833@newssvr29.news.prodigy.net>
Message-ID: <donn-171E0C.16061915022006@gnus01.u.washington.edu>

In article <F5PIf.30441$F_3.27833 at newssvr29.news.prodigy.net>,
 Bryan Olson <fakeaddress at nowhere.org> wrote:

> Is it safe for one thread to receive from a socket while
> another sends over the socket? Yes, that much is safe and
> perfectly reasonable.

I hear it works on most common platforms these days,
anyway.  I have seen socket implementations where it
didn't, though - the read would end as if interrupted
by a signal.

   Donn Cave, donn at u.washington.edu


From donn at u.washington.edu  Tue Feb 21 12:57:49 2006
From: donn at u.washington.edu (Donn Cave)
Date: Tue, 21 Feb 2006 09:57:49 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com>
	<mailman.2160.1140440898.27775.python-list@python.org>
	<1140454473.335788@jetspin.drizzle.com>
	<pan.2006.02.20.21.59.12.636908@REMOVETHIScyber.com.au>
	<1140490302.639049@jetspin.drizzle.com>
	<mailman.2231.1140532613.27775.python-list@python.org>
Message-ID: <donn-98EB11.09574921022006@gnus01.u.washington.edu>

In article <mailman.2231.1140532613.27775.python-list at python.org>,
 "Chris Mellon" <arkanes at gmail.com> wrote:
...
> They won't say Java. Ask them why Python is interpreted and Java isn't
> and you'll have a hard time getting a decent technical answer, because
> Python isn't all that different from Java in that regard, especially
> pre-JIT versions of Java.

For me that would be partly because I don't know that
much about Java, honestly.  Just searching at random
for something about the subject, I cam across this -
http://www-128.ibm.com/developerworks/java/library/j-native.html?loc=j
- which seems like it might be of some interest here.

My impression from reading this is that Java actually
can be compiled to native code, though in 2002 this
was relatively new.

   Donn Cave, donn at u.washington.edu


From martin at v.loewis.de  Tue Feb  7 14:24:28 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 07 Feb 2006 20:24:28 +0100
Subject: sys.path and unicode folder names
In-Reply-To: <43e8c2ae$1@news.bezeqint.net>
References: <43e8c2ae$1@news.bezeqint.net>
Message-ID: <43e8f3eb$0$7988$9b622d9e@news.freenet.de>

Nir Aides wrote:
> Is there a solution or a work around for the sys.path problem with
> unicode folder names on Windows XP?
> 
> I need to be able to import modules from a folder with a non-ascii name.

If the name is restricted to the CP_ACP code page (i.e. more than ASCII,
less then full Unicode), using the "mbcs" encoding should work fine.

Regards,
Martin


From fredrik at pythonware.com  Tue Feb 28 08:29:55 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 28 Feb 2006 14:29:55 +0100
Subject: compiled program input
References: <1141131055.777748.153150@v46g2000cwv.googlegroups.com>
Message-ID: <du1j8j$a31$1@sea.gmane.org>

mehmetmutigozel at gmail.com wrote:

> i have a compiled program named m.exe. when i execute it asks me to
> enter a parameter like "me.dat". the coder didn't manage the argv for
> this program and i only have the executable.
>
> is there a vay to call this executeable from python and give parameters
> to it?
>
>>m.exe
>>input1 ? me.dat
>>....
>
> something like this

does

    echo me.dat | m.exe

work ?

</F> 





From lycka at carmen.se  Thu Feb 23 12:18:57 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 23 Feb 2006 18:18:57 +0100
Subject: a little more help with python server-side scripting
In-Reply-To: <tXlLf.1658$No6.38711@news.tufts.edu>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<Lc0Lf.1652$No6.38850@news.tufts.edu>
	<slrndvp4tc.9ng.sybrenUSE@schuimige.unrealtower.org>
	<WJlLf.1657$No6.38822@news.tufts.edu>
	<tXlLf.1658$No6.38711@news.tufts.edu>
Message-ID: <dtkqq1$8n9$1@wake.carmen.se>

John Salerno wrote:
> After a little more investigation, this seems to be just one 
> implementation of PSP. I need to just figure out how to get 'regular' 
> PSP working for me, or if it's even possible on a Windows 2003 server.

I don't think there is such a thing as "regular PSP".
If they've enabled Python as a windows scripting language,
you can use Python instead of VBScript or JScript in ASP.

Another option might be http://spyce.sourceforge.net/index.html


From g.brandl-nospam at gmx.net  Mon Feb 13 15:50:52 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Mon, 13 Feb 2006 21:50:52 +0100
Subject: Pythonic gui format?
In-Reply-To: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
Message-ID: <45c9pcF5vc6bU1@individual.net>

Gregory Petrosyan wrote:
> Buenos dias, amigos!
> I have to write  _simple_  gui library, for embedding into game. My
> first attempt was to use XML: isn't it cute to describe ui in such a
> way:
> 
> <window>
>     <title>Hello World!</title>
>     <image text="nice picture here" pos=... src=... />
>     <text opts=...>
>         (some text here)
>     </text>
>     <list>
>         <item>first element</item>
>         <item>second one...</item>
>     </list>
>     <button action=... text="Click Me!" />
> </window>

One could imagine to model this with Python, like this:

class FooDlg(Window):
    title = "Hello World!"
    size = (400, 300)

    class WelcomeImg(Image):
        filename = "..."
        pos = (0, 0)

    class Box(Frame):
        text = "My Controls"

        class NameLbl(Label):
            text = "Name:"

        class NameField(TextBox):
            length = 100
            pos = ...
            def onClick(self):
                 MessageBox(self.text)

        class TestList(ListBox):
            items = ['First', 'Second']

_Slight_ misuse of "class" though...

Georg


From szabolcs.berecz at gmail.com  Thu Feb 16 14:29:46 2006
From: szabolcs.berecz at gmail.com (szabi)
Date: 16 Feb 2006 11:29:46 -0800
Subject: pythonic way of 'b = list(a); b.append(4)"
In-Reply-To: <dt280f$o8q$1@online.de>
References: <1140105883.069632.262530@g43g2000cwa.googlegroups.com>
	<dt280f$o8q$1@online.de>
Message-ID: <1140118186.574549.105220@o13g2000cwo.googlegroups.com>

The question was perfectly answered by Heiko Wundram:
f(*(a+[4]))

I know python is not a lawnmower but a programming language. I can
solve a lot of problems, but I prefer short, clear and nice solutions
to long and/or too powerful ones. So, my problem with my solution (b =
list(a); b.append(4)) was the same as with the others' involving
functions.

Actually what I missed is the fact that the + operator works fine with
lists...
With '+' I can solve everything. Ok, _almost_ everything :)

Thanks for everybody!

Szabi



From rarelychecked at gmail.com  Wed Feb  1 12:01:50 2006
From: rarelychecked at gmail.com (Never Code Faster Than You Can See)
Date: Wed, 01 Feb 2006 17:01:50 +0000
Subject: urllib2 - My POST Request just isn't working right
In-Reply-To: <mailman.1318.1138811611.27775.python-list@python.org>
References: <312cfe2b0602010753uc363a85wb3f87cf2677993a2@mail.gmail.com>	<mailman.1317.1138810288.27775.python-list@python.org>	<1138810726.547315.82890@f14g2000cwb.googlegroups.com>
	<mailman.1318.1138811611.27775.python-list@python.org>
Message-ID: <XPidnakwb4EddH3eRVny2g@mailbox.co.uk>

Gregory Pi?ero wrote:
> Ok, I tried the changes you guys suggested but same error still:
> 1. Corrected spelling of referrer.

errr, the other chap said the INcorrect spelling is correct for http. 
sorry about that.

> Here is what they say my request should look like:
> -------------------------------------------------------------------------
> POST /GatewayDC HTTP/1.0
> Referer: YourCompanyNameGoesHere
> Host: SSLserver.fedex.com
> Accept: image/gif, image/jpeg, image/pjpeg, text/plain, text/html, */*
> Content-Type: image/gif Content-length: %d
> 
> Your FedEx Transaction
> -------------------------------------------------------------------------
> Note that Host here is ficticious.  My host should be correct.  And
> they have referrer mispelled here so who knows which to use!

one oddity: they say here "SSL"
ie, a secure connection.

do you have to type in a password for your a/c when you look this info 
up manually on the web?

if so, you probably need a secure connection in the api too.

e.g. (copied out of my blogger code):
conn= httplib.HTTPSConnection(host)
conn.set_debuglevel(1)
conn.request("POST",path,body,headers)
response=conn.getresponse()
print response.read()

WHERE:
headers = { "Content-type"  : "application/xml"
            ,"Authorization" : basicstring
            ,"Host"          : host
           }

WHERE:
username="YOURACCOUNT"
pwd="YOURPWD"
host="SSLserver.fedex.com"
path="ANYTHINGAPPROPRIATE"
pwdDigest= base64.encodestring(username+":"+pwd).strip()
basicstring = "Basic "+ pwdDigest

altho chances are you'll have to fiddle with basicstring


From xavier.morel at masklinn.net  Wed Feb  8 18:35:52 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Thu, 09 Feb 2006 00:35:52 +0100
Subject: Ternary Operator Now?
In-Reply-To: <1139439694.312028.145280@g43g2000cwa.googlegroups.com>
References: <1139439694.312028.145280@g43g2000cwa.googlegroups.com>
Message-ID: <dsdv16$mp$1@apollon.grec.isp.9tel.net>

Ben Wilson wrote:
> I read somewhere else that Python was getting a ternary operator (e.g.
> x = (true/false) ? y : z). I read the PEP about it and that the PEP had
> been approved this past Fall. Has this been released into the wild yet?
> 
> IIRC, the operator is like:
> 
> x = y if C : else z
> 
PEP 308 "Conditional Expressions" has been accepted for Python 2.5, I'm 
pretty sure implementation hasn't even started yet.


From lunchtimemama at gmail.com  Sun Feb 26 00:49:07 2006
From: lunchtimemama at gmail.com (Lunchtimemama)
Date: 25 Feb 2006 21:49:07 -0800
Subject: Looking a device up in the Running Object Table
Message-ID: <1140932947.095000.32910@p10g2000cwp.googlegroups.com>

I'm looking to disable Windows autoplay for a particular device.
There's a registry key
(HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\AutoplayHandlers\CancelAutoplay\CLSID)
that will turn off autoplay for listed devices, but one must provide
the device's CLSID as it appears in the ROT.

I use the wmi module (http://tgolden.sc.sabren.com/python/wmi.html) to
discover the device's GUID, but I don't know enough about COM to look
it up in the ROT. Is there a difference between the GUID and the CLSID
in the ROT, or am I just not using the registry correctly?

Thanks.



From mensanator at aol.com  Mon Feb  6 16:01:34 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 6 Feb 2006 13:01:34 -0800
Subject: in over my head ascii
In-Reply-To: <1139256817.218319.160370@f14g2000cwb.googlegroups.com>
References: <1139245216.350356.272170@z14g2000cwz.googlegroups.com>
	<sk4fu1ljvt7h7d6euj7nq06e1e0ml8p8u5@4ax.com>
	<1139251420.501345.91850@g44g2000cwa.googlegroups.com>
	<1139256817.218319.160370@f14g2000cwb.googlegroups.com>
Message-ID: <1139259694.603482.293660@g14g2000cwa.googlegroups.com>


nephish at xit.net wrote:
> ok, part of what i have to do is know how many bytes will be sent. in
> ascii is it one byte per character ?
> like "password" would be 8 bytes long?

Yes, but when someone says ASCII STX, they usually mean
the single byte control character. This is a non-printable character
that you can create with chr(2). And ETX would be chr(3) (as
mentioned by DLB, there is no such thing as ASCII ENX).



From n.estner at gmx.de  Fri Feb  3 06:51:03 2006
From: n.estner at gmx.de (n.estner at gmx.de)
Date: 3 Feb 2006 03:51:03 -0800
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<drvd56$nb3$1@wake.carmen.se>
Message-ID: <1138967463.440194.184710@g49g2000cwa.googlegroups.com>

> First of all, you are using a really poor example of a "method",
> since it doesn't use any attributes of the Foo instance.

Agreed. I tried to post a short example, and it obviously was to short
to make my point clear. lets take a longer one. Current syntax:

class Pair:
    def __init__(self, a,b):
        self.a = a
        self.b = b

    def sum(self):
        return self.a + self.b

    def product (this):
        return this.a + this.b

My alternative syntax suggestion would be this one:

class Pair:
    def self.__init__(a,b):
        self.a = a
        self.b = b

    def self.sum():
        return self.a + self.b

    def this.product ():
        return this.a + this.b

> You are really giving "self" a magic meaning with your suggestion
> which isn't needed at all.

No. I hope this is clearer in the example above. "self" shouldn't be a
keyword. It's a special kind of argument now, so why shouldn't we
explicitly _declare_ that it's a special kind of argument? (as explicit
is better than implicit)

> So far, the existence of x.y somewhere
> in Python always implied that x was already introduced explicitly
> in the program,

Yes, but y(x) also implies that x and y have been introduced explicitly
before, unless it's in a "def" statement. The def statement always
introduces new variables.

> and you suggest that we violate that both in the
> "def self.x"-row, and inside the methods when we access attributes.

  def x(self):
declares two new identifiers, "x" and "self"

Why shouldn't
  def self.x():
declare two new identifiers ("x" and "self"), too?

Attribute acces wouldn't change.



From kevin at janrain.com  Tue Feb 14 18:41:55 2006
From: kevin at janrain.com (Kevin Turner)
Date: Tue, 14 Feb 2006 15:41:55 -0800
Subject: [ANN] python-openid 1.0.4
Message-ID: <1139960515.4762.51.camel@lobster.janrain.com>

This morning there was a message in my inbox from my DNS registrar
inviting me to click through for a "special message" from them.  An
animation loaded with elaborately rendered red roses and candlelight,
and wishes for a happy valentines day written out in a flowing font.

Well, I guess we could have done that too.  But we don't really know
that much about this Saint Valentine character.  Do we really need to
send out cards stamped with symbolic hearts?  Or would it in fact be
better to publish some bug fixes?  For all I know, Saint Valentine's day
job is working as a sysadmin.  Perhaps he even runs an OpenID server for
his company's domain.

So today we're releasing version 1.0.4 of our Python OpenID library.
This is a maintenance release which includes

in openid.consumer:
 * added logging to more error cases.
 * fixed to appropriately return SETUP_NEEDED from completeAuth().
 * fixed some occurrences of unnecessarily falling back to dumb mode.

in openid.server:
 * corrections to the server's replay attack prevention in dumb mode.
 * made more careful checking of trust_root.

and in openid.store, used by both parties:
 * removal of several arbitrary field limits in the SQL stores.  (This
will effect newly created stores only; old ones will continue operating
with their existing schema.)

Python OpenID is available under the GNU LGPL from
http://www.openidenabled.com/openid/libraries/python

Download links:

http://www.openidenabled.com/resources/downloads/python-openid/python-openid-1.0.4.tar.gz
http://www.openidenabled.com/resources/downloads/python-openid/python-openid-1.0.4.zip

sha1sums: 
1d7548ece4a92d70fe5f8b8abbfbafd30ea57c4b  python-openid-1.0.4.tar.gz
423fde12c5030553798381ffa7f8ecda340533da  python-openid-1.0.4.zip

Share and Enjoy,

  - Kevin
    JanRain, Inc.




From DustanGroups at gmail.com  Sun Feb  5 14:12:01 2006
From: DustanGroups at gmail.com (Dustan)
Date: 5 Feb 2006 11:12:01 -0800
Subject: Get System Date?
In-Reply-To: <1139163725.058296.232200@z14g2000cwz.googlegroups.com>
References: <1139161771.537069.181010@g44g2000cwa.googlegroups.com>
	<1139163725.058296.232200@z14g2000cwz.googlegroups.com>
Message-ID: <1139166721.423946.112000@g14g2000cwa.googlegroups.com>

Thanks



From bonono at gmail.com  Tue Feb  7 20:48:46 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 7 Feb 2006 17:48:46 -0800
Subject: Question about idioms for clearing a list
In-Reply-To: <mailman.1577.1139361925.27775.python-list@python.org>
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>
	<E78Gf.22893$Jd.14515@newssvr25.news.prodigy.net>
	<mailman.1567.1139348019.27775.python-list@python.org>
	<1139355876.391746.45580@g44g2000cwa.googlegroups.com>
	<mailman.1577.1139361925.27775.python-list@python.org>
Message-ID: <1139363326.618269.210740@z14g2000cwz.googlegroups.com>


Tim Hochberg wrote:
> bonono at gmail.com wrote:
> > Fredrik Lundh wrote:
> >
> >>>Python now has, what, three built-in mutable collections types:
> >>>lists, dictionaries, and sets. Dicts and sets both have a clear()
> >>>method and lists do not.
> >>
> >>dicts and sets are mappings, and lists are not.  mappings don't
> >>support slicing.  lists do.
> >
> >
> > I am confused. Could you explain this ? I was under the impression said
> > above(mapping don't support slicing), until after I read the language
> > reference. I don't think it is slicing as in the list slicing sense but
> > it does use the term "extend slicing".
> >
> > http://www.python.org/doc/2.4.2/ref/slicings.html
> >
> > "The semantics for an extended slicing are as follows. The primary must
> > evaluate to a mapping object, and it is indexed with a key that is
> > constructed from the slice list, as follows. If the slice list contains
> > at least one comma, the key is a tuple containing the conversion of the
> > slice items; otherwise, the conversion of the lone slice item is the
> > key. The conversion of a slice item that is an expression is that
> > expression. The conversion of an ellipsis slice item is the built-in
> > Ellipsis object. The conversion of a proper slice is a slice object
> > (see section 3.2) whose start, stop and step attributes are the values
> > of the expressions given as lower bound, upper bound and stride,
> > respectively, substituting None for missing expressions."
>
>
> This is in place to support multidimensional arrays, such as in numpy.
> If, for instance, you have a 9x9 array A, then A[3:6,3:6] will extract a
> 3x3 block from the center of it. A[3:6,3:6] is equivalent to
> A[(slice(3,6,None), slice(3,6,None))] and the resulting tuple gets
> passed through the mapping interface, but it is not a mapping in any
> real sense.
>
> I don't think there's anything in core Python that uses this and it's
> not really relevant to this thread.
>
Thanks. I would say that it is not relevant to the OP's question but
the thread has turned to "anyone who read the doc should know about
slicing" and that prompted me to go and read the doc(I don't have the
OP's mentioned need in my coding so far and never read about the full
pontential of slicing, just use it as the right hand side intuitively)
about slicing and found the documentation to be a bit lacking(only a
brief mentioning of slicing in the turtorial and this confusing
section).

Beside, just from reading this page, it seems that a[start:stop:stride]
is not a valid construction for sequence object 'a'.

To me, reading the doc makes me more confuse about what is slicing.



From exarkun at divmod.com  Wed Feb  8 20:04:22 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 8 Feb 2006 20:04:22 -0500
Subject: Replacing curses (Was: Re: Problem with curses and UTF-8)
In-Reply-To: <43EA5032.3080307@excess.org>
Message-ID: <20060209010422.2697.1152385008.divmod.quotient.12947@ohm>

On Wed, 08 Feb 2006 15:10:26 -0500, Ian Ward <ian at excess.org> wrote:
>Grant Edwards wrote:
>> Depending on what you're tring to do, slang might be an option,
>
>I've looked at newt and snack, but all I really need is:
>- a way to position the cursor at (0,0)
>- a way to hide and show the cursor
>- a way to detect when the terminal is resized
>- a way to query the terminal size

You might be interested in Twisted Conch's insults package.  I haven't followed this thread closely, so I'm not sure if it covers all your requirements, but it can do all of the above.

Jean-Paul


From larry.bates at websafe.com  Thu Feb 16 09:31:30 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Thu, 16 Feb 2006 08:31:30 -0600
Subject: Encryption
In-Reply-To: <1140048043.749776.198460@g43g2000cwa.googlegroups.com>
References: <1140048043.749776.198460@g43g2000cwa.googlegroups.com>
Message-ID: <43F48CC2.1010607@websafe.com>

dirvine wrote:
> HI hope you can help (know you can).
> 
> I am looking for a very strong AIS or better symetrical encryption in
> python. Any suggestions ideas welcome. I have spent a lot of time
> looking everywhere at pycrypto and many others but is a wee bit of a
> minefield out there. Anyone have any experience of a true encryption
> (not xor or anything weak). I am looking for something strong enough to
> encrypt your credit card info and publish file on website (no not
> actually do that but have encryption strong enough if you did).
> 
> Many thanks and if I have missed obvious docs please take it easy on me
> - I am new here :-)
> 
Take a look here.  This package works perfectly for us.

http://www.amk.ca/python/code/crypto

-Larry


From and-google at doxdesk.com  Sat Feb 25 09:43:58 2006
From: and-google at doxdesk.com (and-google at doxdesk.com)
Date: 25 Feb 2006 06:43:58 -0800
Subject: Pure python implementation of string-like class
In-Reply-To: <mailman.2417.1140830817.27775.python-list@python.org>
References: <mailman.2417.1140830817.27775.python-list@python.org>
Message-ID: <1140878638.666329.316900@u72g2000cwu.googlegroups.com>

Akihiro KAYAMA wrote:
> As the character set is wider than UTF-16(U+10FFFF), I can't use
> Python's native unicode string class.

Have you tried using Python compiled in Wide Unicode mode
(--enable-unicode=ucs4)? You get native UTF-32/UCS-4 strings then,
which should be enough for most purposes.

-- 
And Clover
mailto:and at doxdesk.com
http://www.doxdesk.com/



From donn at u.washington.edu  Thu Feb  2 20:32:58 2006
From: donn at u.washington.edu (Donn Cave)
Date: Thu, 02 Feb 2006 17:32:58 -0800
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<donn-C3B8DF.14535302022006@gnus01.u.washington.edu>
	<1138926741.052843.169270@z14g2000cwz.googlegroups.com>
Message-ID: <donn-AC8404.17325802022006@gnus01.u.washington.edu>

In article <1138926741.052843.169270 at z14g2000cwz.googlegroups.com>,
 n.estner at gmx.de wrote:
> >    write(sys.stdin, split(read(open(file, 'r')))[0])
> 
> So, if I got you right, the interpreter would have to interpret this
> line like this:
> 1. Evaluate the first parameter of the first function (sys.stdin)
> 2. Look up the attribute "write" in this object
> 3. evaluate the first parameter of the split function ->
> 4. evaluate the first parameter of the read function ->
> 5. evaluate file (I guess this is a local string variable?)
> 6. try attribute lookup "open" on the string
> 7. fail -> call the global "open" function
> 8. lookup "read" in that object, call it
> 9. attribute lookup "split" on the returned object
> 10. call __getitem__(0)
> 11. pass the parameters to the write function from (1)
> 
> Is this correct?
> My main problems are that you have to "guess" at step 6/7, and that the
> order of evaluation makes me a little dizzy ;-) Also, member functions
> seem to "shadow" global ones, what if I wanted to use some global
> "split" function I've written myself instead of the string's one. If I
> was mean, I'd ask you what this one does:
>   class A:
>     def test(self, this): return 1
>   class B:
>     def test(this, self): return 2
>   test(self=A(), this=B())

That usage (self is second parameter to B.test) is bound
to cause trouble in general, but in this case doesn't have
any effect I can see.  The function call "test" would be
resolved from its first parameter, instance of A, and that
function would return 1.  One of us is missing something
here, could be me.

> 
> The current call syntax at least can be read from left-to-right, and
> you always know whether you call a member function or a global one.

That's exactly the problem, it doesn't read from left to right,
because we swap back and forth between function(parameter and
parameter.function notation.  It only works if you don't have
to mix the two.  I'm saying, pick one and use it consistently.

   Donn Cave, donn at u.washington.edu


From fabianosidler at gmail.com  Tue Feb  7 15:38:28 2006
From: fabianosidler at gmail.com (Fabiano Sidler)
Date: Tue, 7 Feb 2006 21:38:28 +0100
Subject: Python Class use
In-Reply-To: <1139344110.219073.244830@f14g2000cwb.googlegroups.com>
References: <1139344110.219073.244830@f14g2000cwb.googlegroups.com>
Message-ID: <d3d66b1c0602071238s59352f6et@mail.gmail.com>

Huh? You definitely must import that module. Then, is your homedir
listed in sys.path?

Greetings,
F. Sidler


From bearophileHUGS at lycos.com  Thu Feb 16 20:18:51 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 16 Feb 2006 17:18:51 -0800
Subject: define loop statement?
References: <lW4Jf.31559$3V4.8390@trnddc06>
Message-ID: <1140139131.720054.235480@g43g2000cwa.googlegroups.com>

David Isaac:
> I would like to be able to define a loop statement
> (nevermind why) so that I can write something like
>
> loop 10:
>     do_something
>
> instead of
>
> for i in range(10):
>     do_something
>
> Possible?  If so, how?

It seems that you are looking for macros; maybe Logix "language"
(www.livelogix.net/logix) or Boo (boo.codehaus.org) can solve your
problem.
Otherwise you can do it with very different languages like Lisp or
Scheme (with a different syntax) and maybe Dylan too.

If you tell us your purpose, maybe we can suggest you a
better/different solution.

Bye,
bearophile



From benji at benjiyork.com  Thu Feb 23 19:37:16 2006
From: benji at benjiyork.com (Benji York)
Date: Thu, 23 Feb 2006 19:37:16 -0500
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <dtlba8$asj$1@sea.gmane.org>
References: <dtl9ad$35h$1@sea.gmane.org> <43FE2A14.5070609@benjiyork.com>
	<dtlba8$asj$1@sea.gmane.org>
Message-ID: <43FE553C.6010403@benjiyork.com>

Paul Probert wrote:

[snip my slightly-snotty quoting of the sleep.time docs]

>    Thanks, but yes, I had read that before posting. One would think, 
> though, that the extra 200 seconds is a bit extreme to be blamable on 
> system scheduling granularity.

I didn't intend to invoke scheduling granularity, I was implying that 
under high system load it may take much longer for the sleep to "come back".

>    I'm starting to think we've got a worm of some kind. If so, its 
> invisible to our Norton AV corporate.

If you don't see any appreciable load on the machines (I read that 
you're seeing the same thing on several diverse machines elsewhere in 
this thread), then yes, I'd agree that /something/ strange is going on.

Unfortunately this sounds like one of those things that will require 
"laying on of hands" to diagnose.  Good luck!  Let us know how it turns 
out, I'm curious. :)
--
Benji York


From scott.daniels at acm.org  Sat Feb  4 14:19:58 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sat, 04 Feb 2006 11:19:58 -0800
Subject: Recursive function going infinite and I can't see why.
In-Reply-To: <mailman.1421.1139074911.27775.python-list@python.org>
References: <mailman.1409.1139037509.27775.python-list@python.org>	<pan.2006.02.04.11.23.00.710814@REMOVETHIScyber.com.au>
	<mailman.1421.1139074911.27775.python-list@python.org>
Message-ID: <43e4fd44$1@nntp0.pdx.net>

Gregory Pi?ero wrote:
> ....  I want to walk down each tree and get a random subtree at a random depth.

Can you quantify that randomness?  Should it be uniform at each level?
Thinking about this may be fruitful.  I don't yet know whether you need
to see all leaves before you know which subtree to choose.

Because I am a clueless American, so I don't know if Pi?ero is a common
name or not.  Are you perhaps related to the playwright?

--Scott David Daniels
scott.daniels at acm.org


From simonwittber at gmail.com  Fri Feb  3 05:35:18 2006
From: simonwittber at gmail.com (simonwittber at gmail.com)
Date: 3 Feb 2006 02:35:18 -0800
Subject: would it be feasable to write python DJing software
In-Reply-To: <druc1r$cre$1@bagan.srce.hr>
References: <1138925819.465108.181760@o13g2000cwo.googlegroups.com>
	<druc1r$cre$1@bagan.srce.hr>
Message-ID: <1138962918.427815.70300@g14g2000cwa.googlegroups.com>

Levi Campbell wrote:
> Any and all mixing would probably happen in some sort of multimedia
> library written in C (it would be both clumsy to program and slow to
> execute if the calculations of raw samples/bytes were done in python) so
> there shouldn't be a noticable performance hit.

Actually, manipulating and mixing audio samples can be both fast and
elegant, in Python, if you use Numeric or a similar library.

-Sw.



From martin.witte at gmail.com  Wed Feb  8 16:16:09 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 8 Feb 2006 13:16:09 -0800
Subject: Number Format function
In-Reply-To: <mailman.1623.1139430803.27775.python-list@python.org>
References: <mailman.1603.1139418641.27775.python-list@python.org>
	<1139430545.465074.322060@z14g2000cwz.googlegroups.com>
	<mailman.1623.1139430803.27775.python-list@python.org>
Message-ID: <1139433369.390308.170070@f14g2000cwb.googlegroups.com>

This is a little faster:

def number_format(num, places=0):
    """Format a number according to locality and given places"""
    locale.setlocale(locale.LC_ALL, "")
    return locale.format("%.*f", (places, num), True)

I tested this ok with my test



From robert.kern at gmail.com  Fri Feb 17 14:32:12 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 17 Feb 2006 13:32:12 -0600
Subject: ANN: Release of NumPy 0.9.5
In-Reply-To: <1140203632.748504.138390@g47g2000cwa.googlegroups.com>
References: <mailman.2028.1140135591.27775.python-list@python.org>	<45ljqdF7706gU1@individual.net>	<mailman.2044.1140171572.27775.python-list@python.org>
	<1140203632.748504.138390@g47g2000cwa.googlegroups.com>
Message-ID: <dt58bs$2re$1@sea.gmane.org>

vinjvinj wrote:
> I use Numeric extensivly and have been thinking of migrating to Numpy.
> I have a couple of questions:
> 
> 1. Will the speed of creating new arrays, copying new arrays and
> slicing new arrays be similar  to Numeric?

Various benchmark comparisons with Numeric and numarray have been done. Check
the archives of the numpy-discussion and scipy-dev lists. Of course, if you're
interested in performance on your problems, you need to time code that's
appropriate to your uses. Since numpy installs alongside Numeric, you should be
able to do this relatively easily.

> 2. I have some pyrex code that uses Numeric header files. will they be
> compatible with numpy?

Yes. Just change the header file from "Numeric/arrayobject.h" to
"numpy/arrayobject.h".

> 3. I use they following tow functions from scipy.core: extract, insert.
> Are there similar functions in Numpy?

Most, if not all, of the functions in scipy_base have been moved into numpy.

In [1]: import numpy

In [2]: numpy.extract?
Type:           function
Base Class:     <type 'function'>
String Form:    <function extract at 0x6e2870>
Namespace:      Interactive
File:
/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/numpy-0.9.5.2085-py2.4-macosx-10.4-ppc.egg/numpy/lib/function_base.py
Definition:     numpy.extract(condition, arr)
Docstring:
    Return the elements of ravel(arr) where ravel(condition) is True
    (in 1D).

    Equivalent to compress(ravel(condition), ravel(arr)).


In [3]: numpy.insert?
Type:           function
Base Class:     <type 'function'>
String Form:    <function insert at 0x6e28b0>
Namespace:      Interactive
File:
/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/numpy-0.9.5.2085-py2.4-macosx-10.4-ppc.egg/numpy/lib/function_base.py
Definition:     numpy.insert(arr, mask, vals)
Docstring:
    Similar to putmask arr[mask] = vals but the 1D array vals has the
    same number of elements as the non-zero values of mask. Inverse of
    extract.

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From fredrik at pythonware.com  Tue Feb 14 03:11:14 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 14 Feb 2006 09:11:14 +0100
Subject: Splitting a string
References: <mailman.1883.1139903399.27775.python-list@python.org>
	<1139904222.678581.324720@z14g2000cwz.googlegroups.com>
Message-ID: <dss3b3$qq5$1@sea.gmane.org>

Dylan Moreland wrote:

> So I would try something like:
>
> pat = re.compile(r" (?:AND|OR|AND NOT) ")
> pat.split(string)

footnote: this yields:

    ['Smith, R.', 'White', 'Blue, T.', 'Black', 'Red', 'NOT Green']

(the | operator picks the first (leftmost) alternative that results in an
overall match.)

</F>





From steve at holdenweb.com  Sun Feb  5 23:50:43 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 06 Feb 2006 04:50:43 +0000
Subject: psycopg2 rounds unix time
In-Reply-To: <44np6pF3445fU1@individual.net>
References: <44np6pF3445fU1@individual.net>
Message-ID: <ds6kj1$5n7$1@sea.gmane.org>

Luis P. Mendes wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Hi,
> 
> I've inserted a couple hundred rows in a table in Postgres via psycopg2.
> 
> The first field of each row is a certain unix time (since epoch) when an
> event occured.
> When I try to access that database with psycopg2, I get rounded values
> for the unix time field.
> 
> example:
> unix time inserted at first row: 1138839839.64456
> unix time as retrieved in psql: 1.13884e+09
> unix time retrieved by psycopg2: 1138840000.0
> 
> Is this a bug?
> 
> I'm using:
> Python 2.3.5
> in a Debian Sarge box
> PostgreSQL 7.4.7
> psycopg2-2.0b6
> 
It could be your PostgreSQL. I'm running 8.0 on my Windows box and I 
can't get to the 7.3 on my Linux box. The 8.0 docs say the following 
about timestamps (which I presume you are using):

"""
Note: When timestamp values are stored as double precision 
floating-point numbers (currently the default), the effective limit of 
precision may be less than 6. timestamp values are stored as seconds 
before or after midnight 2000-01-01. Microsecond precision is achieved 
for dates within a few years of 2000-01-01, but the precision degrades 
for dates further away. When timestamp values are stored as eight-byte 
integers (a compile-time option), microsecond precision is available 
over the full range of values. However eight-byte integer timestamps 
have a more limited range of dates than shown above: from 4713 BC up to 
294276 AD. The same compile-time option also determines whether time and 
interval values are stored as floating-point or eight-byte integers. In 
the floating-point case, large interval values degrade in precision as 
the size of the interval increases.
"""

Otherwise, what data type *are* you using to store the Unix time?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From localpricemaps at gmail.com  Wed Feb  1 14:08:27 2006
From: localpricemaps at gmail.com (localpricemaps at gmail.com)
Date: 1 Feb 2006 11:08:27 -0800
Subject: indentation messing up my tuple?
In-Reply-To: <1138727155.471107.206720@o13g2000cwo.googlegroups.com>
References: <1138409154.334017.176760@g49g2000cwa.googlegroups.com>
	<pan.2006.01.28.01.27.40.386948@REMOVETHIScyber.com.au>
	<1138414427.035181.284740@z14g2000cwz.googlegroups.com>
	<1138477255.714961.281940@f14g2000cwb.googlegroups.com>
	<1138727155.471107.206720@o13g2000cwo.googlegroups.com>
Message-ID: <1138820907.033454.309290@g14g2000cwa.googlegroups.com>

i am using a tuple because i am building lists.  if i just use (food +
drink) then while drink is unique food remains the same do i get this:

(burger, coke)
(burger, 7up)
(burger, sprite)

infidel wrote:
> tuple is the name of the built-in type, so it's not a very good idea to
> reassign it to something else.
>
> (food + drink + '\n') is not a tuple, (food + drink + '\n',) is
>
> There's no reason to use tuples here, just do this:
> 
> data.append(food + drink)
> f.write('\n'.join(data))



From luismgz at gmail.com  Sun Feb  5 11:37:06 2006
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 5 Feb 2006 08:37:06 -0800
Subject: Learning Python
In-Reply-To: <1139156577.897100.69140@g43g2000cwa.googlegroups.com>
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
	<ds588v$6s4$02$1@news.t-online.com>
	<1139156577.897100.69140@g43g2000cwa.googlegroups.com>
Message-ID: <1139157426.107621.206870@o13g2000cwo.googlegroups.com>

Use "input" to enter numbers, and "raw_input" to enter strings.
For example:

x = input('Enter your age: ')
y = raw_input('Enter your name: ')



From python at rcn.com  Tue Feb  7 23:07:57 2006
From: python at rcn.com (Raymond Hettinger)
Date: 7 Feb 2006 20:07:57 -0800
Subject: Question about idioms for clearing a list
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au>
	<ds83kd$98m$1@sea.gmane.org>
	<mailman.1510.1139250471.27775.python-list@python.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<E78Gf.22893$Jd.14515@newssvr25.news.prodigy.net>
	<dsb3lq$shu$1@sea.gmane.org>
	<mailman.1568.1139350103.27775.python-list@python.org>
Message-ID: <1139371677.501983.281080@z14g2000cwz.googlegroups.com>

[Ed Singleton]
> Is it obvious to a newbie what the difference between mappings and
> "not-mappings", and is it obvious exactly what is and isn't a mapping?

FWIW, there is a glossary in the tutorial:

   http://docs.python.org/tut/node18.html



From lycka at carmen.se  Thu Feb 23 11:29:38 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 23 Feb 2006 17:29:38 +0100
Subject: May i customize basic operator (such as 1==3)?
In-Reply-To: <j2qpv112csno0a243t48aaebcnrnmfb4e1@4ax.com>
References: <mailman.2279.1140579610.27775.python-list@python.org>
	<l7onv1t5rpivgrutuhqpahu56ah113b7su@4ax.com>
	<mailman.2281.1140582215.27775.python-list@python.org>
	<j2qpv112csno0a243t48aaebcnrnmfb4e1@4ax.com>
Message-ID: <dtkntj$25o$1@wake.carmen.se>

Casey Hawthorne wrote:
> I have heard, that one should always use objects when programming and
> avoid the builtin types!

Who told you that? Some university teacher with no industrial
experience? ;^)

It's not good advice in Python programming, for two reasons.
- It can influence performance significantly, since Python
   is so dynamic. You could change the behaviour of a class,
   or change the class of an instance in runtime. This means
   that the Python runtime system needs to look up a lot of
   things repeatedly for class instances. For ints and floats
   etc, it doesn't need to do that.
- In general, Python doesn't rely on types so much for enforcing
   things. The good way to ensure correct Python code is with
   automated tests, and it's considered good practice to design
   your APIs so that they require as little as possible from
   the parameters passed in. Stricter typing means tighter
   coulpling, and thus a bigger maintenance burden.

For e.g. C++, I think it could often be a good idea to use more
specialzed classes, particularly if you want the compiler to help
you with type checking. I've rarely seen it used in practice
though. The problem with using the compiler to verify that
the code is correct is that while it can check types (and do
it better if they are more specific) it still can't verify
that the code actually does what you want it to do, just that
it does *something* which is legal C++. So, in the end you
still need automated tests to verify the program in a systematic
way, and these tests will find those type errors even if you
don't write a lot of specialized classes. I mean, if you have
a full set of tests, and all tests run OK, your program is
correct, whatever types you used in various places. It might
not be ideal, but it's correct. Your classes will mainly be a
rigid way of documenting your API.


From crutcher at gmail.com  Mon Feb 27 13:37:17 2006
From: crutcher at gmail.com (Crutcher)
Date: 27 Feb 2006 10:37:17 -0800
Subject: different ways to strip strings
In-Reply-To: <dtvgd4$ci7$1@solaris.cc.vt.edu>
References: <dtvgd4$ci7$1@solaris.cc.vt.edu>
Message-ID: <1141065437.783397.204530@u72g2000cwu.googlegroups.com>

It is something of a navel (left over feature). "xyz".strip() is (I
think) newer than string.strip()



From peter at engcorp.com  Tue Feb  7 22:03:18 2006
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 07 Feb 2006 22:03:18 -0500
Subject: Hi reliability files, writing,reading and maintaining
In-Reply-To: <Y15Gf.280109$D47.254492@fe3.news.blueyonder.co.uk>
References: <Y15Gf.280109$D47.254492@fe3.news.blueyonder.co.uk>
Message-ID: <dsbn19$q2o$1@sea.gmane.org>

John Pote wrote:
> I would wish to secure this data gathering against crashes of the OS, 
> hardware failures and power outages.

My first thought when reading this is "SQLite" (with the Python wrappers 
PySqlite or APSW).

See http://www.sqlite.org where it claims "Transactions are atomic, 
consistent, isolated, and durable (ACID) even after system crashes and 
power failures",

... or some of the sections in http://www.sqlite.org/lockingv3.html 
which provide more technical background.

If intending to rely on this for a mission critical system, one would be 
well advised to research independent analyses of the claims.

-Peter



From davidb at mcs.st-and.ac.uk  Fri Feb 24 12:55:59 2006
From: davidb at mcs.st-and.ac.uk (David Boddie)
Date: 24 Feb 2006 09:55:59 -0800
Subject: KPanelApplet using Python
In-Reply-To: <mailman.2391.1140782029.27775.python-list@python.org>
References: <mailman.2391.1140782029.27775.python-list@python.org>
Message-ID: <1140803759.213567.229980@e56g2000cwe.googlegroups.com>

Varun Hiremath wrote:

> I was wondering if there is any way to make KDE PanelApplets
> using Python. I have made a small window using Qt, kdeui nad
> kdecore libs. Now I want to add it to the KDE kicker. Can I
> get any help regarding this matter.

The other responses in this thread have covered solutions that use
the system tray, and you may want to try something like that with
the KSystemTray class in kdeui. It's available in PyKDE, so you
shouldn't have any trouble adding new items to kicker that way.

However, you asked specifically about Panel Applets. Unfortunately,
they are a lot more difficult to implement in Python because you
need to write a library in C++ to load them. Some of us in the
PyQt/PyKDE community did some work towards that, and had working
applets but, as far as I know, they don't work with recent releases.

You might get some additional help or advice about this if you try
mailing the PyKDE list:

http://mats.imk.fraunhofer.de/mailman/listinfo/pykde

Good luck!

David



From silverburgh.meryl at gmail.com  Sun Feb 26 15:28:07 2006
From: silverburgh.meryl at gmail.com (silverburgh.meryl at gmail.com)
Date: 26 Feb 2006 12:28:07 -0800
Subject: How can I find the remainder when dividing 2 integers
In-Reply-To: <46egiuFanujjU2@uni-berlin.de>
References: <1140984473.723258.70050@e56g2000cwe.googlegroups.com>
	<46egiuFanujjU2@uni-berlin.de>
Message-ID: <1140985687.324979.153730@e56g2000cwe.googlegroups.com>

okay, I try you suggestion, and re-write my code like this:
colors = ["#ff0000", "#00FF00", "#0000FF"]
colorIndex = 0

def getText(nodelist):


             for str in strings:

                     print colors[colorIndex  % colors.length]
                     colorIndex += 1

but i get this error:
   print colors[colorIndex  % colors.length]
UnboundLocalError: local variable 'colorIndex' referenced before
assignment



From noaddress at ohno.email.com  Sat Feb 25 13:09:52 2006
From: noaddress at ohno.email.com (Twig)
Date: Sat, 25 Feb 2006 19:09:52 +0100
Subject: Is Python a Zen language?
In-Reply-To: <44007c0f$1_2@newspeer2.tds.net>
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
	<44007c0f$1_2@newspeer2.tds.net>
Message-ID: <dtq2qd$9uf$1@phys-news4.kolumbus.fi>

Kent Johnson wrote:
> 
> Expanding on what Alex said :-)
*snip*
> 
> Python is an excellent tool language, it is very pragmatic and powerful 
*snip*
> 
> Kent

"It's a good axe", Muddy waters said about his guitar when asked by some 
heavy-mega guitar hero.

Python is practical tool for practical problems. But if problem isn't 
practical, it is misdefined.


From jzgoda at o2.usun.pl  Tue Feb 28 14:59:58 2006
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Tue, 28 Feb 2006 20:59:58 +0100
Subject: Threading - will threads run in parallel?
In-Reply-To: <1141155627.666491.200290@i40g2000cwc.googlegroups.com>
References: <1141154405.709674.325760@t39g2000cwt.googlegroups.com>
	<7e9902tg2t188i2u265tg79m9tmpv70mrt@4ax.com>
	<1141155627.666491.200290@i40g2000cwc.googlegroups.com>
Message-ID: <du2a4i$kr7$1@atlantis.news.tpi.pl>

SolaFide napisa?(a):

> The problem is on Windows: when I run c:\python24\myprogram.py, it has
> a command window open up. If I close it, the program ends. So I want it
> to run without opening that window.

Give it .pyw extension or start using pythonw.exe instead of python.exe.

-- 
Jarek Zgoda
http://jpa.berlios.de/


From vania.smirk at gmail.com  Mon Feb 13 15:51:25 2006
From: vania.smirk at gmail.com (VSmirk)
Date: 13 Feb 2006 12:51:25 -0800
Subject: hard disk activity
In-Reply-To: <1139859890.407497.124870@o13g2000cwo.googlegroups.com>
References: <1139850420.902979.71620@o13g2000cwo.googlegroups.com>
	<g9i1v1lbf2rhmgskmkh5f9mt73s67umckk@4ax.com>
	<1139857505.376840.37440@g43g2000cwa.googlegroups.com>
	<1139859890.407497.124870@o13g2000cwo.googlegroups.com>
Message-ID: <1139863885.755813.324450@g47g2000cwa.googlegroups.com>

Pretty much, yeah.  Except I need diffing a pair of files that exist on
opposite ends of a network, without causing the entire contents of the
file to be transferred over that network.

Now, I have the option of doing this:  If I am able to determine that
(for instance) bytes 10468 to 1473 in a 849308 byte file are the only
segment that has changed, I can send that range over the network and
insert it into the right place; and then, with a downtime overnight, I
can do a file-copy synchronization to ensure there were no errors
during the day.  (I'm reading this and wondering if it even makes
sense, sorry if it doesn't.)

But the trick in my mind is figuring out which specific bytes have been
written to disk.  That's why I was thinking device level.  Am I going
to have to work in C++ or Assembler for something like this?

Sorry if this sounds like a newbie question.  I've been working with
Python long enough to know that someone out there has already solved
one or another of a really obscure problem.  So I thought I'd take a
stab at it.

Thanks everyone for the great links. 

V



From johnmc at velseis.com.au  Thu Feb  9 17:52:36 2006
From: johnmc at velseis.com.au (John McMonagle)
Date: Fri, 10 Feb 2006 08:52:36 +1000
Subject: Natural Language Date Processing.
In-Reply-To: <43EB0185.9070009@adrhinum.de>
References: <mailman.1544.1139316354.27775.python-list@python.org>
	<43E8D051.1080801@adrhinum.de>
	<mailman.1560.1139336482.27775.python-list@python.org>
	<43EB0185.9070009@adrhinum.de>
Message-ID: <1139525556.18246.16.camel@cornell>

On Thu, 2006-02-09 at 09:47 +0100, Michael Amrhein wrote:
> Andrew Gwozdziewycz schrieb:
> >> You may take a look at http://labix.org/python-dateutil
> >> Have fun
> >> Michael
> >>
> > 
> > Looks like it does a good job parsing dates, but doesn't seem to do
> > english dates. I found a javascript implementation of a few functions
> > that will probably be relatively easy to port to python. Whether or
> > not it'll perform well is another story... Thanks for the help.
> > 
> > --
> > Andrew Gwozdziewycz <apgwoz at gmail.com>
> > http://ihadagreatview.org
> > http://plasticandroid.org
> 
>  >>>from dateutil.parser import parse
>  >>>parse("April 16th, 2003")
> datetime.datetime(2003, 4, 16, 0, 0)
>  >>>parse("4/16/2003")
> datetime.datetime(2003, 4, 16, 0, 0)
> 
> Aren't these "english dates"?

I suspect the OP is referring to "english dates" as non-US format - to
follow the international convention (DD/MM/YYYY).

You can use the dayfirst parameter to the parse function to always
assume international date format:

US Format:
>>> parse("10/12/2004")
datetime.datetime(2004, 10, 12, 0, 0)

International format:
>>> parse("10/12/2004", dayfirst=True)
datetime.datetime(2004, 12, 10, 0, 0)


John




-- 
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.



From dan at tangledhelix.com  Wed Feb  1 12:28:47 2006
From: dan at tangledhelix.com (Dan Lowe)
Date: Wed, 1 Feb 2006 12:28:47 -0500
Subject: simple perl program in python gives errors
In-Reply-To: <0jq0u1diherpq56ve06m1iu7qqovgp518u@4ax.com>
References: <1138639924.500376.208600@z14g2000cwz.googlegroups.com>
	<43df635b_1@news.bluewin.ch>
	<mailman.1291.1138724309.27775.python-list@python.org>
	<0jq0u1diherpq56ve06m1iu7qqovgp518u@4ax.com>
Message-ID: <59676411-5556-424A-89D4-2B9A8BD607A7@tangledhelix.com>


On Feb 1, 2006, at 7:59 AM, Tim Roberts wrote:

> Dan Lowe <dan at tangledhelix.com> wrote:
>>
>> Not sure if you typo'd that, but that should read:
>>
>> a += 200000 * 140000
>> print a
>
> Did you try to run that?

Well, I did, but I had given 'a' a value first. And now I'm thinking  
that I may have forgotten some of the earlier thread... where I  
suppose the point was that this doesn't work when 'a' hasn't already  
been set. I was focusing on = vs += ...

So in that case, please ignore me :-)

  -dan

-- 
Black holes are where God divided by zero.  -Steven Wright




From carsten at uniqsys.com  Wed Feb 15 11:51:00 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 15 Feb 2006 11:51:00 -0500
Subject: kwargs keyword evaluation
In-Reply-To: <1140021611.026892.85790@f14g2000cwb.googlegroups.com>
References: <1140021611.026892.85790@f14g2000cwb.googlegroups.com>
Message-ID: <1140022260.22048.71.camel@dot.uniqsys.com>

On Wed, 2006-02-15 at 11:40, tzellman at gmail.com wrote:
> Ok, so here is my situation:
> 
> Let's assume I have a function that makes good use of the kwargs
> parameter. It requires that there is a certain "format" for the kwargs
> keywords. (I am using Django, btw). The format is like such:
> "SOMEVAL__exact", etc., where SOMEVAL is some value that it parses from
> the keyword.
> 
> Now, I want to call this function, specifying the kwargs. The problem
> is that I want to dynamically set the kwargs. For example, I don't want
> to hard code in the name like such:
>     function_call(name__exact="Tom")
> 
> I want to generate the keyword on the fly. So, I want to do this:
> (assume someVar == 'name' for now)
> keyword = someVar + "__exact"
> 
> The problem:
> I need to know how to get it to use the VALUE of the keyword for the
> keyword.
> 
> 
> My thoughts:
> (1) Maybe I can override the kwargs parameter by doing such:
> function_call(kwargs={keyword:"Tom"})
> *loud buzzer* Nope. (as expected)
> 
> (2) Maybe I can just pass it in:
> function_call(keyword="Tom")
> Nope! (as expected, it tries to use 'keyword' as the keyword)

The correct answer is behind door number 3:

some_dict = {keyword: "Tom"}
function_call(**some_dict)

HTH,

Carsten.




From aleaxit at yahoo.com  Mon Feb 20 15:03:05 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 20 Feb 2006 12:03:05 -0800
Subject: Unintended inheritance
References: <1140461082.972776.28090@g14g2000cwa.googlegroups.com>
Message-ID: <1hb23fp.icnshja9l7hhN%aleaxit@yahoo.com>

Kay Schluehr <kay.schluehr at gmx.net> wrote:
   ...
> To prevent unintended inheritance C# introduced a relatively complex
> contract semantics using three modifiers virtual, override and new. Is
> this issue serious for Python programmers, in particular for those
> working in larger projects ( Twisted, Zope ... ) or is it not? If not,
> why not?

I have not found it to be a particular problem (in C++ as well as in
Python or Java), because subclasses' coupling to superclasses is too
strong anyway to expect everything to just work smoothly when the
superclass's interface is changed, and even the most semidecent of
unittests easily catch this specific problem -- obviously all subclasses
must be recompiled and tested when a superclass's interface is changed
in any way. Other kinds of coupling are subtler and more problematic
(not so much in Python as in C++, I'd say, but it's arguable).

Lakos' book on large-scale design for C++ has good advice on dependency
control, which boils down to (WAY oversimplifying): each component must
expose to all others only unchanging abstract interfaces; anything
depending on anything beyond an abstract interface (as a subclass must)
must be in the same component as what it depends on.  Inheritance, while
way handy, introduces too-strong coupling (==dependencies) to be freely
used across independently developed and maintained components; and any
change in interface (I would argue, in fact, most any change in
PROTOCOL, which is a stronger constraint) must occur on new, separate
interfaces (which may well extend the existing ones, of course).

Yes, frameworks (separately developed, large components which are
*supposed* to be used via inheritance by separately developed and
maintained components) are quite problematic in terms of Lakos' rules
and guidelines (if you're at all interested in these subjects you should
surely read Lakos' book, anyway: no summary can do it justice). But I
believe (with no real-world experience of C#, admittedly) that they will
remain essentially just as problematic with C#'s complex rules -- a new
release of a framework, which changes protocols, will still be able to
break uncountable independently developed and maintained smaller
components, and the fact that the compiler catches the breakage (if, of
course, the other components DO get recompiled) rather than relying on
semidecent unittests is scant consolation -- there's still no bound to
the amount of work that may be needed to repair the wreckage.


Alex


From greg.landrum at gmail.com  Mon Feb 20 11:44:17 2006
From: greg.landrum at gmail.com (greg.landrum at gmail.com)
Date: 20 Feb 2006 08:44:17 -0800
Subject: Scientific Computing with NumPy
In-Reply-To: <mailman.2086.1140244636.27775.python-list@python.org>
References: <ds7bvh$ab1$2@gemini.csx.cam.ac.uk>
	<1140224495.798167.248550@z14g2000cwz.googlegroups.com>
	<mailman.2086.1140244636.27775.python-list@python.org>
Message-ID: <1140453857.206396.213050@z14g2000cwz.googlegroups.com>


Terry Reedy wrote:
> "kpp9c" <kp8 at mac.com> wrote in message
> news:1140224495.798167.248550 at z14g2000cwz.googlegroups.com...
> > Numeric, Numarray, & Numpy... some one stick a screwdriver in my
> > forehead and end the madness that Numeric has become.
>
> > For crying all night! Numpy was Numeric's nickname
>
> Given that NumPy *is* an updated version of Numeric, with the same basic
> interface, I think the name quite appropriate.  It also works well as a
> partner for SciPy.

Which, to make the confusion even worse, is *not* the updated version
of Scientific Python.

I'm with the previous author: this naming is a mess.

-greg



From ptmcg at austin.rr._bogus_.com  Thu Feb  2 23:20:23 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Fri, 03 Feb 2006 04:20:23 GMT
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<iUwEf.24484$1%5.21795@tornado.texas.rr.com>
	<1138928166.272387.51110@g44g2000cwa.googlegroups.com>
Message-ID: <bSAEf.24523$1%5.10519@tornado.texas.rr.com>

<n.estner at gmx.de> wrote in message
news:1138928166.272387.51110 at g44g2000cwa.googlegroups.com...
> Definitely looks interesting. I'd like it more if it was more explicit,
> but still, it does look nice.
>
> I guess you could make it recursion-safe if you saved/restored the
> global "__" variable before/after calling the actual function, and
> probably there's a way to make it thread-safe, too. But how would you
> make it generator-safe? Also, wouldn't lambda's you pass around from
> object to object be bound to use the wrong instance? How would you fix
> this code:
>
> class TestA:
>     @memberFunction
>     def do(f):
>         print f()
>
>
> class TestB:
>     @memberFunction
>     def do(x):
>         x.do(lambda : __)
>
> TestB().do(TestA()) # should print out TestB, does print out TestA
>
>
> There really should be something like a wiki for
> "selfishness"-proposals with pros and cons, so I could have looked at
> some before thinking about my own one...
>
Here's another pass:

__ = None  #initialize global __
def memberFunction(f):
    def func(self,*args,**kwargs):
        global __
        save__ = __
        globals()["__"] = self
        try:
            return f(*args,**kwargs)
        finally:
            __ = save__

    func.__name__ = f.__name__
    func.__doc__ = f.__doc__
    func.__dict__.update(f.__dict__)
    return func


class Test:
    @memberFunction
    def __init__(x,y):
        __.x = x
        __.y = y

    @memberFunction
    def mult():
        "Multiply the two member vars"
        return __.x * __.y


t = Test(5,4)
print t.mult()
print dir(t)
print t.mult.__doc__

class TestA:
    @memberFunction
    def do(f):
        print f()


class TestB:
    @memberFunction
    def do(x):
        z = __  # lambda's shouldn't directly reference '__'
        x.do(lambda : z)

TestB().do(TestA())

Prints out:
20
['__doc__', '__init__', '__module__', 'mult', 'x', 'y']
Multiply the two member vars
<__main__.TestB instance at 0x009DA4E0>





From rridge at csclub.uwaterloo.ca  Sat Feb 25 19:55:54 2006
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 25 Feb 2006 16:55:54 -0800
Subject: Pure python implementation of string-like class
In-Reply-To: <dtqd37$2he$1@apollon.grec.isp.9tel.net>
References: <20060225.102645.74687871.kayama@st.rim.or.jp>
	<mailman.2433.1140880297.27775.python-list@python.org>
	<1140891600.822510.189140@v46g2000cwv.googlegroups.com>
	<dtqd37$2he$1@apollon.grec.isp.9tel.net>
Message-ID: <1140915354.024788.25720@z34g2000cwc.googlegroups.com>


Xavier Morel wrote:
> Not if you're still within Unicode / Universal Character Set code space.

Akihiro Kayama in his original post made it clear that he wanted to use
a character set larger than entire Unicode code space.

                                      Ross Ridge



From bj_666 at gmx.net  Mon Feb 20 04:40:42 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Mon, 20 Feb 2006 10:40:42 +0100
Subject: Quesion about the proper use of __slots__
References: <1140424508.393412.79140@o13g2000cwo.googlegroups.com>
	<43f9825e$0$4777$636a55ce@news.free.fr>
	<1140426860.033363.237150@o13g2000cwo.googlegroups.com>
Message-ID: <pan.2006.02.20.09.40.40.151683@gmx.net>

In <1140426860.033363.237150 at o13g2000cwo.googlegroups.com>, Zefria wrote:

> Also, I don't generally do any optimization at all yet (as a highschool
> student projects get trashed often enough no to bother over), but in
> this special case I'm expecting each "carrier" to have up to 150
> fighters, and 3 to 5 carriers for each of the two teams, which comes
> out to be quite large.

That's 750 fighter objects.  This is not a "large" amount of objects.  So
I think it's premature optmization.  Especially because you think of using
__slots__ without actually trying if the program uses too much memory.

Ciao,
	Marc 'BlackJack' Rintsch


From klappnase at web.de  Thu Feb  9 05:09:37 2006
From: klappnase at web.de (klappnase at web.de)
Date: 9 Feb 2006 02:09:37 -0800
Subject: Using ioctl
Message-ID: <1139479777.062683.85340@g47g2000cwa.googlegroups.com>

Hello,

I am writing an app that records from the soundcard using ossaudiodev.
In the OSS programmer's guide they recommend when reading data
fragments from the soundcard
to use the fragment size as it is requested by the driver. According to
the programmer's guide
the ioctl call to determine the requested fragment size is:

    int frag_size;
    if ioctl(audio_fd, SNDCTL_DSP_GETBLKSIZE, &frag_size) == -1)
        error();

Unfortunately this procedure is not implemented in the ossaudiodev
module, so I
tried to write it myself.
>From reading the fcntl module's docs, I came to the following solution:

    try:
        f = array.array('h', [0])
        fcntl.ioctl(audio_fd, ossaudiodev.SNDCTL_DSP_GETBLKSIZE, f, 1)
        frag_size = f.tolist()[0]
    except:
        frag_size = -1
    if frag_size <= 0:
        frag_size = 4096


This *seems* to work, I tried several soundcards and got frag_size
values like 4096, 8192 or 16384 .
However I am not really sure about what I am doing there, so I would
feel more confident
if anyone could explain how ioctl is supposed to be used ( I also felt
that I should use
the try...except block for the call in case it fails, but I don't have
an idea "except *what*").

Any hints are much appreciated.

thanks in advance

Michael



From fredrik at pythonware.com  Tue Feb 21 12:17:25 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 21 Feb 2006 18:17:25 +0100
Subject: No
References: <1140534490.873612.64280@g47g2000cwa.googlegroups.com><mailman.2245.1140537111.27775.python-list@python.org>
	<1140539240.807314.283280@g43g2000cwa.googlegroups.com>
Message-ID: <dtfhv7$css$1@sea.gmane.org>

"Gaz" wrote:

> OSError: [Errno 2] No such file or directory: 'c:/'
>       args = (2, 'No such file or directory')
>       errno = 2
>       filename = 'c:/'
>       strerror = 'No such file or directory'
>
> Crazy... and if i use c:\, i get a 500 error.

that's probably because "c:\" is a syntax error:

>>> "c:\"
  File "<stdin>", line 1
    "c:\"
        ^
SyntaxError: EOL while scanning single-quoted string

but since you're getting a "500 error" instead, it sure sounds like you
forgot to tell us *how* you're running your scripts... (server, platform,
python version, etc).

</F>





From johnzenger at gmail.com  Tue Feb 28 11:13:20 2006
From: johnzenger at gmail.com (johnzenger at gmail.com)
Date: 28 Feb 2006 08:13:20 -0800
Subject: comple list slices
In-Reply-To: <mailman.2516.1141136527.27775.python-list@python.org>
References: <mailman.2516.1141136527.27775.python-list@python.org>
Message-ID: <1141143200.110570.51680@u72g2000cwu.googlegroups.com>

Python lets you iterate through a list using an integer index, too,
although if you do so we will make fun of you.  You can accomplish it
with a while loop, as in:

i = 0
while i < len(rows):
   if rows[i] == "This code looks like BASIC without the WEND, doesn't
it?":
      rowgroups.append("Pretty much.")
   i += 1     # or i += rowspan, whatever.

Do not try to do this with a for loop.  In Python, "for i in xrange(5)"
is more like a "foreach $i ( {0,1,2,3,4,5})" in Perl, so changing i in
the loop will not change the value of i on the next loop iteration.



From eight02645999 at yahoo.com  Thu Feb 16 04:59:00 2006
From: eight02645999 at yahoo.com (eight02645999 at yahoo.com)
Date: 16 Feb 2006 01:59:00 -0800
Subject: pymssql and date format
Message-ID: <1140083940.647586.313700@o13g2000cwo.googlegroups.com>

hi
i am using pymmsql to query a date column in MSSQL database table.
However the result shows for example
(datetime.datetime(2006, 2, 16, 17, 50, 19) which is supposed to be
2006-02-16 17:50:19.000
anyway to correct query a date column using pymssql so that it gives
the correct date format? thanks



From iansan at gmail.com  Thu Feb  9 18:48:35 2006
From: iansan at gmail.com (IamIan)
Date: 9 Feb 2006 15:48:35 -0800
Subject: Help with os.spawnv
Message-ID: <1139528915.558251.107240@f14g2000cwb.googlegroups.com>

I've had to migrate back to Python 2.1 and am now trying to use
os.spawnv to get around a memory leak (either in Python or ArcGIS or
both) in a geoprocessing script.

This script (Second Script) gets each Ascii file in the workspace,
converts it to a raster, sets the spatial reference, and hillshades it.
The script works on its own. In the Main Script I can successfully pass
parameters in a list, but no geoprocessing is ever initiated when using
os.spawnv. No errors are being thrown so I don't have a traceback to
post. Help getting this straightened out would be EXTREMELY
appreciated!


Main Script

# Import subprocess module
import os, sys

# Define arguments for subprocess
pyPath = "E:\\Python242\\python.exe"
pyScript = "E:\\Documents and
Settings\\Administrator\\Desktop\\Ian\\GIS\\Python\\subProcess2.py"
workspace = "E:\\GISTest"

# Get a list of ASCII files in the workspace for ASCII To Raster
conversion
filenames = os.listdir(workspace)
filenames = [filename.lower()
for filename in filenames
if (filename[-4:].lower() == ".asc" and filename[0] != "-" )]
for filename in filenames:
    # Define Img filename, truncating .asc from inAscii filename
    inAscii = workspace + "\\" + filename
    outImg = workspace + "\\" + filename[:-4] + ".img"

    # Create parameter list
    parameterList = []
    # First parameter is the name of the Python executable
    parameterList.append('python.exe')
    # Second parameter is the full path of the Python script
    parameterList.append(pyScript)
    # The following parameters are the arguments for the Batch script
    parameterList.append(filename)
    parameterList.append(inAscii)
    parameterList.append(outImg)
    parameterList.append(outHill)
    print parameterList
    # Run subprocess
    os.spawnv(os.P_WAIT, pyPath, parameterList)
    print parameterList

Second Script

I can't post this verbatim for work reasons, but basically it goes:

import sys, os, win32com.client, string
gp = win32com.client.Dispatch("esriGeoprocessing.GpDispatch.1")
gp.SetProduct("ArcInfo")
gp.CheckOutExtension("Spatial")

# For each ASCII file, convert into IMG format
filename = sys.argv[1]
inAscii = sys.argv[2]
outImg = sys.argv[3]
outHill = sys.argv[4]

Do Ascii to raster conversion using inAscii, creating outImg

Set spatial reference

Hillshade using outImg, creating outHill

Convert each hillshade to IMG format, using outHill



From eternalsquire at comcast.net  Sun Feb 26 00:33:31 2006
From: eternalsquire at comcast.net (The Eternal Squire)
Date: 25 Feb 2006 21:33:31 -0800
Subject: Is Python a Zen language?
In-Reply-To: <1140903119.580735.108440@e56g2000cwe.googlegroups.com>
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
	<1140878147.541074.233540@i40g2000cwc.googlegroups.com>
	<1140879469.853398.322850@i40g2000cwc.googlegroups.com>
	<1140903119.580735.108440@e56g2000cwe.googlegroups.com>
Message-ID: <1140932011.884832.38020@j33g2000cwa.googlegroups.com>


Kay Schluehr wrote:
> John Coleman wrote:
> > Ron Stephens wrote:
> > > Actually, Python has the distinction of being both a great tool
> > > language *and* a great Zen language. That's what makes Python so cool
> > > ;-)))
> > >
> > > Ron Stephens
> > > Python411
> > > www.awaretek.com/python/index.html
> >
> > This would explain why the question is so hard to answer. It is a
> > slam-dunk that Lisp is Zen and VBA is tool - but python really is a bit
> > hard to classify. This is somewhat similar to the way that python seems
> > to straddle the gap between imperative and functional languages. It has
> > something from each worlds (whether it has the *best* from each world
> > is a separate question)
> >
> > -John Coleman
>
> There is something that worries me about Lisp. If you are interested in
> the history of Lisp and some non-technical aspects of its culture I can
> recommend the writings of Richard Gabriel, who was one of the leaders
> of the CL standardisation commitee and founder of the Lisp company
> Lucid in the mid 80s that gone down a few years later. As it turned out
> that time Lisp was not capable to survive in what we call today a
> "heterogenous environment". It was strongly too self-centered. So I
> would actually invert you categories and say that a good tool achieves
> to have a non-dual nature instead of a strong I. With Lisp you might be
> a god but according to the Zen philosophy a god is a subordinated
> character that preserves the illusion of self-identity. A fine thing
> about a tool in this context is that you have to define its identity by
> a relationship to something that it is not.
>
> I have at times the impression that many people who talk about Zen
> philosophy confuse it with some home brewn mixture of platonism with
> its transgressive move towards the true reality, a stoic hedonism of
> contemplation and the taoistic being-in-doing. Zen on the other side is
> more radical: if you erase yourself there is no-one "who" is in the
> flow but chances are that you and the computer over there are the same
> thing.
>
> Kay

Too right.  If programming language was Zen there would be no
keyboards, just a telepathic interface.

But I have to admit I enjoy a solidly platonic relationship with
Python.  I prefer to
write things in the most beautiful way rather than in the most
efficient.  Its cost me a couple jobs, but the integrity of the product
always remains intact.

The Eternal Squire



From rob at digital-crocus.com  Fri Feb 17 04:09:13 2006
From: rob at digital-crocus.com (Robin Haswell)
Date: Fri, 17 Feb 2006 09:09:13 +0000
Subject: Determing whether two ranges overlap
References: <pan.2006.02.16.15.22.15.647369@digital-crocus.com>
Message-ID: <pan.2006.02.17.09.09.13.529231@digital-crocus.com>

Thanks guys, you've all been very helpful :-)

-Rob


From roy at panix.com  Fri Feb  3 21:54:18 2006
From: roy at panix.com (Roy Smith)
Date: Fri, 03 Feb 2006 21:54:18 -0500
Subject: Making Popen items terminate when program ends.
References: <1139011851.330605.262740@g14g2000cwa.googlegroups.com>
	<mailman.1403.1139021049.27775.python-list@python.org>
Message-ID: <roy-A807F8.21541703022006@reader2.panix.com>

In article <mailman.1403.1139021049.27775.python-list at python.org>,
 Peter Hansen <peter at engcorp.com> wrote:

> You should 
> either prefix your string with an "r" (just before the opening quotation 
> mark) or escape the backslashes (as in use "C:\\Folder..." instead of 
> just "C:\Folder").

Of the two alternatives, raw stings are much preferable to escaping 
backslashes (IMHO).


From anil.pundoor at gmail.com  Tue Feb 28 08:58:48 2006
From: anil.pundoor at gmail.com (anil.pundoor at gmail.com)
Date: 28 Feb 2006 05:58:48 -0800
Subject: Deleting items from Tix Tree
Message-ID: <1141135128.514753.149550@e56g2000cwe.googlegroups.com>

hi
 iam using Tix tree widget in my python script. how can i delete the
entire tree. i tried the following

self.msgTree = Tix.Tree(self.msgWin)
self.msgTree.hlist.delete()

but it thorws the following error

    self.msgTree.hlist.delete()
  File "/usr/local/lib/python2.2/lib-tk/Tix.py", line 320, in
__getattr__
    raise AttributeError, name
AttributeError: delete


can some one help me

thanks 
Anil



From reply.in.the.newsgroup at my.address.is.invalid  Thu Feb  9 09:55:40 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Thu, 09 Feb 2006 15:55:40 +0100
Subject: CGI Python FTP
References: <1139496499.898773.230240@g44g2000cwa.googlegroups.com>
Message-ID: <tllmu19urpuh2f3j5qcmddmqt73clamm0q@4ax.com>

dakman at gmail.com:
>I know PHP has support for uploading files from the browser to the
>server, but does python (not mod_py) have any modules for going about
>this?

http://www.python.org/doc/2.3.2/lib/node403.html
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/273844

-- 
Ren? Pijlman


From fabioz at esss.com.br  Tue Feb  7 05:07:31 2006
From: fabioz at esss.com.br (Fabio Zadrozny)
Date: Tue, 07 Feb 2006 08:07:31 -0200
Subject: [ANN] Pydev 1.0.1 release
In-Reply-To: <43E78E4F.20703@esss.com.br>
References: <43382E1F.3000600@esss.com.br> <434E801E.3010702@esss.com.br>
	<43E78E4F.20703@esss.com.br>
Message-ID: <43E87163.4020603@esss.com.br>

Hi All,

Pydev Extensions version 1.0.1 has been released
More details at http://www.fabioz.com/pydev


Pydev - Python IDE (Python Development Enviroment for Eclipse) version 
1.0.1 has been released.
More details at http://pydev.sf.net


Details for Release: 1.0 .1:

This was a 'single bug' release (it fixes an out-of-memory error when 
restoring the interpreter).

Cheers,

Fabio


-- 
Fabio Zadrozny
------------------------------------------------------
Software Developer

ESSS - Engineering Simulation and Scientific Software
www.esss.com.br

Pydev Extensions
http://www.fabioz.com/pydev

PyDev - Python Development Enviroment for Eclipse
http://pydev.sf.net
http://pydev.blogspot.com




From dickey at saltmine.radix.net  Wed Feb  8 19:00:59 2006
From: dickey at saltmine.radix.net (Thomas Dickey)
Date: Thu, 09 Feb 2006 00:00:59 -0000
Subject: Problem with curses and UTF-8
References: <mailman.1566.1139345769.27775.python-list@python.org>
	<43E9234B.6030108@v.loewis.de> <11ujl0hof3fql62@corp.supernews.com>
	<mailman.1617.1139425534.27775.python-list@python.org>
	<43EA6238.6040004@v.loewis.de>
	<mailman.1631.1139438813.27775.python-list@python.org>
Message-ID: <11ul1hrpsv1on63@corp.supernews.com>

Ian Ward <ian at excess.org> wrote:
> Martin v. L?wis wrote:

>> If that was Python's configure: don't do that. Instead, hack setup.py
>> to make it change the compiler/linker settings, or even edit the
>> compiler/linker line manually at first.

> Ok, that compiled.

same here - though it was not immediately not clear which copy of ncurses it's
using (not the shared libraries since I installed those with tracing - a
little odd for it to use the static library, but that's what the access time
tells me).

To check on that (since I wanted to read the ncurses trace),
I ran strace and ltrace to look for clues.

> Now when I run the same test:

> import curses
> s = curses.initscr()
> s.addstr('\xc3\x85 U+00C5 LATIN CAPITAL LETTER A WITH RING ABOVE\n')
> s.addstr('\xc3\xa5 U+00F5 LATIN SMALL LETTER O WITH TILDE')
> s.refresh()
> s.getstr()
> curses.endwin()

Testing this, and looking to see what's going on, I notice that python
is doing a

	setlocale(LC_ALL, "C");

before the addstr is actually called.  (ncurses never sets the locale;
it calls setlocale in one place to ask what it is).

That makes ncurses think it's not really doing UTF-8, of course.  What I
see on the screen is the U+00C5 comes out with a box and a "~E" (the
latter being ncurses' representation in POSIX for \0x85).

> This is what I see:

>   +00C5 LATIN CAPITAL LETTER A WITH RING ABOVE
>   +00F5 LATIN SMALL LETTER O WITH TILDE


> so, the UTF-8 characters didn't appear and the " U" at the beginning 
> became just " ".

well - running in uxterm I see the second line properly.  But some more
tinkering is needed to make python work properly.

-- 
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net


From aleaxit at yahoo.com  Fri Feb 17 10:11:55 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Fri, 17 Feb 2006 07:11:55 -0800
Subject: web crawler in python or C?
References: <1140069412.051298.242150@g44g2000cwa.googlegroups.com>
	<1140160313.229734.38170@g44g2000cwa.googlegroups.com>
Message-ID: <1haw5yl.158xxu11e69k9vN%aleaxit@yahoo.com>

Ravi Teja <webraviteja at gmail.com> wrote:
   ...
> The rule of thumb for all your Python Vs C questions is ...
> 1.) Choose Python by default.

+1 QOTW!-)


> 2.) If your program is slow, it's your algorithm that you need to check

Seriously: yes, and (often even more importantly) data structure.

However, often most important tip, particularly for large-scale systems,
is to consider your program's _architecture_ (algorithms are about
details of computation, architecture is about partitioning systems into
components, locating their deployment, and so forth). At a generic and
lowish level: are you for example creating a lot of threads each for a
small amount of work? Then consider reusing threads from a "worker
threads" pool. Or maybe you could avoid threads and use event-driven
programming; or, at the other extreme, have multiple processes
communicating by TCP/IP so you can scale up your system to tens or
hundreds of processors -- in the latter case, partitioning your system
appropriately to minimize inter process communication may be the
bottleneck. Consider UDP, when you can afford missing a packet once in a
while -- sometimes it may let you reduce overheads compared to TCP
connections.

Database connections, and less importantly database cursors, are well
worth reusing. What are you "caching", and what instead is getting
recomputed over and over?  It's possible to undercache (needless
repeated computation) but also to overcache (tying up memory and causing
paging). Are you making lots of system calls that you might be able to
avoid? Each system call has a context-switching cost, after all...

Any or all of these hints may be irrelevant to a specific category of
applications, but then, so can the hint about algorithms be. One cool
thing about Python is that it makes it easy and fast for you to try out
different approaches (particularly to architecture, but to algorithms as
well), even drastically different ones, when simple reasoning about the
issues leaves you undecided and you need to settle them empirically.

 
> Remember Donald Knuth's quote.
> "Premature optimization is the root of all evil in programming".

I believe Knuth himself said he was quoting Tony Hoare, and indeed
referred to this as "Hoare's dictum".


Alex


From sandravandale at yahoo.com  Sun Feb 26 23:25:14 2006
From: sandravandale at yahoo.com (Sandra-24)
Date: 26 Feb 2006 20:25:14 -0800
Subject: Modify the local scope inside a function
References: <1140911588.659020.7640@i39g2000cwa.googlegroups.com>
	<pan.2006.02.26.06.19.50.849311@REMOVETHIScyber.com.au>
Message-ID: <1141014314.168934.15830@p10g2000cwp.googlegroups.com>

Hey Crutcher, thanks for the code, that would work. I'm now debating
using that, or using function arguments to get the variables into the
namespace. This would require knowing the variables in the dict ahead
of time, but I suppose I can do that because it's part of the same
system that creates the dict. I'm just not very fond of having code
relating to one thing in more than one place, because it puts the onus
on the programmer to remember to change it in both places. Here I might
forgive it because it would make the generated code more readable.

It seems I created a fair amount of confusion over what I'm trying to
do. I use special psp like templates in my website. The template engine
was previously execing the generated template code. It uses special
environment variables that give it access to the functionality of the
web engine. These are what are in that scope dictionary of mine, and
why I exec the code in that scope.

However, I want to integrate a debugger with the web engine now, and
debugging execed generated code is a nightmare. So I save the generated
code as a function in a module that is generated by the template
engine. Unless I'm missing something about what you're saying, this
should now be faster as well, because afaik execed code has to be
compiled on the spot, wheras a module when you load it, is compiled (or
loaded from a .pyc file) at import time. So one import and repeated
function calls would be cheaper than repeated exec.

Thanks,
-Sandra



From rrr at ronadam.com  Sun Feb 26 16:33:32 2006
From: rrr at ronadam.com (Ron Adam)
Date: Sun, 26 Feb 2006 15:33:32 -0600
Subject: sort one list using the values from another list
In-Reply-To: <1140981038.788111.93500@j33g2000cwa.googlegroups.com>
References: <mailman.2447.1140969980.27775.python-list@python.org>
	<Bb-dncKoOeYvQ5zZRVn-uw@comcast.com>
	<1140981038.788111.93500@j33g2000cwa.googlegroups.com>
Message-ID: <9bpMf.109707$4l5.58949@dukeread05>

bearophileHUGS at lycos.com wrote:
> Your solution Steven Bethard looks very intelligent, here is a small
> speed test, because sorting a list according another one is a quite
> common operation.
> (Not all solutions are really the same, as Alex has shown).

Try this one.


def psort10(s1, s2):
     d = dict(zip(s2,s1))
     s1[:] = (d[n] for n in sorted(d.keys()))


It's faster on my system because d.keys() is already sorted.  But that 
may not be the case on other versions of python.

Ron



From grante at visi.com  Fri Feb 17 10:12:05 2006
From: grante at visi.com (Grant Edwards)
Date: Fri, 17 Feb 2006 15:12:05 -0000
Subject: Print a PDF transparently
References: <1140184955.674138.275010@o13g2000cwo.googlegroups.com>
Message-ID: <11vbpu58sll1b4f@corp.supernews.com>

On 2006-02-17, Daniel Crespo <dcrespo at gmail.com> wrote:

> I want to print a PDF right from my python app transparently. With
> "transparently" I mean that no matter what program handles the print
> petition, the user shouldn't be noticed about it.

This works for me:

   system("lpr whatever.pdf")

Or alternatively,

   os.popen("lpr"."w").write(myBigStringContainingPDF)

> For example, when I want to print a PDF, Adobe Acrobat fires and keep
> opened. This is what I don't want to happen (and I thing there are a
> lot of people who want this too). So I just want to send the PDF to the
> right handler and print it. That's all.

See above.

-- 
Grant Edwards                   grante             Yow!  hubub, hubub, HUBUB,
                                  at               hubub, hubub, hubub, HUBUB,
                               visi.com            hubub, hubub, hubub.


From scott.daniels at acm.org  Mon Feb  6 13:48:06 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Mon, 06 Feb 2006 10:48:06 -0800
Subject: critique my code, please
In-Reply-To: <mailman.1488.1139232769.27775.python-list@python.org>
References: <mailman.1488.1139232769.27775.python-list@python.org>
Message-ID: <43e798bf$1@nntp0.pdx.net>

Brian Blais asked for suggestions and critiques of his code.
For style, look at:
     http://www.python.org/peps/pep-0008.html

This is how I'd rewrite the first class:

     YESNO = ('No', 'Yes')

     class SimulationParams(object):
         '''Simulation Parameters setting up of a simulation'''
         def __init__(self):
             '''Build a new simulation control object'''
             self.epoch_number = 500
             self.iter_per_epoch = 500
             self.epoch_per_display = 1
             self.random_seed = 'clock'
             self.keep_every_epoch = 0
             self.save_input_vectors = 0

         def __repr__(self):
             return '''Epoch Number: %s
     Iter Per Epoch: %s
     Epoch Per Display: %s
     Random Seed: %s
     Keep Every Epoch: %s
     Save Input Vectors: %s
     '''         % (self.epoch_number, self.iter_per_epoch,
                    self.epoch_per_display, self.random_seed,
                    YESNO[self.keep_every_epoch],
                    YESNO[self.save_input_vectors])

Notes:
The docstrings I am using are too generic.  You know your app, so
do something more app-appropriate.

True is a version of 1, and False is a version of 0, so a dictionary
like {0:"No",1:"Yes",True:"Yes",False:"No"} is actually length 2.
I'd just use a constant mapping available anywhere.

'a %s b' % 13 is 'a 13 b', so no need for your seed type test.  If you
do want to make the type visually obvious, use %r rather than %s for
the seed.

Personally I'd choose shorter names, but this is more taste:
     class SimulationParams(object):
         '''Simulation Parameters setting up of a simulation'''
         def __init__(self):
             '''Build a new simulation control object'''
             self.epoch = 500
             self.iter_per_epoch = 500
             self.epoch_per_display = 1
             self.seed = 'clock'
             self.keep_epochs = False  # Since these seem to be booleans
             self.save_input = False  # Since these seem to be booleans
         ...

You also might consider making the __init__ provide defaulted args so
getting a different initial setup only requires your changing the setup:

         ...
         def __init__(self, epoch=500, iter_per_epoch=500,
                      epoch_per_display=1, seed='clock',
                      keep_epochs=False, save_input=False):
             '''Build a new simulation control object'''
             self.epoch = epoch
             self.iter_per_epoch = iter_per_epoch
             self.epoch_per_display = epoch_per_display
             self.seed = seed
             self.keep_epochs = keep_epochs
             self.save_input = save_input
         ...


More some other time.

--Scott David Daniels
scott.daniels at acm.org


From steve at holdenweb.com  Sun Feb 26 16:45:06 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 26 Feb 2006 16:45:06 -0500
Subject: Is Python a Zen language?
In-Reply-To: <1hbdcdc.1hnd616k1t3nsN%aleaxit@yahoo.com>
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>	<1140931766.200951.321320@t39g2000cwt.googlegroups.com>	<1140963005.123017.90890@t39g2000cwt.googlegroups.com>	<1140986927.452802.241330@e56g2000cwe.googlegroups.com>
	<1hbdcdc.1hnd616k1t3nsN%aleaxit@yahoo.com>
Message-ID: <dtt7gt$3mi$1@sea.gmane.org>

Alex Martelli wrote:
> Crutcher <crutcher at gmail.com> wrote:
>    ...
> 
>>No, I don't disagree that people do this. The history of "Zen and the
>>Art of X" dates from "Zen and the Art of Motorcycle Repair", which is
> 
> 
> That's Maintenance, not Repair.  Subtle but important distinction.
> 
Since the purpose of much maintenance is to avoid the necessity for repair.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From kylotan at gmail.com  Tue Feb 21 04:36:45 2006
From: kylotan at gmail.com (Ben Sizer)
Date: 21 Feb 2006 01:36:45 -0800
Subject: fast text processing
In-Reply-To: <dteiec$o7m$1@news.ox.ac.uk>
References: <dteiec$o7m$1@news.ox.ac.uk>
Message-ID: <1140514605.810748.306590@g14g2000cwa.googlegroups.com>

Maybe this code will be faster? (If it even does the same thing:
largely untested)


filehandle = open("data",'r',buffering=1000)
fileIter = iter(filehandle)

lastLine = fileIter.next()
lastTokens = lastLine.strip().split(delimiter)
lastGeno = extract(lastTokens[0])

for currentLine in fileIter:
    currentTokens = currentLine.strip().split(delimiter)
    currentGeno = extract(currentTokens[0])

    if lastGeno == currentGeno:
        table.markEquivalent(int(lastTokens[1]),int(currentTokens[1]))

        # prepare for next iteration
        lastLine = currentLine
        lastTokens = currentTokens
        lastGeno = currentGeno


I'd be tempted to try a bigger file buffer too, personally.

--
Ben Sizer



From siv.hansen at gmail.com  Tue Feb 28 19:16:54 2006
From: siv.hansen at gmail.com (Cruella DeVille)
Date: 28 Feb 2006 16:16:54 -0800
Subject: type = "instance" instead of "dict"
In-Reply-To: <1141087585.910134.17650@j33g2000cwa.googlegroups.com>
References: <1141069989.763239.191140@u72g2000cwu.googlegroups.com>
	<44035966$1_2@newspeer2.tds.net>
	<1141072746.685948.251040@j33g2000cwa.googlegroups.com>
	<440370ce$1_2@newspeer2.tds.net>
	<1141081177.003471.139820@t39g2000cwt.googlegroups.com>
	<1141087585.910134.17650@j33g2000cwa.googlegroups.com>
Message-ID: <1141172214.657248.256480@t39g2000cwt.googlegroups.com>

This is off topic, but if read the documentation is the answere to
everything why do we need news groups? The problem with the
documentation for Python is that I can't find what I'm looking for (and
I didn't even know what I was looking for either). And since every
language is well documented... there's no need for these groups.

I wouldn't ask here without trying to find the solution on my own
first.



From tim.golden at viacom-outdoor.co.uk  Wed Feb 15 11:22:14 2006
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Wed, 15 Feb 2006 16:22:14 -0000
Subject: file names longer than MAX_PATH under Windows 2003
Message-ID: <9A28C052FF32734DACB0A288A3533991044D256B@vogbs009.gb.vo.local>

[Sergey]

| "Tim Golden" <tim.golden at viacom-outdoor.co.uk> wrote in 
| message news:mailman.1900.1139925147.27775.python-list at python.org...
| [Sergey]
| 
| >I see from another post that CreateFile cannot open your file.
| >That puts it further away from Python, although it doesn't
| >explain how some other program can see the files. Can you use
| >os.startfile (or its equivalent win32api.ShellExecute from
| >pywin32)? Perhaps if you were to chdir to the directory in
| >question you'd be able to access the file.
| 
| I found error in filename (extra backslash) and now I can open file.
| But another trouble appeared: I cannot listdir so long name.
| I examined posixmodule.c... There are wcsncpy with hard limit 
| of MAX_PATH*2+5.
| So... RIP, my module...

Have a look at win32file.FindFilesIterator from the pywin32 extensions.
Maybe that can cope? (I haven't looked at the source).

<code>
import win32file
for (
  attr, created, accessed, written, size_hi, size_lo, 
  _, _, 
  filename, alt_filename
) in win32file.FindFilesIterator ("c:/temp/*"):
  print filename

</code>

TJG

________________________________________________________________________
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From rbell01824 at earthlink.net  Mon Feb  6 13:12:06 2006
From: rbell01824 at earthlink.net (puff)
Date: 6 Feb 2006 10:12:06 -0800
Subject: com how to PumpWaitingMessages in a thread
Message-ID: <1139249526.518993.237540@g14g2000cwa.googlegroups.com>

When interfacing to a COM object, is it possible to pump messages in a
thread?

I'm working on an application that automates IE and needs to monitor
IE events (yes I know about Pamie).  I'm able to start IE as follows:

    ie = win32com.client.DispatchWithEvents( object, YamieEvents )
    ie.event = win32event.CreateEvent(None,0,0,None)

An earlier post by Mark Hammond suggested the ie.event line as a fix to
an issue that seems to remain an issue in the current release.

The class YamieEvents catches a number of events and outputs trace
messages whenever an event occurs.  It looks like this:

class YamieEvents:

    def OnBeforeNavigate2(self,
                          pDisp=defaultNamedNotOptArg,
                          url=defaultNamedNotOptArg,
                          Flags=defaultNamedNotOptArg,
                          TargetFrameName=defaultNamedNotOptArg,
                          PostData=defaultNamedNotOptArg,
                          Headers=defaultNamedNotOptArg,
                          Cancel=defaultNamedNotOptArg):
        out = 'OnBeforeNavigate2 URL [%s] \n' % url
        out += '          Flags [%s] \n' %`Flags`
        out += '          TargetFrameName [%s]' % TargetFrameName
        print  out;
    # many more On event routines

I'm able to navigate and wait as follows seeing the event trace:

    ie.Navigate(url)
    try:
        ie.Navigate(url)
        WaitMsg()
    except pythoncom.com_error, details:
        PrintFlush( "Warning - could not open %s"%url, details )

Where WaitMsg() looks like this:


def WaitMsg(timeout=30, donetime=2000): # timeout in seconds, dontime
in milliseconds!
    timeStart = time.time()
    timeTic = timeStart
    while True:
        rc = win32event.MsgWaitForMultipleObjects(
            (ie.event,), 0, donetime, win32event.QS_ALLEVENTS)
        if rc == win32event.WAIT_OBJECT_0:
            pass
        elif rc == win32event.WAIT_OBJECT_0+1:
            pythoncom.PumpWaitingMessages()
        elif rc == win32event.WAIT_TIMEOUT:
            PrintFlush( ' WaitMsg: got donetime' )
            return True
        else:
            PrintFlush( 'Unrecognized event' )
        timeNow = time.time()
        if timeNow - timeStart > timeout:
            PrintFlush( ' ##### got timeout' )
            return False
        if timeNow - timeTic > 1:
            PrintFlush( '.', )
            timeTic = timeNow

So far everything seems to work fine.

However, I've encountered a difficulty when dealing with web pages
that have script that causes events AFTER the navigation is complete!
Since the message pump is not being run, these events are not processed
and IE appears to be hung (the script's page changes, navigations,
etc. do no occur).  I'm trying to work out how to run the message
loop on a thread so that messages are continually pumped and these
script modified pages are properly handled.

Modeling a solution after Mark Hammond's Appendix D threads example
I'm creating the message pump thread as follows:

    ie =
win32com.client.DispatchWithEvents("InternetExplorer.Application", \
                                            YamieEvents)
    ie.event = win32event.CreateEvent(None,0,0,None)
    ie.Visible = 1
    WaitMsg()
    # now IE is up and google is displayed, there is good reason to
think IE
    # is good and truely ready to be used
    #pass our ie com object to a thread to run the message loop
    # marshal the object
    object_stream = pythoncom.CoMarshalInterThreadInterfaceInStream( \
            pythoncom.IID_IDispatch, ie )
    args = (object_stream,)
    handle, id = win32process.beginthreadex( None, 0, PumpMessages,
args, 0 )

The thread function looks like this:

def PumpMessages(object_stream):
    pythoncom.CoInitialize()    # initialize com for single thread
    # unmarshal the DispatchWithEvents object
    object = pythoncom.CoGetInterfaceAndReleaseStream( \
        object_stream, pythoncom.IID_IDispatch)
    # convert to a useable DispatchWithEvents object
    ie = win32com.client.DispatchWithEvents( object, YamieEvents )
    # without this line, MsgWaitForMultipleObjects reports no attribute
event!?
    ie.event2 = win32event.CreateEvent(None,0,0,None)
    # now we should be in a position wait for events and pump messages
    timeStart = time.time()
    while True:
        rc = win32event.MsgWaitForMultipleObjects(
            (ie.event2,), 0, 1000, win32event.QS_ALLEVENTS)
        if rc == win32event.WAIT_OBJECT_0:
            PrintFlush( ' thread: event' )
        elif rc == win32event.WAIT_OBJECT_0+1:
            PrintFlush( ' thread: pump' )
            pythoncom.PumpWaitingMessages()
        elif rc == win32event.WAIT_TIMEOUT:
            PrintFlush( ' thread: tic' )
        else:
            PrintFlush( ' thread: unrecognized event' )
        if time.time() - timeStart > 40:
            PrintFlush( ' thread: got timeout' )
            break
    # be a good citizen and cleanup self
    ie = None
    pythoncom.CoUninitialize()

I've a question about this code since it was necessary to create a
second event for the ie object even though the original object and
it's event should (I believe) be available.  Am I doing something
wrong here?

Second when I test this code I see that the thread runs ( trace
messages thread: tic occur).  But events are not being pumped since
none of the event messages occur.  Eventually the thread times out.

Any clues as to what I'm missing?

I appreciate that this is a lengthy post.  I've tried to show only
the critical sections of code but the issue is complex.

Thanks for any help.



From chasonh at hotmail.com  Tue Feb  7 19:23:00 2006
From: chasonh at hotmail.com (Chason Hayes)
Date: Wed, 08 Feb 2006 00:23:00 GMT
Subject: Literal Escaped Octets
References: <pan.2006.02.06.04.50.15.325558@hotmail.com>
	<43e8b3e8.175976661@news.oz.net>
Message-ID: <pan.2006.02.08.00.32.59.529134@hotmail.com>

On Tue, 07 Feb 2006 15:06:49 +0000, Bengt Richter wrote:

> On Mon, 06 Feb 2006 04:40:31 GMT, Chason Hayes <chasonh at hotmail.com> wrote:
> 
>>I am trying to convert raw binary data to data with escaped octets in
>>order to store it in a bytea field on postgresql server. I could do this
>>easily in c/c++ but I need to do it in python. I am not sure how to read
>>and evaluate the binary value of a byte in a long string when it is a non
>>printable ascii value in python. I read some ways to use unpack from the
>>struct module, but i really couldn't understand where that would help. I
>>looked at the MIMIEncode module but I don't know how to convert the object
>>to a string. Is there a module that will convert the data? It seems to me
>>that this question must have been answered a million times before but I
>>can't find anything.
>>
> Have you considered just encoding the data as text in hex or base64, e.g.,
> 
>  >>> import binascii
>  >>> s = '\x00\x01\x02\x03ABCD0123'
>  >>> binascii.hexlify(s)
>  '000102034142434430313233'
>  >>> binascii.b2a_base64(s)
>  'AAECA0FCQ0QwMTIz\n'
> 
> which is also reversible later of course:
>  >>> h = binascii.hexlify(s)
>  >>> binascii.unhexlify(h)
>  '\x00\x01\x02\x03ABCD0123'
>  >>> b64 = binascii.b2a_base64(s)
>  >>> binascii.a2b_base64(b64)
>  '\x00\x01\x02\x03ABCD0123'
> 
> Regards,
> Bengt Richter

I had just about come to that conclusion last night while I was working on
it. I was going to use
import base64
base64.stringencode(binarydata)
and
base64.stringdecode(stringdata)

I then wasn't sure if I should still use the bytea field or just use a
text field.

Do you have a suggestion?



From jgardner at jonathangardner.net  Mon Feb 27 16:47:58 2006
From: jgardner at jonathangardner.net (Jonathan Gardner)
Date: 27 Feb 2006 13:47:58 -0800
Subject: Best python module for Oracle, but portable to other RDBMSes
In-Reply-To: <1140875323.918086.44890@i40g2000cwc.googlegroups.com>
References: <1140818561.458171.237850@p10g2000cwp.googlegroups.com>
	<1140826717.186051.261430@i39g2000cwa.googlegroups.com>
	<1140875323.918086.44890@i40g2000cwc.googlegroups.com>
Message-ID: <1141076878.227307.154360@i39g2000cwa.googlegroups.com>

I've never seen the points of those tools. Just lay it out on paper or
document it somewhere. Be consistant with your naming scheme and it
shouldn't be hard to see the relations. If found that the people who
don't understand how tables should relate to one another are also the
same people who don't understand the special arrows DBAs like to use.



From mooquack at suad.org  Thu Feb 16 20:36:47 2006
From: mooquack at suad.org (Kirk McDonald)
Date: Thu, 16 Feb 2006 17:36:47 -0800
Subject: calculating on matrix indices
In-Reply-To: <mailman.2027.1140133353.27775.python-list@python.org>
References: <mailman.2027.1140133353.27775.python-list@python.org>
Message-ID: <43f5274a$1@nntp0.pdx.net>

Brian Blais wrote:
> Hello,
> 
> In my attempt to learn python, migrating from matlab, I have the 
> following problem. Here is what I want to do, (with the wrong syntax):
> 
> from numpy import *
> 
> t=arange(0,20,.1)
> x=zeros(len(t),'f')
> 
> idx=(t>5)
> tau=5
> x[idx]=exp(-t[idx]/tau)  # <---this line is wrong (gives a TypeError)
> 
> #------------------
> 
> what is the best way to replace the wrong line with something that 
> works: replace all of the values of x at the indices idx with 
> exp(-t/tau) for values of t at indices idx?
> 
> I do this all the time in matlab scripts, but I don't know that the 
> pythonic preferred method is.
> 
> 
> 
>             thanks,
> 
>                 bb
> 
> 

You're specifying the type of x but not of t. You need to change the 
line where you assign t to:

t = arange(0, 20, .1, 'f')

I'm not sure why it doesn't figure that own on its own (since it 
obviously does hold floats), but this does cause it to work.

-Kirk McDonald


From qual at tiscali.de  Wed Feb  1 17:04:04 2006
From: qual at tiscali.de (Uwe Hoffmann)
Date: Wed, 01 Feb 2006 23:04:04 +0100
Subject: dependencies on subclassing Extensiontypes: tp_richcompare <-->
	tp_hash
Message-ID: <drrb15$mad$1@ulysses.news.tiscali.de>

Hi,

i have used Pyrex to build some python Extensionclasses. Now i
stumbled over the fact that if a subclass has a __hash__ method the
__richcmp__ of the base is not called.

# pseudocode

class Base:
	def __richcmp__():
	    print 'hi'

class Immutable(Base):
         def __hash__():
	    pass

if two instances of Immutable are compared ( e.g. Immutable() ==
Immutable() ) 'hi' is not printed.

Somebody (on pyrex mailing list) showed me that the cpython has this 
feature. If you look at typeobject.c you see the following sequence:

	if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_RICHCOMPARE) {
		if (type->tp_compare == NULL &&
		    type->tp_richcompare == NULL &&
		    type->tp_hash == NULL)
		{
			type->tp_compare = base->tp_compare;
			type->tp_richcompare = base->tp_richcompare;
			type->tp_hash = base->tp_hash;
		}
	}

That means either all three slots are inherited or no slot at all and 
only if there is not already one slot set.
Does anybody know why there is this strict relationship between
type->tp_richcompare and type->tp_hash . I have the feeling that this
should avoid some "incompatible" changes of __hash__ or __richcmp__ in 
the subclass but I have no clear picture (subclass compares equal but 
has a different hash ? ).

regards
      Uwe


From k.suess at gmx.net  Wed Feb 22 10:39:55 2006
From: k.suess at gmx.net (=?ISO-8859-1?Q?Katja_S=FCss?=)
Date: Wed, 22 Feb 2006 16:39:55 +0100
Subject: PyUNO with different Python
Message-ID: <43FC85CB.3060102@gmx.net>

Hi!
maybe somebody can give me an hint to my problem setting up PyUNO on my 
Mac to work with my Python not the Python delivered with OpenOffice.
As said in installation instructions I've set
   OPENOFFICE_PATH="/usr/lib/openoffice/program"
   export PYTHONPATH="$OPENOFFICE_PATH"
   export LD_LIBRARY_PATH="$OPENOFFICE_PATH"
according to my environment.

importing uno gives me this error:

>>> import uno
Traceback (most recent call last):
 File "<stdin>", line 1, in ?
 File "/Applications/OpenOffice.org 
2.0.app/Contents/openoffice.org2.0/program/uno.py", line 37, in ?
   import pyuno
ImportError: No module named pyuno

which means python finds uno but not pyuno (pyuno.dylib).

Any hints?
Regards, Katja


From ivoras at fer.hr  Sun Feb  5 20:36:31 2006
From: ivoras at fer.hr (Ivan Voras)
Date: Mon, 06 Feb 2006 02:36:31 +0100
Subject: Thread imbalance
In-Reply-To: <lukcu19iaqamsm5ohs618ckp169csrq8ql@4ax.com>
References: <1138912272.382474.13170@g44g2000cwa.googlegroups.com>	<ds3d35$mo6$2@bagan.srce.hr>
	<mailman.1427.1139097680.27775.python-list@python.org>
	<ds55tb$n00$1@bagan.srce.hr>
	<lukcu19iaqamsm5ohs618ckp169csrq8ql@4ax.com>
Message-ID: <ds698k$n5l$2@bagan.srce.hr>

Dennis Lee Bieber wrote:

> 	FYI: That's GLOBAL Interpreter Lock

Yes, sorry about the confusion.


From bronger at physik.rwth-aachen.de  Wed Feb 22 08:44:31 2006
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Wed, 22 Feb 2006 14:44:31 +0100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com> <43fbc788@usenet01.boi.hp.com>
	<87u0ar3gba.fsf@wilson.homeunix.com>
	<pan.2006.02.22.11.35.14.90948@REMOVETHIScyber.com.au>
Message-ID: <873bibjyo0.fsf@wilson.homeunix.com>

Hall?chen!

Steven D'Aprano <steve at REMOVETHIScyber.com.au> writes:

> On Wed, 22 Feb 2006 10:15:21 +0100, Torsten Bronger wrote:
>
>>> And, as someone in this thread has pointed out, it is likely
>>> that your important modern (x86) processor is not natively
>>> executing your x86 code, and indeed meets your definition of
>>> having "in its typical implementation an interpreting layer
>>> necessary for typical hardware".
>> 
>> Only if you deliberately misunderstand me.
>
> If the words you choose to use have implications which you failed
> to realise before saying them, don't blame the reader for spotting
> those implications.

To me it sounds like "Some hardware is harder than other".

>>> Another example: is Java the bytecode, which is compiled from
>>> Java the language, interpreted or not? Even when the HotSpot JIT
>>> cuts in?
>> 
>> It is partly interpreted and partly compiled.  That's why it's
>> faster than Python.
>
> But Python is partly interpreted and partly compiled too

It's byte-compiled for a VM, that's not the same, and you know it.
Sorry but I think we've exchanged all arguments that are important.
Any further comment from me would be redundant, so I leave it.

> [...]
>
>> [...]  However, I think that it's fair to make a distiction
>> between compiled and interpreted languages because it may affect
>> one's decision for one or the other.  [...]
>
> Would you rather use a blindingly fast interpreted language, or a
> slow-as-continental drift compiled one?
>
> This isn't a rhetorical question. [example]
>
> I'm sure that's hardly the only example of a speedy interpreted
> language beating a glacial compiled one.

I agree that the distinction between interpreted and compiled
languages is not as clear as between positiv and negative numbers,
however, neither anybody has claimed that so far, nor it is
necessary.  It must be *practical*, i.e. a useful rule of thumb for
decision making.  If you really know all implications (pros and
cons) of interpreted languages, it's are very useful rule in my
opinion.

> [...]
>
> But seriously... why not tell them the truth? Python is slower
> than some other languages because optimization for execution speed
> has not been the primary focus of Python's development. If you
> tell them that Python is slow because it is interpreted, they will
> believe that Python will always be slow.

I don't think that "Python's developers don't focus primarily on
speed" sounds better than "Python is interpreted".  Both suggests
that you must circumvent problems with Python's execution speed (we
all know that this works and how) because you can't count on
language improvements.  Even worse, evading "interpreted" may sound
like an euphemism and as if you want to hide unloved implementation
features, depending on your audience.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus            ICQ 264-296-646


From my.correo.basura at gmail.com  Wed Feb  8 18:34:54 2006
From: my.correo.basura at gmail.com (my.correo.basura at gmail.com)
Date: 8 Feb 2006 15:34:54 -0800
Subject: Pulling all n-sized combinations from a list
In-Reply-To: <1139440532.158500.16930@z14g2000cwz.googlegroups.com>
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>
	<7x7j85czje.fsf@ruckus.brouhaha.com>
	<1139436433.439927.175100@g47g2000cwa.googlegroups.com>
	<7xr76dwiy3.fsf@ruckus.brouhaha.com>
	<1139440532.158500.16930@z14g2000cwz.googlegroups.com>
Message-ID: <1139441694.062827.186910@o13g2000cwo.googlegroups.com>

> Ah, this definitely seems to work!  It's a lot nicer in appearance than
> my previous code, that's for sure.  It actually runs in approximately
> the same amount of time though.

As a side note, this problem will always be "slow". The number of
combinations grows exponentially with n. No matter how fast you
generate a combination, generating them all it's going to take a lot of
time if n is slighty bigger.



From simon at brunningonline.net  Wed Feb  8 11:05:52 2006
From: simon at brunningonline.net (Simon Brunning)
Date: Wed, 8 Feb 2006 16:05:52 +0000
Subject: Is Python good for web crawlers?
In-Reply-To: <1hafknf.1ft17us1sux13rN%aleaxit@yahoo.com>
References: <1139330008.270988.227170@g44g2000cwa.googlegroups.com>
	<dscj3o$nll$1@wake.carmen.se>
	<1hafknf.1ft17us1sux13rN%aleaxit@yahoo.com>
Message-ID: <8c7f10c60602080805j402cd5bcv1e799b7d49c1afa7@mail.gmail.com>

On 2/8/06, Alex Martelli <aleaxit at yahoo.com> wrote:
>
> Bot? me? did I fail a Turing test again without even noticing?!

If you'd noticed the test, you'd have passed.

;-)

--
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From onurb at xiludom.gro  Fri Feb 10 04:19:45 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Fri, 10 Feb 2006 10:19:45 +0100
Subject: breaking from loop
In-Reply-To: <1139557074.938577.281250@f14g2000cwb.googlegroups.com>
References: <1139557074.938577.281250@f14g2000cwb.googlegroups.com>
Message-ID: <43ec5acc$0$1731$636a55ce@news.free.fr>

Ritesh Raj Sarraf wrote:
> Hi,
> 
> Following is the code:
> 
> def walk_tree_copy(sRepository, sFile, sSourceDir, bFound = None):
>     try:
>         if sRepository is not None:

You're being overly defensive here. Passing None as first arg is clearly
a programming error, so the sooner you detect it the better. Hence, just
don't test, and let exceptions propagate.

>             for name in os.listdir(sRepository):
>                 path = os.path.join(sRepository, name)
>                 if os.path.isdir(path):
>                     walk_tree_copy(path, sFile, sSourceDir, bFound)
>                 elif name.endswith('.foo') or name.endswith('.bar'):
>                     if name == sFile:

Why do you *first* test on the extension, and *then* on the whole name ?
The boolean expression:
(name.endswith('.foo') or name.endswith('.bar')) and name == sFile
logically implies that :
sFile.endswith('.foo') or sFile.endswith('.bar')

So the first test is pretty useless...

Also, why hardcode such tests ? Python makes it easy to write generic
(hence reusable) code.


>                         try:
>                             shutil.copy(path, sSourceDir)
>                         except IOError, (errno, errstring):
>                             errfunc(errno, errstring)

??? What is this function doing ?

>                         except shutil.Error:
>                             print name + " is available in " +
> sSourceDir + "Skipping Copy!"

Don't assume the cause of the exception. FWIW, try the following snippet:

>>> f = open('test.txt', 'w')
>>> f.write('coucou')
>>> f.close()
>>> for i in range(10):
...     shutil.copy('test.txt', 'testcopy.txt')
...
>>>

Also, stdout is meant to be used for normal program outputs. Other
messages should go to stderr.


>                         bFound = True
>                         break
>                         return bFound

Err... this last statement won't be executed.

>     except OSError, (errno, strerror):
>         print errno, strerror
>
> This function allows me to walk into a directory based tree and search
> for files ending with .foo and .bar. My requirement is to copy
> .foo/.bar.
> Say in directory temp=>test=>test.bar is found. So shutil.copy will
> copy it. I want that once the copy is done, it should make bFound =
> True and get out.

What's the use of setting bFound to True ? If you want to get out
returning a value, just return that value :

# dummy exemple
def test(seq, target):
  for item in seq:
    if item == target:
      return True
  return False

> But since test directory is under temp, work_tree_copy makes two calls
> of the same function _but_ break only is able to get out from the inner
> call.
> 

You should first focus on making it work without worrying about error
handling. Ensure that all return path are covered (in your actual
implementation, your function always return None). Use a callback
function for testing if a file should be copied, so your code has a
chance of being reusable when specs evolve. And two hints:
 * exceptions are not only for error handling, they are also useful to
control flow of execution...
 * generators and iterators are great

AFAICT, what you're trying to do here is mainly to
1/ recursively search files matching a given condition in a directory tree
2/ do something with these files.

A solution could be to split your code accordingly:

def find_in_tree(tree_path, match):
  join = os.path.join
  isdir = os.path.isdir
  isfile = os.path.isfile
  for name in os.listdir(tree_path):
    fpath = join(tree_path, name)
      if isdir(fpath):
        for foundpath in find_in_tree(fpath, match)
          yield foundpath
      elif isfile(fpath) and match(fpath):
	yield fpath
  raise StopIteration

def find_and_copy_to(tree_path,
                     dest_path, match,
                     stop_on_first_match=False):
  done = []
  for fpath in find_in_tree(tree_path, match):
    if fpath not in done:
      shutil.copy(fpath, dest_path)
      done.append(fpath)
      if stop_on_first_match:
        break
  return done

match_foo_bar = lambda fpath: \
 fpath.endswith('.foo') or fpath.endswith('.bar')

done = find_and_copy_to(sRepository,
                        sSourceDir,
                        match_foo_bar,
                        stop_on_first_match=True)


NB1 : not tested

NB2: I'm not sure I clearly undestand your specs (you're mixing
functional specs and implementation details in your description of
you're trying to do), so this may not be exactly what you want...

Also some stylistic advices:

1/ hungarian notation is *evil* - and even worse in a dynamically typed
language. Better use explicit names. What's important is not the type of
a variable, but it's role.

2/ string formating is fine

print >> sys.stderr, \
        "%s is available in %s - skipping copy" % (filename, source_dir)


> Is there a better way to implement it ?

Probably. Anyway, the better implementation is usually no
implementation. What about:

find $Repository -name "*.bar" -exec cp {} $SourceDir/ \;

?-)


Well, time to have a coffee anyway...
HTH

--
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From pydecker at gmail.com  Mon Feb 13 15:50:45 2006
From: pydecker at gmail.com (Peter Decker)
Date: Mon, 13 Feb 2006 15:50:45 -0500
Subject: cyclic data structures
In-Reply-To: <Nc6If.1604$No6.38177@news.tufts.edu>
References: <Nc6If.1604$No6.38177@news.tufts.edu>
Message-ID: <ca55a9900602131250x28493203lcfd194dfc2474c4e@mail.gmail.com>

On 2/13/06, John Salerno <johnjsal at nospamgmail.com> wrote:
> I'm having some slight trouble understanding exactly why this creates an
> infinite loop:
>
> L = [1, 2]
> L.append(L)

'L' is a pointer to a list. You are now adding that pointer to the
very list it points to.

What you're looking for is:

L = [1, 2]
L.append(L[:])

--

# p.d.


From volker_grabsch at v.notjusthosting.com  Mon Feb  6 07:53:53 2006
From: volker_grabsch at v.notjusthosting.com (Volker Grabsch)
Date: 6 Feb 2006 12:53:53 GMT
Subject: triple quoted strings as comments
References: <1138667355.631379.249770@o13g2000cwo.googlegroups.com>
	<drppbn$3rg$1@wake.carmen.se>
	<roy-42D40A.08175201022006@reader2.panix.com>
	<hU2Ef.227454$7f1.7126132@phobos.telenet-ops.be>
	<slrnducg9o.2t1.grahn+nntp@frailea.sa.invalid>
Message-ID: <slrnduehn1.982.volker_grabsch@durin.mathematik.hu-berlin.de>

Jorgen Grahn wrote:
>>> [...] developer had 
>>> commented out about 50 lines of C++ code by just putting a /* at the top 
>>> and a */ at the bottom.
[...]
> ("#if 0" in C and C++ are better choices, but only marginally. Best is to
> remove the code unless you are sure it's needed again soon. Works in all
> languages.)

However, I'd only advise to do this if you are using a revision control.
Otherwise, you'll end up having a lot of "backup" files hanging around
which are even worse than multi-row comments. Or, even worse: If you
don't create backup files before removing code ...


Greets,

	Volker

-- 
Volker Grabsch
---<<(())>>---
\frac{\left|\vartheta_0\times\{\ell,\kappa\in\Re\}\right|}{\sqrt
[G]{-\Gamma(\alpha)\cdot\mathcal{B}^{\left[\oint\!c_\hbar\right]}}}


From wegwerp at gmail.com  Mon Feb 27 16:28:33 2006
From: wegwerp at gmail.com (Bas)
Date: 27 Feb 2006 13:28:33 -0800
Subject: Matplotlib logarithmic scatter plot
References: <1141073994.346490.16070@j33g2000cwa.googlegroups.com>
Message-ID: <1141075713.027689.66800@t39g2000cwt.googlegroups.com>

Try this, don't know if this works for al versions:

from pylab import *
x=10**linspace(0,5,100)
y=1/(1+x/1000)
loglog(x,y)
show()

If you only need a logarithm along one axis you can use semilogx() or
semilogy(). For more detailed questions go to the matplotlib mailing
list.

Cheers,
Bas



From fredrik at pythonware.com  Tue Feb  7 09:06:09 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 7 Feb 2006 15:06:09 +0100
Subject: Question about idioms for clearing a list
References: <mailman.1294.1138727665.27775.python-list@python.org>	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>	<mailman.1489.1139232969.27775.python-list@python.org>	<ds83kd$98m$1@sea.gmane.org>	<43E7F59B.9070009@REMOVEMEcyber.com.au>	<mailman.1537.1139297533.27775.python-list@python.org><1139300825.858426.12680@o13g2000cwo.googlegroups.com>
	<dsa3b8$l1h$2@sea.gmane.org>
Message-ID: <dsa9gh$e2o$1@sea.gmane.org>

Steve Holden wrote:

>> While the sentiment behind the list.clear() suggestion is noble, it is
>> an exercise in futility to design a language around the presumption
>> that other programmers are incapable of learning the basics of the
>> language.
>
> +1 QOTW

>> There was a pithy Tim Peters quotation to the effect that he was
>> unpersuaded by language proposals predicated on some hypothetical
>> average programmer not being smart enough to understand something that
>> the rest of us find to be basic.
>>
> Well, for those who can't find it you just provided a fairly pithy
> Raymond Hettinger quote :-)

for the record, the original quote is:

    The "of course, while *I* have no problem with this at all, it's
    surely too much for a lesser being" flavor of argument always rings
    hollow to me. Are you personally confused by the meanings for "+" that
    exist today? *Objecting* to the variations is a different story; I'm
    wondering whether you personally stumble over them in practice. I
    don't; Steven doesn't; I doubt that you do either. I'm betting that
    almost *nobody* ever does, in which case those "less nimble colleagues
    and students" must be supernaturally feeble to merit such concern.
          -- Tim Peters, 29 Apr 1998

</F> 





From onurb at xiludom.gro  Mon Feb 20 03:51:31 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Mon, 20 Feb 2006 09:51:31 +0100
Subject: editor for Python on Linux
In-Reply-To: <v3nhv19n1pjco7pm11u06nomd2j4mr38q2@4ax.com>
References: <dtai6e$23m$2@ariane.blic.net>
	<chlhv15ktc4u3adv34sgk63tok5vl9j50q@4ax.com>
	<43f8d9d3$0$3308$636a55ce@news.free.fr>
	<v3nhv19n1pjco7pm11u06nomd2j4mr38q2@4ax.com>
Message-ID: <43f98334$0$4777$636a55ce@news.free.fr>

Rene Pijlman wrote:
> F. Petitjean:
> 
>>Rene Pijlman:
>>
>>>vi
>>
>>I beg to disagree :-) Use ed
>>"Ed is the standard text editor."
>>http://www.gnu.org/fun/jokes/ed.msg.html
> 
> 
> That was 1991. This is 2006.

Yes, but that rant is still a pure jewel of geek madness.



-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From tjreedy at udel.edu  Wed Feb  8 13:30:08 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 8 Feb 2006 13:30:08 -0500
Subject: Question about idioms for clearing a list
References: <mailman.1294.1138727665.27775.python-list@python.org><1139231464.914400.37100@g44g2000cwa.googlegroups.com><mailman.1489.1139232969.27775.python-list@python.org><ds83kd$98m$1@sea.gmane.org><43E7F59B.9070009@REMOVEMEcyber.com.au><E78Gf.22893$Jd.14515@newssvr25.news.prodigy.net><mailman.1567.1139348019.27775.python-list@python.org>
	<1139355802.990667.11690@g14g2000cwa.googlegroups.com>
Message-ID: <dsddbe$pif$1@sea.gmane.org>


<bonono at gmail.com> wrote in message 
news:1139355802.990667.11690 at g14g2000cwa.googlegroups.com...
> I am confused. Could you explain this ? I was under the impression said
> above(mapping don't support slicing), until after I read the language
> reference. I don't think it is slicing as in the list slicing sense but
> it does use the term "extend slicing".
>
> http://www.python.org/doc/2.4.2/ref/slicings.html

I believe that extended slicing was introduced for multidimensional slicing 
of multidimensional arrays in Numerical Python.  Apparently, since such 
arrays are not indexed sequentially, they are considered as mappings.  The 
paragraph on extended slicing is much clearer if one knows how they are 
used in one of the numerical Python packages.

In the mathematical sense, a sequence can be considered to be a mapping of 
counts to whatever.  In some languages, sequences have been implemented 
literally as a mapping by 'associative arrays', the equivalent of Python's 
dict.  And dicts are sometimes used in Python to implement sparse arrays.

A set is not a mapping unless its members are all ordered pairs, as in a 
dict.

Terry Jan Reedy





From noway at sorry.com  Sat Feb  4 15:29:03 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Sat, 04 Feb 2006 20:29:03 GMT
Subject: fairly large webapp: from Java to Python. experiences?
References: <1139005746.363918.267370@g47g2000cwa.googlegroups.com>
	<1139018653.508049.182020@g43g2000cwa.googlegroups.com>
	<prVEf.7358$MF1.4951@fe08.lga>
Message-ID: <j88Ff.160530$65.4490774@twister1.libero.it>

John M. Gabriele wrote:

>> But once it is
>> there, Python is a good choice for web apps. Java is slow
>
> Slow? They're both dynamic languages, but Java is statically
> typed (with less work to do at runtime). For long-running processes,
> I'd guess that Java bytecode executes faster than Python bytecode.


It's not the raw computing performance that counts in this case. I got this
joke in my mail today:

Python:
print "%10.2f" % x

Java:
java.text.NumberFormat formatter = java.text.NumberFormat.getNumberInstance();
formatter.setMinimumFractionDigits(2);
formatter.setMaximumFractionDigits(2);
String s = formatter.format(x);
for (int i = s.length(); i < 10; i++) System.out.print(' ');
System.out.print(s);

Let alone the time it takes to write this routine, I'm hundered percent sure
that the Python's version is also faster at runtime. Python lets you write
pretty expressive code which is easy to maintain and where the computation cost
is easily at the C level. Also Python code is pretty bare-metal, so that
file.write or socket.write go to the syscall immediately. Try that in Java and
you'll find 30 layers of complex abstractions for doubtful benefits and obvious
slowness.
-- 
Giovanni Bajo




From cyberco at gmail.com  Sat Feb 25 10:23:45 2006
From: cyberco at gmail.com (cyberco)
Date: 25 Feb 2006 07:23:45 -0800
Subject: Import in a separate thread
In-Reply-To: <mailman.2426.1140871920.27775.python-list@python.org>
References: <1140869286.548125.17710@p10g2000cwp.googlegroups.com>
	<mailman.2426.1140871920.27775.python-list@python.org>
Message-ID: <1140881025.513094.236590@e56g2000cwe.googlegroups.com>

Well, it is for the python implementation for Nokia Series 60 phones,
and loading lots of modules in such constrained environments can
certainly slow things down. The splashscreen idea is what I want to do,
but that requires the loading to continue in a background thread.



From dfj225 at gmail.com  Mon Feb 20 16:07:59 2006
From: dfj225 at gmail.com (dfj225 at gmail.com)
Date: 20 Feb 2006 13:07:59 -0800
Subject: web crawler in python or C?
In-Reply-To: <1140069412.051298.242150@g44g2000cwa.googlegroups.com>
References: <1140069412.051298.242150@g44g2000cwa.googlegroups.com>
Message-ID: <1140469679.744798.191540@f14g2000cwb.googlegroups.com>

I think something that may be even more important to consider than just
the pure speed of your program, would be ease of design as well as the
overall stability of your code.

My opinion would be that writing in Python would have many benefits
over the speed gains of using C. For instance, you crawler will have to
handle all types of input from all over the web. Who can say what types
of malformed or poorly writen data it will come across. I think it
would be easier to create a system to handle this type of data in
Python than in C.

I don't want to pigeon-hole your project, but if it is for any use
other than a commercial product, I would say speed would be a concern
lower on the list than accurracy or time to develop. As others have
pointed out, if you hit many performance barriers chances are the
problem  is the algorithm and not Python itself.

I wish you luck and hope you will experiment in Python first. If your
crawler is still not up to par, at the very least you might come up
with some ideas for how Python could be improved.



From johnjsal at NOSPAMgmail.com  Thu Feb 16 16:44:36 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 16 Feb 2006 21:44:36 GMT
Subject: embedding python in HTML
In-Reply-To: <t6q9v1p2qcr0ntsau8i6q5glk89pfb4epq@4ax.com>
References: <GD5Jf.1637$No6.38292@news.tufts.edu>
	<t6q9v1p2qcr0ntsau8i6q5glk89pfb4epq@4ax.com>
Message-ID: <8n6Jf.1640$No6.38203@news.tufts.edu>

Rene Pijlman wrote:
> John Salerno:
> [Python alternative for PHP]
>> So to do this with Python, do I simply integrate it into the HTML as 
>> above, with no extra steps? 
> 
> You'd need something like the PHP engine, that understands Python rather
> than PHP.

My web server can run Python, fortunately. Now that they've turned it on 
for me, I wanted to try it out, but I didn't know how to go about 
writing a bit of code to stick into an HTML file.


From sakcee at gmail.com  Tue Feb 21 13:04:54 2006
From: sakcee at gmail.com (Sakcee)
Date: 21 Feb 2006 10:04:54 -0800
Subject: html parser , unexpected '<' char in declaration
In-Reply-To: <pkhlv1hkcrmh7li0t25p8bj6kojk6r781d@4ax.com>
References: <1140473997.262973.149260@f14g2000cwb.googlegroups.com>
	<mailman.2198.1140483714.27775.python-list@python.org>
	<1140488536.933840.65530@o13g2000cwo.googlegroups.com>
	<mailman.2200.1140489845.27775.python-list@python.org>
	<pkhlv1hkcrmh7li0t25p8bj6kojk6r781d@4ax.com>
Message-ID: <1140544023.224819.34080@o13g2000cwo.googlegroups.com>

thanks for the suggestions,

this is not happening frequently, actually this is the first time I
have seen this exception in the system, which means that some spam
message was generated with ill-formated html.
i guess the best way would be to check using regular expression and
delete the unclosed tags.



From iansan at gmail.com  Tue Feb 21 17:56:07 2006
From: iansan at gmail.com (IamIan)
Date: 21 Feb 2006 14:56:07 -0800
Subject: Exiting os.spawnv's subroutine
References: <1140215299.383562.57250@g14g2000cwa.googlegroups.com>
	<donn-8A2493.16121017022006@gnus01.u.washington.edu>
Message-ID: <1140562567.681998.243500@o13g2000cwo.googlegroups.com>

My code is below. As a single script there is no pause at the end of
the processing as there is with using os.spawnv... I am using the
P_WAIT value, and wonder if it is responsible for the extra time at the
end of each iteration. Could it take longer for the processing to be
"successful" when run under os.spawnv? Is there a way to manually send
a "success" exit code back to os.spawnv, rather than waiting for it?
Thanks.

Main script:
# Import subprocess modules
import os, sys, win32com.client

# Define arguments for subprocess
pyPath = "C:\\Python21\\python.exe"
contourScript = "C:\\Ian\\Python scripts\\subProcess2.py"
workspace = "D:\\GIS\\Test"

# Get a list of IMG files in the workspace for Contouring
filenames = os.listdir(workspace)
filenames = [filename.lower()
for filename in filenames
if (filename[-4:].lower() == ".img" and filename[0:2] != "h_" )]
for filename in filenames:

    # Define filenames
    print "Filename is " + filename
    inImg = workspace + "\\" + filename
    outContour50 = workspace + "\\contour50_" + filename[:-4] + ".shp"
    outContour100 = workspace + "\\contour100_" + filename[:-4] +
".shp"
    outContour200 = workspace + "\\contour200_" + filename[:-4] +
".shp"
    outContour500 = workspace + "\\contour500_" + filename[:-4] +
".shp"

    # Create parameter list
    parameterList = []

    # First parameter is the name of the Python executable
    parameterList.append('python.exe')

    # Second parameter is the full path of the Python script
    parameterList.append(contourScript)

    # The following parameters are the arguments for the Batch script
    parameterList.append(inImg)
    parameterList.append(outContour50)
    parameterList.append(outContour100)
    parameterList.append(outContour200)
    parameterList.append(outContour500)

    # Run subprocess
    os.spawnv(os.P_WAIT, pyPath, parameterList)

print "All done!"


Secondary script:
# Import system modules
import sys, win32com.client

# Create the geoprocessor object
gp = win32com.client.Dispatch("esriGeoprocessing.GpDispatch.1")

# Confirm license availability
print "ArcInfo license is " + str(gp.CheckProduct("ArcInfo"))
gp.SetProduct("ArcInfo")
gp.CheckOutExtension("Spatial")

# Set arguments to be passed to main script
inImg = sys.argv[1]
outContour50 = sys.argv[2]
outContour100 = sys.argv[3]
outContour200 = sys.argv[4]
outContour500 = sys.argv[5]

badImgList = []

try:
    # For each IMG file, contour at 50, 100, and 200 meter intervals
    gp.Contour_sa(inImg, outContour50, "50", "0", "1")
    print "Successfully contoured at 50 meter interval!"

    gp.Contour_sa(inImg, outContour100, "100", "0", "1")
    print "Successfully contoured at 100 meter interval!"

    gp.Contour_sa(inImg, outContour200, "200", "0", "1")
    print "Successfully contoured at 200 meter interval!"

    gp.Contour_sa(inImg, outContour500, "500", "0", "1")
    print "Successfully contoured at 500 meter interval!"
except:
    badImgList.append(filename)
    print filename + " is no good! It's been added to the list!"



From cvanarsdall at mvista.com  Thu Feb 16 12:21:42 2006
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Thu, 16 Feb 2006 09:21:42 -0800
Subject: Does python have an internal list/dictionary of functions?
Message-ID: <43F4B4A6.7070807@mvista.com>

Python Gurus:

Let me elaborate a bit more on this question.  Basically, I want to know 
if there is some data structure in python that maps a string function 
name to an address of a function or something to that nature.

If this is confusing, let me describe what I want to do and see if 
anyone has any ideas.

basically we have:

 >>>def functA():
...  pass

 >>> functA
<function functA at 80db128>

And what I'd like to do is:

 >>>__internalFuncDict__['functA']
<function functA at 80db128>

This is just for a little experimental project of mine, any help or 
pointers to the proper pages in the manual would be greatly 
appreciated.  Basically, I know that I can create something like this if 
I have to but I was very much hoping that something already existed 
somewhere that I could get to via python or by writing a C extension.

Thanks in advance!

-carl


-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From bonono at gmail.com  Sun Feb 12 07:33:51 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 12 Feb 2006 04:33:51 -0800
Subject: Is python very slow compared to C
In-Reply-To: <mailman.1776.1139745557.27775.python-list@python.org>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
	<1139743205.985196.254330@g43g2000cwa.googlegroups.com>
	<mailman.1776.1139745557.27775.python-list@python.org>
Message-ID: <1139747631.858424.145230@z14g2000cwz.googlegroups.com>


Felipe Almeida Lessa wrote:
> Em Dom, 2006-02-12 ?s 03:20 -0800, bonono at gmail.com escreveu:
> > However, to me, the strength of python is the batteries that is
> > included(and there are more and more coming).
>
> So .NET is as good as Python? Hmmm... I think the language itself is the
> best part of Python, its library is just a complement (a very good and
> relevant one, though).
.NET is not a language, IMO.



From diffuser78 at gmail.com  Wed Feb 15 17:17:05 2006
From: diffuser78 at gmail.com (diffuser78 at gmail.com)
Date: 15 Feb 2006 14:17:05 -0800
Subject: Poisson Distribution (for a newbie)
Message-ID: <1140041825.586531.287400@z14g2000cwz.googlegroups.com>

I am simulating an event where users come into the pool randomly
starting at time T=0, i.e. For Example, 2 users came at T= 0 into the
the pool, 3 users came at T= 1 into the the pool, 5 users came at T=2
,..........,54 users came at T=45 etc. As cumulative number of users
goes above 1024, we stop the process.

I want to mimic such kind of distribution using poison traffic ( a bell
shaped curve). I looked into wikipedia and some other tutorials but I
wasn't sure how many parameter does the above kind of distribution
would require.

Could somebody put some light on this issue.

PS:: This is not exactly a programming issue but since I was using it
in one of the Python programs, I thought somebody might have used
similar thing in past and could help. Thanks.



From grante at visi.com  Tue Feb 28 15:24:18 2006
From: grante at visi.com (Grant Edwards)
Date: Tue, 28 Feb 2006 20:24:18 -0000
Subject: Thread Question
References: <1141155072.500444.215130@v46g2000cwv.googlegroups.com>
Message-ID: <1209cbiq1kjbh06@corp.supernews.com>

On 2006-02-28, D <duncanm255 at hotmail.com> wrote:

> I have a client application that I want (behind the scenes) to check
> and make sure a remote host is up (i.e. by ping or TCP connect).  I'm
> assuming that, since I want this to go on "unknowingly" to the user,
> that I would put this in a thread.

Probably.

> My question is, how would I go about creating the thread?

Assuming foo is the function you want to start in a thread:

   threading.Thread(target=foo).start()

> I have seen examples that used classes, and other examples
> that just called one thread start command - when should you
> use one over another?

I'm not sure what you mean by "use classes" vs. "calling a
thread start command".  My example above uses a class
(threading.Thread) to create a thread object, and then calls
its start method.

-- 
Grant Edwards                   grante             Yow!  HELLO, little boys!
                                  at               Gimme a MINT TULIP!! Let's
                               visi.com            do the BOSSA NOVA!!


From jgardner at jonathangardner.net  Tue Feb 14 22:42:52 2006
From: jgardner at jonathangardner.net (Jonathan Gardner)
Date: 14 Feb 2006 19:42:52 -0800
Subject: How to cat None
In-Reply-To: <59xIf.16847$CZ4.13956@trnddc05>
References: <59xIf.16847$CZ4.13956@trnddc05>
Message-ID: <1139974972.401407.121250@g14g2000cwa.googlegroups.com>

You can just surround the offending value with str(...). You should
probably be doing that anyway, because the value might be a number or
something else not stringish.



From deets at nospam.web.de  Fri Feb 24 10:26:23 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 24 Feb 2006 16:26:23 +0100
Subject: chrtohex
References: <1140794594.653270.242720@e56g2000cwe.googlegroups.com>
Message-ID: <468n11Fa325dU1@uni-berlin.de>

luca72 wrote:

> Hello again my friends
> 
> here's my new problem.
> 
> How i can translate chr in to hex or int to integer value?

print "%x" % ord('a')

Diez




From kent at kentsjohnson.com  Wed Feb 15 12:25:01 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Wed, 15 Feb 2006 12:25:01 -0500
Subject: Which is faster? (if not b in m) or (if m.count(b) > 0)
In-Reply-To: <pan.2006.02.15.12.14.46.964790@REMOVETHIScyber.com.au>
References: <1139976842.179801.285400@z14g2000cwz.googlegroups.com>
	<pan.2006.02.15.07.44.08.876338@gmx.net>
	<pan.2006.02.15.12.14.46.964790@REMOVETHIScyber.com.au>
Message-ID: <43f35f8c$1_3@newspeer2.tds.net>

Steven D'Aprano wrote:
> On Wed, 15 Feb 2006 08:44:10 +0100, Marc 'BlackJack' Rintsch wrote:

>>``if not b in m`` looks at each element of `m` until it finds `b` in it
>>and stops then.  Assuming `b` is in `m`, otherwise all elements of `m` are
>>"touched".
>>
>>``if m.count(b) > 0`` will always goes through all elements of `m` in the
>>`count()` method.
> 
> 
> But the first technique executes in (relatively slow) pure Python, while
> the count method executes (relatively fast) C code. So even though count
> may do more work, it may do it faster.

'a in b' actually takes fewer bytecodes because 'in' has it's own 
bytecode but b.count requires an attribute lookup:

  >>> import dis
  >>> def foo():
  ...   a in b
  ...
  >>> def bar():
  ...   b.count(a)
  ...
   >>> dis.dis(foo)
   2           0 LOAD_GLOBAL              0 (a)
               3 LOAD_GLOBAL              1 (b)
               6 COMPARE_OP               6 (in)
               9 POP_TOP
              10 LOAD_CONST               0 (None)
              13 RETURN_VALUE
  >>> dis.dis(bar)
   2           0 LOAD_GLOBAL              0 (b)
               3 LOAD_ATTR                1 (count)
               6 LOAD_GLOBAL              2 (a)
               9 CALL_FUNCTION            1
              12 POP_TOP
              13 LOAD_CONST               0 (None)
              16 RETURN_VALUE

Not much difference in speed when the item is not in the list, a slight 
edge to 'a in b' for a large list:

D:\>python -m timeit -s "lst = range(1000)" "1001 in lst"
10000 loops, best of 3: 55.5 usec per loop

D:\>python -m timeit -s "lst = range(1000)" "lst.count(1001) > 1"
10000 loops, best of 3: 55.5 usec per loop

D:\>python -m timeit -s "lst = range(1000000)" "lst.count(-1) > 1"
10 loops, best of 3: 62.2 msec per loop

D:\>python -m timeit -s "lst = range(1000000)" "(-1) in lst"
10 loops, best of 3: 60.8 msec per loop

Of course if the item appears in the list, 'a in b' has a huge advantage:

D:\>python -m timeit -s "lst = range(1000000)" "(1) in lst"
10000000 loops, best of 3: 0.171 usec per loop

Kent


From alexandre.fayolle at logilab.fr  Wed Feb 15 07:36:44 2006
From: alexandre.fayolle at logilab.fr (Alexandre Fayolle)
Date: Wed, 15 Feb 2006 13:36:44 +0100
Subject: [ANN] pyqonsole-0.2.0
Message-ID: <20060215123644.GM12419@logilab.fr>

Logilab has released pyqonsole-0.2.0

Pyqonsole is a X Window terminal written in Python. The code is based
on konsole, and it uses the Qt toolkit. It is mainly meant for use by
Python application developpers who would like to embed a terminal in
their application, but it can be used as a not blazingly fast XTerm
replacement.

Download: http://www.logilab.org/projects/pyqonsole
Mailing List: http://www.logilab.org/mailinglists/python_projects

-- 
Alexandre Fayolle                              LOGILAB, Paris (France).
http://www.logilab.com   http://www.logilab.fr  http://www.logilab.org
Retrait du projet de loi DADVSI: http://eucd.info/petitions/index.php?petition=2
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From KennethGorelick at gmail.com  Sun Feb 19 17:36:46 2006
From: KennethGorelick at gmail.com (KennethGorelick)
Date: 19 Feb 2006 14:36:46 -0800
Subject: Countdown Timer
In-Reply-To: <1140380858.958124.68200@g47g2000cwa.googlegroups.com>
References: <1140378968.362832.250720@g47g2000cwa.googlegroups.com>
	<1140380858.958124.68200@g47g2000cwa.googlegroups.com>
Message-ID: <1140388606.316732.133770@o13g2000cwo.googlegroups.com>

Thank you!



From gene.tani at gmail.com  Thu Feb 23 09:44:36 2006
From: gene.tani at gmail.com (gene tani)
Date: 23 Feb 2006 06:44:36 -0800
Subject: regular expresson for Unix and Dos Lineendings wanted
In-Reply-To: <1140703941.270934.63050@f14g2000cwb.googlegroups.com>
References: <jterv157550g4qd4rosc3a2o8l69gcau8v@4ax.com>
	<1140703941.270934.63050@f14g2000cwb.googlegroups.com>
Message-ID: <1140705876.531175.240600@z34g2000cwc.googlegroups.com>


gene tani wrote:
> Franz Steinhaeusler wrote:
> >
> > Who can help me (regular expression, which works for both cases).
>
> universal newlines:
> http://www.python.org/doc/2.3.3/whatsnew/node7.html
> http://mail.python.org/pipermail/python-list/2006-February/324410.html

if multiple end-of line markers are present (\r, \r\n and or \n), use
the file's newlines attribute to see what they are.  I think the thread
linked above touched on that.  Otherwise newlines (or os.linesep)
should tell you what end of line is in that file.

http://docs.python.org/lib/bltin-file-objects.html



From n.estner at gmx.de  Sat Feb  4 09:37:46 2006
From: n.estner at gmx.de (n.estner at gmx.de)
Date: 4 Feb 2006 06:37:46 -0800
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<donn-C3B8DF.14535302022006@gnus01.u.washington.edu>
	<1138926741.052843.169270@z14g2000cwz.googlegroups.com>
	<donn-AC8404.17325802022006@gnus01.u.washington.edu>
	<1138965780.698016.95590@o13g2000cwo.googlegroups.com>
	<donn-442117.10474803022006@gnus01.u.washington.edu>
	<1139010489.553408.250770@g44g2000cwa.googlegroups.com>
	<1139035840.23704@jetspin.drizzle.com>
Message-ID: <1139063866.255586.111690@g47g2000cwa.googlegroups.com>

Donn Cave wrote:

> Quoth n.estner at gmx.de:
> | > Still see no problem.  Of course, it goes without saying that
> | > Python 2.4 doesn't work this way, but given that it's theoretically
> | > possible for f(a) to be resolved similarly to a.f, then I really
> | > do not see what you're seeing here.  The kwargs parameter appears
> | > irrelevant from where I'm sitting.
> |
> | Then either you didn't understand my answers, or I didn't understand
> | your idea. Could you summarize how exactly "f(x,y=z)" should be
> | resolved, i.e. where it should look for "f"?
>
> a.f ==> f(a)

So, if the compiler recognizes the tokens "a.f", it should treat them
as if it found the tokens "f(a)". But that wouldn't do what you want.
You want it to do something different if it found the tokens "f(a)".

> I would agree that I didn't understand your answers, but they weren't
> really answers so much as questions, along the lines of ``well then,
> how would this work?''  I seem to have missed what you were driving at,
> but maybe if you were to just came out and explain the point?

You do know what a rethorical question is?

The first point is: Python has global functions, as well as methods. If
f(a) should look up f inside a first, that would shadow any global or
local f. That's bad, because python is dynamically typed, and you
sometimes down' know what "a" is. Things like "open(filename)" or
"tuple(a,b,c)" could behave completely unexpected, if "filename" had an
"open" or "a" a "tuple" attribute.

The other point is: Python supports named arguments. The algorithm to
put positional and named arguments into the right parameters is rather
tricky, and it _must_ know the function that's being called to work.
So, you simply can't make function lookup depend on the parameters,
it's a hen-egg problem.

> Of course the whole business is kind of a joke, since there is no way
> anyone in their right mind would wish to change Python's notation for
> such trivial reasons, but there actually are languages that resolve
> functions based on argument types.  Overloading in C++ is somewhat
> like this, Haskell's typeclass mechanism, and there is a ``multiple
> dispatch'' model that I have no experience with but is not without its
> supporters.

Yes, but both C++ and Haskell are statically typed, and neither
supports named arguments.
(We're talking about one function operating on one object, so I don't
see what multiple dispatch has to do with this)



From franz.steinhaeusler at gmx.at  Mon Feb 27 08:53:08 2006
From: franz.steinhaeusler at gmx.at (Franz Steinhaeusler)
Date: Mon, 27 Feb 2006 14:53:08 +0100
Subject: wxPython: help(wx) causes segfaulting?
References: <mailman.2457.1140992731.27775.python-list@python.org>
	<usi502h2ltmbvt7e58blv4hhsitseg565u@4ax.com>
	<1141044915.517203.16390@i40g2000cwc.googlegroups.com>
Message-ID: <kq06029b0pt9299labschhvp8asp048id1@4ax.com>

On 27 Feb 2006 04:55:15 -0800, "Andr?" <andre.roberge at gmail.com> wrote:

>
>Franz Steinhaeusler wrote:
>> On Sun, 26 Feb 2006 10:35:13 -0600, Tim Chase
>> <python.list at tim.thechases.com> wrote:
>>
>> >Trying to get my feet wet with wxPython (moving from just
>> >command-line apps), I tried the obvious (or, at least to me
>> >was obvious):
>> >
>> >Start python, "import wx" and then do a "help(wx)" to see
>> >what it can tell me.
>>
>> I tried it on Windows Xp, and I got also a traceback:
>>
>> >>> help (wx)
>> Traceback (most recent call last):
>[snip]
>
>I don't seem to have any problem (except that it takes a while to load)
>
>C:\Documents and Settings\Andr?>python
>ActivePython 2.4.2 Build 248 (ActiveState Corp.) based on
>Python 2.4.2 (#67, Oct 30 2005, 16:11:18) [MSC v.1310 32 bit (Intel)]
>on win32

C:\Python24\Lib\site-packages\wx-2.621-msw-ansi>python
ActivePython 2.4 Build 244 (ActiveState Corp.) based on
Python 2.4 (#60, Feb  9 2005, 19:03:27) [MSC v.1310 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.

maybe you have 2.4.2 and I 2.4.
-- 
Franz Steinhaeusler


From peter.maas at somewhere.com  Mon Feb 13 16:30:43 2006
From: peter.maas at somewhere.com (Peter Maas)
Date: Mon, 13 Feb 2006 22:30:43 +0100
Subject: how do you pronounce 'tuple'?
In-Reply-To: <Wj6If.1606$No6.38150@news.tufts.edu>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
	<mailman.1857.1139863723.27775.python-list@python.org>
	<Wj6If.1606$No6.38150@news.tufts.edu>
Message-ID: <dsqtq7$mju$1@online.de>

John Salerno schrieb:
> Terry Hancock wrote:
> 
>> So what's a 1-element tuple, anyway? A "mople"?  "monople"?
>> It does seem like this lopsided pythonic creature (1,) ought
>> to have a name to reflect its ugly, newbie-unfriendly
>> nature.
>>
>> Are we having fun yet? ;-)
> 
> I kind of like 'moople'.  :)

tuples are of latin origin, so one can derive the tuple words
systematically:

Latin             n-tuple
---------------------------
...               ...
triplex           triple
duplex            duple
simplex           simple

I wouldn't mind calling (1,) a simple but I'm not a native English
speaker so I have no idea wether it sounds ridiculous to English
ears. If simple is too simple for you just call it simplum or simplon
or simplex.

;)

Peter Maas, Aachen


From http  Fri Feb 24 03:08:13 2006
From: http (Paul Rubin)
Date: 24 Feb 2006 00:08:13 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<pan.2006.02.19.08.00.50.166399@REMOVETHIScyber.com.au>
	<7xk6bp4k90.fsf@ruckus.brouhaha.com>
	<1140722854.552409.48280@j33g2000cwa.googlegroups.com>
Message-ID: <7xu0apyyaa.fsf@ruckus.brouhaha.com>

dlp at itasoftware.com writes:
> But Lisp isn't dynamically typed "exactly the way Python is".
> Python documents ways to manipulate the internals of objects at
> runtime.  It is possible to add, change or delete methods and slots
> by directly changing the hashtable they're stored in.  While CLOS
> does permit a certain amount of runtime redefinition, it is not as
> completely free wheeling and unpredicatable.

Although CLOS is now part of the Lisp standard I haven't generally
thought of it as describing the language semantics.  It's more like a
library routine.  Python's standard library generally doesn't provide
documented ways of mucking around with the internal structure of
library classes.  CLOS (or something close to it) similarly can and
has been implemented as a Lisp macro package independent from the rest
of the Lisp system.


From roy at panix.com  Thu Feb 23 07:32:21 2006
From: roy at panix.com (Roy Smith)
Date: Thu, 23 Feb 2006 07:32:21 -0500
Subject: except clause not catching IndexError
References: <dti4d8$lmn$1@mailhub227.itcs.purdue.edu>
	<8764n7dzl5.fsf@andreasen.org>
	<43FD59F7.5070302@REMOVEMEcyber.com.au>
Message-ID: <roy-B6E1BD.07322123022006@reader2.panix.com>

Steven D'Aprano <steve at REMOVEMEcyber.com.au> wrote:
> And here I was thinking that commas make tuples, not 
> brackets. What is happening here?

What is happening is that the syntax for forming tuples is one of Python's 
warts.  Sometimes the comma is what makes a tuple:

>>> a = 1, 2
>>> type (a)
<type 'tuple'>

Sometimes, it is the parens:

>>> b = ()
>>> type (b)
<type 'tuple'>

Sometimes the syntax is ambiguous and you need both.  This happens anytime 
you have a list of comma separated things, such as in the arguments to a 
function:

a = foo (1, 2)       # two integer arguments
b = foo ((a, 2))     # one tuple argument

The except clause of a try statement is one of those times.


From bblais at bryant.edu  Sat Feb 18 10:38:45 2006
From: bblais at bryant.edu (Brian Blais)
Date: Sat, 18 Feb 2006 10:38:45 -0500
Subject: strange error I can't figure out...
In-Reply-To: <nrSdnRNFGZDBvWrenZ2dnUVZ_v2dnZ2d@comcast.com>
References: <mailman.2093.1140267254.27775.python-list@python.org>
	<nrSdnRNFGZDBvWrenZ2dnUVZ_v2dnZ2d@comcast.com>
Message-ID: <43F73F85.2050106@bryant.edu>

John Zenger wrote:
> It works fine for me.  You must be having an indentation problem.
> 
> Also, get rid of the comma at the end of that last print statement.
> 
> Brian Blais wrote:
>> Hello,
>>
>> I have an odd kind of Heisenbug in what looks like a pretty simple 
>>
>> If you uncomment the one print statement I added in the progressBar 
>> class, you get the error:

talk about a Heisenbug...it disappeared after reading this post...without changing 
anything.  :)

It reminds me of the many times that IT problems disappear then the tech looks at it.


		thanks,


			bb

-- 
-----------------

             bblais at bryant.edu
             http://web.bryant.edu/~bblais


From frank at niessink.com  Wed Feb 22 17:42:37 2006
From: frank at niessink.com (Frank Niessink)
Date: Wed, 22 Feb 2006 23:42:37 +0100
Subject: ConfigParser and unicode: a simple solution?
Message-ID: <43FCE8DD.5060303@niessink.com>

Dear list members,

I'm using ConfigParser to read and write simple configuration files. One 
of the items written is the file the user is currently working on, so 
that the application can load that same file when the user starts the 
application for a new session.

However, filenames may not be simple ascii strings, but can very well be 
  unicode strings. Would a simple solution to store the filename in the 
.ini file be to encode it with 'unicode_escape' before calling 
configparse.set(section, setting, filename)? For example:

settings = SafeConfigParser(...)
encoded_filename = filename.encode('unicode_escape')
settings.set('file', 'currentfilename', encoded_filename)

And of course doing the reverse when getting the filename:

settings = SafeConfigParser(...)
encoded_filename = settings.get('file', 'currentfilename')
filename = filename.decode('unicode_escape')

Would this work? Any caveats?

Thanks, Frank

PS: I'm aware of a bunch of alternatives to ConfigParsers, so if the 
above solution is not feasible, I'll probably have to incorporate one of 
these alternatives in my app.


From dstark7 at gmail.com  Sun Feb 12 09:01:55 2006
From: dstark7 at gmail.com (dmsbox2000-list1@yahoo.com)
Date: 12 Feb 2006 06:01:55 -0800
Subject: Tracking down memory leaks?
In-Reply-To: <1139749861.949765.282310@z14g2000cwz.googlegroups.com>
References: <1139749861.949765.282310@z14g2000cwz.googlegroups.com>
Message-ID: <1139752915.618372.325450@o13g2000cwo.googlegroups.com>

I *think* Python uses reference counting for garbage collection.  I've
heard talk of people wanting to change this (to mark and sweep?).
Anyway, Python stores a counter with each object.  Everytime you make a
reference to an object this counter is increased.  Everytime a pointer
to the object is deleteted or reassigned the counter is decreased.
When the counter reaches zero the object is freed from memory.  A flaw
with this algorithm is that if you create a circular reference the
object will never be freed.  A linked list where the tail points to the
head will have a reference count of 1 for each node, after the head
pointer is deleted.  So the list is never freed.  Make sure you are not
creating a circular reference.  Something like this:

a = [1, 2, 3, 4, 5, 6]
b = ['a', 'b', 'c', 'd']
c = [10, 20, 30, 40]

a[3] = b
b[1] = c
c[0] = a

the last assignment creates a circular refence, and until it is
removed, non of these objects will be removed from memory.

I'm not an expert on python internals, and it is possible that they
have a way of checking for cases like this.   I think the deepcopy
method catches this, but I don't *think* basic garbage collection look
for this sort of thing.

David



From exarkun at divmod.com  Sat Feb 18 10:11:36 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Sat, 18 Feb 2006 10:11:36 -0500
Subject: Multi-threaded SSL
In-Reply-To: <1140248242.148101.87280@f14g2000cwb.googlegroups.com>
Message-ID: <20060218151136.6122.646155973.divmod.quotient.2100@ohm>

On 17 Feb 2006 23:37:22 -0800, cowbertvonmoo at gmail.com wrote:
>Thanks Alex.  I hadn't noticed that example.  I gave it a shot and
>still have the synchronization problems.  While this may be because of
>a lack of understanding of twisted threads (again, perhaps I'm just not
>looking in the right places, but even the the API reference is sparse
>of explanation), I strongly suspect that there's something going on at
>a lower level, like the Open SSL wrapper or Open SSL on the system
>level.

You probably couldn't find an explanation of Twisted threads due to the fact that Twisted is implemented almost exclusively without using threads at all.  Aside from the large library of protocol implementations, this is one of its main selling points. ;)

>At this point, I'd just like to know if I should cut my losses
>and try a very rapid polling solution (*cringes*).  Here are my
>attempts:
>
>Twisted SSL Foray:
>http://cixar.com/svn/mage/twisted_ssl_foray.py
>http://cixar.com/websvn/filedetails.php?repname=Cixar&path=%2Fmage%2Ftwisted_ssl_foray.py&rev=0&sc=0

After reading my comment above, hopefully it is clear what is awry in this code.  You cannot use sleep() in a Twisted application and expect anything to work well.  Instead, a scheduling primitive is provided, reactor.callLater(delay, function[, *a[, **kw]]).

However, rather than using the low-level APIs of twisted.web directly, you may be interested in using an implementation of this idea which already exists.  Take a look at <http://divmod.org/trac/wiki/DivmodNevow/Athena>.  The tutorial builds up a web page which does something very like what your code seems to be attempting.

If you pursue the Twisted version, keep in mind the web-dedicated Twisted mailing list you can use as a resource: <http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-web>.

Jean-Paul


From darkpaladin79 at gmail.com  Sun Feb  5 11:28:15 2006
From: darkpaladin79 at gmail.com (Ivan Shevanski)
Date: Sun, 5 Feb 2006 11:28:15 -0500
Subject: Learning Python
In-Reply-To: <17d4ae400602050826y65fd1021sa5fcd5ba33215ba2@mail.gmail.com>
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
	<ds588v$6s4$02$1@news.t-online.com>
	<17d4ae400602050826w4aa691f6r75484768af31233e@mail.gmail.com>
	<17d4ae400602050826y65fd1021sa5fcd5ba33215ba2@mail.gmail.com>
Message-ID: <17d4ae400602050828qeb7b00fx7d5a5fae19288ab5@mail.gmail.com>

On 2/5/06, Ivan Shevanski <darkpaladin79 at gmail.com> wrote:
>
>
>
> On 2/5/06, Ivan Shevanski <darkpaladin79 at gmail.com> wrote:
> >
> >
> >
> > On 2/5/06, Florian Nykrin <fn-mail at t-online.de > wrote:
> > >
> > > Hi Byte!
> > >
> > > Your code should look like this:
> > >
> > > x = raw_input('Please enter your name: ')
> > > if x == 'myself': print 'OK'
> > >
> > > Because myself should be a string and not a variable name, you have to
> > > put it in quotes.
> > >
> > > Regards, Florian.
> > > --
> > > http://mail.python.org/mailman/listinfo/python-list
> > >
> >
> >
> >
> > --
> >
> >
>
> Oh, I was under the impression that myself is a variable name. . .Who
> would type in myself as their name? If it is a variable it's fine how it
> is, but if it is a string put it in quotes.
>
>
>
> -Ivan
>

Ugh sorry read it wrong, thats right.

--



-Ivan
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From yong at net.tamu.edu  Wed Feb  1 11:36:26 2006
From: yong at net.tamu.edu (Yong Wang)
Date: Wed, 1 Feb 2006 10:36:26 -0600 (CST)
Subject: python printout format
Message-ID: <20060201163626.ABFA21589B@net.tamu.edu>

Hi,
   I have a data set like row = [[1,2,3,4,5], [6,7,8,9,10], [11,12,13,14,15]]
   when I use loop to print out data, I got compile error in printout statment.
   while j<24:
       print ' ',string.ljust(str(units[0]), 5),
       print ' ',string.ljust(str(ports[j], 3),
       print ' ',string.ljust(PortlinkbeatInv[row[j][0]],14),
       print ' ',string.ljust(PortStatusInv[row[j][1]], 19),
       print ' ',string.ljust(PortTestResultInv[row[j][2]],17),
       print ' ',string.ljust(PortVisualInv[row[j][3]],19),
       print ' ',string.ljust(PortAddrVioInv[row[j][4]],15)
       j=j+1
    misc.doPg('Port status listing on ' + tag + ' (Page %d):',
                      vals,doBanner,doRow)

   Error messages are:
python -c "import compileall; compileall.compile_dir('.',0)"
Listing . ...
Compiling ./Ciscoports.py ...
  File "./Ciscoports.py", line 753
    print string.ljust(PortlinkbeatInv[row[j][0]],14),
        ^
SyntaxError: invalid syntax


   How should I change to printout row data [1,2,3,4,5] in one row in assigned format?
   Many thanks,

    Yong



From kent at kentsjohnson.com  Fri Feb 24 06:45:41 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Fri, 24 Feb 2006 06:45:41 -0500
Subject: A C-like if statement
In-Reply-To: <pan.2006.02.24.09.58.32.497698@REMOVETHIScyber.com.au>
References: <hp-dnY20cusOnGPeRVn-rg@nmt.edu> <dtl04p$5q2$1@reader2.panix.com>
	<sdadnS6nfNnbmmPeRVn-sw@nmt.edu>
	<pan.2006.02.23.22.14.53.56541@REMOVETHIScyber.com.au>
	<1140742149.011750.321530@z34g2000cwc.googlegroups.com>
	<pan.2006.02.24.09.58.32.497698@REMOVETHIScyber.com.au>
Message-ID: <43feed58_3@newspeer2.tds.net>

Steven D'Aprano wrote:
> Now that's a Python wart: using >>> for the prompt for interactive
> sessions. It makes it ambiguous when posting code in email or newsgroups,
> especially once the code gets quoted a few times.

So change it. My pythonstartup.py contains:

import sys
sys.ps1 = ' >>> '
sys.ps2 = ' ... '

Kent


From luca.bs at gmail.com  Wed Feb 22 08:12:35 2006
From: luca.bs at gmail.com (LB)
Date: 22 Feb 2006 05:12:35 -0800
Subject: odt -> pdf
In-Reply-To: <OwOKf.1845$XZ3.160163@news20.bellglobal.com>
References: <mailman.2222.1140519805.27775.python-list@python.org>
	<OwOKf.1845$XZ3.160163@news20.bellglobal.com>
Message-ID: <1140613955.622275.194160@g43g2000cwa.googlegroups.com>

pyUNO ia a bridge between python and Openoffice.org. Nothing directly
to do with export in pdf format. If you prefer you can "print" a pdf
file from a.odt or .doc or .* source with external freeware/shareware
or business utilities as pdf creator, adobe acrobat etc. sometimes with
more control on results.

LB



From Jeff.Quandt at bhmi.com  Tue Feb 28 15:44:00 2006
From: Jeff.Quandt at bhmi.com (Jeff Quandt)
Date: Tue, 28 Feb 2006 14:44:00 -0600
Subject: Long running Script stops responding, CPU usage increases
Message-ID: <FE541E59EAD94E4793CAD0C03DB01AEC886EC3@clavin.whq.bhmi.com>

This is running Python 2.3 on windows 2003/windows xp.

I have written a script to display and filter the Win32 event log in a scrolling list to the command line (it also does some summary tasks).  It uses the win32evtlog.ReadEventLog to seek or scan the event log based on filter parameters.  It is supposed to run until the user kills it, so there are repeated calls to ReadEventLog.  

The problem is that after the script has run from some time (usually several hours), the call to ReadEventLog seems to hang and the CPU usage increases dramatically (from nil to 30-50%).  The script does not exit this stage, and has to be broken manually with Ctrl-C.  I've tried closing and reopening the event log handle after it has been open for an hour.  I've added explicit calls to the garbage collector.  Neither helped at all.

I realize that this is an API call, so it may not be a python issue.  But I have seen this type of behavior on other scripts (not event loggers), but they were test/debug tools and weren't important enough to track down the issue.

Any help would be appreciated.

code example:

    def OpenLog( self ):
        #
        #open event log
        #
        self.mHandle              = win32evtlog.OpenEventLog( self.mComputer
                                                            , self.mLogType
                                                            )
        if not self.mHandle:
            raise ValueError, "invalid handle"

        self.mLogOpenTmst = time.time()

    def CloseLog( self ):

        win32evtlog.CloseEventLog( self.mHandle     )

    def ReadLog( self ):

	self.mFlags = win32evtlog.EVENTLOG_FORWARDS_READ|win32evtlog.EVENTLOG_SEEK_READ
            vEventScon  = win32evtlog.ReadEventLog( self.mHandle
                                                  , self.mFlags
                                                  , self.mLogOffset
                                                  )
            #
            # if not found, try again in 5 seconds
            #
            if not vEventScon:

                #
                # If we've had the log open for more than 1 hour, dump it and reopen
                #
                if ( time.time() > (self.mLogOpenTmst + 3600) ):
                    self.CloseLog()
                    self.OpenLog()

                time.sleep( 5 )
                return bOk

	#
	# snip...
	# manipulate event records here
	#

#
# main
#
OpenLog
Ok = 1
while Ok:
	Ok = ReadLog()
CloseLog()


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From uval at rz.uni-karlsruhe.de  Fri Feb 10 17:38:23 2006
From: uval at rz.uni-karlsruhe.de (=?ISO-8859-1?Q?Sch=FCle_Daniel?=)
Date: Fri, 10 Feb 2006 23:38:23 +0100
Subject: is there a better way?
In-Reply-To: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
Message-ID: <dsiqh5$ckb$1@news2.rz.uni-karlsruhe.de>

[...]

> I have been using something like this:
> _____________________
> 
> while list[0] != O:
>     storage.append(list[0])
>     list.pop(0)
>     if len(list) == 0:
>         break
> _____________________
> 
> But this seems ugly to me, and using "while" give me the heebies.  Is
> there a better approach?

 >>> lst = [1,2,3,4,5,0,0,0,0]
 >>> del lst[lst.index(0):]
 >>> lst
[1, 2, 3, 4, 5]
 >>>

Regards, Daniel



From kent at kentsjohnson.com  Sat Feb 25 09:20:46 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Sat, 25 Feb 2006 09:20:46 -0500
Subject: Playing with modules
In-Reply-To: <1140832372.203415.203090@p10g2000cwp.googlegroups.com>
References: <1140808435.311458.86770@z34g2000cwc.googlegroups.com>
	<1140826926.993654.188640@j33g2000cwa.googlegroups.com>
	<1140832372.203415.203090@p10g2000cwp.googlegroups.com>
Message-ID: <4400632c_1@newspeer2.tds.net>

jjcassidy at gmail.com wrote:
>>You're going to have to create the home.base module somewhere. If you
>>want to put in that some code that basically imports another module's
>>namespace into the home.base module's namespace, then that may do what
>>you want.
> 
> 
> Thanks, Jonathon, but I think I've tried what you are saying. I've
> tried doing this a couple different ways.

What did you try? You should be able to write home/__init__.py to import 
whatever parts of cassidy.blah... you like and define the name base to 
be a reference to some part of cassidy.

> 
> But I was wondering whether I could fool or "backend" the normal import
> mechanism. Even in Java, I can write my own class loader which can
> quick compile Java snippets and load the anonymous byte code.

See http://www.python.org/doc/2.3/whatsnew/section-pep302.html

Kent


From python.list at tim.thechases.com  Thu Feb  9 12:10:09 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 09 Feb 2006 11:10:09 -0600
Subject: newbie needs serious help
In-Reply-To: <8BE025E130DD4544918A767F414D260F02C80767@ttmail01.techni-tool.com>
References: <8BE025E130DD4544918A767F414D260F02C80767@ttmail01.techni-tool.com>
Message-ID: <43EB7771.1070509@tim.thechases.com>

> I downloaded the Python 2.4.2 msi file, and installed it. 
> All went well. Now, I have no idea what to do.
> I read the documentation, README files, etc., and it looks like I'm
> supposed to configure it with a ./configure command,and then a magical
> make command.

I suspect you were reading installation instructions for multiple 
OS platforms.  The "./configure; make" song-and-dance is a common 
way to do an install on *nix platforms.  I suspect that all you 
needed to do on Win32 was to run the MSI file and you're good to go.

I don't know about the Google Sitemap side of things, but I 
suspect you've already successfully installed Python.

-tkc


(PS:  You wouldn't happen to have attended Messiah College...I 
knew a Joy Hunsberger who attended there and wondered if you're 
the self-same person.  Otherwise, feel free to disregard this PS :)









From roman.yakovenko at gmail.com  Sun Feb  5 01:08:19 2006
From: roman.yakovenko at gmail.com (Roman Yakovenko)
Date: Sun, 5 Feb 2006 08:08:19 +0200
Subject: Embedding Python into C/C++ applications
In-Reply-To: <43e35299$0$5001$db0fefd9@news.zen.co.uk>
References: <43e35299$0$5001$db0fefd9@news.zen.co.uk>
Message-ID: <7465b6170602042208kf43d1dbs79a3394c3d1939ff@mail.gmail.com>

On 2/3/06, John Dean <john at totalrekall.co.uk> wrote:
> Hi
>
> Could somebody, please tell me where I can find information about embedding
> Python into a C/C++ application. The example in the docs is rather simple. I
> am looking for something a bit more complex and longer

For my opinion: Boost.Python is the way to go:

http://boost.org/libs/python/doc/tutorial/doc/html/python/embedding.html

There is also an other project:

http://cxx.sourceforge.net/PyCXX.html

> --
> Best Regards
> John
> --
> http://mail.python.org/mailman/listinfo/python-list
>

--
Roman Yakovenko
C++ Python language binding
http://www.language-binding.net/


From Jeremiah.Rushton at gmail.com  Thu Feb  9 17:12:45 2006
From: Jeremiah.Rushton at gmail.com (Jeremiah)
Date: 9 Feb 2006 14:12:45 -0800
Subject: pythonic exec* spawn*
In-Reply-To: <1139522850.559814.25190@g43g2000cwa.googlegroups.com>
References: <mailman.1686.1139521339.27775.python-list@python.org>
	<1139522850.559814.25190@g43g2000cwa.googlegroups.com>
Message-ID: <1139523165.185747.117870@z14g2000cwz.googlegroups.com>

you can use the threads commands



From sam at nuevageorgia.com  Mon Feb 27 23:46:43 2006
From: sam at nuevageorgia.com (SamFeltus)
Date: 27 Feb 2006 20:46:43 -0800
Subject: Python and Flash
In-Reply-To: <1141101898.725832.104260@e56g2000cwe.googlegroups.com>
References: <1139230361.675896.241920@z14g2000cwz.googlegroups.com>
	<1139235297.903689.244030@z14g2000cwz.googlegroups.com>
	<1139407620.948877.5820@g14g2000cwa.googlegroups.com>
	<1141101898.725832.104260@e56g2000cwe.googlegroups.com>
Message-ID: <1141102003.562082.298250@z34g2000cwc.googlegroups.com>

PS.  Here is an example...

http://sonomasunshine.com/sonomasunshine/FrontPage.html



From scott.daniels at acm.org  Wed Feb 22 17:10:02 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Wed, 22 Feb 2006 14:10:02 -0800
Subject: Question about struct.unpack
In-Reply-To: <m23bibxhvu.fsf@titine.jacoboni.fr>
References: <m2bqwzxywv.fsf@titine.jacoboni.fr> <43fc9c67$1@nntp0.pdx.net>
	<m23bibxhvu.fsf@titine.jacoboni.fr>
Message-ID: <43fcdfa0$1@nntp0.pdx.net>

Eric Jacoboni wrote:
> But :
>>     nom = nomz.rstrip('\0')
> 
> doesn't work for me:
> 
>>>> nomz
> 'Dupont\x00\x80\xbf\xff\xf70\x8f\xe0u\xa4\x00\x00.8\xfe\xfe\xfe\xff\x80\x80\x80\x80'
> 
>>>> nom = nomz.rstrip('\0')
>>>> nom
> 'Dupont\x00\x80\xbf\xff\xf70\x8f\xe0u\xa4\x00\x00.8\xfe\xfe\xfe\xff\x80\x80\x80\x80'

Sorry, I thought you had NUL-filled data.
For NUL terminated data:
     nom = nomz[: nomz.index('\0')]

--Scott David Daniels
scott.daniels at acm.org


From samslists at gmail.com  Mon Feb 20 23:21:43 2006
From: samslists at gmail.com (Sam's Lists)
Date: Tue, 21 Feb 2006 01:21:43 -0300
Subject: Writing my own typing monitor program for RSI sufferers...
In-Reply-To: <17402.37025.170658.197027@montanaro.dyndns.org>
References: <1140491147.433293.164700@g43g2000cwa.googlegroups.com>
	<17402.37025.170658.197027@montanaro.dyndns.org>
Message-ID: <558124520602202021x203786b5u552f20b0186e7b05@mail.gmail.com>

Skip...

So, so close....  The problem with this implementation is that it doesn't
monitor usb keyboards under linux at all as far as I can tell....since no
keyboard entry will show up in /proc/interrupts with a usb keyboard.  I
absolutely need the keyboard monitoring as well.

Otherwise, your project would be the perfect starting point for me!

Anyone else have an idea as to what I can use with Python to know when the
keyboard is being used even when I don't have focus?

Thanks
Sam

On 2/21/06, skip at pobox.com <skip at pobox.com> wrote:
>
>     >> I want to write a program that will let me know after thirty
> minutes
>     >> of typing that I need to take a five minute typing break.  But when
> I
>     >> stop typing it's smart enough to pause the 30 minute timer
>     >> automatically.  This is under the X-Window System (Linux).
>
> Take a look at
>
>     http://sourceforge.net/projects/watch/
>
> If you'd like to be added as a developer, let me know...
>
> Skip
>
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From peter at engcorp.com  Fri Feb 17 14:40:46 2006
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 17 Feb 2006 14:40:46 -0500
Subject: Which is faster? (if not b in m) or (if m.count(b) > 0)
In-Reply-To: <1140192708.160844.138890@g14g2000cwa.googlegroups.com>
References: <mailman.1988.1140064009.27775.python-list@python.org>
	<1140192708.160844.138890@g14g2000cwa.googlegroups.com>
Message-ID: <dt58s0$44s$1@sea.gmane.org>

Farel wrote:
> Tim, Are you saying that:
>      not (b in m)
> is faster than:
>     b not in m
> ????

As Bruno tried to tell you, and I quote:

"""
Why don't you try by yourself ?
hint :
from timeit import Timer
help(Timer)
"""

Asking "which is faster" in comp.lang.python is the least efficient way 
of getting an answer, for everyone who reads the newsgroup, everyone who 
tries to help and, most importantly, for yourself.

-Peter



From jeremy+complangpython at jeremysanders.net  Fri Feb 10 12:59:35 2006
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Fri, 10 Feb 2006 17:59:35 +0000
Subject: is there a better way?
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
Message-ID: <dsika7$ise$1@gemini.csx.cam.ac.uk>

markscala at gmail.com wrote:

> You have a list of unknown length, such as this: list =
> [X,X,X,O,O,O,O].  You want to extract all and only the X's.  You know
> the X's are all up front and you know that the item after the last X is
> an O, or that the list ends with an X.  There are never O's between
> X's.

What not

for x in list:
  if x == O:
    break
  storage.append(x)

??

-- 
Jeremy Sanders
http://www.jeremysanders.net/


From bob.python at yahoo.com  Thu Feb 23 15:26:59 2006
From: bob.python at yahoo.com (Bob)
Date: 23 Feb 2006 12:26:59 -0800
Subject: How to move optparse from main to function?
In-Reply-To: <1140722037.144911.250900@g14g2000cwa.googlegroups.com>
References: <1140721179.096585.202560@g14g2000cwa.googlegroups.com>
	<1140722037.144911.250900@g14g2000cwa.googlegroups.com>
Message-ID: <1140726419.797594.252930@e56g2000cwe.googlegroups.com>

The module documentation helped me construct the meat of my code bu it
didn't lend a hand on how to build the real meal deal the way Jason's
explanation did.



From kay.schluehr at gmx.net  Sun Feb 26 15:39:36 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 26 Feb 2006 12:39:36 -0800
Subject: Tail Call Optimization as a Decorator
In-Reply-To: <1140981639.315995.34860@i39g2000cwa.googlegroups.com>
References: <1140981639.315995.34860@i39g2000cwa.googlegroups.com>
Message-ID: <1140986376.438905.95360@t39g2000cwt.googlegroups.com>


Crutcher wrote:
> This is fun :)
> {Note: I take no responsibilty for anyone who uses this in production
> code}
>
> #!/usr/bin/env python2.4
> # This program shows off a python decorator
> # which implements tail call optimization. It
> # does this by throwing an exception if it is
> # it's own grandparent, and catching such
> # exceptions to recall the stack.
>
> import sys
>
> class TailRecurseException:
>   def __init__(self, args, kwargs):
>     self.args = args
>     self.kwargs = kwargs
>
> def tail_call_optimized(g):
>   """
>   This function decorates a function with tail call
>   optimization. It does this by throwing an exception
>   if it is it's own grandparent, and catching such
>   exceptions to fake the tail call optimization.
>
>   This function fails if (and only if) the decorated
>   function recurses in a non-tail context.
>   """
>   def func(*args, **kwargs):
>     f = sys._getframe()
>     if f.f_back and f.f_back.f_back \
>         and f.f_back.f_back.f_code == f.f_code:
>       raise TailRecurseException(args, kwargs)
>     else:
>       while 1:
>         try:
>           return g(*args, **kwargs)
>         except TailRecurseException, e:
>           args = e.args
>           kwargs = e.kwargs
>   func.__doc__ = g.__doc__
>   return func
>
> @tail_call_optimized
> def factorial(n, acc=1):
>   "calculate a factorial"
>   if n == 0:
>     return acc
>   return factorial(n-1, n*acc)
>
> print factorial(10000)
> # prints a big, big number,
> # but doesn't hit the recursion limit.
>
> @tail_call_optimized
> def fib(i, current = 0, next = 1):
>   if i == 0:
>     return current
>   else:
>     return fib(i - 1, next, current + next)
>
> print fib(10000)
> # also prints a big number,
> # but doesn't hit the recursion limit.

Hey Crutcher, what a beautifull and elegant hack! Have you already
contributed it to the Python cookbook? 

Kay



From shreyasv at gmail.com  Wed Feb 22 15:27:21 2006
From: shreyasv at gmail.com (Shreyas)
Date: 22 Feb 2006 12:27:21 -0800
Subject: redirecting to a content page
References: <1140565482.106127.276650@z14g2000cwz.googlegroups.com>
	<43fc2446$0$30861$636a55ce@news.free.fr>
	<mailman.2308.1140638325.27775.python-list@python.org>
Message-ID: <1140640041.846866.87990@g43g2000cwa.googlegroups.com>

Thanks much, Location:  took care of what I needed.  I'll look to the
http protocols for the future.  

Shreyas



From xavier.morel at masklinn.net  Mon Feb 20 17:43:21 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Mon, 20 Feb 2006 23:43:21 +0100
Subject: Processing text using python
In-Reply-To: <mailman.2171.1140453999.27775.python-list@python.org>
References: <1140451760.998278.90430@g43g2000cwa.googlegroups.com>
	<mailman.2171.1140453999.27775.python-list@python.org>
Message-ID: <dtdgh2$aft$1@aphrodite.grec.isp.9tel.net>

Fredrik Lundh wrote:
> did you read the string chapter in the tutorial ?
> 
> http://docs.python.org/tut/node5.html#SECTION005120000000000000000
> 
> around the middle of that chapter, there's a section on slicing:
> 
>     "substrings can be specified with the slice notation: two indices
>     separated by a colon"
> 
Fredrik, how would you use slices to split a string by groups of 3 
characters?


From felipe.lessa at gmail.com  Tue Feb 28 17:09:20 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Tue, 28 Feb 2006 19:09:20 -0300
Subject: Make staticmethod objects callable?
In-Reply-To: <Ad2Nf.2695$RM2.303150@news20.bellglobal.com>
References: <Ad2Nf.2695$RM2.303150@news20.bellglobal.com>
Message-ID: <1141164560.10021.27.camel@kenshin>

Em Ter, 2006-02-28 ?s 15:17 -0500, Nicolas Fleury escreveu:
> class A:
>      @staticmethod
>      def foo(): pass
>      bar = foo()

# Why not:

def foo(): pass

class A:
	bar = foo()
	foo = staticmethod(foo)

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From LittlePython at lost.com  Wed Feb 15 19:22:18 2006
From: LittlePython at lost.com (LittlePython)
Date: Thu, 16 Feb 2006 00:22:18 GMT
Subject: How to cat None
References: <59xIf.16847$CZ4.13956@trnddc05>
	<1139975928.700808.210850@g47g2000cwa.googlegroups.com>
Message-ID: <_APIf.24618$3V4.8976@trnddc06>

Thx , I will give this a try.

<bonono at gmail.com> wrote in message
news:1139975928.700808.210850 at g47g2000cwa.googlegroups.com...
> Seems that what you want to do is to create a string in the form of :
>
> "55Init=Init\n55First=first\n55Last=Last\n55Alias=None"
>
> for each dictionary. If that is the case, may be you can try this :
>
> "\n".join("%s=%s" % x for x in user1.iteritems())
>
> Note that you cannot control the ordering of the keys when iterating a
> dict which may or may not be a concern for you.
>
> LittlePython wrote:
> > I found out the hard way that I can not cat None. I get an error. Is
there a
> > simple way to cat None without doing some kind of equation  ( if this
then
> > that). Is there a isNone() somewhere. I am not too sure I know what None
> > really means.
> >
> > I include an example to show what I am talking about in case I am
alittle
> > confused.
> >
> >
> >
> >
> > from easygui import *
> > import string
> >
> > msgbox('Starting Program')
> >
> > thisfile = fileopenbox(msg='Choose the correct File', title='Matrix
Input
> > File')
> > input = file(thisfile,'r')
> >
> > header = string.split(string.strip(input.readline()),',')
> > header.extend(['55FirstName',
> > '55Intial','55LastName','55Alias',])
> >
> > all = input.readlines()
> > input.close
> > input = None
> > matrix = {}
> > for user in all:
> >     user1 = string.split(string.strip(user),',')
> >     user1.extend(['None']*4)    <-------------------------I would like
to
> > None  or better NULL this instead of string it
> >     user1 = dict(zip(header,user1))
> >     matrix[user1['OldNTLogon']] = user1
> >
> > mychoice = choicebox(choices=matrix.keys())
> > user1 = matrix[mychoice]
> >
> > alltogether = ''
> >
> > for KeyName in user1.keys():
> >     if alltogether == '':
> >         alltogether = KeyName + '=' + '  ' + user1.get(KeyName) + '\n'
> >     else:
> >         alltogether = alltogether + KeyName + '=' + user1.get(KeyName) +
> > '\n'  <------- error 'can not cat None with a str' or something like
that
> >
> > msgbox(alltogether,'User Matrix for '+ mychoice )
> >
> > msgbox('The End')
>




From nephish at xit.net  Tue Feb  7 12:41:04 2006
From: nephish at xit.net (nephish at xit.net)
Date: 7 Feb 2006 09:41:04 -0800
Subject: in over my head ascii
In-Reply-To: <mailman.1557.1139333137.27775.python-list@python.org>
References: <1139245216.350356.272170@z14g2000cwz.googlegroups.com>
	<sk4fu1ljvt7h7d6euj7nq06e1e0ml8p8u5@4ax.com>
	<1139251420.501345.91850@g44g2000cwa.googlegroups.com>
	<1139256817.218319.160370@f14g2000cwb.googlegroups.com>
	<1139259694.603482.293660@g14g2000cwa.googlegroups.com>
	<1139260158.822523.308780@g47g2000cwa.googlegroups.com>
	<1139273414.645101.237780@z14g2000cwz.googlegroups.com>
	<1139289681.648488.7060@g43g2000cwa.googlegroups.com>
	<36mgu1dj9rqh3t8htppm41otgrgf70ob1t@4ax.com>
	<1139319079.318524.158460@f14g2000cwb.googlegroups.com>
	<1139326476.406060.63660@g43g2000cwa.googlegroups.com>
	<mailman.1557.1139333137.27775.python-list@python.org>
Message-ID: <1139334063.961457.275850@g43g2000cwa.googlegroups.com>

indeed i did not. thanks for the tip.



From tony.meyer at gmail.com  Wed Feb  1 03:54:01 2006
From: tony.meyer at gmail.com (Tony Meyer)
Date: Wed, 1 Feb 2006 21:54:01 +1300
Subject: python-dev Summary for 2006-01-01 through 2006-01-15
Message-ID: <6c63de570602010054w3a06fcfdpcf818b4441b5252b@mail.gmail.com>

[The HTML version of this Summary is available at
http://www.python.org/dev/summary/2006-01-01_2006-01-15.html]


=============
Announcements
=============

----------------------------
QOTF: Quote of the Fortnight
----------------------------

Guido, on the crashability of Python:

    I'm not saying it's uncrashable. I'm saying that if you crash it,
it's a bug unless proven harebrained.

Contributing thread:

- `Include ctypes into core Python?
<http://mail.python.org/pipermail/python-dev/2006-January/059621.html>`_

[SJB]

------------------------------------
Brett Cannon looking for Ph.D. ideas
------------------------------------

Brett Cannon is looking for Python-related ideas to form the subject
of his PhD dissertation, under Eric Wohlstadter at the University of
British Columbia.  He has three areas in which he has possible funding
(XML integration, game scripting support, and AOP); he is open to
grants from anyone else interested in particular Python development. 
If anyone has suggestions for topics, Brett is listening!

So far:

* Phillip J. Eby mentioned that he has been doing some research on
implementing a non-traditional form of AOP in Python.
* Bill Janssen suggested a system to compile Python to AJAX.
* Steve Holden suggested a Python learning system.
* Ian Bicking suggested Boxer_ implemented for Python.
* Armin Rigo suggested PyPy related work.
* Jason Orendorff suggested collecting a downloadable corpus of Python
source code, and performing various analyses on it.
* Dennis Allison suggested interpreter structures for Python-like
languages that do not use a global interpreter lock, as well as
various other topics.

 .. _Boxer: http://dewey.soe.berkeley.edu/boxer.html

Contributing thread:

 - `Ph.D. dissertation ideas?
<http://mail.python.org/pipermail/python-dev/2006-January/059702.html>`__

[TAM]

---------------------------------
2.4 Documentation with Commentary
---------------------------------

Ian Bicking put an instance_ of his commenting system, Commentary_, up
against the full 2.4 documentation. If you'd like to see how the
Python docs look with user-added comments, now's your chance!

.. _instance: http://pythonpaste.org/comment/python24/
.. _Commentary: http://pythonpaste.org/commentary/

Contributing thread:

 - `[Doc-SIG] that library reference, again
<http://mail.python.org/pipermail/python-dev/2006-January/059353.html>`__

[SJB]

---------------------------------------
Builds of the Development Documentation
---------------------------------------

Be sure to keep yourself up to date with the newest Python
documentation - Neal Norwitz has arranged it so that the current
Python development documentation is now automatically generated every
12 hours and placed at http://docs.python.org/dev/.

Contributing thread:

 - `automated builds and tests
<http://mail.python.org/pipermail/python-dev/2006-January/059362.html>`__

[SJB]

--------------------------------
PEPs now automatically installed
--------------------------------

Martin v. L?wis has arranged for an automatic installation of PEPs_:
they will now get published in the subversion post-commit.

Contributing thread:

 - `Installing PEPs
<http://mail.python.org/pipermail/python-dev/2006-January/059745.html>`__

 .. _PEPs: http://www.python.org/peps

[TAM]

=========
Summaries
=========

---------------------------------------------------
Using buildbot to automate testing of Python builds
---------------------------------------------------

A buildbot_ has been setup to facilitate `automated testing of the
Python SVN`_.  There are currently five slaves setup:

* Linux x86 (gentoo 2.6, glibc 2.3)
* Linux AMD64 (gentoo 2.6, glibc 2.3)
* Solaris10 sparc
* OS X 10.3 G5
* OS X 10.4 G4

Ideally, all supported platforms will be added (including OS, version,
hardware, and various configurations); the slaves are testing the
trunk and the 2.4 branch.  Note that Window buildbot slaves have to
have an appropriate compiler (MS VC 7.1), otherwise it can't compile
the code; the Windows Python would also like to build several other
packages (like bz2 and Tcl/Tk).  A periodic "clean build" may also be
added; there was discussion whether this should be done via a patch to
the buildbot master, via an IRC command, or with a separate scheduler.

Martin v. L?wis would rather buildbot produced static pages than act
as a web server (for security reasons).  Brian Warner explained that
it once did, but was changed to make it easier to implement features
like the "Force Build" button.  An explanation of the security was
given, and it seems satisfactory at the moment.

The buildbot testing has already produced results: a compiler warning
on OS X 10.3 was noticed.  A discussion took place as to whether this
should be fixed (it should) and who could do it (Ronald Oussoren
volunteered, with help from Skip Montanaro).

Fredrik Lundh had been playing with "automatic module discovery" in an
attempt to figure out how complete the library reference really is,
tracking down missing reference pages and generating stubs for pages
that "should exist".  He suggested that the buildbot could also run
this script; at the time of this summary this was in progress.

 .. _automated testing of the Python SVN: http://www.python.org/dev/buildbot/
 .. _buildbot: http://buildbot.sourceforge.net/

Contributing threads:

 - `buildbot <http://mail.python.org/pipermail/python-dev/2006-January/059359.html>`__
 - `Buildbot questions
<http://mail.python.org/pipermail/python-dev/2006-January/059429.html>`__
 - `[Buildbot-devel] Re: buildbot
<http://mail.python.org/pipermail/python-dev/2006-January/059455.html>`__
 - `Automated Python testing
<http://mail.python.org/pipermail/python-dev/2006-January/059460.html>`__
 - `building a module catalogue with buildbot
<http://mail.python.org/pipermail/python-dev/2006-January/059623.html>`__
 - `Buildbot: doing occasional full builds
<http://mail.python.org/pipermail/python-dev/2006-January/059643.html>`__

[TAM]

----------------------
A "Rejected Ideas" PEP
----------------------

Alexander Kozlovsky submitted a pre-PEP for the oft-repeated request
that Python do away with its explicit "self" parameter.  Guido
responded with a definitive "This won't change", but didn't want to
allow the PEP to be created just to be rejected.  A number of people
felt that the mailing lists weren't a sufficiently visible place for
this response, especially considering the huge number of times the
request has been presented.  Thomas Wouters proposed a "Rejected
Ideas" PEP that would list some of the more commonly raised proposals
that weren't really even worthy of a PEP, with references to the
appropriate python-list or python-dev discussions.  Tim Peters
nominated the alternate title "Don't Bother: PEPs Rejected Before
Being Written" which perhaps better summarizes the intent.  People
seemed generally in favor of the idea, and Thomas Wouters offered to
write up a first draft indicating three major rejected ideas:

* removing the explicit "self" parameter
* upgrading the Python parser beyond a simple LL(1)
* allowing parentheses to be omitted in function calls

At the time of this summary, no PEP was yet available.

Contributing threads:

 - `Draft proposal: Implicit self in Python 3.0
<http://mail.python.org/pipermail/python-dev/2006-January/059446.html>`__
 - `Rejected ideas PEP (was re: Draft proposal: Implicit self in
Python 3.0) <http://mail.python.org/pipermail/python-dev/2006-January/059514.html>`__

[SJB]

-------------------------------
Using ssize_t as the index type
-------------------------------

Continuing from `last week`_, more process was made towards `PEP 353`_.

Tim Peters, Neal Norwitz, and Martin v. L?wis discussed replacing '#'
as a format character, and how this could be down in a backwards
compatible way; they also discussed how Py_ssize_t could be output
correctly in a printf-style statement.  Martin suggested using %zd,
but this isn't in VC 7.1; Tim suggested that a macro be added to
pyport.h, which would use "z" where possible, and define something
else where not (e.g. Windows).  Tim also suggested that PyErr_Format()
and PyString_Format() should be taught to recognize the "z" qualifier,
with the macros hidden inside the implementation of those functions.

M.-A. Lemburg pointed out other changes of output parameter types
which will cause problems in extensions, and worried that authors
wouldn't be able to get these converted in time for Python 2.5. 
Martin disagreed.  While code will continue to work with 32-bit
systems with little work, more needs to be done for 64-bit systems. 
Martin suggested that users could continue to use 32-bit Python (since
nothing will be gained by using 64-bit anyway) until the required
changes are made.  For more details, see the "Open Issues" section of
the PEP.

 .. _last week:
http://www.python.org/dev/summary/2005-12-16_2005-12-31.html#using-ssize-t-as-the-index-type
 .. _PEP 353: http://www.python.org/peps/pep-0353.html

Contributing threads:

 - `[Python-checkins] commit of r41906 -
python/branches/ssize_t/Objects/obmalloc.c
<http://mail.python.org/pipermail/python-dev/2006-January/059381.html>`__
 - `New PEP: Using ssize_t as the index type
<http://mail.python.org/pipermail/python-dev/2006-January/059437.html>`__
 - `[Python-checkins] r41972 -
python/branches/ssize_t/Objects/funcobject.c
<http://mail.python.org/pipermail/python-dev/2006-January/059516.html>`__
 - `Py_ssize_t output parameters (Was: [Python-checkins] r41971 ...)
<http://mail.python.org/pipermail/python-dev/2006-January/059597.html>`__

[TAM]

-------------------------------------
Adding ctypes to the standard library
-------------------------------------

Thomas Heller suggested that ctypes be included in core Python
(starting with 2.5).  The common response was that while ctypes is a
useful, popular, mature module, it does make it very easy to get a
core dump, which violates the guideline that if you get a core dump
it's a bug in Python or in a third party extension or you're doing
something harebrained.  On the other hand, it was pointed out that the
dl module suffers from the same problem, and is included without any
warnings (the documentation was later fixed to include warnings).

Martin v. L?wis suggested making ctypes a dynamically loaded module
(ctypes.pyd), so administrators could remove it, and
I could also make it a separate option in the Windows installer, so
administrators could opt out of installing it.  Everyone seemed happy
with prominent warnings in the documentation, so the plan was to check
this in.  However, licensing issues were hit with libffi, so the
check-in is on hold for the moment.  Stay tuned for more exciting news
on this next fortnight!

Contributing thread:

 - `Include ctypes into core Python?
<http://mail.python.org/pipermail/python-dev/2006-January/059604.html>`__

[TAM]

-----------------------------------------
Adding tests when no fix is yet available
-----------------------------------------

After Georg Brandl checked in a test for the compiler module without a
corresponding fix, Tim Peters reverted the change, indicating that no
check-in should ever leave the repository in such a state that
``regrtest.py -uall`` fails. The ensuing thread discussed a number of
ways of checking in a test for a bug when code to fix the bug was not
yet available. Neal Norwitz proposed adding two files to Lib/test,
outstanding_bugs.py and outstanding_crashes.py, which would include
the appropriate tests, but which would not be run under ``regrtest.py
-uall``.  Some people were concerned about the maintainability of
keeping failing tests for a module separate from the other tests of
that module, so Neal Norwitz and Scott David Daniels presented a
patch_ and a recipe_ for decorators that mark individual test
functions as failing.

No official pronouncement on how failing tests should be added to the
Python test suite had been made at the time of this summary.

.. _patch: http://python.org/sf/1399935
.. _recipe: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/466288

Contributing thread:

 - `Checking in a broken test was: Re: [Python-checkins] r41940 -
python/trunk/Lib/test/test_compiler.py
<http://mail.python.org/pipermail/python-dev/2006-January/059481.html>`__
 - `r42003 - python/trunk/Lib/test/outstanding_bugs.pypython/trunk/Lib/test/outstanding_crashes.py
<http://mail.python.org/pipermail/python-dev/2006-January/059599.html>`__

[SJB]

-------------------------------------------
Running the test suites in multiple locales
-------------------------------------------

Georg Brandl noted that unicode format modifiers were (in SVN)
incorrectly using the locale (one should always use locale.format to
get locale-aware formatting).  Fredrik Lundh suggested that all test
should be run in a different locale than C to detect these bugs,
perhaps adding a "use setlocale" flag to the test runner, to simplify
this.  Neal Norwitz made a patch to do this, finding a failure in
test_email and two failures in test_re.

Contributing thread:

 - `locale and LC_NUMERIC
<http://mail.python.org/pipermail/python-dev/2006-January/059530.html>`__

[TAM]

-----------------------------------------------------------
Replacing the docutils directory with an svn:externals link
-----------------------------------------------------------

David Goodger replaced the static copy of docutils in the "peps"
repository with a svn:externals link to the docutils repository. There
was some concern about svn querying servers other than svn.python.org
(the docutils repository is hosted on svn.berlios.de) and about
linking to a potentially broken repository.  David assured python-dev
that the svn.berlios.de server was hardly ever unreachable, and
changed the svn:externals link to select the 0.4 revision of docutils
instead of the trunk.  That guaranteed a non-broken copy of docutils,
and made updating to a new revision just a simple propedit.

Contributing thread:

 - `r42015 - peps/trunk
<http://mail.python.org/pipermail/python-dev/2006-January/059676.html>`__

[SJB]

--------------
Tkinter status
--------------

A brief message from Joseph Rodrigues asking about the status of
Tkinter in Python started a short thread about how Tkinter is
maintained in Python. Martin v. L?wis is the primary maintainer, and
he mainly focuses on integrating user contributions and making sure
that Python is compatible with the latest release of Tcl/Tk.  New
widgets don't get wrapped automatically - if you want one supported,
you should submit a patch.

Contributing thread:

 - `Tkinter <http://mail.python.org/pipermail/python-dev/2006-January/059588.html>`__

[SJB]

------------------------------------
Roadmap for ConfigParser development
------------------------------------

Once again, the output capability of ConfigParser was brought up; this
time by Facundo Bastista, who `submitted a patch`_ that orders the
output so that doctest output can be easily reliable.  He pointed out
that there is `another open patch`_ that allows the user to specify
the order through an "ordered dictionary".  Guido explained that he
didn't feel that it mattered, as long as the patch also allows
comments to be preserved; his preference was for everything (ordering,
blank lines, and comments) to be preserved.  Tony Meyer point out some
examples_ of previous_ `python-dev discussion`_ about how ConfigParser
should be modified, and that SpamBayes_ includes a ConfigParser
subclass that allows 'surgical' editing of files.

 .. _submitted a patch: http://python.org/sf/1399309
 .. _another open patch: http://python.org/sf/1371075
 .. _previous: http://mail.python.org/pipermail/python-dev/2004-October/049454.html
 .. _python-dev discussion:
http://mail.python.org/pipermail/python-dev/2004-October/049527.html
 .. _examples: http://aspn.activestate.com/ASPN/Mail/Message/python-dev/1483518
 .. _SpamBayes: http://spambayes.org

Contributing thread:

 - `ConfigParser to save with order
<http://mail.python.org/pipermail/python-dev/2006-January/059480.html>`__

[TAM]

-------------------------------
Patches for the logging package
-------------------------------

Shane Hathaway asked about the process for submitting patches for the
logging package.  Vinay Sajip is the primary maintainer, and accepts
patches (compatible with Python 1.5.2) through sourceforge as normal,
though personal emails are appropriate if you are worried about
spending time on a patch that is not accepted.  There was a brief
followup discussion about how to get the logging package to interact
nicely with external log rotation tools, including the possible
creation of a ``reopen()`` function for files, but the thread trailed
off without any solid conclusion on this issue.

Contributing thread:

 - `Logging enhancements
<http://mail.python.org/pipermail/python-dev/2006-January/059566.html>`__

[SJB]

----------------------------------
os.path.getmtime() bugs on Windows
----------------------------------

Christian Tismer noted that if, in a single interactive session on
Windows, create a file, get its os.path.getmtime(), change your time
zone, and get its os.path.getmtime() again, the time stamps are
different.  He asked whether there was a way to circumvent the
problem, or if a patch could be created.  Tim Peters gave him a
`reference to a CodeProject page` that discusses the problem.  Martin
v. L?wis has meant to work on a patch for several years; his plan is
to drop usage of msvcrt's stat(3), and instead implement os.stat in
terms of Windows API directly - this would also have the advantage
that subsecond time-stamps can be exposed.  This patch would need to
be implemented twice; once for Win9X (ANSI file names) and once for
NT+ (unicode file names).

 .. _reference to a CodeProject page:
http://www.codeproject.com/datetime/dstbugs.asp

Contributing thread:

 - `os.path.getmtime on Windows
<http://mail.python.org/pipermail/python-dev/2006-January/059741.html>`__

[TAM]

----------------------------------------
Generating Python-ast.c and Python-ast.h
----------------------------------------

Python-ast.c and Python-ast.h are generated automatically from
Parser/asdl_c.py and then checked into Subversion. However, a ``make
distclean`` removes these files, and if you do not have a 2.2+ version
of Python available, they cannot be regenerated.  The best solution
seemed to be to alter ``make distclean`` to not remove Python-ast.c
and Python-ast.h as they only need to be regenerated when the AST
definition changes, which is rather infrequent.

Contributing thread:

- `[Python-checkins] commit of r41880 -
python/trunk/Python/Python-ast.c
<http://mail.python.org/pipermail/python-dev/2006-January/059356.html>`__

[SJB]

-----------------------------------------
Allowing dict subclasses for exec globals
-----------------------------------------

Currently, the ``exec`` statement allows the locals expression (the
second expression after ``in``) to be any mapping type.  The globals
expression (the first expression after ``in``) should be a dict
object, but Python does not currently raise an exception if you use a
dict subclass, though it will not call any overridden methods
correctly.  `Crutcher Dunnavant presented a patch`_ that allows the
globals expression to be a dictionary subclass such that overridden
methods are called properly.  Because it gives Python new
capabilities, if the patch is accepted, it will not become part of
Python until 2.5.

.. _Crutcher Dunnavant presented a patch: http://www.python.org/sf/1402289

Contributing thread:

 - `[PATCH] Fix dictionary subclass semantics when used as global
dictionaries <http://mail.python.org/pipermail/python-dev/2006-January/059625.html>`__

[SJB]

--------------------------------------
Finding an appropriate recursion limit
--------------------------------------

Python limits the depth of the function call stack.  Too low a limit,
and some functions fail needlessly.  Too high a limit, and some
programs get a segmentation fault instead of an exception.  There is
no easy, automated, way to find the "right" limit.

Contributing thread:

- `Limiting the recursion limit
<http://mail.python.org/pipermail/python-dev/2006-January/059652.html>`__

[Jim Jewett]

------------------------
When is a PEP necessary?
------------------------

Q.  Why are so many PEPs about changes to syntax or the core language
instead of (less intrusive) changes to the standard library?

A.  Unintrusive changes to the standard library can often just go in
without the overhead of a PEP.  This process *is* different from some
other languages.

Contributing thread:

 - `PEP and stdlib
<http://mail.python.org/pipermail/python-dev/2006-January/059694.html>`__

[Jim Jewett]

--------------------------------
Mixing file iteration techniques
--------------------------------

'for lines in file:' uses a buffer; doing an explicit readline does
not use that buffer, which can lead to corrupted data.  Thomas Wouters
submitted a patch to raise an error instead of silently corrupting
data.  For backwards compatibility, it still doesn't complain when the
mixing doesn't happen to corrupt data.

He chose to raise an error instead of correcting the problem (by using
the buffer exactly when he now raises an error) to minimize the
changes.

Contributing thread:

 - `file.next() vs. file.readline()
<http://mail.python.org/pipermail/python-dev/2006-January/059410.html>`__

[Jim Jewett]

-------------------------------------
Multiple interpreters sharing objects
-------------------------------------

Having multiple interpreters sharing the same object isn't heavily
tested. There is a threading-related bug (fixed in 2.4.2) that can
result in (false) complaints about being run in restricted mode.  In
addition, if a thread finishes, another interpreter might reuse the
thread id, which wasn't quite fully cleaned up.  Various small patches
were proposed; none are perfect, all are probably an improvement.

Contributing threads:

 - `Sharing between multiple interpreters and restricted mode
<http://mail.python.org/pipermail/python-dev/2006-January/059412.html>`__
 - `PyThreadState_Delete vs PyThreadState_DeleteCurrent
<http://mail.python.org/pipermail/python-dev/2006-January/059595.html>`__
 - `pystate.c changes for Python 2.4.2
<http://mail.python.org/pipermail/python-dev/2006-January/059716.html>`__

[Jim Jewett]

-----------------------------
Unicode exceptions with print
-----------------------------

What to do if the output encoding can't handle the text you just sent
it? Should it just substitute something (losing information) or should
it really throw an exception?  (What is wrong?  Argh!  I can't even
print the bad data out!)

Contributing thread:

 - `Unicode print/stdoutput exceptions are not nice
<http://mail.python.org/pipermail/python-dev/2006-January/059715.html>`__

[Jim Jewett]

--------------
curses testing
--------------

Alone, the setupterm call [curses.setupterm(sys.__stdout__.fileno())]
does nothing remarkable, but when it is done inside of
curses.initscr() / curses.endwin() the terminal is not restored
properly.  Georg Brandl thinks that if setupterm() is to be tested, it
should be executed before initscr().

Contributing thread:

 - `Birkenfeld's gone
<http://mail.python.org/pipermail/python-dev/2006-January/059492.html>`__

[Jim Jewett]

---------------------
Momentary API changes
---------------------

Some functions were turned into macros, which are not so good for
dynamic linking. This was later fixed.

Contributing thread:

- `API changes <http://mail.python.org/pipermail/python-dev/2006-January/059374.html>`__

[Jim Jewett]

----------------------
sudo security concerns
----------------------

If you can run a script as someone else (including root), and can set
the environment variables, then you can get a python interactive
session as that someone.

Contributing thread:

 - `sudo security hole w/ potential Python connection
<http://mail.python.org/pipermail/python-dev/2006-January/059586.html>`__

[Jim Jewett]

----------------------------
Problems with tar on Solaris
----------------------------

GNU tar should be used on Solaris, as the Solaris tar has problems.

Contributing thread:

 - `TAR problems under Solaris
<http://mail.python.org/pipermail/python-dev/2006-January/059415.html>`__

[Jim Jewett]

----------------------------
That which we call a rose...
----------------------------

"Reinhold Birkenfeld" was a pseudonym Georg Brandl first used when he
was sixteen.  Three years (plus change) later, he has decided to
become known within the Python development community by his real name.
 Among the expected humourous replies, there was some discussion about
whether pseudonyms should be permitted for people contributing to
Python, but this (including exactly what a "contribution" is) wasn't
resolved.

Contributing thread:

 - `Birkenfeld's gone
<http://mail.python.org/pipermail/python-dev/2006-January/059492.html>`__

[TAM]

==================
Previous Summaries
==================

 - `When do sets shrink?
<http://mail.python.org/pipermail/python-dev/2006-January/059346.html>`__
 - `Including zlib...
<http://mail.python.org/pipermail/python-dev/2006-January/059372.html>`__
 - `a quit that actually quits
<http://mail.python.org/pipermail/python-dev/2006-January/059384.html>`__
 - `Real time behaviour of Pythons memory management; WAS: RE:
Documentation about Python's GC,python-dev list messages referenced in
Modules/gcmodule.c notreachable anymore
<http://mail.python.org/pipermail/python-dev/2006-January/059408.html>`__
 - `slight inconsistency in svn checkin email subject lines
<http://mail.python.org/pipermail/python-dev/2006-January/059355.html>`__
 - `buildno (Was: [Python-checkins] commit of r41907-
python/trunk/Makefile.pre.in) 
<http://mail.python.org/pipermail/python-dev/2006-January/059419.html>`__

===============
Skipped Threads
===============

 - `Weekly Python Patch/Bug Summary
<http://mail.python.org/pipermail/python-dev/2006-January/059352.html>`__
 - `current test problems
<http://mail.python.org/pipermail/python-dev/2006-January/059360.html>`__
 - `mac memory leaks
<http://mail.python.org/pipermail/python-dev/2006-January/059367.html>`__
 - `bsddb broken
<http://mail.python.org/pipermail/python-dev/2006-January/059425.html>`__
 - `Jython and CPython
<http://mail.python.org/pipermail/python-dev/2006-January/059434.html>`__
 - `Compiler warnings for 64-bit portability problems
<http://mail.python.org/pipermail/python-dev/2006-January/059464.html>`__
 - `some interesting readings
<http://mail.python.org/pipermail/python-dev/2006-January/059482.html>`__
 - `Birkenfeld's gone
<http://mail.python.org/pipermail/python-dev/2006-January/059492.html>`__
 - `Python-Dev Digest, Vol 29, Issue 111
<http://mail.python.org/pipermail/python-dev/2006-January/059494.html>`__
 - `PyCon TX 2006: Early-bird registration ends Jan. 15!
<http://mail.python.org/pipermail/python-dev/2006-January/059511.html>`__
 - `test_curses
<http://mail.python.org/pipermail/python-dev/2006-January/059528.html>`__
 - `sudo security hole w/ potential Python connection
<http://mail.python.org/pipermail/python-dev/2006-January/059586.html>`__
 - `Python-Dev Digest, Vol 30, Issue 32
<http://mail.python.org/pipermail/python-dev/2006-January/059587.html>`__
 - `Hello <http://mail.python.org/pipermail/python-dev/2006-January/059628.html>`__
 - `DRAFT: python-dev Summary for 2005-12-01 through 2005-12-15
<http://mail.python.org/pipermail/python-dev/2006-January/059713.html>`__
 - `DRAFT: python-dev Summary for 2005-12-16 through 2005-12-31
<http://mail.python.org/pipermail/python-dev/2006-January/059717.html>`__
 - `DRAFT: python-dev Summary for 2005-12-16 through2005-12-31
<http://mail.python.org/pipermail/python-dev/2006-January/059726.html>`__
 - `Python icon
<http://mail.python.org/pipermail/python-dev/2006-January/059738.html>`__




========
Epilogue
========

This is a summary of traffic on the `python-dev mailing list`_ from
January 01, 2006 through January 15, 2006.
It is intended to inform the wider Python community of on-going
developments on the list on a semi-monthly basis.  An archive_ of
previous summaries is available online.

An `RSS feed`_ of the titles of the summaries is available.
You can also watch comp.lang.python or comp.lang.python.announce for
new summaries (or through their email gateways of python-list or
python-announce, respectively, as found at http://mail.python.org).

This is the 11th summary written by the python-dev summary deuce of
Steve Bethard and Tony Meyer (Happy New Year!).

To contact us, please send email:

- Steve Bethard (steven.bethard at gmail.com)
- Tony Meyer (tony.meyer at gmail.com)

Do *not* post to comp.lang.python if you wish to reach us.

The `Python Software Foundation`_ is the non-profit organization that
holds the intellectual property for Python.  It also tries to advance
the development and use of Python.  If you find the python-dev Summary
helpful please consider making a donation.  You can make a donation at
http://python.org/psf/donations.html .  Every cent counts so even a
small donation with a credit card, check, or by PayPal helps.


--------------------
Commenting on Topics
--------------------

To comment on anything mentioned here, just post to
`comp.lang.python`_ (or email python-list at python.org which is a
gateway to the newsgroup) with a subject line mentioning what you are
discussing.  All python-dev members are interested in seeing ideas
discussed by the community, so don't hesitate to take a stance on
something.  And if all of this really interests you then get involved
and join `python-dev`_!


-------------------------
How to Read the Summaries
-------------------------

The in-development version of the documentation for Python can be
found at http://www.python.org/dev/doc/devel/ and should be used when
looking up any documentation for new code; otherwise use the current
documentation as found at http://docs.python.org/ .  PEPs (Python
Enhancement Proposals) are located at http://www.python.org/peps/ .
To view files in the Python CVS online, go to
http://svn.python.org/projects/python/ .  Reported
bugs and suggested patches can be found at the SourceForge_ project
page.

Please note that this summary is written using reStructuredText_.
Any unfamiliar punctuation is probably markup for reST_ (otherwise it
is probably regular expression syntax or a typo :); you can safely
ignore it.  We do suggest learning reST, though; it's simple and is
accepted for `PEP markup`_ and can be turned into many different
formats like HTML and LaTeX.  Unfortunately, even though reST is
standardized, the wonders of programs that like to reformat text do
not allow us to guarantee you will be able to run the text version of
this summary through Docutils_ as-is unless it is from the
`original text file`_.

.. _python-dev: http://www.python.org/dev/
.. _SourceForge: http://sourceforge.net/tracker/?group_id=5470
.. _python-dev mailing list: http://mail.python.org/mailman/listinfo/python-dev
.. _c.l.py:
.. _comp.lang.python: http://groups.google.com/groups?q=comp.lang.python
.. _PEP Markup: http://www.python.org/peps/pep-0012.html

.. _Docutils: http://docutils.sf.net/
.. _reST:
.. _reStructuredText: http://docutils.sf.net/rst.html
.. _PSF:
.. _Python Software Foundation: http://python.org/psf/

.. _last summary: http://www.python.org/dev/summary/2005-12-01_2005-12-15.html
.. _original text file:
http://www.python.org/dev/summary/2006-01-01_2006-01-15.ht
.. _archive: http://www.python.org/dev/summary/
.. _RSS feed: http://www.python.org/dev/summary/channews.rdf


From brianomorchoe at yahoo.co.uk  Mon Feb 27 15:35:53 2006
From: brianomorchoe at yahoo.co.uk (Brain Murphy)
Date: Mon, 27 Feb 2006 20:35:53 +0000 (GMT)
Subject: newbie
Message-ID: <20060227203553.44475.qmail@web25702.mail.ukl.yahoo.com>

I have some questions, 1) I am trying to have multiple def's but it is not working.
  for instance, i am using the tutoreals and am trying to combine the phone book as well as the grades..ect so that it would look somthing like this:
   
  def print_options():
              print "options:"
              print " 'p' print options"
              print " 'g' grades"
              print " 'b' phonebook"
              print " 'q' quit"
  choice ="p"
  while choice != "q":
          if choice == "g":
              def print_menu():
  ...ect
  what am i doing wrong.
   
  also i have heard that there are no crackers using python why is this??
   
  Brian

		
---------------------------------
Win a BlackBerry device from O2 with Yahoo!. Enter now.
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From python.list at tim.thechases.com  Wed Feb  8 12:17:42 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Wed, 08 Feb 2006 11:17:42 -0600
Subject: breadth first search
In-Reply-To: <43ea2271$1@127.0.0.1>
References: <43ea2271$1@127.0.0.1>
Message-ID: <43EA27B6.2080409@tim.thechases.com>

> Anyone know how to implement breadth first search using Python? 

Yes.  Granted, for more details, you'd have to describe the data 
structure you're trying to navigate breadth-first.

 > Can Python create list dynamically

Is Perl write-only?
Does Lisp use too many parens?
Of course! :)

Not only can Python create lists dynamically, but it's one of 
Python's strong points.

     x = []
     x.append(42)
     x.append("hello")
     h = x.pop()
     ft = x.pop()

> I want to implement a program which will read data
> from a file and store each line into a list, is this possible?

     x = [line[:-1] for line in open("file.txt", "r").readlines()]

will assign the contents of the file "file.txt" to the list "x", 
making x[0] the first line in the file and x[-1] is the last line 
in the file.

If you want to make other use of the file, you can open a file 
object first:

     fileObject = open("file.txt", "r")
     x = [line[:-1] for line in fileObject.readlines()]
     # use fileObject elsehow here
     fileObject.close()

The convention of using the "line[:-1]" strips off the newline at 
the end of each line.  Otherwise, you can just use "line" instead 
of "line[:-1]"

-tkc







From xavier.morel at masklinn.net  Wed Feb  8 14:23:28 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Wed, 08 Feb 2006 20:23:28 +0100
Subject: A __getattr__ for class methods?
In-Reply-To: <1139421293.213901.5380@f14g2000cwb.googlegroups.com>
References: <1139421293.213901.5380@f14g2000cwb.googlegroups.com>
Message-ID: <dsdgaq$s9c$1@aphrodite.grec.isp.9tel.net>

Dylan Moreland wrote:
> I'm trying to implement a bunch of class methods in an ORM object in
> order to provide functionality similar to Rails' ActiveRecord. This
> means that if I have an SQL table mapped to the class "Person" with
> columns name, city, and email, I can have class methods such as:
> 
>     Person.find_by_name
>     Person.find_by_city_and_name
>     Person.find_by_name_and_city_and_email
> 
> I have a metaclass generating basic properties such as .name and .city,
> but I don't want to generate a class method for every permutation of
> the attributes. I'd like to have something much like __getattr__ for
> instance attributes, so that if a method like
> Person.find_by_city_and_email cannot be found, I can construct a call
> to the basic find method that hides the SQL. Is there any way of doing
> this, or am I trying to mirror a functionality that Python simply does
> not have?
> 
I'm not sure that the way you tackled this is the good approach: while 
it's quite flexible as far as the search criteria go, it'll require less 
than obvious code to match keywords (field names) and values, will lead 
to somewhat verbose syntax (especially with many criteria), and the 
syntax itself is unforgiving (every new search field requires at least 5 
additional characters on top of the field name itself), brittle (you'll 
have to do an extensive validation of your method name and fields unless 
you want everything to break, and Python doesn't support your syntax) 
and not really pythonic.

Since you seem to know ActiveRecord, you're probably familiar with the 
way AR does this task: with a hash of column_name, value pairs. The 
syntax is quite straightforward especially due to the fact that any "key 
=> value" comma-separated pairs sequence generates a hash, without 
requiring explicit hash boundaries ( { and } ). The syntax is extremely 
straightforward since it relies on the language's syntax itself, and the 
correctness of the grammar is checked by the compiler/interpreter itself 
since no custom syntax is built. This construct is therefore quite 
solid, on top of being obvious to a Rubyist.

Now, you're in luck, because Python has even better than that: **kwargs, 
the optional keyword arguments.

As you probably know, Python has a good support for keyword args, 
allowing you to fill your arguments out of order (and leave the 3th 
argument at it's default value while specifying the value of the 5th 
argument). But **kwargs goes beyond the regular explicit keyword 
arguments: when specified, **kwargs is a dict populated with the 
implicit keyword arguments (keyword:value pairs), the ones you haven't 
specified in the argument tuple of your method.

This means that if I define a function as

def foo(bar=0, **kwargs):
     print kwargs

Then calling foo() will print an empty dict
As will calling foo(3) or foo(bar=3), because the explicit "bar" keyword 
argument is used.

Now if I call foo(something=5, somethingelse="woohoo"), kwargs will 
evaluate to

{"somethingelse":"woohoo","something":5}

This means that all you have to do is replace your method definition with

 >>> def find_by(cls, **kwargs): pass

and in the method itself iterate over the key:value pairs of kwargs to 
automagically get both the field names and the values upon which your 
search shall be performed.

Calling the method would then look something like:

 >>> Person.find_by( name="thenameyoulookfor", city="somecity")
the syntax is fairly obvious and pythonic, has a low verbosity, and 
Python itself will do the parsing and the grammatical validation of your 
method calls for you.


From fccoelho at gmail.com  Thu Feb  2 14:12:17 2006
From: fccoelho at gmail.com (Flavio)
Date: 2 Feb 2006 11:12:17 -0800
Subject: PyQt: QListView how to retrieve selected items?
Message-ID: <1138907537.417067.228570@z14g2000cwz.googlegroups.com>

Hi,

I have a QListview widget that allows me to store a bunch of strings in
it. This strings can be visualized, sorted, selected, etc.

My Problem is that I cant find a way to get the user selected items
back from it! I looked over the Qt documentation many times over but
there is no method to that end.

Any PyQt guru lurking around?

should I try some other list widget, that has a "getSelected()"method?
Is there one?

any help will be appreciated.

Flavio



From david at quanterium.zzn.com  Fri Feb 10 13:08:09 2006
From: david at quanterium.zzn.com (david at quanterium.zzn.com)
Date: 10 Feb 2006 10:08:09 -0800
Subject: Are there memory limits for external C modules?
References: <1138296994.153294.183610@g43g2000cwa.googlegroups.com>
	<mailman.1095.1138298525.27775.python-list@python.org>
	<1138316171.607603.299130@g49g2000cwa.googlegroups.com>
Message-ID: <1139594889.705062.55060@g47g2000cwa.googlegroups.com>

david at quanterium.zzn.com wrote:
> I was able to modify my C code so that instead of being a Python
> module, it runs as a standalone binary, and it works as it should.
> Calling it with os.spawn* works.  The two versions are essentially the
> same, the primary differences being the necessary difference in how
> arguments and return values are handled.
>
> This will work if necessary, but I would think having it as a Python
> module would be slightly more elegant and efficient since we avoid the
> overhead of setting up new processes.

I was able to resolve this issue. I was missing a call into Ethereal
that allocated necessary memory.  Now the Python module version works,
and some various GLib assert warnings I was getting have gone away as
well.

Some testing has shown that the Python module version is quicker; I'm
assuming that the overhead involved in setting up a separate process
was slowing things down.  There was a noticeable difference.

- David



From jstroud at ucla.edu  Tue Feb 28 00:37:18 2006
From: jstroud at ucla.edu (James Stroud)
Date: Mon, 27 Feb 2006 21:37:18 -0800
Subject: type = "instance" instead of "dict"
In-Reply-To: <1141069989.763239.191140@u72g2000cwu.googlegroups.com>
References: <1141069989.763239.191140@u72g2000cwu.googlegroups.com>
Message-ID: <du0nie$egt$1@daisy.noc.ucla.edu>

Cruella DeVille wrote:
> I'm trying to implement a bookmark-url program, which accepts user
> input and puts the strings in a dictionary. Somehow I'm not able to
> iterate myDictionary of type Dict{}
> 
> When I write print type(myDictionary) I get that the type is
> "instance", which makes no sense to me. What does that mean?
> Thanks
> 

Perhaps you did not know that you can inheret directly from dict, which 
is the same as {}. For instance:

class Dict({}):
   pass

Is the same as

class Dict(dict):
   pass

Now Dict can do everything that dict ({}) can do, but you can also 
specialize it:

py> class Dict(dict):
...   def __str__(self):
...     return "I am %s long. But you should read the tutorial!" % len(self)
...
py> d = Dict()
py> d['a'] = 1
py> d['b'] = 2
py>
py> d['a']
1
py> d['b']
2
py> print d
I am 2 long. But you should read the tutorial!

James


From rabkin at mweb[DOT]co[DOT]za  Sun Feb 19 11:10:54 2006
From: rabkin at mweb[DOT]co[DOT]za (Max)
Date: Sun, 19 Feb 2006 18:10:54 +0200
Subject: Should we still be learning this?
In-Reply-To: <mailman.2121.1140350134.27775.python-list@python.org>
References: <xuGdnQRiLabDiGrenZ2dnUVZ_tWdnZ2d@is.co.za>	<mailman.2092.1140267087.27775.python-list@python.org>	<veednZB1zsf4gGrenZ2dnUVZ_s-dnZ2d@is.co.za>
	<mailman.2121.1140350134.27775.python-list@python.org>
Message-ID: <HIqdncLa_8oRBWXenZ2dnUVZ_sCdnZ2d@is.co.za>

Felipe Almeida Lessa wrote:
> Em S?b, 2006-02-18 ?s 15:13 +0200, Max escreveu:
> 
>>>I wonder if they need some updating.
>>>
>>
>>And so does Dive Into Python (our textbook, diveintopython.org) which 
>>has the same deficiencies in its outline.
> 
> 
> Are they being *paid* for teaching? Then they should overcome this issue
> of Dive Into Python by either using their own material our by improving
> Dive Into Python and giving it back to the community.
> 

Indeed they are. It is a university course. It doesn't actually cover 
anything I don't know, but it's a choice between relearning Java and 
relearning Python (since I plan to major in computer science, I have to 
do first year)

--Max


From dmbkiwi at gmail.com  Sun Feb 26 03:24:23 2006
From: dmbkiwi at gmail.com (dmbkiwi at gmail.com)
Date: 26 Feb 2006 00:24:23 -0800
Subject: dateutil and dates before today
Message-ID: <1140942263.389308.133440@i39g2000cwa.googlegroups.com>

I'm using the dateutil module from http://labix.org/python-dateutil.

Am I right in thinking that the rrules module doesn't acknowledge days
before today?

An example of the issue:

>>> rule_temp = rrule(YEARLY,bymonth=1,bymonthday=1)
>>> print rule_temp.between(datetime(2006,12,1),datetime(2007,1,4),True)
[datetime.datetime(2007, 1, 1, 19, 21, 29)]
>>> print rule_temp.between(datetime(2005,12,1),datetime(2006,1,4),True)
[]
>>> print rule_temp.between(datetime(2005,12,1),datetime(2007,1,4),True)
[datetime.datetime(2007, 1, 1, 19, 21, 29)]
>>> print rule_temp.before(datetime.today(),True)
None
>>> print rule_temp.after(datetime.today(),True)
2007-01-01 19:21:29

Basically, it doesn't seem to acknowledge any dates before today.  Is
this right?

Cheers

Matt



From cjw at sympatico.ca  Sun Feb 19 15:53:35 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Sun, 19 Feb 2006 15:53:35 -0500
Subject: number ranges (was Re: Matlab page on scipy wiki)
In-Reply-To: <43F8D881.5030804@sympatico.ca>
References: <e86a5fd00602131854s73191cbbu742d4434ad074908@mail.gmail.com>
	<1139945386.3346.38.camel@pc1.cole.uklinux.net>
	<43F8D881.5030804@sympatico.ca>
Message-ID: <eV4Kf.152$XZ3.31816@news20.bellglobal.com>

Colin J. Williams wrote:
> Bryan Cole wrote:
> 
>>>       
>>> First, I think the range() function in python is ugly to begin with.
>>> Why can't python just support range notation directly like 'for a in
>>> 0:10'.  Or with 0..10 or 0...10 syntax.  That seems to make a lot more
>>> sense to me than having to call a named function.   Anyway, that's a
>>> python pet peeve, and python's probably not going to change something
>>> so fundamental...   
>>
>>
>> There was a python PEP on this. It got rejected as having too many
>> 'issues'. Pity, in my view.
>>
>> see http://www.python.org/peps/pep-0204.html
>>
>> BC
>>  
>>
> This decision appears to have been made nearly six years ago.  It would
> be a good idea to revisit the decision, particularly since the reasons
> for rejection are not clearly spelled out.
> 
> The conditional expression (PEP 308) was rejected but is currently being
> implemented in Python version 2.5.  It will have the syntax A if C else B.
> 
> I have felt, as Gary Ruben says above, that the range structure is ugly.
> 
> Two alternatives have been suggested:
> a) a:b:c
> b) a..b..c
> 
> Do either of these create parsing problems?
> for i in a:b:
> Should this be treated as an error, with a missing c (the increment)
>  print i
> 
> for i in 2..5:
>  print i                                                           We
> don't know whether the 2 is an integer until the second period is scanned.
> 
> It would be good if the range and slice could be merged in some way,
> although the extended slice is rather complicated - I don't understand it.
> 
>    The semantics for an extended slicing are as follows. The primary
>    must evaluate to a mapping object, and it is indexed with a key that
>    is constructed from the slice list, as follows. If the slice list
>    contains at least one comma, the key is a tuple containing the
>    conversion of the slice items; otherwise, the conversion of the lone
>    slice item is the key. The conversion of a slice item that is an
>    expression is that expression. The conversion of an ellipsis slice
>    item is the built-in |Ellipsis| object. The conversion of a proper
>    slice is a slice object (see section section 4.2 The standard type
>    hierarchy <http://www.network-theory.co.uk/docs/pylang/ref_30.html>)
>    whose |start|, |stop| and |step| attributes are the values of the
>    expressions given as lower bound, upper bound and stride,
>    respectively, substituting |None| for missing expressions.
> 
> [source: http://www.network-theory.co.uk/docs/pylang/ref_60.html]
> 
> The seems to be a bit of a problem with slicing that needs sorting out.
> 
> The syntax for a slice list appears to allow multiple slices in a list:
> 
>    extended_slicing     ::=     primary <primaries.html#tok-primary> "["
>    slice_list <slicings.html#tok-slice_list> "]"
>    slice_list     ::=     slice_item <slicings.html#tok-slice_item> (","
>    slice_item <slicings.html#tok-slice_item>)* [","]
> 
> but the current interpreter reports an error:
> 
>     >>> a= range(20)
>     >>> a[slice(3, 9, 2)]
>    [3, 5, 7]
>     >>> a[slice(3, 9, 2), slice(5, 10)]
>    Traceback (most recent call last):
>      File "<interactive input>", line 1, in ?
>    TypeError: list indices must be integers
>     >>>
> 
> I have taken the liberty of cross posting this to c.l.p.
> 
> Colin W.
This was originally posted to the numpy discussion list.

Colin W.


From apardon at forel.vub.ac.be  Mon Feb 27 08:56:44 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 27 Feb 2006 13:56:44 GMT
Subject: How to do an 'inner join' with dictionaries
References: <1141047580.492771.97130@z34g2000cwc.googlegroups.com>
Message-ID: <slrne0618s.95h.apardon@rcpc42.vub.ac.be>

Op 2006-02-27, cyborg4 at walla.co.il schreef <cyborg4 at walla.co.il>:
> Let's say I have two dictionaries:
> dict1 is  1:23,  2:76,  4:56
> dict2 is  23:A, 76:B,  56:C
>
> How do I get a dictionary that is
> 1:A, 2:B, 4:C

Well how about the straight forward:

dict3 = {}
for key, value in dict1.iteritems():
    try:
        dict3[key] = dict2[value]
    except KeyError:
        pass

Or otherwise with a genexp

dict3 = dict((key, dict2[value]) for (key, value) in dict1.iteritems() if value in dict2)

-- 
Antoon Pardon
    


From duncanm255 at hotmail.com  Tue Feb 28 16:38:17 2006
From: duncanm255 at hotmail.com (D)
Date: 28 Feb 2006 13:38:17 -0800
Subject: Py2exe
In-Reply-To: <1141162463.658164.34110@i40g2000cwc.googlegroups.com>
References: <1141160676.947534.123630@t39g2000cwt.googlegroups.com>
	<1141162463.658164.34110@i40g2000cwc.googlegroups.com>
Message-ID: <1141162697.347464.49420@i40g2000cwc.googlegroups.com>

Jay - what I'm not sure of is the syntax to use.  I have downloaded and
installed py2exe.



From dausha at gmail.com  Thu Feb  9 20:41:55 2006
From: dausha at gmail.com (Ben Wilson)
Date: 9 Feb 2006 17:41:55 -0800
Subject: Newbie Q: dynamically assigning object attribute
Message-ID: <1139535715.486234.195690@g44g2000cwa.googlegroups.com>

I would like to dynamically assign object attributes:

dict = {
 a : 1,
 b : 2,
}

for key,val in dict :
  obj.key = val

To get:

print obj.a
1

I've googled to no effect, or maybe I'm needing to be hit with the
appropriately sized clue-by-four. Any assistance would be appreciated.

Regards,
Ben



From jdhunter at ace.bsd.uchicago.edu  Mon Feb 27 18:26:50 2006
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Mon, 27 Feb 2006 17:26:50 -0600
Subject: Matplotlib logarithmic scatter plot
References: <1141073994.346490.16070@j33g2000cwa.googlegroups.com>
	<1141075713.027689.66800@t39g2000cwt.googlegroups.com>
	<1141077576.303733.31070@i40g2000cwc.googlegroups.com>
Message-ID: <87irr0o01x.fsf@peds-pc311.bsd.uchicago.edu>

>>>>> "Derek" == Derek Basch <dbasch at yahoo.com> writes:

    Derek> Thanks for the reply. I need a scatter plot though. Can
    Derek> that be done?

You can set the scale of xaxis and yaxis to either log or linear for
scatter plots

In [33]: ax = subplot(111)

In [34]: ax.scatter( 1e6*rand(1000), rand(1000))
Out[34]: <matplotlib.collections.RegularPolyCollection instance at
0x9c32fac>

In [35]: ax.set_xscale('log')

In [36]: ax.set_xlim(1e-6,1e6)
Out[36]: (9.9999999999999995e-07, 1000000.0)

In [37]: draw()



From dbasch at yahoo.com  Mon Feb 27 19:14:31 2006
From: dbasch at yahoo.com (Derek Basch)
Date: 27 Feb 2006 16:14:31 -0800
Subject: Matplotlib logarithmic scatter plot
In-Reply-To: <87irr0o01x.fsf@peds-pc311.bsd.uchicago.edu>
References: <1141073994.346490.16070@j33g2000cwa.googlegroups.com>
	<1141075713.027689.66800@t39g2000cwt.googlegroups.com>
	<1141077576.303733.31070@i40g2000cwc.googlegroups.com>
	<87irr0o01x.fsf@peds-pc311.bsd.uchicago.edu>
Message-ID: <1141085671.456746.175090@i39g2000cwa.googlegroups.com>

Great! That worked fine after I played with it for a bit. One last
question though. How do I label the ticks with the product of the
exponentiation? For instance:

100 

instead of 

10**2

Thanks for all the help,
Derek Basch



From enleverlesX.XmcX at XmclaveauX.com  Wed Feb 22 14:48:56 2006
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI)
Date: Wed, 22 Feb 2006 20:48:56 +0100
Subject: PyUNO with different Python
References: <mailman.2306.1140622912.27775.python-list@python.org>
	<43fcad29$0$29099$5fc30a8@news.tiscali.it>
Message-ID: <43fcc038$0$19689$8fcfb975@news.wanadoo.fr>

Hi!

The second way don't run:

Traceback (most recent call last):
  File "C:\Program Files\OpenOffice.org 2.0\program\hello_world.py", line 1, 
in?
    import uno
  File "C:\Program Files\OpenOffice.org 2.0\program\uno.py", line 37, in ?
    import pyuno
ImportError: Module use of python23.dll conflicts with this version of 
Python.



@+

MCI




From kent at kentsjohnson.com  Sat Feb 25 11:06:58 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Sat, 25 Feb 2006 11:06:58 -0500
Subject: Is Python a Zen language?
In-Reply-To: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
Message-ID: <44007c0f$1_2@newspeer2.tds.net>

John Coleman wrote:
> Greetings,
>    I have a rough classification of languages into 2 classes: Zen
> languages and tool languages. A tool language is a language that is,
> well, a *tool* for programming a computer. C is the prototypical tool
> language. Most languages in the Algol family are tool languages. Visual
> Basic and Java are also tool languages. On the other hand, a Zen
> language is a language which is purported to transform your way of
> thinking about programming. Lisp, Scheme, Forth, Smalltalk and (maybe)
> C++ are Zen languages. Disciples acknowledge that it is difficult to
> pick up these languages but claim that, if you persevere, you sooner or
> later reach a state of computational satori in which it all makes
> sense. Interestingly enough, these languages often have books which
> approach scriptural status  e.g. SICP for Scheme.
> 
> So (assuming my classification makes sense)  which is Python?

Expanding on what Alex said :-)

Python is an excellent tool language, it is very pragmatic and powerful 
and makes it (relatively) easy to just get stuff done.

Python has one of your 'zen' aspects - using Python has definitely 
expanded the way I think about programming. Powerful built-in support 
for lists and dicts, first-class functions and easy introspection enable 
a style of programming that is difficult or impossible in Java and C++.

But Python is not difficult to pick up - it is notably easy - and I 
don't think anyone claims it leads to computational satori - it's more 
an attitude of "try it, you'll like it!". Using Python does seem to 
spoil people - I for one hate to code in Java now. Maybe "bliss" is a 
better word for it than "satori".

Kent


From c_shyone at yahoo.com  Fri Feb 17 11:08:48 2006
From: c_shyone at yahoo.com (Farel)
Date: 17 Feb 2006 08:08:48 -0800
Subject: Which is faster? (if not b in m) or (if m.count(b) > 0)
In-Reply-To: <43f313f7$0$32162$626a54ce@news.free.fr>
References: <1139976842.179801.285400@z14g2000cwz.googlegroups.com>
	<43f313f7$0$32162$626a54ce@news.free.fr>
Message-ID: <1140192528.930581.25850@f14g2000cwb.googlegroups.com>

Well, I could, but I was looking for answers from persons more
experienced in the ways of Python then myself....



From no at spam.com  Mon Feb 13 20:36:28 2006
From: no at spam.com (DH)
Date: Mon, 13 Feb 2006 19:36:28 -0600
Subject: ANN: PyGUI 1.6
In-Reply-To: <mailman.1867.1139867667.27775.python-list@python.org>
References: <mailman.1867.1139867667.27775.python-list@python.org>
Message-ID: <XPWdnY4pv929qWzeRVn-jw@comcast.com>

Wolfgang Keller wrote:
> Hello,
> 
> On Sun, 12 Feb 2006 07:50:56 +0100, greg wrote
> (in article <mailman.1780.1139755064.27775.python-announce-list at python.org>):
>> PyGUI is an experimental highly-Pythonic cross-platform
>> GUI API.
> 
> How "experimental" (or useable for productivity applications) would you 
> consider it compared to e.g. wxwidgets?
> 
> And, btw; I couldn't immediately figure out from the documentation which 
> widgets it supports. Does it support the Cocoa outline view, for example?

It sounds like you probably should stick with either wxpython or cocoa.

PyGUI is sort of a wrapper for other gui toolkits (only gtk & cocoa 
right now), to simplify the development of basic gui apps.
See the 'visual classes' part of the docs page for the controls it
supports.


From grig.gheorghiu at gmail.com  Thu Feb  2 12:54:33 2006
From: grig.gheorghiu at gmail.com (Grig Gheorghiu)
Date: 2 Feb 2006 09:54:33 -0800
Subject: Test driven programming, was Re: VB to Python migration
In-Reply-To: <drt031$b9f$1@wake.carmen.se>
References: <DjyCf.110918$AP5.12355@edtnps84>
	<1138421531.231633.41140@z14g2000cwz.googlegroups.com>
	<drj04s$7c6$1@wake.carmen.se>
	<1138566539.478552.113180@g49g2000cwa.googlegroups.com>
	<drlckk$ete$1@wake.carmen.se> <KPtDf.150306$AP5.92261@edtnps84>
	<drnd3j$s4d$1@wake.carmen.se> <rlSDf.148748$6K2.76617@edtnps90>
	<drq3r2$qmu$1@wake.carmen.se>
	<1138805691.431379.250290@z14g2000cwz.googlegroups.com>
	<drt031$b9f$1@wake.carmen.se>
Message-ID: <1138902873.271443.266750@g47g2000cwa.googlegroups.com>

Thanks for the insightful answer, Magnus. I have a lot of stuff to
digest from your message :-) Maybe I'll continue the discussion on the
mailing list you mentioned.

Grig



From felipe.lessa at gmail.com  Sat Feb 11 15:07:30 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sat, 11 Feb 2006 18:07:30 -0200
Subject: simple math question
In-Reply-To: <RuWdnVmaD4Q23XPeRVn-tw@rcn.net>
References: <RuWdnVmaD4Q23XPeRVn-tw@rcn.net>
Message-ID: <1139688450.9328.10.camel@kenshin>

Em S?b, 2006-02-11 ?s 14:52 -0500, John Salerno escreveu:
> Hi all. I'm just starting out with Python, so I'm a little slow right 
> now. :)
> 
> Can someone explain to me why the expression 5 / -2 evaluates to -3, 
> especially considering that -2 * -3 evaluates to 6?
> 
> I'm sure it has something to do with the negative number and the current 
> way that the / operator is implemented, but why doesn't it evaluate to 
> -2 instead?

It has to do with floating point operations. If you evaluate 5 / -2.0 or
5.0 / -2 you will have -2.5. It gives you -3 because of rounding to
integers. Look:

>>> round(-2.5)
-3.0
>>> round(+2.5)
3.0

This behavior is because -round(x) should be equal to round(-x).

Cya,
Felipe.

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From bonono at gmail.com  Sat Feb 25 09:18:45 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 25 Feb 2006 06:18:45 -0800
Subject: Is Python a Zen language?
In-Reply-To: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
Message-ID: <1140877125.574463.291690@e56g2000cwe.googlegroups.com>

don't know but there is "Zen of Python".



From steve at REMOVETHIScyber.com.au  Sun Feb 12 01:52:10 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sun, 12 Feb 2006 17:52:10 +1100
Subject: Clearing the screen
References: <1139688262.046667.296940@g14g2000cwa.googlegroups.com>
	<mailman.1761.1139688853.27775.python-list@python.org>
Message-ID: <pan.2006.02.12.06.52.05.360029@REMOVETHIScyber.com.au>

On Sat, 11 Feb 2006 18:14:02 -0200, Felipe Almeida Lessa wrote:

> Em S?b, 2006-02-11 ?s 12:04 -0800, mwt escreveu:
>> I'm doing some python programming for a linux terminal (just learning).
>> When I want to completely redraw the screen, I've been using
>> os.system("clear")
>> This command works when using python in terminal mode, and in IDLE.
>> However, when running a little .py file containing that command, the
>> screen doesn't clear. 
>> What to do?
> 
> There's one escape sequence that does what you want.
> 
> I am *not* sure if this solution is the correct one, but:
> 
> $ clear | hd
> 00000000  1b 5b 48 1b 5b 32 4a                              |.[H.[2J|
> 00000007
> $ python
> Python 2.3.5 (#2, Nov 20 2005, 16:40:39)
> [GCC 4.0.3 20051111 (prerelease) (Debian 4.0.2-4)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> print
> chr(0x1b)+chr(0x5b)+chr(0x48)+chr(0x1b)+chr(0x5b)+chr(0x32)+chr(0x4a),

Or even easier:

print "\x1b[H\x1b[2J"


which may or may not work, depending on the terminal you are using.



-- 
Steven.



From luismgz at gmail.com  Sun Feb 19 10:25:15 2006
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 19 Feb 2006 07:25:15 -0800
Subject: Python vs. Lisp -- please explain
In-Reply-To: <1140338593.555029.63860@g43g2000cwa.googlegroups.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<1140338593.555029.63860@g43g2000cwa.googlegroups.com>
Message-ID: <1140362715.264499.275380@z14g2000cwz.googlegroups.com>

>IMO, it's the lack of competing implementations.

I beg to differ in this point.
There are other implementations, but they are not called "python" and
they are not a 100% python in syntax and features.
For example, Boo is 95% python syntax wise, but statically typed.
This fundamental difference makes it as fast as C# or any other .NET
(or mono) language.
Being statically typed doesn't mean that you have to declare types
everywhere, like in C. It uses type inference, so you can declare a
variable x= 5 and the compiler will know that x is an integer of value
5.
Pyrex is statically typed too, but it's used mainly as an extension
language for Cpython.

Now talking specifically about python, there are projects aimed at
speeding it up substantially:

Pypy is a project that relies heavily in type inference (for
translation to lower level code) and dynamic optimization. It's based
mainly on psyco, which has already probed that it can massively speed
up python code.

Shed-Skin: it's a pyton-to-c++ compiler. It won't support the most
dynamic features of python, and requires the programmer to restric a
little bit his coding style in order to allow static compilation, but
so far it looks great (only one developer though..).



From collinw at gmail.com  Sun Feb 12 01:06:32 2006
From: collinw at gmail.com (Collin Winter)
Date: Sun, 12 Feb 2006 07:06:32 +0100
Subject: [ANN] functional 0.5 released
In-Reply-To: <dsl219$e62$1@sea.gmane.org>
References: <43aa6ff70602100913r6d896f16vef201d5d4099608d@mail.gmail.com>
	<dsl219$e62$1@sea.gmane.org>
Message-ID: <43aa6ff70602112206o69216242x582165cf0af682af@mail.gmail.com>

On 2/11/06, Neal Becker <ndbecker2 at gmail.com> wrote:
> I just installed from .tar.gz on fedora FC5 x86_64.  I ran into 1 small
> problem:
>
[snip]
> Because this distribution was installed --multi-version or --install-dir,
> before you can import modules from this package in an application, you
> will need to 'import pkg_resources' and then use a 'require()' call
> similar to one of these examples, in order to select the desired version:
>
>     pkg_resources.require("functional")  # latest installed version
>     pkg_resources.require("functional==0.5")  # this exact version
>     pkg_resources.require("functional>=0.5")  # this version or higher
>
> Processing dependencies for functional==0.5
>
> What's all this about multi-version?  Did I do something wrong?

I've tried installing the package in all sorts of ways and haven't
been able to reproduce this problem. I'm guessing that somewhere in
your setuptools configuration, however, that there's a config file
passing --multi-version or --install-dir without your knowledge. Do
you get this same message when installing other Python packages?

Thanks,
Collin Winter


From spe.stani.be at gmail.com  Tue Feb 21 18:31:54 2006
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 21 Feb 2006 15:31:54 -0800
Subject: Video.
In-Reply-To: <bAMKf.4037$UN.840@newsread2.news.pas.earthlink.net>
References: <bAMKf.4037$UN.840@newsread2.news.pas.earthlink.net>
Message-ID: <1140564714.745755.96320@g47g2000cwa.googlegroups.com>

- pymedia: http://www.pymedia.org/
- pyvideo: http://www.geocities.com/rtrocca/python/ (use avisynth)
- videocapture: http://videocapture.sourceforge.net/

If you are on Mac, you probably have access to everything by pyobjc.

Good luck,
Stani
--
http://pythonide.stani.be



From pprobert at wisc.edu  Thu Feb 23 16:56:09 2006
From: pprobert at wisc.edu (Paul Probert)
Date: Thu, 23 Feb 2006 15:56:09 -0600
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <dtla7j$pqs$1@newsreader3.netcologne.de>
References: <mailman.2369.1140730029.27775.python-list@python.org>
	<dtla7j$pqs$1@newsreader3.netcologne.de>
Message-ID: <dtlb1p$9q1$1@sea.gmane.org>

Claudio Grondi wrote:

>In similar situation I would start to blame the hardware for the 
>problem, so below a kind of checklist to go through:
>
>   1. have you changed any hardware?
>   2. have you installed new drivers?
>   3. have you connected via USB/Firewire/IDE or other interfaces/ports 
>etc. some new devices?
>   4. have you installed new BIOS?
>   5. is your RAM ok?
>   6. are you sure there is no CD/DVD in your CD/DVD drive?
>   7. are you sure there is no floppy disk in your floppy drive?
>   8. are you sure your CPU/motherboard/RAM is not overheating?
>
>Claudio
>  
>
Claudio,
  Thanks for the reply. I should have mentioned, this happens to just 
about every machine in our collection of about 20 machines. Each is of a 
different age, and the hardware is completely diverse. Each has either 
of NT4, win2k, or XP installed. They all belong to our domain

Paul Probert
University of Wisconsin



From webraviteja at gmail.com  Sat Feb 11 19:07:52 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 11 Feb 2006 16:07:52 -0800
Subject: Single-file executables
References: <daadb$43ee6b05$4275d90a$28181@FUSE.NET>
Message-ID: <1139702872.177824.323010@g47g2000cwa.googlegroups.com>

Actually, py2exe (from version 0.6.1) onwards does create single file
exes without ANY additional dependencies.



From fredrik at pythonware.com  Mon Feb 27 13:08:07 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 27 Feb 2006 19:08:07 +0100
Subject: ''.join() with encoded strings
References: <1141061067.253803.267540@i39g2000cwa.googlegroups.com>
Message-ID: <dtvf68$nij$1@sea.gmane.org>

"Sandra-24" wrote:

> I'd love to know why calling ''.join() on a list of encoded strings
> automatically results in converting to the default encoding. First of
> all, it's undocumented, so If I didn't have non-ascii characters in my
> utf-8 data, I'd never have known until one day I did, and then the code
> would break. Secondly you can't override (for valid reasons) the
> default encoding, so that's not a way around it. So ''.join becomes
> pretty useless when dealing with the real (non-ascii) world.

if all strings in a sequence are encoded strings (byte buffers), join does
the right thing.

if all strings in a sequence are Unicode strings, join does the right thing.

if all strings are ascii strings, join does the right thing.

the only way to mess up is to mix byte buffers containing encoded data
with decoded strings.  the solution is simple: make sure to *decode* all
data you're using, *before* using it.

</F>





From jstroud at ucla.edu  Mon Feb  6 22:32:52 2006
From: jstroud at ucla.edu (James Stroud)
Date: Mon, 06 Feb 2006 19:32:52 -0800
Subject: Getting Tkinter Text contents before destruction
In-Reply-To: <p4KdnfDfuth6knXeRVn-jw@nmt.edu>
References: <p4KdnfDfuth6knXeRVn-jw@nmt.edu>
Message-ID: <ds94d4$v95$1@daisy.noc.ucla.edu>

Bob Greschke wrote:
> Hi!
> 
> I want to grab the contents of a Text widget when the frame it's on gets 
> destroyed.  I tried TextWidget.bind("<Destroy>"... , but the widget is gone 
> before the call gets made, and I'd really hate to do something with the 
> function that gets called with TextWidgetsFrame.bind("<Destroy>", ..., since 
> that one function handles all of the frames in the program...or would that 
> even work?
> 
> How can I do this?
> 
> Thanks!
> 
> Bob
> 
> 

If TextWidgetsFrame inherets from frame, you can override the destroy() 
method which gets called when the parent gets destroyed. Or 
alternatively, you can override the __del__ function, which gets called 
when the reference count goes to 0:


py> from Tkinter import *
py> tk = Tk()
py> class F(Frame):
...   def destroy(self):
...     print 'bob'
...     Frame.destroy(self)
...
py> f = F(tk)
py> f.pack()
py> tk.destroy()
bob

James


From luis.armendariz at gmail.com  Wed Feb 15 17:42:43 2006
From: luis.armendariz at gmail.com (luis.armendariz at gmail.com)
Date: 15 Feb 2006 14:42:43 -0800
Subject: multiple inheritance
References: <1140041977.692748.133570@g43g2000cwa.googlegroups.com>
Message-ID: <1140043363.623260.224320@g43g2000cwa.googlegroups.com>

Hi Thomas,

When an object is created, the __init__ function will be called. Since
you didn't define it in Foobar, the search path finds the __init__
function in Foo, so that's the one that is called. The second __init__
in Bar is masked since it comes second in the inheritance list..

If you want to call both constructors, then what you did is fine! The
fact that 'x' comes from the Bar object is ok too. That's what you told
python to do. What did you expect if you are setting 'x' twice? I mean,
when I type the following two statements into the interpreter:

   a = 1
   a = 2

then after those two statements execute, the value of a is
naturally 2, not 1.  Same with your 'x'.

And what is wrong with the explicit calls to each constructor? After
all, in python, explicit is better than implicit. If you don't believe
me,
type "import this" in your interpreter:


>>> import this
The Zen of Python, by Tim Peters

Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.
Complex is better than complicated.
Flat is better than nested.
Sparse is better than dense.
Readability counts.
Special cases aren't special enough to break the rules.
Although practicality beats purity.
Errors should never pass silently.
Unless explicitly silenced.
In the face of ambiguity, refuse the temptation to guess.
There should be one-- and preferably only one --obvious way to do it.
Although that way may not be obvious at first unless you're Dutch.
Now is better than never.
Although never is often better than *right* now.
If the implementation is hard to explain, it's a bad idea.
If the implementation is easy to explain, it may be a good idea.
Namespaces are one honking great idea -- let's do more of those!



From ptmcg at austin.rr._bogus_.com  Mon Feb 20 10:50:59 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 20 Feb 2006 15:50:59 GMT
Subject: Regular expression gone mad
References: <1140432942.392985.148820@z14g2000cwz.googlegroups.com>
Message-ID: <DzlKf.28341$7y1.1279@tornado.texas.rr.com>

"fileexit" <mayyash at gmail.com> wrote in message
news:1140432942.392985.148820 at z14g2000cwz.googlegroups.com...
> Hi,
> Would someone please tell me what is going on here??!! Why does the
> following code work
>
> >>> a=r"Mem"
> >>> pat = re.compile(a)
> >>> m=pat.search(ProcMem, re.DOTALL)
> >>> m
> <_sre.SRE_Match object at 0xb7f7eaa0>
> >>> m.group(0)
> 'Mem'
>
>
> ProcMem contains:
>
> >>> print ProcMem
> MemTotal:      8247952 kB
> MemFree:       5980920 kB
> Buffers:        417044 kB
> Cached:         703036 kB
> SwapCached:          0 kB
> Active:        1440136 kB
> Inactive:       370668 kB
> HighTotal:     7405512 kB
> HighFree:      5977600 kB
> LowTotal:       842440 kB
> LowFree:          3320 kB
> SwapTotal:     8339440 kB
> SwapFree:      8339296 kB
> Dirty:              96 kB
> Writeback:           0 kB
> Mapped:         786672 kB
> Slab:           359208 kB
> Committed_AS:  2453912 kB
> PageTables:      24696 kB
> VmallocTotal:   106488 kB
> VmallocUsed:      8700 kB
> VmallocChunk:    96708 kB
> HugePages_Total:     0
> HugePages_Free:      0
> Hugepagesize:     2048 kB
>

Are you going to create re's for every line of that data?  Here's a
pyparsing version that generates the grammar for you (or you can modify this
example to generate re's if you prefer).

This is an unusual form for pyparsing. Typically, people construct an And in
their grammar by connecting expressions together with '+' operators (as in
the procMemEntry method of the example).  But here, we are generating the
list of entries, and then directly creating the And with the resulting list
of expressions.

Download pyparsing at http://pyparsing.sourceforge.net.

-- Paul

procMemData = """
MemTotal:      8247952 kB
MemFree:       5980920 kB
Buffers:        417044 kB
Cached:         703036 kB
SwapCached:          0 kB
Active:        1440136 kB
Inactive:       370668 kB
HighTotal:     7405512 kB
HighFree:      5977600 kB
LowTotal:       842440 kB
LowFree:          3320 kB
SwapTotal:     8339440 kB
SwapFree:      8339296 kB
Dirty:              96 kB
Writeback:           0 kB
Mapped:         786672 kB
Slab:           359208 kB
Committed_AS:  2453912 kB
PageTables:      24696 kB
VmallocTotal:   106488 kB
VmallocUsed:      8700 kB
VmallocChunk:    96708 kB
HugePages_Total:     0
HugePages_Free:      0
Hugepagesize:     2048 kB
"""
from pyparsing import Word,nums,Literal,Suppress,Group,And,Dict

# define an integer, and an integer kB value
integer = Word(nums).setParseAction(lambda s,l,t:int(t[0]))
numKb = integer + Suppress("kB")

# convenience method for extracting procMem entries
def procMemEntry(name, valExpr):
    return Group(Literal(name) + Suppress(":") + valExpr).setName(name)

# extract names from sample procMem data, and create list of matching value
expressions
names = [l.split(':')[0] for l in procMemData.split('\n') if l]
exprs = [n.startswith("HugePages_") and integer or numKb for n in names]

# generate grammar using names and exprs lists
procMemGrammar = Dict(And([ procMemEntry(nam,expr) for nam,expr in
zip(names,exprs) ]))

# check grammar by parsing input string
pmData = procMemGrammar.parseString(procMemData)

# access pmData as a dict
for k in pmData.keys():
    print k,pmData[k]

# or create a standard Python dict from pmData
print dict(pmData)





From bdesth.quelquechose at free.quelquepart.fr  Mon Feb 13 21:47:51 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 14 Feb 2006 03:47:51 +0100
Subject: invert the order of a string
In-Reply-To: <dsr600$9sj$1@solaris.cc.vt.edu>
References: <dsr600$9sj$1@solaris.cc.vt.edu>
Message-ID: <43f1252e$0$1742$636a55ce@news.free.fr>

rtilley a ?crit :
> s = list('some_random_string')
> print s
> s.reverse()
> print s
> s = ''.join(s)
> print s
> 
> Surely there's a better way to do this, right?

print 'some_random_string'[::-1]


From tim at pollenation.net  Sun Feb 12 15:17:47 2006
From: tim at pollenation.net (Tim Parkin)
Date: Sun, 12 Feb 2006 20:17:47 +0000
Subject: Small newbie question
In-Reply-To: <1139774104.070375.235480@z14g2000cwz.googlegroups.com>
References: <1139774104.070375.235480@z14g2000cwz.googlegroups.com>
Message-ID: <43EF97EB.4000202@pollenation.net>

Byte wrote:
> How would I do this: Write a program that simply outputs a ramdom (in
> this case) name of (for this example) a Linux distibution. Heres the
> code ive tryed:
> 
> from random import uniform
> from time import sleep
> 
> x = 2
> while x < 5:
>     x = uniform(1, 5)
>     if x >= 1 <= 1.999: print 'SuSE'
>     elif x >= 2 <= 2.999: print 'Ubuntu'
>     elif x >= 3 <= 3.999: print 'Mandriva'
>     elif x >= 4 <= 4.999: print 'Fedora'
>     sleep(2)
> 
> It dosnt work: only keep printing SuSE. Please help,
> 
> Thanks in advance,
>  -- /usr/bin/byte
> 


import random
dist = ['suse','ubuntu','mandriva','fedora']
random.choice(dist)

is that ok?

Tim Parkin

[1] http://www.python.org/doc/lib/module-random.html


From draghuram at gmail.com  Mon Feb 27 09:53:41 2006
From: draghuram at gmail.com (draghuram at gmail.com)
Date: 27 Feb 2006 06:53:41 -0800
Subject: ImportError in Unpickle
In-Reply-To: <731302l1kqegn9nnt3ba73dlormigrhpo4@4ax.com>
References: <1140916392.357064.291290@t39g2000cwt.googlegroups.com>
	<8303025o795ogn175pdgoq7k2ahgqotnja@4ax.com>
	<731302l1kqegn9nnt3ba73dlormigrhpo4@4ax.com>
Message-ID: <1141052021.171928.20560@t39g2000cwt.googlegroups.com>


It is indeed the problem. Thanks.

May be, this fact could have been mentioned in the documentation. I
have suggested the change using bug tracker.

Raghu.



From vivainio at gmail.com  Fri Feb 17 10:18:06 2006
From: vivainio at gmail.com (vivainio at gmail.com)
Date: 17 Feb 2006 07:18:06 -0800
Subject: Evil, evil wxPython (and a glimmer of hope)
References: <1140116551.116322.12680@g43g2000cwa.googlegroups.com>
	<8764ned5ib.fsf@rose.polar.local>
	<1140162638.200378.199010@g44g2000cwa.googlegroups.com>
	<1140174946.948658.186160@g47g2000cwa.googlegroups.com>
	<1140180680.326797.69740@g43g2000cwa.googlegroups.com>
Message-ID: <1140189486.898380.245900@g14g2000cwa.googlegroups.com>

vivainio at gmail.com wrote:
> Fuzzyman wrote:
>
> > The code is relatively simple - so it would be easy to maintain the
> > parts you use if that was necessary. Certainly easier than duplicating
> > it yourself from scratch. :-)
>
> Sounds convincing, I'll give it a shot after all.

Ok, after brief eyeballing & experimenting, it appears that Wax is just
what I was looking for. The code is simple, concise and trivially
understandable, the level of wrapping seems about right, and examples
are helpful.

I'm glad I came whining about this in c.l.py instead of sucking it up
or switching toolkits altogether. :-)



From steve at REMOVETHIScyber.com.au  Thu Feb 16 16:49:42 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 17 Feb 2006 08:49:42 +1100
Subject: Merging two lists of data (Pythonic way)
References: <8k5Jf.27896$sA3.57@fed1read02>
Message-ID: <pan.2006.02.16.21.49.42.787432@REMOVETHIScyber.com.au>

On Thu, 16 Feb 2006 12:30:47 -0800, SMB wrote:

> I know I could do this with two for loops, but am looking for a better 
> solution maybe involving list comprehension.

What's wrong with for loops? Why do you think they are unPythonic?


-- 
Steven.



From peter at engcorp.com  Sun Feb  5 14:57:47 2006
From: peter at engcorp.com (Peter Hansen)
Date: Sun, 05 Feb 2006 14:57:47 -0500
Subject: How to create a unix shell account with Python?
In-Reply-To: <cd329af80602050934j639785a5u98b47f9358a13e79@mail.gmail.com>
References: <cd329af80602050934j639785a5u98b47f9358a13e79@mail.gmail.com>
Message-ID: <ds5lbj$b1b$1@sea.gmane.org>

Sebastjan Trepca wrote:
> I couldn't find anything on creating a new linux user account in
> Python documentation.
> Anyone has any experience with this? You just run useradd command in
> shell or is there a more pythonic way?

Just run useradd.



From duncan.booth at invalid.invalid  Mon Feb 13 16:25:35 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 13 Feb 2006 21:25:35 GMT
Subject: cyclic data structures
References: <Nc6If.1604$No6.38177@news.tufts.edu>
	<mailman.1858.1139863851.27775.python-list@python.org>
	<fu6If.1607$No6.37915@news.tufts.edu>
Message-ID: <Xns9769D817395EBduncanbooth@127.0.0.1>

John Salerno wrote:

> L.append(L) basically creates this, I think:
> 
> [1, 2, L]

Correct.
> 
> Now, assuming that's correct, and since L points to the list [1, 2],

wrong. You just said it yourself: L is now the list [1, 2, L]

> why 
> can't '[1, 2]' be substituted for the 'L' and then the list is closed?
> 
The append method modifies the list in place. The list which contained 1,2 
now has a third element which is a reference to itself.



From dausha at gmail.com  Fri Feb 10 14:17:11 2006
From: dausha at gmail.com (Ben Wilson)
Date: 10 Feb 2006 11:17:11 -0800
Subject: Newbie Q: dynamically assigning object attribute
In-Reply-To: <mqh*DvZ+q@news.chiark.greenend.org.uk>
References: <1139535715.486234.195690@g44g2000cwa.googlegroups.com>
	<mqh*DvZ+q@news.chiark.greenend.org.uk>
Message-ID: <1139599031.266642.9080@g47g2000cwa.googlegroups.com>

Well, my Perl way of doing it would be to have all attributes in a dict
(hash), then create the accessor vi a dynamic function. I knew Python
would have a right way to do it for Python, but when I went looking I
neglected to look at the core of the language. I suppose I'm just too
accustomed to the TIMTOWTDY approach to expect the
one-ring-to-bind-them-all solution. :-) It's a mental shift on my part,
to be certain.

What I was actually doing was reading a user configuration file and
setting an object's variables--the example I got was a fairly close
approximation of how I was trying to approach it before setattr().

Thanks,
Ben



From gerryrmail-goog at yahoo.com  Wed Feb 15 17:28:25 2006
From: gerryrmail-goog at yahoo.com (gr)
Date: 15 Feb 2006 14:28:25 -0800
Subject: Unable to get PIL to load jpeg images
References: <1139263113.552140.114100@o13g2000cwo.googlegroups.com>
	<1139315319.654694.285330@g43g2000cwa.googlegroups.com>
	<mailman.1545.1139316436.27775.python-list@python.org>
	<1139475569.693965.249700@o13g2000cwo.googlegroups.com>
Message-ID: <1140042505.720124.165250@f14g2000cwb.googlegroups.com>

Peter,

Can you share the name of the library on the Fedora distro?

thx,

gerry rodman
http://www.gerryrodman.com/


peter.mosley at talk21.com wrote:
> Thanks for that tip
>
> Following a dialogue in that discussion group it is now working.  The
> problem was that I didn't have the right jpeg library installed
> (although what I had was enough to show jpegs in gThumb, GIMP and the
> Gnome and KDE desktops so I don't understand why it wasn't). I had to
> also install a jpeg development library, which fortunately was
> available on my Fedora Core 3 installation disc.
>
> A final glitch was that the previous broken build interfered with the
> linking of PIL to the libraries.  I went for overkill, and deleted all
> the PIL installation and site-packages directories, then reinstalled
> from the original tarball.  This gave a curious glitch, in that the
> first time I ran it it failed to load Tkinter with some obscure error
> message, but on a retry everything was fine.  This worries me slightly,
> as I don't know what happened and there is always a chance it could
> happen again, but until it does I can't investigate it.
>
> Slightly off topic, but I think my experience here is typical of any
> installation on a Linux system, and illustrates why, despite huge
> improvements over the last few years, Linux is not yet really suitable
> for non expert use.
>
> Thanks to everyone who's helped me over the last few months.
> 
> Peter



From i5ex1rbkxp19gxl at jetable.net  Sun Feb 26 12:42:24 2006
From: i5ex1rbkxp19gxl at jetable.net (peleme)
Date: 26 Feb 2006 09:42:24 -0800
Subject: Coding Problem (arbitrary thread sych)
Message-ID: <1140975744.540285.45170@j33g2000cwa.googlegroups.com>

Hi,

Here is a code example to visualize my problem.

----------------------------------------------------------------------------------
import thread
import threading
from time import sleep

def a():
	print "exec a"
	sleep(1)

def b():
	print "exec b"
	sleep(4)

def c():
	print "exec c"
	sleep(3)

def d():
	print "exec d"
	sleep(2)

def e():
	print "exec e"
	sleep(2)

def s():
	print "exec s"
	# ...
	# code which synchronize the incoming three threads
	# ....
	print "in synch"


def main(sstr):
	nodes = sstr.split(",")
	print nodes
	for n in nodes:
		if n is "a":
			a()
		elif n is "b":
			b()
		elif n is "c":
			c()
		elif n is "d":
			d()
		elif n is "e":
			e()
		elif n is "s":
			s()
		else:
			print "unkown"


#A
threading.Thread(target=main, args=("b,c,s,e",)).start()
#B
threading.Thread(target=main, args=("c,s,e",)).start()
#C
threading.Thread(target=main, args=("s,e",)).start()
#D
threading.Thread(target=main, args=("c,e",)).start()
----------------------------------------------------------------------------------

The threads which arrives to the s function should wait for each other
until the last one. So A, B, and C executes the last function
'together', while D executes it seperate.
I only know that three threads have to be in synch.

I've been now spending a week on the problem.
The same problem should also be solved in C++. Buts thats another
issue. (Someone knows, too?)

Thanks,

Martin



From gdetre at gmail.com  Mon Feb 27 00:14:12 2006
From: gdetre at gmail.com (gdetre@princeton.edu)
Date: 26 Feb 2006 21:14:12 -0800
Subject: Unicode and MoinMoin
Message-ID: <1141017252.469296.139410@v46g2000cwv.googlegroups.com>

Dear all,

My lab has been using a Movable Type blog for internal communication
and announcement for a couple of years, but we've now seen the light
and I've set up a MoinMoin wiki. Everything's installed beautifully, so
I'm writing scripts to export all our Movable Type blog posts to wiki
pages. So far so good.

The only issue I'm having relates to Unicode. MoinMoin and python are
pretty unforgiving about files that contain Unicode characters that
aren't included in the coding properly. I've spent hours reading about
Unicode, and playing with different encoding/decoding commands, but at
this point, I just want a hacky solution that will ignore the
improperly coded characters or replace them with placeholders.

Can anyone recommend a simple surefire Unix/Python/Perl command that
will help me avoid errors like the one below? Any suggestions would be
hugely appreciated.

Thank you very much for your time,

Yours,
    Greg

----

'utf8' codec can't decode byte 0x96 in position 4910: unexpected code
byte

    * args = ('utf8', 'AUTHOR: blahblah\n\nTITLE: Reading Course
Readings... G. A. \x96 For references see blahblah.\n\n\n-----\n\n',
4910, 4911, 'unexpected code byte')
    * encoding = 'utf8'
    * end = 4911
    * object = 'AUTHOR: blahblah\n\nTITLE: Reading Course Readings...
G. A. \x96 For references see blahblah.\n\n\n-----\n\n'
    * reason = 'unexpected code byte'
    * start = 4910



From erniedude at gmail.com  Tue Feb  7 16:01:40 2006
From: erniedude at gmail.com (Ernesto)
Date: 7 Feb 2006 13:01:40 -0800
Subject: tricky regular expressions
Message-ID: <1139346100.491155.37570@z14g2000cwz.googlegroups.com>

I'm trying to get the right syntax for my regular expression.  The
string I'm trying to parse is:


# myString
[USELESS DATA]
Request: Play
[USELESS DATA]
Name:  David Dude
[USELESS DATA]
Request: Next
[USELESS DATA]
Name: Ernesto Python User
....

# Right now, I'm using the following code:

pattern_Name= '''(?x)
    Title:\s+(.+)
'''
names = re.findall(pattern_Name, myString)
print names

This captures all of the names, but I want an added requirement:
Only capture names which are followed (not necessarily immediately) by
"Request: Play" or "Request: Next".  I guess the regular expression
would look something like:

'''(?x)
    ["Request: Play" OR "Request: Next"][intermediate
data]Title:\s+(.+)
'''
I didn't see any RE constructs like this in the docs, but I have a
feeling it's possible.



From userprogoogle-139 at yahoo.co.uk  Tue Feb 14 14:15:26 2006
From: userprogoogle-139 at yahoo.co.uk (rodmc)
Date: 14 Feb 2006 11:15:26 -0800
Subject: Embedding an Application in a Web browser
References: <1139930045.408507.151440@g43g2000cwa.googlegroups.com>
	<1139932108.356041.155100@g14g2000cwa.googlegroups.com>
	<1139932674.447510.213520@o13g2000cwo.googlegroups.com>
Message-ID: <1139944525.979980.132740@o13g2000cwo.googlegroups.com>

Thanks for all the comments.

I will elaborate slightly to give everyone an idea of what is going on.
Basically I need to create a dynamic visualisation which sits in the
active desktop, basically behind the desktop icons and in front of the
windows wallpaper. Windows lets you define a web page which can be
displayed in this way. The application itself can sit on the local
users computer, rather than actually being downloaded via the web. It
will be retrieving data from a variety of sources. If there is another
way to do it then that would be good, for example writing another
active desktop application which people can use.

The user has to be able to resize, move or get rid of the visualisation
if they wish to do so.

Best,

rod



From exarkun at divmod.com  Fri Feb  3 13:24:48 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Fri, 3 Feb 2006 13:24:48 -0500
Subject: Another try at Python's selfishness
In-Reply-To: <1138985936.846079.233540@g14g2000cwa.googlegroups.com>
Message-ID: <20060203182448.2697.1764201096.divmod.quotient.6099@ohm>

On 3 Feb 2006 08:58:56 -0800, n.estner at gmx.de wrote:
>> ...
>> Unfortunately, none of this suggests that it's reasonable to have
>>
>> def x.y(z): ...
>>
>> mean the same as
>>
>> def y(x, z): ...
>
>Actually, it shouldn't. The idea was, that
>    def x.y(z): ...
>(explicitly) introduces an unbound method. That's not introducing a new
>conect to python, it's just making the difference between an unbound
>method and a not-bindable function explicit.
>
>Currently, "def(x,y): ..." can mean two different things: In the
>context of a class, it introduces an unbound method, in global or local
>contexts it introduces a function. I don't want to have a new syntax
>for that, I want two different syntaxes for these two different
>meanings.
>

Are you sure you actually understand what's going on?

    Python 2.4.2 (#2, Sep 30 2005, 21:19:01) 
    [GCC 4.0.2 20050808 (prerelease) (Ubuntu 4.0.1-4ubuntu8)] on linux2
    Type "help", "copyright", "credits" or "license" for more information.
    >>> def foo(): pass
    ... 
    >>> print type(foo)
    <type 'function'>
    >>> class bar:
    ...     def foo(self): pass
    ...     print type(foo)
    ... 
    <type 'function'>
    >>> print type(bar.foo)
    <type 'instancemethod'>

Jean-Paul


From steve at REMOVETHIScyber.com.au  Fri Feb  3 07:32:47 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 03 Feb 2006 23:32:47 +1100
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<drvd56$nb3$1@wake.carmen.se>
	<1138967463.440194.184710@g49g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.03.12.32.47.209717@REMOVETHIScyber.com.au>

On Fri, 03 Feb 2006 03:51:03 -0800, n.estner wrote:

> My alternative syntax suggestion would be this one:
> 
> class Pair:
>     def self.__init__(a,b):
>         self.a = a
>         self.b = b
> 
>     def self.sum():
>         return self.a + self.b
> 
>     def this.product ():
>         return this.a + this.b

This would be a fairly major change to Python, so I think we can say right
up front that the chances of this happening before Python 3 are zero, and
even in Python 3 the chances are about the same as the chances of Richard
Stallman suddenly announcing that he's taken a job for Microsoft writing
Digital Restrictions Management software.

But still, let's continue. After all, all you have to do is convince Guido
that this syntax is better...


>> You are really giving "self" a magic meaning with your suggestion
>> which isn't needed at all.
> 
> No. I hope this is clearer in the example above. "self" shouldn't be a
> keyword. 

Which it isn't now either.


> It's a special kind of argument now, so why shouldn't we
> explicitly _declare_ that it's a special kind of argument? (as explicit
> is better than implicit)

And a foolish consistency is the hobgoblin of little minds *wink*

[snip]

>   def x(self):
> declares two new identifiers, "x" and "self"
> 
> Why shouldn't
>   def self.x():
> declare two new identifiers ("x" and "self"), too?

Sure, but now the call foo.bar has special meaning inside a def statement
than elsewhere. Elsewhere, foo.bar is an attribute access, looking up
attribute bar in foo's namespace. Using your syntax, in a def statement
foo.bar is a pair of declarations: it declares a name "foo", and it
declares a second name "bar".

This inconsistency is, I think, worse than the implicit use of self.


-- 
Steven.



From steve at holdenweb.com  Wed Feb 15 23:15:14 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 15 Feb 2006 23:15:14 -0500
Subject: Is empty string cached?
In-Reply-To: <WCSIf.12038$MJ.252@fed1read07>
References: <cUMIf.11894$MJ.4803@fed1read07>	<mailman.1981.1140057796.27775.python-list@python.org>	<tgSIf.12036$MJ.8017@fed1read07>	<mailman.1982.1140061103.27775.python-list@python.org>
	<WCSIf.12038$MJ.252@fed1read07>
Message-ID: <dt0u8e$ghv$1@sea.gmane.org>

Farshid Lashkari wrote:
>>I really don't understand why it's so important: it's not a part of the 
>>language definition at all, and therefore whatever behavior you see is 
>>simply an artifact of the implementation you observe.
> 
> 
> I guess I should rephrase my question in the form of an example. Should 
> I assume that a new string object is created in each iteration of the 
> following loop?
> 
> for x in xrange(1000000):
>      func(x,'some string')
> 
> Or would it be better to do the following?
> 
> stringVal = 'some string'
> for x in xrange(1000000):
>      func(x,stringVal)
> 
> Or, like you stated, is it not important at all?
> 
It doesn't make a lot of difference:

  >>> import dis
  >>> print dis.dis.__doc__
Disassemble classes, methods, functions, or code.

     With no argument, disassemble the last traceback.


  >>> help(dis.dis)

  >>> dis.dis(compile("""\
  ... for x in xrange(1000000):
  ...      func(x,'some string')""", "", 'exec'))
   1           0 SETUP_LOOP              33 (to 36)
               3 LOAD_NAME                0 (xrange)
               6 LOAD_CONST               0 (1000000)
               9 CALL_FUNCTION            1
              12 GET_ITER
         >>   13 FOR_ITER                19 (to 35)
              16 STORE_NAME               1 (x)

   2          19 LOAD_NAME                2 (func)
              22 LOAD_NAME                1 (x)
              25 LOAD_CONST               1 ('some string')
              28 CALL_FUNCTION            2
              31 POP_TOP
              32 JUMP_ABSOLUTE           13
         >>   35 POP_BLOCK
         >>   36 LOAD_CONST               2 (None)
              39 RETURN_VALUE
  >>> dis.dis(compile("""\
  ... stringVal = 'some string'
  ... for x in xrange(1000000):
  ...      func(x,stringVal)""", "", 'exec'))
   1           0 LOAD_CONST               0 ('some string')
               3 STORE_NAME               0 (stringVal)

   2           6 SETUP_LOOP              33 (to 42)
               9 LOAD_NAME                1 (xrange)
              12 LOAD_CONST               1 (1000000)
              15 CALL_FUNCTION            1
              18 GET_ITER
         >>   19 FOR_ITER                19 (to 41)
              22 STORE_NAME               2 (x)

   3          25 LOAD_NAME                3 (func)
              28 LOAD_NAME                2 (x)
              31 LOAD_NAME                0 (stringVal)
              34 CALL_FUNCTION            2
              37 POP_TOP
              38 JUMP_ABSOLUTE           19
         >>   41 POP_BLOCK
         >>   42 LOAD_CONST               2 (None)
              45 RETURN_VALUE
  >>>

It just boils down to either a LOAD_CONST vs. a LOAD_NAME - either way 
the string isn't duplicated.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From martin at v.loewis.de  Sun Feb  5 13:51:39 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 05 Feb 2006 19:51:39 +0100
Subject: Compiling
In-Reply-To: <1139149306.188367.193770@g47g2000cwa.googlegroups.com>
References: <mailman.1387.1138986082.27775.python-list@python.org>
	<43e392d1$0$31853$626a54ce@news.free.fr>
	<mailman.1390.1138988111.27775.python-list@python.org>
	<43e3972f$0$624$626a14ce@news.free.fr>
	<1139149306.188367.193770@g47g2000cwa.googlegroups.com>
Message-ID: <43E6493B.2050503@v.loewis.de>

Ravi Teja wrote:
> This is a standard response to a rather frequent question here. But I
> am not sure I ever understood. Scheme / Lisp are about as dynamic as
> Python. Yet they have quite efficient native compilers. Ex: Bigloo
> Scheme.

You might be missing two details here:
1. those compilers are less efficient than you might think
2. Scheme/Lisp are indeed less dynamic than Python

Consider the following Scheme example:

(module a)

(define (add a b)
  (+ a b))

(print (add 3.0 4))

Bigloo generates the following code (which I have cleaned up
quite a bit):

/* toplevel-init */
obj_t BGl_toplevelzd2initzd2zzaz00()
{
  AN_OBJECT;
  obj_t BgL_arg1078z00_10;
  BgL_arg1078z00_10 = BGl_addz00zzaz00(((double)3.0), ((long)4));
  obj_t BgL_list1080z00_11;
  BgL_list1080z00_11 = MAKE_PAIR(BgL_arg1078z00_10, BNIL);
  return BGl_printz00zz__r4_output_6_10_3z00(BgL_list1080z00_11);
}

/* add */
obj_t BGl_addz00zzaz00(double BgL_az00_1, long BgL_bz00_2)
{
  AN_OBJECT;
  obj_t BgL_list1084z00_12;
  obj_t BgL_arg1087z00_13;
  BgL_arg1087z00_13 = MAKE_PAIR(BINT(BgL_bz00_2), BNIL);
  BgL_list1084z00_12 = MAKE_PAIR(DOUBLE_TO_REAL(BgL_az00_1),
				 BgL_arg1087z00_13);
  return BGl_zb2zb2zz__r4_numbers_6_5z00(BgL_list1084z00_12);
}


You can see several things from that:
1. The compiler was not able to/did not chose to implement
   the add operation using native C. Instead, it allocates
   two cons cells, and one object for the double; it then
   calls a generic implementation of +.
2. The compiler *did* infer that the procedure add is
   always called with (double long). This is because I
   didn't export it. If I exported the function, it
   would become

obj_t BGl_zc3anonymousza31077ze3z83zzaz00(obj_t BgL_envz00_16, obj_t
BgL_az00_17, obj_t BgL_bz00_18)
{
  AN_OBJECT;
  obj_t BgL_az00_8;obj_t BgL_bz00_9;
  BgL_az00_8 = BgL_az00_17;
  BgL_bz00_9 = BgL_bz00_18;
  obj_t BgL_list1079z00_11;
  obj_t BgL_arg1081z00_12;
  BgL_arg1081z00_12 = MAKE_PAIR(BgL_bz00_9, BNIL);
  BgL_list1079z00_11 = MAKE_PAIR(BgL_az00_8, BgL_arg1081z00_12);
  return BGl_zb2zb2zz__r4_numbers_6_5z00(BgL_list1079z00_11);
}

  In this case, all parameters are of type obj_t (which is a pointer
  type).

Furthermore, looking at the actual implementation of 2+, it is
defined as

(define (2+ x y)
   (2op + x y))

and then 2op is defined as

(define-macro (2op op x y)
   (let ((opfx (symbol-append op 'fx))
	 (opfl (symbol-append op 'fl))
	 (opelong (symbol-append op 'elong))
	 (opllong (symbol-append op 'llong)))
      `(cond
	  ((fixnum? ,x)
	   (cond
	      ((fixnum? ,y)
	       (,opfx ,x ,y))
	      ((flonum? ,y)
	       (,opfl (fixnum->flonum ,x) ,y))
	      ((elong? ,y)
	       (,opelong (fixnum->elong ,x) ,y))
	      ((llong? y)
	       (,opllong (fixnum->llong ,x) ,y))
	      (else
	       (error ,op "not a number" ,y))))
        ; more cases enumerating all possible
        ; combinations of fixnum, flonum, elong, and llong

Now, compare this with Python:

- In the general case of the add definition, the code Bigloo
  generates is roughly equivalent to the sequence of function calls
  the Python interpreter performs. For Python,

def add(a,b):
   return a+b

  translates into

  2           0 LOAD_FAST                0 (a)
              3 LOAD_FAST                1 (b)
              6 BINARY_ADD
              7 RETURN_VALUE
              8 LOAD_CONST               0 (None)
             11 RETURN_VALUE

  The entire work is done in BINARY_ADD: It allocates a tuple with
  the two arguments, then dispatches to the actual __add__
  implementation. Compared to the code Bigloo generates, this might
  be more efficient (a single memory allocation instead of two).

- the approach of collecting all implementations of + in a single
  place of Bigloo cannot be transfered to Python. Python's
  implementation of + is dynamically extensible.

- the approach of directly calling add() in the toplevel init
  cannot be applied to Python, either. The meaning of the name
  "add" can change between the time of definition and the actual
  call. Therefore, the simple function call must go through a
  table lookup.

So while it would be possible to apply the same strategy to
Python, it likely wouldn't gain any performance increase over
the interpreter.

Regards,
Martin


From g.brandl-nospam at gmx.net  Wed Feb 15 11:01:02 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Wed, 15 Feb 2006 17:01:02 +0100
Subject: Which is faster? (if not b in m) or (if m.count(b) > 0)
In-Reply-To: <pan.2006.02.15.12.14.46.964790@REMOVETHIScyber.com.au>
References: <1139976842.179801.285400@z14g2000cwz.googlegroups.com>
	<pan.2006.02.15.07.44.08.876338@gmx.net>
	<pan.2006.02.15.12.14.46.964790@REMOVETHIScyber.com.au>
Message-ID: <45h1huF6hks7U1@individual.net>

Steven D'Aprano wrote:
> On Wed, 15 Feb 2006 08:44:10 +0100, Marc 'BlackJack' Rintsch wrote:
> 
>> In <1139976842.179801.285400 at z14g2000cwz.googlegroups.com>, Farel wrote:
>> 
>>> Which is Faster in Python and Why?
>> 
>> ``if not b in m`` looks at each element of `m` until it finds `b` in it
>> and stops then.  Assuming `b` is in `m`, otherwise all elements of `m` are
>> "touched".
>> 
>> ``if m.count(b) > 0`` will always goes through all elements of `m` in the
>> `count()` method.
> 
> But the first technique executes in (relatively slow) pure Python, while
> the count method executes (relatively fast) C code. So even though count
> may do more work, it may do it faster.

Why does "not b in m" execute in pure Python? list.__contains__ is implemented
in C code as well as list.count.

Georg


From fredrik at pythonware.com  Wed Feb  1 12:10:09 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 1 Feb 2006 18:10:09 +0100
Subject: import datetime
References: <1138739342.436000.11290@g44g2000cwa.googlegroups.com><BgSDf.22171$wk5.19626@news02.roc.ny>
	<1138807764.118105.218190@g44g2000cwa.googlegroups.com>
Message-ID: <drqq1i$ig1$1@sea.gmane.org>

"shaboo" wrote:

> It does say Python 2.4.2
> ~~~~~~~~~~~~~~~~~~~~~~~~
> Python 2.4.2 (#2, Jan 30 2006, 20:02:09) [C] on hp-ux11
> Type "help", "copyright", "credits" or "license" for more information.
> >>>
> ~~~~~~~~~~~~~~~~~~~~~~~~
>
> I did look at the sys.path but the issue is that I dont see a module
> name datetime anywhere. Only datetime thing that is there is in include
> directory and it is datetime.h, which I think is for C interface. I
> have a python installed on my Windows desktop and it is working fine
> there. Where is the datetime module stored? Does any body know?

on windows, it's linked to the interpreter.

>>> import datetime
>>> datetime
<module 'datetime' (built-in)>

>>> import sys
>>> "datetime" in sys.builtin_module_names
True

on other platforms, it may be linked to the interpreter or placed in
a shared library:

>>> import datetime
>>> datetime
<module 'datetime' from '/usr/local/lib/python2.4/lib-dynload/datetime.so'>

</F>





From garabik-news-2005-05 at kassiopeia.juls.savba.sk  Thu Feb 16 06:48:31 2006
From: garabik-news-2005-05 at kassiopeia.juls.savba.sk (garabik-news-2005-05 at kassiopeia.juls.savba.sk)
Date: Thu, 16 Feb 2006 11:48:31 +0000 (UTC)
Subject: any ftpd written in python?
References: <mailman.1990.1140070096.27775.python-list@python.org>
Message-ID: <dt1oqf$2fvu$1@ns.felk.cvut.cz>

Kenneth Xie <mailinglist4ken at gmail.com> wrote:
> I need a simple ftpd example in pure python. Is there already such a 
> ftpd available?
> Thank you very much in advance.

self-advertising: http://melkor.dnp.fmph.uniba.sk/~garabik/pyftpd.html
it is a bit dated and I do not develop it anymore, but as a base of your
own server software it can be quite good.

-- 
 -----------------------------------------------------------
| Radovan Garab?k http://kassiopeia.juls.savba.sk/~garabik/ |
| __..--^^^--..__    garabik @ kassiopeia.juls.savba.sk     |
 -----------------------------------------------------------
Antivirus alert: file .signature infected by signature virus.
Hi! I'm a signature virus! Copy me into your signature file to help me spread!


From rabkin at mweb[DOT]co[DOT]za  Sat Feb 18 07:38:51 2006
From: rabkin at mweb[DOT]co[DOT]za (Max)
Date: Sat, 18 Feb 2006 14:38:51 +0200
Subject: Should we still be learning this?
Message-ID: <xuGdnQRiLabDiGrenZ2dnUVZ_tWdnZ2d@is.co.za>

On monday I start a semester course in Python (the alternative was 
Java). I was looking through the course outline and noticed the following:

1) UserDict is used. This is deprecated, right?
2) There is no mention of list comprehensions, but map and filter are 
taught early and then revisited later. I don't think this is good: list 
comprehensions are, IMO, one of Python's great features, Psyco prefers 
them, they're more pythonic, and map and filter seem to be going out the 
window for Python 3000.

What do you think?

--Max


From fanglicheng at gmail.com  Sun Feb 19 07:42:09 2006
From: fanglicheng at gmail.com (Licheng Fang)
Date: 19 Feb 2006 04:42:09 -0800
Subject: How to configure proxy authentication when using urllib2?
Message-ID: <1140352929.945363.279200@z14g2000cwz.googlegroups.com>

I use a HTTP proxy to connect to Internet. When I run ulropen command I
get HTTP Error 407: Proxy authorization required. Could anybody tell me
how to resolve this? Thanks!



From shreyasv at gmail.com  Tue Feb 21 18:44:42 2006
From: shreyasv at gmail.com (Shreyas)
Date: 21 Feb 2006 15:44:42 -0800
Subject: redirecting to a content page
Message-ID: <1140565482.106127.276650@z14g2000cwz.googlegroups.com>

I am a new user writing some scripts to store data entered via a
browser into a database.  I have several content pages, and one
"processing" page.  A content page often has a form like this:

<form method=POST action=processing.py>
<input type=text name=username>
...

And the processing page goes like this:

form = cgi.FieldStorage()
## do some work, put data into the db

The thing is, processing.py doesn't have any content that I want to
display to the user.  I would ideally like processing.py to seamlessly
send the user back to the content page that it came from, perhaps with
some parameter tweaks.

Instead, I am having to write intermediate steps like this into
processing.py:

Return to the <a href=contentPage.py?submit=true>page</a> you came
from.

Please let me know if there's a way to do this, or if my general
approach (having such a processing page) is off.

Thanks,

Shreyas

- I did try searching for this in the archive but am not even entirely
sure what it is called...



From chimaera29 at libero.it  Thu Feb  2 04:57:05 2006
From: chimaera29 at libero.it (sir_alex)
Date: 2 Feb 2006 01:57:05 -0800
Subject: Fromatting an xml file
Message-ID: <1138874224.989909.81620@z14g2000cwz.googlegroups.com>

Hi! I have a little problem writing xml files formatted in a way like
the following:

<rootnode>
         <node>bla</node>
         <node>bla</node>
</rootnode>

Every new node element should have a tabulation before it, but when I
use xml.dom.minidom I use writexml, which considers as a new node also
the text (in my little example, "bla" phrases), so the best result I
achieved has been the following

<rootnode>
        <node>
                 bla
        </node>
</rootnode>

but I don't want the text to be written on newlines... is there a good
solution? Thanks!



From mmarch at gmail.com  Mon Feb 27 04:11:57 2006
From: mmarch at gmail.com (Cowmix)
Date: 27 Feb 2006 01:11:57 -0800
Subject: Modifying body of select message in a 'mbox' file.
References: <1140852856.946605.281150@j33g2000cwa.googlegroups.com>
Message-ID: <1141031517.729353.158470@u72g2000cwu.googlegroups.com>

Well.. I hate to reply to my own post.. but here is an update..

When I flatten a 'mbox' mail message and suck it into a 'email' mail
message.. things look fine except that every MIME encoded section has a
'UNIX From' header added to the top of it.... and the From user is set
to 'nobody'..

Does anyone know why this 'From' header is added to every MIME encoded
section in the body?

thanks!



From peter at engcorp.com  Fri Feb 24 09:20:32 2006
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 24 Feb 2006 09:20:32 -0500
Subject: datetime iso8601 string input
In-Reply-To: <1140786439.054438.32080@u72g2000cwu.googlegroups.com>
References: <1140714826.044272.253460@t39g2000cwt.googlegroups.com>	<dtmjh7$97t$1@wake.carmen.se>
	<1140786439.054438.32080@u72g2000cwu.googlegroups.com>
Message-ID: <dtn4ng$tes$2@sea.gmane.org>

Rubic wrote:
> Thanks for your reply.  I wasn't clear in my
> prior post.  Rather than support the entire
> range of iso8601 formats, how about *just* the
> format that datetime emits?  Call it the
> parse_datetime() function.  Then it would be
> possible to take the output string of a datetime
> object and read it back in to round-trip the
> data.
> 
>     >>> now = str(datetime.datetime.now())
>     >>> now
>     '2006-02-24 06:58:23.737586'
>     >>> datetime.parse_datetime(now)
>     datetime.datetime(2006, 2, 24, 6, 58, 23, 737586)
> 
> Jeff Bauer
> Rubicon, Inc.

If that's truly all you want, then it's a near trivial function to 
write.  One of those "throw-away" functions you tend to whip up a few 
dozen times on every project, hardly noticing because you're using 
Python and it's so easy to do.

-Peter



From nid_oizo at yahoo.com_remove_the_  Tue Feb 28 15:17:36 2006
From: nid_oizo at yahoo.com_remove_the_ (Nicolas Fleury)
Date: Tue, 28 Feb 2006 15:17:36 -0500
Subject: Make staticmethod objects callable?
Message-ID: <Ad2Nf.2695$RM2.303150@news20.bellglobal.com>

Hi everyone,
I was wondering if it would make sense to make staticmethod objects 
callable, so that the following code would work:

class A:
     @staticmethod
     def foo(): pass
     bar = foo()

I understand staticmethod objects don't need to implement __call__ for 
their other use cases, but would it still make sense to implement 
__call__ for that specific use case?  Would it be error-prone in any way?

Thx and regards,
Nicolas


From aleaxit at yahoo.com  Thu Feb 16 23:24:18 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Thu, 16 Feb 2006 20:24:18 -0800
Subject: Mac OS X Installation Problem
References: <yEncExpress_Rulz!_www.techsono.com_3222994726@firstva.com>
Message-ID: <1havcjk.17gs3xigchjfsN%aleaxit@yahoo.com>

<Matt> wrote:

> Hi Everybody,
> 
> 1) Does OS X have a thing like the Add/Remove Programs control panel on
> Windows XP?

Nope.  You install stuff by running "packages" (installers) or dragging
.app "files" to Applications, uninstall it normally by dragging them to
Trash.


> My Tiger system had Python v2.3.5 on it and I threw the files in the trash and

Very unwise move -- now your fax functionality (which Apple implemented
using their own special system build of Python 2.3.5) is unlikely to
work, for example.

> installed v2.4.1, which is working fine as far as I can tell. However, when I
> type python at the command line, I get "command not found" so,
> 
> 2) How do I get OS X to recognize python at the command line?

Edit a ~/.bashrc file to add /usr/local/bin to your PATH.


Alex


From http  Mon Feb 27 20:10:22 2006
From: http (Paul Rubin)
Date: 27 Feb 2006 17:10:22 -0800
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<1141019214.153904.115220@j33g2000cwa.googlegroups.com>
	<zIwMf.9924$PR2.201420@twister2.libero.it>
	<877j7gz53k.fsf@rose.polar.local>
Message-ID: <7xd5h8jnk1.fsf@ruckus.brouhaha.com>

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:
> If an enumeration object were to be derived from, I would think it
> just as likely to want to have *fewer* values in the derived
> enumeration. Subclassing would not appear to offer a simple way to do
> that.

pentium_instructions = enum('add', 'sub', 'mul', ) # etc

athlon64_instructions = enum('add64', 'sub64', # etc
                             base_enum=pentium_instructions)

# 386 has no floating point unit
i386_instructions = enum(base_enum=pentium_instructions,
                         remove=('addf', 'subf', 'mulf',))  # etc


From rpdooling at gmail.com  Mon Feb 20 20:52:08 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 20 Feb 2006 17:52:08 -0800
Subject: Activestate python installation
References: <1140243666.990365.131220@f14g2000cwb.googlegroups.com>
Message-ID: <1140486728.787370.118460@g44g2000cwa.googlegroups.com>

Are you installing with an msi file from a logical drive other than C:?
If so, that's probably the trouble. Copy the msi file to C:\ and try it
from there.

rpd



From hancock at anansispaceworks.com  Wed Feb  1 20:09:03 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Wed, 1 Feb 2006 19:09:03 -0600
Subject: OO conventions
In-Reply-To: <5f56302b0602011440o47c07c4h3e2b0e4a1338e4fa@mail.gmail.com>
References: <5f56302b0602011440o47c07c4h3e2b0e4a1338e4fa@mail.gmail.com>
Message-ID: <20060201190903.738b97e4@samwise.anansi>

On Wed, 1 Feb 2006 23:40:37 +0100
Daniel Nogradi <nogradi at gmail.com> wrote:
> I'm relatively new to object oriented programming, so get
> confused about its usage once in a while. Suppose there is
> a class Image that has a number of methods, rotate, open,
> verify, read, close, etc. Then to use this class my
> natural guess would be to have something like
> 
> image = Image( )
> image.read( "myfile.jpg" )
> image.rotate( )
> image.close( )
> 
> But now it turns out that the PIL module uses this as
> 
> image = Image.open( "myfile.jpg" )
> image.verify( )
> image.rotate( )
> image.close( )

That's because that *isn't* object oriented.  PIL provides
an "open" *function* that opens a file containing an image
and *returns* an Image object.  The two "Image" usages are
not the same. I personally think he should've named the
module "Imaging" or something, to make this clearer, but you
can of course fix this in the import (I frequently have had
to call it PIL_Image or something, because of collisions
with other modules or objects named "Image").

What Lundh is modeling this on is not standard OOP thinking,
but rather the standard way of opening files in Python.

Or you could say he's using a "factory function".

I think it is actually not bad style, because in fact, he's
drawing attention to the fact that the image is NOT "an
object initialized by the string 'myfile.jpg'", but is
rather a function loading data from a file called
'myfile.jpg' and creating a PIL Image object from *that*.

Remember, programming is an art, not a science.
"Object-oriented style" is a subjective and fuzzy
aesthetic term, and what is "most clear" depends on what
you've seen before, and what you're trying to be clear
about.

Cheers,
Terry


-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From me at privacy.net  Tue Feb 14 14:32:23 2006
From: me at privacy.net (Charles)
Date: Tue, 14 Feb 2006 16:32:23 -0300
Subject: How can I find a freelance programmer?
Message-ID: <op.s4y9v9olix6gqv@charles>

Hello,

I am looking for a freelance Python programmer to create a cross-platform  
application with wxPython.
Any idea where I could find one?
Thanks,

-- 
Charles.
landemaine[at]gmail[dot]com


From reply.in.the.newsgroup at my.address.is.invalid  Wed Feb 15 12:14:48 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Wed, 15 Feb 2006 18:14:48 +0100
Subject: Embedding a binary file in a python script
References: <1140021879.698353.324230@o13g2000cwo.googlegroups.com>
	<mailman.1961.1140022989.27775.python-list@python.org>
	<1140023232.099718.264330@g14g2000cwa.googlegroups.com>
Message-ID: <abo6v1lpe1m2csjv0vu0k4mvtmg41oj9tm@4ax.com>

mrstephengross:
>Ok, this looks really cool, but can you explain a little more
>step-by-step what's going on? 

What happened to "Hey thanks, I'll look into that" :-(

-- 
Ren? Pijlman


From reply.in.the.newsgroup at my.address.is.invalid  Fri Feb  3 12:33:10 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Fri, 03 Feb 2006 18:33:10 +0100
Subject: Compiling
References: <mailman.1387.1138986082.27775.python-list@python.org>
Message-ID: <0t47u1lle7po0i9t1l7rh04g9092659sob@4ax.com>

Simon Faulkner:
>why hasn't someone written a compiler for Python?

http://www.python.org/doc/faq/general.html#can-python-be-compiled-to-machine-code-c-or-some-other-language

-- 
Ren? Pijlman


From jeff at schwabcenter.com  Wed Feb 22 19:10:02 2006
From: jeff at schwabcenter.com (Jeffrey Schwab)
Date: Thu, 23 Feb 2006 00:10:02 GMT
Subject: new wooden door step - fixing and finishing
In-Reply-To: <V17Lf.17308$915.16029@southeast.rr.com>
References: <1140598234.454510.281820@g14g2000cwa.googlegroups.com>
	<V17Lf.17308$915.16029@southeast.rr.com>
Message-ID: <u37Lf.17318$915.13867@southeast.rr.com>

Jeffrey Schwab wrote:
> jkn wrote:
> 
>> Hi all
>>     I'm considering having a go at replacing the wooden door step to
>> our back door. The original is loose and rotting.
>>
>> I'm sure some of this will be clearer when I remove the (metal) door
>> frame - how is such a step fixed? Vertical frame fixings?
> 
> 
> Depends on your layout manager.  Btw, you don't have to use Metal:  Java 
> frames support native L&F.
> 
>> Also, any suggestions for treating/finishing such an item, subject to
>> heavy use,
> 
> 
> Lots of unit testing.
> 
>> to prevent future rot?
> 
> 
> Good documentation, especially javadocs.
> 
>> I was wondering about treating it
>> wilth liberal amounts of Teak Oil or similar...
> 
> 
> Some people, when confronted with a problem, think "I know, I?ll use 
> Teak Oil."  Now they have two problems.

Forgot what group I was in.  Kindly replace any Java-specific witticisms 
with appropriately pythonic humor.


From free.condiments at gmail.com  Mon Feb 20 16:52:08 2006
From: free.condiments at gmail.com (Sam Pointon)
Date: 20 Feb 2006 13:52:08 -0800
Subject: getting started, .py file
In-Reply-To: <1140471172.783876.80400@g14g2000cwa.googlegroups.com>
References: <1140471172.783876.80400@g14g2000cwa.googlegroups.com>
Message-ID: <1140472328.241836.156460@g14g2000cwa.googlegroups.com>

python -i source_file.py
will do what you want.

 -Sam



From hancock at anansispaceworks.com  Thu Feb 23 12:35:23 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Thu, 23 Feb 2006 11:35:23 -0600
Subject: make a class instance from a string ?
In-Reply-To: <1140700945.689245.210160@z14g2000cwz.googlegroups.com>
References: <mailman.1955.1140018042.27775.python-announce-list@python.org>
	<mailman.2340.1140687820.27775.python-list@python.org>
	<1140700945.689245.210160@z14g2000cwz.googlegroups.com>
Message-ID: <20060223113523.731d2ef7@samwise.anansi>

On 23 Feb 2006 05:22:25 -0800
"Luke Plant" <luke.plant at gmail.com> wrote:
> In Python, classes are first class objects, so normally
> you would pass the class itself around, rather than use
> the names of classes.  Of course that might not be
> practical or applicable in your situation.

It is in fact, a particular source of annoyance when the
object is meant to be serialized to disk with pickle or
the like, and especially when it is an extension object.

A good idiom for "look me up in the source code after you
unpack me" is required. I think some things like ZODB
will already do that for you, but it seems basic enough
that there ought to be a general approved method of doing
that in Python -- you know, "one obvious way".

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com


From vercingetorix52 at yahoo.com  Tue Feb 28 14:28:12 2006
From: vercingetorix52 at yahoo.com (vercingetorix52 at yahoo.com)
Date: 28 Feb 2006 11:28:12 -0800
Subject: telnetlib problems
In-Reply-To: <1141153872.182746.289830@t39g2000cwt.googlegroups.com>
References: <1141153872.182746.289830@t39g2000cwt.googlegroups.com>
Message-ID: <1141154892.283296.37130@i39g2000cwa.googlegroups.com>

I just hit upon something that seems to work...

##########################
import telnetlib
from select import select

tn = telnetlib.Telnet('192.168.100.11')
sock = tn.get_socket()

tn.read_until('login: ', 5)
select([sock], [], [], 5)
tn.write('user\n')

tn.read_until('Password: ', 5)
select([sock], [], [], 5)
tn.write('password\n')

tn.read_until('bash-2.05$ ', 5)
tn.write('ls\n')
select([sock], [], [], 5)
print tn.read_very_eager()
##########################

If anyone sees any potential problems with this, I would appreciate it.
 TIA



From mclaugb at nospm.yahoo.com  Mon Feb  6 09:34:50 2006
From: mclaugb at nospm.yahoo.com (mclaugb)
Date: Mon, 6 Feb 2006 14:34:50 -0000
Subject: Scientific Computing with NumPy
References: <ds7bvh$ab1$2@gemini.csx.cam.ac.uk>
	<mailman.1482.1139225595.27775.python-list@python.org>
	<ds7ch4$bj7$1@gemini.csx.cam.ac.uk>
	<1139229403.024321.215780@o13g2000cwo.googlegroups.com>
Message-ID: <ds7mrb$443$1@gemini.csx.cam.ac.uk>

Is Scipy the same thing as ScientificPython?
I am confused if SciPy is just the new version.  they appear to be separate 
things.
Bryan

"Brendan" <spam4bsimons at yahoo.ca> wrote in message 
news:1139229403.024321.215780 at o13g2000cwo.googlegroups.com...
> As of version 0.4.x, Scipy exclusively uses the newer NumPy module
> instead of the older Numeric module.  The confusion is inevitable in
> this time of transition, but their intent is to standardize on one
> array package.
>
> Brendan
> --
> Brendan Simons
>
>
>
> mclaugb wrote:
>> This page documents the differences.  It seems that NumPy is supported 
>> and
>> more recent.
>> http://numeric.scipy.org/
>>
>>
>> "linda.s" <samrobertsmith at gmail.com> wrote in message
>> news:mailman.1482.1139225595.27775.python-list at python.org...
>> On 2/6/06, mclaugb <mclaugb at nospm.yahoo.com> wrote:
>> > Has anyone recompiled the Scientific Computing package using NumPy 
>> > instead
>> > of Numeric?
>> > I need a least squares algorithm and a Newton Rhaphson algorithm which 
>> > is
>> > contained in Numeric but all the documentation out there says that 
>> > Numeric
>> > is crap and all code should be using NumPy.
>> > Thanks,
>> > Bryan
>> what is the relationship between Numeric and Numpy?
> 




From bokr at oz.net  Tue Feb  7 10:06:49 2006
From: bokr at oz.net (Bengt Richter)
Date: Tue, 07 Feb 2006 15:06:49 GMT
Subject: Literal Escaped Octets
References: <pan.2006.02.06.04.50.15.325558@hotmail.com>
Message-ID: <43e8b3e8.175976661@news.oz.net>

On Mon, 06 Feb 2006 04:40:31 GMT, Chason Hayes <chasonh at hotmail.com> wrote:

>I am trying to convert raw binary data to data with escaped octets in
>order to store it in a bytea field on postgresql server. I could do this
>easily in c/c++ but I need to do it in python. I am not sure how to read
>and evaluate the binary value of a byte in a long string when it is a non
>printable ascii value in python. I read some ways to use unpack from the
>struct module, but i really couldn't understand where that would help. I
>looked at the MIMIEncode module but I don't know how to convert the object
>to a string. Is there a module that will convert the data? It seems to me
>that this question must have been answered a million times before but I
>can't find anything.
>
Have you considered just encoding the data as text in hex or base64, e.g.,

 >>> import binascii
 >>> s = '\x00\x01\x02\x03ABCD0123'
 >>> binascii.hexlify(s)
 '000102034142434430313233'
 >>> binascii.b2a_base64(s)
 'AAECA0FCQ0QwMTIz\n'

which is also reversible later of course:
 >>> h = binascii.hexlify(s)
 >>> binascii.unhexlify(h)
 '\x00\x01\x02\x03ABCD0123'
 >>> b64 = binascii.b2a_base64(s)
 >>> binascii.a2b_base64(b64)
 '\x00\x01\x02\x03ABCD0123'

Regards,
Bengt Richter


From ivoras at __-fer.hr-__  Wed Feb 15 05:58:54 2006
From: ivoras at __-fer.hr-__ (Ivan Voras)
Date: Wed, 15 Feb 2006 11:58:54 +0100
Subject: Pythonic gui format?
In-Reply-To: <dsr1pf$egj$1@daisy.noc.ucla.edu>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<dsqocq$dcq$1@bagan.srce.hr> <dsr1pf$egj$1@daisy.noc.ucla.edu>
Message-ID: <dsv1hd$3bv$1@bagan.srce.hr>

James Stroud wrote:

> The reasons given in the blog were fairly precise. I think "only on 
> vague[...]" is misleading here. The idea of the article was to educate a 
> Java user how to change his or her frame of reference to better use Python.
> 
> The author was not being territorial as you are implying.

What triggered me is the presence of lots of absolute statements like 
"XML is not the answer. It is not even the question.", "In Python, XML 
is something you use for interoperability, not your core functionality, 
because you simply don't need it for that." and similar. Though the 
author says at the end "There are also other, very rare, architectural 
reasons to need XML" he then proceeds to say "Trust me, they don't apply 
to your app." instead of educating the reader what they are and make him 
conclude that for himself. The article is actually quite good, but in 
this particular section the author doesn't explain his advices well. 
Personally, I the approach "X is good because of Y, except when Z and W, 
when it's the other way around" better, since IRL it's always so.

Mentioning (again, not explaining!) LISP to state XML is laughable is 
kind of lame, especially since the focus of the article are Python and Java.

Again, it's good, but I'd like more explanations and conditionals in 
that paragraph :)


From larry.bates at websafe.com  Wed Feb 22 17:59:50 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Wed, 22 Feb 2006 16:59:50 -0600
Subject: DatBases and Pickle Module
In-Reply-To: <mailman.2312.1140641875.27775.python-list@python.org>
References: <mailman.2312.1140641875.27775.python-list@python.org>
Message-ID: <43FCECE6.7060400@websafe.com>

Math wrote:
> Hello,
> 
> I wonder if someone can help me out.
> My native is Dutch, sorry for this....
> 
> But I am writing this program, a program which uses Relational DataBase
> for saving all kinds of information in records.
> Now I saw another application which stores all kind of identical data in
> plain files, but without any kind of DBMS.
> I wonder how they did this?
> It also seems alot faster then when working with DBMS.
> Can I achieve the same in Python with say..the pickle module.
> For instance a dictionary or something else?
> 
> Many thanks to you all
> Math

Using a database is good when you want to access data based on
indexes or if you wish to have 1-n relationships between tables.
Plain files don't handle this very well.  If all you want to do
is store raw data and get it back, look at pickle and shelve
modules.  They are very fast.

-Larry Bates



From strombrg at dcs.nac.uci.edu  Thu Feb 16 22:19:01 2006
From: strombrg at dcs.nac.uci.edu (Dan Stromberg)
Date: Fri, 17 Feb 2006 03:19:01 GMT
Subject: Databases and python
References: <pan.2006.02.14.08.06.18.754312@dcs.nac.uci.edu>
	<gtf8v1dmu147otntn4ghm9biavq01feuhr@4ax.com>
Message-ID: <pan.2006.02.17.03.22.11.928784@dcs.nac.uci.edu>

On Thu, 16 Feb 2006 10:09:42 +0100, Rene Pijlman wrote:

> Dan Stromberg:
>>is there a python database interface that would allow me to define a 
>>-lot- of tables?  Like, each word becomes a table, and then the fields 
>>in that table are just the filenames that contained that word.
> 
> Give ZODB a try. 
> http://www.zope.org/Wikis/ZODB/FrontPage
> http://www.python.org/workshops/2000-01/proceedings/papers/fulton/zodb3.html

Aside from object persistence, what would this add for me?

Is each object saved in a separate file, or are they bunched together into
one or more files?

> My first attempt would be: a BTree with the word as key, and a 'list of
> filenames' as value.
> http://www.zope.org/Wikis/ZODB/FrontPage/guide/node6.html#SECTION000630000000000000000

This is basically what I'm doing now, except the most recently used "lists
of filenames" are kept in RAM to avoid going from "on disk string" to "in
memory list" to "on disk string" quite as much.



From jeremy+complangpython at jeremysanders.net  Fri Feb 24 04:56:46 2006
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Fri, 24 Feb 2006 09:56:46 +0000
Subject: ls files --> list packer
References: <1140765792.864556.289820@i40g2000cwc.googlegroups.com>
	<1140767111.490691.42460@e56g2000cwe.googlegroups.com>
Message-ID: <dtml8u$1vh$1@gemini.csx.cam.ac.uk>

I V wrote:

> snd_filelist = [f for f in os.listdir('/snd/Public/') if
> f.endswith('.aiff')]

Or even

from glob import glob

snd_filelist = glob('/snd/Public/*.aiff')

Jeremy

-- 
Jeremy Sanders
http://www.jeremysanders.net/


From rtilley at vt.edu  Wed Feb  8 08:27:15 2006
From: rtilley at vt.edu (rtilley)
Date: Wed, 08 Feb 2006 08:27:15 -0500
Subject: os.walk() dirs and files
Message-ID: <dscrjr$joa$1@solaris.cc.vt.edu>

Hello,

When working with file and dir info recursively on Windows XP. I'm going 
about it like this:

for root, dirs, files in os.walk(path):
     for f in files:
         ADD F to dictionary
     for d in dirs:
         ADD D to dictionary

Is it possible to do something such as this:

for root, dirs, files in os.walk(path):
     for f,d in files, dirs:
         ADD F|D to dictionary

Just trying to save some lines of code and thought it wise to ask the 
gurus before trying it :)

Thanks!


From ian at excess.org  Thu Feb  9 09:38:21 2006
From: ian at excess.org (Ian Ward)
Date: Thu, 09 Feb 2006 09:38:21 -0500
Subject: cursesw+setlocale fixes it! (was: Re: Problem with curses and UTF-8)
In-Reply-To: <1139446935.221566.287710@g43g2000cwa.googlegroups.com>
References: <mailman.1566.1139345769.27775.python-list@python.org>
	<43E9234B.6030108@v.loewis.de> <11ujl0hof3fql62@corp.supernews.com>
	<mailman.1617.1139425534.27775.python-list@python.org>
	<43EA6238.6040004@v.loewis.de>
	<mailman.1631.1139438813.27775.python-list@python.org>
	<1139446935.221566.287710@g43g2000cwa.googlegroups.com>
Message-ID: <43EB53DD.1030404@excess.org>

Damjan wrote:
> import curses, locale
> locale.setlocale(locale.LC_ALL, '')
> s = curses.initscr()

Hey, that works for me.  Combined characters and wide characters are 
working too.

Now the real problem.. how do I convince the python higher-ups to link 
against cursesw by default?

At the very least all distros that use UTF-8 as their default encoding 
should switch to cursesw.

Ian Ward



From kent at kentsjohnson.com  Wed Feb 22 09:21:50 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Wed, 22 Feb 2006 09:21:50 -0500
Subject: Python CGI not working in Firefox but does in IE
In-Reply-To: <1140615651.847586.258300@f14g2000cwb.googlegroups.com>
References: <1140615651.847586.258300@f14g2000cwb.googlegroups.com>
Message-ID: <43fc6efa$1_2@newspeer2.tds.net>

Harlin Seritt wrote:
> Also, is there a redirect command somewhere within Python CGI that can
> get this done instead as I would actually prefer to have the CGI code
> execute this rather than depend on the HTML to do it.

http://groups.google.com/group/comp.lang.python/msg/6e929fab0d414b2c 
shows how do do a redirect with HTTP headers.

Kent


From wmmeyer at gmail.com  Tue Feb 28 11:26:52 2006
From: wmmeyer at gmail.com (William Meyer)
Date: Tue, 28 Feb 2006 16:26:52 +0000 (UTC)
Subject: comple list slices
References: <mailman.2516.1141136527.27775.python-list@python.org>
	<1141140546.854493.183320@v46g2000cwv.googlegroups.com>
Message-ID: <loom.20060228T170753-806@post.gmane.org>

 <shandy.b <at> gmail.com> writes:

> 
> A couple questions:
> 
> 1- what is j?
> 2- what does the rows[x][y] object look like?  I assume it's a dict
> that has a "rowspan" key.  Can rows[x][y]["rowspan"] sometimes be 0?
> 
> Perhaps you're looking for something like this:
> rowgroups = []
> rowspan = 0
> for i in range( len(rows) ):
>     if rowspan <= 0:
>         rowspan = rows[j][0]["rowspan"]
>         if rowspan == 0:
>             rowspan = 1
> 
>         rowgroups.append(rows[ i : i + rowspan ])
> 
>     rowspan -= 1
> 
> -sjbrown
> 

oops, typo
row[j] should be i
that line should read:
    rowspan = i[0]["rowspan"]

rows is a list of lists which contains td tag objects from beautifulsoup.
rowspan is a tag attribute. You solution is clearer then mine, but the approach
is the same. Is there finer grained control of loops in python? (or in a perfect
world a way to group rows this way with list comprehensions?)

Rowspan can be none, meaning 1, and it can be zero. Zero means the row extends
from the current cell until the end of the table. That isnt used much, and not
in the table I am scraping at all.






From bradfordh at gmail.com  Tue Feb 14 21:05:37 2006
From: bradfordh at gmail.com (Tempo)
Date: 14 Feb 2006 18:05:37 -0800
Subject: Python and ASP
In-Reply-To: <1139968235_9917@sp6iad.superfeed.net>
References: <1139958137.733403.33640@g44g2000cwa.googlegroups.com>
	<1139961021_9771@sp6iad.superfeed.net>
	<1139967580.352137.246320@f14g2000cwb.googlegroups.com>
	<1139968235_9917@sp6iad.superfeed.net>
Message-ID: <1139969137.852649.19580@f14g2000cwb.googlegroups.com>

What do you mean? I can't just upload the file to the server that is
going to host my site?



From peter at engcorp.com  Mon Feb 13 10:59:21 2006
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 13 Feb 2006 10:59:21 -0500
Subject: Is python very slow compared to C
In-Reply-To: <6483a07172cad4052d478999d11db730@gmail.com>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>	<1139754010.067582.214830@z14g2000cwz.googlegroups.com>	<pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>	<mailman.1785.1139762698.27775.python-list@python.org>	<pan.2006.02.12.17.18.50.356928@REMOVETHIScyber.com.au>	<1139793721.739325.235780@z14g2000cwz.googlegroups.com>	<43F01749.2000601@REMOVEMEcyber.com.au>	<1139809484.447810.17000@g44g2000cwa.googlegroups.com>
	<6483a07172cad4052d478999d11db730@gmail.com>
Message-ID: <dsqacu$jj3$1@sea.gmane.org>

PA wrote:
> On Feb 13, 2006, at 06:44, bonono at gmail.com wrote:
> 
> 
>>And if we use market penetration as measure, Perl seems to be easier
>>for people ?
> 
> 
> Perl: Shell scripts/awk/sed are not enough like programming languages.
> 
> Python: Perl is a kludge.
> 
> "What Languages Fix"
> http://www.paulgraham.com/fix.html

Cute.  He's missing Assembly language though:

Assembly language: My fingers are numb.

;-)



From locoyfeo at gmail.com  Mon Feb 20 16:07:34 2006
From: locoyfeo at gmail.com (El Loco)
Date: 20 Feb 2006 13:07:34 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<yfspsljp321.fsf@oc.ex.ac.uk>
	<1140441519.702761.326130@g14g2000cwa.googlegroups.com>
Message-ID: <1140469654.757343.74750@o13g2000cwo.googlegroups.com>

Kay Schluehr wrote:
> Yes, it's Guidos master-plan to lock programmers into a slow language
> in order to dominate them for decades. Do you also believe that Al
> Quaida is a phantom organization of the CIA founded by neocons in the
> early '90s who planned to invade Iraq?

Actually, it was created by Bruce Lee, which is not dead but working
undercover for the Hong Kong police to fight against the chinese
triads. At this point you might guess what does Bruce Lee have to do
with Al Qaida? Well my friend, if you don't understand this, you don't
get it at all! (Hint: he's a c++ hacker who wanted to build a tracking
system for terrorists in middle east, but the project got halted when
Guido Van Rossum, who's real name is Abdul Al Wazari, convinced him to
use python). Now the system is so so slow that Ben Laden never gets
caught!

El Loco



From aleaxit at yahoo.com  Tue Feb 21 00:47:53 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 20 Feb 2006 21:47:53 -0800
Subject: number ranges
References: <e86a5fd00602131854s73191cbbu742d4434ad074908@mail.gmail.com>
	<1139945386.3346.38.camel@pc1.cole.uklinux.net>
	<43F8D881.5030804@sympatico.ca>
	<gfmdnZrrLeHK22TenZ2dnUVZ_tCdnZ2d@comcast.com>
	<43F97AA8.50005@REMOVEMEcyber.com.au>
	<3_WdnUP9qr9XRmTenZ2dnUVZ_sydnZ2d@comcast.com>
	<1hb1umb.wr2hsk1chby86N%aleaxit@yahoo.com>
	<NMuKf.5613$%14.252734@news20.bellglobal.com>
Message-ID: <1hb2uq1.e7kdkt1z0ge4rN%aleaxit@yahoo.com>

Colin J. Williams <cjw at sympatico.ca> wrote:
   ...
> >>I am also open to such arguments but it will be tough to convince me
> >>that "x to y" should mean something different from what it means in
> >>Pascal, BASIC, and English.
   ...
> 1. Why not treat '2 to 5' or '(2 to 5)' as a semi-open interval?

Reread the part I quoted above: at least some of the proponents of this
syntax appear to be totally ignorant of 30 years of literature and
practice of programming, "it will be tough to convince" them that closed
intervals are a terrible mistake and semi-open ones the only way to go.
Introducing a new syntax, with semantics that "don't convince" some of
its prominent proponents, would be self-destructive (I shudder just to
think of the amount of time and energy we'd all be spending dealing with
whines about it); Python is clearly much better off if such people run
away to Ruby, with its (expletive deleted) a..b AND a...b syntaxes just
to ensure maximum confusion;-).

> 2. How could a stride be included in this notation?

The natural way would be (x to y by z), I think.


Alex


From fredrik at pythonware.com  Mon Feb 13 13:33:15 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Feb 2006 19:33:15 +0100
Subject: FTPlib
References: <1139842605.976288.243880@g14g2000cwa.googlegroups.com>
Message-ID: <dsqjdd$ska$1@sea.gmane.org>

Harlin Seritt wrote:

> Using ftplib from Python I am trying to get all files in a particular
> directory using ftplib and then send those same files to another ftp
> server. I have tried using commands like 'get *' and 'mget *' with no
> success.
>
> I am using the following:
>
> srcFtp = FTP(srcHost)
> srcFtp.login(srcUser, srcPass)
> srcDir = srcFtp.nlst('.')
> for file in srcDir:
>     print file[2:]
>     srcFtp.transfercmd('get '+file[2:])
>
> I've verified that I do have a connection with the ftp server and the
> files as 'file[2:]' are indeed the file names.
>
> Anyone know why I get the following error?
>
> podcast-1.mp3
> Traceback (most recent call last):
>   File "podsync.py", line 17, in ?
>     srcFtp.transfercmd('get '+file[2:])
>   File "C:\Python24\lib\ftplib.py", line 345, in transfercmd
>     return self.ntransfercmd(cmd, rest)[0]
>   File "C:\Python24\lib\ftplib.py", line 327, in ntransfercmd
>     resp = self.sendcmd(cmd)
>   File "C:\Python24\lib\ftplib.py", line 241, in sendcmd
>     return self.getresp()
>   File "C:\Python24\lib\ftplib.py", line 216, in getresp
>     raise error_perm, resp
> ftplib.error_perm: 500 Syntax error, command unrecognized.

ftplib works with FTP protocol commands, not ftp client commands (such
as get and mget).

to read data from a remote server, you can use something like:

    dst = open(localfile, "wb")
    srcFtp.retrbinary("RETR " + file[2:], dst.write)
    dst.close()

for more examples, see

    http://effbot.org/librarybook/ftplib.htm

for an extensive description of FTP-as-deployed, see daniel bernstein's
site:

    http://cr.yp.to/ftp.html

hope this helps!

</F>





From FASTedob at XXhomemail.YEScom.OZau  Sun Feb 12 11:32:56 2006
From: FASTedob at XXhomemail.YEScom.OZau (Eddie)
Date: Sun, 12 Feb 2006 16:32:56 GMT
Subject: RPy / R
In-Reply-To: <hNoGf.33$lw5.5@fe03.lga>
References: <kiWFf.507$U35.88@fe02.lga> <43e99d61@news.comindico.com.au>
	<hNoGf.33$lw5.5@fe03.lga>
Message-ID: <43ef6337$1@news.comindico.com.au>

R = 2.2.1
Rpy = rpy-0.4.6-R-2.0.0-to-2.2.1-py24.win32.exe
Active Python = ActivePython-2.4.2.10-win32-x86.msi
Numeric = Numeric-24.2.win32-py2.4.exe
NumPy = numpy-0.9.4.win32-py2.4.exe
I don't believe I have installed SciPy

The Numeric and NumPy differences are explained at http://numeric.scipy.org/

Eddie


jason wrote:
> Thanks for your response. I'll try to install all the same versions that you 
> have.
> 
> I have removed my version of Python and installed ActivePython 
> (ActivePython-2.4.2.10-win32-x86.msi).
> 
> Could you please tell me which versions of the following you have installed:
> NumPy
> SciPy
> RPy
> R
> 
> I have not installed Numeric. Is that different from NumPy? If so, which 
> version do you have?
> 
> Thanks.
> 
> "Eddie" <FASTedob at XXhomemail.YEScom.OZau> wrote in message 
> news:43e99d61 at news.comindico.com.au...
> 
>>Hi Jason
>>
>>I had more success, being able to run a few test programs.
>>Not sure why yours would be crashing - I have a similar setup (Win XP SP2 
>>with all updates) - my version of Python is the Activestate download 
>>(ActivePython-2.4.2.10-win32-x86.msi). Have you installed Numeric?
>>If all else fails might be worth trying to unistall Python and installing 
>>the Activestate version (which includes the Win32 extensions).
>>
>>Good luck
>>
>>Eddie
>>
>>jason wrote:
>>
>>>Hello:
>>>
>>>I installed the following:
>>>
>>>python-2.4.2.msi
>>>pywin32-207.win32-py2.4.exe
>>>R-2.2.1-win32.exe
>>>rpy-0.4.6-R-2.0.0-to-2.2.1-py24.win32.exe
>>>
>>>on a Windows XP (SP2) box.
>>>
>>>[SNIP]
>>>
>>>Is this a setup issue? Thanks for your help.
>>>
> 
> 


From fredrik at pythonware.com  Wed Feb  1 11:45:01 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 1 Feb 2006 17:45:01 +0100
Subject: urllib2 - My POST Request just isn't working right
References: <312cfe2b0602010753uc363a85wb3f87cf2677993a2@mail.gmail.com><mailman.1317.1138810288.27775.python-list@python.org><1138810726.547315.82890@f14g2000cwb.googlegroups.com>
	<312cfe2b0602010833j29f59563i90e62145e6829d33@mail.gmail.com>
Message-ID: <drqoif$b8c$1@sea.gmane.org>

Gregory Pi?ero wrote:

> 1 . One thing that is weird is that the data part just says "Your
> FedEx Transaction".  I know I put the XML here, but I also notice that
> urllib2 is putting this as:
>
> request=<xml ....
>
> Can I have my xml placed here without that something= part?  That
> don't specify what parameter name I should use.

you told it to do that:

    values = {'request':xml_request}
    data = urllib.urlencode(values)

so if you don't want it, all you have to do is to pass in the transaction
xml instead of the urlencoded form data:

    req = urllib2.Request(FedEx_API_URL, xml_request, headers)

> 2. urllib2 seems to create my request with \n\r line endings.  Should
> it maybe just be \n?  And if so, how to change that?

"\r\n", more likely.  and that's how things should be.

</F>





From graham.abbott at gmail.com  Wed Feb 15 22:00:30 2006
From: graham.abbott at gmail.com (Graham)
Date: 15 Feb 2006 19:00:30 -0800
Subject: Safe Python Execution
Message-ID: <1140058830.477028.26620@f14g2000cwb.googlegroups.com>

I've been messing around with trying to get a small sandbox like
environment where i could execute python code in a "safe" way.
Basically what the old restricted execution module attempted to do.
I've written a small amount of code to get custom interpreter running,
but i'm not really sure if its safe.

The way i'm controlling functionality is with some games and exec, so
if 'code' was the text code you wanted to execute i run:

exec code in {'__builtins__':None"}

obviously this doesn't give you much to play with, but it does remove
file access and importing as far as i can tell. Can anyone think of a
hack around this? I assume if it was this easy it would be a module
already but i figured i would ask.

Graham.



From fakeaddress at nowhere.org  Mon Feb  6 14:32:44 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Mon, 06 Feb 2006 19:32:44 GMT
Subject: threads and memory
In-Reply-To: <mailman.1500.1139245971.27775.python-list@python.org>
References: <mailman.1500.1139245971.27775.python-list@python.org>
Message-ID: <wvNFf.30450$H71.28880@newssvr13.news.prodigy.com>

Lee Leahu wrote:
> I am trying to write a simple threaded application which will
 > simulate 1000 connections to a remote service in order to
 > stress test" that the remote service can handle that many
 > connections.

That shouldn't be a problem on a modern OS, but there are
still quite a few not-up-to-speed systems in the field that
choke on just a few hundred threads. There are also many
systems with modern threading that choke because they are
poorly configured by default.

> However, I have encountered the following error after I
 > have started my 381st thread:

[...]
> I have 1.5GB of total ram in my computer, as evident by the
 > command 'free':
[...]
> NOTE the line that reads 'ENOMEM (Cannot allocate memory).

The error message may be misleading. The limiting factor on
the number of threads is usually address space, not physical
memory. You can get ENOMEM when the system cannon allocate
stack space for a thread. The space it needs is not RAM,
nor even RAM+swap; it's pure virtual address space.

Look up how to set the stack-space for threads on your
system. A reasonable size on a 32-bit system is 2MB to
4MB. Then you should be able to create threads numbering
in the low thousands. (On 64-bit systems, the issue just
goes away.)


-- 
--Bryan


From tuka at yorn.net  Fri Feb  3 17:46:40 2006
From: tuka at yorn.net (tuka)
Date: 3 Feb 2006 14:46:40 -0800
Subject: import numeric crashes python.exe
Message-ID: <1139006800.467868.11310@o13g2000cwo.googlegroups.com>

Hi all,

I have been trying import numeric (from numpy install) and each time it
crashes python.exe on windows XP. I am runing python2.4.2 and have used
the original distribution and an activestate distribution with no
difference in result.

Has anyone been having the same problem ? Is there a possible solution
to this ?

TIA,
Tuka



From steven.bethard at gmail.com  Tue Feb 28 16:57:46 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 28 Feb 2006 14:57:46 -0700
Subject: Make staticmethod objects callable?
In-Reply-To: <Ad2Nf.2695$RM2.303150@news20.bellglobal.com>
References: <Ad2Nf.2695$RM2.303150@news20.bellglobal.com>
Message-ID: <goqdnTRMGvPFWpnZ4p2dnA@comcast.com>

Nicolas Fleury wrote:
> I was wondering if it would make sense to make staticmethod objects 
> callable, so that the following code would work:
> 
> class A:
>     @staticmethod
>     def foo(): pass
>     bar = foo()

Do you have a real-world use case?  I pretty much never use 
staticmethods (preferring instead to use module-level functions) so I'm 
having a hard time coming up with some code where this would be really 
useful.  I'm also a little wary of breaking the parallel between 
classmethod and staticmethod which are currently *just* descriptors 
(without any other special functionality).

Maybe instead of making just staticmethods callable, both staticmethods 
and classmethods could gain an 'im_func' attribute like bound and 
unbound methods have?

STeVe


From steven.bethard at gmail.com  Thu Feb  9 21:44:16 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 09 Feb 2006 19:44:16 -0700
Subject: super(...).__init__() vs Base.__init__(self)
In-Reply-To: <43eba7f7$0$507$9b4e6d93@newsread4.arcor-online.net>
References: <43eb5a9d$1_2@newspeer2.tds.net>
	<K5mdnTQ_1Ime4XbeRVn-ig@comcast.com>
	<43eba7f7$0$507$9b4e6d93@newsread4.arcor-online.net>
Message-ID: <OMydnYPzi6FiYHbeRVn-rQ@comcast.com>

Jan Niklas Fingerle wrote:
> Steven Bethard <steven.bethard at gmail.com> wrote:
>> Personally, I'd call the lack of the super calls in threading.Thread and 
>> Base bugs.  
> 
> It can't be a bug since it wasn't a bug before super was introduced and
> you don't wan't to break working Python-2.x-code. 

Just because there wasn't a bugfix available at the time doesn't mean it 
wasn't a bug. ;) The threading.Thread class does not properly call 
sibling constructors in multiple inheritance. This should either be 
fixed in the implementation (by introducing a call to super) or fixed in 
the documentation (by indicating that threading.Thread does not support 
multiple inheritance in its __init__() method).

>> But __init__() is definitely a tricky case since the 
>> number of arguments tends to change in the __init__() methods of classes...
> 
> ACK. And every __init__ will have to accept *any* arguments you give to
> it and call super with *all* the arguments it got. This is tricky and
> easily to get wrong. Super is a good tool to use, when dealing with
> diamond shape inheritance. In any other case I would use the direct
> calls to the base classes. In fact, i've yet to find a non-textbook-case
> where I really need diamond shape inheritance. OTOH I don't mean to say
> that noone else needs it either.

I've used diamond inheritance exactly once, and all the classes under 
that hierarchy were under my control, so they all used super properly. 
And fortunately, the constructors of those classes didn't take any 
arguments, so I didn't run into any of the nastier sides of super.

Using super is guaranteed to work as long as the number of arguments of 
the method does not change from that of the superclass.  For the 
__init__() method, this means that super is guaranteed to work as long 
as it takes no arguments, since object.__init__() takes no arguments. 
Sure, I'd love to see super work right in other cases, but for the OP's 
situation at least, super already does what it's supposed to.

STeVe


From bearophileHUGS at lycos.com  Mon Feb 27 19:13:09 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 27 Feb 2006 16:13:09 -0800
Subject: sort one list using the values from another list
In-Reply-To: <VRLMf.110114$4l5.62634@dukeread05>
References: <mailman.2447.1140969980.27775.python-list@python.org>
	<Bb-dncKoOeYvQ5zZRVn-uw@comcast.com>
	<1140981038.788111.93500@j33g2000cwa.googlegroups.com>
	<9bpMf.109707$4l5.58949@dukeread05>
	<1140990438.693026.14600@p10g2000cwp.googlegroups.com>
	<00sMf.109743$4l5.9230@dukeread05>
	<1hbdmux.1uvypp25sjx7jN%aleaxit@yahoo.com>
	<I6tMf.109755$4l5.106334@dukeread05>
	<zpAMf.109772$4l5.24415@dukeread05> <44034b68$1@nntp0.pdx.net>
	<VRLMf.110114$4l5.62634@dukeread05>
Message-ID: <1141085589.680130.204380@j33g2000cwa.googlegroups.com>

Following Ron Adam solution (and using [] instead of list() in the last
line), this may be a possible solution of the problem, that is often
quite fast:

def psort16(s1, s2):
    try:
        d = dict(izip(s2, s1))
    except TypeError:
        _indices = range(len(s1))
        _indices.sort(key=s2.__getitem__)
        s1[:] = map(s1.__getitem__, _indices)
    else:
        if len(d) == len(s1):
            s1[:] = [d[v] for v in sorted(d)]
        else:
            _indices = range(len(s1))
            _indices.sort(key=s2.__getitem__)
            s1[:] = map(s1.__getitem__, _indices)

Bye,
bearophile



From spwpreston at gmail.com  Fri Feb 10 18:21:58 2006
From: spwpreston at gmail.com (S Borg)
Date: 10 Feb 2006 15:21:58 -0800
Subject: absolute removal of '\n' and the like
Message-ID: <1139613718.688010.216370@z14g2000cwz.googlegroups.com>


Hello,

 If I have a string, what is the strongest way to assure the
removal of any line break characters?

Line break characters must always be the last character in a line, so
would
this:    str = linestring[:-1]

 work?

This is my first real 'learning python' project, and I don't want to
get in the habit
of doing things the 'Java way'. Your comments and suggestions are very
much
appreciated.

thanks,

S



From lycka at carmen.se  Sun Feb  5 08:31:29 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Sun, 05 Feb 2006 14:31:29 +0100
Subject: Compiling
In-Reply-To: <mailman.1387.1138986082.27775.python-list@python.org>
References: <mailman.1387.1138986082.27775.python-list@python.org>
Message-ID: <ds4unh$ts9$1@wake.carmen.se>

Simon Faulkner wrote:
> Pardon me if this has been done to death but I can't find a simple 
> explanation.
> 
> I love Python for it's ease and speed of development especially for the 
> "Programming Challenged" like me but why hasn't someone written a 
> compiler for Python?
> 
> I guess it's not that simple eh?

In case you really just want to run your Python programs
on computers without Python installed, there are several
tools that will create a myprogram.exe from your myprogram.py.
These tools don't make machinecode executables. Instead, they
basically bundle python.exe, your program and whatever is
needed into an single .exe-file.

Google for e.g. py2exe or cx_freeze.


From ian at excess.org  Thu Feb  9 14:46:32 2006
From: ian at excess.org (Ian Ward)
Date: Thu, 09 Feb 2006 14:46:32 -0500
Subject: cursesw+setlocale fixes it!
In-Reply-To: <43EB732A.2020202@v.loewis.de>
References: <mailman.1566.1139345769.27775.python-list@python.org>	<43E9234B.6030108@v.loewis.de>
	<11ujl0hof3fql62@corp.supernews.com>	<mailman.1617.1139425534.27775.python-list@python.org>	<43EA6238.6040004@v.loewis.de>	<mailman.1631.1139438813.27775.python-list@python.org>	<1139446935.221566.287710@g43g2000cwa.googlegroups.com>
	<mailman.1662.1139495909.27775.python-list@python.org>
	<43EB732A.2020202@v.loewis.de>
Message-ID: <43EB9C18.1020809@excess.org>

Martin v. L?wis wrote:
> That's very easy. Contribute a working patch. That patch should support
> all possible situations (e.g. curses is ncurses, and ncursesw is
> available, curses is ncurses, and ncursesw is not available, curses
> is not ncurses), and submit that patch to sf.net/projects/python.

Done.

http://sourceforge.net/tracker/index.php?func=detail&aid=1428494&group_id=5470&atid=305470

Ian Ward



From asma61 at dsl.pipex.com  Thu Feb 23 16:58:04 2006
From: asma61 at dsl.pipex.com (DaveM)
Date: Thu, 23 Feb 2006 21:58:04 +0000
Subject: 2.4.2 + Zone Alarm
References: <1140481575.506191.9980@g47g2000cwa.googlegroups.com>
Message-ID: <52bsv11r0ce88v44iulpslq742kqd0ngq3@4ax.com>

On 20 Feb 2006 16:26:15 -0800, "DannyB" <dbough77 at yahoo.com> wrote:

>I believe this issue is known - I haven't found a way around it.
>
>ZoneAlarm seems to be stopping IDLE from running.
>I get two errors:
>
>"Socket Error:  Connection refused"
>and
>"IDLE's subprocess didn'tt make connection.  Either IDLE can't start a
>subprocess or personal firewall software is blocking the connection."
>
>I know they are both due to ZA - I've set up ZA to allow Python to
>access the internet w/o prompting me (even though I now it doesn't
>actually access the internet.)
>
>This usually happens after I create a script and run it in the GUI - if
>the script ends up being a never ending loop - I X out of IDLE to stop
>it.  The next time I try to run a script I get the errors until I
>reboot the computer.
>
>IIs there a fix?  I'm pretty sure that this problem started with 2.3.1
>(i'm suing 2.4.2).

I get an the same problem in those circumstances, although I can't remember
if I get that error message (and I use ZoneAlarm).

Windows task manager shows pythonw.exe still running and terminating the
process allows IDLE to start normally. Easier than rebooting. PythonWin
doesn't suffer this problem, btw.

DaveM


From rpdooling at gmail.com  Mon Feb 20 09:58:02 2006
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 20 Feb 2006 06:58:02 -0800
Subject: Komodo - Will it Lock Me In?
References: <yEncExpress_Rulz!_www.techsono.com_3223072898@firstva.com>
Message-ID: <1140447482.237486.19780@o13g2000cwo.googlegroups.com>

matt> Any other thoughts on Komodo?

If you code in any other languages (Perl, Ruby) or need to edit xml,
html, php etc, Komodo will handle all of these for you with appropriate
color coding, nested loops etc.

rd
www.dooling.com

Matt wrote:
> Hi Everybody,
>
> If I were to use Komodo to write in Python, would it add a lot of goo to my
> code such that I would not be able to switch to another IDE without having to
> claw my way out of a tarpit first?
>
> Any other thoughts on Komodo? I am considering it because I am hoping to find
> a solution to the install-packages-until-you-go-blind aspect of Python.
> Setting up a serious, cross-platform, gui development environment is quite a
> struggle for a newbie.
> 
> Thanks,
> Matt



From duncan.booth at invalid.invalid  Mon Feb  6 04:46:57 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 6 Feb 2006 09:46:57 GMT
Subject: Strange behavior with os call in cgi script
References: <tf0du1h7sn03joag0cpjkmtm6hgfg2ppnv@4ax.com>
	<mailman.1464.1139197674.27775.python-list@python.org>
Message-ID: <Xns976263803544Cduncanbooth@127.0.0.1>

Steve Holden wrote:

>> Add logging to your program:
>> http://www.python.org/doc/2.3.5/lib/module-logging.html
>> 
> Probably oiverkill, particularly for a beginner (is it only me that 
> thinks the logging module is either way over-complicated or way 
> under-documented?).

No, I would agree with you on that. I get the impression that it was 
designed by studying some pre-existing logging packages and saying 'what 
neat features can we take from each of these' rather than by writing up a 
set of use-cases and saying 'what is the simplest way we can make all of 
these possible'. 

The way it is now means there is quite a step from the simplest possible 
use to slightly more complex use. For example, the support for reading 
configuration files is wonderfully general purpose, but far too much for 
the vast majority of applications: you really don't want to expose a 
typical end user to that sort of configuration soup. If all you want in 
your application is to let the user specify the name of the logfile and the 
logging level you are on your own (and you can't even convert the log level 
name from a string to the required number without accessing an _ prefixed 
variable in the logging module).



From rtilley at vt.edu  Sat Feb 11 10:46:55 2006
From: rtilley at vt.edu (rtilley)
Date: Sat, 11 Feb 2006 15:46:55 +0000
Subject: python 2.5 and hashlib
In-Reply-To: <1halgtq.1sv413qle9bhdN%aleaxit@yahoo.com>
References: <dslepr$bld$1@solaris.cc.vt.edu>
	<1halgtq.1sv413qle9bhdN%aleaxit@yahoo.com>
Message-ID: <dsliep$gie$1@solaris.cc.vt.edu>

Alex Martelli wrote:
> http://python.org/peps/pep-0356.html -- but it's still a draft, being
> discussed in the last few days on python-dev.

Thank you, that's exactly what I was looking for!


From rrr at ronadam.com  Sun Feb 26 19:46:26 2006
From: rrr at ronadam.com (Ron Adam)
Date: Sun, 26 Feb 2006 18:46:26 -0600
Subject: sort one list using the values from another list
In-Reply-To: <1140990438.693026.14600@p10g2000cwp.googlegroups.com>
References: <mailman.2447.1140969980.27775.python-list@python.org>
	<Bb-dncKoOeYvQ5zZRVn-uw@comcast.com>
	<1140981038.788111.93500@j33g2000cwa.googlegroups.com>
	<9bpMf.109707$4l5.58949@dukeread05>
	<1140990438.693026.14600@p10g2000cwp.googlegroups.com>
Message-ID: <00sMf.109743$4l5.9230@dukeread05>

bearophileHUGS at lycos.com wrote:
>> It's faster on my system because d.keys() is already sorted.  But that may not be the case on other versions of python.<
> 
> In my version it's a little slower. But what system are you using where
> keys is already sorted? IronPython maybe?
> 
> Bye,
> bearophile 


Python 2.4.1 (#65, Mar 30 2005, 09:13:57) [MSC v.1310 32 bit (Intel)] on 
win32

I was a bit surprised by them being sorted.  I just happend to try 
d.keys() in place of s2, and it sped up.  I was expecting it to be a bit 
slower.

Considering the number time I sort keys after getting them, It's the 
behavior I would prefer.  Maybe a more dependable dict.sortedkeys() 
method would be nice.  ;-)

Like Alex pointed out you need to make sure there aren't duplicates in 
the list used for keys.

def psort10(s1, s2):
     d = dict(zip(s2,s1))
     assert len(d) == len(s1)
     s1[:] = (d[n] for n in sorted(d.keys()))

Ron


From frank at niessink.com  Tue Feb 28 16:02:22 2006
From: frank at niessink.com (Frank Niessink)
Date: Tue, 28 Feb 2006 22:02:22 +0100
Subject: minimize a program into an icon on the taskbar.
In-Reply-To: <4404B882.8070902@websafe.com>
References: <47a726d60602270326i2df525d3sd4a04b74aa447a16@mail.gmail.com>
	<mailman.2520.1141148694.27775.python-list@python.org>
	<4404B882.8070902@websafe.com>
Message-ID: <4404BA5E.6020601@niessink.com>

Larry Bates:
> Its called the system tray and here is a link to some sample code
> for Windows I found via Google:

But, but, but, ... the OP was talking about a wxPython app. 
wx.TaskBarIcon is the wxPython builtin support for making an icon in the 
system tray. Nothing else is needed.

Cheers, Frank


From __peter__ at web.de  Tue Feb 14 05:58:38 2006
From: __peter__ at web.de (Peter Otten)
Date: Tue, 14 Feb 2006 11:58:38 +0100
Subject: 88k regex = RuntimeError
References: <1139900873.361930.135880@g44g2000cwa.googlegroups.com>
Message-ID: <dssd1p$spr$02$1@news.t-online.com>

jodawi wrote:

> I need to find a bunch of C function declarations by searching
> thousands of source or html files for thousands of known function
> names. My initial simple approach was to do this:
> 
> rxAllSupported = re.compile(r"\b(" + "|".join(gAllSupported) + r")\b")
> # giving a regex of   \b(AAFoo|ABFoo|   (uh... 88kb more...)   |zFoo)\b
> 
> for root, dirs, files in os.walk( ... ):
> ...
>     for fileName in files:
> ...
>         filePath = os.path.join(root, fileName)
>         file = open(filePath, "r")
>         contents = file.read()
> ...
>         result = re.search(rxAllSupported, contents)
> 
> but this happens:
> 
>     result = re.search(rxAllSupported, contents)
>   File "C:\Python24\Lib\sre.py", line 134, in search
>     return _compile(pattern, flags).search(string)
> RuntimeError: internal error in regular expression engine
> 
> I assume it's hitting some limit, but don't know where the limit is to
> remove it. I tried stepping into it repeatedly with Komodo, but didn't
> see the problem.
> 
> Suggestions?

One workaround may be as easy as

wanted = set(["foo", "bar", "baz"])
file_content = "foo bar-baz ignored foo()"

r = re.compile(r"\w+")
found = [name for name in r.findall(file_content) if name in wanted]

print found

Peter



From uval at rz.uni-karlsruhe.de  Tue Feb  7 11:57:54 2006
From: uval at rz.uni-karlsruhe.de (=?ISO-8859-1?Q?Sch=FCle_Daniel?=)
Date: Tue, 07 Feb 2006 17:57:54 +0100
Subject: * 'struct-like' list *
In-Reply-To: <1139323814.071618.109950@z14g2000cwz.googlegroups.com>
References: <1139245389.529742.317110@g43g2000cwa.googlegroups.com>
	<1139279974.075753.299710@g14g2000cwa.googlegroups.com>
	<1139323814.071618.109950@z14g2000cwz.googlegroups.com>
Message-ID: <dsacuv$gde$1@news2.rz.uni-karlsruhe.de>

Ernesto wrote:
> Thanks for the approach.  I decided to use regular expressions.  I'm
> going by the code you posted (below).  I replaced the line re.findall
> line with my file handle read( ) like this:
> 
> print re.findall(pattern, myFileHandle.read())
> 
> This prints out only brackets [].  Is a 're.compile' perhaps necessary
> ?

if you see [] that means findall didn't find anything
that would match your pattern
if you re.compile your pattern beforehand that
would not make findall find the matched text
it's only there for the optimization

consider
lines = [line for line in file("foo.txt").readlines() if 
re.match(r"\d+",line)]

in this case it's better to pre-compile regexp one and use it
to match all lines

number = re.compile(r"\d+")
lines = [line for line in file("foo.txt").readlines() if number.match(line)]

fire interactive python and play with re and patterns
speaking from own experience ... the propability is
against you that you will make pattern right on first time

Regards, Daniel



From ilias at lazaridis.com  Tue Feb 21 06:14:53 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 21 Feb 2006 13:14:53 +0200
Subject: - Copy dictionary entries to attributes
In-Reply-To: <1140319945.169944.31940@g14g2000cwa.googlegroups.com>
References: <dt7kv6$dcn$1@usenet.otenet.gr>
	<1140319945.169944.31940@g14g2000cwa.googlegroups.com>
Message-ID: <dtesnb$87m$2@usenet.otenet.gr>

Ben Wilson wrote:
> Perhaps:
> 
> def dictionary_make_attributes(self, settings):
>      for k,v in settings:
>          setattr(self, k, v)

this one resulted in an error:

"ValueError: too many values to unpack"

it works with this correction:

for k,v in settings.items()

> http://ftp.python.org/doc/lib/built-in-funcs.html#l2h-64



-- 
http://lazaridis.com


From gaz082 at gmail.com  Tue Feb 21 13:02:22 2006
From: gaz082 at gmail.com (Gaz)
Date: 21 Feb 2006 10:02:22 -0800
Subject: No
In-Reply-To: <mailman.2248.1140542337.27775.python-list@python.org>
References: <1140534490.873612.64280@g47g2000cwa.googlegroups.com>
	<1140539240.807314.283280@g43g2000cwa.googlegroups.com>
	<mailman.2248.1140542337.27775.python-list@python.org>
Message-ID: <1140544942.394795.240520@g47g2000cwa.googlegroups.com>

Im running it in my test site at F2o.org. Perhaps its server's fault
and not script's fault. I'll deal this issue at its forums.

:)



From michele.simionato at gmail.com  Tue Feb 21 10:49:05 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 21 Feb 2006 07:49:05 -0800
Subject: streaming Popen.stdout
Message-ID: <1140536945.936115.59570@z14g2000cwz.googlegroups.com>

I was experimenting with subprocess.Popen with the following script:

$ cat Popen_ex.py
import sys, subprocess
po = subprocess.Popen([sys.executable, 'hello.py'],
stdout=subprocess.PIPE,
                      bufsize=0)
for line in po.stdout:
    print line,

where hello.py is the following script:

$ cat hello.py
import time
time.sleep(1)
print 'hello'
time.sleep(1)
print 'world'
time.sleep(1)
print '*END*'
time.sleep(1)

It turns out that Popen collects all the output and write everything
together
after 4 seconds, where I would like to print a line every seconds.
How can I get that in a simple way? A Unix-only solution would be fine,
too.


        Michele Simionato



From plahey at alumni.caltech.edu  Fri Feb 17 14:49:46 2006
From: plahey at alumni.caltech.edu (plahey at alumni.caltech.edu)
Date: 17 Feb 2006 11:49:46 -0800
Subject: RSA in python
In-Reply-To: <1140205278.492979.248300@g47g2000cwa.googlegroups.com>
References: <mailman.2057.1140187795.27775.python-list@python.org>
	<1140205278.492979.248300@g47g2000cwa.googlegroups.com>
Message-ID: <1140205786.341094.283110@g47g2000cwa.googlegroups.com>

Looking at the api documentation again, it is possible that they want
this:

pubkey = open( 'pubkey.pem', 'rb' ).read()          # binary read here?
rsa = M2Crypto.RSA.load_pub_key(pubkey)

Anyway, things to play with...



From sybrenUSE at YOURthirdtower.com.imagination  Wed Feb  1 08:14:58 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Wed, 1 Feb 2006 14:14:58 +0100
Subject: OpenRTS - new OSS Python game
References: <drq0vt$62f$1@orkan.itea.ntnu.no>
	<slrndu128k.8gn.sybrenUSE@schuimige.unrealtower.org>
	<drq23q$6om$1@orkan.itea.ntnu.no>
Message-ID: <slrndu1d2i.8jp.sybrenUSE@schuimige.unrealtower.org>

Andreas R. enlightened us with:
> The game has isometric graphics. It's possible to have nice
> isometric graphics, ie. look at Civilization 3.  Besides, there's a
> lot more to a good strategy game than good looks.

True. That's why I only commented on the graphics - that's the only
visible thing ATM ;-)

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From xavier.morel at masklinn.net  Fri Feb 10 09:15:04 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Fri, 10 Feb 2006 15:15:04 +0100
Subject: Create dict from two lists
In-Reply-To: <453k9eF444frU1@uni-berlin.de>
References: <1139579518.129742.265680@o13g2000cwo.googlegroups.com>
	<453k9eF444frU1@uni-berlin.de>
Message-ID: <dsi70h$48e$1@aphrodite.grec.isp.9tel.net>

Diez B. Roggisch wrote:
> py wrote:
> 
>> I have two lists which I want to use to create a dictionary.  List x
>> would be the keys, and list y is the values.
>>
>> x = [1,2,3,4,5]
>> y = ['a','b','c','d','e']
>>
>> Any suggestions?  looking for an efficent simple way to do this...maybe
>> i am just having a brain fart...i feel like this is quit simple.
> 
> dict(zip(x,y))
> 
> Diez
I'd even suggest using izip (from itertools), it's often much faster 
than zip (end result is the same).

Demo:

 >>> from itertools import izip
 >>> l1 = range(5000)
 >>> l2 = range(5000, 10000)
 >>> from timeit import Timer
 >>> t1 = Timer("dict(zip(l1, l2))", "from __main__ import l1, l2")
 >>> t2 = Timer("dict(izip(l1, l2))", "from __main__ import l1, l2, izip")
 >>> min(t1.repeat(5, 10000))
17.989041903370406
 >>> min(t2.repeat(5, 10000))
10.381146486494799
 >>>

42% speed gain from using izip instead of zip (memory was not an issue 
during the test, machine had 1.3Gb of available ram)


From iansan at gmail.com  Wed Feb 22 13:24:47 2006
From: iansan at gmail.com (IamIan)
Date: 22 Feb 2006 10:24:47 -0800
Subject: Exiting os.spawnv's subroutine
References: <1140215299.383562.57250@g14g2000cwa.googlegroups.com>
	<donn-8A2493.16121017022006@gnus01.u.washington.edu>
	<1140562567.681998.243500@o13g2000cwo.googlegroups.com>
Message-ID: <1140632687.330837.325770@g47g2000cwa.googlegroups.com>

Strange but removing the try/except part of the second script (leaving
only the processing) removed the 2 minute lag at the end of each
subroutine.



From steve at holdenweb.com  Mon Feb  6 08:40:58 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 06 Feb 2006 13:40:58 +0000
Subject: win32com, BSTR, and null terminated strings
In-Reply-To: <lUadna9z9p16fnveUSdV9g@ptd.net>
References: <mzh5xzyr.fsf@qwhd746oihd49.net> <lUadna9z9p16fnveUSdV9g@ptd.net>
Message-ID: <ds7jl8$18c$2@sea.gmane.org>

John Bauman wrote:
> "Matt Helm" <eric at qwhd746oihd49.net> wrote in message 
> news:mzh5xzyr.fsf at qwhd746oihd49.net...
> 
>>However, what is the proper way to recover the actual string? I have
>>been using:
>>
>>   r.split("\0", 1)[0]
>>
> 
> I'd prefer to use
> r[:-1]
> to strip off the last character of the string. 
> 
> 
Unfortunately there's no guarantee that the string occupies the whole of 
the returned buffer: the first zero byte terminates the string.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From erniedude at gmail.com  Mon Feb  6 12:03:09 2006
From: erniedude at gmail.com (Ernesto)
Date: 6 Feb 2006 09:03:09 -0800
Subject: * 'struct-like' list *
Message-ID: <1139245389.529742.317110@g43g2000cwa.googlegroups.com>

I'm still fairly new to python, so I need some guidance here...

I have a text file with lots of data.  I only need some of the data.  I
want to put the useful data into an [array of] struct-like
mechanism(s).  The text file looks something like this:

[BUNCH OF NOT-USEFUL DATA....]

Name:  David
Age: 108   Birthday: 061095   SocialSecurity: 476892771999

[MORE USELESS DATA....]

Name........

I would like to have an array of "structs."  Each struct has

struct Person{
    string Name;
    int Age;
    int Birhtday;
    int SS;
}

I want to go through the file, filling up my list of structs.

My problems are:

1.  How to search for the keywords "Name:", "Age:", etc. in the file...
2.  How to implement some organized "list of lists" for the data
structure.

Any help is much appreciated.



From flashkNO at SPAMgmail.com  Fri Feb 17 01:46:33 2006
From: flashkNO at SPAMgmail.com (Farshid Lashkari)
Date: Thu, 16 Feb 2006 22:46:33 -0800
Subject: file.read problem
In-Reply-To: <1140158220.388409.87650@g47g2000cwa.googlegroups.com>
References: <1140158220.388409.87650@g47g2000cwa.googlegroups.com>
Message-ID: <BieJf.15428$MJ.2728@fed1read07>

> When I do this I get the first 634 bytes. I tried using the:
> f = open('myfile,'rb')
> option, but now there are a few 0x0D bytes extra in myfile. 0x0D =
> Carriage return. How can I make a program that not puts in the 0x0D
> bytes in windows.


Try opening the file in 'rbU' mode. This will use universal newline mode 
and convert all carriage returns to line feeds.

-Farshid


From claudio.grondi at freenet.de  Mon Feb  6 18:52:34 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Tue, 07 Feb 2006 00:52:34 +0100
Subject: a question regarding call-by-reference
In-Reply-To: <1139250105.744691.110440@o13g2000cwo.googlegroups.com>
References: <1139250105.744691.110440@o13g2000cwo.googlegroups.com>
Message-ID: <ds8ng6$hdl$1@newsreader3.netcologne.de>

enjoying the view wrote:
> I am working on a school project, trying to build a simple RPC stub
> generator. The idea is that the generator takes a normal python file
> with functions defined in it and produces a client and server stub. The
> client stub has the same functions defined, but they just connect to
> the server and ask it to call the desired functions. The server stub is
> a server listening for incoming requests and dispatching them to the
> appropriate functions and sending back the results. Extremely simple
> and I've gotten it to mostly work, but I have one problem:
> call-by-reference parameters. An example:
> 
> A function like this:
> def sum(a, b):
>   return a + b
> 
> would yield a client stub like this (simplified):
> def sum(a, b):
>    send_message({'funcname': 'sum', 'args': (a, b)})
>    result = receive_message()
>    return result
> 
> Now, this works just fine. I get problems when I try to do something
> like this:
> def add_elm(list):
>    list.append('elm')
>    return
> 
> Imported normally this would work fine. The list given as a parameter
> would be one element larger. But when the stubs are generated, the
> function doesn't return anything and the list is appended in the server
> and the client-side list is left untouched. At first I thought the
> solution was easy, just return the changed parameters and place them in
> the parameter variables in the client stub:
> def add_elm(list):
>    send_message({'funcname': 'add_elm', 'args': (list)})
>    response = receive_message()
>    (list) = response.get('args')
>    return response.get('result')
> 
> The problem is, this doesn't work. The original list doesn't point to
> the changed list. I have been trying to figure this out and it seems
> that if I just assign to the list variable it just modifies the local
> (to the function) name space, and that those changes aren't reflected
> in the list in the original name space.
> 
> I believe there are some ways around this, but I haven't found one that
> would not require any special handling in either the code calling the
> client stub or the original functions. I want to maintain transparency.
> 
> etv
> 
I am not an expert, so maybe someone else can provide here a nice tricky 
solution, but I am quite sure, that there is no simple way around the 
described problem.
The only strategy which comes to my mind in this context is to use for 
all function arguments and return values only pickled objects which need 
to be unpickled on the other side. Probably some compression algorithm 
can help to keep the network traffic down in case large amount of data 
must be exchanged.

Claudio


From http  Mon Feb  6 15:04:21 2006
From: http (Paul Rubin)
Date: 06 Feb 2006 12:04:21 -0800
Subject: Webmail with Python
References: <pan.2006.02.04.20.02.29.212441@thomas-guettler.de>
	<43E726B5.5020109@mxm.dk>
	<pan.2006.02.06.15.38.01.245423@thomas-guettler.de>
Message-ID: <7x3biws18a.fsf@ruckus.brouhaha.com>

Thomas Guettler <niemand.leermann at thomas-guettler.de> writes:
> Yes, Zope or Plone are to heavyweight for this. I will use squirrelmail,
> I think it stable. I hope that I don't need to touch the PHP code.

Be careful, Squirrelmail had some annoying privacy bugs which the
maintainers (as of the last time I messed with squirrelmail, a year or
two ago) refused to acknowledge.  I have no idea whether they're fixed
in the squirrelmail distro since then.  I submitted some patches that
I guess I can post on my site sometime.



From reply.in.the.newsgroup at my.address.is.invalid  Sun Feb 26 05:19:49 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Sun, 26 Feb 2006 11:19:49 +0100
Subject: ImportError in Unpickle
References: <1140916392.357064.291290@t39g2000cwt.googlegroups.com>
Message-ID: <8303025o795ogn175pdgoq7k2ahgqotnja@4ax.com>

draghuram at gmail.com:
>I have a python script that pickles and unpickles a give object. It
>works without any problems on windows (the data was pickled on windows
>first). But when I try to run the script on Linux, I get the following
>error:
[...]
>ImportError: No module named __main__

There are some posts in the Usenet archive that suggest you need to open
the pickled file in binary mode.
http://groups.google.nl/group/comp.lang.python/browse_frm/thread/2da0dcfc0a414251/0885a7a5723f3b03

-- 
Ren? Pijlman


From sw at wordtech-software.com  Sat Feb 11 09:39:44 2006
From: sw at wordtech-software.com (Kevin Walzer)
Date: Sat, 11 Feb 2006 09:39:44 -0500
Subject: Yet another GUI toolkit question...
In-Reply-To: <dskp1p$huu$01$1@news.t-online.com>
References: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
	<dskp1p$huu$01$1@news.t-online.com>
Message-ID: <43EDF730.2070204@wordtech-software.com>

Florian Nykrin wrote:
> Hi Kevin!
> 
> I have no experience with Tkinter, but I did some small GUIs with
> wxPython and PyGTK.
> 
> wxPython works very well on Windows, but on Linux (Ubuntu/Debian in my
> case) it is very difficult to work with and buggy.
> PyGTK-Applications on the other hand maybe do not look totally like
> Windows-Apps, but they work equally good on both systems (and have
> native look when working with Gnome).
> 
> I would take a look at PyGTK in combination with Glade, which is what I
> use.
> 
> Regards, Florian.
Unfortunately, PyGTK does not run natively on the Mac (it's X11 only).


-- 
Kevin Walzer
iReveal: File Search Tool
http://www.wordtech-software.com


From kent at kentsjohnson.com  Tue Feb 14 06:07:17 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Tue, 14 Feb 2006 06:07:17 -0500
Subject: 88k regex = RuntimeError
In-Reply-To: <1139900873.361930.135880@g44g2000cwa.googlegroups.com>
References: <1139900873.361930.135880@g44g2000cwa.googlegroups.com>
Message-ID: <43f1b58b_1@newspeer2.tds.net>

jodawi wrote:
> I need to find a bunch of C function declarations by searching
> thousands of source or html files for thousands of known function
> names. My initial simple approach was to do this:
> 
> rxAllSupported = re.compile(r"\b(" + "|".join(gAllSupported) + r")\b")
> # giving a regex of   \b(AAFoo|ABFoo|   (uh... 88kb more...)   |zFoo)\b

Maybe you can be more clever about the regex? If the names above are 
representative then something like r'\b(\w{1,2})Foo\b' might work.


From gabriel.becedillas at gmail.com  Mon Feb  6 14:19:53 2006
From: gabriel.becedillas at gmail.com (gabriel.becedillas at gmail.com)
Date: 6 Feb 2006 11:19:53 -0800
Subject: Replace a module variable with a function call
In-Reply-To: <mailman.1514.1139252631.27775.python-list@python.org>
References: <1139252075.497468.137100@g44g2000cwa.googlegroups.com>
	<mailman.1514.1139252631.27775.python-list@python.org>
Message-ID: <1139253593.106535.175310@g47g2000cwa.googlegroups.com>

There are modules (like os) that define some stuff that depends on the
platform (for example linesep). This platform dependent constants gets
their values assigned when the module gets loaded, but in our
application, different threads might run on different computers (by
proxying syscalls).. and we need to calculate that value every time the
constant gets referenced. We have a slightly modified version of
python's distro to accomplish this.

It sort of a design problem, like not exposing member variables of a
class to avoid breaking clients, and use an accesor function instead.

So.. it doesn't depend on the phase of the moon.. it depends on the
architecture of a host.
I can write ten million examples of functions that doesn't depend on
arguments to calculate a dynamic value, but since you couldn't figure
that out by yourself.. I'm not going to waste my time with more
examples coz probably you won't understand them either.



From lycka at carmen.se  Tue Feb 28 10:47:37 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Tue, 28 Feb 2006 16:47:37 +0100
Subject: Firebird and Python
In-Reply-To: <440456C9.4080604@freenet.de>
References: <1140716394.225560.27920@t39g2000cwt.googlegroups.com>	<mailman.2364.1140721473.27775.python-list@python.org>	<1140727082.800917.44550@i40g2000cwc.googlegroups.com>	<dtmk8t$an9$1@wake.carmen.se>	<mailman.2392.1140782962.27775.python-list@python.org>	<dtni65$dnv$1@wake.carmen.se>
	<dtno33$qbk$1@nemesis.news.tpi.pl>	<dtv83h$t52$1@wake.carmen.se>
	<mailman.2491.1141079616.27775.python-list@python.org>
	<440456C9.4080604@freenet.de>
Message-ID: <du1rap$p26$1@wake.carmen.se>

Claudio Grondi wrote:
> Do I understand it right, that I can use Firebird database in the same 
> way as I can use the Berkeley one provided in Python standard distribution?

That depends on what you mean by "the same way"...

As with Berkeley, you can use it in-process, and don't need a
separate server process. On the other hand, it's a full SQL
database, not a "persistent mapping" as Berkeley DB etc. It's
better to compare it with SQLite, but it's not as lite. That
is, it support more of the SQL standards. Firebird can also be
used as a database server, not just as an embedded database.


From fuzzyman at gmail.com  Mon Feb 20 05:11:26 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 20 Feb 2006 02:11:26 -0800
Subject: Format file size for printing
In-Reply-To: <1140387431.610729.48700@o13g2000cwo.googlegroups.com>
References: <1140387431.610729.48700@o13g2000cwo.googlegroups.com>
Message-ID: <1140430286.047195.135460@g47g2000cwa.googlegroups.com>


abcd wrote:
> is there a built-in way of printing the size of a file nicely?
>
> So if the file size is 103803 bytes it prints out like: 103.8K
> or
> 0.1MB
>
> something liek that?

Pathutils (small extension module - not builtin) contains a basic
function that does this.

    http://www.voidspace.org.uk/python/pathutils.html

All the best,


Fuzzyman
http://www.voidspace.org.uk/python/index.shtml



From rtilley at vt.edu  Wed Feb 15 16:22:45 2006
From: rtilley at vt.edu (rtilley)
Date: Wed, 15 Feb 2006 16:22:45 -0500
Subject: %SystemDrive%
In-Reply-To: <1140035746.935167.205020@z14g2000cwz.googlegroups.com>
References: <dsvt14$rev$1@solaris.cc.vt.edu><43F37BDE.9020505@activestate.com>
	<mailman.1965.1140031059.27775.python-list@python.org>
	<dsvv5j$4dm$1@solaris.cc.vt.edu>
	<1140035746.935167.205020@z14g2000cwz.googlegroups.com>
Message-ID: <dt0639$i8d$1@solaris.cc.vt.edu>

Atanas Banov wrote:
> using
>    os.chdir('/')
>    os.getcwd()
> is plain wrong in Windows.
> 
> what it does is change the current directory to root of the CURRENT
> DRIVE (i.e. the drive of the directory where script was started from),
> not the system drive. for example, if current directory was
> c:\myscripts and system drive is d:, this will return c:\ and not d:\.
> hence chdir doesnt do any good

Thanks for the explanation. I'll use the environ feature of os... I just 
didn't realize it existed :)


From rob at digital-crocus.com  Thu Feb 16 10:22:15 2006
From: rob at digital-crocus.com (Robin Haswell)
Date: Thu, 16 Feb 2006 15:22:15 +0000
Subject: Determing whether two ranges overlap
Message-ID: <pan.2006.02.16.15.22.15.647369@digital-crocus.com>

Hey guys

I was wondering if you could give me a hand with something. If I have two
tuples that define a range, eg: (10, 20), (15, 30), I need to determine
whether the ranges overlap each other. The algo needs to catch:

(10, 20) (15, 25)
(15, 25) (10, 20)
(10, 25) (15, 20)
and
(15, 20) (10, 25)

I can think of lots of ways to do this but it's in a tight loop so I need
it to be as efficient as possible. Any help welcome :-)

Cheers

-Rob


From swilson at acs.on.ca  Thu Feb  2 20:34:39 2006
From: swilson at acs.on.ca (swilson at acs.on.ca)
Date: 2 Feb 2006 17:34:39 -0800
Subject: HTMLDocument and Xpath
Message-ID: <1138930478.957440.104290@g14g2000cwa.googlegroups.com>

Hi, I want to use xpath to scrape info from a website using pyXML but I
keep getting no results.

For example, in the following, I want to return the text "Element1" I
can't get xpath to return anything at all.  What's wrong with this
code?

--------------------
from xml.dom.ext.reader import HtmlLib
from xml.xpath import Evaluate

reader = HtmlLib.Reader()
doc_node = reader.fromString("""
<html>
<head>
<title>Python Programming Language</title>
</head>
<body>
<table><tr><td>element1</td></tr></table>
</body>
</html>
""")

test = Evaluate('td', doc_node.documentElement)
print "test =", test
------------

All I get is an empty list for output.

Thx in advance

Shawn



From bonono at gmail.com  Tue Feb 21 03:46:46 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 21 Feb 2006 00:46:46 -0800
Subject: how to break a for loop?
In-Reply-To: <xhAKf.1202$PR2.30845@twister2.libero.it>
References: <1140476451.649515.127230@g44g2000cwa.googlegroups.com>
	<1140487935.870851.271820@g43g2000cwa.googlegroups.com>
	<xhAKf.1202$PR2.30845@twister2.libero.it>
Message-ID: <1140511606.355935.326890@f14g2000cwb.googlegroups.com>


Giovanni Bajo wrote:
> bonono at gmail.com wrote:
>
> >> I need to remove zeros from
> >> the begining of list, but I can't :-(.
> >
> > I believe the following is almost a direct translation of the above
> > sentence.
> >
> > import itertools as it
> > a=[0,0,0,1,0]
> > a[:]=it.dropwhile(lambda x: x is 0, a)
>
>
> Usa lambda x: x==0 or simply lambda x: x
>
> Using 'is' relies on the interpreter reusing existing instances of the
> immutable object '0', which is an implementation detail.

stand corrected. But I don't think "lambda x: x" is I want as 0 would
be false which would stop the dropwhile right away.

For this particular case one can even use operator.not_ directly, which
skip the lambda(has some peformance advantage).



From gregpinero at gmail.com  Sat Feb  4 12:41:48 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Sat, 4 Feb 2006 12:41:48 -0500
Subject: Recursive function going infinite and I can't see why.
In-Reply-To: <pan.2006.02.04.11.23.00.710814@REMOVETHIScyber.com.au>
References: <mailman.1409.1139037509.27775.python-list@python.org>
	<pan.2006.02.04.11.23.00.710814@REMOVETHIScyber.com.au>
Message-ID: <312cfe2b0602040941g11c22226w5afb0aa939f2a02e@mail.gmail.com>

Thanks for the advice guys.  See below.

On 2/4/06, Steven D'Aprano <steve at removethiscyber.com.au> wrote:
> On Sat, 04 Feb 2006 02:18:27 -0500, Gregory Pi?ero wrote:
>
> > class Node:
> >     def __init__(self):
> >         self.arg0=0
> >         self.arg1=0
> >         self.arg2=0
> >         self.arg3=0
>
> You appear to be iterating over these attributes. Hint: as soon as you
> have more than two pieces of data with names like foo0, foo1, foo2...
> you probably want something like this:
>
>     def __init__(self):
>         self.trees = [0, 0, 0, 0]  # they aren't args, they are sub-trees

I'll try this.

> This is quite a complex function. It seems to me, and perhaps I'm wrong,
> you are walking the nodes and ... doing what? When you call this function,
> what are the initial arguments you give it? In other words, what are
> oldnode and newnode, and where do they get set?
>

I posted the whole code, so that should be in there.

> In another post, you wrote:
>
> "By the way, all I'm trying to do here is take two trees, randomly find
> a sub-tree of each and swap the sub-trees.  So if anyone has a simple
> method for doing that I'm certainly open to that too."
>
> How about something like this?
>
> random.shuffle(node.trees)
>
> That does more than you ask, but maybe it is useful to you. If you only
> want to swap two, maybe something like this:
>
> a, b = random.randint(0,3), random.randint(0,3)
> node.trees[a], node.trees[b] = node.trees[b], node.trees[a]
>

That's not quite what I want.  I want to walk down each tree and get a
random subtree at a random depth.

> I think what you really need to do here is spend some time building a
> general tree class, before getting bogged down in the mechanics of your
> application. For example, it would be really useful to print your Node,
> and all its subtrees, so you can actually confirm that it contains what
> you think it contains.

I had a print method for the tree, but that was making an infinite
recursion too!

> Why is this important? Because if your tree of nodes contains a loop, such
> that node 1 has a subtree with node 2 that has a subtree with node 3 that
> has a subtree with node 1 again, most recursive algorithms will never
> halt, just keep cycling through the tree forever. Could that be your
> problem? There is no way for us to tell from the information we've got.

This sounds like what must be happening.  I don't know how else it
could get caught up in an infinite recursion.  The problem is, I don't
really know how to tell either ;-0

I guess I need to rethink this whole algorithm.  Maybe flatten the
trees somehow and then do the swap?  I'll let you guys know what I
come up with.

> --
> Steven.
>
> --
> http://mail.python.org/mailman/listinfo/python-list


--
Gregory Pi?ero
Chief Innovation Officer
Blended Technologies
(www.blendedtechnologies.com)


From tim.leeuwvander at nl.unisys.com  Tue Feb 14 10:48:28 2006
From: tim.leeuwvander at nl.unisys.com (Tim N. van der Leeuw)
Date: 14 Feb 2006 07:48:28 -0800
Subject: Embedding an Application in a Web browser
In-Reply-To: <1139930045.408507.151440@g43g2000cwa.googlegroups.com>
References: <1139930045.408507.151440@g43g2000cwa.googlegroups.com>
Message-ID: <1139932108.356041.155100@g14g2000cwa.googlegroups.com>

'A' Web Browser? Meaning: any random web-browser? Or specifically and
*only* Internet Explorer?

If you want it to work only and ever only in Internet Explorer, then
you can create a Python ActiveX object and embed that in your page;
using the pythonwin extensions.

Cheers,

--Tim



From fredrik at pythonware.com  Thu Feb 16 12:07:59 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Feb 2006 18:07:59 +0100
Subject: Determing whether two ranges overlap
References: <pan.2006.02.16.15.22.15.647369@digital-crocus.com>
Message-ID: <dt2bhh$art$1@sea.gmane.org>

Robin Haswell wrote:

> I was wondering if you could give me a hand with something. If I have two
> tuples that define a range, eg: (10, 20), (15, 30), I need to determine
> whether the ranges overlap each other. The algo needs to catch:
>
> (10, 20) (15, 25)
> (15, 25) (10, 20)
> (10, 25) (15, 20)
> and
> (15, 20) (10, 25)
>
> I can think of lots of ways to do this but it's in a tight loop so I need
> it to be as efficient as possible. Any help welcome :-)

how about:

    def overlap(a, b):
        return a[1] > b[0] and a[0] < b[1]

</F>





From peter at engcorp.com  Thu Feb 23 09:12:58 2006
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 23 Feb 2006 09:12:58 -0500
Subject: catching  traceback.print_exc()
In-Reply-To: <tNiLf.410464$0l5.81514@dukeread06>
References: <tNiLf.410464$0l5.81514@dukeread06>
Message-ID: <dtkft5$puv$2@sea.gmane.org>

Philippe Martin wrote:
> Is there a way to catch  traceback.print_exc() output into a string ?

Presumably using one of the alternatives, like format_exc().  If that's 
not sufficient, maybe some example code to demonstrate what you really 
want would help.

-Peter



From uval at rz.uni-karlsruhe.de  Tue Feb  7 23:22:25 2006
From: uval at rz.uni-karlsruhe.de (=?ISO-8859-1?Q?Sch=FCle_Daniel?=)
Date: Wed, 08 Feb 2006 05:22:25 +0100
Subject: UnboundMethodType and MethodType
Message-ID: <dsbl2g$i1b$1@news2.rz.uni-karlsruhe.de>

Hello all,

 >>> class Q:
...     def bar(self):
...             pass
...
 >>> import types
 >>> types.UnboundMethodType is types.MethodType
True
 >>>
 >>> type(Q.bar)
<type 'instancemethod'>
 >>>
 >>> q = Q()
 >>> type(q.bar)
<type 'instancemethod'>
 >>>
 >>> type(q.bar) is types.UnboundMethodType
True
 >>> q.bar
<bound method Q.bar of <__main__.Q instance at 0x4042756c>>
 >>>

I think is not very consistent
notice q.bar is bounded although type(q.bar)
says it's types.UnboundedMethodType
what do you think?

Regard, Daniel



From fabioz at esss.com.br  Mon Feb  6 07:15:38 2006
From: fabioz at esss.com.br (Fabio Zadrozny)
Date: Mon, 06 Feb 2006 10:15:38 -0200
Subject: fairly large webapp: from Java to Python. experiences?
In-Reply-To: <j88Ff.160530$65.4490774@twister1.libero.it>
References: <1139005746.363918.267370@g47g2000cwa.googlegroups.com>	<1139018653.508049.182020@g43g2000cwa.googlegroups.com>	<prVEf.7358$MF1.4951@fe08.lga>
	<j88Ff.160530$65.4490774@twister1.libero.it>
Message-ID: <43E73DEA.4040801@esss.com.br>

I agree that python code is usually smaller... but what you did is too 
unfair (the code below would be more suitable for the comparrison).

python:
print "%10.2f" % 10

java:
System.out.println(String.format("%10.2f", 10.0));

-- altough for me it would be the same, as I have defined a print 
method... so, it is always something as:
print ("%10.2f", 10) in java for me :-)

What I'm trying to say here is that if you already have a big java app, 
sometimes spending some time trying to refactor it for better 
understanding is more useful than scrapping what already exists 
(especially if you have good test cases)... altough I would reccomend 
jython for new development on that same application.

I guess that the main difference is that python usually makes you do the 
right thing, whereas in java you need to know a lot more about it to 
manage to do the right thing...

Cheers,

Fabio

-- 
Fabio Zadrozny
------------------------------------------------------
Software Developer

ESSS - Engineering Simulation and Scientific Software
www.esss.com.br

PyDev - Python Development Enviroment for Eclipse
http://pydev.sf.net
http://pydev.blogspot.com




Giovanni Bajo wrote:

>John M. Gabriele wrote:
>
>  
>
>>>But once it is
>>>there, Python is a good choice for web apps. Java is slow
>>>      
>>>
>>Slow? They're both dynamic languages, but Java is statically
>>typed (with less work to do at runtime). For long-running processes,
>>I'd guess that Java bytecode executes faster than Python bytecode.
>>    
>>
>
>
>It's not the raw computing performance that counts in this case. I got this
>joke in my mail today:
>
>Python:
>print "%10.2f" % x
>
>Java:
>java.text.NumberFormat formatter = java.text.NumberFormat.getNumberInstance();
>formatter.setMinimumFractionDigits(2);
>formatter.setMaximumFractionDigits(2);
>String s = formatter.format(x);
>for (int i = s.length(); i < 10; i++) System.out.print(' ');
>System.out.print(s);
>
>Let alone the time it takes to write this routine, I'm hundered percent sure
>that the Python's version is also faster at runtime. Python lets you write
>pretty expressive code which is easy to maintain and where the computation cost
>is easily at the C level. Also Python code is pretty bare-metal, so that
>file.write or socket.write go to the syscall immediately. Try that in Java and
>you'll find 30 layers of complex abstractions for doubtful benefits and obvious
>slowness.
>  
>




From jzgoda at o2.usun.pl  Mon Feb 20 15:25:00 2006
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Mon, 20 Feb 2006 21:25:00 +0100
Subject: editor for Python on Linux
In-Reply-To: <dtai6e$23m$2@ariane.blic.net>
References: <dtai6e$23m$2@ariane.blic.net>
Message-ID: <dtd8lo$s2v$1@nemesis.news.tpi.pl>

Mladen Adamovic napisa?(a):

> I wonder which editor or IDE you can recommend me for writing Python
> programs. I tried with jEdit but it isn't perfect.

Komodo isn't perfect either. Nothing is perfect, except God and human
laziness.

I like Komodo, it plays well with my laziness.

-- 
Jarek Zgoda
http://jpa.berlios.de/


From lycka at carmen.se  Wed Feb 15 11:41:51 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 15 Feb 2006 17:41:51 +0100
Subject: Embedding an Application in a Web browser
In-Reply-To: <43f1fa4a$0$4780$636a55ce@news.free.fr>
References: <1139930045.408507.151440@g43g2000cwa.googlegroups.com>
	<43f1fa4a$0$4780$636a55ce@news.free.fr>
Message-ID: <dsvlkf$iq9$1@wake.carmen.se>

bruno at modulix wrote:
> rodmc wrote:
> 
>>Is it possible to embed a Python application within Internet explorer?
> 
> No. Nor in any other browser (except from Grail, but I think this
> doesn't count).

This is simply not true!

Python can work as a Windows scripting language just as VB Script.
That means that IE can use Python just as it can use JScript or
VB Script for client side scripting in the browser.

For instance, see here:
http://www.4guysfromrolla.com/webtech/082201-1.shtml

Another issue is whether this was advisable from a security point
of view... Python isn't written to be safe. I don't want Python
client side scripting enabled in my browser... (Not that I use
IE when I can avoid it...)


From kent at kentsjohnson.com  Sun Feb 12 08:52:18 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Sun, 12 Feb 2006 08:52:18 -0500
Subject: Jython socket typecasting problems
In-Reply-To: <1139678202.221563.308700@f14g2000cwb.googlegroups.com>
References: <1139678202.221563.308700@f14g2000cwb.googlegroups.com>
Message-ID: <43ef3944_3@newspeer2.tds.net>

Mark Fink wrote:
> The cast to Integer for the port does not work either:
> 
> D:\AUT_TEST\workspace\JyFIT>jython fit/JyFitServer2.py "" 1234 23
> ['fit/JyFitServer2.py', '', '1234', '23']
> 
> Traceback (innermost last):
>   File "fit/JyFitServer2.py", line 146, in ?
>   File "fit/JyFitServer2.py", line 31, in run
>   File "fit/JyFitServer2.py", line 96, in establishConnection
>   File "D:\AUT_TEST\Jython21\Lib\socket.py", line 135, in connect
> TypeError: java.net.Socket(): 2nd arg can't be coerced to int
> 
> This is the code section of my server class (I cut this from a Python
> example):
>     def establishConnection(self):
>         self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>         self.socket.connect((self.host, self.port))
> Do I have to use explicit typecasting? How can this be achieved?
> 

This should work if you give correct arguments. For example:
Jython 2.1 on java1.4.2_06 (JIT: null)
Type "copyright", "credits" or "license" for more information.
 >>> import socket
 >>> s=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 >>> s.connect(('www.google.com', 80))
 >>> s.close()

It would be helpful to know what self.host and self.port are. Put
print type(self.host), repr(self.host)
print type(self.port), repr(self.port)

in establishConnection() to print out the values you are using.

If host.port is the command line argument it is a string and you need to 
convert it to int with the int() function.

 >>> s.connect(('www.google.com', '80'))
Traceback (innermost last):
   File "<console>", line 1, in ?
   File "C:\Downloads\Java\jython-2.1\Lib\socket.py", line 135, in connect
TypeError: java.net.Socket(): 1st arg can't be coerced to 
java.net.InetAddress or String

Note it complains about the first arg; this may well be your error.

In general Python does not coerce argumentt types for you. Jython will 
translate between Java and Python types but it won't go as far as 
converting a String to an int.

Kent


From steve at holdenweb.com  Wed Feb  8 07:30:57 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 08 Feb 2006 07:30:57 -0500
Subject: module with __call__ defined is not callable?
In-Reply-To: <1139401113.301377.21520@g47g2000cwa.googlegroups.com>
References: <mailman.1580.1139367500.27775.python-list@python.org>	<pan.2006.02.08.10.21.24.46790@REMOVETHIScyber.com.au>	<1139394463.255902.168960@f14g2000cwb.googlegroups.com>	<mailman.1591.1139400885.27775.python-list@python.org>
	<1139401113.301377.21520@g47g2000cwa.googlegroups.com>
Message-ID: <dscoa3$133$1@sea.gmane.org>

Fuzzyman wrote:
> Steve Holden wrote:
[...]
>>
>>The pursuit of orthogonality, while admirable, can lead to insanity if
>>pushed too far.
>>
> 
> 
> Sure - feel free to venture as far down the road of insanity as you
> like :-) To pursue your analogy, why don't we answer all usenet posts
> by pushing suggestions to ridiculous levels ? ;-)
> 
Right, and publish cartoons of Larry Wall where his hat is a bomb. Then 
the perlmongers will burn the Googleplex down?

> What would actually be the problem with allowing modules to define a
> __call__ though ? This would allow for nice clean namespaces at the
> module level.
> 
What's clean about defining __call__() and calling the module name 
rather than defining functions and calling them? Why should one specific 
function in a module be promoted to this special status? How many 
modules have precisely one function?

> Ok, so there are other ways of doing it - but it's not at all
> illogical.
> 
I was merely trying to suggest that just because something *can* be done 
doesn't mean it *should* be done. Perhaps I went a little over the top.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From scherbi at gmail.com  Mon Feb  6 20:38:34 2006
From: scherbi at gmail.com (Bill Scherer)
Date: Mon, 6 Feb 2006 20:38:34 -0500
Subject: ANN: pyfuncgen
Message-ID: <8b970bd0602061738y4e625909ya4fd3c22bff2fb65@mail.gmail.com>

Hello -

I'm pleased to announce my first sourceforge project, pyfuncgen.

pyfuncgen is a virtual Function Generator. I've created it to assist me with
some tube audio amplifier testing.
Currently it generates sine, square, and sawtooth waveforms. A gui (pyqt)
and a cli are included.
The cli depends only upon stdlib components. One of them you may or may not
have is ossaudiodev,
so this release(0.3) will likely only run on Linux or FreeBSD.

I invite you to try it out and send feedback.
Please note that the audio device is currently hardcoded to /dev/dsp1, so
you may need to edit that for your particular hardware setup.

I am also looking for some help from interested parties; see the NOTES file
for more info.

You can find it here:
    http://pyfuncgen.sourceforge.net


Thanks!

Bill Scherer
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From g.brandl-nospam at gmx.net  Sat Feb 18 15:32:16 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Sat, 18 Feb 2006 21:32:16 +0100
Subject: define loop statement?
In-Reply-To: <T4LJf.14256$915.10437@southeast.rr.com>
References: <lW4Jf.31559$3V4.8390@trnddc06>
	<T4LJf.14256$915.10437@southeast.rr.com>
Message-ID: <45peigF7nemdU1@individual.net>

Jeffrey Schwab wrote:

> class Loop:
> 	def __init__(self, n):
> 		self.n = n
> 	def __call__(self):
> 		self.n = self.n - 1
> 		return self.n != 0
> 
> 
> if __name__ == '__main__':
> 	loop = Loop(10)
> 	while loop:
> 		print "OK"

Seems you forgot "()" after "while loop" above.

Georg


From claird at lairds.us  Thu Feb  9 17:08:03 2006
From: claird at lairds.us (Cameron Laird)
Date: Thu, 09 Feb 2006 22:08:03 GMT
Subject: get output of cmd-line command under MS windows
References: <slrndujm8k.2uf.mac@news.calmar.ws>
	<mailman.1598.1139411970.27775.python-list@python.org>
Message-ID: <9eqsb3-avr.ln1@lairds.us>

In article <mailman.1598.1139411970.27775.python-list at python.org>,
Bernard Lebel  <3dbernard at gmail.com> wrote:
>You should give a go to os.popen( <system command here> ). Article
>6.1.2 and 6.1.3 in the Python Library doc.
>
>I recently wrote a program that would create a pipe using the popen()
>method, and would enter a while loop. At each iteration, it would read
>one line of the pipe output, and the loop would break when it gets an
>empty line (indicating the running application is not running in this
>case).
>
>Example:
>
>import os
>
>oPipe = os.popen( "run C:/program files/my app/executable.exe" )
>
>while 1:
>	sLine = oPipe.read()
>	print sLine
>	if sLine == '':
>		print 'No more line from pipe, exit.'
>		break
			.
			.
			.
If I understand you correctly, this presentation depends on
  executable.exe
not emitting any blank lines.  Some legitimate command-line
executables *do* have occasion to put out blank lines, though 
...


From andre.roberge at gmail.com  Mon Feb 27 07:55:15 2006
From: andre.roberge at gmail.com (=?iso-8859-1?B?QW5kcuk=?=)
Date: 27 Feb 2006 04:55:15 -0800
Subject: wxPython: help(wx) causes segfaulting?
In-Reply-To: <usi502h2ltmbvt7e58blv4hhsitseg565u@4ax.com>
References: <mailman.2457.1140992731.27775.python-list@python.org>
	<usi502h2ltmbvt7e58blv4hhsitseg565u@4ax.com>
Message-ID: <1141044915.517203.16390@i40g2000cwc.googlegroups.com>


Franz Steinhaeusler wrote:
> On Sun, 26 Feb 2006 10:35:13 -0600, Tim Chase
> <python.list at tim.thechases.com> wrote:
>
> >Trying to get my feet wet with wxPython (moving from just
> >command-line apps), I tried the obvious (or, at least to me
> >was obvious):
> >
> >Start python, "import wx" and then do a "help(wx)" to see
> >what it can tell me.
>
> I tried it on Windows Xp, and I got also a traceback:
>
> >>> help (wx)
> Traceback (most recent call last):
[snip]

I don't seem to have any problem (except that it takes a while to load)

C:\Documents and Settings\Andr?>python
ActivePython 2.4.2 Build 248 (ActiveState Corp.) based on
Python 2.4.2 (#67, Oct 30 2005, 16:11:18) [MSC v.1310 32 bit (Intel)]
on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import wx
>>> help(wx)
Help on package wx:

NAME
    wx

FILE
    c:\python24\lib\site-packages\wx-2.6-msw-unicode\wx\__init__.py

DESCRIPTION

#---------------------------------------------------------------------------
-
    # Name:         __init__.py
    # Purpose:      The presence of this file turns this directory into
a
    #               Python package.
    #
    # Author:       Robin Dunn
    #
    # Created:      8-Aug-1998
    # RCS-ID:       $Id: __init__.py,v 1.11 2005/06/02 03:31:17 RD Exp
$
    # Copyright:    (c) 1998 by Total Control Software
    # Licence:      wxWindows license

#---------------------------------------------------------------------------
-

PACKAGE CONTENTS
    __version__
    _activex
    _animate
    _calendar
-- More  --

However, please note that your (Original Poster) time would probably be
better invested by looking at the very comprehensive wxPython demo (it
may require a separate download).

Andr?



From UrsusMaximus at gmail.com  Sun Feb  5 17:49:37 2006
From: UrsusMaximus at gmail.com (UrsusMaximus at gmail.com)
Date: 5 Feb 2006 14:49:37 -0800
Subject: Python, GUI, and GTK+
In-Reply-To: <mailman.1457.1139179252.27775.python-list@python.org>
References: <mailman.1457.1139179252.27775.python-list@python.org>
Message-ID: <1139179777.574873.225380@g47g2000cwa.googlegroups.com>

You will find links to 12 pyGtk tutorials here :

www.awaretek.com/tutorials.html


Clck on:
GUI Programming: pyGTK and Gnome (12)



From John.Marshall at ec.gc.ca  Fri Feb 17 13:21:31 2006
From: John.Marshall at ec.gc.ca (John Marshall)
Date: Fri, 17 Feb 2006 18:21:31 +0000
Subject: Apparent eval() leak for python 2.3.5
Message-ID: <43F6142B.10001@ec.gc.ca>

Hi,

I am reposting this message from python-dev.

Could someone please test the code below
to verify that there is indeed a problem
with eval() under python 2.3.5. I have
rebuilt python 2.3.5 under the latest debian
and under RH 7.3 (in case the problem is
in system libraries).

The following code causes the virtual memory
allocation to constantly increase until there
is no more memory left (the VIRT column of the
'top' utility display).

-----
#! /usr/bin/env python
#
# evalleak.py

def builddict():
     d = {}
     for i in xrange(10000):
         d[i] = { "int": 0, "str": "nada", "dict": {} }
     return d

if __name__ == "__main__":
     d = builddict()
     st = str(d)
     print "len(st): %d" % len(st)
     while 1:
         d = eval(st)
-----

Thanks,
John


From eoinrogers at gmail.com  Sun Feb 12 15:24:34 2006
From: eoinrogers at gmail.com (Byte)
Date: 12 Feb 2006 12:24:34 -0800
Subject: Small newbie question
In-Reply-To: <mailman.1790.1139775399.27775.python-list@python.org>
References: <1139774104.070375.235480@z14g2000cwz.googlegroups.com>
	<mailman.1790.1139775399.27775.python-list@python.org>
Message-ID: <1139775874.419440.87890@g43g2000cwa.googlegroups.com>

Great stuff, thanks:

 -- /usr/bin/byte



From chris.lasher at gmail.com  Tue Feb 21 09:58:08 2006
From: chris.lasher at gmail.com (Chris Lasher)
Date: 21 Feb 2006 06:58:08 -0800
Subject: Zope/Plone - Is it the right solution?
In-Reply-To: <1140532818.195281.316580@g44g2000cwa.googlegroups.com>
References: <1140532818.195281.316580@g44g2000cwa.googlegroups.com>
Message-ID: <1140533888.834791.14450@g47g2000cwa.googlegroups.com>

You may want to look at either of the popular frameworks, TurboGears
http://www.turbogears.org/ or Django http://www.djangoproject.com/

I have very little experience with both, but I decided to try learning
the Django framework after watching the Snakes and Rubies videos. (See
http://www.djangoproject.com/snakesandrubies/ ) I am working my way
through the Django tutorials and am very impressed and looking forward
to deploying it on my own site. The admin interface that you get
basically "free" is a very slick touch, especially with all the
widgets. My recommendation is to check out Django's admin interface
(see Adrian Holovaty's presentation of Django in Snakes and Rubies and
http://www.djangoproject.com/documentation/tutorial2/ ) and see if that
won't do the trick for allowing easy content contribution without the
contributors having to know any of the Python, HTML, or CSS behind the
pages.

Chris



From utement at gmail.com  Wed Feb  8 17:08:09 2006
From: utement at gmail.com (utement at gmail.com)
Date: 8 Feb 2006 14:08:09 -0800
Subject: What editor shall I use?
In-Reply-To: <1139410110.389122.215400@z14g2000cwz.googlegroups.com>
References: <1139410110.389122.215400@z14g2000cwz.googlegroups.com>
Message-ID: <1139436489.029597.254820@g43g2000cwa.googlegroups.com>

I use JEdit and I like it very much.

http://www.jedit.org/

Uros



From Peter.Mayne at hp.com  Thu Feb 23 03:57:05 2006
From: Peter.Mayne at hp.com (Peter Mayne)
Date: Thu, 23 Feb 2006 19:57:05 +1100
Subject: Python vs. Lisp -- please explain
In-Reply-To: <87bqwzjys9.fsf@wilson.homeunix.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com> <43fbc788@usenet01.boi.hp.com>
	<87u0ar3gba.fsf@wilson.homeunix.com>
	<pan.2006.02.22.11.35.14.90948@REMOVETHIScyber.com.au>
	<87bqwzjys9.fsf@wilson.homeunix.com>
Message-ID: <43fe7592@usenet01.boi.hp.com>

Torsten Bronger wrote:
> 
>>>> Another example: is Java the bytecode, which is compiled from
>>>> Java the language, interpreted or not? Even when the HotSpot JIT
>>>> cuts in?
>>> It is partly interpreted and partly compiled.  That's why it's
>>> faster than Python.
>> But Python is partly interpreted and partly compiled too
> 
> It's byte-compiled for a VM, that's not the same, and you know it.

Do you mean that Python is byte-compiled for a VM, and not Java, or 
vice-versa?

> I agree that the distinction between interpreted and compiled
> languages is not as clear as between positiv and negative numbers,
> however, neither anybody has claimed that so far, nor it is
> necessary.  It must be *practical*, i.e. a useful rule of thumb for
> decision making.  If you really know all implications (pros and
> cons) of interpreted languages, it's are very useful rule in my
> opinion.

So what kind of practical decisions are you trying to make? What kind of 
implications are useful to you?

PJDM


From onurb at xiludom.gro  Mon Feb 20 04:05:24 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Mon, 20 Feb 2006 10:05:24 +0100
Subject: Python vs. Lisp -- please explain
In-Reply-To: <1140382936.808627.40300@o13g2000cwo.googlegroups.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<1140382936.808627.40300@o13g2000cwo.googlegroups.com>
Message-ID: <43f98676$0$31888$636a55ce@news.free.fr>

Paul Boddie wrote:
(snip)

> I'm not sure why people get all defensive about Python's
> interpreted/scripting designation

Because it carries a negative connotation of "slow toy language not
suitable for 'serious' tasks". Dynamicity apart, CPython's
implementation is much closer to Java than to bash scripts - but still,
as soon as you say "interpreted, scripting", peoples think "not serious".

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From john_sips_teaz at yahooz.com  Mon Feb 27 02:09:16 2006
From: john_sips_teaz at yahooz.com (John M. Gabriele)
Date: Mon, 27 Feb 2006 02:09:16 -0500
Subject: looking for a simpe plotting module
In-Reply-To: <mailman.2443.1140910774.27775.python-list@python.org>
References: <001201c63a5f$65781330$2f01a8c0@m8d4477f3de884>
	<mailman.2443.1140910774.27775.python-list@python.org>
Message-ID: <aExMf.3389$6V.1213@fe09.lga>

Henrique Ferreiro wrote:
> 
> O S?b, 25-02-2006 ?s 15:01 -0800, MARK LEEDS escribiu:
> 
>>i'm pretty much a python beginner so can anyone recommend a plooting
>>package in python ( simple foating  numbers 
>>that makes lines or dots with a yaxis and an an xaxis. i don't need
>>fancy drawings ) that is a built in module 
>>in python ?  i am using python 2.4 in linux if that matters. thanks.
>>
>>
>>
>>-- 
>>http://mail.python.org/mailman/listinfo/python-list
> 
> matplotlib is an excellent library which uses the syntax of matlab
> plots.
> 
> http://matplotlib.sourceforge.net


You might also have a look at PyChart:
http://wiki.python.org/moin/PyChart


-- 
(remove zeez if demunging email address)


From mlist at fastwebnet.it  Sat Feb 11 08:55:42 2006
From: mlist at fastwebnet.it (billie)
Date: Sat, 11 Feb 2006 14:55:42 +0100
Subject: Netstat in python. Does it's possible?
Message-ID: <s1mHf.5180$9G6.428@tornado.fastwebnet.it>

Hi all. I don't know if Python is good for this kind of jobs but I'm 
wondering if it's possible emulate the "netstat" command in Python.
I'd need to know if a certain executable opened a socket and, in that case, 
I'd like to know what kind of socket it uses (TCP or UDP), its src/dst PORT, 
and the current STATE of the connection (listening, established, SYN 
sent...).

Thanks in advance. 




From albert at compuscan.co.za  Thu Feb  9 01:13:42 2006
From: albert at compuscan.co.za (Albert Leibbrandt)
Date: Thu, 09 Feb 2006 08:13:42 +0200
Subject: only a simple xml reader <tag:id>value</tag:id>
In-Reply-To: <1139409929.944215.203740@z14g2000cwz.googlegroups.com>
References: <1139387993.478950.76410@g44g2000cwa.googlegroups.com>	<1139409218.480843.317570@g43g2000cwa.googlegroups.com>
	<1139409929.944215.203740@z14g2000cwz.googlegroups.com>
Message-ID: <43EADD96.20205@compuscan.co.za>

martijn at gamecreators.nl wrote:

>I'm newbie with that xml stuff.
>
>The only thing I must read is the response I get from a EPP server.
>A response like this:
>
><?xml version="1.0" encoding="UTF-8"?>
><epp xmlns=" http://www.eurid.eu/xml/epp/epp-1.0"
>xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>xmlns:contact="http://www.eurid.eu/xml/epp/contact-1.0"
>xmlns:domain="http://www.eurid.eu/xml/epp/domain-1.0"
>xmlns:eurid="http://www.eurid.eu/xml/epp/eurid-1.0"
>xmlns:nsgroup="http://www.eurid.eu/xml/epp/nsgroup-1.0"
>xsi:schemaLocation="http://www.eurid.eu/xml/epp/epp-1.0 epp-1.0.xsd
>http://www.eurid.eu/xml/epp/contact-1.0 contact-1.0.xsd
>http://www.eurid.eu/xml/epp/domain-1.0 domain-1.0.xsd
>http://www.eurid.eu/xml/epp/eurid-1.0 eurid-1.0.xsd
>http://www.eurid.eu/xml/epp/nsgroup-1.0 nsgroup-1.0.xsd">
><response>
><result code="1500">
><msg>Command completed successfully; ending session</msg>
></result>
><resData>
><domain:appData>
><domain:name>c-and-a.eu</domain:name>
><domain:reference> c-and-a_1</domain:reference>
><domain:code>2565100006029999</domain:code>
><domain:crDate>2005-11-08T14:51:08.929Z</domain:crDate>
></domain:appData>
></resData>
><extension>
><eurid:ext>
><eurid:result>
><eurid:msg>OK</dnsbe:msg>
></eurid:result>
></eurid:ext>
></extension>
><trID>
><clTRID>clientref-12310026</clTRID>
><svTRID>eurid-1589</svTRID>
></trID>
></response>
></epp>
>----------------
>//<result code="1500">
>//<msg>Command completed successfully; ending session</msg>
>
>what is the official/best way to handle/parse such xml response ?
>
>Thats maybe a better question
>
>  
>
try something like this:

import xml.dom.minidom as dom
doc = dom.parseString("""<?xml version="1.0"?>
<title>The Fascist Menace</title>""")
print doc.getElementsByTagName('title')[0].childNodes[0].data



From steve at holdenweb.com  Thu Feb  9 07:21:06 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 09 Feb 2006 07:21:06 -0500
Subject: Inserting record with Microsoft Access
In-Reply-To: <43EB0355.9000603@compuscan.co.za>
References: <dse868+n819@eGroups.com> <43EB0355.9000603@compuscan.co.za>
Message-ID: <dsfc3j$d90$1@sea.gmane.org>

Albert Leibbrandt wrote:
> 
> jeffhg582003 wrote:
> 
> 
>>Hi,
>>
>>I am developing a python script which add records to 
>>a microsoft access tables. All my tables have autogenerated number
>>fields. I am trying to capture the number generated from the insert but
>>I am not exactly sure how to do that after an insert.
>>
> I had to do something similiar in sql server and the experts back then 
> told me that the only way is to write a stored procedure. aparently sql 
> server does not have sequences and I am guessing that access is the same.
> 
Well the experts were wrong, I suspect. Try

   SELECT @@IDENTITY

to return the autonumber key created by the most recent INSERT.

I believe this works for both SQL Server and Access (doesn't anyone use 
Google any more?).

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From danmcleran at yahoo.com  Mon Feb 20 15:41:13 2006
From: danmcleran at yahoo.com (danmcleran at yahoo.com)
Date: 20 Feb 2006 12:41:13 -0800
Subject: Processing text using python
In-Reply-To: <7umdnQWGhLeYb2TenZ2dnUVZ_tKdnZ2d@comcast.com>
References: <1140451760.998278.90430@g43g2000cwa.googlegroups.com>
	<1140453379.593658.160770@g44g2000cwa.googlegroups.com>
	<7umdnQWGhLeYb2TenZ2dnUVZ_tKdnZ2d@comcast.com>
Message-ID: <1140468073.047446.85500@f14g2000cwb.googlegroups.com>

Sure. There's probably a thousand ways to do this.



From stefan.neumann at freiheit.com  Thu Feb  9 10:09:22 2006
From: stefan.neumann at freiheit.com (Stefan Neumann)
Date: Thu, 09 Feb 2006 16:09:22 +0100
Subject: removing characters before writing to file
In-Reply-To: <1139452501.421306.44080@f14g2000cwb.googlegroups.com>
References: <1139452501.421306.44080@f14g2000cwb.googlegroups.com>
Message-ID: <43EB5B22.1010601@freiheit.com>

eight02645999 at yahoo.com wrote:
> hi
> i have some output that returns a lines of tuples eg
>
> ('sometext1', 1421248118, 1, 'P ')
> ('sometext2', 1421248338, 2, 'S ')
> and so on
> ....
>

If the braces are always at the begining and at the end of the string,
you could also use:

	>>> "('sometext1', 1421248118, 1, 'P ')"[1:-1]
	"'sometext1', 1421248118, 1, 'P '"

cheers
	Stefan
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From deets at nospam.web.de  Thu Feb  2 18:28:40 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 03 Feb 2006 00:28:40 +0100
Subject: PyQt: QListView how to retrieve selected items?
In-Reply-To: <1138920061.665124.169280@g43g2000cwa.googlegroups.com>
References: <1138907537.417067.228570@z14g2000cwz.googlegroups.com>
	<44f50sF1u9c3U1@uni-berlin.de>
	<1138916365.766264.152280@z14g2000cwz.googlegroups.com>
	<44fdrsF1tinnU1@uni-berlin.de>
	<1138920061.665124.169280@g43g2000cwa.googlegroups.com>
Message-ID: <44fit9F1v72lU1@uni-berlin.de>

Flavio schrieb:
>> Who has created these items? Obviously you, so you _can_ store the list
>> of selected items.
> 
> well yeah, but the Idea was to let the user select(through the widget)
> a subset of the original list and then access that subset...
> 
>> Or you use the equally well documented QListViewItemIterator to traverse
>> the list of items.
> 
> Alright! Now you've hit the jackpot! I didn't know that class! There is
> no  reference to it in the QListView docs! This can solve my problem
> (combined with isSelected()), though not as elegantly or efficiently as
> having direct access to the set of selected items which already exists
> but is not accessible...

You are wrong thinking that this less efficient - on the contrary. It 
might be less convenient.

The problem is that updating the selected-item-list (which can be a 
tree, mind you!) on every user's click will be O(n). Maybe O(log(n)), 
but that's with tricks and I'd have to think about that.

Additionally, maintaining that list in case of addition, deletion and so 
on will always call for rebuilds.

In the end it might be that your user selects and deselects an item 100 
times. But only when she hits the "export this list"-button you're 
actually interested in the always-up-to-date data. So, efficiency is not 
the problem here.

Diez


From name at example.com  Thu Feb  9 15:45:15 2006
From: name at example.com (name)
Date: Thu, 09 Feb 2006 21:45:15 +0100
Subject: Fuzzy Lookups
In-Reply-To: <mailman.1289.1138722708.27775.python-list@python.org>
References: <1138635665.956131.130630@f14g2000cwb.googlegroups.com>	<1138670927.377396.78090@g44g2000cwa.googlegroups.com>	<mailman.1266.1138680617.27775.python-list@python.org>	<1138721690.283464.71570@g14g2000cwa.googlegroups.com>
	<mailman.1289.1138722708.27775.python-list@python.org>
Message-ID: <43EBA9DB.2030506@example.com>

Gregory Pi?ero ha scritto:
:
> If anyone would be kind enough to improve it I'd love to have these
> features but I'm swamped this week!
> 
> - MD5 checking for find exact matches regardless of name
> - Put each set of duplicates in its own subfolder.

Done? http://pyfdupes.sourceforge.net/

Bye,
luca


From cito at online.de  Sat Feb 18 07:20:53 2006
From: cito at online.de (Christoph Zwerschke)
Date: Sat, 18 Feb 2006 13:20:53 +0100
Subject: embedding python in HTML
In-Reply-To: <t6q9v1p2qcr0ntsau8i6q5glk89pfb4epq@4ax.com>
References: <GD5Jf.1637$No6.38292@news.tufts.edu>
	<t6q9v1p2qcr0ntsau8i6q5glk89pfb4epq@4ax.com>
Message-ID: <dt73f4$vcd$1@online.de>

Rene Pijlman wrote:
> There's also PSP:
> http://www.ciobriefings.com/psp/

Another incarnation of PSP can be used as part of Webware for Python 
(http://www.w4py.org).

And one of the more modern solutions that should be mentioned is Kid 
(http://kid.lesscode.org).

-- Christoph


From yawgmoth7 at gmail.com  Thu Feb 23 19:08:44 2006
From: yawgmoth7 at gmail.com (yawgmoth7)
Date: Fri, 24 Feb 2006 00:08:44 +0000
Subject: IRC Bot trouble..
Message-ID: <cef393a0602231608p295894f1o1af737bc03bc43c8@mail.gmail.com>

I'm currently writing a IRC bot for fun...here is the code that I have
writen so far:

import sys
import socket
import string
import time
HOST="irc.freenode.net"
PORT=6667
NICK="PapaJorgio_"
IDENT="Papa"
REALNAME="Jorgio"
CHANNEL = "#holder"
buffer = ""
clientsock=socket.socket()
clientsock.connect((HOST, PORT))
clientsock.send("NICK %s\r\n" % NICK)
clientsock.send("USER %s %s bla :%s\r\n" % (IDENT, HOST, REALNAME))
clientsock.send("JOIN %s\r\n" % (CHANNEL))
clientsock.send("PRIVMSG #holder :There's a new AI in town foo.\r\n")
while 1:
	buffer=buffer+clientsock.recv(1024)
	temp=string.split(buffer, "\n")
	print buffer
	buffer=temp.pop()
	for line in temp:
			print "|%s|" % repr(line)
			line=string.rstrip(line)
			if "-part" in line:
					clientsock.send("PART #holder :I am leet.\r\n")
			elif "hello" in line:
				clientsock.send("PRIVMSG #holder :Hey...\r\n")
			elif "BlueInferno" in line:
				clientsock.send("PRIVMSG #holder :OH NOES! >:o\r\n")
			elif "-whois" in line:
					query = line.split()[4]
					clientsock.send("WHOIS eff.org %s\r\n" % query)
					buffer2 = clientsock.recv(1024)
					clientsock.send("PRIVMSG #holder :%s\r\n" % buffer2)
			elif "-nick" in line:
				nick = line.split()[4]
				clientsock.send("NICK %s\n" % nick)
			elif "PING" in line:
				clientsock.send("PONG %s\r\n" % line[1])

Now...it is in a very early stage (started writing it maybe 45 minutes
ago). But, I have a few questions regarding some of the code that is
not working. One of the things I ham having a big trouble with is the
-whois part. I know that I cannot assign a variable like that (Since
socket's don't really work that way..I believe?). Basically I want to
it run a -whois query and print it to the channel..but I can not get
it to print it to the channel.Another problem is the 'PING' part. I
have no clue why it doesn't respond with PONG...it should work. I am
our of ideas >:(. Does anyone have any suggestions? Thank you for your
time/help.


From steve at REMOVETHIScyber.com.au  Thu Feb  2 06:08:33 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Thu, 02 Feb 2006 22:08:33 +1100
Subject: OO conventions
References: <mailman.1334.1138833641.27775.python-list@python.org>
Message-ID: <pan.2006.02.02.11.08.33.964@REMOVETHIScyber.com.au>

On Wed, 01 Feb 2006 23:40:37 +0100, Daniel Nogradi wrote:

> I'm relatively new to object oriented programming, so get confused
> about its usage once in a while. Suppose there is a class Image that
> has a number of methods, rotate, open, verify, read, close, etc. Then
> to use this class my natural guess would be to have something like
> 
> image = Image( )

Now you have an "image" object. What is it?

Answer: it isn't an image at all, not in the plain English sense. (Or if
it is, it is an arbitrary "default image" picked by the class designer.)

> image.read( "myfile.jpg" )

And now, at long last, the image object actually is an image. So why make
this a two step process? Whatever the Image() initialization does, why
can't it be done automatically when you read the file?

[snip]

> Perhaps the real Image class of PIL doesn't have these methods exactly,
> but doesn't matter, my point is the way it works. Is it normal that
> instead of first creating an instance of a class, it starts right away
> with one its methods? I of course understand that the PIL people simply
> made a choice that their module works this way, period, but I'm just
> wondering if it wouldn't have been more "logical" to do it along the way
> of my first example.

It seems to me that the choice depends on the data you are handling, plus
of course the class designer's choice. (Dare I say it, whim.)

If a class has a natural, obvious default state (e.g. a mutable string
class might start off empty, a mutable int class might start off as zero,
a binary tree might start off as an empty node with no children) then it
makes sense to initialise the class, then add your data.

But if the class has no natural default state, then it makes no sense to
create an "empty object" with no data, a "non-image image" so to speak.

In other words, if you find yourself writing methods like this:

class Klass:
    def foo(self):
        if self.data is None:
            raise KlassError("Can't foo an uninitialized Klass object.")
        else:
            # do something

then you are just doing pointless make-work to fit a convention that
doesn't make sense for your class. 



-- 
Steven.



From swrittenb at gmail.com  Wed Feb  8 18:15:32 2006
From: swrittenb at gmail.com (Swroteb)
Date: 8 Feb 2006 15:15:32 -0800
Subject: Pulling all n-sized combinations from a list
In-Reply-To: <7xr76dwiy3.fsf@ruckus.brouhaha.com>
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>
	<7x7j85czje.fsf@ruckus.brouhaha.com>
	<1139436433.439927.175100@g47g2000cwa.googlegroups.com>
	<7xr76dwiy3.fsf@ruckus.brouhaha.com>
Message-ID: <1139440532.158500.16930@z14g2000cwz.googlegroups.com>


Paul Rubin wrote:
> I think the natural approach is to make a generator that yields a
> 5-tuple for each combination, and then have your application iterate
> over that generator.  Here's my version:
>
>     def comb(x,n):
>         """Generate combinations of n items from list x"""
>         if n==0:
>             yield []
>             return
>         for i in xrange(len(x)-n+1):
>             for r in comb(x[i+1:], n-1):
>                 yield [x[i]] + r
>
>     for c in comb([1,2,3,4,5], 3):
>         print c
>
> The output is:
>     >>>
>     [1, 2, 3]
>     [1, 2, 4]
>     [1, 2, 5]
>     [1, 3, 4]
>     [1, 3, 5]
>     [1, 4, 5]
>     [2, 3, 4]
>     [2, 3, 5]
>     [2, 4, 5]
>     [3, 4, 5]
>     >>>

Ah, this definitely seems to work!  It's a lot nicer in appearance than
my previous code, that's for sure.  It actually runs in approximately
the same amount of time though.  So, using your comb method, I have the
following code now:

        myCombinations = comb(myList, 5)
        for a, b, c, d, e in myCombinations:
            # my code

myList is 48 elements in size, so I'm going to get 1712304
combinations.  From what I can tell, my speed problems aren't in the
list generation anymore.

Thanks for the assistance, Paul!  I appreciate it.  :)



From bob.python at yahoo.com  Thu Feb 23 17:53:32 2006
From: bob.python at yahoo.com (Bob)
Date: 23 Feb 2006 14:53:32 -0800
Subject: How would you open this file?
Message-ID: <1140735212.419265.219980@e56g2000cwe.googlegroups.com>

I want to open a file in a function and pass the file back to main so
another function can manipulate the file, something like this:

# begin
def open_file()
  filename=open(options.filename_input,'r')
  return filename

open_file()
print filename.read()
filename.close()
# end

But this doesn't work... It appears that "open_file()" needs a
variable, but in order to pass a variable to "open_file()" I first need
a variable... but I would rather have the function send me "filename"
without creating it main. Is that possible?

Is there a better way to have a function open a file and pass the file
back to main than what I am trying to do?  Thanks!



From nick at craig-wood.com  Sat Feb  4 12:30:04 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Sat, 04 Feb 2006 11:30:04 -0600
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<GrGdnYYzsbcBLH_eRVn-iQ@comcast.com>
	<mailman.1372.1138945618.27775.python-list@python.org>
Message-ID: <slrndu9nes.vds.nick@irishsea.home.craig-wood.com>

Terry Hancock <hancock at anansispaceworks.com> wrote:
>  On Thu, 02 Feb 2006 19:27:55 -0600
>  DH <no at spam.com> wrote:
> > But I think most people who don't like the extraneous
> > 'self' in python  just consider it a minor inconvenience
> > and don't even notice it after  using python for a while. 
> 
>  After messing around with Javascript (many magical
>  variables that suddenly show up in your namespaces!), I
>  began to *seriously* appreciate Python's design.  Having
>  self as an explicit parameter is beautiful self-documenting
>  design.

I have to agree...

Here is my experience with the same idea in C++...

I've converted lots of C code written in an object oriented style into
C++.  In C you pass round a pointer to a struct, which gets
transformed into the new class on conversion.  Typically the code is
then full of this->member = that, etc.  This is the python equivalent
of self.member = that.  At this point I usually remove all the this->
from the code which then causes it to malfunction horribly at run-time
(it compiles fine) because of all the name space clashes between the
things in the class and the local variables.  The compiler doesn't
warn about this - its perfectly legal C++.

In a lot of big C++ programs various conventions are used to try to
help with this - naming all parameters to functions _name rather than
name, or using this->member rather than member.  The python way of
enforcing self.member is much cleaner and never comes back to bite you!

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From zevlg at yandex.ru  Sun Feb 26 14:26:59 2006
From: zevlg at yandex.ru (Zajcev Evgeny)
Date: Sun, 26 Feb 2006 22:26:59 +0300
Subject: An isalpha() that accepts underscores as well
References: <1140875695.053987.158710@t39g2000cwt.googlegroups.com>
	<cone.1140889811.930498.40672.5001@35st-server.simplicato.com>
	<mailman.2449.1140979860.27775.python-list@python.org>
Message-ID: <87bqwtor98.fsf@yandex.ru>

egbert <egbert.bouwman at hccnet.nl> writes:

> The string method isalpha() returns True when all characters in the
> string are alphabetic. Unfortunately the underscore is not alphabetic.
> A function that does what I need is:
>
> def alfa_(w):
>     return "".join(w.split("_")).isalpha()
>
> but for the kind of strings that I have this is about ten times
> slower than isalpha() sec. Any suggestions ?
> Thanks.

what about

    def alfa_(w):
        return w.isalpha() or w.find('_') != -1

? but yes it does scan `w' twice ..

You could also do something like:

    def alfa_(w):
        for c in w:
            if not c.isalpha() and not c == '_':
               return False
        return True

-- 
lg


From tbonejo at gmail.com  Sat Feb 18 16:34:54 2006
From: tbonejo at gmail.com (tbonejo at gmail.com)
Date: 18 Feb 2006 13:34:54 -0800
Subject: Tab Character?
Message-ID: <1140298494.225985.103510@g47g2000cwa.googlegroups.com>

How do I make a tab character in code to split a line read with tabs in
it?


Thanks.

Tom



From hancock at anansispaceworks.com  Wed Feb  1 01:31:36 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Wed, 1 Feb 2006 00:31:36 -0600
Subject: python-list@python.org
In-Reply-To: <6.2.3.4.2.20060131201024.030601f0@blue-cove.com>
References: <mailman.4400.1138753503.27774.python-list@python.org>
	<6.2.3.4.2.20060131201024.030601f0@blue-cove.com>
Message-ID: <20060201003136.3d502d76@samwise.anansi>

On Tue, 31 Jan 2006 21:02:48 -0800
RayS <rays at blue-cove.com> wrote:
> Yes, I had seen it, and it looks well developed - but - it
> _requires_  Windows COM. (I do use Win32 and ctypes for
> talking to interface  cards and such, that I actually get
> paid for) but even the company I  do it for is migrating
> to LINUX (slowly) by customer demand (!) and I  guess
> don't want to do new COM projects.

FWIW, for me, "Windows only"="write off", so I'm glad you're
not going this route.

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From onurb at xiludom.gro  Mon Feb 20 08:32:38 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Mon, 20 Feb 2006 14:32:38 +0100
Subject: How many web framework for python ?
In-Reply-To: <1hazzon.19mvhkv6sr8wiN%aleaxit@yahoo.com>
References: <mailman.2085.1140244423.27775.python-list@python.org>
	<43f8718e$0$7344$626a54ce@news.free.fr>
	<1hazzon.19mvhkv6sr8wiN%aleaxit@yahoo.com>
Message-ID: <43f9c518$0$3317$636a55ce@news.free.fr>

Alex Martelli wrote:
> Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote:
>    ...
> 
>>>There are very good web framework for java and ruby ,
>>>Is there one for python ?
>>
>>In fact, there are actually too much *good* python web frameworks.
> 
> 
> Dear Mr. BDFL,
> 
> there are too many good web frameworks nowadays. Please eliminate three.
> 

Seems like I should have added a smiley somewhere...

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From donn at drizzle.com  Sat Feb 11 17:02:19 2006
From: donn at drizzle.com (Donn Cave)
Date: Sat, 11 Feb 2006 22:02:19 -0000
Subject: Jython socket typecasting problems
References: <1139678202.221563.308700@f14g2000cwb.googlegroups.com>
	<456l92F554abU1@uni-berlin.de>
Message-ID: <1139695338.888932@jetspin.drizzle.com>

Quoth "Diez B. Roggisch" <deets at nospam.web.de>:
| > This is the code section of my server class (I cut this from a Python
| > example):
| >     def establishConnection(self):
| >         self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
| >         self.socket.connect((self.host, self.port))
| > Do I have to use explicit typecasting? How can this be achieved?
|
| There is no such thing as explicit casting in python. You can coerce 
| values to values of another type - e.g. float("1.0"), and there are some 
| "magic" methods to support that (for that example __float__)
|
| However, that doesn't seem to be your problem. You just pass the wrong 
| arguments, which makes the jython wrapping punke on you as only certain 
| types can be dealt with.
|
| To me this looks as if you are supposed to do it like this:
|
| self.socket.connect(self.host, self.port)
|
| Note the missing parentheses.

It would have been pretty easy to check that!

   >>> s.connect(host, port)
   Traceback (most recent call last):
     File "<stdin>", line 1, in ?
     File "<string>", line 1, in connect
   TypeError: connect() takes exactly one argument (2 given)
   >>> s.connect((host, port))
   >>> s.close()

connect() used to support that, kind of by accident of how arguments
were parsed.  1.5.4 may have been the last version with that feature.
The documented API has always been connect(address), though.

I don't know anything about the Java problem, though.  Only thing
I could suggest is to try to do as one probably does in Java, and
use a DNS function to resolve the name to an address, and then use
that address.  The way Python uses (hostname, port) to represent
a internet address is convenient but hides this step of the process.
Maybe 'localhost' actually doesn't resolve on the original poster's
computer, and the implementation somehow turns this into a type issue.
If it does resolve, then maybe its IP address will work better here.

	Donn Cave, donn at drizzle.com


From paul at boddie.org.uk  Fri Feb 24 06:30:46 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 24 Feb 2006 03:30:46 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com> <43fbc788@usenet01.boi.hp.com>
	<87u0ar3gba.fsf@wilson.homeunix.com>
	<pan.2006.02.22.11.35.14.90948@REMOVETHIScyber.com.au>
	<87bqwzjys9.fsf@wilson.homeunix.com> <43fe7592@usenet01.boi.hp.com>
	<87zmkh899p.fsf@wilson.homeunix.com>
Message-ID: <1140780646.876661.268930@v46g2000cwv.googlegroups.com>

Torsten Bronger wrote:
>
> Peter Mayne <Peter.Mayne at hp.com> writes:
> > What kind of implications are useful to you?
>
> Speed, ease of programming, necessity to learn/use a secondary
> language, issues with distributing, portability.

Indeed. Given the various convenient arguments about what "interpreted"
means (and how Python is simultaneously the same as and yet quite
different to Lisp), you'd think that the average C/C++/Lisp programmer
would have to be quite familiar with microcode to finish off a fair
number of their projects.

Paul



From ramkumar at aapt.net.au  Mon Feb 27 02:53:32 2006
From: ramkumar at aapt.net.au (Ramkumar Nagabhushanam)
Date: Mon, 27 Feb 2006 17:53:32 +1000
Subject: Callback
Message-ID: <4402AFFC.000003.09928@RAMKUMAR>

Hello All,
 
I am writing an application in C/C++ (VC++ 6.0 compiler) within which I want
to make calls using the python FTP client (ftplib).
 
I want to call (for example) after the necessary iniialization has been
done:
PyObject *t = PyObject_CallMethod (_FTP, "retrlines", ...., "LIST",
c_function);
Where c_function is a callback function (prototype is - static PyObject
*c_function (char * data) ).
I am not able to get this to work. I am not sure 3rd parameter of
PyObject_CallMethod should be and if the way I have used the callback
function is right.
Any help will be most appreciated.
Regards,
Ram
 
 
 


From exarkun at divmod.com  Sun Feb 12 13:49:44 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Sun, 12 Feb 2006 13:49:44 -0500
Subject: Tracking down memory leaks?
In-Reply-To: <1139767982.590519.60050@g47g2000cwa.googlegroups.com>
Message-ID: <20060212184944.20077.511891021.divmod.quotient.980@ohm>

On 12 Feb 2006 10:13:02 -0800, "dmsbox2000-list1 at yahoo.com" <dstark7 at gmail.com> wrote:
>>> I'm not an expert on python internals, and it is possible that they have
>>> a way of checking for cases like this.   I think the deepcopy method
>>> catches this, but I don't *think* basic garbage collection look for this
>>> sort of thing.
>>
>> deepcopy has nothing to do with garbage collection.
>>
>> This is where you use deepcopy:
>>
>> py> a = [2, 4, [0, 1, 2], 8]  # note the nested list
>> py> b = a         # b and a both are bound to the same list
>> py> b is a        # b is the same list as a, not just a copy
>> True
>> py> c = a[:]      # make a shallow copy of a
>> py> c is a        # c is a copy of a, not a itself
>> False
>> py> c[2] is a[2]  # but both a and c include the same nested list
>> True
>>
>> What if you want c to include a copy of the nested list? That's where you
>> use deepcopy:
>>
>> py> d = copy.deepcopy(a)
>> py> d[2] is a[2]
>> False
>
>What I ment is that deepcopy is recursive, and if you have a circular
>reference in your data structure a recursive copy will become infinite.
> I think deepcopy has the ability to detect this situation.  So if it
>could be detected for deepcopy, I don't see why it could not be
>detected for garbage collection purposes.

It's moot, since the garbage collector can collect cycles:

  Make a cycle:

    >>> a = []
    >>> b = []
    >>> a.append(b)
    >>> b.append(a)

  Get rid of all references to all objects participating in it:

    >>> del a, b

  Explicitly invoke the garbage collector in order to observe the number of objects it cleans up:

    >>> gc.collect()
    2

Jean-Paul


From markleeds at verizon.net  Sat Feb 25 01:00:26 2006
From: markleeds at verizon.net (MARK LEEDS)
Date: Fri, 24 Feb 2006 22:00:26 -0800
Subject: mimicing pg 398 of practical python
Message-ID: <002f01c639d0$c6a264b0$2f01a8c0@m8d4477f3de884>

I am trying to duplicate the sunspots graph on page 398 of Practical Python. I don''t
have those reportlab modules so i downloaded them from their website  and tried to put them somewhere
( not clear where i should  put them ) and then i added that place to my sys.path
by doig sys.path.append inside the same program. but, i still got the error that
it doesn't know about thsis module ?

does anyone have really good directions on how to download the reportlab stuff
so that it works. the book, practical python is amazing but this part is a little
unclear. thanks a lot.

or maybe thre is an easier graphics package to use that is already inside python.
i'm a beginner. thanks.


                                                            mark
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From rich.teer at rite-group.com  Tue Feb  7 23:58:06 2006
From: rich.teer at rite-group.com (Rich Teer)
Date: Wed, 08 Feb 2006 04:58:06 GMT
Subject: Xah's Edu Corner: Unix damage: color names
In-Reply-To: <1139356437.987319.59280@g14g2000cwa.googlegroups.com>
References: <1133844932.007824.26780@g43g2000cwa.googlegroups.com>  
	<1134780763.066592.45390@g49g2000cwa.googlegroups.com>  
	<1135405908.381150.133190@o13g2000cwo.googlegroups.com>  
	<1136236586.734775.212440@f14g2000cwb.googlegroups.com>  
	<1137784561.589887.58380@o13g2000cwo.googlegroups.com>
	<1139356437.987319.59280@g14g2000cwa.googlegroups.com>
Message-ID: <Pine.SOL.4.64.0602072056500.432@marrakesh>

On Tue, 7 Feb 2006, Xah Lee wrote:

More of his usual bollocks.

                                  ___________________
                          /|  /|  |                  |
                          ||__||  |      Please do   |
                         /   O O\__         NOT      |
                        /          \     feed the    |
                       /      \     \     trolls     |
                      /   _    \     \ ______________|
                     /    |\____\     \     ||
                    /     | | | |\____/     ||
                   /       \|_|_|/   \    __||
                  /  /  \            |____| ||
                 /   |   | /|        |      --|
                 |   |   |//         |____  --|
          * _    |  |_|_|_|          |     \-/
       *-- _--\ _ \     //           |
         /  _     \\ _ //   |        /
       *  /   \_ /- | -     |       |
         *      ___ c_c_c_C/ \C_c_c_c____________

-- 
Rich Teer, SCNA, SCSA, OpenSolaris CAB member

President,
Rite Online Inc.

Voice: +1 (250) 979-1638
URL: http://www.rite-group.com/rich


From localpricemaps at gmail.com  Fri Feb  3 10:27:56 2006
From: localpricemaps at gmail.com (localpricemaps at gmail.com)
Date: 3 Feb 2006 07:27:56 -0800
Subject: problems writing tuple to log file
Message-ID: <1138980476.469673.254090@g44g2000cwa.googlegroups.com>

i am having a problem writing a tuple to a text file.  my code is
below.

what i end up getting is a text file that looks like this

burger, 7up
burger, 7up
burger, 7up

and this is instead of getting a list that should look like this

burger, 7up
fries ,coke
cake ,milk

note that i have print statements that print out the results of the
scraping and they are fine.  they print out burger, fries, cake and
then 7up, coke, milk

however there is something faulty in my writing of the tuple to the
text file.  perhaps related to the indentation that causes it to write
the same stuff over and over?



    for row in bs('div'):

	data=[]

	for incident in bs('span'):
        	foodlist = []
		b = incident.findPrevious('b')
		for oText in b.fetchText( oRE):
            		#foodlist.append(oText.strip() + "',")
				foodlist += oText.strip() + "','"
		food = ''.join(foodlist)
		print food



	for incident in bs('span2'):
        	drinklist = []
		for oText in incident.fetchText( oRE):
            		drinklist += oText.strip() + "','"
		drink = ''.join(drinklist)
		print drink




        tuple = (food + drink "\n")
        data.append(tuple)
      f = open("data.txt", 'a')
      f.write ( ''.join( tuple ) )



From mrbmahoney at gmail.com  Sat Feb 18 15:01:16 2006
From: mrbmahoney at gmail.com (B Mahoney)
Date: 18 Feb 2006 12:01:16 -0800
Subject: Should we still be learning this?
References: <xuGdnQRiLabDiGrenZ2dnUVZ_tWdnZ2d@is.co.za>
	<FYCdnYtvV8-cvmreRVn-gQ@comcast.com>
Message-ID: <1140289499.392590.29130@g43g2000cwa.googlegroups.com>

I was initally annoyed that "Dive into Python" has the UserDict, but it
was so
easy to discover it was deprecated
http://docs.python.org/lib/module-UserDict.html
(althought the term 'deprecated' is not specifically used), that anyone
on the
ball (the OP seemed to know) would not based their next big project on
UserDict.

I agree that Python has so many good concepts, and improvements with
each new version, that something in a course will be outdated. I can
concur
that knowing Python made it much easier to go back to C++ and Java and
understand the OO.

My tip for an book on Python with only the latest information, nothing
beats the Python Pocket Reference, 3rd edition,  (O'Reilly) which
is updated for  2.4 and seems to clearly label any deprecated features.



From tdelaney at avaya.com  Wed Feb 15 23:26:35 2006
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Thu, 16 Feb 2006 15:26:35 +1100
Subject: Which is faster? (if not b in m) or (if m.count(b) > 0)
Message-ID: <2773CAC687FD5F4689F526998C7E4E5F07434B@au3010avexu1.global.avaya.com>

Two additional things beyond the important lesson to always time things:

1. Be careful with operator precedence. In this case, people got lucky:

    not b in m

has the precedence:

    not (b in m)

2. Python has a "not in" operator:

    b not in m

which is the clearest and fastest way to test for non-membership in a
container.

Tim Delaney


From bearophileHUGS at lycos.com  Sat Feb 11 11:59:53 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 11 Feb 2006 08:59:53 -0800
Subject: Shortest prime number program
In-Reply-To: <kGoHf.11700$915.6920@southeast.rr.com>
References: <1139652226.869102.310180@g14g2000cwa.googlegroups.com>
	<1139673716.241461.84110@g47g2000cwa.googlegroups.com>
	<kGoHf.11700$915.6920@southeast.rr.com>
Message-ID: <1139677193.296154.131130@g43g2000cwa.googlegroups.com>

This is a little shorter :-)

[2]+[x for x in range(2,99)if 2**x%x==2] 

Bye,
bearophile



From sybrenUSE at YOURthirdtower.com.imagination  Tue Feb 28 12:51:17 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Tue, 28 Feb 2006 18:51:17 +0100
Subject: Python and Flash
References: <1139230361.675896.241920@z14g2000cwz.googlegroups.com>
	<1139235297.903689.244030@z14g2000cwz.googlegroups.com>
	<1139407620.948877.5820@g14g2000cwa.googlegroups.com>
	<1141101898.725832.104260@e56g2000cwe.googlegroups.com>
	<1141102008.086764.24550@j33g2000cwa.googlegroups.com>
	<slrne0824e.9s8.sybrenUSE@schuimige.unrealtower.org>
	<1141136533.215656.290800@i39g2000cwa.googlegroups.com>
	<1141148285.499150.325180@j33g2000cwa.googlegroups.com>
Message-ID: <slrne093cl.c47.sybrenUSE@schuimige.unrealtower.org>

SamFeltus enlightened us with:
> By the way Sybren, if you don't mind, what kinda computer and
> browser were you using, trying to figure out which browsers get
> redirected to html and which get the Flash Site.

Mozilla Firefox 1.5, on Ubuntu Linux Breezy.

> If you have Flash plugin, what version was it?

Shockwave Flash 7.0 r25

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From bearophileHUGS at lycos.com  Tue Feb 21 07:42:17 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 21 Feb 2006 04:42:17 -0800
Subject: how to break a for loop?
References: <1140476451.649515.127230@g44g2000cwa.googlegroups.com>
Message-ID: <1140525737.483568.144330@o13g2000cwo.googlegroups.com>

This time it seems that using itertools gives slower results, this is
the test code:

import itertools as it
from operator import __not__

def trim_leading_zeros(seq):
    if not seq:
        return seq
    for pos, el in enumerate(seq):
        if el != 0:
            break
    if seq[pos] == 0:
        del seq[:]
        return seq
    return seq[pos:]

def trim_leading_zeros2(seq):
    seq[:] = it.dropwhile(__not__, seq)
    return seq

data = ([0,0,0,0,0,1,2,3,4],
        [1,2,3,4],
        [0,1],
        [0,0,0],
        [0,0,0,1],
        [])

for l in data:
    print l, trim_leading_zeros(l), trim_leading_zeros2(l)

from time import clock
n = 3 * 10**5

l = [0] * n + [1] * n
t = clock()
trim_leading_zeros(l)
print round(clock()-t, 2), "s"

l = [0] * n + [1] * n
t = clock()
trim_leading_zeros2(l)
print round(clock()-t, 2), "s"

Gives this output on my PC:

[0, 0, 0, 0, 0, 1, 2, 3, 4] [1, 2, 3, 4] [1, 2, 3, 4]
[1, 2, 3, 4] [1, 2, 3, 4] [1, 2, 3, 4]
[0, 1] [1] [1]
[0, 0, 0] [] []
[0, 0, 0, 1] [1] [1]
[] [] []
0.3 s
2.86 s

Bye,
bearophile



From kay.schluehr at gmx.net  Sat Feb 25 16:31:59 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 25 Feb 2006 13:31:59 -0800
Subject: Is Python a Zen language?
In-Reply-To: <1140879469.853398.322850@i40g2000cwc.googlegroups.com>
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
	<1140878147.541074.233540@i40g2000cwc.googlegroups.com>
	<1140879469.853398.322850@i40g2000cwc.googlegroups.com>
Message-ID: <1140903119.580735.108440@e56g2000cwe.googlegroups.com>


John Coleman wrote:
> Ron Stephens wrote:
> > Actually, Python has the distinction of being both a great tool
> > language *and* a great Zen language. That's what makes Python so cool
> > ;-)))
> >
> > Ron Stephens
> > Python411
> > www.awaretek.com/python/index.html
>
> This would explain why the question is so hard to answer. It is a
> slam-dunk that Lisp is Zen and VBA is tool - but python really is a bit
> hard to classify. This is somewhat similar to the way that python seems
> to straddle the gap between imperative and functional languages. It has
> something from each worlds (whether it has the *best* from each world
> is a separate question)
>
> -John Coleman

There is something that worries me about Lisp. If you are interested in
the history of Lisp and some non-technical aspects of its culture I can
recommend the writings of Richard Gabriel, who was one of the leaders
of the CL standardisation commitee and founder of the Lisp company
Lucid in the mid 80s that gone down a few years later. As it turned out
that time Lisp was not capable to survive in what we call today a
"heterogenous environment". It was strongly too self-centered. So I
would actually invert you categories and say that a good tool achieves
to have a non-dual nature instead of a strong I. With Lisp you might be
a god but according to the Zen philosophy a god is a subordinated
character that preserves the illusion of self-identity. A fine thing
about a tool in this context is that you have to define its identity by
a relationship to something that it is not.

I have at times the impression that many people who talk about Zen
philosophy confuse it with some home brewn mixture of platonism with
its transgressive move towards the true reality, a stoic hedonism of
contemplation and the taoistic being-in-doing. Zen on the other side is
more radical: if you erase yourself there is no-one "who" is in the
flow but chances are that you and the computer over there are the same
thing.

Kay



From istvan.albert at gmail.com  Thu Feb  2 13:24:52 2006
From: istvan.albert at gmail.com (Istvan Albert)
Date: 2 Feb 2006 10:24:52 -0800
Subject: HTML parsing bug?
References: <1138632328.306349.241430@g44g2000cwa.googlegroups.com>
	<1138633701.862513.326770@f14g2000cwb.googlegroups.com>
	<ccq0u1dcrjmtlmh6ao3rcpb9sg7l9fgdla@4ax.com>
Message-ID: <1138904692.192644.180870@g44g2000cwa.googlegroups.com>

>> this is a comment in JavaScript, which is itself inside an HTML comment

> Did you read the post? 

misread it rather ...



From aleaxit at yahoo.com  Tue Feb  7 10:51:30 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Tue, 7 Feb 2006 07:51:30 -0800
Subject: Detecting line endings
References: <1139236514.022464.319970@g14g2000cwa.googlegroups.com>
	<1hacujo.1p81efw1ej38ioN%aleaxit@yahoo.com>
	<1139304588.446722.255240@o13g2000cwo.googlegroups.com>
Message-ID: <1hadpni.1ne1raq17jjbyaN%aleaxit@yahoo.com>

Fuzzyman <fuzzyman at gmail.com> wrote:
   ...
> > Open the file with 'rU' mode, and check the file object's newline
> > attribute.
> 
> Do you know if this works for multi-byte encodings ? Do files have

You mean when you open them with the codecs module?

> metadata associated with them showing the line-ending in use ?

Not in the filesystems I'm familiar with (they did use to, in
filesystems used on VMS and other ancient OSs, but that was a very long
time ago).


Alex


From onurb at xiludom.gro  Tue Feb 14 09:13:57 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Tue, 14 Feb 2006 15:13:57 +0100
Subject: Pythonic gui format?
In-Reply-To: <HrKdnTDaI9YCfmzeRVn-pg@comcast.com>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<43f11990$0$667$626a54ce@news.free.fr>
	<a9KdnTPXHOGOr2zenZ2dnUVZ_vidnZ2d@comcast.com>
	<43f19d88$0$4761$636a55ce@news.free.fr>
	<HrKdnTDaI9YCfmzeRVn-pg@comcast.com>
Message-ID: <43f1e5c1$0$4756$636a55ce@news.free.fr>

DH wrote:
> bruno at modulix wrote:
> 
>> DH wrote:
>>
>>> Bruno Desthuilliers wrote:
>>>
>>>>> I am currently seeking for pythonic alternative for XML. 
>>>>
>>>>
>>>> A pretty obvious one is dicts and lists. What about (Q&D):
>>>
>>>
>>> That's like JSON: http://www.json.org/example.html
>>
>>
>> No, it's pure Python. It happens that JSON looks pretty close to Python,
>> but that's another point.
> 
> 
> Python dict and lists ARE JSON.  The only difference that python can't
> handle is multiline comments.

And what about true vs True and false vs False ?-)

No, Python's dicts and lists are not JSON. They are Python's dicts and
lists. JSON stands for JavaScript Object Notation, and AFAIK, Python and
javascript are two different languages (even if they are pretty close on
some points).

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From gjzusenet at gmail.com  Sat Feb 25 06:41:05 2006
From: gjzusenet at gmail.com (gjzusenet at gmail.com)
Date: 25 Feb 2006 03:41:05 -0800
Subject: Multiple threaded download streams?
Message-ID: <1140867665.749334.210370@v46g2000cwv.googlegroups.com>

Hello.
Though Python supports threading, I think it is limited to python code
- as soon as you issue a command that uses an external (C?) module, all
of your python threads hang until this command returns.
Is that true?
I'm using urllib2 to download many files, and I have a double problem:
1. downloading all of them is painfully slow since it's serial - one
has to finish before the next request gets sent.
2. my GUI becomes non responsive during the downloads - major problem!

Is there any way to work around that?
I want to run multiple download streams, in parallel, and while keeping
my program responsive.
Are there alternative modules that I can use for that?

Any ideas?
Thanks a lot!



From fredrik at pythonware.com  Fri Feb 17 05:16:54 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Feb 2006 11:16:54 +0100
Subject: file.read problem
References: <1140158220.388409.87650@g47g2000cwa.googlegroups.com><1140159632.758960.318580@g44g2000cwa.googlegroups.com><mailman.2041.1140166701.27775.python-list@python.org>
	<1140168071.085338.132630@o13g2000cwo.googlegroups.com>
Message-ID: <dt47qp$abb$1@sea.gmane.org>

"wscrsurfdude" wrote:

> >if it's a binary file, open with mode "rb".

> You are right about opening it in the rb mode (flaw in the start post),
> but also when I do this in windows in front of every 0x0A is put a
> 0x0D. I found a explanation why it is working in linux it is below in
> my post.
>
> But what i get of this that in windows in front of every 0x0A is put a
> 0x0D as a line feed. II have to get rid of these.

if you open a file in binary mode ("rb"), you get the data that's in the
file.  no more, no less.  if someone's adding CR to the files, that happens
before you opened them in Python.

have you, perhaps, copied binary files between the systems using FTP
in text mode?  if so, you've damaged the files, and there's no way to fix
them, in general.

</F>





From mlist at fastwebnet.it  Mon Feb  6 19:07:19 2006
From: mlist at fastwebnet.it (billie)
Date: Tue, 7 Feb 2006 01:07:19 +0100
Subject: Best way to capture output of another command-line program in
	Win32?
References: <qu7fu19vuoddfcn2fu3t23mfqg6536t6qn@4ax.com>
	<1139263882.684516.169070@o13g2000cwo.googlegroups.com>
Message-ID: <PwRFf.71991$av6.32919@tornado.fastwebnet.it>

Another way:

>>> import popen2
>>> exec_cmd = popen2.popen4('dir')
>>> output = exec_cmd[0].read()
>>> print output
[...]
04/02/2006  21.44               106 setup.py
06/02/2006  23.25               656 time_synch.py
07/02/2006  00.52            16.885 knockd.log
07/02/2006  00.35             6.376 conf.pyc
[...]





From john_zenger at yahoo.com  Thu Feb 23 22:44:43 2006
From: john_zenger at yahoo.com (John Zenger)
Date: Thu, 23 Feb 2006 22:44:43 -0500
Subject: regular expresson for Unix and Dos Lineendings wanted
In-Reply-To: <jterv157550g4qd4rosc3a2o8l69gcau8v@4ax.com>
References: <jterv157550g4qd4rosc3a2o8l69gcau8v@4ax.com>
Message-ID: <4dSdnbEkBp2zHGPenZ2dnUVZ_t-dnZ2d@comcast.com>

How about r"\s+[\n\r]+|\s+$"  ?

Franz Steinhaeusler wrote:
> Hello, I need a regularexpression, which trims trailing whitespaces.
> 
> While with unix line endings, it works; 
> but not with Window (Dos) CRLF's:
> 
> 
>>>>import re
>>>>retrailingwhitespace = re.compile('(?<=\S)[ \t]+$', re.MULTILINE)
> 
> 
> 1) Windows
> 
>>>>r="erewr    \r\nafjdskl     "
>>>>newtext, n = retrailingwhitespace.subn('', r)
>>>>n
> 
> 1
> 
>>>>newtext
> 
> 'erewr    \r\nafjdskl'
> 
> 2) Unix
> 
>>>>r="erewr    \nafjdskl     "
>>>>newtext, n = retrailingwhitespace.subn('', r)
>>>>n
> 
> 2
> 
>>>>newtext
> 
> 'erewr\nafjdskl'
> 
> 
> Who can help me (regular expression, which works for both cases).
> 
> Thank you in advance!


From bokr at oz.net  Tue Feb  7 13:10:05 2006
From: bokr at oz.net (Bengt Richter)
Date: Tue, 07 Feb 2006 18:10:05 GMT
Subject: * 'struct-like' list *
References: <1139245389.529742.317110@g43g2000cwa.googlegroups.com>
Message-ID: <43e8c362.179938698@news.oz.net>

On 6 Feb 2006 09:03:09 -0800, "Ernesto" <erniedude at gmail.com> wrote:

>I'm still fairly new to python, so I need some guidance here...
>
>I have a text file with lots of data.  I only need some of the data.  I
>want to put the useful data into an [array of] struct-like
>mechanism(s).  The text file looks something like this:
>
>[BUNCH OF NOT-USEFUL DATA....]
>
>Name:  David
>Age: 108   Birthday: 061095   SocialSecurity: 476892771999
>
>[MORE USELESS DATA....]
>
>Name........

Does the useful data always come in fixed-format pairs of lines as in your example?
If so, you could just iterate through the lines of your text file as in example at end [1]

>
>I would like to have an array of "structs."  Each struct has
>
>struct Person{
>    string Name;
>    int Age;
>    int Birhtday;
>    int SS;
>}
You don't normally want to do real structs in python. You probably want to define
a class to contain the data, e.g., class Person in example at end [1]

>
>I want to go through the file, filling up my list of structs.
>
>My problems are:
>
>1.  How to search for the keywords "Name:", "Age:", etc. in the file...
>2.  How to implement some organized "list of lists" for the data
>structure.
>
It may be very easy, if the format is fixed and space-separated and line-paired
as in your example data, but you will have to tell us more if not.

[1] exmaple:

----< ernesto.py >---------------------------------------------------------
class Person(object):
    def __init__(self, name):
        self.name = name
    def __repr__(self): return 'Person(%r)'%self.name

def extract_info(lineseq):
    lineiter = iter(lineseq) # normalize access to lines
    personlist = []
    for line in lineiter:
        substrings = line.split()
        if substrings and isinstance(substrings, list) and substrings[0] == 'Name:':
            try:
                name = ' '.join(substrings[1:]) # allow for names with spaces
                line = lineiter.next()
                age_hdr, age, bd_hdr, bd, ss_hdr, ss = line.split()
                assert age_hdr=='Age:' and bd_hdr=='Birthday:' and ss_hdr=='SocialSecurity:', \
                        'Bad second line after "Name: %s" line:\n    %r'%(name, line)
                person = Person(name)
                person.age = int(age); person.bd = int(bd); person.ss=int(ss)
                personlist.append(person)             
            except Exception,e:
                print '%s: %s'%(e.__class__.__name__, e)
    return personlist

def test():
    lines = """\
[BUNCH OF NOT-USEFUL DATA....]

Name:  David
Age: 108   Birthday: 061095   SocialSecurity: 476892771999

[MORE USELESS DATA....]

Name: Ernesto
Age: 25 Birthday: 040181  SocialSecurity: 123456789

Name: Ernesto
Age: 44 Brithdy: 040106 SocialSecurity: 123456789

Name........
"""
    persondata = extract_info(lines.splitlines())
    print persondata
    ssdict = {}
    for person in persondata:
        if person.ss in ssdict:
            print 'Rejecting %r with duplicate ss %s'%(person, person.ss)
        else:
            ssdict[person.ss] = person
    print 'ssdict keys: %s'%ssdict.keys()
    for ss, pers in sorted(ssdict.items(), key=lambda item:item[1].name): #sorted by name
        print 'Name: %s Age: %s SS: %s' % (pers.name, pers.age, pers.ss)

if __name__ == '__main__': test()
---------------------------------------------------------------------------

this produces output:

[10:07] C:\pywk\clp>py24 ernesto.py
AssertionError: Bad second line after "Name: Ernesto" line:
    'Age: 44 Brithdy: 040106 SocialSecurity: 123456789'
[Person('David'), Person('Ernesto')]
ssdict keys: [123456789, 476892771999L]
Name: David Age: 108 SS: 476892771999
Name: Ernesto Age: 25 SS: 123456789

if you want to try this on a file, (we'll use the source itself here
since it includes valid example data lines), do something like:

 >>> import ernesto
 >>> info = ernesto.extract_info(open('ernesto.py'))
 AssertionError: Bad second line after "Name: Ernesto" line:
     'Age: 44 Brithdy: 040106 SocialSecurity: 123456789\n'
 >>> info
 [Person('David'), Person('Ernesto')]

tweak to taste ;-)

Regards,
Bengt Richter


From daniel at dittmar.net  Wed Feb  1 16:16:45 2006
From: daniel at dittmar.net (Daniel Dittmar)
Date: Wed, 01 Feb 2006 22:16:45 +0100
Subject: Sharing database connection from C to Python
In-Reply-To: <1138645231.806434.227620@z14g2000cwz.googlegroups.com>
References: <1138645231.806434.227620@z14g2000cwz.googlegroups.com>
Message-ID: <43E1253D.2050908@dittmar.net>

dgiagio at gmail.com wrote:
> I'm developing an application using the C language and Python for it's
> plugins. The C program connects to a MySQL database and keeps that
> connection active. Is it possible to 'share' this connection with the
> Python plugins? If so, is there a "standard" way to do that?

There is no simple way as MySQL connections in Python are Python 
extension objects. You'll probably have to use a custom MySQL driver.

Either create the session in C and add a constructor to the python to 
create a MySQL connection object from that handle or pointer

Or add a method to the Python MySQL object to get the handle and 
pointer. Create all database connections in Python (precise: using the 
Python API from C), get the handle and pointer to use it from C, pass 
the original session to plugins.

Daniel


From skip at pobox.com  Thu Feb  9 20:03:33 2006
From: skip at pobox.com (skip at pobox.com)
Date: Thu, 9 Feb 2006 19:03:33 -0600
Subject: spell check code
In-Reply-To: <87ek2ckr4p.fsf@workhorse.earlhome>
References: <dsdo82$92q$1@solaris.cc.vt.edu>
	<87ek2ckr4p.fsf@workhorse.earlhome>
Message-ID: <17387.58981.778023.859332@montanaro.dyndns.org>

    >> What is the most common way to spell check comments in code? Are
    >> there any idle plugins or modules that do this?

    Jason> In Emacs you can use "flyspell-prog-mode" to check strings and
    Jason> comments automagically.

They also both have spell-check menu items that allow you to check just
comments and strings.

Skip


From heikki at osafoundation.org  Fri Feb 24 15:39:23 2006
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Fri, 24 Feb 2006 12:39:23 -0800
Subject: Using ElementTree to tidy up an XML string to my liking
In-Reply-To: <1140781410.982716.316410@p10g2000cwp.googlegroups.com>
References: <1140716245.381730.285310@j33g2000cwa.googlegroups.com>
	<1140767274.159129.268640@i39g2000cwa.googlegroups.com>
	<1140781410.982716.316410@p10g2000cwp.googlegroups.com>
Message-ID: <68CdnXuCNqJg82LenZ2dnUVZ_vydnZ2d@comcast.com>

peterbe at gmail.com wrote:
> Yes I am but, I'm using a DOM Serializer in Firefox which for some
> reason turns myCamelNames into MYCAMELNAMES for the nodenames. I'll
> therefore need to control the case-spelling of these things as I'm
> formatting the XML string.

I am almost certain there is something wrong you are doing in Mozilla if
that is happening. My first guess is that you are really doing HTML even
thought you think you are doing XML, and therefore Mozilla converts your
stuff to uppercase. Without seeing the source it is hard to say. I would
advice you write to the Mozilla forums for advice on that.

-- 
  Heikki Toivonen


From fuzzyman at gmail.com  Tue Feb  7 04:29:48 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 7 Feb 2006 01:29:48 -0800
Subject: Detecting line endings
In-Reply-To: <1hacujo.1p81efw1ej38ioN%aleaxit@yahoo.com>
References: <1139236514.022464.319970@g14g2000cwa.googlegroups.com>
	<1hacujo.1p81efw1ej38ioN%aleaxit@yahoo.com>
Message-ID: <1139304588.446722.255240@o13g2000cwo.googlegroups.com>


Alex Martelli wrote:
> Fuzzyman <fuzzyman at gmail.com> wrote:
>
> > Hello all,
> >
> > I'm trying to detect line endings used in text files. I *might* be
> > decoding the files into unicode first (which may be encoded using
>
> Open the file with 'rU' mode, and check the file object's newline
> attribute.
>

Do you know if this works for multi-byte encodings ? Do files have
metadata associated with them showing the line-ending in use ?

I suppose I could test this...

All the best,


Fuzzy

> > My worry is that if '\n' *doesn't* signify a line break on the Mac,
>
> It does, since a few years, since MacOSX is version of Unix to all
> practical intents and purposes.
> 
> 
> Alex



From klachemin at comcast.net  Wed Feb 15 17:58:32 2006
From: klachemin at comcast.net (Kamilche)
Date: 15 Feb 2006 14:58:32 -0800
Subject: how to get function names from the file
In-Reply-To: <1140041022.500870.141430@g14g2000cwa.googlegroups.com>
References: <1140041022.500870.141430@g14g2000cwa.googlegroups.com>
Message-ID: <1140044312.139680.286170@g43g2000cwa.googlegroups.com>

The following will return a dictionary containing the names and
functions of all the public functions in the current module. If a
function starts with an underscore _, it is considered private and not
listed.

def _ListFunctions():
    import sys
    import types
    d = {}
    module = sys.modules[__name__]
    for key, value in module.__dict__.items():
        if type(value) is types.FunctionType:
            fnname = value.__name__
            if fnname[0] != '_':
                d[value.__name__] = value
    return d



From jason at tishler.net  Mon Feb 20 16:44:14 2006
From: jason at tishler.net (Jason Tishler)
Date: Mon, 20 Feb 2006 16:44:14 -0500
Subject: Building python 2.4.2 on Cygwin
In-Reply-To: <1140467074.739405.163440@g44g2000cwa.googlegroups.com>
References: <1140467074.739405.163440@g44g2000cwa.googlegroups.com>
Message-ID: <20060220214414.GA1924@tishler.net>

Steve,

On Mon, Feb 20, 2006 at 12:24:34PM -0800, mrstephengross wrote:
> Ok, I'm working on building python 2.4.2 on cygwin. I *think* it's
> version 3.0 or 3.1 (is there a quick way to find out what version of
> cygwin is running within a shell?)

Use "uname -r".  What version are you running?

Jason

-- 
PGP/GPG Key: http://www.tishler.net/jason/pubkey.asc or key servers
Fingerprint: 7A73 1405 7F2B E669 C19D  8784 1AFD E4CC ECF4 8EF6


From spamgoeshere4 at yahoo.com  Mon Feb 20 10:38:29 2006
From: spamgoeshere4 at yahoo.com (rickman)
Date: 20 Feb 2006 07:38:29 -0800
Subject: Is Forth for real?
In-Reply-To: <1v44c3-geo.ln1@lairds.us>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
	<1139754010.067582.214830@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>
	<1v44c3-geo.ln1@lairds.us>
Message-ID: <1140449909.473421.224250@g14g2000cwa.googlegroups.com>

Cameron Laird wrote:
> In article <pan.2006.02.12.15.11.04.739314 at REMOVETHIScyber.com.au>,
> Steven D'Aprano  <steve at REMOVETHIScyber.com.au> wrote:
> 			.
> 			.
> 			.
> >on the web for each language. By comparison, even Forth gives 13 million
> >plus hits, and who uses Forth?
> 			.
> 			.
> 			.
> The programmers of, among other things, the FedEx bar-code reader,
> the Sun boot loader, and parts of the Space Shuttle.

The original post seems to be missing, but my answer to the title
question is, No, Forth is not real.



From tiit at sympatico.ca  Fri Feb 24 16:25:49 2006
From: tiit at sympatico.ca (Etienne Desautels)
Date: Fri, 24 Feb 2006 16:25:49 -0500
Subject: Reading from socket file handle took too long
Message-ID: <BAYC1-PASMTP06E45108E70693BBB7ADA2B1F30@CEZ.ICE>


Hi,

I'm working on project where I need to grab video from an Axis IP  
camera. This camera send a stream of a multipart message on HTTP. I  
write this code (at the bottom of the message) to read and uncompress  
each jpeg images. I call nextFrame() 24 times per seconds (or every  
0,0416 sec.) to read the next image that arrived.

Everything works well but one thing. My problem is that running  
nextFrame() took, most of the time, more then 0,0414 sec. so my video  
is lagging. I monitor every call and I found that the culprit is when I  
read from the socket file handle. It's the only bottleneck in my code.  
I try different approaches to the problem but I always hit the same  
problem.

I don't think it's normal that read() take more then 0,04 sec to read  
1000 bytes from memory (the socket file handle). How can I avoid this  
problem ?

I'm on Linux 2.6 (last Ubuntu) with python 2.4 on P4 2.3.

Thanks

Etienne


CODE
------------------------------------------------------------------------ 
----------------------------

class Axis:
	url = ""
	user = "user"
	password = "password"
	header = {}
	header["Authorization"] = "Basic " + b64encode(user + ":" + password)
	http = urllib2.HTTPHandler()
	state = 0
	limit = 1000
	imageData = None
	sizeX = 352
	sizeY = 240
	fps = 24
	compression = 25
	
	def startGrab(self):
		try:
			url = self.url + "/axis-cgi/mjpg/video.cgi?resolution=" +  
str(self.sizeX) \
			+ "x" + str(self.sizeY) + "&compression=" \
			+ str(self.compression) + "&req_fps=" + str(self.fps)
			req = urllib2.Request(url, None, self.header)
			self.fh = self.http.http_open(req)
			self.buffer = ""
			self.state = 1
		except:
			self.state = 0
	
	def stopGrab(self):
		self.fh.close()
		self.state = 0
	
	def nextFrame(self):
		if self.state:
			try:
				temp = self.fh.read(self.limit)	# <-- TAKE A LOT OF TIME
				self.buffer += temp
				boundary = self.buffer.find("\r\nContent-Type: image/jpeg\r\n") + 30
				if boundary >= 30:
					end = self.buffer.find("\r\n\r\n--myboundary", boundary) + 2
					if end >= 2:
						image = Image.open(StringIO(self.buffer[boundary:end]))
						self.imageData = image.tostring("raw",image.mode,0,-1)
						self.buffer = self.buffer[end:]
									
			except:
				pass



From fuzzyman at gmail.com  Tue Feb 21 05:55:04 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 21 Feb 2006 02:55:04 -0800
Subject: Newbie question: Multiple installations of Python on Windows
	machines
In-Reply-To: <mailman.2185.1140472875.27775.python-list@python.org>
References: <mailman.2185.1140472875.27775.python-list@python.org>
Message-ID: <1140519304.913540.296600@g14g2000cwa.googlegroups.com>


Don Taylor wrote:
> I have Python 2.4.2 installed on a Windows XP machine.
>
> There is an application that I want to use that refuses to install
> unless I have Python 2.3.x installed.  (The only way that I can install
> this is to use it's .exe installer)
>
> Can I install two versions of Python on Windows, and if so is there
> something I should do to make sure that the right version is used at the
> right time?  (2.3.x with this one package, and 2.4.2 with everything else).
>

A lot of 'exe' installers are special types of zip archvies. You might
be able to open it using winzip or winrar and do a manual install.

Another alternative is to use the free VMWare player to create a fresh
windows install that will run in a window. You can then install Python
2.3 and your application and extract the files you need to see if you
can make it work under Python 2.4.

If the application contains compiled extensions then they won't be
portable from Python 2.3 to Python 2.4 - however the application will
almost certainly run with Movable Python 2.3 (which won't interfere at
all with your Python 2.4 install).

   http://www.voidspace.org.uk/python/movpy/

You'll still have to get at the application files though. I have a
VMWare install with Python 2.3 on it, so I may be able to help.

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml

> Thanks,
> 
> Don.



From deets at nospam.web.de  Fri Feb 17 11:17:25 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 17 Feb 2006 17:17:25 +0100
Subject: Print a PDF transparently
References: <1140184955.674138.275010@o13g2000cwo.googlegroups.com>
	<11vbpu58sll1b4f@corp.supernews.com>
	<1140190758.951694.231890@f14g2000cwb.googlegroups.com>
Message-ID: <45mbasF7eburU1@uni-berlin.de>

> Based on all this, I have been investigating about postscript files. I
> realize that printers do handle this language, so I think if I have a
> .ps file and send it directly to the printer, it should do the job,
> right? (this is certainly a question) If the answer is True, no matter
> in what platform I am, if I send the same .ps to the printer, it should
> print the same result.

No. There are PostScript-Printers out there - but your off-the-shelf InkJet
isn't, and that's the reason why there usually has to be some sort of
driver in-between. Which is either GS or, in case of PDF, the acrobat-* or
any other PDF-printer-emulator. 

maybe you can go down the rocky road of automation here, remote-controlling
acrobat reader. But I doubt that it wouldn't at least flash up with its
window for as long as the printing lasts.

Diez


From grahn+nntp at snipabacken.dyndns.org  Mon Feb  6 17:34:07 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 6 Feb 2006 22:34:07 GMT
Subject: triple quoted strings as comments
References: <1138667355.631379.249770@o13g2000cwo.googlegroups.com>
	<drppbn$3rg$1@wake.carmen.se>
	<roy-42D40A.08175201022006@reader2.panix.com>
	<hU2Ef.227454$7f1.7126132@phobos.telenet-ops.be>
	<slrnducg9o.2t1.grahn+nntp@frailea.sa.invalid>
	<slrnduehn1.982.volker_grabsch@durin.mathematik.hu-berlin.de>
Message-ID: <slrndufjm9.2t1.grahn+nntp@frailea.sa.invalid>

On 6 Feb 2006 12:53:53 GMT, Volker Grabsch <volker_grabsch at v.notjusthosting.com> wrote:
> Jorgen Grahn wrote:
>>>> [...] developer had 
>>>> commented out about 50 lines of C++ code by just putting a /* at the top 
>>>> and a */ at the bottom.
> [...]
>> ("#if 0" in C and C++ are better choices, but only marginally. Best is to
>> remove the code unless you are sure it's needed again soon. Works in all
>> languages.)
>
> However, I'd only advise to do this if you are using a revision control.

But surely, everybody's using revision control these days?
(Feel free to smile at my naivety now ;-)

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From anno4000 at lublin.zrz.tu-berlin.de  Tue Feb 14 04:48:18 2006
From: anno4000 at lublin.zrz.tu-berlin.de (Anno Siegel)
Date: 14 Feb 2006 09:48:18 GMT
Subject: Xah's Edu Corner: accountability & lying thru the teeth
References: <1133844932.007824.26780@g43g2000cwa.googlegroups.com>
	<1136236586.734775.212440@f14g2000cwb.googlegroups.com>
	<1137784561.589887.58380@o13g2000cwo.googlegroups.com>
	<1139909629.798938.284160@g47g2000cwa.googlegroups.com>
Message-ID: <dss912$luv$1@mamenchi.zrz.TU-Berlin.DE>

Xah Lee <xah at xahlee.org> wrote in comp.lang.perl.misc:

> ...a mechanism, so that any fuckhead tech geekers with their
> loud cries will hurt badly when they open their mouths in public...

Yeah, good idea!

Anno
-- 
If you want to post a followup via groups.google.com, don't use
the broken "Reply" link at the bottom of the article.  Click on 
"show options" at the top of the article, then click on the 
"Reply" at the bottom of the article headers.


From rtilley at vt.edu  Mon Feb 13 14:03:32 2006
From: rtilley at vt.edu (rtilley)
Date: Mon, 13 Feb 2006 19:03:32 +0000
Subject: invert the order of a string
In-Reply-To: <6272v111vee95606gd7fucjdqmec8uhc7e@4ax.com>
References: <dsr600$9sj$1@solaris.cc.vt.edu>
	<6272v111vee95606gd7fucjdqmec8uhc7e@4ax.com>
Message-ID: <dsr6n3$amh$1@solaris.cc.vt.edu>

Dave Hansen wrote:
> How about 
> 
> s = "some random string"
> print s
> s = s[::-1]
> print s

That looks like Perl, but it works. Makes me wonder with the string 
module doesn't have a reverse or invert function?



From jawahh at gmail.com  Wed Feb  8 22:20:13 2006
From: jawahh at gmail.com (jawahh at gmail.com)
Date: 8 Feb 2006 19:20:13 -0800
Subject: removing characters before writing to file
In-Reply-To: <1139452501.421306.44080@f14g2000cwb.googlegroups.com>
References: <1139452501.421306.44080@f14g2000cwb.googlegroups.com>
Message-ID: <1139455213.486623.104660@g43g2000cwa.googlegroups.com>

', '.join(map(str,output))



From ptmcg at austin.rr._bogus_.com  Tue Feb  7 14:49:46 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Tue, 07 Feb 2006 19:49:46 GMT
Subject: python-ldap
References: <1139330793.864675.302090@f14g2000cwb.googlegroups.com>
	<mailman.1559.1139333846.27775.python-list@python.org>
Message-ID: <uR6Gf.25164$jO.23328@tornado.texas.rr.com>

"Steve Holden" <steve at holdenweb.com> wrote in message
news:mailman.1559.1139333846.27775.python-list at python.org...
> btaranto at gmail.com wrote:
> > y0!
> > where can i get module of python-ldap to work with eclipse ide on
> > windows?
> >
> > tks!
> >
> gOOgl3, man
>
> PS: We tend to speak English here :-)
> -- 
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC                     www.holdenweb.com
> PyCon TX 2006                  www.python.org/pycon/
>

How non-l33t of us!

-- Paul




From felipe.lessa at gmail.com  Sun Feb 26 04:45:02 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sun, 26 Feb 2006 06:45:02 -0300
Subject: Optimize flag question
In-Reply-To: <1140919002.167092.53060@v46g2000cwv.googlegroups.com>
References: <400BDC416E2A0042AA35DF3919BB8A5115E14B@mail.mtl.proksim.com>
	<mailman.2441.1140904042.27775.python-list@python.org>
	<1140919002.167092.53060@v46g2000cwv.googlegroups.com>
Message-ID: <1140947102.3967.2.camel@kenshin>

Em S?b, 2006-02-25 ?s 17:56 -0800, bonono at gmail.com escreveu:
> Steve Holden wrote:
> > > Some other functions rely on the AssertionError exception to indicate to
> > > the user that something went wrong instead of using a user defined
> > > exception.
> > >
> >
> > The real problem here is that you appear to be using AssertionError in
> > an inappropriate way. If some caller passes an incorrect argument to
> > your function, raise a ValueError. If you are passed the wrong type of
> > data, raise a TypeError. And so on. Or, as you imply you thought about,
> > raise a user-defined error.
> >
> > Generally speaking you should reserve assert for circumstances where you
> > expect some invariant condition to be true. Otherwise use an "if"
> > statement and raise some other exception if the condition is True.
> >
> What would be the occasion that AssertionError be the right exception
> to raise then ?

IMHO, assertions should be used in places where things are obvious. For
example, you can check if a object is of a given type to avoid using it
on a bad context. *But*, those checks are just to help you while coding,
not at runtime. If you want those checks at runtime, you should be using
if's.

Using other words, assertions should be used only when you know a priori
that the assertion should *never* fail in a production system.

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From martin at v.loewis.de  Sun Feb 12 05:01:54 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 12 Feb 2006 11:01:54 +0100
Subject: PEP 353: Using ssize_t as the index type
Message-ID: <43ef0792$0$11891$9b622d9e@news.freenet.de>

I've been working on PEP 353 for some time now.
Please comment, in particular if you are using 64-bit
systems.

Regards,
Martin

PEP: 353
Title: Using ssize_t as the index type
Version: $Revision: 42333 $
Last-Modified: $Date: 2006-02-12 10:36:52 +0100 (So, 12 Feb 2006) $
Author: Martin v. L?wis <martin at v.loewis.de>
Status: Draft
Type: Standards Track
Content-Type: text/x-rst
Created: 18-Dec-2005
Post-History:


Abstract
========

In Python 2.4, indices of sequences are restricted to the C type
int. On 64-bit machines, sequences therefore cannot use the full
address space, and are restricted to 2**31 elements. This PEP proposes
to change this, introducing a platform-specific index type
Py_ssize_t. An implementation of the proposed change is in
http://svn.python.org/projects/python/branches/ssize_t.


Rationale
=========

64-bit machines are becoming more popular, and the size of main memory
increases beyond 4GiB. On such machines, Python currently is limited,
in that sequences (strings, unicode objects, tuples, lists,
array.arrays, ...)  cannot contain more than 2GiElements.

Today, very few machines have memory to represent larger lists: as
each pointer is 8B (in a 64-bit machine), one needs 16GiB to just hold
the pointers of such a list; with data in the list, the memory
consumption grows even more.  However, there are three container types
for which users request improvements today:

* strings (currently restricted to 2GiB)
* mmap objects (likewise; plus the system typically
  won't keep the whole object in memory concurrently)
* Numarray objects (from Numerical Python)

As the proposed change will cause incompatibilities on 64-bit
machines, it should be carried out while such machines are not in wide
use (IOW, as early as possible).


Specification
=============

A new type Py_ssize_t is introduced, which has the same size as the
compiler's size_t type, but is signed. It will be a typedef for
ssize_t where available.

The internal representation of the length fields of all container
types is changed from int to ssize_t, for all types included in the
standard distribution.  In particular, PyObject_VAR_HEAD is changed to
use Py_ssize_t, affecting all extension modules that use that macro.

All occurrences of index and length parameters and results are changed
to use Py_ssize_t, including the sequence slots in type objects, and
the buffer interface.

New conversion functions PyInt_FromSsize_t and PyInt_AsSsize_t, are
introduced. PyInt_FromSsize_t will transparently return a long int
object if the value exceeds the LONG_MAX; PyInt_AsSsize_t will
transparently process long int objects.

New function pointer typedefs ssizeargfunc, ssizessizeargfunc,
ssizeobjargproc, and ssizessizeobjargproc are introduced. The
buffer interface function types are now called readbufferproc,
writebufferproc, segcountproc, and charbufferproc.

A new conversion code 'n' is introduced for PyArg_ParseTuple
and Py_BuildValue, which operates on Py_ssize_t.

The conversion codes 's#' and 't#' will output Py_ssize_t
if the macro PY_SSIZE_T_CLEAN is defined before Python.h
is included, and continue to output int if that macro
isn't defined.

At places where a conversion from size_t/Py_ssize_t to
int is necessary, the strategy for conversion is chosen
on a case-by-case basis (see next section).

To prevent loading extension modules that assume a 32-bit
size type into an interpreter that has a 64-bit size type,
Py_InitModule4 is renamed to Py_InitModule4_64.


Conversion guidelines
=====================

Module authors have the choice whether they support this PEP in their
code or not; if they support it, they have the choice of different
levels of compatibility.

If a module is not converted to support this PEP, it will continue to
work unmodified on a 32-bit system.  On a 64-bit system, compile-time
errors and warnings might be issued, and the module might crash the
interpreter if the warnings are ignored.

Conversion of a module can either attempt to continue using int
indices, or use Py_ssize_t indices throughout.

If the module should continue to use int indices, care must be taken
when calling functions that return Py_ssize_t or size_t, in
particular, for functions that return the length of an object (this
includes the strlen function and the sizeof operator). A good compiler
will warn when a Py_ssize_t/size_t value is truncated into an int.
In these cases, three strategies are available:

*  statically determine that the size can never exceed an int
   (e.g. when taking the sizeof a struct, or the strlen of
   a file pathname). In this case, write::

     some_int = Py_SAFE_DOWNCAST(some_value, Py_ssize_t, int);

   This will add an assertion in debug mode that the value
   really fits into an int, and just add a cast otherwise.

*  statically determine that the value shouldn't overflow an
   int unless there is a bug in the C code somewhere. Test
   whether the value is smaller than INT_MAX, and raise an
   InternalError if it isn't.
*  otherwise, check whether the value fits an int, and raise
   a ValueError if it doesn't.

The same care must be taking for tp_as_sequence slots, in
addition, the signatures of these slots change, and the
slots must be explicitly recast (e.g. from intargfunc
to ssizeargfunc). Compatibility with previous Python
versions can be achieved with the test::

 #if PY_VERSION_HEX < 0x02050000
 typedef int Py_ssize_t;
 #endif

and then using Py_ssize_t in the rest of the code. For
the tp_as_sequence slots, additional typedefs might
be necessary; alternatively, by replacing::

 PyObject* foo_item(struct MyType* obj, int index)
 {
   ...
 }

with::

 PyObject* foo_item(PyObject* _obj, Py_ssize_t index)
 {
    struct MyType* obj = (struct MyType*)_obj;
    ...
 }

it becomes possible to drop the cast entirely; the type
of foo_item should then match the sq_item slot in all
Python versions.

If the module should be extended to use Py_ssize_t indices, all usages
of the type int should be reviewed, to see whether it should be
changed to Py_ssize_t. The compiler will help in finding the spots,
but a manual review is still necessary.

Particular care must be taken for PyArg_ParseTuple calls:
they need all be checked for s# and t# converters, and
PY_SIZE_T_CLEAN must be defined before including Python.h
if the calls have been updated accordingly.


Discussion
==========

Why not size_t
--------------

An initial attempt to implement this feature tried to use
size_t. It quickly turned out that this cannot work: Python
uses negative indices in many places (to indicate counting
from the end). Even in places where size_t would be usable,
to many reformulations of code where necessary, e.g. in
loops like::

  for(index = length-1; index >= 0; index--)

This loop will never terminate if index is changed from
int to size_t.

Why not Py_intptr_t
-------------------

Conceptually, Py_intptr_t and Py_ssize_t are different things:
Py_intptr_t needs to be the same size as void*, and Py_ssize_t
the same size as size_t. These could differ, e.g. on machines
where pointers have segment and offset. On current flat-address
space machines, there is no difference, so for all practical
purposes, Py_intptr_t would have worked as well.

Doesn't this break much code?
-----------------------------

With the changes proposed, code breakage is fairly
minimal. On a 32-bit system, no code will break, as
Py_ssize_t is just a typedef for int.

On a 64-bit system, the compiler will warn in many
places. If these warnings are ignored, the code will
continue to work as long as the container sizes don't
exceeed 2**31, i.e. it will work nearly as good as
it does currently. There are two exceptions to this
statement: if the extension module implements the
sequence protocol, it must be updated, or the calling
conventions will be wrong. The other exception is
the places where Py_ssize_t is output through a
pointer (rather than a return value); this applies
most notably to codecs and slice objects.

If the conversion of the code is made, the same code
can continue to work on earlier Python releases.

Doesn't this consume too much memory?
-------------------------------------

One might think that using Py_ssize_t in all tuples,
strings, lists, etc. is a waste of space. This is
not true, though: on a 32-bit machine, there is no
change. On a 64-bit machine, the size of many
containers doesn't change, e.g.

* in lists and tuples, a pointer immediately follows
  the ob_size member. This means that the compiler
  currently inserts a 4 padding bytes; with the
  change, these padding bytes become part of the size.
* in strings, the ob_shash field follows ob_size.
  This field is of type long, which is a 64-bit
  type on most 64-bit systems (except Win64), so
  the compiler inserts padding before it as well.

Open Issues
===========

* Marc-Andre Lemburg commented that complete backwards
  compatibility with existing source code should be
  preserved. In particular, functions that have
  Py_ssize_t* output arguments should continue to run
  correctly even if the callers pass int*.

  It is not clear what strategy could be used to implement
  that requirement.


Copyright
=========

This document has been placed in the public domain.


From sudharsh at gmail.com  Mon Feb 27 09:03:07 2006
From: sudharsh at gmail.com (sudharsh at gmail.com)
Date: 27 Feb 2006 06:03:07 -0800
Subject: Python Indentation Problems
In-Reply-To: <1141021286.047172.278030@z34g2000cwc.googlegroups.com>
References: <1141021286.047172.278030@z34g2000cwc.googlegroups.com>
Message-ID: <1141048987.045892.93540@p10g2000cwp.googlegroups.com>

As far as i know, gedit is the weak link, this is because of the way it
handles its whitespaces, had that trouble myself though not this
*severe*



From reply.in.the.newsgroup at my.address.is.invalid  Thu Feb 16 16:10:39 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Thu, 16 Feb 2006 22:10:39 +0100
Subject: embedding python in HTML
References: <GD5Jf.1637$No6.38292@news.tufts.edu>
Message-ID: <t6q9v1p2qcr0ntsau8i6q5glk89pfb4epq@4ax.com>

John Salerno:
[Python alternative for PHP]
>So to do this with Python, do I simply integrate it into the HTML as 
>above, with no extra steps? 

You'd need something like the PHP engine, that understands Python rather
than PHP.

I've used Cheetah:
http://www.cheetahtemplate.org/

Our BDFL seems to prefer Django:
http://www.artima.com/weblogs/viewpost.jsp?thread=146606

There's also PSP:
http://www.ciobriefings.com/psp/

And many more:
http://wiki.python.org/moin/WebProgramming

-- 
Ren? Pijlman


From steve at REMOVEMEcyber.com.au  Mon Feb 13 00:21:13 2006
From: steve at REMOVEMEcyber.com.au (Steven D'Aprano)
Date: Mon, 13 Feb 2006 16:21:13 +1100
Subject: Is python very slow compared to C
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
	<1139754010.067582.214830@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>
	<mailman.1785.1139762698.27775.python-list@python.org>
	<pan.2006.02.12.17.18.50.356928@REMOVETHIScyber.com.au>
	<1139793721.739325.235780@z14g2000cwz.googlegroups.com>
Message-ID: <43F01749.2000601@REMOVEMEcyber.com.au>

bonono at gmail.com wrote:

> I can speak the same about Python if I view it from a prototype based
> perspective, where one get them for free in Lua but need to implement
> them in Python.

Sure. And if you need prototypes, then all else being 
equal that would be a disadvantage of Python compared 
to Lua.

On the other hand, I'd suggest that far more 
programmers are familiar with classes than prototypes, 
regardless of any objective advantages or disadvantages 
of one over the other. Perhaps that's one of the 
reasons why Lua is lacking the market penetration of 
Python: programmers may look at it and say "No classes? 
Prototyping? WTF is that? I don't have time to learn 
something so different, better stick to languages which 
have a smaller learning curve."



-- 
Steven.



From paul at boddie.org.uk  Sat Feb 11 14:44:29 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 11 Feb 2006 11:44:29 -0800
Subject: Determining an operating system's default browser
References: <mailman.1690.1139528346.27775.python-list@python.org>
	<43EBD5E1.1040501@websafe.com>
	<mailman.1692.1139530731.27775.python-list@python.org>
	<1139572261.172035.194190@g14g2000cwa.googlegroups.com>
	<slrndusd7l.2t1.grahn+nntp@frailea.sa.invalid>
Message-ID: <1139687069.810143.117040@g43g2000cwa.googlegroups.com>

Jorgen Grahn wrote:
>

[desktop module]

> Note that those do not, of course, work on all Unices.

Correct: they work only for the stated desktop environments.

> On my machines, there is One Correct Way of doing these things, and that's
> to look in the MIME support/configuration files (~/.mailcap, and so on),
> first for the user, then system-wide. Something there might tell you what
> program should handle text/html content.

Indeed. Thanks for reminding me about mailcap/metamail - I used them in
a project about ten years ago, and I suppose not having any
opportunities to use them in the intervening period probably pushed
them to the back of my mind.

> This mechanism is widespread under Unix, I think ... but I don't know if
> there is a general interface to it, or a Python interface.

Here's an example:

import mailcap
command, entry = mailcap.findmatch(mailcap.getcaps(), "text/html")

Here's another more comprehensive set of examples:

http://effbot.org/librarybook/mailcap.htm

Sadly, when considering my KDE desktop's default browser, inquiring the
application for HTML files yields Mozilla Firefox from my mailcap file.
What I've discovered is that the issue of an URL-opening application is
often quite separate from an appropriate application to open a file of
a given type. Perhaps I should call desktop.open something like
desktop.urlopen instead, since that name arguably describes the purpose
of the function more accurately.

Paul



From ian at excess.org  Tue Feb  7 15:42:26 2006
From: ian at excess.org (Ian Ward)
Date: Tue, 07 Feb 2006 15:42:26 -0500
Subject: Problem with curses and UTF-8
Message-ID: <43E90632.1030306@excess.org>

When I run the following code in a terminal with the encoding set to
UTF-8 I get garbage on the first line, but the correct output on the second.


import curses
s = curses.initscr()
s.addstr('\xc3\x85 U+00C5 LATIN CAPITAL LETTER A WITH RING ABOVE\n')
s.addstr('\xc3\xa5 U+00F5 LATIN SMALL LETTER O WITH TILDE')
s.refresh()
s.getstr()
curses.endwin()


I tested with gnome-terminal, Python 2.4 and Ubuntu breezy.  The output
is correct when I run the following code:


print '\xc3\x85 U+00C5 LATIN CAPITAL LETTER A WITH RING ABOVE'
print '\xc3\xa5 U+00F5 LATIN SMALL LETTER O WITH TILDE'


Any Ideas?

Ian Ward




From mee at quidquam.com  Sun Feb 26 16:37:51 2006
From: mee at quidquam.com (Mike Erickson)
Date: Sun, 26 Feb 2006 13:37:51 -0800
Subject: Can optparse do dependencies?
In-Reply-To: <1140885582.311180.120550@i39g2000cwa.googlegroups.com>
References: <1140885582.311180.120550@i39g2000cwa.googlegroups.com>
Message-ID: <20060226213751.GB13919@gray.mee>

* Bob (bob.python at yahoo.com) wrote:
> I'd like to setup command line switches that are dependent on other
> switches, similar to what rpm does listed below. From the grammar below
> we see that the "query-options" are dependent on the query switch,
> {-q|--query}. Can "optparse" do this or do I have to code my own
> "thing"? Thanks.

After you pull your options and arguments from optparse, just check for
them, eg:

parser = optparse.OptionParser()
...
(options, args) = parser.parse_args()

if (option.q and not option.p):
	parser.error("you must use p to use q")

The meaning of -b doesn't change when it follows -a, but if you want
that, it is doable by extending optparse. There is even an example in
the very good "extending optik"[1] documentation available off the
sf.net site:

http://optik.sourceforge.net/

regards,

mike

[1]: optparse is also known as optik



From neuzhoundxx at yahoo.com  Fri Feb 17 18:18:46 2006
From: neuzhoundxx at yahoo.com (john peter)
Date: Fri, 17 Feb 2006 15:18:46 -0800 (PST)
Subject: commenting out blocks of code
Message-ID: <20060217231846.87613.qmail@web36708.mail.mud.yahoo.com>

 in java, i can  prevent a block of code from executing
  by bracketing the block with comment indicators, as shown
  below:
  /*
    statement1 will not execute;
    statement2 will not execute;
  */
    statement3 will execute
  
  is there a similar mechanism in python, other than prefixing
  the '#' character to the start of each statement i do  not
  want to execute (which gets old very quickly if one needs to
  comment and uncomment several statements a couple of
  times while "playing around with code" say during initial design)?
  

		
---------------------------------
 Yahoo! Autos. Looking for a sweet ride? Get pricing, reviews, & more on new and used cars.
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From eight02645999 at yahoo.com  Fri Feb 17 00:28:03 2006
From: eight02645999 at yahoo.com (eight02645999 at yahoo.com)
Date: 16 Feb 2006 21:28:03 -0800
Subject: days since epoch
Message-ID: <1140154082.952039.283420@g43g2000cwa.googlegroups.com>

hi
how can i get the number of days since epoch using the time module?
or do i have to manually do the arithmetic?
thanks



From pmartin at snakecard.com  Thu Feb 23 14:42:05 2006
From: pmartin at snakecard.com (Philippe Martin)
Date: Thu, 23 Feb 2006 13:42:05 -0600
Subject: pyserial
References: <1140702690.396244.142370@g43g2000cwa.googlegroups.com>
Message-ID: <heoLf.410477$0l5.143902@dukeread06>

Hi,

I never found the need to flush anything and I always use inWaiting prior to
reader.

A+

Philippe



Mimi wrote:

> Hi,
> I use the pyserial to read data from a serial port.
> My code is in window Xp and python 2.4. when I use Hyperteminal I can
> read data without try and try again that it is not the case with
> pyserial library.
> anyone can help me ?
> this is a part of my code:
> 
> self.ser = serial.Serial()
>     self.ser.baudrate = 9600
>             self.ser.port = 3
>             self.ser.timeout= 10
>             self.ser.bytesize = serial.EIGHTBITS
>             self.ser.stopbits = serial.STOPBITS_ONE
>             self.ser.xonxoff = 0
> 
>    nbHisto = 144
>    for i in range(0,nbHisto):
>                 while 1:
>                     print self.ser.flushInput()
>                     print self.ser.flushOutput()
>                     cmd = "%xs\r" %(i+1)
>                     self.ser.write("%s" %cmd)
> 
>                     #print cmd
> 
>                     histo = self.ser.readlines()
>                     #print histo
>                     if histo:
>                         if histo=="\r\n":
>                             pass
>                         else:
> 
>                             histoAdresse = int(histo[0].strip('\r\n'))
>                             print histoAdresse
> 
>                             try:
>                                 dateHisto_cur = listeFenetreNonNul["%s"
> %(histoAdresse)]
>                                 print dateHisto_cur
> 
> 
> self.ecrireHistoDansFic(histo,histoAdresse,dateHisto_cur,histoAdresse,i)
>                                 break
>                             except:
> 
>                                 print "Adresse pas trouvee dans le
> systeme %s" %(histoAdresse)
>                                 break
>                     # End if
> 
>                     sleep(10)
>                 # End while
>             #End for
> 
>             
>             self.ser.close()



From joel.hedlund at gmail.com  Sun Feb  5 08:30:45 2006
From: joel.hedlund at gmail.com (Joel Hedlund)
Date: Sun, 05 Feb 2006 13:30:45 GMT
Subject: Best way of finding terminal width/height?
Message-ID: <96nFf.43896$d5.199922@newsb.telia.net>

Hi all!

I use python for writing terminal applications and I have been bothered 
by how hard it seems to be to determine the terminal size. What is the 
best way of doing this?

At the end I've included a code snippet from Chuck Blake 'ls' app in 
python. It seems to do the job just fine on my comp, but regrettably, 
I'm not sassy enough to wrap my head around the fine grain details on 
this one. How cross-platform is this? Is there a more pythonic way of 
doing this? Say something like:

from ingenious_module import terminal_info
cols, rows = terminal_info.size()

Thanks for your time (and thanks Chuck for sharing your code!)
/Joel Hedlund
IFM Bioinformatics
Link?ping University

Chuck Blake's terminal_size code snippet:
(from http://pdos.csail.mit.edu/~cblake/cls/cls.py).

def ioctl_GWINSZ(fd):                  #### TABULATION FUNCTIONS
     try:                                ### Discover terminal width
         import fcntl, termios, struct, os
         cr = struct.unpack('hh',
                            fcntl.ioctl(fd, termios.TIOCGWINSZ, '1234'))
     except:
         return None
     return cr

def terminal_size():
     ### decide on *some* terminal size
     # try open fds
     cr = ioctl_GWINSZ(0) or ioctl_GWINSZ(1) or ioctl_GWINSZ(2)
     if not cr:
         # ...then ctty
         try:
             fd = os.open(os.ctermid(), os.O_RDONLY)
             cr = ioctl_GWINSZ(fd)
             os.close(fd)
         except:
             pass
     if not cr:
         # env vars or finally defaults
         try:
             cr = (env['LINES'], env['COLUMNS'])
         except:
             cr = (25, 80)
     # reverse rows, cols
     return int(cr[1]), int(cr[0])


From paul at boddie.org.uk  Sun Feb 19 16:02:16 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 19 Feb 2006 13:02:16 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
Message-ID: <1140382936.808627.40300@o13g2000cwo.googlegroups.com>

Torsten Bronger wrote:
> Hall?chen!
>
> Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> writes:
> >
> > Ok, then what do you think happens to 'machine' code ?
> >
> > "interpreted" usually means "no compilation, all parsing etc
> > redone at each execution", which is not the case with a
> > bytecode/vm based implementation.

Such criteria sound more like those which would distinguish interactive
languages from others.

> That sounds like an implementation feature rather than a language
> feature.  Besides, it's not a very sensible distinction in my
> opinion.  Much better is to think about the structure of the
> interpreting machine.

And it's even better to think about the nature of the machine...

> I'm not a CS person (only a physicist) but if
> you *need* a bytecode interpreter on top of the CPU interpretation,
> it's an interpreted language to me.

Yet one could potentially have that bytecode interpreter in hardware.
What typically prevents this is the potential difficulty of realising
complicated software designs in reasonably priced hardware, thus
introducing the nature of the machine: how complicated the instructions
are, what additional support would be required for implementing those
instructions, and so on. Low-level or systems programming languages are
compilable to instructions which are convenient to implement in
hardware and require little additional support: concepts such as stacks
(for various purposes) are supported by machine instructions and
registers, for example, whereas more advanced memory management is left
to software running on top of the virtual machine (although I imagine
that various Lisp machines did some interesting things in this domain).

> I've had such a discussion about TeX already, and my personal
> conclusion was that you can defend almost any opinion in that area.
> However, one should ensure that the definitions make a pragmatic and
> useful distinction.

Agreed. The CPython virtual machine consists of "complicated"
instructions: that is, some of those instructions may involve
non-trivial amounts of work and may be integrated with other subsystems
that can realistically only be implemented in software. Even virtual
machines like that of the Java platform have moderately high-level
instructions, resulting in various "Java optimised" hardware
implementations not attempting to provide a complete coverage of all
the available instructions (as far as I am aware).

I'm not sure why people get all defensive about Python's
interpreted/scripting designation or about the details of the CPython
implementation, especially considering that the virtual machine
technology in use has been around for a decade and a half, and that
various projects have been experimenting with alternatives.

Paul



From fabioxgn at gmail.com  Fri Feb 24 23:21:29 2006
From: fabioxgn at gmail.com (sapo)
Date: 24 Feb 2006 20:21:29 -0800
Subject: PyGTK + Glade = weird problem
References: <1140831896.360625.172620@p10g2000cwp.googlegroups.com>
	<1140838606.845184.304500@u72g2000cwu.googlegroups.com>
	<1140839146.072788.25120@j33g2000cwa.googlegroups.com>
	<1140839902.199924.249180@z34g2000cwc.googlegroups.com>
Message-ID: <1140841289.257523.124420@v46g2000cwv.googlegroups.com>

Anyway, now i tried in my glade app and i m getting this error when i
try to show the window:

GtkWarning: gtk_paint_flat_box: assertion `style->depth ==
gdk_drawable_get_depth (window)' failed

here is the code:

class main:
    def __init__(self):
        self.principal = gtk.glade.XML("scc.glade")
        self.w_cadcli = self.principal.get_widget("w_cadcli")
        dic = {"on_principal_destroy" : self.DestroyFunction,
               "on_sair_activate" : self.DestroyFunction,
               "on_w_cadcli_destroy" : self.show_hide_window,
               "on_cadcli_activate" : self.show_hide_window}
        self.principal.signal_autoconnect(dic)
        principal = self.principal.get_widget("principal")
        gtk.main()

    def DestroyFunction(self,*args):
        gtk.main_quit()

    def show_hide_window(self,obj,event=None):
        #if the second window is open hide it, if dont show it
        if self.w_cadcli.get_property("visible") == True:
            self.w_cadcli.hide()
        else:
            self.w_cadcli.show()
        return True



From port001 at gentoo.org  Sat Feb 18 16:08:59 2006
From: port001 at gentoo.org (Ian Leitch)
Date: Sat, 18 Feb 2006 21:08:59 +0000
Subject: Get parameters from URL using CGI
In-Reply-To: <1140285087.919635.74530@g43g2000cwa.googlegroups.com>
References: <1140285087.919635.74530@g43g2000cwa.googlegroups.com>
Message-ID: <43F78CEB.6010502@gentoo.org>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

abcd wrote:
> i want to create a CGI script which simply prints out values given via
> the URL (such as when a GET is performed).
> 
> So if I have a script named, foo.cgi ....and I access it by going to:
> 
> http://www.somesite.com/cgi-bin/foo.cgi?name=john&age=90
> 
> I want foo.cgi to print out:
> name: john
> age: 90
> 
> 
> how do i get the values from the URL like that?
> 
> thanks

>>> from urlparse import urlparse
>>> dict([n for n in [i.split('=') for i in
urlparse('http://www.somesite.com/cgi-bin/foo.cgi?name=john&age=90')[4].split('&')]])
{'age': '90', 'name': 'john'}
>>>

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.1 (GNU/Linux)

iD8DBQFD94zrefZ4eWAXRGIRAlEhAJ49x7kaIe/VcU5DUbt8bv9tQCNrmQCfWOED
tmkTISLqzIKDz2c4mfR6+k8=
=OMOX
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From n.estner at gmx.de  Thu Feb  2 17:08:22 2006
From: n.estner at gmx.de (n.estner at gmx.de)
Date: 2 Feb 2006 14:08:22 -0800
Subject: Another try at Python's selfishness
Message-ID: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>

Having read previous discussions on python-dev I think I'm not the only
Python programmer who doesn't particularly like python's "self"
parameter:

    class Foo:
        def bar(self, a,b):
            return a+b
    Foo().bar(1,2) => 3

The main reason (at least for me) is that there's simply too much
"magic" in it. Why does the expression left of the '.' get promoted to
the first parameter? It even goes further:

    Foo.bar(Foo(), 1,2)

works, but:

    Foo.bar(1,2,3)

doesn't, just because of the "magical first parameter" in a member
function. But:

    Foo.__dict["bar"]__(1,2,3)

Does work.

The point is, I _do_ think it's a good idea to explicitly write
"self.SomeMember" for member-access, so I thought: why can't we be
equally explicit about member function declaration? Wouldn't it be nice
if I could write (say, in Python 3k, or maybe later):

    class Foo:
        def self.bar(a,b):
            return a+b
    Foo().bar(1,2) => 3

That way, the declaration would match the invocation (at least
syntactically), and the "magic"-feeling is gone. In the long run, the
"old-style" syntax (i.e. if there's no '.' in the method name) could be
used for static methods.

What do you think?



From peter at engcorp.com  Mon Feb  6 17:21:29 2006
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 06 Feb 2006 17:21:29 -0500
Subject: Code Feedback
In-Reply-To: <pan.2006.02.06.21.37.32.698385@wolf.com>
References: <1139247238.520281.144670@f14g2000cwb.googlegroups.com>
	<pan.2006.02.06.21.37.32.698385@wolf.com>
Message-ID: <ds8i4u$2s3$1@sea.gmane.org>

Dan M wrote:
>>2) Anybody know how to alter the "while 1: pass" section to make the
>>app stoppable?
> 
> 
> That one I think I can help with! See below.
> 
> 
>>    while 1: pass
> 
> 
>       try:
> 	  while 1:
> 		pass
>       except KeyboardInterrupt:
> 	  break

That might make it "stoppable" (or at least more cleanly stoppable than 
it is now) but it doesn't make it efficient.

Adding something like "time.sleep(0.1)" in place of "pass" is 
advisable... or the main thread will be "busy-waiting", using up CPU 
time, while waiting for Ctrl-C...

-Peter



From bignose+hates-spam at benfinney.id.au  Thu Feb 16 22:32:44 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 17 Feb 2006 14:32:44 +1100
Subject: Evil, evil wxPython (and a glimmer of hope)
References: <1140116551.116322.12680@g43g2000cwa.googlegroups.com>
Message-ID: <8764ned5ib.fsf@rose.polar.local>

"vivainio at gmail.com" <vivainio at gmail.com> writes:
> I rarely do GUIs, and reminded myself today why that is the case
> (simply, it's not fun).

Programming C++ in Python isn't much fun, true.

> However, it should be pretty easy to write small wrapper over the
> wxPython api.
> [...]
> wxPython is great as it is (a simple wrapper for a C++ toolkit) and the
> basic design is ok & proven, I'm just too lazy to use it in its current
> form.

Fortunately, you're not alone in that thought. The wxPython project's
explicit goal is to make wxPython feel as much like wxWidgets as
feasible.

For those that want wxPython to feel more like Python than C++, Hans
Nowak started the 'wax' wrapper:

    "Simply put, Wax is a GUI toolkit. It sits on top of wxPython,
    removing some of the low-level aspects of that GUI, and adding
    some useful abstractions.

    The goal is that Wax should be easier to use than wxPython, but
    just as feature-rich. Maybe even more so.

    The actual situation is different. Frankly, I don't have the time
    to work on this project very much. That's why I only add new
    features when I need them. Some of my other projects (Firedrop,
    Sourcery, etc) use Wax, so over time, when I need more controls, I
    add them. On the other hand, a subset of controls is there, and is
    usable."

    <URL:http://zephyrfalcon.org/labs/dope_on_wax.html>
    <URL:http://zephyrfalcon.org/labs/wax.html>

The web content is a bit sparse; fortunately the code has seen more
love than the web pages. Wax was the focus of a couple of Google
"Summer of Code" projects, and new life seems to have been gained as a
result.

-- 
 \     "We are not gonna be great; we are not gonna be amazing; we are |
  `\        gonna be *amazingly* amazing!"  -- Zaphod Beeblebrox, _The |
_o__)                Hitch-Hiker's Guide To The Galaxy_, Douglas Adams |
Ben Finney <http://www.benfinney.id.au/>


From tim.hochberg at ieee.org  Mon Feb  6 12:55:16 2006
From: tim.hochberg at ieee.org (Tim Hochberg)
Date: Mon, 06 Feb 2006 10:55:16 -0700
Subject: Scientific Computing with NumPy
In-Reply-To: <ds7mrb$443$1@gemini.csx.cam.ac.uk>
References: <ds7bvh$ab1$2@gemini.csx.cam.ac.uk>	<mailman.1482.1139225595.27775.python-list@python.org>	<ds7ch4$bj7$1@gemini.csx.cam.ac.uk>	<1139229403.024321.215780@o13g2000cwo.googlegroups.com>
	<ds7mrb$443$1@gemini.csx.cam.ac.uk>
Message-ID: <ds82i7$4kh$1@sea.gmane.org>

mclaugb wrote:
> Is Scipy the same thing as ScientificPython?
> I am confused if SciPy is just the new version.  they appear to be separate 
> things.
> Bryan

No, Scientific Python is "a collection of Python modules that are useful 
for scientific computing" written by Konrad Hinsen. I'm not a user, but 
you can find information here:

	http://starship.python.net/~hinsen/ScientificPython/

SciPy is, I believe, a more recent and more ambitious project. In any 
event it is not directly related to ScientficPython. Information here:

	http://scipy.org/

Both of these packages are built on top of one of the three extant array 
extensions for Python. To try to clear up some of the confusion around 
those, let me summarize the states of these three packages as I 
understand it:

Numeric: This is the origingal array package.

Numarray: This was written as a replacement for Numeric. It has improved 
performance for large arrays. The internals were also simplified and 
many other improvements were made (arrays were subclassable, numeric 
signal handling vastly improved, etc). Unfortunately, a side effect of 
the changes was that small array performance got worse. There was a 
signifigant chunk of the numeric community for whom this was a deal 
breaker and as a result there ended up being a split between the Numeric 
and Numarray communities.

Numpy: This is a rewrite of Numeric that incorporates most of the 
improvements in Numarray. It is designed to bring the two halves of the 
Python numeric community back together. So far, it seems to have gotten 
a positive reception. It is currently at 0.9.4 and I expect a stable 1.0 
version in relatively short order. If I were starting with Python 
numerics, this is where I would start, although I've yet to start 
converting my Numarray based code over.

I hope that sheds some light on this.

regards,

-tim



> 
> "Brendan" <spam4bsimons at yahoo.ca> wrote in message 
> news:1139229403.024321.215780 at o13g2000cwo.googlegroups.com...
> 
>>As of version 0.4.x, Scipy exclusively uses the newer NumPy module
>>instead of the older Numeric module.  The confusion is inevitable in
>>this time of transition, but their intent is to standardize on one
>>array package.
>>
>>Brendan
>>--
>>Brendan Simons
>>
>>
>>
>>mclaugb wrote:
>>
>>>This page documents the differences.  It seems that NumPy is supported 
>>>and
>>>more recent.
>>>http://numeric.scipy.org/
>>>
>>>
>>>"linda.s" <samrobertsmith at gmail.com> wrote in message
>>>news:mailman.1482.1139225595.27775.python-list at python.org...
>>>On 2/6/06, mclaugb <mclaugb at nospm.yahoo.com> wrote:
>>>
>>>>Has anyone recompiled the Scientific Computing package using NumPy 
>>>>instead
>>>>of Numeric?
>>>>I need a least squares algorithm and a Newton Rhaphson algorithm which 
>>>>is
>>>>contained in Numeric but all the documentation out there says that 
>>>>Numeric
>>>>is crap and all code should be using NumPy.
>>>>Thanks,
>>>>Bryan
>>>
>>>what is the relationship between Numeric and Numpy?
>>
> 
> 



From fakeaddress at nowhere.org  Mon Feb  6 12:18:12 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Mon, 06 Feb 2006 17:18:12 GMT
Subject: Thread imbalance
In-Reply-To: <1139197849.994966.150810@z14g2000cwz.googlegroups.com>
References: <1138912272.382474.13170@g44g2000cwa.googlegroups.com>
	<ds3d35$mo6$2@bagan.srce.hr>
	<mailman.1427.1139097680.27775.python-list@python.org>
	<ds55tb$n00$1@bagan.srce.hr>
	<lukcu19iaqamsm5ohs618ckp169csrq8ql@4ax.com>
	<ds698k$n5l$2@bagan.srce.hr>
	<1139197849.994966.150810@z14g2000cwz.googlegroups.com>
Message-ID: <oxLFf.30420$H71.26518@newssvr13.news.prodigy.com>

Tuvas wrote:
> The stuff that it runs aren't heavily processor intensive, but rather
> consistant. It's looking to read incoming data. For some reason when it
> does this, it won't execute other threads until it's done. Hmmm.
> Perhaps I'll just have to work on a custom read function that doesn't
> depend so much on processing power.

That is odd. Python should release its global lock while waiting
for I/O, and thus other threads should run. What read function
are you using? Can you provide a minimal example of your problem?


-- 
--Bryan


From skip at pobox.com  Fri Feb 17 19:56:32 2006
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 17 Feb 2006 18:56:32 -0600
Subject: Class subscripting
In-Reply-To: <g3pcv1dj2ei00kf05rjdki0e6poo2favo2@4ax.com>
References: <g3pcv1dj2ei00kf05rjdki0e6poo2favo2@4ax.com>
Message-ID: <17398.28864.895485.799193@montanaro.dyndns.org>


    Ronny> Assume we have a class Foo, and instance called bar.  a variable
    Ronny> called baz1 has the value 3.0, baz2 is uninitialized

    Ronny> Is there a way of reflecting the variable with such syntax:

    Ronny> print bar[<var_index>], where var_index is a number representing
    Ronny> internal index.

    Ronny> bar[<var_index>] = 4.2. #Setting baz2 to 4.2

Sure.  Check out the special method names for container types:

    http://www.python.org/dev/doc/devel/ref/sequence-types.html

To index into instances of your class you need to define a __getitem__
method.

Skip



From python at rcn.com  Sat Feb 25 15:45:44 2006
From: python at rcn.com (Raymond Hettinger)
Date: 25 Feb 2006 12:45:44 -0800
Subject: Optimize flag question
In-Reply-To: <mailman.2425.1140850893.27775.python-list@python.org>
References: <400BDC416E2A0042AA35DF3919BB8A5115E147@mail.mtl.proksim.com>
	<mailman.2425.1140850893.27775.python-list@python.org>
Message-ID: <1140900344.645700.183830@i39g2000cwa.googlegroups.com>

[Olivier Langlois]
> > So my question is: what are the 'optimizations' that the Python
> > interpreter is doing when you specify the optimize flag and is there
> > anything I should be cautious about when using it?

Currently, -O provides no optimizations other than eliminating
assertions.


Raymond



From larry.bates at websafe.com  Fri Feb 17 19:54:53 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Fri, 17 Feb 2006 18:54:53 -0600
Subject: Class subscripting
In-Reply-To: <g3pcv1dj2ei00kf05rjdki0e6poo2favo2@4ax.com>
References: <g3pcv1dj2ei00kf05rjdki0e6poo2favo2@4ax.com>
Message-ID: <3bmdnVYcZPjF7WvenZ2dnUVZ_tudnZ2d@comcast.com>

Ronny Mandal wrote:
> Assume we have a class Foo, and instance called bar.
> 
> a variable called baz1 has the value 3.0, baz2 is uninitialized
> 
> Is there a way of reflecting the variable with such syntax:
> 
> print bar[<var_index>], where var_index is a number representing
> internal index.
> 
> bar[<var_index>] = 4.2. #Setting baz2 to 4.2
> 
> Thanks and regards,
> 
> Ronny Mandal

I can't figure out why did you tell us that baz1 has value of
3.0?  What does that have to do with anything?  It is also
uncloear how you think that setting something inside bar
class instance could possibly create a variable called
baz2?  Python doesn't have a concept of "unitialized" variables.
Before they are initialized they simply don't exist.  Variables
in Python aren't buckets, variables are pointers to information.
I think we need more information about what you are trying to
accomplish before we can help.

Just as a wild guess I think you want a dictionary.

vdict=['baz1': 3.0, 'baz2': None}

vdict['baz2']=4.2

print vdict['baz2']

if you insist on an index you can do:

vars=['baz1','baz2']

print vdict[vars[2]]

I'm REALLY guessing here, so I don't know if I'm helping.

-Larry Bates


From http  Tue Feb  7 19:18:50 2006
From: http (Paul Rubin)
Date: 07 Feb 2006 16:18:50 -0800
Subject: Hi reliability files, writing,reading and maintaining
References: <Y15Gf.280109$D47.254492@fe3.news.blueyonder.co.uk>
Message-ID: <7xvevqbt3p.fsf@ruckus.brouhaha.com>

"John Pote" <johnpote at blueyonder.co.uk> writes:
> 1. Are there any python modules 'out there' that might help in securely 
> writing such files.
> 2. Can anyone suggest a book or two on this kind of file management. (These 
> kind of problems must have been solved in the financial world many times).

It's a complicated subject and is intimately mixed up with details of
the OS and filesystem you're using.  The relevant books are books
about database implementation.  

One idea for your situation is use an actual database (e.g. MySQL or
PostgreSQL) to store the data, so someone else (the database
implementer) will have already dealt with the issues of making sure
data is flushed properly.  Use one of the Python DbAPI modules to
communicate with the database.


From huyslogic at gmail.com  Tue Feb  7 22:47:40 2006
From: huyslogic at gmail.com (Huy)
Date: 7 Feb 2006 19:47:40 -0800
Subject: apostrophe or double quote?
Message-ID: <1139370460.360400.232500@z14g2000cwz.googlegroups.com>

I've been unable to find information clarifying this but.  What is the
difference between 'somestring' and "somestring"?  When I use type() it
still reports as string.  If there is a difference could someone point
me to documentation or explain when to use and when not to?  Hope I
sound clear.



From rschroev_nospam_ml at fastmail.fm  Fri Feb 24 13:38:05 2006
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Fri, 24 Feb 2006 18:38:05 GMT
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <l3huv19vgbvkeje63g8h8r4ur3h7m7itud@4ax.com>
References: <mailman.2369.1140730029.27775.python-list@python.org>	<dtla7j$pqs$1@newsreader3.netcologne.de>	<mailman.2373.1140731808.27775.python-list@python.org>
	<hb7tv11kmpnd5m4qhhqg1mdq5n61uc7odq@4ax.com>
	<mailman.2402.1140792145.27775.python-list@python.org>
	<l3huv19vgbvkeje63g8h8r4ur3h7m7itud@4ax.com>
Message-ID: <hoILf.277253$OW4.9012287@phobos.telenet-ops.be>

Dennis Lee Bieber schreef:
> On Fri, 24 Feb 2006 08:44:49 -0600, Paul Probert <pprobert at wisc.edu>
> declaimed the following in comp.lang.python:
> 
>> This is now our leading suspect. All the affected machines have 
>> "abouttime.exe" running as a service, something our sysadmin put in a 
>> few years ago. We are currently disabling this and now waiting for the 
>> proof.
> 
> 	Hmmm, I wonder how compatible that is with WinXP -- since XP already
> has an internet time synch built into the date/time preferences page
> (need admin privs to view).

It's easily disabled. I disable it and use NTP for Windows instead on 
machines I control since it works much better.

> 	Pre-XP may not have had such...

Windows 2000 had it too, but there was no GUI to configure it; you had 
to manually edit the registry.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From bradfordh at gmail.com  Tue Feb  7 17:19:49 2006
From: bradfordh at gmail.com (Tempo)
Date: 7 Feb 2006 14:19:49 -0800
Subject: Is Python good for web crawlers?
In-Reply-To: <7x7j86rh16.fsf@ruckus.brouhaha.com>
References: <1139330008.270988.227170@g44g2000cwa.googlegroups.com>
	<7x1wyekj0n.fsf@ruckus.brouhaha.com>
	<dsb3mg$d99$1@apollon.grec.isp.9tel.net>
	<7x7j86rh16.fsf@ruckus.brouhaha.com>
Message-ID: <1139350789.535943.78940@g47g2000cwa.googlegroups.com>

I agree. I think the way that I will learn to use most of it is by
going through the source code.



From pslana at atronic.com  Thu Feb 16 07:10:50 2006
From: pslana at atronic.com (pierre_py)
Date: 16 Feb 2006 04:10:50 -0800
Subject: Excel and TrackChanges
In-Reply-To: <1139994904.451967.38560@g14g2000cwa.googlegroups.com>
References: <1139989519.840588.90820@z14g2000cwz.googlegroups.com>
	<1139994904.451967.38560@g14g2000cwa.googlegroups.com>
Message-ID: <1140091850.938410.125420@z14g2000cwz.googlegroups.com>

If i move the Save after the HighlightChangesOptions it will popup a
message saying it can only be used when workbook is saved.

The problem is actually not only in python, i figured out that the
samples in msdn (which do the same) don't work in VBA also (if i give
my macros a shortcut).

I have now fixed-it with ApplyAllChanges(), which gives me thing i need
(i need the track changes just to create a log file of whats
happening).

thanks



From port001 at gentoo.org  Fri Feb 17 14:30:44 2006
From: port001 at gentoo.org (Ian Leitch)
Date: Fri, 17 Feb 2006 19:30:44 +0000
Subject: Another stupid newbie question
In-Reply-To: <1140203709.145048.314180@g43g2000cwa.googlegroups.com>
References: <1140203709.145048.314180@g43g2000cwa.googlegroups.com>
Message-ID: <43F62464.1030609@gentoo.org>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Byte wrote:
> How can I make the following code:
> 
> from random import random
> 
> 
> 
> def stuff(a, mx):
>     x = 2
>     while x == 2:
>         x = random()
>         if x == mx: print x
>         else: print 'No luck,', x
>         x = 2
> 
> Stop when x == mx?
> 
> Thanks in advance,
>  -- /usr/bin/byte
> 

if x == mx:
    break
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Version: GnuPG v1.4.1 (GNU/Linux)

iD8DBQFD9iRkefZ4eWAXRGIRAjbLAKCdl5RwFWz7uHSZd38HUjpA4HLGegCfWeP9
9Xw6bHYXhLssLKfG73AOKJo=
=WUrH
-----END PGP SIGNATURE-----


From paschott at no.yahoo.spamm.com  Mon Feb  6 19:30:15 2006
From: paschott at no.yahoo.spamm.com (Peter A. Schott)
Date: Tue, 07 Feb 2006 00:30:15 GMT
Subject: Best way to capture output of another command-line program in
	Win32?
References: <qu7fu19vuoddfcn2fu3t23mfqg6536t6qn@4ax.com>
	<1139263882.684516.169070@o13g2000cwo.googlegroups.com>
Message-ID: <gdqfu1p7i7ru3pfmr9vgmcjpbt3vfm1utb@4ax.com>

Thanks, I'll give this a try when I get a chance and will post back if we have
any issues.

-Pete

"Grig Gheorghiu" <grig.gheorghiu at gmail.com> wrote:

> subprocess gets my vote too.
> 
> You can do something like:
> 
> from subprocess import call, Popen, PIPE, STDOUT
> 
> def run_cmd(cmd):
> ....arglist = cmd.split()
> ....p = Popen(arglist, stdout=PIPE, stderr=STDOUT)
> ....output = p.communicate()[0]
> ....return (p.returncode, output)
> 
> rc, output = run_cmd("python setup.py test")
> if rc:
> ....print "Command failed"
> ....sys.exit(rc)
> 
> Grig


From bblais at bryant.edu  Mon Feb  6 08:27:43 2006
From: bblais at bryant.edu (Brian Blais)
Date: Mon, 06 Feb 2006 08:27:43 -0500
Subject: Numeric and matlab
In-Reply-To: <1139217218.843970.138790@f14g2000cwb.googlegroups.com>
References: <mailman.1452.1139174878.27775.python-list@python.org>
	<1139217218.843970.138790@f14g2000cwb.googlegroups.com>
Message-ID: <43E74ECF.8070905@bryant.edu>

Bas wrote:
> I am also considering a switch from Matlab to NumPy/SciPy at some
> point.
> 
> Note that in the last version of Matlab (7?) you don't have to use
> 'find', but you now can 'conditional arrays'  as an index, so instead
> of
>   idx=find(a>5);
>   a(idx)=6;
> you can do:
>   cond=a>5;
>   a(cond) = 6;
> or even shorter
>   a(a>5) = 6;
> 
> Does someone know if the same trick is possible in NumPy?
> 

A response I got back from someone else is, yes.  I tested it, and it works in numpy.
  You can do:

import numpy
a=numpy.arange(0,10,.1)
a[a>5]=6


			bb


-- 
-----------------

             bblais at bryant.edu
             http://web.bryant.edu/~bblais



From bearophileHUGS at lycos.com  Sat Feb  4 04:51:44 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 4 Feb 2006 01:51:44 -0800
Subject: python's library support
In-Reply-To: <mailman.1408.1139035874.27775.python-list@python.org>
References: <1139025112.098122.131330@z14g2000cwz.googlegroups.com>
	<mailman.1408.1139035874.27775.python-list@python.org>
Message-ID: <1139046704.610049.302320@g47g2000cwa.googlegroups.com>

Robert Kern>And several others if you google a bit.

Yes:
http://sourceforge.net/projects/pynetwork/

Bye,
bearophile



From grante at visi.com  Tue Feb 28 15:38:08 2006
From: grante at visi.com (Grant Edwards)
Date: Tue, 28 Feb 2006 20:38:08 -0000
Subject: Thread Question
References: <1141155072.500444.215130@v46g2000cwv.googlegroups.com>
	<1209cbiq1kjbh06@corp.supernews.com>
	<1141158663.553406.303780@t39g2000cwt.googlegroups.com>
Message-ID: <1209d5gqkhn1p41@corp.supernews.com>

On 2006-02-28, D <duncanm255 at hotmail.com> wrote:

> Thanks, Grant.  I apologize for not being clear on what I
> meant by using "classes".  This is an example of what I was
> referring to:
> http://www.wellho.net/solutions/python-python-threads-a-first-example.html

Ah, I see.  I had forgotten that people subclass Thread like
that.  It's mostly just a matter of style.  There aren't any
practical differences that I can think of.

-- 
Grant Edwards                   grante             Yow!  BARBARA STANWYCK
                                  at               makes me nervous!!
                               visi.com            


From rob at digital-crocus.com  Wed Feb  8 08:18:20 2006
From: rob at digital-crocus.com (Robin Haswell)
Date: Wed, 08 Feb 2006 13:18:20 +0000
Subject: Python threading, and processes
Message-ID: <pan.2006.02.08.13.18.20.728051@digital-crocus.com>

Hey there

I'm doing some threading in python with Python 2.3 and 2.4 on Ubuntu and
Debian machines, and I've noticed that if I open a lot of threads (say,
50), I get lots of python processes with individual PIDs, which consume a
disproportionate amount of CPU. Does this mean that Python is using the
dummy_thread module by accident? And is there a realistic limitation to
the number of threads I can do?

Cheers

-Rob


From steve at REMOVETHIScyber.com.au  Fri Feb 24 05:27:39 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 24 Feb 2006 21:27:39 +1100
Subject: Unexpected timing results
References: <pan.2006.02.23.15.38.11.944281@REMOVETHIScyber.com.au>
	<43FDDDB2.7050703@websafe.com>
	<pan.2006.02.23.22.04.04.778895@REMOVETHIScyber.com.au>
	<dtmijn$6uq$1@wake.carmen.se>
Message-ID: <pan.2006.02.24.10.27.39.349356@REMOVETHIScyber.com.au>

On Fri, 24 Feb 2006 10:11:18 +0100, Magnus Lycka wrote:

> Steven D'Aprano wrote:
>> It looks like the time function under Linux at least is very slow.
> 
> Perhaps you should try doing the same thing in C.
> Then you can see whether the problem is in the
> wrapper or in the system call.

Good idea.

Now, has anyone got a copy of "Learning C for Dummies" I can borrow?

*chagrined smile*


-- 
Steven.



From zzhikang at hotmail.com  Thu Feb 23 01:57:50 2006
From: zzhikang at hotmail.com (kanchy kang)
Date: Thu, 23 Feb 2006 06:57:50 +0000
Subject: why don't many test frameworks support file-output?
Message-ID: <BAY108-F125E8738194B5113DC85C0CDF20@phx.gbl>

i browsed the following frameworks briefly: nose, OOBTest,
testosterone,  py.test, Sancho ... and found out they do support imediate 
screen-output only.

_________________________________________________________________
Don?t just search. Find. Check out the new MSN Search! 
http://search.msn.click-url.com/go/onm00200636ave/direct/01/



From larry.bates at websafe.com  Tue Feb  7 20:20:02 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 07 Feb 2006 19:20:02 -0600
Subject: Hi reliability files, writing,reading and maintaining
In-Reply-To: <Y15Gf.280109$D47.254492@fe3.news.blueyonder.co.uk>
References: <Y15Gf.280109$D47.254492@fe3.news.blueyonder.co.uk>
Message-ID: <3IOdnSzGDJDU2nTeRVn-pQ@comcast.com>

John Pote wrote:
> Hello, help/advice appreciated.
> 
> Background:
> I am writing some web scripts in python to receive small amounts of data 
> from remote sensors and store the data in a file. 50 to 100 bytes every 5 or 
> 10 minutes. A new file for each day is anticipated.  Of considerable 
> importance is the long term availability of this data and it's gathering and 
> storage without gaps.
> 
> As the remote sensors have little on board storage it is important that a 
> web server is available to receive the data. To that end two separately 
> located servers will be running at all times and updating each other as new 
> data arrives.
> 
> I also assume each server will maintain two copies of the current data file, 
> only one of which would be open at any one time, and some means of 
> indicating if a file write has failed and which file contains valid data. 
> The latter is not so important as the data itself will indicate both its 
> completeness (missing samples) and its newness because of a time stamp with 
> each sample.
> I would wish to secure this data gathering against crashes of the OS, 
> hardware failures and power outages.
> 
> So my request:
> 1. Are there any python modules 'out there' that might help in securely 
> writing such files.
> 2. Can anyone suggest a book or two on this kind of file management. (These 
> kind of problems must have been solved in the financial world many times).
> 
> Many thanks,
> 
> John Pote
> 
> 
Others have made recommendations that I agree with: Use a REAL
database that supports transactions.  Other items you must
consider:

1) Don't spend a lot of time engineering your software and then
purchase the cheapest server you can find.  Most fault tolerance
has to due with dealing with hardware failures.  Eliminate as
many single-point-of-failure devices as possible.  If your
application requires 99.999 uptime, consider clustering.

2) Using RAID arrays, multiple controllers, ECC memory, etc. is
not cheap but then fault tolerance requires such investments.

3) Don't forget that power and Internet access are normally the
final single point of failure.  It doesn't matter about all the
rest if the power is off for an extended period of time.  You
will need to host your server(s) at a hosting facility that has
rock-solid Internet pipes and generator backed power.  It won't
do any good to have a kick-ass server and software that can
handle all types of failures if someone knocking over a power
pole outside your office can take you offline.

Hope info helps.

-Larry Bates
in a hosting facility


From roy at panix.com  Wed Feb  1 08:17:52 2006
From: roy at panix.com (Roy Smith)
Date: Wed, 01 Feb 2006 08:17:52 -0500
Subject: triple quoted strings as comments
References: <1138667355.631379.249770@o13g2000cwo.googlegroups.com>
	<drppbn$3rg$1@wake.carmen.se>
Message-ID: <roy-42D40A.08175201022006@reader2.panix.com>

Magnus Lycka <lycka at carmen.se> wrote:
> An editor that adds/removes '# ' in the beginning of each
> marked line is fairly bullet proof. Adding e.g. /* to the
> beginning of a block you want to comment out, & */ to the
> end, breaks if you have /* */ style comments in the block!

/* */ also allows for some truly spectacularly bad coding practices.  Not 
long ago, I ran into some real-life code where a previous developer had 
commented out about 50 lines of C++ code by just putting a /* at the top 
and a */ at the bottom.  I was tearing my hair out trying to figure out how 
the code worked until I noticed what he had done.


From tjreedy at udel.edu  Tue Feb 14 22:24:12 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 14 Feb 2006 22:24:12 -0500
Subject: Unexpected behaviour of getattr(obj, __dict__)
References: <pan.2006.02.14.11.36.28.723688@REMOVETHIScyber.com.au><1139919112.714167.203760@f14g2000cwb.googlegroups.com>
	<1139920307.858786.20310@g44g2000cwa.googlegroups.com>
Message-ID: <dsu6sq$k8i$1@sea.gmane.org>


"Carl Banks" <invalidemail at aerojockey.com> wrote in message 
news:1139920307.858786.20310 at g44g2000cwa.googlegroups.com...
> But wait, it gets weirder.

Not weird at all.  Just an artifact of CPython's storage recycling 
algorithm.

>>>> id(Parrot.f) == id(Parrot.f)
> True
>>>> id(Parrot.__dict__) == id(Parrot.__dict__)
> True

A wrapper is created and passed to id() which returns an int object while 
releasing the wrapper back to the free list.  Then another wrapper is 
created in the same chunk of memory and passed to id, which returns an int 
of the same value for comparison.  The language ref only guarantees 
uniqueness of ids at any particular instant and allows reuse of ids of 
deallocated objects.

I half seriously think the lib ref entry for id() should have a warning 
that naive use can mislead.

> But that's not all.  Redefine Parrot as:
>
> class Parrot(object):
>    def f(self): pass
>    def g(self): pass
>
> Then,
>
>>>> id(Parrot.f) == id(Parrot.g)
> True

Same thing.  The wrapper content is not relevant as long as it uses the 
same memory block.

Terry Jan Reedy







From johnzenger at gmail.com  Fri Feb 24 11:37:50 2006
From: johnzenger at gmail.com (johnzenger at gmail.com)
Date: 24 Feb 2006 08:37:50 -0800
Subject: Regular expression fun. Repeated matching of a group Q
References: <1140794885.460929.223080@i39g2000cwa.googlegroups.com>
	<1140796529.104793.54160@e56g2000cwe.googlegroups.com>
	<1140797999.467407.173080@u72g2000cwu.googlegroups.com>
Message-ID: <1140799070.650639.205880@v46g2000cwv.googlegroups.com>

You can check len(sanesplit) to see how big your list is.  If it is <
2, then there were no  <td>'s, so move on to the next line.

It is probably possible to do the whole thing with a regular
expression.  It is probably not wise to do so.  Regular expressions are
difficult to read, and, as you discovered, difficult to program and
debug.  In many cases, Python code that relies on regular expressions
for lots of program logic runs slower than code that uses normal
Python.

Suppose "words" contains all the words in English.  Compare these two
lines:

foobarwords1 = [x for x in words if re.search("foo|bar", x) ]
foobarwords2 = [x for x in words if "foo" in x or "bar" in x ]

I haven't tested this with 2.4, but as of a few years ago it was a safe
bet that foobarwords2 will be calculated much, much faster.  Also, I
think you will agree, foobarwords2 is a lot easier to read.



From john_zenger at yahoo.com  Sat Feb 18 08:25:42 2006
From: john_zenger at yahoo.com (John Zenger)
Date: Sat, 18 Feb 2006 08:25:42 -0500
Subject: strange error I can't figure out...
In-Reply-To: <mailman.2093.1140267254.27775.python-list@python.org>
References: <mailman.2093.1140267254.27775.python-list@python.org>
Message-ID: <nrSdnRNFGZDBvWrenZ2dnUVZ_v2dnZ2d@comcast.com>

It works fine for me.  You must be having an indentation problem.

Also, get rid of the comma at the end of that last print statement.

Brian Blais wrote:
> Hello,
> 
> I have an odd kind of Heisenbug in what looks like a pretty simple 
> program.  The program is a progress bar code I got at the Python Cookbook:
> 
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/168639
> 
> (including the code below)
> 
> 
> If you uncomment the one print statement I added in the progressBar 
> class, you get the error:
> 
>   File "test_progress2.py", line 19
>     diffFromMin = float(self.amount - self.min)
>     ^
> SyntaxError: invalid syntax
> 
> 
> yet, without the print statement, it works fine.  what am I overlooking 
> here?
> 
> 
>             thanks,
> 
> 
>                     bb
> 
> #------------------------------------------------------------------------
> 
> class progressBar:
>     def __init__(self, minValue = 0, maxValue = 10, totalWidth=12):
>         self.progBar = "[]"   # This holds the progress bar string
>         self.min = minValue
>         self.max = maxValue
>         self.span = maxValue - minValue
>         self.width = totalWidth
>         self.amount = 0       # When amount == max, we are 100% done
>         self.updateAmount(0)  # Build progress bar string
> 
>     def updateAmount(self, newAmount = 0):
>         if newAmount < self.min: newAmount = self.min
>         if newAmount > self.max: newAmount = self.max
>         self.amount = newAmount
> 
> #        print "hello"   #<--------------  uncomment line to break
> 
>         # Figure out the new percent done, round to an integer
>         diffFromMin = float(self.amount - self.min)
>         percentDone = (diffFromMin / float(self.span)) * 100.0
>         percentDone = round(percentDone)
>         percentDone = int(percentDone)
> 
>         # Figure out how many hash bars the percentage should be
>         allFull = self.width - 2
>         numHashes = (percentDone / 100.0) * allFull
>         numHashes = int(round(numHashes))
> 
>         # build a progress bar with hashes and spaces
>         self.progBar = "[" + '#'*numHashes + ' '*(allFull-numHashes) + "]"
> 
>         # figure out where to put the percentage, roughly centered
>         percentPlace = (len(self.progBar) / 2) - len(str(percentDone))
>         percentString = str(percentDone) + "%"
> 
>         # slice the percentage into the bar
>         self.progBar = self.progBar[0:percentPlace] + percentString + 
> self.progBar[percentPlace+len(percentString):]
> 
>     def __str__(self):
>         return str(self.progBar)
> 
> 
> if __name__ == "__main__":
> 
>     import time
>     prog = progressBar(0, 100, 77)
>     for i in xrange(101):
>         prog.updateAmount(i)
>         print prog, "\r",
>         time.sleep(.05)
> 
> 


From bonono at gmail.com  Mon Feb 20 03:45:21 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 20 Feb 2006 00:45:21 -0800
Subject: Quesion about the proper use of __slots__
In-Reply-To: <1140424508.393412.79140@o13g2000cwo.googlegroups.com>
References: <1140424508.393412.79140@o13g2000cwo.googlegroups.com>
Message-ID: <1140425121.522399.156570@f14g2000cwb.googlegroups.com>


Zefria wrote:
> >>> class Fighter:
> ...     '''Small one man craft that can only harm other fighters on
> their own.'''
> ...     def __init__(self,statsTuple=(50,5,0,(2,4),1)):
> ...             self.fuel = statsTuple[0]
> ...             self.life = statsTuple[1]
> ...             self.armor = statsTuple[2]
> ...             self.weapon = statsTuple[3]
> ...             self.bulk = statsTuple[4]
> ...             __slots__ =
> [self.fuel,self.life,self.armor,self.weapon,self.bulk]
> ...
> >>> ral = Fighter()
> >>> ral.rocks = 2
> >>> ral.rocks
> 2
> >>> ral.life
> 5
>
> I was reading the special methods, got to slots
> (http://docs.python.org/ref/slots.html) and decided that i should use
> this to save memory in the program because it'll have to support very
> large numbers of fighers at once. It says that once you define slots
> then you can't add any variables not listed in slots, but from that
> example section I just did, so am I doing something wrong or did I read
> it wrong?

Seems that __slots__  in your case is nothing but a 'local variable' to
the function __init__. I think you need something like this :

class Test(object):
  __slots__ = ['attr1','attr2']



From kp8 at mac.com  Sun Feb 26 22:52:22 2006
From: kp8 at mac.com (kpp9c)
Date: 26 Feb 2006 19:52:22 -0800
Subject: ls files --> list packer
In-Reply-To: <dtml8u$1vh$1@gemini.csx.cam.ac.uk>
References: <1140765792.864556.289820@i40g2000cwc.googlegroups.com>
	<1140767111.490691.42460@e56g2000cwe.googlegroups.com>
	<dtml8u$1vh$1@gemini.csx.cam.ac.uk>
Message-ID: <1141012342.805500.308750@i39g2000cwa.googlegroups.com>

os.listdir works great ... just one problem, it packs the filenames
only into a list... i need the full path and seach as i might i se NO
documentation on python.org for os.listdir()

how do i either grab the full path or append it later ...



From onurb at xiludom.gro  Fri Feb  3 09:22:21 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Fri, 03 Feb 2006 15:22:21 +0100
Subject: OO conventions
In-Reply-To: <1138928426.867847.66790@g44g2000cwa.googlegroups.com>
References: <mailman.1334.1138833641.27775.python-list@python.org>
	<43E13F39.2070709@freenet.de>
	<1138928426.867847.66790@g44g2000cwa.googlegroups.com>
Message-ID: <43e36755$0$26603$636a55ce@news.free.fr>

Blair P. Houghton wrote:

(snip)

> So Image.open(filename) seems right as a factory function that opens
> the file, figures out what it really is, constructs the appropriate
> subclass object (likely by passing a string to the constructor, e.g.,
> JPGImage(filename)), and returns the object via the superclass type.

Why "via the superclass type" ? "returns the object" is enough.

> The caller can then either check a flag in the superclass to see what
> type the subclass is,

Why the h... ? We don't care what type it is, as long at it does what we
expect it to do.

> or just assume it's the right type of image

Yes

(snip)
> (or does Python have RTTI?

Much better than 'RTTI'.

> I don't recall if
> I've seen it, yet...).

obj.__class__ is a reference to the class (which is itself an object...)


> Though if the filename doesn't match the content, someone should raise
> an exception...

Why ? filenames and extensions are nothing more than conventions.
Image.open() 's responsability is to create an object of the appropriate
class, period. If *your program* needs to ensure that the image type
matches the filename, it's your problem to check this.

> But this means that Image.open(filename) is a static method of the
> superclass, not requiring instantiation.

AFAIK, it's just a function in the Image module (which is itself an
object - instance of class module - but that's orthogonal).

>  Image(string) could easily
> default to assuming string is a filename, doing the same work as
> Image.open(filename), though it would at least partially construct an
> Image instance each time it's called, which isn't what you want.
> Image.open(filename) defined as a static method (wait...is that
> possible in Python? I hate being the newbie) 

It is (search for 'staticmethod' and 'classmethod'). But there's not
much use for 'static methods' in Python - we usually just use plain
functions ('classmethods' are another beast - much more useful than
staticmethods)


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From hancock at anansispaceworks.com  Tue Feb 28 22:08:51 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Tue, 28 Feb 2006 21:08:51 -0600
Subject: Use empty string for self
In-Reply-To: <1141170846.619246.163470@t39g2000cwt.googlegroups.com>
References: <1141170846.619246.163470@t39g2000cwt.googlegroups.com>
Message-ID: <20060228210851.7b1cf194@samwise.anansi>

On 28 Feb 2006 15:54:06 -0800
paullanier at gmail.com wrote:
> The issue I have with self. is that is makes the code
> larger and more complicated than it needs to be. 
> Especially in math expressions like: self.position[0] =
> self.startx + len(self.bitlist) * self.bitwidth
> 
> It really makes the code harder to read.  On the other
> hand, eliminating the self. would create other issues
> including readability with regards to which vars are
> instance vars and which come from somewhere else.
> 
> But what if we keep the '.' and leave out the self.  Then
> the example looks like:
> .position[0] = .startx + len(.bitlist) * .bitwidth

I think I'm not the only person who hates this idea. The "."
is just too cryptic, IMHO. The main objection is that it
would require "magic" to make it work, though.

However, there is a slightly less onerous method which
is perfectly legit in present Python -- just use "s"
for "self":

  def mymethod(s):
      # ...
      s.position[0] = s.startx + len(s.bitlist) * s.bitwidth
      # ...

"self" is NOT a keyword, it's just a convention.

While I still generally prefer to see "self", I still
consider the above pretty readable, and it goes more than
halfway towards your goal.

Others have suggested "_" instead of "s". However, IMHO,
it's less visible, takes up the same space as "s", and
requires the shift key, so I'd rather just use "s".

And yes, it's been discussed to death on the list. ;-)

Cheers,
Terry


-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From http  Sat Feb 25 07:17:51 2006
From: http (Paul Rubin)
Date: 25 Feb 2006 04:17:51 -0800
Subject: Import in a separate thread
References: <1140869286.548125.17710@p10g2000cwp.googlegroups.com>
Message-ID: <7xbqwvk4y8.fsf@ruckus.brouhaha.com>

"cyberco" <cyberco at gmail.com> writes:
> I want to import a long list of modules in a separate thread to speed
> things up. How can I make the modules imported in that separate thread
> accessible outside the method?

It won't speed things up unless the main thread is waiting for user
input during those imports, or something like that.  Threads in Python
don't really run in parallel.

> # import rest in a separate thread
> def importRest():
>     import audio
>     import socket
> thread.start_new_thread(importRest,())
> 
> # audio.somemethod()  would fail here

Here's one way:

def importRest():
   global audio
   import audio as local_audio
   audio = local_audio
   # etc. 

There's surely other ways that are better.  


From mrstephengross at hotmail.com  Tue Feb 21 09:31:48 2006
From: mrstephengross at hotmail.com (Stephen Gross)
Date: Tue, 21 Feb 2006 09:31:48 -0500
Subject: Building python 2.4.2 on Cygwin
References: <1140467074.739405.163440@g44g2000cwa.googlegroups.com>
	<20060220214414.GA1924@tishler.net>
	<BAY103-DAV260105A00AAD2FCF161F8DBFC0@phx.gbl>
	<20060221133709.GB2552@tishler.net>
Message-ID: <BAY103-DAV57F9CCBBF26B0B2302C2CDBFC0@phx.gbl>

>Just to be sure, what does the following indicate?
    $ cygcheck -c cygwin
Cygwin Package Information
Package              Version        Status
cygwin               1.5.18-1       OK

>BTW, can you use the pre-built Python 2.4.1 that is part of the standard
Cygwin distribution?

Nope--I need to do a custom python build for a very specific situation...

Thanks,
--Steve


From rtilley at vt.edu  Mon Feb 27 15:44:01 2006
From: rtilley at vt.edu (rtilley)
Date: Mon, 27 Feb 2006 15:44:01 -0500
Subject: spaces at ends of filenames or directory names on Win32
In-Reply-To: <dtkuav$keb$1@solaris.cc.vt.edu>
References: <dtkuav$keb$1@solaris.cc.vt.edu>
Message-ID: <dtvoap$44m$1@solaris.cc.vt.edu>

This will at least allow me to ID folders that start with whitespace... 
from within Windows too :) yet I still cannot rename the folders after 
stripping the whitespace... attempting to gives an [Errno 2] No such 
file or directory. The strip seems to work right too according to the 
prints before and after.

import os
import os.path
import string

dirs =  os.listdir(os.getcwd())
path = os.getcwd()
##print path

for d in dirs:
     # If the first space in a folder name is whitespace.
     if d[0] in string.whitespace:
##        print d
         try:
             new_path = os.path.join(path, d.strip())
             old_path = os.path.join(path, d)
             print new_path
             print old_path
             os.renames(old_path, new_path)
         except Exception, e:
             print e
     else:
         pass


From nephish at xit.net  Tue Feb  7 08:31:19 2006
From: nephish at xit.net (nephish at xit.net)
Date: 7 Feb 2006 05:31:19 -0800
Subject: in over my head ascii
In-Reply-To: <36mgu1dj9rqh3t8htppm41otgrgf70ob1t@4ax.com>
References: <1139245216.350356.272170@z14g2000cwz.googlegroups.com>
	<sk4fu1ljvt7h7d6euj7nq06e1e0ml8p8u5@4ax.com>
	<1139251420.501345.91850@g44g2000cwa.googlegroups.com>
	<1139256817.218319.160370@f14g2000cwb.googlegroups.com>
	<1139259694.603482.293660@g14g2000cwa.googlegroups.com>
	<1139260158.822523.308780@g47g2000cwa.googlegroups.com>
	<1139273414.645101.237780@z14g2000cwz.googlegroups.com>
	<1139289681.648488.7060@g43g2000cwa.googlegroups.com>
	<36mgu1dj9rqh3t8htppm41otgrgf70ob1t@4ax.com>
Message-ID: <1139319079.318524.158460@f14g2000cwb.googlegroups.com>

i'm not sure, but its kinda been a pain in the hinder for a newbie like
me to find it in their docs.
thanks for all the help guys, let you know how it goes



From countessk at catfolks.net  Mon Feb 13 19:57:33 2006
From: countessk at catfolks.net (Countess Katzenplatzen)
Date: Mon, 13 Feb 2006 16:57:33 -0800
Subject: hard disk activity
References: <1139850420.902979.71620@o13g2000cwo.googlegroups.com>
	<g9i1v1lbf2rhmgskmkh5f9mt73s67umckk@4ax.com>
	<1139857505.376840.37440@g43g2000cwa.googlegroups.com>
	<1139859890.407497.124870@o13g2000cwo.googlegroups.com>
	<1139863885.755813.324450@g47g2000cwa.googlegroups.com>
	<7xfymn0yda.fsf@ruckus.brouhaha.com>
	<1139864840.300396.170070@o13g2000cwo.googlegroups.com>
	<7xbqxb0xo0.fsf@ruckus.brouhaha.com>
	<1139866059.604198.245040@g44g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.14.00.57.33.138407@catfolks.net>

> So I'm wondering if you know off-hand which windows port does this
> checksum validation you outlined.

http://www.gaztronics.net/rsync.php is one source.

Just do a Google search for "windows rsync".


From sw at wordtech-software.com  Sun Feb  5 13:55:50 2006
From: sw at wordtech-software.com (Kevin Walzer)
Date: Sun, 05 Feb 2006 13:55:50 -0500
Subject: Most prominent Tkinter applications?
Message-ID: <a24fa$43e64a39$4275d90a$26634@FUSE.NET>

I'm looking for examples of "best practices" in Tkinter/Python
programming. What are the most prominent Python applications out there
that use Tkinter as the GUI toolkit? These can be commercial or
open-source, but are preferably multi-platform.

I know IDLE is written in Tkinter, so that's one example. Can anyone
direct me to others?

-- 
Cheers,

Kevin Walzer, PhD
WordTech Software - "Tame the Terminal"
http://www.wordtech-software.com
sw at wordtech-software.com


From steve at holdenweb.com  Wed Feb 15 21:43:01 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 15 Feb 2006 21:43:01 -0500
Subject: Is empty string cached?
In-Reply-To: <cUMIf.11894$MJ.4803@fed1read07>
References: <cUMIf.11894$MJ.4803@fed1read07>
Message-ID: <dt0org$3vs$1@sea.gmane.org>

Farshid Lashkari wrote:
> When I pass an empty string to a function is a new string object created 
> or does python use some global pre-created object? I know python does 
> this with integer objects under a certain value. For instance, in the 
> following code is a new string object created for each function call?
> 
> func(0,'')
> func(1,'')
> func(2,'')
> func(3,'')
> 
> I tried the following commands in the interactive shell:
> 
>  >> x = ''
>  >> y = ''
>  >> x is y
> True
>  >> x = 'hello'
>  >> y = 'hello'
>  >> x is y
> True
> 
> This leads me to believe that python does reuse existing strings, but 
> once the variables are removed, does the item still exist in the cache?
> 
It takes far too little evidence to induce belief:

  >>> a = "hello"
  >>> b = "h"+"ello"
  >>> a is b
False
  >>> c = "hello"
  >>> b is a
False
  >>>

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From niemand.leermann at thomas-guettler.de  Sat Feb  4 15:02:29 2006
From: niemand.leermann at thomas-guettler.de (Thomas Guettler)
Date: Sat, 04 Feb 2006 21:02:29 +0100
Subject: Webmail with Python
Message-ID: <pan.2006.02.04.20.02.29.212441@thomas-guettler.de>

Hi,

Is there an application like Squirrelmail[1] written in python?

I want to access IMAP folder with a web-browser.

Google shows me some dead projects. Most webmail applications
seem to be written in PHP. Is there a useable webmailer written
in python?


 Thomas

-- 
Thomas Guettler, http://www.thomas-guettler.de/
E-Mail: guettli (*) thomas-guettler + de
Spam Catcher: niemand.leermann at thomas-guettler.de




From nun at example.com  Tue Feb  7 16:38:19 2006
From: nun at example.com (Mitja Trampus)
Date: Tue, 07 Feb 2006 22:38:19 +0100
Subject: tricky regular expressions
In-Reply-To: <1139343779.721205.221410@f14g2000cwb.googlegroups.com>
References: <1139343779.721205.221410@f14g2000cwb.googlegroups.com>
Message-ID: <fr8Gf.501$76.291195@news.siol.net>

[hint: posting the same question in newsgroups generally 
does not help to get responses any quicker]

Ernesto wrote:
 > The string I'm getting data from looks like this:
 > [USELESS DATA]
 > Request : Play
 > [USELESS DATA]
 > Title: Beethoven's 5th
 > [USELESS DATA]
 > Request : next
 > [USELESS DATA]
 > Title:  song #2
 > .....
 > The problem is that I only want the "Titles" which are 
either:
 > a) Followed by "Request : Play"
 > b) Followed by "Request : next"
 >
 > I'm not sure if I should use RE's or some other mechanism.

I'd advise against REs - they can quickly get messy. What 
I'd do is just what you have described:
1) read all lines that are not [USELESS DATA] (i.e. lines 
beginning with either Title or Request) into a list
2) walk through this list, deleting all "Title" lines that 
are not followed by an appropriate "Request" line.

Your description is not very exact - but if anything else 
needs to be filtered out, just do so. The general idea is to 
break your task into smaller steps (instead of one huge RE) 
that are easier to manage, write and understand.


From pbouige at electre.pasteur.fr  Sun Feb 12 15:31:49 2006
From: pbouige at electre.pasteur.fr (Philippe  Bouige)
Date: Sun, 12 Feb 2006 20:31:49 +0000 (UTC)
Subject: python and webcam
References: <1139773485.698970.195320@z14g2000cwz.googlegroups.com>
Message-ID: <slrnfa00000duv6pl.915o.pbouige@electre.pasteur.fr>

In article <1139773485.698970.195320 at z14g2000cwz.googlegroups.com>, 
 dfaber wrote:

> I have Logitech webcam and I need to grab images on Fedora Core 4 (not
>my favorite distro). Are there any python modules available for doing
>this? Any hints or suggestions would be welcome. 

    You can try this :
 
        http://videocapture.sourceforge.net/


From uval at rz.uni-karlsruhe.de  Mon Feb  6 13:18:01 2006
From: uval at rz.uni-karlsruhe.de (=?ISO-8859-1?Q?Sch=FCle_Daniel?=)
Date: Mon, 06 Feb 2006 19:18:01 +0100
Subject: read file problem
In-Reply-To: <1139239797.811569.253010@g43g2000cwa.googlegroups.com>
References: <1139239797.811569.253010@g43g2000cwa.googlegroups.com>
Message-ID: <ds7t96$fvg$1@news2.rz.uni-karlsruhe.de>


if you want the numbers you can combine it into one-liner

nums = file(r"C:\folder\myFile.txt").read().split(";")

the numbers are in string representation in the list
you can no do

nums = [float(num) for num in nums]

Regards, Daniel



From uche.ogbuji at gmail.com  Wed Feb  8 09:33:38 2006
From: uche.ogbuji at gmail.com (uche.ogbuji at gmail.com)
Date: 8 Feb 2006 06:33:38 -0800
Subject: only a simple xml reader <tag:id>value</tag:id>
In-Reply-To: <1139387993.478950.76410@g44g2000cwa.googlegroups.com>
References: <1139387993.478950.76410@g44g2000cwa.googlegroups.com>
Message-ID: <1139409218.480843.317570@g43g2000cwa.googlegroups.com>


martijn at gamecreators.nl wrote:
> H!,
>
> Is it possible to get a <tag:id>value</tag:id> value ?
>
> When I do this:
> -----------------------------------------------------
> theXML = """<?xml version="1.0"?>
>     <title>The Fascist Menace</title>
> """
> import xml.dom.minidom as dom
> doc = dom.parseString(theXML)
> print doc.getElementsByTagName('title')[0].toxml()
>
> I get : <title>The Fascist Menace</title> thats oke for me
> -----------------------------------------------------
>
> But the xmlfile I must read have other tags:
> theXML = """<?xml version="1.0"?>
>     <title:id>The Fascist Menace</title:id>
>     <title:name>bla la etc</title:name>
> """
>
> how to get that values ?
> I try things like:
> print doc.getElementsByTagName('title:id')[0].toxml() <--error

Addressing your general question, unfortunately you're a bit stuck.
Minidom is rather confused about whether or not it's a namespace aware
library.  Addressing your specific example, I strongly advise you not
to use documents that are not well-formed according to Namespaces 1.0.
Your second example is a well-formed XML 1.0 external parsed entity,
but not a well-formed XML 1.0 document entity, because it has multiple
elements at document level.  It's also not well-formed according to
XMLNS 1.0 unless you declare the "title" prefix.  You will not be able
to use a non XMLNS 1.0 document with most XML technologies, including
XSLT, WXS, RELAX NG, etc.

If you have indeed declared a namespace and are just giving us a very
bad example, use:

print doc.getElementsByTagNameNS(title_namespace, 'id')

--
Uche Ogbuji                               Fourthought, Inc.
http://uche.ogbuji.net                    http://fourthought.com
http://copia.ogbuji.net                   http://4Suite.org
Articles: http://uche.ogbuji.net/tech/publications/



From chrism at plope.com  Wed Feb  8 12:03:48 2006
From: chrism at plope.com (Chris McDonough)
Date: Wed, 08 Feb 2006 12:03:48 -0500
Subject: breadth first search
In-Reply-To: <43ea2271$1@127.0.0.1>
References: <43ea2271$1@127.0.0.1>
Message-ID: <43EA2474.7010109@plope.com>

News wrote:
> I am new in using Python
> 
> Anyone know how to implement breadth first search using Python?

Breadth-first search of what?  It depends what kind of tree you're 
searching, but here's a page with a few implementations:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/231503

   Can Python
> create list dynamically, I want to implement a program which will read data
> from a file and store each line into a list, is this possible?

L = []
[L.append(line) for line in (open('filename.txt')]

- C


From twic at urchin.earth.li  Thu Feb  2 18:55:43 2006
From: twic at urchin.earth.li (Tom Anderson)
Date: Thu, 2 Feb 2006 23:55:43 +0000
Subject: learning python, using string help
In-Reply-To: <1138909296.301962.16230@z14g2000cwz.googlegroups.com>
References: <1138906062.727850.177960@g14g2000cwa.googlegroups.com>  
	<fwsEf.24314$1%5.18129@tornado.texas.rr.com>
	<1138909296.301962.16230@z14g2000cwz.googlegroups.com>
Message-ID: <Pine.LNX.4.62.0602022221500.8737@urchin.earth.li>

On Thu, 2 Feb 2006, mikeisgreat at gmail.com wrote:

> Well, I did want to add some formatting for example

I getcha. This is really an HTML problem rather than a python problem, 
isn't it? What you need to do is output a table.

FWIW, here's how i'd do it (assuming you've got HP-UX ruptime, since 
that's the only one i can find example output for [1]):

http://urchin.earth.li/~twic/ruptime.py

You can use this as a library, a command-line tool, or a CGI script; it'll 
automagically detect which context it's in and do the right thing. It's 
built around the output from the HP-UX version of ruptime; let me know 
what the output from yours looks like (a few lines would do) and i'll show 
you how to change it.

The first key bit is a pair of regular expressions:

lineRe = re.compile(r"(\S+)\s+(\S+)\s+([\d+:]+)(?:,\s+(\d+) users,\s+load ([\d., ]+))?")
uptimeRe = re.compile(r"(?:(\d+)\+)?(\d*):(\d*)")

These rip the output from ruptime apart to produce a set of fields, which 
can then be massaged into useful data. Once that's done, there's a big 
splodge of code which prints out an HTML document containing a table 
displaying the information. It's probably neither the shortest nor the 
cleanest bit of code in the universe, but it does the job and should, i 
hope, be reasonably clear.

tom

[1] http://docs.hp.com/en/B2355-90743/ch06s02.html

-- 
Science Never Sleeps


From mark at mark-fink.de  Sat Feb 11 12:16:42 2006
From: mark at mark-fink.de (Mark Fink)
Date: 11 Feb 2006 09:16:42 -0800
Subject: Jython socket typecasting problems
Message-ID: <1139678202.221563.308700@f14g2000cwb.googlegroups.com>

I try to port a server application to Jython. At the moment I use
Jython21\Lib\socket.py
Currently I do face problems with casting the string "localhost" to the
desired value:
D:\AUT_TEST\workspace\JyFIT>jython fit/JyFitServer2.py localhost 1234
23
['fit/JyFitServer2.py', 'localhost', '1234', '23']
localhost
Traceback (innermost last):
  File "fit/JyFitServer2.py", line 146, in ?
  File "fit/JyFitServer2.py", line 31, in run
  File "fit/JyFitServer2.py", line 96, in establishConnection
  File "D:\AUT_TEST\Jython21\Lib\socket.py", line 135, in connect
TypeError: java.net.Socket(): 1st arg can't be coerced to
java.net.InetAddress or String

The cast to Integer for the port does not work either:

D:\AUT_TEST\workspace\JyFIT>jython fit/JyFitServer2.py "" 1234 23
['fit/JyFitServer2.py', '', '1234', '23']

Traceback (innermost last):
  File "fit/JyFitServer2.py", line 146, in ?
  File "fit/JyFitServer2.py", line 31, in run
  File "fit/JyFitServer2.py", line 96, in establishConnection
  File "D:\AUT_TEST\Jython21\Lib\socket.py", line 135, in connect
TypeError: java.net.Socket(): 2nd arg can't be coerced to int

This is the code section of my server class (I cut this from a Python
example):
    def establishConnection(self):
        self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.socket.connect((self.host, self.port))
Do I have to use explicit typecasting? How can this be achieved?



From claird at lairds.us  Fri Feb 17 13:08:02 2006
From: claird at lairds.us (Cameron Laird)
Date: Fri, 17 Feb 2006 18:08:02 GMT
Subject: Print a PDF transparently
References: <1140184955.674138.275010@o13g2000cwo.googlegroups.com>
	<11vbpu58sll1b4f@corp.supernews.com>
	<1140190758.951694.231890@f14g2000cwb.googlegroups.com>
	<45mbasF7eburU1@uni-berlin.de>
Message-ID: <ogdhc3-816.ln1@lairds.us>

In article <45mbasF7eburU1 at uni-berlin.de>,
Diez B. Roggisch <deets at nospam.web.de> wrote:
>> Based on all this, I have been investigating about postscript files. I
>> realize that printers do handle this language, so I think if I have a
>> .ps file and send it directly to the printer, it should do the job,
>> right? (this is certainly a question) If the answer is True, no matter
>> in what platform I am, if I send the same .ps to the printer, it should
>> print the same result.
>
>No. There are PostScript-Printers out there - but your off-the-shelf InkJet
>isn't, and that's the reason why there usually has to be some sort of
>driver in-between. Which is either GS or, in case of PDF, the acrobat-* or
>any other PDF-printer-emulator. 
>
>maybe you can go down the rocky road of automation here, remote-controlling
>acrobat reader. But I doubt that it wouldn't at least flash up with its
>window for as long as the printing lasts.
>
>Diez

Right.  It's possible, barely, to achieve the desired result
with Ghostscript, but it's going to take considerable care in
installation and configuration.  We do this sort of thing, but
only on hosts we control; the thought of full-blown "producti-
zation" (let alone the licensing) intimidates me.


From xavier.morel at masklinn.net  Sun Feb  5 12:22:41 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Sun, 05 Feb 2006 18:22:41 +0100
Subject: Learning Python
In-Reply-To: <1139158511.281394.126970@g47g2000cwa.googlegroups.com>
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
	<1139156577.897100.69140@g43g2000cwa.googlegroups.com>
	<mailman.1440.1139157631.27775.python-list@python.org>
	<1139158511.281394.126970@g47g2000cwa.googlegroups.com>
Message-ID: <ds5c4d$cej$3@aphrodite.grec.isp.9tel.net>

Byte wrote:
> Assumption. Im also new to programing, so could do something stupid
> like think a Windows path is a command/input/etc. (really, ive done
> things like that before.)
> 
Don't assume anything when you have no reason to, and especially don't 
assume that a cross-platform programming language behaves differently 
from a platform to another, especially on built-in basic functions

> Now, im running this on a terminal, but am acctually writing my scripts
> in a text editor. How can I get a script to do a sum with the editor?
> e.g. it asks for a sum, then does it etc.
> 
parse the expression, extract the operands and the operation, apply the 
operation to the operands (are you trying to code a calculator?)


From larry.bates at websafe.com  Thu Feb  9 18:53:05 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Thu, 09 Feb 2006 17:53:05 -0600
Subject: Determining an operating system's default browser
In-Reply-To: <mailman.1690.1139528346.27775.python-list@python.org>
References: <mailman.1690.1139528346.27775.python-list@python.org>
Message-ID: <43EBD5E1.1040501@websafe.com>

You don't have to determine it.  Just os.startfile('page1.html')
and let the OS figure it out.

-Larry Bates


John McMonagle wrote:
> Is there a python module which can determine an operating system's
> default web browser application.
> 
> I would like to use it in the following context:  I have a GUI
> application where all the documentation is written as html pages.  I
> wish to have these html help pages open in the default browser when
> selected from the application's Help menu
> 
> If python can determine the path to the default browser, I can then just
> spawn it.
> 
> Regards,
> 
> John McMonagle
> 
> 
> 
> 


From aleaxit at yahoo.com  Fri Feb  3 23:28:40 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Fri, 3 Feb 2006 20:28:40 -0800
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<donn-C3B8DF.14535302022006@gnus01.u.washington.edu>
	<1138926741.052843.169270@z14g2000cwz.googlegroups.com>
	<donn-AC8404.17325802022006@gnus01.u.washington.edu>
	<1138965780.698016.95590@o13g2000cwo.googlegroups.com>
	<donn-442117.10474803022006@gnus01.u.washington.edu>
	<1139010489.553408.250770@g44g2000cwa.googlegroups.com>
Message-ID: <1ha7a32.zgkc171pbhls6N%aleaxit@yahoo.com>

<n.estner at gmx.de> wrote:
   ...
> your idea. Could you summarize how exactly "f(x,y=z)" should be
> resolved, i.e. where it should look for "f"?

Lexically: local scope, outer functions outwards, globals, builtins.


Alex


From http  Mon Feb 27 05:42:51 2006
From: http (Paul Rubin)
Date: 27 Feb 2006 02:42:51 -0800
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>
	<4402AB7F.7070804@REMOVEMEcyber.com.au>
	<7xzmkdxkce.fsf@ruckus.brouhaha.com>
	<mailman.2467.1141034300.27775.python-list@python.org>
Message-ID: <7xoe0tozf8.fsf@ruckus.brouhaha.com>

Felipe Almeida Lessa <felipe.lessa at gmail.com> writes:
> >     print_members('shorter:', months_shorter_than_february)
> >     print_members('longer:', months_longer_than_february)
> 
> IMHO, you should be using sets, not enums. Something like:

If enums aren't supposed to work in that construction then the PEP
shouldn't specify that they work that way.


From larry.bates at websafe.com  Tue Feb 21 12:55:36 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 21 Feb 2006 11:55:36 -0600
Subject: Little tool - but very big size... :-(
In-Reply-To: <dteo9g$3vp$1@news.lysator.liu.se>
References: <mailman.2211.1140513270.27775.python-list@python.org>
	<dteo9g$3vp$1@news.lysator.liu.se>
Message-ID: <43FB5418.9000600@websafe.com>

Since the target is Windows only, consider using win32gui
(part of Mark Hammonds win32 extensions) calls to use
native Windows controls.  That way you can eliminate
wxWindows altogether.  If all you need is a file dialog,
it isn't very difficult.

-Larry Bates


Mikael Olofsson wrote:
> Durumdara wrote:
>> But it have very big size: 11 MB... :-(
>>
>> The dist directory:
>> [snip relatively small files]
>> 2005.09.28.  12:41         1 867 776 python24.dll
>> [snip relatively small files]
>> 2006.01.10.  19:09         4 943 872 wxmsw26uh_vc.dll
>> [snip relatively small files]
>>              20 file        11 485 758 byte
>>
>> I need to have more compressed result. Can I compress dll-s, pyd-s with
>> Py2Exe ?
>> Can I decrease the total size with something ?
> 
> I've snipped out the relatively small files above. Yes, true, some of
> them consume about 0.5MB each.
> 
> It seems to me that your choice of GUI framework is a major cost here. I
> have never used wxpython. Instead my GUIs are based on tkinter. What I
> typically end up with is roughly 7MB. My last example ended up in 7.5MB.
> Zipping the whole thing reduces that to 2.6MB. Is it completly out of
> the question to have a compressed version of the tool on your memory
> stick, and to decompress it on the examined computer before actually
> running the tool?
> 
> /MiO


From bronger at physik.rwth-aachen.de  Fri Feb 24 03:13:06 2006
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 24 Feb 2006 09:13:06 +0100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com> <43fbc788@usenet01.boi.hp.com>
	<87u0ar3gba.fsf@wilson.homeunix.com>
	<pan.2006.02.22.11.35.14.90948@REMOVETHIScyber.com.au>
	<87bqwzjys9.fsf@wilson.homeunix.com> <43fe7592@usenet01.boi.hp.com>
Message-ID: <87zmkh899p.fsf@wilson.homeunix.com>

Hall?chen!

Peter Mayne <Peter.Mayne at hp.com> writes:

> Torsten Bronger wrote:
>
>>>>> Another example: is Java the bytecode, which is compiled from
>>>>> Java the language, interpreted or not? Even when the HotSpot
>>>>> JIT cuts in?
>>>>
>>>> It is partly interpreted and partly compiled.  That's why it's
>>>> faster than Python.
>>>
>>> But Python is partly interpreted and partly compiled too
>>
>> It's byte-compiled for a VM, that's not the same, and you know
>> it.
>
> Do you mean that Python is byte-compiled for a VM, and not Java,
> or vice-versa?

I mean "Python is byte-compiled for a VM".

>> I agree that the distinction between interpreted and compiled
>> languages is not as clear as between positiv and negative
>> numbers, however, neither anybody has claimed that so far, nor it
>> is necessary.  It must be *practical*, i.e. a useful rule of
>> thumb for decision making.  If you really know all implications
>> (pros and cons) of interpreted languages, it's are very useful
>> rule in my opinion.
>
> So what kind of practical decisions are you trying to make?

Which language should I use for my project.

> What kind of implications are useful to you?

Speed, ease of programming, necessity to learn/use a secondary
language, issues with distributing, portability.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus            ICQ 264-296-646


From dausha at gmail.com  Fri Feb 24 15:04:12 2006
From: dausha at gmail.com (Ben Wilson)
Date: 24 Feb 2006 12:04:12 -0800
Subject: Trolling for New Web Host . . .
Message-ID: <1140811452.070955.105180@e56g2000cwe.googlegroups.com>

I've had the same web host (imhosted.com) for the past three years, and
have had decent service. However, I'm also trying to learn Python the
hard way--by doing. So, I figured I'd write a few Python CGIs
(non-Zope). Unfortunately, my web host does not have mod_python. They
only way I can run a python script is by using the .cgi extension. I'm
not sure if I want to stick with my host and just call my apps
index.cgi, or if I should move to a new server. If I were to move to a
new server, which would you recomend, and why?

Regards,
Ben Wilson



From dickinsm at gmail.com  Sat Feb 11 11:01:56 2006
From: dickinsm at gmail.com (dickinsm at gmail.com)
Date: 11 Feb 2006 08:01:56 -0800
Subject: Shortest prime number program
In-Reply-To: <1139652226.869102.310180@g14g2000cwa.googlegroups.com>
References: <1139652226.869102.310180@g14g2000cwa.googlegroups.com>
Message-ID: <1139673716.241461.84110@g47g2000cwa.googlegroups.com>


swisscheese wrote:
>
> r=range(2,99)
> m=[x*y for x in r for y in r]
> [x for x in r if not x in m]

How about:

[2]+[x for x in range(1,99) if 2**x%x==2]

Mark



From Matt  Wed Feb 15 21:49:28 2006
From: Matt (Matt)
Date: Thu, 16 Feb 2006 02:49:28 GMT
Subject: Win32_Process.Create -- not starting process
Message-ID: <yEncExpress_Rulz!_www.techsono.com_3222902968@firstva.com>

"abcd" <codecraig at gmail.com> wrote:

>.....however the python script that is called from the batch script

One thing I have learned about launching programs from batch files like this 
is that if the launched program tries to prompt the user for imput at the 
command line, everthing goes haywire since it has no shell to communicate 
with. It may crash, go into a loop, etc.

Good luck,
Matt





From lucaberto at libero.it  Wed Feb 22 04:18:21 2006
From: lucaberto at libero.it (luca72)
Date: 22 Feb 2006 01:18:21 -0800
Subject: Pyserial never read
In-Reply-To: <slrndvn1ad.he1.nick@irishsea.home.craig-wood.com>
References: <1140105936.408387.88130@z14g2000cwz.googlegroups.com>
	<1140219414.143448.234450@z14g2000cwz.googlegroups.com>
	<1140302110.028540.176210@g43g2000cwa.googlegroups.com>
	<slrndvm0sr.6k1.nick@irishsea.home.craig-wood.com>
	<mailman.2241.1140536285.27775.python-list@python.org>
	<slrndvn1ad.he1.nick@irishsea.home.craig-wood.com>
Message-ID: <1140599901.082142.262540@f14g2000cwb.googlegroups.com>


Thanks to all for the help,

here you find the code, pls note if i use handshaking = 1 the
application don't start.
in the delphi configuratio of com port if i use or not handshaking the
application work.
Best Regards at all

Luca

import serial
        import win32file
        port = 2
        baudrate = 38400
        bytesize =serial.EIGHTBITS
        parity =serial.PARITY_ODD
        stopbits =serial.STOPBITS_TWO
        timeout = 1
        ser = serial.Serial(2, baudrate=38400, bytesize=8,
parity=serial.PARITY_ODD, stopbits=2, timeout=3)
        ct = ''
        ch = ''
        a = self.textCtrl1.GetValue()
        ind = 0
        ind1 = 2
        lunghezza = len(a)
        while ind < lunghezza :
            b = a[ind:ind1]
            b = int(b,16)
            b = ~b
            c = ''.join([str((b >> Digit) & 1) for Digit in range(7,
-1, -1)])
            c1 = c[0:4]
            c2 = c[4:]
            c1 = c1[3:] + c1[2:3] + c1[1:2] + c1[0:1]
            c2 = c2[3:] + c2[2:3] + c2[1:2] + c2[0:1]
            c1 = hex(int(c1,2))
            c2 = hex(int(c2,2))
            c1 = c1[2:]
            c2 = c2[2:]
            c = c2+c1
            ct = ct + c
            ind = ind + 2
            ind1 = ind1 + 2
            c = int(c,16)
            c = chr(c)
            ch = ch + c


        ser.write(ch)

        elf.textCtrl2.SetValue(ct)
        ser.readline()



Pls.Note i hove also try with read(number of byte ) with inWaiting(),
flush  etc........


But no result.

Thanks Luca



From fuzzyman at gmail.com  Fri Feb 24 18:17:54 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 24 Feb 2006 15:17:54 -0800
Subject: Multiple versions of Python / PythonWin on the same machine?
In-Reply-To: <1140818895.436107.261820@p10g2000cwp.googlegroups.com>
References: <1140818895.436107.261820@p10g2000cwp.googlegroups.com>
Message-ID: <1140823074.111991.267690@e56g2000cwe.googlegroups.com>


dananrg at yahoo.com wrote:
> I have Python 2.1 / PythonWin 2.1 installed on my machine because I
> need it for use with ESRI's ArcGIS Desktop software, but I want to play
> with a more recent version of Python.
>
> Is it safe to install more than one version of Python / PythonWin on
> the same machine? I don't want the latest release to wipe out the old
> one.

An alternative technique is to use Movable Python which doesn't need to
be installed. This gives you a portable programming environment for
Python 2.4 (or 2.3 or 2.2) which  you can carry from machine to machine
on a USB key.

    http://www.voidspace.org.uk/python/movpy/

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml



From duncanm255 at hotmail.com  Fri Feb 10 21:40:30 2006
From: duncanm255 at hotmail.com (D)
Date: 10 Feb 2006 18:40:30 -0800
Subject: Socket Programming - Question
In-Reply-To: <1139620100.958169.235490@g43g2000cwa.googlegroups.com>
References: <1139616664.208516.254900@f14g2000cwb.googlegroups.com>
	<1139620100.958169.235490@g43g2000cwa.googlegroups.com>
Message-ID: <1139625630.231315.263770@g43g2000cwa.googlegroups.com>

Thanks!  Now, I'm a bit confused as to exactly how it works - will it
display the output of what it executes on the target system?  I would
like to create a window in Tktinker to where a user can select options
(such as run scan on remote system) - it would then run the
command-line based scan and return the output.  Does this sound like
something it would do?  Thanks again :)



From siv.hansen at gmail.com  Mon Feb 27 17:59:37 2006
From: siv.hansen at gmail.com (Cruella DeVille)
Date: 27 Feb 2006 14:59:37 -0800
Subject: type = "instance" instead of "dict"
In-Reply-To: <440370ce$1_2@newspeer2.tds.net>
References: <1141069989.763239.191140@u72g2000cwu.googlegroups.com>
	<44035966$1_2@newspeer2.tds.net>
	<1141072746.685948.251040@j33g2000cwa.googlegroups.com>
	<440370ce$1_2@newspeer2.tds.net>
Message-ID: <1141081177.003471.139820@t39g2000cwt.googlegroups.com>

I created a class Dict (not dict), but since it only complicates things
for me I implemented my program without it.

when I wrote myDictionary = dictionary.__dict__.iteritems() it worked
better...
what does the __dict__ mean?



From gtcopeland at gmail.com  Tue Feb  7 13:14:25 2006
From: gtcopeland at gmail.com (Greg Copeland)
Date: 7 Feb 2006 10:14:25 -0800
Subject: Dual Core outlook
In-Reply-To: <1139335428.970958.170320@o13g2000cwo.googlegroups.com>
References: <1139329268.695421.191340@g47g2000cwa.googlegroups.com>
	<dsajpk$c26$1@aphrodite.grec.isp.9tel.net>
	<1139335428.970958.170320@o13g2000cwo.googlegroups.com>
Message-ID: <1139336065.317780.217870@o13g2000cwo.googlegroups.com>

The short answer is, "maybe".  Python will be CPU bound but not I/O
bound.  This means you can have multiple threads concurrently
performing I/O.  On the other hand, if you have two threads which are
CPU bound, only one will run at a time.

Having said that, there are plenty of ready work arounds.  One is to
make an extension module which executes your CPU bound tasks while
releasing the GIL.  The other is to break your script into a
multiprocess model rather than a multithreaded module; using IPC as
needed.



From tuvas21 at gmail.com  Tue Feb  7 15:21:51 2006
From: tuvas21 at gmail.com (Tuvas)
Date: 7 Feb 2006 12:21:51 -0800
Subject: Thread imbalance
In-Reply-To: <HVMFf.52292$PL5.13025@newssvr11.news.prodigy.com>
References: <1138912272.382474.13170@g44g2000cwa.googlegroups.com>
	<ds3d35$mo6$2@bagan.srce.hr>
	<mailman.1427.1139097680.27775.python-list@python.org>
	<ds55tb$n00$1@bagan.srce.hr>
	<lukcu19iaqamsm5ohs618ckp169csrq8ql@4ax.com>
	<ds698k$n5l$2@bagan.srce.hr>
	<1139197849.994966.150810@z14g2000cwz.googlegroups.com>
	<oxLFf.30420$H71.26518@newssvr13.news.prodigy.com>
	<1139248342.222672.304350@o13g2000cwo.googlegroups.com>
	<HVMFf.52292$PL5.13025@newssvr11.news.prodigy.com>
Message-ID: <1139343711.192349.194310@z14g2000cwz.googlegroups.com>

Adding that bit of code seems to have fixed the problem, thanks alot!



From gregpinero at gmail.com  Wed Feb  1 11:34:21 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Wed, 1 Feb 2006 11:34:21 -0500
Subject: urllib2 - My POST Request just isn't working right
In-Reply-To: <312cfe2b0602010833j29f59563i90e62145e6829d33@mail.gmail.com>
References: <312cfe2b0602010753uc363a85wb3f87cf2677993a2@mail.gmail.com>
	<mailman.1317.1138810288.27775.python-list@python.org>
	<1138810726.547315.82890@f14g2000cwb.googlegroups.com>
	<312cfe2b0602010833j29f59563i90e62145e6829d33@mail.gmail.com>
Message-ID: <312cfe2b0602010834i5abdd0e5x2b7659658685b8ab@mail.gmail.com>

Correction:
-------------------------------------------------------------------------
POST /GatewayDC HTTP/1.0
Referer: YourCompanyNameGoesHere
Host: SSLserver.fedex.com
Accept: image/gif, image/jpeg, image/pjpeg, text/plain, text/html, */*
Content-Type: image/gif
Content-length: %d

Your FedEx Transaction
-------------------------------------------------------------------------


From fredrik at pythonware.com  Tue Feb 21 10:42:24 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 21 Feb 2006 16:42:24 +0100
Subject: Video Capture modules in linux
References: <1140536025.234765.309040@z14g2000cwz.googlegroups.com>
Message-ID: <dtfcd0$mem$1@sea.gmane.org>

sudharsh at gmail.com wrote:

> i need this video capture modules which i can use in linux, u know the
> similar one used in windows, Now Windows is not my type and it would be
> really helpful if someone helps me out...i tried libfg but its not
> useful in my case (BTW its a great library)...

given how well libfg matches your requirements, it might help to know why
it's not useful in your case.

</F> 





From fuzzyman at gmail.com  Wed Feb  8 07:10:32 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 8 Feb 2006 04:10:32 -0800
Subject: Detecting line endings
In-Reply-To: <1139398460.602597.54340@g14g2000cwa.googlegroups.com>
References: <1139236514.022464.319970@g14g2000cwa.googlegroups.com>
	<1hacujo.1p81efw1ej38ioN%aleaxit@yahoo.com>
	<1139304588.446722.255240@o13g2000cwo.googlegroups.com>
	<1hadpni.1ne1raq17jjbyaN%aleaxit@yahoo.com>
	<1139398460.602597.54340@g14g2000cwa.googlegroups.com>
Message-ID: <1139400632.465858.232710@f14g2000cwb.googlegroups.com>


Fuzzyman wrote:
> Alex Martelli wrote:
> > Fuzzyman <fuzzyman at gmail.com> wrote:
> >    ...
> > > > Open the file with 'rU' mode, and check the file object's newline
> > > > attribute.
> > >
>
> Just to confirm, for a UTF16 encoded file, the newlines attribute is
> ``None``.
>

Hmmm... having read the documentation, the newlines attribute remains
None until some newlines are encountered. :oops:

I don't think it's technique is any better than mine though. ;-)

Fuzzy
http://www.voidspace.org.uk/python/index.shtml


> All the best,
> 
> Fuzzyman
> http://www.voidspace.org.uk/python/index.shtml



From hgk at et.uni-magdeburg.de  Tue Feb  7 05:58:32 2006
From: hgk at et.uni-magdeburg.de (Hans Georg Krauthaeuser)
Date: Tue, 07 Feb 2006 11:58:32 +0100
Subject: RPy / R
In-Reply-To: <kiWFf.507$U35.88@fe02.lga>
References: <kiWFf.507$U35.88@fe02.lga>
Message-ID: <ds9ugo$o5d$1@fuerst.cs.uni-magdeburg.de>

jason schrieb:
> Hello:
> 
> I installed the following:
> 
> python-2.4.2.msi
> pywin32-207.win32-py2.4.exe
> R-2.2.1-win32.exe
> rpy-0.4.6-R-2.0.0-to-2.2.1-py24.win32.exe
> 
> on a Windows XP (SP2) box.
> 
> When I try to run the following (source: 
> http://rpy.sourceforge.net/plotting-with-RPy.html) in IDLE
> 
>>>>from rpy import *
>>>>x = range(0, 10)
>>>>y = [ 2*i for i in x ]
>>>>r.plot_default(x, y)

Jason,

the example runs here without problems.

My configuration:

Python 2.3.5 (#2, Aug 30 2005, 15:50:26)
[GCC 4.0.2 20050821 (prerelease) (Debian 4.0.1-6)] on linux2
Type "copyright", "credits" or "license()" for more information.

>>> r.version
{'status': '', 'major': '2', 'language': 'R', 'os': 'linux-gnu', 'svn
rev': '36812', 'system': 'i486, linux-gnu', 'month': '12', 'platform':
'i486-pc-linux-gnu', 'year': '2005', 'arch': 'i486', 'day': '20',
'minor': '2.1'}

Seems to be a problem with your installation...

Hans Georg


From python.list at tim.thechases.com  Wed Feb  8 17:27:30 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Wed, 08 Feb 2006 16:27:30 -0600
Subject: What editor shall I use?
In-Reply-To: <1139436717.623712.159780@o13g2000cwo.googlegroups.com>
References: <1139410110.389122.215400@z14g2000cwz.googlegroups.com>	<dsd0s6$1sps$1@boco.fee.vutbr.cz>
	<1139436717.623712.159780@o13g2000cwo.googlegroups.com>
Message-ID: <43EA7052.40309@tim.thechases.com>

> I myself have just begun using vim. Does anyone have any
> tips/convenient tweaks for python programming with it?

For python programming several settings can make life far less 
painful (assuming you like 4-spaces-per-tab) :

	set ai ts=4 sw=4 et

or

	set ai ts=4 sw=4 noet

(depending on whether you prefer tabs or spaces...just be consistent)

Setting 'ai' puts vim in "autoindent" mode.

Setting 'ts' sets how many spaces are considered an a tab

Setting 'sw' sets how many spaces-worth a shift does

Setting 'et' sets the 'expandtab' property.  When set, it expands 
typed tabs as spaces.  When unset ('noexpandtab'), tabs aren't 
touched.

You might also search the "scripts" or "tips" section of 
www.vim.org for "python" and see what sorts of scripts, tips, and 
plugins are available to supercharge your python-coding in vim.

http://www.vim.org/search.php

Additionally, the vim mailing list is one of the best I've been 
on--regularly on-topic, with friendly folk, accurate answers, 
fairly fast replies, and some great minds to tap.

http://www.vim.org/community.php

-tkc








From cjw at sympatico.ca  Tue Feb 21 19:47:51 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Tue, 21 Feb 2006 19:47:51 -0500
Subject: odt -> pdf
In-Reply-To: <mailman.2222.1140519805.27775.python-list@python.org>
References: <mailman.2222.1140519805.27775.python-list@python.org>
Message-ID: <OwOKf.1845$XZ3.160163@news20.bellglobal.com>

Katja Suess wrote:
> Hi
> Cause Google didn't find the Info I was trying to find her my post.
> Is PyUNO still _the_ Tool to create PDFs out of OpenOffice docs (odt, 
> not swx) ?
> Do other tools exist?
> Do you prefer generatingp PDFs using the XML-Strukture of odt files?
> Regards,
> Katja
> 
OpenOffice.org 2.0 gives you an Export to pdf capability.

Colin W.


From peterm at resmed.com.au  Thu Feb  9 19:48:27 2006
From: peterm at resmed.com.au (Peter Milliken)
Date: Fri, 10 Feb 2006 11:48:27 +1100
Subject: What editor shall I use?
References: <1139410110.389122.215400@z14g2000cwz.googlegroups.com>
Message-ID: <xpRGf.39$NN.671@snnrp1.syd4.maint.ops.aspac.uu.net>

You might want to have a look at the Python Wiki - it has lots of good
information. One topic of interest is on what editors you can use with
Python http://wiki.python.org/moin/PythonEditors

Otherwise asking a question like "what editor should I use" will invariably
generate a response based on what each individual is "happy" with - not
necessarily the best editor from your perspective at all! :-) For example, I
use Emacs - have done so for 15+ years now. AFAIK it is an excellent editing
platform for Python development - but then it is an excellent platform for
any language development I have ever used :-).

Goodluck in your search,
Peter

"Lad" <python at hope.cz> wrote in message
news:1139410110.389122.215400 at z14g2000cwz.googlegroups.com...
> What editor shall I use if my Python script must contain utf-8
> characters?
> I use XP
> Thank you for reply
> l.b.
>




From alanmk at hotmail.com  Wed Feb  8 10:55:19 2006
From: alanmk at hotmail.com (Alan Kennedy)
Date: 8 Feb 2006 07:55:19 -0800
Subject: Jython inherit from Java class
References: <1139344211.725580.263660@g47g2000cwa.googlegroups.com>
Message-ID: <1139414119.778364.166300@f14g2000cwb.googlegroups.com>

[Mark Fink]
> I wrote a Jython class that inherits from a Java class and (thats the
> plan) overrides one method. Everything should stay the same.
>
> If I run this nothing happens whereas if I run the Java class it says:
> usage: java fit.FitServer [-v] host port socketTicket
>         -v      verbose
>
> I think this is because I do not understand the jython mechanism for
> inheritance (yet).

1. Are you running jythonc?

If yes, I think your class and file should have the same name, i.e.
Class FitServer should be in a file called "FitServer.py". I recommend
calling your class something different from the base class, e.g.
MyJythonFitServer, to prevent namespace clashes.

2. If your main function in jython? If yes, please post the code so we
can see how you're instantiating your objects?

3. How are you running this? I.e. show us a command line session which
uses your class.

> JyFitServer.py:
> ===========

> class FitServer(fit.FitServer):
>     # call constructor of superclass
>     def __init__(self, host, port, verbose):
>         FitServer.__init__(self, host, port, verbose)
          ^^^^^^^^^
Shouldn't this be:

>         fit.FitServer.__init__(self, host, port, verbose)

I'm not sure the latter is cause of your problems, but it might be.

HTH,

--
alan kennedy
------------------------------------------------------
email alan:              http://xhaus.com/contact/alan



From reply.in.the.newsgroup at my.address.is.invalid  Sun Feb 12 14:55:04 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Sun, 12 Feb 2006 20:55:04 +0100
Subject: Tracking down memory leaks?
References: <1139749861.949765.282310@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.14.27.02.369270@REMOVETHIScyber.com.au>
	<1139773066.603128.255400@g44g2000cwa.googlegroups.com>
Message-ID: <1g4vu1p3anhdcomi9b8fmrrsf7petlrcb0@4ax.com>

malv:
>Is there any way for making Python return memory no longer needed to
>the OS? Cases may arise where you indeed need a big memory block
>temporarily without being able to split it up into smaller chunks.

That's not really necessary. On any decent OS it's just unused address
space, that doesn't consume any physical memory.

And when your process runs out of address space, you should program more
carefully :-)

-- 
Ren? Pijlman


From http  Wed Feb  1 20:52:03 2006
From: http (Paul Rubin)
Date: 01 Feb 2006 17:52:03 -0800
Subject: cgi - secure sessions
References: <1138842390.012855.107610@g44g2000cwa.googlegroups.com>
	<7x8xsuczxz.fsf@ruckus.brouhaha.com>
	<1138844380.094365.223840@g44g2000cwa.googlegroups.com>
Message-ID: <7xzmlabk8s.fsf@ruckus.brouhaha.com>

"GazaM" <infini.g at gmail.com> writes:
> there will display a login form. Now, the big showstopper here is that,
> because session cookies are stored in http headers sent by the client
> (afaik) the cgi script can't get any, because the http headers are
> passed onto the html file and any cgi scripts inside don't get
> anything... is there a workaround possible? 

Usually the httpd (i.e. web server) saves the cookie data as
environment variables that the cgi can see.  What httpd are you using?
"Server side includes" used to mean something specific, a very old
dynamic html scheme that nobody uses much any more.  I'm presuming
your cgi is written in Python.  Have you looked at the cgi module docs?


From larry.bates at websafe.com  Sat Feb  4 12:15:56 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Sat, 04 Feb 2006 11:15:56 -0600
Subject: Extract contents of html cells
In-Reply-To: <ds2l58$ei8$1@volcano1.grnet.gr>
References: <ds2l58$ei8$1@volcano1.grnet.gr>
Message-ID: <43E4E14C.5050102@websafe.com>

Robot wrote:
> Dear all,
> I need to create a script which will extract the contents of 2 cells of
> an html that contains a specified number of cells.Then I need to put
> that contents in another cells of my own html page.How can i do that?Any
> samples, tutorials, advice?
> 

You should take a look at for the screen-scraping part:

http://www.crummy.com/software/BeautifulSoup/

To put them in your html page all you need to do is to have some
placeholders in your html and use python to replace the placeholders
with the values you get from the other screen.

-Larry Bates


From harry.g.george at boeing.com  Fri Feb  3 10:09:27 2006
From: harry.g.george at boeing.com (Harry George)
Date: Fri, 3 Feb 2006 15:09:27 GMT
Subject: Fromatting an xml file
References: <1138874224.989909.81620@z14g2000cwz.googlegroups.com>
Message-ID: <xqxwtgcjx7c.fsf@cola2.ca.boeing.com>

"sir_alex" <chimaera29 at libero.it> writes:

> Hi! I have a little problem writing xml files formatted in a way like
> the following:
> 
> <rootnode>
>          <node>bla</node>
>          <node>bla</node>
> </rootnode>
> 
> Every new node element should have a tabulation before it, but when I
> use xml.dom.minidom I use writexml, which considers as a new node also
> the text (in my little example, "bla" phrases), so the best result I
> achieved has been the following
> 
> <rootnode>
>         <node>
>                  bla
>         </node>
> </rootnode>
> 
> but I don't want the text to be written on newlines... is there a good
> solution? Thanks!
> 

Based on recommendations from this newsgroup, I write XML directly,
instead of going through DOM.  That in turn requires a mechanism for
tabbed indents, so I wrote tabbedwriter:

http://www.seanet.com/~hgg9140/comp/index.html
http://www.seanet.com/~hgg9140/comp/tabbedwriter/doc/tabbedwriter.help


-- 
harry.g.george at boeing.com 6-6M21 BCA CompArch Design Engineering
Phone: (425) 294-4718


From claudio.grondi at freenet.de  Wed Feb 15 10:52:30 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Wed, 15 Feb 2006 16:52:30 +0100
Subject: file names longer than MAX_PATH under Windows 2003
In-Reply-To: <dsvi28$8u1$1@news.rtcomm.ru>
References: <mailman.1900.1139925147.27775.python-list@python.org>
	<dsvi28$8u1$1@news.rtcomm.ru>
Message-ID: <dsvims$gps$1@newsreader3.netcologne.de>

Sergey wrote:
> "Tim Golden" <tim.golden at viacom-outdoor.co.uk> wrote in message news:mailman.1900.1139925147.27775.python-list at python.org...
> [Sergey]
> 
> 
>>I see from another post that CreateFile cannot open your file.
>>That puts it further away from Python, although it doesn't
>>explain how some other program can see the files. Can you use
>>os.startfile (or its equivalent win32api.ShellExecute from
>>pywin32)? Perhaps if you were to chdir to the directory in
>>question you'd be able to access the file.
> 
> 
> I found error in filename (extra backslash) and now I can open file.
> But another trouble appeared: I cannot listdir so long name.
> I examined posixmodule.c... There are wcsncpy with hard limit of MAX_PATH*2+5.
> So... RIP, my module...
> 
> 
I don't know if and how it apply and can be of any help here, but in my 
C programs in the very past after switching from DOS to Windows long 
names a following trick solved often my problems with too long names:
   step 1:  setting the current directory to the beginning part of the 
name with a length which can be passed as a function parameter
   step 2:  usage of the remaining part of name as name passed as 
parameter to the file accessing function (relative to current directory)

Claudio


From userprogoogle-139 at yahoo.co.uk  Wed Feb  8 09:07:01 2006
From: userprogoogle-139 at yahoo.co.uk (rodmc)
Date: 8 Feb 2006 06:07:01 -0800
Subject: Python and Flash
References: <1139230361.675896.241920@z14g2000cwz.googlegroups.com>
	<1139235297.903689.244030@z14g2000cwz.googlegroups.com>
Message-ID: <1139407620.948877.5820@g14g2000cwa.googlegroups.com>

Thanks for the help so far.

There are two Python applications involved, one runs on a remote PC
(server) and another on the users PC (client).

The server at present merely receives and sends out messages via an
instant messaging platform. Based on the information it receives via
the IM platform it then updates the Flash application. I guess it could
do it in a number of ways, one method being to send messages to the
Flash application to update the display, or another to update the
visualisation on the server then get the web browser  (on the client
PC) to reload it.

Thanks,

rod



From deets at nospam.web.de  Thu Feb 16 08:54:57 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 16 Feb 2006 14:54:57 +0100
Subject: Visual Report Editor
References: <1140094721.295791.319900@g47g2000cwa.googlegroups.com>
Message-ID: <45jejeF71lr4U1@uni-berlin.de>

Pawel wrote:

> Hello,
> I plan to make Visual Reporting Editior, a new product for
> corporate-class systems. Data will be in XML and in my application,
> designer should be able to make fascinating templates of reports. I
> will use Python and MSVS 2005 Pro. My question is, which libaries will
> be useful in my job. I plan to buy Qt and make visual layer of
> application using Qt. I'm making businessplan soI have to decide which
> tool will be useful. Is Qt best choice, maybe I should buy something
> different?

If you do have the money, Qt is what you want to get. I've been
cross-OS-developing with it for Win, Linux and MacOs and it never let me
down. Even if you don't need cross-platform, the toolchain alone together
with the really good design are worth it.

Currently the move to Qt4 in the PyQt community is done, you might consider
waiting until that is reasonably stable or go for the early snapshots and
then buy stuff when its released.

Diez


From m.wanstall at gmail.com  Sun Feb 19 02:51:42 2006
From: m.wanstall at gmail.com (m.wanstall at gmail.com)
Date: 18 Feb 2006 23:51:42 -0800
Subject: os.mkdir simple help
Message-ID: <1140335502.110014.35870@g47g2000cwa.googlegroups.com>

Hi there,

I'm totally new to Python and was wondering why I was getting an error
for this. I'm just trying to create a folder based on user input:

import os

def setupProject(project):
    os.mkdir(project)
    os.chdir(project)

test = input("Please enter project name: ")
setupProject(test)

If I enter "roger" as my input I get : NameError: name 'roger' is not
defined

I know it's incredibly simple but help would be much appreciated!
Thanks in advance!



From vania.smirk at gmail.com  Mon Feb 13 20:21:58 2006
From: vania.smirk at gmail.com (VSmirk)
Date: 13 Feb 2006 17:21:58 -0800
Subject: hard disk activity
In-Reply-To: <pan.2006.02.14.00.58.15.83417@catfolks.net>
References: <1139850420.902979.71620@o13g2000cwo.googlegroups.com>
	<g9i1v1lbf2rhmgskmkh5f9mt73s67umckk@4ax.com>
	<1139857505.376840.37440@g43g2000cwa.googlegroups.com>
	<1139859890.407497.124870@o13g2000cwo.googlegroups.com>
	<1139863885.755813.324450@g47g2000cwa.googlegroups.com>
	<7xfymn0yda.fsf@ruckus.brouhaha.com>
	<1139864840.300396.170070@o13g2000cwo.googlegroups.com>
	<7xbqxb0xo0.fsf@ruckus.brouhaha.com>
	<1139866059.604198.245040@g44g2000cwa.googlegroups.com>
	<pan.2006.02.14.00.58.15.83417@catfolks.net>
Message-ID: <1139880118.813604.266340@o13g2000cwo.googlegroups.com>

Of course that was the first thing I tried.

But what I meant to say was that at least one port, the python one,
didn't have the checksum validation that Paul was talking about, so I
was wondering if he knew of one that was faithful to the unix port of
it.

Thanks much for the links, though, and all the help.



From cam.ac.uk at mh391.invalid  Sat Feb 25 09:04:02 2006
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sat, 25 Feb 2006 14:04:02 +0000
Subject: python-list/python-dev quoting style
In-Reply-To: <1200ktdnodqqr26@corp.supernews.com>
References: <dtml9t$367$1@gemini.csx.cam.ac.uk> <dtnjdt$n9q$1@panix2.panix.com>
	<dto7um$ils$1@gemini.csx.cam.ac.uk> <dtoti4$nmj$1@panix3.panix.com>
	<dtouti$327$1@gemini.csx.cam.ac.uk>
	<1200ktdnodqqr26@corp.supernews.com>
Message-ID: <dtpo4l$jml$1@gemini.csx.cam.ac.uk>

[Aahz]
>>>And who is "me", anyway?

[me]
>>It's hard to believe that you don't understand who "me" is in
>>a conversation between two people,

[Grant Edwards]
> Since when is a Usenet news group a conversation between two
> people?

Now there are three. At that time only two people had participated in 
this thread.

Is there really confusion about who "me" is? I find that mystifying.
-- 
Michael Hoffman


From blair.houghton at gmail.com  Fri Feb 10 16:47:12 2006
From: blair.houghton at gmail.com (Blair P. Houghton)
Date: 10 Feb 2006 13:47:12 -0800
Subject: in over my head ascii
In-Reply-To: <1139326476.406060.63660@g43g2000cwa.googlegroups.com>
References: <1139245216.350356.272170@z14g2000cwz.googlegroups.com>
	<sk4fu1ljvt7h7d6euj7nq06e1e0ml8p8u5@4ax.com>
	<1139251420.501345.91850@g44g2000cwa.googlegroups.com>
	<1139256817.218319.160370@f14g2000cwb.googlegroups.com>
	<1139259694.603482.293660@g14g2000cwa.googlegroups.com>
	<1139260158.822523.308780@g47g2000cwa.googlegroups.com>
	<1139273414.645101.237780@z14g2000cwz.googlegroups.com>
	<1139289681.648488.7060@g43g2000cwa.googlegroups.com>
	<36mgu1dj9rqh3t8htppm41otgrgf70ob1t@4ax.com>
	<1139319079.318524.158460@f14g2000cwb.googlegroups.com>
	<1139326476.406060.63660@g43g2000cwa.googlegroups.com>
Message-ID: <1139608032.873946.155030@z14g2000cwz.googlegroups.com>


nephish at xit.net wrote:

> so..... how do i make 200 occupy 4 bytes ?

Did you double-check that they didn't want "0200" in ascii
in the message?

As in:

STX0200................ENX

Because that's always possible.  And, if you're _lucky_, they designed
the innards of the message so that "ENX" can never appear at random.
Though with a length parameter, you shouldn't have to worry about
that...though with a length parameter the ENX is redundant...

Argh!

I'm having flashbacks.

--Blair



From bonono at gmail.com  Sun Feb 12 10:43:26 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 12 Feb 2006 07:43:26 -0800
Subject: Is python very slow compared to C
In-Reply-To: <pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
	<1139754010.067582.214830@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>
Message-ID: <1139759006.250258.311840@g44g2000cwa.googlegroups.com>


Steven D'Aprano wrote:
> Lua appears to be *too* lightweight, without even classes or inheritance,
> and a single data type where Python has dicts, sets, tuples and lists.
>
I believe Lua does have features to implement class/inheritance.

As for the distinction of dict/set/tuple/list or one single table data
type(which can be used as   either dict or list and implemented as set,
not sure about tuple), it is up to debate.

Though I have mentioned in another post that the batteries in Python is
extremely appealing to solve real world problems as no matter how good
a language can be, re-implementing something from scratch is always a
pain(and error prone).



From malvert at telenet.be  Tue Feb  7 09:34:08 2006
From: malvert at telenet.be (malv)
Date: 7 Feb 2006 06:34:08 -0800
Subject: Numeric and matlab
References: <mailman.1452.1139174878.27775.python-list@python.org>
	<1139217218.843970.138790@f14g2000cwb.googlegroups.com>
	<mailman.1487.1139232763.27775.python-list@python.org>
Message-ID: <1139322848.483315.65070@g47g2000cwa.googlegroups.com>

A convincing experience is to 'translate' some substantial matlab
matrix code into python.
You will at once see the difference between a true programming language
and matlab

Further, also look at matplotlib.
malv



From joel.hedlund at gmail.com  Mon Feb 13 03:15:10 2006
From: joel.hedlund at gmail.com (Joel Hedlund)
Date: Mon, 13 Feb 2006 09:15:10 +0100
Subject: What editor shall I use?
In-Reply-To: <1139410110.389122.215400@z14g2000cwz.googlegroups.com>
References: <1139410110.389122.215400@z14g2000cwz.googlegroups.com>
Message-ID: <dspeti$k0e$1@news.lysator.liu.se>

Lad wrote:
> What editor shall I use if my Python script must contain utf-8
> characters?

Also, don't overlook IDLE, the IDE that ships with python. I use it in my work every day. Once every three months or so I invest a day in looking for a better free python IDE/editor, and still after 3 years or so, I still haven't found anyhing that beats it. 

Good luck!
/Joel


From steve at REMOVETHIScyber.com.au  Sun Feb 26 17:05:18 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Mon, 27 Feb 2006 09:05:18 +1100
Subject: Is Python a Zen language?
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
	<1140931766.200951.321320@t39g2000cwt.googlegroups.com>
	<1140963005.123017.90890@t39g2000cwt.googlegroups.com>
	<1140986927.452802.241330@e56g2000cwe.googlegroups.com>
Message-ID: <pan.2006.02.26.22.05.17.424862@REMOVETHIScyber.com.au>

On Sun, 26 Feb 2006 12:48:47 -0800, Crutcher wrote:

> My central thesis: you are using a poor understanding of language to
> classify languages into things you understand (tool languages) and
> things which _you_ find 'deep' (and difficult to learn), which you call
> 'Zen languages'. This is ridiculous, e.g. deserving of ridicule. I am
> being mean because you are engaging in mental masturbation in public,
> and I'm worried that you might convince someone.

I've already given my opinion on the classification of languages into two
dichotomies, namely, that it is wrong to classify languages as tool-like
or Zen-like [emphasis on the "or"]. They can be both.

But your objection to the Original Poster's question is as ridiculous as
you claim his question is. There is no ridiculousness to the concept that
a programming language might be designed with crank-the-handle
practicality in mind, and that another might be designed with academic
purity and elegance in mind. Perl is a tool, you generally use it when you
want a quick and dirty solution to some problem, not when you want a deep
theoretical understanding of the problem. We can argue about whether
programming in Lisp is fast, but the language is certainly designed for
theoretical elegance. 

Cobol is an even more so workman-like tool language. It is Turing
Complete, so anything you can do in Lisp you can do in Cobol, but nobody
would want to.

Where the OP got it wrong was his assumption that a language can be one or
the other but not both: practicality and purity are not opposites.

Most people are capable of recognising the OP's two extremes. On the one
hand, there are languages that are easy to use but not deep: they make
easy things easy to do, if not mechanical, but hard things are impossible.
On the other hand, there are languages that require great study and
theoretical planning even to do the basics.

But since easy and deep are orthogonal concepts, not opposites, you also
have languages that are easy to learn as well as deep. They tend to make
easy things simple, and hard things, if not as simple, at least easier.

There are even be languages that are difficult to learn, difficult to
use in practice, and yet not very deep or elegant. For example, Intercal
and the other Turing complete joke languages.


-- 
Steven.



From onurb at xiludom.gro  Tue Feb 14 04:08:03 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Tue, 14 Feb 2006 10:08:03 +0100
Subject: Loop Backwards
In-Reply-To: <1139883877.323042.199040@o13g2000cwo.googlegroups.com>
References: <1139883877.323042.199040@o13g2000cwo.googlegroups.com>
Message-ID: <43f19e0f$0$4761$636a55ce@news.free.fr>

Dave wrote:
> This should be simple, but I can't get it:
> 
> How do you loop backwards through a list?
> 
> For example, in, say, Javascript:
> 
> for (var i  = list.length - 1; i >=0; i--) {
>     do_stuff()
> }
> 
> I mean, I could reverse the list, but I don't want to. I want it to
> stay exactly the same, but I want to start at the end and end at the
> beginning.

for item in reversed(alist):
  do_something_with(item)

or (more perlish at first sight):

for item in alist[::-1]:
  do_something_with(item)



-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From uche.ogbuji at gmail.com  Tue Feb  7 12:34:49 2006
From: uche.ogbuji at gmail.com (uche.ogbuji at gmail.com)
Date: 7 Feb 2006 09:34:49 -0800
Subject: XML SAX parser bug?
In-Reply-To: <1137697641.553973.6620@g14g2000cwa.googlegroups.com>
References: <1137694101.604843.172600@g43g2000cwa.googlegroups.com>
	<mailman.796.1137695504.27775.python-list@python.org>
	<1137697641.553973.6620@g14g2000cwa.googlegroups.com>
Message-ID: <1139333689.568151.176210@f14g2000cwb.googlegroups.com>

mitsura at skynet.be wrote:
> Fredrik Lundh schreef:
> > mitsura at skynet.be wrote:
> > > I think I ran into a bug in the XML SAX parser.
> > >
> > > part of my program consist of reading a rather large XML file (about
> > > 10Mb) containing a few thousand elements.
> > > I have the following problem. Sometimes that SAX parses misreads a
> > > line.
> >
> > it's not a bug; the parser is free to split up character runs (due to buffering,
> > entities or character references, etc).  it's up to you to merge character runs
> > into strings.
>
> but how do I detect that the parser has split up the characters? I gues
> I need to detect it in order to reconstruct the complete string

Here's a recipe:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/265881

Using this filter you can then write SAX code that assumes normalized
text events.  Also, 4Suite's SAX implementation, Saxlette,
automatically does this text event merging for you at C speed:

http://4suite.org/docs/CoreManual.xml#saxlette

--
Uche Ogbuji                               Fourthought, Inc.
http://uche.ogbuji.net                    http://fourthought.com
http://copia.ogbuji.net                   http://4Suite.org
Articles: http://uche.ogbuji.net/tech/publications/



From jearl at xmission.com  Sat Feb  4 12:19:11 2006
From: jearl at xmission.com (Jason Earl)
Date: Sat, 04 Feb 2006 10:19:11 -0700
Subject: Extract contents of html cells
References: <ds2l58$ei8$1@volcano1.grnet.gr>
Message-ID: <8764nvvy7k.fsf@workhorse.earlhome>

Robot <admnstrtrcrw at yahoo.com> writes:

> Dear all,

> I need to create a script which will extract the contents of 2 cells
> of an html that contains a specified number of cells.Then I need to
> put that contents in another cells of my own html page.How can i do
> that?Any samples, tutorials, advice?

The tricky bit is parsing HTML.  Chances are good that what you want
for that is BeautifulSoup:

http://www.crummy.com/software/BeautifulSoup/

Take a look at the examples there and then feel free to ask more
questions.

Jason


From dylan.moreland at gmail.com  Wed Feb  8 14:01:37 2006
From: dylan.moreland at gmail.com (Dylan Moreland)
Date: 8 Feb 2006 11:01:37 -0800
Subject: A __getattr__ for class methods?
References: <1139421293.213901.5380@f14g2000cwb.googlegroups.com>
	<mailman.1612.1139423223.27775.python-list@python.org>
Message-ID: <1139425297.424667.143200@g43g2000cwa.googlegroups.com>

Michael Spencer wrote:
> Dylan Moreland wrote:
> > I'm trying to implement a bunch of class methods in an ORM object in
> > order to provide functionality similar to Rails' ActiveRecord. This
> > means that if I have an SQL table mapped to the class "Person" with
> > columns name, city, and email, I can have class methods such as:
> >
> >     Person.find_by_name
> >     Person.find_by_city_and_name
> >     Person.find_by_name_and_city_and_email
> >
> > I have a metaclass generating basic properties such as .name and .city,
> > but I don't want to generate a class method for every permutation of
> > the attributes. I'd like to have something much like __getattr__ for
> > instance attributes, so that if a method like
> > Person.find_by_city_and_email cannot be found, I can construct a call
> > to the basic find method that hides the SQL. Is there any way of doing
> > this, ...
>
> Sure, define __getattr__ on the type of the class i.e., the metaclass, just as
> you define it on a class to provide default-attribute-lookup to its instances:
>
>   >>> class A(object):
>   ...     class __metaclass__(type):
>   ...         def __getattr__(cls, attr):
>   ...             return "%s.%s" % (cls.__name__, attr)
>   ...
>   >>> A.somefunc
>   'A.somefunc'
>   >>> A.someotherfunc
>   'A.someotherfunc'
>   >>>
>
> HTH
>
> Michael

Thanks! I only recently realized that I would have to learn metaclasses
in order to make this work, and I'm still a bit unclear on their
properties.



From mcbooczech at gmail.com  Mon Feb 20 18:15:43 2006
From: mcbooczech at gmail.com (Petr Jakes)
Date: 20 Feb 2006 15:15:43 -0800
Subject: how to break a for loop?
In-Reply-To: <1140476451.649515.127230@g44g2000cwa.googlegroups.com>
References: <1140476451.649515.127230@g44g2000cwa.googlegroups.com>
Message-ID: <1140477343.684115.222490@z14g2000cwz.googlegroups.com>

zero_list=[0,0,0,0,0,1,2,3,4]
for x in range(len(zero_list)):
    if zero_list[x]!=0: break
nonzero_list=zero_list[x:]
print nonzero_list

but some more "pythonic" solutions will be posted from other users I
guess :)

HTH
Petr Jakes



From grahn+nntp at snipabacken.dyndns.org  Sat Feb 11 15:06:59 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 11 Feb 2006 20:06:59 GMT
Subject: Netstat in python. Does it's possible?
References: <s1mHf.5180$9G6.428@tornado.fastwebnet.it>
	<43EE0286.5020409@v.loewis.de>
Message-ID: <slrndusfol.2t1.grahn+nntp@frailea.sa.invalid>

On Sat, 11 Feb 2006 16:28:06 +0100, Martin v. L?wis <martin at v.loewis.de> wrote:
> billie wrote:
>> Hi all. I don't know if Python is good for this kind of jobs but I'm 
>> wondering if it's possible emulate the "netstat" command in Python.
>
> As a general recommendation, use strace(1) to answer this kind of
> question. Run "strace -o tmp netstat", then inspect tmp to find out
> how netstat obtained the information it reported.

Good idea.

There might still be a problem for people doing things like this: netstat
might use unstable or non-public APIs to find the things it lists. This is
fine because it's typically your OS vendor who have to handle that (ship
another netstat when the /proc or /sys file system layout changes, etc).

If it works like that, you can access the APIs fine from Python -- but you
cannot write a portable 'pynetstat' without a lot of effort and maintenance.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From aprasad21k at gmail.com  Mon Feb 20 12:04:54 2006
From: aprasad21k at gmail.com (aprasad21k at gmail.com)
Date: 20 Feb 2006 09:04:54 -0800
Subject: Is Jython development active?
Message-ID: <1140455094.429697.136330@g47g2000cwa.googlegroups.com>

Don't seem to see much progress in getting out a new version of Jython.
The last beta was out in March 2005. When will a final release be made?



From mikael at isy.liu.se  Wed Feb 15 03:22:30 2006
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Wed, 15 Feb 2006 09:22:30 +0100
Subject: Soduku
In-Reply-To: <1139974607.265594.109370@g44g2000cwa.googlegroups.com>
References: <1139967167.960780.171360@o13g2000cwo.googlegroups.com>
	<mailman.1932.1139968309.27775.python-list@python.org>
	<1139974607.265594.109370@g44g2000cwa.googlegroups.com>
Message-ID: <dsuo4i$2ld$1@news.lysator.liu.se>

Jonathan Gardner wrote:
> How do you have a 16x16 grid for soduku? Are you using 16 digits? 0-F?
> 
> The one I am using has 9 digits, 9 squares of 9 cells each, or 9x9
> cells.

What alphabet you use is irrelevant. Sudokus has really nothing to do 
with numbers. You can use numbers, as well as letters, fruits, or car 
models. Numbers just happen to be nice to use as alphabet for fairly 
small sudokus. The hobby electronics magazine elektor at

     http://www.elektor-electronics.co.uk/

uses 0-F for their 16x16 sudokus.

You can make sudokus of more or less any size. In the kids department at

     http://www.dailysudoku.co.uk

you can find 4x4 and 6x6 grids. Apart from those and the standard 9x9, I 
have also seen 12x12, 16x16 and 25x25. You could make them 8x8 or 99x99 
if you wish. Those numbers should be non-primes, though, since the 
pattern of sub-blocks breaks if the numbers are primes.

Perhaps I should mention the three-dimensional one (9x9x9) that someone 
showed me at work. That particular one was a bore, since it contained 
too much patterns. Or the two orthogonal ones, where you have two 9x9 
sudokus in one with interrelations...

Finally, dailysudoku also has what they call squiggly sudokus, e.g.

 
http://www.dailysudoku.co.uk/sudoku/squiggly/archive.shtml?year=2006&month=02&day=15

By the way, if I'm not completely mistaken, there are only two 
non-equivalent solutions to the 4x4 grid. The equivalence relations 
taken into account are then the following:

   Permutations of the alphabet.
   Interchanging interchangeable rows or columns.
   Transpose - as in matrix transpose - of the whole grid.

Enough off-topic for now
/MiO


From skip at pobox.com  Mon Feb 20 23:01:37 2006
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 20 Feb 2006 22:01:37 -0600
Subject: Writing my own typing monitor program for RSI sufferers...
In-Reply-To: <1140491147.433293.164700@g43g2000cwa.googlegroups.com>
References: <1140491147.433293.164700@g43g2000cwa.googlegroups.com>
Message-ID: <17402.37025.170658.197027@montanaro.dyndns.org>

    >> I want to write a program that will let me know after thirty minutes
    >> of typing that I need to take a five minute typing break.  But when I
    >> stop typing it's smart enough to pause the 30 minute timer
    >> automatically.  This is under the X-Window System (Linux).

Take a look at

    http://sourceforge.net/projects/watch/

If you'd like to be added as a developer, let me know...

Skip


From roccomoretti at hotpop.com  Fri Feb  3 12:16:18 2006
From: roccomoretti at hotpop.com (Rocco Moretti)
Date: Fri, 03 Feb 2006 11:16:18 -0600
Subject: Compiling
In-Reply-To: <mailman.1387.1138986082.27775.python-list@python.org>
References: <mailman.1387.1138986082.27775.python-list@python.org>
Message-ID: <ds0353$6ov$1@news.doit.wisc.edu>

Simon Faulkner wrote:
> Pardon me if this has been done to death but I can't find a simple 
> explanation.
> 
> I love Python for it's ease and speed of development especially for the 
> "Programming Challenged" like me but why hasn't someone written a 
> compiler for Python?
> 
> I guess it's not that simple eh?

The "simple" explanation for the lack of a Python compiler is the 
massive dynamisism (sp) in Python - since you can change practically 
everything at any time, in order to compile a generic python program, 
you have to effectively include the entire interpreter.  It's been done 
before (Python2C was the name, I think), but there wasn't much of a 
speed-up vs. CPython, and it hasn't been updated to work with recent 
versions of Python.

Recently there has been work on JIT type dynamic compilation techniques, 
and static compilation of a reduced Python subset. If you want to know 
more, look up the PyPy project. http://www.codespeak.net/pypy


From mwh at python.net  Fri Feb 10 08:57:07 2006
From: mwh at python.net (Michael Hudson)
Date: Fri, 10 Feb 2006 13:57:07 +0000
Subject: Post-PyCon PyPy Sprint: February 27th - March 2nd 2006 
Message-ID: <2mpslvco5o.fsf@starship.python.net>

The next PyPy sprint is scheduled to take place right after 
PyCon 2006 in Dallas, Texas, USA. 

We hope to see lots of newcomers at this sprint, so we'll give
friendly introductions.  Note that during the Pycon conference 
we are giving PyPy talks which serve well as preparation.  

Goals and topics of the sprint 
------------------------------

While attendees of the sprint are of course welcome to work on what
they wish, we offer these ideas:

  - Work on an 'rctypes' module aiming at letting us use a ctypes
    implementation of an extension module from the compiled pypy-c.

  - Writing ctypes implementations of modules to be used by the above
    tool. 

  - Experimenting with different garbage collection strategies.

  - Implementing Python 2.5 features in PyPy

  - Implementation of constraints solvers and integration of dataflow
    variables to PyPy.

  - Implement new features and improve the 'py' lib and py.test 
    which are heavily used by PyPy (doctests/test selection/...).

  - Generally experiment with PyPy -- for example, play with
    transparent distribution of objects or coroutines and stackless
    features at application level.

  - Have fun!

Location
--------

The sprint will be held wherever the PyCon sprints end up being held,
which is to say somewhere within the Dallas/Addison Marriott Quorum
hotel.

For more information see the PyCon 06 sprint pages:

  - http://us.pycon.org/TX2006/Sprinting
  - http://wiki.python.org/moin/PyCon2006/Sprints

Exact times 
-----------

The PyPy sprint will from from Monday February 27th until Thursday
March 2nd 2006. Hours will be from 10:00 until people have had enough.

Registration, etc.
------------------ 

If you know before the conference that you definitely want to attend
our sprint, please subscribe to the `PyPy sprint mailing list`_,
introduce yourself and post a note that you want to come.  Feel free
to ask any questions or make suggestions there!

There is a separate `PyCon 06 people`_ page tracking who is already
planning to come.  If you have commit rights on codespeak then you can
modify yourself a checkout of

  http://codespeak.net/svn/pypy/extradoc/sprintinfo/pycon06/people.txt

.. _`PyPy sprint mailing list`: http://codespeak.net/mailman/listinfo/pypy-sprint
.. _`PyCon 06 people`: http://codespeak.net/pypy/extradoc/sprintinfo/pycon06/people.txt

-- 
  M-x psych[TAB][RETURN]
                                                             -- try it


From oliphant.travis at ieee.org  Fri Feb 17 05:19:03 2006
From: oliphant.travis at ieee.org (Travis E. Oliphant)
Date: Fri, 17 Feb 2006 03:19:03 -0700
Subject: ANN: Release of NumPy 0.9.5
In-Reply-To: <45ljqdF7706gU1@individual.net>
References: <mailman.2028.1140135591.27775.python-list@python.org>
	<45ljqdF7706gU1@individual.net>
Message-ID: <43F5A317.8010008@ieee.org>

Thomas Gellekum wrote:
> "Travis E. Oliphant" <oliphant.travis at ieee.org> writes:
> 
> 
>>  -  Improvements to numpy.distutils
> 
> 
> Stupid questions: is it really necessary to keep your own copy of
> distutils and even install it? What's wrong with the version in the
> Python distribution? How can I disable the colorized output to get
> something more readable than yellow on white (well, seashell1)?
> 

Yes --- distutils does not provide enough functionality.

Besides, it's not a *copy* of distutils.  It's enhancements to 
distutils.  It builds on top of standard distutils.

I don't know the answer to the colorized output question.  Please post 
to numpy-discussions at lists.sourceforge.net to get more help and/or make 
suggestions.

-Travis





From lycka at carmen.se  Mon Feb 27 10:53:58 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Mon, 27 Feb 2006 16:53:58 +0100
Subject: Using ElementTree to tidy up an XML string to my liking
In-Reply-To: <1jashon94gvt8.cvhbc7vdcpwk.dlg@40tude.net>
References: <1140716245.381730.285310@j33g2000cwa.googlegroups.com>
	<1140767274.159129.268640@i39g2000cwa.googlegroups.com>
	<1140781410.982716.316410@p10g2000cwp.googlegroups.com>
	<dtnfbp$7i8$1@wake.carmen.se>
	<1jashon94gvt8.cvhbc7vdcpwk.dlg@40tude.net>
Message-ID: <dtv7am$qmu$1@wake.carmen.se>

Richard Townsend wrote:
> On Fri, 24 Feb 2006 18:21:59 +0100, Magnus Lycka wrote:
>>Concerning element names, it's your coice of course, but I agree
>>more and more with Guido and PEP008 that camelCase is ugly. (Not
>>that ALLCAPS is better...)
> 
> I can see in PEP008 where it says Capitalized_Words_With_Underscores is
> ugly, but I can't see where it says pure camelCase is ugly ?

Sorry, meant mixedCase (as it was in the XML example). Peter confused
me by writing "myCamelNames"

"""
Function Names

   Function names should be lowercase, possibly with words separated by
   underscores to improve readability.  mixedCase is allowed only in
   contexts where that's already the prevailing style (e.g. threading.py),
   to retain backwards compatibility.

Method Names and Instance Variables

   The story is largely the same as with functions: in general, use
   lowercase with words separated by underscores as necessary to improve
   readability.
"""


From erniedude at gmail.com  Thu Feb  2 16:45:09 2006
From: erniedude at gmail.com (Ernesto)
Date: 2 Feb 2006 13:45:09 -0800
Subject: OS.MKDIR( ) Overwriting previous folder created...
In-Reply-To: <1138916342.531311.190570@g14g2000cwa.googlegroups.com>
References: <1138916342.531311.190570@g14g2000cwa.googlegroups.com>
Message-ID: <1138916709.368871.174290@z14g2000cwz.googlegroups.com>


Ernesto wrote:
> I couldn't find this with a search, but isn't there a way to overwrite
> a previous folder (or at least not perform osmkdir( ) if your program
> detects it already exists).  Thanks !

I suppose this also leads to the question of:

"Is there a way to determine if a path exists or not?"  Then I could
do:

if(path exists){}
else{mkdir("")}



From gh at ghaering.de  Fri Feb 17 11:54:15 2006
From: gh at ghaering.de (=?ISO-8859-1?Q?Gerhard_H=E4ring?=)
Date: Fri, 17 Feb 2006 17:54:15 +0100
Subject: Python Oracle Interace on Solaris
In-Reply-To: <1140192981.811047.73200@g47g2000cwa.googlegroups.com>
References: <1140192981.811047.73200@g47g2000cwa.googlegroups.com>
Message-ID: <43F5FFB7.4000506@ghaering.de>

kenneth.s.chan at gmail.com wrote:
> I am trying to use Python to do queries on a Oracle database using a
> Solaris box. I have seen tools such as cx_Oracle which would be good
> except that my Solaris box does not have an Oracle installation. Do I
> need to have an Oracle installation on my Solaris box to access the
> Oracle database (which is on another machine)? Are there ways to access
> an Oracle database and do queries without having a local copy of Oracle
> installed? Thanks.

There is, but only using Jython, Java and using Oracle's "thin" 
pure-Java JDBC client library.

-- Gerhard


From dan.gass at gmail.com  Sat Feb 18 13:38:56 2006
From: dan.gass at gmail.com (dan.gass at gmail.com)
Date: 18 Feb 2006 10:38:56 -0800
Subject: Making mouse wheel work with pmw ScrolledCanvas widget
Message-ID: <1140287936.010845.68530@g44g2000cwa.googlegroups.com>

Hi,

I am using the pmw tkinter package and having trouble getting the
ScrolledCanvas widget to respond to the mouse wheel.  I am running
Windows XP.  I've Googled it and came up empty.  I believe it should be
possible because Idle's editor window supports scrolling with a mouse
wheel.

Thanks in advance,

Dan Gass



From bdesth.quelquechose at free.quelquepart.fr  Sun Feb 19 10:56:46 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 19 Feb 2006 16:56:46 +0100
Subject: How many web framework for python ?
In-Reply-To: <mailman.2085.1140244423.27775.python-list@python.org>
References: <mailman.2085.1140244423.27775.python-list@python.org>
Message-ID: <43f8718e$0$7344$626a54ce@news.free.fr>

Bo Yang a ?crit :
> Hello everybody ,
> I am a student major in software engeering .
> I need to do something for my course .
> 
> There are very good web framework for java and ruby ,
> Is there one for python ?

In fact, there are actually too much *good* python web frameworks.

> I want to write a web framework for python based on
> mod_python as my course homework , could you give some
> advise ?

Yes : forget it.


From workbee at gmail.com  Mon Feb 20 21:39:44 2006
From: workbee at gmail.com (Enigma Curry)
Date: 20 Feb 2006 18:39:44 -0800
Subject: In need of a virtual filesystem / archive
Message-ID: <1140489584.412886.201420@g47g2000cwa.googlegroups.com>

I need to store a large number of files in an archive. From Python, I
need to be able to create an archive, put files into it, modify files
that are already in it, and delete files already in it.

The easy solution would be to use a zip file or a tar file. Python has
good standard modules for accessing those types. However, I would tend
to think that modifying or deleting files in the archive would require
rewriting the entire archive.

Is there any archive format that can allow Python to modify a file in
the archive *in place*? That is to say if my archive is 2GB large and I
have a small text file in the archive I want to be able to modify that
small text file (or delete it) without having to rewrite the entire
archive to disk.

Does anything like this exist? If nothing exists for Python, is there
something written in C maybe that I could wrap (preferably you won't
suggest wrapping the ext2 filesystem driver..  ;) ?



From steve at REMOVETHIScyber.com.au  Sat Feb  4 06:23:01 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sat, 04 Feb 2006 22:23:01 +1100
Subject: Recursive function going infinite and I can't see why.
References: <mailman.1409.1139037509.27775.python-list@python.org>
Message-ID: <pan.2006.02.04.11.23.00.710814@REMOVETHIScyber.com.au>

On Sat, 04 Feb 2006 02:18:27 -0500, Gregory Pi?ero wrote:

> Hi,
> 
> Would anyone be able to tell me why my function below is getting stuck
> in infinite recusion?
> Maybe I'm just tired and missing something obvious?

Your code is quite confusing, especially since there is very little
documentation. But I'll make a few comments:



> #This is the code that's causing my problem:
> #----------------------------------------------------------------------
> 
> import random
> import sys
> 
> class Test_Class:
>         pass
> class Node:
>     def __init__(self):
>         self.arg0=0
>         self.arg1=0
>         self.arg2=0
>         self.arg3=0

You appear to be iterating over these attributes. Hint: as soon as you
have more than two pieces of data with names like foo0, foo1, foo2...
you probably want something like this:

    def __init__(self):
        self.trees = [0, 0, 0, 0]  # they aren't args, they are sub-trees

You are iterating over everything in __dict__ which is probably not what
you want. Your code has serious side-effects, because you are iterating
over ALL instance attributes, even the ones which are not nodes.

for varname,value in node.__dict__.items():
    node.__dict__[varname] = value
    # this touches all instance attributes

This is safer:

for index, value in enumerate(node.trees):
    node.trees[index] = value
    # this only touches what you want

Now people (and you!) can subclass your Node class without breaking it.



> def snip(node):
>     prob_of_returning_this_node=.4
>     if random.random()<=prob_of_returning_this_node:
>         return node
>     else:
>         if hasattr(node,'__dict__') and len(node.__dict__)>0:
>             return snip(random.choice(node.__dict__.values()))
>         else:
>             return node

This becomes:

def snip(node):
    prob_of_returning_this_node = 0.4
    if random.random() <= prob_of_returning_this_node:
        return node
    else:
        return snip(random.choice(node.trees))


> def replace_within_node(node,oldnode,newnode):
>     if node is oldnode:
>         return newnode
>     else:
>         if hasattr(node,'__dict__'):
>             for varname,value in node.__dict__.items():
> node.__dict__[varname]=replace_within_node(value,oldnode,newnode)
>         return node

becomes:

def replace_within_node(node, oldnode, newnode):
    if node is oldnode:
        return newnode
    else:
        for indx, nd in node.trees:
            node.trees[indx] = replace_within_node(nd, oldnode, newnode)
        return node

This is quite a complex function. It seems to me, and perhaps I'm wrong,
you are walking the nodes and ... doing what? When you call this function,
what are the initial arguments you give it? In other words, what are
oldnode and newnode, and where do they get set?


In another post, you wrote:

"By the way, all I'm trying to do here is take two trees, randomly find
a sub-tree of each and swap the sub-trees.  So if anyone has a simple
method for doing that I'm certainly open to that too."

How about something like this?

random.shuffle(node.trees)

That does more than you ask, but maybe it is useful to you. If you only
want to swap two, maybe something like this:

a, b = random.randint(0,3), random.randint(0,3)
node.trees[a], node.trees[b] = node.trees[b], node.trees[a]


I think what you really need to do here is spend some time building a
general tree class, before getting bogged down in the mechanics of your
application. For example, it would be really useful to print your Node,
and all its subtrees, so you can actually confirm that it contains what
you think it contains.

Why is this important? Because if your tree of nodes contains a loop, such
that node 1 has a subtree with node 2 that has a subtree with node 3 that
has a subtree with node 1 again, most recursive algorithms will never
halt, just keep cycling through the tree forever. Could that be your
problem? There is no way for us to tell from the information we've got.



-- 
Steven.



From duncan.booth at invalid.invalid  Wed Feb 22 14:16:10 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 22 Feb 2006 19:16:10 GMT
Subject: What are COM-enabled applications?
References: <1140580133.293283.322870@f14g2000cwb.googlegroups.com>
	<gq8uc3-iah.ln1@lairds.us>
Message-ID: <Xns9772C3EDC53E2duncanbooth@127.0.0.1>

Cameron Laird wrote:

> Python has good COM abilities.  While, to my surprise, I just
> realized that I'm unaware of anyone having put together a COM
> "explorer" with Python, it would be a straightforward project.

Don't the tools that come with Python's COM support do enough for you?

...\lib\site-packages\win32com\client\combrowse.py for example. (Or inside 
PythonWin it is on the Tools menu).


From ptmcg at austin.rr._bogus_.com  Mon Feb  6 16:58:37 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Mon, 06 Feb 2006 21:58:37 GMT
Subject: * 'struct-like' list *
References: <1139245389.529742.317110@g43g2000cwa.googlegroups.com>
Message-ID: <hEPFf.28994$1%5.14945@tornado.texas.rr.com>

"Ernesto" <erniedude at gmail.com> wrote in message
news:1139245389.529742.317110 at g43g2000cwa.googlegroups.com...
> I'm still fairly new to python, so I need some guidance here...
>
> I have a text file with lots of data.  I only need some of the data.  I
> want to put the useful data into an [array of] struct-like
> mechanism(s).  The text file looks something like this:
>
> [BUNCH OF NOT-USEFUL DATA....]
>
> Name:  David
> Age: 108   Birthday: 061095   SocialSecurity: 476892771999
>
> [MORE USELESS DATA....]
>
> Name........
>
> I would like to have an array of "structs."  Each struct has
>
> struct Person{
>     string Name;
>     int Age;
>     int Birhtday;
>     int SS;
> }
>
> I want to go through the file, filling up my list of structs.
>
> My problems are:
>
> 1.  How to search for the keywords "Name:", "Age:", etc. in the file...
> 2.  How to implement some organized "list of lists" for the data
> structure.
>
> Any help is much appreciated.
>
Ernesto -

Since you are searching for keywords and matching fields, and trying to
populate data structures as you go, this sounds like a good fit for
pyparsing.  Pyparsing as built-in features for scanning through text and
extracting data, with suitably named data fields for accessing later.

Download pyparsing at http://pyparsing.sourceforge.net.

-- Paul

------------------------------------------------
from pyparsing import *

inputData = """[BUNCH OF NOT-USEFUL DATA....]

Name:  David
Age: 108   Birthday: 061095   SocialSecurity: 476892771999

[MORE USELESS DATA....]

Name:  Fred
Age: 101   Birthday: 061065   SocialSecurity: 587903882000

[MORE USELESS DATA....]

Name:  Barney
Age: 99   Birthday: 061265   SocialSecurity: 698014993111

[MORE USELESS DATA....]

"""

dob = Word(nums,exact=6)
# this matches your sample data, but I think SSN's are only 9 digits long
socsecnum = Word(nums,exact=12)

# define the personalData pattern - use results names to associate
# field names with matched tokens, can then access data as if they were
# attributes on an object
personalData = ( "Name:" + empty + restOfLine.setResultsName("Name") +
                 "Age:" + Word(nums).setResultsName("Age") +
                 "Birthday:" + dob.setResultsName("Birthday") +
                 "SocialSecurity:"  + socsecnum.setResultsName("SS") )

# use personData.scanString to scan through the input, returning the
matching
# tokens, and their respective start/end locations in the string
for person,s,e in personalData.scanString(inputData):
    print "Name:", person.Name
    print "Age:",  person.Age
    print "DOB:",  person.Birthday
    print "SSN:",  person.SS
    print

# or use a list comp to scan the whole file, and return your Person data,
giving you
# your requested array of "structs" - not really structs, but ParseResults
objects
persons = [person for person,s,e in personalData.scanString(inputData)]

# or convert to Python dict's, which some people prefer to pyparsing's
ParseResults
persons = [dict(p) for p,s,e in personalData.scanString(inputData)]
print persons[0]
print

# or create an array of Person objects, as suggested in previous postings
class Person(object):
    def __init__(self,parseResults):
        self.__dict__.update(dict(parseResults))

    def __str__(self):
        return "Person(%s, %s, %s, %s)" %
(self.Name,self.Age,self.Birthday,self.SS)

persons = [Person(p) for p,s,e in personalData.scanString(inputData)]
for p in persons:
    print p.Name,"->",p

--------------------------------------
prints out:
Name: David
Age: 108
DOB: 061095
SSN: 476892771999

Name: Fred
Age: 101
DOB: 061065
SSN: 587903882000

Name: Barney
Age: 99
DOB: 061265
SSN: 698014993111

{'SS': '476892771999', 'Age': '108', 'Birthday': '061095', 'Name': 'David'}

David -> Person(David, 108, 061095, 476892771999)
Fred -> Person(Fred, 101, 061065, 587903882000)
Barney -> Person(Barney, 99, 061265, 698014993111)





From http  Wed Feb 22 08:09:06 2006
From: http (Paul Rubin)
Date: 22 Feb 2006 05:09:06 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com> <43fbc788@usenet01.boi.hp.com>
	<87u0ar3gba.fsf@wilson.homeunix.com>
	<pan.2006.02.22.11.35.14.90948@REMOVETHIScyber.com.au>
	<1140612537.685150.68330@o13g2000cwo.googlegroups.com>
Message-ID: <7xu0arbkwd.fsf@ruckus.brouhaha.com>

"Kay Schluehr" <kay.schluehr at gmx.net> writes:
> I talked to Richard Emslie recently and he told me that the PyPy team
> works on a mechanism to create CPython-extension modules written in
> RPython i.e. a statically translateable subset of Python. So even
> without dynamic code specialization there will be an optimization path
> based on the PyPy toolchain that is amazing. 

Sounds great but is that a whole lot different from pyrex?


From jeff at schwabcenter.com  Wed Feb 22 19:08:21 2006
From: jeff at schwabcenter.com (Jeffrey Schwab)
Date: Thu, 23 Feb 2006 00:08:21 GMT
Subject: new wooden door step - fixing and finishing
In-Reply-To: <1140598234.454510.281820@g14g2000cwa.googlegroups.com>
References: <1140598234.454510.281820@g14g2000cwa.googlegroups.com>
Message-ID: <V17Lf.17308$915.16029@southeast.rr.com>

jkn wrote:
> Hi all
>     I'm considering having a go at replacing the wooden door step to
> our back door. The original is loose and rotting.
> 
> I'm sure some of this will be clearer when I remove the (metal) door
> frame - how is such a step fixed? Vertical frame fixings?

Depends on your layout manager.  Btw, you don't have to use Metal:  Java 
frames support native L&F.

> Also, any suggestions for treating/finishing such an item, subject to
> heavy use,

Lots of unit testing.

> to prevent future rot?

Good documentation, especially javadocs.

> I was wondering about treating it
> wilth liberal amounts of Teak Oil or similar...

Some people, when confronted with a problem, think "I know, I?ll use 
Teak Oil."  Now they have two problems.


From exarkun at divmod.com  Sun Feb 19 19:42:09 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Sun, 19 Feb 2006 19:42:09 -0500
Subject: Which is faster? (if not b in m) or (if m.count(b) > 0)
In-Reply-To: <2773CAC687FD5F4689F526998C7E4E5F07434D@au3010avexu1.global.avaya.com>
Message-ID: <20060220004209.6122.1248358041.divmod.quotient.2963@ohm>

On Mon, 20 Feb 2006 10:08:48 +1100, "Delaney, Timothy \(Tim\)" <tdelaney at avaya.com> wrote:
>Farel wrote:
>
>> Tim, Are you saying that:
>>      not (b in m)
>> is faster than:
>>     b not in m
>
>On the contrary. `not (b in m)` requires negating the result of `b in m`
>(via an additional bytecode operation). `b not in m` doesn't. However,
>the difference in performance is minimal, as testing using the timeit
>module will show you.

Not since Python 2.4:

    >>> dis.dis(lambda: x not in y)
      1           0 LOAD_GLOBAL              0 (x)
                  3 LOAD_GLOBAL              1 (y)
                  6 COMPARE_OP               7 (not in)
                  9 RETURN_VALUE        
    >>> dis.dis(lambda: not (x in y))
      1           0 LOAD_GLOBAL              0 (x)
                  3 LOAD_GLOBAL              1 (y)
                  6 COMPARE_OP               7 (not in)
                  9 RETURN_VALUE        
    >>> 

>
>The important difference is the improvement in clarity. There is no
>possibility for misinterpretation as to the meaning of `b not in m`,
>whereas with the original `not b in m` I had to actually go check the
>precedence rules to be sure what would happen. Adding the parentheses
>makes it clear, but doesn't read as well as using the `not in` operator.
>
>As others have said, if you really care about the performance of
>something, the timeit module is your friend. Discussions about *why* you
>get certain performance results are then useful.

But this stuff is all still true :)

Jean-Paul


From balckraven at gmail.com  Wed Feb  1 08:26:39 2006
From: balckraven at gmail.com (Raven)
Date: 1 Feb 2006 05:26:39 -0800
Subject: wxTreeCtrl Q?
In-Reply-To: <1138792014.646535.213080@g44g2000cwa.googlegroups.com>
References: <1138792014.646535.213080@g44g2000cwa.googlegroups.com>
Message-ID: <1138800399.554564.298200@g14g2000cwa.googlegroups.com>

I hope this can help:

http://wxwidgets.org/manuals/2.6.1/wx_wxtreectrl.html#wxtreectrlsetitemfont
http://wxwidgets.org/manuals/2.6.1/wx_wxtreectrl.html#wxtreectrlsetitembold

This pages are from the wxwidgets api reference but the functions are
the same in wxPython

Bye

Ale



From peter at engcorp.com  Fri Feb 10 08:26:10 2006
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 10 Feb 2006 08:26:10 -0500
Subject: Thread Dump of a python process
In-Reply-To: <2868401.post@talk.nabble.com>
References: <2840609.post@talk.nabble.com> <dsflkk$k69$1@sea.gmane.org>
	<2868401.post@talk.nabble.com>
Message-ID: <dsi49j$721$1@sea.gmane.org>

Shanon wrote:
> Thank you for your info. Now I have read that a simple call os.getpid()
> returned the linux identifier of the thread in latest python versions, but
> I'm using Python 2.3 and 2.4 and this call returns always the same id 
> I only want to take the pid of the thread but isn't as easier as it seems.

I believe the underlying call to thread.start_new_thread() already 
returns the thread identifier that you want, but I haven't tried it 
recently and don't recall for sure.  To use this, however, you'd have to 
patch the source or subclass, as I mentioned.

I did this once and stored the result in the Thread as an attribute 
called .threadId and don't recall any problem using that.

-Peter



From cjbackhouse at gmail.com  Thu Feb 23 10:20:42 2006
From: cjbackhouse at gmail.com (cjbackhouse at gmail.com)
Date: 23 Feb 2006 07:20:42 -0800
Subject: Tix, spinboxes, and 1>=5
In-Reply-To: <mailman.2330.1140663712.27775.python-list@python.org>
References: <1140662257.514090.170510@g47g2000cwa.googlegroups.com>
	<mailman.2330.1140663712.27775.python-list@python.org>
Message-ID: <1140708042.504905.155980@g44g2000cwa.googlegroups.com>

> The entry in the spinbox is a string.

Thanks. The only question now is why oh why would anyone design
something so stupid.
(severely tempted to go back to a strongly typed language before even
finishing one program)



From cadavis2k2 at yahoo.com  Wed Feb  1 19:39:19 2006
From: cadavis2k2 at yahoo.com (cadavis2k2 at yahoo.com)
Date: 1 Feb 2006 16:39:19 -0800
Subject: PyGILState_Release + Python2.3 = Segmentation Fault
References: <mailman.1299.1138732524.27775.python-list@python.org>
Message-ID: <1138840759.831346.210040@g43g2000cwa.googlegroups.com>


Kirill Simonov wrote:
> Hi,
>
> Could someone tell me why my extension module works under Python 2.4, but
> fails with Segmentation Fault under Python 2.3? Here is the stripped version:

Maybe Python threads aren't initialized? Adding a call to
PyEval_InitThreads() stops the seg fault for me in Python 2.3 on
Debian:

#include <Python.h>

static PyObject *
test_gil(PyObject *self)
{
    PyGILState_STATE gs;


    Py_BEGIN_ALLOW_THREADS


    gs = PyGILState_Ensure();


    PyGILState_Release(gs);


    Py_END_ALLOW_THREADS


    Py_INCREF(Py_None);
    return Py_None;
}


static PyMethodDef test_gil_methods[] = {
    {"test_gil", (PyCFunction)test_gil, METH_NOARGS},
    {NULL}


};


PyMODINIT_FUNC
init_test_gil(void) {

    /* This added */
    PyEval_InitThreads();

    (void)Py_InitModule("_test_gil", test_gil_methods); 
}



From m_massala at hotmail.com  Fri Feb 24 09:44:00 2006
From: m_massala at hotmail.com (Mimi)
Date: 24 Feb 2006 06:44:00 -0800
Subject: pyserial
References: <1140702690.396244.142370@g43g2000cwa.googlegroups.com>
	<1140745447.632878.286140@p10g2000cwp.googlegroups.com>
Message-ID: <1140792240.745796.61410@p10g2000cwp.googlegroups.com>

Thanks Peter,
 because you have understood my need: a little understanding of
readlines() function.

# Following snippets of code is running in infinitive loop, but it is
not
   necessary too be worried about processor utilization because the
   readline waits for the data on the serial port and the code
continues
   to run when data occurs or when timeout passes.
#

my python script tries to read a lot of data (the histograms)  and that
can take many times (3 min) to download one file. and data do not
arrived in the same time you can wait few seconds between data ( data
response for the same command).
do you think that readlines() function will wait until all data are
arrived or when the timeout expired ?
if the data take more time, the readlines() will wait or will break on
the timeout ?
with hyperterminal the data are echoed when they arrived and you can
see that they do not arrived all the same time.
the timeout is reset when the first data arrived or it is only ignored
?



From enterr at gmail.com  Tue Feb 14 22:55:02 2006
From: enterr at gmail.com (Atanas Banov)
Date: 14 Feb 2006 19:55:02 -0800
Subject: processing limitation in Python
References: <1139935358.128826.58660@g14g2000cwa.googlegroups.com>
	<pan.2006.02.14.17.59.01.993689@REMOVETHIScyber.com.au>
	<1139969467.764899.109450@g44g2000cwa.googlegroups.com>
Message-ID: <1139975702.642631.104560@f14g2000cwb.googlegroups.com>

pdr14 at comcast.net wrote:
> But running it in IDLE just locks up the
> computer.  Bad Windows.

yeah, right - blame it all on Microsoft!

try ctrl-F6 (or Shell / Restart Shell from the menu) in IDLE, which
stops programs from infinite looping

- nas



From sybrenUSE at YOURthirdtower.com.imagination  Sun Feb 19 16:43:43 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Sun, 19 Feb 2006 22:43:43 +0100
Subject: editor for Python on Linux
References: <dtai6e$23m$2@ariane.blic.net>
Message-ID: <slrndvhpkf.9nk.sybrenUSE@schuimige.unrealtower.org>

Mladen Adamovic enlightened us with:
> I wonder which editor or IDE you can recommend me for writing Python 
> programs. I tried with jEdit but it isn't perfect.

I use gvim (if I have X) and vim (if I don't). The only negative thing
about it, is its learning curve ;-)

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From bonono at gmail.com  Tue Feb  7 19:02:55 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 7 Feb 2006 16:02:55 -0800
Subject: Question about idioms for clearing a list
In-Reply-To: <mailman.1567.1139348019.27775.python-list@python.org>
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>
	<E78Gf.22893$Jd.14515@newssvr25.news.prodigy.net>
	<mailman.1567.1139348019.27775.python-list@python.org>
Message-ID: <1139355802.990667.11690@g14g2000cwa.googlegroups.com>


Fredrik Lundh wrote:
> > Python now has, what, three built-in mutable collections types:
> > lists, dictionaries, and sets. Dicts and sets both have a clear()
> > method and lists do not.
>
> dicts and sets are mappings, and lists are not.  mappings don't
> support slicing.  lists do.

I am confused. Could you explain this ? I was under the impression said
above(mapping don't support slicing), until after I read the language
reference. I don't think it is slicing as in the list slicing sense but
it does use the term "extend slicing".

http://www.python.org/doc/2.4.2/ref/slicings.html

"The semantics for an extended slicing are as follows. The primary must
evaluate to a mapping object, and it is indexed with a key that is
constructed from the slice list, as follows. If the slice list contains
at least one comma, the key is a tuple containing the conversion of the
slice items; otherwise, the conversion of the lone slice item is the
key. The conversion of a slice item that is an expression is that
expression. The conversion of an ellipsis slice item is the built-in
Ellipsis object. The conversion of a proper slice is a slice object
(see section 3.2) whose start, stop and step attributes are the values
of the expressions given as lower bound, upper bound and stride,
respectively, substituting None for missing expressions."



From carsten at uniqsys.com  Mon Feb  6 14:03:42 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 06 Feb 2006 14:03:42 -0500
Subject: Replace a module variable with a function call
In-Reply-To: <1139252075.497468.137100@g44g2000cwa.googlegroups.com>
References: <1139252075.497468.137100@g44g2000cwa.googlegroups.com>
Message-ID: <1139252622.20263.17.camel@dot.uniqsys.com>

On Mon, 2006-02-06 at 13:54, gabriel.becedillas at gmail.com wrote:
> I have a module that defines a variable with a constant value and now I
> need to make that value dynamic, without affecting module clients. In
> other words, I need to call a function witout using parenthesis.
> Example:
> 
> mymod.py----------------------
> 
> def value():
>     return "hi"
> 
> client.py--------------------------
> import mymod
> 
> print mymod.value
> 
> Is there a way to do this ?

If you're not passing any arguments to this "function call", what is
this "dynamic" value supposed to depend on? The phase of the moon?

-Carsten




From gregpinero at gmail.com  Wed Feb 15 16:36:41 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Wed, 15 Feb 2006 16:36:41 -0500
Subject: How to import a module with spaces in the name
Message-ID: <312cfe2b0602151336pfb5bbaarffc9027fe971130e@mail.gmail.com>

Let's say I have a module named "Excellent Module.py"

How would I import that into a script?  I'm guessing it will involve
the imp module somehow
(http://www.python.org/doc/2.4.2/lib/module-imp.html) but I didn't
figure it out.

----

And let's go ahead and pretend I have a good reason for doing this and
that I already know that spaces in module filenames should be avoided
at all costs!

Thanks,

--
Gregory Pi?ero
Chief Innovation Officer
Blended Technologies
(www.blendedtechnologies.com)


From martin at v.loewis.de  Fri Feb 17 16:49:32 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 17 Feb 2006 22:49:32 +0100
Subject: Simple question about freeze
In-Reply-To: <1140193845.660117.302750@g43g2000cwa.googlegroups.com>
References: <1140193845.660117.302750@g43g2000cwa.googlegroups.com>
Message-ID: <43F644EC.6000303@v.loewis.de>

mrstephengross wrote:
> I want to make sure that my native executable is entirely standalone.
> That is, it should have no dynamic linking. I've read through a number
> of posts on the subject, and think I get it. In order to make this
> work, I need to do two things:
> 
> (1) Recompile libpythonXXX.a so that the required modules are indeed
> compiled into the archive.
> (2) Modify the freeze-generated Makefile to force gcc to use static
> linking and to use my custom-built libpythonXXX.a in linking together
> the native executable.
> 
> My question is: is it sufficient to carry out the above steps? 

No. You also need to provide static versions of all system libraries.
E.g. if you include _tkinter in your binary, you need static Tcl
libraries, plus, on Unix, static X11 libraries, plus a static C
library; if you include a bsddb module, you need a static bsddb library,
and so on.

> Freeze
> is designed to use the version of python installed on the host system,
> *not* a custom build in a different directory. If freeze looks to the
> system's default installation, but I've modified the makefile to use my
> custom-built libpython.a, will that cause problems? My sense is that it
> will not, but I want to make sure I think things through. Any thoughts?

I don't see a problem with that.

Regards,
Martin


From fraca7 at free.fr  Tue Feb 21 10:50:07 2006
From: fraca7 at free.fr (fraca7)
Date: Tue, 21 Feb 2006 16:50:07 +0100
Subject: Mutable numbers
In-Reply-To: <mailman.2239.1140535316.27775.python-list@python.org>
References: <dteele$9pi$1@home.itg.ti.com>	<43fb2462$0$3211$636a55ce@news.free.fr>
	<mailman.2239.1140535316.27775.python-list@python.org>
Message-ID: <43fb3665$0$3200$636a55ce@news.free.fr>

Steve Holden a ?crit :

> [Thinks: or maybe fraca7 just meant that integers will be garbage 
> collected when there are no more references to them].

Actually I meant that the memory is reused, but the same integer won't 
always have the same address.

I guess that in your example, the '121' is assigned the 'old' address of 
12100, and the result of the operation is assigned the next chunk; the 
following seems to confirm that:

  >>> id(12100)
  8628480
  >>> id(102)
  8628480


From steve at holdenweb.com  Mon Feb 13 23:14:03 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Feb 2006 23:14:03 -0500
Subject: Cygwin IDLE has no menu bar
Message-ID: <dsrle8$ecm$1@sea.gmane.org>

I just wondered whether anyone has seen this problem and fixed it. An
IDLE with no menu bar isn't much use ...

Python 2.4.1 (#1, May 27 2005, 18:02:40)
[GCC 3.3.3 (cygwin special)] on cygwin
Type "copyright", "credits" or "license()" for more information.
[...]
IDLE 1.1.1
>>>

regard
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From justin.azoff at gmail.com  Sat Feb 18 18:50:57 2006
From: justin.azoff at gmail.com (Justin  Azoff)
Date: 18 Feb 2006 15:50:57 -0800
Subject: general coding issues - coding style...
In-Reply-To: <1140305704.970072.177040@g14g2000cwa.googlegroups.com>
References: <slrndve8oe.5jb.mac@news.calmar.ws>
	<slrndvelkv.nrn.mac@news.calmar.ws>
	<1140305704.970072.177040@g14g2000cwa.googlegroups.com>
Message-ID: <1140306657.428960.233930@g14g2000cwa.googlegroups.com>

Dylan Moreland wrote:
> I would look into one of the many Vim scripts which automatically fold
> most large blocks without the ugly {{{.

Who needs a script?
"set foldmethod=indent"
works pretty well for most python programs.



From admnstrtrcrw at yahoo.com  Mon Feb 13 15:47:15 2006
From: admnstrtrcrw at yahoo.com (Robot)
Date: Mon, 13 Feb 2006 22:47:15 +0200
Subject: How to get DVD Drive Name?
Message-ID: <dsqr9b$lhg$1@volcano1.grnet.gr>

How to get the DVD Drive name with Python?


From malvert at telenet.be  Tue Feb  7 05:20:04 2006
From: malvert at telenet.be (malv)
Date: 7 Feb 2006 02:20:04 -0800
Subject: Accessing Windows Serial Port
In-Reply-To: <11ufe0agltktg7d@corp.supernews.com>
References: <1139253898.601680.265220@g44g2000cwa.googlegroups.com>
	<11ufe0agltktg7d@corp.supernews.com>
Message-ID: <1139307603.912911.44770@z14g2000cwz.googlegroups.com>

Hi All,
Would anybody know whether PySerial would work over an usb/serial
adapter?
(what about usb/parallel adapters?)
Thx.
malv



From tdelaney at avaya.com  Mon Feb 13 18:02:50 2006
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Tue, 14 Feb 2006 10:02:50 +1100
Subject: how do you pronounce 'tuple'?
Message-ID: <2773CAC687FD5F4689F526998C7E4E5F4DB94B@au3010avexu1.global.avaya.com>

Grant Edwards wrote:

>> Well, I hope this doesn't make me lose credibility, but I've
>> actually never seen the show! I saw Holy Grail several years
>> ago, though. But I'm very curious about this whole cheese shop
>> skit, so when I get home tonight I'm going to download it. :)
> 
> IMO, it's not as good as the dead-parrot skit, but it's still a
> classic.

And of course, neither are a patch on the Fish-Slapping Dance.

Tim Delaney


From rtilley at vt.edu  Tue Feb 28 08:31:42 2006
From: rtilley at vt.edu (rtilley)
Date: Tue, 28 Feb 2006 08:31:42 -0500
Subject: spaces at ends of filenames or directory names on Win32
In-Reply-To: <1141091023.570661.250590@j33g2000cwa.googlegroups.com>
References: <dtkuav$keb$1@solaris.cc.vt.edu><dtvoap$44m$1@solaris.cc.vt.edu>
	<4AKMf.283745$6p3.8940775@phobos.telenet-ops.be>
	<du03p9$qnc$1@solaris.cc.vt.edu>
	<1141091023.570661.250590@j33g2000cwa.googlegroups.com>
Message-ID: <du1jc7$n3l$1@solaris.cc.vt.edu>

mensanator at aol.com wrote:
> It works for me.

Right. I've found that it's not just the end spaces. The Macs somehow 
copy these files and folders to the PCs without a security descriptor of 
any type! When I goto the folder's properties, I see three tabs:

1. General
2. Web Sharing
3. Customize

They lack the 'Sharing' and 'Security' tabs. The filesystem is NTFS. 
This explains a lot, but I'm still at a loss on how to fix it. It's also 
getting too off-topic for this list, so I'll leave you guys alone. I'll 
work it out somehow.

Many Thanks for all the tips,
Brad



From kent at kentsjohnson.com  Wed Feb 15 09:29:51 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Wed, 15 Feb 2006 09:29:51 -0500
Subject: Code organization
In-Reply-To: <43f335ca$0$1397$626a54ce@news.free.fr>
References: <1140010547.891395.65510@g44g2000cwa.googlegroups.com>
	<43f335ca$0$1397$626a54ce@news.free.fr>
Message-ID: <43f33683$1_3@newspeer2.tds.net>

bruno at modulix wrote:
> Thomas Girod wrote:
>>
>>I found a lot of documentation about how to code in Python, but not
>>much about how you organize your code in various modules / packages ...
>>As I am not yet used to python, this puzzle me a bit.
> 
> Now for best practices and whatnots, this isn't really specific to
> Python. Try to have modules with high cohesion and low coupling, and
> it'll be fine. Eventually try to provide a facade class or function for
> complex packages (this is a current pattern in the standard lib).

Also, be aware of dependencies between packages and make sure they are 
acyclic - if a module in package A imports a module in package B, then A 
depends on B and B should not be allowed to also depend on A either 
directly (module in B imports module in A) or indirectly (module in B 
imports module in C which imports module in A).

If you follow this rule your packages will be more testable and 
reusable. The alternative tends to devolve into 
everything-depends-on-everything-else which makes testing harder and 
reuse nearly impossible.

Kent


From juho.schultz at helsinki.fi  Wed Feb  8 04:05:50 2006
From: juho.schultz at helsinki.fi (Juho Schultz)
Date: Wed, 08 Feb 2006 11:05:50 +0200
Subject: Too Many if Statements?
In-Reply-To: <GU8Gf.22899$Jd.6095@newssvr25.news.prodigy.net>
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<dsaqkj$jhm$1@xenon.Stanford.EDU>
	<GU8Gf.22899$Jd.6095@newssvr25.news.prodigy.net>
Message-ID: <dscc9e$4mg$1@oravannahka.helsinki.fi>

Bryan Olson wrote:
> Alan Morgan wrote:
> 
>> slogging_away wrote:
>>
>>> Hi - I'm running Python 2.4.2 (#67, Sep 28 2005, 12:41:11) [MSC v.1310
>>> 32 bit (Intel)] on win32, and have a script that makes numerous checks
>>> on text files, (configuration files), so discrepancies can be reported.
>>> The script works fine but it appears that I may have hit a wall with
>>> 'if' statements.
>>>
>>> Due to the number of checks perfromed by the script on the text files,
>>> (over 500), there are quite a few 'if' statements in the script, (over
>>> 1150).  It seems that it is at the point that when I add any additional
>>> 'if' statements the script will not run.  No error is produced - it
>>> just returns to the python prompt much the same as when a successful
>>> 'Check Module' command is selected.  If I delete some other 'if'
>>> statements the new ones work so it appears that it has hit a limit on
>>> the number of 'if' statements.  This has stunted any further checks for
>>> the script to make on the text files.
>>>
>>> Hs anyone ever run into this sort of thing?
>>
>>
>>
>> I generated files with 10000, 25000, and 50000 simple if statements 
>> and ran
>> them.  10000 was okay, 25000 gave a bizarre internal error, and 50000 
>> segfaulted
>> and died.  My system has plenty of memory and it isn't obvious to me 
>> why python
>> should be so bothered about this.  I'm not sure why I can have 10x the 
>> number of
>> if statements that cause you trouble.  There might be some overall 
>> limitation
>> on the number of statements in a file.
> 
> 
> I made a script with 100,000 if's, (code below) and it appears
> to work on a couple systems, including Python 2.4.2 on Win32-XP.
> So at first cut, it doesn't seem to be just the if-count that
> triggers the bug.

I tried that code. It runs fine.

However, the following gives a SystemError with only 2500 elif's.

#!/usr/bin/env python
lines = [ 'n = -1','m = 0','if n < 0:','   m = 2*n',]
for i in range(2500):
     lines.append('elif n == %i:' % i)
     lines.append('    m = 2*n')
prog = '\n'.join(lines)
progfile = file('if.py','w')
progfile.writelines(prog)
progfile.close()
exec prog

Traceback (most recent call last):
   File "iftest.py", line 10, in ?
     exec prog
SystemError: com_backpatch: offset too large

I tried this with Python 2.3.3 and 2.3.4 (Linux) and both fail.


From jstroud at ucla.edu  Tue Feb  7 15:17:03 2006
From: jstroud at ucla.edu (James Stroud)
Date: Tue, 07 Feb 2006 12:17:03 -0800
Subject: Tkinter: is there a has_focus method or property for a window?
In-Reply-To: <1139316692.742854.303420@g47g2000cwa.googlegroups.com>
References: <1139316692.742854.303420@g47g2000cwa.googlegroups.com>
Message-ID: <dsav7v$fre$1@daisy.noc.ucla.edu>

Harlin Seritt wrote:
> I have two windows. One is a main config window. The other is an 'Add
> Setting' window. Both are using two different classes.
> 
> Once the Add Setting button is clicked on the Add Setting window, the
> setting is written to file. At that time the main config window should
> update its setting listing but it doesn't because it doesn't know it
> should.
> 
> I do notice that when the Add Setting window closes, the focus goes
> right back to the main config window. Is there a "has focus" event that
> can trigger a command for this window?
> 
> Also, if there is another way to get this done, I am open to
> suggestions.
> 
> Thanks,
> 
> Harlin Seritt
> 

You may want to use focus_set() to make sure a widget has focus, and 
event_generate() to send an event. I've noticed that events generated in 
parents will by processed by children that have focus. Both seem to be 
from the Widget interface.

James


From aleaxit at yahoo.com  Sun Feb 12 16:41:32 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 12 Feb 2006 13:41:32 -0800
Subject: Downloading Large Files -- Feedback?
References: <1139773494.245577.102870@g47g2000cwa.googlegroups.com>
Message-ID: <1hanf3e.1j28qll1hnvr5qN%aleaxit@yahoo.com>

mwt <michaeltaft at gmail.com> wrote:
   ...
> The process is pretty opaque, however. This downloads and writes the
> file with no feedback whatsoever. You don't see how many bytes you've
> downloaded already, etc. Especially the "g = f.read()" step just sits
> there while downloading a large file, presenting a pregnant, blinking
> cursor.
> 
> So my question is, what is a good way to go about coding this kind of
> basic feedback? Also, since my testing has only *worked* with this

You may use urlretrieve instead of urlopen: urlretrieve accepts an
optional argument named reporthook, and calls it once in a while ("zero
or more times"...;-) with three arguments block_count (number of blocks
downloaded so far), block_size (size of each block in bytes), file_size
(total size of the file in bytes if known, otherwise -1).  The
reporthook function (or other callable) may display a progress bar or
whatever you like best.

urlretrieve saves what's downloading to a disk file (you may specify a
filename, or let it pick an appropriate temporary filename) and returns
two things, the filename where it's downloaded the data and a
mimetools.Message instance whose headers have metadata (such as content
type information).

If that doesn't fit your needs well, you may study the sources of
urllib.py in your Python's library source directory, to see exactly what
it's doing and code your own modified version.


Alex

Alex


From juho.schultz at helsinki.fi  Tue Feb 28 08:38:16 2006
From: juho.schultz at helsinki.fi (Juho Schultz)
Date: Tue, 28 Feb 2006 15:38:16 +0200
Subject: Vectorization and Numeric (Newbie)
In-Reply-To: <Pine.LNX.4.63.0602281346010.18656@pantelleria.ifi.uio.no>
References: <Pine.LNX.4.63.0602281346010.18656@pantelleria.ifi.uio.no>
Message-ID: <du1jo8$880$1@oravannahka.helsinki.fi>

Ronny Mandal wrote:
> Assume you have a mathematical function, e.g. f(x) = x + 4
> 
> To calculate all the values from 1 to n, a loop is one alternative.
> 

Numeric and friends (numarray,numpy) have something like numarray.arange 
- they return arrays similar to the lists returned by standard libs 
range function. I would recommend using the built-in array operations as 
much as possible - in most cases they are much faster than looping, and 
your code remains simpler.

> But to make this function work with vectors instead i.e
> f(x_vector) = result_vector,
> how should the function then be implemented?
> 

In most numeric libraries, vectors and scalars can be added etc.
For the simple f(x) case you can use just the simplest approach:

def f(x):
     return x+4

and call this with scalar and vector args.
f_pi = f(3.14159265)
f_1to200 = f(numarray.arange(1,200))


From admnstrtrcrw at yahoo.com  Sat Feb  4 11:35:34 2006
From: admnstrtrcrw at yahoo.com (Robot)
Date: Sat, 04 Feb 2006 18:35:34 +0200
Subject: Extract contents of html cells
Message-ID: <ds2l58$ei8$1@volcano1.grnet.gr>

Dear all,
I need to create a script which will extract the contents of 2 cells of
an html that contains a specified number of cells.Then I need to put
that contents in another cells of my own html page.How can i do that?Any
samples, tutorials, advice?



From mikael at isy.liu.se  Fri Feb 10 09:40:43 2006
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Fri, 10 Feb 2006 15:40:43 +0100
Subject: Create dict from two lists
In-Reply-To: <1139581243.360298.164070@g43g2000cwa.googlegroups.com>
References: <1139579518.129742.265680@o13g2000cwo.googlegroups.com>
	<453k9eF444frU1@uni-berlin.de>
	<dsi70h$48e$1@aphrodite.grec.isp.9tel.net>
	<1139581243.360298.164070@g43g2000cwa.googlegroups.com>
Message-ID: <dsi8e3$jdl$1@news.lysator.liu.se>

py wrote:
> Thanks, itertools.izip and just zip work great.  However, I should have
> mentioned this, is that I need to keep the new dictionary sorted.

Dictionaries aren't sorted. Period.

/MiO


From NethanO at SPdogdiniAM.com  Fri Feb 17 12:12:22 2006
From: NethanO at SPdogdiniAM.com (EShames)
Date: Fri, 17 Feb 2006 17:12:22 GMT
Subject: Win32_Process.Create -- not starting process
In-Reply-To: <1139934330.289815.311900@g14g2000cwa.googlegroups.com>
References: <1139934330.289815.311900@g14g2000cwa.googlegroups.com>
Message-ID: <WtnJf.12435$z%5.5600@twister.nyroc.rr.com>

On 2/14/2006 11:25 AM, abcd wrote:
> I am using Python to create a process on another computer.  Both
> computers are on the same domain with admin privileges.
> 
> On computer B I have a batch script which starts a python script.  From
> computer A I am doing the following:
> 
> import wmi
> w = wmi.WMI("1.2.3.4")
> p = w.new("Win32_Process")
> pid, retVal = p.Create(CommandLine="C:\\a_script.bat")
> print pid, retVal
> 
> The output I get is, 1218 0  ....0 = "Successful Completion"
> .....however the python script that is called from the batch script
> never seems to run or at least only for a split second.  Sometimes I
> see python.exe appear in the task manager on computer B for a split
> second then it goes away.  So I went to computer B and double clicked
> on the batch script, and sure enough a command opened up and the python
> script was running...and stayed running...no problem.   I should
> mention, that sometimes it will execute the batch script and the Python
> script will run and stay running.  That has only happened after trying
> to do "p.Create(CommandLine....)" more than once, but not every time I
> try.
> 
> Any ideas why its not working for me remotely....or why its random?
> These are win xp machines with no firewalls running.
> 

Troubleshooting context issues seems the right track. Consider:

  -Start a_script.bat using %windir%\system32\runas.exe ([/noprofile | 
/profile] [/env] [/netonly] Play with parameters to set and explore 
context issues.

  -Use the (well respected) psexec.exe from Sysinternals to confirm 
remote execution using another means.

  -Also from Sysinternals get and use ProcessExplorer, FileMon, TDIMon 
and TCPMon

Other (possibly insulting to mention, please forgive) win batch 
troubleshooting steps:
  -REM out "@echo off" if any.

  -Place a strategic "pause" in the batch to hold the command window open.

  -Direct output from commands in the bat to a file "set > 
c:\temp\bat_out1.txt" then look at the creator, owner, etc.


Prophylactic measures & things that effect the user context behavior:
  -Check "launch folder windows in a seperate process" in 
Explorer/Tools/Folder Options/View or you will not be able to run 
explorer.exe as an alternate user.
  -Uncheck "use simple file sharing" in same as above.


FWIW Getting runas to to fire cmd.exe, then a .bat can be tricky, I use 
this to wrap runas, maybe it will help:
<rnas.bat>
:: Wrapper for runas.exe
:: If called with a parameter use it as target, otherwise start cmd.exe
:: !Note: /savecred is is convenient, but not very secure!
:: LAST EDIT EBS 2006-02-10

::@echo off

:: !Change _USER to domain and user to run as!
set _USER=domain\user

if %1! == ! (
     %SYSTEMROOT%/system32/runas.exe /savecred /noprofile /user:%_USER% 
"cmd.exe cd /D c:\\\_utils\"
     goto END
) else (
     %SYSTEMROOT%/system32/runas.exe /savecred /user:%_USER% "%~f1"
)

:END
::DIAGNOSTIC
  pause
exit
</rnas.bat>


From Matt  Sun Feb 19 22:26:47 2006
From: Matt (Matt)
Date: Mon, 20 Feb 2006 03:26:47 GMT
Subject: Komodo - Will it Lock Me In?
Message-ID: <yEncExpress_Rulz!_www.techsono.com_3223250807@firstva.com>

Trent Mick <trentm at ActiveState.com> wrote:

>Perhaps you are thinking of some of the C/C++ IDEs (like Visual Studio
>on Windows and Xcode on the Mac)

Hi Trent, Ravi,

Actually, I had two things in mind:

1) HTML editors - I made a website using Yahoo Sitebuilder. It's a pretty good 
tool, but I didn't want to use it any more, but could not simply open my HTML 
files with another editor. I had to spend many hours ripping out the 
Sitebuilder goo first.

2) "RAD" tools. If you write code in VisualBasic, you can't use hardly any of 
it in another Basic RAD tool such as RealBasic. They are ostensibly the same 
language, Basic, but in reality there is only a surface resemblance.

I want to avoid this if I can with Python. I want to have my code, and then 
work on it with different tools. I don't want to have to commit to one tool, 
and then pray that the tool remains in existance. I was really pissed off when 
Microsoft killed Visual Basic 6, and I was stuck with a huge mound of now 
worthless code. I have to rewrite *all* of it. I never want to go through that 
again, which is why I am considering Python.

Thanks,
Matt





From http  Wed Feb  1 19:45:36 2006
From: http (Paul Rubin)
Date: 01 Feb 2006 16:45:36 -0800
Subject: Why checksum? [was Re: Fuzzy Lookups]
References: <1138635665.956131.130630@f14g2000cwb.googlegroups.com>
	<1138670927.377396.78090@g44g2000cwa.googlegroups.com>
	<mailman.1266.1138680617.27775.python-list@python.org>
	<1138721690.283464.71570@g14g2000cwa.googlegroups.com>
	<mailman.1289.1138722708.27775.python-list@python.org>
	<pan.2006.01.31.21.28.14.333129@REMOVETHIScyber.com.au>
	<7xy80wm61h.fsf@ruckus.brouhaha.com>
	<Pine.LNX.4.62.0602010952130.5272@urchin.earth.li>
Message-ID: <7xpsm6d1vz.fsf@ruckus.brouhaha.com>

Tom Anderson <twic at urchin.earth.li> writes:
> > The obvious way is make a list of hashes, and sort the list.
> 
> Obvious, perhaps, prudent, no. To make the list of hashes, you have to
> read all of every single file first, which could take a while. If your
> files are reasonably random at the beginning, ...

The possibility of two different mp3 files having the same id3 tags is
something you might specifically be checking for.  Hashing the first
few hundred bytes would be more reliable, since it would include some
actual audio in the hash.  But then you're back to a list of hashes.

> Better yet, note that if two files are identical, they must have the
> same length, and that finding the length can be done very cheaply, so
> a quicker yet approach is to make a list of lengths, sort that, and
> look for duplicates; when you find one, do a byte-by-byte comparison
> of the files (probably terminating in the first block) to see if they
> really are the same.

Yes, checking the file lengths first is an obvious heuristic, but if
you fine you have a bunch of files with the same length, what do you
do?  You're back to a list of hashes.

> By way of example, of the 2690 music files in my iTunes library, i
> have twelve pairs of same-sized files [1], and all of these differ
> within the first 18 bytes (mostly, within the first 9 bytes).

That's a small enough set of matches that you don't need a general
purpose algorithm.


From phil at riverbankcomputing.co.uk  Mon Feb 13 05:04:21 2006
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Mon, 13 Feb 2006 10:04:21 +0000
Subject: Yet another GUI toolkit question...
In-Reply-To: <87u0b45c72.fsf@pobox.com>
References: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
	<43ED6990.1020707@wordtech-software.com> <87u0b45c72.fsf@pobox.com>
Message-ID: <200602131004.21766.phil@riverbankcomputing.co.uk>

On Monday 13 February 2006 12:33 am, John J. Lee wrote:
> Kevin Walzer <sw at wordtech-software.com> writes:
> [...]
>
> > Commercial Qt is a little out of my price range.
>
> Commercial *PyQt* (including a license for Qt for use only with PyQt)
> is $400 (USD) per developer (plus an extra $300/year if you want
> upgrades).  That's compared to Qt license for use *with C++* varying
> from $1690 to $6260.  So PyQt is 4-15 times cheaper than old-fashioned
> C++ Qt!
>
> http://www.thekompany.com/products/blackadder/
>
>
> Apparently you get mxODBC in that price, too.  And the Blackadder
> development environment itself, of course, though personally I
> wouldn't use it.
>
> PyQt 4 now seems to exist, though not as a stable release yet, so I
> imagine it'll be a bit longer untill there's a release of Blackadder
> that supports Qt 4.  I recall the PyQt 2 --> PyQt 3 upgrade as being
> fairly painless (in terms of code changes), though.

There will never be a release of Blackadder that supports PyQt4.

Phil


From deets at nospam.web.de  Fri Feb 24 14:59:47 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 24 Feb 2006 20:59:47 +0100
Subject: Exception not raised
In-Reply-To: <43ff45e9$0$29105$5fc30a8@news.tiscali.it>
References: <43ff3fc8$0$29105$5fc30a8@news.tiscali.it>
	<468ttdF9vr9mU1@uni-berlin.de>
	<43ff45e9$0$29105$5fc30a8@news.tiscali.it>
Message-ID: <4696tkFa38olU1@uni-berlin.de>

> This code are inside a method into class that have no try/except. And 
> called from a method inside a wx.Frame derivate. The other strange thing 
> is that if I try the same code just before the "caller" to that method, 
> it raise an exception:

So maybe the C-layer of wx in-between doesn't propagate the exception for whatever reason? Fact is: pythons 
exception-handling is core part of the language and an error in there _extremely_ improbable . So I suggest you cut down 
your example until it is self-contained with only a few dozen lines and still produces your observed behavior. Otherwise 
no one will be able to help you.

Diez


From reply.in.the.newsgroup at my.address.is.invalid  Mon Feb  6 06:33:31 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Mon, 06 Feb 2006 12:33:31 +0100
Subject: Strange behavior with os call in cgi script
References: <1139171873.431432.195080@f14g2000cwb.googlegroups.com>	<43e665f1$1@news.uni-ulm.de>	<1139176638.972414.19590@g47g2000cwa.googlegroups.com>
	<tf0du1h7sn03joag0cpjkmtm6hgfg2ppnv@4ax.com>
	<mailman.1464.1139197674.27775.python-list@python.org>
Message-ID: <kbceu1thb6r2trb5u78ml5m9omlbs15moe@4ax.com>

Steve Holden:
>Rene Pijlman:
>> Add logging to your program:
>> http://www.python.org/doc/2.3.5/lib/module-logging.html
>> 
>Probably oiverkill, particularly for a beginner (is it only me that 
>thinks the logging module is either way over-complicated or way 
>under-documented?).

It struck me as somewhat complicated as well.

Looking at the basic example:
http://www.python.org/doc/2.3.5/lib/node304.html

... the things that first-time users shouldn't be bothered with IMO are:

1. Getting a logger by name from a hierarchical namespace. There should be
a module-level log function that logs through the root logger.
2. Formatting the message (use a sensible default)
3. Adding a handler to a logger (artefact of the logging system).
4. Setting a log level (use a sensible default).

Perhaps there should be some module-level functions that make it easier to
'just log this message to that file'.

But I do think that adding logging to a cgi script is a sensible thing to
do for a beginner. Getting that to run in a debugger is probably way more
complicated.

-- 
Ren? Pijlman


From nospam at parasites.com  Sun Feb  5 11:46:25 2006
From: nospam at parasites.com (Keith MacDonald)
Date: Sun, 5 Feb 2006 16:46:25 -0000
Subject: Interpreting Unicode scripts
References: <S7WdnXWtGeCAm3veRVny1g@pipex.net>
	<mailman.1433.1139149283.27775.python-list@python.org>
Message-ID: <dZmdnYcCoLVEtnveRVnyiQ@pipex.net>

That document did help, thanks, although I was initially disconcerted to see 
that it's written in the future tense.  Anyway, it works with Python 2.4.

Keith MacDonald

"Fredrik Lundh" <fredrik at pythonware.com> wrote in message 
news:mailman.1433.1139149283.27775.python-list at python.org...
>
> reading PEP 263 might help:
>
>    http://www.python.org/peps/pep-0263.html
>
> (summary: encode as utf-8, prepend "# coding: utf-8\n", and you're done)
>
> </F>
>
>
> 




From andychambers2002 at yahoo.co.uk  Thu Feb  2 15:08:43 2006
From: andychambers2002 at yahoo.co.uk (andychambers2002 at yahoo.co.uk)
Date: 2 Feb 2006 12:08:43 -0800
Subject: classmethod and instance method
Message-ID: <1138910923.048674.264840@g49g2000cwa.googlegroups.com>

Hi,

I'm trying to write a method that needs to know both the class name and
the  instance details

class A:

    @classmethod
    def meth(cls, self):
        print cls
        print self

a = A()
a.meth(a)

The above code seems to work as intended.  Could the same effect be
achieved using a second decorator in addition to the @classmethod.  I
tried

    def instancemethod(self):
        return self.meth(self)

    @instancemethod
    @classmethod
    def meth(cls, self):
        #do stuff

but it didn't work.  Any suggestions?

Regards,
Andy



From cfriedl at bigpond.net.au  Mon Feb  6 06:19:57 2006
From: cfriedl at bigpond.net.au (bwaha)
Date: Mon, 06 Feb 2006 11:19:57 GMT
Subject: Newbie Help!
References: <43e6a1d4$0$6951$ed2619ec@ptn-nntp-reader02.plus.net>
Message-ID: <xhGFf.244061$V7.100246@news-server.bigpond.net.au>


> 3. Any good ebooks or links to start with. (according to the web this is
the
> best place to start.)

If you get the point of wantig to buy a book, I can recommend Python Visual
Quickstart Guide by Chris Fhris Fehily as a very good text for beginners. I
has helped me a lot.





From joel.hedlund at gmail.com  Tue Feb 21 10:28:25 2006
From: joel.hedlund at gmail.com (Joel Hedlund)
Date: Tue, 21 Feb 2006 16:28:25 +0100
Subject: editor for Python on Linux
In-Reply-To: <mailman.2189.1140476883.27775.python-list@python.org>
References: <dtai6e$23m$2@ariane.blic.net>	<1140423903.462774.193920@g14g2000cwa.googlegroups.com>	<L8fKf.11481$uQ4.3014@tornado.fastwebnet.it>
	<mailman.2189.1140476883.27775.python-list@python.org>
Message-ID: <dtfbaj$8ik$1@news.lysator.liu.se>

>>I really think that IDLE is one of the best around in Python source editing.
> 
> For me, I find that IDLE is about the worse for editing Python sources.

"Worse"? Now that's harsh. I'm with billie on this one. I usually spend a day or so every 3 months trying to find a free python editor that surpasses IDLE. I've been doing it for 3 years now and for me, IDLE is still king of the hill. 

What I like about IDLE is that it is configurable, intuitive and rock stable, and I've come to realize that combination is rare indeed in the world of free editors. 

Another pro for IDLE is that you probably already have it installed, since it comes included in the standard python releases. If you decide to give IDLE a go you might also want to check out the latest subversion version of IDLE, since it has a bunch of really useful syntax helper updates.

Cheers!
/Joel Hedlund


From gregory.petrosyan at gmail.com  Mon Feb 20 18:00:51 2006
From: gregory.petrosyan at gmail.com (Gregory Petrosyan)
Date: 20 Feb 2006 15:00:51 -0800
Subject: how to break a for loop?
Message-ID: <1140476451.649515.127230@g44g2000cwa.googlegroups.com>

Hello!
It's 1:56 o'clock in St.-Petersburg now, and I am still coding... maybe
that's why I encountered stupid problem: I need to remove zeros from
the begining of list, but I can't :-(. I use

        for i,coef in enumerate(coefs):
            if coef == 0:
                del coefs[i]
            else:
                break

but it removes ALL zeros from list. What's up?


P.S. I feel SO stupid asking this quastion... ;-)



From deets at nospam.web.de  Sun Feb  5 09:38:58 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 05 Feb 2006 15:38:58 +0100
Subject: Compiling
References: <mailman.1387.1138986082.27775.python-list@python.org>
	<43e392d1$0$31853$626a54ce@news.free.fr>
	<mailman.1390.1138988111.27775.python-list@python.org>
	<43e3972f$0$624$626a14ce@news.free.fr>
	<1139149306.188367.193770@g47g2000cwa.googlegroups.com>
Message-ID: <44mh03F2to82U2@uni-berlin.de>

> This is a standard response to a rather frequent question here. But I
> am not sure I ever understood. Scheme / Lisp are about as dynamic as
> Python. Yet they have quite efficient native compilers. Ex: Bigloo
> Scheme.

If you provide the necessary annotations for optimization. Not sure about
runtime. But then that is what psyco does (albeit for a limited range of
machines) at runtime. And even in bigloo you end up with guarding
statements for typechecking & and an code-size explosion.

Diez


From grante at visi.com  Mon Feb 13 11:44:57 2006
From: grante at visi.com (Grant Edwards)
Date: Mon, 13 Feb 2006 16:44:57 -0000
Subject: how do you pronounce 'tuple'?
References: <vuednQcT5sUEn23eRVn-iA@rcn.net> <eiUHf.7378$bd4.6826@edtnps84>
	<yd1If.1599$No6.38148@news.tufts.edu>
	<11v18rggmsa317d@corp.supernews.com>
	<1Z1If.1601$No6.38091@news.tufts.edu>
Message-ID: <11v1ds9gtrph7ab@corp.supernews.com>

On 2006-02-13, John Salerno <johnjsal at NOSPAMgmail.com> wrote:
> Grant Edwards wrote:
>> On 2006-02-13, John Salerno <johnjsal at NOSPAMgmail.com> wrote:
>>> Markus Wankus wrote:
>>>
>>>> I'm not sure, but I think it is pronounced "m?nage ? trois".
>>> LOL. You guys are hilarious. I think I made the right decision
>>> to start learning Python!  :)
>> 
>> Of course! What did you expect from devotees of a language
>> named after one of the greatest comedy shows in TV history?
>
> Well, I hope this doesn't make me lose credibility, but I've
> actually never seen the show! I saw Holy Grail several years
> ago, though. But I'm very curious about this whole cheese shop
> skit, so when I get home tonight I'm going to download it. :)

IMO, it's not as good as the dead-parrot skit, but it's still a
classic.

-- 
Grant Edwards                   grante             Yow!  Yow! Now we can
                                  at               become alcoholics!
                               visi.com            


From michaeltaft at gmail.com  Mon Feb  6 12:33:58 2006
From: michaeltaft at gmail.com (mwt)
Date: 6 Feb 2006 09:33:58 -0800
Subject: Code Feedback
Message-ID: <1139247238.520281.144670@f14g2000cwb.googlegroups.com>

Hello -
Last night I wrote my first code in Python -- a little
producer/consumer toy to help me begin to understand things. The
"Library" only has a few books. You can choose how many Readers are
trying to check out the books. When no books are available, they have
to wait until some other Reader returns one. Readers are assigned
random reading speeds and wait times between

It runs fine, but I have a few questions about it.
1) Is this good Python code? What should be changed to make it more
Pythonesque?
2) Anybody know how to alter the "while 1: pass" section to make the
app stoppable?
3) The synchronization I'm using works, but is there a better way to do
it?

Thanks for any insight/pointers, etc.

Also, for any newbies like me, feel free to post variations of this
code. In the next version, I'm going to make it so that readers can't
check out the same book twice.

Here's the code:

#!/usr/bin/python
# Filename: Library.py
# author: MWT
# 5 Feb, 2006

import thread
import time
import threading
import random

class Library:
#The goal here is to create a synchronized list of books
    def __init__(self):
        self.stacks = ["Heart of Darkness", "Die Verwandlung", "Lord of
the Flies", "For Whom the Bell Tolls", "Dubliners", "Cyrano de
Bergerac"]
        self.cv = threading.Condition()

    def checkOutBook(self):
    #remove book from the front of the list, block if no books are
available
        self.cv.acquire()
        while not len(self.stacks) > 0:
            self.cv.wait()
            print "waiting for a book..."
        bookName = self.stacks.pop(0)
        self.cv.release()
        return bookName

    def returnBook(self, nameOfBook):
    #put book at the end of the list, notify that a book is available
        self.cv.acquire()
        self.stacks.append(nameOfBook)
        self.cv.notify()
        self.cv.release()


class Reader(threading.Thread):

    def __init__(self, library, name, readingSpeed, timeBetweenBooks):
        threading.Thread.__init__(self)
        self.library = library
        self.name = name
        self.readingSpeed = readingSpeed
        self.timeBetweenBooks = timeBetweenBooks
        self.bookName = ""


    def run(self):
        while 1:
            self.bookName = self.library.checkOutBook()
            print self.name, "reading", self.bookName
            time.sleep(self.readingSpeed)
            print self.name, "done reading", self.bookName
            self.library.returnBook(self.bookName)
            self.bookName = ""
            time.sleep(self.timeBetweenBooks)


if __name__=="__main__":

    library = Library()
    readers = input("Number of Readers?")
    for i in range(1,readers):
        newReader = Reader(library, "Reader" + str (i),
random.randint(1,7), random.randint(1,7))
        newReader.start()
    while 1: pass



From claudio.grondi at freenet.de  Tue Feb 28 08:57:29 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Tue, 28 Feb 2006 14:57:29 +0100
Subject: Firebird and Python
In-Reply-To: <mailman.2491.1141079616.27775.python-list@python.org>
References: <1140716394.225560.27920@t39g2000cwt.googlegroups.com>	<mailman.2364.1140721473.27775.python-list@python.org>	<1140727082.800917.44550@i40g2000cwc.googlegroups.com>	<dtmk8t$an9$1@wake.carmen.se>	<mailman.2392.1140782962.27775.python-list@python.org>	<dtni65$dnv$1@wake.carmen.se>
	<dtno33$qbk$1@nemesis.news.tpi.pl>	<dtv83h$t52$1@wake.carmen.se>
	<mailman.2491.1141079616.27775.python-list@python.org>
Message-ID: <440456C9.4080604@freenet.de>

Ray Cote wrote:
> At 5:07 PM +0100 2/27/06, Magnus Lycka wrote:
> 
>> <SNIP>
>>  I'm still interested
>> in experiences from Pythonistas using Firebird--
>> especially embedded.
> 
> 
> Works great.
> Python and Firebird embedded (at least on Windows) is very simple to use.
> Not currently using it on other platforms.
> --Ray
> 

May I ask what do I need to use embedded Firebird from Python on Windows?

Which Firebird download
(http://www.firebirdsql.org/download/prerelease/win32/Firebird-2.0.0.12169-0_embed_win32.zip 
  ?)
and which Python module
(http://kinterbasdb.sourceforge.net/ ?)

Do I understand it right, that I can use Firebird database in the same 
way as I can use the Berkeley one provided in Python standard distribution?

Claudio


From jparlar at cogeco.ca  Fri Feb 10 11:04:01 2006
From: jparlar at cogeco.ca (Jay Parlar)
Date: Fri, 10 Feb 2006 08:04:01 -0800
Subject: AdaptionFailure: How to use Interfaces with PyProtocols ?
In-Reply-To: <mailman.5783.1139574079.27774.python-list@python.org>
References: <mailman.5783.1139574079.27774.python-list@python.org>
Message-ID: <2376386114b7fd8a670e8419983ce2a6@cogeco.ca>


On Feb 10, 2006, at 4:21 AM, Nebur wrote:
> Hi,
> I tried to understand the docs of Peak's PyProtocols, and failed.
> I use PyProtocols v0.93 final. I fetched the ...tar.gz file for Linux
> and installed it using the setup.py.
> Here's my Hello-World-like example, that defines a Duck, which
> "implements" the given Interface:
>
>
>  from protocols import Interface,adapt,advise
>
>  class Quackable(Interface):
> 	 def quack(loudness):
> 		 """ print how loud to quack """
>  class Duck:
> 	 advise(instancesProvide=[Quackable,])
> 	 def quack(self, loudness):
> 		 print "quack! %s loud"%(loudness)
>
>  if __name__ == "__main__":
> 	 d = adapt(Duck, Quackable) # this line raises the failure
> 	 d.quack(3)
>

You've *almost* got it. The adaption adapts *instances* of a class. 
Your setup is correct, but change your __main__ to:

if __name__ == "__main__":
     d = Duck()
     adapted_d = adapt(d, Quackable)
     adapted_d.quack(3)


or more concisely:

if __name__ == "__main__":
     d = adapt(Duck(), Quackable)
     d.quack(3)

Of course, it's kind of a pointless example, because you're adapting 
something that declares to be Quackable to a Quackable object, but I'm 
sure you know that :)

Most of my own work with PyProtocols would not involve objects that 
just had 'instancesProvide', but would also have 'asAdapterFor' (at 
least, I think it's 'asAdapterFor', it's been a few months since I've 
touched my PyProtocols related code)

Jay P.



From jgardner at jonathangardner.net  Thu Feb 16 15:39:51 2006
From: jgardner at jonathangardner.net (Jonathan Gardner)
Date: 16 Feb 2006 12:39:51 -0800
Subject: Merging two lists of data (Pythonic way)
In-Reply-To: <8k5Jf.27896$sA3.57@fed1read02>
References: <8k5Jf.27896$sA3.57@fed1read02>
Message-ID: <1140122391.823206.74580@g14g2000cwa.googlegroups.com>

codes = map(lambda x: x[0], list1)
for d in list2:
  if d['code'] in codes:
    d['VERIFIED'] = 1

Is this what you were looking for?



From bearophileHUGS at lycos.com  Tue Feb 14 12:19:37 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 14 Feb 2006 09:19:37 -0800
Subject: processing limitation in Python
In-Reply-To: <1139935358.128826.58660@g14g2000cwa.googlegroups.com>
References: <1139935358.128826.58660@g14g2000cwa.googlegroups.com>
Message-ID: <1139937577.822008.225960@g44g2000cwa.googlegroups.com>

Using CPython or GMPY with a smarter algorithm in acceptable time you
can find that:

12345678987654 == 2 * 3 * 2057613164609

It's a very big number to factorize with that naive algorithm, so the
program hangs... (I have used an online factoring service).

Bye,
bearophile



From johnjsal at NOSPAMgmail.com  Tue Feb 28 13:39:17 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 28 Feb 2006 18:39:17 GMT
Subject: escaping quotes
Message-ID: <pN0Nf.1679$No6.39699@news.tufts.edu>

I'm reading through the tutorial and found this in section 3:

 >>> '"Isn\'t," she said.'
'"Isn\'t," she said.'


Why doesn't the escape sequence work in this case?


From lycka at carmen.se  Sun Feb  5 17:08:06 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Sun, 05 Feb 2006 23:08:06 +0100
Subject: Get System Date?
In-Reply-To: <1139163725.058296.232200@z14g2000cwz.googlegroups.com>
References: <1139161771.537069.181010@g44g2000cwa.googlegroups.com>
	<1139163725.058296.232200@z14g2000cwz.googlegroups.com>
Message-ID: <ds5t06$ut9$1@wake.carmen.se>

Dave wrote:
> Dustan,
> 
> Python has a module called, appropriately, "time". 

This is basically a wrapper around the standard C time
library. Python has a more modern and spiffy datetime
module which isn't restrained to 1970-2038, and just
handles spiffy date and datetime objects instead of
making you deal with awkward conversions between strange
numbers and obscure tuples. The old time module does work,
but due to e.g. strange assymetries in the module, you
have to deal with strange quirks to convert UTC times
right...

 >>> import datetime
 >>> datetime.datetime.now()
datetime.datetime(2006, 2, 5, 23, 1, 45, 569833)


From andreas at openrts.org  Mon Feb 13 15:46:34 2006
From: andreas at openrts.org (Andreas R.)
Date: Mon, 13 Feb 2006 21:46:34 +0100
Subject: asynchat + send problem
In-Reply-To: <mailman.1856.1139862831.27775.python-list@python.org>
References: <dsqpnv$d9$1@orkan.itea.ntnu.no>
	<mailman.1856.1139862831.27775.python-list@python.org>
Message-ID: <dsqr7a$158$1@orkan.itea.ntnu.no>

Fredrik Lundh wrote:
> "Andreas R." <andreas at openrts.org> wrote:
> 
>> I'm using Python's asynchat for networking. If I invoke the send()
>> method of the asynchat module, only a single send operation is possible
>> at any given time. If I call it more than once, only the first call is
>> registered at the other client.
> 
> use "push" to queue outgoing data, not "send".  see
> 
>     http://www.effbot.org/librarybook/asynchat.htm
> 
> for a few examples.

Thanks. This works.


From kay.schluehr at gmx.net  Sun Feb 26 12:23:09 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 26 Feb 2006 09:23:09 -0800
Subject: Is Python a Zen language?
In-Reply-To: <1140965945.834501.62940@e56g2000cwe.googlegroups.com>
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
	<1140931766.200951.321320@t39g2000cwt.googlegroups.com>
	<1140963005.123017.90890@t39g2000cwt.googlegroups.com>
	<1140965945.834501.62940@e56g2000cwe.googlegroups.com>
Message-ID: <1140974589.554928.116700@i40g2000cwc.googlegroups.com>

Andr? wrote:

> > If appearing silly is the price of satisfying your curiousity then so
> > be it. I would, however, like to point out that there is a well
> > established usage of the word "Zen" in computer science.
> [snip; excellent answer from John deleted.]
> > -John Coleman
>
> If I may add: word and their usage is constantly evolving, sometimes
> through mistakes, other times through borrowing from other languages or
> disciplines.

Of course we can refer to "Zen as the term is used in popular culture"
but its like deriving knowledge about taoism listening to Yoda or
watching "Kung Fu".

Kay



From tim.hochberg at ieee.org  Mon Feb 13 14:28:51 2006
From: tim.hochberg at ieee.org (Tim Hochberg)
Date: Mon, 13 Feb 2006 12:28:51 -0700
Subject: trapping errors in function call syntax
In-Reply-To: <m8m1v1h8ae545nsqbl777plviddc94vsdd@4ax.com>
References: <m8m1v1h8ae545nsqbl777plviddc94vsdd@4ax.com>
Message-ID: <dsqmlr$alf$1@sea.gmane.org>

Avi Kak wrote:
> Hello:
> 
>    Suppose I write a function that I want to be called
>    with ONLY keyword argumnts, how do I raise an
>   exception should the function get called with 
>   what look like position-specfic arguments?
> 
>   Any help would be appreciated.

Say you want the signature to be foo(a, b, c) with no positional 
arguments allowed. You can do this:

def foo(*args, **kwargs):
     a = kwargs.pop('a')
     b = kwargs.pop('b')
     c = kwargs.pop('c')
     if args or kwargs:
         raise TypeError("foo takes only keyword arguments: foo(a,b,c)")
     # ...


Or something similar.

-tim



From steve at holdenweb.com  Wed Feb 15 21:21:23 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 15 Feb 2006 21:21:23 -0500
Subject: how do you pronounce 'tuple'?
In-Reply-To: <1140035860.332508.132040@g44g2000cwa.googlegroups.com>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>	<1139863824.940773.36310@f14g2000cwb.googlegroups.com>	<dsr69f$epf$1@news.freedom2surf.net>	<1139904696.784092.224740@o13g2000cwo.googlegroups.com>	<mailman.1921.1139952846.27775.python-list@python.org>
	<1140035860.332508.132040@g44g2000cwa.googlegroups.com>
Message-ID: <dt0niu$25u$1@sea.gmane.org>

Paddy wrote:
> So thats were its from.
> My Parents used to quote it to me when I were a 'wee lad',
> So they read Burns....
> 
Maybe, it's fairly well known. But I rendered it incorrectly, the actual 
quote is

      "Mony a mickle maks a muckle"

me-and-my-fingers-ly y'rs  - steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From rridge at csclub.uwaterloo.ca  Sat Feb 25 15:58:47 2006
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 25 Feb 2006 12:58:47 -0800
Subject: Pure python implementation of string-like class
In-Reply-To: <1140898446.199399.76050@j33g2000cwa.googlegroups.com>
References: <20060225.102645.74687871.kayama@st.rim.or.jp>
	<mailman.2433.1140880297.27775.python-list@python.org>
	<1140891600.822510.189140@v46g2000cwv.googlegroups.com>
	<1140898446.199399.76050@j33g2000cwa.googlegroups.com>
Message-ID: <1140901127.667743.236560@i39g2000cwa.googlegroups.com>

Steve Holden wrote:
>"Wider than UTF-16" doesn't make sense.

Ross Ridge wrote"
> It makes perfect sense.

Alan Kennedy wrote:
> UTF-16 is a "Unicode Transcription Format", meaning that it is a
> mechanism for representing all unicode code points, even the ones with
> ordinals greater than 0xFFFF, using series of 16-bit values.

It's an encoding format that only supports encoding 1,112,064 different
characters making it a little more than 20-bits wide.   While this
enough to encode all code points currently assigned by Unicode, it's
not sufficient to encode the private use area of ISO 10646-1 that
Akihiro Kayama wants to use.

                                                   Ross Ridge



From vivainio at gmail.com  Sat Feb 18 03:16:45 2006
From: vivainio at gmail.com (Ville Vainio)
Date: 18 Feb 2006 00:16:45 -0800
Subject: How many web framework for python ?
References: <mailman.2085.1140244423.27775.python-list@python.org>
Message-ID: <1140250605.536649.247550@z14g2000cwz.googlegroups.com>

Bo Yang wrote:

> There are very good web framework for java and ruby ,
> Is there one for python ?

There are many good ones.

> I want to write a web framework for python based on
> mod_python as my course homework , could you give some
> advise ?

Implement yet another web framework? It needs to be made harder so
people can stop doing it all the time. ;-)

You might want to watch the 20 min turbogears video for a laid back
approach of familiarizing yourself with a python web framework:

http://www.turbogears.org/docs/wiki20/20MinuteWiki.mov



From aahz at pythoncraft.com  Sun Feb  5 15:13:39 2006
From: aahz at pythoncraft.com (Aahz)
Date: 5 Feb 2006 12:13:39 -0800
Subject: Thread imbalance
References: <1138912272.382474.13170@g44g2000cwa.googlegroups.com>
	<ds3d35$mo6$2@bagan.srce.hr>
	<mailman.1427.1139097680.27775.python-list@python.org>
	<ds55tb$n00$1@bagan.srce.hr>
Message-ID: <ds5m9j$1p$1@panix2.panix.com>

In article <ds55tb$n00$1 at bagan.srce.hr>, Ivan Voras  <ivoras at fer.hr> wrote:
>Peter Hansen wrote:
>>
>> Ivan, what makes you say that Python is bad for threads?  Did the 
>> qualifcation "concurrently executing/computing" have some significance 
>> that I missed?
>
>Because of the GIL (Giant interpreter lock). It can be a matter of 
>opinion, but by "good threading implementation" I mean that all threads 
>in the application should run "natively" on the underlying (p)threads 
>library at all times, without implicit serialization. For example, Java 
>and perl do this, possibly also lua and C#. Python and Ruby have a giant 
>interpreter lock which prevents two threads of pure python code (not 
>"code written in C" :)) ) in one interperter process executing at the 
>same time.

When did Perl gain threads?  If you read Bruce Eckel, you also know that
the Java threading system has been buggy for something like a decade.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"19. A language that doesn't affect the way you think about programming,
is not worth knowing."  --Alan Perlis


From grahn+nntp at snipabacken.dyndns.org  Sat Feb  4 05:59:48 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 4 Feb 2006 10:59:48 GMT
Subject: Starting terminal applications from within python
References: <1138899294.111613.151980@g49g2000cwa.googlegroups.com>
	<mailman.1356.1138900812.27775.python-list@python.org>
	<1138902080.060259.198320@z14g2000cwz.googlegroups.com>
Message-ID: <slrndu8vvp.kgo.grahn+nntp@frailea.sa.invalid>

On 2 Feb 2006 09:41:20 -0800, sleepylight <sleepylight at gmail.com> wrote:
> Ah!  I see now.  That makes prefect sense.  I guess I was thinking that
> python was simply going to pass a whole command string to the program
> rather than give each argument as individual strings.  Seeing this
> makes the documentation seem much more sensible.  Thank you!

[offtopic]

You might also want to look into using the screen(1) utility. I have found
that doing "screen foo" (from within a screen session) is often a superior
way to achieve the things people often use "xterm -e foo" for. Especially if
they have scripts pop up lots of applications in separate terminals.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From http  Mon Feb 20 22:22:34 2006
From: http (Paul Rubin)
Date: 20 Feb 2006 19:22:34 -0800
Subject: In need of a virtual filesystem / archive
References: <1140489584.412886.201420@g47g2000cwa.googlegroups.com>
Message-ID: <7xzmklief9.fsf@ruckus.brouhaha.com>

"Enigma Curry" <workbee at gmail.com> writes:
> Is there any archive format that can allow Python to modify a file in
> the archive *in place*? That is to say if my archive is 2GB large and I
> have a small text file in the archive I want to be able to modify that
> small text file (or delete it) without having to rewrite the entire
> archive to disk.
> 
> Does anything like this exist? 

Yes, what you want is called a database.  Try the bsddb module or
something with MySQL depending on your requirements.


From robert.h.boyd at gmail.com  Thu Feb  9 08:48:49 2006
From: robert.h.boyd at gmail.com (Robert Boyd)
Date: Thu, 9 Feb 2006 08:48:49 -0500
Subject: Curios issues with Editors
In-Reply-To: <1139489181.944396.101710@o13g2000cwo.googlegroups.com>
References: <1139487823.219867.71790@z14g2000cwz.googlegroups.com>
	<mailman.1656.1139488176.27775.python-list@python.org>
	<1139489181.944396.101710@o13g2000cwo.googlegroups.com>
Message-ID: <e9e3813b0602090548s19a80c29p71648d6be74fa34e@mail.gmail.com>

On 9 Feb 2006 04:46:21 -0800, rodmc <userprogoogle-139 at yahoo.co.uk> wrote:
> As I said I am most likely to have made an error, being a newbie and
> all that. Here is the offending function. I said i would not post
> source code but there you go...
>
> As I said I plan to change this function, so it will no doubt be out of
> date quite soon.
>
> def senddata(msg):
>     host = "localhost"
>     port = 21568
>     buf = 1024
>     addr = (host,port)
>
>     UDPSock = socket(AF_INET,SOCK_DGRAM)
>     UDPSock.sendto(msg,addr)
>     UDPSock.close()


Are you doing this?
import socket
from socket import AF_INET, SOCK_DGRAM
UDPSock = socket(AF_INET, SOCK_DGRAM)

>>> TypeError: 'module' object is not callable


When you should be calling socket.socket, or from socket import socket.

This code runs in SPE:

from socket import socket, AF_INET, SOCK_DGRAM

host = "localhost"
port = 21568
buf = 1024
addr = (host,port)
msg = 'foo'

UDPSock = socket(AF_INET, SOCK_DGRAM)
UDPSock.sendto(msg,addr)
UDPSock.close()

From lucaberto at libero.it  Thu Feb 16 11:05:36 2006
From: lucaberto at libero.it (luca72)
Date: 16 Feb 2006 08:05:36 -0800
Subject: Pyserial never read
Message-ID: <1140105936.408387.88130@z14g2000cwz.googlegroups.com>

Hello at all
sorry for my english but i'm Italian.
I use pyserial to communicate via rs232 with an extarnal device called
smartmouse.
I write the exact line that i want , but when i read i read only the
echo ond not the other bytes.
When i meke the same project with delphi i solve this problem with the
call of the sleep.
But in python it don't work.
Have you got some ideas for solve my problem?

Best Regards

Luca



From enterr at gmail.com  Tue Feb 21 16:33:36 2006
From: enterr at gmail.com (Atanas Banov)
Date: 21 Feb 2006 13:33:36 -0800
Subject: why does close() fail miserably on popen with exit code -1 ?!
In-Reply-To: <StqKf.15045$915.11149@southeast.rr.com>
References: <1140416836.030294.289800@f14g2000cwb.googlegroups.com>
	<StqKf.15045$915.11149@southeast.rr.com>
Message-ID: <1140557616.536916.195910@o13g2000cwo.googlegroups.com>

Jeffrey Schwab wrote:
> _PyPclose returns the exit status of the popened process (the popenee?),
> or -1 on error.  Of course, if the status is supposed to be -1, there's
> some confusion.

yes, that's what i thought the root of the problem is.

> In the snippet of code below (from Modules/posixmodule.c), result has
> been initialized to the output of fclose, which in your case is 0.  The
> comment is particularly handy.
>
...
> 		/* Indicate failure - this will cause the file object
> 		 * to raise an I/O error and translate the last
> 		 * error code from errno.  We do have a problem with
> 		 * last errors that overlap the normal errno table,
> 		 * but that's a consistent problem with the file object.
> 		 */

the piece you quoted is from the unix #ifdef part, i think. there is
another version of the pypclose for windows below that.

in any event i think such behaviour is a bug - just because in unix
exit codes are limited to 0..255 (and returned multiplied by 256)
doesnt mean other OSes should suffer because of design flow in
_PyPclose, right?

throwing an IOError "no error" doesnt help.

is there a bug database for python where i can check if this was
discussed?



From jstroud at ucla.edu  Tue Feb  7 23:09:54 2006
From: jstroud at ucla.edu (James Stroud)
Date: Tue, 07 Feb 2006 20:09:54 -0800
Subject: apostrophe or double quote?
In-Reply-To: <1139370460.360400.232500@z14g2000cwz.googlegroups.com>
References: <1139370460.360400.232500@z14g2000cwz.googlegroups.com>
Message-ID: <dsbqui$7o1$1@daisy.noc.ucla.edu>

Huy wrote:
> I've been unable to find information clarifying this but.  What is the
> difference between 'somestring' and "somestring"?  When I use type() it
> still reports as string.  If there is a difference could someone point
> me to documentation or explain when to use and when not to?  Hope I
> sound clear.
> 

There is no difference. However, compare the following:

py> 'internal quotes: "'
'internal quotes: "'
py> "internal apostrophe: '"
"internal apostrophe: '"
py> 'astring'
'astring'
py> "astring"
'astring'



From norvell at stenocall.com  Wed Feb 22 17:15:23 2006
From: norvell at stenocall.com (Norvell Spearman)
Date: Wed, 22 Feb 2006 16:15:23 -0600
Subject: list assignment
In-Reply-To: <794Lf.17288$915.8932@southeast.rr.com>
References: <11vpi2gdcbccbf6@corp.supernews.com>
	<1140641275.840358.292790@o13g2000cwo.googlegroups.com>
	<794Lf.17288$915.8932@southeast.rr.com>
Message-ID: <11vpojp9rtosu3f@corp.supernews.com>

Jeffrey Schwab wrote:
> TMTOWTDI, after all. :)

A bit ironic that that's the official motto of Perl, don't you think?

--
Norvell Spearman


From michele.simionato at gmail.com  Thu Feb  9 11:39:25 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 9 Feb 2006 08:39:25 -0800
Subject: super(...).__init__() vs Base.__init__(self)
In-Reply-To: <43eb5a9d$1_2@newspeer2.tds.net>
References: <43eb5a9d$1_2@newspeer2.tds.net>
Message-ID: <1139503165.385628.37860@g44g2000cwa.googlegroups.com>

I remember there was somewhere a page called "super considered
harmful", some googling
should find it. It was discussing the issue you are alluding to, as
well others. Also google
in the newsgroup, there are lots of threads about super and its
shortcomings.

  Michele Simionato



From siona at chiark.greenend.org.uk  Thu Feb  9 11:51:39 2006
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 09 Feb 2006 16:51:39 +0000 (GMT)
Subject: Finding the public callables of self
References: <1139501230.964886.190500@g43g2000cwa.googlegroups.com>
Message-ID: <B4s*gZT+q@news.chiark.greenend.org.uk>

Russell Warren <russandheather at gmail.com> wrote:
>Is there any better way to get a list of the public callables of self
>other than this?
>
>    myCallables = []
>    classDir = dir(self)
>    for s in classDir:
>      attr = self.__getattribute__(s)
>      if callable(attr) and (not s.startswith("_")):
>        myCallables.append(s) #collect the names (not funcs)
>
>I don't mean a shorter list comprehension or something that just drops
>the line count, but whether or not I need to go at it through dir and
>__getattribute__.  This seems a bit convoluted and with python it often
>seems there's something already canned to do stuff like this when I do
>it.  At first I thought self.__dict__ would do it, but callable methods
>seem to be excluded so I had to resort to dir, and deal with the
>strings it gives me.

This last sentence suggests to me something like:

    attrs = set(s for s in dir(self) if not s.startswith('_'))
    myCallables = attrs.difference(a.__dict__)
    return list(myCallables)

(which you can get down to one line if you want).

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From steve at REMOVEMEcyber.com.au  Tue Feb 21 03:42:32 2006
From: steve at REMOVEMEcyber.com.au (Steven D'Aprano)
Date: Tue, 21 Feb 2006 19:42:32 +1100
Subject: In need of a virtual filesystem / archive
References: <1140489584.412886.201420@g47g2000cwa.googlegroups.com>
Message-ID: <43FAD278.3090508@REMOVEMEcyber.com.au>

Enigma Curry wrote:

> I need to store a large number of files in an archive. From Python, I
> need to be able to create an archive, put files into it, modify files
> that are already in it, and delete files already in it.
> 
> The easy solution would be to use a zip file or a tar file. Python has
> good standard modules for accessing those types. However, I would tend
> to think that modifying or deleting files in the archive would require
> rewriting the entire archive.
> 
> Is there any archive format that can allow Python to modify a file in
> the archive *in place*? That is to say if my archive is 2GB large and I
> have a small text file in the archive I want to be able to modify that
> small text file (or delete it) without having to rewrite the entire
> archive to disk.

Yes. I believe your common or garden variety file 
manager can handle this task, by storing files in an 
archive called "a directory". For example, many mail 
systems use the "maildir" archive for storing email 
while still being able to access it quickly and robustly.

Do you really need to store your files in a single 
meta-file? Do you need compression? How much overhead 
for the archive structure are you prepared to carry? Do 
you expect the archive to shrink when you delete a file 
from the middle?

I suspect you can pick any two of the following three:

1. single file
2. space used for deleted files is reclaimed
3. fast performance

Using a proper database will give you 2 and 3, but at 
the cost of a lot of overhead, and typically a 
relational database is not a single file.



-- 
Steven.



From gh at ghaering.de  Wed Feb 22 15:38:21 2006
From: gh at ghaering.de (=?ISO-8859-1?Q?Gerhard_H=E4ring?=)
Date: Wed, 22 Feb 2006 21:38:21 +0100
Subject: Little tool - but very big size... :-(
In-Reply-To: <ecCdnZ2f8MjdXmHenZ2dnUVZ_tSdnZ2d@is.co.za>
References: <mailman.2211.1140513270.27775.python-list@python.org>	<quBKf.1339$A83.42251@twister1.libero.it>
	<ecCdnZ2f8MjdXmHenZ2dnUVZ_tSdnZ2d@is.co.za>
Message-ID: <43FCCBBD.9090807@ghaering.de>

Max wrote:
> Giovanni Bajo wrote:
> 
>>There are also other choices that can be made. For instance, wxWidgets is
>>*HUGE*.
> 
> Indeed. Remember Tkinter is built-in. [...]

Tkinter is only built-in in the sense that it's shipped with Python by 
default. It is not automatically part of a minimal Python runtime that's 
created with py2exe or a similar tool.

A Tkinter hello weights here 1,95 MB (2.049.264 Bytes)

compared to the small wxPython tool that I compressed recently: 2,80 MB 
(2.942.543 Bytes)

All self-extracting LZMA compressed archives using 7ZIP.

-- Gerhard


From jeff at schwabcenter.com  Sun Feb 26 11:31:19 2006
From: jeff at schwabcenter.com (Jeffrey Schwab)
Date: Sun, 26 Feb 2006 16:31:19 GMT
Subject: sort one list using the values from another list
In-Reply-To: <mailman.2447.1140969980.27775.python-list@python.org>
References: <mailman.2447.1140969980.27775.python-list@python.org>
Message-ID: <rJkMf.26567$915.3079@southeast.rr.com>

Brian Blais wrote:
> Hello,
> 
> I have two lists, one with strings (filenames, actually), and one with a 
> real-number
> rank, like:
> 
> A=['hello','there','this','that']
> B=[3,4,2,5]
> 
> I'd like to sort list A using the values from B, so the result would be 
> in this example,
> 
> A=['this','hello','there','that']
> 
> The sort method on lists does in-place sorting.  Is there a way to do 
> what I want here?

If A has no duplicate elements, you could create a hash mapping A's 
elements to their respective precedences, then provide a sort criterion 
that accessed the hash.  Alternatively, you could do something like this:

from operator import itemgetter
result = map(itemgetter(0), sorted(zip(A, B), key=itemgetter(1)))


From mac at calmar.ws  Fri Feb 10 13:19:33 2006
From: mac at calmar.ws (calmar)
Date: Fri, 10 Feb 2006 19:19:33 +0100
Subject: get output of cmd-line command under MS windows
References: <slrndujm8k.2uf.mac@news.calmar.ws>
	<mailman.1598.1139411970.27775.python-list@python.org>
Message-ID: <slrndupm9l.8n4.mac@news.calmar.ws>

On 2006-02-08, Bernard Lebel <3dbernard at gmail.com> wrote:

Hi Bernhard and all,

> oPipe = os.popen( "run C:/program files/my app/executable.exe" )
>
> while 1:
> 	sLine = oPipe.read()
> 	print sLine
> 	if sLine == '':
> 		print 'No more line from pipe, exit.'
> 		break
>

I see. I saw also os.popen("....").read() or so.

Anyway, not sure if that would also catch stderr?

But doesn't matter. It seems, imagemagick (binaries) won't provide
proper error-codes, but at least when it prints something, something was
not ok probably. 

I will check the resulting file, to see if everything went ok, and try
to catch the output like you mentioned.

thanks a lot
marco

-- 
  calmar

          (o_  It rocks: LINUX + Command-Line-Interface
          //\
          V_/_                     http://www.calmar.ws


From durumdara at gmail.com  Mon Feb 27 07:21:08 2006
From: durumdara at gmail.com (Durumdara)
Date: Mon, 27 Feb 2006 13:21:08 +0100
Subject: wxPython and Py2Exe... 2 questions
Message-ID: <4402EEB4.1080001@gmail.com>

Hi !

I have an application that I compile to exe.

1.)
I want to compile main.ico into exe, or int zip. Can I do it ?

2.)
Can I compile the result to my specified directory, not into the dist ?
I want to structure my projects like this:
\src\
python codes, etc.
\res\
icons, etc
\bin\
the compiled version (exe, bins)
Can I do it with py2exe ?

Thanx for the help:
dd

Ps:
The setup file is:
# A setup script showing advanced features.
#
# Note that for the NT service to build correctly, you need at least
# win32all build 161, for the COM samples, you need build 163.
# Requires wxPython, and Tim Golden's WMI module.

# Note: WMI is probably NOT a good example for demonstrating how to
# include a pywin32 typelib wrapper into the exe: wmi uses different
# typelib versions on win2k and winXP.  The resulting exe will only
# run on the same windows version as the one used to build the exe.
# So, the newest version of wmi.py doesn't use any typelib anymore.

from distutils.core import setup
import py2exe
import sys

# If run without args, build executables, in quiet mode.
if len(sys.argv) == 1:
    sys.argv.append("py2exe")
    sys.argv.append("-q")

class Target:
    def __init__(self, **kw):
        self.__dict__.update(kw)
        # for the versioninfo resources
        self.version = "1.5.0"
        self.company_name = "DurumDara Ltd."
        self.copyright = "Copyright by DurumDara 2006."
        self.name = "wxPyHDDirList"

################################################################
# A program using wxPython

# The manifest will be inserted as resource into test_wx.exe.  This
# gives the controls the Windows XP appearance (if run on XP ;-)
#
# Another option would be to store it in a file named
# test_wx.exe.manifest, and copy it with the data_files option into
# the dist-dir.
#

wxPyHDDirList = Target(
    # used for the versioninfo resource
    description = "wxPyHDDirList",

    # what to build
    script = "wxPyHDDirList.py",
    icon_resources = [(1, "main.ico")],
    dest_base = "wxPyHDDirList")

setup(
    options = {"py2exe": {"bundle_files": 1,
                          "compressed": 1,
                          "optimize": 2}},
    # The lib directory contains everything except the executables and 
the python dll.
    # Can include a subdirectory name.
    windows = [wxPyHDDirList],
    )

Ps2:
A BUG !

setup(
    options = {"py2exe": {"bundle_files": 1,
                          "compressed": 3, # !
                          "optimize": 4}}, # !
    # The lib directory contains everything except the executables and 
the python dll.
    # Can include a subdirectory name.
    windows = [wxPyHDDirList],
    )

These valus makes that compiled exe is cannot do encodings (example: 
iso-8859-2).... :-(









From mark at mark-fink.de  Sun Feb  5 06:48:35 2006
From: mark at mark-fink.de (Mark Fink)
Date: 5 Feb 2006 03:48:35 -0800
Subject: rexec in jython??
In-Reply-To: <1139138133.072742.282710@z14g2000cwz.googlegroups.com>
References: <1139138133.072742.282710@z14g2000cwz.googlegroups.com>
Message-ID: <1139140115.016898.72360@z14g2000cwz.googlegroups.com>

sorry for the double post!
It is the r_eval() functionality of the rexec module I am looking
forward to replace



From steve at holdenweb.com  Wed Feb  8 00:57:45 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 08 Feb 2006 00:57:45 -0500
Subject: Literal Escaped Octets
In-Reply-To: <pan.2006.02.08.02.34.06.750887@hotmail.com>
References: <pan.2006.02.06.04.50.15.325558@hotmail.com>	<mailman.1495.1139233969.27775.python-list@python.org>	<pan.2006.02.06.16.57.13.359336@hotmail.com>	<mailman.1532.1139277512.27775.python-list@python.org>
	<pan.2006.02.08.02.34.06.750887@hotmail.com>
Message-ID: <dsc18s$qsq$1@sea.gmane.org>

Chason Hayes wrote:
> On Tue, 07 Feb 2006 01:58:00 +0000, Steve Holden wrote:
> 
> 
>>Chason Hayes wrote:
>>
>>>On Mon, 06 Feb 2006 13:39:17 +0000, Steve Holden wrote:
>>
>>[...]
>>
>>>>The URL you reference is discussing how you represent arbitrary values 
>>>>in string literals. If you already have the data in a Python string the 
>>>>best advise is to use a parameterized query - that way your Python DB 
>>>>API module will do the escaping for you!
>>>>
>>>>regards
>>>> Steve
>>>
>>>
>>>Thanks for the input. I tried that with a format string and a
>>>dictionary, but I still received a database error indicating illegal
>>>string values. This error went away completely when I used a test file
>>>consisting only of text, but reproduced everytime with a true binary file.
>>>If you can let me know where I am wrong or show me a code snippet with a
>>>sql insert that contains a variable with raw binary data that works,
>>>I would greatly appreciate it.
>>>
>>
>>I tried and my experience was exactly the same, which made me think less 
>>of PostgreSQL.
>>
>>They don't seem to implement the SQL BLOB type properly, so it looks as 
>>though that rebarbative syntax with all the backslashes is necessary. Sorry.
>>
>>regards
>>  Steve
> 
> 
> with regards to escaping data parameters I have found that I have to
> specifically add quotes to my strings for them to be understood by
> pstgresql. For example
> 
> ifs=open("binarydatafile","r")
> binarydata=ifs.read()
> stringdata=base64.encodestring(binarydata)
> 
> #does not work
> cursor.execute("insert into binarytable values(%s)" % stringdata)
> 
> #need to do this first
> newstringdata = "'" + stringdata + "'"
> 
> then the select statment works.
> Is this expected behavior? Is there a better way of doing this?
> 
> thanks for any insight

Yes, parameterize your queries. I assume you are using psycopg or 
something similar to create the database connection (i.e. I something 
that expects the "%s" parameter style - there are other options, but we 
needn't discuss them here).

The magic incantation you seek is:

cursor.execute("insert into binarytable values(%s)", (stringdata, ))

Note that here there are TWO arguments to the .execute() method. The 
first is a parameterized SQL statement, and the second is a tuple of 
data items, one for each parameter mark in the SQL.

Using this technique all necessary quoting (and even data conversion 
with a good database module) is performed inside the database driver, 
meaning  (among other things) that your program is no longer vulnerable 
to the dreaded SQL injection errors.

This is the technique I was hoping would work with the bytea datatype, 
but alas it doesn't. ISTM that PostgreSQL needs a bit of work there, 
even though it is otherwise a very polished product.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From bearophileHUGS at lycos.com  Wed Feb 22 09:32:24 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 22 Feb 2006 06:32:24 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com> <43fbc788@usenet01.boi.hp.com>
	<87u0ar3gba.fsf@wilson.homeunix.com>
	<pan.2006.02.22.11.35.14.90948@REMOVETHIScyber.com.au>
	<1140612537.685150.68330@o13g2000cwo.googlegroups.com>
	<7xu0arbkwd.fsf@ruckus.brouhaha.com>
	<mailman.2301.1140617846.27775.python-list@python.org>
Message-ID: <1140618744.177424.306320@g44g2000cwa.googlegroups.com>

Carl Friedrich Bolz:
> Indeed, there are similarities to pyrex. Of course in pyrex you have to
> give the types yourself, but since the type inference engine of PyPy can
> sometimes be hard to understand this is maybe not the worst trade-off.
> A nice advantage of the PyPy approach would be that you can test your
> RPython code by running it on top of CPython until it works and only
> then translating it into C. [...]
> But as I said, this is all pretty unclear at the moment

Maybe PyPy can be used to allow a better linking between interpreted
Python code and code compiled by ShedSkin.
SS contains a good type inferencer that maybe can be useful to compile
RPython too, aren't PyPy people interested in SS and its capabilities?

Bye,
bearophile



From martin.witte at gmail.com  Thu Feb 23 09:56:44 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 23 Feb 2006 06:56:44 -0800
Subject: Wierd Python error.
In-Reply-To: <mailman.2350.1140704418.27775.python-list@python.org>
References: <mailman.2350.1140704418.27775.python-list@python.org>
Message-ID: <1140706604.580760.18450@g14g2000cwa.googlegroups.com>

did you download the rpm from http://www.python.org/2.4/rpms.html? The
it runs as /usr/bin/python2.4 - see Q&A section on this page



From jimlewis at miclog.com  Sat Feb 11 08:25:41 2006
From: jimlewis at miclog.com (swisscheese)
Date: 11 Feb 2006 05:25:41 -0800
Subject: Shortest prime number program
In-Reply-To: <43EDE17F.7030000@v.loewis.de>
References: <1139652226.869102.310180@g14g2000cwa.googlegroups.com>
	<i_jHf.32$oj5.9305@news.siol.net>
	<1139660566.389036.166090@g14g2000cwa.googlegroups.com>
	<43EDE17F.7030000@v.loewis.de>
Message-ID: <1139664341.587464.78200@g44g2000cwa.googlegroups.com>

>You can save two bytes with

56 - nice catch.
55:
r=range(2,99)
[x for x in r if sum(x%d<1 for d in r)<2]



From crutcher at gmail.com  Sun Feb 26 14:39:41 2006
From: crutcher at gmail.com (Crutcher)
Date: 26 Feb 2006 11:39:41 -0800
Subject: How to use python regular expression to substitute string value
In-Reply-To: <1140982466.472084.150780@t39g2000cwt.googlegroups.com>
References: <1140978932.892295.322370@z34g2000cwc.googlegroups.com>
	<1140980529.969474.15430@t39g2000cwt.googlegroups.com>
	<1140982466.472084.150780@t39g2000cwt.googlegroups.com>
Message-ID: <1140982781.481543.275460@e56g2000cwe.googlegroups.com>

Are you sure node.data contains newlines?
You could try just:
print node.data
print node.data.split('\n')

This should give you an idea. From the interpreter:
>>> s = """
... abc
... def
... xyz"""
>>> s.split('\n')
['', 'abc', 'def', 'xyz']



From mathweijzen at home.nl  Sun Feb 26 14:03:52 2006
From: mathweijzen at home.nl (Math)
Date: Sun, 26 Feb 2006 20:03:52 +0100
Subject: Distutils Error while building 'win32com.client' extension
Message-ID: <002101c63b07$64401910$0202a8c0@uw403axvp2ndff>

Hello python people,

Can you help me out please.
I get the folllowing Error while trying to build a installer with the
Distutils module:
------------------------------------------------------------------------------------------------------------------------------------------
building 'win32com.client' extension....
'Python was built with version 7.1 of Visual Studio, and extensions need to
be built with the same version of the compiler, but it isn't installed.'
-------------------------------------------------------------------------------------------------------------------------------------------

I don't know which library to use so here's my setup.py :

from distutils.core import setup, Extension
setup(name='Marathon Manager',\
      version='0.1.0',\
      author='Math',\
      py_modules=['modMain','modWindows','modDialogs','modDataBase','ADOConstants'],\
      data_files=[('bitmaps', ['gif/schoen.bmp', 'if/run.jpg'])],\
      ext_modules=[Extension('win32com.client', ['pythoncom.lib'])])

Thank you all (Again :-))
Math 



From theller at python.net  Wed Feb  8 12:29:19 2006
From: theller at python.net (Thomas Heller)
Date: Wed, 08 Feb 2006 18:29:19 +0100
Subject: sys.path and unicode folder names
In-Reply-To: <43e99e5e@news.bezeqint.net> (Nir Aides's message of "Wed,
	08 Feb 2006 09:46:43 +0200")
References: <43e8c2ae$1@news.bezeqint.net>
	<43e8f3eb$0$7988$9b622d9e@news.freenet.de>
	<43e99e5e@news.bezeqint.net>
Message-ID: <d5hxlpxs.fsf@python.net>


>> Nir Aides wrote:
>>> Is there a solution or a work around for the sys.path problem with
>>> unicode folder names on Windows XP?
>>>
>>> I need to be able to import modules from a folder with a non-ascii name.

> Martin v. L?wis wrote:

>> If the name is restricted to the CP_ACP code page (i.e. more than
>> ASCII, less then full Unicode), using the "mbcs" encoding should work
>> fine.  Regards, Martin

Nir Aides:
> I can not restrict the name to CP_ACP.
> I am interested in the general case of Unicode.
> Windows XP is a native Unicode OS.

Python internally converts unicode entries on sys.path to strings before
using them.  Changing that would require a large rewrite of the import
machinery.  I once started to work on a patch, but got ZERO feedback, so
I gave up.

Thomas




From fredrik at pythonware.com  Wed Feb 15 10:27:23 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 15 Feb 2006 16:27:23 +0100
Subject: Encryption application/NEED A HACKER TO TRY IT
References: <cda778180602150718o325826a6ga658b31339aa82d4@mail.gmail.com>
Message-ID: <dsvh8t$rb8$1@sea.gmane.org>

"atanas Cosmas Nkelame" <atanasy at gmail.com> wrote:


> I'm putting here the 'encoded' text for someone to try to encipher the text
> or tell me what is the chance that one can encipher the text.
>
>
> Here we go..
>
> .>. 3;0.$0.8:;07&:00: 07&.>..&;.$> 9::.$0. .&;..9>.;.$0.3;0 ;...$0.3;0
> 9::.$0. 3;014>.>.9::$> .;>..$0..$0.:00: >6..12>9::;...$0..9>.;
> :->.$0.:00:$>.
>
> :-><.>.9>.; ;>.$0..9$$>.$0..9>.;$> ;..$>07&>6.

related:

    http://www.faqs.org/faqs/cryptography-faq/part02/

    2.3. How do I present a new encryption scheme in sci.crypt?

    "I just came up with this neat method of encryption. Here's some
    ciphertext: FHDSIJOYW^&%$*#@OGBUJHKFSYUIRE. Is it strong?'' Without a
    doubt questions like this are the most annoying traffic on sci.crypt.

    If you have come up with an encryption scheme, providing some
    ciphertext from it is not adequate. Nobody has ever been impressed by
    random gibberish. Any new algorithm should be secure even if the
    opponent knows the full algorithm (including how any message key is
    distributed) and only the private key is kept secret. There are some
    systematic and unsystematic ways to take reasonably long ciphertexts
    and decrypt them even without prior knowledge of the algorithm, but
    this is a time-consuming and possibly fruitless exercise which most
    sci.crypt readers won't bother with.

    /.../

</F>





From paul at boddie.org.uk  Thu Feb 16 16:44:38 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 16 Feb 2006 13:44:38 -0800
Subject: embedding python in HTML
References: <GD5Jf.1637$No6.38292@news.tufts.edu>
	<t6q9v1p2qcr0ntsau8i6q5glk89pfb4epq@4ax.com>
Message-ID: <1140126278.861329.162110@z14g2000cwz.googlegroups.com>

Rene Pijlman wrote:
> John Salerno:
> [Python alternative for PHP]
> >So to do this with Python, do I simply integrate it into the HTML as
> >above, with no extra steps?
>
> You'd need something like the PHP engine, that understands Python rather
> than PHP.

[...]

> There's also PSP:
> http://www.ciobriefings.com/psp/

For "straight Python Server Pages" without advertising various (and
possibly quite different) technologies, take a look at mod_python's
implementation:

http://www.modpython.org/
http://www.modpython.org/live/current/doc-html/pyapi-psp.html

I haven't actually used this particular implementation - I'm not a fan
of embedding programming languages in HTML - but I imagine that it's
one of the more actively developed projects of its kind.

Paul



From lashkariNO at SPAMworldviz.com  Thu Feb 16 12:40:15 2006
From: lashkariNO at SPAMworldviz.com (Farshid Lashkari)
Date: Thu, 16 Feb 2006 09:40:15 -0800
Subject: Is empty string cached?
In-Reply-To: <mailman.2007.1140100769.27775.python-list@python.org>
References: <cUMIf.11894$MJ.4803@fed1read07>	<mailman.1981.1140057796.27775.python-list@python.org>	<tgSIf.12036$MJ.8017@fed1read07>
	<mailman.2007.1140100769.27775.python-list@python.org>
Message-ID: <wN2Jf.12082$MJ.5064@fed1read07>

> A few comments (which I hope are correct, but which I hope you will read 
> then mostly ignore since you probably shouldn't be designing based on 
> this stuff anyway):

Thanks for the info Peter. My original question wasn't due to any 
observed performance problems. I was just being curious :)

-Farshid


From pparkkin at gmail.com  Mon Feb  6 13:21:45 2006
From: pparkkin at gmail.com (enjoying the view)
Date: 6 Feb 2006 10:21:45 -0800
Subject: a question regarding call-by-reference
Message-ID: <1139250105.744691.110440@o13g2000cwo.googlegroups.com>

I am working on a school project, trying to build a simple RPC stub
generator. The idea is that the generator takes a normal python file
with functions defined in it and produces a client and server stub. The
client stub has the same functions defined, but they just connect to
the server and ask it to call the desired functions. The server stub is
a server listening for incoming requests and dispatching them to the
appropriate functions and sending back the results. Extremely simple
and I've gotten it to mostly work, but I have one problem:
call-by-reference parameters. An example:

A function like this:
def sum(a, b):
  return a + b

would yield a client stub like this (simplified):
def sum(a, b):
   send_message({'funcname': 'sum', 'args': (a, b)})
   result = receive_message()
   return result

Now, this works just fine. I get problems when I try to do something
like this:
def add_elm(list):
   list.append('elm')
   return

Imported normally this would work fine. The list given as a parameter
would be one element larger. But when the stubs are generated, the
function doesn't return anything and the list is appended in the server
and the client-side list is left untouched. At first I thought the
solution was easy, just return the changed parameters and place them in
the parameter variables in the client stub:
def add_elm(list):
   send_message({'funcname': 'add_elm', 'args': (list)})
   response = receive_message()
   (list) = response.get('args')
   return response.get('result')

The problem is, this doesn't work. The original list doesn't point to
the changed list. I have been trying to figure this out and it seems
that if I just assign to the list variable it just modifies the local
(to the function) name space, and that those changes aren't reflected
in the list in the original name space.

I believe there are some ways around this, but I haven't found one that
would not require any special handling in either the code calling the
client stub or the original functions. I want to maintain transparency.

etv



From reply.in.the.newsgroup at my.address.is.invalid  Tue Feb 14 06:47:54 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Tue, 14 Feb 2006 12:47:54 +0100
Subject: is socket thread safe?
References: <1139912679.559724.131020@f14g2000cwb.googlegroups.com>
Message-ID: <cog3v190fgpu1gdcs21afp7roo968q9o4n@4ax.com>

e2wugui at gmail.com:
>[code]

I certainly expect socket to be threadsafe. I use it (via urllib2/httplib)
in a multithreaded program, that runs fine with Python 2.3 and 2.4 on both
Windows XP and Linux.

-- 
Ren? Pijlman


From sjdevnull at yahoo.com  Thu Feb  9 19:17:45 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 9 Feb 2006 16:17:45 -0800
Subject: Determining an operating system's default browser
In-Reply-To: <43EBD5E1.1040501@websafe.com>
References: <mailman.1690.1139528346.27775.python-list@python.org>
	<43EBD5E1.1040501@websafe.com>
Message-ID: <1139530665.890855.214150@g44g2000cwa.googlegroups.com>

Larry Bates wrote:
> You don't have to determine it.  Just os.startfile('page1.html')
> and let the OS figure it out.

Note that this only works on Windows.



From lycka at carmen.se  Mon Feb 27 12:58:45 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Mon, 27 Feb 2006 18:58:45 +0100
Subject: ls files --> list packer
In-Reply-To: <1140812071.998261.92610@i40g2000cwc.googlegroups.com>
References: <1140765792.864556.289820@i40g2000cwc.googlegroups.com>
	<1140767111.490691.42460@e56g2000cwe.googlegroups.com>
	<1140768527.006363.29050@i39g2000cwa.googlegroups.com>
	<dtmo3g$jg5$1@wake.carmen.se>
	<1140812071.998261.92610@i40g2000cwc.googlegroups.com>
Message-ID: <dtvekm$blc$1@wake.carmen.se>

kpp9c wrote:
> that is nice.... but the little further wrinkle, which i have no idea
> how to do, would be to have the contents of each directory packed into
> a different list.... since you have no idea before hand how many lists
> you will need (how many subdirs you will enounter)  ... well that is
> where the hairy part comes in...

What's the problem? If you'll get an unknown bundle of objects in a
program, you just put them in a container. A list or a dict will do
fine. Have a look at the Python tutorial.

You get a file list for each directory from os.walk. You either keep
a list called "directories" and for each turn in the loop, you do
"directories.append((dir, sound_files))", or you have a dict called
"directories", and do "directories[dir] = sound_files" in the loop.

Something like this untested code:

def isSoundFile(x):
    # home work

dirs = {}
root = raw_input('start directory')
for dir, dummy, files in os.walk(root):
     dirs[dir] = [x for x in files if isSoundFile(x)]

for dir in sorted(dirs):
     print dir
     for fn in dirs[dir]:
         print "\t", fn
     print


From durumdara at gmail.com  Tue Feb 21 04:14:11 2006
From: durumdara at gmail.com (Durumdara)
Date: Tue, 21 Feb 2006 10:14:11 +0100
Subject: Little tool - but very big size... :-(
Message-ID: <43FAD9E3.5010004@gmail.com>

Hi !

I have a problem.
I have a little tool that can get data about filesystems and wrote it in
python.

The main user asked me a GUI for this software.

This user is needed a portable program, so I create this kind of the
software with Py2Exe.

But it have very big size: 11 MB... :-(

The dist directory:
2006.02.21.  10:09    <DIR>          .
2006.02.21.  10:09    <DIR>          ..
2005.09.28.  12:41            77 824 bz2.pyd
2006.02.21.  10:09                 0 dirlist.txt
2006.02.20.  12:51           611 384 library.zip
2006.02.15.  16:22            23 558 main.ico
2004.12.16.  17:22           348 160 MSVCR71.dll
2005.09.28.  12:41         1 867 776 python24.dll
2006.01.11.  12:19           102 400 pywintypes24.dll
2005.09.28.  12:41           405 504 unicodedata.pyd
2005.09.28.  12:41             4 608 w9xpopen.exe
2006.01.11.  12:19            73 728 win32api.pyd
2006.01.11.  12:20            81 920 win32file.pyd
2006.01.11.  12:26           106 496 win32security.pyd
2006.01.10.  19:09         4 943 872 wxmsw26uh_vc.dll
2006.02.20.  12:51            40 960 wxPyHDDirList.exe
2005.09.28.  12:41            69 632 zlib.pyd
2006.01.10.  19:13           626 688 _controls_.pyd
2006.01.10.  19:12           696 320 _core_.pyd
2006.01.10.  19:13           364 544 _gdi_.pyd
2006.01.10.  19:13           491 520 _misc_.pyd
2006.01.10.  19:13           548 864 _windows_.pyd
              20 file        11 485 758 byte

I need to have more compressed result. Can I compress dll-s, pyd-s with
Py2Exe ?
Can I decrease the total size with something ?

If not, how to I create an self-unpackager and self-starter program that
use an temporary directory in the disk ? With WinRar ?

Thanx for help:
dd





From gaz082 at gmail.com  Tue Feb 21 10:08:10 2006
From: gaz082 at gmail.com (Gaz)
Date: 21 Feb 2006 07:08:10 -0800
Subject: No
Message-ID: <1140534490.873612.64280@g47g2000cwa.googlegroups.com>

Check this piece of code:

    #now add an image part
    part = writer.nextpart()
    part.addheader('Content-Transfer-Encoding', 'base64')
    body = part.startbody('image/jpeg')
    base64.encode(open('c:\check.jpg', 'rb'), body)

I get the following error:

IOError: [Errno 2] No such file or directory: 'c:\\check.jpg'
      args = (2, 'No such file or directory')
      errno = 2
      filename = r'c:\check.jpg'
      strerror = 'No such file or directory'

Dont know why im getting such error, the file is there. Perhaps wrong
filetype? Wrong read mode?



From zevlg at yandex.ru  Sun Feb 26 14:45:13 2006
From: zevlg at yandex.ru (Zajcev Evgeny)
Date: Sun, 26 Feb 2006 22:45:13 +0300
Subject: An isalpha() that accepts underscores as well
References: <1140875695.053987.158710@t39g2000cwt.googlegroups.com>
	<cone.1140889811.930498.40672.5001@35st-server.simplicato.com>
	<mailman.2449.1140979860.27775.python-list@python.org>
	<87bqwtor98.fsf@yandex.ru>
	<1140982340.006483.245000@e56g2000cwe.googlegroups.com>
Message-ID: <877j7hoqeu.fsf@yandex.ru>

"Fuzzyman" <fuzzyman at gmail.com> writes:

> Zajcev Evgeny wrote:
>> egbert <egbert.bouwman at hccnet.nl> writes:
>>
>> > The string method isalpha() returns True when all characters in the
>> > string are alphabetic. Unfortunately the underscore is not alphabetic.
>> > A function that does what I need is:
>> >
>> > def alfa_(w):
>> >     return "".join(w.split("_")).isalpha()
>> >
>> > but for the kind of strings that I have this is about ten times
>> > slower than isalpha() sec. Any suggestions ?
>> > Thanks.
>>
>> what about
>>
>>     def alfa_(w):
>>         return w.isalpha() or w.find('_') != -1
>>
>
> That returns True if 'w' contains an underscore. The spec is to return
> True if 'w' contains *only* alphaebtical characters and '_'.
>

true, my fault :-< !

> alfa('%^_*&')
>
> would return True here.
>
>> ? but yes it does scan `w' twice ..
>>
>> You could also do something like:
>>
>>     def alfa_(w):
>>         for c in w:
>>             if not c.isalpha() and not c == '_':
>>                return False
>>         return True
>>
>
> Part of the problem is that the string method 'isalpha' is implemented
> in C, and so will be  quicker than any pure Python alternative.
>

I've been suspecting this ..

> The following will work, and probably only be twice as slow as
> 'isalpha'  :-) :
>
> def alfa(w):
>    return w.replace('_', '').isalpha()

Yeah, great performance indeed, thanks!

-- 
lg


From enterr at gmail.com  Wed Feb 15 16:21:28 2006
From: enterr at gmail.com (Atanas Banov)
Date: 15 Feb 2006 13:21:28 -0800
Subject: Embedding an Application in a Web browser
References: <1139930045.408507.151440@g43g2000cwa.googlegroups.com>
	<1140004056.893486.291280@g44g2000cwa.googlegroups.com>
	<1140005817.698597.135220@z14g2000cwz.googlegroups.com>
Message-ID: <1140038488.546531.63630@z14g2000cwz.googlegroups.com>

paron wrote:
> I forgot -- I like the idea of Kerrigell, too. It runs on top of
> CherryPy, and lets you use python either in the server (which is just a
> little program on your local machine) or embedded in the html pages, or
> in a Kerrigell service, which is an application server based on Python.

oh sure, why make it simple, when we can make it difficult?!
your solution is like using a sledgehammer to crack a nut!

"... I keep hearing the sound of nuts being pulverized..."
http://www.bobcongdon.net/blog/2005/11/java-sledgehammer.html



From fakeaddress at nowhere.org  Thu Feb  9 20:16:56 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Fri, 10 Feb 2006 01:16:56 GMT
Subject: Question about idioms for clearing a list
In-Reply-To: <dsfej3$1i6$1@wake.carmen.se>
References: <mailman.1294.1138727665.27775.python-list@python.org>	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>	<mailman.1489.1139232969.27775.python-list@python.org>	<ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>	<mailman.1537.1139297533.27775.python-list@python.org>	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>	<mailman.1546.1139320907.27775.python-list@python.org>	<dscdtr$ciu$1@wake.carmen.se>
	<mailman.1594.1139403378.27775.python-list@python.org>
	<dsd311$qlp$1@wake.carmen.se>
	<ZatGf.28418$F_3.14242@newssvr29.news.prodigy.net>
	<dsfej3$1i6$1@wake.carmen.se>
Message-ID: <cQRGf.54501$PL5.14689@newssvr11.news.prodigy.com>

Magnus Lycka wrote:
> Bryan Olson wrote:
> 
>> The original question was about idioms and understanding, but
>> there's more to the case for list.clear. Python is "duck typed".
>> Consistency is the key to polymorphism: type X will work as an
>> actual parameter if and only if X has the required methods and
>> they do the expected things.
>>
>> Emptying out a collection is logically the same thing whether
>> that collection is a list, set, dictionary, or user-defined
>> SortedBag.  When different types can support the same operation,
>> they should also support the same interface. That's what
>> enables polymorphism.
> 
> 
> I agree that emptying is logically the same thing for all of these
> types. Beyond that, they don't seem to have a lot in common. It's
> quite possible to support a duck typing approach that works for all
> sorts of sequences, but it's fairly meaningless to use ducktyping
> for conceptually different types such as dicts, lists and sets.
> 
> Do you really have a usecase for this? It seems to me that your
> argument is pretty hollow.

Sure:

     if item_triggering_end in collection:
         handle_end(whatever)
         collection.clear()


Or maybe moving everything from several collections into
a single union:

     big_union = set()
     for collection in some_iter:
         big_union.update(t)
         collection.clear()



[...]
> As far as I understand, the only operation which is currently used
> by all three collections is .pop, but that takes a different number
> or parameters, since these collections are conceptually different!

The all support len, iteration, and membership test.

Many algorithms make sense for either sets or lists. Even if they
cannot work on every type of collection, that's no reason not
to help them be as general as logic allows.



-- 
--Bryan


From donn at u.washington.edu  Wed Feb  1 15:31:46 2006
From: donn at u.washington.edu (Donn Cave)
Date: Wed, 01 Feb 2006 12:31:46 -0800
Subject: Python vs C for a mail server
References: <mailman.3994.1138546139.27774.python-list@python.org>
	<mailman.1197.1138549204.27775.python-list@python.org>
	<1138728303.669646.36940@g49g2000cwa.googlegroups.com>
	<drqa42$8k8$1@wake.carmen.se>
	<1138805854.533303.279610@g49g2000cwa.googlegroups.com>
	<donn-FA6F36.09312101022006@gnus01.u.washington.edu>
	<1138819666.521465.108000@o13g2000cwo.googlegroups.com>
Message-ID: <donn-2C0A25.12314601022006@gnus01.u.washington.edu>

In article <1138819666.521465.108000 at o13g2000cwo.googlegroups.com>,
 "Randall Parker" <techiepundit at futurepundit.com> wrote:
...
> More generally: One must keep in mind that advantages and disadvantages
> of specific implementations of language concepts are not always
> indications of flaws in those concepts.

Sure.  And of course, the nominal topic wasn't really the
concepts, but more about two actual languages, so in that
respect my point was a little off base - it's only germane
to the little religious war that usually comes along at
this point.  The endlessly rehashed arguments in that context
should be about whether you can test everything, whether
types convey semantics, etc.  Let us forget about whether
explicit typing is too much overhead, since it isn't required
in principle.

   Donn Cave, donn at u.washington.edu


From enterr at gmail.com  Mon Feb 20 14:50:47 2006
From: enterr at gmail.com (Atanas Banov)
Date: 20 Feb 2006 11:50:47 -0800
Subject: why does close() fail miserably on popen with exit code -1 ?!
In-Reply-To: <jh8jv1tnj7pde63bomimldoh9me6io9a63@4ax.com>
References: <1140416836.030294.289800@f14g2000cwb.googlegroups.com>
	<jh8jv1tnj7pde63bomimldoh9me6io9a63@4ax.com>
Message-ID: <1140465047.381586.224530@g47g2000cwa.googlegroups.com>


my gripe is about exit with MINUS ONE, not +1. see my post again.

yes, i know one cannot return -1 in unix (since returned value is
exitcode % 256 * 256), and no, i am not interested in unix behavior.

Rene Pijlman wrote:
> Atanas Banov:
> >i ran onto this weirdness today: seems like close() on popen-ed
> >(pseudo)file fails miserably with exception instead of returning exit
> >code, when said exit code is -1.
>
> Not here.
>
> Python 2.4.2 (#67, Sep 28 2005, 12:41:11) [MSC v.1310 32 bit (Intel)]
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import os
> >>> print os.popen('exit 1').close()
> 1



From sean at buildingonline.com  Thu Feb 16 15:51:24 2006
From: sean at buildingonline.com (SMB)
Date: Thu, 16 Feb 2006 12:51:24 -0800
Subject: Merging two lists of data (Pythonic way)
References: <8k5Jf.27896$sA3.57@fed1read02>
	<1140122391.823206.74580@g14g2000cwa.googlegroups.com>
Message-ID: <qD5Jf.27899$sA3.5853@fed1read02>


"Jonathan Gardner" <jgardner at jonathangardner.net> wrote in message 
news:1140122391.823206.74580 at g14g2000cwa.googlegroups.com...
> codes = map(lambda x: x[0], list1)
> for d in list2:
>  if d['code'] in codes:
>    d['VERIFIED'] = 1
>
> Is this what you were looking for?
>

That is exactly what I was looking for.  I will have to take a look at map.

Thank you very much 




From m_massala at hotmail.com  Thu Feb 23 08:51:30 2006
From: m_massala at hotmail.com (Mimi)
Date: 23 Feb 2006 05:51:30 -0800
Subject: pyserial
Message-ID: <1140702690.396244.142370@g43g2000cwa.googlegroups.com>

Hi,
I use the pyserial to read data from a serial port.
My code is in window Xp and python 2.4. when I use Hyperteminal I can
read data without try and try again that it is not the case with
pyserial library.
anyone can help me ?
this is a part of my code:

self.ser = serial.Serial()
    self.ser.baudrate = 9600
            self.ser.port = 3
            self.ser.timeout= 10
            self.ser.bytesize = serial.EIGHTBITS
            self.ser.stopbits = serial.STOPBITS_ONE
            self.ser.xonxoff = 0

   nbHisto = 144
   for i in range(0,nbHisto):
                while 1:
                    print self.ser.flushInput()
                    print self.ser.flushOutput()
                    cmd = "%xs\r" %(i+1)
                    self.ser.write("%s" %cmd)

                    #print cmd

                    histo = self.ser.readlines()
                    #print histo
                    if histo:
                        if histo=="\r\n":
                            pass
                        else:

                            histoAdresse = int(histo[0].strip('\r\n'))
                            print histoAdresse

                            try:
                                dateHisto_cur = listeFenetreNonNul["%s"
%(histoAdresse)]
                                print dateHisto_cur


self.ecrireHistoDansFic(histo,histoAdresse,dateHisto_cur,histoAdresse,i)
                                break
                            except:

                                print "Adresse pas trouvee dans le
systeme %s" %(histoAdresse)
                                break
                    # End if

                    sleep(10)
                # End while
            #End for

            
            self.ser.close()



From kp8 at mac.com  Fri Feb 24 03:18:12 2006
From: kp8 at mac.com (kpp9c)
Date: 24 Feb 2006 00:18:12 -0800
Subject: ls files --> list packer
In-Reply-To: <1140768527.006363.29050@i39g2000cwa.googlegroups.com>
References: <1140765792.864556.289820@i40g2000cwc.googlegroups.com>
	<1140767111.490691.42460@e56g2000cwe.googlegroups.com>
	<1140768527.006363.29050@i39g2000cwa.googlegroups.com>
Message-ID: <1140769092.801279.181970@p10g2000cwp.googlegroups.com>

gosh i could even use other string methods like startswith to take all
the files in a given directory which i have organized with a prefix and
have them stuffed in different lists  ... i think ...

snd_filelist = [f for f in os.listdir('/Users/foo/snd') if
f.endswith('.aif') & f.startswith('r')]

\m/ (>.<) \m/

yeah!

runnin' to the interpreta now...



From jstroud at ucla.edu  Thu Feb 23 16:10:36 2006
From: jstroud at ucla.edu (James Stroud)
Date: Thu, 23 Feb 2006 13:10:36 -0800
Subject: problem with newlines in regexp substitution
In-Reply-To: <mailman.2359.1140714959.27775.python-list@python.org>
References: <mailman.2359.1140714959.27775.python-list@python.org>
Message-ID: <dtl8cc$9dn$1@daisy.noc.ucla.edu>

Florian Schulze wrote:
> See the following results:
> 
> Python 2.3.5 (#62, Feb  8 2005, 16:23:02) [MSC v.1200 32 bit (Intel)] on 
> win32
> Type "help", "copyright", "credits" or "license" for more information.
> 
>>>> import re
>>>> s = "1"
>>>> re.sub('1','\\n',s)
> 
> '\n'
> 
>>>> '\\n'
> 
> '\\n'
> 
>>>> re.sub('1',r'\\n',s)
> 
> '\\n'
> 
>>>> s.replace('1','\\n')
> 
> '\\n'
> 
>>>> repl = '\\n'
>>>> re.sub('1',repl,s)
> 
> '\n'
> 
>>>> s.replace('1',repl)
> 
> '\\n'
> 
> Why is the behaviour of the regexp substitution so weird and can I 
> prevent that? It breaks my asumptions and thus my code.
> 
> Regards,
> Florian Schulze
> 

"Why" questions are always tough to answer. E.g.: Why are we here?

The answer to "what is happening" is much easier. Strings passed to the 
regex engine are processed first, so escapes must be escaped. This is 
why raw strings were invented. If it weren't for these, I'd still be 
using perl. In raw strings, as you have noticed, a '\' is already 
escaped. In the olden days, you'd have to type "\\\\" to mean a literal 
backslash, so creating a literal backslash in a regex that produced a 
string that would then itself be used in a regex would be 
'\\\\\\\\\\\\\\\\', which scared me away from Python for a couple of 
years (rmember, the final printed product would be '\').

That patently doesn't answer your question, but here is something to ponder:

py> s.replace('1',repl)[0]
'\\'
py> print s.replace('1',repl)
\n

James


From mac at calmar.ws  Sun Feb 19 06:29:06 2006
From: mac at calmar.ws (calmar)
Date: Sun, 19 Feb 2006 12:29:06 +0100
Subject: general coding issues - coding style...
References: <slrndve8oe.5jb.mac@news.calmar.ws>
	<slrndvelkv.nrn.mac@news.calmar.ws>
	<1140305704.970072.177040@g14g2000cwa.googlegroups.com>
	<1140306657.428960.233930@g14g2000cwa.googlegroups.com>
Message-ID: <slrndvglk2.t5c.mac@news.calmar.ws>

On 2006-02-18, Justin  Azoff <justin.azoff at gmail.com> wrote:

Hi all,

> Dylan Moreland wrote:
>> I would look into one of the many Vim scripts which automatically fold
>> most large blocks without the ugly {{{.
>
> Who needs a script?
> "set foldmethod=indent"
> works pretty well for most python programs.
>

Well, foldmethod=marker does not bother me, because the folds are
normally closed. With markers, it takes one line per function, with
indent I see 2, so I prefer markers.

..and since I can easily get rid of them, and add them again, I will at
least remove them before e.g. putting to the web or so.


Cheers and thanks,
calmar



-- 
  calmar

          (o_  It rocks: LINUX + Command-Line-Interface
          //\
          V_/_                     http://www.calmar.ws


From deets at nospam.web.de  Thu Feb 23 05:57:32 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 23 Feb 2006 11:57:32 +0100
Subject: make a class instance from a string ?
References: <mailman.1955.1140018042.27775.python-announce-list@python.org>
	<mailman.2340.1140687820.27775.python-list@python.org>
Message-ID: <465iskF9k6spU1@uni-berlin.de>

Bo Yang wrote:

> Hi,
> I know in java , we can use
> 
> class.ForName("classname")
> 
> 
> to get an instance of the class 'classname' from a
> string , in python , how do I do that ?

You can use

  getattr(module, classname)(*arguments)


Diez




From nszabolcs at gmail.com  Mon Feb 13 14:04:42 2006
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 13 Feb 2006 11:04:42 -0800
Subject: Location of Python modules
In-Reply-To: <1139856376.208422.182090@f14g2000cwb.googlegroups.com>
References: <1139854184.504114.46690@z14g2000cwz.googlegroups.com>
	<1139854642.175799.165950@g43g2000cwa.googlegroups.com>
	<1139854910.669876.84730@o13g2000cwo.googlegroups.com>
	<43F0D1A7.8000501@v.loewis.de>
	<1139856376.208422.182090@f14g2000cwb.googlegroups.com>
Message-ID: <1139857482.644028.272380@o13g2000cwo.googlegroups.com>

LOL

a .py program is a module, you can import it:
if it is in the sys.path (import modulename).
if it sits in a directory that is in the sys.path and the directory
also has a __init__.py file (import dirname.modulename / from dirname
import modulname).
if there is a modulename.pth file in the sys.path containing the path
to your .py file.
(the current dir is always in the sys.path).

if you want to install your module (copy it under the site-packages
dir), then you should use distutils module and create a setup.py script

the compiled bytecode (.pyc file) is always automatically generated



From tzellman at gmail.com  Wed Feb 15 11:52:23 2006
From: tzellman at gmail.com (tzellman at gmail.com)
Date: 15 Feb 2006 08:52:23 -0800
Subject: kwargs keyword evaluation
In-Reply-To: <1140021611.026892.85790@f14g2000cwb.googlegroups.com>
References: <1140021611.026892.85790@f14g2000cwb.googlegroups.com>
Message-ID: <1140022343.157921.35180@o13g2000cwo.googlegroups.com>

Well, I knew about the apply() function, but totally forgot to use it.
It worked.

Example:
apply(function_call, (), {keyword: "Tom"})



From jeff at schwabcenter.com  Thu Feb 23 19:24:25 2006
From: jeff at schwabcenter.com (Jeffrey Schwab)
Date: Fri, 24 Feb 2006 00:24:25 GMT
Subject: "Temporary" Variable
In-Reply-To: <pan.2006.02.23.22.19.38.642977@REMOVETHIScyber.com.au>
References: <1140665472.203495.7570@g44g2000cwa.googlegroups.com>
	<43FD6645.3020201@REMOVEMEcyber.com.au>
	<1140725159.143882.202630@j33g2000cwa.googlegroups.com>
	<pan.2006.02.23.22.19.38.642977@REMOVETHIScyber.com.au>
Message-ID: <ZmsLf.21067$915.1256@southeast.rr.com>

Steven D'Aprano wrote:
> On Thu, 23 Feb 2006 12:05:59 -0800, darthbob88 wrote:
> 
> My comments inserted inline.
> 
> 
> 
>>#!/usr/bin/python
>>#simple guessing game, with numbers
>>import random
>>spam = random.randint(1, 100)
> 
> 
> It is bad programming practice to give variables uninformative joke names.

Lighten up.  This isn't the middle of a 100-KLOC corporate monstrosity, 
it's a 1/2-page usenet post.


From dprovins at rpcl.com  Wed Feb 22 14:00:38 2006
From: dprovins at rpcl.com (Dean Allen Provins)
Date: Wed, 22 Feb 2006 19:00:38 GMT
Subject: Tkinter canvas size determination
In-Reply-To: <lvjuc3-ph7.ln1@lairds.us>
References: <43FC9532.2050800@rpcl.com> <lvjuc3-ph7.ln1@lairds.us>
Message-ID: <qx2Lf.9367$Y22.5701@clgrps12>

Cameron Laird wrote:
> In article <43FC9532.2050800 at rpcl.com>,
> Dean Allen Provins  <dprovins at rpcl.com> wrote:
> 
>>I need to determine the size of a canvas while the process is running.
>>Does anyone know of a technique that will let me do that?
> 
> 			.
> 			.
> 			.
> Does
>   >>> import Tkinter
>   >>> c = Tkinter.Canvas()
>   >>> c.create_oval(13, 51, 80, 130)
>   1
>   >>> c.pack()
>   >>> print c.cget("width")
>   284
> help?
> 
> There are actually several different notions of the size of a
> canvas.  The example abovve should be a good starting point,
> though.  
> 
> There's also a mailing list specifically for Tkinter <URL:
> http://tkinter.unpythonic.net/wiki/mailing_20lists  >; that
> might interest you.

Your suggestion helps immensely.  I missed it in Shipman's Tkinter
reference.  And thank you for the mail list reference.  I'll pursue it.

Regards,

Dean


From xavier.morel at masklinn.net  Tue Feb  7 17:35:52 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Tue, 07 Feb 2006 23:35:52 +0100
Subject: tricky regular expressions
In-Reply-To: <1139349420.713243.271570@z14g2000cwz.googlegroups.com>
References: <1139343779.721205.221410@f14g2000cwb.googlegroups.com>
	<dsb3gd$d5o$1@apollon.grec.isp.9tel.net>
	<1139349420.713243.271570@z14g2000cwz.googlegroups.com>
Message-ID: <dsb77h$m9n$1@aphrodite.grec.isp.9tel.net>

Ernesto wrote:
> Xavier Morel wrote:
>> Ernesto wrote:
>>> I'm not sure if I should use RE's or some other mechanism.  Thanks
>>>
>> I think a line-based state machine parser could be a better idea. Much
>> simpler to build and debug if not faster to execute.
> 
> What is a line-based state machine ?
> 
Parse your file line-by-line (since it seems that it's the way your data 
is organized).

Keep state informations somewhere.

Change your state based on the current state and the data being fed to 
your parser.

For example, here you basically have 3 states:

No Title, which is the initial state of the machine (it has not 
encountered any title yet, and you do stuff based on titles)

Title loaded, when you've met a title. "Title loaded" loops on itself: 
if you meet a "Title: whatever" line, you change the title currently 
stored  but you stay in the "Title loaded" state (you change the current 
state of the machine from "title loaded" to "title loaded").

Request loaded, which can be reached only when you're in the "Title 
loaded", and then encounter a line starting with "Request: ". When you 
reach that stage, do your processing (you have a title loaded, which is 
the latest title you encountered, and you have a request loaded, which 
is the request that immediately follows the loaded title), then you go 
back to the "No Title" state, since you've processed (and therefore 
unloaded) the current title.

So, the state diagram could kind of look like that:
(it's supposed to be a single state diagram, but i suck at ascii 
diagrams so i'll create one mini-diagram for each state)

NoTitle =0> TitleLoaded

=0>
Event: on encountering a line starting with "Title: "
Action: save the title (to whatever variable you see fit)
Change state to: TitleLoaded


TitleLoaded =1> TitleLoaded
     ||
     2
     \/
Request

=1>
Event: on encountering a line starting with "Title: "
Action: save the title (replace the current value of your title variable)
Change state to: TitleLoaded

=2>
Event: on encountering a line starting with "Request: "
Action: save the request?; immediately process the Request state
Change state to: Request


Request =3> NoTitle
   ||
   4
   \/
TitleLoaded

=3>
Event: the Request state is reached, the request is either "Play" or "Next"
Action: Do whatever you want to do; nuke the content of the title variable
Change state to: NoTitle

=4>
Event: the Request state is reached, the request is neither "Play" nor 
"Next"
Action: Nuke the content of the request variable (if you saved it), do 
nothing else
Change state to: TitleLoaded

As a final note, i'd recommend reading "Text Processing in Python", even 
though it puts a quite big emphasis on functional programming (which you 
may or may not appreciate), it's an extremely good initiation to 
text-files handling, parsing and processing.


From roy at panix.com  Tue Feb 28 21:53:01 2006
From: roy at panix.com (Roy Smith)
Date: Tue, 28 Feb 2006 21:53:01 -0500
Subject: Use empty string for self
References: <1141170846.619246.163470@t39g2000cwt.googlegroups.com>
	<mailman.2547.1141181064.27775.python-list@python.org>
Message-ID: <roy-43BBEF.21530028022006@reader2.panix.com>

Terry Hancock <hancock at anansispaceworks.com> wrote:
> However, there is a slightly less onerous method which
> is perfectly legit in present Python -- just use "s"
> for "self":

This is being different for the sake of being different.  Everybody *knows* 
what self means.  If you write your code with s instead of self, it just 
makes it that much harder for other people to understand it.


From tim.peters at gmail.com  Fri Feb 17 12:09:48 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Fri, 17 Feb 2006 12:09:48 -0500
Subject: Queue.Queue()
In-Reply-To: <20060217013611.36523.qmail@web36710.mail.mud.yahoo.com>
References: <20060217013611.36523.qmail@web36710.mail.mud.yahoo.com>
Message-ID: <1f7befae0602170909q128684a6m43f2cd0e1a4cb4e8@mail.gmail.com>

[john peter]
>  what happens behind the scenes when i create a Queue.Queue() without
> specifying a maxsize?  does a block of space gets allocated initially then
> dynamically "expanded" as needed?

Yes.

> if so, what is the default size of the initial space?

It's initially empty.

> is it always better to specify a big enough maxsize

No.

> initially for efficiency purposes,

The intent has nothing to do with efficiency:  bounded and unbounded
queues are _semantic_ variations.  They can behave differently. 
Whether you want a bounded or unbounded queue depends on the needs of
your app.  A bounded queue is typically used, e.g., to mediate between
producers and consumers with different processing rates.

> or does it matter much?

Shouldn't matter at all.  Even if you specify a max size, the
underlying container still starts its life empty, and grows and
shrinks as needed.  The semantic difference is in whether a .put()
attempt may block.


From nszabolcs at gmail.com  Mon Feb 13 13:11:11 2006
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 13 Feb 2006 10:11:11 -0800
Subject: Encoding
In-Reply-To: <1139853781.611888.60230@g44g2000cwa.googlegroups.com>
References: <1139853781.611888.60230@g44g2000cwa.googlegroups.com>
Message-ID: <1139854271.073914.37950@o13g2000cwo.googlegroups.com>

what about params='some data'.decode('utf8').encode('1250') ?



From srikar2097 at gmail.com  Wed Feb 22 04:54:52 2006
From: srikar2097 at gmail.com (sri2097)
Date: 22 Feb 2006 01:54:52 -0800
Subject: cookielib
Message-ID: <1140602092.438615.69450@f14g2000cwb.googlegroups.com>

Hi, I need to get to a particular page in a website. The site uses
cookeis and naturally I had to use cookielib since urllib2 does not
support cookies. But even after adding the cookies to the headers, I
keep getting a error message from the web-site saying that - 'My
Browser has disabled cookies and I cannot access the page'. Here is the
code I wrote -

cookie_obj = cookielib.CookieJar()

# First page
socket = urllib2.Request("http://www.zap2it.com/index")
cookie_obj.add_cookie_header(socket)
data = urllib2.urlopen(socket).read()
print data

# Second page
socket =
urllib2.Request("http://tvlistings2.zap2it.com/index.asp?partner_id=national&mash=mash1&zipcode=01810&submit1=Continue")
cookie_obj.add_cookie_header(socket)
data = urllib2.urlopen(socket).read()
print data

# Third Page
socket =
urllib2.Request("http://tvlistings2.zap2it.com/system.asp?partner_id=national&zipcode=01810")
cookie_obj.add_cookie_header(socket)
data = urllib2.urlopen(socket).read()
print data


Is there anything wrong in the above done code. I printed out the all
the HTML headers in each stage to see if the cookie is getting added or
not. I found out that the cookies are not getting added. But when I do
"socket.info().headers" I get a list of all the headers wherein I can
see 'Set-Cookie' tag and the cookie value.

Anyone got any suggestions ?



From siona at chiark.greenend.org.uk  Wed Feb 22 08:04:13 2006
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 22 Feb 2006 13:04:13 +0000 (GMT)
Subject: [OT] Re: number ranges
References: <e86a5fd00602131854s73191cbbu742d4434ad074908@mail.gmail.com>
	<NMuKf.5613$%14.252734@news20.bellglobal.com>
	<1hb2uq1.e7kdkt1z0ge4rN%aleaxit@yahoo.com>
	<43FAD679.2040305@REMOVEMEcyber.com.au>
Message-ID: <vXy*tHX-q@news.chiark.greenend.org.uk>

Steven D'Aprano  <steve at REMOVEMEcyber.com.au> wrote:
>> Colin J. Williams <cjw at sympatico.ca> wrote:
>>>1. Why not treat '2 to 5' or '(2 to 5)' as a semi-open interval?
>I intellectually understand that semi-open intervals 
>are the only way to go. But reading the words, the part 
>of my brain that speaks English cries out for a closed 
>interval. Bad brain.

My native British-English speaking brain has never been able to
decide whether "to" indicates a closed or semi-open interval.
Whenever I can get away with it, I've adopted the Americanism
"through" (but always retaining that spelling) when describing
a closed interval.

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From zzhikang at hotmail.com  Thu Feb 23 20:36:34 2006
From: zzhikang at hotmail.com (kanchy kang)
Date: Fri, 24 Feb 2006 01:36:34 +0000
Subject: why don't many test frameworks support file-output?
In-Reply-To: <43FE131B.2020401@benjiyork.com>
Message-ID: <BAY108-F18E124E4AEFA2EC71B78F0CDF30@phx.gbl>


I don't think redirecting stdout to a file is a good resolution.
How to organize the output file is very important.
in my imagination, there should be one directory "log", where log files are 
saved.
and, log files should be separated according to some method(for example, one 
test file one log file).

also, from my point of view, there is one confusion between "log files" and 
normal stdout stream.

stdout stream is used to display some imediate information, for example, 
"print" statement, or exception also can be outputed to the screen...

but, stdout stream can't satisfy many requirements...
for example, in one "big" project, there are many test cases, in which we 
need record many useful data, whether correct or not. how to do this? print 
statement is not a good idea.

there should be another "stream" to do this. it can record infomation, same 
to stdout or not.
so, a good log frame will satisfy:
1) "log" is not the stdout stream.
2) log files are oganized systematically, not only one big log file.
3) log information should be written to file imediately, not be delayed 
until one case is finished. why?
test script writter may not know the test framework. if he/she write one 
test case with many output data(maybe it is necesary), this will consume the 
system memory greatly, ...
4) also, log directory should be one limited cyclic...for example, from 1 to 
10.
this will avoid imediate overwriting...sometimes the previous log 
information would be useful.

...hehe...

best regards.


>From: Benji York <benji at benjiyork.com>
>To: kanchy kang <zzhikang at hotmail.com>
>CC: python-list at python.org
>Subject: Re: why don't many test frameworks support file-output?
>Date: Thu, 23 Feb 2006 14:55:07 -0500
>
>kanchy kang wrote:
>>i browsed the following frameworks briefly: nose, OOBTest,
>>testosterone,  py.test, Sancho ... and found out they do support imediate 
>>screen-output only.
>
>You can redirect stdout to a file.
>--
>Benji York

_________________________________________________________________
Express yourself instantly with MSN Messenger! Download today - it's FREE! 
http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/



From florian.proff.schulze at gmx.net  Thu Feb 23 12:15:22 2006
From: florian.proff.schulze at gmx.net (Florian Schulze)
Date: Thu, 23 Feb 2006 18:15:22 +0100
Subject: problem with newlines in regexp substitution
Message-ID: <ops5frjwnqttxc4i@news.gmane.org>

See the following results:

Python 2.3.5 (#62, Feb  8 2005, 16:23:02) [MSC v.1200 32 bit (Intel)] on 
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import re
>>> s = "1"
>>> re.sub('1','\\n',s)
'\n'
>>> '\\n'
'\\n'
>>> re.sub('1',r'\\n',s)
'\\n'
>>> s.replace('1','\\n')
'\\n'
>>> repl = '\\n'
>>> re.sub('1',repl,s)
'\n'
>>> s.replace('1',repl)
'\\n'

Why is the behaviour of the regexp substitution so weird and can I prevent 
that? It breaks my asumptions and thus my code.

Regards,
Florian Schulze



From andreas at openrts.org  Mon Feb 13 15:21:19 2006
From: andreas at openrts.org (Andreas R.)
Date: Mon, 13 Feb 2006 21:21:19 +0100
Subject: asynchat + send problem
Message-ID: <dsqpnv$d9$1@orkan.itea.ntnu.no>

Hello,

I'm using Python's asynchat for networking. If I invoke the send() 
method of the asynchat module, only a single send operation is possible 
at any given time. If I call it more than once, only the first call is 
registered at the other client.

So how do I fix this?  Do I have to use select etc.?

The source code is here:
http://svn.gna.org/viewcvs/openrts/trunk/openrts/server/clienthandler.py?rev=36&view=markup

Thanks in advance!

Andreas R.
www.openrts.org


From schreckmail at yahoo.com  Fri Feb 17 12:53:43 2006
From: schreckmail at yahoo.com (schreckmail at yahoo.com)
Date: 17 Feb 2006 09:53:43 -0800
Subject: A way to discover PIDs of child processes?
Message-ID: <1140198823.896123.221240@g44g2000cwa.googlegroups.com>

Hi all!

I'm launching a subprocess using the following code, and I'd like to
kill off all associated subprocesses after a given timeout:

myproc = popen2.Popen3(command)

Now, because the command is executed in the shell, I end up with the
following process tree:

      PID    PPID    PGID     WINPID  TTY  UID    STIME COMMAND
     2332    3156    2332       3412  con 1012 15:34:11
/usr/bin/python2.4
     3068    2332    2332       2268  con 1012 15:34:11 /usr/bin/sh
     1584    3068    2332       2620  con 1012 15:34:12
/cygdrive/c/GNATPRO/5.01
a/bin/powerpc-elf-gdb


Here are the two options I've come up with:
1) I can kill 3068 using os.kill(myproc.pid, signal.SIGKILL), but that
keeps 1584 running and therefore doesn't do the trick.

2) I can kill the group of processes (2332) using
os.killpg(os.getpgid(myproc.id), signal.SIGKILL), but that terminates
Python as well, and I'd rather continue on my merry way in Python...

Here's my code:

myproc = popen2.Popen3(command)

second_count = 0
while myproc.poll() == -1:
    time.sleep(1) # wait a sec
    second_count = second_count + 1
    if second_count == 30:
        ##use commented code to kill group
        ##pgid = os.getpgid(myproc.pid)
        ##os.killpg(pgid, signal.SIGKILL)
        os.kill(myproc.pid, signal.SIGKILL)

One solution I've considered is using the Popen class to launch the
subprocess with shell=False.  This would eliminate the shell process so
I'd only have one process to kill.... but I've got some I/O redirection
in my command string that I'd like to pass along to the shell.  I think
I need the shell there for other reasons as well.  Any idea how I can
know if a given process has children and find out what their PIDs are?

Any suggestions are greatly appreciated!



From mensanator at aol.com  Thu Feb 16 23:06:41 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 16 Feb 2006 20:06:41 -0800
Subject: Pulling all n-sized combinations from a list
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>
	<1140140058.313161.174600@f14g2000cwb.googlegroups.com>
Message-ID: <1140149201.093387.224560@g14g2000cwa.googlegroups.com>


jess.austin at gmail.com wrote:
> hi,
>
> I'm not sure why this hasn't come up yet, but this seems to beg for
> list comprehensions, if not generator expressions.  All of the
> following run in under 2 seconds on my old laptop:
>
> >>> alph = 'abcdefghijklmnopqrstuvwxyz'
> >>> len([''.join((a,b,c,d)) for a in alph for b in alph for c in alph for d in alph])
> 456976
> >>> len([''.join((a,b,c,d)) for a in alph for b in alph for c in alph for d in alph
> ...      if (a>=b and b>=c and c>=d)])
> 23751
> >>> len([''.join((a,b,c,d)) for a in alph for b in alph for c in alph for d in alph
> ...      if (a!=b and b!=c and c!=d and d!=a and b!=d and a!=c)])
> 358800
> >>> len([''.join((a,b,c,d)) for a in alph for b in alph for c in alph for d in alph
> ...      if (a>b and b>c and c>d)])
> 14950

Well, _I_ was using them in my original program to create the
conditionals, but not for the loops. So if we combine your idea
to use list comprehensions for the loop with my list comprehensions
of the conditionals, we aren't limited to asking for only 4-letter
words.

And it runs faster than my original.

Thanks.

def ooloop6(a, n, perm=True, repl=True):
    if (not repl) and (n>len(a)): return
    r0 = range(n)
    r1 = r0[1:]
    if perm and repl:                          # ok
        v = ','.join(['c%s' % i for i in r0])
        f = ' '.join(['for c%s in a' % i for i in r0])
        e = ''.join(["p = [''.join((",v,")) ",f,"]"])
        exec e
        return p
    if (not perm) and repl:                    # ok
        v = ','.join(['c%s' % i for i in r0])
        f = ' '.join(['for c%s in a' % i for i in r0])
        i = ' and '.join(['(c%s>=c%s)' % (j,j-1) for j in r1])
        e = ''.join(["p = [''.join((",v,")) ",f," if ",i,"]"])
        exec e
        return p
    if perm and (not repl):                    # ok
        v = ','.join(['c%s' % i for i in r0])
        f = ' '.join(['for c%s in a' % i for i in r0])
        i = ' and '.join([' and '.join(['(c%s!=c%s)' % (j,k) for k in
range(j)]) for j in r1])
        e = ''.join(["p = [''.join((",v,")) ",f," if ",i,"]"])
        exec e
        return p
    if (not perm) and (not repl):              # ok
        v = ','.join(['c%s' % i for i in r0])
        f = ' '.join(['for c%s in a' % i for i in r0])
        i = ' and '.join(['(c%s>c%s)' % (j,j-1) for j in r1])
        e = ''.join(["p = [''.join((",v,")) ",f," if ",i,"]"])
        exec e
        return p

p = ooloop6('abcdefghijklmnopqrstuvwxyz',4,True,True)
print
print len(p)
p = ooloop6('abcdefghijklmnopqrstuvwxyz',4,False,True)
print
print len(p)
p = ooloop6('abcdefghijklmnopqrstuvwxyz',4,True,False)
print
print len(p)
p = ooloop6('abcdefghijklmnopqrstuvwxyz',4,False,False)
print
print len(p)

"""
456976

23751

358800

14950
"""


> 
> cheers,
> Jess



From bearophileHUGS at lycos.com  Sun Feb 19 07:03:15 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 19 Feb 2006 04:03:15 -0800
Subject: Python vs. Lisp -- please explain
In-Reply-To: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
Message-ID: <1140350595.698457.278330@o13g2000cwo.googlegroups.com>

The question about the speed is interesting. Generally the more dynamic
and flexible your language is, the slower are the programs it produces.
Lisp is almost unique in such matters (and in this regard it's maybe
better than CPython) because it allows the programmer to mix and blend
different levels of how much dynamism and how much optimized a part of
the program has to be. When you want to speed up a part of a Lisp
program (often developed starting from a slow but flexible code) you
start to use more specific functions, unboxed variables, simple arrays
of unboxed data, statically typed variables, etc. It's not easy, but if
you have some experience, often than one year, in that way you can
write programs only 20% or 50% slower than ones written in C, so for
most purposes they become fast enough. On the other hand you can
develop the program using an interactive shell and a dynamically typed
language, that speeds you a lot the prototyping, etc. You can have the
best of both things.
Python allows to mix various blends too (Psyco, Pyrex, ShedSkin, Weave,
SWIG, glues for Fortran and C/C++, etc), but in Lisp such blending
seems much more natural, finer grained, integrated in the language.
I think this isn't a limit of the language itself, because with enough
work two tools like Psyco and ShedSkin can become integrated in the
language itself (I think Psyco and SS are enough for 98% or purposes)
producing something not far from the "optimization flexibility" of
Lisp. Psyco compiles just in time some code, ShedSkin is more
aggressive, but if it becomes developed enough it can produce programs
fast as C/C++ ones with the same syntax of Python (some things aren't
supported). So then you can develop a program like in Lisp, where some
parts aren't optimized, some parts are compiled just in time, and other
critical parts are type inferenced and statically compiled for the max
speed (this requires to join ShedSkin with something like Swig, to
allow a natural, fully automatic and pythonic joining of .PYDs produced
by SS and CPython programs). PyPy can probably solve such problems in
similar ways or better, we'll see.

Bye,
bearophile



From johnjsal at NOSPAMgmail.com  Tue Feb 21 23:22:26 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 21 Feb 2006 23:22:26 -0500
Subject: a little more help with python server-side scripting
In-Reply-To: <mailman.2280.1140581372.27775.python-list@python.org>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<mailman.2280.1140581372.27775.python-list@python.org>
Message-ID: <JpidnVpklc7cembenZ2dnUVZ_tmdnZ2d@rcn.net>

Steve Holden wrote:

> Fortunately they've given you the information you need to run CGI
> scripts. Try installing this script in your cgi-bin directory as test.py 
> (you may have to set it executable):

Thank you! I desperately needed to test it, and that seemed to work. I 
didn't have to make it executable though. I wonder why?


From bob at passcal.nmt.edu  Fri Feb 10 12:10:11 2006
From: bob at passcal.nmt.edu (Bob Greschke)
Date: Fri, 10 Feb 2006 10:10:11 -0700
Subject: Tkinter, X-windows and ebay
References: <1tqdncP3Ps7s6XfenZ2dnUVZ_tGdnZ2d@nmt.edu>
Message-ID: <3bidnfcf041EVXHeRVn-gA@nmt.edu>

Thanks for the responses, guys!

I figured it was some kind of security/convenience roadblock.

What I came up with was the user can just create a text file (a kind of a 
transaction log of what things were done to the copy of the database on his 
machine), then cut and paste that text into a window created on their 
machine by the main database program (using X-windows, ssh, etc.), then the 
main program can read the contents of that text field and update the main 
copy of the database.

It should work. :)

Bob




From franz.steinhaeusler at gmx.at  Fri Feb 24 06:36:01 2006
From: franz.steinhaeusler at gmx.at (Franz Steinhaeusler)
Date: Fri, 24 Feb 2006 12:36:01 +0100
Subject: regular expresson for Unix and Dos Lineendings wanted
References: <jterv157550g4qd4rosc3a2o8l69gcau8v@4ax.com>
	<mailman.2346.1140703308.27775.python-list@python.org>
	<ujgrv19d4thh28cvh4emqi2m1p5g1gofuh@4ax.com>
	<mailman.2361.1140716519.27775.python-list@python.org>
Message-ID: <sgrtv1l4uhbjrr1th8a7g3sdsb57bkt38h@4ax.com>

On Thu, 23 Feb 2006 17:41:47 +0000, Martin Franklin
<mfranklin1 at gatwick.westerngeco.slb.com> wrote:

>Franz Steinhaeusler wrote:
>> On Thu, 23 Feb 2006 13:54:50 +0000, Martin Franklin
>> <mfranklin1 at gatwick.westerngeco.slb.com> wrote:
>> 
>>>>>>> r="erewr    \r\nafjdskl     "
>>>> 'erewr    \r\nafjdskl'
>>>>
>>>> 2) Unix
>>>>>>> r="erewr    \nafjdskl     "
>>>> 'erewr\nafjdskl'
>>> why not use string methods strip, rstrip and lstrip
>>>
>> 
>> because this removes only the last spaces,
>>>>> r
>> 'erewr    \r\nafjdskl     '
>>>>> r.rstrip()
>> 'erewr    \r\nafjdskl'
>> 
>> I want:
>> 'erewr\r\nafjdskl'
>> 
>> or for unix line endings
>> 'erewr\nafjdskl'
>> 
>
>
>how about one of these variations
>
>print 'erewr    \r\nafjdskl     '.replace(" ", "")
>print 'erewr    \r\nafjdskl     '.strip(" \t")
>
>

Version 1:

>>> w='erewr    \r\nafjdskl     '.replace(" ", "")
>>> w
'erewr\r\nafjdskl'
>>> w='erewr    \nafjdskl     '.replace(" ", "")
>>> w
'erewr\nafjdskl'
>>> w='word1 word2   \nafjdskl     '.replace(" ", "")
>>> w
'word1word2\nafjdskl'
>>> 

it replaces all spaces, not only the trailing whitespaces.


version 2:

>>> w = 'erewr    \r\nafjdskl     '.strip(" \t")
>>> w
'erewr    \r\nafjdskl'
>>> w = 'erewr    \nafjdskl     '.strip(" \t")
>>> w
'erewr    \nafjdskl'
>>> w = 'word1 word2    \nafjdskl     '.strip(" \t")
>>> w
'word1 word2    \nafjdskl'
>>> 

I found a solution (not the most beautiful, but for 
my purpose sufficiently good.)
Given: a file has no mixed lineendings, so it is either
a dos or unix file (mac line endings not respected).


swin="erewr \r\nafjdskl "
sunix="erewr \nafjdskl "

Dos Line endings (at least on '\r' included)?
r is contents of a file:

helpchar = ''
if r.find('\r') != -1:
    helpchar = '\r'
retrailingwhitespacelf = re.compile('(?<=\S)[ \t'+helpchar+']+$',
re.MULTILINE)
newtext, n = retrailingwhitespace.subn(helpchar, r)
if n > 1:
   r = newtext


-- 
Franz Steinhaeusler


From fredrik at pythonware.com  Tue Feb  7 16:32:40 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 7 Feb 2006 22:32:40 +0100
Subject: Question about idioms for clearing a list
References: <mailman.1294.1138727665.27775.python-list@python.org>	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>	<mailman.1489.1139232969.27775.python-list@python.org><pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au>	<ds83kd$98m$1@sea.gmane.org><mailman.1510.1139250471.27775.python-list@python.org>	<43E7F59B.9070009@REMOVEMEcyber.com.au><mailman.1537.1139297533.27775.python-list@python.org>
	<E78Gf.22893$Jd.14515@newssvr25.news.prodigy.net>
Message-ID: <dsb3lq$shu$1@sea.gmane.org>

Bryan Olson wrote:

> So is consistency; it ain't Perl, thank Guido.

consistency is the hobgoblin of little minds.

> Python now has, what, three built-in mutable collections types:
> lists, dictionaries, and sets. Dicts and sets both have a clear()
> method and lists do not.

dicts and sets are mappings, and lists are not.  mappings don't
support slicing.  lists do.

are you sure you know Python ?

</F>





From mensanator at aol.com  Mon Feb 13 21:31:25 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 13 Feb 2006 18:31:25 -0800
Subject: Loop Backwards
References: <1139883877.323042.199040@o13g2000cwo.googlegroups.com>
Message-ID: <1139884285.356559.101290@z14g2000cwz.googlegroups.com>


Dave wrote:
> This should be simple, but I can't get it:
>
> How do you loop backwards through a list?
>
> For example, in, say, Javascript:
>
> for (var i  = list.length - 1; i >=0; i--) {
>     do_stuff()
> }
>
> I mean, I could reverse the list, but I don't want to. I want it to
> stay exactly the same, but I want to start at the end and end at the
> beginning.

Negative indexes start at the opposite end than positive indexes.

>>> s = [1,2,3,4,5]
>>> for i in range(len(s)):
	print s[-i-1],
	
5 4 3 2 1
>>> 


> 
> Thanks!
> 
> - Dave



From reply.in.the.newsgroup at my.address.is.invalid  Mon Feb  6 11:10:56 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Mon, 06 Feb 2006 17:10:56 +0100
Subject: read file problem
References: <1139239797.811569.253010@g43g2000cwa.googlegroups.com>
Message-ID: <f4teu1d5a1v1eqtonbej5esb1hcle5p2ej@4ax.com>

Ernesto:
>fileHandle = open(filePath, 'r').read();
                                 ^^^^^^^^
                    Remove this:

open() returns the filehandle, open().read() returns the data read from
the filehandle.

-- 
Ren? Pijlman


From skromta at gmail.com  Tue Feb 14 04:43:35 2006
From: skromta at gmail.com (Kalle Anke)
Date: Tue, 14 Feb 2006 10:43:35 +0100
Subject: Python / Apache / MySQL
References: <1139907519.427789.188760@g14g2000cwa.googlegroups.com>
	<slrndv38ti.7rh.sybrenUSE@schuimige.unrealtower.org>
Message-ID: <0001HW.C01764D700060858F0407550@news.individual.de>

On Tue, 14 Feb 2006 10:32:34 +0100, Sybren Stuvel wrote
(in article <slrndv38ti.7rh.sybrenUSE at schuimige.unrealtower.org>):

> I second Bruno: swap MySQL in favour of PostgreSQL.

And the reason is ?? (apart from PostgreSQL being larger and more complete, 
what are the differences for "simple" usage?)

             jem



From scott.daniels at acm.org  Wed Feb  8 12:35:49 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Wed, 08 Feb 2006 09:35:49 -0800
Subject: Mixing custom __setattr__ method and properties in new style
	classes
In-Reply-To: <1139418477.572639.154300@z14g2000cwz.googlegroups.com>
References: <1139418477.572639.154300@z14g2000cwz.googlegroups.com>
Message-ID: <43ea2ac0$1@nntp0.pdx.net>

L.C. Rees wrote:
> Can custom __setattr__ methods and properties be mixed in new style
> classes?
> 
> I experimented with a new style class with both a custom __setattr__
> method and a property. Attributes controlled by the __setattr__ method
> work fine. When I attempt to set or get the property it raises the
> error: "TypeError: _settext() takes exactly two arguments (1 given)".
> This suggests that the __setattr__ may be conflicting with assignment
> to the property since it doesn't seem the class name is being passed to
> the property when it's created. This is the code for the property at
> the end of the class definition:
> 
>     def _settext(self, txt):
>         self._tree.text = txt
> 
>     def _gettext(self, txt):
>         return self._tree.text
> 
>     def _deltext(self, txt):
>         self._tree.text = ''
> 
>     text = property(_settext, _gettext, _deltext)
> 
The order to call property is get, set, del, doc
You need to take a _lot_ more care before asking for help.
neither get not del take any arg besides self.  When you are
trying to debug an interaction, make sure your tests work stand-
alone.

     class Holder(object): pass  # to allow attributes stuck on

     class Demo(object):
         def __init__(self):
             self._tree = Holder()

         def _settext(self, txt):
             self._tree.text = txt

         def _gettext(self):
             return self._tree.text

         def _deltext(self):
             self._tree.text = ''

         text = property(_gettext, _settext, _deltext, 'text property')

     d = Demo()
     d.text = 'my text'
     print repr(d.text)
     del d.text
     print repr(d.text)

--Scott David Daniels
scott.daniels at acm.org


From xavier.morel at masklinn.net  Tue Feb  7 12:04:07 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Tue, 07 Feb 2006 18:04:07 +0100
Subject: Dual Core outlook
In-Reply-To: <1139329268.695421.191340@g47g2000cwa.googlegroups.com>
References: <1139329268.695421.191340@g47g2000cwa.googlegroups.com>
Message-ID: <dsajpk$c26$1@aphrodite.grec.isp.9tel.net>

malv wrote:
> Of course, multiprocessing has been used for many years but this always
> involved a much higher level of sophistication on the part of the
> designers. This point seems to be largely hidden from the public,
> ignorant and semi-ignorant, by the chip manufacturers.
> Will new languages see the light rendering the spreading of
> applications over many processors quasi transparent?
> What is the outlook for Python? Would Ironpython with .net do better?
> What about talk by the Java lobby that Java would be very much suited
> for taking advantage of dual-core? Is there any thruth to this?
> 
Python has support for OS threads, but it also has the GIL (a global 
lock from the interpreter). This means that Python behaves the same way 
Java or C# do as far as threads are concerned but for one field: 
multiprocessor (or multicore) situations.

While C# or Java can execute two threads of the same process on two 
separate cores/processors Python can't.

This means that you can't choke a multiprocessor/multicores machine with 
Python threads, and that if you want to scale in a 
multiprocessor/multicore environment (e.g. make use of all the available 
cores/processors) you have to use processes not threads (e.g. you have 
to launch multiple instances of the Python interpreter, each one having 
the ability to execute on a different core/processor).

Now the question is: do you want to do it? Do you have several extremely 
demanding computational threads? If yes, then Python probably isn't what 
you need (unless you implement your computations in specific C modules 
and get rid of the GIL issue). If not (a single computational thread and 
several low-resources GUI/network/whatever threads), it's a non-issue.


From MrJean1 at gmail.com  Fri Feb  3 20:04:05 2006
From: MrJean1 at gmail.com (MrJean1)
Date: 3 Feb 2006 17:04:05 -0800
Subject: Best way to determine if a certain PID is still running
In-Reply-To: <mailman.1378.1138960840.27775.python-list@python.org>
References: <43E2AD80.2000100@ilm.com>
	<mailman.1378.1138960840.27775.python-list@python.org>
Message-ID: <1139015045.529825.210530@g44g2000cwa.googlegroups.com>

Take look at the poll() methods in the subprocess.py source file of
your Python install.

It shows how to use the os.wait_pid(pid, os.WNOHANG) to check whether a
process is still running or has terminated (and how, from the returned
status value).

Btw, on *nix you must call os.wait_pid(pid, ...) to avoid creating
zombie processes.

Using the subprocess module hides and handles all those details for
you, both on *nix and Windows.

/Jean Brouwers



From aleaxit at yahoo.com  Mon Feb 27 22:36:40 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 27 Feb 2006 19:36:40 -0800
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>
	<4402AB7F.7070804@REMOVEMEcyber.com.au>
	<7xzmkdxkce.fsf@ruckus.brouhaha.com>
	<87u0akxq2h.fsf@rose.polar.local>
Message-ID: <1hbfns2.139sqgbdzreb3N%aleaxit@yahoo.com>

Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
   ...
> The Python parser knows what to do when a comparison returns
> NotImplemented.

The parser has nothing to do with it, but the bytecode interpreter sure
does;-).


Alex


From roccomoretti at hotpop.com  Tue Feb 21 10:56:27 2006
From: roccomoretti at hotpop.com (Rocco Moretti)
Date: Tue, 21 Feb 2006 09:56:27 -0600
Subject: Mutable numbers
In-Reply-To: <mailman.2238.1140535034.27775.python-list@python.org>
References: <dteele$9pi$1@home.itg.ti.com>	<43fb2462$0$3211$636a55ce@news.free.fr>
	<mailman.2238.1140535034.27775.python-list@python.org>
Message-ID: <dtfd79$kqu$1@news.doit.wisc.edu>

Steve Holden wrote:
> fraca7 wrote:
> 
>> The memory allocation for integers is optimized. 'Small' integers 
>> (between -5 and 100 IIRC) are allocated once and reused. The memory 
>> for larger integers is allocated once and reused whenever possible, so 
>> the malloc() overhead is negligible.
> 
> 
> The first bit's right, the second bit isn't:
> 
>  >>> id(12100)
> 4604168
>  >>> id(121*100)
> 4604204
>  >>>
> 

FWIW, I read "whenever possible" not as "whenever theoretically 
possible" but as "whenever the (comparatively simple) interpreter 
recognizes that reuse is possible".

 >>> a = 12100
 >>> b = 12100
 >>> a is b
False
 >>> def f():
	a = 12100
	b = 12100
	c = 121*100
	print a is b
	print a is c

	
 >>> f()
True
False
 >>>

The interpreter, when compiling the function, can recognize that the two 
constants are identical, and makes them the same object. On the 
interactive interpreter, or after a computation, the interpreter doesn't 
bother to check to see if it already has the same value integer object. 
(It could, but the overhead would likely swamp any savings.)


From deets at nospam.web.de  Wed Feb 15 11:27:32 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 15 Feb 2006 17:27:32 +0100
Subject: low level data types
References: <1140005257.773955.32860@g14g2000cwa.googlegroups.com>
	<mailman.1951.1140015161.27775.python-list@python.org>
	<1140020594.762674.162840@g47g2000cwa.googlegroups.com>
Message-ID: <45h35aF6mmrbU1@uni-berlin.de>

dementrio wrote:

> Thanks for the hint!
> 
> However now I have another problem - endianness (the client runs on
> powerpc, the server on x86). I found that simply reversing the stuff I
> recv() works, but is there any cleaner way for taking care of this?

Have you actually _read_ the struct documentation?

"""
Alternatively, the first character of the format string can be used to
indicate the byte order, size and alignment of the packed data, according
to the following table: 

...

"""

Diez


From steve at holdenweb.com  Mon Feb 13 16:46:26 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Feb 2006 16:46:26 -0500
Subject: how do you pronounce 'tuple'?
In-Reply-To: <0mt1v15ei7tg1mr0oclo703b6c92jr9vb4@4ax.com>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>	<mailman.1806.1139805039.27775.python-list@python.org>
	<0mt1v15ei7tg1mr0oclo703b6c92jr9vb4@4ax.com>
Message-ID: <43F0FE32.3080708@holdenweb.com>

Dave Hansen wrote:
> On Sun, 12 Feb 2006 23:30:25 -0500 in comp.lang.python, Steve Holden
> <steve at holdenweb.com> wrote:
> 
> 
>>John Salerno wrote:
> 
> [...]
> 
>>>I know it comes from the suffix -tuple, which makes me think it's 
>>>pronounced as 'toople', but I've seen (at m-w.com) that the first 
>>>pronunciation option is 'tuhple', so I wasn't sure. Maybe it's both, but 
>>>which is most prevalent?
> 
> [...]
> 
>>"Tyoople", "toople" or "tupple" depending on who you are, where you grew 
>>up and who you are speaking to. As with so many Usenet questions, 
>>there's no right answer, only 314 wrong ones :-)
> 
> 
> FWIW, I've often heard the latter two, but never the first one.
> "Tuple" by itself tends to be "toople," but as a suffix tends to be
> "tupple."
> 
No, but then you probably listen to the noos, not the nyoos, on the TV 
or radio. That's a particularly British pronunciation.

> 
>>I teach on both sides of the Atlantic, and have learned to draw a mental 
>>breath before trying to pronounce the word "router". Americans find the 
>>British pronunciation ("rooter") hilarious, despite the fact they tell 
> 
> 
> Probably a cultural reference to "Roto-Rooter," a nationwide plumbing
> company specializing in cleaning (ostensibly tree and other plant
> roots, though often more, uh, prozaic materials), from sewer drains.
> "Call Roto-Rooter, that's the name, and away go troubles down the
> drain."
> 
> 
>>me I drive on "Root 66" to get to DC. The Brits are politer, and only 
>>snigger behind my back when I pronounce it as Americans do, to rhyme 
>>with "outer".
> 
> 
> I've seen "route" pronounced "rout" or "root" depending on the
> background and mood of the speaker, though in this part of the country
> ("midwest", though "middle" might be more accurate) the former
> pronunciation is far more common.  Through the sugestive power of
> television, however, I suspect nearly every American would speak of
> "root 66" even though the next sentence might reference "rout 12."
> 
> On NPR ([American] National Public Radio), there's a weekly music
> program called "American Routes" pronounced such to conjure the
> alternate "American Roots."
> 
Never caught that. Must go get some batteries for my radio.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From mfranklin1 at gatwick.westerngeco.slb.com  Thu Feb 23 08:54:50 2006
From: mfranklin1 at gatwick.westerngeco.slb.com (Martin Franklin)
Date: Thu, 23 Feb 2006 13:54:50 +0000
Subject: regular expresson for Unix and Dos Lineendings wanted
In-Reply-To: <jterv157550g4qd4rosc3a2o8l69gcau8v@4ax.com>
References: <jterv157550g4qd4rosc3a2o8l69gcau8v@4ax.com>
Message-ID: <43FDBEAA.4010400@gatwick.westerngeco.slb.com>

Franz Steinhaeusler wrote:
> Hello, I need a regularexpression, which trims trailing whitespaces.
> 
> While with unix line endings, it works; 
> but not with Window (Dos) CRLF's:
> 
>>>> import re
>>>> retrailingwhitespace = re.compile('(?<=\S)[ \t]+$', re.MULTILINE)
> 
> 1) Windows
>>>> r="erewr    \r\nafjdskl     "
>>>> newtext, n = retrailingwhitespace.subn('', r)
>>>> n
> 1
>>>> newtext
> 'erewr    \r\nafjdskl'
> 
> 2) Unix
>>>> r="erewr    \nafjdskl     "
>>>> newtext, n = retrailingwhitespace.subn('', r)
>>>> n
> 2
>>>> newtext
> 'erewr\nafjdskl'
> 
> Who can help me (regular expression, which works for both cases).
> 
> Thank you in advance!


why not use string methods strip, rstrip and lstrip




From BCohen at investec.co.za  Fri Feb 10 08:08:12 2006
From: BCohen at investec.co.za (Brett Cohen)
Date: Fri, 10 Feb 2006 15:08:12 +0200
Subject: Python-list Digest, Vol 29, Issue 147
Message-ID: <1ECF9A4C8B154B44889CE708C433773E9CCB53@mbzajhb02.za.corp.investec.com>

nope, we where one short plus mark just pulled out so now we're two short. if you can get ANYONE that would be great?

-----Original Message-----
From: python-list-bounces+bcohen=investec.co.za at python.org
[mailto:python-list-bounces+bcohen=investec.co.za at python.org]On Behalf
Of python-list-request at python.org
Sent: 10 February 2006 02:21
To: python-list at python.org
Subject: Python-list Digest, Vol 29, Issue 147


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From LittlePython at lost.com  Thu Feb 16 21:18:13 2006
From: LittlePython at lost.com (LittlePython)
Date: Fri, 17 Feb 2006 02:18:13 GMT
Subject: Seaching Active Directory via ADO
References: <g_7Jf.33401$0H1.22606@trnddc04>
Message-ID: <FnaJf.78254$_D1.33447@trnddc03>

To be more clear, something like this example but in python. I have tryed to
convert something very simular to this
but have failed.

 ------ SCRIPT CONFIGURATION ------
strBase    =  "<LDAP://<BaseDN>>;"
strFilter  = "<Filter>;"
strAttrs   = "<AttrList>;"
strScope   = "<Scope>"
' ------ END CONFIGURATION ---------

set objConn = CreateObject("ADODB.Connection")
objConn.Provider = "ADsDSOObject"
objConn.Open "Active Directory Provider"
set objComm = CreateObject("ADODB.Command")
objComm.ActiveConnection = objConn
objComm.Properties("Page Size") = 1000
objComm.CommandText = strBase & strFilter & strAttrs & strScope
set objRS = objComm.Execute
objRS.MoveFirst
while Not objRS.EOF
    Wscript.Echo objRS.Fields(0).Value
    objRS.MoveNext
wend




"LittlePython" <LittlePython at lost.com> wrote in message
news:g_7Jf.33401$0H1.22606 at trnddc04...
> I am have trouble finding a simple working example of  using ADO to search
> Active Directory. I am hoping someone could point me to a generic working
> script that connects to AD and pulls up a recordset to help me get started
> into the right direction in learning ADO, ADSI on Python.
>
>




From richard.m.tew at gmail.com  Fri Feb 17 14:22:40 2006
From: richard.m.tew at gmail.com (Richard Tew)
Date: 17 Feb 2006 11:22:40 -0800
Subject: Stackless Python sprint at PyCon 2006
Message-ID: <1140204160.746095.120610@z14g2000cwz.googlegroups.com>

There is a Stackless Python sprint planned for PyCon 2006 during the
days of the 27th of February to the 2nd of March (the post-conference
sprint period).

The goal is to update Stackless making it more current and
approachable.  We are planning to port it to the latest version of
Python.  But anyone who has an interest in Stackless is welcome to come
along and help out in any way that appeals to you.

You can read more about the sprint and the talk about how Stackless is
used in the massively multiplayer game EVE Online at PyCon here:
http://www.stackless.com/Members/rmtew/pycon2006

Or browse the following web site to get more information about
Stackless:
http://www.stackless.com/

Richard.



From s99999999s2003 at yahoo.com  Mon Feb 13 05:01:47 2006
From: s99999999s2003 at yahoo.com (s99999999s2003 at yahoo.com)
Date: 13 Feb 2006 02:01:47 -0800
Subject: Question regarding mkdir of ftputil
Message-ID: <1139824907.881526.5210@f14g2000cwb.googlegroups.com>

hi
i am currently using the FTP wrapper from
http://cheeseshop.python.org/pypi/ftputil/2.0.3
The documentation states "In the current implementation, this doesn't
construct "intermediate" directories which don't already exist".
i would like to make directories at the remote server whenever the path
doesn't exist
eg
/rootdir/path1/<year>/<month> ....because <year> and <month> is
"changing"

Is there a way to do this using other FTP modules, or even ftplib?  or
the only way is to use "try, except" method?
thanks for any advice.



From john_zenger at yahoo.com  Sun Feb 19 09:17:23 2006
From: john_zenger at yahoo.com (John Zenger)
Date: Sun, 19 Feb 2006 09:17:23 -0500
Subject: Get parameters from URL using CGI
In-Reply-To: <1140285087.919635.74530@g43g2000cwa.googlegroups.com>
References: <1140285087.919635.74530@g43g2000cwa.googlegroups.com>
Message-ID: <KpWdnU_aLcZq4GXenZ2dnUVZ_tednZ2d@comcast.com>

import cgi
import cgitb; cgitb.enable()  # Optional; for debugging only

print "Content-Type: text/html"
print

f = cgi.FieldStorage()
for i in f.keys():
    print "<p>",i,":",f[i].value


abcd wrote:
> i want to create a CGI script which simply prints out values given via
> the URL (such as when a GET is performed).
> 
> So if I have a script named, foo.cgi ....and I access it by going to:
> 
> http://www.somesite.com/cgi-bin/foo.cgi?name=john&age=90
> 
> I want foo.cgi to print out:
> name: john
> age: 90
> 
> 
> how do i get the values from the URL like that?
> 
> thanks
> 


From tjreedy at udel.edu  Mon Feb 20 16:41:05 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 20 Feb 2006 16:41:05 -0500
Subject: Is inifinite loop not a good practice?
References: <43F9DF68.5020301@gmail.com>
Message-ID: <dtdd1h$cs5$1@sea.gmane.org>


"Alvin A. Delagon" <adelagon at gmail.com> wrote in message 
news:43F9DF68.5020301 at gmail.com...
> I've been hearing comments that infinite loop is a bad programming
> practice.

What is bad is an *unintended* loop that goobles cpu time while outputting 
nothing.  Example:

def fact(n):
  res = 1
  while n != 0:
    res *= n
    n -= 1
  return res

fact(-1)

Now imagine that you are paying $360/hr ($.10/sec) (for IBM mainframe time) 
and you should understand the bad reputation (and why jobs were submitted 
with a time limit!). ;-)

Terry Jan Reedy





From swrittenb at gmail.com  Wed Feb  8 17:07:13 2006
From: swrittenb at gmail.com (Swroteb)
Date: 8 Feb 2006 14:07:13 -0800
Subject: Pulling all n-sized combinations from a list
In-Reply-To: <7x7j85czje.fsf@ruckus.brouhaha.com>
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>
	<7x7j85czje.fsf@ruckus.brouhaha.com>
Message-ID: <1139436433.439927.175100@g47g2000cwa.googlegroups.com>


Paul Rubin wrote:
> "Swroteb" <swrittenb at gmail.com> writes:
> > Atrocious and slow, I'm sure, but is there a better way?  I can't
> > simply create a list with the combinations I want, since it won't fit
> > into memory.  And I'm sure I can do it using a standard paradigm using
> > five indexed for loops (ie, for i = 1, for j = i+1, for k = j+1, etc.).
> >  But is there a really nice way to handle this in Python?
>
> Is this a homework problem?  Hint: 1) use recursion; 2) use generators.

I appreciate the response; no, this is not a homework problem.

I'm a little bit confused about your generator suggestion.  My list is
a set of references to instantiated objects.  I'm just unsure about how
to iterate through every unique combination of those references.  Are
you suggesting that I set up methods to provide the indices I'm looking
for in the list to iterate over?



From uval at rz.uni-karlsruhe.de  Fri Feb 10 19:46:11 2006
From: uval at rz.uni-karlsruhe.de (=?ISO-8859-1?Q?Sch=FCle_Daniel?=)
Date: Sat, 11 Feb 2006 01:46:11 +0100
Subject: is there a better way?
In-Reply-To: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
Message-ID: <dsj20p$igr$1@news2.rz.uni-karlsruhe.de>

I don't want to hijack the thread I was thinking
whether something like lst.remove(item = 0, all = True)
would be worth adding to Python?

it could have this signature

def remove(item, nItems = 1, all = False)
	...
	return how_many_deleted

lst.remove(item = 0, nItems = 1)
lst.remove(item = 0, nItems = 2)

lst.remove(item = 0, all = True)
in last case nItems is ignored

Regards, Daniel



From deets at nospam.web.de  Sat Feb 18 09:18:11 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 18 Feb 2006 15:18:11 +0100
Subject: general coding issues - coding style...
In-Reply-To: <slrndve8oe.5jb.mac@news.calmar.ws>
References: <slrndve8oe.5jb.mac@news.calmar.ws>
Message-ID: <45ool3F7ipqbU1@uni-berlin.de>

calmar schrieb:
> Hi all,
> 
> since I'm just a 'handicraft'/beginner or so,
> 
> could anybody provide me with some (rough) hints, about how to enhance the code
> here:

  - why are these {{{ thingies there?

  - use string interpolation like "Foo %s %i" % ("bar", 1) instead of 
concatenating strings.

  - it seems that you could benefit from a class instead of a bunch of 
functions & few globals. No need to go too crazy about OO, but it has 
its merits

  - try using something like glade - creating GUIs by hand sucks 
big-timer :)

  - read up about unicode and encodings, what they mean and why and when 
to use what. Really. Most problems in that field stem from people being 
sort of ignorant on that topic and just wiggling themselves through all 
the time - in the end, messing up stuff. It really _isn't_ that complicated.

  - when creating string-keyed dicts, the idiom

    dict(foo="bar",
         baz="pillepalle")

has its merits.

Besides that - looks ok to me.

Diez


From bearophileHUGS at lycos.com  Wed Feb 22 19:17:29 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 22 Feb 2006 16:17:29 -0800
Subject: What's up with this code?
In-Reply-To: <1140649331.924736.128420@g43g2000cwa.googlegroups.com>
References: <1140649331.924736.128420@g43g2000cwa.googlegroups.com>
Message-ID: <1140653849.655985.286900@o13g2000cwo.googlegroups.com>

Gregory Petrosyan:
> coefs.extend(it.chain(rcoefs1, rcoefs2)) #? -- here is magic

Can't you just do a couple of extend? Something like:

coefs.extend(rcoefs1)
coefs.extend(rcoefs2)

This looks simpler and probably faster too.

Bye,
bearophile



From sjuranic at gmail.com  Mon Feb 27 01:07:57 2006
From: sjuranic at gmail.com (Steve Juranich)
Date: Sun, 26 Feb 2006 23:07:57 -0700
Subject: Kill forked processes
References: <1140990351.604347.29110@i39g2000cwa.googlegroups.com>
	<mailman.2456.1140992498.27775.python-list@python.org>
	<1141005265.153261.201230@e56g2000cwe.googlegroups.com>
Message-ID: <dtu4vb$770$1@sea.gmane.org>

kmkz wrote:

> Lets say my script A executes two other scripts, B and C. B is a Python
> file compiled into an exe and uses the regular black box. C, however,
> is a C++ program that I did not write, and have no access to (besides
> executing it. ie, i don't have its source). I would like to fork off
> the process B and C from A, but make B and C invisible and unable to be
> shut down by the user. This way, they have to kill process A.
> Unfortunately, this brings me back to the problem I posted above: how
> to make the subprocesses dependant on its parent process. Since I have
> no access to the C++ program's source I need to come up with a better
> way of forcing the OS to "see" process B as being inside of process C
> and then shut it down, deallocate its memory, close its pipes, etc...
> 
> Any ideas?

Again, the atexit and signal modules will be your friend.

> I'll be willing to PayPal $10 to anyone who completely figures this out
> for me :)

1) I wouldn't want to spoil the fun.
2) My time writing code costs much more than that. :-)

-- 
Steve Juranich
Tucson, AZ
USA



From franz.steinhaeusler at gmx.at  Thu Feb 23 09:59:54 2006
From: franz.steinhaeusler at gmx.at (Franz Steinhaeusler)
Date: Thu, 23 Feb 2006 15:59:54 +0100
Subject: regular expresson for Unix and Dos Lineendings wanted
References: <jterv157550g4qd4rosc3a2o8l69gcau8v@4ax.com>
	<1140703941.270934.63050@f14g2000cwb.googlegroups.com>
	<1140705876.531175.240600@z34g2000cwc.googlegroups.com>
Message-ID: <a7jrv11qt4oh4qeuo5abmafl60lj3pghus@4ax.com>

On 23 Feb 2006 06:44:36 -0800, "gene tani" <gene.tani at gmail.com> wrote:

>
>gene tani wrote:
>> Franz Steinhaeusler wrote:
>> >
>> > Who can help me (regular expression, which works for both cases).
>>
>> universal newlines:
>> http://www.python.org/doc/2.3.3/whatsnew/node7.html
>> http://mail.python.org/pipermail/python-list/2006-February/324410.html
>
>if multiple end-of line markers are present (\r, \r\n and or \n), use
>the file's newlines attribute to see what they are.  I think the thread
>linked above touched on that.  Otherwise newlines (or os.linesep)
>should tell you what end of line is in that file.
>
>http://docs.python.org/lib/bltin-file-objects.html

Thank you for your info.

I need it for a file, whose line endings I don't know.

I wrote for DrPython this script:
(using styled text control and wxPython) and this works,
but I'm looking for a shorter way:

===================================================================
#drscript
#RemoveTrailingWhitespaces

import re
import string

eol = DrDocument.GetEndOfLineCharacter()
regex = re.compile('\s+' + eol, re.MULTILINE)

relewin = re.compile('\r\n', re.M)
releunix = re.compile('[^\r]\n', re.M)
relemac = re.compile('\r[^\n]', re.M)

text = DrDocument.GetText()

#check line endings
win = unix = mac = 0
if relewin.search(text):
	win = 1
if releunix.search(text):
	unix = 1
if relemac.search(text):
	mac = 1
mixed = win + unix + mac

#correct the lineendings before
if mixed > 1:
	wx.MessageDialog(DrFrame, "Line endings mixed", "Remove trailing
Whitespace", wx.ICON_EXCLAMATION).ShowModal()

#ok to remove
else:
	lines = text.split(eol)
	new_lines = []
	nr_lines = 0
	nr_clines = 0
	first_cline = -1
	for line in lines:
		nr_lines += 1
		result = regex.search(line + eol)
		if result != None:
			end = result.start()
			nr_clines += 1
			if first_cline == -1:
				first_cline = nr_lines
			new_lines.append (line [:end])
		else:
			new_lines.append(line)

	#file has trailing whitespaces
	if nr_clines > 0:
		d = wx.MessageDialog(DrFrame, "%d of %d lines have trailing
whitespaces (First:%d)\nCorrect?" % (nr_clines, nr_lines, first_cline),
\
			"Remove trailing Whitespace", wx.OK | wx.CANCEL |
wx.ICON_QUESTION)
		answer = d.ShowModal()
		d.Destroy()
		if (answer == wx.ID_OK):
			newtext = string.join(new_lines, eol)
			#save current line
			curline = DrDocument.GetCurrentLine()
			DrDocument.SetText(newtext)
			#jump to saved current line
			DrDocument.GotoLine(curline)

	#no need to change the file
	else:
		wx.MessageDialog(DrFrame, "File ok!", "Remove trailing Whitespace",
wx.ICON_EXCLAMATION).ShowModal()

===========================================================================
-- 
Franz Steinhaeusler


From adamm_n0 at spamm_blic.net  Sun Feb 19 14:52:54 2006
From: adamm_n0 at spamm_blic.net (Mladen Adamovic)
Date: Sun, 19 Feb 2006 20:52:54 +0100
Subject: editor for Python on Linux
Message-ID: <dtai6e$23m$2@ariane.blic.net>

Hi!

I wonder which editor or IDE you can recommend me for writing Python 
programs. I tried with jEdit but it isn't perfect.



From reply.in.the.newsgroup at my.address.is.invalid  Tue Feb 21 11:11:02 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Tue, 21 Feb 2006 17:11:02 +0100
Subject: Zope/Plone - Is it the right solution?
References: <1140532818.195281.316580@g44g2000cwa.googlegroups.com>
	<1140537603.392927.207650@f14g2000cwb.googlegroups.com>
Message-ID: <jjemv1hcg383f0bdfrfs1s0qmotlk0dgvo@4ax.com>

Michele Simionato:
>I usually do not recommend Zope, unless you want to make a career as a
>Zope consultant. 

You have a point there.

>If you have to interact with a relational database, your life with Zope 
>may be hard: 

And if you have to interact with flat files, your life with an RDBMS may
be hard. Zope contains a full-fledged post-relational object database
called ZODB.

The time it took me to learn to program with it (outside of Zope) is less
than 1% of the time I've spent learning the relational model and SQL.

Get your data out of those silly rows and columns, and put it in
first-class objects!

-- 
Ren? Pijlman


From xavier.morel at masklinn.net  Sat Feb  4 13:45:05 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Sat, 04 Feb 2006 19:45:05 +0100
Subject: re.search slashes
In-Reply-To: <43e4f066$1@nntp0.pdx.net>
References: <Yj4Ff.746690$x96.167598@attbi_s72> <43e4f066$1@nntp0.pdx.net>
Message-ID: <ds2sj2$kqh$1@aphrodite.grec.isp.9tel.net>

Scott David Daniels wrote:
> pyluke wrote:
>> I'm parsing LaTeX document and want to find lines with equations blocked 
>> by "\[" and "\]", but not other instances of "\[" like "a & b & c \\[5pt]"
>> so, in short, I was to match "\[" but not "\\]" ....  I've tried:
>> check_eq = re.compile('(?!\%\s*)\\\\\[')
>  > check_eq.search(line)
>  > this works in finding the "\[" but also the "\\["
> 
> If you are parsing with regular expressions, you are running a marathon.
> If you are doing regular expressions without raw strings, you are running
> a marathon barefoot.
> 
> Notice:  len('(?!\%\s*)\\\\\[') == 13
>           len(r'(?!\%\s*)\\\\\[') == 15
> 
>> so I would think this would work
>> check_eq = re.compile('(?![\%\s*\\\\])\\\\\[')
>> check_eq.search(line)
>>
>> but it doesn't.  Any tips?
> Give us examples that should work and that should not (test cases),
> and the proper results of those tests.  Don't make people trying to
> help you guess about anything you know.
> 
> --Scott David Daniels
> scott.daniels at acm.org

To add to what scott said, two advices:
1. Use Kodos, it's a RE debugger and an extremely fine tool to generate 
your regular expressions.
2. Read the module's documentation. Several time. In your case read the 
"negative lookbehind assertion" part "(?<! ... )" several time, until 
you understand how it may be of use to you.


From wrongbad at gmail.com  Mon Feb 27 18:10:43 2006
From: wrongbad at gmail.com (I V)
Date: 27 Feb 2006 15:10:43 -0800
Subject: PEP 354: Enumerations in Python
In-Reply-To: <7xzmkdxkce.fsf@ruckus.brouhaha.com>
References: <87accdplbj.fsf@rose.polar.local>
	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>
	<4402AB7F.7070804@REMOVEMEcyber.com.au>
	<7xzmkdxkce.fsf@ruckus.brouhaha.com>
Message-ID: <1141081843.064202.10560@i40g2000cwc.googlegroups.com>

Paul Rubin wrote:
> Hmm, I also see the PEP doesn't specify what's supposed to happen with
>
>   Weekdays = enum('sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat')
>   Solar_system = enum('sun', 'mercury', 'venus', 'earth',)  # etc.
>   print Weekdays.sun == Solar_system.sun
>
> so that's another shortcoming with the PEP.

I think it does, doesn't it? From the PEP:

"Values within an enumeration cannot be meaningfully compared *except
with values from the same enumeration*.  The comparison operation
functions return ``NotImplemented`` [#CMP-NOTIMPLEMENTED]_ when a
value from an enumeration is compared against any value not from the
same enumeration or of a different type." (my emphasis)



From shirow at gmx.net  Fri Feb 17 07:48:14 2006
From: shirow at gmx.net (Daniel Marcel Eichler)
Date: Fri, 17 Feb 2006 13:48:14 +0100
Subject: getting the line just before or after a pattern searched
In-Reply-To: <1140146668.313276.91380@g43g2000cwa.googlegroups.com>
References: <1140146668.313276.91380@g43g2000cwa.googlegroups.com>
Message-ID: <200602171348.15319.shirow@gmx.net>

s99999999s2003 at yahoo.com wrote:

>i have a file something like this
>
>abcdefgh
>ijklmnopq
>12345678
>rstuvwxyz
>.....
>.....
>.....
>12345678
>.....
>
>whenever i search the file and reach 12345678, how do i get the line
>just above and below ( or more than 1 line above/below) the pattern
>12345678 and save to variables? thanks

source = file(bla).read().split('\n')
for i, line in enumerate(source):
	if line == '12345678':
		print '\n'.join( source[i-1:i+1] )

Something like this, for example. Of course, you must also secure that i-1 
isn't smaller than zero.


mfg

Daniel


From sam at nuevageorgia.com  Tue Feb 14 10:57:54 2006
From: sam at nuevageorgia.com (SamFeltus)
Date: 14 Feb 2006 07:57:54 -0800
Subject: Embedding an Application in a Web browser
In-Reply-To: <1139932108.356041.155100@g14g2000cwa.googlegroups.com>
References: <1139930045.408507.151440@g43g2000cwa.googlegroups.com>
	<1139932108.356041.155100@g14g2000cwa.googlegroups.com>
Message-ID: <1139932674.447510.213520@o13g2000cwo.googlegroups.com>

Perhaps IronPython could be hacked in somehow also?  Seems like it
might could.



From varunhiremath at iitm.ac.in  Fri Feb 24 13:42:22 2006
From: varunhiremath at iitm.ac.in (Varun Hiremath)
Date: Sat, 25 Feb 2006 00:12:22 +0530
Subject: KPanelApplet using Python
In-Reply-To: <1140803759.213567.229980@e56g2000cwe.googlegroups.com>
References: <mailman.2391.1140782029.27775.python-list@python.org>
	<1140803759.213567.229980@e56g2000cwe.googlegroups.com>
Message-ID: <20060224184222.GB17255@localdomain>

On Fri, 24 Feb, 2006 at 09:55:59AM -0800, David Boddie wrote:
> Varun Hiremath wrote:
> 
> > I was wondering if there is any way to make KDE PanelApplets
> > using Python. I have made a small window using Qt, kdeui nad
> > kdecore libs. Now I want to add it to the KDE kicker. Can I
> > get any help regarding this matter.
> 
> The other responses in this thread have covered solutions that use
> the system tray, and you may want to try something like that with
> the KSystemTray class in kdeui. It's available in PyKDE, so you
> shouldn't have any trouble adding new items to kicker that way.
> 
> However, you asked specifically about Panel Applets. Unfortunately,
> they are a lot more difficult to implement in Python because you
> need to write a library in C++ to load them. Some of us in the
> PyQt/PyKDE community did some work towards that, and had working
> applets but, as far as I know, they don't work with recent releases.
> 
> You might get some additional help or advice about this if you try
> mailing the PyKDE list:
> 
> http://mats.imk.fraunhofer.de/mailman/listinfo/pykde
> 
> Good luck!
> 
> David

Hi,
Actually I want to fetch some text from a HTML Page and then display it using KPanelApplet.I am using BeautifulSoup for Parsing the HTML Page which I can do easily in Python . Now I don't want to switch to C++ because Parsing there will be tough. Can you suggest me some other way to do this.

Thank You


> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list

-- 
-----------------------------------------------
Varun Hiremath
461, Jamuna Hostel
IIT Madras,
Chennai - 600 036
mob : +919840299732
-----------------------------------------------
My Webpage : http://www.ae.iitm.ac.in/~ae03b032
-----------------------------------------------


From anonymityisavirtue at 1111011010011.com  Thu Feb  9 01:20:05 2006
From: anonymityisavirtue at 1111011010011.com (TheSmokingGnu)
Date: Wed, 08 Feb 2006 22:20:05 -0800
Subject: Uses of The 4th Dimension (New Discovery by The Human Race!)
In-Reply-To: <44tjtkF3rfjuU2@individual.net>
References: <1139317832.965864.129160@g43g2000cwa.googlegroups.com>
	<3jcGf.79$KY2.42@fe04.lga> <44tjtkF3rfjuU2@individual.net>
Message-ID: <waBGf.277$lw5.124@fe03.lga>

Walter Mitty wrote:
> 
> 
> Jesus. I misread "clock" there for a minute taking into account the
> context. Yeuckkk.
> 

Heh. Don't tell me you've got dirty clocks, too?

TheSmokingGnu


From rupole at hotmail.com  Thu Feb 16 20:09:29 2006
From: rupole at hotmail.com (Roger Upole)
Date: Thu, 16 Feb 2006 20:09:29 -0500
Subject: Seaching Active Directory via ADO
References: <g_7Jf.33401$0H1.22606@trnddc04>
	<1140138661.484502.86380@f14g2000cwb.googlegroups.com>
	<56aJf.78250$_D1.4370@trnddc03>
Message-ID: <1140142239_1425@sp6iad.superfeed.net>

Here's a short example that uses ADO to search for a
user by wildcard.

import win32com.client
c = win32com.client.Dispatch("ADODB.Connection")
c.Open("Provider=ADSDSOObject")

rs,rc=c.Execute("""
SELECT adspath, title, name
>From 'LDAP://DC=yourdomain, DC=COM'
where objectClass='user' and name='Roger*'
""")

while not rs.EOF:
    for f in rs.Fields:
        print f.Name, f.Value
    rs.MoveNext()

    hth
          Roger

"LittlePython" <LittlePython at lost.com> wrote in message
news:56aJf.78250$_D1.4370 at trnddc03...
> Thanks but I was looking more for ADO com object than ADSI or ldap.
> For some strange reason it is very hard to locate any working scripts that
> use ADO  to connect and search AD. Is there an issue with ADO and python
> when connecting to AD?
> I have try to build one myself with no luck. I think my problem is with
> adodb.command calls.
>
> Thanks for your response.
>
> "alex23" <wuwei23 at gmail.com> wrote in message
> news:1140138661.484502.86380 at f14g2000cwb.googlegroups.com...
> > Heya,
> >
> > There are a couple of examples on the O'Reilly site. These two are
> > taken from 'Active Directory Cookbook', the first uses a COM object
> > while the second uses a native LDAP module:
> >
> >
>
http://www.rallenhome.com/books/adcookbook/src/18.6-rootdse_python_com.py.tx
> t
> >
>
http://www.rallenhome.com/books/adcookbook/src/18.6-rootdse_python_ldap.py.t
> xt
> >
> > This might give you a start.
> >
> > - alex23
> >
>
>



----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----


From john_zenger at yahoo.com  Mon Feb 20 12:11:09 2006
From: john_zenger at yahoo.com (John Zenger)
Date: Mon, 20 Feb 2006 12:11:09 -0500
Subject: Processing text using python
In-Reply-To: <1140451760.998278.90430@g43g2000cwa.googlegroups.com>
References: <1140451760.998278.90430@g43g2000cwa.googlegroups.com>
Message-ID: <PpudnXVC4q-DZWTeRVn-ig@comcast.com>

If you have already read the string into memory and want a convenient 
way to loop through it 3 characters at a time, check out the "batch" recipe:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/303279

It uses itertools to make an iterator over the string, returning 3 
characters at a time.  Cool stuff.


nuttydevil wrote:
> Hey everyone! I'm hoping someone will be able to help me, cause I
> haven't had success searching on the web so far... I have large chunks
> of text ( all in a long string) that are currently all in separate
> notebook files. I want to use python to read these strings of text,
> THREE CHARACTERS AT A TIME. (I'm studying the genetic code you see, so
> I need to read and analyse each sequence one codon at a time
> effectively.) Does anyone have any idea of how to do this using python?
> 
> 
> I'm going to be optimistic and thank you for your help in advance!
> Samantha.
> 


From bdesth.quelquechose at free.quelquepart.fr  Mon Feb 13 18:36:47 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 14 Feb 2006 00:36:47 +0100
Subject: [OT]Another n00b: Removing the space in "print 'text', var"
In-Reply-To: <Xns97699A2539C80rzed@208.49.80.253>
References: <43efb1ba$0$14855$c3e8da3@news.astraweb.com>
	<43f05016$0$1408$626a54ce@news.free.fr>
	<Xns97699A2539C80rzed@208.49.80.253>
Message-ID: <43f0f84a$0$3212$636a55ce@news.free.fr>

Rick Zantow a ?crit :
> bruno at modulix <onurb at xiludom.gro> wrote in
> news:43f05016$0$1408$626a54ce at news.free.fr: 
> 
> 
>>HappyHippy wrote:
>>
(snip)
>>>eg.
>>>strName = 'World'
>>>print 'Hello', strName, ', how are you today?'
>>
>>Already got an anwser, now just a coding-style suggestion: hungarian
>>notation is *evil*. And even *more* evil with a dynamically-typed
>>language. 
>>
> 
> <OT>
> Although I agree with you in part (about the horror that is often called 
> "Hungarian notation"), 
(snip)
> 
> However, that is not how Hungarian notation was meant to be used. 
> Instead, the prefix was to indicate the function of the variable, not 
> its datatype. 

I know that. But:
1/ 99% of the developpers using (ms-perverted) hungarian notation ignore 
  this fact
2/ the name itself should be a clear enough indication of the [role, 
function, intended use] of the variable (<pedantic>well, of the object 
bound to that name in fact</pedantic>)
3/ see below...
4/ see below...

> Thus, ctrXXX would be a counter (according to some 
> hypothetical coding standard).

or a controller, according to some other hypothetical coding standard...

3/ prefixing (instead of suffixing) breaks readability.
compare :
- hit_counter
- hit_controller
- ctrHit

Which one do you find the most readable ? Clearly, prefixing (vs 
suffixing) puts things in the wrong order. And clearly, a three letters 
abbrev gives less information than a word.

(snip)

> In the HappyHippy example, the 'str' prefix does coincide with Python's 
> indicator of a string class, as it happens.

as it happens... cf /1

> It is not clear that it need 
> be more than coincidence, though. 

Which, given /1, is enough to confuse the situation. Ho, my, does this 
prefix means that it's supposed to be a string, or is it mere 
co?ncidence ? And if so, what is this 'str' prefix supposed to mean ?

So much for readability...

> A string of bytes need not be of class 
> str, and text need not be contained in a Python str, but the 'str' 
> prefix could easily be attached to anything that indicated strung-
> together data under some coding standard or another. 
 >
> Specifically, it 
> wouldn't bother me greatly to discover that strXXX contained a normal 
> Python string at some point and a Unicode string at another -- the 
> function of strXXX would be the same in either case.


4/ Well, I'm afraid that 'strung-together data' is more a type 
indication than a 'function' indication. And what should I say about 
byte string or Unicode...


> Dealing with the contents of strXXX might be a problem, of course, but 
> that would also be true whenever the datatype of its contents could 
> vary, regardless of its name. In a dynamic language, that variance could 
> easily happen, which appears to be the basis for your "even *more* 
> evil" comment. 

Of course.

> Appending a pseudotype prefix to an object's name doesn't 
> fix the situation, but it doesn't really make it worse.

Yes it does. How do you like:

strAnswer += 42


> A prefix of 
> 'str' should be enough to warn a maintainer not to assume the field  is
> an accumulator or a function name,

A maintainer should not assume much IMHO. Heck, a function *name* is a 
string, isn't it ? And BTW, if, following some weird naming convention, 
the 'str' prefix was used to indicate 'strung-together-data', it could 
as well be used for any sequence(strung-together-data) - in which case 
it could be used for an accumulator !-)

> and maybe a little more than that, 
> but in any event, in any language, the only sure way to know how an 
> object is being used is to examine its context in the source.

So what's the use of prefixing it's name with distracting information ?

(snip)

> Now it could be that I'm misinterpreting your objection to Hungarian 
> notation. 

I'm afraid my objections to HN are nothing new.

> If so, I'd be interested in hearing what it is. 

Then you're done. To summarize:
- it's useless
- it's distracting
- it can be misleading
- it doesn't help readability

According to Python's zen:
- Beautiful is better than ugly.
- Readability counts.
- In the face of ambiguity, refuse the temptation to guess.

> Although I 
> don't imagine any of this is actually on topic in the Python group.

oops ! Sorry y'all

> </OT>



From aleaxit at yahoo.com  Sat Feb 11 12:07:43 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sat, 11 Feb 2006 09:07:43 -0800
Subject: appending to a list via properties
References: <1139605443.823899.141260@g47g2000cwa.googlegroups.com>
	<1139670699.632590.148760@g14g2000cwa.googlegroups.com>
Message-ID: <1hal7v6.1pa7ijfg3np46N%aleaxit@yahoo.com>

Carl Banks <invalidemail at aerojockey.com> wrote:
   ...
> >     class better_list (list):
> >         tail = property(None, list.append)
> 
> This is an impressive, spiffy little class.

Yes, nice use of property.

> growing_lists = foo,qux
> while some_condition:
>     for (s,x) in zip(growing_list,calculate_something()):
>         list.append(s,x)
> 
> No I don't really recommend it.

Why not?  Seems OK.  Maybe simplified to:

while some_condition:
    for alist, anitem in zip((foo, qux), calculate_something()):
        alist.append(anitem)

If you want to hoist for performance, you can hoist more:

appenders = foo.append, qux.append
while some_condition:
    for appender, anitem in zip(appenders, calculate_something()):
        appender(anitem)


Alex


From levicc00123 at gmail.com  Thu Feb  2 19:16:59 2006
From: levicc00123 at gmail.com (Levi Campbell)
Date: 2 Feb 2006 16:16:59 -0800
Subject: would it be feasable to write python DJing software
Message-ID: <1138925819.465108.181760@o13g2000cwo.googlegroups.com>

Hi, I'm thinking about writing a system for DJing in python, but I'm
not sure if Python is fast enough to handle the realtime audio needed
for DJing, could a guru shed some light on this subject and tell me if
this is doable or if I'm out of my fscking mind?



From aleaxit at yahoo.com  Mon Feb 20 11:59:22 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 20 Feb 2006 08:59:22 -0800
Subject: number ranges
References: <e86a5fd00602131854s73191cbbu742d4434ad074908@mail.gmail.com>
	<1139945386.3346.38.camel@pc1.cole.uklinux.net>
	<43F8D881.5030804@sympatico.ca>
	<gfmdnZrrLeHK22TenZ2dnUVZ_tCdnZ2d@comcast.com>
	<43F97AA8.50005@REMOVEMEcyber.com.au>
	<3_WdnUP9qr9XRmTenZ2dnUVZ_sydnZ2d@comcast.com>
Message-ID: <1hb1umb.wr2hsk1chby86N%aleaxit@yahoo.com>

John Zenger <john_zenger at yahoo.com> wrote:
   ...
> > for i in 2 to 5:
> >     print i,
> > 
> > which would print 2 3 4 5
> 
> This proposed syntax is also easy to understand, maybe more than "..",
> because it uses natural language.  The only criticism is that it creates
> a list without using [] notation.  How about [2 to 5]?

Having this hypothetical notation create a list (rather than a genexp)
would qualify as a blooper of the first magnitude. Historically, 'range'
was introduced before anything but a list was an option, so it had to be
grandfathered in (and doesn't use any [] either, BTW), but eventually
(in 3.0) it will return an iterator (as will methods keys/values/items
of dicts, and so forth).

If such notation was ever to appear in Python (and it won't, in part for
reasons I expand on below), it would surely be '(2 to 5)' and return an
iterator equivalent to what you could get today as iter(xrange(2,5)).

> > (I'm open to arguments that it should be more Pythonic and less 
> > mathematical, and halt at 4.)
> 
> I am also open to such arguments but it will be tough to convince me 
> that "x to y" should mean something different from what it means in 
> Pascal, BASIC, and English.

Andrew Koenig, in "C traps and pitfalls" (a great book), did a great job
explaining why semi-open intervals (lower bound included, upper bound
excluded) are vastly preferable. The common sloppy practice of including
both bounds leads to frequent "off by one" errors, also known as
"fencepost errors", which often occur in English too -- check out the
origin of the error's name, e.g. at
<http://catb.org/~esr/jargon/html/F/fencepost-error.html> .

Natural language has many ambiguities and subtle error-inducing traps
(indeed, being able to say something which means different things to
different people may have survival value for the crafty user of
language, so it can be argued that these traps and ambiguities are
adaptive;-). No reason for programming languages, or other formal
languages, to follow natural language down this destructive path.

In any case, the point is crucial: since Python will never do something
as abysmal as introducing a closed interval rather than a semiopen one,
the same kind of people who now long for '2 to 5' (unlikely to have
pondered Koenig's arguments, etc) will never be happy anyway, so it's
much better to avoid introducing '2 to 5' at all.


Alex



From sybrenUSE at YOURthirdtower.com.imagination  Tue Feb 21 02:22:36 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Tue, 21 Feb 2006 08:22:36 +0100
Subject: deriving from float or int
References: <1140502954.660120.174160@g14g2000cwa.googlegroups.com>
Message-ID: <slrndvlfts.9se.sybrenUSE@schuimige.unrealtower.org>

Russ enlightened us with:
> Does it ever make sense to derive a class from a basic type such as
> float or int? Suppose, for example, that I want to create a class
> for physical scalars with units.

That makes sense.

> I thought about deriving from float, then adding the units. I played
> around with it a bit, but it doesn't seem to work very well. Am I
> missing something here? Thanks.

Yeah, you forgot to include a magical 'make the reader psychic' text
;-)

An explanation of what you did and what went wrong would be useful in
answering your question.

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From case.nelson at gmail.com  Tue Feb  7 12:06:09 2006
From: case.nelson at gmail.com (snoe)
Date: 7 Feb 2006 09:06:09 -0800
Subject: Too Many if Statements?
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
Message-ID: <1139331969.228455.40200@g44g2000cwa.googlegroups.com>

slogging_away wrote:
> Hi - I'm running Python 2.4.2 (#67, Sep 28 2005, 12:41:11) [MSC v.1310
> 32 bit (Intel)] on win32, and have a script that makes numerous checks
> on text files, (configuration files), so discrepancies can be reported.
>  The script works fine but it appears that I may have hit a wall with
> 'if' statements.
>
> Due to the number of checks perfromed by the script on the text files,
> (over 500), there are quite a few 'if' statements in the script, (over
> 1150).  It seems that it is at the point that when I add any additional
> 'if' statements the script will not run.  No error is produced - it
> just returns to the python prompt much the same as when a successful
> 'Check Module' command is selected.  If I delete some other 'if'
> statements the new ones work so it appears that it has hit a limit on
> the number of 'if' statements.  This has stunted any further checks for
> the script to make on the text files.
>
> Hs anyone ever run into this sort of thing?

I can't say I've run into it before but your description makes me think
there are other approaches you could take. Does splitting the large
number of if statements into separate functions help at all?
If you're checking some text to see if a number of static strings are
contained therein, you could put the test strings into a list and loop
through...something like this (untested):

tests = [
'looking for this string',
'and this one',
'am i in the text'
] # etc...

for test in tests:
    if test not in text:       
        raise LookupError



From epost2 at gmail.com  Sun Feb  5 11:09:29 2006
From: epost2 at gmail.com (epost2 at gmail.com)
Date: 5 Feb 2006 08:09:29 -0800
Subject: Learning Python
In-Reply-To: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
Message-ID: <1139155769.584780.65050@g14g2000cwa.googlegroups.com>

try:

x = raw_input("Please enter your name: ")



From chris.monnet at gmail.com  Tue Feb 21 04:08:49 2006
From: chris.monnet at gmail.com (Chris)
Date: 21 Feb 2006 01:08:49 -0800
Subject: DCOracle2: OCI error
Message-ID: <1140512929.421047.182510@o13g2000cwo.googlegroups.com>

Hello

I'm using DCOracle2 with Python 2.1 and Oracle 8.1.7 on Solaris and
while it's working most of the time, I have random ORA-01084 invalid
argument in OCI call errors that occur on INSERT.
Out of 18000 queries all using the same DB connection I have like 15
errors of this type. It's always the same SQL queries (2 different
INSERT and some other SELECT), only the parameters change and they're
always valid. When the error occur I can simply retry the statement and
it works, so nothing's wrong with the query and its parameters.
If I launch all the queries again the errors will occur again but never
at the same place, it's really random except for the fact that it only
occurs on INSERT.
There are commits after each INSERT. When I have an ORA-1084 I rollback
and go on with the next queries and they work.

So I'm thinking it may be a bug in DCOracle2.
I've activated the DCOracle traceback and I've noticed that the error
always occurs on the binding of NULL (None) values.
My guess at the moment is that the bindObject function in dco2.c should
return 0x00000000 for bind->valuep when the value is None and indeed
it's what it does most of the time but when the error occurs I can see
in the traceback that 0xffffffff is returned and this make the
following call to OCIBindByPos fail with the above error.
Why would 0xffffffff be returned? Any help on this is appreciated.
I'm especially interested in the inner working of dco2.c OCI calls so I
can investigate more because for now I'm stuck.
I'll try to add disconnect / reconnect every now and then to see if it
helps.

Regards
Chris



From duncanm255 at hotmail.com  Tue Feb 28 15:31:03 2006
From: duncanm255 at hotmail.com (D)
Date: 28 Feb 2006 12:31:03 -0800
Subject: Thread Question
In-Reply-To: <1209cbiq1kjbh06@corp.supernews.com>
References: <1141155072.500444.215130@v46g2000cwv.googlegroups.com>
	<1209cbiq1kjbh06@corp.supernews.com>
Message-ID: <1141158663.553406.303780@t39g2000cwt.googlegroups.com>

Thanks, Grant.  I apologize for not being clear on what I meant by
using "classes".  This is an example of what I was referring to:
http://www.wellho.net/solutions/python-python-threads-a-first-example.html

See the second (threaded) example.  

Doug



From rphillips at engineer.co.summit.oh.us  Wed Feb 15 07:18:03 2006
From: rphillips at engineer.co.summit.oh.us (paron)
Date: 15 Feb 2006 04:18:03 -0800
Subject: Embedding an Application in a Web browser
References: <1139930045.408507.151440@g43g2000cwa.googlegroups.com>
	<1140004056.893486.291280@g44g2000cwa.googlegroups.com>
Message-ID: <1140005883.379440.138950@z14g2000cwz.googlegroups.com>

I forgot -- I like the idea of Kerrigell, too. It runs on top of
CherryPy, and lets you use python either in the server (which is just a
little program on your local machine) or embedded in the html pages, or
in a Kerrigell service, which is an application server based on Python.

So, a script to print the squares of numbers from 1 to 9 looks like:

Python script +++++++++

print "<h1>Squares</h1>"
for i in range(10):
    print "%s :<b>%s</b>" %(i,i*i)


Karrigell service ++++++++

def index():
    print "<h1>Squares</h1>"
    for i in range(10):
        print "%s :<b>%s</b>" %(i,i*i)

HTML Inside Python +++++++

"<h1>Squares</h1>"
for i in range(10):
    "%s :<b>%s</b>" %(i,i*i)

Python Inside HTML +++++++

<h1>Squares</h1>
<%
for i in range(10):
    print "%s :<b>%s</b>" %(i,i*i)
%>

It's certainly flexible.

As far as your animated shapes go, you have a number of unattractive
options!

    Flash (my preference, if you already have the authoring software,)
    openLazslo (maybe the best bet for free),
    SVG (which requires a plug-in for IE,) or
    creating them and making them interactive with Javascript ( see
http://www.walterzorn.com/jsgraphics/jsgraphics_e.htm )

Ron



From max at alcyone.com  Mon Feb 13 21:27:40 2006
From: max at alcyone.com (Erik Max Francis)
Date: Mon, 13 Feb 2006 18:27:40 -0800
Subject: how do you pronounce 'tuple'?
In-Reply-To: <mailman.1857.1139863723.27775.python-list@python.org>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
	<mailman.1857.1139863723.27775.python-list@python.org>
Message-ID: <ieGdnftVlNuA3WzenZ2dnUVZ_t2dnZ2d@speakeasy.net>

Terry Hancock wrote:

> I doubt that helps much: I pronounce all of those words
> (when I use them, which is not too often) as "-toopel". The
> only tuple I pronounce with the "-uh-" is "couple", and I
> usually call that a "two-tuple" when dealing with Python.

I prefer the name _pair_ :-).

> I suspect that even those who would pronounce 'quintuple'
> "kwintuhpel" would say 'quintuplicate' as "kwinTOOPlikuht".
> (that's the noun, not the verb, which is "kwintoopliKATE").

Yeah.  The short form is that both are right and which one is more 
common is probably regional more than anything.  I've heard people say 
_toople_ vs. _tuhple_, but I've never heard anyone say _quintoople_ vs. 
_quintuhple_ (granted, not that the situation arises all that often).

But come to think of it, it kind of does.  I've heard _quintuhplet_ and 
_sextuhplet_ and the like plenty of times, and I've never heard it 
pronounced the other way (in General American).  m-w.com shows something 
interesting here -- the first listed pronunciation for _quintuple_ is oo 
with uh being an alternate, but the first listed pronunciation for 
_quintuplet_ is uh with oo being an alternate.  Which probably goes to 
emphasize that that it's just whatever you're used to and there's no 
rhyme or reason to any of it.

> So what's a 1-element tuple, anyway? A "mople"?  "monople"?
> It does seem like this lopsided pythonic creature (1,) ought
> to have a name to reflect its ugly, newbie-unfriendly
> nature.

In mathematics there's really no such entity such tuples involve 
elements of cartesian products of sets, and so if there are no cartesian 
products involved you're just talking about an element of a set, which 
is just a thing.

Of course that's still a completely valid construct in Python so the 
question stands.  If a 4-tuple is a quadruple, a 3-tuple is a triple, a 
2-tuple is an pair, then I guess a 1-tuple would be a single.  Granted 
that's not nearly as gruesome enough a name to go with the special 
lopsided Pythonic creature mentioned above.  I suggest we name it a 
hurgledink.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   Whatever it is you came to teach me / I am here to learn it
   -- India Arie


From bonono at gmail.com  Mon Feb 20 21:12:15 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 20 Feb 2006 18:12:15 -0800
Subject: how to break a for loop?
In-Reply-To: <1140476451.649515.127230@g44g2000cwa.googlegroups.com>
References: <1140476451.649515.127230@g44g2000cwa.googlegroups.com>
Message-ID: <1140487935.870851.271820@g43g2000cwa.googlegroups.com>


Gregory Petrosyan wrote:
>I need to remove zeros from
> the begining of list, but I can't :-(.

I believe the following is almost a direct translation of the above
sentence.

import itertools as it
a=[0,0,0,1,0]
a[:]=it.dropwhile(lambda x: x is 0, a)



From oliphant.travis at ieee.org  Mon Feb  6 17:20:22 2006
From: oliphant.travis at ieee.org (Travis Oliphant)
Date: Mon, 06 Feb 2006 15:20:22 -0700
Subject: cannot install scipy
In-Reply-To: <ds1hs0$1c5$1@sea.gmane.org>
References: <1139013871.122256.202130@g43g2000cwa.googlegroups.com>
	<ds1hs0$1c5$1@sea.gmane.org>
Message-ID: <ds8i36$30i$1@sea.gmane.org>

Robert Kern wrote:
> nitro wrote:
> 
>>Hi,
>>
>>I am using a Debian system. I installed NumPy and everything works
>>well. When I try to install SciPy, I get the following error. Any help
>>would be appreciated.
>>
>>===
>>idf at server1:~/scipy/scipy-0.4.4$ python setup.py install
>>import core -> failed:
>>/usr/lib/python2.3/site-packages/numpy/core/multiarray.so: undefined
>>symbol: PyOS_ascii_strtod
>>import random -> failed: 'module' object has no attribute 'dtype'
>>import lib -> failed:
>>/usr/lib/python2.3/site-packages/numpy/core/multiarray.so: undefined
>>symbol: PyOS_ascii_strtod
>>Fatal Python error: can't initialize module lapack_lite
>>Aborted
>>idf at server1:~/scipy/scipy-0.4.4$

Actually, the numpy install did not go well.  Try

 >>> import numpy

from a standard Python shell.

It looks like you are using Python 2.3 and NumPy 0.9.4 built without the 
required Python 2.3 patch.

-Travis



From python at rcn.com  Mon Feb  6 20:45:38 2006
From: python at rcn.com (Raymond Hettinger)
Date: 6 Feb 2006 17:45:38 -0800
Subject: datetime object from string
References: <mailman.1528.1139272280.27775.python-list@python.org>
Message-ID: <1139276738.425589.169530@f14g2000cwb.googlegroups.com>

Douglas Douglas wrote:
> Hi everybody.
>
> I need to create a datetime object from a string like "20/01/2005 15:10:01". I
> know the mxDateTime module can do this with the DateTimeFrom method, but I was
> wondering if is possible to do this using only the standard library.
>
> I read the datetime object reference but didn't find a method that does it
> directly.
>
> Is it possible to do it with the standard library?

Here's one way:

>>> import time, datetime
>>> s = '20/01/2005 15:10:01'
>>> time_tuple = time.strptime(s, "%d/%m/%Y %H:%M:%S")
>>> datetime.datetime(*time_tuple[:6])
datetime.datetime(2005, 1, 20, 15, 10, 1)

http://docs.python.org/lib/datetime-datetime.html
http://docs.python.org/lib/module-time.html

Raymond



From http  Wed Feb 22 05:11:23 2006
From: http (Paul Rubin)
Date: 22 Feb 2006 02:11:23 -0800
Subject: cookielib
References: <1140602092.438615.69450@f14g2000cwb.googlegroups.com>
Message-ID: <7xu0arhfec.fsf@ruckus.brouhaha.com>

"sri2097" <srikar2097 at gmail.com> writes:
> Hi, I need to get to a particular page in a website. The site uses
> cookeis and naturally I had to use cookielib since urllib2 does not
> support cookies.

It's poorly documented but urllib2 does support cookies now.

http://docs.python.org/lib/http-cookie-processor.html


From hinnc at yahoo.com  Tue Feb  7 12:14:16 2006
From: hinnc at yahoo.com (slogging_away)
Date: 7 Feb 2006 09:14:16 -0800
Subject: Too Many if Statements?
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<43e8d21b$0$32168$626a54ce@news.free.fr>
	<1139332178.557744.73030@g47g2000cwa.googlegroups.com>
Message-ID: <1139332456.552267.94510@f14g2000cwb.googlegroups.com>

Ah!  I see what you are saying snoe, (and most likely what bruno at
modulix was recommending).  That technique should provide a workaround
to the direct 'if' approach currently used and also offer some
modularity to the logic as well.

Thank you for pointing me in the right direction - I'll give it a go.



From noway at sorry.com  Sat Feb 25 19:05:53 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Sun, 26 Feb 2006 00:05:53 GMT
Subject: Can optparse do dependencies?
References: <1140885582.311180.120550@i39g2000cwa.googlegroups.com>
	<1140899547.915735.150330@j33g2000cwa.googlegroups.com>
Message-ID: <Bh6Mf.9017$A83.230787@twister1.libero.it>

Raymond Hettinger wrote:

>> I'd like to setup command line switches that are dependent on other
>> switches, similar to what rpm does listed below. From the grammar
>> below we see that the "query-options" are dependent on the query
>> switch, {-q|--query}. Can "optparse" do this or do I have to code my
>> own "thing"? Thanks.
>>
>> QUERYING AND VERIFYING PACKAGES:
>>        rpm {-q|--query} [select-options] [query-options]
>> ...
>>    query-options
>>         [--changelog] [-c,--configfiles] [-d,--docfiles] [--dump]
>>         [--filesbypkg] [-i,--info] [--last] [-l,--list]
>>         [--provides] [--qf,--queryformat QUERYFMT]
>>         [-R,--requires] [--scripts] [-s,--state]
>>         [--triggers,--triggerscripts]
>
> The optparse module doesn't have native support for switch
> dependencies; however, it could likely be done with multiple passes.
> The parse_args() takes an args list as an argument.  Make first pass
> that captures your main query switches, then run another parser on a
> slice of the args list.
>
> For example, capture the main switches on a first pass over the full
> argument list (catching all possible main switches and treating
> everything else as a catchall).  Given, args=['-ql', '--changelog',
> '-d', '-c'], parse out the --changelog and then call another parser
> with args=['-d', '-c'].
>
> This functionality seems useful enough to build into the tool
> directly, so do consider putting a feature request on SourceForge
> (and assign to Greg Ward).

In fact, if we were to request an addition to optparse in this direction, I
think it should add standardized support for the "subcommand pattern", that is
the same command line arrangement that CVS, SVN and other programs uses. rpm
doesn't use it and I consider this an error in UI design (it should really have
been "rpm query --changelog" and similar).
-- 
Giovanni Bajo




From tdwdotnet at gmail.com  Mon Feb 20 05:23:27 2006
From: tdwdotnet at gmail.com (Tim Williams (gmail))
Date: Mon, 20 Feb 2006 10:23:27 +0000
Subject: multiple email recipients
In-Reply-To: <G34524620.220.5733.1@mx-extra.net>
References: <G34524620.220.5733.1@mx-extra.net>
Message-ID: <9afea2ac0602200223q2dc8c652g@mail.gmail.com>

On 20 Feb 2006 01:01:38 -0800, eight02645999 at yahoo.com <
eight02645999 at yahoo.com> wrote:
>
> hi
> i currently am using this email function that can send single email
> address
> [SNIP]
> was wondering how to modify the code so as i can send to multiple email
> recipients using "TO"? thanks.
>


You are making the common mistake of thinking that the header sender and
recipients are the same as the SMTP-envelope sender and recipients,   in
reality they do not have to bear any similarity or relationship :)

You need a single list containing all the recipients by email address,  and
strings containing the text representations of the header From, To and Cc
fields.

There is a module called email,  so beware of calling your function the same
name.  Also,  you may find the email module becomes helpful for building
emails as your function/requirements get more complex.

-----------------------------

SENDER = "you at mydom1.com"
RECIPS =  ["joe at mydom2.com","support at mydom3.com","sales at mydom4.com"]
FROM = '  "you at mydom1.com" <you at mydom1.com> '
TO = " Undisclosed recipients "
CC = " Uknown recipients "

def email(HOST,SENDER, RECIPIENTS, FROM,TO,SUBJECT ,BODY,CC=None):
    import smtplib
   import string, sys
   body = string.join((
   "From: %s" % FROM,
   "To: %s" % TO,
   "Subject: %s" % SUBJECT,
   "CC: %s" % CC,
   "",
   BODY), "\r\n")

   server = smtplib.SMTP(HOST)
   failed =  server.sendmail(SENDER, RECIPIENTS,body)
   server.quit()

----------------------------

HTH :)

--

Tim Williams
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From msoulier at gmail.com  Wed Feb 22 09:50:06 2006
From: msoulier at gmail.com (msoulier)
Date: 22 Feb 2006 06:50:06 -0800
Subject: bunding options
Message-ID: <1140619806.860939.155250@z14g2000cwz.googlegroups.com>

I work at home on Linux desktops, but would like to bundle a
Python/wxPython application for Windows desktops, Linux desktops, etc.
I am currently using py2exe to distribute a zipfile that is then usable
by anyone on win32.

On Linux, a source tarball is available, and the users can sync up with
the various versions of tools that I used (python, wxpython, sqlite,
pysqlite, etc) to run the code, but considering that Python moves so
fast and drops backwards compatibility so fast, what is available on
the Linux desktops is not recent enough.

I would like to be able to compile a Linux version for distribution as
well, perhaps a Mac OSX version too.

If I used Java I could distribute an executable jar file and require
the JRE >= someversion to be installed, and my work would be done.

What options do I have with Python? Can I take an existing app and
generate C code with freeze.py, and build it?

I'm having a hard time arguing against Java with my coworkers due some
of these distribution issues. py2exe saved me on Windows, although it
does require a win32 build host, and I work on Linux.

Suggestions appreciated.

Thanks,
Mike



From jmbc at nospam.fr  Mon Feb 20 15:15:50 2006
From: jmbc at nospam.fr (jean-michel bain-cornu)
Date: Mon, 20 Feb 2006 21:15:50 +0100
Subject: editor for Python on Linux
In-Reply-To: <43F8DA72.8040808@sympatico.ca>
References: <dtai6e$23m$2@ariane.blic.net>
	<chlhv15ktc4u3adv34sgk63tok5vl9j50q@4ax.com>
	<43F8DA72.8040808@sympatico.ca>
Message-ID: <43fa2376$0$1149$7a628cd7@news.club-internet.fr>

> Boa-Constructor is an IDE rather than an editor.  Although it focuses
> on wxPython, it has a good editor.
Yes, some possibilities are pretty good, like for instance the 
findAll/findInFiles keeping the results in a new tab (I never saw this 
elsewhere). Another useful is having the debugger launching the 
application in a separate process, an excellent way to avoid bugs 
pollution coming into the IDE.
rgds
jm


From johnjsal at NOSPAMgmail.com  Mon Feb 13 15:52:06 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 13 Feb 2006 20:52:06 GMT
Subject: how do you pronounce 'tuple'?
In-Reply-To: <mailman.1857.1139863723.27775.python-list@python.org>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
	<mailman.1857.1139863723.27775.python-list@python.org>
Message-ID: <Wj6If.1606$No6.38150@news.tufts.edu>

Terry Hancock wrote:

> So what's a 1-element tuple, anyway? A "mople"?  "monople"?
> It does seem like this lopsided pythonic creature (1,) ought
> to have a name to reflect its ugly, newbie-unfriendly
> nature.
> 
> Are we having fun yet? ;-)

I kind of like 'moople'.  :)


From python at rcn.com  Sat Feb 11 23:16:15 2006
From: python at rcn.com (Raymond Hettinger)
Date: 11 Feb 2006 20:16:15 -0800
Subject: itertools examples
In-Reply-To: <mailman.1768.1139696510.27775.python-list@python.org>
References: <mailman.1768.1139696510.27775.python-list@python.org>
Message-ID: <1139717775.485803.129820@f14g2000cwb.googlegroups.com>

[Felipe Almeida Lessa]
> IMHO, on http://www.python.org/doc/current/lib/itertools-example.html ,
> shouldn't the part
>
> >>> for k, g in groupby(enumerate(data), lambda (i,x):i-x):
> ...     print map(operator.itemgetter(1), g)
>
> be
>
> >>> for k, g in groupby(enumerate(data), lambda (i, x): i-x):
> ...     print [i[1] for i in g]

Both work just fine.  It's a personal choice when to use map() and when
to use a list comprehension.  Since many itertools have the flavor of
map/filter, its use is not out of place in the itertools docs.

Also, the use of map() provided an opportunity to demonstrate
operator.itemgetter().  While not essential to this example, it is
helpful with several other tools (especially those with a key=
argument).  Itertools provide a kind of iterator algebra and
itemgetter() is an essential part of that algebra; hence, it is
appropriate that it be included in itertool examples.

If your taste says otherwise, that's okay.  Program however you want.
If reading the examples helped you understand the toolset, then the
docs accomplished their goal.


Raymond



From bonono at gmail.com  Sun Feb 12 06:20:06 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 12 Feb 2006 03:20:06 -0800
Subject: Is python very slow compared to C
In-Reply-To: <1139742200.155197.245490@g14g2000cwa.googlegroups.com>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
Message-ID: <1139743205.985196.254330@g43g2000cwa.googlegroups.com>


bearophileHUGS at lycos.com wrote:
> Steven D'Aprano>Very slow to do what, compared to what? The decay time
> of the tau meson?<
>
> Probably every answer I can give you is wrong for you, so answering is
> almost useless... In this thread we have already given the most
> pertinent answers to the original question from Diffuse.
> I can show you this page, but I think this is useless too for you:
> http://shootout.alioth.debian.org/gp4/benchmark.php?test=all&lang=python&lang2=ocaml
>

This is even more interesting:

http://shootout.alioth.debian.org/gp4/benchmark.php?test=all&lang=python&lang2=lua

However, to me, the strength of python is the batteries that is
included(and there are more and more coming).



From __peter__ at web.de  Wed Feb  8 12:19:55 2006
From: __peter__ at web.de (Peter Otten)
Date: Wed, 08 Feb 2006 18:19:55 +0100
Subject: breadth first search
References: <43ea2271$1@127.0.0.1> <43EA2474.7010109@plope.com>
Message-ID: <dsd950$62f$02$1@news.t-online.com>

Chris McDonough wrote:

>> Can?Python
>> create list dynamically, I want to implement a program which will read
>> data from a file and store each line into a list, is this possible?
> 
> L = []
> [L.append(line) for line in (open('filename.txt')]

Why would you create two lists, one filled only with None entries just to
throw it away immediately? Don't use list comprehensions just because you
can. 

Here are two sane approaches:

lines = open(filename).readlines()
lines = list(open(filename)) # a bit more generic

Finally, if you want to strip off the trailing newlines, a list
comprehension is in order:

lines = [line[:-1] for line in open(filename, "U")]

Peter



From marcus.tettmar at gmail.com  Sat Feb  4 02:17:36 2006
From: marcus.tettmar at gmail.com (marcus.tettmar at gmail.com)
Date: 3 Feb 2006 23:17:36 -0800
Subject: newbie - script works in PythonWin - fails from Python
References: <1138960717.927268.22640@g44g2000cwa.googlegroups.com>
	<1138961665.684357.78060@g44g2000cwa.googlegroups.com>
	<1138962543.290178.77790@g47g2000cwa.googlegroups.com>
	<pan.2006.02.03.11.04.13.213569@REMOVETHIScyber.com.au>
	<1138978837.557550.144350@f14g2000cwb.googlegroups.com>
	<pan.2006.02.03.17.00.52.965138@REMOVETHIScyber.com.au>
	<1138987137.076549.281530@o13g2000cwo.googlegroups.com>
	<r0i8u152bv38faenq4e3njcck3keem94tk@4ax.com>
Message-ID: <1139037456.420871.59850@g47g2000cwa.googlegroups.com>

Goodness, you're a nice friendly lot aren't you!?  I saw that and I
realise that ActivePython COMES with support for Windows.  But it
doesn't say that it forces scripts you create with it to load modules
you haven't implicitly imported yourself!   It doesn't say that a
script might run in PythonWin but not in the command line python.

************
<duh> From the help system:

-=-=-=-=-=-=-=-
On Windows, ActivePython also includes PyWin32 -- a suite of Windows
tools developed by Mark Hammond, including Win32 API integration,
support for Python ASP, the PythonCOM system and the Pythonwin IDE.
-=-=-=-=-=-=-=- 
************



From mohankhurana at gmail.com  Sun Feb 12 18:54:05 2006
From: mohankhurana at gmail.com (MKoool)
Date: 12 Feb 2006 15:54:05 -0800
Subject: Tracking down memory leaks?
In-Reply-To: <pan.2006.02.12.14.27.02.369270@REMOVETHIScyber.com.au>
References: <1139749861.949765.282310@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.14.27.02.369270@REMOVETHIScyber.com.au>
Message-ID: <1139788445.337193.279050@g43g2000cwa.googlegroups.com>

> How big is the file you are reading in? If it is (say) 400 MB, then it is
> hardly surprising that you will be using 500MB of RAM. If the file is 25K,
> that's another story.

Actually, I am downloading the matrix data from a file on a server on
the net using urllib2, and then I am running several basic stats on it
using some functions that i get from matplotlib.  Most are statistical
functions I run on standard vectors, such as standard deviation, mean,
median, etc.  I do then loop through various matrix items, and then
based on a set of criteria, I attempt to perform a sort of linear
regression model using a few loops on the vectors.

> How are you storing your data while you are processing it? I'd be looking
> for hidden duplicates.

I am storing basically everything as a set of vectors.  For example, I
would have one vector for my X-axis, time.  The other variables are the
number of units sold and the total aggregate revenue from selling all
units.

I am wondering if it's actually urllib2 that is messing me up.  It
could be matplotlib as well, although I doubt it since I do not use
matplotlib unless the statistical significance test I produce indicates
a high level of strength (very rare), indicating to me that the company
has a "winning" product.



From franz.steinhaeusler at gmx.at  Thu Feb 16 09:09:14 2006
From: franz.steinhaeusler at gmx.at (Franz Steinhaeusler)
Date: Thu, 16 Feb 2006 15:09:14 +0100
Subject: OT- wxPython mailing list problems
Message-ID: <ff19v1h1nseuiavisib5aqpjfol4oerl3j@4ax.com>

Sorry about asking here, 
but has anyone experienced, that no 
message can be sent to the mailing list?

Neither with Gmane, nor with Google mail.

I always get this reply:

from MAILER-DAEMON at sunsite.dk

"""
Hi. This is the qmail-send program at sunsite.dk.
I'm afraid I wasn't able to deliver your message to the following
addresses.
This is a permanent error; I've given up. Sorry it didn't work out.

<wxPython-users at lists.wxwindows.org>:
ezmlm-reject: fatal: List address must be in To: or Cc: (#5.7.0)

....
"""
-- 
Franz Steinhaeusler


From deets at nospam.web.de  Sun Feb 26 18:01:11 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 27 Feb 2006 00:01:11 +0100
Subject: Memory allocation in for loops
In-Reply-To: <dtt8fm$2tm$1@news.hispeed.ch>
References: <1134298072.537702.158870@g49g2000cwa.googlegroups.com>
	<CqCdnaHz040sRAHeRVn-vg@comcast.com> <dtt8fm$2tm$1@news.hispeed.ch>
Message-ID: <46eq9nFarkesU1@uni-berlin.de>


> I mean what I really would like is to have something C++ - like "for 
> (int idx = a; idx < b; i++) { .. }" where no internal vector or 
> something like that is allocated but only a few op's on registers are 
> performed; in the whileloop in python the picture is roughly the same 

Use xrange instead - as it is customary for at least python2.1, if not even earlier.


> behind the scenes I guess.. but what about in the forloop? Is python 
> smart enough not to generate an internal vector as it does usually for 
> lists or do I have to apply some modifications (xrange..)? What happens 
> further if I do the following:
> 
> ## 2.1 ##
> 
> def forloop(a,b,lst):
> 
>     for idx in lst.sort():
>         ## ..
>         ## do something
>         ## ..
> 
> #######
> 
> Is the sorting function called in every iteration just to detect that 
> (after the first sorting) it is useless comming back to the loop or does 
> this happen:
> 
> ## 2.2 ##
> 
> def forloop(a,b,lst):
> 
>     lst.sort()
>     for idx in lst:
>         ## ..
>         ## do something
>         ## ..
> 
> #######

The iterable-expression of a for _ in _: is always only evaluated once.

Diez


From kay.schluehr at gmx.net  Mon Feb 20 08:18:39 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 20 Feb 2006 05:18:39 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<yfspsljp321.fsf@oc.ex.ac.uk>
Message-ID: <1140441519.702761.326130@g14g2000cwa.googlegroups.com>

> What's far more interesting to me, however, is that I think there a good
> reasons to suspect python's slowness is more of a feature than a flaw: I'd not
> be suprised if on the whole it greatly increases programmer productivity and
> results in clearer and more uniform code.

Yes, it's Guidos master-plan to lock programmers into a slow language
in order to dominate them for decades. Do you also believe that Al
Quaida is a phantom organization of the CIA founded by neocons in the
early '90s who planned to invade Iraq?

Kay



From joel.hedlund at gmail.com  Thu Feb  9 03:29:55 2006
From: joel.hedlund at gmail.com (Joel Hedlund)
Date: Thu, 09 Feb 2006 09:29:55 +0100
Subject: Replacing curses (Was: Re: Problem with curses and UTF-8)
In-Reply-To: <mailman.1640.1139459886.27775.python-list@python.org>
References: <mailman.1637.1139447073.27775.python-list@python.org>
	<mailman.1640.1139459886.27775.python-list@python.org>
Message-ID: <43EAFD83.7050208@gmail.com>

> The code for handling window resizing isn't jumping out at 
> me but I'll keep looking.

(...jumping out, rather unexpectedly!)

You might be interested in an ongoing discussion that I and Grant Edwards are holding in this newsgroup on the subject "Best way of finding terminal width/height?".

Thread summary:

There's a function that Chuck Blake wrote for detecting the current terminal size, available here:

http://pdos.csail.mit.edu/~cblake/cls/cls.py

You'll only need the first two functions for this task (ioctl_GWINSZ and terminal_size).

To monitor changes in window size, have a look at the signal module (in standard library). You can attach a monitor function to the signal signal.SIGWINCH, like so:

signal.signal(signal.SIGWINCH, report_terminal_size_change)

or, in context:

-------------------------------------------------------------------
#!/usr/bin/python
from cls import terminal_size

current_terminal_size = terminal_size()

_bTerminalSizeChanged = False

def report_terminal_size_change(signum, frame):
    global _bTerminalSizeChanged
    _bTerminalSizeChanged = True

def update_terminal_size():
    global _bTerminalSizeChanged, current_terminal_size
    current_terminal_size = terminal_size()
    _bTerminalSizeChanged = False

signal.signal(signal.SIGWINCH, report_terminal_size_change) 

while True:
    if _bTerminalSizeChanged:
        update_terminal_size()
        print current_terminal_size
----------------------------------------------------------------------

Take care!
/Joel


From iddw at hotmail.com  Mon Feb 13 16:58:04 2006
From: iddw at hotmail.com (Dave Hansen)
Date: Mon, 13 Feb 2006 15:58:04 -0600
Subject: how do you pronounce 'tuple'?
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
	<mailman.1857.1139863723.27775.python-list@python.org>
	<Wj6If.1606$No6.38150@news.tufts.edu> <dsqtq7$mju$1@online.de>
Message-ID: <nhv1v1lslk16i4u2v6ttrdpo0ju9d8h5qn@4ax.com>

On Mon, 13 Feb 2006 22:30:43 +0100 in comp.lang.python, Peter Maas
<peter.maas at somewhere.com> wrote:

>John Salerno schrieb:
>> Terry Hancock wrote:
>> 
>>> So what's a 1-element tuple, anyway? A "mople"?  "monople"?
>>> It does seem like this lopsided pythonic creature (1,) ought
>>> to have a name to reflect its ugly, newbie-unfriendly
>>> nature.
>>>
>>> Are we having fun yet? ;-)
>> 
>> I kind of like 'moople'.  :)
>
>tuples are of latin origin, so one can derive the tuple words
>systematically:
>
>Latin             n-tuple
>---------------------------
>...               ...
>triplex           triple
>duplex            duple
>simplex           simple

When I was in 4th grade, I was taught to count to ten in latin: unos,
duos, trace, quatro, quinque, sex, septem, octem, novem, decem
(assuming the intervening 35 years haven't dimmed my memory too
much...).  This would suggest "untuple" (or one of several
contractions such as "unuple" or "uple").

Though I suspect "single" is correct.  Consider coronary bypass
operations -- single, double, triple, quadruple...

Regards,
                                        -=Dave

-- 
Change is inevitable, progress is not.


From lycka at carmen.se  Wed Feb  1 09:54:18 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 01 Feb 2006 15:54:18 +0100
Subject: Parsing sizes
In-Reply-To: <1138790585.539620.291090@z14g2000cwz.googlegroups.com>
References: <1138790585.539620.291090@z14g2000cwz.googlegroups.com>
Message-ID: <drqi2q$psg$1@wake.carmen.se>

pinkfloydhomer at gmail.com wrote:
> I want to be able to parse sizes in bytes in several formats, such as
> "1048576", "1024K", "1024KB", "1M" etc.
> 
> Is there a module that will help me with that?
> 
> /David
> 

Like this?


import re

units = {'B':0, 'k':10,'M':20,'G':30,'T':40}

def parse(text):
     mo = re.match(r'(\d+)(\w?)', text)
     if mo:
         num = int(mo.group(1))
         size = mo.group(2)
         if size in units:
             num *= 2**int(units[size])
         else:
             return ValueError
         return num
     else:
         raise ValueError

print parse('1B')
print parse('1kB')
print parse('1M')
print parse('1G')
print parse('1T')
print parse('1KB')

(Capital K isn't a proper prefix that I ever heard of.)


From python at rcn.com  Mon Feb  6 17:07:04 2006
From: python at rcn.com (Raymond Hettinger)
Date: 6 Feb 2006 14:07:04 -0800
Subject: Using bytecode, not code objects
References: <mailman.1183.1138496140.27775.python-list@python.org>
	<1138514565.112950.212310@o13g2000cwo.googlegroups.com>
	<d3d66b1c0601291236l691aae57j@mail.gmail.com>
	<mailman.1524.1139262941.27775.python-list@python.org>
Message-ID: <1139263624.553961.236730@g14g2000cwa.googlegroups.com>


Fabiano Sidler wrote:
> 2006/1/29, Fabiano Sidler <fabianosidler at gmail.com>:
> > 28 Jan 2006 22:02:45 -0800, Raymond Hettinger <python at rcn.com>:
> > > But if you want to make your life unnecessarily hard, you can hack the
> > > compiler module just upstream from the creation of the code object --
> > > alter the newCodeObject() method in pyassem.py.
> >
> > Thanks! I think this will help me, because it demonstrates how a code
> > object is to be created (with new.code), although in a very
> > complicated way.
>
> Are you familiar with this module? I don't get the essence of it, even
> with pdb (which I'm surely not using as neatly as it could be). Or is
> there any documentation on it I couldn't find?

The pysassem module is part of the compiler package:

   http://docs.python.org/lib/compiler.html


Raymond



From tjreedy at udel.edu  Mon Feb 27 14:50:44 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 27 Feb 2006 14:50:44 -0500
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local><7xmzgdtjl0.fsf@ruckus.brouhaha.com><4402AB7F.7070804@REMOVEMEcyber.com.au><7xzmkdxkce.fsf@ruckus.brouhaha.com>
	<pan.2006.02.27.11.09.59.508427@REMOVETHIScyber.com.au>
Message-ID: <dtvl6j$g5f$1@sea.gmane.org>


"Steven D'Aprano" <steve at REMOVETHIScyber.com.au> wrote

> A list of X is like a box containing X,

and in another post

> A list is a container.

I think it is misleading, if not wrong, to refer to Python collections as 
'containers', 'boxes', or similar.  A object in a box cannot be in another 
disjoint box.  A object in a box cannot be in the box a second time.  But 
both 'cannot's are 'can's for Python objects in respect to Python 
collections.  So, bad metaphor.

(Yes, CPython implements the association of list positions with objects by 
putting an instance/copy of the id/address of the implemented object 'in' a 
particular position in a block of memory, but even then, the object itself 
in not 'in' the list block.  And that is so because of the need for 
multiple associations for each object.  Beside which, we are discussing the 
abstract notion of the empty enumeration.)

> You can take the elements away and still have the container left.

I would say instead that you have an empty roster ;-)
I suspect that the notion of empty  set was once controversial.
It certainly gives some set theory beginners a pause.

> But an enum is not a container.

But neither, I claim, is a list.  So to me, you have not drawn a 
distrinction, and therefore no justification for different treatment.

To me, the enum proposal is for an immutable ordered set (rather than 
multiset) with a friendly interface.  So, like other posters, I have no 
problem with one that is empty.  I also expect enum() to return such 
because that is GvR policy for builtin type constructors.

To me, 'I can't think of a use for X' is insufficient reason to prohibit X 
in Python.  You also need an 'X is tricky/difficult to implement' or 'X is 
harmful' claim.

Terry Jan Reedy





From max.muxe at maxxly.de  Wed Feb 22 17:30:18 2006
From: max.muxe at maxxly.de (Max Muxe)
Date: Wed, 22 Feb 2006 23:30:18 +0100
Subject: [Python-de] PyUNO with different Python
In-Reply-To: <43FC85CB.3060102@gmx.net>
References: <43FC85CB.3060102@gmx.net>
Message-ID: <000101c637ff$8f223650$c803a8c0@magazinverlag.local>

Am Mittwoch, den 22.02.2006, 16:39 +0100 schrieb Katja S?ss:
> Hi!
> maybe somebody can give me an hint to my problem setting up PyUNO on my 
> Mac to work with my Python not the Python delivered with OpenOffice.
> As said in installation instructions I've set
>    OPENOFFICE_PATH="/usr/lib/openoffice/program"
>    export PYTHONPATH="$OPENOFFICE_PATH"
>    export LD_LIBRARY_PATH="$OPENOFFICE_PATH"
> according to my environment.
> 
Mal eine vieleicht bl?de Frage: Warum schreibst Du hier nicht deutsch?

[...]

Grusz aus der Enklave


_______________________________________________
python-de maillist  -  python-de at python.net
http://python.net/mailman/listinfo/python-de




From ptmcg at austin.rr._bogus_.com  Tue Feb 21 12:05:39 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Tue, 21 Feb 2006 17:05:39 GMT
Subject: Exceptions
References: <1140540154.522838.193020@g14g2000cwa.googlegroups.com>
	<1140540525.032755.209460@g47g2000cwa.googlegroups.com>
Message-ID: <DLHKf.22568$UN2.8151@tornado.texas.rr.com>

"DavidPorterHolt" <DavidPorterHolt at acm.org> wrote in message
news:1140540525.032755.209460 at g47g2000cwa.googlegroups.com...
> Here's the same clip, but run in the command line interpreter. The
> error gives a little more info.
>
> >>> try:
> ...     fsock = open('/notthere')
> ... except IOError:
> ...     print 'The file does not exist, exiting gracefully'
> ... print 'This line will always print'
>   File "<stdin>", line 5
>     print 'This line will always print'
>         ^
> SyntaxError: invalid syntax
> >>>
>
> Thanks,
> David Holt
> DavidPorterHolt at acm.org
>
In the interpreter, after an indented group (such as your except IOError
block), you have to enter a blank line, THEN enter the 2nd print statement:

>>> try:
...     fsock = open('/notthere')
... except IOError:
...     print 'The file does not exist, exiting gracefully'
...
The file does not exist, exiting gracefully
>>> print 'This line will always print'
This line will always print
>>>

(Note the empty ellipsis, indicating a line with no more indention.)

-- Paul




From case.nelson at gmail.com  Fri Feb 10 13:08:24 2006
From: case.nelson at gmail.com (snoe)
Date: 10 Feb 2006 10:08:24 -0800
Subject: is there a better way?
In-Reply-To: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
Message-ID: <1139594904.368362.67310@g14g2000cwa.googlegroups.com>


markscala at gmail.com wrote:
> Problem:
>
> You have a list of unknown length, such as this: list =
> [X,X,X,O,O,O,O].  You want to extract all and only the X's.  You know
> the X's are all up front and you know that the item after the last X is
> an O, or that the list ends with an X.  There are never O's between
> X's.
>
> I have been using something like this:
> _____________________
>
> while list[0] != O:
>     storage.append(list[0])
>     list.pop(0)
>     if len(list) == 0:
>         break
> _____________________
>
> But this seems ugly to me, and using "while" give me the heebies.  Is
> there a better approach?
>
> hope this is clear.
> thanks


There's a few ways to do this, really depends on :

mylist = [1,2,3,4,5,6,0,0,0]

list comprehension (will get ALL non zeros, and strip out all zeros,
but is different from your function):
[x for x in mylist if x != 0]

list slice(same as your function):
mylist[:mylist.index(0)]

Depends what you want to happen if your list is something like:
[1,2,3,0,4,5,6,0,0]
[0,1,2,3,4,5,6]
[0,1,2,3,4,5,6,0]
[1,2,3,4,5,6]



From sybrenUSE at YOURthirdtower.com.imagination  Mon Feb 20 02:52:44 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Mon, 20 Feb 2006 08:52:44 +0100
Subject: Is inifinite loop not a good practice?
References: <mailman.2146.1140420474.27775.python-list@python.org>
Message-ID: <slrndvitac.9md.sybrenUSE@schuimige.unrealtower.org>

Alvin A. Delagon enlightened us with:
> I have to write a python script that would continously monitor and
> process a queue database. [...] I've been planning to do an infinite
> loop within the script to do this but I've been hearing comments
> that infinite loop is a bad programming practice.

I think it's just fine. You could improve it a bit by using something
like:

class Monitor(Thread):
    def __init__(self, *args, **kwargs):
        Thread.__init__(self, *args, **kwargs)
        self.interrupted = False
        
    def run(self):
        while not interrupted:
            monitor()
    
    def interrupt(self):
        self.interrupted = True

> I'm opted to run the script via crontab but I consider it as my last
> resort.

The advantage there is a stability issue. If your program quits,
you've got a problem. Using crontab, the program is started over and
over again, so even if it crashes, it'll be restarted in time for the
next monitor run. Cron has been around for such a long time that the
chance of a crash is much less than with a freshly developed program.

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From larry.bates at websafe.com  Tue Feb  7 08:57:39 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 07 Feb 2006 07:57:39 -0600
Subject: How to I write DBASE files without ODBC
In-Reply-To: <mailman.1483.1139225890.27775.python-list@python.org>
References: <mailman.1483.1139225890.27775.python-list@python.org>
Message-ID: <3KSdnf5YzsbbOnXenZ2dnUVZ_tGdnZ2d@comcast.com>

Durumdara wrote:
> Hi !
> 
> I have a text processor code and I want to put the results to standard
> files.
> HTML, XML, SQLite - they are ok.
> 
> But I want to put these datas to DBF too, because when records are many,
> does not fit in Excel table (load from HTML). XML and SQLite need some
> development to get datas.
> 
> I need some memo fields, not only standard field types. The fixed DBASE
> tables are simply writeable, but for memo I need some tool.
> ODBC is good for this, but I want to create standalone exe, without
> installation, and ODBC must be manually set...
> 
> Can anybody known about DBASE handler module for Python ?
> 
> Thanx for help: dd
> 
> 
> 
We use py2exe and Inno Setup to create a setup.exe installation
program.  Part of the installation in Inno is to create the ODBC
object in the registry that is necessary for the program to access
ODBC data source.  All I did was to observe the changes in the
registry before and after manually setting up a ODBC datasource
and put that code in my Inno script.  Works like a charm.

-Larry Bates


From kent at kentsjohnson.com  Thu Feb  2 17:45:27 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Thu, 02 Feb 2006 17:45:27 -0500
Subject: locals() and dictionaries
In-Reply-To: <1138833843.647435.242870@f14g2000cwb.googlegroups.com>
References: <1138818258.895406.34130@g47g2000cwa.googlegroups.com>
	<drr0oo$2mb$1@news.doit.wisc.edu>
	<1138833843.647435.242870@f14g2000cwb.googlegroups.com>
Message-ID: <43e28768_1@newspeer2.tds.net>

JerryB wrote:
> Rocco:
> thanks for your response. The examples were just made up. I don't
> normally use 'dict' and 'str'.
> I know I can create a dictionary with the variables I want, etc. My
> question is not how to solve the problem, or how to come up with a
> work-around (I'm getting pretty good at this one :), so my question
> stands:
> 
> is it possible to access the individual members of a dictionary using %
> locals() when creating a string?

You might want to use a more powerful templating engine, for example 
http://cheetahtemplate.org/ and probably many others.

Kent


From dbough77 at yahoo.com  Thu Feb 23 17:55:16 2006
From: dbough77 at yahoo.com (DannyB)
Date: 23 Feb 2006 14:55:16 -0800
Subject: Concantenation and string slicing
Message-ID: <1140735316.752278.298490@v46g2000cwv.googlegroups.com>

I've written a program that takes a phrase and spits it back out
backwards.  My problem is it throws each character on a new line.  I'd
like the phrase to be on the same line.  Is this possible?

#Backward Message

message = raw_input("Enter a message:  ")
letter = len(message)
while (letter > 0):
        newMessage = ""
        newMessage += message[letter-1]
        letter -= 1
        print newMessage


Thanks!!

Dan



From 63q2o4i02 at sneakemail.com  Sun Feb 19 14:37:18 2006
From: 63q2o4i02 at sneakemail.com (63q2o4i02 at sneakemail.com)
Date: 19 Feb 2006 11:37:18 -0800
Subject: Python vs. Lisp -- please explain
In-Reply-To: <yfspsljp321.fsf@oc.ex.ac.uk>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<yfspsljp321.fsf@oc.ex.ac.uk>
Message-ID: <1140377838.212996.40470@z14g2000cwz.googlegroups.com>

Great, thanks for a very complete answer.
michael



From martin at v.loewis.de  Wed Feb 15 14:40:36 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 15 Feb 2006 20:40:36 +0100
Subject: file names longer than MAX_PATH under Windows 2003
In-Reply-To: <dsvku5$b39$1@news.rtcomm.ru>
References: <mailman.1956.1140020466.27775.python-list@python.org>
	<dsvku5$b39$1@news.rtcomm.ru>
Message-ID: <43F383B4.2030903@v.loewis.de>

Sergey wrote:
> (but now I must have two pieces of code, one for linux and one for windows)
> Interesting, why developers of python didn't use here all power of win32 API?

It will in Python 2.5.

Regards,
Martin


From robert.kern at gmail.com  Sat Feb  4 01:34:06 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 04 Feb 2006 00:34:06 -0600
Subject: cannot install scipy
In-Reply-To: <UsVEf.7441$MF1.4622@fe08.lga>
References: <1139013871.122256.202130@g43g2000cwa.googlegroups.com>
	<UsVEf.7441$MF1.4622@fe08.lga>
Message-ID: <ds1hst$1c5$2@sea.gmane.org>

John M. Gabriele wrote:

> Why not just "apt-get install python-scipy"?
> 
> That's one of the best parts of running Debian. :)

It's also one of the worst parts of running Debian (speaking as a happy
once-Debian-now-Ubuntu user). In this case, python-scipy is a pretty ancient
version of scipy using the old Numeric, and not the new numpy.

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From robert.kern at gmail.com  Sat Feb  4 01:35:22 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 04 Feb 2006 00:35:22 -0600
Subject: python's library support
In-Reply-To: <1139025112.098122.131330@z14g2000cwz.googlegroups.com>
References: <1139025112.098122.131330@z14g2000cwz.googlegroups.com>
Message-ID: <ds1hv9$1c5$3@sea.gmane.org>

Sean wrote:
> I am a newbie in python, and I have a feeling that python provides less
> library support than perl www.cpan.org  This seems a big discussion
> topic.
> 
> I want to know if there is extensive algorithm library support in
> python. I know there is a pretty neat module in perl to implement graph
> theory. Is there a graph theory module in python?

http://networkx.sourceforge.net

And several others if you google a bit.

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From michaeltaft at gmail.com  Tue Feb  7 05:43:41 2006
From: michaeltaft at gmail.com (mwt)
Date: 7 Feb 2006 02:43:41 -0800
Subject: Code Feedback
In-Reply-To: <slrnduflf8.2t1.grahn+nntp@frailea.sa.invalid>
References: <1139247238.520281.144670@f14g2000cwb.googlegroups.com>
	<slrnduflf8.2t1.grahn+nntp@frailea.sa.invalid>
Message-ID: <1139309021.061106.210990@g43g2000cwa.googlegroups.com>


Jorgen Grahn wrote:
> You might want to look into using doc strings properly. You have comments at
> the start of functions, but they read more like implementation notes than
> "what this method does and why". But I only had a quick look.

Yeah. They were just my scaffolding notes to myself.

I'd hurry up with that Conrad if I were you, and get on with the
Hemingway. ;)



From gabriel.becedillas at gmail.com  Mon Feb  6 16:02:54 2006
From: gabriel.becedillas at gmail.com (gabriel.becedillas at gmail.com)
Date: 6 Feb 2006 13:02:54 -0800
Subject: Replace a module variable with a function call
In-Reply-To: <mailman.1516.1139254298.27775.python-list@python.org>
References: <1139252075.497468.137100@g44g2000cwa.googlegroups.com>
	<mailman.1516.1139254298.27775.python-list@python.org>
Message-ID: <1139259773.970693.19650@g44g2000cwa.googlegroups.com>

Tim and Carsten,
Thank you very much for your replies. I'm afraid this is not going to
work for me (but I'm not 100% sure), coz if I access those modules from
the Python's C API (PyModule_* functions), the PyModule_Check() calls
will fail.
Thanks again.



From johnmc at velseis.com.au  Thu Feb  9 19:18:35 2006
From: johnmc at velseis.com.au (John McMonagle)
Date: Fri, 10 Feb 2006 10:18:35 +1000
Subject: Determining an operating system's default browser
In-Reply-To: <43EBD5E1.1040501@websafe.com>
References: <mailman.1690.1139528346.27775.python-list@python.org>
	<43EBD5E1.1040501@websafe.com>
Message-ID: <1139530715.18246.28.camel@cornell>

On Thu, 2006-02-09 at 17:53 -0600, Larry Bates wrote:
> You don't have to determine it.  Just os.startfile('page1.html')
> and let the OS figure it out.

Works great for Windows - not available on Unix though.



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From Bizarro.M at gmail.com  Thu Feb  9 08:36:48 2006
From: Bizarro.M at gmail.com (Bizarro-02)
Date: 9 Feb 2006 05:36:48 -0800
Subject: Parsing XML scheme (xsd) to python objects
Message-ID: <1139492208.509376.315050@z14g2000cwz.googlegroups.com>

I have a XML scheme (xsd) from which I have created with xjc  (a java
binding compiler (JAXB)) my java objects with all the get and set
methods. Now I have to use this scheme and do the same in python but I
can't find a tool which can read the scheme. I already tried
generateDS.py but it couldn't parse the data.

Does anyone know a tool which compiles my scheme and creates an object
library in python?


Regards,
Matthias



From fredrik at pythonware.com  Tue Feb 21 10:31:50 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 21 Feb 2006 16:31:50 +0100
Subject: Mutable numbers
References: <dteele$9pi$1@home.itg.ti.com><43fb2462$0$3211$636a55ce@news.free.fr>
	<43FB2EC4.50201@holdenweb.com>
Message-ID: <dtfbp6$k16$1@sea.gmane.org>

Steve Holden wrote:

> > The memory allocation for integers is optimized. 'Small' integers
> > (between -5 and 100 IIRC) are allocated once and reused. The memory for
> > larger integers is allocated once and reused whenever possible, so the
> > malloc() overhead is negligible.
>
> The first bit's right, the second bit isn't:
>
>   >>> id(12100)
> 4604168
>   >>> id(121*100)
> 4604204
>   >>>

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/

-- 
http://mail.python.org/mailman/listinfo/python-list





From gh at ghaering.de  Tue Feb 28 13:53:53 2006
From: gh at ghaering.de (=?ISO-8859-1?Q?Gerhard_H=E4ring?=)
Date: Tue, 28 Feb 2006 19:53:53 +0100
Subject: Best python module for Oracle, but portable to other RDBMSes
In-Reply-To: <1141145733.351179.5880@p10g2000cwp.googlegroups.com>
References: <1140818561.458171.237850@p10g2000cwp.googlegroups.com>	<43ff852a$0$11074$636a55ce@news.free.fr>
	<1141145733.351179.5880@p10g2000cwp.googlegroups.com>
Message-ID: <44049C41.1060603@ghaering.de>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

dananrg at yahoo.com wrote:
> What would be the next best Oracle database module for Python next to
> cx_oracle? 

That would probably be DCOracle2.

> I'd like to compare two and choose one, just for the sake of
> seeing how two modules doing the same thing operate.
> 
> Also, does installing cx_oracle create registry entries or require
> admin privs on a Windows XP machine? I see that cx_oracle is
> distributed as an EXE.

It's most probably created using distutils and "python setup.py
bdist_wininst". These installers only use the registry to look up the
path Python where is installed. Of course it will need a correctly
working Oracle client to operate.

- -- Gerhard
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Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org

iD8DBQFEBJxBdIO4ozGCH14RAqXCAJ9Vq6L8SLvnhlBCDc4EzwloJYp28ACfVt8J
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From brian at mirror.org  Fri Feb 17 19:45:10 2006
From: brian at mirror.org (brian at mirror.org)
Date: 17 Feb 2006 16:45:10 -0800
Subject: Print a PDF transparently
In-Reply-To: <1140202841.650774.32920@z14g2000cwz.googlegroups.com>
References: <1140184955.674138.275010@o13g2000cwo.googlegroups.com>
	<11vbpu58sll1b4f@corp.supernews.com>
	<1140190758.951694.231890@f14g2000cwb.googlegroups.com>
	<fk0cv159vg81i62524nvpuueg8q7iorcnk@4ax.com>
	<1140202841.650774.32920@z14g2000cwz.googlegroups.com>
Message-ID: <1140223510.666168.183030@z14g2000cwz.googlegroups.com>


>
> Where can I find how to send a .ps directly to the printer?
>

Have you seen this?
    http://tgolden.sc.sabren.com/python/win32_how_do_i/print.html
In particular, the section on using win32print directly.

Brian.



From zzhikang at hotmail.com  Wed Feb 22 01:25:46 2006
From: zzhikang at hotmail.com (kanchy kang)
Date: Wed, 22 Feb 2006 06:25:46 +0000
Subject: May i customize basic operator (such as 1==3)?
In-Reply-To: <dtgpbb$asm$2@sea.gmane.org>
Message-ID: <BAY108-F85E0B9B4C44B7CAA16D68CDFD0@phx.gbl>

many people write test cases with python scripts.
in these test scripts, there are many validation statements,
for example, in unittest, failUnless(a == b),(a/b may be stringType or 
intType...)

during running test scripts, if there is one exception raised from 
failUnless, i still do not know a =?, b= ?... i have to add one statment 
"print a" or "print b" again...

as i know, there are many validation statements if using python as one test 
tool...
i think my suggestion or requirement may benefit users greatly...

best regards!


>From: Steve Holden <steve at holdenweb.com>
>To: python-list at python.org
>Subject: Re: May i customize basic operator (such as 1==3)?
>Date: Tue, 21 Feb 2006 23:29:30 -0500
>
>kanchy kang wrote:
> > Hi,all
> > as we know, we can override the operator of one object(for example 
>__eq__).
> > my question is, how to override the basic operator?
> > for example,
> >
> > for any object comparison operator(including litterals),
> > for example,
> > a = "123"
> > b = "321"
> >
> > the boolean equation a == b,
> > i need override "==" operator like this:
> > first display a and b
> >
> > then return real boolean result (a == b).
> >
> > thanks!
>
>This isn't going to be possible without modifying the Python
>interpreter, as the operators are implemented as methods of objects, and
>the built-in objects are programmed in C and not in Python.
>
>regards
>   Steve
>--
>Steve Holden       +44 150 684 7255  +1 800 494 3119
>Holden Web LLC                     www.holdenweb.com
>PyCon TX 2006                  www.python.org/pycon/
>
>--
>http://mail.python.org/mailman/listinfo/python-list

_________________________________________________________________
FREE pop-up blocking with the new MSN Toolbar ? get it now! 
http://toolbar.msn.click-url.com/go/onm00200415ave/direct/01/



From larry.bates at websafe.com  Thu Feb  2 17:02:44 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Thu, 02 Feb 2006 16:02:44 -0600
Subject: OS.MKDIR( ) Overwriting previous folder created...
In-Reply-To: <1138916709.368871.174290@z14g2000cwz.googlegroups.com>
References: <1138916342.531311.190570@g14g2000cwa.googlegroups.com>
	<1138916709.368871.174290@z14g2000cwz.googlegroups.com>
Message-ID: <laOdnbcT65HpHH_eRVn-iA@comcast.com>

try os.path.exists(path)

-Larry Bates

Ernesto wrote:
> Ernesto wrote:
>> I couldn't find this with a search, but isn't there a way to overwrite
>> a previous folder (or at least not perform osmkdir( ) if your program
>> detects it already exists).  Thanks !
> 
> I suppose this also leads to the question of:
> 
> "Is there a way to determine if a path exists or not?"  Then I could
> do:
> 
> if(path exists){}
> else{mkdir("")}
> 


From a.schmolck at gmail.com  Sun Feb 19 14:21:42 2006
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: 19 Feb 2006 19:21:42 +0000
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
Message-ID: <yfspsljp321.fsf@oc.ex.ac.uk>

63q2o4i02 at sneakemail.com writes:

> Hi, I've been thinking about Python vs. Lisp.  I've been learning
> Python the past few months and like it very much.  A few years ago I
> had an AI class where we had to use Lisp, and I absolutely hated it,
> having learned C++ a few years prior.  They didn't teach Lisp at all
> and instead expected us to learn on our own.  I wasn't aware I had to
> uproot my thought process to "get" it and wound up feeling like a
> moron.
> 
> In learning Python I've read more about Lisp than when I was actually
> trying to learn it, and it seems that the two languages have lots of
> similarities:
> 
> http://www.norvig.com/python-lisp.html
> 
> I'm wondering if someone can explain to me please what it is about
> Python that is so different from Lisp that it can't be compiled into
> something as fast as compiled Lisp?  

Nothing. Given a sufficiently smart implementation any language can be as fast
as any other -- it might just be a billion times harder to write that
implementation for language A than for language B.

> From this above website and others, I've learned that compiled Lisp can be
> nearly as fast as C/C++, so I don't understand why Python can't also
> eventually be as efficient? Is there some *specific* basic reason it's
> tough? Or is it that this type of problem in general is tough, and Lisp has
> 40+ years vs Python's ~15 years?

I think if you're looking for one single reason, it is presumably that (IIRC)
python was designed on the erronous assumption that dynamically typed
languages have to be slow (and are unsuitable for real applications anyway)
wheras common lisp wasn't. Furthermore the people involved in common lisp were
much more knowledgeable and experienced in things like compiler design and had
a long history of similar languages and various implementations to build upon.

As common lisp and scheme demonstrate you can have high level of dynamism (and
in a number of things both are more dynamic than python) and still get very
good performance (in some cases close to or better than C). But both these
languages have been designed with compiler writers and the generation of fast
code in mind, so they made design decisions to ease writing fast lisp
compilers and programs.

For example:

- python classes (and to some extent modules) are essentially dictionaries
  that you can modify and customize more or less at will at run-time and that
  behave interchangeably in many respects. I'm sure that presents several
  optimization headaches.

  By contrast if the common lisp compiler sees the symbol CL:LIST (usually
  written just LIST, because the CL package is imported by default) it can
  safely assume that it refers to the builtin LIST function, because you're
  not allowed to rebind the function value of functions in the CL package.
  Python can assume no such thing if it comes across ``list`` -- for all it
  knows it might as well be the number 42. Also the package and class system
  are completely separate and although common lisp's OO system is rather more
  powerful than python's it has been designed to be implementable efficiently.

- in python almost everything has to happen at run-time, whereas in common
  lisp you can do things at compile time, load time or run-time e.g:

    - common lisp has a mechanism for making compiler declarations (so you can
      tell the compiler to inline a function, or the type of a variable, or to
      optimize something for speed and not for space etc.)

    - common lisp has macros (proper ones, not C style) which allow you to build
      efficient abstractions

    - common lisp has compiler macros. This sort of means that you can write your
      own compiler optimizations for your functions (i.e. if you know that your
      expensive FOO function is indempotent you could arrange for all calls of the
      form (FOO (FOO A)) to be replaced with simply A, in a similar way as an
      optimizing compiler might replace (a+b+c+d)*0 with 0).

What's far more interesting to me, however, is that I think there a good
reasons to suspect python's slowness is more of a feature than a flaw: I'd not
be suprised if on the whole it greatly increases programmer productivity and
results in clearer and more uniform code.

If you know the language to be dog slow any way, you're much less likely to
waste your time (and that of future maintainers) on the pointless
microoptimizations that geeks so love. Also, since only builtins have
reasonable performance there's added motiviation to become very familiar with
the available builtins (and standard libarary) and far less temptation to roll
one's own version of say dict.setdefault (even if it it sucks). The fact that
non-standard library code is inherently somewhat inferior (because it will
either be written in python and slow or written in C and a pain to install)
adds further incentive to attempt community wide standardization.

I think it's not unreasonable to speculate that all this decreases production,
maintenance and reuse costs of python code considerably, so much in fact that
python's very slowness represents part of its competetive edge over languages
that are in some ways better engineered and more capable.

So ironically, some share of python's success might actually be due to
ignorance on Guido's part (of course python in most respects is a marvellously
well designed language that to my mind places Guido at least on par with the
designers of any contemporary language; I'm just intrigued by the possiblity
that had he known as much about performance issues in very dynamic languages
as say some of the lisp and self people, python might have turned out to be a
faster albeit less popular and productive language).

'as


From lycka at carmen.se  Fri Feb 24 04:11:18 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 24 Feb 2006 10:11:18 +0100
Subject: Unexpected timing results
In-Reply-To: <pan.2006.02.23.22.04.04.778895@REMOVETHIScyber.com.au>
References: <pan.2006.02.23.15.38.11.944281@REMOVETHIScyber.com.au>
	<43FDDDB2.7050703@websafe.com>
	<pan.2006.02.23.22.04.04.778895@REMOVETHIScyber.com.au>
Message-ID: <dtmijn$6uq$1@wake.carmen.se>

Steven D'Aprano wrote:
> It looks like the time function under Linux at least is very slow.

Perhaps you should try doing the same thing in C.
Then you can see whether the problem is in the
wrapper or in the system call.


From jcdentonmail at yahoo-dot-de.no-spam.invalid  Thu Feb 23 07:35:04 2006
From: jcdentonmail at yahoo-dot-de.no-spam.invalid (JCDenton)
Date: 23 Feb 2006 12:35:04 GMT
Subject: computer algebra packages
References: <1118184041.459969.257190@g49g2000cwa.googlegroups.com>
Message-ID: <43fdabf8$0$64490$892e7fe2@authen.yellow.readfreenews.net>

> Rahulwrote:
Hi.
> Well is there an open source computer algebra system written in
python
> or at least having a python interface?
> I know of 2 efforts: pythonica and pyginac...are there any others?
> 
> rahul

There is mascyma 
http://home.arcor.de/mulk/projects/mascyma/download.xhtml.en 
that is a pyhton based interface to maxima. I do not know how it
works, since it does not work for me in the moment.  The window
appears on screen but I get no promt in the moment.

Regards, 
JC



From kent at kentsjohnson.com  Sat Feb 25 23:46:43 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Sat, 25 Feb 2006 23:46:43 -0500
Subject: How to send an email with non-ascii characters in Python
In-Reply-To: <mailman.2444.1140911386.27775.python-list@python.org>
References: <1140775736.341876.314070@t39g2000cwt.googlegroups.com>	<slrndvtn7p.e6o.sybrenUSE@schuimige.unrealtower.org>	<1140777219.636561.47960@e56g2000cwe.googlegroups.com>	<slrndvuma9.f5e.sybrenUSE@schuimige.unrealtower.org>	<1140866239.019528.183190@t39g2000cwt.googlegroups.com>	<slrne00h9l.g7l.sybrenUSE@schuimige.unrealtower.org>
	<mailman.2444.1140911386.27775.python-list@python.org>
Message-ID: <44012e1d$1_2@newspeer2.tds.net>

Gabriel B. wrote:
> what does a string became when it's decoded?
> 
> I mean, it must be encoded in something, right?

Unicode, for encodings like latin-1 or utf-8. A few special cases like 
str.decode('string_escape') yield byte strings again.

Kent


From tim at pollenation.net  Thu Feb  9 10:44:53 2006
From: tim at pollenation.net (Tim Parkin)
Date: Thu, 09 Feb 2006 15:44:53 +0000
Subject: Twisted book opinions?
In-Reply-To: <8ba244fb0602090635k5aa6615emaa8df2ca42a3e81d@mail.gmail.com>
References: <mailman.1638.1139452774.27775.python-list@python.org>	<dsf7qb$2rl$1@scotsman.ed.ac.uk>
	<43EB295B.1020404@pollenation.net>
	<8ba244fb0602090635k5aa6615emaa8df2ca42a3e81d@mail.gmail.com>
Message-ID: <43EB6375.4040908@pollenation.net>

Andrew Gwozdziewycz wrote:
>>What I'd really like now is a 'Web Application Development with
>>Twisted/Nevow' book that takes off where this 'network protocol'
>>oriented book leaves off.
> 
> 
> I thought the O'Reilly book was pretty decent at describing how to
> setup a web application. It's not entirely complete, but I was able to
> piece together an application with a somewhat complex web application
> on top of it. Twisted made it quite easy.

OK perhaps I wasn't as clear as I could have been. It discusses the use
of Twisted with web protocols but doesn't really go into the current,
recommended way to build web applications (because at the time of
writing the possibility of api changes for nevow/twistedweb2 was quite
high?). In fact it does say in the book that "..if you are really
interested in building a web application you should be using nevow.. "
(paraphrased).

Tim Parkin


From s323 at mail.ru  Tue Feb 14 07:10:22 2006
From: s323 at mail.ru (Sergey)
Date: Tue, 14 Feb 2006 15:10:22 +0300
Subject: file names longer than MAX_PATH under Windows 2003
References: <mailman.1897.1139918374.27775.python-list@python.org>
Message-ID: <dsshbg$vl8$1@news.rtcomm.ru>


"Tim Golden" <tim.golden at viacom-outdoor.co.uk> wrote in message news:mailman.1897.1139918374.27775.python-list at python.org...
[Sergey]

>Not to state the obvious, but can you cut-and-paste that long
>string (the one starting with \\?\e:\...) from the Python
>interpreter into the [S]tart [R]un [O]pen field to see what
>comes up? I'm just trying to make sure of the most straightforward
>fact: that the file you've got there definitely does exist!

I cannot do this: when I paste filename there, trail of filename is missing due to length limit in input line.
But I strongly suppose that file exists as its name was get through os.listdir.




From mooquack at suad.org  Wed Feb  1 20:22:32 2006
From: mooquack at suad.org (Kirk McDonald)
Date: Wed, 01 Feb 2006 17:22:32 -0800
Subject: cgi - secure sessions
In-Reply-To: <1138842390.012855.107610@g44g2000cwa.googlegroups.com>
References: <1138842390.012855.107610@g44g2000cwa.googlegroups.com>
Message-ID: <43e15ddc$1@nntp0.pdx.net>

infini.g at gmail.com wrote:
> Hey,
> 
> I was just wondering if / how would it be possible to create secure
> sessions for a website using Python CGI... I thought of using cookies,
> and things looked promising for a while; I could login through a form
> which pointed to a cgi script which created sent the user cookies, but
> I found that when a script to detect the cookies was run through a
> server side include line in the html, it couldn't get any cookies, but
> it would work fine when run directly through the browser (which is
> useless to me).
> 
> If anybody could help with this it would be great. Python is the only
> programming language that I'm relatively comfortable in at the moment,
> so using the usual PHP or Javascript just isn't an option for me
> unfortunately.
> 
> GazaM
> 

For what it's worth, mod_python supports sessions:

http://www.modpython.org/live/current/doc-html/pyapi-sess.html

I've been playing with them recently, and they seem to work. :-)

-Kirk McDonald


From python at rcn.com  Tue Feb  7 10:08:17 2006
From: python at rcn.com (Raymond Hettinger)
Date: 7 Feb 2006 07:08:17 -0800
Subject: Question about idioms for clearing a list
In-Reply-To: <mailman.1546.1139320907.27775.python-list@python.org>
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>
	<mailman.1546.1139320907.27775.python-list@python.org>
Message-ID: <1139324897.738125.278520@g43g2000cwa.googlegroups.com>

> I'm a fairly average programmer (better than average compared to my
> immediate colleagues).  I've read every tutorial I can get my hands
> on, but I have no _memory_  of ever coming across the del keyword, let
> alone that it is fundamental to Python,

My thought is that get/set/del are fundamental ops in almost any
computing context:  songs on your iPod playlist, records in a database,
files in a directory, or elements in a Python list.

Individual element deletion doesn't seem to come-up as much in Python
because we tend to build data collections and then throw them away in
their entirity.  However, the concept becomes more prominent when
dealing with persistence or when mutating a collection in-place.  The
OP was specifically seeking to do in-place modifications and so found
himself in need of understanding the del-statement.  IMHO, it goes with
the territory.



> Similarly, I remember slices simply because they are handy, not
> because I have ever heard of them being fundamental before.

FWIW, I regard slices to be fundamental to the language not because
they are easy or that everyone automatically knows about them; rather,
I am just recognizing that the concept of slices pervades the language
and comes up in many different guises.  It is a lesson that should not
be skipped. That is why I think that the OP's problem is better solved
by improved documentation than by adding an unnecessary method to the
list API.



> As a general rule of thumb, I would say that if a person is struggling
> with a language, it is primarily a problem with the language, and than
> problem with the documentation, and lastly a problem with the person.

I would swap the first two.  No language has yet been invented
(including HTML and LOGO) that someone doesn't struggle with.  In
contrast, no documentation has ever been written that couldn't be
improved.

The "problem with the person" part goes last only because it suggests
immutability.  The reality is that incomplete learning is a fixable
problem (independent of language or doc issues).  If I never learn the
del-statement, should I be surprised that I stuggle with how to express
deletion?



Raymond



From bearophileHUGS at lycos.com  Tue Feb 21 18:42:59 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 21 Feb 2006 15:42:59 -0800
Subject: With pyMinGW
Message-ID: <1140565378.921287.177380@g44g2000cwa.googlegroups.com>

To use Pyrex, SWIG and the like on a Win2K I have followed this way:

http://jove.prohosting.com/iwave/ipython/pyMinGW.html

I already had MinGW 3.4.2, so I have decompressed the Python 2.4.2
sources, I have merged in the pyMinGW patch, and I have run the global
compilation with:

make -f python24.mak all

It has compiled most things, but not zlibmodule.c
It has stopped the compilation with:

c:\......\bin\dllwrap.exe: no export definition file provided.
Creating one, but that may not be what you want
make[1]: Leaving directory `/.../PyminGW/Python-2.4.2/MinGW'
make -f zlib.mak
make[1]: Entering directory `/.../PyminGW/Python-2.4.2/MinGW'
gcc.exe -c ../Modules/zlibmodule.c -o ../Modules/zlibmodule.o
-I"../Include" -I"../Pc" -I"../../../d
ist/zlib-1.2.3"  -Wall -s -DNDEBUG -D_USRDLL -O2
../Modules/zlibmodule.c:8:18: zlib.h: No such file or directory
../Modules/zlibmodule.c:66: error: syntax error before "z_stream"

... etc etc.

Anyway, probably 98% was compiled and this Python works, I have tried
the standard tests and most of them pass.
Then I have downloaded the pyMinGW Extensions V. 0.0.6.6, so zip and
other things now work.

The link to the Tcl-Tkinter extension doesn't work (the free site
hosting the file doesn't accept this file format anymore), so I cannot
use Tkinter.

I have decompressed SWIG and put it in a temporary Path.

I have then tried a basic SWIG example, (called example) coming from
this obsolete but probably still interesting page:
http://sebsauvage.net/python/mingw.html

But I have had problems durign the module creation:

C:\...\PyminGW\Python-2.4.2\MinGW>python setup.py build -cmingw32
running build
running build_ext
building 'example' extension
swigging example.i to example_wrap.c
C:\...\PyminGW\swigwin-1.3.28\swig.exe -python -o example_wrap.c
example.i
creating build
creating build\temp.win32-2.4
creating build\temp.win32-2.4\Release
C:\......\bin\gcc.exe -mno-cygwin -mdll -O -Wall -Ic:\python24\include
-Ic:\pytho
n24\PC -c example_wrap.c -o build\temp.win32-2.4\Release\example_wrap.o
example_wrap.c: In function `My_variable_set':
example_wrap.c:2550: error: `My_variable' undeclared (first use in this
function)

... ecc.


So I have had 3 problems, maybe some of you can suggest me how to solve
some of them.

(Can the standard Python site accept to distribuite an installer with
MinGW-compiled Python + minGW + SWIG for people using Windows that want
such system prebuilt? Maybe me or another person can assemble it).

Thank you,
bearophile



From bonono at gmail.com  Wed Feb 15 00:45:32 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 14 Feb 2006 21:45:32 -0800
Subject: how to write a C-style for loop?
In-Reply-To: <gZednVPdAtumI2_eRVn-jw@rcn.net>
References: <gZednVPdAtumI2_eRVn-jw@rcn.net>
Message-ID: <1139982332.807339.114210@g43g2000cwa.googlegroups.com>


John Salerno wrote:
> for (int i = 0; i < 50; i += 5)
>
> How would that go in Python, in the simplest and most efficient way?

for i in xrange(0,50,5): print i



From eric.nieuwland at xs4all.nl  Mon Feb  6 02:00:03 2006
From: eric.nieuwland at xs4all.nl (Eric Nieuwland)
Date: Mon, 6 Feb 2006 08:00:03 +0100
Subject: translating PHP to Python
In-Reply-To: <1139203979.623011.290430@f14g2000cwb.googlegroups.com>
References: <1139164228.608430.13120@g44g2000cwa.googlegroups.com>
	<1139203979.623011.290430@f14g2000cwb.googlegroups.com>
Message-ID: <09db7486c598d98f5bf6eb5635437e9c@xs4all.nl>

Dave wrote:
> class A(object):
>     def create_child(self):
>         self.child = B()
>         self.child.do_stuff(self)
>
> class B(object):
>     def do_stuff(self, parent):
>         self.parent = parent
>         if self.parent.__class__.__name__ == 'A':
>             print "I'm a child of an A!"
>         else:
>             print "Well, I'm a motherless child. Does that mean I can
> kill Macbeth?"

Depending on your actual needs you could change that to:

class A(object):
     def create_child(self):
         self.child = B(self)

class B(object):
     def __init__(self, parent):
	self.do_stuff(parent)

     def do_stuff(self, parent):
         self.parent = parent
         if self.parent.__class__.__name__ == 'A':
             print "I'm a child of an A!"
         else:
             print "I know ye not!"

which IMHO makes it clearer from A's perspective.

--eric



From ian at excess.org  Tue Feb  7 23:20:45 2006
From: ian at excess.org (Ian Ward)
Date: Tue, 07 Feb 2006 23:20:45 -0500
Subject: Replacing curses (Was: Re: Problem with curses and UTF-8)
In-Reply-To: <43E9234B.6030108@v.loewis.de>
References: <mailman.1566.1139345769.27775.python-list@python.org>
	<43E9234B.6030108@v.loewis.de>
Message-ID: <43E9719D.1060603@excess.org>

Martin v. L?wis wrote:

>Ian Ward wrote:
>  
>
>>Any Ideas?
>>    
>>
>
>I think there is one or more ncurses bugs somewhere.
>
>The ncurses documentation suggests that you should link with
>ncurses_w instead of linking with ncurses - you might try
>that as well. If it helps, please do report back.
>
>Ultimately, somebody will need to debug ncurses to find out
>what precisely happens, and why.
>  
>
Thank you for your response. I see there are other people that have run 
into the same problem.

I've had to work around many curses issues while developing Urwid (a 
console UI library). Even if the bugs are fixed I'm going to have to 
bypass the curses module to support UTF-8 in a reliable way for all users.

I think there are enough escape sequences common to all modern terminals 
so that I can build a generic curses-replacement for my library. 
However, if someone is already working on something similar I don't want 
to reinvent the wheel.

Ian Ward



From fredrik at pythonware.com  Mon Feb 13 08:06:16 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Feb 2006 14:06:16 +0100
Subject: Python equivilant to msgbox()
References: <7CQHf.2690$7C3.1780@trnddc08>
	<43efd40a$1_2@newspeer2.tds.net><1139794076.321041.320480@g43g2000cwa.googlegroups.com>
	<ca55a9900602130502p17c6d20blbe0d7652393defcd@mail.gmail.com>
Message-ID: <dsq088$c8d$1@sea.gmane.org>

Peter Decker wrote:

> > It's also possible to something like that with wxPython.  Try:
> > import wx
> > app = wx.PySimpleApp()
> > dlg = wx.TextEntryDialog(None, 'Enter value', 'Title', '')
> > if dlg.ShowModal() == wx.ID_OK:
> >     val = dlg.GetValue()  # this line should be indented
> > dlg.Destroy()
> > print "you have entered %s" % val
>
> That's the sort of butt-ugly code that got me convinced that Dabo is
> the way to go. To get a simple message box, you have to create it,
> show it, check a return value against an ugly constant (make sure you
> don't forget an use wx.OK instead!), and then remember to destroy it
> or your app will hang.

if you're using a Python version without a "def" statement, it's time to upgrade.

</F> 





From zzhikang at hotmail.com  Wed Feb 22 20:09:18 2006
From: zzhikang at hotmail.com (kanchy kang)
Date: Thu, 23 Feb 2006 01:09:18 +0000
Subject: May i customize basic operator (such as 1==3)?
In-Reply-To: <43fc4174_2@newspeer2.tds.net>
Message-ID: <BAY108-F380AA5CEEE3584EED2B778CDF20@phx.gbl>


Is there any improvement version for standard unittest module?
for example, output log information as files.


>From: Kent Johnson <kent at kentsjohnson.com>
>To: python-list at python.org
>Subject: Re: May i customize basic operator (such as 1==3)?
>Date: Wed, 22 Feb 2006 06:07:35 -0500
>
>Thomas Heller wrote:
>
> > The standard unittest module can do this also:  replace
> > calls to failUnless(a == b) with failUnlessEqual(a, b).
>
>or assertEquals(a, b)
>--
>http://mail.python.org/mailman/listinfo/python-list

_________________________________________________________________
Express yourself instantly with MSN Messenger! Download today - it's FREE! 
http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/



From carsten at uniqsys.com  Mon Feb  6 14:34:08 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 06 Feb 2006 14:34:08 -0500
Subject: Replace a module variable with a function call
In-Reply-To: <1139253593.106535.175310@g47g2000cwa.googlegroups.com>
References: <1139252075.497468.137100@g44g2000cwa.googlegroups.com>
	<mailman.1514.1139252631.27775.python-list@python.org>
	<1139253593.106535.175310@g47g2000cwa.googlegroups.com>
Message-ID: <1139254448.20263.20.camel@dot.uniqsys.com>

On Mon, 2006-02-06 at 14:19, gabriel.becedillas at gmail.com wrote:
> I'm not going to waste my time with more
> examples coz probably you won't understand them either.

Fine, I won't waste my time trying to help you.

-Carsten.




From noway at sorry.com  Sat Feb  4 04:26:57 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Sat, 04 Feb 2006 09:26:57 GMT
Subject: Regular expression query
References: <1138976443.473320.315170@g44g2000cwa.googlegroups.com>
Message-ID: <Br_Ef.76685$eD5.1296510@twister2.libero.it>

Martin Biddiscombe wrote:

> "parameter=12ab"
> "parameter=12ab foo bar"
> "parameter='12ab'"
> "parameter='12ab' biz boz"
> "parameter="12ab""
> "parameter="12ab" junk"

>>> import shlex
>>> def extract(s):
...     s = s.split("=")[1]
...     s = shlex.split(s)[0]
...     return s
...
>>> extract("parameter=12ab")
'12ab'
>>> extract("parameter=12ab foo bar")
'12ab'
>>> extract("parameter='12ab'")
'12ab'
>>> extract("parameter='12ab' biz boz")
'12ab'
>>> extract('parameter="12ab"')
'12ab'
>>> extract('parameter="12ab" junk')
'12ab'

-- 
Giovanni Bajo




From sjuranic at gmail.com  Sun Feb 26 17:23:20 2006
From: sjuranic at gmail.com (Steve Juranich)
Date: Sun, 26 Feb 2006 15:23:20 -0700
Subject: Use of __slots__
References: <dtt8ga$7b2$1@sea.gmane.org>
Message-ID: <dtt9o8$ams$1@sea.gmane.org>

Don Taylor wrote:

> I am puzzled about the following piece of code which attempts to create
> a class that can be used as record or struct with a limited set of
> allowed attributes that can be set into an instance of the class.
> 
> I don't understand why I cannot set an attribute 'age' into record1.

First advice (which also appears in the documentation): stay away from using
__slots__.  It may seem like a good idea at first, but my experience has
taught me that it will cause problems, sooner or later (apparently sooner
for you).

I might be a little confused about a couple of things (I'm sure many will
correct me if I'm not), but as I understand it the __slots__ attribute is a
class-attribute, which means it cannot be modified by an instance of the
class (think of a "static" class member, if you know C++).

IMHO, __slots__ is unpythonic.  Many others have stated so on the list. 
That's why it's great that you're free to ignore that variable.  I suggest
that you do so (as I have chosen to do).  I'm sure that there are
situations where you *MUST* have this kind of capability, but I haven't
bumped into them yet.

-- 
Steve Juranich
Tucson, AZ
USA



From flashkNO at SPAMgmail.com  Sun Feb  5 13:40:43 2006
From: flashkNO at SPAMgmail.com (Farshid Lashkari)
Date: Sun, 05 Feb 2006 10:40:43 -0800
Subject: translating PHP to Python
In-Reply-To: <1139164228.608430.13120@g44g2000cwa.googlegroups.com>
References: <1139164228.608430.13120@g44g2000cwa.googlegroups.com>
Message-ID: <6ErFf.3267$MJ.1302@fed1read07>

> Is there a simple way to get the current object's name? You would think
> __name__ would work, right? It doesn't.

className = item.__class__.__name__

> I'd like to avoid passing a reference to an object's parent in
> __init__, but is there a built in way in Python to say "You, Parent
> Object, do ...stuff!"

Use the super() function to access an attribute of a parent clas

class C(B):
   def meth(self, arg):
     super(C, self).meth(arg)

-Farshid


From jdc at uwo.ca  Mon Feb 20 10:23:32 2006
From: jdc at uwo.ca (Dan Christensen)
Date: Mon, 20 Feb 2006 10:23:32 -0500
Subject: timeit module: am I missing something obvious?
In-Reply-To: <dtbukp$kjq$00$1@news.t-online.com>
References: <43F97593.2010502@REMOVEMEcyber.com.au>
	<dtbukp$kjq$00$1@news.t-online.com>
Message-ID: <87k6bq6oln.fsf@uwo.ca>

Peter Otten <__peter__ at web.de> writes:

> Steven D'Aprano wrote:
>
>> When using the timeit module, you pass the code you
>> want to time as strings:
...
>> This is all very well, but it feels quite unnatural to
>> me. Why am I passing strings around when functions are
>> first class objects? Have I missed something obvious?
>
> You are supposed to time small pieces of code where a function call would be
> a significant overhead.

I think it can be useful to time longer code as well.

Moreover, when you pass in strings, you have to ensure that
the namespace is set-up correctly, which can be awkward at
times.  If you could pass in a function, this would often
be much easier.

> Just do it :-)

Yes, please do!

> I would suggest a slight modification:
>
> t = timeit.Timer.for_function(foo, x, y, a=..., b=...)
>
> And while you are at it you could also move the code that dynamically
> adjusts the number of repetitions from the main() function into a Timer
> method and make its invocation the default for the timeit() method. 

I agree.

Moreover, I think the calibration could be improved a lot.  What I use
is below.  It would be great if something like this could be merged
into timeit.py...

Notice how quickly it locks onto an appropriate number of iterations.
(Only 3% of the time is spent on calibration.)

>>> import timer
>>> timer.timing("3*2/6", goal=0.5, repeat=3, verbose=True)
        1 loops -> 1e-05 secs
    49933 loops -> 0.0396 secs
   630325 loops -> 0.499 secs
   630325 loops -> 0.499 secs 0.5 secs 0.501 secs
   630325 loops, best of 3 trials: 0.792 usec per loop

Dan


"""Uses timeit to benchmark code, quickly choosing number of iterations.

Differences:

- This can be used interactively from python, not just from the
  command line.
- Doesn't use separate creation and timing steps.
- The algorithm for choosing the number of iterations is faster
  and more accurate.  It also allows for just 1 iteration.
- The result from the final pass through the convergence loop
  is used as one of the samples, which saves time
  (especially if repeat=1).

Sample usage:

import timer
timer.timing("sin(10)",setup="from math import sin",repeat=3)
import time
timer.timing("3*2/6",repeat=3,goal=0.5,timer=time.time)

To do:

- add support for passing in a function instead of a string.
"""

import timeit
import time

def timing(stmt="pass",
           setup="pass",
           repeat=1,
           goal=None,
           number=None,
           timer=timeit.default_timer,
           verbose=False,
           precision=3):
    '''Eval setup, and then time stmt.
    goal is desired time in seconds, a float.
    number is desired number of iterations.
    At most one of goal and number can be specified.
    If neither is specified, default to a goal of 1 second.
    When number is not specified, it is determined in an
    efficient way.
    repeat is the total number of times to run the test.
    timer is the timer to use.
    if verbose, show information about calibration.
    precision is the number of significant digits to display.
  '''

    t = timeit.Timer(stmt,setup,timer=timer)
    r = []

    if number != None and goal != None:
        raise ValueError,'Only one of number and goal may be specified.'

    if number == None:
        if goal == None:
            goal = 1.0
        # determine number so that total time >= 90% of goal.
        number = 1
        x = 0.0
        while x < 0.9*goal:
            x = t.timeit(number)

            if verbose:
                print "%9d loops -> %.*g secs" % (number, precision, x)
            if x == 0:
                # 1e2 is chosen because this is a common resolution
                # for time.clock.  Make sure that number gets increased
                # by at least one, to avoid an infinite loop.
                number = max(number+1,int(number*1e2*goal))
            elif x < 0.9*goal:
                # If x is very small, goal/x is large (possibly inf);
                # to be cautious we limit the ratio to 1e6.
                # The +1 is to ensure that number increases by at least 1,
                # since goal/x > 1.
                number = int(number*min(1e6,goal/x)+1)
        r=[x]
        repeat -= 1

    r.extend(t.repeat(repeat, number))

    best = min(r)
    if verbose:
        print "%9d loops ->" % number,
        print " ".join(["%.*g secs" % (precision, x) for x in r])
    print "%9d loops, best of %d trials:" % (number, len(r)),
    usec = best * 1e6 / number
    if usec < 1000:
        print "%.*g usec per loop" % (precision, usec)
    elif usec < 1e6:
        print "%.*g milliseconds per loop" % (precision, usec/1000)
    else:
        print "%.*g seconds per loop" % (precision, usec/1e6)


From mark at holmes.nl  Fri Feb 17 02:00:32 2006
From: mark at holmes.nl (wscrsurfdude)
Date: 16 Feb 2006 23:00:32 -0800
Subject: file.read problem
In-Reply-To: <BieJf.15428$MJ.2728@fed1read07>
References: <1140158220.388409.87650@g47g2000cwa.googlegroups.com>
	<BieJf.15428$MJ.2728@fed1read07>
Message-ID: <1140159632.758960.318580@g44g2000cwa.googlegroups.com>

>Try opening the file in 'rbU' mode. This will use universal newline mode
>and convert all carriage returns to line feeds.

I tried this, but as you say, now there are 0x0A bytes extra in my
files, is there also a possibility to let all these things out, and
just get the file.

I am working on a script to get parts of raw data out of a file, and
the data I read has to be the data written in the file without CR or
LF.



From tzot at sil-tec.gr  Fri Feb 10 05:25:20 2006
From: tzot at sil-tec.gr (Christos Georgiou)
Date: Fri, 10 Feb 2006 12:25:20 +0200
Subject: random playing soundfiles according to rating.
References: <1139456949.087347.173800@o13g2000cwo.googlegroups.com>
	<mailman.1699.1139565587.27775.python-list@python.org>
Message-ID: <ddqou1976j6svkt6po5ell786st72865rl@4ax.com>

On Fri, 10 Feb 2006 09:59:43 +0000, rumours say that Ed Singleton
<singletoned at gmail.com> might have written:

>If speed is no issue (for example you can queue an mp3 while the
>current one is playing), then Ben's solution is the classic one. 
>Store the total of all your scores (or calculate it on the fly if you
>don't have too many files), pick a random number up to that total, and
>then iterate through all your scores, subtracting each score from the
>total, until the total reaches zero, and then play that file.
>
>However that approach gets slower and slower the more files you have
>(slower to calculate the total and slower to iterate through the
>files).

Hm... just playing:

import random, itertools

scored=[('bad',1), ('not that bad',2),('ok',3),('better',4),('best',5)]

def player(lst):
    def forever(lst):
        while 1:
            for item in lst:
                yield item
    total_score= sum(x[1] for x in lst)
    scanner= forever(lst)
    while 1:
        next_score= random.randrange(total_score)
        for item in scanner:
            if next_score <= item[1]:
                yield item[0]
                next_score+= random.randrange(total_score)
            else:
                next_score-= item[1]


print list(itertools.islice(player(scored), 0, 20))

['better', 'ok', 'best', 'not that bad', 'best', 'best', 'best', 'not that
bad', 'ok', 'best', 'best', 'bad', 'better', 'better', 'better', 'ok', 'ok',
'not that bad', 'best', 'best']
-- 
TZOTZIOY, I speak England very best.
"Dear Paul,
please stop spamming us."
The Corinthians


From norvell at stenocall.com  Wed Feb 22 15:23:45 2006
From: norvell at stenocall.com (Norvell Spearman)
Date: Wed, 22 Feb 2006 14:23:45 -0600
Subject: list assignment
Message-ID: <11vpi2gdcbccbf6@corp.supernews.com>

In "Learning Python," by Lutz and Ascher, there's a table showing different 
assignment statement forms.  One form shown is list assignment.  The authors 
give this as an example:

     [spam, ham] = ['yum', 'YUM']

I don't see how this is any different than a tuple unpacking assignment:

     >>> a, b = 1, 2
     >>> a, b
     (1, 2)
     >>> [a, b] = [1, 2]
     >>> a, b
     (1, 2)

In both instances the names a and b are both mapped to 1 and 2 so why are there 
two different forms?

Thanks for any answers.

--
Norvell Spearman


From http  Mon Feb 27 19:09:21 2006
From: http (Paul Rubin)
Date: 27 Feb 2006 16:09:21 -0800
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>
	<4402AB7F.7070804@REMOVEMEcyber.com.au>
	<7xzmkdxkce.fsf@ruckus.brouhaha.com>
	<1141081843.064202.10560@i40g2000cwc.googlegroups.com>
Message-ID: <7xhd6kjqdq.fsf@ruckus.brouhaha.com>

"I V" <wrongbad at gmail.com> writes:
> I think it does, doesn't it? From the PEP:
> 
> "Values within an enumeration cannot be meaningfully compared *except
> with values from the same enumeration*.  The comparison operation
> functions return ``NotImplemented`` [#CMP-NOTIMPLEMENTED]_ when a
> value from an enumeration is compared against any value not from the
> same enumeration or of a different type." (my emphasis)

Oh ok, thanks.  I didn't understand this before.  The link from the
footnote explains it.


From mlist at fastwebnet.it  Tue Feb  7 19:36:18 2006
From: mlist at fastwebnet.it (billie)
Date: Wed, 8 Feb 2006 01:36:18 +0100
Subject: Using RAW_SOCKETS on win XP SP2
References: <sg1Gf.72644$av6.48103@tornado.fastwebnet.it>
Message-ID: <%1bGf.580$mL5.26@tornado.fastwebnet.it>

"Up" :-) 




From kmkz89 at gmail.com  Thu Feb  9 17:07:30 2006
From: kmkz89 at gmail.com (kmkz89 at gmail.com)
Date: 9 Feb 2006 14:07:30 -0800
Subject: pythonic exec* spawn*
In-Reply-To: <mailman.1686.1139521339.27775.python-list@python.org>
References: <mailman.1686.1139521339.27775.python-list@python.org>
Message-ID: <1139522850.559814.25190@g43g2000cwa.googlegroups.com>

You could possibly pickle an object and send it, but that could be a
bit messy...



From ark at acm.org  Thu Feb 16 14:50:40 2006
From: ark at acm.org (Andrew Koenig)
Date: Thu, 16 Feb 2006 19:50:40 GMT
Subject: Job advert: Your help needed
References: <mailman.1996.1140081219.27775.python-list@python.org>
Message-ID: <kI4Jf.409265$qk4.57605@bgtnsc05-news.ops.worldnet.att.net>

"Paul Boots" <bootsch at acm.org> wrote in message 
news:mailman.1996.1140081219.27775.python-list at python.org...

> Paul Boots
> bootsch at acm.org
> +354 664 1748

Iceland?  really??




From riteshsarraf at gmail.com  Fri Feb 10 09:01:44 2006
From: riteshsarraf at gmail.com (Ritesh Raj Sarraf)
Date: 10 Feb 2006 06:01:44 -0800
Subject: breaking from loop
In-Reply-To: <dshk7o$i92$02$1@news.t-online.com>
References: <1139557074.938577.281250@f14g2000cwb.googlegroups.com>
	<dshk7o$i92$02$1@news.t-online.com>
Message-ID: <1139579096.471160.292300@g14g2000cwa.googlegroups.com>

Thanks to everyone. It is really the best place and the best people to
learn from.
Here's what I followed from the discussion:

def files(root):
    for path, folders, files in os.walk(root):
        for file in files:
            yield path, file


def copy_first_match(repository, filename, dest_dir): # aka
walk_tree_copy()
    for path, file in files(repository):
        if file == filename:
            try:
                shutil.copy(os.path.join(path, file), dest_dir)
                sys.stdout.write("%s copied from local cache %s." %
(file, repository))
            except shutil.Error:
                sys.stdout.write("%s is available in %s. Skipping
Copy!" % (file, dest_dir))
            return True
    return False

All I've added is the exception check because in case "file" is
available in "dest_dir", I want to display a message.
Since I'm still new and learning will be great if you let me know if
this is the proper way or not.

Thanks to everyone once again. It's been a very good experience
understanding everyone's comments.

Regards,
rrs



From python-list.overbored at spamgourmet.com  Tue Feb 14 01:00:36 2006
From: python-list.overbored at spamgourmet.com (python-list.overbored at spamgourmet.com)
Date: Tue, 14 Feb 2006 01:00:36 -0500
Subject: Logging hangs thread after detaching a StreamHandler's terminal
Message-ID: <8e53a5920602132200t1e0d3e47ge03305e76a95a356@mail.gmail.com>

Hi all,

After many hours, I think I've found a bug in the logging module!

If you add a (stdout) StreamHandler to a logger, then detach the
terminal for that stdout, subsequent calls to log() will hang the
calling thread.

To reproduce this, write the following scripts (this was a small test
case I came up with - maybe there's something simpler):

$ cat tryhup.bash
#!/usr/bin/env bash
scp hup.* localhost:
ssh localhost './hup.bash ; while true ; do sleep 1 ; done'

$ cat hup.bash
#!/usr/bin/env bash
./hup.py &

$ cat hup.py
#!/usr/bin/env python
import time
import logging
f = file( '/tmp/hup.out', 'w' )
try:
        logging.basicConfig( filename = '/tmp/lup.out', filemode = 'w' )
        # XXX PROBLEM LINE BELOW
        logging.getLogger('').addHandler( logging.StreamHandler() )
        while True:
                f.write( '-------\n' )
                f.flush()
                logging.critical( '======' )
                time.sleep(1)
finally:
        f.close()

Run ./tryhup.bash. It will sit in an idle spin. Monitor the files
/tmp/hup.out and /tmp/lup.out. Hit Ctrl-C on tryhup to kill it. The
python process is still running, but is stalled (the .out files are no
longer changing).

If you remove the above labeled line, however, this doesn't happen.

Can anybody please acknowledge this bug? Any temporary workarounds to
this problem? Thanks in advance for looking into this and for hearing
me in!



From bblais at bryant.edu  Mon Feb  6 06:19:21 2006
From: bblais at bryant.edu (Brian Blais)
Date: Mon, 06 Feb 2006 06:19:21 -0500
Subject: numeric expression from string?
In-Reply-To: <pan.2006.02.04.14.51.46.770998@REMOVETHIScyber.com.au>
References: <mailman.1413.1139061291.27775.python-list@python.org>
	<pan.2006.02.04.14.51.46.770998@REMOVETHIScyber.com.au>
Message-ID: <43E730B9.7090408@bryant.edu>

Steven D'Aprano wrote:
> 
> It is good to be cautious. Big thumbs up. But what exactly are you worried
> about? Do you think your users might enter something Evil and break their
> own system? I'd suggest that's not your problem, and besides, it is hard
> to think of anything they could do with eval that they couldn't do by
> exiting your app and running something Evil in their shell prompt.

yeah, I guess when you think about it, there really isn't a problem.  I figured that
someone might accidentally do damage to their system with an unchecked eval.

> 
> Are you running this script as a cgi script? Then remote users might use
> eval to break your system, and you are right to avoid it.

no I am not, but it is good to know how to deal with it in this case too.


		thanks!


			bb

-- 
-----------------

             bblais at bryant.edu
             http://web.bryant.edu/~bblais




From pprobert at wisc.edu  Fri Feb 24 09:44:49 2006
From: pprobert at wisc.edu (Paul Probert)
Date: Fri, 24 Feb 2006 08:44:49 -0600
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <hb7tv11kmpnd5m4qhhqg1mdq5n61uc7odq@4ax.com>
References: <mailman.2369.1140730029.27775.python-list@python.org>	<dtla7j$pqs$1@newsreader3.netcologne.de>	<mailman.2373.1140731808.27775.python-list@python.org>
	<hb7tv11kmpnd5m4qhhqg1mdq5n61uc7odq@4ax.com>
Message-ID: <dtn5uo$4ee$1@sea.gmane.org>

Dennis Lee Bieber wrote:

>On Thu, 23 Feb 2006 15:56:09 -0600, Paul Probert <pprobert at wisc.edu>
>declaimed the following in comp.lang.python:
>
>
>  
>
>>  Thanks for the reply. I should have mentioned, this happens to just 
>>about every machine in our collection of about 20 machines. Each is of a 
>>different age, and the hardware is completely diverse. Each has either 
>>of NT4, win2k, or XP installed. They all belong to our domain
>>
>>    
>>
>	Any chance they all tend to have slow clocks, and are getting bitten
>by a semi-random NTP time update; my machine tends to run the NTP update
>at 7-day intervals (including time of day), counting from the last
>successful synchronization.
>  
>
This is now our leading suspect. All the affected machines have 
"abouttime.exe" running as a service, something our sysadmin put in a 
few years ago. We are currently disabling this and now waiting for the 
proof.
Thanks!

Paul Probert
University of Wisconsin



From tjreedy at udel.edu  Sun Feb 19 17:57:31 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 19 Feb 2006 17:57:31 -0500
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com><Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com><43f8ba1e$0$2895$626a54ce@news.free.fr><yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
Message-ID: <dtat4r$atb$1@sea.gmane.org>

>> Of course it is. What do you think happens to the bytecode?

> Ok, then what do you think happens to 'machine' code ?

I believe that on modern CISC processors the human level 'machine code' is 
interpreted by subroutines written in the actual machine code usually 
called 'microcode'.

tjr







From bonono at gmail.com  Mon Feb 20 07:32:56 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 20 Feb 2006 04:32:56 -0800
Subject: Quesion about the proper use of __slots__
In-Reply-To: <dtca02$pn3$03$2@news.t-online.com>
References: <1140424508.393412.79140@o13g2000cwo.googlegroups.com>
	<43f9825e$0$4777$636a55ce@news.free.fr>
	<1140426860.033363.237150@o13g2000cwo.googlegroups.com>
	<dtc219$h0a$01$1@news.t-online.com>
	<1140428016.170547.315710@g47g2000cwa.googlegroups.com>
	<1140432487.272405.297100@f14g2000cwb.googlegroups.com>
	<1140434225.164304.230440@z14g2000cwz.googlegroups.com>
	<dtca02$pn3$03$2@news.t-online.com>
Message-ID: <1140438776.231178.205500@g43g2000cwa.googlegroups.com>


Peter Otten wrote:
> > He could be working on a machine with < 1M RAM or some other
> > constraints.
>
> I have 256K, by the way.
>
Impressive, curious to know what kind of environment it is as it has
been a long time I have seen such limited spec. My first x86(IBM PC)
had more than that.



From medium654 at gmail.com  Sun Feb 19 20:47:48 2006
From: medium654 at gmail.com (funktion)
Date: 19 Feb 2006 17:47:48 -0800
Subject: editor for Python on Linux
In-Reply-To: <ee741$43f8f002$4059f547$6756@pioneerwireless.net>
References: <dtai6e$23m$2@ariane.blic.net>
	<ee741$43f8f002$4059f547$6756@pioneerwireless.net>
Message-ID: <1140400068.355541.291270@g43g2000cwa.googlegroups.com>

gedit



From steve at REMOVEMEcyber.com.au  Thu Feb 23 01:45:11 2006
From: steve at REMOVEMEcyber.com.au (Steven D'Aprano)
Date: Thu, 23 Feb 2006 17:45:11 +1100
Subject: except clause not catching IndexError
References: <dti4d8$lmn$1@mailhub227.itcs.purdue.edu>
	<8764n7dzl5.fsf@andreasen.org>
Message-ID: <43FD59F7.5070302@REMOVEMEcyber.com.au>

Erwin S. Andreasen wrote:

> Did you by any chance do something like:
> 
> except ValueError, IndexError:
> 
> at some point earlier in this function? That, when catching ValueError
> assigns the resulting exception to IndexError (and so the following
> except IndexError: wouldn't work as IndexError is no longer what you
> think it is). The correct syntax for catching multiple exceptions is:
> 
> except (ValueError, IndexError), targetVariable:


You mean to say that "except X,Y:" gives different 
results to "except (X,Y):"?

That can't be good.

 >>> try:
...     L = []; print L[2]
... except ValueError, IndexError:
...     print "Error!"
...
Traceback (most recent call last):
   File "<stdin>", line 3, in ?
IndexError: list index out of range

 >>> try:
...     L = []; print L[2]
... except (ValueError, IndexError):
...     print "Error!"
...
Error!


And here I was thinking that commas make tuples, not 
brackets. What is happening here?


-- 
Steven.



From martin at v.loewis.de  Wed Feb  8 16:25:12 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 08 Feb 2006 22:25:12 +0100
Subject: sys.path and unicode folder names
In-Reply-To: <43ea541e@news.bezeqint.net>
References: <43e8c2ae$1@news.bezeqint.net>
	<43e8f3eb$0$7988$9b622d9e@news.freenet.de>
	<43e99e5e@news.bezeqint.net> <43EA3F20.2020402@v.loewis.de>
	<43ea541e@news.bezeqint.net>
Message-ID: <43EA61B8.9040905@v.loewis.de>

Nir Aides wrote:
> Actually, I already managed to make a Patch for this problem.
> I will post it soon on my website and in this group.
> 
> But I find it strange that this problem even exists, and that I could
> not find any workarounds on the Internet.

Very few people use file names not in their respective CP_ACP (why
do you need such filenames?), and virtually nobody wants to put such
a file name on Python's sys.path (why do you want to? - just rename
the directory and be done).

Regards,
Martin


From paul at boddie.org.uk  Mon Feb 13 17:39:53 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 13 Feb 2006 14:39:53 -0800
Subject: Pythonic gui format?
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<dsqocq$dcq$1@bagan.srce.hr>
	<1139862779.383505.20890@g44g2000cwa.googlegroups.com>
Message-ID: <1139870393.794624.181380@z14g2000cwz.googlegroups.com>

Gregory Petrosyan wrote:
> Thanks for your reply.
> But isn't python code more flexible than XML? I think it's not harder
> to edit py file than xml file.

It's all about integration with tools, and while there are various
situations where avoiding tools is often better than extensive use of
tools (Python vs. Java-plus-Eclipse being an example that springs to my
mind, at least), there are some very good tools for certain kinds of
GUI design; it's better in such situations to make use of those tools
rather than eschew them in favour of something "Pythonic" but, in
various respects, less usable.

Once upon a time, it may have been the case that GUI design tools
(typically for forms-based applications) only produced program code - I
think SpecTcl, for example, was admired for its capabilities but
criticised for its Tcl-centric nature, ultimately forcing many to look
elsewhere despite variants such as SpecPython - but most design tools
now seem to produce some kind of XML description of widgets and
dialogues. How usable to other languages would Glade or Qt Designer be
if they respectively produced just C and C++ code? (Actually, unlike
Tcl, consuming C or C++ produced from the same tools would be an
annoyance in itself, I'd imagine.)

Paul



From bonono at gmail.com  Thu Feb 16 23:52:40 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 16 Feb 2006 20:52:40 -0800
Subject: getting the line just before or after a pattern searched
In-Reply-To: <1140146668.313276.91380@g43g2000cwa.googlegroups.com>
References: <1140146668.313276.91380@g43g2000cwa.googlegroups.com>
Message-ID: <1140151960.025486.87790@g44g2000cwa.googlegroups.com>


s99999999s2003 at yahoo.com wrote:
> hi
>
> i have a file something like this
>
> abcdefgh
> ijklmnopq
> 12345678
> rstuvwxyz
> .....
> .....
> .....
> 12345678
> .....
>
> whenever i search the file and reach 12345678, how do i get the line
> just above and below ( or more than 1 line above/below) the pattern
> 12345678 and save to variables? thanks

I would try something similar to the pairwise recipe here :

http://www.python.org/doc/2.4.2/lib/itertools-recipes.html



From tdelaney at avaya.com  Tue Feb  7 22:54:16 2006
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Wed, 8 Feb 2006 14:54:16 +1100
Subject: module with __call__ defined is not callable?
Message-ID: <2773CAC687FD5F4689F526998C7E4E5F07433F@au3010avexu1.global.avaya.com>

limodou wrote:

> On 2/8/06, adam johnson <adam.sven.johnson at gmail.com> wrote:
>> Thanks for you answer.
>> 
>> I was under the impression that you could tack methods onto an
>> object at any time, your example almost works with old style classes
>> and would with a function instead of a method. 

In fact it will work if you change the A.hello to self.hello ...

    class A:

        def __init__(self):
            self.__call__ = self.hello

        def hello (self):
            print 'Hello, world!'

    a = A()
    a()

    Hello, world!

>> So now all I need to know is why now with new style classes the
>> special functions need to be defined on the class instead of
>> attached to the instance at any time. 

http://users.rcn.com/python/download/Descriptor.htm

> don't need do like above!
> 
>  >>> class A:
>  ...     def __init__(self):
>  ...             A.__call__ = A.hello
>  ...     def hello(self):
>  ...             print "Hello, world!"
> 
>  >>> a = A()
>  >>> a()
>  Hello, world!
> 
> You should review the bound method and unbound method.

This has nothing to do with it - in the above example, you are setting
the *class* attribute of a user-defined class (which allows setting
additional attributes) - which therefore makes instances callable.

Compare the equivalent for the current module:

    import sys

    def hello (self):
        print 'Hello, world!'

    m = sys.modules[__name__]
    mc = type(m)
    mc.__call__ = hello

    Traceback (most recent call last):
      File "D:\Python\modules\testclasscall.py", line 7, in ?
        mc.__call__ = hello
    TypeError: can't set attributes of built-in/extension type 'module'

Tim Delaney


From xavier.morel at masklinn.net  Tue Feb  7 16:37:04 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Tue, 07 Feb 2006 22:37:04 +0100
Subject: Is Python good for web crawlers?
In-Reply-To: <7x1wyekj0n.fsf@ruckus.brouhaha.com>
References: <1139330008.270988.227170@g44g2000cwa.googlegroups.com>
	<7x1wyekj0n.fsf@ruckus.brouhaha.com>
Message-ID: <dsb3mg$d99$1@apollon.grec.isp.9tel.net>

Paul Rubin wrote:
> Generally I use urllib.read() to get
> the whole html page as a string, then process it from there.  I just
> look for the substrings I'm interested in, making no attempt to
> actually parse the html into a DOM or anything like that.
 >
BeautifulSoup works *really* well when you want to parse the source 
(e.g. when you don't want to use string matching, or when the structures 
you're looking for are a bit too complicated for simple string 
matching/substring search)

The API of the package is extremely simple, straightforward and... obvious.


From onurb at xiludom.gro  Tue Feb 14 05:19:11 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Tue, 14 Feb 2006 11:19:11 +0100
Subject: Python / Apache / MySQL
In-Reply-To: <0001HW.C01764D700060858F0407550@news.individual.de>
References: <1139907519.427789.188760@g14g2000cwa.googlegroups.com>
	<slrndv38ti.7rh.sybrenUSE@schuimige.unrealtower.org>
	<0001HW.C01764D700060858F0407550@news.individual.de>
Message-ID: <43f1aebb$0$1728$636a55ce@news.free.fr>

Kalle Anke wrote:
> On Tue, 14 Feb 2006 10:32:34 +0100, Sybren Stuvel wrote
> (in article <slrndv38ti.7rh.sybrenUSE at schuimige.unrealtower.org>):
> 
> 
>>I second Bruno: swap MySQL in favour of PostgreSQL.
> 
> 
> And the reason is ?? (apart from PostgreSQL being larger and more complete, 
> what are the differences for "simple" usage?)

The reason is mostly that either you need a real, full-blown, rock-solid
 RDBMS - which MySQL is definitively not - or you dont - in which case
SQLite is probably a much more lightweight and agile solution.

My 2 cents
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From chris.atlee at gmail.com  Thu Feb 16 12:07:03 2006
From: chris.atlee at gmail.com (chris.atlee at gmail.com)
Date: 16 Feb 2006 09:07:03 -0800
Subject: Copying zlib compression objects
References: <1139955568.754530.164990@g44g2000cwa.googlegroups.com>
Message-ID: <1140109623.130804.133540@o13g2000cwo.googlegroups.com>

No comments?

I found a small bug in TarFile.snapshot() / restore() - they need to
save and restore self.inodes as well.



From ruby at no.spam  Sun Feb 26 20:08:24 2006
From: ruby at no.spam (Michal Kwiatkowski)
Date: Mon, 27 Feb 2006 02:08:24 +0100
Subject: Local variables initialization
In-Reply-To: <1hbdjrw.1lrbcv8k3kcbsN%aleaxit@yahoo.com>
References: <dttf62$qng$1@news.onet.pl>
	<1hbdjrw.1lrbcv8k3kcbsN%aleaxit@yahoo.com>
Message-ID: <dttjb7$ba8$1@news.onet.pl>

Alex Martelli wrote:
> Michal Kwiatkowski <ruby at no.spam> wrote:
>    ...
>> def method(self):
>>     var_one = self.attr_one
>>     var_two = self.attr_two.another_attr
>>     empty_list = []
>>     # significant code goes here
>    ...

> Personally, I would keep pushing back against this approach even after
> I'd gone to the trouble of implementing it more solidly -- in no way is
> clarity served by having magic local variables appear out of the blue
> (or, rather, the black of black magic).  However, whether something CAN
> be done, and whether it SHOULD be done, are separate issues.

I agree with your approach to local variables appearing out of nowhere,
but still, it's a real pain to copy-and-paste few lines of this standard
initialization to each new method I add. And then imagine another local
variable will be needed and I have to change every single method...
That's even more bug prone than magic-variables approach, if you ask me.
The problem wouldn't be such a problem if Python had implicit self...
but on the other side, it's another ambiguity.

Well, maybe you can help me in refactoring this code, so that it won't
be such a pain to easily modify groups of methods? I'm thinking about this:

def init_arguments(fun):
    def new_f(self):
        var_one = self.attr_one
        var_two = self.attr_two.another_attr
        empty_list = []

        fun(self, var_one, var_two, empty_list)

    return new_f

@init_arguments
def method(self, var_one, var_two, empty_list):
    # significant code goes here
    # ...

But the bad thing about this approach is that actual method doesn't
really look like its definition, because of different number of arguments.

mk
-- 
 . o .       >>  http://joker.linuxstuff.pl  <<
 . . o   It's easier to get forgiveness for being wrong
 o o o   than forgiveness for being right.


From modelnine at bit-bukket.org  Wed Feb  8 14:00:56 2006
From: modelnine at bit-bukket.org (Heiko Wundram)
Date: Wed, 08 Feb 2006 20:00:56 +0100
Subject: email questions
References: <FDD3FDB3-EF9C-4F85-9599-37AF617DED18@pacbell.net>
	<1139420846.28143.41.camel@dot.uniqsys.com>
	<mailman.1614.1139424578.27775.python-list@python.org>
Message-ID: <dsdevt$et5$1@online.de>

Scott Frankel wrote:

> 
> Seems I'm still having issues with syntax.
> 
>  From what I can tell from my mail client, my outgoing mail server
> name is either
> 
> mail.<ispname>.net
> or
> mail.<ispname>.net:<myUsername>@<myDomain>.com
> 
> The former yields the same socket error on connect() that I reported
> earlier.  The latter yields a "nonnumeric port" error upon
> instantiation.  Instantiating with the port number,

The latter isn't a hostname, it's a hostname (mail.<ispname>.net) padded
with user information for SMTP-Auth, which shouldn't be written in this
format anyway.

Probably your Provider only supports SMTPs or the like (which doesn't use
the default port 25, check for that. Otherwise: if connections are still
refused, does your provider really want you to use this mailserver? Or are
they providing some other relay? I know most ISPs I know and work with use
smtp.<ispname> for their outgoing client-relay.

--- Heiko.


From fredrik at pythonware.com  Sun Feb  5 03:49:21 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 5 Feb 2006 09:49:21 +0100
Subject: Generators vs. Functions?
References: <0001HW.C00ABC2B000323A6F0335550@news.individual.de><43E50E73.40504@kzoo.edu><mailman.1426.1139097119.27775.python-list@python.org><gkeFf.434944$2k.218378@pd7tw1no>
	<pan.2006.02.05.08.14.28.103057@REMOVETHIScyber.com.au>
Message-ID: <ds4e6j$jlt$1@sea.gmane.org>

Steven D'Aprano wrote:

> So on the basis of my tests, there is a small, but significant speed
> advantage to _calling_ a function versus _resuming_ a generator.

now add state handling to your micro-benchmark, and see if the function
example still runs faster.

(hint: functions and generators do different things, and are designed
for different use cases.  they're not two different ways to do the same
thing, and benchmarks that ignore that simple fact are pretty much use-
less, except, perhaps, for a very small group of VM developers.)

</F>





From onurb at xiludom.gro  Wed Feb  8 12:51:33 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Wed, 08 Feb 2006 18:51:33 +0100
Subject: 450 Pound Library Program
In-Reply-To: <dsd4to$umq$1@wake.carmen.se>
References: <1139351498.090768.82270@o13g2000cwo.googlegroups.com>
	<43e9f1e1$0$612$636a15ce@news.free.fr>
	<1139411880.032250.181300@g43g2000cwa.googlegroups.com>
	<dsd4to$umq$1@wake.carmen.se>
Message-ID: <43ea2fbf$0$31862$626a54ce@news.free.fr>

Magnus Lycka wrote:
> plahey at alumni.caltech.edu wrote:
> 
>> Ok,
>>
>> I give up. DRY = Don't Repeat Yourself (google Pragmatic Programmers)
>> but SPOT?  Google is little help here, SPOT is too common a word.
> 
> 
> The only SPOT I worked with (as I know of) was SPOT4
> (Le Systeme Pour 'l Observation de la Terre) but that's
> probably not it...

Probably not !-)

> Single Point Of Truth? 

And the winner is... <your-name-here />

> It seems some claim that DRY and
> SPOT are the same things.
> http://www.artima.com/cppsource/reducepnp3.html

Well, they are at least very closely related !-)

And I of course forgot OnceAndOnlyOnce...

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From n.estner at gmx.de  Thu Feb  2 19:56:06 2006
From: n.estner at gmx.de (n.estner at gmx.de)
Date: 2 Feb 2006 16:56:06 -0800
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<iUwEf.24484$1%5.21795@tornado.texas.rr.com>
Message-ID: <1138928166.272387.51110@g44g2000cwa.googlegroups.com>

Definitely looks interesting. I'd like it more if it was more explicit,
but still, it does look nice.

I guess you could make it recursion-safe if you saved/restored the
global "__" variable before/after calling the actual function, and
probably there's a way to make it thread-safe, too. But how would you
make it generator-safe? Also, wouldn't lambda's you pass around from
object to object be bound to use the wrong instance? How would you fix
this code:

class TestA:
    @memberFunction
    def do(f):
        print f()


class TestB:
    @memberFunction
    def do(x):
        x.do(lambda : __)

TestB().do(TestA()) # should print out TestB, does print out TestA


There really should be something like a wiki for
"selfishness"-proposals with pros and cons, so I could have looked at
some before thinking about my own one...



From fakeaddress at nowhere.org  Tue Feb 21 00:58:29 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Tue, 21 Feb 2006 05:58:29 GMT
Subject: Databases and python
In-Reply-To: <pan.2006.02.14.08.06.18.754312@dcs.nac.uci.edu>
References: <pan.2006.02.14.08.06.18.754312@dcs.nac.uci.edu>
Message-ID: <9_xKf.10897$rL5.6130@newssvr27.news.prodigy.net>

Dan Stromberg wrote:
> I've been putting a little bit of time into a file indexing engine
[...]

To solve the O.P.'s first problem, the facility we need is an
efficient externally-stored multimap. A multimap is like a map,
except that each key is associated with a collection of values,
not just a single value. Obviously we could simply encode
multiple values into a single string -- and that's what the
O.P. did -- but updating large strings is inefficient.

Fortunately, the standard Python distribution now includes an
efficient multimap facility, though the standard library doc
does not yet say so. The bsddb module is, in the current
version, built on bsddb3, which exposes far more features of
the Berkeley DB library than the bsddb module.

     http://pybsddb.sourceforge.net/bsddb3.html


Sleepycat Software's Berkeley DB library: supports an option
of mapping keys to multiple values:

     http://sleepycat.com/docs/ref/am_conf/dup.html


Below is a simple example.
--Bryan



import bsddb

def add_words_from_file(index, fname, word_iterator):
     """ Pass the open-for-write bsddb B-Tree, a filename, and a list
         (or any interable) of the words in the file.
     """
     s = set()
     for word in word_iterator:
         if word not in s:
             s.add(word)
             index.put(word, fname)
     index.sync()
     print

def lookup(index, word):
     """ Pass the index (as built with add_words_from_file) and a
         word to look up. Returns list of files containing the word.
     """
     l = []
     cursor = index.cursor()
     item = cursor.set(word)
     while item != None:
         l.append(item[1])
         item = cursor.next_dup()
     cursor.close()
     return l


def test():
     env = bsddb.db.DBEnv()
     env.open('.', bsddb.db.DB_CREATE | bsddb.db.DB_INIT_MPOOL)
     db = bsddb.db.DB(env)
     db.set_flags(bsddb.db.DB_DUP)
     db.open(
             'junktest.bdb',
             None,
             bsddb.db.DB_HASH,
             bsddb.db.DB_CREATE | bsddb.db.DB_TRUNCATE)

     data =[
         ('bryfile.txt', 'nor heed the rumble of a distant drum'),
         ('junkfile.txt', 'this is the beast, the beast so sly'),
         ('word file.txt', 'is this the way it always is here in Baltimore')
     ]
     for (fname, text) in data:
         words = text.split()
         add_words_from_file(db, fname, words)

     for word in ['is', 'the', 'heed', 'this', 'way']:
         print '"%s" is in files: %s' % (word, lookup(db, word))


test()


From aahz at pythoncraft.com  Sat Feb 25 01:30:28 2006
From: aahz at pythoncraft.com (Aahz)
Date: 24 Feb 2006 22:30:28 -0800
Subject: python-list/python-dev quoting style
References: <dtml9t$367$1@gemini.csx.cam.ac.uk> <dtnjdt$n9q$1@panix2.panix.com>
	<dto7um$ils$1@gemini.csx.cam.ac.uk>
Message-ID: <dtoti4$nmj$1@panix3.panix.com>

In article <dto7um$ils$1 at gemini.csx.cam.ac.uk>,
Michael Hoffman  <cam.ac.uk at mh391.invalid> wrote:
>[me]
>>>Does anyone have a script to convert more conventional USENET quoting 
>>>style... to the commonly used python-dev/python-list style...
>
>[Aahz]
>> Blech.  Stick with the standard Usenet quoting style for both!
>
>I think this style is *much* clearer and cleaner. It does require a
>lot more hand editing though, although this encourages more judicious
>quoting.

It requires enough effort that I either skip it or don't respond.  Keep
that in mind if you want people to respond to your posts.  I also notice
many people trimming too much context.  And who is "me", anyway?
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"19. A language that doesn't affect the way you think about programming,
is not worth knowing."  --Alan Perlis


From tim.golden at viacom-outdoor.co.uk  Tue Feb 14 03:33:57 2006
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 14 Feb 2006 08:33:57 -0000
Subject: How to get DVD Drive Name?
Message-ID: <9A28C052FF32734DACB0A288A3533991044D2551@vogbs009.gb.vo.local>

[Robot]

> How to get the DVD Drive name with Python?

Since you're not giving many clues with that
question, I'm going to guess that you're on
Windows and that you want to know which of
your drives is the DVD? Or, possibly, what
the physical DVD description is.

Assuming that's the case, you should be able
to do something with WMI. I don't have a DVD
on this machine, but I suggest you look at 
the Win32_CDROMDrive class, and probably at 
the Id or Drive fields.

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________


From bronger at physik.rwth-aachen.de  Sun Feb 19 08:35:16 2006
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Sun, 19 Feb 2006 14:35:16 +0100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<1140338593.555029.63860@g43g2000cwa.googlegroups.com>
	<roy-F93C16.08223719022006@reader2.panix.com>
Message-ID: <8764nb4gkr.fsf@wilson.homeunix.com>

Hall?chen!

Roy Smith <roy at panix.com> writes:

> [...]
>
> It's been a while since I've dabbled in lisp, but my recollection
> is that the plethora of different implementations has also meant
> that portability is a fantasy.
>
> I dread the day that competing Python implementations spring up.

Even worse: In one of them Microsoft is involved.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus            ICQ 264-296-646


From duncanm255 at hotmail.com  Mon Feb 27 10:44:25 2006
From: duncanm255 at hotmail.com (D)
Date: 27 Feb 2006 07:44:25 -0800
Subject: Waiting for Connection
Message-ID: <1141055065.100567.199430@p10g2000cwp.googlegroups.com>

I am trying to do the following using Python and Tkinter:

1)  Display a window with 1 button
2)  When user clicks the button, Python attempts to call a function
that opens a socket and listens for a connection - what I want to do
is, if the socket has been successfully opened and the system is
waiting for a connection, to turn the button green.

The problem I'm having is when the button is clicked, the color never
changes and the application "locks up" until the remote end connects
and disconnects.  Where can I put the button configuration statement so
that it will turn green to indicate the socket was opened successfully?
 Thanks!



From blair.houghton at gmail.com  Tue Feb  7 00:22:29 2006
From: blair.houghton at gmail.com (Blair P. Houghton)
Date: 6 Feb 2006 21:22:29 -0800
Subject: numeric expression from string?
In-Reply-To: <pan.2006.02.04.14.51.46.770998@REMOVETHIScyber.com.au>
References: <mailman.1413.1139061291.27775.python-list@python.org>
	<pan.2006.02.04.14.51.46.770998@REMOVETHIScyber.com.au>
Message-ID: <1139289749.634919.251840@g14g2000cwa.googlegroups.com>

Steven wrote:
>Do you think your users might enter something Evil and break their own system?

That's not usually how it works.

How it usually works is:

1.  Innocent code-monkey writes nifty applet, posts on usenet.
2.  Innocent but dull-witted framework manufacturer includes nifty
applet in Next Big Thing framework.
2.  Innocent webmaster uses framework to design entire website,
dragging and dropping input boxes validated by nifty applet all over
the place.
3.  Budding malevolent self-deceived "just fooling around" script
kiddie enters evil string into vulnerable buffer passed nifty applet,
taking down innocent webmaster's system.  Posts astonishment on
#dickwar3z irc channel.
4.  Genuinely malevolent wiseguy/blackmailer/terrorist blackhat stores
sploit for later inclusion in rootkit-laying worm suite.
5.  Randal Schwartz goes to jail.

--Blair



From lee at leeHYPHENphillips.org.invalid  Fri Feb 24 11:55:15 2006
From: lee at leeHYPHENphillips.org.invalid (Lee Phillips)
Date: Fri, 24 Feb 2006 16:55:15 +0000 (UTC)
Subject: editor for Python on Linux
References: <dtai6e$23m$2@ariane.blic.net> <G5dLf.426$qX4.359@fe10.lga>
Message-ID: <slrndvuejj.h2g.lee@bad-bart.lcp.nrl.navy.mil>

The indentation-based folding in vim makes it great
for python; other folding editors might be almost as
good.


From larry.bates at websafe.com  Wed Feb 15 14:28:28 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Wed, 15 Feb 2006 13:28:28 -0600
Subject: Python, Forms, Databases
In-Reply-To: <1140030788.083799.45060@f14g2000cwb.googlegroups.com>
References: <1140030788.083799.45060@f14g2000cwb.googlegroups.com>
Message-ID: <xoOdnSSGbYRFHW7eRVn-og@comcast.com>

Tempo wrote:
> I have been looking around for a few days for ways to use Python with
> HTML forms. What I am interested in doing is placing the data that is
> submited through an HTML form and collected by Python into a MySQL
> database. I initially thought that I was going to be able to do this
> with ASP, but I found out that my web hosting provider doesn't have ASP
> support installed into their servers. Also, I couldn't find any dirt
> cheap hosting providers that did support Pyton and ASP together. The
> next solution I stumbled upon was to use Zope. However, I wasn't sure
> if I should spend more of my time looking into this or not, and I found
> a possible way around this, which is by using the CGI module. As you
> can see, I am somewhat new to Python web programming and I have
> confused myself. Can anybody name a few modules that I should look into
> and these modules are the ones that will allow me to accomplish what I
> am interested in doing? Thanks for your help.
> 
I'll bet you'll find that the cheapest way to to this is to use
PHP and MySQL (both free on even the lowest cost hosting plans).
A LOT more low cost hosting plans include PHP than Python.

-Larry Bates


From Ido.Yehieli at gmail.com  Thu Feb 16 06:52:53 2006
From: Ido.Yehieli at gmail.com (Ido Yehieli)
Date: 16 Feb 2006 03:52:53 -0800
Subject: apache mod_python problem
In-Reply-To: <1140052489.456343.143050@o13g2000cwo.googlegroups.com>
References: <1140042611.557816.247140@g14g2000cwa.googlegroups.com>
	<43f3b460$1@news.uni-ulm.de>
	<1140046112.527015.144420@g14g2000cwa.googlegroups.com>
	<1140052489.456343.143050@o13g2000cwo.googlegroups.com>
Message-ID: <1140090773.633768.67850@g47g2000cwa.googlegroups.com>

Hi Graham, thank you for that link but it didn't help.
I've followed the instructions, yet In the 'basic-content-handler'
section, after getting to the point where it says to add this to the
main Apache configuration file:

<Directory /some/directory>
AllowOverride FileInfo
</Directory>

I replaced /some/directory with the correct directory and restarted
apache2 and stilll get the same response - firwfox asks to save the
response to a file. Does it matter where in the apache2 configuration
file I've located these 3 lines? I've just added them at the end, just
before the last line: </VirtualHost>

Thank you in advance,
Ido.



From girodt at gmail.com  Wed Feb 15 17:19:37 2006
From: girodt at gmail.com (Thomas Girod)
Date: 15 Feb 2006 14:19:37 -0800
Subject: multiple inheritance
Message-ID: <1140041977.692748.133570@g43g2000cwa.googlegroups.com>

Hi.

I think I'm missing something about multiple inheritance in python.

I've got this code.

class Foo:
    def __init__(self):
        self.x = "defined by foo"
        self.foo = None

class Bar:
    def __init__(self):
        self.x = "defined by bar"
        self.bar = None

class Foobar(Foo,Bar):
    pass

fb = Foobar()
print fb.x
print fb.__dict__

which returns :

>>>
defined by foo
{'x': 'defined by foo', 'foo': None}

So I guess not defining __init__ in my class Foobar will call __init__
from my superclass Foo. Also __dict__ doesn't show an attribute
'bar':None so I guess Bar.__init__ is not called at all.

I would like to have a subclass with all attributes from superclasses
defined, and only the attribute from the first when there is conflict
(i.e. in this case, Foobar would be like this but with bar:None)

I tried this :

class Foobar(Foo,Bar):
    def __init__(self):
        Foo.__init__(self)
        Bar.__init__(self)

>>>
defined by bar
{'x': 'defined by bar', 'foo': None, 'bar': None}

Here I have all I want, except the value of 'x' comes from the 'Bar'
superclass rather than Foo. So, to have what I want, I would have to
invert the two calls to __init__ in order to have the right x value.

What I find awkward here is that the order of __init__ calls matters,
rather than the order of the classes in the class declaration.

Do you have any ideas of a way to get this multiple inheritance thing
solved without having to do those __init__ calls ?

Thomas



From lycka at carmen.se  Wed Feb 15 07:41:25 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 15 Feb 2006 13:41:25 +0100
Subject: Rethinking the Python tutorial
In-Reply-To: <1139947998.625810.307170@z14g2000cwz.googlegroups.com>
References: <dsfqv4$shc$1@wake.carmen.se>
	<1139947998.625810.307170@z14g2000cwz.googlegroups.com>
Message-ID: <dsv7hm$jo8$1@wake.carmen.se>

JW wrote:
> I started with the official tutorial.  It seemed up to date to me.
> Things that changed from 2.4 to 2.5 changed in the tutorial as well. 

Agreed. I mainly felt that A Byte of Python seems to go through
the features in Python in a more systematic way. The official
tutorial is being kept up to date concerning details, but it's
basically the same text as ten years ago. I think we owe a lot
of gratitude to Fred Drake and all the other peope who have put
a lot of efforts into the tutorial, but it's too much to expect
that they would transform it significantly. It was written a
long time ago, with different users, use cases and features in
mind.

If we would really get a user guide, I guess there is less reason
to have a differently organized tutorial though. Today, I guess we
suffer from the fact that the tutorial is the only place to describe
things that don't fit in the library reference in a user-oriented
way. Yet, the tutorial is not organized as a reference, and from
the purely tutorial point of view, it wouldn't have to be complete.

> I haven't tried "A Byte of Python", so I can't comment.

Please do. I've been programming Python since 1996, so I'm
really just guessing when I try to judge material for beginners.
My impression is that it's aa good and well organized tutorial.

> I tried to learn from "Dive into Python", but I found that it went too
> quickly. 

Right. I would not suggest replacing the official tutorial
with that. I see it more as a complement.

> "Dive into Python" is not being kept up to date.  The last revision was
> May 2004, and several things have changed since then.

Ok. There are two issues here I guess.

First of all, any official material needs to be kept up
to date, whether it's the old tutorial or a new one. It
might be too much to maintain both A Byte of Python and
one more text if we change tutorial(s).

Secondly, since Dive into Python goes beyond the core of
Python, with dependencies to third party stuff, I guess
it's more costly to maintain.

Perhaps it was a bad suggestion to include that. Thanks
for your feedback.

> I think the most important thing for a tutorial is a consistant style
> and a consistant idea of the user's capabilities.  This is easiest with
> a single maintainer, but requires constant dilligence and a subdued ego
> for a collaborative document.

On the other hand, one size doesn't fit all. Thus my suggestion
of two texts. With the 60+ links that I mentioned before, I don't
think the current way newbies are guided to tutorials is ideal.
There is too much to choose from and to little guidence for those
who try to figure out where to go. The information is also spread
out too much.

http://python.org/doc/
http://python.org/doc/2.4.2/ ==(?) http://docs.python.org/
http://wiki.python.org/moin/BeginnersGuide + sub pages
http://www.python.org/doc/Intros.html
etc...

If the content in these pages were cleaned up significantly
(it's like the wardrobes at home--we can't keep all that old
stuff just because it isn't broken. Throw out the stuff which
isn't essential) I guess we could have less official stuff
(e.g. just one tutorial) and clear links to the others.

Perhaps a better approach would be that Dive ino Python was
one of a smaller set of external links to tutorials, in a
cleaned up set of web pages. At least, it's not a problem today
that there are too few online Python tutorials on the web.


From bokr at oz.net  Fri Feb 10 17:59:46 2006
From: bokr at oz.net (Bengt Richter)
Date: Fri, 10 Feb 2006 22:59:46 GMT
Subject: * 'struct-like' list *
References: <1139245389.529742.317110@g43g2000cwa.googlegroups.com>
	<43e8c362.179938698@news.oz.net>
Message-ID: <43ed1939.464057479@news.oz.net>

On Tue, 07 Feb 2006 18:10:05 GMT, bokr at oz.net (Bengt Richter) wrote:
[...]
>----< ernesto.py >---------------------------------------------------------
[...]
Just noticed:
>        substrings = line.split()
>        if substrings and isinstance(substrings, list) and substrings[0] == 'Name:':
                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^--not needed

str.split always returns a list, even if it's length 1, so that was harmless but should be

         if substrings and substrings[0] == 'Name:':

(the first term is needed because ''.split() => [], to avoid [][0])
Sorry.

Regards,
Bengt Richter


From eight02645999 at yahoo.com  Wed Feb  8 21:35:01 2006
From: eight02645999 at yahoo.com (eight02645999 at yahoo.com)
Date: 8 Feb 2006 18:35:01 -0800
Subject: removing characters before writing to file
Message-ID: <1139452501.421306.44080@f14g2000cwb.googlegroups.com>

hi
i have some output that returns a lines of tuples eg

('sometext1', 1421248118, 1, 'P ')
('sometext2', 1421248338, 2, 'S ')
and so on
....

I tried this
re.sub(r" '() ",'',str(output)) but it only get rid of the ' and not
the braces. I need to write the output to a file such that

sometext1, 1421248118, 1, P
sometext2, 1421248338, 2, S

I also tried escaping , re.sub(r" '\(\) ",'',str(output)) but also did
not work
How can i get rid of the braces before writing to file? thanks



From adamm_n0 at spamm_blic.net  Sat Feb 25 07:14:43 2006
From: adamm_n0 at spamm_blic.net (Mladen Adamovic)
Date: Sat, 25 Feb 2006 13:14:43 +0100
Subject: graph display(please help)
In-Reply-To: <1140632612.736499.320330@g47g2000cwa.googlegroups.com>
References: <1140632612.736499.320330@g47g2000cwa.googlegroups.com>
Message-ID: <dtphj1$peb$1@ariane.blic.net>

questions? wrote:
> I heard from my friend who used to program in JAVA, it is really easy
> to do graph display in JAVA.
> Thanks for any suggestions!!!


Jython


-- 
Mladen Adamovic
home page: http://home.blic.net/adamm


From nospamformeSVP at gmail.com  Mon Feb 27 09:42:11 2006
From: nospamformeSVP at gmail.com (Don Taylor)
Date: Mon, 27 Feb 2006 09:42:11 -0500
Subject: Use of __slots__
In-Reply-To: <dtt9o8$ams$1@sea.gmane.org>
References: <dtt8ga$7b2$1@sea.gmane.org> <dtt9o8$ams$1@sea.gmane.org>
Message-ID: <dtv344$3sh$1@sea.gmane.org>

Steve Juranich wrote:

> I might be a little confused about a couple of things (I'm sure many will
> correct me if I'm not), but as I understand it the __slots__ attribute is a
> class-attribute, which means it cannot be modified by an instance of the
> class (think of a "static" class member, if you know C++).
> 
Interesting, actually I was only doing this while noodling around trying 
to learn Python.

Does Python have the notion of static class attributes?

Just what was going on when I redefined my __slots__ attribute?

It looks as if __slots__ is something really special, or I am managing 
to hide the original __slots__ value in my __init__ method but not 
really overriding its effect.

Don.




From bblais at bryant.edu  Thu Feb 23 14:08:23 2006
From: bblais at bryant.edu (Brian Blais)
Date: Thu, 23 Feb 2006 14:08:23 -0500
Subject: execfile time out?
Message-ID: <43FE0827.7000403@bryant.edu>

Hello,


I'd like to do something like:

try:
	execfile_timeout("somefile.py",5)   # time out after 5 seconds
except TimeOutError:
	print "this timed out!"


is there something that would do this?  I'd like to call "somefile.py", but if it has 
an infinite loop, I don't want to freeze at that point.  If it helps, this part of 
the code is already running in a thread, so I guess I could time-out the thread 
rather than the execfile.  Is there an easy way to do that?


		thanks,

			Brian Blais

-- 
-----------------

             bblais at bryant.edu
             http://web.bryant.edu/~bblais


From aleaxit at yahoo.com  Sun Feb 19 11:36:21 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 19 Feb 2006 08:36:21 -0800
Subject: How many web framework for python ?
References: <mailman.2085.1140244423.27775.python-list@python.org>
	<43f8718e$0$7344$626a54ce@news.free.fr>
Message-ID: <1hazzon.19mvhkv6sr8wiN%aleaxit@yahoo.com>

Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote:
   ...
> > There are very good web framework for java and ruby ,
> > Is there one for python ?
> 
> In fact, there are actually too much *good* python web frameworks.

Dear Mr. BDFL,

there are too many good web frameworks nowadays. Please eliminate three.

PS: I am *not* a crackpot!


Alex


From steve at REMOVETHIScyber.com.au  Fri Feb 24 04:55:01 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 24 Feb 2006 20:55:01 +1100
Subject: A C-like if statement
References: <hp-dnY20cusOnGPeRVn-rg@nmt.edu> <dtl04p$5q2$1@reader2.panix.com>
	<sdadnS6nfNnbmmPeRVn-sw@nmt.edu>
	<pan.2006.02.23.22.14.53.56541@REMOVETHIScyber.com.au>
	<mailman.2387.1140747896.27775.python-list@python.org>
Message-ID: <pan.2006.02.24.09.55.01.352228@REMOVETHIScyber.com.au>

On Thu, 23 Feb 2006 20:41:52 -0600, Terry Hancock wrote:

> On Fri, 24 Feb 2006 09:14:53 +1100
> "Steven D'Aprano" <steve at REMOVETHIScyber.com.au> wrote:
>> There are *reasons* why Python discourages functions with
>> side-effects. Side-effects make your code hard to test and
>> harder to debug.
> 
> You of course meant "expressions with side-effects".  Python
> is pretty good at making functions with side-effects. At
> least it is if you want them. ;-)

Yes, of course I meant that.

However, functions with side-effects are also discouraged. Unless
side-effects are the correct way to do whatever it is you are trying to
do, in which case they are encouraged.

*wink*


-- 
Steven.



From klachemin at comcast.net  Fri Feb 10 12:08:28 2006
From: klachemin at comcast.net (Kamilche)
Date: 10 Feb 2006 09:08:28 -0800
Subject: Legality of using Fonts
Message-ID: <1139591308.864757.154740@g44g2000cwa.googlegroups.com>

I have a question for all you Pythoneers out there. I'm making a game
with Python, and have a need for fonts. I am currently using a free
TrueType font, but am considering switching to a bitmap font instead.

Let's say I own a font, and use it in a paint program to 'draw some
text' on a picture that I slap up on the Internet. Everything's
probably fine, right? But what if I draw some text on a bitmap on the
hard drive, add drop shadows and decorations, and use it to 'blit' text
in a game? The answer is less obvious to me then.

Any advice you could offer would be greatly appreciated!

--Kamilche



From no at spam.com  Tue Feb 14 21:16:15 2006
From: no at spam.com (DH)
Date: Tue, 14 Feb 2006 20:16:15 -0600
Subject: Pythonic gui format?
In-Reply-To: <43f1e5c1$0$4756$636a55ce@news.free.fr>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<43f11990$0$667$626a54ce@news.free.fr>
	<a9KdnTPXHOGOr2zenZ2dnUVZ_vidnZ2d@comcast.com>
	<43f19d88$0$4761$636a55ce@news.free.fr>
	<HrKdnTDaI9YCfmzeRVn-pg@comcast.com>
	<43f1e5c1$0$4756$636a55ce@news.free.fr>
Message-ID: <t9mdncjHu9hxE2_eRVn-oA@comcast.com>

bruno at modulix wrote:
> DH wrote:
>> bruno at modulix wrote:
>>
>>> DH wrote:
>>>
>>>> Bruno Desthuilliers wrote:
>>>>
>>>>>> I am currently seeking for pythonic alternative for XML. 
>>>>>
>>>>> A pretty obvious one is dicts and lists. What about (Q&D):
>>>>
>>>> That's like JSON: http://www.json.org/example.html
>>>
>>> No, it's pure Python. It happens that JSON looks pretty close to Python,
>>> but that's another point.
>>
>> Python dict and lists ARE JSON.  The only difference that python can't
>> handle is multiline comments.
> 
> And what about true vs True and false vs False ?-)

The syntax is the same, except for, as I said, JSON's multiline comments.
The semantics do differ, but that has nothing to do with the user's
question, about an alternative to XML for data representation.  You
can use "true" or True or "null" or None or whatever semantic values
you want.

You can use the JSON library if you want.  But there really is no
need in this case.  Just import the file containing the dicts and lists.

> No, Python's dicts and lists are not JSON. 

Which are syntactically identical to JSON's.

 > They are Python's dicts and
> lists. JSON stands for JavaScript Object Notation, and AFAIK, Python and
> javascript are two different languages

No shit.


From swilson at acs.on.ca  Fri Feb  3 09:21:14 2006
From: swilson at acs.on.ca (swilson at acs.on.ca)
Date: 3 Feb 2006 06:21:14 -0800
Subject: HTMLDocument and Xpath
In-Reply-To: <1138968531.707677.74000@g14g2000cwa.googlegroups.com>
References: <1138930478.957440.104290@g14g2000cwa.googlegroups.com>
	<1138968531.707677.74000@g14g2000cwa.googlegroups.com>
Message-ID: <1138976474.052819.202050@z14g2000cwz.googlegroups.com>


Alan Kennedy wrote:
> [swilson at acs.on.ca]
> > Hi, I want to use xpath to scrape info from a website using pyXML but I
> > keep getting no results.
> >
> > For example, in the following, I want to return the text "Element1" I
> > can't get xpath to return anything at all.  What's wrong with this
> > code?
>
> Your xpath expression is wrong.
>
> > test = Evaluate('td', doc_node.documentElement)
>
> Try one of the following alternatives, all of which should work.
>
> test = Evaluate('//td', doc_node.documentElement)
> test = Evaluate('/html/body/table/tr/td', doc_node.documentElement)
> test = Evaluate('/html/body/table/tr/td[1]', doc_node.documentElement)
>
> HTH,
>
> Alan.

I tried all of those and in every case, test returns "[]".  Does
Evaluate only work with XML documents?

Shawn



From python at rcn.com  Thu Feb 16 12:51:45 2006
From: python at rcn.com (Raymond Hettinger)
Date: 16 Feb 2006 09:51:45 -0800
Subject: Does python have an internal list/dictionary of functions?
In-Reply-To: <mailman.2021.1140112084.27775.python-list@python.org>
References: <mailman.2021.1140112084.27775.python-list@python.org>
Message-ID: <1140112305.182151.287860@f14g2000cwb.googlegroups.com>

[Carl J. Van Arsdall]
> basically we have:
>
>  >>>def functA():
> ...  pass
>
>  >>> functA
> <function functA at 80db128>
>
> And what I'd like to do is:
>
>  >>>__internalFuncDict__['functA']
> <function functA at 80db128>

globals()['functA']



From onurb at xiludom.gro  Mon Feb 27 07:27:55 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Mon, 27 Feb 2006 13:27:55 +0100
Subject: Hiding a column at the root of a plone site ...
In-Reply-To: <mailman.2357.1140714676.27775.python-list@python.org>
References: <mailman.2357.1140714676.27775.python-list@python.org>
Message-ID: <4402f071$0$27936$626a54ce@news.free.fr>

Paul Ertz wrote:
> Hello,
> 
> We would like to hide the left column for the main/home page of our
> plone sites dynamically using a tal: expression.

Then please post on a Zope/Plone related mailing-list.


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From bonono at gmail.com  Fri Feb 10 12:22:47 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 10 Feb 2006 09:22:47 -0800
Subject: ordered sets operations on lists..
In-Reply-To: <mailman.1722.1139590689.27775.python-list@python.org>
References: <mailman.1722.1139590689.27775.python-list@python.org>
Message-ID: <1139592166.993686.212000@f14g2000cwb.googlegroups.com>


Amit Khemka wrote:
> Hello, Is there a *direct* way of doing set operations on lists which
> preserve the order of the input lists ?
> For Ex.  l1 = [1, 5, 3, 2, 4, 7]
>             l2 =  [3, 5,  10]
>
> and (l1 intersect l2)  returns [5, 3]     .... (and (l2 intersect l1)
> returns [3, 5])
>
what do you mean by "direct" way ? ugly(some said) one liner ?

filter(set(l1).intersection(set(l2)).__contains__, l1)
filter(set(l1).intersection(set(l2)).__contains__, l2)



From grflanagan at yahoo.co.uk  Wed Feb 15 04:15:04 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 15 Feb 2006 01:15:04 -0800
Subject: Excel and TrackChanges
References: <1139989519.840588.90820@z14g2000cwz.googlegroups.com>
Message-ID: <1139994904.451967.38560@g14g2000cwa.googlegroups.com>

pierre_py wrote:
> I have a problem with pycom automation with excel.
> If i use the following in my excel_wrapper:
> """
> self.Workbook.Save()
> self.Workbook.HighlightChangesOptions(When=1)
> self.Workbook.ListChangesOnNewSheet = True
> """
> I don't get any history worksheet. If i use 2 (xlAllChanges) or 3
> (xlNotYetReviewed), i get the history worksheet but with all results.
>
> I use Office 2k sp1.
>
> thanks in advance

What does '1' represent?  The first hit in Google for
"HighlightChangesOptions" suggests it may be 'xlSinceMyLastSave', so
maybe there are no changes to show? What happens if you comment out
"self.Workbook.Save()", or move it to below the other two lines?

Gerard



From rubic88 at gmail.com  Thu Feb 23 12:13:46 2006
From: rubic88 at gmail.com (Rubic)
Date: 23 Feb 2006 09:13:46 -0800
Subject: datetime iso8601 string input
Message-ID: <1140714826.044272.253460@t39g2000cwt.googlegroups.com>

I was a little surprised to recently discover
that datetime has no method to input a string
value.  PEP 321 appears does not convey much
information, but a timbot post from a couple
years ago clarifies things:

http://tinyurl.com/epjqc

> You can stop looking:  datetime doesn't
> support any kind of conversion from string.
> The number of bottomless pits in any datetime
> module is unbounded, and Guido declared this
> particular pit out-of-bounds at the start so
> that there was a fighting chance to get
> *anything* done for 2.3.

I can understand why datetime can't handle
arbitrary string inputs, but why not just
simple iso8601 format -- i.e. the default
output format for datetime?

Given a datetime-generated string:

  >>> now = str(datetime.datetime.now())
  >>> print now
  '2006-02-23 11:03:36.762172'

Why can't we have a function to accept it
as string input and return a datetime object?

  datetime.parse_iso8601(now)

Jeff Bauer
Rubicon, Inc.



From bobrien18 at yahoo.com  Wed Feb  1 23:09:33 2006
From: bobrien18 at yahoo.com (KraftDiner)
Date: 1 Feb 2006 20:09:33 -0800
Subject: nDimensional sparse histogram in python.
In-Reply-To: <1138852979.060845.249440@g44g2000cwa.googlegroups.com>
References: <1138848672.791908.90050@g44g2000cwa.googlegroups.com>
	<1ha3gff.u4comocxo4ddN%aleaxit@yahoo.com>
	<1138849589.663600.301610@z14g2000cwz.googlegroups.com>
	<1ha3hrb.z9fahb1cxs03zN%aleaxit@yahoo.com>
	<1138852458.567178.116980@g43g2000cwa.googlegroups.com>
	<1138852979.060845.249440@g44g2000cwa.googlegroups.com>
Message-ID: <1138853373.087911.167410@g14g2000cwa.googlegroups.com>

Many thanks everyone.

One last quick question...
The dictionary, I believe, is sorted by the key.
Is there a way to sort it by the value?
Say I wanted to put out a list of the frequency sorted by highest to
lowest?



From nnorwitz at gmail.com  Thu Feb  9 01:07:14 2006
From: nnorwitz at gmail.com (nnorwitz at gmail.com)
Date: 8 Feb 2006 22:07:14 -0800
Subject: Too Many if Statements?
In-Reply-To: <dscc9e$4mg$1@oravannahka.helsinki.fi>
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<dsaqkj$jhm$1@xenon.Stanford.EDU>
	<GU8Gf.22899$Jd.6095@newssvr25.news.prodigy.net>
	<dscc9e$4mg$1@oravannahka.helsinki.fi>
Message-ID: <1139465234.569736.140420@f14g2000cwb.googlegroups.com>

Juho Schultz wrote:
>
> However, the following gives a SystemError with only 2500 elif's.

SystemErrors should never occur, if you see one it's a bug.

[valid program which demonstrates a python bug]

> Traceback (most recent call last):
>    File "iftest.py", line 10, in ?
>      exec prog
> SystemError: com_backpatch: offset too large
>
> I tried this with Python 2.3.3 and 2.3.4 (Linux) and both fail.

Yup, 2.4 fails too.  Unfortunately, this looks like a bugger to fix in
2.4.  So I doubt it will be fixed for old versions of python.  The good
news is that it's fixed for 2.5.

n



From sean at buildingonline.com  Thu Feb 16 15:59:07 2006
From: sean at buildingonline.com (SMB)
Date: Thu, 16 Feb 2006 12:59:07 -0800
Subject: Merging two lists of data (Pythonic way)
References: <8k5Jf.27896$sA3.57@fed1read02>
	<1140122391.823206.74580@g14g2000cwa.googlegroups.com>
Message-ID: <AK5Jf.27901$sA3.22003@fed1read02>


"Jonathan Gardner" <jgardner at jonathangardner.net> wrote in message 
news:1140122391.823206.74580 at g14g2000cwa.googlegroups.com...
> codes = map(lambda x: x[0], list1)
> for d in list2:
>  if d['code'] in codes:
>    d['VERIFIED'] = 1
>
> Is this what you were looking for?
>

Actually, this is not exactly what I was looking for.  I failed to realize 
what map did, in this case using the labmda x: x[0] on each item of the list 
returning a list of the key numbers.  The problem is that the changes made 
to my dictionary (in my example dictionary["VERIFIED"]=1) needs to be based 
on the other values in each list in LIST1.

In my example LIST1 was defined as
[[5L, 1L, 1L, 'Personal Information'], [14L, 2L, 1L, '']]

So, the dictionary changes would be involving mylist[1:] for each mylist in 
LIST1 based on the comparison to mylist[0]...

Thank again 




From ram0812 at hotmail.com  Wed Feb  8 03:16:22 2006
From: ram0812 at hotmail.com (Raja Raman Sundararajan)
Date: 8 Feb 2006 00:16:22 -0800
Subject: Regular Expression Syntax Help
In-Reply-To: <1139345541.020330.102130@g43g2000cwa.googlegroups.com>
References: <1139324925.233027.26430@o13g2000cwo.googlegroups.com>
	<1139345541.020330.102130@g43g2000cwa.googlegroups.com>
Message-ID: <1139386582.933276.142260@o13g2000cwo.googlegroups.com>

Oh! yes you can use re for that.
You just need to change the pattern a bit

I did not understand where the "title" will be so I have ignored it,
but I got something below which will be helpful for you

>>> value = """name:asasasasas\nrequest: play\ntitle"""
>>> reg = re.compile('Name:.*\\nrequest:.....', re.IGNORECASE)
>>> re.findall(reg, value)
['name:asasasasas\nrequest: play']
>>> value2 = """name:asasasasas\nrequest: next\ntitle"""
>>> reg = re.compile('Name:.*\\nrequest:.....', re.IGNORECASE)
>>> re.findall(reg, value2)
['name:asasasasas\nrequest: next']
>>>



From bobrien18 at yahoo.com  Wed Feb  1 22:27:17 2006
From: bobrien18 at yahoo.com (KraftDiner)
Date: 1 Feb 2006 19:27:17 -0800
Subject: nDimensional sparse histogram in python.
In-Reply-To: <mailman.1340.1138850458.27775.python-list@python.org>
References: <1138848672.791908.90050@g44g2000cwa.googlegroups.com>
	<1ha3gff.u4comocxo4ddN%aleaxit@yahoo.com>
	<1138849589.663600.301610@z14g2000cwz.googlegroups.com>
	<mailman.1340.1138850458.27775.python-list@python.org>
Message-ID: <1138850837.309044.169130@g44g2000cwa.googlegroups.com>

The dictionary is sorted by the point key.
Is there a way to sort the dictionary by the value?
Seems to me this goes against the purpose of a dictionary but....
thats what I need to do..



From kent at kentsjohnson.com  Mon Feb 27 11:51:56 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Mon, 27 Feb 2006 11:51:56 -0500
Subject: Waiting for Connection
In-Reply-To: <1141055065.100567.199430@p10g2000cwp.googlegroups.com>
References: <1141055065.100567.199430@p10g2000cwp.googlegroups.com>
Message-ID: <44032991$1_3@newspeer2.tds.net>

D wrote:
> I am trying to do the following using Python and Tkinter:
> 
> 1)  Display a window with 1 button
> 2)  When user clicks the button, Python attempts to call a function
> that opens a socket and listens for a connection - what I want to do
> is, if the socket has been successfully opened and the system is
> waiting for a connection, to turn the button green.
> 
> The problem I'm having is when the button is clicked, the color never
> changes and the application "locks up" until the remote end connects
> and disconnects.  Where can I put the button configuration statement so
> that it will turn green to indicate the socket was opened successfully?

You need to give some time to the GUI so it can draw. A minimal solution 
is to call root.update_idletasks() after you set the button to green. If 
you want the GUI to be responsive you have to run the socket in a 
separate thread; this recipe may give you some help though it may be 
more complex than you need:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/82965

Kent


From bonono at gmail.com  Mon Feb 20 21:45:11 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 20 Feb 2006 18:45:11 -0800
Subject: In need of a virtual filesystem / archive
In-Reply-To: <1140489584.412886.201420@g47g2000cwa.googlegroups.com>
References: <1140489584.412886.201420@g47g2000cwa.googlegroups.com>
Message-ID: <1140489911.727086.294800@g14g2000cwa.googlegroups.com>

may be store them in sqlite ?

On linux, fuse can also be an interesting option, gmailfs is written in
python.

Enigma Curry wrote:
> I need to store a large number of files in an archive. From Python, I
> need to be able to create an archive, put files into it, modify files
> that are already in it, and delete files already in it.
>
> The easy solution would be to use a zip file or a tar file. Python has
> good standard modules for accessing those types. However, I would tend
> to think that modifying or deleting files in the archive would require
> rewriting the entire archive.
>
> Is there any archive format that can allow Python to modify a file in
> the archive *in place*? That is to say if my archive is 2GB large and I
> have a small text file in the archive I want to be able to modify that
> small text file (or delete it) without having to rewrite the entire
> archive to disk.
>
> Does anything like this exist? If nothing exists for Python, is there
> something written in C maybe that I could wrap (preferably you won't
> suggest wrapping the ext2 filesystem driver..  ;) ?



From sybrenUSE at YOURthirdtower.com.imagination  Tue Feb 28 03:37:57 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Tue, 28 Feb 2006 09:37:57 +0100
Subject: HTML/DOM parser
References: <1141115591.120432.221900@t39g2000cwt.googlegroups.com>
Message-ID: <slrne082v5.9s8.sybrenUSE@schuimige.unrealtower.org>

Xah Lee enlightened us with:
> is there a module that lets me parse validated html files and store
> it as a tree?

http://docs.python.org/lib/module-xml.dom.html

Assuming you're using XHTML.

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From siona at chiark.greenend.org.uk  Fri Feb 24 09:12:05 2006
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 24 Feb 2006 14:12:05 +0000 (GMT)
Subject: regular expresson for Unix and Dos Lineendings wanted
References: <jterv157550g4qd4rosc3a2o8l69gcau8v@4ax.com>
	<mailman.2346.1140703308.27775.python-list@python.org>
	<ujgrv19d4thh28cvh4emqi2m1p5g1gofuh@4ax.com>
Message-ID: <Lvr*nu8-q@news.chiark.greenend.org.uk>

Franz Steinhaeusler  <franz.steinhaeusler at gmx.at> wrote:
>On Thu, 23 Feb 2006 13:54:50 +0000, Martin Franklin
>>why not use string methods strip, rstrip and lstrip
>because this removes only the last spaces,
> [given r = 'erewr    \r\nafjdskl     ']
>I want:
>'erewr\r\nafjdskl'

os.linesep.join(l.rstrip() for l in r.split(os.linesep))

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From bonono at gmail.com  Tue Feb 21 04:24:12 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 21 Feb 2006 01:24:12 -0800
Subject: Little tool - but very big size... :-(
In-Reply-To: <mailman.2211.1140513270.27775.python-list@python.org>
References: <mailman.2211.1140513270.27775.python-list@python.org>
Message-ID: <1140513852.240140.144160@f14g2000cwb.googlegroups.com>

11MB is seldom a concern for today's machine.

Durumdara wrote:
> Hi !
>
> I have a problem.
> I have a little tool that can get data about filesystems and wrote it in
> python.
>
> The main user asked me a GUI for this software.
>
> This user is needed a portable program, so I create this kind of the
> software with Py2Exe.
>
> But it have very big size: 11 MB... :-(
>
> The dist directory:
> 2006.02.21.  10:09    <DIR>          .
> 2006.02.21.  10:09    <DIR>          ..
> 2005.09.28.  12:41            77 824 bz2.pyd
> 2006.02.21.  10:09                 0 dirlist.txt
> 2006.02.20.  12:51           611 384 library.zip
> 2006.02.15.  16:22            23 558 main.ico
> 2004.12.16.  17:22           348 160 MSVCR71.dll
> 2005.09.28.  12:41         1 867 776 python24.dll
> 2006.01.11.  12:19           102 400 pywintypes24.dll
> 2005.09.28.  12:41           405 504 unicodedata.pyd
> 2005.09.28.  12:41             4 608 w9xpopen.exe
> 2006.01.11.  12:19            73 728 win32api.pyd
> 2006.01.11.  12:20            81 920 win32file.pyd
> 2006.01.11.  12:26           106 496 win32security.pyd
> 2006.01.10.  19:09         4 943 872 wxmsw26uh_vc.dll
> 2006.02.20.  12:51            40 960 wxPyHDDirList.exe
> 2005.09.28.  12:41            69 632 zlib.pyd
> 2006.01.10.  19:13           626 688 _controls_.pyd
> 2006.01.10.  19:12           696 320 _core_.pyd
> 2006.01.10.  19:13           364 544 _gdi_.pyd
> 2006.01.10.  19:13           491 520 _misc_.pyd
> 2006.01.10.  19:13           548 864 _windows_.pyd
>               20 file        11 485 758 byte
>
> I need to have more compressed result. Can I compress dll-s, pyd-s with
> Py2Exe ?
> Can I decrease the total size with something ?
>
> If not, how to I create an self-unpackager and self-starter program that
> use an temporary directory in the disk ? With WinRar ?
> 
> Thanx for help:
> dd



From aleaxit at yahoo.com  Sat Feb 18 01:36:31 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Fri, 17 Feb 2006 22:36:31 -0800
Subject: Multi-threaded SSL
References: <1140240776.132359.57800@g14g2000cwa.googlegroups.com>
Message-ID: <1haxdd0.1m3ovx41i1g74uN%aleaxit@yahoo.com>

Kris Kowal <kris.kowal at gmail.com> wrote:
   ...
> I started with Twisted, but, having looked as far as I can see, SSL is
> either not implemented, or not documented for that library.  There are
> hints that it's in the works, but that's all.  So, I've moved on.

???  SSL is fully implemented in Twisted, AFAIK.  Is the example at
<http://twistedmatrix.com/projects/core/documentation/examples/echoserv_
ssl.py> at all unclear or mysterious, for example?


Alex


From exarkun at divmod.com  Fri Feb  3 16:14:26 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Fri, 3 Feb 2006 16:14:26 -0500
Subject: Another try at Python's selfishness
In-Reply-To: <ds0ed1$npe$1@sea.gmane.org>
Message-ID: <20060203211426.2697.1835776858.divmod.quotient.6256@ohm>

On Fri, 3 Feb 2006 15:27:51 -0500, Terry Reedy <tjreedy at udel.edu> wrote:
>
>"Magnus Lycka" <lycka at carmen.se> wrote in message
>news:drvd56$nb3$1 at wake.carmen.se...
>> n.estner at gmx.de wrote:
>> Today, Python has a syntactic shortcut. If 'a' is an
>> instance of class 'A', a.f(x,y,z) is a shortcut for
>> A.f(a,x,y,z). If you don't use the shortcut, there is
>> no magic at all, just the unusual occurence of a type
>> check in Python!
>
>As was once pointed out to me some years ago, when I wrote something
>similar, a.f() is not just a shortcut for A.f(a) [a.__class__.f(a)].   The
>latter only looks for f in the class A namespace while the former also
>looks in superclass namespaces.  The 'magical' part of accessing functions
>via instances is the implementation of dynamic inheritance.

I'm not sure I follow.  Surely you're not suggesting that this doesn't work:

    >>> class X:
    ...     def foo(self):
    ...         print 'X.foo', self
    ... 
    >>> class A(X):
    ...     pass
    ... 
    >>> o = A()
    >>> A.foo(o)
    X.foo <__main__.A instance at 0xb7cab64c>
    >>> 

But I can't think what else you might mean.

>
>Terry Jan Reedy
>
>
>
>--
>http://mail.python.org/mailman/listinfo/python-list
>


From michele.simionato at gmail.com  Wed Feb 22 10:30:16 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 22 Feb 2006 07:30:16 -0800
Subject: Python vs. Lisp -- please explain
In-Reply-To: <yfslkw5msih.fsf@oc.ex.ac.uk>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<yfspsljp321.fsf@oc.ex.ac.uk>
	<1140425017.101462.117380@g47g2000cwa.googlegroups.com>
	<yfslkw5msih.fsf@oc.ex.ac.uk>
Message-ID: <1140622216.436013.234400@g47g2000cwa.googlegroups.com>

I replied to this message yesterday, but it did not appear, so let's
try again.

I agree with your points, but I would not say that Lisp is
intrinsically more dynamic than Python
as a language; it is just more interactive and has more features (and
more complexities too).
BTW, regarding your first point on interactive sessions, are you aware
of Michael Hudson's recipe
"automatically upgrade class instances on reload()"
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/160164 ?

       Michele Simionato



From me at privacy.net  Tue Feb 14 16:58:42 2006
From: me at privacy.net (Charles)
Date: Tue, 14 Feb 2006 18:58:42 -0300
Subject: How can I find a freelance programmer?
References: <op.s4y9v9olix6gqv@charles>
	<mailman.1918.1139950011.27775.python-list@python.org>
Message-ID: <op.s4zgn4x5ix6gqv@charles>

On Tue, 14 Feb 2006 17:46:46 -0300, Tim Parkin <tim at pollenation.net> wrote:

> You could ask Steve Holden?  -  that'll be 10% commission Steve! ;-)

Him: http://sholden.typepad.com/ ?


-- 
Charles.

Desenvolvimento e cria??o de sites: www.auriance.com
Hospedagem de sites e servidores dedicados: www.auriance.net


From niemand.leermann at thomas-guettler.de  Sun Feb  5 07:59:27 2006
From: niemand.leermann at thomas-guettler.de (Thomas Guettler)
Date: Sun, 05 Feb 2006 13:59:27 +0100
Subject: Webmail with Python
References: <pan.2006.02.04.20.02.29.212441@thomas-guettler.de>
	<CPmdnQJE1oHmvHjenZ2dnUVZ_tadnZ2d@comcast.com>
Message-ID: <pan.2006.02.05.12.59.26.132254@thomas-guettler.de>

On Sat, 04 Feb 2006 15:50:00 -0600, Larry Bates wrote:

> Thomas Guettler wrote:
>> Hi,
>> 
>> Is there an application like Squirrelmail[1] written in python?
>> 
>> I want to access IMAP folder with a web-browser.
>> 
>> Google shows me some dead projects. Most webmail applications
>> seem to be written in PHP. Is there a useable webmailer written
>> in python?
>> 
>> 
>>  Thomas
>> 
> Google turned up the following:
> 
> http://bobomail.sourceforge.net/


The last release is soon four years old. I think it is dead.

Look at the last message in the mailing list:

http://sourceforge.net/mailarchive/forum.php?thread_id=8807764&forum_id=6902

 Thomas

-- 
Thomas Guettler, http://www.thomas-guettler.de/
E-Mail: guettli (*) thomas-guettler + de
Spam Catcher: niemand.leermann at thomas-guettler.de




From steve at REMOVETHIScyber.com.au  Sun Feb  5 03:25:21 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sun, 05 Feb 2006 19:25:21 +1100
Subject: Does Python support a peek like method for its file objects?
References: <4s3bu1p178o46hh0jcj0eld5git5paog4q@4ax.com>
Message-ID: <pan.2006.02.05.08.25.20.749932@REMOVETHIScyber.com.au>

On Sun, 05 Feb 2006 05:45:24 +0000, Avi Kak wrote:

> Hello:
> 
>   Does Python support a peek like method for its file objects?
> 
>   I'd like to be able to look at the next byte in a disk file before
>   deciding whether I should read it with, say, the read() method.
>   Is it possible to do so in Python?


# WARNING: untested

fp = file("some file on disk", "rb")
b = ""
while 1:
    # peek at the next byte
    c = fp.read(1)
    # decide whether to read it
    if c == "?":
        # pretend we never read the byte
        del c
        fp.seek(-1, 1)  # but be careful in text mode!
        break
    # now read the byte "for real"
    b = fp.read(1)
    if not b:
        # we've reached the end of the file
        break
fp.close()

I'm not sure exactly why you'd want to do this, but it should be doable,
at least for files that support seeking.



-- 
Steven.



From claudio.grondi at freenet.de  Fri Feb 24 13:30:59 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Fri, 24 Feb 2006 19:30:59 +0100
Subject: [ANN] httpy 0.9.0 -- a sane and robust HTTP library for Python
In-Reply-To: <jr2uv15aoqd3dott5dfhchehcrril9891c@4ax.com>
References: <mailman.2393.1140786497.27775.python-announce-list@python.org>
	<jr2uv15aoqd3dott5dfhchehcrril9891c@4ax.com>
Message-ID: <dtnjd4$m6m$1@newsreader3.netcologne.de>

Rene Pijlman wrote:
> Chad Whitacre:
> 
>>I am pleased to announce the first public release of httpy -- a sane and 
>>robust HTTP library for Python. With httpy, you write "responders," and 
>>put them on the network with "couplers." Here is a trivial responder:
>>
>>  import httpy
>>
>>  class Responder:
>>    def respond(request):
>>      raise httpy.Response(200, "Greetings, program!")
>>
>>
>>And here is how to couple it:
>>
>>  responder = Responder()
>>  coupler = httpy.couplers.StandAlone(responder)
>>  coupler.go()
>>
>>httpy is so amazing, in fact, that with it I was able to write an entire 
>>wiki in only 20 seconds!
> 
> 
> Now that's what I call a short learning curve. So can this replace Zope
> then? Or mod_python? Apache? CGI? All of those?
> 
The example given does not run on my system:

Traceback (most recent call last):
   File "HowToUse_httpy.py", line 7, in ?
     coupler = httpy.couplers.StandAlone(responder)
   File 
"C:\Python24\Lib\site-packages\httpy\couplers\standalone\coupler.py", 
line 36, in __init__
     responder = add_api(responder, root, uri)
   File "C:\Python24\Lib\site-packages\httpy\couplers\utils.py", line 
24, in add_api
     verifyObject(IResponder, responder, tentative=True)
   File "C:\Python24\Lib\site-packages\httpy\_zope\interface\verify.py", 
line 96, in verifyObject
     return _verify(iface, candidate, tentative, vtype='o')
   File "C:\Python24\Lib\site-packages\httpy\_zope\interface\verify.py", 
line 88, in _verify
     raise BrokenMethodImplementation(name, mess)
httpy._zope.interface.exceptions.BrokenMethodImplementation: The 
implementation of respond violates its contract
         because implementation doesn't allow enough arguments.

What are the requirements? Zope?

Claudio


From tim.leeuwvander at nl.unisys.com  Fri Feb 10 12:14:22 2006
From: tim.leeuwvander at nl.unisys.com (Tim N. van der Leeuw)
Date: 10 Feb 2006 09:14:22 -0800
Subject: Detecting filename-encoding (on WinXP)?
In-Reply-To: <9amou1t8ld8ms4466q8m6o0jlk7shm43k7@4ax.com>
References: <1138896194.914220.60080@o13g2000cwo.googlegroups.com>
	<9amou1t8ld8ms4466q8m6o0jlk7shm43k7@4ax.com>
Message-ID: <1139591662.732314.189920@o13g2000cwo.googlegroups.com>

Actually, the directory-name comes in as a URL and as such I had no
problems yet just creating a unicode-string from it which I can pass to
os.walk(), and get proper unicode-filenames back from it.
Then I can encode them into utf-8 and pass them to the database-layer
and it all works.

cheers,

--Tim



From franz.steinhaeusler at gmx.at  Fri Feb 24 03:44:31 2006
From: franz.steinhaeusler at gmx.at (Franz Steinhaeusler)
Date: Fri, 24 Feb 2006 09:44:31 +0100
Subject: regular expresson for Unix and Dos Lineendings wanted
References: <jterv157550g4qd4rosc3a2o8l69gcau8v@4ax.com>
Message-ID: <dohtv1h996df7h2jhdn3i283gac99rra3b@4ax.com>

On Thu, 23 Feb 2006 14:46:20 +0100, Franz Steinhaeusler
<franz.steinhaeusler at gmx.at> wrote:

>Hello, I need a regularexpression, which trims trailing whitespaces.
>
>While with unix line endings, it works; 
>but not with Window (Dos) CRLF's:

Thank you all for the replies.
But I still don't have a solution.

Of course with more lines it is possible, 
but it would be fine to have a "oneliner".

-- 
Franz Steinhaeusler


From davidworley at gmail.com  Mon Feb 13 21:36:59 2006
From: davidworley at gmail.com (Dave)
Date: 13 Feb 2006 18:36:59 -0800
Subject: Loop Backwards
In-Reply-To: <1139884285.356559.101290@z14g2000cwz.googlegroups.com>
References: <1139883877.323042.199040@o13g2000cwo.googlegroups.com>
	<1139884285.356559.101290@z14g2000cwz.googlegroups.com>
Message-ID: <1139884619.925925.219670@g43g2000cwa.googlegroups.com>

Thanks! I knew it was simple...



From treelif at gmail.com  Thu Feb 16 09:16:46 2006
From: treelif at gmail.com (treelife)
Date: 16 Feb 2006 06:16:46 -0800
Subject: mod_python help!
Message-ID: <1140099406.395361.293670@z14g2000cwz.googlegroups.com>

I'm getting and internal server error when | run the following
mod_python script.  I am actually trying to run Django.

Script:

from mod_python import apache

def handler(req):
    req.content_type = 'text/plain'
    req.write("Under Construction")
    return apache.OK

Here is some other relevant info.  Hope this is not too much:

Debian 3.x/python2.3.5/mod_python3.1.3/Apache2.0.54

from the command line test:

>>> import  mod_python.psp

Traceback ( most recent call last ):
   File "<stdin>", line 1,in ?
  File "/usr/lib/python2.3/site-packages/mod_python/psp.py",line20, in
?
import apache,Session,util,-psp

File "/usr/lib/python2.3/site-packages/mod_python/apache.py,line28,in ?
import _apache

ImportError: No Module named _apache

...................................................................................................

Virtual Server Configuration

NameVirtualHost *

<VirtualHost *>
  	ServerName www.wyah-webs.com
	ServerAlias wyah-webs.com  *.wyah-webs.com
	DocumentRoot /var/www/wyah-webs
	ServerAdmin webmaster at localhost

	<Directory />
		Options FollowSymLinks
		AllowOverride None
	</Directory>
        DirectoryIndex index.html mptest.py
	<Directory /var/www/wyah-webs >
                AddHandler  mod_python .py
                PythonHandler mptest
                PythonDebug On
	</Directory>


       <Location "/var/www/wyah-webs/ard">
       SetHandler mod_python
       PythonHandler django.core.handlers.modpython
       SetEnv DJANGO_SETTINGS_MODULE ard_proj.settings
       PythonDebug On
       </Location>

       <Location "/var/www/wyah-webs/ard/media">
       SetHandler none
       </Location>

        ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
	<Directory "/usr/lib/cgi-bin">
		AllowOverride None
		Options ExecCGI -MultiViews +SymLinksIfOwnerMatch
		Order allow,deny
		Allow from all
	</Directory>

	ErrorLog /var/log/apache2/www.wyah-webs.com_error.log

	# Possible values include: debug, info, notice, warn, error, crit,
	# alert, emerg.
	LogLevel warn

	CustomLog /var/log/apache2/www.wyah-webs.com_access.log combined
	ServerSignature On
#    Alias /doc/ "/usr/share/doc/"
#    <Directory "/usr/share/doc/">
#        Options Indexes MultiViews FollowSymLinks
#        AllowOverride None
#        Order deny,allow
#        Deny from all
#        Allow from 127.0.0.0/255.0.0.0 ::1/128
#    </Directory>

</VirtualHost>
.......................................................................................................
main server configuration

# Based upon the NCSA server configuration files originally by Rob
McCool.
# Changed extensively for the Debian package by Daniel Stone
<daniel at sfarc.net>
# and also by Thom May <thom at debian.org>.

# ServerRoot: The top of the directory tree under which the server's
# configuration, error, and log files are kept.
#
# NOTE!  If you intend to place this on an NFS (or otherwise network)
# mounted filesystem then please read the LockFile documentation
# (available at
<URL:http://www.apache.org/docs/mod/core.html#lockfile>);
# you will save yourself a lot of trouble.

ServerRoot "/etc/apache2"

# The LockFile directive sets the path to the lockfile used when Apache
# is compiled with either USE_FCNTL_SERIALIZED_ACCEPT or
# USE_FLOCK_SERIALIZED_ACCEPT. This directive should normally be left
at
# its default value. The main reason for changing it is if the logs
# directory is NFS mounted, since the lockfile MUST BE STORED ON A
LOCAL
# DISK. The PID of the main server process is automatically appended to
# the filename.

LockFile /var/lock/apache2/accept.lock

# PidFile: The file in which the server should record its process
# identification number when it starts.

PidFile /var/run/apache2.pid

# Timeout: The number of seconds before receives and sends time out.

Timeout 300

# KeepAlive: Whether or not to allow persistent connections (more than
# one request per connection). Set to "Off" to deactivate.

KeepAlive On

# MaxKeepAliveRequests: The maximum number of requests to allow
# during a persistent connection. Set to 0 to allow an unlimited
amount.
# We recommend you leave this number high, for maximum performance.

MaxKeepAliveRequests 100

# KeepAliveTimeout: Number of seconds to wait for the next request from
the
# same client on the same connection.

KeepAliveTimeout 15

##
## Server-Pool Size Regulation (MPM specific)
##

# prefork MPM
# StartServers ......... number of server processes to start
# MinSpareServers ...... minimum number of server processes which are
kept spare
# MaxSpareServers ...... maximum number of server processes which are
kept spare
# MaxClients ........... maximum number of server processes allowed to
start
# MaxRequestsPerChild .. maximum number of requests a server process
serves
<IfModule prefork.c>
StartServers         5
MinSpareServers      5
MaxSpareServers     10
MaxClients          20
MaxRequestsPerChild  0
</IfModule>

# pthread MPM
# StartServers ......... initial  number of server processes to start
# MaxClients ........... maximum  number of server processes allowed to
start
# MinSpareThreads ...... minimum  number of worker threads which are
kept spare
# MaxSpareThreads ...... maximum  number of worker threads which are
kept spare
# ThreadsPerChild ...... constant number of worker threads in each
server process
# MaxRequestsPerChild .. maximum  number of requests a server process
serves
<IfModule worker.c>
StartServers         2
MaxClients         150
MinSpareThreads     25
MaxSpareThreads     75
ThreadsPerChild     25
MaxRequestsPerChild  0
</IfModule>

# perchild MPM
# NumServers ........... constant number of server processes
# StartThreads ......... initial  number of worker threads in each
server process
# MinSpareThreads ...... minimum  number of worker threads which are
kept spare
# MaxSpareThreads ...... maximum  number of worker threads which are
kept spare
# MaxThreadsPerChild ... maximum  number of worker threads in each
server process
# MaxRequestsPerChild .. maximum  number of connections per server
process (then it dies)
<IfModule perchild.c>
NumServers           5
StartThreads         5
MinSpareThreads      5
MaxSpareThreads     10
MaxThreadsPerChild  20
MaxRequestsPerChild  0
AcceptMutex fcntl
</IfModule>

User www-data
Group www-data

# The following directives define some format nicknames for use with
# a CustomLog directive (see below).
LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\"
\"%{User-Agent}i\"" combined
LogFormat "%h %l %u %t \"%r\" %>s %b" common
LogFormat "%{Referer}i -> %U" referer
LogFormat "%{User-agent}i" agent


# Global error log.
ErrorLog /var/log/apache2/error.log

# Include module configuration:
Include /etc/apache2/mods-enabled/*.load
Include /etc/apache2/mods-enabled/*.conf

# Include all the user configurations:
Include /etc/apache2/httpd.conf

# Include ports listing
Include /etc/apache2/ports.conf

# Include generic snippets of statements
Include /etc/apache2/conf.d/[^.#]*

#Let's have some Icons, shall we?
Alias /icons/ "/usr/share/apache2/icons/"
<Directory "/usr/share/apache2/icons">
    Options Indexes MultiViews
    AllowOverride None
    Order allow,deny
    Allow from all
</Directory>

# Set up the default error docs.
#
# Customizable error responses come in three flavors:
# 1) plain text 2) local redirects 3) external redirects
#
# Some examples:
#ErrorDocument 500 "The server made a boo boo."
#ErrorDocument 404 /missing.html
#ErrorDocument 404 "/cgi-bin/missing_handler.pl"
#ErrorDocument 402 http://www.example.com/subscription_info.html
#

#
# Putting this all together, we can Internationalize error responses.
#
# We use Alias to redirect any /error/HTTP_<error>.html.var response to
# our collection of by-error message multi-language collections.  We
use
# includes to substitute the appropriate text.
#
# You can modify the messages' appearance without changing any of the
# default HTTP_<error>.html.var files by adding the line;
#
#   Alias /error/include/ "/your/include/path/"
#
# which allows you to create your own set of files by starting with the
# /usr/local/apache2/error/include/ files and
# copying them to /your/include/path/, even on a per-VirtualHost basis.
#

<IfModule mod_negotiation.c>
<IfModule mod_include.c>
    Alias /error/ "/usr/share/apache2/error/"

    <Directory "/usr/share/apache2/error">
        AllowOverride None
        Options IncludesNoExec
        AddOutputFilter Includes html
        AddHandler type-map var
        Order allow,deny
        Allow from all
        LanguagePriority en es de fr
        ForceLanguagePriority Prefer Fallback
    </Directory>

    ErrorDocument 400 /error/HTTP_BAD_REQUEST.html.var
    ErrorDocument 401 /error/HTTP_UNAUTHORIZED.html.var
    ErrorDocument 403 /error/HTTP_FORBIDDEN.html.var
    ErrorDocument 404 /error/HTTP_NOT_FOUND.html.var
    ErrorDocument 405 /error/HTTP_METHOD_NOT_ALLOWED.html.var
    ErrorDocument 408 /error/HTTP_REQUEST_TIME_OUT.html.var
    ErrorDocument 410 /error/HTTP_GONE.html.var
    ErrorDocument 411 /error/HTTP_LENGTH_REQUIRED.html.var
    ErrorDocument 412 /error/HTTP_PRECONDITION_FAILED.html.var
    ErrorDocument 413 /error/HTTP_REQUEST_ENTITY_TOO_LARGE.html.var
    ErrorDocument 414 /error/HTTP_REQUEST_URI_TOO_LARGE.html.var
    ErrorDocument 415 /error/HTTP_SERVICE_UNAVAILABLE.html.var
    ErrorDocument 500 /error/HTTP_INTERNAL_SERVER_ERROR.html.var
    ErrorDocument 501 /error/HTTP_NOT_IMPLEMENTED.html.var
    ErrorDocument 502 /error/HTTP_BAD_GATEWAY.html.var
    ErrorDocument 503 /error/HTTP_SERVICE_UNAVAILABLE.html.var
    ErrorDocument 506 /error/HTTP_VARIANT_ALSO_VARIES.html.var

</IfModule>
</IfModule>

DirectoryIndex index.html index.py  index.cgi index.pl index.php
index.xhtml

# UserDir is now a module
#UserDir public_html
#UserDir disabled root

#<Directory /home/*/public_html>
#	AllowOverride FileInfo AuthConfig Limit
#	Options Indexes SymLinksIfOwnerMatch IncludesNoExec
#</Directory>

AccessFileName .htaccess

<Files ~ "^\.ht">
    Order allow,deny
    Deny from all
</Files>
#GDF# This gives what was typed by client browser, as self-referential
URL.
#GDF# "With UseCanonicalName off Apache will form self-referential URLs

#GDF# using the hostname and port supplied by the client if any are
supplied."
UseCanonicalName Off

TypesConfig /etc/mime.types
DefaultType text/plain

HostnameLookups Off

IndexOptions FancyIndexing VersionSort

AddIconByEncoding (CMP,/icons/compressed.gif) x-compress x-gzip

AddIconByType (TXT,/icons/text.gif) text/*
AddIconByType (IMG,/icons/image2.gif) image/*
AddIconByType (SND,/icons/sound2.gif) audio/*
AddIconByType (VID,/icons/movie.gif) video/*

# This really should be .jpg.

AddIcon /icons/binary.gif .bin .exe
AddIcon /icons/binhex.gif .hqx
AddIcon /icons/tar.gif .tar
AddIcon /icons/world2.gif .wrl .wrl.gz .vrml .vrm .iv
AddIcon /icons/compressed.gif .Z .z .tgz .gz .zip
AddIcon /icons/a.gif .ps .ai .eps
AddIcon /icons/layout.gif .html .shtml .htm .pdf
AddIcon /icons/text.gif .txt
AddIcon /icons/c.gif .c
AddIcon /icons/p.gif .pl .py
AddIcon /icons/f.gif .for
AddIcon /icons/dvi.gif .dvi
AddIcon /icons/uuencoded.gif .uu
AddIcon /icons/script.gif .conf .sh .shar .csh .ksh .tcl
AddIcon /icons/tex.gif .tex
AddIcon /icons/bomb.gif core

AddIcon /icons/back.gif ..
AddIcon /icons/hand.right.gif README
AddIcon /icons/folder.gif ^^DIRECTORY^^
AddIcon /icons/blank.gif ^^BLANKICON^^


# This is from Matty J's patch. Anyone want to make the icons?
#AddIcon /icons/dirsymlink.jpg ^^SYMDIR^^
#AddIcon /icons/symlink.jpg ^^SYMLINK^^

DefaultIcon /icons/unknown.gif

ReadmeName README.html
HeaderName HEADER.html

IndexIgnore .??* *~ *# HEADER* RCS CVS *,t

AddEncoding x-compress Z
AddEncoding x-gzip gz tgz

AddLanguage da .dk
AddLanguage nl .nl
AddLanguage en .en
AddLanguage et .et
AddLanguage fr .fr
AddLanguage de .de
AddLanguage el .el
AddLanguage it .it
AddLanguage ja .ja
AddLanguage pl .po
AddLanguage ko .ko
AddLanguage pt .pt
AddLanguage no .no
AddLanguage pt-br .pt-br
AddLanguage ltz .ltz
AddLanguage ca .ca
AddLanguage es .es
AddLanguage sv .se
AddLanguage cz .cz
AddLanguage ru .ru
AddLanguage tw .tw
AddLanguage zh-tw .tw

LanguagePriority en da nl et fr de el it ja ko no pl pt pt-br ltz ca es
sv tw


#AddDefaultCharset	ISO-8859-1

AddCharset ISO-8859-1  .iso8859-1  .latin1
AddCharset ISO-8859-2  .iso8859-2  .latin2 .cen
AddCharset ISO-8859-3  .iso8859-3  .latin3
AddCharset ISO-8859-4  .iso8859-4  .latin4
AddCharset ISO-8859-5  .iso8859-5  .latin5 .cyr .iso-ru
AddCharset ISO-8859-6  .iso8859-6  .latin6 .arb
AddCharset ISO-8859-7  .iso8859-7  .latin7 .grk
AddCharset ISO-8859-8  .iso8859-8  .latin8 .heb
AddCharset ISO-8859-9  .iso8859-9  .latin9 .trk
AddCharset ISO-2022-JP .iso2022-jp .jis
AddCharset ISO-2022-KR .iso2022-kr .kis
AddCharset ISO-2022-CN .iso2022-cn .cis
AddCharset Big5        .Big5       .big5
# For russian, more than one charset is used (depends on client,
mostly):
AddCharset WINDOWS-1251 .cp-1251   .win-1251
AddCharset CP866       .cp866
AddCharset KOI8-r      .koi8-r .koi8-ru
AddCharset KOI8-ru     .koi8-uk .ua
AddCharset ISO-10646-UCS-2 .ucs2
AddCharset ISO-10646-UCS-4 .ucs4
AddCharset UTF-8       .utf8

AddCharset GB2312      .gb2312 .gb
AddCharset utf-7       .utf7
AddCharset utf-8       .utf8
AddCharset big5	       .big5 .b5
AddCharset EUC-TW      .euc-tw
AddCharset EUC-JP      .euc-jp
AddCharset EUC-KR      .euc-kr
AddCharset shift_jis   .sjis

AddType application/x-httpd-php .php
AddType application/x-httpd-php-source .phps

AddType application/x-tar .tgz

# To use CGI scripts outside /cgi-bin/:
#
AddHandler cgi-script .cgi

# To use server-parsed HTML files
#
<FilesMatch "\.shtml(\..+)?$">
    SetOutputFilter INCLUDES
</FilesMatch>

# If you wish to use server-parsed imagemap files, use
#
#AddHandler imap-file map

BrowserMatch "Mozilla/2" nokeepalive
BrowserMatch "MSIE 4\.0b2;" nokeepalive downgrade-1.0
force-response-1.0
BrowserMatch "RealPlayer 4\.0" force-response-1.0
BrowserMatch "Java/1\.0" force-response-1.0
BrowserMatch "JDK/1\.0" force-response-1.0

#
# The following directive disables redirects on non-GET requests for
# a directory that does not include the trailing slash.  This fixes a
# problem with Microsoft WebFolders which does not appropriately handle

# redirects for folders with DAV methods.
#

BrowserMatch "Microsoft Data Access Internet Publishing Provider"
redirect-carefully
BrowserMatch "^WebDrive" redirect-carefully
BrowserMatch "^gnome-vfs" redirect-carefully
BrowserMatch "^WebDAVFS/1.[012]" redirect-carefully

# Allow server status reports, with the URL of
http://servername/server-status
# Change the ".your_domain.com" to match your domain to enable.
#
ExtendedStatus On
<Location /server-status>
    SetHandler server-status
    Order deny,allow
    Deny from all
    Allow from 127.0.0.1
</Location>

# Allow remote server configuration reports, with the URL of
#  http://servername/server-info (requires that mod_info.c be loaded).
# Change the ".your_domain.com" to match your domain to enable.
#
<Location /server-info>
    SetHandler server-info
    Order deny,allow
    Deny from all
    Allow from 127.0.0.1
</Location>

# Include the virtual host configurations:
Include /etc/apache2/sites-enabled/[^.#]*

#
# Directives to allow use of AWStats as a CGI
#
Alias /awstatsclasses "/usr/share/awstats/classes/"
Alias /awstatscss "/usr/share/awstats/css/"
Alias /awstatsicons "/usr/share/awstats/icon/"
ScriptAlias /awstats/ "/usr/lib/cgi-bin/"

#
# This is to permit URL access to scripts/files in AWStats directory.
#
<Directory "/usr/share/awstats">
    Options None
    AllowOverride None
    Order allow,deny
    Allow from all
</Directory>

........................................................................................................

Virtual host error ( part)


[Wed Feb 15 06:59:33 2006] [error] [client 200.50.71.66] File does not
exist: /var/www/wyah-webs/favicon.ico
[Wed Feb 15 06:59:33 2006] [error] [client 200.50.71.66] File does not
exist: /var/www/wyah-webs/favicon.ico
[Wed Feb 15 07:08:46 2006] [error] [client 200.50.71.66] File does not
exist: /var/www/wyah-webs/favicon.ico
[Wed Feb 15 07:08:46 2006] [error] [client 200.50.71.66] File does not
exist: /var/www/wyah-webs/favicon.ico
[Wed Feb 15 07:12:57 2006] [error] [client 200.50.71.66] File does not
exist: /var/www/wyah-webs/favicon.ico
[Wed Feb 15 07:25:58 2006] [error] [client 200.50.71.24] File does not
exist: /var/www/wyah-webs/favicon.ico
[Wed Feb 15 09:05:41 2006] [error] [client 200.50.71.43] File does not
exist: /var/www/wyah-webs/favicon.ico
[Wed Feb 15 09:05:41 2006] [error] [client 200.50.71.43] File does not
exist: /var/www/wyah-webs/favicon.ico
[Wed Feb 15 09:30:43 2006] [error] [client 200.50.71.43] File does not
exist: /var/www/wyah-webs/favicon.ico
[Wed Feb 15 09:30:43 2006] [error] [client 200.50.71.43] File does not
exist: /var/www/wyah-webs/favicon.ico
[Wed Feb 15 09:30:48 2006] [error] [client 200.50.71.43] File does not
exist: /var/www/wyah-webs/favicon.ico
[Wed Feb 15 09:30:48 2006] [error] [client 200.50.71.43] File does not
exist: /var/www/wyah-webs/favicon.ico
[Wed Feb 15 09:33:46 2006] [error] [client 200.50.71.43] File does not
exist: /var/www/wyah-webs/favicon.ico
[Wed Feb 15 09:33:46 2006] [error] [client 200.50.71.43] File does not
exist: /var/www/wyah-webs/favicon.ico
[Wed Feb 15 09:33:48 2006] [error] [client 200.50.71.43] File does not
exist: /var/www/wyah-webs/favicon.ico
[Wed Feb 15 09:33:49 2006] [error] [client 200.50.71.43] File does not
exist: /var/www/wyah-webs/favicon.ico
[Wed Feb 15 10:17:06 2006] [error] [client 200.50.71.43] File does not
exist: /var/www/wyah-webs/favicon.ico
[Wed Feb 15 10:17:06 2006] [error] [client 200.50.71.43] File does not
exist: /var/www/wyah-webs/favicon.ico
[Wed Feb 15 10:30:57 2006] [error] [client 200.50.71.43] File does not
exist: /var/www/wyah-webs/favicon.ico
[Wed Feb 15 13:45:24 2006] [error] [client 200.50.71.77] File does not
exist: /var/www/wyah-webs/favicon.ico
[Wed Feb 15 13:45:24 2006] [error] [client 200.50.71.77] File does not
exist: /var/www/wyah-webs/favicon.ico
[Wed Feb 15 14:05:07 2006] [error] [client 200.50.71.77] File does not
exist: /var/www/wyah-webs/favicon.ico
[Wed Feb 15 14:05:07 2006] [error] [client 200.50.71.77] File does not
exist: /var/www/wyah-webs/favicon.ico

Note: I did in fact create the icon
...............................................................................................................................

main server error.log(part)


[Wed Feb 15 10:13:50 2006] [notice] mod_python: Creating 20 session
mutexes based on 20 max processes and 0 max threads.
[Wed Feb 15 10:13:50 2006] [notice] Apache/2.0.54 (Debian GNU/Linux)
mod_python/3.1.3 Python/2.3.5 mod_ssl/2.0.54 OpenSSL/0.9.7e configured
-- resuming normal operations
[Wed Feb 15 10:16:48 2006] [notice] Graceful restart requested, doing
restart
[Wed Feb 15 10:16:52 2006] [warn] NameVirtualHost *:0 has no
VirtualHosts
[Wed Feb 15 10:16:52 2006] [notice] mod_python: Creating 20 session
mutexes based on 20 max processes and 0 max threads.
[Wed Feb 15 10:16:52 2006] [notice] Apache/2.0.54 (Debian GNU/Linux)
mod_python/3.1.3 Python/2.3.5 mod_ssl/2.0.54 OpenSSL/0.9.7e configured
-- resuming normal operations
[Wed Feb 15 13:20:36 2006] [error] server reached MaxClients setting,
consider raising the MaxClients setting
[Wed Feb 15 14:04:49 2006] [notice] Graceful restart requested, doing
restart
[Wed Feb 15 14:04:53 2006] [warn] NameVirtualHost *:0 has no
VirtualHosts
[Wed Feb 15 14:04:53 2006] [notice] mod_python: Creating 20 session
mutexes based on 20 max processes and 0 max threads.
[Wed Feb 15 14:04:54 2006] [notice] Apache/2.0.54 (Debian GNU/Linux)
mod_python/3.1.3 Python/2.3.5 mod_ssl/2.0.54 OpenSSL/0.9.7e configured
-- resuming normal operations
[Wed Feb 15 14:31:24 2006] [notice] Graceful restart requested, doing
restart
[Wed Feb 15 14:31:28 2006] [warn] NameVirtualHost *:0 has no
VirtualHosts
[Wed Feb 15 14:31:28 2006] [notice] mod_python: Creating 20 session
mutexes based on 20 max processes and 0 max threads.
[Wed Feb 15 14:31:29 2006] [notice] Apache/2.0.54 (Debian GNU/Linux)
mod_python/3.1.3 Python/2.3.5 mod_ssl/2.0.54 OpenSSL/0.9.7e configured
-- resuming normal operations
[Wed Feb 15 15:42:44 2006] [notice] Graceful restart requested, doing
restart
[Wed Feb 15 15:42:48 2006] [warn] NameVirtualHost *:0 has no
VirtualHosts
[Wed Feb 15 15:42:48 2006] [notice] mod_python: Creating 20 session
mutexes based on 20 max processes and 0 max threads.
[Wed Feb 15 15:42:48 2006] [notice] Apache/2.0.54 (Debian GNU/Linux)
mod_python/3.1.3 Python/2.3.5 mod_ssl/2.0.54 OpenSSL/0.9.7e configured
-- resuming normal operations
[Wed Feb 15 15:50:09 2006] [notice] Graceful restart requested, doing
restart
[Wed Feb 15 15:50:10 2006] [warn] NameVirtualHost *:0 has no
VirtualHosts
[Wed Feb 15 15:50:11 2006] [notice] mod_python: Creating 20 session
mutexes based on 20 max processes and 0 max threads.
[Wed Feb 15 15:50:11 2006] [notice] Apache/2.0.54 (Debian GNU/Linux)
mod_python/3.1.3 Python/2.3.5 mod_ssl/2.0.54 OpenSSL/0.9.7e configured
-- resuming normal operations
[Wed Feb 15 15:59:59 2006] [notice] Graceful restart requested, doing
restart
[Wed Feb 15 16:00:00 2006] [warn] NameVirtualHost *:0 has no
VirtualHosts
[Wed Feb 15 16:00:00 2006] [notice] mod_python: Creating 20 session
mutexes based on 20 max processes and 0 max threads.
[Wed Feb 15 16:00:01 2006] [notice] Apache/2.0.54 (Debian GNU/Linux)
mod_python/3.1.3 Python/2.3.5 mod_ssl/2.0.54 OpenSSL/0.9.7e configured
-- resuming normal operations
[Wed Feb 15 16:05:49 2006] [notice] Graceful restart requested, doing
restart
[Wed Feb 15 16:05:53 2006] [warn] NameVirtualHost *:0 has no
VirtualHosts
[Wed Feb 15 16:05:53 2006] [notice] mod_python: Creating 20 session
mutexes based on 20 max processes and 0 max threads.
[Wed Feb 15 16:05:53 2006] [notice] Apache/2.0.54 (Debian GNU/Linux)
mod_python/3.1.3 Python/2.3.5 mod_ssl/2.0.54 OpenSSL/0.9.7e configured
-- resuming normal operations
[Wed Feb 15 16:25:42 2006] [notice] Graceful restart requested, doing
restart
[Wed Feb 15 16:25:42 2006] [warn] NameVirtualHost *:0 has no
VirtualHosts
[Wed Feb 15 16:25:42 2006] [notice] mod_python: Creating 20 session
mutexes based on 20 max processes and 0 max threads.
[Wed Feb 15 16:25:43 2006] [notice] Apache/2.0.54 (Debian GNU/Linux)
mod_python/3.1.3 Python/2.3.5 mod_ssl/2.0.54 OpenSSL/0.9.7e configured
-- resuming normal operations

Grateful for may help at all

Sincerely



From user at example.net  Sat Feb  4 13:58:10 2006
From: user at example.net (pyluke)
Date: Sat, 04 Feb 2006 18:58:10 GMT
Subject: re.search slashes
In-Reply-To: <43e4f066$1@nntp0.pdx.net>
References: <Yj4Ff.746690$x96.167598@attbi_s72> <43e4f066$1@nntp0.pdx.net>
Message-ID: <6P6Ff.754501$_o.451742@attbi_s71>

Scott David Daniels wrote:
> pyluke wrote:
>> I'm parsing LaTeX document and want to find lines with equations 
>> blocked by "\[" and "\]", but not other instances of "\[" like "a & b 
>> & c \\[5pt]"
>> so, in short, I was to match "\[" but not "\\]" ....  I've tried:
>> check_eq = re.compile('(?!\%\s*)\\\\\[')
>  > check_eq.search(line)
>  > this works in finding the "\[" but also the "\\["
> 
> If you are parsing with regular expressions, you are running a marathon.
> If you are doing regular expressions without raw strings, you are running
> a marathon barefoot.
> 
> Notice:  len('(?!\%\s*)\\\\\[') == 13
>          len(r'(?!\%\s*)\\\\\[') == 15
> 
>> so I would think this would work
>> check_eq = re.compile('(?![\%\s*\\\\])\\\\\[')
>> check_eq.search(line)
>>
>> but it doesn't.  Any tips?
> Give us examples that should work and that should not (test cases),
> and the proper results of those tests.  Don't make people trying to
> help you guess about anything you know.
> 
> --Scott David Daniels
> scott.daniels at acm.org

Alright, I'll try to clarify.  I'm taking a tex file and modifying some 
of the content.  I want to be able to identify a block like the following:

\[
   \nabla \cdot u = 0
\]


I don't want to find the following

\begin{tabular}{c c}
   a & b \\[4pt]
   1 & 2 \\[3pt]
\end{tabular}


When I search a line for the first block by looking for "\[", I find it. 
  The problem is, that this also find the second block due to the "\\[".

I'm not sure what you mean by running a marathon.  I do follow your 
statement on raw strings, but that doesn't seem to be the problem.  The 
difference in your length example above is just from the two escaped 
slashes...   not sure what my point is...

Thanks
Lou


From john_zenger at yahoo.com  Thu Feb  9 07:32:45 2006
From: john_zenger at yahoo.com (John Zenger)
Date: Thu, 09 Feb 2006 07:32:45 -0500
Subject: line wrapping problem
In-Reply-To: <1139484488.037165.106170@g43g2000cwa.googlegroups.com>
References: <1139484488.037165.106170@g43g2000cwa.googlegroups.com>
Message-ID: <z6udnY0CsbDtq3beRVn-ig@comcast.com>

S Borg wrote:

>  print >> mytextfile, '\n'      #new line

Wouldn't this print two line breaks--the one you specify in the string, 
plus the one always added by print if there is no comma at the end of 
the statement?


From workbee at gmail.com  Tue Feb 21 15:39:01 2006
From: workbee at gmail.com (Enigma Curry)
Date: 21 Feb 2006 12:39:01 -0800
Subject: In need of a virtual filesystem / archive
In-Reply-To: <mailman.2224.1140525920.27775.python-list@python.org>
References: <1140489584.412886.201420@g47g2000cwa.googlegroups.com>
	<mailman.2224.1140525920.27775.python-list@python.org>
Message-ID: <1140554341.046892.227800@f14g2000cwb.googlegroups.com>

Thanks for all the suggestions!

I realized a few minutes after I posted that a database would work.. I
just wasn't in that "mode" of thinking when I posted.

PyTables also looks very interesting, especially because apparently I
can read a file in the archive like a normal python file, ie one line
at a time.

Could I do the same using SQL? I'm assuming I would get the whole file
back when I did my SELECT statement. I guess I could chunk the file out
and store it in multiple rows, but that sounds complicated.



From dausha at gmail.com  Wed Feb  8 08:44:40 2006
From: dausha at gmail.com (Ben Wilson)
Date: 8 Feb 2006 05:44:40 -0800
Subject: Another try at Python's selfishness
In-Reply-To: <1138967950.697932.213160@g49g2000cwa.googlegroups.com>
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<GrGdnYYzsbcBLH_eRVn-iQ@comcast.com>
	<mailman.1372.1138945618.27775.python-list@python.org>
	<1138967950.697932.213160@g49g2000cwa.googlegroups.com>
Message-ID: <1139406280.895957.237960@g14g2000cwa.googlegroups.com>

"But the point is, the current situation is not newbie-friendly (I can
tell, I am a newbie)"

I will agree to that, as I consider myself still new. _But_, it's a
stumbling stone only briefly. Get enough nagging error messages, and
you learn and move on. I agree with the grandparent poster that it is a
perfect self-documenting thing, as the use of 'self' is pretty obvious.
For a language that one can learn in a short time, this is a tempest in
a teacup.

I'm just trying to disown my several years of Perl. I like PHP too much
and have no experience with Python in a CGI environment. So, I'm a
little bit confused linguistically. ;-)



From chrism at plope.com  Fri Feb 10 01:28:23 2006
From: chrism at plope.com (Chris McDonough)
Date: Fri, 10 Feb 2006 01:28:23 -0500
Subject: Parsing XML scheme (xsd) to python objects
In-Reply-To: <1139492208.509376.315050@z14g2000cwz.googlegroups.com>
References: <1139492208.509376.315050@z14g2000cwz.googlegroups.com>
Message-ID: <43EC3287.6000007@plope.com>

You don't just want to parse the XSD data because there lots of XML 
parsers for Python.  You want to validate documents against the schema, 
right?  I haven't yet seen a good XML schema validator for Python. 
libxml2 has good bindings for validating XML against RelaxNG schemas.

- C

Bizarro-02 wrote:
> I have a XML scheme (xsd) from which I have created with xjc  (a java
> binding compiler (JAXB)) my java objects with all the get and set
> methods. Now I have to use this scheme and do the same in python but I
> can't find a tool which can read the scheme. I already tried
> generateDS.py but it couldn't parse the data.
> 
> Does anyone know a tool which compiles my scheme and creates an object
> library in python?
> 
> 
> Regards,
> Matthias
> 


From http  Mon Feb 27 03:43:45 2006
From: http (Paul Rubin)
Date: 27 Feb 2006 00:43:45 -0800
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>
	<4402AB7F.7070804@REMOVEMEcyber.com.au>
Message-ID: <7xzmkdxkce.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVEMEcyber.com.au> writes:
Steven D'Aprano <steve at REMOVEMEcyber.com.au> writes:
> What is an empty enum? 

An empty enum is an enum with no identifiers, just like an empty list
is a list with no elements.

> How and when would you use it?

> The best I can come up with is that an empty enum would be the
> enumerated values you have when you don't actually have any enumerated
> values. This is not to be confused with an empty list: an empty list
> is a well-defined concept. It is just a list (a container) with
> nothing in it. A list of X is like a box containing X, and like boxes,
> an empty list (or set, or dict) is meaningful. An enum of X is just
> the Xs themselves. If there is no X, there is nothing there.

An enum X is a datatype and if the enum is empty then there are no
values for that type.  There's nothing wrong with that.

    def print_members(header, e):  # print header, then members of enum e
      print header
      for m in e:
        print '\t', str(m)

    months_longer_than_february = enum('jan', 'mar', 'apr', ) # etc
    months_shorter_than_february = enum()

    print_members('shorter:', months_shorter_than_february)
    print_members('longer:', months_longer_than_february)

should do the obvious thing.

Hmm, I also see the PEP doesn't specify what's supposed to happen with

  Weekdays = enum('sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat')
  Solar_system = enum('sun', 'mercury', 'venus', 'earth',)  # etc.
  print Weekdays.sun == Solar_system.sun

so that's another shortcoming with the PEP. 

> But if you have a good usage case for an empty enum, please feel free
> to tell us.

Do you have a good usage case for the number
647574296340241173406516439806634217274336603815968998799147348150763731 ?

If not, maybe we should modify Python so that all arithmetic operations
throw exceptions if they ever encounter that number.  It's unlikely to
ever happen (that number came from os.urandom).  

The issue is that Python operations should work uniformly on all values
that make sense.  Set operations should work on the empty set.  Addition
should work on zero.   Enums with no members are similarly perfectly valid
and should work.  Kernighan and Plauger in "Software Tools" explained it,
"Make sure your code 'does nothing' gracefully".


From tdelaney at avaya.com  Mon Feb 13 00:02:25 2006
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Mon, 13 Feb 2006 16:02:25 +1100
Subject: ordered sets operations on lists..
Message-ID: <2773CAC687FD5F4689F526998C7E4E5F074346@au3010avexu1.global.avaya.com>

Steve Holden wrote:

> The basic answer is that so far no developer has felt it worthwhile to
> expend time on adding these optimizations.

Mainly because it's rare to find such constructs in anything except
contrived examples ... Nearly every time you use a literal, it's being
added to (subtracted from, etc) a non-literal.

Adding such optimisations to Python may improve it's benchmark scores,
but that's about it. The real gains are to be found in reducing function
call overhead, attribute access, etc - and as a result there has been
considerable effort expended in those areas.

FWIW, there are some of us who do occasionally do bytecode
optimisations, but we know it's just a bit of fun. I've yet to do any
bytecode manipulation that's significantly improved performance. You're
best of leaving such things to Pysco, and concentrating on algorithmic
improvements.

Tim Delaney


From tjreedy at udel.edu  Sat Feb 25 12:57:44 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 25 Feb 2006 12:57:44 -0500
Subject: Is Python a Zen language?
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
Message-ID: <dtq5ql$44m$1@sea.gmane.org>


"John Coleman" <jcoleman at franciscan.edu> wrote in message 
news:1140876556.080086.252390 at e56g2000cwe.googlegroups.com...

an interesting statement and question.
...
> So (assuming my classification makes sense)  which is Python? The
> emphasis on simplicity and the beginner-friendly nature of it seems to
> put it in the tool category. On the other hand, the emphasis on the ONE
> TRUE WAY to accomplish most tasks and the tendency for participants in
> this newsgroup to criticize one another's code as being "unpythonic"
> seems to move it towards the Zen category.
,,,

An 'emphasis on the ONE TRUE WAY' would not be pythonic ;-)
Sorry you got that misimpression.

For the Zen of Python, type 'import this' at an interactive prompt.
One of the lines is

'There should be one-- and preferably only one --obvious way to do it.'

This is intentionally more nuanced, and practical, than your paraphrase.

I agree with the 'both' answer.

Terry Jan Reedy





From lycka at carmen.se  Wed Feb  8 05:47:45 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 08 Feb 2006 11:47:45 +0100
Subject: Question about idioms for clearing a list
In-Reply-To: <mailman.1568.1139350103.27775.python-list@python.org>
References: <mailman.1294.1138727665.27775.python-list@python.org>	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>	<mailman.1489.1139232969.27775.python-list@python.org>	<pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au>	<ds83kd$98m$1@sea.gmane.org>	<mailman.1510.1139250471.27775.python-list@python.org>	<43E7F59B.9070009@REMOVEMEcyber.com.au>	<mailman.1537.1139297533.27775.python-list@python.org>	<E78Gf.22893$Jd.14515@newssvr25.news.prodigy.net>	<dsb3lq$shu$1@sea.gmane.org>
	<mailman.1568.1139350103.27775.python-list@python.org>
Message-ID: <dsci8h$lkl$1@wake.carmen.se>

Ed Singleton wrote:
> Is it obvious to a newbie what the difference between mappings and
> "not-mappings", and is it obvious exactly what is and isn't a mapping?
> 
> Should it be necessary to "know" python before it becomes easy to use?

QOTW! (You are joking, aren't you? :)

I can undestand how people can turn a bit defensive when some
people who are more skilled in programming than in diplomacy
basically tells the confused that they are ignorant and should
just learn the language.

On the other hand, I think that Art Siegel said it very well:
"My ability to grok Python to any extent, from that starting point,
was based on an understanding that it was my responsibility to come
to Python, not it to me."
(Actually, that's a much better QOTW! It gives me flashbacks from
a book I once read, http://www.amazon.com/gp/product/0060958324 )

There are just a few statements in Python. Some of them should
really have been functions (print and exec) but anyway, they are
still few enough to learn. There are also a few ways to get inside
composite objects, x.y, x[y], x[y:z]. These things are among the
most fundamental in Python.

If luminaries like Fredrik Lundh and Raymond Hettiger tells you
that things should be done in a certain way, it's really just
silly to argue further. I've programmed Python since 1996, but if
these guys tell me I'm wrong, I won't bother to argue. If I don't
understand their position, I'll try to study the subject further,
and I might ask them to clarify, but I'll assume that they are
right. That assumption has worked so far for me.

There are warts and quirks in Python, everybody will agree to that,
but Python is *not* Perl. A basic motto has always been to avoid
synonyms, to try to provide as few ways to do one thing, rather
than to provide as many ways, as possible. This has proven very
successful in making Python easy to learn and use. The opposite
approach has made Perl into the favourite programimng language
among people who think that "if the program was difficult to write,
it should be difficult to read as well!"

When you can't transfer one approach from one type to another,
there is a reason for that. A few times it might be due to some
obscure practical aspect of the implementation, but most of the
time, it's completely intentional, and finding these aspects of
Python, learning why they are the way they are, and embracing the
language rather than trying to fight it, is actually very rewarding.

Tuples aren't just immutable lists--they have different purposes
beyond that. Ordereded and unordered collections are conceptually
different. Neither call-by-referece nor call-by-value describes
parameter passing in Python well, the clue lies in understanding
how assignments and objects work, and you need to understand the
difference between mutable and immutable objects etc. There are
a number of fundamental concepts that you need to understand to
really use Python well.

Python works very smoothly, and you can do a lot of productive
work with it even if you don't know these things, but in time
you'll trip over them, and as you do, you need to grok these
concepts to get further. Asking for some syntactic change or
some convenience method so that you can get a little further
without understanding the fundamental concept isn't the way to
get beyond these little stumbling blocks.

It's a bit as if you call the design department of your car
manufacturer and tell them how they should redesign the suspension
since it was so bumpy when you drove around with flat tires.
Saying that it's too much to ask that you keep the tires filled
with the right amount of air won't meet much sympathy.


From aleaxit at yahoo.com  Fri Feb  3 23:28:41 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Fri, 3 Feb 2006 20:28:41 -0800
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<drvd56$nb3$1@wake.carmen.se>
	<mailman.1396.1138998527.27775.python-list@python.org>
Message-ID: <1ha7a4j.lo16w31ikslorN%aleaxit@yahoo.com>

Terry Reedy <tjreedy at udel.edu> wrote:
   ...
> As was once pointed out to me some years ago, when I wrote something 
> similar, a.f() is not just a shortcut for A.f(a) [a.__class__.f(a)].   The
> latter only looks for f in the class A namespace while the former also
> looks in superclass namespaces.

Nope:

>>> class B:
...   def f(self): print 'b.f'
... 
>>> class A(B): pass
... 
>>> a=A()
>>> a.__class__.f(a)
b.f
>>>

Inheritance applies in any lookup of an attribute in a class, just as
well as on an instance of the class.

Alex


From aahz at pythoncraft.com  Thu Feb  2 18:38:28 2006
From: aahz at pythoncraft.com (Aahz)
Date: 2 Feb 2006 15:38:28 -0800
Subject: beta.python.org content
References: <mailman.1094.1138298277.27775.python-list@python.org>
	<1138327774.584797.161990@g43g2000cwa.googlegroups.com>
	<1138378138.080416.140450@g14g2000cwa.googlegroups.com>
	<auCdnc2ES8nP9EfeRVn-tQ@speakeasy.net>
Message-ID: <dru55k$5le$1@panix2.panix.com>

In article <auCdnc2ES8nP9EfeRVn-tQ at speakeasy.net>,
A.M. Kuchling <amk at amk.ca> wrote:
>On 27 Jan 2006 08:08:58 -0800, 
>	Michael Tobis <mtobis at gmail.com> wrote:
>>
>> What about some permutation of the PyCon logo? It is really quite
>> brilliant.
>>
>> http://www.python.org/pycon/2006/logo.png
>> 
>> Kudos to whoever came up with that, by the way!
>
>It was Michael Bernstein who designed it, I believe, and agree that
>it's a great logo for PyCon.

Correct.  Also known as my cousin.  He did the logo for my me and my
primary:

http://www.cat-and-dragon.com/

Anyone wanting the services of a good graphic/web designer should
definitely consider him!

</blatant plug>
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"19. A language that doesn't affect the way you think about programming,
is not worth knowing."  --Alan Perlis


From singletoned at gmail.com  Tue Feb  7 09:08:56 2006
From: singletoned at gmail.com (Ed Singleton)
Date: Tue, 7 Feb 2006 14:08:56 +0000
Subject: Question about idioms for clearing a list
In-Reply-To: <1139306562.105655.23200@f14g2000cwb.googlegroups.com>
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<ds83kd$98m$1@sea.gmane.org> <43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>
	<1139306562.105655.23200@f14g2000cwb.googlegroups.com>
Message-ID: <34bb7f5b0602070608u5eb184dbt@mail.gmail.com>

On 7 Feb 2006 02:02:42 -0800, Ben Sizer <kylotan at gmail.com> wrote:
> > Fred is exactly correct.  Slicing is absolutely basic to Python.
> > Accordingly, it gets covered right at the beginning of the tutorial
> > (section 3.1).
>
> Yes, right after UTF encoding details, complex numbers, and various
> mentions of shell scripts.

Now that is GPotD (Good Point of the Day) which is much better than
QotW as it's actually useful.

> I don't want to criticise the hard work that
> went into making the tutorial but let's not pretend it's the epitome of
> documentation or even necessary the most obvious reference for users.
>
> > Likewise, the del keyword is fundamental -- if you
> > can't get, set, and del, then you need to go back to collections
> > school.
>
> I have hardly used the del keyword in several years of coding in
> Python. Why should it magically spring to mind in this occasion?
> Similarly I hardly ever find myself using slices, never mind in a
> mutable context.
>
> del L[:] is not obvious, especially given the existence of clear() in
> dictionaries. I'm not necessarily requesting a clear() method, but I am
> requesting a little more understanding towards those who expected one.
> The list interface is full of redundant convenience methods, so one
> more would hardly be a surprise or an unreasonable thing for people to
> expect. Again we unfortunately have a bit of an attitude problem
> towards anyone posting here that doesn't know whatever the experts
> think is obvious.

I agree wholeheartedly with this, particularly as there often seems to
be strong (and confusing) resistance to making Python easier and more
obvious.  I can only assume that it is by people who have forgotten
what it is like to be an average programmer.  (Paul Graham constantly
makes the same mistake when he goes on about how everyone should use
lisp).

Ed


From mark at holmes.nl  Fri Feb 17 04:46:56 2006
From: mark at holmes.nl (wscrsurfdude)
Date: 17 Feb 2006 01:46:56 -0800
Subject: file.read problem
In-Reply-To: <1140168071.085338.132630@o13g2000cwo.googlegroups.com>
References: <1140158220.388409.87650@g47g2000cwa.googlegroups.com>
	<1140159632.758960.318580@g44g2000cwa.googlegroups.com>
	<mailman.2041.1140166701.27775.python-list@python.org>
	<1140168071.085338.132630@o13g2000cwo.googlegroups.com>
Message-ID: <1140169616.908270.294910@g14g2000cwa.googlegroups.com>

I have the solution, the flaw was not in the opening of the file, but
in the writing of the file. Stupid me, i opened it with mode rb, but
wrote it with w instead of with wb

Everybody thanks for helping me.



From carsten at uniqsys.com  Fri Feb 24 08:34:44 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 24 Feb 2006 08:34:44 -0500
Subject: problem(s) with import from parent dir: "from ../brave.py
	import sir_robin"
In-Reply-To: <1140786637.451247.16210@e56g2000cwe.googlegroups.com>
References: <1140786637.451247.16210@e56g2000cwe.googlegroups.com>
Message-ID: <1140788084.19750.16.camel@dot.uniqsys.com>

On Fri, 2006-02-24 at 08:10, per9000 wrote:
> Dear Black Knight,
> 
> I have no quarrel with you sir Knight, but I must import your parents.
> 
> 
> SHORT VERSION:
> 
> I tried three variants of "from ../brave.py import sir_robin", one
> works. I want to use it in a py-file to execute command-line-style and
> that does not work.
> 
> Can someone please give me, not a bucket with the desert(s) on top, but
> just the thin chocolate?

1) Read and understand
http://docs.python.org/tut/node8.html#SECTION008110000000000000000
2) insert something that prints sys.path at the beginning of your script
and run the script command-line-style.
3) print sys.path in an interactive session
4) note the difference in output from steps 2 and 3

This should explain why you're getting different behavior between
running your script from the command line and running it line-by-line in
a python interpreter session. It should also give you a hint as to how
to solve your problem.

-Carsten



From dbough77 at yahoo.com  Mon Feb 20 19:26:15 2006
From: dbough77 at yahoo.com (DannyB)
Date: 20 Feb 2006 16:26:15 -0800
Subject: 2.4.2 + Zone Alarm
Message-ID: <1140481575.506191.9980@g47g2000cwa.googlegroups.com>

I believe this issue is known - I haven't found a way around it.

ZoneAlarm seems to be stopping IDLE from running.
I get two errors:

"Socket Error:  Connection refused"
and
"IDLE's subprocess didn'tt make connection.  Either IDLE can't start a
subprocess or personal firewall software is blocking the connection."

I know they are both due to ZA - I've set up ZA to allow Python to
access the internet w/o prompting me (even though I now it doesn't
actually access the internet.)

This usually happens after I create a script and run it in the GUI - if
the script ends up being a never ending loop - I X out of IDLE to stop
it.  The next time I try to run a script I get the errors until I
reboot the computer.

IIs there a fix?  I'm pretty sure that this problem started with 2.3.1
(i'm suing 2.4.2).

Thanks

Dan



From max.muxe at maxxly.de  Wed Feb 22 17:23:58 2006
From: max.muxe at maxxly.de (Max Muxe)
Date: Wed, 22 Feb 2006 23:23:58 +0100
Subject: [Python-de] PyUNO with different Python
In-Reply-To: <43FC85CB.3060102@gmx.net>
References: <43FC85CB.3060102@gmx.net>
Message-ID: <1140647038.9275.4.camel@ubuntu>

Am Mittwoch, den 22.02.2006, 16:39 +0100 schrieb Katja S?ss:
> Hi!
> maybe somebody can give me an hint to my problem setting up PyUNO on my 
> Mac to work with my Python not the Python delivered with OpenOffice.
> As said in installation instructions I've set
>    OPENOFFICE_PATH="/usr/lib/openoffice/program"
>    export PYTHONPATH="$OPENOFFICE_PATH"
>    export LD_LIBRARY_PATH="$OPENOFFICE_PATH"
> according to my environment.
> 
Mal eine vieleicht bl?de Frage: Warum schreibst Du hier nicht deutsch?

[...]

Grusz aus der Enklave



From fakeaddress at nowhere.org  Wed Feb 15 21:29:08 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Thu, 16 Feb 2006 02:29:08 GMT
Subject: %SystemDrive%
In-Reply-To: <dsvv5j$4dm$1@solaris.cc.vt.edu>
References: <dsvt14$rev$1@solaris.cc.vt.edu> <43F37BDE.9020505@activestate.com>
	<mailman.1965.1140031059.27775.python-list@python.org>
	<dsvv5j$4dm$1@solaris.cc.vt.edu>
Message-ID: <UrRIf.6602$rL5.1340@newssvr27.news.prodigy.net>

rtilley wrote:
> Carsten Haese wrote:
> 
>> Is there a reason why os.environ['SYSTEMDRIVE'] shouldn't work?
> 
> I didn't know it was in os! It returns C: instead of C:\ like my method. 
> Other than that, it seems to do the trick.

To get it with the \, you might use:

     os.path.abspath(os.environ['SYSTEMDRIVE'])


-- 
--Bryan


From lormayna at gmail.com  Sun Feb 12 06:01:45 2006
From: lormayna at gmail.com (Zarathustra)
Date: 12 Feb 2006 03:01:45 -0800
Subject: Pyserial handobook
In-Reply-To: <mailman.1769.1139705022.27775.python-list@python.org>
References: <1139655808.197478.64160@g43g2000cwa.googlegroups.com>
	<11urs1b5gl93e1c@corp.supernews.com>
	<1139704128.708641.315670@g44g2000cwa.googlegroups.com>
	<mailman.1769.1139705022.27775.python-list@python.org>
Message-ID: <1139742105.442336.146020@z14g2000cwz.googlegroups.com>

Maybe I does not see very well, I'm sorry, but at my ome I have only
the dial up connection :-)))
Thank you very much for the help



From battlefieldplayer at hotmail.com  Thu Feb  9 07:31:33 2006
From: battlefieldplayer at hotmail.com (Bennie Tilma)
Date: Thu, 09 Feb 2006 13:31:33 +0100
Subject: problems opening IDLE
Message-ID: <BAY111-F3268F69F7DA7E2A6B2C0CDB4030@phx.gbl>

I'm having trouble with opening the IDLE and running programs. Every time I 
try to open it, it says:
1. Socket error: Connection refused
2. IDLE's subprocess didn't make connection. Either IDLE can't start a 
subprocess or personal firewall software is blocking the connection.

Point is, I allready entered python as an exception to my firewall and when 
I disable it, the messages keep apearing. Can anyone help?

Bennie Tilma

_________________________________________________________________
Een audiogesprek? Pak Messenger, niet de telefoon 
http://www1.imagine-msn.com/Messenger/Video.aspx



From kent at kentsjohnson.com  Mon Feb 27 14:43:47 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Mon, 27 Feb 2006 14:43:47 -0500
Subject: different ways to strip strings
In-Reply-To: <dtvgd4$ci7$1@solaris.cc.vt.edu>
References: <dtvgd4$ci7$1@solaris.cc.vt.edu>
Message-ID: <440351d4$1_3@newspeer2.tds.net>

rtilley wrote:
> s = ' qazwsx '
> 
> # How are these different?
> print s.strip()
> print str.strip(s)

They are equivalent ways of calling the same method of a str object.
> 
> Do string objects all have the attribute strip()? If so, why is 
> str.strip() needed? Really, I'm just curious... there's a lot  don't 
> fully understand :)

Actually strip is an attibute of the str class. This is generally true - 
methods are class attributes.

When you look up an attribute on an instance, if the instance does not 
have the attribute, it is looked up on the class. In the case of 
methods, there is some magic that converts the attribute to a 'bound 
method' - an object that wraps the method and the instance. When you 
call the bound method, the actual method is passed the instance (as the 
self parameter) plus whatever other arguments you have given it.

For example, here is a simple class with a single method:

  >>> class spam(object):
  ...   def ham(self, eggs):
  ...     print eggs
  ...

Here is a normal method call:
  >>> s=spam()
  >>> s.ham('Ha!')
Ha!

What may not be immediately apparent is that s.ham('Ha!') is two 
separate operations. First is the attribute lookup of s.ham, which 
returns the bound method:
  >>> s.ham
<bound method spam.ham of <__main__.spam object at 0x00A36D50>>

Second is the actual call of the bound method, which forwards to the 
function defined in the class definition:
  >>> f = s.ham
  >>> f('Ha!')
Ha!


But that's only half the story. Since ham is a class attribute, it can 
be looked up on the class directly. Since there is no instance 
associated with the lookup, the result is an 'unbound method' object:

  >>> spam.ham
<unbound method spam.ham>

To call this method, you have to provide the instance as the first argument:
  >>> f=spam.ham
  >>> f(s, 'Ha!')
Ha!

So...
s.strip() gets a bound method object from the class and calls it with no 
additional argument.
str.strip(s) gets an unbound method object from the class and calls it, 
passing a class instance as the first argument.

Kent


From noway at sorry.com  Mon Feb 27 01:15:12 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Mon, 27 Feb 2006 06:15:12 GMT
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
Message-ID: <QNwMf.9926$PR2.201584@twister2.libero.it>

Ben Finney wrote:

> Values within an enumeration cannot be meaningfully compared except
> with values from the same enumeration.  The comparison operation
> functions return ``NotImplemented`` [#CMP-NOTIMPLEMENTED]_ when a
> value from an enumeration is compared against any value not from the
> same enumeration or of a different type::
> [...]
> This allows the operation to succeed, evaluating to a boolean value::

Given that this is going to change in Python 3.0 for builtin types, I'm not
sure there's much reason to keep it this way. I'd rather a comparison operation
between different enum types to raise an exception. This would be a very
compelling feature to use enum (and in fact, the implementation I chose in
Cookbook for my programs have this feature).

> Coercing a value from an enumeration to a ``str`` results in the
> string that was specified for that value when constructing the
> enumeration::
>
>     >>> gym_night = Weekdays.wed
>     >>> str(gym_night)
>     'wed'

What's the repr of an enumeration value? OTOH, it should be something like
"Weekdays.wed", so that eval(repr()) holds true. Also, it'd be very useful in
debug dumps, tracebacks and whatnot.
-- 
Giovanni Bajo




From mooquack at suad.org  Sat Feb 18 20:24:50 2006
From: mooquack at suad.org (Kirk McDonald)
Date: Sat, 18 Feb 2006 17:24:50 -0800
Subject: 2-dimensional data structures
In-Reply-To: <45pk2dF7o7egU1@individual.net>
References: <43ss7mF1n4eg5U1@individual.net>
	<mailman.1110.1138311076.27775.python-list@python.org>
	<45pk2dF7o7egU1@individual.net>
Message-ID: <43f7c777$1@nntp0.pdx.net>

anthonyberet wrote:
> Thanks for the advice (to everyone in the thread).
> I think I will go with nested lists.
> However, I am running into a conceptual problem.
> My approach will be firstly to remove all the impossible digits for a 
> square by searching the row and column for other occurances.
> 
> However, I wondering how to approach the search of the nine regions of 
> the grid. I am thinking of producing another nested list, again 9x9 to 
> store the contents of each region, and to update this after each pass 
> through -and update of- the main grid (row and column).
> 
> I am not sure how to most efficiently identify which region any given 
> square on the grid is actually in - any thoughts, for those that have 
> done this? - I don't want a massive list of IF conditionals if I can 
> avoid it.
> 

When I wrote my Sudoku solver (a terribly inefficient and naive 
recursive algorithm that I originally wrote in C++ and was the first 
thing I ever wrote in Python), I used numarray. It allows 
two-dimensional slicing:

def inBlock(x, y, val):
     blockX = x/size * size
     blockY = y/size * size

     return val in sudoku[blockX:blockX+size, blockY:blockY+size]

'size' in this example is a global variable equal to the size of the 
puzzle, so 3 for a normal puzzle. 'sudoku' is a global two-dimensional 
array simply holding the values in the puzzle.

(There are any number of things in this can be improved, such as using 
the // floor division operator rather than /, not using global 
variables, and so on. What can I say? It was a straight conversion from 
C++. I hardly knew what "Pythonic" meant.)

-Kirk McDonald


From apardon at forel.vub.ac.be  Wed Feb  8 09:32:12 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 8 Feb 2006 14:32:12 GMT
Subject: module with __call__ defined is not callable?
References: <mailman.1580.1139367500.27775.python-list@python.org>
	<pan.2006.02.08.10.21.24.46790@REMOVETHIScyber.com.au>
	<1139394463.255902.168960@f14g2000cwb.googlegroups.com>
	<mailman.1591.1139400885.27775.python-list@python.org>
Message-ID: <slrnduk07b.117.apardon@rcpc42.vub.ac.be>

Op 2006-02-08, Steve Holden schreef <steve at holdenweb.com>:
>
> Why should a module be callable? What's the advantage? Should we be able 
> to add two modules together, yielding a module that contains all the 
> code of both modules? What happens if I multiply a module by two - 
> presumably the result should be the same as adding a module to itself? 
> Perhaps we should be able to divide a module by a function?
>
> The pursuit of orthogonality, while admirable, can lead to insanity if 
> pushed too far.

This is not an argument. This doesn't give a clue about where to stop
this pursuit en when to go on.

Whether it is usefull to call modules add them or multiply them by two
is up to the person producing the code. That is no different than when
he decides it is usefull to call certain objects, add them or multiply
them by two.

I can understand there are implemenation details that make it not
worth while to implement this. But otherwise I would think it
a bad reason to give up orthogonality just because one can't imagine
what it could be usefull for.

-- 
Antoon Pardon


From spwpreston at gmail.com  Fri Feb 10 21:14:46 2006
From: spwpreston at gmail.com (S Borg)
Date: 10 Feb 2006 18:14:46 -0800
Subject: absolute removal of '\n' and the like
In-Reply-To: <pan.2006.02.11.00.31.07.559200@REMOVETHIScyber.com.au>
References: <1139613718.688010.216370@z14g2000cwz.googlegroups.com>
	<pan.2006.02.11.00.31.07.559200@REMOVETHIScyber.com.au>
Message-ID: <1139624086.475503.72790@g44g2000cwa.googlegroups.com>

Steven,

 Thank you very much for your insights. They are quite helpful.

S



From python at rcn.com  Wed Feb 22 15:47:55 2006
From: python at rcn.com (Raymond Hettinger)
Date: 22 Feb 2006 12:47:55 -0800
Subject: list assignment
References: <11vpi2gdcbccbf6@corp.supernews.com>
Message-ID: <1140641275.840358.292790@o13g2000cwo.googlegroups.com>

>      [spam, ham] = ['yum', 'YUM']
>
> I don't see how this is any different than a tuple unpacking assignment:
>
>      >>> a, b = 1, 2

It's not different.  They are ways of writing the same thing.


Raymond Hettinger



From davidworley at gmail.com  Sun Feb  5 13:22:05 2006
From: davidworley at gmail.com (Dave)
Date: 5 Feb 2006 10:22:05 -0800
Subject: Get System Date?
In-Reply-To: <1139161771.537069.181010@g44g2000cwa.googlegroups.com>
References: <1139161771.537069.181010@g44g2000cwa.googlegroups.com>
Message-ID: <1139163725.058296.232200@z14g2000cwz.googlegroups.com>

Dustan,

Python has a module called, appropriately, "time". Like most things in
Python, it's fairly simple and straightforward to use.

The module is documented here:
http://docs.python.org/lib/module-time.html

Breifly, though, the format you want is built right into time:

>>> import time
>>> now = time.localtime()
>>> print now
(2006, 2, 5, 13, 21, 15, 6, 36, 0)

So to get the year, month, and day you would just have to manipulate
the values returned by time.gmtime().

- Dave



From kent at kentsjohnson.com  Mon Feb 27 16:55:58 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Mon, 27 Feb 2006 16:55:58 -0500
Subject: type = "instance" instead of "dict"
In-Reply-To: <1141072746.685948.251040@j33g2000cwa.googlegroups.com>
References: <1141069989.763239.191140@u72g2000cwu.googlegroups.com>
	<44035966$1_2@newspeer2.tds.net>
	<1141072746.685948.251040@j33g2000cwa.googlegroups.com>
Message-ID: <440370ce$1_2@newspeer2.tds.net>

Cruella DeVille wrote:
> So what you are saying is that my class Dict is a subclass of Dict, and
> user defined dicts does not support iteration?

I don't know what your class Dict is, I was guessing. The built-in is 
dict, not Dict.
> 
> What I'm doing is that I want to write the content of a dictionary to a
> file, and send the dictionary (favDict) as a parameter like this:
> favDict = Dict() <-- my own class (or not?)

Is this actual code or are you typing from memory?

> # put things in favDict (works fine)
> fileToWrite.writeFile(favDict) # AttributeError: Dict instance has no
> attribute 'itervalues'

What version of Python are you using? itervalues() is in Python 2.2 and 
later.

Kent


From rocky at panix.com  Tue Feb 21 19:49:13 2006
From: rocky at panix.com (R. Bernstein)
Date: 21 Feb 2006 19:49:13 -0500
Subject: ANN: Extended Python debugger 0.12
Message-ID: <wih64n81aly.fsf@panix3.panix.com>

This third release of an improved debugger also probably about as
great as the last release.

Download from
http://sourceforge.net/project/showfiles.php?group_id=61395&package_id=175827

On-line documentation is at
http://bashdb.sourceforge.net/pydb/pydb/lib/index.html

Along with this release is a version of ddd (3.3.12-test3) that
interfaces with this debugger. Get that at:
http://sourceforge.net/project/showfiles.php?group_id=61395&package_id=65341

- - - - - - 
>From the NEWS file.

* Add gdb commands: 
    - "cd" command
    - "display", "undisplay"
    - help subcommands for "show", "info", and "set"
    - info: "display", "line" "source" and "program"
    - "pwd" command
    - "return" (early exit from a function)
    - "shell" command
    - Extend "info line" to allow a function name.

* Use inspect module. Argument parameters and values are now shown.

* Break out debugger into more files 

* File location reporting changed. Is now like mdb, bashdb, or (or perldb)

* Changes to make more compatible with ddd.

* Doc fixes, add more GNU Emacs debugger commands

* "clear" command now accepts a function name

* Bugfixes:
  - allow debugged program to mangle sys.argv (we save our own copy)





From neuroinf at yahoo.com  Wed Feb 15 19:33:13 2006
From: neuroinf at yahoo.com (AndrewJ)
Date: 15 Feb 2006 16:33:13 -0800
Subject: urllib, caching
Message-ID: <1140049993.104394.25290@o13g2000cwo.googlegroups.com>

I've got code:

 f= urllib.urlopen("http://www.stuff/nb5.php") ;

This connects to a page that changes in real time. Works ok, and
retrieves the data the first time.

But then any subsequent calls all return the same data, even though the
web page itself has changed.

Is there caching going on here? How do I turn it off ?



From aleaxit at yahoo.com  Mon Feb  6 00:07:23 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 5 Feb 2006 21:07:23 -0800
Subject: Literal Escaped Octets
References: <pan.2006.02.06.04.50.15.325558@hotmail.com>
Message-ID: <1hab1ag.1g7oxkb1pw7a20N%aleaxit@yahoo.com>

Chason Hayes <chasonh at hotmail.com> wrote:
   ...
> easily in c/c++ but I need to do it in python. I am not sure how to read
> and evaluate the binary value of a byte in a long string when it is a non
> printable ascii value in python.

If you have a bytestring (AKA plain string) s, the binary value of its
k-th byte is ord(s[k]).


Alex


From steve at REMOVETHIScyber.com.au  Fri Feb 17 19:49:32 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sat, 18 Feb 2006 11:49:32 +1100
Subject: Another stupid newbie question
References: <1140203709.145048.314180@g43g2000cwa.googlegroups.com>
	<mailman.2065.1140204717.27775.python-list@python.org>
	<1140205868.660418.234980@z14g2000cwz.googlegroups.com>
Message-ID: <pan.2006.02.18.00.49.32.389635@REMOVETHIScyber.com.au>

On Fri, 17 Feb 2006 11:51:08 -0800, Byte wrote:

> Great, thanks all. Now, how come
> 
>         if x == mx: print x
>                     break
> 
> Dosnt work?

Do yourself a HUGE favour and read this before posting any more questions
to comp.lang.python. Trust me, you really will thank us.

http://www.catb.org/~esr/faqs/smart-questions.html


 
-- 
Steven.




From bencvt at gmail.com  Wed Feb 15 10:51:14 2006
From: bencvt at gmail.com (Ben Cartwright)
Date: 15 Feb 2006 07:51:14 -0800
Subject: Self-identifying functions and macro-ish behavior
References: <1139989639.323304.239680@g43g2000cwa.googlegroups.com>
Message-ID: <1140018674.321119.212990@f14g2000cwb.googlegroups.com>

63q2o4i02 at sneakemail.com wrote:
> How do I get some
> sort of macro behavior so I don't have to write the same thing over and
> over again, but which is also not neatly rolled up into a function,
> such as combining the return statements with a printing of <self-name>?


Decorators: http://www.python.org/peps/pep-0318.html


> My application has a bunch of functions that must do different things,
> then print out their names, and then each call another function before
> returning.  I'd like to have the last function call and the return in
> one statement, because if I forget to manually type it in, things get
> messed up.
>
> (ok, I'm writing a parser and I keep track of the call level with a tab
> count, which gets printed before any text messages.  So each text
> message has a tab count in accordance with how far down the parser is.
> Each time a grammar rule is entered or returned from, the tab count
> goes up or down.  If I mess up and forget to call tabsup() or tabsdn(),
> the printing gets messed up.  There are a lot of simple cheesy
> production rules, [I'm doing this largely as an exercise for myself,
> which is why I'm doing this parsing manually], so it's error-prone and
> tedious to type tabsup() each time I enter a function, and tabsdn()
> each time I return from a function, which may be from several different
> flow branches.)


def track(func):
    """Decorator to track calls to a set of functions"""
    def wrapper(*args, **kwargs):
        print " "*track.depth + func.__name__, args, kwargs or ""
        track.depth += 1
        result = func(*args, **kwargs)
        track.depth -= 1
        return result
    return wrapper
track.depth = 0


# Then to apply the decorator to a function, e.g.:
def f(x):
    return True
# Add this line somewhere after the function definition:
f = track(f)

# Alternately, if you're using Python 2.4 or newer, just define f as:
@track
def f(x):
    return True


# Test it:
@track
def fact(n):
    """Factorial of n, n! = n*(n-1)*(n-2)*...*3*2"""
    assert n >= 0
    if n < 2:
        return 1
    return n * fact(n-1)
@track
def comb(n, r):
    """Choose r items from n w/out repetition, n!/(r!*(n-r)!)"""
    assert n >= r
    return fact(n) / fact(r) / fact(n-r)
print comb(5, 3)
# Output:
"""
comb (5, 3)
 fact (5,)
  fact (4,)
   fact (3,)
    fact (2,)
     fact (1,)
 fact (3,)
  fact (2,) 
   fact (1,) 
 fact (2,) 
  fact (1,) 
10
"""

--Ben



From timr at probo.com  Sat Feb 25 02:51:25 2006
From: timr at probo.com (Tim Roberts)
Date: Sat, 25 Feb 2006 07:51:25 GMT
Subject: spaces at ends of filenames or directory names on Win32
References: <dtkuav$keb$1@solaris.cc.vt.edu>
Message-ID: <at200290f0qo1s0pvmj5obbs6f8krk4630@4ax.com>

rtilley <rtilley at vt.edu> wrote:
>
>For example... tell windows to move a file named ' XXX ' (one space 
>before and one space after the filename). Windows will complain that 
>file 'XXX' does not exist. It's correct of course, 'XXX' does not exist, 
>but ' XXX ' does indeed exist.

Are you sure you're doing it right?  It works for me.  Notice that I have
"x.c" and " x.c " in the same directory at the same time.

C:\tmp\x>copy ..\x.c .
        1 file(s) copied.

C:\tmp\x>dir
 Volume in drive C has no label.
 Volume Serial Number is 70CF-E8F4

 Directory of C:\tmp\x

02/24/2006  11:48 PM    <DIR>          .
02/24/2006  11:48 PM    <DIR>          ..
02/22/2006  10:49 PM               539 x.c
               1 File(s)            539 bytes
               2 Dir(s)  50,937,999,360 bytes free

C:\tmp\x>copy x.c " x.c "
        1 file(s) copied.

C:\tmp\x>dir
 Volume in drive C has no label.
 Volume Serial Number is 70CF-E8F4

 Directory of C:\tmp\x

02/24/2006  11:48 PM    <DIR>          .
02/24/2006  11:48 PM    <DIR>          ..
02/22/2006  10:49 PM               539  x.c
02/22/2006  10:49 PM               539 x.c
               2 File(s)          1,078 bytes
               2 Dir(s)  50,937,999,360 bytes free

C:\tmp\x>erase " x.c "

C:\tmp\x>dir
 Volume in drive C has no label.
 Volume Serial Number is 70CF-E8F4

 Directory of C:\tmp\x

02/24/2006  11:49 PM    <DIR>          .
02/24/2006  11:49 PM    <DIR>          ..
02/22/2006  10:49 PM               539 x.c
               1 File(s)            539 bytes
               2 Dir(s)  50,937,999,360 bytes free

C:\tmp\x>
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From xavier.morel at masklinn.net  Wed Feb  8 15:03:47 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Wed, 08 Feb 2006 21:03:47 +0100
Subject: A __getattr__ for class methods?
In-Reply-To: <dsdgaq$s9c$1@aphrodite.grec.isp.9tel.net>
References: <1139421293.213901.5380@f14g2000cwb.googlegroups.com>
	<dsdgaq$s9c$1@aphrodite.grec.isp.9tel.net>
Message-ID: <dsdijm$nmt$1@apollon.grec.isp.9tel.net>

Oh, and I wondered too: is your goal to build an ORM, or do you just 
need an ORM?

Cause if it's the latter then Python does already have some fairly good 
ORMs such as SQLAlchemy or PyDO2, you don't *need* to create yours.


From dickey at saltmine.radix.net  Wed Feb  8 19:03:28 2006
From: dickey at saltmine.radix.net (Thomas Dickey)
Date: Thu, 09 Feb 2006 00:03:28 -0000
Subject: Replacing curses
References: <mailman.1566.1139345769.27775.python-list@python.org>
	<43E9234B.6030108@v.loewis.de>
	<mailman.1588.1139372460.27775.python-list@python.org>
	<11uk55h47lruk18@corp.supernews.com>
	<mailman.1611.1139422272.27775.python-list@python.org>
	<11ukf0ci8d6ac64@corp.supernews.com>
	<mailman.1620.1139429435.27775.python-list@python.org>
Message-ID: <11ul1mgplrah63e@corp.supernews.com>

Ian Ward <ian at excess.org> wrote:
> Grant Edwards wrote:
>> Depending on what you're tring to do, slang might be an option,

> I've looked at newt and snack, but all I really need is:
> - a way to position the cursor at (0,0)
> - a way to hide and show the cursor
> - a way to detect when the terminal is resized
> - a way to query the terminal size

...and send UTF-8 text, keeping track of where you really are on the screen.

-- 
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net


From rajesh1986 at gmail.com  Mon Feb 27 06:26:46 2006
From: rajesh1986 at gmail.com (Rajesh Sathyamoorthy)
Date: Mon, 27 Feb 2006 19:26:46 +0800
Subject: minimize a program into an icon on the taskbar.
Message-ID: <47a726d60602270326i2df525d3sd4a04b74aa447a16@mail.gmail.com>

 Hi,

I would know how to minimize a program (wxpython app) into an icon on the
taskbar on windows (the one at the side near the clock, i can't remember
what is it called.)

Is it easy to be done? Is there a way to do the same thing on Linux?

Thank You.
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From aahz at pythoncraft.com  Tue Feb  7 16:48:35 2006
From: aahz at pythoncraft.com (Aahz)
Date: 7 Feb 2006 13:48:35 -0800
Subject: Question about idioms for clearing a list
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<E78Gf.22893$Jd.14515@newssvr25.news.prodigy.net>
	<mailman.1567.1139348019.27775.python-list@python.org>
Message-ID: <dsb4jj$ho4$1@panix2.panix.com>

In article <mailman.1567.1139348019.27775.python-list at python.org>,
Fredrik Lundh <fredrik at pythonware.com> wrote:
>
>dicts and sets are mappings, and lists are not.  mappings don't
>support slicing.  lists do.
>
>are you sure you know Python ?

Actually, after spending some time thinking about this, I've decided
that sets are *not* mappings.  I believe that a mapping should support
__getitem__(); in addition, sets do not consist of key/value pairs like
any other mapping.

(Just to be clear, I do agree with your basic point; I'm nitpicking on a
tangent.)
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"19. A language that doesn't affect the way you think about programming,
is not worth knowing."  --Alan Perlis


From fredrik at pythonware.com  Sun Feb  5 16:47:51 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 5 Feb 2006 22:47:51 +0100
Subject: Back-end for python.org
References: <c4qdnSebt6zPBCXeRVn-pQ@comcast.com>	<dpaa87$2oa$1@panix3.panix.com>	<LN2dnQMoFpiCWyfeRVn-sg@comcast.com>	<43C4E198.2080107@holdenweb.com>	<dqksuf$dlm$1@sea.gmane.org>	<43CE35E5.8000604@pollenation.net><dqmqcm$p34$1@sea.gmane.org>	<dqnht5$rfq$1@sea.gmane.org><dqnkr4$4ju$1@sea.gmane.org>	<43CF5FBF.5090901@pollenation.net><mailman.753.1137669022.27775.python-list@python.org><bbNzf.110402$km.42803@edtnps89>	<xcNzf.110403$km.2313@edtnps89><mailman.1435.1139151734.27775.python-list@python.org>
	<Y6adnWuRaa-AqHvenZ2dnUVZ_tydnZ2d@comcast.com>
Message-ID: <ds5rq9$121$1@sea.gmane.org>

Steven Bethard wrote:

> > http://pydotorg.dyndns.org:8000
>
> Very cool.  I'd love to see something like this on the actual website...

working on it (the wiki will probably not be quite as open, though...)

> Is the hope that in the real python.org version edits will show up
> immediately, as they do in your version?  Or that the edits will be
> visible in the preview pane[1] and that clicking "Save Changes" will
> basically be a patch submission?

this depends on what the pydotorg maintainers prefer.  having tinkered
with a few alternatives, I think I prefer the immediate approach.

> [1] Currently, the style isn't the same in the preview pane, so if, for
> example, I add a "Sidebar:" section, I don't know if I've done it right
> until my edit is committed.

the wiki way is save, check finished page, and fix if necessary.  edits
are cheap.

(I'm sure it would be possible to hack moinmoin to do the preview via
the final renderer, but I'm not sure it's worth the effort.)

</F>





From aleaxit at yahoo.com  Thu Feb  2 23:05:14 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Thu, 2 Feb 2006 20:05:14 -0800
Subject: How do I dynamically create functions without lambda?
References: <1138389517.896043.7450@g47g2000cwa.googlegroups.com>
	<pan.2006.01.28.00.35.06.174939@REMOVETHIScyber.com.au>
	<1138436008.628882.126510@g44g2000cwa.googlegroups.com>
	<pan.2006.01.28.12.02.34.293286@REMOVETHIScyber.com.au>
	<drr978$oat$1@xenon.Stanford.EDU>
	<1ha3g79.1gcm6x1yziggyN%aleaxit@yahoo.com>
	<drtge7$813$1@xenon.Stanford.EDU>
Message-ID: <1ha5dnw.1i8vbgl1tfjdcnN%aleaxit@yahoo.com>

Alan Morgan <amorgan at xenon.Stanford.EDU> wrote:
   ...
> >> Since there are a lot more stupid people than clever people out there I
> >> think the more likely scenario is having to maintain unmaintainable code
> >> written by a complete idiot whose programming knowledge comes solely from
> >> books whose titles end with "In 7 Days".
> >
> >Disagree -- far more people THINK they're clever, than really ARE
> >clever.
> 
> No doubt about it, but I don't see how it contradicts my statement.

The problem comes with the ones who aren't clever, think they are, and
attempt cleverness.


> >According to a recent article in the Financial Times, over 40%
> >of a typical financial firm's employees firmly believe they are among
> >the 5% best employees of the firm -- and the situation, believe me, is
> >no different in programming.
> 
> I wonder if python, which has a low barrier to entry due to its simple
> syntax and general readability, might not have a worse time of this than
> other languages.

So far, no, according to all the people I often exchange chat on such
experiences with.  E.g., I was a panelist at SDForum the other day, the
moderator was Alexandra Weber Morales (until recently head editor of SD
Magazine, she's a freelance now), and she confirmed that Python
programmers still have the highest median and average salaries
(VisualBasic ones, the lowest), a strong indicator that they ARE good.

[[ Surprisingly, from all anecdotal experiences I hear about, the new
"digital peons" after VB programmers appear to be J2EE coders (I use the
word deliberately: people who _architect_, or even just _design_, J2EE
apps, are on a different plane -- people who _code_ J2EE apps are the
ones laboring long hours for low salaries, it seems).  And, from
somebody who desperately needs to hire a small number of stellar-quality
Java experts, I've heard strong anecdotal confirmation: candidates who
tout their "J2EE" are much more likely to be "mindless code drones" than
ones who just focus in their resume on "Java".  I don't understand J2EE
well enough to even guess at an explanation of why that might be so. ]]

Paul Graham makes the same point: if you're an entrepreneur with a
startup just ramping up, you'll get much abler people if you're looking
for Lisp or (failing that) Python programmers, than if you look for Java
programmers (he fails to distinguish between "Java" and "J2EE").

Now Lisp (or Haskell, etc) I could easily see.  But why should Python
tend to correlate with "high skill", when, as you point out, it's in
fact _simpler_?!  My current working hypothesis: Python has never been
marketed and hyped the way Java and C# &c have; somebody who CHOOSES
Python shows some ability to think for themselves, rather than following
the herd, and such ability correlated with programming skill.  Note that
this hypothesis is reasonably independent of whether Python is a great
language or not: it would apply equally well to any language that has
never been substantially hyped/marketed.  But there are probably too few
programmers who identify as, say, "D programmers", "Eiffel programmers",
etc, to show up in SD's statistics, while Python's starting (gradually,
and mostly "by word of mouth") to register on their radar...


Alex


From erniedude at gmail.com  Thu Feb  2 16:39:02 2006
From: erniedude at gmail.com (Ernesto)
Date: 2 Feb 2006 13:39:02 -0800
Subject: OS.MKDIR( ) Overwriting previous folder created...
Message-ID: <1138916342.531311.190570@g14g2000cwa.googlegroups.com>

I couldn't find this with a search, but isn't there a way to overwrite
a previous folder (or at least not perform osmkdir( ) if your program
detects it already exists).  Thanks !



From enterr at gmail.com  Sun Feb 19 03:29:30 2006
From: enterr at gmail.com (Atanas Banov)
Date: 19 Feb 2006 00:29:30 -0800
Subject: Multiplication optimization
In-Reply-To: <1140310118.365847.111120@g14g2000cwa.googlegroups.com>
References: <1140310118.365847.111120@g14g2000cwa.googlegroups.com>
Message-ID: <1140337770.128317.82980@g14g2000cwa.googlegroups.com>

Paul McGuire wrote:
> Does Python's run-time do any optimization of multiplication
> operations, like it does for boolean short-cutting?  That is, for a
> product a*b, is there any shortcutting of (potentially expensive)
> multiplication operations

no. and the reason is very simple: to the extent such optimization
makes sense, it has been done on assembler/CPU level already. i.e. when
the multiplication is mapped to the machine code
   IMUL  <op>
the Pentium processor would be smart enough not to do the work if AX or
the op are 0 or 1.

Python has no job trying to outsmart Intel (and the other chipmakers).
Boolean shortcuts are useful for entirely different reason, not speed.
e.g.
        if lastDigit == 0 or i % lastDigit != 0:
            break

if both operands of OR were to be evaluated, that would end up with
division-by-zero exception for lastDigit=0.



From steve at REMOVETHIScyber.com.au  Fri Feb 10 18:30:06 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sat, 11 Feb 2006 10:30:06 +1100
Subject: Legality of using Fonts
References: <1139591308.864757.154740@g44g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.10.23.30.05.619934@REMOVETHIScyber.com.au>

On Fri, 10 Feb 2006 09:08:28 -0800, Kamilche wrote:

> I have a question for all you Pythoneers out there. I'm making a game
> with Python, and have a need for fonts. I am currently using a free
> TrueType font, but am considering switching to a bitmap font instead.
> 
> Let's say I own a font, and use it in a paint program to 'draw some
> text' on a picture that I slap up on the Internet. Everything's
> probably fine, right? But what if I draw some text on a bitmap on the
> hard drive, add drop shadows and decorations, and use it to 'blit' text
> in a game? The answer is less obvious to me then.
> 
> Any advice you could offer would be greatly appreciated!

Free legal advice you get from non-lawyers on Usenet is worth 10% of what
you paid for it.

But generally speaking, for what it is worth (10% of nothing), you can
distribute *images* you design which happen to incorporate text from a
font, but you cannot distribute the font itself UNLESS the font is
provided under a licence which explicitly permits you to re-distribute it.

It is highly unlikely that any judge will be fooled by a mere change in
format ("but Your Honour, I converted the TTF file into a bitmap"). Adding
decorations and such merely means you have created a derivative work of
the font, which the licence may not permit.

I suggest that you use a font which comes under a clearly free to
distribute licence, or you design your own.


-- 
Steven.



From kay.schluehr at gmx.net  Mon Feb 27 00:46:54 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 26 Feb 2006 21:46:54 -0800
Subject: PEP 354: Enumerations in Python
In-Reply-To: <87accdplbj.fsf@rose.polar.local>
References: <87accdplbj.fsf@rose.polar.local>
Message-ID: <1141019214.153904.115220@j33g2000cwa.googlegroups.com>


Ben Finney wrote:

> Metaclass for creating enumeration classes
> ------------------------------------------
>
> The enumerations specified in this PEP are instances of an ``enum``
> type.  Some alternative designs implement each enumeration as its own
> class, and a metaclass to define common properties of all
> enumerations.
>
> One motivation for having a class (rather than an instance) for each
> enumeration is to allow subclasses of enumerations, extending and
> altering an existing enumeration.  A class, though, implies that
> instances of that class will be created; it is difficult to imagine
> what it means to have separate instances of a "days of the week"
> class, where each instance contains all days.  This usually leads to
> having each class follow the Singleton pattern, further complicating
> the design.
>
> In contrast, this PEP specifies enumerations that are not expected to
> be extended or modified.  It is, of course, possible to create a new
> enumeration from the string values of an existing one, or even
> subclass the ``enum`` type if desired.

Maybe a metaclass implementation complicates design, but usage is quite
simple and flexible. The classics is already referenced by the Python
docs:

http://www.python.org/doc/essays/metaclasses/Enum.py

I'm -0 on the PEP.

Kay



From donn at drizzle.com  Sat Feb  4 12:07:54 2006
From: donn at drizzle.com (Donn Cave)
Date: Sat, 04 Feb 2006 17:07:54 -0000
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<donn-C3B8DF.14535302022006@gnus01.u.washington.edu>
	<1138926741.052843.169270@z14g2000cwz.googlegroups.com>
	<donn-AC8404.17325802022006@gnus01.u.washington.edu>
	<1138965780.698016.95590@o13g2000cwo.googlegroups.com>
	<donn-442117.10474803022006@gnus01.u.washington.edu>
	<1139010489.553408.250770@g44g2000cwa.googlegroups.com>
	<1139035840.23704@jetspin.drizzle.com>
	<1139063866.255586.111690@g47g2000cwa.googlegroups.com>
Message-ID: <1139072872.4789@jetspin.drizzle.com>

Quoth n.estner at gmx.de:
...
| The first point is: Python has global functions, as well as methods. If
| f(a) should look up f inside a first, that would shadow any global or
| local f. That's bad, because python is dynamically typed, and you
| sometimes down' know what "a" is. Things like "open(filename)" or
| "tuple(a,b,c)" could behave completely unexpected, if "filename" had an
| "open" or "a" a "tuple" attribute.

Well, of course we have to assume as part of the proposal that
it would documented and actually would be expected, to the extent
that one is entitled to expect anything in Python.  It seems to
me that if you bring an even slightly open mind to the question,
when we apply "open" to an object that supports "open" with its
own function, what could be more appropriate than to call that
function?  I will allow that there is some potential for problems
here, but there may be ways to finesse them.  Haven't thought real
hard about it.

| The other point is: Python supports named arguments. The algorithm to
| put positional and named arguments into the right parameters is rather
| tricky, and it _must_ know the function that's being called to work.
| So, you simply can't make function lookup depend on the parameters,
| it's a hen-egg problem.

Ah.  I see no reason this system needs to support a named first
parameter, though, so I suppose a function application like f(a=x,...)
would be exempt from parameter lookup.  This seems like an implementation
detail.

| > Of course the whole business is kind of a joke, since there is no way
| > anyone in their right mind would wish to change Python's notation for
| > such trivial reasons, but there actually are languages that resolve
| > functions based on argument types.  Overloading in C++ is somewhat
| > like this, Haskell's typeclass mechanism, and there is a ``multiple
| > dispatch'' model that I have no experience with but is not without its
| > supporters.
|
| Yes, but both C++ and Haskell are statically typed, and neither
| supports named arguments.
| (We're talking about one function operating on one object, so I don't
| see what multiple dispatch has to do with this)

Come on, you know that in the unlikely event this idea were to be seriously
considered, someone would be hot to extend it to multiple objects before
it even got implemented on one, but in any case, single dispatch sounds
like just a restricted case of multiple dispatch, so if the latter is
feasible, so is the former.  I've heard talk about a form of static typing
for Python, and obviously that has the potential to considerably enhance
the possibilities in this area.

	Donn Cave, donn at drizzle.com


From kent at kentsjohnson.com  Mon Feb 27 14:45:44 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Mon, 27 Feb 2006 14:45:44 -0500
Subject: different ways to strip strings
In-Reply-To: <1141065454.733161.42970@z34g2000cwc.googlegroups.com>
References: <dtvgd4$ci7$1@solaris.cc.vt.edu>
	<1141065454.733161.42970@z34g2000cwc.googlegroups.com>
Message-ID: <44035248$1_3@newspeer2.tds.net>

Crutcher wrote:
> It is something of a navel (left over feature). "xyz".strip() is (I
> think) newer than string.strip()
> 
Yes, but the question as written was about str.strip() which is an 
unbound method of the str class, not string.strip() which is a 
deprecated function in the string module.

Kent


From steve at holdenweb.com  Mon Feb 20 12:00:38 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 20 Feb 2006 12:00:38 -0500
Subject: Quesion about the proper use of __slots__
In-Reply-To: <1140438776.231178.205500@g43g2000cwa.googlegroups.com>
References: <1140424508.393412.79140@o13g2000cwo.googlegroups.com>	<43f9825e$0$4777$636a55ce@news.free.fr>	<1140426860.033363.237150@o13g2000cwo.googlegroups.com>	<dtc219$h0a$01$1@news.t-online.com>	<1140428016.170547.315710@g47g2000cwa.googlegroups.com>	<1140432487.272405.297100@f14g2000cwb.googlegroups.com>	<1140434225.164304.230440@z14g2000cwz.googlegroups.com>	<dtca02$pn3$03$2@news.t-online.com>
	<1140438776.231178.205500@g43g2000cwa.googlegroups.com>
Message-ID: <dtcsje$adv$1@sea.gmane.org>

bonono at gmail.com wrote:
> Peter Otten wrote:
> 
>>>He could be working on a machine with < 1M RAM or some other
>>>constraints.
>>
>>I have 256K, by the way.
>>
> 
> Impressive, curious to know what kind of environment it is as it has
> been a long time I have seen such limited spec. My first x86(IBM PC)
> had more than that.
> 
Yeas, but that's because you are a kid who doesn't remember the 
magnificent day when Digital equipment announced their first disk drive 
for the PDP-8 series, with aa amazing 64 Kword (96 KB) capacity.

Sheesh, youngsters nowadays ... ;-)

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From erniedude at gmail.com  Thu Feb  2 16:40:51 2006
From: erniedude at gmail.com (Ernesto)
Date: 2 Feb 2006 13:40:51 -0800
Subject: Windows - create text file - (newb)
Message-ID: <1138916451.293717.283320@g44g2000cwa.googlegroups.com>

Can Python be used to create (and/or open, read, and write) a text file
in Windows (if the path is known) ?



From dolmens at gmail.com  Mon Feb 27 21:10:52 2006
From: dolmens at gmail.com (Simon Sun)
Date: Tue, 28 Feb 2006 10:10:52 +0800
Subject: sort one list using the values from another list
References: <mailman.2447.1140969980.27775.python-list@python.org>
	<4401d314_2@newspeer2.tds.net> <dtula8$r30$1@news.yaako.com>
	<dtv12h$dl2$1@wake.carmen.se>
Message-ID: <du0bfc$7lj$1@news.yaako.com>

Magnus Lycka wrote:

> Is there something here I can't see, or did you just
> change a variable name and present that as another
> solution?
Heh, I have use python for a very short time. Base your statements, I test
in python, found `_' is a valid variable name. So I don't know it is a just
a plain variable or like something pattern matching in Haskell.
-- 
Simon Sun

you can logout any time you like,
but you can never leave...


From python at hope.cz  Wed Feb  8 10:07:55 2006
From: python at hope.cz (Lad)
Date: 8 Feb 2006 07:07:55 -0800
Subject: What editor shall I use?
In-Reply-To: <dsd0s6$1sps$1@boco.fee.vutbr.cz>
References: <1139410110.389122.215400@z14g2000cwz.googlegroups.com>
	<dsd0s6$1sps$1@boco.fee.vutbr.cz>
Message-ID: <1139411275.449085.138570@g43g2000cwa.googlegroups.com>

is vim for XP?



From peter at engcorp.com  Thu Feb 23 09:07:20 2006
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 23 Feb 2006 09:07:20 -0500
Subject: How to force creation of a .pyc?
In-Reply-To: <1140630718.197661.104730@o13g2000cwo.googlegroups.com>
References: <1140630718.197661.104730@o13g2000cwo.googlegroups.com>
Message-ID: <dtkfij$puv$1@sea.gmane.org>

mrstephengross wrote:
> I would like to distribute a python program, but only in .pyc form (so
> that people cannot simply look at my code). Is there a way to do this?
> I've read up a little on the logic by which python creates .pyc's, and
> it sounds like python requires the main executed program to be in .py
> format. Any ideas?

Use the compileall module (e.g. function compile_dir) and run the .pyc 
file(s) directly.  Python doesn't care if the main one is in .py format 
and will happily run a .pyc if there's no matching .py file around.

-Peter



From sbaush at gmail.com  Tue Feb 14 06:45:15 2006
From: sbaush at gmail.com (Sbaush)
Date: Tue, 14 Feb 2006 12:45:15 +0100
Subject: PyDot problem
Message-ID: <fc5d4c490602140345j5359dab7r@mail.gmail.com>

Hi all.
I use pydot for drawing nework link.
the code is at bottom of mail.
i have a png like this attached
If you look png you can see that 10.0.0.1 and 10.0.0.2 are linked by 2
arrow, one from 1 to 2, one form 2 to 1.
Is possible to draw only one line with both arrow?
I would have a result like in route2.png but i don't know how!!!
Help me!!!

#---------------------------------------
#code
#---------------------------------------
import pydot

edges=[("10.0.0.1","10.0.0.2"), ("10.0.0.2","10.0.0.1"),("10.0.0.2","
10.0.0.7"),("10.0.0.2","10.0.0.9"),("10.0.0.2","10.0.0.6"),("10.0.0.9","
10.0.0.8"),("10.0.0.6","10.0.0.7") ]
g=pydot.graph_from_edges(edges,directed=True)
g.write_png('route.png')



--
Sbaush
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From aleaxit at yahoo.com  Mon Feb 20 11:24:04 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 20 Feb 2006 08:24:04 -0800
Subject: Processing text using python
References: <1140451760.998278.90430@g43g2000cwa.googlegroups.com>
Message-ID: <1hb1tyt.1ado4hvq0wl5iN%aleaxit@yahoo.com>

nuttydevil <sjw28 at sussex.ac.uk> wrote:

> Hey everyone! I'm hoping someone will be able to help me, cause I
> haven't had success searching on the web so far... I have large chunks
> of text ( all in a long string) that are currently all in separate
> notebook files. I want to use python to read these strings of text,
> THREE CHARACTERS AT A TIME. (I'm studying the genetic code you see, so
> I need to read and analyse each sequence one codon at a time
> effectively.) Does anyone have any idea of how to do this using python?

Open each file and call thefile.read(3) in a loop, move to the next file
when the current one is exhausted.  What part of this is giving you
problems?


Alex


From fredrik at pythonware.com  Mon Feb  6 07:30:30 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 6 Feb 2006 13:30:30 +0100
Subject: Strange behavior with os call in cgi script
References: <1139171873.431432.195080@f14g2000cwb.googlegroups.com>	<43e665f1$1@news.uni-ulm.de>	<1139176638.972414.19590@g47g2000cwa.googlegroups.com><tf0du1h7sn03joag0cpjkmtm6hgfg2ppnv@4ax.com><mailman.1464.1139197674.27775.python-list@python.org>
	<kbceu1thb6r2trb5u78ml5m9omlbs15moe@4ax.com>
Message-ID: <ds7fh8$io6$1@sea.gmane.org>

Rene Pijlman wrote:

> But I do think that adding logging to a cgi script is a sensible thing to
> do for a beginner. Getting that to run in a debugger is probably way more
> complicated.

on the other hand, adding

    if 1: # set to 0 when deploying
        print "<pre>"
        print cgi.escape(repr(os.environ))
        print "</pre>"

to the CGI script isn't that hard... (if you're willing to do "view source" in
the browser, you can skip the <pre> and cgi.escape() stuff...)

</F>





From uymqlp502 at sneakemail.com  Wed Feb 22 20:28:35 2006
From: uymqlp502 at sneakemail.com (Russ)
Date: 22 Feb 2006 17:28:35 -0800
Subject: "configuring" a class
Message-ID: <1140658115.672421.207560@g47g2000cwa.googlegroups.com>

I would like to let the user of one of my classes "configure" it by
activating or de-activating a particular behavior (for all instances of
the class).

One way to do this, I figured, is to have a static class variable,
along with a method to set the variable. However, I am stumped as to
how to do that in python. Suggestions welcome.

The next best thing, I figure, is to just use a global variable.
Several "methods" of the class then check the value of the global
variable to determine what to do. The user can then just set the
variable to get the desired behavior.

However, I tried this and it does not seem to work. I imported the
class, then set the global variable. But the new value of the variable
somehow did not get back into the class methods that need to see it.

Can anyone give me a clue about this? If there is a better way, please
let me know. Thanks.



From dwilson.soap at gmail.com  Wed Feb 15 07:54:11 2006
From: dwilson.soap at gmail.com (Dylan Wilson)
Date: 15 Feb 2006 04:54:11 -0800
Subject: pop line from file
In-Reply-To: <mailman.1939.1139998965.27775.python-list@python.org>
References: <mailman.1939.1139998965.27775.python-list@python.org>
Message-ID: <1140008051.077769.107010@g43g2000cwa.googlegroups.com>

Try open.readline()

>>>help(open)
...



From ndbecker2 at gmail.com  Sat Feb 11 11:06:01 2006
From: ndbecker2 at gmail.com (Neal Becker)
Date: Sat, 11 Feb 2006 11:06:01 -0500
Subject: [ANN] functional 0.5 released
References: <43aa6ff70602100913r6d896f16vef201d5d4099608d@mail.gmail.com>
Message-ID: <dsl219$e62$1@sea.gmane.org>

I just installed from .tar.gz on fedora FC5 x86_64.  I ran into 1 small
problem:

sudo python setup.py install --verbose
running install
running bdist_egg
running egg_info
writing functional.egg-info/PKG-INFO
writing top-level names to functional.egg-info/top_level.txt
reading manifest file 'functional.egg-info/SOURCES.txt'
writing manifest file 'functional.egg-info/SOURCES.txt'
installing library code to build/bdist.linux-x86_64/egg
running install_lib
running build_ext
creating build/bdist.linux-x86_64/egg
copying build/lib.linux-x86_64-2.4/functional.so ->
build/bdist.linux-x86_64/egg
creating stub loader for functional.so
byte-compiling build/bdist.linux-x86_64/egg/functional.py to functional.pyc
creating build/bdist.linux-x86_64/egg/EGG-INFO
writing functional.egg-info/native_libs.txt
copying functional.egg-info/SOURCES.txt ->
build/bdist.linux-x86_64/egg/EGG-INFO
copying functional.egg-info/native_libs.txt ->
build/bdist.linux-x86_64/egg/EGG-INFO
copying functional.egg-info/PKG-INFO ->
build/bdist.linux-x86_64/egg/EGG-INFO
copying functional.egg-info/top_level.txt ->
build/bdist.linux-x86_64/egg/EGG-INFO
copying functional.egg-info/zip-safe ->
build/bdist.linux-x86_64/egg/EGG-INFO
creating 'dist/functional-0.5-py2.4-linux-x86_64.egg' and adding
'build/bdist.linux-x86_64/egg' to it
removing 'build/bdist.linux-x86_64/egg' (and everything under it)
Processing functional-0.5-py2.4-linux-x86_64.egg
Removing /usr/lib64/python2.4/site-packages/functional-0.5-py2.4-linux-x86_64.egg
Copying functional-0.5-py2.4-linux-x86_64.egg
to /usr/lib64/python2.4/site-packages

Installed /usr/lib64/python2.4/site-packages/functional-0.5-py2.4-linux-x86_64.egg

Because this distribution was installed --multi-version or --install-dir,
before you can import modules from this package in an application, you
will need to 'import pkg_resources' and then use a 'require()' call
similar to one of these examples, in order to select the desired version:

    pkg_resources.require("functional")  # latest installed version
    pkg_resources.require("functional==0.5")  # this exact version
    pkg_resources.require("functional>=0.5")  # this version or higher

Processing dependencies for functional==0.5

What's all this about multi-version?  Did I do something wrong?



From aleaxit at yahoo.com  Sun Feb 26 20:25:23 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 26 Feb 2006 17:25:23 -0800
Subject: sort one list using the values from another list
References: <mailman.2447.1140969980.27775.python-list@python.org>
	<Bb-dncKoOeYvQ5zZRVn-uw@comcast.com>
	<1140981038.788111.93500@j33g2000cwa.googlegroups.com>
	<9bpMf.109707$4l5.58949@dukeread05>
	<1140990438.693026.14600@p10g2000cwp.googlegroups.com>
	<00sMf.109743$4l5.9230@dukeread05>
Message-ID: <1hbdmux.1uvypp25sjx7jN%aleaxit@yahoo.com>

Ron Adam <rrr at ronadam.com> wrote:
   ...
> Considering the number time I sort keys after getting them, It's the 
> behavior I would prefer.  Maybe a more dependable dict.sortedkeys() 
> method would be nice.  ;-)

sorted(d) is guaranteed to do exactly the same thing as sorted(d.keys())
AND to be faster (would be pretty weird if it weren't faster...!).

E.g., ...:

helen:~ alex$ python -mtimeit -s'd=dict(enumerate("tarazoplay"))'
'sorted(d.keys())'
100000 loops, best of 3: 6.82 usec per loop

helen:~ alex$ python -mtimeit -s'd=dict(enumerate("tarazoplay"))'
'sorted(d)'
100000 loops, best of 3: 5.98 usec per loop


Alex


From python at rcn.com  Thu Feb 23 07:19:08 2006
From: python at rcn.com (Raymond Hettinger)
Date: 23 Feb 2006 04:19:08 -0800
Subject: Psychic bug
In-Reply-To: <8qcpv1hrcepsukouv371seacoe40u0lr43@4ax.com>
References: <8qcpv1hrcepsukouv371seacoe40u0lr43@4ax.com>
Message-ID: <1140697148.196680.321510@e56g2000cwe.googlegroups.com>

>  a mutate function for a genetic algorithm which is giving me
> odd results. I suspect I'm missing somthing really simple, so I'd be
> grateful for any suggestions. Basically, when I comment out the line
> which is commented out below, it works fine (although of course it
> doesn't change the genome). When I uncomment it gen[letter]
> automagically gets the value base in the print statements, before the
> assignment has been made. And it still doesn't update the genome.

The code looks fine to me and your description suggests that the
problem lies elsewhere -- the genome instance is getting updated
but the tool to look at it is working on an unmutated copy.

When you see the "automagic" value assignment appearing before
the assignment is even made, it is a cue that the assignment got
made on a previous run and was esssentially already done when
the function was called a second time.

An easy way to see this in action is to add print statements to the
beginning and end of the mutate function:

    print self.genome[:70]

So, I think the error is likely in the calling code and not in the
mutate function.


Raymond



From steve at REMOVETHIScyber.com.au  Wed Feb 15 07:37:52 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Wed, 15 Feb 2006 23:37:52 +1100
Subject: how to write a C-style for loop?
References: <gZednVPdAtumI2_eRVn-jw@rcn.net>
	<xfDIf.178309$65.4923952@twister1.libero.it>
Message-ID: <pan.2006.02.15.12.37.48.626409@REMOVETHIScyber.com.au>

On Wed, 15 Feb 2006 10:20:13 +0000, ZeD wrote:

> Ciao, John Salerno! Che stavi dicendo?
> 
>> for (int i = 0; i < 50; i += 5)
>> 
>> How would that go in Python, in the simplest and most efficient way?
> 
> i=0
> while i<50:
>     #...
>     i+=5

That's exceedingly unPythonic. In fact I'd go far to say it is bad
practice in just about any programming language that has for loops. Why on
earth would any sensible programmer want to manage the loop variable by
hand if the language can do it for you?


> about range()/xrange(): what if you want to traslate this c-loop? for
> (int i=1; i<50; i*=2)

That's a completely different question, so of course it has a completely
different answer. Here is one way:

for i in [2**n for n in range(6)]:
    do_something(i)

Here is another:

for i in range(int(math.log(50)/math.log(2)+1)):
    do_something(2**i)

Here is a third way:

i = 1
while i < 50:
    do_something(i)
    i *= 2

Here is a fourth way:

import operator
def looper(start, (op, finish), (op2, x)):
    n = start
    while op(n, finish):
        yield n
        n = op2(n, x)

loop = looper(1, (operator.__lt__, 50), (operator.__mul__, 2))

for i in loop:
    do_something(i)



-- 
Steven.



From nina at siteworx.com  Tue Feb 21 09:26:12 2006
From: nina at siteworx.com (Nina Almaguer)
Date: Tue, 21 Feb 2006 09:26:12 -0500
Subject: message
Message-ID: <83A09C47AC2C18478A50F393D26B53103EADD0@exchange.siteworx.local>

Hi, 
We are a web integration firm in Reston, VA and would like to post the
following developer position (I have already joined the group).
 
 
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field and 1+ years experience (internships applicable) in software
development.  Fluency with three or more of following is necessary:
XHTML, CSS, C/C++, Javascript, Java, Python, XSLT.  A background in
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.............................................
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.............................................

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703 520 1550 x224 direct 
571 239 2841 mobile 
703 935  0426  fax
.............................................
nina at siteworx.com
www.siteworx.com

 

 
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From larry.bates at websafe.com  Tue Feb 21 19:36:22 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 21 Feb 2006 18:36:22 -0600
Subject: Basic coin flipper program - logical error help
In-Reply-To: <1140567243.251982.255620@g14g2000cwa.googlegroups.com>
References: <1140567243.251982.255620@g14g2000cwa.googlegroups.com>
Message-ID: <feCdnY8mJIqcL2benZ2dnUVZ_tmdnZ2d@comcast.com>

DannyB wrote:
> I'm just learning Python.  I've created a simple coin flipper program -
> here is the code:
> 
> [source]
> #Coin flipper
> import random
> 
> heads = 0
> tails = 0
> counter = 0
> 
> coin = random.randrange(2)
> 
> while (counter < 100):
>     if (coin == 0):
>         heads += 1
>         counter += 1
>     else:
>         tails += 1
>         counter += 1
> 
> coin = random.randrange(2)
> 
> 
> print "\nThe coin landed on heads", heads, "times."
> print "\nThe coin landed on tails", tails, "times."
> [/source]
> 
> <<<I'm sure the [source] tags don't work - I through them in there
> anyway.>>>
> 
> The program runs - however - it will give me 100 heads OR 100 tails.
> Can someone spot the logic error?  
> 
> Thanks
> 
> ~Dan
> 
Looks an awful lot like your homework, but I'll give you a clue.
You need to get the your coin tosses inside your loop.  Otherwise
you only toss the coin once and then loop 100 times with the
same value.

-Larry Bates


From mailinglist4ken at gmail.com  Thu Feb 16 01:07:55 2006
From: mailinglist4ken at gmail.com (Kenneth Xie)
Date: Thu, 16 Feb 2006 14:07:55 +0800
Subject: any ftpd written in python?
Message-ID: <43F416BB.8050905@gmail.com>

I need a simple ftpd example in pure python. Is there already such a 
ftpd available?
Thank you very much in advance.


From jason.w.kane at gmail.com  Thu Feb 16 19:35:13 2006
From: jason.w.kane at gmail.com (Kane)
Date: 16 Feb 2006 16:35:13 -0800
Subject: mod_python and open HTTP connection
In-Reply-To: <op.s421hyqcix6gqv@charles>
References: <op.s421hyqcix6gqv@charles>
Message-ID: <1140136513.433942.61470@g43g2000cwa.googlegroups.com>

> Does mod_python time out after a minute ?

No, but the browser may timeout.  Sending a periodic bit-o-data on a
long running page is a good idea anyway (so the user knows it is still
working).

>If I leave  an HTTP connection open so that the content keeps loading inside the
>browser window indefinately, and if I close the browser window, the
>mod_python process is terminated, right?

In general this is not an issue.  However it depends to some degree on
what your mod_python program is doing.  Here is a really, REALLY feeble
example w/publisher:

def ping(req, target_ip):
  import commands
  output = commands.getoutput('ping -c 10000 %s' % target_ip)
  return output

Even if the user closes the window or hits 'stop' the process stays
until the ping finishes.  In this example this is merely annoying (10k
pings takes almost 3 hours) but if it had been 'fping -el %s' instead
you would be in real trouble (since it would never exit).

Restarting apache clears such zombie processes.

btw, 'ping' as written above is horrible.  If a code review turned
_that_ up on production someone would be fired, along with whoever
hired them, whoever ate lunch with them and anyone that waves goodbye.



From Ido.Yehieli at gmail.com  Wed Feb 15 17:30:11 2006
From: Ido.Yehieli at gmail.com (Ido Yehieli)
Date: 15 Feb 2006 14:30:11 -0800
Subject: apache mod_python problem
Message-ID: <1140042611.557816.247140@g14g2000cwa.googlegroups.com>

Hi all,
    I have succesfully installed apache+mod_python (ubuntu 5.10
(Breezy),
libapache2-mod-python2.4 Version: 3.1.3-3ubuntu1,
apache2 Version: 2.0.54-5ubuntu4,
python2.4 Version: 2.4.2-1).

It seems apache and everything functions fine. I tried to run the
example application from the mod_python site
(http://www.modpython.org/examples/psp_site.tgz) by decompressing the
tgz file in a place where apache can find it, and then access it via
mozilla firefox (simply http://127.0.0.1/psp_site/ where 'psp-site' is
the name of the directory.)

However, instead of running the index.py page like it shoud, I just get
the list of files, as in:

Index of /psp_site

Icon  Name                    Last modified      Size  Description[DIR]
Parent Directory                             -
[TXT] PyFontify.py            15-Feb-2006 23:02  4.3K
[DIR] images/                 15-Feb-2006 23:02    -
[TXT] index.py                15-Feb-2006 23:02  3.4K
[   ] index.pyc               15-Feb-2006 23:02  4.1K
[TXT] py2html.py              15-Feb-2006 23:02   13K
[DIR] styles/                 15-Feb-2006 23:02    -
[DIR] templates/              15-Feb-2006 23:02    -
[TXT] view.py                 15-Feb-2006 23:02  726


and clicking any of the .py files just opens the 'open/save' menu. The
.htaccess file contains:

SetHandler mod_python
PythonHandler mod_python.publisher
PythonDebug On

everything is exactly as it is on "http://www.modpython.org/examples/",
I didn't change anything.

Anyone has any idea as to what went wrong?

Thank you in advance,
Ido Yehieli.



From khemkaamit at gmail.com  Fri Feb 10 11:58:05 2006
From: khemkaamit at gmail.com (Amit Khemka)
Date: Fri, 10 Feb 2006 22:28:05 +0530
Subject: ordered sets operations on lists..
Message-ID: <1360b7230602100858l5b648288jd58f4e56e3a2c8f9@mail.gmail.com>

Hello, Is there a *direct* way of doing set operations on lists which
preserve the order of the input lists ?
For Ex.  l1 = [1, 5, 3, 2, 4, 7]
            l2 =  [3, 5,  10]

and (l1 intersect l2)  returns [5, 3]     .... (and (l2 intersect l1) 
returns [3, 5])

thanks in advance,
amit.

--
----
Amit Khemka -- onyomo.com
Endless the world's turn, endless the sun's Spinning, Endless the quest;
I turn again, back to my own beginning, And here, find rest.


From hancock at anansispaceworks.com  Tue Feb 14 03:15:22 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Tue, 14 Feb 2006 02:15:22 -0600
Subject: how do you pronounce 'tuple'?
In-Reply-To: <ieGdnftVlNuA3WzenZ2dnUVZ_t2dnZ2d@speakeasy.net>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
	<mailman.1857.1139863723.27775.python-list@python.org>
	<ieGdnftVlNuA3WzenZ2dnUVZ_t2dnZ2d@speakeasy.net>
Message-ID: <20060214021522.5d2ab878@samwise.anansi>

On Mon, 13 Feb 2006 18:27:40 -0800
Erik Max Francis <max at alcyone.com> wrote:
> Terry Hancock wrote:
> > The only tuple I pronounce with the "-uh-" is "couple",
> > and I usually call that a "two-tuple" when dealing with
> > Python.
> 
> I prefer the name _pair_ :-).

Yeah, that works too.
 
> > So what's a 1-element tuple, anyway? A "mople"? 
> > "monople"? It does seem like this lopsided pythonic
> > creature (1,) ought to have a name to reflect its ugly,
> > newbie-unfriendly nature.
> 
> In mathematics there's really no such entity ...

Yeah, well that's we have no name for it. And yet, there
it is.

> Of course that's still a completely valid construct in
> Python so the  question stands.  If a 4-tuple is a
> quadruple, a 3-tuple is a triple, a  2-tuple is an pair,
> then I guess a 1-tuple would be a single.  Granted  that's
> not nearly as gruesome enough a name to go with the
> special  lopsided Pythonic creature mentioned above.  I
> suggest we name it a  hurgledink.

Best suggestion I've heard yet! ;-)

Thanks all -- I really laughed reading this thread, I
really didn't expect my stupid question to get such
an enthusiastic response. :-D

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From mistobaan at gmail.com  Sun Feb 19 05:01:57 2006
From: mistobaan at gmail.com (Fabrizio Milo)
Date: Sun, 19 Feb 2006 11:01:57 +0100
Subject: aborting without killing the python interpreter
In-Reply-To: <dt96kh$g0l$1@sea.gmane.org>
References: <1140320926.993703.90380@o13g2000cwo.googlegroups.com>
	<dt96kh$g0l$1@sea.gmane.org>
Message-ID: <e437f2f0602190201k3e944e4eg61685cad9cca5b0@mail.gmail.com>

import sys

def main():
    print 'exiting'
    sys.exit()

try:
   main()
except SystemExit:
   pass


> I suspect I may need to use exceptions, but I'm hoping
> not to need them. Thanks.

Use the Exceptions!


From ongkokleong at gmail.com  Wed Feb 22 04:09:17 2006
From: ongkokleong at gmail.com (ongkokleong at gmail.com)
Date: 22 Feb 2006 01:09:17 -0800
Subject: gmail written in python?
Message-ID: <1140599357.785106.230270@f14g2000cwb.googlegroups.com>

any idea?



From sakcee at gmail.com  Mon Feb 20 18:01:53 2006
From: sakcee at gmail.com (Sakcee)
Date: 20 Feb 2006 15:01:53 -0800
Subject: html parser  , unexpected '<' char in declaration
Message-ID: <1140473997.262973.149260@f14g2000cwb.googlegroups.com>

html =
'<html><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
<head></head> <body bgcolor=#ffffff>\r\n Foo foo , blah blah
</body></html>'

>>> import htmllib
>>> import formatter
>>> parser=htmllib.HTMLParser(formatter.NullFormatter())
>>> parser.feed(html)

Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/lib/python2.4/sgmllib.py", line 95, in feed
    self.goahead(0)
  File "/usr/lib/python2.4/sgmllib.py", line 165, in goahead
    k = self.parse_declaration(i)
File "/usr/lib/python2.4/markupbase.py", line 132, in parse_declaration
    self.error(
  File "/usr/lib/python2.4/htmllib.py", line 40, in error
    raise HTMLParseError(message)
htmllib.HTMLParseError: unexpected '<' char in declaration


the error is generated by unclosed DOCTYPE declaration

what is the best way to handle this kind of document. should I use
regex to check and strip, or does HTMLParser offers something? , can i
override default sgmllib behaviour
I have to work with this htmllib because of existing modules .


thanks



From gene.tani at gmail.com  Sun Feb 12 08:12:52 2006
From: gene.tani at gmail.com (gene tani)
Date: 12 Feb 2006 05:12:52 -0800
Subject: Is there any books such as 'effective python' or else about the
	performance?
In-Reply-To: <mailman.1738.1139652404.27775.python-list@python.org>
References: <mailman.1738.1139652404.27775.python-list@python.org>
Message-ID: <1139749972.715280.54110@g14g2000cwa.googlegroups.com>


Kenneth Xie wrote:
> att, thx.

Start here.

http://www.python.org/moin/PythonSpeed/PerformanceTips
http://trific.ath.cx/resources/python/optimization/



From duncan.booth at invalid.invalid  Sat Feb 18 06:05:47 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 18 Feb 2006 11:05:47 GMT
Subject: commenting out blocks of code
References: <20060217231846.87613.qmail@web36708.mail.mud.yahoo.com>
	<mailman.2077.1140221554.27775.python-list@python.org>
	<pan.2006.02.18.01.36.05.856023@REMOVETHIScyber.com.au>
Message-ID: <Xns976E70D8BC4D6duncanbooth@127.0.0.1>

Steven D'Aprano wrote:

>> Scite, for example, lets me selected a block and hit Ctrl-Q to either 
>> comment or uncomment the block.
> 
> I see the developers of Scite are either newbies to GUI programming, or
> they operate in a world of their own. Ctrl-Q is reserved for Quit (or
> Exit) in every GUI API I know of.

Your experience obviously differs from mine. I just tried Ctrl-Q on both 
windows and ubuntu and in neither case did it exit applications 
consistently: For example Firefox uses Alt-F4 in both cases.

My own favourite editor (Epsilon) uses Ctrl-Q for the 'quoted-insert' 
command (hardly suprising given its similarity to emacs).

>> (It does this by prefixing each line 
>> with #~ instead of just #, which allows it to detect when a line is 
>> already so commented and reverse the operation.)  
> 
> It is *easy* to detect when a line is already commented. It starts with a
> #. The ~ is superfluous.
> 
Not so easy if the lines to be commented already contain some lines 
starting with comments. Messing around with the comments themselves sounds 
highly unsatisfactory though.

I agree with you that the best solution is to use different commands (or as 
Epsilon does a single command which can be modified with a prefix Ctrl-U). 
That way I can select a large region and comment it all out, or uncomment 
disjoint parts of it as I choose.


From ivoras at fer.hr  Sat Feb  4 18:23:32 2006
From: ivoras at fer.hr (Ivan Voras)
Date: Sun, 05 Feb 2006 00:23:32 +0100
Subject: Thread imbalance
In-Reply-To: <1138912272.382474.13170@g44g2000cwa.googlegroups.com>
References: <1138912272.382474.13170@g44g2000cwa.googlegroups.com>
Message-ID: <ds3d35$mo6$2@bagan.srce.hr>

Tuvas wrote:

> waits for a lul in the computing process. How can I ensure that this
> does not happen? This thread uses little processing power, so it could
> be set to a high priority, if there is a way to do this. Thanks!

Python is bad for concurrently executing/computing threads, but it 
shouldn't be that bad - do you have lots of compute-intensive threads?

If you are running on a unix-like platform, see documentation for 
signal() and SIGALRM - maybe it will help your task.


From wweston at att.net  Tue Feb 21 19:39:16 2006
From: wweston at att.net (wes weston)
Date: Wed, 22 Feb 2006 00:39:16 GMT
Subject: Basic coin flipper program - logical error help
In-Reply-To: <1140567243.251982.255620@g14g2000cwa.googlegroups.com>
References: <1140567243.251982.255620@g14g2000cwa.googlegroups.com>
Message-ID: <UoOKf.49379$id5.43228@bgtnsc04-news.ops.worldnet.att.net>

DannyB wrote:
> I'm just learning Python.  I've created a simple coin flipper program -
> here is the code:
> 
> [source]
> #Coin flipper
> import random
> 
> heads = 0
> tails = 0
> counter = 0
> 
> coin = random.randrange(2)
> 
> while (counter < 100):
>     if (coin == 0):
>         heads += 1
>         counter += 1
>     else:
>         tails += 1
>         counter += 1
> 
> coin = random.randrange(2)
> 
> 
> print "\nThe coin landed on heads", heads, "times."
> print "\nThe coin landed on tails", tails, "times."
> [/source]
> 
> <<<I'm sure the [source] tags don't work - I through them in there
> anyway.>>>
> 
> The program runs - however - it will give me 100 heads OR 100 tails.
> Can someone spot the logic error?  
> 
> Thanks
> 
> ~Dan
> 

Dan,
    Looping is easier with:
for x in range(100):
    if random.randint(0,1) == 0:
       heads += 1
    else:
       tails += 1

Inside the loop you need to "flip" on each pass.
You're "flipping" once before the start of the loop now.
wes


From jearl at xmission.com  Tue Feb  7 23:32:39 2006
From: jearl at xmission.com (Jason Earl)
Date: Tue, 07 Feb 2006 21:32:39 -0700
Subject: HTML page into a string
References: <1139367066.060542.62260@g14g2000cwa.googlegroups.com>
Message-ID: <87mzh2v5aw.fsf@workhorse.earlhome>

"Tempo" <bradfordh at gmail.com> writes:

> In my last post I received some advice to use urllib.read() to get a
> whole html page as a string, which will then allow me to use
> BeautifulSoup to do what I want with the string. But when I was
> researching the 'urllib' module I couldn't find anything about its
> sub-section '.read()' ? Is that the right module to get a html page
> into a string? Or am I completely missing something here? I'll take
> this as the more likely of the two cases. Thanks for any and all help.


Here's a short example of how this all works:

#!/usr/bin/env python

import urllib2
from BeautifulSoup import BeautifulSoup

response = urllib2.urlopen('http://www.cnn.com')
soup = BeautifulSoup(response)
print soup.prettify()

It's not a particularly useful example, unless, of course, you wish to
prettify cnn's html, but it should get you to the point where
BeautifulSoup's documentation starts to make sense.

Jason


From michaeltaft at gmail.com  Sun Feb 12 03:00:50 2006
From: michaeltaft at gmail.com (mwt)
Date: 12 Feb 2006 00:00:50 -0800
Subject: Clearing the screen
In-Reply-To: <pan.2006.02.12.06.59.19.550394@REMOVETHIScyber.com.au>
References: <1139688262.046667.296940@g14g2000cwa.googlegroups.com>
	<mailman.1761.1139688853.27775.python-list@python.org>
	<1139725568.890659.253770@f14g2000cwb.googlegroups.com>
	<pan.2006.02.12.06.59.19.550394@REMOVETHIScyber.com.au>
Message-ID: <1139731250.332185.278280@o13g2000cwo.googlegroups.com>

No guessing needed. If I just use os.system("clear") on its own, no
problem. Also, if I use the magic formula you gave on its own, that
works to. But in the app, (see below), neither command works. I'm
missing something obvious, but I'm... missing it.

def run(self, userinfo):
        """Time when to do stuff"""
        self.teamname = userinfo[0]
        self.username = userinfo[1]
        self.refreshinterval = userinfo[2]
        self.statsfile = userinfo[3]
        print self.username, "", self.teamname
        self.minutes = 0
        while 1:
            try:
                """ Checks for internet stats once per hour """
                if self.minutes == 0:
                    self.get_online_stats(self.statsfile)
                self.minutes += 1
                if self.minutes == 60:
                    self.minutes = 0
                self.output()
                time.sleep(60) #nite-nite
            except KeyboardInterrupt:#user types Ctrl-C
                print "Bye bye."
                os.system("clear")
                sys.exit()


    def output(self):
        os.system("clear") #clear the screen
        print "****************************************"
        print "*                   Monitor                  *"
        print "****************************************"
        print "*                                      *"
        self.get_unit_info('/opt/foldingathome/1/unitinfo.txt')#print
the current unit info
        print "\n  last updated at", time.strftime("%Y-%m-%d %H:%M:%S",
time.localtime(time.time()))
        print "*                                      *"
        print "*************    Stats    **************"
        print "*                                      *"
        self.get_saved_stats(self.statsfile)
        print "*                                      *"
        print "****************************************"



From noway at sorry.com  Tue Feb 21 04:57:42 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Tue, 21 Feb 2006 09:57:42 GMT
Subject: Little tool - but very big size... :-(
References: <mailman.2211.1140513270.27775.python-list@python.org>
Message-ID: <quBKf.1339$A83.42251@twister1.libero.it>

Durumdara wrote:

> I need to have more compressed result. Can I compress dll-s, pyd-s
> with Py2Exe ?
> Can I decrease the total size with something ?
>
> If not, how to I create an self-unpackager and self-starter program
> that use an temporary directory in the disk ? With WinRar ?


You can use PyInstaller (http://pyinstaller.hpcf.upr.edu). PyInstaller easily
builds a single executable with everything inside it. It also optionally
compresses everything with UPX (http://upx.sourceforge.net/) so to reduce the
size at the maximum.

There are also other choices that can be made. For instance, wxWidgets is
*HUGE*.
-- 
Giovanni Bajo




From fabioxgn at gmail.com  Fri Feb 24 20:44:56 2006
From: fabioxgn at gmail.com (sapo)
Date: 24 Feb 2006 17:44:56 -0800
Subject: PyGTK + Glade = weird problem
Message-ID: <1140831896.360625.172620@p10g2000cwp.googlegroups.com>

Hi all, i ve started learning pygtk with glade, i m just making some
test stuff. but i got some problems with simple things.

I designed 2 windows on glade, then exported it and loaded in the
python script, the second window is hidden by default, then i wrote a
function to show it up, ok it shows, them i wrote another function to
hide it.. ok it hides...

But in the second time i show the window.. the window appear EMPTY,
with just the title and NOTHING inside..

This is well explained here:

http://ubuntuforums.org/showthread.php?p=768219

Hope someone can help me, i tried irc, forums, googled a lot.. but
nothing solves my problem, even rewriting the code by hand results on
the same thing!

thanx for any help



From crutcher at gmail.com  Mon Feb 27 13:37:34 2006
From: crutcher at gmail.com (Crutcher)
Date: 27 Feb 2006 10:37:34 -0800
Subject: different ways to strip strings
In-Reply-To: <dtvgd4$ci7$1@solaris.cc.vt.edu>
References: <dtvgd4$ci7$1@solaris.cc.vt.edu>
Message-ID: <1141065454.733161.42970@z34g2000cwc.googlegroups.com>

It is something of a navel (left over feature). "xyz".strip() is (I
think) newer than string.strip()



From steven.klass at gmail.com  Sun Feb 12 17:45:38 2006
From: steven.klass at gmail.com (rh0dium)
Date: 12 Feb 2006 14:45:38 -0800
Subject: Need a bit of help with a list..
Message-ID: <1139784338.534772.311320@f14g2000cwb.googlegroups.com>

Hi all,


Why doesn't this work as expected..  I expect that the the lines within
the sections will get modified - permanently.  It is modifying them
during the first section but they never get saved to the new values..
Can anyone help me and even better explain why it's not working..

        for section in self.sections:
            nidx = 0
            for line in self.sections[section]:
                if re.match(r"^.*\+$",line):
                    line = line[:-1]
                    line = line + " " + self.sections[section][nidx+1]
                    print nidx, "+ found -total lines",
len(self.sections[section]), line
                    del self.sections[section][nidx+1]
                    nidx += 1
                else:
                    nidx += 1

        for secs in self.sections:
            print " %s" % secs
            for line in self.sections[secs]:
                 print "  %s" % line

self.section[foo]=["Param_Set primitive:rdv_AIO_reg50_top_IPTOP
id:chip_top_pads!reg50ma +",
"    VDD18:VDD1_CR18 VDD33:VDD1_CR33 VSSA:VSSCORE", "Param_Set
instance:chip_top_pads!PAD_3    APAD:PIN_VTRIP_IN + ", " RC:RC_5A
VDDCR:VDD1_CR18 VDDIO:VDD1_IO33 VSSCR:VSSCORE +"," VDDIO5:VDD1_IO5A
VDDIO5DIV2:VDD1_IO5DIV2A VSSIO:VSS_IO"]

Many thanks!!



From newstonne at web.de  Wed Feb  8 13:28:08 2006
From: newstonne at web.de (Roland Heiber)
Date: Wed, 08 Feb 2006 19:28:08 +0100
Subject: A __getattr__ for class methods?
In-Reply-To: <1139421293.213901.5380@f14g2000cwb.googlegroups.com>
References: <1139421293.213901.5380@f14g2000cwb.googlegroups.com>
Message-ID: <dsddck$p4d$1@news.web.de>

Dylan Moreland wrote:
> I have a metaclass generating basic properties such as .name and .city,
> but I don't want to generate a class method for every permutation of
> the attributes. I'd like to have something much like __getattr__ for
> instance attributes, so that if a method like
> Person.find_by_city_and_email cannot be found, I can construct a call
> to the basic find method that hides the SQL. Is there any way of doing
> this, or am I trying to mirror a functionality that Python simply does
> not have?
> 

I don't get it? __getattr__ is exactly what you are looking for:

http://docs.python.org/ref/attribute-access.html#l2h-206

__getattr__( self, name)

Called when an attribute lookup has not found the attribute in the usual 
places (i.e. it is not an instance attribute nor is it found in the 
class tree for self). name is the attribute name. This method should 
return the (computed) attribute value or raise an AttributeError exception.

HtH, Roland


From dbasch at yahoo.com  Mon Feb 27 16:59:36 2006
From: dbasch at yahoo.com (Derek Basch)
Date: 27 Feb 2006 13:59:36 -0800
Subject: Matplotlib logarithmic scatter plot
In-Reply-To: <1141075713.027689.66800@t39g2000cwt.googlegroups.com>
References: <1141073994.346490.16070@j33g2000cwa.googlegroups.com>
	<1141075713.027689.66800@t39g2000cwt.googlegroups.com>
Message-ID: <1141077576.303733.31070@i40g2000cwc.googlegroups.com>

Thanks for the reply. I need a scatter plot though. Can that be done?



From nid_oizo at yahoo.com_remove_the_  Tue Feb 28 17:59:12 2006
From: nid_oizo at yahoo.com_remove_the_ (Nicolas Fleury)
Date: Tue, 28 Feb 2006 17:59:12 -0500
Subject: Make staticmethod objects callable?
In-Reply-To: <goqdnTRMGvPFWpnZ4p2dnA@comcast.com>
References: <Ad2Nf.2695$RM2.303150@news20.bellglobal.com>
	<goqdnTRMGvPFWpnZ4p2dnA@comcast.com>
Message-ID: <4B4Nf.2799$RM2.314099@news20.bellglobal.com>

Steven Bethard wrote:
> Nicolas Fleury wrote:
> 
>> I was wondering if it would make sense to make staticmethod objects 
>> callable, so that the following code would work:
>>
>> class A:
>>     @staticmethod
>>     def foo(): pass
>>     bar = foo()
> 
> Do you have a real-world use case?  I pretty much never use 
> staticmethods (preferring instead to use module-level functions) so I'm 
> having a hard time coming up with some code where this would be really 
> useful.  I'm also a little wary of breaking the parallel between 
> classmethod and staticmethod which are currently *just* descriptors 
> (without any other special functionality).

Well, IMHO, if staticmethod is worth being standard, than calling these 
static methods inside the class definition is worth being supported.  To 
be honest I don't use static methods like you, but users come see me 
asking "Why?" and I find their code logically structured so I conclude 
there's a usability problem here.

> Maybe instead of making just staticmethods callable, both staticmethods 
> and classmethods could gain an 'im_func' attribute like bound and 
> unbound methods have?

I don't like it either (__get__ can be called anyway).  My problem is 
the expectation of the user.  I wonder if it should just work.  Adding a 
few lines of code in staticmethod is worth it if it avoids all these 
questions over and over again, no?

Regards,
Nicolas


From mhellwig at xs4all.nl  Mon Feb 13 05:10:57 2006
From: mhellwig at xs4all.nl (Martin P. Hellwig)
Date: Mon, 13 Feb 2006 11:10:57 +0100
Subject: by reference
In-Reply-To: <1139789393.053912.15310@g14g2000cwa.googlegroups.com>
References: <mailman.1681.1139517426.27775.python-list@python.org>
	<1139598954.259297.74290@o13g2000cwo.googlegroups.com>
	<43ef1edd$0$4165$636a55ce@news.free.fr>
	<1139789393.053912.15310@g14g2000cwa.googlegroups.com>
Message-ID: <43f05b31$0$11063$e4fe514c@news.xs4all.nl>

dirvine wrote:
> Yes I did
> 
> I was trying to do something like (pseudo code)
> 
> write:
> get files in path
> for each filename get size, type
> create dic called filename assign size:xx,type:y
> pickle to file
> 
> read:
> open pickled file
> read dict name and contents (hoping unpickling file gives me the dict
> name as it was saved, which may not be true)
> do stuff with file
> 
> 
> and thats it. My prog is a bit more complex than this but this is the
> general idea basically read files -> create dicts of files one at a
> time, very similar to bittorrent in that take a file smash to bits and
> store links to bits in a big file.
> 
> Many thanls
> David
> 

Well, although I still think you should use nested dicts doesn't say 
that what you want isn't possible, take a look at this snippet:
 >>> locals()['test']=dict()
 >>> test
{}
 >>>
It looks quite ugly too me but that is probably in the eye of the 
beholder. However even the faq has some info on that:
http://www.python.org/doc/faq/programming.html#how-do-i-use-strings-to-call-functions-methods

-- 
mph


From donn at u.washington.edu  Mon Feb 13 15:01:24 2006
From: donn at u.washington.edu (Donn Cave)
Date: Mon, 13 Feb 2006 12:01:24 -0800
Subject: Jython socket typecasting problems
References: <1139678202.221563.308700@f14g2000cwb.googlegroups.com>
	<456l92F554abU1@uni-berlin.de>
	<mailman.1803.1139803276.27775.python-list@python.org>
	<1139857815.855155.58400@g43g2000cwa.googlegroups.com>
Message-ID: <donn-DAA22A.12012413022006@gnus01.u.washington.edu>

In article <1139857815.855155.58400 at g43g2000cwa.googlegroups.com>,
 "Mark Fink" <mark at mark-fink.de> wrote:
> thanks to the help of this group I moved a tiny step forward. Obviously
> it is not possible to resolve name localhost:
> Type "copyright", "credits" or "license" for more information.
> >>> import socket
> >>> s=socket.socket(socket.AF_INET, socket.SOCK_STREAM)

> >>> s.connect((localhost, 8080))
> Traceback (innermost last):
>   File "<console>", line 1, in ?
> NameError: localhost

Did you mean to put 'localhost' in quotes?

> >>> s.connect(('127.0.0.1', 8080))
> Traceback (innermost last):
>   File "<console>", line 1, in ?
>   File "D:\AUT_TEST\Jython21\Lib\socket.py", line 135, in connect
> java.net.ConnectException: Connection refused: connect

> Unfortunately this is not the solution (I tried 127.0.0.1 before my
> first post).

It does seem to be the solution to the problem you asked
about, since you don't get a type error here.  The problem
you report now is quite different.  There is no obvious
problem with the Python code, this time - it just depends
on what you're trying to do.

> I added the two print lines as recommended:
>         self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>         print type(self.host), repr(self.host)
>         print type(self.port), repr(self.port)
>         self.socket.connect((self.host, self.port))
>         self.socketOutput = self.socket.getOutputStream()
> 
> And more specific information:
> D:\AUT_TEST\workspace\JyFIT\fit>jython JyFitServer2.py 127.0.0.1 1234
> 12
> ['JyFitServer2.py', '127.0.0.1', '1234', '12']
> 127.0.0.1
> org.python.core.PyString '127.0.0.1'
> org.python.core.PyString '1234'
> Traceback (innermost last):
>   File "JyFitServer2.py", line 148, in ?
>   File "JyFitServer2.py", line 31, in run
>   File "JyFitServer2.py", line 98, in establishConnection
>   File "D:\AUT_TEST\Jython21\Lib\socket.py", line 135, in connect
> TypeError: java.net.Socket(): 1st arg can't be coerced to
> java.net.InetAddress or String
> 
> No casting from string to string?? I learned that there is no such
> thing as explicit typecasting. What to do?

If I understand what you're doing there, it seems to
confirm that when this socket implementation encounters
an error in a network address, during connect(), it
raises a type error.  The thing to do, therefore, is
expect TypeError, where in C Python you would expect
a socket.gaierror or socket.error (in older versions)
exception.

   Donn Cave, donn at u.washington.edu


From didier.prophete at gmail.com  Tue Feb  7 02:29:37 2006
From: didier.prophete at gmail.com (didier.prophete at gmail.com)
Date: 6 Feb 2006 23:29:37 -0800
Subject: jython problem importing a py file
Message-ID: <1139297376.961785.146760@g43g2000cwa.googlegroups.com>

Ok, so I know this is probably a common jython error, but somehow I
can't seem to find an answer to this trivial problem.

Ok, I have the following (simple) directory structure:
$TOP/
    __init__.py
    py_dir/
        __init__.py
        util.py

I have:
  PYTHONPATH=$TOP
  CLASSPATH=$TOP

I am now trying to execute the simple python/jython statement: "import
py_dir.util"
If I do a 'cd $TOP' first, then this works fine in python and jython.

But if I do a 'cd $TOP/py_dir', then it still works fine in python, but
jython gives me:
    Traceback (innermost last):
       File "<console>", line 1, in ?
    ImportError: No module named util

I tried everything I could think of (playing with the __init__.py, the
PYTHONCLASS, the CLASSPATH), but nothing seems to work...

I am doing something wrong here ? 

-Didier



From dylan.moreland at gmail.com  Thu Feb  9 02:24:06 2006
From: dylan.moreland at gmail.com (Dylan Moreland)
Date: 8 Feb 2006 23:24:06 -0800
Subject: how to remove <BR> using replace function?
In-Reply-To: <1139465695.997171.159150@g44g2000cwa.googlegroups.com>
References: <1139462640.951603.302830@g44g2000cwa.googlegroups.com>
	<1139464079.635612.289930@o13g2000cwo.googlegroups.com>
	<1139465695.997171.159150@g44g2000cwa.googlegroups.com>
Message-ID: <1139469846.713121.219060@g47g2000cwa.googlegroups.com>


localpricemaps at gmail.com wrote:
> nope didn't work

Could you be more specific about the error? Both my example and yours
work perfectly on my box.



From aleaxit at yahoo.com  Sun Feb 26 15:13:01 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 26 Feb 2006 12:13:01 -0800
Subject: An isalpha() that accepts underscores as well
References: <1140875695.053987.158710@t39g2000cwt.googlegroups.com>
	<cone.1140889811.930498.40672.5001@35st-server.simplicato.com>
	<mailman.2449.1140979860.27775.python-list@python.org>
	<87bqwtor98.fsf@yandex.ru>
	<1140982340.006483.245000@e56g2000cwe.googlegroups.com>
	<877j7hoqeu.fsf@yandex.ru>
Message-ID: <1hbd8jv.azl9pf1icjejkN%aleaxit@yahoo.com>

Zajcev Evgeny <zevlg at yandex.ru> wrote:
   ...
> > The following will work, and probably only be twice as slow as
> > 'isalpha'  :-) :
> >
> > def alfa(w):
> >    return w.replace('_', '').isalpha()
> 
> Yeah, great performance indeed, thanks!

Except it rejects a w that's JUST an underscore, while it would accept a
w that's just a letter, which seems weird to me.  Using 'a' as the
second argument of the replace call, as somebody else suggested, appears
to produce a more sensible uniformity.


Alex


From andre.roberge at gmail.com  Sun Feb 26 09:59:05 2006
From: andre.roberge at gmail.com (=?iso-8859-1?B?QW5kcuk=?=)
Date: 26 Feb 2006 06:59:05 -0800
Subject: Is Python a Zen language?
In-Reply-To: <1140963005.123017.90890@t39g2000cwt.googlegroups.com>
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
	<1140931766.200951.321320@t39g2000cwt.googlegroups.com>
	<1140963005.123017.90890@t39g2000cwt.googlegroups.com>
Message-ID: <1140965945.834501.62940@e56g2000cwe.googlegroups.com>

John Coleman wrote:
> Crutcher wrote:
> > You are a very silly person. You have tripped so many of my internet
> > bullshit triggers that I think perhaps you are trolling. All languages
> > alter the way you think. They structure the nature of questions you can
> > ask, and problems you can solve.
> >
> > Do you understand 'Zen', by which I mean, have you devoted at least 5
> > years of study (real, 5+ hrs/week studdy) to it? (btw, I have not). If
> > your answer is no, then you are just using this to be cool.
> >
> > And if you can say 'no value judgment is intended by my
> > classification', you have absolutely no right to talk about the nature
> > of language, let alone go about labeling things 'Zen languages'.
> > Honestly, classification is an act of valuation, it requires an
> > introspective assesment of your personal language system. This stuff is
> > _old_, not new, not novell.
> >

Wouldn't that be "novel"?   Or, perhaps I should rather ask:
Do you understand 'novell', by which I mean, have you devoted at least
5 years of study (real, 5+ hrs/week study) to it? (btw, I have not...
but I have used Novell software products for longer than that ;-)

> > Go read a book.
> > Like this one: http://www.aber.ac.uk/media/Documents/S4B/the_book.html
>
> If appearing silly is the price of satisfying your curiousity then so
> be it. I would, however, like to point out that there is a well
> established usage of the word "Zen" in computer science.
[snip; excellent answer from John deleted.]
> -John Coleman

If I may add: word and their usage is constantly evolving, sometimes
through mistakes, other times through borrowing from other languages or
disciplines.  (my favourite is the transcription mistake of the word
"collineare" where the hand-written "ne" was transcribed as "m",
leading to the English word "collimate" ... but I digress.)
Some "purist", like the Academie Francaise (or, apparently "Crutcher")
seem to believe that "one" can restrict the meaning of words, or the
evolution of language.  The rest of us are happy to let language
evolution take place to facilitate communication. Kudos to John for his
examples of usage of "zen" and "tao" in computer related disciplines.

Personally, I would say that Python is a zen language, not so much in
the sense that it transforms the way of thinking, but rather as it
doesn't get in the way of thinking.

Andr?



From kent at kentsjohnson.com  Sat Feb 25 10:37:08 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Sat, 25 Feb 2006 10:37:08 -0500
Subject: unicode question
In-Reply-To: <mailman.2420.1140838251.27775.python-list@python.org>
References: <mailman.2420.1140838251.27775.python-list@python.org>
Message-ID: <44007510$1_2@newspeer2.tds.net>

Edward Loper wrote:
> I would like to convert an 8-bit string (i.e., a str) into unicode,
> treating chars \x00-\x7f as ascii, and converting any chars \x80-xff
> into a backslashed escape sequences.  I.e., I want something like this:
> 
>  >>> decode_with_backslashreplace('abc \xff\xe8 def')
> u'abc \\xff\\xe8 def'

  >>> s='abc \xff\xe8 def'
  >>> s.encode('string_escape')
'abc \\xff\\xe8 def'
  >>> unicode(s.encode('string_escape'))
u'abc \\xff\\xe8 def'

Kent


From nyamatongwe+thunder at gmail.com  Sat Feb 11 19:38:22 2006
From: nyamatongwe+thunder at gmail.com (Neil Hodgson)
Date: Sun, 12 Feb 2006 00:38:22 GMT
Subject: How to check...
In-Reply-To: <1139660094.920792.136560@g14g2000cwa.googlegroups.com>
References: <1139660094.920792.136560@g14g2000cwa.googlegroups.com>
Message-ID: <2svHf.5857$yK1.3147@news-server.bigpond.net.au>

    Lad:

 > How can I  check that a string does NOT contain NON English characters?

    It depends on how you define the set of English characters which is 
as much a matter of opinion or authority as fact. The following may be 
regarded as English despite containing 9 (8 unique) non-ASCII characters:
    The ?200 encyclop?dia de?nes the ?co?rdinates? in ? ?ngstr?ms.

    Neil


From nospamformeSVP at gmail.com  Thu Feb 23 17:03:19 2006
From: nospamformeSVP at gmail.com (Don Taylor)
Date: Thu, 23 Feb 2006 17:03:19 -0500
Subject: PyDev/Eclipse Help
In-Reply-To: <57aa55060602201114p4e59e402x4d7ca58bab68797@mail.gmail.com>
References: <57aa55060602201114p4e59e402x4d7ca58bab68797@mail.gmail.com>
Message-ID: <dtlbfd$bfj$1@sea.gmane.org>

Greg Lindstrom wrote:
> I am running Python 2.4 on Windows XP "Professional" and Eclipse 3.1.  I 
> would like to take a look at PyDev on Eclipse and downloaded the PyDev 
> (1.0.2?) via the Help->SotwareUpdates->FindAndInstall wizard.  Then then 
> go to create a Python Project with File->New->Project and then select 
> Pydev->Pydev Project and get an Error Dialog stating: "The selected 
> wizard could not be started.  Reason: Plug-in org.python.pydev was 
> unable to load class 
> org.python.pydev.ui.wazards.project.PythonProjectWizard."  Can any of 
> you wizards tell me what this means (well, OK, I *know* it means I can't 
> load PythonProjectWizard, but you get my drift, right?).
> 
> Thanks for your help...see yo in Dallas!
> --greg
> 
> 
I don't know the answer, but you might get one from the Pydev forum

http://sourceforge.net/forum/forum.php?forum_id=293649

Don.



From jgardner at jonathangardner.net  Tue Feb 14 20:32:48 2006
From: jgardner at jonathangardner.net (Jonathan Gardner)
Date: 14 Feb 2006 17:32:48 -0800
Subject: Soduku
Message-ID: <1139967167.960780.171360@o13g2000cwo.googlegroups.com>

Here at my job, Python gets no respect.

A programmer here wanted to see which language among Python, Perl, and
Java was better. So he wrote a Python, perl, and Java version. Except
the Python version was 20x slower than the perl and Java versions.

Well, luckily he asked around in our little Python group about what he
did wrong. He simply misindented a block of code, making it run 10x as
often as it needed to. With that one fix, it was running faster than
the Java and perl versions, about 2x as fast. A few other minor tweaks
made it run even faster.

And we've been playing with different algorithms for soduku solutions.
I had it down to 27 ms to solve the puzzle.

So, one more story on why Python is really good. I think, at least with
2.4, we should start bragging about Python's speed. I mean, it beats
Java AND perl!



From plahey at alumni.caltech.edu  Wed Feb  8 10:18:00 2006
From: plahey at alumni.caltech.edu (plahey at alumni.caltech.edu)
Date: 8 Feb 2006 07:18:00 -0800
Subject: 450 Pound Library Program
In-Reply-To: <43e9f1e1$0$612$636a15ce@news.free.fr>
References: <1139351498.090768.82270@o13g2000cwo.googlegroups.com>
	<43e9f1e1$0$612$636a15ce@news.free.fr>
Message-ID: <1139411880.032250.181300@g43g2000cwa.googlegroups.com>

Ok,

I give up. DRY = Don't Repeat Yourself (google Pragmatic Programmers)
but SPOT?  Google is little help here, SPOT is too common a word.

Thanks!



From wheel at wheel.not  Fri Feb 17 23:17:10 2006
From: wheel at wheel.not (wheel)
Date: Fri, 17 Feb 2006 20:17:10 -0800
Subject: Does Plone support distinct sets of users in subgroups?
Message-ID: <MPG.1e603f88182909e0989715@newsgroups.comcast.net>

I'm not sure if this is the right venue for Plone questions, if not, 
could someone ref me to a better one? The discussion groups on the plone 
site are mailing lists and I'd rather not subscribe quite yet.

Does plone support distinct sets of users? That is, on a public website 
running plone, can it be configured such that when a user logs in they 
are allowed access to a subgroup's main page, get the subgroup's 
newsletter as well as the main site's newsletter etc? So, a membership 
account on the main site would allow entrance into groups they belonged 
to. Everyone, that is each subgroup, would have access to the same set 
of features that the main site offers,  but would see their own distinct 
version of each, managed by it's own admins. Say each subgroup had a 
photo gallery and forum, each subgroups would be separate. Ideally a 
membership in subgroup A would not preclude membership in subgroup B. 


From john_sips_teaz at yahooz.com  Fri Feb  3 22:44:37 2006
From: john_sips_teaz at yahooz.com (John M. Gabriele)
Date: Fri, 03 Feb 2006 22:44:37 -0500
Subject: cannot install scipy
In-Reply-To: <1139013871.122256.202130@g43g2000cwa.googlegroups.com>
References: <1139013871.122256.202130@g43g2000cwa.googlegroups.com>
Message-ID: <UsVEf.7441$MF1.4622@fe08.lga>

nitro wrote:
> Hi,
> 
> I am using a Debian system. I installed NumPy and everything works
> well. When I try to install SciPy, I get the following error. Any help
> would be appreciated.
> 
> ===
> idf at server1:~/scipy/scipy-0.4.4$ python setup.py install
> import core -> failed:
> /usr/lib/python2.3/site-packages/numpy/core/multiarray.so: undefined
> symbol: PyOS_ascii_strtod
> import random -> failed: 'module' object has no attribute 'dtype'
> import lib -> failed:
> /usr/lib/python2.3/site-packages/numpy/core/multiarray.so: undefined
> symbol: PyOS_ascii_strtod
> Fatal Python error: can't initialize module lapack_lite
> Aborted
> idf at server1:~/scipy/scipy-0.4.4$
> ===
> 
> nitro
> 

Why not just "apt-get install python-scipy"?

That's one of the best parts of running Debian. :)

---J

-- 
(remove zeez if demunging email address)


From zefria at gmail.com  Mon Feb 20 04:14:20 2006
From: zefria at gmail.com (Zefria)
Date: 20 Feb 2006 01:14:20 -0800
Subject: Quesion about the proper use of __slots__
In-Reply-To: <43f9825e$0$4777$636a55ce@news.free.fr>
References: <1140424508.393412.79140@o13g2000cwo.googlegroups.com>
	<43f9825e$0$4777$636a55ce@news.free.fr>
Message-ID: <1140426860.033363.237150@o13g2000cwo.googlegroups.com>

>>> class Fighter(object):
...     '''Small one man craft that can only harm other fighters on
their own.'''
...     __slots__ = ["fuel","life","armor","weapon","bulk"]
...     def __init__(self,statsTuple=(50,5,0,(2,4),1)):
...             self.fuel = statsTuple[0]
...             self.life = statsTuple[1]
...             self.armor = statsTuple[2]
...             self.weapon = statsTuple[3]
...             self.bulk = statsTuple[4]
...
>>> examp = Fighter()
>>> examp.rock = 3
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'Fighter' object has no attribute 'rock'
>>>

Thank you both, I had tried making it a class variable and didn't see
anything. The trick must have been in making a class that inheriets
from object.

Also, I don't generally do any optimization at all yet (as a highschool
student projects get trashed often enough no to bother over), but in
this special case I'm expecting each "carrier" to have up to 150
fighters, and 3 to 5 carriers for each of the two teams, which comes
out to be quite large.

Additionally, this program's purpose was to experiment with as many of
the special methods as possible, so I suppose I'm on track so far.



From g.brandl-nospam at gmx.net  Fri Feb 17 14:59:29 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Fri, 17 Feb 2006 20:59:29 +0100
Subject: Another stupid newbie question
In-Reply-To: <1140205868.660418.234980@z14g2000cwz.googlegroups.com>
References: <1140203709.145048.314180@g43g2000cwa.googlegroups.com>
	<mailman.2065.1140204717.27775.python-list@python.org>
	<1140205868.660418.234980@z14g2000cwz.googlegroups.com>
Message-ID: <45mo91F7h0m6U1@individual.net>

Byte wrote:
> Great, thanks all. Now, how come
> 
>         if x == mx: print x
>                     break
> 
> Dosnt work?

If you have a suite with more than one line, you must put it on a new line.

if x == mx:
    print x
    break

Perhaps it would be good for you to work through the Python Tutorial.

Georg


From http  Wed Feb  1 21:28:22 2006
From: http (Paul Rubin)
Date: 01 Feb 2006 18:28:22 -0800
Subject: cgi - secure sessions
References: <1138842390.012855.107610@g44g2000cwa.googlegroups.com>
	<7x8xsuczxz.fsf@ruckus.brouhaha.com>
	<1138844380.094365.223840@g44g2000cwa.googlegroups.com>
	<7xzmlabk8s.fsf@ruckus.brouhaha.com>
	<1138845674.984726.219010@g49g2000cwa.googlegroups.com>
Message-ID: <7xhd7i335l.fsf@ruckus.brouhaha.com>

"GazaM" <infini.g at gmail.com> writes:
> Paul: By server side include I mean simply calling upon the script from
> an include line within the html, for example '<!--#include
> virtual="/cgi-bin/cookietest.cgi" -->'

Try printing the contents of os.getenv() in your script and see
if the cookie data is in there.


From nnorwitz at gmail.com  Mon Feb 13 02:38:20 2006
From: nnorwitz at gmail.com (nnorwitz at gmail.com)
Date: 12 Feb 2006 23:38:20 -0800
Subject: how do you pronounce 'tuple'?
In-Reply-To: <11v032ii4gvik72@corp.supernews.com>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<11v032ii4gvik72@corp.supernews.com>
Message-ID: <1139816300.706181.79250@f14g2000cwb.googlegroups.com>

Grant Edwards wrote:
> On 2006-02-13, John Salerno <johnjsal at NOSPAMgmail.com> wrote:
>
> > I know it comes from the suffix -tuple, which makes me think
> > it's pronounced as 'toople', but I've seen (at m-w.com) that
> > the first pronunciation option is 'tuhple', so I wasn't sure.
> > Maybe it's both, but which is most prevalent?
>
> In my expereince, the latter.  I don't think I've ever heard
> the other pronounciation.

I used to pronounce it toople.  But the people that taught me Python
found it both comical and confusing.  At first they thought I meant a 2
element tuple.  So they wondered if a 3 element tuple was a threeple,
etc.  After much harrassing, I changed my wayward ways and pronounced
it tuhple to fit in with the cool Python guys. ;-)

Then we went to hear Guido speak about Python 2.2 at a ZPUG meeting in
Washington, DC.  When he said toople I almost fell out of my chair
laughing, particularly because the people who taught me to say it the
"right" way were with me.  When I looked over, they just hung their
head in shame.

I work with Guido now and I'm conflicted.  I'm still conditioned to say
tuhple.  Whenever he says toople, I just get a smile on my face.  I
think most of the PythonLabs guys pronounce it toople.

n



From ptmcg at austin.rr.com  Sat Feb 18 19:48:38 2006
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 18 Feb 2006 16:48:38 -0800
Subject: Multiplication optimization
Message-ID: <1140310118.365847.111120@g14g2000cwa.googlegroups.com>

Does Python's run-time do any optimization of multiplication
operations, like it does for boolean short-cutting?  That is, for a
product a*b, is there any shortcutting of (potentially expensive)
multiplication operations as in:

    if a == 0
        return 0
    if a == 1
        return b
    return a*b

Of course, for the cases where a is not 0 or 1 we are adding two
comparisons to each multiply operation.  But in some applications
(sparse matrices? binary conversion?), the multiplication step could be
avoided in many cases, if the user was aware that left-to-right
short-cutting were implemented.

Or by adding two *more* comparisons, then all multiplications would be
"optimized":

    if a == 0 or b == 0
        return 0
    if a == 1
        return b
    if b == 1
        return a
    return a*b

But this seems overkill, especially since boolean short-cutting only
works left-to-right.

Just curious...

-- Paul



From ZeD.est.Deus at gmail.com  Thu Feb  9 07:57:19 2006
From: ZeD.est.Deus at gmail.com (ZeD)
Date: Thu, 09 Feb 2006 12:57:19 GMT
Subject: line wrapping problem
References: <1139484488.037165.106170@g43g2000cwa.googlegroups.com>
	<dsfbr4$426$1@oravannahka.helsinki.fi>
Message-ID: <P_GGf.86290$eD5.1437972@twister2.libero.it>

Ciao, Juho Schultz! Che stavi dicendo?

> should work. IMO file.write() is self-explanatory but "print >> file" is
> a bit obscure.

is obscure only if you have never used a shell :)

-- 
Evangelion e' la storia yaoi di un angelo che vuole portarsi a letto un
ragazzo che si intreccia con la storia di un maturo professionista con il
complesso delle lolite... fatte in casa.
                                                            -- Lennier, 2006



From aleaxit at yahoo.com  Sun Feb 19 18:24:04 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 19 Feb 2006 15:24:04 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
Message-ID: <1hb0iek.1id1adzqeiw6yN%aleaxit@yahoo.com>

Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote:
   ...
> Ho, really ? How many applications using Python as scripting language ?

http://wiki.python.org/moin/AppsWithPythonScripting lists many, but it's
obviously woefully incomplete -- e.g., it's missing Civilization IV, a
very popular, major new game whose use of Python has been in the news a
lot.  Besides, with ActiveScripting on Windows and Apple Events on the
Mac, all normal applications on both widespread platforms are "using
Python as scripting language", at least potentially -- that makes it
essentially a desperate task to try to count them all...:-(


Alex




From theller at python.net  Mon Feb 13 11:59:23 2006
From: theller at python.net (Thomas Heller)
Date: Mon, 13 Feb 2006 17:59:23 +0100
Subject: Arcane deployment considerations
In-Reply-To: <amk6c3-5ju.ln1@lairds.us>
References: <daadb$43ee6b05$4275d90a$28181@FUSE.NET>	<43EE7C2A.3040102@v.loewis.de>	<mailman.1794.1139778796.27775.python-list@python.org>
	<amk6c3-5ju.ln1@lairds.us>
Message-ID: <dsqdu8$46l$1@sea.gmane.org>

Cameron Laird wrote:
> In article <mailman.1794.1139778796.27775.python-list at python.org>,
> Thomas Heller  <theller at python.net> wrote:
> 			.
> 			.
> 			.
>> Usually the bundle=1 option in py2exe can create a single file exe, but it also
>> allows to have a separate shared library.zip file, which is useful if
>> you need more than
>> one exe-file.  With python 2.4, MSVCR71.dll is still required and not
> 			.
> 			.
> 			.
> For some of our projects, we provide a single executable, which
> takes a command-line argument (or, rarely, environment variable)
> to tell the executable whether to come up as server or client,
> or GUI or command-line version, or ...  The result is that, even
> for an architecturally-sophisticated development, the end-user
> experiences a unitary delivery; he has just one file to install,
> remove, archive, ...  

Ok, so you're down to about 0.2 files per application ;-)

Thomas



From cvanarsdall at mvista.com  Tue Feb  7 13:43:25 2006
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Tue, 07 Feb 2006 10:43:25 -0800
Subject: Object Oriented vs Pythonic Code, and Pythonic standards
Message-ID: <43E8EA4D.9020602@mvista.com>

It seems the more I come to learn about Python as a langauge and the way 
its used I've come across several discussions where people discuss how 
to do things using an OO model and then how to design software in a more 
"Pythonic" way.

My question is, should we as python developers be trying to write code 
that follows more of a python standard or should we try to spend our 
efforts to stick to a more traditional OO model? 

For example, in C++ I might make a file that defines a class and all its 
methods, at which point I create an object and do things with it.  My 
interpretation of what is "Pythonic" would be instead of creating a 
class I would just define functions and maybe some variables global to a 
module.  At this point, I import the module and just make function calls.

There are many similarities here, but the difference is that in python I 
don't feel as though I would define a class, I would just treat the 
python module as a class instead, especially if it was a type of object 
that I would only need a single instance of.

The second question that arises from Pythonism is, has the community 
drafted a standard for quality "Pythonic" code?

Thanks,

carl



-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From iainking at gmail.com  Wed Feb 15 04:15:59 2006
From: iainking at gmail.com (Iain King)
Date: 15 Feb 2006 01:15:59 -0800
Subject: Self-identifying functions and macro-ish behavior
In-Reply-To: <1139989639.323304.239680@g43g2000cwa.googlegroups.com>
References: <1139989639.323304.239680@g43g2000cwa.googlegroups.com>
Message-ID: <1139994959.051610.303180@f14g2000cwb.googlegroups.com>


63q2o4i02 at sneakemail.com wrote:
> Hi, I was wondering how I may get a python function to know what its
> name is without me having to write it manually?  For example:
>
> def func1():
>     <do some stuff1>
>     print 'func1'
>     return True
>
> def func2():
>     <do some stuff2>
>     print 'func2'
>     return True
>
> should be more like
> def func1():
>     <do some stuff 1>
>     print <self-name>
>     return True
>
> def func2():
>     <do some stuff 2>
>     print <self-name>
>     return True
>
> I imagine this means things like closures which I'm not familiar with
> (I'm not a CS person).  In this case, each function is part of a class,
> so I imagine I can take a dir() of the class if necessary.

Yeah, I think these are closures (though when I learnt CS we didn't get
taught them).  Try this:

def makeFunction(name):
    def func():
        <do stuff>
        print name
        return True
    return func

func1 = makeFunction('func1')
func2 = makeFunction('func2')

>
> This leads into my next related question, which is How do I get some
> sort of macro behavior so I don't have to write the same thing over and
> over again, but which is also not neatly rolled up into a function,
> such as combining the return statements with a printing of <self-name>?

I think I've answered this too?

Iain



From carsten at uniqsys.com  Mon Feb 13 14:22:22 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 13 Feb 2006 14:22:22 -0500
Subject: trapping errors in function call syntax
In-Reply-To: <m8m1v1h8ae545nsqbl777plviddc94vsdd@4ax.com>
References: <m8m1v1h8ae545nsqbl777plviddc94vsdd@4ax.com>
Message-ID: <1139858542.11014.42.camel@dot.uniqsys.com>

On Mon, 2006-02-13 at 14:13, Avi Kak wrote:
> Hello:
> 
>    Suppose I write a function that I want to be called
>    with ONLY keyword argumnts, how do I raise an
>   exception should the function get called with 
>   what look like position-specfic arguments?
> 
>   Any help would be appreciated.

Something like this should do the trick:

def f(*args, **kwargs):
  if args: raise TypeError, "Please use keyword arguments."
  ...

-Carsten




From will at willmcgugan.com  Mon Feb  6 08:11:04 2006
From: will at willmcgugan.com (Will McGugan)
Date: 6 Feb 2006 05:11:04 -0800
Subject: Question about idioms for clearing a list
References: <mailman.1294.1138727665.27775.python-list@python.org>
Message-ID: <1139231464.914400.37100@g44g2000cwa.googlegroups.com>

Steven Watanabe wrote:
> I know that the standard idioms for clearing a list are:
>
>   (1) mylist[:] = []
>   (2) del mylist[:]
>
> I guess I'm not in the "slicing frame of mind", as someone put it, but
> can someone explain what the difference is between these and:
>
>   (3) mylist = []
>
> Why are (1) and (2) preferred? I think the first two are changing the
> list in-place, but why is that better? Isn't the end result the same?

I'm wondering why there is no 'clear' for lists. It feels like a common
operation for mutable containers. :-/


Will McGugan



From Dennis.Benzinger at gmx.net  Wed Feb 15 18:08:18 2006
From: Dennis.Benzinger at gmx.net (Dennis Benzinger)
Date: Thu, 16 Feb 2006 00:08:18 +0100
Subject: apache mod_python problem
In-Reply-To: <1140042611.557816.247140@g14g2000cwa.googlegroups.com>
References: <1140042611.557816.247140@g14g2000cwa.googlegroups.com>
Message-ID: <43f3b460$1@news.uni-ulm.de>

Ido Yehieli schrieb:
> [...]
> Anyone has any idea as to what went wrong?
> [...]

If you compiled mod_python as a Dynamic Shared Object (DSO) you have to 
tell Apache to load that module. For example like this:

LoadModule python_module libexec/mod_python.so

See the mod_python documentation, especially the Configuring Apache section:

http://modpython.org/live/current/doc-html/inst-apacheconfig.html

Bye,
Dennis


From paul at boddie.org.uk  Tue Feb 21 03:36:33 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 21 Feb 2006 00:36:33 -0800
Subject: Safe Python Execution
References: <1haudyd.10d1fd6nn4pqhN%aleaxit@yahoo.com>
	<mailman.2020.1140111870.27775.python-list@python.org>
	<1140116270.222360.134430@z14g2000cwz.googlegroups.com>
	<1140504598.018118.166780@f14g2000cwb.googlegroups.com>
Message-ID: <1140510993.432505.211600@g43g2000cwa.googlegroups.com>

dbpokorny at gmail.com wrote:
>
> Is anyone aware of a more functional but still untrusted python?

Given that you've looked into Zope 3's security/proxy mechanisms, have
you also looked at mxProxy?

http://www.egenix.com/files/python/mxProxy.html

Paul



From wanghz at gmail.com  Sun Feb 12 13:54:03 2006
From: wanghz at gmail.com (wanghz at gmail.com)
Date: 12 Feb 2006 10:54:03 -0800
Subject: Can I get the 8bit-string representation of any unicode string
In-Reply-To: <mailman.1784.1139761874.27775.python-list@python.org>
References: <1139757073.364694.176200@g14g2000cwa.googlegroups.com>
	<1139760950.777963.245250@g47g2000cwa.googlegroups.com>
	<mailman.1784.1139761874.27775.python-list@python.org>
Message-ID: <1139770442.967758.48210@f14g2000cwb.googlegroups.com>

Hi,

I see.  Thank you for your help!


Regards,
hongzheng

Fredrik Lundh wrote:
> wanghz at gmail.com wrote
>
> > I may misunderstood it.  I will think about it carefully.
> >
> > By the way, does python has a interface, just like iconv in libc for
> > C/C++?  Or, how can I convert a string from a encoding into another
> > one?
>
> if b is an 8-bit string containing an encoded unicode string,
>
>     u = b.decode(encoding)
>
> or
>
>     u = unicode(b, encoding)
>
> gives you a unicode string.  to encode the unicode string back to another
> byte string, use the encode method.
> 
>     b = u.encode(encoding)
> 
> </F>



From zhangchao19 at hotmail.com  Fri Feb 24 02:43:13 2006
From: zhangchao19 at hotmail.com (cn.popeye)
Date: Fri, 24 Feb 2006 15:43:13 +0800
Subject: 'rar' is not recognized as an internal or external command£¿£¿£¿£¿
References: <dtjv4r$ma1$1@news.cn99.com> <dtm1m0$1eq$1@news.cn99.com>
	<2n6tv1h0hgdp3ajua4vb9eaipv3pccf9p0@4ax.com>
Message-ID: <dtmeq5$fam$1@news.cn99.com>

 os.chdir() ?
thank you!

-- 
????
"Dennis Lee Bieber" <wlfraed at ix.netcom.com> ????
news:2n6tv1h0hgdp3ajua4vb9eaipv3pccf9p0 at 4ax.com...
> On Fri, 24 Feb 2006 11:36:08 +0800, "????????" <zhangchao19 at hotmail.com>
> declaimed the following in comp.lang.python:
>
> > thank everyone!!!
> >
> I'd had to run to work so couldn't test, but... notice this:
>
>
> C:\Documents and Settings\Dennis Lee Bieber>python
> ActivePython 2.3.5 Build 236 (ActiveState Corp.) based on
> Python 2.3.5 (#62, Feb  9 2005, 16:17:08) [MSC v.1200 32 bit (Intel)] on
> win32
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import os
> >>> os.system("dir /w")
>  Volume in drive C is System
>  Volume Serial Number is 0487-A514
>
>  Directory of C:\Documents and Settings\Dennis Lee Bieber
>
> [.]                            [..]                           [.eclipse]
> [.gps]                         [.mysqlcc] [.netbeans]
> [.refactorit]                  [.refactorit_please_delete_me]
> [Application Data]
> [Desktop]                      Eudora.lnk [Favorites]
> [Start Menu]                   [workspace]
>                1 File(s)            820 bytes
>               13 Dir(s)  22,481,092,608 bytes free
> 0
> >>> os.system("cd e:\\userdata")
> 0
> >>> os.system("dir /w")
>  Volume in drive C is System
>  Volume Serial Number is 0487-A514
>
>  Directory of C:\Documents and Settings\Dennis Lee Bieber
>
> [.]                            [..]                           [.eclipse]
> [.gps]                         [.mysqlcc] [.netbeans]
> [.refactorit]                  [.refactorit_please_delete_me]
> [Application Data]
> [Desktop]                      Eudora.lnk [Favorites]
> [Start Menu]                   [workspace]
>                1 File(s)            820 bytes
>               13 Dir(s)  22,481,092,608 bytes free
> 0
> >>> os.chdir("e:\\userdata")
> >>> os.system("dir /w")
>  Volume in drive E is Data
>  Volume Serial Number is 2626-D991
>
>  Directory of e:\userdata
>
> [.]                 [..]                [Dennis Lee Bieber]
> DummyQuicken.IDX
> DummyQuicken.QDF    DummyQuicken.QEL    DummyQuicken.QPH    [Root]
>                4 File(s)        316,184 bytes
>                4 Dir(s)  307,433,058,304 bytes free
> 0
> >>>
>
> Notice how using os.system() to do a "cd" doesn't "stick"... But if
> you used os.chdir() instead, THAT setting carries over to subsequent
> os.system() calls.
>
> -- 
>  > ============================================================== <
>  >   wlfraed at ix.netcom.com  | Wulfraed  Dennis Lee Bieber  KD6MOG <
>  >      wulfraed at dm.net     |       Bestiaria Support Staff       <
>  > ============================================================== <
>  >           Home Page: <http://www.dm.net/~wulfraed/>            <
>  >        Overflow Page: <http://wlfraed.home.netcom.com/>        <




From samslists at gmail.com  Tue Feb 21 13:55:58 2006
From: samslists at gmail.com (samslists at gmail.com)
Date: 21 Feb 2006 10:55:58 -0800
Subject: Writing my own typing monitor program for RSI sufferers...
In-Reply-To: <mailman.2233.1140534020.27775.python-list@python.org>
References: <1140491147.433293.164700@g43g2000cwa.googlegroups.com>
	<17402.37025.170658.197027@montanaro.dyndns.org>
	<558124520602202021x203786b5u552f20b0186e7b05@mail.gmail.com>
	<mailman.2233.1140534020.27775.python-list@python.org>
Message-ID: <1140548158.745499.69030@o13g2000cwo.googlegroups.com>

Well, this is the one part that I have no idea how to do....as far as I
can tell the information simply is not in /proc.  I need a different
method to discover when someone is typing.  That's what I came to the
list for, to get a clue as to how to do that.

Certainly someone has an idea how to detect typing on a usb keyboard
under python....some external library must exist?

Thanks

p.s. Diez...I'll read that over, and will look forward to seeing what
you come up with.  Please email me to let me know......I suspect that
your approach will require kernel modifications.... I don't want to go
down that path.  I'd be okay with it once, cut the last thing I want to
do is repatch my ubuntu kernel every time there was a security fix.



From larry.bates at websafe.com  Sat Feb 25 16:32:28 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Sat, 25 Feb 2006 15:32:28 -0600
Subject: Concantenation and string slicing
In-Reply-To: <918tv1l6qarf9psde3318ji8mc7arat4ht@4ax.com>
References: <1140735316.752278.298490@v46g2000cwv.googlegroups.com>
	<43FE4E16.6040304@websafe.com>
	<918tv1l6qarf9psde3318ji8mc7arat4ht@4ax.com>
Message-ID: <4400CCEC.6000604@websafe.com>

Dennis Lee Bieber wrote:
> On Thu, 23 Feb 2006 18:06:46 -0600, Larry Bates
> <larry.bates at websafe.com> declaimed the following in comp.lang.python:
> 
> 
>> Better was is:
>>
>> message = raw_input("Enter a message:  ")
>> print message[::-1]
>>
> 
> 	I sometimes get the feeling a lot of responses to newbies, lately,
> fail to explain what was wrong in the original code in favor of showing
> off the tricks that Python is capable of...

Several others had already pointed out what was wrong (which
of course the OP would have know if he had done a tutorial).
I merely wanted to post a solution that IMHO was a much
better way to accomplish the task.  The OP is free to choose
among the posted solutions.  If others had not yet posted the
solution, I would have posted both.

-Larry Bates


From scott.daniels at acm.org  Wed Feb 22 12:38:42 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Wed, 22 Feb 2006 09:38:42 -0800
Subject: except clause not catching IndexError
In-Reply-To: <dti4d8$lmn$1@mailhub227.itcs.purdue.edu>
References: <dti4d8$lmn$1@mailhub227.itcs.purdue.edu>
Message-ID: <43fca009$1@nntp0.pdx.net>

Derek Schuff wrote:
> I have some code like this:
         <code nobody else can run>

> However, when I run it, it seems that I'm not catching the IndexError:
> Traceback (most recent call last):
>   File "/home/dschuff/bin/speeds.py", line 202, in ?
>     if int(toks[2],16) == qaddrs[i]+0x1000 and toks[0] == "200": #producer
> write
> IndexError: list index out of range

This was good, the actual error; I suspect you overwrote IndexError.
The general principal is to boil down your code to the smallest code
that exhibits the problem.  This is not just to aid us, since usually
at some point you delete a block of lines and the problem goes
magically away.

> If i change the except IndexError to except Exception, it will catch it (but
> i believe it's still an IndexError). This is python 2.3 on Debian sarge.
More points for identifying Python version and OS.

> any ideas?
As above, but to test my theory:

...
     except Exception, e:
         print 'caught %r: %r (IndexError is %r)' % (
                      e, e.__class__, IndexError)

--Scott David Daniels
scott.daniels at acm.org


From wolfgang.keller.nospam at gmx.de  Sat Feb  4 14:16:43 2006
From: wolfgang.keller.nospam at gmx.de (Wolfgang Keller)
Date: Sat, 4 Feb 2006 20:16:43 +0100
Subject: Generators vs. Functions?
Message-ID: <0001HW.C00ABC2B000323A6F0335550@news.individual.de>

Hello,

in <dr86uc$8kt$1 at wake.carmen.se>, Magnus Lycka <lycka at carmen.se> posts the 
result of a short test that seems to indicate that resuming a generator takes 
more time than calling a function.

If this is actually also true in the general case, and not due to eventual 
non-representativeness of the test mentioned above, is it simply due to a 
less-than-optimum implementation of generators in the current Pyython 
interpreter and thus likely to change in the future or is this a matter of 
principle and will consequently remain like this forever?

TIA,

Sincerely,

Wolfgang Keller



From mac at calmar.ws  Tue Feb 14 05:37:32 2006
From: mac at calmar.ws (calmar)
Date: Tue, 14 Feb 2006 11:37:32 +0100
Subject: get output of cmd-line command under MS windows
References: <slrndujm8k.2uf.mac@news.calmar.ws>
	<mailman.1598.1139411970.27775.python-list@python.org>
Message-ID: <slrndv3cnc.8tt.mac@news.calmar.ws>

On 2006-02-08, Bernard Lebel <3dbernard at gmail.com> wrote:

Hi Bernhard,

> You should give a go to os.popen( <system command here> ). Article
> 6.1.2 and 6.1.3 in the Python Library doc.
>

that was good, but on python2.4

subprocess is GREAT! e.g.:

    pipe = subprocess.Popen(tot, stdout=subprocess.PIPE,\
            stderr=subprocess.PIPE, shell=False)
    message = pipe.stdout.read()
    error = pipe.stderr.read()

thanks all,
calmar

-- 
  calmar

          (o_  It rocks: LINUX + Command-Line-Interface
          //\
          V_/_                     http://www.calmar.ws


From jcarlson at uci.edu  Thu Feb  2 11:00:48 2006
From: jcarlson at uci.edu (Josiah Carlson)
Date: Thu, 02 Feb 2006 08:00:48 -0800
Subject: [wxPython-users] Problem in threading
In-Reply-To: <fc5d4c490602020623j1d26d4c5x@mail.gmail.com>
References: <fc5d4c490602020623j1d26d4c5x@mail.gmail.com>
Message-ID: <20060202075431.10C1.JCARLSON@uci.edu>


My response is at the end.

Sbaush <sbaush at gmail.com> wrote:
> Hi all.
> I've a problem with thread in python.
> My applications has a GUI that has some button.
> I've a MVC-like architecture.
> If i click on a button there is this effect:
> 
> view.button_1_delete.Bind(EVT_BUTTON,self.OnDelete)
> view.button_1_list.Bind(EVT_BUTTON,self.OnList)
> 
> def OnDelete(self, evt):
>         self.presenter.updateModel("delete")
> def OnList(self, evt):
>         self.presenter.updateModel("list")
> 
> Probably you image that the boss of this program is updateModel function.
> this function has this code:
> 
> def updateModel(self,Type):
>         iptType=Type
>         self.readGUI(iptType)  # This function takes the request info from
> GUI
>         packet=self.ipt_writeXML(iptType) # Put info in XML string
>         self.sender.send(packet) #Send the XML string
>         (xmlresponse,hostfrom)=self.receiver.receive() # Receive a XML
> string response from agent and the IP of agent
>         self.iptResponse.run(xmlresponse,hostfrom) # view response in a
> separate view.
> 
> Now it works great, but there is a big problem: my app wait for response
> before allow user to do another request.
> I thought that with threads it could works perfectly.
> I tried to apply threads but without any good result.
> Have you idea how can i do it and how can i apply thread to it?

import wx
import wx.lib.newevent
import threading

ResponseEvent, EVT_RESPONSE = wx.lib.newevent.NewEvent()

...
    def __init__(self, ...):
        ...
        self.Bind(EVT_RESPONSE, self.GotResponse, self)
        ...

    def _updateModel(self, Type):
        iptType=Type
        self.readGUI(iptType)
        packet=self.ipt_writeXML(iptType)
        self.sender.send(packet)
        (xmlresponse,hostfrom)=self.receiver.receive()
        wx.PostEvent(self,
             ResponseEvent(xml=xmlresponse,
                           host=hostfrom))

    def updateModel(self, Type):
        threading.Thread(target=self._updateModel,
                          args=(Type,)).start()

    def GotResponse(self, evt):
        self.iptResponse.run(evt.xml, xml.host)
    ...


 - Josiah



From deets at nospam.web.de  Thu Feb  2 17:02:35 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 02 Feb 2006 23:02:35 +0100
Subject: PyQt: QListView how to retrieve selected items?
In-Reply-To: <1138916365.766264.152280@z14g2000cwz.googlegroups.com>
References: <1138907537.417067.228570@z14g2000cwz.googlegroups.com>
	<44f50sF1u9c3U1@uni-berlin.de>
	<1138916365.766264.152280@z14g2000cwz.googlegroups.com>
Message-ID: <44fdrsF1tinnU1@uni-berlin.de>

Flavio schrieb:
> Iterating over the items and checking if it is selected, sounds like a
> good idea, but there no obvious way to get a hold of the list of
> items!! The only way you  can get an item is if you are in single
> selection mode and you call selectedItem(). But I have to use multiple
> selection mode, for which this method does not work (it says so in the
> docs)

Who has created these items? Obviously you, so you _can_ store the list 
of selected items.

Or you use the equally well documented QListViewItemIterator to traverse 
the list of items.


regards,

Diez


From felipe.lessa at gmail.com  Thu Feb 23 19:12:56 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Thu, 23 Feb 2006 21:12:56 -0300
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <dtl9ad$35h$1@sea.gmane.org>
References: <dtl9ad$35h$1@sea.gmane.org>
Message-ID: <1140739976.7912.0.camel@kenshin>

Em Qui, 2006-02-23 ?s 15:26 -0600, Paul Probert escreveu:
>    My app runs in a loop looking for changes in a database, and like a 
> good boy I call time.sleep(1) inside the loop. Unfortunately this 
> sometimes runs for 200 seconds or so, presumably while my OS is calling 
> Bill Gates to tell him what I've been doing. This happens under NT4, 
> W2k, and XP. What do people do to fix this? Thanks!

What about the interpreter? Have you tried sleeping there?

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From felipe.lessa at gmail.com  Mon Feb 27 04:58:08 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Mon, 27 Feb 2006 06:58:08 -0300
Subject: PEP 354: Enumerations in Python
In-Reply-To: <7xzmkdxkce.fsf@ruckus.brouhaha.com>
References: <87accdplbj.fsf@rose.polar.local>
	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>
	<4402AB7F.7070804@REMOVEMEcyber.com.au>
	<7xzmkdxkce.fsf@ruckus.brouhaha.com>
Message-ID: <1141034289.3976.2.camel@kenshin>

Em Seg, 2006-02-27 ?s 00:43 -0800, Paul Rubin escreveu:
>     def print_members(header, e):  # print header, then members of enum e
>       print header
>       for m in e:
>         print '\t', str(m)
> 
>     months_longer_than_february = enum('jan', 'mar', 'apr', ) # etc
>     months_shorter_than_february = enum()
> 
>     print_members('shorter:', months_shorter_than_february)
>     print_members('longer:', months_longer_than_february)

IMHO, you should be using sets, not enums. Something like:

def print_members(header, e):
	print header
	from m in e:
		print '\t', str(e)

months = enum('jan', 'fev', 'mar' ...)
months_longer_than_february = frozenset(months.jan, months.mar,
months.apr ...)
months_shorter_than_february = frozenset()

print_members('shorter:', months_shorter_than_february)
print_members('longer:', months_longer_than_february)

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From hancock at anansispaceworks.com  Wed Feb 22 19:24:07 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Wed, 22 Feb 2006 18:24:07 -0600
Subject: ConfigParser and unicode: a simple solution?
In-Reply-To: <43FCE8DD.5060303@niessink.com>
References: <43FCE8DD.5060303@niessink.com>
Message-ID: <20060222182407.1c9628a3@samwise.anansi>

On Wed, 22 Feb 2006 23:42:37 +0100
Frank Niessink <frank at niessink.com> wrote:
> I'm using ConfigParser to read and write simple
> configuration files. 
> 
> However, filenames may not be simple ascii strings, but
> can very well be 
>   unicode strings. 
http://www.google.com/search?hl=en&q=ConfigParser+unicode&btnG=Google+Search

First hit identifies "ConfigObj", and a few links later gets
you the home page and Sourceforge project page:

http://www.voidspace.org.uk/python/configobj.html
http://sourceforge.net/projects/configobj

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From nummertolv at gmail.com  Thu Feb 23 11:49:37 2006
From: nummertolv at gmail.com (nummertolv)
Date: 23 Feb 2006 08:49:37 -0800
Subject: Using repr() with escape sequences
References: <1140708756.484933.13390@z14g2000cwz.googlegroups.com>
	<pan.2006.02.23.15.53.28.462638@REMOVETHIScyber.com.au>
Message-ID: <1140713377.854836.282810@z14g2000cwz.googlegroups.com>

I think I might have misused the terms "escape character" and/or
"escape sequence" or been unclear in some other way because I seem to
have confused you. In any case you don't seem to be addressing my
problem.

I know that the \t in the example path is interpreted as the tab
character (that was part of the point of the example) and what the
strings are representing is irrelevant. And yes, the way the strings
are displayed is part of the issue.

So let me try to be clearer by boiling the problem down to this:

- Consider a string variable containing backslashes.
- One or more of the backslashes are followed by one of the letters
a,b,f,v or a number.

myString = "bar\foo\12foobar"

How do I print this string so that the output is as below?

bar\foo\12foobar

typing 'print myString' prints the following:

bar
oo
foobar

and typing print repr(myString) prints this:

'bar\x0coo\nfoobar'


Hope this makes it clearer. I guess there is a simple solution to this
but I have not been able to find it. Thanks.

/H



From klqmybrq at jkplwbpp.com  Tue Feb  7 04:52:41 2006
From: klqmybrq at jkplwbpp.com (Belgian)
Date: Tue, 07 Feb 2006 09:52:41 GMT
Subject: 45 [XPost] Libero ADSL: Statene alla Larga!!! 454226
Message-ID: <J5_Ff.81811$eD5.1392686@twister2.libero.it>

Wind, Infostrada e Libero vi stanno fregando!

Si lamentano una serie di disservizi con eMule tra cui il blocco della navigazione internet qualora eMule sia funzionante, l'impossibilit? di far funzionare Kademlia, distacchi continui dai server ed2k, velocit? ridicole della linea stessa qualora miracolosamente si riesca a scaricare (e limitazioni a velocit? prossime a quelle di un 56k anche per l'utilizzo di altri p2p).

Tutto questo deriva dall'applicazione di un sistema di limitazione del traffico P2P acquistato dai provider (vedi l'articolo In Italia prove di guerra al P2P su Punto Informatico) che si basa sull'analisi dei pacchetti (Forse questo?).
In particolare da sottolineare le affermazioni di un manager Cisco secondo qui "Si tratta di una piattaforma hardware e software che ? stata applicata per la prima volta in Giappone, con successo, per limitare l'impatto del traffico peer-to-peer. ... Permette ai provider di fare bandwidth shaping, blocking o redirezione di traffico per togliere banda alle applicazioni peer-to-peer e riservarne quindi di pi? ad altri servizi".

Tradotto: gli operatori ADSL vi stanno fregando e noi sappiamo perch?.

Wind stessa ha ammesso l'utilizzo di questa tecnologia su Libero (vedi Un bidone le ADSL 4 Megabit? di PI):
"Da qualche giorno abbiamo attivato un engine che, in caso di traffico elevato, d? priorit? a quello pi? prezioso per l'utenza residenziale: navigazione, posta, VoIP". Il tutto, "a scapito del resto, per esempio del peer to peer".

Quando avete sottoscritto il contratto adsl avete ottenuto accesso a INTERNET senza alcuna limitazione. Oggi il P2P ? parte di internet, anzi il 70% del traffico mondiale di dati ? proprio per il P2P (tra cui eMule).
Bloccando il P2P le compagnie telefoniche vengono meno al contratto sottoscritto e spero che qualcuno pi? esperto di noi (magari uno dei tanti movimenti consumatori) si affretti a intentare qualche causa legale: certa gente conosce solo il linguaggio degli avvocati e dei soldi.
Non fatevi fregare. Il P2P non ? illegale. E' illegale scaricare materiale protetto da copyright. Non possono bloccare il P2P e dirvi di non usarlo (una delle risposte stupide dei call center). E' come vietare i coltelli da cucina perch? potrebbero essere usati per uccidere le persone.

Certo che questo metodo ? interessante. Invece di COMPRARE altre linee dalla Telecom per soddisfare il traffico dei loro utenti, queste compagnie cercano di STROZZARE gli utenti dando loro sempre meno.
Non contente, promettono velocit? sempre pi? alte (24 Mbit???) che per? potete usare solo per navigare sul www.
Peccato nessuno dica che per navigare sul web basta e avanza una adsl 640Kbps da 20 euro al mese.

Due sono le cose: o questi signori si affrettano a sbloccare le linee o fareste meglio a disdire e passare a provider che non effettuano queste limitazioni (Alice adsl attualmente non ha questi problemi).

Se volete esempi di mail di protesta ed alcuni indirizzi utili consultate: Protesta contro i filtri p2p di libero (http://www.liberop2p.p2pforum.it/) dove troverete anche una guida a disdire Libero ADSL.

Da: Free Internet






From spam_me at yahoo.com  Sat Feb 18 11:42:54 2006
From: spam_me at yahoo.com (K. Jansma)
Date: Sat, 18 Feb 2006 17:42:54 +0100
Subject: share function argument between subsequent calls but not between
	class instances!
Message-ID: <11vejkega5tbrc5@corp.supernews.com>

Hi,

given the following example class

class Test:
    def f(self,a, L=[]):
        L.append(a)
        return L

and the following statements

a = Test()
a.f(0)
a.f(0)
a.f(0)
b = Test()
b.f(0)

this is the output I would like to have (i.e., expect)

>>> a = Test()
>>> a.f(0)
[0]
>>> a.f(0)
[0, 0]
>>> a.f(0)
[0, 0, 0]
>>> b = Test()
>>> b.f(0)
[0]

But this is what I get:

>>> a = Test()
>>> a.f(0)
[0]
>>> a.f(0)
[0, 0]
>>> a.f(0)
[0, 0, 0]
>>> b = Test()
>>> b.f(0)
[0, 0, 0, 0]


as you can see, the b.f method shares L with a.f.
How can I avoid this without using eg. self.L in an __init__?

Thanks in advance,
Karel.



From fuzzyman at gmail.com  Mon Feb  6 16:56:08 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 6 Feb 2006 13:56:08 -0800
Subject: Detecting line endings
In-Reply-To: <slrndueq4g.9pc.sybrenUSE@schuimige.unrealtower.org>
References: <1139236514.022464.319970@g14g2000cwa.googlegroups.com>
	<slrndueq4g.9pc.sybrenUSE@schuimige.unrealtower.org>
Message-ID: <1139262968.081207.259100@f14g2000cwb.googlegroups.com>


Sybren Stuvel wrote:
> Fuzzyman enlightened us with:
> > My worry is that if '\n' *doesn't* signify a line break on the Mac,
> > then it may exist in the body of the text - and trigger ``ending =
> > '\n'`` prematurely ?
>
> I'd count the number of occurences of '\r\n', '\n' without a preceding
> '\r' and '\r' without following '\n', and let the majority decide.
>

This is what I came up with. As you can see from the docstring, it
attempts to sensible(-ish) things in the event of a tie, or no line
endings at all.

Comments/corrections welcomed. I know the tests aren't very useful
(because they make no *assertions* they won't tell you if it breaks),
but you can see what's going on :

import re
import os

rn = re.compile('\r\n')
r = re.compile('\r(?!\n)')
n = re.compile('(?<!\r)\n')

# Sequence of (regex, literal, priority) for each line ending
line_ending = [(n, '\n', 3), (rn, '\r\n', 2), (r, '\r', 1)]


def find_ending(text, default=os.linesep):
    """
    Given a piece of text, use a simple heuristic to determine the line
    ending in use.

    Returns the value assigned to default if no line endings are found.
    This defaults to ``os.linesep``, the native line ending for the
    machine.

    If there is a tie between two endings, the priority chain is
    ``'\n', '\r\n', '\r'``.
    """
    results = [(len(exp.findall(text)), priority, literal) for
        exp, literal, priority in line_ending]
    results.sort()
    print results
    if not sum([m[0] for m in results]):
        return default
    else:
        return results[-1][-1]

if __name__ == '__main__':
    tests = [
        'hello\ngoodbye\nmy fish\n',
        'hello\r\ngoodbye\r\nmy fish\r\n',
        'hello\rgoodbye\rmy fish\r',
        'hello\rgoodbye\n',
        '',
        '\r\r\r \n\n',
        '\n\n \r\n\r\n',
        '\n\n\r \r\r\n',
        '\n\r \n\r \n\r',
        ]
    for entry in tests:
        print repr(entry)
        print repr(find_ending(entry))
        print

All the best,


Fuzzyman
http://www.voidspace.org.uk/python/index.shtml
> Sybren
> --
> The problem with the world is stupidity. Not saying there should be a
> capital punishment for stupidity, but why don't we just take the
> safety labels off of everything and let the problem solve itself?
>                                              Frank Zappa



From smitty_one_each at bigfoot.com  Mon Feb 20 18:56:11 2006
From: smitty_one_each at bigfoot.com (Chris Smith)
Date: Mon, 20 Feb 2006 18:56:11 -0500
Subject: editor for Python on Linux
References: <dtai6e$23m$2@ariane.blic.net>
	<mailman.2134.1140381888.27775.python-list@python.org>
Message-ID: <87bqx18u04.fsf@bigfoot.com>

>>>>> "Sriram" == Sriram Krishnan <sriramk at gmail.com> writes:

    >> Mladen Adamovic wrote:
    >> Hi!  I wonder which editor or IDE you can recommend me for
    >> writing Python programs. I tried with jEdit but it isn't
    >> perfect.
    >> 

Check out http://wiki.python.org/moin/PythonEditors. I personally use Emacs

Yeah, emacs: yeah.  Particularly with the Emacs Code Browser add-on.
R,
C


From benji at benjiyork.com  Thu Feb  2 14:03:24 2006
From: benji at benjiyork.com (Benji York)
Date: Thu, 02 Feb 2006 14:03:24 -0500
Subject: How do I dynamically create functions without lambda?
In-Reply-To: <1ha3g79.1gcm6x1yziggyN%aleaxit@yahoo.com>
References: <1138389517.896043.7450@g47g2000cwa.googlegroups.com>	<pan.2006.01.28.00.35.06.174939@REMOVETHIScyber.com.au>	<1138436008.628882.126510@g44g2000cwa.googlegroups.com>	<pan.2006.01.28.12.02.34.293286@REMOVETHIScyber.com.au>	<drr978$oat$1@xenon.Stanford.EDU>
	<1ha3g79.1gcm6x1yziggyN%aleaxit@yahoo.com>
Message-ID: <43E2577C.3050006@benjiyork.com>

Alex Martelli wrote:
> Disagree -- far more people THINK they're clever, than really ARE
> clever.  According to a recent article in the Financial Times, over 40%
> of a typical financial firm's employees firmly believe they are among
> the 5% best employees of the firm -- and the situation, believe me, is
> no different in programming.

It's apparently no different anywhere: 
http://www.phule.net/mirrors/unskilled-and-unaware.html
--
Benji York


From orome.the.valar at gmail.com  Wed Feb 15 05:22:42 2006
From: orome.the.valar at gmail.com (Sinan Nalkaya)
Date: Wed, 15 Feb 2006 04:22:42 -0600
Subject: pop line from file
Message-ID: <8c05f79c0602150222q395c961v40bbf1331e6cab5c@mail.gmail.com>

hello all,
i searched and google long long time but couldnt find any result, i
want pop the first line from file, i dont want to read all file
contents because file is being updated from another proccess. even i
couldnt realize its algorithm, thanks for any suggestion


From c_shyone at yahoo.com  Fri Feb 17 11:11:48 2006
From: c_shyone at yahoo.com (Farel)
Date: 17 Feb 2006 08:11:48 -0800
Subject: Which is faster? (if not b in m) or (if m.count(b) > 0)
In-Reply-To: <mailman.1988.1140064009.27775.python-list@python.org>
References: <mailman.1988.1140064009.27775.python-list@python.org>
Message-ID: <1140192708.160844.138890@g14g2000cwa.googlegroups.com>

Tim, Are you saying that:
     not (b in m)
is faster than:
    b not in m
????



From carsten at uniqsys.com  Tue Feb 14 14:46:22 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Tue, 14 Feb 2006 14:46:22 -0500
Subject: using an existing DLL file without having access to the source
	code?
In-Reply-To: <43F22683.7020407@gmail.com>
References: <43F22683.7020407@gmail.com>
Message-ID: <1139946382.15235.6.camel@dot.uniqsys.com>

On Tue, 2006-02-14 at 13:50, Dieter Vanderelst wrote:
> Dear all,
> 
> Could anybody tell me whether there are ways to use an existing DLL file 
> in Python without having access to the source code?

That sounds like a job for ctypes:
http://starship.python.net/crew/theller/ctypes/

HTH,

Carsten.




From nadavh at visionsense.com  Wed Feb 22 01:57:47 2006
From: nadavh at visionsense.com (Nadav Horesh)
Date: Wed, 22 Feb 2006 08:57:47 +0200
Subject: [Numpy-discussion] algorithm, optimization, or other problem?
Message-ID: <07C6A61102C94148B8104D42DE95F7E8C8EF39@exchange2k.envision.co.il>

You may get a significant boost by replacing the line:
  w=w+ eta * (y*x - y**2*w)
with
  w *= 1.0 - eta*y*y
  w += eta*y*x

I ran a test on a similar expression and got 5 fold speed increase.
The dot() function runs faster if you compile with dotblas.

  Nadav.


-----Original Message-----
From:	numpy-discussion-admin at lists.sourceforge.net on behalf of Bruce Southey
Sent:	Tue 21-Feb-06 17:15
To:	Brian Blais
Cc:	python-list at python.org; numpy-discussion at lists.sourceforge.net; scipy-user at scipy.net
Subject:	Re: [Numpy-discussion] algorithm, optimization, or other problem?
Hi,
In the current version, note that Y is scalar so replace the squaring
(Y**2) with Y*Y as you do in the dohebb function.  On my system
without blas etc removing the squaring removes a few seconds (16.28 to
12.4). It did not seem to help factorizing Y.

Also, eta and tau are constants so define them only once as scalars
outside the loops and do the division outside the loop. It only saves
about 0.2 seconds but these add up.

The inner loop probably can be vectorized because it is just vector
operations on a matrix. You are just computing over the ith dimension
of X.  I think that you could be able to find the matrix version on
the net.

Regards
Bruce



On 2/21/06, Brian Blais <bblais at bryant.edu> wrote:
> Hello,
>
> I am trying to translate some Matlab/mex code to Python, for doing neural
> simulations.  This application is definitely computing-time limited, and I need to
> optimize at least one inner loop of the code, or perhaps even rethink the algorithm.
>    The procedure is very simple, after initializing any variables:
>
> 1) select a random input vector, which I will call "x".  right now I have it as an
> array, and I choose columns from that array randomly.  in other cases, I may need to
> take an image, select a patch, and then make that a column vector.
>
> 2) calculate an output value, which is the dot product of the "x" and a weight
> vector, "w", so
>
>         y=dot(x,w)
>
> 3) modify the weight vector based on a matrix equation, like:
>
>         w=w+ eta * (y*x - y**2*w)
>                ^
>                |
>                +---- learning rate constant
>
> 4) repeat steps 1-3 many times
>
> I've organized it like:
>
> for e in 100:   # outer loop
>      for i in 1000:  # inner loop
>          (steps 1-3)
>
>      display things.
>
> so that the bulk of the computation is in the inner loop, and is amenable to
> converting to a faster language.  This is my issue:
>
> straight python, in the example posted below for 250000 inner-loop steps, takes 20
> seconds for each outer-loop step.  I tried Pyrex, which should work very fast on such
> a problem, takes about 8.5 seconds per outer-loop step.  The same code as a C-mex
> file in matlab takes 1.5 seconds per outer-loop step.
>
> Given the huge difference between the Pyrex and the Mex, I feel that there is
> something I am doing wrong, because the C-code for both should run comparably.
> Perhaps the approach is wrong?  I'm willing to take any suggestions!  I don't mind
> coding some in C, but the Python API seemed a bit challenging to me.
>
> One note: I am using the Numeric package, not numpy, only because I want to be able
> to use the Enthought version for Windows.  I develop on Linux, and haven't had a
> chance to see if I can compile numpy using the Enthought Python for Windows.
>
> If there is anything else anyone needs to know, I'll post it.  I put the main script,
> and a dohebb.pyx code below.
>
>
>                         thanks!
>
>                                         Brian Blais
>
> --
> -----------------
>
>              bblais at bryant.edu
>              http://web.bryant.edu/~bblais
>
>
>
>
> # Main script:
>
> from dohebb import *
> import pylab as p
> from Numeric import *
> from RandomArray import *
> import time
>
> x=random((100,1000))    # 1000 input vectors
>
> numpats=x.shape[0]
> w=random((numpats,1));
>
> th=random((1,1))
>
> params={}
> params['eta']=0.001;
> params['tau']=100.0;
> old_mx=0;
> for e in range(100):
>
>      rnd=randint(0,numpats,250000)
>      t1=time.time()
>      if 0:  # straight python
>          for i in range(len(rnd)):
>              pat=rnd[i]
>              xx=reshape(x[:,pat],(1,-1))
>              y=matrixmultiply(xx,w)
>              w=w+params['eta']*(y*transpose(xx)-y**2*w);
>              th=th+(1.0/params['tau'])*(y**2-th);
>      else: # pyrex
>          dohebb(params,w,th,x,rnd)
>      print time.time()-t1
>
>
> p.plot(w,'o-')
> p.xlabel('weights')
> p.show()
>
>
> #=============================================
>
> #         dohebb.pyx
>
> cdef extern from "Numeric/arrayobject.h":
>
>    struct PyArray_Descr:
>      int type_num, elsize
>      char type
>
>    ctypedef class Numeric.ArrayType [object PyArrayObject]:
>      cdef char *data
>      cdef int nd
>      cdef int *dimensions, *strides
>      cdef object base
>      cdef PyArray_Descr *descr
>      cdef int flags
>
>
> def dohebb(params,ArrayType w,ArrayType th,ArrayType X,ArrayType rnd):
>
>
>      cdef int num_iterations
>      cdef int num_inputs
>      cdef int offset
>      cdef double *wp,*xp,*thp
>      cdef int *rndp
>      cdef double eta,tau
>
>      eta=params['eta']  # learning rate
>      tau=params['tau']  # used for variance estimate
>
>      cdef double y
>      num_iterations=rnd.dimensions[0]
>      num_inputs=w.dimensions[0]
>
>      # get the pointers
>      wp=<double *>w.data
>      xp=<double *>X.data
>      rndp=<int *>rnd.data
>      thp=<double *>th.data
>
>      for it from 0 <= it < num_iterations:
>
>          offset=rndp[it]*num_inputs
>
>          # calculate the output
>          y=0.0
>          for i from 0 <= i < num_inputs:
>              y=y+wp[i]*xp[i+offset]
>
>          # change in the weights
>          for i from 0 <= i < num_inputs:
>              wp[i]=wp[i]+eta*(y*xp[i+offset] - y*y*wp[i])
>
>          # estimate the variance
>          thp[0]=thp[0]+(1.0/tau)*(y**2-thp[0])
>
>
>
>
>
>
>
> -------------------------------------------------------
> This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
> for problems?  Stop!  Download the new AJAX search engine that makes
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> _______________________________________________
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> Numpy-discussion at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/numpy-discussion
>


-------------------------------------------------------
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From johnjsal at NOSPAMgmail.com  Wed Feb 15 14:16:35 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 15 Feb 2006 19:16:35 GMT
Subject: Python, Forms, Databases
In-Reply-To: <1140030788.083799.45060@f14g2000cwb.googlegroups.com>
References: <1140030788.083799.45060@f14g2000cwb.googlegroups.com>
Message-ID: <n6LIf.1625$No6.38233@news.tufts.edu>

Tempo wrote:
> I have been looking around for a few days for ways to use Python with
> HTML forms. What I am interested in doing is placing the data that is
> submited through an HTML form and collected by Python into a MySQL
> database. I initially thought that I was going to be able to do this
> with ASP, but I found out that my web hosting provider doesn't have ASP
> support installed into their servers. Also, I couldn't find any dirt
> cheap hosting providers that did support Pyton and ASP together. The
> next solution I stumbled upon was to use Zope. However, I wasn't sure
> if I should spend more of my time looking into this or not, and I found
> a possible way around this, which is by using the CGI module. As you
> can see, I am somewhat new to Python web programming and I have
> confused myself. Can anybody name a few modules that I should look into
> and these modules are the ones that will allow me to accomplish what I
> am interested in doing? Thanks for your help.
> 

The host I use was cheap when I signed up (around $4/month) for a 
personal site. You might try them: STP Web Hosting. They have ASP 
support, and I recently asked them about Python and they turned that on 
for me also.


From jgardner at jonathangardner.net  Mon Feb 27 19:49:42 2006
From: jgardner at jonathangardner.net (Jonathan Gardner)
Date: 27 Feb 2006 16:49:42 -0800
Subject: Catch exceptions
In-Reply-To: <1141086669.334852.80660@u72g2000cwu.googlegroups.com>
References: <1141083485.798371.188440@u72g2000cwu.googlegroups.com>
	<1141085325.698323.297100@v46g2000cwv.googlegroups.com>
	<1141086669.334852.80660@u72g2000cwu.googlegroups.com>
Message-ID: <1141087782.551975.5810@i39g2000cwa.googlegroups.com>

(A) You'll have to be more specific about your problem if you want us
to help. Under which circumstances did it work or not? What exactly is
the problem?

(B) Where you put your error-handling is up to you. It depends on what
the function does and how it is to respond. Do you want the function to
throw an exception if the file is not found, or do you want it to do
something else? Think about the interface of the functions (which is
the sum of the parameters, response, possible exceptions, and expected
behavior) and it should be clear where to put the exception handling.



From fredrik at pythonware.com  Mon Feb 20 06:57:30 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 20 Feb 2006 12:57:30 +0100
Subject: module time
References: <dtc3n1$e0j$1@news.rtcomm.ru>
Message-ID: <dtcara$7qo$1@sea.gmane.org>

"Sergey" wrote:
> There is function
> mktime() -- convert local time tuple to seconds since Epoch
> in module time.
> But how about to convert *GMT time tuple* to seconds since Epoch?
>
> Is there such function?

>>> import calendar
>>> help(calendar.timegm)
Help on function timegm in module calendar:

timegm(tuple)
    Unrelated but handy function to calculate Unix timestamp from GMT.

</F> 





From nospamformeSVP at gmail.com  Mon Feb 27 11:36:25 2006
From: nospamformeSVP at gmail.com (Don Taylor)
Date: Mon, 27 Feb 2006 11:36:25 -0500
Subject: Use of __slots__
In-Reply-To: <1hbepsi.1ms8ll98un954N%aleaxit@yahoo.com>
References: <dtt8ga$7b2$1@sea.gmane.org>
	<dtt9o8$ams$1@sea.gmane.org>	<mailman.2475.1141051433.27775.python-list@python.org>
	<1hbepsi.1ms8ll98un954N%aleaxit@yahoo.com>
Message-ID: <dtv9qb$u9$1@sea.gmane.org>

Alex Martelli wrote:


> meant for extremely RARE use, and only by very advanced programmers who
> fully know what they're doing

Yea, from the table of my memory I ?ll wipe away all trivial fond 
records of __slots__

(Bet you wish Mark Lutz had not mentioned it in Learning Python ...)

Don.



From uval at rz.uni-karlsruhe.de  Fri Feb 10 19:37:59 2006
From: uval at rz.uni-karlsruhe.de (=?ISO-8859-1?Q?Sch=FCle_Daniel?=)
Date: Sat, 11 Feb 2006 01:37:59 +0100
Subject: is there a better way?
In-Reply-To: <1139599489.308928.54190@g44g2000cwa.googlegroups.com>
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
	<1139599489.308928.54190@g44g2000cwa.googlegroups.com>
Message-ID: <dsj1hd$hpd$1@news2.rz.uni-karlsruhe.de>

Lonnie Princehouse wrote:
> everybody is making this way more complicated than it needs to be.
> 
> storage = list[:list.index(O)]

the question is whether the old list is needed in the future or not
if not then it would be easer/mor efficient to use

del lst[lst.index(0):]

Regards, Daniel



From fuzzyman at gmail.com  Thu Feb 16 03:29:15 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 16 Feb 2006 00:29:15 -0800
Subject: web crawler in python or C?
In-Reply-To: <1140075962.037640.126340@g43g2000cwa.googlegroups.com>
References: <1140069412.051298.242150@g44g2000cwa.googlegroups.com>
	<7xy80b96h2.fsf@ruckus.brouhaha.com>
	<1140075962.037640.126340@g43g2000cwa.googlegroups.com>
Message-ID: <1140078555.693238.231970@g43g2000cwa.googlegroups.com>


abhinav wrote:
> It is DSL broadband 128kbps.But thats not the point.What i am saying is
> that would python be fine for implementing fast crawler algorithms or
> should i use C.

But a web crawler is going to be *mainly* I/O bound - so language
efficiency won't be the main issue. There are several web crawler
implemented in Python.

> Handling huge data,multithreading,file
> handling,heuristics for ranking,and maintaining huge data
> structures.What should be the language so as not to compromise that
> much on speed.What is the performance of python based crawlers vs C
> based crawlers.Should I use both the languages(partly C and python).How

If your data processing requirements are fairly heavy you will
*probably* get a speed advantage coding them in C and accessing them
from Python.

The usdual advice (which seems to be applicable to you), is to
prototype in Python (which will be much more fun than in C) then test.

Profile to find your real bottlenecks (if the Python one isn't fast
enough - which it may be), and move your bottlenecks to C.

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml

> should i decide what part to be implemented in C and what should be
> done in python?
> Please guide me.Thanks.



From tim.peters at gmail.com  Tue Feb 14 12:17:07 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Tue, 14 Feb 2006 12:17:07 -0500
Subject: processing limitation in Python
In-Reply-To: <1139935358.128826.58660@g14g2000cwa.googlegroups.com>
References: <1139935358.128826.58660@g14g2000cwa.googlegroups.com>
Message-ID: <1f7befae0602140917h424c1a4as200569c34bc15f9a@mail.gmail.com>

[pdr14 at comcast.net]
> If I un-comment any line in this program below the line where I
> commented " all OK up to this point " This program locks up my
> computer.
>
> Windows task manager will show "Not Responding" for Python in the
> Applications tab and in the Performance tabe the CPU usage will be
> locked at %100.
>
> I've experienced the same problem on 2 different computers, one running
> 2000 pro. the other running XP home eddition.  both computers run
> Python 2.4.2
>
> I'm just wondering if any one else has noticed any problems with
> working with large numbers in Python ind if there is anything that can
> work around this issue.
>
> Thankd for reading
> David
>
> def factor(n):
>     d = 2
>     factors = [ ]
>     while n > 1:
>         if n % d == 0:
>             factors.append(d)
>             n = n/d
>         else:
>             d = d + 1
>     print factors

You primary problem is that this is a horridly inefficient way to
factor, taking time propotional to n's largest prime divisor (which
may be n).

> factor (12)
> factor (123)
> factor (1234)
> factor (12345)
> factor (123456)
> factor (1234567)
> factor (12345678)
> factor (123456789)
> factor (1234567898)
> factor (12345678987)
> factor (123456789876)
> factor (1234567898765)       # all OK up to this point
> #factor (12345678987654)    # locks up computer if I run this line

It doesn't lock up for me, using Python 2.3.5 or 2.4.2 on Windows (XP
Pro SP2, but the specific flavor of Windows shouldn't matter).  I ran
it from a DOS box, and while it was plugging away on 12345678987654,
hitting Ctrl+C stopped it.

If you let it continue running, and you & your computer were immortal
(something worth shooting for :-)), it would eventually print the
factorization.  Since

    12345678987654 = 2 * 3 * 2057613164609

the loop would have to go around over 2 trillion times to find the
final 2057613164609 prime factor.  A simple enormous improvement is to
get out of the loop when d*d > n.  Then n must be prime or 1.  That
would slash the worst-care runtime from being proportional to n to
being proportional to sqrt(n).

> ...


From sam at nuevageorgia.com  Mon Feb 27 23:46:48 2006
From: sam at nuevageorgia.com (SamFeltus)
Date: 27 Feb 2006 20:46:48 -0800
Subject: Python and Flash
In-Reply-To: <1141101898.725832.104260@e56g2000cwe.googlegroups.com>
References: <1139230361.675896.241920@z14g2000cwz.googlegroups.com>
	<1139235297.903689.244030@z14g2000cwz.googlegroups.com>
	<1139407620.948877.5820@g14g2000cwa.googlegroups.com>
	<1141101898.725832.104260@e56g2000cwe.googlegroups.com>
Message-ID: <1141102008.086764.24550@j33g2000cwa.googlegroups.com>

PS.  Here is an example...

http://sonomasunshine.com/sonomasunshine/FrontPage.html



From liyana_robert at yahoo.com  Sat Feb 11 10:15:13 2006
From: liyana_robert at yahoo.com (Liyana Robert)
Date: Sat, 11 Feb 2006 07:15:13 -0800 (PST)
Subject: About undisclosed recipient
Message-ID: <20060211151513.76943.qmail@web37602.mail.mud.yahoo.com>

Sir,
  Pls help me to know About undisclosed recipient.
  How we can sent mails to other like this.
   
  Regards,
  Liya Robert.

		
---------------------------------
 
 What are the most popular cars? Find out at Yahoo! Autos 
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From guilligan.geo at yahoo.com  Tue Feb  7 11:49:42 2006
From: guilligan.geo at yahoo.com (Guilligan)
Date: Tue, 07 Feb 2006 11:49:42 -0500
Subject: Mark Hammond's pipe service
Message-ID: <BmeGf.37057$71.1004430@wagner.videotron.net>

Hello to all,

I'm trying to reproduce the PipeService1 from Mark Hammond's "Python 
programming on win32" (which you can get on M. Hammond web site, in the 
sample package, chapter 18). I googled this but there's not much posts 
about this topic.

I'm trying to use the Service frame in that example but using the 
SocketServer module to manage the socket connections. Specifically, the 
SocketServer.ThreadingTCPServer seem to do the job and since it's 
working right out of the box, I rather use this then write my own.  My 
problem is that in the example, within the infinite loop any 
deamon/service must have, the script is actually waiting for either of 
two events to occur before it'll move: the first one to stop the 
service, the second one is used to tell the process that a client is 
waiting. I'm ok with the stopping event. But unless I use the win32pipe 
module, I don't see any way I could tell my script there's a client 
knocking at the socket. But if so, I can't use the ThreadingTCPServer 
and I must manage my connections by myself.

The idea I have is to start a thread in which the ThreadingTCPServer 
would run but I'm not sure about what will happen when the service will 
be stop. Will all that sub-threads be killed? If so I'm ok with it.

If you have any other idea, I'm all open....
Thx
Guilligan

ps : I'm new to this group so please accept my apologies if I don't 
respect any rule about how to send post or anything. I couldn't find any 
site containing any such indication.


From iddw at hotmail.com  Tue Feb 21 11:56:05 2006
From: iddw at hotmail.com (Dave Hansen)
Date: Tue, 21 Feb 2006 10:56:05 -0600
Subject: Python vs. Lisp -- please explain
References: <yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com>
	<mailman.2160.1140440898.27775.python-list@python.org>
	<1140454473.335788@jetspin.drizzle.com>
	<pan.2006.02.20.21.59.12.636908@REMOVETHIScyber.com.au>
	<1140490302.639049@jetspin.drizzle.com>
	<mailman.2231.1140532613.27775.python-list@python.org>
Message-ID: <fugmv1pc41gbo0i2hskuc42avm4aq0gd9g@4ax.com>

On Tue, 21 Feb 2006 08:36:50 -0600 in comp.lang.python, "Chris Mellon"
<arkanes at gmail.com> wrote:

[...]
>
>When asked to name some interpreted (or scripting) languages, they'll
>name some off - perl, python, ruby, javascript, basic...
>
>They won't say Java. Ask them why Python is interpreted and Java isn't
>and you'll have a hard time getting a decent technical answer, because
>Python isn't all that different from Java in that regard, especially
>pre-JIT versions of Java.

IMHO, it's marketing.  Soon after (as soon as?) Sun introduced Java,
they announced microprocessors that would implement the JVM natively.
Thus on those machines, Java would not be "interpreted."

AIUI, the reason native Java chips never took off is 1) limited
utility (who wants a chip that can only run Java programs?), and 2)
performance on native chips wasn't even better than JVMs running on
commodity microprocessors, so what's the point?

>
>Probably the most accurate definition of "interpreted" as it is used
>in the wild is "one of these languages: perl, python, perl, ruby,
>etc". That is, you're essentially claiming that Python is interpreted
>because everyone thinks of it that way, technical correctness be
>damned.

I think another reason "perl, Python etc." are known to be interpreted
and Java is not is the interactivity afforded by former group.  This
is also why, e.g., lisp and Forth are thought of as interpreted (at
least by those with only a passing familiarity with the languages),
though native compilers for both languages are readily available.

Regards,
                                        -=Dave

-- 
Change is inevitable, progress is not.


From wegwerp at gmail.com  Mon Feb  6 04:13:38 2006
From: wegwerp at gmail.com (Bas)
Date: 6 Feb 2006 01:13:38 -0800
Subject: Numeric and matlab
In-Reply-To: <mailman.1452.1139174878.27775.python-list@python.org>
References: <mailman.1452.1139174878.27775.python-list@python.org>
Message-ID: <1139217218.843970.138790@f14g2000cwb.googlegroups.com>

Hi,

I am also considering a switch from Matlab to NumPy/SciPy at some
point.

Note that in the last version of Matlab (7?) you don't have to use
'find', but you now can 'conditional arrays'  as an index, so instead
of
  idx=find(a>5);
  a(idx)=6;
you can do:
  cond=a>5;
  a(cond) = 6;
or even shorter
  a(a>5) = 6;

Does someone know if the same trick is possible in NumPy?

Cheers,
Bas



From steve at holdenweb.com  Sat Feb 11 11:56:01 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 11 Feb 2006 11:56:01 -0500
Subject: Yet another GUI toolkit question...
In-Reply-To: <1139674743.846644.281840@z14g2000cwz.googlegroups.com>
References: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>	<mailman.1743.1139664790.27775.python-list@python.org>
	<1139674743.846644.281840@z14g2000cwz.googlegroups.com>
Message-ID: <dsl4v0$lp1$1@sea.gmane.org>

Robert Hicks wrote:
> Wow you are so wrong about Tk on OSX. Soon this is just not going to be
> the case at all for any of the system Tcl/Tk runs on. The Tcl folks
> have come out with a package called "Tile" that is going to be rolled
> in. It gives you native L&F on OSX, Windows, Linux.
> 
This is good news if it happens, but right now it's just another dose of 
"real soon now".

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From michael at adrhinum.de  Tue Feb  7 11:52:33 2006
From: michael at adrhinum.de (Michael Amrhein)
Date: Tue, 07 Feb 2006 17:52:33 +0100
Subject: Natural Language Date Processing.
In-Reply-To: <mailman.1544.1139316354.27775.python-list@python.org>
References: <mailman.1544.1139316354.27775.python-list@python.org>
Message-ID: <43E8D051.1080801@adrhinum.de>

Andrew Gwozdziewycz schrieb:
> I've been looking recently for date processing modules that can parse 
> dates in forms such as
> "next week" or "6 days from next sunday".  PHP has a function that will 
> do this called 'strtotime',
> but I have not found a Python implementation. I've check the standard 
> date, datetime and time
> modules and also mx.Date* modules. Am I overlooking something here or 
> does it not exist?
> Anyone know of an implementation? Also, I realize that this is perhaps 
> very English specific
> so I apologize to any non-native English speakers.
> 
> ---
> Andrew Gwozdziewycz
> apgwoz at gmail.com
> http://ihadagreatview.org
> http://plasticandroid.org
> 
> 

You may take a look at http://labix.org/python-dateutil
Have fun
Michael


From http  Fri Feb 24 21:54:27 2006
From: http (Paul Rubin)
Date: 24 Feb 2006 18:54:27 -0800
Subject: webmail-SquirrelMail Fetcher In Python
References: <mailman.2418.1140835913.27775.python-list@python.org>
Message-ID: <7x7j7kgnbw.fsf@ruckus.brouhaha.com>

<brandon.mcginty at gmail.com> writes:
> I've been looking on the net for a program to gather e-mails from the
> squirrelmail interface, and haven't found any.
> My office only allows me to get e-mail access via webmail, at least
> when I'm outside of the corperate network.

Squirrelmail is an IMAP client so there must be an IMAP server on the
server side somewhere.  Why not talk to your IT dept about accessing
it with a normal mail client instead of messing with screen scraping
madness.  Squirrelmail is pretty messy and I gave up on it long ago.


From ajsiegel at optonline.com  Tue Feb  7 13:08:25 2006
From: ajsiegel at optonline.com (ajsiegel at optonline.com)
Date: 7 Feb 2006 10:08:25 -0800
Subject: Detecting line endings
In-Reply-To: <5h0Gf.2209$D32.632@fe12.lga>
References: <1139236514.022464.319970@g14g2000cwa.googlegroups.com>
	<1hacujo.1p81efw1ej38ioN%aleaxit@yahoo.com>
	<SY%Ff.2208$D32.1862@fe12.lga> <5h0Gf.2209$D32.632@fe12.lga>
Message-ID: <1139335705.257047.295420@g44g2000cwa.googlegroups.com>


Arthur wrote:
> Arthur wrote:

> Is my premise that tokenizer needs universal newline support to be
> reliable correct?
>
> What else could put it out of sync with the complier?

Anybody out there?

Is my question, and the real world issue that provked it, unclear.

Is the answer too obvious?

Have I made *everybody's* kill list?

Isn't it a prima facie issue if the tokenizer fails in ways
incompatible with what the compiler is seeing?

Is this just easy, and I am making it hard?  As I apparently do with
Python more generally.

Art



From bblais at bryant.edu  Sun Feb 26 11:04:21 2006
From: bblais at bryant.edu (Brian Blais)
Date: Sun, 26 Feb 2006 11:04:21 -0500
Subject: sort one list using the values from another list
Message-ID: <4401D185.7020706@bryant.edu>

Hello,

I have two lists, one with strings (filenames, actually), and one with a real-number
rank, like:

A=['hello','there','this','that']
B=[3,4,2,5]

I'd like to sort list A using the values from B, so the result would be in this example,

A=['this','hello','there','that']

The sort method on lists does in-place sorting.  Is there a way to do what I want here?


		thanks,

			Brian Blais

-- 
-----------------

             bblais at bryant.edu
             http://web.bryant.edu/~bblais



From http  Wed Feb  8 20:41:14 2006
From: http (Paul Rubin)
Date: 08 Feb 2006 17:41:14 -0800
Subject: Pulling all n-sized combinations from a list
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>
	<7x7j85czje.fsf@ruckus.brouhaha.com>
	<1139436433.439927.175100@g47g2000cwa.googlegroups.com>
	<7xr76dwiy3.fsf@ruckus.brouhaha.com>
	<1139440532.158500.16930@z14g2000cwz.googlegroups.com>
	<mailman.1636.1139446329.27775.python-list@python.org>
Message-ID: <7xbqxhwbph.fsf@ruckus.brouhaha.com>

Michael Spencer <mahs at telcopartners.com> writes:
> This is roughly 30 times faster on my box than the general solution above

Good point.  You could probably improve the generator version some
(probably not 30x) by doing less list arithmetic and slicing though.
I just wrote it the most straightforward way I could.  You could
probably speed up the nested-loops version somewhat too, by keeping
track of the indices instead of doing all that list slicing.


From http  Mon Feb 13 19:39:38 2006
From: http (Paul Rubin)
Date: 13 Feb 2006 16:39:38 -0800
Subject: invert the order of a string
References: <dsr600$9sj$1@solaris.cc.vt.edu>
	<6272v111vee95606gd7fucjdqmec8uhc7e@4ax.com>
	<dsr6n3$amh$1@solaris.cc.vt.edu>
	<aq72v1l60fo3rv1r8oq9np7nc7i5ikueer@4ax.com>
	<dsr7q6$cnv$1@solaris.cc.vt.edu>
Message-ID: <7x7j7yixit.fsf@ruckus.brouhaha.com>

rtilley <rtilley at vt.edu> writes:
> Well, it turns out to be the best way to invert a string, IMO. The
> reversed() feature returns a reversed object... not a reversed
> string. In short, I have to fool with it again _after_ it has been
> inverted. The slicing takes care of the job right away and gives me
> what I want... no Computer Sciencey <reversed object at 0xb6f6152c>>
> to deal with :)

Oh, I see.  I thought I'd tested reversed(...) but I guess I didn't.
I'm going senile.  reversed makes an iterator.

Anyway, slicing is one solution; the array module is another.


From matteosartori at gmail.com  Fri Feb 24 10:28:05 2006
From: matteosartori at gmail.com (matteosartori at gmail.com)
Date: 24 Feb 2006 07:28:05 -0800
Subject: Regular expression fun. Repeated matching of a group Q
Message-ID: <1140794885.460929.223080@i39g2000cwa.googlegroups.com>

Hi all,

I've spent all morning trying to work this one out:

I've got the following string:

<td>04/01/2006</td><td>Wednesday</td><td>&nbsp;</td><td>09:14</td><td>12:44</td><td>12:50</td><td>17:58</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>08:14</td>

from which I'm attempting to extract the date, and the five times from
into a list. Only the very last time is guaranteed to be there so it
should also work for a line like:

<td>03/01/2006</td><td>Tuesday</td><td>Annual_Holiday</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>08:00</td>

My Python regular expression to match that is currently:

digs = re.compile(
r'<td>(\d{2}\/\d{2}\/\d{4})</td>.*?(?:<td>(\d+\:\d+)</td>).*$' )

which first extracts the date into group 1
then matches the tags between the date and the first instance of a time
into group 2
then matches the first instance of a time into group 3
but then group 4 grabs all the remaining string.

I've tried changing the time pattern into

(?:<td>(\d+\:\d+)</td>)+

 but that doesn't seem to mean "grab one or more cases of the previous
regexp."

Any Python regexp gurus with a hint would be greatly appreciated.

M@



From bjtexas at hotmale.con  Tue Feb 21 13:47:55 2006
From: bjtexas at hotmale.con (BJ in Texas)
Date: Tue, 21 Feb 2006 18:47:55 GMT
Subject: Little tool - but very big size... :-(
References: <mailman.2211.1140513270.27775.python-list@python.org>
	<1140513852.240140.144160@f14g2000cwb.googlegroups.com>
Message-ID: <vfJKf.11031$rL5.4951@newssvr27.news.prodigy.net>

bonono at gmail.com wrote:
|| 11MB is seldom a concern for today's machine.
||

A good windows/microsoft attitude.. :-)


-- 
"Last week, I stated this woman was the ugliest woman I had ever
seen. I have since been visited by her sister, and now wish to
withdraw that statement." -- Mark Twain




From jrivero at latinux.org  Mon Feb 20 19:57:13 2006
From: jrivero at latinux.org (Jesus Rivero - (Neurogeek))
Date: Mon, 20 Feb 2006 20:57:13 -0400
Subject: how to break a for loop?
In-Reply-To: <1140476451.649515.127230@g44g2000cwa.googlegroups.com>
References: <1140476451.649515.127230@g44g2000cwa.googlegroups.com>
Message-ID: <43FA6569.7070403@latinux.org>

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Hello Gregory!

	I would also use lists to implement this. They are more practical and
you could take advantage of pop() or remove() methods instead of using
the Oh-so-Scary del. You could also use a lambda+map or reduce methods
to remove all zeros or just do something like this:

list_ = [0,0,0,1,0,0,1]
print [ elm for elm in list_ if elm != 0 ]
[1,1]



Regards,

Jesus (Neurogeek)

Gregory Petrosyan wrote:
> Hello!
> It's 1:56 o'clock in St.-Petersburg now, and I am still coding... maybe
> that's why I encountered stupid problem: I need to remove zeros from
> the begining of list, but I can't :-(. I use
> 
>         for i,coef in enumerate(coefs):
>             if coef == 0:
>                 del coefs[i]
>             else:
>                 break
> 
> but it removes ALL zeros from list. What's up?
> 
> 
> P.S. I feel SO stupid asking this quastion... ;-)
> 

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iD8DBQFD+mVpdIssYB9vBoMRAl4hAJ9RnvgvEo5NsutG9KmD6qOEL7VyFgCfeLit
h7FLsbRvHR1z5DSxSPZHFlY=
=SY2U
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From martin at v.loewis.de  Sat Feb 11 08:07:11 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 11 Feb 2006 14:07:11 +0100
Subject: Shortest prime number program
In-Reply-To: <1139660566.389036.166090@g14g2000cwa.googlegroups.com>
References: <1139652226.869102.310180@g14g2000cwa.googlegroups.com>
	<i_jHf.32$oj5.9305@news.siol.net>
	<1139660566.389036.166090@g14g2000cwa.googlegroups.com>
Message-ID: <43EDE17F.7030000@v.loewis.de>

You can save two bytes with
r=range(2,99)
[x for x in r if sum(x%d==0 for d in r)<2]


From nogradi at gmail.com  Thu Feb  9 19:36:11 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Fri, 10 Feb 2006 01:36:11 +0100
Subject: pythonic exec* spawn*
In-Reply-To: <lbinu19o3nkqn5elsn4dqbvoueonh93ral@4ax.com>
References: <mailman.1686.1139521339.27775.python-list@python.org>
	<lbinu19o3nkqn5elsn4dqbvoueonh93ral@4ax.com>
Message-ID: <5f56302b0602091636q57f3cb7amb45c5c8feff2943a@mail.gmail.com>

> >I would like to pass the whole object at once to the second python
> >program which should start doing its thing with it while the original
> >program should keep running.
>
> os.fork() does that (on Mac and Unix).
>

Okay, but how? It seems to me that if the process which issued
os.fork() ends, then the forked process also ends. And what I would
need is that regardless of the execution time of the original program,
the second one which the original starts (or forks) should finish what
it supposed to do. Roughly I have the following in mind:

-------------------------------------------------------------------------------
def longer( data ):
    # do some stuff, that takes long


# do something to collect data

data = something

# here call the function longer( data ) in a way
# that execution of the code doesn't stop, so
# we get to the following print and then to the end

print "okay, the first program finished"
------------------------------------------------------------------------------

But the execute of longer( data ) should keep going even though the
original program ended. I'm pretty sure it's something basic and
probably I'm not aware of the right concepts and that's why I can't
find the right place to look in the docs.


From sambyerly at netscape.net  Fri Feb 17 15:28:59 2006
From: sambyerly at netscape.net (nick)
Date: 17 Feb 2006 12:28:59 -0800
Subject: Click this link, scroll to the bottom, and get your own free mall!!
Message-ID: <1140208139.196351.60120@z14g2000cwz.googlegroups.com>

http://www.telebay.com/esolutions/mall.html



From littlejohn.75 at news.free.fr  Sat Feb 18 09:20:49 2006
From: littlejohn.75 at news.free.fr (F. Petitjean)
Date: 18 Feb 2006 14:20:49 GMT
Subject: Komodo - Will it Lock Me In?
References: <yEncExpress_Rulz!_www.techsono.com_3223072898@firstva.com>
	<mailman.2081.1140228879.27775.python-list@python.org>
Message-ID: <43f72d41$0$30842$636a55ce@news.free.fr>

Le Fri, 17 Feb 2006 18:14:26 -0800, Trent Mick a ?crit :
>
> Nope. Komodo adds no goo to your code (TM).
> TM's my name, not a trademark on "Komodo adds no goo to your code" --
> but I'm thinking about it. :)
+1 JOTW (Joke of the week)
>
> Cheers,
> Trent
>


From fuzzyman at gmail.com  Mon Feb  6 09:35:14 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 6 Feb 2006 06:35:14 -0800
Subject: Detecting line endings
Message-ID: <1139236514.022464.319970@g14g2000cwa.googlegroups.com>

Hello all,

I'm trying to detect line endings used in text files. I *might* be
decoding the files into unicode first (which may be encoded using
multi-byte encodings) - which is why I'm not letting Python handle the
line endings.

Is the following safe and sane :

text = open('test.txt', 'rb').read()
if encoding:
    text = text.decode(encoding)
ending = '\n' # default
if '\r\n' in text:
    text = text.replace('\r\n', '\n')
    ending = '\r\n'
elif '\n' in text:
    ending = '\n'
elif '\r' in text:
    text = text.replace('\r', '\n')
    ending = '\r'


My worry is that if '\n' *doesn't* signify a line break on the Mac,
then it may exist in the body of the text - and trigger ``ending =
'\n'`` prematurely ?

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml



From blair.houghton at gmail.com  Sat Feb  4 02:31:19 2006
From: blair.houghton at gmail.com (Blair P. Houghton)
Date: 3 Feb 2006 23:31:19 -0800
Subject: OO conventions
In-Reply-To: <43e36755$0$26603$636a55ce@news.free.fr>
References: <mailman.1334.1138833641.27775.python-list@python.org>
	<43E13F39.2070709@freenet.de>
	<1138928426.867847.66790@g44g2000cwa.googlegroups.com>
	<43e36755$0$26603$636a55ce@news.free.fr>
Message-ID: <1139038279.801416.8680@g14g2000cwa.googlegroups.com>


bruno at modulix wrote:
> Blair P. Houghton wrote:
> > So Image.open(filename) seems right as a factory function that opens
> > the file, figures out what it really is, constructs the appropriate
> > subclass object (likely by passing a string to the constructor, e.g.,
> > JPGImage(filename)), and returns the object via the superclass type.
>
> Why "via the superclass type" ? "returns the object" is enough.

I'm just being pedantic; because we can't tell from the return
type what subclass type it is, we see it as an object of the
superclass type and then ask it what subclass type it is.

> > The caller can then either check a flag in the superclass to see what
> > type the subclass is,
>
> Why the h... ? We don't care what type it is, as long at it does what we
> expect it to do.

We might want to know what to expect.  A function returning a Person
may return a Man or a Woman,.  It could make a difference to our
Libido, so it's in our best interest to find out what was returned, so
we
can call the right methods specific to that subclass.

> > or just assume it's the right type of image
>
> Yes
>
> (snip)
> > (or does Python have RTTI?
>
> Much better than 'RTTI'.
>
> > I don't recall if
> > I've seen it, yet...).
>
> obj.__class__ is a reference to the class (which is itself an object...)

Shortly after I posted that I came across other posts mentioning
__class__
and I'm trying to grok it in fullness now.

> > Though if the filename doesn't match the content, someone should raise
> > an exception...
>
> Why ? filenames and extensions are nothing more than conventions.

Ostensibly.  But they're also a means of deceiving people, so the
handling
of a mismatch deserves care.  Whether that care takes the form of an
exception or by defensive coding (which is kind of what exceptions
simplify) is up to you.

> >  Image(string) could easily
> > default to assuming string is a filename, doing the same work as
> > Image.open(filename), though it would at least partially construct an
> > Image instance each time it's called, which isn't what you want.
> > Image.open(filename) defined as a static method (wait...is that
> > possible in Python? I hate being the newbie)
>
> It is (search for 'staticmethod' and 'classmethod'). But there's not
> much use for 'static methods' in Python - we usually just use plain
> functions ('classmethods' are another beast - much more useful than
> staticmethods)

Does it make any noticeable difference in efficiency, or does nobody
care much about efficiency in Python?

--Blair



From bencvt at gmail.com  Thu Feb  9 20:07:09 2006
From: bencvt at gmail.com (Ben Cartwright)
Date: 9 Feb 2006 17:07:09 -0800
Subject: random playing soundfiles according to rating.
References: <1139456949.087347.173800@o13g2000cwo.googlegroups.com>
Message-ID: <1139532595.345369.241560@o13g2000cwo.googlegroups.com>

kp87 at lycos.com wrote:
> But i am stuck on how to do a random chooser that works according to my
> idea of choosing according to rating system. It seems to me to be a bit
> different that just choosing a weighted choice like so:

...

> And i am not sure i want to have to go through what will be hundreds of
> sound files and scale their ratings by hand so that they all add up to
> 100%. I just want to have a long list that i can add too whenever i
> want, and assign it a grade/rating according to my whims!

Indeed, manually normalizing all those weights would be a downright
sinful waste of time and effort.

The solution (to any problem, really) starts with how you conceptualize
it.  For this problem, consider the interval [0, T), where T is the sum
of all the weights.  This interval is made up of adjacent subintervals,
one for each weight.  Now pick a random point in [0, T).  Determine
which subinterval this point is in, and you're done.

import random
def choose_weighted(zlist):
    point = random.uniform(0, sum(weight for key, weight in zlist))
    for key, weight in zlist: # which subinterval is point in?
        point -= weight
        if point < 0:
            return key
    return None # will only happen if sum of weights <= 0

You'll get bogus results if you use negative weights, but that should
be obvious.  Also note that by using random.uniform instead of
random.randrange, floating point weights are handled correctly.

Test it:
  >>> data = (('foo', 1), ('bar', 2), ('skipme', 0), ('baz', 10))
  >>> counts = dict((key, 0) for key, weight in data)
  >>> for i in range(10000):
  ...     counts[choose_weighted(data)] += 1
  ...
  >>> [(key, counts[key]) for key, weight in data]
  [('foo', 749), ('bar', 1513), ('skipme', 0), ('baz', 7738)]
  >>>

--Ben



From joel.hedlund at gmail.com  Thu Feb  9 03:08:13 2006
From: joel.hedlund at gmail.com (Joel Hedlund)
Date: Thu, 09 Feb 2006 09:08:13 +0100
Subject: Best way of finding terminal width/height?
In-Reply-To: <11uk67a4ao5efe6@corp.supernews.com>
References: <96nFf.43896$d5.199922@newsb.telia.net>
	<11uc3dohfitotc5@corp.supernews.com>
	<jysFf.155352$dP1.513537@newsc.telia.net>
	<11udc0r2bq11042@corp.supernews.com> <43E719EE.3040401@gmail.com>
	<11ueq4nhn91qm91@corp.supernews.com> <43E8659D.6010101@gmail.com>
	<11uhcjj2p10mm0d@corp.supernews.com> <43E8D4DD.7040904@gmail.com>
	<11uhodjciifej02@corp.supernews.com>
	<dscfcv$t5i$1@news.lysator.liu.se>
	<11uk67a4ao5efe6@corp.supernews.com>
Message-ID: <dset15$hfq$1@news.lysator.liu.se>

> It didn't insert an EOF, it just caused read() to return
> "prematurely".  You should call read() again until it receives
> a _real_ EOF and returns ''.

Copy that. Point taken.

> There appear to be a couple problems with this description:
>
>  1) It says that read() in blocking mode without a size
>     parameter it will read until EOF.  This is not what happens
>     when reading a terminal that receives SIGWINCH, so you're
>     right: read() it isn't working as described.
>
>  2) It also says that it makes sense to continue to read a tty
>     after you get an EOF.  That's not true.  Once you get an
>     EOF on a tty, there's no point in reading it any more:
>     you'll continue to get an EOF forever.

Should I post a bug about this?

/Joel


From rschroev_nospam_ml at fastmail.fm  Fri Feb 24 05:51:09 2006
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Fri, 24 Feb 2006 10:51:09 GMT
Subject: Unexpected timing results
In-Reply-To: <pan.2006.02.24.10.27.39.349356@REMOVETHIScyber.com.au>
References: <pan.2006.02.23.15.38.11.944281@REMOVETHIScyber.com.au>
	<43FDDDB2.7050703@websafe.com>
	<pan.2006.02.23.22.04.04.778895@REMOVETHIScyber.com.au>
	<dtmijn$6uq$1@wake.carmen.se>
	<pan.2006.02.24.10.27.39.349356@REMOVETHIScyber.com.au>
Message-ID: <xyBLf.276560$kl2.9034796@phobos.telenet-ops.be>

Steven D'Aprano schreef:
> On Fri, 24 Feb 2006 10:11:18 +0100, Magnus Lycka wrote:
> 
>> Steven D'Aprano wrote:
>>> It looks like the time function under Linux at least is very slow.
>> Perhaps you should try doing the same thing in C.
>> Then you can see whether the problem is in the
>> wrapper or in the system call.
> 
> Good idea.
> 
> Now, has anyone got a copy of "Learning C for Dummies" I can borrow?
> 
> *chagrined smile*

First, for reference, the Python version on the machine I used for 
testing (Debian 3.1, P4 3GHz):

timer1:  0.36007809639
timer2:  3.18800234795

On Windows the difference is much less.

C (compiled with gcc 3.3.5 without optimizations) (see below for the code):

timer1: 0.000603
timer2: 2.624557

I think it looks like the problem is in the system call.



C code:

#include <stdio.h>
#include <sys/time.h>
#include <time.h>

void func(void)
{
}

double gettime()
{
     struct timeval tv;
     gettimeofday(&tv, NULL);
     return tv.tv_sec + tv.tv_usec/1e6;
}

double timer1(void)
{
     double t0, t1;
     int i;
     t0 = gettime();
     for (i = 0; i < 100000; ++i)
     {
         func();
     }
     t1 = gettime();
     return t1 - t0;
}

double timer2(void)
{
     int i;
     double t = 0.0;
     double t0, t1;
     for (i = 0; i < 1000000; ++i)
     {
         t0 = gettime();
         func();
         t1 = gettime();
         t += t1 - t0;
     }
     return t;
}

int main(void)
{
     printf("timer1: %lf\n", timer1());
     printf("timer2: %lf\n", timer2());
     return 0;
}




-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From mhellwig at xs4all.nl  Tue Feb 21 19:42:16 2006
From: mhellwig at xs4all.nl (Martin P. Hellwig)
Date: Wed, 22 Feb 2006 01:42:16 +0100
Subject: Basic coin flipper program - logical error help
In-Reply-To: <1140567243.251982.255620@g14g2000cwa.googlegroups.com>
References: <1140567243.251982.255620@g14g2000cwa.googlegroups.com>
Message-ID: <43fbb379$0$11076$e4fe514c@news.xs4all.nl>

DannyB wrote:
 > I'm just learning Python.

So am I :-)

 > I've created a simple coin flipper program -
 > here is the code:
 >
 > [source]
 > #Coin flipper
 > import random
 >
 > heads = 0
 > tails = 0
 > counter = 0
 >
 > coin = random.randrange(2)
 >
 > while (counter < 100):
 >     if (coin == 0):
 >         heads += 1
 >         counter += 1
 >     else:
 >         tails += 1
 >         counter += 1
 >
 > coin = random.randrange(2)

This line is you logic error because it's not part of your while loop 
the coin variables get the result of random.randrange(2) assigned only 
one time (before the loop).

 >
 >
 > print "\nThe coin landed on heads", heads, "times."
 > print "\nThe coin landed on tails", tails, "times."
 > [/source]
 >
 > <<<I'm sure the [source] tags don't work - I through them in there
 > anyway.>>>
 >
 > The program runs - however - it will give me 100 heads OR 100 tails.
 > Can someone spot the logic error?
 >
 > Thanks
 >
 > ~Dan
 >

You could changed the program to this it works too and is just as 
readable (IMHO):

#Coin flipper
import random

heads = 0
tails = 0
counter = 0
				# removed random line
while (counter < 100):
     if random.randrange(2):	# put random here
         heads += 1
         counter += 1
     else:
         tails += 1
         counter += 1
				# removed random line
print "\nThe coin landed on heads", heads, "times."
print "\nThe coin landed on tails", tails, "times."

Take my advice with caution I'm also new to this :-)

Btw, it is possible that the coins lands on it side if not catched with 
the hand (yes I have seen it happen) ;-)

-- 
mph


From steve at holdenweb.com  Tue Feb  7 07:20:54 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 07 Feb 2006 07:20:54 -0500
Subject: Question about idioms for clearing a list
In-Reply-To: <1139300825.858426.12680@o13g2000cwo.googlegroups.com>
References: <mailman.1294.1138727665.27775.python-list@python.org>	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>	<mailman.1489.1139232969.27775.python-list@python.org>	<ds83kd$98m$1@sea.gmane.org>	<43E7F59B.9070009@REMOVEMEcyber.com.au>	<mailman.1537.1139297533.27775.python-list@python.org>
	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>
Message-ID: <dsa3b8$l1h$2@sea.gmane.org>

Raymond Hettinger wrote:
> [Steven D'Aprano]
[...]
> 
> While the sentiment behind the list.clear() suggestion is noble, it is
> an exercise in futility to design a language around the presumption
> that other programmers are incapable of learning the basics of the
> language.
> 
+1 QOTW

> There was a pithy Tim Peters quotation to the effect that he was
> unpersuaded by language proposals predicated on some hypothetical
> average programmer not being smart enough to understand something that
> the rest of us find to be basic.
> 
Well, for those who can't find it you just provided a fairly pithy 
Raymond Hettinger quote :-)

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From bdesth.quelquechose at free.quelquepart.fr  Tue Feb 14 21:12:37 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 15 Feb 2006 03:12:37 +0100
Subject: Pythonic gui format?
In-Reply-To: <1139923105.939191.200660@z14g2000cwz.googlegroups.com>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<43f11990$0$667$626a54ce@news.free.fr>
	<1139923105.939191.200660@z14g2000cwz.googlegroups.com>
Message-ID: <43f26db3$0$1229$636a55ce@news.free.fr>

Gregory Petrosyan a ?crit :
(snip)
> Your dicts example is nice, but this  approach (and some others) lacks
> one important feature: ordering of GUI elements. In XML, the order of
> all elements is specified, and with dicts (or with very clean Georg's
> model) it is not. (BTW remember topics about ordered dicts...)

(rereading this thread...)

Err... Wait a minute. Are you actually *sure* that there's a problem 
with ordering here ? I mean (please stop me if I missed the point): a 
Window is an object, right ? It has attributes (which are named, and 
definitively *not* ordered - remember, object attributes are actually 
stored in a dict). Now *some* of these attributes may well be 
collections of other objects (ie: widgets...). And these collections 
*can* be ordered.

window = {
   '__class__' : 'Window',
   'id' : 'dummy',
   'title' : 'My Dummy Window',
   'w' : 640,
   'h' : 480
   'widgets': [
      {'__class__' : 'Widget',
       'id : 'dummy1',
       'handlers' : {
         'on_click' : # damn...,
        },
      },
      {'__class__' : 'Widget',
       'id : 'dummy2',
       'handlers' : {
         'on_clock' : # dring...,
        },
      },
   ],
}

Braindead Stupid Simple, Isn't it ? (DH was *somehow* right: this is not 
JSON, but this is exactly what JSON is to javascript).

As you see, what needs to be ordered is ordered. Now what we'd need 
would be a way to represent callback (handlers) functions. The simplest 
would probably be to forbid anonymous functions for callbacks, so we 
could just store the fully.qualified.name.to.callback as string...

My 2 cents


From port001 at gentoo.org  Fri Feb 17 19:32:00 2006
From: port001 at gentoo.org (Ian Leitch)
Date: Sat, 18 Feb 2006 00:32:00 +0000
Subject: Class subscripting
In-Reply-To: <g3pcv1dj2ei00kf05rjdki0e6poo2favo2@4ax.com>
References: <g3pcv1dj2ei00kf05rjdki0e6poo2favo2@4ax.com>
Message-ID: <43F66B00.5050801@gentoo.org>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Ronny Mandal wrote:
> Assume we have a class Foo, and instance called bar.
> 
> a variable called baz1 has the value 3.0, baz2 is uninitialized
> 
> Is there a way of reflecting the variable with such syntax:
> 
> print bar[<var_index>], where var_index is a number representing
> internal index.
> 
> bar[<var_index>] = 4.2. #Setting baz2 to 4.2

Hmmm... I don't like this much, though it'd could be a little better if
you kept a separate list which you update in __setitem__ instead of
constructing a new list for each __getitem__ call.

I'm sure someone has a more elegant solution, I'm afraid I'm too tired
to come up with anything better.

Oh, and don't forget to check that key is an IntType!

class MyClass:

    def __init__(self):

        self.a = "I'm a!"
        self.b = "I'm b!"

    def __getitem__(self, key):

        if key != None:

            return list(self.__dict__.values())[key]

x = MyClass()
print x[0]
print x[1]


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ovWBqjXvdSjH3zNh61j5qj4=
=XrYe
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From kmkz89 at gmail.com  Sun Feb 26 16:45:51 2006
From: kmkz89 at gmail.com (kmkz)
Date: 26 Feb 2006 13:45:51 -0800
Subject: Kill forked processes
Message-ID: <1140990351.604347.29110@i39g2000cwa.googlegroups.com>

Hi,

I have a program A that forks off two other programs, B and C. I need B
and C to both terminate if A is closed, but by using the
subprocess.call() method this seems to not be the case; I can shut down
the "black box" that is program A and B/C will still stay up.

How can I achieve the desired behavior?

Thanks,
Evan



From kent at kentsjohnson.com  Fri Feb 10 09:49:56 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Fri, 10 Feb 2006 09:49:56 -0500
Subject: Too Many if Statements?
In-Reply-To: <1139582415.317902.193610@f14g2000cwb.googlegroups.com>
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<6e2iu1hdb8fvlfkcuulloiiq1khlbhret1@4ax.com>
	<1139517959.741090.28560@g14g2000cwa.googlegroups.com>
	<43ec87cc$0$7212$626a54ce@news.free.fr>
	<1139582415.317902.193610@f14g2000cwb.googlegroups.com>
Message-ID: <43eca3d1$1_1@newspeer2.tds.net>

slogging_away wrote:
> bruno at modulix wrote:
>>Why storing error messages ? Why don't you just write'em out (be it to
>>stdout or to a file) ?
> 
> 
> I guess I could do that, (write them to a file as they are discovered).
> Right now the error messages are stored in the array and then the the
> array is scanned via, a for loop and the error messages are written to
> several files in different formats based on the severity of the errors,
> (on a per device basis, a per severity basis, etc.).  This keeps the
> write statements to a minimum and in a central location of the script
> instead of having several statements for each individual error message
> spread throughout the script, (three write statements per error message
> at over 500 error messages would be a significant change).

Sounds like you might like the logging module. A single log entry can be 
written to multiple destinations based on level or source of the entry. 
The distribution of log entries is controlled by the logging 
configuration which can be stored in a text file if you like.

Kent


From hjaltil at torg.is  Thu Feb 23 08:20:12 2006
From: hjaltil at torg.is (YourAverageJoe)
Date: Thu, 23 Feb 2006 13:20:12 +0000
Subject: Wierd Python error.
Message-ID: <web-141753726@heimsnet.is>

To whom it may concern:

I'm running Fedora Core 4 on a rather low-spec system (considered good
cirkabout '99), this one program I'm trying to run is dependant on Python, so I
downloaded the RPM, but when I tried installing it, the following packages were
"missing:" python, python2, and /usr/bin/python. Pretty wierd, huh? I think so
too. Any way of solving the problem would make me one grateful human being!

With regards, Anonymous


From martin at v.loewis.de  Tue Feb  7 17:46:35 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 07 Feb 2006 23:46:35 +0100
Subject: Problem with curses and UTF-8
In-Reply-To: <mailman.1566.1139345769.27775.python-list@python.org>
References: <mailman.1566.1139345769.27775.python-list@python.org>
Message-ID: <43E9234B.6030108@v.loewis.de>

Ian Ward wrote:
> Any Ideas?

I think there is one or more ncurses bugs somewhere.

The ncurses documentation suggests that you should link with
ncurses_w instead of linking with ncurses - you might try
that as well. If it helps, please do report back.

Ultimately, somebody will need to debug ncurses to find out
what precisely happens, and why.

Regards,
Martin


From riteshsarraf at gmail.com  Fri Feb 10 02:37:54 2006
From: riteshsarraf at gmail.com (Ritesh Raj Sarraf)
Date: 9 Feb 2006 23:37:54 -0800
Subject: breaking from loop
Message-ID: <1139557074.938577.281250@f14g2000cwb.googlegroups.com>

Hi,

Following is the code:

def walk_tree_copy(sRepository, sFile, sSourceDir, bFound = None):
    try:
        if sRepository is not None:
            for name in os.listdir(sRepository):
                path = os.path.join(sRepository, name)
                if os.path.isdir(path):
                    walk_tree_copy(path, sFile, sSourceDir, bFound)
                elif name.endswith('.foo') or name.endswith('.bar'):
                    if name == sFile:
                        try:
                            shutil.copy(path, sSourceDir)
                        except IOError, (errno, errstring):
                            errfunc(errno, errstring)
                        except shutil.Error:
                            print name + " is available in " +
sSourceDir + "Skipping Copy!"
                        bFound = True
                        break
                        return bFound
    except OSError, (errno, strerror):
        print errno, strerror

This function allows me to walk into a directory based tree and search
for files ending with .foo and .bar. My requirement is to copy
.foo/.bar.
Say in directory temp=>test=>test.bar is found. So shutil.copy will
copy it. I want that once the copy is done, it should make bFound =
True and get out.
But since test directory is under temp, work_tree_copy makes two calls
of the same function _but_ break only is able to get out from the inner
call.

Where am I wrong in this code ? Is there a better way to implement it ?

Regards,
rrs



From wanghz at gmail.com  Sun Feb 12 10:11:13 2006
From: wanghz at gmail.com (wanghz at gmail.com)
Date: 12 Feb 2006 07:11:13 -0800
Subject: Can I get the 8bit-string representation of any unicode string
Message-ID: <1139757073.364694.176200@g14g2000cwa.googlegroups.com>

Hello, everyone.

I have a problem when I'm processing unicode strings.  Is it possible
to get the 8bit-string representation of any unicode string?

Suppose I get a unicode string:
  a = u'\xc8\xce\xcf\xcd\xc6\xeb';
then, by
  a.encode('latin-1');
I can get the 8bit-string representation of it, that is, the physical
storage format of this string.

But for another kind of unicode string, say:
  b = u'\u4efb\u8d24\u9f50';
I have to:
  b.encode('utf-8')
to get the 8bit-string format of it.

Since these unicode strings are given by an external library function,
I don't know which kind a unicode string belongs to before I get it at
runtime.  So, I wonder if there is a unified way to get the 8bit-string
representation, say, byte-by-byte, of any unicode string?

Thank you very much.



From jzgoda at o2.usun.pl  Mon Feb 27 14:46:00 2006
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Mon, 27 Feb 2006 20:46:00 +0100
Subject: making 'utf-8' default codec
In-Reply-To: <87irr0ae72.fsf@ieee.org>
References: <MPG.1e6d0bea15971bcb989832@news.htnet.hr>	<dtusr3$o1s$1@nemesis.news.tpi.pl>
	<87irr0ae72.fsf@ieee.org>
Message-ID: <dtvkuc$e3c$1@atlantis.news.tpi.pl>

Jorge Godoy napisa?(a):

>>Bad idea. You may accidentally break some libraries that depend on ASCII
>>being default & standard.
> 
> And what would those produce as output when fed with unicode data?  How would
> they handle this input?  IMVHO nothing should rely on having a standard
> charset as input.  If it is required, then the library should set it up by
> itself: explicit is better than implicit.

Besides that, changing default encoding will make program nearly
absolutely unportable as Python by default installs nearly everywhere
with ASCII as default encoding (with iSeries being the only exception
known to me).

-- 
Jarek Zgoda
http://jpa.berlios.de/


From steve at holdenweb.com  Mon Feb 13 10:54:27 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Feb 2006 10:54:27 -0500
Subject: how do you pronounce 'tuple'?
In-Reply-To: <Gg1If.1600$No6.38157@news.tufts.edu>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
	<Gg1If.1600$No6.38157@news.tufts.edu>
Message-ID: <dsqa3g$jaf$1@sea.gmane.org>

John Salerno wrote:
> Erik Max Francis wrote:
> 
> 
>>Even in mathematics, a tuple, or formally an n-tuple, makes more sense 
>>to me pronounced the latter if you list out the various pronounciations 
>>for large n, seems me the _uhs_ outweigh the _oos_.  (There's quadruple 
>>on one side, but then quintuple, sextuple, septuple, heptuple, octuple, 
>>etc., etc., etc.)
> 
> 
> That's kind of the ironic thing. When I first saw the word, I thought 
> maybe it was a Python-specific term (even something from a Monty Python 
> skit, even!). My default pronunciation actually was 'toople', but then I 
> looked it up to be sure and saw that it comes from words like quadruple, 
> quintuple, etc. Well, even then, I was pronouncing those words in my 
> head as 'quintoople', 'sextoople', etc., so that didn't really clarify 
> it for me! But I think 'quintuple' is probably the more popular choice, 
> which makes 'tuple' sound more correct, so to speak.
> 
> I still have a warm spot for 'toople', though, since that's what I 
> called it first, but somehow 'tuple' seems less silly (and less like 
> tupping!)  :)

No, no, no. The correct pronunciation is "tyoople" (or, if you're being 
lazy, "choople"). Anything else is wrong, but we English are usually 
prepared to forgive foreigners their ignorance :-)

[If I pronounced as badly as I type nobody would ever know what I was 
saying].

not-that-we're-arrogant-or-anything-ly y'rs  - steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From francois.schnell at gmail.com  Fri Feb 17 18:36:54 2006
From: francois.schnell at gmail.com (francois.schnell at gmail.com)
Date: 17 Feb 2006 15:36:54 -0800
Subject: Pyserial never read
References: <1140105936.408387.88130@z14g2000cwz.googlegroups.com>
Message-ID: <1140219414.143448.234450@z14g2000cwz.googlegroups.com>

Hello,

I'm not sure I understand precisely your question but maybe you can try
a readline and a flushinput like that:

import serial

port= 0 # or the port where you're device is connected
baudrate=9600 # or the baudrate of your device

s = serial.Serial(port, baudrate) # Open the port

for i in range(100):
	s.flushInput()
	line= s.readline()
	print line



From alanmk at hotmail.com  Sat Feb 25 15:14:06 2006
From: alanmk at hotmail.com (Alan Kennedy)
Date: 25 Feb 2006 12:14:06 -0800
Subject: Pure python implementation of string-like class
References: <20060225.102645.74687871.kayama@st.rim.or.jp>
	<mailman.2433.1140880297.27775.python-list@python.org>
	<1140891600.822510.189140@v46g2000cwv.googlegroups.com>
Message-ID: <1140898446.199399.76050@j33g2000cwa.googlegroups.com>

[Steve Holden]
>>"Wider than UTF-16" doesn't make sense.

[Ross Ridge]
> It makes perfect sense.

No it doesn't.

UTF-16 is a "Unicode Transcription Format", meaning that it is a
mechanism for representing all unicode code points, even the ones with
ordinals greater than 0xFFFF, using series of 16-bit values.

http://en.wikipedia.org/wiki/UTF-16

"""
UTF-16 represents a character above hexadecimal FFFF as a surrogate
pair of code values from the range D800-DFFF. For example, the
character at code point hexadecimal 10000 becomes the code value
sequence D800 DC00, and the character at hexadecimal 10FFFD, the upper
limit of Unicode, becomes the code value sequence DBFF DFFD. Unicode
and ISO/IEC 10646 do not assign characters to any of the code points in
the D800-DFFF range, so an individual code value from a surrogate pair
does not ever represent a character.
"""

So UTF-16 has no "width" to compare to, no more than utf-8 does.

I wonder what character set the OP is dealing with, if it's not
representable with Unicode. Presumably it's not a modern character set?

--
alan kennedy
------------------------------------------------------
email alan:              http://xhaus.com/contact/alan



From cito at online.de  Tue Feb 14 07:13:25 2006
From: cito at online.de (Christoph Zwerschke)
Date: Tue, 14 Feb 2006 13:13:25 +0100
Subject: Pythonic gui format?
In-Reply-To: <43f11990$0$667$626a54ce@news.free.fr>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<43f11990$0$667$626a54ce@news.free.fr>
Message-ID: <dsshh2$8r3$1@online.de>

Bruno Desthuilliers schrieb:
> Gregory Petrosyan a ?crit :
>> I am currently seeking for pythonic alternative for XML. 
> 
> A pretty obvious one is dicts and lists. What about (Q&D):
> 
> window = {
>  'title' : 'Hello World!'
>  'image' : {'text' :"nice picture here",
>  ...

I think this is pretty much the approach of PythonCard 
(http://pythoncard.sf.net) with its resource files.

Bruno, before writing another simple GUI, have a look at PythonCard. 
Maybe it already does what you want.

-- Christoph


From g.brandl-nospam at gmx.net  Thu Feb 16 16:14:47 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Thu, 16 Feb 2006 22:14:47 +0100
Subject: Merging two lists of data (Pythonic way)
In-Reply-To: <5iq9v11peim9ehamh39v2fcilq3ndq1s52@4ax.com>
References: <8k5Jf.27896$sA3.57@fed1read02>
	<1140122391.823206.74580@g14g2000cwa.googlegroups.com>
	<qD5Jf.27899$sA3.5853@fed1read02>
	<5iq9v11peim9ehamh39v2fcilq3ndq1s52@4ax.com>
Message-ID: <45k8a7F6t44mU1@individual.net>

Dave Hansen wrote:
> On Thu, 16 Feb 2006 12:51:24 -0800 in comp.lang.python, "SMB"
> <sean at buildingonline.com> wrote:
> 
>>
>>"Jonathan Gardner" <jgardner at jonathangardner.net> wrote in message 
>>news:1140122391.823206.74580 at g14g2000cwa.googlegroups.com...
>>> codes = map(lambda x: x[0], list1)
>>> for d in list2:
>>>  if d['code'] in codes:
>>>    d['VERIFIED'] = 1
>>>
>>> Is this what you were looking for?
>>>
>>
>>That is exactly what I was looking for.  I will have to take a look at map.
> 
> You might also look at list comprehensions.  Replacing the first line
> in the above with
> 
>    codes = [x[0] for x in list1]
> 
> should yield the same result.

Even another way:

import operator
codes = map(operator.itemgetter(0), list1)

Georg


From juho.schultz at helsinki.fi  Fri Feb 10 11:10:12 2006
From: juho.schultz at helsinki.fi (Juho Schultz)
Date: Fri, 10 Feb 2006 18:10:12 +0200
Subject: Too Many if Statements?
In-Reply-To: <pan.2006.02.10.15.47.14.546628@REMOVETHIScyber.com.au>
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<6e2iu1hdb8fvlfkcuulloiiq1khlbhret1@4ax.com>
	<1139517959.741090.28560@g14g2000cwa.googlegroups.com>
	<dshvb4$jfn$1@wake.carmen.se>
	<1139583025.428875.225500@g14g2000cwa.googlegroups.com>
	<pan.2006.02.10.15.47.14.546628@REMOVETHIScyber.com.au>
Message-ID: <dsidt4$468$1@oravannahka.helsinki.fi>

Steven D'Aprano wrote:
> On Fri, 10 Feb 2006 06:50:25 -0800, slogging_away wrote:
> 
> 
>>Excellent suggestion, (behold the power of the command line!).  I ran
>>two saved versions of the script that had produced the symptom
>>originally described.  The fist seemed to be caused by too many 'if'
>>statements, the second by adding another array, but both came up with
>>the same system error at the command prompt level shown here:
>>
>>SystemError: com_backpatch: offset too large
> 
> 
> Is this a Python error or a shell error?
> 
> If it is a Python error, perhaps you would like to post the entire
> traceback? 
> 
> 
> 

I would believe CamelCaseErrorMessages are produced by Python.

The message is exactly the same I reported with the 2500 elifs. I fooled 
around a bit with this, and it seems that also for/while blocks 
containing more than ~4860 lines give this error.

slogging_away claims his script is about 4900 lines, most of that in a 
for loop, so my bet is he has trouble with the same bug.


From aleaxit at yahoo.com  Mon Feb 20 17:43:05 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 20 Feb 2006 14:43:05 -0800
Subject: Processing text using python
References: <1140451760.998278.90430@g43g2000cwa.googlegroups.com>
	<mailman.2171.1140453999.27775.python-list@python.org>
	<dtdgh2$aft$1@aphrodite.grec.isp.9tel.net>
Message-ID: <1hb2bi9.yxyo32yjcbl0N%aleaxit@yahoo.com>

Xavier Morel <xavier.morel at masklinn.net> wrote:

> Fredrik Lundh wrote:
> > did you read the string chapter in the tutorial ?
> > 
> > http://docs.python.org/tut/node5.html#SECTION005120000000000000000
> > 
> > around the middle of that chapter, there's a section on slicing:
> > 
> >     "substrings can be specified with the slice notation: two indices
> >     separated by a colon"
> > 
> Fredrik, how would you use slices to split a string by groups of 3 
> characters?

I can't answer for him, but maybe:

  [s[i:i+3] for i in xrange(0, len(s), 3)]

...?


Alex


From peter at engcorp.com  Fri Feb 24 09:16:45 2006
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 24 Feb 2006 09:16:45 -0500
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <dtmm8v$fid$1@wake.carmen.se>
References: <dtl9ad$35h$1@sea.gmane.org>
	<dtlat7$80c$1@sea.gmane.org>	<mailman.2376.1140733288.27775.python-list@python.org>
	<dtmm8v$fid$1@wake.carmen.se>
Message-ID: <dtn4gd$tes$1@sea.gmane.org>

Magnus Lycka wrote:
> With an operating system such as Windows, this is
> probably something you can expect to happen, although
> I'm surprised if such long lag times as 200 s are typical.

No way.  I mean, I'm the biggest critic of Windows operating systems 
when used in realtime environments (at least with my customers), but 
there's no way you should "probably expect a 200s delay to happen".

(You can't guarantee it won't, but seeing it on a regular basis is 
sending a clear message that something *else* is going on.  Dennis' 
guess seems a good one.)

> If you need real time characteristics, you should
> probably use a real time operating system, not Windows.

Quite true.  I doubt the OP needs that though.

-Peter



From hancock at anansispaceworks.com  Sat Feb 25 22:46:01 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Sat, 25 Feb 2006 21:46:01 -0600
Subject: "Temporary" Variable
In-Reply-To: <1140818902.428065.282110@j33g2000cwa.googlegroups.com>
References: <1140665472.203495.7570@g44g2000cwa.googlegroups.com>
	<43FD6645.3020201@REMOVEMEcyber.com.au>
	<1140725159.143882.202630@j33g2000cwa.googlegroups.com>
	<pan.2006.02.23.22.19.38.642977@REMOVETHIScyber.com.au>
	<ZmsLf.21067$915.1256@southeast.rr.com>
	<pan.2006.02.24.09.42.22.818116@REMOVETHIScyber.com.au>
	<eiDLf.21220$915.2746@southeast.rr.com>
	<1140818902.428065.282110@j33g2000cwa.googlegroups.com>
Message-ID: <20060225214601.752bbac8@samwise.anansi>

On 24 Feb 2006 14:08:22 -0800
darthbob88 at gmail.com wrote:
> Reply to all: I realize that naming a variable "spam" is
> not entirely kosherized.

In fact this is untrue:  It is an official rule straight
from the BDFL himself that example programs should contain
words like "spam", "ham", "eggs" from the spam sketch. 
Other Monty Python sketch variables are acceptable as well.

This in contrast to longstanding programmer practice to use
the names "foo" and "bar" etc.

Ironically, in introducing Python 2.5 features in his key
note, he consistently used "foo" and "bar" himself.

My faith is so shaken. ;-)

Cheers,
Terry Hancock

 -- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From dschuff at purdue.edu  Wed Feb 22 12:39:42 2006
From: dschuff at purdue.edu (Derek Schuff)
Date: Wed, 22 Feb 2006 12:39:42 -0500
Subject: except clause not catching IndexError
References: <dti4d8$lmn$1@mailhub227.itcs.purdue.edu>
	<8764n7dzl5.fsf@andreasen.org>
Message-ID: <dti7l0$ng4$1@mailhub227.itcs.purdue.edu>

Erwin S. Andreasen wrote:

> Did you by any chance do something like:
> 
> except ValueError, IndexError:
> 
> at some point earlier in this function? That, when catching ValueError
> assigns the resulting exception to IndexError (and so the following
> except IndexError: wouldn't work as IndexError is no longer what you
> think it is). The correct syntax for catching multiple exceptions is:
> 
> except (ValueError, IndexError), targetVariable:
> 
> You could verify this by doing a print repr(IndexError) before your
> line 202, to see that it really is the IndexError builtin.
> 

hey, nice catch. In fact I did exactly that. in my search for a solution for
this problem i discovered the catch-a-tuple-of-exceptions error, and in
fact fixed it, but didn't realize that it was related to the one I posted.
(the idea that exceptions can be redefined caught me off guard).

thanks (to both of you who responded),
-derek


From invalidemail at aerojockey.com  Tue Feb 14 07:31:47 2006
From: invalidemail at aerojockey.com (Carl Banks)
Date: 14 Feb 2006 04:31:47 -0800
Subject: Unexpected behaviour of getattr(obj, __dict__)
References: <pan.2006.02.14.11.36.28.723688@REMOVETHIScyber.com.au>
	<1139919112.714167.203760@f14g2000cwb.googlegroups.com>
Message-ID: <1139920307.858786.20310@g44g2000cwa.googlegroups.com>

Raymond Hettinger wrote:
> Steven D'Aprano wrote:
> > I came across this unexpected behaviour of getattr for new style classes.
> > Example:
> >
> > >>> class Parrot(object):
> > ...     thing = [1,2,3]
> > ...
> > >>> getattr(Parrot, "thing") is Parrot.thing
> > True
> > >>> getattr(Parrot, "__dict__") is Parrot.__dict__
> > False
> >
> > I would have expected that the object returned by getattr would be the
> > same object as the object returned by standard attribute access.
>
> The returned object is a wrapper created on-the-fly as needed.  You've
> requested two of them and each wrapper has a different object id but
> wraps an identical source.
>
> Contemplate this for a bit:
>
> >>> class Parrot(object):
> 	thing = [1,2,3]
> 	def f(self): pass
>
> >>> getattr(Parrot, 'f') is getattr(Parrot, 'f')
> False
> >>> getattr(Parrot, '__dict__') is getattr(Parrot, '__dict__')
> False


Yes, in fact getattr has nothing to do with it.  To wit:

>>> Parrot.f is Parrot.f
False
>>> Parrot.__dict__ is Parrot.__dict__
False

But wait, it gets weirder.

>>> id(Parrot.f) == id(Parrot.f)
True
>>> id(Parrot.__dict__) == id(Parrot.__dict__)
True

But that's not all.  Redefine Parrot as:

class Parrot(object):
    def f(self): pass
    def g(self): pass

Then,

>>> id(Parrot.f) == id(Parrot.g)
True


your-milage-may-vary-ly yr's,

Carl Banks



From deets at nospam.web.de  Sun Feb 26 15:15:25 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 26 Feb 2006 21:15:25 +0100
Subject: How can I find the remainder when dividing 2 integers
In-Reply-To: <1140984473.723258.70050@e56g2000cwe.googlegroups.com>
References: <1140984473.723258.70050@e56g2000cwe.googlegroups.com>
Message-ID: <46egiuFanujjU2@uni-berlin.de>

silverburgh.meryl at gmail.com schrieb:
> I have a string array:
> colors = ["#ff0000", "#00FF00", "#0000FF"]
> colorIndex = 0;
> 
> and I want to loop thru each element of colors
> 
>  for str in strings:
>  print colors[colorIndex++ % colors.length]
> 
> 
> But i get an invalid syntax error when I execute the script:
>     print colors[colorIndex++ % colors.length]
>                               ^
> SyntaxError: invalid syntax


Python doesn't have the post-decrement-operator. Also not a pre-increment.

You have to put a statement like

colorIndex += 1

in your loop.

Diez


From lycka at carmen.se  Mon Feb 27 09:07:13 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Mon, 27 Feb 2006 15:07:13 +0100
Subject: sort one list using the values from another list
In-Reply-To: <dtula8$r30$1@news.yaako.com>
References: <mailman.2447.1140969980.27775.python-list@python.org>
	<4401d314_2@newspeer2.tds.net> <dtula8$r30$1@news.yaako.com>
Message-ID: <dtv12h$dl2$1@wake.carmen.se>

Dolmans Sun wrote:
> Kent Johnson wrote:
>>  >>> [a for b,a in sorted(zip(B,A))]
> 
> also, [a for _,a in sorted(zip(B,A))]
> 
> didn't read refs, tested above python-2.2.3.

Is there something here I can't see, or did you just
change a variable name and present that as another
solution?



From w_a_x_man at yahoo.com  Wed Feb  8 17:37:17 2006
From: w_a_x_man at yahoo.com (William James)
Date: 8 Feb 2006 14:37:17 -0800
Subject: Xah's Edu Corner: Unix damage: color names
In-Reply-To: <1139358736.901080.243350@f14g2000cwb.googlegroups.com>
References: <1133844932.007824.26780@g43g2000cwa.googlegroups.com>
	<1134780763.066592.45390@g49g2000cwa.googlegroups.com>
	<1135405908.381150.133190@o13g2000cwo.googlegroups.com>
	<1136236586.734775.212440@f14g2000cwb.googlegroups.com>
	<1137784561.589887.58380@o13g2000cwo.googlegroups.com>
	<1139356437.987319.59280@g14g2000cwa.googlegroups.com>
	<1139358736.901080.243350@f14g2000cwb.googlegroups.com>
Message-ID: <1139438237.859030.190700@z14g2000cwz.googlegroups.com>


usenet at DavidFilmer.com wrote:

> On AIX and Linux (SuSE 9.3) each color name which contains "gray" is
> also aliased as "grey" for the benefit of both Yanks and Brits.  Thus,

Yankee, n.  In Europe, an American. In the Northern States of
our Union, a New Englander. In the Southern States the word is
unknown. (See  DAMYANK.)



From steve at REMOVETHIScyber.com.au  Sat Feb 25 22:26:02 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sun, 26 Feb 2006 14:26:02 +1100
Subject: Optimize flag question
References: <400BDC416E2A0042AA35DF3919BB8A5115E14B@mail.mtl.proksim.com>
	<mailman.2441.1140904042.27775.python-list@python.org>
	<1140919002.167092.53060@v46g2000cwv.googlegroups.com>
Message-ID: <pan.2006.02.26.03.26.00.766745@REMOVETHIScyber.com.au>

On Sat, 25 Feb 2006 17:56:42 -0800, bonono wrote:

> 
> Steve Holden wrote:
>> > Some other functions rely on the AssertionError exception to indicate to
>> > the user that something went wrong instead of using a user defined
>> > exception.
>> >
>>
>> The real problem here is that you appear to be using AssertionError in
>> an inappropriate way. If some caller passes an incorrect argument to
>> your function, raise a ValueError. If you are passed the wrong type of
>> data, raise a TypeError. And so on. Or, as you imply you thought about,
>> raise a user-defined error.
>>
>> Generally speaking you should reserve assert for circumstances where you
>> expect some invariant condition to be true. Otherwise use an "if"
>> statement and raise some other exception if the condition is True.
>>
> What would be the occasion that AssertionError be the right exception
> to raise then ?

Surely that would be when an assert statement fails?

I don't think AssertionError should be called by hand. At least, I
wouldn't do so.


-- 
Steven.



From sudharsh at gmail.com  Tue Feb 21 10:33:45 2006
From: sudharsh at gmail.com (sudharsh at gmail.com)
Date: 21 Feb 2006 07:33:45 -0800
Subject: Video Capture modules in linux
Message-ID: <1140536025.234765.309040@z14g2000cwz.googlegroups.com>

heya,

i need this video capture modules which i can use in linux, u know the
similar one used in windows, Now Windows is not my type and it would be
really helpful if someone helps me out...i tried libfg but its not
useful in my case (BTW its a great library)...

regards
Sudharshan S



From robert.kern at gmail.com  Fri Feb 10 23:35:30 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 10 Feb 2006 22:35:30 -0600
Subject: Legality of using Fonts
In-Reply-To: <1139631874.397548.37840@g47g2000cwa.googlegroups.com>
References: <1139591308.864757.154740@g44g2000cwa.googlegroups.com>	<pan.2006.02.10.23.30.05.619934@REMOVETHIScyber.com.au>
	<1139631874.397548.37840@g47g2000cwa.googlegroups.com>
Message-ID: <dsjpie$bik$1@sea.gmane.org>

Ross Ridge wrote:
> Steven D'Aprano wrote:
> 
>>It is highly unlikely that any judge will be fooled by a mere change in
>>format ("but Your Honour, I converted the TTF file into a bitmap").
> 
> If that were true, almost the entire X11 bitmap font collection would
> be illegal.  Fonts aren't subject copyright, just the hints in most
> outline fonts, which are considered computer programs.

In the interest of adding some specifics:

  http://www.faqs.org/faqs/fonts-faq/part2/

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From collinw at gmail.com  Sun Feb 12 01:08:43 2006
From: collinw at gmail.com (Collin Winter)
Date: Sun, 12 Feb 2006 07:08:43 +0100
Subject: functional 0.5 released
In-Reply-To: <1139630268.808659.148890@o13g2000cwo.googlegroups.com>
References: <mailman.1723.1139591624.27775.python-list@python.org>
	<1139630268.808659.148890@o13g2000cwo.googlegroups.com>
Message-ID: <43aa6ff70602112208r3c80455dw544f28152c647b18@mail.gmail.com>

On 10 Feb 2006 19:57:48 -0800, bonono at gmail.com <bonono at gmail.com> wrote:
>
> Collin Winter wrote:
> > As always, feedback welcome!
>
> Any specific reason flip only flip the first 2 arguments rather than
> the whole tuple ?
>
> That is, I would like to see:
>
> assert(f(a,b,c, d) == flip(f)(d, c, b, a))

Because that's what I'm used to from Haskell and other functional
languages : ) I'll see what I can do about having it flip all
arguments in the next release.

Thanks,
Collin Winter


From grflanagan at yahoo.co.uk  Mon Feb 27 06:37:21 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 27 Feb 2006 03:37:21 -0800
Subject: TypeError when subclassing 'list'
References: <1140992122.723907.263990@z34g2000cwc.googlegroups.com>
	<1141020419.345601.141560@t39g2000cwt.googlegroups.com>
Message-ID: <1141040240.971068.255460@z34g2000cwc.googlegroups.com>

Simon Percivall wrote:
> The error you're seeing is because you've rebound 'list' to something
> else. Try putting "list = type([])" somewhere above your code.

That's it!  I had rebound 'list' earlier (in error), and though I
deleted the code it must have been "remembered" somehow.  Restarting
PythonWin this morning, there was no error.  Now I've just spent twenty
minutes wondering why  'x.apppend(y)' was raising an
AttributeException! It's going to be one of those weeks...

Thanks Simon

Gerard



From fredrik at pythonware.com  Tue Feb 21 09:07:16 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 21 Feb 2006 15:07:16 +0100
Subject: CGI and Redirect
References: <dtf50n$2n3c$1@node1.news.atman.pl>
Message-ID: <dtf6qk$um$1@sea.gmane.org>

Grzegorz Slusarek wrote:

> Hi All. I need to redirect user in my CGI script,  i Try to use prin
> "Location: "+url but this is not working. Can anyone tell me what I'm
> doing wrong?

something like

    print "Status: 302"
    print "Location: " + new_url
    print
    sys.exit(1)

should work (assuming that sys is imported, of course)

(if it doesn't, you have to define "not working")

hope this helps!

</F> 





From grante at visi.com  Wed Feb 22 19:51:07 2006
From: grante at visi.com (Grant Edwards)
Date: Thu, 23 Feb 2006 00:51:07 -0000
Subject: new wooden door step - fixing and finishing
References: <1140598234.454510.281820@g14g2000cwa.googlegroups.com>
	<V17Lf.17308$915.16029@southeast.rr.com>
	<u37Lf.17318$915.13867@southeast.rr.com>
Message-ID: <11vq1nrrumfjd67@corp.supernews.com>

On 2006-02-23, Jeffrey Schwab <jeff at schwabcenter.com> wrote:

>>> I'm considering having a go at replacing the wooden door step to
>>> our back door. The original is loose and rotting.

>> Some people, when confronted with a problem, think "I know, I'll use
>> Teak Oil."  Now they have two problems.

Yup, chasing down a teak can be almost as difficult as catching
and skinning a nauga.

> Forgot what group I was in.

More or less hoist on one's own petard, eh?

> Kindly replace any Java-specific witticisms with appropriately
> pythonic humor.

-- 
Grant Edwards                   grante             Yow!  Where's the Coke
                                  at               machine? Tell me a joke!!
                               visi.com            


From DonQuixoteVonLaMancha at gmx.net  Sun Feb 26 18:07:27 2006
From: DonQuixoteVonLaMancha at gmx.net (Karsten W.)
Date: 26 Feb 2006 15:07:27 -0800
Subject: wxGlade, wxPython.... pyOpenGL wxWidget?
In-Reply-To: <1140993655.993069.196880@u72g2000cwu.googlegroups.com>
References: <1140993655.993069.196880@u72g2000cwu.googlegroups.com>
Message-ID: <1140995247.471750.174110@e56g2000cwe.googlegroups.com>

PyOpenGL comes with a Tkinter widget for OpenGL, and searching google
"wxwidgets opengl" yields http://www.wxwidgets.org/opengl.htm

Kind regards,
Karsten.



From dcrespo at gmail.com  Mon Feb 20 08:42:22 2006
From: dcrespo at gmail.com (Daniel Crespo)
Date: 20 Feb 2006 05:42:22 -0800
Subject: Print a PDF transparently
In-Reply-To: <1140223510.666168.183030@z14g2000cwz.googlegroups.com>
References: <1140184955.674138.275010@o13g2000cwo.googlegroups.com>
	<11vbpu58sll1b4f@corp.supernews.com>
	<1140190758.951694.231890@f14g2000cwb.googlegroups.com>
	<fk0cv159vg81i62524nvpuueg8q7iorcnk@4ax.com>
	<1140202841.650774.32920@z14g2000cwz.googlegroups.com>
	<1140223510.666168.183030@z14g2000cwz.googlegroups.com>
Message-ID: <1140442942.893950.115890@g44g2000cwa.googlegroups.com>

> Have you seen this?
>     http://tgolden.sc.sabren.com/python/win32_how_do_i/print.html
> In particular, the section on using win32print directly.

Yes, I have. The problems is that an external program is launched for
handling the file and print it. In the case of PDF, acrobat is
launched. In the case of PS, Ghostview is launched. When printing a
PDF, acrobat keeps alive, so the user has to close it manually. On the
other hand, Ghostview is opened, prints the file and closes
automatically. The last one is which I find the best for me, until now,
(because the Ghostview closes automatically). If I decide to go this
way, my problem then is to transform a pdf to ps, or generate a ps
directly.

For further information on what I want, please, refer to my first two
posts in this topic.

Any other help?

Thank you very much



From JohnRHarlow at gmail.com  Mon Feb  6 13:57:23 2006
From: JohnRHarlow at gmail.com (JohnRHarlow at gmail.com)
Date: 6 Feb 2006 10:57:23 -0800
Subject: script to read emails and extract attachments from cron
Message-ID: <1139252243.663682.168160@f14g2000cwb.googlegroups.com>

Hi:

I am looking for advice on the best way to set up a process to read
incoming emails (from a normal unix mailbox on the same host)
containing a gzipped telemetry attachment. I'd like the script to
extract the attachment into a directory where another process will pick
it up. I plan to run it every minute out of cron, so it would probably
start by moving the mbox file to another name so that incoming emails
and later instances of itself won't be affected.

I'm new to Python (I've mostly tweaked other scripts until now) and
just looking for advice on how to put such a program together. I'm
particularly interested in how to deal with encoded binary attachments.

Thanks
John



From xavier.morel at masklinn.net  Sun Feb  5 14:00:59 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Sun, 05 Feb 2006 20:00:59 +0100
Subject: translating PHP to Python
In-Reply-To: <1139164228.608430.13120@g44g2000cwa.googlegroups.com>
References: <1139164228.608430.13120@g44g2000cwa.googlegroups.com>
Message-ID: <ds5hsq$fco$1@aphrodite.grec.isp.9tel.net>

Dave wrote:
> Anyone familiar with PHP? I'm trying to make a translation. In PHP you
> can get the current object's name by going like this:
> 
> get_class(item) == 'ClassName'
> 
> I've tried type(item), but since I can't be sure if I'll be in __main__
> or as a child object, I can't guarantee what that value will return, so
> I can't just manipulate that value as a string.
> 
Type doesn't return a string, it returns a reference to a class object.

You look like you want to test if the class of an object is <some 
specific class>. For that purpose, check isinstance.

> Is there a simple way to get the current object's name? You would think
> __name__ would work, right? It doesn't.
> 
What do you call "the current object's name"? A python object usually 
has no name per se (only functions and classes do have one I think).

> Now here's  another, similar one:
> 
> You can reference an object's parent object directly in PHP, like so:
> 
> //note the charming use of semi-colon. isn't it cute?
> parent::__construct(
> $stuffInAWeirdSyntaxThatDoesntMeanAnythingWhenYouReadIt);
> 
> I'd like to avoid passing a reference to an object's parent in
> __init__, but is there a built in way in Python to say "You, Parent
> Object, do ...stuff!"
> 
> Thanks!
> 
I guess it's a parent in the inheritance meaning of the term. If so, you 
can use either the call-by-class syntax or the `super` construct.

For the call-by-class, see the Python tutorial, chapter 9.5 
"Inheritance", last paragraph. For the `super` construct, check the help 
on the subject, and the document "Unifying types and classes in Python 
2.2" by the BDFL (http://www.python.org/2.2.3/descrintro.html)


From thomas.dunham at gmail.com  Fri Feb 24 06:29:00 2006
From: thomas.dunham at gmail.com (Tombo)
Date: 24 Feb 2006 03:29:00 -0800
Subject: PYTHONPATH?
In-Reply-To: <46839nF9pi1rU1@uni-berlin.de>
References: <JAsLf.257$6I.183@newsread3.news.pas.earthlink.net>
	<46839nF9pi1rU1@uni-berlin.de>
Message-ID: <1140780540.762103.299430@u72g2000cwu.googlegroups.com>

Said obscure dialog is here:
My Computer > Properties > Advanced (tab) > Environment Variables

You probably want a new system variable.

You can check the value by starting a new terminal window and typing:

echo %PYTHONPATH%

Cheers
Tombo

Diez B. Roggisch wrote:
> Dr. Pastor wrote:
>
> > Several Documents about Python
> > refer to PYTHONPATH.
> > I could not find such variable.
> > (Python 2.4.2, IDLE 1.1.2, Windows XP)
> > How should/could I nominate a Directory to be
> > the local Directory?
> > Thanks for any guidance.
>
> It's a so called environment-variable. You can set these in some obscure
> windows dialog in the system-preferences on a per-system or per-user base.
> Or you start using cygwin (lots of good other reasons for that), and do
> 
> export PYTHONPATH=/whatever
> 
> Diez



From steve at REMOVETHIScyber.com.au  Sun Feb 26 01:19:52 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sun, 26 Feb 2006 17:19:52 +1100
Subject: Modify the local scope inside a function
References: <1140911588.659020.7640@i39g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.26.06.19.50.849311@REMOVETHIScyber.com.au>

On Sat, 25 Feb 2006 15:53:08 -0800, Sandra-24 wrote:

> Is there a way in python to add the items of a dictionary to the local
> function scope? i.e. var_foo = dict['var_foo']. I don't know how many
> items are in this dictionary, or what they are until runtime.

Are you sure you need to do this? How do you use those variables later?

That is, I'm thinking that if you do this:

variables = {"var_foo"=0, "var_bar"=1, "var_baz"=3}
somehow_transfer_to_local_scope(variables)
print var_foo  # or whatever...
print var_bar
print var_baz

it sort of looks pointless to me. In other words, if you have to deal with
the variables BY NAME in your code, then just define them by name. And if
you don't deal with them by name in your code, then they don't need names:

variables = {"var_foo"=0, "var_bar"=1, "var_baz"=3}
for item in variables.values():
    print item


Okay, so they are *really* basic (and pointless) examples. But in most
cases that people say they want to turn strings into variables ("if I have
a string 'abc1', how do I turn it into a variable abc1?") it turns out
that doing so is not the best way of solving their problem.



> exec statements are difficult for debuggers to deal with, 

Which is one of the reasons why exec statements should be avoided whenever
possible. The rule of thumb I use is, any time I feel that I absolutely
must use exec, I drink tequila until the urge goes away.

*wink*

> so as a
> workaround I built my code into a function and saved it in a .py file.

That sounds like normal practice to me. Why aren't you doing that in the
first place?


> The I load the .py file as a module and call the function instead. This
> works great, and it has the added advantage of precompiled versions of
> the code being saved as .pyc and .pyo files. (faster repeated
> execution)

.pyc files don't give you faster execution on repeated calls. They give
you faster loading time on import. The benefit is on the first
import, not subsequent calls to the function. There may be other benefits
as well, but execution speed is not one of them.

Here is a test:

$ ls ftest*
ftest.py  ftest.pyc
$ cat ftest.py
def f(): return sum(range(100))
 
(you'll just have to trust me that ftest.pyc is the compiled version of
ftest.py)

$ python /usr/lib/python2.3/timeit.py --setup="def f(): return sum(range(100))" "f()" 
100000 loops, best of 3: 14 usec per loop 

$ python /usr/lib/python2.3/timeit.py --setup="from ftest import f" "f()"
100000 loops, best of 3: 14.1 usec per loop

No appreciable difference in execution speed.


> The only trouble was I execed inside a specially created scope
> dictionary containing various variables and functions that the code
> requires. 

Ah, your exed'ed code is effectively using global variables.

> I can't seem to figure out how to get this same effect inside
> the function. 

Define the names you need in the module.

var_foo = 0
var_bar = 1
var_baz = 3

def function(x):
    return x + var_foo + var_bar + var_baz


> Right now I'm passing the dict as an argument to the
> function, but I can't modify locals() so it doesn't help me.

No, you can't modify locals. Locals returns a copy of the local
environment as a dict, but changing that dict doesn't change the local
variables.

There is an exception to that rule: if you run locals from the
interpreter, outside of a function, locals() is the same as globals():

>>> locals() is globals()
True

This means that this will work from the interpreter:

>>> x = 6
>>> locals()['x'] = -1
>>> x
-1

but not anywhere else. That's a (rare) Python gotcha.



-- 
Steven.



From peter at engcorp.com  Tue Feb 21 10:49:23 2006
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 21 Feb 2006 10:49:23 -0500
Subject: No
In-Reply-To: <1140534490.873612.64280@g47g2000cwa.googlegroups.com>
References: <1140534490.873612.64280@g47g2000cwa.googlegroups.com>
Message-ID: <dtfcq0$n9n$2@sea.gmane.org>

Gaz wrote:
> Check this piece of code:
> 
>     #now add an image part
>     part = writer.nextpart()
>     part.addheader('Content-Transfer-Encoding', 'base64')
>     body = part.startbody('image/jpeg')
>     base64.encode(open('c:\check.jpg', 'rb'), body)
> 
> I get the following error:
> 
> IOError: [Errno 2] No such file or directory: 'c:\\check.jpg'
>       args = (2, 'No such file or directory')
>       errno = 2
>       filename = r'c:\check.jpg'
>       strerror = 'No such file or directory'
> 
> Dont know why im getting such error, the file is there. Perhaps wrong
> filetype? Wrong read mode?

What does it show if you put "print os.listdir('c:/')" on the line 
before the open?  (You'll obviously need to import os first.)

-Peter



From steven.bethard at gmail.com  Tue Feb  7 11:10:19 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 07 Feb 2006 09:10:19 -0700
Subject: Natural Language Date Processing.
In-Reply-To: <mailman.1544.1139316354.27775.python-list@python.org>
References: <mailman.1544.1139316354.27775.python-list@python.org>
Message-ID: <i4-dnVTcEIzuW3XeRVn-vQ@comcast.com>

Andrew Gwozdziewycz wrote:
> I've been looking recently for date processing modules that can parse 
> dates in forms such as "next week" or "6 days from next sunday".

This is, in fact, a fairly difficult problem in general.  See the TERN_ 
competition that's currently held yearly on this task.  There are a few 
taggers available that do this at:

     http://timex2.mitre.org/taggers/timex2_taggers.html

But none of them are available as Python modules.  You might be able to 
port the Perl script there, but it won't do as well as the ATEL program 
from CU which uses machine learning techniques.

.. _TERN: http://timex2.mitre.org/tern.html

STeVe


From singletoned at gmail.com  Fri Feb 10 04:59:43 2006
From: singletoned at gmail.com (Ed Singleton)
Date: Fri, 10 Feb 2006 09:59:43 +0000
Subject: random playing soundfiles according to rating.
In-Reply-To: <1139456949.087347.173800@o13g2000cwo.googlegroups.com>
References: <1139456949.087347.173800@o13g2000cwo.googlegroups.com>
Message-ID: <34bb7f5b0602100159w2e793c87i@mail.gmail.com>

On 8 Feb 2006 19:49:09 -0800, kp87 at lycos.com <kp87 at lycos.com> wrote:
>
> I am a little bit stuck ....
>
> I want to play a bunch of soundfiles randomly, but i want to give each
> soundfile a rating (say 0-100) and have the likelihood that the file be
> chosen be tied to its rating so that the higher the rating the more
> likely a file is to be chosen.  Then i need some additional flags for
> repetition, and some other business. I am guessing a dictionary would
> be a great way to do this, with the key being the soundfile name and
> the values being my ratings and other flags & associated data.

It depends how accurate you want the likelihood to be and how
important performance is.

I was thinking about this in respect of queueing mp3s from my
collection (10,000+) to be played based on a 1-5 star rating (five
stars is five times more likely to be played than 1 star).

If speed is no issue (for example you can queue an mp3 while the
current one is playing), then Ben's solution is the classic one. 
Store the total of all your scores (or calculate it on the fly if you
don't have too many files), pick a random number up to that total, and
then iterate through all your scores, subtracting each score from the
total, until the total reaches zero, and then play that file.

However that approach gets slower and slower the more files you have
(slower to calculate the total and slower to iterate through the
files).

If speed is more of an issue, you could give up on trying to use a
perfect probability, and just pick 10 (or 50, or 100) files at random,
and then play one of those based on the above approach.

Ed


From reply.in.the.newsgroup at my.address.is.invalid  Mon Feb 20 06:04:46 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Mon, 20 Feb 2006 12:04:46 +0100
Subject: why does close() fail miserably on popen with exit code -1 ?!
References: <1140416836.030294.289800@f14g2000cwb.googlegroups.com>
Message-ID: <jh8jv1tnj7pde63bomimldoh9me6io9a63@4ax.com>

Atanas Banov:
>i ran onto this weirdness today: seems like close() on popen-ed
>(pseudo)file fails miserably with exception instead of returning exit
>code, when said exit code is -1.

Not here.

Python 2.4.2 (#67, Sep 28 2005, 12:41:11) [MSC v.1310 32 bit (Intel)]
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> print os.popen('exit 1').close()
1

-- 
Ren? Pijlman


From mclaugb at nospm.yahoo.com  Mon Feb  6 06:29:33 2006
From: mclaugb at nospm.yahoo.com (mclaugb)
Date: Mon, 6 Feb 2006 11:29:33 -0000
Subject: Scientific Computing with NumPy
Message-ID: <ds7bvh$ab1$2@gemini.csx.cam.ac.uk>

Has anyone recompiled the Scientific Computing package using NumPy instead 
of Numeric?
I need a least squares algorithm and a Newton Rhaphson algorithm which is 
contained in Numeric but all the documentation out there says that Numeric 
is crap and all code should be using NumPy.
Thanks,
Bryan 




From kent at kentsjohnson.com  Wed Feb 15 17:53:09 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Wed, 15 Feb 2006 17:53:09 -0500
Subject: how to get function names from the file
In-Reply-To: <1140041022.500870.141430@g14g2000cwa.googlegroups.com>
References: <1140041022.500870.141430@g14g2000cwa.googlegroups.com>
Message-ID: <43f3ac73$1_2@newspeer2.tds.net>

Petr Jakes wrote:
> I have got names of functions stored in the file. For the simplicity
> expect one row only with two function names: printFoo, printFOO
> In my code I would like to define functions and then to read function
> names from the file, so the functions can be executed in the order the
> function names are stored in a file.
> 
> While trying to read the names from the file I am getting always
> "strings" and I am not able to execute them.
> 
> I would like to write my code so it will look something like:
> 
> def printFoo():
>     print "foo"
> 
> def printFOO():
>     print "FOO"
> 
> # here I would like to read the file with the function names sequences
> # and to create tuple which will contain the function names.

If the functions are in the same module as the calling code:
functions=('printFoo', 'printFOO')
for function in functions:
    globals()[function]()

If the functions are in a 'functions' module:
funcs=('printFoo', 'printFOO')
for function in funcs:
    getattr(functions, function)()

Kent


From kent at kentsjohnson.com  Fri Feb 10 15:07:07 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Fri, 10 Feb 2006 15:07:07 -0500
Subject: Jython inherit from Java class
In-Reply-To: <1139600759.152551.138440@g14g2000cwa.googlegroups.com>
References: <1139344211.725580.263660@g47g2000cwa.googlegroups.com>
	<43eab05b_2@newspeer2.tds.net>
	<1139594138.216488.12730@g14g2000cwa.googlegroups.com>
	<1139600759.152551.138440@g14g2000cwa.googlegroups.com>
Message-ID: <43ecee24_2@newspeer2.tds.net>

Mark Fink wrote:
> I observed something strange when I tried to compile the jython class:
> 'assert' is a keyword, and may not be used as an identifier
> (try -source 1.3 or lower to use 'assert' as an identifier)
>     public static void assert(PyObject test, PyObject message) {

> Looks like something in the Jython core causes the problem
> (org\python\core\Py.java) any Ideas what I can do?

I think jythonc is not compatible with Java 1.5, try compiling with 1.4.

Kent


From peter at engcorp.com  Thu Feb 23 12:19:04 2006
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 23 Feb 2006 12:19:04 -0500
Subject: need help regarding compilation
In-Reply-To: <1140714583.014871.194640@p10g2000cwp.googlegroups.com>
References: <1140714583.014871.194640@p10g2000cwp.googlegroups.com>
Message-ID: <dtkqq4$6ja$1@sea.gmane.org>

fidlee at gmail.com wrote:
> i am new to learning jython...
> 
> 
> i just tried compiling a small piece of code that is given below:
> 
> def fac(x)
>  if x<=1:return 1
>  return x*fac(x-1)

This is invalid Python syntax.  Have you gone through the Python 
tutorial yet?  Doing so is probably a good idea if you haven't.

The problem is that "def" statements must be followed with a colon, like so:

def fac(x):
     if x <= 1:
         return 1
     return x * fac(x-1)

(Note the colon after "def fac(x)".  I've also taken the liberty of 
reformatting the code slightly make it more readable, but that isn't 
necessary to avoid the SyntaxError you were getting.)

-Peter



From tim at pollenation.net  Tue Feb 14 15:46:46 2006
From: tim at pollenation.net (Tim Parkin)
Date: Tue, 14 Feb 2006 20:46:46 +0000
Subject: How can I find a freelance programmer?
In-Reply-To: <op.s4y9v9olix6gqv@charles>
References: <op.s4y9v9olix6gqv@charles>
Message-ID: <43F241B6.9090303@pollenation.net>

Charles wrote:

>Hello,
>
>I am looking for a freelance Python programmer to create a cross-platform  
>application with wxPython.
>Any idea where I could find one?
>Thanks,
>
>  
>
You could ask Steve Holden?  -  that'll be 10% commission Steve! ;-)

Tim Parkin


From plahey at alumni.caltech.edu  Fri Feb 24 09:28:42 2006
From: plahey at alumni.caltech.edu (plahey at alumni.caltech.edu)
Date: 24 Feb 2006 06:28:42 -0800
Subject: problem(s) with import from parent dir: "from ../brave.py import
	sir_robin"
In-Reply-To: <1140790231.071029.236550@i40g2000cwc.googlegroups.com>
References: <1140786637.451247.16210@e56g2000cwe.googlegroups.com>
	<mailman.2396.1140788093.27775.python-list@python.org>
	<1140790231.071029.236550@i40g2000cwc.googlegroups.com>
Message-ID: <1140791322.821030.283060@i39g2000cwa.googlegroups.com>

You don't _need_ to go the PYTHONPATH route (although that works).

Re-read Carsten's post (particularly step 1, see section 6.1.1).

You can use:

sys.path.append('..')
from brave import sir_robin



From http  Wed Feb 22 17:15:04 2006
From: http (Paul Rubin)
Date: 22 Feb 2006 14:15:04 -0800
Subject: listdir() - any way to limit # of file entries?
References: <bunpv1pafuserji1bjft3146c7833h1pu9@4ax.com>
Message-ID: <7xpslfdorb.fsf@ruckus.brouhaha.com>

Peter A. Schott <paschott at no.yahoo.spamm.com> writes:
> Is there any way to build a list of the first 1000 files or so in a folder?

The obvious way is

   first_1000 = os.listdir()[:1000]

That does build a potentially bigger list in memory before chopping
off the 1000 elements, but unless you're running out of memory to hold
the list (which these days probably means millions of files in the
directory), don't worry about it.


From scott.daniels at acm.org  Wed Feb  8 09:55:43 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Wed, 08 Feb 2006 06:55:43 -0800
Subject: Question about idioms for clearing a list
In-Reply-To: <dscdtr$ciu$1@wake.carmen.se>
References: <mailman.1294.1138727665.27775.python-list@python.org>	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>	<mailman.1489.1139232969.27775.python-list@python.org>	<ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>	<mailman.1537.1139297533.27775.python-list@python.org>	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>
	<mailman.1546.1139320907.27775.python-list@python.org>
	<dscdtr$ciu$1@wake.carmen.se>
Message-ID: <43ea053b$1@nntp0.pdx.net>

Magnus Lycka wrote:
>... I sometimes come across things that I once new but had forgotten.

I'm sorry, and I mean no offense, _but_ I think _new_ there is a
lovely typo. :-)  I stopped, corrected it in my head, proceeded,
and then I backed up, put it back and laughed out loud.

--Scott David Daniels
scott.daniels at acm.org


From tdelaney at avaya.com  Thu Feb  9 15:36:57 2006
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Fri, 10 Feb 2006 07:36:57 +1100
Subject: by reference
Message-ID: <2773CAC687FD5F4689F526998C7E4E5F4DB931@au3010avexu1.global.avaya.com>

Rene Pijlman wrote:

> dirvine:
>> I would like to create a dictionary based on a variable [...]
> 
> And what seems to be the problem?

He forgot to read http://www.catb.org/~esr/faqs/smart-questions.html.

And *you* forgot to point him to it ;)

Tim Delaney


From deets at nospam.web.de  Sun Feb  5 12:22:01 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 05 Feb 2006 18:22:01 +0100
Subject: NumPy error
In-Reply-To: <J_pFf.27$LI6.21@fe06.lga>
References: <KLnFf.3$ug1.0@fe04.lga> <44mgs1F2to82U1@uni-berlin.de>
	<J_pFf.27$LI6.21@fe06.lga>
Message-ID: <44mqhoF2ugrgU1@uni-berlin.de>

>>>> from scipy.optimize import fmin
> Overwriting fft=<function fft at 0x012116F0> from scipy.fftpack.basic (was 
> <function fft at 0x011C8A70> from numpy.dft.fftpack)
> Overwriting ifft=<function ifft at 0x01211730> from scipy.fftpack.basic (was 
> <function inverse_fft at 0x011C8AB0> from numpy.dft.fftpack)
> 
> And then I get the following result:
> 
>>>> xopt = fmin(rosen, x0)
> Optimization terminated successfully.
>          Current function value: 0.000066
>          Iterations: 141
>          Function evaluations: 243
> 
>>>> print xopt
> [ 0.99910115  0.99820923  0.99646346  0.99297555  0.98600385]
> 
> Two questions:
> 1. does the "overwriting..." message make sense?
> I uninstalled scipy and numpy and re-installed them.

I get that too - and I have no clue what it means, but I consider it a 
left-over warning or something like that.

> 
> 2. has the algorithm (accuracy level) changed? the result seems different 
> from that reported in
> http://www.scipy.org/Wiki/Documentation?action=AttachFile&do=get&target=scipy_tutorial.pdf
> on page 12.

No idea.

Diez


From peter.mosley at talk21.com  Mon Feb  6 16:58:33 2006
From: peter.mosley at talk21.com (peter.mosley at talk21.com)
Date: 6 Feb 2006 13:58:33 -0800
Subject: Unable to get PIL to load jpeg images
Message-ID: <1139263113.552140.114100@o13g2000cwo.googlegroups.com>

Hello again

I'm still wrestling with Python / Tkinter / PIL.  I have almost got it
to work - on a Fedora Core 1 system I can now display images in a
Tkinter window.  But I also run a Fedora Core 3 system, and when I
tried the same procedures I get the following errors:-

[kpeter at localhost jpgTest]$ python pil_jpg.py
Exception in Tkinter callback
Traceback (most recent call last):
  File "/usr/lib/python2.3/lib-tk/Tkinter.py", line 1345, in __call__
    return self.func(*args)
  File "pil_jpg.py", line 26, in do_something
    a.thumbnail((200,150))
  File "/usr/lib/python2.3/site-packages/PIL/Image.py", line 1422, in
thumbnail
    self.load()
  File "/usr/lib/python2.3/site-packages/PIL/ImageFile.py", line 180,
in load
    d = Image._getdecoder(self.mode, d, a, self.decoderconfig)
  File "/usr/lib/python2.3/site-packages/PIL/Image.py", line 328, in
_getdecoder
    raise IOError("decoder %s not available" % decoder_name)
IOError: decoder jpeg not available

I am running Python 2.3.4, PIL 1.1.5 on a Fedora Core 3 system.  I know
the code is ok, as it runs quite happily under FC1 and Windows.  I've
searched around for clues, and found a few references to this error
message, but quite frankly don't understand what they are saying.

Searching around for files that look as if they may be the jpeg
libraries I can find
/usr/lib/libjpeg.so.62.0.0, and a symbolic link /usr/lib/libjpeg.so.62.
 I think I somehow have to configure PIL to recognise these, but I am
not sure and anyway don't know how to do this.

Can anyone help?

Peter



From mark at mark-fink.de  Sun Feb  5 06:14:42 2006
From: mark at mark-fink.de (Mark Fink)
Date: 5 Feb 2006 03:14:42 -0800
Subject: rexec in jython??
Message-ID: <1139138082.666957.36260@g44g2000cwa.googlegroups.com>

Hi there,
I at the moment port a library from Python to Jython (at lease I try to
do so :-))). The library uses the Rexec to form a type adapter to cast
parameters given as text into the according Jython type. I learned
rexec is not available in Jython. Is something that is commonly used in
Jython for such tasks available?
In general: how do I find such information by myself?
Best Regards,
Mark



From python at rcn.com  Sun Feb  5 23:46:06 2006
From: python at rcn.com (Raymond Hettinger)
Date: 5 Feb 2006 20:46:06 -0800
Subject: Reverse of map()?
References: <1139187820.735831.240570@f14g2000cwb.googlegroups.com>
	<1haardm.1krozue1esby5dN%aleaxit@yahoo.com>
Message-ID: <1139201166.755114.42300@g14g2000cwa.googlegroups.com>

[Alex Martelli]
> map(apply, fn_list, ...) may work, but I doubt it's going to be either
> simple or speedy since the ... must be replaced with as many copies of
> Args and Kwds as there are functions in fn_list, e.g.:
>
> map(apply, fn_list, len(fn_list)*(Args,), len(fn_list)*(Kwds))

The repeat() function in the itertools module was designed to fulfill
this need and consume less memory in the process:

    from itertools import repeat
    n = len(fn_list)
    map(apply, fn_list, repeat(Args, n), repeat(Kwds, n))



> There's no built-in that calls many functions with identical args and
> kwds, since it's a rare need.

Also, it is almost certain that the function calls and their execution
will dominate his runtime.  Even if the fantasied rmap() function
existed, it would be unlikely to help.


Raymond



From steve at holdenweb.com  Tue Feb 28 01:46:18 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 28 Feb 2006 01:46:18 -0500
Subject: type = "instance" instead of "dict"
In-Reply-To: <du0nie$egt$1@daisy.noc.ucla.edu>
References: <1141069989.763239.191140@u72g2000cwu.googlegroups.com>
	<du0nie$egt$1@daisy.noc.ucla.edu>
Message-ID: <du0rjn$tht$1@sea.gmane.org>

James Stroud wrote:
> Cruella DeVille wrote:
> 
>>I'm trying to implement a bookmark-url program, which accepts user
>>input and puts the strings in a dictionary. Somehow I'm not able to
>>iterate myDictionary of type Dict{}
>>
>>When I write print type(myDictionary) I get that the type is
>>"instance", which makes no sense to me. What does that mean?
>>Thanks
>>
> 
> 
> Perhaps you did not know that you can inheret directly from dict, which 
> is the same as {}. For instance:
> 
> class Dict({}):
>    pass
> 
> Is the same as
> 
> class Dict(dict):
>    pass
> 
With the minor exception that the second is valid Python, while the 
first isn't:

  >>> class Dict({}):
  ...    pass
  ...
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
TypeError: Error when calling the metaclass bases
     dict expected at most 1 arguments, got 3
  >>>

It's quite an interesting error message, though ;-)

> Now Dict can do everything that dict ({}) can do, but you can also 
> specialize it:
> 
> py> class Dict(dict):
> ...   def __str__(self):
> ...     return "I am %s long. But you should read the tutorial!" % len(self)
> ...
> py> d = Dict()
> py> d['a'] = 1
> py> d['b'] = 2
> py>
> py> d['a']
> 1
> py> d['b']
> 2
> py> print d
> I am 2 long. But you should read the tutorial!
> 
You're right about that, but we all need a helping hand now and then ...

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From lycka at carmen.se  Tue Feb 21 13:39:51 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Tue, 21 Feb 2006 19:39:51 +0100
Subject: Zope 3?? How do you start it on Windows?
In-Reply-To: <1140532195.134688.57960@g43g2000cwa.googlegroups.com>
References: <1140496495.019513.161010@z14g2000cwz.googlegroups.com>
	<43fadafe$0$38624$edfadb0f@dread12.news.tele.dk>
	<1140532195.134688.57960@g43g2000cwa.googlegroups.com>
Message-ID: <dtfmpn$n45$1@wake.carmen.se>

kbperry wrote:
> Cool thx Matt.  I did finally figure it out, but barely.  Why would you
> want to download and install Zope without creating an instance?  It
> seems kind of dumb to me.

This is a quite normal separation. I think you will find the same
thing among both database systems and various web tool kits. Some
database systems do create an instance on installation, but that's
because those database systems need one main systems database per
install to adminster the other databases. Whether it's Oracle, Zope
or Django, you can have many instances running in one installation.

I installed Trac yesterday. It worked just the same way.

In settings with more than just a few developers, it's quite normal
that system admins install software products such as Zope, while
software developers create Zope instances. Why on earth would you
force the sysadmin to make a Zope instance? He doesn't need one!
The developer probably doesn't have root access, and it isn't his
job to install third party s/w.


From aleaxit at yahoo.com  Thu Feb 16 10:59:03 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Thu, 16 Feb 2006 07:59:03 -0800
Subject: Safe Python Execution
References: <1140058830.477028.26620@f14g2000cwb.googlegroups.com>
Message-ID: <1haudyd.10d1fd6nn4pqhN%aleaxit@yahoo.com>

Graham <graham.abbott at gmail.com> wrote:

> I've been messing around with trying to get a small sandbox like
> environment where i could execute python code in a "safe" way.
> Basically what the old restricted execution module attempted to do.
> I've written a small amount of code to get custom interpreter running,
> but i'm not really sure if its safe.
> 
> The way i'm controlling functionality is with some games and exec, so
> if 'code' was the text code you wanted to execute i run:
> 
> exec code in {'__builtins__':None"}
> 
> obviously this doesn't give you much to play with, but it does remove
> file access and importing as far as i can tell. Can anyone think of a
> hack around this? I assume if it was this easy it would be a module
> already but i figured i would ask.

I suggest compiling the code and examining the names used in the code
object (co_names attribute of the code object which compile returns) --
refuse to execute the code if it mentions, defines or uses any special
name (starting and ending with two underscores).  That, plus removing
almost all builtins as you do here, should be a good start.


Alex


From tuvas21 at gmail.com  Thu Feb  2 15:31:12 2006
From: tuvas21 at gmail.com (Tuvas)
Date: 2 Feb 2006 12:31:12 -0800
Subject: Thread imbalance
Message-ID: <1138912272.382474.13170@g44g2000cwa.googlegroups.com>

I have a program running several threads. One of them must be done
every (Specified time, usually 1 second). The whole point to having a
thread is do this. However, I've noticed the following. When there is
another part of the program that is active, this thread slips into
disuse, ei, it's only ran about once every 4-5 seconds, or perhaps it
waits for a lul in the computing process. How can I ensure that this
does not happen? This thread uses little processing power, so it could
be set to a high priority, if there is a way to do this. Thanks!



From ian at bygrave.me.uk  Sat Feb 11 07:43:23 2006
From: ian at bygrave.me.uk (Ian Bygrave)
Date: Sat, 11 Feb 2006 12:43:23 +0000
Subject: Shortest prime number program
References: <1139652226.869102.310180@g14g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.11.12.43.23.874279@bygrave.me.uk>

On Sat, 11 Feb 2006 02:03:46 -0800, swisscheese wrote:

> I figured someone out there must have written a minimal code size prime
> number generator. I did not find one after a bit of searching around.
> For primes up to 100 the best I could do was 70 characters (including
> spaces):
> 
> r=range(2,99)
> m=[x*y for x in r for y in r]
> [x for x in r if not x in m]

I swore I'd never play Python golf.

p,r=[],range(2,99)
while r:p,r=p+r[:1],[x for x in r if x%r[0]]

And the result's in p.

--Ian Bygrave



From http  Thu Feb 16 01:13:13 2006
From: http (Paul Rubin)
Date: 15 Feb 2006 22:13:13 -0800
Subject: web crawler in python or C?
References: <1140069412.051298.242150@g44g2000cwa.googlegroups.com>
Message-ID: <7xy80b96h2.fsf@ruckus.brouhaha.com>

"abhinav" <abhinavduggal at gmail.com> writes:
> The crawler which will be working on huge set of pages should be
> as fast as possible.

What kind of network connection do you have, that's fast enough
that even a fairly cpu-inefficient crawler won't saturate it?


From harlinseritt at yahoo.com  Wed Feb 22 08:40:51 2006
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 22 Feb 2006 05:40:51 -0800
Subject: Python CGI not working in Firefox but does in IE
Message-ID: <1140615651.847586.258300@f14g2000cwb.googlegroups.com>

I have this Python CGI script running:

[CODE]
print 'Content-type: text/plain\n'

location = 'http://server1.com'

page = '''
<html>
<head>
<meta http-equiv="Refresh" content="0; URL='''+location+'''">
</head>
<body></body>
</html>'''

print page
[/CODE]

It works fine and redirects perfectly when using Internet Explorer but
only shows this in a Firefox window:

[OUTPUT]
<html>
<head>
<meta http-equiv="Refresh" content="0; URL=http://server1.com">
</head>
</html>
[/OUTPUT]

Is there anything I can do to fix this?

Also, is there a redirect command somewhere within Python CGI that can
get this done instead as I would actually prefer to have the CGI code
execute this rather than depend on the HTML to do it.

Thanks,

Harlin Seritt



From c_shyone at yahoo.com  Fri Feb 17 11:15:57 2006
From: c_shyone at yahoo.com (Farel)
Date: 17 Feb 2006 08:15:57 -0800
Subject: Which is faster? (if not b in m) or (if m.count(b) > 0)
In-Reply-To: <43f35f8c$1_3@newspeer2.tds.net>
References: <1139976842.179801.285400@z14g2000cwz.googlegroups.com>
	<pan.2006.02.15.07.44.08.876338@gmx.net>
	<pan.2006.02.15.12.14.46.964790@REMOVETHIScyber.com.au>
	<43f35f8c$1_3@newspeer2.tds.net>
Message-ID: <1140192957.884403.204700@o13g2000cwo.googlegroups.com>

Execellent, Kent. Thank you... and everyone too! I've learned much!



From grante at visi.com  Wed Feb  8 10:56:33 2006
From: grante at visi.com (Grant Edwards)
Date: Wed, 08 Feb 2006 15:56:33 -0000
Subject: Replacing curses (Was: Re: Problem with curses and UTF-8)
References: <mailman.1566.1139345769.27775.python-list@python.org>
	<43E9234B.6030108@v.loewis.de>
	<mailman.1588.1139372460.27775.python-list@python.org>
Message-ID: <11uk55h47lruk18@corp.supernews.com>

On 2006-02-08, Ian Ward <ian at excess.org> wrote:

> I think there are enough escape sequences common to all modern terminals 
> so that I can build a generic curses-replacement for my library.

Why not use termcap/terminfo?

-- 
Grant Edwards                   grante             Yow!  Where does it go when
                                  at               you flush?
                               visi.com            


From peter at engcorp.com  Mon Feb 13 20:04:54 2006
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 13 Feb 2006 20:04:54 -0500
Subject: how do you pronounce 'tuple'?
In-Reply-To: <dsr2f7$8l9$1@reader2.panix.com>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>	<mailman.1857.1139863723.27775.python-list@python.org>	<Wj6If.1606$No6.38150@news.tufts.edu>
	<dsqtq7$mju$1@online.de> <dsr2f7$8l9$1@reader2.panix.com>
Message-ID: <dsrabs$glh$1@sea.gmane.org>

Roy Smith wrote:
> Peter Maas  <peter.maas at somewhere.com> wrote:
> 
>>Latin             n-tuple
>>---------------------------
>>...               ...
>>triplex           triple
>>duplex            duple
>>simplex           simple
> 
> 
> Would a 9-tuple be a nipple?

Perhaps, but if you're a dairy farmer, four nipples would definitely be 
a "two-pull" again...



From kent at kentsjohnson.com  Tue Feb 21 17:41:51 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Tue, 21 Feb 2006 17:41:51 -0500
Subject: Jython Pythonpath question
In-Reply-To: <1140557016.254542.254580@g44g2000cwa.googlegroups.com>
References: <1140557016.254542.254580@g44g2000cwa.googlegroups.com>
Message-ID: <43FB972F.9080408@kentsjohnson.com>

Mark Fink wrote:
> Hi there,
> 
> I have a source file FailFixture.py in the folder
> D:\AUT_TEST\workspace\JyFIT\testutil. Now I want to import the file
> with "import testutil.FailFixture". Unfortunately I could not figure
> out how to set this up. I am convinced that
> "D:\AUT_TEST\workspace\JyFIT" should be included in the pythonpath but
> it does not work. Nor does it work to include this path in the java
> classpath. Any idea whats wrong?

Do you have a file D:\AUT_TEST\workspace\JyFIT\testutil\__init__.py ?

Kent


From gregpinero at gmail.com  Thu Feb  9 16:05:05 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Thu, 9 Feb 2006 16:05:05 -0500
Subject: Fuzzy Lookups
In-Reply-To: <43EBA9DB.2030506@example.com>
References: <1138635665.956131.130630@f14g2000cwb.googlegroups.com>
	<1138670927.377396.78090@g44g2000cwa.googlegroups.com>
	<mailman.1266.1138680617.27775.python-list@python.org>
	<1138721690.283464.71570@g14g2000cwa.googlegroups.com>
	<mailman.1289.1138722708.27775.python-list@python.org>
	<43EBA9DB.2030506@example.com>
Message-ID: <312cfe2b0602091305x2a5b1ad7oedc3dd5c5d453581@mail.gmail.com>

Wow, that looks excellent.  I'll definately try it out.  I'm assuming
this is an existing project, e.g. you didn't write it after reading
this thread?

-Greg


On 2/9/06, name <name at example.com> wrote:
> Gregory Pi?ero ha scritto:
> :
> > If anyone would be kind enough to improve it I'd love to have these
> > features but I'm swamped this week!
> >
> > - MD5 checking for find exact matches regardless of name
> > - Put each set of duplicates in its own subfolder.
>
> Done? http://pyfdupes.sourceforge.net/
>
> Bye,
> luca
>


--
Gregory Pi?ero
Chief Innovation Officer
Blended Technologies
(www.blendedtechnologies.com)


From ptmcg at austin.rr._bogus_.com  Thu Feb  2 18:49:34 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Thu, 02 Feb 2006 23:49:34 GMT
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
Message-ID: <iUwEf.24484$1%5.21795@tornado.texas.rr.com>

<n.estner at gmx.de> wrote in message
news:1138918102.863033.298700 at o13g2000cwo.googlegroups.com...
> Having read previous discussions on python-dev I think I'm not the only
> Python programmer who doesn't particularly like python's "self"
> parameter:
>

How about this decorator-based approach (still need to pick *some* name for
self, I picked "__").

-- Paul



def memberFunction(f):
    def func(self,*args,**kwargs):
        globals()["__"] = self
        return f(*args,**kwargs)
    func.__name__ = f.__name__
    func.__doc__ = f.__doc__
    func.__dict__.update(f.__dict__)
    return func


class Test:
    @memberFunction
    def __init__(x,y):
        __.x = x
        __.y = y

    @memberFunction
    def mult():
        "Multiply the two member vars"
        return __.x * __.y


t = Test(5,4)
print t.mult()
print dir(t)
print t.mult.__doc__







From sw at wordtech-software.com  Mon Feb 13 15:32:38 2006
From: sw at wordtech-software.com (Kevin Walzer)
Date: Mon, 13 Feb 2006 15:32:38 -0500
Subject: Single-file executables
In-Reply-To: <Vq-dnRF0oO9CeW3eRVn-gw@comcast.com>
References: <daadb$43ee6b05$4275d90a$28181@FUSE.NET>
	<Vq-dnRF0oO9CeW3eRVn-gw@comcast.com>
Message-ID: <43F0ECE6.3090108@wordtech-software.com>

Larry Bates wrote:
> Kevin Walzer wrote:
>> Which of the Windows/Unix package builders for Python applications is
>> capable of creating single-file executables? I'm thinking of:
>>
>> 1. py2exe
>> 2. Mcmillan Installer/PyInstaller
>> 3. cxfreeze
>>
>> The apps I've seen created by py2exe aren't single-file at all, the
>> install folder is full of files besides the main program. I'm looking
>> for a solution that stuffs all libraries, scripts, and the Python
>> runtime into one file.
>>
> 
> I use py2exe and Inno Installer and get to a single file installation
> that way.  Inno creates setup.exe as a single file.  That file may
> actually expand into several files upon installation (which is
> typical as you want readme.txt, history.txt, other documentation,
> maybe example .ini file, etc.).  IMHO the fact that py2exe doesn't
> create a single exe is a non-problem.  What other Windows app when
> installed only installs <progname>.exe and NO OTHER FILES.  Inno
> solves the problem of only having a single .exe to DISTRIBUTE
> which I think is the real goal.  Inno also lets you automate the
> creation of desktop/quicklaunch/startbutton icons, insertion of
> items into the registry, and a whole host of other "stuff" that
> normally must be done to complete a proper installation.  With some
> plug-ins, you can even have it get updates from a website (I have
> not tested this, but I've read about it).
> 
> If you want to "obscure" your programs use the bundle option and
> py2exe imbeds the .ZIP file inside the .EXE file (making it
> somewhat harder to hack).
> 
> -Larry Bates

It's not so much for "obscurity" as simplicity.

Tcl/Tk allows you to pack everything into a single file: it's called a
"starpack." You can use an installer, but it's not necessary--the file
can be uninstalled by moving it to the recycle bin.

On Mac OS X, applications are typically deployed as a "bundle"--the .app
extension is actually a directory that looks like a single file. All the
libraries, etc. can be placed inside.

The install directories that are created by py2exe, at least the ones
I've seen in the past, seem messy by comparison. As I understand it, the
latest version allows you to do "one-file-deployment," which is what I'm
looking for. PyInstaller also does this, from what I'm told.

So, I'm interested in that type of functionality.

-- 
Kevin Walzer
iReveal: File Search Tool
http://www.wordtech-software.com


From rainbow.cougar at gmail.com  Wed Feb 15 09:49:29 2006
From: rainbow.cougar at gmail.com (rainbow.cougar at gmail.com)
Date: 15 Feb 2006 06:49:29 -0800
Subject: 'could not open display' error when import gtk - how fix?
In-Reply-To: <1139967632.229372.8360@g47g2000cwa.googlegroups.com>
References: <1139967632.229372.8360@g47g2000cwa.googlegroups.com>
Message-ID: <1140014969.204811.104030@z14g2000cwz.googlegroups.com>


seberino at spawar.navy.mil wrote:
> Why can't I import gtk (pygtk) module?  It appears gtk module want X
> perms?
>
>
> >>> import gtk
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "/usr/lib/python2.3/site-packages/gtk-2.0/gtk/__init__.py", line
> 37, in ?    from _gtk import *
> RuntimeError: could not open display

An error like this usually happens when X security is on, or the
display name isn't known.

#before you run it, try (for csh):
setenv DISPLAY host:0.0
#where host is your computers name

#If that doesn't get it, do:
xhost +



From heikki at osafoundation.org  Wed Feb 22 16:07:46 2006
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Wed, 22 Feb 2006 13:07:46 -0800
Subject: Multi-threaded SSL
In-Reply-To: <1140240776.132359.57800@g14g2000cwa.googlegroups.com>
References: <1140240776.132359.57800@g14g2000cwa.googlegroups.com>
Message-ID: <TrGdnQnQKcY5T2HenZ2dnUVZ_tidnZ2d@comcast.com>

Kris Kowal wrote:
> I started with Twisted, but, having looked as far as I can see, SSL is
> either not implemented, or not documented for that library.  There are
> hints that it's in the works, but that's all.  So, I've moved on.
>
> I'm using PyOpenSSL on a Debian box, and I started with the ActiveState

Twisted actually supports SSL if you have PyOpenSSL installed. Alex
already pointed that out.

If you want to work with Twisted, alternative solutions for the SSL part
could be TLS Lite (see http://trevp.net/tlslite/) or M2Crypto
(http://wiki.osafoundation.org/bin/view/Projects/MeTooCrypto), both of
which provide an alternative SSL transport implementation for Twisted.

-- 
  Heikki Toivonen


From s323 at mail.ru  Tue Feb 14 07:17:36 2006
From: s323 at mail.ru (Sergey)
Date: Tue, 14 Feb 2006 15:17:36 +0300
Subject: file names longer than MAX_PATH under Windows 2003
References: <mailman.1897.1139918374.27775.python-list@python.org>
Message-ID: <dsshp1$104o$1@news.rtcomm.ru>


"Tim Golden" <tim.golden at viacom-outdoor.co.uk> wrote in message news:mailman.1897.1139918374.27775.python-list at python.org...
[Sergey]

>Not to state the obvious, but can you cut-and-paste that long
>string (the one starting with \\?\e:\...) from the Python
>interpreter into the [S]tart [R]un [O]pen field to see what
>comes up? I'm just trying to make sure of the most straightforward
>fact: that the file you've got there definitely does exist!

Sorry, it was my error - there was extra backslash in the middle of path.
\\?\path works OK. 




From steve at REMOVETHIScyber.com.au  Sun Feb 12 09:13:11 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Mon, 13 Feb 2006 01:13:11 +1100
Subject: Is python very slow compared to C
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<pan.2006.02.12.01.03.10.918456@REMOVETHIScyber.com.au>
	<1139751088.720150.80010@g43g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.12.14.13.10.48628@REMOVETHIScyber.com.au>

On Sun, 12 Feb 2006 05:31:28 -0800, =?iso-8859-1?q?Luis_M._Gonz=E1lez?=
wrote:

> You are right, we all know that, but I think the person who asked this
> question doesn't want to hear a sales pitch. He asked a very specific
> question regarding execution speed.

Read his post again. He didn't ask a specific question at all, and he
certainly didn't mention execution speed. He asked a vague, meaningless
question about whether Python was "slow compared to C".

Slow to learn? No, Python is easier to learn than C.

Slow to compile? No, Python handles compiling to byte-code transparently,
you will rarely even notice it.

Slow to debug? That depends on the nature of the bug, but generally no.
It is much easier to write correct code the first time in Python than in
C, and even if the code isn't correct, Python makes it easier (and
therefore faster) to debug it.

Slow to execute? No, for many common tasks execution speed is either fast
enough regardless of the language, or it is limited by things like user
input, I/O, memory or other factors independent of the language the code
is written in.

If the task is limited by the CPU and not I/O etc., pure Python code with
no C extensions or Psycho optimizations might be slower than C code, but
that tells us virtually nothing about whether it is too slow. After all,
my car is slower than a F-11 fighter plane, but my car is plenty fast
enough for driving to the shop and back, and a car is a far more practical
solution to the task even though a F-11 would be faster.



-- 
Steven.



From python at rcn.com  Wed Feb 15 21:56:56 2006
From: python at rcn.com (Raymond Hettinger)
Date: 15 Feb 2006 18:56:56 -0800
Subject: Soduku
References: <1139967167.960780.171360@o13g2000cwo.googlegroups.com>
	<mailman.1932.1139968309.27775.python-list@python.org>
Message-ID: <1140058616.478084.117470@o13g2000cwo.googlegroups.com>

[Jack Diederich]
> Is my math off or does 27ms mean 0.027 seconds? On my laptop (1.3GHz)
> an empty python program takes 10ms to run (0.010 secs).  I ask out of
> vanity, my own solver takes .15 seconds to run (20 seconds for a 16x16 grid).

Comparisons for individual puzzles are likely to be meaningless.  Any
algorithm is at some point forced to try out assumptions from many
possiblities.  A lucky or unlucky string of guesses would throw-off the
comparisons.  Ideally, they should run hundreds of sample puzzles and
include a good many that involve making mulitple levels of assumptions.
 Some of the easy puzzles solve readily without a depth-first search
(so a good chuck of the code may go unexercised).  Another comparison
issue is the choice of data structures for input, working data, and
output -- the accessing differing structures may cloud the comparison
of difference algorithms.

FWIW, my version is listed on ASPN:
    http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/473893


Raymond



From tuvas21 at gmail.com  Mon Feb  6 12:52:22 2006
From: tuvas21 at gmail.com (Tuvas)
Date: 6 Feb 2006 09:52:22 -0800
Subject: Thread imbalance
In-Reply-To: <oxLFf.30420$H71.26518@newssvr13.news.prodigy.com>
References: <1138912272.382474.13170@g44g2000cwa.googlegroups.com>
	<ds3d35$mo6$2@bagan.srce.hr>
	<mailman.1427.1139097680.27775.python-list@python.org>
	<ds55tb$n00$1@bagan.srce.hr>
	<lukcu19iaqamsm5ohs618ckp169csrq8ql@4ax.com>
	<ds698k$n5l$2@bagan.srce.hr>
	<1139197849.994966.150810@z14g2000cwz.googlegroups.com>
	<oxLFf.30420$H71.26518@newssvr13.news.prodigy.com>
Message-ID: <1139248342.222672.304350@o13g2000cwo.googlegroups.com>

The read function used actually is from a library in C, for use over a
CAN interface. The same library appears to work perfectly find over C.
I wrote an extention module for it. The function t_config is the
threaded function that will call a function called config once per
second. Note the time.time() timer

def t_config():
  while (TRUE):
    if(can_send_config):
      config()
      ts=time.time()
      time.sleep(1)
      if time.time()-ts>1.5:
        print "Long time detected
    else:
      time.sleep(.1)

When nothing is happening, the thread runs pretty consistantly at 1
second. However, when it is doing IO through this C function or
whatever, the length of time increases, for the time.sleep() function.
Kind of strange, isn't it? I can explain in more detail if it's needed,
but I don't know how much it'll help...



From invalidemail at aerojockey.com  Sat Feb 11 10:11:39 2006
From: invalidemail at aerojockey.com (Carl Banks)
Date: 11 Feb 2006 07:11:39 -0800
Subject: appending to a list via properties
References: <1139605443.823899.141260@g47g2000cwa.googlegroups.com>
Message-ID: <1139670699.632590.148760@g14g2000cwa.googlegroups.com>

Lonnie Princehouse wrote:
> Here's a curious hack I want to put up for discussion.  I'm thinking of
> writing a PEP for it.

A minor library change wouldn' t need a PEP.

> Observation
> -----------------
> I found myself using this construct for assembling multiple lists:
>
>     foo = []
>     qux = []
>
>     while some_condition:
>        a, b = calculate_something()
>        foo.append(a)
>        qux.append(b)
>
> Not elegant!

I don't agree; however:

>     class better_list (list):
>         tail = property(None, list.append)

This is an impressive, spiffy little class.

> Well?

I suspect it's too sneaky and not commonly useful enough to get serious
consideration for the standard library.  But definitely submit it to
Python Cookbook:
http://aspn.activestate.com/ASPN/Python/Cookbook/

Carl Banks


P.S. to get rid of temporary variables while using regular lists:

growing_lists = foo,qux
while some_condition:
    for (s,x) in zip(growing_list,calculate_something()):
        list.append(s,x)

No I don't really recommend it.



From fuzzyman at gmail.com  Wed Feb 15 06:40:44 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 15 Feb 2006 03:40:44 -0800
Subject: Pythonic gui format?
In-Reply-To: <1139923105.939191.200660@z14g2000cwz.googlegroups.com>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<43f11990$0$667$626a54ce@news.free.fr>
	<1139923105.939191.200660@z14g2000cwz.googlegroups.com>
Message-ID: <1140003644.055366.316620@g47g2000cwa.googlegroups.com>


Gregory Petrosyan wrote:
> > > Isn't it ugly a bit?
> >I'd even say 'ugly 16-bits' !-)
>
> You are right of course. Those  "examples"  are really bad, and, most
> of all, really un-pythonic.
>
> Thanks for JSON. It's more clean&simple than XML, but my main idea is
> to remove any extra layer between Python and GUI. I want all GUI
> elements/data to be directly accessible from Python (without extra
> libraries).
> Your dicts example is nice, but this  approach (and some others) lacks
> one important feature: ordering of GUI elements. In XML, the order of
> all elements is specified, and with dicts (or with very clean Georg's
> model) it is not. (BTW remember topics about ordered dicts...)
>

ConmfigObj is *another* configuration module that has a nice syntax for
storing data. It will effectively store nested dicts with single items
or lists for values. You access members using the mapping protocol
(ordinary dictionary syntax), but members *are* ordered. (ConfigObj
instances are effectively ordered dictionaries as well.)

You say you don't want an 'extra layer' between your GUI  and Python -
but your approach of using XML has the same drawback. Storing your 'GUI
configuration' in a text based format is a nice idea, but you will need
*something* to do the translation.

    http://www.voidspace.org.uk/python/configobj.html

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml

> I think that there should be a way for solving this problem, and I'll
> certainly try to find it.
> Thanks for your help.



From onurb at xiludom.gro  Wed Feb 22 03:43:14 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Wed, 22 Feb 2006 09:43:14 +0100
Subject: redirecting to a content page
In-Reply-To: <1140565482.106127.276650@z14g2000cwz.googlegroups.com>
References: <1140565482.106127.276650@z14g2000cwz.googlegroups.com>
Message-ID: <43fc2446$0$30861$636a55ce@news.free.fr>

Shreyas wrote:
> I am a new user writing some scripts to store data entered via a
> browser into a database.  I have several content pages, and one
> "processing" page.  A content page often has a form like this:
> 
> <form method=POST action=processing.py>
> <input type=text name=username>
> ...
> 
> And the processing page goes like this:
> 
> form = cgi.FieldStorage()
> ## do some work, put data into the db
> 
> The thing is, processing.py doesn't have any content that I want to
> display to the user.

And this is a GoodThing(tm). A successful post should always be followed
by a redirect.

>  I would ideally like processing.py to seamlessly
> send the user back to the content page that it came from, perhaps with
> some parameter tweaks.

import cgi

print "Location: %s\n\n" % url_of_the_page_you_want_to_redirect_to

(snip)

> Please let me know if there's a way to do this, or if my general
> approach (having such a processing page) is off.

Nope, having a separate script doing the form processing, then
redirecting  is the right thing to do.

> 
> - I did try searching for this in the archive but am not even entirely
> sure what it is called...

It's a redirection. If you are to work with CGI (or any other web
programming solution FWIW), you'd better know the HTTP protocol.


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From rzantow at gmail.com  Mon Feb 13 15:09:10 2006
From: rzantow at gmail.com (Rick Zantow)
Date: Mon, 13 Feb 2006 15:09:10 -0500
Subject: Another n00b: Removing the space in "print 'text', var"
References: <43efb1ba$0$14855$c3e8da3@news.astraweb.com>
	<43f05016$0$1408$626a54ce@news.free.fr>
Message-ID: <Xns97699A2539C80rzed@208.49.80.253>

bruno at modulix <onurb at xiludom.gro> wrote in
news:43f05016$0$1408$626a54ce at news.free.fr: 

> HappyHippy wrote:
>> More of a minor niggle than anything but how would I remove the
>> aforementioned space?
> 
> 
>> eg.
>> strName = 'World'
>> print 'Hello', strName, ', how are you today?'
> 
> 
> Already got an anwser, now just a coding-style suggestion: hungarian
> notation is *evil*. And even *more* evil with a dynamically-typed
> language. 
> 

Bruno - 

<OT>
Although I agree with you in part (about the horror that is often called 
"Hungarian notation"), I would have to say that this particular use of 
it does not demonstrate that evil. What I consider bad about it is that 
people include an indication of datatype in the name, so that, say, the 
name of a C int would begin with the letter 'i'. The evil comes about 
when a different algorithm causes a change in the datatype of the 
variable (it is, for instance, redefined as a long, or a char), but the 
name itself does not change. From that point on, when encountering a 
variable whose name begins with 'i', it's not possible to be sure that 
it is an int, regardless of the coding convention involved. 

However, that is not how Hungarian notation was meant to be used. 
Instead, the prefix was to indicate the function of the variable, not 
its datatype. Thus, ctrXXX would be a counter (according to some 
hypothetical coding standard). If the datatype changed, the name would 
not have to change, as long as the variable's function remained the 
same.

In the HappyHippy example, the 'str' prefix does coincide with Python's 
indicator of a string class, as it happens. It is not clear that it need 
be more than coincidence, though. A string of bytes need not be of class 
str, and text need not be contained in a Python str, but the 'str' 
prefix could easily be attached to anything that indicated strung-
together data under some coding standard or another. Specifically, it 
wouldn't bother me greatly to discover that strXXX contained a normal 
Python string at some point and a Unicode string at another -- the 
function of strXXX would be the same in either case.

Dealing with the contents of strXXX might be a problem, of course, but 
that would also be true whenever the datatype of its contents could 
vary, regardless of its name. In a dynamic language, that variance could 
easily happen, which appears to be the basis for your "even *more* 
evil" comment. Appending a pseudotype prefix to an object's name doesn't 
fix the situation, but it doesn't really make it worse. A prefix of 
'str' should be enough to warn a maintainer not to assume the field is 
an accumulator or a function name, and maybe a little more than that, 
but in any event, in any language, the only sure way to know how an 
object is being used is to examine its context in the source. Anything 
naming convention (or comment, for that matter), is just dropping 
crystallized hints that are relavent to some particular moment in time. 
It is folly to assume they are necessarily still relevant.

Now it could be that I'm misinterpreting your objection to Hungarian 
notation. If so, I'd be interested in hearing what it is. Although I 
don't imagine any of this is actually on topic in the Python group.
</OT>

-- 
rzed


From robert.kern at gmail.com  Thu Feb  9 11:49:52 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 09 Feb 2006 10:49:52 -0600
Subject: importing maple into python
In-Reply-To: <b329e003819748bab0d5562fd17beffd@ghytred.com>
References: <dd8ee248015b4389803bf6ff954758f1@ghytred.com>
	<b329e003819748bab0d5562fd17beffd@ghytred.com>
Message-ID: <dsfrrc$fl7$1@sea.gmane.org>

walter kehowski wrote:
> Hello,
> 
> Is there for a python program to call maple?

http://sage.sourceforge.net

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From python.pan at gmail.com  Wed Feb  1 18:50:21 2006
From: python.pan at gmail.com (Runsun Pan)
Date: Wed, 1 Feb 2006 17:50:21 -0600
Subject: A class with built-in doctest feature ?
Message-ID: <5af1b8bc0602011550tacc21f5v8705cab78bc2c3da@mail.gmail.com>

I intend to use the doctect heavily. For this I am thinking of
coding a class that comes with a built-in doctest functionality.
I'd like to seek for input before I start.

The idea is to have a class MyObj from where all my other
classes will subclass.

lets say:

   class C(MyObj):
        ''' This C
          (some doctest here) ---- doctest.1
        '''
        def func1(self):
             ''' This is C.func1
                (some doctest here) --- doctest.2
             '''
             blah blah blah
             return blah

Now, after the above class defintion, I can just do:

C( ).doctest( )

and it will go through doctest.1 and doctest.2 and report the
test results

What is the better way to make such a MyObj ?

The applications of this sort of built-ins are not limited to
a doctest. Similar to the built-in __doc__ that offers some sort
of documentation, a mechnism like what I am proposing can
provide "customization on the fly" feature to allow manipulations
of the doctext at run-time. For example,

C( ).toHtml( )

to convert the __doc__ to a webpage by converting it throu
reStructuredText.

--
~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~
Runsun Pan, PhD
python.pan at gmail.com
Nat'l Center for Macromolecular Imaging
http://ncmi.bcm.tmc.edu/ncmi/
~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~


From donn at drizzle.com  Wed Feb 22 02:54:21 2006
From: donn at drizzle.com (Donn Cave)
Date: Wed, 22 Feb 2006 07:54:21 -0000
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com>
	<mailman.2160.1140440898.27775.python-list@python.org>
	<1140454473.335788@jetspin.drizzle.com>
	<pan.2006.02.20.21.59.12.636908@REMOVETHIScyber.com.au>
	<1140490302.639049@jetspin.drizzle.com>
	<43FAD2C2.7080908@REMOVEMEcyber.com.au>
	<donn-F5C9CE.09462721022006@gnus01.u.washington.edu>
	<pan.2006.02.21.22.15.59.192973@REMOVETHIScyber.com.au>
Message-ID: <1140594860.317484@jetspin.drizzle.com>

Quoth Steven D'Aprano <steve at REMOVETHIScyber.com.au>:
...
| Do you honestly believe that the CPU doesn't have to interpret the machine
| code, or are you just deliberately playing silly buggers with language?

I don't care whether the CPU has to interpret machine code.  Are
you suggesting that we might in normal conversation wish to use
the term interpreter to mean CPU, like "what kind of interpreter
does your computer have?", that kind of thing?

| > Your paragraph above that starts with "No of course not",
| > even omits a point that everyone understands, you can in
| > fact expect a .py file will work independent of machine
| > architecture - like any interpreted language.
|
| Amazing. In your previous post you were telling everybody how the
| *disadvantage* of interpreted programs is that they won't run unless the
| interpreter is present, and in this post you are telling us that
| interpreted languages will just work. What happened to the requirement for
| an interpreter?

Look, this is my last post on this matter, because you have evidently
reached a point where every statement has to be spelled out in excruciating
detail to avoid absurd interpretations.  "will work independent of machine
architecture" does not declare that it is absolutely guaranteed to work -
after all, it may have some other flaw that will prevent it from working
anywhere.  It just says that if it doesn't work, it isn't because it
tried to execute on the wrong machine architecture - the file is machine
architecture independent.  You know that, you know I know that.  What
is the fucking problem?

| In order to force "interpreted language" and "compiled language" into two
| distinct categories, rather than just two overlapping extremes of a single
| unified category, you have to ignore reality. You ignore interpreted
| languages that are compiled, you ignore the reality of how machine code is
| used in the CPU, you ignore the existence of emulators, and you ignore
| virtual machines.

Anyone with an interest in computer programming is likely to know what
microcode means, that there are emulators, virtual machines, etc.  You
might find the UCSD Pascal system interesting, to harken back to the
early days of my experience with computers, a fascinating twist on the
interpreted/compiled story.  Interesting as perspective, but it wouldn't
change the way we apply these words to Python.

	Donn Cave, donn at drizzle.com


From steve at holdenweb.com  Sat Feb 25 10:04:33 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 25 Feb 2006 10:04:33 -0500
Subject: python-list/python-dev quoting style
In-Reply-To: <dtpo4l$jml$1@gemini.csx.cam.ac.uk>
References: <dtml9t$367$1@gemini.csx.cam.ac.uk>
	<dtnjdt$n9q$1@panix2.panix.com>	<dto7um$ils$1@gemini.csx.cam.ac.uk>
	<dtoti4$nmj$1@panix3.panix.com>	<dtouti$327$1@gemini.csx.cam.ac.uk>	<1200ktdnodqqr26@corp.supernews.com>
	<dtpo4l$jml$1@gemini.csx.cam.ac.uk>
Message-ID: <dtprlu$4ol$1@sea.gmane.org>

Some lurker calling himself "me" wrote:
> [Aahz]
> 
>>>>And who is "me", anyway?
> 
> 
> [me]
> 
>>>It's hard to believe that you don't understand who "me" is in
>>>a conversation between two people,
> 
> 
> [Grant Edwards]
> 
>>Since when is a Usenet news group a conversation between two
>>people?
> 
> 
> Now there are three. At that time only two people had participated in 
> this thread.
> 
> Is there really confusion about who "me" is? I find that mystifying.

Well, *I* know who "me" is. That makes you an impostor.

see-how-nobody-knows-who-you-are-now-ly y'rs  - steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From silverburgh.meryl at gmail.com  Sun Feb 26 15:53:32 2006
From: silverburgh.meryl at gmail.com (silverburgh.meryl at gmail.com)
Date: 26 Feb 2006 12:53:32 -0800
Subject: How can I find the remainder when dividing 2 integers
In-Reply-To: <46ehr1FarmcsU1@uni-berlin.de>
References: <1140984473.723258.70050@e56g2000cwe.googlegroups.com>
	<46egiuFanujjU2@uni-berlin.de>
	<1140985687.324979.153730@e56g2000cwe.googlegroups.com>
	<46ehr1FarmcsU1@uni-berlin.de>
Message-ID: <1140987212.515152.46050@v46g2000cwv.googlegroups.com>

Can you please tell me what is the meaning of
 UnboundLocalError: local variable 'colorIndex' referenced before
assignment 

in general?



From bill.scherer at verizonwireless.com  Fri Feb 17 11:25:48 2006
From: bill.scherer at verizonwireless.com (Bill Scherer)
Date: Fri, 17 Feb 2006 11:25:48 -0500
Subject: Python Oracle Interace on Solaris
In-Reply-To: <78E6A2FC276AD8428A8E2DBBB540855E038A0B7F@NYOBGCEXMB21.uswin.ad.vzwcorp.com>
References: <78E6A2FC276AD8428A8E2DBBB540855E038A0B7F@NYOBGCEXMB21.uswin.ad.vzwcorp.com>
Message-ID: <43F5F90C.40205@verizonwireless.com>

kenneth.s.chan at gmail.com wrote:

> I am trying to use Python to do queries on a Oracle database using a
> Solaris box. I have seen tools such as cx_Oracle which would be good
> except that my Solaris box does not have an Oracle installation. Do I
> need to have an Oracle installation on my Solaris box to access the
> Oracle database (which is on another machine)? Are there ways to access
> an Oracle database and do queries without having a local copy of Oracle
> installed? Thanks.
>
Not really. You need an Oracle client to talk to an Oracle database. But 
you don't need a full db installation... Try the instant client:

http://www.oracle.com/technology/tech/oci/instantclient/instantclient.html

Recent versions of cx_Oracle build with that just fine.

> -- 
> http://mail.python.org/mailman/listinfo/python-list
>



From roy at panix.com  Mon Feb 20 11:33:19 2006
From: roy at panix.com (Roy Smith)
Date: Mon, 20 Feb 2006 11:33:19 -0500
Subject: Processing text using python
References: <1140451760.998278.90430@g43g2000cwa.googlegroups.com>
Message-ID: <roy-EC8E7A.11331920022006@reader2.panix.com>

In article <1140451760.998278.90430 at g43g2000cwa.googlegroups.com>,
 "nuttydevil" <sjw28 at sussex.ac.uk> wrote:

> Hey everyone! I'm hoping someone will be able to help me, cause I
> haven't had success searching on the web so far... I have large chunks
> of text ( all in a long string) that are currently all in separate
> notebook files. I want to use python to read these strings of text,
> THREE CHARACTERS AT A TIME. (I'm studying the genetic code you see, so
> I need to read and analyse each sequence one codon at a time
> effectively.) Does anyone have any idea of how to do this using python?

Don't reinvent the wheel.  Take a look at http://www.biopython.org/.


From tim.golden at viacom-outdoor.co.uk  Tue Feb 14 12:07:36 2006
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 14 Feb 2006 17:07:36 -0000
Subject: Win32_Process.Create -- not starting process
Message-ID: <9A28C052FF32734DACB0A288A3533991044D2563@vogbs009.gb.vo.local>

[abcd]

| I am using Python to create a process on another computer.  Both
| computers are on the same domain with admin privileges.
| 
| On computer B I have a batch script which starts a python 
| script.  From computer A I am doing the following:
| 
| import wmi
| w = wmi.WMI("1.2.3.4")
| p = w.new("Win32_Process")
| pid, retVal = p.Create(CommandLine="C:\\a_script.bat")
| print pid, retVal
| 
| The output I get is, 1218 0  ....0 = "Successful Completion"

| ....however the python script that is called from the batch script
| never seems to run or at least only for a split second.  Sometimes I
| see python.exe appear in the task manager on computer B for a split
| second then it goes away.  So I went to computer B and double clicked
| on the batch script, and sure enough a command opened up and 
| the python script was running...and stayed running...no problem.   
| I should mention, that sometimes it will execute the batch script and 
| the Python script will run and stay running.  That has only happened 
| after trying to do "p.Create(CommandLine....)" more than once, but not

| every time I try.
| 
| Any ideas why its not working for me remotely....or why its random?
| These are win xp machines with no firewalls running.

OK, let me say up front: there's nothing terribly obvious. Just in 
case you haven't, it's probably worth your running the latest 
wmi module -- 1.0rc6 at time of writing -- which makes slightly
cleaner the interface to WMI classes. However, that's not the
problem here, as the syntax you're using above works in 0.6b
and in 1.0rc6 (I just tried both).

I *think* that what you're seeing is that the script isn't running
in the environment you're expecting, and is then swallowing the
problem. Can you confirm whether or not the simplest possible
Python script does indeed run and produce the expected result?
You may well have to specify an explicit path for Python,
give explicit paths for output files and so on.

My test case, for example, which ran consistently, was: 

## on the remote machine

<c:\temp\wmi-test\test.cmd>
c:\python23\python c:\temp\wmi-test\test.py
</c:\temp\wmi-test\test.cmd>

<c:\temp\wmi-test\test.py>
import os
f = open ("c:\\temp\\wmi-test\\test.txt", "w")
f.write ("%s\n" % os.getcwd ())
for k, v in os.environ.items ():
  f.write ("%s => %s\n" % (k, v))
f.close ()
</c:\temp\wmi-test\test.py>

## on my machine

<code>
import wmi
c = wmi.WMI ("vogbp364") # obviously your remote machine name
#
# Slightly cleaner syntax new to wmi 1.0
#
c.Win32_Process.Create (CommandLine=r"c:\temp\wmi-test\test.cmd")
</code>

Obviously the extent to which you'll need to
specify things will be affected by the system-level
as opposed to user-level info on each machine.

Hope that helps. Feel free to get back if it doesn't.

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
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From lycka at carmen.se  Thu Feb  9 11:12:46 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 09 Feb 2006 17:12:46 +0100
Subject: New editions of several Python books.
Message-ID: <dsfplv$ptp$1@wake.carmen.se>

While I work at a company that uses Python a lot (and would
have had a hard time finding such a place a few years ago) I
don't really have a clear opinion on whether Python's marketshare
(or mindshare) is growing significantly. Perl seems to be in
decline, but on the other hand, Ruby is attracting a lot of people.

One interesting thing I noticed when I visited Amazon.com
today, was that several publishers are busy making new
editions of their Python books. These classics are in the
pipeline:

Python Essential Reference (3rd Edition)
by David M. Beazley (Paperback - February 24, 2006)

I have the 1st ed. Just as with Martelli's Nutshell-book, this is a
really good reference book. (Or was in previous editions at least.)

Python, Second Edition : Visual QuickStart Guide (2nd Edition)
by Chris Fehily (Paperback - April 14, 2006)

In my opinion one of the best beginner books. Straight forward and
also affordable.

Programming Python, 3rd edition
by Mark Lutz (Paperback - July 2006)

Never a favourite of mine really, but a popular book...

And this is already reissued it seems:

Python Programming for the Absolute Beginner, Second Edition
by Michael Dawson (Paperback - November 8, 2005)

Finally...

Beginning Python: From Novice to Professional
by Magnus Lie Hetland (Paperback - September 26, 2005)

...was more or less a 2nd edition of Magnus' "Practical Python".

There is also a "Python for Dummies" on its way at last. (I'm not
sure Python *is* for dummies though. Despite being so easy to learn
and use, it mainly seems to attract smart and experienced people, why
else would Python programmers be among the best paid programmers?)

Somehow, the fact that so many books are reissued in a fairly short
period, makes me feel that the publishers feel that the winds are
blowing our way...

Any thoughts on this?

I don't see any similar republish trends among the other scripting
languages. (Although Ruby on Rails seems to  attract some attention --
four books in the pipeline.)



From jth01 at arcor.de  Sat Feb  4 06:03:00 2006
From: jth01 at arcor.de (Jens Theisen)
Date: 04 Feb 2006 11:03:00 +0000
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<GrGdnYYzsbcBLH_eRVn-iQ@comcast.com>
	<mailman.1372.1138945618.27775.python-list@python.org>
	<1138967950.697932.213160@g49g2000cwa.googlegroups.com>
Message-ID: <9nCT9LjkciB@jens-theisen.de>

n.estner wrote:

> Yes, I 100% agree to that point!
> But the point is, the current situation is not newbie-friendly (I can
> tell, I am a newbie): I declare a method with 3 parameters but when I
> call it I only pass 2 parameters. That's confusing. If I declare a
> member variable, I write: "self.x  = ValueForX", why can't I be equally
> explicit for declaring member functions?

For someone new to OO in general it might as well be something good, so he  
realises that there actually really is a hidden parameter. After all,  
there is something to understand with "self", and this discrapency between  
the number of arguments and parameters puts newbies to it.

Jens



From gregpinero at gmail.com  Wed Feb  1 11:33:27 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Wed, 1 Feb 2006 11:33:27 -0500
Subject: urllib2 - My POST Request just isn't working right
In-Reply-To: <1138810726.547315.82890@f14g2000cwb.googlegroups.com>
References: <312cfe2b0602010753uc363a85wb3f87cf2677993a2@mail.gmail.com>
	<mailman.1317.1138810288.27775.python-list@python.org>
	<1138810726.547315.82890@f14g2000cwb.googlegroups.com>
Message-ID: <312cfe2b0602010833j29f59563i90e62145e6829d33@mail.gmail.com>

Ok, I tried the changes you guys suggested but same error still:
1. Corrected spelling of referrer.
2. Don't specify host.

Here is what they say my request should look like:
-------------------------------------------------------------------------
POST /GatewayDC HTTP/1.0
Referer: YourCompanyNameGoesHere
Host: SSLserver.fedex.com
Accept: image/gif, image/jpeg, image/pjpeg, text/plain, text/html, */*
Content-Type: image/gif Content-length: %d

Your FedEx Transaction
-------------------------------------------------------------------------
Note that Host here is ficticious.  My host should be correct.  And
they have referrer mispelled here so who knows which to use!

Here are some suspicions I have:

1 . One thing that is weird is that the data part just says "Your
FedEx Transaction".  I know I put the XML here, but I also notice that
urllib2 is putting this as:

request=<xml ....

Can I have my xml placed here without that something= part?  That
don't specify what parameter name I should use.

2. urllib2 seems to create my request with \n\r line endings.  Should
it maybe just be \n?  And if so, how to change that?

Thanks again,

Greg


From mitsura at skynet.be  Wed Feb 15 17:11:53 2006
From: mitsura at skynet.be (mitsura at skynet.be)
Date: 15 Feb 2006 14:11:53 -0800
Subject: PyXML SAX Q?
Message-ID: <1140041512.995754.269980@g47g2000cwa.googlegroups.com>

Hi,

is it possible to use SAX to parse XML that is not in a file but in a
large string?
If I open my XML file and read the content into a string variable. Is
there a way I can pass it to the PyXML Sax handler?
The reason I want to know is that I need to parse XML that is generated
by a process on a Unix system. I can connect to the process via a
socket and the the XML but I need to store the XML somewhere before I
can parse it.
I could dump it to a file first and then hand it to the parser but that
seems unefficient.

Maybe I could read the XML from the socket directly into the parser.

Any ideas are welcome

With kind regards,

Kris



From kp8 at mac.com  Thu Feb  9 22:14:22 2006
From: kp8 at mac.com (kpp9c)
Date: 9 Feb 2006 19:14:22 -0800
Subject: random playing soundfiles according to rating.
In-Reply-To: <1139532595.345369.241560@o13g2000cwo.googlegroups.com>
References: <1139456949.087347.173800@o13g2000cwo.googlegroups.com>
	<1139532595.345369.241560@o13g2000cwo.googlegroups.com>
Message-ID: <1139541262.121071.130110@g47g2000cwa.googlegroups.com>

I've been looking at some of the suggested approaches and looked a
little at Michael's bit which works well.... bisect is a module i
always struggle with (hee hee)

I am intrigued by Ben's solution and Ben's distilled my problem quite
nicely, but, well....i don't understand what "point" is doing with
wieght for key, weight for zlist, furthermore, it barfs in my
interpreter... (Python 2.3)



From steve at REMOVEMEcyber.com.au  Tue Feb 21 03:59:37 2006
From: steve at REMOVEMEcyber.com.au (Steven D'Aprano)
Date: Tue, 21 Feb 2006 19:59:37 +1100
Subject: number ranges
References: <e86a5fd00602131854s73191cbbu742d4434ad074908@mail.gmail.com>
	<1139945386.3346.38.camel@pc1.cole.uklinux.net>
	<43F8D881.5030804@sympatico.ca>
	<gfmdnZrrLeHK22TenZ2dnUVZ_tCdnZ2d@comcast.com>
	<43F97AA8.50005@REMOVEMEcyber.com.au>
	<3_WdnUP9qr9XRmTenZ2dnUVZ_sydnZ2d@comcast.com>
	<1hb1umb.wr2hsk1chby86N%aleaxit@yahoo.com>
	<NMuKf.5613$%14.252734@news20.bellglobal.com>
	<1hb2uq1.e7kdkt1z0ge4rN%aleaxit@yahoo.com>
Message-ID: <43FAD679.2040305@REMOVEMEcyber.com.au>

Alex Martelli wrote:

> Colin J. Williams <cjw at sympatico.ca> wrote:
>    ...
> 
>>>>I am also open to such arguments but it will be tough to convince me
>>>>that "x to y" should mean something different from what it means in
>>>>Pascal, BASIC, and English.
>>>
>    ...
> 
>>1. Why not treat '2 to 5' or '(2 to 5)' as a semi-open interval?
> 
> 
> Reread the part I quoted above: at least some of the proponents of this
> syntax appear to be totally ignorant of 30 years of literature and
> practice of programming, "it will be tough to convince" them that closed
> intervals are a terrible mistake and semi-open ones the only way to go.

I intellectually understand that semi-open intervals 
are the only way to go. But reading the words, the part 
of my brain that speaks English cries out for a closed 
interval. Bad brain.

Given the overwhelming benefit of semi-closed 
intervals, I wish to amend my proposal to follow Alex's 
suggestions, namely:

for i in (1 to 10 by 3):
     print i

should print 1 4 7.

That would make (a to b by c) equivalent to 
range(a,b,c) except that it returns an iterator rather 
than a list. Hmmm... putting it that way, the new 
syntax actually costs 1 keystroke, or saves 1 if you 
put spaces after the commas in the range expression. 
Does it add enough clarity and ease of understanding to 
justify two new keywords?


> Introducing a new syntax, with semantics that "don't convince" some of
> its prominent proponents, would be self-destructive (I shudder just to
> think of the amount of time and energy we'd all be spending dealing with
> whines about it); Python is clearly much better off if such people run
> away to Ruby, with its (expletive deleted) a..b AND a...b syntaxes just
> to ensure maximum confusion;-).

Ruby uses both .. and ...? Now I'm frightened.



-- 
Steven.



From bonono at gmail.com  Sun Feb 12 23:59:52 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 12 Feb 2006 20:59:52 -0800
Subject: Newbie
In-Reply-To: <HZJHf.2737$lo3.1139@trnddc07>
References: <v3JHf.2731$lo3.2501@trnddc07>
	<43ef6433$0$25387$636a55ce@news.free.fr>
	<HZJHf.2737$lo3.1139@trnddc07>
Message-ID: <1139806792.698674.168530@g44g2000cwa.googlegroups.com>


LittlePython wrote:
> I am very new to python. I have been studying it for only a month or so. I
> have been using vbscript for about 2-3 yrs and only recently been using it
> rather heavily the past 9 months or so. I am new very new to oop. My main
> use will be administrative scripting into the win3k, XP, AD domain,
> 55exchange and 2003exchange environments. I like to incorp wxpython (GUI)
> into my scripts instead of HTA's that I have been using with VBS. I am also
> finding myself being tasked with jobs that are outside the scope of VBS.
> Well that's a lot to learn and I have a feeling that to many I am just
> another member of  "The Ministry of STUPID Questions"
>
Out of curiosity, why python ? The new VB.Net seems to be a very
interesting one language wise and given that you have a VB experience,
it seems to be a natural one to try.



From chasonh at hotmail.com  Mon Feb  6 11:47:25 2006
From: chasonh at hotmail.com (Chason Hayes)
Date: Mon, 06 Feb 2006 16:47:25 GMT
Subject: Literal Escaped Octets
References: <pan.2006.02.06.04.50.15.325558@hotmail.com>
	<mailman.1495.1139233969.27775.python-list@python.org>
Message-ID: <pan.2006.02.06.16.57.13.359336@hotmail.com>

On Mon, 06 Feb 2006 13:39:17 +0000, Steve Holden wrote:

> Chason Hayes wrote:
>> I am trying to convert raw binary data to data with escaped octets in
>> order to store it in a bytea field on postgresql server. I could do this
>> easily in c/c++ but I need to do it in python. I am not sure how to read
>> and evaluate the binary value of a byte in a long string when it is a non
>> printable ascii value in python. I read some ways to use unpack from the
>> struct module, but i really couldn't understand where that would help. I
>> looked at the MIMIEncode module but I don't know how to convert the object
>> to a string. Is there a module that will convert the data? It seems to me
>> that this question must have been answered a million times before but I
>> can't find anything.
>> 
>> 
>> 
>> See http://www.postgresql.org/docs/8.1/interactive/datatype-binary.html
>> for a description of the problem domain.
>> 
>> 
> The URL you reference is discussing how you represent arbitrary values 
> in string literals. If you already have the data in a Python string the 
> best advise is to use a parameterized query - that way your Python DB 
> API module will do the escaping for you!
> 
> regards
>   Steve

Thanks for the input. I tried that with a format string and a
dictionary, but I still received a database error indicating illegal
string values. This error went away completely when I used a test file
consisting only of text, but reproduced everytime with a true binary file.
If you can let me know where I am wrong or show me a code snippet with a
sql insert that contains a variable with raw binary data that works,
I would greatly appreciate it.

Chason



From eoinrogers at gmail.com  Sun Feb 19 14:58:20 2006
From: eoinrogers at gmail.com (Byte)
Date: 19 Feb 2006 11:58:20 -0800
Subject: Another stupid newbie question
In-Reply-To: <mailman.2104.1140287332.27775.python-list@python.org>
References: <1140203709.145048.314180@g43g2000cwa.googlegroups.com>
	<mailman.2065.1140204717.27775.python-list@python.org>
	<1140205868.660418.234980@z14g2000cwz.googlegroups.com>
	<pan.2006.02.18.00.49.32.389635@REMOVETHIScyber.com.au>
	<mailman.2104.1140287332.27775.python-list@python.org>
Message-ID: <1140379100.245443.18220@f14g2000cwb.googlegroups.com>

"Do yourself a HUGE favour and read this before posting any more
questions
to comp.lang.python. Trust me, you really will thank us.

http://www.catb.org/~esr/faqs/smart-questions.html "

I find that webpage highly insulting, and so should you. It is treating
you like a small child, who needs to be told everything. If you need
more information, just ask. I myself have been on hardware lists/fourms
for quite a while now. I never answer questions that go into too much
detail, I find it off-putting and insulting - I feel it treats me like
some sort of robot, that requires all eventualities to be programed
into it to start answering the questions. I just ask politly for more
info, if I need it. But questions from people saying 'Please help' etc.
is great. They know they are in the wrong, and intend to be humorus.
They dont intend to annoy/offend anybody. And really, I dont need to be
told how to be polite, thank you. As regards to grammer/spelling, what
if sombody is unsure of how to spell something? And did you ever hear
of being in a rush?

 -- /usr/bin/byte



From rubic88 at gmail.com  Fri Feb 24 10:01:53 2006
From: rubic88 at gmail.com (Rubic)
Date: 24 Feb 2006 07:01:53 -0800
Subject: datetime iso8601 string input
References: <1140714826.044272.253460@t39g2000cwt.googlegroups.com>
	<dtmjh7$97t$1@wake.carmen.se>
	<1140786439.054438.32080@u72g2000cwu.googlegroups.com>
	<mailman.2399.1140791499.27775.python-list@python.org>
Message-ID: <1140793313.542526.124790@i40g2000cwc.googlegroups.com>

Yeah, it's a trivial function that's rewritten for each new project
that passes datetime objects as strings <0.2 wink>.  On the basis of it
being a trivial convenience, I could propose removing hundreds of
"redundant" functions from the library.  ;-)

Never mind.  I'll drop it.

Jeff Bauer
Rubicon, Inc.



From dolmens at gmail.com  Mon Feb 27 05:46:37 2006
From: dolmens at gmail.com (Dolmans Sun)
Date: Mon, 27 Feb 2006 18:46:37 +0800
Subject: sort one list using the values from another list
References: <mailman.2447.1140969980.27775.python-list@python.org>
	<4401d314_2@newspeer2.tds.net>
Message-ID: <dtula8$r30$1@news.yaako.com>

Kent Johnson wrote:

>   >>> [a for b,a in sorted(zip(B,A))]
also, [a for _,a in sorted(zip(B,A))]

didn't read refs, tested above python-2.2.3.

-- 
Sun Yi Ming

you can logout any time you like,
but you can never leave...


From richard at nospam.com  Sat Feb 25 08:24:09 2006
From: richard at nospam.com (Richard Townsend)
Date: Sat, 25 Feb 2006 13:24:09 +0000
Subject: Using ElementTree to tidy up an XML string to my liking
References: <1140716245.381730.285310@j33g2000cwa.googlegroups.com>
	<1140767274.159129.268640@i39g2000cwa.googlegroups.com>
	<1140781410.982716.316410@p10g2000cwp.googlegroups.com>
	<dtnfbp$7i8$1@wake.carmen.se>
Message-ID: <1jashon94gvt8.cvhbc7vdcpwk.dlg@40tude.net>

On Fri, 24 Feb 2006 18:21:59 +0100, Magnus Lycka wrote:

> Concerning element names, it's your coice of course, but I agree
> more and more with Guido and PEP008 that camelCase is ugly. (Not
> that ALLCAPS is better...)

I can see in PEP008 where it says Capitalized_Words_With_Underscores is
ugly, but I can't see where it says pure camelCase is ugly ?

-- 
Richard


From michael at adrhinum.de  Thu Feb  9 21:18:24 2006
From: michael at adrhinum.de (Michael Amrhein)
Date: Fri, 10 Feb 2006 03:18:24 +0100
Subject: representing physical units
In-Reply-To: <1139518037.704683.99910@z14g2000cwz.googlegroups.com>
References: <1139518037.704683.99910@z14g2000cwz.googlegroups.com>
Message-ID: <43EBF7F0.5030009@adrhinum.de>

Russ schrieb:
> I know that python packages are available for representing physical
> units, but I am getting frustrated trying to find them and determine
> which is the best.
> 
> Rather than just using conventional dimensionless numbers with implicit
> units, I would like to have a way to explicitly represent the units. If
> incompatible units are added or subtracted, I would like to have an
> error detected. Auto-conversions (e.g., from feet to miles) to enforce
> consistency before adding or subtracting are not necessary. I would
> even like to be able to multiply units. For example, I would like to
> have meters returned when I multiply meters/second by seconds.
> 
> Where can I find a good package that does this? Thanks.
> 

Look at http://sourceforge.net/projects/unum/
Enjoy
Michael


From erniedude at gmail.com  Mon Feb  6 11:02:04 2006
From: erniedude at gmail.com (Ernesto)
Date: 6 Feb 2006 08:02:04 -0800
Subject: read file problem
Message-ID: <1139239797.811569.253010@g43g2000cwa.googlegroups.com>

I'm just want to read in the contents of a (text) file.  The text file
is filled with semiColon delimited floating point strings...

0.456;1.265;99.742;...

For some reason, I can't get the contents back when I call file.read()
 Here's my code.

filePath = "C:\\folder\\myFile.txt
fileHandle = open(filePath, 'r').read();
print fileHandle.read()

# This prints nothing when it should print the above values....  Thanks
for the help



From martin.witte at gmail.com  Fri Feb 17 03:52:40 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 17 Feb 2006 00:52:40 -0800
Subject: days since epoch
In-Reply-To: <1havgu7.1ph0i3k1lpl56cN%aleaxit@yahoo.com>
References: <1140154082.952039.283420@g43g2000cwa.googlegroups.com>
	<1havgu7.1ph0i3k1lpl56cN%aleaxit@yahoo.com>
Message-ID: <1140166360.546074.280990@z14g2000cwz.googlegroups.com>

As suggested by Alex the datetime module makes this easy:

py> import datetime
py> epoch = datetime.datetime.utcfromtimestamp(0)
py> print epoch
1970-01-01 00:00:00
py> today = datetime.datetime.today()
py> d = today - epoch
py> print d
13196 days, 9:50:44.266200
py> print d.days # timedelta object
13196



From claird at lairds.us  Fri Feb 17 17:08:03 2006
From: claird at lairds.us (Cameron Laird)
Date: Fri, 17 Feb 2006 22:08:03 GMT
Subject: embedding python in HTML
References: <GD5Jf.1637$No6.38292@news.tufts.edu>
	<8n6Jf.1640$No6.38203@news.tufts.edu>
	<43f4f98e$0$16930$636a55ce@news.free.fr>
	<bpCdne1jK5jC1GjeRVn-gw@rcn.net>
Message-ID: <k9rhc3-7ms.ln1@lairds.us>

In article <bpCdne1jK5jC1GjeRVn-gw at rcn.net>,
John Salerno  <johnjsal at NOSPAMgmail.com> wrote:
>bruno at modulix wrote:
>
>> You've got to understand that Python is *not* a 'ServerPage' language
>> (-> php, asp, jsp etc) in itself. Your server can now run python, fine,
>> but *how* ? CGI ? FastCGI ? mod_python ? other ? (hint: it's probably
>> just plain old CGI...)
>
>So does that mean I need to have something further on the server? Or is 
>this something I can do on my end? How do I find out what I need?

While others have provided salient technical details to
you, my recommendation is to start with your provider.
Say to him, "when you tell me you've 'turned Python on',
what exactly does that mean?  Have you configured Web
service for CGI?  Zope?  ..."  This is a case where it's
good to talk to a person.


From donn at drizzle.com  Mon Feb 20 12:05:59 2006
From: donn at drizzle.com (Donn Cave)
Date: Mon, 20 Feb 2006 17:05:59 -0000
Subject: why does close() fail miserably on popen with exit code -1 ?!
References: None <1140416836.030294.289800@f14g2000cwb.googlegroups.com>
Message-ID: <1140455158.381497@jetspin.drizzle.com>

Quoth "Atanas Banov" <enterr at gmail.com>:
| i ran onto this weirdness today: seems like close() on popen-ed
| (pseudo)file fails miserably with exception instead of returning exit
| code, when said exit code is -1.
|
| here is the simplest example (under Windows):
|
| >>> print popen('exit 1').close()
| 1
| >>> print popen('exit -1').close()
| Traceback (most recent call last):
|   File "<interactive input>", line 1, in ?
| IOError: (0, 'Error')
| >>> print popen('exit -2').close()
| -2
|
| has anyone have idea why is that?

I have no idea about Microsoft Windows, and I doubt that you could
reproduce this on UNIX, but neither does this look like a valid
UNIX program.  Exit codes are integer values in the range [0..255],
so there are no negative numbers (which is what I think you intended),
nor are there strings (which is what '-1' would have been with the
classic UNIX shell.)

So I will leave it to someone else to wrestle with the Microsoft
problem, but I just wanted to point out that it isn't something you
could expect to work anywhere else.

	Donn Cave, donn at drizzle.com


From mackstevenson at hotmail.com  Tue Feb  7 09:13:07 2006
From: mackstevenson at hotmail.com (MackS)
Date: 7 Feb 2006 06:13:07 -0800
Subject: how to kill a python process?
In-Reply-To: <slrndufjb0.2t1.grahn+nntp@frailea.sa.invalid>
References: <1139159404.912421.251960@g43g2000cwa.googlegroups.com>
	<slrnduceiv.2t1.grahn+nntp@frailea.sa.invalid>
	<1139170910.513664.169900@o13g2000cwo.googlegroups.com>
	<slrndufjb0.2t1.grahn+nntp@frailea.sa.invalid>
Message-ID: <1139321587.721141.320930@f14g2000cwb.googlegroups.com>

Hi Jorgen

THanks for your help. I began writing a wrapper around python did (as
Donn suggested), but then noticed that this was due to not having
educated myself on the options you can pass to ps, pidof and top:

running pidof -x and using the 'c' command in top work pretty nicely.
That way I no longer see 23 'pythons' in the system : ) and know which
one to stop.

Mack



From fabioz at esss.com.br  Mon Feb  6 09:43:15 2006
From: fabioz at esss.com.br (Fabio Zadrozny)
Date: Mon, 06 Feb 2006 12:43:15 -0200
Subject: fairly large webapp: from Java to Python. experiences?
In-Reply-To: <43e74776$1_2@newspeer2.tds.net>
References: <1139005746.363918.267370@g47g2000cwa.googlegroups.com>	<1139018653.508049.182020@g43g2000cwa.googlegroups.com>	<prVEf.7358$MF1.4951@fe08.lga>	<j88Ff.160530$65.4490774@twister1.libero.it>	<mailman.1484.1139227848.27775.python-list@python.org>
	<43e74776$1_2@newspeer2.tds.net>
Message-ID: <43E76083.5010009@esss.com.br>

Kent Johnson wrote:

>Fabio Zadrozny wrote:
>  
>
>>I agree that python code is usually smaller... but what you did is too 
>>unfair (the code below would be more suitable for the comparrison).
>>
>>python:
>>print "%10.2f" % 10
>>
>>java:
>>System.out.println(String.format("%10.2f", 10.0));
>>    
>>
>
>Though String.format() is new in Java 1.5 so in older code or for 
>backward compatibility the longer code may be found. OTOH Python has 
>supported % formatting since at least version 1.4 released in 1996.
>http://www.python.org/doc/1.4/lib/node11.html#SECTION00315100000000000000
>
>In my experience the original point is valid - Python is usually 
>(always?) more concise than equivalent Java code, and often dramatically 
>so. Python makes common operations easy; Java sometimes seems to go out 
>of its way to make them awkward.
>
>Kent
>  
>

Yeap, I agree with the original point too (as I explained in the rest of 
my comment)... just didn't think it was a 'fair' comparisson. ;-)
-- me? When I use java I write 1.5 code and 'retroweave' it to be 
compatible with java 1.4 (Pydev is done this way) -- and I use Python at 
work -- and I'm very happy with it... I just think that a language is as 
a tool, and each may be suited better for a different occasion.

The 'usually smaller' I mentioned is because sometimes java code gets 
smaller because of the already-existing codebase... E.g.: for developing 
an IDE, Eclipse already has a huge codebase, so, if I wanted to do all 
that was already done in it in python just because Eclipse was in java, 
I think I would be doing the wrong decision, and besides, I could use 
jython for it if I wanted to...

And from what I understood, the original poster had a large codebase in 
java already, so, I'm not sure that changing  everything to python would 
be the way to go (altough that DOES depend a lot on the original 
codebase quality).

Cheers,

Fabio

-- 
Fabio Zadrozny
------------------------------------------------------
Software Developer

ESSS - Engineering Simulation and Scientific Software
www.esss.com.br

PyDev - Python Development Enviroment for Eclipse
http://pydev.sf.net
http://pydev.blogspot.com




From paul at boddie.org.uk  Tue Feb 21 03:33:05 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 21 Feb 2006 00:33:05 -0800
Subject: Python vs. Lisp -- please explain
References: <mailman.2202.1140493436.27775.python-list@python.org>
Message-ID: <1140510785.531218.93640@g44g2000cwa.googlegroups.com>

Delaney, Timothy (Tim) wrote:
> Donn Cave wrote:
>
> > for very long.  If you give me a Python program, you have 3 choices:
> > cross your fingers and hope that I have the required Python
> > interpreter version, slip in a 25Mb Python interpreter install and
> > hope I won't notice, or come clean and tell me that your program
> > needs an interpreter and I should check to see that I have it.
>
> Or use the correct term - a Python Virtual Machine.

Well, yes, I suppose you could have something just interpreting
bytecodes and with no support for parsing and compiling Python the
language - I suppose PyMite [1, 2] and other similar works are like
that.

> The the compiler is built into the VM as opposed to a separate tool
> (like Java) is just an implementation issue. There's nothing stopping
> you from compiling Python source offline and just distributing the
> bytecode (and this is commonly done) - although in that case you are
> usually tied to a specific PVM major version.

Yes, but you can run something like gcj on Java programs and get an
executable which, if I'm not mistaken, doesn't contain any Java VM
whatsoever. There are packagers and other tools for Python which
produce executables, but most of them bundle some kind of bytecode
interpreter, with the possible exception of things like "Python to C"
and, if you're not actually writing Python, Pyrex. However, I believe
that jythonc also produces Java class files with no dependencies on an
embedded VM.

Paul

[1] http://www.python.org/pycon/papers/pymite/
[2] http://wiki.python.org/moin/PyMite



From Nainto at gmail.com  Thu Feb 23 17:28:41 2006
From: Nainto at gmail.com (Nainto)
Date: 23 Feb 2006 14:28:41 -0800
Subject: Using a list of RGB data for Canvas widget? [(R1, G1, B1), (R2, G2,
	B2) etc.]
References: <1140655450.201394.25840@g47g2000cwa.googlegroups.com>
Message-ID: <1140733721.904124.175800@i40g2000cwc.googlegroups.com>

Just to clarify. I'm not asking for any code. A ink or explination of
how to convert a list of this type to BitmapImage or PhotoImage data
would be very helpful.



From oldduck at thelake.com  Sun Feb 19 17:23:38 2006
From: oldduck at thelake.com (Old Duck)
Date: Sun, 19 Feb 2006 17:23:38 -0500
Subject: editor for Python on Linux
References: <dtai6e$23m$2@ariane.blic.net>
Message-ID: <ee741$43f8f002$4059f547$6756@pioneerwireless.net>

Mladen Adamovic wrote:

> Hi!
> 
> I wonder which editor or IDE you can recommend me for writing Python
> programs. I tried with jEdit but it isn't perfect.


My personal favorite is Kate (comes with KDE).

- Duck


From jkn_gg at nicorp.f9.co.uk  Wed Feb 22 03:50:34 2006
From: jkn_gg at nicorp.f9.co.uk (jkn)
Date: 22 Feb 2006 00:50:34 -0800
Subject: new wooden door step - fixing and finishing
Message-ID: <1140598234.454510.281820@g14g2000cwa.googlegroups.com>

Hi all
    I'm considering having a go at replacing the wooden door step to
our back door. The original is loose and rotting.

I'm sure some of this will be clearer when I remove the (metal) door
frame - how is such a step fixed? Vertical frame fixings?

Also, any suggestions for treating/finishing such an item, subject to
heavy use, to prevent future rot? I was wondering about treating it
wilth liberal amounts of Teak Oil or similar...

    Thanks
    Jon N



From marcus.tettmar at gmail.com  Fri Feb  3 05:29:03 2006
From: marcus.tettmar at gmail.com (marcus.tettmar at gmail.com)
Date: 3 Feb 2006 02:29:03 -0800
Subject: newbie - script works in PythonWin - fails from Python
In-Reply-To: <1138961665.684357.78060@g44g2000cwa.googlegroups.com>
References: <1138960717.927268.22640@g44g2000cwa.googlegroups.com>
	<1138961665.684357.78060@g44g2000cwa.googlegroups.com>
Message-ID: <1138962543.290178.77790@g47g2000cwa.googlegroups.com>

I'm using ctypes and loading a DLL and running a DLL function.  As I
say it works perfectly with no errors when I run from PythonWin but
gives the following exception when run from command line.

WindowsError: exception code 0xeedfade

I can use the DLL with no issues in other languages too.  It works fine
in VB, C++ and in Python when run from PythonWin but gets an exception
when run from python.exe

PythonWin must be doing something different, but I can't find anything
in the documentation.



From fakeaddress at nowhere.org  Fri Feb 10 06:05:56 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Fri, 10 Feb 2006 11:05:56 GMT
Subject: Question about idioms for clearing a list
In-Reply-To: <1139561603.918405.167120@g47g2000cwa.googlegroups.com>
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au>
	<ds83kd$98m$1@sea.gmane.org>
	<mailman.1510.1139250471.27775.python-list@python.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>
	<mailman.1546.1139320907.27775.python-list@python.org>
	<dscdtr$ciu$1@wake.carmen.se>
	<mailman.1594.1139403378.27775.python-list@python.org>
	<dsd311$qlp$1@wake.carmen.se>
	<ZatGf.28418$F_3.14242@newssvr29.news.prodigy.net>
	<dsfej3$1i6$1@wake.carmen.se>
	<cQRGf.54501$PL5.14689@newssvr11.news.prodigy.com>
	<1haij56.14jpj06cl31lkN%aleaxit@yahoo.com>
	<1139561603.918405.167120@g47g2000cwa.googlegroups.com>
Message-ID: <os_Gf.54587$PL5.84@newssvr11.news.prodigy.com>

Raymond Hettinger wrote:
[...]
> If you're asking why list's don't have a clear() method, the answer is
> that they already had two ways to do it (slice assignment and slice
> deletion) and Guido must have valued API compactness over collection
> polymorphism.

That's a decision from long ago. Now that we have sets and
the iterable protocol, the case is quite different.


-- 
--Bryan


From aleaxit at yahoo.com  Sun Feb 26 16:36:02 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 26 Feb 2006 13:36:02 -0800
Subject: Is Python a Zen language?
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
	<1140931766.200951.321320@t39g2000cwt.googlegroups.com>
	<1140963005.123017.90890@t39g2000cwt.googlegroups.com>
	<1140986927.452802.241330@e56g2000cwe.googlegroups.com>
Message-ID: <1hbdcdc.1hnd616k1t3nsN%aleaxit@yahoo.com>

Crutcher <crutcher at gmail.com> wrote:
   ...
> No, I don't disagree that people do this. The history of "Zen and the
> Art of X" dates from "Zen and the Art of Motorcycle Repair", which is

That's Maintenance, not Repair.  Subtle but important distinction.


Alex


From steve at REMOVETHIScyber.com.au  Fri Feb 24 11:07:59 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sat, 25 Feb 2006 03:07:59 +1100
Subject: make a class instance from a string ?
References: <mailman.1955.1140018042.27775.python-announce-list@python.org>
	<mailman.2340.1140687820.27775.python-list@python.org>
	<1140791847.321823.21630@i40g2000cwc.googlegroups.com>
Message-ID: <pan.2006.02.24.16.07.58.363075@REMOVETHIScyber.com.au>

On Fri, 24 Feb 2006 06:37:27 -0800, Mike Woodhouse wrote:

> Is there anything particularly bad with
> 
> obj = eval(classname + "()")
> 
> ?
> 
> It appears to work, but I'm a noobie so I could be missing something
> nasty, in which any edication would be gratefully received.

In your own code, that you control? Nothing particularly bad.

In your public web application, using classname supplied by some anonymous
remote user? It could be bad:

obj = eval("(lambda : os.system('ls'))" + "()")

only, instead of 'ls', imagine a more... serious shell command.

Using eval is like running a small piece of Python code. If you control
the code (or to be precise, the expression) then it is no more dangerous
than any other code you choose to run.

On the other hand, if you give access to your system to anonymous users,
you have to assume some of them will be malicious, and they will be a lot
more inventive searching for security holes than you.


-- 
Steven.



From fakeaddress at nowhere.org  Tue Feb  7 17:26:42 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Tue, 07 Feb 2006 22:26:42 GMT
Subject: Question about idioms for clearing a list
In-Reply-To: <mailman.1567.1139348019.27775.python-list@python.org>
References: <mailman.1294.1138727665.27775.python-list@python.org>	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>	<mailman.1489.1139232969.27775.python-list@python.org><pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au>	<ds83kd$98m$1@sea.gmane.org><mailman.1510.1139250471.27775.python-list@python.org>	<43E7F59B.9070009@REMOVEMEcyber.com.au><mailman.1537.1139297533.27775.python-list@python.org>	<E78Gf.22893$Jd.14515@newssvr25.news.prodigy.net>
	<mailman.1567.1139348019.27775.python-list@python.org>
Message-ID: <C89Gf.22902$Jd.698@newssvr25.news.prodigy.net>

Fredrik Lundh wrote:
> Bryan Olson wrote:
> 
> 
>>So is consistency; it ain't Perl, thank Guido.
> 
> consistency is the hobgoblin of little minds.

Look up that saying. Any clues?


>>Python now has, what, three built-in mutable collections types:
>>lists, dictionaries, and sets. Dicts and sets both have a clear()
>>method and lists do not.
> 
> dicts and sets are mappings, and lists are not.

Sets are mappings?  Look up the terms, or check the library doc:

     http://docs.python.org/lib/lib.html


 > mappings don't
 > support slicing.  lists do.

Do they all have an empty state? Can you figure out what a clear()
method for lists should do, just from what it does for sets and
dicts?

> are you sure you know Python ?

Why would you post a messages like that?


-- 
--Bryan


From durumdara at gmail.com  Tue Feb 21 05:17:01 2006
From: durumdara at gmail.com (Durumdara)
Date: Tue, 21 Feb 2006 11:17:01 +0100
Subject: Little tool - but very big size... :-(
In-Reply-To: <dteo9g$3vp$1@news.lysator.liu.se>
References: <mailman.2211.1140513270.27775.python-list@python.org>
	<dteo9g$3vp$1@news.lysator.liu.se>
Message-ID: <43FAE89D.10505@gmail.com>

Hi !

>I've snipped out the relatively small files above. Yes, true, some of 
>them consume about 0.5MB each.
>
>It seems to me that your choice of GUI framework is a major cost here. I 
>have never used wxpython. Instead my GUIs are based on tkinter. What I 
>typically end up with is roughly 7MB. My last example ended up in 7.5MB. 
>Zipping the whole thing reduces that to 2.6MB. Is it completly out of 
>the question to have a compressed version of the tool on your memory 
>stick, and to decompress it on the examined computer before actually 
>running the tool?
>
>/MiO
>  
>
Yes, the wxPython use the big files, and win32api do it too...
I need them, but wxPython is changeable to tkinter, because it is use 
only one special thing: a wx.GenericDirCtrl (the user can choose file or 
directory with this control in same way).

The last (compressed) version is 5 MB. That is better !

Thanx: dd





From jslowery at gmail.com  Mon Feb 20 10:51:56 2006
From: jslowery at gmail.com (jslowery at gmail.com)
Date: 20 Feb 2006 07:51:56 -0800
Subject: Modifying an instances dict to change attribute lookup
Message-ID: <1140450716.131017.165860@f14g2000cwb.googlegroups.com>

Hmm, I know this is something fundamental about how Python implements
predicate dispatch, but for some reason I believed that this would
work:

class delegate_dict(dict):
    def __init__(self, orig, deleg):
        dict.__init__(self, orig)
        self.deleg = deleg

    def __getitem__(self, name):
        print 'here:', name
        try:
            v = dict.__getitem__(self, name)
        except KeyError:
            return self.deleg.__getitem__(name)
        return v

def delegate(target, source):
    target.__dict__ = delegate_dict(target.__dict__, source.__dict__)

As a simple usage, give:


class A(object):
    pass

class B(object):
    def __init__(self, o):
        delegate(self, o)

a = A()
a.test = 1
b = B(a)
print b.__dict__.__getitem__('test')

# This goes down in flames
print b.test


And then a dumb example showing the concept I assumed was a given:

class C(object):
    pass

c = C()
c.x = 1
assert c.__dict__.__getitem__('x') == c.x

Could someone please tell me why the first example using a customized
dict does not perform as advertised?



From lycka at carmen.se  Thu Feb 23 04:59:08 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 23 Feb 2006 10:59:08 +0100
Subject: a little more help with python server-side scripting
In-Reply-To: <polqv1t6kvnffpjv0n0o69lfopmbupcjep@4ax.com>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>	<Lc0Lf.1652$No6.38850@news.tufts.edu>
	<mailman.2309.1140639119.27775.python-list@python.org>
	<_14Lf.1655$No6.38835@news.tufts.edu>
	<polqv1t6kvnffpjv0n0o69lfopmbupcjep@4ax.com>
Message-ID: <dtk11e$ejj$1@wake.carmen.se>

Dennis Lee Bieber wrote:
> On Wed, 22 Feb 2006 20:43:38 GMT, John Salerno
> <johnjsal at NOSPAMgmail.com> declaimed the following in comp.lang.python:
> 
> 
>>Does that answer the question about active scripting language?
> 
> 
> 	Slipping in... It sure sounds to me like they have Python as a pure
> CGI language.
> 
> That is:
> 	You must reference the script with a URL having .../script.py (and
> arguments will possibly be sent appended to this, but should have been
> parsed out and become part of the standard CGI environment).

If you want existing links to continue to work, you can simply
place HTML redirects in the current HTML files, so that they
invoke the proper Python CGI script, i.e. somepage.html should
contain a redirect to /my_cgi.py?page=somepage

I've roughly described in a previous posting how my_cgi.py should
work. Just let it suck in the file with the 'somepage' content,
and add the header and footer stuff.

You'll find Python CGI tutorials on the net, and the library
reference chapters on cgi and cgitb will also help. Start by
enabling cgitb...



From onurb at xiludom.gro  Fri Feb 10 02:53:27 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Fri, 10 Feb 2006 08:53:27 +0100
Subject: read-only attributes
In-Reply-To: <mailman.1697.1139538188.27775.python-list@python.org>
References: <20060210013513.8225.qmail@web36712.mail.mud.yahoo.com>
	<mailman.1697.1139538188.27775.python-list@python.org>
Message-ID: <43ec4692$0$1712$636a55ce@news.free.fr>

limodou wrote:
> On 2/10/06, john peter <neuzhoundxx at yahoo.com> wrote:
(snip)

>> what do i have to do if i want my application code to have
>>read-only
>> attributes?
>>
> I think you may consider property() built-in function:
> 
> property( [fget[, fset[, fdel[, doc]]]])
> 
> Return a property attribute for new-style classes (classes that derive
> from object).
> fget is a function

s/function/callable/

> for getting an attribute value, likewise fset is a
> function for setting, and fdel a function for del'ing, an attribute.
> Typical use is to define a managed attribute x:
> 
> 
> class C(object):
>     def __init__(self): self.__x = None
>     def getx(self): return self.__x
>     def setx(self, value): self.__x = value
>     def delx(self): del self.__x
>     x = property(getx, setx, delx, "I'm the 'x' property.")

Note that you don't need to define all three accessors. For a
'read-only' attribute, just define the getter:

class ReadOnly(object):
   def __init__(self, x):
      self._x = x
   x = property(fget=lambda self: self._x)

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From hancock at anansispaceworks.com  Fri Feb  3 15:15:12 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Fri, 3 Feb 2006 14:15:12 -0600
Subject: How do I dynamically create functions without lambda?
In-Reply-To: <drv4sd$lhb$1@sea.gmane.org>
References: <1138389517.896043.7450@g47g2000cwa.googlegroups.com>
	<pan.2006.01.28.00.35.06.174939@REMOVETHIScyber.com.au>
	<1138436008.628882.126510@g44g2000cwa.googlegroups.com>
	<pan.2006.01.28.12.02.34.293286@REMOVETHIScyber.com.au>
	<drr978$oat$1@xenon.Stanford.EDU>
	<1ha3g79.1gcm6x1yziggyN%aleaxit@yahoo.com>
	<mailman.1358.1138907003.27775.python-list@python.org>
	<1ha5e9r.gs34le12dm1luN%aleaxit@yahoo.com>
	<20060203014442.21daa210@samwise.anansi>
	<drv4sd$lhb$1@sea.gmane.org>
Message-ID: <20060203141512.15893892@samwise.anansi>

On Fri, 3 Feb 2006 09:39:39 +0100
"Fredrik Lundh" <fredrik at pythonware.com> wrote:
> Terry Hancock wrote:
> > Frankly this paper sounds like a bid for the "Journal of
> > Irreproducible Results" that somehow got accidentally
> > submitted to a serious journal
>     http://www.improbable.com/ig/ig-pastwinners.html#ig2000
> </F>

Wow. It's a relief to know I'm not the only one who regards
this paper as a joke. :-)

Cheers,
Terry

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From s323 at mail.ru  Wed Feb 15 11:52:42 2006
From: s323 at mail.ru (Sergey)
Date: Wed, 15 Feb 2006 19:52:42 +0300
Subject: file names longer than MAX_PATH under Windows 2003
References: <mailman.1900.1139925147.27775.python-list@python.org>
	<dsvi28$8u1$1@news.rtcomm.ru>
	<dsvims$gps$1@newsreader3.netcologne.de>
Message-ID: <dsvm8q$bnk$1@news.rtcomm.ru>


"Claudio Grondi" <claudio.grondi at freenet.de> wrote in message news:dsvims$gps$1 at newsreader3.netcologne.de...
> Sergey wrote:
> I don't know if and how it apply and can be of any help here, but in my C programs in the very past after switching from DOS to 
> Windows long names a following trick solved often my problems with too long names:
>   step 1:  setting the current directory to the beginning part of the name with a length which can be passed as a function 
> parameter
>   step 2:  usage of the remaining part of name as name passed as parameter to the file accessing function (relative to current 
> directory)

It seems this method doesn't help here.




From bsouthey at gmail.com  Tue Feb 21 10:15:14 2006
From: bsouthey at gmail.com (Bruce Southey)
Date: Tue, 21 Feb 2006 09:15:14 -0600
Subject: [Numpy-discussion] algorithm, optimization, or other problem?
In-Reply-To: <43FB0661.1040202@bryant.edu>
References: <43FB0661.1040202@bryant.edu>
Message-ID: <bbcd77d00602210715t3988e117ubff1540e7484f651@mail.gmail.com>

Hi,
In the current version, note that Y is scalar so replace the squaring
(Y**2) with Y*Y as you do in the dohebb function.  On my system
without blas etc removing the squaring removes a few seconds (16.28 to
12.4). It did not seem to help factorizing Y.

Also, eta and tau are constants so define them only once as scalars
outside the loops and do the division outside the loop. It only saves
about 0.2 seconds but these add up.

The inner loop probably can be vectorized because it is just vector
operations on a matrix. You are just computing over the ith dimension
of X.  I think that you could be able to find the matrix version on
the net.

Regards
Bruce



On 2/21/06, Brian Blais <bblais at bryant.edu> wrote:
> Hello,
>
> I am trying to translate some Matlab/mex code to Python, for doing neural
> simulations.  This application is definitely computing-time limited, and I need to
> optimize at least one inner loop of the code, or perhaps even rethink the algorithm.
>    The procedure is very simple, after initializing any variables:
>
> 1) select a random input vector, which I will call "x".  right now I have it as an
> array, and I choose columns from that array randomly.  in other cases, I may need to
> take an image, select a patch, and then make that a column vector.
>
> 2) calculate an output value, which is the dot product of the "x" and a weight
> vector, "w", so
>
>         y=dot(x,w)
>
> 3) modify the weight vector based on a matrix equation, like:
>
>         w=w+ eta * (y*x - y**2*w)
>                ^
>                |
>                +---- learning rate constant
>
> 4) repeat steps 1-3 many times
>
> I've organized it like:
>
> for e in 100:   # outer loop
>      for i in 1000:  # inner loop
>          (steps 1-3)
>
>      display things.
>
> so that the bulk of the computation is in the inner loop, and is amenable to
> converting to a faster language.  This is my issue:
>
> straight python, in the example posted below for 250000 inner-loop steps, takes 20
> seconds for each outer-loop step.  I tried Pyrex, which should work very fast on such
> a problem, takes about 8.5 seconds per outer-loop step.  The same code as a C-mex
> file in matlab takes 1.5 seconds per outer-loop step.
>
> Given the huge difference between the Pyrex and the Mex, I feel that there is
> something I am doing wrong, because the C-code for both should run comparably.
> Perhaps the approach is wrong?  I'm willing to take any suggestions!  I don't mind
> coding some in C, but the Python API seemed a bit challenging to me.
>
> One note: I am using the Numeric package, not numpy, only because I want to be able
> to use the Enthought version for Windows.  I develop on Linux, and haven't had a
> chance to see if I can compile numpy using the Enthought Python for Windows.
>
> If there is anything else anyone needs to know, I'll post it.  I put the main script,
> and a dohebb.pyx code below.
>
>
>                         thanks!
>
>                                         Brian Blais
>
> --
> -----------------
>
>              bblais at bryant.edu
>              http://web.bryant.edu/~bblais
>
>
>
>
> # Main script:
>
> from dohebb import *
> import pylab as p
> from Numeric import *
> from RandomArray import *
> import time
>
> x=random((100,1000))    # 1000 input vectors
>
> numpats=x.shape[0]
> w=random((numpats,1));
>
> th=random((1,1))
>
> params={}
> params['eta']=0.001;
> params['tau']=100.0;
> old_mx=0;
> for e in range(100):
>
>      rnd=randint(0,numpats,250000)
>      t1=time.time()
>      if 0:  # straight python
>          for i in range(len(rnd)):
>              pat=rnd[i]
>              xx=reshape(x[:,pat],(1,-1))
>              y=matrixmultiply(xx,w)
>              w=w+params['eta']*(y*transpose(xx)-y**2*w);
>              th=th+(1.0/params['tau'])*(y**2-th);
>      else: # pyrex
>          dohebb(params,w,th,x,rnd)
>      print time.time()-t1
>
>
> p.plot(w,'o-')
> p.xlabel('weights')
> p.show()
>
>
> #=============================================
>
> #         dohebb.pyx
>
> cdef extern from "Numeric/arrayobject.h":
>
>    struct PyArray_Descr:
>      int type_num, elsize
>      char type
>
>    ctypedef class Numeric.ArrayType [object PyArrayObject]:
>      cdef char *data
>      cdef int nd
>      cdef int *dimensions, *strides
>      cdef object base
>      cdef PyArray_Descr *descr
>      cdef int flags
>
>
> def dohebb(params,ArrayType w,ArrayType th,ArrayType X,ArrayType rnd):
>
>
>      cdef int num_iterations
>      cdef int num_inputs
>      cdef int offset
>      cdef double *wp,*xp,*thp
>      cdef int *rndp
>      cdef double eta,tau
>
>      eta=params['eta']  # learning rate
>      tau=params['tau']  # used for variance estimate
>
>      cdef double y
>      num_iterations=rnd.dimensions[0]
>      num_inputs=w.dimensions[0]
>
>      # get the pointers
>      wp=<double *>w.data
>      xp=<double *>X.data
>      rndp=<int *>rnd.data
>      thp=<double *>th.data
>
>      for it from 0 <= it < num_iterations:
>
>          offset=rndp[it]*num_inputs
>
>          # calculate the output
>          y=0.0
>          for i from 0 <= i < num_inputs:
>              y=y+wp[i]*xp[i+offset]
>
>          # change in the weights
>          for i from 0 <= i < num_inputs:
>              wp[i]=wp[i]+eta*(y*xp[i+offset] - y*y*wp[i])
>
>          # estimate the variance
>          thp[0]=thp[0]+(1.0/tau)*(y**2-thp[0])
>
>
>
>
>
>
>
> -------------------------------------------------------
> This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
> for problems?  Stop!  Download the new AJAX search engine that makes
> searching your log files as easy as surfing the  web.  DOWNLOAD SPLUNK!
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=103432&bid=230486&dat=121642
> _______________________________________________
> Numpy-discussion mailing list
> Numpy-discussion at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/numpy-discussion
>


From kzuberi at gmail.com  Tue Feb  7 10:58:26 2006
From: kzuberi at gmail.com (Khalid Zuberi)
Date: Tue, 7 Feb 2006 15:58:26 +0000 (UTC)
Subject: jython problem importing a py file
References: <1139297376.961785.146760@g43g2000cwa.googlegroups.com>
Message-ID: <loom.20060207T165357-100@post.gmane.org>

 <didier.prophete> writes:

> 
> I tried everything I could think of (playing with the __init__.py, the
> PYTHONCLASS, the CLASSPATH), but nothing seems to work...
> 
> I am doing something wrong here ? 
> 
> -Didier
> 

Take a look at the jython registry setting python.path:

  http://www.jython.org/docs/registry.html

So if you invoke jython with say:

  jython -Dpython.path=$TOP

your import should work.

- kz



From michaeltaft at gmail.com  Sat Feb 11 15:04:22 2006
From: michaeltaft at gmail.com (mwt)
Date: 11 Feb 2006 12:04:22 -0800
Subject: Clearing the screen
Message-ID: <1139688262.046667.296940@g14g2000cwa.googlegroups.com>

I'm doing some python programming for a linux terminal (just learning).
When I want to completely redraw the screen, I've been using
os.system("clear")
This command works when using python in terminal mode, and in IDLE.
However, when running a little .py file containing that command, the
screen doesn't clear. 

What to do?



From steve at holdenweb.com  Tue Feb 14 14:55:36 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 14 Feb 2006 14:55:36 -0500
Subject: Xah's Edu Corner: accountability & lying thru the teeth
In-Reply-To: <1139909629.798938.284160@g47g2000cwa.googlegroups.com>
References: <1133844932.007824.26780@g43g2000cwa.googlegroups.com>	<1134780763.066592.45390@g49g2000cwa.googlegroups.com>	<1135405908.381150.133190@o13g2000cwo.googlegroups.com>	<1136236586.734775.212440@f14g2000cwb.googlegroups.com>	<1137784561.589887.58380@o13g2000cwo.googlegroups.com>
	<1139909629.798938.284160@g47g2000cwa.googlegroups.com>
Message-ID: <dstcjk$v4b$1@sea.gmane.org>

Xah Lee wrote:
> here's a site: http://www.longbets.org/bets that takes socially
> important predictions. I might have to enter one or two.
> 
I predict Xah Lee will remain as clueless as he currently is.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From bblais at bryant.edu  Sat Feb  4 06:48:11 2006
From: bblais at bryant.edu (Brian Blais)
Date: Sat, 04 Feb 2006 06:48:11 -0500
Subject: numeric expression from string?
Message-ID: <43E4947B.2090204@bryant.edu>

Hello,

I have a string input from the user, and want to parse it to a number, and would like 
to know how to do it.  I would like to be able to accept arithmetic operations, like:

'5+5'
'(4+3)*2'
'5e3/10**3'

I thought of using eval, which will work, but could lead to bad security problems 
(not that it's a big  deal in my app, but still...)

string.atof won't do the job.  Is there a preferred way of doing this?


		thanks,


			Brian Blais


-- 
-----------------

             bblais at bryant.edu
             http://web.bryant.edu/~bblais


From lycka at carmen.se  Fri Feb 24 03:56:58 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 24 Feb 2006 09:56:58 +0100
Subject: a little more help with python server-side scripting
In-Reply-To: <dSoLf.1663$No6.38996@news.tufts.edu>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<dSoLf.1663$No6.38996@news.tufts.edu>
Message-ID: <dtmhot$4t4$1@wake.carmen.se>

John Salerno wrote:
  > Ok, seems like the verdict is that the server doesn't have mod_python
> nor does it detect the .psp extension. It can, however, detect the .py 
> extension. But does this mean I can simply include Python code in my 
> HTML files, and then give my HTML files a .py extension? I don't know 
> how to test this because I don't know how to write inline code yet. Is 
> it something like:

No, you can't do that. From your descriptions, it seems that Python
is set up as a CGI language, just as one would use Perl etc. This
means that if you have an URL ending with x.py, the web server will
do these things when you request this URL from the server:

1. Set up a number of environment variables which are useful for the
    python script it will call. Very important if the URL was invoked
    from an HTML form, which I don't suspect will happen on your site.
2. Invoke Python with your script. Basically it should call
    python.exe -u x.py
3. Read the data that x.py sends to stdout, e.g. print statements
    etc. Provided that this output looks ok, it will send it to the
    browser, otherwise it will typically send ERROR 500 (internal
    server error) instead.

You were given a CGI script already that printed out environment
variables. I got the impression that you tried that out. If you
set the environment variables shown by that CGI script using the
SET command at a Windows command prompt, and then execute your
python script at that command prompt, it has to print something like

----
Content-type: text/html

<html>
blah blah whatever
</html>
----

There is no magic beyond this. Try renaming an HTML file to .py
and invoke Python with that. It will just say SyntaxError! The
change isn't big though! You just need to make the HTML content
into a big string (surround it with """) and print the content-type
line, an empty line and this big string, and you have a start.

You have already been provided with all the information you need.
I think you need to look closely at the information Paul and several
others have given you instead of just asking more questions, and
really start using it. You won't get anywhere otherwise.

The other option is ASP. You have been given information about
that already. Be aware that ASP does not imply VBScript. You can
use Python in ASP as long as that's enabled. It seems to be exactly
what you are asking for, so I don't understand why you seem to reject
it. Don't you like the file name endings?


From rtilley at vt.edu  Wed Feb 15 14:24:30 2006
From: rtilley at vt.edu (rtilley)
Date: Wed, 15 Feb 2006 14:24:30 -0500
Subject: %SystemDrive%
In-Reply-To: <mailman.1965.1140031059.27775.python-list@python.org>
References: <dsvt14$rev$1@solaris.cc.vt.edu> <43F37BDE.9020505@activestate.com>
	<mailman.1965.1140031059.27775.python-list@python.org>
Message-ID: <dsvv5j$4dm$1@solaris.cc.vt.edu>

Carsten Haese wrote:

> Is there a reason why os.environ['SYSTEMDRIVE'] shouldn't work?
> 
> Hope this helps


I didn't know it was in os! It returns C: instead of C:\ like my method. 
Other than that, it seems to do the trick.

Thank you!
Brad


From paul at boddie.org.uk  Mon Feb 20 06:39:34 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 20 Feb 2006 03:39:34 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<yfsbqx3ov29.fsf@oc.ex.ac.uk>
	<mailman.2144.1140404154.27775.python-list@python.org>
Message-ID: <1140435574.434374.183940@o13g2000cwo.googlegroups.com>

Fredrik Lundh wrote:
> Alexander Schmolck wrote:
>
> > My point was that Guido probably (and fortunately!) was unaware of the extent
> > to which you can have both dynamism and speed
>
> any my point was that chosing to ignore something doesn't mean
> that you're ignorant.

I think it's more charitable (or rather, it possibly expresses the
intent behind the quoted text more accurately or objectively) to
rephrase "ignorance on Guido's part" and "Guido... was unaware of" with
"Guido's deliberate design decisions upon considering previous work on
dynamic language runtime implementation" and "Guido chose to disregard
strategies illustrating" respectively. Not that I actually profess to
know what Guido's knowledge of the field was in the late 1980s or what
he actually knows right now beyond what he has said in various articles
and interviews.

> (but since you keep repeating this nonsense, it's clear that you're
> pretty ignorant wrt. software design.  too much CS exposure?).

Unfortunate choices of words notwithstanding, I think the contributor
in question raises interesting issues at a level way above this kind of
response. Not that I actually profess to know what his level of "CS
exposure" is beyond a brief perusal of his Google Groups profile, but I
don't see how that really comes into play here, apart from as a
convenient put-down label.

Paul



From onurb at xiludom.gro  Tue Feb  7 04:54:04 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Tue, 07 Feb 2006 10:54:04 +0100
Subject: fairly large webapp: from Java to Python. experiences?
In-Reply-To: <1139005746.363918.267370@g47g2000cwa.googlegroups.com>
References: <1139005746.363918.267370@g47g2000cwa.googlegroups.com>
Message-ID: <43e86e54$0$506$636a15ce@news.free.fr>

john_sips_tea at yahoo.com wrote:

(snip)

> Does anyone here have any experience with large(ish) webapps in Python?

Depends on the definition of "large(ish)". If you use KLOC as a metric,
you can expect a Python solution to be 5 to 10 time smaller, so what's a
'large' app in Java may end up as a small/medium app with Python !-)

> I was sniffing around the following A-team of toolkits: CherryPy,
> Cheetah, SQLObject, all behind Apache2. 

If you plan to run behind Apache2, you may want to have a look at
Myghty. It's somewhere between a framework and a templating system, and
the architecture is based on Perl's HTML::Mason, which has proven to be
successful. It adds to Mason the possibility to take a clean MVC
approach (as well as the more ServerPage oriented approach of Mason),
and can be deployed as either a mod_python handler, fastcgi, plain old
cgi, WSGI, and even as a standalone app (with a Python HTTPServer) for
developpement.

You may also want to take a look at Turbogears (CherryPy + SQLObject +
Kid + Mochikit) or Subway (CherryPy + SQLObject + Cheetah).


> Has anyone seen performance
> issues with Python webapps?

Actually, only with Plone or CPS (or other ZopeCMF based app). Zope
itself is pretty usable, but the whole CMF part is a monstruosity IMHO.

> Could one reasonably expect to have an easier time with maintainence
> and future modifications with using Python over Java?

Err... It of course depends on first having well written code and a
sensible design, but when it comes to agility - and as long as you stay
away from Zope's CMF !-) -, I bet that Python beats Java hands down.

> Any tips, stories, recommendations, and/or experiences are most
> welcome.

It took me about one month to write my first Zope application - an
ad-hoc mix of an online catalog and basic CMS (pages, news,
downloadables files, ...), with LDAP and PostgresSQL in the mix,
fulltext and advanced search, newsletter subscription, a 'members' zone
etc. I had to learn Zope during the process, and I guess I could
actually rewrite the whole thing in less than 2 weeks with a much better
design - but what, the app is in production for 2 years with near zero
corrective maintenance (the biggest problem we had was with system
updates messing with the psycopg adapter...), gives full satisfaction to
the customer, and has for now proven to be  very easy to modify and
evolve (so easy that we didn't even bothered to bill the customer for
much of the modification requests)...  And Zope is certainly not known
as the most agile or lightweight Python web framework/application server !-)



-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From tim at pollenation.net  Wed Feb 15 15:17:33 2006
From: tim at pollenation.net (Tim Parkin)
Date: Wed, 15 Feb 2006 20:17:33 +0000
Subject: Python, Forms, Databases
In-Reply-To: <dt01n4$d8k$1@apollon.grec.isp.9tel.net>
References: <1140030788.083799.45060@f14g2000cwb.googlegroups.com>	<xoOdnSSGbYRFHW7eRVn-og@comcast.com>	<1140032343.627599.217590@g14g2000cwa.googlegroups.com>
	<dt01n4$d8k$1@apollon.grec.isp.9tel.net>
Message-ID: <43F38C5D.7080609@pollenation.net>

Xavier Morel wrote:
> Tempo wrote:
> 
>>Larry I do see your point. There does seem to be a lot more support for
>>PHP and MySQL together than there is Python and ASP. But I want to
>>first try to accomplish my goal by using Python first before I give up
>>and revert back to PHP. So if I was going to parse HTML forms and place
>>the data into a MySQL database, what should I use? CGI module? Zope?
>>Webware? Thanks for any and all help.
>>
> 
> If you're talking about a pair of page and nothing more, the CGI module 
> and manually handling your stuff (with a DBAPI2 MySQL module for the DB 
> link) is more than enough.
> 
> If you want to create something more complex (a full database driven 
> website), it would probably be a good idea to check some of Python's web 
> frameworks, Django for example.

Simple cgi example

http://www.ibiblio.org/obp/pyBiblio/tips/wilson/basiccgi.php

or you can go the more complex route which generates, validates and
parses forms for you.

http://divmod.org/trac/wiki/DivmodNevow/FormHandling

for which you'll need twisted sumo and pollenations forms package

Here is some sample code:

http://divmod.org/trac/attachment/wiki/DivmodNevow/FormHandling/Example1.2.tac.py

Tim Parkin



From mayyash at gmail.com  Thu Feb 16 02:27:46 2006
From: mayyash at gmail.com (fileexit)
Date: 15 Feb 2006 23:27:46 -0800
Subject: How to run shell commands within python
In-Reply-To: <dt19cr$otl$1@oravannahka.helsinki.fi>
References: <1140074469.258382.24620@f14g2000cwb.googlegroups.com>
	<dt19cr$otl$1@oravannahka.helsinki.fi>
Message-ID: <1140074866.157972.214920@o13g2000cwo.googlegroups.com>

thanks... i was to hasty to post this question, i found a good answer
here:
http://groups.google.com/group/comp.lang.python/browse_thread/thread/ffdab847125f81b6



From claird at lairds.us  Mon Feb 13 11:08:02 2006
From: claird at lairds.us (Cameron Laird)
Date: Mon, 13 Feb 2006 16:08:02 GMT
Subject: Arcane deployment considerations (was: Single-file executables)
References: <daadb$43ee6b05$4275d90a$28181@FUSE.NET>
	<43EE7C2A.3040102@v.loewis.de>
	<mailman.1794.1139778796.27775.python-list@python.org>
Message-ID: <amk6c3-5ju.ln1@lairds.us>

In article <mailman.1794.1139778796.27775.python-list at python.org>,
Thomas Heller  <theller at python.net> wrote:
			.
			.
			.
>Usually the bundle=1 option in py2exe can create a single file exe, but it also
>allows to have a separate shared library.zip file, which is useful if
>you need more than
>one exe-file.  With python 2.4, MSVCR71.dll is still required and not
			.
			.
			.
For some of our projects, we provide a single executable, which
takes a command-line argument (or, rarely, environment variable)
to tell the executable whether to come up as server or client,
or GUI or command-line version, or ...  The result is that, even
for an architecturally-sophisticated development, the end-user
experiences a unitary delivery; he has just one file to install,
remove, archive, ...  


From siddharthdave84 at gmail.com  Sat Feb 18 11:11:31 2006
From: siddharthdave84 at gmail.com (al pacino)
Date: 18 Feb 2006 08:11:31 -0800
Subject: GDI in python>?
In-Reply-To: <dt6u2m$eso$1@newsreader3.netcologne.de>
References: <1140242543.204760.174390@g44g2000cwa.googlegroups.com>
	<dt6u2m$eso$1@newsreader3.netcologne.de>
Message-ID: <1140279090.986170.157300@g14g2000cwa.googlegroups.com>

Thanks claudio, that should work out fine.



From webraviteja at gmail.com  Tue Feb  7 03:59:52 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 7 Feb 2006 00:59:52 -0800
Subject: Compiling
In-Reply-To: <43E7CCC0.8070009@v.loewis.de>
References: <mailman.1387.1138986082.27775.python-list@python.org>
	<43e392d1$0$31853$626a54ce@news.free.fr>
	<mailman.1390.1138988111.27775.python-list@python.org>
	<43e3972f$0$624$626a14ce@news.free.fr>
	<1139149306.188367.193770@g47g2000cwa.googlegroups.com>
	<43E6493B.2050503@v.loewis.de>
	<1139209103.702078.156180@g47g2000cwa.googlegroups.com>
	<43E7CCC0.8070009@v.loewis.de>
Message-ID: <1139302792.921496.140580@o13g2000cwo.googlegroups.com>


Martin v. L?wis wrote:
> Ravi Teja wrote:
> > But more often I am looking to use Python libraries
> > in other languages since I am more familiar with them and they
> > typically tend to be more high level (the way I like it) than the
> > standard libraries of others.
>
> Ah. In that case, the normal C API should work fine to call into Python
> in most cases, no? If not, have you tried the CXX package, or
> Boost::Python?

I am aware of those. But my "other" languages are not C/C++. Sure I
could first wrap them in a DLL written in C/C++ using CXX/Boost and
then call the DLL from the language in question. But that is more
trouble than it is worth.



From aleaxit at yahoo.com  Tue Feb 21 00:57:49 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 20 Feb 2006 21:57:49 -0800
Subject: Multiple assignment and the expression on the right side
References: <dte84b$568$1@home.itg.ti.com>
Message-ID: <1hb2v8p.stwgof10kmfz2N%aleaxit@yahoo.com>

Suresh Jeevanandam <jm.suresh at gmail.com> wrote:

> Dear all,
>       I read in "Python in a Nutshell" that when we have multiple assignments
> made on a single line, it is equivalent to have those many simple 
> assignments and that the right side is evaluated once for each 
> assignment. [The wordings are mine. I am not sure if this is what he 
> intended].

Since the original text is:

"""
Each time the statement executes, the right-hand side expression is
evaluated once. Each target gets bound to the single object returned by
the expression.
"""

it might be interesting to understand how you managed to translate ONCE
into ONCE PER ASSIGNMENT TARGET.  I can most earnestly assure you that
when I wrote ONCE I meant ONCE. If ONCE meant TWICE (or more), how could
there be a guaranteed SINGLE OBJECT to which each target gets bound?

>       So, In the following code snippet I expected the values of c, d, e to
> be different. But they are not? I am missing something... What is it?

A good command of English, maybe?  With that ONCE and SINGLE in there,
no matter how much I try to, I just cannot see ambiguity in the words I
had written.  Nevertheless, in your honor, I guess I will redundantly
change the ONCE into JUST ONCE in the second edition (I do strive for
maximum conciseness in the Nutshell, but I guess I can spare one extra
four-letter word, even though this is the only time I ever heard anybody
express any doubt or misunderstanding about this paragraph).


Alex


From python.list at tim.thechases.com  Fri Feb  3 10:56:22 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Fri, 03 Feb 2006 09:56:22 -0600
Subject: Regular expression query
In-Reply-To: <1138976443.473320.315170@g44g2000cwa.googlegroups.com>
References: <1138976443.473320.315170@g44g2000cwa.googlegroups.com>
Message-ID: <43E37D26.7030709@tim.thechases.com>

> "parameter=12ab"
> "parameter=12ab foo bar"
> "parameter='12ab'"
> "parameter='12ab' biz boz"
> "parameter="12ab""
> "parameter="12ab" junk"
> 
> in each case returning 12ab as a match. "parameter" is known and fixed.
> The parameter value may or may not be enclosed in single or double
> quotes, and may or may not be the last thing on the line. If the value
> is quoted, it may contain spaces.
> 
> I've tried a regex of the form:
> re.compile(r'parameter=(["\']?(.*?)\1( *|$)')

Below is a test-harness that seemed to spit out the results you 
want (I threw in some bogus tests to make sure they failed too) 
with the given value for "exp".

The resulting match object will have your desired value in 
group(1)...though it will include whatever quotes happened to be 
in it.  You may also need to anchor accordingly with "^" and "$"

It doesn't gracefully handle escaped quotes in your value

-tim


import re
tests = [
('parameter=12ab', True),
('parameter=12ab foo bar', True),
("parameter='12ab'", True),
("parameter='12ab' biz boz", True),
('parameter="12ab"', True),
('parameter="12ab" junk', True),
('parameter="12ab', False),
('parameter=\'12ab', False),
('parameter="12ab\'', False),
('parameter="12ab\' foo baz', False)
]
exp = r'parameter=((["\'])(.*?)\2|[^\'" ]+).*'
r = re.compile(exp)
print "Using regexp: %s" % exp
for test,expectedResult in tests:
     if r.match(test):
         result = True
     else:
         result = False
     if result == expectedResult:
         print "[%s] passed" % test
     else:
         print "[%s] failed (expected %s, got %s)" % (test, 
expectedResult, result)







From python at rcn.com  Tue Feb  7 03:27:05 2006
From: python at rcn.com (Raymond Hettinger)
Date: 7 Feb 2006 00:27:05 -0800
Subject: Question about idioms for clearing a list
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
Message-ID: <1139300825.858426.12680@o13g2000cwo.googlegroups.com>

[Steven D'Aprano]
> > The Zen isn't "only one way to do it". If it were, we
> > wouldn't need iterators, list comps or for loops,
> > because they can all be handled with a while loop (at
> > various costs of efficiency, clarity or obviousness).
> >
> > del L[:] works, but unless you are Dutch, it fails the
> > obviousness test.

[Fredrik Lundh]
> unless you read some documentation, that is.  del on sequences
> and mappings is a pretty fundamental part of Python.  so are slicings.
>
> both are things that you're likely to need and learn long before you
> end up in situation where you need to be able to clear an aliased
> sequence.

Fred is exactly correct.  Slicing is absolutely basic to Python.
Accordingly, it gets covered right at the beginning of the tutorial
(section 3.1).  Likewise, the del keyword is fundamental -- if you
can't get, set, and del, then you need to go back to collections
school.

Also specious is the suggestion that dir(L) or help(L) is useless.  The
entries for the __delitem__ and __delslice__ methods are no more hidden
than for __getitem__ or __add__.  The help entry goes a step further
and shows the translation to del x[y] and del x[i:j].

While the sentiment behind the list.clear() suggestion is noble, it is
an exercise in futility to design a language around the presumption
that other programmers are incapable of learning the basics of the
language.

There was a pithy Tim Peters quotation to the effect that he was
unpersuaded by language proposals predicated on some hypothetical
average programmer not being smart enough to understand something that
the rest of us find to be basic.


Raymond Hettinger



From dieterv.removethis at optionexplicit.be  Sat Feb 11 08:58:38 2006
From: dieterv.removethis at optionexplicit.be (Dieter Verfaillie)
Date: Sat, 11 Feb 2006 13:58:38 GMT
Subject: PyGTK
References: <1139413605.029688.130040@f14g2000cwb.googlegroups.com>
	<slrndumdto.g3i.davecook@localhost.localdomain>
Message-ID: <i4mHf.249540$Le.7816289@phobos.telenet-ops.be>

On Thu, 09 Feb 2006 12:38:26 +0000, Dave Cook wrote:
> 
> particularly the last section on how to create an EXE from your pygtk program.
> 

That recipe isn't optimal with newer gtk versions (starting from 2.8 if I
remember correctly). Look here instead:
http://starship.python.net/crew/theller/moin.cgi/Py2exeAndPyGTK

Dieter


From bob at greschke.com  Mon Feb  6 22:11:28 2006
From: bob at greschke.com (Bob Greschke)
Date: Mon, 6 Feb 2006 20:11:28 -0700
Subject: Getting Tkinter Text contents before destruction
Message-ID: <p4KdnfDfuth6knXeRVn-jw@nmt.edu>

Hi!

I want to grab the contents of a Text widget when the frame it's on gets 
destroyed.  I tried TextWidget.bind("<Destroy>"... , but the widget is gone 
before the call gets made, and I'd really hate to do something with the 
function that gets called with TextWidgetsFrame.bind("<Destroy>", ..., since 
that one function handles all of the frames in the program...or would that 
even work?

How can I do this?

Thanks!

Bob




From bearophileHUGS at lycos.com  Sun Feb 26 16:47:18 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 26 Feb 2006 13:47:18 -0800
Subject: sort one list using the values from another list
In-Reply-To: <9bpMf.109707$4l5.58949@dukeread05>
References: <mailman.2447.1140969980.27775.python-list@python.org>
	<Bb-dncKoOeYvQ5zZRVn-uw@comcast.com>
	<1140981038.788111.93500@j33g2000cwa.googlegroups.com>
	<9bpMf.109707$4l5.58949@dukeread05>
Message-ID: <1140990438.693026.14600@p10g2000cwp.googlegroups.com>

>It's faster on my system because d.keys() is already sorted.  But that may not be the case on other versions of python.<

In my version it's a little slower. But what system are you using where
keys is already sorted? IronPython maybe?

Bye,
bearophile



From bblais at bryant.edu  Mon Feb  6 06:18:54 2006
From: bblais at bryant.edu (Brian Blais)
Date: Mon, 06 Feb 2006 06:18:54 -0500
Subject: Numeric and matlab
In-Reply-To: <ds5tmv$7eg$1@sea.gmane.org>
References: <43E66D81.20906@bryant.edu> <ds5tmv$7eg$1@sea.gmane.org>
Message-ID: <43E7309E.7040101@bryant.edu>

Robert Kern wrote:
> A better place to ask would be numpy-discussion at lists.sourceforge.net . By the
> way, Numeric has undergone a rewrite and is now known as numpy.
> 

thanks for the pointer!  it is a bit confusing with all of the different numerical
modules (Numeric, numpy, scipy, ScientificPython, numarray, etc...) to keep them all
straight.  importing numpy works quite well, and does all of the examples that you
provided.


		thanks!


				bb
-- 
-----------------

             bblais at bryant.edu
             http://web.bryant.edu/~bblais




From reply.in.the.newsgroup at my.address.is.invalid  Fri Feb 10 18:02:33 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Sat, 11 Feb 2006 00:02:33 +0100
Subject: installing python on a server?
References: <PB6Hf.1596$No6.37972@news.tufts.edu>
	<hntpu1pmctfaa61ns32k539nisvvljd96n@4ax.com>
	<DV6Hf.1597$No6.37987@news.tufts.edu>
Message-ID: <6l6qu1ht80mi4rok0ha861lvabh6fte4pb@4ax.com>

John Salerno:
>Hmm, sounds easy, yet I don't know where to start. 

try:
    browser.browse(http://www.python.org/download/)
    package = download(yourPlatform)
    package.unpack()
    exec(README.read())
except:
    post specifics

-- 
Ren? Pijlman


From lblr33 at yahoo.com  Wed Feb  8 19:00:41 2006
From: lblr33 at yahoo.com (lblr33 at yahoo.com)
Date: 8 Feb 2006 16:00:41 -0800
Subject: cx_Oracle entry point error
Message-ID: <1139443241.183372.296780@o13g2000cwo.googlegroups.com>

I downloaded cx_Oracle from
http://www.cxtools.net/default.aspx?nav=cxorlb and selected the windows
installer for Oracle 8i, Python 2.4

>From the readme.txt file:
BINARY INSTALL:
Place the file cx_Oracle.pyd or cx_Oracle.so anywhere on your Python
path.

So I tried this and set PYTHONPATH.

I then created a script called ora_conn.py with one line:
import cx_Oracle

When I run the script (c:\python24\python.exe ora_conn.py) I get this
error in a pop-up box:

"The procedure entry point OCIEnvCreate could not be located in the
dynamic link ligrary OCI.dll

The bottom line of what I want to do is to connect to an oracle
database without having to create an ODBC connection on the individual
PC.

Any ideas?  Thanks.



From fuzzyman at gmail.com  Thu Feb 16 03:43:25 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 16 Feb 2006 00:43:25 -0800
Subject: HTTP & tcl
In-Reply-To: <1140055458.631283.202510@f14g2000cwb.googlegroups.com>
References: <1140055458.631283.202510@f14g2000cwb.googlegroups.com>
Message-ID: <1140079405.290586.298270@g44g2000cwa.googlegroups.com>


alf wrote:
> Hi
>
> I would like to convert the wctpXml-1.3.py program to Tcl (line by
> line).
> See http://sourceforge.net/project/showfiles.php?group_id=29217
> This program sends pages using WCTP.  I know nothing about Python or
> XML but this program is small and seems straightforward and I am sure
> that I will be able to figure it out - with a little help ;-)
> Currently I am stuck in not being able to identify the Tcl equivalent
> of Python's "putrequest", as in:
> h = httplib.HTTP("wctp.skytel.com",80)
> h.putrequest("POST","/wctp")
>

You'll get more help on Tcl syntax in a Tcl group. :-)

Of the HTTP object, the Python documentation says :

The HTTP class is retained only for backward compatibility with 1.5.2.
It should not be used in new code. Refer to the online docstrings for
usage.

(Meaning that you will find more help on the use of that module in the
source code - which can also be accessed through Python's pydoc
feature).


I assume it does what the newer ``HTTPConnection`` class does. The
putrequest method does the following :

putrequest( request, selector[, skip_host[, skip_accept_encoding]])

This should be the first call after the connection to the server has
been made. It sends a line to the server consisting of the request
string, the selector string, and the HTTP version (HTTP/1.1). To
disable automatic sending of Host: or Accept-Encoding: headers (for
example to accept additional content encodings), specify skip_host or
skip_accept_encoding with non-False values. Changed in version 2.4:
skip_accept_encoding argument added.

In other words - you're creating an HTTP connection and request. You'll
need to find an 'equivalent' library for Tcl and convert the request
using hte semantics of whatever library you choose.


All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml

> Thanks
> alf



From nick-news at net4u.hr  Mon Feb 27 07:16:03 2006
From: nick-news at net4u.hr (Nikola Skoric)
Date: Mon, 27 Feb 2006 13:16:03 +0100
Subject: making 'utf-8' default codec
Message-ID: <MPG.1e6d0bea15971bcb989832@news.htnet.hr>

Hi there,

Is there a way of making 'utf-8' default codec for the whole program, so 
I don't have to do .encode('utf-8') every time I print out a string?

-- 
"Now the storm has passed over me
I'm left to drift on a dead calm sea
And watch her forever through the cracks in the beams
Nailed across the doorways of the bedrooms of my dreams"


From catdude at catfolks.net  Mon Feb 13 19:58:15 2006
From: catdude at catfolks.net (CatDude)
Date: Mon, 13 Feb 2006 16:58:15 -0800
Subject: hard disk activity
References: <1139850420.902979.71620@o13g2000cwo.googlegroups.com>
	<g9i1v1lbf2rhmgskmkh5f9mt73s67umckk@4ax.com>
	<1139857505.376840.37440@g43g2000cwa.googlegroups.com>
	<1139859890.407497.124870@o13g2000cwo.googlegroups.com>
	<1139863885.755813.324450@g47g2000cwa.googlegroups.com>
	<7xfymn0yda.fsf@ruckus.brouhaha.com>
	<1139864840.300396.170070@o13g2000cwo.googlegroups.com>
	<7xbqxb0xo0.fsf@ruckus.brouhaha.com>
	<1139866059.604198.245040@g44g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.14.00.58.15.83417@catfolks.net>

> So I'm wondering if you know off-hand which windows port does this
> checksum validation you outlined.

http://www.gaztronics.net/rsync.php is one source. Just do a Google search
for "windows rsync".


From danmcleran at yahoo.com  Mon Feb 20 11:36:19 2006
From: danmcleran at yahoo.com (danmcleran at yahoo.com)
Date: 20 Feb 2006 08:36:19 -0800
Subject: Processing text using python
In-Reply-To: <1140451760.998278.90430@g43g2000cwa.googlegroups.com>
References: <1140451760.998278.90430@g43g2000cwa.googlegroups.com>
Message-ID: <1140453379.593658.160770@g44g2000cwa.googlegroups.com>

I think this is what you want:

file = open(r'c:/test.txt','r')

c = file.read(3)
while c:
    print c
    c = file.read(3)

file.close();



From matteosartori at gmail.com  Fri Feb 24 11:19:59 2006
From: matteosartori at gmail.com (matteosartori at gmail.com)
Date: 24 Feb 2006 08:19:59 -0800
Subject: Regular expression fun. Repeated matching of a group Q
In-Reply-To: <1140796529.104793.54160@e56g2000cwe.googlegroups.com>
References: <1140794885.460929.223080@i39g2000cwa.googlegroups.com>
	<1140796529.104793.54160@e56g2000cwe.googlegroups.com>
Message-ID: <1140797999.467407.173080@u72g2000cwu.googlegroups.com>

Thanks,

The date = sanesplit[1] line complains about the "list index being out
of range", which is probably due to the fact that not all lines have
the <td> in them, something i didn't explain in the previous post.

I'd need some way of ensuring, as with the pattern I'd concocted, that
a valid line actually starts with a <td> containing a / separated date
tag.

As an aside, is it not actually possible to do what I was trying with a
single pattern or is it just not practical?

M@



From larry.bates at websafe.com  Sat Feb 25 16:20:33 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Sat, 25 Feb 2006 15:20:33 -0600
Subject: Grabbing a object from the current code block using a callable
	statement?
In-Reply-To: <1140891784.031515.280720@j33g2000cwa.googlegroups.com>
References: <1140891784.031515.280720@j33g2000cwa.googlegroups.com>
Message-ID: <4400CA21.2080601@websafe.com>

ChaosKCW wrote:
> Hi
> 
> Is it possible to grab get an object returned from a string and a
> callable ? e.g
> 
> I pass in a key value pair:
> 
> def somemethod(adict = {'new name for object': '<code to reutrn
> obejct>'}):
> 
> object = .....
> 
>     for key, value in adict.items():
>         if callable(value):
>             somedict[key] = value()
>         else:
>             somedict[key] = value
> 
> such that
> 
> somedict  = {'new name for object': object} 
> 
> ??
> 
> Thanks,
> 

If you are asking if an object instance can be stored in a dictionary
the answer is yes.

example:

>>> class foo:
... 	def method(self):
... 		print "in foo.method"
... 		return
... 	
>>> adict={'fooclass': foo()}
>>> adict['fooclass'].method()
in foo.method
>>>

Instances of classes are just like any other data you might put into
a list or a dictionary.  I hope that is what you were asking.

-Larry Bates


From kayama at st.rim.or.jp  Sun Feb 26 17:49:46 2006
From: kayama at st.rim.or.jp (Akihiro KAYAMA)
Date: Mon, 27 Feb 2006 07:49:46 +0900 (JST)
Subject: Pure python implementation of string-like class
In-Reply-To: <1140975976.471949.20940@t39g2000cwt.googlegroups.com>
References: <1140915354.024788.25720@z34g2000cwc.googlegroups.com>
	<dts5tc$9d$1@apollon.grec.isp.9tel.net>
	<1140975976.471949.20940@t39g2000cwt.googlegroups.com>
Message-ID: <20060227.074946.74672977.kayama@st.rim.or.jp>


Hi Ross. 

Thanks a lot for your clarifying. I didn't think my post could be an
Unicode frame. 

I don't know this mailing list is the right place talking about
Unicode issue, but as for me, a million codespace which UTF-16 brings
is not enough. It presume that same characters has a same codepoint.
But differs from the simple and beauty Roman Alphabet, it is sometimes
difficult to decide two kanji characters are "same" or not. Because
its glyph swings with various reason(ex. who, when and where it's
wrote). So first of all we assign codepoints, and next we consider
that "this character which appears in this Chinese historical book may
be the same character as this character in Unicode CJK Extension
A". Such an identifying characters is also one of my project's tasks.
I think this can be explanation why UTF-16 is enough for majority but
not for all.

Anyway, I suppose that implementing string-like classes is a generic
python issue. For example, it will be useful if a rich text class
which has style attributes like bold on each characters has also
string-like methods and can be dealt with like a string.

In article <1140975976.471949.20940 at t39g2000cwt.googlegroups.com>,
"Ross Ridge" <rridge at csclub.uwaterloo.ca> writes:

rridge> thiking about it, it might actually make sense to use strings as the
rridge> internal representation as a lot operations can be implemented by using
rridge> the standard string operation but multipling the offsets and lengths by
rridge> 4.

Ah, COOL! It sounds very nice. I'll try it.
Thanks again.

-- kayama


From haraldarminmassa at gmail.com  Mon Feb 20 02:39:35 2006
From: haraldarminmassa at gmail.com (Harald Armin  Massa)
Date: 19 Feb 2006 23:39:35 -0800
Subject: How many web framework for python ?
In-Reply-To: <43f8718e$0$7344$626a54ce@news.free.fr>
References: <mailman.2085.1140244423.27775.python-list@python.org>
	<43f8718e$0$7344$626a54ce@news.free.fr>
Message-ID: <1140421175.502067.235980@f14g2000cwb.googlegroups.com>

Bruno,

>In fact, there are actually too much *good* python web frameworks.

I tended to share that opinion, just because there are more web
frameworks then keywords in Python. But we should stop thinking of this
as a bug; it is a feature.

Because everyone and his girlfriend creates an own web framework for
Python, we have a clear security advantage over other languages. One
"ruby on rails" worm will bring down at least 2000 web 2.0 beta sites.
A worm for a Python web framework will be incompatible with all others.

Harald



From michaeltaft at gmail.com  Thu Feb  9 12:48:28 2006
From: michaeltaft at gmail.com (mwt)
Date: 9 Feb 2006 09:48:28 -0800
Subject: CLI
Message-ID: <1139507308.888959.320480@f14g2000cwb.googlegroups.com>

I want to do programmatic terminal commands on unix with python - i.e.
I want my program to issue commands to start and stop scripts, other
programs, etc. I'm sure this must be fairly straightforward, but
haven't been able to find a reference for it. Any help?



From felipe.lessa at gmail.com  Mon Feb 20 19:32:07 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Mon, 20 Feb 2006 21:32:07 -0300
Subject: Is inifinite loop not a good practice?
In-Reply-To: <roy-40C65C.17010620022006@reader2.panix.com>
References: <43F9DF68.5020301@gmail.com>
	<mailman.2182.1140471719.27775.python-list@python.org>
	<roy-40C65C.17010620022006@reader2.panix.com>
Message-ID: <1140481928.3937.3.camel@kenshin>

Em Seg, 2006-02-20 ?s 17:01 -0500, Roy Smith escreveu: 
> In article <mailman.2182.1140471719.27775.python-list at python.org>,
>  "Terry Reedy" <tjreedy at udel.edu> wrote:
> > def fact(n):
> >   res = 1
> >   while n != 0:
> >     res *= n
> >     n -= 1
> >   return res
> > 
> > fact(-1)
> 
> Could be worse.  You could have written:
> 
> def fact(n):
>    if n == 0:
>       return 1
>    else:
>      return n * fact (n-1)
> 
> then you would have not only gotten zonked on CPU charges, but on memory 
> charges as well :-)

This is not worse. Sometime in the future the function will raise a
RuntimeError with "maximum recursion depth exceeded" and free all system
resources, but the other one (without recursive calls) will only grow
and grow and grow...

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From nogradi at gmail.com  Thu Feb  2 12:04:34 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Thu, 2 Feb 2006 18:04:34 +0100
Subject: OO conventions
In-Reply-To: <1138888210.827054.68690@g49g2000cwa.googlegroups.com>
References: <mailman.1334.1138833641.27775.python-list@python.org>
	<pan.2006.02.01.23.03.37.881298@zetafunc.net>
	<mailman.1336.1138835495.27775.python-list@python.org>
	<1138888210.827054.68690@g49g2000cwa.googlegroups.com>
Message-ID: <5f56302b0602020904h4a130392kf0a8730f5a53d097@mail.gmail.com>

> > > In this case, Image seems to be a python module, with the open function
> > > defined, PIL's Image is not a class.
> > >
> >
> > Thanks for the enlightening remarks, especially this last one, indeed,
> > it's not a class.
>
> Actually, this way of creating a class instance is good OO practice in
> many places: The Image.open() method acts as a factory-function for
> creating Image objects.
> You don't know, until you inspect the return value, if the created
> object is actually an instance of class Image or something which just
> happens to behave like one...
> It could for instance be a sub-class of Image, JpegImage, if that
> better suits the class library designers.
> In general, factory-functions allow greater uncoupling between
> interface and implementation.
>

>From all the enlightening replies it seems to me that my next task
should be to look into what 'factory functions' are. Whenever I've
seen the word 'factory' I just skipped it, knowing that if I really
need to know what it is, I'll come back to it later. Apparently it's
just about time, thanks all for the comments.


From onurb at xiludom.gro  Wed Feb  8 08:32:55 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Wed, 08 Feb 2006 14:32:55 +0100
Subject: module with __call__ defined is not callable?
In-Reply-To: <mailman.1591.1139400885.27775.python-list@python.org>
References: <mailman.1580.1139367500.27775.python-list@python.org>	<pan.2006.02.08.10.21.24.46790@REMOVETHIScyber.com.au>	<1139394463.255902.168960@f14g2000cwb.googlegroups.com>
	<mailman.1591.1139400885.27775.python-list@python.org>
Message-ID: <43e9f320$0$612$636a15ce@news.free.fr>

Steve Holden wrote:
(snip)
> The pursuit of orthogonality, while admirable, can lead to insanity if
> pushed too far.
> 

+1 QOTW

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From paddy3118 at netscape.net  Wed Feb 15 15:37:40 2006
From: paddy3118 at netscape.net (Paddy)
Date: 15 Feb 2006 12:37:40 -0800
Subject: how do you pronounce 'tuple'?
In-Reply-To: <mailman.1921.1139952846.27775.python-list@python.org>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<1139863824.940773.36310@f14g2000cwb.googlegroups.com>
	<dsr69f$epf$1@news.freedom2surf.net>
	<1139904696.784092.224740@o13g2000cwo.googlegroups.com>
	<mailman.1921.1139952846.27775.python-list@python.org>
Message-ID: <1140035860.332508.132040@g44g2000cwa.googlegroups.com>

So thats were its from.
My Parents used to quote it to me when I were a 'wee lad',
So they read Burns....

-Pad.



From aisaac0 at verizon.net  Sun Feb 19 10:25:47 2006
From: aisaac0 at verizon.net (David Isaac)
Date: Sun, 19 Feb 2006 15:25:47 GMT
Subject: define loop statement?
References: <lW4Jf.31559$3V4.8390@trnddc06>
	<mailman.2114.1140318344.27775.python-list@python.org>
Message-ID: <%50Kf.1181$p13.791@trnddc08>


"Benji York" <benji at benjiyork.com> wrote in message
news:mailman.2114.1140318344.27775.python-list at python.org...
> Here's a flagrant hack:

Admiration wins out over revulsion.  ;-)
Thanks,
Alan Isaac

PS Here's the motivation.  Python closely resembles pseudocode.  With
a very little LaTeX hacking, it is often possible to write algorithms is
Python that typeset as reasonable pseudocode.  A simple repetitive
loop is a bit of a sticking point.




From rridge at csclub.uwaterloo.ca  Tue Feb 21 13:50:57 2006
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 21 Feb 2006 10:50:57 -0800
Subject: Is there a way to build python without 'posixmodule' ?
In-Reply-To: <1140539098.139121.148350@g44g2000cwa.googlegroups.com>
References: <1140539098.139121.148350@g44g2000cwa.googlegroups.com>
Message-ID: <1140547857.017094.18690@g43g2000cwa.googlegroups.com>


mrstephengross wrote:
> I'm working on building python 2.4.2 with the mingw compiler (on
> cygwin).

Try following the instructions on the pyMinGW site:

    http://jove.prohosting.com/iwave/ipython/pyMinGW.html

                                             Ross Ridge



From girodt at gmail.com  Tue Feb 14 09:01:05 2006
From: girodt at gmail.com (Thomas Girod)
Date: 14 Feb 2006 06:01:05 -0800
Subject: listing attributes
In-Reply-To: <dssh03$7sa$1@online.de>
References: <1139884643.749492.221140@g43g2000cwa.googlegroups.com>
	<mailman.1876.1139887198.27775.python-list@python.org>
	<pan.2006.02.14.11.03.42.625075@REMOVETHIScyber.com.au>
	<dssh03$7sa$1@online.de>
Message-ID: <1139925665.499272.301130@f14g2000cwb.googlegroups.com>

Thanks a lot for all your answers !

Thanks to you I resolved this problem. Here is what i've done :

 [...]
 for (_,v) in getmembers(self):
    if isinstance(v,Property):
       st += "\t%s\n" % str(v)
 [...]

as all the attributes I want to get are instances of Property or a
subclass of Property, it does the trick.



From jjl at pobox.com  Thu Feb  9 15:26:59 2006
From: jjl at pobox.com (John J. Lee)
Date: 09 Feb 2006 20:26:59 +0000
Subject: Is Python good for web crawlers?
References: <1139330008.270988.227170@g44g2000cwa.googlegroups.com>
	<dscj3o$nll$1@wake.carmen.se>
	<1hafknf.1ft17us1sux13rN%aleaxit@yahoo.com>
Message-ID: <u3bisi8h8.fsf@pobox.com>

aleaxit at yahoo.com (Alex Martelli) writes:

> Magnus Lycka <lycka at carmen.se> wrote:
>    ...
> > I dunno, but there are these two guys, Sergey Brin and Lawrence Page,
> > who wrote a web crawler in Python. As far as I understood, they were
> > fairly successful with it. I think they called their system Koogle,
> > Bugle, or Gobble or something like that. Goo...can't remember.
> > 
> > See http://www-db.stanford.edu/~backrub/google.html
> 
> Yeah, I've heard of them, too.

I wonder if that little outfit has considered open-sourcing any of
their web client code?

(Declaring my interest: I'm maintaining, and very slowly developing,
some open-source libraries for web scraping and testing)


John



From fredrik at pythonware.com  Mon Feb 27 16:08:32 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 27 Feb 2006 22:08:32 +0100
Subject: expat
References: <4403652A.2040205@gmx.net>
Message-ID: <dtvpoj$vh$1@sea.gmane.org>

Katja Suess wrote:

> may I have a hint what the problem is in my situation?
> Is it a syntax error in sweetone.odt or in xml.parsers.expat?

> xml.parsers.expat.ExpatError: syntax error: line 1, column 0

it's a problem with the file you're parsing (either because it's not a
valid XML file, or because it's encoded in some non-standard way).

can you post the first few lines from that file ?

</F>





From reply.in.the.newsgroup at my.address.is.invalid  Wed Feb 22 09:29:50 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Wed, 22 Feb 2006 15:29:50 +0100
Subject: cookielib
References: <1140602092.438615.69450@f14g2000cwb.googlegroups.com>
Message-ID: <l5tov1p8e0616149265lda1neuddsuvmap@4ax.com>

sri2097:
>urllib2 does not support cookies. 

It does in 2.4. This code enables cookie support in all consequent calls
through urrlib2:

    import cookielib, urllib2
    opener = urllib2.build_opener(urllib2.HTTPCookieProcessor())
    urllib2.install_opener(opener)

-- 
Ren? Pijlman


From mistobaan at gmail.com  Sat Feb 18 08:03:54 2006
From: mistobaan at gmail.com (Fabrizio Milo)
Date: Sat, 18 Feb 2006 14:03:54 +0100
Subject: strange error I can't figure out...
In-Reply-To: <43F7188B.6040809@bryant.edu>
References: <43F7188B.6040809@bryant.edu>
Message-ID: <e437f2f0602180503m159c1351n6394a1033382ffd8@mail.gmail.com>

Is well indented ?


From steve at holdenweb.com  Fri Feb 10 18:23:17 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 10 Feb 2006 18:23:17 -0500
Subject: arrays in python
In-Reply-To: <43ED18AD.000007.03164@YOUR-4105E587B6>
References: <43ED18AD.000007.03164@YOUR-4105E587B6>
Message-ID: <dsj795$k8j$1@sea.gmane.org>

Kermit Rose wrote:
> From: Kermit Rose
> Date: 02/10/06 17:36:34
> To: python-help at python.org
> Subject: Arrays
>  
>   
> Hello.
>  
> I want to write a program in python using integer arrays.
>  
> I wish to calculate formulas using 200 digit integers.
>  
> I could not find any documentation in python manual about declaring arrays.
>  
> I searched the internet
>  
> and found an example that said I must declare
>  
> from Numeric import *
>  
>  
> and I downloaded a numerical python  extension,
>  
> but still  have not found a way to declare an array of given length.
>  
> The zeros function always gives me an error message.
>  

No need to do anything special. Python allows long integers, and you can 
calculate directly with them:

  >>> big1 = int('1' + 100*'2')
  >>> big2 = int('2' + 100*'3')
  >>> big1
12222222222222222222222222222222222222222222222222222222222222222222222222222222
222222222222222222222L
  >>> big2
23333333333333333333333333333333333333333333333333333333333333333333333333333333
333333333333333333333L
  >>> big1 + big2
35555555555555555555555555555555555555555555555555555555555555555555555555555555
555555555555555555555L
  >>>

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From rocky at panix.com  Wed Feb 22 18:03:30 2006
From: rocky at panix.com (R. Bernstein)
Date: 22 Feb 2006 18:03:30 -0500
Subject: using breakpoints in a normal interactive session
References: <1140636120.056812.119310@g43g2000cwa.googlegroups.com>
Message-ID: <wihzmkjyp19.fsf@panix3.panix.com>

dan.gass at gmail.com writes:

> Is there a way to temporarily halt execution of a script (without using
> a debugger) and have it put you in an interactive session where you
> have access to the locals?  

Here's what I was able to do using the Extended Python debugger.
http://bashdb.sourceforge.net/pydb/. I'm sure there's a similar (if
not even simpler) way to do this in the stock debugger; but I'll let
others suggest that ;-)

First add this routine:

def call_debugger():
    from pydbdisp import Display, DisplayNode
    import pydb, inspect, sys
    try:
        raise Exception
    except:
        frame=inspect.currentframe()
        p = pydb.Pdb()
        p.reset()
        p.display = Display()
        p._program_sys_argv = list(sys.argv)
        p.interaction(frame, sys.exc_traceback)

And then call it from your program as you indicated below for
"magic_breakpoint()". For "magic_resume()" just issue "quit"
"continue" or give a termanal EOF. 

That the above routine is so long suggests some initialization
probably should be moved around. And in a future release (if there is
one), I'll consider adding something like the above routine.


And possibly resume?  For example:
> 
> >>> def a():
> ...   x = 1
> ...   magic_breakpoint()
> ...   y = 1
> ...   print "got here"
> ...
> >>> a()
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "<stdin>", line 3, in a
>   File "<stdin>", line 2, in magic_breakpoint
> >>> x
> 1
> >>> y
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> NameError: name 'y' is not defined
> >>> magic_resume()
> got here
> >>> x
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> NameError: name 'x' is not defined


From gabriel.becedillas at gmail.com  Mon Feb  6 13:54:35 2006
From: gabriel.becedillas at gmail.com (gabriel.becedillas at gmail.com)
Date: 6 Feb 2006 10:54:35 -0800
Subject: Replace a module variable with a function call
Message-ID: <1139252075.497468.137100@g44g2000cwa.googlegroups.com>

I have a module that defines a variable with a constant value and now I
need to make that value dynamic, without affecting module clients. In
other words, I need to call a function witout using parenthesis.
Example:

mymod.py----------------------

def value():
    return "hi"

client.py--------------------------
import mymod

print mymod.value

Is there a way to do this ?
Thanks.



From toto at titi.de  Wed Feb  1 16:29:46 2006
From: toto at titi.de (toto)
Date: Wed, 01 Feb 2006 22:29:46 +0100
Subject: PIL and transparent GIFs
Message-ID: <43e12849$0$1145$7a628cd7@news.club-internet.fr>

Hi,

Does anybody know how to save an image in GIF format preserving transparent
background ??

Here's what I tested :

import Image, ImageDraw
im = Image.open('/path/to/model.gif') # An image with transparent backgroung
draw = ImageDraw.Draw(im)
draw.polygon([153,106,186,225,340,193,315,81,304,167], fill=9587)
im.save('/path/to/model1.gif', 'GIF')

And model1.gif has no transparent background anymore even if it's bigger
than my polygon selection.

Regards,

Laurent.


From rbell01824 at earthlink.net  Tue Feb  7 10:11:34 2006
From: rbell01824 at earthlink.net (puff)
Date: 7 Feb 2006 07:11:34 -0800
Subject: winguiauto
References: <1138647958.169038.239210@g49g2000cwa.googlegroups.com>
	<mailman.1540.1139307348.27775.python-list@python.org>
Message-ID: <1139325094.333434.291870@g43g2000cwa.googlegroups.com>

Thanks Simon.  I looked at the other two and ended up using your
version unmodified as the changes in watsup and pywinauto dealt with
things unique to their needs.  Your code still addresses basic needs
and rather well at that.

Regards



From lycka at carmen.se  Wed Feb  1 08:51:37 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 01 Feb 2006 14:51:37 +0100
Subject: Python vs C for a mail server
In-Reply-To: <mailman.1300.1138734448.27775.python-list@python.org>
References: <mailman.4249.1138728027.27774.python-list@python.org>
	<mailman.1300.1138734448.27775.python-list@python.org>
Message-ID: <drqeda$i3u$1@wake.carmen.se>

Jay Parlar wrote:
> Well guess what: The *only* code you'll have to change is inside the 
> function returning the object, none of the callers would have to change. 
> That's completely different from C++, where you'll have to change not 
> only the return type and the function, but you'll also have to change 
> every single calling function to be aware of this new db object. And not 
> just how the callers store the returned object, but also how they use 
> that object. That's a LOT of work, for really no gain.

Part of the problem is that both standard Python and C++ lacks the
concept of defining an interface. Whether we deal with C++ or Python,
we need to understand what we can do with a return value, or what kind
of interface a parameter we send to a function needs to provide. In
Python, this is implicit. The compiler doesn't force us to do the right
thing, and a programmer can make a mess by doing it wrong. In C++ it's
the opposite. By demanding a particular type, we restrain ourself to
using a set of values which is much smaller than the logic calls for,
or we can throw away all type checks by e.g. casting to void pointers.

I don't have enough experience with languages that provide interfaces,
such as Java, to understand how useful they are, but it's my impression
that they are too cumbersome to use fully. As far as I understand, most
Java APIs use types more than interfaces for parameters and return
values. (I browsed the Java API docs at java.sun.com, and as far as I
see, it seems the APIs always require parameters of distinct classes
or types, and return values of particular types or classes.)

I know that there have been attempts to provide interfaces in Python,
and it seems Zope Interfaces are getting a decent following, but
I don't think anyting like that will ever take the place that type
declarations of all function and class declarations have in e.g.
C++. It's too difficult to make interfaces so convenient and
flexible that they could be used generally in Python without taking
away a lot of power.


From michele.petrazzo at TOGLIunipex.it  Thu Feb 16 09:41:46 2006
From: michele.petrazzo at TOGLIunipex.it (Michele Petrazzo)
Date: Thu, 16 Feb 2006 15:41:46 +0100
Subject: ANN: FreeImagePy 1.2.2
In-Reply-To: <dt223q$s9n$1@newsreader3.netcologne.de>
References: <43f43ec3$0$29107$5fc30a8@news.tiscali.it>
	<dt223q$s9n$1@newsreader3.netcologne.de>
Message-ID: <43f48f29$0$29107$5fc30a8@news.tiscali.it>

Claudio Grondi wrote:
> Knowing some details about PIL and as good as no details about 
> FreeImage, I would like in this context to become enlightened by the 
> answer to the question, when does it make sense to use FreeImage 
> instead of PIL?

Into some little environments, like tiff with G3/G4 compressions and
multi-page files.

> From what I know up to now I can't see any use for FreeImage :-( .
> 

Like I say to freeimagepy site, I start to wrote it *only* because I
needed a simple python library for manipulate fax images (G3/G4) that
PIL can't. I need it into my python fax client [hylapex] that it's
connect to hylafax server.

Of course, It wouldn't be a PIl replacement ;)!

> Claudio

Michele


From k.suess at gmx.net  Tue Feb 28 03:11:20 2006
From: k.suess at gmx.net (Katja Suess)
Date: Tue, 28 Feb 2006 09:11:20 +0100
Subject: expat
In-Reply-To: <4403652A.2040205@gmx.net>
References: <4403652A.2040205@gmx.net>
Message-ID: <440405A8.3000405@gmx.net>

Merci ? Frederik et Jarek!
According to your hints I did tests with a different coding and another option in OpenOffice 'Size optimization for XML format'.
Went fine! - Back to my files from yesterday the same proper converting... uups
Anyway, it's running!
Katja


From sean at buildingonline.com  Thu Feb 16 15:30:47 2006
From: sean at buildingonline.com (SMB)
Date: Thu, 16 Feb 2006 12:30:47 -0800
Subject: Merging two lists of data (Pythonic way)
Message-ID: <8k5Jf.27896$sA3.57@fed1read02>

I have two lists of data like the following:

LIST1
 [[5L, 1L, 1L, 'Personal Information'], [14L, 2L, 1L, '']]

LIST2
[{'code': 5L, 'name': 'First Name', 'value': [''], 'label': 'First Name', 
'width': 0L, 'separator': ',', 'height': 0L, 'type': 2L, 'order': 1L}, 
{'code': 14L, 'name': 'Last Name', 'value': [''], 'label': 'Last Name', 
'width': 0L, 'separator': ',', 'height': 0L, 'type': 2L, 'order': 2L}, 
{'code': 16L, 'name': 'Job Title', 'value': [], 'label': 'Job Title', 
'width': 40L, 'separator': '', 'height': 0L, 'type': 2L, 'order': 3L}]

The important comparison values here are list[0] for each list in LIST1 and 
dictionary["code"] for each dictionary in LIST2.

What I am doing is looking for a pythonic way to parse the LIST2 "code" 
values and make appropriate changes to to each dictionary if the "code" 
value is the first element of a list in LIST1.

The final result may look like this given that the change is adding a new 
key/value of "VERIFIED"/1 for the matches.
LIST3
 [{'VERIFIED':1,'code': 5L, 'name': 'First Name', 'value': [''], 'label': 
'First Name', 'width': 0L, 'separator': ',', 'height': 0L, 'type': 2L, 
'order': 1L}, {'VERIFIED':1,'code': 14L, 'name': 'Last Name', 'value': [''], 
'label': 'Last Name', 'width': 0L, 'separator': ',', 'height': 0L, 'type': 
2L, 'order': 2L}, {'code': 16L, 'name': 'Job Title', 'value': [], 'label': 
'Job Title', 'width': 40L, 'separator': '', 'height': 0L, 'type': 2L, 
'order': 3L}]

I know I could do this with two for loops, but am looking for a better 
solution maybe involving list comprehension.

Any pointers are appreciated.
Thanks 




From ianb at colorstudy.com  Mon Feb 20 17:47:25 2006
From: ianb at colorstudy.com (Ian Bicking)
Date: 20 Feb 2006 14:47:25 -0800
Subject: Difference between CPython, Python for .NET and IronPython?
In-Reply-To: <dt7dtj$hio$1@newsreader3.netcologne.de>
References: <pGGJf.5441$zc1.999@amstwist00>
	<dt7dtj$hio$1@newsreader3.netcologne.de>
Message-ID: <1140475645.014369.172680@o13g2000cwo.googlegroups.com>

Claudio Grondi wrote:
> I have asked similar 'question' some weeks ago in the German Python
> newsgroup.
> It seems, that that Pythonistas have generally not much interest in
> IronPython waiting for at least release 2.0 of it which is _perhaps_
> expected to support Mono.

My understanding is that Mono developers are trying to make each
release of Mono support whatever the last release of IronPython was.
So there might be a lag, or you have to run a version behind, to use
Mono.  But it is supported.  At least, I think I read something to that
effect in the IronPython archives; I haven't tried it.

My more vague impression is that most Python people are happy enough
with CPython (because they better be happy, because that's what we've
had), and at least people like myself dread nothing more than trying to
install software or platforms.  I suppose there's also a group who are
interested in these interpreter/runtime level issues, but are working
away on PyPy.  PyPy has stolen away at least one major developer from
Jython (though in all fairness I think he'd mostly left anyway).

That said, I think concrete instructions on exactly how to get
IronPython up and working -- for someone with no .NET experience or
familiarity with that toolset -- would be an excellent way to bring
more attention to IronPython from the existing Python community.

  Ian



From tim at pollenation.net  Thu Feb  9 06:36:59 2006
From: tim at pollenation.net (Tim Parkin)
Date: Thu, 09 Feb 2006 11:36:59 +0000
Subject: Twisted book opinions?
In-Reply-To: <dsf7qb$2rl$1@scotsman.ed.ac.uk>
References: <mailman.1638.1139452774.27775.python-list@python.org>
	<dsf7qb$2rl$1@scotsman.ed.ac.uk>
Message-ID: <43EB295B.1020404@pollenation.net>

Eddie Corns wrote:
> Jay Parlar <jparlar at cogeco.ca> writes:
> 
> 
>>I was hoping to get some c.l.p. opinions on O'Reilly's new Twisted book.
> 
> 
> Well I certainly felt that I understood it better after reading the book.
> OTOH I haven't tried to put that knowledge into practice yet.
> 
> I think calling it a cookbook is misleading, it shows how to do essential
> tasks using fairly complete examples.

It's really more of an example based tutorial book than cookbook.
What it does do really well is 'networking programming essentials'. I
found it quite a good book and managed to write a distributed ssh cron
tool in an evening after reading the sections on SSH.

What I'd really like now is a 'Web Application Development with
Twisted/Nevow' book that takes off where this 'network protocol'
oriented book leaves off.

Tim Parkin


From rupole at hotmail.com  Wed Feb 15 07:12:15 2006
From: rupole at hotmail.com (Roger Upole)
Date: Wed, 15 Feb 2006 07:12:15 -0500
Subject: Python and ASP
References: <1139958137.733403.33640@g44g2000cwa.googlegroups.com>
	<1139961021_9771@sp6iad.superfeed.net>
	<1139967580.352137.246320@f14g2000cwb.googlegroups.com>
	<1139968235_9917@sp6iad.superfeed.net>
	<1139969137.852649.19580@f14g2000cwb.googlegroups.com>
Message-ID: <1140005576_10287@sp6iad.superfeed.net>

No, what I mean is that until you upload the file to the web server and
request it back thru the server, it's just a text source file.  However,
let me make sure I understood your previous post.  I had thought
you meant you were opening the ASP file directly, as in locally and
not from a web service.
Did I read that right ?

      Roger

"Tempo" <bradfordh at gmail.com> wrote in message news:1139969137.852649.19580 at f14g2000cwb.googlegroups.com...
> What do you mean? I can't just upload the file to the server that is
> going to host my site?
> 




----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! >100,000 Newsgroups
---= East/West-Coast Server Farms - Total Privacy via Encryption =---


From xavier.morel at masklinn.net  Mon Feb 20 11:34:53 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Mon, 20 Feb 2006 17:34:53 +0100
Subject: Processing text using python
In-Reply-To: <1140451760.998278.90430@g43g2000cwa.googlegroups.com>
References: <1140451760.998278.90430@g43g2000cwa.googlegroups.com>
Message-ID: <dtcqr8$jkh$1@apollon.grec.isp.9tel.net>

nuttydevil wrote:
> Hey everyone! I'm hoping someone will be able to help me, cause I
> haven't had success searching on the web so far... I have large chunks
> of text ( all in a long string) that are currently all in separate
> notebook files. I want to use python to read these strings of text,
> THREE CHARACTERS AT A TIME. (I'm studying the genetic code you see, so
> I need to read and analyse each sequence one codon at a time
> effectively.) Does anyone have any idea of how to do this using python?
> 
> 
> I'm going to be optimistic and thank you for your help in advance!
> Samantha.
> 
Since you're reading from files, the "read" operation of file-like 
objects takes an argument specifying the number of characters to read 
from the stream e.g.

 >>> f = file("stuff.txt")
 >>> f.read(3)
'car'
 >>> f.read(3)
'act'
 >>> f.read()
'erization'

Would that be enough for what you need?


From mensanator at aol.com  Thu Feb 23 16:22:00 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 23 Feb 2006 13:22:00 -0800
Subject: spaces at ends of filenames or directory names on Win32
References: <dtkuav$keb$1@solaris.cc.vt.edu>
Message-ID: <1140729720.048857.276990@u72g2000cwu.googlegroups.com>

rtilley wrote:
> # Spaces are present before and after the XXX
> filename = ' XXX '
>
> new_filename = filename.strip()
>
> if new_filename != filename:
>      print filename
>
> Macs allow these spaces in file and folder names. Which is OK. The
> problem arises when the file or folder is copied to a PC running Windows
> from a Mac. Windows allows the Mac to copy the file to it, but when
> Windows itself attempts to do anything with the file it strips the
> spaces and then tries to move it, copy it, etc and complains that the
> file isn't there!
>
> I can rectify this by striping the spaces from the files and folders on
> the Mac before they are copied to the PC or mounting the Windows share
> from the Mac and running a recursive strip program I wrote, but Windows
> will not allow the whitespace removal directly from within Windows....
> how annoying!
>
> For example... tell windows to move a file named ' XXX ' (one space
> before and one space after the filename). Windows will complain that
> file 'XXX' does not exist. It's correct of course, 'XXX' does not exist,
> but ' XXX ' does indeed exist.
>
> Can anyone rescue me from this madness :(

Use quatation marks.

>copy tt1.txt " XXX "
        1 file(s) copied.

>dir XXX
 Volume in drive C is XXXXPXXABA
 Volume Serial Number is 90C0-740E

 Directory of C:\Documents and Settings\Desktop

File Not Found

>dir " XXX
 Volume in drive C is XXXXPXXABA
 Volume Serial Number is 90C0-740E

 Directory of C:\Documents and Settings\Desktop

02/06/2006  07:05p                  10  XXX
               1 File(s)             10 bytes
               0 Dir(s)   2,063,822,848 bytes free

>dir *.
 Volume in drive C is XXXXPXXABA
 Volume Serial Number is 90C0-740E

 Directory of C:\Documents and Settings\Desktop

02/23/2006  03:20p      <DIR>          .
02/23/2006  03:20p      <DIR>          ..
02/06/2006  07:05p                  10  XXX
01/20/2006  04:53p      <DIR>          AGMP
01/20/2006  04:53p      <DIR>          BPWR Fe-Mn
01/20/2006  04:53p      <DIR>          GM
01/20/2006  04:53p      <DIR>          IDEM response
01/20/2006  04:53p      <DIR>          msgs
01/20/2006  04:53p      <DIR>          New Folder
02/08/2006  05:29p      <DIR>          New Folder (2)
01/20/2006  04:53p      <DIR>          OCAML
01/20/2006  04:53p      <DIR>          review05
01/20/2006  04:53p      <DIR>          scanned docs
02/17/2006  03:07p      <DIR>          USS repository
               1 File(s)             10 bytes
              13 Dir(s)   2,063,822,848 bytes free

Note that the trailing quote isn't always necessary.
Note from the last listing that the  XXX  file is indented one space.

> 
> Many Thanks,
> Brad



From fidlee at gmail.com  Thu Feb 23 12:09:43 2006
From: fidlee at gmail.com (fidlee at gmail.com)
Date: 23 Feb 2006 09:09:43 -0800
Subject: need help regarding compilation
Message-ID: <1140714583.014871.194640@p10g2000cwp.googlegroups.com>

i am new to learning jython...


i just tried compiling a small piece of code that is given below:

def fac(x)
 if x<=1:return 1
 return x*fac(x-1)

on

C:\Program Files\jython\temp>jythonc factor.py

it showed the following error:

processing factor
Traceback (innermost last):
  File "C:\Program Files\jython\Tools\jythonc\jythonc.py", line 5, in ?
  File "C:\Program Files\jython\Tools\jythonc\main.py", line 298, in
main
  File "C:\Program Files\jython\Tools\jythonc\main.py", line 219, in
doCompile
  File "C:\Program Files\jython\Tools\jythonc\compile.py", line 195, in
compilef
ile
  File "C:\Program Files\jython\Tools\jythonc\compile.py", line 209, in
compile
  File "C:\Program Files\jython\Tools\jythonc\SrcGenCompiler.py", line
1079, in
execstring
  File "<string>", line 1
        def fac(x)
                  ^
SyntaxError: invalid syntax





What may have gone wrong?
I am totally clueless as it is not mentioned in any of the books that I
tried.



From nick at craig-wood.com  Tue Feb 21 07:30:04 2006
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 21 Feb 2006 06:30:04 -0600
Subject: Pyserial never read
References: <1140105936.408387.88130@z14g2000cwz.googlegroups.com>
	<1140219414.143448.234450@z14g2000cwz.googlegroups.com>
	<1140302110.028540.176210@g43g2000cwa.googlegroups.com>
Message-ID: <slrndvm0sr.6k1.nick@irishsea.home.craig-wood.com>

luca72 <lucaberto at libero.it> wrote:
>  Thanks for your help, but it don't solve the problem.
>  I receive only the echo and full stop.

Try swapping pins 2 and 3 in the lead.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From jack at performancedrivers.com  Thu Feb  9 14:11:24 2006
From: jack at performancedrivers.com (Jack Diederich)
Date: Thu, 9 Feb 2006 14:11:24 -0500
Subject: Pulling all n-sized combinations from a list
In-Reply-To: <1139509392.890581.94470@g43g2000cwa.googlegroups.com>
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>
	<mailman.1668.1139501162.27775.python-list@python.org>
	<1139509392.890581.94470@g43g2000cwa.googlegroups.com>
Message-ID: <20060209191124.GE5942@performancedrivers.com>

On Thu, Feb 09, 2006 at 10:23:12AM -0800, mensanator at aol.com wrote:
> Jack Diederich wrote:
> > On Wed, Feb 08, 2006 at 12:50:19PM -0800, Swroteb wrote:
> > > Hi there,
> > >
> > > I've got a reasonably sized list of objects that I'd like to pull out
> > > all combinations of five elements from.  Right now I have a way to do
> > > this that's quite slow, but manageable.  I know there must be a better
> > > way to do this, but I'm not sure what it is.  Here's what I've got so
> > > far:
> > >
> >
> > import probstat # http://probstat.sourceforge.net
> > for (a, b, c) in probstat.Combination(range(9), 3): # 0..9, pick 3
> >   print a, b, c
> >
> > It is a C extension that does permutations & combinations and is
> > about 10x faster than doing it in pure python [I'm the author].
> > It is also the 3rd result for "python combination" and 5th for
> > "python permutaiton" but every month someone posts to c.l.py asking
> > for something similar.  Go figure.
> 
> Did you ever figure that some people use Windows?

I don't have a windows dev box so I can't vouch for this binary but
a user sent me a windows .pyd yesterday.

http://jackdied.com/static/probstat.pyd

-jackdied


From claird at lairds.us  Tue Feb 14 14:08:02 2006
From: claird at lairds.us (Cameron Laird)
Date: Tue, 14 Feb 2006 19:08:02 GMT
Subject: Python advocacy in scientific computation
References: <1139937227.379829.215090@z14g2000cwz.googlegroups.com>
Message-ID: <bul9c3-uls.ln1@lairds.us>

In article <1139937227.379829.215090 at z14g2000cwz.googlegroups.com>,
Michael Tobis <mtobis at gmail.com> wrote:
			.
			.
			.
>Among the Python components and Python bindings of special interest to
>scientists are the elegant and powerful matplotlib plotting package,
>which began by emulating and now surpasses the plotting features of
>Matlab, SWIG, which allows for runtime interoperability with various
>languages, f2py which specifically interoperates with Fortran, NetCDF
>libraries (which cope with NetCDF files with dramatically less fuss
>than the standard C or Fortran bindings), statistics packages including
>bindings to the R language,  linear algebra packages,  various
>platform-specific and portable GUI libraries, genetic algorithms,
>optimization libraries, and bindings for high performance differential
>equation solvers (notably, using the Argonne National Laboratory
>package PetSC). An especially interesting Python trick for runtime
>visualization in models that were not designed to support it, pioneered
>by David Beazley's SWILL, embeds a web server in your model code.
>
>See especially http://starship.python.net/~hinsen/ScientificPython/ and
>http://scipy.org as good starting points to learn about scientific uses
>of Python.
>
>mt
>

Lovely; putting a copy here is a great service to others.

I want a few subtle changes.  I applaud the slogan about how Python
encompasses the best of Matlab and Java (among others); I like to
think that'll get through.  In that vicinity would be a good place,
if practical, to work in mention that:
A.  Python is *excellent* for long-lasting and/or
    group work;
B.  Python's licensing is friendly;
C.  It's a real language, and therefore generalizes
    far better than Matlab; and
D.  Has an unrivaled span of practicality, so that 
    learning it enables a researcher to tackle a 
    wide variety of software taskes.
You touch on these matters, but I think that section might be pro-
pitious for promoting them, perhaps along with
E.  Python's ease-of-learning and successful record
    in the hands of children, scientists, and other
    casual practitioners.

Also, my instinct is to underline that this stuff is REAL.  David
Beazley was winning awards with his scientific Python-Fortran
marriage back in the '90s.  Perhaps your audience doesn't need so
much convincing on that point ...


From deets at nospam.web.de  Sun Feb  5 12:24:05 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 05 Feb 2006 18:24:05 +0100
Subject: how to kill a python process?
In-Reply-To: <1139159404.912421.251960@g43g2000cwa.googlegroups.com>
References: <1139159404.912421.251960@g43g2000cwa.googlegroups.com>
Message-ID: <44mqlkF2ugrgU2@uni-berlin.de>

MackS schrieb:
> Hello!
> 
> This question does not concern programming in python, but how to manage
> python processes. Is there a way to "name" a python process? At least
> on Linux, if I have two python programs running, they both run under
> the name "python"
> 
> #pidof program1.py
> [empty line]
> #pidof program1.py
> [empty line]
> # pidof python
> 1249 854
> 
> Is there a way to make them run under their own names, e.g., to make it
> easier to kill them by name using killall? Or am I stuck with
> registering the pid of each python process I create and then refer to
> that list whenever I need to selectively stop one of them? The latter
> makes managing a long list of processes very cumbersome...

Yes, you are. I'm not sure how to rename processes - but _if_ it kan be 
done, it means that somebody else could maybe do it, too - and in case 
of the same name is accidentially killed.

So - stick with the PID- After all, it is not _so_ cumbersome to keep a 
reference to e.g. popen-objects.

Diez


From martin.witte at gmail.com  Fri Feb 24 10:50:34 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 24 Feb 2006 07:50:34 -0800
Subject: chrtohex
In-Reply-To: <1140794594.653270.242720@e56g2000cwe.googlegroups.com>
References: <1140794594.653270.242720@e56g2000cwe.googlegroups.com>
Message-ID: <1140796234.325774.53020@t39g2000cwt.googlegroups.com>

Or:
py> print hex(ord('a'))
0x61
py> print int(ord('a'))
97



From daniel at dittmar.net  Sat Feb 25 08:49:42 2006
From: daniel at dittmar.net (Daniel Dittmar)
Date: Sat, 25 Feb 2006 14:49:42 +0100
Subject: Module written in C does not repond to Ctrl-C interruption.
In-Reply-To: <dto7oo$48g$1@joe.rice.edu>
References: <dtnak6$aku$1@joe.rice.edu> <468qvoF9r91vU1@uni-berlin.de>
	<dtngoc$6og$1@news.sap-ag.de> <dto7oo$48g$1@joe.rice.edu>
Message-ID: <46b5jlFa9k49U1@uni-berlin.de>

Bo Peng wrote:
> Daniel Dittmar wrote:
> 
>>
>> You could set up your own signal handler when entering the C 
>> extension. This should abort the extension (tricky) and call the 
>> Python signal handler.
> 
> 
> This can be done under linux using things in signal.h but I am not
> sure whether or not there is a portable way to do it (max, win32).
> Does anybody know a quick way under windows?


SetConsoleCtrlHandler:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/setconsolectrlhandler.asp

Daniel


From claudio.grondi at freenet.de  Sun Feb 19 19:31:47 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Mon, 20 Feb 2006 01:31:47 +0100
Subject: SPE IDE videos and more...
In-Reply-To: <mailman.2140.1140392699.27775.python-announce-list@python.org>
References: <mailman.2140.1140392699.27775.python-announce-list@python.org>
Message-ID: <43F90DF3.2070508@freenet.de>

spe.stani.be at gmail.com wrote:
> I'm happy to spread the word about showmedo.com, an excellent
> collection of python programming videos.
> 
>>From the website
> http://showmedo.com/videoListPage?listKey=TheBigPythonList:

The server response under:

   http://showmedo.com/videoListPage?listKey=TheBigPythonList:

was:
"""
500 Internal error
Server got itself in trouble
____________________________
Powered by Cherrypy 2.1.0
"""

If there is not enough trouble around to suffer from, why not get itself 
in trouble? ;-)

As the computer becomes more and more human like, even able to get 
itself in trouble, the fact that it has the courage to admit the true 
reason for the trouble emerges it as a stupid machine.

:-))

By the way: it was _me_ who caused the server to be in trouble feeding 
it with a bad URL instead of the right one:

   http://showmedo.com/videoListPage?listKey=TheBigPythonList

Sometimes it is good, that there is no human on the other end of the 
line knowing about all this dirty words which can be thrown back as 
excuse for own malfunction ...

Claudio


From kent at kentsjohnson.com  Wed Feb 22 06:07:35 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Wed, 22 Feb 2006 06:07:35 -0500
Subject: May i customize basic operator (such as 1==3)?
In-Reply-To: <mailman.2296.1140604574.27775.python-list@python.org>
References: <dtgpbb$asm$2@sea.gmane.org>	<BAY108-F85E0B9B4C44B7CAA16D68CDFD0@phx.gbl>	<dthd01$7t8$1@sea.gmane.org>
	<mailman.2296.1140604574.27775.python-list@python.org>
Message-ID: <43fc4174_2@newspeer2.tds.net>

Thomas Heller wrote:

> The standard unittest module can do this also:  replace
> calls to failUnless(a == b) with failUnlessEqual(a, b).

or assertEquals(a, b)


From eoinrogers at gmail.com  Fri Feb 17 14:15:09 2006
From: eoinrogers at gmail.com (Byte)
Date: 17 Feb 2006 11:15:09 -0800
Subject: Another stupid newbie question
Message-ID: <1140203709.145048.314180@g43g2000cwa.googlegroups.com>

How can I make the following code:

from random import random



def stuff(a, mx):
    x = 2
    while x == 2:
        x = random()
        if x == mx: print x
        else: print 'No luck,', x
        x = 2

Stop when x == mx?

Thanks in advance,
 -- /usr/bin/byte



From rridge at csclub.uwaterloo.ca  Sat Feb 11 10:47:20 2006
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 11 Feb 2006 07:47:20 -0800
Subject: Legality of using Fonts
In-Reply-To: <pan.2006.02.11.10.08.43.753266@REMOVETHIScyber.com.au>
References: <1139591308.864757.154740@g44g2000cwa.googlegroups.com>
	<pan.2006.02.10.23.30.05.619934@REMOVETHIScyber.com.au>
	<1139631874.397548.37840@g47g2000cwa.googlegroups.com>
	<pan.2006.02.11.10.08.43.753266@REMOVETHIScyber.com.au>
Message-ID: <1139672839.948356.287330@g14g2000cwa.googlegroups.com>


Steven D'Aprano wrote:
> In any case, even in the USA, hinted fonts are copyrightable, and merely
> removing the hints (say, by converting to a bitmap) is no more legal than
> whiting out the author's name from a book and claiming it as your own.

That's an absurd comparison. By making a bitmap font from an hinted
outline font you're only copying the typeface, you're not copying the
hints, the computer program, that's the only part of the font that's
subject copyright.  If a book consisted of two parts, the first a play
by Shakespeare, and the second a commentary of that play, and someone
copied only the first part, they'd be doing nothing illegal.


     Ross Ridge



From email at christoph-haas.de  Mon Feb 20 11:33:08 2006
From: email at christoph-haas.de (Christoph Haas)
Date: Mon, 20 Feb 2006 17:33:08 +0100
Subject: Open Relay Test
In-Reply-To: <1140150719.298606.9710@g44g2000cwa.googlegroups.com>
References: <1140150719.298606.9710@g44g2000cwa.googlegroups.com>
Message-ID: <200602201733.08339.email@christoph-haas.de>

On Friday 17 February 2006 05:31, D wrote:
> Hi all .. how could one test to see if an open relay exists on a
> specific email server?

My simple favorite... run:

	telnet relay-test.mail-abuse.org

from the mail server in question (and be patient).

Kindly
 Christoph
-- 
~
~
".signature" [Modified] 1 line --100%--                1,48         All


From harlinseritt at yahoo.com  Tue Feb  7 07:51:32 2006
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 7 Feb 2006 04:51:32 -0800
Subject: Tkinter: is there a has_focus method or property for a window?
Message-ID: <1139316692.742854.303420@g47g2000cwa.googlegroups.com>

I have two windows. One is a main config window. The other is an 'Add
Setting' window. Both are using two different classes.

Once the Add Setting button is clicked on the Add Setting window, the
setting is written to file. At that time the main config window should
update its setting listing but it doesn't because it doesn't know it
should.

I do notice that when the Add Setting window closes, the focus goes
right back to the main config window. Is there a "has focus" event that
can trigger a command for this window?

Also, if there is another way to get this done, I am open to
suggestions.

Thanks,

Harlin Seritt



From jure at codeshift.net  Thu Feb 23 18:39:42 2006
From: jure at codeshift.net (Jure Vrscaj)
Date: Fri, 24 Feb 2006 00:39:42 +0100
Subject: remote module importing (urlimport)
Message-ID: <43FE47BE.4090609@codeshift.net>

Hi,

as title implies, I wrote a simple module that allows importing modules 
or even packages via http, conceptually similar to zipimport (of which I 
learned about during the process of writing urlimport, and found it very 
useful).

The module is fresh new as it was written today, and tested only on a 
few packages (moinmoin wiki and twisted).

The motives: well, I kinda like the idea of having python modules 
available in an instant everywhere python and internet is, no pre-usage 
download required, especially when you need modules from different 
versions of python. Besides, I hope this will be a valid faculty project 
that I have to do. :)

This module is heavily based on specification and examples from PEP 302.

It can be found at: http://urlimport.codeshift.net/

Comments are welcome :)

Long live python.

regards,
Jure



From abkhd at earth.co.jp  Wed Feb 22 23:37:49 2006
From: abkhd at earth.co.jp (A.B., Khalid)
Date: 22 Feb 2006 20:37:49 -0800
Subject: With pyMinGW
References: <1140565378.921287.177380@g44g2000cwa.googlegroups.com>
	<1140609645.670997.49670@g44g2000cwa.googlegroups.com>
	<1140618122.150419.133470@o13g2000cwo.googlegroups.com>
Message-ID: <1140669469.495997.59840@z14g2000cwz.googlegroups.com>

bearophileHUGS at lycos.com wrote:
> Thank you for your answers, Khalid.
>
> > It seems you may be using an old version of pyMinGW,
>
> I have downloaded it yesterday from your site.
>
>
> > the relevant part dealing with include directories in zlib.mak
> > should read now as follows:
>
> I have checked, and that relevant part is the same in my zlib.mak.
>
>
> > but since the site stopped the hosting of zip files and since many
> > people do not download that particular file anyway when it was hosted
> > elsewhere, letting the file expire (inactive files are removed after
> > one week from last download), then I hope you'd agree it would be much
> > work for me to keep track of expired and unexpired files and so keep on
> > uploading the files.
>
> You can probably remove the dead link from your page.
> (Maybe I can build a complete package (with Tkinter, minGW and Swig
> too), and put it in some official Python site.)
>
>
> > As to your SWIG problem, then I suggest you look into the pyMinGW's
> > extensions' directory. There you will find two examples of building C
> > and CPP extensions using SWIG and MinGW.
>
> I don't want to use/waste too much of your time, I have succed with the
> C++ example, but the C example has given me some problems:
>
> C:\...\PyminGW\Python-2.4.2\MinGW\Extensions\pyExt_C_exmaple>python24
> setupMingW.py build --compile
> r=mingw32
> running build
> running build_ext
> building '_example' extension
> swigging example.i to example_wrap.c
> C:\...\PyminGW\swigwin-1.3.28\swig.exe -python -o example_wrap.c
> example.i
> C:\......\bin\gcc.exe -mno-cygwin -mdll -O2 -Wall -s
> -IC:\...\PyminGW\Python-2.4
> .2\include -IC:\...\PyminGW\Python-2.4.2\PC -c example_wrap.c -o
> build\temp.win32-2.4\Release\examp
> le_wrap.o
> example_wrap.c: In function `PySwigClientData_New':
> example_wrap.c:1205: warning: dereferencing type-punned pointer will
> break strict-aliasing rules
> example_wrap.c: In function `PySwigObject_own':
> example_wrap.c:1456: warning: dereferencing type-punned pointer will
> break strict-aliasing rules
> example_wrap.c:1456: warning: dereferencing type-punned pointer will
> break strict-aliasing rules
> example_wrap.c: In function `My_variable_set':
> example_wrap.c:2515: error: `My_variable' undeclared (first use in this
> function)
>
> Bye,
> bearophile


You are using the C example extension found in pyMinGW, right? It
builds fine here, of course using the "python setup.py build" command.

$ python setupMinGW.py build
running build
running build_ext
building '_example' extension
swigging example.i to example_wrap.c
d:\MISC\PROGRAMS\SWIG-1.3.21\swig.exe -python -o example_wrap.c
example.i
creating build
creating build\temp.win32-2.4
creating build\temp.win32-2.4\Release
e:\UTILIT~1\PROGRA~1\MINGW\BIN\gcc.exe -mno-cygwin -mdll -O2 -Wall -s
-IG:\PROJS\PY24\PYTHON\DIST\SRC\include
-IG:\PROJS\PY24\PYTHON\DIST\SRC\PC -c example_wrap.c -o
build\temp.win32-2.4\Release\example_wrap.o
example_wrap.c:187: warning: 'SWIG_Python_TypeDynamicCast' defined but
not used
example_wrap.c:199: warning: 'SWIG_Python_TypeName' defined but not
used
example_wrap.c:205: warning: 'SWIG_Python_TypeQuery' defined but not
used
example_wrap.c:551: warning: 'SWIG_Python_MustGetPtr' defined but not
used
example_wrap.c:559: warning: 'SWIG_Python_ConvertPacked' defined but
not used
e:\UTILIT~1\PROGRA~1\MINGW\BIN\gcc.exe -mno-cygwin -mdll -O2 -Wall -s
-IG:\PROJS\PY24\PYTHON\DIST\SRC\include
-IG:\PROJS\PY24\PYTHON\DIST\SRC\PC -c example.c -o
build\temp.win32-2.4\Release\example.o
writing build\temp.win32-2.4\Release\_example.def
creating build\lib.win32-2.4
e:\UTILIT~1\PROGRA~1\MINGW\BIN\gcc.exe -mno-cygwin -shared -s
build\temp.win32-2.4\Release\example_wrap.o
build\temp.win32-2.4\Release\example.o
build\temp.win32-2.4\Release\_example.def
-LG:\PROJS\PY24\PYTHON\DIST\SRC\libs
-LG:\PROJS\PY24\PYTHON\DIST\SRC\PCBuild -lpython24 -o
build\lib.win32-2.4\_example.pyd

And copying that _example.pyd from the build directory just created to
our current directory so that python can see it, we can load that
extension fine as well:

$ python -i
Python 2.4.2 (#67, Nov  8 2005, 10:12:11)
[GCC 3.4.2 (mingw-special)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import example as ex
>>> dir(ex)
['__builtins__', '__doc__', '__file__', '__name__', '_example',
'_newclass', '_object', '_swig_getattr', '_swig_setattr', 'cvar',
'fact', 'fib', 'get_time', 'hello', 'my_mod']
>>> ex.hello()
'Hi there!'
>>> ex.fact(4)
24
>>> 


Regards,
Khalid



From kens7601 at gmail.com  Tue Feb 14 19:54:04 2006
From: kens7601 at gmail.com (Ken Stevens)
Date: Tue, 14 Feb 2006 19:54:04 -0500
Subject: Newbie
In-Reply-To: <1139963955.22163.6.camel@kenshin>
References: <v3JHf.2731$lo3.2501@trnddc07>	<43ef6433$0$25387$636a55ce@news.free.fr>
	<HZJHf.2737$lo3.1139@trnddc07>	<1139806792.698674.168530@g44g2000cwa.googlegroups.com>	<PCuIf.32401$lo3.15259@trnddc07>
	<1139963955.22163.6.camel@kenshin>
Message-ID: <43F27BAC.2060606@gmail.com>

Felipe Almeida Lessa wrote:

>Em Qua, 2006-02-15 ?s 00:30 +0000, LittlePython escreveu:
>  
>
>>I really do not wish to limit myself to MS. My bread and butter is MS but I
>>am a BSD fan at heart. I wanted to learn something I can use in both.
>>    
>>
>
>Please start by not top-posting ;-). Also, see
>http://www.mono-project.com/VisualBasic.NET_support .
>
>  
>
Sigh! This has been bothering me for some time. I tend to bottom post 
primarily because people here are so anal about it.

In any case, I actually prefer top posting. Reading the New message 
first is better (because I get lot of mail). If I need to be reminded of 
context I can always scan down. It makes much more sense to me.

Some people or group of people decided bottom posting was better and it 
MUST be that way. To me that even goes against one of the main 
philosophies of Linux which is that of choice. So, to any who think, 
otherwise... there is absolutely NOTHING wrong or incorrect about TOP 
posting. OK, rant mode off. I feel better now! I got that off my chest!

Ken



From shearichard at gmail.com  Sat Feb 25 21:34:10 2006
From: shearichard at gmail.com (shearichard at gmail.com)
Date: 25 Feb 2006 18:34:10 -0800
Subject: How to Mount/Unmount Drives on Windows?
In-Reply-To: <1140919575.691402.70970@i40g2000cwc.googlegroups.com>
References: <1140919575.691402.70970@i40g2000cwc.googlegroups.com>
Message-ID: <1140921250.346129.28500@i39g2000cwa.googlegroups.com>

This looks like it might help you ...

http://support.microsoft.com/?kbid=311272

...  although the blurb does say "DevCon is not redistributable. It is
provided for use as a debugging and development tool".

There is an article about it at ...

http://tinyurl.com/4kb8m

regards

richard.



From iddw at hotmail.com  Mon Feb 13 18:55:37 2006
From: iddw at hotmail.com (Dave Hansen)
Date: Mon, 13 Feb 2006 17:55:37 -0600
Subject: invert the order of a string
References: <dsr600$9sj$1@solaris.cc.vt.edu>
Message-ID: <6272v111vee95606gd7fucjdqmec8uhc7e@4ax.com>

On Mon, 13 Feb 2006 18:51:11 +0000 in comp.lang.python, rtilley
<rtilley at vt.edu> wrote:

>s = list('some_random_string')
>print s
>s.reverse()
>print s
>s = ''.join(s)
>print s
>
>Surely there's a better way to do this, right?

How about 

s = "some random string"
print s
s = s[::-1]
print s

HTH,
   -=Dave
                                        -=Dave

-- 
Change is inevitable, progress is not.


From paullanier at gmail.com  Tue Feb 28 18:54:06 2006
From: paullanier at gmail.com (paullanier at gmail.com)
Date: 28 Feb 2006 15:54:06 -0800
Subject: Use empty string for self
Message-ID: <1141170846.619246.163470@t39g2000cwt.googlegroups.com>

It seems that lots of people don't like having to prefix self. in front
of instance variables when writing methods in Python.  Of course,
whenever someone suggests doing away with 'self' many people point to
the scoping advantages that self brings.  But I hadn't seen this
proposal when I searched so I thought I'd throw it out there.  Maybe
it's already been thrown out but I like it.

The issue I have with self. is that is makes the code larger and more
complicated than it needs to be.  Especially in math expressions like:
self.position[0] = self.startx + len(self.bitlist) * self.bitwidth

It really makes the code harder to read.  On the other hand,
eliminating the self. would create other issues including readability
with regards to which vars are instance vars and which come from
somewhere else.

But what if we keep the '.' and leave out the self.  Then the example
looks like:
.position[0] = .startx + len(.bitlist) * .bitwidth

The 'self' is implied but the scoping rules don't change and it's still
clear when reading it that they are instance variables.  We can keep
the self in the method header (or not) but that is really a separate
issue.

Any comments?  Has this been discussed before?



From lepto.python at gmail.com  Tue Feb 14 01:26:51 2006
From: lepto.python at gmail.com (oyster)
Date: Tue, 14 Feb 2006 14:26:51 +0800
Subject: any lib to generatre treemap?
Message-ID: <6a4f17690602132226iad48f72q@mail.gmail.com>

I want to visualize my disk space like
http://www.werkema.com/img/scrnshot/spacemonger.gif. ie. draw the directory
as a big rectangle and its size is proportionable to the file size under
this directory, then draw and fill small rectangles into it to behalf the
size of every files. Is there a lib/src to do so?
Or more generally, any lib to draw a list of list
[code]
this is a list of list
[
    [dir1, files1],
 ......
    [dirN, filesN],
]
[/code]
to a treemap?

thanx
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From neuzhoundxx at yahoo.com  Mon Feb 13 16:27:22 2006
From: neuzhoundxx at yahoo.com (john peter)
Date: Mon, 13 Feb 2006 13:27:22 -0800 (PST)
Subject: how to use RotatingFileHandler
Message-ID: <20060213212722.92234.qmail@web36701.mail.mud.yahoo.com>

Hi!
   
  I have the following logging.conf :
  [loggers]
keys=root
   
  [handlers]
keys=roth
   
  [formatters]
keys=simpleFormatter
   
  [logger_root]
level=INFO
handlers=roth
   
  [handler_roth]
class=RotatingFileHandler
level=INFO
formatter=simpleFormatter
args=('adssim.log','w', 200, 4)
   
  [formatter_simpleFormatter]
format=%(asctime)s - %(message)s
datefmt=
   
  and sampleLogging.py script:
    import logging
  import logging.config
  logging.config.fileConfig("logging.conf")
  logger = logging.getLogger("root")
  for i in xrange(0, 5000):
  logger.debug("debug message %s" % i)
  logger.info("info message %s" % i)
  logger.warn("warn message %s" % i)
  logger.error("error message %s" % i)
  logger.critical("critical message %s" % i)
   
  for some reason, i keep getting the following error message:
  C:\adssim1>python sampleLogging.py
Traceback (most recent call last):
  File "C:\Python24\lib\logging\config.py", line 157, in fileConfig
    log.addHandler(handlers[hand])
KeyError: 'roth'
No handlers could be found for logger "root"
   
  when i did a help(logging) on the logging module, i don't see RotatingFileHandler.
  Could somebody please help? Thanks!


		
---------------------------------
 
 What are the most popular cars? Find out at Yahoo! Autos 
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From tjreedy at udel.edu  Sat Feb  4 03:22:39 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 4 Feb 2006 03:22:39 -0500
Subject: Recursive function going infinite and I can't see why.
References: <312cfe2b0602032318i3fcb075di31406adefd1bbe@mail.gmail.com>
Message-ID: <ds1o8r$d5v$1@sea.gmane.org>

>Would anyone be able to tell me why my function below is getting stuck
>in infinite recusion?

>def replace_within_node(node,oldnode,newnode):
>    if node is oldnode:
>        return newnode

Without looking further, the most likely reason is that the base case is 
never true: ie, node is never oldnode.  I would probably add
  print node, oldnode, newnode
at the top (and maybe another print later) and then run the code on a small 
tree where I thought I knew what should be printed and then see where my 
expectation diverges from the actual.

Terry Jan Reedy







From kak at purdue.edu  Mon Feb 13 14:13:18 2006
From: kak at purdue.edu (Avi Kak)
Date: Mon, 13 Feb 2006 14:13:18 -0500
Subject: trapping errors in function call syntax
Message-ID: <m8m1v1h8ae545nsqbl777plviddc94vsdd@4ax.com>


Hello:

   Suppose I write a function that I want to be called
   with ONLY keyword argumnts, how do I raise an
  exception should the function get called with 
  what look like position-specfic arguments?

  Any help would be appreciated.

Avi Kak



From onurb at xiludom.gro  Fri Feb 10 07:31:46 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Fri, 10 Feb 2006 13:31:46 +0100
Subject: Too Many if Statements?
In-Reply-To: <1139517959.741090.28560@g14g2000cwa.googlegroups.com>
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<6e2iu1hdb8fvlfkcuulloiiq1khlbhret1@4ax.com>
	<1139517959.741090.28560@g14g2000cwa.googlegroups.com>
Message-ID: <43ec87cc$0$7212$626a54ce@news.free.fr>

slogging_away wrote:
> It appears it may not be a 'if' statment limitation at all.  This is
> because I added another 800 element array 

Looks like a memory problem then...

> in which to store the various
> error messages generated when a configuration file error is deteceted
> based on their severity level. 

Why storing error messages ? Why don't you just write'em out (be it to
stdout or to a file) ?

(snip)

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From steve at REMOVETHIScyber.com.au  Wed Feb 22 06:36:50 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Wed, 22 Feb 2006 22:36:50 +1100
Subject: No
References: <1140534490.873612.64280@g47g2000cwa.googlegroups.com>
	<1140544942.394795.240520@g47g2000cwa.googlegroups.com>
	<mailman.2253.1140545818.27775.python-list@python.org>
	<1140551897.304048.47440@f14g2000cwb.googlegroups.com>
	<mailman.2297.1140604955.27775.python-list@python.org>
Message-ID: <pan.2006.02.22.11.36.50.194956@REMOVETHIScyber.com.au>

On Wed, 22 Feb 2006 11:42:19 +0100, Fredrik Lundh wrote:

> Gaz wrote:
> 
>> Aye, but the file is in MY drive, not the server. Perhaps  thats the
>> issue? I bet it's so... how should i deal with it? Perhaps should be a
>> script that uploads the files to the server and then emails it...
> 
> assuming that the web server can read files on your local disk is perhaps
> a bit too optimistic.

Come on, Gaz is running Windows. Chances are *everyone* can read files on
his local disk.

*wink*


-- 
Steven.



From eric.nieuwland at xs4all.nl  Wed Feb  1 11:46:08 2006
From: eric.nieuwland at xs4all.nl (Eric Nieuwland)
Date: Wed, 1 Feb 2006 17:46:08 +0100
Subject: urllib2 - My POST Request just isn't working right
In-Reply-To: <312cfe2b0602010834i5abdd0e5x2b7659658685b8ab@mail.gmail.com>
References: <312cfe2b0602010753uc363a85wb3f87cf2677993a2@mail.gmail.com>
	<mailman.1317.1138810288.27775.python-list@python.org>
	<1138810726.547315.82890@f14g2000cwb.googlegroups.com>
	<312cfe2b0602010833j29f59563i90e62145e6829d33@mail.gmail.com>
	<312cfe2b0602010834i5abdd0e5x2b7659658685b8ab@mail.gmail.com>
Message-ID: <7b945fc3783febb3d9cf30a575659d48@xs4all.nl>

Don't forget to substitute the actual Content-length for %d!

--eric

On 1 feb 2006, at 17:34, Gregory Pi?ero wrote:

> Correction:
> ----------------------------------------------------------------------- 
> --
> POST /GatewayDC HTTP/1.0
> Referer: YourCompanyNameGoesHere
> Host: SSLserver.fedex.com
> Accept: image/gif, image/jpeg, image/pjpeg, text/plain, text/html, */*
> Content-Type: image/gif
> Content-length: %d
>
> Your FedEx Transaction
> ----------------------------------------------------------------------- 
> --
> -- 
> http://mail.python.org/mailman/listinfo/python-list
>



From carsten at uniqsys.com  Mon Feb 13 16:10:46 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 13 Feb 2006 16:10:46 -0500
Subject: cyclic data structures
In-Reply-To: <fu6If.1607$No6.37915@news.tufts.edu>
References: <Nc6If.1604$No6.38177@news.tufts.edu>
	<mailman.1858.1139863851.27775.python-list@python.org>
	<fu6If.1607$No6.37915@news.tufts.edu>
Message-ID: <1139865046.11014.73.camel@dot.uniqsys.com>

On Mon, 2006-02-13 at 16:03, John Salerno wrote:
> Peter Decker wrote:
> 
> > 'L' is a pointer to a list. You are now adding that pointer to the
> > very list it points to.
> 
> I understand that, but I guess I just don't see how this creates 
> anything other than a list that refers to [1, 2], and then refers again 
> to [1, 2], to create [1, 2, [1, 2]].
> 
> L.append(L) basically creates this, I think:
> 
> [1, 2, L]
> 
> Now, assuming that's correct, and since L points to the list [1, 2], why 
> can't '[1, 2]' be substituted for the 'L' and then the list is closed?

L is [1,2] before the append. After the append, L is [1,2,L], which is
[1,2,[1,2,L]], which is [1,2,[1,2,[1,2,L]]] etc into infinity. L
literally contains itself after the append.

HTH,

Carsten.



From ajsiegel at optonline.net  Mon Feb  6 21:55:22 2006
From: ajsiegel at optonline.net (Arthur)
Date: Mon, 06 Feb 2006 21:55:22 -0500
Subject: readline tokenizer newline sticky wicket
Message-ID: <43E80C1A.2060105@optonline.com>

Given a "linemess.py" file with inconsistent line ending:

line 1 \r
\r\n
line \n

tokenized as per:

import tokenize
f=open('linemess.py','r')
tokens=tokenize.generate_tokens(f.readline)
for t in tokens:
    print t

get output as follows:

(1, 'line', (1, 0), (1, 4), 'line 1\r\n')
(2, '1', (1, 5), (1, 6), 'line 1\r\n')
(4, '\r\n', (1, 6), (1, 8), 'line 1\r\n')
(1, 'line', (2, 0), (2, 4), 'line 2\n')
(2, '2', (2, 5), (2, 6), 'line 2\n')
(4, '\n', (2, 6), (2, 7), 'line 2\n')
(0, u'', (3, 0), (3, 0), u'')

So that the Windows \r\n is tokenized as a single literal token rather 
than as \n under the convention of universal newline support.

Isn't this a problem? 

I think this must have been at the  route of the issue I ran into when a 
file of messy inconsistent line ending that nonetheless compiled and ran 
without a problem was rejected by tokenizer.py as  having an indent issue.

On the theory that if tokenizer needs to fail when crap is thrown at it, 
it should do so more gracefully - is this bug reportable?

Art






From johnjsal at NOSPAMgmail.com  Mon Feb 13 16:06:16 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 13 Feb 2006 21:06:16 GMT
Subject: simple math question
In-Reply-To: <ueh1v15ed6jq7527k2pihod4r68g1o69d0@4ax.com>
References: <RuWdnVmaD4Q23XPeRVn-tw@rcn.net>
	<JrSdnac_xMxYx3PenZ2dnUVZ_tmdnZ2d@rcn.net>
	<ueh1v15ed6jq7527k2pihod4r68g1o69d0@4ax.com>
Message-ID: <cx6If.1608$No6.37915@news.tufts.edu>

Dave Hansen wrote:

> Probably not the "wrong" way, just a different way, especially if you
> write C code.  

Oh, how poorly you know me! ;) I started learning C# a year ago, just 
for fun, but that's about all I know (aside from HTML and CSS). I did 
have a high school class in C++ a long, long time ago though.

Anyway, Python is my next venture, again just for fun. I guess my 
problem was like you said, I was used to truncating toward zero, not 
toward negative infinity. Knowing that that's how Python works fully 
explains my problem now.


From pdr14 at comcast.net  Tue Feb 14 11:42:38 2006
From: pdr14 at comcast.net (pdr14 at comcast.net)
Date: 14 Feb 2006 08:42:38 -0800
Subject: processing limitation in Python
Message-ID: <1139935358.128826.58660@g14g2000cwa.googlegroups.com>

If I un-comment any line in this program below the line where I
commented " all OK up to this point " This program locks up my
computer.

Windows task manager will show "Not Responding" for Python in the
Applications tab and in the Performance tabe the CPU usage will be
locked at %100.

I've experienced the same problem on 2 different computers, one running
2000 pro. the other running XP home eddition.  both computers run
Python 2.4.2

I'm just wondering if any one else has noticed any problems with
working with large numbers in Python ind if there is anything that can
work around this issue.

Thankd for reading
David

def factor(n):
    d = 2
    factors = [ ]
    while n > 1:
        if n % d == 0:
            factors.append(d)
            n = n/d
        else:
            d = d + 1
    print factors
factor (12)
factor (123)
factor (1234)
factor (12345)
factor (123456)
factor (1234567)
factor (12345678)
factor (123456789)
factor (1234567898)
factor (12345678987)
factor (123456789876)
factor (1234567898765)       # all OK up to this point
#factor (12345678987654)    # locks up computer if I run this line
#factor (123456789876543)
#factor (1234567898765432)
#factor (12345678987654321)



From nick.smallbone at gmail.com  Wed Feb 15 12:22:09 2006
From: nick.smallbone at gmail.com (Nick Smallbone)
Date: 15 Feb 2006 09:22:09 -0800
Subject: Clarity: GIL, processes and CPUs etc
References: <1140022815.751692.313990@g47g2000cwa.googlegroups.com>
Message-ID: <1140024129.256565.323120@g14g2000cwa.googlegroups.com>

adsheehan at eircom.net wrote:
> I have been reading many of the posting on the GIL and impact on
> threading etc.
> I have found is confusing and would welcome some clarity on this.
>
> I understand that embedding the interpreter in a C/C++ application
> limits it to one CPU.
> If the application is multi-threaded (system threads) in will not use
> additional CPUs as the interpreter is tied to one CPU courtesy of the
> GIL.
> True or False?
>

As I understand it, the interpreter needs the GIL held in order to run.
That means that you can only run Python code on one CPU at once, but
plain C/C++ code can be multithreaded.

> I understand that forking or running multiple process instances of the
> above application would make use of multiple CPUs. This is because each
> process would have its own interpreter and GIL that is independent of
> any other process.
> True or False?
>

I suppose it would, yes. But this is just like running multiple copies
of Python, in that you won't be able to use PyObject *s from one
instance in another directly, so the multiple processes would have to
communicate by sockets or IPC or some other way.



From grante at visi.com  Sat Feb 11 09:03:33 2006
From: grante at visi.com (Grant Edwards)
Date: Sat, 11 Feb 2006 14:03:33 -0000
Subject: Yet another GUI toolkit question...
References: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
	<m2d5huwof8.fsf@unique.fqdn>
	<43ED6990.1020707@wordtech-software.com>
	<1139651109.458106.239760@o13g2000cwo.googlegroups.com>
Message-ID: <11urrll9jrp1qbf@corp.supernews.com>

On 2006-02-11, dberlin at gmail.com <dberlin at gmail.com> wrote:

> What's wrong with wxPython? (http://www.wxpython.org)

Nothing.  A lot of us use it.

> Didn't see it mentioned here.

I'm sorry, I didn't realize we were supposed to.

You might want to check the wxpython mailing list if you want
to see it mentioned more often.

-- 
Grant Edwards                   grante             Yow!  Why are these
                                  at               athletic shoe salesmen
                               visi.com            following me??


From hancock at anansispaceworks.com  Tue Feb 21 14:16:58 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Tue, 21 Feb 2006 13:16:58 -0600
Subject: Multiple assignment and the expression on the right side
In-Reply-To: <dte84b$568$1@home.itg.ti.com>
References: <dte84b$568$1@home.itg.ti.com>
Message-ID: <20060221131658.6bbccfea@samwise.anansi>

On Tue, 21 Feb 2006 10:53:21 +0530
Suresh Jeevanandam <jm.suresh at gmail.com> wrote:
> 	I read in "Python in a Nutshell" that when we have
> 	multiple assignments 
> made on a single line, it is equivalent to have those many
> simple  assignments and that the right side is evaluated
> once for each  assignment. [The wordings are mine. I am
> not sure if this is what he  intended].

>  >>> c = d = e = x()

AFAIK, this is equivalent to this:

e = x()
d = e
c = d

So, in fact, what you say is true, but these, of course will
not evaluate x multiple times.

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From kraus at hagen-partner.de  Thu Feb 16 07:57:33 2006
From: kraus at hagen-partner.de (Wolfram Kraus)
Date: Thu, 16 Feb 2006 13:57:33 +0100
Subject: MySQL
In-Reply-To: <1140094071.287878.55580@f14g2000cwb.googlegroups.com>
References: <1140094071.287878.55580@f14g2000cwb.googlegroups.com>
Message-ID: <dt1sro$t0n$1@ork-un.noris.net>

rodmc wrote:
> I need to write a Python application which connects to a MySQL 5.0
> database. Can anyone point me in the right direction or a compatible
> library?
> 
> Best,
> 
> rod
> 

See http://sourceforge.net/projects/mysql-python


HTH,
Wolfram


From lycka at carmen.se  Sun Feb  5 16:52:05 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Sun, 05 Feb 2006 22:52:05 +0100
Subject: Importing a class, please help...
In-Reply-To: <slrnducdnv.2t1.grahn+nntp@frailea.sa.invalid>
References: <a1pFf.138$CO7.124@fe02.lga>
	<ds588l$aii$1@aphrodite.grec.isp.9tel.net>
	<slrnducdnv.2t1.grahn+nntp@frailea.sa.invalid>
Message-ID: <ds5s25$svs$1@wake.carmen.se>

Jorgen Grahn wrote:
>>Yeah, the definition of "JAR" is Java ARchive, why the hell would a 
>>Python script be able to read a JAR in the first place
> 
> You are rude to an obvious newbie here ... 
Agreed. I don't think it was intended, but we should be
cautious with our language when we address strangers...

> Maybe he /is/ running Jython and failed to explain that properly? 
Not likely, since he wrote "python24". I think the newest Jython
is 2.2a1...


From donn at u.washington.edu  Thu Feb 16 13:05:36 2006
From: donn at u.washington.edu (Donn Cave)
Date: Thu, 16 Feb 2006 10:05:36 -0800
Subject: How to run shell commands within python
References: <1140074469.258382.24620@f14g2000cwb.googlegroups.com>
	<mailman.1993.1140077329.27775.python-list@python.org>
Message-ID: <donn-2F88D0.10053616022006@gnus01.u.washington.edu>

In article <mailman.1993.1140077329.27775.python-list at python.org>,
 "Fredrik Lundh" <fredrik at pythonware.com> wrote:

> (also note that most trivial shell commands are better done in
> python.  most uses of cat, for example, can be trivially emulated
> with one or two lines of python...)

Though the knowledge required to do this may be more trivial
for some of us than others!  "cat" probably doesn't have much
going for it that a naive implementation would miss - some
versions will recreate "holes", but most applications will never
miss this.  You can replace "mv" with os.rename() if you don't
care that it will fail when the destination is on a different
filesystem.  Etc.

   Donn Cave, donn at u.washington.edu


From bradfordh at gmail.com  Tue Feb 21 22:48:53 2006
From: bradfordh at gmail.com (Tempo)
Date: 21 Feb 2006 19:48:53 -0800
Subject: What are COM-enabled applications?
Message-ID: <1140580133.293283.322870@f14g2000cwb.googlegroups.com>

As the subject of this post suggests, I have one question; what are
COM-enabled applications? I believe Microsoft Word is one of these
apps, but what else? Is a web browser, Paint, Solitare, games, etc? I'm
not sure if it varies from operating system to operating system, but I
am talking about COM applications in Windows. Thanks for any and all of
your help and time.



From steve at REMOVETHIScyber.com.au  Thu Feb 16 12:11:32 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 17 Feb 2006 04:11:32 +1100
Subject: web crawler in python or C?
References: <1140069412.051298.242150@g44g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.16.17.11.30.919359@REMOVETHIScyber.com.au>

On Wed, 15 Feb 2006 21:56:52 -0800, abhinav wrote:

> Hi guys.I have to implement a topical crawler as a part of my
> project.What language should i implement
> C or Python?Python though has fast development cycle but my concern is
> speed also.I want to strke a balance between development speed and
> crawler speed.Since Python is an interpreted language it is rather
> slow.

Python is no more interpreted than Java. Like Java, it is compiled to
byte-code. Unlike Java, it doesn't take three weeks to start the runtime
environment. (Okay, maybe it just *seems* like three weeks.)

The nice clean distinctions between "compiled" and "interpreted" languages
haven't existed in most serious programming languages for a decade or
more. In these days of tokenizers and byte-code compilers and processors
emulating other processors, the difference is more of degree than kind.

It is true that standard Python doesn't compile to platform dependent
machine code, but that is rarely an issue since the bottleneck for most
applications is I/O or human interaction, not language speed. And for
those cases where it is a problem, there are solutions, like Psycho.

After all, it is almost never true that your code must run as fast as
physically possible. That's called "over-engineering". It just needs to
run as fast as needed, that's all. And that's a much simpler problem to
solve cheaply.



> The crawler which will be working on huge set of pages should be
> as fast as possible.

Web crawler performance is almost certainly going to be I/O bound. Sounds
to me like you are guilty of trying to optimize your code before even
writing a single line of code. What you call "huge" may not be huge to
your computer. Have you tried? The great thing about Python is you can
write a prototype in maybe a tenth the time it would take you to do the
same thing in C. Instead of trying to guess what the performance
bottlenecks will be, you can write your code and profile it and find the
bottlenecks with accuracy.


> One possible implementation would be implementing
> partly in C and partly in Python so that i can have best of both
> worlds.

Sure you can do that, if you need to. 

> But i don't know to approach about it.Can anyone guide me on
> what part should i implement in C and what should be in Python?

Yes. Write it all in Python. Test it, debug it, get it working. 

Once it is working, and not before, rigorously profile it. You may find it
is fast enough.

If it is not fast enough, find the bottlenecks. Replace them with better
algorithms. We had an example on comp.lang.python just a day or two ago
where a function which was taking hours to complete was re-written with a
better algorithm which took only seconds. And still in Python.

If it is still too slow after using better algorithms, or if there are no
better algorithms, then and only then re-write those bottlenecks in C for
speed.



-- 
Steven.



From grante at visi.com  Sat Feb 11 09:09:47 2006
From: grante at visi.com (Grant Edwards)
Date: Sat, 11 Feb 2006 14:09:47 -0000
Subject: Pyserial handobook
References: <1139655808.197478.64160@g43g2000cwa.googlegroups.com>
Message-ID: <11urs1b5gl93e1c@corp.supernews.com>

On 2006-02-11, Zarathustra <lormayna at gmail.com> wrote:

> Hi, where I can find the pyserial handbook??

I don't think there is anything called the "pyserial handbook".
The documentation for pyserial is at http://pyserial.sourceforge.net/

It's the first hit when you google "pyserial".  Shocker, eh?

-- 
Grant Edwards                   grante             Yow!  .. If I had heart
                                  at               failure right now,
                               visi.com            I couldn't be a more
                                                   fortunate man!!


From kent at kentsjohnson.com  Thu Feb 23 13:16:40 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Thu, 23 Feb 2006 13:16:40 -0500
Subject: need help regarding compilation
In-Reply-To: <1140717481.804798.195070@z14g2000cwz.googlegroups.com>
References: <1140714583.014871.194640@p10g2000cwp.googlegroups.com>
	<46694pF9ms9bU1@uni-berlin.de>
	<1140717481.804798.195070@z14g2000cwz.googlegroups.com>
Message-ID: <43fdf77e$1_3@newspeer2.tds.net>

fidlee wrote:
>>Try this:
>>
>>def fac(x):
>> if x<=1:return 1
>> return x*fac(x-1)
> 
> 
> I am still getting an error in compilation. Would be really thankful if
> someone could tell me as to what is going wrong.

Try running the compiler under Java 1.4, or just run the class in the 
jython interpreter without compiling it first. For simple examples like 
this you don't need to compile, just run it with
   jython factor.py

Kent


From Syrinx at dbtech.net  Mon Feb 13 02:50:43 2006
From: Syrinx at dbtech.net (Syrinx at dbtech.net)
Date: Mon, 13 Feb 2006 01:50:43 -0600
Subject: newbie SWIG typemap question
Message-ID: <die0v19sdk43sorln2h9r4n0jubcgimp1d@4ax.com>

Hi everyone.  I'm new to SWIG, and I'm trying to wrap a C library for
Python.

I have a function that is declared similarly to this:

double *foo(int x);

The function returns a pointer to an array of 7 double values.  I want
to return a 7-tuple to Python.  I've been trying variations of the
following typemap, but I get a segmentation fault when I try it.
(It's been awhile since I've done any C, so it may be an obvious C
error, I'm not sure.)

Can anyone tell me what's wrong, or just show me how to accomplish
what I'm after?  I'd appreciate it a lot.  Thank you.

%typemap(python, out) double* {
    int i;
    PyObject *o = PyTuple_New(7);
    for(i = 0; i < 7; i++) {
        PyObject *o2 = PyFloat_FromDouble((double)$1[i]);
        PyTuple_SET_ITEM(o, i, o2);
    }
    $result = o;
} 



From caseyhHAMMER_TIME at istar.ca  Tue Feb  7 15:59:09 2006
From: caseyhHAMMER_TIME at istar.ca (Casey Hawthorne)
Date: Tue, 07 Feb 2006 20:59:09 GMT
Subject: Too Many if Statements?
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
Message-ID: <6e2iu1hdb8fvlfkcuulloiiq1khlbhret1@4ax.com>

Try the state(s) pattern!

"slogging_away" <hinnc at yahoo.com> wrote:

>Hi - I'm running Python 2.4.2 (#67, Sep 28 2005, 12:41:11) [MSC v.1310
>32 bit (Intel)] on win32, and have a script that makes numerous checks
>on text files, (configuration files), so discrepancies can be reported.
> The script works fine but it appears that I may have hit a wall with
>'if' statements.
>
>Due to the number of checks perfromed by the script on the text files,
>(over 500), there are quite a few 'if' statements in the script, (over
>1150).  It seems that it is at the point that when I add any additional
>'if' statements the script will not run.  No error is produced - it
>just returns to the python prompt much the same as when a successful
>'Check Module' command is selected.  If I delete some other 'if'
>statements the new ones work so it appears that it has hit a limit on
>the number of 'if' statements.  This has stunted any further checks for
>the script to make on the text files.
>
>Hs anyone ever run into this sort of thing?
--
Regards,
Casey


From mac at calmar.ws  Sat Feb 18 12:17:19 2006
From: mac at calmar.ws (calmar)
Date: Sat, 18 Feb 2006 18:17:19 +0100
Subject: general coding issues - coding style...
References: <slrndve8oe.5jb.mac@news.calmar.ws> <45ool3F7ipqbU1@uni-berlin.de>
Message-ID: <slrndvelkv.nrn.mac@news.calmar.ws>

On 2006-02-18, Diez B. Roggisch <deets at nospam.web.de> wrote:

Hi Diez,

>   - why are these {{{ thingies there?

markers for folding for vim
http://www.calmar.ws/tmp/sc.png

>   - use string interpolation like "Foo %s %i" % ("bar", 1) instead of 
> concatenating strings.

I see, get's shorter and so, and I can break lines.
(seems to me, after  ( or [ or so, I can use a new line without
to worry)

>   - it seems that you could benefit from a class instead of a bunch of 
> functions & few globals. No need to go too crazy about OO, but it has 
> its merits

I see. Maybe I could then build some classes for that prog,
especially since I use only one file, it probably would make
some sense for getting a better structure.

>
>   - try using something like glade - creating GUIs by hand sucks 
> big-timer :)

I should (seriously) check out probably.

>   - read up about unicode and encodings, what they mean and why and when 
> to use what. Really. Most problems in that field stem from people being 
> sort of ignorant on that topic and just wiggling themselves through all 
> the time - in the end, messing up stuff. It really _isn't_ that complicated.

I read up. In fact, basically it does not seem to be that complicate.
Unicode just a 'numbered' list of all available character, and
e.g. uft-8 a organized way to 'store' those 'numbers' wisely
into bytes.

I still have some problems with that (and gave up), but since I begin to
now understand it somebit more, I should try/check again.

>   - when creating string-keyed dicts, the idiom
>
>     dict(foo="bar",
>          baz="pillepalle")

I see, I changed too.

Thanks a lot,
marco

-- 
  calmar

          (o_  It rocks: LINUX + Command-Line-Interface
          //\
          V_/_                     http://www.calmar.ws


From law_order_3 at hotmail.com  Thu Feb 16 18:06:47 2006
From: law_order_3 at hotmail.com (asdsd sir)
Date: Thu, 16 Feb 2006 23:06:47 +0000
Subject: Some general questions about using "stdin","stdout"....
In-Reply-To: <BAY12-F8EAB7B87DF62D425E9EC5E8FB0@phx.gbl>
Message-ID: <BAY12-F6AC755B93367DBFB14F3CE8FB0@phx.gbl>

thank you very much for your help...
my big mistake,was to believe that "|" is the pipe symbol for both,unix and 
python...
it is really annoying,how such a simple thing can mess things

Thank you for clearing this out.

_________________________________________________________________
Free blogging with MSN Spaces  http://spaces.msn.com/?mkt=nl-be



From bignose+hates-spam at benfinney.id.au  Mon Feb 27 20:37:50 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 28 Feb 2006 12:37:50 +1100
Subject: PEP 354 -- "in" operator?
References: <87accdplbj.fsf@rose.polar.local>,
	<roy-99AF06.10301427022006@reader2.panix.com>
Message-ID: <87vev0w9e9.fsf@rose.polar.local>

[fixing References field. Please reply in the original thread so I can
find you easily.]

Roy Smith <roy at panix.com> writes:
> If I have an enum, how can I verify that it's a legal value?  Can I
> do:
>
> Weekdays = enum('sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat')
>
> def foo (day):
>    if day not in Weekdays:
>       raise ValueError

The current PEP text doesn't specify; that's an omission on my
part. The answer should be "yes, an enum can be tested for
membership".

I'll add that to the specification.

> Also, do enums have __dict__ slots?

Not specified as having one, no.

> Can I do something like:
>
> day = 'sun'
> print Weekdays.__dict__[day]

You can do the same thing more elegantly by explicitly querying the
attributes of the enumeration::

    >>> day = 'sun'
    >>> print getattr(Weekdays, day)
    sun

-- 
 \            "There was a point to this story, but it has temporarily |
  `\                 escaped the chronicler's mind."  -- Douglas Adams |
_o__)                                                                  |
Ben Finney


From reply.in.the.newsgroup at my.address.is.invalid  Mon Feb 13 03:45:24 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Mon, 13 Feb 2006 09:45:24 +0100
Subject: Writing a Web Robot in Python
References: <1139818483.962291.131570@g47g2000cwa.googlegroups.com>
Message-ID: <lhh0v19mhg9th3fqif26grkdi282hbmki5@4ax.com>

mudgen at gmail.com:
>Anybody know some good places to go to get information on
>building a web robots?

Some pointers:
http://safari.oreilly.com/0596005776
http://www.python.org/doc/2.4.2/lib/module-HTMLParser.html
http://www.crummy.com/software/BeautifulSoup/
http://www.python.org/doc/2.4.2/lib/module-robotparser.html
http://cheeseshop.python.org/pypi/spider.py/0.5

-- 
Ren? Pijlman


From steve at holdenweb.com  Fri Feb 10 10:55:58 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 10 Feb 2006 10:55:58 -0500
Subject: Too Many if Statements?
In-Reply-To: <1139583025.428875.225500@g14g2000cwa.googlegroups.com>
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>	<6e2iu1hdb8fvlfkcuulloiiq1khlbhret1@4ax.com>	<1139517959.741090.28560@g14g2000cwa.googlegroups.com>	<dshvb4$jfn$1@wake.carmen.se>
	<1139583025.428875.225500@g14g2000cwa.googlegroups.com>
Message-ID: <dsid2f$b99$1@sea.gmane.org>

slogging_away wrote:
> Magnus Lycka wrote:
> 
> 
>>What happens if you run it from the command line instead
>>of IDLE? After all, it might be some problem in IDLE involved
>>here. Even if it doesn't work correctly outside IDLE, I was
>>thinking that IDLE might swallow some kind of error message.
> 
> 
> Excellent suggestion, (behold the power of the command line!).  I ran
> two saved versions of the script that had produced the symptom
> originally described.  The fist seemed to be caused by too many 'if'
> statements, the second by adding another array, but both came up with
> the same system error at the command prompt level shown here:
> 
> SystemError: com_backpatch: offset too large
> 
> This error is not produced with the IDLE console but is seen only when
> executing from the command line.  I'll search around and see if I can
> determine what this means and a possible fix.  Thanks for the
> suggestion!
> 
Now we have seen the real error message it does appear as though this is 
an error in the interpreter triggered by an unusually long source 
program. See

   http://mail.python.org/pipermail/python-list/2004-November/249270.html

for a previous discussion. In that email Diez Roggisch says:

"""I can't believe that a program with 10000 lines only adding strings 
can't be written in a more concise way, which would most probably solve 
your problem. So I suggest you post some parts of your code so that we 
can have a look at it and suggest a solution."""

The same applies here.

Clearly it would be a good idea to remove whatever problem is causing 
the error, but in the meantime is there some way your code could be 
written more concisely? Or even split up into multiple modules?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From buzzard at urubu.freeserve.co.uk  Wed Feb 15 20:39:41 2006
From: buzzard at urubu.freeserve.co.uk (Duncan Smith)
Date: Thu, 16 Feb 2006 01:39:41 +0000
Subject: Poisson Distribution (for a newbie)
In-Reply-To: <1140041825.586531.287400@z14g2000cwz.googlegroups.com>
References: <1140041825.586531.287400@z14g2000cwz.googlegroups.com>
Message-ID: <43f3d6b5.0@entanet>

diffuser78 at gmail.com wrote:
> I am simulating an event where users come into the pool randomly
> starting at time T=0, i.e. For Example, 2 users came at T= 0 into the
> the pool, 3 users came at T= 1 into the the pool, 5 users came at T=2
> ,..........,54 users came at T=45 etc. As cumulative number of users
> goes above 1024, we stop the process.
> 
> I want to mimic such kind of distribution using poison traffic ( a bell
> shaped curve). I looked into wikipedia and some other tutorials but I
> wasn't sure how many parameter does the above kind of distribution
> would require.
> 
> Could somebody put some light on this issue.
> 
> PS:: This is not exactly a programming issue but since I was using it
> in one of the Python programs, I thought somebody might have used
> similar thing in past and could help. Thanks.
> 

The Poisson has one parameter, its mean. See e.g.
http://www.itl.nist.gov/div898/handbook/eda/section3/eda366j.htm

Duncan


From fuzzyman at gmail.com  Thu Feb  2 09:03:32 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 2 Feb 2006 06:03:32 -0800
Subject: webbrowser module + urls ending in .py = a security hole?
In-Reply-To: <mailman.1351.1138887683.27775.python-list@python.org>
References: <1138593557.824516.116400@g14g2000cwa.googlegroups.com>
	<1138626217.999480.153140@g43g2000cwa.googlegroups.com>
	<1138651762.673682.192210@g43g2000cwa.googlegroups.com>
	<mailman.1242.1138654889.27775.python-list@python.org>
	<1138856193.857136.196670@g47g2000cwa.googlegroups.com>
	<1138873193.505531.125600@g49g2000cwa.googlegroups.com>
	<mailman.1351.1138887683.27775.python-list@python.org>
Message-ID: <1138889011.984702.138220@g44g2000cwa.googlegroups.com>


Peter Hansen wrote:
> Fuzzyman wrote:
> > Blair P. Houghton wrote:
> >>webbrowser.py module's handling of http:// accesses
> >>is definitely different from its handling of  file://  accesses.
> >
> > It's worth working out if this is down to webbrowser.py *or* Firefox.
> > Try launching firefox with the path to the py file and seeing what it
> > does.
> >
> > If it is webbrowser.py then it is worth fixing.
>
> I'm not sure if my posts got through a couple of days ago, but I thought
> I already answered this.  webbrowser.py calls os.startfile(), which just
> passes things off to the OS.  If it's an http:// call, the registry
> entries point to Firefox (with a --url option, as I recall) but
> os.startfile() obviously doesn't always just load a web browser, so if
> the file happens to be a local .py file, it runs it.
>
> I believe you'll get identical results if you pass the same url as you
> are passing webbrowser.py to the START command:
>
> start "" "file:///c:/svn/ccvi86/main.py"
>
> On my machine that runs the file.
>
> start "" "http://www.engcorp.com/main/files/ixcore.py"
>
> And that one displays the file in Firefox.
>
> So the bug, if it can be called that, is that on Windows webbrowser.py
> doesn't do real work, but just passes responsibility to an underlying
> function which works as expected only for http: protocol stuff.
>

I can't see your posts on google, but that's what I suggested might be
the case nearer the start of this thread. ;-)

Hmmm.... if it's not a bug, it at least needs documenting.

All the best,


Fuzzyman
http://www.voidspace.org.uk/python/index.shtml


> -Peter



From neuzhoundxx at yahoo.com  Wed Feb 22 21:33:22 2006
From: neuzhoundxx at yahoo.com (john peter)
Date: Wed, 22 Feb 2006 18:33:22 -0800 (PST)
Subject: ANSWERED: event/job scheduling
In-Reply-To: <20060222225555.64622.qmail@web36701.mail.mud.yahoo.com>
Message-ID: <20060223023322.46508.qmail@web36701.mail.mud.yahoo.com>

about further investigation, i figured the basic answer out. gosh, i love python! :-)
  
  import sched, time
  
  def print_time():
     print "From print_time", time.time()
  
  if __name__ == '__main__':
  
     s = sched.scheduler(time.time, time.sleep)
     fmt = '%Y-%m-%d-%H:%M'
     print time.time()
     s.enterabs(time.mktime(time.strptime('2006-02-22-21:15', fmt)), 1, print_time, ())
     s.enterabs(time.mktime(time.strptime('2006-02-22-21:17', fmt)), 1, print_time, ())
     s.enterabs(time.mktime(time.strptime('2006-02-22-21:19', fmt)), 1, print_time, ())
     s.run()
     print time.time()

john peter <neuzhoundxx at yahoo.com> wrote:  i'd like to do the following kind of event/job scheduling:
  run some task(s) (python code) everyday at (say) 8am for (say) a week.
  
  i need to do this for both windows xp and suse linux machines. although i know
  that i can use cron or its equivalent in windows to kick off the python interpreter,
  i was kinda hoping python has a builtin mechanism i can use for both OSes.
  
  can python's scheduler class do the job? if so, can someone share some code
  snippets (it's not clear to me from reading the docs if python's scheduler class
  can do the job).
  
  if python's scheduler class cannot do the job, can someone recommend a  third-party software/library that can do the job?  thanks for any  help!
  
  
__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com -- 
http://mail.python.org/mailman/listinfo/python-list



		
---------------------------------
 
 What are the most popular cars? Find out at Yahoo! Autos 
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From zunbeltz at gmail.com  Mon Feb 20 03:14:54 2006
From: zunbeltz at gmail.com (zunbeltz at gmail.com)
Date: 20 Feb 2006 00:14:54 -0800
Subject: zope 3.2 and imprt errors
In-Reply-To: <mailman.2082.1140231416.27775.python-list@python.org>
References: <1140103828.129189.37700@o13g2000cwo.googlegroups.com>
	<mailman.2082.1140231416.27775.python-list@python.org>
Message-ID: <1140423294.057092.9120@g47g2000cwa.googlegroups.com>

Hi Benji

Thanks, but i've solved installing zope from svn instead of tarball

Regars

Zunbeltz



From gregory.petrosyan at gmail.com  Mon Feb 13 16:03:28 2006
From: gregory.petrosyan at gmail.com (Gregory Petrosyan)
Date: 13 Feb 2006 13:03:28 -0800
Subject: Pythonic gui format?
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<45c9pcF5vc6bU1@individual.net>
Message-ID: <1139864608.835975.204100@g43g2000cwa.googlegroups.com>

Nice, thanks!
BTW, maybe decorators could do good job here (something like @expose in
TG?)



From eric_brunel at despammed.com  Thu Feb  9 09:11:31 2006
From: eric_brunel at despammed.com (Eric Brunel)
Date: Thu, 09 Feb 2006 15:11:31 +0100
Subject: Getting Tkinter Text contents before destruction
References: <p4KdnfDfuth6knXeRVn-jw@nmt.edu> <ds94d4$v95$1@daisy.noc.ucla.edu>
Message-ID: <ops4plpho0rqur0o@eb.pragmadev>

On Mon, 06 Feb 2006 19:32:52 -0800, James Stroud <jstroud at ucla.edu> wrote:
> If TextWidgetsFrame inherets from frame, you can override the destroy()  
> method which gets called when the parent gets destroyed.

Unfortunately, it doesn't get called. Everything actually happens at tk  
level, where the destroy *command* gets called, but doesn't inform the  
Python interface object. The destroy method is only a way to call tk's  
destroy command, but overloading it has an effect only when called from  
Python, not from the underlying tk layer.
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17;8(%,5.Z65\'*9--56l7+-'])"


From bradfordh at gmail.com  Tue Feb  7 23:42:58 2006
From: bradfordh at gmail.com (Tempo)
Date: 7 Feb 2006 20:42:58 -0800
Subject: HTML page into a string
In-Reply-To: <mailman.1587.1139372443.27775.python-list@python.org>
References: <1139367066.060542.62260@g14g2000cwa.googlegroups.com>
	<mailman.1587.1139372443.27775.python-list@python.org>
Message-ID: <1139373778.848429.54470@f14g2000cwb.googlegroups.com>

Perfect. Thanks a bunch for clearing that all up for me. You have
delayed some long lost hours for me.



From bradfordh at gmail.com  Wed Feb 15 14:39:03 2006
From: bradfordh at gmail.com (Tempo)
Date: 15 Feb 2006 11:39:03 -0800
Subject: Python, Forms, Databases
In-Reply-To: <xoOdnSSGbYRFHW7eRVn-og@comcast.com>
References: <1140030788.083799.45060@f14g2000cwb.googlegroups.com>
	<xoOdnSSGbYRFHW7eRVn-og@comcast.com>
Message-ID: <1140032343.627599.217590@g14g2000cwa.googlegroups.com>

Larry I do see your point. There does seem to be a lot more support for
PHP and MySQL together than there is Python and ASP. But I want to
first try to accomplish my goal by using Python first before I give up
and revert back to PHP. So if I was going to parse HTML forms and place
the data into a MySQL database, what should I use? CGI module? Zope?
Webware? Thanks for any and all help.



From btaranto at gmail.com  Tue Feb  7 11:46:27 2006
From: btaranto at gmail.com (btaranto at gmail.com)
Date: 7 Feb 2006 08:46:27 -0800
Subject: python-ldap
Message-ID: <1139330787.863625.144520@o13g2000cwo.googlegroups.com>

y0!
where can i get module of python-ldap to work with eclipse ide on
windows?

tks!



From lycka at carmen.se  Fri Feb  3 08:13:14 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 03 Feb 2006 14:13:14 +0100
Subject: How do I dynamically create functions without lambda?
In-Reply-To: <mailman.1375.1138951441.27775.python-list@python.org>
References: <1138389517.896043.7450@g47g2000cwa.googlegroups.com>	<pan.2006.01.28.00.35.06.174939@REMOVETHIScyber.com.au>	<1138436008.628882.126510@g44g2000cwa.googlegroups.com>	<pan.2006.01.28.12.02.34.293286@REMOVETHIScyber.com.au>	<drr978$oat$1@xenon.Stanford.EDU>	<1ha3g79.1gcm6x1yziggyN%aleaxit@yahoo.com>	<mailman.1358.1138907003.27775.python-list@python.org>	<1ha5e9r.gs34le12dm1luN%aleaxit@yahoo.com>
	<mailman.1375.1138951441.27775.python-list@python.org>
Message-ID: <drvktc$8mm$1@wake.carmen.se>

Terry Hancock wrote:
> Note also in the datasets that *overperformers* *underrated*
> their performance.

Well, if you're the best in the group and aren't perfectly exact
in your evaluation of your position relative to others, you can't
overrate yourself. It's quite natural that the self evaluation curve
would be flatter than the actual curve, since "noise" will drive
the curve towards the middle, and it's also natural that the bad
performers are also less good at evaluating their own work, but
the strange thing is that the lowest quartile has higher self-
evaluation than the second lowest. I can't say my general picture
of coworkers generally support *this*, but I supect we've all run
across people who were incompetent and unaware of it now and then...


From superchruper at gazeta.pl  Thu Feb 16 07:58:41 2006
From: superchruper at gazeta.pl (Pawel)
Date: 16 Feb 2006 04:58:41 -0800
Subject: Visual Report Editor
Message-ID: <1140094721.295791.319900@g47g2000cwa.googlegroups.com>

Hello,
I plan to make Visual Reporting Editior, a new product for
corporate-class systems. Data will be in XML and in my application,
designer should be able to make fascinating templates of reports. I
will use Python and MSVS 2005 Pro. My question is, which libaries will
be useful in my job. I plan to buy Qt and make visual layer of
application using Qt. I'm making businessplan soI have to decide which
tool will be useful. Is Qt best choice, maybe I should buy something
different?

Pawel



From 63q2o4i02 at sneakemail.com  Sat Feb 18 23:41:14 2006
From: 63q2o4i02 at sneakemail.com (63q2o4i02 at sneakemail.com)
Date: 18 Feb 2006 20:41:14 -0800
Subject: Python vs. Lisp -- please explain
Message-ID: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>

Hi, I've been thinking about Python vs. Lisp.  I've been learning
Python the past few months and like it very much.  A few years ago I
had an AI class where we had to use Lisp, and I absolutely hated it,
having learned C++ a few years prior.  They didn't teach Lisp at all
and instead expected us to learn on our own.  I wasn't aware I had to
uproot my thought process to "get" it and wound up feeling like a
moron.

In learning Python I've read more about Lisp than when I was actually
trying to learn it, and it seems that the two languages have lots of
similarities:

http://www.norvig.com/python-lisp.html

I'm wondering if someone can explain to me please what it is about
Python that is so different from Lisp that it can't be compiled into
something as fast as compiled Lisp?  From this above website and
others, I've learned that compiled Lisp can be nearly as fast as C/C++,
so I don't understand why Python can't also eventually be as efficient?
 Is there some *specific* basic reason it's tough?  Or is it that this
type of problem in general is tough, and Lisp has 40+ years vs Python's
~15 years?


Thanks
Michael



From larry.bates at websafe.com  Sat Feb 25 16:48:20 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Sat, 25 Feb 2006 15:48:20 -0600
Subject: spaces at ends of filenames or directory names on Win32
In-Reply-To: <hrsLf.21068$915.9031@southeast.rr.com>
References: <dtkuav$keb$1@solaris.cc.vt.edu> <43FE1B5E.8060009@websafe.com>
	<pan.2006.02.23.22.22.17.122779@REMOVETHIScyber.com.au>
	<U5adnSstztOb12PenZ2dnUVZ_sOdnZ2d@comcast.com>
	<hrsLf.21068$915.9031@southeast.rr.com>
Message-ID: <4400D0A4.2000303@websafe.com>

Jeffrey Schwab wrote:
> Larry Bates wrote:
> 
>> IMHO leading and/or trailing spaces in filenames is asking for
>> incompatibilities with cross-platform file access.
> 
> With what platforms specifically?
> 
>> Much like
>> using single-quote in filenames which are perfectly legal in
>> DOS/Windows, but Linux doesn't like much.
> 
> Uh...  What Linux are you using?  And what FS?
> 
> $ touch "'" && ls
> '
> $ rm "'"
> $

I stand corrected if you put double quotes around filenames
it does work.  That to me means that single quotes
in filenames are somehow "different" than other characters.
You must handle these filenames differently (at least from
the command line).  Thanks for pointing this out.

-Larry Bates



From onurb at xiludom.gro  Mon Feb 20 08:30:07 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Mon, 20 Feb 2006 14:30:07 +0100
Subject: Quesion about the proper use of __slots__
In-Reply-To: <1140432487.272405.297100@f14g2000cwb.googlegroups.com>
References: <1140424508.393412.79140@o13g2000cwo.googlegroups.com>
	<43f9825e$0$4777$636a55ce@news.free.fr>
	<1140426860.033363.237150@o13g2000cwo.googlegroups.com>
	<dtc219$h0a$01$1@news.t-online.com>
	<1140428016.170547.315710@g47g2000cwa.googlegroups.com>
	<1140432487.272405.297100@f14g2000cwb.googlegroups.com>
Message-ID: <43f9c481$0$3317$636a55ce@news.free.fr>

Zefria wrote:
> Well, my computer tends to run at about 497 to 501 out of 504 MB of RAM
> used once I start up Gnome, XMMS, and a few Firefox tabs, and I'd
> prefer not to see things slipping into Swap space if I can avoid it,
> and the fighter data would be only part of a larger program.
> 
> And as I said, learning how to use __slots__ is important enough to
> hazard a premature guess this time around. If I mess up, the worst that
> happens is that I have to write down a new variable name in two places
> instead of one now.

Ok, but don't forget that using slots prevents you from attaching new
attributes on the fly on a given instance - which can be quite handy for
some use cases.


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From wjzrules at gmail.com  Fri Feb 24 07:52:13 2006
From: wjzrules at gmail.com (wjzrules at gmail.com)
Date: 24 Feb 2006 04:52:13 -0800
Subject: KPanelApplet using Python
In-Reply-To: <mailman.2391.1140782029.27775.python-list@python.org>
References: <mailman.2391.1140782029.27775.python-list@python.org>
Message-ID: <1140785533.642904.263660@j33g2000cwa.googlegroups.com>

I am not a Python expert, but I am using KDE on my workstation at home
and a big Python fan ;)

A couple of days ago I was thinking the same and found how to create
systray apps for Windows!
You can make this kind of apps with wxPython.

When I was at home and behind my KDE desktop I tried the Windows code
and it worked flawlessly in KDE. It was integrating into the kicker
without problems.

This was the thread that helped me out:
http://groups.google.com/group/comp.lang.python/tree/browse_frm/thread/2113ca0f132f2f49/96f32dcd5e6f96ae

Try to play with the code and you will see it will work :)



From bearophileHUGS at lycos.com  Mon Feb 27 05:51:05 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 27 Feb 2006 02:51:05 -0800
Subject: how do I factor a number down to one digit?
In-Reply-To: <1141036302.641818.72570@i39g2000cwa.googlegroups.com>
References: <1141036302.641818.72570@i39g2000cwa.googlegroups.com>
Message-ID: <1141037465.194492.63710@j33g2000cwa.googlegroups.com>

Allan>I hope this isn't too stupid of a question.

It's a simple problem, but it's not a stupid question, this is a
possible solution:

data = "myname"
radix = str(sum(ord(c)-96 for c in data))
while len(radix) > 1:
    radix = str(sum(int(c) for c in radix))
print "The radix of:\n", data, "\n\nIs:\n", radix

Bye,
bearophile



From deets at nospam.web.de  Mon Feb 20 06:52:44 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 20 Feb 2006 12:52:44 +0100
Subject: cElementTree encoding woes
References: <45tkj3F8d9fpU1@uni-berlin.de> <dtc9mn$pn3$03$1@news.t-online.com>
Message-ID: <45tovbF8ffrgU1@uni-berlin.de>

> Both my python2.3 and python2.4 interpreters seem to know "Windows-1252":
> 
>>>> import codecs
>>>> codecs.open("windows.xml", encoding="windows-1252")
> <open file 'windows.xml', mode 'rb' at 0x403737e0>
> 
> Maybe the problem lies in the python installation rather than
> cElementTree? Just guessing, though.

Hm. No idea why I was under the impression they weren't there - but still,
it doesn't work: I get

inf = file(sys.argv[1])
#inf = codecs.StreamRecoder(inf,encoder, decoder, reader, writer)

for event, elem in cElementTree.iterparse(inf):
    pass

pukes on me with

Traceback (most recent call last):
  File "./splitter.py", line 31, in ?
    for event, elem in cElementTree.iterparse(inf):
  File "<string>", line 61, in __iter__
SyntaxError: not well-formed (invalid token): line 35, column 34

That is the first french character encountered.

"""<title>Introduction aux Probabilit?s</title>"""


So - then the problem is not the codec being ignored, but it simply is not
working. 

Regards,

Diez


From erniedude at gmail.com  Tue Feb  7 10:08:45 2006
From: erniedude at gmail.com (Ernesto)
Date: 7 Feb 2006 07:08:45 -0800
Subject: Regular Expression Syntax Help
Message-ID: <1139324925.233027.26430@o13g2000cwo.googlegroups.com>

I'm trying to get the right syntax for my regular expression.  The
string I'm trying to parse is:

# myString
[USELESS DATA]
Name:  David Dude
[USELESS DATA]

Right now, I'm using the following code:


pattern_Name= '''(?x)
    Title:\s+(\w+)\s+
'''
names = re.findall(pattern_Name, myString)
print names

This prints out a list containing only the first names.  I want to
search the string until it finds a '\n' endline, but I experimented
with that, and couldn't find what I need.



From Pavol.Severa at gmail.com  Wed Feb 15 05:33:39 2006
From: Pavol.Severa at gmail.com (palo)
Date: 15 Feb 2006 02:33:39 -0800
Subject: choose and open a folder in Windows
Message-ID: <1139999619.113399.67010@g47g2000cwa.googlegroups.com>

Hello
I wrote a little script (that will be used only under Windows if at
all) where the user should choose a directory and the script will then
process some data files in the directory and write the result there. To
make it a bit more pleasant, it would be nice if the directory were
chosen by the standard win directory chooser. When the script is done,
it could open the the directory, so that the user can check the
results. How to do these two things? (I searched this forum and found a
simple solution for the first one, using Tkinter - so there is just an
unimportant question whether one really needs Tkinter to start a
standard windows dialog. But I didn't find how to make windows to open
a given directory in file expolorer)
P.



From cam.ac.uk at mh391.invalid  Fri Feb 24 04:57:17 2006
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Fri, 24 Feb 2006 09:57:17 +0000
Subject: python-list/python-dev quoting style
Message-ID: <dtml9t$367$1@gemini.csx.cam.ac.uk>

Does anyone have a script to convert more conventional USENET quoting 
style like this:

John wrote:
 > Jacob Jingleheimer Schmidt <jjs at example.net> wrote in message-id 
<gratuitous-detail> on 29 February 2004:
 >> Lambda is the best Python feature ever!
 >
 > I disagree.

to the commonly used python-dev/python-list style like this:

[Jacob Jingleheimer Schmidt]
 >> Lambda is the best Python feature ever!

[John]
 > I disagree.
-- 
Michael Hoffman


From kylotan at gmail.com  Fri Feb  3 09:02:13 2006
From: kylotan at gmail.com (Ben Sizer)
Date: 3 Feb 2006 06:02:13 -0800
Subject: Another try at Python's selfishness
In-Reply-To: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
Message-ID: <1138974596.694169.198840@g44g2000cwa.googlegroups.com>


n.estner at gmx.de wrote:
> The main reason (at least for me) is that there's simply too much
> "magic" in it. Why does the expression left of the '.' get promoted to
> the first parameter?

One of the reasons I like Lua is because it doesn't do this, instead
using the : operator to designate method-style calls.

eg.
a:foo(b, c) -- looks up foo within a, and calls it with (a, b, c) as
parameters
a.foo(b, c) -- looks up foo within a, and calls it with (b,c) as
parameters

This means there doesn't need to be a distinction between methods and
functions, just a different operator to treat a function as if it was a
method.

When I started out in Python I figured that I could just assign
functions to objects and treat them then as if they were methods, as I
would in Lua, but quickly learned that it wasn't that simple.

-- 
Ben Sizer



From eoinrogers at gmail.com  Sun Feb  5 11:55:11 2006
From: eoinrogers at gmail.com (Byte)
Date: 5 Feb 2006 08:55:11 -0800
Subject: Learning Python
In-Reply-To: <mailman.1440.1139157631.27775.python-list@python.org>
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
	<1139156577.897100.69140@g43g2000cwa.googlegroups.com>
	<mailman.1440.1139157631.27775.python-list@python.org>
Message-ID: <1139158511.281394.126970@g47g2000cwa.googlegroups.com>

>what makes you think that basic Python functions work in radically
different ways on different platforms ?

Assumption. Im also new to programing, so could do something stupid
like think a Windows path is a command/input/etc. (really, ive done
things like that before.)

Now, im running this on a terminal, but am acctually writing my scripts
in a text editor. How can I get a script to do a sum with the editor?
e.g. it asks for a sum, then does it etc.



From __peter__ at web.de  Thu Feb 16 12:44:49 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 16 Feb 2006 18:44:49 +0100
Subject: pythonic way of 'b = list(a); b.append(4)"
References: <1140105883.069632.262530@g43g2000cwa.googlegroups.com>
Message-ID: <dt2dj8$h31$01$1@news.t-online.com>

szabi wrote:

> I have a list of three values and want to call a function with four
> parameters. I would like
> to write something like:
> 
> a = [1, 2, 3]
> f(*a, 4)
> 
> This is syntactically wrong, so is there a function which appends a
> value to a list and
> returns the new value, so that I could write something like this:
> 
> f(list(a).functional_append(4))
> 
> I can't modify 'a'.

Two more options: if you know the name of the function's fourth parameter
you can mix keyword and positional arguments

>>> def f(a, b, c, d):
...     return "f(a=%r, b=%r, c=%r, d=%r)" % (a, b, c, d)
...
>>> a = [1, 2, 3]
>>> f(d=42, *a)
'f(a=1, b=2, c=3, d=42)'

or you can use partial function application:

>>> def partial(f, *left):
...     def w(*right):
...             return f(*left+right)
...     return w
...
>>> partial(f, *a)(42)
'f(a=1, b=2, c=3, d=42)'

A generalized version of partial() will become part of the standard library
in Python 2.5.

Peter



From rschroev_nospam_ml at fastmail.fm  Tue Feb  7 15:45:23 2006
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Tue, 07 Feb 2006 20:45:23 GMT
Subject: Python Class use
In-Reply-To: <1139344110.219073.244830@f14g2000cwb.googlegroups.com>
References: <1139344110.219073.244830@f14g2000cwb.googlegroups.com>
Message-ID: <DF7Gf.241940$B43.7664779@phobos.telenet-ops.be>

S Borg schreef:
>  Hello,
> 
>  I am running Python on Mac OS X. The interpreter has been great for
> learning the basics, but I would now like to be able to reuse code.
> How do I write reusable code? I have done it "The Java way": write
> the class, and save it to my home directory, then call it from the
> interpreter, here is an example.
> 
> ########my saved file######
> class MyClass:
>   def f(self):
>       return 'calling f from MyClass'
> 
> #######interpreter#########
>>>> x = MyClass()
>>>> (unhelpful error mesages)
> 
> I hope I have clearly explained my problem.

I think so.

Python does this different from Java. One difference is that Python 
allows you to put more than one class in a module (you also don't have 
to put everything in a class; code can live in a module's global 
namespace too). Then, to use code from that module, you have to import 
it with the import statement.

Putting it all together, you could create a file MyModule.py which 
contains the code you mentioned, and then use it like this:

import MyModule

x = MyModule.MyClass()
x.f()

Or you could directly import MyClass into the global namespace like this:

from MyModule import MyClass

x = MyClass()
x.f()

But that's not recommended since it clutters the global namespace and 
makes it more difficult to see which name comes from which module.


-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From uche.ogbuji at gmail.com  Tue Feb  7 13:21:36 2006
From: uche.ogbuji at gmail.com (uche.ogbuji at gmail.com)
Date: 7 Feb 2006 10:21:36 -0800
Subject: Fromatting an xml file
In-Reply-To: <1138874224.989909.81620@z14g2000cwz.googlegroups.com>
References: <1138874224.989909.81620@z14g2000cwz.googlegroups.com>
Message-ID: <1139336496.210436.24110@z14g2000cwz.googlegroups.com>

sir_alex wrote:
> Hi! I have a little problem writing xml files formatted in a way like
> the following:
>
> <rootnode>
>          <node>bla</node>
>          <node>bla</node>
> </rootnode>
>
> Every new node element should have a tabulation before it, but when I
> use xml.dom.minidom I use writexml, which considers as a new node also
> the text (in my little example, "bla" phrases), so the best result I
> achieved has been the following
>
> <rootnode>
>         <node>
>                  bla
>         </node>
> </rootnode>
>
> but I don't want the text to be written on newlines... is there a good
> solution? Thanks!

That minidom behavior is fairly unsafe.  4Suite's PrettyPrinter is much
safer:

>>> from Ft.Xml import Parse
>>> from Ft.Xml.Domlette import PrettyPrint
>>> XML = "<rootnode><node>bla</node><node>bla</node></rootnode>"
>>> doc = Parse(XML)
>>> PrettyPrint(doc)
<?xml version="1.0" encoding="UTF-8"?>
<rootnode>
  <node>bla</node>
  <node>bla</node>
</rootnode>
>>>

http://4Suite.org

--
Uche Ogbuji                               Fourthought, Inc.
http://uche.ogbuji.net                    http://fourthought.com
http://copia.ogbuji.net                   http://4Suite.org
Articles: http://uche.ogbuji.net/tech/publications/



From tjreedy at udel.edu  Sat Feb 11 16:12:07 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 11 Feb 2006 16:12:07 -0500
Subject: "Is" is "is" [was: any way to customize the is operator?]
References: <1138342643.119111.281900@g14g2000cwa.googlegroups.com>	<mailman.1123.1138346366.27775.python-list@python.org>	<1138346774.949296.192520@g14g2000cwa.googlegroups.com>	<pan.2006.01.27.11.01.46.829464@REMOVETHIScyber.com.au><1139618017.571180.23790@g47g2000cwa.googlegroups.com>
	<dsk3pr$v6p$1@sea.gmane.org>
Message-ID: <dsljv7$74p$1@sea.gmane.org>


"> Lonnie Princehouse wrote:
>> Calling the wrapped version of this function from Python will produce a
>> Python wrapper which represents the same underlying C++ object, but is
>> not actually the same Python object:

What I think you need is a custom version of the .__eq__ (self,other) 
method that pierces thru the wrappers to compare the underlying C++ 
objects.  Then test a == b.

In Python, 'is' specifically means identity of Python objects.






From abhisek.datta at gmail.com  Sat Feb 18 01:40:00 2006
From: abhisek.datta at gmail.com (Abhisek Datta)
Date: Sat, 18 Feb 2006 06:40:00 +0000
Subject: RSA in python
In-Reply-To: <Q6-dnZ0YXf_7x2venZ2dnUVZ_tSdnZ2d@comcast.com>
References: <mailman.2057.1140187795.27775.python-list@python.org>
	<Q6-dnZ0YXf_7x2venZ2dnUVZ_tSdnZ2d@comcast.com>
Message-ID: <4e4a257e0602172240p2f4000eif2e34984850313e4@mail.gmail.com>

Hello,

Here is some debugging output:

---
pyKB-DEBUG: Connecting to http://192.168.0.2:8080/RPC2
pyKB-DEBUG: Initializing session: (sessionKey: ABCDEFGHIJKLMNO)
pyKB-DEBUG: Received public key:
-----BEGIN RSA PUBLIC KEY-----
MIGJAoGBALxi3tGXlSwRgn7/Km6mTSge+5ijQgIn3GvnZOeYyOo1DkubVtTaFj26
GWtJo43MEe1a5UlWKJEOpbKVCr4AASfFj8YmmRewH4SXdZ+w1Bad8amyzL2h8F7J
wJojOnocSs6xDE7o86CpZRUlojBefanMdCpu074QFktE63OD1zBBAgMBAAE=
-----END RSA PUBLIC KEY-----

Traceback (most recent call last):
  File "KB_Client.py", line 96, in ?
    kb.SessionInit(sessionKey="ABCDEFGHIJKLMNO")
  File "KB_Client.py", line 63, in SessionInit
    rsa = M2Crypto.RSA.load_pub_key("pubkey.pem")
  File "/usr/lib/python2.4/site-packages/M2Crypto/RSA.py", line 225,
in load_pub_key
    return load_pub_key_bio(bio)
  File "/usr/lib/python2.4/site-packages/M2Crypto/RSA.py", line 237,
in load_pub_key_bio
    rsa_error()
  File "/usr/lib/python2.4/site-packages/M2Crypto/RSA.py", line 162,
in rsa_error
    raise RSAError, m2.err_reason_error_string(m2.err_get_error())
M2Crypto.RSA.RSAError: no start line
---

You can clearly see the public key which I am receiving from an xmlrpc
server. Then I saved the public key in "pubkey.pem" file and then use
M2Crypto.RSA.load_pub_key() and I am getting the output as show above.

-abhisek

On 2/17/06, Heikki Toivonen <heikki at osafoundation.org> wrote:
> Abhisek Datta wrote:
> > I am looking for good RSA implementations in python that can import a
> > public key in PEM format and encrypt a buffer using the imported
> > public key. I tried m2crypto, but somehow it is giving me exceptions
> > which I couldnt solve as of now.
>
> What you are trying to do should be covered by M2Crypto. Without more
> context for the error (what was the file you were trying load, etc.) it
> is hard to say what is wrong. My first guess is that your pem file did
> not include the BEGIN/END lines.
>
> I would suggest you take a look at the tests and samples included in
> M2Crypto. They do show how to work with PEM files.
>
>
> M2Crypto 0.15: http://wiki.osafoundation.org/bin/view/Projects/MeTooCrypto
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From mensanator at aol.com  Mon Feb 27 20:43:43 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 27 Feb 2006 17:43:43 -0800
Subject: spaces at ends of filenames or directory names on Win32
References: <dtkuav$keb$1@solaris.cc.vt.edu><dtvoap$44m$1@solaris.cc.vt.edu>
	<4AKMf.283745$6p3.8940775@phobos.telenet-ops.be>
	<du03p9$qnc$1@solaris.cc.vt.edu>
Message-ID: <1141091023.570661.250590@j33g2000cwa.googlegroups.com>


rtilley wrote:
> Roel Schroeven wrote:
> > rtilley schreef:
> >
> >> This will at least allow me to ID folders that start with
> >> whitespace... from within Windows too :) yet I still cannot rename the
> >> folders after stripping the whitespace... attempting to gives an
> >> [Errno 2] No such file or directory. The strip seems to work right too
> >> according to the prints before and after.
> >
> >
> > Does the rename work if try with other names?
>
> Yes, the script can rename files that have no end whitespace. Also, I
> should note the the Windows GUI cannot rename the files. Same error...
> cannot stat the file. The only way I've been able to rename is through
> the cmd prompt using quotes like this:
>
> ren " bad file with end spaces " good_file_no_end_spaces
>
> I should also note that the code I posted earlier is misleading as
> os.listdir() gets dirs and files... not just dirs as I implied. Here's a
> better example that should get whitespace at either end (and does indeed
> on Mac and Unix... but not Windows)

It works for me.

And although you can't put leading spaces in file names using
Windows explorer, you don't have to use command line rename.

I modified your program to also put leading spaces back in.

It works fine also. See sample run at end of code.


<original code snipped>
<replaced with my version>

import os
import os.path
import string

# dirs is actually files and folders, not just folders.
dirs =  os.listdir(os.getcwd())
path = os.getcwd()
print path

for d in dirs:
    # If folder name begins with whitespace.
    if d[0] in string.whitespace:
        print d
        try:
            new_path = os.path.join(path, d.strip())
            old_path = os.path.join(path, d)
            print new_path
            print old_path
            os.renames(old_path, new_path)
        except Exception, e:
            print e

    # If folder name ends with whitespace.
    elif d[-1] in string.whitespace:
        print d
        try:
            new_path = os.path.join(path, d.strip())
            old_path = os.path.join(path, d)
            print new_path
            print old_path
            os.renames(old_path, new_path)
        except Exception, e:
            print e

    # Folder name is OK, so put spaces back in.
    else:
        if d[0] in '123':
            try:
                new_path = os.path.join(path, ' '*int(d[0])+d)
                old_path = os.path.join(path, d)
                print new_path
                print old_path
                os.renames(old_path, new_path)
            except Exception, e:
                print e

"""

D:\wstest>dir
 Volume in drive D is VOL_LOG1
 Volume Serial Number is CCB3-C62B

 Directory of D:\wstest

02/27/2006  07:38p      <DIR>          .
02/27/2006  07:38p      <DIR>          ..
02/27/2006  07:03p               1,052    3
02/27/2006  07:03p               1,052   2
02/27/2006  07:03p               1,052  1
02/27/2006  07:37p               1,344 wstest.py
               4 File(s)          4,500 bytes
               2 Dir(s)   1,007,540,736 bytes free

D:\wstest>C:\Python24\python.exe wstest.py
D:\wstest
   3
D:\wstest\3
D:\wstest\   3
  2
D:\wstest\2
D:\wstest\  2
 1
D:\wstest\1
D:\wstest\ 1

D:\wstest>dir
 Volume in drive D is VOL_LOG1
 Volume Serial Number is CCB3-C62B

 Directory of D:\wstest

02/27/2006  07:38p      <DIR>          .
02/27/2006  07:38p      <DIR>          ..
02/27/2006  07:03p               1,052 1
02/27/2006  07:03p               1,052 2
02/27/2006  07:03p               1,052 3
02/27/2006  07:37p               1,344 wstest.py
               4 File(s)          4,500 bytes
               2 Dir(s)   1,007,540,736 bytes free

D:\wstest>C:\Python24\python.exe wstest.py
D:\wstest
D:\wstest\ 1
D:\wstest\1
D:\wstest\  2
D:\wstest\2
D:\wstest\   3
D:\wstest\3

D:\wstest>dir
 Volume in drive D is VOL_LOG1
 Volume Serial Number is CCB3-C62B

 Directory of D:\wstest

02/27/2006  07:40p      <DIR>          .
02/27/2006  07:40p      <DIR>          ..
02/27/2006  07:03p               1,052    3
02/27/2006  07:03p               1,052   2
02/27/2006  07:03p               1,052  1
02/27/2006  07:37p               1,344 wstest.py
               4 File(s)          4,500 bytes
               2 Dir(s)   1,007,540,736 bytes free

"""



From scott.daniels at acm.org  Fri Feb 10 14:29:42 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Fri, 10 Feb 2006 11:29:42 -0800
Subject: is there a better way?
In-Reply-To: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
Message-ID: <43ece865$1@nntp0.pdx.net>

markscala at gmail.com wrote:
> Problem:
> 
> You have a list of unknown length, such as this: list =
> [X,X,X,O,O,O,O].  You want to extract all and only the X's.  You know
> the X's are all up front and you know that the item after the last X is
> an O, or that the list ends with an X.  There are never O's between
> X's.
> 
> I have been using something like this:
> while list[0] != O:
>     storage.append(list[0])
>     list.pop(0)
>     if len(list) == 0:
>         break
> But this seems ugly to me, and using "while" give me the heebies.  Is
> there a better approach?
> 

Your names could be better as someone mentioned.
     ex, oh = 7, 13   # for example
     data = [ex, ex, ex, oh, oh, oh, oh]
If you need a list distinct from the original:
     try:
         result = data[: data.index(oh)]
     except ValueError:
         result = list(data)

Or you could simply:
     try:
         data = data[: data.index(oh)]
     except ValueError:
         pass
and data will be either the sublist you want or the original list.

-- 
-Scott David Daniels
scott.daniels at acm.org


From cjw at sympatico.ca  Mon Feb 20 21:19:32 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Mon, 20 Feb 2006 21:19:32 -0500
Subject: number ranges
In-Reply-To: <1hb1umb.wr2hsk1chby86N%aleaxit@yahoo.com>
References: <e86a5fd00602131854s73191cbbu742d4434ad074908@mail.gmail.com>
	<1139945386.3346.38.camel@pc1.cole.uklinux.net>
	<43F8D881.5030804@sympatico.ca>
	<gfmdnZrrLeHK22TenZ2dnUVZ_tCdnZ2d@comcast.com>
	<43F97AA8.50005@REMOVEMEcyber.com.au>
	<3_WdnUP9qr9XRmTenZ2dnUVZ_sydnZ2d@comcast.com>
	<1hb1umb.wr2hsk1chby86N%aleaxit@yahoo.com>
Message-ID: <NMuKf.5613$%14.252734@news20.bellglobal.com>

Alex Martelli wrote:
> John Zenger <john_zenger at yahoo.com> wrote:
>    ...
> 
>>>for i in 2 to 5:
>>>    print i,
>>>
>>>which would print 2 3 4 5
>>
>>This proposed syntax is also easy to understand, maybe more than "..",
>>because it uses natural language.  The only criticism is that it creates
>>a list without using [] notation.  How about [2 to 5]?
> 
> 
> Having this hypothetical notation create a list (rather than a genexp)
> would qualify as a blooper of the first magnitude. Historically, 'range'
> was introduced before anything but a list was an option, so it had to be
> grandfathered in (and doesn't use any [] either, BTW), but eventually
> (in 3.0) it will return an iterator (as will methods keys/values/items
> of dicts, and so forth).
> 
> If such notation was ever to appear in Python (and it won't, in part for
> reasons I expand on below), it would surely be '(2 to 5)' and return an
> iterator equivalent to what you could get today as iter(xrange(2,5)).
> 
> 
>>>(I'm open to arguments that it should be more Pythonic and less 
>>>mathematical, and halt at 4.)
>>
>>I am also open to such arguments but it will be tough to convince me 
>>that "x to y" should mean something different from what it means in 
>>Pascal, BASIC, and English.
> 
> 
> Andrew Koenig, in "C traps and pitfalls" (a great book), did a great job
> explaining why semi-open intervals (lower bound included, upper bound
> excluded) are vastly preferable. The common sloppy practice of including
> both bounds leads to frequent "off by one" errors, also known as
> "fencepost errors", which often occur in English too -- check out the
> origin of the error's name, e.g. at
> <http://catb.org/~esr/jargon/html/F/fencepost-error.html> .
> 
> Natural language has many ambiguities and subtle error-inducing traps
> (indeed, being able to say something which means different things to
> different people may have survival value for the crafty user of
> language, so it can be argued that these traps and ambiguities are
> adaptive;-). No reason for programming languages, or other formal
> languages, to follow natural language down this destructive path.
> 
> In any case, the point is crucial: since Python will never do something
> as abysmal as introducing a closed interval rather than a semiopen one,
> the same kind of people who now long for '2 to 5' (unlikely to have
> pondered Koenig's arguments, etc) will never be happy anyway, so it's
> much better to avoid introducing '2 to 5' at all.
> 
> 
> Alex
> 
Two questions:
1. Why not treat '2 to 5' or '(2 to 5)' as a semi-open interval?
2. How could a stride be included in this notation?

Colin W.


From uche.ogbuji at gmail.com  Tue Feb  7 13:03:04 2006
From: uche.ogbuji at gmail.com (uche.ogbuji at gmail.com)
Date: 7 Feb 2006 10:03:04 -0800
Subject: XML Writer in wxPython
In-Reply-To: <16prs1hphnihj4klt3f8552p6fhsmoeg8v@4ax.com>
References: <1137083537.351635.190010@g14g2000cwa.googlegroups.com>
	<ptehs19nfushuhogq4hl1gj1ss1o1mu2u9@4ax.com>
	<1137405788.767291.175750@o13g2000cwo.googlegroups.com>
	<16prs1hphnihj4klt3f8552p6fhsmoeg8v@4ax.com>
Message-ID: <1139333099.369577.81170@g14g2000cwa.googlegroups.com>

Tim Roberts wrote re using print to generate XML:
> def PrintAddress( last, first, address, city, state, zip ):
>     print "  <address>"
>     print "    <lastname>%s</lastname>" % last
>     print "    <firstname>%s</firstname>" % first
>     print "    <address1>%s</address1>" % address
>     print "    <city>%s</city>" % city
>     print "    <state>%s</state>" % state
>     print "    <zip>%s</zip>" % zip
>     print " </address>"
>
> print "<addresses>"
> for row in addressDatabase:
>     PrintAddress( row.last, row.first,
>        row.address, row.city, row.state, row.zip )
> print "</addresses>"

Just be sure you're well aware of all the issues:

http://www.xml.com/pub/a/2002/11/13/py-xml.html

See also:

http://www.ibm.com/developerworks/xml/library/x-think35.html

--
Uche Ogbuji                               Fourthought, Inc.
http://uche.ogbuji.net                    http://fourthought.com
http://copia.ogbuji.net                   http://4Suite.org
Articles: http://uche.ogbuji.net/tech/publications/



From lormayna at gmail.com  Sat Feb 11 19:28:48 2006
From: lormayna at gmail.com (Zarathustra)
Date: 11 Feb 2006 16:28:48 -0800
Subject: Pyserial handobook
In-Reply-To: <11urs1b5gl93e1c@corp.supernews.com>
References: <1139655808.197478.64160@g43g2000cwa.googlegroups.com>
	<11urs1b5gl93e1c@corp.supernews.com>
Message-ID: <1139704128.708641.315670@g44g2000cwa.googlegroups.com>

I have just saw this site...
There is no documetation, but only examples!



From scott.daniels at acm.org  Sun Feb 12 13:06:43 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sun, 12 Feb 2006 10:06:43 -0800
Subject: How to check...
In-Reply-To: <1139660094.920792.136560@g14g2000cwa.googlegroups.com>
References: <1139660094.920792.136560@g14g2000cwa.googlegroups.com>
Message-ID: <43ef77e1$1@nntp0.pdx.net>

Lad wrote:
> Hello,
> How can I  check that a string does NOT contain NON English characters?
> Thanks
> L.
> 
If all you care about is ASCII vs. non-ASCII, you could use:
     ord(max(string)) < 128

-- 
-Scott David Daniels
scott.daniels at acm.org


From felipe.lessa at gmail.com  Sun Feb 12 06:59:10 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sun, 12 Feb 2006 09:59:10 -0200
Subject: Is python very slow compared to C
In-Reply-To: <1139743205.985196.254330@g43g2000cwa.googlegroups.com>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
	<1139743205.985196.254330@g43g2000cwa.googlegroups.com>
Message-ID: <1139745550.3967.13.camel@kenshin>

Em Dom, 2006-02-12 ?s 03:20 -0800, bonono at gmail.com escreveu:
> However, to me, the strength of python is the batteries that is
> included(and there are more and more coming).

So .NET is as good as Python? Hmmm... I think the language itself is the
best part of Python, its library is just a complement (a very good and
relevant one, though).

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From duncanm255 at hotmail.com  Fri Feb 10 19:11:04 2006
From: duncanm255 at hotmail.com (duncanm255 at hotmail.com)
Date: 10 Feb 2006 16:11:04 -0800
Subject: Socket Programming - Question
Message-ID: <1139616664.208516.254900@f14g2000cwb.googlegroups.com>

I am relatively new to Python, and wanted to see if this is even
possible, and if so how to go about implementing it.  What I'm looking
to do is create a client/server application that does the following:

1)  System2 listens on port > 1023
2)  System1 connects to System2 and sends traffic to it - based on the
traffic it receives (i.e. a special string), System2 executes
command-line commands and returns the output to System1.

An example of what I am looking to use this for is for remote virus
scanning.  So System2 listens, System1 connects and sends it the
traffic to start the scan, then System1 returns either what would be
listed in the Command Prompt window, or possibly the contents of the
logfile.

Any help would be greatly appreciated!

Doug



From stefan.rank at ofai.at  Tue Feb 28 04:19:29 2006
From: stefan.rank at ofai.at (Stefan Rank)
Date: Tue, 28 Feb 2006 10:19:29 +0100
Subject: PEP 354: Enumerations in Python
In-Reply-To: <1141109451.570616.86140@p10g2000cwp.googlegroups.com>
References: <87accdplbj.fsf@rose.polar.local>
	<1141109451.570616.86140@p10g2000cwp.googlegroups.com>
Message-ID: <440415A1.7070503@ofai.at>

on 28.02.2006 07:50 Carl Banks said the following:
> Ben Finney wrote:
>> This PEP specifies an enumeration data type for Python.
> 
[snip]
> 
> Here's why I think it's not too useful to begin with: the benefits of
> the enum you describe here are pretty weak.

I need to disagree heavily here :)

+1 from me for the general idea of a builtin enum.

(and for 'real world' use cases: I use this type of enum, the PEP one, 
in my code regularly)

> It's a pretty weak case to have a dedicated builtin to prevent
> duplicates in something that changes maybe once a month, as enums tend
> to change rather slowly.  (At least, that's the way enums in other
> languages are used, and the design you present here seems to suggest
> you intend to use them that way as well.)  And frankly, a unit test or
> assertion could check this.
[snip]

I don't understand what you mean by 'change rather slowly'?
The dominant use case for an explicit enum is to make it clear for the 
code user that the values are a separate type, and prevent errors 
occurring because the abused underlying type shows through (be it 
strings or integers) or at least give informative warnings for them. If 
you want more than that something, like a dict, will probably be better.

recent examples from this list:

2006-01-03: http://www.nabble.com/Re%3A-Regex-anomaly-p2179421.html
2006-02-20: 
http://www.nabble.com/Re%3A-Regular-expression-gone-mad-p3029028.html

> The nonsensical comparisions should throw value errors.

That's a valid point.

I hope someone knowledgeable will go through the standard library and 
check each flag-like thing (which is not directly dependent on an 
underlying c-library idiom) against the proposed enum type.

One thing that is probably missing to allow this, is a enum-set-creation 
with the | operator::

   Weekdays = enum('mon', 'tue', 'wed', 'thu', 'fri', 'sat', 'sun')
   daysihate = Weekdays.mon | Weekdays.thu

(and this discussion needs to move to python-dev ?)

As for the metaclass versions: For myself, the above version feels more 
natural and straightforward (in the same way as the PEP author describes 
it), though I understand the subclassing ideas.

But are there use cases for subclassing, that aren't better served with 
a new enum or something homegrown?
Can C++/Pascal/Java enums be subclassed?

cheers,
stefan



From scott.daniels at acm.org  Fri Feb 24 11:20:44 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Fri, 24 Feb 2006 08:20:44 -0800
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <mailman.2376.1140733288.27775.python-list@python.org>
References: <dtl9ad$35h$1@sea.gmane.org> <dtlat7$80c$1@sea.gmane.org>
	<mailman.2376.1140733288.27775.python-list@python.org>
Message-ID: <43ff30b8$1@nntp0.pdx.net>

Paul Probert wrote:
> Yes, I'm doing this:
>           .....
>          oldtime=time.time()
>          time.sleep(1)
>          newtime=time.time()
>          dt=newtime-oldtime
>           if dt > 2:
>               print 'dt=',dt,' time=',time.strftime('%Y_%m_%d_%Hh_%Mm_%Ss')
> Its happening roughly 4 times a day total on our 20 machines, ie about 
> once every 5 days on a given machine.

Well, you have a guess about the time updates that may well tell you
all.  Because of that guess, you might want to try:

           oldtime = time.time()
           time.sleep(1)
           newtime = time.time()
           delta = newtime - oldtime
           if not .5 < delta < 2:
               print 'delta=%s, from=%s, time=%s' % (
                   delta, time.strftime('%Y_%m_%d_%Hh_%Mm_%Ss',
                                        time.gmtime(oldtime)),
                   time.strftime('%Y_%m_%d_%Hh_%Mm_%Ss',
                                        time.gmtime(newtime)))

to see if you get time running backwards as well.

--Scott David Daniels
scott.daniels at acm.org


From onurb at xiludom.gro  Tue Feb 28 04:05:00 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Tue, 28 Feb 2006 10:05:00 +0100
Subject: Python Indentation Problems
In-Reply-To: <1141021286.047172.278030@z34g2000cwc.googlegroups.com>
References: <1141021286.047172.278030@z34g2000cwc.googlegroups.com>
Message-ID: <44041204$0$3199$636a55ce@news.free.fr>

diffuser78 at gmail.com wrote:
> I am a newbie to Python. I am mainly using Eric as the IDE for coding.
> Also, using VIM and gedit sometimes.
> 
> I had this wierd problem of indentation. My code was 100% right but it
> wont run because indentation was not right. 

If indentation is not right, then your code is not 100% right !-)

> I checked time and again
> but still no success. I rewrote the code over again in VI and it ran.
> 
> Can you please explain whats the trick behind the correct indentation.

1/ use spaces not tabs. Hint : all decent code editors I know have a way
to configure this - just make sure all the editors you use have the
correct settings.
2/ preferably, stick to 4 spaces indent
3/ if you run into troubles, check the code with tabnanny:
http://effbot.org/librarybook/tabnanny.htm


> Thanks
> 


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From steve at holdenweb.com  Wed Feb  8 16:02:27 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 08 Feb 2006 16:02:27 -0500
Subject: module with __call__ defined is not callable?
In-Reply-To: <slrnduk07b.117.apardon@rcpc42.vub.ac.be>
References: <mailman.1580.1139367500.27775.python-list@python.org>	<pan.2006.02.08.10.21.24.46790@REMOVETHIScyber.com.au>	<1139394463.255902.168960@f14g2000cwb.googlegroups.com>	<mailman.1591.1139400885.27775.python-list@python.org>
	<slrnduk07b.117.apardon@rcpc42.vub.ac.be>
Message-ID: <dsdm94$v43$1@sea.gmane.org>

Antoon Pardon wrote:
> Op 2006-02-08, Steve Holden schreef <steve at holdenweb.com>:
> 
>>Why should a module be callable? What's the advantage? Should we be able 
>>to add two modules together, yielding a module that contains all the 
>>code of both modules? What happens if I multiply a module by two - 
>>presumably the result should be the same as adding a module to itself? 
>>Perhaps we should be able to divide a module by a function?
>>
>>The pursuit of orthogonality, while admirable, can lead to insanity if 
>>pushed too far.
> 
> 
> This is not an argument. This doesn't give a clue about where to stop
> this pursuit en when to go on.
> 
Well, let's say we should stop short of unsane behavior. That's a phrase 
you should understand.

> Whether it is usefull to call modules add them or multiply them by two
> is up to the person producing the code. That is no different than when
> he decides it is usefull to call certain objects, add them or multiply
> them by two.
> 
> I can understand there are implemenation details that make it not
> worth while to implement this. But otherwise I would think it
> a bad reason to give up orthogonality just because one can't imagine
> what it could be usefull for.
> 
Fine. Off you go, then.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From apgwoz at gmail.com  Mon Feb 13 14:28:45 2006
From: apgwoz at gmail.com (Andrew Gwozdziewycz)
Date: Mon, 13 Feb 2006 14:28:45 -0500
Subject: trapping errors in function call syntax
In-Reply-To: <dsqmab$98v$1@sea.gmane.org>
References: <m8m1v1h8ae545nsqbl777plviddc94vsdd@4ax.com>
	<dsqmab$98v$1@sea.gmane.org>
Message-ID: <8ba244fb0602131128g13c08973h72969ca0f307937f@mail.gmail.com>

While we're at it... Can someone point me to either an old post, or
documentation about tuple expansion with * ? I recently saw it used
and was shocked as i had no clue what it really did. I didn't know it
could be used outside of function definitions.

On 2/13/06, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Avi Kak wrote:
>
> > Suppose I write a function that I want to be called
> > with ONLY keyword argumnts, how do I raise an
> > exception should the function get called with
> > what look like position-specfic arguments?
>
> here's one way to do it:
>
> >>> def func(*args, **kw):
> ...     def myrealfunc(a=1, b=2, c=3):
> ...             print a, b, c
> ...     if args:
> ...             raise TypeError("invalid call")
> ...     return myrealfunc(**kw)
> ...
> >>> func(1)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "<stdin>", line 5, in func
> TypeError: invalid call
> >>> func(a=3)
> 3 2 3
> >>> func()
> 1 2 3
>
> here's another one:
>
> >>> def func(dummy=None, a=1, b=2, c=3):
> ...     if dummy is not None:
> ...             raise TypeError("invalid call")
> ...     print a, b, c
>
> (but this is easier to trick).
>
> hope this helps!
>
> </F>
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


--
Andrew Gwozdziewycz <apgwoz at gmail.com>
http://ihadagreatview.org
http://plasticandroid.org


From mrstephengross at hotmail.com  Tue Feb 21 12:03:58 2006
From: mrstephengross at hotmail.com (mrstephengross)
Date: 21 Feb 2006 09:03:58 -0800
Subject: Is there a way to build python without 'posixmodule' ?
Message-ID: <1140541438.511237.292410@g14g2000cwa.googlegroups.com>

I'm working on building python 2.4.2 with the mingw compiler (on
cygwin). It runs into problems with Modules/posixmodule.c, because the
mingw compiler does *not* provide complex process management
functionality. I can exclude posixmodule.c from the python build
process, but gcc still fails when it tries to link together the python
executable:

(Error message follows)
=================================
gcc -mno-cygwin  -Wl,--out-implib=libpython2.4.dll.a -o python.exe \
                Modules/python.o \
                libpython2.4.a    -lm
libpython2.4.a(pystate.o)(.text+0x1e0): In function
`PyThreadState_New':
C:/cygwin/home/Administrator/sgross/sage/installer/python/i386-mingw-gcc/Python-2.4.2/Python/pystate.c:191:
undefined reference to `_PyGILState_NoteThreadState'
===================================

It would seem that the python executable is looking for the process
management functionality that *would* have been supplied by
posixmodule.o.

Is there a way around this? Can I build the python executable without
building posixmodule.o?

Thanks,
--Steve (mrstephengross at hotmail.com)



From kent at kentsjohnson.com  Sat Feb 25 10:47:51 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Sat, 25 Feb 2006 10:47:51 -0500
Subject: Import in a separate thread
In-Reply-To: <1140869286.548125.17710@p10g2000cwp.googlegroups.com>
References: <1140869286.548125.17710@p10g2000cwp.googlegroups.com>
Message-ID: <44007794$1_2@newspeer2.tds.net>

cyberco wrote:
> I want to import a long list of modules in a separate thread to speed
> things up. How can I make the modules imported in that separate thread
> accessible outside the method?
> 
> ===========================
> import os
> 
> # import rest in a separate thread
> def importRest():
>     import audio
>     import socket
> thread.start_new_thread(importRest,())
> 
> # audio.somemethod()  would fail here
> ===========================
> 

Just import the modules again when you need to use them - modules are 
cached, only the initial import is expensive.

Of course this won't help if you don't have something else to do (like 
wait for the user) while the threaded imports happen.

Another helpful technique is to put imports inside the functions that 
need them. If every module imports the modules it needs at global scope, 
then when the first module loads it will trigger importing of the whole 
program and all needed library modules. If this is expensive, you can 
break up the loads by putting key imports into functions instead of at 
global scope.

Note to the doubters - I have used these techniques in Jython programs, 
where importing java packages can be noticably slow.

Kent


From gabriel.barros at gmail.com  Tue Feb 21 14:11:45 2006
From: gabriel.barros at gmail.com (Gabriel B.)
Date: Tue, 21 Feb 2006 16:11:45 -0300
Subject: warning for google api users
Message-ID: <5175a81c0602211111v6408b359u94ccfa63691fdc3c@mail.gmail.com>

the google webservices (aka google API) is not even close for any kind
of real use yet

if you search for the same term 10 times, you get 3 mixed totals. 2
mixed result order. and one or two "502 bad gateway"

i did an extensive match agains the API and the regular search
service. the most average set of results:

results 1-10; total: 373000
results 11-20; total: 151000
results 21-30; total: 151000
results 31-40; total: 373000
results 41-50; total: 373000
results 51-60; total: 373000
results 61-70; total: 151000
( 502 bad gateway. retry)
results 71-80; total: 373000
results 81-90; total: 151000
( 502 bad gateway. retry)
results 91-100; total: 373000

on the regular google search, total:  2,050,000 (for every page, of
course)

besides that, the first and third result on the regular google search,
does not apear in the 100 results from the API in this query, but this
is not average, more like 1 chance in 10 :-/

So, no matter how much google insists that this parrot is sleeping,
it's simply dead.


now, what i presume that is happening, is that they have a dozen of
machine pools, and each one has a broken snapshot of the production
index (probably they have some process to import the index and or it
explode in some point or they simply kill it after some time). and
they obviously don't run that process very often.

Now... anyone has some implementation of pygoogle.py that scraps the
regular html service instead of using SOAP? :)

Gabriel B.


From blair.houghton at gmail.com  Thu Feb  2 20:00:26 2006
From: blair.houghton at gmail.com (Blair P. Houghton)
Date: 2 Feb 2006 17:00:26 -0800
Subject: OO conventions
In-Reply-To: <43E13F39.2070709@freenet.de>
References: <mailman.1334.1138833641.27775.python-list@python.org>
	<43E13F39.2070709@freenet.de>
Message-ID: <1138928426.867847.66790@g44g2000cwa.googlegroups.com>

Image would be a superclass to JPGImage, BMPImage, PNGImage, etc...

But which to use could only be determined AFTER opening the file,
because "file.jpg" doesn't have type JPG, it has type string and
semantic value "maybe a jpeg file or maybe something misnamed as a jpeg
file".

So Image.open(filename) seems right as a factory function that opens
the file, figures out what it really is, constructs the appropriate
subclass object (likely by passing a string to the constructor, e.g.,
JPGImage(filename)), and returns the object via the superclass type.
The caller can then either check a flag in the superclass to see what
type the subclass is, or just assume it's the right type of image for
the filename extension (or does Python have RTTI? I don't recall if
I've seen it, yet...).

Though if the filename doesn't match the content, someone should raise
an exception...

But this means that Image.open(filename) is a static method of the
superclass, not requiring instantiation.  Image(string) could easily
default to assuming string is a filename, doing the same work as
Image.open(filename), though it would at least partially construct an
Image instance each time it's called, which isn't what you want.
Image.open(filename) defined as a static method (wait...is that
possible in Python? I hate being the newbie) would not do any
constructing until after it knew what to construct.

--Blair



From ronnyma at math.uio.no  Fri Feb 17 19:09:22 2006
From: ronnyma at math.uio.no (Ronny Mandal)
Date: Sat, 18 Feb 2006 01:09:22 +0100
Subject: Class subscripting
Message-ID: <g3pcv1dj2ei00kf05rjdki0e6poo2favo2@4ax.com>

Assume we have a class Foo, and instance called bar.

a variable called baz1 has the value 3.0, baz2 is uninitialized

Is there a way of reflecting the variable with such syntax:

print bar[<var_index>], where var_index is a number representing
internal index.

bar[<var_index>] = 4.2. #Setting baz2 to 4.2

Thanks and regards,

Ronny Mandal


From skip at pobox.com  Mon Feb 13 21:55:40 2006
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 13 Feb 2006 20:55:40 -0600
Subject: Python 2.4.2 and Berkeley DB 4.4.20 ?
In-Reply-To: <1139874754.693654.229830@o13g2000cwo.googlegroups.com>
References: <1139874754.693654.229830@o13g2000cwo.googlegroups.com>
Message-ID: <17393.18092.824531.682804@montanaro.dyndns.org>


    Damjan> This is from the Slackware-current changelog:
    Damjan> d/python-2.4.2-i486-1.tgz: Upgraded to python-2.4.2.
    Damjan>        The bsddb module didn't build against the new 4.4.x
    Damjan>        version of Berkeley DB. Does anyone care? Or perhaps have
    Damjan>        a patch? :-)

    Damjan> Does anyone have a suggestion?

This was checked into Subversion recently:

    Revision 42169 - (view) (download) (as text) - [select for diffs] 
    Modified Tue Jan 24 09:46:48 2006 UTC (2 weeks, 6 days ago) by gregory.p.smith 
    File length: 149390 byte(s) 
    Diff to previous 42093
    Support for BerkeleyDB 4.4 (tested against 4.4.20 as well as all the
    way back thru 3.2).  This should be backported to the release24-maint
    branch.

and

    Revision 42170 - (view) (download) (as text) - [select for diffs] 
    Modified Tue Jan 24 10:02:02 2006 UTC (2 weeks, 6 days ago) by gregory.p.smith 
    File length: 142926 byte(s) 
    Diff to previous 41922
    backport of commit 42169

    adds support for compiling against BerkeleyDB 4.4.x

Skip


From ptmcg at austin.rr._bogus_.com  Tue Feb  7 14:26:00 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Tue, 07 Feb 2006 19:26:00 GMT
Subject: Object Oriented vs Pythonic Code, and Pythonic standards
References: <mailman.1561.1139337813.27775.python-list@python.org>
Message-ID: <cv6Gf.25163$jO.7874@tornado.texas.rr.com>

"Carl J. Van Arsdall" <cvanarsdall at mvista.com> wrote in message
news:mailman.1561.1139337813.27775.python-list at python.org...
> It seems the more I come to learn about Python as a langauge and the way
> its used I've come across several discussions where people discuss how
> to do things using an OO model and then how to design software in a more
> "Pythonic" way.
>
> My question is, should we as python developers be trying to write code
> that follows more of a python standard or should we try to spend our
> efforts to stick to a more traditional OO model?
>
> For example, in C++ I might make a file that defines a class and all its
> methods, at which point I create an object and do things with it.  My
> interpretation of what is "Pythonic" would be instead of creating a
> class I would just define functions and maybe some variables global to a
> module.  At this point, I import the module and just make function calls.
>
> There are many similarities here, but the difference is that in python I
> don't feel as though I would define a class, I would just treat the
> python module as a class instead, especially if it was a type of object
> that I would only need a single instance of.
>
This is only the case if you are using classes in C++ just to organize
functions into an object, treating the class primarily as a namespace.  If
all of your methods are static to the class, or if your program only
instantiates a single object and then uses it as the accessor to the
contained methods, then you might as well just declare these globally in a
module, as you have described.  (If you are porting from Java, this is
especially possible, even likely, since the class-zealotry of Java's design
foists the class structure on all code, whether it is suitable or not.)

However, if your application organizes itself into granular objects, along
the lines of many established OO design techniques/patterns, then by all
means, use Python's class definition capabilities, and implement your class
much as you describe doing so in C++.

Note, however, that much of the "traditional OO model" conventional wisdom
is born of C++ and Java's type-static nature.  The penchant for
interface-based design, for example, is enabled and abetted by those
languages' compile-time verification of the implementation of abstract
methods in deriving classes - Python has no such feature.  Instead, Python
objects are verified for method implementation at run-time, by the direct
technique of calling the method, and raising an exception if it is not
found.  This is not to say that interfaces have no place in Python design or
programming, they simply are not enforced by the compiler/interpreter.
Other techniques found in resources such as "Effective C++", an excellent
book by Scott Meyers, have much more to do with coping with C++ memory
management and type-rigidity, and less to do with OO concepts.  Things like
<auto_ptr>, or Meyers' envelope-letter idiom, are just non-issues in Python,
although they take up volumes of explanation for C++ users.

Conversely, the amorphism of Python objects, such as the ability to
dynamically (even casually) "hang" new attributes on an existing object,
without prior definition, is nearly unknown in the C++ and Java worlds, and
not without significant contortions.  This one feature alone enables
entirely different approaches to object modeling, and permits the creation
of new design patterns that are especially suited for Python.  (I almost
termed this aspect as "Python-unique", but I think this would probably show
my ignorance of similar features in languages such as Haskell or Lua.)

The traditional OO concepts that are associated with dynamic/run-time
type-checked languages such as SmallTalk are probably more directly
translatable to Python.  But even in SmallTalk, *all* code must be
implemented within the context of a class.  And the implementations of those
concepts can also be much lighter-weight in Python, than they need be in
C++.

This topic is also covered in some detail in the two blog entries: "Python
is not Java" (http://dirtsimple.org/2004/12/python-is-not-java.html), and,
"Java is not Python, either"
(http://dirtsimple.org/2004/12/java-is-not-python-either.html).

> The second question that arises from Pythonism is, has the community
> drafted a standard for quality "Pythonic" code?
>
There is a PEP for this, I think it's PEP8.  But I believe these are more
"guideline"-level recommendations, not "standards".

-- Paul




From steve at REMOVETHIScyber.com.au  Fri Feb 24 04:42:23 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 24 Feb 2006 20:42:23 +1100
Subject: "Temporary" Variable
References: <1140665472.203495.7570@g44g2000cwa.googlegroups.com>
	<43FD6645.3020201@REMOVEMEcyber.com.au>
	<1140725159.143882.202630@j33g2000cwa.googlegroups.com>
	<pan.2006.02.23.22.19.38.642977@REMOVETHIScyber.com.au>
	<ZmsLf.21067$915.1256@southeast.rr.com>
Message-ID: <pan.2006.02.24.09.42.22.818116@REMOVETHIScyber.com.au>

On Fri, 24 Feb 2006 00:24:25 +0000, Jeffrey Schwab wrote:

> Steven D'Aprano wrote:
>> On Thu, 23 Feb 2006 12:05:59 -0800, darthbob88 wrote:
>> 
>> My comments inserted inline.
>> 
>> 
>> 
>>>#!/usr/bin/python
>>>#simple guessing game, with numbers
>>>import random
>>>spam = random.randint(1, 100)
>> 
>> 
>> It is bad programming practice to give variables uninformative joke names.
> 
> Lighten up.  This isn't the middle of a 100-KLOC corporate monstrosity, 
> it's a 1/2-page usenet post.

The original poster is also a newbie who was having trouble with the
difference between strings and ints. If Guido called a variable spam,
I wouldn't presume to correct him. When Newbie McNew does it, it might
very well be because he doesn't know any better.

Just out of curiosity, when do you think is the right time to begin
teaching programmers good practice from bad? Before or after they've
learnt bad habits?



-- 
Steven.



From larry.bates at websafe.com  Mon Feb 20 19:24:08 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 20 Feb 2006 18:24:08 -0600
Subject: Newbie question: Multiple installations of Python on Windows
	machines
In-Reply-To: <mailman.2185.1140472875.27775.python-list@python.org>
References: <mailman.2185.1140472875.27775.python-list@python.org>
Message-ID: <2uqdnZNikuo-wGfenZ2dnUVZ_t6dnZ2d@comcast.com>

Don Taylor wrote:
> I have Python 2.4.2 installed on a Windows XP machine.
> 
> There is an application that I want to use that refuses to install
> unless I have Python 2.3.x installed.  (The only way that I can install
> this is to use it's .exe installer)
> 
> Can I install two versions of Python on Windows, and if so is there
> something I should do to make sure that the right version is used at the
> right time?  (2.3.x with this one package, and 2.4.2 with everything else).
> 
> Thanks,
> 
> Don.
> 
You can but it is kind of tricky.  You must control the PYTHONPATH environment
variable so that it points to the correct paths for the version of python
you are running.  You also will need to fully qualify the call to run
python (e.g. C:\Python23\python yourprogram.py).

I've had this working but if there is ANY way to run the other program on
another computer I would (so as to not mess up 2.4.2 install).

-Larry


From cjw at sympatico.ca  Tue Feb 21 19:42:00 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Tue, 21 Feb 2006 19:42:00 -0500
Subject: number ranges
In-Reply-To: <1hb3o4u.trzcp41f11vxqN%aleaxit@yahoo.com>
References: <e86a5fd00602131854s73191cbbu742d4434ad074908@mail.gmail.com>
	<1139945386.3346.38.camel@pc1.cole.uklinux.net>
	<43F8D881.5030804@sympatico.ca>
	<gfmdnZrrLeHK22TenZ2dnUVZ_tCdnZ2d@comcast.com>
	<43F97AA8.50005@REMOVEMEcyber.com.au>
	<3_WdnUP9qr9XRmTenZ2dnUVZ_sydnZ2d@comcast.com>
	<1hb1umb.wr2hsk1chby86N%aleaxit@yahoo.com>
	<NMuKf.5613$%14.252734@news20.bellglobal.com>
	<1hb2uq1.e7kdkt1z0ge4rN%aleaxit@yahoo.com>
	<43FAD679.2040305@REMOVEMEcyber.com.au>
	<1hb3o4u.trzcp41f11vxqN%aleaxit@yahoo.com>
Message-ID: <jrOKf.1840$XZ3.159923@news20.bellglobal.com>

Alex Martelli wrote:
> Steven D'Aprano <steve at REMOVEMEcyber.com.au> wrote:
>    ...
> 
>>>Reread the part I quoted above: at least some of the proponents of this
>>>syntax appear to be totally ignorant of 30 years of literature and
>>>practice of programming, "it will be tough to convince" them that closed
>>>intervals are a terrible mistake and semi-open ones the only way to go.
>>
>>I intellectually understand that semi-open intervals 
>>are the only way to go. But reading the words, the part 
>>of my brain that speaks English cries out for a closed 
>>interval. Bad brain.
> 
> 
> Human brain -- it's harder for non-native-speakers like me to judge the
> associations of certain English words in a native speaker's brain.
> 
> 
>>Given the overwhelming benefit of semi-closed 
>>intervals, I wish to amend my proposal to follow Alex's 
>>suggestions, namely:
>>
>>for i in (1 to 10 by 3):
>>     print i
>>
>>should print 1 4 7.
> 
> 
> But that would be an "attractive nuisance" to many other native speakers
> like you, who would instinctively think of a closed interval.  Maybe
> 'upto' rather than 'to', as somebody else suggested, would ease that.
> 
> 
>>That would make (a to b by c) equivalent to 
>>range(a,b,c) except that it returns an iterator rather 
>>than a list. Hmmm... putting it that way, the new 
>>syntax actually costs 1 keystroke, or saves 1 if you 
>>put spaces after the commas in the range expression. 
>>Does it add enough clarity and ease of understanding to 
>>justify two new keywords?
> 
> 
> No, of course not.  And if we use upto, we'll need a downto as well, a
> third keyword, for loops with negative step.  range should return an
> iterator in Python 3.0 (maybe in 2010?-) and xrange will then go away,
> so the only issue is whether syntax sugar for it is SO badly needed as
> to justify 2/3 new keywords.
> 
> 
>>>whines about it); Python is clearly much better off if such people run
>>>away to Ruby, with its (expletive deleted) a..b AND a...b syntaxes just
>>>to ensure maximum confusion;-).
>>
>>Ruby uses both .. and ...? Now I'm frightened.
> 
> 
> I _like_ Ruby, mostly, but yes, it has both a..b AND a...b, one of them
> to indicate a semi-open interval and the other to indicate a closed one
> (I believe the three dots are for the semi-open, but it could be the
> other way 'round) -- I don't remember how it indicates a step. I do
> think this is a wart (lack of visual or mnemonic distinction), though
> I'm sure Ruby enthusiasts would not agree.
> 
> 
> Alex
http://www.ruby-doc.org/docs/ProgrammingRuby/
It seems that .. and ... are Range class constructors.

Range.new(a, b, exclusive= True) is equivalent to Python's range(a, b) 
i.e. Ruby's  a...b

There appears to be no provision for a stride.

Ruby's choice between .. and ... seems a little perverse.  I would 
expect '...' to deliver a little more than '..'.

I guess one could consider Python's range() as a constructor for the 
List class.

Steven D'Aprano suggested that 1 to 10 by 3 should create an iterator.
What are the benefits of this as compared with a Python List?

Could we not have 1 ... 10 ... 3 to mean the same thing and then there 
would be no need for extra reserved words?

Colin W.


From usenet at DavidFilmer.com  Tue Feb  7 19:32:16 2006
From: usenet at DavidFilmer.com (usenet at DavidFilmer.com)
Date: 7 Feb 2006 16:32:16 -0800
Subject: Xah's Edu Corner: Unix damage: color names
References: <1133844932.007824.26780@g43g2000cwa.googlegroups.com>
	<1134780763.066592.45390@g49g2000cwa.googlegroups.com>
	<1135405908.381150.133190@o13g2000cwo.googlegroups.com>
	<1136236586.734775.212440@f14g2000cwb.googlegroups.com>
	<1137784561.589887.58380@o13g2000cwo.googlegroups.com>
	<1139356437.987319.59280@g14g2000cwa.googlegroups.com>
Message-ID: <1139358736.901080.243350@f14g2000cwb.googlegroups.com>

Xah Lee wrote:
> usually located in <X11root>/lib/rgb.txt.

on AIX and Linux (SuSE 9.3) the file is in <X11root>/lib/X11/rgb.txt

> neither a continuity in selected color values nor in color names (for
> example, darkgray but lightgrey)

On AIX and Linux (SuSE 9.3) each color name which contains "gray" is
also aliased as "grey" for the benefit of both Yanks and Brits.  Thus,
I have:

   211 211 211             LightGrey
   211 211 211             LightGray

   169 169 169             DarkGrey
   169 169 169             DarkGray

I'm curious what UNIX system does not dual-spell this color? (neutral,
actually; gray is not a color). I thought these color (neutral) names
were dual-homed on all reasonably modern UN*X systems.

-- 
http://DavidFilmer.com



From claird at lairds.us  Fri Feb 10 14:08:02 2006
From: claird at lairds.us (Cameron Laird)
Date: Fri, 10 Feb 2006 19:08:02 GMT
Subject: Tkinter, X-windows and ebay
References: <1tqdncP3Ps7s6XfenZ2dnUVZ_tGdnZ2d@nmt.edu>
	<3bidnfcf041EVXHeRVn-gA@nmt.edu>
	<7xacczt8u4.fsf@ruckus.brouhaha.com>
	<vZKdnfz889_-T3HeRVn-tw@nmt.edu>
Message-ID: <tf2vb3-8p5.ln1@lairds.us>

In article <vZKdnfz889_-T3HeRVn-tw at nmt.edu>,
Bob Greschke <bob at passcal.nmt.edu> wrote:
>
>"Paul Rubin" <http://phr.cx at NOSPAM.invalid> wrote in message 
>news:7xacczt8u4.fsf at ruckus.brouhaha.com...
>> "Bob Greschke" <bob at passcal.nmt.edu> writes:
>>> What I came up with was the user can just create a text file (a kind
>>> of a transaction log of what things were done to the copy of the
>>> database on his machine), then cut and paste that text into a window
>>> created on their machine by the main database program (using
>>> X-windows, ssh, etc.), then the main program can read the contents
>>> of that text field and update the main copy of the database.
>>>
>>> It should work. :)
>>
>> Yuck!  Why not use an http interface instead of the remote tkinter
>> interface?  Then the user would interact with your app through a web
>> browser, giving a familiar UI as well as giving that upload button
>> (which tells the browser to upload the file).
>
>Mainly because the user may be in the middle of the Himalayas trying to 
>create paperwork for equipment being shipped to Japan and Chile.  The 
>Internet is not always an option in our line of work.  We need to have 
>standalone everythings.  We don't live in your real world. :)
>
>The two databases (the one on the user's laptop, and the one back at the 
>office) don't need to be reconciled until the user gets back.  We just need 
>to (eventually) know which pieces of equipment were sent to Japan, and which 
>went to Chile.
			.
			.
			.
Certainly.  And, if you're content with what you have, that's
great; *I* certainly do enough funny things with Tkinter and 
X.  But what you *can* do is deploy the end-user desktop with
a browser pointed to a local Web page, presumably one with 
enough client-side processing to prepare a form.  Then, when
he's within range of an IP address, he selects an "upload"
link, and you get all the HTTP-related advantages Paul and
others have mentioned.


From rainbow.cougar at gmail.com  Sun Feb 12 13:44:02 2006
From: rainbow.cougar at gmail.com (rainbow.cougar at gmail.com)
Date: 12 Feb 2006 10:44:02 -0800
Subject: problem with opening Python IDLE
In-Reply-To: <mailman.1554.1139330116.27775.python-list@python.org>
References: <mailman.1554.1139330116.27775.python-list@python.org>
Message-ID: <1139769841.958504.8270@f14g2000cwb.googlegroups.com>


Bennie Tilma wrote:
> I'm having trouble with opening the python IDLE-program. When I try to start
> it, it gives an errormessage wich states that it can not make a connection,
> possibly because of a firewall. However, adding it to firewalls exeptions or
> even disabeling the firewall has no effect.
>

You have to have your network's internal loopback turned on:


Python 2.4.2 (#1, Dec  5 2005, 23:05:02)
[GCC 3.4.2 [FreeBSD] 20040728] on freebsd5
Type "copyright", "credits" or "license()" for more information.

    ****************************************************************
    Personal firewall software may warn about the connection IDLE
    makes to its subprocess using this computer's internal loopback
    interface.  This connection is not visible on any external
    interface and no data is sent to or received from the Internet.
    ****************************************************************
    
IDLE 1.1.2      
>>>



From nyamatongwe+thunder at gmail.com  Sat Feb 11 20:42:58 2006
From: nyamatongwe+thunder at gmail.com (Neil Hodgson)
Date: Sun, 12 Feb 2006 01:42:58 GMT
Subject: Yet another GUI toolkit question...
In-Reply-To: <43EE1817.7050702@wordtech-software.com>
References: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
	<mailman.1743.1139664790.27775.python-list@python.org>
	<43EE1817.7050702@wordtech-software.com>
Message-ID: <CowHf.5887$yK1.3347@news-server.bigpond.net.au>

Kevin Walzer:

> Do these screenshots look "non-native" to you?
> 
> http://www.wordtech-software.com/ireveal-mac.png

    Yes. I don't use a Mac much but the following are really obvious. 
The column header icons don't fit within the header. The scroll bar is 
squished up too thin. The icons are from Windows.

> http://www.wordtech-software.com/ireveal-windows.png

    Yes. The archetype here is Windows XP Explorer. Icons too large. 
Icons jaggy due to lack of alpha compositing. Icon text too long but no 
label for entry field. Weird discontinuity between toolbar and list. 
List header too tall. List has alternating background. Status bar not 
indented. No resize indicator in status bar. Line between columns. 
Vertical scroll bar ends at bottom of horizontal scroll bar rather than 
top. Scroll bars use dithered background rather than graduated smooth 
background.

> http://www.wordtech-software.com/ireveal-linux.png

    Totally native. If you are still using a 10 year old desktop 
environment.

    Neil


From sjdevnull at yahoo.com  Tue Feb 28 12:48:18 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 28 Feb 2006 09:48:18 -0800
Subject: Python and Flash
In-Reply-To: <1141136533.215656.290800@i39g2000cwa.googlegroups.com>
References: <1139230361.675896.241920@z14g2000cwz.googlegroups.com>
	<1139235297.903689.244030@z14g2000cwz.googlegroups.com>
	<1139407620.948877.5820@g14g2000cwa.googlegroups.com>
	<1141101898.725832.104260@e56g2000cwe.googlegroups.com>
	<1141102008.086764.24550@j33g2000cwa.googlegroups.com>
	<slrne0824e.9s8.sybrenUSE@schuimige.unrealtower.org>
	<1141136533.215656.290800@i39g2000cwa.googlegroups.com>
Message-ID: <1141148898.785490.44080@j33g2000cwa.googlegroups.com>

SamFeltus wrote:
> I aint a professional coder, but a gardener.  However, the
> Flash->JSON->Python technique works.  It is poorly coded, but it is IMO
> a very simple way to integrate Flash and Python compared to the methods
> normally suggested on the net.
>
> The HTML is just some junk thrown up for people with lower tech
> browsers without much thought or consideration.

Some people with high-tech browsers don't use Flash for non-technical
reason.  The audit clauses in the license allow Macromedia to audit
your computers for license compliance at any time, so some companies
that feel strongly about their data staying away from prying eyes won't
allow it to be installed.  It's illegal to install Flash on some
versions of Windows, let alone more esoteric operating systems.  Using
the version bundled with IE may skirt some of these issues, I'm not
sure.

see http://www.macromedia.com/shockwave/download/license/desktop/
especially 2(b) and 3(a).



From tuvas21 at gmail.com  Tue Feb 21 17:11:37 2006
From: tuvas21 at gmail.com (Tuvas)
Date: 21 Feb 2006 14:11:37 -0800
Subject: Module question
Message-ID: <1140559897.172126.43820@o13g2000cwo.googlegroups.com>

I know this is probably a very simple question, but I am building a
program that is now at about 2400 lines of code in the main module. I
need to break it up, however, there are certain variables that I would
like to use among all of them, namely the TKinter background. It's
build using tkinter, so, to do anything useful requires having the
master=Tk() variable portable in every interface. I can't just pass
this variable, the real way to do it is to have a global variable. How
can I do this? Thanks!



From roccomoretti at hotpop.com  Tue Feb 21 15:14:24 2006
From: roccomoretti at hotpop.com (Rocco Moretti)
Date: Tue, 21 Feb 2006 14:14:24 -0600
Subject: That's really high-level: bits of beautiful python
In-Reply-To: <ZpSdnRUPhtMP-WbenZ2dnUVZ_sSdnZ2d@is.co.za>
References: <ZpSdnRUPhtMP-WbenZ2dnUVZ_sSdnZ2d@is.co.za>
Message-ID: <dtfsau$q8$1@news.doit.wisc.edu>

Max wrote:

> But today we were discussing the problem of running externally-provided 
> code (e.g. add-on modules). Neither of us knew how to do it in C, though 
> I suggested using DLLs. However, I quickly installed python on his 
> laptop and coded this:
> 
> exec "import %s as ext_mod" % raw_input("Module: ")
> ext_mod.do()

Be careful with this - its fine for developer only use, but I'd avoid it 
in production code. You leave the possibility for hackers to try to 
import the module named 'os; os.system('rm -rf /'); import', or other 
such deviousness.

Probably a better version:

ext_mod_name = raw_input("Module: ")
ext_mod = __import__(ext_mod_name, globals(), locals(), ['__dict__'])
ext_mod.do()

But granted, it's less cool than the original.

P.S. The ", globals(), locals(), ['__dict__']" is there so that the 
proper thing is done when you provide the code with a dotted module name.


From chasonh at hotmail.com  Mon Feb  6 11:48:34 2006
From: chasonh at hotmail.com (Chason Hayes)
Date: Mon, 06 Feb 2006 16:48:34 GMT
Subject: Literal Escaped Octets
References: <pan.2006.02.06.04.50.15.325558@hotmail.com>
	<1hab1ag.1g7oxkb1pw7a20N%aleaxit@yahoo.com>
Message-ID: <pan.2006.02.06.16.58.23.559253@hotmail.com>

On Sun, 05 Feb 2006 21:07:23 -0800, Alex Martelli wrote:

> Chason Hayes <chasonh at hotmail.com> wrote:
>    ...
>> easily in c/c++ but I need to do it in python. I am not sure how to read
>> and evaluate the binary value of a byte in a long string when it is a non
>> printable ascii value in python.
> 
> If you have a bytestring (AKA plain string) s, the binary value of its
> k-th byte is ord(s[k]).
> 
> 
> Alex

Thank you very much, That is the function that I was looking for to write
a filter.

Chason



From noway at sorry.com  Mon Feb 27 01:09:35 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Mon, 27 Feb 2006 06:09:35 GMT
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<1141019214.153904.115220@j33g2000cwa.googlegroups.com>
Message-ID: <zIwMf.9924$PR2.201420@twister2.libero.it>

Kay Schluehr wrote:

>> The enumerations specified in this PEP are instances of an ``enum``
>> type.  Some alternative designs implement each enumeration as its own
>> class, and a metaclass to define common properties of all
>> enumerations.
>>
>> One motivation for having a class (rather than an instance) for each
>> enumeration is to allow subclasses of enumerations, extending and
>> altering an existing enumeration.  A class, though, implies that
>> instances of that class will be created; it is difficult to imagine
>> what it means to have separate instances of a "days of the week"
>> class, where each instance contains all days.  This usually leads to
>> having each class follow the Singleton pattern, further complicating
>> the design.
>>
>> In contrast, this PEP specifies enumerations that are not expected to
>> be extended or modified.  It is, of course, possible to create a new
>> enumeration from the string values of an existing one, or even
>> subclass the ``enum`` type if desired.
>
> Maybe a metaclass implementation complicates design, but usage is
> quite simple and flexible. The classics is already referenced by the
> Python docs:
>
> http://www.python.org/doc/essays/metaclasses/Enum.py

Agreed. Allowing subclassing of an existing enum is a strong plus to me.
-- 
Giovanni Bajo




From kay.schluehr at gmx.net  Mon Feb 20 13:44:43 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 20 Feb 2006 10:44:43 -0800
Subject: Unintended inheritance
Message-ID: <1140461082.972776.28090@g14g2000cwa.googlegroups.com>

The problem of unintended inheritance is typical for OO frameworks and
can be explained as follows. Given a class Foo implemented by Alice and
a derived class Bar of Foo implemented by Bob. Bar implements a method
f. In a later version of Foo Alice also implements a method f. The f of
Bar overrides the f of Foo unintentionally. If an instance bar of Bar
will be created and some method g of Foo calls f it is the wrong f,
namely the one of bar will be called.

To prevent unintended inheritance C# introduced a relatively complex
contract semantics using three modifiers virtual, override and new. Is
this issue serious for Python programmers, in particular for those
working in larger projects ( Twisted, Zope ... ) or is it not? If not,
why not?

Kay



From fakeaddress at nowhere.org  Tue Feb  7 16:17:24 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Tue, 07 Feb 2006 21:17:24 GMT
Subject: Question about idioms for clearing a list
In-Reply-To: <mailman.1537.1139297533.27775.python-list@python.org>
References: <mailman.1294.1138727665.27775.python-list@python.org>	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>	<mailman.1489.1139232969.27775.python-list@python.org><pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au>	<ds83kd$98m$1@sea.gmane.org><mailman.1510.1139250471.27775.python-list@python.org>	<43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
Message-ID: <E78Gf.22893$Jd.14515@newssvr25.news.prodigy.net>

Fredrik Lundh wrote:
> Steven D'Aprano wrote:
[...]
>>del L[:] works, but unless you are Dutch, it fails the
>>obviousness test.
> 
> 
> unless you read some documentation, that is.  del on sequences
> and mappings is a pretty fundamental part of Python.  so are slicings.

So is consistency; it ain't Perl, thank Guido.

Python now has, what, three built-in mutable collections types:
lists, dictionaries, and sets. Dicts and sets both have a clear()
method and lists do not. That's a wart, minor but easily fixed.


-- 
--Bryan


From lycka at carmen.se  Mon Feb 13 14:25:44 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Mon, 13 Feb 2006 20:25:44 +0100
Subject: installing python on a server?
In-Reply-To: <1139706294.331711.109520@f14g2000cwb.googlegroups.com>
References: <PB6Hf.1596$No6.37972@news.tufts.edu>
	<hntpu1pmctfaa61ns32k539nisvvljd96n@4ax.com>
	<DV6Hf.1597$No6.37987@news.tufts.edu>
	<1139610715.439681.185510@g44g2000cwa.googlegroups.com>
	<dvCdnRdmMdre43DeRVn-gw@rcn.net>
	<21bsu1dpb4nabbq04fdpubkidj23dh379j@4ax.com>
	<RuWdnViaD4SI3HPeRVn-tw@rcn.net>
	<mbssu1h9atu6i8h2o311932nbksbkmeluh@4ax.com>
	<1139706294.331711.109520@f14g2000cwb.googlegroups.com>
Message-ID: <dsqmfo$oh2$1@wake.carmen.se>

stewart.midwinter at gmail.com wrote:
> I'm wondering whether you couldnn't use MovPy for this purpose - a
> situation where you don't have root access. 

Huh? I thought the point with MovPy was *not* to install it!

A normal Python installation can certainly be performed in
the users home directory.

*If* John can log into the machine (ssh/telnet) and use
a C compiler (typical on a Linux box) he can build it from
source.

There are other problems though. Is he allowed to use
cgi-scripts or have his own processes running?

But in the end it's all simple.

John: Make sure to buy from an ISP that supports Python.
There are plenty of ISPs, so this can hardly be a major
obstacle.

See http://wiki.python.org/moin/PythonHosting for options.

The difficult thing is to decide how to build the web
page, considering all the web tool kits available...


I disagree on using Zope. It's probably not the easiest
to get an ISP to run, and the learning curve would not
be worth it for the intended purpose as I understood it.
Besides, Zope is currently in the transition from the
old version 2 to the much changed version 3, and one of
the big advantages of Zope, the big bunch of 3rd party
packages that you can simply plug in, it entirely a
Zope 2 phenomena. They don't exist for Zope 3 yet, so
you have to go for something old that will be deprecated
soon, or with the new and spiffy but ... empty.

For John, it seems Karrigell, http://karrigell.sourceforge.net/
could be a good fit.


From roy at panix.com  Fri Feb  3 09:00:29 2006
From: roy at panix.com (Roy Smith)
Date: Fri, 03 Feb 2006 09:00:29 -0500
Subject: Best way to determine if a certain PID is still running
References: <mailman.1377.1138957128.27775.python-list@python.org>
Message-ID: <roy-D36F67.09002903022006@reader2.panix.com>

David Hirschfield <davidh at ilm.com> wrote:

> I'm launching a process via an os.spawnvp(os.P_NOWAIT,...) call.
> So now I have the pid of the process, and I want a way to see if that 
> process is complete.
> 
> I don't want to block on os.waitpid(), I just want a quick way to see if 
> the process I started is finished.

On Unix, you can do kill (pid, 0), and if you get back ESRCH, you know the 
pid doesn't exist.  It is the classic way to ask if a process is running on 
Unix.  But, there's several problems with that, the biggest one being that 
those semantics don't seem to be exposed by phthon's os.kill() method.

> So, should I run a monitor thread which just calls os.waitpid() and when 
> the thread indicates via an event that the process completed, I'm golden?

That's what I would do.


From onurb at xiludom.gro  Wed Feb 15 06:47:14 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Wed, 15 Feb 2006 12:47:14 +0100
Subject: Pythonic gui format?
In-Reply-To: <1140003644.055366.316620@g47g2000cwa.googlegroups.com>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<43f11990$0$667$626a54ce@news.free.fr>
	<1139923105.939191.200660@z14g2000cwz.googlegroups.com>
	<1140003644.055366.316620@g47g2000cwa.googlegroups.com>
Message-ID: <43f314df$0$32162$626a54ce@news.free.fr>

Fuzzyman wrote:
(snip)

> You say you don't want an 'extra layer' between your GUI  and Python -
> but your approach of using XML has the same drawback. Storing your 'GUI
> configuration' in a text based format is a nice idea, but you will need
> *something* to do the translation.

Well, if the conf is valid Python, you've already get most of the
'something to do the translation' for free !-)


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From grisha at apache.org  Mon Feb 13 10:51:32 2006
From: grisha at apache.org (Gregory (Grisha) Trubetskoy)
Date: Mon, 13 Feb 2006 10:51:32 -0500
Subject: ANNOUNCE: Mod_python 3.2.7
Message-ID: <20060213104603.V24288@grisha.dyndns.org>


The Apache Software Foundation and The Apache HTTP Server Project are
pleased to announce the 3.2.7 release of mod_python. Mod_python 3.2.7
is considered a stable release, suitable for production use.

Mod_python is an Apache HTTP Server module that embeds the Python
language interpreter within the server. With mod_python you can write
web-based applications in Python that will run many times faster than
traditional CGI and will have access to advanced features such as
ability to maintain objects between requests, access to httpd
internals, content filters and connection handlers.

The 3.2.7 release has many new features, feature enhancements, fixed
bugs and other improvements over the previous version. See Appendix A
of mod_python documentation for more details.

Mod_python 3.2.7 is released under Apache License version 2.0.

Mod_python 3.2.7 is available for download from:

http://httpd.apache.org/modules/python-download.cgi

More information about mod_python is available at:

http://httpd.apache.org/modules/

Many thanks to Jim Gallacher, Graham Dumpleton, Nicolas Lehuen and
everyone else who contributed to and helped test this release, without
your help it would not be possible!

Regards,

Grisha Trubetskoy


From sundarashiv at gmail.com  Wed Feb 15 15:02:32 2006
From: sundarashiv at gmail.com (sundarashiv at gmail.com)
Date: 15 Feb 2006 12:02:32 -0800
Subject: Linux application in python
Message-ID: <1140032096.691138.286750@z14g2000cwz.googlegroups.com>

Hi all ,

I have a linux application that needs to run on a python interpreter
.So what is the best way to have the same functionalities provided by
"C" to be implemented in python .

WORST IDEA : Recode the entire application in Python . ..looking for
ideas better than mine 


Shiv Shankar



From rtilley at vt.edu  Mon Feb 27 10:55:28 2006
From: rtilley at vt.edu (rtilley)
Date: Mon, 27 Feb 2006 10:55:28 -0500
Subject: spaces at ends of filenames or directory names on Win32
In-Reply-To: <1140897423.932377.304640@i39g2000cwa.googlegroups.com>
References: <dtkuav$keb$1@solaris.cc.vt.edu>
	<1140897423.932377.304640@i39g2000cwa.googlegroups.com>
Message-ID: <440320F0.5060703@vt.edu>

drobinow at gmail.com wrote:
>  Please post your Python code.  I don't see the problem you're
> describing.

OK, here's a copy. This works on Mac/Unix/Linux yet has no effect on 
Windows:

-----------------------------------------------------------------
import os
import os.path

for root, dirs, files in os.walk(os.getcwd()):
     for d in dirs:
         new_d = d.strip()

## Uncomment the next 4 lines just to print dirs with end spaces.
##        if new_d != d:
##            print d
##        else:
##            print "No end spaces."

## Uncomment the next 7 lines to try a rename of dirs with end spaces.
##        if new_d != d:
##            try:
##                new_path = os.path.join(root, new_d)
##                old_path = os.path.join(root, d)
##                os.renames(old_path, new_path)
##            except Exception, e:
##                print e
------------------------------------------------------------------


From steve at REMOVEMEcyber.com.au  Sun Feb 12 20:04:52 2006
From: steve at REMOVEMEcyber.com.au (Steven D'Aprano)
Date: Mon, 13 Feb 2006 12:04:52 +1100
Subject: Downloading Large Files -- Feedback?
References: <1139773494.245577.102870@g47g2000cwa.googlegroups.com>
	<7x3bioxrnj.fsf@ruckus.brouhaha.com>
	<1139780009.673785.51270@g14g2000cwa.googlegroups.com>
Message-ID: <43EFDB34.80103@REMOVEMEcyber.com.au>

mwt wrote:

> Pardon my ignorance here, but could you give me an example of what
> would constitute file that is unreasonably or dangerously large? I'm
> running python on a ubuntu box with about a gig of ram.

1GB of RAM plus (say) 2GB of virtual memory = 3GB in total.

Your OS and other running processes might be using 
(say) 1GB. So 2GB might be the absolute limit.

Of course your mileage will vary, and in practice your 
machine will probably start slowing down long before 
that limit.


> Also, do you know of any online examples of the kind of robust,
> real-world code you're describing? 

It isn't written in C, but get your hands on wget. It 
is probably already on your Linux distro, but if not, 
check it out here:

http://www.gnu.org/software/wget/wget.html



-- 
Steven.



From robert.kern at gmail.com  Tue Feb 21 13:06:09 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 21 Feb 2006 12:06:09 -0600
Subject: Using CHACO and UNICODE
In-Reply-To: <1140541074.341977.266400@g14g2000cwa.googlegroups.com>
References: <1140541074.341977.266400@g14g2000cwa.googlegroups.com>
Message-ID: <dtfkqi$m4v$1@sea.gmane.org>

Mr BigSmoke wrote:
> I'm using chaco in an application that draw some grafs and plot. I
> really NEED to write unicode strings as a title (PlotTitle) and
> labels(PlotLabels) i my axis. The problem is that chat (and it's
> traits) only allow ascii strings... In the old version of chaco i
> created a new myPlotLabel class, derived from PlotLabel that alowed me
> to write unicode strings... but with the last version of Chaco i wasn't
> able to do that yet!! Someone can help me? Please, it's really
> important for me...

You're unlikely to find help here. This is the appropriate list:

  https://mail.enthought.com/mailman/listinfo/enthought-dev

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From nir at digitalpeers.com  Thu Feb  9 03:17:03 2006
From: nir at digitalpeers.com (Nir Aides)
Date: Thu, 09 Feb 2006 10:17:03 +0200
Subject: sys.path and unicode folder names
In-Reply-To: <43EA61B8.9040905@v.loewis.de>
References: <43e8c2ae$1@news.bezeqint.net>
	<43e8f3eb$0$7988$9b622d9e@news.freenet.de>
	<43e99e5e@news.bezeqint.net> <43EA3F20.2020402@v.loewis.de>
	<43ea541e@news.bezeqint.net> <43EA61B8.9040905@v.loewis.de>
Message-ID: <43eaf704@news.bezeqint.net>

If few people use file names not in their respective CP_ACP as you say, 
why did Microsoft bother to make Windows XP a unicode OS?
It does not make any sense.

The existence of such bugs is the source of the problem itself.

It is because of this situation that people in non-English speaking 
countries prefer to install English Windows XP. After all why should 
they get all messed up with incompatible software?

And from my experience a considerable percent of these 
stay-on-the-safe-side users have their CP_ACP pages setup incorrectly.

My software installs per-user Python modules in a sub-folder of the 
User's Application-Data folder. The software itself resides under 
Program-Files. The User's Application-Data folder will contain unicode 
characters if the User's account name contains unicode characters.

You can argue that the design is good or wrong or can be altered to work 
around the problem, but the fact remains:

Python is Broken.



Martin v. L?wis wrote:
> Nir Aides wrote:
>> Actually, I already managed to make a Patch for this problem.
>> I will post it soon on my website and in this group.
>>
>> But I find it strange that this problem even exists, and that I could
>> not find any workarounds on the Internet.
> 
> Very few people use file names not in their respective CP_ACP (why
> do you need such filenames?), and virtually nobody wants to put such
> a file name on Python's sys.path (why do you want to? - just rename
> the directory and be done).
> 
> Regards,
> Martin


From fredrik at pythonware.com  Thu Feb  2 06:06:56 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 2 Feb 2006 12:06:56 +0100
Subject: redirect and python
References: <1138865526.286565.282150@g14g2000cwa.googlegroups.com>
Message-ID: <drsp4g$mir$1@sea.gmane.org>

"questions?" wrote:

>I am calling system command in python by os.system()
>
> I do, os.system("wget http://blah blah blah")
>
> then I run the program by ./programname >redirected file
> The things put to screen doesn't redirect to the file I want.

the ">" operator redirects standard output only, but wget prints stuff to the
standard error channel.

> What's the trick in here?

the wget documentation explains how to redirect wget output.  if you don't
have the manual page, you can do

    wget --help

to get a list of options.  see the section "Logging and input files" for the options
you need.

</F> 





From erniedude at gmail.com  Fri Feb  3 16:08:23 2006
From: erniedude at gmail.com (Ernesto)
Date: 3 Feb 2006 13:08:23 -0800
Subject: Run Windows shortcut
Message-ID: <1139000903.156530.212100@g14g2000cwa.googlegroups.com>

Assuming the shortcut is in the current directory, how could I launch
the shortcut (without waiting for it to finish) ?



From mrstephengross at hotmail.com  Tue Feb 21 12:02:53 2006
From: mrstephengross at hotmail.com (mrstephengross)
Date: 21 Feb 2006 09:02:53 -0800
Subject: Is there a way to build python without 'posixmodule' ?
Message-ID: <1140539098.139121.148350@g44g2000cwa.googlegroups.com>

I'm working on building python 2.4.2 with the mingw compiler (on
cygwin). It runs into problems with Modules/posixmodule.c, because the
mingw compiler does *not* provide complex process management
functionality. I can exclude posixmodule.c from the python build
process, but gcc still fails when it tries to link together the python
executable:

(Error message follows)
=================================
gcc -mno-cygwin  -Wl,--out-implib=libpython2.4.dll.a -o python.exe \
                Modules/python.o \
                libpython2.4.a    -lm
libpython2.4.a(pystate.o)(.text+0x1e0): In function
`PyThreadState_New':
C:/cygwin/home/Administrator/sgross/sage/installer/python/i386-mingw-gcc/Python-2.4.2/Python/pystate.c:191:
undefined reference to `_PyGILState_NoteThreadState'
===================================

It would seem that the python executable is looking for the process
management functionality that *would* have been supplied by
posixmodule.o.

Is there a way around this? Can I build the python executable without
building posixmodule.o?

Thanks,
--Steve (mrstephengross at hotmail.com)



From hancock at anansispaceworks.com  Sun Feb 19 13:18:56 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Sun, 19 Feb 2006 12:18:56 -0600
Subject: Python vs. Lisp -- please explain
In-Reply-To: <dt916e$5e0$1@sea.gmane.org>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<dt916e$5e0$1@sea.gmane.org>
Message-ID: <20060219121856.66ad4e2d@samwise.anansi>

On Sun, 19 Feb 2006 00:54:22 -0500
"Terry Reedy" <tjreedy at udel.edu> wrote:
> In order to be that fast, some of the dynamism of
> intepreted Lisp must be  given up.  In particular object
> code is not list data.  Python with  type-dynamism
> eliminated can also be translated to decent C/C++ and then
> compiled.  See PyRex and Weave.  There is also Psyco,
> which I believe  translates directly to machine code.

I thought it was just "Pyrex" as in "Still as clear as
glass, but can really take the heat.".  ;-)

Now it's a small snake / dog chimera.  Eeeww. You've ruined
it for me.

> > so I don't understand why Python can't also eventually
> > be as efficient? Is there some *specific* basic reason
> > it's tough?  Or is it that this type of problem in
> > general is tough, and Lisp has 40+ years vs Python's ~15
> > years?

Otherwise, I think this has been well-answered -- if you
give up the same features, you can get the same speed. But
who cares?

Those things only matter in a very limited domain, and real
programs can use Python for logic and Python extension
modules for things that truly need optimization. If you use
Pyrex, you can even still pretend you're programming in
Python when you write those extensions. I'm sure that's why
some 3D libraries have opted to write the fast code in Pyrex
instead of C (even though either is possible).

 -- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From luke.plant at gmail.com  Thu Feb 23 08:22:25 2006
From: luke.plant at gmail.com (Luke Plant)
Date: 23 Feb 2006 05:22:25 -0800
Subject: make a class instance from a string ?
References: <mailman.1955.1140018042.27775.python-announce-list@python.org>
	<mailman.2340.1140687820.27775.python-list@python.org>
Message-ID: <1140700945.689245.210160@z14g2000cwz.googlegroups.com>

Bo Yang wrote:

> I know in java , we can use
>
> class.ForName("classname")
>
>
> to get an instance of the class 'classname' from a
> string , in python , how do I do that ?

In Python, classes are first class objects, so normally you would pass
the class itself around, rather than use the names of classes.  Of
course that might not be practical or applicable in your situation.

Luke



From wkehowski at cox.net  Thu Feb  9 06:52:29 2006
From: wkehowski at cox.net (walter kehowski)
Date: 09 Feb 2006 04:52:29 -0700
Subject: importing maple into python
References: <dd8ee248015b4389803bf6ff954758f1@ghytred.com>
Message-ID: <b329e003819748bab0d5562fd17beffd@ghytred.com>

Hello,

Is there for a python program to call maple?

Walter Kehowski

--





From gene.tani at gmail.com  Thu Feb 16 08:27:01 2006
From: gene.tani at gmail.com (gene tani)
Date: 16 Feb 2006 05:27:01 -0800
Subject: web crawler in python or C?
In-Reply-To: <7xr7635z4d.fsf@ruckus.brouhaha.com>
References: <1140069412.051298.242150@g44g2000cwa.googlegroups.com>
	<7xy80b96h2.fsf@ruckus.brouhaha.com>
	<1140075962.037640.126340@g43g2000cwa.googlegroups.com>
	<7xr7635z4d.fsf@ruckus.brouhaha.com>
Message-ID: <1140096421.375568.288730@g44g2000cwa.googlegroups.com>


Paul Rubin wrote:
> "abhinav" <abhinavduggal at gmail.com> writes:

> > maintaining huge data structures.What should be the language so as
> > not to compromise that much on speed.What is the performance of
> > python based crawlers vs C based crawlers.Should I use both the
> > languages(partly C and python).How should i decide what part to be
> > implemented in C and what should be done in python?  Please guide
> > me.Thanks.
>
> I think if you don't know how to answer these questions for yourself,
> you're not ready to take on projects of that complexity.  My advice
> is start in Python since development will be much easier.  If and when
> you start hitting performance problems, you'll have to examine many
> combinations of tactics for dealing with them, and switching languages
> is just one such tactic.

There's another potential bottleneck, parsing HTML and extracting the
text you want, especially when you hit pages that don't meet HTML 4 or
XHTML spec.
http://sig.levillage.org/?p=599

Paul's advice is very sound, given what little info you've provided.

http://trific.ath.cx/resources/python/optimization/
(and look at psyco, pyrex, boost, Swig, Ctypes for bridging C and
python, you have a lot of options.  Also look at Harvestman, mechanize,
other existing libs.



From gaz082 at gmail.com  Tue Feb 21 14:58:17 2006
From: gaz082 at gmail.com (Gaz)
Date: 21 Feb 2006 11:58:17 -0800
Subject: No
In-Reply-To: <mailman.2253.1140545818.27775.python-list@python.org>
References: <1140534490.873612.64280@g47g2000cwa.googlegroups.com>
	<1140544942.394795.240520@g47g2000cwa.googlegroups.com>
	<mailman.2253.1140545818.27775.python-list@python.org>
Message-ID: <1140551897.304048.47440@f14g2000cwb.googlegroups.com>

Aye, but the file is in MY drive, not the server. Perhaps  thats the
issue? I bet it's so... how should i deal with it? Perhaps should be a
script that uploads the files to the server and then emails it... i
believed this was handled using the root in my PC, but now i see this
is not correct.

Now i need a script for uploading the files from MY pc and then use the
sendmail thingie. Any tips about that script?



From jzgoda at o2.usun.pl  Fri Feb 17 16:51:02 2006
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Fri, 17 Feb 2006 22:51:02 +0100
Subject: Add a month
In-Reply-To: <1140178539.803209.84960@g47g2000cwa.googlegroups.com>
References: <1140173540.686250.205760@g44g2000cwa.googlegroups.com>
	<mailman.2046.1140175284.27775.python-list@python.org>
	<1140178539.803209.84960@g47g2000cwa.googlegroups.com>
Message-ID: <dt5ggp$t3c$1@atlantis.news.tpi.pl>

Paul Boddie napisa?(a):

>>what do you expect d_new to be after the operation ?  if the answer
>>is date(2006,3,17), what's date(2006,1,31) plus one month?
> 
> February 31st, of course:
> 
> http://sql-info.de/mysql/gotchas.html#1_14

MS SQL Server documentation marks dateadd() result as non-deterministic
in Transact-SQL reference. Adding 1 month to jan 31st gives feb 28 or
29, depending on year. It's not that bad, providing you know this
behaviour. ;)

-- 
Jarek Zgoda
http://jpa.berlios.de/


From sybrenUSE at YOURthirdtower.com.imagination  Mon Feb 20 15:29:29 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Mon, 20 Feb 2006 21:29:29 +0100
Subject: Canvas clicking stuff
References: <1140466964.673708.207240@o13g2000cwo.googlegroups.com>
Message-ID: <slrndvk9l9.eee.sybrenUSE@schuimige.unrealtower.org>

Tuvas enlightened us with:
> I have a picture that is being displayed on a canvas interface, that
> I want to do the following. [...]

There are loads of GUI toolkits you could be using.

Please read "How To Ask Questions The Smart Way":
http://catb.org/~esr/faqs/smart-questions.html

It's a very good read for anyone, and especially for you.

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From vinjvinj at gmail.com  Fri Feb 17 14:13:52 2006
From: vinjvinj at gmail.com (vinjvinj)
Date: 17 Feb 2006 11:13:52 -0800
Subject: ANN: Release of NumPy 0.9.5
In-Reply-To: <mailman.2044.1140171572.27775.python-list@python.org>
References: <mailman.2028.1140135591.27775.python-list@python.org>
	<45ljqdF7706gU1@individual.net>
	<mailman.2044.1140171572.27775.python-list@python.org>
Message-ID: <1140203632.748504.138390@g47g2000cwa.googlegroups.com>

I use Numeric extensivly and have been thinking of migrating to Numpy.
I have a couple of questions:

1. Will the speed of creating new arrays, copying new arrays and
slicing new arrays be similar  to Numeric?
2. I have some pyrex code that uses Numeric header files. will they be
compatible with numpy?
3. I use they following tow functions from scipy.core: extract, insert.
Are there similar functions in Numpy?

Thanks,

VJ



From flashkNO at SPAMgmail.com  Wed Feb 15 22:26:08 2006
From: flashkNO at SPAMgmail.com (Farshid Lashkari)
Date: Wed, 15 Feb 2006 19:26:08 -0800
Subject: Is empty string cached?
In-Reply-To: <mailman.1981.1140057796.27775.python-list@python.org>
References: <cUMIf.11894$MJ.4803@fed1read07>
	<mailman.1981.1140057796.27775.python-list@python.org>
Message-ID: <tgSIf.12036$MJ.8017@fed1read07>

> It takes far too little evidence to induce belief:
> 
>  >>> a = "hello"
>  >>> b = "h"+"ello"
>  >>> a is b
> False
>  >>> c = "hello"
>  >>> b is a
> False
>  >>>

I don't understand the point of your last expression. Were you intending 
this instead:

 >>> c is a
True

However, the following commands add to my confusion:

 >> a = 'wtf?'
 >> b = 'wtf?'
 >> a is b
False

So how are string literals cached? Is there an explanation somewhere? Is 
it some freaky voodoo, and I should just assume that a string literal 
will always generate a new object?

Thanks,
Farshid


From steve at REMOVETHIScyber.com.au  Wed Feb  1 05:59:21 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Wed, 01 Feb 2006 21:59:21 +1100
Subject: Why checksum? [was Re: Fuzzy Lookups]
References: <1138635665.956131.130630@f14g2000cwb.googlegroups.com>
	<1138670927.377396.78090@g44g2000cwa.googlegroups.com>
	<mailman.1266.1138680617.27775.python-list@python.org>
	<1138721690.283464.71570@g14g2000cwa.googlegroups.com>
	<mailman.1289.1138722708.27775.python-list@python.org>
	<pan.2006.01.31.21.28.14.333129@REMOVETHIScyber.com.au>
	<7xy80wm61h.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2006.02.01.10.59.21.530026@REMOVETHIScyber.com.au>

On Tue, 31 Jan 2006 13:38:50 -0800, Paul Rubin wrote:

> Steven D'Aprano <steve at REMOVETHIScyber.com.au> writes:
>> This isn't a criticism, it is a genuine question. Why do people compare
>> local files with MD5 instead of doing a byte-to-byte compare? Is it purely
>> a caching thing (once you have the checksum, you don't need to read the
>> file again)? Are there any other reasons?
> 
> It's not just a matter of comparing two files.  The idea is you have
> 10,000 local files and you want to find which ones are duplicates
> (i.e. if files 637 and 2945 have the same contents, you want to
> discover that).  The obvious way is make a list of hashes, and sort
> the list.

Sure. But if you are just comparing two files, is there any reason to
bother with a checksum? (MD5 or other.)

I can't see any, but I thought maybe that's because I'm not thinking
outside the box.


-- 
Steven.



From aahz at pythoncraft.com  Mon Feb  6 20:47:15 2006
From: aahz at pythoncraft.com (Aahz)
Date: Mon, 6 Feb 2006 17:47:15 -0800
Subject: BayPIGgies: Feb 9, 7:30pm (Ironport)
Message-ID: <20060207014715.GA983@panix.com>

The next meeting of BayPIGgies will be Thurs, February 9 at 7:30pm at
Ironport.

This meeting features PyCon practice talks by Wes Chun, Jimmy Retzlaff,
and possibly others.


BayPIGgies meetings alternate between IronPort (San Bruno, California)
and Google (Mountain View, California).  For more information and
directions, see http://baypiggies.net/


Before the meeting, we sometimes meet at 6pm for dinner.  Discussion of
dinner plans is handled on the BayPIGgies mailing list.  

Advance notice:  The March meeting will probably be a PyCon wrap-up.
Please e-mail baypiggies at python.org if you want to suggest an agenda (or
volunteer to give a presentation).
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"19. A language that doesn't affect the way you think about programming,
is not worth knowing."  --Alan Perlis


From sean at buildingonline.com  Fri Feb  3 13:24:08 2006
From: sean at buildingonline.com (Sean Berry)
Date: Fri, 3 Feb 2006 10:24:08 -0800
Subject: MySQLdb question... using table name as arg
Message-ID: <%cNEf.19800$sA3.14913@fed1read02>

I have four tables that all have the same column names (50 in each.)

I have created an admin program to edit, delete and add records to the 
tables and would like to use the table name as a variable in each query so 
the code can be used for each of the 4 tables.  Usually I would do something 
like this by having 1 table with special column to categorize the records as 
I am doing with each table, but this specific application requires that I do 
it with 4 tables instead.

To ensure that string are quoted properly without any hassle I use the 
execute function like so assuming c is my cursor object...

c.execute("update tableName set col1 = %s, col2 = %s, col3 = %s, ...", 
(val1, val2, val3, ...))

But, not I want to do this with a variable tableName.  If I add it to the 
tuple of parameters in the second arg before val1 and replace tableName with 
%s, then the tableName will be quoted in the query, causing an error.

What is the best (easiest) way for me to accomplish this?  I know it may be 
a stupid question but I just can't figure it out.


Thanks for any help. 




From sybrenUSE at YOURthirdtower.com.imagination  Thu Feb 23 12:16:10 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Thu, 23 Feb 2006 18:16:10 +0100
Subject: need help regarding compilation
References: <1140714583.014871.194640@p10g2000cwp.googlegroups.com>
Message-ID: <slrndvrreq.baf.sybrenUSE@schuimige.unrealtower.org>

fidlee at gmail.com enlightened us with:
> i am new to learning jython...

And to python, obviously

> i just tried compiling a small piece of code that is given below:
>
> def fac(x)
>  if x<=1:return 1
>  return x*fac(x-1)

You need to write 'def fac(x):'.

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From steven.klass at gmail.com  Mon Feb 13 09:58:11 2006
From: steven.klass at gmail.com (rh0dium)
Date: 13 Feb 2006 06:58:11 -0800
Subject: Need a bit of help with a list..
In-Reply-To: <1hanjnx.1iqgh0l1akgwxzN%aleaxit@yahoo.com>
References: <1139784338.534772.311320@f14g2000cwb.googlegroups.com>
	<1hanjnx.1iqgh0l1akgwxzN%aleaxit@yahoo.com>
Message-ID: <1139842691.395527.249620@g14g2000cwa.googlegroups.com>


Alex Martelli wrote:

> From this constuct I assume self.sections is a dict, in which case there
> may be better way to loop over the values in the dict; but that's an
> aside and does not affect your stated problem.  Rather, said problem is
> already shown in the next couple lines:
>
> >                 if re.match(r"^.*\+$",line):
> >                     line = line[:-1]
>
> A simple assignment _to a bare name_ (here, 'line') only ever affects
> that NAME itself - nothing else, and in particular not the object to
> which the name used to be bound before you re-bound it, not other names
> (or locations within a container) bound to the same object, and so on.

That's what I was thinking it was doing and a simple proof showed me
this..

> To affect some item, say the i-th one, of self.sections[section], you
> will need to assign something to self.sections[section][i].  You may
> give another and nicer name to the whole objects self.sections[section],
> but you will still need to assign to whatevername[i] to rebind the i-th
> item -- assign to an indexing, not to a bare name.
>
> There's another problem later in this inner loop:
>
> >                     del self.sections[section][nidx+1]
>
> ...don't alter the container you're directly looping on, for example by
> deleting some of its items: that will alter the semantics of the loop in
> way you most definitely don't want. I don't think it's biting you here,
> but in most cases it will indeed bite, and painfully.

Thanks so much for pointing this out - it explains some behaviour I was
seeing!!

> I would suggest restructuring your whole first nested loop, correcting
> other strangeness (which is innocuous) as we go, such as the strange re
> and the separate and identical increments of nidx along an if and an
> else branch.  For example, trying to stay as close as feasible to your
> original code, we might have:
>
>         for lines in self.sections.itervalues():
>             nidx = 0
>             while nidx<len(lines):
>                 line = lines[nidx]
>                 if line.endswith('+'):
>                     lines[nidx] = line[:-1] + " " + lines[nidx+1]
>                     del lines[nidx+1]
>                 nidx += 1
>

Ah - A couple new methods - Thanks so much for your insightful comments
and concerns.  I will take it from here - much appreciated!!



From guyon.moree at gmail.com  Fri Feb  3 12:46:19 2006
From: guyon.moree at gmail.com (=?iso-8859-1?B?R3V5b24gTW9y6WU=?=)
Date: 3 Feb 2006 09:46:19 -0800
Subject: web.py + cheetah delivering incomplete pages
In-Reply-To: <1138977432.206287.16130@g47g2000cwa.googlegroups.com>
References: <1138977432.206287.16130@g47g2000cwa.googlegroups.com>
Message-ID: <1138988779.571240.209970@g43g2000cwa.googlegroups.com>

hi, i think you'd have better luck at
http://groups.google.com/group/webpy



From niemand.leermann at thomas-guettler.de  Mon Feb  6 10:38:01 2006
From: niemand.leermann at thomas-guettler.de (Thomas Guettler)
Date: Mon, 06 Feb 2006 16:38:01 +0100
Subject: Webmail with Python
References: <pan.2006.02.04.20.02.29.212441@thomas-guettler.de>
	<43E726B5.5020109@mxm.dk>
Message-ID: <pan.2006.02.06.15.38.01.245423@thomas-guettler.de>

Am Mon, 06 Feb 2006 11:36:37 +0100 schrieb Max M:

> Thomas Guettler wrote:
>> Hi,
>> 
>> Is there an application like Squirrelmail[1] written in python?
>> 
>> I want to access IMAP folder with a web-browser.
>> 
>> Google shows me some dead projects. Most webmail applications
>> seem to be written in PHP. Is there a useable webmailer written
>> in python?
> 
> 
> This also requires Plone, so it might be a bit heavyweight for your needs:
> 
> http://www.mxm.dk/products/public/mxmImapClient/

Yes, Zope or Plone are to heavyweight for this. I will use squirrelmail,
I think it stable. I hope that I don't need to touch the PHP code.

 Thomas

-- 
Thomas G?ttler, http://www.thomas-guettler.de/
E-Mail: guettli (*) thomas-guettler + de
Spam Catcher: niemand.leermann at thomas-guettler.de



From deets at nospam.web.de  Fri Feb 24 14:20:26 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 24 Feb 2006 20:20:26 +0100
Subject: PyQt - multiple window instances?
In-Reply-To: <1140808598.748272.240790@i39g2000cwa.googlegroups.com>
References: <1140808598.748272.240790@i39g2000cwa.googlegroups.com>
Message-ID: <4694jqFa1ahgU1@uni-berlin.de>

gregarican schrieb:
> I have an PyQt app were I need one of the windows to be able to be
> opened more than one at a time. When I try to open it I only get one
> instance at the same time. The main class is the QWidget() class with a
> QGridLayout() displaying the various window components.
> 
> Is there a certain flag I need to set or different constructor I need
> to use to allow the window to be opened more than one at a time?

No. Must be something you're doing - I guess it might be that you should keep a reference to the old windows, otherwise 
they might go away when garbage-collected.

Diez


From pablodt05 at gmail.com  Mon Feb 13 14:31:56 2006
From: pablodt05 at gmail.com (pdt)
Date: 13 Feb 2006 11:31:56 -0800
Subject: how to...python with winmodem...
In-Reply-To: <44uoq4F44bs2U1@uni-berlin.de>
References: <1139409425.103880.149330@g44g2000cwa.googlegroups.com>
	<44uoq4F44bs2U1@uni-berlin.de>
Message-ID: <1139859116.288551.82060@g14g2000cwa.googlegroups.com>


Thank U. 10,
i ve got an error message...."error number port" or similiar..(i dont
have it now)
its a PCI modem, using COM 4 on Windows 98.....what do you say? no se
c?mo ha
gracias de nuevo...Pablo.

Diez B. Roggisch ha escrito:

> pdt wrote:
>
> > Hello, i wanna know how to communicate my python program with  my
> > winmodem on PC...thanks!!!
> 
> Use pyserial.
> 
> Diez



From gerryrmail-goog at yahoo.com  Wed Feb 15 17:53:23 2006
From: gerryrmail-goog at yahoo.com (gr)
Date: 15 Feb 2006 14:53:23 -0800
Subject: Unable to get PIL to load jpeg images
References: <1139263113.552140.114100@o13g2000cwo.googlegroups.com>
	<1139315319.654694.285330@g43g2000cwa.googlegroups.com>
	<mailman.1545.1139316436.27775.python-list@python.org>
	<1139475569.693965.249700@o13g2000cwo.googlegroups.com>
	<1140042505.720124.165250@f14g2000cwb.googlegroups.com>
Message-ID: <1140044003.003098.260870@f14g2000cwb.googlegroups.com>

Found it...and will share.

You need to install the "X Software Developement" library (standard
only is enough) from you Fedora distro...not sure what will be required
on other Linux distro's.

Worked like a charm...thanks Peter.

gerry rodman
http://www.gerryrodman.com/



From jhefferon at smcvt.edu  Tue Feb  7 07:41:12 2006
From: jhefferon at smcvt.edu (Jim)
Date: 7 Feb 2006 04:41:12 -0800
Subject: Strange behavior with os call in cgi script
References: <1139171873.431432.195080@f14g2000cwb.googlegroups.com>
	<43e665f1$1@news.uni-ulm.de>
	<1139176638.972414.19590@g47g2000cwa.googlegroups.com>
	<tf0du1h7sn03joag0cpjkmtm6hgfg2ppnv@4ax.com>
	<mailman.1464.1139197674.27775.python-list@python.org>
	<kbceu1thb6r2trb5u78ml5m9omlbs15moe@4ax.com>
Message-ID: <1139316072.216261.261290@g44g2000cwa.googlegroups.com>

> But I do think that adding logging to a cgi script is a sensible thing to
> do for a beginner.
Let me second that.  I happen to write a lot of CGI, and ISTM that
while you can do it without logging, you are condemming yourself to a
lot of staring at the screen, head-scratching, and saying ``Now what
could *that* mean?''  That is, CGI programming without logging seems to
me to ba a lot like general programming in Perl.  :-}

Jim



From chris.monnet at gmail.com  Tue Feb 21 06:02:28 2006
From: chris.monnet at gmail.com (Chris)
Date: 21 Feb 2006 03:02:28 -0800
Subject: DCOracle2: OCI error
References: <1140512929.421047.182510@o13g2000cwo.googlegroups.com>
Message-ID: <1140517499.363129.218920@g44g2000cwa.googlegroups.com>

Update: Instead of disconnect / reconnect, I made it so that in case of
1084 errors I rollback and retry the same INSERT again.
It worked... It's not beautiful code but it's working.
So really I think something's fishy in dco2.c
If someone tell me what should be investigated I could look into the
issue.

Chris



From timr at probo.com  Sat Feb 25 03:01:21 2006
From: timr at probo.com (Tim Roberts)
Date: Sat, 25 Feb 2006 08:01:21 GMT
Subject: unicode question
References: <mailman.2420.1140838251.27775.python-list@python.org>
Message-ID: <cf3002hv4ri62t6kjbe32p3te4elk3ihtn@4ax.com>

Edward Loper <edloper at gradient.cis.upenn.edu> wrote:

>I would like to convert an 8-bit string (i.e., a str) into unicode,
>treating chars \x00-\x7f as ascii, and converting any chars \x80-xff
>into a backslashed escape sequences.  I.e., I want something like this:
>
> >>> decode_with_backslashreplace('abc \xff\xe8 def')
>u'abc \\xff\\xe8 def'
>
>The best I could come up with was:
>
>   def decode_with_backslashreplace(s):
>       "str -> unicode"
>       return (s.decode('latin1')
>                .encode('ascii', 'backslashreplace')
>                .decode('ascii'))
>
>Surely there's a better way than converting back and forth 3 times?

I didn't check whether this was faster, although I rather suspect it is
not:

  cvt = lambda x: ord(x)<0x80 and x or '\\x'+hex(ord(x))
  def decode_with_backslashreplace(s):
      return ''.join(map(cvt,s))
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From icoba at yahoo.com  Tue Feb  7 13:46:30 2006
From: icoba at yahoo.com (icoba)
Date: 7 Feb 2006 10:46:30 -0800
Subject: Encoding detection in the html parser from  libxml2
Message-ID: <1139337990.903988.130270@g44g2000cwa.googlegroups.com>

Hi,

I am parsing html documents using the html parser from libxml2, and if
the encoding is included in the document it works perfectly but if it
is not, I think it does not work well (probably because I am doing
something wrong).

As it is said in http://xmlsoft.org/encoding.html the parser should
detect the encoding. So I tested it putting an utf-8 word in a file and
it does not detect it (it generates a wrong string). Example:
reducci??n --> reducci???n.

 I just use the parser as a SAX parser because I do not need a tree, so
to parse the file I use the htmlParseChunk() function and I create the
context with htmlCreatePushParser().

Is it posible that the encoding detection does not work with
htmlParseChunk? If it is so, what method should I use?

Thanks, Cesar



From peter at engcorp.com  Sat Feb  4 18:51:45 2006
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 04 Feb 2006 18:51:45 -0500
Subject: Generators vs. Functions?
In-Reply-To: <43E50E73.40504@kzoo.edu>
References: <0001HW.C00ABC2B000323A6F0335550@news.individual.de>
	<43E50E73.40504@kzoo.edu>
Message-ID: <ds3em8$gd4$1@sea.gmane.org>

Joseph Garvin wrote:
> Wolfgang Keller wrote:
>>If this is actually also true in the general case, and not due to eventual 
>>non-representativeness of the test mentioned above, is it simply due to a 
>>less-than-optimum implementation of generators in the current Pyython 
>>interpreter and thus likely to change in the future or is this a matter of 
>>principle and will consequently remain like this forever?
> 
> I am not a CPython or PyPy hacker, but I would guess that it will always 
> be slower as a matter of principal. When resuming a generator you have 
> to resetup the state the function was in when it was last called, which 
> I think should always be more costly than calling the function with a 
> clean state.
> 
> Someone want to correct me?

Sure.  "You have to resetup the state of the function"... depending on 
what "resetup" means (not a usual English word, so we might all imagine 
different meanings for it), either the first or the second part of the 
last sentence is false.

More precisely, the state of the function is *saved* when a yield 
occurs, so you certainly don't *recreate* it from scratch, but merely 
restore the state, and this should definitely be faster than creating it 
from scratch in the first place.  I haven't looked at the source, but 
this wouldn't have to involve much beyond a little memory copying, or 
even a few pointer changes, whereas the original could involve a lot of 
work, depending on how many arguments were passed, how many locals 
exist, and so on.

-Peter



From keith.b.perry at gmail.com  Mon Feb 20 23:34:55 2006
From: keith.b.perry at gmail.com (kbperry)
Date: 20 Feb 2006 20:34:55 -0800
Subject: Zope 3?? How do you start it on Windows?
Message-ID: <1140496495.019513.161010@z14g2000cwz.googlegroups.com>

Call me crazy and stupid, but how do you start zope?  I downloaded the
thing, installed it, and then nothing.  I can find a stupid README.txt
that is useful.

Can someone help?....Please!

Thx.



From webraviteja at gmail.com  Sat Feb  4 09:12:01 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 4 Feb 2006 06:12:01 -0800
Subject: Graphical introspection utilities?
In-Reply-To: <1139062078.561466.162170@z14g2000cwz.googlegroups.com>
References: <9nCP$o$FciB@jens-theisen.de>
	<1139062078.561466.162170@z14g2000cwz.googlegroups.com>
Message-ID: <1139062321.683229.5830@g47g2000cwa.googlegroups.com>

Oops.
http://www.activestate.com/_images/screenshots/ss_Komodo_rails_large.gif
is the debugger screenshot for Ruby (Komodo supports more than one
language). Python's debugger in Komodo looks exactly the same.



From tjreedy at udel.edu  Tue Feb  7 17:42:47 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 7 Feb 2006 17:42:47 -0500
Subject: Hi reliability files, writing,reading and maintaining
References: <Y15Gf.280109$D47.254492@fe3.news.blueyonder.co.uk>
Message-ID: <dsb7p7$cah$1@sea.gmane.org>


"John Pote" <johnpote at blueyonder.co.uk> wrote in message 
news:Y15Gf.280109$D47.254492 at fe3.news.blueyonder.co.uk...
> I would wish to secure this data gathering against crashes of the OS,

I have read about people running *nix servers a year or more without 
stopping.

> hardware failures

To transparently write to duplicate disks, lookup RAID (but not level 0 
which I believe does no duplication).

>and power outages.

The UPSes (uninterruptable power supplies) sold in stores will run a 
computer about half an hour on the battery.  This is long enough to either 
gracefully shut down the computer or startup a generator.






From lycka at carmen.se  Wed Feb 22 11:18:56 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 22 Feb 2006 17:18:56 +0100
Subject: getting the line just before or after a pattern searched
In-Reply-To: <1140146668.313276.91380@g43g2000cwa.googlegroups.com>
References: <1140146668.313276.91380@g43g2000cwa.googlegroups.com>
Message-ID: <dti2th$2pc$1@wake.carmen.se>

s99999999s2003 at yahoo.com wrote:
> hi
> 
> i have a file something like this
> 
> abcdefgh
> ijklmnopq
> 12345678
> rstuvwxyz
> .....
> .....
> .....
> 12345678
> .....
> 
> whenever i search the file and reach 12345678, how do i get the line
> just above and below ( or more than 1 line above/below) the pattern
> 12345678 and save to variables? thanks

For gigantic files (i.e. can't put all in RAM at once)
just make sure you always remember the previously read line.
Something like this:

old = None
f = open('mybigfile.txt')
for line in f:
     if line == '12345678\n':
         print old,
         print line,
         print f.next(),
     old=line


From ajsiegel at optonline.com  Tue Feb  7 07:21:23 2006
From: ajsiegel at optonline.com (Arthur)
Date: Tue, 07 Feb 2006 07:21:23 -0500
Subject: Detecting line endings
In-Reply-To: <SY%Ff.2208$D32.1862@fe12.lga>
References: <1139236514.022464.319970@g14g2000cwa.googlegroups.com>
	<1hacujo.1p81efw1ej38ioN%aleaxit@yahoo.com>
	<SY%Ff.2208$D32.1862@fe12.lga>
Message-ID: <5h0Gf.2209$D32.632@fe12.lga>

Arthur wrote:
> Alex Martelli wrote:
> 
> I just got flummoxed by this issue, working with a (pre-alpha) package 
> by very experienced Python programmers who sent file.readline to 
> tokenizer.py without universal newline support.  Went on a long (and 
> educational) journey trying to figure out why my file was not being 
> processed as expected.

For example, the widely used MoinMoin source code colorizer sends files 
to tokenizer without universal newline support:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52298

Is my premise that tokenizer needs universal newline support to be 
reliable correct?

What else could put it out of sync with the complier?

Art


From johnjsal at NOSPAMgmail.com  Sat Feb 11 14:53:38 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Sat, 11 Feb 2006 14:53:38 -0500
Subject: installing python on a server?
In-Reply-To: <21bsu1dpb4nabbq04fdpubkidj23dh379j@4ax.com>
References: <PB6Hf.1596$No6.37972@news.tufts.edu>
	<hntpu1pmctfaa61ns32k539nisvvljd96n@4ax.com>
	<DV6Hf.1597$No6.37987@news.tufts.edu>
	<1139610715.439681.185510@g44g2000cwa.googlegroups.com>
	<dvCdnRdmMdre43DeRVn-gw@rcn.net>
	<21bsu1dpb4nabbq04fdpubkidj23dh379j@4ax.com>
Message-ID: <RuWdnViaD4SI3HPeRVn-tw@rcn.net>

Dennis Lee Bieber wrote:
> On Sat, 11 Feb 2006 01:02:46 -0500, John Salerno
> <johnjsal at NOSPAMgmail.com> declaimed the following in comp.lang.python:
> 
>> Yikes, that's all the stuff I don't know. Maybe this is over my head 
>> right now.
> 
> 	Let's start with something simple then... Do you have admin (root)
> privileges on this server machine -- or is it a machine belonging to
> some ISP and you are hoping to add Python/CGI capability?

I guess it might be the latter. What I want is to add Python capability 
to the server where my website is running, so that I can write Python 
web apps and incorporate them into my HTML files.


From lycka at carmen.se  Fri Feb 17 08:06:11 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 17 Feb 2006 14:06:11 +0100
Subject: Is empty string cached?
In-Reply-To: <WCSIf.12038$MJ.252@fed1read07>
References: <cUMIf.11894$MJ.4803@fed1read07>	<mailman.1981.1140057796.27775.python-list@python.org>	<tgSIf.12036$MJ.8017@fed1read07>
	<mailman.1982.1140061103.27775.python-list@python.org>
	<WCSIf.12038$MJ.252@fed1read07>
Message-ID: <dt4ho4$76c$1@wake.carmen.se>

Farshid Lashkari wrote:
>> I really don't understand why it's so important: it's not a part of 
>> the language definition at all, and therefore whatever behavior you 
>> see is simply an artifact of the implementation you observe.
> 
> 
> I guess I should rephrase my question in the form of an example. Should 
> I assume that a new string object is created in each iteration of the 
> following loop?
> 
> for x in xrange(1000000):
>     func(x,'some string')
> 
> Or would it be better to do the following?
> 
> stringVal = 'some string'
> for x in xrange(1000000):
>     func(x,stringVal)
> 
> Or, like you stated, is it not important at all?

In this particular case, it's no big deal, since you use
a literal, which is something Python knows won't change.

In general, it's semantically very different to create an
object at one point and then use a reference to that over
and over in a loop, or to create a new object over and
over again in a loop. E.g.

for x in xrange(1000000):
     func(x, str(5))

v.s.

stringVal = str(5)
for x in xrange(1000000):
     func(x,stringVal)

This isn't just a matter of extra function call overhead. In
the latter case, you are telling Python that all calls to
"func(x,stringVal)" use the same objects as arguments (assuming
that there aren't any assignments to x and stringVal somewhere
else in the loop). In the former case, no such guarantee can
be made from studying the loop.

As for interning strings, it's my understanding that current
CPython interns strings that look like identifiers, i.e.
starts with an ASCII letter or an underscore and is followed
by zero or more ASCII letter, underscore or digit. On the other
hand, it seems id(str(5)) is persistent as well, so the current
implementation seems slightly simplified compared to the
perceived need. Anyway, this is just an implementation choice
made to improve performance, nothing to rely on.



From felipe.lessa at gmail.com  Sat Feb 11 17:21:42 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sat, 11 Feb 2006 20:21:42 -0200
Subject: itertools examples
Message-ID: <1139696502.9328.31.camel@kenshin>

Hi,

IMHO, on http://www.python.org/doc/current/lib/itertools-example.html ,
shouldn't the part

>>> for k, g in groupby(enumerate(data), lambda (i,x):i-x):
...     print map(operator.itemgetter(1), g)

be

>>> for k, g in groupby(enumerate(data), lambda (i, x): i-x):
...     print [i[1] for i in g]

?

AFAIK, list comprehensions are more preferable than map's as they're clearer. Or am I wrong?

Cya,
Felipe.

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From swrittenb at gmail.com  Wed Feb  8 15:50:19 2006
From: swrittenb at gmail.com (Swroteb)
Date: 8 Feb 2006 12:50:19 -0800
Subject: Pulling all n-sized combinations from a list
Message-ID: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>

Hi there,

I've got a reasonably sized list of objects that I'd like to pull out
all combinations of five elements from.  Right now I have a way to do
this that's quite slow, but manageable.  I know there must be a better
way to do this, but I'm not sure what it is.  Here's what I've got so
far:

        for a in myList:
            for b in myList:
                if a == b:
                    break
                for c in myList:
                    if b == c:
                        break
                    for d in myList:
                        if c == d:
                            break
                        for e in myList:
                            if d == e:
                                break
                            # my code here.

Atrocious and slow, I'm sure, but is there a better way?  I can't
simply create a list with the combinations I want, since it won't fit
into memory.  And I'm sure I can do it using a standard paradigm using
five indexed for loops (ie, for i = 1, for j = i+1, for k = j+1, etc.).
 But is there a really nice way to handle this in Python?

Thanks for your time!
Scott



From awaretek at gmail.com  Sat Feb 25 09:35:47 2006
From: awaretek at gmail.com (Ron Stephens)
Date: 25 Feb 2006 06:35:47 -0800
Subject: Is Python a Zen language?
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
Message-ID: <1140878147.541074.233540@i40g2000cwc.googlegroups.com>

Actually, Python has the distinction of being both a great tool
language *and* a great Zen language. That's what makes Python so cool
;-)))

Ron Stephens
Python411
www.awaretek.com/python/index.html



From robin at reportlab.com  Thu Feb 23 14:02:40 2006
From: robin at reportlab.com (Robin Becker)
Date: Thu, 23 Feb 2006 19:02:40 +0000
Subject: frozen codecs
Message-ID: <43FE06D0.30207@chamonix.reportlab.co.uk>

I'm having a problem with freeze vs Python-2.4. I need to get various codecs 
into the freeze, but suspect I need to explicitly import them. Must I just 
import codecs or all the ones I'm likely to use?
-- 
Robin Becker



From larry.bates at websafe.com  Wed Feb 22 18:12:20 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Wed, 22 Feb 2006 17:12:20 -0600
Subject: listdir() - any way to limit # of file entries?
In-Reply-To: <bunpv1pafuserji1bjft3146c7833h1pu9@4ax.com>
References: <bunpv1pafuserji1bjft3146c7833h1pu9@4ax.com>
Message-ID: <43FCEFD4.5080505@websafe.com>

Peter A. Schott wrote:
> I want to build a program that does some archiving.  We have several programs
> that have been dumping files into a folder (one folder) for some time now.  I
> want to limit the number of files returned by listdir to avoid trying to build a
> list with tons of entries.  I then want to move those files into a zip archive
> for the appropriate day/month.
> 
> Is there any way to build a list of the first 1000 files or so in a folder?
> 
> Running Python 2.4.2 on Win32 with Win32 extensions.
> 
> Thanks.
> 
> -Pete Schott


Since I assume that all the files are mixed together, I would probably
do this as a 2 step process:

Step 1 - Use os.walk and iterate over all the files moving them (using
os.shutil) into subdirectories based on their day/month information
(not sure where this information comes from).

Step 2 - Use os.walk to iterate over each of these directories and add
all the files contained in each day/month subdirectory into a .zip archive.

-Larry Bates


From aahz at pythoncraft.com  Sat Feb 11 12:29:53 2006
From: aahz at pythoncraft.com (Aahz)
Date: 11 Feb 2006 09:29:53 -0800
Subject: any way to customize the is operator?
References: <1138342643.119111.281900@g14g2000cwa.googlegroups.com>
	<1138346774.949296.192520@g14g2000cwa.googlegroups.com>
	<pan.2006.01.27.11.01.46.829464@REMOVETHIScyber.com.au>
	<1139618017.571180.23790@g47g2000cwa.googlegroups.com>
Message-ID: <dsl6uh$evl$1@panix1.panix.com>

In article <1139618017.571180.23790 at g47g2000cwa.googlegroups.com>,
Lonnie Princehouse <finite.automaton at gmail.com> wrote:
>
>> Why did you want to customize "is"?
>
>Well, mostly out of principle ;-)
>
>But also because I'm wrapping a C library which passes around C structs
>which are wrapped in shim C++ classes for a Boost.Python layer.  Boost
>Python does a marvelous job of translating between Python and C++ data
>types; when a C structure is returned, it magically translates that
>structure into a Python wrapper.   The problem is that a _new_ Python
>wrapper is created every time a pointer is returned, even if a  wrapper
>already exists for that particular pointer.

Then you need to fix Boost.Python.  This cannot and will not get fixed at
the Python level -- how can Python possibly know that they are the same
objects?
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"19. A language that doesn't affect the way you think about programming,
is not worth knowing."  --Alan Perlis


From max at alcyone.com  Mon Feb 13 21:10:54 2006
From: max at alcyone.com (Erik Max Francis)
Date: Mon, 13 Feb 2006 18:10:54 -0800
Subject: how do you pronounce 'tuple'?
In-Reply-To: <11v18rggmsa317d@corp.supernews.com>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net> <eiUHf.7378$bd4.6826@edtnps84>
	<yd1If.1599$No6.38148@news.tufts.edu>
	<11v18rggmsa317d@corp.supernews.com>
Message-ID: <4tWdndr5-7ezoWzenZ2dnUVZ_t6dnZ2d@speakeasy.net>

Grant Edwards wrote:

> Of course! What did you expect from devotees of a language
> named after one of the greatest comedy shows in TV history?

Seriously?  Endless references to it until it gets painfully old :-(.

The Python language, at least, has seemed to have gotten past that point 
in its history when every post had to be accompanied by a Monty Python 
gag ...

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   Whatever it is you came to teach me / I am here to learn it
   -- India Arie


From gene.tani at gmail.com  Thu Feb 23 09:12:21 2006
From: gene.tani at gmail.com (gene tani)
Date: 23 Feb 2006 06:12:21 -0800
Subject: regular expresson for Unix and Dos Lineendings wanted
In-Reply-To: <jterv157550g4qd4rosc3a2o8l69gcau8v@4ax.com>
References: <jterv157550g4qd4rosc3a2o8l69gcau8v@4ax.com>
Message-ID: <1140703941.270934.63050@f14g2000cwb.googlegroups.com>


Franz Steinhaeusler wrote:
> Hello, I need a regularexpression, which trims trailing whitespaces.
>
> While with unix line endings, it works;
> but not with Window (Dos) CRLF's:
>
> >>> import re
> >>> retrailingwhitespace = re.compile('(?<=\S)[ \t]+$', re.MULTILINE)
>
> 1) Windows
> >>> r="erewr    \r\nafjdskl     "
> >>> newtext, n = retrailingwhitespace.subn('', r)
> >>> n
> 1
> >>> newtext
> 'erewr    \r\nafjdskl'
>
> 2) Unix
> >>> r="erewr    \nafjdskl     "
> >>> newtext, n = retrailingwhitespace.subn('', r)
> >>> n
> 2
> >>> newtext
> 'erewr\nafjdskl'
> >>>
>
> Who can help me (regular expression, which works for both cases).

universal newlines:
http://www.python.org/doc/2.3.3/whatsnew/node7.html
http://mail.python.org/pipermail/python-list/2006-February/324410.html



From arkanes at gmail.com  Sat Feb 11 13:20:48 2006
From: arkanes at gmail.com (Chris Mellon)
Date: Sat, 11 Feb 2006 12:20:48 -0600
Subject: Yet another GUI toolkit question...
In-Reply-To: <43EE1817.7050702@wordtech-software.com>
References: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
	<mailman.1743.1139664790.27775.python-list@python.org>
	<43EE1817.7050702@wordtech-software.com>
Message-ID: <4866bea60602111020n380176d8ld45635a290c6b4bf@mail.gmail.com>

On 2/11/06, Kevin Walzer <sw at wordtech-software.com> wrote:
> Chris Mellon wrote:
>
> >
> > If you're planning on selling an application, especially to OS X
> > users, then Tk is absolutely out of the question. It doesn't have even
> > the slightest resemblence to native behavior, and lacks the polish and
> > flash that occasionally lets a non-native app get away with it. Given
> > the limits you've stated, I believe your only options are wxPython and
> > writting 2 guis using PyWin/PyObjC. The second option requires
> > knowledge of the native tool sets for the respective platforms, so if
> > you don't have that I can only suggest wxPython. If you're used to Tk
> > you will face a learning curve, and you will need to look for or write
> > replacements for the custom widgets you've been using.
> >
>
> Do these screenshots look "non-native" to you?

Yes, actually.  But thats not the point, and a trivial dialog isn't
enough to really judge Tile anyway.

>
> http://www.wordtech-software.com/ireveal-mac.png
> http://www.wordtech-software.com/ireveal-windows.png
> http://www.wordtech-software.com/ireveal-linux.png
>
> This application was developed in Tcl/Tk.
>
> I think Tkinter is lagging behind Tk itself in terms of its advances
> with theming and native look and feel, especially on OS X and Win XP.
> Certainly a lot of Python developers don't seem well-informed about the
> work that has been done to bring Tk back into the modern age. The
> wrappers I mentioned above (some at a site that is offline but should be
> back online shortly, I'm told) are bleeding-edge in Tkinter terms but
> reflect work that started a couple of years ago in Tk. (The extension is
> called "Tile" and will be part of the Tk core when it's released at v. 8.5).
>
> That doesn't mean wxPython is out of the question. What I'm trying to
> figure out is whether I will be up and running faster with Tkinter +
> Tile (leaving me mainly to improve my proficiency with Python itself and
> translate Tk into a Python idiom) or whether I should learn wxPython,
> with its vastly different GUI paradigm, as well as Python.
>

That depends almost totally on you and your skills, doesn't it? I'm an
unabashed fan of wxPython, so naturally I lean that way, but I
wouldn't deny that is has a learning curve. It's famous "C++ like API"
has seen vast improvement in the last few releases, by the way, and is
much more pythonic than a lot of people seem to believe  - no more
from wxPython import *, for example. I certainly find it's API more
pythonic than Tkinters.

> If Tkinter + Tile + Bwidgets + Tablelist does the job, as I think it may
> (and as it does with regular Tcl/Tk), then I will probably stick with
> that. And perhaps I can then contribute some documentation somewhere on
> how to use the Tile widgets in a Tkinter application, complete with
> screen shots and working code for others to use. Such documentation is
> sorely lacking right now.
>
> The vast range of available GUI toolkits is one thing that partially
> offsets Python's many virtues as a programming language. I realize I was
> stepping into a fire swamp by even broaching the question. However, the
> application I'm envisioning (accessing web services from a desktop GUI)
> will benefit from the abundant Python libraries/wrappers that have
> already been written, which are mostly lacking (or which would require
> me to roll my own) in Tcl.
>

I can't possibly see how an available range of GUI toolkits is a
detriment to a *language*. I can see (but don't neccesarily agree)
that is detrimental to a desktop environment or whatever, but not a
language. By that standard C is the worst language to ever exist, C++
only marginally better, and stuff like Visual FoxPro the best of all.

>
>
> --
> Kevin Walzer
> iReveal: File Search Tool
> http://www.wordtech-software.com
>


From mailinglist4ken at gmail.com  Sat Feb 11 04:59:35 2006
From: mailinglist4ken at gmail.com (Kenneth Xie)
Date: Sat, 11 Feb 2006 17:59:35 +0800
Subject: Is there any books such as 'effective python' or else about the
	performance?
Message-ID: <43EDB587.7040405@gmail.com>

att, thx.


From fredrik at pythonware.com  Tue Feb 28 04:42:43 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 28 Feb 2006 10:42:43 +0100
Subject: Fetching the Return results of a spawned Thread
References: <44048B82.4020508@gmail.com>
Message-ID: <du15ul$r1t$1@sea.gmane.org>

Alvin A. Delagon wrote:

> Is there any way to fetch the Return results of spawned threads within
> the parent script? I would like to do that because I'm having problems
> with Threads that do queries to a database, I often encounter Threads
> failing due to MySQL connection failures. As much as possible I plan to
> make the threads return the query string and let the parent script do
> the actual query. Thanks in advance.

use a shared Queue object, let the worker threads write their result to this
queue, and let the parent thread poll the queue:

    http://docs.python.org/lib/module-Queue.html

</F>





From jmbc at nospam.fr  Mon Feb 20 05:19:43 2006
From: jmbc at nospam.fr (jean-michel bain-cornu)
Date: Mon, 20 Feb 2006 11:19:43 +0100
Subject: module time
In-Reply-To: <dtc3n1$e0j$1@news.rtcomm.ru>
References: <dtc3n1$e0j$1@news.rtcomm.ru>
Message-ID: <43f997bf$0$1145$7a628cd7@news.club-internet.fr>

Sergey wrote:
> There is function
> mktime() -- convert local time tuple to seconds since Epoch
> in module time.
> But how about to convert *GMT time tuple* to seconds since Epoch?
> 
> Is there such function?
> 
> 
Does mktime(gmtime()) suit your needs ?
Regs,
jm


From mbirukou at yahoo.com  Mon Feb 27 20:03:50 2006
From: mbirukou at yahoo.com (Mikalai)
Date: 27 Feb 2006 17:03:50 -0800
Subject: PEP 354: Enumerations in Python
In-Reply-To: <4402AB7F.7070804@REMOVEMEcyber.com.au>
References: <87accdplbj.fsf@rose.polar.local>
	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>
	<4402AB7F.7070804@REMOVEMEcyber.com.au>
Message-ID: <1141088630.924931.69220@i39g2000cwa.googlegroups.com>

Steven D'Aprano wrote:
> Paul Rubin wrote:
>
> What is an empty enum? How and when would you use it?
>
> The best I can come up with is that an empty enum would
> be the enumerated values you have when you don't
> actually have any enumerated values. This is not to be
> confused with an empty list: an empty list is a
> well-defined concept. It is just a list (a container)
> with nothing in it. A list of X is like a box
> containing X, and like boxes, an empty list (or set, or
> dict) is meaningful. An enum of X is just the Xs
> themselves. If there is no X, there is nothing there.

"Nothing" in python is None. If empty enum is None, then it is the same
as empty list in Lisp is nil, i.e. type-of(nil)=='list. Giving a type
to nothing, isn't really useful. Thus, empty enum is needed.

Programaticaly or, say, in implementation, enum is some structure that
holds some stuff. Just like tuples and lists are structures to hold
something. As a structure, it can be empty.



From alan.franzoni.xyz at gmail.com  Wed Feb 22 17:44:41 2006
From: alan.franzoni.xyz at gmail.com (Alan Franzoni)
Date: Wed, 22 Feb 2006 23:44:41 +0100
Subject: Psychic bug
References: <8qcpv1hrcepsukouv371seacoe40u0lr43@4ax.com>
Message-ID: <1u4evyony95tg$.18et8a8064pm2$.dlg@40tude.net>

Il Wed, 22 Feb 2006 19:04:48 +0000, Jennifer Hallinan ha scritto:

> Genome is a string of integers in the range 0- 3, hence the
> conversion.

Genome is a *class*, i suppose from this code, and Mutate is... an instance
method, I think. And self.genome is a string like composed of integers in
the 0-3 range.

I would advise you to use a list in first place, and define a method (maybe
__str__ or __repr__ ) in your class in order to output it as a string - I
think it may make your work easier.

Your code is a little unpythonic-inside. I think you're coding from a very
programmer-unfriendly language :-)

I don't understand your specific problem (it may be class-related but we
can't know if you don't post your full code) because the code looks fine to
me, e.g. it works as it should, with that line commented out.

For printing, try this:

print "pos:%s , old value: %s, new value: %s " % (
                                         letter, gen[letter], base)

in place of your two prints in the if block, it should help you.

-- 
Alan Franzoni <alan.franzoni.xyz at gmail.com>
-
Togli .xyz dalla mia email per contattarmi.
To contact me, remove .xyz from my email address.
-
GPG Key Fingerprint:
5C77 9DC3 BD5B 3A28 E7BC 921A 0255 42AA FE06 8F3E


From nnorwitz at gmail.com  Fri Feb  3 22:00:35 2006
From: nnorwitz at gmail.com (Neal Norwitz)
Date: Fri, 3 Feb 2006 19:00:35 -0800
Subject: [ANN] PyChecker 0.8.17 released
Message-ID: <ee2a432c0602031900j22ce3acw8c5d0f6628d4a189@mail.gmail.com>

A new version of PyChecker is available.
    There are two notable new features (command line options):
    --only and -#/--limit.  --only will only print warnings from files
specified
    on the command line.  --limit will limit the number of warnings printed.
    By default, only 10 warnings are printed unless you disable
    the limit check:  -# 0.

What is it?
        PyChecker is a tool for finding bugs in Python source code.
        It finds problems that are typically caught by a compiler for less
        dynamic languages, like C and C++.  It is similar to lint.

Comments, criticisms, new ideas, and other feedback is welcome.

Changes from 0.8.16 to 0.8.17:
  * Fix spurious warning for Statement with no effect using bit shifts
  * Add -#/--limit command line option to set the max # of warnings to show
  * Remove broken command line options:  -e/--errors, --complexity
  * Add -e/--level command line options which allows the error level
    to be specified:  error, security, warning, unused, deprecated, style.
    These names map to numbers: 90, 90, 70, 50, 40, 10 (error == security).
    Specifying a value means all levels equal to or greater than it.
  * Add --only option which displays warnings only for files specified
    on the command line
  * Add --evil option for users to prevent the interpreter from crashing
    due to broken C extensions
  * Fix wrong file name when warning about returning values from
    __init__ functions. (#1291116)
  * Fix a few more glitches with setup.py.
  * Suppress warning about integer division when the code is: int(x / y)
  * Add code to skip testing objects from extension modules that are
    known to crash the interpreter.  Currently, the list includes old
versions of
    matplotlib.axes.BinOpType and wx.TheClipboard.
  * Support ROT_THREE and ROT_FOUR opcodes

PyChecker is available on Source Forge:
    Web page:           http://pychecker.sourceforge.net/
    Project page:       http://sourceforge.net/projects/pychecker/
    Mailing List:       pychecker-list at lists.sourceforge.net

Enjoy and don't forget to provide feedback!

Neal
--
pychecker-list at lists.sourceforge.net


From jstroud at ucla.edu  Tue Feb 21 18:13:33 2006
From: jstroud at ucla.edu (James Stroud)
Date: Tue, 21 Feb 2006 15:13:33 -0800
Subject: Tkinter Event Binding Double-click
In-Reply-To: <1140554886.169328.265060@f14g2000cwb.googlegroups.com>
References: <1140554886.169328.265060@f14g2000cwb.googlegroups.com>
Message-ID: <dtg6qt$7m3$1@daisy.noc.ucla.edu>

Tuvas wrote:
> I am trying to execute a function with a tkinter event binding double
> click. With 2 mouse clicks done quickly, the function should happen,
> otherwise, it should not. However, I am noticing that the time that the
> event binding of a double-click is quite long, on the order of a second
> or so. I am double-clicking twice in a second, and the function is
> being executed 3 times, and not just 2. I want to know, is this
> controlled by the OS, or by Tkinter? And if by tkinter, is there a way
> to change it, and how so? Thanks!
> 

You might need to provide more info and some relevant code. I bind to 
double click all of the time and it works fine.

James


From kent at kentsjohnson.com  Thu Feb  2 13:20:26 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Thu, 02 Feb 2006 13:20:26 -0500
Subject: dynamic class instantiation
In-Reply-To: <drr0na$rp0$1@chessie.cirr.com>
References: <drlrtb$91v$1@chessie.cirr.com> <43de9abc$1_2@newspeer2.tds.net>
	<drnjid$flc$2@chessie.cirr.com>
	<slrndu0d72.ltb.volker_grabsch@modi.mathematik.hu-berlin.de>
	<drr0na$rp0$1@chessie.cirr.com>
Message-ID: <43e2494f$1_1@newspeer2.tds.net>

Ognen Duzlevski wrote:
> Volker Grabsch <volker_grabsch at v.notjusthosting.com> wrote:
>>I'm sure you could replace 2/3 of your code with something much simpler
>>(and shorter!) just by not inventing a new language and using the power
>>of Python instead.
> 
> 
> Hi Volker,
> 
> I appreciate your comments. Basically, the reason why this code generator
> exists is the fact that I do not want to hard-code the resulting xml in 
> any way. The users of the web/db framework of which this solution is part of
> might like the "web page" definition I offer them, but, some might want to extend it.
> While dom allows me to traverse an xml hierarchy - it does not allow me to
> give "meaning" to the tags. The only way to do that (for me) is to represent
> the tags as classes with containers containing other classes (tags) and so on. Since
> I do not know ahead of time what the tags will be - I need to generate the code
> to actually handle them.
> 
> Can you suggest a better approach or did you already do that and I just missed 
> it? :)

Instead of generating Python code and importing it, you could create the 
classes directly. You would still have your own language but no code 
generator.

For a very simple example, you could have a base class that initializes 
attributes from a class dictionary:
class DynamicInits(object):
   def __init__(self):
     self.__dict__.update(self.inits)

and a simple factory function that creates a subclass with an 
appropriate dict of initializers:
def classFactory(name, initializers):
   return type(name, (DynamicInits,), {'inits' : initializers})

In your original post you show this class:
class page(object):
	def __init__():
		self.name = None
		self.caption = None
		self.functions = []

With the above definitions, an equivalent class is created by calling
page = classFactory( 'page', { 'name' : None, 'caption': None, 
'functions' : []} )

Kent


From deets at nospam.web.de  Sun Feb  5 06:23:03 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 05 Feb 2006 12:23:03 +0100
Subject: jython newbee general question docu / os.fstat
In-Reply-To: <1139131769.522037.235180@z14g2000cwz.googlegroups.com>
References: <1139131769.522037.235180@z14g2000cwz.googlegroups.com>
Message-ID: <44m5goF2r8rkU1@uni-berlin.de>

Mark Fink schrieb:
> Hi there,
> 
> unfortunately I am new to Jython and my "Jython Essentials" book is
> still in the mail. I looked into the Jython API Doc but could not find
> the information.
> I am porting a Python library to Jython and some parts are missing. My
> question basically is where do I find information on what to use
> instead. E.g. I could not find information on the os module. I do not
> find the sys module docu either.
> The concrete problem is I have something like os.fstat(infile.fileno())
> which provokes:
> IOError: fileno() is not supported in jpython.
> If this question is already documented somewhere please point me to
> this direction. I was not able to find it.

The general problem lies within JAVA. Instead of python that tries to 
incorporate os-specific modules, it focuses of a common subset - 
excluding lots of functionality. fstat and lots of functions in os are 
not available - for example, you can't change the current working 
directory. fstat is  a posix-call, which is also not available.

The general rule of thumb is: whenever you encounter something missing, 
try to find a solution for java. That could e.g. be a JNI-interfaced 
special library to access the com-port or something else. If such a 
solution exists, use that (its easy enough from jython). If not - bad luck.

Diez


From elpX at adsihqX.com  Tue Feb 21 17:53:50 2006
From: elpX at adsihqX.com (Dr. Pastor)
Date: Tue, 21 Feb 2006 22:53:50 GMT
Subject: Video.
In-Reply-To: <slrndvn5tb.bv5.sybrenUSE@schuimige.unrealtower.org>
References: <bAMKf.4037$UN.840@newsread2.news.pas.earthlink.net>
	<slrndvn5tb.bv5.sybrenUSE@schuimige.unrealtower.org>
Message-ID: <2SMKf.4114$JR6.2895@newsread3.news.pas.earthlink.net>

Thank you Sybren.
Where is it?
Regards.


From duncan.booth at invalid.invalid  Sun Feb  5 05:05:22 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 5 Feb 2006 10:05:22 GMT
Subject: Generators vs. Functions?
References: <0001HW.C00ABC2B000323A6F0335550@news.individual.de>
	<43E50E73.40504@kzoo.edu>
	<mailman.1426.1139097119.27775.python-list@python.org>
	<gkeFf.434944$2k.218378@pd7tw1no>
	<pan.2006.02.05.08.14.28.103057@REMOVETHIScyber.com.au>
Message-ID: <Xns9761669F04C2Aduncanbooth@127.0.0.1>

Steven D'Aprano wrote:

>>>> t1.timeit()
> 0.63980388641357422
...
>>>> t2.timeit()
> 0.82081794738769531
> 
> So on the basis of my tests, there is a small, but significant speed
> advantage to _calling_ a function versus _resuming_ a generator.

I get the same, but the difference is much less on my system:

>>> min(t1.timeit() for i in range(3))
0.43929577641858941
>>> min(t2.timeit() for i in range(3))
0.46473169075954956

You missed though what is perhaps a more representative case. Generators 
have state, so for a fair comparison you need to restore some state. I 
think a fairer comparison is:

>>> t5 = timeit.Timer(stmt="func.next()", setup=
"""class K:
   pass

   def next(self):
      return 1

func = K()
""")
>>> 
>>> min(t5.timeit() for i in range(3))
0.58508302032805659


The method call is slower than the generator resumption and that is without 
even accessing any of the saved state. If you do access the saved state the 
generator runs at about the same speed as the original (local variable 
access is about as fast as accessing a constant), but the method slows down 
even more:

>>> t6 = timeit.Timer(stmt="gen.next()", setup=
"""def g(n):
  while 1: yield n
gen = g(42)
""")
>>> min(t6.timeit() for i in range(3))
0.46405506845144373
>>> t7 = timeit.Timer(stmt="func.next()", setup=
"""class K:
   def __init__(self, n):
       self.n = n

   def next(self):
      return self.n

func = K(42)
""")
>>> min(t7.timeit() for i in range(3))
0.67426781895460408




From martin at v.loewis.de  Wed Feb  8 14:06:26 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 08 Feb 2006 20:06:26 +0100
Subject: Problem with curses and UTF-8
In-Reply-To: <11ujl0hof3fql62@corp.supernews.com>
References: <mailman.1566.1139345769.27775.python-list@python.org>
	<43E9234B.6030108@v.loewis.de> <11ujl0hof3fql62@corp.supernews.com>
Message-ID: <43ea4132$0$6793$9b622d9e@news.freenet.de>

Thomas Dickey wrote:
> no need for debugging - it's a well-known problem.  UTF-8 uses more than
> one byte per cell, normal curses uses one byte per cell.  To handle UTF-8,
> you need ncursesw.

I tried that, but it didn't improve anything.

Regards,
Martin


From fuzzyman at gmail.com  Thu Feb  9 07:06:42 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 9 Feb 2006 04:06:42 -0800
Subject: line wrapping problem
In-Reply-To: <1139484488.037165.106170@g43g2000cwa.googlegroups.com>
References: <1139484488.037165.106170@g43g2000cwa.googlegroups.com>
Message-ID: <1139486802.651150.239420@g43g2000cwa.googlegroups.com>


S Borg wrote:
> Hello,
>
>  I am parsing text from one document to another. I have a scheme
> similar to:
>
>  for x in myfoobar:
>    print >> mytextfile, "%s    " % mydictionary[x],   #all on same line
>  print >> mytextfile, '\n'      #new line
>

You are using the print command to output the text to your file. This
will always put a '\n' at the end of lines (as well as your explicit)
one. The only time it doesn't do this is if the line ends with a
trailing comma, in which case it just adds a space.

The usual way is to write to yhour file object using :

mytextfile.write( mytextfile, "%s    " % mydictionary[x],)

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml

>
> I am getting line breaks before my explicit line break. Am I
> unwittingly copying '\n' characters from the original file?
> How should I fix this(What is the 'Pythonic' solution)?
> 
> thanks,
> -S



From python-url at phaseit.net  Mon Feb 20 18:08:24 2006
From: python-url at phaseit.net (Cameron Laird)
Date: Mon, 20 Feb 2006 23:08:24 GMT
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Feb 20)
Message-ID: <dtdf49$mje$1@lairds.us>

QOTW:  "On the other hand, lousy testing is practically worthless." - Steve
D'Aprano

"Komodo adds no goo to your code." - Trent Mick


    A nice if implicit comparison of stylish use of a regular
    expression vs. an equally stylish procedural approach:  which
    is easier for *you* to maintain?
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/104e2da852269d01/

    Sibylle Koczian, Fredrik Lundh, and others illustrate
    simple function nesting as an example of "free variables"
    or "enclosing scope locals":
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/3c682f2af5bc039b/

    Diez B. Roggisch comments on the portability and applicability
    of IronPython:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/2762f6dfc5f72651/

    To safen a Python sandbox is less quixotic than you might
    have heard:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/e6e428d39998bffc/

    lambda stays:
        http://mail.python.org/pipermail/python-dev/2006-February/060415.html
        

========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Steve Bethard, Tim Lesher, and Tony Meyer continue the marvelous
    tradition early borne by Andrew Kuchling, Michael Hudson and Brett
    Cannon of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and
sponsor the "Python-URL!" project.


From http  Mon Feb 20 19:37:00 2006
From: http (Paul Rubin)
Date: 20 Feb 2006 16:37:00 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
Message-ID: <7xoe114ker.fsf@ruckus.brouhaha.com>

63q2o4i02 at sneakemail.com writes:
> I'm wondering if someone can explain to me please what it is about
> Python that is so different from Lisp that it can't be compiled into
> something as fast as compiled Lisp?  From this above website and
> others, I've learned that compiled Lisp can be nearly as fast as C/C++,
> so I don't understand why Python can't also eventually be as efficient?
>  Is there some *specific* basic reason it's tough?

The issues of compiling Python and compiling Lisp are similar.  Lisp
implementers tend to care about performance more, so Lisp tends to be
compiled.  There's a Python compiler called Psyco which can be used
with CPython and which will be part of PyPy.  I'd expect its output
code to be comparable to compiled Lisp code.


From fredrik at pythonware.com  Sun Feb 12 16:03:25 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 12 Feb 2006 22:03:25 +0100
Subject: python and webcam
References: <1139773485.698970.195320@z14g2000cwz.googlegroups.com><slrnfa00000duv6pl.915o.pbouige@electre.pasteur.fr>
	<1139777880.787466.210640@f14g2000cwb.googlegroups.com>
Message-ID: <dso7qv$cfo$1@sea.gmane.org>

"dfaber" <deusfaber at gmail.com> wrote:

> It is a  Win32 Python Extension. I am looking for something that work
> on Linux.

here's one:

    http://antonym.org/libfg

(for more alternatives, google for "python webcam linux" or some
variation thereof)

</F>





From steve at REMOVETHIScyber.com.au  Fri Feb 10 19:19:03 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sat, 11 Feb 2006 11:19:03 +1100
Subject: arrays in python
References: <mailman.1727.1139613159.27775.python-list@python.org>
Message-ID: <pan.2006.02.11.00.19.02.766817@REMOVETHIScyber.com.au>

On Fri, 10 Feb 2006 17:50:21 -0500, Kermit Rose wrote:

> I want to write a program in python using integer arrays.
>  
> I wish to calculate formulas using 200 digit integers.

Must the integers have exactly 200 digits? If you multiply one of these
200-digit integers by ten, should it silently overflow, raise an
exception, or become a 201-digit integer?

[snip]

> The zeros function always gives me an error message.

Oh, don't tell me, I love playing guessing games!

Is it a SyntaxError?



-- 
Steven.



From fredrik at pythonware.com  Fri Feb 17 04:56:21 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Feb 2006 10:56:21 +0100
Subject: question about scope
References: <9J0Jf.1630$No6.38274@news.tufts.edu>
	<AV0Jf.1631$No6.38357@news.tufts.edu>
Message-ID: <dt46k8$63n$1@sea.gmane.org>

John Salerno wrote:

> > I understand what global and built-in are, and I thought I understood
> > the concept of local too, but when I got to this sentence (and the
> > previous sentence), I became confused about the first two scopes. What's
> > the difference between 'local' and 'enclosing functions'?
>
> I guess maybe I jumped the gun. Here's some stuff later in the chapter
> that I think explains it for me:
>
> ----------
> Note that the second 'E' scope lookup layer -- enclosing defs or lambdas
> -- technically can correspond to more than one lookup layer. It only
> comes into play when you nest functions within functions.*
>
> * The scope lookup rule was known as the "LGB" rule in the first edition
> of this book. The enclosing def layer was added later in Python, to
> obviate the task of passing in enclosing scope names explicitly -- 
> something usually of marginal interest to Python beginners.
> ----------

that footnote is slightly misleading, though -- there's no way to pass
in enclosing scope names in Python.  what you can do is to pass in
*objects* into an inner scope, using the default argument syntax.  an
example:

    var = "global"

    def func1(arg):
        print var

    def func2(arg, var=var):
        print var

here, func1's "var" is bound to the *name* of the outer variable, so if
the variable is changed, it will print the new value.

in contrast, func2's "var" is bound to the *value* that the outer variable
had when the def statement was executed, so it will print the same thing
every time you call it, even if the outer variable is changed.

what the note refers to in modern python, the name binding (in func1)
also works as expected if you nest scope:

    var = 0 # global

    def outer():

        var = 1 # local to outer, enclosing in func1

        def func1(arg):
            print var #enclosing in today's python, global in old pythons

        def func2(arg, var=var):
            print var

        func1() # prints 1 in today's python, 0 in old pythons
        func2() # prints 1 in all versions

        var = 2

        func1() # prints 2 in today's python, 0 in old pythons
        func2() # prints 1

(I hope this didn't confuse things even more.)

</F>





From fuzzyman at gmail.com  Tue Feb 21 05:58:00 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 21 Feb 2006 02:58:00 -0800
Subject: changing value of 'self' when subclassing int
In-Reply-To: <mailman.2170.1140453870.27775.python-list@python.org>
References: <mailman.2170.1140453870.27775.python-list@python.org>
Message-ID: <1140519480.240954.79270@z14g2000cwz.googlegroups.com>


David Coffin wrote:
> I'd like to subclass int to support list access, treating the integer
> as if it were a list of bits.
> Assigning bits to particular indices involves changing the value of
> the integer itself, but changing 'self' obviously just alters the
> value of that local variable.
> Is there some way for me to change the value of the BitSequence
> object itself? I've also tried wrapping and delegating using
> __getattr__, but I couldn't figure out how to handle in-place methods.
>

Probably your best bet is to have the assignment done as a method call
which returns the new value.

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml

> Thanks for your help,
> David Coffin
> 
>



From __peter__ at web.de  Mon Feb 20 03:07:32 2006
From: __peter__ at web.de (Peter Otten)
Date: Mon, 20 Feb 2006 09:07:32 +0100
Subject: Multiplication optimization
References: <1140310118.365847.111120@g14g2000cwa.googlegroups.com>
	<1140337770.128317.82980@g14g2000cwa.googlegroups.com>
Message-ID: <dtbt8m$6dm$01$1@news.t-online.com>

Atanas Banov wrote:

> Paul McGuire wrote:
>> Does Python's run-time do any optimization of multiplication
>> operations, like it does for boolean short-cutting?  That is, for a
>> product a*b, is there any shortcutting of (potentially expensive)
>> multiplication operations
> 
> no. and the reason is very simple: to the extent such optimization
> makes sense, it has been done on assembler/CPU level already. i.e. when
> the multiplication is mapped to the machine code
>    IMUL  <op>
> the Pentium processor would be smart enough not to do the work if AX or
> the op are 0 or 1.
> 
> Python has no job trying to outsmart Intel (and the other chipmakers).
> Boolean shortcuts are useful for entirely different reason, not speed.
> e.g.
>         if lastDigit == 0 or i % lastDigit != 0:
>             break
> 
> if both operands of OR were to be evaluated, that would end up with
> division-by-zero exception for lastDigit=0.

The point is not to avoid the multiplication on the CPU level but the object
creation overhead:

>>> a = 1234
>>> 1 * a is a
False # could be True


$ python -m timeit -s'a=1;b=1234567' 'if a is 1: x = b' 'else: x = a * b'
10000000 loops, best of 3: 0.171 usec per loop
$ python -m timeit -s'a=1;b=1234567' 'x = a * b'
1000000 loops, best of 3: 0.211 usec per loop
$ python -m timeit -s'a=2;b=1234567' 'if a is 1: x = b' 'else: x = a * b'
1000000 loops, best of 3: 0.329 usec per loop

If 'a is 1' is sufficiently likely, that test speeds up the code even in
pure Python. Of course a generalized implementation would also have to
check b's type:

$ python -m timeit -s'a=1;b=1234567' 'if a is 1 and b.__class__ is int: x =
b' 'else: x = a * b'
1000000 loops, best of 3: 0.484 usec per loop

So that is not a good idea, at least in pure Python.

Peter



From KennethGorelick at gmail.com  Sun Feb 19 14:56:08 2006
From: KennethGorelick at gmail.com (KennethGorelick)
Date: 19 Feb 2006 11:56:08 -0800
Subject: Countdown Timer
Message-ID: <1140378968.362832.250720@g47g2000cwa.googlegroups.com>

Could someone tell me what modules I should look at in the Python
Manual to create a countdown timer that counts the years, days, hours,
minutes, and seconds to a given day?  Thanks in advance!  I'm fairly
new to the language, so please put it in newbie terms.  I only know the
basics.



From cfbolz at gmx.de  Wed Feb 22 09:17:07 2006
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Wed, 22 Feb 2006 15:17:07 +0100
Subject: Python vs. Lisp -- please explain
In-Reply-To: <7xu0arbkwd.fsf@ruckus.brouhaha.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>	<43f8ba1e$0$2895$626a54ce@news.free.fr>	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>	<43f8cb3f$0$4225$626a54ce@news.free.fr>	<87bqx3glb1.fsf@wilson.homeunix.com>	<43f984dc$0$27151$626a54ce@news.free.fr>	<873bienwlx.fsf@wilson.homeunix.com>
	<43fbc788@usenet01.boi.hp.com>	<87u0ar3gba.fsf@wilson.homeunix.com>	<pan.2006.02.22.11.35.14.90948@REMOVETHIScyber.com.au>	<1140612537.685150.68330@o13g2000cwo.googlegroups.com>
	<7xu0arbkwd.fsf@ruckus.brouhaha.com>
Message-ID: <dthrp4$rj2$1@sea.gmane.org>

Paul Rubin wrote:
> "Kay Schluehr" <kay.schluehr at gmx.net> writes:
> 
>>I talked to Richard Emslie recently and he told me that the PyPy team
>>works on a mechanism to create CPython-extension modules written in
>>RPython i.e. a statically translateable subset of Python. So even
>>without dynamic code specialization there will be an optimization path
>>based on the PyPy toolchain that is amazing. 

Well. "... the PyPy team works on ..." is definitively much too strong. 
It is more like "... the PyPy team is thinking about ...". It is very 
unclear whether it will work on a technical level and whether the EU 
will allow us to allocate resources accordingly.

> Sounds great but is that a whole lot different from pyrex?

Indeed, there are similarities to pyrex. Of course in pyrex you have to 
give the types yourself, but since the type inference engine of PyPy can 
sometimes be hard to understand this is maybe not the worst trade-off. A 
nice advantage of the PyPy approach would be that you can test your 
RPython code by running it on top of CPython until it works and only 
then translating it into C. Plus it would be possible to use the same 
extension module for PyPy, CPython and potentially even Stackless or 
Jython (if somebody writes a Java backend).

But as I said, this is all pretty unclear at the moment (and getting 
really quite off-topic for this thread).

Cheers,

Carl Friedrich



From cfbolz at gmx.de  Wed Feb 22 06:21:22 2006
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Wed, 22 Feb 2006 12:21:22 +0100
Subject: Writing my own typing monitor program for RSI sufferers...
In-Reply-To: <1140491147.433293.164700@g43g2000cwa.googlegroups.com>
References: <1140491147.433293.164700@g43g2000cwa.googlegroups.com>
Message-ID: <43FC4932.60305@gmx.de>

samslists at gmail.com wrote:
> I want to write a program that will let me know after thirty minutes of
> typing that I need to take a five minute typing break.  But when I stop
> typing it's smart enough to pause the 30 minute timer automatically.
> This is under the X-Window System (Linux).
> 
> The tricky part is obviously knowing when the mouse and keyboard are
> being used....especially when my application doesn't have the focus.
> 
> Obviously I can't do this with just the base python install.  Is there
> an add on library that I can use to monitor the keyboard and mouse?
> Which is it?  Maybe one of the graphical libraries, like wx, or qt, or
> gtk?  Which functions do I need?

You can do a bit of X hackery. Look for example at

http://www.softlab.ece.ntua.gr/~sivann/src/misc/xkey.c

which is a C program that prints keypresses (in any application). Should 
be fairly easy to turn into a Python extension module to monitor X activity.

Cheers,

Carl Friedrich Bolz



From mhellwig at xs4all.nl  Mon Feb 13 15:21:28 2006
From: mhellwig at xs4all.nl (Martin P. Hellwig)
Date: Mon, 13 Feb 2006 21:21:28 +0100
Subject: hard disk activity
In-Reply-To: <7xslqnul8b.fsf@ruckus.brouhaha.com>
References: <1139850420.902979.71620@o13g2000cwo.googlegroups.com>
	<g9i1v1lbf2rhmgskmkh5f9mt73s67umckk@4ax.com>
	<1139857505.376840.37440@g43g2000cwa.googlegroups.com>
	<7xslqnul8b.fsf@ruckus.brouhaha.com>
Message-ID: <43f0ea49$0$11071$e4fe514c@news.xs4all.nl>

Paul Rubin wrote:
> "VSmirk" <vania.smirk at gmail.com> writes:
>> I am needing to synchronize the file on a remote folder, and my current
>> solution, which simply copies the file if a date comparison or a
>> content comparison, becomes a bit unmanageable for very large files.
>> Some of the files I'm working with are hundreds of MB in size, or
>> larger.
> 
> Why don't you look at the rsync program:
> 
>   http://samba.anu.edu.au/rsync/
> 
> but for that much data, just plopping it all in a huge file is not
> a great approach if you can help it.  Maybe you can use a database instead.

Perhaps a cvs developer could also give some insight, you could check 
subversion's mailinglist (check their website for more info:
http://subversion.tigris.org/)

-- 
mph


From jstroud at ucla.edu  Thu Feb 23 19:57:37 2006
From: jstroud at ucla.edu (James Stroud)
Date: Thu, 23 Feb 2006 16:57:37 -0800
Subject: pyFltk-1.1
In-Reply-To: <mailman.2322.1140651210.27775.python-list@python.org>
References: <1140617661.603681.12250@z14g2000cwz.googlegroups.com>
	<mailman.2322.1140651210.27775.python-list@python.org>
Message-ID: <dtllm1$na3$1@daisy.noc.ucla.edu>

george williams wrote:
> By god this sounds interesting I wish I 
> knew what you are talking about
> George-- Original Message ----- 
> From: "andreas" <a.held at computer.org>
> Newsgroups: comp.lang.python.announce
> To: <comp-lang-python-announce at moderators.isc.org>
> Sent: Wednesday, February 22, 2006 6:14 AM
> Subject: ANN: pyFltk-1.1
> 
> 
> 
>>This is to announce the first official release of pyFltk-1.1,
>>the Python bindings for the cross platform GUI toolkit fltk-1.1



This reminds me, whatever happened to the FLWM? It was sweet.


From steve at holdenweb.com  Sat Feb 18 03:35:31 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 18 Feb 2006 03:35:31 -0500
Subject: python spawn new process, rout stdin/out
In-Reply-To: <1140216097.959490.306620@o13g2000cwo.googlegroups.com>
References: <1139523177.415107.291710@g47g2000cwa.googlegroups.com>	<BARGf.3747$MJ.3489@fed1read07>	<1140215344.231777.242000@o13g2000cwo.googlegroups.com>
	<1140216097.959490.306620@o13g2000cwo.googlegroups.com>
Message-ID: <dt6m8b$vas$2@sea.gmane.org>

kmkz wrote:
> ok solved that by using the call() method
> 
> I now have a bigger problem: the executable always wants to open in its
> own window. how do I stop this?
> 
Call pythonw instead of python.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From hancock at anansispaceworks.com  Sun Feb  5 20:21:35 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Sun, 5 Feb 2006 19:21:35 -0600
Subject: A problem with some OO code.
In-Reply-To: <1139075482.510942.71640@z14g2000cwz.googlegroups.com>
References: <1139055710.688193.81000@z14g2000cwz.googlegroups.com>
	<pan.2006.02.04.14.34.32.494116@REMOVETHIScyber.com.au>
	<1139075482.510942.71640@z14g2000cwz.googlegroups.com>
Message-ID: <20060205192135.169af136@samwise.anansi>

On 4 Feb 2006 09:51:22 -0800
"TPJ" <tprimke at interia.pl> wrote:
> 1) In OO vocabulary, class is something like template for
> an object. But I think the word "object" has something
> different meaning in Python. In general I don't use the
> word "object" in the same meaning, that it is used by
> Python. I try to use words in the same way, that they
> are used in OO.
> Sometimes I use the word "class" to talk about template
> (for an object), and the word "instance" to talk about an
> object of some class, but the only reason I do it is to
> distinguish between OO-object and Python-object.

"Object" in fact means *exactly* the same thing in Python
that it does in any other OOP language.  The only issue is
that *anything*, even simple things like integers, are
*objects* in Python. So, saying "object" (versus something
else) doesn't mean much that we didn't already know -- if
the program can manipulate it, then it's an "object".

Saying a "class instance" or just "instance" for short is a
way of specifically saying that it is a *user defined
object* that we are talking about, created from a "class"
(of course the "class" is *also* an object, and you can even
make objects that make classes -- I think that's what a
"metaclass" is, though I get fuzzy past that point). Usually
the point, though, is to draw attention to what class it is
an instance of.

A class *is* probably describable as a "template" for an
object, although the word "template" has a technical
meaning, too, IIRC, which might not be totally consistent
with that.  More to the point, though, classes are "instance
factories" in Python.  It's almost as if a class is nothing
more than a special category of functions that return
instances.

I don't know if I've helped at all, but I hope so. ;-)

Cheers,
Terry

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From michaeltaft at gmail.com  Tue Feb  7 01:09:11 2006
From: michaeltaft at gmail.com (mwt)
Date: 6 Feb 2006 22:09:11 -0800
Subject: Code Feedback
In-Reply-To: <1139269224.874385.24290@f14g2000cwb.googlegroups.com>
References: <1139247238.520281.144670@f14g2000cwb.googlegroups.com>
	<pan.2006.02.06.21.37.32.698385@wolf.com>
	<mailman.1526.1139264554.27775.python-list@python.org>
	<1139269224.874385.24290@f14g2000cwb.googlegroups.com>
Message-ID: <1139292551.595649.114920@z14g2000cwz.googlegroups.com>

Thanks for all the feedback.
Interestingly, I can't seem to get Dan M's code:
[code]
try:
          while 1:
                pass
      except KeyboardInterrupt:
          break
[/code]
to work, no matter how many variations I try (including adding in
"time.sleep(0.1)" as Peter Hansen suggested. The program just continues
to execute, ignoring the command to stop. I'm guessing that this has
something to do with the fact that the Reader threads are still
running?

A further question: Can anyone point me to a good description of the
best way to write/use doc strings in Python?



From rridge at csclub.uwaterloo.ca  Sat Feb 25 13:20:00 2006
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 25 Feb 2006 10:20:00 -0800
Subject: Pure python implementation of string-like class
In-Reply-To: <mailman.2433.1140880297.27775.python-list@python.org>
References: <20060225.102645.74687871.kayama@st.rim.or.jp>
	<mailman.2433.1140880297.27775.python-list@python.org>
Message-ID: <1140891600.822510.189140@v46g2000cwv.googlegroups.com>


Steve Holden wrote:
> "Wider than UTF-16" doesn't make sense.

It makes perfect sense.

                                                              Ross
Ridge



From frithiof.jensen at die_spammer_die.ericsson.com  Wed Feb  8 07:42:54 2006
From: frithiof.jensen at die_spammer_die.ericsson.com (Frithiof Andreas Jensen)
Date: Wed, 8 Feb 2006 13:42:54 +0100
Subject: critique my code, please
References: <mailman.1488.1139232769.27775.python-list@python.org>
Message-ID: <dscp0e$duq$1@news.al.sw.ericsson.se>


"Brian Blais" <bblais at bryant.edu> wrote in message
news:mailman.1488.1139232769.27775.python-list at python.org...
> Hello,
>
> I am including at the end of this document (is it better as an
attachment?) some code
> for a small gui dialog.  Since I am quite new to this, if anyone has any
suggestions
> for improvements to the code, bad coding practices, poor gui design,
etc... I'd love
> to hear it.

The GUI is "welded" to the application.

I much prefer to see a program split into a command-ling "engine"
application and a (or more) "GUI", "CLI" e.t.c. interface applications that
can connect to the engine and drive it. That way it is possible to script
the application.




From robin.meier at gmail.com  Mon Feb 27 20:16:14 2006
From: robin.meier at gmail.com (robin)
Date: 27 Feb 2006 17:16:14 -0800
Subject: changing params in while loop
Message-ID: <1141089374.340287.266970@u72g2000cwu.googlegroups.com>

hi,

i'm a newbie, but please bear with me for a second.
i have this function inside a while-loop, which i'd like to loop
forever, but i'm not sure about how to change the parameters of my
function once it is running.
what is the best way to do that? do i have to use threading or is there
some simpler way?
here's some code to show the structure of the problem:

from time import *

b = 44

def printStuff(a):
	print a
	sleep(1)
	print b
	sleep(1)

while 1:
	printStuff("bibi")

now how can i make printStuff() print "fifi" instead of "bibi" or 88
instead of 44 once it is running?

thank y'all for your help
do the snake!

robin



From http  Fri Feb 24 16:48:06 2006
From: http (Paul Rubin)
Date: 24 Feb 2006 13:48:06 -0800
Subject: A C-like if statement
References: <hp-dnY20cusOnGPeRVn-rg@nmt.edu> <dtl04p$5q2$1@reader2.panix.com>
	<1140809412.375118.291480@u72g2000cwu.googlegroups.com>
Message-ID: <7x3bi8xwbt.fsf@ruckus.brouhaha.com>

"Kay Schluehr" <kay.schluehr at gmx.net> writes:
> Hmm. A statement has side-effects but it returns no value. And yes, you
> can create a name within an expression producing a value in Python,
> using a list/generator comprehension. The solution to Bob's problem
> would look like this:
> 
> if (I for I in (a.find("3"),) ) != -1:
>      print "It's here: ", I
> else:
>      print "No 3's here"

I think that works for list comprehensions but not generator
comprehensions.  With generator comprehensions, the index variable's
scope is limited to the comprehension.  With list comprehensions
there's a wart in that the index variable is still around afterwards.


From onurb at xiludom.gro  Wed Feb 15 06:43:22 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Wed, 15 Feb 2006 12:43:22 +0100
Subject: Which is faster? (if not b in m) or (if m.count(b) > 0)
In-Reply-To: <1139976842.179801.285400@z14g2000cwz.googlegroups.com>
References: <1139976842.179801.285400@z14g2000cwz.googlegroups.com>
Message-ID: <43f313f7$0$32162$626a54ce@news.free.fr>

Farel wrote:
> Which is Faster in Python and Why?

Why don't you try by yourself ?
hint :
from timeit import Timer
help(Timer)


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From franz.steinhaeusler at gmx.at  Fri Feb 24 06:37:44 2006
From: franz.steinhaeusler at gmx.at (Franz Steinhaeusler)
Date: Fri, 24 Feb 2006 12:37:44 +0100
Subject: regular expresson for Unix and Dos Lineendings wanted
References: <jterv157550g4qd4rosc3a2o8l69gcau8v@4ax.com>
	<mailman.2346.1140703308.27775.python-list@python.org>
	<ujgrv19d4thh28cvh4emqi2m1p5g1gofuh@4ax.com>
	<mailman.2361.1140716519.27775.python-list@python.org>
	<sgrtv1l4uhbjrr1th8a7g3sdsb57bkt38h@4ax.com>
Message-ID: <lvrtv1lqfp6kj8g3fn5p0bp7qmicf5pogt@4ax.com>

On Fri, 24 Feb 2006 12:36:01 +0100, Franz Steinhaeusler
<franz.steinhaeusler at gmx.at> wrote:

>if n > 1:

if n > 0: (of course) :-)

-- 
Franz Steinhaeusler


From apgwoz at gmail.com  Thu Feb 16 09:31:30 2006
From: apgwoz at gmail.com (Andrew Gwozdziewycz)
Date: Thu, 16 Feb 2006 09:31:30 -0500
Subject: web crawler in python or C?
In-Reply-To: <1140069412.051298.242150@g44g2000cwa.googlegroups.com>
References: <1140069412.051298.242150@g44g2000cwa.googlegroups.com>
Message-ID: <8ba244fb0602160631g31cd7409x30b4fbd8a346ed6b@mail.gmail.com>

On 15 Feb 2006 21:56:52 -0800, abhinav <abhinavduggal at gmail.com> wrote:
> Hi guys.I have to implement a topical crawler as a part of my
> project.What language should i implement
> C or Python?

Why does this keep coming up on here as of late? If you search the
archives, you can find numerous posts about spiders. One interesting
fact is that google itself starting with their spiders in python.
http://www-db.stanford.edu/~backrub/google.html I'm _sure_ it'll work
for you.



--
Andrew Gwozdziewycz <apgwoz at gmail.com>
http://ihadagreatview.org
http://plasticandroid.org


From fredrik at pythonware.com  Thu Feb 16 03:21:18 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Feb 2006 09:21:18 +0100
Subject: text encodings -> subprocess.Popen or -> labelmarkup (pygtk)
References: <slrndv8c14.vea.mac@news.calmar.ws>
Message-ID: <dt1clv$qjv$1@sea.gmane.org>

"calmar" wrote:

> Then I think, 'what' kind of encoding I can send to an external program,
> depends also on that program?

the encoding is a mapping between raw bytes and their actual meaning,
and a program usually only sees the bytes, so it's entirely up to the pro-
gram to interpret what you send to it.

many programs defaults to the system's "global" default encoding for text
input; you can use the "getpreferredencoding" function in the locale module
to figure out what it is set to:

    http://docs.python.org/lib/module-locale.html

</F>





From erniedude at gmail.com  Tue Feb  7 09:50:14 2006
From: erniedude at gmail.com (Ernesto)
Date: 7 Feb 2006 06:50:14 -0800
Subject: * 'struct-like' list *
In-Reply-To: <1139279974.075753.299710@g14g2000cwa.googlegroups.com>
References: <1139245389.529742.317110@g43g2000cwa.googlegroups.com>
	<1139279974.075753.299710@g14g2000cwa.googlegroups.com>
Message-ID: <1139323814.071618.109950@z14g2000cwz.googlegroups.com>

Thanks for the approach.  I decided to use regular expressions.  I'm
going by the code you posted (below).  I replaced the line re.findall
line with my file handle read( ) like this:

print re.findall(pattern, myFileHandle.read())

This prints out only brackets [].  Is a 're.compile' perhaps necessary
?


Raymond Hettinger wrote:

> # Approach for more loosely formatted inputs
> import re
> pattern = '''(?x)
>     Name:\s+(\w+)\s+
>     Age:\s+(\d+)\s+
>     Birthday:\s+(\d+)\s+
>     SocialSecurity:\s+(\d+)
> '''
> print re.findall(pattern, inputData)



From daniel.dittmar at sap.corp  Fri Feb 24 12:45:49 2006
From: daniel.dittmar at sap.corp (Daniel Dittmar)
Date: Fri, 24 Feb 2006 18:45:49 +0100
Subject: Module written in C does not repond to Ctrl-C interruption.
In-Reply-To: <468qvoF9r91vU1@uni-berlin.de>
References: <dtnak6$aku$1@joe.rice.edu> <468qvoF9r91vU1@uni-berlin.de>
Message-ID: <dtngoc$6og$1@news.sap-ag.de>

Diez B. Roggisch wrote:
> """
> Although Python signal handlers are called asynchronously as far as the
> Python user is concerned, they can only occur between the ``atomic''
> instructions of the Python interpreter. This means that signals arriving
> during long calculations implemented purely in C (such as regular
> expression matches on large bodies of text) may be delayed for an arbitrary
> amount of time. 
> """
> 
> So - no workaround here, unless you patch python.

You could set up your own signal handler when entering the C extension. 
This should abort the extension (tricky) and call the Python signal handler.

Daniel


From onurb at xiludom.gro  Wed Feb  8 08:27:36 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Wed, 08 Feb 2006 14:27:36 +0100
Subject: 450 Pound Library Program
In-Reply-To: <1139351498.090768.82270@o13g2000cwo.googlegroups.com>
References: <1139351498.090768.82270@o13g2000cwo.googlegroups.com>
Message-ID: <43e9f1e1$0$612$636a15ce@news.free.fr>

mwt wrote:
> So in a further attempt to learn some Python, I've taken the little
> Library program
> (http://groups.google.com/group/comp.lang.python/browse_thread/thread/f6a9ccf1bc136f84)
> I wrote and added several features to it. Readers now quit when they've
> read all the books in the Library. Books know how many times they've
> been read. Best of all, you can now create your own list of books to
> read!
> 
> Again, the point of all this is to get used to programming in Python.
> So although the program is trivial, any feedback on style, structure,
> etc. would be much appreciated. I'm a convert from Java,

Welcome !-)

> so I've
> probably got some unconscious Javanese in there somewhere. Help me get
> rid of it!

Well, apart from namingConventions (vs naming_conventions), I did not
spot too much javaism in your code.

> Here's the new, improved program:
> [code]
> #!/usr/bin/python
> # Filename: Library.py
> # author: mwt
> # Feb, 2006
> 
> import thread
> import time
> import threading
> import random
> 
> 
> 
> class Library2:

Old-style classes are deprecated, use new-style classes instead:
class Library2(object):

>     def __init__(self, listOfBooks, totalBooks):
>         self.stacks = listOfBooks

If its a collection of books, why not call it 'books' ?

>         self.cv = threading.Condition()
>         self.totalBooks = totalBooks

What is 'totalBooks' ?

>     def checkOutBook(self, readerName):
>         "'Remove book from the front of the list, block if no books are
> available'"

Why not using triple-quoted strings ?

>         self.cv.acquire()
>         while len(self.stacks) == 0:
>             self.cv.wait()
>             print "%s waiting for a book..." %readerName
>         book = self.stacks.pop(0)

This last line will crash (IndexError) on an empty list, and then the
resource may not be released... A first step would be to enclose this in
a try/finally block.

>         self.cv.release()
>         return book
> 
>     def returnBook(self, returnedBook):
>         "'put book at the end of the list, notify that a book is
> available'"
>         returnedBook.wasRead()
>         self.cv.acquire()
>         self.stacks.append(returnedBook)
>         self.cv.notify()
>         self.cv.release()

You have a recurring pattern in the last 2 methods: aquire/do
something/release. You could factor this out in a method decorator
(don't forget that functions and methods are objects too, so you can do
a *lot* of things with them).

> class Reader(threading.Thread):
> 
>     def __init__(self, library, name, readingSpeed, timeBetweenBooks):
>         threading.Thread.__init__(self)
or :
          super(Reader, self).__init__()

but this wouldn't make a big difference here

>         self.library = library
>         self.name = name
>         self.readingSpeed = readingSpeed
>         self.timeBetweenBooks = timeBetweenBooks
>         self.book = ""

You later user Reader.book to hold a reference to a Book object, so it
would be wiser to initialize it with None.

>         self.numberOfBooksRead = 0
> 
>     def run(self):
>         "'Keep checking out and reading books until you've read all in
> the Library'"
>         while  self.numberOfBooksRead < self.library.totalBooks:
>             self.book = self.library.checkOutBook(self.name)
>             print "%s reading %s" %(self.name, self.book.title),
>             time.sleep(self.readingSpeed)
>             self.numberOfBooksRead += 1
>             self.library.returnBook(self.book)
>             print "%s done reading %s" %(self.name, self.book.title),
>             print"Number of books %s has read: %d" %(self.name,
> self.numberOfBooksRead)
>             self.bookName = ""
>             time.sleep(self.timeBetweenBooks)
>         print "%s done reading." %self.name
> 
> class Book:
>     def __init__(self, author, title):
>         self.author = author
>         self.title = title
>         self.numberOfTimesRead = 0
>         #print "%s,%s" % (self.author, self.title),#print as books are
> loaded in
> 
>     def wasRead(self):
>         self.numberOfTimesRead += 1
>         print "Number of times %s has been read: %d" %(self.title,
> self.numberOfTimesRead)
> 
> if __name__=="__main__":
> 

You should define a main() function and call it from here.

>     print "\nWELCOME TO THE THURMOND STREET PUBLIC LIBRARY"
>     print "Checking which books are avialable...\n"
s/avialable/available/ !-)

>     try:
>         theBookFile = open("books.txt", "r")#Create your own list of
> books!

Filenames should not be hardcoded.

(Ok, you probably know this already, but I thought it would be better to
point this out for newbie programmers)

>         stacks = []#a place to put the books
>         for line in theBookFile.readlines():
>             L = line.split (",")  # a comma-delimited list

Mmm... may not be the best format. What if there are commas in the book
title ? Hint : there's a CSV module in the standard lib.

Also, by convention, UPPERCASE identifiers are considered as CONSTANTS

>             author = L[0]
>             bookName =  L[1]
>             newBook = Book(author, bookName)
>             stacks.append(newBook)

You can smash all this in a single line:
       stacks = [Book(line.split(",", 1) for line in theBookFile]

>         theBookFile.close()
>     except IOError:
>         print "File not found!"

An IOError can result from a lot of different reasons (like user not
having read access on the file). So don't assume the file was not found:

       except IOError, e:
          print "Could not open file %s : %s" % ('books.txt', e)

You may also want to exit here...

>     #string = "How many books would you like in the Library?[1-" +
> str(len(stacks)) + "]"
>     totalBooks = input("How many books would you like in the
> Library?[1-" + str(len(stacks)) + "]")

1/ use raw_input() and *validate* user data

2/ use string formatting:
      prompt = "How many books would you like in the "
               " Library? [1-%d]" % len(stacks)

>     stacks[totalBooks: len(stacks)] = []
      stacks = stacks[:totalBooks]

May be less efficient, but much more readable IMHO.

Also, the naming is somewhat misleading. Something along the line of
numberOfBooks or booksCount would probably be better.

>     print "Number of books in the Library is:", len(stacks)

You've called len(stacks) 3 times in 3 lines.

>     library = Library2(stacks, totalBooks)

What's the use of totalBooks here ? The Library2 class can figure it out
by itself, so it's useless - and it goes against DRY and SPOT.

hint: given the use of Library.totalBook, you'd better make it a
computed attribute

class LibraryN(object):
  booksCount = property(fget=lambda self: len(self.books))

>     readers = input("\nHow many readers would you like?")

idem. Also, something like readersCount would be less misleading (I
first thought it was a collection of Reader objects)

>     print "Number of readers is:", readers, "\n"
>     for i in range(0,readers):
>        newReader = Reader(library, "Reader" + str (i),
> random.randint(1,7), random.randint(1,7))

performance hint: names are first looked up in the local namespace:

      randint = random.randint
      for i in range(0, readers):
         newReader = Reader(library,
                            "Reader%d" % i,
  			     randint(1,7),
                             randint(1,7))

>        newReader.start()

My 2 cents...

(snip)

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From jgardner at jonathangardner.net  Fri Feb 17 02:19:16 2006
From: jgardner at jonathangardner.net (Jonathan Gardner)
Date: 16 Feb 2006 23:19:16 -0800
Subject: Databases and python
In-Reply-To: <pan.2006.02.17.04.15.51.234331@dcs.nac.uci.edu>
References: <pan.2006.02.14.08.06.18.754312@dcs.nac.uci.edu>
	<1140075451.474898.106320@g43g2000cwa.googlegroups.com>
	<pan.2006.02.17.04.15.51.234331@dcs.nac.uci.edu>
Message-ID: <1140160756.851797.116450@g43g2000cwa.googlegroups.com>

About the filename ID - word ID table: Any good database (good with
large amounts of data) will handle the memory management for you. If
you get enough data, it may make sense to get bothered with PostgreSQL.
That has a pretty good record on handling very large sets of data, and
intermediate sets as well. Again, I can't speak about BDBs, but
something in the back of my head is saying that the entire table is
loaded into memory. If so, that's not good for large sets of data.

About base255: You can think of strings as numbers. At least, that's
how your computer sees them. Converting a number to base255 is really
silly. If it's a series of bytes (like a Python string is) then base255
is a string. You want to use an incremented number for the ID because
there are some indexes that deal with this kind of data very, very
well. If you have your number spread out like a shotgun, with clusters
here and there, the index might not be very good.

About using many tables: The best answer you are going to get is a
bunch of files---one for each word---with the names or IDs of the
files. You can store these in a single directory, or (as you'll find
out to be more efficient) a tree of directories. But this kind of data
is useless for reverse lookups. If you really do have so much data,
start using a real database that is designed to handle this kind of
data efficiently. The overhead of SQL parsing and network latency soon
gets dwarfed by lookup times anyway.



From tim at pollenation.net  Tue Feb  7 12:35:57 2006
From: tim at pollenation.net (Tim Parkin)
Date: Tue, 07 Feb 2006 17:35:57 +0000
Subject: Is Python good for web crawlers?
In-Reply-To: <1139333229.770945.215990@g43g2000cwa.googlegroups.com>
References: <1139330008.270988.227170@g44g2000cwa.googlegroups.com>	<mailman.1555.1139330693.27775.python-list@python.org>	<1139332188.851343.20580@g14g2000cwa.googlegroups.com>	<44s30nF38tqrU1@uni-berlin.de>
	<1139333229.770945.215990@g43g2000cwa.googlegroups.com>
Message-ID: <43E8DA7D.6030300@pollenation.net>

Tempo wrote:

>Does a web crawler have to download an entire page if it only needs to
>check if the product is in stock on a page? Or if it just needs to
>search for one match of a certain word on a page?
>
>  
>
Typically you would download the whole html file and then perform any
analysis on this. It is possible to parse the stream of characters as
they come back from the server but this would statistically only reduce
the download time by a half (presuming the item you want is of a single
byte in length and can appear anywhere in the html). In reality, unless
the pages you are requesting are very large (200k+) or your bandwidth
very expensive (in time and/or capacity) then it is probably easier for
you to just download the whole file.

I would recommend that you use BeautifulSoup to parse badly formatted
html documents (which is most of the web). (google 'beautiful soup' and
you should find it easily).

Tim Parkin


From evan.monroig at gmail.com  Wed Feb 15 18:48:27 2006
From: evan.monroig at gmail.com (Evan Monroig)
Date: Thu, 16 Feb 2006 08:48:27 +0900
Subject: Encryption application/NEED A HACKER TO TRY IT
In-Reply-To: <cda778180602150718o325826a6ga658b31339aa82d4@mail.gmail.com>
References: <cda778180602150718o325826a6ga658b31339aa82d4@mail.gmail.com>
Message-ID: <20060215234827.GA9993@localhost.localdomain>

On Feb.15 18h18, atanas Cosmas Nkelame wrote :
> I got an idea to write a python application which ciphers and 
> enciphers informationation (converting it to a format which only the 
> person who changed it understands as he is the only one who has the 
> program to decode the information).

Hi,

It is likely that the strong encryption provided by pgp or gpg 
(www.gnupg.org) are exactly what you are looking for.

cheers,

Evan


From spe.stani.be at gmail.com  Sun Feb 19 12:23:48 2006
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 19 Feb 2006 09:23:48 -0800
Subject: [ANN] SPE IDE videos and more...
Message-ID: <1140369828.680528.19070@o13g2000cwo.googlegroups.com>

I'm happy to spread the word about showmedo.com, an excellent
collection of python programming videos.

>From the website
http://showmedo.com/videoListPage?listKey=TheBigPythonList:

"""Want to learn how to use some of the best Python programming tools
out there, including the supercharged IPython interpreter and the great
free editor SPE? Or maybe you want to see how easy it is to create
great-looking, powerful graphical user interfaces using wxPython. If
so, take a gander at the videos below."""

They have two SPE specific videos:

"""
Python with Stani's Python Editor (SPE)

Two videos to demonstrate editing and debugging of Python code using
the excellent SPE toolkit.

Python Development and Navigation with SPE
------------------------------------------------------------------
SPE is a well-featured cross-platform development environment for
Python. Here I show you how to write a simple Python program, save the
code, run it and navigate using the Explorer, Index and UML Viewer.
Complimentary material can be found in the manual and the tutorial at
http://www.serpia.org.

Debugging with WinPDB from Within SPE
------------------------------------------------------------------
The WinPDB graphical debugger can be launched from within SPE to debug
Python code. Here I show how to launch the debugger, step through the
code and stack frame, inspect variables and exit back to SPE. I also
explain the significance of the Magic Letters.
"""

The SPE videos area available at the url:
http://showmedo.com/videoListPage?listKey=PythonDevelopmentWithSPE.

Contribute back to your favorite open source projects by submitting
your own python videos to this wonderfull project! If you need
inspiration look at the requested videos: http://showmedo.com/requests
Who will make the first wxGlade video? Anyone who contributes a video
can request a SPE pdf manual as a reward.

Stani

--
http://pythonide.stani.be
http://pythonide.stani.be/screenshots
http://pythonide.stani.be/manual/html/manual.html
--

PS Other python videos have as topic:
"""
Beginning Python
------------------------------------------------------------------
Three videos covering the download and installation of the Python
programming language on a Windows machine and a small introduction to
the Python interpreter.

Python Development with IPython
------------------------------------------------------------------
Four videos leading you through the installation and basic mastery of
the powerful IPython interactive Python environment

Python GUI Programming with wxPython
------------------------------------------------------------------
A series of videos for beginners showing how easy it is to quickly
develop professional looking graphical user interfaces exploiting the
ease and power of the Python programming language. wxPython is fast
becomming one of the most popular cross-platform GUI programming
solutions. This set of videos aims to show you why.

"""



From siona at chiark.greenend.org.uk  Fri Feb 10 07:20:13 2006
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 10 Feb 2006 12:20:13 +0000 (GMT)
Subject: Determining an operating system's default browser
References: <mailman.1690.1139528346.27775.python-list@python.org>
Message-ID: <XBo*-eY+q@news.chiark.greenend.org.uk>

John McMonagle  <johnmc at velseis.com.au> wrote:
>Is there a python module which can determine an operating system's
>default web browser application.

http://docs.python.org/lib/module-webbrowser.html

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From dr.addn at gmail.com  Thu Feb  2 17:32:19 2006
From: dr.addn at gmail.com (Ph.T)
Date: Thu, 2 Feb 2006 14:32:19 -0800
Subject: beta.python.org content
In-Reply-To: <drsp2b$r2c$1@nntp0.reith.bbc.co.uk>
References: <mailman.1094.1138298277.27775.python-list@python.org>
	<1138370625.657953.320070@g49g2000cwa.googlegroups.com>
	<drsp2b$r2c$1@nntp0.reith.bbc.co.uk>
Message-ID: <8fd4a2fe0602021432m37d33813qdaf44cfa3bc603fa@mail.gmail.com>

On 2/2/06, Michael Sparks <michaels at rd.bbc.co.uk> wrote:
>
>
>    [1] NB: I **really** wouldn't go to python.com, I REALLY wasn't
>         expecting that.... (REALLY)
>

. I wouldn't even p y t h o n . c o m -- gmail keeps throwing these into the
spam bucket .
--
American Dream Documents
http://www.geocities.com/amerdreamdocs/home/
"(real opportunity starts with real documentation)
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From __peter__ at web.de  Mon Feb 20 06:39:50 2006
From: __peter__ at web.de (Peter Otten)
Date: Mon, 20 Feb 2006 12:39:50 +0100
Subject: cElementTree encoding woes
References: <45tkj3F8d9fpU1@uni-berlin.de>
Message-ID: <dtc9mn$pn3$03$1@news.t-online.com>

Diez B. Roggisch wrote:

> I've got to deal with a pretty huge XML-document, and to do so I use the
> cElementTree.iterparse functionality. Working great.
> 
> Only trouble: The guys creating that chunk of XML - well, lets just say
> they are "encodingly challanged", so they don't produce utf-8, but only
> cp1252 instead, together with some weird name (Windows-1252) for that.
> That is not part of the standard codecs module. cp1252 is, of course.
> 
> But that won't work for iterparse. So currently, I manually change the
> encoding given to utf-8, and use a stream-recoder.
> 
> However, I was wondering if I could teach cElementTree about that encoding
> name. I tried to register cp1252 under the name Windows-1252, but had no
> luck - cET won't buy it.
> 
> Any suggestions?

Both my python2.3 and python2.4 interpreters seem to know "Windows-1252":

>>> import codecs
>>> codecs.open("windows.xml", encoding="windows-1252")
<open file 'windows.xml', mode 'rb' at 0x403737e0>

Maybe the problem lies in the python installation rather than cElementTree?
Just guessing, though.

Peter



From harlinseritt at yahoo.com  Mon Feb 13 09:56:46 2006
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 13 Feb 2006 06:56:46 -0800
Subject: FTPlib
Message-ID: <1139842605.976288.243880@g14g2000cwa.googlegroups.com>

Using ftplib from Python I am trying to get all files in a particular
directory using ftplib and then send those same files to another ftp
server. I have tried using commands like 'get *' and 'mget *' with no
success.

I am using the following:

srcFtp = FTP(srcHost)
srcFtp.login(srcUser, srcPass)
srcDir = srcFtp.nlst('.')
for file in srcDir:
    print file[2:]
    srcFtp.transfercmd('get '+file[2:])

I've verified that I do have a connection with the ftp server and the
files as 'file[2:]' are indeed the file names.

Anyone know why I get the following error?

podcast-1.mp3
Traceback (most recent call last):
  File "podsync.py", line 17, in ?
    srcFtp.transfercmd('get '+file[2:])
  File "C:\Python24\lib\ftplib.py", line 345, in transfercmd
    return self.ntransfercmd(cmd, rest)[0]
  File "C:\Python24\lib\ftplib.py", line 327, in ntransfercmd
    resp = self.sendcmd(cmd)
  File "C:\Python24\lib\ftplib.py", line 241, in sendcmd
    return self.getresp()
  File "C:\Python24\lib\ftplib.py", line 216, in getresp
    raise error_perm, resp
ftplib.error_perm: 500 Syntax error, command unrecognized.

Thanks,

Harlin Seritt



From no at spam  Tue Feb 21 12:19:24 2006
From: no at spam (D H)
Date: Tue, 21 Feb 2006 11:19:24 -0600
Subject: Python vs. Lisp -- please explain
In-Reply-To: <1140415281.679774@jetspin.drizzle.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<mailman.2132.1140378051.27775.python-list@python.org>
	<yfs7j7roth2.fsf@oc.ex.ac.uk>
	<1140415281.679774@jetspin.drizzle.com>
Message-ID: <S8qdnamAGrwB1mbeRVn-tA@comcast.com>

Donn Cave wrote:
> I can say "Python can serve as a scripting language for some applications",
> but not "Python is a scripting language!"

bruno at modulix wrote:
 > as soon as you say "interpreted, scripting", peoples think "not
 > serious".

Cameron Laird wrote:
 > I *think* you're proposing that,
 > were Guido more knowledgeable, he would have created a Python
 > language that's roughly as we know now, implemented it with
 > FASTER software ... and "to its own detriment".

Fredrik Lundh wrote:
 > define "scripting language".
 >
 > the only even remotely formal definition I've ever seen is "language
 > with designed to script an existing application, with limited support
 > for handling
 > its own state".  Early Tcl and JavaScript are scripting languages,
 > Python is not.

Kay Schluehr wrote:
 > Yes, it's Guidos master-plan to lock programmers into a slow language
 > in order to dominate them for decades.

Donn Cave wrote:
 > All I'm saying is that Python matches
 > what people think of as an interpreted language.  You can deny it, but
 > but it's going to look like you're playing games with words, and to no
 > real end, since no one could possibly be deceived for very long.

Steven D'Aprano wrote:
 > Describing C (or Lisp) as "compiled" and Python as "interpreted" is to
 > paint with an extremely broad brush, both ignoring what actually
 > happens in fact, and giving a false impression about Python. It is
 > absolutely true to say that Python does not compile to machine code.
 > (At least not yet.) But it is also absolutely true that Python is
 > compiled. Why emphasise the interpreter, and therefore Python's
 > similarity to bash, rather than the compiler and Python's similarity
 > to (say) Java or Lisp?

Paul Boddie wrote:
 > Yes, I think that with optional static typing, it's quite likely that
 > we would see lots of unnecessary declarations and less reusable code
 > ("ints everywhere, everyone!"), so I think the point about not
 > providing people with certain features is a very interesting one,
 > since
 > people have had to make additional and not insignificant effort to
 > optimise for speed. One potential benefit is that should better tools
 > than optional static typing be considered and evaluated, the "ints
 > everywhere!" line of thinking could prove to be something of a dead
 > end
 > in all but the most specialised applications. Consequently, the Python
 > platform could end up better off, providing superior tools for
 > optimising performance whilst not compromising the feel of the
 > language
 > and environment.

Torsten Bronger wrote:
 > By the way, this is my main concern about optional static typing: It
 > may change the target group, i.e. it may move Python closer to those
 > applications where speed really matters, which again would have an
 > effect on what will be considered Pythonic.

Steven D'Aprano wrote:
 > The "Python is both interpreted and compiled" camp, who
 > believe that both steps are equally important, and to
 > raise one over the other in importance is misleading.
 > That's why Sun doesn't describe Java as interpreted,
 > but as byte-code compiled. They did that before they
 > had JIT compilers to compile to machine code.

Bruno Desthuilliers wrote:
 > It's not a "scripting" language, and it's not interpreted.


It will all be sorted out once and for all in Python 3000: The Reckoning


From peter at engcorp.com  Sat Feb 25 07:51:48 2006
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 25 Feb 2006 07:51:48 -0500
Subject: Import in a separate thread
In-Reply-To: <1140869286.548125.17710@p10g2000cwp.googlegroups.com>
References: <1140869286.548125.17710@p10g2000cwp.googlegroups.com>
Message-ID: <dtpjt2$cua$1@sea.gmane.org>

cyberco wrote:
> I want to import a long list of modules in a separate thread to speed
> things up. How can I make the modules imported in that separate thread
> accessible outside the method?

Sounds like premature optimization.  Speed "things" up?  What things? 
How long is it taking now to load the modules you are loading?  Even the 
wxPython demo takes only a few seconds to load on a decent machine, and 
that's loading a *heck* of a lot of stuff.  (And it takes the 
conventional approach to this issue too, which is to display a splash 
screen while things load.)

-Peter



From jjcassidy at gmail.com  Fri Feb 24 20:52:52 2006
From: jjcassidy at gmail.com (jjcassidy at gmail.com)
Date: 24 Feb 2006 17:52:52 -0800
Subject: Playing with modules
In-Reply-To: <1140826926.993654.188640@j33g2000cwa.googlegroups.com>
References: <1140808435.311458.86770@z34g2000cwc.googlegroups.com>
	<1140826926.993654.188640@j33g2000cwa.googlegroups.com>
Message-ID: <1140832372.203415.203090@p10g2000cwp.googlegroups.com>

> You're going to have to create the home.base module somewhere. If you
> want to put in that some code that basically imports another module's
> namespace into the home.base module's namespace, then that may do what
> you want.

Thanks, Jonathon, but I think I've tried what you are saying. I've
tried doing this a couple different ways.

I suppose that what I could do is go somewhat explicit, and instead of
trying to exploit the natural import language, create a method for this
such as home.use('base') which could use even use the tracestack, get
the current frame's globals and stick the entry { 'base': <module
'cassidy.base' from 'C:\Dev\Python24\lib\cassidy\base\__init__.pyc'> }
into the currect scope and just make that part of the "API".

But I was wondering whether I could fool or "backend" the normal import
mechanism. Even in Java, I can write my own class loader which can
quick compile Java snippets and load the anonymous byte code.

Thanks, 

John



From steve at REMOVETHIScyber.com.au  Fri Feb 10 19:31:08 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sat, 11 Feb 2006 11:31:08 +1100
Subject: absolute removal of '\n' and the like
References: <1139613718.688010.216370@z14g2000cwz.googlegroups.com>
Message-ID: <pan.2006.02.11.00.31.07.559200@REMOVETHIScyber.com.au>

On Fri, 10 Feb 2006 15:21:58 -0800, S Borg wrote:

> Hello,
> 
>  If I have a string, what is the strongest way to assure the
> removal of any line break characters?

What do you mean "strongest"? Fastest, most memory efficient, least lines
of code, most lines of code, least bugs, or just a vague "best"?


> Line break characters must always be the last character in a line, 

Must they? Are you sure? What happens if the file you are reading from
doesn't end with a blank line?


> so would this:    str = linestring[:-1]
>  work?

Using the name of a built-in function (like str) is called shadowing. It
is a BAD idea. Once you do that, your code can no longer call the built-in
function.

s = line[:-1] will work if you absolutely know for sure the line ends with
a newline.

This would be safer, if you aren't sure:

if line[-1] == '\n':
    s = line[:-1]
else:
    s = line

but that assumes that line is a non-empty string. If you aren't sure about
that either, this is safer still:

if line and line[-1] == '\n':
    s = line[:-1]
else:
    s = line

If you want to clear all whitespace from the end of the line, not just
newline, this is better still because you don't have to do any tests:

s = line.rstrip()

There is also a lstrip to strip leading whitespace, and strip() to strip
both leading and trailing whitespace.



-- 
Steven.



From pydecker at gmail.com  Fri Feb 17 09:26:25 2006
From: pydecker at gmail.com (Peter Decker)
Date: Fri, 17 Feb 2006 09:26:25 -0500
Subject: Evil, evil wxPython (and a glimmer of hope)
In-Reply-To: <1140127656.883147.100440@g44g2000cwa.googlegroups.com>
References: <1140116551.116322.12680@g43g2000cwa.googlegroups.com>
	<1140126748.067985.39760@g14g2000cwa.googlegroups.com>
	<1140127656.883147.100440@g44g2000cwa.googlegroups.com>
Message-ID: <ca55a9900602170626n22dbfcb8m3d92f6fb035f0d81@mail.gmail.com>

On 16 Feb 2006 14:07:36 -0800, vivainio at gmail.com <vivainio at gmail.com> wrote:
> snoe wrote:
>
> > Take a look at dabo, II think they're doing exactly what you're
> > describing.
> > http://blog.dabodev.com/
>
> Dabo appear to be doing way more than what I want, with database access
> etc.

That was my first impression, too, but I tried it anyway. Turns out
that you can easily use just the dabo.ui module without ever having to
work with the database stuff.

--

# p.d.


From rainbow.cougar at gmail.com  Sun Feb 12 15:28:23 2006
From: rainbow.cougar at gmail.com (rainbow.cougar at gmail.com)
Date: 12 Feb 2006 12:28:23 -0800
Subject: Mental Abuse
In-Reply-To: <1139519949.266435.18420@o13g2000cwo.googlegroups.com>
References: <1139519949.266435.18420@o13g2000cwo.googlegroups.com>
Message-ID: <1139776103.836354.4320@o13g2000cwo.googlegroups.com>


khaccountant at yahoo.com wrote:
> My abuser has been using the medical device to harass me the last 4-5
> years. I have no idea what type of a device is being used on me. I
> believe the device is only available to licensed pharmacist(s). I am
> not very familiar with the intend usage of the device.

Can you say paranoid-schizophrenic?   I knew you could...



From steve at REMOVETHIScyber.com.au  Mon Feb 20 07:16:43 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Mon, 20 Feb 2006 23:16:43 +1100
Subject: Quesion about the proper use of __slots__
References: <1140424508.393412.79140@o13g2000cwo.googlegroups.com>
	<43f9825e$0$4777$636a55ce@news.free.fr>
	<1140426860.033363.237150@o13g2000cwo.googlegroups.com>
Message-ID: <pan.2006.02.20.12.16.43.85888@REMOVETHIScyber.com.au>

On Mon, 20 Feb 2006 01:14:20 -0800, Zefria wrote:

>>>> class Fighter(object):
> ...     '''Small one man craft that can only harm other fighters on
> their own.'''
> ...     __slots__ = ["fuel","life","armor","weapon","bulk"]
> ...     def __init__(self,statsTuple=(50,5,0,(2,4),1)):
> ...             self.fuel = statsTuple[0]
> ...             self.life = statsTuple[1]
> ...             self.armor = statsTuple[2]
> ...             self.weapon = statsTuple[3]
> ...             self.bulk = statsTuple[4]
> ...
>>>> examp = Fighter()
>>>> examp.rock = 3
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> AttributeError: 'Fighter' object has no attribute 'rock'
>>>>
> 
> Thank you both, I had tried making it a class variable and didn't see
> anything. The trick must have been in making a class that inheriets
> from object.

For technical reasons, __slots__ don't work as expected for old-style
classes, and never will. You have to inherit from object to make them work
correctly.


> Also, I don't generally do any optimization at all yet (as a highschool
> student projects get trashed often enough no to bother over), but in
> this special case I'm expecting each "carrier" to have up to 150
> fighters, and 3 to 5 carriers for each of the two teams, which comes
> out to be quite large.

750 objects is not very many, not unless they are carrying around large
chunks of data. And even then, using __slots__ saves only a small
amount of memory per object.

Write your code the slot-less way, see how it performs, and if it is slow,
change your class definition.



-- 
Steven.



From bdesth.quelquechose at free.quelquepart.fr  Sun Feb 19 16:06:33 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 19 Feb 2006 22:06:33 +0100
Subject: Python vs. Lisp -- please explain
In-Reply-To: <Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
Message-ID: <43f8ba1e$0$2895$626a54ce@news.free.fr>

DH a ?crit :
(snip)
> 
> It is by design. Python is dynamically typed.  It is essentially an 
> interpreted scripting language like javascript or ruby or perl,

It's not a "scripting" language, and it's not interpreted.

> although 
> python fans will be quick to tell you python is compiled to byte code. 

CQFD.


From hongyuan1306 at gmail.com  Thu Feb  9 11:05:23 2006
From: hongyuan1306 at gmail.com (Yuan HOng)
Date: Fri, 10 Feb 2006 00:05:23 +0800
Subject: Problem using epydoc with python2.4 and restructured text
Message-ID: <91320d220602090805k3cbc9db2x1327ea43df15e03f@mail.gmail.com>

I wish to document my project written in python2.4 with restructured
text syntax. From the various python documentation tools it seems only
epydoc supports rst as the documentation format.

It seems however that epydoc, the last version being 2.1 released in
2004, doesn't support python2.4 well. I tried on the file example
statemachine.py given on docutils.sourceforge.net, and below is the
result:

rhodium:~# epydoc --docformat restructuredtext statemachine.py
Importing 1 modules.
 [.]
Building API documentation for 1 modules.
 [.]
/usr/lib/python2.4/site-packages/epydoc/markup/restructuredtext.py:174:
DeprecationWarning: docutils.utils.Reporter.set_conditions deprecated;
set attributes via configuration settings or directly
 document.reporter.set_conditions('', 10000, 10000, None)
===========================================================================
/root/statemachine.py
In statemachine docstring (line 7):
---------------------------------------------------------------------------
    - Error: Internal error: 'int' object is not callable

===========================================================================
/root/statemachine.py
In statemachine.string2lines docstring (line 1459):
---------------------------------------------------------------------------
    - Error: Internal error: 'int' object is not callable

===========================================================================
/root/statemachine.py
In statemachine._exception_data docstring (line 1478):
---------------------------------------------------------------------------
    - Error: Internal error: 'int' object is not callable



--
Hong Yuan

?????????
???????????
http://www.homemaster.cn

From steve at holdenweb.com  Mon Feb 13 16:53:48 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Feb 2006 16:53:48 -0500
Subject: html source
In-Reply-To: <20060213194631.10759.qmail@web36512.mail.mud.yahoo.com>
References: <20060213194631.10759.qmail@web36512.mail.mud.yahoo.com>
Message-ID: <dsqv59$8fi$3@sea.gmane.org>

Steve Young wrote:
> Hi, I was wondering why when I use urllib2.build_opener().open(url), it 
> doesn't give me the same thing as if I would just click on view--> 
> source on my web browser. It gives me most of html on the page but 
> leaves out lots of scripts and some of the link's urls are truncated. Is 
> there something out there in python that gives me EXACTALLY the same 
> thing as if you were to just do view-->source on the web browser? Thanks 
> for the help.
> 
If this observation is truly correct it should qualify as a bug. Can you 
give us a URL and some code which demonstrate your assertion?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From fabioz at esss.com.br  Tue Feb 21 05:43:12 2006
From: fabioz at esss.com.br (Fabio Zadrozny)
Date: Tue, 21 Feb 2006 07:43:12 -0300
Subject: editor for Python on Linux
In-Reply-To: <43fa2376$0$1149$7a628cd7@news.club-internet.fr>
References: <dtai6e$23m$2@ariane.blic.net>	<chlhv15ktc4u3adv34sgk63tok5vl9j50q@4ax.com>	<43F8DA72.8040808@sympatico.ca>
	<43fa2376$0$1149$7a628cd7@news.club-internet.fr>
Message-ID: <43FAEEC0.6020402@esss.com.br>

Well... pydev has it: http://pydev.sf.net and pydev extensions goes much 
further: http://www.fabioz.com/pydev

Cheers,

Fabio

jean-michel bain-cornu wrote:

>>Boa-Constructor is an IDE rather than an editor.  Although it focuses
>>on wxPython, it has a good editor.
>>    
>>
>Yes, some possibilities are pretty good, like for instance the 
>findAll/findInFiles keeping the results in a new tab (I never saw this 
>elsewhere). Another useful is having the debugger launching the 
>application in a separate process, an excellent way to avoid bugs 
>pollution coming into the IDE.
>rgds
>jm
>  
>


-- 
Fabio Zadrozny
------------------------------------------------------
Software Developer

ESSS - Engineering Simulation and Scientific Software
www.esss.com.br

Pydev Extensions
http://www.fabioz.com/pydev

PyDev - Python Development Enviroment for Eclipse
http://pydev.sf.net
http://pydev.blogspot.com




From deets at nospam.web.de  Sat Feb 25 08:08:30 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 25 Feb 2006 14:08:30 +0100
Subject: Multiple threaded download streams?
In-Reply-To: <1200l41lq3dgu73@corp.supernews.com>
References: <1140867665.749334.210370@v46g2000cwv.googlegroups.com>
	<1200l41lq3dgu73@corp.supernews.com>
Message-ID: <46b36eFa9ocnU1@uni-berlin.de>

> Use a separate thread for downloading.

Or the twisted select-reactor. No threads needed.

Diez


From ivanf1 at comcast.net  Fri Feb  3 23:03:19 2006
From: ivanf1 at comcast.net (nitro)
Date: 3 Feb 2006 20:03:19 -0800
Subject: cannot install scipy
In-Reply-To: <UsVEf.7441$MF1.4622@fe08.lga>
References: <1139013871.122256.202130@g43g2000cwa.googlegroups.com>
	<UsVEf.7441$MF1.4622@fe08.lga>
Message-ID: <1139025799.128481.297310@g47g2000cwa.googlegroups.com>

LOL!

Thanks- ashamed :-)

nitro



From lycka at carmen.se  Wed Feb 22 04:23:14 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 22 Feb 2006 10:23:14 +0100
Subject: question about scope
In-Reply-To: <iZ1Jf.1632$No6.38223@news.tufts.edu>
References: <9J0Jf.1630$No6.38274@news.tufts.edu>
	<mailman.2012.1140105439.27775.python-list@python.org>
	<iZ1Jf.1632$No6.38223@news.tufts.edu>
Message-ID: <dthai2$b1h$1@wake.carmen.se>

John Salerno wrote:
> But as far as ifs and loops, is there such a thing as scope in them? 

No.

Local scopes are introduced with "def" or "class", nothing
else (or did I forget something?). There is nothing in Python
that corresponds directly to the { } in C and C++. If you want
data to exist in some "other scope", put them in a dictionary
(there you have your { } ;^) and use that explicitly.

Each Python module/file is a global scope in Python.

Something to consider if you come from C, is that variables
and assignments in Python are conceptually different from C.

Your objects/values are never created in a local scope. They
are always created on the heap, as if you would use malloc in
C or new in C++. All variables are pointers/references, and
the objects/values are automatically garbage collected. From
a C perspective, the only kind of variables you have are void
pointers, but that's ok, because you can only point these
pointers to managed objects that are handled by the runtime
systems. The runtime system handles both memory allocation
and deallocation and type checks for you. In some particular
cases (e.g. numeric types) it will also perform casting when
you need it.


From steve at holdenweb.com  Tue Feb  7 07:46:39 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 07 Feb 2006 07:46:39 -0500
Subject: Unable to get PIL to load jpeg images
In-Reply-To: <1139315319.654694.285330@g43g2000cwa.googlegroups.com>
References: <1139263113.552140.114100@o13g2000cwo.googlegroups.com>
	<1139315319.654694.285330@g43g2000cwa.googlegroups.com>
Message-ID: <dsa4rh$s9d$1@sea.gmane.org>

peter.mosley at talk21.com wrote:
> Someone out there must surely know - please!
> 
> Peter
> 
Try image-sig at python.org - or better still, subscribe to the image SIG 
mailing list (then you'll see replies ...)

I've never had any problems loading JPEG images. It's probably a setup 
issue.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From peter.maas at somewhere.com  Mon Feb 13 18:17:14 2006
From: peter.maas at somewhere.com (Peter Maas)
Date: Tue, 14 Feb 2006 00:17:14 +0100
Subject: how do you pronounce 'tuple'?
In-Reply-To: <nhv1v1lslk16i4u2v6ttrdpo0ju9d8h5qn@4ax.com>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
	<mailman.1857.1139863723.27775.python-list@python.org>
	<Wj6If.1606$No6.38150@news.tufts.edu> <dsqtq7$mju$1@online.de>
	<nhv1v1lslk16i4u2v6ttrdpo0ju9d8h5qn@4ax.com>
Message-ID: <dsr41u$1uo$1@online.de>

Dave Hansen schrieb:
>> Latin             n-tuple
>> ---------------------------
>> ...               ...
>> triplex           triple
>> duplex            duple
>> simplex           simple
> 
> When I was in 4th grade, I was taught to count to ten in latin: unos,
> duos, trace, quatro, quinque, sex, septem, octem, novem, decem

unus duo tres quattuor ... octo ...

But tuples mean threefold, twofold etc. and the Latin equivalents
are triplex duplex simples. That simple sounds weird may be due
to the fact that English speakeers perceive it as a native word
rather than a Latin import.

> Though I suspect "single" is correct.  Consider coronary bypass
> operations -- single, double, triple, quadruple...

That's OK but single stems from singularis (one-of-a-kind) rather
than from simplex (onefold) and doesn't fit as nicely to the other
tuples.

Peter Maas, Aachen


From varunhiremath at iitm.ac.in  Fri Feb 24 06:43:10 2006
From: varunhiremath at iitm.ac.in (Varun Hiremath)
Date: Fri, 24 Feb 2006 17:13:10 +0530
Subject: KPanelApplet using Python
Message-ID: <20060224114304.GA18999@localdomain>

Hi,
I was wondering if there is any way to make KDE PanelApplets using Python. I have made a small window using Qt, kdeui nad kdecore libs. Now I want to add it to the KDE kicker. Can I get any help regarding this matter.

Thank you.

-- 
-----------------------------------------------
Varun Hiremath
461, Jamuna Hostel
IIT Madras,
Chennai - 600 036
mob : +919840299732
-----------------------------------------------
My Webpage : http://www.ae.iitm.ac.in/~ae03b032
-----------------------------------------------


From onurb at xiludom.gro  Fri Feb  3 10:09:25 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Fri, 03 Feb 2006 16:09:25 +0100
Subject: Another try at Python's selfishness
In-Reply-To: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
Message-ID: <43e3723a$0$633$636a55ce@news.free.fr>

n.estner at gmx.de wrote:
> Having read previous discussions on python-dev I think I'm not the only
> Python programmer who doesn't particularly like python's "self"
> parameter:

bang ! You're dead !

(no no, just kidding !-)

> 
>     class Foo:

old-style classes are deprecated.

class Foo(object):

>         def bar(self, a,b):
>             return a+b


(snip)

> The point is, I _do_ think it's a good idea to explicitly write
> "self.SomeMember" for member-access,

With Python's lookup rules, it couldn't be otherwise anyway !-)

> so I thought: why can't we be
> equally explicit about member function declaration?

Because there's no such thing as a "member function" in Python.

> Wouldn't it be nice
> if I could write (say, in Python 3k, or maybe later):
> 
>     class Foo:
>         def self.bar(a,b):
>             return a+b
>     Foo().bar(1,2) => 3

'bar' is not an instance attribute, but a class attribute - it belongs
to *class* Foo, not to an instance of Foo.

BTW, 'self' does not yet exist (and cannot possibly exist) when this
code is eval'd (how could an instance of class Foo exists before class
Foo itself exists ?).

> That way, the declaration would match the invocation (at least
> syntactically), and the "magic"-feeling is gone. In the long run, the
> "old-style" syntax (i.e. if there's no '.' in the method name) could be
> used for static methods.

s/static/class/

> What do you think?

That you should learn more about the inners of Python's object model
(and specially at the Descriptor protocol).

class Foo(object):
  def __init__(self, a):
    self.a = a

def bar(obj, b):
 return obj.a + b

f = Foo(1)
bar(f, 2)

Foo.bar = bar
Foo.bar(f, 2)
f.bar(2)

The only 'magic' here is that when bar() is called *as an attribute of a
Foo instance*, the instance is passed as the first parameter. In fact,
this is much more explicit (well, IMHO) than the 'this' reference in
Java or C++.



-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From zhangchao19 at hotmail.com  Thu Feb 23 04:03:45 2006
From: zhangchao19 at hotmail.com (Ê÷Éϲä»Ò)
Date: Thu, 23 Feb 2006 17:03:45 +0800
Subject: 'rar' is not recognized as an internal or external command£¿£¿£¿£¿
Message-ID: <dtjv4r$ma1$1@news.cn99.com>


'rar' is not recognized as an internal or external command,
operable program or batch file.


import os
import time
source = [r'e:\temp\code',r'e:\temp\domains']
target_dir = r'e:\temp\bak'
target = target_dir+time.strftime('%Y%m%d%H%M%S')+'.rar'
rar_cmd = "rar a -idcdp %s %s" % (target,' '.join(source))
print rar_cmd
if os.system(r'cd D:\Program Files\WinRAR') == 0:
  if os.system(rar_cmd) == 0:
    print 'Successful backup to',target
  else:
    print 'Backup Failed!'
else:
  print 'FAILED!!!'

'rar' is not recognized as an internal or external command,
operable program or batch file.

rar a -idcdp e:\temp\bak20060222191139.rar e:\temp\code e:\temp\domains
Backup Failed!


but.........................

D:\>cd D:\Program Files\WinRAR

D:\Program Files\WinRAR>rar a -idcdp e:\temp\bak20060222191139.rar
e:\temp\code
e:\temp\domains

Creating archive e:\temp\bak20060222191139.rar

Adding    e:\temp\Code\Code\.classpath                                    OK
Adding    e:\temp\Code\Code\.project                                      OK
Adding    e:\temp\Code\Code\common\Code.class                             OK
Adding    e:\temp\Code\Code\common\Code.java                              OK
Adding    e:\temp\Code\Code\common                                        OK
Adding    e:\temp\Code\Code                                               OK
Adding    e:\temp\Code                                                    OK
Adding    e:\temp\domains\examples.jar                                    OK
Adding    e:\temp\domains\medrec.jar                                      OK
Adding    e:\temp\domains\wls.jar                                         OK
Adding    e:\temp\domains\wlw.jar                                         OK
Adding    e:\temp\domains                                                 OK

D:\Program Files\WinRAR>



why?




-- 
????????




From deets at nospam.web.de  Thu Feb  2 09:53:58 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 02 Feb 2006 15:53:58 +0100
Subject: my openGL API need threads!!! But how to ,ake it work???
References: <1138883972.001578.149350@g44g2000cwa.googlegroups.com>
	<1138889819.536105.57620@g47g2000cwa.googlegroups.com>
Message-ID: <44ekogF1oeqgU1@uni-berlin.de>

Laurent wrote:

> Hi,
> 
> here is the context:
> 
> I'm coding a openGL API I will need for a project for my school.
> This API is quite simple:
> 
> an ooglScene describe all needed to make an openGL, and inherits from a
> list. So an ooglScene is fundamentaly a list of ooglObjects (which is
> organised as a Composite Pattern).
> 
> ooglScene.run() do everthing needed to initialise GL and GLUT, and then
> launch the GLUT Main Loop.
> (the display function I wrote juste call the display method of each
> ooglObject in the ooglScene)
> 
> Here is the problem!
> 
> Once the GLUT Main Loop is launched, I cannot add other ooglObjects to
> my ooglScene, neither modify any existing ooglObject in my scene!

Do that in the registered event-functions. For example, keyboard(). After
all, the user must somehow trigger the need for inserting objects or
otherwise manipulating the scene. And that she does with either mouse or
keyboard. I bet there is a mouse-callback, too.

Diez


From fuzzyman at gmail.com  Fri Feb 17 11:50:01 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 17 Feb 2006 08:50:01 -0800
Subject: Evil, evil wxPython (and a glimmer of hope)
In-Reply-To: <1140189486.898380.245900@g14g2000cwa.googlegroups.com>
References: <1140116551.116322.12680@g43g2000cwa.googlegroups.com>
	<8764ned5ib.fsf@rose.polar.local>
	<1140162638.200378.199010@g44g2000cwa.googlegroups.com>
	<1140174946.948658.186160@g47g2000cwa.googlegroups.com>
	<1140180680.326797.69740@g43g2000cwa.googlegroups.com>
	<1140189486.898380.245900@g14g2000cwa.googlegroups.com>
Message-ID: <1140195001.515958.292420@g14g2000cwa.googlegroups.com>


vivainio at gmail.com wrote:
> vivainio at gmail.com wrote:
> > Fuzzyman wrote:
> >
> > > The code is relatively simple - so it would be easy to maintain the
> > > parts you use if that was necessary. Certainly easier than duplicating
> > > it yourself from scratch. :-)
> >
> > Sounds convincing, I'll give it a shot after all.
>
> Ok, after brief eyeballing & experimenting, it appears that Wax is just
> what I was looking for. The code is simple, concise and trivially
> understandable, the level of wrapping seems about right, and examples
> are helpful.
>
> I'm glad I came whining about this in c.l.py instead of sucking it up
> or switching toolkits altogether. :-)

That's good news. I'm about to start using Wax on a couple of
small(ish) projects - so it's nice to know about other users.

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml



From aleaxit at yahoo.com  Fri Feb  3 10:29:40 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Fri, 3 Feb 2006 07:29:40 -0800
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<drvd56$nb3$1@wake.carmen.se>
Message-ID: <1ha69re.1u457so1rglutmN%aleaxit@yahoo.com>

Magnus Lycka <lycka at carmen.se> wrote:
   ...
> which isn't needed at all. So far, the existence of x.y somewhere
> in Python always implied that x was already introduced explicitly
> in the program, and you suggest that we violate that both in the

Almost... import (and from) statements are exceptions to this.

import x.y

binds or rebinds name x "on the fly", as well as attribute y of x.


Alex


From iddw at hotmail.com  Mon Feb 13 17:51:39 2006
From: iddw at hotmail.com (Dave Hansen)
Date: Mon, 13 Feb 2006 16:51:39 -0600
Subject: how do you pronounce 'tuple'?
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>	<mailman.1806.1139805039.27775.python-list@python.org>
	<0mt1v15ei7tg1mr0oclo703b6c92jr9vb4@4ax.com>
	<mailman.1865.1139867215.27775.python-list@python.org>
Message-ID: <9g12v1lo2enhh6g7b8p5kgidjksdikug9h@4ax.com>

On Mon, 13 Feb 2006 16:46:26 -0500 in comp.lang.python, Steve Holden
<steve at holdenweb.com> wrote:

>Dave Hansen wrote:
>> On Sun, 12 Feb 2006 23:30:25 -0500 in comp.lang.python, Steve Holden
>> <steve at holdenweb.com> wrote:
[...]
>> 
>>>"Tyoople", "toople" or "tupple" depending on who you are, where you grew 
>>>up and who you are speaking to. As with so many Usenet questions, 
>>>there's no right answer, only 314 wrong ones :-)
>> 
>> 
>> FWIW, I've often heard the latter two, but never the first one.
>> "Tuple" by itself tends to be "toople," but as a suffix tends to be
>> "tupple."
>> 
>No, but then you probably listen to the noos, not the nyoos, on the TV 
>or radio. That's a particularly British pronunciation.

I have heard that pronunciation of "news," and not just from the
British.  Back in the mid-1980's I listened to a radio station with a
DJ who, in an attempt at humor, would prefix his news segments with a
nasal "And now, the nYoos!" with the first part of the Y heavily
stressed and about an octave higher in pitch than either end of the
word.  He wasn't trying to sound British, just mock-enthusiastic.

[...]
>> On NPR ([American] National Public Radio), there's a weekly music
>> program called "American Routes" pronounced such to conjure the
>> alternate "American Roots."
>> 
>Never caught that. Must go get some batteries for my radio.

If you're interested, see http://www.americanroutes.org/

Their station list includes some who broadcast over the web.

Regards,
                                        -=Dave

-- 
Change is inevitable, progress is not.


From hotcountrywench at comcast.net  Wed Feb  1 23:03:55 2006
From: hotcountrywench at comcast.net (hotcountrywench)
Date: Wed, 1 Feb 2006 22:03:55 -0600
Subject: No subject
Message-ID: <001d01c627ad$afc5a930$6692a543@yourrtmejesvbc>

I just got a new computer and pyton 2.2 is on it and I have never heard of it What is is for. Should I keep it on my puter???????????????
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From peter at engcorp.com  Sat Feb 25 09:07:48 2006
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 25 Feb 2006 09:07:48 -0500
Subject: Import in a separate thread
In-Reply-To: <7xirr3shg0.fsf@ruckus.brouhaha.com>
References: <1140869286.548125.17710@p10g2000cwp.googlegroups.com>	<mailman.2426.1140871920.27775.python-list@python.org>
	<7xirr3shg0.fsf@ruckus.brouhaha.com>
Message-ID: <dtpobi$qmv$1@sea.gmane.org>

Paul Rubin wrote:
> Peter Hansen <peter at engcorp.com> writes:
>>Sounds like premature optimization.  Speed "things" up?  What things?
>>How long is it taking now to load the modules you are loading?  Even
>>the wxPython demo takes only a few seconds to load on a decent
>>machine, and that's loading a *heck* of a lot of stuff.  
> 
> I know that whenever I start IDLE and it's not already cached, it
> takes a significant amount of time, and that doesn't even use
> wxPython.

I don't dispute that there are in the world programs that take too long 
to start by even objective measures.  I don't dispute that you, Paul, 
might consider IDLE to take too long to start.  I don't think I was 
responding to you, however, but to the OP, who hasn't described anything 
about his situation except that he believes importing modules in a 
separate thread might "speed things up".  To me, that sounded like the 
words of someone who not only might not be aware of the excellent advice 
regarding premature optimization, but who might also not suffer from a 
significant startup delay but who simply imagined that perhaps using a 
"trick" to import things differently might make something run faster. 
Understanding why he wants to do this is important to knowing what the 
best approach is, whether it's to say "don't do it" or to point to 
alternatives (such as a splash screen) which others have found to solve 
the problem.

Just because it appears some people prematurely cry "premature 
optimization" doesn't mean that it's an invalid thing to ask a poster to 
consider.

-Peter



From invalidemail at aerojockey.com  Tue Feb 28 06:14:25 2006
From: invalidemail at aerojockey.com (Carl Banks)
Date: 28 Feb 2006 03:14:25 -0800
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<1141109451.570616.86140@p10g2000cwp.googlegroups.com>
	<mailman.2505.1141118380.27775.python-list@python.org>
Message-ID: <1141125265.118619.36500@i40g2000cwc.googlegroups.com>

Stefan Rank wrote:
> on 28.02.2006 07:50 Carl Banks said the following:
> > Ben Finney wrote:
> >> This PEP specifies an enumeration data type for Python.
> >
> [snip]
> >
> > Here's why I think it's not too useful to begin with: the benefits of
> > the enum you describe here are pretty weak.
>
> I need to disagree heavily here :)

"the benefits of the enum you describe here [beyond my example which I
claimed enum was only a minor improvement over] are pretty weak."


> > It's a pretty weak case to have a dedicated builtin to prevent
> > duplicates in something that changes maybe once a month, as enums tend
> > to change rather slowly.  (At least, that's the way enums in other
> > languages are used, and the design you present here seems to suggest
> > you intend to use them that way as well.)  And frankly, a unit test or
> > assertion could check this.
> [snip]
>
> I don't understand what you mean by 'change rather slowly'?

Construct data structure on-the-fly from an XML file edited by multiple
people every day  = changes rather quickly

Construct data structure from a Python file that was last edited a year
and a half ago = changes rather slowly

Typically, enums fall into the latter category.  You set the enum
values, and then pretty much leave them alone, adding new values only
occasionally.  (Come on, how often do the days of the week change?)
All I was saying is, changes to the enum values are infrequent enough
that having a special type just to make sure there are no duplicates is
a waste.  The only justification for a built-in enum is the other stuff
you mentioned.


> One thing that is probably missing to allow this, is a enum-set-creation
> with the | operator::
>
>    Weekdays = enum('mon', 'tue', 'wed', 'thu', 'fri', 'sat', 'sun')
>    daysihate = Weekdays.mon | Weekdays.thu
>
> (and this discussion needs to move to python-dev ?)

What's wrong with set((Weekdays.mon,Weekdays.thu))?  Explicit is better
than implicit.


> As for the metaclass versions: For myself, the above version feels more
> natural and straightforward (in the same way as the PEP author describes
> it), though I understand the subclassing ideas.
>
> But are there use cases for subclassing, that aren't better served with
> a new enum or something homegrown?
> Can C++/Pascal/Java enums be subclassed?

In C++, enum is a type but not a class.  Same thing with Ada.  Java
didn't have enums last time I checked.  Don't know about Pascal.  I
didn't care too much about subclassing; I just thought different enum
constant that couldn't (or, rather, oughtn't) be compared probably
should be instances of a separate class.  It doesn't matter much,
though.

Should something like this work:

day = Weekdays.mon
isinstance(day,Weekdays)

?


Carl Banks



From codecraig at gmail.com  Fri Feb 10 09:20:43 2006
From: codecraig at gmail.com (py)
Date: 10 Feb 2006 06:20:43 -0800
Subject: Create dict from two lists
In-Reply-To: <dsi70h$48e$1@aphrodite.grec.isp.9tel.net>
References: <1139579518.129742.265680@o13g2000cwo.googlegroups.com>
	<453k9eF444frU1@uni-berlin.de>
	<dsi70h$48e$1@aphrodite.grec.isp.9tel.net>
Message-ID: <1139581243.360298.164070@g43g2000cwa.googlegroups.com>

Thanks, itertools.izip and just zip work great.  However, I should have
mentioned this, is that I need to keep the new dictionary sorted.

d = {1:'first', -5 : 'negative 5', 6:'six', 99:'ninety-nine',
3:'three'}
keys = d.keys()
keys.sort()
vals = map(d.get, keys)

At this point keys is sorted [-5, 1, 3, 6, 99] and vals is sorted
['negative 5', 'first', 'three', 'six', 'ninety-nine']

Using zip does not create the dictionary sorted in this order.
new_d = dict(zip(keys, vals))

How can I use the two lists, keys and vals to create a dictionary such
that the items keep their order?

Thanks.



From kent at kentsjohnson.com  Sun Feb 26 16:06:48 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Sun, 26 Feb 2006 16:06:48 -0500
Subject: How can I find the remainder when dividing 2 integers
In-Reply-To: <46ehr1FarmcsU1@uni-berlin.de>
References: <1140984473.723258.70050@e56g2000cwe.googlegroups.com>
	<46egiuFanujjU2@uni-berlin.de>
	<1140985687.324979.153730@e56g2000cwe.googlegroups.com>
	<46ehr1FarmcsU1@uni-berlin.de>
Message-ID: <440213d1_1@newspeer2.tds.net>

Diez B. Roggisch wrote:
> silverburgh.meryl at gmail.com schrieb:
> 
>> okay, I try you suggestion, and re-write my code like this:
>> colors = ["#ff0000", "#00FF00", "#0000FF"]
>> colorIndex = 0
>>
>> def getText(nodelist):
>>
>>
>>              for str in strings:
>>
>>                      print colors[colorIndex  % colors.length]
>>                      colorIndex += 1
>>
>> but i get this error:
>>    print colors[colorIndex  % colors.length]
>> UnboundLocalError: local variable 'colorIndex' referenced before
>> assignment
> 
> 
> If I take your code, it works for me.

Probably because it never calls getText().

The problem is that colorIndex is being assigned inside getText(). This 
makes Python assume it is a local variable and it won't see the global 
colorIndex. The UnboundLocalError is telling you that there is no value 
(binding) for the local variable colorIndex.

One solution is to move colorIndex into getText() and initialize it 
every time:

def getText(nodelist):
              colorIndex = 0
              for str in strings:
                      print colors[colorIndex  % colors.length]
                      colorIndex += 1

If you want the value of colorIndex to persist so one call to getText() 
picks up where the last one left off, put a global statement inside 
getText() so Python knows colorIndex is global:

def getText(nodelist):
              global colorIndex
              for str in strings:
                      print colors[colorIndex  % colors.length]
                      colorIndex += 1

Kent


From chasonh at hotmail.com  Wed Feb  8 18:53:41 2006
From: chasonh at hotmail.com (Chason Hayes)
Date: Wed, 08 Feb 2006 23:53:41 GMT
Subject: Literal Escaped Octets
References: <pan.2006.02.06.04.50.15.325558@hotmail.com>
	<mailman.1495.1139233969.27775.python-list@python.org>
	<pan.2006.02.06.16.57.13.359336@hotmail.com>
	<mailman.1532.1139277512.27775.python-list@python.org>
	<pan.2006.02.08.02.34.06.750887@hotmail.com>
	<mailman.1590.1139378286.27775.python-list@python.org>
Message-ID: <pan.2006.02.09.00.03.42.306469@hotmail.com>

On Wed, 08 Feb 2006 00:57:45 -0500, Steve Holden wrote:

> Chason Hayes wrote:
>> On Tue, 07 Feb 2006 01:58:00 +0000, Steve Holden wrote:
>> 
>> 
>>>Chason Hayes wrote:
>>>
>>>>On Mon, 06 Feb 2006 13:39:17 +0000, Steve Holden wrote:
>>>
>>>[...]
>>>
>>>>>The URL you reference is discussing how you represent arbitrary values 
>>>>>in string literals. If you already have the data in a Python string the 
>>>>>best advise is to use a parameterized query - that way your Python DB 
>>>>>API module will do the escaping for you!
>>>>>
>>>>>regards
>>>>> Steve
>>>>
>>>>
>>>>Thanks for the input. I tried that with a format string and a
>>>>dictionary, but I still received a database error indicating illegal
>>>>string values. This error went away completely when I used a test file
>>>>consisting only of text, but reproduced everytime with a true binary file.
>>>>If you can let me know where I am wrong or show me a code snippet with a
>>>>sql insert that contains a variable with raw binary data that works,
>>>>I would greatly appreciate it.
>>>>
>>>
>>>I tried and my experience was exactly the same, which made me think less 
>>>of PostgreSQL.
>>>
>>>They don't seem to implement the SQL BLOB type properly, so it looks as 
>>>though that rebarbative syntax with all the backslashes is necessary. Sorry.
>>>
>>>regards
>>>  Steve
>> 
>> 
>> with regards to escaping data parameters I have found that I have to
>> specifically add quotes to my strings for them to be understood by
>> pstgresql. For example
>> 
>> ifs=open("binarydatafile","r")
>> binarydata=ifs.read()
>> stringdata=base64.encodestring(binarydata)
>> 
>> #does not work
>> cursor.execute("insert into binarytable values(%s)" % stringdata)
>> 
>> #need to do this first
>> newstringdata = "'" + stringdata + "'"
>> 
>> then the select statment works.
>> Is this expected behavior? Is there a better way of doing this?
>> 
>> thanks for any insight
> 
> Yes, parameterize your queries. I assume you are using psycopg or 
> something similar to create the database connection (i.e. I something 
> that expects the "%s" parameter style - there are other options, but we 
> needn't discuss them here).
> 
> The magic incantation you seek is:
> 
> cursor.execute("insert into binarytable values(%s)", (stringdata, ))
> 
> Note that here there are TWO arguments to the .execute() method. The 
> first is a parameterized SQL statement, and the second is a tuple of 
> data items, one for each parameter mark in the SQL.
> 
> Using this technique all necessary quoting (and even data conversion 
> with a good database module) is performed inside the database driver, 
> meaning  (among other things) that your program is no longer vulnerable 
> to the dreaded SQL injection errors.
> 
> This is the technique I was hoping would work with the bytea datatype, 
> but alas it doesn't. ISTM that PostgreSQL needs a bit of work there, 
> even though it is otherwise a very polished product.
> 
> regards
>   Steve

That was it. Thanks for your great help.

Chason



From roy at panix.com  Mon Feb 27 21:12:51 2006
From: roy at panix.com (Roy Smith)
Date: Mon, 27 Feb 2006 21:12:51 -0500
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<mailman.2474.1141050152.27775.python-list@python.org>
	<877j7gxonk.fsf@rose.polar.local>
Message-ID: <roy-71481E.21125127022006@reader2.panix.com>

A few random questions:

a = enum ('foo', 'bar', 'baz')
b = enum ('foo', 'bar', 'baz')

what's the value of the following:

a == b
a is b
a.foo == b.foo
a.foo is b.foo
len (a)
str (a)
repr (a)
hash (a)
type (a)

Can you make an enum from a sequence?

syllables = ['foo', 'bar', 'baz']
c = enum (syllables)

You imply that it works from "An enumerated type is created from a sequence 
of arguments to the type's constructor", but I suspect that's not what you 
intended.

BTW, I think this is a great proposal; enums are a badly needed part of the 
language.  There's been a number of threads recently where people called 
regex methods with flags (i.e. re.I) when integers were expected, with 
bizarre results.  Making the flags into an enum would solve the problem 
while retaining backwards compatibility.  You would just have to put in the 
re module something like:

flags = enum ('I', 'L', 'M', 'S', 'U', 'X')
I = flags.I
L = flags.L
M = flags.M
S = flags.S
U = flags.U
X = flags.X

then the methods which expect a flag can do:

if flag is not in re.flags:
   raise ValueError ("not a valid flag")

and the ones which expect an integer would (if nothing better), raise 
NotImplemented when they tried to use the value as an integer if you passed 
it a flag by mistake.


From johnjsal at NOSPAMgmail.com  Thu Feb 16 10:31:44 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 16 Feb 2006 15:31:44 GMT
Subject: question about scope
In-Reply-To: <9J0Jf.1630$No6.38274@news.tufts.edu>
References: <9J0Jf.1630$No6.38274@news.tufts.edu>
Message-ID: <AV0Jf.1631$No6.38357@news.tufts.edu>

John Salerno wrote:

> I understand what global and built-in are, and I thought I understood 
> the concept of local too, but when I got to this sentence (and the 
> previous sentence), I became confused about the first two scopes. What's 
> the difference between 'local' and 'enclosing functions'?

I guess maybe I jumped the gun. Here's some stuff later in the chapter 
that I think explains it for me:

----------
Note that the second 'E' scope lookup layer -- enclosing defs or lambdas 
-- technically can correspond to more than one lookup layer. It only 
comes into play when you nest functions within functions.*

* The scope lookup rule was known as the "LGB" rule in the first edition 
of this book. The enclosing def layer was added later in Python, to 
obviate the task of passing in enclosing scope names explicitly -- 
something usually of marginal interest to Python beginners.
----------


From frithiof.jensen at die_spammer_die.ericsson.com  Thu Feb  9 04:35:37 2006
From: frithiof.jensen at die_spammer_die.ericsson.com (Frithiof Andreas Jensen)
Date: Thu, 9 Feb 2006 10:35:37 +0100
Subject: OT: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<dscq68$ejc$1@news.al.sw.ericsson.se>
	<CdadnavYLe_sbHTeRVn-ow@comcast.com>
Message-ID: <dsf2da$lmr$1@news.al.sw.ericsson.se>


"DH" <no at spam.com> wrote in message
news:CdadnavYLe_sbHTeRVn-ow at comcast.com...
> Frithiof Andreas Jensen wrote:
> > <n.estner at gmx.de> wrote in message
> > news:1138918102.863033.298700 at o13g2000cwo.googlegroups.com...
> >> Having read previous discussions on python-dev I think I'm not the only
> >> Python programmer who doesn't particularly like python's "self"
> >> parameter:
> >
> > Ok, there might be five programmers and one imam. The imam does not like
> > anything more recent than 700 A.D ...
> >
>
>
> You Danes and your Muslim jokes :)

;-)

A culture thing, that: They are now accepted as part of society, so we treat
them equally to the people from ?rhus, Copenhagen, West-Jutland,
Sout-Jutland, Bornholm and Mols (a tiny area 30 km from ?rhus). If we did
not care for them, we would not poke fun at them occasionally.

So far, I think the "integration" has really improved a lot because this
affair has clearly shown that the Danish muslims are pretty much like
everyone else here. The ethnic kiosks still sell Jyllands Posten, the Danish
still buy groceries in ethnic shops e.t.c. Like Normal. No riots, looting
and threats from hooded cowards and bullies.


What we instead have learned are that the Imams  - some of which have been
given asylum - are blatantly lying and falsifying evidence in order to
slander the country that pay their social security when the very first
opportunity arises. Maybe those people should not be here in the first
place.

We have also learned that there is no point in getting involved in dialogue,
export grants (i.e. bribes) and foreign aid money (more bribes) with
dictatorships and defunct states. The effort should be directed elsewhere,
where it is actually any use.

Finally we can take comfort in knowing that the "lunatic segment" in the
population is clearly less than 1500 out of 5,000,000 people - although the
loonies do get 80% of the media coverage (like f.ex. the 300 "autonomen"
that just *had* to be the only violent segment in a media-hyped
"confrontational" demo with 30(!) neo-nazis, 200 muslims and about half the
Danish police force present in riot gear - Great Plan Einstein; ). The
TeeVee news should be relabeled "Fools Hour" - their mantra seems to be that
"if you want the opinion of any large group, go seek out the village idiot
and ask him".

The conclusion is that the *real* threat to democracy does *not* come from
the lunatic segment but from connected people with nice suits and vested
interests such as the Danish Industri Association that are clearly willing
to take in a used Sharia as part of a trade. They worked for Hitler too and
has clearly learned nothing!!


PS:

If one was trying to detect fanatics of any creed, a certain indicator would
be that they have absolutely no sense of humour - they suffer from a
yet-to-be-described variant of autism I.M.O.




From nun at example.com  Sat Feb 11 06:35:41 2006
From: nun at example.com (Mitja Trampus)
Date: Sat, 11 Feb 2006 12:35:41 +0100
Subject: Shortest prime number program
In-Reply-To: <1139652226.869102.310180@g14g2000cwa.googlegroups.com>
References: <1139652226.869102.310180@g14g2000cwa.googlegroups.com>
Message-ID: <i_jHf.32$oj5.9305@news.siol.net>

swisscheese wrote:
> I figured someone out there must have written a minimal code size prime
> number generator. I did not find one after a bit of searching around.
> For primes up to 100 the best I could do was 70 characters (including
> spaces):
> 
> r=range(2,99)
> m=[x*y for x in r for y in r]
> [x for x in r if not x in m]

A more straightforward and somewhat shorter solution:

r=range(2,99)
[x for x in r if [x%d for d in r].count(0)<2]

I'm sure it can be made shorter still.


From bignose+hates-spam at benfinney.id.au  Mon Feb 27 19:42:23 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 28 Feb 2006 11:42:23 +1100
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<1141019214.153904.115220@j33g2000cwa.googlegroups.com>
	<zIwMf.9924$PR2.201420@twister2.libero.it>
Message-ID: <877j7gz53k.fsf@rose.polar.local>

"Giovanni Bajo" <noway at sorry.com> writes:
> Kay Schluehr wrote:
>> Ben Finney wrote:
>>> One motivation for having a class (rather than an instance) for
>>> each enumeration is to allow subclasses of enumerations, extending
>>> and altering an existing enumeration.  A class, though, implies
>>> that instances of that class will be created; it is difficult to
>>> imagine what it means to have separate instances of a "days of the
>>> week" class, where each instance contains all days.  This usually
>>> leads to having each class follow the Singleton pattern, further
>>> complicating the design.
>>
>> Maybe a metaclass implementation complicates design, but usage is
>> quite simple and flexible. The classics is already referenced by
>> the Python docs:
>>
>> http://www.python.org/doc/essays/metaclasses/Enum.py
>
> Agreed. Allowing subclassing of an existing enum is a strong plus to me.

Having classes as enumerations seems to me to complicate the
conceptual model. As I see it, an enumeration is a container
object. For a container object to be subclassed has no obvious
semantic meaning.

If an enumeration object were to be derived from, I would think it
just as likely to want to have *fewer* values in the derived
enumeration. Subclassing would not appear to offer a simple way to do
that.

To preserve the promise that every enumeration's values are unique,
even the values that were inherited would need to be different in each
enumeration. This, again, doesn't fit well with the concept of
subclassing.

I can see value in wanting to derive a new enumeration from an
existing one; I just don't think subclassing makes sense for that
operation.

How would you specify the interface for deriving one enumeration from
another?

-- 
 \        "Good judgement comes from experience. Experience comes from |
  `\                           bad judgement."  -- Frederick P. Brooks |
_o__)                                                                  |
Ben Finney


From steve at REMOVETHIScyber.com.au  Tue Feb 14 06:36:29 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Tue, 14 Feb 2006 22:36:29 +1100
Subject: Unexpected behaviour of getattr(obj, __dict__)
Message-ID: <pan.2006.02.14.11.36.28.723688@REMOVETHIScyber.com.au>

I came across this unexpected behaviour of getattr for new style classes.
Example:

>>> class Parrot(object):
...     thing = [1,2,3]
...
>>> getattr(Parrot, "thing") is Parrot.thing
True
>>> getattr(Parrot, "__dict__") is Parrot.__dict__
False

I would have expected that the object returned by getattr would be the
same object as the object returned by standard attribute access. This is
true for some attributes, but not for __dict__. I don't know if there are
other examples.

Why is this? Is there some documentation I can read up about this? I've
tried searching, but can't find anything useful.



-- 
Steven.



From amk at amk.ca  Mon Feb 13 11:29:39 2006
From: amk at amk.ca (A.M. Kuchling)
Date: Mon, 13 Feb 2006 10:29:39 -0600
Subject: Rethinking the Python tutorial
References: <dsfqv4$shc$1@wake.carmen.se>
	<mailman.1721.1139586567.27775.python-list@python.org>
	<dsq3ta$bne$1@wake.carmen.se>
	<mailman.1836.1139846681.27775.python-list@python.org>
Message-ID: <ormdnWevlMJuLm3eRVn-tg@speakeasy.net>

On Mon, 13 Feb 2006 11:03:55 -0500, 
	Steve Holden <steve at holdenweb.com> wrote:
> What we are talking about here is a Python Language Users' Guide.

I actually started on such a document over the holidays, but have only
described about 3 or 4 statements at this point.  However, it's
probably not going to be *much* smaller than the Reference Guide,
because pretty much every topic in the RefGuide needs to appear in the
user's guide.

--amk



From sybrenUSE at YOURthirdtower.com.imagination  Fri Feb 17 19:29:36 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Sat, 18 Feb 2006 01:29:36 +0100
Subject: xml.dom.ext documentation
References: <1140214077.343893.288600@g44g2000cwa.googlegroups.com>
Message-ID: <slrndvcqjh.91h.sybrenUSE@schuimige.unrealtower.org>

hortitude.eyeball at gmail.com enlightened us with:
> I figure I must just be missing something, but I can't seem to find
> good documentation for xml.dom.ext.  What I'm hoping for is just a
> simple list of what actually is available in that package (what
> other packages get included if you import xml.dom.ext and what
> functions are available).

'pydoc xml.dom.ext' works fine for me.

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From benji at benjiyork.com  Thu Feb 23 14:55:07 2006
From: benji at benjiyork.com (Benji York)
Date: Thu, 23 Feb 2006 14:55:07 -0500
Subject: why don't many test frameworks support file-output?
In-Reply-To: <BAY108-F125E8738194B5113DC85C0CDF20@phx.gbl>
References: <BAY108-F125E8738194B5113DC85C0CDF20@phx.gbl>
Message-ID: <43FE131B.2020401@benjiyork.com>

kanchy kang wrote:
> i browsed the following frameworks briefly: nose, OOBTest,
> testosterone,  py.test, Sancho ... and found out they do support 
> imediate screen-output only.

You can redirect stdout to a file.
--
Benji York


From frithiof.jensen at die_spammer_die.ericsson.com  Wed Feb  8 08:03:04 2006
From: frithiof.jensen at die_spammer_die.ericsson.com (Frithiof Andreas Jensen)
Date: Wed, 8 Feb 2006 14:03:04 +0100
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
Message-ID: <dscq68$ejc$1@news.al.sw.ericsson.se>


<n.estner at gmx.de> wrote in message
news:1138918102.863033.298700 at o13g2000cwo.googlegroups.com...
> Having read previous discussions on python-dev I think I'm not the only
> Python programmer who doesn't particularly like python's "self"
> parameter:

Ok, there might be five programmers and one imam. The imam does not like
anything more recent than 700 A.D ...

> What do you think?
>

Troll!




From claudio.grondi at freenet.de  Sun Feb 26 14:50:38 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Sun, 26 Feb 2006 20:50:38 +0100
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <*firstname*nlsnews-46208F.13454626022006@news.verizon.net>
References: <dtl9ad$35h$1@sea.gmane.org> <dtlat7$80c$1@sea.gmane.org>
	<mailman.2376.1140733288.27775.python-list@python.org>
	<dtljre$f8i$1@newsreader3.netcologne.de>
	<dtn5l2$nhr$1@newsreader3.netcologne.de>
	<dtqpkl$kbo$1@newsreader3.netcologne.de>
	<*firstname*nlsnews-46208F.13454626022006@news.verizon.net>
Message-ID: <dtt0qf$ete$1@newsreader3.netcologne.de>

Tony Nelson wrote:
> In article <dtqpkl$kbo$1 at newsreader3.netcologne.de>,
>  Claudio Grondi <claudio.grondi at freenet.de> wrote:
> 
> 
>>Claudio Grondi wrote:
>>
>>>Claudio Grondi wrote:
>>>
>>>
>>>>Paul Probert wrote:
>>>>
>>>>
>>>>>Peter Hansen wrote:
>>>>>
>>>>>
>>>>>>Are you saying that you believe the time.sleep(1) call is actually 
>>>>>>blocking for 200 seconds?
>>>>
>>>>With such rare occurrence it is very hard to tell what is going on. 
>>>>Usually I put such strange things on a list of curiosities I don't 
>>>>want to know the reason of, because it is in my eyes not worth the 
>>>>effort. Maybe it is even a common problem not yet detected by me, 
>>>>because I have never run this kind of tests for such a long time.
>>>>Starting today, I can tell you statistically not earlier than in one 
>>>>week, if I have the same problem on my machines (currently I am 
>>>>running only one or two at the same time).
>>>
>>>
>>>Here the intermediate results on my Windows XP machine connected to the 
>>>Internet via very fast digital phone line connection (network 
>>>card/digital-converter box/phone-line):
>>>
>>>dt= 1.125          time= 2006_02_24_11h_36m_15s
>>>dt= 9.20200014114  time= 2006_02_24_12h_46m_49s
>>>dt= 1.18799996376  time= 2006_02_24_14h_43m_32s
>>>
>>>The code used:
>>>"""
>>>import time
>>>while True:
>>>  oldtime=time.time()
>>>  time.sleep(1.0)
>>>  newtime=time.time()
>>>  dt=newtime-oldtime
>>>  if dt > 1.1:
>>>    print 'dt=',dt,' time=',time.strftime('%Y_%m_%d_%Hh_%Mm_%Ss')
>>>"""
>>>running in a command line console parallel to usual daily business on 
>>>the computer.
>>>
>>>The yesterday night run (5 hours) gave max. 1.125 sec., so I am 
>>>surprized to see the 9 seconds already after only two hours today.
>>>
>>>Claudio
>>
>>The 9.2 seconds difference was also because of time synchronization 
>>Windows XP does using time.windows.com server - it reported to be done 
>>last time 2006-02-24 at 12:46 o'clock i.e. exactly at the same time 
>>where the 9.2 delay occurred.
> 
> 
> ISTM that using time-of-day is the wrong thing for measuring elapsed 
> time, but I don't find anything in the time module that would be better.  
> /proc/uptime looks like it would work on linux, in a roundabout way:
> 
>     >>> up = open('/proc/uptime')
>     >>> up.seek(0) ; up.read()
> 
> will print uptime and idle time, but on linux only.  At least it seems 
> to be fast enough for the purpose at hand (about 18 microseconds on my 
> old box, according to timeit).
> 
> Is there a better timer available in python?  I see that timeit module 
> uses time.time() (or time.clock() on MSWindows), so I am not hopeful.

I mean, that using time.clock() solves the problem, because the output 
of the following code:

"""
import time
while True:
   old_Time = time.time()
   oldClock = time.clock()
   time.sleep(1.0)
   new_Time = time.time()
   newClock = time.clock()
   dt=new_Time-old_Time
   if(  dt < 0.9 or dt > 1.1 ):
     print 'new_Time-old_Time =', dt,' 
time=',time.strftime('%Y_%m_%d_%Hh_%Mm_%Ss')
     print 'newClock-oldClock =', newClock-oldClock
"""

was:

new_Time-old_Time = 177.921999931  time= 2006_02_26_20h_46m_01s
newClock-oldClock = 0.999994692063
new_Time-old_Time = -124.171999931  time= 2006_02_26_20h_44m_19s
newClock-oldClock = 1.00000502857
new_Time-old_Time = 53.3339998722  time= 2006_02_26_20h_45m_42s
newClock-oldClock = 1.00001313016
new_Time-old_Time = 0.634000062943  time= 2006_02_26_20h_45m_48s
newClock-oldClock = 1.00000195556

where I have manipulated the system clock manually to trigger the output.

Claudio


From tdelaney at avaya.com  Mon Feb 20 22:43:50 2006
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Tue, 21 Feb 2006 14:43:50 +1100
Subject: Python vs. Lisp -- please explain
Message-ID: <2773CAC687FD5F4689F526998C7E4E5F07434F@au3010avexu1.global.avaya.com>

Donn Cave wrote:

> for very long.  If you give me a Python program, you have 3 choices: 
> cross your fingers and hope that I have the required Python
> interpreter version, slip in a 25Mb Python interpreter install and
> hope I won't notice, or come clean and tell me that your program
> needs an interpreter and I should check to see that I have it.

Or use the correct term - a Python Virtual Machine.

The the compiler is built into the VM as opposed to a separate tool
(like Java) is just an implementation issue. There's nothing stopping
you from compiling Python source offline and just distributing the
bytecode (and this is commonly done) - although in that case you are
usually tied to a specific PVM major version.

Tim Delaney


From Allerdyce.John at gmail.com  Sun Feb 26 14:01:45 2006
From: Allerdyce.John at gmail.com (Allerdyce.John at gmail.com)
Date: 26 Feb 2006 11:01:45 -0800
Subject: How to use python regular expression to substitute string value
In-Reply-To: <87lkvy7xxi.fsf@a11a.mannikko1.ton.tut.fi>
References: <1140978932.892295.322370@z34g2000cwc.googlegroups.com>
	<87lkvy7xxi.fsf@a11a.mannikko1.ton.tut.fi>
Message-ID: <1140980505.788589.204820@i40g2000cwc.googlegroups.com>

Thanks. But i don't understand why I need to do this:
x. . area = map (lambda x: int(x), re.findall (pattern, line)[0]

if i have the value already by doing this:
 x, y, width, height, area = re.findall(pattern, line)[0]
print "rect x=\"%(x)s\" y=\"%(y)s\" width=\"%(width)s\"
height=\"%(height)s\" ..." % locals()



From g.brandl-nospam at gmx.net  Thu Feb 16 16:08:38 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Thu, 16 Feb 2006 22:08:38 +0100
Subject: define loop statement?
In-Reply-To: <lW4Jf.31559$3V4.8390@trnddc06>
References: <lW4Jf.31559$3V4.8390@trnddc06>
Message-ID: <45k7umF76o79U1@individual.net>

David Isaac wrote:
> I would like to be able to define a loop statement
> (nevermind why) so that I can write something like
> 
> loop 10:
>     do_something
> 
> instead of
> 
> for i in range(10):
>     do_something
> 
> Possible?  If so, how?

It's not possible to create a new statement, with suite
and indentation rules without hacking the interpreter or
resorting to alternative bytecode compilers such as "pyc".

Creating a _function_ named "loop" is easy as Jonathan's
answer shows.

Georg


From hinnc at yahoo.com  Fri Feb 10 09:40:15 2006
From: hinnc at yahoo.com (slogging_away)
Date: 10 Feb 2006 06:40:15 -0800
Subject: Too Many if Statements?
In-Reply-To: <43ec87cc$0$7212$626a54ce@news.free.fr>
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<6e2iu1hdb8fvlfkcuulloiiq1khlbhret1@4ax.com>
	<1139517959.741090.28560@g14g2000cwa.googlegroups.com>
	<43ec87cc$0$7212$626a54ce@news.free.fr>
Message-ID: <1139582415.317902.193610@f14g2000cwb.googlegroups.com>

bruno at modulix wrote:

> Looks like a memory problem then...

The system I am using has 2GB of memory, (unless you are syaing the
memory is faulty).

> Why storing error messages ? Why don't you just write'em out (be it to
> stdout or to a file) ?

I guess I could do that, (write them to a file as they are discovered).
Right now the error messages are stored in the array and then the the
array is scanned via, a for loop and the error messages are written to
several files in different formats based on the severity of the errors,
(on a per device basis, a per severity basis, etc.).  This keeps the
write statements to a minimum and in a central location of the script
instead of having several statements for each individual error message
spread throughout the script, (three write statements per error message
at over 500 error messages would be a significant change).

Not to complain but if I can't use arrays then thats a pretty
significant limitation.



From oliphant.travis at ieee.org  Mon Feb  6 12:38:10 2006
From: oliphant.travis at ieee.org (Travis E. Oliphant)
Date: Mon, 06 Feb 2006 10:38:10 -0700
Subject: Scientific Computing with NumPy
In-Reply-To: <ds7mrb$443$1@gemini.csx.cam.ac.uk>
References: <ds7bvh$ab1$2@gemini.csx.cam.ac.uk>	<mailman.1482.1139225595.27775.python-list@python.org>	<ds7ch4$bj7$1@gemini.csx.cam.ac.uk>	<1139229403.024321.215780@o13g2000cwo.googlegroups.com>
	<ds7mrb$443$1@gemini.csx.cam.ac.uk>
Message-ID: <ds81i2$tjf$1@sea.gmane.org>

mclaugb wrote:
> Is Scipy the same thing as ScientificPython?

No.  They are two separate projects.  Scientific Python is still 
Numeric-only.  SciPy 0.3.x is Numeric-based  and SciPy 0.4.x is NumPy-based.

The developers for NumPy are also the developers for SciPy (for the most 
part).

There is a mailing list numpy-discussions at lists.sourceforge.net  where 
all of your questions can be answered.




From gene.tani at gmail.com  Mon Feb 13 14:44:50 2006
From: gene.tani at gmail.com (gene tani)
Date: 13 Feb 2006 11:44:50 -0800
Subject: hard disk activity
In-Reply-To: <1139857505.376840.37440@g43g2000cwa.googlegroups.com>
References: <1139850420.902979.71620@o13g2000cwo.googlegroups.com>
	<g9i1v1lbf2rhmgskmkh5f9mt73s67umckk@4ax.com>
	<1139857505.376840.37440@g43g2000cwa.googlegroups.com>
Message-ID: <1139859890.407497.124870@o13g2000cwo.googlegroups.com>


VSmirk wrote:
> I'm working primarily on Windows XP, but my solution needs to be cross
> platform.
>
> The problem is that I need more than the fact that a file has been
> modified.  I need to know what has been modified in that file.
>
> I am needing to synchronize the file on a remote folder, and my current
> solution, which simply copies the file if a date comparison or a
> content comparison, becomes a bit unmanageable for very large files.
> Some of the files I'm working with are hundreds of MB in size, or
> larger.
>
> So I need to skip copying a hundred MB file that has had only a few
> bytes changed and instead identify which few bytes have changed and
> where those changes are.  I was thinking having a module that worked
> below the file system level, at the device level, might be a place to
> look for a solution.

Sounds like the diff'g files part is the crux of it, look at sequence
matching libs like (don't know if they'll handle strings this big:

http://docs.python.org/lib/module-difflib.html

for watching files' last-mod flags:
http://www.amk.ca/python/simple/dirwatch.html
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/215418

http://python-fam.sourceforge.net/

http://pyinotify.sourceforge.net/

(there's a few recipes in the online cookbook, in fact)



From xavier.morel at masklinn.net  Sun Feb  5 11:16:38 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Sun, 05 Feb 2006 17:16:38 +0100
Subject: Importing a class, please help...
In-Reply-To: <a1pFf.138$CO7.124@fe02.lga>
References: <a1pFf.138$CO7.124@fe02.lga>
Message-ID: <ds588l$aii$1@aphrodite.grec.isp.9tel.net>

anon wrote:
> Would somebody please drop me a hint, please?
> 
Yeah, the definition of "JAR" is Java ARchive, why the hell would a 
Python script be able to read a JAR in the first place (truth is it is, 
a JAR file is nothing but a renamed ZIP, therefore the zipfile module 
allows you to read it's content) and -- more importantly -- import Java 
classes.

Notice the difference between *Python* script and *Java* class? That's 
because they're two different languages.
If you want to use Java classes and modules in a Pythonic context, you 
want Jython (http://www.jython.org/) not Python (http://www.python.org/)


From tim.hochberg at ieee.org  Mon Feb 20 22:25:01 2006
From: tim.hochberg at ieee.org (Tim Hochberg)
Date: Mon, 20 Feb 2006 20:25:01 -0700
Subject: Changing values of 1st column of a matrix using take(mymatrix,
	(0, ),   axis=1)
In-Reply-To: <20060221021907.11316.qmail@web35802.mail.mud.yahoo.com>
References: <20060221021907.11316.qmail@web35802.mail.mud.yahoo.com>
Message-ID: <dte16q$78u$1@sea.gmane.org>

Anthony Liu wrote:
> I am talking about the 'take' method of numarray.
> 
> See here for more info:
> 
> http://stsdas.stsci.edu/numarray/Doc/node33.html
> 
> If I initialize a matrix 'mymatrix' by zeros((3,3),
> type="Float64"), I get a 3*3 matrix of all zeros.
> 
> Look:
> 
> 
>>>>from numarray import *
>>>>mymatrix = zeros((3,3), type="Float64")
>>>>mymatrix
> 
> array([[ 0.,  0.,  0.],
>        [ 0.,  0.,  0.],
>        [ 0.,  0.,  0.]])
> 
> 
> I want to change the zeros of only the first column to
> 1's.  In other words, I want to get:
> 
> array([[ 1.,  0.,  0.],
>        [ 1.,  0.,  0.],
>        [ 1.,  0.,  0.]])
> 
> The 'take' method is able to take out the first
> column, but I am not sure if there is a good way of
> changing all values of the first column to 1's.
> 
> Of course, I know that I can achieve my goal pretty
> easily with this:
> 
> for i in range(3): mymatrix[i,0] = 1.0
> 
> I am just wondering if there is an existing numarray
> method that elegantly does it for me.

mymatrix[:,0] = 1.0

> 
> 
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around 
> http://mail.yahoo.com 



From fredrik at pythonware.com  Mon Feb  6 04:15:02 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 6 Feb 2006 10:15:02 +0100
Subject: Python V2.4.2 source code
References: <43e710de$0$23286$db0fefd9@news.zen.co.uk>
Message-ID: <ds742q$bgu$1@sea.gmane.org>

John Dean wrote:

> Does anybody know from where I can get a copy of the source for Python
> V2.4.2. I downloaded what is reckoned to be the source code from
> www.python.org, but is turns out to be the MacXOS version with the core
> modules missing.

the source archives available here seem to be complete:

    http://www.python.org/2.4.2/

note that there are no separate source distributions for specific platforms.
the source archive contain lots of platform-specific directories and modules,
including modules for OS X.

</F>





From john at baumanfamily.com  Mon Feb  6 00:51:35 2006
From: john at baumanfamily.com (John Bauman)
Date: Mon, 6 Feb 2006 00:51:35 -0500
Subject: win32com, BSTR, and null terminated strings
References: <mzh5xzyr.fsf@qwhd746oihd49.net>
Message-ID: <lUadna9z9p16fnveUSdV9g@ptd.net>


"Matt Helm" <eric at qwhd746oihd49.net> wrote in message 
news:mzh5xzyr.fsf at qwhd746oihd49.net...
> However, what is the proper way to recover the actual string? I have
> been using:
>
>    r.split("\0", 1)[0]
>
I'd prefer to use
r[:-1]
to strip off the last character of the string. 




From uval at rz.uni-karlsruhe.de  Fri Feb 10 17:29:47 2006
From: uval at rz.uni-karlsruhe.de (=?ISO-8859-1?Q?Sch=FCle_Daniel?=)
Date: Fri, 10 Feb 2006 23:29:47 +0100
Subject: is there a better way?
In-Reply-To: <dsika7$ise$1@gemini.csx.cam.ac.uk>
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
	<dsika7$ise$1@gemini.csx.cam.ac.uk>
Message-ID: <dsiq11$c36$1@news2.rz.uni-karlsruhe.de>

[...]

> 
> What not
> 
> for x in list:
>   if x == O:
>     break
>   storage.append(x)
> 

i think this may take too long
better aproach would be to test for zero from the end

Regards, Daniel



From steve at REMOVETHIScyber.com.au  Fri Feb 24 04:58:33 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 24 Feb 2006 20:58:33 +1100
Subject: A C-like if statement
References: <hp-dnY20cusOnGPeRVn-rg@nmt.edu> <dtl04p$5q2$1@reader2.panix.com>
	<sdadnS6nfNnbmmPeRVn-sw@nmt.edu>
	<pan.2006.02.23.22.14.53.56541@REMOVETHIScyber.com.au>
	<1140742149.011750.321530@z34g2000cwc.googlegroups.com>
Message-ID: <pan.2006.02.24.09.58.32.497698@REMOVETHIScyber.com.au>

On Thu, 23 Feb 2006 16:49:09 -0800, bonono wrote:

> 
> Steven D'Aprano wrote:
>> On Thu, 23 Feb 2006 12:04:38 -0700, Bob Greschke wrote:
>>
>> >> try:
>> >>    i = a.find("3")
>> >>    print "It's here: ", i
>> >> except NotFound:
>> >>    print "No 3's here"
>> >
>> > Nuts.  I guess you're right.  It wouldn't be proper.  Things are added or
>> > proposed every day for Python that I can't even pronounce, but a simple 'if
>> > (I = a.find("3")) != -1' isn't allowed.  Huh.  It might be time to go back
>> > to BASIC. :)
>>
>> There are *reasons* why Python discourages functions with side-effects.
>> Side-effects make your code hard to test and harder to debug.
>>
> 
>>>> "test".index("a")
> Traceback (most recent call last):
>   File "<pyshell#0>", line 1, in -toplevel-
>     "test".index("a")
> ValueError: substring not found
>>>> "test".find("a")
> -1


Did you have a point?

In case you haven't been following the entire thread, the original bit of
code above (the try block using the find method) wasn't mine. It just
happened to be quoted in my post.


Now that's a Python wart: using >>> for the prompt for interactive
sessions. It makes it ambiguous when posting code in email or newsgroups,
especially once the code gets quoted a few times.


-- 
Steven.



From duncan.booth at invalid.invalid  Wed Feb  8 08:41:49 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 8 Feb 2006 13:41:49 GMT
Subject: os.walk() dirs and files
References: <dscrjr$joa$1@solaris.cc.vt.edu> <dscs1j$k9l$1@solaris.cc.vt.edu>
Message-ID: <Xns97648B528F8DDduncanbooth@127.0.0.1>

rtilley wrote:

> Just to clarify. In this particular case, I do not need to differentiate 
> between files and dirs... so would it be possible to do something such 
> as this:
> 

How about just concatentating the two lists:

> for root, dirs, files in os.walk(path):
>      for fs_object in files, dirs:
       for fs_object in files + dirs:
>          ADD fs_object to dictionary



From bonono at gmail.com  Tue Feb 21 07:53:21 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 21 Feb 2006 04:53:21 -0800
Subject: how to break a for loop?
In-Reply-To: <1140525737.483568.144330@o13g2000cwo.googlegroups.com>
References: <1140476451.649515.127230@g44g2000cwa.googlegroups.com>
	<1140525737.483568.144330@o13g2000cwo.googlegroups.com>
Message-ID: <1140526400.966009.138980@g14g2000cwa.googlegroups.com>


bearophileH... at lycos.com wrote:
> This time it seems that using itertools gives slower results, this is
> the test code:
Understandable, as dropwhile still needs to go through the whole list
and the difference will be larger when the list get longer. Though I
still prefer that if the list is not horribly long as it is like a
spec. But then, one can always name the fast in place del slice version
like "dropwhileFast".



From steven.bethard at gmail.com  Tue Feb  7 10:58:04 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 07 Feb 2006 08:58:04 -0700
Subject: Question about idioms for clearing a list
In-Reply-To: <1139306562.105655.23200@f14g2000cwb.googlegroups.com>
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>
	<1139306562.105655.23200@f14g2000cwb.googlegroups.com>
Message-ID: <1PmdnYKN0KoUXnXenZ2dnUVZ_vydnZ2d@comcast.com>

Ben Sizer wrote:
>> Likewise, the del keyword is fundamental -- if you
>> can't get, set, and del, then you need to go back to collections
>> school.
> 
> I have hardly used the del keyword in several years of coding in
> Python. Why should it magically spring to mind in this occasion?
> Similarly I hardly ever find myself using slices, never mind in a
> mutable context.

I just grepped through my codebase, and while I do see a number of dels 
with dicts, and a number of dels with instance attributes, I see only 
two dels with lists, both from the same module.  So I think your point 
about infrequent use of del, at least with lists, is pretty valid.

I suspect this is reinforced by the fact that del is usually not the 
right way to go when using lists -- repeated dels in the middle of a 
list is almost always less efficient than other techniques due to the 
underlying array implementation.

That said, I didn't find anywhere in my codebase that I needed to clear 
a list (i.e. where ``L = []`` wasn't perfectly fine), while I do find a 
small number of dict clears.  So I guess I don't really care if clearing 
a list is a little less intuitive than clearing a dict.

STeVe


From fredrik at pythonware.com  Wed Feb 22 04:19:14 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 22 Feb 2006 10:19:14 +0100
Subject: gmail written in python?
References: <1140599357.785106.230270@f14g2000cwb.googlegroups.com>
Message-ID: <dthaaj$vaq$1@sea.gmane.org>

ongkokleong at gmail.com wrote:

> any idea?

http://panela.blog-city.com/python_at_google_greg_stein__sdforum.htm

</F> 





From gene.tani at gmail.com  Sun Feb 12 13:01:32 2006
From: gene.tani at gmail.com (gene tani)
Date: 12 Feb 2006 10:01:32 -0800
Subject: Tracking down memory leaks?
In-Reply-To: <1139756812.174596.159860@g14g2000cwa.googlegroups.com>
References: <1139749861.949765.282310@z14g2000cwz.googlegroups.com>
	<1139756812.174596.159860@g14g2000cwa.googlegroups.com>
Message-ID: <1139765997.666691.79400@g43g2000cwa.googlegroups.com>


mensanator at aol.com wrote:
> MKoool wrote:
> > I have an application with one function called "compute", which given a
> > filename, goes through that file and performs various statistical
> > analyses.  It uses arrays extensively and loops alot.  it prints the
> > results of it's statistical significance tests to standard out.  Since
> > the compute function returns and I think no variables of global scope
> > are being used, I would think that when it does, all memory returns
> > back to the operating system.
> >
> > Instead, what I see is that every iteration uses several megs more.
> > For example, python uses 52 megs when starting out, it goes through
> > several iterations and I'm suddenly using more than 500 megs of ram.
> >
> > Does anyone have any pointers on how to figure out what I'm doing
> > wrong?
>
> Are you importing any third party modules? It's not unheard of that
> someone else's code has a memory leak.
>

- sounds like you're working with very large, very sparse matrices,
running LSI/SVD or a PCA/covariance analysis, something like that.  So
it's a specialized problem, you need to specify what libs you're using,
what your platform / O/S is, py release, how you installed it, details
about C estensions, pyrex/psyco/swig, the more info you supply, the
mroe you get back.

- be aware there's wrong ways to measure memory, e.g. this long thread:
http://mail.python.org/pipermail/python-list/2005-November/310121.html



From shearichard at gmail.com  Sun Feb 19 19:26:15 2006
From: shearichard at gmail.com (shearichard at gmail.com)
Date: 19 Feb 2006 16:26:15 -0800
Subject: MySQLDB - parameterised SQL - "TypeError: not all arguments converted
	during string formatting"
Message-ID: <1140395175.409078.281390@o13g2000cwo.googlegroups.com>

Hi - I have written some python to insert a row into a table using
MySQLDB. I have never before written SQL/Python using embedded
parameters in the SQL and I'm having some difficulties. Could someone
point me in the right direction please ?

The python looks like this :

import MySQLdb
import MySQLdb.cursors
conn = MySQLdb.Connect(host='localhost', user='abc,passwd='def',
db='ghi',compress=1)

cursor = conn.cursor(cursorclass=MySQLdb.cursors.DictCursor)
sqlQuery = "INSERT INTO EVA_COMPANY
(COM_ADDRESS,COM_AUTOID,COM_COMPANY_ADDRESS,COM_STRUCT_OWNER_CODE)
VALUES (?,?,?,?) "
print sqlQuery
sql = cursor.execute(sqlQuery,("test","NULL","Tester1017",5))
cursor.close()
conn.commit()

... and the table looks like this ...

CREATE TABLE `eva_company` (
  `COM_AUTOID` int(9) unsigned NOT NULL auto_increment,
  `COM_COMPANY_NAME` varchar(128) NOT NULL,
  `COM_TRADING_NAME` varchar(128) default NULL,
  `COM_ADDRESS` varchar(256) NOT NULL,
  `COM_POSTAL_ADDRESS` varchar(256) default NULL,
  `COM_CONTACT_NAME` varchar(56) default NULL,
  `COM_CONTACT_POSITION` varchar(56) default NULL,
  `COM_CONTACT_TELEPHONE` varchar(16) default NULL,
  `COM_CONTACT_FAX` varchar(16) default NULL,
  `COM_CONTACT_EMAIL` varchar(256) default NULL,
  `COM_STRUCT_OWNER_CODE` int(9) unsigned default NULL,
  `COM_INDUSTRY_CODE` varchar(16) default NULL,
  `COM_INDUSTRY_DESC` varchar(56) default NULL,
  `COM_NUMBER_OF_SITES` int(9) default NULL,
  `COM_NATURE_OF_RELATIONSHIP` varchar(128) default NULL,
  PRIMARY KEY  (`COM_AUTOID`),
  KEY `IDX_COM1` (`COM_STRUCT_OWNER_CODE`),
  KEY `IDX_COM0` (`COM_COMPANY_NAME`),
  CONSTRAINT `FK_COS_COM0` FOREIGN KEY (`COM_STRUCT_OWNER_CODE`)
REFERENCES `eva_code_comp_struct_ownership` (`COS_AUTOID`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC;

... but when I try to execute the python I get an error ...

Traceback (most recent call last):
  File "sheadbtest1.py", line 8, in ?
    sql = cursor.execute(sqlQuery,("test","NULL","Tester1017",5))
  File
"C:\bin\installed\Python2.4.1\Lib\site-packages\MySQLdb\cursors.py",
line 132, in execute
    self.errorhandler(self, TypeError, m)
  File
"C:\bin\installed\Python2.4.1\Lib\site-packages\MySQLdb\connections.py",
line 33, in defaulterrorhandler
    raise errorclass, errorvalue
TypeError: not all arguments converted during string formatting

... as I say if anyone could provide me with some tips I'd appreciate
it.

thanks

richard shea.



From peter at engcorp.com  Thu Feb  9 10:06:02 2006
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 09 Feb 2006 10:06:02 -0500
Subject: thread dump
In-Reply-To: <1139484386.059484.165210@f14g2000cwb.googlegroups.com>
References: <1139484386.059484.165210@f14g2000cwb.googlegroups.com>
Message-ID: <dsfloc$k69$2@sea.gmane.org>

jsuch wrote:
> I'm using Fedora core 3 and python 2.4.2, is there any way to obtain
> the linux pid of a python thread? I need it because I want to know CPU
> usage per thread.

Not sure if you were the same person that posted this request not six 
minutes earlier under a thread titled "Thread Dump of a python process" 
(a much better subject that this one, by the way)...

In any case, see my reply in that thread.

-Peter



From reply.in.the.newsgroup at my.address.is.invalid  Thu Feb  9 18:02:58 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Fri, 10 Feb 2006 00:02:58 +0100
Subject: pythonic exec* spawn*
References: <mailman.1686.1139521339.27775.python-list@python.org>
Message-ID: <lbinu19o3nkqn5elsn4dqbvoueonh93ral@4ax.com>

Daniel Nogradi:
>I would like to pass the whole object at once to the second python
>program which should start doing its thing with it while the original 
>program should keep running.

os.fork() does that (on Mac and Unix).

-- 
Ren? Pijlman


From bonono at gmail.com  Sun Feb 19 22:01:01 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 19 Feb 2006 19:01:01 -0800
Subject: number ranges (was Re: Matlab page on scipy wiki)
In-Reply-To: <mailman.2138.1140391726.27775.python-list@python.org>
References: <e86a5fd00602131854s73191cbbu742d4434ad074908@mail.gmail.com>
	<1139945386.3346.38.camel@pc1.cole.uklinux.net>
	<43F8D881.5030804@sympatico.ca>
	<eV4Kf.152$XZ3.31816@news20.bellglobal.com>
	<mailman.2138.1140391726.27775.python-list@python.org>
Message-ID: <1140404461.216068.280700@g44g2000cwa.googlegroups.com>


Tim Hochberg wrote:
> Colin J. Williams wrote:
>
> >>
> >>It would be good if the range and slice could be merged in some way,
> >>although the extended slice is rather complicated - I don't understand it.
> >>
> >>   The semantics for an extended slicing are as follows. The primary
> >>   must evaluate to a mapping object, and it is indexed with a key that
> >>   is constructed from the slice list, as follows. If the slice list
> >>   contains at least one comma, the key is a tuple containing the
> >>   conversion of the slice items; otherwise, the conversion of the lone
> >>   slice item is the key. The conversion of a slice item that is an
> >>   expression is that expression. The conversion of an ellipsis slice
> >>   item is the built-in |Ellipsis| object. The conversion of a proper
> >>   slice is a slice object (see section section 4.2 The standard type
> >>   hierarchy <http://www.network-theory.co.uk/docs/pylang/ref_30.html>)
> >>   whose |start|, |stop| and |step| attributes are the values of the
> >>   expressions given as lower bound, upper bound and stride,
> >>   respectively, substituting |None| for missing expressions.
> >>
> >>[source: http://www.network-theory.co.uk/docs/pylang/ref_60.html]
> >>
> >>The seems to be a bit of a problem with slicing that needs sorting out.
> >>
> >>The syntax for a slice list appears to allow multiple slices in a list:
> >>
> >>   extended_slicing     ::=     primary <primaries.html#tok-primary> "["
> >>   slice_list <slicings.html#tok-slice_list> "]"
> >>   slice_list     ::=     slice_item <slicings.html#tok-slice_item> (","
> >>   slice_item <slicings.html#tok-slice_item>)* [","]
> >>
> >>but the current interpreter reports an error:
> >>
> >>    >>> a= range(20)
> >>    >>> a[slice(3, 9, 2)]
> >>   [3, 5, 7]
> >>    >>> a[slice(3, 9, 2), slice(5, 10)]
> >>   Traceback (most recent call last):
> >>     File "<interactive input>", line 1, in ?
> >>   TypeError: list indices must be integers
> >>    >>>
> >>
>
> Extended slicing has nothing to do with lists. All that gobbeldy gook is
> trying to tell you is what the interpreter does with O[1:2:3, 4:5:6]
> where O is some arbitrary object. What it does is:
>
> O[1:2:3, 4:5:6] == O[slice(1,2,3), slice(4,5,6)]
>                  == O.__getitem__((slice(1,2,3), slice(4,5,6)))
>
> In the case of python lists, __getitem__ doesn't support multiple slice
> arguments. However, you are free to define your own types which do
> support multiple slices.
>
That explains it but the current documentation in the reference manual
doesn't(I also tried what Colin did when reading that part). And as I
mentioned in another post, the current documentation suggests that
extended slicing is not supported for sequence type. As it said the
primary must be evaluated to mapping object for extended slicing.
Though it seems it doesn't matter as all python does now is turn
[start:stop:stride] into slice object and pass that to __getitem__, no
matter what object it is.



From claird at lairds.us  Fri Feb 17 17:08:03 2006
From: claird at lairds.us (Cameron Laird)
Date: Fri, 17 Feb 2006 22:08:03 GMT
Subject: HTTP & tcl
References: <1140055458.631283.202510@f14g2000cwb.googlegroups.com>
	<1140079405.290586.298270@g44g2000cwa.googlegroups.com>
Message-ID: <c8shc3-7ms.ln1@lairds.us>

In article <1140079405.290586.298270 at g44g2000cwa.googlegroups.com>,
Fuzzyman <fuzzyman at gmail.com> wrote:
>
>alf wrote:
>> Hi
>>
>> I would like to convert the wctpXml-1.3.py program to Tcl (line by
>> line).
>> See http://sourceforge.net/project/showfiles.php?group_id=29217
>> This program sends pages using WCTP.  I know nothing about Python or
>> XML but this program is small and seems straightforward and I am sure
>> that I will be able to figure it out - with a little help ;-)
>> Currently I am stuck in not being able to identify the Tcl equivalent
>> of Python's "putrequest", as in:
>> h = httplib.HTTP("wctp.skytel.com",80)
>> h.putrequest("POST","/wctp")
>>
>
>You'll get more help on Tcl syntax in a Tcl group. :-)
>
>Of the HTTP object, the Python documentation says :
			.
			.
			.
>In other words - you're creating an HTTP connection and request. You'll
>need to find an 'equivalent' library for Tcl and convert the request
>using hte semantics of whatever library you choose.
			.
			.
			.
If you don't immediately see what you're after in <URL:
http://wiki.tcl.tk/http >, post in comp.lang.tcl, and 
we'll straighten this out.


From dickey at saltmine.radix.net  Wed Feb  8 06:20:49 2006
From: dickey at saltmine.radix.net (Thomas Dickey)
Date: Wed, 08 Feb 2006 11:20:49 -0000
Subject: Problem with curses and UTF-8
References: <mailman.1566.1139345769.27775.python-list@python.org>
	<43E9234B.6030108@v.loewis.de>
Message-ID: <11ujl0hof3fql62@corp.supernews.com>

"Martin v. L?wis" <martin at v.loewis.de> wrote:
> Ian Ward wrote:
>> Any Ideas?

> I think there is one or more ncurses bugs somewhere.

indeed.  It might be nice to report them rather than jawing about it.

> The ncurses documentation suggests that you should link with
> ncurses_w instead of linking with ncurses - you might try
> that as well. If it helps, please do report back.

ncursesw

> Ultimately, somebody will need to debug ncurses to find out
> what precisely happens, and why.

no need for debugging - it's a well-known problem.  UTF-8 uses more than
one byte per cell, normal curses uses one byte per cell.  To handle UTF-8,
you need ncursesw.

-- 
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net


From jure at codeshift.net  Thu Feb 23 19:28:13 2006
From: jure at codeshift.net (Jure Vrscaj)
Date: Fri, 24 Feb 2006 01:28:13 +0100
Subject: remote module importing (urlimport)
In-Reply-To: <43FE4A94.8010709@codeshift.net>
References: <43FE4A94.8010709@codeshift.net>
Message-ID: <43FE531D.1000104@codeshift.net>

Sorry for the duplicate, I had some postfix issues.
cheers,
jure


From fabioz at esss.com.br  Mon Feb 20 11:51:32 2006
From: fabioz at esss.com.br (Fabio Zadrozny)
Date: Mon, 20 Feb 2006 13:51:32 -0300
Subject: editor for Python on Linux
In-Reply-To: <dtai6e$23m$2@ariane.blic.net>
References: <dtai6e$23m$2@ariane.blic.net>
Message-ID: <43F9F394.1090101@esss.com.br>

You could try Eclipse with Pydev: http://pydev.sf.net
or its commercial counterpart: Pydev Extensions: 
http://www.fabioz.com/pydev

-- runs on linux / mac / windows ...

Cheers,

Fabio

-- 
Fabio Zadrozny
------------------------------------------------------
Software Developer

ESSS - Engineering Simulation and Scientific Software
www.esss.com.br

Pydev Extensions
http://www.fabioz.com/pydev

PyDev - Python Development Enviroment for Eclipse
http://pydev.sf.net
http://pydev.blogspot.com




From nirsof at gmail.com  Fri Feb  3 12:24:40 2006
From: nirsof at gmail.com (nirsof at gmail.com)
Date: 3 Feb 2006 09:24:40 -0800
Subject: OS.MKDIR( ) Overwriting previous folder created...
In-Reply-To: <1138916342.531311.190570@g14g2000cwa.googlegroups.com>
References: <1138916342.531311.190570@g14g2000cwa.googlegroups.com>
Message-ID: <1138987480.382384.124740@g43g2000cwa.googlegroups.com>

The corect way is to try os.mkdir, catch the exception and check the
errno value, which tell you why the call failed.

If the directory exists, you can ignore the exception, if its another
error, you usually had to raise it again and let the caller handle it.

Example:
import errno

try:
    os.mkdir(path)
except OSError, err:
    if err.errno != errno.EEXIST:
        raise

Any other way may have race conditions, for example, you check if the
directory exits, and its missing, then another process or thread
creates it before you try to create the missing directory, and your
mkdir call will raise.



From rrr at ronadam.com  Mon Feb 27 05:19:49 2006
From: rrr at ronadam.com (Ron Adam)
Date: Mon, 27 Feb 2006 04:19:49 -0600
Subject: sort one list using the values from another list
In-Reply-To: <I6tMf.109755$4l5.106334@dukeread05>
References: <mailman.2447.1140969980.27775.python-list@python.org>
	<Bb-dncKoOeYvQ5zZRVn-uw@comcast.com>
	<1140981038.788111.93500@j33g2000cwa.googlegroups.com>
	<9bpMf.109707$4l5.58949@dukeread05>
	<1140990438.693026.14600@p10g2000cwp.googlegroups.com>
	<00sMf.109743$4l5.9230@dukeread05>
	<1hbdmux.1uvypp25sjx7jN%aleaxit@yahoo.com>
	<I6tMf.109755$4l5.106334@dukeread05>
Message-ID: <zpAMf.109772$4l5.24415@dukeread05>

Ron Adam wrote:
> Alex Martelli wrote:
>> Ron Adam <rrr at ronadam.com> wrote:
>>    ...
>>> Considering the number time I sort keys after getting them, It's the 
>>> behavior I would prefer.  Maybe a more dependable dict.sortedkeys() 
>>> method would be nice.  ;-)
>>
>> sorted(d) is guaranteed to do exactly the same thing as sorted(d.keys())
>> AND to be faster (would be pretty weird if it weren't faster...!).
>>
>> E.g., ...:
>>
>> helen:~ alex$ python -mtimeit -s'd=dict(enumerate("tarazoplay"))'
>> 'sorted(d.keys())'
>> 100000 loops, best of 3: 6.82 usec per loop
>>
>> helen:~ alex$ python -mtimeit -s'd=dict(enumerate("tarazoplay"))'
>> 'sorted(d)'
>> 100000 loops, best of 3: 5.98 usec per loop
>>
>>
>> Alex
> 
> 
> Yes, it did decrease it.  And simplified it as well. ;)
> 
> 
> def psort11(s1, s2):
>     d = dict(zip(s2, s1))
>     assert len(d) == len(s1)
>     sorted(d)
>     s1[:] = d.values()
> 

This probably should be:

def psort11(s1, s2):
     d = dict(zip(s2,s1))
     assert len(d) == len(s1)
     s1[:] = list(d[v] for v in sorted(d))



From bronger at physik.rwth-aachen.de  Mon Feb 20 16:35:12 2006
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Mon, 20 Feb 2006 22:35:12 +0100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<mailman.2131.1140377578.27775.python-list@python.org>
	<yfsbqx3ov29.fsf@oc.ex.ac.uk> <eq7pc3-ml5.ln1@lairds.us>
	<7cjpc3-2a.ln1@lairds.us>
Message-ID: <87irr967e7.fsf@wilson.homeunix.com>

Hall?chen!

claird at lairds.us (Cameron Laird) writes:

> In article <eq7pc3-ml5.ln1 at lairds.us>, I wondered:
>
>> [...]  Do you truly believe that fewer people would use Python if
>> its execution were faster?
>
> I think I can answer my own question: yes.  Since posting, I came
> across a different follow-up where Alexander explains that he sees
> healthy elements of the Python ethos--focus on a reliable, widely-
> used library, willingness to make Python-C partnerships, and so
> on--as results at least in part of early acceptance of Python as
> intrinsically slow.  That's too interesting an argument for me to
> respond without more thought.

I was rather stunned, too, when I read his line of thought.
Nevertheless, I think it's not pointless, albeit formulated in an
awkward way.  Of course, Python has not been deliberately slowed
down.

I don't know how strong the effect is that a language design which
doesn't allow for (easy to implement) fast execution speed makes you
write cleaner code, however, I must say that I feel so, too.  When I
came from C++ to Python I had to find my Pythonic style, and part of
it was that I threw away those ubiquitous little optimisations and
concentrated on formulating my idea in a clear and expressive way.

By the way, this is my main concern about optional static typing: It
may change the target group, i.e. it may move Python closer to those
applications where speed really matters, which again would have an
effect on what will be considered Pythonic.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus            ICQ 264-296-646


From mikael at isy.liu.se  Tue Feb 21 05:03:32 2006
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Tue, 21 Feb 2006 11:03:32 +0100
Subject: Little tool - but very big size... :-(
In-Reply-To: <mailman.2211.1140513270.27775.python-list@python.org>
References: <mailman.2211.1140513270.27775.python-list@python.org>
Message-ID: <dteo9g$3vp$1@news.lysator.liu.se>

Durumdara wrote:
> But it have very big size: 11 MB... :-(
> 
> The dist directory:
> [snip relatively small files]
> 2005.09.28.  12:41         1 867 776 python24.dll
> [snip relatively small files]
> 2006.01.10.  19:09         4 943 872 wxmsw26uh_vc.dll
> [snip relatively small files]
>              20 file        11 485 758 byte
> 
> I need to have more compressed result. Can I compress dll-s, pyd-s with
> Py2Exe ?
> Can I decrease the total size with something ?

I've snipped out the relatively small files above. Yes, true, some of 
them consume about 0.5MB each.

It seems to me that your choice of GUI framework is a major cost here. I 
have never used wxpython. Instead my GUIs are based on tkinter. What I 
typically end up with is roughly 7MB. My last example ended up in 7.5MB. 
Zipping the whole thing reduces that to 2.6MB. Is it completly out of 
the question to have a compressed version of the tool on your memory 
stick, and to decompress it on the examined computer before actually 
running the tool?

/MiO


From case.nelson at gmail.com  Mon Feb  6 18:40:24 2006
From: case.nelson at gmail.com (snoe)
Date: 6 Feb 2006 15:40:24 -0800
Subject: Code Feedback
In-Reply-To: <mailman.1526.1139264554.27775.python-list@python.org>
References: <1139247238.520281.144670@f14g2000cwb.googlegroups.com>
	<pan.2006.02.06.21.37.32.698385@wolf.com>
	<mailman.1526.1139264554.27775.python-list@python.org>
Message-ID: <1139269224.874385.24290@f14g2000cwb.googlegroups.com>

I believe the while 1: pass is there to keep the main thread alive
until all the readers are done. If you want the program to end after
the readers are done you can append them all to a list then iterate
through and wait for the threads to join()

if __name__=="__main__":

    library = Library()
    readers = input("Number of Readers?")
    readerlist = []
    for i in range(1,readers):
        newReader = Reader(library, "Reader" + str (i),
random.randint(1,7), random.randint(1,7))
        newReader.start()
        readerlist.append(newReader)
    for reader in readerlist:
        reader.join()



From python at hope.cz  Mon Feb 13 13:03:01 2006
From: python at hope.cz (Lad)
Date: 13 Feb 2006 10:03:01 -0800
Subject: Encoding
Message-ID: <1139853781.611888.60230@g44g2000cwa.googlegroups.com>

I have a script that uses utf-8 encoding. Now I would like to send some
data to an application ( on another server) that uses 1250 encoding.
How can I tell the server that the coming data will be in utf-8 code?
I tried this
params='some data'
h = httplib.HTTP(self.host)
h.putheader("Content-type", "multipart/form-data;
boundary=---------------------------7d329422844")
h.putheader("Content-length", "%d" % len(params))
h.putheader("Accept-Language", "us-en")
h.putheader('Accept', 'image/gif, image/x-xbitmap, image/jpeg,
image/pjpeg, */*')
h.putheader('User-Agent', 'Mozilla/4.0 (compatible; MSIE 6.0; Windows
NT 5.1)')
h.putheader('Host', 'server')
h.endheaders()
.....
....

but it doesn't work. The data are not encoded properly
Thanks for help
L.B.



From gabriel.barros at gmail.com  Sat Feb 25 18:49:43 2006
From: gabriel.barros at gmail.com (Gabriel B.)
Date: Sat, 25 Feb 2006 20:49:43 -0300
Subject: How to send an email with non-ascii characters in Python
In-Reply-To: <slrne00h9l.g7l.sybrenUSE@schuimige.unrealtower.org>
References: <1140775736.341876.314070@t39g2000cwt.googlegroups.com>
	<slrndvtn7p.e6o.sybrenUSE@schuimige.unrealtower.org>
	<1140777219.636561.47960@e56g2000cwe.googlegroups.com>
	<slrndvuma9.f5e.sybrenUSE@schuimige.unrealtower.org>
	<1140866239.019528.183190@t39g2000cwt.googlegroups.com>
	<slrne00h9l.g7l.sybrenUSE@schuimige.unrealtower.org>
Message-ID: <5175a81c0602251549q62862239x@mail.gmail.com>

2006/2/25, Sybren Stuvel <sybrenUSE at yourthirdtower.com.imagination>:
> Lad enlightened us with:
> > Body='R?d?c?ch M?rinka a ?kol?k K?ja
> > Mar?k'.decode('utf8').encode('windows-1250')# I use the text written
> > in my editor with utf-8 coding, so first I decode and then encode to
> > windows-1250

what does a string became when it's decoded?

I mean, it must be encoded in something, right?


From aleaxit at yahoo.com  Sun Feb 19 23:48:06 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 19 Feb 2006 20:48:06 -0800
Subject: Mac OS X Installation Problem
References: <yEncExpress_Rulz!_www.techsono.com_3223251899@firstva.com>
Message-ID: <1hb0xc9.10yrtlr17a58dnN%aleaxit@yahoo.com>

<Matt> wrote:

> aleaxit at yahoo.com (Alex Martelli) wrote:
> 
> >Edit a ~/.bashrc file to add /usr/local/bin to your PATH.
> 
> Hi Alex,
> 
> Easier said than done for a non-unix expert. Correct me if I am wrong. Bash
> looks at the contents of the PATH variable to decided which directories it
> should scan when parsing a command. If I type "Python -v", it will look in all
> of those directories for a file called "Python" and then execute it, passing
> it the -v parameter. Right?

Right.  The uppercase P in 'Python' would make the search fail in just
about every Unix in the world, but MacOSX is the exception (at least if
you're using its default HFS+ filesystem) and lets you be sloppy with
capitalization.


> I've been googling around for about an hour now, and I can't find any
> instructions on how to create or edit a .bashrc file. I tried to make one of

That depends on what text editor you favour.  Me, I love gvim, but most
people hate it.  MacOSX comes with TextEdit, scarce but really not
controversial, and emacs, the One Editor to Rule Them All.  TextWrangler
and subethaedit, both freely downloadable, are among the most beloved
free editors; BBEdit, I've heard, is widely considered the best for-pay
one.  What text editor you choose to edit text files on MacOSX, be it a
free or for-pay one, is hardly a suitable subject for the
comp.lang.python newsgroup, of course -- I apologize for the OT.

> Is there a web page somewhere that explains this?

There are many, basically one for each text editor program you may
choose.  TextEdit has a predilection for saving .RTF (a marked-up text
format Microsoft Word also likes) rather than plain text files, so I
would not recommend it in general, by the way -- too easy to err.

BTW, like in every other Unix, if you're having problem saving to a
textfile named .foobar, save to foobar without the initial dot, then
from a Terminal prompt, mv foobar .foobar  -- that's all it takes.

There are innumerable books and webpages about MacOSX and other Unix
variants, mostly pretty orthogonal to any Python issues or interests but
nevertheless interesting.  O'Reilly's "Learning Unix for Mac OS X
Tiger", for example, is really quite a good text.


Alex


From pink at odahoda.de  Fri Feb 17 14:26:51 2006
From: pink at odahoda.de (Benjamin Niemann)
Date: Fri, 17 Feb 2006 20:26:51 +0100
Subject: Another stupid newbie question
References: <1140203709.145048.314180@g43g2000cwa.googlegroups.com>
Message-ID: <dt581r$ql8$1@online.de>

Byte wrote:

> How can I make the following code:
> 
> from random import random
> 
> 
> 
> def stuff(a, mx):
>     x = 2
>     while x == 2:
>         x = random()
>         if x == mx: print x
>         else: print 'No luck,', x
>         x = 2
> 
> Stop when x == mx?

What's the intention behind setting x = 2 at all?

def stuff(a, mx):
    while True:
        x = random()
        if x == mx: print x
        else: print 'No luck,', x

Should do the same as you're code above.

If stuff will never be called with mx=None, I would suggest using

def stuff(a, mx):
    x = None
    while x != mx:
        x = random()
        if x == mx: print x
        else: print 'No luck,', x

Also note that random() returns a float and it is *very* unlikely that the
condition x == mx will ever come true

-- 
Benjamin Niemann
Email: pink at odahoda dot de
WWW: http://www.odahoda.de/


From grflanagan at yahoo.co.uk  Tue Feb 21 09:51:09 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 21 Feb 2006 06:51:09 -0800
Subject: algorithm, optimization, or other problem?
In-Reply-To: <1140532888.539864.52200@o13g2000cwo.googlegroups.com>
References: <mailman.2223.1140524756.27775.python-list@python.org>
	<1140532888.539864.52200@o13g2000cwo.googlegroups.com>
Message-ID: <1140533469.771707.112230@z14g2000cwz.googlegroups.com>


Gerard Flanagan wrote:
> Brian Blais wrote:
> > Hello,
> >
> > I am trying to translate some Matlab/mex code to Python, for doing neural
> > simulations.  This application is definitely computing-time limited, and I need to
> > optimize at least one inner loop of the code, or perhaps even rethink the algorithm.
> >    The procedure is very simple, after initializing any variables:
> >
> > 1) select a random input vector, which I will call "x".  right now I have it as an
> > array, and I choose columns from that array randomly.  in other cases, I may need to
> > take an image, select a patch, and then make that a column vector.
> >
> > 2) calculate an output value, which is the dot product of the "x" and a weight
> > vector, "w", so
> >
> > 	y=dot(x,w)
> >
> > 3) modify the weight vector based on a matrix equation, like:
> >
> > 	w=w+ eta * (y*x - y**2*w)
> >                ^
> >                |
> >                +---- learning rate constant
> >
> > 4) repeat steps 1-3 many times
> >
>
>
> Brian
>
> ETA = 0.001
> INV_TAU = 1.0/100.0
>
> rather than:
>
> > params={}
> > params['eta']=0.001;
> > params['tau']=100.0;
>

or:

ETA = params['eta']
INV_TAU = 1.0/params['tau']


Gerard

> ie. take the dictionary lookup (and the repeated division) out?
>
> If you have a collection of random vectors do you gain anything by
> *choosing* them randomly?
>
> I'm not exactly sure if it's equivalent to your existing code, but how
> about:
>
> 	x=random((100,250000))
> 	w=random((100,1));
> 	th=random((1,1))
> 	for vector in x:
> 		...
> 		w=w+ ETA * (y*vector - y**2*w)
> 		th = th + INV_TAU *(y**2-th)
> 		...
>
> ?  (I'm not familar with Numeric)
>
> Gerard
>
> > old_mx=0;
> > for e in range(100):
> >
> >      rnd=randint(0,numpats,250000)
> >      t1=time.time()
> >      if 0:  # straight python
> >          for i in range(len(rnd)):
> >              pat=rnd[i]
> >              xx=reshape(x[:,pat],(1,-1))
> >              y=matrixmultiply(xx,w)
> >              w=w+params['eta']*(y*transpose(xx)-y**2*w);
> >              th=th+(1.0/params['tau'])*(y**2-th);
> >      else: # pyrex
> >          dohebb(params,w,th,x,rnd)
> >      print time.time()-t1
> > 
> >



From physci at gmail.com  Sun Feb 26 19:08:38 2006
From: physci at gmail.com (physci at gmail.com)
Date: 26 Feb 2006 16:08:38 -0800
Subject: wxGlade, wxPython.... pyOpenGL wxWidget?
References: <1140993655.993069.196880@u72g2000cwu.googlegroups.com>
	<1140995247.471750.174110@e56g2000cwe.googlegroups.com>
Message-ID: <1140998918.107680.26950@j33g2000cwa.googlegroups.com>

Ok, I initially thought the Tkinter route would be too "low level" (Ha,
low level python), but I noticed a link to VTK which looks promising.
Thanks for your quick reply!

Derek.



From tim.golden at viacom-outdoor.co.uk  Mon Feb 20 09:19:37 2006
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Mon, 20 Feb 2006 14:19:37 -0000
Subject: Print a PDF transparently
Message-ID: <9A28C052FF32734DACB0A288A3533991044D258B@vogbs009.gb.vo.local>

[Daniel Crespo]
| 
| > Have you seen this?
| >     http://tgolden.sc.sabren.com/python/win32_how_do_i/print.html
| > In particular, the section on using win32print directly.
| 
| Yes, I have. The problems is that an external program is launched for
| handling the file and print it. 

[sorry, bit long-winded, but trying to help]

I think the poster was referring to the situation you 
described where the problem reduced to sending a .ps
file directly to a postscript-capable printer.

To put things in as much of a nutshell as I can, I
think the following are true:

1) You have a document in some format which
you wish to print either via Postscript or PDF.

2) You do have postscript-enabled printers available.

3) As far as possible, you don't really want to install 
external apps across 70 offices.

What's not entirely clear is the extent to which you
can automate the generation of a postscript doc. Let's
assume that this can be done centrally. If that's the
case then you can take the file and use the technique
described in the link above, but specifically in this
section:

http://tgolden.sc.sabren.com/python/win32_how_do_i/print.html#win32print

which hasn't to do with running Acrobat or Ghostscript.

Basically, adapting the example, you'd do this:

<code>
import win32print
printer_name = win32print.GetDefaultPrinter ()
#
# raw_data could equally be raw PCL/PS read from 
#  some print-to-file operation
#
name_of_postscript_file = "document.ps"
raw_data = open (name_of_postscript_file, "rb").read ()

hPrinter = win32print.OpenPrinter (printer_name)
try:
  hJob = win32print.StartDocPrinter (hPrinter, 1, ("test of raw data",
None, "RAW"))
  try:
    win32print.WritePrinter (hPrinter, raw_data)
  finally:
    win32print.EndDocPrinter (hPrinter)
finally:
  win32print.ClosePrinter (hPrinter)

</code>

If you're not really sure how to get a postscript
doc, I usually just install an AppleLaserwriter of some
description as a driver, printing to file, and just
generate things that way. Exactly how you do that
depends on what the original document is.

Now, if the original is in PDF (ie PDF isn't simply
the staging post I've assumed it was), you'll need
to use *something* like ghostscript to print or
to generate postscript. Automating Acrobat Reader 
is a nightmare, because there's always something 
you don't want to happen -- it stays open, or you 
can't specify the printer to use, or something.
There are other PDF-display tools out there
(someone mentioned one recently on c.l.py and
there's xpdf as well, which might help).

TJG

________________________________________________________________________
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From mooquack at suad.org  Wed Feb  1 20:48:05 2006
From: mooquack at suad.org (Kirk McDonald)
Date: Wed, 01 Feb 2006 17:48:05 -0800
Subject: cgi - secure sessions
In-Reply-To: <1138844380.094365.223840@g44g2000cwa.googlegroups.com>
References: <1138842390.012855.107610@g44g2000cwa.googlegroups.com>
	<7x8xsuczxz.fsf@ruckus.brouhaha.com>
	<1138844380.094365.223840@g44g2000cwa.googlegroups.com>
Message-ID: <43e163d9$1@nntp0.pdx.net>

GazaM wrote:
> What I have is a cgi script run through a server
> side include line in the html, which looks for the session cookie, if
> it is present will say 'logged in as "user"' and if the cookie isn't
> there will display a login form. Now, the big showstopper here is that,
> because session cookies are stored in http headers sent by the client
> (afaik) the cgi script can't get any, because the http headers are
> passed onto the html file and any cgi scripts inside don't get
> anything... is there a workaround possible? 

Python has a built-in Cookie module:

http://www.python.org/doc/2.4.2/lib/module-Cookie.html

It may simplify matters.

-Kirk McDonald


From timsson at gmail.com  Mon Feb 13 14:16:05 2006
From: timsson at gmail.com (timsson)
Date: 13 Feb 2006 11:16:05 -0800
Subject: Bjam Boost Python Build
Message-ID: <1139858165.548101.17180@g14g2000cwa.googlegroups.com>

I need some help here.  When i build using the following jamfile it
moves my build files into the directories specified below except for
the boost_python.dll.   What would I add in to make the
boost_python.dll go to the same directory as the rest of the files.

SubDir TOP Dummy;

import python ;

extension Dummy: Dummy.cpp
        <template>@boost/libs/python/build/extension ;

stage $(TOP)/Tie : <pyd>Dummy;

InstallFile $(TOP)\\Tie : test_Dummy.py ;



From tuvas21 at gmail.com  Mon Feb 20 15:24:08 2006
From: tuvas21 at gmail.com (Tuvas)
Date: 20 Feb 2006 12:24:08 -0800
Subject: Canvas clicking stuff
In-Reply-To: <1140466964.673708.207240@o13g2000cwo.googlegroups.com>
References: <1140466964.673708.207240@o13g2000cwo.googlegroups.com>
Message-ID: <1140467048.229323.213010@o13g2000cwo.googlegroups.com>

I guess I should have mentioned that the canvas is a Tkinter canvas,
but, well, I guess that could be infered.



From onurb at xiludom.gro  Wed Feb  8 12:47:35 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Wed, 08 Feb 2006 18:47:35 +0100
Subject: 450 Pound Library Program
In-Reply-To: <1139411880.032250.181300@g43g2000cwa.googlegroups.com>
References: <1139351498.090768.82270@o13g2000cwo.googlegroups.com>
	<43e9f1e1$0$612$636a15ce@news.free.fr>
	<1139411880.032250.181300@g43g2000cwa.googlegroups.com>
Message-ID: <43ea2ed0$0$608$636a15ce@news.free.fr>

plahey at alumni.caltech.edu wrote:
> Ok,
> 
> I give up. DRY = Don't Repeat Yourself (google Pragmatic Programmers)
> but SPOT?  Google is little help here, SPOT is too common a word.

Single Point Of Truth (or Single Point Of Transformation)

And before you mention it, yes, it's *almost* the same thing as DRY !-)


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From johnjsal at NOSPAMgmail.com  Fri Feb 10 15:22:07 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 10 Feb 2006 20:22:07 GMT
Subject: installing python on a server?
Message-ID: <PB6Hf.1596$No6.37972@news.tufts.edu>

Can anyone tell me how complicated it might be to install Python on my 
server so I can use it for web apps? Is it a one-time process, or 
something to maintain?

Thanks.


From mark at mark-fink.de  Mon Feb 13 14:10:15 2006
From: mark at mark-fink.de (Mark Fink)
Date: 13 Feb 2006 11:10:15 -0800
Subject: Jython socket typecasting problems
References: <1139678202.221563.308700@f14g2000cwb.googlegroups.com>
	<456l92F554abU1@uni-berlin.de>
	<mailman.1803.1139803276.27775.python-list@python.org>
Message-ID: <1139857815.855155.58400@g43g2000cwa.googlegroups.com>

thanks to the help of this group I moved a tiny step forward. Obviously
it is not possible to resolve name localhost:
Type "copyright", "credits" or "license" for more information.
>>> import socket
>>> s=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>>> s.connect(localhost, 8080)
Traceback (innermost last):
  File "<console>", line 1, in ?
NameError: localhost
>>> s.connect((localhost, 8080))
Traceback (innermost last):
  File "<console>", line 1, in ?
NameError: localhost
>>> s.connect(('127.0.0.1', 8080))
Traceback (innermost last):
  File "<console>", line 1, in ?
  File "D:\AUT_TEST\Jython21\Lib\socket.py", line 135, in connect
java.net.ConnectException: Connection refused: connect
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
        at
java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
        at java.net.Socket.connect(Socket.java:507)

Unfortunately this is not the solution (I tried 127.0.0.1 before my
first post).
I added the two print lines as recommended:
        self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        print type(self.host), repr(self.host)
        print type(self.port), repr(self.port)
        self.socket.connect((self.host, self.port))
        self.socketOutput = self.socket.getOutputStream()

And more specific information:
D:\AUT_TEST\workspace\JyFIT\fit>jython JyFitServer2.py 127.0.0.1 1234
12
['JyFitServer2.py', '127.0.0.1', '1234', '12']
127.0.0.1
org.python.core.PyString '127.0.0.1'
org.python.core.PyString '1234'
Traceback (innermost last):
  File "JyFitServer2.py", line 148, in ?
  File "JyFitServer2.py", line 31, in run
  File "JyFitServer2.py", line 98, in establishConnection
  File "D:\AUT_TEST\Jython21\Lib\socket.py", line 135, in connect
TypeError: java.net.Socket(): 1st arg can't be coerced to
java.net.InetAddress or String

No casting from string to string?? I learned that there is no such
thing as explicit typecasting. What to do?



From rabkin at mweb[DOT]co[DOT]za  Sat Feb 18 08:13:06 2006
From: rabkin at mweb[DOT]co[DOT]za (Max)
Date: Sat, 18 Feb 2006 15:13:06 +0200
Subject: Should we still be learning this?
In-Reply-To: <mailman.2092.1140267087.27775.python-list@python.org>
References: <xuGdnQRiLabDiGrenZ2dnUVZ_tWdnZ2d@is.co.za>
	<mailman.2092.1140267087.27775.python-list@python.org>
Message-ID: <veednZB1zsf4gGrenZ2dnUVZ_s-dnZ2d@is.co.za>

Felipe Almeida Lessa wrote:
> Em S?b, 2006-02-18 ?s 14:38 +0200, Max escreveu:
> 
> Urgh. This sucks. Did they mention generators, at least? Sometimes list
> comprehensions are even faster (I didn't check, but I think this one can
> be an example of this: [i*2+2 for i in iterator] vs. map(lambda x: x*2
> +2, iterator)).
> 

No mention of generators in the outline.

> They should have taught both.
> 
> 
>>What do you think?
> 
> 
> I wonder if they need some updating.
> 

And so does Dive Into Python (our textbook, diveintopython.org) which 
has the same deficiencies in its outline.

> 
> Just my two cents,
> Felipe.
> 

Thanks,
Max


From removethis.kartic.krishnamurthy at gmail.com  Tue Feb 14 20:56:29 2006
From: removethis.kartic.krishnamurthy at gmail.com (Kartic)
Date: Wed, 15 Feb 2006 01:56:29 GMT
Subject: html source
In-Reply-To: <mailman.1866.1139867637.27775.python-list@python.org>
References: <20060213194631.10759.qmail@web36512.mail.mud.yahoo.com>
	<mailman.1866.1139867637.27775.python-list@python.org>
Message-ID: <hTvIf.56795$PL5.18822@newssvr11.news.prodigy.com>

Hi Steve (Young),

Here is my take. It is possible that the web page you are accessing 
dynamically generates the page using the user-agent.

The user-agent when used from urllib2 will be set to Python-urllib/x.x. 
If the page were generated dynamically, this would go into the "else" 
part (of the page-generation logic) and yield a page without all the 
fancy scripts.

Why don't you try setting the user-agent to same as the browser you are 
using and see if you get the same HTML source this time.

Refer http://diveintopython.org/http_web_services/user_agent.html on 
setting the user-agent.

Thanks,
--Kartic

The Great 'Steve Holden' uttered these words on 2/13/2006 4:53 PM:
> Steve Young wrote:
> 
>> Hi, I was wondering why when I use urllib2.build_opener().open(url), 
>> it doesn't give me the same thing as if I would just click on view--> 
>> source on my web browser. It gives me most of html on the page but 
>> leaves out lots of scripts and some of the link's urls are truncated. 
>> Is there something out there in python that gives me EXACTALLY the 
>> same thing as if you were to just do view-->source on the web browser? 
>> Thanks for the help.
>>
> If this observation is truly correct it should qualify as a bug. Can you 
> give us a URL and some code which demonstrate your assertion?
> 
> regards
>  Steve


From gregory.petrosyan at gmail.com  Thu Feb 23 08:19:14 2006
From: gregory.petrosyan at gmail.com (Gregory Petrosyan)
Date: 23 Feb 2006 05:19:14 -0800
Subject: What's up with this code?
In-Reply-To: <1140699277.658249.280130@u72g2000cwu.googlegroups.com>
References: <1140649331.924736.128420@g43g2000cwa.googlegroups.com>
	<43fd08cf$1@nntp0.pdx.net>
	<1140699277.658249.280130@u72g2000cwu.googlegroups.com>
Message-ID: <1140700754.171942.70530@o13g2000cwo.googlegroups.com>

Oh, by the way, is there any documentation about time of execution of
standart functions (is len(list) O(1) or O(n), etc) and is there any C
version of decimal?



From deusfaber at gmail.com  Sun Feb 12 16:41:00 2006
From: deusfaber at gmail.com (dfaber)
Date: 12 Feb 2006 13:41:00 -0800
Subject: python and webcam
In-Reply-To: <mailman.1795.1139778837.27775.python-list@python.org>
References: <1139773485.698970.195320@z14g2000cwz.googlegroups.com>
	<mailman.1795.1139778837.27775.python-list@python.org>
Message-ID: <1139780460.804865.59010@f14g2000cwb.googlegroups.com>

Hi again,
 I've tried a the Sane interface from PIL and I get the following
error, when I run the demo_pil.py from the Sane directory.
------------------------------------------------------------
SANE version: (16777231, 1, 0, 15)
Available devices= [('v4l:/dev/video0', 'Noname', 'Logitech QuickCam
Pro 3000', 'virtual device')]
Traceback (most recent call last):
  File "/PyWebcam/demo_pil.py", line 17, in ?
    s.br_x=320. ; s.br_y=240.
  File "/usr/lib/python2.4/site-packages/sane.py", line 150, in
__setattr__
    raise AttributeError, 'Inactive option: '+key
AttributeError: Inactive option: br_x
------------------------------------------------------------

Next, I looked at v4l support for python with absolutely no
documentation. I tried to build the modules and I get the following
error:
------------------------------------------------------------
 python setup.py build
running build
running build_ext
building 'v4l' extension
gcc -pthread -fno-strict-aliasing -DNDEBUG -O2 -g -pipe
-Wp,-D_FORTIFY_SOURCE=2 -fexceptions -m32 -march=i386 -mtune=pentium4
-fasynchronous-unwind-tables -D_GN U_SOURCE -fPIC -fPIC
-I/usr/include/python2.4 -c v4l.c -o build/temp.linux-i686- 2.4/v4l.o
v4l.c: In function 'v4l_getImage':
v4l.c:890: warning: pointer targets in assignment differ in signedness
v4l.c: In function 'initv4l':
v4l.c:1585: error: 'VIDEO_AUDIO_BALANCE' undeclared (first use in
this function)
v4l.c:1585: error: (Each undeclared identifier is reported only once
v4l.c:1585: error: for each function it appears in.)
error: command 'gcc' failed with exit status 1
------------------------------------------------------------

I also looked at libfg http://antonym.org/libfg and I get the following
errors again:
-------------------------------
python setup.py build
running build
running build_ext
building 'fg' extension
gcc -pthread -shared build/temp.linux-i686-2.4/fgmodule.o -L. -lfg -o
build/lib.linux-i686-2.4/fg.so
/usr/bin/ld: cannot find -lfg
collect2: ld returned 1 exit status
error: command 'gcc' failed with exit status 1

I google-ed extensively have so far found only these three packages.
Any ideas why I get these error messages?



From bradfordh at gmail.com  Wed Feb 15 14:13:08 2006
From: bradfordh at gmail.com (Tempo)
Date: 15 Feb 2006 11:13:08 -0800
Subject: Python, Forms, Databases
Message-ID: <1140030788.083799.45060@f14g2000cwb.googlegroups.com>

I have been looking around for a few days for ways to use Python with
HTML forms. What I am interested in doing is placing the data that is
submited through an HTML form and collected by Python into a MySQL
database. I initially thought that I was going to be able to do this
with ASP, but I found out that my web hosting provider doesn't have ASP
support installed into their servers. Also, I couldn't find any dirt
cheap hosting providers that did support Pyton and ASP together. The
next solution I stumbled upon was to use Zope. However, I wasn't sure
if I should spend more of my time looking into this or not, and I found
a possible way around this, which is by using the CGI module. As you
can see, I am somewhat new to Python web programming and I have
confused myself. Can anybody name a few modules that I should look into
and these modules are the ones that will allow me to accomplish what I
am interested in doing? Thanks for your help.



From a.schmolck at gmail.com  Sun Feb 19 14:26:20 2006
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: 19 Feb 2006 19:26:20 +0000
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
Message-ID: <yfsmzgnp2ub.fsf@oc.ex.ac.uk>

Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> writes:

> DH a ?crit :
> (snip)
> > It is by design. Python is dynamically typed. It is essentially an
> > interpreted scripting language like javascript or ruby or perl,
> 
> 
> It's not a "scripting" language, and it's not interpreted.

Of course it is. What do you think happens to the bytecode? And if python
isn't a scripting language, then what on earth is? 

You might want to argue about whether scriping language is a meaningful and
useful concept, but it's really hard to see how you could talk about "scripting
languages" without including python.

'as


From siona at chiark.greenend.org.uk  Fri Feb 10 13:03:32 2006
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 10 Feb 2006 18:03:32 +0000 (GMT)
Subject: Newbie Q: dynamically assigning object attribute
References: <1139535715.486234.195690@g44g2000cwa.googlegroups.com>
Message-ID: <mqh*DvZ+q@news.chiark.greenend.org.uk>

Ben Wilson <dausha at gmail.com> wrote:
>I would like to dynamically assign object attributes:
>
>dict = {
> a : 1,
> b : 2,
>}
>
>for key,val in dict :
>  obj.key = val
>
>I've googled to no effect, or maybe I'm needing to be hit with the
>appropriately sized clue-by-four.

The conventional clue-by-four applied to this question is "Don't
do that: just put the dictionary (or a copy of it) in the object
with obj.d = d (and don't shadow the built-in dict while you're
at it)." Having spent significant portions of the last two days
coping with the mess of adding functionality to a class written
by someone who thought doing what you want to do was a Good Idea,
I can only concur with that conventional wisdom.

Really. Don't do it. (Unless you have a damn good reason. In
which case, you've already been pointed at setattr().)

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From johnjsal at NOSPAMgmail.com  Wed Feb 22 11:22:03 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 22 Feb 2006 16:22:03 GMT
Subject: a little more help with python server-side scripting
In-Reply-To: <59edncmGm6g2LmbeRVn-pw@rcn.net>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
Message-ID: <Lc0Lf.1652$No6.38850@news.tufts.edu>

John Salerno wrote:
> I contacted my domain host about how Python is implemented on their 
> server, and got this response:

Uh, okay, I asked a related question to them and now I got this:

------------
Hello John,

There are some corrections based on last reply.

The python installation on our windows hosting is not configured as 
mod_python. Howevet, it is directly map with a website extensions 
mapping in IIS. Save your python script as .py file on the wwwroot and 
you may call the scripts using http://www.yourdomain.com/yourfile.py

If you have any enquiries, please do not hesitate to contact.

Best regards,

Mackenzie S.
Support Executive
-----------

Does that really change anything?

What I had asked was if I could just embed Python code within my HTML 
files, like you do with PHP, but they didn't address that yet.


From grante at visi.com  Tue Feb  7 13:06:43 2006
From: grante at visi.com (Grant Edwards)
Date: Tue, 07 Feb 2006 18:06:43 -0000
Subject: Best way of finding terminal width/height?
References: <96nFf.43896$d5.199922@newsb.telia.net>
	<11uc3dohfitotc5@corp.supernews.com>
	<jysFf.155352$dP1.513537@newsc.telia.net>
	<11udc0r2bq11042@corp.supernews.com> <43E719EE.3040401@gmail.com>
	<11ueq4nhn91qm91@corp.supernews.com> <43E8659D.6010101@gmail.com>
	<11uhcjj2p10mm0d@corp.supernews.com> <43E8D4DD.7040904@gmail.com>
Message-ID: <11uhodjciifej02@corp.supernews.com>

On 2006-02-07, Joel Hedlund <joel.hedlund at gmail.com> wrote:

>> You just call the failed read() or write() again.  Unless
>> there's some way that the read/write partially succeeded and
>> you don't have any way to know how many bytes were
>> read/written, If that's the case then Python's "file" object
>> read and write would appear to be broken by design.
>
> Wow... I tried to set up an example that would fail, and it
> didn't. It seems the test only fails if I use the keyboard to
> cram stuff into stdin, and not if stdin is a regular pipe. 

That's what I'd expect.  Resizing the terminal should have no
effect on read() calls that are pending on other things.

> Could this perhaps be some kind of misbehavior on behalf of my
> terminal emulator (GNOME Terminal 2.12.0 in Ubuntulinux 5.10)?

Nope.  Resign the terminal will abort pending I/O operations on
that terminal.  It won't terminal I/O operations pending on
other devices/files.

> Then run the prog and pipe a large chunk of text into stdin, and redirect stdout to a file:
>
> $ cat /a/large/text/file | python winch.py > copy.of.the.large.file
>
> Now, what happens for me is exactly what I wanted. I can
> resize the window as much as I like, and a diff 

Sure.

> $ diff /a/large/text/file copy.of.the.large.file
>
> comes up empty. A perfectly good copy.
>
> However, if I do this instead (try to use keyboard to push stuff into stdin):
>
> $ python winch.py > copy.of.the.large.file
>
> I expect python not to return until I press Ctrl-D on my
> keyboard,

sys.stdin.read() will return when there's an EOF or when the
underyling read() call is aborted by a signal.

> but it does return as soon as I enter more than one
> line of text and then resize the window (one unterminated line
> is ok). 
>
> Example text to type in:
> moo moo
> cow cow
>
> As soon as I have typed in something that includes a newline
> charater through the keyboard and try to resize the terminal,
> sys.stdin.read() will return whatever I put in no far and no
> exception raised.

Yup.  That does indeed appear to be the way it works. :)

> Weird. Could it in fact my terminal that's screwing things up
> for me?

No.

Try this out:

----------------------------------------------------------------------
#!/usr/bin/python
import signal, os, sys

_bTerminalSizeChanged = False

def report_terminal_size_change(signum, frame):
    global _bTerminalSizeChanged
    _bTerminalSizeChanged = True

signal.signal(signal.SIGWINCH, report_terminal_size_change)

while True:
    try:
        s = sys.stdin.read()
        if not s:
            break
        sys.stdout.write(s)
    except IOError:
        sys.stderr.write("IOError\n")
    if _bTerminalSizeChanged:
        sys.stderr.write("SIGWINCH recevied\n")
        _bTerminalSizeChanged = False
----------------------------------------------------------------------

In that example, I handle IOError on write with the same
exception handler as the one for read.  That may not be exactly
what you want to do, but it does demonstrate what
window-resizing does.

When the window is resized, the SIGWINCH handler will be
called.  A pending read() may abort with an IOError, or it may
just return some buffered data.

-- 
Grant Edwards                   grante             Yow!  Send your questions
                                  at               to "ASK ZIPPY", Box 40474,
                               visi.com            San Francisco, CA 94140,
                                                   USA


From xavier.morel at masklinn.net  Wed Feb 15 15:12:14 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Wed, 15 Feb 2006 21:12:14 +0100
Subject: Python, Forms, Databases
In-Reply-To: <1140032343.627599.217590@g14g2000cwa.googlegroups.com>
References: <1140030788.083799.45060@f14g2000cwb.googlegroups.com>
	<xoOdnSSGbYRFHW7eRVn-og@comcast.com>
	<1140032343.627599.217590@g14g2000cwa.googlegroups.com>
Message-ID: <dt01n4$d8k$1@apollon.grec.isp.9tel.net>

Tempo wrote:
> Larry I do see your point. There does seem to be a lot more support for
> PHP and MySQL together than there is Python and ASP. But I want to
> first try to accomplish my goal by using Python first before I give up
> and revert back to PHP. So if I was going to parse HTML forms and place
> the data into a MySQL database, what should I use? CGI module? Zope?
> Webware? Thanks for any and all help.
> 
If you're talking about a pair of page and nothing more, the CGI module 
and manually handling your stuff (with a DBAPI2 MySQL module for the DB 
link) is more than enough.

If you want to create something more complex (a full database driven 
website), it would probably be a good idea to check some of Python's web 
frameworks, Django for example.


From edreamleo at charter.net  Fri Feb 24 09:12:58 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Fri, 24 Feb 2006 08:12:58 -0600
Subject: How to tell an object's class?
Message-ID: <gwELf.15$SF4.1@fe02.lga>

 Hi,



I would like to create a dictionary of all the classes that exist while my 
app is running.  This is the best I can do:



def defineClassesDict (self):



    self.allClassesDict = {}



    for z in gc.get_objects():

        t = type(z)

        if t == types.ClassType:

            name = z.__name__

        elif t == types.InstanceType:

            name = z.__class__.__name__

        elif repr(t).startswith('<class'): # A wretched kludge.

            name = z.__class__.__name__

        elif t == types.TypeType:

            name =z.__name__

        else:

            name = None

        if name:

            self.allClassesDict [name] = z



This works, but it relies on a wretched (and slow) kludge, namely the test:



repr(t).startswith('<class')



There seems to be a hole in the types module.  Can anyone suggest a better 
approach?  Thanks.



Edward
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------




From timr at probo.com  Wed Feb  1 02:57:50 2006
From: timr at probo.com (Tim Roberts)
Date: Wed, 01 Feb 2006 07:57:50 GMT
Subject: HTML parsing bug?
References: <1138632328.306349.241430@g44g2000cwa.googlegroups.com>
	<1138633701.862513.326770@f14g2000cwb.googlegroups.com>
Message-ID: <ccq0u1dcrjmtlmh6ao3rcpb9sg7l9fgdla@4ax.com>

"Istvan Albert" <istvan.albert at gmail.com> wrote:
>
>> this is a comment in JavaScript, which is itself inside an HTML comment
>
>Don't nest HTML comments. Occasionaly it may break the browsers as
>well.

Did you read the post?  He didn't nest HTML comments.  He put a Javascript
comment inside an HTML comment, inside a <script></script> pair.  Virtually
every page with Javascript does exactly the same thing.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From fuzzyman at gmail.com  Thu Feb  2 08:38:49 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 2 Feb 2006 05:38:49 -0800
Subject: cgi - secure sessions
In-Reply-To: <1138887222.504350.209200@z14g2000cwz.googlegroups.com>
References: <1138842390.012855.107610@g44g2000cwa.googlegroups.com>
	<7x8xsuczxz.fsf@ruckus.brouhaha.com>
	<1138844380.094365.223840@g44g2000cwa.googlegroups.com>
	<1138871331.983318.58170@f14g2000cwb.googlegroups.com>
	<1138887222.504350.209200@z14g2000cwz.googlegroups.com>
Message-ID: <1138887529.554523.228360@z14g2000cwz.googlegroups.com>


GazaM wrote:
> Ok, thanks for all the help guys. It seems that running this type of
> script from inside of the html just isn't going to work as needed.
> Seems like I'll just have to ditch the .shtml and point directly to a
> cgi. This is how the other Python frameworks and sites work, such as
> reddit and plone etc right?

That's more normal. logintools has templates in a directory and outputs
pages based on those. That's what all the 'tempalting engine'
discussion going on at the moment is about.

On the other hand, you can have static html pages with forms that call
the CGI. The CGI will still have to return HTML though.

logintools itself uses an *ultra simple* templating system - just
replacing special values in the template with the dynamically generated
values. There is no logic in the templates whatsoever.

All the best,


Fuzzyman
http://www.voidspace.org.uk/python/index.shtml



From daftspaniel at gmail.com  Sun Feb  5 16:27:51 2006
From: daftspaniel at gmail.com (daftspaniel at gmail.com)
Date: 5 Feb 2006 13:27:51 -0800
Subject: Most prominent Tkinter applications?
In-Reply-To: <43e666e0$2@news.uni-ulm.de>
References: <a24fa$43e64a39$4275d90a$26634@FUSE.NET>
	<43e666e0$2@news.uni-ulm.de>
Message-ID: <1139174871.954089.321970@g14g2000cwa.googlegroups.com>

I use this TKinter app almost everyday. Great simple GUI and looks good
too.

http://www.podblogger.de/mp3stick

Take care,
Davy Mitchell

Mood News
 - BBC News Headlines Auto-Classified as   Good,   Bad or   Neutral.
 http://www.latedecember.com/sites/moodnews/



From aleaxit at yahoo.com  Sat Feb 11 11:39:30 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sat, 11 Feb 2006 08:39:30 -0800
Subject: is there a better way?
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
	<1hakfjo.j6t8d31cslz6tN%aleaxit@yahoo.com>
	<aYidnQk9BPTadnDeRVn-pQ@comcast.com>
Message-ID: <1hal34r.1bzilxyr3wixqN%aleaxit@yahoo.com>

Charles Krug <cdkrug at aol.com> wrote:

> On 2006-02-11, Alex Martelli <aleaxit at yahoo.com> wrote:
> > markscala at gmail.com <markscala at gmail.com> wrote:
> >
> >> Problem:
> >> 
> >> You have a list of unknown length, such as this: list =
> >> [X,X,X,O,O,O,O].  You want to extract all and only the X's.  You know
> >> the X's are all up front and you know that the item after the last X is
> >> an O, or that the list ends with an X.  There are never O's between
> >> X's.
> >
> > If the list is incredibly long, you should use a bisection approach.
> > Standard module bisect in the Python library could help, but mostly as
> > an _example_, since it unfortunately relies on normal alphabetic order,
> > and alphabetically speaking X should come _after_ O, not _before_.
> 
> Isn't every call to list.index() an O(n) operation?  We certainly want
> to avoid multiple calls there if we can.

Why should we have ANY call to index whatsoever?

> What happens if your split occurs in the middle of your block of Xs?
> Then the split before/after fails --the stated algorithm says, "If the
> split is an X, choose the front half," so perhaps the statement was
> inprecise?

What statement?  What are you TALKING about?!  What I said, and you
don't quote, was:

> > 2. if it's an X, so are all previous items -- recurse to second half

how can you POSSIBLY read this as "choose the front half"?!  I say to
recurse (iteration works, too, but it's even trickier to code) to the
SECOND half, to find the first-if-any non-'X'.

> The only way you'll know if you have an X in a particular block is using
> a linear search method, either in Python or with list.index()

Reread markscala's problem statement: all the Xs are up front followed
by 0 or more Os.  So, the list is L = ['X']*N + ['O']*M for unknown N>=0
and M>=0.  All we have to do is find N and M (if we know either, the
other is immediately computed, since N+M==len(L) and len() is O(1)).

> If (as the OP seemed to state) we KNOW that there's only one block of
> X's in the list:
> 
> 1. Find the index of the first X

Why would we do that?  He stated, very clearly, and you and I have both
been quoting:

> >> You know
> >> the X's are all up front 

So why would we do any work to find out what we altrady know?

> 2. Find the index of the last X.

Yep, the only certain task, and it's O(log(N+M)).

> 3. Delete the block we've found.

And the deletion is definitely linear time (and trivial), of course.  I
was focusing on the only interesting part, (2).

> Judging from way the OP worded the question, I'd advise making something
> that works and that you understand how it works.
> 
> After that, s/he can worry about whether or not its performance is
> suboptimal.

And indeed, part of what I said (and again you're snipping it rather
than quoting it was:

> > If N is not too huge, O(N) might be OK, and is, of course, way simpler
> > to code!-)

However, even though the O(N) in the deletion subtask would appear to
justify this shortcut, I think the task is way too trivial to justify a
linear-time approach to point 2 -- the obvious N = L.count('X'), of
course.  It seems likely that the whole purpose of the exercise
(probably homework) is to have the student identify and develop a
bisection (a notoriously tricky-to-code thing).


Alex


From paul at boddie.org.uk  Tue Feb 21 11:30:04 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 21 Feb 2006 08:30:04 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com>
	<mailman.2160.1140440898.27775.python-list@python.org>
	<1140454473.335788@jetspin.drizzle.com>
	<pan.2006.02.20.21.59.12.636908@REMOVETHIScyber.com.au>
	<1140490302.639049@jetspin.drizzle.com>
	<mailman.2231.1140532613.27775.python-list@python.org>
Message-ID: <1140539404.440390.172350@g44g2000cwa.googlegroups.com>

Chris Mellon wrote:
>
> You're correct as far as it goes, but can you provide a reasonable
> definition for "interpreted" that matches the common usage? Most
> people can't.

I thought Torsten's definition was good enough: if the instructions
typically produced when preparing your programs for execution can be
handled directly by the CPU then let's call it a "compiled language";
otherwise, let's call it an "interpreted language". I think we all know
about the subtleties of different levels of virtual machines, but if
you want an arbitrary definition that lots of people feel is intuitive
then that's the one to go for.

> When asked to name some interpreted (or scripting) languages, they'll
> name some off - perl, python, ruby, javascript, basic...

Right: compiled Perl and Python instructions typically aren't executed
directly by the hardware; Ruby visits the parse tree when executing
programs (see [1] for some casual usage of "interpreted" and "compiled"
terms in this context), although other virtual machines exist [2];
JavaScript varies substantially, but I'd imagine that a lot of the
implementations also do some kind of parse tree walking (or that the
developers don't feel like documenting their bytecodes), although you
can also compile JavaScript to Java class files [3]; BASIC varies too
much for any kind of useful summary here, but I'd imagine that early
implementations have tainted the language's "compiled" reputation
substantially.

> They won't say Java. Ask them why Python is interpreted and Java isn't
> and you'll have a hard time getting a decent technical answer, because
> Python isn't all that different from Java in that regard, especially
> pre-JIT versions of Java.

That's why I put Java and Python in the same category elsewhere in this
thread. Bear in mind, though, that Java's just-in-time compilation
features were hyped extensively, and I imagine that many or most
implementations have some kind of native code generation support,
either just-in-time or ahead-of-time.

> Probably the most accurate definition of "interpreted" as it is used
> in the wild is "one of these languages: perl, python, perl, ruby,
> etc". That is, you're essentially claiming that Python is interpreted
> because everyone thinks of it that way, technical correctness be
> damned.

Well, I think Torsten's definition was more objective and yet arrives
at the same result. Whether we're happy with that result, I have my
doubts. ;-)

> There is an obvious difference between Python and C. Nobody would deny
> that. But it's a fairly hard thing to *quantify*, which is why people
> make sloppy categorizations. That's not a problem as long as there
> isn't prejudice associated with the categorization, which there is.

I refer you again to Torsten's definition.

> I wonder how "interpreted" people would think Python is if the
> automagic compilation to .pyc was removed and you had to call
> "pythonc" first.

Well, such things might have a psychological impact, but consider
removing Python's interactive mode in order to enhance Python's
non-interpreted reputation, and then consider Perl (an interpreted
language according to the now-overly-referenced definition) which
doesn't have an interactive mode (according to [4] - I don't keep up
with Perl matters, myself), but which allows expression evaluation at
run-time. No-one would put Perl together with C in a compiled vs.
interpreted categorisation. Removing the automatic compilation support
might strengthen the compiled feel of the both languages further, but
with knowledge of the technologies employed, both languages (at least
in their mainstream forms) are still on the other side of the fence
from C.

Paul

[1] http://www.rubygarden.org/faq/entry/show/126
[2] http://www.atdot.net/yarv/
[3] http://www.mozilla.org/rhino/doc.html
[4] http://dev.perl.org/perl6/rfc/184.html



From fuzzyman at gmail.com  Mon Feb 13 05:34:49 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 13 Feb 2006 02:34:49 -0800
Subject: Downloading Large Files -- Feedback?
In-Reply-To: <1139773494.245577.102870@g47g2000cwa.googlegroups.com>
References: <1139773494.245577.102870@g47g2000cwa.googlegroups.com>
Message-ID: <1139826889.161164.190570@g44g2000cwa.googlegroups.com>


mwt wrote:
> This code works fine to download files from the web and write them to
> the local drive:
>
> import urllib
> f =  urllib.urlopen("http://www.python.org/blah/blah.zip")
> g = f.read()
> file = open("blah.zip", "wb")
> file.write(g)
> file.close()
>
> The process is pretty opaque, however. This downloads and writes the
> file with no feedback whatsoever. You don't see how many bytes you've
> downloaded already, etc. Especially the "g = f.read()" step just sits
> there while downloading a large file, presenting a pregnant, blinking
> cursor.
>
> So my question is, what is a good way to go about coding this kind of
> basic feedback? Also, since my testing has only *worked* with this
> code, I'm curious if it will throw a visibile error if something goes
> wrong with the download.
>

By the way, you can achieve what you want with urllib2, you may also
want to check out the pycurl library - which is a Python interface to a
very good C library called curl.

With urllib2 you don't *have* to read the whole thing in one go -

import urllib2
f =  urllib2.urlopen("http://www.python.org/blah/blah.zip")
g = ''
while True:
  a = f.read(1024*10)
  if not a:
    break
  print 'Read another 10k'
  g += a

file = open("blah.zip", "wb")
file.write(g)
file.close()

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml
> Thanks for any pointers. I'm busily Googling away.



From mfranklin1 at gatwick.westerngeco.slb.com  Thu Feb 23 12:41:47 2006
From: mfranklin1 at gatwick.westerngeco.slb.com (Martin Franklin)
Date: Thu, 23 Feb 2006 17:41:47 +0000
Subject: regular expresson for Unix and Dos Lineendings wanted
In-Reply-To: <ujgrv19d4thh28cvh4emqi2m1p5g1gofuh@4ax.com>
References: <jterv157550g4qd4rosc3a2o8l69gcau8v@4ax.com>
	<mailman.2346.1140703308.27775.python-list@python.org>
	<ujgrv19d4thh28cvh4emqi2m1p5g1gofuh@4ax.com>
Message-ID: <43FDF3DB.4090704@gatwick.westerngeco.slb.com>

Franz Steinhaeusler wrote:
> On Thu, 23 Feb 2006 13:54:50 +0000, Martin Franklin
> <mfranklin1 at gatwick.westerngeco.slb.com> wrote:
> 
>>>>>> r="erewr    \r\nafjdskl     "
>>> 'erewr    \r\nafjdskl'
>>>
>>> 2) Unix
>>>>>> r="erewr    \nafjdskl     "
>>> 'erewr\nafjdskl'
>> why not use string methods strip, rstrip and lstrip
>>
> 
> because this removes only the last spaces,
>>>> r
> 'erewr    \r\nafjdskl     '
>>>> r.rstrip()
> 'erewr    \r\nafjdskl'
> 
> I want:
> 'erewr\r\nafjdskl'
> 
> or for unix line endings
> 'erewr\nafjdskl'
> 


how about one of these variations

print 'erewr    \r\nafjdskl     '.replace(" ", "")
print 'erewr    \r\nafjdskl     '.strip(" \t")





From fredrik at pythonware.com  Sun Feb 19 08:51:16 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 19 Feb 2006 14:51:16 +0100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com><1140338593.555029.63860@g43g2000cwa.googlegroups.com>
	<roy-F93C16.08223719022006@reader2.panix.com>
Message-ID: <dt9t4n$7af$1@sea.gmane.org>

Roy Smith wrote:

> I dread the day that competing Python implementations spring up.

where were you in 1997?

http://www.python.org/workshops/1997-10/proceedings/hugunin.html

</F>





From rtilley at vt.edu  Tue Feb 14 22:55:11 2006
From: rtilley at vt.edu (rtilley)
Date: Tue, 14 Feb 2006 22:55:11 -0500
Subject: How to cat None
In-Reply-To: <59xIf.16847$CZ4.13956@trnddc05>
References: <59xIf.16847$CZ4.13956@trnddc05>
Message-ID: <dsu8lh$6q8$1@solaris.cc.vt.edu>

LittlePython wrote:
I am not too sure I know what None really means.

It means null, void or lack of value. It is not an empty string. You 
can't add None to stings.

 >>> r = None
 >>> print r
None
 >>> print type(r)
<type 'NoneType'>


From robert.h.boyd at gmail.com  Fri Feb 24 13:01:26 2006
From: robert.h.boyd at gmail.com (Robert Boyd)
Date: Fri, 24 Feb 2006 13:01:26 -0500
Subject: editor for Python on Linux
In-Reply-To: <dtai6e$23m$2@ariane.blic.net>
References: <dtai6e$23m$2@ariane.blic.net>
Message-ID: <e9e3813b0602241001s150e3395le5a782b575ec9c56@mail.gmail.com>

On 2/19/06, Mladen Adamovic <adamm_n0 at spamm_blic.net> wrote:
> Hi!
>
> I wonder which editor or IDE you can recommend me for writing Python
> programs. I tried with jEdit but it isn't perfect.
>

I know you said in the thread that you had problems with jEdit for
Python, and didn't care for Emacs or Vi(m).

Still -- in my experience, I've used jEdit for Python for about the
past 5 years, and never had a problem with jEdit's indentation. I did
not set up as a full-fledged IDE with code completion or module
browsing -- I never got the jpydebug plugin working to my
satisfaction. I think jEdit is an excellent editor.

I've tried pretty much all of the well-known editor/IDE options.
Komodo is nice to work with, but expensive (I code for pay, so can't
use the cheap license) compared to even WingIDE. Also, I don't like
the Komodo module browser. The latest pydev for Eclipse is greatly
improved. But with Eclipse you get all the overhead of a
projects-requiring IDE, which may feel like overkill if you're writing
small scripts. Plus, for the Python stuff to work, you have to import
files into a project that's defined as a Python project (not true for
the other full-blown IDEs). For fast and small (opposite of Eclipse),
Scite is nice, but auto-completion can only use words that exist in
the opened file, not the available methods in your namespace.

Despite all the good choices, I have gone back to my old standby, Vim,
alongside IPython.  If you dislike the vim way of editing, there's a
user-friendlier version of Vim called Cream. With vim plus IPython,
you get syntax highlighting, auto-indent, code completion, code
browser (tags), interactive help, ability to run your code and drop
into a debugger, file explorer, etc (and I haven't even gotten all the
vim Python tools installed yet). Add winpdg if you like a more GUI
debugger, and you've got the makings of a great development
environment.

If you really _have_ to have a full-blown IDE with a modern-looking
GUI, with dockable windows and all that, try the Komodo and WingIDE
trials. If you aren't coding for a living, you might want to pay the
price for a non-professional license. Try Eclipse with pydev, too. But
for your intended purpose, you might decide you can use a
lighter-weight setup.

From jstroud at ucla.edu  Thu Feb  9 15:59:06 2006
From: jstroud at ucla.edu (James Stroud)
Date: Thu, 09 Feb 2006 12:59:06 -0800
Subject: New editions of several Python books.
In-Reply-To: <dsfplv$ptp$1@wake.carmen.se>
References: <dsfplv$ptp$1@wake.carmen.se>
Message-ID: <dsgaeq$rnq$1@daisy.noc.ucla.edu>

Magnus Lycka wrote:
> Programming Python, 3rd edition
> by Mark Lutz (Paperback - July 2006)
> 
> Never a favourite of mine really, but a popular book...

This one is like broccoli. Its good for you but it doesn't have much flavor.


From johnjsal at NOSPAMgmail.com  Tue Feb 21 19:42:21 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 21 Feb 2006 19:42:21 -0500
Subject: a little more help with python server-side scripting
Message-ID: <59edncmGm6g2LmbeRVn-pw@rcn.net>

I contacted my domain host about how Python is implemented on their 
server, and got this response:

-------------------
Hello John,

Please be informed that the implementation of python in our server is 
through mod_python integration with the apache.

These are the steps needed for you to be able to run .py script directly 
from browser for your webpage:

1. Please use the below mentioned path for python:
#!/usr/bin/env python

Furthermore, update us with the script path, so that we can set the 
appropriate ownership and permissions of the script on the server.

If you require any further assistance, feel free to contact us.
-----------------------

Unfortunately, I don't completely understand what it is I need to do 
now. Where do I put the path they mentioned? And what do they mean by my 
script path?


From kay.schluehr at gmx.net  Fri Feb 24 14:30:12 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 24 Feb 2006 11:30:12 -0800
Subject: A C-like if statement
In-Reply-To: <dtl04p$5q2$1@reader2.panix.com>
References: <hp-dnY20cusOnGPeRVn-rg@nmt.edu><dtl04p$5q2$1@reader2.panix.com>
Message-ID: <1140809412.375118.291480@u72g2000cwu.googlegroups.com>


Roy Smith wrote:
> Bob Greschke <bob at passcal.nmt.edu> wrote:
> >I miss being able to do something like this in Python
> >
> >1f (I = a.find("3")) != -1:
> >    print "It's here: ", I
> >else:
> >    print "No 3's here"
> >
> >where I gets assigned the index returned by find() AND the if statement gets
> >to do its job in the same line.  Then you don't have to have another like
> >that specifically gets the index of the "3".  Is there a way to do this in
> >Python?
>
> It is a deliberate and fundamental design decision in Python that
> assignment is a statement, not an expression with side effects.  This
> means you often need an "extra" line compared to a classic C "assign
> and test" idiom such as you have above.  I, like you, often miss the
> compactness of the C idiom, but there it is.

Hmm. A statement has side-effects but it returns no value. And yes, you
can create a name within an expression producing a value in Python,
using a list/generator comprehension. The solution to Bob's problem
would look like this:

if (I for I in (a.find("3"),) ) != -1:
     print "It's here: ", I
else:
     print "No 3's here"


Kay



From donn at u.washington.edu  Thu Feb  9 13:38:30 2006
From: donn at u.washington.edu (Donn Cave)
Date: Thu, 09 Feb 2006 10:38:30 -0800
Subject: Best way of finding terminal width/height?
References: <96nFf.43896$d5.199922@newsb.telia.net>
	<11uc3dohfitotc5@corp.supernews.com>
	<jysFf.155352$dP1.513537@newsc.telia.net>
	<11udc0r2bq11042@corp.supernews.com> <43E719EE.3040401@gmail.com>
	<11ueq4nhn91qm91@corp.supernews.com> <43E8659D.6010101@gmail.com>
	<11uhcjj2p10mm0d@corp.supernews.com> <43E8D4DD.7040904@gmail.com>
	<11uhodjciifej02@corp.supernews.com>
	<dscfcv$t5i$1@news.lysator.liu.se>
	<11uk67a4ao5efe6@corp.supernews.com>
Message-ID: <donn-ED181D.10383009022006@gnus01.u.washington.edu>

In article <11uk67a4ao5efe6 at corp.supernews.com>,
 Grant Edwards <grante at visi.com> wrote:

>  2) It also says that it makes sense to continue to read a tty
>     after you get an EOF.  That's not true.  Once you get an
>     EOF on a tty, there's no point in reading it any more:
>     you'll continue to get an EOF forever.

They were probably thinking of the way the UNIX tty
driver delivers an EOF on <ctrl>D, after which of
course you can continue to read data from the same tty.

   Donn Cave, donn at u.washington.edu


From fredrik at pythonware.com  Thu Feb  9 13:35:30 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 9 Feb 2006 19:35:30 +0100
Subject: Pulling all n-sized combinations from a list
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com><mailman.1668.1139501162.27775.python-list@python.org>
	<1139509392.890581.94470@g43g2000cwa.googlegroups.com>
Message-ID: <dsg21l$a5r$1@sea.gmane.org>

mensanator at aol.com wrote:

> > It is a C extension that does permutations & combinations and is
> > about 10x faster than doing it in pure python [I'm the author].
> > It is also the 3rd result for "python combination" and 5th for
> > "python permutaiton" but every month someone posts to c.l.py asking
> > for something similar.  Go figure.
>
> Did you ever figure that some people use Windows?

Windows don't support C ?  that was a new one.

</F>





From raims at dot.com  Thu Feb 23 04:01:49 2006
From: raims at dot.com (Lawrence Oluyede)
Date: Thu, 23 Feb 2006 10:01:49 +0100
Subject: PyAtom, a Python module for creating Atom syndication feeds
References: <pan.2006.02.23.08.53.39.65246@hastings.org>
Message-ID: <87mzgicute.fsf@voodoo.myself>

"Steve R. Hastings" <steve at hastings.org> writes:

> I intend to donate this to the Python Software Foundation, so I have
> released it under the terms of the Academic Free License 2.1.
>
> You can download it from here:
>
> http://www.blarg.net/~steveha/pyatom.tar.gz
>
>
> The file includes a readme.txt file with a few notes, and pyatom.py.

Very interesting, I was looking forward to something like that in the past and
found atomixlib but it has heavy dependencies. Yours seems nicer. Anyway, you
don't follow PEP 8 guidelines and AFAIK a module must be widespread and used by
the community before can be accepted in the Python core. The same happened with
Lundh's ElementTree

Good job :)

-- 
Lawrence - http://www.oluyede.org/blog
"Anyone can freely use whatever he wants but the light at the end
of the tunnel for most of his problems is Python"


From peter at engcorp.com  Sat Feb 25 09:08:57 2006
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 25 Feb 2006 09:08:57 -0500
Subject: Multiple threaded download streams?
In-Reply-To: <46b36eFa9ocnU1@uni-berlin.de>
References: <1140867665.749334.210370@v46g2000cwv.googlegroups.com>	<1200l41lq3dgu73@corp.supernews.com>
	<46b36eFa9ocnU1@uni-berlin.de>
Message-ID: <dtpodn$qmv$2@sea.gmane.org>

Diez B. Roggisch wrote:
>>Use a separate thread for downloading.
> 
> Or the twisted select-reactor. No threads needed.

Although depending on what the GUI is like, and what platform is 
involved, one might still want at least a second thread for the reactor 
itself.

-Peter



From donald.welch at hp.com  Thu Feb  9 17:49:52 2006
From: donald.welch at hp.com (dwelch)
Date: Thu, 09 Feb 2006 14:49:52 -0800
Subject: pythonic exec* spawn*
In-Reply-To: <1139522850.559814.25190@g43g2000cwa.googlegroups.com>
References: <mailman.1686.1139521339.27775.python-list@python.org>
	<1139522850.559814.25190@g43g2000cwa.googlegroups.com>
Message-ID: <43ebc722@usenet01.boi.hp.com>

kmkz89 at gmail.com wrote:
> You could possibly pickle an object and send it, but that could be a
> bit messy...
> 
pickle it (or shelve?) and then pass the pickle/shleve filename to the 
other process as a command line parameter?

Not sure if this would work or not, but that's where I would start.

-Don


From Michael.J.Fromberger at Clothing.Dartmouth.EDU  Mon Feb 27 21:52:33 2006
From: Michael.J.Fromberger at Clothing.Dartmouth.EDU (Michael J. Fromberger)
Date: Mon, 27 Feb 2006 21:52:33 -0500
Subject: How to do an 'inner join' with dictionaries
References: <1141047580.492771.97130@z34g2000cwc.googlegroups.com>
Message-ID: <Michael.J.Fromberger-FD1894.21523327022006@localhost>

In article <1141047580.492771.97130 at z34g2000cwc.googlegroups.com>,
 cyborg4 at walla.co.il wrote:

> Let's say I have two dictionaries:
> dict1 is  1:23,  2:76,  4:56
> dict2 is  23:A, 76:B,  56:C
> 
> How do I get a dictionary that is
> 1:A, 2:B, 4:C

The following should work:

  j = dict((k, dict2[dict1[k]]) for k in dict1 if dict1[k] in dict2)

Cheers,
-M

-- 
Michael J. Fromberger             | Lecturer, Dept. of Computer Science
http://www.dartmouth.edu/~sting/  | Dartmouth College, Hanover, NH, USA


From jeff at taupro.com  Sun Feb  5 05:16:59 2006
From: jeff at taupro.com (Jeff Rush)
Date: Sun, 05 Feb 2006 04:16:59 -0600
Subject: Booksigning Party at PyCon This Year!
Message-ID: <43E5D09B.6070904@taupro.com>

Because many authors of books related to Python will be in attendance at 
PyCon, we would like to organize a book signing activity.  It seems logical 
to hold it Saturday night at the party at the Nerdbooks.com bookstore. 
Bring your own books or buy new ones in the store!

And if you're an author in attendance who would like to promote your book, 
drop an email to "jeff at taupro.com" or come forward when we call the book 
signing to order in the store.

So that the bookstore can have copies on-hand, we'd like to collect a list 
of titles you'd consider having signed.  Please edit the following wiki page 
and add your choices.  Authors, you can add your books too.

   http://us.pycon.org/TX2006/BookSigning

-Jeff



From johnjsal at NOSPAMgmail.com  Tue Feb 14 15:15:20 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 14 Feb 2006 20:15:20 GMT
Subject: installing python on a server?
In-Reply-To: <PB6Hf.1596$No6.37972@news.tufts.edu>
References: <PB6Hf.1596$No6.37972@news.tufts.edu>
Message-ID: <sTqIf.1618$No6.38183@news.tufts.edu>

John Salerno wrote:
> Can anyone tell me how complicated it might be to install Python on my 
> server so I can use it for web apps? Is it a one-time process, or 
> something to maintain?
> 
> Thanks.

As it turns out, my hosting company supports Python on their servers! I 
know I didn't see it there before, so either it was hidden or they 
somehow turned it on for me after I asked about it. Either way, this 
saves me a ton of trouble.  :)


From donn at u.washington.edu  Mon Feb  6 13:08:37 2006
From: donn at u.washington.edu (Donn Cave)
Date: Mon, 06 Feb 2006 10:08:37 -0800
Subject: how to kill a python process?
References: <1139159404.912421.251960@g43g2000cwa.googlegroups.com>
	<slrnduceiv.2t1.grahn+nntp@frailea.sa.invalid>
	<1139170910.513664.169900@o13g2000cwo.googlegroups.com>
Message-ID: <donn-68DAB5.10083706022006@gnus01.u.washington.edu>

In article <1139170910.513664.169900 at o13g2000cwo.googlegroups.com>,
 "MackS" <mackstevenson at hotmail.com> wrote:

>  I just read that on some systems perl allows you to rename the
> process by assigning to $0:
> 
> http://www.linuxquestions.org/questions/showthread.php?t=401299
> 
> Is there a way to do the same in python? My trouble is that this are
> small utilities that I start from the command line and later need to
> stop; I just find myself unable to do so with stopping all of them...

Someone has undoubtedly managed to do this, with a C module.
It isn't portable - there isn't a standard (e.g., POSIX) way
to do it - and no doubt that's one reason you won't find it in
standard Python.

If I ever needed something like that (I haven't), I guess I
would use execve() to start the process with a name other
than python.  E.g.,

   os.execve('/usr/bin/python', ['test1', '/tmp/test1'], os.environ)

   $ ps wwaux | fgrep test1
   donn       227 ...   1568  p1  S     9:30AM   0:00.19 test1 /tmp/test1

(instead of normal)

   os.execve('/usr/bin/python', ['python', '/tmp/test1'], os.environ)

You can make a cover program to do this:

   os.execve('/usr/bin/python', [sys.argv[1] + sys.argv[1:], os.environ)


   Donn Cave, donn at u.washington.edu


From diffuser78 at gmail.com  Sat Feb 11 15:49:32 2006
From: diffuser78 at gmail.com (diffuser78 at gmail.com)
Date: 11 Feb 2006 12:49:32 -0800
Subject: Is python very slow compared to C
Message-ID: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>

I have just started to learn python. Some said that its slow. Can
somebody pin point the issue.

Thans



From tzot at sil-tec.gr  Fri Feb 10 04:25:16 2006
From: tzot at sil-tec.gr (Christos Georgiou)
Date: Fri, 10 Feb 2006 11:25:16 +0200
Subject: Hi reliability files, writing,reading and maintaining
References: <Y15Gf.280109$D47.254492@fe3.news.blueyonder.co.uk>
	<mailman.1573.1139352181.27775.python-list@python.org>
	<dsbabm$o9d$1@aphrodite.grec.isp.9tel.net>
Message-ID: <4umou11egc2njcvj07deu1o04uc1c1o1af@4ax.com>

On Wed, 08 Feb 2006 00:29:16 +0100, rumours say that Xavier Morel
<xavier.morel at masklinn.net> might have written:

>You can also nest Raid arrays, the most common nesting are Raid 01 
>(creating Raid1 arrays of Raid0 arrays), Raid 10 (creating Raid0 arrays 
>of Raid1 arrays), Raid 50 (Raid0 array of Raid5 arrays), and the "Raids 
>for Paranoids", Raid 15 and Raid 51 arrays (creatung a Raid5 array of 
>Raid1 arrays, or a Raid1 array of Raid5 arrays, both basically means 
>that you're wasting most of your storage space for redundancy 
>informations, but that the probability of losing any data is extremely low).

Nah, too much talk.  Better provide images:

http://www.epidauros.be/raid.jpg

-- 
TZOTZIOY, I speak England very best.
"Dear Paul,
please stop spamming us."
The Corinthians


From broek at cc.umanitoba.ca  Wed Feb 22 10:11:58 2006
From: broek at cc.umanitoba.ca (Brian van den Broek)
Date: Wed, 22 Feb 2006 09:11:58 -0600
Subject: Basic coin flipper program - logical error help
In-Reply-To: <1140567243.251982.255620@g14g2000cwa.googlegroups.com>
References: <1140567243.251982.255620@g14g2000cwa.googlegroups.com>
Message-ID: <43FC7F3E.5080007@cc.umanitoba.ca>

DannyB said unto the world upon 21/02/06 06:14 PM:
> I'm just learning Python.  I've created a simple coin flipper program -
> here is the code:
> 
> [source]
> #Coin flipper
> import random
> 
> heads = 0
> tails = 0
> counter = 0
> 
> coin = random.randrange(2)
> 
> while (counter < 100):
>     if (coin == 0):
>         heads += 1
>         counter += 1
>     else:
>         tails += 1
>         counter += 1
> 
> coin = random.randrange(2)

<snip>


> The program runs - however - it will give me 100 heads OR 100 tails.
> Can someone spot the logic error?  

<snip>

Your original question is long since answered. But I've a style point. 
As Dennis Lee Bieber pointed out, you don't need all three 
accumulators. If you keep to the overall style of your code, you can 
avoid repeating yourself as:


while (counter < 100):
      counter += 1   # No point in putting this in each branch
      coin = random.randrange(2)
      if (coin == 0):
          heads += 1
      else:
          tails += 1


For roughly the same style, I'd go with:

heads = 0
count = 100

for i in range(count):
     if random.randrange(2):
         heads += 1

tails = count - heads

HTH,

Brian vdB


From grante at visi.com  Fri Feb 10 20:12:28 2006
From: grante at visi.com (Grant Edwards)
Date: Sat, 11 Feb 2006 01:12:28 -0000
Subject: Socket Programming - Question
References: <1139616664.208516.254900@f14g2000cwb.googlegroups.com>
Message-ID: <11uqefs4f3gq617@corp.supernews.com>

On 2006-02-11, duncanm255 at hotmail.com <duncanm255 at hotmail.com> wrote:

> I am relatively new to Python, and wanted to see if this is
> even possible, and if so how to go about implementing it.
> What I'm looking to do is create a client/server application
> that does the following:
>
> 1)  System2 listens on port > 1023
> 2)  System1 connects to System2 and sends traffic to it - based on the
> traffic it receives (i.e. a special string), System2 executes
> command-line commands and returns the output to System1.

Sure.  Just use os.popen() or one of it's relatives to execute
the program:

http://www.python.org/doc/current/lib/os-newstreams.html#os-newstreams

-- 
Grant Edwards                   grante             Yow!  I'm not available
                                  at               for comment...
                               visi.com            


From harlinseritt at yahoo.com  Thu Feb 23 08:49:06 2006
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 23 Feb 2006 05:49:06 -0800
Subject: mascyma
In-Reply-To: <43fd8161$0$47965$892e7fe2@authen.yellow.readfreenews.net>
References: <43fd8161$0$47965$892e7fe2@authen.yellow.readfreenews.net>
Message-ID: <1140702546.836655.64630@j33g2000cwa.googlegroups.com>

You'll almost certainly need to take a look at mascyma's support
facilities: support web page, forum, etc (provided they do indeed
exist).

Harlin Seritt



From plahey at alumni.caltech.edu  Sat Feb 18 18:29:05 2006
From: plahey at alumni.caltech.edu (plahey at alumni.caltech.edu)
Date: 18 Feb 2006 15:29:05 -0800
Subject: general coding issues - coding style...
References: <slrndve8oe.5jb.mac@news.calmar.ws>
Message-ID: <1140305345.408445.49100@g43g2000cwa.googlegroups.com>

Hi,

1585 if sys.path[0][-12:] == "\library.zip":  #for py2exe

how about

if sys.path[0].endswith( "\\library.zip" ):

(did you really mean one back-slash there?)


499     tuple = os.path.split(filename)

bad variable name... tuple(x) converts a sequence to a tuple.


You have a number of places where you check for len(x)==0:

674     if len(files) == 0:
853     if len(file_show) == 0:
950     if len(imgprocess["files_todo"]) == 0:

people usually recommend:

if not files:
if not file_show:
if not imgprocess["files_todo"]:


you should run your code through pychecker (it had a lot to say...).


You use global alot... that should be a red flag.  Like the poster
above mentioned,  you have things that are telling you they want to
be objects.


The #{{{ and #}}} stuff is very annoying to other programmers
(ok, to me...).  You might want to investigate a Python aware
editor (like SPE, which has pychecker built in).  This is
coming from someone who uses vim regularly.



From john_sips_tea at yahoo.com  Fri Feb  3 17:29:06 2006
From: john_sips_tea at yahoo.com (john_sips_tea at yahoo.com)
Date: 3 Feb 2006 14:29:06 -0800
Subject: fairly large webapp: from Java to Python. experiences?
Message-ID: <1139005746.363918.267370@g47g2000cwa.googlegroups.com>

I've got a fairly substantial webapp written in Java (plus Tomcat,
Hibernate, Struts, JSP, MySQL) that is a bit of a bear to work with. I
didn't write it. Much of it is only very sparsely documented (if at
all). No design docs anywhere. It's a large webapp with many classes
and fairly deep inheritance hierarchies. There seems to be JUnit test
cases in place.

The possibility of re-writing it has come up, and I must say that,
although it would likely be a ton of work, it could also be a real
pythonic adventure. ;) Reasons for a rewrite are to get better
flexibility, easier maintenance (easier to make changes), and the
possibility of really slimming down the size of the thing. And of
course, it would be nice to work with Python -- possibly significantly
more productive.

Does anyone here have any experience with large(ish) webapps in Python?
I was sniffing around the following A-team of toolkits: CherryPy,
Cheetah, SQLObject, all behind Apache2. Has anyone seen performance
issues with Python webapps?

Could one reasonably expect to have an easier time with maintainence
and future modifications with using Python over Java?

Any tips, stories, recommendations, and/or experiences are most
welcome.

Thanks.



From pydecker at gmail.com  Sat Feb 11 13:10:37 2006
From: pydecker at gmail.com (Peter Decker)
Date: Sat, 11 Feb 2006 13:10:37 -0500
Subject: Yet another GUI toolkit question...
In-Reply-To: <43EE1DD2.7040009@wordtech-software.com>
References: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
	<mailman.1747.1139671043.27775.python-list@python.org>
	<43EE1DD2.7040009@wordtech-software.com>
Message-ID: <ca55a9900602111010m3e5fc9c3sab480b6f57dd4f9a@mail.gmail.com>

On 2/11/06, Kevin Walzer <sw at wordtech-software.com> wrote:

> Also, it seems
> very Windows/Linux-centric. Is anyone using it on OS X?

I almost forgot: take a look at this screencast:

http://leafe.com/screencasts/sizers2.html

It's the second part of a demonstration on using sizers in the Dabo
visual designer tool. The first part was done on Linux, and the saved
file was copied over unchanged to OS X, where the demo was completed.

--

# p.d.


From blair.houghton at gmail.com  Thu Feb  2 11:37:12 2006
From: blair.houghton at gmail.com (Blair P. Houghton)
Date: 2 Feb 2006 08:37:12 -0800
Subject: webbrowser module + urls ending in .py = a security hole?
In-Reply-To: <mailman.1244.1138656764.27775.python-list@python.org>
References: <1138593557.824516.116400@g14g2000cwa.googlegroups.com>
	<1138626217.999480.153140@g43g2000cwa.googlegroups.com>
	<1138651762.673682.192210@g43g2000cwa.googlegroups.com>
	<drluph$nfj$1@sea.gmane.org>
	<mailman.1244.1138656764.27775.python-list@python.org>
Message-ID: <1138898232.726612.204160@o13g2000cwo.googlegroups.com>

Peter Hansen wrote:
> It appears the correct approach might be something along the lines of
> reading the registry to find what application is configured for the
> "HTTP" protocol (HKCR->HTTP->shell->open->command) and run that, passing
> it the URL.  I think that would do what most people expect, even when
> the URL actually passed specifies the "file" protocol and not "http".

Yeah...but here's where my mind splits.  I like security, but I'm not
sure I like the idea of breaking URL syntax and treating "file" as
"http" when it's explicitly specified...although in the context of a
URL, that might be the user's intended use-case... so do we go with "do
the secure, probably expected thing" or "do the thing Tim Berners-Lee
designed it to do"?

Since the behavior is "correct" in the "http://" case (the text is
displayed in the browser), and any "file://" access has physical and
network security built into it by nature of never accessing outside the
user's already-accessible file domain, maybe it is "correct" that the
"file://" access be treated as though it was issued from a shell
command or file-explorer window.  Which makes it no security hole at
all, it would seem...

--Blair



From siv.hansen at gmail.com  Mon Feb 27 14:53:09 2006
From: siv.hansen at gmail.com (Cruella DeVille)
Date: 27 Feb 2006 11:53:09 -0800
Subject: type = "instance" instead of "dict"
Message-ID: <1141069989.763239.191140@u72g2000cwu.googlegroups.com>

I'm trying to implement a bookmark-url program, which accepts user
input and puts the strings in a dictionary. Somehow I'm not able to
iterate myDictionary of type Dict{}

When I write print type(myDictionary) I get that the type is
"instance", which makes no sense to me. What does that mean?
Thanks



From neuzhoundxx at yahoo.com  Wed Feb 22 17:55:55 2006
From: neuzhoundxx at yahoo.com (john peter)
Date: Wed, 22 Feb 2006 14:55:55 -0800 (PST)
Subject: event/job scheduling
Message-ID: <20060222225555.64622.qmail@web36701.mail.mud.yahoo.com>

i'd like to do the following kind of event/job scheduling:
  run some task(s) (python code) everyday at (say) 8am for (say) a week.
  
  i need to do this for both windows xp and suse linux machines. although i know
  that i can use cron or its equivalent in windows to kick off the python interpreter,
  i was kinda hoping python has a builtin mechanism i can use for both OSes.
  
  can python's scheduler class do the job? if so, can someone share some code
  snippets (it's not clear to me from reading the docs if python's scheduler class
  can do the job).
  
  if python's scheduler class cannot do the job, can someone recommend a  third-party software/library that can do the job?  thanks for any  help!
  
  

__________________________________________________
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From grante at visi.com  Thu Feb 23 08:18:54 2006
From: grante at visi.com (Grant Edwards)
Date: Thu, 23 Feb 2006 13:18:54 -0000
Subject: editor for Python on Linux
References: <dtai6e$23m$2@ariane.blic.net>
Message-ID: <11vrdhuk4jo0p74@corp.supernews.com>

On 2006-02-19, Mladen Adamovic <adamm_n0 at spamm_blic.net> wrote:

> I wonder which editor or IDE you can recommend me for writing
> Python programs. I tried with jEdit but it isn't perfect.

jed

-- 
Grant Edwards                   grante             Yow!  Vote for ME
                                  at               -- I'm well-tapered,
                               visi.com            half-cocked, ill-conceived
                                                   and TAX-DEFERRED!


From hancock at anansispaceworks.com  Tue Feb 14 20:36:22 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Tue, 14 Feb 2006 19:36:22 -0600
Subject: how do you pronounce 'tuple'?
In-Reply-To: <1f7befae0602140740s5c1abdfdh85618233dbaa68b6@mail.gmail.com>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<11v032ii4gvik72@corp.supernews.com>
	<1139816300.706181.79250@f14g2000cwb.googlegroups.com>
	<1f7befae0602140740s5c1abdfdh85618233dbaa68b6@mail.gmail.com>
Message-ID: <20060214193622.1fe8e9cf@samwise.anansi>

On Tue, 14 Feb 2006 10:40:09 -0500
Tim Peters <tim.peters at gmail.com> wrote:
> the-acid-test-is-whether-you-say-"xor"-with-one-syllable-
> or-three-ly y'rs  - tim -- 

Oh dear, I say it with two, am I just not cool, or what?
;-)

"ex-or"

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From lycka at carmen.se  Tue Feb 28 03:15:00 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Tue, 28 Feb 2006 09:15:00 +0100
Subject: wxPython: help(wx) causes segfaulting?
In-Reply-To: <kq06029b0pt9299labschhvp8asp048id1@4ax.com>
References: <mailman.2457.1140992731.27775.python-list@python.org>
	<usi502h2ltmbvt7e58blv4hhsitseg565u@4ax.com>
	<1141044915.517203.16390@i40g2000cwc.googlegroups.com>
	<kq06029b0pt9299labschhvp8asp048id1@4ax.com>
Message-ID: <du10q7$ttc$1@wake.carmen.se>

Franz Steinhaeusler wrote:
> maybe you have 2.4.2 and I 2.4.

This looks like a wxPython problem, not a Python problem.
It might well be a version issue for you guys, but it's
more likely that a certain wxPython version is the culprit,
not a certain Python version.

Note however that the OP is using Linux, where the wxWidgets
uses completely different libraries, and that's where the
problem occurs. Besides, it's not a Python exception in the
Debian testing case, it's a segmentation fault in the
underlying GLib code that causes Python to crash.

BTW, Is the current Debian testing really equipped with
Python 2.3.5? It's a very sorry state of affairs if the
testing version of a major Linux release isn't using
Python 2.4, which was released in November 2004.

I can understand why people a leaving stock Debian for
Ubuntu...


From fredrik at pythonware.com  Wed Feb  8 12:25:25 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 8 Feb 2006 18:25:25 +0100
Subject: Mixing custom __setattr__ method and properties in new style
	classes
References: <1139418477.572639.154300@z14g2000cwz.googlegroups.com>
Message-ID: <dsd9i7$8rd$1@sea.gmane.org>

"L.C. Rees" wrote:

> This is the code for the property at the end of the class definition:
>
>     def _settext(self, txt):
>         self._tree.text = txt
>
>     def _gettext(self, txt):
>         return self._tree.text
>
>     def _deltext(self, txt):
>         self._tree.text = ''
>
>     text = property(_settext, _gettext, _deltext)

hint:

>>> help(property)

class property(object)
 |  property(fget=None, fset=None, fdel=None, doc=None) -> property attribute
 |
 |  fget is a function to be used for getting an attribute value, and likewise
 |  fset is a function for setting, and fdel a function for del'ing, an
 |  attribute.  Typical use is to define a managed attribute x:
 |  class C(object):
 |      def getx(self): return self.__x
 |      def setx(self, value): self.__x = value
 |      def delx(self): del self.__x
 |      x = property(getx, setx, delx, "I'm the 'x' property.")

</F>





From fredrik at pythonware.com  Tue Feb 28 14:00:41 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 28 Feb 2006 20:00:41 +0100
Subject: escaping quotes
References: <pN0Nf.1679$No6.39699@news.tufts.edu>
Message-ID: <du26kq$nui$1@sea.gmane.org>

John Salerno wrote:

> I'm reading through the tutorial and found this in section 3:
>
>  >>> '"Isn\'t," she said.'
> '"Isn\'t," she said.'
>
> Why doesn't the escape sequence work in this case?

because the interactive prompt echos the result back to you as
a Python literal, where possible.  compare

>>> '"Isn\'t," she said.'
'"Isn\'t," she said.'

with

>>> print '"Isn\'t," she said.'
"Isn't," she said.

(this is explained a little later in the chapter you're reading)

</F>





From fredrik at pythonware.com  Mon Feb  6 05:36:41 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 6 Feb 2006 11:36:41 +0100
Subject: OO conventions
References: <mailman.1334.1138833641.27775.python-list@python.org><pan.2006.02.02.11.08.33.964@REMOVETHIScyber.com.au><1138971920.353603.38040@f14g2000cwb.googlegroups.com><1138993768.634863.166250@f14g2000cwb.googlegroups.com>
	<1139221726.376326.73560@g44g2000cwa.googlegroups.com>
Message-ID: <ds78rr$r8o$1@sea.gmane.org>

Nicola Musatti wrote:

> > def factory(info):
> >     k = Klass()
> >     data = get_initial_data(info)
> >     k.set_data(data)
> >     return k
> >
> > to:
> >
> > def factory(info):
> >     data = get_initial_data(info)
> >     return Klass(data)
> >
> > What would be the value of doing the initialization in a separate
> > method, rather than the constructor?
>
> I didn't express my intent clearly. I agree that in general your second
> example is to be preferred to the first one. In fact the only reason I
> could think of using the first scheme is when the second would lead to
> Klass's __init__ method having a large number of parameters.
>
> What is important to me is to keep your get_initial_data() function
> outside Klass if it's task is non trivial, e.g. it has to interact with
> the OS or a DB.

why ?

</F>





From ironkan at gmail.com  Mon Feb 13 16:45:29 2006
From: ironkan at gmail.com (ironkan)
Date: 13 Feb 2006 13:45:29 -0800
Subject: hard disk activity
In-Reply-To: <1139864840.300396.170070@o13g2000cwo.googlegroups.com>
References: <1139850420.902979.71620@o13g2000cwo.googlegroups.com>
	<g9i1v1lbf2rhmgskmkh5f9mt73s67umckk@4ax.com>
	<1139857505.376840.37440@g43g2000cwa.googlegroups.com>
	<1139859890.407497.124870@o13g2000cwo.googlegroups.com>
	<1139863885.755813.324450@g47g2000cwa.googlegroups.com>
	<7xfymn0yda.fsf@ruckus.brouhaha.com>
	<1139864840.300396.170070@o13g2000cwo.googlegroups.com>
Message-ID: <1139867129.904719.303490@g14g2000cwa.googlegroups.com>

Maybe an example will help

file A

abef | 1938 | 4bac | 0def | 8675

file B

adef | 0083 | abfd | 3356 | 2465

File A is different from file B and you want to have File A look like
File B.  So do the segmentation (I have chosen ' | ' as the divide
between segments).

After that do checksums on each segment.  For each segment's checksum
that differ there's a discrepancy between the two segments.  So make
the changes to have one segment look like the other segment.

In this example the first segment's checksum would be the same whereas
the checksum for segments 2, 3, 4, and 5 will be different.  So modify
the bits and bytes accordingly.

You may want to pursue this subject further by looking into various
error correction algorithms.

VSmirk wrote:
> Aweseme!!!  I got as far as segmenting the large file on my own, and I
> ran out of ideas.  I kind of thought about checksum, but I never put
> the two together.
> 
> Thanks.  You've helped a lot....
> 
> V



From erniedude at gmail.com  Tue Feb  7 16:57:00 2006
From: erniedude at gmail.com (Ernesto)
Date: 7 Feb 2006 13:57:00 -0800
Subject: tricky regular expressions
In-Reply-To: <dsb3gd$d5o$1@apollon.grec.isp.9tel.net>
References: <1139343779.721205.221410@f14g2000cwb.googlegroups.com>
	<dsb3gd$d5o$1@apollon.grec.isp.9tel.net>
Message-ID: <1139349420.713243.271570@z14g2000cwz.googlegroups.com>


Xavier Morel wrote:
> Ernesto wrote:
> > I'm not sure if I should use RE's or some other mechanism.  Thanks
> >
> I think a line-based state machine parser could be a better idea. Much
> simpler to build and debug if not faster to execute.

What is a line-based state machine ?



From pommereau at univ-paris12.fr  Tue Feb  7 10:49:04 2006
From: pommereau at univ-paris12.fr (Franck Pommereau)
Date: Tue, 07 Feb 2006 16:49:04 +0100
Subject: The problem of anonymity with decorators
Message-ID: <43e8c0bb$0$22678$79c14f64@nan-newsreader-07.noos.net>

Dear all,

I would like to work around the "anonymizing" effect of decorators when
an exception is raised in the wrapped function. Let's consider the
following example:

    def int_result (fun) :
        def wrapped (*largs, **kwargs) :
            result = fun(*largs, **kwargs)
            if not isinstance(result, int) :
                raise TypeError, "should return int"
            return result
        return wrapped

    @int_result
    def add (a, b) :
        return a+b

    print add(1, 2)
    print add("foo", "bar")

As expected, the last line results in raising TypeError:

    Traceback (most recent call last):
      File "wrapping.py", line 14, in ?
        print add("foo", "bar")
      File "wrapping.py", line 5, in wrapped
        raise TypeError, "should return int"
    TypeError: should return int

My problem is that the errors comes from a function named "wrapped"
while I'd prefer to see here the name of the wrapped function. Indeed,
the code above is only a stripped down sample code but in my
application, I'll have a lot of functions, all wrapped the same way. So
I'd prefer a traceback like:

    Traceback (most recent call last):
      File "wrapping.py", line 14, in ?
        print add("foo", "bar")
      File "wrapping.py", line 8, in add (wrapped)
        @int_result
    TypeError: should return int

Where the exception seems to come from the point where add "was"
wrapped, instead of from the inside of the wrapper.

I tried to change wrapper.__name__ and wrapper.func_name but it does not
change the traceback, and wrapper.func_code.co_name is read-only. I also
tried, unsuccessfully, to rename functions with:

    import new
    def rename (fun, name) :
        return new.function(fun.func_code, {}, name)

So, my questions:
 - can I change a function name so that it affects the traceback when an
   exception is raised in the function?
 - is there some special trick to raise an exception making it, in
   appearance, coming from somewhere else?

Thanks in advance for any answer.

Regards,
Franck


From nir at digitalpeers.com  Thu Feb  9 14:42:10 2006
From: nir at digitalpeers.com (Nir Aides)
Date: Thu, 09 Feb 2006 21:42:10 +0200
Subject: sys.path and unicode folder names
In-Reply-To: <43eb7297$0$21712$9b622d9e@news.freenet.de>
References: <43e8c2ae$1@news.bezeqint.net>
	<43e8f3eb$0$7988$9b622d9e@news.freenet.de>
	<43e99e5e@news.bezeqint.net> <43EA3F20.2020402@v.loewis.de>
	<43ea541e@news.bezeqint.net> <43EA61B8.9040905@v.loewis.de>
	<43eaf704@news.bezeqint.net>
	<43eb7297$0$21712$9b622d9e@news.freenet.de>
Message-ID: <43eb978d@news.bezeqint.net>

Martin v. L?wis wrote:
> Nir Aides wrote:
>> If few people use file names not in their respective CP_ACP as you say,
>> why did Microsoft bother to make Windows XP a unicode OS?
> 
> Because it simplifies their implementation, in the long run.
> 
>> It is because of this situation that people in non-English speaking
>> countries prefer to install English Windows XP. After all why should
>> they get all messed up with incompatible software?
> 
> I see. Why do these people then refuse to change the code page of
> their system (which *is* possible, even in English XP)?
> 

They don't refuse. You assume they actually know about its existence. I 
think that in  most cases they are not aware of that thing. Sometimes 
they call their 10 year old neighbors to fix their computer if they are 
tired of seeing garbage on their screen instead of readable characters, 
but their computer usually crashes under the heavy load of dozens of 
viruses and spy-ware long before that kid neighbor gets a chance to look 
at it anyway.

>> Python is Broken.
> 
> I agree. Please contribute a patch.
> 

I will do my best.

> Regards,
> Martin


From johnjsal at NOSPAMgmail.com  Thu Feb 23 12:05:29 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 23 Feb 2006 17:05:29 GMT
Subject: a little more help with python server-side scripting
In-Reply-To: <WJlLf.1657$No6.38822@news.tufts.edu>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<Lc0Lf.1652$No6.38850@news.tufts.edu>
	<slrndvp4tc.9ng.sybrenUSE@schuimige.unrealtower.org>
	<WJlLf.1657$No6.38822@news.tufts.edu>
Message-ID: <tXlLf.1658$No6.38711@news.tufts.edu>

John Salerno wrote:
> Sybren Stuvel wrote:
> 
>> Check out PSP.
> 
> I found a PSP website that said this:
> 
> ---------
> In general, PSP pages are like normal HTML files with two exceptions:
> 
> 1. They always have a .PSP file extension
> 2. They can have JPython code embedded in them
> ---------
> 
> That sounds like just what I want, except do I have to write my code in 
> Jython? Can't I just use regular Python?

After a little more investigation, this seems to be just one 
implementation of PSP. I need to just figure out how to get 'regular' 
PSP working for me, or if it's even possible on a Windows 2003 server.


From paul at boddie.org.uk  Fri Feb  3 12:59:35 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 3 Feb 2006 09:59:35 -0800
Subject: Compiling
References: <mailman.1387.1138986082.27775.python-list@python.org>
Message-ID: <1138989575.503830.197820@g47g2000cwa.googlegroups.com>

Simon Faulkner wrote:
>
> I love Python for it's ease and speed of development especially for the
> "Programming Challenged" like me but why hasn't someone written a
> compiler for Python?

There are various compilers for Python, but they vary in terms of
capabilities, language support and method of operation. Disregarding
Jython and the jythonc tool, which I believe is somewhat inspired by
earlier tools for CPython, there has been a fair amount of activity and
a number of works and/or papers on the topic.

First of all, there have been conventional compilers such as "Python to
C" [1] and other early attempts to do similar things [2, 3, 4]; such
work possibly informed the construction of some of the
bundler/installer tools [5]. Then, there were later attempts such as
Starkiller [6] to produce low-level language code, and also compilers
which produce other high-level languages [7, 8]. Most of the
aforementioned projects have attempted to deal with "normal" Python,
possibly with the exception of Starkiller. Subsequent works which deal
with more restricted dialects of Python include ShedSkin [9].

Then, there are hybrid language compilers such as Pyrex [10] which
avoid the issues of turning highly dynamic Python code into some
low-level representation by allowing programmers to write
speed-critical sections in a special Python dialect which translates
better into C/C++. Finally, there are just-in-time compilers such as
Psyco [11] which make use of run-time information to generate machine
code specialised for the operations being performed; the PyPy project
[12] appears to have such concerns in mind in the design of possible
replacement virtual machines for Python.

> I guess it's not that simple eh?

Well, there have been other projects, too. Once upon a time there was a
promising alternative implementation of Python called Vyper [13, 14]
but work on that was discontinued. One prematurely-hyped work, pycore
[15], involved translating Python to Smalltalk but disappeared almost
instantly.

I believe that many Python programmers who are vocal on such topics
don't want to surrender any of the functionality that they've become
accustomed to, and with additional functionality arriving all the time
in CPython, it's arguably difficult to reconcile such functionality
with performant low-level code generation (at least in advance of
run-time). That said, there has been a movement to introduce static
typing, ostensibly for reliability purposes, but such justifications
have arguably arisen because claims about the various proposed typing
models and performance have largely gone unproven.

Paul

[1] http://sourceforge.net/projects/p2c/
[2] http://www.python.org/workshops/1996-06/papers/hugunin.IPCIV.html
[3]
http://www.foretec.com/python/workshops/1998-11/proceedings/papers/riehl/riehl.html
[4]
http://www.foretec.com/python/workshops/1998-11/proceedings/papers/aycock-211/aycock211.html
[5] http://davidf.sjsoft.com/mirrors/mcmillan-inc/install1.html
[6] http://www.python.org/pycon/dc2004/papers/1/
[7] http://perthon.sourceforge.net/
[8]
http://www.python.org/workshops/2000-01/proceedings/papers/aycock/aycock.html
[9] http://sourceforge.net/projects/shedskin/
[10] http://www.cosc.canterbury.ac.nz/~greg/python/Pyrex/
[11] http://psyco.sourceforge.net/
[12] http://codespeak.net/pypy/dist/pypy/doc/news.html
[13] http://monkeyfist.com/articles/266
[14] http://gnosis.cx/publish/programming/charming_python_8.html
[15]
http://webpages.charter.net/allanms/2004/08/you-dont-tug-on-supermans-cape.html



From rrr at ronadam.com  Sun Feb 26 21:01:51 2006
From: rrr at ronadam.com (Ron Adam)
Date: Sun, 26 Feb 2006 20:01:51 -0600
Subject: sort one list using the values from another list
In-Reply-To: <1hbdmux.1uvypp25sjx7jN%aleaxit@yahoo.com>
References: <mailman.2447.1140969980.27775.python-list@python.org>
	<Bb-dncKoOeYvQ5zZRVn-uw@comcast.com>
	<1140981038.788111.93500@j33g2000cwa.googlegroups.com>
	<9bpMf.109707$4l5.58949@dukeread05>
	<1140990438.693026.14600@p10g2000cwp.googlegroups.com>
	<00sMf.109743$4l5.9230@dukeread05>
	<1hbdmux.1uvypp25sjx7jN%aleaxit@yahoo.com>
Message-ID: <I6tMf.109755$4l5.106334@dukeread05>

Alex Martelli wrote:
> Ron Adam <rrr at ronadam.com> wrote:
>    ...
>> Considering the number time I sort keys after getting them, It's the 
>> behavior I would prefer.  Maybe a more dependable dict.sortedkeys() 
>> method would be nice.  ;-)
> 
> sorted(d) is guaranteed to do exactly the same thing as sorted(d.keys())
> AND to be faster (would be pretty weird if it weren't faster...!).
> 
> E.g., ...:
> 
> helen:~ alex$ python -mtimeit -s'd=dict(enumerate("tarazoplay"))'
> 'sorted(d.keys())'
> 100000 loops, best of 3: 6.82 usec per loop
> 
> helen:~ alex$ python -mtimeit -s'd=dict(enumerate("tarazoplay"))'
> 'sorted(d)'
> 100000 loops, best of 3: 5.98 usec per loop
> 
> 
> Alex


Yes, it did decrease it.  And simplified it as well. ;)


def psort11(s1, s2):
     d = dict(zip(s2, s1))
     assert len(d) == len(s1)
     sorted(d)
     s1[:] = d.values()


psort1 0.554 s
psort2 0.727 s
psort3 0.295 s
psort4 0.293 s
psort5 0.831 s
psort6 0.438 s
psort7 0.575 s
psort8 0.845 s
psort9 0.424 s
psort10 0.235 s
psort11 0.206 s





From claudio.grondi at freenet.de  Tue Feb 28 18:10:22 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Wed, 01 Mar 2006 00:10:22 +0100
Subject: Firebird and Python
In-Reply-To: <1141158781.266021.319020@z34g2000cwc.googlegroups.com>
References: <1140716394.225560.27920@t39g2000cwt.googlegroups.com>
	<mailman.2364.1140721473.27775.python-list@python.org>
	<1140727082.800917.44550@i40g2000cwc.googlegroups.com>
	<dtmk8t$an9$1@wake.carmen.se>
	<mailman.2392.1140782962.27775.python-list@python.org>
	<dtni65$dnv$1@wake.carmen.se> <dtno33$qbk$1@nemesis.news.tpi.pl>
	<dtv83h$t52$1@wake.carmen.se>
	<mailman.2491.1141079616.27775.python-list@python.org>
	<440456C9.4080604@freenet.de>
	<1141158781.266021.319020@z34g2000cwc.googlegroups.com>
Message-ID: <du2l8s$m6b$1@newsreader3.netcologne.de>

haxier wrote:
> All the info you need is in the kinterbasdb module. I've worked with it
> under windows and Linux and... "it just works". Really well indeed. I'd
> recommend it a lot.
> 
> http://kinterbasdb.sourceforge.net/dist_docs/usage.html#faq_fep_embedded_using_with
> 
> --
> Asier.
> 
Thanks - you have provided exactly the information I asked for.

Thanks also to Magnus (yes I asked for the in-process feature).

Claudio


From user at example.net  Sat Feb  4 11:08:33 2006
From: user at example.net (pyluke)
Date: Sat, 04 Feb 2006 16:08:33 GMT
Subject: re.search slashes
Message-ID: <Yj4Ff.746690$x96.167598@attbi_s72>

I'm parsing LaTeX document and want to find lines with equations blocked 
by "\[" and "\]", but not other instances of "\[" like "a & b & c \\[5pt]"

so, in short, I was to match "\[" but not "\\]"

to add to this, I also don't want lines that start with comments.


I've tried:
check_eq = re.compile('(?!\%\s*)\\\\\[')
check_eq.search(line)

this works in finding the "\[" but also the "\\["

so I would think this would work
check_eq = re.compile('(?![\%\s*\\\\])\\\\\[')
check_eq.search(line)

but it doesn't.  Any tips?


From siona at chiark.greenend.org.uk  Tue Feb  7 08:15:18 2006
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 07 Feb 2006 13:15:18 +0000 (GMT)
Subject: Code Feedback
References: <1139247238.520281.144670@f14g2000cwb.googlegroups.com>
Message-ID: <2zi*zDI+q@news.chiark.greenend.org.uk>

mwt <michaeltaft at gmail.com> wrote:
>1) Is this good Python code? What should be changed to make it more
>Pythonesque?

>        while not len(self.stacks) > 0:

        while not self.stacks:

An empty list is considered to be false, hence testing the list
itself is the same as testing len(l) > 0 .

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From eoinrogers at gmail.com  Sun Feb  5 12:02:48 2006
From: eoinrogers at gmail.com (Byte)
Date: 5 Feb 2006 09:02:48 -0800
Subject: Learning Python
In-Reply-To: <mailman.1439.1139157505.27775.python-list@python.org>
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
	<1139156577.897100.69140@g43g2000cwa.googlegroups.com>
	<mailman.1439.1139157505.27775.python-list@python.org>
Message-ID: <1139158796.288778.244000@z14g2000cwz.googlegroups.com>

http://docs.python.org/tut/node6.html#SECTION006100000000000000000



From kayama at st.rim.or.jp  Sat Feb 25 12:00:53 2006
From: kayama at st.rim.or.jp (Akihiro KAYAMA)
Date: Sun, 26 Feb 2006 02:00:53 +0900 (JST)
Subject: Pure python implementation of string-like class
In-Reply-To: <1140878638.666329.316900@u72g2000cwu.googlegroups.com>
References: <mailman.2417.1140830817.27775.python-list@python.org>
	<1140878638.666329.316900@u72g2000cwu.googlegroups.com>
Message-ID: <20060226.020053.41701526.kayama@st.rim.or.jp>

Hi And.

In article <1140878638.666329.316900 at u72g2000cwu.googlegroups.com>,
and-google at doxdesk.com writes:

and-google> Akihiro KAYAMA wrote:
and-google> > As the character set is wider than UTF-16(U+10FFFF), I can't use
and-google> > Python's native unicode string class.
and-google> 
and-google> Have you tried using Python compiled in Wide Unicode mode
and-google> (--enable-unicode=ucs4)? You get native UTF-32/UCS-4 strings then,
and-google> which should be enough for most purposes.

>From my quick survey, Python's Unicode support is restricted to
UTF-16 range(U+0000...U+10FFFF) intentionally, regardless of
--enable-unicode=ucs4 option. 

> Python 2.4.1 (#2, Sep  3 2005, 22:35:47) 
> [GCC 2.95.4 20020320 [FreeBSD]] on freebsd4
> Type "help", "copyright", "credits" or "license" for more information.
> >>> u"\U0010FFFF"
> u'\U0010ffff'
> >>> len(u"\U0010FFFF")
> 1
> >>> u"\U00110000"
> UnicodeDecodeError: 'unicodeescape' codec can't decode bytes in position 0-9: illegal Unicode character

Simple patch to unicodeobject.c which disables unicode range checking
could solve this, but I don't want to maintenance specialized Python
binary for my project.

-- kayama


From kent at kentsjohnson.com  Sun Feb 12 10:36:58 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Sun, 12 Feb 2006 10:36:58 -0500
Subject: Can I get the 8bit-string representation of any unicode string
In-Reply-To: <1139757073.364694.176200@g14g2000cwa.googlegroups.com>
References: <1139757073.364694.176200@g14g2000cwa.googlegroups.com>
Message-ID: <43ef51cc_1@newspeer2.tds.net>

wanghz at gmail.com wrote:
> Hello, everyone.
> 
> I have a problem when I'm processing unicode strings.  Is it possible
> to get the 8bit-string representation of any unicode string?

Yes, if you can be more precise about what you mean by '8bit-string 
representation'. Likely candidates are
b.encode('utf-8')
b.encode('utf_16_be')
b.encode('utf_16_le')

Kent

> 
> Suppose I get a unicode string:
>   a = u'\xc8\xce\xcf\xcd\xc6\xeb';
> then, by
>   a.encode('latin-1');
> I can get the 8bit-string representation of it, that is, the physical
> storage format of this string.
> 
> But for another kind of unicode string, say:
>   b = u'\u4efb\u8d24\u9f50';
> I have to:
>   b.encode('utf-8')
> to get the 8bit-string format of it.
> 
> Since these unicode strings are given by an external library function,
> I don't know which kind a unicode string belongs to before I get it at
> runtime.  So, I wonder if there is a unified way to get the 8bit-string
> representation, say, byte-by-byte, of any unicode string?
> 
> Thank you very much.
> 


From apgwoz at gmail.com  Thu Feb  9 09:35:50 2006
From: apgwoz at gmail.com (Andrew Gwozdziewycz)
Date: Thu, 9 Feb 2006 09:35:50 -0500
Subject: Twisted book opinions?
In-Reply-To: <43EB295B.1020404@pollenation.net>
References: <mailman.1638.1139452774.27775.python-list@python.org>
	<dsf7qb$2rl$1@scotsman.ed.ac.uk> <43EB295B.1020404@pollenation.net>
Message-ID: <8ba244fb0602090635k5aa6615emaa8df2ca42a3e81d@mail.gmail.com>

> It's really more of an example based tutorial book than cookbook.
> What it does do really well is 'networking programming essentials'. I
> found it quite a good book and managed to write a distributed ssh cron
> tool in an evening after reading the sections on SSH.

I would second that. The examples are very good, and it breaks down
the code and explains the new concepts.

> What I'd really like now is a 'Web Application Development with
> Twisted/Nevow' book that takes off where this 'network protocol'
> oriented book leaves off.

I thought the O'Reilly book was pretty decent at describing how to
setup a web application. It's not entirely complete, but I was able to
piece together an application with a somewhat complex web application
on top of it. Twisted made it quite easy.


--
Andrew Gwozdziewycz <apgwoz at gmail.com>
http://ihadagreatview.org
http://plasticandroid.org


From jack at gulcas.org  Sat Feb  4 17:58:32 2006
From: jack at gulcas.org (jack)
Date: Sat, 04 Feb 2006 23:58:32 +0100
Subject: python port for iPod
Message-ID: <43E53198.5080909@gulcas.org>

Hi,
  Since May 2005 there is a port of python (v2.4.1) for Apple iPod.
  Porting was an 'easy' job, the only consideration was how you can
write with a
  iPod, ipodlinux [1] people did an interface called iPodRead that
allows you
  type into iPod scrolling left or right on the wheel. (This affects to
the file
  Parser/myreadline.c, line 47).
  Furthermore, is necessary run configure with options: --without-threads,
  --without-shared and --with-cxx and build it in a cross-compile
environment
  for ARM architecture.

  Running make the only problem was the function hypot (umm, like ipod
:)  in the math
  module (I don't remember the problem) but i had to change hypot(x,y) to
  sqrt(x*x+y*y).

  You can see the differences between python original and python ported
source
  in [2].

  First announce about the port can be found in [3].
  More info about this port, cool pictures and binaries & source code in
[4].

 [1] http://ipodlinux.org
 [2] http://www.ciberjacobo.com/en/diffs.html
 [3] http://ipodlinux.org/forums/viewtopic.php?t=1945
 [4] http://www.ciberjacobo.com/en/linux_on_ipod.html#python


-- 
Jacobo Avariento Gimeno
http://ciberjacobo.com
OpenPGP key: http://ciberjacobo.com/key.pem


From fuzzyman at gmail.com  Mon Feb  6 17:34:15 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 6 Feb 2006 14:34:15 -0800
Subject: UTF16, BOM, and Windows Line endings
In-Reply-To: <SXPFf.245245$V7.89096@news-server.bigpond.net.au>
References: <1139224580.820529.198120@z14g2000cwz.googlegroups.com>
	<SXPFf.245245$V7.89096@news-server.bigpond.net.au>
Message-ID: <1139265255.239649.10100@g47g2000cwa.googlegroups.com>


Neil Hodgson wrote:
> Fuzzyman:
>
> > How should I handle line-endings for UTF16 ? Is it possible that other
> > programs (on windows) will have line endings as u'\r\n' ?
>
>     Yes, try Notepad and save as Unicode. For the text
>
> Fuzzy
> End of lines
>
>  >>> contents = open("C:\\fuzzy.txt", "rb").read()
>  >>> contents
> '\xff\xfeF\x00u\x00z\x00z\x00y\x00\r\x00\n\x00E\x00n\x00d\x00
> \x00o\x00f\x00 \x00l\x00i\x00n\x00e\x00s\x00'
>  >>>
>
>     The '\r\x00\n\x00' is a u'\r\n'.
>
>  > When saving
> > files for that platform should I make the line endings u'\r\n' ? (This
> > sequence obviously encodes to four bytes in UTF16). I would only do
> > this to ensure compatibility with other programs the user may use to
> > create the text files.
>
>     Notepad will read u'\r\n'. It doesn't like '\n' or u'\n'. Some
> applications are OK with other line ends by '\r\n' and u'\r\n' are
> safest on Windows.
>

Thanks - so I need to decode to unicode and *then* split on line
endings. Problem is, that means I can't use Python to handle line
endings where I don't know the encoding in advance.

In another thread I've posted a small function that *guesses* line
endings in use.

All the best,


Fuzzyman
http://www.voidspace.org.uk/python/index.shtml

>     Neil



From bradfordh at gmail.com  Tue Feb  7 12:27:09 2006
From: bradfordh at gmail.com (Tempo)
Date: 7 Feb 2006 09:27:09 -0800
Subject: Is Python good for web crawlers?
In-Reply-To: <44s30nF38tqrU1@uni-berlin.de>
References: <1139330008.270988.227170@g44g2000cwa.googlegroups.com>
	<mailman.1555.1139330693.27775.python-list@python.org>
	<1139332188.851343.20580@g14g2000cwa.googlegroups.com>
	<44s30nF38tqrU1@uni-berlin.de>
Message-ID: <1139333229.770945.215990@g43g2000cwa.googlegroups.com>

Does a web crawler have to download an entire page if it only needs to
check if the product is in stock on a page? Or if it just needs to
search for one match of a certain word on a page?



From deets at nospam.web.de  Fri Feb 10 08:54:44 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 10 Feb 2006 14:54:44 +0100
Subject: Create dict from two lists
References: <1139579518.129742.265680@o13g2000cwo.googlegroups.com>
Message-ID: <453k9eF444frU1@uni-berlin.de>

py wrote:

> I have two lists which I want to use to create a dictionary.  List x
> would be the keys, and list y is the values.
> 
> x = [1,2,3,4,5]
> y = ['a','b','c','d','e']
> 
> Any suggestions?  looking for an efficent simple way to do this...maybe
> i am just having a brain fart...i feel like this is quit simple.

dict(zip(x,y))

Diez


From nyamatongwe+thunder at gmail.com  Mon Feb 27 00:49:54 2006
From: nyamatongwe+thunder at gmail.com (Neil Hodgson)
Date: Mon, 27 Feb 2006 05:49:54 GMT
Subject: Unicode and MoinMoin
In-Reply-To: <1141017252.469296.139410@v46g2000cwv.googlegroups.com>
References: <1141017252.469296.139410@v46g2000cwv.googlegroups.com>
Message-ID: <6qwMf.17099$yK1.13214@news-server.bigpond.net.au>

Greg:

> The only issue I'm having relates to Unicode. MoinMoin and python are
> pretty unforgiving about files that contain Unicode characters that
> aren't included in the coding properly. I've spent hours reading about
> Unicode, and playing with different encoding/decoding commands, but at
> this point, I just want a hacky solution that will ignore the
> improperly coded characters or replace them with placeholders.

    Call the codec with the errors argument set to "ignore" or "replace".

 >>> unicode('AUTHOR: blahblah\n\nTITLE: Reading Course Readings... G. 
A. \x96 For references see blahblah.\n\n\n-----\n\n', 'utf8')
Traceback (most recent call last):
   File "<interactive input>", line 1, in ?
   File "c:\python24\lib\encodings\utf_8.py", line 16, in decode
     return codecs.utf_8_decode(input, errors, True)
UnicodeDecodeError: 'utf8' codec can't decode byte 0x96 in position 58: 
unexpected code byte
 >>> unicode('AUTHOR: blahblah\n\nTITLE: Reading Course Readings... G. 
A. \x96 For references see blahblah.\n\n\n-----\n\n', 'utf8', 'replace')
u'AUTHOR: blahblah\n\nTITLE: Reading Course Readings... G. A. \ufffd For 
references see blahblah.\n\n\n-----\n\n'

    BTW, its probably in Windows-1252 where it would be a dash. 
Depending on your context it may pay to handle the exception instead of 
using "replace" and attempt interpreting as Windows-1252.

    Neil


From mooquack at suad.org  Wed Feb  1 22:48:19 2006
From: mooquack at suad.org (Kirk McDonald)
Date: Wed, 01 Feb 2006 19:48:19 -0800
Subject: nDimensional sparse histogram in python.
In-Reply-To: <1138850837.309044.169130@g44g2000cwa.googlegroups.com>
References: <1138848672.791908.90050@g44g2000cwa.googlegroups.com>
	<1ha3gff.u4comocxo4ddN%aleaxit@yahoo.com>
	<1138849589.663600.301610@z14g2000cwz.googlegroups.com>
	<mailman.1340.1138850458.27775.python-list@python.org>
	<1138850837.309044.169130@g44g2000cwa.googlegroups.com>
Message-ID: <43e18006$1@nntp0.pdx.net>

KraftDiner wrote:
> The dictionary is sorted by the point key.
> Is there a way to sort the dictionary by the value?
> Seems to me this goes against the purpose of a dictionary but....
> thats what I need to do..
> 

Well, it's probably not all that efficient, but it is simple code:

sortedList = [(v, k) for k, v in self.histo.items()]
sortedList.sort()

Should do it...

-Kirk McDonald


From aleaxit at yahoo.com  Sun Feb 26 11:33:43 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 26 Feb 2006 08:33:43 -0800
Subject: sort one list using the values from another list
References: <mailman.2447.1140969980.27775.python-list@python.org>
Message-ID: <1hbcy1h.1b2hzdxu0q0k9N%aleaxit@yahoo.com>

Brian Blais <bblais at bryant.edu> wrote:

> Hello,
> 
> I have two lists, one with strings (filenames, actually), and one with a
> real-number rank, like:
> 
> A=['hello','there','this','that']
> B=[3,4,2,5]
> 
> I'd like to sort list A using the values from B, so the result would be in
> this example,
> 
> A=['this','hello','there','that']
> 
> The sort method on lists does in-place sorting.  Is there a way to do what
> I want here?

Sure, many ways, mostly ones based on the "Decorate-Sort-Undecorate"
idiom and its incarnation as the key= optional argument to function
sorted and list method sort.  I believe that a more explicit DSU is
ideal (clearer, though maybe a tad slower) in your case:

_aux = zip(B, A)
_aux.sort()
A[:] = [a for b, a in _aux]

Twisting things to use the speedy key= approach seems more "contorted"
and less general in this case, and it also needs an auxiliary structure
(to avoid slowing things down by repeated .index calls) However, things
may be different if you need to consider the possibility that B has some
duplicate items, and deeply care for such a case NOT to result in
comparisons of items of A.  The above approach would then have to be
changed, e.g., to:

_aux = zip(B, enumerate(A))
_aux.sort()
A[:] = [a for (b, (i, a)) in _aux]

where I've also added a pair of redundant parentheses to make the
nesting structure of items of _aux more obvious.  Of course, each of
these has a variant using sorted instead of sort, and for those you
could use izip from itertools rather than built-in zip, and do
everything within one single statement, etc, etc.


Alex


From mistobaan at gmail.com  Wed Feb 22 03:55:43 2006
From: mistobaan at gmail.com (Fabrizio Milo)
Date: Wed, 22 Feb 2006 09:55:43 +0100
Subject: cPAMIE 2.0 released!!
In-Reply-To: <1140488263.385868.46220@o13g2000cwo.googlegroups.com>
References: <1140488263.385868.46220@o13g2000cwo.googlegroups.com>
Message-ID: <e437f2f0602220055l24743057l31465db32d99dcae@mail.gmail.com>

you forgot the link :)

http://pamie.sourceforge.net/


From mooquack at suad.org  Fri Feb 17 01:20:13 2006
From: mooquack at suad.org (Kirk McDonald)
Date: Thu, 16 Feb 2006 22:20:13 -0800
Subject: embedding python in HTML
In-Reply-To: <bpCdne1jK5jC1GjeRVn-gw@rcn.net>
References: <GD5Jf.1637$No6.38292@news.tufts.edu>
	<t6q9v1p2qcr0ntsau8i6q5glk89pfb4epq@4ax.com>
	<8n6Jf.1640$No6.38203@news.tufts.edu>
	<43f4f98e$0$16930$636a55ce@news.free.fr>
	<bpCdne1jK5jC1GjeRVn-gw@rcn.net>
Message-ID: <43f569b6$1@nntp0.pdx.net>

John Salerno wrote:
> bruno at modulix wrote:
> 
>> You've got to understand that Python is *not* a 'ServerPage' language
>> (-> php, asp, jsp etc) in itself. Your server can now run python, fine,
>> but *how* ? CGI ? FastCGI ? mod_python ? other ? (hint: it's probably
>> just plain old CGI...)
> 
> 
> So does that mean I need to have something further on the server? Or is 
> this something I can do on my end? How do I find out what I need?

If you really want to use Python as a server page language, mod_python 
has support for Python Server Pages via its PSP handler:

Python Server Pages:
http://modpython.org/live/current/doc-html/pyapi-psp.html

PSP handler:
http://modpython.org/live/current/doc-html/hand-psp.html

This of course means your server needs to have mod_python installed and 
configured. (Consult your server administrator.) However, I've always 
found PSP to be somewhat fiddly, and mixing any serious code with the 
HTML text is hardly pretty.

A more common (and bare-metal) approach is CGI. In CGI, a request for a 
page runs a script, the output of which is the HTML page. I think this 
only requires that the server has Python installed, which you have said 
is the case. Python has signifigant standard library support for writing 
CGI.

You should examine Python's standard cgi module:
http://python.org/doc/2.4.2/lib/module-cgi.html
That page also has some nice examples to get you started.

And maybe its Cookie module, if you ever feel like messing with cookies:
http://python.org/doc/2.4.2/lib/module-Cookie.html

Slightly less bare-metal is using mod_python directly (rather than via 
its PSP module). This is probably preferable to plain CGI if mod_python 
is available, as it caches scripts as long as they are not changed. This 
is faster than reading them off the disk every time. By and large, 
mod_python's API replaces (or at least wraps) the standard library's CGI 
support if you go this route. Again, this is only available if your 
server has mod_python installed, which may or may not be the case.


From http  Thu Feb  9 05:31:29 2006
From: http (Paul Rubin)
Date: 09 Feb 2006 02:31:29 -0800
Subject: module with __call__ defined is not callable?
References: <mailman.1580.1139367500.27775.python-list@python.org>
	<pan.2006.02.08.10.21.24.46790@REMOVETHIScyber.com.au>
	<1139394463.255902.168960@f14g2000cwb.googlegroups.com>
	<mailman.1591.1139400885.27775.python-list@python.org>
Message-ID: <7xvevon7r2.fsf@ruckus.brouhaha.com>

Steve Holden <steve at holdenweb.com> writes:
> Right. While we're at it, why don't we make strings callable. Calling
> a string could call the function whose name (in some namespace or
> other) was in the string. 

Making a string subclass callable works fine:

    >>> class f(str):
    ...   def __call__(self): print len(self)
    ...
    >>> z=f('foo')
    >>> z
    'foo'
    >>> z()
    3
    >>>

> Why should a module be callable? What's the advantage? 

I've wanted to be able to say

   import frotz
   x = frotz(23)

instead of having to say "from frotz import frotz" or "x = frotz.frotz(23)".

That kind of cruft pervades code that uses the standard library and
callable modules could clean a lot of it up.  No more random.random,
sha.new, etc.  Just call the module to make an instance of the class
it defines.

> Should we be able to add two modules together, yielding a module
> that contains all the code of both modules? What happens if I
> multiply a module by two - presumably the result should be the same
> as adding a module to itself?  Perhaps we should be able to divide a
> module by a function?

There should be no built-in definitions of those operations but 
if you're a duck-typing believer, it's clear what __add__ etc. should do.


From dlp at itasoftware.com  Thu Feb 23 14:27:34 2006
From: dlp at itasoftware.com (dlp at itasoftware.com)
Date: 23 Feb 2006 11:27:34 -0800
Subject: Python vs. Lisp -- please explain
In-Reply-To: <7xk6bp4k90.fsf@ruckus.brouhaha.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<pan.2006.02.19.08.00.50.166399@REMOVETHIScyber.com.au>
	<7xk6bp4k90.fsf@ruckus.brouhaha.com>
Message-ID: <1140722854.552409.48280@j33g2000cwa.googlegroups.com>

> Paul Rubin wrote:
> I think both of you are missing the point of the question, which is
> that Lisp is dynamically typed exactly the way Python is and maps to
> Python almost directly; yet good Lisp implementations are much faster
> than CPython.

But Lisp isn't dynamically typed "exactly the way Python is".  Python
documents ways to manipulate the internals of objects at runtime.  It
is
possible to add, change or delete methods and slots by directly
changing
the hashtable they're stored in.  While CLOS does permit a certain
amount
of runtime redefinition, it is not as completely free wheeling and
unpredicatable.



From deets at nospam.web.de  Fri Feb 24 14:55:16 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 24 Feb 2006 20:55:16 +0100
Subject: PyQt - multiple window instances?
In-Reply-To: <1140809670.338611.258120@i40g2000cwc.googlegroups.com>
References: <1140808598.748272.240790@i39g2000cwa.googlegroups.com>
	<4694jqFa1ahgU1@uni-berlin.de>
	<1140809670.338611.258120@i40g2000cwc.googlegroups.com>
Message-ID: <4696l4F9tk48U1@uni-berlin.de>

gregarican schrieb:
> The window isn't being created as a new class instance or anything.

Yes it is. QWidget() creates a new instance of QWidget.

 > The
> main class is the application main window as a whole and this
> particular window is just part of that class. I have typed data into
> the window, then tried to open up a new window. But when I do the
> window where I have typed data disappears and is replaced by a new
> window that's blank. What's the easiest way to keep a reference to the
> old window?

By putting it into a list for example?


Diez


From mtallen at gmail.com  Mon Feb 13 11:41:25 2006
From: mtallen at gmail.com (mtallen at gmail.com)
Date: 13 Feb 2006 08:41:25 -0800
Subject: Python equivilant to msgbox()
References: <7CQHf.2690$7C3.1780@trnddc08><43efd40a$1_2@newspeer2.tds.net>
	<6WQHf.2700$7C3.2665@trnddc08>
	<dsq6oc$lb8$1@newsreader3.netcologne.de>
Message-ID: <1139848885.900591.44560@g44g2000cwa.googlegroups.com>

Or just do the message box.

>>> import CLR.System.Windows.Forms as Forms
>>> Forms.MessageBox.Show("message goes here", "Window title goes here")

http://www.zope.org/Members/Brian/PythonNet/

In theory this will also work on a linux system with Mono installed



From amorgan at xenon.Stanford.EDU  Tue Feb  7 13:58:27 2006
From: amorgan at xenon.Stanford.EDU (Alan Morgan)
Date: Tue, 7 Feb 2006 10:58:27 -0800 (PST)
Subject: Too Many if Statements?
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
Message-ID: <dsaqkj$jhm$1@xenon.Stanford.EDU>

In article <1139330447.716190.247940 at z14g2000cwz.googlegroups.com>,
slogging_away <hinnc at yahoo.com> wrote:
>Hi - I'm running Python 2.4.2 (#67, Sep 28 2005, 12:41:11) [MSC v.1310
>32 bit (Intel)] on win32, and have a script that makes numerous checks
>on text files, (configuration files), so discrepancies can be reported.
> The script works fine but it appears that I may have hit a wall with
>'if' statements.
>
>Due to the number of checks perfromed by the script on the text files,
>(over 500), there are quite a few 'if' statements in the script, (over
>1150).  It seems that it is at the point that when I add any additional
>'if' statements the script will not run.  No error is produced - it
>just returns to the python prompt much the same as when a successful
>'Check Module' command is selected.  If I delete some other 'if'
>statements the new ones work so it appears that it has hit a limit on
>the number of 'if' statements.  This has stunted any further checks for
>the script to make on the text files.
>
>Hs anyone ever run into this sort of thing?

I generated files with 10000, 25000, and 50000 simple if statements and ran
them.  10000 was okay, 25000 gave a bizarre internal error, and 50000 segfaulted
and died.  My system has plenty of memory and it isn't obvious to me why python
should be so bothered about this.  I'm not sure why I can have 10x the number of
if statements that cause you trouble.  There might be some overall limitation
on the number of statements in a file.

Alan
-- 
Defendit numerus


From kay.schluehr at gmx.net  Wed Feb 22 07:48:57 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 22 Feb 2006 04:48:57 -0800
Subject: Python vs. Lisp -- please explain
In-Reply-To: <pan.2006.02.22.11.35.14.90948@REMOVETHIScyber.com.au>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com> <43fbc788@usenet01.boi.hp.com>
	<87u0ar3gba.fsf@wilson.homeunix.com>
	<pan.2006.02.22.11.35.14.90948@REMOVETHIScyber.com.au>
Message-ID: <1140612537.685150.68330@o13g2000cwo.googlegroups.com>


Steven D'Aprano wrote:

> But over time, as PyPy, Psycho, and other technologies bear fruit, Python
> will speed up, even though it will remain interpreted.

I talked to Richard Emslie recently and he told me that the PyPy team
works on a mechanism to create CPython-extension modules written in
RPython i.e. a statically translateable subset of Python. So even
without dynamic code specialization there will be an optimization path
based on the PyPy toolchain that is amazing. 

Kay



From lists at fabis-site.net  Tue Feb 28 18:30:58 2006
From: lists at fabis-site.net (Fabian Steiner)
Date: Wed, 01 Mar 2006 00:30:58 +0100
Subject: PyQT: QDialog and QMainWindow interacting with each other
In-Reply-To: <44044bd3$0$13795$9b4e6d93@newsread4.arcor-online.net>
References: <dtvtds$mt8$03$1@news.t-online.com>
	<44044bd3$0$13795$9b4e6d93@newsread4.arcor-online.net>
Message-ID: <du2mfg$ooh$01$1@news.t-online.com>

Hi Kai!

Kai Teuber wrote:
  > Hi Fabian,
> 
> override the accept() method and call self.showListViewItems() there.
> But remember to call QDialog.accept() at the end.
> 
> def accept( self ):
>     self.showListViewItems()
>     QDialog.accept( self )


Thank you very much, I got it working :-)

Cheers,
Fabian


From skromta at gmail.com  Tue Feb 14 05:43:29 2006
From: skromta at gmail.com (Kalle Anke)
Date: Tue, 14 Feb 2006 11:43:29 +0100
Subject: Python / Apache / MySQL
References: <1139907519.427789.188760@g14g2000cwa.googlegroups.com>
	<slrndv38ti.7rh.sybrenUSE@schuimige.unrealtower.org>
	<0001HW.C01764D700060858F0407550@news.individual.de>
	<43f1aebb$0$1728$636a55ce@news.free.fr>
Message-ID: <0001HW.C01772E1000952B1F0407550@news.individual.de>

On Tue, 14 Feb 2006 11:19:11 +0100, bruno at modulix wrote
(in article <43f1aebb$0$1728$636a55ce at news.free.fr>):

> The reason is mostly that either you need a real, full-blown, rock-solid
>  RDBMS - which MySQL is definitively not - or you dont - in which case
> SQLite is probably a much more lightweight and agile solution.


Stupid questions (I know very little about databases): 

I always thought that a SQLlite database "belonged" to a single process, can 
a database be used by several processes?

Let's say I would build a small web application that would be used by a small 
number of people/processes and it wouldn't be anything fancy just basic 
"selects". What would be the choice for this?

What about speed? I've always had the impression that while PostgreSQL is 
more complete than MySQL it's also slower.

Sorry, if these are really stupid questions but ...

					jem



From xavier.morel at masklinn.net  Sat Feb 25 15:06:10 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Sat, 25 Feb 2006 21:06:10 +0100
Subject: Pure python implementation of string-like class
In-Reply-To: <1140891600.822510.189140@v46g2000cwv.googlegroups.com>
References: <20060225.102645.74687871.kayama@st.rim.or.jp>
	<mailman.2433.1140880297.27775.python-list@python.org>
	<1140891600.822510.189140@v46g2000cwv.googlegroups.com>
Message-ID: <dtqd37$2he$1@apollon.grec.isp.9tel.net>

Ross Ridge wrote:
> Steve Holden wrote:
>> "Wider than UTF-16" doesn't make sense.
> 
> It makes perfect sense.
> 
>                                                               Ross
> Ridge
> 

Not if you're still within Unicode / Universal Character Set code space. 
While UCS-4 technically goes beyond any Unicode Transformation Format 
(UTF-7, 8, 16 and 32 stop at 10FFFF) it also goes beyond the range of 
the UCS itself (0-10FFFF). UTF-32 is the limitation of UCS-4 to the 
Unicode standard.

While it could be argued that Unicode/UCS limit of 10FFFF was chosen 
_because_ of the limitations of UTF-16, It's probably irrelevant to the 
discussion.


From steve at REMOVETHIScyber.com.au  Tue Feb 14 12:59:02 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Wed, 15 Feb 2006 04:59:02 +1100
Subject: processing limitation in Python
References: <1139935358.128826.58660@g14g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.14.17.59.01.993689@REMOVETHIScyber.com.au>

On Tue, 14 Feb 2006 08:42:38 -0800, pdr14 at comcast.net wrote:

> If I un-comment any line in this program below the line where I
> commented " all OK up to this point " This program locks up my
> computer.

It locks up the operating system as well? Shame on Windows.

What happens if you type ctrl-C to interrupt the processing?


> I'm just wondering if any one else has noticed any problems with
> working with large numbers in Python ind if there is anything that can
> work around this issue.

Yes, you need a better algorithm.

You can prove to yourself that it isn't a problem with Python handling big
numbers by running this simple test:

factor(100000000000000000)

and watch how quickly it completes -- a fraction of a second. The problem
is that your test data have few factors, and so your function spends a
LONG time increasing d by one each iteration. Worst case, if your number
is a prime, it has to try to divide against *every* number, 2, 3, 4, ...
all the way up to the prime itself. This takes a LONG time if the number
is very large.

Some improvements you might like to try:

You have to check for factors of two. But after you have done that, you
are just wasting time to check for factors of 4, 6, 8, ... because they
can't possibly be factors. Pull the factor of two test out of the loop,
then start the test with d = 3 and increase by two instead of one.

You can stop looking for factors once you have reached the square root of
the original number. The square root is the biggest possible factor.

There are other improvements you can make, but they make the code more
complicated. Just these few things will give you a HUGE performance boost:

def factor(n):
    factors = []
    while n % 2 == 0:
        factors.append(2)
        n = n/2
    d = 3
    mx = int(n**0.5)
    while (n > 1) and (d <= mx):
        if n % d:
            d = d+2
        else:
            factors.append(d)
            n = n/d
    if n != 1:
        factors.append(n)
    return factors


Using this new improved version, I get this calculation in about two
seconds:

>>> factor(12345678987654)
[2, 3, 2057613164609L]

and this in less than a second:

>>> factor(12345678987654321)
[3, 3, 3, 3, 37, 37, 333667, 333667]



-- 
Steven.



From eoinrogers at gmail.com  Sun Feb 12 14:55:04 2006
From: eoinrogers at gmail.com (Byte)
Date: 12 Feb 2006 11:55:04 -0800
Subject: Small newbie question
Message-ID: <1139774104.070375.235480@z14g2000cwz.googlegroups.com>

How would I do this: Write a program that simply outputs a ramdom (in
this case) name of (for this example) a Linux distibution. Heres the
code ive tryed:

from random import uniform
from time import sleep

x = 2
while x < 5:
    x = uniform(1, 5)
    if x >= 1 <= 1.999: print 'SuSE'
    elif x >= 2 <= 2.999: print 'Ubuntu'
    elif x >= 3 <= 3.999: print 'Mandriva'
    elif x >= 4 <= 4.999: print 'Fedora'
    sleep(2)

It dosnt work: only keep printing SuSE. Please help,

Thanks in advance,
 -- /usr/bin/byte



From fakeaddress at nowhere.org  Thu Feb 16 08:45:28 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Thu, 16 Feb 2006 13:45:28 GMT
Subject: Databases and python
In-Reply-To: <pan.2006.02.14.08.06.18.754312@dcs.nac.uci.edu>
References: <pan.2006.02.14.08.06.18.754312@dcs.nac.uci.edu>
Message-ID: <Yl%If.13638$2O6.13570@newssvr12.news.prodigy.com>

Dan Stromberg wrote:
> I've been putting a little bit of time into a file indexing engine
[...]

> So far, I've been taking the approach of using a single-table database
> like gdbm or dbhash [...] and making each entry keyed by
> a word, and under the word in the database is a null terminated list of
> filenames (in http://dcs.nac.uci.edu/~strombrg/base255.html representation).
> 
[...]
> the program just isn't performing like I'd like it to.
 >
> And I think it's because despite the caching and minimal representation
> conversion, it's still just too slow converting linear lists to arrays
> back and forth and back and forth.

I think I follow. The straightforward method of building the
list of files associated with a word is order n**2 time. On each
new entry, you look up the entire string, append one file-id to
it, and write the new version back.

> So this leads me to wonder - is there a python database interface that
> would allow me to define a -lot- of tables?  Like, each word becomes a
> table, and then the fields in that table are just the filenames that
> contained that word.  That way adding filenames to a word shouldn't bog
> down much at all.

Well, you could use simple files instead of fancy database tables.

Below is a demo of an alternate technique that uses bsddb B-Trees,
and puts both the word and the file-id in the key. I don't know
how efficient it is for real data, but at least the time won't grow
as Theta(n**2).

--Bryan



import bsddb
import urllib


def add_words_from_file(index, fname, word_iterator):
     """ Pass the open-for-write bsddb B-Tree, a filename, and a list
         (or any interable) of the words in the file.
     """
     fname = urllib.quote_plus(fname)
     s = set()
     for word in word_iterator:
         if word not in s:
             s.update(word)
             key = '%s %s' % (urllib.quote_plus(word), fname)
             index[key] = ''
     index.sync()


def lookup(index, word):
     """ Pass the B-Tree (as built with add_words_from_file) and a
         word to look up. Returns list of files containing the word.
     """
     word = urllib.quote_plus(word)
     fname_list = []
     try:
         current = index.set_location(word)
         while True:
             (key, _) = current
             (w, fname) = key.split()
             if w != word:
                 break
             fname_list.append(urllib.unquote_plus(fname))
             current = index.next()
     except KeyError:
         pass
     return fname_list


def test():
     index = bsddb.btopen('junktest.bdb', 'n')
     data =[
         ('bryfile.txt', 'nor heed the rumble of a distant drum'),
         ('junkfile.txt', 'this is the beast, the beast so sly'),
         ('word file.txt', 'is this the way it always is here in Baltimore')
     ]
     for (fname, text) in data:
         words = text.split()
         add_words_from_file(index, fname, words)

     for word in ['is', 'the', 'heed', 'this', 'way']:
         print '"%s" is in files: %s' % (word, lookup(index, word))

test()


From felipe.lessa at gmail.com  Tue Feb 28 15:34:05 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Tue, 28 Feb 2006 17:34:05 -0300
Subject: Thread Question
In-Reply-To: <1209cbiq1kjbh06@corp.supernews.com>
References: <1141155072.500444.215130@v46g2000cwv.googlegroups.com>
	<1209cbiq1kjbh06@corp.supernews.com>
Message-ID: <1141158845.10021.5.camel@kenshin>

Em Ter, 2006-02-28 ?s 20:24 +0000, Grant Edwards escreveu:
> > I have seen examples that used classes, and other examples
> > that just called one thread start command - when should you
> > use one over another?
> 
> I'm not sure what you mean by "use classes" vs. "calling a
> thread start command".  My example above uses a class
> (threading.Thread) to create a thread object, and then calls
> its start method.

# He meant calling direct vs. subclassing. In your example you called
the Thread class directly, but you could have subclassed it.

# In your case, Edwards, I'd prefer subclassing because then you could
put some states in the class. A (bad) example:

class Foo(Thread):
	def __init__(self):
		Thread.__init__(self)
		self.alive = False
		self.running = True

	def run(self):
		while self.running:
			self.alive = ping('myhost')
			sleep(10)
	
	def stop(self):
		self.running = False

# Then you could:

a = Foo()
do_something()
print a.alive
do_something_more()
print a.alive
finish_everything()
print a.alive
a.stop()
# quit

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From eric.nieuwland at xs4all.nl  Wed Feb  1 11:57:55 2006
From: eric.nieuwland at xs4all.nl (Eric Nieuwland)
Date: Wed, 1 Feb 2006 17:57:55 +0100
Subject: python printout format
In-Reply-To: <20060201163626.ABFA21589B@net.tamu.edu>
References: <20060201163626.ABFA21589B@net.tamu.edu>
Message-ID: <822fa78e877efd7ec8efc2e45336ba40@xs4all.nl>

Yong,

Are you sure you indent with the same characters and there is no 
non-print code there?

--eric

On 1 feb 2006, at 17:36, Yong Wang wrote:

> Hi,
>    I have a data set like row = [[1,2,3,4,5], [6,7,8,9,10], 
> [11,12,13,14,15]]
>    when I use loop to print out data, I got compile error in printout 
> statment.
>    while j<24:
>        print ' ',string.ljust(str(units[0]), 5),
>        print ' ',string.ljust(str(ports[j], 3),
>        print ' ',string.ljust(PortlinkbeatInv[row[j][0]],14),
>        print ' ',string.ljust(PortStatusInv[row[j][1]], 19),
>        print ' ',string.ljust(PortTestResultInv[row[j][2]],17),
>        print ' ',string.ljust(PortVisualInv[row[j][3]],19),
>        print ' ',string.ljust(PortAddrVioInv[row[j][4]],15)
>        j=j+1
>     misc.doPg('Port status listing on ' + tag + ' (Page %d):',
>                       vals,doBanner,doRow)
>
>    Error messages are:
> python -c "import compileall; compileall.compile_dir('.',0)"
> Listing . ...
> Compiling ./Ciscoports.py ...
>   File "./Ciscoports.py", line 753
>     print string.ljust(PortlinkbeatInv[row[j][0]],14),
>         ^
> SyntaxError: invalid syntax
>
>
>    How should I change to printout row data [1,2,3,4,5] in one row in 
> assigned format?
>    Many thanks,
>
>     Yong
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list
>



From steve at holdenweb.com  Thu Feb 16 00:21:13 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 16 Feb 2006 00:21:13 -0500
Subject: mapping functions and lambda
In-Reply-To: <dt115g$t2n$2@home.itg.ti.com>
References: <dt1118$t2n$1@home.itg.ti.com> <dt115g$t2n$2@home.itg.ti.com>
Message-ID: <dt1244$1ob$1@sea.gmane.org>

Suresh Jeevanandam wrote:
> I got it:
> dict([k.split('=') for k in s.split(',')])
> 
> Suresh Jeevanandam wrote:
> 
>>Given a string
>>s = 'a=1,b=2'
>>
>>I want to create a dictionary {'a': '1', 'b': '2'}
>>
>>I did,
>>
>>dict(map(lambda k: k.split('='), s.split(',')))
>>
>>Is it possible to get rid of the lambda here, without having to define 
>>another function just for this.
>>
>>Is this the easiest/straight-forward way to do this?
>>

In Python 2.4 you don't even need to construct the list, you can just 
use a generator expression instead:

dict(k.split('=') for k in s.split(','))

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From john_sips_teaz at yahooz.com  Fri Feb  3 22:43:02 2006
From: john_sips_teaz at yahooz.com (John M. Gabriele)
Date: Fri, 03 Feb 2006 22:43:02 -0500
Subject: fairly large webapp: from Java to Python. experiences?
In-Reply-To: <1139018653.508049.182020@g43g2000cwa.googlegroups.com>
References: <1139005746.363918.267370@g47g2000cwa.googlegroups.com>
	<1139018653.508049.182020@g43g2000cwa.googlegroups.com>
Message-ID: <prVEf.7358$MF1.4951@fe08.lga>

brianhray at gmail.com wrote:
> To replace a large framework you will probably need a framework.

Well, I'm sure not all web frameworks are created equal, however,
CherryPy does bill itself as a "web framework".

> Take a
> look at http://www.djangoproject.com or http://www.turbogears.org. They
> both use some of the tools you mention but operate on a higher level.

Django looks interesting to me. Would like to try out mod_python.
Taking a look...

> I find Python fairly easy to maintain. Unfortunatly, I do not find it
> easy to take a bunch of Java code and move it to Python.

Well, I figured it might be better to use the previous webapp
as a *model* to learn from, rather than to directly translate
code from Java to Python.

> But once it is
> there, Python is a good choice for web apps. Java is slow

Slow? They're both dynamic languages, but Java is statically
typed (with less work to do at runtime). For long-running processes,
I'd guess that Java bytecode executes faster than Python bytecode.

> and has a big
> footprint.

Yes.

> Python is reasonably nimble and good design choices pay off.
> Plus, you must write many more lines of Java to do what you can in
> Python.

Yup. The main issue with the current Java webapp seems to be
that it takes a long time to make changes/additions.

> I do not know the code you are not working with, but a lot of
> large Java apps can be poorly written.

I've found that good documentation is *most* critical. At least
if the docs are good, but the code needs work, you have some
direction as to how to fix the code. If there's no docs, you
spend hours wondering why things are done the way they're done.

Currently having a look at the Django docs. :)

Thanks Brian!
---J
-- 
(remove zeez if demunging email address)


From martin.witte at gmail.com  Thu Feb 23 09:53:44 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 23 Feb 2006 06:53:44 -0800
Subject: Get Root access in Linux?
In-Reply-To: <1140704577.336961.286700@u72g2000cwu.googlegroups.com>
References: <1140698762.654497.272490@o13g2000cwo.googlegroups.com>
	<465qp8F9hujdU1@uni-berlin.de>
	<1140702432.302564.104270@g14g2000cwa.googlegroups.com>
	<1140704577.336961.286700@u72g2000cwu.googlegroups.com>
Message-ID: <1140706424.592696.48760@t39g2000cwt.googlegroups.com>

Then you have root access in that shell only, and not in the 'mother'
python process. I guess Harlins suggestion is the nest: run with sudo



From onurb at xiludom.gro  Mon Feb  6 11:00:50 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Mon, 06 Feb 2006 17:00:50 +0100
Subject: Regular expression query
In-Reply-To: <Br_Ef.76685$eD5.1296510@twister2.libero.it>
References: <1138976443.473320.315170@g44g2000cwa.googlegroups.com>
	<Br_Ef.76685$eD5.1296510@twister2.libero.it>
Message-ID: <43e772ca$0$572$626a14ce@news.free.fr>

Giovanni Bajo wrote:
> Martin Biddiscombe wrote:
> 
> 
>>"parameter=12ab"
>>"parameter=12ab foo bar"
>>"parameter='12ab'"
>>"parameter='12ab' biz boz"
>>"parameter="12ab""
>>"parameter="12ab" junk"
> 
> 
>>>>import shlex
>>>>def extract(s):
> 
> ...     s = s.split("=")[1]
> ...     s = shlex.split(s)[0]
> ...     return s

I definitevely have to learn and use the shlex module.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From daniel.dittmar at sap.corp  Fri Feb 17 06:52:48 2006
From: daniel.dittmar at sap.corp (Daniel Dittmar)
Date: Fri, 17 Feb 2006 12:52:48 +0100
Subject: Add a month
In-Reply-To: <mailman.2046.1140175284.27775.python-list@python.org>
References: <1140173540.686250.205760@g44g2000cwa.googlegroups.com>
	<mailman.2046.1140175284.27775.python-list@python.org>
Message-ID: <dt4deg$l3g$1@news.sap-ag.de>

Fredrik Lundh wrote:
> novin01 at gmail.comn wrote:
> 
>> Hi, this is probably a really simple question but...
>> How do you add a month to a datetime date in python? It would be nice
>> if  you could do something like:
>>
>> d = datetime.date(2006,2,17)
>> dm = datetime.timedelta(months=1)
>> d_new = d + dm
>>
>> but timedelta doesn't have a 'months' setting. Am I missing some easy
>> method or do I have to code a work around myself??
> 
> what do you expect d_new to be after the operation ?  if the answer
> is date(2006,3,17), what's date(2006,1,31) plus one month?

Traceback (most recent call last):
   File "<stdin>", line 1, in ?
ValueError: date domain error

in analogy to math.sqrt (-2)

Daniel


From fredrik at pythonware.com  Wed Feb 15 09:48:14 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 15 Feb 2006 15:48:14 +0100
Subject: file existence checking
References: <20060215143334.40944.qmail@web36713.mail.mud.yahoo.com>
Message-ID: <dsvevf$htf$1@sea.gmane.org>

"john peter" <neuzhoundxx at yahoo.com> wrote:
> does anyone have a suggestion on simplest way to check for the existence of a file
>   within the same directory where a python script was started without really opening
>   it?

it's not like opening a file is a very expensive or dangerous operation, but
you can use

    import os

    if os.path.isfile(filename):
        print "a file named", filename, "exists"

or

    if os.path.exists(filename):
        print "something named", filename, "exists"

to check for a file.  however, if you plan to open the file later on, it's better
to just open it, and deal with the exception; e.g.

    try:
        f = open(filename)
    except IOError:
        print "failed to open", filename
        sys.exit(1)

    data = f.read(100)

</F>





From aleaxit at yahoo.com  Thu Feb 16 10:40:51 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Thu, 16 Feb 2006 07:40:51 -0800
Subject: looping over more than one list
References: <1140102047.341803.10400@g44g2000cwa.googlegroups.com>
Message-ID: <1haucy3.yogp861ccmea0N%aleaxit@yahoo.com>

Iain King <iainking at gmail.com> wrote:
   ...
> This works:
> 
> def lowest(s1,s2):
>     s = ""
>     for c1,c2 in [x for x in zip(s1,s2)]:
>         s += lowerChar(c1,c2)
>     return s
> 
> but it's hardly any more elegant than using a loop counter, and I'm
> guessing it's performance is a lot worse - I assume that the zip
> operation is extra work?

1. [x for x in whateverlist]   just doesn't make sense!  If you need a
copy of whateverlist, just use list(whateverlist).  When you don't need
a copy, like here, just use whateverlist.  I.e., loop this way:

  for c1, c2 in zip(s1, s2):

2. performance is destroyed by building up a big list with a += of many
small pieces.  Use cStringIO (some people prefer it for style reasons)
or (what most people do) ''.join a list where you've accumulated the
results.

3. this case is ideal for build-in function map.

The body of the function could be just one statement:

  return ''.join(map(lowerChar, s1, s2))

This probably gives best performance.

Also consider a genexp and avoiding the unpacking/repacking a la:

  return ''.join(lowerChar(*cs) for cs in zip(s1, s2))

or better:

import itertools

and then

  return ''.join(lowerChar(*cs) for cs in itertools.izip(s1, s2))

or

  return ''.join(itertools.imap(lowerChar, s1, s2))

If you care about performance, use module timeit from the standard
library to measure cases of interest.

If you don't (not especially) then the first solution looks neat,
elegant, readable, and concise.

But never build up substantial strings with a loop of += of small
strings: that's O(N squared) and will MAKE you care about performance
even where you otherwise wouldn't!-)


Alex


From rob at digital-crocus.com  Wed Feb  8 08:50:16 2006
From: rob at digital-crocus.com (Robin Haswell)
Date: Wed, 08 Feb 2006 13:50:16 +0000
Subject: Python threading, and processes
References: <pan.2006.02.08.13.18.20.728051@digital-crocus.com>
	<44u9pgF41dv5U1@uni-berlin.de>
Message-ID: <pan.2006.02.08.13.50.16.898625@digital-crocus.com>

On Wed, 08 Feb 2006 14:24:38 +0100, Diez B. Roggisch wrote:

> Robin Haswell wrote:
> 
>> Hey there
>> 
>> I'm doing some threading in python with Python 2.3 and 2.4 on Ubuntu and
>> Debian machines, and I've noticed that if I open a lot of threads (say,
>> 50), I get lots of python processes with individual PIDs, which consume a
>> disproportionate amount of CPU. Does this mean that Python is using the
>> dummy_thread module by accident? And is there a realistic limitation to
>> the number of threads I can do?
> 
> Both system-depend. The way threads are shwon depends on the systenm. And a
> thread that runs, runs  - so it consumes cpu-cycles. Try calling
> time.sleep() to see how the consumption decreases.

Cheers for that info. The thread's main tasks are getting webpages
(spidering), the actual amount of processing done in each thread is
minimal - that's why I'm confused by the CPU usage.

Cheers

-Rob

> 
> Diez



From erniedude at gmail.com  Mon Feb  6 11:54:42 2006
From: erniedude at gmail.com (Ernesto)
Date: 6 Feb 2006 08:54:42 -0800
Subject: read file problem
In-Reply-To: <1139239797.811569.253010@g43g2000cwa.googlegroups.com>
References: <1139239797.811569.253010@g43g2000cwa.googlegroups.com>
Message-ID: <1139244882.673669.248750@z14g2000cwz.googlegroups.com>

Thanks to all.



From jcdentonmail at yahoo-dot-de.no-spam.invalid  Thu Feb 23 04:33:21 2006
From: jcdentonmail at yahoo-dot-de.no-spam.invalid (JCDenton)
Date: 23 Feb 2006 09:33:21 GMT
Subject: mascyma
Message-ID: <43fd8161$0$47965$892e7fe2@authen.yellow.readfreenews.net>

Hi,

I found this interface 

 http://home.arcor.de/mulk/projects/mascyma/download.xhtml.en

I am actually have troubles to get it working. Some warnings and
errors occur when I try to start it. If anybody will have a look on
it na dget in running with python 2.4, please let me know.

I think it is a promising project and may be there will be an
interface for Yacas in Python one day? 

Thanks, 
JC

 :D



From pydecker at gmail.com  Mon Feb 20 09:16:44 2006
From: pydecker at gmail.com (Peter Decker)
Date: Mon, 20 Feb 2006 09:16:44 -0500
Subject: Komodo - Will it Lock Me In?
In-Reply-To: <yEncExpress_Rulz!_www.techsono.com_3223251148@firstva.com>
References: <yEncExpress_Rulz!_www.techsono.com_3223251148@firstva.com>
Message-ID: <ca55a9900602200616q7a59207bgba6a73a682fba617@mail.gmail.com>

On 2/19/06, Matt at bag.python.org <Matt at bag.python.org> wrote:

> Yes, I have Dabo installed on my system. I made a small test app, but was
> unable to deploy it. I was getting an error from py2exe, I think, about how my
> wxPython installation was not correct. This is the kind of thing I am talking
> about. If Dabo were an integrated system, I wouldn't have to spend many days
> struggling to install package after package and then get them all to play nice
> with each other.

Dabo is an open source package written by two guys in their spare
time. I'm not surprised that there might still be some loose ends,
especially with integrating with external packages.

Did you post a message to their list explaining the problem? Just last
week someone found a problem building with py2exe, and Paul, one of
the authors, identified the problem (py2exe wasn't 'finding' a library
that it should have), and had a fix posted within a couple of hours.

> Having said that, I will continue to struggle and like Dabo as the best option
> so far.

Good to hear! And don't struggle too much without posting a message
about your problem on the Dabo lists, or on their issue tracker
(http://dabodev.com/tracker). I've never worked with a more helpful
team than with the Dabo folks.

--

# p.d.


From jgardner at jonathangardner.net  Mon Feb 27 19:46:25 2006
From: jgardner at jonathangardner.net (Jonathan Gardner)
Date: 27 Feb 2006 16:46:25 -0800
Subject: type = "instance" instead of "dict"
In-Reply-To: <1141081177.003471.139820@t39g2000cwt.googlegroups.com>
References: <1141069989.763239.191140@u72g2000cwu.googlegroups.com>
	<44035966$1_2@newspeer2.tds.net>
	<1141072746.685948.251040@j33g2000cwa.googlegroups.com>
	<440370ce$1_2@newspeer2.tds.net>
	<1141081177.003471.139820@t39g2000cwt.googlegroups.com>
Message-ID: <1141087585.910134.17650@j33g2000cwa.googlegroups.com>

You should probably spend a bit more time in the documentation reading
things for yourself. Read
http://www.python.org/doc/2.4.2/ref/types.html under "Class Instances"
for your answer.



From jjcassidy at gmail.com  Fri Feb 24 14:13:55 2006
From: jjcassidy at gmail.com (jjcassidy at gmail.com)
Date: 24 Feb 2006 11:13:55 -0800
Subject: Playing with modules
Message-ID: <1140808435.311458.86770@z34g2000cwc.googlegroups.com>

I know that this is not particularly "pythonic", but I would like to
mess with modules a bit.

I would like to develop a modular module which allows different
services to plug themselves into the module and become the
implementation for a named module.

Say I have a suite of "cassidy.blah.blah.blah...." modules. As it's not
really my intention to brand everything, I want to remap all these
modules as "home....". Thus if someone (eventually) likes my code for
x, but does not want the whole cassidy avalanche, and just wants
something simple to do home.x, they can provide their own
implementation or create a wrapper class to existing functionality
which does the work.

My problem is that this code fails all the time that I have tried to do
this.

import home.base

Does anybody know of a way to "fool" python into thinking that my suite
is actually this neutrally named suite called "home"? 

Thanks, 

John



From aahz at pythoncraft.com  Tue Feb 28 21:00:37 2006
From: aahz at pythoncraft.com (Aahz)
Date: 28 Feb 2006 18:00:37 -0800
Subject: SyntaxError: can't assign to a function call
References: <1140997057.610226.101220@u72g2000cwu.googlegroups.com>
	<1hbdijm.3cc1cz15xqd64N%aleaxit@yahoo.com>
	<1140998338.081756.313040@j33g2000cwa.googlegroups.com>
	<on65021qdcolmvuj0ammt58k35ok14qq46@4ax.com>
Message-ID: <du2v85$774$1@panix2.panix.com>

In article <on65021qdcolmvuj0ammt58k35ok14qq46 at 4ax.com>,
Tim Roberts  <timr at probo.com> wrote:
>
>One thing that can be helpful in situations like this is to remember that
>+= in Python isn't quite as "special" as it is in C.  So,
>
>  f() += [4]
>
>is the same as
>
>  f() = f() + [4]
>
>and I think you can see why that is a problem.

Actually, it's not quite the same as the expansion, either:

>>> a=[1]
>>> b=a
>>> a+=[2]
>>> a is b
1
>>> a = a + [3]
>>> a is b
0
>>> a
[1, 2, 3]
>>> b
[1, 2]
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"19. A language that doesn't affect the way you think about programming,
is not worth knowing."  --Alan Perlis


From cretin at des.alpes.ch  Sat Feb 11 09:39:12 2006
From: cretin at des.alpes.ch (morris carre)
Date: Sat, 11 Feb 2006 15:39:12 +0100
Subject: encoding problems with pymssql / win
In-Reply-To: <43edf3e5$1_3@news.bluewin.ch>
References: <43edf3e5$1_3@news.bluewin.ch>
Message-ID: <43edf45e$1_3@news.bluewin.ch>

> (to email use "boris at batiment71 dot ch")

oops, that's "boris at batiment71 dot net"


From john at castleamber.com  Wed Feb 15 14:47:10 2006
From: john at castleamber.com (John Bokma)
Date: 15 Feb 2006 19:47:10 GMT
Subject: Xah's Edu Corner: accountability & lying thru the teeth
References: <1134780763.066592.45390@g49g2000cwa.googlegroups.com>
	<1135405908.381150.133190@o13g2000cwo.googlegroups.com>
	<1136236586.734775.212440@f14g2000cwb.googlegroups.com>
	<1137784561.589887.58380@o13g2000cwo.googlegroups.com>
	<1139909629.798938.284160@g47g2000cwa.googlegroups.com>
	<45dmspF66tepU1@individual.net>
	<r9uIf.8084$lG2.2039@news-wrt-01.rdc-nyc.rr.com>
	<n5t4v1tme5eaa5jmhfpqusd85ajfpliunh@4ax.com>
	<9vyIf.8103$lG2.7704@news-wrt-01.rdc-nyc.rr.com>
	<2dv6v1hv6914bbfc4a508pkbjf8d2csgkg@4ax.com>
Message-ID: <Xns976B8C3B51B2castleamber@130.133.1.4>

Al Balmer <albalmer at att.net> wrote:

> have for a long time, and I can understand that it would be better if
> everyone filtered or ignored him,

The best would be if everybody instead of posting replies would complain 
to his ISP and Usenet provider. Xah is a major and offensive troll. Those 
only stop when you make their accounts go faster then they can find new 
ones. I know people who have wasted quite some money, each time more and 
more to keep on trolling. In the end, some see how much it's going to cost 
to post just another message or they end up in a cancelbot or 2, and are 
kicked off some major news servers.

-- 
John                   Small Perl scripts: http://johnbokma.com/perl/
               Perl programmer available:     http://castleamber.com/
                                        I ploink googlegroups.com :-)
                        


From davidworley at gmail.com  Sun Feb  5 13:30:28 2006
From: davidworley at gmail.com (Dave)
Date: 5 Feb 2006 10:30:28 -0800
Subject: translating PHP to Python
Message-ID: <1139164228.608430.13120@g44g2000cwa.googlegroups.com>

Anyone familiar with PHP? I'm trying to make a translation. In PHP you
can get the current object's name by going like this:

get_class(item) == 'ClassName'

I've tried type(item), but since I can't be sure if I'll be in __main__
or as a child object, I can't guarantee what that value will return, so
I can't just manipulate that value as a string.

Is there a simple way to get the current object's name? You would think
__name__ would work, right? It doesn't.

Now here's  another, similar one:

You can reference an object's parent object directly in PHP, like so:

//note the charming use of semi-colon. isn't it cute?
parent::__construct(
$stuffInAWeirdSyntaxThatDoesntMeanAnythingWhenYouReadIt);

I'd like to avoid passing a reference to an object's parent in
__init__, but is there a built in way in Python to say "You, Parent
Object, do ...stuff!"

Thanks!



From peterbe at gmail.com  Thu Feb 23 12:37:25 2006
From: peterbe at gmail.com (peterbe at gmail.com)
Date: 23 Feb 2006 09:37:25 -0800
Subject: Using ElementTree to tidy up an XML string to my liking
Message-ID: <1140716245.381730.285310@j33g2000cwa.googlegroups.com>

I have an XML string coming in from one system that I'd like to tidy up
and return in a very particular format. I'm picky!

If the input is
<SOMETHING   attr1="foo1"
       attr2='foo2'   >

Then the output must be
<something
   attr1="foo1"
   attr2="foo2">

The file might have comments and namespaces and all of this should be
preserved as it was when it came in.

I was hoping to use ElementTree which can parse my input so that I rest
on solid foundations instead of mad regular expressions and string
manipulation.
But, if mad regular expressions and string manipulations is what it
takes I'll have to settle on that. 

What are my options?



From jf.ff at mail.com  Mon Feb 20 11:58:51 2006
From: jf.ff at mail.com (jf.ff at mail.com)
Date: 20 Feb 2006 08:58:51 -0800
Subject: Python solutions for old Police software?
Message-ID: <1140454731.103842.221860@g14g2000cwa.googlegroups.com>

http://www.cityfremontof.com



From reply.in.the.newsgroup at my.address.is.invalid  Mon Feb  6 12:15:39 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Mon, 06 Feb 2006 18:15:39 +0100
Subject: * 'struct-like' list *
References: <1139245389.529742.317110@g43g2000cwa.googlegroups.com>
Message-ID: <sq0fu1hunachlmguv8mol1ii70a4k6cqbf@4ax.com>

Ernesto:
>1.  How to search for the keywords "Name:", "Age:", etc. in the file...

You could use regular expression matching:
http://www.python.org/doc/lib/module-re.html

Or plain string searches:
http://www.python.org/dev/doc/devel/lib/string-methods.html

>2.  How to implement some organized "list of lists" for the data
>structure.

You could make it a list of bunches, for example:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52308

Or a list of objects of your custom class.

-- 
Ren? Pijlman


From bdesth.quelquechose at free.quelquepart.fr  Sun Feb 12 11:29:13 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 12 Feb 2006 17:29:13 +0100
Subject: is there a better way?
In-Reply-To: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
Message-ID: <43ef43b3$0$284$626a14ce@news.free.fr>

markscala at gmail.com a ?crit :
> Problem:
> 
> You have a list of unknown length,

This doesn't exist in Python:
   len(alist)

> such as this: list =
> [X,X,X,O,O,O,O].  You want to extract all and only the X's.

braindead solution - relying on zeros being zeros or any other False value:
all_xxx = filter(None, [X,X,X,O,O,O,O])

>  You know
> the X's are all up front and you know that the item after the last X is
> an O, or that the list ends with an X.  There are never O's between
> X's.
> 

Then it *may* be possible to optimize - but code will break as soon as 
this rule change. So is there a real need for optimisation ? (hint: dont 
guess, profile)


FWIW, I've collected all suggestions here (and perhaps some others) and 
hacked a Q&D benchmark. Usage is:

python test_lists.py [repeat [list_size [xcount]]

where:
* repeat is the number of iteration, default to 1000
* list_size is the size of the list, default to 100
* xcount is the number or non-zero values in the list, default is random

I've run it a few times, and it seems that in most cases,
  *  the bisect-like approach (Alex Martelli / Karl Friedrich Bolz) is 
the winner
  * the while/pop approach of the OP (slightly rewritten...) is really wrong

FWIW, one of the dummiest possible approach IMHO
(ie filter(None, alist)) behaves quite correctly wrt some other 
'optimized' approachs - and is still safe if the rules about the 
composition of the list changes... Could it be that no optimization is 
sometime the best optimisation ?-)


# test_lists.py
from itertools import takewhile
from timeit import Timer
from random import randint

def get_list(size, xcount=None):
     if xcount is None:
         xcount = randint(1, size)
     else:
         assert xcount <= size
     zcount = size - xcount
     return [1] * xcount + [0] * zcount

def with_while(alist):
     res = []
     while alist and alist[0]:
         res.append(alist.pop(0))
     return res

def with_for(alist):
     res = []
     for x in alist:
         if not x: break
         res.append(x)
     return res

def with_filter(alist):
     return filter(None, alist)

def with_comprehension(alist):
     return [x for x in alist if x]

def with_takewhile(alist):
     return list(takewhile(lambda x: x!=0, alist))

def with_slice_try(alist):
     try:
         return alist[:alist.index(0)]
     except ValueError:
         return alist[:]

def with_slice_safe(alist):
     alist.append(0)
     return alist[:alist.index(0)]

def with_delslice_safe(alist):
     alist.append(0)
     del alist[alist.index(0):]
     return alist

def with_sect(alist):
     low = 0
     high = len(alist)
     while low < high:
         mid = (low + high) // 2
         if alist[mid] == 0:
             high = mid
         else:
             low = mid + 1
     return alist[:low]

_candidates = [n for n, o  in locals().copy().items() \
                if n.startswith('with_') and callable(o)]

def run_test(repeat=1000, list_size='100', xcount='None'):
     global _candidate

     print """
params :
  * repeat : %s
  * list_size : %s
  * xcounts : %s
"""  % (repeat, list_size, xcount)
     results = {}
     for n in _candidates:
         stm, stp = ('%s(get_list(%s, %s))' % (n, list_size, xcount),
                     'from __main__ import %s, get_list' % n)
         results[n] =  Timer(stm, stp).timeit(repeat)

     sorted_results = sorted([(time, (n, time)) \
                               for n, time in results.items()])
     for _, result in sorted_results:
         print "%s : %s" % result


def main(args):
     try:
         repeat = int(args.pop(0))
     except:
         repeat = 1000
     try:
         list_size = args.pop(0)
     except:
         list_size = '100'
     try:
         xcount = args.pop(0)
     except:
         xcount = 'None' # -> random

     run_test(repeat, list_size, xcount)

if __name__ == '__main__':
     import sys
     main(sys.argv[1:])


HTH


From http  Wed Feb  1 20:27:36 2006
From: http (Paul Rubin)
Date: 01 Feb 2006 17:27:36 -0800
Subject: cgi - secure sessions
References: <1138842390.012855.107610@g44g2000cwa.googlegroups.com>
Message-ID: <7x8xsuczxz.fsf@ruckus.brouhaha.com>

infini.g at gmail.com writes:
> I was just wondering if / how would it be possible to create secure
> sessions for a website using Python CGI... I thought of using cookies,
> and things looked promising for a while; I could login through a form
> which pointed to a cgi script which created sent the user cookies,

Yes, that's the usual way: send a cookie containing either the session
ID or the session data, and read it back on the server side.  Be very
careful about what you put in the cookie: if it's a session ID, it
should be a long random string, not a session number like 37 (if you
use consecutive numbers, someone can change their number and take over
someone else's session).  If it's more complex session data, validate
it carefully on the server side, maybe by authenticating it with
something like the hmac module.


From jjl at pobox.com  Sat Feb  4 19:27:31 2006
From: jjl at pobox.com (John J. Lee)
Date: Sun, 05 Feb 2006 00:27:31 GMT
Subject: Python vs C for a mail server
References: <mailman.3994.1138546139.27774.python-list@python.org>
	<mailman.1197.1138549204.27775.python-list@python.org>
	<1138728303.669646.36940@g49g2000cwa.googlegroups.com>
	<drqa42$8k8$1@wake.carmen.se>
	<1138805854.533303.279610@g49g2000cwa.googlegroups.com>
	<drt2t8$h4j$1@wake.carmen.se>
	<1138894326.142420.158350@f14g2000cwb.googlegroups.com>
Message-ID: <87slqyr6ob.fsf@pobox.com>

"Randall Parker" <techiepundit at futurepundit.com> writes:
[...]
> The code I'm writing in Python is a test executive to test embedded C
> code. Then tests get written in Python that the test executive
> processes. No, I'm not going to write yet another layer of tests in
> order to compensate for shortcomings in the Python language.

Yeah, despite being a fan of test-first, I don't write tests for tests
either.  That has been true when I've been testing numerical code
written in both C and Python, for example.  If I were writing any sort
of test infrastructure code, however tiny, I would write tests for
that code, regardless of the language.  For those reasons, I don't see
writing tests as compensating for shortcomings of Python.

This discussion reminds me of statistics books that claimed that, just
as a measurement without an error estimate was meaningless, so an
error estimate without its own error estimate was also meaningless.
By that logic, seems all measurement is meaningless :-) (please
everybody note this is meant as a mildly amusing aside, not a point of
argument!)


> > It's also a pain to write unit tests, but it's much more rewarding
> > than writing type declarations. Not only does it force you to think
> > through the ramifications of changes, but you also document your
> > intentions through your tests.
> 
> I do not have time to write unit tests for the Python classes. I  have
> plenty of unit tests to write in Python for the embedded C modules.
> When I run and hit a problem in Python I just  debug it and fix it.
> That's a lot faster than writing unit tests.

As somebody who has worked in both test-first and 'a smattering of
tests' styles, I'm quite sure you're right: when you don't have lots
of unit tests, writing them slows you down.  The benefit to be had
comes when making *changes* to code with *good* unit test coverage.
We all know people whose 'pragmatism' sometimes operates on, um, a
strictly local basis and neglects the impact on a wider scale.  I
think we usually fall into that trap when we fail to write unit tests.

I'm open to the idea that the benefits depend heavily on the sort of
code you're writing, though.


John


From kent at kentsjohnson.com  Sat Feb 11 08:28:01 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Sat, 11 Feb 2006 08:28:01 -0500
Subject: Jython inherit from Java class
In-Reply-To: <1139647012.317095.4240@g44g2000cwa.googlegroups.com>
References: <1139344211.725580.263660@g47g2000cwa.googlegroups.com>
	<43eab05b_2@newspeer2.tds.net>
	<1139594138.216488.12730@g14g2000cwa.googlegroups.com>
	<1139600759.152551.138440@g14g2000cwa.googlegroups.com>
	<43ecee24_2@newspeer2.tds.net> <dsjm56$cjr$1@reader2.nmix.net>
	<1139647012.317095.4240@g44g2000cwa.googlegroups.com>
Message-ID: <43ede218_1@newspeer2.tds.net>

Mark Fink wrote:
> Please enlighten me. This seemed so easy yust inherit from a Java class
> overwrite one method - done. At the moment I do not know how to proceed
> :-((

It should be easy.

> Jython or jythonc?
> ==================
> In general is it better to run programms with the jython interpreter or
> is it better to compile them first? I had the impression that the
> inheritance does not work with the interpreter. Is that right?

I personally avoid jythonc, I have not had success with it. Others 
apparently have and use it.

Inheritance works fine without jythonc. The limitation in non-compiled 
Jython is in the methods that are visible to Java code. Java code will 
only see methods of a Jython class that are declared in a Java class or 
interface that the Jython class extends or implements.

For example:

Java:

public class Foo {
   public int value() { return 3; }
}

public interface Bar {
   public int anotherValue();
}

Jython:
class Baz(Foo, Bar):
   def value(self): return 5
   def anotherValue(self): return 7
   def somethingCompletelyDifferent(self): return 42

Now, a Java client that has an instance of Baz will be able to call
   baz.value()
   baz.anotherValue()
but
   baz.somethingCompletelyDifferent()
will not be possible even using Java introspection.

OTOH a Jython client will be able to access all three methods of baz.

> 
> 2.1 or 2.2a
> ===========
> The programm did not compile with the 2.1 version and Java 1.5. But
> with 2.2a it compiled but 2.2a is an alpha version. Assuming the
> programm would compile with the Java 1.4 version would it be better
> (saver, more stable, performance) to use 2.1 or 2.2a?

IMO Jython 2.2a1 is not near ready for production use. Jython 2.1 is 
very stable and usable.

> Inherit from java baseclass or reimplement the whole thing in jython?
> =====================================================================
> All the problems with Jython stated when I wanted to inherit from a
> Java baseclass. I wounder if I would have more success when
> implementing it in pure Jython. Regarding the inheritance I had an
> empty wrapper arround the Java baseclass and 70% of the unit test
> passed. But the performance was ~ factor 10 slower than using the base
> class directly. Does this mean that there is overhead with the
> inheritanc construct and that this implementation path would always be
> so slow. On the other hand would a 100% Jython solution be faster?

Inheritance from Java works well and I have never seen performance 
problems like this.

Java JUnit uses introspection to find test methods so it won't find 
methods of a Jython class.

HTH,
Kent


From bearophileHUGS at lycos.com  Thu Feb  2 15:26:09 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 2 Feb 2006 12:26:09 -0800
Subject: A class with built-in doctest feature ?
In-Reply-To: <mailman.1337.1138837858.27775.python-list@python.org>
References: <mailman.1337.1138837858.27775.python-list@python.org>
Message-ID: <1138911969.634271.317170@g44g2000cwa.googlegroups.com>

The idea looks interesting, but you can also design a couple of
functions that scan the docstrings of a given class and its methods to
produce what you need:

doctestAll(C)
toHtml(C)

This is probably simpler and gives similar results.

Bye,
bearophile



From http  Wed Feb  8 16:26:45 2006
From: http (Paul Rubin)
Date: 08 Feb 2006 13:26:45 -0800
Subject: Pulling all n-sized combinations from a list
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>
Message-ID: <7x7j85czje.fsf@ruckus.brouhaha.com>

"Swroteb" <swrittenb at gmail.com> writes:
> Atrocious and slow, I'm sure, but is there a better way?  I can't
> simply create a list with the combinations I want, since it won't fit
> into memory.  And I'm sure I can do it using a standard paradigm using
> five indexed for loops (ie, for i = 1, for j = i+1, for k = j+1, etc.).
>  But is there a really nice way to handle this in Python?

Is this a homework problem?  Hint: 1) use recursion; 2) use generators.


From adamm_n0 at spamm_blic.net  Mon Feb 20 16:57:30 2006
From: adamm_n0 at spamm_blic.net (Mladen Adamovic)
Date: Mon, 20 Feb 2006 22:57:30 +0100
Subject: editor for Python on Linux
In-Reply-To: <1140457900.354733.179780@g43g2000cwa.googlegroups.com>
References: <dtai6e$23m$2@ariane.blic.net><dtcqa0$adv$1@ariane.blic.net>
	<1140457900.354733.179780@g43g2000cwa.googlegroups.com>
Message-ID: <dtddrt$4j8$1@ariane.blic.net>

rainbow.cougar at gmail.com wrote:
> Actually gedit does have syntax highlighting and works quite well.

Uops, it seems that I should give a second chance to it, I haven't 
noticed its settings.

> If you put down emacs so casually you obviously have no experience with
> one of the most powerful text editors available. I don't use because I
> like the X windows editors more.

I know that emacs is powerfull editor but I'm not used to it.

> Basically any editor that can insert spaces for tabs and maintain
> indentation level works well.

jEdit don't maintain indentation level correct (it was my first try) 
then I googled a bit and was confused so I posted a message here :).


-- 
Mladen Adamovic
home page: http://home.blic.net/adamm


From aleaxit at yahoo.com  Sun Feb 12 14:50:02 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 12 Feb 2006 11:50:02 -0800
Subject: ordered sets operations on lists..
References: <mailman.1722.1139590689.27775.python-list@python.org>
	<1139592166.993686.212000@f14g2000cwb.googlegroups.com>
	<1139599834.975607.77180@f14g2000cwb.googlegroups.com>
	<1halbdx.dd0p1l1obawfkN%aleaxit@yahoo.com>
	<43ef8e5f.625119424@news.oz.net>
Message-ID: <1hana3d.1bwbt4c1esela5N%aleaxit@yahoo.com>

Bengt Richter <bokr at oz.net> wrote:
   ...
> >Personally, I'd always use (depending on guesses regarding lengths of
> >lists) [x for x in l1 if x in l2] or the setified equivalent, of course.
> >
> Perhaps newbies should be advised that
> 
>     [x for x in l1 if x in set(l2)]
> 
> is not a (well) setified equivalent? I could see them being tempted.

You mean, newbies should be advised that Python does NOT hoist any
computations whatsoever from the body of a loop (including LCs and
genexps), so if you want anything hoisted you need to hoist it yourself?
Yes, it is a point worth making, since the lack of hoisting is a
frequent cause of performance loss.


Alex


From s323 at mail.ru  Tue Feb 14 07:02:48 2006
From: s323 at mail.ru (Sergey)
Date: Tue, 14 Feb 2006 15:02:48 +0300
Subject: file names longer than MAX_PATH under Windows 2003
References: <dssev8$tr5$1@news.rtcomm.ru>
	<pan.2006.02.14.11.43.48.318400@REMOVETHIScyber.com.au>
Message-ID: <dssgt9$v7s$1@news.rtcomm.ru>


"Steven D'Aprano" <steve at REMOVETHIScyber.com.au> wrote in message news:pan.2006.02.14.11.43.48.318400 at REMOVETHIScyber.com.au...
> f = file("E:/files/.../something.dat", "r")
> Does this help?

backslashes quoted.

>>> print c
\\.\e:\files\xxxxxxxxxxxxxxxx\xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxx\xxxxxxxxxxx xxxxxxxxx
\xxxxxxxxxxxxxxxxxxxxxxx\xxxxxxxxxxxxxx\xxxxxxxxxxxxxxxxxxxxx\xxxxxxxxxxxx
xxxxxxxxxxxxxxx\xxxxxxxxxxxxxxxxxxxxxxxxx\xxxxxxxxxxxxxxxxxxxxxxx\xxxxxx xxxxxxxxxx\xxxxxxxxxxxxxxxxxxxxxxxxxxxx.xls

(cyrillic letters in filename here I replaced with x-es)

>>> file(c,"rb")
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
IOError: [Errno 2] No such file or directory: u'\\\\.\\e:\\files\\\u041f\u0420....filename skipped....\u0442.xls'

>>> win32file.CreateFile(c,win32file.GENERIC_READ,0,None,win32file.OPEN_EXISTING
,0,None)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
pywintypes.error: (206, 'CreateFile', 'The filename or extension is too long.')

When I open explorer, I can browse folder and see this file (but I can do almost nothing with it). It was created through share. 
Ntbackup can work with the file - why Python can't?




From dylan.moreland at gmail.com  Thu Feb 16 10:18:16 2006
From: dylan.moreland at gmail.com (Dylan Moreland)
Date: 16 Feb 2006 07:18:16 -0800
Subject: looping over more than one list
In-Reply-To: <1140102047.341803.10400@g44g2000cwa.googlegroups.com>
References: <1140102047.341803.10400@g44g2000cwa.googlegroups.com>
Message-ID: <1140103096.055772.72500@g43g2000cwa.googlegroups.com>

> def lowest(s1,s2):
>     s = ""
>     for c1,c2 in [x for x in zip(s1,s2)]:
>         s += lowerChar(c1,c2)
>     return s
>
> but it's hardly any more elegant than using a loop counter, and I'm
> guessing it's performance is a lot worse - I assume that the zip
> operation is extra work?
>
> Iain

Always look in itertools for stuff like this:

http://docs.python.org/lib/itertools-functions.html#l2h-1392

for c1, c2 in itertools.izip(s1, s2):
    ...

I haven't profiled it, but it makes sense that this would be fast.



From http  Mon Feb 27 20:45:03 2006
From: http (Paul Rubin)
Date: 27 Feb 2006 17:45:03 -0800
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>
	<873bi4z4w6.fsf@rose.polar.local>
Message-ID: <7x7j7gjly8.fsf@ruckus.brouhaha.com>

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:
> By way of explanation, my earlier implementations of this didn't have
> enumerations as sequences. Now that the design has converged more on a
> sequence and container idiom, I agree with you.

say that 
   Weekdays = enum('mon', 'tue', ...)

What is the type of Weekdays.mon supposed to be?

Do you anticipate having parameters like socket.AF_INET that are
currently integers, become enumeration members in future releases?


From mhellwig at xs4all.nl  Thu Feb  9 09:08:38 2006
From: mhellwig at xs4all.nl (Martin P. Hellwig)
Date: Thu, 09 Feb 2006 15:08:38 +0100
Subject: by reference
In-Reply-To: <gp0mu1tt73ipl47dktbk6el9ef5pd6sb1u@4ax.com>
References: <1139442499.913588.89620@g14g2000cwa.googlegroups.com>
	<gp0mu1tt73ipl47dktbk6el9ef5pd6sb1u@4ax.com>
Message-ID: <43eb4cf0$0$11067$e4fe514c@news.xs4all.nl>

Rene Pijlman wrote:
> dirvine:
>> I would like to create a dictionary based on a variable [...]
> 
> And what seems to be the problem?
> 
I think that this is his problem:

 >>> 'somename'={}
SyntaxError: can't assign to literal

But I'm puzzled why he wants that route, while I'm still pretty new to 
programming, I usually smell a design fault when I want to try to 
squeeze a literal name into a object variable (am I'm saying this 
correct?). Most of the time nesting dictionaries will do the trick for me:

 >>> sharedDict=dict()
 >>> sharedDict['somename']=dict()
 >>> sharedDict['someothername']=dict()
 >>> sharedDict
{'somename': {}, 'someothername': {}}
 >>>

-- 
mph


From Matt  Sun Feb 19 22:44:58 2006
From: Matt (Matt)
Date: Mon, 20 Feb 2006 03:44:58 GMT
Subject: Mac OS X Installation Problem
Message-ID: <yEncExpress_Rulz!_www.techsono.com_3223251899@firstva.com>

aleaxit at yahoo.com (Alex Martelli) wrote:

>Edit a ~/.bashrc file to add /usr/local/bin to your PATH.

Hi Alex,

Easier said than done for a non-unix expert. Correct me if I am wrong. Bash 
looks at the contents of the PATH variable to decided which directories it 
should scan when parsing a command. If I type "Python -v", it will look in all 
of those directories for a file called "Python" and then execute it, passing 
it the -v parameter. Right?

I've been googling around for about an hour now, and I can't find any 
instructions on how to create or edit a .bashrc file. I tried to make one of 
my own using bash and nano, but got stuck with the save command. It looks like 
I am supposed to use the "M-O" command to save it in Mac format, but I have no 
idea how to type that. A search of the nano docs for "M-O" didn't turn up 
anything either. I also tried to make a .bashrc file on my Windows box and 
copy it to my Mac, but the Finder gave me an error message saying that I'm not 
allowed to make files that begin with a dot.

Is there a web page somewhere that explains this?

Thanks,
Matt





From wrongbad at gmail.com  Fri Feb 24 02:45:11 2006
From: wrongbad at gmail.com (I V)
Date: 23 Feb 2006 23:45:11 -0800
Subject: ls files --> list packer
In-Reply-To: <1140765792.864556.289820@i40g2000cwc.googlegroups.com>
References: <1140765792.864556.289820@i40g2000cwc.googlegroups.com>
Message-ID: <1140767111.490691.42460@e56g2000cwe.googlegroups.com>


kpp9c wrote:
> Namely i have organized a bunch of folders that have soundfiles in them
> and would like Python to slurp up all the .aif/.aiff (or .wav whatever)
> files in a given set of directories. My friend hacked up this is perl:
>
> $files = `ls /snd/Public/*.aiff`;

You could use posix.popen to duplicate the perl hack:

files = posix.popen('ls /snd/Public/*.aiff').read().strip()

> @snd_filelist = split('\n',$files);

snd_filelist = files.split('\n')

> I would like something similar, that works with python that is more
> elegant and maybe even more robust.

Lucklily, python lets you avoid this kind of horrible hack. Try
os.listdir:

snd_filelist = [f for f in os.listdir('/snd/Public/') if
f.endswith('.aiff')]

I think it's more elegant, and it's certainly more robust.

> but i am failing miserably and my perl friends mock me.

Now you get to mock your perl friends!



From ptmcg at austin.rr.com  Thu Feb 16 10:48:18 2006
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 16 Feb 2006 07:48:18 -0800
Subject: Determing whether two ranges overlap
In-Reply-To: <pan.2006.02.16.15.22.15.647369@digital-crocus.com>
References: <pan.2006.02.16.15.22.15.647369@digital-crocus.com>
Message-ID: <1140104898.548216.16210@z14g2000cwz.googlegroups.com>


Robin Haswell wrote:
> Hey guys
>
> I was wondering if you could give me a hand with something. If I have two
> tuples that define a range, eg: (10, 20), (15, 30), I need to determine
> whether the ranges overlap each other.

def overlap(a,b):
    return a[0] <= b[0] <= a[1] or b[0] <= a[0] <= b[1]

-- Paul



From kent at kentsjohnson.com  Sun Feb 26 13:17:38 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Sun, 26 Feb 2006 13:17:38 -0500
Subject: Coding Problem (arbitrary thread sych)
In-Reply-To: <1140975744.540285.45170@j33g2000cwa.googlegroups.com>
References: <1140975744.540285.45170@j33g2000cwa.googlegroups.com>
Message-ID: <4401ec29$1_1@newspeer2.tds.net>

peleme wrote:
> The threads which arrives to the s function should wait for each other
> until the last one. So A, B, and C executes the last function
> 'together', while D executes it seperate.
> I only know that three threads have to be in synch.

Take a look at the Barrier patter in The Little Book of Semaphores:
http://greenteapress.com/semaphores/

It requires that you know in advance how many threads need to rendezvous 
so you will have to preprocess your args a little.

Kent


From grante at visi.com  Mon Feb 13 12:35:18 2006
From: grante at visi.com (Grant Edwards)
Date: Mon, 13 Feb 2006 17:35:18 -0000
Subject: emacs keybindings for scite/scinitilla?
References: <11v1e42r13h4dce@corp.supernews.com>
Message-ID: <11v1gqmeuaace9d@corp.supernews.com>

On 2006-02-13, Grant Edwards <grante at visi.com> wrote:
> This is technically off-topic, but scite/scinitilla seems to
> have a particular connection to the Python community.
>
> I just tried scite for the first time and rather like it.  It
> uses GTK, which is shared with my desktop (XFCE) so it starts
> up fast.  It's fairly lean (at least by Emacs/Gnome/KDE
> standards), but I don't think I can un-learn emacs keybindings.
>
> Are emacs keybindings availble for scite somehow?

It seems there isn't.  

And it's apparently not possible.

Scintilla only supports single-key bindings, so there's no way
to impliment "prefix" keys like emacs's META or Ctrl-C. :(

I guess that's the end of Scite for me.

-- 
Grant Edwards                   grante             Yow!  I'll show you MY
                                  at               telex number if you show
                               visi.com            me YOURS...


From kent at kentsjohnson.com  Tue Feb 28 07:29:43 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Tue, 28 Feb 2006 07:29:43 -0500
Subject: Fetching the Return results of a spawned Thread
In-Reply-To: <mailman.2506.1141119524.27775.python-list@python.org>
References: <mailman.2506.1141119524.27775.python-list@python.org>
Message-ID: <44043d95$1_1@newspeer2.tds.net>

Alvin A. Delagon wrote:
> Is there any way to fetch the Return results of spawned threads within 
> the parent script? 

There are several examples of this in the threading section of the 
Python Cookbook for example
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/84317
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/435883

Kent


From medicaldevicetragedy at yahoo.com  Thu Feb  9 16:23:25 2006
From: medicaldevicetragedy at yahoo.com (medicaldevicetragedy at yahoo.com)
Date: 9 Feb 2006 13:23:25 -0800
Subject: Mental Abuse
Message-ID: <1139520205.299558.192090@g44g2000cwa.googlegroups.com>

My abuser has been using the medical device to harass me the last 4-5
years. I have no idea what type of a device is being used on me. I
believe the device is only available to licensed pharmacist(s). I am
not very familiar with the intend usage of the device. As I understand,
the device can be used as a stimulator; 24 hours therapeutic session;
ease off a lot of emotion--anger, sadness, fear...ect.; enhance
recovery of mental illnesses. If abuse is the intention, it can be used
to sense what the other person's thinking or as a form of communication
through inner voices. In my case, the abuser has been using it to
insult me in every way he could possible think of. As I know, a single
device is only effective if you are in the same city. Mulitple devices
can reach billion of people world wide.  Fear of being evaluate as
mental ill due to lack of physical evidence. I am hoping to find out
more about the device, before reporting to the police. If anyone know
what type of a device has been using on me. Who manufacture such a
device. What can I do to stop the abuser from such criminal act? Please
email me at khaccountant at yahoo.com, I would greatly appreciated.



From http  Tue Feb  7 15:31:52 2006
From: http (Paul Rubin)
Date: 07 Feb 2006 12:31:52 -0800
Subject: Is Python good for web crawlers?
References: <1139330008.270988.227170@g44g2000cwa.googlegroups.com>
Message-ID: <7x1wyekj0n.fsf@ruckus.brouhaha.com>

"Tempo" <bradfordh at gmail.com> writes:
> I was wondering if python is a good language to build a web crawler
> with? For example, to construct a program that will routinely search x
> amount of sites to check the availability of a product. Or to search
> for news articles containing the word 'XYZ'. These are just random
> ideas to try to explain my question a bit further.

I've written a few of these in Python.  The language itself is fine
for this.  The built-in libraries do most of what you'd hope, though
they have room for improvement.  Generally I use urllib.read() to get
the whole html page as a string, then process it from there.  I just
look for the substrings I'm interested in, making no attempt to
actually parse the html into a DOM or anything like that.


From neuzhoundxx at yahoo.com  Thu Feb 16 23:16:18 2006
From: neuzhoundxx at yahoo.com (john peter)
Date: Thu, 16 Feb 2006 20:16:18 -0800 (PST)
Subject: Queue.Queue()
Message-ID: <20060217041618.98089.qmail@web36708.mail.mud.yahoo.com>

 what happens behind the scene when i create a Queue.Queue() without specifying
    a maxsize?  does a block of space gets allocated initially then  dynamically "expanded" as needed?  if so, what is the default size of  the initial space? is it
    always better to specify a big enough maxsize initially for efficiency purposes, or
    does it matter much? Thanks in advance for any help/detail
		
---------------------------------
 
 What are the most popular cars? Find out at Yahoo! Autos 
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From duncan.booth at invalid.invalid  Tue Feb 21 08:31:45 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 21 Feb 2006 13:31:45 GMT
Subject: share function argument between subsequent calls but not between
	class instances!
References: <11vejkega5tbrc5@corp.supernews.com>
	<Xns976EAB5E52818duncanbooth@127.0.0.1>
	<87wtfsb9jc.fsf@rose.polar.local>
	<Xns976F9371C4C90duncanbooth@127.0.0.1>
	<pan.2006.02.20.22.18.28.931866@REMOVETHIScyber.com.au>
Message-ID: <Xns9771899D2B4D1duncanbooth@127.0.0.1>

Steven D'Aprano wrote:

>>> The most common idiom for such a marker is the None value.
>>> 
>> 
>> Can you provide any firm evidence that using None is more common?
> 
> 
> Yes, I wrote a quick and dirty script to roughly count the default
> values in the Python 2.3 standard library. Here are my results:
> 
> $ python default_counter.py
> 185 .py source files were opened.
> 4437 function or method definitions were found.
> These functions included at least 1228 arguments with default values.
> 529 or 4.307818e+01% used None as the default value.
> 
> So, roughly 40% of default values in the standard library are None. 

Fair enough, although I would point out that you haven't made any attempt 
to distinguish those cases where None is being used as a marker from the 
cases where it is being used as a value in its own right or a flag to 
control the function logic.

The marker cases do seem to be the most common but there are plenty of 
other cases:

e.g. base64.b64encode & base64.b64decode avoid part of the code if passed 
None, but don't actually substitute another value in place of the default.

cgi.FieldStorage has methods getvalue, getfirst where the default=None is 
simply that: the default to be returned. The make_file method has a 
defaulted argument which it doesn't use at all.

Also, most of the standard library predates a time when you could create a 
unique marker value just by calling 'object()'. When it was written None 
was by far the simplest option even in cases where a separate marker value 
might have been more appropriate.


From michele.petrazzo at TOGLIunipex.it  Wed Feb 15 04:56:29 2006
From: michele.petrazzo at TOGLIunipex.it (Michele Petrazzo)
Date: Wed, 15 Feb 2006 10:56:29 +0100
Subject: using the Filters DLL (image filters)
In-Reply-To: <mailman.1935.1139994580.27775.python-list@python.org>
References: <mailman.1935.1139994580.27775.python-list@python.org>
Message-ID: <43f2fac9$0$29094$5fc30a8@news.tiscali.it>

Dieter Vanderelst wrote:
> Hello,
> 
> I'm trying to access the Filters-Dll provided by the filters-project
>  (http://filters.sourceforge.net/index.htm).

Nice project :)

> 
> Following the advice I got from the Python list -thank you for that-,
> I do this using ctypes 
> (http://starship.python.net/crew/theller/ctypes/index.html).

Good choose!

> 
> I can seem to access the image filters now provided by the Dll. But 
> reading and writing of images is still a problem.

What are the problems? Please specify it.

> Furthermore, the project is not very well documented. So, I was 
> wondering whether there are people on this list that have some 
> experience in using the filters Dll. Maybe they could sent me some 
> examples of the use of the Dll with Python?

There are a lot of python projects that use ctypes for use libraries
(.dll/.so). You can see them for study and copy that code (like all do :P ).
Start at wnd.sf.net and freeimagepy.sf.net

> 
> Kind regards, Dieter
> 

Bye,
Michele


From roccomoretti at hotpop.com  Wed Feb 22 13:45:16 2006
From: roccomoretti at hotpop.com (Rocco Moretti)
Date: Wed, 22 Feb 2006 12:45:16 -0600
Subject: Python vs. Lisp -- please explain
In-Reply-To: <yfsaccjl2kh.fsf@oc.ex.ac.uk>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<yfspsljp321.fsf@oc.ex.ac.uk>
	<1140425017.101462.117380@g47g2000cwa.googlegroups.com>
	<yfslkw5msih.fsf@oc.ex.ac.uk>
	<1140622216.436013.234400@g47g2000cwa.googlegroups.com>
	<yfsaccjl2kh.fsf@oc.ex.ac.uk>
Message-ID: <dtibfr$f9p$1@news.doit.wisc.edu>

Alexander Schmolck wrote:
> I wanted to point
> out that one could with just as much justification claim CL to be more dynamic
> than python (it is in some regards, but not in others -- how to weight them to
> achieve some overall "score" is not obvious. 

I think it's worth pointing out that not all dynamicism is equal, when 
it comes to difficulty in compiling to machine code.

> For example in CL you could just write
> 
>   def foo(x, l=[], N=len(l)): [...]

Although computing default arguments at call-time vs. define-time is 
arguably more dynamic, it really doesn't (appreciably) increase the 
difficulty in creating machine code.

I think (see Caveat) that the one major difference between Lisp and 
Python that has a major bearing on compilability is mutability.

Lisp, like the good functional language that it is, has (primarily) 
immutable values, and minimal side effects. That is, you can make a 
function that takes in one value, and outputs a different value, but 
once you have a handle on a value, that value doesn't ever change. That 
makes it comparatively easy to track value paths, and assign proper 
machine code to each operation.

Python, on the other hand, is mutable to an absurd degree, with 
reassignments and side effects galore. Even a relatively simple function 
like:

def f():
     act(module.value)
     random_function()
     act(module.value)

can't be (automatically) replaced with the "obvious" equivalent:

def f():
     mv = module.value
     act(mv)
     random_function()
     act(mv)

because of the off chance that random_function() will reassign 
module.value. Even if you look at random_function(), and rule out a 
change to module.value, there is always a chance that a some other 
thread will alter module.value in the mean time. Trivial example, true, 
but when you figure that you can do the same to any operation or builtin 
function, the compiler is never quite sure what a particular function 
will do, what side effects it may have, or what type it will return. In 
order to be ready for any contingency, a compiled Python program will 
effectively have to incorporate the entire interpreter.

C/C++ gets around the mutability issue by straight-jacketing types & 
functions. A variable will only contain a particular type (or a 
subclass), and a function always has a particular signature.

Granted, there are ways of doing heavy duty code analysis, and pinning 
down functions, types, and side effects in Python, and 
Psyco/PyPy/ShedSkin are making good strides in that regards. But due to 
the heavy dependency on mutable objects and side effects in Python, such 
analysis will never be as easy as with Lisp, and considering Python has 
had less time, and less investment in those areas, it's no wonder that 
it's only just now seeing progress on the compiler front.


* Caveat: I've never seriously programmed in Lisp, and the last time I 
looked at it was some time ago, with not-up-to-date reference materials. 
I might be mistaken about the extent of mutability in current versions 
of Lisp. Hopefully others with more knowledge can give more accurate 
details of mutability/side effects in Lisp vis-a-vis ease of compilation.



From sw at wordtech-software.com  Sat Feb 11 09:42:09 2006
From: sw at wordtech-software.com (Kevin Walzer)
Date: Sat, 11 Feb 2006 09:42:09 -0500
Subject: Martin Franklin's Tkinter/Tile wrapper--where'd it go?
In-Reply-To: <dc539$43ece399$4275d90a$27102@FUSE.NET>
References: <dc539$43ece399$4275d90a$27102@FUSE.NET>
Message-ID: <43EDF7C1.1020903@wordtech-software.com>

Kevin Walzer wrote:
> I believe Martin Franklin wrote a Tile.py wrapper for the Tk/Tile
> extension, which adds theming to the core Tk widget set. It used to
> reside here:
> 
> http://mfranklin.is-a-geek.org/docs/Tile/index.html
> 
> That server seems to be down. Anyone know if the wrapper is available
> elsewhere? Or if someone else has written a Tile wrapper?
> 
According to Mr. Franklin the site should be back online very soon.


-- 
Kevin Walzer
iReveal: File Search Tool
http://www.wordtech-software.com


From gherron at islandtraining.com  Wed Feb  1 12:02:09 2006
From: gherron at islandtraining.com (Gary Herron)
Date: Wed, 01 Feb 2006 09:02:09 -0800
Subject: python printout format
In-Reply-To: <20060201163626.ABFA21589B@net.tamu.edu>
References: <20060201163626.ABFA21589B@net.tamu.edu>
Message-ID: <43E0E991.2010205@islandtraining.com>

Yong Wang wrote:

>Hi,
>   I have a data set like row = [[1,2,3,4,5], [6,7,8,9,10], [11,12,13,14,15]]
>   when I use loop to print out data, I got compile error in printout statment.
>   while j<24:
>       print ' ',string.ljust(str(units[0]), 5),
>       print ' ',string.ljust(str(ports[j], 3),
>       print ' ',string.ljust(PortlinkbeatInv[row[j][0]],14),
>       print ' ',string.ljust(PortStatusInv[row[j][1]], 19),
>       print ' ',string.ljust(PortTestResultInv[row[j][2]],17),
>       print ' ',string.ljust(PortVisualInv[row[j][3]],19),
>       print ' ',string.ljust(PortAddrVioInv[row[j][4]],15)
>       j=j+1
>    misc.doPg('Port status listing on ' + tag + ' (Page %d):',
>                      vals,doBanner,doRow)
>
>   Error messages are:
>python -c "import compileall; compileall.compile_dir('.',0)"
>Listing . ...
>Compiling ./Ciscoports.py ...
>  File "./Ciscoports.py", line 753
>    print string.ljust(PortlinkbeatInv[row[j][0]],14),
>        ^
>SyntaxError: invalid syntax
>  
>
The problem here is that the previous line has unbalanced parentheses.  
Fix that, and there should be no problem with this line.

Gary Herron

>
>   How should I change to printout row data [1,2,3,4,5] in one row in assigned format?
>   Many thanks,
>
>    Yong
>
>  
>



From python at rcn.com  Tue Feb  7 04:14:46 2006
From: python at rcn.com (Raymond Hettinger)
Date: 7 Feb 2006 01:14:46 -0800
Subject: Question about idioms for clearing a list
In-Reply-To: <1138744075.653568.147910@z14g2000cwz.googlegroups.com>
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<449nrpF13n66U1@uni-berlin.de>
	<1138744075.653568.147910@z14g2000cwz.googlegroups.com>
Message-ID: <1139303686.871321.174670@f14g2000cwb.googlegroups.com>

[bearophileHUGS at lycos.com]
> In my programs I have seen that there is another practical difference
> between version 1 and 3:
> (1) mylist[:] = []
> (3) mylist = []
> If you create a big mylist again and again many times, the version 1
> uses the memory more efficiently (probably less work for the garbage
> collector), and the program can be (quite) faster (this is true in some
> implementations different from CPython too).

There should be almost no difference in runtime between the two.  The
underlying CPython implementation caches list objects and is usually
able to create the new list without any calls to the memory allocator.
Likewise, garbage collection performs the same for both -- any objects
left with no references are immediately freed and any with only
circular references get freed when the collector runs.

The speed-up you observed likely occured with different code.  For
instance, given a large list, you can typically update or replace
individual elements faster than you can build-up a new list:

  L = [0] * 1000     # starting list
  for i in xrange(len(L)):
      L[i] += 1

beats:

  L = [0] * 1000     # starting list
  L = [L[i]+1 for i in xrange(len(L))]


Raymond



From rtilley at vt.edu  Mon Feb 20 18:38:54 2006
From: rtilley at vt.edu (rtilley)
Date: Mon, 20 Feb 2006 18:38:54 -0500
Subject: urllib2 auth error
In-Reply-To: <dtdjgk$5of$1@solaris.cc.vt.edu>
References: <dtdjgk$5of$1@solaris.cc.vt.edu>
Message-ID: <dtdjs2$6pi$1@solaris.cc.vt.edu>

rtilley wrote:
> I have the right username and password. I may be using the above code 
> wrong. Any tips?

I had the _wrong_ password... Sorry.


From tdelaney at avaya.com  Thu Feb  9 15:41:18 2006
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Fri, 10 Feb 2006 07:41:18 +1100
Subject: Too Many if Statements?
Message-ID: <2773CAC687FD5F4689F526998C7E4E5F4DB932@au3010avexu1.global.avaya.com>

slogging_away wrote:

> Delaney, Timothy (Tim) wrote:
> 
>> I'm pretty sure the OP has hit the python script line limit (32767?).
> 
> The script is 4903 lines long.

Well blow that idea out of the water. I was then going to suggest
looping over tests, but noticed someone else already had.

> Slightly off topic; I am just a Network Engineer that can write some
> code that accomplishes what I need to get done.  I'm learning
> something new everyday but I am really blown away by the responses to
> this thread.  I could not buy support this good.  Thanks for your
> responses.

We'll settle up later ... I call dibs on breaking his kneecaps!

Tim Delaney


From gh at ghaering.de  Fri Feb 24 07:11:11 2006
From: gh at ghaering.de (=?ISO-8859-1?Q?Gerhard_H=E4ring?=)
Date: Fri, 24 Feb 2006 13:11:11 +0100
Subject: MySQLdb slow on MySQL 5
In-Reply-To: <dtmk8t$an9$1@wake.carmen.se>
References: <1140716394.225560.27920@t39g2000cwt.googlegroups.com>	<mailman.2364.1140721473.27775.python-list@python.org>	<1140727082.800917.44550@i40g2000cwc.googlegroups.com>
	<dtmk8t$an9$1@wake.carmen.se>
Message-ID: <43FEF7DF.2040202@ghaering.de>

Magnus Lycka wrote:
> timothy.williams at nvl.army.mil wrote:
>   > I'm not calling COMMIT at all.
> 
> Then you must be using autocommit if your records stay in
> the table. An DB-API 2.0 compliant adapter should turn off
> autocommit by default! Does MyISAM even support proper
> commit handling? [...]

No, it doesn't. And COMMIT is then simply a no-op if it doesn't raise an 
error already.

> Oh well, Oracle will probably kill MySQL soon. 

Did you read too much Slashdot to spread such FUD?

> [...] I'd use a real database system.

MySQL 5 could be described as one, according to the feature list, and if 
you use a transactional table type.

I myself won't bother with it because PostgreSQL is still more 
featureful that MySQL 5, has a much longer track record with these 
features proven stable and a more liberal licensing.

-- Gerhard


From johnjsal at NOSPAMgmail.com  Thu Feb 16 11:43:58 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 16 Feb 2006 16:43:58 GMT
Subject: question about scope
In-Reply-To: <mailman.2012.1140105439.27775.python-list@python.org>
References: <9J0Jf.1630$No6.38274@news.tufts.edu>
	<mailman.2012.1140105439.27775.python-list@python.org>
Message-ID: <iZ1Jf.1632$No6.38223@news.tufts.edu>

Fredrik Lundh wrote:
> John Salerno wrote:
> 
>> But my real question is this, which is related to the above:
>>
>> "Name references search at most four scopes: local, then enclosing
>> functions (if any), then global, then built-in."
>>
>> I understand what global and built-in are, and I thought I understood
>> the concept of local too, but when I got to this sentence (and the
>> previous sentence), I became confused about the first two scopes. What's
>> the difference between 'local' and 'enclosing functions'?
> 
> consider a nested function:
> 
>     var1 = "global"
> 
>     def outer():
> 
>         var2 = "enclosing"
> 
>         def inner():
> 
>             var3 = "local"
> 
>             print var1, var2, var3
> 
>         inner() # call it
> 
> inside "inner", var1 refers to the global variable, var2 to the enclosing
> variable (which is local to "outer"), and var3 to the local variable.
> 
> "enclosing scope locals" are also called "free variables".
> 
> </F>
> 
> 
> 

Thanks guys. It seems like nested functions were what the authors had in 
mind, so that makes a lot more sense now.

But as far as ifs and loops, is there such a thing as scope in them? For 
example, if I assign a variable within an if statement, is it usable 
anywhere else?


From aleaxit at yahoo.com  Sun Feb 26 19:41:18 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 26 Feb 2006 16:41:18 -0800
Subject: Local variables initialization
References: <dttf62$qng$1@news.onet.pl>
Message-ID: <1hbdjrw.1lrbcv8k3kcbsN%aleaxit@yahoo.com>

Michal Kwiatkowski <ruby at no.spam> wrote:
   ...
> def method(self):
>     var_one = self.attr_one
>     var_two = self.attr_two.another_attr
>     empty_list = []
>     # significant code goes here
   ...
> know, I know ;), but maybe there is a way? I would like to code it that way:
> 
> @init_local_variables
> def method(self):
>     # significant code goes here

Such a decorator would have to do very substantial bytecode rewriting,
to turn all references to the magic names within the body of the method
into local-variable references (and a lot of other things besides).
Check the difference...:

>>> import dis
>>> def f1():
...   x = 23
...   return x
... 
>>> dis.dis(f1)
  2           0 LOAD_CONST               1 (23)
              3 STORE_FAST               0 (x)
  3           6 LOAD_FAST                0 (x)
              9 RETURN_VALUE        
>>> def f2():
...   return x
... 
>>> dis.dis(f2)
  2           0 LOAD_GLOBAL              0 (x)
              3 RETURN_VALUE        

Every access to 'x' within f1 is a LOAD_FAST, because the compiler knows
that x is local; but within f2 it's a different opcode, LOAD_GLOBAL,
because the compiler knows that x ISN'T local (it's not assigned to
within the body) and therefore it guesses it must be local.

The whole function object, as well as the code object it contains, must
be rewritten extensively to add the 'magic' names among the local
variables -- not being assigned-to, they're used in all ways as globals
in the code obejct and function object that the decorator receives.

I would suggest that the issue is hairy enough to apply one of the least
understood points of the "Zen of Python", namely:
"If the implementation is hard to explain, it's a bad idea."

If I absolutely HAD to implement such a "micromacro" system, after
pushing back for all I'm worth and presumably failing, I'd punt and go
for SOURCE manipulation instead (which does in turn give heavy
constraints -- no bytecode-only distribution).  For example, here's a
WAY over-fragile example, intended STRICTLY as such:

import inspect

def manip(f):
    s = inspect.getsourcelines(f)[0]
    delta = len(s[0])-len(s[0].lstrip())
    del s[0]
    s[:] = [x[delta:] for x in s]
    delta = len(s[1])-len(s[1].lstrip())
    s.insert(1, delta*' '+'x=23\n')
    d = {}
    exec ''.join(s) in d
    return d[f.func_name]

class X(object):

    @manip
    def a(self):
        print x

    @manip
    def b(self):
        print x+2

x = X()
x.a()
x.b()


The 'manip' example decorator places many implicit constraints on the
sourcecode of the method that it decorates (single-line def clause, NO
docstring to follow, no use of tabs for indentation but rather only
spaces, etc, etc), which is why it's WAY over-fragile -- but, it does
insert an 'x=23' assignment at the very top, as requested. It can, of
course, be reimplemented in a MUCH more solid way, too (e.g., by using
the Python interface to the AST compiler which seems likely to get
introduced in Python 2.5 -- apparently, a prototype of such a Python
module HAS been already implemented during Pycon, i.e., today).

Personally, I would keep pushing back against this approach even after
I'd gone to the trouble of implementing it more solidly -- in no way is
clarity served by having magic local variables appear out of the blue
(or, rather, the black of black magic).  However, whether something CAN
be done, and whether it SHOULD be done, are separate issues.


Alex


From mensanator at aol.com  Mon Feb  6 19:50:14 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 6 Feb 2006 16:50:14 -0800
Subject: in over my head ascii
In-Reply-To: <1139260158.822523.308780@g47g2000cwa.googlegroups.com>
References: <1139245216.350356.272170@z14g2000cwz.googlegroups.com>
	<sk4fu1ljvt7h7d6euj7nq06e1e0ml8p8u5@4ax.com>
	<1139251420.501345.91850@g44g2000cwa.googlegroups.com>
	<1139256817.218319.160370@f14g2000cwb.googlegroups.com>
	<1139259694.603482.293660@g14g2000cwa.googlegroups.com>
	<1139260158.822523.308780@g47g2000cwa.googlegroups.com>
Message-ID: <1139273414.645101.237780@z14g2000cwz.googlegroups.com>


nephish at xit.net wrote:
> i know that those characters exist, the docs say that the server does
> not want the special "ETX" and "STX" characters, but the 3 ascii
> characters "STX" and "ENX" i am not sure why.

What do you bet the server software was written by someone
who thought ASCII STX meant literally the characters "STX"?

I've seen stupider things.



From steve at REMOVETHIScyber.com.au  Sun Feb 26 17:15:06 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Mon, 27 Feb 2006 09:15:06 +1100
Subject: How can I find the remainder when dividing 2 integers
References: <1140984473.723258.70050@e56g2000cwe.googlegroups.com>
	<46egiuFanujjU2@uni-berlin.de>
	<1140985687.324979.153730@e56g2000cwe.googlegroups.com>
	<46ehr1FarmcsU1@uni-berlin.de>
	<1140987212.515152.46050@v46g2000cwv.googlegroups.com>
	<46ej3nFa6ptvU1@uni-berlin.de>
Message-ID: <pan.2006.02.26.22.15.04.7142@REMOVETHIScyber.com.au>

On Sun, 26 Feb 2006 21:58:30 +0100, Diez B. Roggisch wrote:

> silverburgh.meryl at gmail.com schrieb:
>> Can you please tell me what is the meaning of
>>  UnboundLocalError: local variable 'colorIndex' referenced before
>> assignment 
>> 
>> in general?
> 
> Well, pretty much of what it says: You tried to access a variable without prior assignment to it. Like this:
> 
> 
> a = b**2 + c**2
> 
> Won't work. But if you do
> 
> b = 2
> c = 3
> a = b**2 + c**2
> 
> it works. I suggest you read a python tutorial - plenty of the out there, google is as always your friend.


Diez' advice is good, but his example is wrong: it will raise a NameError
exception.

When you have a function like this:

def foo(x):
    z = x + y
    return z

Python's scoping rules treat x and z as local variables, and y as a
global variable. So long as y exists, the function will work.

When you do this:

def bar(x):
    y = 2
    z = x + y
    return z

the scoping rules treat y as a local variable, because you assigned to it.

But with this:

def baz(x)
    z = x + y
    y = 2
    return z
    
the scoping rules see the assignment to y at compile time, so y is treated
as a local variable. But at run time, y is accessed before it has a value
assigned to it: UnboundLocalError

Hope this helps.



-- 
Steven.



From hancock at anansispaceworks.com  Tue Feb 28 16:30:25 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Tue, 28 Feb 2006 15:30:25 -0600
Subject: Python Indentation Problems
In-Reply-To: <1141021286.047172.278030@z34g2000cwc.googlegroups.com>
References: <1141021286.047172.278030@z34g2000cwc.googlegroups.com>
Message-ID: <20060228153025.67731590@samwise.anansi>

On 26 Feb 2006 22:21:26 -0800
diffuser78 at gmail.com wrote:
> I am a newbie to Python. I am mainly using Eric as the IDE
> for coding. Also, using VIM and gedit sometimes.
> 
> I had this wierd problem of indentation. My code was 100%
> right but it wont run because indentation was not right. I
> checked time and again but still no success. I rewrote the
> code over again in VI and it ran.
> 
> Can you please explain whats the trick behind the correct
> indentation.

I'm not sure about Eric, but I found that when using the
Python interpreter through a terminal window, it's often
confusingly fastidious about tabs versus spaces. You would
think that in an interactive context the interpreter would
be smart enough to fix these errors on input (e.g. by
implementing a "convert tabs to spaces" policy by default
-- I've already configured my gvim editor to do that, and
while it's not obviously the right thing to do in an
editor it seems like a no-brainer for an editing mode
whose only purpose is to run Python), but it apparently
doesn't (or didn't anyway -- either I've gotten better
about not mixing them, or it may have been fixed, or else
I'm just lucky to finally have a terminal that agrees with
the interpreter on the width of tabs).

In any case, it's good practice not to mix tabs and spaces.

I actually recommend using just tabs when playing with
the interpreter (it's faster) -- but use spaces in your real
source code files.

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From mudgen at gmail.com  Mon Feb 13 03:14:44 2006
From: mudgen at gmail.com (mudgen at gmail.com)
Date: 13 Feb 2006 00:14:44 -0800
Subject: Writing a Web Robot in Python
Message-ID: <1139818483.962291.131570@g47g2000cwa.googlegroups.com>

I'm working on writing a web robot (for searching web pages) in Python
so I've been browsing around the web looking for data about building
web robots.

I'm surprised to find that I didn't find much data. Seems like robots
would be kind of a common thing to build. I know there is this: "The
Web Robots Pages" (http://www.robotstxt.org/wc/robots.html) but that
doesn't have a lot of data and seems pretty out of date.

I checked amazon.com for books on building web robots and I didn't find
very much. Seems kind of weird that I don't find much data on this
subject. Anybody know some good places to go to get information on
building a web robots?



From davidh at ilm.com  Wed Feb 15 19:25:59 2006
From: davidh at ilm.com (David Hirschfield)
Date: Wed, 15 Feb 2006 16:25:59 -0800
Subject: Question about xmlrpc and threading
In-Reply-To: <43f3be60$0$11071$e4fe514c@news.xs4all.nl>
References: <mailman.1964.1140031046.27775.python-list@python.org>
	<43f3be60$0$11071$e4fe514c@news.xs4all.nl>
Message-ID: <43F3C697.704@ilm.com>

I definitely didn't make it clear enought what I was talking about. I 
know all about the thread issues as far as namespaces go and that sort 
of thing.
Let me try and be clearer:

Forget how my xmlrpc server is implemented, it doesn't matter for this 
question. Just imagine it works and will process requests and return 
results.
I have one connection to the server from my client, created via:

import xmlrpclib
server = xmlrpclib.ServerProxy(...)

So now my client calls:

result = server.doSomething()

and that will take some time to process on the server, so that part of 
the client code blocks waiting for the result.
Now, some other thread in the client calls:

result = server.doSomethingElse()

while doSomething() is still processing on the server and the client is 
still waiting for a result.
My question was whether this is allowed? Can two calls be made via the 
same ServerProxy instance while a request is already underway?

Clearer?
-Dave

Martin P. Hellwig wrote:

>David Hirschfield wrote:
>  
>
>>An xmlrpc client/server app I'm writing used to be super-simple, but now 
>>threading has gotten into the mix.
>>
>>On the server side, threads are used to process requests from a queue as 
>>they come in.
>>On the client side, threads are used to wait on the results of requests 
>>to the server.
>>
>>So the question is: how thread-safe is python xmlrpc? If the client 
>>makes a request of the server by calling:
>>
>>result = server.doSomething()
>>
>>and while that is waiting in the background thread to complete, the 
>>client calls another:
>>
>>result = server.doSomethingElse()
>>
>>will they interfere with each other? Right now I'm avoiding this problem 
>>by queueing up calls to the server to be processed sequentially in the 
>>background. But I'd prefer to allow requests to go in parallel. Should I 
>>just make a new connection to the server for each request?
>>
>>Any advice appreciated,
>>-David
>>
>>    
>>
>
>I'm not sure if I quite understand what you mean by "interfere with each 
>other" but namespaces also apply to xmlrpc servers.
>But let's give a coding example say I have this async server created:
>
>===
>from SocketServer import ThreadingMixIn
>from SimpleXMLRPCServer import SimpleXMLRPCServer
>from time import sleep
>
># Overriding with ThreadingMixIn to create a async server
>class txrServer(ThreadingMixIn,SimpleXMLRPCServer): pass
>
># the Test classs
>class Test(object):
>     def __init__(self):
>         self.returnValue = "Something 1"
>
>     def doSomething(self):
>         sleep(5)
>         return self.returnValue
>
>     def doSomethingElse(self,value):
>         self.returnValue=value
>         return self.returnValue
>
>
># setup server and bind to the specified port
>server = txrServer(('localhost', 8080))
>
># register test class
>server.register_instance(Test())
>
># start the serving
>server.serve_forever()
>===
>
>And I call the function
> >>> doSomething()
>and while it's waiting I call
> >>> doSomethingElse("Else What!"),
>doSomething() will return me:"Else What!" instead of "Something 1" 
>because it's a shared namespace of "self".
>
>
>Now if I modify my example to this:
>
>===
>from SocketServer import ThreadingMixIn
>from SimpleXMLRPCServer import SimpleXMLRPCServer
>from time import sleep
>
># Overriding with ThreadingMixIn to create a async server
>class txrServer(ThreadingMixIn,SimpleXMLRPCServer): pass
>
># the Test classs
>class Test(object):
>     def __init__(self):
>         pass
>
>     def doSomething(self):
>         returnValue = "Something 1"
>         sleep(5)
>         return returnValue
>
>     def doSomethingElse(self,value):
>         returnValue=value
>         return returnValue
>
>
># setup server and bind to the specified port
>server = txrServer(('localhost', 8080))
>
># register test class
>server.register_instance(Test())
>
># start the serving
>server.serve_forever()
>===
>
> >>> doSomethingElse("Now what?")
>Will have no effect on returnValue of doSomething() because they are not 
>shared.
>
>But say that I add the sleep part to doSomethingElse() and call
> >>> doSomethingElse("First")
>and immediately after that on a other window
> >>> doSomethingElse("other")
>What do you think will happen? Will the 2nd call overwrite the firsts 
>calls variable?
>
>I'm not going to spoil it any further ;-), please try the snippets out 
>for yourself (I bet you'll be pleasantly surprised).
>
>hth
>
>  
>

-- 
Presenting:
mediocre nebula.



From reply.in.the.newsgroup at my.address.is.invalid  Tue Feb 21 04:12:28 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Tue, 21 Feb 2006 10:12:28 +0100
Subject: In need of a virtual filesystem / archive
References: <1140489584.412886.201420@g47g2000cwa.googlegroups.com>
Message-ID: <7bmlv1pcn5pvdq2qkv8jm8h0uhik09udh8@4ax.com>

Enigma Curry:
>I need to store a large number of files in an archive. From Python, I
>need to be able to create an archive, put files into it, modify files
>that are already in it, and delete files already in it.

Use the file system. That's what it's for.

-- 
Ren? Pijlman


From justsee at gmail.com  Wed Feb 15 06:47:46 2006
From: justsee at gmail.com (justsee at gmail.com)
Date: 15 Feb 2006 03:47:46 -0800
Subject: Downloading files using urllib in a for loop?
In-Reply-To: <mailman.1942.1140001715.27775.python-list@python.org>
References: <1139996216.765104.119260@g14g2000cwa.googlegroups.com>
	<mailman.1937.1139998195.27775.python-list@python.org>
	<1139998630.164445.207110@f14g2000cwb.googlegroups.com>
	<mailman.1942.1140001715.27775.python-list@python.org>
Message-ID: <1140004066.856896.20090@g47g2000cwa.googlegroups.com>

ah - thanks for your help, but what is happening is the first line
being returned contains the field names from the csv file! Schoolboy
errors :-)



From http  Fri Feb  3 04:48:59 2006
From: http (Paul Rubin)
Date: 03 Feb 2006 01:48:59 -0800
Subject: Best way to determine if a certain PID is still running
References: <mailman.1377.1138957128.27775.python-list@python.org>
Message-ID: <7xfyn06ad0.fsf@ruckus.brouhaha.com>

David Hirschfield <davidh at ilm.com> writes:
> So, should I run a monitor thread which just calls os.waitpid() and
> when the thread indicates via an event that the process completed, I'm
> golden?

Umm, what OS?  And do you have any control over the program running in
the subprocess, or is it doing something arbitrary?  I.e. I'm
wondering if can you do stuff like sharing a file descriptor with the
subprocess, or keeping a pipe open.  

Using a monitor thread doesn't sound too bad, but there may be ways to
avoid it.  But if you're willing to launch a thread, why not just
spawn there without NOWAIT?


From dbough77 at yahoo.com  Mon Feb 20 22:16:28 2006
From: dbough77 at yahoo.com (DannyB)
Date: 20 Feb 2006 19:16:28 -0800
Subject: 2.4.2 + Zone Alarm
In-Reply-To: <1hb2imh.39tehkqjz0nhN%aleaxit@yahoo.com>
References: <1140481575.506191.9980@g47g2000cwa.googlegroups.com>
	<1hb2imh.39tehkqjz0nhN%aleaxit@yahoo.com>
Message-ID: <1140491788.096804.93850@g14g2000cwa.googlegroups.com>

>Well, good look in court, then...!-)

LOL!  wow thats funny =).  Type-o's can be pretty amusing sometimes.

I will definatly try to reproduce the error w/o running ZA.  I'll post
the bug if it does happen again.

Thanks for the help!!

Dan



From timr at probo.com  Sat Feb 11 01:29:01 2006
From: timr at probo.com (Tim Roberts)
Date: Sat, 11 Feb 2006 06:29:01 GMT
Subject: Inserting record with Microsoft Access
References: <mailman.1648.1139475091.27775.python-list@python.org>
Message-ID: <no0ru15ihprrjet5l564kt4auo099m3nap@4ax.com>

"jeffhg582003" <jeffhg582003 at yahoo.com> wrote:
>
>I am developing a python script which add records to 
>a microsoft access tables. All my tables have autogenerated number
>fields. I am trying to capture the number generated from the insert but
>I am not exactly sure how to do that after an insert.

http://support.microsoft.com/kb/221931/EN-US/

What tool are you using?  With ADODB recordsets, you can fetch the
"absolutePosition" property, save it, do a Requery to update the recordset,
then set absolutePosition to the value you saved.  Now, you can read the
fields of your new record, including the autonumber.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From edloper at gradient.cis.upenn.edu  Mon Feb 27 16:37:09 2006
From: edloper at gradient.cis.upenn.edu (Edward Loper)
Date: Mon, 27 Feb 2006 16:37:09 -0500
Subject: unicode question
In-Reply-To: <440334D3.5010302@livinglogic.de>
References: <43FFC95E.4030202@gradient.cis.upenn.edu>
	<440334D3.5010302@livinglogic.de>
Message-ID: <44037105.1030100@gradient.cis.upenn.edu>

Walter D?rwald wrote:
> Edward Loper wrote:
> 
>> [...]
>> Surely there's a better way than converting back and forth 3 times?  Is
>> there a reason that the 'backslashreplace' error mode can't be used 
>> with codecs.decode?
>>
>>  >>> 'abc \xff\xe8 def'.decode('ascii', 'backslashreplace')
>> Traceback (most recent call last):
>>    File "<stdin>", line 1, in ?
>> TypeError: don't know how to handle UnicodeDecodeError in error callback
> 
> The backslashreplace error handler is an *error* *handler*, i.e. it 
> gives you a replacement text if an input character can't be encoded. But 
> a backslash character in an 8bit string is no error, so it won't get 
> replaced on decoding.

I'm not sure I follow exactly -- the input string I gave as an example 
did not contain any backslash characters.  Unless by "backslash 
character" you mean a character c such that ord(c)>127.  I guess it 
depends on which class of errors you think the error handler should be 
handling. :)  The codec system's pretty complex, so I'm willing to 
accept on faith that there may be a good reason to have error handlers 
only make replacements in the encode direction, and not in the decode 
direction.

> What you want is a different codec (try e.g. "string-escape" or 
> "unicode-escape").

This is very close, but unfortunately won't quite work for my purposes, 
because it also puts backslashes before "'" and "\\" and maybe a few 
other characters.  :-/

 >>> print "test: '\xff'".encode('string-escape').decode('ascii')
test: \'\xff\'

 >>> print do_what_i_want("test:\xff'")
test: '\xff'

I think I'll just have to stick with rolling my own.

-Edward



From python-url at phaseit.net  Mon Feb 27 19:08:03 2006
From: python-url at phaseit.net (Cameron Laird)
Date: Tue, 28 Feb 2006 00:08:03 GMT
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Feb 27)
Message-ID: <du01ou$bb8$1@lairds.us>

QOTW:  "Actually, Python has the distinction of being both a great tool
language *and* a great Zen language. That's what makes Python so cool
;-)))" - Ron Stephens

"It is probably possible to do the whole thing with a regular expression.
It is probably not wise to do so." - John Zenger (among MANY other wise
people)


    Steve Holden generates abundant volume of PyCon reportage
    when executive responsibilities don't tether him:
       http://holdenweb.blogspot.com/

    A question from Brian Blais on the simplest non-trivial sorting
    elicits a satisfying range of expressions:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/560fda5a309a08ab/

    Use the 'Net for backups in a far more sophisticated way:
        http://www.csua.berkeley.edu/~emin/source_code/dibs/   

    A beta release of the updated official Python site will go 
    live on 5 March 2006:
        http://wiki.python.org/moin/PyCon2006/Sprints/PydotorgSprint


========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Steve Bethard, Tim Lesher, and Tony Meyer continue the marvelous
    tradition early borne by Andrew Kuchling, Michael Hudson and Brett
    Cannon of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and
sponsor the "Python-URL!" project.


From l.exsteens at gmail.com  Thu Feb  2 12:29:45 2006
From: l.exsteens at gmail.com (Laurent)
Date: 2 Feb 2006 09:29:45 -0800
Subject: my openGL API need threads!!! But how to ,ake it work???
In-Reply-To: <44ekogF1oeqgU1@uni-berlin.de>
References: <1138883972.001578.149350@g44g2000cwa.googlegroups.com>
	<1138889819.536105.57620@g47g2000cwa.googlegroups.com>
	<44ekogF1oeqgU1@uni-berlin.de>
Message-ID: <1138901385.767694.288170@g49g2000cwa.googlegroups.com>

That is exactly what I do not want!!

this is not transparent, I'm sure it is possible to make what I want:
Scene = ooglScene()
Scene.run()
scene.append(ooglPoint())



From rrr at ronadam.com  Sun Feb 26 19:22:46 2006
From: rrr at ronadam.com (Ron Adam)
Date: Sun, 26 Feb 2006 18:22:46 -0600
Subject: sort one list using the values from another list
In-Reply-To: <1hbdcma.11xgwfqcbbjjjN%aleaxit@yahoo.com>
References: <mailman.2447.1140969980.27775.python-list@python.org>
	<Bb-dncKoOeYvQ5zZRVn-uw@comcast.com>
	<1140981038.788111.93500@j33g2000cwa.googlegroups.com>
	<9bpMf.109707$4l5.58949@dukeread05>
	<1hbdcma.11xgwfqcbbjjjN%aleaxit@yahoo.com>
Message-ID: <PFrMf.109742$4l5.51518@dukeread05>

Alex Martelli wrote:
> Ron Adam <rrr at ronadam.com> wrote:
> 
>> bearophileHUGS at lycos.com wrote:
>>> Your solution Steven Bethard looks very intelligent, here is a small
>>> speed test, because sorting a list according another one is a quite
>>> common operation.
>>> (Not all solutions are really the same, as Alex has shown).
>> Try this one.
>>
>> def psort10(s1, s2):
>>      d = dict(zip(s2,s1))
>>      s1[:] = (d[n] for n in sorted(d.keys()))
>>
>> It's faster on my system because d.keys() is already sorted.  But that
>> may not be the case on other versions of python.
> 
> If there are duplicates in s2, this solution will silently lose some
> items from s1.  I would at least include an assert len(s2)==len(d) as
> the second statement to get some insurance that this doesn't occur.
> 
> 
> Alex

Good point,  and a function that only works part time isn't good.  ;-)



From steve at REMOVETHIScyber.com.au  Thu Feb 16 11:58:29 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 17 Feb 2006 03:58:29 +1100
Subject: Determing whether two ranges overlap
References: <pan.2006.02.16.15.22.15.647369@digital-crocus.com>
Message-ID: <pan.2006.02.16.16.58.28.548230@REMOVETHIScyber.com.au>

On Thu, 16 Feb 2006 15:22:15 +0000, Robin Haswell wrote:

> Hey guys
> 
> I was wondering if you could give me a hand with something. If I have two
> tuples that define a range, eg: (10, 20), (15, 30), I need to determine
> whether the ranges overlap each other. The algo needs to catch:
> 
> (10, 20) (15, 25)
> (15, 25) (10, 20)
> (10, 25) (15, 20)
> and
> (15, 20) (10, 25)


What do you mean "catch"? Do you expect the algorithm to recognise these
combinations as special and return something different?

I'm going to assume that there are no magic values that need to be caught,
because I don't know what that means, and just proceed as if the task is
to compare two tuples of the form (x1, x2) where x1 <= x2.

# warning: untested!
def isoverlap((x1,x2), (y1,y2)):
    """Given two numeric ranges, returns a flag True or False
    indicating whether they overlap.

    Assumes that the ranges are ordered (smallest,largest). If 
    that assumption is wrong, incorrect results may occur."""

    # Fully overlapping cases:
    #     x1 <= y1 <= y2 <= x2
    #     y1 <= x1 <= x2 <= y2
    # Partially overlapping cases:
    #     x1 <= y1 <= x2 <= y2
    #     y1 <= x1 <= y2 <= x2
    # Non-overlapping cases:
    #     x1 <= x2 < y1 <= y2
    #     y1 <= y2 < x1 <= x2

    return not (x2 < y1 or y2 < x1)



> I can think of lots of ways to do this but it's in a tight loop so I
> need it to be as efficient as possible.

"Efficient as possible" in what way? Least memory used? Smallest
number of bytes of source code? Fastest performance?

Assuming you need fastest performance, the general method to do that is to
write it in hand-tuned assembly language, taking care to use all the
tricks to optimize it for the particular CPU you are running on. If you
can find a way to push the processing into any high-end graphics
processors you might have, that typically will speed it up even more. It
is still, sometimes, possible for the best assembly programmers to just
barely outperform optimizing C compilers, or so I'm told.

If you are willing to set your sights just a little lower, and rather than
aiming for the absolute fastest code possible, settle for code which is
fast enough, the usual technique is to stick to Python. Write different
functions implementing the various methods you can think of, and then time
them with the timeit module. Pick the fastest. Is it fast enough that
performance is satisfactory? If so, then you are done.

Here is a technique that may speed your code up a little: it is quicker to
find local variables than global. So, instead of this:

def main():
    ... code here ...
    while condition:
        flag = isoverlap(t1, t2)
        ... code ...

you can gain a little speed by making a local reference to the function:

def main():
    ... code here ...
    iso = isoverlap  # make a local reference for speed
    while condition:
        flag = iso(t1, t2)
        ... code ...


If your code is still too slow, you might speed it up with Psycho, or you
may need to write a C extension. Either way, you won't know if the code is
fast enough until you actually run it.


-- 
Steven.



From crutcher at gmail.com  Sun Feb 26 14:02:10 2006
From: crutcher at gmail.com (Crutcher)
Date: 26 Feb 2006 11:02:10 -0800
Subject: How to use python regular expression to substitute string value
In-Reply-To: <1140978932.892295.322370@z34g2000cwc.googlegroups.com>
References: <1140978932.892295.322370@z34g2000cwc.googlegroups.com>
Message-ID: <1140980529.969474.15430@t39g2000cwt.googlegroups.com>

You don't really need regexes for this.

Assuming there is no whitespace in any of your values, it should be
really easy to parse the string.

s = 'x:11 y:0 w:760 h:19 area:14440 areaPerCent:0
totalAreaPerCent:-3.08011e+16 type:3 path:///-/1/1'

s.split() # break the string on whitespace
> ['x:11', 'y:0', 'w:760', 'h:19', 'area:14440', 'areaPerCent:0', 'totalAreaPerCent:-3.08011e+16', 'type:3', 'path:///-/1/1']

[ t.split(':',1) for t in s.split() ] # break each term on the first
':'
> [['x', '11'], ['y', '0'], ['w', '760'], ['h', '19'], ['area', '14440'], ['areaPerCent', '0'], ['totalAreaPerCent', '-3.08011e+16'], ['type', '3'], ['path', '///-/1/1']]

d = dict([ t.split(':',1) for t in s.split() ]) # make a dict of the
list
> {'type': '3', 'area': '14440', 'h': '19', 'w': '760', 'areaPerCent': '0', 'y': '0', 'x': '11', 'path': '///-/1/1', 'totalAreaPerCent': '-3.08011e+16'}

Now you can do this:
new_s = 'rect x="%(x)s" y="%(y)s" width="%(w)s" height="%(h)s"' % d
> 'rect x="11" y="0" width="760" height="19"'



From aleaxit at yahoo.com  Sun Feb 12 20:52:26 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 12 Feb 2006 17:52:26 -0800
Subject: Downloading Large Files -- Feedback?
References: <1139773494.245577.102870@g47g2000cwa.googlegroups.com>
	<1hanf3e.1j28qll1hnvr5qN%aleaxit@yahoo.com>
	<1139793676.885331.295390@g14g2000cwa.googlegroups.com>
Message-ID: <1hanqts.1ebz9k41w8qll3N%aleaxit@yahoo.com>

mwt <michaeltaft at gmail.com> wrote:

> Thanks for the explanation. That is exactly what I'm looking for. In a
> way, it's kind of neat that urlopen just *does* it, no questions asked,
> but I'd like to just know the basics, which is what it sounds like
> urlretrieve covers. Excellent. Now, let's see what I can whip up with
> that. 

Yes, I entirely understand your mindset, because mine is so similar: I
prefer using higher-level "just works" abstractions, BUT also want to
understand what's going on "below"... "just in case"!-)

> -- just bought "cookbook" and "nutshell" moments ago btw....

Nice coincidence, and thanks!-)


Alex


From ajsiegel at optonline.com  Tue Feb  7 08:27:17 2006
From: ajsiegel at optonline.com (Arthur)
Date: Tue, 07 Feb 2006 08:27:17 -0500
Subject: Question about idioms for clearing a list
In-Reply-To: <1139300825.858426.12680@o13g2000cwo.googlegroups.com>
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>
Message-ID: <43E8A035.7010709@optonline.com>

Raymond Hettinger wrote:
> 
> There was a pithy Tim Peters quotation to the effect that he was
> unpersuaded by language proposals predicated on some hypothetical
> average programmer not being smart enough to understand something that
> the rest of us find to be basic.

Peters pithy ;)

As someone coming to Python as a well less than the average programmer, 
I agree wholeheartedly with Mr. Peters.

My ability to grok Python to any extent, from that starting point, was 
based on an understanding that it was my responsibility to come to 
Python, not it to me. And concerted, almost obsessive effort, And time.

OTOH - because of exactly these factors - I have actively resented and 
resisted promulgation of the Python is Easy meme.

Pity that this stance has separated me from a sense of belonging to the 
community, which seems to so highly value that meme.

Art


From steve at REMOVETHIScyber.com.au  Tue Feb 14 07:27:14 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Tue, 14 Feb 2006 23:27:14 +1100
Subject: Unexpected behaviour of getattr(obj, __dict__)
References: <pan.2006.02.14.11.36.28.723688@REMOVETHIScyber.com.au>
	<1139919112.714167.203760@f14g2000cwb.googlegroups.com>
Message-ID: <pan.2006.02.14.12.27.13.512357@REMOVETHIScyber.com.au>

On Tue, 14 Feb 2006 04:11:52 -0800, Raymond Hettinger wrote:

> Steven D'Aprano wrote:
>> I came across this unexpected behaviour of getattr for new style classes.
>> Example:
>>
>> >>> class Parrot(object):
>> ...     thing = [1,2,3]
>> ...
>> >>> getattr(Parrot, "thing") is Parrot.thing
>> True
>> >>> getattr(Parrot, "__dict__") is Parrot.__dict__
>> False
>>
>> I would have expected that the object returned by getattr would be the
>> same object as the object returned by standard attribute access.
> 
> The returned object is a wrapper created on-the-fly as needed.  You've
> requested two of them and each wrapper has a different object id but
> wraps an identical source.

[penny drops]

That would certainly explain it.

Is there a canonical list of attributes which are wrapped in this way? I
suppose not... it is probably the sort of thing which is subject to change
as Python evolves.

I knew methods were wrapped, but I didn't know they were wrapped on the
fly, nor did I connect the two phenomena. Thank you for the concise and
simple answer.


-- 
Steven.



From grflanagan at yahoo.co.uk  Mon Feb 20 12:24:47 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 20 Feb 2006 09:24:47 -0800
Subject: Processing text using python
References: <1140451760.998278.90430@g43g2000cwa.googlegroups.com>
Message-ID: <1140456287.363146.10370@o13g2000cwo.googlegroups.com>

nuttydevil wrote:
> Hey everyone! I'm hoping someone will be able to help me, cause I
> haven't had success searching on the web so far... I have large chunks
> of text ( all in a long string) that are currently all in separate
> notebook files. I want to use python to read these strings of text,
> THREE CHARACTERS AT A TIME. (I'm studying the genetic code you see, so
> I need to read and analyse each sequence one codon at a time
> effectively.) Does anyone have any idea of how to do this using python?
>
>
> I'm going to be optimistic and thank you for your help in advance!
> Samantha.


data1 = '''FOOTFALLSECHOINTHEMEMORY
DOWNTHEPASSAGEWHICHWEDIDNOTTAKE
TOWARDSTHEDOORWENEVEROPENED'''

num_codons = len(data1) // 3

codons = [ data1[3*i:3*(i+1)] for i in range( num_codons ) ]

print codons

class Codon(object):
    #__slots__ = ['alpha', 'beta', 'gamma']
    def __init__(self, a, b, c):
        self.alpha = a
        self.beta = b
        self.gamma = c

codons = [ Codon(*codon) for codon in codons ]

print codons[0].alpha, codons[0].beta, codons[0].gamma

###output####

['FOO', 'TFA', 'LLS', 'ECH', 'OIN', 'THE', 'MEM', 'ORY', '\nDO', 'WNT',
'HEP', 'ASS', 'AGE', 'WHI', 'CHW', 'EDI', 'DNO', 'TTA', 'KE\n', 'TOW',
'ARD', 'STH', 'EDO', 'ORW', 'ENE', 'VER', 'OPE', 'NED']
F O O


Gerard



From tjreedy at udel.edu  Tue Feb 21 12:27:33 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 21 Feb 2006 12:27:33 -0500
Subject: Python vs. Lisp -- please explain
References: <mailman.2202.1140493436.27775.python-list@python.org>
	<1140510785.531218.93640@g44g2000cwa.googlegroups.com>
Message-ID: <dtfii3$f9c$1@sea.gmane.org>


"Paul Boddie" <paul at boddie.org.uk> wrote in message 
news:1140510785.531218.93640 at g44g2000cwa.googlegroups.com...
> Well, yes, I suppose you could have something just interpreting
> bytecodes and with no support for parsing and compiling Python the
> language - I suppose PyMite [1, 2] and other similar works are like
> that.
>
>> The the compiler is built into the VM as opposed to a separate tool
>> (like Java) is just an implementation issue.

The presence of the exec statement and the eval function (which is used by 
the input statement) requires the runtime presence of the parser-compiler. 
Removing the latter disables the former features.  This is legitimite when 
not needed or when space is tight, but the result is no longer a full 
implementation.

Terry Jan Reedy





From gaz082 at gmail.com  Wed Feb 15 16:01:54 2006
From: gaz082 at gmail.com (Gaz)
Date: 15 Feb 2006 13:01:54 -0800
Subject: Attached images by plain email.
Message-ID: <1140037314.129890.135970@o13g2000cwo.googlegroups.com>

Hi guys. Im doing a simple CGI form to send data by email. They are for
some technicians on field so they can send daily reports about what
they made. The thing is, i dont know how to send images attached to the
email i generate with sendmail. I put the combos in the form, but i
dont know how to say to sendmail to add them to the email the form
assembles.

Any tips?

Thanks!



From bdesth.quelquechose at free.quelquepart.fr  Sun Feb 19 17:06:58 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 19 Feb 2006 23:06:58 +0100
Subject: general coding issues - coding style...
In-Reply-To: <slrndve8oe.5jb.mac@news.calmar.ws>
References: <slrndve8oe.5jb.mac@news.calmar.ws>
Message-ID: <43f8c846$0$11067$636a55ce@news.free.fr>

calmar a ?crit :
> Hi all,
> 
> since I'm just a 'handicraft'/beginner or so,
> 
> could anybody provide me with some (rough) hints, about how to enhance the code
> here:
> 
> http://calmar.ws/tmp/cal.html

1/ learn OO and get rid of globals.
2/ use dict or list based dispatch instead of long if/elif/elif... clauses
3/ stdout is meant for *normal* program outputs. Errors and verbosity go 
to stderr
4/ triple quoted strings are fine for multiline text
5/ os.path is fine for portable filepath operations
6/ things that dont change during program execution (ie : constants) 
should not be defined inside a function



> Cheers and thanks a lot
> calmar
> 
> 


From fuzzyman at gmail.com  Tue Feb  7 04:27:30 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 7 Feb 2006 01:27:30 -0800
Subject: Detecting line endings
In-Reply-To: <1hacujo.1p81efw1ej38ioN%aleaxit@yahoo.com>
References: <1139236514.022464.319970@g14g2000cwa.googlegroups.com>
	<1hacujo.1p81efw1ej38ioN%aleaxit@yahoo.com>
Message-ID: <1139304450.822250.157460@g14g2000cwa.googlegroups.com>


Alex Martelli wrote:
> Fuzzyman <fuzzyman at gmail.com> wrote:
>
> > Hello all,
> >
> > I'm trying to detect line endings used in text files. I *might* be
> > decoding the files into unicode first (which may be encoded using
>
> Open the file with 'rU' mode, and check the file object's newline
> attribute.
>

Ha, so long as it works with Python 2.2, that makes things a bit
easier.

Rats, I liked that snippet of code (I'm a great fan of list
comprehensions).   :-)

> > My worry is that if '\n' *doesn't* signify a line break on the Mac,
>
> It does, since a few years, since MacOSX is version of Unix to all
> practical intents and purposes.
>

I wondered if that might be the case. I think I've worried about this
more than enough now.

Thanks

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml

> 
> Alex



From DavidPorterHolt at acm.org  Tue Feb 21 11:42:34 2006
From: DavidPorterHolt at acm.org (DavidPorterHolt)
Date: 21 Feb 2006 08:42:34 -0800
Subject: Exceptions
Message-ID: <1140540154.522838.193020@g14g2000cwa.googlegroups.com>

Can anyone explain why the second print statement below (copied from
'Dive Into Python') generates a syntax error? As I understand
exceptions, the except block should handle the exception, and the
following print statement should execute normally.

>>> try:
	fsock = open('/nothere')
except IOError:
	print 'The file does not exist, exiting gracefully'
print 'This line will always print'
SyntaxError: invalid syntax
>>>

Any help will be much appreciated.

Thanks,
David Holt
DavidPorterHolt at acm.org



From __peter__ at web.de  Mon Feb 20 15:03:39 2006
From: __peter__ at web.de (Peter Otten)
Date: Mon, 20 Feb 2006 21:03:39 +0100
Subject: Quesion about the proper use of __slots__
References: <1140424508.393412.79140@o13g2000cwo.googlegroups.com>
	<43f9825e$0$4777$636a55ce@news.free.fr>
	<1140426860.033363.237150@o13g2000cwo.googlegroups.com>
	<dtc219$h0a$01$1@news.t-online.com>
	<1140428016.170547.315710@g47g2000cwa.googlegroups.com>
	<1140432487.272405.297100@f14g2000cwb.googlegroups.com>
	<1140434225.164304.230440@z14g2000cwz.googlegroups.com>
	<dtca02$pn3$03$2@news.t-online.com>
	<08vjv1p05h7g1qhbjnoissnpg91usqflau@4ax.com>
Message-ID: <dtd77b$6cu$03$1@news.t-online.com>

Dennis Lee Bieber wrote:

> On Mon, 20 Feb 2006 12:44:49 +0100, Peter Otten <__peter__ at web.de>
> declaimed the following in comp.lang.python:
> 
> 
>> 
>> I have 256K, by the way.
>>
> Ouch... I pray it is not running some variation of Windows... (My
> TRS-80 Model III/4 [upgraded motherboard, same case] had 128K of RAM is
> a 32K fixed, and three 32K bank-swapped segment -- in 1982). And I had
> 512K in my Amiga A-1000.
> 
> W98SE was just usable on 256M (of highly expensive RDRAM at the time
> -- going from 128M to 256M was $800). On a cold boot I'd have 135K free
> (and that was with the vcache limited!)... A little PhotoShop work would
> suck up the rest easily. And then... the 64K GDI space would get
> trashed...

OK, you all had your laugh now, move on.

Peter, who can't count to 2**you-name-it




From bj_666 at gmx.net  Wed Feb 15 02:44:10 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 15 Feb 2006 08:44:10 +0100
Subject: Which is faster? (if not b in m) or (if m.count(b) > 0)
References: <1139976842.179801.285400@z14g2000cwz.googlegroups.com>
Message-ID: <pan.2006.02.15.07.44.08.876338@gmx.net>

In <1139976842.179801.285400 at z14g2000cwz.googlegroups.com>, Farel wrote:

> Which is Faster in Python and Why?

``if not b in m`` looks at each element of `m` until it finds `b` in it
and stops then.  Assuming `b` is in `m`, otherwise all elements of `m` are
"touched".

``if m.count(b) > 0`` will always goes through all elements of `m` in the
`count()` method.

Ciao,
	Marc 'BlackJack' Rintsch


From ask at me  Wed Feb 15 18:26:21 2006
From: ask at me (AndyL)
Date: Wed, 15 Feb 2006 18:26:21 -0500
Subject: multi/double dispatch, multifunctions once again
Message-ID: <rZOdnZHeI6eGW27eRVn-gg@comcast.com>

Hi,

Where I can find a module supporting that?

A.


From zhangchao19 at hotmail.com  Thu Feb 23 22:36:08 2006
From: zhangchao19 at hotmail.com (Ê÷Éϲä»Ò)
Date: Fri, 24 Feb 2006 11:36:08 +0800
Subject: 'rar' is not recognized as an internal or external command£¿£¿£¿£¿
References: <dtjv4r$ma1$1@news.cn99.com>
Message-ID: <dtm1m0$1eq$1@news.cn99.com>

thank everyone!!!

the code:

import os
import time
source = [r'e:\temp\code',r'e:\temp\domains']
target_dir = r'e:\temp\bak'
target = target_dir+time.strftime('%Y%m%d%H%M%S')+'.rar'
rar_cmd = "D:\\Progra~1\\WinRAR\\rar.exe a -idcdp %s %s" % (target,'
'.join(source))
print rar_cmd
if os.system(rar_cmd) == 0:
   print 'Successful backup to',target
else:
   print 'Backup Failed!'

thanks again!


-- 
????????
"????????" <zhangchao19 at hotmail.com> ????????
news:dtjv4r$ma1$1 at news.cn99.com...
>
> 'rar' is not recognized as an internal or external command,
> operable program or batch file.
>
>
> import os
> import time
> source = [r'e:\temp\code',r'e:\temp\domains']
> target_dir = r'e:\temp\bak'
> target = target_dir+time.strftime('%Y%m%d%H%M%S')+'.rar'
> rar_cmd = "rar a -idcdp %s %s" % (target,' '.join(source))
> print rar_cmd
> if os.system(r'cd D:\Program Files\WinRAR') == 0:
>   if os.system(rar_cmd) == 0:
>     print 'Successful backup to',target
>   else:
>     print 'Backup Failed!'
> else:
>   print 'FAILED!!!'
>
> 'rar' is not recognized as an internal or external command,
> operable program or batch file.
>
> rar a -idcdp e:\temp\bak20060222191139.rar e:\temp\code e:\temp\domains
> Backup Failed!
>
>
> but.........................
>
> D:\>cd D:\Program Files\WinRAR
>
> D:\Program Files\WinRAR>rar a -idcdp e:\temp\bak20060222191139.rar
> e:\temp\code
> e:\temp\domains
>
> Creating archive e:\temp\bak20060222191139.rar
>
> Adding    e:\temp\Code\Code\.classpath
OK
> Adding    e:\temp\Code\Code\.project
OK
> Adding    e:\temp\Code\Code\common\Code.class
OK
> Adding    e:\temp\Code\Code\common\Code.java
OK
> Adding    e:\temp\Code\Code\common
OK
> Adding    e:\temp\Code\Code
OK
> Adding    e:\temp\Code
OK
> Adding    e:\temp\domains\examples.jar
OK
> Adding    e:\temp\domains\medrec.jar
OK
> Adding    e:\temp\domains\wls.jar
OK
> Adding    e:\temp\domains\wlw.jar
OK
> Adding    e:\temp\domains
OK
>
> D:\Program Files\WinRAR>
>
>
>
> why?
>
>
>
>
> -- 
> ????????
>
>




From scott.daniels at acm.org  Sat Feb  4 13:25:04 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sat, 04 Feb 2006 10:25:04 -0800
Subject: re.search slashes
In-Reply-To: <Yj4Ff.746690$x96.167598@attbi_s72>
References: <Yj4Ff.746690$x96.167598@attbi_s72>
Message-ID: <43e4f066$1@nntp0.pdx.net>

pyluke wrote:
> I'm parsing LaTeX document and want to find lines with equations blocked 
> by "\[" and "\]", but not other instances of "\[" like "a & b & c \\[5pt]"
> so, in short, I was to match "\[" but not "\\]" ....  I've tried:
> check_eq = re.compile('(?!\%\s*)\\\\\[')
 > check_eq.search(line)
 > this works in finding the "\[" but also the "\\["

If you are parsing with regular expressions, you are running a marathon.
If you are doing regular expressions without raw strings, you are running
a marathon barefoot.

Notice:  len('(?!\%\s*)\\\\\[') == 13
          len(r'(?!\%\s*)\\\\\[') == 15

> so I would think this would work
> check_eq = re.compile('(?![\%\s*\\\\])\\\\\[')
> check_eq.search(line)
> 
> but it doesn't.  Any tips?
Give us examples that should work and that should not (test cases),
and the proper results of those tests.  Don't make people trying to
help you guess about anything you know.

--Scott David Daniels
scott.daniels at acm.org


From alanmk at hotmail.com  Fri Feb  3 07:08:51 2006
From: alanmk at hotmail.com (Alan Kennedy)
Date: 3 Feb 2006 04:08:51 -0800
Subject: HTMLDocument and Xpath
References: <1138930478.957440.104290@g14g2000cwa.googlegroups.com>
Message-ID: <1138968531.707677.74000@g14g2000cwa.googlegroups.com>

[swilson at acs.on.ca]
> Hi, I want to use xpath to scrape info from a website using pyXML but I
> keep getting no results.
>
> For example, in the following, I want to return the text "Element1" I
> can't get xpath to return anything at all.  What's wrong with this
> code?

Your xpath expression is wrong.

> test = Evaluate('td', doc_node.documentElement)

Try one of the following alternatives, all of which should work.

test = Evaluate('//td', doc_node.documentElement)
test = Evaluate('/html/body/table/tr/td', doc_node.documentElement)
test = Evaluate('/html/body/table/tr/td[1]', doc_node.documentElement)

HTH,

Alan.



From dbpokorny at gmail.com  Tue Feb 21 02:05:38 2006
From: dbpokorny at gmail.com (dbpokorny at gmail.com)
Date: 20 Feb 2006 23:05:38 -0800
Subject: Safe Python Execution
References: <1haudyd.10d1fd6nn4pqhN%aleaxit@yahoo.com>
	<mailman.2020.1140111870.27775.python-list@python.org>
	<1140116270.222360.134430@z14g2000cwz.googlegroups.com>
Message-ID: <1140504598.018118.166780@f14g2000cwb.googlegroups.com>

It looks like untrustedinterpreter has at least two major obstacles to
executing reasonably complex code:

augmented assignment is not supported:
    a.b = 'foo'
is translated into
    __getattr__(a,b) = 'foo'

Second, this is mysterious, but nevertheless...
"""This form of restricted Python assumes that security proxies will be
used to protect assets.  Given this, the only thing that actually
needs to be done differently by the generated code is to:
<some other items>
- Prevent try/except and raise statements. This is mainly because they
  don't work properly in the presense of security proxies.  Try/except
  statements will be made to work in the future.
"""
--Zope-3.2.0/Dependencies/zope.security-Zope-3.2.0/zope.security/untrustedpython/rcompile.txt

Is anyone aware of a more functional but still untrusted python? One
could remove the ability to access pipes & files from regular python,
build it, and launch the resulting python-slave from a (normal python)
master process... However I'm pretty confident that if I did this
myself, I'd leave more than a few glaring security holes for an
ambitious 9-year-old.

Any help appreciated!

David



From sullivanz.pku at gmail.com  Tue Feb 21 00:20:52 2006
From: sullivanz.pku at gmail.com (Sullivan WxPyQtKinter)
Date: 20 Feb 2006 21:20:52 -0800
Subject: Any Tkinker based rich text widget?
In-Reply-To: <mailman.2125.1140360353.27775.python-list@python.org>
References: <1140329900.341774.175600@f14g2000cwb.googlegroups.com>
	<mailman.2125.1140360353.27775.python-list@python.org>
Message-ID: <1140499252.308189.293710@g44g2000cwa.googlegroups.com>

yes, I have tried Text Widget for quite some time. However, its speed
is far from satisfying.

When it holds more than 20,000 characters, it starts to response quite
slow. When you drag your mouse over some text to select, the selection
is usually done after 0.5second or so. My intent to use this widget is
to compose and process report as long as 30 to 60 pages.

Is it the problem of the Text widget or my usage? the following is the
code for testing Text widget. Run it and paste 20,000 characters, and
then it is retardant....

=======Code Start=========
from Tkinter import *
root=Tk()
root.title("Lab Report Editor")

text=Text(root,height=25)
text.grid(row=0,column=0,sticky=N+S+W+E)

root.columnconfigure(0,weight=1)
root.rowconfigure(0,weight=1)
root.mainloop()
===========Code End===============



From jasonsmith008 at charter.net  Tue Feb  7 00:31:18 2006
From: jasonsmith008 at charter.net (jason)
Date: Tue, 7 Feb 2006 00:31:18 -0500
Subject: RPy / R
Message-ID: <kiWFf.507$U35.88@fe02.lga>

Hello:

I installed the following:

python-2.4.2.msi
pywin32-207.win32-py2.4.exe
R-2.2.1-win32.exe
rpy-0.4.6-R-2.0.0-to-2.2.1-py24.win32.exe

on a Windows XP (SP2) box.

When I try to run the following (source: 
http://rpy.sourceforge.net/plotting-with-RPy.html) in IDLE
>>> from rpy import *
>>> x = range(0, 10)
>>> y = [ 2*i for i in x ]
>>> r.plot_default(x, y)

I get a window entitled "pythonw.exe" which says: pythonw.exe has 
encountered a problem and needs to close. We are sorry for the 
inconvenience.

And then in IDLE
>>> ================================ RESTART 
>>> ================================

When try the following test (from 
http://rpy.sourceforge.net/rpy/doc/manual.pdf page 5),

from rpy import *
r.wilcox_test
r.wilcox_test([1,2,3], [4,5,6])

I get for the second line:
 <Robj object at 0x0099D180>
And then for the third line I get the same error.

Is this a setup issue? Thanks for your help.




From steve at REMOVETHIScyber.com.au  Tue Feb  7 17:47:42 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Wed, 08 Feb 2006 09:47:42 +1100
Subject: Question about idioms for clearing a list
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au>
	<ds83kd$98m$1@sea.gmane.org>
	<mailman.1510.1139250471.27775.python-list@python.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<E78Gf.22893$Jd.14515@newssvr25.news.prodigy.net>
	<mailman.1567.1139348019.27775.python-list@python.org>
Message-ID: <pan.2006.02.07.22.47.40.957502@REMOVETHIScyber.com.au>

On Tue, 07 Feb 2006 22:32:40 +0100, Fredrik Lundh wrote:

> are you sure you know Python ?

Oh my, a little tetchy today aren't we?

Obviousness is a subjective matter! It is one thing to say that 9 out of
10 programmers not only discover this technique (by reading the tutorial
perhaps) but remember it, and therefore it is not an issue. It is another
issue altogether to say "When I want to CLEAR a list, I think of DELETING
A SLICE, and anyone who doesn't obviously doesn't know Python."

As for the earlier suggestion that it would be obvious if only I'd done
the tutorial, if you need to be taught something it is hardly obvious
is it? Otherwise "obvious" loses all meaning, and we can say any feature,
no matter how obscure, is obvious if only you'd read the right book, had
the right teacher, taken the right college degree.

I understand that get/set/del of slices is absolutely fundamental to
lists. I understand that lists are not precisely the same as dicts. I
understand that if you read help(list) and see the entry for the __del__
method and extrapolate sufficiently you will come up with del L[:] as a
technique for clearing a list.

But I also see that Python includes convenience methods, like pop and
extend and insert, and it is my opinion is that Python's clarity would be
slightly increased if lists had a clear() method. 

That's a very mild claim, and I don't understand why there is so much
vehemence against the suggestion. It's not like I suggested Python should
get rid of slicing altogether. If it is just "I've had a bad week and I'm
grumpy", then I can understand that -- I've been there and done that. If
it's "I hate the word 'clear' and it fills me with rage that dicts have a
clear method too", then I'll just back away slooowly now.

But if there are good, solid reasons for rejecting *this particular*
(hypothetical) convenience method, then I'd like to hear about them, sans
questions about my ability to program in Python.


Thank you,



-- 
Steven.



From me at privacy.net  Fri Feb 10 22:43:23 2006
From: me at privacy.net (Dan Sommers)
Date: Fri, 10 Feb 2006 22:43:23 -0500
Subject: Yet another GUI toolkit question...
References: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
Message-ID: <m2d5huwof8.fsf@unique.fqdn>

On Fri, 10 Feb 2006 19:16:36 -0500,
Kevin Walzer <sw at wordtech-software.com> wrote:

> For what it's worth, my application has to run on OS X and Windows,
> and will be commercial, so this combination of requirements rules out
> PyGTK/PyQt/just about every other cross-platform GUI toolkit.

According to their respective web sites, both Qt and PyQt have
commercial licenses, and both run on both OS X and Windows.  Is there
another reason you cannot use them?  Usually the concern is the other
way around, that the Qt and PyQt licenses aren't sufficiently free or
Free.

Disclaimer:  I have no financial or business ties to Trolltech or to
Riverbank.

Regards,
Dan

-- 
Dan Sommers
<http://www.tombstonezero.net/dan/>


From scott.daniels at acm.org  Wed Feb  8 10:20:35 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Wed, 08 Feb 2006 07:20:35 -0800
Subject: UnboundMethodType and MethodType
In-Reply-To: <43e9f92c$1_3@newspeer2.tds.net>
References: <dsbl2g$i1b$1@news2.rz.uni-karlsruhe.de>
	<43e9635b$1@nntp0.pdx.net> <43e9f92c$1_3@newspeer2.tds.net>
Message-ID: <43ea0b11$1@nntp0.pdx.net>

Kent Johnson wrote:
> Kirk McDonald wrote:
...
>>  >>> id(B.bar)
>> -1211888788
>>  >>> id(b.bar)
>> -1211888788
>>
>> It's the same function, whether it's bound or not....
> 
> No, it's not the same function. You got the same id because you didn't 
> bind B.bar and b.bar to anything so the id was reused.
> 
>  >>> class B(object):
>  ...   def bar(self): pass
>  ...
>  >>> Bbar = B.bar
>  >>> bbar = B().bar
>  >>> Bbar
> <unbound method B.bar>
>  >>> bbar
> <bound method B.bar of <__main__.B object at 0x008759B0>>
>  >>> id(Bbar)
> 10751312
>  >>> id(bbar)
> 10736624
>  >>> Bbar is bbar
> False
> 
> Kent

To elaborate on this, once 'id' is called, you drop the reference.
This allows quite surprising things like:
 >>> id(7**8) == id(8**7)
True
 >>> a, b = 7**8, 8**7
 >>> id(a) == id(b) # this time there are other references to a and b
False

If you wanted to test the original code for identity match:
 >>> B.bar is B().bar
False
is the appropriate test (the 'is' test holds the identities through
the comparison).

By the by, this is tricky stuff, nobody should expect to understand
it thoroughly without both study and testing.

--Scott David Daniels
scott.daniels at acm.org


From jzgoda at o2.usun.pl  Sun Feb 19 08:11:11 2006
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Sun, 19 Feb 2006 14:11:11 +0100
Subject: How to configure proxy authentication when using urllib2?
In-Reply-To: <1140352929.945363.279200@z14g2000cwz.googlegroups.com>
References: <1140352929.945363.279200@z14g2000cwz.googlegroups.com>
Message-ID: <dt9qq3$a8n$1@atlantis.news.tpi.pl>

Licheng Fang napisa?(a):

> I use a HTTP proxy to connect to Internet. When I run ulropen command I
> get HTTP Error 407: Proxy authorization required. Could anybody tell me
> how to resolve this? Thanks!

You can build and install opener instance, then all urllib2 calls will
use it.

Some information:
http://www.voidspace.org.uk/python/articles/urllib2.shtml#proxies, one
of many cookbook recipes:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/456195.
Generally, there's much more to google on this topic.

-- 
Jarek Zgoda
http://jpa.berlios.de/


From hancock at anansispaceworks.com  Tue Feb 14 20:38:52 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Tue, 14 Feb 2006 19:38:52 -0600
Subject: how do you pronounce 'tuple'?
In-Reply-To: <dsss7u$g0n$1@news.doit.wisc.edu>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
	<mailman.1857.1139863723.27775.python-list@python.org>
	<ieGdnftVlNuA3WzenZ2dnUVZ_t2dnZ2d@speakeasy.net>
	<dsss7u$g0n$1@news.doit.wisc.edu>
Message-ID: <20060214193852.7acd67dd@samwise.anansi>

On Tue, 14 Feb 2006 09:16:18 -0600
Rocco Moretti <roccomoretti at hotpop.com> wrote:

> Erik Max Francis wrote:
> > If a 4-tuple is a quadruple, a 3-tuple is a triple, a 
> > 2-tuple is an pair, then I guess a 1-tuple would be a
> > single.  Granted  that's not nearly as gruesome enough a
> > name to go with the special  lopsided Pythonic creature
> > mentioned above.  I suggest we name it a  hurgledink.
> 
> +1 QOTW

Yeah, +1, definitely.


-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From robert.h.boyd at gmail.com  Mon Feb  6 08:25:31 2006
From: robert.h.boyd at gmail.com (Robert Boyd)
Date: Mon, 6 Feb 2006 08:25:31 -0500
Subject: ActiveGrid and Python Frameworks.
In-Reply-To: <1139131183.773352.147130@g43g2000cwa.googlegroups.com>
References: <1139131183.773352.147130@g43g2000cwa.googlegroups.com>
Message-ID: <e9e3813b0602060525k11615a7v76692b51a31caefc@mail.gmail.com>

On 5 Feb 2006 01:19:43 -0800, Ravi Teja <webraviteja at gmail.com> wrote:
>   Why is no one talking about ActiveGrid, which at least on the surface
> seems to be the most polished way to build web applications in Python
> so far. They have a sound financial backing, $10 million when I last
> heard, made news on non-Python circles, have a relatively friendly
> authoring environment and are probably addressing the enterprise more
> specifically than any other web framework.
>
>   It somehow did not grow on me but I would love to hear what others'
> experiences are compared to other frameworks they use.
>

No one is talking about it because AG themselves are hardly talking
about it, except in the business press, it seems. All that time
"addressing the enterprise" apparently leaves no time for addressing
the developer community. Other recent Python web projects have been
much more committed to buy-in from developers, with sites geared
towards developers.

They once had mailing lists which were dead, and now they have only
SourceForge forums which are fairly quiet. The help forum is answered
quickly and the AG folks on the forums seem congenial enough, but
there's just not much buzz that I've seen. Every now and again I see
an article mentioning them in the same sentence as "LAMP/Web 2.0
replacing tired old Java". But I have not heard anything from people
who've used AG in production work. Maybe the company's really taking
off and I'm just not aware of it.

I've been following AG and trying their App Builder from the
beginning. I was really intrigued by the development environment and
I'd like to see some of that technology (like BPEL and XForms) in
other Python web frameworks, even if they don't include the same
visual editing capabilities. I have not used AG in anything other than
tutorials and attempts at quick mock-ups, but I often ran into
problems when it came to tasks that were a little outside the typical.
This got frustrating. I'd like to hear from others have experienced,
as well.

From deets at nospam.web.de  Thu Feb 16 11:07:37 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 16 Feb 2006 17:07:37 +0100
Subject: Some general questions about using "stdin","stdout"....
References: <mailman.2005.1140100326.27775.python-list@python.org>
Message-ID: <45jmc8F6o3p9U1@uni-berlin.de>

asdsd sir wrote:

> Hi!I'm new in Python and i'd like to ask some general questions about
> stdin,stdout...
> 
> Firstly...
> 
> if we type like something like :
>    cat "file.txt"|python somefile.py
> 
> #somefile.py
>     import sys
>      text=sys.stdin.read()
> 
> 
> ...then "sys.stdin.read()" will read from "cat"s stdout...
> However,if i type inside a program,something like....
> 
> #someprog.py
>     import sys
>    print "hello"|sys.stdin.read()
> 
> .....the screen hangs..why is that?isn't the same situation as "cat"?

Obviously not... The stdin is a read-only file that you can read from the
data that is passed via a pipe to your application. You did tha piping by
using

cat "file.txt" | python somefile.py

That establihes the pipe between cat's stdout(!) and python's stdin. That's
the reason that | is called "pipe" or "pipe-operator" in the SHELL(!)

print "hello"|sys.stdin.read()

OTH is inside python, and | is not the pipe-operator, but the binary
or-operator. Consider this:

>>> print 1 | 2
3

But:
>>> print "hello" | "some other string"
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: unsupported operand type(s) for |: 'str' and 'str'


So you don't write something to stdin by that. Instead it waits endlessly,
trying to read something that is piped to it from the outside. But if that
was the case, it would puke on you with the above error message.

> in addition to this...
> Why can't i "write" to the stdin?
> Isn't it being used as a file object like all the others?
> for example
> sys.stdin.close() or
> open('sys.stdin','w+') or
> sys.stdin.write("something") etc... don't work...

Because it is defined that way. I suggest you read up on unix piping to
grasp the concepts behind it - python only follows these.


Diez


From Dennis.Benzinger at gmx.net  Sun Feb  5 15:53:58 2006
From: Dennis.Benzinger at gmx.net (Dennis Benzinger)
Date: Sun, 05 Feb 2006 21:53:58 +0100
Subject: Strange behavior with os call in cgi script
In-Reply-To: <1139171873.431432.195080@f14g2000cwb.googlegroups.com>
References: <1139171873.431432.195080@f14g2000cwb.googlegroups.com>
Message-ID: <43e665f1$1@news.uni-ulm.de>

sophie_newbie schrieb:
> I have written a cgi script that seems to run perfectly from the
> command line when I simulate some cgi input using
> os.environ['QUERY_STRING'].
> 
> The thing is that when I run it from the browser, one of my os.system
> calls, which gets excecuted fine when running the program in the
> interpreter, doesn't seem to get excecuted, or gets excecuted but does
> nothing.
> 
> Does anyone know whats going on or how I could debug this problem?
 > [...]

Probably the environment is different when your program is executed by 
your web server. So either PATH is wrong and your program is not found 
or some other environment variable is wrong and you could debug it by 
printing the environment in your program.




From paul at boddie.org.uk  Sun Feb 26 07:34:04 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 26 Feb 2006 04:34:04 -0800
Subject: xslt queries in xml to SQL queries
References: <VS6Mf.7461$vC4.7447@clgrps12>
	<1140931098.472396.50620@i39g2000cwa.googlegroups.com>
Message-ID: <1140957244.112245.53620@j33g2000cwa.googlegroups.com>

Crutcher wrote:
> Skipping ahead, let me try to rephrase this.
>
> First, this isn't really a python question, it is SQL, XSLT, and
> program design, but I'll try to answer.

Well, first of all, it's about mapping XPath onto a relational data
model. This is clear from the original posting:

  <xslt:template match="options_table[field='SERVER']">
    <OPTION><xslt:value-of select="name/text()"/></OPTION>
  </xslt:template>

Here, it makes sense to consider instances of options_table elements as
rows in the options_table table, just as described. Perhaps, if field
and name are columns in options_table, I would rather model them using
attributes:

  <xslt:template match="options_table[@field='SERVER']">
    <OPTION><xslt:value-of select="@name"/></OPTION>
  </xslt:template>

Is this possible or wise to do? Well, I did myself write an
XPath-to-SQL query engine, together with a simple "document relational"
mapper in order to be able to execute XPath expressions similar to
those above. However, I don't believe that my code really delivered on
the concept because...

  * Generating efficient sets of queries can be tricky: a simple
    descent into what appears to be an XML document needs
    to involve a lot of joins to enforce the virtual "element
    hierarchy".

  * One has to decide whether to enforce a schema or not: if you don't
    this means that XPath axes like "child" can behave like
    "descendant-or-self". If you do, generating "descendant-or-self"
    queries becomes very difficult (as far as I can tell and remember).

  * The XPath specification states that nodes are returned in document
    order - this is difficult to enforce unless you litter your tables
    with additional information (again as far as I remember).

  * Generating simple DOM structures for simple SQL queries is
    straightforward, but generating them for arbitrarily complicated
    XPath queries mapped to SQL is quite difficult. If you permit axes
    like "ancestor-or-self" and "parent", or have any query that
    returns a node over and over again, it's best to instantiate that
    node only once in order to keep the number of instantiated
    objects low and to more easily test relationships between nodes.
    It's all awkward if not particularly difficult.

> You have templates, they contain general layout stuff, and input
> fields. You are transforming them into HTML pages, and part of what you
> want to do is to expand the enumerated fields with the enumeration
> values at the time of template application.
>
> You read an article about XSLT, and decided that you could use it in
> your app. For some unknown reason, perhaps involving large amounts of
> alcohol, you want to use the syntax of XSLT, but have it actually
> parsed by python, which silently does an SQL querry to give you your
> results.

I don't know what it is with comp.lang.python/python-list these days
and the cheap put-downs. Unless you know the person you're responding
to personally, and thus the above counts as some kind of banter, you
would do better to keep the insults to yourself.

> This is a really, really bad idea. There are many ways to solve your
> problem using XSLT, and though all of them are easy, none of them are
> so simple that I could put them in a post to someone who doesn't know
> XSLT. If you know XSLT, follow the directions below, if you don't, DO
> NOT USE XSLT for this project. And for the love of anything you may
> believe in, don't try to implement a partial XSLT engine in python.

Why not? 4XSLT is in Python, or at least large parts of it were.
Moreover, my XPath query experiments used a variant of PyXML's XPath
library which could quite probably have been integrated with 4XSLT,
although I didn't try it at the time.

[Patterns]

Anyway, I'm not suggesting that the XPath-to-SQL route is the right
way. The various patterns you suggest are easier to comprehend and
require a lot less magic, even if there's a bit more integration to be
done to prepare data for use by the templates. But given the existence
of XML database systems, I don't think the idea of accessing them (or
things pretending to be like them) via XML technologies is outrageous
at all.

Paul



From donn at u.washington.edu  Mon Feb  6 18:43:37 2006
From: donn at u.washington.edu (Donn Cave)
Date: Mon, 06 Feb 2006 15:43:37 -0800
Subject: how to kill a python process?
References: <1139159404.912421.251960@g43g2000cwa.googlegroups.com>
	<slrnduceiv.2t1.grahn+nntp@frailea.sa.invalid>
	<1139170910.513664.169900@o13g2000cwo.googlegroups.com>
	<slrndufjb0.2t1.grahn+nntp@frailea.sa.invalid>
Message-ID: <donn-74A1B4.15433706022006@gnus01.u.washington.edu>

In article <slrndufjb0.2t1.grahn+nntp at frailea.sa.invalid>,
 Jorgen Grahn <grahn+nntp at snipabacken.dyndns.org> wrote:
...
> > It doesn't work on my system; I just get yet another process called
> > python.
> 
> Strange ... the other shebang-able programs (interpreters) I run (/bin/sh,
> perl) work like I described. That's something I expect to be standard
> operating procedure on any Unix (although I haven't spent much time outside
> Linux recently).

Does it depend on the question?  If you have been checking
this with "ps", try "ps -f".  There seem to be a couple of
different versions of the command line, on Linux.

   Donn Cave, donn at u.washington.edu


From max at alcyone.com  Mon Feb 13 23:57:14 2006
From: max at alcyone.com (Erik Max Francis)
Date: Mon, 13 Feb 2006 20:57:14 -0800
Subject: how do you pronounce 'tuple'?
In-Reply-To: <roy-E3EB19.22040713022006@reader2.panix.com>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
	<mailman.1857.1139863723.27775.python-list@python.org>
	<Wj6If.1606$No6.38150@news.tufts.edu> <dsqtq7$mju$1@online.de>
	<ieGdnfpVlNsJ3WzenZ2dnUVZ_t2dnZ2d@speakeasy.net>
	<roy-E3EB19.22040713022006@reader2.panix.com>
Message-ID: <cLmdnXLWG5y3_mzenZ2dnUVZ_tmdnZ2d@speakeasy.net>

Roy Smith wrote:

> A more interesting question is what do you call ()?  A none-tuple?

Yeah, that's at the point where it _really_ departs from anything 
remotely mathematical.  Don't think I've ever heard the occasion to talk 
about 0-tuples in any context, though, so I don't think it's something 
we need to worry about.  I'm sure you'd just call them "empty tuples" or 
"0-tuples" and move on :-).

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   Society attacks early when the individual is helpless.
   -- B.F. Skinner


From avharut at gmail.com  Wed Feb 15 04:22:05 2006
From: avharut at gmail.com (avharut at gmail.com)
Date: 15 Feb 2006 01:22:05 -0800
Subject: a numarray question
Message-ID: <1139995325.462403.126420@z14g2000cwz.googlegroups.com>

hello everyone

would anyone please tell me what is the best (fastest) way of replacing
values in numarray arrays?

lets say i have an array that may contain 0s, and i just want to get
rid of those 0s by replacing them with another number. what would be
the most efficient way to do that?

many thanks in advance!



From roccomoretti at hotpop.com  Wed Feb 22 11:15:56 2006
From: roccomoretti at hotpop.com (Rocco Moretti)
Date: Wed, 22 Feb 2006 10:15:56 -0600
Subject: can't use NetcdfFile
In-Reply-To: <1140617998.563835.136220@g43g2000cwa.googlegroups.com>
References: <1140617998.563835.136220@g43g2000cwa.googlegroups.com>
Message-ID: <dti2nq$a68$1@news.doit.wisc.edu>

vishalm1975 at gmail.com wrote:
> Hi,
> I'm trying to open a Netcdf file using NetcdfFile but I always get an
> import error DLL failed
> even though I've tried using all these:
> 
> import Numeric
> from Scientific.IO.NetCDF import NetCDFFile
> from Scientific.IO import NetCDF
> from Scientific import *
> from Scientific.IO.NetCDF import *

Copy & Pasting the exact error message helps tremendously.

> 
> I've got Scientific,Numeric and numpy installed

Are you sure you have them installed successfully? How did you install 
them? (Precompiled or from source, and if so, with which compiler?) 
IIRC, Scientific doesn't come with the NetCDF, you have to install the 
NetCDF library separately.
(See http://www.unidata.ucar.edu/software/netcdf/ for download.) After 
installing the NetCDF library, you might need to reinstall Scientific to 
  get it to recognize the NetCDF install.

You might also want to check out 
http://dirac.cnrs-orleans.fr/mmtk_wiki/WindowsInstallation - strictly 
speaking, it's installation instructions for MMTK, but you can ignore 
the final steps of installing MMTK, if you want.

If you need further help, you can always try a more specific resource, 
like the MMTK mailing list - 
http://starship.python.net/mailman/listinfo/mmtk (MMTK is written by the 
same person (Konrad Hinsen) as Scientific, and depends on Scientific.)


From fuzzyman at gmail.com  Thu Feb  2 04:39:53 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 2 Feb 2006 01:39:53 -0800
Subject: webbrowser module + urls ending in .py = a security hole?
In-Reply-To: <1138856193.857136.196670@g47g2000cwa.googlegroups.com>
References: <1138593557.824516.116400@g14g2000cwa.googlegroups.com>
	<1138626217.999480.153140@g43g2000cwa.googlegroups.com>
	<1138651762.673682.192210@g43g2000cwa.googlegroups.com>
	<mailman.1242.1138654889.27775.python-list@python.org>
	<1138856193.857136.196670@g47g2000cwa.googlegroups.com>
Message-ID: <1138873193.505531.125600@g49g2000cwa.googlegroups.com>


Blair P. Houghton wrote:
> >Would it be sufficient in your case merely to allow only .html files to
> >be loaded?  Or URLs without .extensions?  Or even just permit only the
> >http: protocol?
>
> Personally, I'm just noodling around with this right now.
> So "my case" is the abstract case.  I think the solution if
> one was needed would be to look at how something like
> Firefox implements script detection and warns about it,
> so all forms of scripts would be rejected.
>
> I did try loading the .py file over a remote connection, and
> it does seem to work as expected that way; i.e., I get a
> browser window with the text of the script.  So the

The server will send it with a  Content-Type set to text/plain - so the
browser knows to treat it as text.

> webbrowser.py module's handling of http:// accesses
> is definitely different from its handling of  file://  accesses.
>

It's worth working out if this is down to webbrowser.py *or* Firefox.
Try launching firefox with the path to the py file and seeing what it
does.

If it is webbrowser.py then it is worth fixing.

All the best,


Fuzzyman
http://www.voidspace.org.uk/python/index.shtml

> --Blair



From spamgoeshere4 at yahoo.com  Fri Feb 24 17:40:33 2006
From: spamgoeshere4 at yahoo.com (rickman)
Date: 24 Feb 2006 14:40:33 -0800
Subject: Is Forth for real?
In-Reply-To: <1140465677.411501.114440@o13g2000cwo.googlegroups.com>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
	<1139754010.067582.214830@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>
	<1v44c3-geo.ln1@lairds.us>
	<1140449909.473421.224250@g14g2000cwa.googlegroups.com>
	<1140465677.411501.114440@o13g2000cwo.googlegroups.com>
Message-ID: <1140820833.633413.286070@z34g2000cwc.googlegroups.com>


fox at ultratechnology.com wrote:
> rickman wrote:
> > The original post seems to be missing, but my answer to the title
> > question is, No, Forth is not real.
> 
> Not for real, for Integer.

:-)



From larry.bates at websafe.com  Fri Feb 24 18:49:48 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Fri, 24 Feb 2006 17:49:48 -0600
Subject: Regular expression fun. Repeated matching of a group Q
In-Reply-To: <1140794885.460929.223080@i39g2000cwa.googlegroups.com>
References: <1140794885.460929.223080@i39g2000cwa.googlegroups.com>
Message-ID: <43FF9B9C.6030700@websafe.com>

matteosartori at gmail.com wrote:
> Hi all,
> 
> I've spent all morning trying to work this one out:
> 
> I've got the following string:
> 
> <td>04/01/2006</td><td>Wednesday</td><td>&nbsp;</td><td>09:14</td><td>12:44</td><td>12:50</td><td>17:58</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>08:14</td>
> 
> from which I'm attempting to extract the date, and the five times from
> into a list. Only the very last time is guaranteed to be there so it
> should also work for a line like:
> 
> <td>03/01/2006</td><td>Tuesday</td><td>Annual_Holiday</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>08:00</td>
> 
> My Python regular expression to match that is currently:
> 
> digs = re.compile(
> r'<td>(\d{2}\/\d{2}\/\d{4})</td>.*?(?:<td>(\d+\:\d+)</td>).*$' )
> 
> which first extracts the date into group 1
> then matches the tags between the date and the first instance of a time
> into group 2
> then matches the first instance of a time into group 3
> but then group 4 grabs all the remaining string.
> 
> I've tried changing the time pattern into
> 
> (?:<td>(\d+\:\d+)</td>)+
> 
>  but that doesn't seem to mean "grab one or more cases of the previous
> regexp."
> 
> Any Python regexp gurus with a hint would be greatly appreciated.
> 
> M@
> 
This works:

import BeautifulSoup

test = '<td>04/01/2006</td>' \
       '<td>Wednesday</td>'  \
       '<td>&nbsp;</td>'     \
       '<td>09:14</td>'      \
       '<td>12:44</td>'      \
       '<td>12:50</td>'      \
       '<td>17:58</td>'      \
       '<td>&nbsp;</td>'     \
       '<td>&nbsp;</td>'     \
       '<td>&nbsp;</td>'     \
       '<td>&nbsp;</td>'     \
       '<td>08:14</td>'

c=BeautifulSoup.BeautifulSoup(test)
times=[]
for i in c.childGenerator():
    if i.contents[0] == "&nbsp;": continue
    times.append(i.contents[0])

date=times.pop(0)
day=times.pop(0)

print "date=", date
print "day=", day
print "times=", times

-Larry Bates


From john.orlando at gmail.com  Thu Feb  9 23:42:24 2006
From: john.orlando at gmail.com (john.orlando at gmail.com)
Date: 9 Feb 2006 20:42:24 -0800
Subject: Simple Tkinter app works in Linux, not in Windows
In-Reply-To: <dsgs5g$d4f$1@daisy.noc.ucla.edu>
References: <1139531183.792405.148600@o13g2000cwo.googlegroups.com>
	<dsgs5g$d4f$1@daisy.noc.ucla.edu>
Message-ID: <1139546543.928446.283090@o13g2000cwo.googlegroups.com>

> I'm inclined to think that its your python installation. It worked for
> me with both the cygwin python (both in the console and in an xterm) and
> it also worked for me with idle using enthought python. I haven't tried
> the active state python.

Thanks for giving it a shot.  I just checked the version of Python I
was using: 2.3.4 under Linux, and 2.4.2 under Windoze.  So there is a
difference here I guess, though I'd be surprised if it were actually
any kind of "fix" between the two versions.

As a side note, under Win, if I don't put the code in a class it seems
to work fine. In other words:
#start code
from Tkinter import *
win = Tk()
img = PhotoImage(file="moon.gif")
can = Canvas(win)
can.create_image(2,2,image=img, anchor=NW)

#no requirement for keeping an instance of the image around here

win.mainloop()
#end code

...and I get a moon displayed in the top-level window.  This got me
wondering if I was misusing the Frame and/or Canvas widget in some
fashion (since obviously there is no Frame in the above snippet).

Any other thoughts out there?

TIA,
John



From noway at sorry.com  Wed Feb 22 20:08:19 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Thu, 23 Feb 2006 01:08:19 GMT
Subject: Little tool - but very big size... :-(
References: <mailman.2211.1140513270.27775.python-list@python.org><quBKf.1339$A83.42251@twister1.libero.it><ecCdnZ2f8MjdXmHenZ2dnUVZ_tSdnZ2d@is.co.za><43FCCBBD.9090807@ghaering.de>
	<mailman.2314.1140642724.27775.python-list@python.org>
Message-ID: <7W7Lf.4168$A83.113448@twister1.libero.it>

Felipe Almeida Lessa wrote:

>> compared to the small wxPython tool that I compressed recently: 2,80
>> MB (2.942.543 Bytes)
>
> What about PyGtk? Does anybody have any figures? I can't test here
> =(...

I have a custom compilation script for PyQt which can package Qt 3.3.5 Core +
OpenGL + Table in a single .pyd of 1.2Mb (compressed). You can add to that the
usual Python overhead (around 1Mb compressed), thanks to having those useless
CJK codecs compiled within python24.dll (sigh!).
-- 
Giovanni Bajo




From neuzhoundxx at yahoo.com  Wed Feb 15 09:33:34 2006
From: neuzhoundxx at yahoo.com (john peter)
Date: Wed, 15 Feb 2006 06:33:34 -0800 (PST)
Subject: file existence checking
Message-ID: <20060215143334.40944.qmail@web36713.mail.mud.yahoo.com>

does anyone have a suggestion on simplest way to check for the existence of a file
  within the same directory where a python script was started without really opening it?
  i've seen some people use this as a mechanism for informing an application of
  an external event, signalling it for example to disable some functionalities,
  or perhaps a thread. Is such an approach a good one? Are there other "simple" approaches that  might be better (if so, why is it/are they better?)

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
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From nir at digitalpeers.com  Wed Feb  8 15:42:07 2006
From: nir at digitalpeers.com (Nir Aides)
Date: Wed, 08 Feb 2006 22:42:07 +0200
Subject: sys.path and unicode folder names
In-Reply-To: <43EA3F20.2020402@v.loewis.de>
References: <43e8c2ae$1@news.bezeqint.net>
	<43e8f3eb$0$7988$9b622d9e@news.freenet.de>
	<43e99e5e@news.bezeqint.net> <43EA3F20.2020402@v.loewis.de>
Message-ID: <43ea541e@news.bezeqint.net>

Actually, I already managed to make a Patch for this problem.
I will post it soon on my website and in this group.

But I find it strange that this problem even exists, and that I could 
not find any workarounds on the Internet.

Nir


Martin v. L?wis wrote:
> Nir Aides wrote:
>> I can not restrict the name to CP_ACP.
>> I am interested in the general case of Unicode.
> 
> So you should implement a patch, and contribute this
> to sf.net/projects/python.
> 
> Regards,
> Martin


From rtilley at vt.edu  Wed Feb  8 16:35:54 2006
From: rtilley at vt.edu (rtilley)
Date: Wed, 08 Feb 2006 16:35:54 -0500
Subject: spell check code
Message-ID: <dsdo82$92q$1@solaris.cc.vt.edu>

What is the most common way to spell check comments in code? Are there 
any idle plugins or modules that do this?

Thanks!


From sybrenUSE at YOURthirdtower.com.imagination  Thu Feb 23 12:10:47 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Thu, 23 Feb 2006 18:10:47 +0100
Subject: Using repr() with escape sequences
References: <1140708756.484933.13390@z14g2000cwz.googlegroups.com>
	<pan.2006.02.23.15.53.28.462638@REMOVETHIScyber.com.au>
	<1140713377.854836.282810@z14g2000cwz.googlegroups.com>
Message-ID: <slrndvrr4n.b9m.sybrenUSE@schuimige.unrealtower.org>

nummertolv enlightened us with:
> myString = "bar\foo\12foobar"

Are the interpretations of the escape characters on purpose?

> How do I print this string so that the output is as below?
>
> bar\foo\12foobar

Why do you want to?

> typing 'print myString' prints the following:
>
> baroo
> foobar

Which is correct.

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From fredrik at pythonware.com  Tue Feb 28 18:54:26 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 1 Mar 2006 00:54:26 +0100
Subject: Rounding up to the nearest exact logarithmic decade
References: <1141165716.023456.318240@u72g2000cwu.googlegroups.com>
	<1141169196.826108.122460@i39g2000cwa.googlegroups.com>
Message-ID: <du2nrk$ti4$1@sea.gmane.org>

johnzenger at gmail.com wrote:

> BTW, are the python-dev guys aware that 10 ** -1 = 0.10000000000000001 ?

http://docs.python.org/tut/node16.html

</F>





From felipe.lessa at gmail.com  Sun Feb 12 08:29:16 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sun, 12 Feb 2006 11:29:16 -0200
Subject: Tracking down memory leaks?
In-Reply-To: <1139749861.949765.282310@z14g2000cwz.googlegroups.com>
References: <1139749861.949765.282310@z14g2000cwz.googlegroups.com>
Message-ID: <1139750956.3967.19.camel@kenshin>

Em Dom, 2006-02-12 ?s 05:11 -0800, MKoool escreveu:
> I have an application with one function called "compute", which given a
> filename, goes through that file and performs various statistical
> analyses.  It uses arrays extensively and loops alot.  it prints the
> results of it's statistical significance tests to standard out.  Since
> the compute function returns and I think no variables of global scope
> are being used, I would think that when it does, all memory returns
> back to the operating system.
> 
> Instead, what I see is that every iteration uses several megs more.
> For example, python uses 52 megs when starting out, it goes through
> several iterations and I'm suddenly using more than 500 megs of ram.
> 
> Does anyone have any pointers on how to figure out what I'm doing
> wrong?

Have you tried to force a garbage collection? Try, for example, running
gc.collect() everytime the function returns. See
http://www.python.org/doc/current/lib/module-gc.html for more details.

> Thanks,
> mohan

Cya,
Felipe.

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From lycka at carmen.se  Mon Feb 13 09:08:41 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Mon, 13 Feb 2006 15:08:41 +0100
Subject: Rethinking the Python tutorial
In-Reply-To: <mailman.1721.1139586567.27775.python-list@python.org>
References: <dsfqv4$shc$1@wake.carmen.se>
	<mailman.1721.1139586567.27775.python-list@python.org>
Message-ID: <dsq3ta$bne$1@wake.carmen.se>

Ed Singleton wrote:
> How about putting the current tutorial into the wiki and seeing if
> people start updating it?  I'm not saying it would work, but it might
> have interesting effects...

There are abviously a lot of ideas in the air concerning on-line
editing of the new python web site, support for user comments in
the docs etc. I hope some of these things will be deployed soon.

Concerning the tutorial, I just felt that the two I mentioned are
the "best of breed", and it might be smarter to give them official
status. I don't see any value in maintaining Guido's tutorial for
all eternity. It's not as if we need backward compatibility in the
tutorial department... I suppose there are some gaps in A Byte Of
Python that needs to be filled. For instance, the discussion on
Unicode seems very thin. I still think it's a better starting point
for the ideal beginners tutorial than the old official tutorial.

I still feel it's a better beginner's tutorial though. Last time I
suggested the standard Python tutorial to someone, she dropped
Python almost at once, since she got the impression that it was
some kind of calculator program, and she wasn't looking for that.

I think there are a lot of potential improvements for Python docs.
The Language Reference is unreadable for mortals, and that means
that there is no standard reference document describing the real
fundamentals in Python, statements and operators. we just have the
tutorial for that.

The best resource in the Python docs is that Library Reference.
As far as I understand, it's not complete, and it could contain
more examples in places, but it's very useful.

The Lanugage Reference seems more like some kind of specification.
I think a *real* Python Language Guide would be great, and it could
still be a fairly short document, even if core Python has grown a
bit in recent versions. The builtins chapter in the Library Reference
(Ch 2) belongs here, and the Std Lib Ref is just for things  we
import. It's really strange to document e.g. string literals and the
string class in different manuals.

I was thinking that maybe some old paper book on Python could be
donated for this purpose, but now it seems that most of the good
ones are going to be reprinted soon, if they aren't already in the
stores. I'm really happy that they are still commercially viable,
but it would have been great if we had gotten one of these goodies
as a starting point. It's hard work to write such good books as
e.g. Martelli and Beazley did.

Of the good books, I just have Beazley's "Python Essential Reference"
1st Ed. nearby, but chapter 2-10 in that shows very well what I
think a Python Language Guide could look like.

BTW... Alex is now employed by a very rich and successful company
that really owes the Python community a lot of gratitude. It's great
that they are paying the salaries for some of the very best Python
people, and let them work some for the community, but perhaps Google
could buy the rights for "Python in a Nutshell" from Martelli/O'Reilly
and donate it do the community? :)


From fredrik at pythonware.com  Sun Feb  5 10:38:59 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 5 Feb 2006 16:38:59 +0100
Subject: New Python.org website ?
References: <c4qdnSebt6zPBCXeRVn-pQ@comcast.com><dpaa87$2oa$1@panix3.panix.com><LN2dnQMoFpiCWyfeRVn-sg@comcast.com><43C4E198.2080107@holdenweb.com>
	<dqksuf$dlm$1@sea.gmane.org><43CE35E5.8000604@pollenation.net>
	<dqnht5$rfq$1@sea.gmane.org><43CF5FBF.5090901@pollenation.net>
	<xcNzf.110403$km.2313@edtnps89><mailman.1435.1139151734.27775.python-list@python.org>
	<1139152661.867723.197160@g14g2000cwa.googlegroups.com>
Message-ID: <ds566l$ok9$1@sea.gmane.org>

Chris Ditze-Stephan wrote:
> > http://pydotorg.dyndns.org:8000

> Have access-problem.
> It's dnynds.org.

no, it's dyndns.org.  did you make that typo in the browser too ?

</F>





From franz.steinhaeusler at gmx.at  Thu Feb 23 10:12:10 2006
From: franz.steinhaeusler at gmx.at (Franz Steinhaeusler)
Date: Thu, 23 Feb 2006 16:12:10 +0100
Subject: regular expresson for Unix and Dos Lineendings wanted
References: <jterv157550g4qd4rosc3a2o8l69gcau8v@4ax.com>
	<1140703941.270934.63050@f14g2000cwb.googlegroups.com>
	<1140705876.531175.240600@z34g2000cwc.googlegroups.com>
	<a7jrv11qt4oh4qeuo5abmafl60lj3pghus@4ax.com>
Message-ID: <84krv1td26omv2gbm9i88r5usss8kp16mq@4ax.com>

On Thu, 23 Feb 2006 15:59:54 +0100, Franz Steinhaeusler
<franz.steinhaeusler at gmx.at> wrote:

>I need it for a file, whose line endings I don't know.
>
>I wrote for DrPython this script:
>(using styled text control and wxPython) and this works,
>but I'm looking for a shorter way:

ah, sorry, I try to make this more clear again:

(DrDocument is instance of a styled text control)

import re
import string

def GetEndOfLineCharacter():
    emode = DrDocument.GetEOLMode()
    if emode == wx.stc.STC_EOL_CR:
      return '\r'
    elif emode == wx.stc.STC_EOL_CRLF:
      return '\r\n'
    return '\n'

text = DrDocument.GetText()

eol = GetEndOfLineCharacter()
regex = re.compile('\s+' + eol, re.MULTILINE)

lines = text.split(eol)
    
new_lines = []
for line in lines:
  result = regex.search(line + eol)
  if result != None:
    end = result.start()
    new_lines.append (line [:end])
  else:
    new_lines.append(line)
    
    
newtext = string.join(new_lines, eol)
DrDocument.SetText(newtext)

-- 
Franz Steinhaeusler


From dananrg at yahoo.com  Mon Feb 27 10:04:46 2006
From: dananrg at yahoo.com (dananrg at yahoo.com)
Date: 27 Feb 2006 07:04:46 -0800
Subject: Best python module for Oracle, but portable to other RDBMSes
In-Reply-To: <1140875323.918086.44890@i40g2000cwc.googlegroups.com>
References: <1140818561.458171.237850@p10g2000cwp.googlegroups.com>
	<1140826717.186051.261430@i39g2000cwa.googlegroups.com>
	<1140875323.918086.44890@i40g2000cwc.googlegroups.com>
Message-ID: <1141052686.707730.68600@t39g2000cwt.googlegroups.com>


How about DBdesigner4 or Dia as free ER diagrammers?


dananrg at yahoo.com wrote:
> Thanks Olivier and Jonathan.
>
> Do either of you, or anyone else, know of a good open source data
> modeling / ER-diagram / CASE tools? I'd like to be able to build
> relatively simple schemas in one open source tool and be able to create
> a database on different platforms as needed (e.g. MySQL, PostgreSQL,
> Oracle, etc).
> 
> Just wondering what's out there.
> 
> Thanks.



From jcoleman at franciscan.edu  Sun Feb 26 09:10:05 2006
From: jcoleman at franciscan.edu (John Coleman)
Date: 26 Feb 2006 06:10:05 -0800
Subject: Is Python a Zen language?
In-Reply-To: <1140931766.200951.321320@t39g2000cwt.googlegroups.com>
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
	<1140931766.200951.321320@t39g2000cwt.googlegroups.com>
Message-ID: <1140963005.123017.90890@t39g2000cwt.googlegroups.com>


Crutcher wrote:
> You are a very silly person. You have tripped so many of my internet
> bullshit triggers that I think perhaps you are trolling. All languages
> alter the way you think. They structure the nature of questions you can
> ask, and problems you can solve.
>
> Do you understand 'Zen', by which I mean, have you devoted at least 5
> years of study (real, 5+ hrs/week studdy) to it? (btw, I have not). If
> your answer is no, then you are just using this to be cool.
>
> And if you can say 'no value judgment is intended by my
> classification', you have absolutely no right to talk about the nature
> of language, let alone go about labeling things 'Zen languages'.
> Honestly, classification is an act of valuation, it requires an
> introspective assesment of your personal language system. This stuff is
> _old_, not new, not novell.
>
> Go read a book.
> Like this one: http://www.aber.ac.uk/media/Documents/S4B/the_book.html

If appearing silly is the price of satisfying your curiousity then so
be it. I would, however, like to point out that there is a well
established usage of the word "Zen" in computer science. A trip to
almost any bookstore will unearth many books with titles like "Zen and
the Art of Cascading Style Sheets", etc. A similar usage appears with
the word "Tao", e.g., "The Tao of Objects". These usages seem to point
to a deep, intuitive understanding that eludes many beginners and is
difficult to put into words. My point is simply that, for some
languages L, "Zen and the art of L" or "The Tao of L" are plausible
titles ("Zen and the Art of Lisp Programming" would be plausible) but
for some languages they wouldn't ("The Tao of Fortran" ?) Do you
disagree? If you do, how would *you* articulate the difference in
culture between something like Scheme and something like Fortran?

I have no doubt that this usage of terms from Eastern Mysticism must be
annoying to someone such as yourself who has actually studied it, but
the genie can't be put back into the bottle. It is no longer really
plausible to be a purist regarding words like "Zen" or "Tao" - it just
makes you appear pedantic.

Hopefully I have tripped less of your "internet bullshit triggers" this
time. If not, you should really adjust your settings.

-John Coleman



From aleaxit at yahoo.com  Tue Feb 14 02:18:56 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 13 Feb 2006 23:18:56 -0800
Subject: Is python very slow compared to C
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
	<1139754010.067582.214830@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>
	<mailman.1785.1139762698.27775.python-list@python.org>
	<pan.2006.02.12.17.18.50.356928@REMOVETHIScyber.com.au>
	<1139793721.739325.235780@z14g2000cwz.googlegroups.com>
	<43F01749.2000601@REMOVEMEcyber.com.au>
	<1139809484.447810.17000@g44g2000cwa.googlegroups.com>
Message-ID: <1haq02x.edwa44e4u7r6N%aleaxit@yahoo.com>

<bonono at gmail.com> wrote:
   ...
> The "=" operator in Python 

...doesn't exist, since '=' is not an operator in Python (just like it
isn't, say, in VB).  But, OK, you mean "assignment".

> is also quite different from many language
> people had experience like C 

Yes, but quite similar to assignment in Java, which is apparently the
most widely taught language nowadays.

> or VB 

Not really, because VB had TWO assignment verbs: LET (assignment as a
copy) and SET (assignment by reference, like Java and Python).  The past
"had" is important, because VB today has (among many other changes,
which overall bring its semantics much closer to what Python all along)
sort of revolutionized the area of assignment... while hiding the big
differences under syntax that's much like that of previous VB versions,
an arrangement that's guaranteed to cause trouble (one of the underlying
reasons why so many people and firms are sticking with the old version,
VB6, and refusing to move to the new one, VB.NET aka VB7; of course,
Microsoft can force the issue, by not selling VB6 any more and
eventually removing all traces of support for it).

> etc. And using the same argument,
> everyone may still be programming in COBOL now.

If Cobol's key underlying concepts had proved satisfactory to the needs
of contemporary software development, as the "class" concepts appears so
far to have, then no doubt Cobol would enjoy yet more widespread
continuing acceptance (instead, while still widely used, it's also
generally seen as being on its long, slow way out).
 
> And if we use market penetration as measure, Perl seems to be easier
> for people ?

Perl historically did gain enormous traction by leveraging the
familiarity effect, "sucking in" its early adopters from the ranks of
sh/ksh, awk, and sed programmers. Of course, that effect was most
important in Perl's early years -- once solidly established, a language
creates its own "familiarity effect".

Javascript has leveraged its early advantage in the Netscape browser to
become the only "universally available" language for client-side "in the
browser" execution, and thus established a foothold in a strong and
growing niche for prototype based, rather than class based, object
models. However, there doesn't appear to be further spreading of such
object models; "big" new languages like C# (and indeed the whole
underlying CLR framework, which also forced the semantics of VB) are
strongly class-based.


Alex


From michele.petrazzo at TOGLIunipex.it  Thu Feb 16 09:16:05 2006
From: michele.petrazzo at TOGLIunipex.it (Michele Petrazzo)
Date: Thu, 16 Feb 2006 15:16:05 +0100
Subject: Visual Report Editor
In-Reply-To: <1140094721.295791.319900@g47g2000cwa.googlegroups.com>
References: <1140094721.295791.319900@g47g2000cwa.googlegroups.com>
Message-ID: <43f48927$0$29102$5fc30a8@news.tiscali.it>

Pawel wrote:
> Hello,

Hi Pawel,

> I plan to make Visual Reporting Editior, a new product for 
> corporate-class systems. Data will be in XML and in my application, 
> designer should be able to make fascinating templates of reports. I 
> will use Python and MSVS 2005 Pro.

What are MSVS 2005 Pro ?

> My question is, which libaries will be useful in my job. I plan to
> buy Qt and make visual layer of application using Qt. I'm making
> businessplan soI have to decide which tool will be useful. Is Qt best
> choice, maybe I should buy something different?

Qt has a "strange" license for a graphical toolkit, it is release under
GPL/commercial license, so if you want to include your new Reporting
Editior into a commercial product, you have to pay a license for it.
Different thing is if you use wx or gtk, that has other, more
"permissive" licenses.

I (my company), for our project, has create a "Reporting Editior" based
on wx, following the pySketch tool, but now has about all the code
rewrite. It has some little problems with the auto-resizeable objects
(text only for now), that, into the engine that should compose the page,
not are displayed correctly.

On the other hand has a lot of worker functions, like:
- model-view framework
- object-like develop, so it's simple to add new drawing objects

- xml read and save
- multi-page size (A4, A3, etc...)
- multi-block (head, title, text [more that one], food, end)
- align-resize object
- infinite undo-redo
- image support
- multi-layer (9 layers)
- text block wrap, align right/left/center vertically/horrizontally
- more other...

Now I haven't the mind and the time for solve the problems, but if you
want to complete it, or help me to do it, I'll send you the code, so
after we'll a new -open source (do you like wxWidgets license? [LGPL] )-
*Visual Reporting Editior*

> 
> Pawel
> 

Michele


From tobfon at gmail.com  Tue Feb 28 04:14:15 2006
From: tobfon at gmail.com (tobfon at gmail.com)
Date: 28 Feb 2006 01:14:15 -0800
Subject: C++ OpenGL rendering, wxPython GUI?
Message-ID: <1141118055.471718.90980@z34g2000cwc.googlegroups.com>

I'm creating a scientific visualization application with rather high
demands on performance. I've created a nice rendering engine for it in
C++/OpenGL and a python interface to the rendering engine. Now I'm
looking to build a GUI in python with the rendering engine as an
integrated window. I will most likely use wxPython for the GUI and I
know it has support for adding an OpenGL canvas.

After looking around in these groups and others it seems to me that
most people doing 3D-applications simply opt to use PyOpenGL. Since my
application uses VBOs, shader programs and similar things this is not
an option for me.

My rendering engine currently uses GLUT for window handling, but what I
want to do is to create the canvas in python for use with wxPython and
then somehow toss it down to C++ for rendering and avoid using GLUT at
all. I've yet to come across an example of how this could be done.

Maybe including wxWidgets in the C++ program and just using the
wxPython-created canvas ID there will somehow be possible? I'll look
into that but any help or ideas are most welcome.

Tobias Forsl?w



From aleaxit at yahoo.com  Thu Feb  2 09:52:39 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Thu, 2 Feb 2006 06:52:39 -0800
Subject: OO conventions
References: <mailman.1334.1138833641.27775.python-list@python.org>
	<pan.2006.02.02.11.08.33.964@REMOVETHIScyber.com.au>
Message-ID: <1ha4cmm.7ho4df1vw3a19N%aleaxit@yahoo.com>

Steven D'Aprano <steve at REMOVETHIScyber.com.au> wrote:
> > image = Image( )
> 
> Now you have an "image" object. What is it?
> 
> Answer: it isn't an image at all, not in the plain English sense. (Or if
> it is, it is an arbitrary "default image" picked by the class designer.)

No doubt (presumably some kind of as-yet blank one).

> > image.read( "myfile.jpg" )
> 
> And now, at long last, the image object actually is an image. So why make
> this a two step process? Whatever the Image() initialization does, why
> can't it be done automatically when you read the file?

"Two-step construct" ("2SC") is a reasonably well-known and widely
useful idiom, and it can serve several kinds of purposes, many but not
all of which are tied to persistence.  For example, to some extent it's
used in Entity Enterprise Javabeans (EJBs): with CMP, instead of having
to create a separate object each time you need a new record from the
database, the container can juggle a pool of objects and reuse each of
them to hold different records at different times, so the number of
beans needed is the number of different records you need to have
_simultaneously_.  The "thread pool" concept can be implemented in a
similar way, although this is less common.  Another field where 2SC is
often used is GUIs; in that case the main motivation is "impedence
matching" between a GUI toolkit (often a cross-platform one) and a given
platform's underlying toolkit.

Python offers good opportunities to implement 2SC "under the covers"
thanks to the split between __new__ and __init__: indeed one can get
tricky, since __new__ need not necessarily perform the first step of 2SC
(it might well return a "scrubbed" object from the pool rather than the
new one).  Unpickling may normally use __setstate__ instead of __init__
(after __new__, anyway) -- that's more flexible and often easier to
arrange than going through getinitargs (which doesn't work for newstyle
classes anyway) or getnewargs (which doesn't work for classic ones).

Of course, the way OOP is normally taught, 2SC sounds like a heresy, but
"out in the real world" it does have some advantages (even though
single-step construction remains the normal approach in most cases).

> But if the class has no natural default state, then it makes no sense to
> create an "empty object" with no data, a "non-image image" so to speak.

Hmmm, it might, actually; that's what __new__ normally does for
instances of mutable classes, so that __init__ or __setstate__ or other
different methods yet, as appropriate, can then make the object
"nonempty" in different ways.


> In other words, if you find yourself writing methods like this:
> 
> class Klass:
>     def foo(self):
>         if self.data is None:
>             raise KlassError("Can't foo an uninitialized Klass object.")
>         else:
>             # do something
> 
> then you are just doing pointless make-work to fit a convention that
> doesn't make sense for your class. 

It does appear to be a code smell, yes.  But protocol semantics may
often require such constraints as "it does not make sense to call x.A
unless x.B has been previously called" or viceversa "it's forbidden to
call x.A if x.B has already been called", and such constraints are
generally implemented through something like the above idiom.

Consider a file object, for example: after you call f.close() any other
method call must raise an error.  The simplest, most natural way to
implement this is very similar to what you just coded, using a
self.closed flag -- a case of "two-step destruction", separating
termination ("close") from finalization (destruction proper).

Reusable objects, that can be born "scrubbed", loaded with some data and
used for a while, then "scrubbed" again (with the data getting persisted
off and the object surviving and going into a reuse-pool), typically
need a flag to know if they're scrubbed or not (or, some other data
member may play double duty, e.g. by being None iff an object is
scrubbed).  All normal methods must then raise if called on a scrubbed
object; code for that purpose may be injected by decorators or a custom
metaclass to reduce the boilerplate and code smells.

Note that I'm not defending the OP's contention -- I've seen no reason
in his post making 2SC/2SD desirable.  I'm just addressing the wider
issue... one I probably wouldn't even cover in "OOP 101", but hold for a
later course, e.g. one on the architecture of persistence frameworks.


Alex


From jasonsmith008 at charter.net  Sun Feb  5 11:45:52 2006
From: jasonsmith008 at charter.net (jason)
Date: Sun, 5 Feb 2006 11:45:52 -0500
Subject: NumPy error
References: <KLnFf.3$ug1.0@fe04.lga> <44mgs1F2to82U1@uni-berlin.de>
Message-ID: <J_pFf.27$LI6.21@fe06.lga>

Thanks.

After executing the first line, I now get:

>>> from scipy.optimize import fmin
Overwriting fft=<function fft at 0x012116F0> from scipy.fftpack.basic (was 
<function fft at 0x011C8A70> from numpy.dft.fftpack)
Overwriting ifft=<function ifft at 0x01211730> from scipy.fftpack.basic (was 
<function inverse_fft at 0x011C8AB0> from numpy.dft.fftpack)

And then I get the following result:

>>> xopt = fmin(rosen, x0)
Optimization terminated successfully.
         Current function value: 0.000066
         Iterations: 141
         Function evaluations: 243

>>> print xopt
[ 0.99910115  0.99820923  0.99646346  0.99297555  0.98600385]

Two questions:
1. does the "overwriting..." message make sense?
I uninstalled scipy and numpy and re-installed them.

2. has the algorithm (accuracy level) changed? the result seems different 
from that reported in
http://www.scipy.org/Wiki/Documentation?action=AttachFile&do=get&target=scipy_tutorial.pdf
on page 12.

Thanks again.

"Diez B. Roggisch" <deets at nospam.web.de> wrote in message 
news:44mgs1F2to82U1 at uni-berlin.de...
> jason wrote:
>
>> Hello:
>>
>> I am using the following versions of Python and packages on Windows XP
>> (SP2):
>>
>> Python 2.4.2
>> NumPy  0.9.4.win32-py2.4
>> SciPy 0.4.4 for Python 2.4 and Pentium 4/SSE2
>
> I fell for that yesterday. Cost me two hours. You have to install NumPy
> 0.9.2. Make sure you cleaned up the site-packages, and if you build stuff
> yourself, a clean rebuild is necessary.
>
> Regards,
>
> Diez 




From reply.in.the.newsgroup at my.address.is.invalid  Sat Feb 18 03:07:24 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Sat, 18 Feb 2006 09:07:24 +0100
Subject: How many web framework for python ?
References: <mailman.2085.1140244423.27775.python-list@python.org>
Message-ID: <4cldv1pi01vrkmfj7v1adpfhkdffvoa6jv@4ax.com>

Bo Yang:
>There are very good web framework for java and ruby ,
>Is there one for python ?

Yes.
http://wiki.python.org/moin/WebProgramming

>I want to write a web framework for python based on
>mod_python as my course homework , could you give some
>advise ?

Write Zope3.

-- 
Ren? Pijlman


From salvatore.didio at wanadoo.fr  Tue Feb  7 06:07:11 2006
From: salvatore.didio at wanadoo.fr (Salvatore)
Date: 7 Feb 2006 03:07:11 -0800
Subject: python
In-Reply-To: <mailman.1539.1139306627.27775.python-list@python.org>
References: <20060206222757.3277.qmail@web25701.mail.ukl.yahoo.com>
	<mailman.1539.1139306627.27775.python-list@python.org>
Message-ID: <1139310431.908915.299400@g43g2000cwa.googlegroups.com>

A new OS in Python :
http://unununium.org/introduction  :-)



From dieter.vanderelst at gmail.com  Wed Feb 15 04:09:39 2006
From: dieter.vanderelst at gmail.com (Dieter Vanderelst)
Date: Wed, 15 Feb 2006 10:09:39 +0100
Subject: using the Filters DLL (image filters)
Message-ID: <43F2EFD3.4090709@gmail.com>

Hello,

I'm trying to access the Filters-Dll provided by the filters-project 
(http://filters.sourceforge.net/index.htm).

Following the advice I got from the Python list -thank you for that-, I 
do this using ctypes 
(http://starship.python.net/crew/theller/ctypes/index.html).

I can seem to access the image filters now provided by the Dll. But 
reading and writing of images is still a problem.
Furthermore, the project is not very well documented. So, I was 
wondering whether there are people on this list that have some 
experience in using the filters Dll. Maybe they could sent me some 
examples of the use of the Dll with Python?

Kind regards,
Dieter



From kay.schluehr at gmx.net  Wed Feb 22 15:23:48 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 22 Feb 2006 12:23:48 -0800
Subject: Python vs. Lisp -- please explain
In-Reply-To: <1140617119.964479.200780@g44g2000cwa.googlegroups.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com> <43fbc788@usenet01.boi.hp.com>
	<87u0ar3gba.fsf@wilson.homeunix.com>
	<pan.2006.02.22.11.35.14.90948@REMOVETHIScyber.com.au>
	<1140612537.685150.68330@o13g2000cwo.googlegroups.com>
	<7xu0arbkwd.fsf@ruckus.brouhaha.com>
	<1140614911.243300.67200@g47g2000cwa.googlegroups.com>
	<1140617119.964479.200780@g44g2000cwa.googlegroups.com>
Message-ID: <1140639827.967115.169180@g44g2000cwa.googlegroups.com>


Paul Boddie wrote:
> Kay Schluehr wrote:
> > Paul Rubin wrote:
> > > "Kay Schluehr" <kay.schluehr at gmx.net> writes:
> > > > I talked to Richard Emslie recently and he told me that the PyPy team
> > > > works on a mechanism to create CPython-extension modules written in
> > > > RPython i.e. a statically translateable subset of Python.
> > >
> > > Sounds great but is that a whole lot different from pyrex?
>
> I've wondered that as well.
>
> > RPython is Python code not a different language. In a sense RPython
> > consists of a set of rules usual Python has to conform to make complete
> > type-inference feasible. Here is an overview of those rules.
> >
> > http://codespeak.net/pypy/dist/pypy/doc/coding-guide.html#restricted-python
>
> But does that make it "proper Python"? Having, for example, only one
> type associated with a name (they use the term "variable", though) at
> any given time makes it more like various statically typed or
> functional languages, although I can fully understand why you'd want
> this restriction.
>
> Paul

I would say yes, it is still "proper Python" in that each RPython
program is also a CPython program. That does not tell us much though,
because a simple calculator providing basic arithmetic operations in
infix notation fits the definition as well. The reason why RPython is
not formally defined may be that it is dedicated to be a maximal
sublanguage of Python that can be accepted by a reasonable
type-inferencer that translates code into a statically typed language.
I find this idea fascinating. Extending the type system by structural
types ( e.g. duck-typing a la C++ ) or algebraic types ( ML -like type
constructors including recursive types ) is a declarative way to extend
the languages power. Another one is extremely-late-binding enabling
arbitrary mutability. Now think for a moment about Guidos idea of
optional type annotations. How would this fit into the whole picture?

Kay



From bonono at gmail.com  Tue Feb 21 03:55:35 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 21 Feb 2006 00:55:35 -0800
Subject: In need of a virtual filesystem / archive
In-Reply-To: <43FAD278.3090508@REMOVEMEcyber.com.au>
References: <1140489584.412886.201420@g47g2000cwa.googlegroups.com>
	<43FAD278.3090508@REMOVEMEcyber.com.au>
Message-ID: <1140512134.921984.103450@g47g2000cwa.googlegroups.com>


Steven D'Aprano wrote:
> I suspect you can pick any two of the following three:
>
> 1. single file
> 2. space used for deleted files is reclaimed
> 3. fast performance
>
> Using a proper database will give you 2 and 3, but at
> the cost of a lot of overhead, and typically a
> relational database is not a single file.
sqlite can give 1-3, it does have overhead but whether it worths it
depends on individual judgement based on features, usage pattern etc..
I think monotone use it.



From aleaxit at yahoo.com  Mon Feb  6 23:41:30 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 6 Feb 2006 20:41:30 -0800
Subject: numeric expression from string?
References: <mailman.1413.1139061291.27775.python-list@python.org>
	<pan.2006.02.04.14.51.46.770998@REMOVETHIScyber.com.au>
	<mailman.1481.1139224853.27775.python-list@python.org>
Message-ID: <1hacuro.1uslygvpenquaN%aleaxit@yahoo.com>

Brian Blais <bblais at bryant.edu> wrote:

> someone might accidentally do damage to their system with an unchecked eval.

Nah, it takes malice and deliberation to damage a system from an eval.


Alex


From collinw at gmail.com  Sun Feb 12 15:51:10 2006
From: collinw at gmail.com (Collin Winter)
Date: Sun, 12 Feb 2006 21:51:10 +0100
Subject: [ANN] svnmock 0.3 released
Message-ID: <43aa6ff70602121251n7c9141a3h88d520540678df62@mail.gmail.com>

Hello all,

Version 0.3 of `svnmock`, a package for testing Python applications
that use Subversion's Python bindings, has been released. `svnmock`
emulates the entire suite of Python bindings, allowing developers to
ensure that their application is calling the expected API functions
with the expected arguments. In addition, `svnmock` provides
facilities for simulating error conditions that would otherwise be
difficult or impossible to test against.

Last but not least, `svnmock` includes support for tracing API calls,
allowing for quick debugging without the need to mock up an entire
application.

`svnmock` is compatible with all releases of Subversion, including the
just-released 1.3.0.

Where to get it:
#########

functional is available at

http://oakwinter.com/code/svnmock/

and from the Python Package Index at

http://cheeseshop.python.org/pypi/svnmock

Source tarballs are available, as are Python Eggs for Python 2.4 and 2.5.

Release Notes
########

The 0.3 release is primarily a refinement release. Certain parts of
the package have been made much easier to use for the vast majority of
use cases.

A full tutorial and reference manual is available at
http://oakwinter.com/code/svnmock/.

As always, feedback welcome!

Collin Winter


From hinnc at yahoo.com  Tue Feb  7 11:40:47 2006
From: hinnc at yahoo.com (slogging_away)
Date: 7 Feb 2006 08:40:47 -0800
Subject: Too Many if Statements?
Message-ID: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>

Hi - I'm running Python 2.4.2 (#67, Sep 28 2005, 12:41:11) [MSC v.1310
32 bit (Intel)] on win32, and have a script that makes numerous checks
on text files, (configuration files), so discrepancies can be reported.
 The script works fine but it appears that I may have hit a wall with
'if' statements.

Due to the number of checks perfromed by the script on the text files,
(over 500), there are quite a few 'if' statements in the script, (over
1150).  It seems that it is at the point that when I add any additional
'if' statements the script will not run.  No error is produced - it
just returns to the python prompt much the same as when a successful
'Check Module' command is selected.  If I delete some other 'if'
statements the new ones work so it appears that it has hit a limit on
the number of 'if' statements.  This has stunted any further checks for
the script to make on the text files.

Hs anyone ever run into this sort of thing?



From erniedude at gmail.com  Thu Feb  2 17:02:12 2006
From: erniedude at gmail.com (Ernesto)
Date: 2 Feb 2006 14:02:12 -0800
Subject: OS.MKDIR( ) Overwriting previous folder created...
In-Reply-To: <1138916709.368871.174290@z14g2000cwz.googlegroups.com>
References: <1138916342.531311.190570@g14g2000cwa.googlegroups.com>
	<1138916709.368871.174290@z14g2000cwz.googlegroups.com>
Message-ID: <1138917732.693000.280200@g14g2000cwa.googlegroups.com>

NEVERMIND !  Here is the solution...

# ----------------------------------------------------------------
if (os.path.isdir("C:\\MyNewFolder") == 0):
	os.mkdir("C:\\MyNewFolder")
# -----------------------------------------------------------------

thanks



From peter at engcorp.com  Sat Feb  4 09:24:54 2006
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 04 Feb 2006 09:24:54 -0500
Subject: Making Popen items terminate when program ends.
In-Reply-To: <roy-A807F8.21541703022006@reader2.panix.com>
References: <1139011851.330605.262740@g14g2000cwa.googlegroups.com>	<mailman.1403.1139021049.27775.python-list@python.org>
	<roy-A807F8.21541703022006@reader2.panix.com>
Message-ID: <ds2dfd$3uc$1@sea.gmane.org>

Roy Smith wrote:
> In article <mailman.1403.1139021049.27775.python-list at python.org>,
>  Peter Hansen <peter at engcorp.com> wrote:
> 
>>You should 
>>either prefix your string with an "r" (just before the opening quotation 
>>mark) or escape the backslashes (as in use "C:\\Folder..." instead of 
>>just "C:\Folder").
> 
> Of the two alternatives, raw stings are much preferable to escaping 
> backslashes (IMHO).

No, it's definitely preferable to avoid being slashed than it is to get 
stung. <wink>



From mensanator at aol.com  Sat Feb 18 18:38:38 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 18 Feb 2006 15:38:38 -0800
Subject: 2-dimensional data structures
References: <43ss7mF1n4eg5U1@individual.net>
	<mailman.1110.1138311076.27775.python-list@python.org>
	<45pk2dF7o7egU1@individual.net>
Message-ID: <1140305918.863701.82970@f14g2000cwb.googlegroups.com>


anthonyberet wrote:
> Tim Chase wrote:
> >> I want to work on a sudoku brute-forcer, just for fun.
> >
> >
> > Well, as everybody seems to be doing these (self included...), the
> > sudoku solver may become the "hello world" of the new world :)
> >
> >> What is the equivalent way to store data in python? - It isn't obvious
> >> to me how to do it with lists.
> >
> >
> > Several other answers have crossed the list.  I've done it using a
> > dictionary of tuples:
> >
> >     grid = {}
> >     for row in range(1,10):
> >         for col in range(1,10):
> >             grid[(row,col)] = value
> >
> >     item = grid[(3,2)]
> >
> > etc.
> >
> > Seemed fairly quick and worked for me.
> >
> Thanks for the advice (to everyone in the thread).
> I think I will go with nested lists.
> However, I am running into a conceptual problem.
> My approach will be firstly to remove all the impossible digits for a
> square by searching the row and column for other occurances.
>
> However, I wondering how to approach the search of the nine regions of
> the grid. I am thinking of producing another nested list, again 9x9 to
> store the contents of each region, and to update this after each pass
> through -and update of- the main grid (row and column).
>
> I am not sure how to most efficiently identify which region any given
> square on the grid is actually in - any thoughts, for those that have
> done this? - I don't want a massive list of IF conditionals if I can
> avoid it.

Here's another way:


def region_map():
    for row in range(9):
        for col in range(9):
            region = (row/3,col/3)
            print region,
        print

def identify_region(cell):
    return (cell[0]/3,cell[1]/3)

def create_regions():
    regions = {}
    for row in range(9):
        for col in range(9):
            rowcol = (row,col)
            reg = (row/3,col/3)
            if regions.has_key(reg):
                regions[reg].append(rowcol)
            else:
                regions[reg] = [rowcol]
    return regions


grid = [[0,0,6,0,7,0,0,0,0], \
        [0,3,5,4,0,0,0,9,0], \
        [0,0,0,0,0,6,1,2,0], \
        [0,0,0,0,0,3,2,0,8], \
        [0,0,0,0,6,0,0,0,0], \
        [4,0,7,2,0,0,0,0,0], \
        [0,5,2,1,0,0,0,0,0], \
        [0,7,0,0,0,5,9,1,0], \
        [0,0,0,0,4,0,3,0,0]]

print 'the grid:'
for g in grid: print g
print

print 'the region ids:'
region_map()
print

# create the region dictionary
regions = create_regions()

# pick an arbitrary cell
cell = (5,5)
reg_id = identify_region(cell)

print 'cell:',cell,'is in region:',reg_id
print

print 'region',reg_id,'contains:'

reg_data = regions[reg_id]
for c in reg_data:
    print grid[c[0]][c[1]],


"""

the grid:
[0, 0, 6, 0, 7, 0, 0, 0, 0]
[0, 3, 5, 4, 0, 0, 0, 9, 0]
[0, 0, 0, 0, 0, 6, 1, 2, 0]
[0, 0, 0, 0, 0, 3, 2, 0, 8]
[0, 0, 0, 0, 6, 0, 0, 0, 0]
[4, 0, 7, 2, 0, 0, 0, 0, 0]
[0, 5, 2, 1, 0, 0, 0, 0, 0]
[0, 7, 0, 0, 0, 5, 9, 1, 0]
[0, 0, 0, 0, 4, 0, 3, 0, 0]

the region ids:
(0, 0) (0, 0) (0, 0) (0, 1) (0, 1) (0, 1) (0, 2) (0, 2) (0, 2)
(0, 0) (0, 0) (0, 0) (0, 1) (0, 1) (0, 1) (0, 2) (0, 2) (0, 2)
(0, 0) (0, 0) (0, 0) (0, 1) (0, 1) (0, 1) (0, 2) (0, 2) (0, 2)
(1, 0) (1, 0) (1, 0) (1, 1) (1, 1) (1, 1) (1, 2) (1, 2) (1, 2)
(1, 0) (1, 0) (1, 0) (1, 1) (1, 1) (1, 1) (1, 2) (1, 2) (1, 2)
(1, 0) (1, 0) (1, 0) (1, 1) (1, 1) (1, 1) (1, 2) (1, 2) (1, 2)
(2, 0) (2, 0) (2, 0) (2, 1) (2, 1) (2, 1) (2, 2) (2, 2) (2, 2)
(2, 0) (2, 0) (2, 0) (2, 1) (2, 1) (2, 1) (2, 2) (2, 2) (2, 2)
(2, 0) (2, 0) (2, 0) (2, 1) (2, 1) (2, 1) (2, 2) (2, 2) (2, 2)

cell: (5, 5) is in region: (1, 1)

region (1, 1) contains:
0 0 3 0 6 0 2 0 0


"""



From grflanagan at yahoo.co.uk  Wed Feb 22 13:05:43 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 22 Feb 2006 10:05:43 -0800
Subject: No
In-Reply-To: <1140629467.849254.285410@g43g2000cwa.googlegroups.com>
References: <1140534490.873612.64280@g47g2000cwa.googlegroups.com>
	<dtfhv7$css$1@sea.gmane.org>
	<mailman.2265.1140551970.27775.python-list@python.org>
	<1140619645.303344.317890@g14g2000cwa.googlegroups.com>
	<j-x*9gY-q@news.chiark.greenend.org.uk>
	<1140629467.849254.285410@g43g2000cwa.googlegroups.com>
Message-ID: <1140631543.419939.170370@o13g2000cwo.googlegroups.com>


Gaz wrote:
> (the Input type = FILE is in the field)
>
> please check this out
>
> import ftplib
> import os
>
> ...
>
>     def upload(ftp, file):
>         ext = os.path.splitext(file)[1]
>         if ext in (".txt", ".htm", ".html"):
>             ftp.storlines("STOR " + file, open(file))
>         else:
>             ftp.storbinary("STOR " + file, open(file, "rb"), 1024)
>
>     ftp = ftplib.FTP("ftp.XXXX.f2o.org")
>     ftp.login("XXXXX", "XXXXX")
>
>     upload(ftp, "c:\check.jpg")
>
> I'm still getting the file not found error:
>
> http://img153.imageshack.us/img153/2720/error3ps.jpg
>
> I believe the path is kinda wrong or something. But this time, the
> script is supposed to fetch the file from my pc.

Gaz

Google "file upload cgi".

Gerard



From giles_brown at hotmail.com  Thu Feb 23 14:07:50 2006
From: giles_brown at hotmail.com (Giles Brown)
Date: 23 Feb 2006 11:07:50 -0800
Subject: A C-like if statement
In-Reply-To: <dtl04p$5q2$1@reader2.panix.com>
References: <hp-dnY20cusOnGPeRVn-rg@nmt.edu><dtl04p$5q2$1@reader2.panix.com>
Message-ID: <1140721670.638335.23080@v46g2000cwv.googlegroups.com>

But maybe we're talking about string methods so to get an exception
we'd want to use "index" instead of "find".

Giles



From donn at u.washington.edu  Tue Feb 21 13:02:53 2006
From: donn at u.washington.edu (Donn Cave)
Date: Tue, 21 Feb 2006 10:02:53 -0800
Subject: Is there a way to build python without 'posixmodule' ?
References: <1140541438.511237.292410@g14g2000cwa.googlegroups.com>
Message-ID: <donn-B6664D.10025321022006@gnus01.u.washington.edu>

In article <1140541438.511237.292410 at g14g2000cwa.googlegroups.com>,
 "mrstephengross" <mrstephengross at hotmail.com> wrote:

> libpython2.4.a(pystate.o)(.text+0x1e0): In function
> `PyThreadState_New':
> C:/cygwin/home/Administrator/sgross/sage/installer/python/i386-mingw-gcc/Pytho
> n-2.4.2/Python/pystate.c:191:
> undefined reference to `_PyGILState_NoteThreadState'
> ===================================
> 
> It would seem that the python executable is looking for the process
> management functionality that *would* have been supplied by
> posixmodule.o.

Why would it seem that?  Look for a recent thread here about
porting Python to LynxOS.

   Donn Cave, donn at u.washington.edu


From http  Wed Feb  1 20:23:47 2006
From: http (Paul Rubin)
Date: 01 Feb 2006 17:23:47 -0800
Subject: Python vs C for a mail server
References: <mailman.3994.1138546139.27774.python-list@python.org>
	<mailman.1197.1138549204.27775.python-list@python.org>
	<1138573692.600171.49110@f14g2000cwb.googlegroups.com>
	<mailman.1205.1138574433.27775.python-list@python.org>
	<1138579859.563134.89880@f14g2000cwb.googlegroups.com>
	<1h9xphx.1i4agxjozicz9N%aleax@mail.comcast.net>
	<1138740752.788773.140740@g47g2000cwa.googlegroups.com>
	<drq4tj$ss3$1@wake.carmen.se>
Message-ID: <7xd5i6d04c.fsf@ruckus.brouhaha.com>

Magnus Lycka <lycka at carmen.se> writes:
> Sure, but on the other hand, you are really on your own when you
> avoid the compile time type safety in C++.

But it's almost impossible to avoid.  Does *p point to a valid object,
or to unallocated memory?  C++ has no way to tell this at compile
time.


From jgardner at jonathangardner.net  Fri Feb 24 19:18:37 2006
From: jgardner at jonathangardner.net (Jonathan Gardner)
Date: 24 Feb 2006 16:18:37 -0800
Subject: Best python module for Oracle, but portable to other RDBMSes
In-Reply-To: <1140818561.458171.237850@p10g2000cwp.googlegroups.com>
References: <1140818561.458171.237850@p10g2000cwp.googlegroups.com>
Message-ID: <1140826717.186051.261430@i39g2000cwa.googlegroups.com>

On database portability...

While it is noble to try to have a generic interface to these
libraries, the end result is that the databases are always different
enough that the interface just has to work differently. My experience
in going from one database to another is that you should revisit your
entire database interface anyway. (I remember going from Sybase to
Oracle when we had Perl's DBI way back when. It was still very, very
messy.)

So, pick a good module, learn it inside and out, and plan on using a
completely different module if you use a different database, with
perhaps at least a slightly different interface.



From escalation746 at yahoo.com  Mon Feb 27 14:50:35 2006
From: escalation746 at yahoo.com (robin)
Date: Mon, 27 Feb 2006 19:50:35 +0000
Subject: How many web framework for python ?
References: <mailman.2085.1140244423.27775.python-list@python.org>	<43f8718e$0$7344$626a54ce@news.free.fr>	<1hazzon.19mvhkv6sr8wiN%aleaxit@yahoo.com>	<43f9c518$0$3317$636a55ce@news.free.fr>
	<1hb1t62.hp67bf1jzs91cN%aleaxit@yahoo.com>
	<mailman.2173.1140454320.27775.python-list@python.org>
Message-ID: <vpl6021bppf9v5k40u0sqnbsu1pd1o77jd@4ax.com>

Steve Holden <steve at holdenweb.com> wrote:

>Damn. More reading ...

Even more reading as of tomorrow, when I get my Web Application
Framework article up on my blog.

Even listing the vast number of frameworks & toolkits out there is
daunting, so I figured I may as well share my own outlook.

And FWIW, I have abandoned my own contribution, so that's one less out
in the wild!

-----
robin
noisetheatre.blogspot.com


From markscala at gmail.com  Fri Feb 10 12:57:01 2006
From: markscala at gmail.com (markscala at gmail.com)
Date: 10 Feb 2006 09:57:01 -0800
Subject: is there a better way?
Message-ID: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>

Problem:

You have a list of unknown length, such as this: list =
[X,X,X,O,O,O,O].  You want to extract all and only the X's.  You know
the X's are all up front and you know that the item after the last X is
an O, or that the list ends with an X.  There are never O's between
X's.

I have been using something like this:
_____________________

while list[0] != O:
    storage.append(list[0])
    list.pop(0)
    if len(list) == 0:
        break
_____________________

But this seems ugly to me, and using "while" give me the heebies.  Is
there a better approach?

hope this is clear.
thanks



From duncanm255 at hotmail.com  Tue Feb 28 16:04:37 2006
From: duncanm255 at hotmail.com (D)
Date: 28 Feb 2006 13:04:37 -0800
Subject: Py2exe
Message-ID: <1141160676.947534.123630@t39g2000cwt.googlegroups.com>

I have a simple client/server file server app that I would like to
convert to a single .exe.  The client is just uses Tkinter and displays
a simple GUI.  The server has no GUI and just listens for and processes
connections.  How can I convert these 2 files to an .exe, while
enabling the server app to register as a Windows service?  Thanks.

Doug



From sbaush at gmail.com  Mon Feb  6 04:24:35 2006
From: sbaush at gmail.com (Sbaush)
Date: Mon, 6 Feb 2006 10:24:35 +0100
Subject: [wxPython-users] Problem in threading
In-Reply-To: <20060202075431.10C1.JCARLSON@uci.edu>
References: <fc5d4c490602020623j1d26d4c5x@mail.gmail.com>
	<20060202075431.10C1.JCARLSON@uci.edu>
Message-ID: <fc5d4c490602060124w3da73082r@mail.gmail.com>

oops...
I tried it but i got a bad segmentation fault!!
Is really a good threading implementation?

2006/2/2, Josiah Carlson <jcarlson at uci.edu>:
>
>
> My response is at the end.
>
> Sbaush <sbaush at gmail.com> wrote:
> > Hi all.
> > I've a problem with thread in python.
> > My applications has a GUI that has some button.
> > I've a MVC-like architecture.
> > If i click on a button there is this effect:
> >
> > view.button_1_delete.Bind(EVT_BUTTON,self.OnDelete)
> > view.button_1_list.Bind(EVT_BUTTON,self.OnList)
> >
> > def OnDelete(self, evt):
> >         self.presenter.updateModel("delete")
> > def OnList(self, evt):
> >         self.presenter.updateModel("list")
> >
> > Probably you image that the boss of this program is updateModel
> function.
> > this function has this code:
> >
> > def updateModel(self,Type):
> >         iptType=Type
> >         self.readGUI(iptType)  # This function takes the request info
> from
> > GUI
> >         packet=self.ipt_writeXML(iptType) # Put info in XML string
> >         self.sender.send(packet) #Send the XML string
> >         (xmlresponse,hostfrom)=self.receiver.receive() # Receive a XML
> > string response from agent and the IP of agent
> >         self.iptResponse.run(xmlresponse,hostfrom) # view response in a
> > separate view.
> >
> > Now it works great, but there is a big problem: my app wait for response
> > before allow user to do another request.
> > I thought that with threads it could works perfectly.
> > I tried to apply threads but without any good result.
> > Have you idea how can i do it and how can i apply thread to it?
>
> import wx
> import wx.lib.newevent
> import threading
>
> ResponseEvent, EVT_RESPONSE = wx.lib.newevent.NewEvent()
>
> ...
>     def __init__(self, ...):
>         ...
>         self.Bind(EVT_RESPONSE, self.GotResponse, self)
>         ...
>
>     def _updateModel(self, Type):
>         iptType=Type
>         self.readGUI(iptType)
>         packet=self.ipt_writeXML(iptType)
>         self.sender.send(packet)
>         (xmlresponse,hostfrom)=self.receiver.receive()
>         wx.PostEvent(self,
>              ResponseEvent(xml=xmlresponse,
>                            host=hostfrom))
>
>     def updateModel(self, Type):
>         threading.Thread(target=self._updateModel,
>                           args=(Type,)).start()
>
>     def GotResponse(self, evt):
>         self.iptResponse.run(evt.xml, xml.host)
>     ...
>
>
> - Josiah
>
>


--
Sbaush
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From rudy.schockaert at gmail.com  Fri Feb 24 02:03:20 2006
From: rudy.schockaert at gmail.com (Rudy Schockaert)
Date: Fri, 24 Feb 2006 08:03:20 +0100
Subject: CSV module and UNICODE
In-Reply-To: <17406.29177.961198.341562@montanaro.dyndns.org>
References: <60987dac0602230253q3154866erff6b0a4f26b50378@mail.gmail.com>
	<17406.29177.961198.341562@montanaro.dyndns.org>
Message-ID: <60987dac0602232303t33435d03gd004e1005a2ffdd9@mail.gmail.com>

Thanks a lot Skip. Sure that this will help.

Learned two things: how to do it and to look at the docs for 2.5 also.

These samples are not in the 2.4.2 reference guide.

Rudy

On 2/24/06, skip at pobox.com <skip at pobox.com> wrote:
>
>
>     Rudy> I'm having problems writing unicode to a csv file.
>     Rudy> I use the following code:
>     ...
>
> Have you tried the example UnicodeReader and UnicodeWriter classes in the
> module documentation:
>
>     http://www.python.org/dev/doc/devel/lib/node631.html
>
> While the csv module is 8-bit clean it knows nothing about Unicode, so
> your
> Unicode data has to be encoded before it hits the csv module code.  Your
> code is expecting the Unicode to go through the csv module and be encoded
> to
> utf-8 downstream in the by the eventual file object.
>
> If there are people reading this who would like to tackle something for
> Python 2.5, I am sure a patch that Unicodifies the csv module would be
> welcome.
>
> Skip
>



--
It is not economical to go to bed early to save the candles if the result is
twins. - Chinese Proverb
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From peter at engcorp.com  Sat Feb  4 18:55:32 2006
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 04 Feb 2006 18:55:32 -0500
Subject: Thread imbalance
In-Reply-To: <ds3d35$mo6$2@bagan.srce.hr>
References: <1138912272.382474.13170@g44g2000cwa.googlegroups.com>
	<ds3d35$mo6$2@bagan.srce.hr>
Message-ID: <ds3etb$gus$1@sea.gmane.org>

Ivan Voras wrote:
> Tuvas wrote:
>>waits for a lul in the computing process. How can I ensure that this
>>does not happen? This thread uses little processing power, so it could
>>be set to a high priority, if there is a way to do this. Thanks!
> 
> Python is bad for concurrently executing/computing threads, but it 
> shouldn't be that bad - do you have lots of compute-intensive threads?

Just in case anyone coming along in the future reads this statement, for 
the record I'd like to say this is obviously a matter of opinion or 
interpretation, since in my view Python is *excellent* for threads 
(which are generally considered "concurrently executing", so I think 
that adjective is redundant, too).

Ivan, what makes you say that Python is bad for threads?  Did the 
qualifcation "concurrently executing/computing" have some significance 
that I missed?

-Peter



From doug.bromley at gmail.com  Tue Feb 14 04:16:38 2006
From: doug.bromley at gmail.com (Doug Bromley)
Date: Tue, 14 Feb 2006 09:16:38 +0000
Subject: Jedit
In-Reply-To: <ziggy-358301.20045813022006@netnews.asp.att.net>
References: <ziggy-358301.20045813022006@netnews.asp.att.net>
Message-ID: <288425520602140116l7e81759qc8f3af487f7e859f@mail.gmail.com>

I've often wondered this.  I was thinking more along the lines of a
scriptable Python editor like Emacs.

The only thing I've noticed is:
CUTE - *nix only. - (http://cute.sourceforge.net/)
PyEditor - (http://www.rexx.com/~dkuhlman/pyeditor_howto.html)
ViImproved - (http://wiki.python.org/moin/ViImproved)
PythonCardEditor - (http://wiki.wxpython.org/index.cgi/PythonCardEditor)

On 2/14/06, ziggy <ziggy at fakedaddress.com> wrote:
> Just wondering if there is something out there like Jedit, but written
> in python ( not just supporting, but actually written in it.. )
>
> Nothing large like Stanzi's or Boa.. Just something quick and simple,
> with code completion, and a debugger..
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From scott.daniels at acm.org  Thu Feb  9 08:47:25 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Thu, 09 Feb 2006 05:47:25 -0800
Subject: Using ioctl
In-Reply-To: <1139479777.062683.85340@g47g2000cwa.googlegroups.com>
References: <1139479777.062683.85340@g47g2000cwa.googlegroups.com>
Message-ID: <43eb46b1$1@nntp0.pdx.net>

klappnase at web.de wrote:
>From reading the fcntl module's docs, I came to the following solution:
> 
>     try:
>         f = array.array('h', [0])
>         fcntl.ioctl(audio_fd, ossaudiodev.SNDCTL_DSP_GETBLKSIZE, f, 1)
>         frag_size = f.tolist()[0]
>     except:
>         frag_size = -1
>     if frag_size <= 0:
>         frag_size = 4096
> 
> I would feel more confident if anyone could explain how ioctl is supposed
 > to be used ( I also felt that I should use the try...except block for 
the
 > call in case it fails, but I don't have an idea "except *what*").
Fairly normal practice is to wait for a failure (or try to instigate
one) _without_ the try: ... except: ..., and then use the one you get.
Or, you could go for IOError, which sounds right to me.  remember your
current "except:" is catching any attempt at KeyBoardEscape (Control-C,
Control-Break, and such like).

--Scott David Daniels
scott.daniels at acm.org


From yejuan_1204 at yahoo.com.cn  Wed Feb  1 09:47:20 2006
From: yejuan_1204 at yahoo.com.cn (ye juan)
Date: Wed, 1 Feb 2006 22:47:20 +0800 (CST)
Subject: load module named "datetime" and change the directory of output file?
Message-ID: <20060201144720.73754.qmail@web15010.mail.cnb.yahoo.com>

Hi, all
  
I have some questions to ask:

1. How can I add a standard module named "datetime" in
Jython when the error happens :"Traceback (innermost
last):
  File "C:\python\test.py", line 3, in ?
ImportError: no module named datetime "
 The line 3 is writen: "from datetime import datetime,
tzinfor"

2. I hope test.py outputs a file like test.txt, but I
want to change the directory of the result file named
test.txt. for example, the result is in
c:\python\test.txt, but I want to put it in
c:\python\result\test.txt. How can I change the
directory in java?

Thanks for your answer!

Sincerely,

Erica






		
___________________________________________________________ 
?????????????????????????? 
http://cn.photos.yahoo.com


From joanmikel at gmail.com  Fri Feb 10 06:51:21 2006
From: joanmikel at gmail.com (Shanon)
Date: Fri, 10 Feb 2006 03:51:21 -0800 (PST)
Subject: Thread Dump of a python process
In-Reply-To: <dsflkk$k69$1@sea.gmane.org>
References: <2840609.post@talk.nabble.com> <dsflkk$k69$1@sea.gmane.org>
Message-ID: <2868401.post@talk.nabble.com>


Thank you for your info. Now I have read that a simple call os.getpid()
returned the linux identifier of the thread in latest python versions, but
I'm using Python 2.3 and 2.4 and this call returns always the same id 
I only want to take the pid of the thread but isn't as easier as it seems.
--
View this message in context: http://www.nabble.com/Thread-Dump-of-a-python-process-t1089322.html#a2868401
Sent from the Python - python-list forum at Nabble.com.



From donn at u.washington.edu  Fri Feb  3 13:47:48 2006
From: donn at u.washington.edu (Donn Cave)
Date: Fri, 03 Feb 2006 10:47:48 -0800
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<donn-C3B8DF.14535302022006@gnus01.u.washington.edu>
	<1138926741.052843.169270@z14g2000cwz.googlegroups.com>
	<donn-AC8404.17325802022006@gnus01.u.washington.edu>
	<1138965780.698016.95590@o13g2000cwo.googlegroups.com>
Message-ID: <donn-442117.10474803022006@gnus01.u.washington.edu>

In article <1138965780.698016.95590 at o13g2000cwo.googlegroups.com>,
 n.estner at gmx.de wrote:

> > That usage (self is second parameter to B.test) is bound
> > to cause trouble in general, but in this case doesn't have
> > any effect I can see.  The function call "test" would be
> > resolved from its first parameter, instance of A, and that
> > function would return 1.  One of us is missing something
> > here, could be me.
> 
> Probably my example wasn't clear, let's try another:
> 
>   class A:
>     def test(a, **kwargs): return 1
>   class B:
>     def test(b, **kwargs): return 2
>   test(a=A(), b=B())
> 
> "self" isn't a keyword, so nothing should forbid this code. What is the
> interpreter to do if it stumbles across this "test" call? I mean,
> named-argument lookup is a tricky thing even if you do know what
> function you're calling. If this would depend on one of the parameters,
> I think it would become completely unintelligible. (you can think of
> more complex examples yourself)

Still see no problem.  Of course, it goes without saying that
Python 2.4 doesn't work this way, but given that it's theoretically
possible for f(a) to be resolved similarly to a.f, then I really
do not see what you're seeing here.  The kwargs parameter appears
irrelevant from where I'm sitting.

> > That's exactly the problem, it doesn't read from left to right,
> > because we swap back and forth between function(parameter and
> > parameter.function notation.
> 
> That's because they're doing two different things: object.method() does
> an attribute lookup, while function(parameter) looks for the function
> in the current scope.

But current scope is actually a compound lookup - function scope,
global scope etc.  Generalize it to object scope, and then you
can have a notation that expresses these things consistently - QED.

   Donn Cave, donn at u.washington.edu


From bignose+hates-spam at benfinney.id.au  Mon Feb 27 19:52:22 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 28 Feb 2006 11:52:22 +1100
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>
	<4402AB7F.7070804@REMOVEMEcyber.com.au>
	<7xzmkdxkce.fsf@ruckus.brouhaha.com>
Message-ID: <87u0akxq2h.fsf@rose.polar.local>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
> Hmm, I also see the PEP doesn't specify what's supposed to happen with
>
>   Weekdays = enum('sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat')
>   Solar_system = enum('sun', 'mercury', 'venus', 'earth',)  # etc.
>   print Weekdays.sun == Solar_system.sun
>
> so that's another shortcoming with the PEP. 

The PEP text specifies::

    Values within an enumeration cannot be meaningfully compared
    except with values from the same enumeration.  The comparison
    operation functions return ``NotImplemented`` when a value from an
    enumeration is compared against any value not from the same
    enumeration or of a different type

The Python parser knows what to do when a comparison returns
NotImplemented.

-- 
 \           "It ain't so much the things we don't know that get us in |
  `\      trouble. It's the things we know that ain't so."  -- Artemus |
_o__)                                  Ward (1834-67), U.S. journalist |
Ben Finney


From gene.tani at gmail.com  Sun Feb  5 12:39:18 2006
From: gene.tani at gmail.com (gene tani)
Date: 5 Feb 2006 09:39:18 -0800
Subject: Compiling
In-Reply-To: <mailman.1387.1138986082.27775.python-list@python.org>
References: <mailman.1387.1138986082.27775.python-list@python.org>
Message-ID: <1139161158.441166.295150@g47g2000cwa.googlegroups.com>


Simon Faulkner wrote:
> Pardon me if this has been done to death but I can't find a simple
> explanation.
>
> I love Python for it's ease and speed of development especially for the
> "Programming Challenged" like me but why hasn't someone written a
> compiler for Python?
>
> I guess it's not that simple eh?
>
> Simon

read Brett Cannon's thesis about type inference

http://www.ocf.berkeley.edu/~bac/thesis.pdf



From fredrik at pythonware.com  Thu Feb  9 09:19:29 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 9 Feb 2006 15:19:29 +0100
Subject: Getting Tkinter Text contents before destruction
References: <p4KdnfDfuth6knXeRVn-jw@nmt.edu>
Message-ID: <dsfj1i$8vc$1@sea.gmane.org>

Bob Greschke wrote:

> I want to grab the contents of a Text widget when the frame it's on gets destroyed.  I tried 
> TextWidget.bind("<Destroy>"... , but the widget is gone before the call gets made, and I'd really 
> hate to do something with the function that gets called with TextWidgetsFrame.bind("<Destroy>", 
> ..., since that one function handles all of the frames in the program...or would that even work?
>
> How can I do this?

in what ways can the frame be destroyed ?

assuming that you're talking about user-initiated actions, the most reasonable way
to do this is to implement a WM_DELETE_WINDOW handler on the toplevel
window that the frame is located in, and deal with the text widget in there.  see:

    http://effbot.org/tkinterbook/tkinter-events-and-bindings.htm#protocols

</F> 





From mark at mark-fink.de  Sun Feb  5 06:15:33 2006
From: mark at mark-fink.de (Mark Fink)
Date: 5 Feb 2006 03:15:33 -0800
Subject: rexec in jython??
Message-ID: <1139138133.072742.282710@z14g2000cwz.googlegroups.com>

Hi there,
I at the moment port a library from Python to Jython (at lease I try to
do so :-))). The library uses the Rexec to form a type adapter to cast
parameters given as text into the according Jython type. I learned
rexec is not available in Jython. Is something that is commonly used in
Jython for such tasks available?
In general: how do I find such information by myself?
Best Regards,
Mark



From john_zenger at yahoo.com  Fri Feb 24 07:21:04 2006
From: john_zenger at yahoo.com (John Zenger)
Date: Fri, 24 Feb 2006 07:21:04 -0500
Subject: regular expresson for Unix and Dos Lineendings wanted
In-Reply-To: <dohtv1h996df7h2jhdn3i283gac99rra3b@4ax.com>
References: <jterv157550g4qd4rosc3a2o8l69gcau8v@4ax.com>
	<dohtv1h996df7h2jhdn3i283gac99rra3b@4ax.com>
Message-ID: <X-6dnXQjKfivZ2PeRVn-rQ@comcast.com>

Franz Steinhaeusler wrote:
> 
> Thank you all for the replies.
> But I still don't have a solution.
> 
> Of course with more lines it is possible, 
> but it would be fine to have a "oneliner".

re.sub(r"\s+[\n\r]+", lambda x: x.expand("\g<0>"). \
     lstrip(" \t\f\v"),text).rstrip()

...where "text" is the unsplit block of text with mysterious line-endings.

But I think your code is a lot easier to read.  :)


From peter at engcorp.com  Thu Feb 23 09:00:56 2006
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 23 Feb 2006 09:00:56 -0500
Subject: new wooden door step - fixing and finishing
In-Reply-To: <43FCF655.2090106@gmx.de>
References: <1140598234.454510.281820@g14g2000cwa.googlegroups.com>	<dti985$fhf$1@wake.carmen.se>	<e9e3813b0602221405q744bb3cbl75fc1eeb557de8ed@mail.gmail.com>
	<43FCF655.2090106@gmx.de>
Message-ID: <dtkf6j$mac$2@sea.gmane.org>

Carl Friedrich Bolz wrote:
> I heard that wooden door steps will lead to much lower walking speeds. 

Don't assume: use the timeit module to find out for yourself.

> Isn't a low-level door step out of stone to be prefered?

What did you learn when you Googled for it?

-answering-entirely-in-character-ly y'rs,
  Peter



From paul at boddie.org.uk  Mon Feb 20 06:12:02 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 20 Feb 2006 03:12:02 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<1140382936.808627.40300@o13g2000cwo.googlegroups.com>
	<43f98676$0$31888$636a55ce@news.free.fr>
Message-ID: <1140433921.994720.200870@g44g2000cwa.googlegroups.com>

bruno at modulix wrote:
> Paul Boddie wrote:
> (snip)
>
> > I'm not sure why people get all defensive about Python's
> > interpreted/scripting designation
>
> Because it carries a negative connotation of "slow toy language not
> suitable for 'serious' tasks". Dynamicity apart, CPython's
> implementation is much closer to Java than to bash scripts - but still,
> as soon as you say "interpreted, scripting", peoples think "not serious".

Perhaps we should blame the main man for this confusing label, then
[1]:

"From one perspective you can say Python is a very high-level scripting
language."

Interestingly, with regard to my remark about various criteria being
more appropriate when distinguishing between interactive and
non-interactive languages, we also learn the following:

"From another perspective you can say it's a high-level programming
language that happens to be implemented in a way that emphasizes
interactivity. Python shares some characteristics with scripting
languages, but also shares some characteristics with more traditional
programming languages."

Of course, we've all had this debate before, or rather everyone else
has had this debate before and I've mostly ignored whether people call
Python a scripting language, an interactive language, an agile
language, a dynamic language, an applications programming language, or
whatever. Personally, I rather think that whichever labels one chooses
to attach to a language or platform generally come about from the
success stories one can show people in relation to that language or
platform.

But there are always going to be people who contrast something like
CPython's runtime with the Java virtual machine and ask whether CPython
has, for example as one distinguishing factor, just-in-time compilation
as a generally supported feature, and such people will be genuinely
interested in why such things typically lie outside the principal
runtime development process. People like to find distinctions between
things - sometimes arbitrary ones - and make classifications that allow
them to arrange such things conveniently in their mind. What I find
quite worrying is that while in previous years people have responded to
such discussions with a critical analysis of where Python (or rather
CPython) can be improved, it's now the fashion to just trot out some
response or other which excuses rather than explains the way things
are.

Paul

[1] http://www.artima.com/intv/python.html



From mbirukou at yahoo.com  Tue Feb 21 17:24:15 2006
From: mbirukou at yahoo.com (Mikalai)
Date: 21 Feb 2006 14:24:15 -0800
Subject: Module question
In-Reply-To: <1140559897.172126.43820@o13g2000cwo.googlegroups.com>
References: <1140559897.172126.43820@o13g2000cwo.googlegroups.com>
Message-ID: <1140560655.407740.273490@z14g2000cwz.googlegroups.com>

Tuvas wrote:
> I know this is probably a very simple question, but I am building a
> program that is now at about 2400 lines of code in the main module. I
> need to break it up, however, there are certain variables that I would
> like to use among all of them, namely the TKinter background. It's
> build using tkinter, so, to do anything useful requires having the
> master=Tk() variable portable in every interface. I can't just pass
> this variable, the real way to do it is to have a global variable. How
> can I do this? Thanks!

I will write an example with comments:

# say, this is a file/module foo
x = 1 # this is our variable
# end of module foo
----------------------
# other module, where x is needed
import foo
foo.x  # here you have it
# end
----------------------

It is all simple, but you need to have proper hierarchical import-ing.
You are splitting a file, which has a hierarchical order (count lines),
so writting proper importing is possible at least in principle.

Mikalai



From steve at REMOVETHIScyber.com.au  Fri Feb  3 07:29:56 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 03 Feb 2006 23:29:56 +1100
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<donn-C3B8DF.14535302022006@gnus01.u.washington.edu>
	<1138926741.052843.169270@z14g2000cwz.googlegroups.com>
	<donn-AC8404.17325802022006@gnus01.u.washington.edu>
	<1138965780.698016.95590@o13g2000cwo.googlegroups.com>
	<pan.2006.02.03.11.57.35.210525@REMOVETHIScyber.com.au>
	<1138968873.280730.130210@g47g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.03.12.29.56.35624@REMOVETHIScyber.com.au>

On Fri, 03 Feb 2006 04:14:33 -0800, n.estner wrote:

[snip]

>> Since namespaces are critical to Python, your test code is a problem that
>> just cannot happen in Python. It is a non-issue. Python will not get
>> confused between the two definitions of test.
> 
> I've been answering to Donn Cave's suggestion. Read it, and you will
> understand what I mean.

Your reply came through as I was writing my reply, and it does help
explain your position better.

>> As near as I can tell, your original complaint might be solved simply: it
>> seems to me that you are concerned about that extraneous "self" parameter
>> for methods that don't need it:
> 
> No, I wasn't talking about functions that don't use the "self"
> parameter. I rarely ever have such functions. I just tried to make the
> example as short as possible.

I understand that now :-)



-- 
Steven.



From martin at v.loewis.de  Sat Feb 11 10:28:06 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 11 Feb 2006 16:28:06 +0100
Subject: Netstat in python. Does it's possible?
In-Reply-To: <s1mHf.5180$9G6.428@tornado.fastwebnet.it>
References: <s1mHf.5180$9G6.428@tornado.fastwebnet.it>
Message-ID: <43EE0286.5020409@v.loewis.de>

billie wrote:
> Hi all. I don't know if Python is good for this kind of jobs but I'm 
> wondering if it's possible emulate the "netstat" command in Python.

As a general recommendation, use strace(1) to answer this kind of
question. Run "strace -o tmp netstat", then inspect tmp to find out
how netstat obtained the information it reported.

As Sybren suggests, this can all be answered from /proc. For a
process you are interested in, list /proc/<pid>/fd (using os.listdir),
then read the contents of all links (using os.readlink). If the link
value starts with "[socket:", it's a socket. Then search
/proc/net/tcp for the ID. The line containing the ID will have
the information you want.

Regards,
Martin


From python at rcn.com  Tue Feb 14 07:11:52 2006
From: python at rcn.com (Raymond Hettinger)
Date: 14 Feb 2006 04:11:52 -0800
Subject: Unexpected behaviour of getattr(obj, __dict__)
References: <pan.2006.02.14.11.36.28.723688@REMOVETHIScyber.com.au>
Message-ID: <1139919112.714167.203760@f14g2000cwb.googlegroups.com>

Steven D'Aprano wrote:
> I came across this unexpected behaviour of getattr for new style classes.
> Example:
>
> >>> class Parrot(object):
> ...     thing = [1,2,3]
> ...
> >>> getattr(Parrot, "thing") is Parrot.thing
> True
> >>> getattr(Parrot, "__dict__") is Parrot.__dict__
> False
>
> I would have expected that the object returned by getattr would be the
> same object as the object returned by standard attribute access.

The returned object is a wrapper created on-the-fly as needed.  You've
requested two of them and each wrapper has a different object id but
wraps an identical source.

Contemplate this for a bit:

>>> class Parrot(object):
	thing = [1,2,3]
	def f(self): pass

>>> getattr(Parrot, 'f') is getattr(Parrot, 'f')
False
>>> getattr(Parrot, '__dict__') is getattr(Parrot, '__dict__')
False


The reason why is evident when you check the object representation.  It
shows that your lookup returned a wrapper:

>>> getattr(Parrot, 'f')                # creates a function wrapper
<unbound method Parrot.f>
>>> getattr(Parrot, '__dict__')         # creates a dictionary wrapper
<dictproxy object at 0x00C41770>

IOW, attribute lookup can do more than just return the result of a
straight-lookup.  The underlying mechanism is a deep and interesting
subject.  If you want to know more, try this link:

   http://users.rcn.com/python/download/Descriptor.htm

Raymond



From steve at holdenweb.com  Tue Feb  7 12:24:05 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 07 Feb 2006 12:24:05 -0500
Subject: in over my head ascii
In-Reply-To: <1139326476.406060.63660@g43g2000cwa.googlegroups.com>
References: <1139245216.350356.272170@z14g2000cwz.googlegroups.com>	<sk4fu1ljvt7h7d6euj7nq06e1e0ml8p8u5@4ax.com>	<1139251420.501345.91850@g44g2000cwa.googlegroups.com>	<1139256817.218319.160370@f14g2000cwb.googlegroups.com>	<1139259694.603482.293660@g14g2000cwa.googlegroups.com>	<1139260158.822523.308780@g47g2000cwa.googlegroups.com>	<1139273414.645101.237780@z14g2000cwz.googlegroups.com>	<1139289681.648488.7060@g43g2000cwa.googlegroups.com>	<36mgu1dj9rqh3t8htppm41otgrgf70ob1t@4ax.com>	<1139319079.318524.158460@f14g2000cwb.googlegroups.com>
	<1139326476.406060.63660@g43g2000cwa.googlegroups.com>
Message-ID: <dsal3o$utd$1@sea.gmane.org>

nephish at xit.net wrote:
> ok, i am stuck again.
> 
> from the docs, the byte stream is supposed to look like this:
> 
> 'S' 'T' 'X'   [length indicator] [message type] [message] 'E' 'N' 'X'
> 
> the length indicator it says is a four byte integer number of a value N
>  ( N would be how long the message body is )
> 
> the message type comes from a table in the docs. In my case, the
> message type is 200. This is also supposed to be sent as  a 4 byte
> value.
> 
> so..... how do i make 200 occupy 4 bytes ?
> 

You use the struct module and make sure you specify the correct 
"endianness" - bet you didn't bargain for all this when you started!

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From 63q2o4i02 at sneakemail.com  Wed Feb 15 02:47:19 2006
From: 63q2o4i02 at sneakemail.com (63q2o4i02 at sneakemail.com)
Date: 14 Feb 2006 23:47:19 -0800
Subject: Self-identifying functions and macro-ish behavior
Message-ID: <1139989639.323304.239680@g43g2000cwa.googlegroups.com>

Hi, I was wondering how I may get a python function to know what its
name is without me having to write it manually?  For example:

def func1():
    <do some stuff1>
    print 'func1'
    return True

def func2():
    <do some stuff2>
    print 'func2'
    return True

should be more like
def func1():
    <do some stuff 1>
    print <self-name>
    return True

def func2():
    <do some stuff 2>
    print <self-name>
    return True

I imagine this means things like closures which I'm not familiar with
(I'm not a CS person).  In this case, each function is part of a class,
so I imagine I can take a dir() of the class if necessary.

This leads into my next related question, which is How do I get some
sort of macro behavior so I don't have to write the same thing over and
over again, but which is also not neatly rolled up into a function,
such as combining the return statements with a printing of <self-name>?
 My application has a bunch of functions that must do different things,
then print out their names, and then each call another function before
returning.  I'd like to have the last function call and the return in
one statement, because if I forget to manually type it in, things get
messed up.

(ok, I'm writing a parser and I keep track of the call level with a tab
count, which gets printed before any text messages.  So each text
message has a tab count in accordance with how far down the parser is.
Each time a grammar rule is entered or returned from, the tab count
goes up or down.  If I mess up and forget to call tabsup() or tabsdn(),
the printing gets messed up.  There are a lot of simple cheesy
production rules, [I'm doing this largely as an exercise for myself,
which is why I'm doing this parsing manually], so it's error-prone and
tedious to type tabsup() each time I enter a function, and tabsdn()
each time I return from a function, which may be from several different
flow branches.)

Thanks for any help :)

Michael



From steve at holdenweb.com  Sat Feb 25 10:08:34 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 25 Feb 2006 10:08:34 -0500
Subject: Pure python implementation of string-like class
In-Reply-To: <20060225.102645.74687871.kayama@st.rim.or.jp>
References: <20060225.102645.74687871.kayama@st.rim.or.jp>
Message-ID: <dtprtf$5dr$1@sea.gmane.org>

Akihiro KAYAMA wrote:
> Hi all.
> 
> I would like to ask how I can implement string-like class using tuple
> or list. Does anyone know about some example codes of pure python
> implementation of string-like class?
> 
> Because I am trying to use Python for a text processing which is
> composed of a large character set. As the character set is wider than
> UTF-16(U+10FFFF), I can't use Python's native unicode string class.
> 
"Wider than UTF-16" doesn't make sense.

> So I want to prepare my own string class, which provides convenience
> string methods such as split, join, find and others like usual string
> class, but it uses a sequence of integer as a internal representation
> instead of a native string.  Obviously, subclassing of str doesn't
> help.
> 
> The implementation of each string methods in the Python source
> tree(stringobject.c) is far from python code, so I have started from
> scratch, like below:
> 
>     def startswith(self, prefix, start=-1, end=-1):
>         assert start < 0, "not implemented"
>         assert end < 0, "not implemented"
>         if isinstance(prefix, (str, unicode)):
>             prefix = MyString(prefix)
>         n = len(prefix)
>         return self[0:n] == prefix
> 
> but I found it's not a trivial task for myself to achive correctness
> and completeness. It smells "reinventing the wheel" also, though I
> can't find any hints in google and/or Python cookbook.
> 
> I don't care efficiency as a starting point. Any comments are welcome.
> Thanks.
> 
The UTF-16 encoding is capable of representing the whole of Unicode. 
There should be no need to do anything special to use UTF-16.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From deets at nospam.web.de  Wed Feb  8 12:40:57 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 08 Feb 2006 18:40:57 +0100
Subject: how to...python with winmodem...
References: <1139409425.103880.149330@g44g2000cwa.googlegroups.com>
Message-ID: <44uoq4F44bs2U1@uni-berlin.de>

pdt wrote:

> Hello, i wanna know how to communicate my python program with  my
> winmodem on PC...thanks!!!

Use pyserial.

Diez


From sysfault at zetafunc.net  Wed Feb  1 18:00:48 2006
From: sysfault at zetafunc.net (Anthony Greene)
Date: Wed, 01 Feb 2006 18:00:48 -0500
Subject: OO conventions
References: <mailman.1334.1138833641.27775.python-list@python.org>
Message-ID: <pan.2006.02.01.23.00.48.66292@zetafunc.net>

On Wed, 01 Feb 2006 23:40:37 +0100, Daniel Nogradi wrote:

> I'm relatively new to object oriented programming, so get confused
> about its usage once in a while. Suppose there is a class Image that
> has a number of methods, rotate, open, verify, read, close, etc. Then
> to use this class my natural guess would be to have something like
> 
> image = Image( )
> image.read( "myfile.jpg" )
> image.rotate( )
> image.close( )
> 
> But now it turns out that the PIL module uses this as
> 
> image = Image.open( "myfile.jpg" )
> image.verify( )
> image.rotate( )
> image.close( )
> 
> Perhaps the real Image class of PIL doesn't have these methods
> exactly, but doesn't matter, my point is the way it works. Is it
> normal that instead of first creating an instance of a class, it
> starts right away with one its methods? I of course understand that
> the PIL people simply made a choice that their module works this way,
> period, but I'm just wondering if it wouldn't have been more "logical"
> to do it along the way of my first example.
> 
> I guess it's just a matter of convention or how the programmer feels
> like, but there are no conventions of this type? Which would be more
> pythonic? Or I shouldn't worry and it's totally up to the developer?


You should take a look at the PIL source files, open() could surely be a
class which takes a filename as an argument at construction time. If you
run across such code, there is really no need to worry, some things are
conventional and some are a matter of preference. In most cases diving
into the source can help clarify a lot of your speculations, better hope
the code is transparent, i hate reading non-readable code. :)

-- 
A wise man knows he knows nothing.



From rrr at ronadam.com  Sun Feb 26 21:03:34 2006
From: rrr at ronadam.com (Ron Adam)
Date: Sun, 26 Feb 2006 20:03:34 -0600
Subject: sort one list using the values from another list
In-Reply-To: <mailman.2462.1141003335.27775.python-list@python.org>
References: <mailman.2462.1141003335.27775.python-list@python.org>
Message-ID: <j8tMf.109756$4l5.3729@dukeread05>

Delaney, Timothy (Tim) wrote:
> Ron Adam wrote:
> 
>> Python 2.4.1 (#65, Mar 30 2005, 09:13:57) [MSC v.1310 32 bit (Intel)]
>> on win32
>>
>> I was a bit surprised by them being sorted.  I just happend to try
>> d.keys() in place of s2, and it sped up.  I was expecting it to be a
>> bit slower.
> 
> Purely an implementation accident - based entirely on the hash values of
> the objects you've used (i.e. small integers). As you add more data to
> the dictionary, you will definitely reach the point where you no longer
> get keys out in sorted order.
> 
> Tim Delaney

That's what I thought.


From tdwdotnet at gmail.com  Fri Feb 24 09:37:40 2006
From: tdwdotnet at gmail.com (Tim Williams (gmail))
Date: Fri, 24 Feb 2006 14:37:40 +0000
Subject: regular expresson for Unix and Dos Lineendings wanted
In-Reply-To: <B34882182.43.4423.1@mx-extra.net>
References: <jterv157550g4qd4rosc3a2o8l69gcau8v@4ax.com>
	<dohtv1h996df7h2jhdn3i283gac99rra3b@4ax.com>
	<B34882182.43.4423.1@mx-extra.net>
Message-ID: <9afea2ac0602240637y37f47d54p@mail.gmail.com>

On 24/02/06, John Zenger <john_zenger at yahoo.com> wrote:
>
> Franz Steinhaeusler wrote:
> >
> > Thank you all for the replies.
> > But I still don't have a solution.
> >
> re.sub(r"\s+[\n\r]+", lambda x: x.expand("\g<0>"). \
>      lstrip(" \t\f\v"),text).rstrip()
>
>
> But I think your code is a lot easier to read.  :)
>

How about:

>>> linesep = '\n'
>>> text = 'erewr  \t  \r\nafjdskl  \r\n  \r\npythonlist'
>>> linesep.join([ x.rstrip() for x in
text.replace('\r\n','\n').replace('\r','\n').split('\n')
])
'erewr\nafjdskl\n\npythonlist'

Which right-strips the line endings, tabs and spaces from the ends of lines
in a string derived from either Windows, Mac and Unix  or mixed files

HTH :)



--

Tim Williams
-------------- next part --------------
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From peter at engcorp.com  Fri Feb 10 08:33:54 2006
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 10 Feb 2006 08:33:54 -0500
Subject: help regarding installing python documentation
In-Reply-To: <772BCEF88A1DD91191F80011856715F3065CE5E3@zin24exm01.ap.mot.com>
References: <772BCEF88A1DD91191F80011856715F3065CE5E3@zin24exm01.ap.mot.com>
Message-ID: <dsi4o3$721$3@sea.gmane.org>

N Sharmishta-in1769c wrote:
> Hi
> I have installed the python 2.4 version and downloaded the HTML 
> documentation also.
> But when I give the command help( ) in the IDLE command prompt and ' 
> while '  ,it says
>  
> */Sorry, topic and keyword documentation is not available because the Python
> HTML documentation files could not be found.  If you have installed them,
> please set the environment variable PYTHONDOCS to indicate their location./*
> *//* 
> I don't know how to set the variable PYTHONDOCS .kindly help .

Environment variables are handled by the operating system, so until we 
know what operating system you are on, we can't provide a complete answer...



From l.exsteens at gmail.com  Thu Feb  2 09:16:59 2006
From: l.exsteens at gmail.com (Laurent)
Date: 2 Feb 2006 06:16:59 -0800
Subject: my openGL API need threads!!! But how to ,ake it work???
In-Reply-To: <1138883972.001578.149350@g44g2000cwa.googlegroups.com>
References: <1138883972.001578.149350@g44g2000cwa.googlegroups.com>
Message-ID: <1138889819.536105.57620@g47g2000cwa.googlegroups.com>

Here are my codes:
it doesn't use threading...!

# ------------------------------------------------------------
# test_pyoogl.py
# ------------------------------------------------------------

#!/usr/bin/env python

from pyoogl import *
import unittest

class test(unittest.TestCase):
  def testWindow(self):
    global Scene

    print 'Test 1:'
    print '-------'
    print 'This test simply verify if a GL window can be created.'
    print

    Scene = ooglScene()
    Scene.run()

    print 'Test 2:'
    print '-------'
    print 'Verify if a Point can ben drawed, and then if the
ooglBaseObject inheritance scheme is in order.'
    print

    Scene.append(ooglPoint())

if __name__ == '__main__':
  Scene = None
  unittest.main()

# ------------------------------------------------------------
# pyoogl.py
# ------------------------------------------------------------

#!/usr/bin/env python

from OpenGL.GL import *
from OpenGL.GLU import *
from OpenGL.GLUT import *
import math
import sys
import threading

#-------------------------------------------------------------------------------
class ooglBaseObject(object):
  def __init__(self):
    pass

#-------------------------------------------------------------------------------
class ooglObject(ooglBaseObject, list):
  """
  An ooglObject represent a object in a OpenGL scene.
  This is based on a Composite Pattern: an ooglObject is a list of
ooglObjects, and an ooglObject can ben specialised in ooglPoint,
ooglPolygon, ...
  """

  def __init__(self):
    ooglBaseObject.__init__(self)
    list.__init__(self)

  def ooglDraw(self):
    for obj in self:
      obj.ooglDraw()

#-------------------------------------------------------------------------------
class ooglPoint(ooglBaseObject):
  """
  An ooglPoint is the simpliest stuff you can creat into your scene.
  It inherits directly from ooglObject.
  """
  def __init__(self, **kwargs):
    ooglBaseObject.__init__(self)

    if 'x' in kwargs:
      self.__x = kargs['x']
    else:
      self.__x = 0

    if 'y' in kwargs:
      self.__y = kargs['y']
    else:
      self.__y = 0

    if 'z' in kwargs:
      self.__z = kargs['z']
    else:
      self.__z = 0

  def ooglSend(self):
    glVertex3f(self.__x, self.__y, self.__z)

  def ooglDraw(self):
    glBegin(GL_POINTS)
    self.ooglSend()
    glEnd()
    glFlush()

#-------------------------------------------------------------------------------
class ooglScene(list):
  """
  An ooglScene describe all that is needed to represent a OpenGL scene.
  Fundamentaly, this is a list of ooglObjects.
  """

  def __init__(self):
    list.__init__(self)

    # GLUT variables:
    self.__argv = sys.argv
    self.__DisplayMode = GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE
    self.__WindowPosition = {'x': 200, 'y': 200}
    self.__WindowSize = {'height': 250, 'width': 250}
    self.__WindowName = 'Untitled'
    self.__ClearColor = {'red': 0, 'green': 0, 'blue': 0, 'alpha': 0}

    # GL variables:
    self.__PointSize = 2
    self.__Enable = GL_DEPTH_TEST

    # Callback functions:
    self.__DisplayFunc = self.display
    self.__KeyboardFunc = self.keyboard

    # Display variables:
    self.__Clear = GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT
    self.__DefaultColor = {'red': 1, 'green': 1, 'blue': 1}

  def run(self):
    """
    Make the GL, GLUT initialisations & launch the GLUT main loop.
    """
    # GLUT initialisation + window creation:
    glutInit(self.__argv)
    glutInitDisplayMode(self.__DisplayMode)
    glutInitWindowPosition(self.__WindowPosition['x'],
self.__WindowPosition['y'])
    glutInitWindowSize(self.__WindowSize['height'],
self.__WindowSize['width'])
    glutCreateWindow(self.__WindowName)

    # GL initialisation:
    glClearColor(self.__ClearColor['red'], self.__ClearColor['green'],
self.__ClearColor['blue'], self.__ClearColor['alpha'])
    glPointSize(self.__PointSize)
    glEnable(self.__Enable)

    # setting callback functions:
    glutDisplayFunc(self.__DisplayFunc)
    glutKeyboardFunc(self.__KeyboardFunc)

    # GLUT main loop:
    glutMainLoop()
    sys.exit(0)

  def display(self):
    """
    The default for glutDisplayFunc.
    """
    glClear(self.__Clear)

    glColor3f(self.__DefaultColor['red'], self.__DefaultColor['green'],
self.__DefaultColor['blue'])
    for obj in self:
      obj.ooglDraw()

    glFlush()
    glutSwapBuffers()

  def keyboard(self, key, x, y):
    """
    The default for glutKeyboardFunc.
    """
    if key == 'q':
      sys.exit(1)



From no at spam.com  Mon Feb 13 20:27:45 2006
From: no at spam.com (DH)
Date: Mon, 13 Feb 2006 19:27:45 -0600
Subject: Pythonic gui format?
In-Reply-To: <43f11990$0$667$626a54ce@news.free.fr>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<43f11990$0$667$626a54ce@news.free.fr>
Message-ID: <a9KdnTPXHOGOr2zenZ2dnUVZ_vidnZ2d@comcast.com>

Bruno Desthuilliers wrote:
>> I am currently seeking for pythonic alternative for XML. 
> 
> A pretty obvious one is dicts and lists. What about (Q&D):


That's like JSON: http://www.json.org/example.html


From name at example.com  Thu Feb  9 23:50:58 2006
From: name at example.com (name)
Date: Fri, 10 Feb 2006 05:50:58 +0100
Subject: Fuzzy Lookups
In-Reply-To: <mailman.1684.1139519109.27775.python-list@python.org>
References: <1138635665.956131.130630@f14g2000cwb.googlegroups.com>	<1138670927.377396.78090@g44g2000cwa.googlegroups.com>	<mailman.1266.1138680617.27775.python-list@python.org>	<1138721690.283464.71570@g14g2000cwa.googlegroups.com>	<mailman.1289.1138722708.27775.python-list@python.org>	<43EBA9DB.2030506@example.com>
	<mailman.1684.1139519109.27775.python-list@python.org>
Message-ID: <43EC1BB2.4010205@example.com>

Gregory Pi?ero ha scritto:
> Wow, that looks excellent.  I'll definately try it out.  I'm assuming
> this is an existing project, e.g. you didn't write it after reading
> this thread?

Yes it is an existing projects of course ;)
Right now I've no time to improve it.
I hope that later this summer I will find
the time to make file management much easier on the
gui side and to split all the different algorithm in
external plugins so anyone can add it's own and compare
with the other already there. The main goal of my project
was primarly the interest for the "similarity search".

bye,
luca



From reply.in.the.newsgroup at my.address.is.invalid  Sun Feb 19 16:05:01 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Sun, 19 Feb 2006 22:05:01 +0100
Subject: editor for Python on Linux
References: <dtai6e$23m$2@ariane.blic.net>
	<mailman.2134.1140381888.27775.python-list@python.org>
Message-ID: <lanhv1t0sp8endde3l2ritbm7qpn3n1fdc@4ax.com>

Sriram Krishnan:
>Check out http://wiki.python.org/moin/PythonEditors.

This page can't be taken seriously. vi is not listed.

-- 
Ren? Pijlman


From infini.g at gmail.com  Thu Feb  2 08:33:42 2006
From: infini.g at gmail.com (GazaM)
Date: 2 Feb 2006 05:33:42 -0800
Subject: cgi - secure sessions
In-Reply-To: <1138871331.983318.58170@f14g2000cwb.googlegroups.com>
References: <1138842390.012855.107610@g44g2000cwa.googlegroups.com>
	<7x8xsuczxz.fsf@ruckus.brouhaha.com>
	<1138844380.094365.223840@g44g2000cwa.googlegroups.com>
	<1138871331.983318.58170@f14g2000cwb.googlegroups.com>
Message-ID: <1138887222.504350.209200@z14g2000cwz.googlegroups.com>

Ok, thanks for all the help guys. It seems that running this type of
script from inside of the html just isn't going to work as needed.
Seems like I'll just have to ditch the .shtml and point directly to a
cgi. This is how the other Python frameworks and sites work, such as
reddit and plone etc right?



From cvanarsdall at mvista.com  Thu Feb 16 11:41:40 2006
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Thu, 16 Feb 2006 08:41:40 -0800
Subject: is socket thread safe?
In-Reply-To: <20060216000543.6122.373845425.divmod.quotient.20@ohm>
References: <20060216000543.6122.373845425.divmod.quotient.20@ohm>
Message-ID: <43F4AB44.60407@mvista.com>

Jean-Paul Calderone wrote:
> On Wed, 15 Feb 2006 12:59:03 -0800, "Carl J. Van Arsdall" <cvanarsdall at mvista.com> wrote:
>   
>> Steve Horsley wrote:
>>     
>>> e2wugui at gmail.com wrote:
>>>
>>>       
>>>> thread1:
>>>>     while 1:
>>>>         buf = s.read()
>>>>         process(buf)
>>>>
>>>> thread2:
>>>>     while 1:
>>>>         buf = getdata()
>>>>         s.write(buf)
>>>>
>>>>
>>>>         
>>> It is safe, but watch out for this gotcha: If thread B calls
>>> s.close() while thread A is blocked in s.read(), thread A will
>>> never return from the read. My preferred solution is to set
>>> socket timeout to a few seconds, and loop checking a status flag
>>> so I know when to quit.
>>>
>>>
>>>       
>> I think a better thing would be to use something like a condition object
>> to tie the two threads together and not use any polling loops.
>>
>> i.e.  consumer goes to sleep while data buffer is empty, producer
>> produces and signals condition object, consumer wakes up and consumes.
>>     
>
> What makes you think process isn't implemented to notify a condition, and getdata isn't implemented to wait on one? :)
>
>   
I think it was the "loop checking status flag" comment that threw me off 
*shrug*   8)

-carl

-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From aleaxit at yahoo.com  Sun Feb 26 19:12:31 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 26 Feb 2006 16:12:31 -0800
Subject: SyntaxError: can't assign to a function call
References: <1140997057.610226.101220@u72g2000cwu.googlegroups.com>
	<1hbdijm.3cc1cz15xqd64N%aleaxit@yahoo.com>
	<1140998338.081756.313040@j33g2000cwa.googlegroups.com>
Message-ID: <1hbdjbe.17nwdrj2eipb0N%aleaxit@yahoo.com>

Fuzzyman <fuzzyman at gmail.com> wrote:
   ...
> > Exactly what the error message says: it's syntactically forbidden to
> > perform any assignment on a function-call.
   ...
> Cool, thanks. That's what I did, it's just not an error I'd seen
> before. Everywhere else Python evaluates the function call and then
> does it's stuff with the result.

Not sure what you mean by 'everywhere else'; generally and syntactically
speaking, you can use a function-call, more or less, in all the places,
and only the places, in which you could use a constant (literal) list
such as [2] -- you can't assign to it, you can't use it as the x in 'for
x in ...', in a clause "except x, y:" you can (syntactically) use it as
x but not as y, etc.  Basically, wherever Python needs a rebindable name
or other rebindable reference, you cannot substitute a function call,
nor a constant (literal) list (nor any of several other possible
literals and other expressionforms).

Wherever Python just needs a value, not a rebindable whatever, then of
course you can supply that value in whatever syntax form suits you best,
including a function-call, a literal, and many other ways besides.


Alex


From pablodt05 at gmail.com  Wed Feb  8 09:37:05 2006
From: pablodt05 at gmail.com (pdt)
Date: 8 Feb 2006 06:37:05 -0800
Subject: how to...python with winmodem...
Message-ID: <1139409425.103880.149330@g44g2000cwa.googlegroups.com>

Hello, i wanna know how to communicate my python program with  my
winmodem on PC...thanks!!!



From steve at holdenweb.com  Wed Feb  8 16:08:25 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 08 Feb 2006 16:08:25 -0500
Subject: What editor shall I use?
In-Reply-To: <1139413836.955061.243330@g47g2000cwa.googlegroups.com>
References: <1139410110.389122.215400@z14g2000cwz.googlegroups.com>
	<1139413836.955061.243330@g47g2000cwa.googlegroups.com>
Message-ID: <dsdmkb$1as$1@sea.gmane.org>

Petr Jakes wrote:
> http://www.pspad.com/en/
> 
> Petr Jakes
> 
Windows provides the perfectly usable Notepad which, while not perfect 
for Python, is quite good enough to get started.

The Save dialog box allows the user to select an encoding, including UTF-8.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From pprobert at wisc.edu  Fri Feb 24 09:37:08 2006
From: pprobert at wisc.edu (Paul Probert)
Date: Fri, 24 Feb 2006 08:37:08 -0600
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <11vt1tcq488uj3d@corp.supernews.com>
References: <mailman.2369.1140730029.27775.python-list@python.org>	<dtla7j$pqs$1@newsreader3.netcologne.de>	<mailman.2373.1140731808.27775.python-list@python.org>
	<11vt1tcq488uj3d@corp.supernews.com>
Message-ID: <dtn5gc$2l9$1@sea.gmane.org>

Grant Edwards wrote:

>Time to dowload a linux CD then, eh?
>
>  
>
We are looking at that very seriously. The big hurdle is that we run a 
lot of laboratory hardware that has no support under linux. A world 
where there is no more Kazaa or sasser seems like it would be wonderful, 
though.

Paul Probert
University of Wisconsin



From haraldarminmassa at gmail.com  Wed Feb 22 12:20:24 2006
From: haraldarminmassa at gmail.com (Harald Armin  Massa)
Date: 22 Feb 2006 09:20:24 -0800
Subject: cx_Oracle and UTF8
Message-ID: <1140628824.353213.278300@o13g2000cwo.googlegroups.com>

Hello,

I am looking for a method to convince cx_Oracle and oracle to encode
it's replies in UTF8.

For the moment I have to...

cn=cx_Oracle.connect("user","password", "database")
cs=cn.Cursor()

cs.execute("select column1, column2, column3 from table")

for row in cs.fetchall():
   t=[]
   for i in range(0,len(row)):
      if hasattr(row[i],"encode"):
        t.append(row[i].encode("utf8"))
      else:
        t.append(row[i])
    print t

Guess I am to much accustomed to postgresql which just allows "set
client_encoding='utf8'...

Harald



From claudio.grondi at freenet.de  Mon Feb 13 11:10:55 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Mon, 13 Feb 2006 17:10:55 +0100
Subject: Image to numeric array
In-Reply-To: <45bmv4F5rjf2U1@uni-berlin.de>
References: <mailman.1831.1139841904.27775.python-list@python.org>
	<45bmv4F5rjf2U1@uni-berlin.de>
Message-ID: <dsqb2i$19p$1@newsreader3.netcologne.de>

Diez B. Roggisch wrote:
> Dimitrios Charitatos wrote:
> 
> 
>>Hello,
>>
>>I suspect that there is a quite straight forward answer to this, but I
>>can't find it... I want to import an image and extract a matrix (or array)
>>from it with elements showing the RGB value of each pixel. But I want to
>>be able to do this with all types of image formats. It was suggested that
>>a function such as 'B = numeric.from_image(A)' was used but I can't find
>>it in any of the libraries. I was hoping you could help me on this.
> 
> 
> You have to install the numeric library for that. Googling numeric python
> will bring you there pretty quick.
> 
> Diez
Is there a difference between the 'Numeric' and 'numeric' module?
I have on my system only Numeric... And this has no function like 
'from_image'.

The usual way of doing such things is to use PIL (Python Image Library) 
to load the image from file, then export it from PIL to a Python string 
in order to import from this string to an array of the targeted 
numerical module.

Really curious if there is a direct way in any of the numerical 
packages, as it would save the time and effort of unnecessary 
conversions from PIL, ImageMagick or from other image libraries.

Claudio




From davidworley at gmail.com  Sun Feb  5 14:29:22 2006
From: davidworley at gmail.com (Dave)
Date: 5 Feb 2006 11:29:22 -0800
Subject: translating PHP to Python
In-Reply-To: <6ErFf.3267$MJ.1302@fed1read07>
References: <1139164228.608430.13120@g44g2000cwa.googlegroups.com>
	<6ErFf.3267$MJ.1302@fed1read07>
Message-ID: <1139167762.095956.180350@g14g2000cwa.googlegroups.com>

Farshid,

This is a great help, thanks.

The second point won't work, though, because by parent class I mean,
simply, the object that created the current object, *not* the class the
current class is based on.

So, for example:

class A(object):
    def __init__(self):
        self.thing = Thing()
        self.thing.meth()

    def do_stuff(self):
        print "Stuff"

class Thing(object):
    def meth(self):
        #now here's what I WANT
        self.parent.do_stuff(args)

Is there a built in way to do this in Python, or do I have to pass
"parent" when I init Thing?

Sorry if this is confusing. It confuses me, too. I should have been a
carpenter.

- Dave



From michele.simionato at gmail.com  Tue Feb  7 11:40:48 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 7 Feb 2006 08:40:48 -0800
Subject: The problem of anonymity with decorators
In-Reply-To: <43e8c0bb$0$22678$79c14f64@nan-newsreader-07.noos.net>
References: <43e8c0bb$0$22678$79c14f64@nan-newsreader-07.noos.net>
Message-ID: <1139330448.039347.221150@g14g2000cwa.googlegroups.com>

Using my decorator module
(http://www.phyast.pitt.edu/~micheles/python/documentation.html,
http://www.phyast.pitt.edu/~micheles/python/decorator.zip) you solve
the problem of the
name, but the traceback is still not perfect. You get:

# dec_traceback.py
from ms.decorator import decorator

@decorator
def int_result (fun, *largs, **kwargs) :
    result = fun(*largs, **kwargs)
    if not isinstance(result, int) :
        raise TypeError, "should return int"
    return result

@int_result
def add (a, b) :
    return a+b

print add(1, 2)
print add("foo", "bar")

# end dec_traceback.py

$ python dec_traceback.py
3
Traceback (most recent call last):
  File "dec_traceback.py", line 15, in ?
    print add("foo", "bar")
  File "<string>", line 2, in add
  File "dec_traceback.py", line 7, in int_result
    raise TypeError, "should return int"
TypeError: should return int

The reason of <string> is that the module internally uses 'exec'. There
should be a way around
that, anyway, but I have no time to check it right now.
Still, the module may be of inspiration to you.

        Michele Simionato



From fredrik at pythonware.com  Sun Feb  5 11:38:08 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 5 Feb 2006 17:38:08 +0100
Subject: Learning Python
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com><ds588v$6s4$02$1@news.t-online.com>
	<1139156577.897100.69140@g43g2000cwa.googlegroups.com>
Message-ID: <ds59li$45t$1@sea.gmane.org>

Byte wrote:

> p.s. Xavier Morel, you seem to be using Windows, not Linux, and I got
> the idea of stacking input on a raw_input from the official Python
> Tutorial.

link, please.

</F>





From dylan.moreland at gmail.com  Wed Feb  8 12:54:53 2006
From: dylan.moreland at gmail.com (Dylan Moreland)
Date: 8 Feb 2006 09:54:53 -0800
Subject: A __getattr__ for class methods?
Message-ID: <1139421293.213901.5380@f14g2000cwb.googlegroups.com>

I'm trying to implement a bunch of class methods in an ORM object in
order to provide functionality similar to Rails' ActiveRecord. This
means that if I have an SQL table mapped to the class "Person" with
columns name, city, and email, I can have class methods such as:

    Person.find_by_name
    Person.find_by_city_and_name
    Person.find_by_name_and_city_and_email

I have a metaclass generating basic properties such as .name and .city,
but I don't want to generate a class method for every permutation of
the attributes. I'd like to have something much like __getattr__ for
instance attributes, so that if a method like
Person.find_by_city_and_email cannot be found, I can construct a call
to the basic find method that hides the SQL. Is there any way of doing
this, or am I trying to mirror a functionality that Python simply does
not have?



From kent at kentsjohnson.com  Thu Feb 23 08:01:48 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Thu, 23 Feb 2006 08:01:48 -0500
Subject: reviews of unit test frameworks
In-Reply-To: <mailman.2332.1140669095.27775.python-list@python.org>
References: <mailman.2332.1140669095.27775.python-list@python.org>
Message-ID: <43fdadb2$1_2@newspeer2.tds.net>

kanchy kang wrote:
> Is there any reviews/remarks on these frameworks?
> nose, OOBTest,testosterone, py.test, Sancho.

http://agiletesting.blogspot.com/2005/02/articles-and-tutorials.html


From michele.petrazzo at TOGLIunipex.it  Fri Feb 24 12:18:01 2006
From: michele.petrazzo at TOGLIunipex.it (Michele Petrazzo)
Date: Fri, 24 Feb 2006 18:18:01 +0100
Subject: Exception not raised
Message-ID: <43ff3fc8$0$29105$5fc30a8@news.tiscali.it>

Hi list, I have a strange error on my software on win 2k/xp and debian
3.1 with py 2.3.5 / 2.4.1 + twisted + wxpython:

python, on a piece of code doesn't raise a KeyError on a dict (that
don't have that key), but the strange thing is that the try/except code
see that exception. Other strange thing is that other exceptions are raised!

Simple example extract from my code:

#code
def test():
  print type(t_fields), 11 in t_fields
  print t_fields[11]
  print "I'm here"

print "ok"
test()
print "ok"
#end code

Output:

ok
<type 'dict'> False

Here I see only one "ok" and not the "I'm here". The interpreter stop to
run here, but the application continue to work!

Other try:

#code
def test():
  try:
   print type(t_fields), 11 in t_fields
   print t_fields[11]
  except KeyError, ex:
   print "Error",  ex
#end code

Output:

ok
<type 'dict'> False
Error 11
ok

Here the output is ok, so python see that exception inside the
try/except and print it.

Last try:

#code
def test()
  print type(t_fields), 11 in t_fields
  print dont_exist
  print t_fields[11]
#end code

Output:

ok
<type 'dict'> False
File "conn.py", line 231, in test
     print dont_exist
NameError: global name 'dont_exist' is not defined


So all the exception are raised except the KeyError outside the try/except!

I don't know what can be.

Thanks to all that can help me.
Michele


From exarkun at divmod.com  Thu Feb  2 12:20:02 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 2 Feb 2006 12:20:02 -0500
Subject: Starting terminal applications from within python
In-Reply-To: <1138899294.111613.151980@g49g2000cwa.googlegroups.com>
Message-ID: <20060202172002.2697.1103710944.divmod.quotient.4714@ohm>

On 2 Feb 2006 09:01:11 -0800, sleepylight <sleepylight at gmail.com> wrote:
>Hi
>
>I'm staring to learn python for some systems administration projects
>and so far this looks like a really great alternative to using shell
>for everything.  The python docs on the web site are really great, but
>I could use come clarification on passing arguments using the
>os.spawnlp() function.
>
>For example, if I run  "xterm -e /opt/itt/ncbr/bin/linux/bar" I get an
>xterm executing my nice little test program.  However, if I try to run
>that same commad in python it doesn't work so well.
>
>>>> os.spawnlp(os.P_NOWAIT, "/usr/bin/xterm", "/usr/bin/xterm", "-e /opt/itt/ncbr/bin/linux/bar")

Try this:

    os.spawnlp(
        os.P_NOWAIT,
        "/usr/bin/xterm",
        "/usr/bin/xterm",
        "-e",
        "/opt/itt/ncbr/bin/linux/bar")

Each argumnent after the 2nd to spawnlp() is an argument to the program you are running.  passing "-e /path" as a single argument is the same as trying to do this on the command line:

    xterm "-e /path"

which I think you will find fails in the same way.

Jean-Paul


From eoinrogers at gmail.com  Sun Feb  5 12:17:23 2006
From: eoinrogers at gmail.com (Byte)
Date: 5 Feb 2006 09:17:23 -0800
Subject: Learning Python
In-Reply-To: <ds5c0n$cej$2@aphrodite.grec.isp.9tel.net>
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
	<1139156577.897100.69140@g43g2000cwa.googlegroups.com>
	<mailman.1439.1139157505.27775.python-list@python.org>
	<1139158796.288778.244000@z14g2000cwz.googlegroups.com>
	<ds5c0n$cej$2@aphrodite.grec.isp.9tel.net>
Message-ID: <1139159843.488988.279770@g43g2000cwa.googlegroups.com>

Yes, sorry, didnt realise diffrence between int and input. Since i'm
such an idiot at this, any links to sites for people who need an
unessicerily gentle learning curve?



From steve at holdenweb.com  Thu Feb 16 23:41:59 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 16 Feb 2006 23:41:59 -0500
Subject: web crawler in python or C?
In-Reply-To: <1140069412.051298.242150@g44g2000cwa.googlegroups.com>
References: <1140069412.051298.242150@g44g2000cwa.googlegroups.com>
Message-ID: <dt3k6h$j4k$2@sea.gmane.org>

abhinav wrote:
> Hi guys.I have to implement a topical crawler as a part of my
> project.What language should i implement
> C or Python?Python though has fast development cycle but my concern is
> speed also.I want to strke a balance between development speed and
> crawler speed.Since Python is an interpreted language it is rather
> slow.The crawler which will be working on huge set of pages should be
> as fast as possible.One possible implementation would be implementing
> partly in C and partly in Python so that i can have best of both
> worlds.But i don't know to approach about it.Can anyone guide me on
> what part should i implement in C and what should be in Python?
> 
Get real. Any web crawler is bound to spend huge amounts of its time 
waiting for data to come in over network pipes. Or do you have plans for 
massive parallelism previously unheard of in the Python world?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From i5ex1rbkxp19gxl at jetable.net  Sun Feb 26 14:39:14 2006
From: i5ex1rbkxp19gxl at jetable.net (peleme)
Date: 26 Feb 2006 11:39:14 -0800
Subject: Coding Problem (arbitrary thread sych)
References: <1140975744.540285.45170@j33g2000cwa.googlegroups.com>
	<4401ec29$1_1@newspeer2.tds.net>
Message-ID: <1140982753.975534.170530@t39g2000cwt.googlegroups.com>

Hi Kent,

that's exactly the solution for my problem. Thanks a lot!

Martin



From tim.peters at gmail.com  Tue Feb 14 10:40:09 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Tue, 14 Feb 2006 10:40:09 -0500
Subject: how do you pronounce 'tuple'?
In-Reply-To: <1139816300.706181.79250@f14g2000cwb.googlegroups.com>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<11v032ii4gvik72@corp.supernews.com>
	<1139816300.706181.79250@f14g2000cwb.googlegroups.com>
Message-ID: <1f7befae0602140740s5c1abdfdh85618233dbaa68b6@mail.gmail.com>

[nnorwitz at gmail.com]
> ...
> I work with Guido now and I'm conflicted.  I'm still conditioned to say
> tuhple.  Whenever he says toople, I just get a smile on my face.  I
> think most of the PythonLabs guys pronounce it toople.

"tuhple" is a girly-man affectation.  That's why Guido and I both say
the manly "toople".  Jeremy's still a baby, so he says "tuhple", and
for the same reasons other adolescent males pierce their nipples. 
Barry sucks up to whoever he's talking with at the moment.  Fred is a
doc guy, so nobody remembers what he says ;-)

the-acid-test-is-whether-you-say-"xor"-with-one-syllable-or-three-ly y'rs  - tim


From roy at panix.com  Tue Feb 28 21:34:22 2006
From: roy at panix.com (Roy Smith)
Date: Tue, 28 Feb 2006 21:34:22 -0500
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<mailman.2474.1141050152.27775.python-list@python.org>
	<877j7gxonk.fsf@rose.polar.local>
	<roy-71481E.21125127022006@reader2.panix.com>
	<87zmkb2cf2.fsf@rose.polar.local>
Message-ID: <roy-B78E9A.21342228022006@reader2.panix.com>

Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:

> > a = enum ('foo', 'bar', 'baz')
> > b = enum ('foo', 'bar', 'baz')
> 
> Two separate enumerations are created

OK, most of the rest follows from that.

> > str (a)
> 
> Not defined in the current specification. Suggestions?

Well, by analogy with

>>> a = set ((1, 2, 3))
>>> print '%s' % a
set([1, 2, 3])

I would think:

enum('foo', 'bar', 'baz')

would make sense.

> > repr (a)
> 
> Not defined in the current specification. Suggestions?

Hmm.  Maybe what I suggested for str() would work for repr() too.  I'm a 
little worried, however, about things that aren't == but print the same.  
It might make more sense for repr() to include the id (in the style of 
'<__main__.x instance at 0x8208f6c>').  Same with the repr() of an enum 
member.

> > hash (a)
> 
> -1210774164  # or some other hash value

I saw some debate about mutable or immutable.  Doesn't making something 
hashable kinda-sorta mean it has to be immutable?

> > You imply that it works from "An enumerated type is created from a
> > sequence of arguments to the type's constructor", but I suspect
> > that's not what you intended.
> 
> That's what I intended; a sequence of arguments. Is there a better way
> to refer to the positional arguments collectively?

I'm not really a language lawyer, so I can't say.  I was mostly trying to 
explore the corners of the envelope.

> > There's been a number of threads recently where people called 
> > regex methods with flags (i.e. re.I) when integers were expected, with 
> > bizarre results.  Making the flags into an enum would solve the problem 
> > while retaining backwards compatibility.
> 
> Yes, this is a prime use case for enums. I tried to cover this in the
> "Motivation"::
> 
>     Other examples include error status values and states
>     within a defined process.
> 
> Can anyone think of a better way to express this, without necessarily
> referring to any specific set of flags or states or codes or whatever?

Cite the regex thread :-)


From mahs at telcopartners.com  Fri Feb 10 17:19:05 2006
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 10 Feb 2006 14:19:05 -0800
Subject: two generators working in tandem
In-Reply-To: <20060210214512.6383.qmail@web36710.mail.mud.yahoo.com>
References: <20060210214512.6383.qmail@web36710.mail.mud.yahoo.com>
Message-ID: <dsj3gl$jbq$1@sea.gmane.org>

john peter wrote:
> I'd like to write two generators: one is a min to max sequence number generator that
>   rolls over to min again once the max is reached. the other is a generator that cycles
>   through N (say, 12) labels. currently, i'm using these generators in nested loops like
>   this:
>    
>   seq_numbers = genSeqNum(min,max)
>   for label in genLabel():
>      for some_date in genDate(init):
>         for i in xrange(0, LIMIT):
>            print label, some_date, i, seq_numbers.next()
>    
>   The problem I'm trying to solve is this:
>   when the seq_numbers generator rolls over, the label generator must be advanced
>   to the next one "in tandem". does anyone has any suggestion? thanks for any hepl!
> 
> 		
> ---------------------------------
>  Yahoo! Mail
>  Use Photomail to share photos without annoying attachments.
> 
This returns an iterator that 'nests' an arbitrary number of sequences 
(odometer-style).

def nest(*sequences):
     def _nest(outer, inner):
         for outer_item in outer:
             if not isinstance(outer_item, tuple):
                 outer_item = (outer_item,)
             for inner_item in inner:
                 yield outer_item + (inner_item,)
     return reduce(_nest, sequences)


So, for your use case:

  >>> seq_numbers = range(1,10)
  >>> labels = ["A","B","C"]
  >>> list(nest(labels, seq_numbers))
  [('A', 1), ('A', 2), ('A', 3), ('A', 4), ('A', 5), ('A', 6), ('A', 7), ('A', 
8), ('A', 9), ('B', 1), ('B', 2), ('B', 3), ('B', 4), ('B', 5), ('B', 6), ('B', 
7), ('B', 8), ('B', 9), ('C', 1), ('C', 2), ('C', 3), ('C', 4), ('C', 5), ('C', 
6), ('C', 7), ('C', 8), ('C', 9)]
  >>>


HTH, Michael




From jstroud at ucla.edu  Mon Feb 13 22:17:00 2006
From: jstroud at ucla.edu (James Stroud)
Date: Mon, 13 Feb 2006 19:17:00 -0800
Subject: listing attributes
In-Reply-To: <1139884643.749492.221140@g43g2000cwa.googlegroups.com>
References: <1139884643.749492.221140@g43g2000cwa.googlegroups.com>
Message-ID: <dsri3c$rmk$1@daisy.noc.ucla.edu>

Thomas Girod wrote:
> Hi there.
> 
> I'm trying to get a list of attributes from a class. The dir() function
> seems to be convenient, but unfortunately it lists to much - i don't
> need the methods, neither the built-in variables.
> 
> In fact, all my variables are referencing to objects of the same type.
> Can anyone suggest me a way to get this list of variables ?
> 
> Thanks
> 
> Thomas
> 


Here's a "smart-ass" example:

py> import random
py> class C:
...   def __repr__(self):
...     return "<Im_a_C!>"
...
py> alist = [1,2,3,4,5] + [C() for x in xrange(5)]
py> alist
[1, 2, 3, 4, 5, <Im_a_C!>, <Im_a_C!>, <Im_a_C!>, <Im_a_C!>, <Im_a_C!>]
py> class Obj:
...   def __repr__(self):
...     return str([getattr(self, o) for o in dir(self) \
...       if isinstance(getattr(self, o), C)])
...
py> anobj = Obj()
py> newlist = [choice(alist) for x in xrange(10)]
py> newlist
[<Im_a_C!>, <Im_a_C!>, 5, 1, 5, 4, 4, <Im_a_C!>, <Im_a_C!>, 3]
py> [setattr(anobj, *tup) for tup in zip('abcdefghij', newlist)]
[None, None, None, None, None, None, None, None, None, None]
py> anobj.a
<Im_a_C!>
py> anobj.b
<Im_a_C!>
py> anobj.c
5
py> anobj.d
1
py> print anobj
[<Im_a_C!>, <Im_a_C!>, <Im_a_C!>, <Im_a_C!>]

James


From ruby at no.spam  Sun Feb 26 20:49:06 2006
From: ruby at no.spam (Michal Kwiatkowski)
Date: Mon, 27 Feb 2006 02:49:06 +0100
Subject: Local variables initialization
In-Reply-To: <1hbdmaq.9h7q9m1urzg1oN%aleaxit@yahoo.com>
References: <dttf62$qng$1@news.onet.pl>
	<1hbdjrw.1lrbcv8k3kcbsN%aleaxit@yahoo.com>
	<dttjb7$ba8$1@news.onet.pl>
	<1hbdmaq.9h7q9m1urzg1oN%aleaxit@yahoo.com>
Message-ID: <dttlnh$ji9$1@news.onet.pl>

Alex Martelli wrote:
> But of course, then the method's body would have to use _.one rather
> than var_one, _.two rather than var_two, and _.empty_list rather than
> empty_list (what a strange name -- does it STAY empty throughout the
> method's execution?!).  To me this looks like a small price to pay, and

empty_list name was chosen only for sake of an example.

> the 'def method(_, self, ...)' signature a clear, strong indication that
> something weird, but not TOO weird, is going on. YMMV...

Thanks for your reply, I'll consider your suggestion.

mk
-- 
 . o .       >>  http://joker.linuxstuff.pl  <<
 . . o   It's easier to get forgiveness for being wrong
 o o o   than forgiveness for being right.


From peter at engcorp.com  Tue Feb 28 19:02:55 2006
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 28 Feb 2006 19:02:55 -0500
Subject: Use empty string for self
In-Reply-To: <1141170846.619246.163470@t39g2000cwt.googlegroups.com>
References: <1141170846.619246.163470@t39g2000cwt.googlegroups.com>
Message-ID: <du2oba$v27$1@sea.gmane.org>

paullanier at gmail.com wrote:
> It seems that lots of people don't like having to prefix self. in front
...
> But what if we keep the '.' and leave out the self.  
...
> Any comments?  Has this been discussed before?

Yes, at least once (found by group-googling for "removing self" in this 
newsgroup):

http://groups.google.com/group/comp.lang.python/browse_frm/thread/ebcd82c4f3c2d483/ad791fdd4734579c?tvc=1&q=%22removing+self%22#ad791fdd4734579c


-Peter



From dcoffin at gmail.com  Tue Feb 21 12:34:27 2006
From: dcoffin at gmail.com (David Coffin)
Date: Tue, 21 Feb 2006 17:34:27 +0000
Subject: changing value of 'self' when subclassing int
In-Reply-To: <slrndvlvmd.6k1.nick@irishsea.home.craig-wood.com>
References: <mailman.2170.1140453870.27775.python-list@python.org>
	<slrndvlvmd.6k1.nick@irishsea.home.craig-wood.com>
Message-ID: <49DC7955-5DA7-4B83-8F4F-BEA821E967A9@gmail.com>

Thanks for all the help.

> On 20 Feb 2006, at 17:34, Alex Martelli wrote:
>
> ...integers are immutable, like all other numbers in Python: there  
> is NO
> way to "change the value of the integer itself".

So, on learning that I could subclass the number types, I didn't even  
consider the fact that they're immutable. I feel slightly foolish.  
And I'll look at gmpy straight away, it looks like it contains  
functionality I'll find useful.

> On 21 Feb 2006, at 10:58, Fuzzyman wrote:
>
> Probably your best bet is to have the assignment done as a method call
> which returns the new value.

I not sure that would be suitable in this case. I'm using genetic  
algorithm code containing some methods that assume 'individuals' are  
represented as bitstrings, and some that assume individuals are  
represented as lists of integers. Ideally, I could have created a  
class for the bitstring individuals that also supported list based  
bit assignment (without too much overhead).

Best wishes,
David Coffin


From roy at panix.com  Sun Feb 12 12:57:35 2006
From: roy at panix.com (Roy Smith)
Date: Sun, 12 Feb 2006 12:57:35 -0500
Subject: Is Forth for real?
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
	<1139754010.067582.214830@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>
	<1v44c3-geo.ln1@lairds.us>
	<pan.2006.02.12.17.38.02.455701@REMOVETHIScyber.com.au>
Message-ID: <roy-048E45.12573512022006@reader2.panix.com>

Steven D'Aprano <steve at REMOVETHIScyber.com.au> wrote:

> I love Forth. I'm no good at thinking at that low count-the-bytes level,
> but if I was, I'd much prefer to use Forth than C or assembly. I've got a
> bunch of Forth books here, and when I'm bored I read them for
> entertainment, and dream. I love the fact that Forth is still in use. But
> I'm under no illusions that there are millions of Forth developers getting
> paid to write in Forth.

If you like Forth, take a look at PostScript.  Most people think of 
PostScript as a print file format and don't realize it's a real programming 
language. Variables, functions, loops, if statements, and all that good 
stuff.  The syntax is very Forth-like.


From martijn at gamecreators.nl  Wed Feb  8 03:39:53 2006
From: martijn at gamecreators.nl (martijn at gamecreators.nl)
Date: 8 Feb 2006 00:39:53 -0800
Subject: only a simple xml reader <tag:id>value</tag:id>
Message-ID: <1139387993.478950.76410@g44g2000cwa.googlegroups.com>

H!,

Is it possible to get a <tag:id>value</tag:id> value ?

When I do this:
-----------------------------------------------------
theXML = """<?xml version="1.0"?>
    <title>The Fascist Menace</title>
"""
import xml.dom.minidom as dom
doc = dom.parseString(theXML)
print doc.getElementsByTagName('title')[0].toxml()

I get : <title>The Fascist Menace</title> thats oke for me
-----------------------------------------------------

But the xmlfile I must read have other tags:
theXML = """<?xml version="1.0"?>
    <title:id>The Fascist Menace</title:id>
    <title:name>bla la etc</title:name>
"""

how to get that values ?
I try things like:
print doc.getElementsByTagName('title:id')[0].toxml() <--error

Thanks,
GC-Martijn



From rupole at hotmail.com  Tue Feb 14 18:49:36 2006
From: rupole at hotmail.com (Roger Upole)
Date: Tue, 14 Feb 2006 18:49:36 -0500
Subject: Python and ASP
References: <1139958137.733403.33640@g44g2000cwa.googlegroups.com>
Message-ID: <1139961021_9771@sp6iad.superfeed.net>

It looks like you have a space before the first Response.Write.
This works fine for me if that line is left-justified.

      hth
        Roger


"Tempo" <bradfordh at gmail.com> wrote in message news:1139958137.733403.33640 at g44g2000cwa.googlegroups.com...
>I recently uploaded a sample ASP-Python page to my web server and it
> didn't show up correctly. Before I explain what it did, I should
> mention that I got the same result when I tried to view the page from
> my desktop (winxp user). So when I tried to view the sample ASP with
> Python page from my desktop and web server, all that showed up was the
> source code. I'm not sure exactly what this means since I know that
> python 2.4 is installed on my computer and the ASP page still didn't
> show up correctly. Here's the sample ASP-Python code, courtesy of
> http://www.4guysfromrolla.com/webtech/082201-1.shtml :
>
>
> <html>
> <head>
> <title>ASP-Python Test Page</title>
> </head>
> <body>
> <%@ Language=Python %>
> <%
>  Response.Write("Python lives in the ASP delimeters!")
> %>
> <br />
>
> <script language="Python">
> document.write("Python's throwing a party on the client-side!")
> </script>
> <br />
>
> <script language="Python" runat="server">
> Response.Write("Python gets ready to rumble inside a server-side
> scripting block!")
> </script>
> </body>
> </html>
>
>
>
>
> Any ideas about what I am doing wrong? Thanks.
> 




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From jm.suresh at gmail.com  Tue Feb 21 02:25:29 2006
From: jm.suresh at gmail.com (Suresh Jeevanandam)
Date: Tue, 21 Feb 2006 12:55:29 +0530
Subject: Multiple assignment and the expression on the right side
In-Reply-To: <1hb2v8p.stwgof10kmfz2N%aleaxit@yahoo.com>
References: <dte84b$568$1@home.itg.ti.com>
	<1hb2v8p.stwgof10kmfz2N%aleaxit@yahoo.com>
Message-ID: <dtef9b$a42$1@home.itg.ti.com>

Alex Martelli wrote:
> Suresh Jeevanandam <jm.suresh at gmail.com> wrote:
> 
>> Dear all,
>>       I read in "Python in a Nutshell" that when we have multiple assignments
>> made on a single line, it is equivalent to have those many simple 
>> assignments and that the right side is evaluated once for each 
>> assignment. [The wordings are mine. I am not sure if this is what he 
>> intended].
> 
> Since the original text is:
> 
> """
> Each time the statement executes, the right-hand side expression is
> evaluated once. Each target gets bound to the single object returned by
> the expression.
> """

Alex,
	I should have read carefully.

I think I got confused because of "Each time" in the sentence which 
gives a feeling that it gets executed several times. Maybe, It could 
have been just written, "When the statement gets executed, the right 
hand side is evaluated once, and the result is assigned to each of the 
target".

	Thanks a lot.

regards,
Suresh

> it might be interesting to understand how you managed to translate ONCE
> into ONCE PER ASSIGNMENT TARGET.  I can most earnestly assure you that
> when I wrote ONCE I meant ONCE. If ONCE meant TWICE (or more), how could
> there be a guaranteed SINGLE OBJECT to which each target gets bound?
> 
>>       So, In the following code snippet I expected the values of c, d, e to
>> be different. But they are not? I am missing something... What is it?
> 
> A good command of English, maybe?  With that ONCE and SINGLE in there,
> no matter how much I try to, I just cannot see ambiguity in the words I
> had written.  Nevertheless, in your honor, I guess I will redundantly
> change the ONCE into JUST ONCE in the second edition (I do strive for
> maximum conciseness in the Nutshell, but I guess I can spare one extra
> four-letter word, even though this is the only time I ever heard anybody
> express any doubt or misunderstanding about this paragraph).
> 
> 
> Alex


From rlratzel at enthought.com  Wed Feb  8 18:26:28 2006
From: rlratzel at enthought.com (Rick Ratzel)
Date: 8 Feb 2006 15:26:28 -0800
Subject: jump into the interpreter in a script
References: <mailman.1633.1139440322.27775.python-list@python.org>
Message-ID: <1139441188.791728.59670@z14g2000cwz.googlegroups.com>

pdb might help.  Add this to your code:

import pdb
pdb.set_trace()



From jaco at neottia.net  Wed Feb 22 09:15:28 2006
From: jaco at neottia.net (Eric Jacoboni)
Date: Wed, 22 Feb 2006 15:15:28 +0100
Subject: Question about struct.unpack
Message-ID: <m2bqwzxywv.fsf@titine.jacoboni.fr>

Hi,

To experiment with unpacking, i've written a little C code which
stores one record in a file. Then, i try to reread this file to unpack
the record.

Here's the struct of a record:

typedef struct {
      char nom[30];
      double taille;
      int age;
      char plop;
  } enreg_t;

The whole size, as given by sizeof() is 48, due to byte alignment.

I was first thinking that "32sdic" would make the job, but calcsize()
reports only 45 for this format. So, without knowing what, i've tried
"32sdicxxx" to reach the 48 expected... Now it works...

The same file, re-read with a Ruby script needs a
str.unpack("Z32dIc").

So, i don't know why i need to pad the format string in Python. Any
clue?

BTW: how to get rid of all this stuff after the \0 in the first field
in Python? (Ruby has Z and A, but it seems that the Python 's'
specifier is like 'A' and there is no 'Z' equivalent)
-- 
Eric Jacoboni, ne il y a 1444057108 secondes


From lycka at carmen.se  Mon Feb 13 04:01:47 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Mon, 13 Feb 2006 10:01:47 +0100
Subject: Pulling all n-sized combinations from a list
In-Reply-To: <1139601545.595021.201610@g44g2000cwa.googlegroups.com>
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>
	<1139509392.890581.94470@g43g2000cwa.googlegroups.com>
	<mailman.1675.1139510184.27775.python-list@python.org>
	<1139513265.440321.184530@o13g2000cwo.googlegroups.com>
	<dsg601$ndh$1@wake.carmen.se>
	<1139527129.367077.316590@g44g2000cwa.googlegroups.com>
	<dshvoq$ksm$1@wake.carmen.se>
	<1139601545.595021.201610@g44g2000cwa.googlegroups.com>
Message-ID: <dsphts$3a3$1@wake.carmen.se>

mensanator at aol.com wrote:
> But it turns out he actually had one, which he graciously provided
> in response to my observation. If I had kept my trap shut, I wouldn't
> have it, would I? 

I completely agree, but you could put your "questions" in
a way that increases your chances of helpful replies...
http://www.catb.org/~esr/faqs/smart-questions.html


From fredrik at pythonware.com  Mon Feb  6 06:12:43 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 6 Feb 2006 12:12:43 +0100
Subject: Python V2.4.2 source code
References: <43e710de$0$23286$db0fefd9@news.zen.co.uk><O5FFf.1082$pC6.83@fe11.lga>
	<43e72c34$0$5007$db0fefd9@news.zen.co.uk>
Message-ID: <ds7ave$2vi$1@sea.gmane.org>

John Dean wrote:

> I downloaded what I thought was the source code from
> http://www.python.org/2.4.2/python-2.4.2.tgz

that's an error page:

    Error 404: File Not Found

</F>





From steve at holdenweb.com  Thu Feb 16 18:10:38 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 16 Feb 2006 18:10:38 -0500
Subject: pymssql and date format
In-Reply-To: <1140083940.647586.313700@o13g2000cwo.googlegroups.com>
References: <1140083940.647586.313700@o13g2000cwo.googlegroups.com>
Message-ID: <dt30p9$ri5$1@sea.gmane.org>

eight02645999 at yahoo.com wrote:
> hi
> i am using pymmsql to query a date column in MSSQL database table.
> However the result shows for example
> (datetime.datetime(2006, 2, 16, 17, 50, 19) which is supposed to be
> 2006-02-16 17:50:19.000
> anyway to correct query a date column using pymssql so that it gives
> the correct date format? thanks
> 
It doesn't return a format, it returns a value. I presume you are saying 
that you don't like the way the value prints? Use str() on it:

  >>> str(datetime.datetime(2006, 2, 16, 17, 50, 19))
'2006-02-16 17:50:19'

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From osv at javad.com  Mon Feb 13 12:24:25 2006
From: osv at javad.com (Sergei Organov)
Date: Mon, 13 Feb 2006 20:24:25 +0300
Subject: how do you pronounce 'tuple'?
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
Message-ID: <dsqfca$ai6$1@sea.gmane.org>

John Salerno <johnjsal at NOSPAMgmail.com> writes:

> Yes, silly question, but it keeps me up at night.  :)
>
> I know it comes from the suffix -tuple, which makes me think it's 
> pronounced as 'toople', but I've seen (at m-w.com) that the first 
> pronunciation option is 'tuhple', so I wasn't sure. Maybe it's both, but 
> which is most prevalent?

I just checked my English dictionary, and for, say, "quintuple", it
suggests ['kwintjupl] pronunciation. I didn't check it before, but I
tend to pronounce tuple as [tjupl] indeed (in fact Russians would say it's
closer to [chjupl]).

-- Sergei.



From rupole at hotmail.com  Tue Feb 14 20:49:52 2006
From: rupole at hotmail.com (Roger Upole)
Date: Tue, 14 Feb 2006 20:49:52 -0500
Subject: Python and ASP
References: <1139958137.733403.33640@g44g2000cwa.googlegroups.com>
	<1139961021_9771@sp6iad.superfeed.net>
	<1139967580.352137.246320@f14g2000cwb.googlegroups.com>
Message-ID: <1139968235_9917@sp6iad.superfeed.net>

ASP files have to be served up by a web server.

       Roger

"Tempo" <bradfordh at gmail.com> wrote in message news:1139967580.352137.246320 at f14g2000cwb.googlegroups.com...
> It still doesn't work. I fixed that one error that you pointed out
> Roger Upole, but it still isn't working. All I did was copy and past
> the code above, plus Roger's fix, into Notepad2 and saved it as a
> '.asp'. When I opened it in Firefox, all that showed up was the source
> code of the file. It seems like it is reading the '.asp' file as a text
> file in the web browser. Any further ideas? Thanks.
> 




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From mensanator at aol.com  Mon Feb 13 15:13:38 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 13 Feb 2006 12:13:38 -0800
Subject: Pulling all n-sized combinations from a list
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>
	<1139509392.890581.94470@g43g2000cwa.googlegroups.com>
	<mailman.1675.1139510184.27775.python-list@python.org>
	<1139513265.440321.184530@o13g2000cwo.googlegroups.com>
	<dsg601$ndh$1@wake.carmen.se>
	<1139527129.367077.316590@g44g2000cwa.googlegroups.com>
	<dshvoq$ksm$1@wake.carmen.se>
	<1139601545.595021.201610@g44g2000cwa.googlegroups.com>
	<dsphts$3a3$1@wake.carmen.se>
Message-ID: <1139861618.098084.250350@g14g2000cwa.googlegroups.com>


Magnus Lycka wrote:
> mensanator at aol.com wrote:
> > But it turns out he actually had one, which he graciously provided
> > in response to my observation. If I had kept my trap shut, I wouldn't
> > have it, would I?
>
> I completely agree, but you could put your "questions" in
> a way that increases your chances of helpful replies...
> http://www.catb.org/~esr/faqs/smart-questions.html

Ok, but I wasn't asking a question. I was answering the
question "why is nobody using my program?". Now, if _I_
had specifically asked how _I_ could use his program,
then the snide remarks about the availability of free
compilers on the Internet would have been somewhat
justified. I had already given up any hope of ever running
probstat, so I wasn't really looking for an answer since
I was already aware of what it would take for me to
compile it on Windows. It was just a lucky coincidence
that by mentioning Windows, JD replied that he had
a pyd available.

And, strange as it may seem, asking questions the
smart way is sometimes less effective than being a
smartass. Given a chance to say

  idiot, you're wrong and here's why...

people will jump all over you. Take this thread,
for example. Of course, if they just call you an idiot
then you haven't gained anything.

But there's nobody like that on comp.lang.python, right?



From nephish at xit.net  Mon Feb  6 12:04:38 2006
From: nephish at xit.net (nephish at xit.net)
Date: 6 Feb 2006 09:04:38 -0800
Subject: check to see if value can be an integer instead of string
In-Reply-To: <pan.2006.01.19.23.06.14.860515@gmx.net>
References: <1137549772.543188.69240@g44g2000cwa.googlegroups.com>
	<dqk8r0$ou2$1@newsreader3.netcologne.de>
	<pan.2006.01.19.23.06.14.860515@gmx.net>
Message-ID: <1139245478.665478.88050@o13g2000cwo.googlegroups.com>

Thanks guys,
No, i did not know about isdigit ?
very helpful. Thanks.

esp liked the "overloaded doohicky' bit.

thanks again.



From iddw at hotmail.com  Mon Feb 13 19:14:44 2006
From: iddw at hotmail.com (Dave Hansen)
Date: Mon, 13 Feb 2006 18:14:44 -0600
Subject: invert the order of a string
References: <dsr600$9sj$1@solaris.cc.vt.edu>
	<6272v111vee95606gd7fucjdqmec8uhc7e@4ax.com>
	<dsr6n3$amh$1@solaris.cc.vt.edu>
Message-ID: <aq72v1l60fo3rv1r8oq9np7nc7i5ikueer@4ax.com>

On Mon, 13 Feb 2006 19:03:32 +0000 in comp.lang.python, rtilley
<rtilley at vt.edu> wrote:

>Dave Hansen wrote:
>> How about 
>> 
>> s = "some random string"
>> print s
>> s = s[::-1]
>> print s
>
>That looks like Perl, but it works. Makes me wonder with the string 
>module doesn't have a reverse or invert function?

It's just simple slicing.  Well, maybe not so simple, or at least not
so common, but with a syntax similar to the range function.  Consider
the following (string chosen to make it obvious what's going on):

s = "0123456789"
s[::]
s[3::]
s[:3:]
s[::3]
s[::-2]
s[-2::-2]

Regards,
                                        -=Dave

-- 
Change is inevitable, progress is not.


From ian at excess.org  Thu Feb  9 00:00:07 2006
From: ian at excess.org (Ian Ward)
Date: Thu, 09 Feb 2006 00:00:07 -0500
Subject: Replacing curses
In-Reply-To: <1139451439.115775.223250@g43g2000cwa.googlegroups.com>
References: <mailman.1566.1139345769.27775.python-list@python.org>
	<43E9234B.6030108@v.loewis.de>
	<mailman.1588.1139372460.27775.python-list@python.org>
	<11uk55h47lruk18@corp.supernews.com>
	<mailman.1611.1139422272.27775.python-list@python.org>
	<11ukf0ci8d6ac64@corp.supernews.com>
	<mailman.1620.1139429435.27775.python-list@python.org>
	<11ul1mgplrah63e@corp.supernews.com>
	<1139451439.115775.223250@g43g2000cwa.googlegroups.com>
Message-ID: <43EACC57.4070603@excess.org>

Ross Ridge wrote:
> Thomas Dickey wrote:
>>...and send UTF-8 text, keeping track of where you really are on the screen.
> You make that sound so easy.

I'll have to deal with that anyway, since I'm doing all my own wrapping,
justification and clipping of text.  (don't talk to me about RtoL text,
I'm getting to it)

I'm going to look at the Mined text editor for some terminal behavior
detection code.  Mined is able to produce good UTF-8 output on a variety
of terminals, and it links agains ncurses, not ncursesw...  Interesting.

Ian Ward




From tdelaney at avaya.com  Sun Feb 19 18:08:48 2006
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Mon, 20 Feb 2006 10:08:48 +1100
Subject: Which is faster? (if not b in m) or (if m.count(b) > 0)
Message-ID: <2773CAC687FD5F4689F526998C7E4E5F07434D@au3010avexu1.global.avaya.com>

Farel wrote:

> Tim, Are you saying that:
>      not (b in m)
> is faster than:
>     b not in m

On the contrary. `not (b in m)` requires negating the result of `b in m`
(via an additional bytecode operation). `b not in m` doesn't. However,
the difference in performance is minimal, as testing using the timeit
module will show you.

The important difference is the improvement in clarity. There is no
possibility for misinterpretation as to the meaning of `b not in m`,
whereas with the original `not b in m` I had to actually go check the
precedence rules to be sure what would happen. Adding the parentheses
makes it clear, but doesn't read as well as using the `not in` operator.

As others have said, if you really care about the performance of
something, the timeit module is your friend. Discussions about *why* you
get certain performance results are then useful.

Tim Delaney


From john.orlando at gmail.com  Thu Feb  9 19:26:23 2006
From: john.orlando at gmail.com (john.orlando at gmail.com)
Date: 9 Feb 2006 16:26:23 -0800
Subject: Simple Tkinter app works in Linux, not in Windows
Message-ID: <1139531183.792405.148600@o13g2000cwo.googlegroups.com>

Hello,
I'm a newbie to Python (literally, within the last two weeks), and I am
playing around with Tkinter to build some simple GUIs.  I am attempting
to build a simple class that displays a GIF.  Here is the code:

#start of code
from Tkinter import *

class DisplayPict(Frame):

    def __init__(self,parent=None):
        Frame.__init__(self,parent)
        self.pack()
        self.img=PhotoImage(file="moon.gif")
        self.can=Canvas(self)
        self.can.create_image(2,2,image=self.img,anchor=NW)
        self.can.pack(fill=BOTH)

        #keep a reference to the img around
        self.can.photo=self.img

if __name__ == '__main__': DisplayPict().mainloop()
#end of code

Anyway, I started with this code in Windoze using IDLE, and everytime I
ran it I kept getting an empty frame (well, presumably with a Canvas
that had nothing in it).  I kept thinking that it had to be something
to do with the whole images-get-garbage-collected-if-not-referenced
issue that I read so much about.  So I tried a bunch of different
permutations and nothing made a difference.

On a whim, I tried this code under Linux, and amazingly, it worked just
fine: the image was displayed as expected.

So...I am confused.  I tried to do my homework (i.e., read through
"Programming Python", "Learning Python", and scouring the internet),
but I can't come up with an explanation as to why this doesn't work
under Windoze.  Can anyone out there show me the error in what I have?

Thanks in advance,
John O



From luis_lupe2XXX at netvisaoXXX.pt  Sun Feb  5 21:05:24 2006
From: luis_lupe2XXX at netvisaoXXX.pt (Luis P. Mendes)
Date: Mon, 06 Feb 2006 02:05:24 +0000
Subject: psycopg2 rounds unix time
Message-ID: <44np6pF3445fU1@individual.net>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi,

I've inserted a couple hundred rows in a table in Postgres via psycopg2.

The first field of each row is a certain unix time (since epoch) when an
event occured.
When I try to access that database with psycopg2, I get rounded values
for the unix time field.

example:
unix time inserted at first row: 1138839839.64456
unix time as retrieved in psql: 1.13884e+09
unix time retrieved by psycopg2: 1138840000.0

Is this a bug?

I'm using:
Python 2.3.5
in a Debian Sarge box
PostgreSQL 7.4.7
psycopg2-2.0b6

Luis P. Mendes
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.1 (GNU/Linux)
Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org

iD8DBQFD5q7kHn4UHCY8rB8RAvh0AJ4nr6239OT6vweUVEF3Htq8smaCJQCgoVnY
NZXZdAyq9UmNXdlOxtwN2y8=
=ZawE
-----END PGP SIGNATURE-----


From xavier.morel at masklinn.net  Sun Feb  5 12:19:04 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Sun, 05 Feb 2006 18:19:04 +0100
Subject: Learning Python
In-Reply-To: <1139156577.897100.69140@g43g2000cwa.googlegroups.com>
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
	<ds588v$6s4$02$1@news.t-online.com>
	<1139156577.897100.69140@g43g2000cwa.googlegroups.com>
Message-ID: <ds5bts$cej$1@aphrodite.grec.isp.9tel.net>

Byte wrote:
> p.s. Xavier Morel, you seem to be using Windows, not Linux
> 
I don't see how this may even remotely be relevant, Python is cross 
platform and (mostly) works the same regardless of the OS

 > I got
 > the idea of stacking input on a raw_input from the official Python
 > Tutorial.
 >
Reference please, I never saw that anywhere in the tutorial


From reply.in.the.newsgroup at my.address.is.invalid  Sun Feb  5 17:55:29 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Sun, 05 Feb 2006 23:55:29 +0100
Subject: Strange behavior with os call in cgi script
References: <1139171873.431432.195080@f14g2000cwb.googlegroups.com>
	<43e665f1$1@news.uni-ulm.de>
	<1139176638.972414.19590@g47g2000cwa.googlegroups.com>
Message-ID: <tf0du1h7sn03joag0cpjkmtm6hgfg2ppnv@4ax.com>

sophie_newbie:
>OK, interesting, but just how dow I print he environment in the
>program??

Add logging to your program:
http://www.python.org/doc/2.3.5/lib/module-logging.html

And log the environment:
http://www.python.org/dev/doc/newstyle/lib/os-procinfo.html

-- 
Ren? Pijlman


From kenneth.s.chan at gmail.com  Fri Feb 17 11:16:21 2006
From: kenneth.s.chan at gmail.com (kenneth.s.chan at gmail.com)
Date: 17 Feb 2006 08:16:21 -0800
Subject: Python Oracle Interace on Solaris
Message-ID: <1140192981.811047.73200@g47g2000cwa.googlegroups.com>

I am trying to use Python to do queries on a Oracle database using a
Solaris box. I have seen tools such as cx_Oracle which would be good
except that my Solaris box does not have an Oracle installation. Do I
need to have an Oracle installation on my Solaris box to access the
Oracle database (which is on another machine)? Are there ways to access
an Oracle database and do queries without having a local copy of Oracle
installed? Thanks.



From eoinrogers at gmail.com  Mon Feb 13 13:09:44 2006
From: eoinrogers at gmail.com (Byte)
Date: 13 Feb 2006 10:09:44 -0800
Subject: Location of Python modules
Message-ID: <1139854184.504114.46690@z14g2000cwz.googlegroups.com>

Pretty much self explanatry, where are Python modules stored in Linux?
(i.e. in /usr/bin/local, or where?)



From tim at pollenation.net  Tue Feb  7 14:21:31 2006
From: tim at pollenation.net (Tim Parkin)
Date: Tue, 07 Feb 2006 19:21:31 +0000
Subject: Is Python good for web crawlers?
In-Reply-To: <1139337657.702268.14260@o13g2000cwo.googlegroups.com>
References: <1139330008.270988.227170@g44g2000cwa.googlegroups.com>	<mailman.1555.1139330693.27775.python-list@python.org>	<1139332188.851343.20580@g14g2000cwa.googlegroups.com>	<44s30nF38tqrU1@uni-berlin.de>	<1139333229.770945.215990@g43g2000cwa.googlegroups.com>	<mailman.1558.1139333766.27775.python-list@python.org>
	<1139337657.702268.14260@o13g2000cwo.googlegroups.com>
Message-ID: <43E8F33B.4000808@pollenation.net>

Tempo wrote:

>I took your advice and got a copy of BeautifulSoup, but I am having
>trouble installing the module. Any advice? I noticed that I just can't
>put it into the 'lib' directory of python to install it.
>
>  
>
Just save the file in the same directory as your project then you should
be able to use the sample code.

Tim Parkin


From john_sips_teaz at yahooz.com  Mon Feb 27 02:05:00 2006
From: john_sips_teaz at yahooz.com (John M. Gabriele)
Date: Mon, 27 Feb 2006 02:05:00 -0500
Subject: automatic html generation for documentation?
In-Reply-To: <1140768059.871220.110300@j33g2000cwa.googlegroups.com>
References: <1140768059.871220.110300@j33g2000cwa.googlegroups.com>
Message-ID: <9AxMf.3279$6V.1856@fe09.lga>

Lonnie Princehouse wrote:
> I plan on writing some documentation that will consist of blocks of
> commentary with interspersed snippets of syntax-colored Python code and
> the occaisional image.
> 
> Does anyone know of a package that will take a high level description
> of what I just described and auto-generate clean-looking web pages,
> including syntax coloring?   I'm already using epydoc for API reference
> generation; what I'm looking for here is just something to help out
> with the narrative so I don't have to spend lots of time fiddling with
> HTML.
> 

The Python wiki http://wiki.python.org/moin/FrontPage uses moinmoin
and their pages contain syntax highlighted (highlit? ;) ) Python code.

Of course, there's always source-highlight
http://www.gnu.org/software/src-highlite/source-highlight.html
which you may be able to work into your current solution with
a little glue.

In fact, come to think of it, if your editor is up to snuff, you
could simply paste the code into your html doc, select that code
in the editor, then filter it through source-highlight in-place.
I use NEdit and I think that could do it easily.

---J
-- 
(remove zeez if demunging email address)


From peter at engcorp.com  Sun Feb  5 19:28:29 2006
From: peter at engcorp.com (Peter Hansen)
Date: Sun, 05 Feb 2006 19:28:29 -0500
Subject: translating PHP to Python
In-Reply-To: <ds5tur$a3$2@wake.carmen.se>
References: <1139164228.608430.13120@g44g2000cwa.googlegroups.com>	<6ErFf.3267$MJ.1302@fed1read07>	<1139167762.095956.180350@g14g2000cwa.googlegroups.com>	<mailman.1449.1139169883.27775.python-list@python.org>
	<ds5tur$a3$2@wake.carmen.se>
Message-ID: <ds6576$ui9$1@sea.gmane.org>

Magnus Lycka wrote:
> Peter Hansen wrote:
>>Good you clarified that, because "parent" definitely isn't used that way 
>>by most other people here. 
> 
> Unless they are coding GUIs? I guess it's pretty common that GUI
> controls are contained in other controls called parents. At least
> that's how it's done in wxPython.

Entirely true... good point.  I suppose I should say instead that "in 
the context of Object-Oriented Programming, the term 'parent class' 
almost universally refers to the superclass of a class, while the term 
'parent object' is ambiguous and might refer to the object from which 
another object is created provided a reference the creating object is 
passed in to the constructor."  :-)

(I notice the OP's original post refers to parent object, while his 
clarification refers to parent class... to add to the confusion.)

-Peter



From tdickenson at devmail.geminidataloggers.co.uk  Tue Feb 28 13:34:14 2006
From: tdickenson at devmail.geminidataloggers.co.uk (Toby Dickenson)
Date: Tue, 28 Feb 2006 18:34:14 +0000
Subject: PEP 354: Enumerations in Python
In-Reply-To: <87accdplbj.fsf@rose.polar.local>
References: <87accdplbj.fsf@rose.polar.local>
Message-ID: <200602281834.14174.tdickenson@devmail.geminidataloggers.co.uk>

On Monday 27 February 2006 02:49, Ben Finney wrote:

> Coercing a value from an enumeration to a ``str`` results in the
> string that was specified for that value when constructing the
> enumeration::

That sentence seems to assume that all enumeration values will have been 
specified as strings. Thats reasonable, but your description of the creation 
of an enumeration doesnt specify that.

> An enumerated type is created from a sequence of arguments to the
> type's constructor::
> 
>     >>> Weekdays = enum('sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat')
>     >>> Grades = enum('A', 'B', 'C', 'D', 'F')

s/arguments/strings/

?

-- 
Toby Dickenson


From Ido.Yehieli at gmail.com  Tue Feb 28 14:32:05 2006
From: Ido.Yehieli at gmail.com (Ido Yehieli)
Date: 28 Feb 2006 11:32:05 -0800
Subject: Threading - will threads run in parallel?
In-Reply-To: <1141154405.709674.325760@t39g2000cwt.googlegroups.com>
References: <1141154405.709674.325760@t39g2000cwt.googlegroups.com>
Message-ID: <1141155125.833191.265460@e56g2000cwe.googlegroups.com>

>> Also, is it possible to split off a program for the terminal that
>> started it? As in I type in python test.py and test.py runs in the
>> background and lets me do other things in that terminal?

try:
python test.py &



From peter at engcorp.com  Mon Feb  6 13:13:44 2006
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 06 Feb 2006 13:13:44 -0500
Subject: Question about idioms for clearing a list
In-Reply-To: <pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au>
References: <mailman.1294.1138727665.27775.python-list@python.org>	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>	<mailman.1489.1139232969.27775.python-list@python.org>
	<pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au>
Message-ID: <ds83kd$98m$1@sea.gmane.org>

Steven D'Aprano wrote:
> Perhaps it is arguable that there is no need for a clear method because
> L[:] = [] is so easy to do. Personally, while I agree that it is easy, it
> is hardly intuitive or obvious, and I too would prefer an explicit clear
> method for mutable sequences.

Possibly another case where "patches are welcome"...



From Enoodle at gmail.com  Sun Feb 26 15:00:06 2006
From: Enoodle at gmail.com (Enoodle at gmail.com)
Date: 26 Feb 2006 12:00:06 -0800
Subject: How can I redirect print function to an output file?
In-Reply-To: <1140983197.579809.93850@v46g2000cwv.googlegroups.com>
References: <1140983197.579809.93850@v46g2000cwv.googlegroups.com>
Message-ID: <1140984006.472846.35890@e56g2000cwe.googlegroups.com>

http://diveintopython.org/scripts_and_streams/stdin_stdout_stderr.html

example 10.9 , redurectung output



From bonono at gmail.com  Sun Feb 26 10:31:09 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 26 Feb 2006 07:31:09 -0800
Subject: Is Python a Zen language?
In-Reply-To: <1140965945.834501.62940@e56g2000cwe.googlegroups.com>
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
	<1140931766.200951.321320@t39g2000cwt.googlegroups.com>
	<1140963005.123017.90890@t39g2000cwt.googlegroups.com>
	<1140965945.834501.62940@e56g2000cwe.googlegroups.com>
Message-ID: <1140967869.049061.200980@e56g2000cwe.googlegroups.com>


Andr? wrote:
> Some "purist", like the Academie Francaise (or, apparently "Crutcher")
> seem to believe that "one" can restrict the meaning of words, or the
> evolution of language.  The rest of us are happy to let language
> evolution take place to facilitate communication.

So instead of Zen of Python, we can also call it Spam of Python ?



From n.estner at gmx.de  Fri Feb  3 06:23:00 2006
From: n.estner at gmx.de (n.estner at gmx.de)
Date: 3 Feb 2006 03:23:00 -0800
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<donn-C3B8DF.14535302022006@gnus01.u.washington.edu>
	<1138926741.052843.169270@z14g2000cwz.googlegroups.com>
	<donn-AC8404.17325802022006@gnus01.u.washington.edu>
Message-ID: <1138965780.698016.95590@o13g2000cwo.googlegroups.com>

> That usage (self is second parameter to B.test) is bound
> to cause trouble in general, but in this case doesn't have
> any effect I can see.  The function call "test" would be
> resolved from its first parameter, instance of A, and that
> function would return 1.  One of us is missing something
> here, could be me.

Probably my example wasn't clear, let's try another:

  class A:
    def test(a, **kwargs): return 1
  class B:
    def test(b, **kwargs): return 2
  test(a=A(), b=B())

"self" isn't a keyword, so nothing should forbid this code. What is the
interpreter to do if it stumbles across this "test" call? I mean,
named-argument lookup is a tricky thing even if you do know what
function you're calling. If this would depend on one of the parameters,
I think it would become completely unintelligible. (you can think of
more complex examples yourself)

> That's exactly the problem, it doesn't read from left to right,
> because we swap back and forth between function(parameter and
> parameter.function notation.

That's because they're doing two different things: object.method() does
an attribute lookup, while function(parameter) looks for the function
in the current scope.



From aleaxit at yahoo.com  Mon Feb 20 11:12:23 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 20 Feb 2006 08:12:23 -0800
Subject: How many web framework for python ?
References: <mailman.2085.1140244423.27775.python-list@python.org>
	<43f8718e$0$7344$626a54ce@news.free.fr>
	<1hazzon.19mvhkv6sr8wiN%aleaxit@yahoo.com>
	<43f9c518$0$3317$636a55ce@news.free.fr>
Message-ID: <1hb1t62.hp67bf1jzs91cN%aleaxit@yahoo.com>

bruno at modulix <onurb at xiludom.gro> wrote:

> Alex Martelli wrote:
> > Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote:
> >    ...
> >>>There are very good web framework for java and ruby ,
> >>>Is there one for python ?
> >>
> >>In fact, there are actually too much *good* python web frameworks.
> > 
> > Dear Mr. BDFL,
> > 
> > there are too many good web frameworks nowadays. Please eliminate three.
> 
> Seems like I should have added a smiley somewhere...

Naah, smileys unneeded -- you'll notice that my "I am not a crackpot"
comment was unsmilied either (and nobody nominated it for QOTW, darn!).
Having just coincidentally finished wrapping up the 2nd edition's
Nutshell first draft of the chapter on serverside web programming, after
a long time researching all the alternatives I've given up on even
MENTIONING all of the frameworks available, much less providing any
in-depth coverage, so I'm quite sensitized to the situation!-)


Alex


From steve at REMOVETHIScyber.com.au  Sun Feb 12 12:18:51 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Mon, 13 Feb 2006 04:18:51 +1100
Subject: Is python very slow compared to C
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
	<1139754010.067582.214830@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>
	<mailman.1785.1139762698.27775.python-list@python.org>
Message-ID: <pan.2006.02.12.17.18.50.356928@REMOVETHIScyber.com.au>

On Sun, 12 Feb 2006 17:44:50 +0100, PA wrote:

> On Feb 12, 2006, at 16:11, Steven D'Aprano wrote:
> 
>> availability of skilled programmers is absolutely critical for the use 
>> of a language.
> 
> By that measure, we should all be using Java, no?

I said nothing about whether Lua or Ocaml were good languages to take up
if you want to learn a programming language. In fact, it follows from
simple economics that individual developers should avoid languages that
are too popular. No matter how good you are as a Visual Basic programmer,
the price you can command will be pushed downwards by competition with
millions of other VB programmers.

I was talking about the other side of the equation. If you are hiring
developers to work for you, it is absolutely critical that there is no
shortage of skillful programmers in the language(s) you use. "No shortage"
doesn't mean "only use Java" -- there are disadvantages to Java that
outweigh the fact that there is no shortage of developers.


> "TIOBE Programming Community Index"
> http://www.tiobe.com/tpci.htm
> 
>> By comparison, even Forth gives 13 million plus hits, and who uses 
>> Forth?
> 
> Anyone writing in English:
> 
> http://www.answers.com/forth&r=67

Which might be relevant if I searched for "forth", but I didn't. I googled
on "forth programming". Yes, there will be some false positives, but I
never claimed that this was anything more than a rough and imprecise
estimate of the availability of resources for the languages.


>> Lua appears to be *too* lightweight, without even classes or 
>> inheritance,
> 
> Programming in Lua
> Object-Oriented Programming
> http://www.lua.org/pil/16.html

Did you actually bother to read the page you linked to? It describes how
you can emulate object-like behaviour for Lua tables. The following page
is even more explicit: "Lua does not have the concept of class".

That means that the object-oriented framework, which you get for free in
Python, has to be at least partially handled by the programmer in Lua.
Perhaps Lua makes it easy to do, but it is still something that doesn't
need to be done in Python because it is already there.


>> and a single data type where Python has dicts, sets, tuples and lists.
> 
> "Lua gives you the power; you build the mechanisms."
> -- Roberto Ierusalimschy, "Programming in Lua", December 2003
> http://www.lua.org/pil/12.1.2.html

Which is fine, but the more mechanisms you have to build, the longer it
will take you to actually get to the important work, which is putting it
all together to create your application.



-- 
Steven.



From tuvas21 at gmail.com  Mon Feb 20 15:43:36 2006
From: tuvas21 at gmail.com (Tuvas)
Date: 20 Feb 2006 12:43:36 -0800
Subject: Canvas clicking stuff
In-Reply-To: <mailman.2179.1140468081.27775.python-list@python.org>
References: <1140466964.673708.207240@o13g2000cwo.googlegroups.com>
	<mailman.2179.1140468081.27775.python-list@python.org>
Message-ID: <1140468216.204636.270220@z14g2000cwz.googlegroups.com>

Ahh, exactly what I was looking for. Thanks for the help!


Fredrik Lundh wrote:
> Tuvas wrote:
>
> > I have a picture that is being displayed on a canvas interface, that I
> > want to do the following. When a mouse button is clicked on the canvas,
> > I want to pass to a function the X and Y coordinates of where this
> > mouse button was pushed.
>
> use event bindings:
>
> http://effbot.org/tkinterbook/tkinter-events-and-bindings.htm
> 
> </F>



From k04jg02 at kzoo.edu  Sat Feb  4 15:28:35 2006
From: k04jg02 at kzoo.edu (Joseph Garvin)
Date: Sat, 04 Feb 2006 15:28:35 -0500
Subject: Generators vs. Functions?
In-Reply-To: <0001HW.C00ABC2B000323A6F0335550@news.individual.de>
References: <0001HW.C00ABC2B000323A6F0335550@news.individual.de>
Message-ID: <43E50E73.40504@kzoo.edu>

Wolfgang Keller wrote:

>If this is actually also true in the general case, and not due to eventual 
>non-representativeness of the test mentioned above, is it simply due to a 
>less-than-optimum implementation of generators in the current Pyython 
>interpreter and thus likely to change in the future or is this a matter of 
>principle and will consequently remain like this forever?
>  
>

I am not a CPython or PyPy hacker, but I would guess that it will always 
be slower as a matter of principal. When resuming a generator you have 
to resetup the state the function was in when it was last called, which 
I think should always be more costly than calling the function with a 
clean state.

Someone want to correct me?

Whether or not the difference is that significant though I am unsure. It 
may be small enough that for most applications no one cares.


From robert.kern at gmail.com  Sat Feb  4 01:33:35 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 04 Feb 2006 00:33:35 -0600
Subject: cannot install scipy
In-Reply-To: <1139013871.122256.202130@g43g2000cwa.googlegroups.com>
References: <1139013871.122256.202130@g43g2000cwa.googlegroups.com>
Message-ID: <ds1hs0$1c5$1@sea.gmane.org>

nitro wrote:
> Hi,
> 
> I am using a Debian system. I installed NumPy and everything works
> well. When I try to install SciPy, I get the following error. Any help
> would be appreciated.
> 
> ===
> idf at server1:~/scipy/scipy-0.4.4$ python setup.py install
> import core -> failed:
> /usr/lib/python2.3/site-packages/numpy/core/multiarray.so: undefined
> symbol: PyOS_ascii_strtod
> import random -> failed: 'module' object has no attribute 'dtype'
> import lib -> failed:
> /usr/lib/python2.3/site-packages/numpy/core/multiarray.so: undefined
> symbol: PyOS_ascii_strtod
> Fatal Python error: can't initialize module lapack_lite
> Aborted
> idf at server1:~/scipy/scipy-0.4.4$

The extension modules got linked wrong, somehow, and aren't linked with the
Python shared library. I've never seen that particular error, though. I'd be
happy to help you through this on numpy-discussion at lists.sourceforge.net . We
will probably need to see the output of the numpy build.

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From tjreedy at udel.edu  Mon Feb  6 13:40:17 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 6 Feb 2006 13:40:17 -0500
Subject: in over my head ascii
References: <1139245216.350356.272170@z14g2000cwz.googlegroups.com>
Message-ID: <ds858a$g75$1@sea.gmane.org>


<nephish at xit.net> wrote in message 
news:1139245216.350356.272170 at z14g2000cwz.googlegroups.com...
> for example , to send a request, the first three bytes have to be ascii
> "STX"
> then there has to be  4 bytes that show the length of the message
> then the actual message
> then the last three bytes have to be "ENX"
>
> also all int variables must me unsigned long-int (32 bit).
>
> so here is what i need to know,
> 1 how do i make something in ascii bytes to send off to this server ?

Python strings are full 8-bit byte strings.  Whether you should retrict 
bytes to ASCII bytes only depends on the situation.  According to what you 
said above, the server wants the number in binary rather than as ascii 
digits.

Other than that, send "STX", the number, your message, and "ENX"

> 2 how can i make sure something is a 32bit unsigned long int. ?

Look at the struct and/or array modules.  I suspect that you may have to 
pay attention to whether the server want the binary in big or little endian 
format.

Terry Jan Reedy





From kent at kentsjohnson.com  Wed Feb  8 09:17:08 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Wed, 08 Feb 2006 09:17:08 -0500
Subject: UnboundMethodType and MethodType
In-Reply-To: <43e9635b$1@nntp0.pdx.net>
References: <dsbl2g$i1b$1@news2.rz.uni-karlsruhe.de> <43e9635b$1@nntp0.pdx.net>
Message-ID: <43e9f92c$1_3@newspeer2.tds.net>

Kirk McDonald wrote:

> I think it's perfectly consistent:
> 
>  >>> class B(object):
> ...     def bar(self): pass
> ...
>  >>> B.bar
> <unbound method B.bar>
>  >>> type(B.bar)
> <type 'instancemethod'>
>  >>> b = B()
>  >>> b.bar
> <bound method B.bar of <__main__.B object at 0xb7bd544c>>
>  >>> type(b.bar)
> <type 'instancemethod'>
>  >>> id(B.bar)
> -1211888788
>  >>> id(b.bar)
> -1211888788
> 
> It's the same function, whether it's bound or not. Thus, it should 
> always have the same type. 

No, it's not the same function. You got the same id because you didn't 
bind B.bar and b.bar to anything so the id was reused.

  >>> class B(object):
  ...   def bar(self): pass
  ...
  >>> Bbar = B.bar
  >>> bbar = B().bar
  >>> Bbar
<unbound method B.bar>
  >>> bbar
<bound method B.bar of <__main__.B object at 0x008759B0>>
  >>> id(Bbar)
10751312
  >>> id(bbar)
10736624
  >>> Bbar is bbar
False

Kent


From albert at compuscan.co.za  Thu Feb  9 03:54:45 2006
From: albert at compuscan.co.za (Albert Leibbrandt)
Date: Thu, 09 Feb 2006 10:54:45 +0200
Subject: Inserting record with Microsoft Access
In-Reply-To: <dse868+n819@eGroups.com>
References: <dse868+n819@eGroups.com>
Message-ID: <43EB0355.9000603@compuscan.co.za>



jeffhg582003 wrote:

>Hi,
>
>I am developing a python script which add records to 
>a microsoft access tables. All my tables have autogenerated number
>fields. I am trying to capture the number generated from the insert but
>I am not exactly sure how to do that after an insert.
>
>Thanks,
>Jeff
>
>
>
>  
>
I had to do something similiar in sql server and the experts back then 
told me that the only way is to write a stored procedure. aparently sql 
server does not have sequences and I am guessing that access is the same.

cheers
albert

-- 
Albert Leibbrandt
Data Manager
CompuScan Holdings (Pty) Ltd
Brandwacht Office Park
Stellenbosch.
South Africa.
Tel;+27 (0)21-8886000
Fax;+27 (0)21-8832336
National: 0861 51 41 31
E-Mail : albert at compuscan.co.za

www.compuscan.co.za - reducing credit risk and fraud, at the same time protecting the consumer against over-indebtedness and reckless borrowing

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From strombrg at dcs.nac.uci.edu  Thu Feb 16 02:05:38 2006
From: strombrg at dcs.nac.uci.edu (Dan Stromberg)
Date: Thu, 16 Feb 2006 07:05:38 GMT
Subject: Databases and python
Message-ID: <pan.2006.02.14.08.06.18.754312@dcs.nac.uci.edu>


I've been putting a little bit of time into a file indexing engine in
python, which you can find here:
http://dcs.nac.uci.edu/~strombrg/pyindex.html

It'll do 40,000 mail messages of varying lengths pretty well now, but I
want more :)

So far, I've been taking the approach of using a single-table database
like gdbm or dbhash (actually a small number of them, to map filenames to
numbers, numbers to filenames, words to numbers, numbers to words,
and numbered words to numbered filenames), and making each entry keyed by
a word, and under the word in the database is a null terminated list of
filenames (in http://dcs.nac.uci.edu/~strombrg/base255.html representation).

However, despite using http://dcs.nac.uci.edu/~strombrg/cachedb.html module
to make the database use faster, bringing in psyco, and studying various
python optimization pages, the program just isn't performing like I'd like
it to.

And I think it's because despite the caching and minimal representation
conversion, it's still just too slow converting linear lists to arrays
back and forth and back and forth.

So this leads me to wonder - is there a python database interface that
would allow me to define a -lot- of tables?  Like, each word becomes a
table, and then the fields in that table are just the filenames that
contained that word.  That way adding filenames to a word shouldn't bog
down much at all.

-But-, are there any database interfaces for python that aren't going to
get a bit upset if you try to give them hundreds of thousands of tables?

Thanks!



From irvine.david at gmail.com  Wed Feb 15 18:53:18 2006
From: irvine.david at gmail.com (dirvine)
Date: 15 Feb 2006 15:53:18 -0800
Subject: by reference
In-Reply-To: <43f05b31$0$11063$e4fe514c@news.xs4all.nl>
References: <mailman.1681.1139517426.27775.python-list@python.org>
	<1139598954.259297.74290@o13g2000cwo.googlegroups.com>
	<43ef1edd$0$4165$636a55ce@news.free.fr>
	<1139789393.053912.15310@g14g2000cwa.googlegroups.com>
	<43f05b31$0$11063$e4fe514c@news.xs4all.nl>
Message-ID: <1140047598.602583.170040@g43g2000cwa.googlegroups.com>

Many thanks Martin

You right - possible and ugly. Looks  like I will doing a from
__future__ as it looks better and perhaps this ugly method may be
depreciated.

Thanks again for your help
David
Martin P. Hellwig wrote:
> dirvine wrote:
> > Yes I did
> >
> > I was trying to do something like (pseudo code)
> >
> > write:
> > get files in path
> > for each filename get size, type
> > create dic called filename assign size:xx,type:y
> > pickle to file
> >
> > read:
> > open pickled file
> > read dict name and contents (hoping unpickling file gives me the dict
> > name as it was saved, which may not be true)
> > do stuff with file
> >
> >
> > and thats it. My prog is a bit more complex than this but this is the
> > general idea basically read files -> create dicts of files one at a
> > time, very similar to bittorrent in that take a file smash to bits and
> > store links to bits in a big file.
> >
> > Many thanls
> > David
> >
>
> Well, although I still think you should use nested dicts doesn't say
> that what you want isn't possible, take a look at this snippet:
>  >>> locals()['test']=dict()
>  >>> test
> {}
>  >>>
> It looks quite ugly too me but that is probably in the eye of the
> beholder. However even the faq has some info on that:
> http://www.python.org/doc/faq/programming.html#how-do-i-use-strings-to-call-functions-methods
> 
> -- 
> mph



From petr at tpc.cz  Tue Feb  7 17:32:09 2006
From: petr at tpc.cz (Petr Jakes)
Date: 7 Feb 2006 14:32:09 -0800
Subject: tricky regular expressions
In-Reply-To: <1139343779.721205.221410@f14g2000cwb.googlegroups.com>
References: <1139343779.721205.221410@f14g2000cwb.googlegroups.com>
Message-ID: <1139351528.999976.205430@g43g2000cwa.googlegroups.com>

try to google for "finit state machine" OR "state machine" OR FSM

titles =["USELESS DATA","Request : Play",
"USELESS DATA","Title: Beethoven's 5th",
"USELESS DATA","Request : next","USELESS DATA",
"Title:  song# 2 ","USELESS DATA","Request : Play",
"USELESS DATA","Title: Beethoven's 5th",
"USELESS DATA","Request : next","USELESS DATA",
"Title:  song# 3 ","USELESS DATA","Request : Play"]


for title in range(len(titles)):
    if titles[title][:6] =="Title:":
        x=1
        try:
            while titles[title+x]!="Request : Play" and
titles[title+x]!="Request : next":
                x+=1
                pass
            print titles[title], titles[title+x]
        except IndexError: pass


HTH

Petr Jakes
PS: just wonder why are you asking the same question in two different
topics....



From johnjsal at NOSPAMgmail.com  Mon Feb 13 16:36:27 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 13 Feb 2006 21:36:27 GMT
Subject: how do you pronounce 'tuple'?
In-Reply-To: <dsqtq7$mju$1@online.de>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
	<mailman.1857.1139863723.27775.python-list@python.org>
	<Wj6If.1606$No6.38150@news.tufts.edu> <dsqtq7$mju$1@online.de>
Message-ID: <vZ6If.1612$No6.38089@news.tufts.edu>

Peter Maas wrote:

> I wouldn't mind calling (1,) a simple but I'm not a native English
> speaker so I have no idea wether it sounds ridiculous to English
> ears. If simple is too simple for you just call it simplum or simplon
> or simplex.

Heh heh, simple is weird.

How about this: one-uple, which can be condensed to woople.  :)


From cvanarsdall at mvista.com  Thu Feb  2 15:41:22 2006
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Thu, 02 Feb 2006 12:41:22 -0800
Subject: Thread imbalance
In-Reply-To: <1138912272.382474.13170@g44g2000cwa.googlegroups.com>
References: <1138912272.382474.13170@g44g2000cwa.googlegroups.com>
Message-ID: <43E26E72.70906@mvista.com>

Tuvas wrote:
> I have a program running several threads. One of them must be done
> every (Specified time, usually 1 second). The whole point to having a
> thread is do this. However, I've noticed the following. When there is
> another part of the program that is active, this thread slips into
> disuse, ei, it's only ran about once every 4-5 seconds, or perhaps it
> waits for a lul in the computing process. How can I ensure that this
> does not happen? This thread uses little processing power, so it could
> be set to a high priority, if there is a way to do this. Thanks!
>
>   
I think that might be difficult using python threads simply based on how 
python controls the global interpreter lock.

One suggestion I might have is to have python release the global 
interpreter lock more frequently, you can read about the global 
interpreter lock here:

http://docs.python.org/api/threads.html

You might also be able to use some timer/condition construct in 
combination with this, something like

Thread A:
if watchdogTimer():
  conditionVar.aquire()
  conditionVar.notify(threadB)
  conditionVar.release()

ThreadB:
while(1):
  conditionVar.aquire()
  conditionVar.wait()
  functionToDoSomething()
 
This is pseudo python of course, if you need to know about these objects 
I would suggest consulting the python manual.

-carl

-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From steve at REMOVETHIScyber.com.au  Fri Feb 24 06:07:20 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 24 Feb 2006 22:07:20 +1100
Subject: A C-like if statement
References: <hp-dnY20cusOnGPeRVn-rg@nmt.edu> <dtl04p$5q2$1@reader2.panix.com>
	<sdadnS6nfNnbmmPeRVn-sw@nmt.edu>
	<pan.2006.02.23.22.14.53.56541@REMOVETHIScyber.com.au>
	<1140742149.011750.321530@z34g2000cwc.googlegroups.com>
	<pan.2006.02.24.09.58.32.497698@REMOVETHIScyber.com.au>
	<1140775322.788083.256970@v46g2000cwv.googlegroups.com>
Message-ID: <pan.2006.02.24.11.07.19.764837@REMOVETHIScyber.com.au>

On Fri, 24 Feb 2006 02:02:02 -0800, bonono wrote:

>> >>>> "test".index("a")
>> > Traceback (most recent call last):
>> >   File "<pyshell#0>", line 1, in -toplevel-
>> >     "test".index("a")
>> > ValueError: substring not found
>> >>>> "test".find("a")
>> > -1
>>
>>
>> Did you have a point?
>>
> It was about your side-effect talk, if you failed to see it, that is
> fine.
> 
> BTW, it seems that the term side-effect of function used is a bit
> different from my understanding of how it is in general used in this
> field.

What side effect?

Returning magic values (e.g. -1 to indicate "not found") is not a
side-effect in any terminology I've come across. 

A side-effect would be if s.index(substr) not only returned the index as
promised, but also (say) appended substr to a list somewhere. 

Side-effects aren't always bad (import, for example, does all its work by
side-effect). But they are generally frowned upon, and in functional
languages they are verboten.


-- 
Steven.



From steve at REMOVETHIScyber.com.au  Tue Feb 14 06:03:45 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Tue, 14 Feb 2006 22:03:45 +1100
Subject: listing attributes
References: <1139884643.749492.221140@g43g2000cwa.googlegroups.com>
	<mailman.1876.1139887198.27775.python-list@python.org>
Message-ID: <pan.2006.02.14.11.03.42.625075@REMOVETHIScyber.com.au>

On Mon, 13 Feb 2006 22:18:56 -0500, Peter Hansen wrote:

> Thomas Girod wrote:
>> I'm trying to get a list of attributes from a class. The dir() function
>> seems to be convenient, but unfortunately it lists to much - i don't
>> need the methods, neither the built-in variables.
>> 
>> In fact, all my variables are referencing to objects of the same type.
>> Can anyone suggest me a way to get this list of variables ?
> 
> Does the __dict__ attribute help you?  (Try viewing obj.__dict__ at the 
> interpreter prompt and see if it has what you expect. 
> obj.__dict__.keys() would be just the names of those attributes.)

>>> class Parrot(object):
...     ATTR = None
...     def method(self):
...             return None
...
>>> dir(Parrot)
['ATTR', '__class__', '__delattr__', '__dict__', '__doc__', '__getattribute__', '__hash__', '__init__', '__module__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__str__', '__weakref__', 'method']
>>> Parrot.__dict__.keys()
['__module__', 'ATTR', 'method', '__dict__', '__weakref__', '__doc__']

So I guess the answer to that question is, while __dict__ gives less
information than dir, it still gives too much.

The thing to remember is that methods are attributes too, so it is a
little hard to expect Python to magically know which attributes you want
to see and which you don't. Although, I don't think it is too much to
expect Python to distinguish methods from non-method attributes.

However it is easy to use introspection to get what you need. 

def introspect(obj):
    attributes == dir(obj)
    # get rid of attributes that aren't the right type
    attributes = [a for a in attributes if \
    type(getattr(obj, a)) == type(obj)]
    # or filter any other way you like
    return attributes



-- 
Steven.



From fabioz at esss.com.br  Mon Feb  6 12:45:50 2006
From: fabioz at esss.com.br (Fabio Zadrozny)
Date: Mon, 06 Feb 2006 15:45:50 -0200
Subject: [ANN] PyDev 1.0 released
In-Reply-To: <434E801E.3010702@esss.com.br>
References: <43382E1F.3000600@esss.com.br> <434E801E.3010702@esss.com.br>
Message-ID: <43E78B4E.3030501@esss.com.br>

Hi All,

PyDev - Python IDE (Python Development Enviroment for Eclipse) version 
1.0 has been released.

Check the homepage (http://pydev.sourceforge.net/) for more details.

Details for Release: 1.0

Yeap, that's right, Pydev has reached its 'adulthood', so... enjoy it!

Major highlights:
-----------------------

    * High-speed Debugger (on par with the best debuggers available)
    * Debugger now gets the variables 'on-demand'
    * The variables returned for jython are much more complete
    * Wizard to create new project has option for creating a default 
'src' folder (and add it to the pythonpath).
    * The create new python module and new python package have been 
reviewed (you can still use the regular ones, but the new ones are 
really reccommended -- also it will help in making sure you have your 
pythonpath correctly configured!).
    * Create new source folder option added.
    * Pylint can now give the output to the console (configurable).
    * Pylint 0.9.0 tested
    * Pylint errors now show in the hover
    * The Pydev perspective was changed (so, please, close the current 
and ro-open it)
    * Templates were added for the keywords
    * Keybindings were added to run the current editor as python (F9) or 
as jython (Ctrl+F9). Those are customizable in the 'keys' preferences
    * And many other bug-fixes as usual

Cheers,

Fabio

-- 
Fabio Zadrozny
------------------------------------------------------
Software Developer

ESSS - Engineering Simulation and Scientific Software
www.esss.com.br

PyDev - Python Development Enviroment for Eclipse
pydev.sf.net
pydev.blogspot.com





From johnjsal at NOSPAMgmail.com  Thu Feb 23 16:29:36 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 23 Feb 2006 21:29:36 GMT
Subject: a little more help with python server-side scripting
In-Reply-To: <1140729214.352258.242320@u72g2000cwu.googlegroups.com>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<dSoLf.1663$No6.38996@news.tufts.edu>
	<1140729214.352258.242320@u72g2000cwu.googlegroups.com>
Message-ID: <4PpLf.1664$No6.38743@news.tufts.edu>

Paul Boddie wrote:

> No, it means that you either write Python programs which produce pages
> as output, according to the CGI specification, or that you embed Python
> code inside ASP files, as described in the above document.

> I haven't used ASP, and I've been working hard to remove from my memory
> any trace of similar systems (eg. JSP), but I imagine that if you want
> to include normal Python programs inside ASP files, there may be a way
> of using some kind of "include" directive. Take a look at the above
> document for some ideas.

Why do you mention ASP though? Can't this be done without it?


From peter at engcorp.com  Sun Feb 12 07:57:15 2006
From: peter at engcorp.com (Peter Hansen)
Date: Sun, 12 Feb 2006 07:57:15 -0500
Subject: Single-file executables
In-Reply-To: <KnDHf.173567$65.4790550@twister1.libero.it>
References: <daadb$43ee6b05$4275d90a$28181@FUSE.NET>	<1139702872.177824.323010@g47g2000cwa.googlegroups.com>
	<KnDHf.173567$65.4790550@twister1.libero.it>
Message-ID: <dsnbbd$lma$1@sea.gmane.org>

Giovanni Bajo wrote:
> Ravi Teja wrote:
>>Actually, py2exe (from version 0.6.1) onwards does create single file
>>exes without ANY additional dependencies.
> 
> They still require an external MSVCR71.DLL if made with Python 2.4. PyInstaller
> 1.1 (to be released today) does not have this problem.

Can you describe how they get around that issue?  As far as I know, the 
reason py2exe requires the external DLL is that the licensing of that 
file does not permit completely free redistribution.  Does PyInstaller 
actually bundle it, or does it include an interpreter without any 
dependency on that file?

-Peter



From jstroud at ucla.edu  Tue Feb 28 17:25:27 2006
From: jstroud at ucla.edu (James Stroud)
Date: Tue, 28 Feb 2006 14:25:27 -0800
Subject: type = "instance" instead of "dict"
In-Reply-To: <mailman.2501.1141112430.27775.python-list@python.org>
References: <1141069989.763239.191140@u72g2000cwu.googlegroups.com>	<du0nie$egt$1@daisy.noc.ucla.edu>
	<mailman.2501.1141112430.27775.python-list@python.org>
Message-ID: <du2ikn$spb$1@daisy.noc.ucla.edu>

Fredrik Lundh wrote:
> James Stroud wrote:
> 
> 
>>Perhaps you did not know that you can inheret directly from dict, which
>>is the same as {}. For instance:
>>
>>class Dict({}):
>>   pass

I must have been hallucinating. I swear I did this before and it worked 
just like class Dict(dict). Since it doesn't read as well, I've never 
used it.

> 


From robert.kern at gmail.com  Wed Feb 22 18:42:14 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 22 Feb 2006 17:42:14 -0600
Subject: May i customize basic operator (such as 1==3)?
In-Reply-To: <j2qpv112csno0a243t48aaebcnrnmfb4e1@4ax.com>
References: <mailman.2279.1140579610.27775.python-list@python.org>	<l7onv1t5rpivgrutuhqpahu56ah113b7su@4ax.com>	<mailman.2281.1140582215.27775.python-list@python.org>
	<j2qpv112csno0a243t48aaebcnrnmfb4e1@4ax.com>
Message-ID: <dtissl$u1h$1@sea.gmane.org>

Casey Hawthorne wrote:
> Cannot one subclass the builtin types?

Of course! But that won't change the method on instances of the original builtin
type.

> I have heard, that one should always use objects when programming and
> avoid the builtin types!

That's not particularly good advice for Python.

> Then one is prepared to change objects at will and not rely on any
> special properties of the builtin types!

If you really want to do that, go ahead. I won't stop you. I won't use your
code, either.

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From johnjsal at NOSPAMgmail.com  Tue Feb 14 11:21:58 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 14 Feb 2006 16:21:58 GMT
Subject: how do you pronounce 'tuple'?
In-Reply-To: <vuednQcT5sUEn23eRVn-iA@rcn.net>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
Message-ID: <GsnIf.1615$No6.38197@news.tufts.edu>

::snip a thousand responses::

Well, I'm certainly glad I brought it up.  :)


From martin at v.loewis.de  Wed Feb  8 16:27:20 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 08 Feb 2006 22:27:20 +0100
Subject: Problem with curses and UTF-8
In-Reply-To: <mailman.1617.1139425534.27775.python-list@python.org>
References: <mailman.1566.1139345769.27775.python-list@python.org>	<43E9234B.6030108@v.loewis.de>
	<11ujl0hof3fql62@corp.supernews.com>
	<mailman.1617.1139425534.27775.python-list@python.org>
Message-ID: <43EA6238.6040004@v.loewis.de>

> I'll test it if someone would dumb down "link with ncursesw instead of
> ncurses" a little for me.
> 
> I tried:
> ./configure --with-libs="ncursesw5"
> 
> and it failed saying:
> checking size of wchar_t... configure: error: cannot compute sizeof
> (wchar_t), 77

If that was Python's configure: don't do that. Instead, hack setup.py
to make it change the compiler/linker settings, or even edit the
compiler/linker line manually at first.

Regards.
Martin


From p at ulmcnett.com  Thu Feb 16 09:44:15 2006
From: p at ulmcnett.com (Paul McNett)
Date: Thu, 16 Feb 2006 06:44:15 -0800
Subject: Visual Report Editor
In-Reply-To: <1140094721.295791.319900@g47g2000cwa.googlegroups.com>
References: <1140094721.295791.319900@g47g2000cwa.googlegroups.com>
Message-ID: <43F48FBF.6020203@ulmcnett.com>

Pawel wrote:
> I plan to make Visual Reporting Editior, a new product for
> corporate-class systems. Data will be in XML and in my application,
> designer should be able to make fascinating templates of reports. I
> will use Python and MSVS 2005 Pro. My question is, which libaries will
> be useful in my job. I plan to buy Qt and make visual layer of
> application using Qt. I'm making businessplan soI have to decide which
> tool will be useful. Is Qt best choice, maybe I should buy something
> different?

Before you go to all that work, please take a look at the Dabo Report 
Designer, which uses wxPython for the UI and ReportLab for the PDF 
generation.

There's a 23-minute screencast here which may give you an idea if its 
design is compatible with yours:

http://dabodev.com/documentation

It isn't complete and I could certainly use help making it so.

-- 
Paul




From wmmeyer at gmail.com  Tue Feb 28 13:04:48 2006
From: wmmeyer at gmail.com (William Meyer)
Date: Tue, 28 Feb 2006 18:04:48 +0000 (UTC)
Subject: comple list slices
References: <mailman.2516.1141136527.27775.python-list@python.org>
	<1141143200.110570.51680@u72g2000cwu.googlegroups.com>
	<mailman.2519.1141145363.27775.python-list@python.org>
	<1141146626.762530.282660@v46g2000cwv.googlegroups.com>
Message-ID: <loom.20060228T184658-818@post.gmane.org>

 <johnzenger <at> gmail.com> writes:

> Although I don't know if this is faster or more efficient than your
> current solution, it does look cooler:
> 
> def grouprows(inrows):
>     rows = []
>     rows[:] = inrows  #  makes a copy because we're going to be
> deleting
>     while len(rows) > 0:
>         rowspan = rows[0]["rowspan"]
>         yield rows[0:rowspan]  # "returns" this value, but control flow
> unaffected
>         del rows[0:rowspan]  # remove what we just returned from the
> list, and loop
> 
> grouper = grouprows(copyrows)
> print [x for x in grouper]

wow, i think this is much better then my solution. And you can easily call it
for subgroups:

grouper = grouprows(rows)
for x in grouper
    grouperTwo = grouprows(x)
    for y in grouperTwo

Do i need to copy the list in the iterator? (if I am not planning on using rows
again) The reference count for the list members will get bumped on yield right? 




From jjl at pobox.com  Sun Feb 12 19:33:56 2006
From: jjl at pobox.com (John J. Lee)
Date: Mon, 13 Feb 2006 00:33:56 GMT
Subject: Yet another GUI toolkit question...
References: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
	<m2d5huwof8.fsf@unique.fqdn>
	<43ED6990.1020707@wordtech-software.com>
Message-ID: <87u0b45c72.fsf@pobox.com>

Kevin Walzer <sw at wordtech-software.com> writes:
[...]
> Commercial Qt is a little out of my price range.

Commercial *PyQt* (including a license for Qt for use only with PyQt)
is $400 (USD) per developer (plus an extra $300/year if you want
upgrades).  That's compared to Qt license for use *with C++* varying
from $1690 to $6260.  So PyQt is 4-15 times cheaper than old-fashioned
C++ Qt!

http://www.thekompany.com/products/blackadder/


Apparently you get mxODBC in that price, too.  And the Blackadder
development environment itself, of course, though personally I
wouldn't use it.

PyQt 4 now seems to exist, though not as a stable release yet, so I
imagine it'll be a bit longer untill there's a release of Blackadder
that supports Qt 4.  I recall the PyQt 2 --> PyQt 3 upgrade as being
fairly painless (in terms of code changes), though.


John


From scott.daniels at acm.org  Fri Feb 10 18:54:26 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Fri, 10 Feb 2006 15:54:26 -0800
Subject: is there a better way?
In-Reply-To: <43ece865$1@nntp0.pdx.net>
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
	<43ece865$1@nntp0.pdx.net>
Message-ID: <43ed266c$1@nntp0.pdx.net>

Scott David Daniels wrote:
> markscala at gmail.com wrote:
>> Problem:
>>
>> You have a list of unknown length, such as this: list =
>> [X,X,X,O,O,O,O].  You want to extract all and only the X's.  You know
>> the X's are all up front and you know that the item after the last X is
>> an O, or that the list ends with an X.  There are never O's between
>> X's.
>>
>> I have been using something like this:
>> while list[0] != O:
>>     storage.append(list[0])
>>     list.pop(0)
>>     if len(list) == 0:
>>         break
>> But this seems ugly to me, and using "while" give me the heebies.  Is
>> there a better approach?
>>
> 
> Your names could be better as someone mentioned.
>     ex, oh = 7, 13   # for example
>     data = [ex, ex, ex, oh, oh, oh, oh]
> If you need a list distinct from the original:
>     try:
>         result = data[: data.index(oh)]
>     except ValueError:
>         result = list(data)
> 
> Or you could simply:
>     try:
>         data = data[: data.index(oh)]
>     except ValueError:
>         pass
> and data will be either the sublist you want or the original list.

I forgot the obvious:

     result = data.count(ex) * [ex]

-- 
-Scott David Daniels
scott.daniels at acm.org


From steven.bethard at gmail.com  Mon Feb 20 11:44:58 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 20 Feb 2006 09:44:58 -0700
Subject: Processing text using python
In-Reply-To: <1140453379.593658.160770@g44g2000cwa.googlegroups.com>
References: <1140451760.998278.90430@g43g2000cwa.googlegroups.com>
	<1140453379.593658.160770@g44g2000cwa.googlegroups.com>
Message-ID: <7umdnQWGhLeYb2TenZ2dnUVZ_tKdnZ2d@comcast.com>

danmcleran at yahoo.com wrote:
> I think this is what you want:
> 
> file = open(r'c:/test.txt','r')
> 
> c = file.read(3)
> while c:
>     print c
>     c = file.read(3)
> 
> file.close();


Or:

     def read3():
         return file.read(3)
     for chars in iter(read3, ''):
         ... do something with chars ...

STeVe


From ziga.seilnacht at gmail.com  Thu Feb  9 18:00:48 2006
From: ziga.seilnacht at gmail.com (Ziga Seilnacht)
Date: 9 Feb 2006 15:00:48 -0800
Subject: representing physical units
References: <1139518037.704683.99910@z14g2000cwz.googlegroups.com>
Message-ID: <1139526048.235046.154510@g47g2000cwa.googlegroups.com>

Russ wrote:
> I know that python packages are available for representing physical
> units, but I am getting frustrated trying to find them and determine
> which is the best.

> Where can I find a good package that does this? Thanks.

Unum is a special package just for this purpose:
http://home.tiscali.be/be052320/Unum.html

ScientificPython http://starship.python.net/~hinsen/ScientificPython/
has a simmilar module, but it depends on Numeric package.

Ziga



From mac at calmar.ws  Sat Feb 18 08:37:18 2006
From: mac at calmar.ws (calmar)
Date: Sat, 18 Feb 2006 14:37:18 +0100
Subject: general coding issues - coding style...
Message-ID: <slrndve8oe.5jb.mac@news.calmar.ws>

Hi all,

since I'm just a 'handicraft'/beginner or so,

could anybody provide me with some (rough) hints, about how to enhance the code
here:

http://calmar.ws/tmp/cal.html

Cheers and thanks a lot
calmar


-- 
  calmar

          (o_  It rocks: LINUX + Command-Line-Interface
          //\
          V_/_                     http://www.calmar.ws


From spwpreston at gmail.com  Fri Feb 10 19:10:16 2006
From: spwpreston at gmail.com (S Borg)
Date: 10 Feb 2006 16:10:16 -0800
Subject: absolute removal of '\n' and the like
In-Reply-To: <mailman.1729.1139614515.27775.python-list@python.org>
References: <1139613718.688010.216370@z14g2000cwz.googlegroups.com>
	<mailman.1729.1139614515.27775.python-list@python.org>
Message-ID: <1139616616.330819.93640@o13g2000cwo.googlegroups.com>



Russ,

 Thanks a ton for ending a 3 day headache.

S



From n.estner at gmx.de  Fri Feb  3 18:48:09 2006
From: n.estner at gmx.de (n.estner at gmx.de)
Date: 3 Feb 2006 15:48:09 -0800
Subject: Another try at Python's selfishness
In-Reply-To: <donn-442117.10474803022006@gnus01.u.washington.edu>
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<donn-C3B8DF.14535302022006@gnus01.u.washington.edu>
	<1138926741.052843.169270@z14g2000cwz.googlegroups.com>
	<donn-AC8404.17325802022006@gnus01.u.washington.edu>
	<1138965780.698016.95590@o13g2000cwo.googlegroups.com>
	<donn-442117.10474803022006@gnus01.u.washington.edu>
Message-ID: <1139010489.553408.250770@g44g2000cwa.googlegroups.com>

> Still see no problem.  Of course, it goes without saying that
> Python 2.4 doesn't work this way, but given that it's theoretically
> possible for f(a) to be resolved similarly to a.f, then I really
> do not see what you're seeing here.  The kwargs parameter appears
> irrelevant from where I'm sitting.

Then either you didn't understand my answers, or I didn't understand
your idea. Could you summarize how exactly "f(x,y=z)" should be
resolved, i.e. where it should look for "f"?



From larry.bates at websafe.com  Fri Feb  3 18:54:19 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Fri, 03 Feb 2006 17:54:19 -0600
Subject: py2exe question
In-Reply-To: <1138982183.590870.52280@f14g2000cwb.googlegroups.com>
References: <1138982183.590870.52280@f14g2000cwb.googlegroups.com>
Message-ID: <43E3ED2B.1070103@websafe.com>

mitsura at skynet.be wrote:
> Hi,
> 
> I just installed py2exe to create a binary of my Python script.
> However, py2exe does not seem to create a binary from my .py script.
> This is what I have done:
> I create a setup.py script:
> "
> # setup.py
> from distutils.core import setup
> import py2exe
> 
> setup(name="APP1", scripts=["C:\\Python24\\_APP1.py"],)
> "
> 
> I then ran "python setup.py py2exe"
> I see a lot of stuff scrolling on the screen. A 'built' directory is
> created. At the end I get a message saying that I may or may not need
> to include some DLL (all windows system DLLs). and that's it. No error
> message but also no binary.
> 
> When I remove 'scripts=["C:\\Python24\\_APP1.py"]' from the setup.py
> file, I  get exactly the same result. The same output, no error, no
> binary.
> 
> Any idea what I am doing wrong here? Where should the compiled binary
> go?
> 
> Any help much appreciated.
> 
> Kris
> 
The .exe, library and .pyd files are written to /dist subdirectory
not /built (sic).

You setup file should look something like:

The .exe, library and .pyd files are written to /dist subdirectory
not /built (sic).

from distutils.core import setup
import py2exe
setup(name="APPI",
      windows=[{"script":"_APPI.py"}],
      # or console= for console app
      version="1.50",
      options={"py2exe": {"compressed": 1,
                          "optimize": 2,
                          "bundle_files":1}},
     )

If that doesn't help, you may want to post to the py2exe
specific newsgroup at gmain.comp.python.py2exe.

-Larry Bates



From s99999999s2003 at yahoo.com  Mon Feb 13 05:41:26 2006
From: s99999999s2003 at yahoo.com (s99999999s2003 at yahoo.com)
Date: 13 Feb 2006 02:41:26 -0800
Subject: Question regarding mkdir of ftputil
In-Reply-To: <1139824907.881526.5210@f14g2000cwb.googlegroups.com>
References: <1139824907.881526.5210@f14g2000cwb.googlegroups.com>
Message-ID: <1139827286.229506.168980@f14g2000cwb.googlegroups.com>

Problem solved. Used try and except method



From Allerdyce.John at gmail.com  Sun Feb 26 14:43:09 2006
From: Allerdyce.John at gmail.com (Allerdyce.John at gmail.com)
Date: 26 Feb 2006 11:43:09 -0800
Subject: How to use python regular expression to substitute string value
In-Reply-To: <87lkvy7xxi.fsf@a11a.mannikko1.ton.tut.fi>
References: <1140978932.892295.322370@z34g2000cwc.googlegroups.com>
	<87lkvy7xxi.fsf@a11a.mannikko1.ton.tut.fi>
Message-ID: <1140982989.299461.52740@i40g2000cwc.googlegroups.com>

When I try your idea, I have this error

    x, y, width, height = re.findall(pattern, str)[0]
IndexError: list index out of range

How can I use findall to handle error case? i.e. what if there is no
match? how can I handle it gracefully?



From ema32 at msn.com  Tue Feb  7 05:04:35 2006
From: ema32 at msn.com (ema32 at msn.com)
Date: 07 Feb 2006 10:04:35 GMT
Subject: Great Job Board
Message-ID: <43e870b3$1$5507$bb8e7a08@news.usenetcompany.com>

--_NextPart_00009763-00000843-0CE6F984-7AA4
Content-Type: text/plain
Content-Transfer-Encoding: 7bit

There is a great job board located at the employment section of
http://www.4charlesson.com . So pass it on to anyone looking for a job.
--_NextPart_00009763-00000843-0CE6F984-7AA4--


From apgwoz at gmail.com  Tue Feb  7 13:21:16 2006
From: apgwoz at gmail.com (Andrew Gwozdziewycz)
Date: Tue, 7 Feb 2006 13:21:16 -0500
Subject: Natural Language Date Processing.
In-Reply-To: <43E8D051.1080801@adrhinum.de>
References: <mailman.1544.1139316354.27775.python-list@python.org>
	<43E8D051.1080801@adrhinum.de>
Message-ID: <8ba244fb0602071021k17b3a222pfc5a2c799c4d5034@mail.gmail.com>

> You may take a look at http://labix.org/python-dateutil
> Have fun
> Michael
>

Looks like it does a good job parsing dates, but doesn't seem to do
english dates. I found a javascript implementation of a few functions
that will probably be relatively easy to port to python. Whether or
not it'll perform well is another story... Thanks for the help.

--
Andrew Gwozdziewycz <apgwoz at gmail.com>
http://ihadagreatview.org
http://plasticandroid.org


From steve at holdenweb.com  Tue Feb 21 14:58:44 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 21 Feb 2006 14:58:44 -0500
Subject: No
In-Reply-To: <dtfhv7$css$1@sea.gmane.org>
References: <1140534490.873612.64280@g47g2000cwa.googlegroups.com><mailman.2245.1140537111.27775.python-list@python.org>	<1140539240.807314.283280@g43g2000cwa.googlegroups.com>
	<dtfhv7$css$1@sea.gmane.org>
Message-ID: <dtfrdl$eju$2@sea.gmane.org>

Fredrik Lundh wrote:
> "Gaz" wrote:
> 
> 
>>OSError: [Errno 2] No such file or directory: 'c:/'
>>      args = (2, 'No such file or directory')
>>      errno = 2
>>      filename = 'c:/'
>>      strerror = 'No such file or directory'
>>
>>Crazy... and if i use c:\, i get a 500 error.
> 
> 
> that's probably because "c:\" is a syntax error:
> 
> 
>>>>"c:\"
> 
>   File "<stdin>", line 1
>     "c:\"
>         ^
> SyntaxError: EOL while scanning single-quoted string
> 
> but since you're getting a "500 error" instead, it sure sounds like you
> forgot to tell us *how* you're running your scripts... (server, platform,
> python version, etc).
> 
The 500 error's almost certainly because the script is failing before it 
emits anything on standard output (I'm presuming that the syntax error 
will appear on standard error, without having checked ...).

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From steve at REMOVETHIScyber.com.au  Sun Feb 19 17:28:00 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Mon, 20 Feb 2006 09:28:00 +1100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<1140382936.808627.40300@o13g2000cwo.googlegroups.com>
Message-ID: <pan.2006.02.19.22.27.59.152474@REMOVETHIScyber.com.au>

On Sun, 19 Feb 2006 13:02:16 -0800, Paul Boddie wrote:

> Torsten Bronger wrote:
>> Hall?chen!
>>
>> Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> writes:
>> >
>> > Ok, then what do you think happens to 'machine' code ?
>> >
>> > "interpreted" usually means "no compilation, all parsing etc
>> > redone at each execution", which is not the case with a
>> > bytecode/vm based implementation.
> 
> Such criteria sound more like those which would distinguish interactive
> languages from others.

How can that be? Python is interactive, and yet it has a bytecode/vm
implementation.

And I'm just waiting for somebody to mention Forth, which completely
breaks down the barriers between compilation and interpretation. In a
world of virtual machines, bytecode compilers, CPUs which emulate other
CPUs using embedded software, and Forth, I would have thought that it was
as obvious as the Sun in the sky that compiled versus interpreted is a
false dichotomy.



>> That sounds like an implementation feature rather than a language
>> feature.  Besides, it's not a very sensible distinction in my opinion.
>> Much better is to think about the structure of the interpreting
>> machine.
> 
> And it's even better to think about the nature of the machine...

Is it? Why? Do you particularly know what happens when your machine code
hits the CPU?


>> I'm not a CS person (only a physicist) but if you *need* a bytecode
>> interpreter on top of the CPU interpretation, it's an interpreted
>> language to me.
> 
> Yet one could potentially have that bytecode interpreter in hardware.

Not potentially, in actuality. I know of only one example, and it
wasn't commercially success, but in 1993 IBM developed a version of
the PowerPC RISC chip that had support for the Intel x86 instruction set.

What has been done once can be done again.

[snip]

> I'm not sure why people get all defensive about Python's
> interpreted/scripting designation or about the details of the CPython
> implementation, especially considering that the virtual machine
> technology in use has been around for a decade and a half, and that
> various projects have been experimenting with alternatives.

I can't speak for others, but for me it is because generally the people
who are the quickest to insist that Python is interpreted appear to mean
it as a put-down. I never hear "Python has the rapid development and
flexibility that only an interpreted language can give", it is always "Of
course Python is slow, it is interpreted, what do you expect?".

Even if they themselves are perfectly aware of the subtle shades of
modern language design, and that interpretation does not mean that every
line of code is parsed repeatedly as it is run, it seems to me that very
often they don't mind one bit if others, less informed than them, come
away with that impression.

Let's be frank: "interpreted language" has negative connotations which may
have been valid in the 1960s and perhaps even the 1970s, but are no longer
automatically valid. Nevertheless, those connotations stick around,
generally amongst the less knowledgeable. That hurts Python's commercial
success, and Python's commercial success is vital for anyone who wishes to
get paid to program in Python. 


-- 
Steven.



From could.net at gmail.com  Wed Feb  8 22:31:23 2006
From: could.net at gmail.com (Frank Potter)
Date: Thu, 9 Feb 2006 11:31:23 +0800
Subject: removing characters before writing to file
In-Reply-To: <1139452501.421306.44080@f14g2000cwb.googlegroups.com>
References: <1139452501.421306.44080@f14g2000cwb.googlegroups.com>
Message-ID: <311b5ce10602081931p4ca8b411g48aa7ea3a6761724@mail.gmail.com>

r=re.compile(r"(\(')|( '\))|'")
print r.sub('',str(output))

On 8 Feb 2006 18:35:01 -0800, eight02645999 at yahoo.com <
eight02645999 at yahoo.com> wrote:
>
> hi
> i have some output that returns a lines of tuples egtr
>
> ('sometext1', 1421248118, 1, 'P ')
> ('sometext2', 1421248338, 2, 'S ')
> and so on
> ....
>
> I tried this
> re.sub(r" '() ",'',str(output)) but it only get rid of the ' and not
> the braces. I need to write the output to a file such that
>
> sometext1, 1421248118, 1, P
> sometext2, 1421248338, 2, S
>
> I also tried escaping , re.sub(r" '\(\) ",'',str(output)) but also did
> not work
> How can i get rid of the braces before writing to file? thanks
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
-------------- next part --------------
An HTML attachment was scrubbed...
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From johnjsal at NOSPAMgmail.com  Mon Feb 13 16:32:32 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 13 Feb 2006 21:32:32 GMT
Subject: cyclic data structures
In-Reply-To: <mailman.1860.1139865054.27775.python-list@python.org>
References: <Nc6If.1604$No6.38177@news.tufts.edu>	<mailman.1858.1139863851.27775.python-list@python.org>	<fu6If.1607$No6.37915@news.tufts.edu>
	<mailman.1860.1139865054.27775.python-list@python.org>
Message-ID: <QV6If.1609$No6.38089@news.tufts.edu>

Carsten Haese wrote:

> L is [1,2] before the append. After the append, L is [1,2,L], which is
> [1,2,[1,2,L]], which is [1,2,[1,2,[1,2,L]]] etc into infinity. L
> literally contains itself after the append.

Ah, this perfectly explains it now! I guess I was dancing around this 
fact, but now that you've typed it out, I see that L actually changed in 
place!

Thanks guys!


From sybrenUSE at YOURthirdtower.com.imagination  Wed Feb 22 11:39:08 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Wed, 22 Feb 2006 17:39:08 +0100
Subject: a little more help with python server-side scripting
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<Lc0Lf.1652$No6.38850@news.tufts.edu>
Message-ID: <slrndvp4tc.9ng.sybrenUSE@schuimige.unrealtower.org>

John Salerno enlightened us with:
> What I had asked was if I could just embed Python code within my
> HTML files, like you do with PHP, but they didn't address that yet.

Check out PSP.

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From frank at niessink.com  Tue Feb 28 12:44:43 2006
From: frank at niessink.com (Frank Niessink)
Date: Tue, 28 Feb 2006 18:44:43 +0100
Subject: minimize a program into an icon on the taskbar.
In-Reply-To: <47a726d60602270326i2df525d3sd4a04b74aa447a16@mail.gmail.com>
References: <47a726d60602270326i2df525d3sd4a04b74aa447a16@mail.gmail.com>
Message-ID: <44048C0B.8000807@niessink.com>

Rajesh Sathyamoorthy:
> Hi,
> 
> I would know how to minimize a program (wxpython app) into an icon on 
> the taskbar on windows (the one at the side near the clock, i can't 
> remember what is it called.)
> 
> Is it easy to be done? Is there a way to do the same thing on Linux?

Did you look into wx.TaskBarIcon?

Cheers, Frank




From blair.houghton at gmail.com  Sun Feb  5 03:48:43 2006
From: blair.houghton at gmail.com (Blair P. Houghton)
Date: 5 Feb 2006 00:48:43 -0800
Subject: OO conventions
In-Reply-To: <1ha8507.1lk6sxl1859falN%aleaxit@yahoo.com>
References: <mailman.1334.1138833641.27775.python-list@python.org>
	<43E13F39.2070709@freenet.de>
	<1138928426.867847.66790@g44g2000cwa.googlegroups.com>
	<43e36755$0$26603$636a55ce@news.free.fr>
	<1139038279.801416.8680@g14g2000cwa.googlegroups.com>
	<1ha8507.1lk6sxl1859falN%aleaxit@yahoo.com>
Message-ID: <1139129323.912400.38300@g43g2000cwa.googlegroups.com>


Alex Martelli wrote:
> As you see, static methods have a small extra lookup cost (a couple
> hundred nanoseconds on my oldish laptop);

I would've expected the opposite effect...I guess the runtime
considers instances more active than the static portion of
a class.

> "Premature
> optimization is the root of all evil in programming", as Knuth wrote
> quoting Hoare -- and anybody who's read Knuth's work knows he is
> anything BUT indifferent to real optimization; the key is avoiding that
> "premature" part!-)

Apropos of which someone mentioned in a thread on Slashdot
today about writing an entire program's code in Python first and
then optimizing portions to C or C++ only as performance warrants.

Seems like a good idea.  I've noticed Python is a lot easier to
get up-and-running with, even if you're as unfamiliar with it as
I am, compared to the other two.

--Blair



From greg.kujawa at gmail.com  Fri Feb 24 15:05:17 2006
From: greg.kujawa at gmail.com (gregarican)
Date: 24 Feb 2006 12:05:17 -0800
Subject: PyQt - multiple window instances?
In-Reply-To: <4696l4F9tk48U1@uni-berlin.de>
References: <1140808598.748272.240790@i39g2000cwa.googlegroups.com>
	<4694jqFa1ahgU1@uni-berlin.de>
	<1140809670.338611.258120@i40g2000cwc.googlegroups.com>
	<4696l4F9tk48U1@uni-berlin.de>
Message-ID: <1140811517.025541.113770@t39g2000cwt.googlegroups.com>

Diez B. Roggisch wrote:

> > The window isn't being created as a new class instance or anything.
>
>
> Yes it is. QWidget() creates a new instance of QWidget.
>
>  > The
>
>
>
> > main class is the application main window as a whole and this
> > particular window is just part of that class. I have typed data into
> > the window, then tried to open up a new window. But when I do the
> > window where I have typed data disappears and is replaced by a new
> > window that's blank. What's the easiest way to keep a reference to the
> > old window?
>
>
> By putting it into a list for example?
> 
> Diez 

Perfect! Thanks for the tip. That worked perfectly.



From deets at nospam.web.de  Fri Feb 17 11:18:22 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 17 Feb 2006 17:18:22 +0100
Subject: Checkbuttons in a Text widget
References: <1140190108.192983.287630@g14g2000cwa.googlegroups.com>
Message-ID: <45mbclF7eburU2@uni-berlin.de>

Lou G wrote:

> I'm trying to show a number of Checkbuttons (each with associated text
> based on a list of names) inside a y-scrollable Text widget like so:
> 
> [ ] Bob
> [ ] Carol
> [ ] Ted
> [ ] Alice
> etc.
> etc.
> 
> There may be quite a few (as many as 100 or so). I'm uncertain as to
> the correct way to get these into the Text widget. I've tried
> text.insert and it doesn't seem to do the job. Help?

Maybe you can generate HTML and render that using a embedded browser? This
of course depends heavily on your system.

Diez


From email at christoph-haas.de  Sun Feb 26 16:55:57 2006
From: email at christoph-haas.de (Christoph Haas)
Date: Sun, 26 Feb 2006 22:55:57 +0100
Subject: python newbie question
In-Reply-To: <1140990272.596746.150530@e56g2000cwe.googlegroups.com>
References: <1140990272.596746.150530@e56g2000cwe.googlegroups.com>
Message-ID: <200602262255.57523.email@christoph-haas.de>

On Sunday 26 February 2006 22:44, ken.carlino at gmail.com wrote:
> I am new to python, can you please tell me how can I convert my python
> script into an executable on linux?
> i.e. instead of typing 'python myscript.py abc', I just need to do
> 'myscript.py abc'?

Use the shebang syntax. Use this as a first line in your script:

#!/usr/bin/python

Some people rather prefer an "env" approach.

Remember to make your script executable (chmod +x scriptname).

> and how can I get the input argument from my script , in my example,
> how can I read 'abc'?

import sys
print sys.argv[1]

Kindly
 Christoph
-- 
~
~
".signature" [Modified] 1 line --100%--                1,48         All


From singletoned at gmail.com  Tue Feb  7 17:07:53 2006
From: singletoned at gmail.com (Ed Singleton)
Date: Tue, 7 Feb 2006 22:07:53 +0000
Subject: Question about idioms for clearing a list
In-Reply-To: <1139324897.738125.278520@g43g2000cwa.googlegroups.com>
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<ds83kd$98m$1@sea.gmane.org> <43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>
	<mailman.1546.1139320907.27775.python-list@python.org>
	<1139324897.738125.278520@g43g2000cwa.googlegroups.com>
Message-ID: <34bb7f5b0602071407w32c750cer@mail.gmail.com>

On 7 Feb 2006 07:08:17 -0800, Raymond Hettinger <python at rcn.com> wrote:
> > As a general rule of thumb, I would say that if a person is struggling
> > with a language, it is primarily a problem with the language, and than
> > problem with the documentation, and lastly a problem with the person.
>
> I would swap the first two.  No language has yet been invented
> (including HTML and LOGO) that someone doesn't struggle with.  In
> contrast, no documentation has ever been written that couldn't be
> improved.

(I should clarify that by documentation, I mean external documentation
rather than self-documentation features)

Given the choice of having a language that is hard to use but has good
documentation or one that is easy to use but has bad documentation,
which would you go for?

If you could write the perfect language, would it be so easy to use
(including self-documentation) that no one ever needed to look things
up in external documentation, or would it have such good documentation
that you could always find what you needed in external documentation?

Documentation is there to cover up the cracks in the none-obvious (or
confusing) parts of the language.  Python is starting to show that one
day anything but the most perfunctory documentation may one day become
unnecessary.

Ed


From c_shyone at yahoo.com  Fri Feb 17 11:07:27 2006
From: c_shyone at yahoo.com (Farel)
Date: 17 Feb 2006 08:07:27 -0800
Subject: Which is faster? (if not b in m) or (if m.count(b) > 0)
In-Reply-To: <mailman.1938.1139998694.27775.python-list@python.org>
References: <1139976842.179801.285400@z14g2000cwz.googlegroups.com>
	<mailman.1938.1139998694.27775.python-list@python.org>
Message-ID: <1140192447.839243.167130@o13g2000cwo.googlegroups.com>

Great observations... Changing for lists to tuples would make sorting
unnecessary...



From crutcher at gmail.com  Sun Feb 26 15:48:47 2006
From: crutcher at gmail.com (Crutcher)
Date: 26 Feb 2006 12:48:47 -0800
Subject: Is Python a Zen language?
In-Reply-To: <1140963005.123017.90890@t39g2000cwt.googlegroups.com>
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
	<1140931766.200951.321320@t39g2000cwt.googlegroups.com>
	<1140963005.123017.90890@t39g2000cwt.googlegroups.com>
Message-ID: <1140986927.452802.241330@e56g2000cwe.googlegroups.com>

> My point is simply that, for some languages L,
> "Zen and the art of L" or "The Tao of L" are plausible
> titles ("Zen and the Art of Lisp Programming" would be plausible) but
> for some languages they wouldn't ("The Tao of Fortran" ?)
> Do you disagree?

No, I don't disagree that people do this. The history of "Zen and the
Art of X" dates from "Zen and the Art of Motorcycle Repair", which is
actually about Zen and Motorcycles. Really. It is also a cool title,
and people have used it, and used it, and used it. I suspect that the
rash of "The Tao of X" is based upon "The Tao of Pooh" (which is
actually about Tao and Pooh, the bear), but I'm not as comfortable
making the claim that these titles are all descendent.

> I have no doubt that this usage of terms from Eastern Mysticism must be
> annoying to someone such as yourself who has actually studied it, but
> the genie can't be put back into the bottle. It is no longer really
> plausible to be a purist regarding words like "Zen" or "Tao" - it just
> makes you appear pedantic.

First, my exposure to estern mysticism is limited (probably less than
100 hours). I think I made that clear in my post. Second, when you ask
"Is X a Zen Language", you are asking for a pedantic discussion.

If you seek clarity in language classification, you should not start
the discussion by hijacking terms which are not understood. Adding
mystery to a difficult discussion does not answer any questions, it
just makes the discussion seem cooler.

My central thesis: you are using a poor understanding of language to
classify languages into things you understand (tool languages) and
things which _you_ find 'deep' (and difficult to learn), which you call
'Zen languages'. This is ridiculous, e.g. deserving of ridicule. I am
being mean because you are engaging in mental masturbation in public,
and I'm worried that you might convince someone.



From psavo at iki.fi  Sun Feb 26 16:23:07 2006
From: psavo at iki.fi (Pasi Savolainen)
Date: Sun, 26 Feb 2006 23:23:07 +0200
Subject: How to use python regular expression to substitute string value
References: <1140978932.892295.322370@z34g2000cwc.googlegroups.com>
	<87lkvy7xxi.fsf@a11a.mannikko1.ton.tut.fi>
	<1140982989.299461.52740@i40g2000cwc.googlegroups.com>
Message-ID: <87hd6l95ms.fsf@a11a.mannikko1.ton.tut.fi>

Allerdyce.John at gmail.com writes:

> When I try your idea, I have this error
>
>     x, y, width, height = re.findall(pattern, str)[0]
> IndexError: list index out of range
>
> How can I use findall to handle error case? i.e. what if there is no
> match? how can I handle it gracefully?

This is explained in python docs, and do try them in interactive python,
for example IPython is great for this stuff.

- -
ipython ->

In [1]:import re 

In [2]:line = "foobar"

In [3]:re.findall ("baz", line)
Out[3]:[]

In [4]:re.findall ("o", line)
Out[4]:['o', 'o']
- -

So you can do:
- -
match = re.findall(pattern, str)
if match:
   x, y, width, height = match[0]
   ...
else:
   # no match
- -



-- 
   Psi -- <http://www.iki.fi/pasi.savolainen>


From mahs at telcopartners.com  Wed Feb  8 19:52:15 2006
From: mahs at telcopartners.com (Michael Spencer)
Date: Wed, 08 Feb 2006 16:52:15 -0800
Subject: Pulling all n-sized combinations from a list
In-Reply-To: <1139440532.158500.16930@z14g2000cwz.googlegroups.com>
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>	<7x7j85czje.fsf@ruckus.brouhaha.com>	<1139436433.439927.175100@g47g2000cwa.googlegroups.com>	<7xr76dwiy3.fsf@ruckus.brouhaha.com>
	<1139440532.158500.16930@z14g2000cwz.googlegroups.com>
Message-ID: <dse3mj$pnq$1@sea.gmane.org>

Swroteb wrote:
> Paul Rubin wrote:
>> I think the natural approach is to make a generator that yields a
>> 5-tuple for each combination, and then have your application iterate
>> over that generator.  Here's my version:
>>
>>     def comb(x,n):
>>         """Generate combinations of n items from list x"""
>>         if n==0:
>>             yield []
>>             return
>>         for i in xrange(len(x)-n+1):
>>             for r in comb(x[i+1:], n-1):
>>                 yield [x[i]] + r
>>
>>     for c in comb([1,2,3,4,5], 3):
>>         print c
>>
>> The output is:
>>     >>>
>>     [1, 2, 3]
>>     [1, 2, 4]
>>     [1, 2, 5]
>>     [1, 3, 4]
>>     [1, 3, 5]
>>     [1, 4, 5]
>>     [2, 3, 4]
>>     [2, 3, 5]
>>     [2, 4, 5]
>>     [3, 4, 5]
>>     >>>
> 
> Ah, this definitely seems to work!  It's a lot nicer in appearance than
> my previous code, that's for sure.  It actually runs in approximately
> the same amount of time though.  So, using your comb method, I have the
> following code now:
> 
>         myCombinations = comb(myList, 5)
>         for a, b, c, d, e in myCombinations:
>             # my code
> 
> myList is 48 elements in size, so I'm going to get 1712304
> combinations.  From what I can tell, my speed problems aren't in the
> list generation anymore.
> 
> Thanks for the assistance, Paul!  I appreciate it.  :)
> 
If you're concerned about speed, and don't mind lack of flexibility, spelling 
out the iteration within your function is much faster:

def comb(seq):
     indices = range(len(seq))
     for ia in indices:
         a = seq[ia]
         for ib in indices[ia+1:]:
             b = seq[ib]
             for ic in indices[ib+1:]:
                 c = seq[ic]
                 for id in indices[ic+1:]:
                     d = seq[id]
                     for ie in indices[id+1:]:
                         e = seq[ie]

This is roughly 30 times faster on my box than the general solution above

Michael





From deets at nospam.web.de  Mon Feb 13 11:43:35 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 13 Feb 2006 17:43:35 +0100
Subject: Image to numeric array
References: <mailman.1831.1139841904.27775.python-list@python.org>
	<45bmv4F5rjf2U1@uni-berlin.de>
	<dsqb2i$19p$1@newsreader3.netcologne.de>
Message-ID: <45bratF5up9fU1@uni-berlin.de>

> Is there a difference between the 'Numeric' and 'numeric' module?
> I have on my system only Numeric... And this has no function like
> 'from_image'.

I actually didn't check that - I just wanted to point the OP to the
numeric-module(s) available, as he suggested that 

>The usual way of doing such things is to use PIL (Python Image Library) 
>to load the image from file, then export it from PIL to a Python string 
>in order to import from this string to an array of the targeted 
>numerical module.

I'd go for the getdata() method instead.

>Really curious if there is a direct way in any of the numerical 
>packages, as it would save the time and effort of unnecessary 
>conversions from PIL, ImageMagick or from other image libraries.

Whatever module is capable of converting needs to know how to read images -
either by itself, or by means of another module. 


I know for sure that pygame supports retrieving pixel-data as array.

Diez


From fuzzyman at gmail.com  Mon Feb  6 11:08:27 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 6 Feb 2006 08:08:27 -0800
Subject: read file problem
In-Reply-To: <1139239797.811569.253010@g43g2000cwa.googlegroups.com>
References: <1139239797.811569.253010@g43g2000cwa.googlegroups.com>
Message-ID: <1139242107.412367.86630@g43g2000cwa.googlegroups.com>


Ernesto wrote:
> I'm just want to read in the contents of a (text) file.  The text file
> is filled with semiColon delimited floating point strings...
>
> 0.456;1.265;99.742;...
>
> For some reason, I can't get the contents back when I call file.read()
>  Here's my code.
>
> filePath = "C:\\folder\\myFile.txt
> fileHandle = open(filePath, 'r').read();
> print fileHandle.read()
>
> # This prints nothing when it should print the above values....  Thanks
> for the help

Try adding a 'print fileHandle' in there...

That line should be :

fileHandle = open(filePath, 'r')

The '.read()' part returns the full file... so further reads have no
effect.

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml



From fuzzyman at gmail.com  Fri Feb  3 04:31:11 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 3 Feb 2006 01:31:11 -0800
Subject: Movable Python 1.0.0 for Python 2.3 & 2.4
Message-ID: <1138959071.311807.134640@z14g2000cwz.googlegroups.com>

It's finally happened, `Movable Python
<http://www.voidspace.org.uk/python/movpy/>`_ is finally released.

Versions for Python 2.3 & 2.4 are available from `The Movable Python
Shop <http://voidspace.tradebit.com/groups.php>`_.

The cost is ?5 per distribution, payment by PayPal. ?1 from every
distribution goes to support the development of `SPE
<http://pythonide.stani.be/>`_, the Python IDE.

This gives you free support (via the `Movable Python Mailing List
<http://groups.google.com/group/movpy>`_), and access to updates, for a
year.

There is a minor issue with the Python 2.2 version. This will be fixed
and released in the next few days. In the meantime the previous version
(0.4.6) is available for download from the shop. If you purchase this
distribution your year will run from the date of the release of 1.0.0.

Paying for **Movable Python** supports the development of the other
Open Source `Voidspace Python Projects
<http://www.voidspace.org.uk/python/index.shtml>`_.


What is Movable Python ?
===================

**Movable Python** is a distribution of Python for Windows that doesn't
need to be installed. It easily fits onto a USB memory stick. Python on
a stick.

It is integrated with SPE, the Python IDE, to make **Movable Python** a
portable Build, Test, and Run environment. It has a nice GUI to launch
programs and control its behaviour.

Movable Python is useful in the following situations:

* Machines where you can't install programs.
* Where you need a portable 'Build, Test, and Run' Python environment.
* Having several versions of Python on the same machine for
forward/backward compatibility testing.
* Easily deploying Python scripts without having to install Python.
* Try before you buy - test Python without having to install it,
including new versions .
* 'Python Runtime Environment'. '``.py``' files can be associated with
movpy.

For more information, see `An Introduction to Movable Python
<http://www.voidspace.org.uk/python/movpy/introduction.html>`_.


What's New ?
==========

Changes since version 0.4.6.

Completely new method for running files. This means you can launch
multiple programs from the GUI.

Lots of new libraries and tools included. Virtually all the included
tools have had version upgrades since the last release.

The GUI does a lot more :

* Version number and Python version displayed on the GUI
* You can pass arguments to your programs
* It remembers the last directory you ran a program from
* You choose if launched programs have a console box or not
* You can configure the options programs are run with
* You can edit the default options
* Four configurable Quick Launch buttons
* You can launch SPE from the GUI
* You can launch the documentation (About)
* You can launch an interpreter console
* You can close the GUI without having to launch a program or go to the
interpreter

The following (command line) options are new :

* ``f`` - run script in it's directory
* ``b`` - pause after running script
* ``o`` - override default options
* ``die`` - get rid of GUI after running
* ``k`` - run with console from movpyw
* ``koff`` - run without console from movpy

Complete documentation rewrite.

Docs are now built with `rest2web
<http://www.voidspace.org.uk/python/rest2web/>`_.

``movpyw.exe`` is now included in the Python 2.2 distribution.

Bug fixed where first command line argument to your program was always
lost. {sm;:oops:}

Bug fixed so that ``IPOFF`` actually works now.

Bug fixed so that ``-p`` in ``config.txt`` now works.

Lots of other minor changes and improvements. {sm;:-)}


Known Issues
==========

There are some (minor) known issues with version 1.0.0. These will be
fixed soon.

* Version for Python 2.2 not yet available.
* Possible issue running ``movpy.exe`` from long file paths on Windows
98.
* The ``lib`` directory is not added to ``sys.path`` before entering
interactive mode.

There are also several items in the `TODO
<http://www.voidspace.org.uk/python/movpy/TODO.html>`_ list. Many of
these are future ways that **Movable Python** could be developed.



From reply.in.the.newsgroup at my.address.is.invalid  Sat Feb  4 11:58:11 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Sat, 04 Feb 2006 17:58:11 +0100
Subject: Extract contents of html cells
References: <ds2l58$ei8$1@volcano1.grnet.gr>
Message-ID: <67n9u1h34jqh2fvq2kq4go7r4hdret5kp0@4ax.com>

Robot:
>I need to create a script which will extract the contents of 2 cells of
>an html that contains a specified number of cells.Then I need to put
>that contents in another cells of my own html page.How can i do that?

http://www.python.org/doc/lib/module-htmllib.html

-- 
Ren? Pijlman


From steve at REMOVETHIScyber.com.au  Fri Feb  3 12:00:53 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sat, 04 Feb 2006 04:00:53 +1100
Subject: newbie - script works in PythonWin - fails from Python
References: <1138960717.927268.22640@g44g2000cwa.googlegroups.com>
	<1138961665.684357.78060@g44g2000cwa.googlegroups.com>
	<1138962543.290178.77790@g47g2000cwa.googlegroups.com>
	<pan.2006.02.03.11.04.13.213569@REMOVETHIScyber.com.au>
	<1138978837.557550.144350@f14g2000cwb.googlegroups.com>
Message-ID: <pan.2006.02.03.17.00.52.965138@REMOVETHIScyber.com.au>

On Fri, 03 Feb 2006 07:00:37 -0800, marcus.tettmar wrote:

> Hi,
> 
> This is all I get:
> 
> error 250477278

What is this line? That doesn't look like part of a Python traceback. I
suppose it is possible that the DLL is printing it before the exception is
raised. Or did you type it yourself?


> Traceback (most recent call last):
>   File "script1.py", line 5, in ?
>     Inst = lib.Initialize(0)
> WindowsError: exception code 0xeedfade
> 
> I get this when running python.exe script1.py

You're still making it as hard as possible for anyone to help you. Is it a
secret what DLL you are trying to call? What is "lib"?

Googling on 0xeedfade suggests that it is an internal Delphi error,
possibly an out-of-memory error. Are you calling a Delphi DLL? What does
that exception mean?


-- 
Steven.



From fredrik at pythonware.com  Tue Feb  7 02:31:55 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 7 Feb 2006 08:31:55 +0100
Subject: Question about idioms for clearing a list
References: <mailman.1294.1138727665.27775.python-list@python.org>	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>	<mailman.1489.1139232969.27775.python-list@python.org><pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au>	<ds83kd$98m$1@sea.gmane.org><mailman.1510.1139250471.27775.python-list@python.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>
Message-ID: <ds9idd$1hc$1@sea.gmane.org>

Steven D'Aprano wrote:

> > so we can have three ways to do the same thing?  the right way to
> > nuke a sequence is to do "del L[:]".  this is explained in Python 101.
>
> The Zen isn't "only one way to do it". If it were, we
> wouldn't need iterators, list comps or for loops,
> because they can all be handled with a while loop (at
> various costs of efficiency, clarity or obviousness).
>
> del L[:] works, but unless you are Dutch, it fails the
> obviousness test.

unless you read some documentation, that is.  del on sequences
and mappings is a pretty fundamental part of Python.  so are slicings.

both are things that you're likely to need and learn long before you
end up in situation where you need to be able to clear an aliased
sequence.

> It also fails the introspection test:

so does "print L".

</F>





From erniedude at gmail.com  Tue Feb  7 15:52:21 2006
From: erniedude at gmail.com (Ernesto)
Date: 7 Feb 2006 12:52:21 -0800
Subject: Regular Expression Syntax Help
In-Reply-To: <1139324925.233027.26430@o13g2000cwo.googlegroups.com>
References: <1139324925.233027.26430@o13g2000cwo.googlegroups.com>
Message-ID: <1139345541.020330.102130@g43g2000cwa.googlegroups.com>

So now I need to add the requirement that only "Name:" 's which are
followed by

"Request: Play" or "Request: Next" ANYWHERE between the previous titles
and the new titles.  Can I use RE's for that ?


Ernesto wrote:
> I'm trying to get the right syntax for my regular expression.  The
> string I'm trying to parse is:
>
> # myString
> [USELESS DATA]
> Name:  David Dude
> [USELESS DATA]
>
> Right now, I'm using the following code:
>
>
> pattern_Name= '''(?x)
>     Title:\s+(\w+)\s+
> '''
> names = re.findall(pattern_Name, myString)
> print names
>
> This prints out a list containing only the first names.  I want to
> search the string until it finds a '\n' endline, but I experimented
> with that, and couldn't find what I need.



From bearophileHUGS at lycos.com  Sat Feb 25 14:11:05 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 25 Feb 2006 11:11:05 -0800
Subject: Path (graph) shower utility
References: <mailman.2338.1140685468.27775.python-list@python.org>
	<slrne01a6j.2t1.grahn+nntp@frailea.sa.invalid>
Message-ID: <1140894665.613159.148960@j33g2000cwa.googlegroups.com>

Thank you Jorgen, now I understand the question, and the answer isn't
difficult :-)

Graphviz is good enough for this purpose.

>but IIRC there are Python bindings for it as well.<

Durumdara can use an email module to extract data, then a graph library
to create the graph, and then save the result in dot format for
Graphviz.
My Graph is probably enough:
http://sourceforge.net/projects/pynetwork/
Otherwise NetworkX is good:
https://networkx.lanl.gov/
There are other libs around, I have seen a new one quite recently.

Bye,
bearophile



From python at hope.cz  Wed Feb  8 09:48:30 2006
From: python at hope.cz (Lad)
Date: 8 Feb 2006 06:48:30 -0800
Subject: What editor shall I use?
Message-ID: <1139410110.389122.215400@z14g2000cwz.googlegroups.com>

What editor shall I use if my Python script must contain utf-8
characters?
I use XP
Thank you for reply
l.b.



From peter at engcorp.com  Mon Feb 13 22:18:56 2006
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 13 Feb 2006 22:18:56 -0500
Subject: listing attributes
In-Reply-To: <1139884643.749492.221140@g43g2000cwa.googlegroups.com>
References: <1139884643.749492.221140@g43g2000cwa.googlegroups.com>
Message-ID: <dsri77$5ue$1@sea.gmane.org>

Thomas Girod wrote:
> I'm trying to get a list of attributes from a class. The dir() function
> seems to be convenient, but unfortunately it lists to much - i don't
> need the methods, neither the built-in variables.
> 
> In fact, all my variables are referencing to objects of the same type.
> Can anyone suggest me a way to get this list of variables ?

Does the __dict__ attribute help you?  (Try viewing obj.__dict__ at the 
interpreter prompt and see if it has what you expect. 
obj.__dict__.keys() would be just the names of those attributes.)

-Peter



From Matt  Tue Feb 14 16:51:31 2006
From: Matt (Matt)
Date: Tue, 14 Feb 2006 21:51:31 GMT
Subject: Mac OS X - Deployment 
Message-ID: <yEncExpress_Rulz!_www.techsono.com_3222798691@firstva.com>

Hi Everybody,

I just spent about an hour googling and still can't find out how to deploy a 
Python app to Mac OS X.

I just finished a simple Hello-World GUI app using wxPython and deployed it to 
a WinXP system using PyInstaller. So I am familiar with the basic tools.

It would be great if I could build an OS X executable from my XP system. Is 
that possible? If so, is it documented anywhere? 

If I can't do it on XP, I suppose I would have to install Python and wxPython 
on a Mac, then copy over my HelloWorld.py file, but what then? I know how to 
make DMG files, but what woudl go into the DMG?

I am used to REALbasic where you write your code and then push the "Build" 
button and executables for Linux, Windows, and Mac are created in less than a 
minute. Maybe the Python world will be as advanced one day...

Thanks,
Matt





From tim.hochberg at ieee.org  Tue Feb  7 20:25:02 2006
From: tim.hochberg at ieee.org (Tim Hochberg)
Date: Tue, 07 Feb 2006 18:25:02 -0700
Subject: Question about idioms for clearing a list
In-Reply-To: <1139355876.391746.45580@g44g2000cwa.googlegroups.com>
References: <mailman.1294.1138727665.27775.python-list@python.org>	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>	<mailman.1489.1139232969.27775.python-list@python.org>	<ds83kd$98m$1@sea.gmane.org>	<43E7F59B.9070009@REMOVEMEcyber.com.au>	<E78Gf.22893$Jd.14515@newssvr25.news.prodigy.net>	<mailman.1567.1139348019.27775.python-list@python.org>
	<1139355876.391746.45580@g44g2000cwa.googlegroups.com>
Message-ID: <dsbh9i$baj$1@sea.gmane.org>

bonono at gmail.com wrote:
> Fredrik Lundh wrote:
> 
>>>Python now has, what, three built-in mutable collections types:
>>>lists, dictionaries, and sets. Dicts and sets both have a clear()
>>>method and lists do not.
>>
>>dicts and sets are mappings, and lists are not.  mappings don't
>>support slicing.  lists do.
> 
> 
> I am confused. Could you explain this ? I was under the impression said
> above(mapping don't support slicing), until after I read the language
> reference. I don't think it is slicing as in the list slicing sense but
> it does use the term "extend slicing".
> 
> http://www.python.org/doc/2.4.2/ref/slicings.html
> 
> "The semantics for an extended slicing are as follows. The primary must
> evaluate to a mapping object, and it is indexed with a key that is
> constructed from the slice list, as follows. If the slice list contains
> at least one comma, the key is a tuple containing the conversion of the
> slice items; otherwise, the conversion of the lone slice item is the
> key. The conversion of a slice item that is an expression is that
> expression. The conversion of an ellipsis slice item is the built-in
> Ellipsis object. The conversion of a proper slice is a slice object
> (see section 3.2) whose start, stop and step attributes are the values
> of the expressions given as lower bound, upper bound and stride,
> respectively, substituting None for missing expressions."


This is in place to support multidimensional arrays, such as in numpy. 
If, for instance, you have a 9x9 array A, then A[3:6,3:6] will extract a 
3x3 block from the center of it. A[3:6,3:6] is equivalent to 
A[(slice(3,6,None), slice(3,6,None))] and the resulting tuple gets 
passed through the mapping interface, but it is not a mapping in any 
real sense.

I don't think there's anything in core Python that uses this and it's 
not really relevant to this thread.

-tim



From steve at REMOVETHIScyber.com.au  Fri Feb 17 20:09:02 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sat, 18 Feb 2006 12:09:02 +1100
Subject: Python 3000 deat !? Is true division ever coming ?
References: <1139810036.943598.229030@g47g2000cwa.googlegroups.com>
	<dt4pj8$o21$1@wake.carmen.se>
	<1140213665.105188.103450@o13g2000cwo.googlegroups.com>
Message-ID: <pan.2006.02.18.01.09.01.860632@REMOVETHIScyber.com.au>

On Fri, 17 Feb 2006 14:01:05 -0800, seb.haase wrote:

> Thank you very much, Magnus !
> This is the answer I had been waiting for:
>> A problem as I see it today, is that this behaviour is
>> not actively encouraged. The tutorial, which is maintained
>> and updated, still describes old style classes, and the
>> old division behaviour.
> 
> My main point was/is:  why is there not more discussion about "true
> division" !!?

What is there to discuss?


> Just like the second answer to my posting clearly showed:
> PEOPLE THINK TRUE DIVISION IS "ONLY IN MATLAB"  !!

I've never even used Matlab. But I have a calculator. (Actually I have
about half a dozen calculators.) In every single one of them, 1/2 gives
0.5 instead of 0. I'm even capable of doing that calculation in my head.
So I don't think true division is only in Matlab.


> As you pointed out: the "true division" part of "Python3000" might be
> one of the "scariest" and should therefore be pointed out already in
> the tutorial !!  (It would look quite ugly to newcomers, though)

The tutorial shouldn't talk about Python3000 at all. What would be the
point of that? The tutorial is there to teach about the way Python works
now, not to make guesses and prediction about how it will work some time
in the indefinite future.


> Having said that:  I would vote against EVER introducing true division
> as default - because it will just PISS too many (long time python)
> people OFF. ;-)

Do you realise that the reason true division was introduced into Python
was because many long-time Python programmers requested it? So far from
annoying them, it is a feature that most Python programmers are waiting
for.



-- 
Steven.



From jgardner at jonathangardner.net  Wed Feb  8 19:42:29 2006
From: jgardner at jonathangardner.net (Jonathan Gardner)
Date: 8 Feb 2006 16:42:29 -0800
Subject: still a valid book?
In-Reply-To: <uUsGf.1584$No6.37778@news.tufts.edu>
References: <uUsGf.1584$No6.37778@news.tufts.edu>
Message-ID: <1139445749.902210.323680@f14g2000cwb.googlegroups.com>

You may want to read
http://python.org/doc/2.4.2/whatsnew/whatsnew24.html to get an idea of
what has changed from 2.3 to 2.4 if you buy the 2.3 book.



From tdwdotnet at gmail.com  Tue Feb 21 13:37:25 2006
From: tdwdotnet at gmail.com (Tim Williams (gmail))
Date: Tue, 21 Feb 2006 18:37:25 +0000
Subject: Zope/Plone - Is it the right solution?
In-Reply-To: <B34636176.882.1348.1@mx-extra.net>
References: <1140532818.195281.316580@g44g2000cwa.googlegroups.com>
	<B34636176.882.1348.1@mx-extra.net>
Message-ID: <9afea2ac0602211037l2327fa0em@mail.gmail.com>

On 21 Feb 2006 08:00:03 -0800, Michele Simionato <
michele.simionato at gmail.com> wrote:
>
>
> For easy of use nothing beats CherryPy, but I am not sure how stable it
> is.
>

If CherryPy is of interest then don't discount Karrigell,  it has a smaller
learning curve and appears stable.   Overall I found it quicker to become
productive than with CP.

see   http://quentel.python-hosting.com/wiki/index.pih  and
http://karrigell.sourceforge.net/




--

Tim Williams
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From samrobertsmith at gmail.com  Fri Feb 10 05:53:30 2006
From: samrobertsmith at gmail.com (linda.s)
Date: Fri, 10 Feb 2006 02:53:30 -0800
Subject: a second TKinter
Message-ID: <1d987df30602100253x33aece59u425dd7d61c0ffa3f@mail.gmail.com>

I found if I opened a second TKinter, Python will go out of work. But
I need two graph outputs at the same time. What to do?
Linda.


From tim.golden at viacom-outdoor.co.uk  Thu Feb 16 10:42:09 2006
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Thu, 16 Feb 2006 15:42:09 -0000
Subject: Win32_Process.Create -- not starting process
Message-ID: <9A28C052FF32734DACB0A288A3533991044D2578@vogbs009.gb.vo.local>

[abcd]

| Tim,
|     I am skipping using the batch file and only executing the python
| script directly...and so far it works fine.
| 
| So now I have:
| pid, retVal =
| wmi.WMI("1.2.3.4").new("Win32_Process").Create(CommandLine="c:
| \python\python.exe
| c:\some_script.py")
| 
| Thanks again...not sure why when using the batch file to start it
| wouldnt always work, but as long is it works now!

Thanks for letting me know. Hope it continues to work
for you.

BTW, I would recommend you either to use a raw string
for that command line (r"c:\python\python.exe c:\xx.py") or
to double up your slashes ("c:\\python\\python.exe c:\\xx.py").
As it happens \p has no special meaning that I'm
aware of, but better safe than sorry...

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
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From python.list at tim.thechases.com  Thu Feb 23 05:44:53 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 23 Feb 2006 04:44:53 -0600
Subject: Detec nonascii in a string
In-Reply-To: <b43bf2080602230732o11cacae7od8139187afe852eb@mail.gmail.com>
References: <b43bf2080602230732o11cacae7od8139187afe852eb@mail.gmail.com>
Message-ID: <43FD9225.1020003@tim.thechases.com>

>  How do I detect non-ascii letters in a string? I want to detect the
>  condition that a string have a letter that is not here:
>  string.ascii_letters

I don't know how efficient it is, but it's fairly clean:

clean_string = ''.join([c for c in some_string if c in 
string.ascii_letters])

If you just want to do the detection, you can do

if [c for c in some_string if c not in string.ascii_letters]:
    print "hey, something's bogus!"
else:
    print "doing stuff with a the valid string %s" % some_string

which takes advantage of the fact that an empty list is considered a 
False condition.

-tkc







From roy at panix.com  Tue Feb 14 10:48:23 2006
From: roy at panix.com (Roy Smith)
Date: Tue, 14 Feb 2006 15:48:23 +0000 (UTC)
Subject: how do you pronounce 'tuple'?
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<11v032ii4gvik72@corp.supernews.com>
	<1139816300.706181.79250@f14g2000cwb.googlegroups.com>
	<mailman.1905.1139931613.27775.python-list@python.org>
Message-ID: <dssu47$2qb$1@reader2.panix.com>

Tim Peters  <tim.peters at gmail.com> wrote:
> the-acid-test-is-whether-you-say-"xor"-with-one-syllable-or-three-ly y'rs

I pronounce it with two.


From sullivanz.pku at gmail.com  Sun Feb 19 01:12:28 2006
From: sullivanz.pku at gmail.com (sullivanz.pku at gmail.com)
Date: 18 Feb 2006 22:12:28 -0800
Subject: Any Tkinker bases rich text widget?
Message-ID: <1140329548.448381.13600@g47g2000cwa.googlegroups.com>

Hi all
I am using the standard python GUI Tkinter as my program's main
interface. Although I know wxPython has some widget to support rich
text widget, but I do not have time to shift to wx---- series. Does
anyone know any Tkinter based widget that support:

1. Blod, Italic, Underline and their combinations.
2. Several most commonly used fonts, like Times New Roman and Arial
3. Multiline text
4. Cross platform support. Available in Linux-RedHat and Mac OS series
and Windows 2000 or above.
5.Image embedding. Support jpeg, gif, bmp. The more the better.

and better support:
Hyperlink, Text color, the more the better.

Thank you so much for help!



From egooli at gmail.com  Tue Feb 21 10:29:43 2006
From: egooli at gmail.com (gooli)
Date: 21 Feb 2006 07:29:43 -0800
Subject: Looking for Python hackers in Tel Aviv
Message-ID: <1140535783.270207.63640@f14g2000cwb.googlegroups.com>

Tuzig is a small start-up company focused on creating consumer
appplications. We're based in Tel Aviv, Israel and looking for good
people with wicked Python skills.

No, really. We are a real company with real money. We even have
offices. We even have a blog to prove that we have offices. Check us
out at http://www.tuzig.com (especially the Hiring! page) and send us
your resume to hiring at tuzig.com if you're interested and you live near
by.



From russblau at hotmail.com  Fri Feb 10 18:32:52 2006
From: russblau at hotmail.com (Russell Blau)
Date: Fri, 10 Feb 2006 18:32:52 -0500
Subject: absolute removal of '\n' and the like
References: <1139613718.688010.216370@z14g2000cwz.googlegroups.com>
Message-ID: <dsj7ul$mtm$1@sea.gmane.org>


"S Borg" <spwpreston at gmail.com> wrote in message
news:1139613718.688010.216370 at z14g2000cwz.googlegroups.com...
>  If I have a string, what is the strongest way to assure the
> removal of any line break characters?
>
> Line break characters must always be the last character in a line, so
> would
> this:    str = linestring[:-1]
>
>  work?

Er, yes, if you don't mind (a) mangling any string that *doesn't* have a
newline as the last character, and (b) messing up any subsequent part of
your program that tries to use the built-in str() function (because you just
reassigned that name to something else).

I'd suggest:

    foo = linestring.rstrip("\n")

You can also add to the quoted string any other characters you want to have
stripped; for example,

    foo = linestring.rstrip("\n\r\t")

Or if you want to strip off *all* whitespace characters, just leave it out:

    foo = linestring.rstrip()

Russ






From larry.bates at websafe.com  Sat Feb 11 17:10:54 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Sat, 11 Feb 2006 16:10:54 -0600
Subject: Is python very slow compared to C
In-Reply-To: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
Message-ID: <lsCdnb7t09Bt_XPeRVn-pg@comcast.com>

diffuser78 at gmail.com wrote:
> I have just started to learn python. Some said that its slow. Can
> somebody pin point the issue.
> 
> Thans
> 
"Some" doesn't know what he/she/they are talking about.
Generalizations like that upset me because it shows someone
that has some predisposition to some other language and they
don't want to be confused by "facts".  Many "compiled
language" programmers fall into this category.  Many times
you can write, debug, execute, and document a Python program
before "compiled language" guys can even get started.  Many
believe that Python is also more maintainable over time.
When you come back to it in 6 months you will ACTUALLY BE ABLE
TO READ THE CODE.  Productivity cannot be measured by
benchmarks alone.

Give Python a try and I'll bet you find that it is fast enough
(that's all that is important right) for all but device
drivers and highly scientific applications (and even then
there are solutions). The parts of Python that need to be
fast have been rewritten as binary libraries.  That way you
get the best of both worlds: high level language that has
fast libraries when required.

-Larry Bates


From lycka at carmen.se  Wed Feb  8 06:02:14 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 08 Feb 2006 12:02:14 +0100
Subject: Is Python good for web crawlers?
In-Reply-To: <1139330008.270988.227170@g44g2000cwa.googlegroups.com>
References: <1139330008.270988.227170@g44g2000cwa.googlegroups.com>
Message-ID: <dscj3o$nll$1@wake.carmen.se>

Tempo wrote:
> I was wondering if python is a good language to build a web crawler
> with? For example, to construct a program that will routinely search x
> amount of sites to check the availability of a product. Or to search
> for news articles containing the word 'XYZ'. These are just random
> ideas to try to explain my question a bit further. Well if you have an
> opinion about this please let me know becasue I am very interested to
> hear what you have to say. Thanks.

I dunno, but there are these two guys, Sergey Brin and Lawrence Page,
who wrote a web crawler in Python. As far as I understood, they were
fairly successful with it. I think they called their system Koogle,
Bugle, or Gobble or something like that. Goo...can't remember.

See http://www-db.stanford.edu/~backrub/google.html

They've also employed some clever Python programmers, such as Greg
Stein, Alex Martelli (isn't he a bot?) and some obscure dutch
mathematician called Guido van something. It seems they still like
Python.


From maketo at ukato.freeshell.org  Wed Feb  1 14:04:10 2006
From: maketo at ukato.freeshell.org (Ognen Duzlevski)
Date: Wed, 1 Feb 2006 19:04:10 +0000 (UTC)
Subject: dynamic class instantiation
References: <drlrtb$91v$1@chessie.cirr.com> <43de9abc$1_2@newspeer2.tds.net>
	<drnjid$flc$2@chessie.cirr.com>
	<slrndu0d72.ltb.volker_grabsch@modi.mathematik.hu-berlin.de>
Message-ID: <drr0na$rp0$1@chessie.cirr.com>

Volker Grabsch <volker_grabsch at v.notjusthosting.com> wrote:
> Ognen Duzlevski wrote:
> > Kent Johnson <kent at kentsjohnson.com> wrote:
> >> Ognen Duzlevski wrote:
> >> > Say I got "page" as a string. How do I go about 
> >> > instantiating a class from this piece of information? To make it 
> >> > more obvious how do I create the page() class based on the "page" 
> >> > string I have? 
> >
> >> Use getattr().
> >
> > Hi Kent, this is exactly what I was looking for. I can't believe I didn't think
> > of getattr() myself! ;(

> However, remember that this solves your problem just temporarily.

> Your main problem is still a deep design failure. Code generators are
> relicts, hard to maintain, and usually just plain ugly. Your application
> isn't that special.

> I'm sure you could replace 2/3 of your code with something much simpler
> (and shorter!) just by not inventing a new language and using the power
> of Python instead.

Hi Volker,

I appreciate your comments. Basically, the reason why this code generator
exists is the fact that I do not want to hard-code the resulting xml in 
any way. The users of the web/db framework of which this solution is part of
might like the "web page" definition I offer them, but, some might want to extend it.
While dom allows me to traverse an xml hierarchy - it does not allow me to
give "meaning" to the tags. The only way to do that (for me) is to represent
the tags as classes with containers containing other classes (tags) and so on. Since
I do not know ahead of time what the tags will be - I need to generate the code
to actually handle them.

Can you suggest a better approach or did you already do that and I just missed 
it? :)

Cheers,
Ognen


From bearophileHUGS at lycos.com  Sat Feb 11 16:52:03 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 11 Feb 2006 13:52:03 -0800
Subject: Is python very slow compared to C
In-Reply-To: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
Message-ID: <1139694723.857673.263750@z14g2000cwz.googlegroups.com>

Yes this language is very slow, but frequently this isn't a problem,
because you are using fast functions/libraries written in C, or you are
doing I/O bound operations. And Psyco, numeric/numarray, ShedSkin can
help in some other cases (Pyrex and other solutions allow you to mix in
lower level languages). If you are looking for pure algorithmic speed
you probably have to go look for other languages, like C, C++, Ocaml,
typed Lisp code, etc.

Bye,
bearophile



From scott.daniels at acm.org  Fri Feb  3 14:36:52 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Fri, 03 Feb 2006 11:36:52 -0800
Subject: MySQLdb question... using table name as arg
In-Reply-To: <mailman.1392.1138992081.27775.python-list@python.org>
References: <%cNEf.19800$sA3.14913@fed1read02>
	<mailman.1392.1138992081.27775.python-list@python.org>
Message-ID: <43e3afc5$1@nntp0.pdx.net>

Carsten Haese wrote:
> On Fri, 2006-02-03 at 13:24, Sean Berry wrote:
>> I have four tables that all have the same column names (50 in each.)
>> I ...  would like to use the table name as a variable in each query so
>> the code can be used for each of the 4 tables....
>> To ensure that string are quoted properly without any hassle I use the 
>> execute function like so assuming c is my cursor object...
>>
>> c.execute("update tableName set col1 = %s, col2 = %s, col3 = %s, ...", 
>> (val1, val2, val3, ...))
>>
>> What is the best (easiest) way for me to accomplish this?  I know it may be 
>> a stupid question but I just can't figure it out.
> 
> As you have discovered, the table name is not allowed to be a parameter....
>    queryString = "update "+tableName+" set col1=%s, col2=%s,..."
>    c.execute(queryString, (val1, val2,...))


Since you are in control of the query strings, you might try:
choose a string ('<table>' in this example) to represent the table name
that will never appear in your queries to represent the table name,
then do something like:

     for table_name in 'first', 'second', 'third', 'fourth':
         def perform(query, args):
             return cursor.execute(
                       table_name.join(query.split('<table>')), args)
         perform('UPDATE <table> SET col1 = %s, col2 = %s', (val1, val2))
         perform('UPDATE <table> SET col4 = %s, col5 = %s', (val4, val5))

Although, frankly, this doesn't sound like a well-designed database.


--Scott David Daniels
scott.daniels at acm.org


From steve at REMOVETHIScyber.com.au  Sat Feb  4 09:51:52 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sun, 05 Feb 2006 01:51:52 +1100
Subject: numeric expression from string?
References: <mailman.1413.1139061291.27775.python-list@python.org>
Message-ID: <pan.2006.02.04.14.51.46.770998@REMOVETHIScyber.com.au>

On Sat, 04 Feb 2006 06:48:11 -0500, Brian Blais wrote:

> Hello,
> 
> I have a string input from the user, and want to parse it to a number, and would like 
> to know how to do it.  I would like to be able to accept arithmetic operations, like:
> 
> '5+5'
> '(4+3)*2'
> '5e3/10**3'
> 
> I thought of using eval, which will work, but could lead to bad security problems 
> (not that it's a big  deal in my app, but still...)

It is good to be cautious. Big thumbs up. But what exactly are you worried
about? Do you think your users might enter something Evil and break their
own system? I'd suggest that's not your problem, and besides, it is hard
to think of anything they could do with eval that they couldn't do by
exiting your app and running something Evil in their shell prompt.

Are you running this script as a cgi script? Then remote users might use
eval to break your system, and you are right to avoid it.

Are you worried about angry customers calling you up with bizarre bugs,
because they entered something weird into their input string? One
possible way to avoid those problems is to validate the string before
passing it to eval:

goodchars = "0123456789+-/*()eE."
for c in user_input:
    if c not in goodchars:
        raise ValueError("Illegal character detected!")
result = eval(user_input)



> string.atof won't do the job.  Is there a preferred way of doing this?

Look into PyParsing:

http://cheeseshop.python.org/pypi/pyparsing/1.3.3

If you read back over the Newsgroup archives, just in the last week or so,
there was a link to a PyParsing tutorial.


-- 
Steven.



From grflanagan at yahoo.co.uk  Sun Feb 19 10:10:34 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 19 Feb 2006 07:10:34 -0800
Subject: 2-dimensional data structures
References: <43ss7mF1n4eg5U1@individual.net>
	<mailman.1110.1138311076.27775.python-list@python.org>
	<45pk2dF7o7egU1@individual.net>
Message-ID: <1140361834.200309.127760@f14g2000cwb.googlegroups.com>

anthonyberet wrote:
> I want to work on a sudoku brute-forcer, just for fun.
>...
> Thanks for the advice (to everyone in the thread).
> I think I will go with nested lists.
> However, I am running into a conceptual problem.
> My approach will be firstly to remove all the impossible digits for a
> square by searching the row and column for other occurances.
>
> However, I wondering how to approach the search of the nine regions of
> the grid. I am thinking of producing another nested list, again 9x9 to
> store the contents of each region, and to update this after each pass
> through -and update of- the main grid (row and column).
>
> I am not sure how to most efficiently identify which region any given
> square on the grid is actually in - any thoughts, for those that have
> done this? - I don't want a massive list of IF conditionals if I can
> avoid it.


Some 'UselessPython' :

import math

def SudokuOrder( length ):
    block_length = int(math.sqrt(length))
    for block in range(length):
        row_offset = block_length * ( block // block_length )
        col_offset = block_length * ( block % block_length )
        for i in range( block_length ):
            for j in range( block_length ):
                yield i+row_offset, j+col_offset

grid = list(SudokuOrder(9))

BLOCK1 = grid[:9]
BLOCK2 = grid[9:18]
BLOCK9 = grid[72:81]

print
print 'BLOCK1 ->', BLOCK1
print
print 'BLOCK2 ->', BLOCK2
print
print 'BLOCK9 ->', BLOCK9


BLOCK1 -> [(0, 0), (0, 1), (0, 2), (1, 0), (1, 1), (1, 2), (2, 0), (2,
1), (2, 2)]

BLOCK2 -> [(0, 3), (0, 4), (0, 5), (1, 3), (1, 4), (1, 5), (2, 3), (2,
4), (2, 5)]

BLOCK9 -> [(6, 6), (6, 7), (6, 8), (7, 6), (7, 7), (7, 8), (8, 6), (8,
7), (8, 8)]


Gerard



From andy at reportlab.com  Tue Feb 28 06:49:20 2006
From: andy at reportlab.com (Andy Robinson)
Date: Tue, 28 Feb 2006 11:49:20 +0000
Subject: UK Python Conference - 19-20 April 2006
Message-ID: <440438C0.30504@reportlab.com>


The ACCU is once again hosting a UK Python Conference on the above dates 
at the Randolph Hotel in Oxford.  Sign up now.....

   http://www.accu.org/index.php/conferences/2006/schedule

PROGRAMME
=========
I am happy to announce that Guido van Rossum is once again a keynote 
speaker for the entire ACCU conference.   Following his keynote we have 
a single, 2-day Python track on Wednesday and Thursday including...

	Steve Holden: The Best of PyCon
	Michael Hudson: Error Handling with Recovery
	Phil Thompson: PyQT 4
	Michael Hudson: PyPy - a progress report
	Simon Willison: Django
	Remi Delon:  CherryPy and TurboGears
	Chris Withers: Templating systems
	Andy Robinson: Metadata and models in Python
	Andrew Thompson: Financial Programming in Python

...and of course lightning talks and BOFS will be welcome....


Friday 21st will feature a Dynamic Languages track with in-depth talks 
on Javascript, Ruby and Groovy, which I am sure will be of great 
interest to Python developers; and of course the dinner.

PRE CONFERENCE PYTHON TUTORIAL:
===============================
John Pinner will be giving a full day "Python for Programmers" tutorial 
on Tuesday prior to the main event.  This tutorial is aimed at 
programmers who have no previous knowledge of Python but who would like 
to know more about it. If you want to convert your colleagues, this is 
where to send them....


ABOUT THE ACCU CONFERENCE
=========================
For those not familiar with the event, the ACCU conference is one of the 
foremost gatherings of programming talent in the world, regularly 
featuring authors and major figures from the C/C++/C#/Java/Python and 
other communities.    The cheapest way to attend is to join the ACCU

This will be the LAST CHANCE to attend this fantastic event; after more 
than 5 years of being nurtured by the ACCU, the UK Python community will 
hopefully be organising a standalone conference in future years.  Python 
talks will continue to be welcome (and we hope numerous) on the ACCU 
programme, but not as an advertised "mini-conference"; instead we'll be 
shifting focus to dynamic languages in general.



Best Regards,


Andy Robinson
ACCU Conference Committee








From localpricemaps at gmail.com  Thu Feb  9 02:03:41 2006
From: localpricemaps at gmail.com (localpricemaps at gmail.com)
Date: 8 Feb 2006 23:03:41 -0800
Subject: how to remove <BR> using replace function?
In-Reply-To: <1139464079.635612.289930@o13g2000cwo.googlegroups.com>
References: <1139462640.951603.302830@g44g2000cwa.googlegroups.com>
	<1139464079.635612.289930@o13g2000cwo.googlegroups.com>
Message-ID: <1139465695.997171.159150@g44g2000cwa.googlegroups.com>

nope didn't work



From universal_used at hotmail.com  Thu Feb  2 02:32:06 2006
From: universal_used at hotmail.com (questions?)
Date: 1 Feb 2006 23:32:06 -0800
Subject: redirect and python
Message-ID: <1138865526.286565.282150@g14g2000cwa.googlegroups.com>

I am calling system command in python by os.system()

I do, os.system("wget http://blah blah blah")

then I run the program by ./programname >redirected file
The things put to screen doesn't redirect to the file I want.

What's the trick in here?

Thanks



From LittlePython at lost.com  Thu Feb 16 22:10:10 2006
From: LittlePython at lost.com (LittlePython)
Date: Fri, 17 Feb 2006 03:10:10 GMT
Subject: Seaching Active Directory via ADO
References: <g_7Jf.33401$0H1.22606@trnddc04>
	<1140138661.484502.86380@f14g2000cwb.googlegroups.com>
	<56aJf.78250$_D1.4370@trnddc03>
	<1140142239_1425@sp6iad.superfeed.net>
	<UtaJf.78260$_D1.52493@trnddc03>
	<1140144965_1489@sp6iad.superfeed.net>
	<w_aJf.18163$7C3.755@trnddc08>
Message-ID: <m8bJf.18165$7C3.5786@trnddc08>

Never mind , I know what's wrong ... need to use the right account. It works
great and is a great example .. thx


"LittlePython" <LittlePython at lost.com> wrote in message
news:w_aJf.18163$7C3.755 at trnddc08...
> Do you know what this may mean?
>
> C:\Documents and Settings\Administrator\Desktop\pytest>ADOSeach.py
> Traceback (most recent call last):
>   File "C:\Documents and
Settings\Administrator\Desktop\pytest\ADOSeach.py",
> lin
> e 6, in ?
>     rs,rc=c.Execute("""
>   File "<COMObject ADODB.Connection>", line 3, in Execute
>   File "C:\Python24\Lib\site-packages\win32com\client\dynamic.py", line
258,
> in
> _ApplyTypes_
>     result = self._oleobj_.InvokeTypes(*(dispid, LCID, wFlags, retType,
> argTypes
> ) + args)
> pywintypes.com_error: (-2147352567, 'Exception occurred.', (0, 'Provider',
> 'Tabl
> e does not exist.', None, 1240640, -2147217865), None)
>
> C:\Documents and Settings\Administrator\Desktop\pytest>
> "Roger Upole" <rupole at hotmail.com> wrote in message
> news:1140144965_1489 at sp6iad.superfeed.net...
> > You could also accomplish the same thing using the
> > Command object, but this way is usually more concise
> > for plain Sql.
> >
> >          Roger
> >
> > "LittlePython" <LittlePython at lost.com> wrote in message
> > news:UtaJf.78260$_D1.52493 at trnddc03...
> > > I notice there is no adodb.command. This is not required?
> > > Thx for the example!
> > > "Roger Upole" <rupole at hotmail.com> wrote in message
> > > news:1140142239_1425 at sp6iad.superfeed.net...
> > > > Here's a short example that uses ADO to search for a
> > > > user by wildcard.
> > > >
> > > > import win32com.client
> > > > c = win32com.client.Dispatch("ADODB.Connection")
> > > > c.Open("Provider=ADSDSOObject")
> > > >
> > > > rs,rc=c.Execute("""
> > > > SELECT adspath, title, name
> > > > From 'LDAP://DC=yourdomain, DC=COM'
> > > > where objectClass='user' and name='Roger*'
> > > > """)
> > > >
> > > > while not rs.EOF:
> > > >     for f in rs.Fields:
> > > >         print f.Name, f.Value
> > > >     rs.MoveNext()
> > > >
> > > >     hth
> > > >           Roger
> > > >
> > > > "LittlePython" <LittlePython at lost.com> wrote in message
> > > > news:56aJf.78250$_D1.4370 at trnddc03...
> > > > > Thanks but I was looking more for ADO com object than ADSI or
ldap.
> > > > > For some strange reason it is very hard to locate any working
> scripts
> > > that
> > > > > use ADO  to connect and search AD. Is there an issue with ADO and
> > python
> > > > > when connecting to AD?
> > > > > I have try to build one myself with no luck. I think my problem is
> > with
> > > > > adodb.command calls.
> > > > >
> > > > > Thanks for your response.
> > > > >
> > > > > "alex23" <wuwei23 at gmail.com> wrote in message
> > > > > news:1140138661.484502.86380 at f14g2000cwb.googlegroups.com...
> > > > > > Heya,
> > > > > >
> > > > > > There are a couple of examples on the O'Reilly site. These two
are
> > > > > > taken from 'Active Directory Cookbook', the first uses a COM
> object
> > > > > > while the second uses a native LDAP module:
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
http://www.rallenhome.com/books/adcookbook/src/18.6-rootdse_python_com.py.tx
> > > > > t
> > > > > >
> > > > >
> > > >
> > >
> >
>
http://www.rallenhome.com/books/adcookbook/src/18.6-rootdse_python_ldap.py.t
> > > > > xt
> > > > > >
> > > > > > This might give you a start.
> > > > > >
> > > > > > - alex23
> > > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > > > ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure
Usenet
> > > News==----
> > > > http://www.newsfeeds.com The #1 Newsgroup Service in the World!
> 120,000+
> > > Newsgroups
> > > > ----= East and West-Coast Server Farms - Total Privacy via
Encryption
> > > =----
> > >
> > >
> >
> >
> >
> > ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet
> News==----
> > http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+
> Newsgroups
> > ----= East and West-Coast Server Farms - Total Privacy via Encryption
> =----
>
>




From pommereau at univ-paris12.fr  Wed Feb  8 04:19:45 2006
From: pommereau at univ-paris12.fr (Franck Pommereau)
Date: Wed, 08 Feb 2006 10:19:45 +0100
Subject: The problem of anonymity with decorators
In-Reply-To: <mailman.1563.1139343511.27775.python-list@python.org>
References: <43e8c0bb$0$22678$79c14f64@nan-newsreader-07.noos.net>
	<mailman.1563.1139343511.27775.python-list@python.org>
Message-ID: <43e9b7b2$0$13883$79c14f64@nan-newsreader-06.noos.net>

Alex, Michele and Skip,

Many thanks for your help, I should find my way by putting all these
information together.

Best regards,
Franck


From edloper at gradient.cis.upenn.edu  Fri Feb 24 22:05:02 2006
From: edloper at gradient.cis.upenn.edu (Edward Loper)
Date: Fri, 24 Feb 2006 22:05:02 -0500
Subject: unicode question
Message-ID: <43FFC95E.4030202@gradient.cis.upenn.edu>

I would like to convert an 8-bit string (i.e., a str) into unicode,
treating chars \x00-\x7f as ascii, and converting any chars \x80-xff
into a backslashed escape sequences.  I.e., I want something like this:

 >>> decode_with_backslashreplace('abc \xff\xe8 def')
u'abc \\xff\\xe8 def'

The best I could come up with was:

   def decode_with_backslashreplace(s):
       "str -> unicode"
       return (s.decode('latin1')
                .encode('ascii', 'backslashreplace')
                .decode('ascii'))

Surely there's a better way than converting back and forth 3 times?  Is
there a reason that the 'backslashreplace' error mode can't be used with 
codecs.decode?

 >>> 'abc \xff\xe8 def'.decode('ascii', 'backslashreplace')
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
TypeError: don't know how to handle UnicodeDecodeError in error callback

-Edward



From http  Mon Feb 13 15:58:41 2006
From: http (Paul Rubin)
Date: 13 Feb 2006 12:58:41 -0800
Subject: hard disk activity
References: <1139850420.902979.71620@o13g2000cwo.googlegroups.com>
	<g9i1v1lbf2rhmgskmkh5f9mt73s67umckk@4ax.com>
	<1139857505.376840.37440@g43g2000cwa.googlegroups.com>
	<1139859890.407497.124870@o13g2000cwo.googlegroups.com>
	<1139863885.755813.324450@g47g2000cwa.googlegroups.com>
Message-ID: <7xfymn0yda.fsf@ruckus.brouhaha.com>

"VSmirk" <vania.smirk at gmail.com> writes:
> But the trick in my mind is figuring out which specific bytes have been
> written to disk.  That's why I was thinking device level.  Am I going
> to have to work in C++ or Assembler for something like this?

No, you can do it in Python.  The basic idea is: locally compute a
separate checksum for (say) each 1% chunk of the file.  Do the same
thing on the remote side.  So for a 1GB file, you compute 100
checksums at each end, each checksum covering 10 MB.  Then send the
100 checksums over the network, which is just a few kbytes.  Compare
the checksums and you know which 10MB chunks have changed.  For the
chunks that have changed, divide them into 100-kbyte sub-chunks and
checksum those, etc.  The optimal number of chunks at each level
depends on network speed and various other things.  Anyway this is
basically how rsync works.

Doing anything device level will be highly OS dependent.


From rphillips at engineer.co.summit.oh.us  Thu Feb 16 07:23:41 2006
From: rphillips at engineer.co.summit.oh.us (paron)
Date: 16 Feb 2006 04:23:41 -0800
Subject: Embedding an Application in a Web browser
In-Reply-To: <1140038488.546531.63630@z14g2000cwz.googlegroups.com>
References: <1139930045.408507.151440@g43g2000cwa.googlegroups.com>
	<1140004056.893486.291280@g44g2000cwa.googlegroups.com>
	<1140005817.698597.135220@z14g2000cwz.googlegroups.com>
	<1140038488.546531.63630@z14g2000cwz.googlegroups.com>
Message-ID: <1140092621.522804.288810@f14g2000cwb.googlegroups.com>

>From the OP:
<snip>As for the application it has to be able display simple animated
graphics such as circles, lines and squares. However if someone clicks
on a shape it should open up another application, such as Word. Thanks,

Rod

Python Newbie </snip>

<snip>The application itself can sit on the local
users computer, rather than actually being downloaded via the web. It
will be retrieving data from a variety of sources.</snip>

I was thinking that the security provisions might make it difficult for
the script in the browser to interact with the OS. If that is "simple"
to get around, then I agree, Karrigell is overkill.

OTOH, Karrigell makes it simple to interact with the local machine's
OS, and especially if you are a beginner at Python. YMMV, of course.
Thanks for offering your opinion.

Ron



From Joram.Agten at telindus.be  Wed Feb  1 12:41:24 2006
From: Joram.Agten at telindus.be (Joram Agten)
Date: Wed, 1 Feb 2006 18:41:24 +0100
Subject: os.remove OSError: [Errno 13] Permission denied
Message-ID: <AAC8ECE9B0F2C44EB53913E5EAA0DDDD033D89C8@TBE1MX1.telindus.intra>

Please put me in CC

When running the following program I get frequent errors like this one

Exception in thread Thread-4:
Traceback (most recent call last):
  File "C:\Python24\lib\threading.py", line 442, in __bootstrap
    self.run()
  File "os.remove.py", line 25, in run
    os.remove(filename)
OSError: [Errno 13] Permission denied:
'c:\\docume~1\\joag\\locals~1\\temp\\tmpx91tkx'

When leaving out the touch statement(line 24) in the loop of the class,
I do not get any errors.
This is on Windows XP SP2 with python-2.4.2 (you should have an exe
touch somewhere in you path for this to work)
Can somebody shed any light on this please?

Thanks in advance

Joram Agten
import os
import tempfile
import threading
import subprocess

def touch(filename):
    output = str()
    process = subprocess.Popen("touch " + filename ,
 	                               stdin=None,
stdout=subprocess.PIPE, stderr=subprocess.STDOUT,
 	                               universal_newlines=True)
    process.wait()

class this(threading.Thread):
    def __init__(self):
        threading.Thread.__init__(self)
        self.start()
    
    def run(self):
        for i in range(0, 100):
            filename = tempfile.mktemp()
            f = open(filename, 'w')
            f.write("test")
            f.close()
            touch(filename)
            os.remove(filename)

getters = []
for i in range(0, 10):
    getter = this()
    getters.append(getter)
    
for getter in getters:
    getter.join()

Visit Telindus Access Products  at Cebit 2006, Hall 13, Booth 34, 9-15 March 2006.
Discover Telindus' range of access & surveillance products in a live "voice and video over DSL" demo and collect the new catalogue 2006-2007. See you in Hannover!




From seb.haase at gmail.com  Thu Feb 16 23:55:42 2006
From: seb.haase at gmail.com (seb.haase at gmail.com)
Date: 16 Feb 2006 20:55:42 -0800
Subject: Python 3000 deat !? Is true division ever coming ?
In-Reply-To: <1139928242.726349.221080@g44g2000cwa.googlegroups.com>
References: <1139810036.943598.229030@g47g2000cwa.googlegroups.com>
	<1139928242.726349.221080@g44g2000cwa.googlegroups.com>
Message-ID: <1140152142.080462.99000@g14g2000cwa.googlegroups.com>

Thanks for the replies,
But to point out what the subject of this thread is (sorry for the typo
;-)  :
There is a PEP  (proposal 238) to change Python so that
5/2  WOULD do the true division  -- and obviously break lots of code.

Just type this in your python interpeter:
>>> from __future__ import division
>>> 5/2
2.5

I'm not asking why it _doen't_ work like Matlab.
I'm wondering  what the chances are that what Rocco Moretti is
referring to
(http://www.python.org/doc/2.2.3/whatsnew/node7.html)
is really  planned to be persued...

I don't think "Because this change might break code, it's being
introduced very gradually. Python 2.2 begins the transition, but the
switch won't be complete until Python 3.0."   says enough.

Should I start using
"from __future__ import division" in my modules ?
I fear that it might make my code "unreadable" (people would not expect
this when reading somewhere in the middle of the module !!!)

Thanks,
Sebastian Haase



From me at privacy.net  Mon Feb 27 10:57:43 2006
From: me at privacy.net (Dan Sommers)
Date: Mon, 27 Feb 2006 10:57:43 -0500
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<4402B91A.4010108@tim.thechases.com>
	<mailman.2476.1141052598.27775.python-list@python.org>
Message-ID: <m21wxon6a0.fsf@unique.fqdn>

On Mon, 27 Feb 2006 03:13:08 -0600,
Tim Chase <python.list at tim.thechases.com> wrote:

> Same could go for days of the week:

>>>> dow=enum(("sunday", 0), ("monday", 1), 
> ("start_of_work_week", 1), ... ("friday", 5), 
> ("end_of_work_week", 5)...)

Not really:  In some parts of the world, calendar weeks begin on Monday
and end on Sunday, and in other parts of the world, work weeks begin on
Sunday and end on Thursday.  ISTM that if you want to do anything with
the value of a given enumeration tag (including make greater/less than
comparisons, sort, etc.), then a dictionary might be better than an
enum.  Also, enumeration tags like "end_of_work_week" should be assigned
at run-time based on locale and/or preferences settings (not that you
couldn't have stuck the code above into a preferences file...).

> Given more little grey cells (or gray cells?), I'm sure I could come
> up with more examples of when it's handy to have duplicate values in
> an enum...

I don't know:  If you're using enums as names for otherwise meaningful
values, then you're right.  But if you're using enums as meaningful
names for pairwise distinct concepts, then I think otherwise.  IMO, if
your program breaks if someone re-assigns the values randomly, then a
better solution than an enum exists.  (Or maybe that's because I think
of the tags as nothing more than keywords that work like distinct
values.)

Regards,
Dan

-- 
Dan Sommers
<http://www.tombstonezero.net/dan/>
"I wish people would die in alphabetical order." -- My wife, the genealogist


From felipe.lessa at gmail.com  Sun Feb 12 23:36:13 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Mon, 13 Feb 2006 02:36:13 -0200
Subject: ordered sets operations on lists..
In-Reply-To: <43F007F9.3090103@holdenweb.com>
References: <mailman.1722.1139590689.27775.python-list@python.org>
	<1139592166.993686.212000@f14g2000cwb.googlegroups.com>
	<1139599834.975607.77180@f14g2000cwb.googlegroups.com>
	<1halbdx.dd0p1l1obawfkN%aleaxit@yahoo.com>	<43ef8e5f.625119424@news.oz.net>
	<1hana3d.1bwbt4c1esela5N%aleaxit@yahoo.com>
	<43F007F9.3090103@holdenweb.com>
Message-ID: <1139805374.7547.24.camel@kenshin>

Em Dom, 2006-02-12 ?s 23:15 -0500, Steve Holden escreveu:
> Given that Python 2.4 doesn't even perform simple constant folding for 
> arithmetic expressions
> [snip]

May I ask why doesn't it perform such optimization? Is there any special
difficulties in doing so with the Python compiler?

Also, IIRC Psyco does optimize these constant expressions. Or am I
wrong?

Cheers,
Felipe.

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From c_shyone at yahoo.com  Tue Feb 14 23:14:02 2006
From: c_shyone at yahoo.com (Farel)
Date: 14 Feb 2006 20:14:02 -0800
Subject: Which is faster? (if not b in m) or (if m.count(b) > 0)
Message-ID: <1139976842.179801.285400@z14g2000cwz.googlegroups.com>


Which is Faster in Python and Why?

jc = {}; m = []
x = [ [1,2,3,4,5,6,7,8,9],[..],.......] # upwards of 10000 entries

def mcountb():
    for item in x:
        b = item[:]; b.sort(); bc = 0
        for bitem in b: bc += int(bitem)
        try: m = jc[bc]
        except: m = []
        if m.count(b) == 0:
             m.append(b); jc[bc]=m

def binm()
    for item in x:
        b = item[:]; b.sort(); bc = 0
        for bitem in b: bc += int(bitem)
        try: m = jc[bc]
        except: m = []
        if not b in m:
            m.append(b); jc[bc]=m



From grahn+nntp at snipabacken.dyndns.org  Sat Feb 25 13:58:31 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 25 Feb 2006 18:58:31 GMT
Subject: Path (graph) shower utility
References: <mailman.2338.1140685468.27775.python-list@python.org>
Message-ID: <slrne01a6j.2t1.grahn+nntp@frailea.sa.invalid>

On Wed, 22 Feb 2006 11:31:15 +0100, Durumdara <durumdara at gmail.com> wrote:
> Hi !
>
> I need to create a program that read eml file headers, analyze the 
                                       ^^^^^^^^
You mean "email". Took me some time to figure out.

> receive tags and create a path database. I finished with this program 
  ^^^^^^^^^^^^
You mean "the Recieved: headers". Also took some time to figure out.

> section.
>
> But I want to show a graphical summary about the paths.
>
> This is (what I want to show) like a graph - show ways, stations, etc, 
> and I want to show the strength of lines (how many of mails use this way).
>
> Can anyone known about a freeware tool, software, or python module that 
> can show graphs with best alignments ?

Sure. You want graphviz:

  http://www.research.att.com/sw/tools/graphviz/

It's primarily a tool for rendering a graph (in Postscript, PNG etc) from a
text representation, but IIRC there are Python bindings for it as well. Lots
of people use it for purposes similar to yours.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From skip at pobox.com  Tue Feb 21 10:00:07 2006
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 21 Feb 2006 09:00:07 -0600
Subject: Writing my own typing monitor program for RSI sufferers...
In-Reply-To: <558124520602202021x203786b5u552f20b0186e7b05@mail.gmail.com>
References: <1140491147.433293.164700@g43g2000cwa.googlegroups.com>
	<17402.37025.170658.197027@montanaro.dyndns.org>
	<558124520602202021x203786b5u552f20b0186e7b05@mail.gmail.com>
Message-ID: <17403.10999.384426.74910@montanaro.dyndns.org>


    > So,  so close....  The  problem  with this  implementation is  that it
    >  doesn't  monitor usb keyboards under   linux at all   as far as I can
    > tell....since no keyboard entry  will show up in /proc/interrupts with
    > a usb keyboard.  I absolutely need the keyboard monitoring as well.

    Sam's> Otherwise, your project would be the perfect starting point for me!

Hmmm...  I'm confused.  It is a starting point, just not one that monitors
USB keyboards.  A "perfect" starting point would be one in which you didn't
need to make any changes.  Why throw the baby out with the bath water?  Why
not just rewrite check_linux_interrupts to somehow watch the usb keyboard as
well (however that might be done)?  It's not going to be any more difficult
to check for USB keyboard interrupts in this project than in some other and
it already has a more-or-less functional user interface and support for
Windows.

Skip


From sridharinfinity at gmail.com  Thu Feb  9 07:02:00 2006
From: sridharinfinity at gmail.com (Sridhar Ratna)
Date: 9 Feb 2006 04:02:00 -0800
Subject: LovePython
Message-ID: <1139486520.524251.260490@o13g2000cwo.googlegroups.com>

http://www.lovepython.com/ (a reaction to loveperl.com)

This is going to be a weekend project for me. Development not yet
started. Still looking for good ideas! I welcome your suggestions.

--
Sridhar Ratna | srid at 24dot1.com | http://www.24dot1.com



From benji at benjiyork.com  Thu Feb 23 16:33:08 2006
From: benji at benjiyork.com (Benji York)
Date: Thu, 23 Feb 2006 16:33:08 -0500
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <dtl9ad$35h$1@sea.gmane.org>
References: <dtl9ad$35h$1@sea.gmane.org>
Message-ID: <43FE2A14.5070609@benjiyork.com>

Paul Probert wrote:
 > Hi, My app runs in a loop looking for changes in a database, and like
 > a good boy I call time.sleep(1) inside the loop. Unfortunately this
 > sometimes runs for 200 seconds or so, presumably while my OS is
 > calling Bill Gates to tell him what I've been doing. This happens
 > under NT4, W2k, and XP. What do people do to fix this? Thanks!

 From the docs for time.sleep:

     The actual suspension time may be less than that requested because
     any caught signal will terminate the sleep() following execution of
     that signal's catching routine. Also, the suspension time may be
     longer than requested by an arbitrary amount because of the
     scheduling of other activity in the system.
--
Benji York


From joanmikel at gmail.com  Thu Feb  9 06:20:03 2006
From: joanmikel at gmail.com (Shanon)
Date: Thu, 9 Feb 2006 03:20:03 -0800 (PST)
Subject: Thread Dump of a python process
Message-ID: <2840609.post@talk.nabble.com>


Hi,

I would to know if there're some way to have a dump of all the threads
started by a python process. I want to see the TID corresponding of each
thread because I need them to get the CPU time of each thread by the command
top.

Thanks
--
View this message in context: http://www.nabble.com/Thread-Dump-of-a-python-process-t1089322.html#a2840609
Sent from the Python - python-list forum at Nabble.com.



From onurb at xiludom.gro  Mon Feb 13 13:25:35 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Mon, 13 Feb 2006 19:25:35 +0100
Subject: Location of Python modules
In-Reply-To: <1139854184.504114.46690@z14g2000cwz.googlegroups.com>
References: <1139854184.504114.46690@z14g2000cwz.googlegroups.com>
Message-ID: <43f0cf3c$0$1712$636a55ce@news.free.fr>

Byte wrote:
> Pretty much self explanatry, where are Python modules stored in Linux?
> (i.e. in /usr/bin/local, or where?)
> 
Depends on how you installed Python (or how your distro package system
installed it). But it's usually in $PREFIX/lib/pythonX.X , with $PREFIX
being one of /usr or /usr/local (third-part modules being in the
site-packages subdirectory).

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From mcbooczech at gmail.com  Mon Feb 13 01:16:28 2006
From: mcbooczech at gmail.com (mcbooczech at gmail.com)
Date: 12 Feb 2006 22:16:28 -0800
Subject: Newbie
References: <v3JHf.2731$lo3.2501@trnddc07>
	<43ef6433$0$25387$636a55ce@news.free.fr>
	<HZJHf.2737$lo3.1139@trnddc07>
Message-ID: <1139811387.959091.136150@g44g2000cwa.googlegroups.com>

For me (I am newbie as well) was following link very useful:
http://benyoonline.com/pqr/PQR2.4.html

Good luck with Python

Petr Jakes



From claudio.grondi at freenet.de  Sat Feb 25 18:36:32 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Sun, 26 Feb 2006 00:36:32 +0100
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <dtn5l2$nhr$1@newsreader3.netcologne.de>
References: <dtl9ad$35h$1@sea.gmane.org> <dtlat7$80c$1@sea.gmane.org>
	<mailman.2376.1140733288.27775.python-list@python.org>
	<dtljre$f8i$1@newsreader3.netcologne.de>
	<dtn5l2$nhr$1@newsreader3.netcologne.de>
Message-ID: <dtqpkl$kbo$1@newsreader3.netcologne.de>

Claudio Grondi wrote:
> Claudio Grondi wrote:
> 
>> Paul Probert wrote:
>>
>>> Peter Hansen wrote:
>>>
>>>> Are you saying that you believe the time.sleep(1) call is actually 
>>>> blocking for 200 seconds?
>>
>> With such rare occurrence it is very hard to tell what is going on. 
>> Usually I put such strange things on a list of curiosities I don't 
>> want to know the reason of, because it is in my eyes not worth the 
>> effort. Maybe it is even a common problem not yet detected by me, 
>> because I have never run this kind of tests for such a long time.
>> Starting today, I can tell you statistically not earlier than in one 
>> week, if I have the same problem on my machines (currently I am 
>> running only one or two at the same time).
> 
> 
> Here the intermediate results on my Windows XP machine connected to the 
> Internet via very fast digital phone line connection (network 
> card/digital-converter box/phone-line):
> 
> dt= 1.125          time= 2006_02_24_11h_36m_15s
> dt= 9.20200014114  time= 2006_02_24_12h_46m_49s
> dt= 1.18799996376  time= 2006_02_24_14h_43m_32s
> 
> The code used:
> """
> import time
> while True:
>   oldtime=time.time()
>   time.sleep(1.0)
>   newtime=time.time()
>   dt=newtime-oldtime
>   if dt > 1.1:
>     print 'dt=',dt,' time=',time.strftime('%Y_%m_%d_%Hh_%Mm_%Ss')
> """
> running in a command line console parallel to usual daily business on 
> the computer.
> 
> The yesterday night run (5 hours) gave max. 1.125 sec., so I am 
> surprized to see the 9 seconds already after only two hours today.
> 
> Claudio

The 9.2 seconds difference was also because of time synchronization 
Windows XP does using time.windows.com server - it reported to be done 
last time 2006-02-24 at 12:46 o'clock i.e. exactly at the same time 
where the 9.2 delay occurred.

Claudio


From bignose+hates-spam at benfinney.id.au  Tue Feb 28 19:59:55 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 01 Mar 2006 11:59:55 +1100
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>
	<873bi4z4w6.fsf@rose.polar.local> <7x7j7gjly8.fsf@ruckus.brouhaha.com>
Message-ID: <874q2j3rp0.fsf@rose.polar.local>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
> Do you anticipate having parameters like socket.AF_INET that are
> currently integers, become enumeration members in future releases?

That, and the 're' flags referred to earlier, seems to be a good
application of enumerations.

-- 
 \     "Jealousy: The theory that some other fellow has just as little |
  `\                                      taste."  -- Henry L. Mencken |
_o__)                                                                  |
Ben Finney


From lycka at carmen.se  Thu Feb  2 08:05:35 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 02 Feb 2006 14:05:35 +0100
Subject: Test driven programming, was Re: VB to Python migration
In-Reply-To: <1138805691.431379.250290@z14g2000cwz.googlegroups.com>
References: <DjyCf.110918$AP5.12355@edtnps84>
	<1138421531.231633.41140@z14g2000cwz.googlegroups.com>
	<drj04s$7c6$1@wake.carmen.se>
	<1138566539.478552.113180@g49g2000cwa.googlegroups.com>
	<drlckk$ete$1@wake.carmen.se> <KPtDf.150306$AP5.92261@edtnps84>
	<drnd3j$s4d$1@wake.carmen.se> <rlSDf.148748$6K2.76617@edtnps90>
	<drq3r2$qmu$1@wake.carmen.se>
	<1138805691.431379.250290@z14g2000cwz.googlegroups.com>
Message-ID: <drt031$b9f$1@wake.carmen.se>

First of all, while I use TextTest, I'm fortunate to be surrounded
by TextTest experts such as Goeff and Johan here at Carmen, so I'm
not a TextTest expert by any measure. I probably use it in an non-
optimal way. For really good answers, I suggest using the mailing
list at sourceforge:
http://lists.sourceforge.net/lists/listinfo/texttest-users

For those who don't know, TextTest is a testing framework which
is based on executing a program under test, and storing all
output from such runs (stdout, sterr, various files written
etc). On each test run, the output is compared to output which is
known to be correct. When there are differences, you can inspect
these with a normal diff tool such as tkdiff. In other words,
there are no test scripts that perform actual and expected values,
but there might be scripts for setting up, extracting results and
cleaning up.

Grig Gheorghiu wrote:
> I've been writing TextTest tests lately for an application that will be
> presented at a PyCon tutorial on "Agile development and testing". I
> have to say that if your application does a lot of logging, then the
> TextTest tests become very fragile in the presence of changes. So I had
> to come up with this process in order for the tests to be of any use at
> all:

The TextTest approach is different from typical unittest work,
and it takes some time to get used to. Having worked with it
for almost a year, I'm fairly happy with it, and feel that it
would mean much more work do achieve the same kind of confidence
in the software we write if would use e.g. the unittest module.
YMMV.

> 1) add new code in, with no logging calls
> 2) run texttest and see if anything got broken
> 3) if nothing got broken, add logging calls for new code and
> re-generate texttest golden images

I suppose its usefulness depends partly on what your application
looks like. We've traditionally built applications that produce
a lot of text files which have to look in a certain way. There are
several things to think about though:

We use logging a lot and we have a clear strategy for what log
levels to use in different cases. While debugging we can set a
high log level, but during ordinary tests, we have a fairly low
log level. What log messages gets emitted is controlled by an
environment variable here, but you could also filter out e.g.
all INFO and DEBUG messages from your test comparisions.

We're not really interested in exactly what the program does when
we test it. We want to make sure that it produces the right results.
As you suggested, we'll get lots of false negatives if we log too
much details during test runs.

We filter out stuff like timstamps, machine names etc. There are
also features that can be used to verify that texts occur even if
they might appear in different orders etc (I haven't meddled with
that myself).

We don't just compare program progress logs, but make sure that
the programs produce appropriate results files. I personally don't
work with any GUI applications, being confined in the database
dungeons here at Carmen, but I guess that if you did, you'd need
to instrument your GUI so that it can dump the contents of e.g.
list views to files, if you want to verify the display contents.

Different output files are assigned different severities. If
there are no changes, you get a green/green result in the test
list. If a high severity file (say a file showing produced
results) differ, you get a red/red result in the test list.
If a low severity file (e.g. program progress log or stderr)
changes, you get a green/red result in the test list.

You can obviously use TextTest for regression testing legacy
software, where you can't influence the amount of logs spewed
out, but in those cases, it's probable that the appearence of
the logs will be stable over time. Otherwise you have to fiddle
with filters etc.

In a case like you describe above, I could imagine the following
situation. You're changing some code, and that change will add
some new feature, and as a side effect change the process (but
not the results) for some existing test. You prepare a new test,
but want to make sure that existing tests don't break.

For your new test, you have no previous results, so all is red,
and you have to carefully inspect the files that describe the
generated results. If you're a strict test-first guy, you've
written a results file already and with some luck it's green,
or just have some cosmetic differences that you can accept. You
look at the other produced files as well and see that there
are no unexpected error messages etc, but you might accept the
program progress log without caring too much over every line.

For your existing tests, you might have some green/red cases,
where low severity files changed. If there are red/red test
cases among the existing tests, you are in trouble. Your new
code has messed up the results of other runs. Well, this
might bee expected. It's all text files, and if it's hundreds
of tests, you can write a little script to verify that the
only thing that changed in these 213 result files was that a
date is formatted differently or whatever. In a more normal
case, a handful of tests have a few more lines (maybe repeated
a number of times) in some progress logs, and it's quick to
verify in the GUI that this is the only change. As you suggested,
you might also raise the log level for this particular log
message for the moment, rerun the tests, see that the green/red
tunred to green/green, revert to log levels, rerun again, and
save all the new results as correct.

> I've been doing 3) pretty much for a while and I find myself
> regenerating the golden images over and over again. So I figured that I
> won't go very far with this tool without the discipline of going
> through 1) and 2) first.

If you want this it migh be convenient to write something like

LOGLEVEL_NEW=1
...
log(LOGLEVEL_NEW, 'a new log message')
...
log(LOGLEVEL_NEW, 'another new log message')
...

and then remove the first assignment and replace all LOGLEVEL_NEW
with DEBUG or whatever after the first green test.

It's also worth thinking about how much logging you want during
tests. Do you want to see implementation changes that don't cause
changed results? You are verifying the achieved results properly
in some kind of snapshot or output files, right?

>>From what I see though, there's no way I can replace my unit tests with
> TextTest. It's just too coarse-grained to catch subtle errors. I'm
> curious to know how exactly you use it at Carmen and how you can get
> rid of your unit tests by using it.

I work in the database group at Carmen R&D, and a big part of our job
is to provide APIs for the applications to use when working with
databases. Thus, we typically test our APIs rather than full programs.
This means that we need to write test programs, typically in Python,
that use the API, and present appropriate results.

The way we work in those cases isn't very different from typical unit
testing. We have to write test scripts (since the *real* program
doesn't exist) and we have to make the test scripts produce a
predictable and reproducable output. This isn't different from what
you do in unittest. If you can use .assertEqual() etc, you can also
get output to a file which is reproducable. For us, who mainly work
with content in databases, the typical thing for use to verify is that
one or several tables hold a particular content after a particular
set of operations. The easiest way to verify that is to dump the results
of one or several DB queries to text files, and to compare the files.
Typically, the files are identical, and if there is a difference, we
can directly see the difference between the files with tkdiff. This
is far superior that just writing typical unittest modules where we'd
perform a certain query and get a message that this particular query
gave the wrong result, but I don't get a chance to see any context.
Tkdiff on dumps of small tables is very informative.

It's also easier when the expected result changes. I can usually see
fairly easy in tkdiff that the new result differs from the old just
in the way I expected, and save the new result as the correct result
to compare with. One has to be very careful here of course. If you're
in a hurry and don't inspect everything properly, you could save an
incorrect result as correct, and think that your flawed program works
as intended. It might be less likely that you would write an incorrect
assertion in unittest and make the program produce this incorrect
result.

This is a fundamental difference between unittest and the way *I* use
texttest. With unittest, you state your expected results before the
test, and mechanically verify that this is correct. With TextTest, you
*could* do the same, and change the text file with expected results to
what you now think it should be. I'm usually too lazy for that though.
I just change my code, rerun the test, expect red, look at the
difference in tkdiff, determine whether this is what it should look
like, and save the new results as correct if I determine that it is.

So far, this hasn't led to any problems for me, and it's far less work
than to manually write all the assertions. TextTest (particularly in
the mature setup here) also provides support for distribution of tests
among hosts, on different operating systems, with different database
systems etc, automatic test execution as part of nightly builds etc.

TextTest originated among our optimization experts. As far as I know,
they use it more as it is intended than we do, i.e. to test complete
programs, rather than small scripts written just to check a feature in
an API. Honestly, I don't know a lot of details there though. They
seem to practice XP fairly strictly, but instead of writing unit tests,
they test the entire programs in TextTest, and they obviously manage
to produce world class software in an efficient way. As I said, I'm
not the expert...


From sbaush at gmail.com  Thu Feb 23 03:39:58 2006
From: sbaush at gmail.com (Sbaush)
Date: Thu, 23 Feb 2006 09:39:58 +0100
Subject: Fail in sending UDP packet
Message-ID: <fc5d4c490602230039lc993e02x@mail.gmail.com>

Hi all. I've attached my SendReceive class. I have e a big problem!
My program create a packet, then call the send function to send this. the
first time the packet is not sent, then it works perfectly!
WHY??? Have you idea??

--
Sbaush
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From apgwoz at gmail.com  Tue Feb  7 07:45:47 2006
From: apgwoz at gmail.com (Andrew Gwozdziewycz)
Date: Tue, 7 Feb 2006 07:45:47 -0500
Subject: Natural Language Date Processing.
Message-ID: <6F26468B-312A-48D9-B39D-198005C785A2@gmail.com>

I've been looking recently for date processing modules that can parse  
dates in forms such as
"next week" or "6 days from next sunday".  PHP has a function that  
will do this called 'strtotime',
but I have not found a Python implementation. I've check the standard  
date, datetime and time
modules and also mx.Date* modules. Am I overlooking something here or  
does it not exist?
Anyone know of an implementation? Also, I realize that this is  
perhaps very English specific
so I apologize to any non-native English speakers.

---
Andrew Gwozdziewycz
apgwoz at gmail.com
http://ihadagreatview.org
http://plasticandroid.org




From steve at holdenweb.com  Tue Feb 21 23:09:14 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 21 Feb 2006 23:09:14 -0500
Subject: a little more help with python server-side scripting
In-Reply-To: <59edncmGm6g2LmbeRVn-pw@rcn.net>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
Message-ID: <dtgo5a$87u$1@sea.gmane.org>

John Salerno wrote:
> I contacted my domain host about how Python is implemented on their 
> server, and got this response:
> 
> -------------------
> Hello John,
> 
> Please be informed that the implementation of python in our server is 
> through mod_python integration with the apache.
> 
> These are the steps needed for you to be able to run .py script directly 
> from browser for your webpage:
> 
> 1. Please use the below mentioned path for python:
> #!/usr/bin/env python
> 
> Furthermore, update us with the script path, so that we can set the 
> appropriate ownership and permissions of the script on the server.
> 
> If you require any further assistance, feel free to contact us.
> -----------------------
> 
> Unfortunately, I don't completely understand what it is I need to do 
> now. Where do I put the path they mentioned? And what do they mean by my 
> script path?

Don't worry, it looks as though they don't completely understand either :-)

Fortunately they've given you the information you need to run CGI
scripts. Try installing this script in your cgi-bin directory as test.py 
(you may have to set it executable):

#!/usr/bin/env python
#
import os
print "Content-Type: text/plain"
print
for t in os.environ.items():
     print "%s=%s" % t

If it runs when you access http://yourdomain/cgi-bin/test.py it looks 
like you're good to go!

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From rphillips at engineer.co.summit.oh.us  Wed Feb 15 08:05:02 2006
From: rphillips at engineer.co.summit.oh.us (paron)
Date: 15 Feb 2006 05:05:02 -0800
Subject: Embedding an Application in a Web browser
References: <1139930045.408507.151440@g43g2000cwa.googlegroups.com>
	<1140004056.893486.291280@g44g2000cwa.googlegroups.com>
Message-ID: <1140005817.698597.135220@z14g2000cwz.googlegroups.com>

I forgot -- I like the idea of Kerrigell, too. It runs on top of
CherryPy, and lets you use python either in the server (which is just a
little program on your local machine) or embedded in the html pages, or
in a Kerrigell service, which is an application server based on Python.

So, a script to print the squares of numbers from 1 to 9 looks like:

Python script +++++++++

print "<h1>Squares</h1>"
for i in range(10):
    print "%s :<b>%s</b>" %(i,i*i)


Karrigell service ++++++++

def index():
    print "<h1>Squares</h1>"
    for i in range(10):
        print "%s :<b>%s</b>" %(i,i*i)

HTML Inside Python +++++++

"<h1>Squares</h1>"
for i in range(10):
    "%s :<b>%s</b>" %(i,i*i)

Python Inside HTML +++++++

<h1>Squares</h1>
<%
for i in range(10):
    print "%s :<b>%s</b>" %(i,i*i)
%>

It's certainly flexible.

As far as your animated shapes go, you have a number of unattractive
options!

    Flash (my preference, if you already have the authoring software,)
    openLazslo (maybe the best bet for free),
    SVG (which requires a plug-in for IE,) or
    creating them and making them interactive with Javascript ( see
http://www.walterzorn.com/jsgraphics/jsgraphics_e.htm )

Ron



From kenneth.s.chan at gmail.com  Fri Feb 17 17:50:22 2006
From: kenneth.s.chan at gmail.com (Kenny)
Date: 17 Feb 2006 14:50:22 -0800
Subject: Python Oracle Interace on Solaris
In-Reply-To: <mailman.2060.1140194168.27775.python-list@python.org>
References: <78E6A2FC276AD8428A8E2DBBB540855E038A0B7F@NYOBGCEXMB21.uswin.ad.vzwcorp.com>
	<mailman.2060.1140194168.27775.python-list@python.org>
Message-ID: <1140216622.537022.159850@g44g2000cwa.googlegroups.com>

Thanks... Im not sure if you would know how to solve this one, but when
I ran my setup python scripts I got the error: library -lclntsh not
found. In the instantclient folder the library exists... is this a
matter of just copying the libraries to a different spot or just
setting up the correct environment variables?



From sw at wordtech-software.com  Sat Feb 11 12:00:07 2006
From: sw at wordtech-software.com (Kevin Walzer)
Date: Sat, 11 Feb 2006 12:00:07 -0500
Subject: Yet another GUI toolkit question...
In-Reply-To: <mailman.1743.1139664790.27775.python-list@python.org>
References: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
	<mailman.1743.1139664790.27775.python-list@python.org>
Message-ID: <43EE1817.7050702@wordtech-software.com>

Chris Mellon wrote:

> 
> If you're planning on selling an application, especially to OS X
> users, then Tk is absolutely out of the question. It doesn't have even
> the slightest resemblence to native behavior, and lacks the polish and
> flash that occasionally lets a non-native app get away with it. Given
> the limits you've stated, I believe your only options are wxPython and
> writting 2 guis using PyWin/PyObjC. The second option requires
> knowledge of the native tool sets for the respective platforms, so if
> you don't have that I can only suggest wxPython. If you're used to Tk
> you will face a learning curve, and you will need to look for or write
> replacements for the custom widgets you've been using.
> 

Do these screenshots look "non-native" to you?

http://www.wordtech-software.com/ireveal-mac.png
http://www.wordtech-software.com/ireveal-windows.png
http://www.wordtech-software.com/ireveal-linux.png

This application was developed in Tcl/Tk.

I think Tkinter is lagging behind Tk itself in terms of its advances
with theming and native look and feel, especially on OS X and Win XP.
Certainly a lot of Python developers don't seem well-informed about the
work that has been done to bring Tk back into the modern age. The
wrappers I mentioned above (some at a site that is offline but should be
back online shortly, I'm told) are bleeding-edge in Tkinter terms but
reflect work that started a couple of years ago in Tk. (The extension is
called "Tile" and will be part of the Tk core when it's released at v. 8.5).

That doesn't mean wxPython is out of the question. What I'm trying to
figure out is whether I will be up and running faster with Tkinter +
Tile (leaving me mainly to improve my proficiency with Python itself and
translate Tk into a Python idiom) or whether I should learn wxPython,
with its vastly different GUI paradigm, as well as Python.

If Tkinter + Tile + Bwidgets + Tablelist does the job, as I think it may
(and as it does with regular Tcl/Tk), then I will probably stick with
that. And perhaps I can then contribute some documentation somewhere on
how to use the Tile widgets in a Tkinter application, complete with
screen shots and working code for others to use. Such documentation is
sorely lacking right now.

The vast range of available GUI toolkits is one thing that partially
offsets Python's many virtues as a programming language. I realize I was
stepping into a fire swamp by even broaching the question. However, the
application I'm envisioning (accessing web services from a desktop GUI)
will benefit from the abundant Python libraries/wrappers that have
already been written, which are mostly lacking (or which would require
me to roll my own) in Tcl.


-- 
Kevin Walzer
iReveal: File Search Tool
http://www.wordtech-software.com


From gaz082 at gmail.com  Wed Feb 15 18:53:11 2006
From: gaz082 at gmail.com (Gaz)
Date: 15 Feb 2006 15:53:11 -0800
Subject: Attached images by plain email.
In-Reply-To: <1140043677.756437.315080@g14g2000cwa.googlegroups.com>
References: <1140037314.129890.135970@o13g2000cwo.googlegroups.com>
	<1140043677.756437.315080@g14g2000cwa.googlegroups.com>
Message-ID: <1140047591.131312.242680@g44g2000cwa.googlegroups.com>

You are the man!



From jack at performancedrivers.com  Tue Feb 14 11:49:49 2006
From: jack at performancedrivers.com (Jack Diederich)
Date: Tue, 14 Feb 2006 11:49:49 -0500
Subject: how do you pronounce 'tuple'?
In-Reply-To: <1f7befae0602140740s5c1abdfdh85618233dbaa68b6@mail.gmail.com>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<11v032ii4gvik72@corp.supernews.com>
	<1139816300.706181.79250@f14g2000cwb.googlegroups.com>
	<1f7befae0602140740s5c1abdfdh85618233dbaa68b6@mail.gmail.com>
Message-ID: <20060214164949.GF6479@performancedrivers.com>

On Tue, Feb 14, 2006 at 10:40:09AM -0500, Tim Peters wrote:
>
> the-acid-test-is-whether-you-say-"xor"-with-one-syllable-or-three-ly y'rs  - tim

"Zorr!" of course.  
Saying "All hail the mighty Exclusive Or!" would just sound silly.

-jackdied


From petite.abeille at gmail.com  Mon Feb 13 01:40:42 2006
From: petite.abeille at gmail.com (PA)
Date: Mon, 13 Feb 2006 07:40:42 +0100
Subject: Is python very slow compared to C
In-Reply-To: <1139809484.447810.17000@g44g2000cwa.googlegroups.com>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
	<1139754010.067582.214830@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>
	<mailman.1785.1139762698.27775.python-list@python.org>
	<pan.2006.02.12.17.18.50.356928@REMOVETHIScyber.com.au>
	<1139793721.739325.235780@z14g2000cwz.googlegroups.com>
	<43F01749.2000601@REMOVEMEcyber.com.au>
	<1139809484.447810.17000@g44g2000cwa.googlegroups.com>
Message-ID: <6483a07172cad4052d478999d11db730@gmail.com>


On Feb 13, 2006, at 06:44, bonono at gmail.com wrote:

> And if we use market penetration as measure, Perl seems to be easier
> for people ?

Perl: Shell scripts/awk/sed are not enough like programming languages.

Python: Perl is a kludge.

"What Languages Fix"
http://www.paulgraham.com/fix.html

Cheers

--
PA, Onnay Equitursay
http://alt.textdrive.com/



From claird at lairds.us  Sun Feb 26 19:08:22 2006
From: claird at lairds.us (Cameron Laird)
Date: Mon, 27 Feb 2006 00:08:22 GMT
Subject: Is Python a Zen language?
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
	<1140878147.541074.233540@i40g2000cwc.googlegroups.com>
	<1140879469.853398.322850@i40g2000cwc.googlegroups.com>
	<1140903119.580735.108440@e56g2000cwe.googlegroups.com>
Message-ID: <eer9d3-81t.ln1@lairds.us>

In article <1140903119.580735.108440 at e56g2000cwe.googlegroups.com>,
Kay Schluehr <kay.schluehr at gmx.net> wrote:
			.
			.
			.
>Lucid in the mid 80s that gone down a few years later. As it turned out
>that time Lisp was not capable to survive in what we call today a
>"heterogenous environment". It was strongly too self-centered. So I
			.
			.
			.
Smalltalk, too.  And, in a different way, Pascal.

One of Guido's explicit goals from the beginning of
Python was that it would play nicely with the outside
world.


From claudio.grondi at freenet.de  Tue Feb 14 20:05:34 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Wed, 15 Feb 2006 02:05:34 +0100
Subject: Python equivilant to msgbox()
In-Reply-To: <3buIf.32386$lo3.16580@trnddc07>
References: <7CQHf.2690$7C3.1780@trnddc08> <43efd40a$1_2@newspeer2.tds.net>
	<6WQHf.2700$7C3.2665@trnddc08>
	<dsq6oc$lb8$1@newsreader3.netcologne.de>
	<3buIf.32386$lo3.16580@trnddc07>
Message-ID: <dstup1$rm$1@newsreader3.netcologne.de>

LittlePython wrote:
> I am no VB programmer just dabble in vbscripting abit. The only one I am
> aware of is the popup as self closing. I never thought of using com.
Ok, so my remarks about COM were not for you.
> 
> Do you know of any thing for a busy box in the same vain as easygui
No, I don't, but it doesn't mean, that there is none considering myriads 
of various available COM components. My idea was to make you aware, that 
you can use your VB compiler for creating any ActiveX/COM components for 
usage with Python the way I have described, but as you write it seems 
not to be an option for you.

So I have to admit, that EasyGUI is in your case apparently
>>> exactly what you was looking for ...

:-)

Claudio
> 
> 
> "Claudio Grondi" <claudio.grondi at freenet.de> wrote in message
> news:dsq6oc$lb8$1 at newsreader3.netcologne.de...
> 
>>LittlePython wrote:
>>
>>>That is exactly what I was look for .. thx
>>
>>Surprised to hear that.
>>
>>As VisualBasic programmer I would expect you to have experience with
>>ActiveX on Windows, where the best way to go with Python is to reuse all
>>the ActiveX components and their known user interfaces (i.e. constants
>>to use as parameter and constants for interpretation of return values)
>>directly from within Python.
>>
>>A message box goes e.g. this way:
>>
>> >>> import win32com.client
>> >>> axWshShell = win32com.client.Dispatch("WScript.Shell")
>> >>> axWshShell.Popup(u"(MsgText)This axWshShell.Popup closes itself
>>after 45 seconds", 45, u"(MsgTitle)Testing WScript.Shell object:", 1)
>>
>>By the way: is there a ready for direct use timed self closing Ok/Cancel
>>message box in any of the proposed GUI packages?
>>
>>Claudio
>>
>>>
>>>"Kent Johnson" <kent at kentsjohnson.com> wrote in message
>>>news:43efd40a$1_2 at newspeer2.tds.net...
>>>
>>>
>>>>LittlePython wrote:
>>>>
>>>>
>>>>>Is there an equivalent to a msgbox() or wscript.echo (via wcsript) . I
>>>>>would like to call this instead of print (to the screen) . I would like
>>>>>to write a simple script that is not an event drive gui but calls input
>>>>>boxes, message boxes, or maybe even a file open browser box as well?
>>>>
>>>>Take a look at EasyGUI:
>>>>http://www.ferg.org/easygui/
>>>>
>>>>Kent
>>>
>>>
>>>
> 
> 


From xah at xahlee.org  Tue Feb 14 04:33:49 2006
From: xah at xahlee.org (Xah Lee)
Date: 14 Feb 2006 01:33:49 -0800
Subject: Xah's Edu Corner: accountability & lying thru the teeth
In-Reply-To: <1137784561.589887.58380@o13g2000cwo.googlegroups.com>
References: <1133844932.007824.26780@g43g2000cwa.googlegroups.com>
	<1134780763.066592.45390@g49g2000cwa.googlegroups.com>
	<1135405908.381150.133190@o13g2000cwo.googlegroups.com>
	<1136236586.734775.212440@f14g2000cwb.googlegroups.com>
	<1137784561.589887.58380@o13g2000cwo.googlegroups.com>
Message-ID: <1139909629.798938.284160@g47g2000cwa.googlegroups.com>

here's a site: http://www.longbets.org/bets that takes socially
important predictions. I might have to enter one or two.

i longed for such a accountable predictions for a long time. Usually,
some fucking fart will do predictions, but the problem is that it's not
accountable. So, lots fuckhead morons in the IT industry will shout
about their opinions on society and technology such as for example
?Microsoft will fall within a decade? or ?linux will rule?, or
some technology issues such as ?singularity?. But the problem is,
any moron can sound big when there's no accountability associated with
their cries. This website, at least makes it possible to do accountable
opinions. (in the form of mandatory monetary donations) But i really
wished for a mechanism, so that any fuckhead tech geekers with their
loud cries will hurt badly when they open their mouths in public with
wantonness.

For more info about the longbets.org site, see:
http://en.wikipedia.org/wiki/Long_Now_Foundation

   Xah
   xah at xahlee.org
 ? http://xahlee.org/



From cyberco at gmail.com  Sat Feb 25 07:08:06 2006
From: cyberco at gmail.com (cyberco)
Date: 25 Feb 2006 04:08:06 -0800
Subject: Import in a separate thread
Message-ID: <1140869286.548125.17710@p10g2000cwp.googlegroups.com>

I want to import a long list of modules in a separate thread to speed
things up. How can I make the modules imported in that separate thread
accessible outside the method?

===========================
import os

# import rest in a separate thread
def importRest():
    import audio
    import socket
thread.start_new_thread(importRest,())

# audio.somemethod()  would fail here
===========================



From johnjsal at NOSPAMgmail.com  Fri Feb 24 16:18:55 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 24 Feb 2006 21:18:55 GMT
Subject: a little more help with python server-side scripting
In-Reply-To: <1140812064.391888.104730@v46g2000cwv.googlegroups.com>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<dSoLf.1663$No6.38996@news.tufts.edu> <dtmhot$4t4$1@wake.carmen.se>
	<nTELf.1667$No6.38886@news.tufts.edu>
	<43ff1d75$1_1@newspeer2.tds.net>
	<xNFLf.1672$No6.39067@news.tufts.edu> <dtnbjp$va6$1@wake.carmen.se>
	<clILf.1673$No6.38927@news.tufts.edu>
	<1140812064.391888.104730@v46g2000cwv.googlegroups.com>
Message-ID: <3LKLf.1675$No6.39049@news.tufts.edu>

Paul Boddie wrote:

> To sum up:
> 
>  1. Copy the three line "CGI with Python" example, save it as
>     yourfile.py, upload it, test it. If it works, celebrate and move
>     on to step 2. If it doesn't, move on to step 2 anyway. ;-)
> 
>  2. Copy the Web page example from the Microsoft link, save it
>     as yourfile.asp and also as yourfile.html, upload them, test
>     them. If one of them works, celebrate and note down whether
>     you should be using .asp or .html on the end of your filenames.
>     If both of them work, celebrate more vigorously! If neither work,
>     try and tell us what went wrong.

Thank you. I'm going to study your response and give it all a try!  :)


From lycka at carmen.se  Wed Feb  8 11:24:52 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 08 Feb 2006 17:24:52 +0100
Subject: What editor shall I use?
In-Reply-To: <1139412493.264154.38230@g44g2000cwa.googlegroups.com>
References: <1139410110.389122.215400@z14g2000cwz.googlegroups.com>
	<dsd0s6$1sps$1@boco.fee.vutbr.cz>
	<1139412493.264154.38230@g44g2000cwa.googlegroups.com>
Message-ID: <dsd60m$1dv$1@wake.carmen.se>

Lad wrote:
> I did not find where I can set encoding type in vim

Google is your friend.

http://vim.sourceforge.net/scripts/script.php?script_id=789
http://www.vim.org/tips/tip.php?tip_id=246
http://www.vim.org/htmldoc/mbyte.html


From fredrik at pythonware.com  Sun Feb 12 09:54:47 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 12 Feb 2006 15:54:47 +0100
Subject: Tracking down memory leaks?
References: <1139749861.949765.282310@z14g2000cwz.googlegroups.com>
	<1139752915.618372.325450@o13g2000cwo.googlegroups.com>
Message-ID: <dsni7o$8hu$1@sea.gmane.org>

"dmsbox2000-list1 at yahoo.com" wrote:

> I'm not an expert on python internals, and it is possible that they
> have a way of checking for cases like this.   I think the deepcopy
> method catches this, but I don't *think* basic garbage collection look
> for this sort of thing.

http://www.python.org/doc/faq/general.html#how-does-python-manage-memory

</F>





From johan at pulp.se  Wed Feb  1 05:31:38 2006
From: johan at pulp.se (Johan Lindberg)
Date: 1 Feb 2006 02:31:38 -0800
Subject: wxPython Conventions
In-Reply-To: <1138784799.435953.251980@g43g2000cwa.googlegroups.com>
References: <1138684467.864196.212400@f14g2000cwb.googlegroups.com>
	<1138784799.435953.251980@g43g2000cwa.googlegroups.com>
Message-ID: <1138789898.121989.83990@f14g2000cwb.googlegroups.com>


Iain King skrev:

> How do you gain access to the system tray?

Use wx.TaskBarIcon.
See http://wiki.wxpython.org/index.cgi/FlashingTaskbarIcon for
snippets.

/Johan



From aleaxit at yahoo.com  Wed Feb  1 23:22:04 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Wed, 1 Feb 2006 20:22:04 -0800
Subject: nDimensional sparse histogram in python.
References: <1138848672.791908.90050@g44g2000cwa.googlegroups.com>
	<1ha3gff.u4comocxo4ddN%aleaxit@yahoo.com>
	<1138849589.663600.301610@z14g2000cwz.googlegroups.com>
	<1ha3hrb.z9fahb1cxs03zN%aleaxit@yahoo.com>
	<1138852458.567178.116980@g43g2000cwa.googlegroups.com>
	<1138852979.060845.249440@g44g2000cwa.googlegroups.com>
	<1138853373.087911.167410@g14g2000cwa.googlegroups.com>
Message-ID: <1ha3kfx.8ndm2ia98xvtN%aleaxit@yahoo.com>

KraftDiner <bobrien18 at yahoo.com> wrote:

> Many thanks everyone.
> 
> One last quick question...
> The dictionary, I believe, is sorted by the key.

Dictionaries are NOT sorted -- they're hashtables.

> Is there a way to sort it by the value?
> Say I wanted to put out a list of the frequency sorted by highest to
> lowest?

import operator
for k, v in sorted(somedict, key=operator.itemgetter(1), reverse=1):
    print k, v

emits key/value pairs, one per line, for any dictionary sorted by
descending order of values.  Embellish to taste.


Alex


From durumdara at gmail.com  Wed Feb 22 05:31:15 2006
From: durumdara at gmail.com (Durumdara)
Date: Wed, 22 Feb 2006 11:31:15 +0100
Subject: Path (graph) shower utility
Message-ID: <43FC3D73.6020305@gmail.com>

Hi !

I need to create a program that read eml file headers, analyze the 
receive tags and create a path database. I finished with this program 
section.

But I want to show a graphical summary about the paths.

This is (what I want to show) like a graph - show ways, stations, etc, 
and I want to show the strength of lines (how many of mails use this way).

Can anyone known about a freeware tool, software, or python module that 
can show graphs with best alignments ?

Please help me. Thanx for it:
dd



From jimlewis at emachineshop.com  Fri Feb  3 06:25:03 2006
From: jimlewis at emachineshop.com (jimlewis at emachineshop.com)
Date: 3 Feb 2006 03:25:03 -0800
Subject: Server side newbie
References: <1138552847.103899.302880@g14g2000cwa.googlegroups.com>
	<mailman.1200.1138554129.27775.python-list@python.org>
Message-ID: <1138965903.883934.324570@g44g2000cwa.googlegroups.com>

Can you point me to sample code somewhere? If I had a server-side
python script that increments the number in an edit control on clicking
a button, I think I could take it from there.



From nibiery at hotmail.com  Mon Feb 20 18:01:24 2006
From: nibiery at hotmail.com (Ingrid)
Date: 20 Feb 2006 15:01:24 -0800
Subject: getting started, .py file
In-Reply-To: <mailman.2186.1140473000.27775.python-list@python.org>
References: <1140471172.783876.80400@g14g2000cwa.googlegroups.com>
	<mailman.2186.1140473000.27775.python-list@python.org>
Message-ID: <1140476484.581881.230170@o13g2000cwo.googlegroups.com>

Thanks everyone. That's exactly what I was looking for, but I still
can't seem to make it work. I've got the interpreter starting in
"C:\Program Files\Python2.4", and my code is in "C:\Documents and
Settings\Ingrid\My Documents". So, I did:
  import os
  os.chdir("C:\\Documents and Settings\\Ingrid\\My Documents")
  from mycode import *

and I get the error message:
Traceback (most recent call last):
  File "<pyshell#29>", line 1, in -toplevel-
    import mycode
ImportError: No module named mycode

I'm sure I'm missing something obvious again, but I don't see anything
in the import documentation about directories.

Ingrid



From paschott at no.yahoo.spamm.com  Mon Feb 13 17:58:45 2006
From: paschott at no.yahoo.spamm.com (Peter A. Schott)
Date: Mon, 13 Feb 2006 22:58:45 GMT
Subject: FTPlib
References: <1139842605.976288.243880@g14g2000cwa.googlegroups.com>
Message-ID: <5i32v19c23ai7lcvbkos3rtrlt3gf2su1b@4ax.com>

Shouldn't that be:

srcFtp.retrbinary('get ' + file[2:])

or some similar variation?

You're also missing a block telling this where to write the local file.

LocalFile = file.open(file[2:], "wb")
LocalFile.write(srcFtp.retrbinary('get ' + file[2:]) )

(or something similar)

-Pete

"Harlin Seritt" <harlinseritt at yahoo.com> wrote:

> Using ftplib from Python I am trying to get all files in a particular
> directory using ftplib and then send those same files to another ftp
> server. I have tried using commands like 'get *' and 'mget *' with no
> success.
> 
> I am using the following:
> 
> srcFtp = FTP(srcHost)
> srcFtp.login(srcUser, srcPass)
> srcDir = srcFtp.nlst('.')
> for file in srcDir:
>     print file[2:]
>     srcFtp.transfercmd('get '+file[2:])
> 
> I've verified that I do have a connection with the ftp server and the
> files as 'file[2:]' are indeed the file names.
> 
> Anyone know why I get the following error?
> 
> podcast-1.mp3
> Traceback (most recent call last):
>   File "podsync.py", line 17, in ?
>     srcFtp.transfercmd('get '+file[2:])
>   File "C:\Python24\lib\ftplib.py", line 345, in transfercmd
>     return self.ntransfercmd(cmd, rest)[0]
>   File "C:\Python24\lib\ftplib.py", line 327, in ntransfercmd
>     resp = self.sendcmd(cmd)
>   File "C:\Python24\lib\ftplib.py", line 241, in sendcmd
>     return self.getresp()
>   File "C:\Python24\lib\ftplib.py", line 216, in getresp
>     raise error_perm, resp
> ftplib.error_perm: 500 Syntax error, command unrecognized.
> 
> Thanks,
> 
> Harlin Seritt


From bignose+hates-spam at benfinney.id.au  Tue Feb 28 19:57:48 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 01 Mar 2006 11:57:48 +1100
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>
	<873bi4z4w6.fsf@rose.polar.local> <7x7j7gjly8.fsf@ruckus.brouhaha.com>
Message-ID: <87bqwr3rsj.fsf@rose.polar.local>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:

> say that 
>    Weekdays = enum('mon', 'tue', ...)
>
> What is the type of Weekdays.mon supposed to be?

The specification doesn't mention that; it should.

I'm calling them EnumValue, but that makes it difficult to talk
about. The term "value" is commonly used to refer to an instance of a
type, so "enumeration value" sounds like an instance of the type
"enumeration", which is confusing.

Perhaps, since "collection" seems the right metaphor for an
enumeration, each of the values in an enumeration should be
EnumMember. On the assumption these might be basic types, though, that
name doesn't read so easily in lowercase ('enummember').

Thoughts?

-- 
 \       "What I resent is that the range of your vision should be the |
  `\                              limit of my action."  -- Henry James |
_o__)                                                                  |
Ben Finney


From sybrenUSE at YOURthirdtower.com.imagination  Sat Feb 25 06:53:25 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Sat, 25 Feb 2006 12:53:25 +0100
Subject: How to send an email with non-ascii characters in Python
References: <1140775736.341876.314070@t39g2000cwt.googlegroups.com>
	<slrndvtn7p.e6o.sybrenUSE@schuimige.unrealtower.org>
	<1140777219.636561.47960@e56g2000cwe.googlegroups.com>
	<slrndvuma9.f5e.sybrenUSE@schuimige.unrealtower.org>
	<1140866239.019528.183190@t39g2000cwt.googlegroups.com>
Message-ID: <slrne00h9l.g7l.sybrenUSE@schuimige.unrealtower.org>

Lad enlightened us with:
> Body='R?d?c?ch M?rinka a ?kol?k K?ja
> Mar?k'.decode('utf8').encode('windows-1250')# I use the text written
> in my editor with utf-8 coding, so first I decode and then encode to
> windows-1250

Why would you do that? What's the advantage of windows-1250?

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From LittlePython at lost.com  Tue Feb 14 19:30:39 2006
From: LittlePython at lost.com (LittlePython)
Date: Wed, 15 Feb 2006 00:30:39 GMT
Subject: Newbie
References: <v3JHf.2731$lo3.2501@trnddc07>
	<43ef6433$0$25387$636a55ce@news.free.fr>
	<HZJHf.2737$lo3.1139@trnddc07>
	<1139806792.698674.168530@g44g2000cwa.googlegroups.com>
Message-ID: <PCuIf.32401$lo3.15259@trnddc07>

I really do not wish to limit myself to MS. My bread and butter is MS but I
am a BSD fan at heart. I wanted to learn something I can use in both.

I thought about Perl first but  I feel the learning curve is to steep (to
get it right),  it seems easier to make a mistake in Perl and not catch it.
Python just feels right and fits me better. ... Well what do I know ... you
make you pick and take your chances.

<bonono at gmail.com> wrote in message
news:1139806792.698674.168530 at g44g2000cwa.googlegroups.com...
>
> LittlePython wrote:
> > I am very new to python. I have been studying it for only a month or so.
I
> > have been using vbscript for about 2-3 yrs and only recently been using
it
> > rather heavily the past 9 months or so. I am new very new to oop. My
main
> > use will be administrative scripting into the win3k, XP, AD domain,
> > 55exchange and 2003exchange environments. I like to incorp wxpython
(GUI)
> > into my scripts instead of HTA's that I have been using with VBS. I am
also
> > finding myself being tasked with jobs that are outside the scope of VBS.
> > Well that's a lot to learn and I have a feeling that to many I am just
> > another member of  "The Ministry of STUPID Questions"
> >
> Out of curiosity, why python ? The new VB.Net seems to be a very
> interesting one language wise and given that you have a VB experience,
> it seems to be a natural one to try.
>




From pydecker at gmail.com  Mon Feb 13 08:02:09 2006
From: pydecker at gmail.com (Peter Decker)
Date: Mon, 13 Feb 2006 08:02:09 -0500
Subject: Python equivilant to msgbox()
In-Reply-To: <1139794076.321041.320480@g43g2000cwa.googlegroups.com>
References: <7CQHf.2690$7C3.1780@trnddc08> <43efd40a$1_2@newspeer2.tds.net>
	<1139794076.321041.320480@g43g2000cwa.googlegroups.com>
Message-ID: <ca55a9900602130502p17c6d20blbe0d7652393defcd@mail.gmail.com>

On 12 Feb 2006 17:27:56 -0800, Andr? <andre.roberge at gmail.com> wrote:

> It's also possible to something like that with wxPython.  Try:
> import wx
> app = wx.PySimpleApp()
> dlg = wx.TextEntryDialog(None, 'Enter value', 'Title', '')
> if dlg.ShowModal() == wx.ID_OK:
>     val = dlg.GetValue()  # this line should be indented
> dlg.Destroy()
> print "you have entered %s" % val

That's the sort of butt-ugly code that got me convinced that Dabo is
the way to go. To get a simple message box, you have to create it,
show it, check a return value against an ugly constant (make sure you
don't forget an use wx.OK instead!), and then remember to destroy it
or your app will hang.

The same code in Dabo is:

val = dabo.ui.getString("Enter value", "Some Title")
if val in None:
   print "You canceled"
else:
   print "You entered %s" % val

Look at both examples, and tell me which looks more Pythonic to you.

--

# p.d.


From steve.horsley at gmail.com  Mon Feb 13 18:55:28 2006
From: steve.horsley at gmail.com (Steve Horsley)
Date: Mon, 13 Feb 2006 23:55:28 +0000
Subject: how do you pronounce 'tuple'?
In-Reply-To: <1139863824.940773.36310@f14g2000cwb.googlegroups.com>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<1139863824.940773.36310@f14g2000cwb.googlegroups.com>
Message-ID: <dsr69f$epf$1@news.freedom2surf.net>

Paddy wrote:
> Its tupple surely.
> 
> The following shows that we are not the first to ponder this:
> 
> http://www.jot.fm/issues/issue_2003_03/column9
> 
> Stick tuple into the Windosw XP speech properties preview box and hit
> preview-voice,  it says tupple not toople. :-)
> 
Which only goes to prove that it really should be two-pull.


From iddw at hotmail.com  Tue Feb 21 10:43:36 2006
From: iddw at hotmail.com (Dave Hansen)
Date: Tue, 21 Feb 2006 09:43:36 -0600
Subject: Mutable numbers
References: <dteele$9pi$1@home.itg.ti.com>
Message-ID: <84dmv151coougm2ti83jpu9tl8er9js2uj@4ax.com>

On Tue, 21 Feb 2006 12:44:52 +0530 in comp.lang.python, Suresh
Jeevanandam <jm.suresh at gmail.com> wrote:

># I am new to python.
>
>In python all numbers are immutable. This means there is one object ( a 
>region in the memory ) created every time we do an numeric operation. I 
>hope there should have been some good reasons why it was designed this way.
>
>But why not have mutable numbers also in the language. A type which 
>would behave as follows:
>
>a = MutableInt(12)

a = [12]

>b = a
>
>Now both a and b should refer to the same memory location. Any change in 
>the object should get reflected in all the references.
>
>a.assign(13) # Same memory location should be updated with value 13, b 

a[0] = 13

>is also 13 now.
>
>Now we can further optimize:
>
>a.incrementOne() # equivalent to a++ in C++
>a.decrementOne()

a[0] += 1
a[0] -= 1

>
>and the augmented assignment operation also could be made optimized.
>
>In any application most of the operation is numerical. So, i think, we 
>should get a good speed advantage with the availability of mutable 
>numbers. What do you think ?

I don't see how.

HTH,
                                        -=Dave

-- 
Change is inevitable, progress is not.


From uval at rz.uni-karlsruhe.de  Wed Feb  8 12:55:47 2006
From: uval at rz.uni-karlsruhe.de (=?ISO-8859-1?Q?Sch=FCle_Daniel?=)
Date: Wed, 08 Feb 2006 18:55:47 +0100
Subject: UnboundMethodType and MethodType
In-Reply-To: <43e9f92c$1_3@newspeer2.tds.net>
References: <dsbl2g$i1b$1@news2.rz.uni-karlsruhe.de>
	<43e9635b$1@nntp0.pdx.net> <43e9f92c$1_3@newspeer2.tds.net>
Message-ID: <dsd4ni$nl4$1@news2.rz.uni-karlsruhe.de>

[...]

>> It's the same function, whether it's bound or not. Thus, it should 
>> always have the same type. 
> 
> 
> No, it's not the same function. You got the same id because you didn't 
> bind B.bar and b.bar to anything so the id was reused.

thank you for the explanation
it's indeed tricky with reusing the id
are there some pages on the net to read more about it?

 >>> class Q:
...     def __init__(self,val):
...             self.val = val
...     def bar(self):
...             print self.val
...
 >>> x = Q.bar
 >>> y = Q("test").bar
 >>> x
<unbound method Q.bar>
 >>> y
<bound method Q.bar of <__main__.Q instance at 0x40427a6c>>
 >>> y()
test
 >>> id(x)
1078081812
 >>> id(y)
1078082492
 >>>

the same id-value would enforce two objects to be
of the same type (trivial case)
the reverse is not necessarily true
in this case x.bar and y.bar are of the same type

UnboundMethodType is still not very suitable name for Q().bar
:-/

Regards, Daniel



From dementrio at gmail.com  Wed Feb 15 11:23:14 2006
From: dementrio at gmail.com (dementrio)
Date: 15 Feb 2006 08:23:14 -0800
Subject: low level data types
In-Reply-To: <mailman.1951.1140015161.27775.python-list@python.org>
References: <1140005257.773955.32860@g14g2000cwa.googlegroups.com>
	<mailman.1951.1140015161.27775.python-list@python.org>
Message-ID: <1140020594.762674.162840@g47g2000cwa.googlegroups.com>

Thanks for the hint!

However now I have another problem - endianness (the client runs on
powerpc, the server on x86). I found that simply reversing the stuff I
recv() works, but is there any cleaner way for taking care of this?



From fredrik at pythonware.com  Thu Feb  2 02:12:46 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 2 Feb 2006 08:12:46 +0100
Subject: PIL and transparent GIFs
References: <43e12849$0$1145$7a628cd7@news.club-internet.fr><1138833665.400460.232350@f14g2000cwb.googlegroups.com>
	<20060201185803.34d45eed@samwise.anansi>
Message-ID: <drsbdg$68d$1@sea.gmane.org>

Terry Hancock wrote:

> There was a patch published at one time that was supposed
> to fix this. I remember doing some testing and not finding
> it to work perfectly, but I may have been doing something
> wrong.  Can't recover it at the moment, but some search
> engine work might turn it up.

transparency write support was added in 2002.

however, PIL's Image object doesn't have a notion of "transparent
color index", so you have to keep track of it yourself.

    im = Image.open(...)
    transparency = im.info["transparency"]
    ...
    out.save("out.gif", transparency=transparency)

</F>





From garabik-news-2005-05 at kassiopeia.juls.savba.sk  Sun Feb 12 11:14:14 2006
From: garabik-news-2005-05 at kassiopeia.juls.savba.sk (garabik-news-2005-05 at kassiopeia.juls.savba.sk)
Date: Sun, 12 Feb 2006 16:14:14 +0000 (UTC)
Subject: Legality of using Fonts
References: <1139591308.864757.154740@g44g2000cwa.googlegroups.com>
	<pan.2006.02.10.23.30.05.619934@REMOVETHIScyber.com.au>
	<1139619641.908053.112010@f14g2000cwb.googlegroups.com>
Message-ID: <dsnmsl$2oeg$1@ns.felk.cvut.cz>

Kamilche <klachemin at comcast.net> wrote:
> Yeah, that's what I'm thinking, as well. Showing all the text on an
> image is one thing... using that image as the basis of a font engine is
> something different.
> 
> Luckily, someone has sent me a link to a set of free TrueType fonts -
> http://www.gnome.org/fonts , the 'Vera' family. I guess I'll turn those
> into bitmaps to stay out of the gray area.
> 
> I have other reasons I want to use a bitmap font, other than licensing
> issues.
> 

You should probably check out X11 misc-fixed family of fonts.
They have free license and are designed from the begining as bitmaps,
which means they are more readable at small sizes (since they were
designed to be displayed at fixed sizes). They are monospaced, which
might be an advantage or not. 

-- 
 -----------------------------------------------------------
| Radovan Garab?k http://kassiopeia.juls.savba.sk/~garabik/ |
| __..--^^^--..__    garabik @ kassiopeia.juls.savba.sk     |
 -----------------------------------------------------------
Antivirus alert: file .signature infected by signature virus.
Hi! I'm a signature virus! Copy me into your signature file to help me spread!


From usenet-2004 at lithe.de  Sun Feb 12 15:59:33 2006
From: usenet-2004 at lithe.de (Jan Niklas Fingerle)
Date: 12 Feb 2006 20:59:33 GMT
Subject: super(...).__init__() vs Base.__init__(self)
References: <43eb5a9d$1_2@newspeer2.tds.net>
	<K5mdnTQ_1Ime4XbeRVn-ig@comcast.com>
	<43eba7f7$0$507$9b4e6d93@newsread4.arcor-online.net>
	<OMydnYPzi6FiYHbeRVn-rQ@comcast.com>
Message-ID: <43efa1b5$0$505$9b4e6d93@newsread4.arcor-online.net>

Steven Bethard <steven.bethard at gmail.com> wrote:
> Jan Niklas Fingerle wrote:
> > Steven Bethard <steven.bethard at gmail.com> wrote:
> >> Personally, I'd call the lack of the super calls in threading.Thread and 
> >> Base bugs.  
> > 
> > It can't be a bug since it wasn't a bug before super was introduced and
> > you don't wan't to break working Python-2.x-code. 
> 
> Just because there wasn't a bugfix available at the time doesn't mean it 
> wasn't a bug. ;) 

Yes, but it isn't a bug. 

> The threading.Thread class does not properly call 
> sibling constructors in multiple inheritance. > This should either be 
> fixed in the implementation (by introducing a call to super) 

This would break existing code as shown in http://fuhm.org/super-harmful/
(look out for "Subclasses must use super if their superclasses do").
And as much as I agree with GvR that the word "harmful" is inappropriate
(http://mail.python.org/pipermail/python-dev/2005-January/050656.html),
I agree with both, that super is a part of your class's interface that
you might use or not. You just have to document it, whether you use
super, or not. Or to quote GvR: "Super is intended for use that are 
designed with method cooperation in mind [...]". That's isn't "always".

The best pratices (see any of the two URLs above) obviously show, that
using super comes at some cost. This is OK, if you really have to
support cooperative method calling. But I wouldn't want to pay it "just
in case".

> or fixed in 
> the documentation 

This is true, but this or the other way round: You have to document,
that you're using super(), or that you don't do it. 

> (by indicating that threading.Thread does not support 
> multiple inheritance in its __init__() method).

It *does* support multiple inheritance, it just doesn't support diamond
shape inheritance (not counting object). 

> I've used diamond inheritance exactly once, and all the classes under 
> that hierarchy were under my control, so they all used super properly. 

And this is, what super() is meant for. I, for my part, won't use 
super() until I really need it, but when the time comes I will 
worship an extra hour at my Guido-van-Rossum-shrine. ;-)


From steve at REMOVEMEcyber.com.au  Tue Feb 21 03:43:46 2006
From: steve at REMOVEMEcyber.com.au (Steven D'Aprano)
Date: Tue, 21 Feb 2006 19:43:46 +1100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com>
	<mailman.2160.1140440898.27775.python-list@python.org>
	<1140454473.335788@jetspin.drizzle.com>
	<pan.2006.02.20.21.59.12.636908@REMOVETHIScyber.com.au>
	<1140490302.639049@jetspin.drizzle.com>
Message-ID: <43FAD2C2.7080908@REMOVEMEcyber.com.au>

Donn Cave wrote:

> Quoth Steven D'Aprano <steve at REMOVETHIScyber.com.au>:
> ...
> | Nobody denies that Python code running with no optimization tricks is
> | (currently) slower than compiled C code. That's a matter of objective
> | fact. Nobody denies that Python can be easily run in interactive mode.
> | Nobody denies that *at some level* Python code has to be interpreted.
> |
> | But ALL code is interpreted at some level or another. And it is equally
> | true that at another level Python code is compiled. Why should one take
> | precedence over the other?
> 
> I have no idea, what precedence?  

There seem to be two positions in this argument:

The "Python is interpreted and not compiled" camp, who 
appear to my eyes to dismiss Python's compilation stage 
as a meaningless technicality.

The "Python is both interpreted and compiled" camp, who 
believe that both steps are equally important, and to 
raise one over the other in importance is misleading.


 > All I'm saying is that Python matches
> what people think of as an interpreted language.

Most people in IT I know of still think of 
"interpreted" as meaning that every line of source code 
is parsed repeatedly every time the code is executed. 
Even when they intellectually know this isn't the case, 
old habits die hard -- they still think of 
"interpreted" as second class.

If you think that Python has to parse the line "print 
x" one hundred times in "for i in range(100): print x" 
then you are deeply, deeply mistaken.

That's why Sun doesn't describe Java as interpreted, 
but as byte-code compiled. They did that before they 
had JIT compilers to compile to machine code. 
Consequently nobody thinks of Java source having to be 
parsed, and parsed, and parsed, and parsed again.


 > You can deny it, but
> but it's going to look like you're playing games with words, and to no
> real end, since no one could possibly be deceived for very long.

Pot, meet kettle.

A simple question for you: does Python compile your 
source code before executing it? If you need a hint, 
perhaps you should reflect on what the "c" stands for 
in .pyc files.


 > If you
> give me a Python program, you have 3 choices:  cross your fingers and
> hope that I have the required Python interpreter version, slip in a
> 25Mb Python interpreter install and hope I won't notice, or come clean
> and tell me that your program needs an interpreter and I should check to
> see that I have it.

Hey Donn, here is a compiled program for the PowerPC, 
or an ARM processor, or one of IBM's Big Iron 
mainframes. Or even a Commodore 64. What do you think 
the chances are that you can execute it on your 
x86-compatible PC? It's compiled, it should just 
work!!! Right?

No of course not. If your CPU can't interpret the 
machine code correctly, the fact that the code is 
compiled makes NO difference at all.

In other words, I have three choices:

- cross my fingers and hope that you have the required 
interpreter (CPU);

- slip in an interpreter install (perhaps an emulator) 
and hope you won't notice;

- or come clean and tell you that my program needs an 
interpreter ("Hey Donn, do you have a Mac you can run 
this on?") and you should check to see that you have it.



-- 
Steven.



From python at hope.cz  Fri Feb 24 05:08:56 2006
From: python at hope.cz (Lad)
Date: 24 Feb 2006 02:08:56 -0800
Subject: How to send an email with non-ascii characters in Python
Message-ID: <1140775736.341876.314070@t39g2000cwt.googlegroups.com>

Can anyone give an example how to send email with non-ascii characters(
both in subject and body).
I would like to use windows-1250 code page
Thank you
L.B.



From jth01 at arcor.de  Sat Feb  4 05:39:00 2006
From: jth01 at arcor.de (Jens Theisen)
Date: 04 Feb 2006 10:39:00 +0000
Subject: Graphical introspection utilities?
Message-ID: <9nCP$o$FciB@jens-theisen.de>

Hello,

as it would be so obviously a good thing to have a graphical (or maybe  
curses-base) browser through the dynamic state of a Python program, it's  
probably there.

Can someone point me to something?

Cheers,

Jens



From aleaxit at yahoo.com  Tue Feb  7 22:35:47 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Tue, 7 Feb 2006 19:35:47 -0800
Subject: Detecting line endings
References: <1139236514.022464.319970@g14g2000cwa.googlegroups.com>
	<1hacujo.1p81efw1ej38ioN%aleaxit@yahoo.com>
	<1139304588.446722.255240@o13g2000cwo.googlegroups.com>
	<1hadpni.1ne1raq17jjbyaN%aleaxit@yahoo.com>
	<1139330618.241072.31770@g43g2000cwa.googlegroups.com>
Message-ID: <1haemdd.18tlbi21nzft50N%aleaxit@yahoo.com>

Fuzzyman <fuzzyman at gmail.com> wrote:
   ...
> I can't open with a codec unless an encoding is explicitly supplied.  I
> still want to detect UTF16 even if the encoding isn't specified.
> 
> As I said, I ought to test this... Without metadata I wonder how Python
> determines it ?

It doesn't.  Python doesn't even try to guess: nor would any other
sensible programming language.


Alex


From rtilley at vt.edu  Wed Feb  8 16:31:23 2006
From: rtilley at vt.edu (rtilley)
Date: Wed, 08 Feb 2006 16:31:23 -0500
Subject: os.walk() dirs and files
In-Reply-To: <1139424969.392016.278030@o13g2000cwo.googlegroups.com>
References: <dscrjr$joa$1@solaris.cc.vt.edu><dscs1j$k9l$1@solaris.cc.vt.edu>
	<Xns97648B528F8DDduncanbooth@127.0.0.1>
	<dsct5a$lsp$1@solaris.cc.vt.edu>
	<1139424969.392016.278030@o13g2000cwo.googlegroups.com>
Message-ID: <dsdnvj$8vn$1@solaris.cc.vt.edu>

George Sakkis wrote:

> Or a bit more efficiently (no need to allocate a new list for storing
> files+dirs):
> 
> from itertools import chain
> for root, dirs, files in os.walk(path):
> 	for fs_object in chain(files,dirs):
> 		ADD fs_object to dictionary

I like that! itertools is cool... a bit abstract and computer sciencey, 
but it sure does work in a practical manner :)


From aleaxit at yahoo.com  Wed Feb  1 21:53:27 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Wed, 1 Feb 2006 18:53:27 -0800
Subject: nDimensional sparse histogram in python.
References: <1138848672.791908.90050@g44g2000cwa.googlegroups.com>
Message-ID: <1ha3gff.u4comocxo4ddN%aleaxit@yahoo.com>

KraftDiner <bobrien18 at yahoo.com> wrote:
   ...
> histo = {[0,0,0]:1, [0,0,1]:2}
> Would indicate that there is one sample at 0,0,0 and two samples at
> 0,0,1
> but python tells me TypeError: list objects are unhashable
> 
> So any suggestions would be welcome.

Use tuples, not lists, as your keys:

histo = {(0,0,0):1, (0,0,1):2}


Alex


From walter at livinglogic.de  Mon Feb 27 12:20:19 2006
From: walter at livinglogic.de (=?ISO-8859-1?Q?Walter_D=F6rwald?=)
Date: Mon, 27 Feb 2006 18:20:19 +0100
Subject: unicode question
In-Reply-To: <43FFC95E.4030202@gradient.cis.upenn.edu>
References: <43FFC95E.4030202@gradient.cis.upenn.edu>
Message-ID: <440334D3.5010302@livinglogic.de>

Edward Loper wrote:

> [...]
> Surely there's a better way than converting back and forth 3 times?  Is
> there a reason that the 'backslashreplace' error mode can't be used with 
> codecs.decode?
> 
>  >>> 'abc \xff\xe8 def'.decode('ascii', 'backslashreplace')
> Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
> TypeError: don't know how to handle UnicodeDecodeError in error callback

The backslashreplace error handler is an *error* *handler*, i.e. it 
gives you a replacement text if an input character can't be encoded. But 
a backslash character in an 8bit string is no error, so it won't get 
replaced on decoding.

What you want is a different codec (try e.g. "string-escape" or 
"unicode-escape").

Bye,
    Walter D?rwald



From michael at stroeder.com  Tue Feb 14 15:40:38 2006
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Tue, 14 Feb 2006 21:40:38 +0100
Subject: Embedding an Application in a Web browser
In-Reply-To: <43f1fa4a$0$4780$636a55ce@news.free.fr>
References: <1139930045.408507.151440@g43g2000cwa.googlegroups.com>
	<43f1fa4a$0$4780$636a55ce@news.free.fr>
Message-ID: <6rr9c3-heb.ln1@nb2.stroeder.com>

bruno at modulix wrote:
> rodmc wrote:
> 
>>Is it possible to embed a Python application within Internet explorer?
> 
> No. Nor in any other browser (except from Grail, but I think this
> doesn't count).

I remember there was a project for running CGI-BIN-like programs
directly in Mozilla without a web server.

But I can't find it anymore.

Ciao, Michael.


From fredrik at pythonware.com  Sun Feb  5 09:31:18 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 5 Feb 2006 15:31:18 +0100
Subject: Compiling
References: <mailman.1387.1138986082.27775.python-list@python.org><43e392d1$0$31853$626a54ce@news.free.fr><mailman.1390.1138988111.27775.python-list@python.org><43e3972f$0$624$626a14ce@news.free.fr>
	<1139149306.188367.193770@g47g2000cwa.googlegroups.com>
Message-ID: <ds527n$aor$1@sea.gmane.org>

Ravi Teja wrote:

> This is a standard response to a rather frequent question here. But I
> am not sure I ever understood. Scheme / Lisp are about as dynamic as
> Python.

if that were fully true, it would be fairly trivial to translate Python to
scheme or lisp and compile it.

> Another standard response is "nobody felt the need or got around to
> it". And yet a number of Lisp and Scheme compilers exist when these
> languages have a much smaller user base. Am I missing something here?

an endless supply of grad students ?

</F>





From hinnc at yahoo.com  Tue Feb  7 17:39:23 2006
From: hinnc at yahoo.com (slogging_away)
Date: 7 Feb 2006 14:39:23 -0800
Subject: Too Many if Statements?
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<dsaqkj$jhm$1@xenon.Stanford.EDU>
	<GU8Gf.22899$Jd.6095@newssvr25.news.prodigy.net>
Message-ID: <1139351963.726417.115530@g44g2000cwa.googlegroups.com>

Hmmm - good responses all around.  Thank you all for your valued
feedback.

Perhaps it's too may 'if' statements under the for XXX in range(x,x,x)
statement as most of the 'if' statements appear there.  It could be
something entirely else.  I'm afraid its a bug with Python, (if I try
and run it several times it keeps going to the IDLE console prompt and
it eventually crashes out of Python entirely).

Some useful suggestions were provided in terms of better design so that
may be my route at this point.  Thanks again for all of your help!



From sysfault at zetafunc.net  Wed Feb  1 18:03:46 2006
From: sysfault at zetafunc.net (Anthony Greene)
Date: Wed, 01 Feb 2006 18:03:46 -0500
Subject: OO conventions
References: <mailman.1334.1138833641.27775.python-list@python.org>
Message-ID: <pan.2006.02.01.23.03.37.881298@zetafunc.net>

On Wed, 01 Feb 2006 23:40:37 +0100, Daniel Nogradi wrote:

> I'm relatively new to object oriented programming, so get confused
> about its usage once in a while. Suppose there is a class Image that
> has a number of methods, rotate, open, verify, read, close, etc. Then
> to use this class my natural guess would be to have something like
> 
> image = Image( )
> image.read( "myfile.jpg" )
> image.rotate( )
> image.close( )
> 
> But now it turns out that the PIL module uses this as
> 
> image = Image.open( "myfile.jpg" )
> image.verify( )
> image.rotate( )
> image.close( )
> 
> Perhaps the real Image class of PIL doesn't have these methods
> exactly, but doesn't matter, my point is the way it works. Is it
> normal that instead of first creating an instance of a class, it
> starts right away with one its methods? I of course understand that
> the PIL people simply made a choice that their module works this way,
> period, but I'm just wondering if it wouldn't have been more "logical"
> to do it along the way of my first example.
> 
> I guess it's just a matter of convention or how the programmer feels
> like, but there are no conventions of this type? Which would be more
> pythonic? Or I shouldn't worry and it's totally up to the developer?

In this case, Image seems to be a python module, with the open function
defined, PIL's Image is not a class.

-- 
A wise man knows he knows nothing.



From theller at python.net  Sun Feb 12 16:12:54 2006
From: theller at python.net (Thomas Heller)
Date: Sun, 12 Feb 2006 22:12:54 +0100
Subject: Single-file executables
In-Reply-To: <43EE7C2A.3040102@v.loewis.de>
References: <daadb$43ee6b05$4275d90a$28181@FUSE.NET>
	<43EE7C2A.3040102@v.loewis.de>
Message-ID: <dso8cl$e2d$1@sea.gmane.org>

Martin v. L?wis wrote:
> Kevin Walzer wrote:
>> The apps I've seen created by py2exe aren't single-file at all, the
>>  install folder is full of files besides the main program. I'm 
>> looking for a solution that stuffs all libraries, scripts, and the
>>  Python runtime into one file.

Usually the bundle=1 option in py2exe can create a single file exe, but it also
allows to have a separate shared library.zip file, which is useful if you need more than
one exe-file.  With python 2.4, MSVCR71.dll is still required and not bundled.  There are 
technical reasons ('booting' the exe) and maybe legal reasons for that.


> For full control, and truly single-binary executables, I recommend to
> use freeze itself. It takes a bit more work, but also gives better 
> results.


I wonder if anyone is actually using freeze on Windows, with scripts that use,
say, pywin32 and wxPython.

I've said it before, and say it again: Creating real single-file exes or dlls
was a non-goal for py2exe.  The goal was to be able to create in-process COM
servers which provide a python interpreter that is totally isolated from possible
other interpreters running in the same process.

py2exe simulates a statically linked python interpreter together with statically
linked extension modules.  So, it is very similar to what freeze creates.

Thomas



From xavier.morel at masklinn.net  Sun Feb  5 13:46:25 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Sun, 05 Feb 2006 19:46:25 +0100
Subject: Learning Python
In-Reply-To: <1139160795.149427.120760@g44g2000cwa.googlegroups.com>
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
	<1139156577.897100.69140@g43g2000cwa.googlegroups.com>
	<mailman.1439.1139157505.27775.python-list@python.org>
	<1139158796.288778.244000@z14g2000cwz.googlegroups.com>
	<ds5c0n$cej$2@aphrodite.grec.isp.9tel.net>
	<1139159843.488988.279770@g43g2000cwa.googlegroups.com>
	<1139160795.149427.120760@g44g2000cwa.googlegroups.com>
Message-ID: <ds5gun$8v6$1@apollon.grec.isp.9tel.net>

Byte wrote:
>> parse the expression, extract the operands and the operation, apply the
> operation to the operands
> 
> How? Give me some example code, but please keep it simple.
> 
>> are you trying to code a calculator?
> 
> Not intending to, just trying to learn Python. Suppose what i'm trying
> to code is a but like a CLI calculator, but i'm just writing it for my
> own educational beifits.
> 

Side note: have you read Dive into Python (http://diveintopython.org/) 
yet? If you haven't -- and are done reading the whole python tutorial -- 
you should, it's a very good and practical read.

Now about the calculator, let's do a simple RPN notation (they're much 
simpler to compute than the "regular" notation, see 
http://en.wikipedia.org/wiki/RPN for some informations about RPN)

First, we need an input

-->
expression = raw_input("> ")
<--

Now we need to handle this input. An RPN expression is a space-separated 
list of tokens, these tokens being either operands (numbers) or 
operations. This means that we merely need to split our expression at 
the spaces

-->
expression = raw_input("> ")
tokens = expression.split() # split a string using spaces as default 
split delimiter
<--

Now we have a list of tokens.

RPN calculations involve a stack, to keep the current operands. Python's 
`list` has everything you need to emulate a stack

-->
expression = raw_input("> ")
tokens = expression.split() # split a string using spaces as default 
split delimiter
stack = list()
<--

Now, we have to handle each token.
Either a token is a number (an operand), in which case we have to 
convert it to an integer (it's currently stored as a string), or it's an 
operation, in which case we have to apply the operation on the last two 
tokens of the computation stack and store the result back on the stack.

This means that we have to store addition, substraction, multiplication 
and division. Luckily, there is the python module `operator` that stores 
an accessor to these operations (add, sub, mul, div). We could store 
them in a dictionary with an operation token as index: we feed the 
operation token to the dict, it outputs the operation function.

-->
import operator

operations = {
     "+": operator.add,
     "-": operator.sub,
     "*": operator.mul,
     "/": operator.div
}

expression = raw_input("> ")
tokens = expression.split() # split a string using spaces as default 
split delimiter
stack = list()
<--

Good, now all we need to know is to feed each token to the `operations` 
dict, let's try with the first token of the RPN expression "1 2 + 4 * 3 +"

 >>> operations['1']

Traceback (most recent call last):
   File "<pyshell#12>", line 1, in -toplevel-
     operations['1']
KeyError: '1'

Well, there is no "1" key in our dictionary, so we get an error. Kind of 
obvious.
The Python dictionaries also have a "get" method that takes a key and a 
value, and they return the value (default) if the key doesn't exist, how 
would that one fare?

 >>> operations.get('1',None)
 >>> operations.get('2',None)
 >>> operations.get('+',None)
<built-in function add>
 >>>

Ok, it's return the operation function if it knows the token we feed it, 
and "None" if it doesn't.
Now all we have to do is check if it returns None, and if it does we 
know it's an operand and not an operation.

First we need to loop on the list of tokens:

-->
import operator

operations = {
     "+": operator.add,
     "-": operator.sub,
     "*": operator.mul,
     "/": operator.div
}

expression = raw_input("> ")
tokens = expression.split() # split a string using spaces as default 
split delimiter
stack = list()

for token in tokens:
     operation = operations.get(token, None)
     if operation: # If operation is not "None", therefore if the token 
was an operation token
         pass # do nothing for now
     else: # if operation is "None" == if the token is an operand token
         pass # do nothing either
<--

Ok, what are we supposed to do if the token is an operand? Convert the 
operand (token) to an integer (the token is a string), and then add it 
to our computational stack.
The last part is done via the `append` methods of  Python's list.

If the token is an operation, we have to apply the operation to the last 
two operands of the stack, and push the result back on the stack
To get the last operation of a Python list, we use the `pop`method, it 
defaults to returning the last value of a list.

-->
import operator

operations = {
     "+": operator.add,
     "-": operator.sub,
     "*": operator.mul,
     "/": operator.div
}

expression = raw_input("> ")
tokens = expression.split() # split a string using spaces as default 
split delimiter
stack = list()

for token in tokens:
     operation = operations.get(token, None)
     if operation: # If operation is not "None", therefore if the token 
was an operation token
         result = operation(stack.pop(), stack.pop()) # apply the 
operation on the last two items of the stack
	stack.append(result) # put the result back on the stack
     else: # if operation is "None" == if the token is an operand token
         stack.append(int(token)) # Convert the token to an integer and 
push it on the stack
<--

Ok, let's test that shall we?
What happens if we feed it "1 2 + 4 * 3 +", this should return 15 = 
(1+2)*4+3.
The result is the only item that should be left on our stack

-->
 >>> operations = {
     "+": operator.add,
     "-": operator.sub,
     "*": operator.mul,
     "/": operator.div
}
 >>> expression = raw_input("> ")
 > 1 2 + 4 * 3 +
 >>> tokens = expression.split() # split a string using spaces as 
default split delimiter
 >>> stack = list()
 >>> for token in tokens:
	operation = operations.get(token, None)
	if operation: # If operation is not "None", therefore if the token was 
an operation token
		result = operation(stack.pop(), stack.pop()) # apply the operation on 
the last two items of the stack
		stack.append(result) # put the result back on the stack
	else: # if operation is "None" == if the token is an operand token
		stack.append(int(token)) # Convert the token to an integer and push it 
on the stack

		
 >>> stack
[15]
 >>>
<--
Gread. Now let's try it again with the expression "1 4 -". This should 
return -3.

-->
 >>> # snip
 >>> stack
[3]
<--
Duh, the result is wrong.

This is because when we do operation(stack.pop(), stack.pop()), we use 
the last value of the stack as the first operand of our operation (here, 
our expression resolves to "operator.sub(4, 1)" which is equivalent to 
"4-1", which is wrong).
Let's get out operands in the good order by replacing that line with

-->
operand2 = stack.pop()
operand1 = stack.pop()
result = operation(operand1, operand2)
<--

And now it works, we have a basic RPN calculator.

Homework: truth is that this calculator kind of sucks: it's very easy to 
break it.

Try using "-" as your input expression. Or "1 +", or "1 56 + +". What 
happens?
Try to modify the calculator to avoid these errors, or handle them 
gracefully.

Likewise, entering the expression "5 0 /" results in a Division By Zero 
error. Try to handle it to display a friendly message instead of having 
the calculator blow.

You have to rewrite everything every time you want to compute a new 
expression. Modify the calculator to always ask for new expression until 
a specific command is entered (such as "exit")

The calculator breaks (again) if you use a token that is neither an 
integer nor an operation (e.g. "1 foo +", or even "foo")
Modify it to handle that kind of false input without exploding in your 
hands.

The output is ugly (a list of only one item), try to improve it.

Computing the expression "5 3 /" (5/3) returns "1". Why? How can you 
improve it?

Additionally, you currently cannot use floating point numbers (e.g. "1.5 
1.3 +") in your expressions (guess what the calculator does?), see if 
you could modify the calculator to handle floating point numbers.

Last, but not the least, try to create a Polish Notation calculator 
(prefix notation, it's like RPN but the operation is in front of the 
operand) and a "maths notation" calculator.


From felipe.lessa at gmail.com  Sat Feb 18 19:15:24 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sat, 18 Feb 2006 22:15:24 -0200
Subject: define loop statement?
In-Reply-To: <ov2dnUblZLiWKmrenZ2dnUVZ_t2dnZ2d@giganews.com>
References: <lW4Jf.31559$3V4.8390@trnddc06>
	<T4LJf.14256$915.10437@southeast.rr.com>
	<mailman.2111.1140303740.27775.python-list@python.org>
	<ov2dnUblZLiWKmrenZ2dnUVZ_t2dnZ2d@giganews.com>
Message-ID: <1140308124.6554.3.camel@kenshin>

Em Dom, 2006-02-19 ?s 11:08 +1100, Nigel Rowe escreveu:
> Felipe Almeida Lessa wrote:
> 
> > Em S?b, 2006-02-18 ?s 20:04 +0000, Jeffrey Schwab escreveu:
> >> if __name__ == '__main__':
> >>     loop = Loop(10)
> >>     while loop:
> >>         print "OK"
> > 
> > Maybe:
> > 
> > while Loop(10)():
> >     print "OK"
> > 
> > Looks rather ugly but requires one less line ;-).
> > 
> Doesn't work.  You get a NEW Loop(10) instance on each pass through the
> 'while'.  This is just an expensive way to make an endless loop.

Oh, sorry, ignore me on that one. Now I think I should sleep =S...

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From hancock at anansispaceworks.com  Fri Feb  3 01:13:29 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Fri, 3 Feb 2006 00:13:29 -0600
Subject: would it be feasable to write python DJing software
In-Reply-To: <druc1r$cre$1@bagan.srce.hr>
References: <1138925819.465108.181760@o13g2000cwo.googlegroups.com>
	<druc1r$cre$1@bagan.srce.hr>
Message-ID: <20060203001329.36d914b3@samwise.anansi>

On Fri, 03 Feb 2006 02:35:56 +0100
Ivan Voras <ivoras at __-fer.hr-__> wrote:
> Levi Campbell wrote:
> > Hi, I'm thinking about writing a system for DJing in
> > python, but I'm not sure if Python is fast enough to
> > handle the realtime audio needed for DJing
> 
> Any and all mixing would probably happen in some sort of
> multimedia  library written in C 

Of which more than one exists. You may have some interest in
PyMedia, PyGame (SDL), pyogg, pyvorbis packages.

You might want to try googling for "Python audio libraries",
that appears to turn up some other results.

Note that pyogg/pyvorbis will also give you access to
the embedded metadata in Ogg files, which sounds like it
might be useful in your application.

Cheers,
Terry

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From bearophileHUGS at lycos.com  Tue Feb 21 07:00:07 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 21 Feb 2006 04:00:07 -0800
Subject: deriving from float or int
In-Reply-To: <1140502954.660120.174160@g14g2000cwa.googlegroups.com>
References: <1140502954.660120.174160@g14g2000cwa.googlegroups.com>
Message-ID: <1140523207.341037.11440@z14g2000cwz.googlegroups.com>

Probably this is interesting for you:
http://home.tiscali.be/be052320/Unum.html

I think its API can be improved, but it can be used.

Bye,
bearophile



From gh at ghaering.de  Thu Feb 23 09:05:51 2006
From: gh at ghaering.de (=?ISO-8859-1?Q?Gerhard_H=E4ring?=)
Date: Thu, 23 Feb 2006 15:05:51 +0100
Subject: cx_Oracle and UTF8
In-Reply-To: <1140701445.217566.239200@z14g2000cwz.googlegroups.com>
References: <1140628824.353213.278300@o13g2000cwo.googlegroups.com>	<465kbtF9bvemU1@uni-berlin.de>
	<1140701445.217566.239200@z14g2000cwz.googlegroups.com>
Message-ID: <43FDC13F.4020700@ghaering.de>

Harald Armin Massa wrote:
> Dietz,
> 
> thank you for your answer.
> 
>>It's called NLS (national language support),
>>and it is like a locale-setting in python/C. I'm too lazy to google right
> 
> Sad thing: I allready googled that and had to learn: you CAN definitely
> change some parameters, that is sort order and language for error
> messages with
> alter session set NLSREGION  and set NLSLANGUAGE
> 
> The only part about the charset is with NLSLANG, which could be set to
> German_Germany.UTF8
> 
> BUT ... NLSLANG is no per-session parameter, not setable per alter
> session, it needs to get set within the environment to make SQLPLUS
> recognize it.  (and, I do of course use python not sqlplus= [...]

This is handled by the OCI, which both your Pyhton interface and SQLPLUS 
use. You should be able to do something like:

import os
os.environ["NLS_LANG"] = "German_Germany.UTF8"
import cx_Oracle
con = cx_Oracle.connect("me/secret at tns")
cur = con.cursor()
cur.execute("select foo from bar")
print cur.fetchone()[0]

HTH,

-- Gerhard


From lycka at carmen.se  Wed Feb 22 05:18:55 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 22 Feb 2006 11:18:55 +0100
Subject: Determing whether two ranges overlap
In-Reply-To: <mailman.2017.1140109713.27775.python-list@python.org>
References: <pan.2006.02.16.15.22.15.647369@digital-crocus.com>
	<mailman.2017.1140109713.27775.python-list@python.org>
Message-ID: <dthdqg$ii5$1@wake.carmen.se>

Fredrik Lundh wrote:
>     def overlap(a, b):
>         return a[1] > b[0] and a[0] < b[1]

Assuming that x[1] can't be smaller than x[0], this
is the right way to compare two ranges. Well, I guess
you need to figure out the borderline cases. Is it
a[1] > b[0] or a[1] >= b[0] which is relevant?

Anyway,  if we have N ranges and N is big, we'll get
lots of comparisions: N*(N-1)/2.

For large values of N, it might be better to somehow
cache/aggregate the intervals if this makes it possible
to make this into an N*M comparision where M is smaller
than (N-1)/2....

E.g, with discrete values for the intervals such as with
(10, 15), one might consider something like (untested):

hits = sets.Set()

for interval in intervals:
     for i in range(interval[0], interval[1]+1):
         if i in hits:
             raise ValueError('%s overlaps previous interval.'
                               % interval)
         hits.add(i)

E.g. if we have 1000 intervals where the average size of
an interval is 10, you get 10000 "i in hits" and "hits.add(i)"
instead of 499500 'a[1] > b[0] and a[0] < b[1]'.

As always, it's good to measure...assuming you have fairly
realistic data to test with.


From roy at panix.com  Mon Feb 13 08:58:09 2006
From: roy at panix.com (Roy Smith)
Date: Mon, 13 Feb 2006 08:58:09 -0500
Subject: how do you pronounce 'tuple'?
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<mailman.1806.1139805039.27775.python-list@python.org>
Message-ID: <roy-533CAF.08580913022006@reader2.panix.com>

In article <mailman.1806.1139805039.27775.python-list at python.org>,
 Steve Holden <steve at holdenweb.com> wrote:

> I teach on both sides of the Atlantic, and have learned to draw a mental 
> breath before trying to pronounce the word "router".

It took me a while to get used to that too, but honestly, the warm beer was 
much more difficult to deal with.  It's supposed to be cold on the way in 
and warm on the way out.

My other problem is that I'm into woodworking as well as computers.  When 
I'm mindlessly browsing news and see an article headline that says 
something like "router bits", I often have to stop and think about in which 
context I'm supposed to interpret that (a router is a woodworking tool, 
into which you can fit a variety of cutting bits).


From maxerickson at gmail.com  Sat Feb 25 11:06:41 2006
From: maxerickson at gmail.com (Max Erickson)
Date: Sat, 25 Feb 2006 16:06:41 +0000 (UTC)
Subject: Is Python a Zen language?
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
Message-ID: <Xns9775710A079B6maxericksongmailcom@80.91.229.5>

Given that python code is often described in terms of being 'pythonic' or 
not, and that pythonic is a term that is apparently well agreed upon yet 
seemingly impossible to define for someone who does not already understand 
the word, python is probably a zen language.

max 




From bonono at gmail.com  Tue Feb 21 22:27:38 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 21 Feb 2006 19:27:38 -0800
Subject: Basic coin flipper program - logical error help
In-Reply-To: <oOadnVkfiM7aWmbeRVn-vw@comcast.com>
References: <1140567243.251982.255620@g14g2000cwa.googlegroups.com>
	<UoOKf.49379$id5.43228@bgtnsc04-news.ops.worldnet.att.net>
	<oOadnVkfiM7aWmbeRVn-vw@comcast.com>
Message-ID: <1140578858.586591.243900@g43g2000cwa.googlegroups.com>


John Zenger wrote:
> Also, with the functional programming tools of map, filter, and lambda,
> this code can be reduced to just six lines:
>
> import random
>
> flips = map(lambda x: random.randrange(2), xrange(100))
> heads = len(filter(lambda x: x is 0, flips))
> tails = len(filter(lambda x: x is not 0, flips))

Or a filter/map/lambda free way:

heads = sum(random.randrange(2) for x in xrange(100))
tails = 100 - heads



From nicola.musatti at gmail.com  Wed Feb  8 09:12:12 2006
From: nicola.musatti at gmail.com (Nicola Musatti)
Date: 8 Feb 2006 06:12:12 -0800
Subject: Too Many if Statements?
In-Reply-To: <43e8e12c$0$27905$626a54ce@news.free.fr>
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<43e8d21b$0$32168$626a54ce@news.free.fr>
	<1139332178.557744.73030@g47g2000cwa.googlegroups.com>
	<43e8e12c$0$27905$626a54ce@news.free.fr>
Message-ID: <1139407932.379739.26340@g14g2000cwa.googlegroups.com>


bruno at modulix wrote:
[...]
> Suppose you have to match a line against a list of regexp and log if it
> doesn't match. You could of course repeat the whole code for each
> regexp, ie:
>
> if not re.match(r'a/regexp/here', line):
>   log('a first message')
>
> if not re.match(r'another/regexp/here', line):
>   log('another message')
>
> (... 150 regexps later ...)
>
> if not re.match(r'150/regexps/later', line):
>   log('pfww, getting tired of copy/pasting')
>
> etc...
>
> But you could also factor much of it:
>
> def checkMatch(line, regexp, msg):
>   if not re.match(regexp, line):
>     log(msg)
>
> then have a list of regexps/messages pairs and:
>   for exp, msg in regexps:
>     checkMatch(line, exp, msg)
>
> And now, you can add as many thousands regexps you want, you still have
> one (and only one) if in the code (well, in this snippet at least...).

If your checks are this complicated, I think you should consider
writing a parser for your configuration file. If you use a parser
generator it's not that difficult. Moreover a lexical analyzer could be
enough if your syntax is simple. I found Dave Beazley's PLY reasonably
easy to use: http://www.dabeaz.com/ply/

Cheers,
Nicola Musatti



From edreamleo at charter.net  Tue Feb 28 08:41:09 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Tue, 28 Feb 2006 07:41:09 -0600
Subject: ANN: Leo 4.4a7 released
Message-ID: <_pYMf.16$Ni1.10@fe06.lga>

Leo 4.4 alpha 7 is now available at:
http://sourceforge.net/project/showfiles.php?group_id=3458&package_id=29106

This version fixes some minor problems with Leo 4.4a6 and adds 
autocompletion and calltips. There are no known problems with this release. 
It may be better than beta quality.  Or not.

Leo is a text editor, data organizer, project manager and much more. See:
http://webpages.charter.net/edreamleo/intro.html

The highlights of Leo 4.4:
--------------------------
- An Emacs-like mini-buffer: you can now execute any command by typing its 
long name, with tab completion.

- Many new commands, including cursor and screen movement, basic character, 
word and paragraph manipulation, and commands to manipulate buffers, the 
kill ring, regions and rectangles. You can use Leo without using a mouse.

- Flexible key bindings and input modes. You can emulate the operation of 
Emacs, Vim, or any other editor.

- A tabbed log pane. The Find and Spell Check commands now use tabs instead 
of dialogs, making those commands much easier to use. Plugins or scripts can 
easily create new tabs. The Completion tab shows possible typing 
completions.

- Autocompletion and calltips.

- Dozens of other new features and bug fixes since Leo 4.3.3.

Quote of the month:
-------------------
"Thanks for a wonderful program - everybody should be using it! It blows the 
socks off that Java Mind mapping software that won project of the month a 
while back on sourceforge!" -- Derick van Niekerk.

Links:
------
Leo:      http://webpages.charter.net/edreamleo/front.html
Home:     http://sourceforge.net/projects/leo/
Download: http://sourceforge.net/project/showfiles.php?group_id=3458
CVS:      http://sourceforge.net/cvs/?group_id=3458
Quotes:   http://webpages.charter.net/edreamleo/testimonials.html

Edward
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------




From ptmcg at austin.rr._bogus_.com  Fri Feb 10 13:19:27 2006
From: ptmcg at austin.rr._bogus_.com (Paul McGuire)
Date: Fri, 10 Feb 2006 18:19:27 GMT
Subject: is there a better way?
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
Message-ID: <PO4Hf.4221$UN2.1478@tornado.texas.rr.com>

<markscala at gmail.com> wrote in message
news:1139594221.696053.7360 at g47g2000cwa.googlegroups.com...
> Problem:
>
> You have a list of unknown length, such as this: list =
> [X,X,X,O,O,O,O].  You want to extract all and only the X's.  You know
> the X's are all up front and you know that the item after the last X is
> an O, or that the list ends with an X.  There are never O's between
> X's.
>
> I have been using something like this:
> _____________________
>
> while list[0] != O:
>     storage.append(list[0])
>     list.pop(0)
>     if len(list) == 0:
>         break
> _____________________
>
> But this seems ugly to me, and using "while" give me the heebies.  Is
> there a better approach?
>
> hope this is clear.
> thanks
>
Use itertools.

>>> import itertools
>>> lst = "X,X,X,O,O,O,O,O,X,X,X,X,O,X".split(",")
>>> [z for z in itertools.takewhile(lambda x:x=="X",lst)]
['X', 'X', 'X']


-- Paul




From cfbolz at gmx.de  Mon Feb 20 08:07:49 2006
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Mon, 20 Feb 2006 14:07:49 +0100
Subject: Python vs. Lisp -- please explain
In-Reply-To: <873bienwlx.fsf@wilson.homeunix.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>	<43f8ba1e$0$2895$626a54ce@news.free.fr>	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>	<43f8cb3f$0$4225$626a54ce@news.free.fr>	<87bqx3glb1.fsf@wilson.homeunix.com>	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com>
Message-ID: <43F9BF25.8040008@gmx.de>

Torsten Bronger wrote:
> Well, I think that it's fair to say that there are by principle deep
> run time differences between CPython and, say, a typical
> C++-compiled program.  Your definition would not reproduce that.  I
> think it's also fair to say that these differences should be known
> if somebody tries to find the best tool for a job.  After all, they
> include advantages, too.
> 
> My definiton would be that an interpreted language has in its
> typical implementation an interpreting layer necessary for typical
> hardware.  Of couse, now we could discuss what is "typical",
> however, in practice one would know it, I think.  In case of Python:
> CPython and all important modern processors.

Well, if we take any modern Intel/AMD chip (which could be described as 
"typical), a C++ program would fit the "interpreted" definition, since 
the processor does not execute the machine code directly but rather 
breaks it down into smaller microcode instruction -- a process that 
could be described as intepretation.

Another problem with the definition: what would you call a C++ program 
that is running on top of an emulator? Does a language become 
interpreted just by running the program on top of an emulator? Why is 
the python interpreter different from an emulator in this respect? I 
think that the disctinction between "interpreted" and "compiled" 
(whatever both means) is really just not sensible at all.

Cheers,

Carl Friedrich



From Andrews333 at aol.com  Wed Feb  8 12:51:50 2006
From: Andrews333 at aol.com (Andrews333 at aol.com)
Date: Wed, 8 Feb 2006 12:51:50 EST
Subject: email extraction program
Message-ID: <141.561ce3ac.311b89b6@aol.com>

hi i contact you because i see this mesage that you have or you want to creat 
a program to extract e-mails from ebay please contact me .i realy want if you 
have it you can give me this program ?

Thanks
-------------- next part --------------
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From gregory.petrosyan at gmail.com  Wed Feb 15 05:43:37 2006
From: gregory.petrosyan at gmail.com (Gregory Petrosyan)
Date: 15 Feb 2006 02:43:37 -0800
Subject: Pythonic gui format?
In-Reply-To: <dstd14$nvl$1@wake.carmen.se>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<dstd14$nvl$1@wake.carmen.se>
Message-ID: <1140000217.196734.46300@g14g2000cwa.googlegroups.com>

Bruno: in your original example, how can it be specified that image
should be placed before text? Of course, it  *can*  be done with one
extra level of wrapping of gui elements in list... did you mean that?

Patrik: thanks a lot!
Stan (the way it represents XML) is almost what I am looking for.



From apardon at forel.vub.ac.be  Wed Feb  1 10:00:10 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 1 Feb 2006 15:00:10 GMT
Subject: howto catch an Exception and still print the TraceBack?
References: <43e073bd$0$341$5fc30a8@news.tiscali.it>
Message-ID: <slrndu1j7q.qei.apardon@rcpc42.vub.ac.be>

Op 2006-02-01, Saizan schreef <sanzhiyan at gmail.com>:
> In an event-driven application i'd like to keep the program alive regardless of any exceptions raised by the handlers,
> but still be able to debug them by reading the appropriate TraceBack from stderr.
> I can put something like:
>
> try:
> 	self.call_handler(handler,*args)
> except Exception, e:
> 	print e
> 	print e.args
>
> in the dispatcher, but that isn't as helpful as a complete TraceBack.

You mean something like this?

    import traceback
    import sys

    try:
        self.call_handler(handler,*args)
    except Exception, e:
        Do_whatever_you need_to_do()
        for msg in traceback.format_tb(sys.exc_info()[2]):
            sys.stderr.write("%s\n" % msg)


From aleaxit at yahoo.com  Tue Feb 21 11:20:35 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Tue, 21 Feb 2006 08:20:35 -0800
Subject: number ranges
References: <e86a5fd00602131854s73191cbbu742d4434ad074908@mail.gmail.com>
	<1139945386.3346.38.camel@pc1.cole.uklinux.net>
	<43F8D881.5030804@sympatico.ca>
	<gfmdnZrrLeHK22TenZ2dnUVZ_tCdnZ2d@comcast.com>
	<43F97AA8.50005@REMOVEMEcyber.com.au>
	<3_WdnUP9qr9XRmTenZ2dnUVZ_sydnZ2d@comcast.com>
	<1hb1umb.wr2hsk1chby86N%aleaxit@yahoo.com>
	<NMuKf.5613$%14.252734@news20.bellglobal.com>
	<1hb2uq1.e7kdkt1z0ge4rN%aleaxit@yahoo.com>
	<43FAD679.2040305@REMOVEMEcyber.com.au>
Message-ID: <1hb3o4u.trzcp41f11vxqN%aleaxit@yahoo.com>

Steven D'Aprano <steve at REMOVEMEcyber.com.au> wrote:
   ...
> > Reread the part I quoted above: at least some of the proponents of this
> > syntax appear to be totally ignorant of 30 years of literature and
> > practice of programming, "it will be tough to convince" them that closed
> > intervals are a terrible mistake and semi-open ones the only way to go.
> 
> I intellectually understand that semi-open intervals 
> are the only way to go. But reading the words, the part 
> of my brain that speaks English cries out for a closed 
> interval. Bad brain.

Human brain -- it's harder for non-native-speakers like me to judge the
associations of certain English words in a native speaker's brain.

> Given the overwhelming benefit of semi-closed 
> intervals, I wish to amend my proposal to follow Alex's 
> suggestions, namely:
> 
> for i in (1 to 10 by 3):
>      print i
> 
> should print 1 4 7.

But that would be an "attractive nuisance" to many other native speakers
like you, who would instinctively think of a closed interval.  Maybe
'upto' rather than 'to', as somebody else suggested, would ease that.

> That would make (a to b by c) equivalent to 
> range(a,b,c) except that it returns an iterator rather 
> than a list. Hmmm... putting it that way, the new 
> syntax actually costs 1 keystroke, or saves 1 if you 
> put spaces after the commas in the range expression. 
> Does it add enough clarity and ease of understanding to 
> justify two new keywords?

No, of course not.  And if we use upto, we'll need a downto as well, a
third keyword, for loops with negative step.  range should return an
iterator in Python 3.0 (maybe in 2010?-) and xrange will then go away,
so the only issue is whether syntax sugar for it is SO badly needed as
to justify 2/3 new keywords.

> > whines about it); Python is clearly much better off if such people run
> > away to Ruby, with its (expletive deleted) a..b AND a...b syntaxes just
> > to ensure maximum confusion;-).
> 
> Ruby uses both .. and ...? Now I'm frightened.

I _like_ Ruby, mostly, but yes, it has both a..b AND a...b, one of them
to indicate a semi-open interval and the other to indicate a closed one
(I believe the three dots are for the semi-open, but it could be the
other way 'round) -- I don't remember how it indicates a step. I do
think this is a wart (lack of visual or mnemonic distinction), though
I'm sure Ruby enthusiasts would not agree.


Alex


From reply.in.the.newsgroup at my.address.is.invalid  Fri Feb 17 06:32:52 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Fri, 17 Feb 2006 12:32:52 +0100
Subject: Databases and python
References: <pan.2006.02.14.08.06.18.754312@dcs.nac.uci.edu>
	<gtf8v1dmu147otntn4ghm9biavq01feuhr@4ax.com>
	<pan.2006.02.17.03.22.11.928784@dcs.nac.uci.edu>
Message-ID: <dscbv1tagf9mrfqkfc49bifjdc0cp05bhl@4ax.com>

Dan Stromberg:
>> My first attempt would be: a BTree with the word as key, and a 'list of
>> filenames' as value.
>> http://www.zope.org/Wikis/ZODB/FrontPage/guide/node6.html#SECTION000630000000000000000
>
>This is basically what I'm doing now, 

Right. My second attempt would be: a BTree with the word as key, and a
BTree of filenames as value (or some other persistent container type
that's not (un)serialized as a whole when only one element changes).

-- 
Ren? Pijlman


From noway at sorry.com  Tue Feb 21 03:48:28 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Tue, 21 Feb 2006 08:48:28 GMT
Subject: Mutable numbers
References: <dteele$9pi$1@home.itg.ti.com>
Message-ID: <wtAKf.1248$A83.40726@twister1.libero.it>

Suresh Jeevanandam wrote:

> In python all numbers are immutable.

True.

> This means there is one object (
> a region in the memory ) created every time we do an numeric
> operation.

False. Memory regions can be pooled in a way that "allocation" is a O(1)
operation.

> I hope there should have been some good reasons why it was
> designed this way.

Yes, so that you can obtain a pass-by-value semantic for numeric types. That
is, if you pass a number to a function, it can't modify it. You consistenly use
"a = foo(a)" to do a calculation on "a", instead of having half programs doing
"foo(a)" and the other half doing "a = foo(a)". Also, it's done so that you
don't need to special case integer literals: they are (fixed) names to the same
immutable instances and nobody can modify the value of 13 or any other literal.

> But why not have mutable numbers also in the language. A type which
> would behave as follows:
>
> a = MutableInt(12)
> b = a
>
> Now both a and b should refer to the same memory location. Any change
> in the object should get reflected in all the references.
>
> a.assign(13) # Same memory location should be updated with value 13, b
> is also 13 now.
>
> Now we can further optimize:
>
> a.incrementOne() # equivalent to a++ in C++
> a.decrementOne()
>
> and the augmented assignment operation also could be made optimized.

So you just created a numeric type which does not work with normal operators.
This is so unpythonic. I don't think anybody wants to write "incrementOne" when
"+ 1" exists and does the same it used to do in primary school. Even if you
overloaded all the operators, you still wouldn't be able to use '=' to do
assignment, which pretty much makes your class useless or very unpythonic to
use (= wrong).

> In any application most of the operation is numerical. So, i think, we
> should get a good speed advantage with the availability of mutable
> numbers. What do you think ?


You are doing premature optimization. It's so premature that it's even a brain
thing. You *presume* Python to be slow, you *presume* that this presumed
slowness comes from numbers being immutables. But you didn't *measure* it, you
didn't try it on a real-world case. You didn't even look at the Python source
code to check if your assumptions were true. Try to check your assumptions
before designing solutions to problems which do not exist. I suggest you start
writing real-world Python before doing so many assumptions.
-- 
Giovanni Bajo




From btaranto at gmail.com  Tue Feb  7 11:46:33 2006
From: btaranto at gmail.com (btaranto at gmail.com)
Date: 7 Feb 2006 08:46:33 -0800
Subject: python-ldap
Message-ID: <1139330793.864675.302090@f14g2000cwb.googlegroups.com>

y0!
where can i get module of python-ldap to work with eclipse ide on
windows?

tks!



From spe.stani.be at gmail.com  Thu Feb  9 08:49:50 2006
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 9 Feb 2006 05:49:50 -0800
Subject: Curios issues with Editors
References: <1139487823.219867.71790@z14g2000cwz.googlegroups.com>
	<mailman.1656.1139488176.27775.python-list@python.org>
	<1139489181.944396.101710@o13g2000cwo.googlegroups.com>
Message-ID: <1139492990.434066.320850@g44g2000cwa.googlegroups.com>

How do you run your code in SPE? I advise you to run it with
Tools>Run/Stop (Ctrl+R) There would be no reason why it wouldn't work.

Stani



From claudio.grondi at freenet.de  Thu Feb 23 05:14:22 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Thu, 23 Feb 2006 11:14:22 +0100
Subject: bsddb3 database file, are there any unexpected file size limits
	occuring in practice?
In-Reply-To: <1140670193.599122.325800@z34g2000cwc.googlegroups.com>
References: <dtj9gc$b33$1@newsreader3.netcologne.de>
	<1140670193.599122.325800@z34g2000cwc.googlegroups.com>
Message-ID: <dtk1u6$118$1@newsreader3.netcologne.de>

Klaas wrote:
> Claudio Grondi wrote:
> 
> 
>>Beside the intended database file
>>   databaseFile.bdb
>>I see in same directory also the
>>   __db.001
>>   __db.002
>>   __db.003
>>files where
>>   __db.003 is ten times as larger as the databaseFile.bdb
>>and
>>   __db.001 has the same size as the databaseFile.bdb .
> 
> 
> I can't tell you exactly what each is, but they are the files that the
> shared environment (DBEnv) uses to coordinate multi-process access to
> the database.  In particular, the big one is likely the mmap'd cache
> (which defaults to 5Mb, I believe).
> 
> You can safely delete them, but probably shouldn't while your program
> is executing.
> 
> 
>>Is there any _good_ documentation of the bsddb3 module around beside
>>this provided with this module itself, where it is not necessary e.g. to
>>guess, that C integer value of zero (0) is represented in Python by the
>>value None returned in case of success by db.open() ?
> 
> 
> This is the only documentation available, AFAIK:
> http://pybsddb.sourceforge.net/bsddb3.html
> 
> For most of the important stuff it is necessary to dig into the bdb
> docs themselves.
Thank you for the reply.

Probably to avoid admitting, that the documentation is weak a positive 
way of stating this was found by using the phrase:

   "Berkeley DB was designed by programmers, for programmers."

So I have to try to get an excavator ;-) to speed up digging the docs 
and maybe even the source, right?

Are there online somewhere any useful simple examples of applications 
using the Berkeley DB I could learn from?

I am especially interested in using the multimap feature activated using 
db.set_flags(bsddb3.db.DB_DUPSORT) and fear, that after the database 
file size will grow during mapping tokens to the files they occur in (I 
have appr. 10 million files which I want to build a search index for) I 
will hit some unexpected limits and the project will fail like it 
happened to me once in the past when I tried to use MySQL for similar 
purpose (after the database file has grown over 2 GByte MySQL just began 
to hang when trying to add some more records).
I am on a Windows using the NTFS file system, so I don't expect problems 
with too large file size. In between I have also already working Python 
code performing the basic database operations I will need to feed and 
query the database.
Has someone used Berkeley DB for similar purpose and can tell me, that 
actually in practice (not in theory stated in the feature list of the 
Berkeley DB) I must not fear any problems?
It took me some days of continuous updating the MySQL database to see, 
that there is an unexpected strange limit for the database file size. I 
still have no idea what the actual cause of the problem with MySQL was 
(I suppose it in having only 256 MB RAM available that time) as it is 
known that MySQL databases larger than 2 GByte exist and are in daily 
use :-( .

This are the reasons why I would be glad to hear how to avoid running 
into a similar problem again _before_ I start to torture my machine with 
filling the appropriate Berkeley DB database with entries.

Claudio

> 
> -Mike
> 


From lycka at carmen.se  Mon Feb 27 13:36:57 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Mon, 27 Feb 2006 19:36:57 +0100
Subject: problem(s) with import from parent dir: "from ../brave.py import
	sir_robin"
In-Reply-To: <1140792405.276665.71280@v46g2000cwv.googlegroups.com>
References: <1140786637.451247.16210@e56g2000cwe.googlegroups.com>
	<mailman.2396.1140788093.27775.python-list@python.org>
	<1140790231.071029.236550@i40g2000cwc.googlegroups.com>
	<mailman.2398.1140791484.27775.python-list@python.org>
	<1140792405.276665.71280@v46g2000cwv.googlegroups.com>
Message-ID: <dtvgs9$gl0$1@wake.carmen.se>

per9000 wrote:
> ...and there was much rejoicing... Even better, thanks - you guys are
> the best.
> 
> import string, time, sys
> sys.path.append("../../py_scripts")
> 
> Works just nice, and yes, I removed the env.variable before I tried it
> :-D

The *right* thing to do might be to install the python libs
in the correct places. Probably under the site-packages
directory. Take a look at the distutils package.

http://www.python.org/doc/lib/module-distutils.html

It can even build Windows installers and RPMs.

These days there are also spiffy things, such as Python eggs,
ez_setup.py, PYPI and whatever it's called, but I haven't
tried those things.


From exarkun at divmod.com  Fri Feb 17 21:09:12 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Fri, 17 Feb 2006 21:09:12 -0500
Subject: commenting out blocks of code
In-Reply-To: <pan.2006.02.18.01.36.05.856023@REMOVETHIScyber.com.au>
Message-ID: <20060218020912.6122.2006624257.divmod.quotient.1877@ohm>

On Sat, 18 Feb 2006 12:36:06 +1100, Steven D'Aprano <steve at removethiscyber.com.au> wrote:
> [snip]
>
>Commenting and uncommenting should be two different commands: the whole
>point of nested comments is that it allows you to comment a block of text
>which may already contain comments. Having one command do both commenting
>and uncommenting according to the presence or absence of semantic clues in
>the text is a recipe for failure ("No you stupid computer, I want to
>COMMENT that block, not uncomment it!!!").
>
>Imagine if your text editor used cntl-C for both copy and paste, somehow
>guessing whether you wanted to copy selected text or paste over it
>according to some subtle clue in the text itself. Wouldn't that be fun?
>

emacs' comment-dwim (M-;) has never guessed incorrectly, in my experience.  Of course, if it ever does, I can always invoke comment-region or uncomment-region, as appropriate.

>
>
>--
>Steven.
>
>--
>http://mail.python.org/mailman/listinfo/python-list
>


From eoinrogers at gmail.com  Sun Feb  5 14:12:28 2006
From: eoinrogers at gmail.com (Byte)
Date: 5 Feb 2006 11:12:28 -0800
Subject: Learning Python
In-Reply-To: <ds5gun$8v6$1@apollon.grec.isp.9tel.net>
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
	<1139156577.897100.69140@g43g2000cwa.googlegroups.com>
	<mailman.1439.1139157505.27775.python-list@python.org>
	<1139158796.288778.244000@z14g2000cwz.googlegroups.com>
	<ds5c0n$cej$2@aphrodite.grec.isp.9tel.net>
	<1139159843.488988.279770@g43g2000cwa.googlegroups.com>
	<1139160795.149427.120760@g44g2000cwa.googlegroups.com>
	<ds5gun$8v6$1@apollon.grec.isp.9tel.net>
Message-ID: <1139166748.487806.175850@g44g2000cwa.googlegroups.com>

I asked to keep it simple! Anyway, ill try Dive into Python, thanks



From grahn+nntp at snipabacken.dyndns.org  Sun Feb 12 16:04:26 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 12 Feb 2006 21:04:26 GMT
Subject: Netstat in python. Does it's possible?
References: <s1mHf.5180$9G6.428@tornado.fastwebnet.it>
	<43EE0286.5020409@v.loewis.de>
	<slrndusfol.2t1.grahn+nntp@frailea.sa.invalid>
	<43EE7B7E.5050802@v.loewis.de>
Message-ID: <slrnduv78b.2t1.grahn+nntp@frailea.sa.invalid>

On Sun, 12 Feb 2006 01:04:14 +0100, Martin v. L?wis <martin at v.loewis.de> wrote:
> Jorgen Grahn wrote:
>> There might still be a problem for people doing things like this: netstat
>> might use unstable or non-public APIs to find the things it lists. This is
>> fine because it's typically your OS vendor who have to handle that (ship
>> another netstat when the /proc or /sys file system layout changes, etc).
>
> Right. However, on Unix, there aren't really that much "non-public"
> APIs. If you can figure out what the system call number is, and you
> have /usr/include/sys, you can typically come up with a way to call
> this API.

I was thinking mostly about /proc, /sys and related file systems. I have a
feeling parts of them they change quite frequently under Linux, and of
course under other Unices they may look completely different, or be absent.

Like Mr Laird said elsewhere, the best thing might be to popen() netstat
and parse its output.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From deets at nospam.web.de  Sat Feb 18 17:38:14 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 18 Feb 2006 23:38:14 +0100
Subject: 2-dimensional data structures
In-Reply-To: <45pk2dF7o7egU1@individual.net>
References: <43ss7mF1n4eg5U1@individual.net>
	<mailman.1110.1138311076.27775.python-list@python.org>
	<45pk2dF7o7egU1@individual.net>
Message-ID: <45plumF7tr0nU1@uni-berlin.de>

> However, I wondering how to approach the search of the nine regions of 
> the grid. I am thinking of producing another nested list, again 9x9 to 
> store the contents of each region, and to update this after each pass 
> through -and update of- the main grid (row and column).
> 
> I am not sure how to most efficiently identify which region any given 
> square on the grid is actually in - any thoughts, for those that have 
> done this? - I don't want a massive list of IF conditionals if I can 
> avoid it.

The question is not so much which region a give square is in, but more 
which square contains which fields. If we assume that you number your 
squares row-wise (top-left zero, top-right 3, bottom-right 9), this 
function computes the field indices that a given square is composed of:

def scoords(n):
     square_row = n / 3
     square_col = n % 3
     start_row = square_row * 3 # ( this is _not_ n!!)
     start_column = square_col * 3
     for x in xrange(start_column, start_column + 3):
         for y in xrange(start_row, start_row + 3):
             yield (x,y)

print list(coords(4))

Regards,

Diez


From steve at REMOVETHIScyber.com.au  Thu Feb 23 10:57:29 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 24 Feb 2006 02:57:29 +1100
Subject: Detec nonascii in a string
References: <mailman.2354.1140708758.27775.python-list@python.org>
Message-ID: <pan.2006.02.23.15.57.29.550834@REMOVETHIScyber.com.au>

On Thu, 23 Feb 2006 12:32:35 -0300, Sebastian Bassi wrote:

> Hello,
> 
> How do I detect non-ascii letters in a string?
> I want to detect the condition that a string have a letter that is not
> here: string.ascii_letters

for c in some_string:
    if c not in string.ascii_letters:
        raise ValueError("Non-ascii value!!!")

Instead of raising an error, you can take whatever action you prefer:

for c in some_string:
    if c not in string.ascii_letters:
        print "Character '%s' is non-ascii." % repr(c)

Or turn it into a function:

def isascii(s):
    for c in some_string:
        if c not in string.ascii_letters:
            return False
    return True
    

-- 
Steven.



From fakeaddress at nowhere.org  Wed Feb  8 16:14:33 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Wed, 08 Feb 2006 21:14:33 GMT
Subject: Question about idioms for clearing a list
In-Reply-To: <dsd311$qlp$1@wake.carmen.se>
References: <mailman.1294.1138727665.27775.python-list@python.org>	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>	<mailman.1489.1139232969.27775.python-list@python.org>	<ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>	<mailman.1537.1139297533.27775.python-list@python.org>	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>	<mailman.1546.1139320907.27775.python-list@python.org>	<dscdtr$ciu$1@wake.carmen.se>
	<mailman.1594.1139403378.27775.python-list@python.org>
	<dsd311$qlp$1@wake.carmen.se>
Message-ID: <ZatGf.28418$F_3.14242@newssvr29.news.prodigy.net>

Magnus Lycka wrote:
> Ed Singleton wrote:
> 
>> The point is that having to use del to clear a list appears to the
>> inexperienced as being an odd shaped brick when they've already used
>> the .clear() brick in other places.
> 
> 
> Agreed. The smart way to go from this stage of surprise is
> not to assume that Python is broken, but to try to understand
> how lists are different from e.g. dicts, and why the so-much-
> smarter-than-me Python designers made it like this.

That two of Python's three built-in mutable collections support
clear() is clearly a historical artifact.

> Not that Python is perfect, but when you don't get a
> "sorry, this change would break existing code, won't happen
> until Python 3.0"-resonse, but a "study this more"-response,
> the smart thing is to open your mind and try to fully grok
> this.

The original question was about idioms and understanding, but
there's more to the case for list.clear. Python is "duck typed".
Consistency is the key to polymorphism: type X will work as an
actual parameter if and only if X has the required methods and
they do the expected things.

Emptying out a collection is logically the same thing whether
that collection is a list, set, dictionary, or user-defined
SortedBag. When different types can support the same operation,
they should also support the same interface. That's what
enables polymorphism.


-- 
--Bryan


From steve at holdenweb.com  Wed Feb 15 08:51:08 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 15 Feb 2006 08:51:08 -0500
Subject: Python and ASP
In-Reply-To: <1139969137.852649.19580@f14g2000cwb.googlegroups.com>
References: <1139958137.733403.33640@g44g2000cwa.googlegroups.com>	<1139961021_9771@sp6iad.superfeed.net>	<1139967580.352137.246320@f14g2000cwb.googlegroups.com>	<1139968235_9917@sp6iad.superfeed.net>
	<1139969137.852649.19580@f14g2000cwb.googlegroups.com>
Message-ID: <dsvbk8$39k$1@sea.gmane.org>

Tempo wrote:
> What do you mean? I can't just upload the file to the server that is
> going to host my site?
> 
Note that the language identifier directive

<%@ Language=Python %>

should come right at the top of the file to do any good.

Is this an ISP-managed web server? If so it's possible that they haven't 
(and may not want to) installed the Active Scripting features of Python 
that come with the win32all extensions.

I can't remember offhand whether a separate step is necessary after 
installing win32all, but without those extensions IIS just won't 
recognize Python as an Active Scripting language.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From mcfletch at rogers.com  Tue Feb  7 10:47:46 2006
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Tue, 07 Feb 2006 10:47:46 -0500
Subject: Collecting snmp data - threads, processes, twisted?
In-Reply-To: <43E270C5.6030601@mimoza.pantel.net>
References: <43E270C5.6030601@mimoza.pantel.net>
Message-ID: <43E8C122.508@rogers.com>

Antal Rutz wrote:
...
> I'd like to collect snmp data from varoius network devices parallel.
>   
...
> Could you give me some advice how can I make my script really parallel?
>
> My options maybe:
> 1. pySNMP (as it's full in python)
> 2. subprocess (I'd like to make (find) a solution as threadpool.py)
>     (running yapsnmp, pySNMP or even net-snmp?...)
> 3. TwistedSNMP (seems too weird for me.. cannot imagine a simple 
> solution for my problem)
>   
This kind of parallel mass-query operation is TwistedSNMP's primary 
focus (it was created for a commercial product that scans thousands of 
agents).  If you really want all of the queries to run in parallel (i.e. 
send out all the queries within milliseconds of each other):

    agents = [ ... ]
    dl = []
    for agent in agents:
        dl.append( agent.get( (oid,oid,oid) ) )
    return defer.DeferredList( dl )

add a callback to the DeferredList which processes the 
(success,result_or_failure) list you get back.  If you want to process 
individual results/failures before the whole set returns, add the 
callback for that to the agent.get() result.

If you have thousands of devices you'll likely want to batch the queries 
into ~ 200 simultaneous queries and/or use multiple protocols (gives you 
more OS-level buffering).

Have fun,
Mike

________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://www.vrplumber.com
  http://blog.vrplumber.com



From modelnine at bit-bukket.org  Tue Feb 28 18:11:28 2006
From: modelnine at bit-bukket.org (Heiko Wundram)
Date: Wed, 01 Mar 2006 00:11:28 +0100
Subject: MySQLdb compile error with AMD64
References: <mailman.2523.1141152022.27775.python-list@python.org>
Message-ID: <du2l4s$pgp$1@online.de>

keith at nekotaku.com wrote:

> Can anyone offer any assistance on this one?

Look here:

>> gcc -pthread -fno-strict-aliasing -DNDEBUG -O2 -fmessage-length=0 -Wall
>> -D_FORTIFY_SOURCE=2 -g -fPIC -I/usr/include/mysql
>> -I/usr/include/python2.4 -c _mysql.c -o
>> build/temp.linux-x86_64-2.4/_mysql.o -I/usr/include/mysql -g
>> -march=i586 -mcpu=i686 -fmessage-length=0

specifically at -march=i586. MySQLdb sets CFLAGS which aren't applicable to
your processor, and as such the compile barfs. You should probably just run
it with something like

CFLAGS="-march=athlon-64" python setup.py build

I am positive that MySQLdb works on AMD64, I have it running there. Anyway,
the CFLAGS fix should work.

--- Heiko.


From peter.maas at somewhere.com  Mon Feb 13 18:19:13 2006
From: peter.maas at somewhere.com (Peter Maas)
Date: Tue, 14 Feb 2006 00:19:13 +0100
Subject: how do you pronounce 'tuple'?
In-Reply-To: <dsr41u$1uo$1@online.de>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
	<mailman.1857.1139863723.27775.python-list@python.org>
	<Wj6If.1606$No6.38150@news.tufts.edu> <dsqtq7$mju$1@online.de>
	<nhv1v1lslk16i4u2v6ttrdpo0ju9d8h5qn@4ax.com>
	<dsr41u$1uo$1@online.de>
Message-ID: <dsr45l$1uo$2@online.de>

Peter Maas schrieb:
> But tuples mean threefold, twofold etc. and the Latin equivalents
 > are triplex duplex simples.

triplex duplex simplex

Peter Maas, Aachen


From exarkun at divmod.com  Wed Feb 15 19:05:43 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Wed, 15 Feb 2006 19:05:43 -0500
Subject: is socket thread safe?
In-Reply-To: <43F39617.9050006@mvista.com>
Message-ID: <20060216000543.6122.373845425.divmod.quotient.20@ohm>

On Wed, 15 Feb 2006 12:59:03 -0800, "Carl J. Van Arsdall" <cvanarsdall at mvista.com> wrote:
>Steve Horsley wrote:
>> e2wugui at gmail.com wrote:
>>
>>> thread1:
>>>     while 1:
>>>         buf = s.read()
>>>         process(buf)
>>>
>>> thread2:
>>>     while 1:
>>>         buf = getdata()
>>>         s.write(buf)
>>>
>>>
>>
>> It is safe, but watch out for this gotcha: If thread B calls
>> s.close() while thread A is blocked in s.read(), thread A will
>> never return from the read. My preferred solution is to set
>> socket timeout to a few seconds, and loop checking a status flag
>> so I know when to quit.
>>
>>
>I think a better thing would be to use something like a condition object
>to tie the two threads together and not use any polling loops.
>
>i.e.  consumer goes to sleep while data buffer is empty, producer
>produces and signals condition object, consumer wakes up and consumes.

What makes you think process isn't implemented to notify a condition, and getdata isn't implemented to wait on one? :)

Jean-Paul


From not at bleedin.likely  Sun Feb 12 17:11:58 2006
From: not at bleedin.likely (HappyHippy)
Date: Sun, 12 Feb 2006 22:11:58 +0000
Subject: Another n00b: Removing the space in "print 'text', var"
Message-ID: <43efb1ba$0$14855$c3e8da3@news.astraweb.com>

More of a minor niggle than anything but how would I remove the 
aforementioned space?

eg.
strName = 'World'
print 'Hello', strName, ', how are you today?'

comes out as "Hello World , how are you today?"

Have googled, and worked my way through the first 7 chapters of Byte of 
Python, but to no avail...

TIA

HH


From k.suess at gmx.net  Mon Feb 27 15:46:34 2006
From: k.suess at gmx.net (Katja Suess)
Date: Mon, 27 Feb 2006 21:46:34 +0100
Subject: expat
Message-ID: <4403652A.2040205@gmx.net>

Hi,
may I have a hint what the problem is in my situation?
Is it a syntax error in sweetone.odt or in xml.parsers.expat?
Same problem with different file instead of sweetone.odt means that it's not the file that has a syntax error.
xml.parsers.expat is a standard module that probably has no errors.
So what could cause this error message??

Traceback (most recent call last):
  File "mytest.py", line 5, in ?
    r = c.convert(s, 'HTML','sweetone.odt').decode('base64')
  File "/Users/katjasuess/links/soffice/python-core/lib/xmlrpclib.py", line 1029, in __call__
    return self.__send(self.__name, args)
  File "/Users/katjasuess/links/soffice/python-core/lib/xmlrpclib.py", line 1316, in __request
    verbose=self.__verbose
  File "/Users/katjasuess/links/soffice/python-core/lib/xmlrpclib.py", line 1080, in request
    return self._parse_response(h.getfile(), sock)
  File "/Users/katjasuess/links/soffice/python-core/lib/xmlrpclib.py", line 1214, in _parse_response
    p.feed(response)
  File "/Users/katjasuess/links/soffice/python-core/lib/xmlrpclib.py", line 528, in feed
    self._parser.Parse(data, 0)
xml.parsers.expat.ExpatError: syntax error: line 1, column 0

Regards, Katja


From plahey at alumni.caltech.edu  Fri Feb 10 19:43:30 2006
From: plahey at alumni.caltech.edu (plahey at alumni.caltech.edu)
Date: 10 Feb 2006 16:43:30 -0800
Subject: arrays in python
In-Reply-To: <pan.2006.02.11.00.19.02.766817@REMOVETHIScyber.com.au>
References: <mailman.1727.1139613159.27775.python-list@python.org>
	<pan.2006.02.11.00.19.02.766817@REMOVETHIScyber.com.au>
Message-ID: <1139618610.170341.142000@g43g2000cwa.googlegroups.com>

> Oh, don't tell me, I love playing guessing games!

Don't you mean "No no... don't tell me. I'm keen to guess."

Sorry, I couldn't resist... :-)

(for those who just went huh?, see
http://www.aldo.com/sgt/CheeseShoppeSkit.htm)



From fredrik at pythonware.com  Sun Feb 19 14:32:39 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 19 Feb 2006 20:32:39 +0100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<yfspsljp321.fsf@oc.ex.ac.uk>
Message-ID: <dtah4q$244$1@sea.gmane.org>

Alexander Schmolck wrote:

> What's far more interesting to me, however, is that I think there a good
> reasons to suspect python's slowness is more of a feature than a flaw: I'd not
> be suprised if on the whole it greatly increases programmer productivity and
> results in clearer and more uniform code.

> So ironically, some share of python's success might actually be due to
> ignorance on Guido's part

it didn't, for even a millisecond, strike you that maybe, just maybe, the
"make it as dynamic as we possibly can" choice was made on purpose ?

</F>





From carsten at uniqsys.com  Fri Feb 17 11:30:36 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 17 Feb 2006 11:30:36 -0500
Subject: Checkbuttons in a Text widget
In-Reply-To: <1140190108.192983.287630@g14g2000cwa.googlegroups.com>
References: <1140190108.192983.287630@g14g2000cwa.googlegroups.com>
Message-ID: <1140193836.32102.66.camel@dot.uniqsys.com>

On Fri, 2006-02-17 at 10:28, Lou G wrote:
> I'm trying to show a number of Checkbuttons (each with associated text
> based on a list of names) inside a y-scrollable Text widget like so:
> 
> [ ] Bob
> [ ] Carol
> [ ] Ted
> [ ] Alice
> etc.
> etc.
> 
> There may be quite a few (as many as 100 or so). I'm uncertain as to
> the correct way to get these into the Text widget. I've tried
> text.insert and it doesn't seem to do the job. Help?

Does it have to be a text widget? wxWidgets has a wxCheckListBox class
that does precisely what you need, but it's not a text widget.

HTH,

Carsten.




From erniedude at gmail.com  Tue Feb  7 15:33:27 2006
From: erniedude at gmail.com (Ernesto)
Date: 7 Feb 2006 12:33:27 -0800
Subject: * 'struct-like' list *
In-Reply-To: <43e8c362.179938698@news.oz.net>
References: <1139245389.529742.317110@g43g2000cwa.googlegroups.com>
	<43e8c362.179938698@news.oz.net>
Message-ID: <1139344407.091793.244550@g44g2000cwa.googlegroups.com>

Thanks tons !



From grahn+nntp at snipabacken.dyndns.org  Sun Feb 12 16:17:14 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 12 Feb 2006 21:17:14 GMT
Subject: Determining an operating system's default browser
References: <mailman.1690.1139528346.27775.python-list@python.org>
	<43EBD5E1.1040501@websafe.com>
	<mailman.1692.1139530731.27775.python-list@python.org>
	<1139572261.172035.194190@g14g2000cwa.googlegroups.com>
	<slrndusd7l.2t1.grahn+nntp@frailea.sa.invalid>
	<1139687069.810143.117040@g43g2000cwa.googlegroups.com>
Message-ID: <slrnduv80a.2t1.grahn+nntp@frailea.sa.invalid>

On 11 Feb 2006 11:44:29 -0800, Paul Boddie <paul at boddie.org.uk> wrote:
> Jorgen Grahn wrote:
...
>> On my machines, there is One Correct Way of doing these things, and that's
>> to look in the MIME support/configuration files (~/.mailcap, and so on),
>> first for the user, then system-wide. Something there might tell you what
>> program should handle text/html content.
>
> Indeed. Thanks for reminding me about mailcap/metamail - I used them in

And thanks for mentioning the real name of that mechanism!

...
> import mailcap

I guess I shouldn't be surprised that there is a standard module
for that ... ;-)

...
> Sadly, when considering my KDE desktop's default browser, inquiring the
> application for HTML files yields Mozilla Firefox from my mailcap file.

Yes, but that's only because you haven't configured your mailcap, right?
Which might be a real problem -- most people don't touch their .mailcaps,
especially those who use KDE or Gnome.

Also, sometimes you want a GUI browser to open, and sometimes you want a
console-based one like lynx or w3m.  I guess most people who use mailcap do
so because they use console-based mail readers, and thus want the HTML stuff
appear inside the same terminal.  Another reason this might be unsuitable
for the OP.

So, while I called it "The One Correct Way" above, I admit it might not be a
very good way ;-)

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From kent at kentsjohnson.com  Thu Feb 23 18:01:32 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Thu, 23 Feb 2006 18:01:32 -0500
Subject: How would you open this file?
In-Reply-To: <1140735212.419265.219980@e56g2000cwe.googlegroups.com>
References: <1140735212.419265.219980@e56g2000cwe.googlegroups.com>
Message-ID: <43fe3a41$1_1@newspeer2.tds.net>

Bob wrote:
> I want to open a file in a function and pass the file back to main so
> another function can manipulate the file, something like this:
> 
> # begin
> def open_file()
>   filename=open(options.filename_input,'r')
>   return filename
> 
> open_file()
> print filename.read()
> filename.close()
> # end

You need to assign the result of open_file() to a variable. The 
'filename' variable inside open_file() is not available outside the 
function:

filename = open_file()

By the way 'filename' is a pretty bad name, since it contains a file 
object, not a string. Maybe call it f instead. ('file' is also a bad 
name because it is the name of a Python built-in function.)

Kent


From mooquack at suad.org  Fri Feb  3 17:49:27 2006
From: mooquack at suad.org (Kirk McDonald)
Date: Fri, 03 Feb 2006 14:49:27 -0800
Subject: Automatic class attribute
In-Reply-To: <mailman.1398.1139005691.27775.python-list@python.org>
References: <mailman.1398.1139005691.27775.python-list@python.org>
Message-ID: <43e3dcfb$1@nntp0.pdx.net>

Franck PEREZ wrote:
> Hello all,
> 
> Considering the following code :
> 
> class C(object):
>    ...:     observers = []
>    ...:
>    ...:     @classmethod
>    ...:     def showObservers(cls):
>    ...:         print cls.observers
> 
> class D1(C):
>    ...:     observers = [] #could it be moved in C ?
> 
> class D2(C):
>    ...:     observers = [] #could it be moved in C ?
> 
> I want each child class of C to have it's own "observers" class attribute.
> 
> The code I provided works... but I'd like to avoid typing "observers =
> []" in each child class.
> 
> Is it possible to define something in C which would basically mean :
> "for each child class, automatically bind a new list attribute called
> observers" ?
> 
> Are metaclasses a way ? Is it possible to avoid them ?
> Thanks a lot,
> Franck

By an astounding coincidence, I was just working on a similar problem. 
Metaclasses can do this, no problem:

class M(type):
     def __init__(cls, name, bases, dict):
         cls.observers = []

     def showObservers(cls):
         print cls.observers

class C(object):
     __metaclass__ = M

class D1(C): pass
class D2(C): pass

-Kirk McDonald


From sw at wordtech-software.com  Fri Feb 10 23:35:28 2006
From: sw at wordtech-software.com (Kevin Walzer)
Date: Fri, 10 Feb 2006 23:35:28 -0500
Subject: Yet another GUI toolkit question...
In-Reply-To: <m2d5huwof8.fsf@unique.fqdn>
References: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
	<m2d5huwof8.fsf@unique.fqdn>
Message-ID: <43ED6990.1020707@wordtech-software.com>

Dan Sommers wrote:
> On Fri, 10 Feb 2006 19:16:36 -0500,
> Kevin Walzer <sw at wordtech-software.com> wrote:
> 
>> For what it's worth, my application has to run on OS X and Windows,
>> and will be commercial, so this combination of requirements rules out
>> PyGTK/PyQt/just about every other cross-platform GUI toolkit.
> 
> According to their respective web sites, both Qt and PyQt have
> commercial licenses, and both run on both OS X and Windows.  Is there
> another reason you cannot use them?  Usually the concern is the other
> way around, that the Qt and PyQt licenses aren't sufficiently free or
> Free.
> 
> Disclaimer:  I have no financial or business ties to Trolltech or to
> Riverbank.
> 
> Regards,
> Dan
> 

Commercial Qt is a little out of my price range.

-- 
Kevin Walzer
iReveal: File Search Tool
http://www.wordtech-software.com


From python at rcn.com  Sat Feb 18 21:55:22 2006
From: python at rcn.com (Raymond Hettinger)
Date: 18 Feb 2006 18:55:22 -0800
Subject: Multiplication optimization
In-Reply-To: <1140310118.365847.111120@g14g2000cwa.googlegroups.com>
References: <1140310118.365847.111120@g14g2000cwa.googlegroups.com>
Message-ID: <1140317722.448524.243300@g44g2000cwa.googlegroups.com>

[Paul McGuire]
> Does Python's run-time do any optimization of multiplication
> operations, like it does for boolean short-cutting?

Usually, it is safest (and typically true) to assume that Python
performs no optimizations.  To go beyond making assumptions, it is easy
to run a few timings:

>>> from timeit import Timer
>>> min(Timer('0*1234567').repeat(5))
0.11315376674968469
>>> min(Timer('1*1234567').repeat(5))
0.11920453577200618
>>> min(Timer('113*1234567').repeat(5))
0.11881482143680699

In your specific case, I can answer than the source shows no special
optimization for multiplications by specific values.  There is a
short-path for integer multiplications but it is not value specific.
In Py2.5, the compiler will do a limited amount of constant folding;
however, its scope is somewhat limited because expressions like a*3
vary depending on the a's type which is often not knowable by the
compiler without some form of global analysis.

One other thought:  Python is not assembly.  Run time is unlikely to be
dominated by the time to execute a multiplication.  With Python, it is
best to focus optimization efforts on making choosing the best data
structures and hoisting constants out of loops.


Raymond



From no at spam.com  Tue Feb 14 21:21:45 2006
From: no at spam.com (DH)
Date: Tue, 14 Feb 2006 20:21:45 -0600
Subject: Embedding an Application in a Web browser
In-Reply-To: <43f1fa4a$0$4780$636a55ce@news.free.fr>
References: <1139930045.408507.151440@g43g2000cwa.googlegroups.com>
	<43f1fa4a$0$4780$636a55ce@news.free.fr>
Message-ID: <t9mdncvHu9ivDW_eRVn-oA@comcast.com>

bruno at modulix wrote:
> rodmc wrote:
>> Is it possible to embed a Python application within Internet explorer?
> 
> No. Nor in any other browser (except from Grail, but I think this
> doesn't count).

You can if you use IronPython.  Of course it will only work with
Internet Explorer on windows.
Java and JVM languages are of course much better for applets: jython, 
groovy, jruby, etc.  I don't know if jython or jruby applets are 
actually possible however since it is interpreted.


>> However if someone clicks
>> on a shape it should open up another application, such as Word.
> 
> Lol. This would be a really big bad security issue.

Look up Microsoft's smart client api.  It is their answer to java web start.


From johnzenger at gmail.com  Tue Feb 28 18:26:36 2006
From: johnzenger at gmail.com (johnzenger at gmail.com)
Date: 28 Feb 2006 15:26:36 -0800
Subject: Rounding up to the nearest exact logarithmic decade
In-Reply-To: <1141165716.023456.318240@u72g2000cwu.googlegroups.com>
References: <1141165716.023456.318240@u72g2000cwu.googlegroups.com>
Message-ID: <1141169196.826108.122460@i39g2000cwa.googlegroups.com>

I like Fredrik's solution.  If for some reason you are afraid of
logarithms, you could also do:

>>> x = 4978
>>> decades = [10 ** n for n in xrange(-1,8)]
>>> import itertools
>>> itertools.ifilter(lambda decade: x < decade, decades).next()
10000

BTW, are the python-dev guys aware that 10 ** -1 = 0.10000000000000001 ?



From bearophileHUGS at lycos.com  Thu Feb 23 05:44:42 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 23 Feb 2006 02:44:42 -0800
Subject: make a class instance from a string ?
In-Reply-To: <mailman.2340.1140687820.27775.python-list@python.org>
References: <mailman.1955.1140018042.27775.python-announce-list@python.org>
	<mailman.2340.1140687820.27775.python-list@python.org>
Message-ID: <1140691482.269913.138900@g14g2000cwa.googlegroups.com>

Bo Yang:
> to get an instance of the class 'classname' from a
> string , in python , how do I do that ?

This is a possibile way:

class C: pass
c = locals()["C"]()
print c

Bye,
bearophile



From juho.schultz at helsinki.fi  Fri Feb 10 05:51:54 2006
From: juho.schultz at helsinki.fi (Juho Schultz)
Date: Fri, 10 Feb 2006 12:51:54 +0200
Subject: Determining an operating system's default browser
In-Reply-To: <mailman.1690.1139528346.27775.python-list@python.org>
References: <mailman.1690.1139528346.27775.python-list@python.org>
Message-ID: <dshr89$rgv$1@oravannahka.helsinki.fi>

John McMonagle wrote:
> Is there a python module which can determine an operating system's
> default web browser application.
> 
> I would like to use it in the following context:  I have a GUI
> application where all the documentation is written as html pages.  I
> wish to have these html help pages open in the default browser when
> selected from the application's Help menu
> 
> If python can determine the path to the default browser, I can then just
> spawn it.
> 
> Regards,
> 
> John McMonagle
> 
> 
> 
I think the htmlview command is used for this purpose (displaying html 
documentation of applications) on many Linuxes. So you could try 
os.system('htmlview'). Given the variety of Unixes (and even Linuxes) 
out there this is not a general solution.

So I would try htmlview first. If it does not work, the program could 
ask the user for his favourite browser the 1st time he looks at docs, 
and save this to a configuration file.


From twic at urchin.earth.li  Fri Feb  3 11:37:57 2006
From: twic at urchin.earth.li (Tom Anderson)
Date: Fri, 3 Feb 2006 16:37:57 +0000
Subject: would it be feasable to write python DJing software
In-Reply-To: <druc1r$cre$1@bagan.srce.hr>
References: <1138925819.465108.181760@o13g2000cwo.googlegroups.com>
	<druc1r$cre$1@bagan.srce.hr>
Message-ID: <Pine.LNX.4.62.0602031615111.26207@urchin.earth.li>

On Fri, 3 Feb 2006, Ivan Voras wrote:

> Levi Campbell wrote:
>
>> Hi, I'm thinking about writing a system for DJing in python, but I'm 
>> not sure if Python is fast enough to handle the realtime audio needed 
>> for DJing, could a guru shed some light on this subject and tell me if 
>> this is doable or if I'm out of my fscking mind?

Perhaps surprisingly, it is:

http://www.python.org/pycon/dc2004/papers/6/

At least, you can certainly mix in realtime in pure python, and can 
probably manage some level of effects processing. I'd be skeptical about 
decoding MP3 in realtime, but then you don't want to write your own MP3 
decoder anyway, and the existing ones you might reuse are all native code.

> Any and all mixing would probably happen in some sort of multimedia 
> library written in C (it would be both clumsy to program and slow to 
> execute if the calculations of raw samples/bytes were done in python)

Clumsy? Clumsier than C? No, python isn't as good with binary data as it 
is with text or objects, but on the whole program scale, it's still miles 
ahead of C.

My advice would be to tackle the task in the same way you'd tackle any 
other: write it in pure python, then fall back to native code where it's 
unavoidable. When i say 'pure python', i don't mean 'not using any native 
modules at all', obviously - if someone's written an MP3 decoder, don't 
eschew it because it happens to be in C. Also, bear in mind that resorting 
to native code doesn't automatically mean writing in C - you can start 
doing stuff like moving from representing buffers as lists of ints to 
using NumPy arrays, using the functions in the standard audioop module, 
whatever; if that's not fast enough, rewrite chunks of the code in pyrex 
(a derivative of python that can be compiled to native code, via 
translation to C); if it's still not fast enough, go to C.

Oh, and before you start going native, try running your program under 
psyco.

tom

-- 
Throw bricks at lawyers if you can!


From nickyncy at yahoo.com.hk  Thu Feb  9 06:43:35 2006
From: nickyncy at yahoo.com.hk (Nicky Ng)
Date: Thu, 9 Feb 2006 19:43:35 +0800
Subject: Breadth first problem
Message-ID: <02e801c62d6e$1335e730$034b0893@nsct01>

Hi,

I would like to implement a breadth first serach with Python and read data from a text file with following file format

File structure description
First line contains number of node
Second line contains node id(s) and distance between node id
Last line is -1
<number of node>
<N1><N2><W1>  Each node or distance is separated by space
-1

For the example below, first line represent number of node is 10, second line contains first node id 0, second node id 1, distance between node id 0 and node id 1 is 2

0 is the root (starting node), the aim of the searching program is to find out the shortest path from 0 to a leaf node and print out the node path and value the path distance

Could you give me any idea how to implement this search program with Python?

Example:
10
0 1 2
0 5 3
1 2 2
1 3 4
2 1 3
2 3 1
5 6 3
5 7 1
6 8 1
7 8 1
7 9 2
9 5 3
-1

Outcome:
Possible solution:
Path=0,1,2,3 length=5
Path=0,5,6,8 length=5
Path=0,5,7,8 length=5

Thank you for your help.

I attached program part that I implemented, however, I am not sure what's wrong of the program logic that I cannot get the correct answer.

Nicky.

If you have any idea, could you please reply me at nickyncy at yahoo.com.hk
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From bearophileHUGS at lycos.com  Wed Feb 15 19:29:16 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 15 Feb 2006 16:29:16 -0800
Subject: how to write a C-style for loop?
In-Reply-To: <pan.2006.02.15.12.37.48.626409@REMOVETHIScyber.com.au>
References: <gZednVPdAtumI2_eRVn-jw@rcn.net>
	<xfDIf.178309$65.4923952@twister1.libero.it>
	<pan.2006.02.15.12.37.48.626409@REMOVETHIScyber.com.au>
Message-ID: <1140049756.818979.281070@f14g2000cwb.googlegroups.com>

Steven D'Aprano>That's a completely different question, so of course it
has a completely different answer. Here is one way:<

Other versions without the creation of a list:

for i in (2**n for n in xrange(6)):
    do_something(i)

for i in (1<<n for n in xrange(6)):
    do_something(i)

for i in xrange(6):
    do_something(i<<i)

Bye,
bearophile



From fabioxgn at gmail.com  Sat Feb 25 15:14:34 2006
From: fabioxgn at gmail.com (sapo)
Date: 25 Feb 2006 12:14:34 -0800
Subject: Editable lists in pygtk - Editing wrong cell
Message-ID: <1140898474.543571.23810@u72g2000cwu.googlegroups.com>

Hi all, i m trying to make an editable list with a toggle button, it
shows up and i can edit the list.. but its editing the wrong cell!

If i click on the toggle button on the first cell it sets FALSE on the
last cell of that row, if i change the text of the last cell if changes
another cell text... here is my code:

    tree = self.principal.get_widget("file_list")
    list = gtk.ListStore(str, str)
    #Permite selecionar os arquivos
    toggle = gtk.CellRendererToggle()
    toggle.set_property('activatable', True)
    tree.insert_column_with_attributes(-1, "Convert?", toggle)
    toggle.connect('toggled', self.Select, tree)
    #permite editar a lista
    renderer = gtk.CellRendererText()
    renderer.set_property( 'editable', True )
    renderer.connect('edited', self.Edit, list)
    tree.insert_column_with_attributes(-1, "Artist", renderer, text=0)
    tree.insert_column_with_attributes(-1, "Song", renderer, text=1)
    tree.set_model(list)

  def Select(self,cell,path,model):
    model[path][1] = not model[path][1]
    return
  def Edit(self, cell, path, new_text, model):
    model[path][0] = new_text

What's wrong with it? i m following this example:
http://pygtk.org/pygtk2tutorial/sec-CellRenderers.html#EditableTextCells

thanx in advance



From chasonh at hotmail.com  Sun Feb  5 23:40:31 2006
From: chasonh at hotmail.com (Chason Hayes)
Date: Mon, 06 Feb 2006 04:40:31 GMT
Subject: Literal Escaped Octets
Message-ID: <pan.2006.02.06.04.50.15.325558@hotmail.com>

I am trying to convert raw binary data to data with escaped octets in
order to store it in a bytea field on postgresql server. I could do this
easily in c/c++ but I need to do it in python. I am not sure how to read
and evaluate the binary value of a byte in a long string when it is a non
printable ascii value in python. I read some ways to use unpack from the
struct module, but i really couldn't understand where that would help. I
looked at the MIMIEncode module but I don't know how to convert the object
to a string. Is there a module that will convert the data? It seems to me
that this question must have been answered a million times before but I
can't find anything.



See http://www.postgresql.org/docs/8.1/interactive/datatype-binary.html
for a description of the problem domain.




From http  Mon Feb 13 17:58:31 2006
From: http (Paul Rubin)
Date: 13 Feb 2006 14:58:31 -0800
Subject: hard disk activity
References: <1139850420.902979.71620@o13g2000cwo.googlegroups.com>
	<g9i1v1lbf2rhmgskmkh5f9mt73s67umckk@4ax.com>
	<1139857505.376840.37440@g43g2000cwa.googlegroups.com>
	<1139859890.407497.124870@o13g2000cwo.googlegroups.com>
	<1139863885.755813.324450@g47g2000cwa.googlegroups.com>
	<7xfymn0yda.fsf@ruckus.brouhaha.com>
	<1139864840.300396.170070@o13g2000cwo.googlegroups.com>
	<7xbqxb0xo0.fsf@ruckus.brouhaha.com>
	<1139866059.604198.245040@g44g2000cwa.googlegroups.com>
Message-ID: <7xpslqamso.fsf@ruckus.brouhaha.com>

"VSmirk" <vania.smirk at gmail.com> writes:
> So I'm wondering if you know off-hand which windows port does this
> checksum validation you outlined.

I think rsync has been ported to Windows but I don't know any details.
I don't use Windows.


From steve at holdenweb.com  Mon Feb 20 16:51:58 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 20 Feb 2006 16:51:58 -0500
Subject: getting started, .py file
In-Reply-To: <1140471172.783876.80400@g14g2000cwa.googlegroups.com>
References: <1140471172.783876.80400@g14g2000cwa.googlegroups.com>
Message-ID: <dtddln$f1t$1@sea.gmane.org>

nibiery at hotmail.com wrote:
> I am just getting started with Python, and I think I may be thinking
> about it wrong. I'd like to be able to work interactively with some
> code that I've got in a file. The only interpreted language I have much
> experience with is Tcl/Tk, and in that I would use "source file.tcl" in
> the console to load my source. Is there a similar command in python? I
> know I can run my file as a script, but since I'm just experimenting
> with how the language works, I want to have more flexibility to be able
> to interactively check the contents of variables and define one piece
> at a time. Am I missing something obvious, or am I not thinking about
> Python properly?
> 
Yes. If your code is in "mycode.py" then start up the interactive 
interpreter and enter

import mycode

at the ">>>" prompt. You will now find that names you have defined in 
the mycode module can be referred to as mycode.this, mycode.that and so 
on, allowing you to interactively play with the features of you module.

A related technique (possibly acceptable for interactive testing but 
definitely *not* recommended for production use) is

from mycode import *

which puts the names directly into the importing module's (that is to 
say the interactive interpreter's) namespace and allows you to refer to 
them directly as this, that, and so on.

This interactive design is one on the Python programmer's secret 
weapons, as it makes it so easy to try things out and be sure you have 
got your Python correct.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From python-url at phaseit.net  Mon Feb  6 12:08:03 2006
From: python-url at phaseit.net (Magnus Lycka)
Date: Mon, 06 Feb 2006 17:08:03 GMT
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Feb  6)
Message-ID: <ds7vbu$mbn$1@lairds.us>

QOTW:  "Excessive cleverness can lead to unmaintainable code.  So can
excessive stupidity." -- Alan Morgan

"Also Python code is pretty bare-metal, so that file.write or
socket.write go to the syscall immediately. Try that in Java and you'll
find 30 layers of complex abstractions for doubtful benefits and obvious
slowness." --  Giovanni Bajo


    Want to talk at the Python 14 Conference? Proposals are due Feb. 13th.
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/4778f0e488118d6c
    
    Need fuzzy lookups? It turns out the standard library has what you need!
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/43f3ef0bf88f40d2
    
    Metaclasses don't have to be so difficult...
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/4be7f1d3f1b3f7df

    ActiveState goes solo.  Again.
        http://blogs.activestate.com/activestate/2006/01/activestate_to_.html

    "Nokia ... announced [an agreement] to release the source code for its
    Python for S60 Platform software package ..." by way of SourceForge.
        http://www.ameinfo.com/76819.html             

    If you want a computer with fewer keys than a mobile phone, you can now
    hack away in you favourite programming language on your Apple iPod!
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/cddcdfb99c612213
    
    Yet another program is saved from unwarranted use of regular expressions!
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/32129018480c0121
    
    Yes, it's feasable to write Python DJing software. Hopefully, the OP
    realized that the answer was yes before the thread turned into
    pseudopilosophical drivel.
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/fb73a7701faf10ea
    
    This Object-Oriented stuff takes time to grasp...
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/7e34915a76fa8893
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/869e448765ea4b98
    
    Why make a code generator when you have Python?
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/dfd984102f5f29ed
    

========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Steve Bethard, Tim Lesher, and Tony Meyer continue the marvelous
    tradition early borne by Andrew Kuchling, Michael Hudson and Brett
    Cannon of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and
sponsor the "Python-URL!" project.


From codecraig at gmail.com  Mon Feb 13 10:53:50 2006
From: codecraig at gmail.com (py)
Date: 13 Feb 2006 07:53:50 -0800
Subject: Execute batch script on remote computer
Message-ID: <1139846030.132862.66180@o13g2000cwo.googlegroups.com>

I am trying to execute a batch script on a remote computer.

The batch script looks like:

@echo off
start c:\python24\python.exe c:\a_script.py


Here's the setup:
Computer A (my computer), Computer B (the remote computer).

So I map "W:" to Computer B and then copy the batch script to Computer
B.  Then from within Python on Computer A I run:
import subprocess
subprocess.Popen("W:\\foo.bat")

However, when it runs it says it can't find c:\a_script.py.  It seems
to be trying to look
at Computer A, not Computer B.  How can I do this?

Thanks



From greg.kujawa at gmail.com  Fri Feb 24 14:16:38 2006
From: greg.kujawa at gmail.com (gregarican)
Date: 24 Feb 2006 11:16:38 -0800
Subject: PyQt - multiple window instances?
Message-ID: <1140808598.748272.240790@i39g2000cwa.googlegroups.com>

I have an PyQt app were I need one of the windows to be able to be
opened more than one at a time. When I try to open it I only get one
instance at the same time. The main class is the QWidget() class with a
QGridLayout() displaying the various window components.

Is there a certain flag I need to set or different constructor I need
to use to allow the window to be opened more than one at a time?

Here's a brief snippet of the code that displays the window:

def new_showing(self):
        """ This method creates a new contact showing record. """

        if self.flag == 'KNOWN':
            try:
                test_contact = self.entry_id
            except:
                QMessageBox.warning(self, "Qt CRAM", "There is no
contact record loaded.\nPlease select a contact record first.")
                return

        self.new_show_widget=QWidget()
        self.new_show_widget.resize(240, 280)
        self.new_show_widget.setCaption('Qt CRAM - Contact Showings')

        # Define the Qt layout to be used for the window.
        self.new_show_grid=QGridLayout(self.new_show_widget, 8, 2)

        # bunch of widgets displaying stuff

        self.new_show_widget.show()



From python at rcn.com  Fri Feb 10 05:43:13 2006
From: python at rcn.com (Raymond Hettinger)
Date: 10 Feb 2006 02:43:13 -0800
Subject: Question about idioms for clearing a list
References: <mailman.1489.1139232969.27775.python-list@python.org>
	<pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au>
	<ds83kd$98m$1@sea.gmane.org>
	<mailman.1510.1139250471.27775.python-list@python.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>
	<mailman.1546.1139320907.27775.python-list@python.org>
	<dscdtr$ciu$1@wake.carmen.se>
	<mailman.1594.1139403378.27775.python-list@python.org>
	<dsd311$qlp$1@wake.carmen.se>
	<ZatGf.28418$F_3.14242@newssvr29.news.prodigy.net>
	<dsfej3$1i6$1@wake.carmen.se>
	<cQRGf.54501$PL5.14689@newssvr11.news.prodigy.com>
	<1haij56.14jpj06cl31lkN%aleaxit@yahoo.com>
	<1139561603.918405.167120@g47g2000cwa.googlegroups.com>
	<1139563038.519704.253340@g47g2000cwa.googlegroups.com>
Message-ID: <1139568193.709228.287040@g44g2000cwa.googlegroups.com>

> > If you're asking why list's don't have a clear() method, the answer is
> > that they already had two ways to do it (slice assignment and slice
> > deletion) and Guido must have valued API compactness over collection
> > polymorphism.  The latter is also evidenced by set.add() vs
> > list.append() and by the two pop() methods having a different
> > signatures.
[bonono]
> Sounds to me that it is a preference(style, whatever), rather than some
> other posts of this thread argued that "del L[:]" is better.

It was simply design decision reflecting Guido's values on language
economics.


> > If you're asking why your specific case looked so painful, I suspect
> > that it only looked hard because the adaptation was force-fit into a
> > lambda (the del-statement or slice assignment won't work as an
> > expression).  You would have had similar difficulties embedding
> > try/except logic or a print-statement.  Guido, would of course
> > recommend using a plain def-statement:
> >
> >     L = list()
> >     def L_clearer(L=L):
> >         del L[:]
> >     for listbunch in buncher(src, '', L, L.append, L_clearer):
> >         print listbunch
> >
> Is that really "clearer" ? While it is still very localized(just read a
> few lines up for the definition), buncher(src, '', L.append, L.clear)
> seems to be clearer to me, especially there are two similar construct
> on set/dict above,

Hmm, my post was so long that the main points were lost:

* the example was tricky only because of the unnecessary in-place
update requirement

* eliminating that requirement solves the adaptation problem and
simplifies the client code

* the constructor API is polymorphic, use it

* adding clear() doesn't help with the other API variations between
set, list, dict, etc.

* Guido's decision for distinct APIs is intentional (i.e. set.add vs
list.append)

* Alex's adapter PEP is likely a better solution for forcing
polymorphism on unlike APIs

* When a lambda becomes awkward, Guido recommends a separate def

* Guido has no sympathy for atrocities resulting from squeezing
everything into one line

* Alex's example can be simplified considerably:

    def buncher(sourceit, sentinel, constructor):
        for k, g in groupby(sourceit, lambda x: x != sentinel):
            if k:
                yield constructor(g)

    for setbunch in buncher(src, '', set):
        print setbunch

* The improved version has no need for list.clear().   End of story.


Raymond



From ivanf1 at comcast.net  Fri Feb  3 23:09:08 2006
From: ivanf1 at comcast.net (nitro)
Date: 3 Feb 2006 20:09:08 -0800
Subject: cannot install scipy
In-Reply-To: <1139025799.128481.297310@g47g2000cwa.googlegroups.com>
References: <1139013871.122256.202130@g43g2000cwa.googlegroups.com>
	<UsVEf.7441$MF1.4622@fe08.lga>
	<1139025799.128481.297310@g47g2000cwa.googlegroups.com>
Message-ID: <1139026148.647811.58940@g43g2000cwa.googlegroups.com>

I just ran

and had one test fail - any ideas?

>>>> scipy.test(level=1, verbosity=2)

======================================================================
FAIL: check_cdf
(scipy.stats.distributions.test_distributions.test_fatiguelife)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "<string>", line 10, in check_cdf
AssertionError: D = 0.359837284568; pval = 0.000275693346129; alpha =
0.01
args = (1.0108978152946058,)



From larry.bates at websafe.com  Thu Feb 23 11:07:14 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Thu, 23 Feb 2006 10:07:14 -0600
Subject: Unexpected timing results
In-Reply-To: <pan.2006.02.23.15.38.11.944281@REMOVETHIScyber.com.au>
References: <pan.2006.02.23.15.38.11.944281@REMOVETHIScyber.com.au>
Message-ID: <43FDDDB2.7050703@websafe.com>

Steven D'Aprano wrote:
> I have two code snippets to time a function object being executed. I
> expected that they should give roughly the same result, but one is more
> than an order of magnitude slower than the other.
> 
> Here are the snippets:
> 
> def timer1():
>     timer = time.time
>     func = lambda : None
>     itr = [None] * 1000000
>     t0 = timer()
>     for _ in itr:
>         func()
>     t1 = timer()
>     return t1 - t0
> 
> def timer2():
>     timer = time.time
>     func = lambda : None
>     itr = [None] * 1000000
>     t = 0.0
>     for _ in itr:
>         t0 = timer()
>         func()
>         t1 = timer()
>         t += t1 - t0
>     return t
> 
> Here are the results:
> 
>>>> timer1()
> 0.54168200492858887
>>>> timer2()
> 6.1631934642791748
> 
> Of course I expect timer2 should take longer to execute in total,
> because it is doing a lot more work. But it seems to me that all that
> extra work should not affect the time measured, which (I imagine) should
> be about the same as timer1. Possibly even less as it isn't timing the
> setup of the for loop.
> 
> Any ideas what is causing the difference? I'm running Python 2.3 under
> Linux.
> 
> Thanks,
> 
> 
> 

Steven,

In timer2 you are making a million extra calls to timer()
function and doing a million additions and a million
subtractions that are not being done in timer1() function.
I think that is where your "extra" time is located.

-Larry Bates


From jeff at taupro.com  Sun Feb 19 19:34:38 2006
From: jeff at taupro.com (Jeff Rush)
Date: Sun, 19 Feb 2006 18:34:38 -0600
Subject: Removing Non-Unicode Support?
In-Reply-To: <ee2a432c0602191142u16be2dd4n6fd51df62ad84a73@mail.gmail.com>
References: <20060216052542.1C7F21E4009@bag.python.org>	<43F45039.2050308@egenix.com>	<ee2a432c0602161033y5d597090u37386cc8384f8b5c@mail.gmail.com>	<43F5D222.2030402@egenix.com>
	<ee2a432c0602191142u16be2dd4n6fd51df62ad84a73@mail.gmail.com>
Message-ID: <43F90E9E.8060603@taupro.com>

Neal Norwitz wrote:
> On 2/17/06, M.-A. Lemburg <mal at egenix.com> wrote:
> 
>>Neal Norwitz wrote:
> >
>>Another candidate for removal is the --disable-unicode
>>switch.
>>
>>We should probably add a deprecation warning for that in
>>Py 2.5 and then remove the hundreds of
>>#idef Py_USING_UNICODE
>>from the source code in time for Py 2.6.
> 
> I've heard of a bunch of people using --disable-unicode.  I'm not sure
> if it's curiosity or if there are really production builds without
> unicode.  Ask this on c.l.p too.

Such a switch quite likely is useful to those creating Python interpreters 
for small hand-held devices, where space is at a premium.  I would hesitate 
to remove switches to drop features in general, for that reason.

Although I have played with reducing the footprint of Python, I am not 
currently doing so.  I could never get the footprint down sufficiently to 
make it usable, unfortunately.  But I would like to see the Python 
developers maintain an awareness of memory consumption and not assume that 
Python is always run on modern fully-loaded desktops.  We are seeing 
increasing use of Python in embedded systems these days.

-Jeff


From http  Thu Feb 16 15:23:17 2006
From: http (Paul Rubin)
Date: 16 Feb 2006 12:23:17 -0800
Subject: Job advert: Your help needed
References: <mailman.1996.1140081219.27775.python-list@python.org>
	<kI4Jf.409265$qk4.57605@bgtnsc05-news.ops.worldnet.att.net>
Message-ID: <7xvevf6oju.fsf@ruckus.brouhaha.com>

"Andrew Koenig" <ark at acm.org> writes:
> > Paul Boots
> > bootsch at acm.org
> > +354 664 1748
> 
> Iceland?  really??

Gonna go try to get a chess match?  ;-)

Mike Jittlov likes the place too.  I thought of him immediately but
AFAIK he doesn't use Python.


From kbk at shore.net  Wed Feb 15 23:00:22 2006
From: kbk at shore.net (Kurt B. Kaiser)
Date: Wed, 15 Feb 2006 23:00:22 -0500 (EST)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200602160400.k1G40MGE014091@bayview.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  399 open ( +8) /  3042 closed ( +4) /  3441 total (+12)
Bugs    :  923 open ( +8) /  5553 closed (+13) /  6476 total (+21)
RFE     :  209 open ( +0) /   198 closed ( +1) /   407 total ( +1)

New / Reopened Patches
______________________

urllib proxy_bypass broken  (2006-02-07)
       http://python.org/sf/1426648  opened by  Anthony Tuininga

Implementation of PEP 357  (2006-02-09)
CLOSED http://python.org/sf/1428778  opened by  Travis Oliphant

pdb: fix for  1326406 (import  __main__ pdb failure)  (2006-02-10)
       http://python.org/sf/1429539  opened by  Ilya Sandler

Implement PEP 357 for real  (2006-02-11)
       http://python.org/sf/1429591  opened by  Travis Oliphant

PEP 338 implementation  (2006-02-11)
       http://python.org/sf/1429601  opened by  Nick Coghlan

PEP 338 documentation  (2006-02-11)
       http://python.org/sf/1429605  opened by  Nick Coghlan

Link Python modules to libpython on linux if --enable-shared  (2006-02-11)
       http://python.org/sf/1429775  opened by  Gustavo J. A. M. Carneiro

trace.py needs to know about doctests  (2006-02-11)
       http://python.org/sf/1429818  opened by  Marius Gedminas

Missing HCI sockets in bluetooth code from socketmodule  (2006-02-15)
       http://python.org/sf/1432399  opened by  Philippe Biondi

Patches Closed
______________

Implementation of PEP 357  (2006-02-10)
       http://python.org/sf/1428778  closed by  ncoghlan

Prefer linking against ncursesw over ncurses library  (2006-02-09)
       http://python.org/sf/1428494  closed by  loewis

Enhancing '-m' to support packages (PEP 338)  (2004-10-09)
       http://python.org/sf/1043356  closed by  ncoghlan

File-iteration and read* method protection  (2006-01-05)
       http://python.org/sf/1397960  closed by  twouters

New / Reopened Bugs
___________________

tarfile.open bug / corrupt data  (2006-02-08)
       http://python.org/sf/1427552  opened by  Chris86

List not initialized if used as default argument  (2006-02-08)
CLOSED http://python.org/sf/1427789  opened by  Jason

Crash on invalid coding pragma  (2006-02-09)
CLOSED http://python.org/sf/1428264  opened by  ocean-city

add /usr/local support  (2006-02-09)
CLOSED http://python.org/sf/1428789  opened by  Karol Pietrzak

set documentation deficiencies  (2006-02-10)
CLOSED http://python.org/sf/1429063  opened by  Keith Briggs

For loop exit early  (2006-02-10)
       http://python.org/sf/1429481  opened by  msmith

segfault in FreeBSD  (2006-02-11)
CLOSED http://python.org/sf/1429585  opened by  aix-d

urllib.py: AttributeError on BadStatusLine  (2006-02-11)
       http://python.org/sf/1429783  opened by  Robert Kiendl

smtplib: empty mail addresses  (2006-02-12)
       http://python.org/sf/1430298  opened by  Freek Dijkstra

urlib2  (2006-02-13)
       http://python.org/sf/1430435  opened by  halfik

recursive __getattr__ in thread crashes OS X  (2006-02-12)
       http://python.org/sf/1430436  opened by  Aaron Swartz

CSV Sniffer fails to report mismatch of column counts  (2006-02-13)
       http://python.org/sf/1431091  opened by  Vinko

Logging hangs thread after detaching a StreamHandler's termi  (2006-02-13)
       http://python.org/sf/1431253  opened by  Yang Zhang

long path support in win32 part of os.listdir(posixmodule.c)  (2006-02-14)
       http://python.org/sf/1431582  opened by  Sergey Dorofeev

pydoc still doesn't handle lambda well  (2006-02-15)
       http://python.org/sf/1432260  opened by  William McVey

Descript of file-object read() method is wrong.  (2006-02-15)
       http://python.org/sf/1432343  opened by  Grant Edwards

arrayobject should use PyObject_VAR_HEAD  (2006-02-15)
       http://python.org/sf/1432350  opened by  Jim Jewett

Bugs Closed
___________

Random stack corruption from socketmodule.c   (2004-01-13)
       http://python.org/sf/876637  closed by  nnorwitz

patch for etree cdata and attr quoting  (2006-02-04)
       http://python.org/sf/1424171  closed by  effbot

List not initialized if used as default argument  (2006-02-08)
       http://python.org/sf/1427789  closed by  birkenfeld

msvccompiler.py modified to work with .NET 2005 on win64  (2006-02-06)
       http://python.org/sf/1425482  closed by  loewis

email.Message should supress warning from uu.decode  (2006-01-18)
       http://python.org/sf/1409403  closed by  bwarsaw

Crash on invalid coding pragma  (2006-02-09)
       http://python.org/sf/1428264  closed by  birkenfeld

add /usr/local support  (2006-02-10)
       http://python.org/sf/1428789  closed by  loewis

set documentation deficiencies  (2006-02-10)
       http://python.org/sf/1429063  closed by  birkenfeld

segfault in FreeBSD  (2006-02-11)
       http://python.org/sf/1429585  closed by  nnorwitz

typo in tutorial  (2006-02-12)
       http://python.org/sf/1430076  closed by  effbot

New / Reopened RFE
__________________

itertools.any and itertools.all  (2006-02-15)
CLOSED http://python.org/sf/1432437  opened by  paul cannon

RFE Closed
__________

itertools.any and itertools.all  (2006-02-15)
       http://python.org/sf/1432437  closed by  birkenfeld



From uymqlp502 at sneakemail.com  Tue Feb 21 15:54:13 2006
From: uymqlp502 at sneakemail.com (Russ)
Date: 21 Feb 2006 12:54:13 -0800
Subject: deriving from float or int
In-Reply-To: <slrndvlfts.9se.sybrenUSE@schuimige.unrealtower.org>
References: <1140502954.660120.174160@g14g2000cwa.googlegroups.com>
	<slrndvlfts.9se.sybrenUSE@schuimige.unrealtower.org>
Message-ID: <1140555253.262485.214100@z14g2000cwz.googlegroups.com>

The problem is that when I derive a new class from float, the darn
thing won't let me create a constructor that accepts more than one
argument. I need two arguments: one for the numerical value and one for
the units. But when I try to give the constructor two arguments, I get
this when I call the constructor:

TypeError: float() takes at most 1 argument (2 given)

In other words, python doesn't seem to want to let me "extend" the
float type. I don't understand the reason for that, but I assume there
is a reason.



From fuzzyman at gmail.com  Sun Feb 26 14:32:20 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 26 Feb 2006 11:32:20 -0800
Subject: An isalpha() that accepts underscores as well
In-Reply-To: <87bqwtor98.fsf@yandex.ru>
References: <1140875695.053987.158710@t39g2000cwt.googlegroups.com>
	<cone.1140889811.930498.40672.5001@35st-server.simplicato.com>
	<mailman.2449.1140979860.27775.python-list@python.org>
	<87bqwtor98.fsf@yandex.ru>
Message-ID: <1140982340.006483.245000@e56g2000cwe.googlegroups.com>


Zajcev Evgeny wrote:
> egbert <egbert.bouwman at hccnet.nl> writes:
>
> > The string method isalpha() returns True when all characters in the
> > string are alphabetic. Unfortunately the underscore is not alphabetic.
> > A function that does what I need is:
> >
> > def alfa_(w):
> >     return "".join(w.split("_")).isalpha()
> >
> > but for the kind of strings that I have this is about ten times
> > slower than isalpha() sec. Any suggestions ?
> > Thanks.
>
> what about
>
>     def alfa_(w):
>         return w.isalpha() or w.find('_') != -1
>

That returns True if 'w' contains an underscore. The spec is to return
True if 'w' contains *only* alphaebtical characters and '_'.

alfa('%^_*&')

would return True here.

> ? but yes it does scan `w' twice ..
>
> You could also do something like:
>
>     def alfa_(w):
>         for c in w:
>             if not c.isalpha() and not c == '_':
>                return False
>         return True
>

Part of the problem is that the string method 'isalpha' is implemented
in C, and so will be  quicker than any pure Python alternative.

The following will work, and probably only be twice as slow as
'isalpha'  :-) :

def alfa(w):
   return w.replace('_', '').isalpha()

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml

> -- 
> lg



From ntv1534 at gmail.com  Mon Feb 13 12:12:47 2006
From: ntv1534 at gmail.com (MooMaster)
Date: 13 Feb 2006 09:12:47 -0800
Subject: cx_Oracle string problems...
Message-ID: <1139850767.853237.122710@f14g2000cwb.googlegroups.com>

After some google searching on the forum I couldn't find any topics
that seemed to relate exactly to my problem, so hopefully someone can
help me out...

I'm running python 2.4.1 on a local Win2K system and doing some
work-related development on an AIX box, and I'm running into a problem
using cx_Oracle to add some information to an Oracle 9.2 table.

I have a table_title defined as a VARCHAR2 data type, and when I'm
trying to retrieve the data from a GUI I do so like this:

tableTitle = self.window.TitleCB.GetValue()

After retrieving several pieces of information, including mostly
integers, like this from my display I create a string that represents a
valid SQL statement and then use cx_Oracle 4.1 to connect to the Oracle
db on the server and write the data to the table, like so:

###########snipet#########################
sql = str('INSERT INTO prime.utwsLOT VALUES (' + str(self.kID) + ',' +
string)
curse = self.connection.cursor()
curse.execute(sql)
###########/snipet#########################

which generates the following string in Windows
INSERT INTO prime.utwsLOT VALUES (0,400,  'goo ', 0,  3,   2,  1)

This sucessfully connects to the db and writes the data from my Windows
box to the AIX box. One of the requirements of the application I'm
writing, however, is that it be installed and run from the AIX box
itself. When I try to run my code on the AIX box, however, THIS string
is generated, and the following happens:

INSERT INTO prime.utwsLOTVALUES(0, 400, "goo", 0, 3, 2, 1)
Traceback (most recent call last):
  File "treedisp.py", line 147, in Export
    MyExport.LineExporter()
  File "/users/z04857/nickUT/OracleExporter.py", line 118, in
LineExporter
    self.prepareSQL(toExport, "lines")
  File "/users/z04857/nickUT/OracleExporter.py", line 249, in
prepareSQL
    self.doExport(sql)
  File "/users/z04857/nickUT/OracleExporter.py", line 261, in doExport
    curse.execute(string)
cx_Oracle.DatabaseError: ORA-00984: column not allowed here

In the words of Metal Gear Solid:2: FISSION MAILED...

Notice the double quotes in the above sql string. I thought this might
be a problem, so I ran my SQLPlus client with the same string and got
the same error. The double quotes is definitely a no go! Being an
enterprising programmer, I figured I would just hardcode the single
quotes into the string to fix the problem, so I did the following:

tableTitle =str("'" + self.window.TitleCB.GetValue() +"'")

...and got the following string was created on the AIX box (as
displayed by a print statement I put in the code):
INSERT INTO prime.utwsLOTVALUES(0, 400, "goo", 0, 3, 2, 1)

uh-oh...Thinking that perhaps an escape sequence would solve the
problem, I made the following modification:
tableTitle =str("\'" + self.window.TitleCB.GetValue() +"\'")

and receieved the following string:
INSERT INTO prime.utwsLOTVALUES(0, 400, "goo", 0, 3, 2, 1)

This is when I heard Claire Redfield's quote from Resident Evil 2, "You
LOSE, big boy!", ring loudly in my ears... No matter what I do, I can't
seem to get the string to be set in single quotes on the AIX box.
*Something* keeps converting the string to double quotes, which in turn
causes the cx_Oracle database write to fail. I have no clue what could
be doing this...Has anyone else ever encountered a similar problem? Can
anyone think of something else I can try?

Sorry for the length, but thanks for the help!



From pydecker at gmail.com  Tue Feb 14 17:11:41 2006
From: pydecker at gmail.com (Peter Decker)
Date: Tue, 14 Feb 2006 17:11:41 -0500
Subject: How can I find a freelance programmer?
In-Reply-To: <op.s4y9v9olix6gqv@charles>
References: <op.s4y9v9olix6gqv@charles>
Message-ID: <ca55a9900602141411y67d633ccncecfab1271e06f00@mail.gmail.com>

On 2/14/06, Charles <me at privacy.net> wrote:

> I am looking for a freelance Python programmer to create a cross-platform
> application with wxPython.
> Any idea where I could find one?

You should check out the Dabo project, which is a very impressive
framework that uses wxPython for its UI. The authors are both
independent programmers, and they sure know their stuff.

--

# p.d.


From grblanco at gmail.com  Thu Feb  9 17:34:28 2006
From: grblanco at gmail.com (JerryB)
Date: 9 Feb 2006 14:34:28 -0800
Subject: re.match versus re.findall
Message-ID: <1139524468.861442.146240@g44g2000cwa.googlegroups.com>

Hi,
I have a string like this:

invalidStr = "192.168.*.1"

I want to be sure I don't get a * followed by a number, i.e. I want
invalidStr to be invalid. So I do:

numberAfterStar = re.compile(r'\*.*\d')

Now, here's the fun:

If I run:
if numberAfterStar.findall(invalidStr):
    print "Found it with findall!"

it prints, if I run:

if numberAfterStar.match(invalidStr):
    print "Found it with match!"

it doesn't.
Why does findall finds a match it but match doesn't?

Thanks!
Jerry



From kyle at kbrooks.ath.cx  Wed Feb  8 17:05:06 2006
From: kyle at kbrooks.ath.cx (Kyle Brooks)
Date: Wed, 08 Feb 2006 17:05:06 -0500
Subject: Circe released to public domain!
Message-ID: <dsdpul$ect$1@sea.gmane.org>

Wednesday, February 8th, 2006.

Dear all,

I hereby release Circe to the public domain.

Our repo is at http://kbrooks.ath.cx/repos/circe.



From keith at nekotaku.com  Sat Feb 11 19:32:44 2006
From: keith at nekotaku.com (keith at nekotaku.com)
Date: Sat, 11 Feb 2006 17:32:44 -0700
Subject: Issues installing MySQL-python-0.3.5 
Message-ID: <20060211173244.805655b7c67e576280eebc9eec5e7522.bbd719d2af.wbe@email.secureserver.net>

Hi,

I am trying to use the Python MySQL APIs and have been attempting to
install the above software.

I am using MySQL 5.0.18-standard with Python 2.4.1

I get errors on the build. Some searching showed that one of the modules
I was having issues with now has less arguments in my version of python,
but I can't seem to fix the following error:

***
_mysqlmodule.c: In function ?_mysql_ConnectionObject_shutdown?:
_mysqlmodule.c:1019: error: too few arguments to function
?mysql_shutdown?
***
Should I just give up on MySQL-python-0.3.5 ?

Is there a more up to date API I should install for using with my
current versions of Python and MySQL?

Any help appreciated!
Keith



From kyle at kbrooks.ath.cx  Sun Feb  5 14:25:51 2006
From: kyle at kbrooks.ath.cx (Kyle Brooks)
Date: Sun, 05 Feb 2006 14:25:51 -0500
Subject: Stopping Circe development
Message-ID: <ds5jfv$5j7$2@sea.gmane.org>

Hey all.

I have decided to stop Circe development because of school. If anyone 
wants to take over Circe development, please reply to this post.

Our repository (a Darcs repo) is at http://kbrooks.ath.cx/repos/circe.



From mooquack at suad.org  Wed Feb  1 23:18:57 2006
From: mooquack at suad.org (Kirk McDonald)
Date: Wed, 01 Feb 2006 20:18:57 -0800
Subject: nDimensional sparse histogram in python.
In-Reply-To: <1138853373.087911.167410@g14g2000cwa.googlegroups.com>
References: <1138848672.791908.90050@g44g2000cwa.googlegroups.com>
	<1ha3gff.u4comocxo4ddN%aleaxit@yahoo.com>
	<1138849589.663600.301610@z14g2000cwz.googlegroups.com>
	<1ha3hrb.z9fahb1cxs03zN%aleaxit@yahoo.com>
	<1138852458.567178.116980@g43g2000cwa.googlegroups.com>
	<1138852979.060845.249440@g44g2000cwa.googlegroups.com>
	<1138853373.087911.167410@g14g2000cwa.googlegroups.com>
Message-ID: <43e18734$1@nntp0.pdx.net>

KraftDiner wrote:
> Many thanks everyone.
> 
> One last quick question...
> The dictionary, I believe, is sorted by the key.
> Is there a way to sort it by the value?
> Say I wanted to put out a list of the frequency sorted by highest to
> lowest?
> 

The dictionary itself is actually unordered; a C++ std::map this ain't. 
To sort its elements, you need to build a list of the items and sort 
that, e.g.:

items = [(v, k) for k, v in self.histo.items()]
items.sort()

This will give you a list of (value, key) tuples sorted by value.

-Kirk McDonald


From felipe.lessa at gmail.com  Wed Feb 15 05:18:07 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Wed, 15 Feb 2006 08:18:07 -0200
Subject: Which is faster? (if not b in m) or (if m.count(b) > 0)
In-Reply-To: <1139976842.179801.285400@z14g2000cwz.googlegroups.com>
References: <1139976842.179801.285400@z14g2000cwz.googlegroups.com>
Message-ID: <1139998687.22163.27.camel@kenshin>

Em Ter, 2006-02-14 ?s 20:14 -0800, Farel escreveu:
> Which is Faster in Python and Why?
> 
> jc = {}; m = []
> x = [ [1,2,3,4,5,6,7,8,9],[..],.......] # upwards of 10000 entries
> def binm()
>     for item in x:
>         b = item[:]; b.sort(); bc = 0
>         for bitem in b: bc += int(bitem)
>         try: m = jc[bc]
>         except: m = []
>         if not b in m:
>             m.append(b); jc[bc]=m

Why do you copy the list and sort it if you're just summing its
elements? Instead of

        b = item[:]; b.sort(); bc = 0
        for bitem in b: bc += int(bitem)

you can do just

	bc = sum(int(i) for i in item)

or, if the order *really* matters, what is very strange, you can do

	bc = sum(int(i) for i in sorted(item))

Another thing, if you want to have in the values of the dictionary jc
only unique elements, you can use sets:

>>> a = set()
>>> print a
set([])
>>> a.add(10)
>>> print a
set([10])
>>> a.add(10)
>>> print a
set([10])
>>> a.add(10)
>>> print a
set([10])

So, the final example would be (assuming that you don't need to sum in
order):

def binm():
    for item in x:
        bc = sum(int(i) for i in item)
	try:
            jc[bc].add(b)
        except KeyError:
            jc[bc] = set([b])

Looks prettier, have less statements and is (or should be) faster. This
only works in Python 2.4, but you can adapt it to run on other versions,
too.

Cheers,
Felipe.

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From cjbackhouse at gmail.com  Wed Feb 22 21:37:37 2006
From: cjbackhouse at gmail.com (cjbackhouse at gmail.com)
Date: 22 Feb 2006 18:37:37 -0800
Subject: Tix, spinboxes, and 1>=5
Message-ID: <1140662257.514090.170510@g47g2000cwa.googlegroups.com>

This odd bug has been annoying me for several days now. I finally got
round to making this, frankly hilarious, testcase:


from Tix import *

def sayfive(num):
    if num<5: print num,"< 5"
    else: print num,">= 5"

sayfive(4)
sayfive(6)
rootwnd=Tk()
Control(rootwnd,command=sayfive).pack()
rootwnd.mainloop()


So, our program starts, the first two lines executed write "4<6" "6>=5"
as expected. Now the user changes the value in the spinner, and we get
output like "1>=5". What magic is Tix pulling, and more importantly how
the hell do I stop it?



From martin at v.loewis.de  Thu Feb  9 11:49:27 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 09 Feb 2006 17:49:27 +0100
Subject: sys.path and unicode folder names
In-Reply-To: <43eaf704@news.bezeqint.net>
References: <43e8c2ae$1@news.bezeqint.net>
	<43e8f3eb$0$7988$9b622d9e@news.freenet.de>
	<43e99e5e@news.bezeqint.net> <43EA3F20.2020402@v.loewis.de>
	<43ea541e@news.bezeqint.net> <43EA61B8.9040905@v.loewis.de>
	<43eaf704@news.bezeqint.net>
Message-ID: <43eb7297$0$21712$9b622d9e@news.freenet.de>

Nir Aides wrote:
> If few people use file names not in their respective CP_ACP as you say,
> why did Microsoft bother to make Windows XP a unicode OS?

Because it simplifies their implementation, in the long run.

> It is because of this situation that people in non-English speaking
> countries prefer to install English Windows XP. After all why should
> they get all messed up with incompatible software?

I see. Why do these people then refuse to change the code page of
their system (which *is* possible, even in English XP)?

> Python is Broken.

I agree. Please contribute a patch.

Regards,
Martin


From twic at urchin.earth.li  Fri Feb  3 11:13:01 2006
From: twic at urchin.earth.li (Tom Anderson)
Date: Fri, 3 Feb 2006 16:13:01 +0000
Subject: learning python, using string help
In-Reply-To: <1138932137.022318.164090@z14g2000cwz.googlegroups.com>
References: <1138906062.727850.177960@g14g2000cwa.googlegroups.com>  
	<fwsEf.24314$1%5.18129@tornado.texas.rr.com>
	<1138909296.301962.16230@z14g2000cwz.googlegroups.com>
	<Pine.LNX.4.62.0602022221500.8737@urchin.earth.li>  
	<1138925622.456566.133860@g47g2000cwa.googlegroups.com>  
	<1138931241.386430.234550@f14g2000cwb.googlegroups.com>
	<1138932137.022318.164090@z14g2000cwz.googlegroups.com>
Message-ID: <Pine.LNX.4.62.0602031610140.26207@urchin.earth.li>

On Fri, 2 Feb 2006, mikeisgreat at gmail.com wrote:

> silly newbie mistake
>
> your code runs fine on my openbsd box. ( I didnt uncomment the return
> map(...) line

My apologies - i should have made it clearer in the comment that it was 
hardwired to return example data!

> thanks for the awesome example!

I'm not sure how awesome it is - it's pretty simple, and probably has lots 
of bugs. Is the BSD ruptime output format the same as on HP-UX? I have a 
Mac myself, but no local machines broadcasting rwho data, so i don't get 
any output to play with when i run ruptime!

tom

-- 
hip  whizzo  teddy bear  egghead  realpolitik  tiddly-om-pom-pom
sacred cow  gene  blues  celeb  cheerio  civvy street  U-boat  tailspin
ceasefire  ad-lib  demob  pop  wizard  hem-line  lumpenproletariat  avant
garde  kitsch  sudden death  Big Apple  sex  drive-in  Mickey Mouse  bagel
dumb down  pesticide  racism  spliff  dunk  cheeseburger  Blitzkrieg
Molotov cocktail  snafu  buzz  pissed off  DNA  mobile phone  megabucks
Wonderbra  cool  Big Brother  brainwashing  fast food  Generation X
hippy  non-U  boogie  sexy  psychedelic  beatnik  cruise missile  cyborg
awesome  bossa nova  peacenik  byte  miniskirt  acid  love-in  It-girl
microchip  hypermarket  green  Watergate  F-word  punk  detox  Trekkie
naff all  trainers  karaoke  power dressing  toy-boy  hip-hop  beatbox
double-click  OK yah  mobile  virtual reality  gangsta  latte  applet
hot-desking  URL  have it large  Botox  kitten heels  ghetto fabulous
dot-commer  text message  google  bling bling  9/11  axis of evil  sex
up  chav


From cfbolz at gmx.de  Sun Feb  5 16:31:56 2006
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Sun, 05 Feb 2006 22:31:56 +0100
Subject: Most prominent Tkinter applications?
In-Reply-To: <a24fa$43e64a39$4275d90a$26634@FUSE.NET>
References: <a24fa$43e64a39$4275d90a$26634@FUSE.NET>
Message-ID: <ds5qsf$tqs$1@sea.gmane.org>

Kevin Walzer wrote:
> I'm looking for examples of "best practices" in Tkinter/Python
> programming. What are the most prominent Python applications out there
> that use Tkinter as the GUI toolkit? These can be commercial or
> open-source, but are preferably multi-platform.
> 
> I know IDLE is written in Tkinter, so that's one example. Can anyone
> direct me to others?
> 

No idea whether it should be counted as "most prominent" (whatever that 
means), but Skencil is a really impressive vector drawing program:

http://www.nongnu.org/skencil/

At least until a while ago it was using Tkinter, the website talks about 
a port to GTK, though.

Cheers,

Carl Friedrich Bolz



From fredrik at pythonware.com  Tue Feb 14 03:00:15 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 14 Feb 2006 09:00:15 +0100
Subject: Splitting a string
References: <43F18BA1.8010304@gmail.com>
Message-ID: <dss2mg$opm$1@sea.gmane.org>

Nico Grubert wrote:

> I'd like to split a string where 'and', 'or', 'and not' occurs.
>
> Example string:
> s = 'Smith, R. OR White OR Blue, T. AND Black AND Red AND NOT Green'
>
> I need to split s in order to get this list:
> ['Smith, R.', 'White', 'Blue, T.', 'Back', 'Red', 'Green']
>
> Any idea, how I can split a string where 'and', 'or', 'and not' occurs?

try re.split:

>>> s = 'Smith, R. OR White OR Blue, T. AND Black AND Red AND NOT Green'

>>> import re
>>> re.split("AND NOT|AND|OR", s) # look for longest first!
['Smith, R. ', ' White ', ' Blue, T. ', ' Black ', ' Red ', ' Green']

to get rid of the whitespace, you can either use strip

>>> [w.strip() for w in re.split("AND NOT|AND|OR", s)]
['Smith, R.', 'White', 'Blue, T.', 'Black', 'Red', 'Green']

or tweak the split pattern somewhat:

>>> re.split("\s*(?:AND NOT|AND|OR)\s*", s)
['Smith, R.', 'White', 'Blue, T.', 'Black', 'Red', 'Green']

to make the split case insensitive (so it matches "AND" as well as "and"
and "AnD" and any other combination), prepend (?i) to the pattern:

>>> re.split("(?i)\s*(?:and not|and|or)\s*", s)
['Smith, R.', 'White', 'Blue, T.', 'Black', 'Red', 'Green']

to keep the separators, change (?:...) to (...):

>>> re.split("(?i)\s*(and not|and|or)\s*", s)
['Smith, R.', 'OR', 'White', 'OR', 'Blue, T.', 'AND', 'Black', 'AND', 'Red',
'AND NOT', 'Green']

hope this helps!

</F>





From steve at holdenweb.com  Mon Feb  6 08:35:10 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 06 Feb 2006 13:35:10 +0000
Subject: Question about idioms for clearing a list
In-Reply-To: <1139231464.914400.37100@g44g2000cwa.googlegroups.com>
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
Message-ID: <ds7jac$j8$1@sea.gmane.org>

Will McGugan wrote:
> Steven Watanabe wrote:
> 
>>I know that the standard idioms for clearing a list are:
>>
>>  (1) mylist[:] = []
>>  (2) del mylist[:]
>>
>>I guess I'm not in the "slicing frame of mind", as someone put it, but
>>can someone explain what the difference is between these and:
>>
>>  (3) mylist = []
>>
>>Why are (1) and (2) preferred? I think the first two are changing the
>>list in-place, but why is that better? Isn't the end result the same?
> 
> 
> I'm wondering why there is no 'clear' for lists. It feels like a common
> operation for mutable containers. :-/
> 
Because it's just as easy to create and assign a new empty list (and 
have the old unused one garbage collected).

l = []

is all you need!

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From john at totalrekall.co.uk  Mon Feb  6 04:09:41 2006
From: john at totalrekall.co.uk (John Dean)
Date: Mon, 6 Feb 2006 09:09:41 GMT
Subject: Python V2.4.2 source code
Message-ID: <43e710de$0$23286$db0fefd9@news.zen.co.uk>

Hi

Does anybody know from where I can get a copy of the source for Python
V2.4.2. I downloaded what is reckoned to be the source code from
www.python.org, but is turns out to be the MacXOS version with the core
modules missing. The reason I am looking for the source code is so I can
make a debug build

-- 
Best Regards
John


From anon at nospam.nospam  Sun Feb  5 23:48:26 2006
From: anon at nospam.nospam (anon)
Date: Sun, 5 Feb 2006 23:48:26 -0500
Subject: Importing a class, please help...
References: <a1pFf.138$CO7.124@fe02.lga>
	<ds588l$aii$1@aphrodite.grec.isp.9tel.net>
Message-ID: <ByAFf.226$LI6.46@fe06.lga>

Xavier

Yes I meant Python.  I have also been using Jython and I am VERY WELL aware 
what a JAR is.  Jython has the ability to call methods stored in classes in 
a JAR.  I was only asking if this could be done with Python also.

You ask "why the hell would a Python script be able to read a JAR..".  Well, 
I was simply asking a newbie question.  The only way to gather knowladge is 
by asking questions.

You know, an old college proffesor I had was very knowladgeable and wise. 
He always took the time to answer questions, no matter how 'stupid' they 
would sound.  One can make a bigger impression on folks by stepping down a 
couple of steps and give a polite answer.  I mean no disrespect, just a 
suggestion when you post answers to folks like me who are just getting 
started with a new language...

regards


"Xavier Morel" <xavier.morel at masklinn.net> wrote in message 
news:ds588l$aii$1 at aphrodite.grec.isp.9tel.net...
> anon wrote:
>> Would somebody please drop me a hint, please?
>>
> Yeah, the definition of "JAR" is Java ARchive, why the hell would a Python 
> script be able to read a JAR in the first place (truth is it is, a JAR 
> file is nothing but a renamed ZIP, therefore the zipfile module allows you 
> to read it's content) and -- more importantly -- import Java classes.
>
> Notice the difference between *Python* script and *Java* class? That's 
> because they're two different languages.
> If you want to use Java classes and modules in a Pythonic context, you 
> want Jython (http://www.jython.org/) not Python (http://www.python.org/) 




From tjreedy at udel.edu  Sun Feb 19 00:54:22 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 19 Feb 2006 00:54:22 -0500
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
Message-ID: <dt916e$5e0$1@sea.gmane.org>


<63q2o4i02 at sneakemail.com> wrote in message 
news:1140324074.458446.227480 at z14g2000cwz.googlegroups.com...
> In learning Python I've read more about Lisp than when I was actually
> trying to learn it, and it seems that the two languages have lots of
> similarities:
>
> http://www.norvig.com/python-lisp.html
>
> I'm wondering if someone can explain to me please what it is about
> Python that is so different from Lisp that it can't be compiled into
> something as fast as compiled Lisp?  From this above website and
> others, I've learned that compiled Lisp can be nearly as fast as C/C++,

In order to be that fast, some of the dynamism of intepreted Lisp must be 
given up.  In particular object code is not list data.  Python with 
type-dynamism eliminated can also be translated to decent C/C++ and then 
compiled.  See PyRex and Weave.  There is also Psyco, which I believe 
translates directly to machine code.

> so I don't understand why Python can't also eventually be as efficient?
> Is there some *specific* basic reason it's tough?  Or is it that this
> type of problem in general is tough, and Lisp has 40+ years vs Python's
> ~15 years?

Yes, *much* more work has gone into Lisp than Python.  (At least 10x, I am 
sure. and maybe up to 100x)  During the 1980s, there was a Lisp/AI 
boom/bust something like the dot.com boom/bust of the last 1990s with 
perhaps a billion invested in Lisp/AI companies.  I presume some of that 
went into Lisp itself (as opposed to AI applications thereof).

Terry Jan Reedy





From markscala at gmail.com  Wed Feb 22 23:13:08 2006
From: markscala at gmail.com (markscala at gmail.com)
Date: 22 Feb 2006 20:13:08 -0800
Subject: "Temporary" Variable
In-Reply-To: <1140665472.203495.7570@g44g2000cwa.googlegroups.com>
References: <1140665472.203495.7570@g44g2000cwa.googlegroups.com>
Message-ID: <1140667988.182117.320990@u72g2000cwu.googlegroups.com>

I tried this code and it worked fine:

while 1:
    var1 = raw_input("Enter a number: ")
    print "You entered:",var1
    var1 = int(var1) + 1
    print var1



From fidlee at gmail.com  Thu Feb 23 12:58:01 2006
From: fidlee at gmail.com (fidlee)
Date: 23 Feb 2006 09:58:01 -0800
Subject: need help regarding compilation
In-Reply-To: <46694pF9ms9bU1@uni-berlin.de>
References: <1140714583.014871.194640@p10g2000cwp.googlegroups.com>
	<46694pF9ms9bU1@uni-berlin.de>
Message-ID: <1140717481.804798.195070@z14g2000cwz.googlegroups.com>

>
> Try this:
>
> def fac(x):
>  if x<=1:return 1
>  return x*fac(x-1)

I am still getting an error in compilation. Would be really thankful if
someone could tell me as to what is going wrong.

processing factor

Required packages:

Creating adapters:

Creating .java files:
  factor module

Compiling .java to .class...
Compiling with args: ['C:\\Program Files\\Java\\jre1.6.0\\bin\\javac',
'-classpa
th', 'C:\\Program Files\\jython123\\jython.jar;;.\\jpywork;;C:\\Program
Files\\j
ython123\\Tools\\jythonc;C:\\PROGRA~1\\JYTHON~1\\src\\.;C:\\Program
Files\\jytho
n123\\Lib;C:\\Program Files\\jython123', '.\\jpywork\\factor.java']
1  java.io.IOException: CreateProcess: "C:\Program
Files\Java\jre1.6.0\bin\javac
" -classpath "C:\Program
Files\jython123\jython.jar;;.\jpywork;;C:\Program Files
\jython123\Tools\jythonc;C:\PROGRA~1\JYTHON~1\src\.;C:\Program
Files\jython123\L
ib;C:\Program Files\jython123" .\jpywork\factor.java error=2

Consider using the -C/--compiler command line switch, or setting
the property python.jythonc.compiler in the registry.
ERROR DURING JAVA COMPILATION... EXITING



From phil at riverbankcomputing.co.uk  Thu Feb  2 17:06:55 2006
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Thu, 2 Feb 2006 22:06:55 +0000
Subject: PyQt: QListView how to retrieve selected items?
In-Reply-To: <drtt2d$uie$00$1@news.t-online.com>
References: <1138907537.417067.228570@z14g2000cwz.googlegroups.com>
	<drtt2d$uie$00$1@news.t-online.com>
Message-ID: <200602022206.55691.phil@riverbankcomputing.co.uk>

On Thursday 02 February 2006 9:25 pm, Fabian Steiner wrote:
> Hi!
>
> Sorry for adopting your post for my own question, but since it is
> related to PyQT I think it's ok: Does anybody of you know where the
> openbook ?GUI Programming with Python: QT Edition? has gone? It's not
> available any more: http://www.opendocs.org/pyqt/ points now to a
> non-existing site.
>
> So far, I also couldn't find any other site to have a look at the online
> version.
>
> Any hints are welcome!

I've been told that this is temporary. The book will be back, but I don't know 
when.

Phil


From benji at benjiyork.com  Wed Feb  8 17:35:14 2006
From: benji at benjiyork.com (Benji York)
Date: Wed, 08 Feb 2006 17:35:14 -0500
Subject: What editor shall I use?
In-Reply-To: <1139436717.623712.159780@o13g2000cwo.googlegroups.com>
References: <1139410110.389122.215400@z14g2000cwz.googlegroups.com>	<dsd0s6$1sps$1@boco.fee.vutbr.cz>
	<1139436717.623712.159780@o13g2000cwo.googlegroups.com>
Message-ID: <43EA7222.7080200@benjiyork.com>

Dylan Moreland wrote:
> I myself have just begun using vim. Does anyone have any
> tips/convenient tweaks for python programming with it?

EnhancedCommentify, ShowFunc, spacehi, svncommand, and pythonhelper are 
nice Vim plugins to use with Python.  They can all be found on vim.org.

Not Python-specific, but I highly recommend Steve Oualline's Vim book 
(http://www.amazon.com/gp/product/0735710015).
--
Benji York


From lycka at carmen.se  Mon Feb 27 12:44:11 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Mon, 27 Feb 2006 18:44:11 +0100
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <dtt0qf$ete$1@newsreader3.netcologne.de>
References: <dtl9ad$35h$1@sea.gmane.org> <dtlat7$80c$1@sea.gmane.org>
	<mailman.2376.1140733288.27775.python-list@python.org>
	<dtljre$f8i$1@newsreader3.netcologne.de>
	<dtn5l2$nhr$1@newsreader3.netcologne.de>
	<dtqpkl$kbo$1@newsreader3.netcologne.de>
	<*firstname*nlsnews-46208F.13454626022006@news.verizon.net>
	<dtt0qf$ete$1@newsreader3.netcologne.de>
Message-ID: <dtvdpc$9r6$1@wake.carmen.se>

Claudio Grondi wrote:
> I mean, that using time.clock() solves the problem, because the output 
> of the following code:

On Windows that it. At least on Linux and Solaris, time.clock() returns
CPU time. If time.clock() returns significantly different values before
and after time.sleep(1), there's something seriously broken in sleep on
such platforms.

Anyway, what is the perceived problem?
A) That sleep takes too much time, or
B) that time measurements don't work right?

If A), the problem is solved if what really happens is clock-setting
glitches.

If B), I see two options:

- Use some proper external and stable time source. (It should be
   fairly trivial to build a little socket server that returns
   timestamps from a single source if no other source is available.
   See http://www.python.org/doc/lib/socket-example.html )

- If the clock-resetting is actually warranted because the system
   clocks lag so much, make sure this resetting is made more often,
   so that it never gets so much off track.

Unless hardware is broken, or the clocks are changed so that they
get more and more off track with time as the rest of us perceives
it, there ought to be "negative sleeps" as well as sleeps much
longer than 2 seconds. Of course, if you only look for longer sleeps
than 2 secs, you won't see them.

BTW, finding "negative sleeps" pretty much proves that it's the
clocks, not actual delays, that cause problems...

I guess a typical cause of clock setting problems is that one has
two disagreeing time sources that both try to set the system times
of the computers...



From erniedude at gmail.com  Fri Feb  3 17:06:10 2006
From: erniedude at gmail.com (Ernesto)
Date: 3 Feb 2006 14:06:10 -0800
Subject: Launch Windows command window....
In-Reply-To: <1139003975.837861.141680@o13g2000cwo.googlegroups.com>
References: <1139003975.837861.141680@o13g2000cwo.googlegroups.com>
Message-ID: <1139004370.221885.190540@f14g2000cwb.googlegroups.com>

I'm one step closer...

subprocess.Popen("telnet.exe -f C:\Folder\output.txt localhost 6000")

is improved, but still doesn't launch a SEPERATE window...



From apgwoz at gmail.com  Wed Feb  8 15:52:12 2006
From: apgwoz at gmail.com (Andrew Gwozdziewycz)
Date: Wed, 8 Feb 2006 15:52:12 -0500
Subject: Unable to get PIL to load jpeg images
In-Reply-To: <dsa4rh$s9d$1@sea.gmane.org>
References: <1139263113.552140.114100@o13g2000cwo.googlegroups.com>
	<1139315319.654694.285330@g43g2000cwa.googlegroups.com>
	<dsa4rh$s9d$1@sea.gmane.org>
Message-ID: <8ba244fb0602081252r14fa14abs6b6698a14db09826@mail.gmail.com>

On 2/7/06, Steve Holden <steve at holdenweb.com> wrote:
> peter.mosley at talk21.com wrote:
> > Someone out there must surely know - please!
> >
> > Peter
> >

Try building the PIL from scratch. It might give you some insight as
to which library it exactly is looking for. I can remember when
compiling the PIL on my mac having to create a symbolic link to
libjpeg.so.6 or something. It was bizarre but worked fine afterwards.

--
Andrew Gwozdziewycz <apgwoz at gmail.com>
http://ihadagreatview.org
http://plasticandroid.org


From claudio.grondi at freenet.de  Wed Feb 22 22:17:25 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Thu, 23 Feb 2006 04:17:25 +0100
Subject: bsddb3 database file, what are the __db.001,  __db.002,  __db.003
	files for?
Message-ID: <dtj9gc$b33$1@newsreader3.netcologne.de>


I have just started to play around with the bsddb3 module interfacing 
the Berkeley Database.

Beside the intended database file
   databaseFile.bdb
I see in same directory also the
   __db.001
   __db.002
   __db.003
files where
   __db.003 is ten times as larger as the databaseFile.bdb
and
   __db.001 has the same size as the databaseFile.bdb .

What are these files for and what could be the reason they occur?

If I delete them, the access to the database in databaseFile.bdb
still works as expected.

Any hints toward enlightenment?

Is there any _good_ documentation of the bsddb3 module around beside 
this provided with this module itself, where it is not necessary e.g. to 
guess, that C integer value of zero (0) is represented in Python by the 
value None returned in case of success by db.open() ?

Claudio


From steve at REMOVETHIScyber.com.au  Fri Feb 10 10:47:14 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sat, 11 Feb 2006 02:47:14 +1100
Subject: Too Many if Statements?
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<6e2iu1hdb8fvlfkcuulloiiq1khlbhret1@4ax.com>
	<1139517959.741090.28560@g14g2000cwa.googlegroups.com>
	<dshvb4$jfn$1@wake.carmen.se>
	<1139583025.428875.225500@g14g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.10.15.47.14.546628@REMOVETHIScyber.com.au>

On Fri, 10 Feb 2006 06:50:25 -0800, slogging_away wrote:

> Excellent suggestion, (behold the power of the command line!).  I ran
> two saved versions of the script that had produced the symptom
> originally described.  The fist seemed to be caused by too many 'if'
> statements, the second by adding another array, but both came up with
> the same system error at the command prompt level shown here:
> 
> SystemError: com_backpatch: offset too large

Is this a Python error or a shell error?

If it is a Python error, perhaps you would like to post the entire
traceback? 



-- 
Steven.



From btaranto at gmail.com  Tue Feb  7 11:46:23 2006
From: btaranto at gmail.com (btaranto at gmail.com)
Date: 7 Feb 2006 08:46:23 -0800
Subject: python-ldap
Message-ID: <1139330783.286572.271310@z14g2000cwz.googlegroups.com>

y0!
where can i get module of python-ldap to work with eclipse ide on
windows?

tks!



From robert.kern at gmail.com  Sun Feb 19 02:27:12 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sun, 19 Feb 2006 01:27:12 -0600
Subject: aborting without killing the python interpreter
In-Reply-To: <1140320926.993703.90380@o13g2000cwo.googlegroups.com>
References: <1140320926.993703.90380@o13g2000cwo.googlegroups.com>
Message-ID: <dt96kh$g0l$1@sea.gmane.org>

Russ wrote:
> I wrote a simple little function for exiting with an error message:
> 
> def error ( message ): print_stack(); exit ("\nERROR: " + message +
> "\n")
> 
> It works fine for executing as a script, but when I run it
> interactively in the python interpreter it kills the interpreter.
> That's not what I want. Is there a simple way to have a script
> terminate but not have it kill the python interpreter when I run it
> interactively? I suspect I may need to use exceptions, but I'm hoping
> not to need them. Thanks.

Exceptions do *exactly* what you want in a very clean and simple way. They are a
fundamental feature of Python. Do not fear them. They are your friends.

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From enterr at gmail.com  Mon Feb 20 01:27:16 2006
From: enterr at gmail.com (Atanas Banov)
Date: 19 Feb 2006 22:27:16 -0800
Subject: why does close() fail miserably on popen with exit code -1 ?!
Message-ID: <1140416836.030294.289800@f14g2000cwb.googlegroups.com>

i ran onto this weirdness today: seems like close() on popen-ed
(pseudo)file fails miserably with exception instead of returning exit
code, when said exit code is -1.

here is the simplest example (under Windows):

>>> print popen('exit 1').close()
1
>>> print popen('exit -1').close()
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
IOError: (0, 'Error')
>>> print popen('exit -2').close()
-2

has anyone have idea why is that?

- nas



From elpX at adsihqX.com  Thu Feb 23 19:39:05 2006
From: elpX at adsihqX.com (Dr. Pastor)
Date: Fri, 24 Feb 2006 00:39:05 GMT
Subject: PYTHONPATH?
Message-ID: <JAsLf.257$6I.183@newsread3.news.pas.earthlink.net>

Several Documents about Python
refer to PYTHONPATH.
I could not find such variable.
(Python 2.4.2, IDLE 1.1.2, Windows XP)
How should/could I nominate a Directory to be
the local Directory?
Thanks for any guidance.


From exogen at gmail.com  Sun Feb 19 00:14:17 2006
From: exogen at gmail.com (Brian Beck)
Date: Sun, 19 Feb 2006 00:14:17 -0500
Subject: strange error I can't figure out...
In-Reply-To: <nrSdnRNFGZDBvWrenZ2dnUVZ_v2dnZ2d@comcast.com>
References: <mailman.2093.1140267254.27775.python-list@python.org>
	<nrSdnRNFGZDBvWrenZ2dnUVZ_v2dnZ2d@comcast.com>
Message-ID: <dt8ur0$pg2$1@eeyore.INS.cwru.edu>

John Zenger wrote:
> Also, get rid of the comma at the end of that last print statement.

This would break the progress bar functionality I think, which is meant 
to update a single line.

-- 
Brian Beck
Adventurer of the First Order


From jstroud at ucla.edu  Fri Feb 10 00:08:50 2006
From: jstroud at ucla.edu (James Stroud)
Date: Thu, 09 Feb 2006 21:08:50 -0800
Subject: Simple Tkinter app works in Linux, not in Windows
In-Reply-To: <1139546543.928446.283090@o13g2000cwo.googlegroups.com>
References: <1139531183.792405.148600@o13g2000cwo.googlegroups.com>
	<dsgs5g$d4f$1@daisy.noc.ucla.edu>
	<1139546543.928446.283090@o13g2000cwo.googlegroups.com>
Message-ID: <dsh752$ld3$1@daisy.noc.ucla.edu>

john.orlando at gmail.com wrote:
>>I'm inclined to think that its your python installation. It worked for
>>me with both the cygwin python (both in the console and in an xterm) and
>>it also worked for me with idle using enthought python. I haven't tried
>>the active state python.
> 
> 
> Thanks for giving it a shot.  I just checked the version of Python I
> was using: 2.3.4 under Linux, and 2.4.2 under Windoze.  So there is a
> difference here I guess, though I'd be surprised if it were actually
> any kind of "fix" between the two versions.
> 
> As a side note, under Win, if I don't put the code in a class it seems
> to work fine. In other words:
> #start code
> from Tkinter import *
> win = Tk()
> img = PhotoImage(file="moon.gif")
> can = Canvas(win)
> can.create_image(2,2,image=img, anchor=NW)
> 
> #no requirement for keeping an instance of the image around here
> 
> win.mainloop()
> #end code
> 
> ...and I get a moon displayed in the top-level window.  This got me
> wondering if I was misusing the Frame and/or Canvas widget in some
> fashion (since obviously there is no Frame in the above snippet).
> 
> Any other thoughts out there?
> 
> TIA,
> John
>

There is a difference between the above code and your prior code, namely 
in that you have explicitly instantiated Tk and put your canvas into the 
"root" toplevel. Try this in idle where it was failing:


#start of code
from Tkinter import *

class DisplayPict(Frame):

     def __init__(self,parent=None):
         Frame.__init__(self,parent)
         self.pack()
         self.img=PhotoImage(file="moon.gif")
         self.can=Canvas(self)
         self.can.create_image(2,2,image=self.img,anchor=NW)
         self.can.pack(fill=BOTH)

         #keep a reference to the img around
         self.can.photo=self.img

if __name__ == '__main__':

   tk = Tk()
   DisplayPict(tk).mainloop()

#end of code

James


From EP at zomething.com  Thu Feb 23 01:00:02 2006
From: EP at zomething.com (EP)
Date: Wed, 22 Feb 2006 22:00:02 -0800
Subject: new wooden door step - fixing and finishing
In-Reply-To: <1140598234.454510.281820@g14g2000cwa.googlegroups.com>
References: <1140598234.454510.281820@g14g2000cwa.googlegroups.com>
Message-ID: <43FD4F62.7010204@zomething.com>

jkn wrote:

>Hi all
>    I'm considering having a go at replacing the wooden door step to
>our back door. The original is loose and rotting.
>
>I'm sure some of this will be clearer when I remove the (metal) door
>frame - how is such a step fixed? Vertical frame fixings?
>
>Also, any suggestions for treating/finishing such an item, subject to
>heavy use, to prevent future rot? I was wondering about treating it
>wilth liberal amounts of Teak Oil or similar...
>
>    Thanks
>    Jon N
>
>  
>
Jon,

Wood rots so no matter how you build it you are going to find yourself 
arm deep in the framing wiedling nails and wood shims in the future.  
The important thing is that you develop a proper level of documentation 
and incorporate it right into your new steps.  If the original builder 
had done this you would not now be asking these questions.

Good working documentation can be easily achieved by writing comments 
right onto the workings beneath the steps, however these comments need 
to be meaningful; an over abundance of obvious comments ("Nail goes 
here!") will actually make future rework harder.

If you have practiced proper documentation on your other projects, 
you'll do fine when you employ it here building your new steps.  Don't 
even think about teak oil until you have documented a well designed 
framework.  And remember, you're working in wood, you are going to need 
to tweak things here and there in the future

I might also recommend an object oriented approach, but I guess that's 
obvious.

Happy hammering!




From johnjsal at NOSPAMgmail.com  Thu Feb 16 15:54:44 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 16 Feb 2006 20:54:44 GMT
Subject: embedding python in HTML
In-Reply-To: <GD5Jf.1637$No6.38292@news.tufts.edu>
References: <GD5Jf.1637$No6.38292@news.tufts.edu>
Message-ID: <oE5Jf.1638$No6.38292@news.tufts.edu>

John Salerno wrote:
> I'm hoping someone can give me the basics for how to do very simple 
> things with Python scripts from within my HTML. For example, I know that 
> I can do this in PHP:
> 
> <h1>Here is a header</h1>
> <?php include("file.html"); ?>    // include some external html
> <p>More html</p>
> 
> So to do this with Python, do I simply integrate it into the HTML as 
> above, with no extra steps? Also, which symbols do I use to denote 
> Python language?
> 
> Thanks.

Also, do I need to give the html file an extension of .py?


From sandravandale at yahoo.com  Mon Feb 27 17:37:46 2006
From: sandravandale at yahoo.com (Sandra-24)
Date: 27 Feb 2006 14:37:46 -0800
Subject: ''.join() with encoded strings
In-Reply-To: <mailman.2483.1141063774.27775.python-list@python.org>
References: <1141061067.253803.267540@i39g2000cwa.googlegroups.com>
	<mailman.2483.1141063774.27775.python-list@python.org>
Message-ID: <1141079865.962082.235000@v46g2000cwv.googlegroups.com>

Sorry, this was my mistake, I had some unicode strings in the list
without realizing it. I deleted the topic within 10 minutes, but
apparently I wasn't fast enough. You're right join works the way it
should, I just wasn't aware I had the unicode strings in there.

-Sandra



From Sophia.Diana.Rozario at deshaw.com  Mon Feb 13 02:36:11 2006
From: Sophia.Diana.Rozario at deshaw.com (Rozario, Sophia_Diana)
Date: Mon, 13 Feb 2006 13:06:11 +0530
Subject: Wanted Python and C developer Urgently
Message-ID: <621DF660C7FCE844AE1578DC64D8CAEB5EA696@mshyd3.hyd.deshaw.com>

Hi, I am posting a couple of requirements in my organization. Any one interested can reply me directly.
Maestro Software Developer
We are seeking experienced software professionals to design and develop new components as well as to enhance and maintain Maestro, a best-of-breed computational chemistry graphical interface. Maestro is the unifying graphical interface for all of our simulation products. 
The ideal candidate will have at least 3 years of industry experience using C and C++, with a solid understanding of object-oriented design and programming. Experience in creating graphical user interfaces using Motif or a similar API and X Windows is required. You must have more than 3 years of industry experience with developing applications and significant development experience under UNIX (any version ok, but Linux or IRIX preferred). Frequent interactions with the firm's geographically dispersed groups make exceptional written and oral communication skills essential.
An interest in creating and working on scientific user-interfaces is a plus, as is experience with any of the following:
	*	Motif/Lesstif (or any similar variant). 
	*	OpenGL. 
	*	Development experience with any or all of Linux, IRIX, or Windows. 
	*	For Windows 2000 or XP, in particular, experience using MS VC++. 
	*	Familiarity with UNIX build tools such as make. 
	*	Fortran (77 and/or 90). 
Senior Python Developer
Our Maestro product, the unifying graphical interface for all of our simulation products, includes and is supported by a suite of Python productivity and workflow tools. These tools range from small independent applications to larger applications needing tight integration with one or more Schr?dinger products and utilities, and they allow for a high degree of customizability, increase user productivity and maximally leverage all Schr?dinger products by creating novel, highly effective workflows. 
We are currently seeking an experienced Python developer to design and develop additional Python tools, and to enhance and maintain the existing infrastructure. The ideal candidate will have a Bachelor's degree in Engineering or Science and will possess a sound knowledge of Python and C. Experience with maintaining or extending Python wrappers as well as some knowledge of Python internals are a must. Good written and oral communication skills are essential. 
Knowledge of Swig or C++ is a plus, as is experience with creating graphical user interfaces, especially using interpreted or scripted languages, though candidates with GUI experience using compiled languages will also be considered. 
Python Developer
Our Maestro product, the unifying graphical interface for all of our simulation products, includes and is supported by a suite of Python productivity and workflow tools. These tools range from small independent applications to larger applications needing tight integration with one or more Schr?dinger products and utilities, and they allow for a high degree of customizability, increase user productivity and maximally leverage all Schr?dinger products by creating novel, highly effective workflows. 
We are currently seeking an experienced software developer to design and develop additional Python tools, and to enhance and maintain the existing tools. The ideal candidate will have experience with and a solid understanding of Python or other scripted and interpreted languages. You must have a Master's degree in Physics or Chemistry with a good understanding of computational chemistry software and the associated workflows. You must have the ability to work well with scientists and developers within our Schr?dinger team to create the tools required by our customers and for our workflows. Frequent interactions with the firm's geographically dispersed groups make exceptional written and oral communication skills essential. 
Knowledge of Python, Tk, Tkinter, Pmw is a plus, as is experience in creating graphical user interfaces and cross-platform development.
Systems Software Engineer, Job Control
We are seeking software developers with solid experience in system and network programming for both Windows and Unix to assist in the development and maintenance of the job control middleware used by our computational chemistry products. 
The ideal candidate will have a minimum of two years experience in system and network programming for both Windows and Unix systems, and be fluent in both Perl and C. You must have significant experience with Python programming. A Bachelor's or Master's degree in Computer Science or an equivalent academic background is required. Frequent interactions with the firm's geographically dispersed groups make exceptional written and oral communication skills essential.
Significant experience with any of the following is a plus:
	*	Commercial software development 
	*	Cross-platform development under UNIX and Windows 
	*	Application architecture design 
	*	Distributed-application development 
	*	Grid application development 
	*	Workflow application development 
	*	Network server development 
	*	Database development 


Thanks,
Diana Rozario 
Associate 
Resource Development (India)
D.E.Shaw India Software Pvt. Ltd. 
http://www.deshawindia.com/
Hyderabad. 

DISCLAIMER: "Any views expressed in this message are those of the individual sender, except where the sender specifically states them to be the views of D. E. Shaw India Software Private Limited., or any of its affiliates" 


From donn at drizzle.com  Sat Feb  4 01:50:46 2006
From: donn at drizzle.com (Donn Cave)
Date: Sat, 04 Feb 2006 06:50:46 -0000
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<donn-C3B8DF.14535302022006@gnus01.u.washington.edu>
	<1138926741.052843.169270@z14g2000cwz.googlegroups.com>
	<donn-AC8404.17325802022006@gnus01.u.washington.edu>
	<1138965780.698016.95590@o13g2000cwo.googlegroups.com>
	<donn-442117.10474803022006@gnus01.u.washington.edu>
	<1139010489.553408.250770@g44g2000cwa.googlegroups.com>
Message-ID: <1139035840.23704@jetspin.drizzle.com>

Quoth n.estner at gmx.de:
| > Still see no problem.  Of course, it goes without saying that
| > Python 2.4 doesn't work this way, but given that it's theoretically
| > possible for f(a) to be resolved similarly to a.f, then I really
| > do not see what you're seeing here.  The kwargs parameter appears
| > irrelevant from where I'm sitting.
|
| Then either you didn't understand my answers, or I didn't understand
| your idea. Could you summarize how exactly "f(x,y=z)" should be
| resolved, i.e. where it should look for "f"?

a.f ==> f(a)

I would agree that I didn't understand your answers, but they weren't
really answers so much as questions, along the lines of ``well then,
how would this work?''  I seem to have missed what you were driving at,
but maybe if you were to just came out and explain the point?

Of course the whole business is kind of a joke, since there is no way
anyone in their right mind would wish to change Python's notation for
such trivial reasons, but there actually are languages that resolve
functions based on argument types.  Overloading in C++ is somewhat
like this, Haskell's typeclass mechanism, and there is a ``multiple
dispatch'' model that I have no experience with but is not without its
supporters.

	Donn Cave, donn at drizzle.com


From mlist at fastwebnet.it  Mon Feb 13 09:07:30 2006
From: mlist at fastwebnet.it (billie)
Date: Mon, 13 Feb 2006 15:07:30 +0100
Subject: Netstat in python. Does it's possible?
References: <s1mHf.5180$9G6.428@tornado.fastwebnet.it>
	<43EE0286.5020409@v.loewis.de>
	<slrndusfol.2t1.grahn+nntp@frailea.sa.invalid>
	<43EE7B7E.5050802@v.loewis.de>
	<slrnduv78b.2t1.grahn+nntp@frailea.sa.invalid>
	<43efaef5$0$29674$9b622d9e@news.freenet.de>
Message-ID: <wo0If.453$uQ4.5@tornado.fastwebnet.it>

Thank you all for your helping.




From sybrenUSE at YOURthirdtower.com.imagination  Sun Feb 19 10:48:01 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Sun, 19 Feb 2006 16:48:01 +0100
Subject: How many web framework for python ?
References: <mailman.2085.1140244423.27775.python-list@python.org>
	<43f8718e$0$7344$626a54ce@news.free.fr>
Message-ID: <slrndvh4ph.at4.sybrenUSE@schuimige.unrealtower.org>

Bruno Desthuilliers enlightened us with:
>> I want to write a web framework for python based on mod_python as
>> my course homework , could you give some advise ?
>
> Yes : forget it.

Why forget it? I've written my own web framework
(http://www.unrealtower.org/) and it works great! It was a good
learning experience in using mod_python. Besides that, I found the
existing frameworks not quite suitable to my taste, and I like my own
much more.

Please, feel free to take a look at it, and let me know what you think
;-)

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From mark at mark-fink.de  Sun Feb  5 04:29:29 2006
From: mark at mark-fink.de (Mark Fink)
Date: 5 Feb 2006 01:29:29 -0800
Subject: jython newbee general question docu / os.fstat
Message-ID: <1139131769.522037.235180@z14g2000cwz.googlegroups.com>

Hi there,

unfortunately I am new to Jython and my "Jython Essentials" book is
still in the mail. I looked into the Jython API Doc but could not find
the information.
I am porting a Python library to Jython and some parts are missing. My
question basically is where do I find information on what to use
instead. E.g. I could not find information on the os module. I do not
find the sys module docu either.
The concrete problem is I have something like os.fstat(infile.fileno())
which provokes:
IOError: fileno() is not supported in jpython.
If this question is already documented somewhere please point me to
this direction. I was not able to find it.

Best Regards,
Mark



From jimlewis at miclog.com  Sat Feb 11 12:03:57 2006
From: jimlewis at miclog.com (swisscheese)
Date: 11 Feb 2006 09:03:57 -0800
Subject: Shortest prime number program
References: <1139652226.869102.310180@g14g2000cwa.googlegroups.com>
	<1139673716.241461.84110@g47g2000cwa.googlegroups.com>
	<1139677135.471361.241740@g14g2000cwa.googlegroups.com>
Message-ID: <1139677437.761328.53030@o13g2000cwo.googlegroups.com>

> 42
Make that 41 and 40.



From http  Thu Feb  2 23:57:13 2006
From: http (Paul Rubin)
Date: 02 Feb 2006 20:57:13 -0800
Subject: How do I dynamically create functions without lambda?
References: <1138389517.896043.7450@g47g2000cwa.googlegroups.com>
	<pan.2006.01.28.00.35.06.174939@REMOVETHIScyber.com.au>
	<1138436008.628882.126510@g44g2000cwa.googlegroups.com>
	<pan.2006.01.28.12.02.34.293286@REMOVETHIScyber.com.au>
	<drr978$oat$1@xenon.Stanford.EDU>
	<1ha3g79.1gcm6x1yziggyN%aleaxit@yahoo.com>
	<drtge7$813$1@xenon.Stanford.EDU>
	<1ha5dnw.1i8vbgl1tfjdcnN%aleaxit@yahoo.com>
Message-ID: <7xfyn111li.fsf@ruckus.brouhaha.com>

aleaxit at yahoo.com (Alex Martelli) writes:
> Now Lisp (or Haskell, etc) I could easily see.  But why should Python
> tend to correlate with "high skill", when, as you point out, it's in
> fact _simpler_?!  My current working hypothesis: Python has never been
> marketed and hyped the way Java and C# &c have; somebody who CHOOSES
> Python shows some ability to think for themselves, rather than following
> the herd, and such ability correlated with programming skill.

Python also has a type of beauty to it (despite warts here and there),
so someone who chooses it probably has better attunement to
well-designed software than someone who chooses an uglier but equally
obscure language.  That attunement would correlate with skill.


From bonono at gmail.com  Thu Feb  9 08:38:49 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 9 Feb 2006 05:38:49 -0800
Subject: removing characters before writing to file
In-Reply-To: <1139452501.421306.44080@f14g2000cwb.googlegroups.com>
References: <1139452501.421306.44080@f14g2000cwb.googlegroups.com>
Message-ID: <1139492329.812599.230280@g43g2000cwa.googlegroups.com>


eight02645999 at yahoo.com wrote:
> hi
> i have some output that returns a lines of tuples eg
>
> ('sometext1', 1421248118, 1, 'P ')
> ('sometext2', 1421248338, 2, 'S ')
> and so on
> ....
>
> I tried this
> re.sub(r" '() ",'',str(output)) but it only get rid of the ' and not
> the braces. I need to write the output to a file such that
>
> sometext1, 1421248118, 1, P
> sometext2, 1421248338, 2, S
>
> I also tried escaping , re.sub(r" '\(\) ",'',str(output)) but also did
> not work
> How can i get rid of the braces before writing to file? thanks

If it is as uniform as shown, may be you can strip them.

"('something', 1234, 1, 'P ')".strip(" ()")



From phil at riverbankcomputing.co.uk  Mon Feb 20 17:54:05 2006
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Mon, 20 Feb 2006 22:54:05 +0000
Subject: PyQt and Threading to update a dialog?
In-Reply-To: <dtde8b$pbv$03$1@news.t-online.com>
References: <dtde8b$pbv$03$1@news.t-online.com>
Message-ID: <200602202254.05766.phil@riverbankcomputing.co.uk>

On Monday 20 February 2006 10:07 pm, Fabian Steiner wrote:
> Hello!
>
> I have just written a MyDialog class which is derived from the orginial
> QDialog class. MyDialog only possesses a QLabel and a QPushButton. Now I
> would like to get the QLabel updated every second so that it displays
> the current time.
> I think I will have to work with Threads in order to achieve this aim,
> but so far I didn't succeed in doing it because I couldn't find any
> examples.
>
> Could anyone give me some hints or a piece of code?

So long as you have the event loop running it's probably easiest to use a 
QTimer that connects to a slot in your QDialog sub-class.

No need to use threads.

Phil


From jasonsmith008 at charter.net  Wed Feb  8 11:12:15 2006
From: jasonsmith008 at charter.net (jason)
Date: Wed, 8 Feb 2006 11:12:15 -0500
Subject: RPy / R
References: <kiWFf.507$U35.88@fe02.lga> <43e99d61@news.comindico.com.au>
Message-ID: <hNoGf.33$lw5.5@fe03.lga>

Thanks for your response. I'll try to install all the same versions that you 
have.

I have removed my version of Python and installed ActivePython 
(ActivePython-2.4.2.10-win32-x86.msi).

Could you please tell me which versions of the following you have installed:
NumPy
SciPy
RPy
R

I have not installed Numeric. Is that different from NumPy? If so, which 
version do you have?

Thanks.

"Eddie" <FASTedob at XXhomemail.YEScom.OZau> wrote in message 
news:43e99d61 at news.comindico.com.au...
> Hi Jason
>
> I had more success, being able to run a few test programs.
> Not sure why yours would be crashing - I have a similar setup (Win XP SP2 
> with all updates) - my version of Python is the Activestate download 
> (ActivePython-2.4.2.10-win32-x86.msi). Have you installed Numeric?
> If all else fails might be worth trying to unistall Python and installing 
> the Activestate version (which includes the Win32 extensions).
>
> Good luck
>
> Eddie
>
> jason wrote:
>> Hello:
>>
>> I installed the following:
>>
>> python-2.4.2.msi
>> pywin32-207.win32-py2.4.exe
>> R-2.2.1-win32.exe
>> rpy-0.4.6-R-2.0.0-to-2.2.1-py24.win32.exe
>>
>> on a Windows XP (SP2) box.
>>
>> [SNIP]
>>
>> Is this a setup issue? Thanks for your help.
>> 



From kent at kentsjohnson.com  Fri Feb 24 10:49:02 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Fri, 24 Feb 2006 10:49:02 -0500
Subject: a little more help with python server-side scripting
In-Reply-To: <xNFLf.1672$No6.39067@news.tufts.edu>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<dSoLf.1663$No6.38996@news.tufts.edu> <dtmhot$4t4$1@wake.carmen.se>
	<nTELf.1667$No6.38886@news.tufts.edu>
	<43ff1d75$1_1@newspeer2.tds.net>
	<xNFLf.1672$No6.39067@news.tufts.edu>
Message-ID: <43ff2660$1_2@newspeer2.tds.net>

John Salerno wrote:
> Kent Johnson wrote:
> 
>> John Salerno wrote:
>>
>>> Magnus Lycka wrote:
>>>
>>>> The other option is ASP. You have been given information about
>>>> that already. Be aware that ASP does not imply VBScript. You can
>>>> use Python in ASP as long as that's enabled. It seems to be exactly
>>>> what you are asking for, so I don't understand why you seem to reject
>>>> it. Don't you like the file name endings?
>>>
>>>
>>>
>>> Maybe I'm misunderstanding what is meant when you say to use ASP. I'm 
>>> thinking that it involves having to learn another language (such as 
>>> C# with ASP.NET), instead of writing my code in Python. Is that not 
>>> the case?
>>
>>
>> See http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B276494
>>
>> The last example on this page is exactly what you have been asking for.
>>
>> Kent
> 
> 
> But isn't this code:
> 
> Response.Write('Python Test<br>')
> Response.write('<h3>Smaller heading</hr>')
> 
> written using ASP instead of Python?

No, it's Python code that calls the Write() method on the Response 
object that is exposed by ASP.

Kent


From bob.python at yahoo.com  Thu Feb 23 19:27:03 2006
From: bob.python at yahoo.com (Bob)
Date: 23 Feb 2006 16:27:03 -0800
Subject: How would you open this file?
In-Reply-To: <43FE4D76.6090605@websafe.com>
References: <1140735212.419265.219980@e56g2000cwe.googlegroups.com>
	<43FE4D76.6090605@websafe.com>
Message-ID: <1140740823.830031.41120@u72g2000cwu.googlegroups.com>

Thanks all! That helps out a lot!

Python is kinda' cool...



From steve at REMOVETHIScyber.com.au  Fri Feb 24 08:28:30 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sat, 25 Feb 2006 00:28:30 +1100
Subject: A C-like if statement
References: <hp-dnY20cusOnGPeRVn-rg@nmt.edu> <dtl04p$5q2$1@reader2.panix.com>
	<sdadnS6nfNnbmmPeRVn-sw@nmt.edu>
	<pan.2006.02.23.22.14.53.56541@REMOVETHIScyber.com.au>
	<1140742149.011750.321530@z34g2000cwc.googlegroups.com>
	<pan.2006.02.24.09.58.32.497698@REMOVETHIScyber.com.au>
	<1140775322.788083.256970@v46g2000cwv.googlegroups.com>
	<pan.2006.02.24.11.07.19.764837@REMOVETHIScyber.com.au>
	<roy-5A1B56.08034924022006@reader2.panix.com>
Message-ID: <pan.2006.02.24.13.28.18.727224@REMOVETHIScyber.com.au>

On Fri, 24 Feb 2006 08:03:49 -0500, Roy Smith wrote:

> In article <pan.2006.02.24.11.07.19.764837 at REMOVETHIScyber.com.au>,
>  Steven D'Aprano <steve at REMOVETHIScyber.com.au> wrote:
> 
>> Side-effects aren't always bad (import, for example, does all its work by
>> side-effect). But they are generally frowned upon, and in functional
>> languages they are verboten.
> 
> How do you do any I/O in a functional language if side effects are 
> verboten?  For that matter, how does a functional program ever stop running?

Fair enough.

But still, ignoring unavoidable cases like writing to a file, the ideal of
functional languages is for side-effects to not exist.



-- 
Steven.



From leknarf at pacbell.net  Wed Feb  8 12:34:09 2006
From: leknarf at pacbell.net (Scott Frankel)
Date: Wed, 8 Feb 2006 09:34:09 -0800
Subject: email questions
Message-ID: <FDD3FDB3-EF9C-4F85-9599-37AF617DED18@pacbell.net>


I'm looking for a way to send a simple, plain text email message  
using Python.  My initial attempts are failing with the following error:

	socket.error: (61, 'Connection refused')

Does this imply that I do not have the machine's smtp server  
running?  (I don't; and I'd like to avoid setting it up.)

I'm following example code in the lib ref docs:

 >>> s = smtplib.SMTP()
 >>> s.connect()
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "/Library/Frameworks/Python.framework/Versions/2.4/lib/ 
python2.4/smtplib.py", line 303, in connect
     raise socket.error, msg
socket.error: (61, 'Connection refused')


Python 2.4.1
MacOSX 10.4.3


Is there a better/easier way to send a plain text message?

Thanks in advance!
Scott


From bronger at physik.rwth-aachen.de  Wed Feb 22 04:15:21 2006
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Wed, 22 Feb 2006 10:15:21 +0100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com> <43fbc788@usenet01.boi.hp.com>
Message-ID: <87u0ar3gba.fsf@wilson.homeunix.com>

Hall?chen!

Peter Mayne <Peter.Mayne at hp.com> writes:

> Torsten Bronger wrote:
>
>> My definiton would be that an interpreted language has in its
>> typical implementation an interpreting layer necessary for typical
>> hardware.  Of couse, now we could discuss what is "typical",
>> however, in practice one would know it, I think.  In case of Python:
>> CPython and all important modern processors.
>
> In a previous century, I used something called UCSD Pascal, which at
> the time was a typical implementation of Pascal.

Not "a" typical implementation but "its".

> [...]
>
> And, as someone in this thread has pointed out, it is likely that
> your important modern (x86) processor is not natively executing
> your x86 code, and indeed meets your definition of having "in its
> typical implementation an interpreting layer necessary for typical
> hardware".

Only if you deliberately misunderstand me.

> Another example: is Java the bytecode, which is compiled from Java
> the language, interpreted or not? Even when the HotSpot JIT cuts
> in?

It is partly interpreted and partly compiled.  That's why it's
faster than Python.

> [...]
>
> Personally, in practice I don't care, so don't ask me. Ponder on
> getting angels to dance on the head of a pin before you worry
> about whether the dance can be interpreted or not.

I agree that the term "interpreted" is bad Python advocacy because
its implications are often misunderstood.  However, I think that
it's fair to make a distiction between compiled and interpreted
languages because it may affect one's decision for one or the other.
Although I'm surely not ingenious, I can make this distinction.

The reason why Python is slower than C is because there is an
interpreting layer that C doesn't have.  And the reason for this is
that Python's nature is incompatible with today's CPUs (which was a
deliberate and advantageous design decision).  I'm sure that a
willing CS person could define this more clearly.

Anyway, if we drop "scripting" and drop "interpreted", what do you
want to tell people asking why Python is so slow?  Because it is
dynamic?  ;-)

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus            ICQ 264-296-646


From max at alcyone.com  Mon Feb 13 01:52:30 2006
From: max at alcyone.com (Erik Max Francis)
Date: Sun, 12 Feb 2006 22:52:30 -0800
Subject: how do you pronounce 'tuple'?
In-Reply-To: <vuednQcT5sUEn23eRVn-iA@rcn.net>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
Message-ID: <F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>

John Salerno wrote:

> Yes, silly question, but it keeps me up at night.  :)
> 
> I know it comes from the suffix -tuple, which makes me think it's 
> pronounced as 'toople', but I've seen (at m-w.com) that the first 
> pronunciation option is 'tuhple', so I wasn't sure. Maybe it's both, but 
> which is most prevalent?
> 
> Thanks! Now time to go back to reading the chapter on tuples...

I believe both is right.  Those who come from a pure mathematics 
background are more likely to pronounce it _toople_.  Those who have 
encountered it in the wild are more likely to pronounce it _tuhple_.  I 
had enough of an understanding of mathematics to recognize where it came 
from when I encountered it in Python, but I pronounce it the latter way.

Even in mathematics, a tuple, or formally an n-tuple, makes more sense 
to me pronounced the latter if you list out the various pronounciations 
for large n, seems me the _uhs_ outweigh the _oos_.  (There's quadruple 
on one side, but then quintuple, sextuple, septuple, heptuple, octuple, 
etc., etc., etc.)

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   We are victims of our circumstance.
   -- Sade Adu


From strombrg at dcs.nac.uci.edu  Thu Feb 16 23:39:20 2006
From: strombrg at dcs.nac.uci.edu (Dan Stromberg)
Date: Fri, 17 Feb 2006 04:39:20 GMT
Subject: Sendmail "ok" signal?
References: <1140104177.989381.292550@z14g2000cwz.googlegroups.com>
Message-ID: <pan.2006.02.17.04.42.31.775922@dcs.nac.uci.edu>

On Thu, 16 Feb 2006 07:36:18 -0800, Gaz wrote:

> Hey. I looked at the Sendmail help and did not find a property where i
> can get an "ok" signal when the email is finally sent. I need something
> like that to show a "Processing, please stand by" screen when the
> server is sending an email, and when the email is out, another screen
> appears with an "Email sent" message.
> 
> Do you know an alternative to the "ok" from the sendmail to do this?

It depends on how you're talking to the mail server.

If you're opening a pipe to "/usr/lib/sendmail recipient-list" or
"/usr/sbin/sendmail recipient-list" (some *ix hosts have one, or the
other, or both - few have neither), then I believe about all you have to
go on is the exit status from the subprocess.

If you're connecting to host:25/tcp, then you get an informative return
code each time you issue an SMTP command.  You can get this same effect,
more or less, by opening a pipe to /usr/lib/sendmail -bs or
/usr/sbin/sendmail -bs as well.

And yes, sendmail and other MTA's that speak SMTP will accept
responsibility for a message well before it gets to its final destination.
However, once they accept the message, they are to do everything in their
power to make sure the message doesn't get lost, even if it means having
to deliver it twice instead of 0 times.  They'll write things to disk even
when it'd be faster to just leave it in memory and past it along via the
network, for example - because otherwise a power failure might mean a
message would get lost.





From martin at v.loewis.de  Mon Feb 13 13:36:23 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 13 Feb 2006 19:36:23 +0100
Subject: Location of Python modules
In-Reply-To: <1139854910.669876.84730@o13g2000cwo.googlegroups.com>
References: <1139854184.504114.46690@z14g2000cwz.googlegroups.com>
	<1139854642.175799.165950@g43g2000cwa.googlegroups.com>
	<1139854910.669876.84730@o13g2000cwo.googlegroups.com>
Message-ID: <43F0D1A7.8000501@v.loewis.de>

Byte wrote:
> No, not there

Sure:

martin at mira:~$ ls /usr/lib/python2.4/site-packages
apt          debconf.py                Numeric      pygtk.py
     README
apt_inst.so  debconf.pyc               Numeric.pth  pygtk.pyc
     setuptools-0.6a8-py2.4.egg
apt_pkg.so   easy-install.pth          ORBit.la     pygtk.pyo
     setuptools.pth
cairo        FormEncode-0.4-py2.4.egg  ORBit.so     pygtk.py.python2.4-gtk2
cairo.pth    gtk-2.0                   pygtk.pth    python-support.pth


You mean, on *your* Linux? Give me an SSH account to your machine,
and I find out for you.

Regards,
Martin


From roccomoretti at hotpop.com  Tue Feb 14 11:53:14 2006
From: roccomoretti at hotpop.com (Rocco Moretti)
Date: Tue, 14 Feb 2006 10:53:14 -0600
Subject: Python 3000 deat !? Is true division ever coming ?
In-Reply-To: <mailman.1906.1139933770.27775.python-list@python.org>
References: <1139810036.943598.229030@g47g2000cwa.googlegroups.com>	<1139928242.726349.221080@g44g2000cwa.googlegroups.com>
	<mailman.1906.1139933770.27775.python-list@python.org>
Message-ID: <dst1tm$jbb$1@news.doit.wisc.edu>

Gregory Pi?ero wrote:
> On 14 Feb 2006 06:44:02 -0800, rainbow.cougar at gmail.com
> 
> 
>>5./2.=2.5 is floating point math, with all the round off errors that
>>incorporates.
> 
> Thanks Curtis, I never knew that trick.  I guess for variables do have
> true division you have to make them floats?  e.g.
> float(var1)/float(var2)?  Or do you know a less typing approach for
> that?

Google "python true division" -> I'm feeling lucky:

http://www.python.org/doc/2.2.3/whatsnew/node7.html

 From the web page:

"""
* By including a from __future__ import division in a module(*), the / 
operator will be changed to return the result of true division, so 1/2 
is 0.5. Without the __future__ statement, / still means classic 
division. The default meaning of / will not change until Python 3.0.
"""

*As the first non-docstring/non-comment line.

Note that that's for a module -- the interactive interpreter won't 
respond the same way to the "from __future__ import" statement.


From http  Sun Feb 12 15:27:34 2006
From: http (Paul Rubin)
Date: 12 Feb 2006 12:27:34 -0800
Subject: Small newbie question
References: <1139774104.070375.235480@z14g2000cwz.googlegroups.com>
Message-ID: <7xy80gwceh.fsf@ruckus.brouhaha.com>

> while x < 5:
>     x = uniform(1, 5)
>     if x >= 1 <= 1.999: print 'SuSE'
> ...
> It dosnt work: only keep printing SuSE. Please help,

Try this:

     x = 27.6
     if x >= 1 <= 1.999: print 'SuSE'

It prints 'SuSE' because the test is written incorrectly.  You want:

    if 1 <= x <= 1.999: print 'SuSE'


From tim.leeuwvander at nl.unisys.com  Tue Feb 14 09:37:46 2006
From: tim.leeuwvander at nl.unisys.com (Tim N. van der Leeuw)
Date: 14 Feb 2006 06:37:46 -0800
Subject: 88k regex = RuntimeError
In-Reply-To: <dssd1p$spr$02$1@news.t-online.com>
References: <1139900873.361930.135880@g44g2000cwa.googlegroups.com>
	<dssd1p$spr$02$1@news.t-online.com>
Message-ID: <1139927866.369896.166310@g47g2000cwa.googlegroups.com>

This is basically the same idea as what I tried to describe in my
previous post but without any samples.
I wonder if it's more efficient to create a new list using a
list-comprehension, and checking each entry against the 'wanted' set,
or to create a new set which is the intersection of set 'wanted' and
the iterable of all matches...

Your sample code would then look like this:

>>> import re
>>> r = re.compile(r"\w+")
>>> file_content = "foo bar-baz ignored foo()"
>>> wanted = set(["foo", "bar", "baz"])
>>> found = wanted.intersection(name for name in r.findall(file_content))
>>> print found
set(['baz', 'foo', 'bar'])
>>>

Anyone who has an idea what is faster? (This dataset is so limited that
it doesn't make sense to do any performance-tests with it)

Cheers,

--Tim



From sanzhiyan at gmail.com  Thu Feb  2 02:06:51 2006
From: sanzhiyan at gmail.com (Saizan)
Date: Thu, 02 Feb 2006 08:06:51 +0100
Subject: howto catch an Exception and still print the TraceBack?
In-Reply-To: <43e073bd$0$341$5fc30a8@news.tiscali.it>
References: <43e073bd$0$341$5fc30a8@news.tiscali.it>
Message-ID: <43e1af8b$0$343$5fc30a8@news.tiscali.it>

Thanks, I had completely missed the module traceback...
I'll use traceback.print_exc(), it seems the most straightforward way.
The only flaw is that the traceback starts in the method where i catch the exception and not from "__main__", but I guess it can't be helped.


From doug.bromley at gmail.com  Mon Feb 20 07:27:45 2006
From: doug.bromley at gmail.com (Doug Bromley)
Date: Mon, 20 Feb 2006 12:27:45 +0000
Subject: editor for Python on Linux
In-Reply-To: <43F9B473.80901@pollenation.net>
References: <dtai6e$23m$2@ariane.blic.net> <43F9B473.80901@pollenation.net>
Message-ID: <288425520602200427o13797355lc9909e72db5f50e0@mail.gmail.com>

I did a review of Python IDE's at my blog.  If you're interested you can
take a look:
http://www.straw-dogs.co.uk/blog/python-ide-review

I have a couple of links to other reviews on there too.  Worth a look if
you're trying to find a good IDE.

On 2/20/06, Tim Parkin <tim at pollenation.net> wrote:
>
> Mladen Adamovic wrote:
>
> >Hi!
> >
> >I wonder which editor or IDE you can recommend me for writing Python
> >programs. I tried with jEdit but it isn't perfect.
> >
> >
> >
> I've been using wing for quite some time and it's an excellent dedicated
> editor for python. If you want flexible debugging in a gui environment
> it's hard to beat.
>
> Tim Parkin
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From dananrg at yahoo.com  Tue Feb 28 11:55:33 2006
From: dananrg at yahoo.com (dananrg at yahoo.com)
Date: 28 Feb 2006 08:55:33 -0800
Subject: Best python module for Oracle, but portable to other RDBMSes
In-Reply-To: <43ff852a$0$11074$636a55ce@news.free.fr>
References: <1140818561.458171.237850@p10g2000cwp.googlegroups.com>
	<43ff852a$0$11074$636a55ce@news.free.fr>
Message-ID: <1141145733.351179.5880@p10g2000cwp.googlegroups.com>

What would be the next best Oracle database module for Python next to
cx_oracle? I'd like to compare two and choose one, just for the sake of
seeing how two modules doing the same thing operate.

Also, does installing cx_oracle create registry entries or require
admin privs on a Windows XP machine? I see that cx_oracle is
distributed as an EXE.

Thanks.



From sybrenUSE at YOURthirdtower.com.imagination  Sun Feb 19 16:10:02 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Sun, 19 Feb 2006 22:10:02 +0100
Subject: How many web framework for python ?
References: <mailman.2085.1140244423.27775.python-list@python.org>
	<43f8718e$0$7344$626a54ce@news.free.fr>
	<slrndvh4ph.at4.sybrenUSE@schuimige.unrealtower.org>
	<1140372119.816674.315130@g44g2000cwa.googlegroups.com>
Message-ID: <slrndvhnla.9mc.sybrenUSE@schuimige.unrealtower.org>

Ville Vainio enlightened us with:
> When you write your own framework, you are helping yourself.

True. And if that doesn't have a negative effect on others (which I
think it doesn't) there is nothing wrong with that.

> If you use an existing framework and possibly contribute patches to
> it, you help other people too.

Also true, but there is more to it. If I can create my own framework,
get more experienced, and be able to spare time in the long run
because I can quickly implement features I want, it makes me a more
efficient and experienced person. That leaves me more useful when
helping people, and gives me more time to help them too.

> - Other people have already solved your problems

I have no problems. My web framework is working just as I want it to.

> also problems that you can't think of yet.

What problems didn't I think of yet?

> - Not reusing code is just plain evil.

I'm using mod_python, Cheetah, SQLObject and PostgreSQL. I publish all
my own code under an Open Source license so other people can learn
from and contribute to it. How am I not reusing code?

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From amnon.friling at citicorp.com  Wed Feb 15 21:04:18 2006
From: amnon.friling at citicorp.com (alf)
Date: 15 Feb 2006 18:04:18 -0800
Subject: HTTP & tcl
Message-ID: <1140055458.631283.202510@f14g2000cwb.googlegroups.com>

Hi

I would like to convert the wctpXml-1.3.py program to Tcl (line by
line).
See http://sourceforge.net/project/showfiles.php?group_id=29217
This program sends pages using WCTP.  I know nothing about Python or
XML but this program is small and seems straightforward and I am sure
that I will be able to figure it out - with a little help ;-)
Currently I am stuck in not being able to identify the Tcl equivalent
of Python's "putrequest", as in:
h = httplib.HTTP("wctp.skytel.com",80)
h.putrequest("POST","/wctp")

Thanks
alf



From claudio.grondi at freenet.de  Sat Feb 18 05:48:52 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Sat, 18 Feb 2006 11:48:52 +0100
Subject: GDI in python>?
In-Reply-To: <1140242543.204760.174390@g44g2000cwa.googlegroups.com>
References: <1140242543.204760.174390@g44g2000cwa.googlegroups.com>
Message-ID: <dt6u2m$eso$1@newsreader3.netcologne.de>

al pacino wrote:
> hi,
> 
> is it possible to address the  'screen pixels' using python , like
> analogous to older dos( functions that graphics.h provides') or win api
> calls for gdi.
> 
> what i want is to display clusters (in differetn colours) on screen
> using python.
> 
> thanks.
> 
Sure. The problem will be to choose the right tool from the myriads of 
available ones.

I have some experience with PyGame
   http://www.pygame.org/news.html
which is built on top of SDL
   http://www.libsdl.org/index.php
and find it easy to understand and use.

Don't be fooled by the 'Game' part - PyGame is as useful as SDL (a very 
good library).

Claudio


From apgwoz at gmail.com  Tue Feb  7 09:35:24 2006
From: apgwoz at gmail.com (Andrew Gwozdziewycz)
Date: Tue, 7 Feb 2006 09:35:24 -0500
Subject: Natural Language Date Processing.
In-Reply-To: <1139320300.289408.177590@g14g2000cwa.googlegroups.com>
References: <mailman.1544.1139316354.27775.python-list@python.org>
	<1139320300.289408.177590@g14g2000cwa.googlegroups.com>
Message-ID: <8ba244fb0602070635v7599f107x4c2c9477cf974096@mail.gmail.com>

On 7 Feb 2006 05:51:40 -0800, andychambers2002 at yahoo.co.uk
> It seems that the string to be parsed has to be provided in the GNU
> date format.  One option would be to provide a function that calls out
> to the the GNU date program with whatever string you want to parse.

Actually, I looked at the source of the php function and it manually
parses it (i assume according to the GNU date rules). However, i'd
prefer not to have to port the function to python if someone else has
already done so, or has a more pythonic implementation.


--
Andrew Gwozdziewycz <apgwoz at gmail.com>
http://ihadagreatview.org
http://plasticandroid.org


From luismgz at gmail.com  Fri Feb 17 10:13:46 2006
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 17 Feb 2006 07:13:46 -0800
Subject: how to get function names from the file
In-Reply-To: <1140041284.767171.85400@f14g2000cwb.googlegroups.com>
References: <1140041022.500870.141430@g14g2000cwa.googlegroups.com>
	<1140041284.767171.85400@f14g2000cwb.googlegroups.com>
Message-ID: <1140189226.439856.228570@g14g2000cwa.googlegroups.com>

"eval" is not necessary in this case.
If you have a tuple with function names such as this: x=(printFoo,
printFOO)

you can execute them this way:

>>> for f in x:
	f()



From brianomorchoe at yahoo.co.uk  Mon Feb  6 17:27:57 2006
From: brianomorchoe at yahoo.co.uk (Brain Murphy)
Date: Mon, 6 Feb 2006 22:27:57 +0000 (GMT)
Subject: python
Message-ID: <20060206222757.3277.qmail@web25701.mail.ukl.yahoo.com>

I am new to python and programming but i was wondering, what can i program with python??
  Brian

		
---------------------------------
Yahoo! Photos ? NEW, now offering a quality print service from just 8p a photo.
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From albalmer at att.net  Tue Feb 14 19:26:08 2006
From: albalmer at att.net (Al Balmer)
Date: Tue, 14 Feb 2006 17:26:08 -0700
Subject: Xah's Edu Corner: accountability & lying thru the teeth
References: <1133844932.007824.26780@g43g2000cwa.googlegroups.com>
	<1134780763.066592.45390@g49g2000cwa.googlegroups.com>
	<1135405908.381150.133190@o13g2000cwo.googlegroups.com>
	<1136236586.734775.212440@f14g2000cwb.googlegroups.com>
	<1137784561.589887.58380@o13g2000cwo.googlegroups.com>
	<1139909629.798938.284160@g47g2000cwa.googlegroups.com>
	<45dmspF66tepU1@individual.net>
	<r9uIf.8084$lG2.2039@news-wrt-01.rdc-nyc.rr.com>
Message-ID: <n5t4v1tme5eaa5jmhfpqusd85ajfpliunh@4ax.com>

On Tue, 14 Feb 2006 23:59:19 GMT, Kenny Tilton
<NOktiltonSPAM at nyc.rr.com> wrote:

>Ulrich Hobelmann wrote:
>> Xah Lee wrote:
>> 
>>> here's a site: http://www.longbets.org/bets that takes socially
>>> important predictions. I might have to enter one or two.
>>>
>>> i longed for such a accountable predictions for a long time. Usually,
>>> some fucking fart will do predictions, but the problem is that it's not
>> 
>> [...]
>> 
>> OMG, he's back.
>> 
>> I predict, Xah will haunt us for years to come.
>> 
>
>WTF is wrong with Xah? He posts an occasional article in good faith and 
>leaves it at that. ignoring the insults that follow.

Apparently you've never actually read one of his articles.
>
>In the end we have one good-faith article and a bunch of personal 
>attacks from a Usenet chorus of self-appointed finger-shakers creating 
>more pollution than he ever did.
>
>If only some of the people castigating Xah for daring to use Usenet 
>would post as rarely as he, and show as much restraint.
>
Restraint? Now I know you haven't read it.

-- 
Al Balmer
Sun City, AZ


From kay.schluehr at gmx.net  Mon Feb 13 02:30:28 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 12 Feb 2006 23:30:28 -0800
Subject: ordered sets operations on lists..
In-Reply-To: <43ef8e5f.625119424@news.oz.net>
References: <mailman.1722.1139590689.27775.python-list@python.org>
	<1139592166.993686.212000@f14g2000cwb.googlegroups.com>
	<1139599834.975607.77180@f14g2000cwb.googlegroups.com>
	<1halbdx.dd0p1l1obawfkN%aleaxit@yahoo.com>
	<43ef8e5f.625119424@news.oz.net>
Message-ID: <1139815828.335417.33000@z14g2000cwz.googlegroups.com>

Bengt Richter wrote:

> Perhaps newbies should be advised that
>
>     [x for x in l1 if x in set(l2)]

But the resulting list is a representative of bag not a set ( contains
multiple occurrences of  elements ):

>>> [x for x in [3, 3] if s in Set([3])]
[3,3]

Same with Raymonds solution:

>>> filter(Set([3]).__contains__, [3,3]) 
[3, 3]

Kay



From michaeltaft at gmail.com  Sun Feb 12 21:42:23 2006
From: michaeltaft at gmail.com (mwt)
Date: 12 Feb 2006 18:42:23 -0800
Subject: Downloading Large Files -- Feedback?
In-Reply-To: <1hanqts.1ebz9k41w8qll3N%aleaxit@yahoo.com>
References: <1139773494.245577.102870@g47g2000cwa.googlegroups.com>
	<1hanf3e.1j28qll1hnvr5qN%aleaxit@yahoo.com>
	<1139793676.885331.295390@g14g2000cwa.googlegroups.com>
	<1hanqts.1ebz9k41w8qll3N%aleaxit@yahoo.com>
Message-ID: <1139798543.353098.280610@g44g2000cwa.googlegroups.com>

So, I just put this little chunk to the test, which does give you
feedback about what's going on with a file download. Interesting that
with urlretrieve, you don't do all the file opening and closing stuff.

Works fine:

------------------
import urllib

def download_file(filename, URL):
    f = urllib.urlretrieve(URL, filename, reporthook=my_report_hook)

def my_report_hook(block_count, block_size, total_size):
    total_kb = total_size/1024
    print "%d kb of %d kb downloaded" %(block_count *
(block_size/1024),total_kb )

if __name__ == "__main__":
   download_file("test_zip.zip","http://blah.com/blah.zip")



From sybrenUSE at YOURthirdtower.com.imagination  Fri Feb 24 14:06:49 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Fri, 24 Feb 2006 20:06:49 +0100
Subject: How to send an email with non-ascii characters in Python
References: <1140775736.341876.314070@t39g2000cwt.googlegroups.com>
	<slrndvtn7p.e6o.sybrenUSE@schuimige.unrealtower.org>
	<1140777219.636561.47960@e56g2000cwe.googlegroups.com>
Message-ID: <slrndvuma9.f5e.sybrenUSE@schuimige.unrealtower.org>

Lad enlightened us with:
> and can give me an example of  Python code that can send such
> email??

Not really, but I'm sure this will help you. In fact, my last name has
an umlaut on the 'u'. This is the From header in my emails, encoded in
Latin-1:

From: Sybren =?iso-8859-1?Q?St=FCvel?= <sybren at thirdtower.com>

You must ensure that there are no spaces in the specially encoded
part. So if I'd encode my first name too, it would be:

=?iso-8859-1?Q?Sybren?= =?iso-8859-1?Q?St=FCvel?=

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From kent at kentsjohnson.com  Thu Feb 23 09:57:33 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Thu, 23 Feb 2006 09:57:33 -0500
Subject: No (and a meaningless subject here too!)
In-Reply-To: <1140702045.812136.104980@g43g2000cwa.googlegroups.com>
References: <1140534490.873612.64280@g47g2000cwa.googlegroups.com>
	<dtfhv7$css$1@sea.gmane.org>
	<mailman.2265.1140551970.27775.python-list@python.org>
	<1140619645.303344.317890@g14g2000cwa.googlegroups.com>
	<j-x*9gY-q@news.chiark.greenend.org.uk>
	<1140629467.849254.285410@g43g2000cwa.googlegroups.com>
	<4tjqv1dnpv80m1k412ecjmsncqgsv8quik@4ax.com>
	<1140702045.812136.104980@g43g2000cwa.googlegroups.com>
Message-ID: <43fdc8d3$1_2@newspeer2.tds.net>

Gaz wrote:
> Aye, but i dont need to run an FTP daemon every time i want to upload
> an image to Imageshack or any other website.

Did you google 'python cgi file upload' yet? Several people have pointed 
you to an answer that doesn't use FTP.


From cdkrug at aol.com  Wed Feb  8 17:57:15 2006
From: cdkrug at aol.com (Charles Krug)
Date: Wed, 08 Feb 2006 16:57:15 -0600
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<GrGdnYYzsbcBLH_eRVn-iQ@comcast.com>
	<mailman.1372.1138945618.27775.python-list@python.org>
	<1138967950.697932.213160@g49g2000cwa.googlegroups.com>
	<1139406280.895957.237960@g14g2000cwa.googlegroups.com>
Message-ID: <oOmdndw_p_HW6nfeRVn-vA@comcast.com>

On 2006-02-08, Ben Wilson <dausha at gmail.com> wrote:
> "But the point is, the current situation is not newbie-friendly (I can
> tell, I am a newbie)"
>
> I will agree to that, as I consider myself still new. _But_, it's a
> stumbling stone only briefly. Get enough nagging error messages, and
> you learn and move on. I agree with the grandparent poster that it is a
> perfect self-documenting thing, as the use of 'self' is pretty obvious.
> For a language that one can learn in a short time, this is a tempest in
> a teacup.
>

This old C hound finds it much more sensible than C++ or Java, where the
"self" parameter (called "this") is implicit rather than explicit and
you just sorta kinda hafta "know" it's there and the correct syntax to
use to reference it.

Then there's all the places where you need a Secret Decoder Ring--in
Java you have to define the equivalents of stdout and stdin as they
aren't provided.  In c++ you can't overload the << operator in your
class, you have to use a "friend" function and you have to return an
ostream--the "Rule of Three" for constructors, and just generally lots
of small knotty issues to bite beginners.

9 times out of 10, Python "Just Works" the first time and things do what
your mind says they "should" without having to learn a seventeen special
cases to everything.

IMO, YMMV, Not Valid in Vermont, Happy Fun Ball may accellerate to
dangerous speeds.  Do NOT taunt Happy Fun Ball.




From python at rcn.com  Mon Feb  6 21:39:34 2006
From: python at rcn.com (Raymond Hettinger)
Date: 6 Feb 2006 18:39:34 -0800
Subject: * 'struct-like' list *
In-Reply-To: <1139245389.529742.317110@g43g2000cwa.googlegroups.com>
References: <1139245389.529742.317110@g43g2000cwa.googlegroups.com>
Message-ID: <1139279974.075753.299710@g14g2000cwa.googlegroups.com>

[Ernesto]
> I'm still fairly new to python, so I need some guidance here...
>
> I have a text file with lots of data.  I only need some of the data.  I
> want to put the useful data into an [array of] struct-like
> mechanism(s).  The text file looks something like this:
>
> [BUNCH OF NOT-USEFUL DATA....]
>
> Name:  David
> Age: 108   Birthday: 061095   SocialSecurity: 476892771999
>
> [MORE USELESS DATA....]
>
> Name........
>
> I would like to have an array of "structs."  Each struct has
>
> struct Person{
>     string Name;
>     int Age;
>     int Birhtday;
>     int SS;
> }
>
> I want to go through the file, filling up my list of structs.
>
> My problems are:
>
> 1.  How to search for the keywords "Name:", "Age:", etc. in the file...
> 2.  How to implement some organized "list of lists" for the data
> structure.

Since you're just starting out in Python, this problem presents an
excellent opportunity to learn Python's two basic approaches to text
parsing.

The first approach involves looping over the input lines, searching for
key phrases, and extracting them using string slicing and using
str.strip() to trim irregular length input fields.  The start/stop
logic is governed by the first and last key phrases and the results get
accumulated in a list.  This approach is easy to program, maintain, and
explain to others:

# Approach suitable for inputs with fixed input positions
result = []
for line in inputData.splitlines():
    if line.startswith('Name:'):
        name = line[7:].strip()
    elif line.startswith('Age:'):
        age = line[5:8].strip()
        bd = line[20:26]
        ssn = line[45:54]
        result.append((name, age, bd, ssn))
print result

The second approach uses regular expressions.  The pattern is to search
for a key phrase, skip over whitespace, and grab the data field in
parenthesized group.  Unlike slicing, this approach is tolerant of
loosely formatted data where the target fields do not always appear in
the same column position.  The trade-off is having less flexibility in
parsing logic (i.e. the target fields must arrive in a fixed order):

# Approach for more loosely formatted inputs
import re
pattern = '''(?x)
    Name:\s+(\w+)\s+
    Age:\s+(\d+)\s+
    Birthday:\s+(\d+)\s+
    SocialSecurity:\s+(\d+)
'''
print re.findall(pattern, inputData)

Other respondants have suggested the third-party PyParsing module which
provides a powerful general-purpose toolset for text parsing; however,
it is always worth mastering Python basics before moving on to special
purpose tools.  The above code fragements are easy to construct and not
hard to explain to others.  Maintenance is a breeze.


Raymond


P.S.  Once you've formed a list of tuples, it is trivial to create
Person objects for your pascal-like structure:

class Person(object):
    def __init__(self, (name, age, bd, ssn)):
        self.name=name; self.age=age; self.bd=bd; self.ssn=ssn

personlist = map(Person, result)
for p in personlist:
    print p.name, p.age, p.bd, p.ssn



From dan at wolf.com  Mon Feb  6 16:37:34 2006
From: dan at wolf.com (Dan M)
Date: Mon, 06 Feb 2006 13:37:34 -0800
Subject: Code Feedback
References: <1139247238.520281.144670@f14g2000cwb.googlegroups.com>
Message-ID: <pan.2006.02.06.21.37.32.698385@wolf.com>

> 2) Anybody know how to alter the "while 1: pass" section to make the
> app stoppable?

That one I think I can help with! See below.

>     while 1: pass

      try:
	  while 1:
		pass
      except KeyboardInterrupt:
	  break




From bonono at gmail.com  Mon Feb 20 06:17:05 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 20 Feb 2006 03:17:05 -0800
Subject: Quesion about the proper use of __slots__
In-Reply-To: <1140432487.272405.297100@f14g2000cwb.googlegroups.com>
References: <1140424508.393412.79140@o13g2000cwo.googlegroups.com>
	<43f9825e$0$4777$636a55ce@news.free.fr>
	<1140426860.033363.237150@o13g2000cwo.googlegroups.com>
	<dtc219$h0a$01$1@news.t-online.com>
	<1140428016.170547.315710@g47g2000cwa.googlegroups.com>
	<1140432487.272405.297100@f14g2000cwb.googlegroups.com>
Message-ID: <1140434225.164304.230440@z14g2000cwz.googlegroups.com>


Zefria wrote:
> Well, my computer tends to run at about 497 to 501 out of 504 MB of RAM
> used once I start up Gnome, XMMS, and a few Firefox tabs, and I'd
> prefer not to see things slipping into Swap space if I can avoid it,
> and the fighter data would be only part of a larger program.
>
> And as I said, learning how to use __slots__ is important enough to
> hazard a premature guess this time around. If I mess up, the worst that
> happens is that I have to write down a new variable name in two places
> instead of one now.

For this particular setup, I don't think it would be a concern given
your mentioned size as you are very unlikely to be actively using all
the apps at the same time and linux is quite efficient in handling it.

However, I don't think attempting to use __slots__ in this case is bad
either. Afterall, one of the strength of python is allowing you to
quickly test out different approachs.



From grflanagan at yahoo.co.uk  Sun Feb 26 17:15:22 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 26 Feb 2006 14:15:22 -0800
Subject: TypeError when subclassing 'list'
Message-ID: <1140992122.723907.263990@z34g2000cwc.googlegroups.com>

Hello all

Could anyone shed any light on the following Exception? The code which
caused it is below.  Uncommenting the 'super' call in 'XmlNode' gives
the same error. If I make XmlNode a subclass of 'object' rather than
'list' then the code will run.

Thanks in advance.

Exception:

Traceback (most recent call last):
  File "C:\Program
Files\Python\Python24\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py",
line 310, in RunScript
    exec codeObject in __main__.__dict__
  File "C:\Documents and Settings\Gerard\My
Documents\Scripts\Python\XmlNode\XmlNode.py", line 5, in ?
    class XmlNode(list):
TypeError: Error when calling the metaclass bases
    __init__() takes at most 2 arguments (4 given)

Code:

from elementtree.SimpleXMLWriter import XMLWriter

class XmlNode(list):
    tag = None
    attrib = None
    value = None
    def __init__(self, tag, **attrib):
        #super(list, self).__init__()
        self.tag = tag
        self.attrib = attrib

    def __repr__(self):
        return "<XmlNode %s at %x>" % (self.tag, id(self))

    def write(self, writer):
        writer.start(self.tag, self.attrib)
        if self.value is not None:
            writer.data(self.value)
##        for node in self:
##            node.write(writer)
        writer.end()

class HtmlElement(XmlNode):
    def __init__(self, tag, value='', **attrib):
        super(HtmlElement, self).__init__(tag=tag, **attrib)
        self.value = value

class li(HtmlElement):
    def __init__(self, value=None, **attrib):
        super(li, self).__init__(tag='li', **attrib)

class ul(HtmlElement):
    def __init__(self, **attrib):
        super(ul, self).__init__(tag='ul', **attrib)

if __name__ == '__main__':
    from StringIO import StringIO

    item = li('item')
    items = ul()
    #items.apppend(item)
    out = StringIO()
    writer = XMLWriter(out)
    items.write(writer)
    print
    print out.getvalue()
    out.close()



From n.estner at gmx.de  Fri Feb  3 07:14:33 2006
From: n.estner at gmx.de (n.estner at gmx.de)
Date: 3 Feb 2006 04:14:33 -0800
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<donn-C3B8DF.14535302022006@gnus01.u.washington.edu>
	<1138926741.052843.169270@z14g2000cwz.googlegroups.com>
	<donn-AC8404.17325802022006@gnus01.u.washington.edu>
	<1138965780.698016.95590@o13g2000cwo.googlegroups.com>
	<pan.2006.02.03.11.57.35.210525@REMOVETHIScyber.com.au>
Message-ID: <1138968873.280730.130210@g47g2000cwa.googlegroups.com>

> You could try running it to see:
>
> >>> class A:
>
> ...     def test(a, **kwargs): return 1
> ...
> >>> class B:
>
> ...     def test(b, **kwargs): return 2
> ...
> >>> test(a=A(), b=B())
>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> NameError: name 'test' is not defined
>
> Oops! You have defined a name "test" in two namespaces, the class A and
> the class B, but there is no name "test" in the global namespace you are
> trying to run it in.
>
> Since namespaces are critical to Python, your test code is a problem that
> just cannot happen in Python. It is a non-issue. Python will not get
> confused between the two definitions of test.

I've been answering to Donn Cave's suggestion. Read it, and you will
understand what I mean.

> As near as I can tell, your original complaint might be solved simply: it
> seems to me that you are concerned about that extraneous "self" parameter
> for methods that don't need it:

No, I wasn't talking about functions that don't use the "self"
parameter. I rarely ever have such functions. I just tried to make the
example as short as possible.



From waldemar.osuch at gmail.com  Mon Feb 27 00:25:19 2006
From: waldemar.osuch at gmail.com (Waldemar Osuch)
Date: 26 Feb 2006 21:25:19 -0800
Subject: how to write file with cp1250 encodings?
References: <1naixxfnequd.pr3wbg48tvap$.dlg@40tude.net>
Message-ID: <1141017919.442713.259870@p10g2000cwp.googlegroups.com>

Grzegorz Smith wrote:
> Hi all. I have got situation: i load data from database(MSSQL) wchich are
> encoded cp1250 and I fill template with that data (Cheetah Template), after
> all i want to save template to file on disk. I'm using

One way to do it:

>>> from Cheetah.Template import Template
>>> print open('city.tmpl').read()
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
  <meta content="text/html; charset=cp1250" http-equiv="content-type">
  <title>Welcome</title>
</head>
<body>
Welcome to $city
<br>
</body>
</html>

>>> t = Template(file='city.tmpl')
>>> city = u'L?dz'
>>> t.city = city.encode('cp1250')
>>> open('city.html', 'w').write(str(t))

The idea here is to encode your unicode before passing it to the
template.

Waldemar



From grante at visi.com  Fri Feb 10 22:40:21 2006
From: grante at visi.com (Grant Edwards)
Date: Sat, 11 Feb 2006 03:40:21 -0000
Subject: Socket Programming - Question
References: <1139616664.208516.254900@f14g2000cwb.googlegroups.com>
	<11uqefs4f3gq617@corp.supernews.com>
	<1139625698.583778.167140@f14g2000cwb.googlegroups.com>
Message-ID: <11uqn556ue1v8e7@corp.supernews.com>

On 2006-02-11, D <duncanm255 at hotmail.com> wrote:

> I've used os.popen() before, but if I execute it on a remote
> system how could I get the output back to the requesting
> machine?

Write it to the socket?

-- 
Grant Edwards                   grante             Yow!  Where does it go when
                                  at               you flush?
                               visi.com            


From sybrenUSE at YOURthirdtower.com.imagination  Thu Feb  9 13:34:41 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Thu, 9 Feb 2006 19:34:41 +0100
Subject: CLI
References: <1139507308.888959.320480@f14g2000cwb.googlegroups.com>
Message-ID: <slrndun2qd.og7.sybrenUSE@schuimige.unrealtower.org>

mwt enlightened us with:
> I want to do programmatic terminal commands on unix with python

If you want to use a real terminal, search for pty. If you just want
to start and stop scripts, check the popen2 module.


Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From uval at rz.uni-karlsruhe.de  Fri Feb 10 21:31:10 2006
From: uval at rz.uni-karlsruhe.de (=?ISO-8859-1?Q?Sch=FCle_Daniel?=)
Date: Sat, 11 Feb 2006 03:31:10 +0100
Subject: arrays in python
In-Reply-To: <mailman.1727.1139613159.27775.python-list@python.org>
References: <mailman.1727.1139613159.27775.python-list@python.org>
Message-ID: <dsj85j$o10$1@news2.rz.uni-karlsruhe.de>

> I want to write a program in python using integer arrays.

you can :)


> I wish to calculate formulas using 200 digit integers.

no problem

> I could not find any documentation in python manual about declaring arrays.
>  
> I searched the internet

read here
http://diveintopython.org/native_data_types/lists.html

maybe list are what you are looking for

> and found an example that said I must declare
>  
> from Numeric import *

yes, one can use Numeric for this taks too

> and I downloaded a numerical python  extension,
>  
> but still  have not found a way to declare an array of given length.
>  
> The zeros function always gives me an error message.

 >>> import Numeric as N, random as rand
 >>> nums = [33 ** rand.randint(10,100) for i in range(200)]
 >>> len(nums)
200
 >>> nums[0]
1666465812864030391541732975677083441749008906546726522024522041932256405404932170047036994592860856233379702595619607481259213235163454890913L
 >>>
 >>> a = N.array(nums)
 >>> len(a)
200
 >>> a[0]
1666465812864030391541732975677083441749008906546726522024522041932256405404932170047036994592860856233379702595619607481259213235163454890913L
 >>>


by the way, you know you can use interactive Python iterpreter
and there is dir and help function

 >>> dir(a)
['__copy__', '__deepcopy__', 'astype', 'byteswapped', 'copy', 
'iscontiguous', 'itemsize', 'resize', 'savespace', 'spacesaver', 
'tolist', 'toscalar', 'tostring', 'typecode']
 >>> dir(nums)
['__add__', '__class__', '__contains__', '__delattr__', '__delitem__', 
'__delslice__', '__doc__', '__eq__', '__ge__', '__getattribute__', 
'__getitem__', '__getslice__', '__gt__', '__hash__', '__iadd__', 
'__imul__', '__init__', '__iter__', '__le__', '__len__', '__lt__', 
'__mul__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', 
'__repr__', '__reversed__', '__rmul__', '__setattr__', '__setitem__', 
'__setslice__', '__str__', 'append', 'count', 'extend', 'index', 
'insert', 'pop', 'remove', 'reverse', 'sort']
 >>>

Regards, Daniel



From cito at online.de  Tue Feb 14 07:29:43 2006
From: cito at online.de (Christoph Zwerschke)
Date: Tue, 14 Feb 2006 13:29:43 +0100
Subject: how do you pronounce 'tuple'?
In-Reply-To: <1139816300.706181.79250@f14g2000cwb.googlegroups.com>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<11v032ii4gvik72@corp.supernews.com>
	<1139816300.706181.79250@f14g2000cwb.googlegroups.com>
Message-ID: <dssifk$8r3$2@online.de>

nnorwitz at gmail.com schrieb:
> Then we went to hear Guido speak about Python 2.2 at a ZPUG meeting in
> Washington, DC.  When he said toople I almost fell out of my chair
> laughing, particularly because the people who taught me to say it the
> "right" way were with me.  When I looked over, they just hung their
> head in shame.

"Although that way may not be obvious at first unless you're Dutch." ;-)

(or German) -- Christoph


From lists at stringsutils.com  Sat Feb 25 12:50:11 2006
From: lists at stringsutils.com (Francisco Reyes)
Date: Sat, 25 Feb 2006 12:50:11 -0500
Subject: A bit off topic, but good web hosting for PostgreSQL/Python?
References: <1140875695.053987.158710@t39g2000cwt.googlegroups.com>
Message-ID: <cone.1140889811.930498.40672.5001@35st-server.simplicato.com>

dananrg at yahoo.com writes:

> Seems like most web hosting providers support MySQL, but not
> PostgreSQL.

There are actually many.

Two that I personally have experience with:
http://hub.org
http://bizintegrators.com

They both support PostgreSQL.

Not sure on their python support, but I believe they likely already have it
or would do mod_python for you.

> Couldn't find a good PostgreSQL newsgroup so I thought I'd ask here.

The postgresql mailing lists are both active and very helpfull. Just check
the postgresql site for mailing list subscription info.


From paschott at no.yahoo.spamm.com  Wed Feb 22 17:07:52 2006
From: paschott at no.yahoo.spamm.com (Peter A. Schott)
Date: Wed, 22 Feb 2006 22:07:52 GMT
Subject: listdir() - any way to limit # of file entries?
Message-ID: <bunpv1pafuserji1bjft3146c7833h1pu9@4ax.com>

I want to build a program that does some archiving.  We have several programs
that have been dumping files into a folder (one folder) for some time now.  I
want to limit the number of files returned by listdir to avoid trying to build a
list with tons of entries.  I then want to move those files into a zip archive
for the appropriate day/month.

Is there any way to build a list of the first 1000 files or so in a folder?

Running Python 2.4.2 on Win32 with Win32 extensions.

Thanks.

-Pete Schott


From lycka at carmen.se  Fri Feb 24 05:31:46 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 24 Feb 2006 11:31:46 +0100
Subject: PYTHONPATH?
In-Reply-To: <JAsLf.257$6I.183@newsread3.news.pas.earthlink.net>
References: <JAsLf.257$6I.183@newsread3.news.pas.earthlink.net>
Message-ID: <dtmnai$hkn$1@wake.carmen.se>

Dr. Pastor wrote:
> Several Documents about Python refer to PYTHONPATH.

If you need to import libraries into Python, that don't reside in the
standard locations in your Python installation, you need to define
a PYTHONPATH environment variable in the operating system, which
points out this directory.

Defining this is done in the same way as defining PATH etc.

> I could not find such variable.

Do you need it for anything?

> (Python 2.4.2, IDLE 1.1.2, Windows XP)
> How should/could I nominate a Directory to be the local Directory?

import os
os.chdir('c:/somedir')

Another way is to start python from there, e.g. from the
command prompt (nothing beats a command prompt!) you would do:

cd some\local\directory
python myscript.py (... or just python ...)

Note that backslash in a Python string literal denotes an escape
sequence. In Python 'c:\temp' means 'c' ':' tab 'e' 'm' 'p', since
'\t' is the escape sequence for a tab. You can use 'c:/temp' (ok
for  Windows APIs) r'c:\temp' (r for raw string, i.e. don't use
escape sequences) or 'c:\\temp' (\\ is the escape sequence for
backslash).

Also note, that the way to use libraries from an arbitrary
directory without setting PYTHONPATH, is not with os.chdir,
but by doing this:

import sys
sys.path.append('c:/somedir')


From aurelien.campeas at free.fr  Tue Feb  7 05:29:09 2006
From: aurelien.campeas at free.fr (aurelien.campeas at free.fr)
Date: 7 Feb 2006 02:29:09 -0800
Subject: how to copy a Python object
In-Reply-To: <1139301392.205225.48690@o13g2000cwo.googlegroups.com>
References: <1139301392.205225.48690@o13g2000cwo.googlegroups.com>
Message-ID: <1139308149.557027.77160@z14g2000cwz.googlegroups.com>


mitsura at skynet.be a ?crit :

> Hi,
>
> I am new to Python and OO programming.
> I need to copy a Python object (of a class I made myself).
> new_obj = old_object doesn't seem to work since apparently new_obj is
> then a referrence to old_obj.

it is

>
> I found out that there is a module called 'copy' that allows you to do
> a shallow or a deep copy.
> I need a deep copy since my object contains dicts to other objects that
> also need to be copied.

yes but ...

>
> However, when I do new_object = copy.deepcopy(old_object) I get a
> series of errors. The most important one:
> "
> TypeError: object.__new__(PySwigObject) is not safe, use
> PySwigObject.__new__()
> "

you see ?
that illustrates there is no general solution to the deep copy problem

>
> So any help much appreciated.

just provide your own copy() operator on your class
you and only you can know how deep you want to copy things (it just
depends on the nature of said things)

> 
> With kind regards,
> 
> Kris
> 
> I am using Python 2.4



From jess.austin at gmail.com  Thu Feb 16 20:34:18 2006
From: jess.austin at gmail.com (jess.austin at gmail.com)
Date: 16 Feb 2006 17:34:18 -0800
Subject: Pulling all n-sized combinations from a list
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>
Message-ID: <1140140058.313161.174600@f14g2000cwb.googlegroups.com>

hi,

I'm not sure why this hasn't come up yet, but this seems to beg for
list comprehensions, if not generator expressions.  All of the
following run in under 2 seconds on my old laptop:

>>> alph = 'abcdefghijklmnopqrstuvwxyz'
>>> len([''.join((a,b,c,d)) for a in alph for b in alph for c in alph for d in alph])
456976
>>> len([''.join((a,b,c,d)) for a in alph for b in alph for c in alph for d in alph
...      if (a>=b and b>=c and c>=d)])
23751
>>> len([''.join((a,b,c,d)) for a in alph for b in alph for c in alph for d in alph
...      if (a!=b and b!=c and c!=d and d!=a and b!=d and a!=c)])
358800
>>> len([''.join((a,b,c,d)) for a in alph for b in alph for c in alph for d in alph
...      if (a>b and b>c and c>d)])
14950

cheers,
Jess



From Ido.Yehieli at gmail.com  Thu Feb 16 07:10:09 2006
From: Ido.Yehieli at gmail.com (Ido Yehieli)
Date: 16 Feb 2006 04:10:09 -0800
Subject: apache mod_python problem
In-Reply-To: <1140090773.633768.67850@g47g2000cwa.googlegroups.com>
References: <1140042611.557816.247140@g14g2000cwa.googlegroups.com>
	<43f3b460$1@news.uni-ulm.de>
	<1140046112.527015.144420@g14g2000cwa.googlegroups.com>
	<1140052489.456343.143050@o13g2000cwo.googlegroups.com>
	<1140090773.633768.67850@g47g2000cwa.googlegroups.com>
Message-ID: <1140091809.713809.318520@g44g2000cwa.googlegroups.com>

please ignore that last message, the instructions on that webpage
worked, it was my fault.

Thanks,
Ido.



From steve at holdenweb.com  Sun Feb 12 23:15:53 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 12 Feb 2006 23:15:53 -0500
Subject: ordered sets operations on lists..
In-Reply-To: <1hana3d.1bwbt4c1esela5N%aleaxit@yahoo.com>
References: <mailman.1722.1139590689.27775.python-list@python.org>	<1139592166.993686.212000@f14g2000cwb.googlegroups.com>	<1139599834.975607.77180@f14g2000cwb.googlegroups.com>	<1halbdx.dd0p1l1obawfkN%aleaxit@yahoo.com>	<43ef8e5f.625119424@news.oz.net>
	<1hana3d.1bwbt4c1esela5N%aleaxit@yahoo.com>
Message-ID: <43F007F9.3090103@holdenweb.com>

Alex Martelli wrote:
> Bengt Richter <bokr at oz.net> wrote:
>    ...
> 
>>>Personally, I'd always use (depending on guesses regarding lengths of
>>>lists) [x for x in l1 if x in l2] or the setified equivalent, of course.
>>>
>>
>>Perhaps newbies should be advised that
>>
>>    [x for x in l1 if x in set(l2)]
>>
>>is not a (well) setified equivalent? I could see them being tempted.
> 
> 
> You mean, newbies should be advised that Python does NOT hoist any
> computations whatsoever from the body of a loop (including LCs and
> genexps), so if you want anything hoisted you need to hoist it yourself?
> Yes, it is a point worth making, since the lack of hoisting is a
> frequent cause of performance loss.
> 
Of course now 2.5 is planning to include the AST parser there's fruitful 
ground for optimization studies that will perform hoisting automatically 
(should anyone be looking for a project ;-)

Given that Python 2.4 doesn't even perform simple constant folding for 
arithmetic expressions

  >>> dis.dis(compile("print 1+2", '', 'exec'))
   1           0 LOAD_CONST               0 (1)
               3 LOAD_CONST               1 (2)
               6 BINARY_ADD
               7 PRINT_ITEM
               8 PRINT_NEWLINE
               9 LOAD_CONST               2 (None)
              12 RETURN_VALUE

even hoisting could be seen as an "advanced" optimization.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From fakeaddress at nowhere.org  Mon Feb  6 13:39:39 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Mon, 06 Feb 2006 18:39:39 GMT
Subject: Thread imbalance
In-Reply-To: <mailman.1427.1139097680.27775.python-list@python.org>
References: <1138912272.382474.13170@g44g2000cwa.googlegroups.com>	<ds3d35$mo6$2@bagan.srce.hr>
	<mailman.1427.1139097680.27775.python-list@python.org>
Message-ID: <LJMFf.52291$PL5.39401@newssvr11.news.prodigy.com>

Peter Hansen wrote:
> Ivan Voras wrote:
>> Python is bad for concurrently executing/computing threads, but it 
>> shouldn't be that bad - do you have lots of compute-intensive threads?
> 
> Just in case anyone coming along in the future reads this statement, for 
> the record I'd like to say this is obviously a matter of opinion or 
> interpretation, since in my view Python is *excellent* for threads

Ivan already gave his answer: the GIL. The GIL is no real problem
on single processors. As commodity machines go to
multi-poly-hyper-cell-core, or whatever they call it, the GIL is
becoming much less attractive.

There are other issues of note:

As the OP's problem points out, Python threads don't offer any
priority control.

Timeouts on the threading module's Condition objects are
implemented by active polling. Timeouts in threading.Event and
Queue.Queue are implemented via threading.Condition so they
inherit the polling implementation.

A thread can wait on just one
Lock/RLock/Condition/Semaphore/Event/Timer at a time. There is no
analog of Win32's WaitMultipleObjects(). As an example, suppose
we wanted to implement timeouts without polling by waiting for
either a Semaphore or a timer. With Python's standard thread and
threading libraries, there's no good way to do so.


-- 
--Bryan


From luismgz at gmail.com  Tue Feb 14 09:49:26 2006
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 14 Feb 2006 06:49:26 -0800
Subject: Python / Apache / MySQL
In-Reply-To: <1139907519.427789.188760@g14g2000cwa.googlegroups.com>
References: <1139907519.427789.188760@g14g2000cwa.googlegroups.com>
Message-ID: <1139928566.478309.227800@g14g2000cwa.googlegroups.com>

Just a few comments...

Database:
As with anything else, try to keep it simple until you need to make it
complex.
Sqlite is the simplier alternative, and it's also the fastest for the
intended use (small number of users, simple selects, etc). MySQL is
also a very good alternative and much more powerful.

Mod_python:
Mod_python is the best choice (AFAIK, please correct me if I'm wrong)
if you want speed, performance and scalability. Many frameworks are
based on mod_python (Django, for example), so you can't go wrong with
it.
But let me tell you that if you just want to use bare-bones mod_python,
without any framework on top of it, you can do it, and it's not
difficult at all.
Mod_python comes with its own implementation of PSP (python server
pages), which lets you program a la PHP (intermingling python and
html).
If you want, you can also separate logic and presentation by using its
"publisher handle" along with PSP templates. If you prefer other kinds
of templetaing system, you can use them too (for example Cheetah).

For a long time I steered away of mod_python because I had the
impression it was too difficult and not user friendly enough, what once
I tried and followed the examples in the documentation, I found it to
be a very good alternative.
And the community on its mailing list is very kind and supportive. They
reply any question in a matter of minutes.



From steve at REMOVEMEcyber.com.au  Mon Feb  6 20:19:23 2006
From: steve at REMOVEMEcyber.com.au (Steven D'Aprano)
Date: Tue, 07 Feb 2006 12:19:23 +1100
Subject: Question about idioms for clearing a list
References: <mailman.1294.1138727665.27775.python-list@python.org>	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>	<mailman.1489.1139232969.27775.python-list@python.org><pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au>	<ds83kd$98m$1@sea.gmane.org>
	<mailman.1510.1139250471.27775.python-list@python.org>
Message-ID: <43E7F59B.9070009@REMOVEMEcyber.com.au>

Fredrik Lundh wrote:

> Peter Hansen wrote:
> 
> 
>>>Perhaps it is arguable that there is no need for a clear method because
>>>L[:] = [] is so easy to do. Personally, while I agree that it is easy, it
>>>is hardly intuitive or obvious, and I too would prefer an explicit clear
>>>method for mutable sequences.
>>
>>Possibly another case where "patches are welcome"...
> 
> 
> so we can have three ways to do the same thing?  the right way to
> nuke a sequence is to do "del L[:]".  this is explained in Python 101.

The Zen isn't "only one way to do it". If it were, we 
wouldn't need iterators, list comps or for loops, 
because they can all be handled with a while loop (at 
various costs of efficiency, clarity or obviousness).

del L[:] works, but unless you are Dutch, it fails the 
obviousness test. It also fails the introspection test: 
neither dir(list) nor help(list) make it easy to 
discover how to empty a list. In my opinion, the 
primary advantage for a clear() method would be that it 
is self-documenting.



-- 
Steven.



From cam.ac.uk at mh391.invalid  Sat Feb 25 13:48:37 2006
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sat, 25 Feb 2006 18:48:37 +0000
Subject: python-list/python-dev quoting style
In-Reply-To: <1200u9m81c2tdc9@corp.supernews.com>
References: <dtml9t$367$1@gemini.csx.cam.ac.uk> <dtnjdt$n9q$1@panix2.panix.com>
	<dto7um$ils$1@gemini.csx.cam.ac.uk> <dtoti4$nmj$1@panix3.panix.com>
	<dtouti$327$1@gemini.csx.cam.ac.uk>
	<1200ktdnodqqr26@corp.supernews.com>
	<dtpo4l$jml$1@gemini.csx.cam.ac.uk>
	<mailman.2432.1140879887.27775.python-list@python.org>
	<1200u9m81c2tdc9@corp.supernews.com>
Message-ID: <dtq8q8$n0n$1@gemini.csx.cam.ac.uk>

Grant Edwards wrote:
> On 2006-02-25, Steve Holden <steve at holdenweb.com> wrote:
>>>[me]
>>>>>It's hard to believe that you don't understand who "me" is in
>>>>>a conversation between two people,

[me]
>>>Is there really confusion about who "me" is? I find that
>>>mystifying.

[Grant Edwards]
> And now none of us have any way to know who the [me] above is.

I see.
-- 
me


From johnpote at blueyonder.co.uk  Thu Feb  9 07:08:43 2006
From: johnpote at blueyonder.co.uk (John Pote)
Date: Thu, 09 Feb 2006 12:08:43 GMT
Subject: Hi reliability files, writing,reading,maintaining
Message-ID: <fhGGf.274074$vl2.129103@fe2.news.blueyonder.co.uk>

Hello, help/advice appreciated.

Background:
I am writing some web scripts in python to receive small amounts of data
from remote sensors and store the data in a file. 50 to 100 bytes every 5 or
10 minutes. A new file for each day is anticipated.  Of considerable
importance is the long term availability of this data and it's gathering and
storage without gaps.

As the remote sensors have little on board storage it is important that a
web server is available to receive the data. To that end two separately
located servers will be running at all times and updating each other as new
data arrives.

I also assume each server will maintain two copies of the current data file,
only one of which would be open at any one time, and some means of
indicating if a file write has failed and which file contains valid data.
The latter is not so important as the data itself will indicate both its
completeness (missing samples) and its newness because of a time stamp with
each sample.
I would wish to secure this data gathering against crashes of the OS,
hardware failures and power outages.

So my request:
1. Are there any python modules 'out there' that might help in securely
writing such files.
2. Can anyone suggest a book or two on this kind of file management. (These
kind of problems must have been solved in the financial world many times).

Many thanks,

John Pote








From andrewfelch at gmail.com  Tue Feb  7 16:15:17 2006
From: andrewfelch at gmail.com (andrewfelch at gmail.com)
Date: 7 Feb 2006 13:15:17 -0800
Subject: Easy way to make Numarray Bool use 1 bit?
Message-ID: <1139346917.187413.96850@z14g2000cwz.googlegroups.com>

I need to be able to store thousands of one-million-length bit arrays.
The first operations use the & operator.  But eventually I must perform
an inner product with a one-million-length integer array (summing at
all the indices of the integer operand where the boolean operand has a
"1").

If I use the Boolean type, I end up using 1-byte, per needed bit, which
is not efficient enough (only 1,000 arrays per gigabyte of memory).
I'm limited by 32-bit windows to use only 2 GB total.

Anybody know of a fast way to use only 125 kilobytes of memory per
array and yet be able to inner product with an integer array quickly?
Don't tell me I have to write C/C++ ! (ugh!)

TIA,
AndrewF



From no at spam.com  Tue Feb 14 09:06:54 2006
From: no at spam.com (DH)
Date: Tue, 14 Feb 2006 08:06:54 -0600
Subject: Pythonic gui format?
In-Reply-To: <1139923105.939191.200660@z14g2000cwz.googlegroups.com>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<43f11990$0$667$626a54ce@news.free.fr>
	<1139923105.939191.200660@z14g2000cwz.googlegroups.com>
Message-ID: <HrKdnTPaI9adeWzeRVn-pg@comcast.com>

Gregory Petrosyan wrote:
> Thanks for JSON. It's more clean&simple than XML, but my main idea is
> to remove any extra layer between Python and GUI. I want all GUI
> elements/data to be directly accessible from Python (without extra
> libraries).

Since JSON is just python dicts and lists, you don't need an extra 
library to use it, essentially.


> Your dicts example is nice, but this  approach (and some others) lacks
> one important feature: ordering of GUI elements. In XML, the order of
> all elements is specified, and with dicts (or with very clean Georg's
> model) it is not. (BTW remember topics about ordered dicts...)

That's a good point.


From klachemin at comcast.net  Fri Feb 10 20:00:41 2006
From: klachemin at comcast.net (Kamilche)
Date: 10 Feb 2006 17:00:41 -0800
Subject: Legality of using Fonts
In-Reply-To: <pan.2006.02.10.23.30.05.619934@REMOVETHIScyber.com.au>
References: <1139591308.864757.154740@g44g2000cwa.googlegroups.com>
	<pan.2006.02.10.23.30.05.619934@REMOVETHIScyber.com.au>
Message-ID: <1139619641.908053.112010@f14g2000cwb.googlegroups.com>

Yeah, that's what I'm thinking, as well. Showing all the text on an
image is one thing... using that image as the basis of a font engine is
something different.

Luckily, someone has sent me a link to a set of free TrueType fonts -
http://www.gnome.org/fonts , the 'Vera' family. I guess I'll turn those
into bitmaps to stay out of the gray area.

I have other reasons I want to use a bitmap font, other than licensing
issues.



From steve at REMOVETHIScyber.com.au  Sun Feb 12 10:24:40 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Mon, 13 Feb 2006 02:24:40 +1100
Subject: Tracking down memory leaks?
References: <1139749861.949765.282310@z14g2000cwz.googlegroups.com>
	<1139752915.618372.325450@o13g2000cwo.googlegroups.com>
Message-ID: <pan.2006.02.12.15.24.39.863752@REMOVETHIScyber.com.au>

On Sun, 12 Feb 2006 06:01:55 -0800, dmsbox2000-list1 at yahoo.com wrote:

> I *think* Python uses reference counting for garbage collection.

Yes it does, with special code for detecting and collecting circular
references.

> I've
> heard talk of people wanting to change this (to mark and sweep?).

Reference counting is too simple to be cool *wink*

[snip]
> Make sure you are not creating
> a circular reference.  Something like this:
> 
> a = [1, 2, 3, 4, 5, 6]
> b = ['a', 'b', 'c', 'd']
> c = [10, 20, 30, 40]
> 
> a[3] = b
> b[1] = c
> c[0] = a
> 
> the last assignment creates a circular refence, and until it is removed,
> non of these objects will be removed from memory.

I believe Python now handles this sort of situation very well now.


> I'm not an expert on python internals, and it is possible that they have
> a way of checking for cases like this.   I think the deepcopy method
> catches this, but I don't *think* basic garbage collection look for this
> sort of thing.

deepcopy has nothing to do with garbage collection.

This is where you use deepcopy:

py> a = [2, 4, [0, 1, 2], 8]  # note the nested list
py> b = a         # b and a both are bound to the same list
py> b is a        # b is the same list as a, not just a copy
True
py> c = a[:]      # make a shallow copy of a
py> c is a        # c is a copy of a, not a itself
False
py> c[2] is a[2]  # but both a and c include the same nested list
True

What if you want c to include a copy of the nested list? That's where you
use deepcopy:

py> d = copy.deepcopy(a)
py> d[2] is a[2]
False



-- 
Steven.



From wrongbad at gmail.com  Tue Feb 14 23:12:47 2006
From: wrongbad at gmail.com (I V)
Date: 14 Feb 2006 20:12:47 -0800
Subject: How to *Search* with google from inside my programme and get the
	search result?
In-Reply-To: <mailman.1933.1139969478.27775.python-list@python.org>
References: <mailman.1933.1139969478.27775.python-list@python.org>
Message-ID: <1139976767.616343.168380@f14g2000cwb.googlegroups.com>

Frank Potter wrote:
> Does google supply some webservice to programmers? I did see

Googling for "google api" gets you to:

http://www.google.com/apis/

It appears to be a SOAP API, which you can access with python, but I
think you'll need a third-party library. Googling for "python soap"
gets you:

http://www-128.ibm.com/developerworks/library/ws-pyth5/

which might be a place to start.



From lycka at carmen.se  Wed Feb  8 10:33:53 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 08 Feb 2006 16:33:53 +0100
Subject: Question about idioms for clearing a list
In-Reply-To: <mailman.1594.1139403378.27775.python-list@python.org>
References: <mailman.1294.1138727665.27775.python-list@python.org>	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>	<mailman.1489.1139232969.27775.python-list@python.org>	<ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>	<mailman.1537.1139297533.27775.python-list@python.org>	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>	<mailman.1546.1139320907.27775.python-list@python.org>	<dscdtr$ciu$1@wake.carmen.se>
	<mailman.1594.1139403378.27775.python-list@python.org>
Message-ID: <dsd311$qlp$1@wake.carmen.se>

A slim lady in a brown overcoat appears and says with a silly
French accent: "Lizten very carefully, I vill zay ziz only onze."

BTW, I happen to reply to Ed's post now, but I'm really responding
to a fairly common attitude which I find somewhat counterproductive.
I hope people are openminded and able to see the point I'm trying
to make.

Ed Singleton wrote:
> The point is that having to use del to clear a list appears to the
> inexperienced as being an odd shaped brick when they've already used
> the .clear() brick in other places.

Agreed. The smart way to go from this stage of surprise is
not to assume that Python is broken, but to try to understand
how lists are different from e.g. dicts, and why the so-much-
smarter-than-me Python designers made it like this. Hubris is
considered a virtue in the Perl community. While not mentioned
so much, I'd say that humility is considered a virtue here.

Not that Python is perfect, but when you don't get a
"sorry, this change would break existing code, won't happen
until Python 3.0"-resonse, but a "study this more"-response,
the smart thing is to open your mind and try to fully grok
this.

There is a very strong ambition among the Python developers
to avoid duplication of features. This is one of the keys to
Python's ease of use and readability. Don't bother suggesting
synonyms. While there are thousands of situations where adding
just another method would make life easier in the short run,
life would be much harder if there were thousands of extra
methods in the Python core!

It isn't always possible to use one approch to a problem in all
cases. If two approaches are used, they don't usually overlap.
The "extra" approach is only used where the normal approach
doesn't work.

> Having bricks that work in lots of places makes the language
> 'guessable'.  "I've never cleared a list before, but I've cleared
> dictionaries and I guess the same way would work here".

I think we both agree that Python is very useful in this regard.
It's more consistent than other languages I've worked with, and
when things seems inconsistent, that's probably deliberate, and
the appearent lack of consistency is a hint that we need to grok
how these cases are different.

You really happen to arrive at this from the wrong direction. :)
The .clear() methods in dicts and sets are there because there
is no other convenient way to empty these containers. There is
no support in these kinds of containers to refer to the whole
contents without copying. There is no <something> which lets
you do "del aDict[<something>]" to clean a dict. You can do
"for key in aDict: del aDict[key]", but since this is a fairly
common thing to do, there is a shortcut for that called .clear().
I'm pretty sure the reason to implement it was speed rather than
convenience. As you know, "There should be one-- and preferably
only one --obvious way to do it." "Although practicality beats
purity." In other words, moving a very common loop from Python
to C was more important than a minimal interface. Don't forget
to "import this" and ponder a bit...

Statements and operators are really fundamental in Python. We
don't support n = 1.add(2), since we have the '+' operator.
You can't do x.clear() to remove arbitrary variables x from a
namespace, but del x works for every x, whether it's a dict,
a module or an int etc. Python basically just use methods when
the statements and operators aren't enough.

To really understand more about this, it might be useful to
ask why we can't use del to somehow empty dicts instead. In
the best case, that might possibly lead to the removal or at
least deprecation of the .clear() method in Python 3.0, but I
doubt that people would find some way that had the required
beauty.

> The problem is you have to be very careful when talking about this,
> not to use the C-word, because that's the hobgoblin of little minds,
> whereas in almost every other field it is considered an important part
> of usability.

That hobgoblin-phrase isn't very helpful. First of all, not all
who respond to questions at comp.lang.python know what they are
talking about. This is the internet. Take everything you read with
a grain of salt. But another thing I've learnt in my years as a
consultant, is that when experienced people directly and strongly
reject an idea, they usually do that based on intuition and
experience, and even if they are arguing poorly for their case,
it's in your best interest to try to understand why they react
like they do, or you'll fall down in that tar pit they were trying
to warn you about. It's like being in a foreign country and meeting
someone who is waving his arms and shouting incomprehensibly to
you. Just because you don't understand what he's saying, you shouldn't
assume that he's just talking jibberish and can be safely ignored.

The smart approach is neither to stubbornly repeat your already
rejected idea, nor to try to crush the arguments of those who
oppose you, but rather to openly and humbly try your best to see
their side of this. Don't just accept it. Try to figure out why
these really bright people have taken this standpoint. They've
probably heard your question 20 times before, and might be bored
to go through all the arguments again.

(Part of this is to figure out who are the guys you should really
listen to. If people are allowed to commit code to the Python code
base, that's a hint that they know what they are talking about...
http://sourceforge.net/project/memberlist.php?group_id=5470
In other words, you cn safely ignore me... ;^)

I'm sure Python can and will be improved in various ways, and that
some people who are fairly new to Python might come up with bright
ideas. I also suspect that those old farts (like me) who have used
it for ages might respond in a stubborn and reactionary way. That
doesn't change the fact that the overwhelming amount of
comp.lang.python threads about flaws in Python and suggestions for
improvements in the core would make Python worse rather than better
if they were implemented.

I know that the last time (the one time) I claimed that Python had
a really bizarre bug, it turned out that I was just being blind and
sloppy.


From kent at kentsjohnson.com  Sun Feb 26 22:56:51 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Sun, 26 Feb 2006 22:56:51 -0500
Subject: ls files --> list packer
In-Reply-To: <1141012342.805500.308750@i39g2000cwa.googlegroups.com>
References: <1140765792.864556.289820@i40g2000cwc.googlegroups.com>
	<1140767111.490691.42460@e56g2000cwe.googlegroups.com>
	<dtml8u$1vh$1@gemini.csx.cam.ac.uk>
	<1141012342.805500.308750@i39g2000cwa.googlegroups.com>
Message-ID: <440273e8$1_1@newspeer2.tds.net>

kpp9c wrote:
> os.listdir works great ... just one problem, it packs the filenames
> only into a list... i need the full path and seach as i might i se NO
> documentation on python.org for os.listdir()

Docs for os.listdir() are here:
http://docs.python.org/lib/os-file-dir.html

When all else fails try the index:
http://docs.python.org/lib/genindex.html
> 
> how do i either grab the full path or append it later ...

Use os.path.join():

base = '/some/useful/path'
for f in os.listdir(base):
   full_path_to_file = os.path.join(base, f)

Kent


From duncan.booth at invalid.invalid  Thu Feb  9 03:45:42 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 9 Feb 2006 08:45:42 GMT
Subject: how to remove <BR> using replace function?
References: <1139462640.951603.302830@g44g2000cwa.googlegroups.com>
	<1139464079.635612.289930@o13g2000cwo.googlegroups.com>
	<1139465695.997171.159150@g44g2000cwa.googlegroups.com>
	<1139469846.713121.219060@g47g2000cwa.googlegroups.com>
	<1139472365.378523.141150@g44g2000cwa.googlegroups.com>
Message-ID: <Xns9765591BFA42Cduncanbooth@127.0.0.1>

Rinzwind wrote:

> Works for me.
> 
>>>> txt = "an unfortunate <br> in the middle"
>>>> print txt.replace("<br>", "")
> an unfortunate  in the middle
>>>> 
> 
> 
> Though I don't like the 2 spaces it gives ;)
> 
Although I generally advise against overuse of regular expressions, this is 
one situation where regular expressions might be useful: the situation is 
simple enough not to warrant a parser, but apart from the whitespace a <br> 
tag could have attributes or be written in xhtml style <br />. Also judging 
by the inconsistency between the OP's subject line and his original 
question he doesn't seem sure whether the tag is <br> or <BR> or even <Br>.

>>> import re
>>> nobr = re.compile('\W*<br.*?>\W*', re.I)
>>> nobr.sub(' ', "an unfortunate <br /> in the middle")
'an unfortunate in the middle'
>>> nobr.sub(' ', "an unfortunate <BR> in the middle")
'an unfortunate in the middle'


From steve at holdenweb.com  Sun Feb 12 20:10:39 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 12 Feb 2006 20:10:39 -0500
Subject: Questions for BitTorrent's Author, Bram Cohen
Message-ID: <dsomad$lea$1@sea.gmane.org>

Hi:

Bram Cohen will be a keynoter at this year's PyCon, and has asked that 
the presentation be in the form of an interview.

I'd like the questions to be representative of as broad a cross-section 
of the Python community as possible. If you have a question you'd like 
to hear Bram answer please let me know and I'll try to include them.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From dan at cellectivity.com  Thu Feb 16 10:16:29 2006
From: dan at cellectivity.com (Dan)
Date: Thu, 16 Feb 2006 15:16:29 +0000
Subject: Some general questions about using "stdin","stdout"....
In-Reply-To: <BAY12-F8EAB7B87DF62D425E9EC5E8FB0@phx.gbl>
References: <BAY12-F8EAB7B87DF62D425E9EC5E8FB0@phx.gbl>
Message-ID: <1140102989.15541.30.camel@localhost.localdomain>

Hello.

If you're new to Python, then input/output isn't the best place to
start. Begin with the tutorial:
  http://docs.python.org/tut/tut.html
Other documentation is also linked to from there.

However, I will briefly answer your questions.

>   print "hello"|sys.stdin.read()

In Python the | operator has a different meaning than in a shell. In
Python it means "bitwise or":

>>> print 5 | 9
13


> Why can't i "write" to the stdin?

There may be some contorted way to do that under Unix, but it's not a
good idea. You can pipe input to your program from a shell (as you've
already done), but it's not a good idea to redirect input from within
your program.

You can accomplish the same thing like this:

   if i_want_to_redirect_input:
      my_input_source = open('file.txt')
   else:
      my_input_source = sys.stdin
   # Now read from my_input_source instead of stdin.

-- 
  They had a big meeting, drank some beer and had some pizza and
  decided 'A' would be 65.
       - Jim Greenly, professor at Georgia Institute of Technology




From rtilley at vt.edu  Sat Feb 11 09:44:31 2006
From: rtilley at vt.edu (rtilley)
Date: Sat, 11 Feb 2006 14:44:31 +0000
Subject: python 2.5 and hashlib
Message-ID: <dslepr$bld$1@solaris.cc.vt.edu>

Is there a road map for python a 2.5 releases yet? I'd like to begin 
testing the new hashlib module with some old scripts I have that 
currently use the md5 and sha modules.

Thanks,
Brad


From python at rcn.com  Fri Feb 10 14:30:35 2006
From: python at rcn.com (Raymond Hettinger)
Date: 10 Feb 2006 11:30:35 -0800
Subject: ordered sets operations on lists..
References: <mailman.1722.1139590689.27775.python-list@python.org>
	<1139592166.993686.212000@f14g2000cwb.googlegroups.com>
Message-ID: <1139599834.975607.77180@f14g2000cwb.googlegroups.com>

[Amit Khemka]
> > Hello, Is there a *direct* way of doing set operations on lists which
> > preserve the order of the input lists ?
> > For Ex.  l1 = [1, 5, 3, 2, 4, 7]
> >             l2 =  [3, 5,  10]
> >
> > and (l1 intersect l2)  returns [5, 3]     .... (and (l2 intersect l1)

[bonono]
> what do you mean by "direct" way ? ugly(some said) one liner ?
>
> filter(set(l1).intersection(set(l2)).__contains__, l1)
> filter(set(l1).intersection(set(l2)).__contains__, l2)

The intersection step is unnecessary, so the answer can be simplified a
bit:

>>> filter(set(l2).__contains__, l1)
[5, 3]
>>> filter(set(l1).__contains__, l2)
[3, 5]



From felipe.lessa at gmail.com  Tue Feb 28 21:34:21 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Tue, 28 Feb 2006 23:34:21 -0300
Subject: PEP 354: Enumerations in Python
In-Reply-To: <7xd5h8jnk1.fsf@ruckus.brouhaha.com>
References: <87accdplbj.fsf@rose.polar.local>
	<1141019214.153904.115220@j33g2000cwa.googlegroups.com>
	<zIwMf.9924$PR2.201420@twister2.libero.it>
	<877j7gz53k.fsf@rose.polar.local> <7xd5h8jnk1.fsf@ruckus.brouhaha.com>
Message-ID: <1141180461.10021.44.camel@kenshin>

Em Seg, 2006-02-27 ?s 17:10 -0800, Paul Rubin escreveu:
> Ben Finney <bignose+hates-spam at benfinney.id.au> writes:
> > If an enumeration object were to be derived from, I would think it
> > just as likely to want to have *fewer* values in the derived
> > enumeration. Subclassing would not appear to offer a simple way to do
> > that.
> 
> pentium_instructions = enum('add', 'sub', 'mul', ) # etc
> 
> athlon64_instructions = enum('add64', 'sub64', # etc
>                              base_enum=pentium_instructions)
> 
> # 386 has no floating point unit
> i386_instructions = enum(base_enum=pentium_instructions,
>                          remove=('addf', 'subf', 'mulf',))  # etc

Or maybe just...

	i386_instructions = enum('add', 'sub', 'mul', ...)
	pentium_instructions = enum(i386_instructions, 'addf', 'subf',
'mulf', ...)
	athlon64_instructions = enum(pentium_instructions, 'add64',
'sub64', ...)
	myprocessor_instructions = enum('foo', 'bar', 'baz', ...)
	all_instructions = enum(athlon64_instructions,
myprocessor_instructions)

...and it could infer from the type that it's another enum to be
included. Also...

	(i386_instructions.add == pentium_instructions.add ==
athlon64_instructions.add == all_instructions.add) == True

...and so on.

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From stanc at al.com.au  Fri Feb 17 06:07:29 2006
From: stanc at al.com.au (Astan Chee)
Date: Fri, 17 Feb 2006 22:07:29 +1100
Subject: Terminating a function
Message-ID: <43F5AE71.8070502@al.com.au>

Hi,
Im rather new to threads in python but Im trying to terminate a function 
call (or the execution of the function) after a certain period of time 
has passed.
Do i need to use threads with this? if i do, how do i go about doing it?
Thanks


From vivainio at gmail.com  Thu Feb 16 17:07:36 2006
From: vivainio at gmail.com (vivainio at gmail.com)
Date: 16 Feb 2006 14:07:36 -0800
Subject: Evil, evil wxPython (and a glimmer of hope)
References: <1140116551.116322.12680@g43g2000cwa.googlegroups.com>
	<1140126748.067985.39760@g14g2000cwa.googlegroups.com>
Message-ID: <1140127656.883147.100440@g44g2000cwa.googlegroups.com>

snoe wrote:

> Take a look at dabo, II think they're doing exactly what you're
> describing.
> http://blog.dabodev.com/

Dabo appear to be doing way more than what I want, with database access
etc.

My ideal module, when implemented, would be extremely small as far as
the size of code goes. I'm using path.py as an example:

http://www.jorendorff.com/articles/python/path/path.py

   def dirs(self, pattern=None):
        """ D.dirs() -> List of this directory's subdirectories.
        """
        return [p for p in self.listdir(pattern) if p.isdir()]



From gry at ll.mit.edu  Mon Feb  6 13:14:28 2006
From: gry at ll.mit.edu (gry at ll.mit.edu)
Date: 6 Feb 2006 10:14:28 -0800
Subject: critique my code, please
References: <mailman.1488.1139232769.27775.python-list@python.org>
Message-ID: <1139249668.288363.290710@g43g2000cwa.googlegroups.com>

Just a few suggestions:

1) use consistant formatting, preferably something like:
  http://www.python.org/peps/pep-0008.html
  E.g.:
yesno = {0:"No", 1:"Yes", True:"Yes", False:"No"}

2) if (isinstance(self.random_seed,str)):
             s=s+"Random Seed: %s\n" % self.random_seed
         else:
             s=s+"Random Seed: %d\n" % self.random_seed
  is unnecessary, since %s handles any type.  Just say:
   s=s+"Random Seed: %s\n" % self.random_seed
  without any if statement.(unless you need fancy numeric formatting).

3) I would strongly discourage using print statements (other than for
debugging) in a GUI program.  In my experience, users fire up the GUI
and close (or kill!) the parent tty window, ignoring any dire messages
printed on stdout or stderr.  In a GUI app, errors, warnings, any
message
should be in popup dialogs or in a message bar in the main window.

4) If you want to be cute, you can use
  s += 'more text'
instead of
  s = s + 'more text'

I'm not a wx user so I can't comment on the GUI implementation.
Good luck!

-- George



From erniedude at gmail.com  Fri Feb  3 17:46:33 2006
From: erniedude at gmail.com (Ernesto)
Date: 3 Feb 2006 14:46:33 -0800
Subject: Launch Windows command window....
In-Reply-To: <1139006061.109731.187830@z14g2000cwz.googlegroups.com>
References: <1139003975.837861.141680@o13g2000cwo.googlegroups.com>
	<1139004370.221885.190540@f14g2000cwb.googlegroups.com>
	<1139005568.749960.261980@g44g2000cwa.googlegroups.com>
	<1139006061.109731.187830@z14g2000cwz.googlegroups.com>
Message-ID: <1139006793.684258.264730@g14g2000cwa.googlegroups.com>

wait a minute, that did work correctly.  Thanks !



From aleaxit at yahoo.com  Wed Feb  1 22:25:32 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Wed, 1 Feb 2006 19:25:32 -0800
Subject: nDimensional sparse histogram in python.
References: <1138848672.791908.90050@g44g2000cwa.googlegroups.com>
	<1ha3gff.u4comocxo4ddN%aleaxit@yahoo.com>
	<1138849589.663600.301610@z14g2000cwz.googlegroups.com>
Message-ID: <1ha3hrb.z9fahb1cxs03zN%aleaxit@yahoo.com>

KraftDiner <bobrien18 at yahoo.com> wrote:

> Cool.
> Ok so my histogram class had two methods 1) To increment a point and 2)
> to get the point.
> 
> def class histo:
>    def __init__(self):
>        histo = {}
> def update(point):
>    '''searches the dictionary for point and if it exists increment the
> value.
>     if it doesn't exist set the value to 1'''

def update(self, point):
  self.histo[point] = 1 + self.histo.get(point, 0)

> 
> def get(point):

def (self, point):

actually.

>    return self.histo[point]
> 
> I'm not sure how to code up the update routine...

See above.


Alex


From irvine.david at gmail.com  Wed Feb 15 19:00:43 2006
From: irvine.david at gmail.com (dirvine)
Date: 15 Feb 2006 16:00:43 -0800
Subject: Encryption
Message-ID: <1140048043.749776.198460@g43g2000cwa.googlegroups.com>

HI hope you can help (know you can).

I am looking for a very strong AIS or better symetrical encryption in
python. Any suggestions ideas welcome. I have spent a lot of time
looking everywhere at pycrypto and many others but is a wee bit of a
minefield out there. Anyone have any experience of a true encryption
(not xor or anything weak). I am looking for something strong enough to
encrypt your credit card info and publish file on website (no not
actually do that but have encryption strong enough if you did).

Many thanks and if I have missed obvious docs please take it easy on me
- I am new here :-)



From johnjsal at NOSPAMgmail.com  Sat Feb 11 16:43:33 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Sat, 11 Feb 2006 16:43:33 -0500
Subject: simple math question
In-Reply-To: <RuWdnVmaD4Q23XPeRVn-tw@rcn.net>
References: <RuWdnVmaD4Q23XPeRVn-tw@rcn.net>
Message-ID: <JrSdnac_xMxYx3PenZ2dnUVZ_tmdnZ2d@rcn.net>

John Salerno wrote:
> Hi all. I'm just starting out with Python, so I'm a little slow right 
> now. :)
> 
> Can someone explain to me why the expression 5 / -2 evaluates to -3, 
> especially considering that -2 * -3 evaluates to 6?
> 
> I'm sure it has something to do with the negative number and the current 
> way that the / operator is implemented, but why doesn't it evaluate to 
> -2 instead?

Thanks for the help guys! It's clearer to me now, and I think I was just 
conceptualizing it the wrong way in the first place.


From python.list at tim.thechases.com  Mon Feb 27 04:13:08 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Mon, 27 Feb 2006 03:13:08 -0600
Subject: PEP 354: Enumerations in Python
In-Reply-To: <4402B91A.4010108@tim.thechases.com>
References: <87accdplbj.fsf@rose.polar.local>
	<4402B91A.4010108@tim.thechases.com>
Message-ID: <4402C2A4.1030902@tim.thechases.com>

> Uniqueness imposes an odd constraint that you can't have 
> synonyms in the set:
> 
>  >>> shades = enum({white:100, grey:50, gray:50, black:0})

Blast, I hate responding to my own posts, but as soon as I 
hit Send, I noticed the syntax here was biffed.  Should have 
been something like

 >>> shades = enum(("white", 100), ("grey", 50), 
("gray",50), ("black", 50))

Same could go for days of the week:

 >>> dow=enum(("sunday", 0), ("monday", 1), 
("start_of_work_week", 1), ... ("friday", 5), 
("end_of_work_week", 5)...)

Given more little grey cells (or gray cells?), I'm sure  I 
could come up with more examples of when it's handy to have 
duplicate values in an enum...

-tkc





From zefria at gmail.com  Mon Feb 20 16:57:29 2006
From: zefria at gmail.com (Zefria)
Date: 20 Feb 2006 13:57:29 -0800
Subject: Quesion about the proper use of __slots__
In-Reply-To: <43f9c481$0$3317$636a55ce@news.free.fr>
References: <1140424508.393412.79140@o13g2000cwo.googlegroups.com>
	<43f9825e$0$4777$636a55ce@news.free.fr>
	<1140426860.033363.237150@o13g2000cwo.googlegroups.com>
	<dtc219$h0a$01$1@news.t-online.com>
	<1140428016.170547.315710@g47g2000cwa.googlegroups.com>
	<1140432487.272405.297100@f14g2000cwb.googlegroups.com>
	<43f9c481$0$3317$636a55ce@news.free.fr>
Message-ID: <1140472649.142912.61700@f14g2000cwb.googlegroups.com>

I am aware of this; but with too much Java still running through my
brain I've never bothered with the idea yet because that's simply not
the way I learned and I've never had a chance to need new attributes
for singular instances.

"__slots__ is not a method, so it falls outside that purpose as stated.
" -Alex Martelli

It's listed within the special methods section of the Python Refrence,
was what I ment.



From claird at lairds.us  Mon Feb 20 15:08:02 2006
From: claird at lairds.us (Cameron Laird)
Date: Mon, 20 Feb 2006 20:08:02 GMT
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<mailman.2131.1140377578.27775.python-list@python.org>
	<yfsbqx3ov29.fsf@oc.ex.ac.uk> <eq7pc3-ml5.ln1@lairds.us>
Message-ID: <7cjpc3-2a.ln1@lairds.us>

In article <eq7pc3-ml5.ln1 at lairds.us>, I wondered:
>In article <yfsbqx3ov29.fsf at oc.ex.ac.uk>,
>Alexander Schmolck  <a.schmolck at gmail.com> wrote:
>			.
>			.
>			.
>>However I don't find it at all implausible to assume that had Guido known all
>>the stuff that say, David Ungar and Guy Steele were aware of at the same time,
>>python would have come out not necessarily less dynamic but considerably
>>faster -- to its own detriment.
>>
>>'as
>
>
>Alexander, you've lost me.  I *think* you're proposing that,
>were Guido more knowledgeable, he would have created a Python
>language that's roughly as we know now, implemented it with
>FASTER software ... and "to its own detriment".  Do you truly
>believe that fewer people would use Python if its execution
>were faster?

I think I can answer my own question:  yes.  Since posting, I came
across a different follow-up where Alexander explains that he sees
healthy elements of the Python ethos--focus on a reliable, widely-
used library, willingness to make Python-C partnerships, and so
on--as results at least in part of early acceptance of Python as
intrinsically slow.  That's too interesting an argument for me to
respond without more thought.


From steve at REMOVETHIScyber.com.au  Fri Feb 17 04:40:33 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 17 Feb 2006 20:40:33 +1100
Subject: Open Relay Test
References: <1140150719.298606.9710@g44g2000cwa.googlegroups.com>
	<mailman.2039.1140154929.27775.python-list@python.org>
Message-ID: <pan.2006.02.17.09.40.33.407043@REMOVETHIScyber.com.au>

On Fri, 17 Feb 2006 00:40:51 -0500, Steve Holden wrote:

> D wrote:
>> Hi all .. how could one test to see if an open relay exists on a
>> specific email server?
>> 
> I bet spammers would love someone to answer that question for them. You 
> wouldn't be planning spam, by any chance?

The spammers already know how to look for open relays. Unlike the original
poster, they know how to use Google. *wink*

Besides, not just spammers want to detect open relays. Many people like to
block mail from open relays.



-- 
Steven.



From vania.smirk at gmail.com  Mon Feb 13 12:07:00 2006
From: vania.smirk at gmail.com (VSmirk)
Date: 13 Feb 2006 09:07:00 -0800
Subject: hard disk activity
Message-ID: <1139850420.902979.71620@o13g2000cwo.googlegroups.com>

I have a task that involves knowing when a file has changed.  But while
for small files this is an easy enough task, checking the modification
dates, or doing a compare on the contents, I need to be able to do this
for very large files.

Is there anything already available in Python that will allow me to
check the hard-disk itself, or that can make my routines aware when a
disk write has occurred?

Thanks for any help,

V



From bonono at gmail.com  Sun Feb 12 01:27:30 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 11 Feb 2006 22:27:30 -0800
Subject: functional 0.5 released
In-Reply-To: <mailman.1773.1139724528.27775.python-list@python.org>
References: <mailman.1723.1139591624.27775.python-list@python.org>
	<1139630268.808659.148890@o13g2000cwo.googlegroups.com>
	<mailman.1773.1139724528.27775.python-list@python.org>
Message-ID: <1139725650.536067.268890@g14g2000cwa.googlegroups.com>


Collin Winter wrote:
> On 10 Feb 2006 19:57:48 -0800, bonono at gmail.com <bonono at gmail.com> wrote:
> >
> > Collin Winter wrote:
> > > As always, feedback welcome!
> >
> > Any specific reason flip only flip the first 2 arguments rather than
> > the whole tuple ?
> >
> > That is, I would like to see:
> >
> > assert(f(a,b,c, d) == flip(f)(d, c, b, a))
>
> Because that's what I'm used to from Haskell and other functional
> languages : ) I'll see what I can do about having it flip all
> arguments in the next release.
>
Thanks for looking into it.

BTW, I do a quick test on the C version(supposed to be faster) and
found something interesting:

Your partial implementation is slower than new.instancemethod(func,
arg, object), may be you would like to have some micro optimization to
use that instead for the special case(and I believe over 70% of the
case) of :

partial(func, arg)

Another thing I am wondering is if a compose_m(which means
f(*g(*arg,**kw)) ) is desirable as that would give me a choice if I
want to expand the result of g(if it is a tuple) to multi-argument
rather than single tuple. This is not a problem in Haskell which is
fully curried but python in general is not. Another option may be a
helper function like unpack in lua. So I can do compose(compose(f,
unpack), g) which means f(unpack(g(*arg,**kw))).



From elpX at adsihqX.com  Tue Feb 21 19:25:12 2006
From: elpX at adsihqX.com (Dr. Pastor)
Date: Wed, 22 Feb 2006 00:25:12 GMT
Subject: Video.
In-Reply-To: <bAMKf.4037$UN.840@newsread2.news.pas.earthlink.net>
References: <bAMKf.4037$UN.840@newsread2.news.pas.earthlink.net>
Message-ID: <IbOKf.2584$VI6.768@newsread1.news.pas.earthlink.net>

Many thanks to you All.


From lycka at carmen.se  Fri Feb 24 05:13:50 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 24 Feb 2006 11:13:50 +0100
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <mailman.2376.1140733288.27775.python-list@python.org>
References: <dtl9ad$35h$1@sea.gmane.org> <dtlat7$80c$1@sea.gmane.org>
	<mailman.2376.1140733288.27775.python-list@python.org>
Message-ID: <dtmm8v$fid$1@wake.carmen.se>

Paul Probert wrote:
> Yes, I'm doing this:
>           .....
>          oldtime=time.time()
>          time.sleep(1)
>          newtime=time.time()
>          dt=newtime-oldtime
>           if dt > 2:
>               print 'dt=',dt,' time=',time.strftime('%Y_%m_%d_%Hh_%Mm_%Ss')
> Its happening roughly 4 times a day total on our 20 machines, ie about 
> once every 5 days on a given machine.

So, it happens roughly one time out of 400 000 sleeps?

With an operating system such as Windows, this is
probably something you can expect to happen, although
I'm surprised if such long lag times as 200 s are typical.

If you need real time characteristics, you should
probably use a real time operating system, not Windows.

The operating system can schedule jobs as it likes,
and your sleep is obviously just the right time to hand
off the CPU to some other process.

Of course, if something takes 200 seconds, it's typically
because some process is waiting for IO, and if it's waiting
for IO, the CPU should be used by other processes, such as
yours.

Perhaps you can use the event log or some performance
measurement tools to check if something else on the system
happens to coincide with your long delays.


From jstroud at ucla.edu  Tue Feb 28 17:11:21 2006
From: jstroud at ucla.edu (James Stroud)
Date: Tue, 28 Feb 2006 14:11:21 -0800
Subject: Get my airlines boarding pass
In-Reply-To: <1141140050.737063.259690@p10g2000cwp.googlegroups.com>
References: <1141140050.737063.259690@p10g2000cwp.googlegroups.com>
Message-ID: <du2hq9$s95$1@daisy.noc.ucla.edu>

rh0dium wrote:
> Hi all,
> 
> Has any of you fine geniuses figured out a nice python script to go to
> the Southwest airlines website and check in, and retrieve your boarding
> pass - automatically 24 hours in advance
> 

Not yet, but I think you are the real genius here. Brilliant idea.


From steve at holdenweb.com  Tue Feb 21 23:27:47 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 21 Feb 2006 23:27:47 -0500
Subject: a little more help with python server-side scripting
In-Reply-To: <TNidnXChVrTve2beRVn-pQ@rcn.net>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>	<1140571718.278297.105080@f14g2000cwb.googlegroups.com>
	<TNidnXChVrTve2beRVn-pQ@rcn.net>
Message-ID: <dtgp83$asm$1@sea.gmane.org>

John Salerno wrote:
> Ben Cartwright wrote:
> 
> 
>>>The script can be given a executable mode, or permission, using the
>>>chmod command:
>>>
>>>  $ chmod +x myscript.py
>>
>>And this answers your second.  Your host needs to know the path to your
>>script so they can use chmod to make it executable.
> 
> 
> Where does this line go? Just at the top as well?

Nope. I presume you can log in to your web server using ssh or telnet or 
similar. In which case you do so. Then use the commands

cd {wherever}/cgi-bin
chmod +x test.py

to make the script executable, and therefore recognised as a proper 
script by Apache.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From donn at drizzle.com  Thu Feb 16 21:07:39 2006
From: donn at drizzle.com (Donn Cave)
Date: Fri, 17 Feb 2006 02:07:39 -0000
Subject: Installing python on lynxOS
References: <1140139144.787566.207230@g14g2000cwa.googlegroups.com>
Message-ID: <1140142059.38766@jetspin.drizzle.com>

Quoth "Bryce" <Bryce.Cooper at gmail.com>:
| I'm trying to install python2.4.2 onto lynxOS 4.0.0. with gcc 2.95.3.
| I was wondering if anyone who has done this before could give me some
| pointers.
|
| I'm currently getting the following error when running make:
|
|     gcc -o python Module/python.o libpython2.4.a -lsocket -lm
|     called2:ld returned 1 exit status
|     libpython2.4.a(pystate.o):In function 'PyThreadState_New':
| Python2.4.2/pystate.c:191: undefined reference to
| '_PyGILState_NoteThreadState'
|     called2:ld returned 1 exit status
|
| I checked pystate.c and the function _PyGILState_NoteThreadState is
| defined in the file, so I'm a bit lost here.

If you look about 50 lines up from there, you'll see that it's
conditional on the WITH_THREAD preprocessor macro.

If it's not defined because LynxOS doesn't have threads or at any
rate there isn't a usable thread implementation among the existing
thread_xyz.c options, you might be able to get past this problem by
writing a trivial version of the function for the case where WITH_THREAD
is not defined.  I haven't looked at it, to know for sure what would
be appropriate - maybe it was put inside WITH_THREAD in error, in the
first place, for all I know.

If you think you probably should be getting threads, then look at
pyconfig.h to verify this.

	Donn Cave, donn at drizzle.com


From reply.in.the.newsgroup at my.address.is.invalid  Tue Feb 28 14:36:06 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Tue, 28 Feb 2006 20:36:06 +0100
Subject: Threading - will threads run in parallel?
References: <1141154405.709674.325760@t39g2000cwt.googlegroups.com>
Message-ID: <7e9902tg2t188i2u265tg79m9tmpv70mrt@4ax.com>

SolaFide:
>(get() is a function which waits for a ping on a specific port, thus
>stopping the program for a while.)
>
>Will these run together, 

Thread 2 can run while thread 1 is blocked for I/O and v.v.

>Also, is it possible to split off a program for the terminal that
>started it? As in I type in python test.py and test.py runs in the
>background and lets me do other things in that terminal?

Platform? Shell?

-- 
Ren? Pijlman


From steve at holdenweb.com  Mon Feb 13 00:43:38 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Feb 2006 00:43:38 -0500
Subject: Is python very slow compared to C
In-Reply-To: <43F01749.2000601@REMOVEMEcyber.com.au>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>	<1139754010.067582.214830@z14g2000cwz.googlegroups.com>	<pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>	<mailman.1785.1139762698.27775.python-list@python.org>	<pan.2006.02.12.17.18.50.356928@REMOVETHIScyber.com.au>	<1139793721.739325.235780@z14g2000cwz.googlegroups.com>
	<43F01749.2000601@REMOVEMEcyber.com.au>
Message-ID: <dsp6a7$t3d$1@sea.gmane.org>

Steven D'Aprano wrote:
> bonono at gmail.com wrote:
> 
> 
>>I can speak the same about Python if I view it from a prototype based
>>perspective, where one get them for free in Lua but need to implement
>>them in Python.
> 
> 
> Sure. And if you need prototypes, then all else being 
> equal that would be a disadvantage of Python compared 
> to Lua.
> 
> On the other hand, I'd suggest that far more 
> programmers are familiar with classes than prototypes, 
> regardless of any objective advantages or disadvantages 
> of one over the other. Perhaps that's one of the 
> reasons why Lua is lacking the market penetration of 
> Python: programmers may look at it and say "No classes? 
> Prototyping? WTF is that? I don't have time to learn 
> something so different, better stick to languages which 
> have a smaller learning curve."
> 
> 
> 
Or perhaps they'll see that Self demonstrated the advantages and 
disadvantages of the prototyping approach long ago.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From scott.daniels at acm.org  Mon Feb 27 14:04:06 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Mon, 27 Feb 2006 11:04:06 -0800
Subject: sort one list using the values from another list
In-Reply-To: <zpAMf.109772$4l5.24415@dukeread05>
References: <mailman.2447.1140969980.27775.python-list@python.org>
	<Bb-dncKoOeYvQ5zZRVn-uw@comcast.com>
	<1140981038.788111.93500@j33g2000cwa.googlegroups.com>
	<9bpMf.109707$4l5.58949@dukeread05>
	<1140990438.693026.14600@p10g2000cwp.googlegroups.com>
	<00sMf.109743$4l5.9230@dukeread05>
	<1hbdmux.1uvypp25sjx7jN%aleaxit@yahoo.com>
	<I6tMf.109755$4l5.106334@dukeread05>
	<zpAMf.109772$4l5.24415@dukeread05>
Message-ID: <44034b68$1@nntp0.pdx.net>

Ron Adam wrote:
> Ron Adam wrote:
>> Alex Martelli wrote:
>>> Ron Adam <rrr at ronadam.com> wrote:
>>>    ...
>>>> Considering the number time I sort keys after getting them, It's the 
>>>> behavior I would prefer.  Maybe a more dependable dict.sortedkeys() 
>>>> method would be nice.  ;-)
>>>
>>> sorted(d) is guaranteed to do exactly the same thing as sorted(d.keys())
>>> AND to be faster (would be pretty weird if it weren't faster...!).
>>>
>>> E.g., ...:
>>>
>>> helen:~ alex$ python -mtimeit -s'd=dict(enumerate("tarazoplay"))'
>>> 'sorted(d.keys())'
>>> 100000 loops, best of 3: 6.82 usec per loop
>>>
>>> helen:~ alex$ python -mtimeit -s'd=dict(enumerate("tarazoplay"))'
>>> 'sorted(d)'
>>> 100000 loops, best of 3: 5.98 usec per loop
>>>
>>>
>>> Alex
>>
>>
>> Yes, it did decrease it.  And simplified it as well. ;)
>>
>> def psort11(s1, s2):
>>     d = dict(zip(s2, s1))
>>     assert len(d) == len(s1)
>>     sorted(d)
>>     s1[:] = d.values()

Dictionaries are not ordered, the "sorted" line does nothing except produce
a sorted list of the dictionary's keys which is ignored.

> This probably should be:
> 
> def psort11(s1, s2):
>     d = dict(zip(s2,s1))
>     assert len(d) == len(s1)
>     s1[:] = list(d[v] for v in sorted(d))

You could do this to avoid all of those lookups:

      def psort_xx(s1, s2):
          pairs = sorted(dict(zip(s2, s1)).iteritems())
          assert len(pairs) == len(s1)
          s1[:] = [s1_value for s2_value, s1_value in pairs]


-- 
-Scott David Daniels
scott.daniels at acm.org


From enterr at gmail.com  Wed Feb 15 15:59:52 2006
From: enterr at gmail.com (Atanas Banov)
Date: 15 Feb 2006 12:59:52 -0800
Subject: pop line from file
References: <mailman.1939.1139998965.27775.python-list@python.org>
	<slrndv69pd.8qf.sybrenUSE@schuimige.unrealtower.org>
Message-ID: <1140037192.930780.218270@g44g2000cwa.googlegroups.com>

Sybren Stuvel wrote:

> If you're working on a UNIX platform, you could use FIFO pipes, see
> 'mkfifo'.

named pipes exist on windows, see win32pipe.CreateNamedPipe



From lycka at carmen.se  Wed Feb  1 06:09:38 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 01 Feb 2006 12:09:38 +0100
Subject: Python vs C for a mail server
In-Reply-To: <1138740752.788773.140740@g47g2000cwa.googlegroups.com>
References: <mailman.3994.1138546139.27774.python-list@python.org>
	<mailman.1197.1138549204.27775.python-list@python.org>
	<1138573692.600171.49110@f14g2000cwb.googlegroups.com>
	<mailman.1205.1138574433.27775.python-list@python.org>
	<1138579859.563134.89880@f14g2000cwb.googlegroups.com>
	<1h9xphx.1i4agxjozicz9N%aleax@mail.comcast.net>
	<1138740752.788773.140740@g47g2000cwa.googlegroups.com>
Message-ID: <drq4tj$ss3$1@wake.carmen.se>

Randall Parker wrote:
> C++ provides ways to be type unsafe. Does that mean that C++ is type
> unsafe period? Most code in C++ is going to be type safe. Some
> programmers will never do dangerous casting. Others will do bad things
> with casts.

Sure, but on the other hand, you are really on your own when you
avoid the compile time type safety in C++. While you might get an
exception in Python, which you can handle in your code, or at least
get a traceback from, anything can happen in C++, from data
corruption to core dumps.


From Allerdyce.John at gmail.com  Sun Feb 26 13:35:32 2006
From: Allerdyce.John at gmail.com (Allerdyce.John at gmail.com)
Date: 26 Feb 2006 10:35:32 -0800
Subject: How to use python regular expression to substitute string value
Message-ID: <1140978932.892295.322370@z34g2000cwc.googlegroups.com>

Hi,
I am new to python. I would like to know how to use python regular
expression to substitute string value?
I have an input string like this:
x:11 y:0 w:760 h:19 area:14440 areaPerCent:0
totalAreaPerCent:-3.08011e+16 type:3 path:///-/1/1

and I would like to convert it to:
rect x="11" y="0" width="760" height="14440"

all I care about the input string is x, y, w, h.

Thank you for any pointers.



From uche.ogbuji at gmail.com  Tue Feb  7 13:02:07 2006
From: uche.ogbuji at gmail.com (uche.ogbuji at gmail.com)
Date: 7 Feb 2006 10:02:07 -0800
Subject: Large XML Document Processing
In-Reply-To: <mailman.1125.1138351482.27775.python-list@python.org>
References: <mailman.1125.1138351482.27775.python-list@python.org>
Message-ID: <1139333997.662067.199370@f14g2000cwb.googlegroups.com>

Albert Leibbrandt wrote:
> Hi
>
> Just want to check which xml parser you guys have found to be the
> quickest. I have xml documents with 250 000 records or more and the
> processing of these documents are taking way to long. The validation is
> the main problem. Any module names, non validating would be find to,
> would help a lot.

It would help us help you if you posted samples of the target docs.
XML processing strategy often depends on the structure of the XML, just
as relational query optimization strategy often depends on the schema.
In general SAX or iterative tree-callback methods will give you the
best speed.  Fredrik already mentioned ElementTree's IterParse.
Amara's pushbind and pushdom and 4Suite's Saxlette (which has some neat
callback features) are other options.

http://uche.ogbuji.net/tech/4suite/amara/
http://4suite.org/docs/CoreManual.xml#saxlette

--
Uche Ogbuji                               Fourthought, Inc.
http://uche.ogbuji.net                    http://fourthought.com
http://copia.ogbuji.net                   http://4Suite.org
Articles: http://uche.ogbuji.net/tech/publications/



From peter at engcorp.com  Tue Feb 21 10:37:24 2006
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 21 Feb 2006 10:37:24 -0500
Subject: Pyserial never read
In-Reply-To: <slrndvm0sr.6k1.nick@irishsea.home.craig-wood.com>
References: <1140105936.408387.88130@z14g2000cwz.googlegroups.com>	<1140219414.143448.234450@z14g2000cwz.googlegroups.com>	<1140302110.028540.176210@g43g2000cwa.googlegroups.com>
	<slrndvm0sr.6k1.nick@irishsea.home.craig-wood.com>
Message-ID: <dtfc3h$l0i$1@sea.gmane.org>

Nick Craig-Wood wrote:
> luca72 <lucaberto at libero.it> wrote:
> 
>> Thanks for your help, but it don't solve the problem.
>> I receive only the echo and full stop.
> 
> Try swapping pins 2 and 3 in the lead.

Anything's possible, but given that in his original post he says it 
works when he uses Delphi, it seems unlikely making a change to the 
hardware is necessary.

-Peter



From rasky at develer.com  Mon Feb 13 10:25:45 2006
From: rasky at develer.com (Giovanni Bajo)
Date: Mon, 13 Feb 2006 16:25:45 +0100
Subject: [ANN] PyInstaller 1.1 released
Message-ID: <023201c630b1$c25c4790$bf03030a@trilan>

PyInstaller 1.1
***************

PyInstaller 1.1 has been released! This release has been composed also with
the help of patches provided by the community: many thanks to everybody!

Find the downloads at the usual locations:

http://pyinstaller.hpcf.upr.edu  (website)
http://pyinstaller.hpcf.upr.edu/source/1.1/pyinstaller_1.1.zip
http://pyinstaller.hpcf.upr.edu/source/1.1/pyinstaller_1.1.tar.gz


ChangeLog for this release:

 + (Windows) Make single-file packages not depend on MSVCRT71.DLL anymore,
   even under Python 2.4. You can eventually ship your programs really as
   single-file executables, even when using the newest Python version!
 + Fix problem with incorrect python path detection. Now using helpers from
   distutils.
 + Fix problem with rare encodings introduced in newer Python versions: now
all
   the encodings are automatically found and included, so this problem
should
   be gone forever.
 + Fix building of COM servers (was broken in 1.0 because of the new build
   system).
 + Mimic Python 2.4 behaviour with broken imports: sys.modules is cleaned up
   afterwise. This allows to package SQLObject applications under Windows
   with Python 2.4 and above.
 + Add import hook for the following packages:
     + GTK
     + PyOpenGL (tested 2.0.1.09)
     + dsnpython (tested 1.3.4)
     + KInterasDB (courtesy of Eugene Prigorodov)
 + Fix packaging of code using "time.strptime" under Python 2.3+.
 + (Linux) Ignore linux-gate.so while calculating dependencies (fix provided
   by Vikram Aggarwal).
 + (Windows) With Python 2.4, setup UPX properly so to be able to compress
   binaries generated with Visual Studio .NET 2003 (such as most of the
   extensions). UPX 1.92+ is needed for this.

-- 
Giovanni Bajo



From catdude at catfolks.net  Thu Feb 23 18:54:06 2006
From: catdude at catfolks.net (CatDude)
Date: Thu, 23 Feb 2006 15:54:06 -0800
Subject: Concantenation and string slicing
References: <1140735316.752278.298490@v46g2000cwv.googlegroups.com>
Message-ID: <pan.2006.02.23.23.54.06.59663@catfolks.net>

On Thu, 23 Feb 2006 14:55:16 -0800, DannyB wrote:

> I've written a program that takes a phrase and spits it back out
> backwards.  My problem is it throws each character on a new line.  I'd
> like the phrase to be on the same line.  Is this possible?

First suggestion: Put a comma at the end of the "print" line:

>         print newMessage,




From kayama at st.rim.or.jp  Fri Feb 24 20:26:45 2006
From: kayama at st.rim.or.jp (Akihiro KAYAMA)
Date: Sat, 25 Feb 2006 10:26:45 +0900 (JST)
Subject: Pure python implementation of string-like class
Message-ID: <20060225.102645.74687871.kayama@st.rim.or.jp>


Hi all.

I would like to ask how I can implement string-like class using tuple
or list. Does anyone know about some example codes of pure python
implementation of string-like class?

Because I am trying to use Python for a text processing which is
composed of a large character set. As the character set is wider than
UTF-16(U+10FFFF), I can't use Python's native unicode string class.

So I want to prepare my own string class, which provides convenience
string methods such as split, join, find and others like usual string
class, but it uses a sequence of integer as a internal representation
instead of a native string.  Obviously, subclassing of str doesn't
help.

The implementation of each string methods in the Python source
tree(stringobject.c) is far from python code, so I have started from
scratch, like below:

    def startswith(self, prefix, start=-1, end=-1):
        assert start < 0, "not implemented"
        assert end < 0, "not implemented"
        if isinstance(prefix, (str, unicode)):
            prefix = MyString(prefix)
        n = len(prefix)
        return self[0:n] == prefix

but I found it's not a trivial task for myself to achive correctness
and completeness. It smells "reinventing the wheel" also, though I
can't find any hints in google and/or Python cookbook.

I don't care efficiency as a starting point. Any comments are welcome.
Thanks.

-- kayama


From martin at v.loewis.de  Mon Feb  6 17:25:04 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 06 Feb 2006 23:25:04 +0100
Subject: Compiling
In-Reply-To: <1139209103.702078.156180@g47g2000cwa.googlegroups.com>
References: <mailman.1387.1138986082.27775.python-list@python.org>
	<43e392d1$0$31853$626a54ce@news.free.fr>
	<mailman.1390.1138988111.27775.python-list@python.org>
	<43e3972f$0$624$626a14ce@news.free.fr>
	<1139149306.188367.193770@g47g2000cwa.googlegroups.com>
	<43E6493B.2050503@v.loewis.de>
	<1139209103.702078.156180@g47g2000cwa.googlegroups.com>
Message-ID: <43E7CCC0.8070009@v.loewis.de>

Ravi Teja wrote:
> But more often I am looking to use Python libraries
> in other languages since I am more familiar with them and they
> typically tend to be more high level (the way I like it) than the
> standard libraries of others.

Ah. In that case, the normal C API should work fine to call into Python
in most cases, no? If not, have you tried the CXX package, or
Boost::Python?

Regards,
Martin


From steve at REMOVETHIScyber.com.au  Fri Feb 24 06:00:25 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 24 Feb 2006 22:00:25 +1100
Subject: "Temporary" Variable
References: <1140665472.203495.7570@g44g2000cwa.googlegroups.com>
	<43FD6645.3020201@REMOVEMEcyber.com.au>
	<1140725159.143882.202630@j33g2000cwa.googlegroups.com>
	<pan.2006.02.23.22.19.38.642977@REMOVETHIScyber.com.au>
	<ZmsLf.21067$915.1256@southeast.rr.com>
	<pan.2006.02.24.09.42.22.818116@REMOVETHIScyber.com.au>
	<1140774640.169997.250840@u72g2000cwu.googlegroups.com>
Message-ID: <pan.2006.02.24.11.00.25.76268@REMOVETHIScyber.com.au>

On Fri, 24 Feb 2006 01:50:40 -0800, bonono wrote:

> Steven D'Aprano wrote:
>> Just out of curiosity, when do you think is the right time to begin
>> teaching programmers good practice from bad? Before or after they've
>> learnt bad habits?
> 
> When you have authority over the coding guideline. 

By that logic, only senators and other government ministers are allowed
to tell people "Committing murder is strongly discouraged, don't do it",
because only they have authority over what is made law and what is not.

I don't need to be Guido van Rossum to know that calling a dict
"myFloat" is a terrible idea. Your suggestion that one needs somehow to be
authorized (by whom?) before you are allowed to point out poor programming
practice not only goes against the entire community ethos of
comp.lang.python, but is offensive in the extreme.


> Naming things is not
> something limited to programming and most people know the importance of
> choosing the appropriate ones. 

"Most people". Let's not mention the Chevy Nova ("it won't go") then,
will we? 

Car manufacturers seem to have a talent for not just choosing
bad names, but for getting them horribly, horribly wrong. I suggest
you google on "Opel Ascona", "Buick LaCrosse", "Honda Fitta", "Mitsubishi
Pajero", and the "Mazda LaPuta", to discover just why those cars went over
like lead balloons in places like Spain, Finland and Quebec.

But I digress. What of those that don't know the importance of choosing
appropriate names? We should just let them shoot themselves in the foot,
even when it is obvious to Blind Freddy that they are struggling with some
really basic concepts, and that they probably don't even know the gun is
loaded?


> If on the other hand some names have
> been chosen that have actual side effect(in python program), like
> builtin function names, it is appropriate to point that out, 

By your earlier logic, that should only be permitted to those who have
authority to create builtins, certainly not the likes of you and me. 


-- 
Steven.



From Ido.Yehieli at gmail.com  Wed Feb 15 18:28:32 2006
From: Ido.Yehieli at gmail.com (Ido Yehieli)
Date: 15 Feb 2006 15:28:32 -0800
Subject: apache mod_python problem
In-Reply-To: <43f3b460$1@news.uni-ulm.de>
References: <1140042611.557816.247140@g14g2000cwa.googlegroups.com>
	<43f3b460$1@news.uni-ulm.de>
Message-ID: <1140046112.527015.144420@g14g2000cwa.googlegroups.com>

Thank you for your response,
but I think it's not it - that didn't make any difference.



From felipe.lessa at gmail.com  Sun Feb 12 20:31:50 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sun, 12 Feb 2006 23:31:50 -0200
Subject: Questions for BitTorrent's Author, Bram Cohen
In-Reply-To: <dsomad$lea$1@sea.gmane.org>
References: <dsomad$lea$1@sea.gmane.org>
Message-ID: <1139794311.7547.15.camel@kenshin>

Em Dom, 2006-02-12 ?s 20:10 -0500, Steve Holden escreveu:
> I'd like the questions to be representative of as broad a cross-section 
> of the Python community as possible. If you have a question you'd like 
> to hear Bram answer please let me know and I'll try to include them.

Something I think lots of people want to know: why Python, and not
anything else?

> regards
>   Steve

Cheers,
Felipe.

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From pprobert at wisc.edu  Thu Feb 16 22:58:36 2006
From: pprobert at wisc.edu (Paul Probert)
Date: Thu, 16 Feb 2006 21:58:36 -0600
Subject: calculating on matrix indices
In-Reply-To: <43F50D7F.8010108@bryant.edu>
References: <43F50D7F.8010108@bryant.edu>
Message-ID: <dt3hp0$7m5$1@sea.gmane.org>

Brian Blais wrote:
> Hello,
> 
> In my attempt to learn python, migrating from matlab, I have the following problem. 
> Here is what I want to do, (with the wrong syntax):
> 
> from numpy import *
> 
> t=arange(0,20,.1)
> x=zeros(len(t),'f')
> 
> idx=(t>5)
> tau=5
> x[idx]=exp(-t[idx]/tau)  # <---this line is wrong (gives a TypeError)
> 
> #------------------
> 
> what is the best way to replace the wrong line with something that works: replace all 
> of the values of x at the indices idx with exp(-t/tau) for values of t at indices idx?
> 
> I do this all the time in matlab scripts, but I don't know that the pythonic 
> preferred method is.
> 
Brian,
First, let me warn you I only know the old Numeric, and I haven't made 
the jump to Numpy yet. I'm told the syntax is about the same though.
Using nonzero, put, and take, I can do what you want like this:

import Numeric as num
t=num.arange(0,20,.1)
x=num.zeros(len(t),'f')
idx=num.nonzero(t>5)
tau=5.
num.put(x,idx,num.exp(-num.take(t,idx)/tau))

Kinda messy compared to Matlab. Do you know about Octave 
(www.octave.org)? It tries to be compatible with Matlab syntax. Of 
course it lacks the other niceties of python.

Paul Probert




From dc1001 at ecs.soton.ac.uk  Mon Feb 13 09:35:09 2006
From: dc1001 at ecs.soton.ac.uk (Dimitrios Charitatos)
Date: Mon, 13 Feb 2006 14:35:09 +0000
Subject: Image to numeric array
Message-ID: <1139841309.43f0991d108c7@secure.ecs.soton.ac.uk>

Hello, 

I suspect that there is a quite straight forward answer to this, but I can't
find it... I want to import an image and extract a matrix (or array) from it
with elements showing the RGB value of each pixel. But I want to be able to do
this with all types of image formats. It was suggested that a function such as
'B = numeric.from_image(A)' was used but I can't find it in any of the
libraries. I was hoping you could help me on this.

Thank you,
Dimitris 



From zefria at gmail.com  Mon Feb 20 03:35:08 2006
From: zefria at gmail.com (Zefria)
Date: 20 Feb 2006 00:35:08 -0800
Subject: Quesion about the proper use of __slots__
Message-ID: <1140424508.393412.79140@o13g2000cwo.googlegroups.com>

>>> class Fighter:
...     '''Small one man craft that can only harm other fighters on
their own.'''
...     def __init__(self,statsTuple=(50,5,0,(2,4),1)):
...             self.fuel = statsTuple[0]
...             self.life = statsTuple[1]
...             self.armor = statsTuple[2]
...             self.weapon = statsTuple[3]
...             self.bulk = statsTuple[4]
...             __slots__ =
[self.fuel,self.life,self.armor,self.weapon,self.bulk]
...
>>> ral = Fighter()
>>> ral.rocks = 2
>>> ral.rocks
2
>>> ral.life
5

I was reading the special methods, got to slots
(http://docs.python.org/ref/slots.html) and decided that i should use
this to save memory in the program because it'll have to support very
large numbers of fighers at once. It says that once you define slots
then you can't add any variables not listed in slots, but from that
example section I just did, so am I doing something wrong or did I read
it wrong?



From twic at urchin.earth.li  Thu Feb  2 07:10:01 2006
From: twic at urchin.earth.li (Tom Anderson)
Date: Thu, 2 Feb 2006 12:10:01 +0000
Subject: Why checksum? [was Re: Fuzzy Lookups]
In-Reply-To: <7xpsm6d1vz.fsf@ruckus.brouhaha.com>
References: <1138635665.956131.130630@f14g2000cwb.googlegroups.com>
	<1138670927.377396.78090@g44g2000cwa.googlegroups.com>
	<mailman.1266.1138680617.27775.python-list@python.org>
	<1138721690.283464.71570@g14g2000cwa.googlegroups.com>
	<mailman.1289.1138722708.27775.python-list@python.org>
	<pan.2006.01.31.21.28.14.333129@REMOVETHIScyber.com.au>
	<7xy80wm61h.fsf@ruckus.brouhaha.com>
	<Pine.LNX.4.62.0602010952130.5272@urchin.earth.li>
	<7xpsm6d1vz.fsf@ruckus.brouhaha.com>
Message-ID: <Pine.LNX.4.62.0602021016370.32283@urchin.earth.li>

On Thu, 1 Feb 2006, it was written:

> Tom Anderson <twic at urchin.earth.li> writes:
>
>>> The obvious way is make a list of hashes, and sort the list.
>>
>> Obvious, perhaps, prudent, no. To make the list of hashes, you have to 
>> read all of every single file first, which could take a while. If your 
>> files are reasonably random at the beginning, ...
>
> The possibility of two different mp3 files having the same id3 tags is 
> something you might specifically be checking for.

So read from the end of the file, rather than the beginning.

>> Better yet, note that if two files are identical, they must have the 
>> same length, and that finding the length can be done very cheaply, so a 
>> quicker yet approach is to make a list of lengths, sort that, and look 
>> for duplicates; when you find one, do a byte-by-byte comparison of the 
>> files (probably terminating in the first block) to see if they really 
>> are the same.
>
> Yes, checking the file lengths first is an obvious heuristic, but if you 
> fine you have a bunch of files with the same length, what do you do? 
> You're back to a list of hashes.

Or prefixes or suffixes.

>> By way of example, of the 2690 music files in my iTunes library, i have 
>> twelve pairs of same-sized files [1], and all of these differ within 
>> the first 18 bytes (mostly, within the first 9 bytes).
>
> That's a small enough set of matches that you don't need a general 
> purpose algorithm.

True - and this is *exactly* the situation that the OP was talking about, 
so this algorithm is appropriate. Moreover, i believe is representative of 
most situations where you have a bunch of files to compare. Of course, 
cases where files are tougher to tell apart do exist, but i think they're 
corner cases. Could you suggest a common kind of file with degenerate 
lengths, prefixes and suffixes?

The only one that springs to mind is a set of same-sized image files in 
some noncompressed format, recording similar images (frames in a movie, 
say), where the differences might be buried deep in the pixel data. As it 
happens, i have just such a dataset on disk: with the images in TIFF 
format, i get differences between subsequent frames after 9 bytes, but i 
suspect that's a timestamp or something; if i convert everything to a nice 
simple BMP (throwing away 8 bits per sample of precision in the process - 
probably turning most of the pixels to 0!), then i find differences about 
a megabyte in. If i compare from the tail in, i also have to wade through 
about a megabyte before finding a difference. Here, hashes would be ideal.

tom

-- 
The revolution is here. Get against the wall, sunshine. -- Mike Froggatt


From gregpinero at gmail.com  Sat Feb  4 02:29:29 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Sat, 4 Feb 2006 02:29:29 -0500
Subject: Recursive function going infinite and I can't see why.
In-Reply-To: <312cfe2b0602032318i3fcb075di31406adefd1bbe@mail.gmail.com>
References: <312cfe2b0602032318i3fcb075di31406adefd1bbe@mail.gmail.com>
Message-ID: <312cfe2b0602032329i55c9644eg5deb90efe0bce65b@mail.gmail.com>

By the way, all I'm trying to do here is take two trees, randomly find
a sub-tree of each and swap the sub-trees.  So if anyone has a simple
method for doing that I'm certainly open to that too.

Thanks again,

-Greg


On 2/4/06, Gregory Pi?ero <gregpinero at gmail.com> wrote:
> Hi,
>
> Would anyone be able to tell me why my function below is getting stuck
> in infinite recusion?
> Maybe I'm just tired and missing something obvious?
>
> def replace_within_node(node,oldnode,newnode):
>     if node is oldnode:
>         return newnode
>     else:
>         for varname,value in node.__dict__.items():
>             node.__dict__[varname]=replace_within_node(value,oldnode,newnode)
>         return node
>
> At the end of this email I pasted the whole text of the sample code in
> case it would help to see it in context or maybe step through it?
>
> --
> Gregory Pi?ero
> Chief Innovation Officer
> Blended Technologies
> (www.blendedtechnologies.com)
>
>
> #This is the code that's causing my problem:
> #----------------------------------------------------------------------
>
> import random
> import sys
>
> class Test_Class:
>         pass
> class Node:
>     def __init__(self):
>         self.arg0=0
>         self.arg1=0
>         self.arg2=0
>         self.arg3=0
>
> def snip(node):
>     prob_of_returning_this_node=.4
>     if random.random()<=prob_of_returning_this_node:
>         return node
>     else:
>         if hasattr(node,'__dict__') and len(node.__dict__)>0:
>             return snip(random.choice(node.__dict__.values()))
>         else:
>             return node
>
> def replace_within_node(node,oldnode,newnode):
>     if node is oldnode:
>         return newnode
>     else:
>         if hasattr(node,'__dict__'):
>             for varname,value in node.__dict__.items():
>
> node.__dict__[varname]=replace_within_node(value,oldnode,newnode)
>         return node
>
> def generate_random_program(currdepth,mindepth=2,maxdepth=4):
>     node=Node()
>     if currdepth==maxdepth:
>         return node
>     else:
>         node=Node()
>         for varname,value in node.__dict__.items():
>             node.__dict__[varname]=generate_random_program(currdepth+1,mindepth,maxdepth)
>         return node
>
> def breed(father,mother):
>     #want to take subtree from each input parameter and swap them.
>     snip_from_mother=snip(mother.program)
>     snip_from_father=snip(father.program)
>     program_for_father=replace_within_node(father.program,snip_from_father,snip_from_mother)
>     program_for_mother=replace_within_node(mother.program,snip_from_mother,snip_from_father)
>     return program_for_father,program_for_mother
>
> if __name__=='__main__':
>     dragons=[Test_Class() for i in range(10)]
>     for dragon in dragons:
>         dragon.program=generate_random_program(0)
>     for i in range(100):
>         breed(dragons[0],dragons[1])
>


--
Gregory Pi?ero
Chief Innovation Officer
Blended Technologies
(www.blendedtechnologies.com)


From bearophileHUGS at lycos.com  Sun Feb 19 10:52:28 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 19 Feb 2006 07:52:28 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<1140338593.555029.63860@g43g2000cwa.googlegroups.com>
	<1140362715.264499.275380@z14g2000cwz.googlegroups.com>
Message-ID: <1140364348.309079.299640@f14g2000cwb.googlegroups.com>

Luis M. Gonz?lez>[Shed-Skin] ... but so far it looks great (only one
developer though..).<

Two developers, I am there too :-)

I think people aren't much interested so far because there aren't good
ways to link/join/use SSPython compied code from CPython code. A good
solution is probably to:
- Develop code in CPython
- find if there are slow spots that Psyco can't improve enough
- in this situation move the parts in a module and do some tweaks to
adapt the code (if necessary)
- compile the .py module (to a .pyd, etc) with SS (a single click can
be enough on some operating systems), and then import it as before.

To do this it SS requires to know the types of the input data of the
functions/classes in the module. There are solutions to this, the
simpler one to me seems to infer such types from the code below the if
__name__ == "__main__":
That part can contain tests of all the functions/classes, so such parts
can be used to infer types of the whole module.
To do this automatically SS has to use something like SWIG.

Other developers can probably help with such things, otherwise SS will
probably be dead in a year from now... this is not good for me.

Bye,
bearophile



From anil.pundoor at gmail.com  Tue Feb 28 07:32:48 2006
From: anil.pundoor at gmail.com (anil.pundoor at gmail.com)
Date: 28 Feb 2006 04:32:48 -0800
Subject: Multicolumn in Tix scrolledListBox
Message-ID: <1141129968.573293.117290@i39g2000cwa.googlegroups.com>

hi
 iam using Tix ScrolledListBox widget. is there any option so that i
can disply the items in multiple colums
thanks 
Anil



From ivoras at __yahoo__.com_  Fri Feb  3 06:34:46 2006
From: ivoras at __yahoo__.com_ (Ivan Voras)
Date: Fri, 03 Feb 2006 12:34:46 +0100
Subject: would it be feasable to write python DJing software
In-Reply-To: <1138966084.385205.254410@g14g2000cwa.googlegroups.com>
References: <1138925819.465108.181760@o13g2000cwo.googlegroups.com>
	<druc1r$cre$1@bagan.srce.hr>
	<1138962918.427815.70300@g14g2000cwa.googlegroups.com>
	<drvdq6$gjq$1@bagan.srce.hr>
	<1138966084.385205.254410@g14g2000cwa.googlegroups.com>
Message-ID: <drvf4m$t79$1@bagan.srce.hr>

Fuzzyman wrote:

> Only in as much as doing anything in Python is *really* doing it in C,
> surely ?
> 
> Come to that, you're **really** doing it in machine code...

I've yet to see someone calling

if a == '5':
     print "it's 5"

machine code. It's the distinction on which level the program's logic is 
implemented, not at which level it's executed.


From steve at REMOVETHIScyber.com.au  Mon Feb  6 09:01:43 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Tue, 07 Feb 2006 01:01:43 +1100
Subject: Question about idioms for clearing a list
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
Message-ID: <pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au>

On Mon, 06 Feb 2006 13:35:10 +0000, Steve Holden wrote:

>> I'm wondering why there is no 'clear' for lists. It feels like a common
>> operation for mutable containers. :-/
>> 
> Because it's just as easy to create and assign a new empty list (and 
> have the old unused one garbage collected).
> 
> l = []
> 
> is all you need!

Not so. If that logic were correct, then dicts wouldn't need a clear
method either, because you could just assign a new empty dict with d = {}.

But your own sentence tells us why this is not sufficient: because you
aren't emptying the list, you are reassigning (rebinding) the name. The
old list still exists, and there is no guarantee that it will be garbage
collected, because there is no guarantee that it isn't in use somewhere
else:

L = [0,1,2]
D = {"key": L}
L = []  # rebinds the name L, but the list instance still exists

Perhaps it is arguable that there is no need for a clear method because
L[:] = [] is so easy to do. Personally, while I agree that it is easy, it
is hardly intuitive or obvious, and I too would prefer an explicit clear
method for mutable sequences.


-- 
Steven.



From caseyhHAMMER_TIME at istar.ca  Wed Feb  8 12:51:50 2006
From: caseyhHAMMER_TIME at istar.ca (Casey Hawthorne)
Date: Wed, 08 Feb 2006 17:51:50 GMT
Subject: a question regarding call-by-reference
References: <1139250105.744691.110440@o13g2000cwo.googlegroups.com>
Message-ID: <gnbku1p8h6geb0di0lje7ls3qb5cus7lqg@4ax.com>

Don't send the whole list or parts of the list to the server unless
actually needed!

If the server has to do an append, have the server send back the new
elements to be appended and then do the appending on the client side!

Or

Does the homework specify that the entire mutable type be sent to the
server?


"enjoying the view" <pparkkin at gmail.com> wrote:

>I am working on a school project, trying to build a simple RPC stub
>generator. The idea is that the generator takes a normal python file
>with functions defined in it and produces a client and server stub. The
>client stub has the same functions defined, but they just connect to
>the server and ask it to call the desired functions. The server stub is
>a server listening for incoming requests and dispatching them to the
>appropriate functions and sending back the results. Extremely simple
>and I've gotten it to mostly work, but I have one problem:
>call-by-reference parameters. An example:
>
>A function like this:
>def sum(a, b):
>  return a + b
>
>would yield a client stub like this (simplified):
>def sum(a, b):
>   send_message({'funcname': 'sum', 'args': (a, b)})
>   result = receive_message()
>   return result
>
>Now, this works just fine. I get problems when I try to do something
>like this:
>def add_elm(list):
>   list.append('elm')
>   return
>
>Imported normally this would work fine. The list given as a parameter
>would be one element larger. But when the stubs are generated, the
>function doesn't return anything and the list is appended in the server
>and the client-side list is left untouched. At first I thought the
>solution was easy, just return the changed parameters and place them in
>the parameter variables in the client stub:
>def add_elm(list):
>   send_message({'funcname': 'add_elm', 'args': (list)})
>   response = receive_message()
>   (list) = response.get('args')
>   return response.get('result')
>
>The problem is, this doesn't work. The original list doesn't point to
>the changed list. I have been trying to figure this out and it seems
>that if I just assign to the list variable it just modifies the local
>(to the function) name space, and that those changes aren't reflected
>in the list in the original name space.
>
>I believe there are some ways around this, but I haven't found one that
>would not require any special handling in either the code calling the
>client stub or the original functions. I want to maintain transparency.
>
>etv
--
Regards,
Casey


From bronger at physik.rwth-aachen.de  Fri Feb 24 10:13:19 2006
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Fri, 24 Feb 2006 16:13:19 +0100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com> <43fbc788@usenet01.boi.hp.com>
	<87u0ar3gba.fsf@wilson.homeunix.com>
	<pan.2006.02.22.11.35.14.90948@REMOVETHIScyber.com.au>
	<1140612537.685150.68330@o13g2000cwo.googlegroups.com>
	<7xu0arbkwd.fsf@ruckus.brouhaha.com>
	<1140614911.243300.67200@g47g2000cwa.googlegroups.com>
	<1140617119.964479.200780@g44g2000cwa.googlegroups.com>
	<1140639827.967115.169180@g44g2000cwa.googlegroups.com>
	<1140692367.189942.50520@z14g2000cwz.googlegroups.com>
	<87r75uz3wb.fsf@wilson.homeunix.com>
	<1140792359.326775.106500@u72g2000cwu.googlegroups.com>
Message-ID: <87vev47ptc.fsf@wilson.homeunix.com>

Hall?chen!

"Kay Schluehr" <kay.schluehr at gmx.net> writes:

> Torsten Bronger wrote:
>
>> [...]
>>
>> I'm still afraid of the following scenario: Eventually, people
>> might regard "RPython plus type declarations" (or something
>> similar) as first-class Python because it's faster and runs on
>> more implementations, so they try to stick to it.  So effectively
>> you would have changed Python.
>
> I wonder why you believe that it would run on more platforms?

I meant the following: RPython programs will run on all Python
implementations, *plus* the environments where only RPython is
possible.

> This assertion is justifiable with regard of tiny target hardware
> - but else? I do think that "RPython++" could be a viable
> replacement for C as a systems programming language BECAUSE it is
> connected closely to Python.

Ah, okay.  This was a vision that I didn't understand from previous
postings.

> [...]
>
>> Maybe I misunderstood something because I could not follow all of
>> Kay's text but I think one should not change Python or create a
>> look-alike to allow for better implementations.  The language
>> should fit my brain rather than an implementation.
>
> It should first of all fit the diversity of a programmers needs. C
> was never considered as a hostile brother of Python so why should
> it be Pythons own son?

Because I think it would be tempting to add all necessary declations
in order to make one's code working with the fastest Python
implementation available.  After all, mostly we know the types,
although currently we don't declare them.  It's a purely
psychological issue: People want to create "valueable" code,
pythonistas even more so, ignoring that eventually it may turn out
that this was not a good idea.  Current Python *forces* us to keep
the code as flexible as possible.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus            ICQ 264-296-646


From enterr at gmail.com  Tue Feb 14 15:37:37 2006
From: enterr at gmail.com (Atanas Banov)
Date: 14 Feb 2006 12:37:37 -0800
Subject: Embedding an Application in a Web browser
References: <1139930045.408507.151440@g43g2000cwa.googlegroups.com>
	<1139932108.356041.155100@g14g2000cwa.googlegroups.com>
	<1139932674.447510.213520@o13g2000cwo.googlegroups.com>
	<1139944525.979980.132740@o13g2000cwo.googlegroups.com>
Message-ID: <1139949457.308230.71120@g44g2000cwa.googlegroups.com>


try this: create file named "test.hta" and put inside
---------------------
<HTML>
<BODY>
<SCRIPT LANGUAGE="Python">

import sys
document.writeln("Hello from Python", sys.version)

</SCRIPT>
</BODY>
</HTML>
---------------------
double click to open it, it will work if you have activestate
extensions installed.



From kent at kentsjohnson.com  Sun Feb 12 19:52:45 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Sun, 12 Feb 2006 19:52:45 -0500
Subject: Python equivilant to msgbox()
In-Reply-To: <7CQHf.2690$7C3.1780@trnddc08>
References: <7CQHf.2690$7C3.1780@trnddc08>
Message-ID: <43efd40a$1_2@newspeer2.tds.net>

LittlePython wrote:
> Is there an equivalent to a msgbox() or wscript.echo (via wcsript) . I 
> would like to call this instead of print (to the screen) . I would like 
> to write a simple script that is not an event drive gui but calls input 
> boxes, message boxes, or maybe even a file open browser box as well?

Take a look at EasyGUI:
http://www.ferg.org/easygui/

Kent


From fredrik at pythonware.com  Tue Feb 28 17:41:37 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 28 Feb 2006 23:41:37 +0100
Subject: Rounding up to the nearest exact logarithmic decade
References: <1141165716.023456.318240@u72g2000cwu.googlegroups.com>
Message-ID: <du2jj2$g4h$1@sea.gmane.org>

Derek Basch wrote:

> Given a value (x) that is within the range (1e-1, 1e7) how do I round
> (x) up to the closest exact logarithmic decade? For instance:
>
> 10**3 = 1000
> x = 4978
> 10**4 = 10000
> x = 10000

how about

    >>> import math
    >>> def roundup(x):
    ...    return 10**math.ceil(math.log10(x))
    ...
    >>> roundup(4978)
    10000.0

?

</F>





From nid_oizo at yahoo.com_remove_the_  Tue Feb 28 17:56:11 2006
From: nid_oizo at yahoo.com_remove_the_ (Nicolas Fleury)
Date: Tue, 28 Feb 2006 17:56:11 -0500
Subject: Make staticmethod objects callable?
In-Reply-To: <mailman.2539.1141164570.27775.python-list@python.org>
References: <Ad2Nf.2695$RM2.303150@news20.bellglobal.com>
	<mailman.2539.1141164570.27775.python-list@python.org>
Message-ID: <gy4Nf.2789$RM2.313820@news20.bellglobal.com>

Felipe Almeida Lessa wrote:
> Em Ter, 2006-02-28 ?s 15:17 -0500, Nicolas Fleury escreveu:
> 
>>class A:
>>     @staticmethod
>>     def foo(): pass
>>     bar = foo()
> 
> 
> # Why not:
> 
> def foo(): pass
> 
> class A:
> 	bar = foo()
> 	foo = staticmethod(foo)
> 

Well, you could even do:

class A:
     def foo(): pass
     bar = foo()
     staticmethod(foo)

But it's a bit sad to have a special syntax for decorators then.  It's a 
usability problem, nothing to do with functionality.  There's obvious 
workarounds, but IMHO any user saying "it should just work" is at least 
partly right.

Regards,
Nicolas


From gh at ghaering.de  Tue Feb 14 04:38:21 2006
From: gh at ghaering.de (=?windows-1252?Q?Gerhard_H=E4ring?=)
Date: Tue, 14 Feb 2006 10:38:21 +0100
Subject: Issues installing MySQL-python-0.3.5
In-Reply-To: <20060211173244.805655b7c67e576280eebc9eec5e7522.bbd719d2af.wbe@email.secureserver.net>
References: <20060211173244.805655b7c67e576280eebc9eec5e7522.bbd719d2af.wbe@email.secureserver.net>
Message-ID: <43F1A50D.9030303@ghaering.de>

Sorry for the duplicate email, Keith.

keith at nekotaku.com wrote:
> Hi,
> 
> I am trying to use the Python MySQL APIs and have been attempting to
> install the above software.
> 
> I am using MySQL 5.0.18-standard with Python 2.4.1
> 
> I get errors on the build. Some searching showed that one of the modules
> I was having issues with now has less arguments in my version of python,
> but I can't seem to fix the following error:
> 
> ***
> _mysqlmodule.c: In function ?_mysql_ConnectionObject_shutdown?:
> _mysqlmodule.c:1019: error: too few arguments to function
> ?mysql_shutdown?
> ***
> Should I just give up on MySQL-python-0.3.5 ? [...]

This release is almost 5 years old. Where did you dig it out from? ;-)

http://dustman.net/andy/python/MySQLdb_obsolete/0.3.5

"""
MySQLdb module 0.3.5
OBSOLETE Python Interface to MySQL

Stability: Perfect in every way

Released: 2001-03-25 00:00 UTC
Notes

NOTICE: This version works fine, but I strongly recommend 0.9.0 or 
newer, available from SourceForge.
"""

I'd try MySQLdb 1.2.0, which *might* work, according to its README:

"""
   * MySQL-5.0 and newer are not currently supported, but might work.

   * MaxDB, formerly known as SAP DB (and maybe Adabas D?), is a
     completely different animal. Use the sapdb.sql module that comes
     with MaxDB.
"""

-- Gerhard



From LittlePython at lost.com  Sun Feb 12 20:04:02 2006
From: LittlePython at lost.com (LittlePython)
Date: Mon, 13 Feb 2006 01:04:02 GMT
Subject: Python equivilant to msgbox()
References: <7CQHf.2690$7C3.1780@trnddc08> <43efd40a$1_2@newspeer2.tds.net>
Message-ID: <6WQHf.2700$7C3.2665@trnddc08>

That is exactly what I was look for .. thx


"Kent Johnson" <kent at kentsjohnson.com> wrote in message
news:43efd40a$1_2 at newspeer2.tds.net...
> LittlePython wrote:
> > Is there an equivalent to a msgbox() or wscript.echo (via wcsript) . I
> > would like to call this instead of print (to the screen) . I would like
> > to write a simple script that is not an event drive gui but calls input
> > boxes, message boxes, or maybe even a file open browser box as well?
>
> Take a look at EasyGUI:
> http://www.ferg.org/easygui/
>
> Kent




From g.brandl-nospam at gmx.net  Fri Feb 17 10:00:25 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Fri, 17 Feb 2006 16:00:25 +0100
Subject: embedding python in HTML
In-Reply-To: <gulJf.1641$No6.38356@news.tufts.edu>
References: <GD5Jf.1637$No6.38292@news.tufts.edu>
	<t6q9v1p2qcr0ntsau8i6q5glk89pfb4epq@4ax.com>
	<8n6Jf.1640$No6.38203@news.tufts.edu>
	<43f4f98e$0$16930$636a55ce@news.free.fr>
	<bpCdne1jK5jC1GjeRVn-gw@rcn.net> <43f569b6$1@nntp0.pdx.net>
	<gulJf.1641$No6.38356@news.tufts.edu>
Message-ID: <45m6o9F7eem2U1@individual.net>

John Salerno wrote:
> Kirk McDonald wrote:
> 
>> A more common (and bare-metal) approach is CGI. In CGI, a request for a 
>> page runs a script, the output of which is the HTML page. I think this 
>> only requires that the server has Python installed, which you have said 
>> is the case. Python has signifigant standard library support for writing 
>> CGI.
> 
> Thanks, that makes much more sense to me now. But does this mean I can 
> still write HTML normally? What would an example be of having HTML 
> within a Python script? I have a hard time picturing this, because I 
> imagine that most of my pages will be almost all HTML, with just a bit 
> of Python here and there, perhaps to insert headers and footers. Is all 
> the HTML just wrapped in a big print statement, or something like that?

When writing for CGI, it will be.

It will basically look like this:

#!/bin/env python

# these are custom headers, Content-type is mandatory
print "Content-Type: text/html"
# an empty line separates headers from content
print

print "<html>..."
# do stuff here
print "...</html>"

Georg


From dial#####$$NOSPAM##$#$##tone at gmail.com  Sun Feb 19 17:48:18 2006
From: dial#####$$NOSPAM##$#$##tone at gmail.com (Valentino Volonghi aka Dialtone)
Date: Sun, 19 Feb 2006 23:48:18 +0100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<pan.2006.02.19.21.43.25.100008@REMOVETHIScyber.com.au>
Message-ID: <1hb1607.1bxz5fw1e93nj3N%dial#####$$NOSPAM##$#$##tone@gmail.com>

Steven D'Aprano <steve at REMOVETHIScyber.com.au> wrote:

> By that logic, all languages are interpreted. What do you think happens to
> the machinecode?

Interpreted to transistors state by an internal mapping in the CPU
opcode ==> input configuration.

-- 
Valentino Volonghi aka Dialtone
Now Running MacOSX 10.4
Blog: http://vvolonghi.blogspot.com
New Pet: http://www.stiq.it


From pmartin at snakecard.com  Thu Feb 23 08:34:57 2006
From: pmartin at snakecard.com (Philippe Martin)
Date: Thu, 23 Feb 2006 07:34:57 -0600
Subject: catching  traceback.print_exc()
References: <tNiLf.410464$0l5.81514@dukeread06>
Message-ID: <5SiLf.410465$0l5.210042@dukeread06>

oops: 

"""
format_exc(  [limit[, file]])
This is like print_exc(limit) but returns a string instead of printing to a
file. New in version 2.4.
"""

Philippe Martin wrote:

> Hi,
> 
> Is there a way to catch  traceback.print_exc() output into a string ?
> 
> 
> Philippe



From LittlePython at lost.com  Thu Feb 16 20:59:29 2006
From: LittlePython at lost.com (LittlePython)
Date: Fri, 17 Feb 2006 01:59:29 GMT
Subject: Seaching Active Directory via ADO
References: <g_7Jf.33401$0H1.22606@trnddc04>
	<1140138661.484502.86380@f14g2000cwb.googlegroups.com>
Message-ID: <56aJf.78250$_D1.4370@trnddc03>

Thanks but I was looking more for ADO com object than ADSI or ldap.
For some strange reason it is very hard to locate any working scripts that
use ADO  to connect and search AD. Is there an issue with ADO and python
when connecting to AD?
I have try to build one myself with no luck. I think my problem is with
adodb.command calls.

Thanks for your response.

"alex23" <wuwei23 at gmail.com> wrote in message
news:1140138661.484502.86380 at f14g2000cwb.googlegroups.com...
> Heya,
>
> There are a couple of examples on the O'Reilly site. These two are
> taken from 'Active Directory Cookbook', the first uses a COM object
> while the second uses a native LDAP module:
>
>
http://www.rallenhome.com/books/adcookbook/src/18.6-rootdse_python_com.py.tx
t
>
http://www.rallenhome.com/books/adcookbook/src/18.6-rootdse_python_ldap.py.t
xt
>
> This might give you a start.
>
> - alex23
>




From gregory.petrosyan at gmail.com  Tue Feb 21 04:43:04 2006
From: gregory.petrosyan at gmail.com (Gregory Petrosyan)
Date: 21 Feb 2006 01:43:04 -0800
Subject: how to break a for loop?
In-Reply-To: <1140511606.355935.326890@f14g2000cwb.googlegroups.com>
References: <1140476451.649515.127230@g44g2000cwa.googlegroups.com>
	<1140487935.870851.271820@g43g2000cwa.googlegroups.com>
	<xhAKf.1202$PR2.30845@twister2.libero.it>
	<1140511606.355935.326890@f14g2000cwb.googlegroups.com>
Message-ID: <1140514984.419147.96260@z14g2000cwz.googlegroups.com>

Thanks to everybody for help. Python community is very friendly and
helpfull indeed!



From a.held at computer.org  Thu Feb 23 02:01:20 2006
From: a.held at computer.org (andreas)
Date: 22 Feb 2006 23:01:20 -0800
Subject: pyFltk-1.1
References: <1140617661.603681.12250@z14g2000cwz.googlegroups.com>
	<mailman.2322.1140651210.27775.python-list@python.org>
Message-ID: <1140678079.994118.38570@g43g2000cwa.googlegroups.com>

To put it simply, if you think Tkinter is not very easy/simple/fast/...
(fill in your favourite adjective here) then you might want to try
pyFltk. It basically helps you to build simple user interfaces from
Python.

Regards

Andreas Held
http://pyfltk.sourceforge.net



From aleaxit at yahoo.com  Thu Feb  2 11:03:27 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Thu, 2 Feb 2006 08:03:27 -0800
Subject: OO conventions
References: <mailman.1334.1138833641.27775.python-list@python.org>
	<pan.2006.02.02.11.08.33.964@REMOVETHIScyber.com.au>
	<1ha4cmm.7ho4df1vw3a19N%aleaxit@yahoo.com>
	<drt8gc$taq$1@wake.carmen.se>
Message-ID: <1ha4h06.l965711alvkwnN%aleaxit@yahoo.com>

Magnus Lycka <lycka at carmen.se> wrote:

> Alex Martelli wrote:
> > Steven D'Aprano <steve at REMOVETHIScyber.com.au> wrote:
> >>And now, at long last, the image object actually is an image. So why make
> >>this a two step process? Whatever the Image() initialization does, why
> >>can't it be done automatically when you read the file?
> > 
> > "Two-step construct" ("2SC") is a reasonably well-known and widely
> > useful idiom, and it can serve several kinds of purposes, many but not
> > all of which are tied to persistence. 
> 
> I've seen it used as a C++ coding standard when e.g. loading
> instances from databases (Person p=Person(); p.init(id);)
> since it was considered bad to have code in the constructor
> which could throw exceptions. If you make a new Person on
> the heap, and catch an exception from the constructor, are
> you sure that you delete the object?

Yes, this is a language-specific issue that applies to C++.  But I tried
to show that 2SC (and its counterpart, 2SD) can come in handy in many
other languages, too, including Python.


Alex


From localpricemaps at gmail.com  Fri Feb  3 19:01:57 2006
From: localpricemaps at gmail.com (localpricemaps at gmail.com)
Date: 3 Feb 2006 16:01:57 -0800
Subject: problems writing tuple to log file
In-Reply-To: <43e38edf$0$26572$636a55ce@news.free.fr>
References: <1138980476.469673.254090@g44g2000cwa.googlegroups.com>
	<43e38edf$0$26572$636a55ce@news.free.fr>
Message-ID: <1139010897.446693.276060@g44g2000cwa.googlegroups.com>

the, the issue is that the last loop adds the last value of everything
to the data array



From nnorwitz at gmail.com  Wed Feb  8 02:12:30 2006
From: nnorwitz at gmail.com (nnorwitz at gmail.com)
Date: 7 Feb 2006 23:12:30 -0800
Subject: Too Many if Statements?
In-Reply-To: <dsb95i$pld$1@xenon.Stanford.EDU>
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<dsaqkj$jhm$1@xenon.Stanford.EDU>
	<GU8Gf.22899$Jd.6095@newssvr25.news.prodigy.net>
	<dsb95i$pld$1@xenon.Stanford.EDU>
Message-ID: <1139382750.497926.248220@g43g2000cwa.googlegroups.com>

Alan Morgan wrote:
>
> generated (I'm ashamed to admit) by a perl script.  Is there any good reason why
> it is failing?  I'd prefer a "Too many silly walks in your program.  Reduce!" to
> a crash.

Everyone,

Please file a bug report anytime you make Python crash!

    http://sourceforge.net/tracker/?group_id=5470&atid=105470

If you aren't willing to deal with SF, at least send me source code
(not a description) that makes python crash.

n



From jeff at schwabcenter.com  Sat Feb 25 19:11:17 2006
From: jeff at schwabcenter.com (Jeffrey Schwab)
Date: Sun, 26 Feb 2006 00:11:17 GMT
Subject: spaces at ends of filenames or directory names on Win32
In-Reply-To: <4400D0A4.2000303@websafe.com>
References: <dtkuav$keb$1@solaris.cc.vt.edu> <43FE1B5E.8060009@websafe.com>
	<pan.2006.02.23.22.22.17.122779@REMOVETHIScyber.com.au>
	<U5adnSstztOb12PenZ2dnUVZ_sOdnZ2d@comcast.com>
	<hrsLf.21068$915.9031@southeast.rr.com>
	<4400D0A4.2000303@websafe.com>
Message-ID: <Fm6Mf.26517$915.13844@southeast.rr.com>

Larry Bates wrote:
> Jeffrey Schwab wrote:
> 
>>Larry Bates wrote:
>>
>>
>>>IMHO leading and/or trailing spaces in filenames is asking for
>>>incompatibilities with cross-platform file access.
>>
>>With what platforms specifically?
>>
>>
>>>Much like
>>>using single-quote in filenames which are perfectly legal in
>>>DOS/Windows, but Linux doesn't like much.
>>
>>Uh...  What Linux are you using?  And what FS?
>>
>>$ touch "'" && ls
>>'
>>$ rm "'"
>>$
> 
> 
> I stand corrected if you put double quotes around filenames
> it does work.  That to me means that single quotes
> in filenames are somehow "different" than other characters.
> You must handle these filenames differently (at least from
> the command line).  Thanks for pointing this out.

Sure, no problem.  FYI, the quotes are to keep my shell, which happens 
to be bash, from trying to interpret the quote.  If I were renaming a 
file by clicking the icon in a Windows-like GUI, or using a file 
manager, there would be no need for the quote.


From avharut at gmail.com  Wed Feb 15 06:42:30 2006
From: avharut at gmail.com (avharut at gmail.com)
Date: 15 Feb 2006 03:42:30 -0800
Subject: a numarray question
References: <1139995325.462403.126420@z14g2000cwz.googlegroups.com>
	<1139997836.535385.160000@f14g2000cwb.googlegroups.com>
Message-ID: <1140003750.403238.197240@f14g2000cwb.googlegroups.com>

thanks guys!

------------
import timeit
first_way = "the_array[the_array == 0] = 5.0"
second_way = "another_array = numarray.choose(the_array == 0,
(the_array, 5.0))"
some_third_way = """\
indx = numarray.where(the_array == 0)[0]
another_array = numarray.put(the_array, indx, len(indx) * [5.0,])
"""
initial_statements = 'import numarray; the_array =
numarray.array(int(1.0e6) * [1.0, 0.0])'
t1 = timeit.Timer(first_way, initial_statements)
t2 = timeit.Timer(second_way, initial_statements)
t3 = timeit.Timer(some_third_way, initial_statements)
print '1st way takes', round(t1.timeit(number=100) / 100, 4),
'seconds\n',\
       '2nd way takes', round(t2.timeit(number=100) / 100, 4),
'seconds\n',\
       '3rd way takes', round(t3.timeit(number=100) / 100, 4),
'seconds'
------------

the above written stuff printed like:

1st way takes 0.0624 seconds
2nd way takes 0.0948 seconds
3rd way takes 0.0641 seconds

no any other idea on how else one might do the replacement and the
difference among those three seems to be not very big, well, i expected
something bigger.

p.s. gonna use the first way =)



From fabioz at esss.com.br  Mon Feb  6 12:58:39 2006
From: fabioz at esss.com.br (Fabio Zadrozny)
Date: Mon, 06 Feb 2006 15:58:39 -0200
Subject: [ANN] Pydev Extended: Pydev Extensions 1.0 release
In-Reply-To: <434E801E.3010702@esss.com.br>
References: <43382E1F.3000600@esss.com.br> <434E801E.3010702@esss.com.br>
Message-ID: <43E78E4F.20703@esss.com.br>

Hi All,

Pydev Extensions 1.0 has been released

Check the homepage (http://www.fabioz.com/pydev/) for more details.

Pydev Extensions is a commercial product, and works with Eclipse and the 
Pydev "Open Source" version, and has features such as:

    * Code completion with auto-import
    * Code analysis (PyLint replacement, but much faster)
    * Quick-Fix for problems found in code analysis
    * Go to definition (Bycicle Repair Man replacement, but much more 
reliable)
    * Debug server (allows debugging scripts not lauched from within 
Eclipse)
    * Keywords presented as auto-completions as you type
    * Quick-outline


Cheers,

Fabio

-- 
Fabio Zadrozny
------------------------------------------------------
Software Developer

ESSS - Engineering Simulation and Scientific Software
www.esss.com.br

PyDev - Python Development Enviroment for Eclipse
pydev.sf.net
pydev.blogspot.com





From webraviteja at gmail.com  Sat Feb  4 09:07:58 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 4 Feb 2006 06:07:58 -0800
Subject: Graphical introspection utilities?
In-Reply-To: <9nCP$o$FciB@jens-theisen.de>
References: <9nCP$o$FciB@jens-theisen.de>
Message-ID: <1139062078.561466.162170@z14g2000cwz.googlegroups.com>

> as it would be so obviously a good thing to have a graphical (or maybe
> curses-base) browser through the dynamic state of a Python program, it's
> probably there.
>
> Can someone point me to something?

If you mean graphical debuggers, most Python specific IDEs have them.

Few examples ..
PythonWin
SPE
PyDev
WingIDE
Komodo

http://pydev.sourceforge.net/images/screenshot/screenshot6.gif
http://www.activestate.com/_images/screenshots/ss_Komodo_rails_large.gif

If it is something else that you want, give an example of something
similar available for another language/platform.



From michaeltaft at gmail.com  Tue Feb 28 20:05:32 2006
From: michaeltaft at gmail.com (mwt)
Date: 28 Feb 2006 17:05:32 -0800
Subject: Default Section Values in ConfigParser
Message-ID: <1141175132.554532.123560@t39g2000cwt.googlegroups.com>

I want to set default values for a ConfigParser. So far, its job is
very small, so there is only one section heading, ['Main']. Reading the
docs, I see that in order to set default values in a ConfigParser, you
initialize it with a dictionary or defaults. However, I'm not quite
sure of the syntax to add the section headings in to the dictionary of
defaults. For now, I'm doing it like this:

        default_values = {'username' : 'put username here',
                                'teamnumber': 'team number here',
                                'update_interval' : 'update interval'}
        self.INI = ConfigParser.ConfigParser(default_values)
        self.INI.add_section('Main')

This works, but clearly won't last beyond the adding of a second
section. What is the correct way to initialize it with a full
dictionary of defaults, including section names? 

Thanks.



From aleaxit at yahoo.com  Sat Feb 25 09:57:24 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sat, 25 Feb 2006 06:57:24 -0800
Subject: Is Python a Zen language?
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
Message-ID: <1hbazbd.y2orw21xrsqyN%aleaxit@yahoo.com>

Mu.


From hinnc at yahoo.com  Thu Feb  9 10:05:50 2006
From: hinnc at yahoo.com (slogging_away)
Date: 9 Feb 2006 07:05:50 -0800
Subject: Too Many if Statements?
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<dsaqkj$jhm$1@xenon.Stanford.EDU>
	<GU8Gf.22899$Jd.6095@newssvr25.news.prodigy.net>
	<dscc9e$4mg$1@oravannahka.helsinki.fi>
	<1139465234.569736.140420@f14g2000cwb.googlegroups.com>
Message-ID: <1139497550.368476.314060@f14g2000cwb.googlegroups.com>

Terry Reedy wrote:

> The OP did not specify whether all of his if-tests were sequential as in
> your test or if some were nested.  I vaguely remember there being an indent
> limit (40??).

Most of the if statements are nested.  Almost all of them fall under a
central 'for xxx in range(x,x,x)', (this is the statement that checks
thorugh each of the saved configuration files).   Under that 'for'
statment are the bulk of the 'if' statements - some nested and some not
- some also fall under other 'for' statements.  The indent level does
not exceed 10..

Delaney, Timothy (Tim) wrote:

> I'm pretty sure the OP has hit the python script line limit (32767?).

The script is 4903 lines long.

Slightly off topic; I am just a Network Engineer that can write some
code that accomplishes what I need to get done.  I'm learning something
new everyday but I am really blown away by the responses to this
thread.  I could not buy support this good.  Thanks for your responses.



From mtobis at gmail.com  Tue Feb 14 12:13:47 2006
From: mtobis at gmail.com (Michael Tobis)
Date: 14 Feb 2006 09:13:47 -0800
Subject: Python advocacy in scientific computation
Message-ID: <1139937227.379829.215090@z14g2000cwz.googlegroups.com>

Someone asked me to write a brief essay regarding the value-add
proposition for Python in the Fortran community. Slightly modified to
remove a few climatology-related specifics, here it is.

I would welcome comments and corrections, and would be happy to
contribute some version of this to the Python website if it is of
interest.

===

The established use of Fortran in continuum models such as climate
models has some benefits, including very high performance and
flexibility in dealing with regular arrays, backward compatibility with
the existing code base, and the familiarity with the language among the
modeling community. Fortran 90 and later versions have taken many of
the lessons of object oriented programming and adapted them so that
logical separation of modules is supported, allowing for more effective
development of large systems. However, there are many purposes to which
Fortran is ill-suited which are increasingly part of the modeling
environment.

These include: source and version control and audit trails for runs,
build system management, test specification, deployment testing (across
multiple platforms), post-processing analysis, run-time and
asynchronous visualization, distributed control and ensemble
management. To achieve these goals, a combination of shell scripts,
specialized build tools, specialized applications written in several
object-oriented languages, and various web and network deployment
strategies have been deployed in an ad hoc manner. Not only has much
duplication of effort occurred, a great deal of struggling up the
learning curves of various technologies has been required as one need
or another has been addressed in various ad hoc ways.

A new need arises as the ambitions of physical modeling increase; this
is the rapid prototyping and testing of new model components. As the
number of possible configurations of a model increases, the expense and
difficulty of both unit testing and integration testing becomes more
demanding.

Fortunately, there is Python. Python is a very flexible language that
has captured the enthusiasm of commercial and scientific programmers
alike. The perception of Python programmers coming from almost any
other language is that they are suddenly dramatically several times
more productive than previously, in terms of functionality delivered
per unit of programmer time.

One slogan of the Python community is that the language "fits your
brain". Why this might be the case is an interesting question. There
are no startling computer science breakthroughs original to the
language, Rather, Python afficionados will claim that the language
combines the best features of such various languages as Lisp, Perl,
Java, and Matlab. Eschewing allegiance to a specific theory of how to
program, Python's design instead offers the best practices from many
other software cultures.

The synergies among these programming modes is in some ways harder  to
explain than to experience. The Python novice may nevertheless observe
that a single language can take the place of shell scripts, makefiles,
desktop computation environments, compiled languages to build GUIs, and
scripting languages to build web interfaces. In addition,  Python is
useful as a wrapper for Fortran modules, facilitating the
implementation of true test-driven design processes in Fortran models.

Another Python advocacy slogan is "batteries included". The point here
is that (in part because Python is dramatically easier to write than
other languages) there is a very broad range of very powerful standard
libraries that make many tasks which are difficult in other languages
astonishingly easy in Python. For instance, drawing upon the standard
libraries (no additional download required)  a portable webserver
(runnable on both Microsoft and Unix-based platforms) can be
implemented in seven lines of code. (See
http://effbot.org/librarybook/simplehttpserver.htm ) Installation of
pure python packages is also very easy, and installation of mixed
language products with a Python component is generally not
significantly harder than a comparable product with no Python
component.

Among the Python components and Python bindings of special interest to
scientists are the elegant and powerful matplotlib plotting package,
which began by emulating and now surpasses the plotting features of
Matlab, SWIG, which allows for runtime interoperability with various
languages, f2py which specifically interoperates with Fortran, NetCDF
libraries (which cope with NetCDF files with dramatically less fuss
than the standard C or Fortran bindings), statistics packages including
bindings to the R language,  linear algebra packages,  various
platform-specific and portable GUI libraries, genetic algorithms,
optimization libraries, and bindings for high performance differential
equation solvers (notably, using the Argonne National Laboratory
package PetSC). An especially interesting Python trick for runtime
visualization in models that were not designed to support it, pioneered
by David Beazley's SWILL, embeds a web server in your model code.

See especially http://starship.python.net/~hinsen/ScientificPython/ and
http://scipy.org as good starting points to learn about scientific uses
of Python.

mt



From mitsura at skynet.be  Fri Feb  3 10:56:23 2006
From: mitsura at skynet.be (mitsura at skynet.be)
Date: 3 Feb 2006 07:56:23 -0800
Subject: py2exe question
Message-ID: <1138982183.590870.52280@f14g2000cwb.googlegroups.com>

Hi,

I just installed py2exe to create a binary of my Python script.
However, py2exe does not seem to create a binary from my .py script.
This is what I have done:
I create a setup.py script:
"
# setup.py
from distutils.core import setup
import py2exe

setup(name="APP1", scripts=["C:\\Python24\\_APP1.py"],)
"

I then ran "python setup.py py2exe"
I see a lot of stuff scrolling on the screen. A 'built' directory is
created. At the end I get a message saying that I may or may not need
to include some DLL (all windows system DLLs). and that's it. No error
message but also no binary.

When I remove 'scripts=["C:\\Python24\\_APP1.py"]' from the setup.py
file, I  get exactly the same result. The same output, no error, no
binary.

Any idea what I am doing wrong here? Where should the compiled binary
go?

Any help much appreciated.

Kris



From claudio.grondi at freenet.de  Mon Feb 27 09:07:31 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Mon, 27 Feb 2006 15:07:31 +0100
Subject: How to do an 'inner join' with dictionaries
In-Reply-To: <1141047580.492771.97130@z34g2000cwc.googlegroups.com>
References: <1141047580.492771.97130@z34g2000cwc.googlegroups.com>
Message-ID: <dtv133$ou4$1@newsreader3.netcologne.de>

cyborg4 at walla.co.il wrote:
> Let's say I have two dictionaries:
> dict1 is  1:23,  2:76,  4:56
> dict2 is  23:A, 76:B,  56:C
> 
> How do I get a dictionary that is
> 1:A, 2:B, 4:C
> 
Just copy/paste the following source code to a file and run it:
<code>
sourceCodeToExecute = """
dict1 = {  1:23,    2:76,   4:56 }
dict2 = { 23:'A',  76:'B', 56:'C' }
# How do I get a dictionary that is
dict3 = {  1:'A',   2:'B',  4:'C' }

dict4 = {}
for key in dict1.keys():
   dict4[key] = dict2[dict1[key]]
#:for

print 'dict3 == dict4 is', dict3 == dict4
"""

print
print '  execution of following source code: '
print
print '"""',
print sourceCodeToExecute
print '"""'
print
print '  results in output of: '
print
exec(sourceCodeToExecute)
</code>

The core idea of an inner join:
   dict2[dict1[key]]


Hope this helps inspite of the fact there is some more complicated code 
involved, which I provided to show the beauty of Python from the point 
of view of my own style of writing 'tutorial-like' code which explains 
itself by its output.

Claudio


From kadeko at gmail.com  Mon Feb 27 06:36:09 2006
From: kadeko at gmail.com (looping)
Date: 27 Feb 2006 03:36:09 -0800
Subject: TypeError when subclassing 'list'
References: <1140992122.723907.263990@z34g2000cwc.googlegroups.com>
Message-ID: <1141040169.024104.24780@i40g2000cwc.googlegroups.com>

Gerard Flanagan wrote:
> Hello all
>
> Could anyone shed any light on the following Exception? The code which
> caused it is below.  Uncommenting the 'super' call in 'XmlNode' gives
> the same error. If I make XmlNode a subclass of 'object' rather than
> 'list' then the code will run.
>
> Thanks in advance.
>
> Exception:
>
> Traceback (most recent call last):
>   File "C:\Program
> Files\Python\Python24\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py",
> line 310, in RunScript
>     exec codeObject in __main__.__dict__
>   File "C:\Documents and Settings\Gerard\My
> Documents\Scripts\Python\XmlNode\XmlNode.py", line 5, in ?
>     class XmlNode(list):
> TypeError: Error when calling the metaclass bases
>     __init__() takes at most 2 arguments (4 given)
>
> Code:
>
> from elementtree.SimpleXMLWriter import XMLWriter
>
> class XmlNode(list):
>     tag = None
>     attrib = None
>     value = None
>     def __init__(self, tag, **attrib):
>         #super(list, self).__init__()
>         self.tag = tag
>         self.attrib = attrib
>
>     def __repr__(self):
>         return "<XmlNode %s at %x>" % (self.tag, id(self))
>
>     def write(self, writer):
>         writer.start(self.tag, self.attrib)
>         if self.value is not None:
>             writer.data(self.value)
> ##        for node in self:
> ##            node.write(writer)
>         writer.end()
>
> class HtmlElement(XmlNode):
>     def __init__(self, tag, value='', **attrib):
>         super(HtmlElement, self).__init__(tag=tag, **attrib)
>         self.value = value
>
> class li(HtmlElement):
>     def __init__(self, value=None, **attrib):
>         super(li, self).__init__(tag='li', **attrib)
>
> class ul(HtmlElement):
>     def __init__(self, **attrib):
>         super(ul, self).__init__(tag='ul', **attrib)
>
> if __name__ == '__main__':
>     from StringIO import StringIO
>
>     item = li('item')
>     items = ul()
>     #items.apppend(item)
>     out = StringIO()
>     writer = XMLWriter(out)
>     items.write(writer)
>     print
>     print out.getvalue()
>     out.close()

>         #super(list, self).__init__()
I think this line must be:
  super(XmlNode, self).__init__()

But just a guess...



From andrewfelch at gmail.com  Thu Feb 16 13:19:26 2006
From: andrewfelch at gmail.com (andrewfelch at gmail.com)
Date: 16 Feb 2006 10:19:26 -0800
Subject: Numarray - Using Integers Efficiently for Boolean Values
Message-ID: <1140113966.194419.303440@z14g2000cwz.googlegroups.com>

Below is the code to/from Boolean arrays and Unsigned integers.  On my
Pentium 4, functions such as "bitwise_and" are 32 times faster when run
on 32-bit integers instead of the entire-byte-consuming-Boolean.

Good luck all:-)

uint32Mask =
numarray.array([0x00000001,0x00000002,0x00000004,0x00000008, \

0x00000010,0x00000020,0x00000040,0x00000080, \

0x00000100,0x00000200,0x00000400,0x00000800, \

0x00001000,0x00002000,0x00004000,0x00008000, \

0x00010000,0x00020000,0x00040000,0x00080000, \

0x00100000,0x00200000,0x00400000,0x00800000, \

0x01000000,0x02000000,0x04000000,0x08000000, \

0x10000000,0x20000000,0x40000000,0x80000000], numarray.UInt32)
uint32MaskInner = numarray.copy.deepcopy(uint32Mask)
uint32MaskInner.shape = [32,1]
uint32MaskOuter = numarray.copy.deepcopy(uint32Mask)
uint32MaskOuter.shape = [1,32]

def BoolToUInt32(myArr):
    if myArr.size()%32 != 0:
        print "Size is: ", myArr.size()
    return
numarray.matrixmultiply(numarray.reshape(myArr,[myArr.size()/32,32]),uint32MaskInner).flat

def UInt32ToBool(myArr,destination=None):
    if destination == None:
        destination = numarray.zeros([myArr.size()*32],numarray.Bool)
        #return
numarray.bitwise_and(numarray.reshape(myArr,[myArr.size(),1]),uint32MaskOuter).flat
    #else:
    destination.shape = [myArr.size(),32]

numarray.bitwise_and(numarray.reshape(myArr,[myArr.size(),1]),uint32MaskOuter,destination)
    destination.shape = [destination.size()]
    return destination





Test of code:
>>> import numarray
>>> gram.UInt32ToBool(ni)
array([1, 0, 0, ..., 0, 0, 0], type=Bool)
>>> numarray.all(numarray.equal(n,gram.UInt32ToBool(gram.BoolToUInt32(n))))
1
>>> n
array([1, 0, 0, ..., 0, 0, 0], type=Bool)
>>> n.shape
(1024,)
>>> numarray.all(numarray.equal(n,gram.UInt32ToBool(gram.BoolToUInt32(n))))
1



From jemptymethod at gmail.com  Sat Feb 11 18:53:09 2006
From: jemptymethod at gmail.com (jemptymethod at gmail.com)
Date: 11 Feb 2006 15:53:09 -0800
Subject: evangelizing python
Message-ID: <1139701989.102496.67220@z14g2000cwz.googlegroups.com>

any k5'ers on here feel free to +1 the following pending article on k5:

http://www.kuro5hin.org/story/2006/2/11/1454/36403

if you're not a k5 but want a overview of the material before perhaps
creating a k5 account just to promote this article, it can be found
here:

http://htmatters.net/htm/1/2006/02/Why-Python-makes-sense-for-web-development.cfm



From jelleferinga at gmail.com  Tue Feb 21 05:53:32 2006
From: jelleferinga at gmail.com (jelle)
Date: 21 Feb 2006 02:53:32 -0800
Subject: CGAL bindings
Message-ID: <1140519212.295963.109120@g43g2000cwa.googlegroups.com>

Hi,

I'm wondering whether anyone is aware of efforts being made wrapping
the CGAL library?
It's a highly advanced computational geometry library, see cgal.org

-j

//any other computational geometry links appreciated...



From tzot at sil-tec.gr  Thu Feb 16 04:31:30 2006
From: tzot at sil-tec.gr (Christos Georgiou)
Date: Thu, 16 Feb 2006 11:31:30 +0200
Subject: Unexpected behaviour of getattr(obj, __dict__)
References: <pan.2006.02.14.11.36.28.723688@REMOVETHIScyber.com.au><1139919112.714167.203760@f14g2000cwb.googlegroups.com>
	<1139920307.858786.20310@g44g2000cwa.googlegroups.com>
	<mailman.1934.1139973882.27775.python-list@python.org>
Message-ID: <bou6v11k9kaoiuh25cifug9dfrs2jur9a0@4ax.com>

On Tue, 14 Feb 2006 22:24:12 -0500, rumours say that "Terry Reedy"
<tjreedy at udel.edu> might have written:

>>>>> id(Parrot.f) == id(Parrot.f)
>> True
>>>>> id(Parrot.__dict__) == id(Parrot.__dict__)
>> True
>
>A wrapper is created and passed to id() which returns an int object while 
>releasing the wrapper back to the free list.  Then another wrapper is 
>created in the same chunk of memory and passed to id, which returns an int 
>of the same value for comparison.  The language ref only guarantees 
>uniqueness of ids at any particular instant and allows reuse of ids of 
>deallocated objects.
>
>I half seriously think the lib ref entry for id() should have a warning 
>that naive use can mislead.

Actually, you more-or-less just wrote what could (I also think should) be
included in the docs.
-- 
TZOTZIOY, I speak England very best.
"Dear Paul,
please stop spamming us."
The Corinthians


From deets at nospam.web.de  Sat Feb  4 09:32:16 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 04 Feb 2006 15:32:16 +0100
Subject: A problem with some OO code.
In-Reply-To: <1139055710.688193.81000@z14g2000cwz.googlegroups.com>
References: <1139055710.688193.81000@z14g2000cwz.googlegroups.com>
Message-ID: <44js7gF2jkjnU1@uni-berlin.de>

> AttributeError: 'Obj' object has no attribute
> '_Object__ls_demanded_links'
> --------------------------------------------------
> 
> Perhaps I'll explain what's going on there. First, the objects' manager
> is created, and then also some objects are created. After doing that,
> the object called "objA" demands a new link to the other object, called
> "objB" (this is the line 81 in the error message above). As the result,
> the "demandNewLink" method of the object "objA" is called. This method
> calls the "_makeNewLink" method of the objects' manager, and this
> method calls the "_makeLinkSafe" method of the object, that demanded a
> new link. The last method, called "__makeNewLink" (so this is a
> so-called private method), is called then. This last method is supposed
> to check if the link was really demanded and then make it "safe" by
> placing the information about this link in the proper dictionary
> (__ls_existing_links).
> 
> All these methods are the methods of the Object class (defined in
> PyObject.py), not of the Obj class (defined in test.py). According to
> my knowledge about the OO programming Python should be able to realize,
> that the so-called private fields, that are being referred from these
> Object class methods, are the private fields of the *Obj class
> instance*, not of the *Object class one*.

I didn't find any place where you create your __ls_demanded_links-list. 
So - how do you expevct it to be found, __-semantics or not?

But I _did_ find a self.__ls_demandedLinks. So I guess you got confused 
in your variable names.


After changing that, I got some other errors.

So basically this boils down to some simple spelling errors. You migt 
want to think about using pychecker or pylint or both, and a 
auto-completion-capable editor like eric or (x)emacs.

Diez


From dickey at saltmine.radix.net  Wed Feb  8 19:02:54 2006
From: dickey at saltmine.radix.net (Thomas Dickey)
Date: Thu, 09 Feb 2006 00:02:54 -0000
Subject: Replacing curses
References: <mailman.1566.1139345769.27775.python-list@python.org>
	<43E9234B.6030108@v.loewis.de>
	<mailman.1588.1139372460.27775.python-list@python.org>
	<11uk55h47lruk18@corp.supernews.com>
	<mailman.1611.1139422272.27775.python-list@python.org>
	<11ukf0ci8d6ac64@corp.supernews.com>
Message-ID: <11ul1leleeajb0b@corp.supernews.com>

Grant Edwards <grante at visi.com> wrote:

> Depending on what you're tring to do, slang might be an option,

perhaps not - he's trying to use UTF-8.  I haven't seen any plausible
comment that indicates John Davis is interested in updating newt to
work with slang2 (though of course he's welcome to show the code ;-)

-- 
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net


From wmmeyer at gmail.com  Tue Feb 28 11:48:49 2006
From: wmmeyer at gmail.com (William Meyer)
Date: Tue, 28 Feb 2006 16:48:49 +0000 (UTC)
Subject: comple list slices
References: <mailman.2516.1141136527.27775.python-list@python.org>
	<1141143200.110570.51680@u72g2000cwu.googlegroups.com>
Message-ID: <loom.20060228T174258-163@post.gmane.org>

 <johnzenger <at> gmail.com> writes:

> 
> Python lets you iterate through a list using an integer index, too,
> although if you do so we will make fun of you.  You can accomplish it
> with a while loop, as in:
> 
> i = 0
> while i < len(rows):
>    if rows[i] == "This code looks like BASIC without the WEND, doesn't
> it?":


ahh, that would work. Yea its really ugly too. I will probably just use the
shandy.b's suggestion squirreled away in a method. I shouldnt even care, its
just one extra conditional per row





From lashkariNO at SPAMworldviz.com  Fri Feb  3 16:49:06 2006
From: lashkariNO at SPAMworldviz.com (Farshid Lashkari)
Date: Fri, 03 Feb 2006 13:49:06 -0800
Subject: Embedding Python into C/C++ applications
In-Reply-To: <43e35299$0$5001$db0fefd9@news.zen.co.uk>
References: <43e35299$0$5001$db0fefd9@news.zen.co.uk>
Message-ID: <YcQEf.2479$MJ.450@fed1read07>

John Dean wrote:
> Hi
> 
> Could somebody, please tell me where I can find information about embedding
> Python into a C/C++ application. The example in the docs is rather simple. I
> am looking for something a bit more complex and longer
> 

Are you looking for a specific kind of example? Here is a link to a two 
part tutorial on Code Project that might help you out:

http://www.codeproject.com/cpp/embedpython_1.asp
http://www.codeproject.com/cpp/embedpython_2.asp

-Farshid


From fuzzyman at gmail.com  Tue Feb  7 10:57:04 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 7 Feb 2006 07:57:04 -0800
Subject: Detecting line endings
In-Reply-To: <43e8bb1e.177822094@news.oz.net>
References: <1139236514.022464.319970@g14g2000cwa.googlegroups.com>
	<43e8bb1e.177822094@news.oz.net>
Message-ID: <1139327824.341779.243260@o13g2000cwo.googlegroups.com>


Bengt Richter wrote:
> On 6 Feb 2006 06:35:14 -0800, "Fuzzyman" <fuzzyman at gmail.com> wrote:
>
> >Hello all,
> >
> >I'm trying to detect line endings used in text files. I *might* be
> >decoding the files into unicode first (which may be encoded using
> >multi-byte encodings) - which is why I'm not letting Python handle the
> >line endings.
> >
> >Is the following safe and sane :
> >
> >text = open('test.txt', 'rb').read()
> >if encoding:
> >    text = text.decode(encoding)
> >ending = '\n' # default
> >if '\r\n' in text:
> >    text = text.replace('\r\n', '\n')
> >    ending = '\r\n'
> >elif '\n' in text:
> >    ending = '\n'
> >elif '\r' in text:
> >    text = text.replace('\r', '\n')
> >    ending = '\r'
> >
> >
> >My worry is that if '\n' *doesn't* signify a line break on the Mac,
> >then it may exist in the body of the text - and trigger ``ending =
> >'\n'`` prematurely ?
> >
> Are you guaranteed that text bodies don't contain escape or quoting
> mechanisms for binary data where it would be a mistake to convert
> or delete an '\r' ? (E.g., I think XML CDATA might be an example).
>

My personal use case is for reading config files in arbitrary encodings
(so it's not an issue).

How would Python handle opening such files when not in binary mode ?
That may be an  issue even on Linux - if you  open a windows file and
use splitlines does Python convert '\r\n' to '\n' ? (or does it leave
the extra '\r's in place, which is *different to the behaviour under
windows).

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml

> Regards,
> Bengt Richter



From jason at tishler.net  Tue Feb 14 06:51:48 2006
From: jason at tishler.net (Jason Tishler)
Date: Tue, 14 Feb 2006 06:51:48 -0500
Subject: Cygwin IDLE has no menu bar
In-Reply-To: <dsrle8$ecm$1@sea.gmane.org>
References: <dsrle8$ecm$1@sea.gmane.org>
Message-ID: <20060214115148.GA3636@tishler.net>

Steve,

On Mon, Feb 13, 2006 at 11:14:03PM -0500, Steve Holden wrote:
> I just wondered whether anyone has seen this problem:

Yes, this is a known problem:

    http://sf.net/tracker/?func=detail&atid=105470&aid=786827&group_id=5470

> and fixed it.

Unfortunately, no.

Jason

-- 
PGP/GPG Key: http://www.tishler.net/jason/pubkey.asc or key servers
Fingerprint: 7A73 1405 7F2B E669 C19D  8784 1AFD E4CC ECF4 8EF6


From roy at panix.com  Mon Feb 27 10:30:14 2006
From: roy at panix.com (Roy Smith)
Date: Mon, 27 Feb 2006 10:30:14 -0500
Subject: PEP 354 -- "in" operator?
Message-ID: <roy-99AF06.10301427022006@reader2.panix.com>

If I have an enum, how can I verify that it's a legal value?  Can I do:

Weekdays = enum('sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat')

def foo (day):
   if day not in Weekdays:
      raise ValueError


Also, do enums have __dict__ slots?  Can I do something like:

day = 'sun'
print Weekdays.__dict__[day]


From timw07 at gmail.com  Sat Feb 18 10:36:31 2006
From: timw07 at gmail.com (timw07 at gmail.com)
Date: 18 Feb 2006 07:36:31 -0800
Subject: 2-3 Tree Implementation
Message-ID: <1140276991.905189.161090@o13g2000cwo.googlegroups.com>

Hi Group:

I am looking for some reference material to implement a 2-3 Tree in
Python... Can anyone lead me in the right direction?

thanks..



From peter at engcorp.com  Sat Feb 11 19:43:30 2006
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 11 Feb 2006 19:43:30 -0500
Subject: Pyserial handobook
In-Reply-To: <1139704128.708641.315670@g44g2000cwa.googlegroups.com>
References: <1139655808.197478.64160@g43g2000cwa.googlegroups.com>	<11urs1b5gl93e1c@corp.supernews.com>
	<1139704128.708641.315670@g44g2000cwa.googlegroups.com>
Message-ID: <dsm0bk$kn1$1@sea.gmane.org>

Zarathustra wrote:
> I have just saw this site...
> There is no documetation, but only examples!

That's not true.  Just below the section entitled Examples (which merely 
refers to the repository, and doesn't include any examples at all!), 
there is a whole pile of documentation.

It's certainly adequate documentation for anyone experienced with serial 
ports to use pySerial to talk to one... though perhaps it's not worthy 
of the grand label "Handobook".

-Peter



From lee at ricis.com  Mon Feb  6 15:23:32 2006
From: lee at ricis.com (Lee Leahu)
Date: Mon, 6 Feb 2006 14:23:32 -0600
Subject: threads and memory
In-Reply-To: <ds8am6$61u$1@sea.gmane.org>
References: <mailman.1500.1139245971.27775.python-list@python.org>
	<c81fu1968nqolca5fon7kd3edica716rh3@4ax.com>
	<20060206124400.351bc0c8@tiger.ricis.com>
	<ds8am6$61u$1@sea.gmane.org>
Message-ID: <20060206142332.56d5959a@tiger.ricis.com>

Hi List,

> > I am running into a problem where asyncore is through a filedescriptor
> > error if I try to launch more that 1023 connections:
> > ------------------------------------
> > Traceback (most recent call last):
> >   File "./test.py", line 46, in ?
> >     asyncore.loop()
> >   File "/usr/lib/python2.4/asyncore.py", line 192, in loop
> >     poll_fun(timeout, map)
> >   File "/usr/lib/python2.4/asyncore.py", line 122, in poll
> >     r, w, e = select.select(r, w, e, timeout)
> > ValueError: filedescriptor out of range in select()
> > ------------------------------------
> >
> > Is there a limitation on the number of simultaneous connects that can
> > be made with asyncore ?
> 
> what does "ulimit -n" (max number of file descriptors) say on your machine?


As a normal user, I was limited to 1024.  But su'ing to root allows me to set this higher, like 8196.

This error occurs after setting it higher (which resolves the socket.err(24, "too many open files") problem).


> if you get a larger value, you can try passing use_poll=True to the
> asyncore.loop function.

I will give this a try.


> if use_poll doesn't work, you may have to rebuild Python's select
> module to support more handles.  see the comments at the top of
> Modules/selectmodule.c for details.

Thanks!

-- 
Lee Leahu                           RICIS, Inc.
Internet Technology Specialist      866-RICIS-77 Toll Free Voice (US)
lee at ricis.com                       708-444-2690 Voice (International)
http://www.ricis.com/               866-99-RICIS Toll Free Fax (US)
                                    708-444-2697 Fax (International)

RICIS, Inc. is a member of the Public Safety Alliance Group

This email and any attachments that are included in it have been scanned
for malicious or inappropriate content and are believed to be safe.




From kevin.bell at slcgov.com  Thu Feb 23 10:00:16 2006
From: kevin.bell at slcgov.com (Bell, Kevin)
Date: Thu, 23 Feb 2006 08:00:16 -0700
Subject: formatted string like--->  u'720 S'
Message-ID: <2387F0EED10A4545A840B231BBAAC72260818B@slcimail1.slcgov.com>

I'm building a dictionary from values a database and upon print the
dictionary I see key value pairs like this:

u'Briarcliff' : [u'2500 E'],
u'Shumway' : [ u'2600 E']

do I need to slice off the "u", or anything?  I know it has something to
do with unicode but I don't know how to treat it.


From luismgz at gmail.com  Sun Feb 12 08:31:28 2006
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 12 Feb 2006 05:31:28 -0800
Subject: Is python very slow compared to C
In-Reply-To: <pan.2006.02.12.01.03.10.918456@REMOVETHIScyber.com.au>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<pan.2006.02.12.01.03.10.918456@REMOVETHIScyber.com.au>
Message-ID: <1139751088.720150.80010@g43g2000cwa.googlegroups.com>


Steven D'Aprano wrote:
> What is slow? Slow compared to what? Would you prefer to spend three days
> writing a program that will run in twenty milliseconds, or three hours
> writing the same program which runs in eighty milliseconds? Is the
> computer's execution time more important than your development time? If
> the computer's time is more valuable than your time, then you should be
> writing in assembly language.
>
> Python helps you write shorter code with fewer bugs, much quicker, than C.
> If you discover a specific problem that runs too slow in Python, it is
> possible to write a C extension to solve that specific problem, while
> still having all the other advantages of Python.

You are right, we all know that, but I think the person who asked this
question doesn't want to hear a sales pitch. He asked a very specific
question regarding execution speed.



From marcus.tettmar at gmail.com  Fri Feb  3 04:58:37 2006
From: marcus.tettmar at gmail.com (marcus.tettmar at gmail.com)
Date: 3 Feb 2006 01:58:37 -0800
Subject: newbie - script works in PythonWin - fails from Python
Message-ID: <1138960717.927268.22640@g44g2000cwa.googlegroups.com>

Hi,

I have a script that runs fine when I run it from within PythonWin but
causes a WindowsError: Exception when I try to run it from the command
line using python.exe.  What is PythonWin doing differently?



From davidh at ilm.com  Wed Feb 15 14:17:16 2006
From: davidh at ilm.com (David Hirschfield)
Date: Wed, 15 Feb 2006 11:17:16 -0800
Subject: Question about xmlrpc and threading
Message-ID: <43F37E3C.1080804@ilm.com>

An xmlrpc client/server app I'm writing used to be super-simple, but now 
threading has gotten into the mix.

On the server side, threads are used to process requests from a queue as 
they come in.
On the client side, threads are used to wait on the results of requests 
to the server.

So the question is: how thread-safe is python xmlrpc? If the client 
makes a request of the server by calling:

result = server.doSomething()

and while that is waiting in the background thread to complete, the 
client calls another:

result = server.doSomethingElse()

will they interfere with each other? Right now I'm avoiding this problem 
by queueing up calls to the server to be processed sequentially in the 
background. But I'd prefer to allow requests to go in parallel. Should I 
just make a new connection to the server for each request?

Any advice appreciated,
-David

-- 
Presenting:
mediocre nebula.



From steven.bethard at gmail.com  Sun Feb  5 12:25:51 2006
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 05 Feb 2006 10:25:51 -0700
Subject: Back-end for python.org
In-Reply-To: <mailman.1435.1139151734.27775.python-list@python.org>
References: <c4qdnSebt6zPBCXeRVn-pQ@comcast.com>	<dpaa87$2oa$1@panix3.panix.com>	<LN2dnQMoFpiCWyfeRVn-sg@comcast.com>	<43C4E198.2080107@holdenweb.com>	<dqksuf$dlm$1@sea.gmane.org>	<43CE35E5.8000604@pollenation.net><dqmqcm$p34$1@sea.gmane.org>	<dqnht5$rfq$1@sea.gmane.org><dqnkr4$4ju$1@sea.gmane.org>	<43CF5FBF.5090901@pollenation.net><mailman.753.1137669022.27775.python-list@python.org><bbNzf.110402$km.42803@edtnps89>	<xcNzf.110403$km.2313@edtnps89>
	<mailman.1435.1139151734.27775.python-list@python.org>
Message-ID: <Y6adnWuRaa-AqHvenZ2dnUVZ_tydnZ2d@comcast.com>

Fredrik Lundh wrote:
>> <whisper>
>> If you build it, they will come.
>> </whisper>
> 
> http://pydotorg.dyndns.org:8000

Very cool.  I'd love to see something like this on the actual website...

Is the hope that in the real python.org version edits will show up 
immediately, as they do in your version?  Or that the edits will be 
visible in the preview pane[1] and that clicking "Save Changes" will 
basically be a patch submission?

[1] Currently, the style isn't the same in the preview pane, so if, for 
example, I add a "Sidebar:" section, I don't know if I've done it right 
until my edit is committed.  I don't know how hard it would be to fix 
this so that the preview pane looks just like the actual page...

STeVe


From darthbob88 at gmail.com  Fri Feb 24 17:08:22 2006
From: darthbob88 at gmail.com (darthbob88 at gmail.com)
Date: 24 Feb 2006 14:08:22 -0800
Subject: "Temporary" Variable
In-Reply-To: <eiDLf.21220$915.2746@southeast.rr.com>
References: <1140665472.203495.7570@g44g2000cwa.googlegroups.com>
	<43FD6645.3020201@REMOVEMEcyber.com.au>
	<1140725159.143882.202630@j33g2000cwa.googlegroups.com>
	<pan.2006.02.23.22.19.38.642977@REMOVETHIScyber.com.au>
	<ZmsLf.21067$915.1256@southeast.rr.com>
	<pan.2006.02.24.09.42.22.818116@REMOVETHIScyber.com.au>
	<eiDLf.21220$915.2746@southeast.rr.com>
Message-ID: <1140818902.428065.282110@j33g2000cwa.googlegroups.com>

Reply to all: I realize that naming a variable "spam" is not entirely
kosherized. It was originally named secret, but I renamed it in a fit
of whimsy. The language is named after Monty Python's Flying Circus, is
it not? Remember the Spam Sketch.
http://en.wikipedia.org/wiki/Spam_sketch
I thank you for finding the problem; I thought it might involve string
v int comparisons when Comrade D'Eprano's code went wonky. Many thanks,
and good luck to you.
PS: As for the inappropriate naming, the Swedes tried to sell their
vacuums under the motto "Nothing sucks like an Electrolux."



From steve at REMOVETHIScyber.com.au  Fri Feb 24 07:52:31 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 24 Feb 2006 23:52:31 +1100
Subject: A C-like if statement
References: <hp-dnY20cusOnGPeRVn-rg@nmt.edu> <dtl04p$5q2$1@reader2.panix.com>
	<sdadnS6nfNnbmmPeRVn-sw@nmt.edu>
	<pan.2006.02.23.22.14.53.56541@REMOVETHIScyber.com.au>
	<1140742149.011750.321530@z34g2000cwc.googlegroups.com>
	<pan.2006.02.24.09.58.32.497698@REMOVETHIScyber.com.au>
	<43feed58_3@newspeer2.tds.net>
Message-ID: <pan.2006.02.24.12.52.30.600248@REMOVETHIScyber.com.au>

On Fri, 24 Feb 2006 06:45:41 -0500, Kent Johnson wrote:

> Steven D'Aprano wrote:
>> Now that's a Python wart: using >>> for the prompt for interactive
>> sessions. It makes it ambiguous when posting code in email or newsgroups,
>> especially once the code gets quoted a few times.
> 
> So change it. My pythonstartup.py contains:
> 
> import sys
> sys.ps1 = ' >>> '
> sys.ps2 = ' ... '

Sure, I can change my prompt. And you can change yours. And Bob can change
his. And Freddy doesn't bother. And now we've all got different prompts,
and nobody knows what's what...

It is good to be able to set your own prompt when needed. But it is also
good to have a common default prompt. And it would be good for that common
default prompt to NOT clash with email quoting standards. Therefore that
the prompt actually does clash is a wart.

That's my opinion. Yours may differ.



-- 
Steven.



From girodt at gmail.com  Thu Feb 16 13:14:44 2006
From: girodt at gmail.com (Thomas Girod)
Date: 16 Feb 2006 10:14:44 -0800
Subject: multiple inheritance
In-Reply-To: <1140043267.445069.218370@g43g2000cwa.googlegroups.com>
References: <1140041977.692748.133570@g43g2000cwa.googlegroups.com>
	<1140043267.445069.218370@g43g2000cwa.googlegroups.com>
Message-ID: <1140113684.602019.284440@z14g2000cwz.googlegroups.com>

That's perfect. thanks.



From lashkariNO at SPAMworldviz.com  Thu Feb  2 19:30:24 2006
From: lashkariNO at SPAMworldviz.com (Farshid Lashkari)
Date: Thu, 02 Feb 2006 16:30:24 -0800
Subject: would it be feasable to write python DJing software
In-Reply-To: <1138925819.465108.181760@o13g2000cwo.googlegroups.com>
References: <1138925819.465108.181760@o13g2000cwo.googlegroups.com>
Message-ID: <auxEf.2409$MJ.1076@fed1read07>

Levi Campbell wrote:
> Hi, I'm thinking about writing a system for DJing in python, but I'm
> not sure if Python is fast enough to handle the realtime audio needed
> for DJing, could a guru shed some light on this subject and tell me if
> this is doable or if I'm out of my fscking mind?
> 

What do you mean by DJing? Queueing and playing audio files? If so, 
python should work fine. Check out the PyMedia library for 
playing/mixing audio with python.

-Farshid


From martin.witte at gmail.com  Sat Feb 18 11:13:32 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 18 Feb 2006 08:13:32 -0800
Subject: Photo Management Python Application
In-Reply-To: <mailman.2090.1140265814.27775.python-list@python.org>
References: <mailman.2090.1140265814.27775.python-list@python.org>
Message-ID: <1140279212.187113.56560@f14g2000cwb.googlegroups.com>

You can play around with Pil, http://effbot.org/imagingbook/

I found this as being the date for a picture

>>> import Image
>>> i = Image.open('/media/hda8/Pictures/Elvis/dscn0178.jpg')
>>> i._getexif()[36867]
'2006:02:18 14:07:55'
>>>



From rocky at panix.com  Tue Feb 28 18:31:21 2006
From: rocky at panix.com (R. Bernstein)
Date: 28 Feb 2006 18:31:21 -0500
Subject: ANN: Extended Python debugger 1.14
Message-ID: <wihpsl7ysae.fsf@panix3.panix.com>

Download from
http://sourceforge.net/project/showfiles.php?group_id=61395&package_id=175827

On-line documentation is at
http://bashdb.sourceforge.net/pydb/pydb/lib/index.html

Changes since 1.12
* Add MAN page (from Debian)
* Bump revision to 0.12 to 1.13 to be compatible with Debian pydb package.
* Improve set_trace(), post_mortem(), and pm()
* Document alternative invocation methods and how to call from a program.
* Break out cmds and bdb overrides into a separate module
* add optional count on "where"
* install in our own directory (e.g. site-packages/pydb)
  NOTE: REMOVE OLD PYDB INSTALLATIONS BEFORE INSTALLING THIS PYDB.
* As a result of the above add __init__.py to give package info.
* Don't rely on tabs settings. Remove all tabs in programs and use -t 
  to check that.
* Various bug fixes and documentation corrections
* Fix bugs in configuration management. Make distcheck works again
  (sometimes)


From per9000 at gmail.com  Fri Feb 24 09:10:31 2006
From: per9000 at gmail.com (per9000)
Date: 24 Feb 2006 06:10:31 -0800
Subject: problem(s) with import from parent dir: "from ../brave.py import
	sir_robin"
In-Reply-To: <mailman.2396.1140788093.27775.python-list@python.org>
References: <1140786637.451247.16210@e56g2000cwe.googlegroups.com>
	<mailman.2396.1140788093.27775.python-list@python.org>
Message-ID: <1140790231.071029.236550@i40g2000cwc.googlegroups.com>

Thanks,

I added an environment variable PYTHONPATH and added the holy folder
with my script in. Works just perfectly.

But still: is there a way around this? (It is a lot easier to add
"../../" in my code than make everyone else add this variable).

/per9000



From malvert at telenet.be  Sun Feb 12 14:42:59 2006
From: malvert at telenet.be (malv)
Date: 12 Feb 2006 11:42:59 -0800
Subject: Is python very slow compared to C
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
	<1139743205.985196.254330@g43g2000cwa.googlegroups.com>
	<mailman.1776.1139745557.27775.python-list@python.org>
	<1139747631.858424.145230@z14g2000cwz.googlegroups.com>
Message-ID: <1139773379.917693.263890@g14g2000cwa.googlegroups.com>

That's why Microsoft is bringing IronPython on board to have something
more decent available with .NET



From scott.daniels at acm.org  Fri Feb 24 10:54:39 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Fri, 24 Feb 2006 07:54:39 -0800
Subject: make a class instance from a string ?
In-Reply-To: <1140791847.321823.21630@i40g2000cwc.googlegroups.com>
References: <mailman.1955.1140018042.27775.python-announce-list@python.org>
	<mailman.2340.1140687820.27775.python-list@python.org>
	<1140791847.321823.21630@i40g2000cwc.googlegroups.com>
Message-ID: <43ff2a98$1@nntp0.pdx.net>

Mike Woodhouse wrote:
> Is there anything particularly bad with
>       obj = eval(classname + "()")
> It appears to work, but I'm a noobie so I could be missing something
> nasty, in which any edication would be gratefully received.

It is a little too indirect.  Usually wanting to use "eval" or "exec"
means your code is probably not properly structured (a "code smell").
You can pass classes around as values; you typically needn't work with
their names.  If the name comes from outside, a dictionary of names to
classes means you can re-implement your code without being tightly
coupled to your I/O formats.  If you still want to use the name
I'd go with:
         globals()[classname]()
over eval, but it is your code.

Here's a danger to think about:
Suppose your source of class names has:
     '__import__(os).system("delete critical.file")'
for a class name?


--Scott David Daniels
scott.daniels at acm.org


From larry.bates at websafe.com  Mon Feb 13 14:58:10 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Mon, 13 Feb 2006 13:58:10 -0600
Subject: Single-file executables
In-Reply-To: <daadb$43ee6b05$4275d90a$28181@FUSE.NET>
References: <daadb$43ee6b05$4275d90a$28181@FUSE.NET>
Message-ID: <Vq-dnRF0oO9CeW3eRVn-gw@comcast.com>

Kevin Walzer wrote:
> Which of the Windows/Unix package builders for Python applications is
> capable of creating single-file executables? I'm thinking of:
> 
> 1. py2exe
> 2. Mcmillan Installer/PyInstaller
> 3. cxfreeze
> 
> The apps I've seen created by py2exe aren't single-file at all, the
> install folder is full of files besides the main program. I'm looking
> for a solution that stuffs all libraries, scripts, and the Python
> runtime into one file.
> 

I use py2exe and Inno Installer and get to a single file installation
that way.  Inno creates setup.exe as a single file.  That file may
actually expand into several files upon installation (which is
typical as you want readme.txt, history.txt, other documentation,
maybe example .ini file, etc.).  IMHO the fact that py2exe doesn't
create a single exe is a non-problem.  What other Windows app when
installed only installs <progname>.exe and NO OTHER FILES.  Inno
solves the problem of only having a single .exe to DISTRIBUTE
which I think is the real goal.  Inno also lets you automate the
creation of desktop/quicklaunch/startbutton icons, insertion of
items into the registry, and a whole host of other "stuff" that
normally must be done to complete a proper installation.  With some
plug-ins, you can even have it get updates from a website (I have
not tested this, but I've read about it).

If you want to "obscure" your programs use the bundle option and
py2exe imbeds the .ZIP file inside the .EXE file (making it
somewhat harder to hack).

-Larry Bates


From jeff at schwabcenter.com  Sat Feb 18 15:33:09 2006
From: jeff at schwabcenter.com (Jeffrey Schwab)
Date: Sat, 18 Feb 2006 20:33:09 GMT
Subject: define loop statement?
In-Reply-To: <T4LJf.14256$915.10437@southeast.rr.com>
References: <lW4Jf.31559$3V4.8390@trnddc06>
	<T4LJf.14256$915.10437@southeast.rr.com>
Message-ID: <9wLJf.14287$915.2111@southeast.rr.com>

Jeffrey Schwab wrote:

> class Loop:
>     def __init__(self, n):
>         self.n = n
>     def __call__(self):
>         self.n = self.n - 1
>         return self.n != 0
> 
> 
> if __name__ == '__main__':
>     loop = Loop(10)
>     while loop:

Whoops.  Should be "while loop()".

>         print "OK"


From cam.ac.uk at mh391.invalid  Fri Feb 24 19:21:40 2006
From: cam.ac.uk at mh391.invalid (Michael Hoffman)
Date: Sat, 25 Feb 2006 00:21:40 +0000
Subject: python-list/python-dev quoting style
In-Reply-To: <dtnjdt$n9q$1@panix2.panix.com>
References: <dtml9t$367$1@gemini.csx.cam.ac.uk> <dtnjdt$n9q$1@panix2.panix.com>
Message-ID: <dto7um$ils$1@gemini.csx.cam.ac.uk>

[me]
>>Does anyone have a script to convert more conventional USENET quoting 
>>style... to the commonly used python-dev/python-list style...

[Aahz]
> Blech.  Stick with the standard Usenet quoting style for both!

I think this style is *much* clearer and cleaner. It does require a lot 
more hand editing though, although this encourages more judicious quoting.
-- 
Michael Hoffman


From graham.abbott at gmail.com  Wed Feb 15 17:16:46 2006
From: graham.abbott at gmail.com (Graham)
Date: 15 Feb 2006 14:16:46 -0800
Subject: Clearing the screen
In-Reply-To: <1140032710.313981.3940@g47g2000cwa.googlegroups.com>
References: <1139688262.046667.296940@g14g2000cwa.googlegroups.com>
	<1139735197.228877.71770@z14g2000cwz.googlegroups.com>
	<mailman.1799.1139784222.27775.python-list@python.org>
	<1139953968.011216.210560@g43g2000cwa.googlegroups.com>
	<oet5v1lf2t7i7qg463hnprj7ti0v4hmt4g@4ax.com>
	<1140032710.313981.3940@g47g2000cwa.googlegroups.com>
Message-ID: <1140041806.240813.202120@g44g2000cwa.googlegroups.com>

you could always use ANSI escape codes:

print "\\033[2J"

for a screen clear, or

print "\\022[2j \033[0;0H"

to clear and reset the way "os.system('clear')" would work.

check out http://www.termsys.demon.co.uk/vtansi.htm

Seems like all that mud programming came in handy after all.

Graham.



From mayyash at gmail.com  Mon Feb 20 05:55:42 2006
From: mayyash at gmail.com (fileexit)
Date: 20 Feb 2006 02:55:42 -0800
Subject: Regular expression gone mad
Message-ID: <1140432942.392985.148820@z14g2000cwz.googlegroups.com>

Hi,
Would someone please tell me what is going on here??!! Why does the
following code work

>>> a=r"Mem"
>>> pat = re.compile(a)
>>> m=pat.search(ProcMem, re.DOTALL)
>>> m
<_sre.SRE_Match object at 0xb7f7eaa0>
>>> m.group(0)
'Mem'


But this one does not!!! (Search finds nothing)

>>> a=r"MemT"
>>> pat = re.compile(a)
>>> m=pat.search(ProcMem, re.DOTALL)
>>> m


ProcMem contains:

>>> print ProcMem
MemTotal:      8247952 kB
MemFree:       5980920 kB
Buffers:        417044 kB
Cached:         703036 kB
SwapCached:          0 kB
Active:        1440136 kB
Inactive:       370668 kB
HighTotal:     7405512 kB
HighFree:      5977600 kB
LowTotal:       842440 kB
LowFree:          3320 kB
SwapTotal:     8339440 kB
SwapFree:      8339296 kB
Dirty:              96 kB
Writeback:           0 kB
Mapped:         786672 kB
Slab:           359208 kB
Committed_AS:  2453912 kB
PageTables:      24696 kB
VmallocTotal:   106488 kB
VmallocUsed:      8700 kB
VmallocChunk:    96708 kB
HugePages_Total:     0
HugePages_Free:      0
Hugepagesize:     2048 kB



From egbert.bouwman at hccnet.nl  Sun Feb 26 13:58:41 2006
From: egbert.bouwman at hccnet.nl (egbert)
Date: Sun, 26 Feb 2006 19:58:41 +0100
Subject: An isalpha() that accepts underscores as well
In-Reply-To: <cone.1140889811.930498.40672.5001@35st-server.simplicato.com>
References: <1140875695.053987.158710@t39g2000cwt.googlegroups.com>
	<cone.1140889811.930498.40672.5001@35st-server.simplicato.com>
Message-ID: <20060226185841.GA12002@hccnet.nl>

The string method isalpha() returns True when all characters in the
string are alphabetic. Unfortunately the underscore is not alphabetic.
A function that does what I need is:

def alfa_(w):
    return "".join(w.split("_")).isalpha()

but for the kind of strings that I have this is about ten times
slower than isalpha() sec. Any suggestions ?
Thanks.
-- 
Egbert Bouwman - Keizersgracht 197 II - 1016 DS  Amsterdam - 020 6257991
========================================================================


From roy at panix.com  Mon Feb 27 20:47:50 2006
From: roy at panix.com (Roy Smith)
Date: Mon, 27 Feb 2006 20:47:50 -0500
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>
	<873bi4z4w6.fsf@rose.polar.local>
Message-ID: <roy-F43986.20475027022006@reader2.panix.com>

In article <873bi4z4w6.fsf at rose.polar.local>,
 Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:

> I'll amend the specification so empty enumerations are not an
> error. (This will also remove the last remaining exception class from
> the specification, making it cleaner still. Good.)

And once you've done that, we can build an enum of all the exceptions which 
enums can raise :-)


From gregpinero at gmail.com  Fri Feb 17 16:10:31 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Fri, 17 Feb 2006 16:10:31 -0500
Subject: Add a month
In-Reply-To: <312cfe2b0602171308j2e6ed284t2c5dd2c130166db1@mail.gmail.com>
References: <1140173540.686250.205760@g44g2000cwa.googlegroups.com>
	<mailman.2046.1140175284.27775.python-list@python.org>
	<1140178539.803209.84960@g47g2000cwa.googlegroups.com>
	<312cfe2b0602171308j2e6ed284t2c5dd2c130166db1@mail.gmail.com>
Message-ID: <312cfe2b0602171310t59e5dc04ucfae760822e329d7@mail.gmail.com>

Actually, no wait, that's bad.  It doesn't increment the year.

Does anyone have a simple way to code this?

-Greg


On 2/17/06, Gregory Pi?ero <gregpinero at gmail.com> wrote:
> Here's how I do it:
>
> def monthify(anint):
>     if anint%12==0:return 12
>     else:return anint%12
>
> import datetime
> d=datetime.datetime.today()
> dplus1month=datetime.datetime(d.year,monthify(d.month+1),d.day)
>
> We need monthify because adding 1 to 12 is bad otherwise!
>
> -Greg
>
> On 17 Feb 2006 04:15:39 -0800, Paul Boddie <paul at boddie.org.uk> wrote:
> > Fredrik Lundh wrote:
> > >
> > > what do you expect d_new to be after the operation ?  if the answer
> > > is date(2006,3,17), what's date(2006,1,31) plus one month?
> >
> > February 31st, of course:
> >
> > http://sql-info.de/mysql/gotchas.html#1_14
> >
> > ;-)
> >
> > Paul
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
>
> --
> Gregory Pi?ero
> Chief Innovation Officer
> Blended Technologies
> (www.blendedtechnologies.com)
>


--
Gregory Pi?ero
Chief Innovation Officer
Blended Technologies
(www.blendedtechnologies.com)


From tjreedy at udel.edu  Tue Feb  7 17:51:27 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 7 Feb 2006 17:51:27 -0500
Subject: Too Many if Statements?
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com><dsaqkj$jhm$1@xenon.Stanford.EDU>
	<GU8Gf.22899$Jd.6095@newssvr25.news.prodigy.net>
Message-ID: <dsb89f$efp$1@sea.gmane.org>


"Bryan Olson" <fakeaddress at nowhere.org> wrote in message 
news:GU8Gf.22899$Jd.6095 at newssvr25.news.prodigy.net...
> I made a script with 100,000 if's, (code below) and it appears
> to work on a couple systems, including Python 2.4.2 on Win32-XP.
> So at first cut, it doesn't seem to be just the if-count that
> triggers the bug.

The OP did not specify whether all of his if-tests were sequential as in 
your test or if some were nested.  I vaguely remember there being an indent 
limit (40??).

tjr





From fredrik at pythonware.com  Wed Feb 15 07:16:19 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 15 Feb 2006 13:16:19 +0100
Subject: low level data types
References: <1140005257.773955.32860@g14g2000cwa.googlegroups.com>
Message-ID: <dsv62m$h3q$1@sea.gmane.org>

"dementrio" wrote:

> What I want to do is writing an interface to a C daemon which waits for
> stuff like unsigned ints on a socket. For example, I need to craft and
> decode data structures that look like this:
>
> 32-bit unsigned int MSG_LENGTH
> 32-bit unsigned int MSG_CODE
> 64-bit signed int DATA
> 32-bit length + utf-8 characters STRING_DATA
> etc.
>
> What's the right way to do this in Python?

http://docs.python.org/lib/module-struct.html

</F>





From ZeD.est.Deus at gmail.com  Wed Feb 15 05:20:13 2006
From: ZeD.est.Deus at gmail.com (ZeD)
Date: Wed, 15 Feb 2006 10:20:13 GMT
Subject: how to write a C-style for loop?
References: <gZednVPdAtumI2_eRVn-jw@rcn.net>
Message-ID: <xfDIf.178309$65.4923952@twister1.libero.it>

Ciao, John Salerno! Che stavi dicendo?

> for (int i = 0; i < 50; i += 5)
> 
> How would that go in Python, in the simplest and most efficient way?

i=0
while i<50:
    #...
    i+=5

about range()/xrange(): what if you want to traslate this c-loop?
for (int i=1; i<50; i*=2)

-- 
Evangelion e' la storia yaoi di un angelo che vuole portarsi a letto un
ragazzo che si intreccia con la storia di un maturo professionista con il
complesso delle lolite... fatte in casa.
                                                            -- Lennier, 2006



From agriff at tin.it  Tue Feb 21 02:28:31 2006
From: agriff at tin.it (Andrea Griffini)
Date: 20 Feb 2006 23:28:31 -0800
Subject: Augmented assignment
In-Reply-To: <dte88n$568$2@home.itg.ti.com>
References: <dte88n$568$2@home.itg.ti.com>
Message-ID: <1140506910.993581.151310@g44g2000cwa.googlegroups.com>

I think it heavily depends on what is "x". If x is bound to a mutable
x=x+1 and x+=1 can not only have different speed but indeed can do two
very unrelate things (the former probably binding to a new object, the
latter probably modifying the same object). For example consider what
happens with lists and [1] instead of 1...

>>> s = []
>>> t = s
>>> t = t + [1]
>>> t
[1]
>>> s
[]
>>> s2 = []
>>> t2 = s2
>>> t2 += [1]
>>> t2
[1]
>>> s2
[1]
>>>

Also if x is not a single name but a more convoluted expression with +=
that expression is evaluated once and even in this case there can be
differences in speed and not only in speed.



From aleaxit at yahoo.com  Mon Feb 20 11:30:26 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 20 Feb 2006 08:30:26 -0800
Subject: Modifying an instances dict to change attribute lookup
References: <1140450716.131017.165860@f14g2000cwb.googlegroups.com>
Message-ID: <1hb1u1x.wvnidcvhucp1N%aleaxit@yahoo.com>

jslowery at gmail.com <jslowery at gmail.com> wrote:
   ...
> c = C()
> c.x = 1
> assert c.__dict__.__getitem__('x') == c.x
> 
> Could someone please tell me why the first example using a customized
> dict does not perform as advertised?

Because Python's __getattribute__ is currently not EXACTLY as you
imagine it to be, but slightly different, say something like:
    dict.__getitem__(c, 'x')
at the crucial step rather than c.__getitem__.  More generally, when (on
any type or newstyle class -- oldstyle legacy classes are different) a
special method gets implicitly invoked, it's invoked on the type, not on
the instance (no per-instance overriding in this case); and, for speed,
many internal dict lookups do "dict.__getitem__(obj,name)" rather than
"type(obj).__getitem__(obj, name)".

The documented way to do what you want in Python is by overriding
__getattr__ (which gets called when other normal lookup procedures fail
and would, absent __getattr__, raise AttributeError), not by trying to
install as the __dict__ something whose type isn't exactly __dict__.
Other approaches may work, but they depend on implementation accidents
which are liable to change with every passing breeze.


Alex


From brandon.mcginty at gmail.com  Fri Feb  3 00:10:22 2006
From: brandon.mcginty at gmail.com (brandon.mcginty at gmail.com)
Date: Thu, 2 Feb 2006 22:10:22 -0700
Subject: Calling a string as a function.
Message-ID: <002601c62880$236e3d70$6400a8c0@D1FWTS61>

I'm completely new to python, so sorry for my ignorence.
How does one go about converting a string, for instants one received through
tcp, into something that can be called as a function?
I'm trying to have what the user sends to the computer through the network,
run as a function.
If the user sends "motd", the function motd will be run inside the script.
Thanks Much,
Brandon McGinty
Brandon.mcginty at gmail.com

-- 
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.375 / Virus Database: 267.15.0/248 - Release Date: 2/1/2006
 



From simon at titanic.co.uk  Fri Feb  3 12:35:18 2006
From: simon at titanic.co.uk (Simon Faulkner)
Date: Fri, 03 Feb 2006 17:35:18 +0000
Subject: Compiling
In-Reply-To: <43e392d1$0$31853$626a54ce@news.free.fr>
References: <mailman.1387.1138986082.27775.python-list@python.org>
	<43e392d1$0$31853$626a54ce@news.free.fr>
Message-ID: <43E39456.4070907@titanic.co.uk>

>>I love Python for it's ease and speed of development especially for the
>>"Programming Challenged" like me but why hasn't someone written a
>>compiler for Python?
> 
> 
> But there *is* a compiler for Python.
> http://www.python.org/doc/2.4.2/lib/module-compiler.html

ty Bruno, I must confes that I don't understand much of that chapter!

I will work harder... :-)




From davidworley at gmail.com  Mon Feb 13 21:24:37 2006
From: davidworley at gmail.com (Dave)
Date: 13 Feb 2006 18:24:37 -0800
Subject: Loop Backwards
Message-ID: <1139883877.323042.199040@o13g2000cwo.googlegroups.com>

This should be simple, but I can't get it:

How do you loop backwards through a list?

For example, in, say, Javascript:

for (var i  = list.length - 1; i >=0; i--) {
    do_stuff()
}

I mean, I could reverse the list, but I don't want to. I want it to
stay exactly the same, but I want to start at the end and end at the
beginning.

Thanks!

- Dave



From skip at pobox.com  Tue Feb  7 15:41:11 2006
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 7 Feb 2006 14:41:11 -0600
Subject: QOTW candidate...
In-Reply-To: <dsatnm$i8o$1@reader2.panix.com>
References: <mailman.1561.1139337813.27775.python-list@python.org>
	<dsatnm$i8o$1@reader2.panix.com>
Message-ID: <17385.1511.679909.886333@montanaro.dyndns.org>

>>>>> "Roy" == Roy Smith <roy at panix.com> writes:

    Roy> There is much about traditional OO which translates well to Python,
    Roy> but sometimes it is difficult to read a treatise on OO and tell
    Roy> which bits are "traditional OO" and which are "OO in C++/Java".

+1 QOTW...

Skip


From carsten at uniqsys.com  Wed Feb  8 14:04:30 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 08 Feb 2006 14:04:30 -0500
Subject: email questions
In-Reply-To: <DE414F3F-31D8-45E0-B87C-68812C8A616A@pacbell.net>
References: <FDD3FDB3-EF9C-4F85-9599-37AF617DED18@pacbell.net>
	<1139420846.28143.41.camel@dot.uniqsys.com>
	<DE414F3F-31D8-45E0-B87C-68812C8A616A@pacbell.net>
Message-ID: <1139425470.28143.48.camel@dot.uniqsys.com>

On Wed, 2006-02-08 at 13:49, Scott Frankel wrote:
> Seems I'm still having issues with syntax.
> 
>  From what I can tell from my mail client, my outgoing mail server  
> name is either
> 	
> 	mail.<ispname>.net

This is it.

> or
> 	mail.<ispname>.net:<myUsername>@<myDomain>.com

Not this.

> The former yields the same socket error on connect() that I reported  
> earlier.

Then you're doing something wrong. The line

s = smtplib.SMTP("mail.ispname.net") instantiates an SMTP instance and
connects it. Are you doing s.connect() afterwards? If yes, don't do
that, it'll try to connect to the local host, which is not an smtp
server.

If you want to separate instantiation and connection, do this:

s = smtplib.SMTP()
s.connect("mail.ispname.net")

-Carsten




From fakeaddress at nowhere.org  Sat Feb 25 13:31:33 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Sat, 25 Feb 2006 18:31:33 GMT
Subject: Is Python a Zen language?
In-Reply-To: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
Message-ID: <9o1Mf.39804$H71.16633@newssvr13.news.prodigy.com>

John Coleman wrote:
>    I have a rough classification of languages into 2 classes: Zen
> languages and tool languages. A tool language is a language that is,
> well, a *tool* for programming a computer. C is the prototypical tool
> language. Most languages in the Algol family are tool languages. Visual
> Basic and Java are also tool languages. On the other hand, a Zen
> language is a language which is purported to transform your way of
> thinking about programming. Lisp, Scheme, Forth, Smalltalk and (maybe)
> C++ are Zen languages.

I think that's a horrible classification. Every language is both.
"Transform your way of thinking" from what? There is no
distinguished canonical view of what a programming language looks
like, from which all others must be strange and wondrous
transformations.

Lisp and Forth are not tools for programming a computer? Of course
they are. Algol and Java don't transform people's thinking about
programming? Nonsense.


-- 
--Bryan


From claudio.grondi at freenet.de  Thu Feb 16 09:27:00 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Thu, 16 Feb 2006 15:27:00 +0100
Subject: ANN: FreeImagePy 1.2.2
In-Reply-To: <43f43ec3$0$29107$5fc30a8@news.tiscali.it>
References: <43f43ec3$0$29107$5fc30a8@news.tiscali.it>
Message-ID: <dt223q$s9n$1@newsreader3.netcologne.de>

Michele Petrazzo wrote:
> FreeImagePy 1.2.2 is available at freeimagepy.sf.net
> 
> What is?
>   It' a python wrapper for FreeImage, Open Source library for developers
>    who would like to support popular graphics image formats.
> 
> How work?
>   It use a binary freeimage library present on the system and ctypes.
> 
> Major changes from 1.2.0:
>  New convertToPil function:
>   i = FreeImagePy.Image("myImage.ext")
>   pil = i.convetToPil()
>  Some bugs solved
> 
> Michele Petrazzo

Knowing some details about PIL and as good as no details about 
FreeImage, I would like in this context to become enlightened by the 
answer to the question, when does it make sense to use FreeImage instead 
of PIL?
 From what I know up to now I can't see any use for FreeImage :-( .

Claudio


From tjreedy at udel.edu  Sun Feb 12 16:13:41 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 12 Feb 2006 16:13:41 -0500
Subject: python and webcam
References: <1139773485.698970.195320@z14g2000cwz.googlegroups.com>
Message-ID: <dso8e5$e73$1@sea.gmane.org>


"dfaber" <deusfaber at gmail.com> wrote in message 
news:1139773485.698970.195320 at z14g2000cwz.googlegroups.com...
> Hi,
> I have Logitech webcam and I need to grab images on Fedora Core 4 (not
> my favorite distro). Are there any python modules available for doing
> this? Any hints or suggestions would be welcome.

If is one of their ball cameras (or other shape)b with a USB connection, 
then I would expect that you access it through the TWAIN protocol.  (I 
don't know how to do that from python, but wish I did!).  If it is a truly 
web-ready camera with a built-in server and ethernet connection, then you 
access it via an http request to its inet address.





From sullivanz.pku at gmail.com  Sun Feb 19 02:09:03 2006
From: sullivanz.pku at gmail.com (Sullivan WxPyQtKinter)
Date: 18 Feb 2006 23:09:03 -0800
Subject: Any Tkinker based rich text widget?
In-Reply-To: <1140329900.341774.175600@f14g2000cwb.googlegroups.com>
References: <1140329900.341774.175600@f14g2000cwb.googlegroups.com>
Message-ID: <1140332943.107517.148350@g44g2000cwa.googlegroups.com>

In addiiton, I hope it directly support basic HTML grammar.

sullivanz.pku at gmail.com ???

> Hi all
> I am using the standard python GUI Tkinter as my program's main
> interface. Although I know wxPython has some widget to support rich
> text widget, but I do not have time to shift to wx---- series. Does
> anyone know any Tkinter based widget that support:
>
> 1. Blod, Italic, Underline and their combinations.
> 2. Several most commonly used fonts, like Times New Roman and Arial
> 3. Multiline text
> 4. Cross platform support. Available in Linux-RedHat and Mac OS series
> and Windows 2000 or above.
> 5.Image embedding. Support jpeg, gif, bmp. The more the better.
>
>
> and better support:
> Hyperlink, Text color, the more the better.
> 
> 
> Thank you so much for help!



From john.orlando at gmail.com  Fri Feb 10 11:34:43 2006
From: john.orlando at gmail.com (john.orlando at gmail.com)
Date: 10 Feb 2006 08:34:43 -0800
Subject: Simple Tkinter app works in Linux, not in Windows
References: <1139531183.792405.148600@o13g2000cwo.googlegroups.com>
	<dsgs5g$d4f$1@daisy.noc.ucla.edu>
	<1139546543.928446.283090@o13g2000cwo.googlegroups.com>
	<dsh752$ld3$1@daisy.noc.ucla.edu>
Message-ID: <1139589283.674728.14420@g44g2000cwa.googlegroups.com>


> There is a difference between the above code and your prior code, namely
> in that you have explicitly instantiated Tk and put your canvas into the
> "root" toplevel. Try this in idle where it was failing:

<snip>

Problem solved...I tried James' suggestion (explicitly instantiating
the root Tk window, and then running the mainloop() as suggested), but
it produced the same result i.e. no photo.  Ugghhhh...

I then looked REALLY closely at my code and noticed that my __init__
function was actually ___init___ (3 underscores instead of 2).  Thus, a
Frame object was being built, but the __init__ function wasn't getting
run.  So no image was ever getting added.  Silly underscores...or,
silly Python newbie  :-)  It now works under both Linux and Windoze
just fine.

I would have thought that having no __init__ function would flag an
error, but I guess this isn't necessary.  I thought about grabbing PDB
to debug, and I bet this would have shown the error immediately (i.e.,
it would never have called the function).  Being a newbie is such a
joy...

Thanks for the help,
John



From asma61 at dsl.pipex.com  Mon Feb  6 19:35:50 2006
From: asma61 at dsl.pipex.com (DaveM)
Date: Tue, 07 Feb 2006 00:35:50 +0000
Subject: Global variables, Classes, inheritance
References: <uc08u1p09gleqcbasarcg1714rir7t0vrs@4ax.com>
Message-ID: <jiqfu15grrgg5bnss0r3ltk2ce3mklnl17@4ax.com>

Thanks very much for the help to all who replied.
I'd completely missed the difference between:

class Foo:
   i = 12345

a = Foo()
b = Foo()

a.i = 678

and Foo.i = 678

Yeah, I know...

DaveM


From sbassi at gmail.com  Thu Feb 23 11:39:57 2006
From: sbassi at gmail.com (Sebastian Bassi)
Date: Thu, 23 Feb 2006 13:39:57 -0300
Subject: Detec nonascii in a string
In-Reply-To: <46648pF9aps6U1@uni-berlin.de>
References: <mailman.2354.1140708758.27775.python-list@python.org>
	<46648pF9aps6U1@uni-berlin.de>
Message-ID: <b43bf2080602230839n18c8255epa4fdc3514767c3e4@mail.gmail.com>

On 2/23/06, Diez B. Roggisch <deets at nospam.web.de> wrote:
> "???".decode("ascii")
> should do the trick -- you get an UnicodeError when there is anything ascii
> can't encode.

Thank you. This is good enought for me.
Best regards,
SB.

--
Bioinformatics news: http://www.bioinformatica.info
Lriser: http://www.linspire.com/lraiser_success.php?serial=318


From roy at panix.com  Wed Feb 22 17:51:25 2006
From: roy at panix.com (Roy Smith)
Date: Wed, 22 Feb 2006 17:51:25 -0500
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com>
	<mailman.2160.1140440898.27775.python-list@python.org>
	<1140454473.335788@jetspin.drizzle.com>
	<pan.2006.02.20.21.59.12.636908@REMOVETHIScyber.com.au>
	<1140490302.639049@jetspin.drizzle.com>
	<mailman.2231.1140532613.27775.python-list@python.org>
	<1140539404.440390.172350@g44g2000cwa.googlegroups.com>
	<4866bea60602210948x10bff91elbff376bc8ec116f8@mail.gmail.com>
	<mailman.2277.1140569863.27775.python-list@python.org>
Message-ID: <roy-320C26.17512522022006@reader2.panix.com>

Many people in this thread have said things like:
> Interpreted?  Compiled?  Scripting language?

Let me quote from the preface to "Programming Ruby: The Pragmatic 
Programmer's Guide" by David Thomas and Andrew Hunt (aka "the pickaxe 
book").

----------
In the old days, the distinction between languages was simple: they were 
either compiled, like C or Fortran, or interpreted, like BASIC.  Compiled 
languages gave you speed and low-level access; interpreted languages were 
higher-level but slower.

Times change, and things aren't that simple anymore.  Some language 
designers have taken to calling their creations "scripting languages."  By 
this, we guess they mean that their languages are interpreted and can be 
used to replace batch files and shell scripts, orchestrating the behavior 
of other programs and the underlying operating system.  Perl, TCL, and 
Python have all been called scripting languages.

What exactly *is* a scripting language?  Frankly we don't know if it's a 
distinction worth making.
----------

I've made several attempts to sound intelligent in this thread, and each 
time, I bailed out before hitting the Post button.  I keep coming back to 
the conclusion that Thomas and Hunt said it better than I possibly could.

BTW, if like Python and haven't looked at Ruby, it's worth a glance.  If 
Python can be called similar to Lisp, then Ruby is even more so.  I'm not 
fond of Ruby's perlesqe syntax, but I like many of the fundamental ideas.


From sam at nuevageorgia.com  Tue Feb 28 09:22:13 2006
From: sam at nuevageorgia.com (SamFeltus)
Date: 28 Feb 2006 06:22:13 -0800
Subject: Python and Flash
In-Reply-To: <slrne0824e.9s8.sybrenUSE@schuimige.unrealtower.org>
References: <1139230361.675896.241920@z14g2000cwz.googlegroups.com>
	<1139235297.903689.244030@z14g2000cwz.googlegroups.com>
	<1139407620.948877.5820@g14g2000cwa.googlegroups.com>
	<1141101898.725832.104260@e56g2000cwe.googlegroups.com>
	<1141102008.086764.24550@j33g2000cwa.googlegroups.com>
	<slrne0824e.9s8.sybrenUSE@schuimige.unrealtower.org>
Message-ID: <1141136533.215656.290800@i39g2000cwa.googlegroups.com>

I aint a professional coder, but a gardener.  However, the
Flash->JSON->Python technique works.  It is poorly coded, but it is IMO
a very simple way to integrate Flash and Python compared to the methods
normally suggested on the net.

The HTML is just some junk thrown up for people with lower tech
browsers without much thought or consideration.



From tjreedy at udel.edu  Fri Feb 10 14:59:43 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 10 Feb 2006 14:59:43 -0500
Subject: Too Many if Statements?
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com><6e2iu1hdb8fvlfkcuulloiiq1khlbhret1@4ax.com><1139517959.741090.28560@g14g2000cwa.googlegroups.com><dshvb4$jfn$1@wake.carmen.se>
	<1139583025.428875.225500@g14g2000cwa.googlegroups.com>
Message-ID: <dsirbd$alm$1@sea.gmane.org>


"slogging_away" <hinnc at yahoo.com> wrote in message 
news:1139583025.428875.225500 at g14g2000cwa.googlegroups.com...
> SystemError: com_backpatch: offset too large

This message is generated in the backpatch function in Python/compile.c in 
the source tree.  (See below: sorry, tab indents did not survive cut and 
paste operation.)  As the comment says, and the code shows, it patches in a 
2-byte jump offset.  The error is raised if the offset is not 0 after 
beinging divided by 256 twice (ie, by 65536).  This code is called from any 
function that compiles a construct that potentially jumps: for, while, 
if/elif, and short-circuiting logic expressions.

To me, this message indicates not a bug but a mismatch between code demand 
and interpreter capability.  The solution is to reduce the demand.  In the 
present case, changing

for line in file:
  <extra-long body>

to

def checkline(line):
  <extra-long body>
for line in file:
  checkline(line)

might be sufficient.  If not, break up the <extra-lone body> into multiple 
pieces.

Terry Jan Reedy

static void
com_backpatch(struct compiling *c, int anchor)
{
unsigned char *code = (unsigned char *) PyString_AS_STRING(c->c_code);
int target = c->c_nexti;
int dist;
int prev;
for (;;) {
/* Make the JUMP instruction at anchor point to target */
prev = code[anchor] + (code[anchor+1] << 8);
dist = target - (anchor+2);
code[anchor] = dist & 0xff;
dist >>= 8;
code[anchor+1] = dist;
dist >>= 8;
if (dist) {
com_error(c, PyExc_SystemError,
"com_backpatch: offset too large");
break;
}
if (!prev)
break;
anchor -= prev;
}
}






From lycka at carmen.se  Wed Feb 22 11:00:03 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 22 Feb 2006 17:00:03 +0100
Subject: define loop statement?
In-Reply-To: <%50Kf.1181$p13.791@trnddc08>
References: <lW4Jf.31559$3V4.8390@trnddc06>
	<mailman.2114.1140318344.27775.python-list@python.org>
	<%50Kf.1181$p13.791@trnddc08>
Message-ID: <dti1q5$vse$1@wake.carmen.se>

David Isaac wrote:

> PS Here's the motivation.  Python closely resembles pseudocode.  With
> a very little LaTeX hacking, it is often possible to write algorithms is
> Python that typeset as reasonable pseudocode.  A simple repetitive
> loop is a bit of a sticking point.

With slightly more LaTeX hacking or possibly Python hacking on your
script before passing it to LaTeX, you might just be able to change 
occurences of

for x in range(a, b):

to

for x in [a, b):

or whatever, and get away with plain vanilla Python
in your code...


From grante at visi.com  Tue Feb 28 23:35:38 2006
From: grante at visi.com (Grant Edwards)
Date: Wed, 01 Mar 2006 04:35:38 -0000
Subject: Use empty string for self
References: <1141170846.619246.163470@t39g2000cwt.googlegroups.com>
	<roy-6BE725.20225128022006@reader2.panix.com>
	<ybednUSSkt30g5jZnZ2dnUVZ_vidnZ2d@rcn.net>
Message-ID: <120a94q7qnhb97@corp.supernews.com>

On 2006-03-01, John Salerno <johnjsal at NOSPAMgmail.com> wrote:

>> Yes.  To death.  Executive summary: self is here to stay.
>
> A related thing I was wondering about was the use of 'self' in
> class methods as the first parameter.

It's not a related thing, it's the same thing.

> I understand that right now it is necessary, but is this
> something that the language itself requires,

Yes.  Sort of.  When declaring a function, you have to declare
all of the formal paramters.  For functions that are bound to
class instances as methods, the first formal parameter is the
object instance.  It's common practice to call that parameter
"self", but you can call it something else.

> or just the way it is implemented now?

No.

> It seems like a waste of typing

Typing is free.  At least compared to the costs of the rest of
the life-cycle of a software project.

> to always have to put self as the first parameter in every
> class method.

You could call that first parameter to class methods "s" if you
can't afford the three extra letters (I've got lots of extra
letters, and I can send you some if you like).  If you do call
it something other than self and somebody else ever has to
maintain your code, they'll be annoyed with you.

> Is there no way for it to be implied?

No.

-- 
Grant Edwards
grante at visi.com


From fuzzyman at gmail.com  Fri Feb  3 08:09:21 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 3 Feb 2006 05:09:21 -0800
Subject: Control if a input text is IP
In-Reply-To: <mailman.1369.1138922168.27775.python-list@python.org>
References: <fc5d4c490602021458l7665ce6u@mail.gmail.com>
	<mailman.1369.1138922168.27775.python-list@python.org>
Message-ID: <1138972161.096907.291780@g14g2000cwa.googlegroups.com>


Fredrik Lundh wrote:
> Sbaush wrote:
>
> > My app has in input an ip address in IPv4 notation.
> > is there a function that control if input is a string in IPv4 notation?
>
> here's one way to do it:

Here's a function from the 'validate' module that comes with ConfigObj
:

def dottedQuadToNum(ip):
    """
    Convert decimal dotted quad string to long integer

    >>> dottedQuadToNum('1 ')
    1L
    >>> dottedQuadToNum(' 1.2')
    16777218L
    >>> dottedQuadToNum(' 1.2.3 ')
    16908291L
    >>> dottedQuadToNum('1.2.3.4')
    16909060L
    >>> dottedQuadToNum('1.2.3. 4')
    Traceback (most recent call last):
    ValueError: Not a good dotted-quad IP: 1.2.3. 4
    >>> dottedQuadToNum('255.255.255.255')
    4294967295L
    >>> dottedQuadToNum('255.255.255.256')
    Traceback (most recent call last):
    ValueError: Not a good dotted-quad IP: 255.255.255.256
    """

    # import here to avoid it when ip_addr values are not used
    import socket, struct

    try:
        return struct.unpack('!L',
            socket.inet_aton(ip.strip()))[0]
    except socket.error:
        # bug in inet_aton, corrected in Python 2.3
        if ip.strip() == '255.255.255.255':
            return 0xFFFFFFFFL
        else:
            raise ValueError('Not a good dotted-quad IP: %s' % ip)
    return

All the best,


Fuzzyman
http://www.voidspace.org.uk/python/index.shtml



From steve at REMOVEMEcyber.com.au  Thu Feb 23 02:37:41 2006
From: steve at REMOVEMEcyber.com.au (Steven D'Aprano)
Date: Thu, 23 Feb 2006 18:37:41 +1100
Subject: "Temporary" Variable
References: <1140665472.203495.7570@g44g2000cwa.googlegroups.com>
Message-ID: <43FD6645.3020201@REMOVEMEcyber.com.au>

darthbob88 at gmail.com wrote:

> Problem: I wish to run an infinite loop and initialize a variable on
> each iteration. Sort of like, "Enter Data", test it, "No good!", "Next
> Try?", test it, etc. What I've tried is simply while 1: var1 =
> raw_input, test var1, then run through the loop again. What results is
> var1 gets and keeps the first value it receives. 

Hmmm. I get a syntax error.

 >>> while 1:
...     var1 = raw_input
...     test var1
   File "<stdin>", line 3
     test var1
             ^
SyntaxError: invalid syntax

How about posting your actual code?

You could try this:

while 1:
     var = raw_input("Give me some data! ")
     if var == "some data":
         print "Success!"
         break
     else:
         print "No good, try again."



-- 
Steven.



From adelagon at gmail.com  Mon Feb 27 07:01:41 2006
From: adelagon at gmail.com (Alvin A. Delagon)
Date: Mon, 27 Feb 2006 12:01:41 +0000
Subject: Multi-Threading Practices
Message-ID: <4402EA25.3020203@gmail.com>

Greetings,

I was the last time who asked your opinion about Infinite Loops and 
crontab. I settled with crontab where in the python program selects a 
number of records from a mysql database and then releases Threads (which 
is actually CORBA clients) that report to a CORBA server, wait a 
response and mark the record as "done" if everything's working fine.

The crontab is scheduled to run every 1 minute. My question is this: Is 
there any way I could manage the number of threads to release? How can I 
kill a certain Thread if its inactive for sometime? Also I encountered 
some bottleneck problems on mysql. What's the best way to avoid these 
problems? Thanks in advance and more power to python! :-)


From jsuch at dsic.upv.es  Thu Feb  9 06:26:26 2006
From: jsuch at dsic.upv.es (jsuch)
Date: 9 Feb 2006 03:26:26 -0800
Subject: thread dump
Message-ID: <1139484386.059484.165210@f14g2000cwb.googlegroups.com>

I'm using Fedora core 3 and python 2.4.2, is there any way to obtain
the linux pid of a python thread? I need it because I want to know CPU
usage per thread.


Thanks



From claudio.grondi at freenet.de  Sat Feb 18 10:19:14 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Sat, 18 Feb 2006 16:19:14 +0100
Subject: Difference between CPython, Python for .NET and IronPython?
In-Reply-To: <pGGJf.5441$zc1.999@amstwist00>
References: <pGGJf.5441$zc1.999@amstwist00>
Message-ID: <dt7dtj$hio$1@newsreader3.netcologne.de>

Carl Johan Rehn wrote:
> What is the difference between CPython, Python for .NET, and IronPython?
> 
> For example, if I'm running IronPython, can I access modules such as Numeric
> and numarray?
>  
> As I understand it, interoperability with C# and .NET works in both
> directions with IronPython, but CPython modules cannot be imported, or? 
> 
> With Python for .NET I can import the .NET Framework and continue using
> CPython modules, or?
> 
> What is the roadmap for IronPython, will it be possible to import CPython
> modules in the near future?
> 
> One last question, is IronPython cross-platform. That is, can I use
> IronPython with Mono?
> 
> Carl
I have asked similar 'question' some weeks ago in the German Python 
newsgroup.
It seems, that that Pythonistas have generally not much interest in 
IronPython waiting for at least release 2.0 of it which is _perhaps_ 
expected to support Mono.
It seems, that usage of IronPython is currently limited to Windows 
platform, but I was not able to attract any expert on it to give a clear 
answer to that.
My own short test has shown, that compiled DLLs (extension modules) 
don't work in IronPython and the created .exe-s of simple Python scripts 
fail to run.
Curious to hear if there will be any expert response to your posting 
here (except replies from people like me, who have no idea about the 
subject themselves).

Claudio


From cdkrug at aol.com  Sat Feb 11 08:48:55 2006
From: cdkrug at aol.com (Charles Krug)
Date: Sat, 11 Feb 2006 07:48:55 -0600
Subject: is there a better way?
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
	<1hakfjo.j6t8d31cslz6tN%aleaxit@yahoo.com>
Message-ID: <aYidnQk9BPTadnDeRVn-pQ@comcast.com>

On 2006-02-11, Alex Martelli <aleaxit at yahoo.com> wrote:
> markscala at gmail.com <markscala at gmail.com> wrote:
>
>> Problem:
>> 
>> You have a list of unknown length, such as this: list =
>> [X,X,X,O,O,O,O].  You want to extract all and only the X's.  You know
>> the X's are all up front and you know that the item after the last X is
>> an O, or that the list ends with an X.  There are never O's between
>> X's.
>
> If the list is incredibly long, you should use a bisection approach.
> Standard module bisect in the Python library could help, but mostly as
> an _example_, since it unfortunately relies on normal alphabetic order,
> and alphabetically speaking X should come _after_ O, not _before_.
>

Isn't every call to list.index() an O(n) operation?  We certainly want
to avoid multiple calls there if we can.

What happens if your split occurs in the middle of your block of Xs?
Then the split before/after fails --the stated algorithm says, "If the
split is an X, choose the front half," so perhaps the statement was
inprecise?

The only way you'll know if you have an X in a particular block is using
a linear search method, either in Python or with list.index()

If (as the OP seemed to state) we KNOW that there's only one block of
X's in the list:

1. Find the index of the first X
2. Find the index of the last X.
3. Delete the block we've found.

That relies on the underlying language, which means we're working in
"Linear Time in C", more or less.

If we make no such guarantee, then I can do the operation in linear
"Python Time" by scanning the list once, finding each instance and
calling list.del() as I find each block, keeping track of my current
position so I don't have to start over again.

Judging from way the OP worded the question, I'd advise making something
that works and that you understand how it works.

After that, s/he can worry about whether or not its performance is
suboptimal.

How large must the list be before "logarithmic Python algorithm" is
faster than "linear C algorithm"?  I've never measured, but it may be a
question worth exploring if one has a huge pile of data to chew on--like
US Census or UN budget-sized.






From blair.houghton at gmail.com  Sun Feb  5 03:37:50 2006
From: blair.houghton at gmail.com (Blair P. Houghton)
Date: 5 Feb 2006 00:37:50 -0800
Subject: Does Python support a peek like method for its file objects?
References: <4s3bu1p178o46hh0jcj0eld5git5paog4q@4ax.com>
	<pan.2006.02.05.08.25.20.749932@REMOVETHIScyber.com.au>
	<pan.2006.02.05.08.30.06.149080@REMOVETHIScyber.com.au>
Message-ID: <1139128670.581142.147780@f14g2000cwb.googlegroups.com>

Here's a version that should work in text mode as well:

fp = file("some file on disk", "r")
b = ""
while 1:
    p = fp.tell()
    # peek at the next byte; moves file position only if a byte is read
    c = fp.read(1)
    # decide whether to read it
    if c == "?":
        # pretend we never read the byte
        fp.seek(p)
        break
    # now read the byte "for real"
    b = c
    if not b:
        # we've reached the end of the file
        break
fp.close() 

--Blair



From lycka at carmen.se  Thu Feb 23 05:32:09 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 23 Feb 2006 11:32:09 +0100
Subject: a little more help with python server-side scripting
In-Reply-To: <Lc0Lf.1652$No6.38850@news.tufts.edu>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<Lc0Lf.1652$No6.38850@news.tufts.edu>
Message-ID: <dtk2v9$j3c$1@wake.carmen.se>

John Salerno wrote:
> The python installation on our windows hosting is not configured as 
> mod_python. 

Perhaps you can switch to linux hosting instead?
If they have mod_python in that environment, you
can use Python Server Pages, and whatever tools
you use, there is much better support for Apache
than for IIS in Python (and many other) web
development tools. After all, Apache has almost 70%
of the web server share, and IIS has about 20%...
http://news.netcraft.com/archives/web_server_survey.html

For mod_python's PSP support, see
http://www.modpython.org/live/current/doc-html/pyapi-psp.html


From electronicmailfixtosend at telus.net  Sat Feb 11 02:51:37 2006
From: electronicmailfixtosend at telus.net (Bock)
Date: Sat, 11 Feb 2006 07:51:37 GMT
Subject: test
Message-ID: <43ED9894.9C1E09EE@telus.net>

test comp.lang.python


From kent at kentsjohnson.com  Mon Feb 13 16:05:57 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Mon, 13 Feb 2006 16:05:57 -0500
Subject: Jython socket typecasting problems
In-Reply-To: <1139857815.855155.58400@g43g2000cwa.googlegroups.com>
References: <1139678202.221563.308700@f14g2000cwb.googlegroups.com>
	<456l92F554abU1@uni-berlin.de>
	<mailman.1803.1139803276.27775.python-list@python.org>
	<1139857815.855155.58400@g43g2000cwa.googlegroups.com>
Message-ID: <43f0f05d$1_2@newspeer2.tds.net>

Mark Fink wrote:
> I added the two print lines as recommended:
>         self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>         print type(self.host), repr(self.host)
>         print type(self.port), repr(self.port)
>         self.socket.connect((self.host, self.port))
>         self.socketOutput = self.socket.getOutputStream()
> 
> And more specific information:
> D:\AUT_TEST\workspace\JyFIT\fit>jython JyFitServer2.py 127.0.0.1 1234
> 12
> ['JyFitServer2.py', '127.0.0.1', '1234', '12']
> 127.0.0.1
> org.python.core.PyString '127.0.0.1'
> org.python.core.PyString '1234'
> Traceback (innermost last):
>   File "JyFitServer2.py", line 148, in ?
>   File "JyFitServer2.py", line 31, in run
>   File "JyFitServer2.py", line 98, in establishConnection
>   File "D:\AUT_TEST\Jython21\Lib\socket.py", line 135, in connect
> TypeError: java.net.Socket(): 1st arg can't be coerced to
> java.net.InetAddress or String
> 
> No casting from string to string?? I learned that there is no such
> thing as explicit typecasting. What to do?

The problem is that the second arg is not an int. The second problem is 
that the error message errorneously points to the first arg. See my 
earlier post.

Kent


From ivoras at fer.hr  Sun Feb  5 20:29:45 2006
From: ivoras at fer.hr (Ivan Voras)
Date: Mon, 06 Feb 2006 02:29:45 +0100
Subject: Thread imbalance
In-Reply-To: <5mvFf.242125$V7.59456@news-server.bigpond.net.au>
References: <1138912272.382474.13170@g44g2000cwa.googlegroups.com>	<ds3d35$mo6$2@bagan.srce.hr>
	<mailman.1427.1139097680.27775.python-list@python.org>
	<ds55tb$n00$1@bagan.srce.hr>
	<5mvFf.242125$V7.59456@news-server.bigpond.net.au>
Message-ID: <ds68rt$iad$1@bagan.srce.hr>

Neil Hodgson wrote:

>    Lua has coroutines rather than threads. It can cooperate with 
> threading implemented by a host application or library.

I mentioned it because, as far as I know the Lua's intepreter doesn't do 
implicit locking on its own, and if I want to run several threads of 
pure Lua code, it's possible if I take care of data sharing and 
synchronization myself.


From claird at lairds.us  Wed Feb 22 13:08:34 2006
From: claird at lairds.us (Cameron Laird)
Date: Wed, 22 Feb 2006 18:08:34 GMT
Subject: Tkinter canvas size determination
References: <43FC9532.2050800@rpcl.com>
Message-ID: <lvjuc3-ph7.ln1@lairds.us>

In article <43FC9532.2050800 at rpcl.com>,
Dean Allen Provins  <dprovins at rpcl.com> wrote:
>I need to determine the size of a canvas while the process is running.
>Does anyone know of a technique that will let me do that?
			.
			.
			.
Does
  >>> import Tkinter
  >>> c = Tkinter.Canvas()
  >>> c.create_oval(13, 51, 80, 130)
  1
  >>> c.pack()
  >>> print c.cget("width")
  284
help?

There are actually several different notions of the size of a
canvas.  The example abovve should be a good starting point,
though.  

There's also a mailing list specifically for Tkinter <URL:
http://tkinter.unpythonic.net/wiki/mailing_20lists  >; that
might interest you.


From flashkNO at SPAMgmail.com  Fri Feb 17 02:10:42 2006
From: flashkNO at SPAMgmail.com (Farshid Lashkari)
Date: Thu, 16 Feb 2006 23:10:42 -0800
Subject: file.read problem
In-Reply-To: <1140159632.758960.318580@g44g2000cwa.googlegroups.com>
References: <1140158220.388409.87650@g47g2000cwa.googlegroups.com>
	<BieJf.15428$MJ.2728@fed1read07>
	<1140159632.758960.318580@g44g2000cwa.googlegroups.com>
Message-ID: <eFeJf.15429$MJ.7709@fed1read07>

> I am working on a script to get parts of raw data out of a file, and
> the data I read has to be the data written in the file without CR or
> LF.

So you just want to remove all the linefeeds? This should work then:

data = data.replace('\n','')

-Farshid



From michele.simionato at gmail.com  Tue Feb 21 11:00:03 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 21 Feb 2006 08:00:03 -0800
Subject: Zope/Plone - Is it the right solution?
In-Reply-To: <1140532818.195281.316580@g44g2000cwa.googlegroups.com>
References: <1140532818.195281.316580@g44g2000cwa.googlegroups.com>
Message-ID: <1140537603.392927.207650@f14g2000cwb.googlegroups.com>

It depends on how much time do you want to spend fighting with the
framework.
I usually do not recommend Zope, unless you want to make a career as a
Zope
consultant. If you have to interact with a relational database, your
life with Zope
may be hard: http://www.jrandolph.com/blog/?p=23

For easy of use nothing beats CherryPy, but I am not sure how stable it
is.
Quixote is nice and small, and pretty easy to use too.
Many likes Django and TurboGears.

Zope and Twisted are for people who have a lot of time to invest.

      Michele Simionato



From chimalus at gmail.com  Wed Feb  1 21:02:18 2006
From: chimalus at gmail.com (jd)
Date: 1 Feb 2006 18:02:18 -0800
Subject: changing python script on-the-fly for ActiveX/COM object (win32com)
Message-ID: <1138845738.717736.222710@g49g2000cwa.googlegroups.com>

I have implemented a COM object in Python and I would like
to be able to change the script without stopping and
restarting the application that's using the COM object.  Is
there a way to do this?  (I can change the program that
calls the COM object if needed.)

Thanks...

-- jeff



From shaggers3 at yahoo.com  Fri Feb 17 09:35:20 2006
From: shaggers3 at yahoo.com (Bill)
Date: Fri, 17 Feb 2006 14:35:20 -0000
Subject: Photo Management Python Application
Message-ID: <dt4mv8+d0so@eGroups.com>

Does anyone know of a Python program that will re-name digital photo 
files in a date-time format based on the date stamp of the file?





From steve at REMOVETHIScyber.com.au  Sun Feb  5 13:12:11 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Mon, 06 Feb 2006 05:12:11 +1100
Subject: Generators vs. Functions?
References: <0001HW.C00ABC2B000323A6F0335550@news.individual.de>
	<43E50E73.40504@kzoo.edu>
	<mailman.1426.1139097119.27775.python-list@python.org>
	<gkeFf.434944$2k.218378@pd7tw1no>
	<pan.2006.02.05.08.14.28.103057@REMOVETHIScyber.com.au>
	<2wpFf.560203$ki.296214@pd7tw2no>
Message-ID: <pan.2006.02.05.18.12.09.963265@REMOVETHIScyber.com.au>

On Sun, 05 Feb 2006 16:14:54 +0000, Neil Schemenauer wrote:

> Steven D'Aprano <steve at REMOVETHIScyber.com.au> wrote:
>> Have you actually measured this, or are you just making a wild
>> guess?
> 
> I haven't timed it until now but my guess it not so wild.  I'm
> pretty familiar with the generator implementation (having written
> the initial version of it).

Well I guess you're forgiven then *sheepish grin*

> In Python 2.3, resuming a generator
> does a small amount of setup and then calls eval_frame().  Calling a
> function does more setup work and then also calls eval_frame().

It takes MORE setup to call a function than it takes to resume a
generator?


>> Here is my test, using Python 2.3. I've tried to make the test as
>> fair as possible, with the same number of name lookups in both
>> pieces of test code.
> 
> On my machine t4 is faster than t3.  Your test is not so fair
> because the generator is doing a "while" loop (executing more
> bytecode instructions) while the function is just returning a value
> (one instruction).

A fair criticism, but then a generator with just one instruction is, well,
pointless.

 
> On your machine the function call may be faster due to CPU cache
> effects or branch prediction.  In any case, the difference you are
> trying to measure is extremely small.  Try adding some arguments to
> the functions (especially keyword arguments).


Small in absolute terms, but significant in relative terms: as an order of
magnitude, a factor of about 1/10th.

Of course, I never expected that calling/resuming cost to be significant
for most real world uses. If I gave anyone that impression, it wasn't
intended.

> What your test does show is that the speed difference should not
> come into the decision of which construct to use.

I never said it should.



-- 
Steven.



From LittlePython at lost.com  Sun Feb 12 11:07:55 2006
From: LittlePython at lost.com (LittlePython)
Date: Sun, 12 Feb 2006 16:07:55 GMT
Subject: Newbie
Message-ID: <v3JHf.2731$lo3.2501@trnddc07>

Is this a good place to post python questions from newbie's, or would you
suggest another board?
Thx




From john at totalrekall.co.uk  Fri Feb  3 08:00:58 2006
From: john at totalrekall.co.uk (John Dean)
Date: Fri, 3 Feb 2006 13:00:58 GMT
Subject: Embedding Python into C/C++ applications
Message-ID: <43e35299$0$5001$db0fefd9@news.zen.co.uk>

Hi

Could somebody, please tell me where I can find information about embedding
Python into a C/C++ application. The example in the docs is rather simple. I
am looking for something a bit more complex and longer

-- 
Best Regards
John


From http  Wed Feb  1 19:52:34 2006
From: http (Paul Rubin)
Date: 01 Feb 2006 16:52:34 -0800
Subject: Why checksum? [was Re: Fuzzy Lookups]
References: <1138635665.956131.130630@f14g2000cwb.googlegroups.com>
	<1138670927.377396.78090@g44g2000cwa.googlegroups.com>
	<mailman.1266.1138680617.27775.python-list@python.org>
	<1138721690.283464.71570@g14g2000cwa.googlegroups.com>
	<mailman.1289.1138722708.27775.python-list@python.org>
	<pan.2006.01.31.21.28.14.333129@REMOVETHIScyber.com.au>
	<7xy80wm61h.fsf@ruckus.brouhaha.com>
	<pan.2006.02.01.10.59.21.530026@REMOVETHIScyber.com.au>
Message-ID: <7xlkwud1kd.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVETHIScyber.com.au> writes:
> Sure. But if you are just comparing two files, is there any reason to
> bother with a checksum? (MD5 or other.)

No of course not, except in special situations, like some problem
opening and reading both files simultaneously.  E.g.: the files are on
two different DVD-R's, they are too big to fit in ram, and you only
have one DVD drive.  If you want to compare byte by byte, you have to
either copy one of the DVD's to your hard disk (if you have the space
available) or else swap DVD's back and forth in the DVD drive reading
and comparing a bufferload at a time.  But you can easily read in the
first DVD and compute its hash on the fly, then read and hash the
second DVD and compare the hashes.

If it's a normal situation with two files on HD, just open both files
simultaneously, and use large buffers to keep the amount of seeking
reasonable.  That will be faster than big md5 computations, and more
reliable (there are known ways to construct pairs of distinct files
that have the same md5 hash.)


From draghuram at gmail.com  Sat Feb 25 20:13:12 2006
From: draghuram at gmail.com (draghuram at gmail.com)
Date: 25 Feb 2006 17:13:12 -0800
Subject: ImportError in Unpickle
Message-ID: <1140916392.357064.291290@t39g2000cwt.googlegroups.com>

Hi,

I have a python script that pickles and unpickles a give object. It
works without any problems on windows (the data was pickled on windows
first). But when I try to run the script on Linux, I get the following
error:

    mydbinfo = pickle.Unpickler(f).load()
  File "/usr/lib/python2.3/pickle.py", line 872, in load
    dispatch[key](self)
  File "/usr/lib/python2.3/pickle.py", line 1083, in load_inst
    klass = self.find_class(module, name)
  File "/usr/lib/python2.3/pickle.py", line 1138, in find_class
    __import__(module)
ImportError: No module named __main__

Even running the script with cygwin's python results in same error. It
looks me to be some problem with path setting for finding modules. Can
someone shed more light?

Thanks in advance,
Raghu.



From raims at dot.com  Sat Feb 11 10:11:32 2006
From: raims at dot.com (Lawrence Oluyede)
Date: Sat, 11 Feb 2006 16:11:32 +0100
Subject: Yet another GUI toolkit question...
References: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
	<dskp1p$huu$01$1@news.t-online.com>
	<43EDF730.2070204@wordtech-software.com>
Message-ID: <87zmkyszff.fsf@voodoo.myself>

Kevin Walzer <sw at wordtech-software.com> writes:

> Unfortunately, PyGTK does not run natively on the Mac (it's X11 only).

There's some work in progress:
http://developer.imendio.com/wiki/Gtk_Mac_OS_X

-- 
Lawrence - http://www.oluyede.org/blog
"Anyone can freely use whatever he wants but the light at the end
of the tunnel for most of his problems is Python"


From mahs at telcopartners.com  Wed Feb  8 13:25:37 2006
From: mahs at telcopartners.com (Michael Spencer)
Date: Wed, 08 Feb 2006 10:25:37 -0800
Subject: A __getattr__ for class methods?
In-Reply-To: <1139421293.213901.5380@f14g2000cwb.googlegroups.com>
References: <1139421293.213901.5380@f14g2000cwb.googlegroups.com>
Message-ID: <dsdd1o$nru$1@sea.gmane.org>

Dylan Moreland wrote:
> I'm trying to implement a bunch of class methods in an ORM object in
> order to provide functionality similar to Rails' ActiveRecord. This
> means that if I have an SQL table mapped to the class "Person" with
> columns name, city, and email, I can have class methods such as:
> 
>     Person.find_by_name
>     Person.find_by_city_and_name
>     Person.find_by_name_and_city_and_email
> 
> I have a metaclass generating basic properties such as .name and .city,
> but I don't want to generate a class method for every permutation of
> the attributes. I'd like to have something much like __getattr__ for
> instance attributes, so that if a method like
> Person.find_by_city_and_email cannot be found, I can construct a call
> to the basic find method that hides the SQL. Is there any way of doing
> this, ...

Sure, define __getattr__ on the type of the class i.e., the metaclass, just as 
you define it on a class to provide default-attribute-lookup to its instances:

  >>> class A(object):
  ...     class __metaclass__(type):
  ...         def __getattr__(cls, attr):
  ...             return "%s.%s" % (cls.__name__, attr)
  ...
  >>> A.somefunc
  'A.somefunc'
  >>> A.someotherfunc
  'A.someotherfunc'
  >>>

HTH

Michael



From jm.suresh at gmail.com  Tue Feb 21 01:41:02 2006
From: jm.suresh at gmail.com (Suresh Jeevanandam)
Date: Tue, 21 Feb 2006 12:11:02 +0530
Subject: Augmented assignment
In-Reply-To: <1hb2v4y.10mq2db1cii2tcN%aleaxit@yahoo.com>
References: <dte88n$568$2@home.itg.ti.com>
	<1hb2v4y.10mq2db1cii2tcN%aleaxit@yahoo.com>
Message-ID: <dteclv$8gf$1@home.itg.ti.com>

Thanks Alex. I was not aware of mtimeit.

regards,
Suresh
Alex Martelli wrote:
> Suresh Jeevanandam <jm.suresh at gmail.com> wrote:
> 
>> Hi,
>>       Is there any gain in performance because of augmented assignments.
>>
>>       x += 1  vs x = x+1
>>
>> Or are both of them the same.
> 
> Just *MEASURE*, man!
> 
> helen:~/apy alex$ python -mtimeit -s'x=0.0' 'x=x+1'
> 1000000 loops, best of 3: 0.507 usec per loop
> 
> helen:~/apy alex$ python -mtimeit -s'x=0.0' 'x+=1'
> 1000000 loops, best of 3: 0.504 usec per loop
> 
> Basically a dead draw, so use what's clearest to you.  And learn to use
> -mtimeit to satisfy most such curiosities much more effectively.
> 
> 
> Alex


From steve at holdenweb.com  Tue Feb  7 23:22:49 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 07 Feb 2006 23:22:49 -0500
Subject: apostrophe or double quote?
In-Reply-To: <1139370460.360400.232500@z14g2000cwz.googlegroups.com>
References: <1139370460.360400.232500@z14g2000cwz.googlegroups.com>
Message-ID: <dsbrmr$61u$2@sea.gmane.org>

Huy wrote:
> I've been unable to find information clarifying this but.  What is the
> difference between 'somestring' and "somestring"?  When I use type() it
> still reports as string.  If there is a difference could someone point
> me to documentation or explain when to use and when not to?  Hope I
> sound clear.
> 
It's just easier to have two permitted string quotes. That way, if your 
string has an apostrophe in it you can say

     s = "it's"

and if it has a double quote in it you can say

     s = 'The double quote (") rules'

So there's really no difference at all. You can also use escaping to 
achieve the same end:

     s = "The double quote (\") rules"

if you prefer.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From http  Thu Feb 16 06:20:18 2006
From: http (Paul Rubin)
Date: 16 Feb 2006 03:20:18 -0800
Subject: web crawler in python or C?
References: <1140069412.051298.242150@g44g2000cwa.googlegroups.com>
	<7xy80b96h2.fsf@ruckus.brouhaha.com>
	<1140075962.037640.126340@g43g2000cwa.googlegroups.com>
Message-ID: <7xr7635z4d.fsf@ruckus.brouhaha.com>

"abhinav" <abhinavduggal at gmail.com> writes:
> It is DSL broadband 128kbps.But thats not the point.

But it is the point.

> What i am saying is that would python be fine for implementing fast
> crawler algorithms or should i use C.Handling huge
> data,multithreading,file handling,heuristics for ranking,and
> maintaining huge data structures.What should be the language so as
> not to compromise that much on speed.What is the performance of
> python based crawlers vs C based crawlers.Should I use both the
> languages(partly C and python).How should i decide what part to be
> implemented in C and what should be done in python?  Please guide
> me.Thanks.

I think if you don't know how to answer these questions for yourself,
you're not ready to take on projects of that complexity.  My advice
is start in Python since development will be much easier.  If and when
you start hitting performance problems, you'll have to examine many
combinations of tactics for dealing with them, and switching languages
is just one such tactic.  


From felipe.lessa at gmail.com  Sat Feb 18 11:52:00 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sat, 18 Feb 2006 14:52:00 -0200
Subject: share function argument between subsequent calls but not
	between class instances!
In-Reply-To: <11vejkega5tbrc5@corp.supernews.com>
References: <11vejkega5tbrc5@corp.supernews.com>
Message-ID: <1140281521.11250.3.camel@kenshin>

Em S?b, 2006-02-18 ?s 17:42 +0100, K. Jansma escreveu:
> How can I avoid this without using eg. self.L in an __init__?

Why not use it? That's how it's meant to be done!

> Thanks in advance,
> Karel.

Cya,
Felipe.

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From n.estner at gmx.de  Fri Feb  3 06:35:25 2006
From: n.estner at gmx.de (n.estner at gmx.de)
Date: 3 Feb 2006 03:35:25 -0800
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<iUwEf.24484$1%5.21795@tornado.texas.rr.com>
	<1138928166.272387.51110@g44g2000cwa.googlegroups.com>
	<bSAEf.24523$1%5.10519@tornado.texas.rr.com>
Message-ID: <1138966525.867161.40950@f14g2000cwb.googlegroups.com>

Yes, that's what I had in mind when I said it could be made
recursion-safe. It's still not thread-safe, but I think that could be
done too, using thread-local-variables instead of globals.

> class TestB:
>     @memberFunction
>     def do(x):
>         z = __  # lambda's shouldn't directly reference '__'
>         x.do(lambda : z)

Yes, that's what I meant when I said it wasn't lambda-safe. That means
a completely legal and (in my code) common expression can behave
totally unexpected. Would be a no-go for me.

But I think it gets worse:

class TestA:
    @memberFunction
    def do():
        yield 1
        yield 2
        yield __


class TestB:
    @memberFunction
    def bar():
        for x in TestA().do():
            print x

TestB().bar()

Doesn't behave as expected, and the only way I can see to fix it would
be to declare a local function inside TestA's "do" function...



From bob at passcal.nmt.edu  Thu Feb 23 14:04:38 2006
From: bob at passcal.nmt.edu (Bob Greschke)
Date: Thu, 23 Feb 2006 12:04:38 -0700
Subject: A C-like if statement
References: <hp-dnY20cusOnGPeRVn-rg@nmt.edu> <dtl04p$5q2$1@reader2.panix.com>
Message-ID: <sdadnS6nfNnbmmPeRVn-sw@nmt.edu>


"Roy Smith" <roy at panix.com> wrote in message 
news:dtl04p$5q2$1 at reader2.panix.com...
> Bob Greschke <bob at passcal.nmt.edu> wrote:
>>I miss being able to do something like this in Python
>>
>>1f (I = a.find("3")) != -1:
>>    print "It's here: ", I
>>else:
>>    print "No 3's here"
>>
>>where I gets assigned the index returned by find() AND the if statement 
>>gets
>>to do its job in the same line.  Then you don't have to have another like
>>that specifically gets the index of the "3".  Is there a way to do this in
>>Python?
>
> It is a deliberate and fundamental design decision in Python that
> assignment is a statement, not an expression with side effects.  This
> means you often need an "extra" line compared to a classic C "assign
> and test" idiom such as you have above.  I, like you, often miss the
> compactness of the C idiom, but there it is.
>
> It's also unpythonic to return magic values to indicate failure.
> Throwing an exception would be the more normal way of doing it.  So,
> I'd expect the above to translate into something like:
>
> try:
>    i = a.find("3")
>    print "It's here: ", i
> except NotFound:
>    print "No 3's here"

Nuts.  I guess you're right.  It wouldn't be proper.  Things are added or 
proposed every day for Python that I can't even pronounce, but a simple 'if 
(I = a.find("3")) != -1' isn't allowed.  Huh.  It might be time to go back 
to BASIC. :)

I think your way would work if .find() were replaced with .index().  I'm 
just trying to clean up an if/elif tree a bit, so using try would make 
things bigger.

Thanks!

Bob




From cvanarsdall at mvista.com  Thu Feb  9 12:37:05 2006
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Thu, 09 Feb 2006 09:37:05 -0800
Subject: Threads and Interpreter death
Message-ID: <43EB7DC1.1030005@mvista.com>

I've been toying with threads a lot lately and I've noticed that if a 
scripting error occurs in a thread the thread dies, but not the process 
that spawned the thread.

Is python supposed to behave this way or is this type of behavior 
accidental?

Thanks,

Carl


-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From franz.steinhaeusler at gmx.at  Thu Feb 23 09:13:01 2006
From: franz.steinhaeusler at gmx.at (Franz Steinhaeusler)
Date: Thu, 23 Feb 2006 15:13:01 +0100
Subject: regular expresson for Unix and Dos Lineendings wanted
References: <jterv157550g4qd4rosc3a2o8l69gcau8v@4ax.com>
	<mailman.2346.1140703308.27775.python-list@python.org>
Message-ID: <ujgrv19d4thh28cvh4emqi2m1p5g1gofuh@4ax.com>

On Thu, 23 Feb 2006 13:54:50 +0000, Martin Franklin
<mfranklin1 at gatwick.westerngeco.slb.com> wrote:

>> 
>>>>> r="erewr    \r\nafjdskl     "
>> 'erewr    \r\nafjdskl'
>> 
>> 2) Unix
>>>>> r="erewr    \nafjdskl     "
>> 'erewr\nafjdskl'
>
>why not use string methods strip, rstrip and lstrip
>

because this removes only the last spaces,
>>> r
'erewr    \r\nafjdskl     '
>>> r.rstrip()
'erewr    \r\nafjdskl'

I want:
'erewr\r\nafjdskl'

or for unix line endings
'erewr\nafjdskl'

-- 
Franz Steinhaeusler


From ronnyma at math.uio.no  Fri Feb 17 18:02:24 2006
From: ronnyma at math.uio.no (Ronny Mandal)
Date: Sat, 18 Feb 2006 00:02:24 +0100
Subject: Difference: __iadd__ and __add__
Message-ID: <pdlcv1lcroqifqcsjjjj3s4dtki3n1a5df@4ax.com>

Can someone please explain or point me to articles regarding these two
methods?

Thanks.


From deets at nospam.web.de  Thu Feb 23 10:54:07 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 23 Feb 2006 16:54:07 +0100
Subject: Detec nonascii in a string
References: <mailman.2354.1140708758.27775.python-list@python.org>
Message-ID: <46648pF9aps6U1@uni-berlin.de>

Sebastian Bassi wrote:

> Hello,
> 
> How do I detect non-ascii letters in a string?
> I want to detect the condition that a string have a letter that is not
> here: string.ascii_letters

"???".decode("ascii")

should do the trick -- you get an UnicodeError when there is anything ascii
can't encode.

Diez


From seanatpurdue at hotmail.com  Fri Feb  3 22:51:52 2006
From: seanatpurdue at hotmail.com (Sean)
Date: 3 Feb 2006 19:51:52 -0800
Subject: python's library support
Message-ID: <1139025112.098122.131330@z14g2000cwz.googlegroups.com>

I am a newbie in python, and I have a feeling that python provides less
library support than perl www.cpan.org  This seems a big discussion
topic.

I want to know if there is extensive algorithm library support in
python. I know there is a pretty neat module in perl to implement graph
theory. Is there a graph theory module in python?

Thanks,



From mark at mark-fink.de  Sat Feb 18 03:08:55 2006
From: mark at mark-fink.de (Mark Fink)
Date: 18 Feb 2006 00:08:55 -0800
Subject: jython socket sendall
Message-ID: <1140250135.240867.316540@g44g2000cwa.googlegroups.com>

Hi there,
I am about to port a server application from Java to Jython. For the
socket part I found some examples written in Python. I have problems to
figure out the socket part of the application. In Jython 2.1 the
sendall function is missing?

    def establishConnection(self):
        self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        print type(self.host), repr(self.host)
        print type(self.port), repr(self.port)
        self.socket.connect((self.host, self.port))
#        self.socketOutput = self.socket.getOutputStream()
        self.socketOutput = self.socket
#        self.socketReader = StreamReader(self.socket.getInputStream())
        self.socketReader = self.socket
        bytes = self.makeHttpRequest().encode("UTF-8")
        print type(bytes), repr(bytes)
        self.socketOutput.sendall(bytes)
#        self.socketOutput.flush()
        sys.stdout.write("http request sent\n")

-Mark



From bh at intevation.de  Thu Feb 23 09:46:12 2006
From: bh at intevation.de (Bernhard Herzog)
Date: Thu, 23 Feb 2006 15:46:12 +0100
Subject: list assignment
References: <11vpi2gdcbccbf6@corp.supernews.com>
	<1140641275.840358.292790@o13g2000cwo.googlegroups.com>
	<11vpoh4eutk6106@corp.supernews.com>
Message-ID: <s9zr75ub0az.fsf@thetis.intevation.de>

Norvell Spearman <norvell at stenocall.com> writes:

> Lutz and Ascher have tuple and list assignment as separate entries in
> their assignment statement forms table so I was expecting there to be
> some difference; thanks for setting me straight.

In older Python versions there was a difference between list unpacking
and tuple unpacking.  The former would only work with lists and the
latter with tuples.  With Python 1.5, both were unified into a more
general sequence unpacking, but for backwards compatibility both
syntaxes were kept.

   Bernhard

-- 
Intevation GmbH                                 http://intevation.de/
Skencil                                           http://skencil.org/
Thuban                                  http://thuban.intevation.org/


From stefan.neumann at freiheit.com  Mon Feb  6 04:58:34 2006
From: stefan.neumann at freiheit.com (Stefan Neumann)
Date: Mon, 06 Feb 2006 10:58:34 +0100
Subject: Daemon terminates unexpected
Message-ID: <43E71DCA.8010307@freiheit.com>

I have written a daemon which should run endlessly. The structure looks
like this:

- start-stop-daemon forks my python program

then:

if __name__=="__main__":
    try:
        main()
    except Exception,e
        <write exception>

def main():
    # I need a starter to use the program also from the unittests
    starter=starter()
    starter.start()

    while True:
        #TODO: Catch kill signal
        # I know, dirty....
        sleep(10)

class Starter(Thread):

    def __init__(<not interesting>):
        Thread.__init__(self)
	<do some init stuff>
        self.setDaemon(True)

    def run(self):
        try:
            <start an SMTP-Server
            asyncore.loop()
        except Exception,e:
            <write exception in log>

The problem is now that the SMTP-Server quits donig its work. First I
thought, there will be an exception be thrown but actually, after
catching all global exceptions there is no log entry for it.

I really don't know why my program terminates. It happens nearly
regularly after five days.

Why I think, everything works correctly (correct me, if I am wrong):

Main will actually live forever because of the endless loop.
It starts a thread, which is set as daemon. This daemon will live until
all non daemon threads have terminated. So why does this program end?

I have read somethong about double-fork, can someone explain, why to use
this way for starting a daemon?

Thanks in advanced.

Stefan
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From girodt at gmail.com  Tue Feb  7 09:58:07 2006
From: girodt at gmail.com (Thomas Girod)
Date: 7 Feb 2006 06:58:07 -0800
Subject: variables preceeded with @
In-Reply-To: <44rotbF3l5fkU1@uni-berlin.de>
References: <1139321853.827836.279270@g14g2000cwa.googlegroups.com>
	<44rotbF3l5fkU1@uni-berlin.de>
Message-ID: <1139324287.726845.142160@z14g2000cwz.googlegroups.com>

Yum, food for thoughts. Thanks Diez.



From noway at sorry.com  Sun Feb 12 04:39:54 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Sun, 12 Feb 2006 09:39:54 GMT
Subject: Single-file executables
References: <daadb$43ee6b05$4275d90a$28181@FUSE.NET>
	<1139702872.177824.323010@g47g2000cwa.googlegroups.com>
Message-ID: <KnDHf.173567$65.4790550@twister1.libero.it>

Ravi Teja wrote:

> Actually, py2exe (from version 0.6.1) onwards does create single file
> exes without ANY additional dependencies.

They still require an external MSVCR71.DLL if made with Python 2.4. PyInstaller
1.1 (to be released today) does not have this problem.
-- 
Giovanni Bajo




From erniedude at gmail.com  Tue Feb  7 10:33:54 2006
From: erniedude at gmail.com (Ernesto)
Date: 7 Feb 2006 07:33:54 -0800
Subject: Regular Expression Syntax Help
In-Reply-To: <1139324925.233027.26430@o13g2000cwo.googlegroups.com>
References: <1139324925.233027.26430@o13g2000cwo.googlegroups.com>
Message-ID: <1139326434.597342.290090@z14g2000cwz.googlegroups.com>

The word "Title" there should be "Name".

What I really need is the pattern for getting the entire string after
"Name: " until a '\n' is found.



From fredrik at pythonware.com  Mon Feb  6 12:48:10 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 6 Feb 2006 18:48:10 +0100
Subject: problem in ElementTree SubElement
References: <fc5d4c490602060935l4c74efecl@mail.gmail.com>
Message-ID: <ds824s$2lt$1@sea.gmane.org>

Sbaush wrote:

> I would get this element in xml:
>
> <date month="02" day="06"  />
>
> I have write this:
>
> date=ET.SubElement(idsreq,"date")
>         date.set("month",month)
>         date.set("day",day)
>
> but i get this:
>
> <date day="06" month="02" />
>
> The attributes are not in my order!!
> how i can get the attributes in right order???

XML attributes are not ordered.

the default ET writer sorts the attributes in lexical order, to guarantee con-
sistent output.  rolling your own writer won't help, since Python's dictionaries
don't preserve the order either.

</F>





From tuvas21 at gmail.com  Wed Feb 22 21:23:09 2006
From: tuvas21 at gmail.com (Tuvas)
Date: 22 Feb 2006 18:23:09 -0800
Subject: Module question
In-Reply-To: <mailman.2271.1140565085.27775.python-list@python.org>
References: <1140559897.172126.43820@o13g2000cwo.googlegroups.com>
	<1140560655.407740.273490@z14g2000cwz.googlegroups.com>
	<1140561649.452528.250880@g44g2000cwa.googlegroups.com>
	<mailman.2271.1140565085.27775.python-list@python.org>
Message-ID: <1140661389.288483.303600@g43g2000cwa.googlegroups.com>

Ahhh. Actually, I realized my problem was the fact that not everything
had been loaded yet. Circular loading can be a bit difficult I can
see... I guess I need to import the new module after x has been
declared? Ei, I need this.

Mod1.py
x=1
from mod2.py import *
=================
Mod2.py
from mod1.py import x

Will this work right? Thanks!



From gregpinero at gmail.com  Wed Feb  1 10:53:47 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Wed, 1 Feb 2006 10:53:47 -0500
Subject: urllib2 - My POST Request just isn't working right
Message-ID: <312cfe2b0602010753uc363a85wb3f87cf2677993a2@mail.gmail.com>

Hi guys,

I'm trying to write a program to get FedEx shipping rates, and I'm
following their API as outlined in this document:
http://www.fedex.com/us/solutions/wis/pdf/fsm_directmanual.pdf

I need specifically to make a POST request to their server as shown on
page 12.  However I continually get server  error 500, and they FedEx
support advised me that this means my request is incorrect somewhere.

I put the code I"m using at the end of this email.  Unfortunately I
don't know how to "see" the request the code generates either so I
can't paste that here.

Any help would be greatly appriciated.

--
Gregory Pi?ero
Chief Innovation Officer
Blended Technologies
(www.blendedtechnologies.com)

Code pasted below (contains sample info so it won't work for you):

import urllib
import urllib2

FedEx_API_URL="https://gatewaybeta.fedex.com:443/GatewayDC"

xml_request="""<?xml version="1.0" encoding="UTF-8" ?>
<FDXSubscriptionRequest xmlns:api="http://www.fedex.com/fsmapi"
xmlns:xsi="http://www.w3.org/2001/XMLSchemainstance"
xsi:noNamespaceSchemaLocation="FDXSubscriptionRequest.xsd">
<RequestHeader>
<CustomerTransactionIdentifier>String</CustomerTransactionIdentifier>
<AccountNumber>123456789</AccountNumber>
</RequestHeader>
<Contact>
<PersonName>Jim Smith</PersonName>
<CompanyName>Creative Widgets</CompanyName>
<Department>Shipping</Department>
<PhoneNumber>5405559900</PhoneNumber>
<PagerNumber>9999999999</PagerNumber>
<FaxNumber>5405559901</FaxNumber>
<E-MailAddress>jim at abc.com</E-MailAddress>
</Contact>
<Address>
<Line1>123 Main Street</Line1>
<Line2>1st Floor</Line2>
<City>Anycity</City>
<StateOrProvinceCode>VA</StateOrProvinceCode>
<PostalCode>24060</PostalCode>
<CountryCode>US</CountryCode>
</Address>
</FDXSubscriptionRequest>"""

values = {'request':xml_request}
headers = { 'Referer' : 'YourCompany',
            'Host':'https://gatewaybeta.fedex.com/GatewayDC',
            'Accept':'image/gif, image/jpeg, image/pjpeg, text/plain,
text/html, */*',
            'Content-Type':'image/gif'
            }

data = urllib.urlencode(values)
req = urllib2.Request(FedEx_API_URL, data, headers)
try:
    handle = urllib2.urlopen(req)
except IOError, e:
    if hasattr(e, 'reason'):
        print 'We failed to reach a server.'
        print 'Reason: ', e.reason
        print e.info()
    elif hasattr(e, 'code'):
        print 'The server couldn\'t fulfill the request.'
        print 'Error code: ', e.code
        print e.info()
else:
    the_page = handle.read()
    print the_page


From siv.hansen at gmail.com  Mon Feb 27 15:39:06 2006
From: siv.hansen at gmail.com (Cruella DeVille)
Date: 27 Feb 2006 12:39:06 -0800
Subject: type = "instance" instead of "dict"
In-Reply-To: <44035966$1_2@newspeer2.tds.net>
References: <1141069989.763239.191140@u72g2000cwu.googlegroups.com>
	<44035966$1_2@newspeer2.tds.net>
Message-ID: <1141072746.685948.251040@j33g2000cwa.googlegroups.com>

So what you are saying is that my class Dict is a subclass of Dict, and
user defined dicts does not support iteration?

What I'm doing is that I want to write the content of a dictionary to a
file, and send the dictionary (favDict) as a parameter like this:
favDict = Dict() <-- my own class (or not?)
# put things in favDict (works fine)
fileToWrite.writeFile(favDict) # AttributeError: Dict instance has no
attribute 'itervalues'
where fileToWrite is a filepointer in write-mode

Can I send a dictionary as a parameter the way I do here?

And another issue: what does the "self" - thing mean? I'm familiar with
java and php (is it like the java  and php- this?)



From mh at pixar.com  Tue Feb  7 14:21:49 2006
From: mh at pixar.com (Mark Harrison)
Date: Tue, 07 Feb 2006 19:21:49 GMT
Subject: creat a DOM from an html document
Message-ID: <hr6Gf.1933$rL5.1215@newssvr27.news.prodigy.net>

I thought I saw a package that would create a DOM from html, with
allowances that it would do a "best effort" job to parse
non-perfectly formed html.

Now I can't seem to find this... does anybody have a recommendation
as to a good package to look at?

Many TIA!
Mark


From amorgan at xenon.Stanford.EDU  Tue Feb  7 18:06:26 2006
From: amorgan at xenon.Stanford.EDU (Alan Morgan)
Date: Tue, 7 Feb 2006 15:06:26 -0800 (PST)
Subject: Too Many if Statements?
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<dsaqkj$jhm$1@xenon.Stanford.EDU>
	<GU8Gf.22899$Jd.6095@newssvr25.news.prodigy.net>
Message-ID: <dsb95i$pld$1@xenon.Stanford.EDU>

In article <GU8Gf.22899$Jd.6095 at newssvr25.news.prodigy.net>,
Bryan Olson  <fakeaddress at nowhere.org> wrote:
>Alan Morgan wrote:
>> slogging_away wrote:
>> 
>>>Hi - I'm running Python 2.4.2 (#67, Sep 28 2005, 12:41:11) [MSC v.1310
>>>32 bit (Intel)] on win32, and have a script that makes numerous checks
>>>on text files, (configuration files), so discrepancies can be reported.
>>>The script works fine but it appears that I may have hit a wall with
>>>'if' statements.
>>>
>> I generated files with 10000, 25000, and 50000 simple if statements and ran
>> them.  10000 was okay, 25000 gave a bizarre internal error, and 50000 segfaulted
>> and died.  My system has plenty of memory and it isn't obvious to me why python
>> should be so bothered about this.  I'm not sure why I can have 10x the number of
>> if statements that cause you trouble.  There might be some overall limitation
>> on the number of statements in a file.
>
>I made a script with 100,000 if's, (code below) and it appears
>to work on a couple systems, including Python 2.4.2 on Win32-XP.
>So at first cut, it doesn't seem to be just the if-count that
>triggers the bug.

Mine was a simple

#!/usr/local/bin/python

zot=24999
if zot == 0:
  print "It's 0"

if zot == 1:
  print "It's 1"

....

if zot == 24999:
  print "It's 24999"

generated (I'm ashamed to admit) by a perl script.  Is there any good reason why
it is failing?  I'd prefer a "Too many silly walks in your program.  Reduce!" to
a crash.  I could experiment with putting the matching 'if' at the beginning 
rather than at the end, but I'm not sure what that would tell me.

Alan
-- 
Defendit numerus


From elezarsimeonpapo at yahoo.com  Tue Feb  7 12:39:49 2006
From: elezarsimeonpapo at yahoo.com (Elezar Simeon Papo)
Date: 7 Feb 2006 09:39:49 -0800
Subject: ValueError: need more than 3 values to unpack
In-Reply-To: <roy-D476D5.10252921012006@reader2.panix.com>
References: <1137838605.255800.316100@g44g2000cwa.googlegroups.com>
	<roy-D476D5.10252921012006@reader2.panix.com>
Message-ID: <1139333989.627281.270100@g43g2000cwa.googlegroups.com>

Thanks a lot guys. this solved the problem.
Best
Elezar

----------------------------------------------------------
Izraz.com - an open bosnian-croatian-serbian dictionary
http://izraz.com/Category:Medicinska_stanja



From robert.h.boyd at gmail.com  Wed Feb 22 17:05:00 2006
From: robert.h.boyd at gmail.com (Robert Boyd)
Date: Wed, 22 Feb 2006 17:05:00 -0500
Subject: new wooden door step - fixing and finishing
In-Reply-To: <dti985$fhf$1@wake.carmen.se>
References: <1140598234.454510.281820@g14g2000cwa.googlegroups.com>
	<dti985$fhf$1@wake.carmen.se>
Message-ID: <e9e3813b0602221405q744bb3cbl75fc1eeb557de8ed@mail.gmail.com>

On 2/22/06, Magnus Lycka <lycka at carmen.se> wrote:
> jkn wrote:
> > Hi all
>
> Hi!
>
> >     I'm considering having a go at replacing the wooden door step to
> > our back door. The original is loose and rotting.
>
> Aha, like old perl scripts.
>
> > I'm sure some of this will be clearer when I remove the (metal) door
> > frame - how is such a step fixed? Vertical frame fixings?
>
> cx_freeze maybe?
>
> > Also, any suggestions for treating/finishing such an item, subject to
> > heavy use, to prevent future rot? I was wondering about treating it
> > wilth liberal amounts of Teak Oil or similar...
>
> Perhaps a list comprehension will do? Or a regular expression?

No, no, first things first -- which IDE or editor should he use, and
which Door Framework, or should he roll his own Door?

From antonyliu2002 at yahoo.com  Mon Feb 20 23:17:30 2006
From: antonyliu2002 at yahoo.com (Anthony Liu)
Date: Mon, 20 Feb 2006 20:17:30 -0800 (PST)
Subject: Changing values of 1st column of a matrix using take(mymatrix, (0,
	), axis=1)
In-Reply-To: <dte16q$78u$1@sea.gmane.org>
Message-ID: <20060221041730.40307.qmail@web35811.mail.mud.yahoo.com>

Thanks, Tim, that is really cool.  I know there must
be some convenient way of doing this.



--- Tim Hochberg <tim.hochberg at ieee.org> wrote:

> Anthony Liu wrote:
> > I am talking about the 'take' method of numarray.
> > 
> > See here for more info:
> > 
> > http://stsdas.stsci.edu/numarray/Doc/node33.html
> > 
> > If I initialize a matrix 'mymatrix' by
> zeros((3,3),
> > type="Float64"), I get a 3*3 matrix of all zeros.
> > 
> > Look:
> > 
> > 
> >>>>from numarray import *
> >>>>mymatrix = zeros((3,3), type="Float64")
> >>>>mymatrix
> > 
> > array([[ 0.,  0.,  0.],
> >        [ 0.,  0.,  0.],
> >        [ 0.,  0.,  0.]])
> > 
> > 
> > I want to change the zeros of only the first
> column to
> > 1's.  In other words, I want to get:
> > 
> > array([[ 1.,  0.,  0.],
> >        [ 1.,  0.,  0.],
> >        [ 1.,  0.,  0.]])
> > 
> > The 'take' method is able to take out the first
> > column, but I am not sure if there is a good way
> of
> > changing all values of the first column to 1's.
> > 
> > Of course, I know that I can achieve my goal
> pretty
> > easily with this:
> > 
> > for i in range(3): mymatrix[i,0] = 1.0
> > 
> > I am just wondering if there is an existing
> numarray
> > method that elegantly does it for me.
> 
> mymatrix[:,0] = 1.0
> 
> > 
> > 
> > __________________________________________________
> > Do You Yahoo!?
> > Tired of spam?  Yahoo! Mail has the best spam
> protection around 
> > http://mail.yahoo.com 
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 


__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 


From cito at online.de  Tue Feb 14 11:46:31 2006
From: cito at online.de (Christoph Zwerschke)
Date: Tue, 14 Feb 2006 17:46:31 +0100
Subject: [OT] Pythonic gui format?
In-Reply-To: <43f1ca45$0$7339$626a54ce@news.free.fr>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<43f11990$0$667$626a54ce@news.free.fr> <dsshh2$8r3$1@online.de>
	<43f1ca45$0$7339$626a54ce@news.free.fr>
Message-ID: <dst1h5$81m$1@online.de>

bruno at modulix schrieb:
> Christoph Zwerschke wrote:
>> Bruno Desthuilliers schrieb:
>>
>>> Gregory Petrosyan a ?crit :
>>>
>>>> I am currently seeking for pythonic alternative for XML. 

>> Bruno, before writing another simple GUI, 
> 
> <OT>
> Sorry, Christoph, wrong attribution  !-)
> </OT>

I'm sorry, I still get easily confused by usenet multilevel quoting ;-)
I meant Gregory and I meant "GUI library", not "GUI".

-- Christoph


From rupole at hotmail.com  Wed Feb 22 18:32:06 2006
From: rupole at hotmail.com (Roger Upole)
Date: Wed, 22 Feb 2006 18:32:06 -0500
Subject: listdir() - any way to limit # of file entries?
References: <bunpv1pafuserji1bjft3146c7833h1pu9@4ax.com>
Message-ID: <1140651145_371@sp6iad.superfeed.net>

You can use win32file.FindFilesIterator to loop thru the files
without creating a huge list of everthing in the folder.

       hth
          Roger

"Peter A. Schott" <paschott at no.yahoo.spamm.com> wrote in message news:bunpv1pafuserji1bjft3146c7833h1pu9 at 4ax.com...
>I want to build a program that does some archiving.  We have several programs
> that have been dumping files into a folder (one folder) for some time now.  I
> want to limit the number of files returned by listdir to avoid trying to build a
> list with tons of entries.  I then want to move those files into a zip archive
> for the appropriate day/month.
>
> Is there any way to build a list of the first 1000 files or so in a folder?
>
> Running Python 2.4.2 on Win32 with Win32 extensions.
>
> Thanks.
>
> -Pete Schott 



----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----


From rschroev_nospam_ml at fastmail.fm  Mon Feb 27 16:56:16 2006
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Mon, 27 Feb 2006 21:56:16 GMT
Subject: spaces at ends of filenames or directory names on Win32
In-Reply-To: <dtvoap$44m$1@solaris.cc.vt.edu>
References: <dtkuav$keb$1@solaris.cc.vt.edu> <dtvoap$44m$1@solaris.cc.vt.edu>
Message-ID: <4AKMf.283745$6p3.8940775@phobos.telenet-ops.be>

rtilley schreef:
> This will at least allow me to ID folders that start with whitespace... 
> from within Windows too :) yet I still cannot rename the folders after 
> stripping the whitespace... attempting to gives an [Errno 2] No such 
> file or directory. The strip seems to work right too according to the 
> prints before and after.

Does the rename work if try with other names? Maybe the problem is not 
the whitespace; maybe Windows can't rename the folder because some 
process, possibly your program, has an open handle to a file or 
directory under your folder? Unix-systems are able to handle that 
easily, but Windows doesn't.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From kent at kentsjohnson.com  Sun Feb 26 11:30:33 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Sun, 26 Feb 2006 11:30:33 -0500
Subject: sort one list using the values from another list
In-Reply-To: <mailman.2447.1140969980.27775.python-list@python.org>
References: <mailman.2447.1140969980.27775.python-list@python.org>
Message-ID: <4401d314_2@newspeer2.tds.net>

Brian Blais wrote:
> Hello,
> 
> I have two lists, one with strings (filenames, actually), and one with a 
> real-number
> rank, like:
> 
> A=['hello','there','this','that']
> B=[3,4,2,5]
> 
> I'd like to sort list A using the values from B, so the result would be 
> in this example,
> 
> A=['this','hello','there','that']

Here are two ways:
  >>> A=['hello','there','this','that']
  >>> B=[3,4,2,5]
  >>> zip(*sorted(zip(B,A)))[1]
('this', 'hello', 'there', 'that')

  >>> [a for b,a in sorted(zip(B,A))]
['this', 'hello', 'there', 'that']

I prefer the second one, I think it is more readable, will use less 
memory (doesn't have to create a new list B in the final step) and it's 
even faster on my computer:

D:\Projects\CB>python -m timeit -s 
"A=['hello','there','this','that'];B=[3,4,2,5]" "zip(*sorted(zip(B,A)))[1]"
100000 loops, best of 3: 6.29 usec per loop

D:\Projects\CB>python -m timeit -s 
"A=['hello','there','this','that'];B=[3,4,2,5]" "[a for b,a in 
sorted(zip(B,A))]"
100000 loops, best of 3: 5.53 usec per loop

(I'm bored this morning :-)

There's probably a clever way to do it using the key parameter to sort 
but I can't think of it...
> 
> The sort method on lists does in-place sorting.  Is there a way to do 
> what I want here?

The example above does not sort in place, if you want it to be in place use
A[:] = [a for b,a in sorted(zip(B,A))]

Kent


From peter at engcorp.com  Thu Feb 23 16:53:49 2006
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 23 Feb 2006 16:53:49 -0500
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <dtl9ad$35h$1@sea.gmane.org>
References: <dtl9ad$35h$1@sea.gmane.org>
Message-ID: <dtlat7$80c$1@sea.gmane.org>

Paul Probert wrote:
>    My app runs in a loop looking for changes in a database, and like a 
> good boy I call time.sleep(1) inside the loop. Unfortunately this 
> sometimes runs for 200 seconds or so, presumably while my OS is calling 
> Bill Gates to tell him what I've been doing. This happens under NT4, 
> W2k, and XP. What do people do to fix this? Thanks!

Are you saying that you believe the time.sleep(1) call is actually 
blocking for 200 seconds?  Or just that your loop (and we can only guess 
what it looks like) is the one taking that long?

If the former, try something like putting "print 'before'" and "print 
'after'" before and after the sleep, and observe what happens when you 
run the program.  I'm fairly confident in saying there's no chance 
you'll see the "before" sit for 200s before you see the "after" and that 
your problem lies elsewhere, not with time.sleep(1).

If the latter, um, obviously we can't help without more info.

-Peter



From bootsch at acm.org  Thu Feb 16 04:01:35 2006
From: bootsch at acm.org (Paul Boots)
Date: Thu, 16 Feb 2006 10:01:35 +0100
Subject: Job advert: Your help needed
Message-ID: <43F43F6F.1070900@acm.org>

Hi All,

I hope you guys don't mind me posting this to the list, but ...

We are looking for a programmer on a very short term to help us write
a relative simple, yet very specialised, command line application for 
our post production pipeline for a  television show shot in HD (dpx 
files) using Viper cameras.

The program needs to do the following:

- take 3 argument: an EDL and two directories, source and destination.
- based on the edit decisions it should look in the source directory
   and find the corresponding dpx files based on the timecode information
   contained in the dpx  header and copy those files to the destionation
   directory
- the program must create a log file that shows which timecodes could
   not be resolved as well as the edit decision that contained that
   timecode.

There are allready parts of code that could be used to create the
application, which are python code to handle edl and c code that handles
reading the dpx files.  This code can only be used when you are willing
to travel to our location (Iceland).

You (the programmer) should understand film/television  postproduction. 
When you are willing to travel there is a good change we have more 
application that you can build for us.

When you are interested, or know someone who might be, please contact
me directly for further information and to discuss business details.

Best regards,

Paul Boots
bootsch at acm.org
+354 664 1748


From onurb at xiludom.gro  Tue Feb 14 09:17:50 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Tue, 14 Feb 2006 15:17:50 +0100
Subject: Pythonic gui format?
In-Reply-To: <HrKdnTPaI9adeWzeRVn-pg@comcast.com>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<43f11990$0$667$626a54ce@news.free.fr>
	<1139923105.939191.200660@z14g2000cwz.googlegroups.com>
	<HrKdnTPaI9adeWzeRVn-pg@comcast.com>
Message-ID: <43f1e6ab$0$31841$626a54ce@news.free.fr>

DH wrote:
> Gregory Petrosyan wrote:
> 
>> Thanks for JSON. It's more clean&simple than XML, but my main idea is
>> to remove any extra layer between Python and GUI. I want all GUI
>> elements/data to be directly accessible from Python (without extra
>> libraries). 
> 
> Since JSON is just python dicts and lists, you don't need an extra
> library to use it, essentially.

Please stop with this nonsense. Python is Python, JSON is Javascript
Object Notation, and even if the mapping is quite straightforward, you
just can't substitute one for the other. BTW, there *are* some
Python<->JSON Python packages...

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From kyle at kbrooks.ath.cx  Sat Feb 11 20:42:38 2006
From: kyle at kbrooks.ath.cx (Kyle Brooks)
Date: Sat, 11 Feb 2006 20:42:38 -0500
Subject: Circe released to public domain!
In-Reply-To: <44vfk4F43jo4U1@uni-berlin.de>
References: <mailman.1628.1139436361.27775.python-list@python.org>
	<44vfk4F43jo4U1@uni-berlin.de>
Message-ID: <dsm3qe$sfr$1@sea.gmane.org>

Diez B. Roggisch wrote:
> Kyle Brooks schrieb:
> 
>>Wednesday, February 8th, 2006.
>>
>>Dear all,
>>
>>I hereby release Circe to the public domain.
>>
>>Our repo is at http://kbrooks.ath.cx/repos/circe.
> 
> 
> 
> This is the second post I read, followed the link, skimmed through some 
> sources and READMEs, and by now I got the impression that Circe is a IRC 
> client. It would help tremendously if you could mention that in your 
> postings as well as in a simple introductionary HTML-page. Mentioning 
> why I should use Circe and what I need to do so (wx) would help too, I 
> guess.
> 
> 
> Regards,
> 
> Diez

OK. You're right. I'll do that now. Thanks.



From toddw at ActiveState.com  Wed Feb 15 14:07:10 2006
From: toddw at ActiveState.com (Todd Whiteman)
Date: Wed, 15 Feb 2006 11:07:10 -0800
Subject: %SystemDrive%
In-Reply-To: <dsvt14$rev$1@solaris.cc.vt.edu>
References: <dsvt14$rev$1@solaris.cc.vt.edu>
Message-ID: <43F37BDE.9020505@activestate.com>

Another hack:
drive = os.popen("echo %SYSTEMDRIVE%").readline().strip()

rtilley wrote:
> Is there a proper way to get this variable from Windows? I know it's in 
> the registry, but I'd rather not go there. I could not find a CSIDL 
> shell constant for it either. I've been doing this:
>
> os.chdir('/')
> sys_drive = os.getcwd()
> print sys_drive
> C:\
>
> This seems too much of a hack and maybe not 100% right all of the time. 
> How could it be done better?
>   


From http  Fri Feb 24 02:15:08 2006
From: http (Paul Rubin)
Date: 23 Feb 2006 23:15:08 -0800
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
References: <mailman.2369.1140730029.27775.python-list@python.org>
	<dtla7j$pqs$1@newsreader3.netcologne.de>
	<mailman.2373.1140731808.27775.python-list@python.org>
	<hb7tv11kmpnd5m4qhhqg1mdq5n61uc7odq@4ax.com>
Message-ID: <7xlkw1xm6b.fsf@ruckus.brouhaha.com>

Dennis Lee Bieber <wlfraed at ix.netcom.com> writes:
> 	Any chance they all tend to have slow clocks, and are getting bitten
> by a semi-random NTP time update; my machine tends to run the NTP update
> at 7-day intervals (including time of day), counting from the last
> successful synchronization.

This is a good possibility, that the clock is jumping ahead rather
than that 200 seconds of actual real time is going during the
time.sleep call.

What happens if you replace the time.time call with something that
reads the current time from an SNTP server (or equivalent) through a
socket?


From luismgz at gmail.com  Sat Feb 25 12:57:17 2006
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 25 Feb 2006 09:57:17 -0800
Subject: Is Python a Zen language?
In-Reply-To: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
Message-ID: <1140890237.144708.217160@e56g2000cwe.googlegroups.com>

I don't know if python is Zend.
It's quite minimalistic and it "flows" very well, so I guess it is a...
"Feng-shui" language?



From dickey at saltmine.radix.net  Wed Feb  8 06:22:26 2006
From: dickey at saltmine.radix.net (Thomas Dickey)
Date: Wed, 08 Feb 2006 11:22:26 -0000
Subject: Replacing curses
References: <mailman.1566.1139345769.27775.python-list@python.org>
	<43E9234B.6030108@v.loewis.de>
	<mailman.1588.1139372460.27775.python-list@python.org>
Message-ID: <11ujl3ibdh7vne1@corp.supernews.com>

Ian Ward <ian at excess.org> wrote:

> I've had to work around many curses issues while developing Urwid (a 

hmm - I've read Urwid, and most of the comments I've read in that regard
reflect problems in Urwid.  Perhaps it's time for you to do a little analysis.

(looking forward to bug reports, rather than line noise)

-- 
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net


From bencvt at gmail.com  Mon Feb 27 18:32:08 2006
From: bencvt at gmail.com (Ben Cartwright)
Date: 27 Feb 2006 15:32:08 -0800
Subject: str.count is slow
In-Reply-To: <1141073696.107136.318600@j33g2000cwa.googlegroups.com>
References: <1141073696.107136.318600@j33g2000cwa.googlegroups.com>
Message-ID: <1141083127.970403.147100@v46g2000cwv.googlegroups.com>

chrisperkins99 at gmail.com wrote:
> It seems to me that str.count is awfully slow.  Is there some reason
> for this?
> Evidence:
>
> ######## str.count time test ########
> import string
> import time
> import array
>
> s = string.printable * int(1e5) # 10**7 character string
> a = array.array('c', s)
> u = unicode(s)
> RIGHT_ANSWER = s.count('a')
>
> def main():
>     print 'str:    ', time_call(s.count, 'a')
>     print 'array:  ', time_call(a.count, 'a')
>     print 'unicode:', time_call(u.count, 'a')
>
> def time_call(f, *a):
>     start = time.clock()
>     assert RIGHT_ANSWER == f(*a)
>     return time.clock()-start
>
> if __name__ == '__main__':
>     main()
>
> ###### end ########
>
> On my machine, the output is:
>
> str:     0.29365715475
> array:   0.448095498171
> unicode: 0.0243757237303
>
> If a unicode object can count characters so fast, why should an str
> object be ten times slower?  Just curious, really - it's still fast
> enough for me (so far).
>
> This is with Python 2.4.1 on WinXP.
>
>
> Chris Perkins


Your evidence points to some unoptimized code in the underlying C
implementation of Python.  As such, this should probably go to the
python-dev list (http://mail.python.org/mailman/listinfo/python-dev).

The problem is that the C library function memcmp is slow, and
str.count calls it frequently.  See lines 2165+ in stringobject.c
(inside function string_count):

	r = 0;
	while (i < m) {
		if (!memcmp(s+i, sub, n)) {
			r++;
			i += n;
		} else {
			i++;
		}
	}

This could be optimized as:

	r = 0;
	while (i < m) {
		if (s[i] == *sub && !memcmp(s+i, sub, n)) {
			r++;
			i += n;
		} else {
			i++;
		}
	}

This tactic typically avoids most (sometimes all) of the calls to
memcmp.  Other string search functions, including unicode.count,
unicode.index, and str.index, use this tactic, which is why you see
unicode.count performing better than str.count.

The above might be optimized further for cases such as yours, where a
single character appears many times in the string:

	r = 0;
	if (n == 1) {
		/* optimize for a single character */
		while (i < m) {
			if (s[i] == *sub)
				r++;
			i++;
		}
	} else {
		while (i < m) {
			if (s[i] == *sub && !memcmp(s+i, sub, n)) {
				r++;
				i += n;
			} else {
				i++;
			}
		}
	}

Note that there might be some subtle reason why neither of these
optimizations are done that I'm unaware of... in which case a comment
in the C source would help. :-)

--Ben



From http  Thu Feb 16 16:15:59 2006
From: http (Paul Rubin)
Date: 16 Feb 2006 13:15:59 -0800
Subject: Merging two lists of data (Pythonic way)
References: <8k5Jf.27896$sA3.57@fed1read02>
Message-ID: <7xlkwb2eeo.fsf@ruckus.brouhaha.com>

"SMB" <sean at buildingonline.com> writes:
> What I am doing is looking for a pythonic way to parse the LIST2 "code" 
> values and make appropriate changes to to each dictionary if the "code" 
> value is the first element of a list in LIST1.
> 
> The final result may look like this given that the change is adding a new 
> key/value of "VERIFIED"/1 for the matches.

Untested:

from sets import Set
vvals = Set(a[0] for a in LIST1)    # get all the List1 first elt. values
for d in LIST2:
   if d['code'] in vvals:
      d['VERIFIED'] = 1

> I know I could do this with two for loops, but am looking for a better 
> solution maybe involving list comprehension.

I think if list1 is potentially long, the main thing is to avoid n**2
running time, which means use a set or dict to do the lookups, like
above.


From pertz at silo.lib.ia.us  Thu Feb 23 12:00:22 2006
From: pertz at silo.lib.ia.us (Paul Ertz)
Date: Thu, 23 Feb 2006 11:00:22 -0600
Subject: Hiding a column at the root of a plone site ...
Message-ID: <dtkpnu$30n$1@sea.gmane.org>

Hello,

We would like to hide the left column for the main/home page of our 
plone sites dynamically using a tal: expression. I figured out that I 
need to customize the main_template file something like this:

  <td id="portal-column-one"
        metal:define-slot="column_one_slot"
        tal:define="sectionlevel "
        tal:condition="<if home/main page of plone site hide this column>">

What I haven't figured out, is how to identify that the current page is 
the home page/at the root of the plone site. I found some examples on 
the various lists and google, but have not been able to make them work.

python:here == here.portal_url.getPortalObject()
python: here.meta_type != 'Plone Site'" 
python:here.getSectionFromURL()!='section-index' <works as long as the 
main page is index and not front-page>

The below seems to work, but it seems like a hacky way to do 
things.tal:condition="python:here.getSectionFromURL()!='section-index' 
and here.getSectionFromURL()!='section-front-page'">

What it comes down to, I think, is wanting to check if we are at the 
root (top) of the plone site or not.

Thanks much for any help.
paul ertz



From limodou at gmail.com  Thu Feb  9 21:23:05 2006
From: limodou at gmail.com (limodou)
Date: Fri, 10 Feb 2006 10:23:05 +0800
Subject: read-only attributes
In-Reply-To: <20060210013513.8225.qmail@web36712.mail.mud.yahoo.com>
References: <20060210013513.8225.qmail@web36712.mail.mud.yahoo.com>
Message-ID: <505f13c0602091823h1abacf69n9b5fc076c96c1029@mail.gmail.com>

On 2/10/06, john peter <neuzhoundxx at yahoo.com> wrote:
> while reading the lib manual, i came across mentions of read-only
> attributes.
>  for example, a method has a read-only attribute (called _im_self ?) for
> binding
>  a class instance to the method. is such a facility available to custom
> application
>  code? if so, what do i have to do if i want my application code to have
> read-only
>  attributes?
>
>

I think you may consider property() built-in function:

property( [fget[, fset[, fdel[, doc]]]])

Return a property attribute for new-style classes (classes that derive
from object).
fget is a function for getting an attribute value, likewise fset is a
function for setting, and fdel a function for del'ing, an attribute.
Typical use is to define a managed attribute x:


class C(object):
    def __init__(self): self.__x = None
    def getx(self): return self.__x
    def setx(self, value): self.__x = value
    def delx(self): del self.__x
    x = property(getx, setx, delx, "I'm the 'x' property.")

New in version 2.2.

--
I like python!
My Blog: http://www.donews.net/limodou
NewEdit Maillist: http://groups.google.com/group/NewEdit


From larry.bates at websafe.com  Tue Feb 28 16:52:30 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 28 Feb 2006 15:52:30 -0600
Subject: Py2exe
In-Reply-To: <1141162697.347464.49420@i40g2000cwc.googlegroups.com>
References: <1141160676.947534.123630@t39g2000cwt.googlegroups.com>
	<1141162463.658164.34110@i40g2000cwc.googlegroups.com>
	<1141162697.347464.49420@i40g2000cwc.googlegroups.com>
Message-ID: <SP6dnXJDhdXfW5nZnZ2dnUVZ_s6dnZ2d@comcast.com>

D wrote:
> Jay - what I'm not sure of is the syntax to use.  I have downloaded and
> installed py2exe.
> 

First a question:

Have you written the server program as a windows service?  You can't
just run something as a service, it has to be written to be a service.

Your setup files will look something like the ones below.

Client:

from distutils.core import setup
import py2exe
setup(name="client", zipfile=None,
      windows=[{"script":"client.py",
                "icon_resources":[(1,"client.ico")]}],
      options={"py2exe": {"compressed": 1,
                          "optimize": 2,
                          "bundle_files":1}}
     )

Obviously the program here was called client.py.  You will
need an icon to supply to icon_resources.  This creates a
single .EXE file from as much as py2exe can possible put
into it.

Server:

from distutils.core import setup
import py2exe
setup(service=[script:"server.py"], zipfile=None,
      options={"py2exe":{"compressed": 1,
                         "optimize": 2,
                         "bundle_files":1}}
      )


Of course replace 'server' with the name of your program.

These are merely EXAMPLES.  Your specific needs might be
different depending on specifics of your program.

Hope it helps.

Larry Bates


From markus_REMOVEwankusALL_CAPS at hotmail.com  Sun Feb 12 23:54:34 2006
From: markus_REMOVEwankusALL_CAPS at hotmail.com (Markus Wankus)
Date: Mon, 13 Feb 2006 04:54:34 GMT
Subject: how do you pronounce 'tuple'?
In-Reply-To: <vuednQcT5sUEn23eRVn-iA@rcn.net>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
Message-ID: <eiUHf.7378$bd4.6826@edtnps84>

John Salerno wrote:
> Yes, silly question, but it keeps me up at night.  :)
> 
> I know it comes from the suffix -tuple, which makes me think it's 
> pronounced as 'toople', but I've seen (at m-w.com) that the first 
> pronunciation option is 'tuhple', so I wasn't sure. Maybe it's both, but 
> which is most prevalent?
> 
> Thanks! Now time to go back to reading the chapter on tuples...

I'm not sure, but I think it is pronounced "m?nage ? trois".

M.

;-)


From apardon at forel.vub.ac.be  Mon Feb 27 07:08:14 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 27 Feb 2006 12:08:14 GMT
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>
	<4402AB7F.7070804@REMOVEMEcyber.com.au>
Message-ID: <slrne05qte.95h.apardon@rcpc42.vub.ac.be>

Op 2006-02-27, Steven D'Aprano schreef <steve at REMOVEMEcyber.com.au>:
> Paul Rubin wrote:
>
>> Ben Finney <bignose+python at benfinney.id.au> writes:
>> 
>>>Enumerations with no values are meaningless.  The exception
>>>``EnumEmptyError`` is raised if the constructor is called with no
>>>value arguments.
>> 
>> 
>> Why are empty enumerations not allowed?  Empty sets, empty lists,
>> empty dictionaries are all allowed.  I don't see any obvious benefits
>> to not allowing empty enumerations.
>
> What is an empty enum? How and when would you use it?

It could come up in a tool where the tool constructs
an identifier list somehow and then an EnumType from
this list.

IMO this is just as usefull as the possibility to do
the following:

  for a in []:
     ...


One could argue that there is no need to loop over an
empty list, because looping over an empty list is a
noop. But it would needlessly complicate code if every
time we wanted to loop over a list we had to code like
this.

if lst:
  for a in lst:

Sure as long as we look at Enum as something that will
be something literally provided by the programmer, there
is little use for an Empty Enum. Just as there is little
use for looping over an empty list if you literally
provide that empty list, but maybe somewhere in the future
some automation tool will produce scripts that use Enums.

Why should we possibly make the future production of such
a tool more difficult because we can't imagine the use of
Empty Enums now?

-- 
Antoon Pardon


From gene.tani at gmail.com  Thu Feb  9 09:51:49 2006
From: gene.tani at gmail.com (gene tani)
Date: 9 Feb 2006 06:51:49 -0800
Subject: Test indexers...how do they work?
In-Reply-To: <1139494767.338556.110030@g44g2000cwa.googlegroups.com>
References: <1139494767.338556.110030@g44g2000cwa.googlegroups.com>
Message-ID: <1139496709.725958.276590@o13g2000cwo.googlegroups.com>


Raja Raman Sundararajan wrote:
> Hello guys,
>     I was investigating how one can use the "text indexers" in python
> and I stumbled across several ones. eg., pylucene
>
> I wanted to know how the algorithm of indexers look like. I have heard
> people talking about B-Trees. But this info. is simply know enough. I
> would like to know exactly each part of the indexing flow and the
> algorightm behind it work.
>

Info pls, are you talking about how Analyszers do stopwords and
stemming / lemmatization?  or how  queries are handled, or how indexes
(bitfields) are built / queried?  I think Hatcher's book is the best
place to start, tho doesn't focus intensively on lucene's
implementation

http://lucenebook.com/blog/

http://divmod.org/trac/wiki/WhitherLupy

This *was* a pure python port, Lupy which i remember being pretty easy
to follow, maybe you can get them to send it to you



From fuzzyman at gmail.com  Wed Feb  8 04:00:03 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 8 Feb 2006 01:00:03 -0800
Subject: Detecting line endings
In-Reply-To: <1haemdd.18tlbi21nzft50N%aleaxit@yahoo.com>
References: <1139236514.022464.319970@g14g2000cwa.googlegroups.com>
	<1hacujo.1p81efw1ej38ioN%aleaxit@yahoo.com>
	<1139304588.446722.255240@o13g2000cwo.googlegroups.com>
	<1hadpni.1ne1raq17jjbyaN%aleaxit@yahoo.com>
	<1139330618.241072.31770@g43g2000cwa.googlegroups.com>
	<1haemdd.18tlbi21nzft50N%aleaxit@yahoo.com>
Message-ID: <1139389203.549856.315060@g43g2000cwa.googlegroups.com>


Alex Martelli wrote:
> Fuzzyman <fuzzyman at gmail.com> wrote:
>    ...
> > I can't open with a codec unless an encoding is explicitly supplied.  I
> > still want to detect UTF16 even if the encoding isn't specified.
> >
> > As I said, I ought to test this... Without metadata I wonder how Python
> > determines it ?
>
> It doesn't.  Python doesn't even try to guess: nor would any other
> sensible programming language.
>

Right, so opening in "rU" mode and testing the 'newline' attribute
*won't* work for UTF16 encoded files. (Which was what I was asking.)

I'll have to read, determine encoding, decode, then *either* use my
code to determine line endings *or* use ``splitlines(True)``.

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml

> 
> Alex



From johnjsal at NOSPAMgmail.com  Wed Feb  8 20:33:32 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 08 Feb 2006 20:33:32 -0500
Subject: still a valid book?
In-Reply-To: <1139445749.902210.323680@f14g2000cwb.googlegroups.com>
References: <uUsGf.1584$No6.37778@news.tufts.edu>
	<1139445749.902210.323680@f14g2000cwb.googlegroups.com>
Message-ID: <14GdnZJ6l_e1AXfeRVn-pw@rcn.net>

Jonathan Gardner wrote:
> You may want to read
> http://python.org/doc/2.4.2/whatsnew/whatsnew24.html to get an idea of
> what has changed from 2.3 to 2.4 if you buy the 2.3 book.
> 

Yeah, I was looking at that, but it seems a little over my head right 
now. I just didn't want to learn anything and then have to "unlearn" it. 
I'm sure I will always be adding new things, so that isn't so much the 
problem I guess.


From svbrk at start.no  Fri Feb  3 17:08:40 2006
From: svbrk at start.no (svbrk at start.no)
Date: 3 Feb 2006 14:08:40 -0800
Subject: Python on Windows
References: <mailman.1389.1138987315.27775.python-list@python.org>
Message-ID: <1139004520.825307.189290@g47g2000cwa.googlegroups.com>

> I would love a single .exe file that would run without ANY OTHER FILES
> even if it was 50 Mb!

You should look at pyinstaller
(http://pyinstaller.hpcf.upr.edu/cgi-bin/trac.cgi), as far as I know
the only py->exe compiler that makes single file executables for
windows. You may even bundle additional files as well, such as images.

Note: The 1.0 release makes exe's that depend on msvcrt71.dll (which
does not exist under win2000 and win9x). To make a universal windows
executable, you must check out the latest version from svn, or download
my temporary zip-file at
http://home.no.net/~sbrekke/SlideShowTest/pyinstaller.zip . You may
also try my sample slide-show executable
http://home.no.net/~sbrekke/SlideShowTest/show.exe (use the
arrow-buttons to navigate. It was made from the python file
http://home.no.net/~sbrekke/SlideShowTest/show.py with the compilation
script http://home.no.net/~sbrekke/SlideShowTest/build.py).

-svein



From fredrik at pythonware.com  Sun Feb 12 17:43:14 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 12 Feb 2006 23:43:14 +0100
Subject: Clearing the screen
References: <1139688262.046667.296940@g14g2000cwa.googlegroups.com><mailman.1761.1139688853.27775.python-list@python.org><1139725568.890659.253770@f14g2000cwb.googlegroups.com><pan.2006.02.12.06.59.19.550394@REMOVETHIScyber.com.au><1139731250.332185.278280@o13g2000cwo.googlegroups.com>
	<1139735197.228877.71770@z14g2000cwz.googlegroups.com>
Message-ID: <dsodm5$ucm$1@sea.gmane.org>

"mwt" wrote:

> Arrgghh... Is there any way to edit posts on this thing?

are you aware that you're posting to a usenet newsgroup?

> The os.system("clear") doesn't work at all in a module.

works for me (as long as I'm running the code on a platform that
has a clear command).  in what way does it fail for you?

</F>





From yejuan_1204 at yahoo.com.cn  Fri Feb  3 06:38:20 2006
From: yejuan_1204 at yahoo.com.cn (ye juan)
Date: Fri, 3 Feb 2006 19:38:20 +0800 (CST)
Subject: how to run BeautifulSoup in Jython
Message-ID: <20060203113820.16162.qmail@web15010.mail.cnb.yahoo.com>

Hi, 

Anyone tries to use BeautifulSoup (
http://www.crummy.com/software/BeautifulSoup/  ) in
Jython? I can not run that ,the error that Jython
gives me is: unpack sequence too long. 

Sincerely,

Erica

__________________________________________________
???????????????
http://cn.mail.yahoo.com


From grblanco at gmail.com  Wed Feb  1 17:44:03 2006
From: grblanco at gmail.com (JerryB)
Date: 1 Feb 2006 14:44:03 -0800
Subject: locals() and dictionaries
In-Reply-To: <drr0oo$2mb$1@news.doit.wisc.edu>
References: <1138818258.895406.34130@g47g2000cwa.googlegroups.com>
	<drr0oo$2mb$1@news.doit.wisc.edu>
Message-ID: <1138833843.647435.242870@f14g2000cwb.googlegroups.com>

Rocco:
thanks for your response. The examples were just made up. I don't
normally use 'dict' and 'str'.
I know I can create a dictionary with the variables I want, etc. My
question is not how to solve the problem, or how to come up with a
work-around (I'm getting pretty good at this one :), so my question
stands:

is it possible to access the individual members of a dictionary using %
locals() when creating a string?

Thank you again for your suggestions.
Jerry



From riko at despammed.com  Tue Feb 28 12:17:22 2006
From: riko at despammed.com (Mc Osten)
Date: Tue, 28 Feb 2006 18:17:22 +0100
Subject: Is Python a Zen language?
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
	<9o1Mf.39804$H71.16633@newssvr13.news.prodigy.com>
	<1140994504.247709.256020@u72g2000cwu.googlegroups.com>
Message-ID: <173zmcrkmhees$.dlg@rikodespammed.com>

On 26 Feb 2006 14:55:04 -0800, Andrea Griffini wrote:

> IMO another language that would be hard to classify is COBOL ... but
> for other reasons :-)

According to Dijkstra:

"The use of COBOL cripples the mind; its teaching should, therefore, be
regarded as a criminal offence." 

That makes Cobol a Zen language (since it not only changes, but also
cripples the mind).

And BASIC too:
"It is practically impossible to teach good programming to students that
have had a prior exposure to BASIC: as potential programmers they are
mentally mutilated beyond hope of regeneration."

-- 
USB Priests for only 10$


From grahn+nntp at snipabacken.dyndns.org  Mon Feb  6 18:04:35 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 6 Feb 2006 23:04:35 GMT
Subject: Code Feedback
References: <1139247238.520281.144670@f14g2000cwb.googlegroups.com>
Message-ID: <slrnduflf8.2t1.grahn+nntp@frailea.sa.invalid>

On 6 Feb 2006 09:33:58 -0800, mwt <michaeltaft at gmail.com> wrote:
> Hello -
> Last night I wrote my first code in Python -- a little
> producer/consumer toy to help me begin to understand things. The
> "Library" only has a few books. You can choose how many Readers are
...
> 1) Is this good Python code?

Can't say, but it makes a pretty good reading list[0].

>         self.stacks = ["Heart of Darkness", "Die Verwandlung", "Lord of
> the Flies", "For Whom the Bell Tolls", "Dubliners", "Cyrano de
> Bergerac"]

You might want to look into using doc strings properly. You have comments at
the start of functions, but they read more like implementation notes than
"what this method does and why". But I only had a quick look.

/Jorgen
[0] Note to self: pick up some Joseph Conrad later this week.

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From martin.witte at gmail.com  Mon Feb 13 13:32:07 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 13 Feb 2006 10:32:07 -0800
Subject: Location of Python modules
In-Reply-To: <1139854184.504114.46690@z14g2000cwz.googlegroups.com>
References: <1139854184.504114.46690@z14g2000cwz.googlegroups.com>
Message-ID: <1139855527.418113.129180@o13g2000cwo.googlegroups.com>

martin at jordaan:~$ python
Python 2.4.2 (#2, Sep 30 2005, 21:19:01)
They are in one of the directories listed in sys.path, for me this is:
[GCC 4.0.2 20050808 (prerelease) (Ubuntu 4.0.1-4ubuntu8)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> print sys.path
['', '/usr/lib/python24.zip', '/usr/lib/python2.4',
'/usr/lib/python2.4/plat-linux2', '/usr/lib/python2.4/lib-tk',
'/usr/lib/python2.4/lib-dynload',
'/usr/local/lib/python2.4/site-packages',
'/usr/lib/python2.4/site-packages',
'/usr/lib/python2.4/site-packages/HTMLgen',
'/usr/lib/python2.4/site-packages/Numeric',
'/usr/lib/python2.4/site-packages/PIL',
'/usr/lib/python2.4/site-packages/cairo',
'/usr/lib/python2.4/site-packages/gtk-2.0']
>>>

see http://docs.python.org/lib/module-sys.html



From a.schmolck at gmail.com  Sun Feb 19 11:29:30 2006
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: 19 Feb 2006 16:29:30 +0000
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<mailman.2117.1140328473.27775.python-list@python.org>
Message-ID: <yfswtfrpb11.fsf@oc.ex.ac.uk>

"Terry Reedy" <tjreedy at udel.edu> writes:

> <63q2o4i02 at sneakemail.com> wrote in message 
> news:1140324074.458446.227480 at z14g2000cwz.googlegroups.com...
> > In learning Python I've read more about Lisp than when I was actually
> > trying to learn it, and it seems that the two languages have lots of
> > similarities:
> >
> > http://www.norvig.com/python-lisp.html
> >
> > I'm wondering if someone can explain to me please what it is about
> > Python that is so different from Lisp that it can't be compiled into
> > something as fast as compiled Lisp?  From this above website and
> > others, I've learned that compiled Lisp can be nearly as fast as C/C++,
> 
> In order to be that fast, some of the dynamism of intepreted Lisp must be 
> given up.  In particular object code is not list data.  

I'm not entirely sure what you are talking about, but you're almost certainly
very confused about something. Not all common lisp implementations even have
an interpreter (which doesn't tend to be visible to the user).

'as



From michaeltaft at gmail.com  Sun Feb 12 01:26:08 2006
From: michaeltaft at gmail.com (mwt)
Date: 11 Feb 2006 22:26:08 -0800
Subject: Clearing the screen
In-Reply-To: <mailman.1761.1139688853.27775.python-list@python.org>
References: <1139688262.046667.296940@g14g2000cwa.googlegroups.com>
	<mailman.1761.1139688853.27775.python-list@python.org>
Message-ID: <1139725568.890659.253770@f14g2000cwb.googlegroups.com>

I can't seem to get that to behave properly. It works fine in a python
shell, like you're demonstrating it, but not as a command in a module.



From deets at nospam.web.de  Sun Feb 26 16:51:28 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 26 Feb 2006 22:51:28 +0100
Subject: python newbie question
In-Reply-To: <1140990272.596746.150530@e56g2000cwe.googlegroups.com>
References: <1140990272.596746.150530@e56g2000cwe.googlegroups.com>
Message-ID: <46em71Fasdd8U1@uni-berlin.de>

ken.carlino at gmail.com schrieb:
> I am new to python, can you please tell me how can I convert my python
> script into an executable on linux?
> i.e. instead of typing 'python myscript.py abc', I just need to do
> 'myscript.py abc'?
> and how can I get the input argument from my script , in my example,
> how can I read 'abc'?

You need a shebang on top of your script, like this:

#!/usr/bin/python


Don't forget to chmod a+x <script>

And for the args: that's sys.argv, and better even optparse.

Diez



From bignose+hates-spam at benfinney.id.au  Fri Feb 17 05:47:37 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 17 Feb 2006 21:47:37 +1100
Subject: Open Relay Test
References: <1140150719.298606.9710@g44g2000cwa.googlegroups.com>
Message-ID: <871wy2cldi.fsf@rose.polar.local>

"D" <duncanm255 at hotmail.com> writes:
> Hi all .. how could one test to see if an open relay exists on a
> specific email server?

Use the Distributed Sender Blackhole List service:

    <URL:http://dsbl.org/>

They have client programs to make it easy to use the service to test
mail systems for vulnerabilities:

    <URL:http://dsbl.org/programs>

-- 
 \     "Buy not what you want, but what you need; what you do not need |
  `\           is expensive at a penny."  -- Cato, 234-149 BC, Relique |
_o__)                                                                  |
Ben Finney <http://www.benfinney.id.au/>


From jimmy at retzlaff.com  Mon Feb 13 09:27:23 2006
From: jimmy at retzlaff.com (Jimmy Retzlaff)
Date: Mon, 13 Feb 2006 06:27:23 -0800
Subject: py2exe 0.6.4 released
Message-ID: <A7B5C22F20EE3C4E95744E2F03F1887F455FFF@MAYOR.retzlaff.com>

py2exe 0.6.4 released
=====================

py2exe is a Python distutils extension which converts Python scripts
into executable Windows programs, able to run without requiring a
Python installation. Console and Windows (GUI) applications, Windows
NT services, exe and dll COM servers are supported.

Changes in 0.6.4:

    * New skip-archive option which copies the Python bytecode files
      directly into the dist directory and subdirectories - no
      archive is used.

    * An experimental new custom-boot-script option which allows a
      boot script to be specified (e.g., --custom-boot-script=cbs.py)
      which can do things like installing a customized stdout
      blackhole. See py2exe's boot_common.py for examples of what can
      be done. The custom boot script is executed during startup of
      the executable immediately after boot_common.py is executed.

    * Thomas Heller's performance improvements for finding needed
      modules.

    * Mark Hammond's fix for thread-state errors when a py2exe
      created executable tries to use a py2exe created COM DLL.

Changes in 0.6.3:

    * First release assembled by py2exe's new maintainer, Jimmy
      Retzlaff. Code changes in this release are from Thomas Heller
      and Gordon Scott.

    * The dll-excludes option is now available on the command line.
      It was only possible to specify that in the options argument to
      the setup function before.

      The dll-excludes option can now be used to filter out dlls like
      msvcr71.dll or even w9xpopen.exe.

    * Fix from Gordon Scott: py2exe crashed copying extension modules
      in packages.

Changes in 0.6.2:

    * Several important bugfixes:

      - bundled extensions in packages did not work correctly, this
        made the wxPython single-file sample fail with newer wxPython
        versions.

      - occasionally dlls/pyds were loaded twice, with very strange
        effects.

      - the source distribution was not complete.

      - it is now possible to build a debug version of py2exe.

Changes in 0.6.1:

    * py2exe can now bundle binary extensions and dlls into the
      library-archive or the executable itself.  This allows to
      finally build real single-file executables.

      The bundled dlls and pyds are loaded at runtime by some special
      code that emulates the Windows LoadLibrary function - they are
      never unpacked to the file system.

      This part of the code is distributed under the MPL 1.1, so this
      license is now pulled in by py2exe.

    * By default py2exe now includes the codecs module and the
      encodings package.

    * Several other fixes.

Homepage:

    <http://www.py2exe.org>

Download from the usual location:

    <http://sourceforge.net/project/showfiles.php?group_id=15583>

Enjoy,
Jimmy


From aleaxit at yahoo.com  Sun Feb 26 20:20:02 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 26 Feb 2006 17:20:02 -0800
Subject: Local variables initialization
References: <dttf62$qng$1@news.onet.pl>
	<1hbdjrw.1lrbcv8k3kcbsN%aleaxit@yahoo.com>
	<dttjb7$ba8$1@news.onet.pl>
Message-ID: <1hbdmaq.9h7q9m1urzg1oN%aleaxit@yahoo.com>

Michal Kwiatkowski <ruby at no.spam> wrote:
   ...
> The problem wouldn't be such a problem if Python had implicit self...
> but on the other side, it's another ambiguity.

In your example, you could avoid assigning var_one, but the purpose of
assigning var_two and empty_list obviously would not go away with
implicit self (and attendant ambiguities).


> Well, maybe you can help me in refactoring this code, so that it won't
> be such a pain to easily modify groups of methods? I'm thinking about this:
> 
> def init_arguments(fun):
>     def new_f(self):
>         var_one = self.attr_one
>         var_two = self.attr_two.another_attr
>         empty_list = []
> 
>         fun(self, var_one, var_two, empty_list)

You probably want a 'return fun(...)' here, for generality.

>     return new_f
> 
> @init_arguments
> def method(self, var_one, var_two, empty_list):
>     # significant code goes here
>     # ...
> 
> But the bad thing about this approach is that actual method doesn't
> really look like its definition, because of different number of arguments.

Yep, but to avoid black magic those names DO have to be identified as
locals to the compiler at the time of the 'def method(...', which
happens before the decorator gets to play.  If you're keen on using
those barenames as locals in method, there's no clean way out.

Personally, I would give up on the bareness of the names and bunch them
up into a specially named bunch, say _ (single underscore) assuming you
don't need that for other purposes such as i18n.  The method's signature
would be a formulaic 'def method(_, self [other args if any])' -- or you
could swap _ and self, if you wish; and the decorator could supply as _
a magic object (nothing black about it;-) with the suitable behavior,
not just for getting attributes, but also for setting them. If you're
sure you don't need to set them, then a simple Bunch instance with the
usual 'class Bunch: pass', or any other such approach, will suffice.

But of course, then the method's body would have to use _.one rather
than var_one, _.two rather than var_two, and _.empty_list rather than
empty_list (what a strange name -- does it STAY empty throughout the
method's execution?!).  To me this looks like a small price to pay, and
the 'def method(_, self, ...)' signature a clear, strong indication that
something weird, but not TOO weird, is going on. YMMV...


Alex


From kent at kentsjohnson.com  Thu Feb  9 11:55:53 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Thu, 09 Feb 2006 11:55:53 -0500
Subject: Finding the public callables of self
In-Reply-To: <1139501230.964886.190500@g43g2000cwa.googlegroups.com>
References: <1139501230.964886.190500@g43g2000cwa.googlegroups.com>
Message-ID: <43eb6fd8$1_3@newspeer2.tds.net>

Russell Warren wrote:
> Is there any better way to get a list of the public callables of self
> other than this?
> 
>     myCallables = []
>     classDir = dir(self)
>     for s in classDir:
>       attr = self.__getattribute__(s)
>       if callable(attr) and (not s.startswith("_")):
>         myCallables.append(s) #collect the names (not funcs)
> 

> I don't mean a shorter list comprehension or something that just drops
> the line count, but whether or not I need to go at it through dir and
> __getattribute__.  This seems a bit convoluted and with python it often
> seems there's something already canned to do stuff like this when I do
> it.  

Use getattr(self, s) instead of self.__getattribute__(s).

You could streamline it a bit with a list comprehension:
myCallables = [ s for s in dir(self) if not s.startswith('_') and 
callable(getattr(self, s)) ]

At first I thought self.__dict__ would do it, but callable methods
> seem to be excluded so I had to resort to dir, and deal with the
> strings it gives me.

The callables are attributes of the class and its base classes, not of 
self. self.__dict__ just contains instance attributes.

Kent


From rabkin at mweb[DOT]co[DOT]za  Sat Feb  4 17:34:23 2006
From: rabkin at mweb[DOT]co[DOT]za (Max)
Date: Sun, 05 Feb 2006 00:34:23 +0200
Subject: Generators vs. Functions?
In-Reply-To: <mailman.1422.1139085230.27775.python-list@python.org>
References: <0001HW.C00ABC2B000323A6F0335550@news.individual.de>
	<mailman.1422.1139085230.27775.python-list@python.org>
Message-ID: <Q7adnfWpFpxvtnjeRVn-pA@is.co.za>

Joseph Garvin wrote:
> 
> I am not a CPython or PyPy hacker, but I would guess that it will always 
> be slower as a matter of principal. When resuming a generator you have 
> to resetup the state the function was in when it was last called, which 
> I think should always be more costly than calling the function with a 
> clean state.
> 
> Someone want to correct me?

In cases where there are thousands of (large) values to return, the list 
(as returned by the function) may be large enough to require memory 
paging, whereas the generator only returns one value at a time.

> 
> Whether or not the difference is that significant though I am unsure. It 
> may be small enough that for most applications no one cares.

I just wrote an application which retrieves values from a 300mb 
database, and got a significant speedup using iterators.

--Max


From aaronwmail-usenet at yahoo.com  Mon Feb  6 00:11:48 2006
From: aaronwmail-usenet at yahoo.com (aaronwmail-usenet at yahoo.com)
Date: 5 Feb 2006 21:11:48 -0800
Subject: AJAX example code available
Message-ID: <1139202707.962836.140780@z14g2000cwz.googlegroups.com>


I've published sample code that uses Python
on the server side to implement AJAX
type ahead completion for web forms.  Please see
documentation with links to examples and downloads at

http://xsdb.sourceforge.net/xFeed.html

"Type ahead completion" is a form of AJAX
(asyncronous javascript with XML) functionality
where the page attempts to suggest completions
for partial form values by consulting a
web server component in the background.  Google Suggest
is a famous example.  For examples using
my python code please see

http://www.xfeedme.com/zip/zipcompletions_async.html or
http://www.xfeedme.com/xsdbXML/xFeed/BookMatch.html.

These pages must be viewed with a recent browser such
as FireFox 1.5, Safari 2.0, or IE 6.0.

The AJAX server component is configured for use
either as a Python CGI script or as a Apache server mod-python
module.

I hope you enjoy it and use it well :).
Please let me know if you have problems with it
or other comments.

  Thanks!  -- Aaron Watters

===
Chemistry may lead to a better life,
but Biology is more fun.  -- seen on a teeshirt



From jodawi.spamtrap at gmail.com  Tue Feb 14 02:07:53 2006
From: jodawi.spamtrap at gmail.com (jodawi)
Date: 13 Feb 2006 23:07:53 -0800
Subject: 88k regex = RuntimeError
Message-ID: <1139900873.361930.135880@g44g2000cwa.googlegroups.com>

I need to find a bunch of C function declarations by searching
thousands of source or html files for thousands of known function
names. My initial simple approach was to do this:

rxAllSupported = re.compile(r"\b(" + "|".join(gAllSupported) + r")\b")
# giving a regex of   \b(AAFoo|ABFoo|   (uh... 88kb more...)   |zFoo)\b

for root, dirs, files in os.walk( ... ):
...
    for fileName in files:
...
        filePath = os.path.join(root, fileName)
        file = open(filePath, "r")
        contents = file.read()
...
        result = re.search(rxAllSupported, contents)

but this happens:

    result = re.search(rxAllSupported, contents)
  File "C:\Python24\Lib\sre.py", line 134, in search
    return _compile(pattern, flags).search(string)
RuntimeError: internal error in regular expression engine

I assume it's hitting some limit, but don't know where the limit is to
remove it. I tried stepping into it repeatedly with Komodo, but didn't
see the problem.

Suggestions?



From jason.w.kane at gmail.com  Wed Feb 22 19:03:16 2006
From: jason.w.kane at gmail.com (Kane)
Date: 22 Feb 2006 16:03:16 -0800
Subject: quick script to read digital terrain elevation data?
References: <1140636896.760894.311440@g47g2000cwa.googlegroups.com>
Message-ID: <1140652996.642177.222640@o13g2000cwo.googlegroups.com>

I have some in-house python for dem2xyz but it isn't pretty.  I would
suggest starting with ftp.blm.gov/pub/gis/dem2xyz6.zip ; it is a C
program with source for just such conversions (my initial dem2xyz.py is
a direct python rewrite of the C code).  I think it's actually easier
to read in C (when reading C I expect C conventions, when reading
python I expect Python, this is C written in python and it gives off an
ugly vibe)

Sorry so long, the task is more complicated than a quick small script.

Anyway, for what it is worth:
------------------------------------------------
#Python rewrite of 'DEM2XYZ.C' which isn't a friendly compile
# slower than C, sure.  But it should work on Win and UNIX without any
hassles.
#if this reads like a C program you know why.  Sorry ;)

####
## from 'DEM2XYZ6.ZIP pulled from ftp.blm.gov
#
#  Origional Header comments:
#      convert dem to x, y, z format, one dem profile at a time,
#      converts 3 arc second to lat/long,  sol katz, mar. 94,
#      added sampling and cutting to size, sol katz, apr 94
#      changed the calculation of start position in sampling code,
#                                          sol katz, jan 95
#      ver 4, got rid of last 160 bytes on header line. sol katz, mar
97

class DEM:
    mapLabel = None
    DEMlevel = None
    elevationPattern = None
    groundSystem = None
    groundZone = None
    projectParams = []
    planeUnitOfMeasure = None
    elevUnitOfMeasure = None
    polygonSizes = None
    groundCoords = {}
    elevBounds = None
    localRotation = None
    accuracyCode = None

    #((),(),())
    spatialResolution = ()

    profileDimension = None
    unknownA = None
    unknownB = None
    unknownC = None
    unknownD = None
    unknownE = None
    unknownF = None
    unknownG = None
    unknownH = None

    colStr = 0
    def writeNormal(self, oh, XCoord, YCoord):
        if self.spatialResolution[1] == 3.0:
            #3 degrees of arc
            XCoord = XCoord / 3600.0
            YCoord = YCoord / 3600.0

        self.cellCount = 0

        for r in range(self.firstRow, self.lastRow, self.rowInt):
            #scale the raw value
            tempFloat = float(self.base[r]) * self.verticalScale
            oh.write("%f %f %i\n" % (XCoord, YCoord, int(tempFloat)))
            self.cellCount += 1
            #move up the delta y distance
            YCoord += self.deltaY
        return None

    def writeSubset(self, oh, XCoord, YCoord):
        return None

    def getheader(self, fh):
        print ""
        self.mapLabel = fh.read(144)
        print "Map label: %s" % self.mapLabel

        self.DEMlevel = int(fh.read(6))
        print "DEMlevel: %i" % self.DEMlevel

        self.elevationPattern = int(fh.read(6))
        print "elevation Pattern: %i" % self.elevationPattern

        self.groundSystem = int(fh.read(6))
        print "planimetric reference system: %i" % self.groundSystem

        self.groundZone = int(fh.read(6))
        print "ground Zone: %i" % self.groundZone

        #pull off 15, 24 byte sections and store in projectParams list
        for k in range(5):
            for l in range(3):
                value = fh.read(24)
                #we need to handle the exponent.. a simple float()
ain't doing the trick.
                self.projectParams.append(float(value.replace("D",
"E")))
        print "proj: %15.7f %15.7f %15.7f" % (self.projectParams[-3],
self.projectParams[-2], self.projectParams[-1])

        self.planeUnitOfMeasure = int(fh.read(6))
        print "plane Unit Of Measure: %i" % self.planeUnitOfMeasure

        self.elevUnitOfMeasure = int(fh.read(6))
        print "elevation measurement units code: %i" %
self.elevUnitOfMeasure

        self.polygonSizes = int(fh.read(6))
        print "polygon Sides: %i" % self.polygonSizes

        #nested list, ((lat,lng),(lat,lng),(lat,lng),(lat,lng))
        for k in ["NW", "NE", "SW", "SE"]:
            #NW, NE, SW, SE
            lat = float(fh.read(24).replace("D", "E"))
            lng = float(fh.read(24).replace("D", "E"))

            self.groundCoords[k] = (lat, lng)
            print "%s (%15.5f, %15.5f)" % (k, lat, lng)

        self.elevBounds = (
            float(fh.read(24).replace("D", "E")),
            float(fh.read(24).replace("D", "E"))
            )

        self.localRotation = float(fh.read(24).replace("D", "E"))

        self.accuracyCode = fh.read(6)
        print "Min: %15.5f, Max: %15.5f, Accuracy Code: %s" %
(self.elevBounds[0], self.elevBounds[1], self.accuracyCode)

        self.spatialResolution = (
            float(fh.read(12)),
            float(fh.read(12)),
            float(fh.read(12))
            )

        print "Spatial Resolution: %15.5f, %15.5f, %15.5f" %
(self.spatialResolution[0],

self.spatialResolution[1],

self.spatialResolution[2]
                                                              )

        self.profileDimension = (
            int(fh.read(6)),
            int(fh.read(6))
            )
        print "map size is %i x %i" % (self.profileDimension[0],
self.profileDimension[1])
        #dump the next 160 bytes
        self.unknownA = fh.read(6)
        self.unknownB = fh.read(16)
        self.unknownC = fh.read(2)
        self.unknownD = fh.read(2)
        self.unknownE = fh.read(2)
        self.unknownF = fh.read(4)
        self.unknownG = fh.read(4)
        self.unknownH = fh.read(124)

        return None

    def processProfiles(self, fh, oh):
        lastProfile = 0
        for c in range(self.columnCount):
            print "Working on column %s" % c
            current, next = fh.read(6), fh.read(6)
            try:
                profileID = {"current": int(current), "next":
int(next)}
            except:
                raise "Failed: %s, %s" % (repr(current), repr(next))

            print repr(profileID)
            #profileID = (fh.read(6), int(fh.read(6)))
            profileSize = {"alpha": int(fh.read(6)), "beta":
fh.read(6)}
            print repr(profileSize)
            #profileSize = (int(fh.read(6)), int(fh.read(6)))

            planCoords = (
                float(fh.read(24).replace("D", "E")),
                float(fh.read(24).replace("D", "E")),
                )
            print "planCoords: %15.5f, %15.5f" % planCoords

            localElevation = float(fh.read(24).replace("D", "E"))
            elevExtremea = (
                float(fh.read(24).replace("D", "E")),
                float(fh.read(24).replace("D", "E"))
                )

            #'kludge to force the end of processing'???
            #if (profileID["current"] - 1) != lastProfile:
            #    print "%s - 1 != %s" % (profileID["current"],
lastProfile)
            #    print "%i lines were written to the file" %
self.cellCount
            #    return None

            lastProfile = profileID["next"]
            print "Column %i has %i rows" % (profileID["next"],
profileSize["alpha"])
            self.firstRow = int(planCoords[1] - self.southMostSample) /
self.spatialResolution[1]

            self.lastRow = self.firstRow + profileSize["alpha"]

            #skip ahead to the first row
            self.base = []
            for r in range(self.firstRow):
                self.base.append(0)

            for r in range(self.firstRow, self.lastRow):
                value = fh.read(6)
                print self.firstRow, r, self.lastRow, repr(value)
                try:
                    self.base.append(int(value))
                except:
                    raise "the horrors of war!"
                    #self.base.append(int(fh.read(3)))

            #if cutting out a section, adjust the rows
            if outType == 2:
                #subset
                self.firstRow = rowStr
                planCoords[1] = planCoords[1] + (self.firstRow - 1) *
self.deltaY
                lastRow = max(lastRow, rowEnd)

            mod = c % colInt
            if mod == 0 and c >= self.colStr:
                if outType == 2:
                    writeSubset(oh, planCoords[0], planCoords[1])
                else:
                    D.writeNormal(oh, planCoords[0], planCoords[1])

            #trailer bytes?
            #fh.read(424)

        return None

YMAX = 2048
XMAX = 2048
SW = 0
NW = 1
NE = 2
SE = 3

infile = "/home/jkane/pypov-0.0.2/rawdata/1843.CDO"

print "DEM to x,y,z ascii file, Python variation based on C version 6"
print "  Python version by Jason Kane, BroadLink Communications 2004"
print "  C version by Sol Katz, BLM April 1997"

fh = open(infile)
D = DEM()
D.getheader(fh)

D.verticalScale = 1.0

#easy enough...
if D.spatialResolution[0] == 3.0:
    comp = 2.0
    D.deltaY = D.spatialResolution[0] / 3600
else:
    comp = 0.0
    D.deltaY = D.spatialResolution[0]

D.eastMost = max(D.groundCoords["NE"][0], D.groundCoords["SE"][0])
D.westMost = min(D.groundCoords["NW"][0], D.groundCoords["SW"][0])
D.northMost = max(D.groundCoords["NE"][1], D.groundCoords["NW"][1])
D.southMost = min(D.groundCoords["SW"][1], D.groundCoords["SE"][1])

#trunc' up to nearest spatialResolution
D.eastMostSample = int(D.eastMost / D.spatialResolution[0]) *
int(D.spatialResolution[0])
D.westMostSample = int((D.westMost + comp) / D.spatialResolution[0]) *
int(D.spatialResolution[0])
D.northMostSample = int(D.northMost / D.spatialResolution[1]) *
int(D.spatialResolution[1])
D.southMostSample = int((D.southMost + comp) / D.spatialResolution[1])
* int(D.spatialResolution[1])

if D.spatialResolution == 3.0:
    #it's a 1x1 degree DEM
    print "eastMostSample: %10f, westMostSample: %10f" %
(D.eastMostSample / 3600, D.westMostSample / 3600)
    print "northMostSample: %10f, southMostSample: %10f" %
(D.northMostSample / 3600, D.southMostSample / 3600)

D.columnCount = (D.eastMostSample - D.westMostSample) /
int(D.spatialResolution[0]) + 1
D.rowCount = (D.northMostSample - D.southMostSample) /
int(D.spatialResolution[1]) + 1

if D.columnCount != D.profileDimension[1]:
    print "CALCULATED column Count %i != HEADER %i" % (D.columnCount,
D.profileDimension[1])
    print "will use SMALLER column Count"
    D.columnCount = min(D.profileDimension[1], D.columnCount)

print "number of rows %i, number of columns %i" % (D.rowCount,
D.columnCount)
colInt = 1
D.rowInt = 1
outType = input("Enter 0 for all, 1 for samples, 2 for subset : ")

if outType == 1:
    #samples
    colInt = input("Enter Column sample interval : ")
    D.rowInt = input("Enter row sample interval : ")
    D.deltaY = D.deltaY * D.rowInt

elif outType == 2:
    #subset
    D.colStr = input("Enter start column (from left) : ")
    colEnd = input("Enter end column (from left) : ")
    rowStr = input("Enter start row (from bottom) : ")
    rowEnd = input("Enter end row (from bottom) : ")

D.verticalScale = input("Enter a vertical scaling factor: ")

if (outType == 2 and D.columnCount > colEnd):
    D.columnCount = colEnd

outfile = "outfile.xyz"
oh = open(outfile, "w")

D.processProfiles(fh, oh)

print "%i lines were written to the file." % D.cellCount



From aleaxit at yahoo.com  Sun Feb 19 23:50:13 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 19 Feb 2006 20:50:13 -0800
Subject: Mac OS X Installation Problem
References: <yEncExpress_Rulz!_www.techsono.com_3223252257@firstva.com>
Message-ID: <1hb0xsp.1uhwlff13o5wjqN%aleaxit@yahoo.com>

<Matt> wrote:
   ...
> But this begs the question, how do we upgrade our Python installations if OS X
> needs a certain version? Do we leave the pre-installed version alone and run a
> second Python installation? I suppose that the various package installers
> would know how to do that, right?

Yes, and yes.  The state for MacOSX Python is a bit in transition right
now (what with the introduction of intel Macs, and therefore the need
for Universal binaries), but soon, I hope, it will settle to a point
where downloading and installing Python (2.4.2 or better) without
disturbing Apple's own Python (2.3.5) will be trivial -- stay tuned!


Alex


From greg.steffensen at gmail.com  Fri Feb 24 22:36:46 2006
From: greg.steffensen at gmail.com (gsteff)
Date: 24 Feb 2006 19:36:46 -0800
Subject: PyGTK + Glade = weird problem
In-Reply-To: <1140831896.360625.172620@p10g2000cwp.googlegroups.com>
References: <1140831896.360625.172620@p10g2000cwp.googlegroups.com>
Message-ID: <1140838606.845184.304500@u72g2000cwu.googlegroups.com>

We'd need to see your "scc.glade" file to be sure, but basically,
calling the "show" method on the "w_cadcli" object only shows it, not
the objects it contains.  Again, to be clear, showing a container
object doesn't automatically show the objects it contains.  In glade,
use the "common" tab of the property editor to make sure that the
"visible" property is set to "Yes" for all of the widgets in the
windows you want to show.  In general, if you always do that, you'll be
able to show or hide the entire window by simply calling "show" or
"hide" on the window object, like you're trying to do.

But this is just a guess; post your "scc.glade" file if the above
advice doesn't work.

Greg



From gregory.petrosyan at gmail.com  Thu Feb 23 07:54:37 2006
From: gregory.petrosyan at gmail.com (Gregory Petrosyan)
Date: 23 Feb 2006 04:54:37 -0800
Subject: What's up with this code?
In-Reply-To: <43fd08cf$1@nntp0.pdx.net>
References: <1140649331.924736.128420@g43g2000cwa.googlegroups.com>
	<43fd08cf$1@nntp0.pdx.net>
Message-ID: <1140699277.658249.280130@u72g2000cwu.googlegroups.com>

That's it! Thanks a lot!



From jzgoda at o2.usun.pl  Sun Feb 19 06:18:05 2006
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Sun, 19 Feb 2006 12:18:05 +0100
Subject: Komodo - Will it Lock Me In?
In-Reply-To: <yEncExpress_Rulz!_www.techsono.com_3223072898@firstva.com>
References: <yEncExpress_Rulz!_www.techsono.com_3223072898@firstva.com>
Message-ID: <dt9k62$f79$1@atlantis.news.tpi.pl>

Matt Trivisonno napisa?(a):

> Any other thoughts on Komodo? I am considering it because I am hoping to find 
> a solution to the install-packages-until-you-go-blind aspect of Python. 
> Setting up a serious, cross-platform, gui development environment is quite a 
> struggle for a newbie.

Komodo is nice and plays well with programmer, although it's still an
editor with few additions, available elsewhere for free (i.e. in PyDev
or even in "advanced editors" like jEdit or Kate).

-- 
Jarek Zgoda
http://jpa.berlios.de/


From johnjsal at NOSPAMgmail.com  Mon Feb 13 10:03:58 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 13 Feb 2006 15:03:58 GMT
Subject: how do you pronounce 'tuple'?
In-Reply-To: <eiUHf.7378$bd4.6826@edtnps84>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net> <eiUHf.7378$bd4.6826@edtnps84>
Message-ID: <yd1If.1599$No6.38148@news.tufts.edu>

Markus Wankus wrote:

> I'm not sure, but I think it is pronounced "m?nage ? trois".

LOL. You guys are hilarious. I think I made the right decision to start 
learning Python!  :)


From andreas at openrts.org  Wed Feb  1 05:21:46 2006
From: andreas at openrts.org (Andreas R.)
Date: Wed, 01 Feb 2006 11:21:46 +0100
Subject: OpenRTS - new OSS Python game
In-Reply-To: <slrndu128k.8gn.sybrenUSE@schuimige.unrealtower.org>
References: <drq0vt$62f$1@orkan.itea.ntnu.no>
	<slrndu128k.8gn.sybrenUSE@schuimige.unrealtower.org>
Message-ID: <drq23q$6om$1@orkan.itea.ntnu.no>

Sybren Stuvel wrote:
> To be honest, it looks very much like games from 1995...

The game has isometric graphics. It's possible to have nice isometric 
graphics, ie. look at Civilization 3.  Besides, there's a lot more to a 
good strategy game than good looks.


From aleaxit at yahoo.com  Tue Feb 21 11:12:12 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Tue, 21 Feb 2006 08:12:12 -0800
Subject: Multiple assignment and the expression on the right side
References: <dte84b$568$1@home.itg.ti.com>
	<1hb2v8p.stwgof10kmfz2N%aleaxit@yahoo.com>
	<dtef9b$a42$1@home.itg.ti.com>
Message-ID: <1hb3noz.s8uddo6yy6tpN%aleaxit@yahoo.com>

Suresh Jeevanandam <jm.suresh at gmail.com> wrote:
   ...
> I think I got confused because of "Each time" in the sentence which 
> gives a feeling that it gets executed several times. Maybe, It could 
> have been just written, "When the statement gets executed, the right 
> hand side is evaluated once, and the result is assigned to each of the
> target".

Ah, but that suggests to *ME* that if you have the statement in a loop,
the RHS executes only once (the first time).  Let's try:

"""
Each time the statement executes, the RHS expression is evaluated just
once, no matter how many targets are part of the statement. Each target
then gets bound to the single object returned by the expression, just as
if several simple assignments executed one after the other. 
"""

[[I'm using LHS and RHS in the 2nd edition, for extra conciseness, after
introducing the acronyms just once where I first use them]].

This seems to cover the bases:

a. RHS is evaluated EACH TIME the statement executes,
b. but for each such time, RHS is evaluated JUST ONCE.

and the addition of the "no matter" clause should pound the nail into
the coffin.  What do y'all think?


Thanks for the comments, by the way, and my apologies for reacting to
them rather snappily at first blush -- I had just spent a long weekend
mostly slaving on the 2nd edition, so I guess I was irritable, but
that's no excuse for my discourtesy: sorry. Comments and criticisms on
my work are in fact always welcome (submitting them as errata on
O'Reilly's site ensures I will see them, which isn't certain here),
since they give me the best chance to enhance the work's quality (it's
quite common for the author of some text to fail to see potential issues
with the text, which may trip some readers but appears to be perfect to
the author -- that's why two heads are better than one, and N>2 even
better than two!-).


So, again, thanks.

Alex


From onurb at xiludom.gro  Tue Feb 14 04:05:48 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Tue, 14 Feb 2006 10:05:48 +0100
Subject: Pythonic gui format?
In-Reply-To: <a9KdnTPXHOGOr2zenZ2dnUVZ_vidnZ2d@comcast.com>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<43f11990$0$667$626a54ce@news.free.fr>
	<a9KdnTPXHOGOr2zenZ2dnUVZ_vidnZ2d@comcast.com>
Message-ID: <43f19d88$0$4761$636a55ce@news.free.fr>

DH wrote:
> Bruno Desthuilliers wrote:
> 
>>> I am currently seeking for pythonic alternative for XML. 
>>
>>
>> A pretty obvious one is dicts and lists. What about (Q&D):
> 
> 
> That's like JSON: http://www.json.org/example.html

No, it's pure Python. It happens that JSON looks pretty close to Python,
but that's another point.

And BTW, you should have read the whole post - I was *also* mentionning
JSON as a possible alternative to XML.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From johnzenger at gmail.com  Fri Feb 24 10:55:29 2006
From: johnzenger at gmail.com (johnzenger at gmail.com)
Date: 24 Feb 2006 07:55:29 -0800
Subject: Regular expression fun. Repeated matching of a group Q
References: <1140794885.460929.223080@i39g2000cwa.googlegroups.com>
Message-ID: <1140796529.104793.54160@e56g2000cwe.googlegroups.com>

There's more to re than just sub.  How about:

sanesplit = re.split(r"</td><td>|<td>|</td>", text)
date = sanesplit[1]
times = times = [time for time in sanesplit if re.match("\d\d:\d\d",
time)]

... then "date" contains the date at the beginning of the line and
"times" contains all your times.



From tdelaney at avaya.com  Mon Feb 13 00:14:19 2006
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Mon, 13 Feb 2006 16:14:19 +1100
Subject: ordered sets operations on lists..
Message-ID: <2773CAC687FD5F4689F526998C7E4E5F4DB946@au3010avexu1.global.avaya.com>

Delaney, Timothy (Tim) wrote:

> Adding such optimisations to Python may improve it's benchmark scores,
                                                  ^^^^

Blegh! Time to give myself a good kicking!

Tim Delaney


From reply.in.the.newsgroup at my.address.is.invalid  Fri Feb 24 08:25:36 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Fri, 24 Feb 2006 14:25:36 +0100
Subject: A C-like if statement
References: <hp-dnY20cusOnGPeRVn-rg@nmt.edu> <dtl04p$5q2$1@reader2.panix.com>
	<sdadnS6nfNnbmmPeRVn-sw@nmt.edu>
	<pan.2006.02.23.22.14.53.56541@REMOVETHIScyber.com.au>
	<1140742149.011750.321530@z34g2000cwc.googlegroups.com>
	<pan.2006.02.24.09.58.32.497698@REMOVETHIScyber.com.au>
	<1140775322.788083.256970@v46g2000cwv.googlegroups.com>
	<pan.2006.02.24.11.07.19.764837@REMOVETHIScyber.com.au>
	<roy-5A1B56.08034924022006@reader2.panix.com>
Message-ID: <h62uv1h5cbrnsd51dbria130q9c7d8annu@4ax.com>

Roy Smith:
>How do you do any I/O in a functional language if side effects are 
>verboten?  

The user is a function. Output is its parameter, input its return value.
The user is not allowed to maintain state ;-)

>For that matter, how does a functional program ever stop running?

By returning to the caller.

-- 
Ren? Pijlman


From Matt  Wed Feb 15 21:45:11 2006
From: Matt (Matt)
Date: Thu, 16 Feb 2006 02:45:11 GMT
Subject: Mac OS X - Deployment
Message-ID: <yEncExpress_Rulz!_www.techsono.com_3222902711@firstva.com>

James Stroud <jstroud at ucla.edu> wrote:

>py2app works for this. I'm not sure if it works from windows.

That's what I need,

Thanks,
Matt





From lists at fabis-site.net  Mon Feb 20 17:07:49 2006
From: lists at fabis-site.net (Fabian Steiner)
Date: Mon, 20 Feb 2006 23:07:49 +0100
Subject: PyQt and Threading to update a dialog?
Message-ID: <dtde8b$pbv$03$1@news.t-online.com>

Hello!

I have just written a MyDialog class which is derived from the orginial 
QDialog class. MyDialog only possesses a QLabel and a QPushButton. Now I 
would like to get the QLabel updated every second so that it displays 
the current time.
I think I will have to work with Threads in order to achieve this aim, 
but so far I didn't succeed in doing it because I couldn't find any 
examples.

Could anyone give me some hints or a piece of code?

Cheers,
Fabian Steiner


From marcus.tettmar at gmail.com  Fri Feb  3 12:18:57 2006
From: marcus.tettmar at gmail.com (marcus.tettmar at gmail.com)
Date: 3 Feb 2006 09:18:57 -0800
Subject: newbie - script works in PythonWin - fails from Python
In-Reply-To: <pan.2006.02.03.17.00.52.965138@REMOVETHIScyber.com.au>
References: <1138960717.927268.22640@g44g2000cwa.googlegroups.com>
	<1138961665.684357.78060@g44g2000cwa.googlegroups.com>
	<1138962543.290178.77790@g47g2000cwa.googlegroups.com>
	<pan.2006.02.03.11.04.13.213569@REMOVETHIScyber.com.au>
	<1138978837.557550.144350@f14g2000cwb.googlegroups.com>
	<pan.2006.02.03.17.00.52.965138@REMOVETHIScyber.com.au>
Message-ID: <1138987137.076549.281530@o13g2000cwo.googlegroups.com>

Hi,

Sorry, I'm not trying to make things hard!  I just can't figure why it
works when run from PythonWin and not from Python - PythonWin MUST load
some extra library.

Anyway, I have finally fixed it by adding import win32com to the top of
the script.  Am guessing the DLL uses COM and PythonWin must already
load it.



From bronger at physik.rwth-aachen.de  Thu Feb 23 06:54:44 2006
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Thu, 23 Feb 2006 12:54:44 +0100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com> <43fbc788@usenet01.boi.hp.com>
	<87u0ar3gba.fsf@wilson.homeunix.com>
	<pan.2006.02.22.11.35.14.90948@REMOVETHIScyber.com.au>
	<1140612537.685150.68330@o13g2000cwo.googlegroups.com>
	<7xu0arbkwd.fsf@ruckus.brouhaha.com>
	<1140614911.243300.67200@g47g2000cwa.googlegroups.com>
	<1140617119.964479.200780@g44g2000cwa.googlegroups.com>
	<1140639827.967115.169180@g44g2000cwa.googlegroups.com>
	<1140692367.189942.50520@z14g2000cwz.googlegroups.com>
Message-ID: <87r75uz3wb.fsf@wilson.homeunix.com>

Hall?chen!

"Paul Boddie" <paul at boddie.org.uk> writes:

> Kay Schluehr wrote:
>
>> I would say yes, it is still "proper Python" in that each RPython
>> program is also a CPython program.
>
> I suppose it depends on which direction you're coming from, in
> that many Python programs just wouldn't be able to run in
> RPython. But then I can understand the convenience of having a
> subset of Python that is executable by CPython, but which can also
> be inspected and processed for other purposes, and whose programs
> maintain their semantics in both situations.

I'm still afraid of the following scenario: Eventually, people might
regard "RPython plus type declarations" (or something similar) as
first-class Python because it's faster and runs on more
implementations, so they try to stick to it.  So effectively you
would have changed Python.

Maybe I misunderstood something because I could not follow all of
Kay's text but I think one should not change Python or create a
look-alike to allow for better implementations.  The language should
fit my brain rather than an implementation.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus            ICQ 264-296-646


From ronnyma at math.uio.no  Tue Feb 28 07:49:33 2006
From: ronnyma at math.uio.no (Ronny Mandal)
Date: Tue, 28 Feb 2006 13:49:33 +0100
Subject: Vectorization and Numeric (Newbie)
Message-ID: <Pine.LNX.4.63.0602281346010.18656@pantelleria.ifi.uio.no>

Assume you have a mathematical function, e.g. f(x) = x + 4

To calculate all the values from 1 to n, a loop is one alternative.

But to make this function work with vectors instead i.e
f(x_vector) = result_vector,
how should the function then be implemented?

Thanks

RM

--

Support bacteria - it's the only culture some people have!


From steve at holdenweb.com  Sat Feb 25 16:32:07 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 25 Feb 2006 16:32:07 -0500
Subject: Optimize flag question
In-Reply-To: <400BDC416E2A0042AA35DF3919BB8A5115E14B@mail.mtl.proksim.com>
References: <400BDC416E2A0042AA35DF3919BB8A5115E14B@mail.mtl.proksim.com>
Message-ID: <4400CCD7.7080109@holdenweb.com>

[copied to python-list]

Olivier Langlois wrote:
> Hi Steve!
> 
>>Could you outline the code that needs to be in to make the program
> 
> work,
> 
>>so we can assess the errors for ourselves?
>>
> 
> 
> There is nothing unfixable. There are some instances where the code is
> checking a function return value like:
> 
> assert(Somefunc())
> 
> which could fix with
> 
> res = Somefunc()
> assert(res)
> 
So what you are saying is that Somefunc() needs to be executed, 
presumably because it has side-effects?

Yes, it would be much better to recast it, but ...

> Some other functions rely on the AssertionError exception to indicate to
> the user that something went wrong instead of using a user defined
> exception.
> 

The real problem here is that you appear to be using AssertionError in 
an inappropriate way. If some caller passes an incorrect argument to 
your function, raise a ValueError. If you are passed the wrong type of 
data, raise a TypeError. And so on. Or, as you imply you thought about, 
raise a user-defined error.

Generally speaking you should reserve assert for circumstances where you 
expect some invariant condition to be true. Otherwise use an "if" 
statement and raise some other exception if the condition is True.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From paul at boddie.org.uk  Fri Feb 17 07:15:39 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 17 Feb 2006 04:15:39 -0800
Subject: Add a month
References: <1140173540.686250.205760@g44g2000cwa.googlegroups.com>
	<mailman.2046.1140175284.27775.python-list@python.org>
Message-ID: <1140178539.803209.84960@g47g2000cwa.googlegroups.com>

Fredrik Lundh wrote:
>
> what do you expect d_new to be after the operation ?  if the answer
> is date(2006,3,17), what's date(2006,1,31) plus one month?

February 31st, of course:

http://sql-info.de/mysql/gotchas.html#1_14

;-)

Paul



From jeff at schwabcenter.com  Wed Feb 22 13:49:10 2006
From: jeff at schwabcenter.com (Jeffrey Schwab)
Date: Wed, 22 Feb 2006 18:49:10 GMT
Subject: How to force creation of a .pyc?
In-Reply-To: <1140630718.197661.104730@o13g2000cwo.googlegroups.com>
References: <1140630718.197661.104730@o13g2000cwo.googlegroups.com>
Message-ID: <Gm2Lf.17270$915.3779@southeast.rr.com>

mrstephengross wrote:
> I would like to distribute a python program, but only in .pyc form (so
> that people cannot simply look at my code). Is there a way to do this?
> I've read up a little on the logic by which python creates .pyc's, and
> it sounds like python requires the main executed program to be in .py
> format. Any ideas?

Make a dummy script to import your main module.  The resulting pyc can 
be fed directly to the Python interpreter.

<---------------------------------------------------------------------->
# main.py : My main source code.  I cleverly will distribute only the
# byte code, such that no one knows my secrets.  D'oh!  You caught me
# monologging again...

if __name__ == "__main__":
	print "Ha!  Now you can't see me."
<---------------------------------------------------------------------->
# dummy.py : Imports the main module to create main.pyc.

import main
<---------------------------------------------------------------------->
[some client's prompt]% python main.py
Ha!  Now you can't see me.


From peter.mosley at talk21.com  Thu Feb  9 03:59:29 2006
From: peter.mosley at talk21.com (peter.mosley at talk21.com)
Date: 9 Feb 2006 00:59:29 -0800
Subject: Unable to get PIL to load jpeg images
References: <1139263113.552140.114100@o13g2000cwo.googlegroups.com>
	<1139315319.654694.285330@g43g2000cwa.googlegroups.com>
	<mailman.1545.1139316436.27775.python-list@python.org>
Message-ID: <1139475569.693965.249700@o13g2000cwo.googlegroups.com>


Thanks for that tip

Following a dialogue in that discussion group it is now working.  The
problem was that I didn't have the right jpeg library installed
(although what I had was enough to show jpegs in gThumb, GIMP and the
Gnome and KDE desktops so I don't understand why it wasn't). I had to
also install a jpeg development library, which fortunately was
available on my Fedora Core 3 installation disc.

A final glitch was that the previous broken build interfered with the
linking of PIL to the libraries.  I went for overkill, and deleted all
the PIL installation and site-packages directories, then reinstalled
from the original tarball.  This gave a curious glitch, in that the
first time I ran it it failed to load Tkinter with some obscure error
message, but on a retry everything was fine.  This worries me slightly,
as I don't know what happened and there is always a chance it could
happen again, but until it does I can't investigate it.

Slightly off topic, but I think my experience here is typical of any
installation on a Linux system, and illustrates why, despite huge
improvements over the last few years, Linux is not yet really suitable
for non expert use.

Thanks to everyone who's helped me over the last few months.

Peter



From johnjsal at NOSPAMgmail.com  Wed Feb 22 00:46:56 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 22 Feb 2006 00:46:56 -0500
Subject: a little more help with python server-side scripting
In-Reply-To: <mailman.2284.1140586348.27775.python-list@python.org>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>	<mailman.2280.1140581372.27775.python-list@python.org>	<JpidnVpklc7cembenZ2dnUVZ_tmdnZ2d@rcn.net>
	<mailman.2284.1140586348.27775.python-list@python.org>
Message-ID: <8t-dndPM0buNZmbeRVn-rA@rcn.net>

Steve Holden wrote:

> If the script ran, you will now know waht version of Apaceh you're 
> running with!

Well, the script did seem to run, but I'm still not sure if this is what 
I'm ultimately after. This allows me to run Python script files, which 
is good, but what I really want to do is write bits of Python code in my 
HTML files (as a means to include headers and footers, for example). So 
these bits of Python code will basically be like a PHP include() 
function that calls another HTML file which contains the header/footer 
HTML to insert into the calling file. This type of situation doesn't 
involve calling external Python scripts.

Maybe I can just try this also and see if it works, but I don't know the 
code to use to write such an include statement. What would the 
equivalent of this be in Python:

<?php include('file.html'); ?>

Thanks.


From MrJean1 at gmail.com  Mon Feb 27 15:06:57 2006
From: MrJean1 at gmail.com (MrJean1)
Date: 27 Feb 2006 12:06:57 -0800
Subject: Use of __slots__
In-Reply-To: <1hbepsi.1ms8ll98un954N%aleaxit@yahoo.com>
References: <dtt8ga$7b2$1@sea.gmane.org><dtt9o8$ams$1@sea.gmane.org>
	<mailman.2475.1141051433.27775.python-list@python.org>
	<1hbepsi.1ms8ll98un954N%aleaxit@yahoo.com>
Message-ID: <1141070817.692692.5100@i39g2000cwa.googlegroups.com>

An example of the RARE use case may be this particular one

  <http://mail.python.org/pipermail/python-list/2004-May/220513.html>

/Jean Brouwers



From anonymityisavirtue at 1111011010011.com  Tue Feb  7 21:02:37 2006
From: anonymityisavirtue at 1111011010011.com (TheSmokingGnu)
Date: Tue, 07 Feb 2006 18:02:37 -0800
Subject: Uses of The 4th Dimension (New Discovery by The Human Race!)
In-Reply-To: <1139317832.965864.129160@g43g2000cwa.googlegroups.com>
References: <1139317832.965864.129160@g43g2000cwa.googlegroups.com>
Message-ID: <3jcGf.79$KY2.42@fe04.lga>

But the real question is:

Will it walk the dog for me? Wipe my bottom after I use the bathroom? 
Clean my clock? Water the flowers? Cris-cross-cut my potatos?

I think not.

TheSmokingGnu


From mmarch at gmail.com  Sat Feb 25 02:34:17 2006
From: mmarch at gmail.com (Michael  March)
Date: 24 Feb 2006 23:34:17 -0800
Subject: Modifying body of select message in a 'mbox' file.
Message-ID: <1140852856.946605.281150@j33g2000cwa.googlegroups.com>

I am been playing with the 'email' and 'mailbox' modules trying to read
in an email at a time from an mbox file, add something to the body of a
message and then write that change back out in 'mbox' format again.

Is there any code floating around out there that allows you to take a
message from 'mailbox', modify it with 'email' and then write it back
out via 'mailbox' again?

thanks!



From donn at u.washington.edu  Fri Feb 17 14:37:11 2006
From: donn at u.washington.edu (Donn Cave)
Date: Fri, 17 Feb 2006 11:37:11 -0800
Subject: A way to discover PIDs of child processes?
References: <1140198823.896123.221240@g44g2000cwa.googlegroups.com>
Message-ID: <donn-18AFE0.11371117022006@gnus01.u.washington.edu>

In article <1140198823.896123.221240 at g44g2000cwa.googlegroups.com>,
 schreckmail at yahoo.com wrote:

> Now, because the command is executed in the shell, I end up with the
> following process tree:
> 
>       PID    PPID    PGID     WINPID  TTY  UID    STIME COMMAND
>      2332    3156    2332       3412  con 1012 15:34:11
> /usr/bin/python2.4
>      3068    2332    2332       2268  con 1012 15:34:11 /usr/bin/sh
>      1584    3068    2332       2620  con 1012 15:34:12
> /cygdrive/c/GNATPRO/5.01
> a/bin/powerpc-elf-gdb

It doesn't always have to be that way, depending on the
nature of the command.  If it's the last thing the shell
has to do, then it can be exec'ed without a fork, which
leaves the gdb image running in the immediate child process.

Some shells do that automatically.  In any case, a Bourne
shell "exec" statement will do it, like "exec /.../gdb",
with whatever redirections etc.

   Donn Cave, donn at u.washington.edu


From fuzzyman at gmail.com  Fri Feb  3 05:14:25 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 3 Feb 2006 02:14:25 -0800
Subject: newbie - script works in PythonWin - fails from Python
In-Reply-To: <1138960717.927268.22640@g44g2000cwa.googlegroups.com>
References: <1138960717.927268.22640@g44g2000cwa.googlegroups.com>
Message-ID: <1138961665.684357.78060@g44g2000cwa.googlegroups.com>


marcus.tettmar at gmail.com wrote:
> Hi,
>
> I have a script that runs fine when I run it from within PythonWin but
> causes a WindowsError: Exception when I try to run it from the command
> line using python.exe.  What is PythonWin doing differently?

Hello Marcus,

Can you post the full exception, and preferably the snippet of code
(with relevant context) that caused it. This will give people a better
chance of being able to help you.

All the best,


Fuzzyman
http://www.voidspace.org.uk/python/index.shtml



From steve at holdenweb.com  Sun Feb  5 23:33:39 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 06 Feb 2006 04:33:39 +0000
Subject: win32com, BSTR, and null terminated strings
In-Reply-To: <mzh5xzyr.fsf@qwhd746oihd49.net>
References: <mzh5xzyr.fsf@qwhd746oihd49.net>
Message-ID: <ds6jj0$vir$1@sea.gmane.org>

Matt Helm wrote:
> 
> I am using win32com to access a third party COM interface but am
> having trouble using the string that is returned.
> 
> The vendor's docs show the following method:
>  
>     HRESULT CookString(BSTR param_a, short buf_size, [out, retval] BSTR* result_b);
> 
> param_a is a string to be processed.
> buf_size is the size of the returned string + 1.
> 
> I can't know what the exact length of the returned string will be but
> it is safe to assume it will not exceed 80 chars.
>  
> I have been calling it as such:
> 
>     import win32com.client
> 
>     o = win32com.client.Dispatch("BFG9000.BFG9000")
> 
>     r = o.Cook("ABCDEFG", 81)
> 
> 
> r comes back as a Python string 81 chars in length with a null at the
> end of the actual valid text. In other words, it is your normal buffer
> containing a null terminated string.
> 
> Python treats the whole 81 chars as valid - even though most of the
> string is garbage. This is the expected behavior and I understand
> this.
> 
> However, what is the proper way to recover the actual string? I have
> been using:
> 
>     r.split("\0", 1)[0]
> 
> but it seems like a bit of a kludge.
> 

It's perfectly good Python, though, so just forget about it or wrap it 
in a "cstring(s)" function do you don't have to look at it!

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From diesch at spamfence.net  Sat Feb  4 13:26:32 2006
From: diesch at spamfence.net (Florian Diesch)
Date: Sat, 4 Feb 2006 19:26:32 +0100
Subject: OS.MKDIR( ) Overwriting previous folder created...
References: <1138916342.531311.190570@g14g2000cwa.googlegroups.com>
	<1138916709.368871.174290@z14g2000cwz.googlegroups.com>
	<1138917732.693000.280200@g14g2000cwa.googlegroups.com>
Message-ID: <20060204182632.77AD.3.NOFFLE@dieschf.news.arcor.de>

Ernesto <erniedude at gmail.com> wrote:
> NEVERMIND !  Here is the solution...
>
> # ----------------------------------------------------------------
> if (os.path.isdir("C:\\MyNewFolder") == 0):
> 	os.mkdir("C:\\MyNewFolder")
> # -----------------------------------------------------------------

Maybe some other process creates C:\\MyNewFolder between the call of
isdir and mkdir, or mkdir fails for some other reasons (e.g. no
permission), so you have to catch exceptions anyway. But then there's no
need for isdir.


   Florian
-- 
Das ist ja das positive am usenet: man erf?hrt oft Dinge, nach denen
gar nicht gefragt wurde.
[Konrad Wilhelm in <lsght1hho14bbe7in8q9currhtc7vuqfru at 4ax.com>]


From shalabh at cafepy.com  Sat Feb  4 17:35:41 2006
From: shalabh at cafepy.com (Shalabh Chaturvedi)
Date: Sat, 04 Feb 2006 14:35:41 -0800
Subject: fairly large webapp: from Java to Python. experiences?
In-Reply-To: <1139005746.363918.267370@g47g2000cwa.googlegroups.com>
References: <1139005746.363918.267370@g47g2000cwa.googlegroups.com>
Message-ID: <ds3a86$48l$1@sea.gmane.org>

john_sips_tea at yahoo.com wrote:
> I've got a fairly substantial webapp written in Java (plus Tomcat,
> Hibernate, Struts, JSP, MySQL) that is a bit of a bear to work with. I
> didn't write it. Much of it is only very sparsely documented (if at
> all). No design docs anywhere. It's a large webapp with many classes
> and fairly deep inheritance hierarchies. There seems to be JUnit test
> cases in place.
> 
> The possibility of re-writing it has come up, and I must say that,
> although it would likely be a ton of work, it could also be a real
> pythonic adventure. ;) 
<snip>
> Any tips, stories, recommendations, and/or experiences are most
> welcome.
> 

A class-to-class and method-to-method rewrite will give some but likely 
not the full benefit of moving to Python. A redesign might be necessary 
- making it more 'Pythonic' in the process. In my experience, many cruft 
classes that exist in a Java design simply disappear when ported to 
Python. See also http://dirtsimple.org/2004/12/python-is-not-java.html

Cheers,
Shalabh



From tbonejo at gmail.com  Thu Feb 23 09:22:57 2006
From: tbonejo at gmail.com (tbonejo at gmail.com)
Date: 23 Feb 2006 06:22:57 -0800
Subject: Get Root access in Linux?
In-Reply-To: <1140702432.302564.104270@g14g2000cwa.googlegroups.com>
References: <1140698762.654497.272490@o13g2000cwo.googlegroups.com>
	<465qp8F9hujdU1@uni-berlin.de>
	<1140702432.302564.104270@g14g2000cwa.googlegroups.com>
Message-ID: <1140704577.336961.286700@u72g2000cwu.googlegroups.com>

I was thinking you can do a shell call or something and pass the info
for root access.



From igouy at yahoo.com  Wed Feb 22 13:47:44 2006
From: igouy at yahoo.com (Isaac Gouy)
Date: 22 Feb 2006 10:47:44 -0800
Subject: Python vs. Lisp -- please explain
In-Reply-To: <pan.2006.02.21.22.15.59.192973@REMOVETHIScyber.com.au>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com>
	<mailman.2160.1140440898.27775.python-list@python.org>
	<1140454473.335788@jetspin.drizzle.com>
	<pan.2006.02.20.21.59.12.636908@REMOVETHIScyber.com.au>
	<1140490302.639049@jetspin.drizzle.com>
	<43FAD2C2.7080908@REMOVEMEcyber.com.au>
	<donn-F5C9CE.09462721022006@gnus01.u.washington.edu>
	<pan.2006.02.21.22.15.59.192973@REMOVETHIScyber.com.au>
Message-ID: <1140634064.708555.24520@g14g2000cwa.googlegroups.com>


Steven D'Aprano wrote:
> On Tue, 21 Feb 2006 09:46:27 -0800, Donn Cave wrote:
>
> > In article <43FAD2C2.7080908 at REMOVEMEcyber.com.au>,
> >  Steven D'Aprano <steve at REMOVEMEcyber.com.au> wrote:
> > ...
> >> Hey Donn, here is a compiled program for the PowerPC,
> >> or an ARM processor, or one of IBM's Big Iron
> >> mainframes. Or even a Commodore 64. What do you think
> >> the chances are that you can execute it on your
> >> x86-compatible PC? It's compiled, it should just
> >> work!!! Right?
> >>
> >> No of course not. If your CPU can't interpret the
> >> machine code correctly, the fact that the code is
> >> compiled makes NO difference at all.
>
> [snip for brevity]
>
> > Sure, all this is true, except for the term "interpreter."
> > You would surely not use the word that way, unless you
> > just didn't want to communicate.
>
> Do you honestly believe that the CPU doesn't have to interpret the machine
> code, or are you just deliberately playing silly buggers with language?
>
> In modern CPUs, there is an intermediate layer of micro-code between the
> machine code your C compiler generates and the actual instructions
> executed in hardware. But even if we limit ourselves to obsolete hardware
> without micro-code, I ask you think about what an interpreter does, and
> what the CPU does, in the most general way possible.
>
> Both take a stream of instructions. Both have to take each instruction,
> and execute it. In both cases the link between the instruction and the
> effect is indirect: for example, the machine code 00000101 on the
> Zilog Z80 processor causes the CPU to decrement the B processor register.
> In assembly language this would be written as DEC B. There is absolutely
> nothing fundamental about the byte value 5 that inherently means
> "decrement B processor register".
>
> In other words, machine language is a language, just like it says, and
> like all languages, it must be interpreted.
>
> > Your paragraph above that starts with "No of course not",
> > even omits a point that everyone understands, you can in
> > fact expect a .py file will work independent of machine
> > architecture - like any interpreted language.
>
> Amazing. In your previous post you were telling everybody how the
> *disadvantage* of interpreted programs is that they won't run unless the
> interpreter is present, and in this post you are telling us that
> interpreted languages will just work. What happened to the requirement for
> an interpreter?
>
> Let's see you run that Python program on a Zilog Z80 without a Python
> interpreter. Can't be done. No interpreter, whether in hardware or
> software, and the program won't run, whether in source code or byte code
> or machine code.
>
> If I allow that the machines have an interpreter, perhaps you'll return
> the favour and install an interpreter for machine language (often called
> an emulator). Now your compiled C or Lisp code also will run independent
> of machine architecture.
>
> In order to force "interpreted language" and "compiled language" into two
> distinct categories, rather than just two overlapping extremes of a single
> unified category, you have to ignore reality. You ignore interpreted
> languages that are compiled, you ignore the reality of how machine code is
> used in the CPU, you ignore the existence of emulators, and you ignore
> virtual machines.
>
>
> > We all know
> > what native code compilation buys you and what it doesn't.
>
> Did you fail to learn *anything* from my parable of interpreted Lisp on a
> Macintosh II running faster than compiled Lisp running on a Mac II fitted
> with a Lisp processor?
>
>
> --
> Steven

A different perspective:

"Although we refer to Lua as an interpreted language, Lua always
precompiles source code to an intermediate form before running it.
(This is not a big deal: Most interpreted languages do the same.) The
presence of a compilation phase may sound out of place in an
interpreted language like Lua. However, the distinguishing feature of
interpreted languages is not that they are not compiled, but that any
eventual compiler is part of the language runtime and that, therefore,
it is possible (and easy) to execute code generated on the fly. We may
say that the presence of a function like dofile is what allows Lua to
be called an interpreted language."

p57 Programming in Lua



From skip at pobox.com  Tue Feb  7 14:53:00 2006
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 7 Feb 2006 13:53:00 -0600
Subject: The problem of anonymity with decorators
In-Reply-To: <43e8c0bb$0$22678$79c14f64@nan-newsreader-07.noos.net>
References: <43e8c0bb$0$22678$79c14f64@nan-newsreader-07.noos.net>
Message-ID: <17384.64156.15274.890045@montanaro.dyndns.org>


    Franck> My problem is that the errors comes from a function named
    Franck> "wrapped" while I'd prefer to see here the name of the wrapped
    Franck> function.

Take a look at

    http://wiki.python.org/moin/PythonDecoratorLibrary

In particular, check out the Decorator decorator.

Skip


From max at alcyone.com  Tue Feb 14 04:31:29 2006
From: max at alcyone.com (Erik Max Francis)
Date: Tue, 14 Feb 2006 01:31:29 -0800
Subject: how do you pronounce 'tuple'?
In-Reply-To: <1139908126.190830.233130@z14g2000cwz.googlegroups.com>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
	<mailman.1857.1139863723.27775.python-list@python.org>
	<1139908126.190830.233130@z14g2000cwz.googlegroups.com>
Message-ID: <ApKdnZHt5ILsPmzenZ2dnUVZ_sadnZ2d@speakeasy.net>

Alan Kennedy wrote:

> [Terry Hancock]
>> So what's a 1-element tuple, anyway? A "mople"?  "monople"?
>> It does seem like this lopsided pythonic creature (1,) ought
>> to have a name to reflect its ugly, newbie-unfriendly
>> nature.
> 
> It's a "trip-you-uple", which you can pronounce anyway you like ;-)

All I hear there is "triple you up," which is good if you're in a poker 
tournament, which I suppose tells you where my mind has been lately.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   If there must be trouble let it be in my day, that my child may have
   peace. -- Thomas Paine


From vivainio at gmail.com  Fri Feb 17 14:49:06 2006
From: vivainio at gmail.com (Ville Vainio)
Date: 17 Feb 2006 11:49:06 -0800
Subject: Evil, evil wxPython (and a glimmer of hope)
References: <1140116551.116322.12680@g43g2000cwa.googlegroups.com>
	<8764ned5ib.fsf@rose.polar.local>
	<1140162638.200378.199010@g44g2000cwa.googlegroups.com>
	<1140174946.948658.186160@g47g2000cwa.googlegroups.com>
	<1140180680.326797.69740@g43g2000cwa.googlegroups.com>
	<1140189486.898380.245900@g14g2000cwa.googlegroups.com>
	<1140195001.515958.292420@g14g2000cwa.googlegroups.com>
	<87vevdsz2r.fsf@wilson.homeunix.com>
Message-ID: <1140205746.428780.226030@z14g2000cwz.googlegroups.com>

Torsten Bronger wrote:


> Has Wax exceeded the critical mass so that one can be quite certain
> that it will still be maintained, say, next year?  (Sincere question
> since I don't know.)

I was a bit worried about this myself, but after browsing the source I
have to say I'm not terribly so anymore. It's a relatively thin wrapper
over wxPython so you are *almost* using wxPython, but w/o a lot of the
pain & horror, and if Hans Nowak stopped paying attention to it the
maintenance tab could be picked up by someone else rather easily. Also,
wxPython 2.6 is a relatively recent arrival and it's supported, so the
next "breakage point" is relatively far away.

Frankly, I think the time saved by coding for Wax could even exceed the
hypothetical time wasted (in case Wax were discontinued) porting a
finished Wax-using product over to use straight wxPython.

Using Wax (and occasionally peeking at the source) also seems to be a
nice way to learn straight wxPython without being immersed in all the
grossness at once. ;-)



From martin at v.loewis.de  Sat Feb 11 19:04:14 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 12 Feb 2006 01:04:14 +0100
Subject: Netstat in python. Does it's possible?
In-Reply-To: <slrndusfol.2t1.grahn+nntp@frailea.sa.invalid>
References: <s1mHf.5180$9G6.428@tornado.fastwebnet.it>
	<43EE0286.5020409@v.loewis.de>
	<slrndusfol.2t1.grahn+nntp@frailea.sa.invalid>
Message-ID: <43EE7B7E.5050802@v.loewis.de>

Jorgen Grahn wrote:
> There might still be a problem for people doing things like this: netstat
> might use unstable or non-public APIs to find the things it lists. This is
> fine because it's typically your OS vendor who have to handle that (ship
> another netstat when the /proc or /sys file system layout changes, etc).

Right. However, on Unix, there aren't really that much "non-public"
APIs. If you can figure out what the system call number is, and you
have /usr/include/sys, you can typically come up with a way to call
this API.

It becomes tricky if netstat turns out to read /dev/kmem or some such.

> If it works like that, you can access the APIs fine from Python -- but you
> cannot write a portable 'pynetstat' without a lot of effort and maintenance.

Well, to make that accessible from Python, you need to have Python
wrappers for all system calls involved (or for library routines that
use the system calls the right way). In case of /proc, this is easy;
if it is a ioctl(2), it might still be doable. If it is something
else, you may have to write a Python wrapper for that other system
call first.

Regards,
Martin


From tim.hochberg at ieee.org  Sun Feb 12 03:08:16 2006
From: tim.hochberg at ieee.org (Tim Hochberg)
Date: Sun, 12 Feb 2006 01:08:16 -0700
Subject: Shortest prime number program
In-Reply-To: <l042c3-1lb.ln1@prcm.tecont.de>
References: <1139652226.869102.310180@g14g2000cwa.googlegroups.com>	<1139673716.241461.84110@g47g2000cwa.googlegroups.com>	<dsl4ae$l97$1@online.de>
	<l042c3-1lb.ln1@prcm.tecont.de>
Message-ID: <dsmqdj$flg$1@sea.gmane.org>


While not nearly the shortest proposed thus far, I'm fond of:

from itertools import count, ifilter
def sieve(s=count(2)):
  while 1:p=s.next();s=ifilter(p.__rmod__,s);yield p

It will generate quite a large number of primes before blowing up (at 
least 50,000 primes, p=611,957) and it's much faster than the other 
submissions thus far that can generate a more or less arbitrary number 
of primes. It's still much slower than Alex Martelli's version in the 
cookbook though.

[And yes I know that you can shave off one character by importing 
ifilter as i, but that's too much ick for too little gain. There may 
well be other, more fruitful ways to compact it though]

-tim



From kevin.dahlhausen at gmail.com  Fri Feb 24 10:27:23 2006
From: kevin.dahlhausen at gmail.com (kpd)
Date: 24 Feb 2006 07:27:23 -0800
Subject: pyFltk-1.1
In-Reply-To: <1140678079.994118.38570@g43g2000cwa.googlegroups.com>
References: <1140617661.603681.12250@z14g2000cwz.googlegroups.com>
	<mailman.2322.1140651210.27775.python-list@python.org>
	<1140678079.994118.38570@g43g2000cwa.googlegroups.com>
Message-ID: <1140794843.268005.243120@p10g2000cwp.googlegroups.com>

Andreas,

Congratulations, it's a well polished release.

For those not familiar with FLTK, there are many examples in the
Python24/pytfltk/test directory.



From mensanator at aol.com  Thu Feb  9 18:18:49 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 9 Feb 2006 15:18:49 -0800
Subject: Pulling all n-sized combinations from a list
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>
	<1139509392.890581.94470@g43g2000cwa.googlegroups.com>
	<mailman.1675.1139510184.27775.python-list@python.org>
	<1139513265.440321.184530@o13g2000cwo.googlegroups.com>
	<dsg601$ndh$1@wake.carmen.se>
Message-ID: <1139527129.367077.316590@g44g2000cwa.googlegroups.com>


Magnus Lycka wrote:
> mensanator at aol.com wrote:
> > Fredrik Lundh wrote:
> >>Windows don't support C ?  that was a new one.
> >
> >
> > Windows comes with a C compiler? That's news to me.
>
> It doesn't come with Python either. Both Python and
> the compiler etc that you need can be freely downloaded
> from the internet.

Just out of curiosity, have you ever tried it?

I _have_ downloaded Cygwin and was able to compile GMP
using gcc (after much wailing & gnashing of teeth). But using
the free SDK compiler from MS? That seems elusive. Lucky for me,
someone who had the non-free MS compiler was able to create
a Windows binary of GMPY or I'd still be SOL. If you don't have
the tools or don't know how to use them, the Windows C support
may as well be on the far side of the Moon for all the good it does
me.

> I suggest you leave the witty sarcasms to effbot.

I thought I was replying to a witty sarcasm.

> He might be a little annoying at times, but he know what he's talking about.



From fredrik at pythonware.com  Tue Feb 21 10:34:26 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 21 Feb 2006 16:34:26 +0100
Subject: Mutable numbers
References: <dteele$9pi$1@home.itg.ti.com><43fb2462$0$3211$636a55ce@news.free.fr>
	<43FB2EC4.50201@holdenweb.com>
Message-ID: <dtfbu2$kjh$1@sea.gmane.org>

Steve Holden wrote:

> > The memory allocation for integers is optimized. 'Small' integers
> > (between -5 and 100 IIRC) are allocated once and reused. The memory for
> > larger integers is allocated once and reused whenever possible, so the
> > malloc() overhead is negligible.
>
> The first bit's right, the second bit isn't:
>
>   >>> id(12100)
> 4604168
>   >>> id(121*100)
> 4604204
>   >>>

quoting from Objects/intobject.c :

   Integers are quite normal objects, to make object handling uniform.
   (Using odd pointers to represent integers would save much space
   but require extra checks for this special case throughout the code.)
   Since a typical Python program spends much of its time allocating
   and deallocating integers, these operations should be very fast.
   Therefore we use a dedicated allocation scheme with a much lower
   overhead (in space and time) than straight malloc(): a simple
   dedicated free list, filled when necessary with memory from malloc().

    http://svn.python.org/projects/python/trunk/Objects/intobject.c

</F> 





From fabioxgn at gmail.com  Sat Feb 25 13:50:09 2006
From: fabioxgn at gmail.com (sapo)
Date: 25 Feb 2006 10:50:09 -0800
Subject: PyGTK + Glade = weird problem
In-Reply-To: <1140841289.257523.124420@v46g2000cwv.googlegroups.com>
References: <1140831896.360625.172620@p10g2000cwp.googlegroups.com>
	<1140838606.845184.304500@u72g2000cwu.googlegroups.com>
	<1140839146.072788.25120@j33g2000cwa.googlegroups.com>
	<1140839902.199924.249180@z34g2000cwc.googlegroups.com>
	<1140841289.257523.124420@v46g2000cwv.googlegroups.com>
Message-ID: <1140893409.582122.13310@u72g2000cwu.googlegroups.com>

Finally solved this stuff, the problem wasnt with glade, the problem
was that i was using the "destroy" event in glade, i just changed the
"destroy" to "delete-event" and it worked like a charm.

thanx :)



From thierry.t.chevalier at gmail.com  Mon Feb 13 13:02:26 2006
From: thierry.t.chevalier at gmail.com (tooper)
Date: 13 Feb 2006 10:02:26 -0800
Subject: cx_Oracle string problems...
In-Reply-To: <1139850767.853237.122710@f14g2000cwb.googlegroups.com>
References: <1139850767.853237.122710@f14g2000cwb.googlegroups.com>
Message-ID: <1139852585.938381.247590@f14g2000cwb.googlegroups.com>

Looks like a space is missing before VALUES keyword ?



From bonono at gmail.com  Tue Feb  7 19:04:17 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 7 Feb 2006 16:04:17 -0800
Subject: Question about idioms for clearing a list
In-Reply-To: <mailman.1567.1139348019.27775.python-list@python.org>
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>
	<E78Gf.22893$Jd.14515@newssvr25.news.prodigy.net>
	<mailman.1567.1139348019.27775.python-list@python.org>
Message-ID: <1139355876.391746.45580@g44g2000cwa.googlegroups.com>


Fredrik Lundh wrote:
> > Python now has, what, three built-in mutable collections types:
> > lists, dictionaries, and sets. Dicts and sets both have a clear()
> > method and lists do not.
>
> dicts and sets are mappings, and lists are not.  mappings don't
> support slicing.  lists do.

I am confused. Could you explain this ? I was under the impression said
above(mapping don't support slicing), until after I read the language
reference. I don't think it is slicing as in the list slicing sense but
it does use the term "extend slicing".

http://www.python.org/doc/2.4.2/ref/slicings.html

"The semantics for an extended slicing are as follows. The primary must
evaluate to a mapping object, and it is indexed with a key that is
constructed from the slice list, as follows. If the slice list contains
at least one comma, the key is a tuple containing the conversion of the
slice items; otherwise, the conversion of the lone slice item is the
key. The conversion of a slice item that is an expression is that
expression. The conversion of an ellipsis slice item is the built-in
Ellipsis object. The conversion of a proper slice is a slice object
(see section 3.2) whose start, stop and step attributes are the values
of the expressions given as lower bound, upper bound and stride,
respectively, substituting None for missing expressions."



From wegwerp at gmail.com  Tue Feb 21 11:59:35 2006
From: wegwerp at gmail.com (Bas)
Date: 21 Feb 2006 08:59:35 -0800
Subject: algorithm, optimization, or other problem?
In-Reply-To: <mailman.2237.1140534918.27775.python-list@python.org>
References: <43FB0661.1040202@bryant.edu>
	<mailman.2237.1140534918.27775.python-list@python.org>
Message-ID: <1140541175.150430.315500@g44g2000cwa.googlegroups.com>

Hi,

as the others have already said, move all the invariants out of the
loop. It is also not useful to randomly draw a vector out of random
array. Some other small things:

for i in range(len(x)): do something with x[i]
should probably be replaced by
for xi in x: do something with xi
this saves an array index operation, don't know if this works for a
numeric array

You use the y**2 twice. A good compiler might notice this, but Python
is interpreted...

use += instead of + for w, the calculation can be done in place, this
might save the creation of a new array/variable

I am not sure what you are doing with x, bit it seems that you are
transposing it a few times to many. Mightbe you can declare x as the
transpose of what you do now, thereby saving the transpose in the loop?

so my guess (not tested):

x=random((1000,100))    # 1000 input vectors,  declared differently
for xx in x:
             y=dot(xx,w)
             y2 = y*y
             w+=ETA*(y*xx-y2*w);
             th+= INV_TAU*(y2-th); 


Hope it helps,
Bas



From alanmk at hotmail.com  Tue Feb 14 04:08:46 2006
From: alanmk at hotmail.com (Alan Kennedy)
Date: 14 Feb 2006 01:08:46 -0800
Subject: how do you pronounce 'tuple'?
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
	<mailman.1857.1139863723.27775.python-list@python.org>
Message-ID: <1139908126.190830.233130@z14g2000cwz.googlegroups.com>

[Terry Hancock]
> So what's a 1-element tuple, anyway? A "mople"?  "monople"?
> It does seem like this lopsided pythonic creature (1,) ought
> to have a name to reflect its ugly, newbie-unfriendly
> nature.

It's a "trip-you-uple", which you can pronounce anyway you like ;-)

--
alan kennedy
------------------------------------------------------
email alan:              http://xhaus.com/contact/alan



From hancock at anansispaceworks.com  Mon Feb 13 16:10:50 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Mon, 13 Feb 2006 15:10:50 -0600
Subject: how do you pronounce 'tuple'?
In-Reply-To: <F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
Message-ID: <20060213151050.525816ee@samwise.anansi>

On Sun, 12 Feb 2006 22:52:30 -0800
Erik Max Francis <max at alcyone.com> wrote:
> Even in mathematics, a tuple, or formally an n-tuple,
> makes more sense  to me pronounced the latter if you list
> out the various pronounciations  for large n, seems me the
> _uhs_ outweigh the _oos_.  (There's quadruple  on one
> side, but then quintuple, sextuple, septuple, heptuple,
> octuple,  etc., etc., etc.)

I doubt that helps much: I pronounce all of those words
(when I use them, which is not too often) as "-toopel". The
only tuple I pronounce with the "-uh-" is "couple", and I
usually call that a "two-tuple" when dealing with Python.

I suspect that even those who would pronounce 'quintuple'
"kwintuhpel" would say 'quintuplicate' as "kwinTOOPlikuht".
(that's the noun, not the verb, which is "kwintoopliKATE").

So what's a 1-element tuple, anyway? A "mople"?  "monople"?
It does seem like this lopsided pythonic creature (1,) ought
to have a name to reflect its ugly, newbie-unfriendly
nature.

Are we having fun yet? ;-)

Cheers,
Terry

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From ivilata at carabos.com  Tue Feb 21 07:21:22 2006
From: ivilata at carabos.com (Ivan Vilata i Balaguer)
Date: Tue, 21 Feb 2006 13:21:22 +0100
Subject: In need of a virtual filesystem / archive
In-Reply-To: <1140489584.412886.201420@g47g2000cwa.googlegroups.com>
References: <1140489584.412886.201420@g47g2000cwa.googlegroups.com>
Message-ID: <43FB05C2.4090005@carabos.com>

En/na Enigma Curry ha escrit::

> I need to store a large number of files in an archive. From Python, I
> need to be able to create an archive, put files into it, modify files
> that are already in it, and delete files already in it.
>[...]
> Is there any archive format that can allow Python to modify a file in
> the archive *in place*? That is to say if my archive is 2GB large and I
> have a small text file in the archive I want to be able to modify that
> small text file (or delete it) without having to rewrite the entire
> archive to disk.
>[...]

Although it is not its main usage, PyTables_ can be used to store
ordinary files in a single HDF5_ file.  HDF5 files have a hierarchical
structure of nodes and groups which maps quite well to files and
directories.  You can create, read, modify, copy, move and remove nodes
at will, freed space is reclaimed, and HDF5 is very efficient no matter
how large data is.

For working with the files, PyTables includes a FileNode_ module which
offers Python file semantics for nodes in an HDF5 file.  You can also
keep nodes transparently compressed, or you may repack the whole HDF5
file to defragment it or (de)compress its nodes, which may make a
reasonable option to a compressed archive.

I will be pleased to give more information.  Hope that helps.

.. _PyTables: http://www.pytables.org/
.. _HDF5: http://hdf.ncsa.uiuc.edu/HDF5/
.. _FileNode: http://pytables.sourceforge.net/html-doc/usersguide6.html

import disclaimer

::

	Ivan Vilata i Balaguer   >qo<   http://www.carabos.com/
	       C?rabos Coop. V.  V  V   Enjoy Data
	                          ""

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From timr at probo.com  Mon Feb 27 01:25:28 2006
From: timr at probo.com (Tim Roberts)
Date: Mon, 27 Feb 2006 06:25:28 GMT
Subject: SyntaxError: can't assign to a function call
References: <1140997057.610226.101220@u72g2000cwu.googlegroups.com>
	<1hbdijm.3cc1cz15xqd64N%aleaxit@yahoo.com>
	<1140998338.081756.313040@j33g2000cwa.googlegroups.com>
Message-ID: <on65021qdcolmvuj0ammt58k35ok14qq46@4ax.com>

"Fuzzyman" <fuzzyman at gmail.com> wrote:

>
>Alex Martelli wrote:
>> Fuzzyman <fuzzyman at gmail.com> wrote:
>>
>> > What gives ?
>>    ...
>> > >>> a = []
>> > >>> def f():
>> >       return a
>>    ...
>> > >>> f() += [4]
>> > SyntaxError: can't assign to function call
>>
>> Exactly what the error message says: it's syntactically forbidden to
>> perform any assignment on a function-call.
>>
>> If you're keen on these semantics, use for example
>>
>> f().extend([4])
>>
>
>Cool, thanks. That's what I did, it's just not an error I'd seen
>before. Everywhere else Python evaluates the function call and then
>does it's stuff with the result.

One thing that can be helpful in situations like this is to remember that
+= in Python isn't quite as "special" as it is in C.  So,

  f() += [4]

is the same as

  f() = f() + [4]

and I think you can see why that is a problem.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From tmp1 at reifenberg.de  Fri Feb 10 06:14:12 2006
From: tmp1 at reifenberg.de (Nebur)
Date: 10 Feb 2006 03:14:12 -0800
Subject: AdaptionFailure: How to use Interfaces with PyProtocols ?
Message-ID: <1139570052.123053.286320@o13g2000cwo.googlegroups.com>

Hi,
I tried to understand the docs of Peak's PyProtocols, and failed.
I use PyProtocols v0.93 final. I fetched the ...tar.gz file for Linux
and installed it using the setup.py.
Here's my Hello-World-like example, that defines a Duck, which
"implements" the given Interface:


 from protocols import Interface,adapt,advise

 class Quackable(Interface):
	 def quack(loudness):
		 """ print how loud to quack """
 class Duck:
	 advise(instancesProvide=[Quackable,])
	 def quack(self, loudness):
		 print "quack! %s loud"%(loudness)

 if __name__ == "__main__":
	 d = adapt(Duck, Quackable) # this line raises the failure
	 d.quack(3)

************ But it does not work that way. It get this
"AdaptionFailure" :

  File "...interfaces.py", line 14, in ?
    d = adapt(Duck, Quackable)
  File "C:\cygwin\home\pje\PyProtocols\src/protocols/_speedups.pyx",
line 199, in _speedups.adapt
  File "C:\cygwin\home\pje\PyProtocols\src/protocols/_speedups.pyx",
line 188, in _speedups._adapt
protocols.adapters.AdaptationFailure: ("Can't adapt", <class
__main__.Duck at 0xb7bcc47c>, <class '__main__.Quackable'>)

***************

Or is my Duck code wrong ?  Anybody knowing how to use an Interface ?
Thank you very much-
 Nebur

Remark:There seems to be some windows stuff in PyProtocols ("C:\...") -
a bug ? (I re-installed PyProtocols with option --without-speedups but
nothing changed.)



From grante at visi.com  Wed Feb 15 12:52:43 2006
From: grante at visi.com (Grant Edwards)
Date: Wed, 15 Feb 2006 17:52:43 -0000
Subject: Best way of finding terminal width/height?
References: <96nFf.43896$d5.199922@newsb.telia.net>
	<11uc3dohfitotc5@corp.supernews.com>
	<jysFf.155352$dP1.513537@newsc.telia.net>
	<11udc0r2bq11042@corp.supernews.com> <43E719EE.3040401@gmail.com>
	<11ueq4nhn91qm91@corp.supernews.com> <43E8659D.6010101@gmail.com>
	<11uhcjj2p10mm0d@corp.supernews.com> <43E8D4DD.7040904@gmail.com>
	<11uhodjciifej02@corp.supernews.com>
	<dscfcv$t5i$1@news.lysator.liu.se>
	<11uk67a4ao5efe6@corp.supernews.com>
	<dset15$hfq$1@news.lysator.liu.se>
	<11umnq61kf9m5f3@corp.supernews.com>
	<dsvd93$8g2$1@news.lysator.liu.se>
	<11v6kokrmpgfecc@corp.supernews.com>
	<43f35c94$1_3@newspeer2.tds.net>
Message-ID: <11v6qjbmhuvg0d4@corp.supernews.com>

On 2006-02-15, Kent Johnson <kent at kentsjohnson.com> wrote:
> Grant Edwards wrote:
>> I've got no complaints about the way things work, I was just
>> going to suggest changing the documentation to correctly
>> describe the way things work. Too mundane a solution?
>
> Submit a patch, it's quick and easy and fun:
> http://docs.python.org/about.html

Done.

-- 
Grant Edwards                   grante             Yow!  We just joined the
                                  at               civil hair patrol!
                               visi.com            


From news at lolmc.com  Mon Feb 20 14:59:43 2006
From: news at lolmc.com (bolly)
Date: 20 Feb 2006 11:59:43 -0800
Subject: converting sqlite return values
Message-ID: <1140465583.398495.63470@g44g2000cwa.googlegroups.com>

Hi,
I've been putting Python data into a sqlite3 database as tuples but
when I retrieve them they come back as unicode data e.g
'u(1,2,3,4)'.How can I change it back to a tuple so I can use it as a
Python native datatype?
I have looked in the docs and seen there is a decode/encode method but
how do I do this?
Hope you can help.



From grig.gheorghiu at gmail.com  Mon Feb  6 17:11:22 2006
From: grig.gheorghiu at gmail.com (Grig Gheorghiu)
Date: 6 Feb 2006 14:11:22 -0800
Subject: Best way to capture output of another command-line program in
	Win32?
In-Reply-To: <qu7fu19vuoddfcn2fu3t23mfqg6536t6qn@4ax.com>
References: <qu7fu19vuoddfcn2fu3t23mfqg6536t6qn@4ax.com>
Message-ID: <1139263882.684516.169070@o13g2000cwo.googlegroups.com>

subprocess gets my vote too.

You can do something like:

from subprocess import call, Popen, PIPE, STDOUT

def run_cmd(cmd):
....arglist = cmd.split()
....p = Popen(arglist, stdout=PIPE, stderr=STDOUT)
....output = p.communicate()[0]
....return (p.returncode, output)

rc, output = run_cmd("python setup.py test")
if rc:
....print "Command failed"
....sys.exit(rc)

Grig



From jeff at schwabcenter.com  Thu Feb 23 19:29:01 2006
From: jeff at schwabcenter.com (Jeffrey Schwab)
Date: Fri, 24 Feb 2006 00:29:01 GMT
Subject: spaces at ends of filenames or directory names on Win32
In-Reply-To: <U5adnSstztOb12PenZ2dnUVZ_sOdnZ2d@comcast.com>
References: <dtkuav$keb$1@solaris.cc.vt.edu> <43FE1B5E.8060009@websafe.com>
	<pan.2006.02.23.22.22.17.122779@REMOVETHIScyber.com.au>
	<U5adnSstztOb12PenZ2dnUVZ_sOdnZ2d@comcast.com>
Message-ID: <hrsLf.21068$915.9031@southeast.rr.com>

Larry Bates wrote:

> IMHO leading and/or trailing spaces in filenames is asking for
> incompatibilities with cross-platform file access.

With what platforms specifically?

> Much like
> using single-quote in filenames which are perfectly legal in
> DOS/Windows, but Linux doesn't like much.

Uh...  What Linux are you using?  And what FS?

$ touch "'" && ls
'
$ rm "'"
$


From aleaxit at yahoo.com  Mon Feb 27 22:09:11 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 27 Feb 2006 19:09:11 -0800
Subject: Use of __slots__
References: <dtt8ga$7b2$1@sea.gmane.org> <dtt9o8$ams$1@sea.gmane.org>
	<mailman.2475.1141051433.27775.python-list@python.org>
	<1hbepsi.1ms8ll98un954N%aleaxit@yahoo.com>
	<1141070817.692692.5100@i39g2000cwa.googlegroups.com>
Message-ID: <1hbfm0a.1i2aajl1vttr1oN%aleaxit@yahoo.com>

MrJean1 <MrJean1 at gmail.com> wrote:

> An example of the RARE use case may be this particular one
> 
>   <http://mail.python.org/pipermail/python-list/2004-May/220513.html>

A benchmark is not a use case.


Alex


From steve at REMOVETHIScyber.com.au  Mon Feb 20 17:18:34 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Tue, 21 Feb 2006 09:18:34 +1100
Subject: share function argument between subsequent calls but not between
	class instances!
References: <11vejkega5tbrc5@corp.supernews.com>
	<Xns976EAB5E52818duncanbooth@127.0.0.1>
	<87wtfsb9jc.fsf@rose.polar.local>
	<Xns976F9371C4C90duncanbooth@127.0.0.1>
Message-ID: <pan.2006.02.20.22.18.28.931866@REMOVETHIScyber.com.au>

On Mon, 20 Feb 2006 08:52:09 +0000, Duncan Booth wrote:

> Ben Finney wrote:
> 
>> Duncan Booth <duncan.booth at invalid.invalid> writes:
>>> If you intend to only use the default some of the time, and at other
>>> times pass in a different list, then save the 'default' in the
>>> instance and use a special marker value to indicate when you intend
>>> the default to be used:
>> 
>> The most common idiom for such a marker is the None value.
>> 
> 
> Can you provide any firm evidence that using None is more common?


Yes, I wrote a quick and dirty script to roughly count the default
values in the Python 2.3 standard library. Here are my results:

$ python default_counter.py
185 .py source files were opened.
4437 function or method definitions were found.
These functions included at least 1228 arguments with default values.
529 or 4.307818e+01% used None as the default value.

So, roughly 40% of default values in the standard library are None. If I
cared enough (I don't) I would re-write the counter to analyse all the
default values. But by eye-balling the function lines, the impression I
get is that the remaining 60% of default values are divided unequally
between dozens of different defaults. Some random examples:

"rb", "", "Prompt: ", -1, 0, 1, 3, sys.maxint, (), [].

My gut-feeling would be, 40-odd percent None, 40-odd percent for small
ints (-1, 0, 1, ..?), the remainder split between everything else.

If anyone cares to look at my quick and dirty source code, it is attached
following my signature.


-- 
Steven.




* * * 

"""Rough and ready script to analyse the Python standard library 
and count function definitions that use None as a default argument.
"""

from __future__ import division
import os

location = "/usr/lib/python2.3/"

file_count = 0  # number of files successfully opened
func_count = 0  # number of function definitions
default_count = 0  # number of functions with a default value
none_count = 0  # number of functions with None as a default value

for name in os.listdir(location):
    if name.endswith(".py") and os.path.isfile(location+name):
        try:
            fp = file(location+name, "r")
        except IOError:
            continue
        file_count += 1
        lines = fp.readlines()
        fp.close()
        for line in lines:
            line = line.strip()
            if line.startswith("#"):
                continue
            elif line.startswith("def "):
                func_count += 1
                default_count += line.count("=")
                none_count += line.count("None")
                # if line.count("="): print line

# Report results found:

print "%d .py source files were opened." % file_count
print "%d function or method definitions were found." % func_count
print "These functions included at least %d arguments with default values." % default_count
print "%d or %e%% used None as the default value." % \
(none_count, none_count/default_count*100)




From mark at holmes.nl  Fri Feb 17 01:37:00 2006
From: mark at holmes.nl (wscrsurfdude)
Date: 16 Feb 2006 22:37:00 -0800
Subject: file.read problem
Message-ID: <1140158220.388409.87650@g47g2000cwa.googlegroups.com>

f = open('myfile,'r')
a = f.read(5000)

When I do this I get the first 634 bytes. I tried using the:
f = open('myfile,'rb')
option, but now there are a few 0x0D bytes extra in myfile. 0x0D =
Carriage return. How can I make a program that not puts in the 0x0D
bytes in windows.

In linux the first 2 lines are working perfectly.



From kermit at polaris.net  Fri Feb 10 17:50:21 2006
From: kermit at polaris.net (Kermit Rose)
Date: Fri, 10 Feb 2006 17:50:21 -0500 (Eastern Standard Time)
Subject: arrays in python
Message-ID: <43ED18AD.000007.03164@YOUR-4105E587B6>

From: Kermit Rose
Date: 02/10/06 17:36:34
To: python-help at python.org
Subject: Arrays
 
  
Hello.
 
I want to write a program in python using integer arrays.
 
I wish to calculate formulas using 200 digit integers.
 
I could not find any documentation in python manual about declaring arrays.
 
I searched the internet
 
and found an example that said I must declare
 
from Numeric import *
 
 
and I downloaded a numerical python  extension,
 
but still  have not found a way to declare an array of given length.
 
The zeros function always gives me an error message.
 
 
Kermit       <    kermit at polaris.net >
 
 
 
 



From cygnus at cprogrammer.org  Sun Feb 19 15:50:41 2006
From: cygnus at cprogrammer.org (Jonathan Daugherty)
Date: Sun, 19 Feb 2006 12:50:41 -0800
Subject: editor for Python on Linux
In-Reply-To: <dtai6e$23m$2@ariane.blic.net>
References: <dtai6e$23m$2@ariane.blic.net>
Message-ID: <20060219205041.GH7453@vulcan.cprogrammer.org>

# I wonder which editor or IDE you can recommend me for writing Python
# programs. I tried with jEdit but it isn't perfect.

It depends on what you need; what don't you like about JEdit?  What do
you think a good editor or IDE should provide?

-- 
  Jonathan Daugherty
  http://www.parsed.org


From gregpinero at gmail.com  Tue Feb 14 16:25:07 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Tue, 14 Feb 2006 16:25:07 -0500
Subject: How can I find a freelance programmer?
In-Reply-To: <op.s4zgn4x5ix6gqv@charles>
References: <op.s4y9v9olix6gqv@charles>
	<mailman.1918.1139950011.27775.python-list@python.org>
	<op.s4zgn4x5ix6gqv@charles>
Message-ID: <312cfe2b0602141325y171e9303g3b787997c2e730eb@mail.gmail.com>

That's not Steve Holden.  Steve Holden is a folk hero around here, in
fact when the Boogeyman goes to sleep every night, he checks his
closet for Steve Holden.

...

sorry, just want an excuse to use a Chuck Norris fact ;-)
http://www.chucknorrisfacts.com/

-Greg


On 2/14/06, Charles <me at privacy.net> wrote:
> On Tue, 14 Feb 2006 17:46:46 -0300, Tim Parkin <tim at pollenation.net> wrote:
>
> > You could ask Steve Holden?  -  that'll be 10% commission Steve! ;-)
>
> Him: http://sholden.typepad.com/ ?
>
>
> --
> Charles.
>
> Desenvolvimento e cria??o de sites: www.auriance.com
> Hospedagem de sites e servidores dedicados: www.auriance.net
> --
> http://mail.python.org/mailman/listinfo/python-list
>


--
Gregory Pi?ero
Chief Innovation Officer
Blended Technologies
(www.blendedtechnologies.com)


From steve at REMOVETHIScyber.com.au  Thu Feb 23 17:22:17 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 24 Feb 2006 09:22:17 +1100
Subject: spaces at ends of filenames or directory names on Win32
References: <dtkuav$keb$1@solaris.cc.vt.edu> <43FE1B5E.8060009@websafe.com>
Message-ID: <pan.2006.02.23.22.22.17.122779@REMOVETHIScyber.com.au>

On Thu, 23 Feb 2006 14:30:22 -0600, Larry Bates wrote:

> How about not naming files with leading and trailing spaces on
> the Mac?  Seems like a bad habit that needs breaking ;-).

Why is it a bad habit? Because *Windows* is primitive enough that it can't
cope with leading and trailing spaces? I don't see why Windows' lack is
Mac users' problem.


-- 
Steven.



From limodou at gmail.com  Tue Feb  7 22:30:58 2006
From: limodou at gmail.com (limodou)
Date: Wed, 8 Feb 2006 11:30:58 +0800
Subject: module with __call__ defined is not callable?
In-Reply-To: <6ab99bf50602071924g10f44d2bk@mail.gmail.com>
References: <2773CAC687FD5F4689F526998C7E4E5F4DB920@au3010avexu1.global.avaya.com>
	<6ab99bf50602071924g10f44d2bk@mail.gmail.com>
Message-ID: <505f13c0602071930x7c028d7do2a0df58eb24fae10@mail.gmail.com>

On 2/8/06, adam johnson <adam.sven.johnson at gmail.com> wrote:
> Thanks for you answer.
>
> I was under the impression that you could tack methods onto an object at any
> time, your example almost works with old style classes and would with a
> function instead of a method.
>
> >>> class A:
> ...     def __init__(self):
> ...             self.__call__ = A.hello
> ...     def hello(self):
> ...             print "Hello, world!"
> ...
> >>> a = A()
> >>> a()
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> TypeError: unbound method hello() must be called with A instance as first
> argument (got nothing instead)
> >>> a(a)
> Hello, world!
> >>>
>
> So now all I need to know is why now with new style classes the special
> functions need to be defined on the class instead of attached to the
> instance at any time.
>
don't need do like above!

 >>> class A:
 ...     def __init__(self):
 ...             A.__call__ = A.hello
 ...     def hello(self):
 ...             print "Hello, world!"

 >>> a = A()
 >>> a()
 Hello, world!

You should review the bound method and unbound method.

--
I like python!
My Blog: http://www.donews.net/limodou
NewEdit Maillist: http://groups.google.com/group/NewEdit


From pslana at atronic.com  Wed Feb 15 02:45:19 2006
From: pslana at atronic.com (pierre_py)
Date: 14 Feb 2006 23:45:19 -0800
Subject: Excel and TrackChanges
Message-ID: <1139989519.840588.90820@z14g2000cwz.googlegroups.com>

I have a problem with pycom automation with excel.
If i use the following in my excel_wrapper:
"""
self.Workbook.Save()
self.Workbook.HighlightChangesOptions(When=1)
self.Workbook.ListChangesOnNewSheet = True
"""
I don't get any history worksheet. If i use 2 (xlAllChanges) or 3
(xlNotYetReviewed), i get the history worksheet but with all results.

I use Office 2k sp1.

thanks in advance



From bignose+hates-spam at benfinney.id.au  Tue Feb 28 20:37:26 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 01 Mar 2006 12:37:26 +1100
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
Message-ID: <87mzgb2be1.fsf@rose.polar.local>

Ben Finney <bignose+python at benfinney.id.au> writes:
> PEP:            354
> Title:          Enumerations in Python
> Version:        $Revision: 42186 $
> Last-Modified:  $Date: 2006-01-26 11:55:20 +1100 (Thu, 26 Jan 2006) $

Most people seem to be unopposed or in favour of some kind of
enumeration mechanism making it at least as far as the standard
library.

As I understand it, the current outstanding debates are::

  * Builtin types versus stdlib module (maybe 'collections')

  * Ordered sequences versus unordered iterables

  * Immutable versus mutable

  * Bad comparisons: raise exception versus return NotImplemented

  * Terminology for each of these concepts

Any new issues before I make a revised draft?

-- 
 \       "It is seldom that liberty of any kind is lost all at once."  |
  `\                                                     -- David Hume |
_o__)                                                                  |
Ben Finney


From eric at qwhd746oihd49.net  Mon Feb  6 09:28:27 2006
From: eric at qwhd746oihd49.net (Matt Helm)
Date: Mon, 06 Feb 2006 08:28:27 -0600
Subject: win32com, BSTR, and null terminated strings
References: <mzh5xzyr.fsf@qwhd746oihd49.net>
	<mailman.1465.1139200439.27775.python-list@python.org>
Message-ID: <zml4imt0.fsf@qwhd746oihd49.net>


> It's perfectly good Python, though, so just forget about it or wrap it
> in a "cstring(s)" function do you don't have to look at it!

Thanks for the sanity check. I just wanted to make sure I was correct
as well as right.

Matt



From johnjsal at NOSPAMgmail.com  Thu Feb 16 15:53:58 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 16 Feb 2006 20:53:58 GMT
Subject: embedding python in HTML
Message-ID: <GD5Jf.1637$No6.38292@news.tufts.edu>

I'm hoping someone can give me the basics for how to do very simple 
things with Python scripts from within my HTML. For example, I know that 
I can do this in PHP:

<h1>Here is a header</h1>
<?php include("file.html"); ?>    // include some external html
<p>More html</p>

So to do this with Python, do I simply integrate it into the HTML as 
above, with no extra steps? Also, which symbols do I use to denote 
Python language?

Thanks.


From allan_horbach at hotmail.com  Mon Feb 27 05:31:42 2006
From: allan_horbach at hotmail.com (Allan)
Date: 27 Feb 2006 02:31:42 -0800
Subject: how do I factor a number down to one digit?
Message-ID: <1141036302.641818.72570@i39g2000cwa.googlegroups.com>

I'm trying to write a numerology program where I have each letter
identified by a numerical value like
a=1
b=2
c=3
as so forth. I then input a name. How do I treat each letter as a
single value? That is, instead of print myname I have to do a print
m+y+n+a+m+e which returns a number. I next want to convert the
resulting two or three digit number to a single digit. Like 123 would
be 1+2+3 returning a 5. I hope this isn't too stupid of a question.



From http  Thu Feb 23 20:07:06 2006
From: http (Paul Rubin)
Date: 23 Feb 2006 17:07:06 -0800
Subject: A C-like if statement
References: <hp-dnY20cusOnGPeRVn-rg@nmt.edu>
Message-ID: <7x8xs1zhs5.fsf@ruckus.brouhaha.com>

"Bob Greschke" <bob at passcal.nmt.edu> writes:
> I miss being able to do something like this in Python
> 
> 1f (I = a.find("3")) != -1:
>     print "It's here: ", I
> else:
>     print "No 3's here"
> 
> where I gets assigned the index returned by find() AND the if statement gets 
> to do its job in the same line.  Then you don't have to have another like 
> that specifically gets the index of the "3".  Is there a way to do this in 
> Python?

For regexps I sometimes do it with a specially created class instance.
Something like:
  
  save = Cache_match()

  if save.find(a, "3"):
    print "it's here:", save.result
  else:
    print "no 3's here"

Implementing Cache_match is left to you as an exercise.  It does make
your code a bit cleaner if you're doing lots of matching.


From python-url at phaseit.net  Mon Feb 13 11:08:02 2006
From: python-url at phaseit.net (Cameron Laird)
Date: Mon, 13 Feb 2006 16:08:02 GMT
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Feb 13)
Message-ID: <dsq8p6$8a5$1@lairds.us>

QOTW:  "Dangit!  I need to find a less honest programming language.  Anyone
have a Perl cookbook handy? ..." - Lonnie Princehouse

"The pursuit of orthogonality, while admirable, can lead to insanity if
pushed too far." - Steve Holden


    One of this week's half-dozen examples of the, "Is there a better
    way ...?  We've now improved it by a factor of 300", pattern has
    to do with combinatorics--specifically, the combinations of n
    items from a list of m:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/1f7e62e5ab0edb90/
        
    Is it possible to test a string for non-ASCII characters?  No,
    it's more than possible; viewed in the correct perspective, it's
    *easy*, and merely an application of Python's more general
    encoding capabilities:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/9011319757576f45/
        
    The next PyPy sprint will immediately follow PyCon 2006:
        http://us.pycon.org/TX2006/Sprinting

    JavaScript practitioners will find Python eases their transition
    to the server- and native-sides:
        http://htmatters.net/htm/1/2006/02/Why-Python-makes-sense-for-web-development.cfm

    Paul McGuire reports satisfaction on his first use of an HTML-oriented
    extension to unittest:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/369e0f8c7e4efef/

    Pyvm is (yet) another Python implementation, one based on an independent
    virtual machine.  It has now its own Wiki:
        http://pyvm.pbwiki.com/


========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Steve Bethard, Tim Lesher, and Tony Meyer continue the marvelous
    tradition early borne by Andrew Kuchling, Michael Hudson and Brett
    Cannon of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and
sponsor the "Python-URL!" project.


From luis.armendariz at gmail.com  Wed Feb 22 18:12:18 2006
From: luis.armendariz at gmail.com (Ludwig)
Date: 22 Feb 2006 15:12:18 -0800
Subject: Attached images by plain email.
References: <1140037314.129890.135970@o13g2000cwo.googlegroups.com>
	<1140043677.756437.315080@g14g2000cwa.googlegroups.com>
	<1140047591.131312.242680@g44g2000cwa.googlegroups.com>
	<1140467256.733280.207240@z14g2000cwz.googlegroups.com>
Message-ID: <1140649938.431901.209050@g14g2000cwa.googlegroups.com>

Seems like you are not providing a full path to the file 'check.jpg'.
How is your program supposed to know where in the filesystem it
is located? Either that, or you have to put the file in the same
directory that on which the program is running.

Also, you should use two backslashes in the name: part

   body = part.startbody('image/jpeg; name=c:\\check.jpg')

This is because \ is the escape character in strings. If you
mean a literal backslash, it has to escape itself. Hence,
you use \\

Hope that helps!
-Luis



From mitsura at skynet.be  Tue Feb  7 05:55:38 2006
From: mitsura at skynet.be (mitsura at skynet.be)
Date: 7 Feb 2006 02:55:38 -0800
Subject: how to copy a Python object
In-Reply-To: <1139308149.557027.77160@z14g2000cwz.googlegroups.com>
References: <1139301392.205225.48690@o13g2000cwo.googlegroups.com>
	<1139308149.557027.77160@z14g2000cwz.googlegroups.com>
Message-ID: <1139309738.750080.183090@g47g2000cwa.googlegroups.com>

Already thanks for the reply,

but how to write your own copy operator? Won't you always be passing
referrences to new_obj?



From gene.tani at gmail.com  Wed Feb 22 09:45:39 2006
From: gene.tani at gmail.com (gene tani)
Date: 22 Feb 2006 06:45:39 -0800
Subject: That's really high-level: bits of beautiful python
In-Reply-To: <qe_Kf.17237$915.1356@southeast.rr.com>
References: <ZpSdnRUPhtMP-WbenZ2dnUVZ_sSdnZ2d@is.co.za>
	<qe_Kf.17237$915.1356@southeast.rr.com>
Message-ID: <1140619539.077223.34620@g44g2000cwa.googlegroups.com>


Jeffrey Schwab wrote:
> Max wrote:
> > I was just thinking perhaps we should create some kind of collection of
> > bits of "impressive" code like this.
>
> Do you mean something like the ASPN Cookbooks?
>
> 	http://aspn.activestate.com/ASPN/Cookbook/
>

repositories, indexes and search engines for py code (pardon the small
number ;-}

http://www.vex.net/parnassus/
http://directory.google.com/Top/Computers/Programming/Languages/Python/Modules/

http://cheeseshop.python.org/

http://dmoz.org/Computers/Programming/Languages/Python/Modules/

http://aspn.activestate.com/ASPN/Cookbook/Python
http://python.codezoo.com/
http://sourceforge.net/softwaremap/trove_list.php?form_cat=178&xdiscrim=178

http://www.bigbold.com/snippets/

http://www.voidspace.org.uk/cgi-bin/pysearch/search.py
http://koders.com/
http://krugle.com/
http://www.codefetch.com/



From scott.daniels at acm.org  Thu Feb  9 09:02:01 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Thu, 09 Feb 2006 06:02:01 -0800
Subject: Unable to get PIL to load jpeg images
In-Reply-To: <1139475569.693965.249700@o13g2000cwo.googlegroups.com>
References: <1139263113.552140.114100@o13g2000cwo.googlegroups.com>
	<1139315319.654694.285330@g43g2000cwa.googlegroups.com>
	<mailman.1545.1139316436.27775.python-list@python.org>
	<1139475569.693965.249700@o13g2000cwo.googlegroups.com>
Message-ID: <43eb4a1e$1@nntp0.pdx.net>

peter.mosley at talk21.com wrote:
> ....  The problem was that I didn't have the right jpeg library installed
> (although what I had was enough to show jpegs in gThumb, GIMP and the
> Gnome and KDE desktops so I don't understand why it wasn't). I had to
> also install a jpeg development library, which fortunately was
> available on my Fedora Core 3 installation disc....

The problem is in the name chosen by _lots_ of distributions.  A "jpeg
developer library" or any other of the "development libraries" are not
just for those who intend to "develop" jpeg, but really for those who
"develop programs" -- that is run compilers and linkers.  If you need
to compile and link a program that uses one of these libraries, you need
the "developer library."  Even if the only sense in which you are a
developer is that you are rebuilding Fredrik's code.

--Scott David Daniels
scott.daniels at acm.org


From bradfordh at gmail.com  Tue Feb  7 11:33:28 2006
From: bradfordh at gmail.com (Tempo)
Date: 7 Feb 2006 08:33:28 -0800
Subject: Is Python good for web crawlers?
Message-ID: <1139330008.270988.227170@g44g2000cwa.googlegroups.com>

I was wondering if python is a good language to build a web crawler
with? For example, to construct a program that will routinely search x
amount of sites to check the availability of a product. Or to search
for news articles containing the word 'XYZ'. These are just random
ideas to try to explain my question a bit further. Well if you have an
opinion about this please let me know becasue I am very interested to
hear what you have to say. Thanks.



From grahn+nntp at snipabacken.dyndns.org  Sat Feb 11 14:23:39 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 11 Feb 2006 19:23:39 GMT
Subject: Determining an operating system's default browser
References: <mailman.1690.1139528346.27775.python-list@python.org>
	<43EBD5E1.1040501@websafe.com>
	<mailman.1692.1139530731.27775.python-list@python.org>
	<1139572261.172035.194190@g14g2000cwa.googlegroups.com>
Message-ID: <slrndusd7l.2t1.grahn+nntp@frailea.sa.invalid>

On 10 Feb 2006 03:51:01 -0800, Paul Boddie <paul at boddie.org.uk> wrote:
> John McMonagle wrote:
>> On Thu, 2006-02-09 at 17:53 -0600, Larry Bates wrote:
>> > You don't have to determine it.  Just os.startfile('page1.html')
>> > and let the OS figure it out.
>>
>> Works great for Windows - not available on Unix though.
>
> Take a look at the desktop module for similar functionality for KDE,
> GNOME and the Mac OS X desktop environment (as well as Windows, of
> course):

Note that those do not, of course, work on all Unices.

On my machines, there is One Correct Way of doing these things, and that's
to look in the MIME support/configuration files (~/.mailcap, and so on),
first for the user, then system-wide. Something there might tell you what
program should handle text/html content.

This mechanism is widespread under Unix, I think ... but I don't know if
there is a general interface to it, or a Python interface.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From bblais at bryant.edu  Tue Feb 21 07:24:01 2006
From: bblais at bryant.edu (Brian Blais)
Date: Tue, 21 Feb 2006 07:24:01 -0500
Subject: algorithm, optimization, or other problem?
Message-ID: <43FB0661.1040202@bryant.edu>

Hello,

I am trying to translate some Matlab/mex code to Python, for doing neural 
simulations.  This application is definitely computing-time limited, and I need to 
optimize at least one inner loop of the code, or perhaps even rethink the algorithm. 
   The procedure is very simple, after initializing any variables:

1) select a random input vector, which I will call "x".  right now I have it as an 
array, and I choose columns from that array randomly.  in other cases, I may need to 
take an image, select a patch, and then make that a column vector.

2) calculate an output value, which is the dot product of the "x" and a weight 
vector, "w", so

	y=dot(x,w)

3) modify the weight vector based on a matrix equation, like:

	w=w+ eta * (y*x - y**2*w)
               ^
               |
               +---- learning rate constant

4) repeat steps 1-3 many times

I've organized it like:

for e in 100:   # outer loop
     for i in 1000:  # inner loop
         (steps 1-3)

     display things.

so that the bulk of the computation is in the inner loop, and is amenable to 
converting to a faster language.  This is my issue:

straight python, in the example posted below for 250000 inner-loop steps, takes 20 
seconds for each outer-loop step.  I tried Pyrex, which should work very fast on such 
a problem, takes about 8.5 seconds per outer-loop step.  The same code as a C-mex 
file in matlab takes 1.5 seconds per outer-loop step.

Given the huge difference between the Pyrex and the Mex, I feel that there is 
something I am doing wrong, because the C-code for both should run comparably. 
Perhaps the approach is wrong?  I'm willing to take any suggestions!  I don't mind 
coding some in C, but the Python API seemed a bit challenging to me.

One note: I am using the Numeric package, not numpy, only because I want to be able 
to use the Enthought version for Windows.  I develop on Linux, and haven't had a 
chance to see if I can compile numpy using the Enthought Python for Windows.

If there is anything else anyone needs to know, I'll post it.  I put the main script, 
and a dohebb.pyx code below.


			thanks!

					Brian Blais

-- 
-----------------

             bblais at bryant.edu
             http://web.bryant.edu/~bblais




# Main script:

from dohebb import *
import pylab as p
from Numeric import *
from RandomArray import *
import time

x=random((100,1000))    # 1000 input vectors

numpats=x.shape[0]
w=random((numpats,1));

th=random((1,1))

params={}
params['eta']=0.001;
params['tau']=100.0;
old_mx=0;
for e in range(100):

     rnd=randint(0,numpats,250000)
     t1=time.time()
     if 0:  # straight python
         for i in range(len(rnd)):
             pat=rnd[i]
             xx=reshape(x[:,pat],(1,-1))
             y=matrixmultiply(xx,w)
             w=w+params['eta']*(y*transpose(xx)-y**2*w);
             th=th+(1.0/params['tau'])*(y**2-th);
     else: # pyrex
         dohebb(params,w,th,x,rnd)
     print time.time()-t1


p.plot(w,'o-')
p.xlabel('weights')
p.show()


#=============================================

#         dohebb.pyx

cdef extern from "Numeric/arrayobject.h":

   struct PyArray_Descr:
     int type_num, elsize
     char type

   ctypedef class Numeric.ArrayType [object PyArrayObject]:
     cdef char *data
     cdef int nd
     cdef int *dimensions, *strides
     cdef object base
     cdef PyArray_Descr *descr
     cdef int flags


def dohebb(params,ArrayType w,ArrayType th,ArrayType X,ArrayType rnd):


     cdef int num_iterations
     cdef int num_inputs
     cdef int offset
     cdef double *wp,*xp,*thp
     cdef int *rndp
     cdef double eta,tau

     eta=params['eta']  # learning rate
     tau=params['tau']  # used for variance estimate

     cdef double y
     num_iterations=rnd.dimensions[0]
     num_inputs=w.dimensions[0]

     # get the pointers
     wp=<double *>w.data
     xp=<double *>X.data
     rndp=<int *>rnd.data
     thp=<double *>th.data

     for it from 0 <= it < num_iterations:

         offset=rndp[it]*num_inputs

         # calculate the output
         y=0.0
         for i from 0 <= i < num_inputs:
             y=y+wp[i]*xp[i+offset]

         # change in the weights
         for i from 0 <= i < num_inputs:
             wp[i]=wp[i]+eta*(y*xp[i+offset] - y*y*wp[i])

         # estimate the variance
         thp[0]=thp[0]+(1.0/tau)*(y**2-thp[0])







From lycka at carmen.se  Fri Feb 24 04:27:03 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 24 Feb 2006 10:27:03 +0100
Subject: datetime iso8601 string input
In-Reply-To: <1140714826.044272.253460@t39g2000cwt.googlegroups.com>
References: <1140714826.044272.253460@t39g2000cwt.googlegroups.com>
Message-ID: <dtmjh7$97t$1@wake.carmen.se>

Rubic wrote:
> I can understand why datetime can't handle
> arbitrary string inputs, but why not just
> simple iso8601 format -- i.e. the default
> output format for datetime?

Have you actually read the ISO 8601 standard?
If you have, you would know that parsing valid
ISO 8601 is fairly close to handling arbitrary
strings...

I suspect this absence is quite deliberate.

There are so many possible string formats that
are used and prefered in different situations,
and various loop holes with time zones and DST
etc, that it's probably better to let the
programmer take full responsibility over this
instead of providing a 10% solution.

ater all, it isn't very hard to use for instance
time.strptime() with some appropriate format,
and build datetime objects from that. Then
the programmer is in control.


From aleaxit at yahoo.com  Sat Feb 11 13:18:14 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sat, 11 Feb 2006 10:18:14 -0800
Subject: PySizeof: almost useful
References: <mailman.1731.1139620446.27775.python-list@python.org>
Message-ID: <1halb2j.1me3cd212hxhegN%aleaxit@yahoo.com>

Ian Leitch <port001 at gentoo.org> wrote:
   ...
> 2. I'm at a loss as how to calculate the size of a long object -- any tips?

#include "longintrepr.h" (from the Python sources).  Then, given a
PyLongObject *l, abs(l->ob_size) is the number of "digits", each taking
SHIFT bits.

> Many thanks to anyone bored enough to review this code.

Sorry, I don't have the time, but I hope the above tip can be useful.


Alex


From dementrio at gmail.com  Wed Feb 15 12:37:48 2006
From: dementrio at gmail.com (dementrio)
Date: 15 Feb 2006 09:37:48 -0800
Subject: low level data types
In-Reply-To: <45h35aF6mmrbU1@uni-berlin.de>
References: <1140005257.773955.32860@g14g2000cwa.googlegroups.com>
	<mailman.1951.1140015161.27775.python-list@python.org>
	<1140020594.762674.162840@g47g2000cwa.googlegroups.com>
	<45h35aF6mmrbU1@uni-berlin.de>
Message-ID: <1140025068.711770.60970@g14g2000cwa.googlegroups.com>

> Have you actually _read_ the struct documentation?

Ok, sorry about that. Somehow I managed to notice only that "By
default, C numbers are represented in the machine's native format and
byte order".

Now I'm just going to RTFM and stay silent.



From fuzzyman at gmail.com  Thu Feb  2 08:38:39 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 2 Feb 2006 05:38:39 -0800
Subject: cgi - secure sessions
In-Reply-To: <1138887222.504350.209200@z14g2000cwz.googlegroups.com>
References: <1138842390.012855.107610@g44g2000cwa.googlegroups.com>
	<7x8xsuczxz.fsf@ruckus.brouhaha.com>
	<1138844380.094365.223840@g44g2000cwa.googlegroups.com>
	<1138871331.983318.58170@f14g2000cwb.googlegroups.com>
	<1138887222.504350.209200@z14g2000cwz.googlegroups.com>
Message-ID: <1138887519.941889.276930@g14g2000cwa.googlegroups.com>


GazaM wrote:
> Ok, thanks for all the help guys. It seems that running this type of
> script from inside of the html just isn't going to work as needed.
> Seems like I'll just have to ditch the .shtml and point directly to a
> cgi. This is how the other Python frameworks and sites work, such as
> reddit and plone etc right?

That's more normal. logintools has templates in a directory and outputs
pages based on those. That's what all the 'tempalting engine'
discussion going on at the moment is about.

On the other hand, you can have static html pages with forms that call
the CGI. The CGI will still have to return HTML though.

logintools itself uses an *ultra simple* templating system - just
replacing special values in the template with the dynamically generated
values. There is no logic in the tempaltes whatsoever.

All the best,


Fuzzyman
http://www.voidspace.org.uk/python/index.shtml



From steve at hastings.org  Thu Feb 23 12:52:45 2006
From: steve at hastings.org (Steve R. Hastings)
Date: Thu, 23 Feb 2006 09:52:45 -0800
Subject: PyAtom, a Python module for creating Atom syndication feeds
References: <pan.2006.02.23.08.53.39.65246@hastings.org>
	<87mzgicute.fsf@voodoo.myself>
	<pan.2006.02.23.09.27.32.582881@hastings.org>
	<87hd6qcsgl.fsf@voodoo.myself>
Message-ID: <pan.2006.02.23.17.52.44.595425@hastings.org>

> docstrings of method are messed up (why you begin them from the column 0?)

Well, it seemed like a good idea at the time.

I wanted all my docstrings to look nice in an 80-column terminal
emulator, and it's easy to format them to similar lengths when they all
start in the same column.  My standard is to use up to 72 columns for
line lengths.

When you have a class, which contains a function, which has a docstring,
the docstring is indented at least 3 levels.  If you then use 72 columns,
the strings will wrap in the source code.

All that said, if the community doesn't do it this way, I'll go ahead and
change it.  It seemed like a good way to go but I'm not combative about it.


>     Function Names
> 
>       Function names should be lowercase, with words separated by underscores
>       as necessary to improve readability.
> 
>       mixedCase is allowed only in contexts where that's already the
>       prevailing style (e.g. threading.py), to retain backwards compatibility.

Oh, right.  I do have some mixed-case function names; I guess I'd better
rename them right away.

By the way, I started PyAtom as a learning project.  Now that it's done I
want to share it, but I didn't study PEP 8 very much before I started it.

Thank you for the feedback.
-- 
Steve R. Hastings    "Vita est"
steve at hastings.org    http://www.blarg.net/~steveha



From claird at lairds.us  Sun Feb 12 11:08:02 2006
From: claird at lairds.us (Cameron Laird)
Date: Sun, 12 Feb 2006 16:08:02 GMT
Subject: Netstat in python. Does it's possible?
References: <s1mHf.5180$9G6.428@tornado.fastwebnet.it>
	<43EE0286.5020409@v.loewis.de>
	<slrndusfol.2t1.grahn+nntp@frailea.sa.invalid>
	<43EE7B7E.5050802@v.loewis.de>
Message-ID: <ee24c3-7sj.ln1@lairds.us>

In article <43EE7B7E.5050802 at v.loewis.de>,
Martin v. L?wis <martin at v.loewis.de> wrote:
>Jorgen Grahn wrote:
>> There might still be a problem for people doing things like this: netstat
>> might use unstable or non-public APIs to find the things it lists. This is
>> fine because it's typically your OS vendor who have to handle that (ship
>> another netstat when the /proc or /sys file system layout changes, etc).
>
>Right. However, on Unix, there aren't really that much "non-public"
>APIs. If you can figure out what the system call number is, and you
>have /usr/include/sys, you can typically come up with a way to call
>this API.
>
>It becomes tricky if netstat turns out to read /dev/kmem or some such.
>
>> If it works like that, you can access the APIs fine from Python -- but you
>> cannot write a portable 'pynetstat' without a lot of effort and maintenance.
>
>Well, to make that accessible from Python, you need to have Python
>wrappers for all system calls involved (or for library routines that
>use the system calls the right way). In case of /proc, this is easy;
>if it is a ioctl(2), it might still be doable. If it is something
>else, you may have to write a Python wrapper for that other system
>call first.
			.
			.
			.
ALSO, as you know, but billie might not, Python certainly makes
it easy enough to wrap netstat itself as an external executable.
In many situations, *that*'s the right solution.


From drobinow at gmail.com  Sat Feb 25 14:57:03 2006
From: drobinow at gmail.com (drobinow at gmail.com)
Date: 25 Feb 2006 11:57:03 -0800
Subject: spaces at ends of filenames or directory names on Win32
In-Reply-To: <dtkuav$keb$1@solaris.cc.vt.edu>
References: <dtkuav$keb$1@solaris.cc.vt.edu>
Message-ID: <1140897423.932377.304640@i39g2000cwa.googlegroups.com>

For example... tell windows to move a file named ' XXX ' (one space
before and one space after the filename). Windows will complain that
file 'XXX' does not exist. It's correct of course, 'XXX' does not
exist,
but ' XXX ' does indeed exist.

Can anyone rescue me from this madness :(
-----
 Please post your Python code.  I don't see the problem you're
describing.



From fuzzyman at gmail.com  Sun Feb 26 18:58:58 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 26 Feb 2006 15:58:58 -0800
Subject: SyntaxError: can't assign to a function call
In-Reply-To: <1hbdijm.3cc1cz15xqd64N%aleaxit@yahoo.com>
References: <1140997057.610226.101220@u72g2000cwu.googlegroups.com>
	<1hbdijm.3cc1cz15xqd64N%aleaxit@yahoo.com>
Message-ID: <1140998338.081756.313040@j33g2000cwa.googlegroups.com>


Alex Martelli wrote:
> Fuzzyman <fuzzyman at gmail.com> wrote:
>
> > What gives ?
>    ...
> > >>> a = []
> > >>> def f():
> >       return a
>    ...
> > >>> f() += [4]
> > SyntaxError: can't assign to function call
>
> Exactly what the error message says: it's syntactically forbidden to
> perform any assignment on a function-call.
>
> If you're keen on these semantics, use for example
>
> f().extend([4])
>

Cool, thanks. That's what I did, it's just not an error I'd seen
before. Everywhere else Python evaluates the function call and then
does it's stuff with the result.

All the best,

Fuzzyman

> which IS quite legal (or, if you know the RHS list has only one item,
> f().append(4) is clearer and more effective).
> 
> 
> Alex



From j.s.hallinan at ncl.ac.uk  Wed Feb 22 14:04:48 2006
From: j.s.hallinan at ncl.ac.uk (Jennifer Hallinan)
Date: Wed, 22 Feb 2006 19:04:48 +0000
Subject: Psychic bug
Message-ID: <8qcpv1hrcepsukouv371seacoe40u0lr43@4ax.com>

Hi,

I have a mutate function for a genetic algorithm which is giving me
odd results. I suspect I'm missing somthing really simple, so I'd be
grateful for any suggestions. Basically, when I comment out the line
which is commented out below, it works fine (although of course it
doesn't change the genome). When I uncomment it gen[letter]
automagically gets the value base in the print statements, before the
assignment has been made. And it still doesn't update the genome.
Genome is a string of integers in the range 0- 3, hence the
conversion.

    def Mutate(self, mrate):
        g = Random(rseed)
        # If no mutation rate specified, use 1 per genome
        if mrate == -1:
            mrate = 1.0/len(self.genome)
        print "mrate is ", mrate

        print "original genome: "
        print self.genome
        # convert genome to a list
        gen = [ord(letter)-48 for letter in self.genome]

        for letter in range(len(gen)):
            rnum = g.random()
            if rnum < mrate:
                base = g.randint(0,3)
                print "base is ", base
                print "pos ", letter, gen[letter], " to ", base
#                gen[letter] = base

        # convert list back to a string
        self.genome = ''.join([str(x) for x in gen])
        print "final genome"
        print self.genome


Output with line commented out:
base is  1
pos  40 0  to  1
base is  0
pos  185 2  to  0
base is  3
pos  223 0  to  3

...etc

Output with line included:
base is  1
pos  40 1  to  1
base is  0
pos  185 0  to  0
base is  3
pos  223 3  to  3

Thanks,

Jen



From vania.smirk at gmail.com  Mon Feb 13 16:07:20 2006
From: vania.smirk at gmail.com (VSmirk)
Date: 13 Feb 2006 13:07:20 -0800
Subject: hard disk activity
In-Reply-To: <7xfymn0yda.fsf@ruckus.brouhaha.com>
References: <1139850420.902979.71620@o13g2000cwo.googlegroups.com>
	<g9i1v1lbf2rhmgskmkh5f9mt73s67umckk@4ax.com>
	<1139857505.376840.37440@g43g2000cwa.googlegroups.com>
	<1139859890.407497.124870@o13g2000cwo.googlegroups.com>
	<1139863885.755813.324450@g47g2000cwa.googlegroups.com>
	<7xfymn0yda.fsf@ruckus.brouhaha.com>
Message-ID: <1139864840.300396.170070@o13g2000cwo.googlegroups.com>

Aweseme!!!  I got as far as segmenting the large file on my own, and I
ran out of ideas.  I kind of thought about checksum, but I never put
the two together.

Thanks.  You've helped a lot....

V



From duncan.booth at invalid.invalid  Wed Feb 15 03:30:58 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 15 Feb 2006 08:30:58 GMT
Subject: Self-identifying functions and macro-ish behavior
References: <1139989639.323304.239680@g43g2000cwa.googlegroups.com>
Message-ID: <Xns976B569D1474Aduncanbooth@127.0.0.1>

Michael wrote:

> def func2():
>     <do some stuff 2>
>     print <self-name>
>     return True
> 
> I imagine this means things like closures which I'm not familiar with
> (I'm not a CS person).  In this case, each function is part of a class,
> so I imagine I can take a dir() of the class if necessary.

Use the inspect module to find out what you need.

> 
> This leads into my next related question, which is How do I get some
> sort of macro behavior so I don't have to write the same thing over and
> over again, but which is also not neatly rolled up into a function,
> such as combining the return statements with a printing of <self-name>?

By rolling it up neatly in a function?

>>> def printcaller():
    print inspect.stack()[1][3]
    return True

>>> def func1():
    return printcaller()

>>> func1()
func1
True

But remember this prints the name under which the function was created, not 
the name of the variable in which it is stored:

>>> func2 = func1
>>> func2()
func1



From rtilley at vt.edu  Wed Feb  8 08:53:38 2006
From: rtilley at vt.edu (rtilley)
Date: Wed, 08 Feb 2006 08:53:38 -0500
Subject: os.walk() dirs and files
In-Reply-To: <Xns97648B528F8DDduncanbooth@127.0.0.1>
References: <dscrjr$joa$1@solaris.cc.vt.edu> <dscs1j$k9l$1@solaris.cc.vt.edu>
	<Xns97648B528F8DDduncanbooth@127.0.0.1>
Message-ID: <dsct5a$lsp$1@solaris.cc.vt.edu>

Duncan Booth wrote:

> How about just concatentating the two lists:
> 
>>for root, dirs, files in os.walk(path):
>        for fs_object in files + dirs:
>>         ADD fs_object to dictionary

Thank you Duncan! that solves the problem perfectly!


From mark at mark-fink.de  Sun Feb  5 09:37:32 2006
From: mark at mark-fink.de (Mark Fink)
Date: 5 Feb 2006 06:37:32 -0800
Subject: rexec in jython??
References: <1139138133.072742.282710@z14g2000cwz.googlegroups.com>
	<1139140115.016898.72360@z14g2000cwz.googlegroups.com>
	<1139142998.236991.130470@g47g2000cwa.googlegroups.com>
	<44mb0pF2rqu1U1@uni-berlin.de>
	<1139146174.981081.108700@o13g2000cwo.googlegroups.com>
	<44md0kF2nkeqU1@uni-berlin.de>
Message-ID: <1139150251.962289.52370@o13g2000cwo.googlegroups.com>

:-))) it works!
I replaced it to "return eval(s)" and the results look extremely well
guess I should get one of this crystal balls myself.

one minor issue is still left:
correct me if I am wrong: result of 2/-3 is 0 (at least this is how it
is defined in the testcase)
In Jython 2.1.3:
>>> 2/-3
-1
Anyway many thanks for your help. Without this would have taken forever.



From apardon at forel.vub.ac.be  Fri Feb  3 09:53:12 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 3 Feb 2006 14:53:12 GMT
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<1138974596.694169.198840@g44g2000cwa.googlegroups.com>
Message-ID: <slrndu6rin.qei.apardon@rcpc42.vub.ac.be>

Op 2006-02-03, Ben Sizer schreef <kylotan at gmail.com>:
>
> n.estner at gmx.de wrote:
>> The main reason (at least for me) is that there's simply too much
>> "magic" in it. Why does the expression left of the '.' get promoted to
>> the first parameter?
>
> One of the reasons I like Lua is because it doesn't do this, instead
> using the : operator to designate method-style calls.
>
> eg.
> a:foo(b, c) -- looks up foo within a, and calls it with (a, b, c) as
> parameters
> a.foo(b, c) -- looks up foo within a, and calls it with (b,c) as
> parameters
>
> This means there doesn't need to be a distinction between methods and
> functions, just a different operator to treat a function as if it was a
> method.

That is nice. I wonder if the following is possible in Lua:

  fun = a:foo
  fun(b, c)

with the same effect as:

  a:foo(b, c)

-- 
Antoon Pardon


From claird at lairds.us  Tue Feb 14 10:08:04 2006
From: claird at lairds.us (Cameron Laird)
Date: Tue, 14 Feb 2006 15:08:04 GMT
Subject: Is python very slow compared to C
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<43F01749.2000601@REMOVEMEcyber.com.au>
	<1139809484.447810.17000@g44g2000cwa.googlegroups.com>
	<1haq02x.edwa44e4u7r6N%aleaxit@yahoo.com>
Message-ID: <te69c3-1dr.ln1@lairds.us>

In article <1haq02x.edwa44e4u7r6N%aleaxit at yahoo.com>,
Alex Martelli <aleaxit at yahoo.com> wrote:
			.
			.
			.
>Javascript has leveraged its early advantage in the Netscape browser to
>become the only "universally available" language for client-side "in the
>browser" execution, and thus established a foothold in a strong and
>growing niche for prototype based, rather than class based, object
>models. However, there doesn't appear to be further spreading of such
>object models; "big" new languages like C# (and indeed the whole
>underlying CLR framework, which also forced the semantics of VB) are
>strongly class-based.
>
>
>Alex

Were we to deepen this analysis, the next aspect to examine is that,
in my estimation, the JavaScript user community is unusual in the
extent to which its users don't aspire to comprehensive understanding.
Say to a Java or Eiffel or Lua programmer, "You didn't know about
{inner definitions|nested dictionaries|...}," and my bet is he'll say,
"Tell me more."  Tell the majority of JS users that they don't seem to
be aware of inheritance constructs, and they respond, "So?"

That's a crude generalization, but one I think useful.

If true, it helps explain the comparative lack of penetration of 
prototype-based object orientation.


From jeff at schwabcenter.com  Mon Feb 20 16:26:10 2006
From: jeff at schwabcenter.com (Jeffrey Schwab)
Date: Mon, 20 Feb 2006 21:26:10 GMT
Subject: why does close() fail miserably on popen with exit code -1 ?!
In-Reply-To: <1140416836.030294.289800@f14g2000cwb.googlegroups.com>
References: <1140416836.030294.289800@f14g2000cwb.googlegroups.com>
Message-ID: <StqKf.15045$915.11149@southeast.rr.com>

Atanas Banov wrote:
> i ran onto this weirdness today: seems like close() on popen-ed
> (pseudo)file fails miserably with exception instead of returning exit
> code, when said exit code is -1.
> 
> here is the simplest example (under Windows):
> 
> 
>>>>print popen('exit 1').close()
> 
> 1
> 
>>>>print popen('exit -1').close()
> 
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
> IOError: (0, 'Error')
> 
>>>>print popen('exit -2').close()
> 
> -2
> 
> has anyone have idea why is that?

_PyPclose returns the exit status of the popened process (the popenee?), 
or -1 on error.  Of course, if the status is supposed to be -1, there's 
some confusion.

In the snippet of code below (from Modules/posixmodule.c), result has 
been initialized to the output of fclose, which in your case is 0.  The 
comment is particularly handy.

	if (result != EOF &&
	    waitpid(pipe_pid, &exit_code, 0) == pipe_pid)
	{
		/* extract exit status */
		if (WIFEXITED(exit_code))
		{
			result = WEXITSTATUS(exit_code);
		}
		else
		{
			errno = EPIPE;
			result = -1;
		}
	}
	else
	{
		/* Indicate failure - this will cause the file object
		 * to raise an I/O error and translate the last
		 * error code from errno.  We do have a problem with
		 * last errors that overlap the normal errno table,
		 * but that's a consistent problem with the file object.
		 */
		result = -1;
	}


From enleverlesX.XmcX at XmclaveauX.com  Sat Feb 25 04:53:04 2006
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI)
Date: Sat, 25 Feb 2006 10:53:04 +0100
Subject: [Python-de] PyUNO with different Python
References: <43FC85CB.3060102@gmx.net>
	<mailman.2317.1140647045.27775.python-list@python.org>
Message-ID: <440061a4$1$29193$8fcfb975@news.wanadoo.fr>

Bonjour !

J'ai des probl?mes/besoins similaires.
Mais, d?sol?, je ne parle pas allemand...

@-salutations

Michel Claveau





From kent at kentsjohnson.com  Mon Feb 27 21:41:39 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Mon, 27 Feb 2006 21:41:39 -0500
Subject: sort one list using the values from another list
In-Reply-To: <du0bfc$7lj$1@news.yaako.com>
References: <mailman.2447.1140969980.27775.python-list@python.org>
	<4401d314_2@newspeer2.tds.net> <dtula8$r30$1@news.yaako.com>
	<dtv12h$dl2$1@wake.carmen.se> <du0bfc$7lj$1@news.yaako.com>
Message-ID: <4403b3c3_2@newspeer2.tds.net>

Simon Sun wrote:
> Magnus Lycka wrote:
> 
>>Is there something here I can't see, or did you just
>>change a variable name and present that as another
>>solution?
> 
> Heh, I have use python for a very short time. Base your statements, I test
> in python, found `_' is a valid variable name. So I don't know it is a just
> a plain variable or like something pattern matching in Haskell.

_ is just a plain variable name in Python. It is sometimes when a 
variable is needed to receive a value that won't be used. So your 
example was correct and idiomatic but functionally identical to mine.

Kent


From steve at REMOVETHIScyber.com.au  Thu Feb 23 17:19:39 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 24 Feb 2006 09:19:39 +1100
Subject: "Temporary" Variable
References: <1140665472.203495.7570@g44g2000cwa.googlegroups.com>
	<43FD6645.3020201@REMOVEMEcyber.com.au>
	<1140725159.143882.202630@j33g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.23.22.19.38.642977@REMOVETHIScyber.com.au>

On Thu, 23 Feb 2006 12:05:59 -0800, darthbob88 wrote:

My comments inserted inline.


> #!/usr/bin/python
> #simple guessing game, with numbers
> import random
> spam = random.randint(1, 100)

It is bad programming practice to give variables uninformative joke names.

How about target instead?

> print spam #debugging purposes
> while 1:
> 	guess = raw_input("What's your guess, friend? ")

Why don't you stick a "print guess" in here to see what your guess is?

(Hint: what is the difference between 1 and '1'?)

> 	if guess == spam:
> 		print "You got it! Nicely done."
> 		break
> 	elif guess < spam:
> 		print "Sorry, too low. Try again."
> 	elif guess > spam:
> 		print "Sorry, too high. Try again."
> 	else:
> 		print "You guessed ", guess



>> You could try this:
>>
>> while 1:
>>      var = raw_input("Give me some data! ")
>>      if var == "some data":
>>          print "Success!"
>>          break
>>      else:
>>          print "No good, try again."
> That works fine with strings and when "some_data" is hardcoded. I run
> into trouble when "some data" is replaced with a number, unquoted. It
> simply says "No good, etc"

Try this, at a command line:

5 == '5'


and see what you get.


-- 
Steven.



From grante at visi.com  Wed Feb 22 09:11:32 2006
From: grante at visi.com (Grant Edwards)
Date: Wed, 22 Feb 2006 14:11:32 -0000
Subject: Pyserial never read
References: <1140105936.408387.88130@z14g2000cwz.googlegroups.com>
	<1140219414.143448.234450@z14g2000cwz.googlegroups.com>
	<1140302110.028540.176210@g43g2000cwa.googlegroups.com>
	<slrndvm0sr.6k1.nick@irishsea.home.craig-wood.com>
	<mailman.2241.1140536285.27775.python-list@python.org>
	<slrndvn1ad.he1.nick@irishsea.home.craig-wood.com>
Message-ID: <11vos8kmj2dduff@corp.supernews.com>

On 2006-02-22, Nick Craig-Wood <nick at craig-wood.com> wrote:

>>  Anything's possible, but given that in his original post he says it 
>>  works when he uses Delphi, it seems unlikely making a change to the 
>>  hardware is necessary.
>
> Sorry missed that bit!
>
> Pyserial works very well in my experience (under linux).

I've used it extensively under both Linux and Win32, and it
works very well under both.  

> Serial ports are generally a pain though ;-)

That's the truth.

-- 
Grant Edwards                   grante             Yow!  Somewhere in Tenafly,
                                  at               New Jersey, a chiropractor
                               visi.com            is viewing "Leave it to
                                                   Beaver"!


From infini.g at gmail.com  Wed Feb  1 20:06:30 2006
From: infini.g at gmail.com (infini.g at gmail.com)
Date: 1 Feb 2006 17:06:30 -0800
Subject: cgi - secure sessions
Message-ID: <1138842390.012855.107610@g44g2000cwa.googlegroups.com>

Hey,

I was just wondering if / how would it be possible to create secure
sessions for a website using Python CGI... I thought of using cookies,
and things looked promising for a while; I could login through a form
which pointed to a cgi script which created sent the user cookies, but
I found that when a script to detect the cookies was run through a
server side include line in the html, it couldn't get any cookies, but
it would work fine when run directly through the browser (which is
useless to me).

If anybody could help with this it would be great. Python is the only
programming language that I'm relatively comfortable in at the moment,
so using the usual PHP or Javascript just isn't an option for me
unfortunately.

GazaM



From nicogrubert at gmail.com  Tue Feb 14 02:49:53 2006
From: nicogrubert at gmail.com (Nico Grubert)
Date: Tue, 14 Feb 2006 08:49:53 +0100
Subject: Splitting a string
Message-ID: <43F18BA1.8010304@gmail.com>

Dear Python users,

I'd like to split a string where 'and', 'or', 'and not' occurs.

Example string:
s = 'Smith, R. OR White OR Blue, T. AND Black AND Red AND NOT Green'

I need to split s in order to get this list:
['Smith, R.', 'White', 'Blue, T.', 'Back', 'Red', 'Green']

Any idea, how I can split a string where 'and', 'or', 'and not' occurs?


Thank you very much in advance,
Nico


From codecraig at gmail.com  Mon Feb 13 11:23:36 2006
From: codecraig at gmail.com (py)
Date: 13 Feb 2006 08:23:36 -0800
Subject: Execute batch script on remote computer
In-Reply-To: <mailman.1837.1139847157.27775.python-list@python.org>
References: <mailman.1837.1139847157.27775.python-list@python.org>
Message-ID: <1139847816.263826.199730@o13g2000cwo.googlegroups.com>

WMI will work, i can create a new Win32_Process.  XML_RCP would be
nice, but probably to much for what i need.

thanks.



From daniel.dittmar at sap.corp  Thu Feb 23 12:12:18 2006
From: daniel.dittmar at sap.corp (Daniel Dittmar)
Date: Thu, 23 Feb 2006 18:12:18 +0100
Subject: Using repr() with escape sequences
In-Reply-To: <1140713377.854836.282810@z14g2000cwz.googlegroups.com>
References: <1140708756.484933.13390@z14g2000cwz.googlegroups.com>
	<pan.2006.02.23.15.53.28.462638@REMOVETHIScyber.com.au>
	<1140713377.854836.282810@z14g2000cwz.googlegroups.com>
Message-ID: <dtkqdh$eid$1@news.sap-ag.de>

nummertolv wrote:
> - Consider a string variable containing backslashes.
> - One or more of the backslashes are followed by one of the letters
> a,b,f,v or a number.
> 
> myString = "bar\foo\12foobar"
> 
> How do I print this string so that the output is as below?
> 
> bar\foo\12foobar
> 
> typing 'print myString' prints the following:
> 
> bar
oo
> foobar
> 
> and typing print repr(myString) prints this:
> 
> 'bar\x0coo\nfoobar'
> 

The interpretation of escape sequences happens when the Python compiler 
reads the string "bar\foo\12foobar". You'll see that when you do 
something like
 >>> map (ord, "bar\foo\12foobar")
[98, 97, 114, 12, 111, 111, 10, 102, 111, 111, 98, 97, 114]
This displays the ASCII values of all the characters.

If you want to use a string literal containing backslashes, use r'' strings:
 >>> myString = r'bar\foo\12foobar'
 >>> map (ord, myString)
[98, 97, 114, 92, 102, 111, 111, 92, 49, 50, 102, 111, 111, 98, 97, 114]
 >>> print myString
bar\foo\12foobar
 >>> print repr (myString)
'bar\\foo\\12foobar'

If you get the strings from an external source as suggested by your 
original post, then you really have no problem at all. No interpretation 
of escape sequences takes place when you read a string from a file.

Daniel


From sybrenUSE at YOURthirdtower.com.imagination  Fri Feb 10 02:50:42 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Fri, 10 Feb 2006 08:50:42 +0100
Subject: breaking from loop
References: <1139557074.938577.281250@f14g2000cwb.googlegroups.com>
Message-ID: <slrnduohfd.24j.sybrenUSE@schuimige.unrealtower.org>

Ritesh Raj Sarraf enlightened us with:
>                         bFound = True
>                         break
>                         return bFound

I see two weird things. First of all, the retun statement won't be
reached due to the break before it. Let's assume the break isn't
needed, and you want just the return. Why set the variable if you're
going to return anyway? I'd change those three lines to "return True".

> But since test directory is under temp, work_tree_copy makes two
> calls of the same function _but_ break only is able to get out from
> the inner call.

Raise an exception and catch it at the outer level.

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From crutcher at gmail.com  Mon Feb 27 01:30:28 2006
From: crutcher at gmail.com (Crutcher)
Date: 26 Feb 2006 22:30:28 -0800
Subject: PEP 354: Enumerations in Python
In-Reply-To: <87accdplbj.fsf@rose.polar.local>
References: <87accdplbj.fsf@rose.polar.local>
Message-ID: <1141021828.706947.156270@u72g2000cwu.googlegroups.com>

This seems great, except why can't I compare strings? It seems too
useful when dealing with user input, or parsing messages or config
files.

>>> Weekdays = enum('sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat')
>>> Weekdays.mon.__cmp__('mon')
0

Additionaly, perhaps the call method of the enumeration object should
construct a value from strings?
>>> Weekdays.mon == Weekdays('mon')



From per9000 at gmail.com  Fri Feb 24 08:10:37 2006
From: per9000 at gmail.com (per9000)
Date: 24 Feb 2006 05:10:37 -0800
Subject: problem(s) with import from parent dir: "from ../brave.py import
	sir_robin"
Message-ID: <1140786637.451247.16210@e56g2000cwe.googlegroups.com>

Dear Black Knight,

I have no quarrel with you sir Knight, but I must import your parents.


SHORT VERSION:

I tried three variants of "from ../brave.py import sir_robin", one
works. I want to use it in a py-file to execute command-line-style and
that does not work.

Can someone please give me, not a bucket with the desert(s) on top, but
just the thin chocolate?

/per9000 (per nine thousand at gmail dot com)


LONG VERSION:

Since I do not want to use absoute paths I want to import a file from
two folders up and then one down.

This problem seems to be discussed in:
http://starship.python.net/pipermail/python-au/2005/000543.html
I tried following it but I did not understand and/or try hard enough
and/or my father smells of elderberrys.

So...

...first I tried this: "from ../brave.py import sir_robin" (and
variants)

But all I got was syntax or import error(s).

----------

Then I tried to fool python by walking the path up with os.chdir('..')
in the line-by-line interpreter.
This (surprisingly) worked just fine.

C:\my\holy\grail\that_old_bridge>python
>>> import os
>>> os.chdir('../../py_scripts')
>>> os.getcwd()
'C:\\my\\holy\\py_scripts'
>>> from raw2nice_def import raw2nice
>>> os.listdir('.')
['raw2nice_def.py', 'raw2nice_def.pyc', 'temp']
>>> raw2nice
<function raw2nice at 0x00A28230>

----------

When I tried putting this into a program to execute command-line-style:

the interesting code:

import os
cwd = os.getcwd()
os.chdir('../../py_scripts')
print os.listdir('.')
from raw2nice_def.py import raw2nice
os.chdir(cwd)

output:

> "C:\another_bridge\python\python.exe" rawhtml2nicehtml_template.py
['raw2nice_def.py', 'raw2nice_def.pyc', 'temp']
Traceback (most recent call last):
  File "C:my\holy\grail\that_old_bridge\rawhtml2nicehtml_template.py",
line 10, in ?
    from raw2nice_def.py import raw2nice
ImportError: No module named raw2nice_def.py

The worst part here is that os.listdir('.') returns ['raw2nice_def.py',
'raw2nice_def.pyc', 'temp'] - meaning (to me) that Python really should
"feel" my nice file but somehow still does not see it.

To me this also means that python::command_line does not concurr with
python::line_by_line(!?!)

Can someone please give me, not a bucket with the desert(s) on top, but
just the thin chocolate?

/per9000 (per nine thousand at gmail dot com)



From fuzzyman at gmail.com  Wed Feb  8 06:34:20 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 8 Feb 2006 03:34:20 -0800
Subject: Detecting line endings
In-Reply-To: <1hadpni.1ne1raq17jjbyaN%aleaxit@yahoo.com>
References: <1139236514.022464.319970@g14g2000cwa.googlegroups.com>
	<1hacujo.1p81efw1ej38ioN%aleaxit@yahoo.com>
	<1139304588.446722.255240@o13g2000cwo.googlegroups.com>
	<1hadpni.1ne1raq17jjbyaN%aleaxit@yahoo.com>
Message-ID: <1139398460.602597.54340@g14g2000cwa.googlegroups.com>


Alex Martelli wrote:
> Fuzzyman <fuzzyman at gmail.com> wrote:
>    ...
> > > Open the file with 'rU' mode, and check the file object's newline
> > > attribute.
> >

Just to confirm, for a UTF16 encoded file, the newlines attribute is
``None``.

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml



From felipe.lessa at gmail.com  Tue Feb 14 20:17:08 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Tue, 14 Feb 2006 23:17:08 -0200
Subject: Newbie
In-Reply-To: <43F27BAC.2060606@gmail.com>
References: <v3JHf.2731$lo3.2501@trnddc07>
	<43ef6433$0$25387$636a55ce@news.free.fr> <HZJHf.2737$lo3.1139@trnddc07>
	<1139806792.698674.168530@g44g2000cwa.googlegroups.com>
	<PCuIf.32401$lo3.15259@trnddc07> <1139963955.22163.6.camel@kenshin>
	<43F27BAC.2060606@gmail.com>
Message-ID: <1139966229.22163.15.camel@kenshin>

Em Ter, 2006-02-14 ?s 19:54 -0500, Ken Stevens escreveu:
> Some people or group of people decided bottom posting was better and it 
> MUST be that way. To me that even goes against one of the main 
> philosophies of Linux which is that of choice. So, to any who think, 
> otherwise... there is absolutely NOTHING wrong or incorrect about TOP 
> posting. OK, rant mode off. I feel better now! I got that off my chest!

I don't want to start another discussion about this (the ck mailing list
had one these days), but this has nothing to do about choice: it's a
convention. And I don't think you want even to try to send a patch to
Linus with code conventions he doesn't like.

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From grante at visi.com  Sat Feb 25 10:38:08 2006
From: grante at visi.com (Grant Edwards)
Date: Sat, 25 Feb 2006 15:38:08 -0000
Subject: Import in a separate thread
References: <1140869286.548125.17710@p10g2000cwp.googlegroups.com>
	<mailman.2426.1140871920.27775.python-list@python.org>
	<1140881025.513094.236590@e56g2000cwe.googlegroups.com>
Message-ID: <1200uf0kru4el0f@corp.supernews.com>

On 2006-02-25, cyberco <cyberco at gmail.com> wrote:

> Well, it is for the python implementation for Nokia Series 60 phones,
> and loading lots of modules in such constrained environments can
> certainly slow things down. The splashscreen idea is what I want to do,
> but that requires the loading to continue in a background thread.

Ah, so you're _not_ trying to speed things up.  You just want
to re-arrange the order in which things happen.  While threads
rarely help the former, they do work well for the latter.

-- 
Grant Edwards                   grante             Yow!  You should all JUMP
                                  at               UP AND DOWN for TWO HOURS
                               visi.com            while I decide on a NEW
                                                   CAREER!!


From eoinrogers at gmail.com  Sun Feb  5 10:52:34 2006
From: eoinrogers at gmail.com (Byte)
Date: 5 Feb 2006 07:52:34 -0800
Subject: Learning Python
Message-ID: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>

I know this is probably a stupid question, but I'm learning Python, and
am trying to get the if function to work with letters/words. Basicly,
I'm trying to write a script that when run, says

Please enter your name:

Then, if the user types myself as the name , the output is OK. Thats
all I want it to do (remember, Im just new). The code Ive tryed is:


x = input(raw_input("Please enter your name: "))
if x==myself: print 'OK'

It kinda works - I can get to the please enter your name bit but then
it simply reprints your input as output. Someone please HELP!

p.s. Im using Ubuntu Linux 5.10 "Breezy Badger". Dont know if you need
that info, but just in case.



From abhisek.datta at gmail.com  Fri Feb 17 09:49:52 2006
From: abhisek.datta at gmail.com (Abhisek Datta)
Date: Fri, 17 Feb 2006 14:49:52 +0000
Subject: RSA in python
Message-ID: <4e4a257e0602170649j276caf94n6e8bc0f3bcd44d05@mail.gmail.com>

Hello,

I am looking for good RSA implementations in python that can import a
public key in PEM format and encrypt a buffer using the imported
public key. I tried m2crypto, but somehow it is giving me exceptions
which I couldnt solve as of now.

I get the following with m2crypto:
rsa = M2Crypto.RSA.load_pub_key("pubkey.pem")
gives me:
  File "KB_Client.py", line 63, in SessionInit
    rsa = M2Crypto.RSA.load_pub_key("pubkey.pem")
  File "/usr/lib/python2.4/site-packages/M2Crypto/RSA.py", line 225,
in load_pub_key
    return load_pub_key_bio(bio)
  File "/usr/lib/python2.4/site-packages/M2Crypto/RSA.py", line 237,
in load_pub_key_bio
    rsa_error()
  File "/usr/lib/python2.4/site-packages/M2Crypto/RSA.py", line 162,
in rsa_error
    raise RSAError, m2.err_reason_error_string(m2.err_get_error())
M2Crypto.RSA.RSAError: no start line


Any help will be highly appreciated.

Regards,
-abhisek


From no at spam.com  Sun Feb 19 00:35:27 2006
From: no at spam.com (DH)
Date: Sat, 18 Feb 2006 23:35:27 -0600
Subject: Python vs. Lisp -- please explain
In-Reply-To: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
Message-ID: <Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>

63q2o4i02 at sneakemail.com wrote:
> A few years ago I
> had an AI class where we had to use Lisp, and I absolutely hated it,
> having learned C++ a few years prior.  They didn't teach Lisp at all
> and instead expected us to learn on our own.

CS classes haven't changed, I see.

> In learning Python I've read more about Lisp than when I was actually
> trying to learn it, and it seems that the two languages have lots of
> similarities:
> 
> http://www.norvig.com/python-lisp.html
> 
> I'm wondering if someone can explain to me please what it is about
> Python that is so different from Lisp that it can't be compiled into
> something as fast as compiled Lisp?  From this above website and
> others, I've learned that compiled Lisp can be nearly as fast as C/C++,
> so I don't understand why Python can't also eventually be as efficient?
>  Is there some *specific* basic reason it's tough?  Or is it that this
> type of problem in general is tough, and Lisp has 40+ years vs Python's
> ~15 years?

It is by design. Python is dynamically typed.  It is essentially an 
interpreted scripting language like javascript or ruby or perl, although 
python fans will be quick to tell you python is compiled to byte code. 
They'll also be quick to tell you:
-python has true closures (although nothing like ruby's blocks)
-is beginner friendly (despite being case sensitive and 3/4==0, for example)
-is not, in fact, slow at all (despite benchmarks as you noted showing 
otherwise).
Judge for yourself.

There are projects that combine static typing + the python syntax, which
result in dramatically faster code, but perhaps only 80% of python's
functionality and less flexibility you get from dynamic typing. 
Projects like shedskin.  But some python fans don't think 80% cuts it, 
even if you do get a 100 fold speed increase.


From dcrespo at gmail.com  Tue Feb 21 10:39:35 2006
From: dcrespo at gmail.com (Daniel Crespo)
Date: 21 Feb 2006 07:39:35 -0800
Subject: PDF on dot matrix printers
Message-ID: <1140536375.864494.206860@g47g2000cwa.googlegroups.com>

Hi to all,

Does anyone know about how to make a dot matrix printer print a PDF
file with the quality of a Microsoft Word printing?

When I print from Microsoft Word, the output is perfect for the kind of
printer. But, from a PDF file, the characters are distortionated in an
uniform way. With "uniform" I mean that no matter where I put the
characters in the page, the character "e" always will be smaller than
an "a". So, when seeing the output page, and trying to read what it has
written, you realize that the characters have different heights... It
could be a matter of resolution, obviously not in the printer, but in
the PDF. So I'm wondering if there are some tasks that I could do for
accomplish it.

Thanks for reading

Daniel



From greg.steffensen at gmail.com  Fri Feb 24 22:58:22 2006
From: greg.steffensen at gmail.com (gsteff)
Date: 24 Feb 2006 19:58:22 -0800
Subject: PyGTK + Glade = weird problem
In-Reply-To: <1140839146.072788.25120@j33g2000cwa.googlegroups.com>
References: <1140831896.360625.172620@p10g2000cwp.googlegroups.com>
	<1140838606.845184.304500@u72g2000cwu.googlegroups.com>
	<1140839146.072788.25120@j33g2000cwa.googlegroups.com>
Message-ID: <1140839902.199924.249180@z34g2000cwc.googlegroups.com>

Sorry about that.  Your problem is that the show_hide_janela method is
setup to be called both on  a gtk signal ("destroy") and an
event("delete_event").  Callback methods for events take a slightly
different signature than signals; they take one extra argument, which
represents the triggering event.  When you close the window, the
delete_event is triggered, which calls show_hide_janella, but the call
fails, because show_hide_janella is called with 3 arguments, when its
only expecting 2.  So, to fix the code you have posted in the thread
you linked, replace the line

    def show_hide_janela(self,obj):

with the line

    def show_hide_janela(self,obj, event=None):

The modified code works on my machine.  Hope this helps,

Greg



From daniel.dittmar at sap.corp  Wed Feb 15 11:30:21 2006
From: daniel.dittmar at sap.corp (Daniel Dittmar)
Date: Wed, 15 Feb 2006 17:30:21 +0100
Subject: low level data types
In-Reply-To: <1140020594.762674.162840@g47g2000cwa.googlegroups.com>
References: <1140005257.773955.32860@g14g2000cwa.googlegroups.com>
	<mailman.1951.1140015161.27775.python-list@python.org>
	<1140020594.762674.162840@g47g2000cwa.googlegroups.com>
Message-ID: <dsvkut$pkh$1@news.sap-ag.de>

dementrio wrote:
> Thanks for the hint!
> 
> However now I have another problem - endianness (the client runs on
> powerpc, the server on x86). I found that simply reversing the stuff I
> recv() works, but is there any cleaner way for taking care of this?
> 

http://docs.python.org/lib/module-struct.html
and search for "Alternatively, the first character of the format string 
can be used to indicate the byte order"

Daniel


From usenet-2004 at lithe.de  Sun Feb 12 15:39:43 2006
From: usenet-2004 at lithe.de (Jan Niklas Fingerle)
Date: 12 Feb 2006 20:39:43 GMT
Subject: super(...).__init__() vs Base.__init__(self)
References: <43eb5a9d$1_2@newspeer2.tds.net>
	<K5mdnTQ_1Ime4XbeRVn-ig@comcast.com>
	<43eba7f7$0$507$9b4e6d93@newsread4.arcor-online.net>
	<*firstname*nlsnews-14ADC6.23042609022006@news.verizon.net>
Message-ID: <43ef9d0f$0$13606$9b4e6d93@newsread2.arcor-online.net>

Tony Nelson <*firstname*nlsnews at georgea*lastname*.com> wrote:
> In article <43eba7f7$0$507$9b4e6d93 at newsread4.arcor-online.net>,
>  Jan Niklas Fingerle <usenet-2004 at lithe.de> wrote:
> 
> > ...Super is a good tool to use, when dealing with
> > diamond shape inheritance. In any other case I would use the direct
> > calls to the base classes. In fact, i've yet to find a non-textbook-case
> > where I really need diamond shape inheritance. ...
> 
> As long as you don't use multiple inheritance with new-style classes, 
> you'll be fine.

OK, I should have written: "... diamond shape inheritance where the base
class's methods have to be called cooperatively ..."

In other words: In almost every real world example of diamond shape
inheritance where the base class is "only" object we don't have a
problem, because you don't have to call object's __init__, yet it causes
no harm if you call it twice - and __init__ is the *the* method you most
commonly would use "super()" for.

So, yes, "no multiple inheritance" is sufficient, but not nessecary to
live happily without ever using "super()".

Nothing against super where it's appropiate. But don't optimize for
("real") diamond shape inheritance, before you really need it...

Cheers,
  --Jan Niklas


From scott.daniels at acm.org  Sun Feb  5 11:16:36 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sun, 05 Feb 2006 08:16:36 -0800
Subject: Does Python support a peek like method for its file objects?
In-Reply-To: <4s3bu1p178o46hh0jcj0eld5git5paog4q@4ax.com>
References: <4s3bu1p178o46hh0jcj0eld5git5paog4q@4ax.com>
Message-ID: <43e623c5@nntp0.pdx.net>

Avi Kak wrote:
>   Does Python support a peek like method for its file objects?

A short answer is, "No, it does not."  Peek was (I believe) put into
Pascal to simplify certain problems; language processing , for example,
is drastically simplified by 1-character look-ahead.  Pascal was
designed as a teaching language, and it provided primitives to ease
the work students did, rather than reflect the realities of an
underlying I/O system.  Building usable Pascal runtimes was a pain in
the posterior for precisely this reason.

Often you can build simple code to accomplish your task without
implementing a full peek.  Peek affects: read, tell, relative seeks,
end-of-file processing, and waits for user interaction.  usually you
need nearly none of this.  Maybe all you need is a layer around a
reader with a "pushback" function.

class ReaderWithPushback(object):
         def __init__(self, somefile):
             self._read = somefile.read
             self.held = ''
             self.sawEOF = False

         def read(self, length):
             assert length > 0
             while len(self.held) < length and not self.sawEOF:
                 chunk = self._read(length - len(self.held))
                 if chunk:
                     self.held += chunk
                 else:
                     self.sawEOF = True
             if len(self.held) > length:
                 self.held, result = (self.held[length :],
                                      self.held[: length])
             else:
                 self.held, result = '', self.held
             return result

         def pushback(self, somestuff):
             self.held = somestuff + self.held

         def peek(self, length=1):
             data = self.read(length)
             self.pushback(data)
             return data

--Scott David Daniels
scott.daniels at acm.org


From gdamjan at gmail.com  Mon Feb 13 19:04:44 2006
From: gdamjan at gmail.com (Damjan)
Date: 13 Feb 2006 16:04:44 -0800
Subject: ANNOUNCE: Mod_python 3.2.7
In-Reply-To: <20060213104603.V24288@grisha.dyndns.org>
References: <20060213104603.V24288@grisha.dyndns.org>
Message-ID: <1139875484.037011.282610@g43g2000cwa.googlegroups.com>

Just upgraded from 3.1.4 / Apache-2.0.55, and I can confirm that both
moin-1.5 and trac-0.9.3 continued to work without problems.



From claudio.grondi at freenet.de  Fri Feb  3 20:57:49 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Sat, 04 Feb 2006 02:57:49 +0100
Subject: Global variables, Classes, inheritance
In-Reply-To: <uc08u1p09gleqcbasarcg1714rir7t0vrs@4ax.com>
References: <uc08u1p09gleqcbasarcg1714rir7t0vrs@4ax.com>
Message-ID: <ds11n0$lhq$1@newsreader3.netcologne.de>

DaveM wrote:
> Although I've programmed for fun - on and off - since the mid 70's, I'm
> definitely an OO (and specifically Python) beginner. 
> 
> My first question is about global variables. Are they, as I'm starting to
> suspect, a sin against God or just best avoided? Having got my current
> application working using them, I'm not sure whether I want to refactor it,
> but equally, I'd like to write the best code I can.
For me global variables in Python are not that much sin as global 
variables in another languages (as e.g. C/C++).
> 
> Secondly (and this is related),  if you have multiple instances of the same
> class, but need them all to have access to a dictionary created at run-time,
> is there a class way to this without calling the creation method multiple
> times? The best thought I've come up with is for the class instance to check
> its name and only if it's the first one do the dictionary creation, but I
> haven't tried it yet.
> 
> My third difficulty is with variables in a class. What's the difference
> between the following?:
> 
> class Foo:
>     i = 12345
>     ...
> 
> class Foo:
>     self.i = 12345
>     ...
> 
> class Foo:
>     def __init__(self):
>         self.i = 12345
>         ...
> 
> class Foo:
>     def __init(self):
>         i = 12345
>         ...
> 
> DaveM

Before some expert will enlighten you and provide appropriate links, you 
can just try to run what you have listed (e.g. to see what is broken) 
and watch the outcome.

Maybe it is a good idea to try to look at globals() and locals() to see 
what and when happens and take a look at the documentation to see what 
this functions are about.

Claudio


From bearophileHUGS at lycos.com  Wed Feb 22 19:44:04 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 22 Feb 2006 16:44:04 -0800
Subject: Pythonic gui format?
In-Reply-To: <pan.2006.02.15.23.38.07.315819@gmx.net>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<43f11990$0$667$626a54ce@news.free.fr>
	<a9KdnTPXHOGOr2zenZ2dnUVZ_vidnZ2d@comcast.com>
	<43f19d88$0$4761$636a55ce@news.free.fr>
	<HrKdnTDaI9YCfmzeRVn-pg@comcast.com>
	<43f1e5c1$0$4756$636a55ce@news.free.fr>
	<t9mdncjHu9hxE2_eRVn-oA@comcast.com>
	<pan.2006.02.15.23.38.07.315819@gmx.net>
Message-ID: <1140655444.427463.78380@o13g2000cwo.googlegroups.com>

Sorry for the late reply, I have some ideas about a possible GUI
toolkit design (that works with one already done like GTK), I'll
probably show them here. In the meantime I can show this one:
http://thinlet.sourceforge.net/home.html

I like it because the way GUIs are defined is quite short.

bye,
Bearophile



From george.sakkis at gmail.com  Fri Feb 10 21:11:16 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 10 Feb 2006 18:11:16 -0800
Subject: breaking from loop
References: <1139557074.938577.281250@f14g2000cwb.googlegroups.com>
	<dshk7o$i92$02$1@news.t-online.com>
	<1139579096.471160.292300@g14g2000cwa.googlegroups.com>
Message-ID: <1139623876.053731.60440@g44g2000cwa.googlegroups.com>

Using the (non-standard yet) path module
(http://www.jorendorff.com/articles/python/path/), your code can be
simplified to:

from path import path, copy

def copy_first_match(repository, filename, dest_dir):
    try:
        first_match = path(repository).walkfiles(filename).next()
    except StopIteration:
        return False
    else:
        copy(first_match, dest_dir)
        return True


I/O exceptions are left to propagate to the caller.

George



From roy at panix.com  Wed Feb  8 18:40:43 2006
From: roy at panix.com (Roy Smith)
Date: Wed, 8 Feb 2006 23:40:43 +0000 (UTC)
Subject: Ternary Operator Now?
References: <1139439694.312028.145280@g43g2000cwa.googlegroups.com>
	<mailman.1634.1139441459.27775.python-list@python.org>
Message-ID: <dsdvhr$edp$1@reader2.panix.com>

Steve Holden  <steve at holdenweb.com> wrote:
>> x = y if C : else z
>> 
>
>Currently scheduled for next (2.5) release, but not yet implemented.

This still makes me barf.  Has Python jumped the shark?

It looks marginally better if you write it as:

x = (y if C else z)


From fuzzyman at gmail.com  Thu Feb  2 04:08:52 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 2 Feb 2006 01:08:52 -0800
Subject: cgi - secure sessions
In-Reply-To: <1138844380.094365.223840@g44g2000cwa.googlegroups.com>
References: <1138842390.012855.107610@g44g2000cwa.googlegroups.com>
	<7x8xsuczxz.fsf@ruckus.brouhaha.com>
	<1138844380.094365.223840@g44g2000cwa.googlegroups.com>
Message-ID: <1138871331.983318.58170@f14g2000cwb.googlegroups.com>


GazaM wrote:
> wow, those were some seriously quick replies, thanks. I understand that
> cookies is the best way to do things, but I didn't explain my problem
> well, sorry.
>
> Basically, I have a blog in the works and I want to have an online
> interface for posting. What I have is a cgi script run through a server
> side include line in the html, which looks for the session cookie, if
> it is present will say 'logged in as "user"' and if the cookie isn't
> there will display a login form. Now, the big showstopper here is that,
> because session cookies are stored in http headers sent by the client
> (afaik) the cgi script can't get any, because the http headers are
> passed onto the html file and any cgi scripts inside don't get
> anything... is there a workaround possible? I need to use an include
> line instead of pointing to the script and making it output full html
> as there are various other scripts run in the html as well, plus I am
> hoping to use the cookie-detection script in other ways than just the
> home page...
>

logintools is a Python CGI framework for logins and account management.
You could also 'overload' the account management to provide session
management if you want. (You'd have to be careful if the user could
potentially run more than one session simultaneously - maybe I can
build support into logintools for this).

It includes functions to *tell* if a user is logged in, and can also
automatically divert the user to a login page if you want.

It uses HTML templates so you can customise the appearance of the pages
it generates. It will handle sign-ups (you can allow new sign-ups or
not), user account management, and adminastrative account management.

You can also choose whether to use session cookies (only exists whilst
the same browser window is open - after that the user must login), or
set a length of time the cookie is valid for.

    http://www.voidspace.org.uk/python/logintools.html

I'm happy to provide support via the Pythonutils mailing list :

    http://groups.google.com/group/pythonutils

The best place to start might be an example application, like protected
page :

    http://www.voidspace.org.uk/python/cgi.shtml

This doesn't use the features to tell you if the user is logged in (it
just prevents access to the application if the user isn't logged in -
and presents them with a login page). It's a good place to start
though.

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml

> Again, any help is appreciated.
> 
> GazaM



From bronger at physik.rwth-aachen.de  Wed Feb 22 08:41:58 2006
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Wed, 22 Feb 2006 14:41:58 +0100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com> <43fbc788@usenet01.boi.hp.com>
	<87u0ar3gba.fsf@wilson.homeunix.com>
	<pan.2006.02.22.11.35.14.90948@REMOVETHIScyber.com.au>
Message-ID: <87bqwzjys9.fsf@wilson.homeunix.com>

Hall?chen!

Steven D'Aprano <steve at REMOVETHIScyber.com.au> writes:

> On Wed, 22 Feb 2006 10:15:21 +0100, Torsten Bronger wrote:
>
>>> And, as someone in this thread has pointed out, it is likely
>>> that your important modern (x86) processor is not natively
>>> executing your x86 code, and indeed meets your definition of
>>> having "in its typical implementation an interpreting layer
>>> necessary for typical hardware".
>> 
>> Only if you deliberately misunderstand me.
>
> If the words you choose to use have implications which you failed
> to realise before saying them, don't blame the reader for spotting
> those implications.

To me it sounds like "Some hardware is harder than other".

>>> Another example: is Java the bytecode, which is compiled from
>>> Java the language, interpreted or not? Even when the HotSpot JIT
>>> cuts in?
>> 
>> It is partly interpreted and partly compiled.  That's why it's
>> faster than Python.
>
> But Python is partly interpreted and partly compiled too

It's byte-compiled for a VM, that's not the same, and you know it.
Sorry but I think we've exchanged all arguments that are important.
Any further comment from me would be redundant, so I leave it.

> [...]
>
>> [...]  However, I think that it's fair to make a distiction
>> between compiled and interpreted languages because it may affect
>> one's decision for one or the other.  [...]
>
> Would you rather use a blindingly fast interpreted language, or a
> slow-as-continental drift compiled one?
>
> This isn't a rhetorical question. [example]
>
> I'm sure that's hardly the only example of a speedy interpreted
> language beating a glacial compiled one.

I agree that the distinction between interpreted and compiled
languages is not as clear as between positiv and negative numbers,
however, neither anybody has claimed that so far, nor it is
necessary.  It must be *practical*, i.e. a useful rule of thumb for
decision making.  If you really know all implications (pros and
cons) of interpreted languages, it's are very useful rule in my
opinion.

> [...]
>
> But seriously... why not tell them the truth? Python is slower
> than some other languages because optimization for execution speed
> has not been the primary focus of Python's development. If you
> tell them that Python is slow because it is interpreted, they will
> believe that Python will always be slow.

I don't think that "Python's developers don't focus primarily on
speed" sounds better than "Python is interpreted".  Both suggests
that you must circumvent problems with Python's execution speed (we
all know that this works and how) because you can't count on
language improvements.  Even worse, evading "interpreted" may sound
like an euphemism and as if you want to hide unloved implementation
features, depending on your audience.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus            ICQ 264-296-646


From brent.chambers at gmail.com  Sun Feb  5 16:01:23 2006
From: brent.chambers at gmail.com (brent.chambers at gmail.com)
Date: 5 Feb 2006 13:01:23 -0800
Subject: How to create a unix shell account with Python?
In-Reply-To: <mailman.1447.1139160877.27775.python-list@python.org>
References: <mailman.1447.1139160877.27775.python-list@python.org>
Message-ID: <1139172598.255665.241390@f14g2000cwb.googlegroups.com>

os.system("useradd ...")

Its not pretty, but it gets it done.



From aleaxit at yahoo.com  Mon Feb  6 23:38:06 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 6 Feb 2006 20:38:06 -0800
Subject: Detecting line endings
References: <1139236514.022464.319970@g14g2000cwa.googlegroups.com>
Message-ID: <1hacujo.1p81efw1ej38ioN%aleaxit@yahoo.com>

Fuzzyman <fuzzyman at gmail.com> wrote:

> Hello all,
> 
> I'm trying to detect line endings used in text files. I *might* be
> decoding the files into unicode first (which may be encoded using

Open the file with 'rU' mode, and check the file object's newline
attribute.

> My worry is that if '\n' *doesn't* signify a line break on the Mac,

It does, since a few years, since MacOSX is version of Unix to all
practical intents and purposes.


Alex


From adsheehan at eircom.net  Wed Feb 15 12:00:15 2006
From: adsheehan at eircom.net (adsheehan at eircom.net)
Date: 15 Feb 2006 09:00:15 -0800
Subject: Clarity: GIL, processes and CPUs etc
Message-ID: <1140022815.751692.313990@g47g2000cwa.googlegroups.com>

I have been reading many of the posting on the GIL and impact on
threading etc.
I have found is confusing and would welcome some clarity on this.

I understand that embedding the interpreter in a C/C++ application
limits it to one CPU.
If the application is multi-threaded (system threads) in will not use
additional CPUs as the interpreter is tied to one CPU courtesy of the
GIL.
True or False?

I understand that forking or running multiple process instances of the
above application would make use of multiple CPUs. This is because each
process would have its own interpreter and GIL that is independent of
any other process.
True or False?

Can anyone clarify the above?

Thanks
A



From n.estner at gmx.de  Fri Feb  3 06:59:10 2006
From: n.estner at gmx.de (n.estner at gmx.de)
Date: 3 Feb 2006 03:59:10 -0800
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<GrGdnYYzsbcBLH_eRVn-iQ@comcast.com>
	<mailman.1372.1138945618.27775.python-list@python.org>
Message-ID: <1138967950.697932.213160@g49g2000cwa.googlegroups.com>

> I still see "newbie-friendliness" as a
> MAJOR plus for Python -- it increases the chance that users
> of your software will become contributors.

Yes, I 100% agree to that point!
But the point is, the current situation is not newbie-friendly (I can
tell, I am a newbie): I declare a method with 3 parameters but when I
call it I only pass 2 parameters. That's confusing. If I declare a
member variable, I write: "self.x  = ValueForX", why can't I be equally
explicit for declaring member functions?



From jstroud at ucla.edu  Tue Feb 14 19:43:43 2006
From: jstroud at ucla.edu (James Stroud)
Date: Tue, 14 Feb 2006 16:43:43 -0800
Subject: Mac OS X - Deployment
In-Reply-To: <yEncExpress_Rulz!_www.techsono.com_3222798691@firstva.com>
References: <yEncExpress_Rulz!_www.techsono.com_3222798691@firstva.com>
Message-ID: <dsttfv$ot9$1@daisy.noc.ucla.edu>

Matt Trivisonno wrote:
> Hi Everybody,
> 
> I just spent about an hour googling and still can't find out how to deploy a 
> Python app to Mac OS X.
> 
> I just finished a simple Hello-World GUI app using wxPython and deployed it to 
> a WinXP system using PyInstaller. So I am familiar with the basic tools.
> 
> It would be great if I could build an OS X executable from my XP system. Is 
> that possible? If so, is it documented anywhere? 
> 
> If I can't do it on XP, I suppose I would have to install Python and wxPython 
> on a Mac, then copy over my HelloWorld.py file, but what then? I know how to 
> make DMG files, but what woudl go into the DMG?
> 
> I am used to REALbasic where you write your code and then push the "Build" 
> button and executables for Linux, Windows, and Mac are created in less than a 
> minute. Maybe the Python world will be as advanced one day...
> 
> Thanks,
> Matt
> 
> 
> 

py2app works for this. I'm not sure if it works from windows.


From paddy3118 at netscape.net  Mon Feb 13 15:50:24 2006
From: paddy3118 at netscape.net (Paddy)
Date: 13 Feb 2006 12:50:24 -0800
Subject: how do you pronounce 'tuple'?
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
Message-ID: <1139863824.940773.36310@f14g2000cwb.googlegroups.com>

Its tupple surely.

The following shows that we are not the first to ponder this:

http://www.jot.fm/issues/issue_2003_03/column9

Stick tuple into the Windosw XP speech properties preview box and hit
preview-voice,   
it says tupple not toople. :-)

- Paddy.



From john_zenger at yahoo.com  Thu Feb  9 07:27:10 2006
From: john_zenger at yahoo.com (John Zenger)
Date: Thu, 09 Feb 2006 07:27:10 -0500
Subject: removing characters before writing to file
In-Reply-To: <1139452501.421306.44080@f14g2000cwb.googlegroups.com>
References: <1139452501.421306.44080@f14g2000cwb.googlegroups.com>
Message-ID: <FbydnQT-nc-9qHbeRVn-uw@comcast.com>

As mentioned in the thread, it makes sense to build the desired output 
you want from the tuple, rather than converting the tuple to a string 
and then doing replace operations on the string.

If you do want to go the replace route, you don't need the power of 
regex substitutions for what you are interested in.  Just try the 
replace method:

 >>> foo = "('sometext1', 1421248118, 1, 'P ')"
 >>> foo.replace("\'", "").replace("(", "").replace(")", "")
'sometext1, 1421248118, 1, P '

or, more elegantly:

 >>> "".join([x for x in foo if x not in ['(',')','\''] ])
'sometext1, 1421248118, 1, P '

However, all of these replace-based solutions are bad because they will 
not only replace the apostrophes and parentheses between the strings, 
but also within them; what if "sometext1" is actually "John's Text?" 
You are much better off building your desired output from the actual 
tuple data yourself.

eight02645999 at yahoo.com wrote:
> hi
> i have some output that returns a lines of tuples eg
> 
> ('sometext1', 1421248118, 1, 'P ')
> ('sometext2', 1421248338, 2, 'S ')
> and so on
> ....
> 
> I tried this
> re.sub(r" '() ",'',str(output)) but it only get rid of the ' and not
> the braces. I need to write the output to a file such that
> 
> sometext1, 1421248118, 1, P
> sometext2, 1421248338, 2, S
> 
> I also tried escaping , re.sub(r" '\(\) ",'',str(output)) but also did
> not work
> How can i get rid of the braces before writing to file? thanks
> 


From agriff at tin.it  Tue Feb 21 02:15:21 2006
From: agriff at tin.it (Andrea Griffini)
Date: 20 Feb 2006 23:15:21 -0800
Subject: Multiple assignment and the expression on the right side
In-Reply-To: <1hb2v8p.stwgof10kmfz2N%aleaxit@yahoo.com>
References: <dte84b$568$1@home.itg.ti.com>
	<1hb2v8p.stwgof10kmfz2N%aleaxit@yahoo.com>
Message-ID: <1140506121.494089.98730@g44g2000cwa.googlegroups.com>

While I think that the paragraph is correct still there is IMO indeed
the (low) risk of such a misunderstanding. The problem is that "the
statement executes" can IMO easily be understood as "the statements
execute" (especially if your background includes only languages where
there's no multiple assignment) and the world "single" is also
frequently used in phrases like "every single time" where can indeed
denote a context of plurality.
Adding "just" or "only" would be IMO an great improvement by focusing
the attention on the key point, as it would be IMO better using
"rightmost" instead of "right-hand" (in this case even saving a char
;-) )

Just two foreign cents



From http  Mon Feb 27 07:04:54 2006
From: http (Paul Rubin)
Date: 27 Feb 2006 04:04:54 -0800
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>
	<4402AB7F.7070804@REMOVEMEcyber.com.au>
	<7xzmkdxkce.fsf@ruckus.brouhaha.com>
	<pan.2006.02.27.11.09.59.508427@REMOVETHIScyber.com.au>
Message-ID: <7x64n1vwgp.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVETHIScyber.com.au> writes:
> All of the machinery of the enum class created by Ben Finney is just to
> make sure that red, green and blue behave correctly, without extraneous
> string-like or number-like methods. Of course Ben could modify his code so
> that enum() returned an object. 

>From the PEP:

    >>> Weekdays = enum('sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat')
    ... 
    The values are bound to attributes of the new enumeration object::
    >>> today = Weekdays.mon

Looks to me like he already has enum returning an object and he
describes it as an "enumeration object".  The values are attributes on
the object.  An empty enum simply doesn't have any of those attributes.

> But to my mind, that would be like creating an empty integer. Not
> zero -- zero is a perfectly good integer.  An empty integer, one
> with no bits. Yes, you could create a wrapper class that did
> that. But why would you want to, and even if you did, in what sense
> is the result still an integer?

It's more like a set than an integer.  You can't iterate through an
integer, but according to the PEP, you can iterate through enums.

> Then you would be happy with empty longints that are distinct from zero?
> An empty enum() is like a bitless integer. 

No, I'd say enums are like types.  The integer 0 is different from 0.0
which is different from 0+0j and your program can tell them apart.
Similarly you can make e1, e2, and e3 be distinct empty enums.

> As far as I know, neither Pascal nor C allow empty enums. And even if they
> did, what and how would you use them for?

I don't use Pascal.  C formerly didn't allow zero-length arrays (I
don't know about now) and that was a design error; a GCC extension
fixes it.  Python doesn't make that error: it supports zero-length
arrays (empty lists).  If Python fixes C's error about empty arrays it
can also fix C's error about empty enums.

Anyway, Ben's enums already differ from C and Pascal enums in two ways:

1) they are first-class objects, not syntatic sugar
2) You can iterate through them.

That's enough to say their best semantics are probably different from
C's or Pascal's.

> Think about the Python usage:
> 
> >>> fruit = Enum('apple', 'banana', 'orange')
> >>> snack = fruit[2]

The PEP doesn't have Python enums working like that.  Have you
actually read it?


From wietse.j at gmail.com  Fri Feb 10 20:30:57 2006
From: wietse.j at gmail.com (wietse)
Date: 10 Feb 2006 17:30:57 -0800
Subject: equivalent functions?
Message-ID: <1139621457.141754.228880@f14g2000cwb.googlegroups.com>

Hello,

I'm reading "Text processing in Python" by David Mertz. In there he
defines a function

apply_each  = lambda fns, args=[]: map(apply, fns, [args]*len(fns))

I thought that this would be equivalent to:

apply_each = lambda fns, args=[]: [f(args) for f in fns]

Can anybody confirm this? If not, how are they different?
Thanks,
Wietse



From deets at nospam.web.de  Mon Feb  6 09:00:53 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 06 Feb 2006 15:00:53 +0100
Subject: Python and Flash
References: <1139230361.675896.241920@z14g2000cwz.googlegroups.com>
Message-ID: <44p34uF382pbU1@uni-berlin.de>

rodmc wrote:

> Can anyone provide me with advice on how easy (or otherwise) it is to
> drive a Flash animation (stored locally but displaed in a browser) with
> a Python application. Basically information is getting streamed to a
> Python client and this is expected to update the Flash animation.
> 
> It sounds odd, but it has to be done.

You can establish a communication over HTTP between the two. Under windows,
COM might be an option, too.

Diez


From steve at REMOVETHIScyber.com.au  Sat Feb 25 22:36:41 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sun, 26 Feb 2006 14:36:41 +1100
Subject: Is Python a Zen language?
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
Message-ID: <pan.2006.02.26.03.36.41.348874@REMOVETHIScyber.com.au>

On Sat, 25 Feb 2006 06:09:16 -0800, John Coleman wrote:

> Greetings,
>    I have a rough classification of languages into 2 classes: Zen
> languages and tool languages. A tool language is a language that is,
> well, a *tool* for programming a computer. C is the prototypical tool
> language. Most languages in the Algol family are tool languages. Visual
> Basic and Java are also tool languages. On the other hand, a Zen
> language is a language which is purported to transform your way of
> thinking about programming. Lisp, Scheme, Forth, Smalltalk and (maybe)
> C++ are Zen languages. Disciples acknowledge that it is difficult to
> pick up these languages but claim that, if you persevere, you sooner or
> later reach a state of computational satori in which it all makes
> sense. Interestingly enough, these languages often have books which
> approach scriptural status  e.g. SICP for Scheme.
> 
> So (assuming my classification makes sense)  which is Python?

Why can't it be both? Why do you think "Zen" and "tool" are two different
*kinds* of language, rather than just two extremes of a single continuum?

There are two kinds of people: those who divide the world into false
dichotomies, and those who don't. *wink*


> This is probably because I am not a programmer (I'm a mathematician who
> likes to program as a hobby and for numerical simulations) and so don't
> have the time to invest in picking up a Zen language. Hard-core hackers
> might presumably lean towards the Zen languages.

Regardless of whether Python is a Zen or tool language, or both, or
something else, it is incredibly easy to pick up. Just remember, and this
goes for *any* new language you are trying to learn, Python is not
C/Java/VB/Fortran/Lisp/Ada/whatever language you already know.



-- 
Steven.



From usenet-2004 at lithe.de  Wed Feb 15 19:43:29 2006
From: usenet-2004 at lithe.de (Jan Niklas Fingerle)
Date: 16 Feb 2006 00:43:29 GMT
Subject: multiple inheritance
References: <1140041977.692748.133570@g43g2000cwa.googlegroups.com>
	<1140043267.445069.218370@g43g2000cwa.googlegroups.com>
Message-ID: <43f3cab1$0$501$9b4e6d93@newsread4.arcor-online.net>

S?bastien Boisg?rault <Sebastien.Boisgerault at gmail.com> wrote:
> and search for the "cooperative methods and super" section
> in http://www.python.org/2.2/descrintro.html

..., then read http://fuhm.org/super-harmful/ (not the evangelism, just
the examples) and 
http://mail.python.org/pipermail/python-dev/2005-January/050656.html .

When done, ask yourself if you need cooperative method calling or just
calls to the superclasses' __init__-functions. It's your call then,
because we don't know your use cases.

Cheers, 
  -jnf


From bonono at gmail.com  Sat Feb 25 20:56:42 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 25 Feb 2006 17:56:42 -0800
Subject: Optimize flag question
In-Reply-To: <mailman.2441.1140904042.27775.python-list@python.org>
References: <400BDC416E2A0042AA35DF3919BB8A5115E14B@mail.mtl.proksim.com>
	<mailman.2441.1140904042.27775.python-list@python.org>
Message-ID: <1140919002.167092.53060@v46g2000cwv.googlegroups.com>


Steve Holden wrote:
> > Some other functions rely on the AssertionError exception to indicate to
> > the user that something went wrong instead of using a user defined
> > exception.
> >
>
> The real problem here is that you appear to be using AssertionError in
> an inappropriate way. If some caller passes an incorrect argument to
> your function, raise a ValueError. If you are passed the wrong type of
> data, raise a TypeError. And so on. Or, as you imply you thought about,
> raise a user-defined error.
>
> Generally speaking you should reserve assert for circumstances where you
> expect some invariant condition to be true. Otherwise use an "if"
> statement and raise some other exception if the condition is True.
>
What would be the occasion that AssertionError be the right exception
to raise then ?



From peter at engcorp.com  Thu Feb 23 08:56:47 2006
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 23 Feb 2006 08:56:47 -0500
Subject: Which is faster? (if not b in m) or (if m.count(b) > 0)
In-Reply-To: <1140616689.075536.272480@z14g2000cwz.googlegroups.com>
References: <mailman.1988.1140064009.27775.python-list@python.org>	<1140192708.160844.138890@g14g2000cwa.googlegroups.com>	<mailman.2067.1140205271.27775.python-list@python.org>
	<1140616689.075536.272480@z14g2000cwz.googlegroups.com>
Message-ID: <dtkeuq$mac$1@sea.gmane.org>

Farel wrote:
> Thank you, Peter!  Please understand, I was attempting to get more info
> on the WHY x is faster than y...  from those with more experience.
> Timer cannot give me that info.

Thanks for clarifying.  For future reference, it's traditional in 
English to use the word "why" in a question when you're asking WHY, 
rather than, say, phrasing the question like this:

Farel wrote:

 >> Tim, Are you saying that:
 >>      not (b in m)
 >> is faster than:
 >>     b not in m
 >> ????


-Peter



From LittlePython at lost.com  Thu Feb 16 21:59:40 2006
From: LittlePython at lost.com (LittlePython)
Date: Fri, 17 Feb 2006 02:59:40 GMT
Subject: Seaching Active Directory via ADO
References: <g_7Jf.33401$0H1.22606@trnddc04>
	<1140138661.484502.86380@f14g2000cwb.googlegroups.com>
	<56aJf.78250$_D1.4370@trnddc03>
	<1140142239_1425@sp6iad.superfeed.net>
	<UtaJf.78260$_D1.52493@trnddc03>
	<1140144965_1489@sp6iad.superfeed.net>
Message-ID: <w_aJf.18163$7C3.755@trnddc08>

Do you know what this may mean?

C:\Documents and Settings\Administrator\Desktop\pytest>ADOSeach.py
Traceback (most recent call last):
  File "C:\Documents and Settings\Administrator\Desktop\pytest\ADOSeach.py",
lin
e 6, in ?
    rs,rc=c.Execute("""
  File "<COMObject ADODB.Connection>", line 3, in Execute
  File "C:\Python24\Lib\site-packages\win32com\client\dynamic.py", line 258,
in
_ApplyTypes_
    result = self._oleobj_.InvokeTypes(*(dispid, LCID, wFlags, retType,
argTypes
) + args)
pywintypes.com_error: (-2147352567, 'Exception occurred.', (0, 'Provider',
'Tabl
e does not exist.', None, 1240640, -2147217865), None)

C:\Documents and Settings\Administrator\Desktop\pytest>
"Roger Upole" <rupole at hotmail.com> wrote in message
news:1140144965_1489 at sp6iad.superfeed.net...
> You could also accomplish the same thing using the
> Command object, but this way is usually more concise
> for plain Sql.
>
>          Roger
>
> "LittlePython" <LittlePython at lost.com> wrote in message
> news:UtaJf.78260$_D1.52493 at trnddc03...
> > I notice there is no adodb.command. This is not required?
> > Thx for the example!
> > "Roger Upole" <rupole at hotmail.com> wrote in message
> > news:1140142239_1425 at sp6iad.superfeed.net...
> > > Here's a short example that uses ADO to search for a
> > > user by wildcard.
> > >
> > > import win32com.client
> > > c = win32com.client.Dispatch("ADODB.Connection")
> > > c.Open("Provider=ADSDSOObject")
> > >
> > > rs,rc=c.Execute("""
> > > SELECT adspath, title, name
> > > From 'LDAP://DC=yourdomain, DC=COM'
> > > where objectClass='user' and name='Roger*'
> > > """)
> > >
> > > while not rs.EOF:
> > >     for f in rs.Fields:
> > >         print f.Name, f.Value
> > >     rs.MoveNext()
> > >
> > >     hth
> > >           Roger
> > >
> > > "LittlePython" <LittlePython at lost.com> wrote in message
> > > news:56aJf.78250$_D1.4370 at trnddc03...
> > > > Thanks but I was looking more for ADO com object than ADSI or ldap.
> > > > For some strange reason it is very hard to locate any working
scripts
> > that
> > > > use ADO  to connect and search AD. Is there an issue with ADO and
> python
> > > > when connecting to AD?
> > > > I have try to build one myself with no luck. I think my problem is
> with
> > > > adodb.command calls.
> > > >
> > > > Thanks for your response.
> > > >
> > > > "alex23" <wuwei23 at gmail.com> wrote in message
> > > > news:1140138661.484502.86380 at f14g2000cwb.googlegroups.com...
> > > > > Heya,
> > > > >
> > > > > There are a couple of examples on the O'Reilly site. These two are
> > > > > taken from 'Active Directory Cookbook', the first uses a COM
object
> > > > > while the second uses a native LDAP module:
> > > > >
> > > > >
> > > >
> > >
> >
>
http://www.rallenhome.com/books/adcookbook/src/18.6-rootdse_python_com.py.tx
> > > > t
> > > > >
> > > >
> > >
> >
>
http://www.rallenhome.com/books/adcookbook/src/18.6-rootdse_python_ldap.py.t
> > > > xt
> > > > >
> > > > > This might give you a start.
> > > > >
> > > > > - alex23
> > > > >
> > > >
> > > >
> > >
> > >
> > >
> > > ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet
> > News==----
> > > http://www.newsfeeds.com The #1 Newsgroup Service in the World!
120,000+
> > Newsgroups
> > > ----= East and West-Coast Server Farms - Total Privacy via Encryption
> > =----
> >
> >
>
>
>
> ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet
News==----
> http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+
Newsgroups
> ----= East and West-Coast Server Farms - Total Privacy via Encryption
=----




From aleaxit at yahoo.com  Sun Feb 19 18:24:02 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 19 Feb 2006 15:24:02 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
Message-ID: <1hb0ib8.w3r86kfbzvkuN%aleaxit@yahoo.com>

Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote:

> DH a ?crit :
> (snip)
> > 
> > It is by design. Python is dynamically typed.  It is essentially an
> > interpreted scripting language like javascript or ruby or perl,
> 
> It's not a "scripting" language, and it's not interpreted.

OK, but then we should change <http://python.org/doc/Summary.html>,
which starts with "Python is an interpreted, interactive,
object-oriented programming language." -- if "it's not interpreted",
then why is this crucial page on Python's main site lying outright?


Alex


From khaccountant at yahoo.com  Thu Feb  9 16:19:09 2006
From: khaccountant at yahoo.com (khaccountant at yahoo.com)
Date: 9 Feb 2006 13:19:09 -0800
Subject: Mental Abuse
Message-ID: <1139519949.266435.18420@o13g2000cwo.googlegroups.com>

My abuser has been using the medical device to harass me the last 4-5
years. I have no idea what type of a device is being used on me. I
believe the device is only available to licensed pharmacist(s). I am
not very familiar with the intend usage of the device. As I understand,
the device can be used as a stimulator; 24 hours therapeutic session;
ease off a lot of emotion--anger, sadness, fear...ect.; enhance
recovery of mental illnesses. If abuse is the intention, it can be used
to sense what the other person's thinking or as a form of communication
through inner voices. In my case, the abuser has been using it to
insult me in every way he could possible think of. As I know, a single
device is only effective if you are in the same city. Mulitple devices
can reach billion of people world wide.  Fear of being evaluate as
mental ill due to lack of physical evidence. I am hoping to find out
more about the device, before reporting to the police. If anyone know
what type of a device has been using on me. Who manufacture such a
device. What can I do to stop the abuser from such criminal act? Please
email me at khaccountant at yahoo.com, I would greatly appreciated.



From rganesan at myrealbox.com  Mon Feb 13 06:24:33 2006
From: rganesan at myrealbox.com (Ganesan Rajagopal)
Date: Mon, 13 Feb 2006 16:54:33 +0530
Subject: About undisclosed recipient
References: <20060211151513.76943.qmail@web37602.mail.mud.yahoo.com>
Message-ID: <xkvh3binlcwe.fsf@grajagop-lnx.cisco.com>

>>>>> Liyana Robert <liyana_robert at yahoo.com> writes:

> Pls help me to know About undisclosed recipient.
> How we can sent mails to other like this.

Use Bcc header instead of To or Cc.

Ganesan

-- 
Ganesan Rajagopal





From paul at boddie.org.uk  Wed Feb 22 09:05:20 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 22 Feb 2006 06:05:20 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com> <43fbc788@usenet01.boi.hp.com>
	<87u0ar3gba.fsf@wilson.homeunix.com>
	<pan.2006.02.22.11.35.14.90948@REMOVETHIScyber.com.au>
	<1140612537.685150.68330@o13g2000cwo.googlegroups.com>
	<7xu0arbkwd.fsf@ruckus.brouhaha.com>
	<1140614911.243300.67200@g47g2000cwa.googlegroups.com>
Message-ID: <1140617119.964479.200780@g44g2000cwa.googlegroups.com>

Kay Schluehr wrote:
> Paul Rubin wrote:
> > "Kay Schluehr" <kay.schluehr at gmx.net> writes:
> > > I talked to Richard Emslie recently and he told me that the PyPy team
> > > works on a mechanism to create CPython-extension modules written in
> > > RPython i.e. a statically translateable subset of Python.
> >
> > Sounds great but is that a whole lot different from pyrex?

I've wondered that as well.

> RPython is Python code not a different language. In a sense RPython
> consists of a set of rules usual Python has to conform to make complete
> type-inference feasible. Here is an overview of those rules.
>
> http://codespeak.net/pypy/dist/pypy/doc/coding-guide.html#restricted-python

But does that make it "proper Python"? Having, for example, only one
type associated with a name (they use the term "variable", though) at
any given time makes it more like various statically typed or
functional languages, although I can fully understand why you'd want
this restriction.

Paul



From seb.haase at gmail.com  Mon Feb 13 00:45:19 2006
From: seb.haase at gmail.com (seb.haase at gmail.com)
Date: 12 Feb 2006 21:45:19 -0800
Subject: how to create a movie ?
Message-ID: <1139809519.851301.19930@g44g2000cwa.googlegroups.com>

Hi,
I have a series of images (either from numarray or from PIL)
After googling if read something about pyMedia...

Can I create an AVI movie from my images with that ? How about
quicktime ? 

Thanks,
Sebastian Haase



From me at privacy.net  Fri Feb 17 07:02:40 2006
From: me at privacy.net (Charles)
Date: Fri, 17 Feb 2006 09:02:40 -0300
Subject: mod_python and open HTTP connection
References: <op.s421hyqcix6gqv@charles>
	<1140136513.433942.61470@g43g2000cwa.googlegroups.com>
Message-ID: <op.s4382qj9ix6gqv@charles>

On Thu, 16 Feb 2006 21:35:13 -0300, Kane <jason.w.kane at gmail.com> wrote:

> btw, 'ping' as written above is horrible.  If a code review turned
> _that_ up on production someone would be fired, along with whoever
> hired them, whoever ate lunch with them and anyone that waves goodbye.

Really? Wow... Gotta be carefull from now on...


-- 
Charles.

Desenvolvimento e cria??o de sites: www.auriance.com
Hospedagem de sites e servidores dedicados: www.auriance.net


From http  Thu Feb 23 21:36:23 2006
From: http (Paul Rubin)
Date: 23 Feb 2006 18:36:23 -0800
Subject: Pickling/unpickling Cookie.SimpleCookie fails with protocol=2
References: <87acchv6cr.fsf@andreasen.org>
Message-ID: <7x8xs1sct4.fsf@ruckus.brouhaha.com>

"Erwin S. Andreasen" <erwin+usenet at andreasen.org> writes:
> Pickling a Cookie.SimpleCookie (or SmartCookie) when using protocol=2
> seems to do something very strange. Protocol 0/1 work fine:

Don't use SmartCookies because of the security issue.  See the docs.


From haraldarminmassa at gmail.com  Mon Feb 20 02:25:39 2006
From: haraldarminmassa at gmail.com (Harald Armin  Massa)
Date: 19 Feb 2006 23:25:39 -0800
Subject: Python vs. Lisp -- please explain
In-Reply-To: <1hb0ib8.w3r86kfbzvkuN%aleaxit@yahoo.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<1hb0ib8.w3r86kfbzvkuN%aleaxit@yahoo.com>
Message-ID: <1140420339.889629.319920@g44g2000cwa.googlegroups.com>

>>OK, but then we should change <http://python.org/doc/Summary.html>,
>>which starts with "Python is an interpreted, interactive,
>>object-oriented programming language."

I second this motion. Even tried to persuade the site maintainer
before. We should really, really change it. The perceived speed of
Python will at least triple on dropping that "interpreted" - and I am
NOT joking.

Harald



From fredrik at pythonware.com  Wed Feb  1 03:22:11 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 1 Feb 2006 09:22:11 +0100
Subject: HTML parsing bug?
References: <1138632328.306349.241430@g44g2000cwa.googlegroups.com>
Message-ID: <drpr3m$ivn$1@sea.gmane.org>

g_no_mail_please at yahoo.com wrote:

> Python 2.3.5 seems to choke when trying to parse html files, because it
> doesn't realize that what's inside <!--      --> is a comment in HTML,
> even if this comment is inside <script> </script>, especially if it's a
> comment inside that script code too.

nope.  what's inside <!-- --> is not a comment if it's inside a <script>
or <style> tag.  read the spec:

    http://www.w3.org/TR/REC-html40/types.html#type-cdata

    "Although the STYLE and SCRIPT elements use CDATA for their data
    model, for these elements, CDATA must be handled differently by
    user agents. Markup and entities must be treated as raw text and
    passed to the application as is. The first occurrence of the
    character sequence "</" (end-tag open delimiter) is treated as
    terminating the end of the element's content. In valid documents,
    this would be the end tag for the element."

in your case, the first occurrence of "</" is not the end tag.

you can disable proper parsing by setting the CDATA_CONTENT_ELEMENTS
attribute on the parser instance, before you start parsing.  by default, it is
set to

    CDATA_CONTENT_ELEMENTS = ("script", "style")

setting it to an empty tuple disables HTML-compliant handling for these
elements:

    p = HTMLParser()
    p.CDATA_CONTENT_ELEMENTS = ()
    p.feed(f.read())

</F>





From port001 at gentoo.org  Fri Feb 17 13:56:29 2006
From: port001 at gentoo.org (Ian Leitch)
Date: Fri, 17 Feb 2006 18:56:29 +0000
Subject: Terminating a function
In-Reply-To: <43F5BD9B.7040705@al.com.au>
References: <mailman.2045.1140174459.27775.python-list@python.org>	<45ls4mF7ch23U1@uni-berlin.de>
	<43F5BD9B.7040705@al.com.au>
Message-ID: <43F61C5D.2030305@gentoo.org>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Astan Chee wrote:
> I was thinking of threads but I just simply want to terminate a (global)
> function after it has been running for more than 5 minutes regardless of
> state.
> I was assuming I needed threads because it can calculate time elapsed
> (that and im rather inexperienced with threads)
> Thanks again for your help!

You can use a thread to do the timing and send an interrupt when the
time is up:

#!/usr/bin/python

import thread
import threading
from time import sleep

def timer_thread():

    sleep(10)
    thread.interrupt_main()

def my_func():

    try:

        while 1:

            sleep(2)
            print "Hello"

    except KeyboardInterrupt:

        return

my_thread = threading.Thread(target=timer_thread)
my_thread.start()

my_func()

print "Done."
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.1 (GNU/Linux)

iD8DBQFD9hxcefZ4eWAXRGIRAnwIAKCH/pH7dyzjk1rsfvFKzrA48GgeEACfdNx6
QmsqAruOESUe2bzPTh/nsE8=
=LvT6
-----END PGP SIGNATURE-----


From http  Mon Feb 13 16:13:51 2006
From: http (Paul Rubin)
Date: 13 Feb 2006 13:13:51 -0800
Subject: hard disk activity
References: <1139850420.902979.71620@o13g2000cwo.googlegroups.com>
	<g9i1v1lbf2rhmgskmkh5f9mt73s67umckk@4ax.com>
	<1139857505.376840.37440@g43g2000cwa.googlegroups.com>
	<1139859890.407497.124870@o13g2000cwo.googlegroups.com>
	<1139863885.755813.324450@g47g2000cwa.googlegroups.com>
	<7xfymn0yda.fsf@ruckus.brouhaha.com>
	<1139864840.300396.170070@o13g2000cwo.googlegroups.com>
Message-ID: <7xbqxb0xo0.fsf@ruckus.brouhaha.com>

"VSmirk" <vania.smirk at gmail.com> writes:
> Aweseme!!!  I got as far as segmenting the large file on my own, and I
> ran out of ideas.  I kind of thought about checksum, but I never put
> the two together.
> 
> Thanks.  You've helped a lot....

The checksum method I described works ok if bytes change in the middle
of the file but don't get inserted (piecs of the file don't move
around).  If you insert on byte in the middle of a 1GB file (so it
becomes 1GB+1 byte) then all the checksums after the middle block
change, which is no good for your purpose.

Rsync is a very clever program.  Rather than re-implement its
algorithm maybe you should just install it and use it, either directly
(instead of writing a Python program) or under control of a Python
program, using os.system or the subprocess module.


From u.hobelmann at web.de  Tue Feb 14 04:40:41 2006
From: u.hobelmann at web.de (Ulrich Hobelmann)
Date: Tue, 14 Feb 2006 10:40:41 +0100
Subject: Xah's Edu Corner: accountability & lying thru the teeth
In-Reply-To: <1139909629.798938.284160@g47g2000cwa.googlegroups.com>
References: <1133844932.007824.26780@g43g2000cwa.googlegroups.com>
	<1134780763.066592.45390@g49g2000cwa.googlegroups.com>
	<1135405908.381150.133190@o13g2000cwo.googlegroups.com>
	<1136236586.734775.212440@f14g2000cwb.googlegroups.com>
	<1137784561.589887.58380@o13g2000cwo.googlegroups.com>
	<1139909629.798938.284160@g47g2000cwa.googlegroups.com>
Message-ID: <45dmspF66tepU1@individual.net>

Xah Lee wrote:
> here's a site: http://www.longbets.org/bets that takes socially
> important predictions. I might have to enter one or two.
> 
> i longed for such a accountable predictions for a long time. Usually,
> some fucking fart will do predictions, but the problem is that it's not
[...]

OMG, he's back.

I predict, Xah will haunt us for years to come.

-- 
Suffering from Gates-induced brain leakage...


From rlight2 at gmail.com  Wed Feb 22 19:01:38 2006
From: rlight2 at gmail.com (Ross)
Date: 22 Feb 2006 16:01:38 -0800
Subject: Cross-Platform Bonjour Module
Message-ID: <1140652897.395005.244170@z14g2000cwz.googlegroups.com>

Can anybody point me to a Python module for using the mDNSResponder
stuff (http://developer.apple.com/networking/bonjour)?  Thanks!



From lycka at carmen.se  Thu Feb  9 14:24:22 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 09 Feb 2006 20:24:22 +0100
Subject: New editions of several Python books.
In-Reply-To: <dsg446$g6f$1@panix3.panix.com>
References: <dsfplv$ptp$1@wake.carmen.se> <dsg446$g6f$1@panix3.panix.com>
Message-ID: <dsg4t8$lhi$1@wake.carmen.se>

Aahz wrote:
> If you can have _Borland C++ for Dummies_, _Python for Dummies_ makes a
> lot more sense.  :-/

Well, I guess Borland C++ for Dummies has a genuine purpose, but
it could be a very short book. One page where is says: "Don't!" ;^)

I guess it's a seal of mainstream approval to get a Dummies book,
and I certainly think that Python should be a relief for many
people who aren't programmers but occasionally needs to write
small programs. I hope it becomes a hit! I suspect the "dummies"
might want a more "polished" (dumbed down?) development environment
though.


From lycka at carmen.se  Thu Feb  9 14:42:57 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 09 Feb 2006 20:42:57 +0100
Subject: Pulling all n-sized combinations from a list
In-Reply-To: <1139513265.440321.184530@o13g2000cwo.googlegroups.com>
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>
	<1139509392.890581.94470@g43g2000cwa.googlegroups.com>
	<mailman.1675.1139510184.27775.python-list@python.org>
	<1139513265.440321.184530@o13g2000cwo.googlegroups.com>
Message-ID: <dsg601$ndh$1@wake.carmen.se>

mensanator at aol.com wrote:
> Fredrik Lundh wrote:
>>Windows don't support C ?  that was a new one.
> 
> 
> Windows comes with a C compiler? That's news to me.

It doesn't come with Python either. Both Python and
the compiler etc that you need can be freely downloaded
from the internet. I suggest you leave the witty
sarcasms to effbot. He might be a little annoying at
times, but he know what he's talking about.



From erniedude at gmail.com  Thu Feb  2 17:13:16 2006
From: erniedude at gmail.com (Ernesto)
Date: 2 Feb 2006 14:13:16 -0800
Subject: Windows - create text file - (newb)
In-Reply-To: <43E28130.3040908@websafe.com>
References: <1138916451.293717.283320@g44g2000cwa.googlegroups.com>
	<43E28130.3040908@websafe.com>
Message-ID: <1138918396.693893.92050@g44g2000cwa.googlegroups.com>

got it .  thanks tons.  i'm doing the tutorial now.



From bignose+hates-spam at benfinney.id.au  Mon Feb 27 20:16:17 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 28 Feb 2006 12:16:17 +1100
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<QNwMf.9926$PR2.201584@twister2.libero.it>
Message-ID: <87fym4xoym.fsf@rose.polar.local>

"Giovanni Bajo" <noway at sorry.com> writes:
> Ben Finney wrote:
>> Values within an enumeration cannot be meaningfully compared except
>> with values from the same enumeration.  The comparison operation
>> functions return ``NotImplemented`` [#CMP-NOTIMPLEMENTED]_ when a
>> value from an enumeration is compared against any value not from the
>> same enumeration or of a different type::
>> [...]
>> This allows the operation to succeed, evaluating to a boolean value::
>
> Given that this is going to change in Python 3.0 for builtin types,
> I'm not sure there's much reason to keep it this way.

What is it that will change? Can you point to something we should read
about this?

> I'd rather a comparison operation between different enum types to
> raise an exception. This would be a very compelling feature to use
> enum (and in fact, the implementation I chose in Cookbook for my
> programs have this feature).

A previous implementation raised exceptions from failed comparisons.
Here is the discussion that convinced me that was not the right thing
to do::

    <URL:http://groups.google.com/group/comp.lang.python/browse_thread/thread/140de1765bbb8d2d/>

>> Coercing a value from an enumeration to a ``str`` results in the
>> string that was specified for that value when constructing the
>> enumeration::
>>
>>     >>> gym_night = Weekdays.wed
>>     >>> str(gym_night)
>>     'wed'
>
> What's the repr of an enumeration value?

Hmm, the PEP doesn't specify. I was leaving it up to the
implementation.

> OTOH, it should be something like "Weekdays.wed", so that
> eval(repr()) holds true. Also, it'd be very useful in debug dumps,
> tracebacks and whatnot.

An enumeration value object knows the enumeration object that created
it, but that enumeration doesn't know its own name; objects don't know
their own name, since they could have many, or none.

Even if an enumeration value were to know the name of the enumeration
that created it, you still have this problem::

    >>> Colours = enum('red', 'green', 'blue')
    >>> repr(Colours.green)
    Colours.green
    >>> Lamps = Colours
    >>> repr(Lamps.red)
    Colours.red

Is this desirable behaviour? I don't think so.

-- 
 \        "I went to the hardware store and bought some used paint. It |
  `\                   was in the shape of a house."  -- Steven Wright |
_o__)                                                                  |
Ben Finney


From flashkNO at SPAMgmail.com  Wed Feb 15 22:50:04 2006
From: flashkNO at SPAMgmail.com (Farshid Lashkari)
Date: Wed, 15 Feb 2006 19:50:04 -0800
Subject: Is empty string cached?
In-Reply-To: <mailman.1982.1140061103.27775.python-list@python.org>
References: <cUMIf.11894$MJ.4803@fed1read07>	<mailman.1981.1140057796.27775.python-list@python.org>	<tgSIf.12036$MJ.8017@fed1read07>
	<mailman.1982.1140061103.27775.python-list@python.org>
Message-ID: <WCSIf.12038$MJ.252@fed1read07>

> I really don't understand why it's so important: it's not a part of the 
> language definition at all, and therefore whatever behavior you see is 
> simply an artifact of the implementation you observe.

I guess I should rephrase my question in the form of an example. Should 
I assume that a new string object is created in each iteration of the 
following loop?

for x in xrange(1000000):
     func(x,'some string')

Or would it be better to do the following?

stringVal = 'some string'
for x in xrange(1000000):
     func(x,stringVal)

Or, like you stated, is it not important at all?

Thanks,
Farshid


From michael at stroeder.com  Tue Feb  7 02:25:41 2006
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Tue, 07 Feb 2006 08:25:41 +0100
Subject: Webmail with Python
In-Reply-To: <7x3biws18a.fsf@ruckus.brouhaha.com>
References: <pan.2006.02.04.20.02.29.212441@thomas-guettler.de>
	<43E726B5.5020109@mxm.dk>
	<pan.2006.02.06.15.38.01.245423@thomas-guettler.de>
	<7x3biws18a.fsf@ruckus.brouhaha.com>
Message-ID: <lkulb3-ajg.ln1@nb2.stroeder.com>

Paul Rubin wrote:
> Thomas Guettler <niemand.leermann at thomas-guettler.de> writes:
> 
>>Yes, Zope or Plone are to heavyweight for this. I will use squirrelmail,
>>I think it stable. I hope that I don't need to touch the PHP code.
> 
> Be careful, Squirrelmail had some annoying privacy bugs which the
> maintainers (as of the last time I messed with squirrelmail, a year or
> two ago) refused to acknowledge.

This prevented me from using Squirrelmail. Currently I'm using hastymail
also written in PHP. It claims to be secure but it has not so many features.

I'd like to see a rather simple Python webmail app. (without client-side
Javascript!)

Ciao, Michael.


From rtilley at vt.edu  Mon Feb 13 15:23:38 2006
From: rtilley at vt.edu (rtilley)
Date: Mon, 13 Feb 2006 15:23:38 -0500
Subject: readlines and break apart based on letters
Message-ID: <dsqpsb$lhb$1@solaris.cc.vt.edu>

Hi,

While trying to better understand security descriptors on Windows. I've 
been examining text-based security descriptors. I have the security 
descriptors on individual lines stored in a text file. I want to break 
these lines apart based on owner, group, dacl and sacl. These areas are 
demarcated by O: G: D: and S:

There are no spaces in the lines. How can I read each line so that each 
area is broken out? I'd like output like this:

O: details
G: details or NONE
D: details or NONE
S: details or NONE

Here is an example SD:
O:owner_sidG:group_sidD:dacl_flags(string_ace1)(string_ace2)...(string_acen)S:sacl_flags(string_ace1)(string_ace2)...(string_acen)

I want to read this and break it apart like this:
O:owner_sid
G:group_sid
D:dacl_flags(string_ace1)(string_ace2)...(string_acen)
S:sacl_flags(string_ace1)(string_ace2)...(string_acen)

Any tips?
Brad



From jeff at schwabcenter.com  Wed Feb 22 09:07:18 2006
From: jeff at schwabcenter.com (Jeffrey Schwab)
Date: Wed, 22 Feb 2006 14:07:18 GMT
Subject: That's really high-level: bits of beautiful python
In-Reply-To: <ZpSdnRUPhtMP-WbenZ2dnUVZ_sSdnZ2d@is.co.za>
References: <ZpSdnRUPhtMP-WbenZ2dnUVZ_sSdnZ2d@is.co.za>
Message-ID: <qe_Kf.17237$915.1356@southeast.rr.com>

Max wrote:
> I have a friend who has been programming in C for many years, and he is 
> a great fan of the language. However, he (and I) are about to start a 
> python course, and he has been asking me a lot of questions. He often 
> responds to my answers with "Urgh! Object-orientation!" and suchlike.

After "many years" of C programming, he's still wary of object orientation?

> But today we were discussing the problem of running externally-provided 
> code (e.g. add-on modules). Neither of us knew how to do it in C, though 
> I suggested using DLLs.

It depends on how the module was provided, and on the platform and tool 
chain being used to build the code.  It's typically not too hard on a 
given platform, once you get used to it, but there's certainly no single 
correct answer.

> However, I quickly installed python on his 
> laptop and coded this:
> 
> exec "import %s as ext_mod" % raw_input("Module: ")
> ext_mod.do()

exec'ing raw_input'd code gives me the willies.

> And created to sample modules with do() functions to demonstrate. He was 
> impressed ("That's really high-level" were his words).

It is cool, isn't it?  :)

> I was just thinking perhaps we should create some kind of collection of 
> bits of "impressive" code like this.

Do you mean something like the ASPN Cookbooks?

	http://aspn.activestate.com/ASPN/Cookbook/

If you keep track of some examples of "cool" stuff, I'll format them and 
get some web space to post them.  Try to give credit for each example.

> He also liked 99 Bottles in one line:
> 
> print '\n'.join(["%d bottles of beer on the wall." % i for i in 
> range(100,0,-1)])

A little shorter:

for i in range(99, 0, -1): print("%d bottles of beer on the wall." % i)


From nomejl at blentronix.com  Thu Feb 16 07:12:35 2006
From: nomejl at blentronix.com (Mile Blenton)
Date: Thu, 16 Feb 2006 13:12:35 +0100
Subject: Extend/embedd python problem?
Message-ID: <dt1pv4$js1$1@ss405.t-com.hr>


Hello all,

I am considering python as a 'scripting' language to be used
in my application where users must be able to write their own 
code to access application data, use the application mechanisms
to gather various data and basicly must be able to control the 
application itself.

Currently, to accomplish this task, my app uses my custom C-like 
language and my bytecode interpreter. In this case I am able to 
control the execution of a single 'instruction' in my interpreter
and interpret the user code when I want. It also enables me to support 
multiple 'user tasks' (not a system LWP-like tasks, but a higher-level
concurrent execution simulation - each task has it's own interpreter 
and each interpreter is executed every n-th iteration for example). 

I have glanced at the python/C api ref manual and know I can
use the 'PyRun_InteractiveOne' to execute a single python 
statement, but am not sure if there's a way to 'precompile'
python code and prepare it for execution so I can interpret
the precompiled statements one-by-one, similarly to my custom
interpreter.

I noticed the 'Py_CompileString' but am not sure what to do and 
how to interact with 'PyObject*' it returns me - how do I run it, 
can I interrupt it when it's executing, can I run it on 
per-statement basis'?

Any help or pointers where to look for answers to my questions is
grately apreciated.

Thanks,
Regards,
  Mario




From ericoneal at gmail.com  Fri Feb 24 11:31:06 2006
From: ericoneal at gmail.com (ericoneal at gmail.com)
Date: 24 Feb 2006 08:31:06 -0800
Subject: groupwise send mail
Message-ID: <1140798666.437204.81440@z34g2000cwc.googlegroups.com>

Can someone give me an idea as to why this is not working?  The
Recipients.Add line doesnt cause an error, but my recipients arent
being used.  The email never gets sent because there is no recipeients.

Thanks,
Eric


import win32com.client
gwApp = win32com.client.Dispatch('NovellGroupWareSession')
acct1 = gwApp.Login("NDS:\\Tree_Name","user.context", "")
oMail = acct1.MailBox.Messages.Add ("GW.Message.Mail", "Draft")
oMail.fromtext = "Python Hazmat Script"
oMail.Recipients.Add("doodie at example.com")
oMail.Subject.PlainText = "Script error"
oMail.BodyText.PlainText = "The Python Hazmat script failed"
oMail.send
gwApp.quit



From mtobis at gmail.com  Sat Feb 11 19:56:54 2006
From: mtobis at gmail.com (Michael Tobis)
Date: 11 Feb 2006 16:56:54 -0800
Subject: Is python very slow compared to C
In-Reply-To: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
Message-ID: <1139705814.165447.80880@f14g2000cwb.googlegroups.com>

Experienced programmers learning Python should read this:

http://effbot.org/zone/python-objects.htm

Try to understand the advantages of this approach, and understand its
costs.

Essentially, everything you do in Python (or related languages)
involves resolving a name. Sometimes the number of dictionary look-ups
(name dereferences) required to do anything is very expensive in
runtime performance.

If your code is not compute-bound (as most codes are not; these days
communication-bound or limited by database performance are more common)
the increase in your own performance will be much more important. If
your code does do so much computing (as mine do) that performance
matters, you may still find Python useful, but it is less of a
slam-dunk.

mt



From rgacote at AppropriateSolutions.com  Mon Feb 27 17:06:59 2006
From: rgacote at AppropriateSolutions.com (Ray Cote)
Date: Mon, 27 Feb 2006 17:06:59 -0500
Subject: Firebird and Python
In-Reply-To: <dtv83h$t52$1@wake.carmen.se>
References: <1140716394.225560.27920@t39g2000cwt.googlegroups.com>
	<mailman.2364.1140721473.27775.python-list@python.org>
	<1140727082.800917.44550@i40g2000cwc.googlegroups.com>
	<dtmk8t$an9$1@wake.carmen.se>
	<mailman.2392.1140782962.27775.python-list@python.org>
	<dtni65$dnv$1@wake.carmen.se> <dtno33$qbk$1@nemesis.news.tpi.pl>
	<dtv83h$t52$1@wake.carmen.se>
Message-ID: <a06210232c0292824f920@[192.168.24.239]>

At 5:07 PM +0100 2/27/06, Magnus Lycka wrote:
><SNIP>
>  I'm still interested
>in experiences from Pythonistas using Firebird--
>especially embedded.

Works great.
Python and Firebird embedded (at least on Windows) is very simple to use.
Not currently using it on other platforms.
--Ray

-- 

Raymond Cote
Appropriate Solutions, Inc.
PO Box 458 ~ Peterborough, NH 03458-0458
Phone: 603.924.6079 ~ Fax: 603.924.8668
rgacote(at)AppropriateSolutions.com
www.AppropriateSolutions.com


From jeff at taupro.com  Sun Feb  5 05:53:48 2006
From: jeff at taupro.com (Jeff Rush)
Date: Sun, 05 Feb 2006 04:53:48 -0600
Subject: New Mailing List for PyCon Technology and Conference Software
Message-ID: <43E5D93C.2060703@taupro.com>

I have arranged for the creation of a new mailing list under python.org for 
the discussion of software development for PyCon, of any type and for any 
year.  We've been sending a lot of email privately and making the process 
more visible would be good I think.  There are a few disjoint efforts and a 
list would bring them together.

This list is also for the discussion of other technical matters related to 
PyCon such as the audio/video recording efforts.

This list can also help us prepare for the conference-software sprint that 
Andrew Kuching is pushing for PyCon this year.

Please consider signing up by visiting:

   http://mail.python.org/mailman/listinfo/pycon-tech

-Jeff



From steve at holdenweb.com  Thu Feb 16 23:36:55 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 16 Feb 2006 23:36:55 -0500
Subject: Some general questions about using "stdin","stdout"....
In-Reply-To: <BAY12-F6AC755B93367DBFB14F3CE8FB0@phx.gbl>
References: <BAY12-F8EAB7B87DF62D425E9EC5E8FB0@phx.gbl>
	<BAY12-F6AC755B93367DBFB14F3CE8FB0@phx.gbl>
Message-ID: <dt3jt2$j4k$1@sea.gmane.org>

asdsd sir wrote:
> thank you very much for your help...
> my big mistake,was to believe that "|" is the pipe symbol for both,unix and 
> python...
> it is really annoying,how such a simple thing can mess things
> 
> Thank you for clearing this out.
> 
It is indeed annoying when assumptions we carry from one environment 
turn out to be untrue for another. I can almost hear the unspoken 
thought ("But Perl is similar to shell scripting in this way, so why 
aren't other languages?") - though I may be doing you a disservice 
assuming that you know anything about Perl.

You will find as your programming experience increases that the 
different languages you learn are appropriate for different purposes, 
and have different advantages and disadvantages. Python excels at 
expressing algorithms in an unambiguous and easily-readable way. It's 
worth taking the time to learn it, and you are clearly already on your way.

I look forward to reading your next question. Welcome to comp.lang.python.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From steve at REMOVEMEcyber.com.au  Mon Feb 20 03:15:36 2006
From: steve at REMOVEMEcyber.com.au (Steven D'Aprano)
Date: Mon, 20 Feb 2006 19:15:36 +1100
Subject: number ranges (was Re: Matlab page on scipy wiki)
References: <e86a5fd00602131854s73191cbbu742d4434ad074908@mail.gmail.com>
	<1139945386.3346.38.camel@pc1.cole.uklinux.net>
	<43F8D881.5030804@sympatico.ca>
	<gfmdnZrrLeHK22TenZ2dnUVZ_tCdnZ2d@comcast.com>
Message-ID: <43F97AA8.50005@REMOVEMEcyber.com.au>

John Zenger wrote:

> I strongly agree that Python should promote range or xrange to syntax. I 
> favor [0..10] rather than [0:10] because 0..10 is inherently easier to 
> understand.

"Inherently"?

You mean people are born with an instinctive, unlearnt 
understanding of ..? Or that our brains are constructed 
in such a way that .. is easier to understand?

For what it is worth, even after years of Python 
programming, I still sometimes write this:

for i in len(myList):
     # Oops.

I too prefer range() or xrange() over magic syntax, but 
I'm not especially a lover of the range() idiom. How 
about this? With the introduction of a single keyword, 
we could do this:

for i in 2 to 5:
     print i,

which would print 2 3 4 5

(I'm open to arguments that it should be more Pythonic 
and less mathematical, and halt at 4.)

A second keyword "downto" would allow easy backwards 
loops, and a third "step" will absolutely kill any 
chance of Guido agreeing to this whatsoever.



> Haskell also has a good step notation.  In Haskell:
> 
> [1..10] means [1,2,3,4,5,6,7,8,9,10]
> [1,3..10] means [1,3,5,7,9]

I'm wary of that notation. It is too easy to make 
typos, what with , and . next to each other, and the 
typos often will not raise an exception but will simply 
give incorrect but puzzling behaviour. This isn't 
unique to the proposed syntax (e.g. under Python today 
it isn't obvious whether [0,3] is a typo for [0.3]) but 
it gives me pause.


-- 
Steven.



From tdelaney at avaya.com  Sun Feb 26 18:05:16 2006
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Mon, 27 Feb 2006 10:05:16 +1100
Subject: Use of __slots__
Message-ID: <2773CAC687FD5F4689F526998C7E4E5F074351@au3010avexu1.global.avaya.com>

Steve Juranich wrote:

> IMHO, __slots__ is unpythonic.  Many others have stated so on the
> list. That's why it's great that you're free to ignore that variable.
> I suggest that you do so (as I have chosen to do).  I'm sure that
> there are situations where you *MUST* have this kind of capability,
> but I haven't bumped into them yet.

In general, I would agree that __slots__ is unpythonic. And I can state
categorically that there is *no* situation where __slots__ is actually
required - everything semantically that __slots__ does (including the
incidental restriction of attributes) can be done via other mechanisms.

That being said ... there *are* use cases for __slots__ (otherwise it
would not exist ;) Specifically, __slots__ is a memory and performance
optimisation. One you should almost never use.

In my self.super recipe
<http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/286195>, use of
__slots__ made a measurable difference in performance - and since my aim
was to replace `super(cls, self)` with `self.super`, getting as close to
the performance of `super(cls, self)` was important.

Eventually of course, I achieved my best results using Pyrex and
on-the-fly bytecode modification ... interestingly, the fastest approach
I could find with Python (excluding the bytecode modifications) was
slightly different to the fastest approach in Pyrex.

Tim Delaney


From johnjsal at NOSPAMgmail.com  Sat Feb 11 16:42:44 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Sat, 11 Feb 2006 16:42:44 -0500
Subject: simple math question
In-Reply-To: <1139689646.268366.264060@z14g2000cwz.googlegroups.com>
References: <RuWdnVmaD4Q23XPeRVn-tw@rcn.net>
	<1139689646.268366.264060@z14g2000cwz.googlegroups.com>
Message-ID: <JrSdnaQ_xMwBx3PenZ2dnUVZ_tmdnZ2d@rcn.net>

Rinzwind wrote:
> '/' is a floor division (1/2 == 0) unless validated by a from
> __future__ import division.
> 
> So:
> 5/2=2.5 -> nearest lowest non-decimal number makes it 2.
> 5/-2=-2.5 -> nearest lowest non-decilmal number makes it -3
> 

Ah, this makes the most sense to me. -2.5 rounded down is -3. I guess I 
was thinking of it more in terms of "-2 goes into 5 -3 times", which is 
a little hard to wrap my mind around.


From varunhiremath at iitm.ac.in  Fri Feb 24 12:43:46 2006
From: varunhiremath at iitm.ac.in (Varun Hiremath)
Date: Fri, 24 Feb 2006 23:13:46 +0530
Subject: KPanelApplet using Python
In-Reply-To: <1140789115.123838.210280@t39g2000cwt.googlegroups.com>
References: <mailman.2391.1140782029.27775.python-list@python.org>
	<1140785533.642904.263660@j33g2000cwa.googlegroups.com>
	<1140789115.123838.210280@t39g2000cwt.googlegroups.com>
Message-ID: <20060224174346.GA14662@localdomain>

On Fri, 24 Feb, 2006 at 05:51:55AM -0800, richmoore44 at gmail.com wrote:
I want to make a PanelApplet and not a systray application. I tried KSystemTray and it works flawlessly but I want to add a widget to the taskbar like knews or kweather. I am trying to use the pyKDE's KPanelApplet class but I don't know exactly how to use it. I need some help regarding this.

Thank You

-- 
-----------------------------------------------
Varun Hiremath
461, Jamuna Hostel
IIT Madras,
Chennai - 600 036
mob : +919840299732
-----------------------------------------------
My Webpage : http://www.ae.iitm.ac.in/~ae03b032
-----------------------------------------------


From bdesth.quelquechose at free.quelquepart.fr  Tue Feb 21 18:52:54 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 22 Feb 2006 00:52:54 +0100
Subject: Zope/Plone - Is it the right solution?
In-Reply-To: <1140535939.444599.30350@g43g2000cwa.googlegroups.com>
References: <1140532818.195281.316580@g44g2000cwa.googlegroups.com>
	<mailman.2236.1140534872.27775.python-list@python.org>
	<1140535939.444599.30350@g43g2000cwa.googlegroups.com>
Message-ID: <43fb8321$0$28082$626a54ce@news.free.fr>

kbperry a ?crit :
> Well,
> I guess our main goal in this class is to improve usability and user
> experiences at the site.
> 
> While we want to improve our site visually and make it more usable to
> the prospective students, the site needs to be easily updated.  I don't
> think that I am looking for a wiki.

Don't overlook this solution. A wiki can be made good-looking, and you 
just can't beat it when it comes to ease of use for non-technical 
persons (and for technical persons too...). Modern wikis like MoinMoin 
or the Wiki part of Trac are also very extensibles.

For the record, for our own extranet, we're actually switching from CPS 
(a very-close-to-Plone CMF) to... Trac - there's not even a subversion 
repository around, but we use the Wiki/Ticket/Roadmap combo to manage 
our current projects.

Now Plone is a pretty good CMS for Portal-like sites, so it may be what 
you're looking for...


From felipe.lessa at gmail.com  Tue Feb 14 06:08:22 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Tue, 14 Feb 2006 09:08:22 -0200
Subject: Loop Backwards
In-Reply-To: <43f19e0f$0$4761$636a55ce@news.free.fr>
References: <1139883877.323042.199040@o13g2000cwo.googlegroups.com>
	<43f19e0f$0$4761$636a55ce@news.free.fr>
Message-ID: <1139915302.5381.1.camel@kenshin>

Em Ter, 2006-02-14 ?s 10:08 +0100, bruno at modulix escreveu:
> for item in reversed(alist):
>   do_something_with(item)
> 
> or (more perlish at first sight):
> 
> for item in alist[::-1]:
>   do_something_with(item)

No "or" here. The [::-1] version creates a whole new list in memory,
it's silly to believe both will behave equally (well, strictly speaking
they will, but one will use twice more memory than the other).

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From http  Sat Feb 11 15:38:13 2006
From: http (Paul Rubin)
Date: 11 Feb 2006 12:38:13 -0800
Subject: simple math question
References: <RuWdnVmaD4Q23XPeRVn-tw@rcn.net>
Message-ID: <7x4q354one.fsf@ruckus.brouhaha.com>

John Salerno <johnjsal at NOSPAMgmail.com> writes:
> Can someone explain to me why the expression 5 / -2 evaluates to -3,
> especially considering that -2 * -3 evaluates to 6?
> 
> I'm sure it has something to do with the negative number and the
> current way that the / operator is implemented, but why doesn't it
> evaluate to -2 instead?

Well, -2 * -2 is 4, which is not especially better than 6.  The
reason for choosing -3 instead of -2 is so that if b is positive,
then a%b is non-negative even if a is negative.  That is, the
motivating case is (-5 % 2) which is done the same way as (5 % -2).

You want (b*(a/b) + a%b)==a at all times.  If (-5 / 2) = -3, then you
need (-5 % 2) = -1.  But if (-5 / 2) = -2, then (-5 % 2) = +1.
Since a%b is positive, you can use it as a list index, etc.


From tdelaney at avaya.com  Wed Feb  8 18:07:49 2006
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Thu, 9 Feb 2006 10:07:49 +1100
Subject: module with __call__ defined is not callable?
Message-ID: <2773CAC687FD5F4689F526998C7E4E5F4DB927@au3010avexu1.global.avaya.com>

Steven D'Aprano wrote:

> That's not a _reason_, it is just a (re-)statement of fact. We know
> that defining a __call__ method on a module doesn't make it callable.
> Why not? The answer isn't "because defining a __call__ method on a
> module or an instance doesn't make it callable", that's just avoiding
> the question. 

My reading of the OP sounded like he wanted to know the *technical*
reason for why it doesn't work - which is what I provided.

If you can come up with a convincing argument, after re-reading the OP
(as I've just done), that that is *not* what he meant, I'm all ears.

Tim Delaney


From enterr at gmail.com  Wed Feb 15 15:35:46 2006
From: enterr at gmail.com (Atanas Banov)
Date: 15 Feb 2006 12:35:46 -0800
Subject: %SystemDrive%
In-Reply-To: <dsvv5j$4dm$1@solaris.cc.vt.edu>
References: <dsvt14$rev$1@solaris.cc.vt.edu><43F37BDE.9020505@activestate.com>
	<mailman.1965.1140031059.27775.python-list@python.org>
	<dsvv5j$4dm$1@solaris.cc.vt.edu>
Message-ID: <1140035746.935167.205020@z14g2000cwz.googlegroups.com>

using
   os.chdir('/')
   os.getcwd()
is plain wrong in Windows.

what it does is change the current directory to root of the CURRENT
DRIVE (i.e. the drive of the directory where script was started from),
not the system drive. for example, if current directory was
c:\myscripts and system drive is d:, this will return c:\ and not d:\.
hence chdir doesnt do any good, you can do os.getcwd()[:3] with the
same success.

os.environ['SYSTEMDRIVE'] is the right way to go.
btw it correctly returns just drive letter and colon, a drive name
doesnt include [back]slash



From steve at REMOVETHIScyber.com.au  Tue Feb 14 06:43:50 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Tue, 14 Feb 2006 22:43:50 +1100
Subject: file names longer than MAX_PATH under Windows 2003
References: <dssev8$tr5$1@news.rtcomm.ru>
Message-ID: <pan.2006.02.14.11.43.48.318400@REMOVETHIScyber.com.au>

On Tue, 14 Feb 2006 14:29:44 +0300, Sergey wrote:

> Hello.
> 
> I try to open file with pathname length 282 bytes:
> E:\files\..................\something.dat
> 
> On MSDN (http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/fs/naming_a_file.asp) described method to access 
> files with path length
> up to 32000 bytes: just add prefix \\?\ to file name.
> But when I try to pass prefixed name to file(), I get the same result as when I don't add the prefix: file not found. May be Python 
> just doesn't support long unicode filenames?
> Is there way to open such files?

Backslashes have special meaning to Python and need to be escaped. If you
do this:

f = file("E:\files\...\something.dat", "r")

Python's string escape rules means you are actually trying to open the
file "E:files...something.dat" which doesn't exist.

You should escape the backslashes:

f = file("E:\\files\\...\\something.dat", "r")

or use raw strings:

f = file(r"E:\files\...\something.dat", "r")

or just use forward slashes and let Windows deal with it:

f = file("E:/files/.../something.dat", "r")


Does this help?



-- 
Steven.



From deets at nospam.web.de  Sat Feb 18 17:40:20 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 18 Feb 2006 23:40:20 +0100
Subject: 2-dimensional data structures
In-Reply-To: <45plumF7tr0nU1@uni-berlin.de>
References: <43ss7mF1n4eg5U1@individual.net>
	<mailman.1110.1138311076.27775.python-list@python.org>
	<45pk2dF7o7egU1@individual.net> <45plumF7tr0nU1@uni-berlin.de>
Message-ID: <45pm2kF7tr0nU2@uni-berlin.de>

Diez B. Roggisch schrieb:
> The question is not so much which region a give square is in, but more 
> which square contains which fields. If we assume that you number your 
> squares row-wise (top-left zero, top-right 3, bottom-right 9), this 
> function computes the field indices that a given square is composed of:

I'm confusing squares with fields here. What I meant by a square here is 
the 3x3 region, of which 9 exist. Each has 3x3=9 cells.

Diez


From cfbolz at gmx.de  Thu Feb 23 03:56:18 2006
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Thu, 23 Feb 2006 09:56:18 +0100
Subject: using breakpoints in a normal interactive session
In-Reply-To: <1140636120.056812.119310@g43g2000cwa.googlegroups.com>
References: <1140636120.056812.119310@g43g2000cwa.googlegroups.com>
Message-ID: <43FD78B2.3020004@gmx.de>

dan.gass at gmail.com wrote:
> Is there a way to temporarily halt execution of a script (without using
> a debugger) and have it put you in an interactive session where you
> have access to the locals?  And possibly resume?  For example:
> 
> 
>>>>def a():
> 
> ...   x = 1
> ...   magic_breakpoint()
> ...   y = 1
> ...   print "got here"
> ...
> 
>>>>a()
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "<stdin>", line 3, in a
>   File "<stdin>", line 2, in magic_breakpoint
> 
>>>>x
> 
> 1
> 
>>>>y
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> NameError: name 'y' is not defined
> 
>>>>magic_resume()
> 
> got here
> 
>>>>x
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> NameError: name 'x' is not defined
> 

you can use the standard-library code module for that: instead of 
magic_breakpoint() just call code.interact(local=locals()). The 
magic_resume() would be a regular Ctrl-D (or Ctrl-Z Enter under 
windows). You can also package this nicely into a convenient function, 
see for example the third example on the following page:

http://effbot.org/librarybook/code.htm

Cheers,

Carl Friedrich Bolz



From john_zenger at yahoo.com  Sat Feb 11 11:37:13 2006
From: john_zenger at yahoo.com (John Zenger)
Date: Sat, 11 Feb 2006 11:37:13 -0500
Subject: How to check...
In-Reply-To: <1139660094.920792.136560@g14g2000cwa.googlegroups.com>
References: <1139660094.920792.136560@g14g2000cwa.googlegroups.com>
Message-ID: <_dqdnaNfm-Uhj3PenZ2dnUVZ_tudnZ2d@comcast.com>

This should be just a matter of determining how your string is encoded 
(ASCII, UTF, Unicode, etc.) and checking the ord of each character to 
see if it is in the contiguous range of English characters for that 
encoding.  For example, if you know that the string is ASCII or UTF-8, 
you could check ord for each character and confirm it is less than 128.

Lad wrote:
> Hello,
> How can I  check that a string does NOT contain NON English characters?
> Thanks
> L.
> 


From John-Whitlock at ieee.org  Mon Feb 20 15:33:31 2006
From: John-Whitlock at ieee.org (JW)
Date: 20 Feb 2006 12:33:31 -0800
Subject: general coding issues - coding style...
In-Reply-To: <slrndvgosa.t5c.mac@news.calmar.ws>
References: <slrndve8oe.5jb.mac@news.calmar.ws>
	<1140305345.408445.49100@g43g2000cwa.googlegroups.com>
	<slrndvgosa.t5c.mac@news.calmar.ws>
Message-ID: <1140467611.258139.254490@g43g2000cwa.googlegroups.com>

About this line:
1585 if sys.path[0][-12:] == "\library.zip":  #for py2exe

pl... suggested:
if sys.path[0].endswith( "\\library.zip" ):

and said, "did you really mean one back-slash there?".  You responded
"yeah, one backslash", but I still don't believe you.  In this case, it
happens to work, but you should be aware that the back-slash is an
escape character, which causes the next character to be interpreted
differently.  Try this in your interpreter:

print "\a" # System bell - might cause your speaker to beep
print "\t"  # Tab character
print "\n" # Newline character / sequence

See http://www.python.org/doc/2.4.2/ref/strings.html for more details
on the escape sequences that Python recognizes.  Here's a summary: if
the backslash + character is a special escape code, then replace it
with that, otherwise assume the programmer meant a real backslash.
That's dangerous, and will break when the name changes from one that
starts with an L to one that starts with an A, B, F, N, etc.  The safe
way it to tell Python "Yes, I really want a backslash", which is
indicated with the double backslash:

print "\\library.zip"

If you don't use the double backslash, you'll eventually have a
problem, especially in Windows, which unfortunately uses the backslash
as a directory seperator.  You might also want to look at os.sep and
the os.path.* functions, if you are interested in making your code work
on different platforms.  

JW



From aleaxit at yahoo.com  Sun Feb 12 17:22:34 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 12 Feb 2006 14:22:34 -0800
Subject: Another n00b: Removing the space in "print 'text', var"
References: <43efb1ba$0$14855$c3e8da3@news.astraweb.com>
Message-ID: <1hanh8h.1mps2k711dajm4N%aleaxit@yahoo.com>

HappyHippy <not at bleedin.likely> wrote:

> More of a minor niggle than anything but how would I remove the 
> aforementioned space?
> 
> eg.
> strName = 'World'
> print 'Hello', strName, ', how are you today?'
> 
> comes out as "Hello World , how are you today?"
> 
> Have googled, and worked my way through the first 7 chapters of Byte of
> Python, but to no avail...

Use string formatting:

print 'Hello %s, how are you today?' % strName


Alex


From dan.gass at gmail.com  Thu Feb 23 09:33:52 2006
From: dan.gass at gmail.com (dan.gass at gmail.com)
Date: 23 Feb 2006 06:33:52 -0800
Subject: using breakpoints in a normal interactive session
In-Reply-To: <mailman.2337.1140685003.27775.python-list@python.org>
References: <1140636120.056812.119310@g43g2000cwa.googlegroups.com>
	<mailman.2337.1140685003.27775.python-list@python.org>
Message-ID: <1140705231.970333.27380@o13g2000cwo.googlegroups.com>

Carl -- Perfect!  That is exactly what I want.  I hoped it would be
that easy.  Thanks for taking the time to post the solution.



From zzhikang at hotmail.com  Fri Feb 24 21:53:01 2006
From: zzhikang at hotmail.com (kanchy kang)
Date: Sat, 25 Feb 2006 02:53:01 +0000
Subject: why don't many test frameworks support file-output?
In-Reply-To: <43ff27f1$1@nntp0.pdx.net>
Message-ID: <BAY108-F3E46E73B4BC65CA6575C8CDF00@phx.gbl>

one question for you:
have anyone teach you how to listen to other's idea before?

this mail-list is only for exchanging idea, and aslo i provided my 
suggestion or "practice" or idea for test framework. if what i said is 
wrong, you can point it out as you like.
did i order anybody, or you?

you are the man not likely to listening to others.
if i would hire some, i don't think you are.
if you are some software's author, i would not use the software.
just because you are the man not likely to listening to others.

hehe


>From: Scott David Daniels <scott.daniels at acm.org>
>To: python-list at python.org
>Subject: Re: why don't many test frameworks support file-output?
>Date: Fri, 24 Feb 2006 07:43:20 -0800
>
>kanchy kang wrote:
> >
> > I don't think redirecting stdout to a file is a good resolution.
>Nobody is suggesting:
>      python program.py >output
>or
>      program.py >output
>
>What is being suggested is:
>      import sys
>      import module
>      original, sys.stdout = sys.stdout, open('output', 'w')
>      try:
>          module.main()
>      finally:
>          result, sys.stdout = sys.stdout, original
>          size = result.tell()
>          result.close()
>          print size, 'bytes written to file "output"'
>
>If, however, you want everyone else to conform to your personal idea
>of "best practices," then hire them and tell them to do it your way.
>
>--Scott David Daniels
>scott.daniels at acm.org
>--
>http://mail.python.org/mailman/listinfo/python-list

_________________________________________________________________
Don?t just search. Find. Check out the new MSN Search! 
http://search.msn.click-url.com/go/onm00200636ave/direct/01/



From fredrik at pythonware.com  Mon Feb 13 14:22:49 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Feb 2006 20:22:49 +0100
Subject: trapping errors in function call syntax
References: <m8m1v1h8ae545nsqbl777plviddc94vsdd@4ax.com>
Message-ID: <dsqmab$98v$1@sea.gmane.org>

Avi Kak wrote:

> Suppose I write a function that I want to be called
> with ONLY keyword argumnts, how do I raise an
> exception should the function get called with
> what look like position-specfic arguments?

here's one way to do it:

>>> def func(*args, **kw):
...     def myrealfunc(a=1, b=2, c=3):
...             print a, b, c
...     if args:
...             raise TypeError("invalid call")
...     return myrealfunc(**kw)
...
>>> func(1)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 5, in func
TypeError: invalid call
>>> func(a=3)
3 2 3
>>> func()
1 2 3

here's another one:

>>> def func(dummy=None, a=1, b=2, c=3):
...     if dummy is not None:
...             raise TypeError("invalid call")
...     print a, b, c

(but this is easier to trick).

hope this helps!

</F>





From a.schmolck at gmail.com  Mon Feb 20 12:16:35 2006
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: 20 Feb 2006 17:16:35 +0000
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
Message-ID: <yfsmzgmne6k.fsf@oc.ex.ac.uk>

Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> writes:

> Alexander Schmolck a ?crit :
> > Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> writes:
> >
> 
> >>DH a ?crit :
> >>(snip)
> >>
> >>>It is by design. Python is dynamically typed. It is essentially an
> >>>interpreted scripting language like javascript or ruby or perl,
> >>
> >>
> >>It's not a "scripting" language, and it's not interpreted.
> > Of course it is. What do you think happens to the bytecode?
> 
> 
> Ok, then what do you think happens to 'machine' code ?

It gets interpreted (by a CPU, for example) -- your point being? If it is that
my definition of interpreted language would be overly inclusive, note that the
difference between interpreting byte code is a task that at least arguably
still belongs to the python language proper (and there even is a public
bytecode interface) whereas interpreting machine code typically falls outside
the tasks and specifications of the language that generated it. In any event,
I didn't make any claims that some particular language is *not* interpreted.


> "interpreted" usually means "no compilation, all parsing etc redone at each
> execution", which is not the case with a bytecode/vm based implementation.

When people (including the python website maintainers) talk about interpreted
languages they often include all languages that don't compile to machine code.
"Interpreted language" is not a terribly well defined concept and the usage of
words also changes to reflect general trends. Since pretty much no language of
any significance today is still interpreted in the sense you hold to be
canonical, when people talk about interpreted languages nowadays they (IMHO)
typically mean something else. This is just Grice in action.

> > And if python
> > isn't a scripting language, then what on earth is?
> 
> 
> bash is a scripting language for *n*x systems. javascript is a scripting
> language for web browsers. VBScript is a scripting language for MS
> applications.

Python is also a scripting language for *n*x systems and various applications.
 
> > You might want to argue about whether scriping language is a meaningful and
> > useful concept,
> 
> A scripting languagee is a language whose main purpose is to be embbeded in an
> application to provide the user a way of programmaticaly automate some tedious
> tasks.

A few lines ago bash was also a scripting language but I can't personally
recall ever seeing bash embedded in some application.

> Now you could of course argue about what is an application...
> 
> > but it's really hard to see how you could talk about "scripting
> > languages" without including python.
> 
> Ho, really ? How many applications using Python as scripting language ? 

I'd guess dozens. Several Gnome and Kde programs, some scientific software, a
number of games and other commercial software such as UML editors.

> And how many applications written in Python ?

No idea. My guess would be that there are far fewer high-profile end user
applications written in python than embedding python, though.
 
> Python *can* be used as a scripting language (and is not too bad at it), but
> it *is* not a scripting language.
 

Interviewer: "Why did you create Python in the first place?"
 
Guido: "We wanted Amoeba to be as useful as Unix for our daily work, but it was
        lacking a scripting language. So I set out to design my own."

Summary of my position: it's futile pedantry trying to correct someone who
claims that python is an interpreted scripting language, since neither of
these terms are terribly well defined and your definitions don't even seem to
be internally fully consistent and certainly have the appearance of
disagreeing with those of the creator of the language.

If you dislike people refering to python as "interpreted" you can always add
that it compiles to bytecode. But the poster you corrected was already aware
of that and mentioned it himself.

'as


From kp8 at mac.com  Mon Feb 27 00:01:58 2006
From: kp8 at mac.com (kpp9c)
Date: 26 Feb 2006 21:01:58 -0800
Subject: ls files --> list packer
In-Reply-To: <440273e8$1_1@newspeer2.tds.net>
References: <1140765792.864556.289820@i40g2000cwc.googlegroups.com>
	<1140767111.490691.42460@e56g2000cwe.googlegroups.com>
	<dtml8u$1vh$1@gemini.csx.cam.ac.uk>
	<1141012342.805500.308750@i39g2000cwa.googlegroups.com>
	<440273e8$1_1@newspeer2.tds.net>
Message-ID: <1141016518.080809.259990@j33g2000cwa.googlegroups.com>

Thank you... i was looking in the wrong place cause all i found was
this relatively useless doc:

http://docs.python.org/lib/module-os.html

which says almost nothing.



From reply.in.the.newsgroup at my.address.is.invalid  Mon Feb 13 13:01:47 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Mon, 13 Feb 2006 19:01:47 +0100
Subject: hard disk activity
References: <1139850420.902979.71620@o13g2000cwo.googlegroups.com>
Message-ID: <g9i1v1lbf2rhmgskmkh5f9mt73s67umckk@4ax.com>

VSmirk:
>I have a task that involves knowing when a file has changed.  But while
>for small files this is an easy enough task, checking the modification
>dates, 

Checking the modification time works the same way for large files. Why is
that not good enough?

What's your platform?

-- 
Ren? Pijlman


From dcrespo at gmail.com  Fri Feb 17 14:00:41 2006
From: dcrespo at gmail.com (Daniel Crespo)
Date: 17 Feb 2006 11:00:41 -0800
Subject: Print a PDF transparently
In-Reply-To: <fk0cv159vg81i62524nvpuueg8q7iorcnk@4ax.com>
References: <1140184955.674138.275010@o13g2000cwo.googlegroups.com>
	<11vbpu58sll1b4f@corp.supernews.com>
	<1140190758.951694.231890@f14g2000cwb.googlegroups.com>
	<fk0cv159vg81i62524nvpuueg8q7iorcnk@4ax.com>
Message-ID: <1140202841.650774.32920@z14g2000cwz.googlegroups.com>

> Adobe has a Windows PostScript driver for free; but that still
> leaves you out... It works as a "printer" but you still have to run the
> normal application to print /to/ it -- and that is what you say you
> don't want! http://www.adobe.com/support/downloads/detail.jsp?ftpID=1500

Yes, I've seen it, but that's it: another program that I have to
install, which I want to avoid.

I'd be happy if I just do "printer.Print(file.pdf/.ps)" and wal?, the
printing just starts (in 98,2000,XP... sounds like a dream), without
having another window opened. If it opens, but then closes, it's
perfect too. I have tried installing Ghostscript, and having a .ps when
I order that file to print, it does the job. The thing here is that I
have to install it.

All this has to be easilly installed (with InnoSetup, for example),
because I have to install it on 70 offices. So I can't leave it to
another installation process. All of these offices have a dot matrix
printers Epson LX-300, which has PostScript level 3 built-in.

Where can I find how to send a .ps directly to the printer?

Daniel



From lashkariNO at SPAMworldviz.com  Wed Feb 15 16:18:36 2006
From: lashkariNO at SPAMworldviz.com (Farshid Lashkari)
Date: Wed, 15 Feb 2006 13:18:36 -0800
Subject: Is empty string cached?
Message-ID: <cUMIf.11894$MJ.4803@fed1read07>

When I pass an empty string to a function is a new string object created 
or does python use some global pre-created object? I know python does 
this with integer objects under a certain value. For instance, in the 
following code is a new string object created for each function call?

func(0,'')
func(1,'')
func(2,'')
func(3,'')

I tried the following commands in the interactive shell:

 >> x = ''
 >> y = ''
 >> x is y
True
 >> x = 'hello'
 >> y = 'hello'
 >> x is y
True

This leads me to believe that python does reuse existing strings, but 
once the variables are removed, does the item still exist in the cache?

-Farshid


From hancock at anansispaceworks.com  Tue Feb 28 22:13:39 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Tue, 28 Feb 2006 21:13:39 -0600
Subject: Default Section Values in ConfigParser
In-Reply-To: <1141175132.554532.123560@t39g2000cwt.googlegroups.com>
References: <1141175132.554532.123560@t39g2000cwt.googlegroups.com>
Message-ID: <20060228211339.5a92f266@samwise.anansi>

On 28 Feb 2006 17:05:32 -0800
"mwt" <michaeltaft at gmail.com> wrote:
> I want to set default values for a ConfigParser. So far,
> its job is very small, so there is only one section
> heading, ['Main']. Reading the docs, I see that in order
> to set default values in a ConfigParser, you initialize it
> with a dictionary or defaults.

You know, I never noticed that, but there is another way.

I used a multi-line string constant with the same syntax
as the original file, and just fed that in as the first
source (this is particularly easy, so I think it must have
been intended).  Slightly snipped version of my code for
this:

default_cfg = StringIO("""\
[VARIMAGE]
V1_COMPATIBILITY: ON

[SECURITY]
MAX_OPERATORS: 0
""")

# Look for varimage.cfg in 3 possible locations:
config = ConfigParser.ConfigParser()
config.readfp(default_cfg)
config.read(['/etc/varimage.cfg',           
os.path.expandvars('${INSTANCE_HOME}/varimage.cfg'),        
   os.path.join(pkghome, 'varimage.cfg') ])


-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From johnjsal at NOSPAMgmail.com  Fri Feb 24 09:38:11 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 24 Feb 2006 14:38:11 GMT
Subject: a little more help with python server-side scripting
In-Reply-To: <dtmhot$4t4$1@wake.carmen.se>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<dSoLf.1663$No6.38996@news.tufts.edu> <dtmhot$4t4$1@wake.carmen.se>
Message-ID: <nTELf.1667$No6.38886@news.tufts.edu>

Magnus Lycka wrote:

> The other option is ASP. You have been given information about
> that already. Be aware that ASP does not imply VBScript. You can
> use Python in ASP as long as that's enabled. It seems to be exactly
> what you are asking for, so I don't understand why you seem to reject
> it. Don't you like the file name endings?

Maybe I'm misunderstanding what is meant when you say to use ASP. I'm 
thinking that it involves having to learn another language (such as C# 
with ASP.NET), instead of writing my code in Python. Is that not the case?


From Bryce.Cooper at gmail.com  Thu Feb 16 20:19:04 2006
From: Bryce.Cooper at gmail.com (Bryce)
Date: 16 Feb 2006 17:19:04 -0800
Subject: Installing python on lynxOS
Message-ID: <1140139144.787566.207230@g14g2000cwa.googlegroups.com>

I'm trying to install python2.4.2 onto lynxOS 4.0.0. with gcc 2.95.3.
I was wondering if anyone who has done this before could give me some
pointers.

I'm currently getting the following error when running make:

    gcc -o python Module/python.o libpython2.4.a -lsocket -lm
    called2:ld returned 1 exit status
    libpython2.4.a(pystate.o):In function 'PyThreadState_New':
Python2.4.2/pystate.c:191: undefined reference to
'_PyGILState_NoteThreadState'
    called2:ld returned 1 exit status

I checked pystate.c and the function _PyGILState_NoteThreadState is
defined in the file, so I'm a bit lost here.

-- 
Bryce



From grante at visi.com  Sat Feb 11 09:05:39 2006
From: grante at visi.com (Grant Edwards)
Date: Sat, 11 Feb 2006 14:05:39 -0000
Subject: Yet another GUI toolkit question...
References: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
	<dskp1p$huu$01$1@news.t-online.com>
Message-ID: <11urrpjerst8f3c@corp.supernews.com>

On 2006-02-11, Florian Nykrin <fn-mail at t-online.de> wrote:

> wxPython works very well on Windows, but on Linux (Ubuntu/Debian in my 
> case) it is very difficult to work with and buggy.

That's odd.  I've been using wxPython for many years on both
Windows and on many distributions and haven't found a bug yet.
I admit that wxWidgets doesn't have the most elegent API in the
world...

-- 
Grant Edwards                   grante             Yow!  Thousands of days of
                                  at               civilians... have produced
                               visi.com            a... feeling for the
                                                   aesthetic modules --


From alanmk at hotmail.com  Thu Feb 16 04:26:10 2006
From: alanmk at hotmail.com (Alan Kennedy)
Date: 16 Feb 2006 01:26:10 -0800
Subject: PyXML SAX Q?
References: <1140041512.995754.269980@g47g2000cwa.googlegroups.com>
Message-ID: <1140081970.656929.324980@f14g2000cwb.googlegroups.com>

[mitsura at skynet.be]
> is it possible to use SAX to parse XML that is not in a file but in a
> large string?
> If I open my XML file and read the content into a string variable. Is
> there a way I can pass it to the PyXML Sax handler?
> The reason I want to know is that I need to parse XML that is generated
> by a process on a Unix system. I can connect to the process via a
> socket and the the XML but I need to store the XML somewhere before I
> can parse it.
> I could dump it to a file first and then hand it to the parser but that
> seems unefficient.
>
> Maybe I could read the XML from the socket directly into the parser.

You can find exactly what you need in this old thread about incremental
XML parsing.

Parsing XML streams
http://groups.google.com/group/comp.lang.python/msg/e97309244914343b?

--
alan kennedy
------------------------------------------------------
email alan:              http://xhaus.com/contact/alan



From fredrik at pythonware.com  Sun Feb  5 10:02:02 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 5 Feb 2006 16:02:02 +0100
Subject: New Python.org website ?
References: <c4qdnSebt6zPBCXeRVn-pQ@comcast.com>	<dpaa87$2oa$1@panix3.panix.com>	<LN2dnQMoFpiCWyfeRVn-sg@comcast.com>	<43C4E198.2080107@holdenweb.com>	<dqksuf$dlm$1@sea.gmane.org>	<43CE35E5.8000604@pollenation.net><dqmqcm$p34$1@sea.gmane.org>	<dqnht5$rfq$1@sea.gmane.org><dqnkr4$4ju$1@sea.gmane.org>	<43CF5FBF.5090901@pollenation.net><mailman.753.1137669022.27775.python-list@python.org><bbNzf.110402$km.42803@edtnps89>
	<xcNzf.110403$km.2313@edtnps89>
Message-ID: <ds541c$gtu$1@sea.gmane.org>

> <whisper>
> If you build it, they will come.
> </whisper>

http://pydotorg.dyndns.org:8000

</F>





From duncanm255 at hotmail.com  Mon Feb 27 14:21:36 2006
From: duncanm255 at hotmail.com (D)
Date: 27 Feb 2006 11:21:36 -0800
Subject: Waiting for Connection
In-Reply-To: <44032991$1_3@newspeer2.tds.net>
References: <1141055065.100567.199430@p10g2000cwp.googlegroups.com>
	<44032991$1_3@newspeer2.tds.net>
Message-ID: <1141068096.073908.165660@t39g2000cwt.googlegroups.com>

Thanks Kent!  update_idletasks()  does exactly what I needed, which as
you mentioned was just to give it enough time to reconfigure the
button.

Doug



From cfbolz at gmx.de  Sat Feb 11 09:38:19 2006
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Sat, 11 Feb 2006 15:38:19 +0100
Subject: is there a better way?
In-Reply-To: <1hakfjo.j6t8d31cslz6tN%aleaxit@yahoo.com>
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
	<1hakfjo.j6t8d31cslz6tN%aleaxit@yahoo.com>
Message-ID: <dsksss$q0$1@sea.gmane.org>

Alex Martelli wrote:
> markscala at gmail.com <markscala at gmail.com> wrote:
> 
> 
>>Problem:
>>
>>You have a list of unknown length, such as this: list =
>>[X,X,X,O,O,O,O].  You want to extract all and only the X's.  You know
>>the X's are all up front and you know that the item after the last X is
>>an O, or that the list ends with an X.  There are never O's between
>>X's.
> 
> 
> If the list is incredibly long, you should use a bisection approach.
> Standard module bisect in the Python library could help, but mostly as
> an _example_, since it unfortunately relies on normal alphabetic order,
> and alphabetically speaking X should come _after_ O, not _before_.
> 
> But the algorithm is still sound:
> 
> 1. look at the midpoint.
> 2. if it's an X, so are all previous items -- recurse to second half
> 3. if it's an O, so are all following items -- recurse to first half
> 
> Getting all conditions exactly right is tricky (which is why bisect is a
> good model!), but this way you get O(log N) performance for a list of
> length N.
> 
> If N is not too huge, O(N) might be OK, and is, of course, way simpler
> to code!-)
> 

The code would look something like this:

low = 0
high = len(L)
while low < high:
     mid = (low + high) // 2
     if L[mid] == 0:
         high = mid
     else:
         low = mid + 1
list_of_X = L[:low]


Cheers,

Carl Friedrich Bolz



From struggleyb at gmail.com  Sat Feb 18 01:31:20 2006
From: struggleyb at gmail.com (Bo Yang)
Date: Sat, 18 Feb 2006 14:31:20 +0800
Subject: How many web framework for python ?
Message-ID: <43F6BF38.5020004@gmail.com>

Hello everybody ,
I am a student major in software engeering .
I need to do something for my course .

There are very good web framework for java and ruby ,
Is there one for python ?
I want to write a web framework for python based on
mod_python as my course homework , could you give some
advise ?


From webraviteja at gmail.com  Sat Feb 18 00:39:42 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 17 Feb 2006 21:39:42 -0800
Subject: Delete a file
In-Reply-To: <mailman.2084.1140234511.27775.python-list@python.org>
References: <fc5d4c490602171457p6c54193at@mail.gmail.com>
	<mailman.2084.1140234511.27775.python-list@python.org>
Message-ID: <1140241182.937916.54420@g47g2000cwa.googlegroups.com>

No! It's ..
os.remove(filename) or os.unlink(filename)



From grante at visi.com  Tue Feb 28 18:35:50 2006
From: grante at visi.com (Grant Edwards)
Date: Tue, 28 Feb 2006 23:35:50 -0000
Subject: Rounding up to the nearest exact logarithmic decade
References: <1141165716.023456.318240@u72g2000cwu.googlegroups.com>
	<1141169196.826108.122460@i39g2000cwa.googlegroups.com>
Message-ID: <1209nimsc9ntr2c@corp.supernews.com>

On 2006-02-28, johnzenger at gmail.com <johnzenger at gmail.com> wrote:
> I like Fredrik's solution.  If for some reason you are afraid of
> logarithms, you could also do:
>
>>>> x = 4978
>>>> decades = [10 ** n for n in xrange(-1,8)]
>>>> import itertools
>>>> itertools.ifilter(lambda decade: x < decade, decades).next()
> 10000
>
> BTW, are the python-dev guys aware that 10 ** -1 = 0.10000000000000001 ?

You're joking, right?

-- 
Grant Edwards                   grante             Yow!  HOORAY, Ronald!! Now
                                  at               YOU can marry LINDA
                               visi.com            RONSTADT too!!


From fuzzyman at gmail.com  Thu Feb  2 09:05:39 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 2 Feb 2006 06:05:39 -0800
Subject: cgi - secure sessions
In-Reply-To: <1138887222.504350.209200@z14g2000cwz.googlegroups.com>
References: <1138842390.012855.107610@g44g2000cwa.googlegroups.com>
	<7x8xsuczxz.fsf@ruckus.brouhaha.com>
	<1138844380.094365.223840@g44g2000cwa.googlegroups.com>
	<1138871331.983318.58170@f14g2000cwb.googlegroups.com>
	<1138887222.504350.209200@z14g2000cwz.googlegroups.com>
Message-ID: <1138889138.968284.14880@g47g2000cwa.googlegroups.com>


GazaM wrote:
> Ok, thanks for all the help guys. It seems that running this type of
> script from inside of the html just isn't going to work as needed.
> Seems like I'll just have to ditch the .shtml and point directly to a
> cgi. This is how the other Python frameworks and sites work, such as
> reddit and plone etc right?

I'm not sure if you can 'include' a CGI and expect the reults to get
included in a page (although I think I've heard of PHP being used in
that way.)

It doesn't sound like it's working for you anyway.

All the best,


Fuzzyman
http://www.voidspace.org.uk/python/index.shtml



From steve at REMOVETHIScyber.com.au  Fri Feb  3 07:55:18 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 03 Feb 2006 23:55:18 +1100
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<GrGdnYYzsbcBLH_eRVn-iQ@comcast.com>
	<mailman.1372.1138945618.27775.python-list@python.org>
	<1138967950.697932.213160@g49g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.03.12.55.17.611322@REMOVETHIScyber.com.au>

On Fri, 03 Feb 2006 03:59:10 -0800, n.estner wrote:

>> I still see "newbie-friendliness" as a
>> MAJOR plus for Python -- it increases the chance that users
>> of your software will become contributors.
> 
> Yes, I 100% agree to that point!
> But the point is, the current situation is not newbie-friendly (I can
> tell, I am a newbie): I declare a method with 3 parameters but when I
> call it I only pass 2 parameters. That's confusing.

Yes, I understand what you mean now. When I was a newbie, it took me a
little while to get the difference between ordinary functions and methods
too, although I had little OO experience before Python. I don't know if
that helped or hindered the learning experience.

With the current syntax, you have to learn some special behaviour:

class Foo:
    def bar(self, x, y):
        pass

but you call Foo().bar(x, y) 

But with your syntax, you still have to learn special behaviour:


# outside the class definition
self.bar  # look up "bar" in self's namespace. self must already exist.

# inside a class definition
class Foo:

    self = Something()  # normal class attribute "self" created
    # this works because self is not a keyword
    # Foo now has an attribute "self"

    def self.bar(x, y):
        # create a method "bar" with "self" in bar's namespace
        # Foo now has an attribute "bar" (which is a method)
        pass

    self.bar = None   # normal attribute access
    # Foo attribute "self" is modified to have an attribute "bar"

    # there is no conflict between self the attribute and self the 
    # special parameter because they live in different namespaces
    # but looking at them, there is an apparent conflict


So, most of the time, foo.bar looks up attribute "bar" in foo; but in a
method definition, foo.bar assigns attribute "foo" in bar. That's special
behaviour too, and it seems to me probably harder to live with and even
more confusing than the behaviour you aim to remove.



-- 
Steven.



From sbaush at gmail.com  Fri Feb 17 17:57:29 2006
From: sbaush at gmail.com (Sbaush)
Date: Fri, 17 Feb 2006 23:57:29 +0100
Subject: Delete a file
Message-ID: <fc5d4c490602171457p6c54193at@mail.gmail.com>

Hi.
In my application i create a PNG image and i view it in a frame.
How can delete it from my python code?
Bye...

--
Sbaush
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20060217/d4091dc5/attachment.html>

From dstark7 at gmail.com  Sun Feb 12 13:13:02 2006
From: dstark7 at gmail.com (dmsbox2000-list1@yahoo.com)
Date: 12 Feb 2006 10:13:02 -0800
Subject: Tracking down memory leaks?
In-Reply-To: <pan.2006.02.12.15.24.39.863752@REMOVETHIScyber.com.au>
References: <1139749861.949765.282310@z14g2000cwz.googlegroups.com>
	<1139752915.618372.325450@o13g2000cwo.googlegroups.com>
	<pan.2006.02.12.15.24.39.863752@REMOVETHIScyber.com.au>
Message-ID: <1139767982.590519.60050@g47g2000cwa.googlegroups.com>

>> I'm not an expert on python internals, and it is possible that they have
>> a way of checking for cases like this.   I think the deepcopy method
>> catches this, but I don't *think* basic garbage collection look for this
>> sort of thing.
>
> deepcopy has nothing to do with garbage collection.
>
> This is where you use deepcopy:
>
> py> a = [2, 4, [0, 1, 2], 8]  # note the nested list
> py> b = a         # b and a both are bound to the same list
> py> b is a        # b is the same list as a, not just a copy
> True
> py> c = a[:]      # make a shallow copy of a
> py> c is a        # c is a copy of a, not a itself
> False
> py> c[2] is a[2]  # but both a and c include the same nested list
> True
>
> What if you want c to include a copy of the nested list? That's where you
> use deepcopy:
>
> py> d = copy.deepcopy(a)
> py> d[2] is a[2]
> False

What I ment is that deepcopy is recursive, and if you have a circular
reference in your data structure a recursive copy will become infinite.
 I think deepcopy has the ability to detect this situation.  So if it
could be detected for deepcopy, I don't see why it could not be
detected for garbage collection purposes.

David



From grante at visi.com  Sat Feb 25 10:35:18 2006
From: grante at visi.com (Grant Edwards)
Date: Sat, 25 Feb 2006 15:35:18 -0000
Subject: python-list/python-dev quoting style
References: <dtml9t$367$1@gemini.csx.cam.ac.uk> <dtnjdt$n9q$1@panix2.panix.com>
	<dto7um$ils$1@gemini.csx.cam.ac.uk> <dtoti4$nmj$1@panix3.panix.com>
	<dtouti$327$1@gemini.csx.cam.ac.uk>
	<1200ktdnodqqr26@corp.supernews.com>
	<dtpo4l$jml$1@gemini.csx.cam.ac.uk>
	<mailman.2432.1140879887.27775.python-list@python.org>
Message-ID: <1200u9m81c2tdc9@corp.supernews.com>

On 2006-02-25, Steve Holden <steve at holdenweb.com> wrote:

>> [Aahz]
>> 
>>>>>And who is "me", anyway?
>> 
>> [me]
>> 
>>>>It's hard to believe that you don't understand who "me" is in
>>>>a conversation between two people,
>> 
>> [Grant Edwards]
>> 
>>>Since when is a Usenet news group a conversation between two
>>>people?
>> 
>> Now there are three. At that time only two people had participated in 
>> this thread.
>> 
>> Is there really confusion about who "me" is? I find that
>> mystifying.
>
> Well, *I* know who "me" is. That makes you an impostor.
>
> see-how-nobody-knows-who-you-are-now-ly y'rs  - steve

And now none of us have any way to know who the [me] above is.

-- 
Grant Edwards                   grante             Yow!  Hmmm... a CRIPPLED
                                  at               ACCOUNTANT with a FALAFEL
                               visi.com            sandwich is HIT by a
                                                   TROLLEY-CAR...


From rtilley at vt.edu  Mon Feb 13 13:51:11 2006
From: rtilley at vt.edu (rtilley)
Date: Mon, 13 Feb 2006 18:51:11 +0000
Subject: invert the order of a string
Message-ID: <dsr600$9sj$1@solaris.cc.vt.edu>

s = list('some_random_string')
print s
s.reverse()
print s
s = ''.join(s)
print s

Surely there's a better way to do this, right?


From aleaxit at yahoo.com  Wed Feb  1 21:47:16 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Wed, 1 Feb 2006 18:47:16 -0800
Subject: locals() and dictionaries
References: <1138818258.895406.34130@g47g2000cwa.googlegroups.com>
	<drr0oo$2mb$1@news.doit.wisc.edu>
	<1138833843.647435.242870@f14g2000cwb.googlegroups.com>
Message-ID: <1ha3g50.1kymcvzkvrjetN%aleaxit@yahoo.com>

JerryB <grblanco at gmail.com> wrote:
   ...
> is it possible to access the individual members of a dictionary using %
> locals() when creating a string?

Not by using the built-in locals(); you'd have to override locals to
mean someting different (not recommended).


Alex


From lycka at carmen.se  Wed Feb  1 05:51:13 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 01 Feb 2006 11:51:13 +0100
Subject: Test driven programming, was Re: VB to Python migration
In-Reply-To: <rlSDf.148748$6K2.76617@edtnps90>
References: <DjyCf.110918$AP5.12355@edtnps84>
	<1138421531.231633.41140@z14g2000cwz.googlegroups.com>
	<drj04s$7c6$1@wake.carmen.se>
	<1138566539.478552.113180@g49g2000cwa.googlegroups.com>
	<drlckk$ete$1@wake.carmen.se> <KPtDf.150306$AP5.92261@edtnps84>
	<drnd3j$s4d$1@wake.carmen.se> <rlSDf.148748$6K2.76617@edtnps90>
Message-ID: <drq3r2$qmu$1@wake.carmen.se>

Josh wrote:
> As for the testing, that's something we'll need to learn about. I've 
> read some articles about test driven programming in relation to extreme 
> programming. Can you give me links to any good sites explaining how this 
> all works? (Off list may be better for these off-topic links)

I think this might be interesting to more people...

There is some stuff from my Europython presentation in 2004 here:
http://www.thinkware.se/epc2004test/
The pdf and the "log" from a test-first-session might be of interest.
The pdf contains a number of relevant links.

You might also want to look at the TextTest testing framework, which
has been developed here at Carmen Systems. http://texttest.carmen.se/

With tools like the unittest module, you have to write and maintain
a lot of low level tests. With TextTest you have to write your
application so that it can produce textual output in a repeatable
way. TextTest will basically store all the output from a test run,
and compare that to subsequent test runs.

While unittest is more intended for low level tests written by the
programmer so that he can verify that his program does what he
intended, TextTest is more useful as a regression testing tool or
for acceptance tests, to verify that a software system behaves as
it is required to do. Their applicability overlaps though, and
depending on your type of application, your own preferences etc,
you might use either approach or a combination. At Carmen, we
mainly use TextTest.

Other interesting testing frameworks are Fit, http://fit.c2.com/
and FitNesse http://www.fitnesse.org/ but I have no hands-on
experience with them. For Python code, use PyFit, see e.g.
http://agiletesting.blogspot.com/2004/11/writing-fitnesse-tests-in-python.html


From ciesinger at gmx.net  Sun Feb 12 16:27:40 2006
From: ciesinger at gmx.net (Daniel Ciesinger)
Date: Sun, 12 Feb 2006 22:27:40 +0100
Subject: Is Forth for real?
In-Reply-To: <pan.2006.02.12.17.38.02.455701@REMOVETHIScyber.com.au>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
	<1139754010.067582.214830@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>
	<1v44c3-geo.ln1@lairds.us>
	<pan.2006.02.12.17.38.02.455701@REMOVETHIScyber.com.au>
Message-ID: <dso98d$764$1@svr7.m-online.net>

Steven D'Aprano schrieb:
> On Sun, 12 Feb 2006 17:08:02 +0000, Cameron Laird wrote:
> 
> 
>>In article <pan.2006.02.12.15.11.04.739314 at REMOVETHIScyber.com.au>,
>>Steven D'Aprano  <steve at REMOVETHIScyber.com.au> wrote:
>>
>>>on the web for each language. By comparison, even Forth gives 13 million
>>>plus hits, and who uses Forth?

13m hits for forth as in "set forth", "firth of forth" etc.
.
>>The programmers of, among other things, the FedEx bar-code reader,
>>the Sun boot loader, and parts of the Space Shuttle.
> 
> You missed Apple's boot loader.

And LOTs of small tools, scripts, analyzers written in Forth, because it 
has such a nice "evaluate", beating e.g. JavaScript "evaluate" by a 
speed advantage around 1000 or more...
You can feed that with a datastream such as

123.50 MONITOR Rx 03 DC 0A 0D
124.00 COMMS   Tx 01 A5

...and convert such stuff into XML, SVG or any representation you like.
Very useful (and fast) e.g. for automotive applications.

> I love Forth. I'm no good at thinking at that low count-the-bytes level,
> but if I was, I'd much prefer to use Forth than C or assembly. I've got a
> bunch of Forth books here, and when I'm bored I read them for
> entertainment, and dream. I love the fact that Forth is still in use. But
> I'm under no illusions that there are millions of Forth developers getting
> paid to write in Forth.

Maybe a few hundred - and then some thousands who write their utils in 
Forth during their paid time...

Daniel



From darkpaladin79 at gmail.com  Sun Feb  5 11:26:51 2006
From: darkpaladin79 at gmail.com (Ivan Shevanski)
Date: Sun, 5 Feb 2006 11:26:51 -0500
Subject: Learning Python
In-Reply-To: <17d4ae400602050826w4aa691f6r75484768af31233e@mail.gmail.com>
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
	<ds588v$6s4$02$1@news.t-online.com>
	<17d4ae400602050826w4aa691f6r75484768af31233e@mail.gmail.com>
Message-ID: <17d4ae400602050826y65fd1021sa5fcd5ba33215ba2@mail.gmail.com>

On 2/5/06, Ivan Shevanski <darkpaladin79 at gmail.com> wrote:
>
>
>
> On 2/5/06, Florian Nykrin <fn-mail at t-online.de> wrote:
> >
> > Hi Byte!
> >
> > Your code should look like this:
> >
> > x = raw_input('Please enter your name: ')
> > if x == 'myself': print 'OK'
> >
> > Because myself should be a string and not a variable name, you have to
> > put it in quotes.
> >
> > Regards, Florian.
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
>
>
> --
>
>

Oh, I was under the impression that myself is a variable name. . .Who would
type in myself as their name? If it is a variable it's fine how it is, but
if it is a string put it in quotes.



-Ivan
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From singletoned at gmail.com  Wed Feb  8 08:40:02 2006
From: singletoned at gmail.com (Ed Singleton)
Date: Wed, 8 Feb 2006 13:40:02 +0000
Subject: Question about idioms for clearing a list
In-Reply-To: <dsci8h$lkl$1@wake.carmen.se>
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au>
	<ds83kd$98m$1@sea.gmane.org>
	<mailman.1510.1139250471.27775.python-list@python.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<E78Gf.22893$Jd.14515@newssvr25.news.prodigy.net>
	<dsb3lq$shu$1@sea.gmane.org>
	<mailman.1568.1139350103.27775.python-list@python.org>
	<dsci8h$lkl$1@wake.carmen.se>
Message-ID: <34bb7f5b0602080540i445f091do@mail.gmail.com>

On 08/02/06, Magnus Lycka <lycka at carmen.se> wrote:
> Ed Singleton wrote:
> > Is it obvious to a newbie what the difference between mappings and
> > "not-mappings", and is it obvious exactly what is and isn't a mapping?
> >
> > Should it be necessary to "know" python before it becomes easy to use?
>
> QOTW! (You are joking, aren't you? :)

It was a genuine question.  Judging from one of your other responses,
that you are still learning new things and remembering forgotten ones
after 10 years, I assume the answer is "no, it is not necessary". 
(I'm also assuming you find Python easy to use).

The thing that first attracted me to Python was that I only had to
read a page or two of the tutorial before I could get started on doing
little things with Python and find it easy.

> I can undestand how people can turn a bit defensive when some
> people who are more skilled in programming than in diplomacy
> basically tells the confused that they are ignorant and should
> just learn the language.
>
> On the other hand, I think that Art Siegel said it very well:
> "My ability to grok Python to any extent, from that starting point,
> was based on an understanding that it was my responsibility to come
> to Python, not it to me."
> (Actually, that's a much better QOTW! It gives me flashbacks from
> a book I once read, http://www.amazon.com/gp/product/0060958324 )
>
> There are just a few statements in Python. Some of them should
> really have been functions (print and exec) but anyway, they are
> still few enough to learn. There are also a few ways to get inside
> composite objects, x.y, x[y], x[y:z]. These things are among the
> most fundamental in Python.
>
> If luminaries like Fredrik Lundh and Raymond Hettiger tells you
> that things should be done in a certain way, it's really just
> silly to argue further. I've programmed Python since 1996, but if
> these guys tell me I'm wrong, I won't bother to argue. If I don't
> understand their position, I'll try to study the subject further,
> and I might ask them to clarify, but I'll assume that they are
> right. That assumption has worked so far for me.

I didn't know they were luminaries.  I apologise.  I've never heard of
any of the people on the list before I came to Python and the only
people I've learned to trust are Kent Johnson and Alan Gauld.  I guess
if I start to see those guys say things that turn out to be right I
might start assuming they are right as well.

Maybe there should be a list of luminaries on the website so we know
who not to argue with?

> There are warts and quirks in Python, everybody will agree to that,
> but Python is *not* Perl. A basic motto has always been to avoid
> synonyms, to try to provide as few ways to do one thing, rather
> than to provide as many ways, as possible. This has proven very
> successful in making Python easy to learn and use. The opposite
> approach has made Perl into the favourite programimng language
> among people who think that "if the program was difficult to write,
> it should be difficult to read as well!"

I think people concentrate on the total number of ways to do
something, when the obviousness or consistency of one one of those
ways is more important.

For example one of the few things Microsoft does okay at, is in having
a pretty consistent interface across their applications.  There's a
menu bar that (theoretically) has all the commands you can perform in
a structured format.  But you can also use reasonably consistent
keyboard shortcuts to do something, or context menus for things that
you do a lot.

Having several different ways means that everyone can use the way they
prefer.  Beginners tend to use the menu bar a lot as they can always
find what they want there, but can start using the keyboard shortcuts
as they start to perform the action a lot and start to become more
experienced.

I know this isn't entirely applicable but hopefully you see the analogy.

> When you can't transfer one approach from one type to another,
> there is a reason for that. A few times it might be due to some
> obscure practical aspect of the implementation, but most of the
> time, it's completely intentional, and finding these aspects of
> Python, learning why they are the way they are, and embracing the
> language rather than trying to fight it, is actually very rewarding.

No, it's rewarding for a certain type of person.  It's not a rewarding
activity for every type of person.  I find it deeply frustrating when
I have to constantly look things up to see what is the way of doing
things for this type.  I'd rather spend my time writing code then
looking things up to see which way I have to do it now.

> Tuples aren't just immutable lists--they have different purposes
> beyond that. Ordereded and unordered collections are conceptually
> different. Neither call-by-referece nor call-by-value describes
> parameter passing in Python well, the clue lies in understanding
> how assignments and objects work, and you need to understand the
> difference between mutable and immutable objects etc. There are
> a number of fundamental concepts that you need to understand to
> really use Python well.
>
> Python works very smoothly, and you can do a lot of productive
> work with it even if you don't know these things, but in time
> you'll trip over them, and as you do, you need to grok these
> concepts to get further. Asking for some syntactic change or
> some convenience method so that you can get a little further
> without understanding the fundamental concept isn't the way to
> get beyond these little stumbling blocks.
>
> It's a bit as if you call the design department of your car
> manufacturer and tell them how they should redesign the suspension
> since it was so bumpy when you drove around with flat tires.
> Saying that it's too much to ask that you keep the tires filled
> with the right amount of air won't meet much sympathy.

It probably wouldn't meet with much sympathy, but that's not to say
it's not a decent point for someone to make.

Inflatable tyres are getting quite antiquated now.  There's plenty of
substances that would be better to fill tyres with than air.  there
are already tyres that don't burst when you push a 6-inch nail into
them because they are filled with a hard foam.  They work better,
don't puncture, last longer, but hey is it too much to ask for you to
keep your tyres filled with air and replace them every time you get a
puncture and carry a fifth wheel around in case you get a puncture and
there's no way to fix the tyre?

Ed


From paul at boddie.org.uk  Thu Feb 23 18:43:39 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 23 Feb 2006 15:43:39 -0800
Subject: a little more help with python server-side scripting
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<dSoLf.1663$No6.38996@news.tufts.edu>
	<1140729214.352258.242320@u72g2000cwu.googlegroups.com>
	<4PpLf.1664$No6.38743@news.tufts.edu>
Message-ID: <1140738219.915160.140890@p10g2000cwp.googlegroups.com>

John Salerno wrote:
> Paul Boddie wrote:
>
> > No, it means that you either write Python programs which produce pages
> > as output, according to the CGI specification, or that you embed Python
> > code inside ASP files, as described in the above document.
>
> > I haven't used ASP, and I've been working hard to remove from my memory
> > any trace of similar systems (eg. JSP), but I imagine that if you want
> > to include normal Python programs inside ASP files, there may be a way
> > of using some kind of "include" directive. Take a look at the above
> > document for some ideas.
>
> Why do you mention ASP though? Can't this be done without it?

You mean, can't you just write normal HTML files, add some kind of
"include" directive, call them something ending in .html, and then have
the server produce a combination of normal HTML and the output from
Python code? Well, not really, since that (apart from the .html
extension on the filename) is a description of what ASP is about, more
or less.

But yes, if you want to run Python code without doing strange things
with ASP files, then just write a program (not a Web page, but an
actual Python program) as described in the Microsoft document (or
virtually any introduction to CGI with Python), upload it into the
appropriate folder/directory with a filename ending in .py and test it
out! See this recipe for other examples (found using the search text
"CGI Python" with Google):

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52220

Paul



From fredrik at pythonware.com  Thu Feb 16 10:56:24 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 16 Feb 2006 16:56:24 +0100
Subject: question about scope
References: <9J0Jf.1630$No6.38274@news.tufts.edu>
Message-ID: <dt27ba$pm6$1@sea.gmane.org>

John Salerno wrote:

> But my real question is this, which is related to the above:
>
> "Name references search at most four scopes: local, then enclosing
> functions (if any), then global, then built-in."
>
> I understand what global and built-in are, and I thought I understood
> the concept of local too, but when I got to this sentence (and the
> previous sentence), I became confused about the first two scopes. What's
> the difference between 'local' and 'enclosing functions'?

consider a nested function:

    var1 = "global"

    def outer():

        var2 = "enclosing"

        def inner():

            var3 = "local"

            print var1, var2, var3

        inner() # call it

inside "inner", var1 refers to the global variable, var2 to the enclosing
variable (which is local to "outer"), and var3 to the local variable.

"enclosing scope locals" are also called "free variables".

</F>





From irvine.david at gmail.com  Sat Feb 11 12:34:43 2006
From: irvine.david at gmail.com (dirvine)
Date: 11 Feb 2006 09:34:43 -0800
Subject: by reference
In-Reply-To: <em0ru1pr9ucr7adc6ql2d5imrk9alu7uau@4ax.com>
References: <mailman.1681.1139517426.27775.python-list@python.org>
	<1139598954.259297.74290@o13g2000cwo.googlegroups.com>
	<em0ru1pr9ucr7adc6ql2d5imrk9alu7uau@4ax.com>
Message-ID: <1139679283.723742.56550@g14g2000cwa.googlegroups.com>

Many thanks I will do so in the future.

David



From dbough77 at yahoo.com  Tue Feb 21 19:14:03 2006
From: dbough77 at yahoo.com (DannyB)
Date: 21 Feb 2006 16:14:03 -0800
Subject: Basic coin flipper program - logical error help
Message-ID: <1140567243.251982.255620@g14g2000cwa.googlegroups.com>

I'm just learning Python.  I've created a simple coin flipper program -
here is the code:

[source]
#Coin flipper
import random

heads = 0
tails = 0
counter = 0

coin = random.randrange(2)

while (counter < 100):
    if (coin == 0):
        heads += 1
        counter += 1
    else:
        tails += 1
        counter += 1

coin = random.randrange(2)


print "\nThe coin landed on heads", heads, "times."
print "\nThe coin landed on tails", tails, "times."
[/source]

<<<I'm sure the [source] tags don't work - I through them in there
anyway.>>>

The program runs - however - it will give me 100 heads OR 100 tails.
Can someone spot the logic error?  

Thanks

~Dan



From 63q2o4i02 at sneakemail.com  Sun Feb 19 15:02:25 2006
From: 63q2o4i02 at sneakemail.com (63q2o4i02 at sneakemail.com)
Date: 19 Feb 2006 12:02:25 -0800
Subject: Python vs. Lisp -- please explain
In-Reply-To: <Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
Message-ID: <1140376874.742720.298990@g14g2000cwa.googlegroups.com>

Great, thank you and everyone for this nice discussion.

Michael



From siona at chiark.greenend.org.uk  Wed Feb 22 10:44:53 2006
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 22 Feb 2006 15:44:53 +0000 (GMT)
Subject: No
References: <1140534490.873612.64280@g47g2000cwa.googlegroups.com>
	<dtfhv7$css$1@sea.gmane.org>
	<mailman.2265.1140551970.27775.python-list@python.org>
	<1140619645.303344.317890@g14g2000cwa.googlegroups.com>
Message-ID: <j-x*9gY-q@news.chiark.greenend.org.uk>

Gaz <gaz082 at gmail.com> wrote:
>So, they can not upload the photos by FTP because its too "geek" for
>them. And i need to have a standarized form to handle the reports,
>because otherwise its a organizational mess.

Am I missing something here, or is all you need a
<INPUT TYPE="FILE" ... >
on your form? Then you don't worry about filenames, you just get
their data supplied to your cgi script.

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From errmaker at gmail.com  Thu Feb  9 12:28:47 2006
From: errmaker at gmail.com (errmaker)
Date: 9 Feb 2006 09:28:47 -0800
Subject: Form1.show()
Message-ID: <1139506127.717796.284930@z14g2000cwz.googlegroups.com>

hi ! iam newbie on python.
how i can make form1 visible ? form just crated by pyqt



class Form1(QMainWindow):
    def __init__(self,parent = None,name = None,fl = 0):
        QMainWindow.__init__(self,parent,name,fl)
        self.statusBar()

       ............

        if self.MenuBar.findItem(1):
            self.MenuBar.findItem(1).setText(self.__tr("&File"))
        if self.MenuBar.findItem(2):
            self.MenuBar.findItem(2).setText(self.__tr("&Edit"))
        if self.MenuBar.findItem(3):
            self.MenuBar.findItem(3).setText(self.__tr("&Help"))


    def fileNew(self):
        print "Form1.fileNew(): Not implemented yet"

    ......


    def __tr(self,s,c = None):
        return qApp.translate("Form1",s,c)



From peter at engcorp.com  Tue Feb 21 14:00:58 2006
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 21 Feb 2006 14:00:58 -0500
Subject: Little tool - but very big size... :-(
In-Reply-To: <43FB5418.9000600@websafe.com>
References: <mailman.2211.1140513270.27775.python-list@python.org>	<dteo9g$3vp$1@news.lysator.liu.se>
	<43FB5418.9000600@websafe.com>
Message-ID: <dtfo18$4ht$1@sea.gmane.org>

Larry Bates wrote:
> Since the target is Windows only, consider using win32gui
> (part of Mark Hammonds win32 extensions) calls to use
> native Windows controls.  That way you can eliminate
> wxWindows altogether.  If all you need is a file dialog,
> it isn't very difficult.

A good point, and one the developer of Venster thought of as well, since 
he's already done much of this work (and without even requiring 
win32gui, as he went through the lighter-weight ctypes). 
http://venster.sourceforge.net/htdocs/index.html

(I haven't tried using this myself, but there's an 800K example of a 
Windows GUI app included on that page for download.)

-Peter



From larry.bates at websafe.com  Thu Feb  2 17:01:20 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Thu, 02 Feb 2006 16:01:20 -0600
Subject: Windows - create text file - (newb)
In-Reply-To: <1138916451.293717.283320@g44g2000cwa.googlegroups.com>
References: <1138916451.293717.283320@g44g2000cwa.googlegroups.com>
Message-ID: <43E28130.3040908@websafe.com>

Yes.

To open file:

fp=open(r'C:\directory\filename.txt','r')

To open file to write to:

fp=open(r'C:\directory\filename.txt','w')

You probably need to go through the Python tutorial as
these items are covered.

-Larry Bates




Ernesto wrote:
> Can Python be used to create (and/or open, read, and write) a text file
> in Windows (if the path is known) ?
> 


From noway at sorry.com  Sat Feb  4 18:36:12 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Sat, 04 Feb 2006 23:36:12 GMT
Subject: numeric expression from string?
References: <mailman.1413.1139061291.27775.python-list@python.org>
Message-ID: <MTaFf.160699$65.4497905@twister1.libero.it>

Brian Blais wrote:

> I have a string input from the user, and want to parse it to a
> number, and would like to know how to do it.  I would like to be able
> to accept arithmetic operations, like:
>
> '5+5'
> '(4+3)*2'
> '5e3/10**3'
>
> I thought of using eval, which will work, but could lead to bad
> security problems (not that it's a big  deal in my app, but still...)


eval() is the preferred way unless you have serious security reasons:

>>> def calc(s):
...   try:
...       return float(eval(s, dict(__builtins__=None)))
...   except Exception, e:
...       raise ValueError, "error during expression evaluation: %s" % e
...
>>> calc("3**4")
81.0
>>> calc("58+34*4")
194.0
>>> calc("58+34*4+a")
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 5, in calc
ValueError: error during expression evaluation: name 'a' is not defined
>>> calc("object.__class__")
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 5, in calc
ValueError: error during expression evaluation: name 'object' is not defined
>>> calc("3.__class__")
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 5, in calc
ValueError: error during expression evaluation: unexpected EOF while parsing
(line 1)
>>> calc("type(3).__class__")
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 5, in calc
ValueError: error during expression evaluation: name 'type' is not defined


Of course, one can still bring your system to its knees when
"1000**1000000000000000"...
-- 
Giovanni Bajo




From bob at passcal.nmt.edu  Thu Feb 23 13:40:19 2006
From: bob at passcal.nmt.edu (Bob Greschke)
Date: Thu, 23 Feb 2006 11:40:19 -0700
Subject: A C-like if statement
Message-ID: <hp-dnY20cusOnGPeRVn-rg@nmt.edu>

I miss being able to do something like this in Python

1f (I = a.find("3")) != -1:
    print "It's here: ", I
else:
    print "No 3's here"

where I gets assigned the index returned by find() AND the if statement gets 
to do its job in the same line.  Then you don't have to have another like 
that specifically gets the index of the "3".  Is there a way to do this in 
Python?

Thanks!

Bob




From arkanes at gmail.com  Sat Feb 11 08:33:07 2006
From: arkanes at gmail.com (Chris Mellon)
Date: Sat, 11 Feb 2006 07:33:07 -0600
Subject: Yet another GUI toolkit question...
In-Reply-To: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
References: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
Message-ID: <4866bea60602110533x6f65962bn87acf7d5a580d0f6@mail.gmail.com>

On 2/10/06, Kevin Walzer <sw at wordtech-software.com> wrote:
> ...with a twist.
>
> I'm undertaking my first semi-substantial Python GUI application after a
> long time dabbling with the language.
>
> I'm fairly experienced with Tcl/Tk, so Tkinter seems the obvious choice
> to reduce my Python learning curve. However, my Tcl applications
> typically make use of a *lot* of extensions to the core widget set, such
> as BWidgets, tablelist, and Tile.
>
> I've found minimal Tkinter wrappers for all of these extensions, but
> they are all labelled "experimental," lightly documented at best, and
> little-used (as far as I can tell) by Python developers.
>
> So: my question is, would it be more productive for me to wrestle with
> these extensions when there doesn't seem to be much constituency for
> their use, or would it be better/faster/more efficient for me to start
> scaling the wxPython mountain?
>
> For what it's worth, my application has to run on OS X and Windows, and
> will be commercial, so this combination of requirements rules out
> PyGTK/PyQt/just about every other cross-platform GUI toolkit.
>

If you're planning on selling an application, especially to OS X
users, then Tk is absolutely out of the question. It doesn't have even
the slightest resemblence to native behavior, and lacks the polish and
flash that occasionally lets a non-native app get away with it. Given
the limits you've stated, I believe your only options are wxPython and
writting 2 guis using PyWin/PyObjC. The second option requires
knowledge of the native tool sets for the respective platforms, so if
you don't have that I can only suggest wxPython. If you're used to Tk
you will face a learning curve, and you will need to look for or write
replacements for the custom widgets you've been using.

> Advice, especially from those Tkinter devs who look beyond the core
> widget set for their apps, is appreciated!
>
> --
> Kevin Walzer
> iReveal: File Search Tool
> http://www.wordtech-software.com
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From xavier.morel at masklinn.net  Sat Feb 25 15:00:20 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Sat, 25 Feb 2006 21:00:20 +0100
Subject: Pure python implementation of string-like class
In-Reply-To: <mailman.2437.1140887135.27775.python-list@python.org>
References: <20060225.102645.74687871.kayama@st.rim.or.jp>	<dtprtf$5dr$1@sea.gmane.org>
	<mailman.2437.1140887135.27775.python-list@python.org>
Message-ID: <dtqcr9$9fv$1@aphrodite.grec.isp.9tel.net>

Akihiro KAYAMA wrote:
> Sorry for my terrible English. I am living in Japan, and we have a
> large number of characters called Kanji. UTF-16(U+0000...U+10FFFF) is
> enough for practical use in this country also, but for academic
> purpose, I need a large codespace over 20-bits. I wish I could use
> unicode's private space (U+60000000...U+7FFFFFFF) in Python.
> 
> -- kayama

I think the Kanji are part of the Han script as far as Unicode is 
concerned, you should check it (CJK unified ideograms and CJK unified 
ideograms extension A), they may not all be there, but the 27502 
characters from these two tables should be enough for most uses.

Oh, by the way, the Unicode code space only goes up to 10FFFF, while 
UCS-4's encoding allows code values up to and including 7FFFFFFF the 
upper Unicode private space is Plane Sixteen (100000?10FFFF), the other 
private spaces being a part of the Basic Multilingual Plane 
(U+E000?U+F8FF) and Plane Fifteen (U+F0000?U+FFFFF) and even UTF-32 
doesn't go beyond 10FFFF.

Since the Dai Kan-Wa jiten "only" lists about 50,000 kanji (even though 
it probably isn't perfectly complete) it fits with ease in both plane 
fifteen and sixteen (65535 code points each).


From dausha at gmail.com  Mon Feb 13 08:36:10 2006
From: dausha at gmail.com (Ben Wilson)
Date: 13 Feb 2006 05:36:10 -0800
Subject: how do you pronounce 'tuple'?
In-Reply-To: <mailman.1822.1139835322.27775.python-list@python.org>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<mailman.1806.1139805039.27775.python-list@python.org>
	<uhk0v1tr5fsjnrtttuuaim8g8po4k6td8g@4ax.com>
	<mailman.1822.1139835322.27775.python-list@python.org>
Message-ID: <1139837770.066868.207410@f14g2000cwb.googlegroups.com>

Yeah, I was going to say it's "I-66," not "Route 66," which has been
replaced in pertainent parts by I-40.

tuh-ple.



From mooquack at suad.org  Wed Feb  8 18:18:03 2006
From: mooquack at suad.org (Kirk McDonald)
Date: Wed, 08 Feb 2006 15:18:03 -0800
Subject: UnboundMethodType and MethodType
In-Reply-To: <43ea0b11$1@nntp0.pdx.net>
References: <dsbl2g$i1b$1@news2.rz.uni-karlsruhe.de>
	<43e9635b$1@nntp0.pdx.net> <43e9f92c$1_3@newspeer2.tds.net>
	<43ea0b11$1@nntp0.pdx.net>
Message-ID: <43ea7afe$1@nntp0.pdx.net>

Scott David Daniels wrote:
> To elaborate on this, once 'id' is called, you drop the reference.
> This allows quite surprising things like:
>  >>> id(7**8) == id(8**7)
> True
>  >>> a, b = 7**8, 8**7
>  >>> id(a) == id(b) # this time there are other references to a and b
> False
> 
> If you wanted to test the original code for identity match:
>  >>> B.bar is B().bar
> False
> is the appropriate test (the 'is' test holds the identities through
> the comparison).
> 
> By the by, this is tricky stuff, nobody should expect to understand
> it thoroughly without both study and testing.
> 
> --Scott David Daniels
> scott.daniels at acm.org

You know what? That makes perfect sense. Thank you.

-Kirk McDonald


From mohankhurana at gmail.com  Sun Feb 12 08:11:02 2006
From: mohankhurana at gmail.com (MKoool)
Date: 12 Feb 2006 05:11:02 -0800
Subject: Tracking down memory leaks?
Message-ID: <1139749861.949765.282310@z14g2000cwz.googlegroups.com>

I have an application with one function called "compute", which given a
filename, goes through that file and performs various statistical
analyses.  It uses arrays extensively and loops alot.  it prints the
results of it's statistical significance tests to standard out.  Since
the compute function returns and I think no variables of global scope
are being used, I would think that when it does, all memory returns
back to the operating system.

Instead, what I see is that every iteration uses several megs more.
For example, python uses 52 megs when starting out, it goes through
several iterations and I'm suddenly using more than 500 megs of ram.

Does anyone have any pointers on how to figure out what I'm doing
wrong?

Thanks,
mohan



From sybrenUSE at YOURthirdtower.com.imagination  Wed Feb  1 05:10:28 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Wed, 1 Feb 2006 11:10:28 +0100
Subject: OpenRTS - new OSS Python game
References: <drq0vt$62f$1@orkan.itea.ntnu.no>
Message-ID: <slrndu128k.8gn.sybrenUSE@schuimige.unrealtower.org>

Andreas R. enlightened us with:
> OpenRTS is a new open source project, with the aim of creating a
> realtime strategy game. The game is developed in Python with Pygame.
> See http://www.openrts.org for more info about the game if you are
> interested.

To be honest, it looks very much like games from 1995...

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From modelnine at bit-bukket.org  Mon Feb 13 07:07:19 2006
From: modelnine at bit-bukket.org (Heiko Wundram)
Date: Mon, 13 Feb 2006 13:07:19 +0100
Subject: Mental Abuse
References: <1139519949.266435.18420@o13g2000cwo.googlegroups.com>
	<1139776103.836354.4320@o13g2000cwo.googlegroups.com>
Message-ID: <dspsk6$dpd$1@online.de>

rainbow.cougar at gmail.com wrote:
> > <snip>
> Can you say paranoid-schizophrenic?   I knew you could...

Schizophrenic is more than enough in this case...

--- Heiko.


From DavidPorterHolt at acm.org  Tue Feb 21 11:48:45 2006
From: DavidPorterHolt at acm.org (DavidPorterHolt)
Date: 21 Feb 2006 08:48:45 -0800
Subject: Exceptions
In-Reply-To: <1140540154.522838.193020@g14g2000cwa.googlegroups.com>
References: <1140540154.522838.193020@g14g2000cwa.googlegroups.com>
Message-ID: <1140540525.032755.209460@g47g2000cwa.googlegroups.com>

Here's the same clip, but run in the command line interpreter. The
error gives a little more info.

>>> try:
...     fsock = open('/notthere')
... except IOError:
...     print 'The file does not exist, exiting gracefully'
... print 'This line will always print'
  File "<stdin>", line 5
    print 'This line will always print'
        ^
SyntaxError: invalid syntax
>>>

Thanks,
David Holt
DavidPorterHolt at acm.org



From nyamatongwe+thunder at gmail.com  Mon Feb  6 19:46:47 2006
From: nyamatongwe+thunder at gmail.com (Neil Hodgson)
Date: Tue, 07 Feb 2006 00:46:47 GMT
Subject: UTF16, BOM, and Windows Line endings
In-Reply-To: <1139265255.239649.10100@g47g2000cwa.googlegroups.com>
References: <1139224580.820529.198120@z14g2000cwz.googlegroups.com>
	<SXPFf.245245$V7.89096@news-server.bigpond.net.au>
	<1139265255.239649.10100@g47g2000cwa.googlegroups.com>
Message-ID: <X5SFf.245339$V7.151952@news-server.bigpond.net.au>

Fuzzyman:

> Thanks - so I need to decode to unicode and *then* split on line
> endings. Problem is, that means I can't use Python to handle line
> endings where I don't know the encoding in advance.
> 
> In another thread I've posted a small function that *guesses* line
> endings in use.

    You can normalise line endings:

 >>> x = "a\r\nb\rc\nd\n\re"
 >>> y = x.replace("\r\n", "\n").replace("\r","\n")
 >>> y
'a\nb\nc\nd\n\ne'
 >>> print y
a
b
c
d

e

    The empty line is because "\n\r" is 2 line ends.

    Neil


From swell at netcourrier.com  Sat Feb 11 08:11:16 2006
From: swell at netcourrier.com (swell at netcourrier.com)
Date: 11 Feb 2006 05:11:16 -0800
Subject: Problem with smart pointers
Message-ID: <1139663476.740972.215150@g43g2000cwa.googlegroups.com>

Hello,
    I use the Boost.Python lib for a couple of weeks now and i am
facing a pb.
To sum up i have a small hierarchy of objects and have a factory to
build concrete object. The pb is i think aroud the auto_ptr object that
is not correctly managed by my code ( i use version 1.33 )
I think that the solution is obvious but i can't sort it out. If you
could have a look at this small test


struct X
{
 virtual int fun1() = 0;
 int fun2() { return 2;}
 virtual int fun3() { return -1; }
};

struct Y : public X
{
 int fun1() {return 1;}
 virtual fun3() { return 3; }
};

struct FactY
{
 static std:auto_ptr<X> create() { return std:auto_ptr<X>(new Y());}
};


BOOST_PYTHON_MODULE(hello)
{
 class_<X,  boost::noncopyable >("X",no_init);
 class_<Y,  boost::python::bases<X> >("Y")
  .def("fun1",&Y::fun1)
  .def("fun2",&Y::fun2)
  .def("fun3",&Y::fun3)
 ;

 class_<FactY>("FactY",no_init)
  .def("create",&FactY::create)
  .staticmethod("create")
 ;
}
 
Many Thx



From in1769c at motorola.com  Fri Feb 10 07:21:03 2006
From: in1769c at motorola.com (N Sharmishta-in1769c)
Date: Fri, 10 Feb 2006 17:51:03 +0530
Subject: help regarding installing python documentation
Message-ID: <772BCEF88A1DD91191F80011856715F3065CE5E3@zin24exm01.ap.mot.com>

Hi
I have installed the python 2.4 version and downloaded the HTML
documentation also.
But when I give the command help( ) in the IDLE command prompt and ' while '
,it says 
 
Sorry, topic and keyword documentation is not available because the Python
HTML documentation files could not be found.  If you have installed them,
please set the environment variable PYTHONDOCS to indicate their location.
 
I don't know how to set the variable PYTHONDOCS .kindly help .
 
Sharmishta

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20060210/c42f3145/attachment.html>

From ilias at lazaridis.com  Sat Feb 18 12:19:39 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Sat, 18 Feb 2006 19:19:39 +0200
Subject: [DICTIONARY] - Copy dictionary entries to attributes
Message-ID: <dt7kv6$dcn$1@usenet.otenet.gr>

remark: not sure if the term "dictionary" is correct here.

I have the following situation:

within a setup.cfg, settings are passed this way:

settings=project_page=theProjectPage.com
         myVar=myValue

those are accessible later like this:

settings['project_page'] / settings['myValue']

-

Now my question: is there any standard function to map the settings 
directly to attributes?

something like:

dictionary_make_attributes(settings)

thus they can be accessed via:

settings.project_page / settings.myVar

or

copy_dictionary_entries_to_attributes(vars, settings)

vars.project_page / vars.myVar

?

.

-- 
http://lazaridis.com


From s323 at mail.ru  Wed Feb 15 11:29:57 2006
From: s323 at mail.ru (Sergey)
Date: Wed, 15 Feb 2006 19:29:57 +0300
Subject: file names longer than MAX_PATH under Windows 2003
References: <mailman.1956.1140020466.27775.python-list@python.org>
Message-ID: <dsvku5$b39$1@news.rtcomm.ru>


"Tim Golden" <tim.golden at viacom-outdoor.co.uk> wrote in message news:mailman.1956.1140020466.27775.python-list at python.org...
[Sergey]


>Have a look at win32file.FindFilesIterator from the pywin32 extensions.
>Maybe that can cope? (I haven't looked at the source).

Yeah, it works!
THANK YOU!
(but now I must have two pieces of code, one for linux and one for windows)
Interesting, why developers of python didn't use here all power of win32 API?




From nogradi at gmail.com  Sat Feb 11 16:31:51 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Sat, 11 Feb 2006 22:31:51 +0100
Subject: pythonic exec* spawn*
In-Reply-To: <5f56302b0602100320l177dbe8ep184dbe2c6a17fc6a@mail.gmail.com>
References: <mailman.1686.1139521339.27775.python-list@python.org>
	<lbinu19o3nkqn5elsn4dqbvoueonh93ral@4ax.com>
	<mailman.1693.1139531778.27775.python-list@python.org>
	<barnu1li9c4vrldo6n4fd5f1uavhrdkfoa@4ax.com>
	<5f56302b0602100320l177dbe8ep184dbe2c6a17fc6a@mail.gmail.com>
Message-ID: <5f56302b0602111331t6a3c5b90o6b307ae725b577ab@mail.gmail.com>

> > >> os.fork() does that (on Mac and Unix).
> > >
> > >Okay, but how?
> >
> > Sorry, fork() is implemented strictly on a 'need to know' basis :-)
> >
> > >It seems to me that if the process which issued os.fork() ends, then
> > >the forked process also ends.
> >
> > No, no, they're not a quantum mechanic photon pair. Every process decides
> > for itself if and when to end. As long as it's not signalled/killed, that
> > is.
> >
> > >But the execute of longer( data ) should keep going even though the
> > >original program ended. I'm pretty sure it's something basic and
> > >probably I'm not aware of the right concepts and that's why I can't
> > >find the right place to look in the docs.
> >
> > You can search for "daemonize".
> >
> > Here's a recipe:
> > http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66012
> >
> > The concept is best explained in this book:
> > http://www.kohala.com/start/apue.html

Thanks again, the recipe was very useful, and in the meantime I also
found this article,
http://www.informit.com/content/images/art_deitel_creatingprocesses/elementLinks/pythonhtp1_fork_article.pdf
which explains os.fork and os.wait in a python context. Maybe some
others will also make use of it, it clearified the basics for me.


From eric_brunel at despammed.com  Thu Feb  9 09:24:42 2006
From: eric_brunel at despammed.com (Eric Brunel)
Date: Thu, 09 Feb 2006 15:24:42 +0100
Subject: Getting Tkinter Text contents before destruction
References: <p4KdnfDfuth6knXeRVn-jw@nmt.edu>
Message-ID: <ops4pmbgjirqur0o@eb.pragmadev>

On Mon, 6 Feb 2006 20:11:28 -0700, Bob Greschke <bob at greschke.com> wrote:

> Hi!
>
> I want to grab the contents of a Text widget when the frame it's on gets
> destroyed.  I tried TextWidget.bind("<Destroy>"... , but the widget is  
> gone
> before the call gets made, and I'd really hate to do something with the
> function that gets called with TextWidgetsFrame.bind("<Destroy>", ...,  
> since
> that one function handles all of the frames in the program...or would  
> that
> even work?
>
> How can I do this?

One way is to define the deletion callback for the text's parent window to  
get the text before the widget gets deleted. To do that, you can use  
text.winfo_toplevel() to get the parent Toplevel for your text widget,  
then define the callback via wdw.protocol('WM_DELETE_WINDOW', ...). Here  
is a detailed example:

-----------------------------------------------------
 from Tkinter import *

root = Tk()

txt = None

def openWdw():
   global txt
   wdw = Toplevel()
   frm = Frame(wdw)
   frm.pack(expand=1)
   txt = Text(frm)
   txt.pack()
   print txt.winfo_toplevel(), frm, root
   txt.winfo_toplevel().protocol('WM_DELETE_WINDOW', getText)

def getText():
   print txt.get(1.0, END)
   txt.winfo_toplevel().destroy()

Button(root, text='Go', command=openWdw).pack()

root.mainloop()
-----------------------------------------------------

This will of course only work if the only reason for which the text widget  
can be destroyed is if its parent window is closed.

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17;8(%,5.Z65\'*9--56l7+-'])"


From aleaxit at yahoo.com  Sun Feb  5 14:44:22 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 5 Feb 2006 11:44:22 -0800
Subject: Learning Python
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
	<ds588v$6s4$02$1@news.t-online.com>
	<1139156577.897100.69140@g43g2000cwa.googlegroups.com>
	<mailman.1439.1139157505.27775.python-list@python.org>
	<1139158796.288778.244000@z14g2000cwz.googlegroups.com>
	<1haa3vv.14kwor18tfjwnN%aleaxit@yahoo.com>
	<1139159638.941399.198050@g47g2000cwa.googlegroups.com>
Message-ID: <1haab7t.1rdvyzakrmpwfN%aleaxit@yahoo.com>

Byte <eoinrogers at gmail.com> wrote:

> Thanks, never knew that, but they are using raw_input as a stack,
> aren't they?

No.  raw_input is a function object, "using it as a stack" is a rather
meaningless phrase.  You can use a list as a stack, but that's totally
and absolutely unrelated to that spot in the tutorial.


Alex


From kent at kentsjohnson.com  Mon Feb 13 21:08:05 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Mon, 13 Feb 2006 21:08:05 -0500
Subject: readlines and break apart based on letters
In-Reply-To: <dsqpsb$lhb$1@solaris.cc.vt.edu>
References: <dsqpsb$lhb$1@solaris.cc.vt.edu>
Message-ID: <43f1372d_2@newspeer2.tds.net>

rtilley wrote:
> Hi,
> 
> While trying to better understand security descriptors on Windows. I've 
> been examining text-based security descriptors. I have the security 
> descriptors on individual lines stored in a text file. I want to break 
> these lines apart based on owner, group, dacl and sacl. These areas are 
> demarcated by O: G: D: and S:
> 
> There are no spaces in the lines. How can I read each line so that each 
> area is broken out? I'd like output like this:
> 
> O: details
> G: details or NONE
> D: details or NONE
> S: details or NONE
> 
> Here is an example SD:
> O:owner_sidG:group_sidD:dacl_flags(string_ace1)(string_ace2)...(string_acen)S:sacl_flags(string_ace1)(string_ace2)...(string_acen) 

It's a pretty simple regex:
  >>> import re
  >>> 
s='O:owner_sidG:group_sidD:dacl_flags(string_ace1)(string_ace2)...(string_acen)S:sacl_flags(string_ace1)(string_ace2)...(string_acen)'
  >>>
  >>> m=re.search(r'O:(.*?)G:(.*?)D:(.*?)S:(.*)', s)
  >>> m.group(1,2,3,4)
('owner_sid', 'group_sid', 
'dacl_flags(string_ace1)(string_ace2)...(string_acen)', 
'sacl_flags(string_ace1)(string_ace2)...(string_acen)')


From claudio.grondi at freenet.de  Fri Feb 24 09:36:18 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Fri, 24 Feb 2006 15:36:18 +0100
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <dtljre$f8i$1@newsreader3.netcologne.de>
References: <dtl9ad$35h$1@sea.gmane.org> <dtlat7$80c$1@sea.gmane.org>
	<mailman.2376.1140733288.27775.python-list@python.org>
	<dtljre$f8i$1@newsreader3.netcologne.de>
Message-ID: <dtn5l2$nhr$1@newsreader3.netcologne.de>

Claudio Grondi wrote:
> Paul Probert wrote:
> 
>> Peter Hansen wrote:
>>
>>> Are you saying that you believe the time.sleep(1) call is actually 
>>> blocking for 200 seconds?
> With such rare occurrence it is very hard to tell what is going on. 
> Usually I put such strange things on a list of curiosities I don't want 
> to know the reason of, because it is in my eyes not worth the effort. 
> Maybe it is even a common problem not yet detected by me, because I have 
> never run this kind of tests for such a long time.
> Starting today, I can tell you statistically not earlier than in one 
> week, if I have the same problem on my machines (currently I am running 
> only one or two at the same time).

Here the intermediate results on my Windows XP machine connected to the 
Internet via very fast digital phone line connection (network 
card/digital-converter box/phone-line):

dt= 1.125          time= 2006_02_24_11h_36m_15s
dt= 9.20200014114  time= 2006_02_24_12h_46m_49s
dt= 1.18799996376  time= 2006_02_24_14h_43m_32s

The code used:
"""
import time
while True:
   oldtime=time.time()
   time.sleep(1.0)
   newtime=time.time()
   dt=newtime-oldtime
   if dt > 1.1:
     print 'dt=',dt,' time=',time.strftime('%Y_%m_%d_%Hh_%Mm_%Ss')
"""
running in a command line console parallel to usual daily business on 
the computer.

The yesterday night run (5 hours) gave max. 1.125 sec., so I am 
surprized to see the 9 seconds already after only two hours today.

Claudio


From jstroud at ucla.edu  Sat Feb 11 15:25:18 2006
From: jstroud at ucla.edu (James Stroud)
Date: Sat, 11 Feb 2006 12:25:18 -0800
Subject: simple math question
In-Reply-To: <RuWdnVmaD4Q23XPeRVn-tw@rcn.net>
References: <RuWdnVmaD4Q23XPeRVn-tw@rcn.net>
Message-ID: <dslh7e$17b$1@daisy.noc.ucla.edu>

John Salerno wrote:
> Hi all. I'm just starting out with Python, so I'm a little slow right 
> now. :)
> 
> Can someone explain to me why the expression 5 / -2 evaluates to -3, 
> especially considering that -2 * -3 evaluates to 6?
> 
> I'm sure it has something to do with the negative number and the current 
> way that the / operator is implemented, but why doesn't it evaluate to 
> -2 instead?

Its an integer expression.

Try '5.0/-2' or '5/-2.0' or 'float(5)/-2' or '5/float(-2)' and compare 
'5/-2' to '5/2'.

James


From hancock at anansispaceworks.com  Thu Feb 23 21:41:52 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Thu, 23 Feb 2006 20:41:52 -0600
Subject: A C-like if statement
In-Reply-To: <pan.2006.02.23.22.14.53.56541@REMOVETHIScyber.com.au>
References: <hp-dnY20cusOnGPeRVn-rg@nmt.edu> <dtl04p$5q2$1@reader2.panix.com>
	<sdadnS6nfNnbmmPeRVn-sw@nmt.edu>
	<pan.2006.02.23.22.14.53.56541@REMOVETHIScyber.com.au>
Message-ID: <20060223204152.6eaefc90@samwise.anansi>

On Fri, 24 Feb 2006 09:14:53 +1100
"Steven D'Aprano" <steve at REMOVETHIScyber.com.au> wrote:
> There are *reasons* why Python discourages functions with
> side-effects. Side-effects make your code hard to test and
> harder to debug.

You of course meant "expressions with side-effects".  Python
is pretty good at making functions with side-effects. At
least it is if you want them. ;-)

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From kp8 at mac.com  Fri Feb 24 02:43:47 2006
From: kp8 at mac.com (kpp9c)
Date: 23 Feb 2006 23:43:47 -0800
Subject: ls files --> list packer
In-Reply-To: <1140765792.864556.289820@i40g2000cwc.googlegroups.com>
References: <1140765792.864556.289820@i40g2000cwc.googlegroups.com>
Message-ID: <1140767027.324220.82830@t39g2000cwt.googlegroups.com>

and one example of a slightly fancier version would be a variation that
looks recursively into subdirectories and makes separate lists for each
subdirectory encountered.

so if i had a directory called "~/snd/"

and in "~/snd/" i had:

"~/snd/one/"
"~/snd/two/"
"~/snd/three/"

each with soundfiles in it.

I could get those packed in three separate lists named after the
directory or some such thing....

This would be so awesome because my carefully organizing your
directory, you would be carefully
organizing your data, change your dir structure or add/delete some
files and you would get a new structure in your script... prolly would
work with scripting your iTunes music folder too...

gosh ... sorry ... just thinking out-loud here and getting kind of
giddy! reaching for the python book ...



From grante at visi.com  Mon Feb 20 10:24:52 2006
From: grante at visi.com (Grant Edwards)
Date: Mon, 20 Feb 2006 15:24:52 -0000
Subject: editor for Python on Linux
References: <dtai6e$23m$2@ariane.blic.net>
	<chlhv15ktc4u3adv34sgk63tok5vl9j50q@4ax.com>
	<43f8d9d3$0$3308$636a55ce@news.free.fr>
	<v3nhv19n1pjco7pm11u06nomd2j4mr38q2@4ax.com>
Message-ID: <11vjnq4q8o1ss11@corp.supernews.com>

On 2006-02-19, Rene Pijlman <reply.in.the.newsgroup at my.address.is.invalid> wrote:

>>I beg to disagree :-) Use ed
>>"Ed is the standard text editor."
>>http://www.gnu.org/fun/jokes/ed.msg.html
>
> That was 1991. This is 2006.

    That's a joke, son. A flag waver. You're built too low. The
    fast ones go over your head. Ya got a hole in your glove. I
    keep pitchin' 'em and you keep missin' 'em. Ya gotta keep
    your eye on the ball. Eye. Ball. I almost had a gag, son.
    Joke, that is. 

-- 
Grant Edwards                   grante             Yow!  Wait... is this a FUN
                                  at               THING or the END of LIFE in
                               visi.com            Petticoat Junction??


From darkpaladin79 at gmail.com  Thu Feb 23 16:54:35 2006
From: darkpaladin79 at gmail.com (Ivan Shevanski)
Date: Thu, 23 Feb 2006 16:54:35 -0500
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <dtla7j$pqs$1@newsreader3.netcologne.de>
References: <mailman.2369.1140730029.27775.python-list@python.org>
	<dtla7j$pqs$1@newsreader3.netcologne.de>
Message-ID: <17d4ae400602231354s1101b1alcb410ccd7e2e563c@mail.gmail.com>

On 2/23/06, Claudio Grondi <claudio.grondi at freenet.de> wrote:
>
> Paul Probert wrote:
> > Hi,
> >   My app runs in a loop looking for changes in a database, and like a
> > good boy I call time.sleep(1) inside the loop. Unfortunately this
> > sometimes runs for 200 seconds or so, presumably while my OS is calling
> > Bill Gates to tell him what I've been doing. This happens under NT4,
> > W2k, and XP. What do people do to fix this? Thanks!
> >
> > Paul Probert
> > University of Wisconsin
> >
>
> In similar situation I would start to blame the hardware for the
> problem, so below a kind of checklist to go through:
>
>    1. have you changed any hardware?
>    2. have you installed new drivers?
>    3. have you connected via USB/Firewire/IDE or other interfaces/ports
> etc. some new devices?
>    4. have you installed new BIOS?
>    5. is your RAM ok?
>    6. are you sure there is no CD/DVD in your CD/DVD drive?
>    7. are you sure there is no floppy disk in your floppy drive?
>    8. are you sure your CPU/motherboard/RAM is not overheating?
>
> Claudio
> --
> http://mail.python.org/mailman/listinfo/python-list
>

So what exactly does the loop do? Try running the loop without sleep and
then see how long that takes.

--



-Ivan
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From __peter__ at web.de  Sun Feb 12 10:59:58 2006
From: __peter__ at web.de (Peter Otten)
Date: Sun, 12 Feb 2006 16:59:58 +0100
Subject: appending to a list via properties
References: <1139605443.823899.141260@g47g2000cwa.googlegroups.com>
	<1139670699.632590.148760@g14g2000cwa.googlegroups.com>
	<1hal7v6.1pa7ijfg3np46N%aleaxit@yahoo.com>
Message-ID: <dsnluu$es5$01$1@news.t-online.com>

[Alex Martelli]

> If you want to hoist for performance, you can hoist more:
> 
> appenders = foo.append, qux.append
> while some_condition:
>     for appender, anitem in zip(appenders, calculate_something()):
>         appender(anitem)

You are of course claiming a performance improvement over Carl's variant,
but looking back into the initial post

[Lonnie Princehouse]

>     foo = []
>     qux = []
> 
>     while some_condition:
>        a, b = calculate_something()
>        foo.append(a)
>        qux.append(b)

the original code looks like yours with the inner loop unrolled - a classic
measure for performance improvement. 

$ python -m timeit -s'ext = [].extend, [].extend' -s'def calc(): return (),
()' 'for ix, i in zip(ext, calc()): ix(i)'
100000 loops, best of 3: 2.79 usec per loop

$ python -m timeit -s'ax = [].extend; bx = [].extend' -s'def calc(): return
(), ()' 'a, b = calc(); ax(a); bx(b)'
1000000 loops, best of 3: 0.975 usec per loop

(I used extend instead of append() to avoid the effects of memory hogging)

I find the faster code more readable than yours - and Lonnie's cool hack -
so I'd leave it at that.

Peter



From martin at v.loewis.de  Thu Feb  9 11:51:54 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Thu, 09 Feb 2006 17:51:54 +0100
Subject: cursesw+setlocale fixes it!
In-Reply-To: <mailman.1662.1139495909.27775.python-list@python.org>
References: <mailman.1566.1139345769.27775.python-list@python.org>	<43E9234B.6030108@v.loewis.de>
	<11ujl0hof3fql62@corp.supernews.com>	<mailman.1617.1139425534.27775.python-list@python.org>	<43EA6238.6040004@v.loewis.de>	<mailman.1631.1139438813.27775.python-list@python.org>	<1139446935.221566.287710@g43g2000cwa.googlegroups.com>
	<mailman.1662.1139495909.27775.python-list@python.org>
Message-ID: <43EB732A.2020202@v.loewis.de>

Ian Ward wrote:
> Hey, that works for me.  Combined characters and wide characters are
> working too.
> 
> Now the real problem.. how do I convince the python higher-ups to link
> against cursesw by default?

That's very easy. Contribute a working patch. That patch should support
all possible situations (e.g. curses is ncurses, and ncursesw is
available, curses is ncurses, and ncursesw is not available, curses
is not ncurses), and submit that patch to sf.net/projects/python.

Regards,
Martin


From rupole at hotmail.com  Tue Feb 14 18:27:39 2006
From: rupole at hotmail.com (Roger Upole)
Date: Tue, 14 Feb 2006 18:27:39 -0500
Subject: Embedding an Application in a Web browser
References: <1139930045.408507.151440@g43g2000cwa.googlegroups.com>
	<1139932108.356041.155100@g14g2000cwa.googlegroups.com>
	<1139932674.447510.213520@o13g2000cwo.googlegroups.com>
	<1139944525.979980.132740@o13g2000cwo.googlegroups.com>
Message-ID: <1139959702_9639@sp6iad.superfeed.net>

Using the Pywin32 extensions
( http://sourceforge.net/projects/pywin32/ ) ,
 you can register Python as an Active Scripting language.
Then it can be used anywhere javascript or vbscript are
used, in IE, ASP, etc.  It should only be used in IE
for trusted applications, however.

        Roger

"rodmc" <userprogoogle-139 at yahoo.co.uk> wrote in message news:1139944525.979980.132740 at o13g2000cwo.googlegroups.com...
> Thanks for all the comments.
>
> I will elaborate slightly to give everyone an idea of what is going on.
> Basically I need to create a dynamic visualisation which sits in the
> active desktop, basically behind the desktop icons and in front of the
> windows wallpaper. Windows lets you define a web page which can be
> displayed in this way. The application itself can sit on the local
> users computer, rather than actually being downloaded via the web. It
> will be retrieving data from a variety of sources. If there is another
> way to do it then that would be good, for example writing another
> active desktop application which people can use.
>
> The user has to be able to resize, move or get rid of the visualisation
> if they wish to do so.
>
> Best,
>
> rod
> 




----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! >100,000 Newsgroups
---= East/West-Coast Server Farms - Total Privacy via Encryption =---


From dausha at gmail.com  Wed Feb  8 18:01:34 2006
From: dausha at gmail.com (Ben Wilson)
Date: 8 Feb 2006 15:01:34 -0800
Subject: Ternary Operator Now?
Message-ID: <1139439694.312028.145280@g43g2000cwa.googlegroups.com>

I read somewhere else that Python was getting a ternary operator (e.g.
x = (true/false) ? y : z). I read the PEP about it and that the PEP had
been approved this past Fall. Has this been released into the wild yet?

IIRC, the operator is like:

x = y if C : else z



From kp87 at lycos.com  Wed Feb  8 22:49:09 2006
From: kp87 at lycos.com (kp87 at lycos.com)
Date: 8 Feb 2006 19:49:09 -0800
Subject: random playing soundfiles according to rating.
Message-ID: <1139456949.087347.173800@o13g2000cwo.googlegroups.com>


I am a little bit stuck ....

I want to play a bunch of soundfiles randomly, but i want to give each
soundfile a rating (say 0-100) and have the likelihood that the file be
chosen be tied to its rating so that the higher the rating the more
likely a file is to be chosen.  Then i need some additional flags for
repetition, and some other business. I am guessing a dictionary would
be a great way to do this, with the key being the soundfile name and
the values being my ratings and other flags & associated data.

#soundfile name : [rating, %chance it will repeat/loop]
sfiles = { ("sf001") : [85, 15],
     ("sf002") : [25, 75],
     ("sf003") : [95, 45],
     ("sf004") : [35, 95] }


But i am stuck on how to do a random chooser that works according to my
idea of choosing according to rating system. It seems to me to be a bit
different that just choosing a weighted choice like so:

def windex(lst):
	'''an attempt to make a random.choose() function that makes weighted
choices

	accepts a list of tuples with the item and probability as a pair
	like: >>> x = [('one', 0.25), ('two', 0.25), ('three', 0.5)]
	>>> y=windex(x)'''
	n = random.uniform(0, 1)
	for item, weight in lst:
		if n < weight:
			break
		n = n - weight
	return item


And i am not sure i want to have to go through what will be hundreds of
sound files and scale their ratings by hand so that they all add up to
100%. I just want to have a long list that i can add too whenever i
want, and assign it a grade/rating according to my whims!

cheers,

-kp---



From thorsten at thorstenkampe.de  Tue Feb 14 08:33:17 2006
From: thorsten at thorstenkampe.de (Thorsten Kampe)
Date: Tue, 14 Feb 2006 13:33:17 +0000
Subject: Cygwin IDLE has no menu bar
References: <mailman.1878.1139890464.27775.python-list@python.org>
Message-ID: <un1r9w8bmx8h.lnl7f81kydg$.dlg@40tude.net>

* Steve Holden (2006-02-14 04:14 +0100)
> I just wondered whether anyone has seen this problem and fixed it. An
> IDLE with no menu bar isn't much use ...

It's not fixed but the workaround is "idle -n"


From beliavsky at aol.com  Wed Feb 15 15:35:46 2006
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 15 Feb 2006 12:35:46 -0800
Subject: Python advocacy in scientific computation
References: <1139937227.379829.215090@z14g2000cwz.googlegroups.com>
Message-ID: <1140035746.327099.39110@g43g2000cwa.googlegroups.com>

I have posted your essay in a thread "Python for Fortran programmers"
in comp.lang.fortran since it is written in part for a Fortran
audience, and since you are more likely to get critical (but hopefully
constructive) comments there.



From keith.b.perry at gmail.com  Tue Feb 21 10:01:48 2006
From: keith.b.perry at gmail.com (kbperry)
Date: 21 Feb 2006 07:01:48 -0800
Subject: Zope 3?? How do you start it on Windows?
In-Reply-To: <43fadafe$0$38624$edfadb0f@dread12.news.tele.dk>
References: <1140496495.019513.161010@z14g2000cwz.googlegroups.com>
	<43fadafe$0$38624$edfadb0f@dread12.news.tele.dk>
Message-ID: <1140532195.134688.57960@g43g2000cwa.googlegroups.com>

Cool thx Matt.  I did finally figure it out, but barely.  Why would you
want to download and install Zope without creating an instance?  It
seems kind of dumb to me.



From mwilson-to at sympatico.ca  Tue Feb 28 20:07:51 2006
From: mwilson-to at sympatico.ca (Mel Wilson)
Date: Tue, 28 Feb 2006 20:07:51 -0500
Subject: type = "instance" instead of "dict"
In-Reply-To: <du2ikn$spb$1@daisy.noc.ucla.edu>
References: <1141069989.763239.191140@u72g2000cwu.googlegroups.com>	<du0nie$egt$1@daisy.noc.ucla.edu>
	<mailman.2501.1141112430.27775.python-list@python.org>
	<du2ikn$spb$1@daisy.noc.ucla.edu>
Message-ID: <lv6Nf.3242$RM2.330144@news20.bellglobal.com>

James Stroud wrote:
> Fredrik Lundh wrote:
> 
>> James Stroud wrote:
>>
>>
>>> Perhaps you did not know that you can inheret directly from dict, which
>>> is the same as {}. For instance:
>>>
>>> class Dict({}):
>>>   pass
> 
> 
> I must have been hallucinating. I swear I did this before and it worked 
> just like class Dict(dict). Since it doesn't read as well, I've never 
> used it.
> 
>>

class D (type({})):
     '''This derivative of dictionary works.'''

Could that have been it?

         Mel.


From justsee at gmail.com  Wed Feb 15 04:36:56 2006
From: justsee at gmail.com (justsee at gmail.com)
Date: 15 Feb 2006 01:36:56 -0800
Subject: Downloading files using urllib in a for loop?
Message-ID: <1139996216.765104.119260@g14g2000cwa.googlegroups.com>

Hi,
 I'm using Python 2.3 on Windows for the first time, and am doing
something wrong in using urllib to retrieve images from urls embedded
in a csv file. If I explicitly specify a url and image name it works
fine(commented example in the code), but if I pass in variables in this
for loop it throws errors:

--- The script:

import csv, urllib
reader = csv.reader(open("source.csv"))
for x,y,z,imagepath in reader
  theurl = imagepath[:55]
  theimage = imagepath[55:-8]
  urllib.urlretrieve(theurl, theimage)
  #urllib.urlretrieve("http://someurl/image.gif", "image.gif") # works!

--- The errors:

This throws the following errors:
  File "getimages.py", line 9, in ?
    urllib.urlretrieve(theurl,theimage)
  File "C:\Python23\lib\urllib.py", line 83, in urlretrieve
    return _urlopener.retrieve(url, filename, reporthook, data)
  File "C:\Python23\lib\urllib.py", line 213, in retrieve
    fp = self.open(url, data)
  File "C:\Python23\lib\urllib.py", line 181, in open
    return getattr(self, name)(url)
  File "C:\Python23\lib\urllib.py", line 410, in open_file
    return self.open_local_file(url)
  File "C:\Python23\lib\urllib.py", line 420, in open_local_file
    raise IOError(e.errno, e.strerror, e.filename)
IOError: [Errno 2] No such file or directory: ''

---

Would really appreciate some pointers on the right way to loop through
and retrieve images, as I've tried various other solutions but am
clearly missing something simple!

Thanks,

justin.



From peter at engcorp.com  Fri Feb 10 16:55:21 2006
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 10 Feb 2006 16:55:21 -0500
Subject: installing python on a server?
In-Reply-To: <PB6Hf.1596$No6.37972@news.tufts.edu>
References: <PB6Hf.1596$No6.37972@news.tufts.edu>
Message-ID: <dsj24c$1p8$1@sea.gmane.org>

John Salerno wrote:
> Can anyone tell me how complicated it might be to install Python on my 
> server so I can use it for web apps? Is it a one-time process, or 
> something to maintain?

I'm not sure what you would expect to maintain.  Do you expect some kind 
of "bit-rot" to occur, requiring you to periodically rewrite files 
in-place to refresh them (ala "core memory" of ages past)?  ;-)

Generally speaking one needs to maintain software only to upgrade or 
reconfigure it (e.g. adding a new package that you'd like to start using 
in your web apps).

-Peter



From mooquack at suad.org  Wed Feb  1 22:57:58 2006
From: mooquack at suad.org (Kirk McDonald)
Date: Wed, 01 Feb 2006 19:57:58 -0800
Subject: nDimensional sparse histogram in python.
In-Reply-To: <1138852458.567178.116980@g43g2000cwa.googlegroups.com>
References: <1138848672.791908.90050@g44g2000cwa.googlegroups.com>
	<1ha3gff.u4comocxo4ddN%aleaxit@yahoo.com>
	<1138849589.663600.301610@z14g2000cwz.googlegroups.com>
	<1ha3hrb.z9fahb1cxs03zN%aleaxit@yahoo.com>
	<1138852458.567178.116980@g43g2000cwa.googlegroups.com>
Message-ID: <43e18249$1@nntp0.pdx.net>

KraftDiner wrote:
> Ok so this is nice.. Just one thing.. When you try to get a value from
> a dictionary
> and it isn't found in the dictionary things go bad...
> 
> Take this for example:
> 
> class histogram(object):
> 	def __init__(self):
> 		self.histo = {}
> 
> 	def update(self, point):
> 		if self.histo.get(point) != None:
> 			self.histo[point] = self.histo[point] + 1
> 		else:
> 			self.histo[point] = 1
> 
> 	def get(self, point):
> 		return self.histo[point]
> 
> 
> hist = histogram()
> hist.update((0,0,0))
> hist.update((0,0,1))
> hist.update((0,0,1))
> hist.get((0,0,0))
> hist.get((0,0,1))
> hist.get((0,0,2))
> 
> spews out this error:
> 
> Traceback (most recent call last):
>   File "histogram.py", line 21, in ?
>     hist.get((0,0,2))
>   File "histogram.py", line 12, in get
>     return self.histo[point]
> KeyError: (0, 0, 2)
> 

Try this:

class histogram(object):
	def __init__(self):
		self.histo = {}

	def update(self, point):
		self.histo[point] = self.histo.get(point, 0) + 1

	def get(self, point):
		return self.histo.get(point, 0)

dict.get's default return value is your friend.

-Kirk McDonald


From bearophileHUGS at lycos.com  Wed Feb 22 09:22:02 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 22 Feb 2006 06:22:02 -0800
Subject: With pyMinGW
References: <1140565378.921287.177380@g44g2000cwa.googlegroups.com>
	<1140609645.670997.49670@g44g2000cwa.googlegroups.com>
Message-ID: <1140618122.150419.133470@o13g2000cwo.googlegroups.com>

Thank you for your answers, Khalid.

> It seems you may be using an old version of pyMinGW,

I have downloaded it yesterday from your site.


> the relevant part dealing with include directories in zlib.mak
> should read now as follows:

I have checked, and that relevant part is the same in my zlib.mak.


> but since the site stopped the hosting of zip files and since many
> people do not download that particular file anyway when it was hosted
> elsewhere, letting the file expire (inactive files are removed after
> one week from last download), then I hope you'd agree it would be much
> work for me to keep track of expired and unexpired files and so keep on
> uploading the files.

You can probably remove the dead link from your page.
(Maybe I can build a complete package (with Tkinter, minGW and Swig
too), and put it in some official Python site.)


> As to your SWIG problem, then I suggest you look into the pyMinGW's
> extensions' directory. There you will find two examples of building C
> and CPP extensions using SWIG and MinGW.

I don't want to use/waste too much of your time, I have succed with the
C++ example, but the C example has given me some problems:

C:\...\PyminGW\Python-2.4.2\MinGW\Extensions\pyExt_C_exmaple>python24
setupMingW.py build --compile
r=mingw32
running build
running build_ext
building '_example' extension
swigging example.i to example_wrap.c
C:\...\PyminGW\swigwin-1.3.28\swig.exe -python -o example_wrap.c
example.i
C:\......\bin\gcc.exe -mno-cygwin -mdll -O2 -Wall -s
-IC:\...\PyminGW\Python-2.4
.2\include -IC:\...\PyminGW\Python-2.4.2\PC -c example_wrap.c -o
build\temp.win32-2.4\Release\examp
le_wrap.o
example_wrap.c: In function `PySwigClientData_New':
example_wrap.c:1205: warning: dereferencing type-punned pointer will
break strict-aliasing rules
example_wrap.c: In function `PySwigObject_own':
example_wrap.c:1456: warning: dereferencing type-punned pointer will
break strict-aliasing rules
example_wrap.c:1456: warning: dereferencing type-punned pointer will
break strict-aliasing rules
example_wrap.c: In function `My_variable_set':
example_wrap.c:2515: error: `My_variable' undeclared (first use in this
function)

Bye,
bearophile



From grante at visi.com  Wed Feb  8 11:14:34 2006
From: grante at visi.com (Grant Edwards)
Date: Wed, 08 Feb 2006 16:14:34 -0000
Subject: Best way of finding terminal width/height?
References: <96nFf.43896$d5.199922@newsb.telia.net>
	<11uc3dohfitotc5@corp.supernews.com>
	<jysFf.155352$dP1.513537@newsc.telia.net>
	<11udc0r2bq11042@corp.supernews.com> <43E719EE.3040401@gmail.com>
	<11ueq4nhn91qm91@corp.supernews.com> <43E8659D.6010101@gmail.com>
	<11uhcjj2p10mm0d@corp.supernews.com> <43E8D4DD.7040904@gmail.com>
	<11uhodjciifej02@corp.supernews.com>
	<dscfcv$t5i$1@news.lysator.liu.se>
Message-ID: <11uk67a4ao5efe6@corp.supernews.com>

On 2006-02-08, Joel Hedlund <joel.hedlund at gmail.com> wrote:

>> sys.stdin.read() will return when ... the
>> underyling read() call is aborted by a signal.
>
> Not "return", really?

Yes, really.  On a SIGWINCH, the read() will _either_ return
currently buffered data or thrown an IOError exception.  You
need to handle either one.

> Won't it just pass an exception?

That seems to be the behavior if there is no buffered data to
return. 

> I thought that was what I was catching with the "except
> IOError" part there? I assumed that sys.stdin.read() would
> only return a value properly at EOF?

That assumption seems to be wrong.  sys.stdin.read() also
returns w/o an exception if there's buffered data and a
SIGWINCH occurs.  Whether that is "proper" or not, I don't
know, but that's what it does.

Hmm, here's what the library reference says about file object's
read() method:

  read([size]) 

    Read at most size bytes from the file (less if the read
    hits EOF before obtaining size bytes). If the size argument
    is negative or omitted, read all data until EOF is reached.
    The bytes are returned as a string object. An empty string
    is returned when EOF is encountered immediately. (For
    certain files, like ttys, it makes sense to continue
    reading after an EOF is hit.) Note that this method may
    call the underlying C function fread() more than once in an
    effort to acquire as close to size bytes as possible. Also
    note that when in non-blocking mode, less data than what
    was requested may be returned, even if no size parameter
    was given.

There appear to be a couple problems with this description:

 1) It says that read() in blocking mode without a size
    parameter it will read until EOF.  This is not what happens
    when reading a terminal that receives SIGWINCH, so you're
    right: read() it isn't working as described.

 2) It also says that it makes sense to continue to read a tty
    after you get an EOF.  That's not true.  Once you get an
    EOF on a tty, there's no point in reading it any more:
    you'll continue to get an EOF forever.
    
> It looks to me as if sys.stderr.read() really gets an EOF at
> the final linebreak fed into the terminal prior to window size
> change, because the final unterminated line shows up on my
> shell prompt.

Python's read() (which seems to call fread()) didn't get an EOF
from fread(), it got an error from fread() because the C read()
call that was made by fread() returned an error because it was
interrupted by a signal.

In Python, EOF is when read() returns '' (the empty string).

> Like so:
>
> $ python winch.py
> moo moo
> cow cowmoo moo
> $ cow cow
>
> In this example I type moo moo[ENTER]cow cow on my keyboard
> and then resize the window.
>
> Now that EOF has to come from somewhere

There was no EOF.  read() returned because of the signal, not
because of an EOF.

> (since there's no
> IOError or other exception, or the program wouldn't terminate
> nicely with nothing on stderr) and I'd like to point the blame
> at the terminal. Or is there something really fishy inside
> sys.stdin.read() or signal that puts EOFs into streams?
>
> But anyway, as long as this behavior only shows up on
> interactive operation, the user will likely spot it anyway and
> can react to it. So I think this code would be pretty safe to
> use. What do you think?
>
>> Resign the terminal will abort pending I/O operations on
>> that terminal.  It won't terminal I/O operations pending on
>> other devices/files.
>
> What do you mean by "abort"? I can accept that "aborting" may
> lead to raising of IOError (which we can catch and retry), but
> not to arbitrary insertion of EOFs into streams (which we
> cannot distinguish from the real deal coming from the user).

It didn't insert an EOF, it just caused read() to return
"prematurely".  You should call read() again until it receives
a _real_ EOF and returns ''.  Take another look at my example:

#!/usr/bin/python
import signal, os, sys

_bTerminalSizeChanged = False

def report_terminal_size_change(signum, frame):
    global _bTerminalSizeChanged
    _bTerminalSizeChanged = True

signal.signal(signal.SIGWINCH, report_terminal_size_change)

while True:
    try:
        s = sys.stdin.read()
        if not s:
            sys.stderr.write("EOF\n")
            break
        sys.stdout.write(s)
    except IOError:
        sys.stderr.write("IOError\n")
    if _bTerminalSizeChanged:
        sys.stderr.write("SIGWINCH\n")
        _bTerminalSizeChanged = False



-- 
Grant Edwards                   grante             Yow!  Yow! It's a hole
                                  at               all the way to downtown
                               visi.com            Burbank!


From michele.petrazzo at TOGLIunipex.it  Fri Feb 24 12:44:10 2006
From: michele.petrazzo at TOGLIunipex.it (Michele Petrazzo)
Date: Fri, 24 Feb 2006 18:44:10 +0100
Subject: Exception not raised
In-Reply-To: <468ttdF9vr9mU1@uni-berlin.de>
References: <43ff3fc8$0$29105$5fc30a8@news.tiscali.it>
	<468ttdF9vr9mU1@uni-berlin.de>
Message-ID: <43ff45e9$0$29105$5fc30a8@news.tiscali.it>

Diez B. Roggisch wrote:
> Not here:
> 
> t_fields = {}
> #code
> def test():
>   print type(t_fields), 11 in t_fields
>   print t_fields[11]
>   print "I'm here"
> 
> print "ok"
> test()
> print "ok"
> #end code
> 
> Gives me 
> 
> KeyError: 11

Also on my environ when I try this 4 line code. My project, where that 
strangeness happen has 500/600 + K of code.

> 
> 
> So - whatever you do, there must be some other code capturing that
> exception. 

This code are inside a method into class that have no try/except. And 
called from a method inside a wx.Frame derivate. The other strange thing 
is that if I try the same code just before the "caller" to that method, 
it raise an exception:

#code extract alway from the big project:

class errorHappen(object):
  def methodError(self, t_fields):
   print type(t_fields), 11 in t_fields
   print t_fields[11]
   print "I'm here"


def myF(wx.Frame):
   .... init ....
  self._e = errorHappen()

def caller(self):
  d = dict(dictionary with 50/100 keys)
  #if here I try d[11], I'll KeyError
  self._e.methodError(d) #here I don't see the exeception


>Maybe you don't use dict, but a subclass of it?

All my dict are created as
d = dict()

and populate by: d.update(other_dict) or for k, val in iter: d[k] = val

> 
> Diez


Thanks,
Michele


From amorgan at xenon.Stanford.EDU  Wed Feb  1 16:29:12 2006
From: amorgan at xenon.Stanford.EDU (Alan Morgan)
Date: Wed, 1 Feb 2006 13:29:12 -0800 (PST)
Subject: How do I dynamically create functions without lambda?
References: <1138389517.896043.7450@g47g2000cwa.googlegroups.com>
	<pan.2006.01.28.00.35.06.174939@REMOVETHIScyber.com.au>
	<1138436008.628882.126510@g44g2000cwa.googlegroups.com>
	<pan.2006.01.28.12.02.34.293286@REMOVETHIScyber.com.au>
Message-ID: <drr978$oat$1@xenon.Stanford.EDU>

In article <pan.2006.01.28.12.02.34.293286 at REMOVETHIScyber.com.au>,
Steven D'Aprano  <steve at REMOVETHIScyber.com.au> wrote:
>On Sat, 28 Jan 2006 00:13:28 -0800, Kay Schluehr wrote:
>
>[snip lambda calculus stuff]
>
>> In Python you can write:
>> 
>> Y = lambda g: (lambda f: g(lambda arg: f(f)(arg))) (lambda f: g(lambda
>> arg: f(f)(arg)))
>> 
>> This serves the purpose. Try Y(F) and see.
>
>
>Is any of this stuff maintainable in the real world of IT, where
>most programmers don't have computer science degrees? You come along six
>months after the project was finished to maintain this code and discover
>that the whiz-kid lambda calculus guy never commented anything because
>that would detract from the elegance of his one liners; what happens next?

Excessive cleverness can lead to unmaintainable code.  So can excessive stupidity.
Since there are a lot more stupid people than clever people out there I think
the more likely scenario is having to maintain unmaintainable code written by a
complete idiot whose programming knowledge comes solely from books whose titles
end with "In 7 Days". 

Oh, and I'd hope that code reviews, etc. would have kept lambda-boy from getting
too far down this path of self invocation.

Alan
-- 
Defendit numerus


From steve at holdenweb.com  Mon Feb 13 11:03:55 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Feb 2006 11:03:55 -0500
Subject: Rethinking the Python tutorial
In-Reply-To: <dsq3ta$bne$1@wake.carmen.se>
References: <dsfqv4$shc$1@wake.carmen.se>	<mailman.1721.1139586567.27775.python-list@python.org>
	<dsq3ta$bne$1@wake.carmen.se>
Message-ID: <43F0ADEB.6030807@holdenweb.com>

Magnus Lycka wrote:
> Ed Singleton wrote:
> 
>>How about putting the current tutorial into the wiki and seeing if
>>people start updating it?  I'm not saying it would work, but it might
>>have interesting effects...
> 
> 
> There are abviously a lot of ideas in the air concerning on-line
> editing of the new python web site, support for user comments in
> the docs etc. I hope some of these things will be deployed soon.
> 
You and me both!

> Concerning the tutorial, I just felt that the two I mentioned are
> the "best of breed", and it might be smarter to give them official
> status. I don't see any value in maintaining Guido's tutorial for
> all eternity. It's not as if we need backward compatibility in the
> tutorial department... I suppose there are some gaps in A Byte Of
> Python that needs to be filled. For instance, the discussion on
> Unicode seems very thin. I still think it's a better starting point
> for the ideal beginners tutorial than the old official tutorial.
> 
As with all such content, the first thing you will need is a band of 
volunteers dedicated to keeping the content up to date, both proactively 
and in response to reader comments.

This is a far from easy step.

> I still feel it's a better beginner's tutorial though. Last time I
> suggested the standard Python tutorial to someone, she dropped
> Python almost at once, since she got the impression that it was
> some kind of calculator program, and she wasn't looking for that.
> 
Yes, I think many people would agree that the existing tutorial is a 
little slanted towards people who are already familiar with programming, 
and sometimes programming in the Linux/Unix environment.

> I think there are a lot of potential improvements for Python docs.
> The Language Reference is unreadable for mortals, and that means
> that there is no standard reference document describing the real
> fundamentals in Python, statements and operators. we just have the
> tutorial for that.
> 
> The best resource in the Python docs is that Library Reference.
> As far as I understand, it's not complete, and it could contain
> more examples in places, but it's very useful.
> 
> The Lanugage Reference seems more like some kind of specification.

That's exactly what it's supposed to be: guidance for implementers.

> I think a *real* Python Language Guide would be great, and it could
> still be a fairly short document, even if core Python has grown a
> bit in recent versions. The builtins chapter in the Library Reference
> (Ch 2) belongs here, and the Std Lib Ref is just for things  we
> import. It's really strange to document e.g. string literals and the
> string class in different manuals.
> 
What we are talking about here is a Python Language Users' Guide.

> I was thinking that maybe some old paper book on Python could be
> donated for this purpose, but now it seems that most of the good
> ones are going to be reprinted soon, if they aren't already in the
> stores. I'm really happy that they are still commercially viable,
> but it would have been great if we had gotten one of these goodies
> as a starting point. It's hard work to write such good books as
> e.g. Martelli and Beazley did.
> 
> Of the good books, I just have Beazley's "Python Essential Reference"
> 1st Ed. nearby, but chapter 2-10 in that shows very well what I
> think a Python Language Guide could look like.
> 
> BTW... Alex is now employed by a very rich and successful company
> that really owes the Python community a lot of gratitude. It's great
> that they are paying the salaries for some of the very best Python
> people, and let them work some for the community, but perhaps Google
> could buy the rights for "Python in a Nutshell" from Martelli/O'Reilly
> and donate it do the community? :)

Google are very active supporters of Python already, though they don't 
make a big song and dance about it. You might notice, for example, that 
they are a Platinum Sponsor at PyCon this year, as well as being a 
sponsor member of the PSF. The Summer of Code also benefited Python in 
several ways.

There are older-established companies with more Python programmers who 
have made hardly any community contribution - the "takers" of the open 
source world. I wouldn't like Google to think that the Python community 
isn't recognizing their support.

You might also like to ask Alex what he'd feel about losing the 
"Nutshell" revenue stream!

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From john at totalrekall.co.uk  Mon Feb  6 08:56:20 2006
From: john at totalrekall.co.uk (John Dean)
Date: Mon, 6 Feb 2006 13:56:20 GMT
Subject: Python V2.4.2 source code
References: <43e710de$0$23286$db0fefd9@news.zen.co.uk><mailman.1471.1139217340.27775.python-list@python.org>
	<mailman.1479.1139224778.27775.python-list@python.org>
Message-ID: <43e7540c$0$5003$db0fefd9@news.zen.co.uk>

Hi
Thank you very much. It seems the version tar that is embedded in WinRAR is
broken. It gets as far as the Mac directory and then bombs out. The version
of tar that is bundled with CygWin worked just fine

-- 
Best Regards
John


From tdwdotnet at gmail.com  Fri Feb 24 08:27:43 2006
From: tdwdotnet at gmail.com (Tim Williams (gmail))
Date: Fri, 24 Feb 2006 13:27:43 +0000
Subject: problem(s) with import from parent dir: "from ../brave.py import
	sir_robin"
In-Reply-To: <G34885256.49.3450.1@mx-extra.net>
References: <G34885256.49.3450.1@mx-extra.net>
Message-ID: <9afea2ac0602240527o19997e84u@mail.gmail.com>

On 24 Feb 2006 05:10:37 -0800, per9000 <per9000 at gmail.com> wrote:
>
>
> SHORT VERSION:
>
> I tried three variants of "from ../brave.py import sir_robin", one
> works. I want to use it in a py-file to execute command-line-style and
> that does not work.
>
> Can someone please give me, not a bucket with the desert(s) on top, but
> just the thin chocolate?
>
>
Add the absolute path to a file called python.pth in your c:\python2x
directory
using the format:

C:\my\holy\py_scripts (newline)
for *each* directory and subdirectory

Then simply import the module as normal

>>>from raw2nice_def import raw2nice

HTH :)
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20060224/9b46de0b/attachment.html>

From bgporter at acm.org  Wed Feb 15 09:36:15 2006
From: bgporter at acm.org (Brett g Porter)
Date: Wed, 15 Feb 2006 09:36:15 -0500
Subject: How to *Search* with google from inside my programme and get
	the	search result?
In-Reply-To: <1139976767.616343.168380@f14g2000cwb.googlegroups.com>
References: <mailman.1933.1139969478.27775.python-list@python.org>
	<1139976767.616343.168380@f14g2000cwb.googlegroups.com>
Message-ID: <43F33C5F.10003@acm.org>

I V wrote:
> Frank Potter wrote:
>> Does google supply some webservice to programmers? I did see
> 
> Googling for "google api" gets you to:
> 
> http://www.google.com/apis/
> 
> It appears to be a SOAP API, which you can access with python, but I
> think you'll need a third-party library. Googling for "python soap"
> gets you:
> 
> http://www-128.ibm.com/developerworks/library/ws-pyth5/
> 
> which might be a place to start.
> 
Or even easier:
http://pygoogle.sourceforge.net/

SUMMARY
-------
This module allows you to access Google's web APIs through SOAP,
to do things like search Google and get the results programmatically.
This API is described here:
   http://www.google.com/apis/

SYSTEM REQUIREMENTS
-------------------
Requires Python 2.0 or later

Requires the SOAPpy library from the Python Web Services project
(http://pywebsvcs.sourceforge.net).  We include an older version, but
its use is now deprecated (and will go away completely in future
releases).  Unfortunately, versions of SOAPpy prior to 0.11.3 will not
work correctly, and thus PyGoogle will fall back on the included
SOAP.py library if an earlier version is found.

// BgP


From franz.steinhaeusler at gmx.at  Mon Feb 27 04:46:48 2006
From: franz.steinhaeusler at gmx.at (Franz Steinhaeusler)
Date: Mon, 27 Feb 2006 10:46:48 +0100
Subject: regular expresson for Unix and Dos Lineendings wanted
References: <jterv157550g4qd4rosc3a2o8l69gcau8v@4ax.com>
	<mailman.2346.1140703308.27775.python-list@python.org>
	<ujgrv19d4thh28cvh4emqi2m1p5g1gofuh@4ax.com>
	<Lvr*nu8-q@news.chiark.greenend.org.uk>
Message-ID: <ohi5029tm8k2l56dfjhm2k5siv7o4bb1tm@4ax.com>

On 24 Feb 2006 14:12:05 +0000 (GMT), Sion Arrowsmith
<siona at chiark.greenend.org.uk> wrote:

>Franz Steinhaeusler  <franz.steinhaeusler at gmx.at> wrote:
>>On Thu, 23 Feb 2006 13:54:50 +0000, Martin Franklin
>>>why not use string methods strip, rstrip and lstrip
>>because this removes only the last spaces,
>> [given r = 'erewr    \r\nafjdskl     ']
>>I want:
>>'erewr\r\nafjdskl'
>
>os.linesep.join(l.rstrip() for l in r.split(os.linesep))

Hello Sion,

thank you, your solution, I like most!!
(it is clean und one don't have to use re's).
-- 
Franz Steinhaeusler


From erniedude at gmail.com  Fri Feb  3 16:51:34 2006
From: erniedude at gmail.com (Ernesto)
Date: 3 Feb 2006 13:51:34 -0800
Subject: Run Windows shortcut
In-Reply-To: <1139000903.156530.212100@g14g2000cwa.googlegroups.com>
References: <1139000903.156530.212100@g14g2000cwa.googlegroups.com>
Message-ID: <1139003494.145957.130100@g44g2000cwa.googlegroups.com>

Nevermind....   this is not the design I need.



From gene.tani at gmail.com  Thu Feb 16 13:57:50 2006
From: gene.tani at gmail.com (gene tani)
Date: 16 Feb 2006 10:57:50 -0800
Subject: Safe Python Execution
In-Reply-To: <mailman.2020.1140111870.27775.python-list@python.org>
References: <1haudyd.10d1fd6nn4pqhN%aleaxit@yahoo.com>
	<mailman.2020.1140111870.27775.python-list@python.org>
Message-ID: <1140116270.222360.134430@z14g2000cwz.googlegroups.com>


Jean-Paul Calderone wrote:
> On Thu, 16 Feb 2006 07:59:03 -0800, Alex Martelli <aleaxit at yahoo.com> wrote:
> >Graham <graham.abbott at gmail.com> wrote:
> >
> >> I've been messing around with trying to get a small sandbox like
> >> environment where i could execute python code in a "safe" way.
> >> Basically what the old restricted execution module attempted to do.
> >> I've written a small amount of code to get custom interpreter running,
> >> but i'm not really sure if its safe.
> >>
> >> The way i'm controlling functionality is with some games and exec, so
> >> if 'code' was the text code you wanted to execute i run:
> >>
> >> exec code in {'__builtins__':None"}
> >>
> >> obviously this doesn't give you much to play with, but it does remove
> >> file access and importing as far as i can tell. Can anyone think of a
> >> hack around this? I assume if it was this easy it would be a module
> >> already but i figured i would ask.
> >
> >I suggest compiling the code and examining the names used in the code
> >object (co_names attribute of the code object which compile returns) --
> >refuse to execute the code if it mentions, defines or uses any special
> >name (starting and ending with two underscores).  That, plus removing
> >almost all builtins as you do here, should be a good start.
>
> A good start, perhaps, but still in need of a good finish.
>
>     """
>     exec 'print ' + ''.join(map(chr, [
>         95, 95, 98, 117, 105, 108, 116, 105, 110, 115, 95, 95]))
>     """
>
> You can come up with a long list of restrictions to impose, and maybe that will be good enough.  But making it /perfect/ is a Herculean task, as is maintaining it as new Python releases are made, and auditing it every time you add a new piece of code to your system.
>

What about what's in zope, :
http://svn.zope.org/Zope3/trunk/src/zope/security/untrustedinterpreter.txt?view=auto



From tdelaney at avaya.com  Tue Feb  7 21:58:13 2006
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Wed, 8 Feb 2006 13:58:13 +1100
Subject: module with __call__ defined is not callable?
Message-ID: <2773CAC687FD5F4689F526998C7E4E5F4DB920@au3010avexu1.global.avaya.com>

adam johnson wrote:

> Hi All.
> I was wondering why defining a __call__ attribute for a module
> doesn't make it actually callable. 

For the same reason that the following doesn't work

    class A (object):

        def __init__(self):
            self.__call__ = A.hello

        def hello (self):
            print 'Hello, world!'

    a = A()
    a()

    Traceback (most recent call last):
      File "D:\Python\modules\testclasscall.py", line 10, in ?
        a()
    TypeError: 'A' object is not callable

The __call__ attribute must be defined on the class (or type) - not on
the instance. A module is an instance of <type 'module'>.

Tim Delaney


From robert.kern at gmail.com  Thu Feb 23 02:18:58 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 23 Feb 2006 01:18:58 -0600
Subject: why don't many test frameworks support file-output?
In-Reply-To: <BAY108-F125E8738194B5113DC85C0CDF20@phx.gbl>
References: <BAY108-F125E8738194B5113DC85C0CDF20@phx.gbl>
Message-ID: <dtjnl3$a26$1@sea.gmane.org>

kanchy kang wrote:
> i browsed the following frameworks briefly: nose, OOBTest,
> testosterone,  py.test, Sancho ... and found out they do support
> imediate screen-output only.

http://testoob.sourceforge.net/features.html

Note the section on XML output. If you need it in a file, then you can use pipes.

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From juho.schultz at helsinki.fi  Tue Feb  7 08:23:16 2006
From: juho.schultz at helsinki.fi (Juho Schultz)
Date: Tue, 07 Feb 2006 15:23:16 +0200
Subject: how to copy a Python object
In-Reply-To: <1139309738.750080.183090@g47g2000cwa.googlegroups.com>
References: <1139301392.205225.48690@o13g2000cwo.googlegroups.com>
	<1139308149.557027.77160@z14g2000cwz.googlegroups.com>
	<1139309738.750080.183090@g47g2000cwa.googlegroups.com>
Message-ID: <dsa704$dn9$1@oravannahka.helsinki.fi>

mitsura at skynet.be wrote:
> Already thanks for the reply,
> 
> but how to write your own copy operator? Won't you always be passing
> referrences to new_obj?
> 

If you need to modify the behaviour of copy or deepcopy, you can give 
your class __copy__ and __deepcopy__ methods. Then copy.copy and 
copy.deepcopy will use these. As a silly example, you could use:

def __copy__(self):
     raise IOError, 'Permission denied.'

http://www.python.org/doc/2.4.2/lib/module-copy.html


From gregpinero at gmail.com  Wed Feb  1 13:45:29 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Wed, 1 Feb 2006 13:45:29 -0500
Subject: urllib2 - My POST Request just isn't working right
In-Reply-To: <XPidnakwb4EddH3eRVny2g@mailbox.co.uk>
References: <312cfe2b0602010753uc363a85wb3f87cf2677993a2@mail.gmail.com>
	<mailman.1317.1138810288.27775.python-list@python.org>
	<1138810726.547315.82890@f14g2000cwb.googlegroups.com>
	<mailman.1318.1138811611.27775.python-list@python.org>
	<XPidnakwb4EddH3eRVny2g@mailbox.co.uk>
Message-ID: <312cfe2b0602011045i2442e9b1x119ee0db96d0b721@mail.gmail.com>

Thanks for all the help guys, it finally worked!  I don't know if I
ever would have figured this out on my own...

skipping the url encoding is what did the trick.  I didn't end up
needing to do anything special for ssl.  I guess urllib2 just handles
that itself.

Thanks again,

-Greg


From reply.in.the.newsgroup at my.address.is.invalid  Sun Feb 19 16:02:44 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Sun, 19 Feb 2006 22:02:44 +0100
Subject: editor for Python on Linux
References: <dtai6e$23m$2@ariane.blic.net>
	<chlhv15ktc4u3adv34sgk63tok5vl9j50q@4ax.com>
	<43f8d9d3$0$3308$636a55ce@news.free.fr>
Message-ID: <v3nhv19n1pjco7pm11u06nomd2j4mr38q2@4ax.com>

F. Petitjean:
>Rene Pijlman:
>> vi
>
>I beg to disagree :-) Use ed
>"Ed is the standard text editor."
>http://www.gnu.org/fun/jokes/ed.msg.html

That was 1991. This is 2006.

-- 
Ren? Pijlman


From fredrik at pythonware.com  Tue Feb  7 19:31:40 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 8 Feb 2006 01:31:40 +0100
Subject: Question about idioms for clearing a list
References: <mailman.1294.1138727665.27775.python-list@python.org><1139231464.914400.37100@g44g2000cwa.googlegroups.com><mailman.1489.1139232969.27775.python-list@python.org><pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au><ds83kd$98m$1@sea.gmane.org><mailman.1510.1139250471.27775.python-list@python.org><43E7F59B.9070009@REMOVEMEcyber.com.au><mailman.1537.1139297533.27775.python-list@python.org><E78Gf.22893$Jd.14515@newssvr25.news.prodigy.net><mailman.1567.1139348019.27775.python-list@python.org>
	<pan.2006.02.07.22.47.40.957502@REMOVETHIScyber.com.au>
Message-ID: <dsbe5e$24d$1@sea.gmane.org>

Steven D'Aprano wrote:

> As for the earlier suggestion that it would be obvious if only I'd done
> the tutorial, if you need to be taught something it is hardly obvious
> is it? Otherwise "obvious" loses all meaning, and we can say any feature,
> no matter how obscure, is obvious if only you'd read the right book, had
> the right teacher, taken the right college degree.

you seem to be missing that we're talking about a programming language
here.  nothing is obvious if you don't know anything about the language;
a lot of things are obvious once you've learned a little about it.  a little is
all it takes.  why is that so hard to understand ?

</F>





From http  Tue Feb  7 16:32:53 2006
From: http (Paul Rubin)
Date: 07 Feb 2006 13:32:53 -0800
Subject: Is Python good for web crawlers?
References: <1139330008.270988.227170@g44g2000cwa.googlegroups.com>
	<7x1wyekj0n.fsf@ruckus.brouhaha.com>
	<dsb3mg$d99$1@apollon.grec.isp.9tel.net>
Message-ID: <7x7j86rh16.fsf@ruckus.brouhaha.com>

Xavier Morel <xavier.morel at masklinn.net> writes:
> BeautifulSoup...
> The API of the package is extremely simple, straightforward and... obvious.

I did not find that.  I spent a few minutes looking at the
documentation and it wasn't obvious at all how to use it.  Maybe I
could have figured it out with more effort, but I got whatever the
immediate task was done without it instead.  It does look like a nice
package but the docs need improvement.


From steve at holdenweb.com  Wed Feb  8 07:14:04 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 08 Feb 2006 07:14:04 -0500
Subject: module with __call__ defined is not callable?
In-Reply-To: <1139394463.255902.168960@f14g2000cwb.googlegroups.com>
References: <mailman.1580.1139367500.27775.python-list@python.org>	<pan.2006.02.08.10.21.24.46790@REMOVETHIScyber.com.au>
	<1139394463.255902.168960@f14g2000cwb.googlegroups.com>
Message-ID: <43E9E08C.4070400@holdenweb.com>

Fuzzyman wrote:
> Steven D'Aprano wrote:
> 
>>On Wed, 08 Feb 2006 13:58:13 +1100, Delaney, Timothy (Tim) wrote:
>>
>>
>>>adam johnson wrote:
>>>
>>>
>>>>Hi All.
>>>>I was wondering why defining a __call__ attribute for a module
>>>>doesn't make it actually callable.
>>>
>>>For the same reason that the following doesn't work
>>
>>[snip example]
>>
>>>The __call__ attribute must be defined on the class (or type) - not on
>>>the instance. A module is an instance of <type 'module'>.
>>
>>That's not a _reason_, it is just a (re-)statement of fact. We know that
>>defining a __call__ method on a module doesn't make it callable. Why not?
>>The answer isn't "because defining a __call__ method on a module or an
>>instance doesn't make it callable", that's just avoiding the question.
>>
>>Someone had to code Python so that it raised an error when you try to call
>>a module object. Is there a reason why module() should not execute
>>module.__call__()? I would have thought that by the duck typing principle,
>>it shouldn't matter whether the object was a class, a module or an int, if
>>it has a __call__ method it should be callable.
>>
> 
> 
> It would nice if you could make modules callable.
> 
Right. While we're at it, why don't we make strings callable. Calling a 
string could call the function whose name (in some namespace or other) 
was in the string. And we can make integers callable too - that could 
just assume that the integer was the address of a function to be called.

In case you think I'm joking, I am.

Why should a module be callable? What's the advantage? Should we be able 
to add two modules together, yielding a module that contains all the 
code of both modules? What happens if I multiply a module by two - 
presumably the result should be the same as adding a module to itself? 
Perhaps we should be able to divide a module by a function?

The pursuit of orthogonality, while admirable, can lead to insanity if 
pushed too far.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From lycka at carmen.se  Fri Feb 24 11:17:59 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 24 Feb 2006 17:17:59 +0100
Subject: a little more help with python server-side scripting
In-Reply-To: <xNFLf.1672$No6.39067@news.tufts.edu>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<dSoLf.1663$No6.38996@news.tufts.edu> <dtmhot$4t4$1@wake.carmen.se>
	<nTELf.1667$No6.38886@news.tufts.edu>
	<43ff1d75$1_1@newspeer2.tds.net>
	<xNFLf.1672$No6.39067@news.tufts.edu>
Message-ID: <dtnbjp$va6$1@wake.carmen.se>

John Salerno wrote:
> But isn't this code:
> 
> Response.Write('Python Test<br>')
> Response.write('<h3>Smaller heading</hr>')
> 
> written using ASP instead of Python?

Listen John. This will be the last time I respond
to this thread, since you just ask more and more
instead of digesting all the information you are
given. Why should we spend time on answers if you
don't read them properly anyway.

I understand that you are confused, but you need to
analyze the material you have been provided. ASP is
not a programming language. The code above shows the
Python ASP API.

Most ASP developers use VBScript, and since ASP is one
of those technologies Microsoft tosses at clueless
people, I'm sure many people who use VBScript in ASP
don't understand the distinction, and those who hire
ASP developers or buy web site development often don't.
These guys will probably also think that Sun's language
Java and Netscape Corp's JavaScript are the same things
too. Clueless.

The example is a bit boring of course, since it doesn't
show anything except a few calls that probably look
almost the same in most languages that can be used in
ASP. If there had just been a loop or something...

Whatever web tool kit you use, there will be an API
that you must learn. An interface for communicating with
these mechanisms that provide the web server interface.

In the web context, there is some sort of request made
from a browser (or spider or whatever) and based on that,
the Python script (CGI, ASP, SkunkWeb PSP or whatever)
must handle the request (if there are parameters to care
about) and produce some kind of response.

In a CGI script, you work on a very low level, and need
to print content-type headers, error codes etc. In ASP,
your API takes care of the details, and you just print
the "meat". This abstraction is managed through the
Response object. I'm sure you can find plenty of help
on the web. Use google.


From tzot at sil-tec.gr  Fri Feb 10 04:08:33 2006
From: tzot at sil-tec.gr (Christos Georgiou)
Date: Fri, 10 Feb 2006 11:08:33 +0200
Subject: Using bytecode, not code objects
References: <d3d66b1c0601281655s4ba01fe1y@mail.gmail.com>
	<drhvmf$780$1@sea.gmane.org>
	<mailman.1206.1138575182.27775.python-list@python.org>
Message-ID: <otlou1l41p3neui5mduaejlq0h3bdb7vnh@4ax.com>

On Sun, 29 Jan 2006 14:51:18 -0800, rumours say that Michael Spencer
<mahs at telcopartners.com> might have written:

>>     http://www.effbot.org/librarybook/marshal.htm
 
>There's a typo in the text accompanying that example: img.get_magic() should be 
>imp.get_magic().

The error is easy to explain: he's on PIL(s) for years.
-- 
TZOTZIOY, I speak England very best.
"Dear Paul,
please stop spamming us."
The Corinthians


From adam.sven.johnson at gmail.com  Tue Feb  7 22:24:34 2006
From: adam.sven.johnson at gmail.com (adam johnson)
Date: Wed, 8 Feb 2006 16:24:34 +1300
Subject: module with __call__ defined is not callable?
In-Reply-To: <2773CAC687FD5F4689F526998C7E4E5F4DB920@au3010avexu1.global.avaya.com>
References: <2773CAC687FD5F4689F526998C7E4E5F4DB920@au3010avexu1.global.avaya.com>
Message-ID: <6ab99bf50602071924g10f44d2bk@mail.gmail.com>

Thanks for you answer.

I was under the impression that you could tack methods onto an object at any
time, your example almost works with old style classes and would with a
function instead of a method.

>>> class A:
...     def __init__(self):
...             self.__call__ = A.hello
...     def hello(self):
...             print "Hello, world!"
...
>>> a = A()
>>> a()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: unbound method hello() must be called with A instance as first
argument (got nothing instead)
>>> a(a)
Hello, world!
>>>

So now all I need to know is why now with new style classes the special
functions need to be defined on the class instead of attached to the
instance at any time.


On 08/02/06, Delaney, Timothy (Tim) <tdelaney at avaya.com> wrote:
>
> adam johnson wrote:
>
> > Hi All.
> > I was wondering why defining a __call__ attribute for a module
> > doesn't make it actually callable.
>
> For the same reason that the following doesn't work
>
>     class A (object):
>
>         def __init__(self):
>             self.__call__ = A.hello
>
>         def hello (self):
>             print 'Hello, world!'
>
>     a = A()
>     a()
>
>     Traceback (most recent call last):
>       File "D:\Python\modules\testclasscall.py", line 10, in ?
>         a()
>     TypeError: 'A' object is not callable
>
> The __call__ attribute must be defined on the class (or type) - not on
> the instance. A module is an instance of <type 'module'>.
>
> Tim Delaney
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From michele.petrazzo at TOGLIunipex.it  Thu Feb 23 04:12:24 2006
From: michele.petrazzo at TOGLIunipex.it (Michele Petrazzo)
Date: Thu, 23 Feb 2006 10:12:24 +0100
Subject: PyUNO with different Python
In-Reply-To: <mailman.2311.1140640788.27775.python-list@python.org>
References: <mailman.2306.1140622912.27775.python-list@python.org>	<43fcad29$0$29099$5fc30a8@news.tiscali.it>
	<mailman.2311.1140640788.27775.python-list@python.org>
Message-ID: <43fd7c87$0$29098$5fc30a8@news.tiscali.it>

Katja Suess wrote:
> Thanks. What I have in mind is to write a Python script to generate
> PDFs from a set of ODTs.

Pay attention that you have a OOo program running somewhere that accept
the connection from your zope server (I don't think that you have a X
server running on it.)

> This script has to run in Zope which brings its own Python. My
> problem is the setup of PyUNO with this Python which is not the OO
> included one.

Try with the little modify that I wrote and the other post and let us know.

> Hope to find a Mac user who made/solved similar experience... 
> Regards, Katja

Michele


From davidh at ilm.com  Thu Feb  2 20:10:24 2006
From: davidh at ilm.com (David Hirschfield)
Date: Thu, 02 Feb 2006 17:10:24 -0800
Subject: Best way to determine if a certain PID is still running
Message-ID: <43E2AD80.2000100@ilm.com>

I'm launching a process via an os.spawnvp(os.P_NOWAIT,...) call.
So now I have the pid of the process, and I want a way to see if that 
process is complete.

I don't want to block on os.waitpid(), I just want a quick way to see if 
the process I started is finished. I could popen("ps -p %d" % pid) and 
see whether it's there anymore...but since pids get reused, there's the 
chance (however remote) that I'd get a false positive, plus I don't 
really like the idea of calling something non-pure-python to find out.

So, should I run a monitor thread which just calls os.waitpid() and when 
the thread indicates via an event that the process completed, I'm golden?

All suggestions welcome, looking for simple and clean over wickedly-clever,
-David

-- 
Presenting:
mediocre nebula.



From daftspaniel at gmail.com  Thu Feb  9 07:06:07 2006
From: daftspaniel at gmail.com (daftspaniel at gmail.com)
Date: 9 Feb 2006 04:06:07 -0800
Subject: Inserting record with Microsoft Access
In-Reply-To: <mailman.1648.1139475091.27775.python-list@python.org>
References: <mailman.1648.1139475091.27775.python-list@python.org>
Message-ID: <1139486767.374162.9530@z14g2000cwz.googlegroups.com>

I can't remember the detail right now but look at SELECT @@IDENTITY.

Cheers,
Davy M



From http  Tue Feb 28 21:15:57 2006
From: http (Paul Rubin)
Date: 28 Feb 2006 18:15:57 -0800
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<1141019214.153904.115220@j33g2000cwa.googlegroups.com>
	<zIwMf.9924$PR2.201420@twister2.libero.it>
	<877j7gz53k.fsf@rose.polar.local>
	<7xd5h8jnk1.fsf@ruckus.brouhaha.com>
	<87hd6j3s51.fsf@rose.polar.local>
Message-ID: <7xhd6ilxk2.fsf@ruckus.brouhaha.com>

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:
> These don't seem simple or elegant. I don't see a particular benefit
> to doing it that way, rather than being explicit about manipulating
> the member list::
> 
>     pentium_instructions = enum('add', 'sub', 'mul')
>     athlon64_instructions = enum(
>         *[ str(i) for i in pentium_instructions] + ['add64', 'sub64'] )

I don't know about this.  It makes athlon64_instructions a completely
separate enum from pentium_instructions.  It could be that
athlon64_instructions.add should be the same as pentium_instructions.add .


From kmkz89 at gmail.com  Mon Feb 27 16:36:03 2006
From: kmkz89 at gmail.com (kmkz)
Date: 27 Feb 2006 13:36:03 -0800
Subject: Kill forked processes
In-Reply-To: <mailman.2465.1141020489.27775.python-list@python.org>
References: <1140990351.604347.29110@i39g2000cwa.googlegroups.com>
	<mailman.2456.1140992498.27775.python-list@python.org>
	<1141005265.153261.201230@e56g2000cwe.googlegroups.com>
	<mailman.2465.1141020489.27775.python-list@python.org>
Message-ID: <1141076163.509784.291270@v46g2000cwv.googlegroups.com>

I didn't mean that you'd have to write it for me, I meant that if what
you said works (atexit, signal) I will paypal you $10 for your generous
contribution to my project.



From claudio.grondi at freenet.de  Mon Feb 13 12:02:26 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Mon, 13 Feb 2006 18:02:26 +0100
Subject: Image to numeric array
In-Reply-To: <45bratF5up9fU1@uni-berlin.de>
References: <mailman.1831.1139841904.27775.python-list@python.org>
	<45bmv4F5rjf2U1@uni-berlin.de>
	<dsqb2i$19p$1@newsreader3.netcologne.de>
	<45bratF5up9fU1@uni-berlin.de>
Message-ID: <dsqe32$7m0$1@newsreader3.netcologne.de>

Diez B. Roggisch wrote:
>>Is there a difference between the 'Numeric' and 'numeric' module?
>>I have on my system only Numeric... And this has no function like
>>'from_image'.
> 
> 
> I actually didn't check that - I just wanted to point the OP to the
> numeric-module(s) available, as he suggested that 
> 
> 
>>The usual way of doing such things is to use PIL (Python Image Library) 
>>to load the image from file, then export it from PIL to a Python string 
>>in order to import from this string to an array of the targeted 
>>numerical module.
> 
> 
> I'd go for the getdata() method instead.
Yes, you are right.
Sorry, I should have checked it in source code before posting just from 
my memory. Usage of .tostring() was my first approach - I have replaced 
it later by .getdata() because of speed issues (we are speaking here 
about methods of the Image module available after installation of PIL).
As I have experience with numarray only, I can't help here directly with 
  a code example for Numeric.

Claudio
> 
> 
>>Really curious if there is a direct way in any of the numerical 
>>packages, as it would save the time and effort of unnecessary 
>>conversions from PIL, ImageMagick or from other image libraries.
> 
> 
> Whatever module is capable of converting needs to know how to read images -
> either by itself, or by means of another module. 
> 
> 
> I know for sure that pygame supports retrieving pixel-data as array.
> 
> Diez


From steve at holdenweb.com  Sat Feb 18 14:07:24 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 18 Feb 2006 14:07:24 -0500
Subject: Python 3000 deat !? Is true division ever coming ?
In-Reply-To: <1140213665.105188.103450@o13g2000cwo.googlegroups.com>
References: <1139810036.943598.229030@g47g2000cwa.googlegroups.com>	<dt4pj8$o21$1@wake.carmen.se>
	<1140213665.105188.103450@o13g2000cwo.googlegroups.com>
Message-ID: <dt7r96$4tm$1@sea.gmane.org>

seb.haase at gmail.com wrote:
> Thank you very much, Magnus !
> This is the answer I had been waiting for:
> 
>>A problem as I see it today, is that this behaviour is
>>not actively encouraged. The tutorial, which is maintained
>>and updated, still describes old style classes, and the
>>old division behaviour.
> 
> 
> My main point was/is:  why is there not more discussion about "true
> division" !!?

You are about three years too late for the discussion. It was debated to 
death when Guido proposed that Python should behave more like 
non-programmers expected it to. Despite some fierce opposition this view 
eventually held sway, and now long-time Pythonistas accept it as the way 
forward.

So basically most people saw your question and probably thought "enough, 
already!".

> Just like the second answer to my posting clearly showed:
> PEOPLE THINK TRUE DIVISION IS "ONLY IN MATLAB"  !!
> 
> As you pointed out: the "true division" part of "Python3000" might be
> one of the "scariest" and should therefore be pointed out already in
> the tutorial !!  (It would look quite ugly to newcomers, though)
> 
> Having said that:  I would vote against EVER introducing true division
> as default - because it will just PISS too many (long time python)
> people OFF. ;-)
> 
I think you underestimate the power of the Python community to adapt to 
change when it's necessary for the long-term benefit of the language.

> Thanks,
> Sebastian Haase
> 
[...]

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From andreas at openrts.org  Wed Feb  1 05:02:38 2006
From: andreas at openrts.org (Andreas R.)
Date: Wed, 01 Feb 2006 11:02:38 +0100
Subject: OpenRTS - new OSS Python game
Message-ID: <drq0vt$62f$1@orkan.itea.ntnu.no>

OpenRTS is a new open source project, with the aim of creating a 
realtime strategy game. The game is developed in Python with Pygame. See 
http://www.openrts.org for more info about the game if you are interested.


From onurb at xiludom.gro  Wed Feb  8 04:40:31 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Wed, 08 Feb 2006 10:40:31 +0100
Subject: Python Class use
In-Reply-To: <1139344110.219073.244830@f14g2000cwb.googlegroups.com>
References: <1139344110.219073.244830@f14g2000cwb.googlegroups.com>
Message-ID: <43e9bca8$0$313$626a14ce@news.free.fr>

S Borg wrote:
>  Hello,
> 
>  I am running Python on Mac OS X. The interpreter has been great for
> learning the basics, but I would now like to be able to reuse code.
> How do I write reusable code? I have done it "The Java way": write
> the class, and save it to my home directory, then call it from the
> interpreter, here is an example.
> 
> ########my saved file######
> class MyClass:
>   def f(self):
>       return 'calling f from MyClass'
> 
> #######interpreter#########
> 
>>>>x = MyClass()
>>>>(unhelpful error mesages)

This message - that is called a 'traceback' - may seem unhelpful to you,
but as a general rule, please post it : it may be *very* helpful to
those trying to help you (well, in this case the problem is pretty
obvious, but most of the time it is not...)

NB: see other answers in this thread about your actual problem - and
please take time to read the Fine Manual, specially:
http://docs.python.org/tut/node8.html


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From gslindstrom at gmail.com  Mon Feb 20 14:14:08 2006
From: gslindstrom at gmail.com (Greg Lindstrom)
Date: Mon, 20 Feb 2006 13:14:08 -0600
Subject: PyDev/Eclipse Help
Message-ID: <57aa55060602201114p4e59e402x4d7ca58bab68797@mail.gmail.com>

I am running Python 2.4 on Windows XP "Professional" and Eclipse 3.1.  I
would like to take a look at PyDev on Eclipse and downloaded the PyDev (
1.0.2?) via the Help->SotwareUpdates->FindAndInstall wizard.  Then then go
to create a Python Project with File->New->Project and then select
Pydev->Pydev Project and get an Error Dialog stating: "The selected wizard
could not be started.  Reason: Plug-in org.python.pydev was unable to load
class org.python.pydev.ui.wazards.project.PythonProjectWizard."  Can any of
you wizards tell me what this means (well, OK, I *know* it means I can't
load PythonProjectWizard, but you get my drift, right?).

Thanks for your help...see yo in Dallas!
--greg
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From xah at xahlee.org  Tue Feb 28 03:33:11 2006
From: xah at xahlee.org (Xah Lee)
Date: 28 Feb 2006 00:33:11 -0800
Subject: HTML/DOM parser
Message-ID: <1141115591.120432.221900@t39g2000cwt.googlegroups.com>

is there a module that lets me parse validated html files and store it
as a tree?

for example, i want to be able to easily, say, replace the following

<hr><p>References</p>
<pre>
? <a href=a>a...</a>
...
</pre>

to

<hr><p>References</p>
<ul>
<li><a href=a>a...</a></li>
...
</ul>

Thanks.

   Xah
   xah at xahlee.org
 ? http://xahlee.org/



From case.nelson at gmail.com  Thu Feb 16 16:52:28 2006
From: case.nelson at gmail.com (snoe)
Date: 16 Feb 2006 13:52:28 -0800
Subject: Evil, evil wxPython (and a glimmer of hope)
In-Reply-To: <1140116551.116322.12680@g43g2000cwa.googlegroups.com>
References: <1140116551.116322.12680@g43g2000cwa.googlegroups.com>
Message-ID: <1140126748.067985.39760@g14g2000cwa.googlegroups.com>


vivainio at gmail.com wrote:
> I rarely do GUIs, and reminded myself today why that is the case
> (simply, it's not fun).
>
> I implemented a simple TreeCtrl, and had to implement my own 'children'
> method, of all things!
>
> Here it is:
>
>     def children(self,node):
>         c = []
>         nc,cookie = self.GetFirstChild(node)
>         while 1:
>             info = self.GetItemText(nc)
>             c.append((info,nc))
>
>             nc, cookie= self.GetNextChild(node,cookie)
>             if not nc.IsOk():
>                 break
>
>         return c
>
>
> And it even fails with zero children. This is as unpythonic as it gets.
>
> However, it should be pretty easy to write small wrapper over the
> wxPython api. I'm thinking of wrapping or injecting additional methods
> to TreeCtrl that start with lowercase letters and return something
> sensible, with reasonable methods. Something like:
>
> root = self.AddRoot("root dir") # root is normal wx TreeCtrl root
> tree = EasyWx(root)   # now tree is our wrapped, more "fun" root
> for c in tree.children():
>   print c.name
>
> # etc. etc.
>
> This is a bit like Brian Orendorff's "path" module that turns something
> low level to something you can use easily, without throwing you into a
> world of "frameworks", toolkits and whatnot. I can see there are things
> like Wax or PythonCard, but they are still too "frameworky", and you
> don't use them to extend wxPython, you use *them* and they use
> wxPython. I'd basically like to rely on something that is there for the
> long haul (plain wxPython API) but only use convenience wrappers *on my
> own initiative*, as it seems convenient. Just like I'd use the "path"
> module.
>
> wxPython is great as it is (a simple wrapper for a C++ toolkit) and the
> basic design is ok & proven, I'm just too lazy to use it in its current
> form.

Take a look at dabo, II think they're doing exactly what you're
describing.
http://blog.dabodev.com/



From bonono at gmail.com  Sun Feb 12 20:22:01 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 12 Feb 2006 17:22:01 -0800
Subject: Is python very slow compared to C
In-Reply-To: <pan.2006.02.12.17.18.50.356928@REMOVETHIScyber.com.au>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
	<1139754010.067582.214830@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>
	<mailman.1785.1139762698.27775.python-list@python.org>
	<pan.2006.02.12.17.18.50.356928@REMOVETHIScyber.com.au>
Message-ID: <1139793721.739325.235780@z14g2000cwz.googlegroups.com>


Steven D'Aprano wrote:
> > Programming in Lua
> > Object-Oriented Programming
> > http://www.lua.org/pil/16.html
>
> Did you actually bother to read the page you linked to? It describes how
> you can emulate object-like behaviour for Lua tables. The following page
> is even more explicit: "Lua does not have the concept of class".
>
> That means that the object-oriented framework, which you get for free in
> Python, has to be at least partially handled by the programmer in Lua.
> Perhaps Lua makes it easy to do, but it is still something that doesn't
> need to be done in Python because it is already there.

Lua does not have a concept of class doesn't mean it doesn't have the
concept/framework of OO. It seems to be using a prototype based OO
framework similar to javascript. So one can have features like
inheritance without "class".

I can speak the same about Python if I view it from a prototype based
perspective, where one get them for free in Lua but need to implement
them in Python.



From gh at ghaering.de  Tue Feb 21 05:13:09 2006
From: gh at ghaering.de (=?ISO-8859-1?Q?Gerhard_H=E4ring?=)
Date: Tue, 21 Feb 2006 11:13:09 +0100
Subject: Little tool - but very big size... :-(
In-Reply-To: <43FAD9E3.5010004@gmail.com>
References: <43FAD9E3.5010004@gmail.com>
Message-ID: <43FAE7B5.5050903@ghaering.de>

Durumdara wrote:
> Hi !
> 
> I have a problem.
> I have a little tool that can get data about filesystems and wrote it in
> python.
> 
> The main user asked me a GUI for this software.
> 
> This user is needed a portable program, so I create this kind of the
> software with Py2Exe.
> 
> But it have very big size: 11 MB... :-( [...]

You can create an installer using NSIS and choose LZMA compression. 
That's the slickest way I know to distribute your application.

If that's too much trouble, you can also distribute your application as 
a self-extracting 7ZIP-Archive using LZMA compression 
(http://www.7-zip.org/).

Quick size test here with a small wxPython helper app of mine:

py2exe dist directory size: 12.469.572 Bytes

7ZIP self-extracting archive (LZMA, default settings): 2,80 MB 
(2.942.543 Bytes)

A NSIS installer will not add much overhead (a few hundred KB).

HTH,

-- Gerhard


From max at alcyone.com  Wed Feb  1 21:31:34 2006
From: max at alcyone.com (Erik Max Francis)
Date: Wed, 01 Feb 2006 18:31:34 -0800
Subject: Why checksum? [was Re: Fuzzy Lookups]
In-Reply-To: <pan.2006.01.31.21.28.14.333129@REMOVETHIScyber.com.au>
References: <1138635665.956131.130630@f14g2000cwb.googlegroups.com>
	<1138670927.377396.78090@g44g2000cwa.googlegroups.com>
	<mailman.1266.1138680617.27775.python-list@python.org>
	<1138721690.283464.71570@g14g2000cwa.googlegroups.com>
	<mailman.1289.1138722708.27775.python-list@python.org>
	<pan.2006.01.31.21.28.14.333129@REMOVETHIScyber.com.au>
Message-ID: <6MadnfUECYqb8nzeRVn-jw@speakeasy.net>

Steven D'Aprano wrote:

> This isn't a criticism, it is a genuine question. Why do people compare
> local files with MD5 instead of doing a byte-to-byte compare? Is it purely
> a caching thing (once you have the checksum, you don't need to read the
> file again)? Are there any other reasons?

Because if you store a hash, then you can keep that around even when the 
original file is archived, moved elsewhere, or deleted.  It's awfully 
helpful for building databases of files you've seen before.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   Everyone wants to look good at his own funeral.
   -- Louis Wu


From altis at semi-retired.com  Mon Feb 13 03:49:57 2006
From: altis at semi-retired.com (Kevin Altis)
Date: Mon, 13 Feb 2006 00:49:57 -0800
Subject: ANNOUNCE: Proposals due today, Feb. 13th, for OSCON 2006 (Python 14)
Message-ID: <ECXHf.100$wk2.34190@news.uswest.net>

Save the date for the 8th annual O'Reilly Open Source Convention, happening
July 24-28, 2006 at the Oregon Convention Center in beautiful Portland,
Oregon.



Call For Participation
----------------------

Submit a proposal-fill out the form at:

http://conferences.oreillynet.com/cs/os2006/create/e_sess/

Important Dates:

* Proposals Due: Midnight (PST) February 13, 2006
* Speaker Notification: March 27, 2006
* Tutorial Presentation Files Due: June 12, 2006
* Session Presentation Files Due: June 26, 2006
* Conference: July 24-28, 2006

Proposals
---------

We are considering proposals for 45 minute sessions and 3 hour tutorials.
We rarely accept 90 minute proposals, as most general sessions are 45
minutes in length.  Your proposals are examined by a committee which draws
from them and which also solicits proposals to build the program.  Proposals
are due by midnight (PST), Feb. 13, 2006.  The OSCON Speaker Manager, Vee
McMillen, emails notification of the status of your talk (accepted or
otherwise) by March 27, 2006.  Unless the content of your talk is
particularly timely (e.g., features of a product that will be launched at
OSCON), you are required to send us your slides several weeks before the
conference begins. Submit proposals via the form below.

Some tips for writing a good proposal for a good talk:

* Keep it free of marketing: talk about open source software, but not about
a commercial product--the audience should be able to use and improve the
things you talk about without paying money
* Keep the audience in mind: they're technical, professional, and already
pretty smart.
* Clearly identify the level of the talk: is it for beginners to the topic,
or for gurus?  What knowledge should people have when they come to the talk?
* Give it a simple and straightforward title: fancy and clever titles make
it harder for people (committee and attendees) to figure out what you're
really talking about
* Limit the scope of the talk: in 45 minutes, you won't be able to cover
Everything about Widget Framework X.  Instead, pick a useful aspect, or a
particular technique, or walk through a simple program.
* Pages of code are unreadable: mere mortals can deal with code a line at a
time.  Sometimes three lines at a time.  A page of code can't be read when
it's projected, and can't be comprehended by the audience.
* Explain why people will want to attend: is the framework gaining traction?
Is the app critical to modern systems?  Will they learn how to deploy it,
program it, or just what it is?
* Let us know in your proposal notes whether you can give all the talks you
submitted proposals for
* Explain what you will cover in the talk

NOTE: All presenters whose talks are accepted (excluding Lightning Talks)
will receive free registration at the conference. For each half-day
tutorial, the presenter receives one night's accommodation, a limited travel
allowance, and an honorarium. We give tutors and speakers registration to
the convention (including tutorials), and tutors are eligible for a travel
allowance: up to US$300 from the west coast of the USA, up to US$500 from
the east coast of the USA, up to US$800 from outside the USA.

Registration opens April, 2006. If you would like to be notified by email
when registration opens, please use the form on our main page.



CONFERENCE INFO
===============

The O'Reilly Open Source Convention is where coders, sysadmins,
entrepreneurs, and business people working in free and open source software
gather to share ideas, discover code, and find solutions. At OSCON 2005,
more than 2,400 attendees took part in 241 sessions and tutorials across
eleven technology tracks, learning about the newest features and versions
from creators and experts. A record number of products launches and
announcements were made, and sponsors and exhibitors from a wide range of
companies filled the largest exhibit hall in OSCON's history. We anticipate
that OSCON 2006 will be even more successful, and continue to be the place
for the open source community to meet up, debate, make deals, and connect
face to face. OSCON 2006 will take place at the Oregon Convention Center in
Portland, Oregon July 24-28, 2006.

OSCON 2006 will feature the projects, technologies, and skills that you need
to write and deploy killer modern apps.  We're looking for proposals on
platforms and applications around:

* Multimedia including voice (VoIP) and video
* AI including spam-busting, classification, clustering, and data mining
* Collaboration including email, calendars, RSS, OPML, mashups, IM,
presence, and session initialization
* Project best practices including governance, starting a project, and
managing communities
* Microsoft Windows-based open source projects including .NET, Mono, and
regular C/C++/Visual Basic Windows apps
* Enterprise Java techniques including integration, testing, and scalable
deployment solutions
* Linux kernel skills for sysadmins including virtualization, tuning, and
device drivers
* Device hacking including iPods, Nintendo, PSP, XBox 360, and beyond
* Design including CSS, GUI, and user experience (XP)
* Entrepreneurial topics including management for techies, how to go into
business for yourself, and business models that work
* Security including hardening, hacking, root kits (Sony and otherwise), and
intrusion detection/cleanup
* Fun subjects with no immediate commercial application including retro
computing, games, and BitTorrent

Tracks at OSCON will include:

* Desktop Apps
* Databases, including MySQL, PostgreSQL, Ingres, and others
* Emerging Topics
* Java
* Linux Kernel for SysAdmins
* Linux for Programmers
* Perl, celebrating the 10th year of The Perl Conference!
* PHP
* Programming, including everything that's not specific to a particular
language
* Python
* Security
* Ruby, including Ruby on Rails
* Web Apps, including Apache
* Windows





From andre.roberge at gmail.com  Mon Feb 13 08:16:52 2006
From: andre.roberge at gmail.com (Andre Roberge)
Date: Mon, 13 Feb 2006 09:16:52 -0400
Subject: Python equivilant to msgbox()
In-Reply-To: <ca55a9900602130502p17c6d20blbe0d7652393defcd@mail.gmail.com>
References: <7CQHf.2690$7C3.1780@trnddc08> <43efd40a$1_2@newspeer2.tds.net>
	<1139794076.321041.320480@g43g2000cwa.googlegroups.com>
	<ca55a9900602130502p17c6d20blbe0d7652393defcd@mail.gmail.com>
Message-ID: <7528bcdd0602130516p76caa58dtc213300a1e0a14d8@mail.gmail.com>

On 2/13/06, Peter Decker <pydecker at gmail.com> wrote:
> On 12 Feb 2006 17:27:56 -0800, Andr? <andre.roberge at gmail.com> wrote:
>
> > It's also possible to something like that with wxPython.  Try:
> > import wx
> > app = wx.PySimpleApp()
> > dlg = wx.TextEntryDialog(None, 'Enter value', 'Title', '')
> > if dlg.ShowModal() == wx.ID_OK:
> >     val = dlg.GetValue()  # this line should be indented
> > dlg.Destroy()
> > print "you have entered %s" % val
>
> That's the sort of butt-ugly code that got me convinced that Dabo is
> the way to go. To get a simple message box, you have to create it,
> show it, check a return value against an ugly constant (make sure you
> don't forget an use wx.OK instead!), and then remember to destroy it
> or your app will hang.
>
> The same code in Dabo is:
>
> val = dabo.ui.getString("Enter value", "Some Title")
> if val in None:
>    print "You canceled"
> else:
>    print "You entered %s" % val
>
> Look at both examples, and tell me which looks more Pythonic to you.

While I agree that dabo's version is more Pythonic than wxPython, my
understanding is that dabo is built on top of wxPython.  There are
other framework (wax, anygui) that also aim to make the coding "more
pythonic", hiding "ugly" wxPython details.  Personnally, I am hesitant
to start using an extra layer on top of wxPython, with no guarantee
that it will be always updated.  Ideally, something like dabo+wxPython
would become part of the standard Python distribution.

The original post was asking if it was possible to have such message
dialogs using Python, without having a full gui app.  I'd say that the
answer is yes... and that one has a lot of options, depending on how
many packages one is ready to download.

Andr?


From duncanm255 at hotmail.com  Tue Feb 21 07:07:48 2006
From: duncanm255 at hotmail.com (D)
Date: 21 Feb 2006 04:07:48 -0800
Subject: Tkinter Checkboxes
In-Reply-To: <dteg9l$m9$1@news.lysator.liu.se>
References: <1140477331.298891.153330@g14g2000cwa.googlegroups.com>
	<dteg9l$m9$1@news.lysator.liu.se>
Message-ID: <1140523667.983265.312750@g44g2000cwa.googlegroups.com>

Thank, Mikael..after messing with it for quite awhile, I finally found
out I need the .get()!  Appreciate the help..

Doug



From ivoras at fer.hr  Fri Feb  3 14:03:01 2006
From: ivoras at fer.hr (Ivan Voras)
Date: Fri, 03 Feb 2006 20:03:01 +0100
Subject: would it be feasable to write python DJing software
In-Reply-To: <11u6t3qc13jplad@corp.supernews.com>
References: <1138925819.465108.181760@o13g2000cwo.googlegroups.com>
	<druc1r$cre$1@bagan.srce.hr>
	<1138962918.427815.70300@g14g2000cwa.googlegroups.com>
	<drvdq6$gjq$1@bagan.srce.hr> <11u6t3qc13jplad@corp.supernews.com>
Message-ID: <ds09ej$qbq$1@bagan.srce.hr>

Grant Edwards wrote:
> On 2006-02-03, Ivan Voras <ivoras at __yahoo__.com_> wrote:
> 
>>simonwittber at gmail.com wrote:
>>
>>>Actually, manipulating and mixing audio samples can be both fast and
>>>elegant, in Python, if you use Numeric or a similar library.
>>
>>... at which point you're actually doing it in C, not pure python... :)
> 
> If that's the way you want to look at it, there is nothing that
> can be done in pure python.  

I think people who say that deliberately misunderstand the point. Python 
is suitable for some things, not for others. So is C.


From pydecker at gmail.com  Sat Feb 11 13:06:39 2006
From: pydecker at gmail.com (Peter Decker)
Date: Sat, 11 Feb 2006 13:06:39 -0500
Subject: Yet another GUI toolkit question...
In-Reply-To: <43EE1DD2.7040009@wordtech-software.com>
References: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
	<mailman.1747.1139671043.27775.python-list@python.org>
	<43EE1DD2.7040009@wordtech-software.com>
Message-ID: <ca55a9900602111006jc5ab55fu44e30dc2dff3c3ba@mail.gmail.com>

On 2/11/06, Kevin Walzer <sw at wordtech-software.com> wrote:

> Dabo looks interesting, but isn't it mainly for database applications?
> Has any other kind of application been developed with it? Also, it seems
> very Windows/Linux-centric. Is anyone using it on OS X?

The Dabo demo comes with several games written that have no database
stuff at all. According to the developers (one of whom develops on OS
X, to answer your other question), they started out creating a tool
for database apps, but the response has been so strong on the UI side
that they've spent most of their time making the dabo.ui module able
to be used by iteself.

I don't do any development work with databases, and I've used Dabo for
several internal apps. The stuff I used to write in wxPython I now
write in Dabo.

--

# p.d.


From jasondrew72 at gmail.com  Fri Feb 24 19:02:13 2006
From: jasondrew72 at gmail.com (Jason Drew)
Date: 24 Feb 2006 16:02:13 -0800
Subject: How to move optparse from main to function?
In-Reply-To: <1140726605.085893.256240@z34g2000cwc.googlegroups.com>
References: <1140721179.096585.202560@g14g2000cwa.googlegroups.com>
	<1140724501.360284.227790@i39g2000cwa.googlegroups.com>
	<1140726605.085893.256240@z34g2000cwc.googlegroups.com>
Message-ID: <1140825733.526134.56920@i40g2000cwc.googlegroups.com>

You're welcome!

As usual, each of us is free to write the code whichever way works best
for the particular problem at hand. That's why the module documentation
often avoids advocating here-is-the-one-best-way-to-do-it.  I just like
sticking all the option setup stuff in a single function because it's
conceptually all the same and it makes the main() function or whatever
read shorter. It's partly down to experience, what little of it I can
claim.

Good luck!



From crutcher at gmail.com  Mon Feb 27 19:08:45 2006
From: crutcher at gmail.com (Crutcher)
Date: 27 Feb 2006 16:08:45 -0800
Subject: Catch exceptions
In-Reply-To: <1141083485.798371.188440@u72g2000cwu.googlegroups.com>
References: <1141083485.798371.188440@u72g2000cwu.googlegroups.com>
Message-ID: <1141085325.698323.297100@v46g2000cwv.googlegroups.com>

Without seeing more of your code, I'm not sure what you are doing
wrong. This works:
vvvvvvvv ex.py vvvvvvvvvvvvvv
def xopen(path):
  try:
    return open(path)
  except IOError, e:
    print 'Error:', e.args[1]

xopen('xyzzy')
^^^^^^^^^^^^^^^^^^^^^^^^^^
$ python ex.py
Error: No such file or directory

Could you give us the traceback?



From joel.hedlund at gmail.com  Tue Feb  7 04:17:17 2006
From: joel.hedlund at gmail.com (Joel Hedlund)
Date: Tue, 07 Feb 2006 10:17:17 +0100
Subject: Best way of finding terminal width/height?
In-Reply-To: <11ueq4nhn91qm91@corp.supernews.com>
References: <96nFf.43896$d5.199922@newsb.telia.net>
	<11uc3dohfitotc5@corp.supernews.com>
	<jysFf.155352$dP1.513537@newsc.telia.net>
	<11udc0r2bq11042@corp.supernews.com> <43E719EE.3040401@gmail.com>
	<11ueq4nhn91qm91@corp.supernews.com>
Message-ID: <43E8659D.6010101@gmail.com>

> You might want to try just setting a flag in the signal handler
> to see if that prevents the I/O operations on stdin/stdout from
> being interrupted.

Tried this:

<source>

import signal, os, sys
from terminal_info import get_terminal_size

terminal_size = get_terminal_size()

_bTerminalSizeChanged = False

def report_terminal_size_change(signum, frame):
    global _bTerminalSizeChanged
    _bTerminalSizeChanged = True

def update_terminal_size():
    global _bTerminalSizeChanged, terminal_size
    terminal_size = get_terminal_size()
    _bTerminalSizeChanged = False
    
signal.signal(signal.SIGWINCH, report_terminal_size_change)

while True:
    # Do lots of IO (I'm trying to provoke exceptions with signal)
    open('/a/large/file').read()
    #raw_input()
    #sys.stdin.read()
    #print open('/a/large/file').read()
    
    if _bTerminalSizeChanged:
        update_terminal_size()
        print terminal_size

</source>

As before, the only IO case above that doesn't throw exceptions is the uncommented one. 

> Yup, that's the exception.  Standard practice is to catch it and
> retry the I/O operation.

Hmm... I guess it's not that easy to "retry" IO operations on pipes and streams (stdin/stdout in this case)... And I tend to lean pretty heavily on those since I usually write UNIX style text "filters".

So in case I haven't missed something fundamental I guess my best option is to accept defeat (of sorts :-) and be happy with picking a terminal width at program startup.

But anyway, it's been really interesting trying this out. 

Thank you Grant (och Jorgen) for all help and tips!
/Joel


From lycka at carmen.se  Wed Feb  1 08:25:24 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 01 Feb 2006 14:25:24 +0100
Subject: Python vs C for a mail server
In-Reply-To: <9mtNI+TVciB@jens-theisen.de>
References: <mailman.3994.1138546139.27774.python-list@python.org>	<mailman.1197.1138549204.27775.python-list@python.org>
	<9mtNI+TVciB@jens-theisen.de>
Message-ID: <drqcs5$ert$1@wake.carmen.se>

Jens Theisen wrote:
> Jay wrote:
>> How much time in your C/C++ code is spent casting and trying to
>>trick the compiler into doing something that it thinks you shouldn't be
>>doing?
> 
> Not much frankly. Though I have no doubt that there is a lot of code that  
> does, but more so in older C++ code.

I think the real difference between Python and C++ code in this
respect is rather how easy it is to adapt the code to a change in
requirements. How many lines of code of C++ or Python needs to be
changed when you get a particular change request. There are some
cases where the Python programmer will simply smile and say, "that
already works" (well, he should probably write a test case and run
that first), where the C++ programmer gets to do a lot of changes
to his code. Usually, the difference is probably smaller than that,
but the Python coder is probably less nervous about change requests
(provided that he has proper automated tests)...

There is probably more logical duplication in the C++ code, with
different code snippets handling different cases where one set of
Python code works with several differnt types. Changes in the
semantics of these functions lead to changes in one place for the
Python coder, and several changes for the C++ coder, which means
a risk that a fix is partially implemented, and works in some cases
but fails in others.

>>Because in all of my own industry experience, it's been MUCH easier to
>>jump into someone else's Python code than someone else's C++ code (and
>>at my last job, I had to do a lot of both). I find Python to be much
>>more self-documenting, because there's not so much scaffolding all over
>>the place obfuscating the true intention of the code.

I'm sure this depends a lot on what people are used to.
I had to provide source code for inspection for a job
interview, and the reviewers (who write both C++ and
Python) said that they felt that my code was more difficult
to understand than the other code samples (which were in
C++ or Java). (I still got a job though.)

This might be because I'm a crappy programmer, or because
the other people typically handed in some university project
they had been fully in charge of and written for the purpose
of examination, while my code had been changed over a few
years based on the whim of a fairly non-technical customer,
and only ever read by me. It might be because my code dealt
with a more complex problem, or at least something that was
difficult for the reviewers to grasp. It could also be because
the reviewers were more used to C++. They said that they felt
that the lack of .h-files made it difficult for them to get
an overview of the code, but it didn't seem that they used
anything like pydoc to get a picture of the API. In other
words, your milage might vary, and the choice of programming
language is just one among many factors that influence how
easy it is to read code.

Having said that, I agree: It's typically easier to get into
someone else's Python code. Particularly when so-called C++
code is really C with lots of globals, no classes and 63
pages of functions (many of which are several pages long,
the longest being 13 pages) which often modify the global
variables. (Yes, I have such a nice thing on my table now.
Happily, I don't have to maintain it. I'm writing a Python
program that partially does the same thing, but I doubt this
program will help me understand the problems involved, or
help me find optimal solutions...)


From aleaxit at yahoo.com  Sat Feb 11 00:32:02 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Fri, 10 Feb 2006 21:32:02 -0800
Subject: Scientific Computing with NumPy
References: <ds7bvh$ab1$2@gemini.csx.cam.ac.uk>
	<mailman.1482.1139225595.27775.python-list@python.org>
	<ds7ch4$bj7$1@gemini.csx.cam.ac.uk>
	<mailman.1704.1139573734.27775.python-list@python.org>
	<qnkslqq8ztf.fsf@arbutus.physics.mcmaster.ca>
Message-ID: <1hakbrt.147zsor1kgwh3rN%aleaxit@yahoo.com>

David M. Cooke <cookedm+news at physics.mcmaster.ca> wrote:

> "linda.s" <samrobertsmith at gmail.com> writes:
> 
> > where to download numpy for Python 2.3 in Mac?
> > Thanks!
> > Linda
> 
> I don't know if anybody's specifically compiled for 2.3; I think most
> of the developers on mac are using 2.4 :-)

However, what comes with MacOSX is STILL 2.3 (specifically 2.3.5 with
Tiger).


Alex


From uval at rz.uni-karlsruhe.de  Sun Feb  5 21:40:55 2006
From: uval at rz.uni-karlsruhe.de (=?ISO-8859-1?Q?Sch=FCle_Daniel?=)
Date: Mon, 06 Feb 2006 03:40:55 +0100
Subject: Numeric and matlab
In-Reply-To: <mailman.1452.1139174878.27775.python-list@python.org>
References: <mailman.1452.1139174878.27775.python-list@python.org>
Message-ID: <ds66c1$4qq$1@news2.rz.uni-karlsruhe.de>

Hello,

[...]
> 
> I'm sure there are more, but these jump out at me as I'm going.  It 
> seems as if the idx=find() stuff can be done with Numeric.nonzeros(), 
> but you can't index with that, like
> 
> a=Numeric.arange(1,11,1)
> idx=Numeric.nonzeros(a)

import Numeric as N
N.nonzero

without s :)

> a=a[idx]   % doesn't work

i don't know whether arange object overloads __getitem__
like

 >>> class X(object):
...     def __getitem__(self,i):
...             return self.lst[i]
...     def __init__(self):
...             self.lst = [7,5,3,1]
...
 >>> x=X()
 >>> x[0]
7
 >>> x[1]
5
 >>>

or consider

 >>> class List(list):
...     def __getitem__(self,idx):
...             if type(idx) is list:
...                     ret = []
...                     lst = list(self)
...                     return [lst[i] for i in range(len(lst)) if i in idx]
...
 >>> lst=List([1,2,3,4,5])
 >>> lst
[1, 2, 3, 4, 5]
 >>> lst[[0,2]]
[1, 3]
 >>>

if it would overload this would be possible, the normal
python list takes slices

range(0,100)[1:10:2]
s = slice(1,10,2)
range(0,100)[s]

here some ideas for what you tring to do

 >>> nums	# normal python list
[0, 1, 2, 1, 0, 0, 0, 3, 4, 0]
 >>> filter(lambda x: x!=0, nums)
[1, 2, 1, 3, 4]

 >>> [item for item in nums if item !=0 ]
[1, 2, 1, 3, 4]
 >>>

 >>> a=N.arange(0,11,.5)
 >>> filter(lambda x: x!=0, a)
[0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 
7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5]

 >>> [item for item in a if item !=0 ]
[0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 
7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5]

Regards, Daniel



From danb_83 at yahoo.com  Sat Feb 11 17:21:24 2006
From: danb_83 at yahoo.com (Dan Bishop)
Date: 11 Feb 2006 14:21:24 -0800
Subject: simple math question
References: <RuWdnVmaD4Q23XPeRVn-tw@rcn.net>
	<7x4q354one.fsf@ruckus.brouhaha.com>
Message-ID: <1139696484.814595.173040@g44g2000cwa.googlegroups.com>

Paul Rubin wrote:
> John Salerno <johnjsal at NOSPAMgmail.com> writes:
> > Can someone explain to me why the expression 5 / -2 evaluates to -3,
> > especially considering that -2 * -3 evaluates to 6?
> >
> > I'm sure it has something to do with the negative number and the
> > current way that the / operator is implemented, but why doesn't it
> > evaluate to -2 instead?
>
> Well, -2 * -2 is 4, which is not especially better than 6.  The
> reason for choosing -3 instead of -2 is so that if b is positive,
> then a%b is non-negative even if a is negative.  That is, the
> motivating case is (-5 % 2) which is done the same way as (5 % -2).

As a more concrete example, consider the case of a Date class that
stores dates as the number of days since an epoch, which happens to be
a Sunday.  To compute the day of the week a date falls on, you could
use:

SUNDAY, MONDAY, ..., SATURDAY = xrange(7)

class Date:
   ...
   def weekday(self):
      return self.daycount % 7


But what about the day BEFORE the epoch, represented by -1?

Case 1: Suppose that -1 // 7 == 0, as it is in C.  In order to preserve
that

> You want (b*(a/b) + a%b)==a at all times.

With a=-1, b=7, and a//b=0, this means (7*0 + a%b)==-1, which requires
that -1 % 7 == -1.  This doesn't correspond to any of the weekday
constants, which means you'd have to rewrite your weekday() method if
you wanted to handle negative dates.

Case 2: Suppose that -1 // 7 = -1.

Then (7*(-1) + -1%7)==-1, which means -1%7 happens to be 6.  This says
that the day before the epoch is a Saturday, which is exactly what you
want.

> Since a%b is positive, you can use it as a list index, etc.

This isn't the best explanation, because negative list indices *are*
allowed.



From fredrik at pythonware.com  Mon Feb 13 14:00:32 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Feb 2006 20:00:32 +0100
Subject: Location of Python modules
References: <1139854184.504114.46690@z14g2000cwz.googlegroups.com><1139854642.175799.165950@g43g2000cwa.googlegroups.com><1139854910.669876.84730@o13g2000cwo.googlegroups.com><43F0D1A7.8000501@v.loewis.de>
	<1139856376.208422.182090@f14g2000cwb.googlegroups.com>
Message-ID: <dsql0j$3sf$1@sea.gmane.org>

"Byte" <eoinrogers at gmail.com> wrote:

> Found it in /usr/local/lib/python2.4/site-packages, thanks. Now, how do
> i convert a .py program into a module?

a .py program is a module (the module's content is what's left when the
program is finished).

to make a useful module, just make sure that it defines all the stuff you
want to make available (functions, classes, constants, etc), and that it
doesn't have any unexpected side-effects.

to create a script that can be used both as a script and as a module, you
can check the __name__ variable.  see:

    http://diveintopython.org/getting_to_know_python/testing_modules.html

for more on this.

</F>





From david.murmann at rwth-aachen.de  Fri Feb  3 22:57:28 2006
From: david.murmann at rwth-aachen.de (David Murmann)
Date: Sat, 04 Feb 2006 04:57:28 +0100
Subject: IPy module
In-Reply-To: <mailman.1306.1138765872.27775.python-list@python.org>
References: <mailman.1306.1138765872.27775.python-list@python.org>
Message-ID: <44in0lF2cs4kU1@news.dfncis.de>

yawgmoth7 schrieb:
> I was discussing this in another email, sadly I have misplaced the
> email. I got the module IPy, and I am taking a variable from the
> user(An IP) and doing something like this:
> 
> startip = raw_input("Enter start IP: ")
> ip = IPy.IP(startip\255)
> for x in ip():
>    <Do neat stuff>
> 
> Well, this doesn't work(I knew it wouldn't but i had to give it a try.
> Since, this has to be a value from the user, and It has to have a
> range(Hence the \255 part). How could I do this using IPy? Thank you
> for your time.

it is absolutely not clear what you want. what should \255 do? replace
the last part of the ip with 255? if so, why do you want to do that?
what do you expect the user to input? if he enters, for example,
192.168.1.2, which ip-addresses do you expect to get in the loop?

i have no clue what you want to do, sorry.

--
David.


From aleaxit at yahoo.com  Sun Feb 19 02:30:54 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sat, 18 Feb 2006 23:30:54 -0800
Subject: - Copy dictionary entries to attributes
References: <dt7kv6$dcn$1@usenet.otenet.gr>
	<1140319945.169944.31940@g14g2000cwa.googlegroups.com>
Message-ID: <1hazako.13jtm8o1u3h0z7N%aleaxit@yahoo.com>

Ben Wilson <dausha at gmail.com> wrote:

> Perhaps:
> 
> def dictionary_make_attributes(self, settings):
>      for k,v in settings:
>          setattr(self, k, v)

This is a very general solution and will work for all kinds of objects
with settable attributes, even if some of the attributes are properties,
slots or weirder descriptors yet.

For plain vanilla class instances, though,
  self.__dict__.update(settings)
may be sufficient.


Alex


From gaz082 at gmail.com  Thu Feb 23 11:33:07 2006
From: gaz082 at gmail.com (Gaz)
Date: 23 Feb 2006 08:33:07 -0800
Subject: No (and a meaningless subject here too!)
In-Reply-To: <43fdc8d3$1_2@newspeer2.tds.net>
References: <1140534490.873612.64280@g47g2000cwa.googlegroups.com>
	<dtfhv7$css$1@sea.gmane.org>
	<mailman.2265.1140551970.27775.python-list@python.org>
	<1140619645.303344.317890@g14g2000cwa.googlegroups.com>
	<j-x*9gY-q@news.chiark.greenend.org.uk>
	<1140629467.849254.285410@g43g2000cwa.googlegroups.com>
	<4tjqv1dnpv80m1k412ecjmsncqgsv8quik@4ax.com>
	<1140702045.812136.104980@g43g2000cwa.googlegroups.com>
	<43fdc8d3$1_2@newspeer2.tds.net>
Message-ID: <1140712387.159214.61360@g43g2000cwa.googlegroups.com>

Yeah, i did. Thank you, im analyzing the examples found. I'll post my
results :)



From sbaush at gmail.com  Thu Feb  2 17:58:37 2006
From: sbaush at gmail.com (Sbaush)
Date: Thu, 2 Feb 2006 23:58:37 +0100
Subject: Control if a input text is IP
Message-ID: <fc5d4c490602021458l7665ce6u@mail.gmail.com>

Hi all.
My app has in input an ip address in IPv4 notation.
is there a function that control if input is a string in IPv4 notation?
Thanks all.
bye
--
Sbaush
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From guenter.reusing at web.de  Sat Feb 18 09:55:31 2006
From: guenter.reusing at web.de (Günter Reusing)
Date: Sat, 18 Feb 2006 15:55:31 +0100
Subject: Numpy for PythonCE
Message-ID: <dt7cfi$ta9$1@online.de>

Hi,
is there a version of Numpy (or Numarray) available
that is compatible to PythonCE 2.3? 




From fiazaziz at gmail.com  Wed Feb  1 10:29:24 2006
From: fiazaziz at gmail.com (shaboo)
Date: 1 Feb 2006 07:29:24 -0800
Subject: import datetime
In-Reply-To: <BgSDf.22171$wk5.19626@news02.roc.ny>
References: <1138739342.436000.11290@g44g2000cwa.googlegroups.com>
	<BgSDf.22171$wk5.19626@news02.roc.ny>
Message-ID: <1138807764.118105.218190@g44g2000cwa.googlegroups.com>

It does say Python 2.4.2
~~~~~~~~~~~~~~~~~~~~~~~~
Python 2.4.2 (#2, Jan 30 2006, 20:02:09) [C] on hp-ux11
Type "help", "copyright", "credits" or "license" for more information.
>>>
~~~~~~~~~~~~~~~~~~~~~~~~

I did look at the sys.path but the issue is that I dont see a module
name datetime anywhere. Only datetime thing that is there is in include
directory and it is datetime.h, which I think is for C interface. I
have a python installed on my Windows desktop and it is working fine
there. Where is the datetime module stored? Does any body know?



From lycka at carmen.se  Wed Feb  1 03:07:52 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 01 Feb 2006 09:07:52 +0100
Subject: wxPython Conventions
In-Reply-To: <1138684467.864196.212400@f14g2000cwb.googlegroups.com>
References: <1138684467.864196.212400@f14g2000cwb.googlegroups.com>
Message-ID: <drpq8p$5td$1@wake.carmen.se>

Jared Russell wrote:
> My other question involved the proper location of specific functions.

Never mix business with plea^h^h^h^hGUI. I'd suggest that you write a
Python module with all your business logic that you can test from the
interactive interpreter. Roughly like this:

 >>> import gmailchecker
 >>> def show(text):
...     print text
...
 >>> gmailchecker.login('username', 'password')
 >>> gmailchecker.check(show, 10)

When you build a GUI, you will pass in some bound
method of one of your widgets that will alert the
user instead of the show function above.

This approach makes your code much more useful. You
can use it in other contexts than a small GUI app,
you can swap GUI when you want that, and you can
easily write unit tests for your logic.


From fredrik at pythonware.com  Mon Feb  6 13:25:44 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 6 Feb 2006 19:25:44 +0100
Subject: Question about idioms for clearing a list
References: <mailman.1294.1138727665.27775.python-list@python.org>	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>	<mailman.1489.1139232969.27775.python-list@python.org><pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au>
	<ds83kd$98m$1@sea.gmane.org>
Message-ID: <ds84b9$ch0$1@sea.gmane.org>

Peter Hansen wrote:

> > Perhaps it is arguable that there is no need for a clear method because
> > L[:] = [] is so easy to do. Personally, while I agree that it is easy, it
> > is hardly intuitive or obvious, and I too would prefer an explicit clear
> > method for mutable sequences.
>
> Possibly another case where "patches are welcome"...

so we can have three ways to do the same thing?  the right way to
nuke a sequence is to do "del L[:]".  this is explained in Python 101.

(del doesn't work on dictionaries)

</F>





From steve at holdenweb.com  Mon Feb 20 11:51:29 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 20 Feb 2006 11:51:29 -0500
Subject: How many web framework for python ?
In-Reply-To: <1hb1t62.hp67bf1jzs91cN%aleaxit@yahoo.com>
References: <mailman.2085.1140244423.27775.python-list@python.org>	<43f8718e$0$7344$626a54ce@news.free.fr>	<1hazzon.19mvhkv6sr8wiN%aleaxit@yahoo.com>	<43f9c518$0$3317$636a55ce@news.free.fr>
	<1hb1t62.hp67bf1jzs91cN%aleaxit@yahoo.com>
Message-ID: <dtcs29$9kf$1@sea.gmane.org>

Alex Martelli wrote:
> bruno at modulix <onurb at xiludom.gro> wrote:
> 
> 
>>Alex Martelli wrote:
>>
>>>Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote:
>>>   ...
>>>
>>>>>There are very good web framework for java and ruby ,
>>>>>Is there one for python ?
>>>>
>>>>In fact, there are actually too much *good* python web frameworks.
>>>
>>>Dear Mr. BDFL,
>>>
>>>there are too many good web frameworks nowadays. Please eliminate three.
>>
>>Seems like I should have added a smiley somewhere...
> 
> 
> Naah, smileys unneeded -- you'll notice that my "I am not a crackpot"
> comment was unsmilied either (and nobody nominated it for QOTW, darn!).

Naughty! That's like trying to end a thread by saying "Hitler".

> Having just coincidentally finished wrapping up the 2nd edition's
> Nutshell first draft of the chapter on serverside web programming, after
> a long time researching all the alternatives I've given up on even
> MENTIONING all of the frameworks available, much less providing any
> in-depth coverage, so I'm quite sensitized to the situation!-)
> 
Damn. More reading ...

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From ajones1 at gmail.com  Thu Feb  9 11:57:26 2006
From: ajones1 at gmail.com (ajones)
Date: 9 Feb 2006 08:57:26 -0800
Subject: Too Many if Statements?
In-Reply-To: <1139497550.368476.314060@f14g2000cwb.googlegroups.com>
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<dsaqkj$jhm$1@xenon.Stanford.EDU>
	<GU8Gf.22899$Jd.6095@newssvr25.news.prodigy.net>
	<dscc9e$4mg$1@oravannahka.helsinki.fi>
	<1139465234.569736.140420@f14g2000cwb.googlegroups.com>
	<1139497550.368476.314060@f14g2000cwb.googlegroups.com>
Message-ID: <1139504246.921982.111670@g44g2000cwa.googlegroups.com>


slogging_away wrote:
> Terry Reedy wrote:
>
> > The OP did not specify whether all of his if-tests were sequential as in
> > your test or if some were nested.  I vaguely remember there being an indent
> > limit (40??).
>
> Most of the if statements are nested.  Almost all of them fall under a
> central 'for xxx in range(x,x,x)', (this is the statement that checks
> thorugh each of the saved configuration files).   Under that 'for'
> statment are the bulk of the 'if' statements - some nested and some not
> - some also fall under other 'for' statements.  The indent level does
> not exceed 10..
>

Has anyone considered that this may be part of the issue? If he is
stepping through a range this is not just X if statements but n * x
where n is the number of loops. Possibly some variables that are not
getting freed between loops? (my guess would be that it is related to
logging) Anyways, no expert here, just wanted to point that out.



From dananrg at yahoo.com  Sat Feb 25 08:48:43 2006
From: dananrg at yahoo.com (dananrg at yahoo.com)
Date: 25 Feb 2006 05:48:43 -0800
Subject: Best python module for Oracle, but portable to other RDBMSes
In-Reply-To: <1140826717.186051.261430@i39g2000cwa.googlegroups.com>
References: <1140818561.458171.237850@p10g2000cwp.googlegroups.com>
	<1140826717.186051.261430@i39g2000cwa.googlegroups.com>
Message-ID: <1140875323.918086.44890@i40g2000cwc.googlegroups.com>

Thanks Olivier and Jonathan.

Do either of you, or anyone else, know of a good open source data
modeling / ER-diagram / CASE tools? I'd like to be able to build
relatively simple schemas in one open source tool and be able to create
a database on different platforms as needed (e.g. MySQL, PostgreSQL,
Oracle, etc).

Just wondering what's out there.

Thanks.



From zunbeltz at gmail.com  Thu Feb 16 10:30:28 2006
From: zunbeltz at gmail.com (zunbeltz at gmail.com)
Date: 16 Feb 2006 07:30:28 -0800
Subject: zope 3.2 and imprt errors
Message-ID: <1140103828.129189.37700@o13g2000cwo.googlegroups.com>

Hi,

I've installed zope3.2 froma tarball. It has been installed in
/usrlocal/Zope-3-2. I am developing a package under
~/zope3instance/lib/python/  (which is my instance directory). My
PYTHONPATH
is:

/home/zunbeltz/libs/python/:/usr/local/Zope-3.2.0/lib/python:/home/zunbeltz/zope3instance/lib/python:/home/zunbeltz/pycontrol

I have the following error

Python 2.4.2 (#2, Sep 30 2005, 21:19:01)
[GCC 4.0.2 20050808 (prerelease) (Ubuntu 4.0.1-4ubuntu8)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from zope.app import container
>>> container.interfaces
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'module' object has no attribute 'interfaces'
>> container.interfaces.IContained
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'module' object has no attribute 'interfaces'

the file whre zope.app.container is :

/usr/local/Zope-3.2.0/lib/python/zope/app/container/__init__.pyc

And in this directory there is a module named interfaces

I'm becoming crazy, I don't know where is the problem.
Any idea?
Thanks in advance

Zunbeltz



From fredrik at pythonware.com  Fri Feb  3 12:11:20 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 3 Feb 2006 18:11:20 +0100
Subject: newbie - script works in PythonWin - fails from Python
References: <1138960717.927268.22640@g44g2000cwa.googlegroups.com><1138961665.684357.78060@g44g2000cwa.googlegroups.com><1138962543.290178.77790@g47g2000cwa.googlegroups.com><pan.2006.02.03.11.04.13.213569@REMOVETHIScyber.com.au><1138978837.557550.144350@f14g2000cwb.googlegroups.com>
	<y80ssbu4.fsf@python.net>
Message-ID: <ds02rr$5rj$1@sea.gmane.org>

Thomas Heller wrote:

> > This is all I get:
> >
> > error 250477278
> > Traceback (most recent call last):
> >   File "script1.py", line 5, in ?
> >     Inst = lib.Initialize(0)
> > WindowsError: exception code 0xeedfade
> >
> > I get this when running python.exe script1.py
> >
> > ** When run from inside PythonWin it runs beautifully and returns with
> > no errors **
> >
> > Regardless of what the error actually is it *works* when run from
> > PythonWin.  It fails only when run from the command line.  I'm trying
> > to find out why there is a difference.  Clearly both either run a
> > different interpreter or with different switches.  I was hoping someone
> > knows what the difference is.
>
> One difference is that PythonWin runs a messageloop.  Does the
> documentation of the library you call say something about the error code
> you get?

a quick googling indicates that 0xEEDFADE is usually caused by an
internal unhandled exception in Delphi.  maybe there's some Borland-
specific DLL that's not found when the code is running from the con-
sole ?

I suppose you could use process explorer to see if you can figure out
what Borland DLL:s the program is using:

    http://www.sysinternals.com/ProcessesAndThreadsUtilities.html

</F>





From michele.petrazzo at TOGLIunipex.it  Thu Feb 16 03:58:43 2006
From: michele.petrazzo at TOGLIunipex.it (Michele Petrazzo)
Date: Thu, 16 Feb 2006 09:58:43 +0100
Subject: ANN: FreeImagePy 1.2.2
Message-ID: <43f43ec3$0$29107$5fc30a8@news.tiscali.it>

FreeImagePy 1.2.2 is available at freeimagepy.sf.net

What is?
   It' a python wrapper for FreeImage, Open Source library for developers
    who would like to support popular graphics image formats.

How work?
   It use a binary freeimage library present on the system and ctypes.

Major changes from 1.2.0:
  New convertToPil function:
   i = FreeImagePy.Image("myImage.ext")
   pil = i.convetToPil()
  Some bugs solved

Michele Petrazzo


From steve.horsley at gmail.com  Fri Feb 10 18:06:35 2006
From: steve.horsley at gmail.com (Steve Horsley)
Date: Fri, 10 Feb 2006 23:06:35 +0000
Subject: Daemon terminates unexpected
In-Reply-To: <mailman.1473.1139219916.27775.python-list@python.org>
References: <mailman.1473.1139219916.27775.python-list@python.org>
Message-ID: <dsj69q$upd$1@news.freedom2surf.net>

Incorporating Fredrik's fix (I learned something new reading 
that), try using an endless loop even if there is an exception 
like this:

     def run(self):
         while True:
             try:
                 <start an SMTP-Server
                 asyncore.loop()
             except:
                 e = sys.exc_value()
                 <write exception in log>
                 <kill the SMTP server off>
                 time.sleep(60)	# wait, avoid spinning

so that even if there is an exception, it'll get up and go again.

Steve


From steve at REMOVETHIScyber.com.au  Sun Feb  5 06:08:02 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sun, 05 Feb 2006 22:08:02 +1100
Subject: Generators vs. Functions?
References: <0001HW.C00ABC2B000323A6F0335550@news.individual.de>
	<43E50E73.40504@kzoo.edu>
	<mailman.1426.1139097119.27775.python-list@python.org>
	<gkeFf.434944$2k.218378@pd7tw1no>
	<pan.2006.02.05.08.14.28.103057@REMOVETHIScyber.com.au>
	<mailman.1430.1139129374.27775.python-list@python.org>
Message-ID: <pan.2006.02.05.11.08.01.374463@REMOVETHIScyber.com.au>

On Sun, 05 Feb 2006 09:49:21 +0100, Fredrik Lundh wrote:

> Steven D'Aprano wrote:
> 
>> So on the basis of my tests, there is a small, but significant speed
>> advantage to _calling_ a function versus _resuming_ a generator.
> 
> now add state handling to your micro-benchmark, and see if the function
> example still runs faster.

?Que Mr Fawlty?

Sorry, I'm not sure I follow what you mean. Do you mean, "Make the
function and generator do something significant"?

I expected that people would understand that I was talking only about the
overhead of calling the function or generator, not the overall time needed
to perform some useful task. Sorry for the less than clear explanation.


> (hint: functions and generators do different things, and are designed
> for different use cases.  they're not two different ways to do the same
> thing, and benchmarks that ignore that simple fact are pretty much use-
> less, except, perhaps, for a very small group of VM developers.)

I never meant to imply that generators were somehow "worse" than
functions. As you say, they have different purposes, and for the sort of
use case that generators are good for, the tiny extra overhead in
restoring a generator is a cost well worth paying.

But it is a cost. I personally don't believe it is a significant cost,
except maybe for the odd special case or two. 


-- 
Steven.



From durumdara at gmail.com  Wed Feb 22 07:00:32 2006
From: durumdara at gmail.com (Durumdara)
Date: Wed, 22 Feb 2006 13:00:32 +0100
Subject: Path (graph) shower utility
Message-ID: <43FC5260.3090308@gmail.com>

Hi !

I need to create a program that read eml file headers, analyze the
receive tags and create a path database. I finished with this program
section.

But I want to show a graphical summary about the paths.

This is (what I want to show) like a graph - show ways, stations, etc,
and I want to show the strength of lines (how many of mails use this way).

Can anyone known about a freeware tool, software, or python module that
can show graphs with best alignments ?

Please help me. Thanx for it:
dd


Ps:
The OS is Windows XP:
I tryed with pydot, but this code created many 0 length files.

import pydot

print pydot.find_graphviz()

edges=[(1,2), (1,3), (1,4), (3,4)]
g=pydot.graph_from_edges(edges)
g.write_svg('graph_from_edges_dot.svg', prog='dot')
g.write_svg('graph_from_edges_neato.svg', prog='neato')
g.write_jpeg('graph_from_edges_dot.jpg', prog='dot')
g.write_jpeg('graph_from_edges_neato.jpg', prog='neato')

 >>>

{'fdp': 'c:\\Program Files\\ATT\\Graphviz\\bin\\fdp.exe', 'twopi': 
'c:\\Program Files\\ATT\\Graphviz\\bin\\twopi.exe', 'neato': 
'c:\\Program Files\\ATT\\Graphviz\\bin\\neato.exe', 'dot': 'c:\\Program 
Files\\ATT\\Graphviz\\bin\\dot.exe', 'circo': 'c:\\Program 
Files\\ATT\\Graphviz\\bin\\circo.exe'}


Thanx for help: dd




From hancock at anansispaceworks.com  Tue Feb 14 03:27:46 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Tue, 14 Feb 2006 02:27:46 -0600
Subject: hard disk activity
In-Reply-To: <7xbqxb0xo0.fsf@ruckus.brouhaha.com>
References: <1139850420.902979.71620@o13g2000cwo.googlegroups.com>
	<g9i1v1lbf2rhmgskmkh5f9mt73s67umckk@4ax.com>
	<1139857505.376840.37440@g43g2000cwa.googlegroups.com>
	<1139859890.407497.124870@o13g2000cwo.googlegroups.com>
	<1139863885.755813.324450@g47g2000cwa.googlegroups.com>
	<7xfymn0yda.fsf@ruckus.brouhaha.com>
	<1139864840.300396.170070@o13g2000cwo.googlegroups.com>
	<7xbqxb0xo0.fsf@ruckus.brouhaha.com>
Message-ID: <20060214022746.2c4d8001@samwise.anansi>

On 13 Feb 2006 13:13:51 -0800
Paul Rubin <"http://phr.cx"@NOSPAM.invalid> wrote:
> "VSmirk" <vania.smirk at gmail.com> writes:
> > Aweseme!!!  I got as far as segmenting the large file on
> > my own, and I ran out of ideas.  I kind of thought about
> > checksum, but I never put the two together.
> > 
> > Thanks.  You've helped a lot....
> 
> The checksum method I described works ok if bytes change
> in the middle of the file but don't get inserted (piecs of
> the file don't move around).  If you insert on byte in the
> middle of a 1GB file (so it becomes 1GB+1 byte) then all
> the checksums after the middle block change, which is no
> good for your purpose.

But of course, the OS will (I hope) give you the exact
length of the file, so you *could* assume that the beginning
and end are the same, then work towards the middle.
Somewhere in between, when you hit the insertion point, both
will disagree, and you've found it.  Same for deletion.

Of course, if *many* changes have been made to the file,
then this will break down. But then, if that's the case,
you're going to have to do an expensive transfer anyway, so
expensive analysis is justified.

In fact, you could proceed by analyzing the top and bottom
checksum lists at the point of failure -- download that
frame, do a byte by byte compare and see if you can derive
the frameshift. Then compensate, and go back to checksums
until they fail again.  Actually, that will work just coming
from the beginning, too.

If instead, the region continues to be unrecognizeable to
the end of the frame, then you need the next frame anyway.

Seems like it could get pretty close to optimal (but we
probably are re-inventing rsync).

Cheers,
Terry

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From elezarsimeonpapo at yahoo.com  Wed Feb  8 03:53:06 2006
From: elezarsimeonpapo at yahoo.com (Elezar Simeon Papo)
Date: 8 Feb 2006 00:53:06 -0800
Subject: tricky regular expressions
In-Reply-To: <1139355032.160544.117110@g43g2000cwa.googlegroups.com>
References: <1139343779.721205.221410@f14g2000cwb.googlegroups.com>
	<1139351528.999976.205430@g43g2000cwa.googlegroups.com>
	<1139355032.160544.117110@g43g2000cwa.googlegroups.com>
Message-ID: <1139388785.993535.290080@g43g2000cwa.googlegroups.com>

I had a somewhat similar problem that got solved with a line-based
state machine parser.
Cheers,



Elezar
=================================
Wiki Dictionary - Bosnian/Croatian/Serbian
http://izraz.com/%C4%8Cengi%C4%87_vila



From dprovins at rpcl.com  Fri Feb 24 10:14:49 2006
From: dprovins at rpcl.com (Dean Allen Provins)
Date: Fri, 24 Feb 2006 15:14:49 GMT
Subject: Tkinter canvas size determination
In-Reply-To: <lvjuc3-ph7.ln1@lairds.us>
References: <43FC9532.2050800@rpcl.com> <lvjuc3-ph7.ln1@lairds.us>
Message-ID: <43FF22FB.5000407@rpcl.com>

Cameron:

Cameron Laird wrote:
> In article <43FC9532.2050800 at rpcl.com>,
> Dean Allen Provins  <dprovins at rpcl.com> wrote:
> 
>>I need to determine the size of a canvas while the process is running.
>>Does anyone know of a technique that will let me do that?
> 
> 			.
> 			.
> 			.
> Does
>   >>> import Tkinter
>   >>> c = Tkinter.Canvas()
>   >>> c.create_oval(13, 51, 80, 130)
>   1
>   >>> c.pack()
>   >>> print c.cget("width")
>   284
> help?
> 
> There are actually several different notions of the size of a
> canvas.  The example abovve should be a good starting point,
> though.  
> 
> There's also a mailing list specifically for Tkinter <URL:
> http://tkinter.unpythonic.net/wiki/mailing_20lists  >; that
> might interest you.

I tried the "cget" function, and it returned the width that I had used
when creating the canvas - even though the canvas was wider than that
value at display time (and also after manually resizing the window).

To your knowledge, is there a method to determine the current dimensions?

Thanks,

Dean


From ahaas at airmail.net  Thu Feb  2 14:12:40 2006
From: ahaas at airmail.net (Art Haas)
Date: Thu, 2 Feb 2006 13:12:40 -0600
Subject: [ANNOUNCE] Twenty-eighth release of PythonCAD now available
Message-ID: <20060202191240.GK11891@artsapartment.org>

Hi.

I'm pleased to announce the twenty-eighth development release of PythonCAD,
a CAD package for open-source software users. As the name implies,
PythonCAD is written entirely in Python. The goal of this project is
to create a fully scriptable drafting program that will match and eventually
exceed features found in commercial CAD software. PythonCAD is released
under the GNU Public License (GPL).

PythonCAD requires Python 2.2 or newer. The interface is GTK 2.0
based, and uses the PyGTK module for interfacing to GTK. The design of
PythonCAD is built around the idea of separating the interface
from the back end as much as possible. By doing this, it is hoped
that both GNOME and KDE interfaces can be added to PythonCAD through
usage of the appropriate Python module. Addition of other PythonCAD 
interfaces will depend on the availability of a Python module for that
particular interface and developer interest and action.

The twenty-eighth release of PythonCAD offers improved abilities to
edit entities in a drawing. Previous releases had inconsistent behavior
for entity modification as some operations first required selecting
then entities to change and then selecting the operation to perform,
where other changes were accomplished by first selecting the action and
then selecting entities. The latest release allows for entity modifications
to be performed in either mode, thus making the code more consistent
as well as easier to use. For people familiar with AutoCAD, PythonCAD now
has 'NOUN->VERB' and 'VERB->NOUN' entity modification behavior. Numerous
internal changes to the code utilizing more current functionality are also
included in this release, in particular a rewrite of the entity moving code.
Also, the ability to adjust the attributes of the text objects in a
Dimension have been improved as well as simplified. And as usual, a wide
number of bug fixes and other code enhancements are present in the release.

A mailing list for the development and use of PythonCAD is available.
Visit the following page for information about subscribing and viewing
the mailing list archive:

http://mail.python.org/mailman/listinfo/pythoncad

Visit the PythonCAD web site for more information about what PythonCAD
does and aims to be:

http://www.pythoncad.org/

Come and join me in developing PythonCAD into a world class drafting
program!

Art Haas
-- 
Man once surrendering his reason, has no remaining guard against absurdities
the most monstrous, and like a ship without rudder, is the sport of every wind.

-Thomas Jefferson to James Smith, 1822


From anon at nospam.nospam  Sun Feb  5 10:41:51 2006
From: anon at nospam.nospam (anon)
Date: Sun, 5 Feb 2006 10:41:51 -0500
Subject: Importing a class, please help...
Message-ID: <a1pFf.138$CO7.124@fe02.lga>

Hi,

Newbie to Python and I have a question please.  I am using Windows XP, SPE 
0.8.2.a and Python24.  I have done this:

import sys
print sys.path

no problem there, sys imports just fine.  I have a folder that I called 
c\JavaProjects\PythonTesting and it shows up in the output from sys.path 
above.  I have dropped a very simple Jar in that folder and I have attempted 
to do an Import on it.  This is where things fail.  I cannot see the 
contents of my Jar.  What am I missing here?

Would somebody please drop me a hint, please?  I would HIGHLY appreciate an 
example; does anybody know of a website or page that would show me how to do 
this?  I realize this is a simple question and I appreciate any help 
somebody would give me.

Regards,
joe 




From grante at visi.com  Sun Feb  5 09:37:44 2006
From: grante at visi.com (Grant Edwards)
Date: Sun, 05 Feb 2006 14:37:44 -0000
Subject: Best way of finding terminal width/height?
References: <96nFf.43896$d5.199922@newsb.telia.net>
Message-ID: <11uc3dohfitotc5@corp.supernews.com>

On 2006-02-05, Joel Hedlund <joel.hedlund at gmail.com> wrote:

> I use python for writing terminal applications and I have been
> bothered by how hard it seems to be to determine the terminal
> size. What is the best way of doing this?

The way used in the code you found. Alternatively, yould use
ncurses, but that's massive overkill if all you want is the
terminal window size.

> At the end I've included a code snippet from Chuck Blake 'ls'
> app in python. It seems to do the job just fine on my comp,
> but regrettably, I'm not sassy enough to wrap my head around
> the fine grain details on this one.

Which details?  We'd be happy to explain the code.  Not that
you need to understand the details to use the code.

> How cross-platform is this?

It will work on any Unix system you're likely to encounter.  I
know it works on BSD, Solaris, and Linux.  I no longer yave
acces to a v7 system, but I'm pretty sure it would have worked
on that as well -- except the one I used didn't have a large
enough address space or disk drive to run Python.

I don't know if it will work on MS Windows or not.

> Is there a more pythonic way of  doing this?

What's unpythonic about the example you found?  It looks
extremely pythonic to me. The use of the "or" operator when
making ioctl calls and the try/except block when opening a file
is classically pythonic.

> Say something like:
>
> from ingenious_module import terminal_info
> cols, rows = terminal_info.size()

If that's what you want, put the code you found in to a file
named "ingenious_module.py".  I don't see the point of of
layering the namespace like that, though.  Just call it
terminal_info.py and do

import terminal_info
cols,rows = terminal_info.terminal_size()

-- 
Grant Edwards                   grante             Yow!  Oh, FISH sticks,
                                  at               CHEEZ WHIZ, GIN fizz,
                               visi.com            SHOW BIZ!!


From kylotan at gmail.com  Tue Feb  7 05:02:42 2006
From: kylotan at gmail.com (Ben Sizer)
Date: 7 Feb 2006 02:02:42 -0800
Subject: Question about idioms for clearing a list
In-Reply-To: <1139300825.858426.12680@o13g2000cwo.googlegroups.com>
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>
Message-ID: <1139306562.105655.23200@f14g2000cwb.googlegroups.com>

Raymond Hettinger wrote:
> [Steven D'Aprano]
> > > The Zen isn't "only one way to do it". If it were, we
> > > wouldn't need iterators, list comps or for loops,
> > > because they can all be handled with a while loop (at
> > > various costs of efficiency, clarity or obviousness).
> > >
> > > del L[:] works, but unless you are Dutch, it fails the
> > > obviousness test.
>
> [Fredrik Lundh]
> > unless you read some documentation, that is.  del on sequences
> > and mappings is a pretty fundamental part of Python.  so are slicings.
> >
> > both are things that you're likely to need and learn long before you
> > end up in situation where you need to be able to clear an aliased
> > sequence.
>
> Fred is exactly correct.  Slicing is absolutely basic to Python.
> Accordingly, it gets covered right at the beginning of the tutorial
> (section 3.1).

Yes, right after UTF encoding details, complex numbers, and various
mentions of shell scripts. I don't want to criticise the hard work that
went into making the tutorial but let's not pretend it's the epitome of
documentation or even necessary the most obvious reference for users.

> Likewise, the del keyword is fundamental -- if you
> can't get, set, and del, then you need to go back to collections
> school.

I have hardly used the del keyword in several years of coding in
Python. Why should it magically spring to mind in this occasion?
Similarly I hardly ever find myself using slices, never mind in a
mutable context.

del L[:] is not obvious, especially given the existence of clear() in
dictionaries. I'm not necessarily requesting a clear() method, but I am
requesting a little more understanding towards those who expected one.
The list interface is full of redundant convenience methods, so one
more would hardly be a surprise or an unreasonable thing for people to
expect. Again we unfortunately have a bit of an attitude problem
towards anyone posting here that doesn't know whatever the experts
think is obvious.

-- 
Ben Sizer



From bj_666 at gmx.net  Wed Feb 15 18:38:08 2006
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 16 Feb 2006 00:38:08 +0100
Subject: Pythonic gui format?
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<43f11990$0$667$626a54ce@news.free.fr>
	<a9KdnTPXHOGOr2zenZ2dnUVZ_vidnZ2d@comcast.com>
	<43f19d88$0$4761$636a55ce@news.free.fr>
	<HrKdnTDaI9YCfmzeRVn-pg@comcast.com>
	<43f1e5c1$0$4756$636a55ce@news.free.fr>
	<t9mdncjHu9hxE2_eRVn-oA@comcast.com>
Message-ID: <pan.2006.02.15.23.38.07.315819@gmx.net>

In <t9mdncjHu9hxE2_eRVn-oA at comcast.com>, DH wrote:

>> And what about true vs True and false vs False ?-)
> 
> The syntax is the same, except for, as I said, JSON's multiline comments.
> The semantics do differ, but that has nothing to do with the user's
> question, about an alternative to XML for data representation.  You
> can use "true" or True or "null" or None or whatever semantic values
> you want.

You can't use `True`, `False` and `None` in JSON documents.  And strings
are delimited by `"` and not `'`.  The `\x??` escape is forbidden in
strings and it's not allowed to leave out a leading zero in numbers, nor
is it allowed to start a number with a unary `+`.

Ciao,
	Marc 'BlackJack' Rintsch


From keith.b.perry at gmail.com  Tue Feb 21 14:15:36 2006
From: keith.b.perry at gmail.com (kbperry)
Date: 21 Feb 2006 11:15:36 -0800
Subject: Zope 3?? How do you start it on Windows?
In-Reply-To: <dtfmpn$n45$1@wake.carmen.se>
References: <1140496495.019513.161010@z14g2000cwz.googlegroups.com>
	<43fadafe$0$38624$edfadb0f@dread12.news.tele.dk>
	<1140532195.134688.57960@g43g2000cwa.googlegroups.com>
	<dtfmpn$n45$1@wake.carmen.se>
Message-ID: <1140549336.624833.315340@g44g2000cwa.googlegroups.com>

Many good points!  Thx Matt.



From bonono at gmail.com  Tue Feb 14 21:54:14 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 14 Feb 2006 18:54:14 -0800
Subject: Newbie
In-Reply-To: <3CwIf.16100$7C3.13881@trnddc08>
References: <v3JHf.2731$lo3.2501@trnddc07><HZJHf.2737$lo3.1139@trnddc07>
	<mailman.1926.1139963961.27775.python-list@python.org>
	<3CwIf.16100$7C3.13881@trnddc08>
Message-ID: <1139972054.680568.260950@g14g2000cwa.googlegroups.com>

This is top posting, i.e. my post is above yours. For this particular
response, it seems to be a bit more appropriate to do bottom posting,
see below. However, don't take that as a rule or convention that you
need to do one or another exclusively, it depends and I believe mature
and sincere posters would know when to do which.

LittlePython wrote:
> I have no idea what top-posting or bottom-posting is?
This is bottom posting, where people can refer to what I am answering
to, right above this line/paragraph.



From markleeds at verizon.net  Sat Feb 25 01:05:47 2006
From: markleeds at verizon.net (MARK LEEDS)
Date: Fri, 24 Feb 2006 22:05:47 -0800
Subject: mimicing pg 398 of practical python
References: <002f01c639d0$c6a264b0$2f01a8c0@m8d4477f3de884>
Message-ID: <001b01c639d1$85eda550$2f01a8c0@m8d4477f3de884>

i should have mentioned that i am on linux
and using python 2.4. my apologies.

  ----- Original Message ----- 
  From: MARK LEEDS 
  To: python-list at python.org 
  Sent: Friday, February 24, 2006 10:00 PM
  Subject: mimicing pg 398 of practical python


  I am trying to duplicate the sunspots graph on page 398 of Practical Python. I don''t
  have those reportlab modules so i downloaded them from their website  and tried to put them somewhere
  ( not clear where i should  put them ) and then i added that place to my sys.path
  by doig sys.path.append inside the same program. but, i still got the error that
  it doesn't know about thsis module ?

  does anyone have really good directions on how to download the reportlab stuff
  so that it works. the book, practical python is amazing but this part is a little
  unclear. thanks a lot.

  or maybe thre is an easier graphics package to use that is already inside python.
  i'm a beginner. thanks.


                                                              mark


------------------------------------------------------------------------------


  -- 
  http://mail.python.org/mailman/listinfo/python-list
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From python.list at tim.thechases.com  Wed Feb  8 15:29:50 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Wed, 08 Feb 2006 14:29:50 -0600
Subject: breadth first search
In-Reply-To: <015601c62cd6$232f3e40$6601a8c0@homexp>
References: <43ea2271$1@127.0.0.1>
	<mailman.1604.1139419171.27775.python-list@python.org>
	<015601c62cd6$232f3e40$6601a8c0@homexp>
Message-ID: <43EA54BE.4040800@tim.thechases.com>

> Thanks for your reply and the structure of the file structure going to be
> read is
> 
> <total number of nodes>
> <first node><second node><distance from first node to second node>
> ...
> <end of file represented by -1>
> 
> The aims is to find out the shortest path(s) for the leaf node(s)
> 
> Example:
> 9
> 0 1 1
> 0 4 2
> 1 2 3
> 1 3 4
> 4 3 2
> 4 5 1
> 4 8 2
> 5 6 2
> 5 7 2
> -1
> 
> Output:
> Possible solutions:
> Path=0,1,2 length=4
> Path=0,4,3 length=4

Well, I notice several items here:

1)  the number of records is obvious, as you have newlines
2)  the end-of-file is obvious to Python
3)  you don't explicitly spell out which nodes are availble 
leaf-nodes

To build a tree like your data provides, you might have some code 
like

data = open("data.txt","r")
lines = [line[:-1] for line in data.readlines()[1:-1]]
data.close()
graph = {}
for line in lines:
     a,b,weight = line.split(" ",2)
     weight = int(weight)
     if a in graph:
         graph[a][b] =(weight)
     else:
         graph[a] = {b:weight}

print repr(graph)

You can then navigate this graph/tree.  Starting at the root node:

	root = graph("0")

root now contains a dictionary.  The keys in this dictionary 
specify which nodes can be reached from the current location, and 
the values of the dictionary represent the weight/cost associated 
with traversing to this node.

You can then do a breadth-first search of this data structure 
just as you would in any other language.  It doesn't look like it 
would be a straight-forward breadth-first search, as it looks 
like you want to take the weight into account as well as the 
number of steps from the root.

-tkc

PS:  you should CC the list when you reply, as I certainly don't 
have all the answers, and there are others on the mailing list 
that can point out better ways to do things, have other ideas, or 
be there more predictable than I am (otherwise, you may mail 
something and I might not get it for a week)









From tchur at optushome.com.au  Wed Feb  8 15:14:30 2006
From: tchur at optushome.com.au (Tim Churches)
Date: Thu, 09 Feb 2006 07:14:30 +1100
Subject: Python and the health of the public
In-Reply-To: <d5hxlpxs.fsf@python.net>
References: <43e8c2ae$1@news.bezeqint.net>	<43e8f3eb$0$7988$9b622d9e@news.freenet.de>	<43e99e5e@news.bezeqint.net>
	<d5hxlpxs.fsf@python.net>
Message-ID: <43EA5126.7090201@optushome.com.au>

The use of Python in a public health surveillance system is described
here (see references 15 and 26):
http://www.biomedcentral.com/1471-2458/5/141

Some more papers describing Python's starring role in some other public
health projects should appear in the next several months.

Tim C





From dananrg at yahoo.com  Fri Feb 24 17:08:15 2006
From: dananrg at yahoo.com (dananrg at yahoo.com)
Date: 24 Feb 2006 14:08:15 -0800
Subject: Multiple versions of Python / PythonWin on the same machine?
Message-ID: <1140818895.436107.261820@p10g2000cwp.googlegroups.com>

I have Python 2.1 / PythonWin 2.1 installed on my machine because I
need it for use with ESRI's ArcGIS Desktop software, but I want to play
with a more recent version of Python.

Is it safe to install more than one version of Python / PythonWin on
the same machine? I don't want the latest release to wipe out the old
one.



From sjuranic at gmail.com  Sun Feb 26 17:30:11 2006
From: sjuranic at gmail.com (Steve Juranich)
Date: Sun, 26 Feb 2006 15:30:11 -0700
Subject: TypeError when subclassing 'list'
References: <1140992122.723907.263990@z34g2000cwc.googlegroups.com>
Message-ID: <dtta52$bmp$1@sea.gmane.org>

Gerard Flanagan wrote:

> Hello all
> 
> Could anyone shed any light on the following Exception? The code which
> caused it is below.  Uncommenting the 'super' call in 'XmlNode' gives
> the same error. If I make XmlNode a subclass of 'object' rather than
> 'list' then the code will run.
...
> Code:
> 
> from elementtree.SimpleXMLWriter import XMLWriter
> 
> class XmlNode(list):
>     tag = None
>     attrib = None
>     value = None
>     def __init__(self, tag, **attrib):
>         #super(list, self).__init__()
>         self.tag = tag
>         self.attrib = attrib

I haven't put a lot of study into what you've done, but right off the bat,
your use of "super" is incorrect.  It should look like:

  super(XmlNode, self).__init__()

Not sure if that will fix your problem, though.

-- 
Steve Juranich
Tucson, AZ
USA



From siona at chiark.greenend.org.uk  Thu Feb  9 07:54:04 2006
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 09 Feb 2006 12:54:04 +0000 (GMT)
Subject: apostrophe or double quote?
References: <1139370460.360400.232500@z14g2000cwz.googlegroups.com>
	<1139413150.237052.47320@o13g2000cwo.googlegroups.com>
	<17386.12524.935119.641171@montanaro.dyndns.org>
	<mailman.1635.1139441911.27775.python-list@python.org>
Message-ID: <0hu*B7S+q@news.chiark.greenend.org.uk>

Terry Hancock  <hancock at anansispaceworks.com> wrote:
>skip at pobox.com wrote:
>> Just to present a complete picture, not mentioned in this
>> thread are triple-quoted strings:
>> [ ... ]
>Also in the mode of beating a dead horse ... ;-)
>
>Some people prefer to use single quotes for 'labels' (i.e. a
>name which is meaningful to the program, but not to the
>user), and reserve either double-quotes or
>triple-double-quotes for text to be shown to the user.
> [ ... ]

Hmm, I made both these points a couple of posts upthread, but
it didn't appear to get through the news->mail gateway.

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From reply.in.the.newsgroup at my.address.is.invalid  Sun Feb  5 13:14:34 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Sun, 05 Feb 2006 19:14:34 +0100
Subject: Get System Date?
References: <1139161771.537069.181010@g44g2000cwa.googlegroups.com>
Message-ID: <g2gcu1565oi6mc3nd37n3p4q98dohfjmj8@4ax.com>

Dustan:
>Is it possible to get the system date on a Windows XP machine?

Most certainly:
http://www.python.org/doc/lib/module-time.html

-- 
Ren? Pijlman


From andre.roberge at gmail.com  Tue Feb  7 09:35:45 2006
From: andre.roberge at gmail.com (=?iso-8859-1?B?QW5kcuk=?=)
Date: 7 Feb 2006 06:35:45 -0800
Subject: Question about idioms for clearing a list
In-Reply-To: <mailman.1546.1139320907.27775.python-list@python.org>
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>
	<mailman.1546.1139320907.27775.python-list@python.org>
Message-ID: <1139322945.408360.143690@g43g2000cwa.googlegroups.com>

Ed Singleton wrote:
>
> I'm a fairly average programmer (better than average compared to my
> immediate colleagues).  I've read every tutorial I can get my hands
> on, but I have no _memory_  of ever coming across the del keyword, let
> alone that it is fundamental to Python, and I have no idea what
> collections school is.  I doubtless have read of it at some point, but
> as no importance has ever been attached to it, I have probably not
> remembered it.
>
I'm probably below average as a programmer, except when compared with
my immediate colleagues [1].  I wrote an extremely simple (albeit
non-conventional) tutorial on learning how to program with Python,
partly as a means to learn Python myself.  (Google for rur-ple if you
are curious.)  I introduced del shortly after I introduced lists.  I
think it is important that one learns at least a couple of example
usage of every Python keyword as soon as possible, before attempting to
write complicated programs.  The same probably goes for built-in
functions.

Andr?

[1] Because I have none.



From sigzero at gmail.com  Sat Feb 11 16:33:11 2006
From: sigzero at gmail.com (Robert Hicks)
Date: 11 Feb 2006 13:33:11 -0800
Subject: Is python very slow compared to C
In-Reply-To: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
Message-ID: <1139693591.528295.64930@g47g2000cwa.googlegroups.com>

Most languages are slow compared to "C". Python is fast enough for just
about anything you want to do with it.

Robert



From vivainio at gmail.com  Fri Feb 17 07:51:20 2006
From: vivainio at gmail.com (vivainio at gmail.com)
Date: 17 Feb 2006 04:51:20 -0800
Subject: Evil, evil wxPython (and a glimmer of hope)
References: <1140116551.116322.12680@g43g2000cwa.googlegroups.com>
	<8764ned5ib.fsf@rose.polar.local>
	<1140162638.200378.199010@g44g2000cwa.googlegroups.com>
	<1140174946.948658.186160@g47g2000cwa.googlegroups.com>
Message-ID: <1140180680.326797.69740@g43g2000cwa.googlegroups.com>

Fuzzyman wrote:

> The code is relatively simple - so it would be easy to maintain the
> parts you use if that was necessary. Certainly easier than duplicating
> it yourself from scratch. :-)

Sounds convincing, I'll give it a shot after all.



From webraviteja at gmail.com  Wed Feb 22 09:51:34 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 22 Feb 2006 06:51:34 -0800
Subject: What's happened to Jython?
In-Reply-To: <1140614051.937964.11670@g47g2000cwa.googlegroups.com>
References: <1140614051.937964.11670@g47g2000cwa.googlegroups.com>
Message-ID: <1140619894.170804.76460@g47g2000cwa.googlegroups.com>

According to
http://sourceforge.net/project/showfiles.php?group_id=12867
The last release of 2.2a was on July 17, 2005 - about 7 months.



From tzot at sil-tec.gr  Fri Feb 10 04:18:33 2006
From: tzot at sil-tec.gr (Christos Georgiou)
Date: Fri, 10 Feb 2006 11:18:33 +0200
Subject: Detecting filename-encoding (on WinXP)?
References: <1138896194.914220.60080@o13g2000cwo.googlegroups.com>
Message-ID: <9amou1t8ld8ms4466q8m6o0jlk7shm43k7@4ax.com>

On 2 Feb 2006 08:03:14 -0800, rumours say that "Tim N. van der Leeuw"
<tim.leeuwvander at nl.unisys.com> might have written:

>So now what I need to know is, how do I find out in what encoding a
>particular filename is? Is there a portable way for doing this?

You said the filename comes as data, and not as contents of os.listdir(),
right?

You can only know (for almost certain) what encoding is *not* the filename
(by looping over encodings and marking those where .decode fails).  

If it was textual data, you could be more successful in guessing (btw, it's
been a long time since I requested example texts from various encodings for
my encoding-guessing app, but I was sent only one) by testing characters in
pairs and their frequencies.
-- 
TZOTZIOY, I speak England very best.
"Dear Paul,
please stop spamming us."
The Corinthians


From joel.hedlund at gmail.com  Thu Feb  9 03:24:27 2006
From: joel.hedlund at gmail.com (Joel Hedlund)
Date: Thu, 09 Feb 2006 09:24:27 +0100
Subject: Best way of finding terminal width/height?
In-Reply-To: <43E8659D.6010101@gmail.com>
References: <96nFf.43896$d5.199922@newsb.telia.net>
	<11uc3dohfitotc5@corp.supernews.com>
	<jysFf.155352$dP1.513537@newsc.telia.net>
	<11udc0r2bq11042@corp.supernews.com> <43E719EE.3040401@gmail.com>
	<11ueq4nhn91qm91@corp.supernews.com> <43E8659D.6010101@gmail.com>
Message-ID: <dsetvj$hoa$1@news.lysator.liu.se>

I realised there was funny indentation mishap in my previus email. My mail prog indented the following line 

    signal.signal(signal.SIGWINCH, report_terminal_size_change)

while in fact in IDLE it's unindented, which makes a lot more sense:

signal.signal(signal.SIGWINCH, report_terminal_size_change)

Sorry about that.

/Joel

Joel Hedlund wrote:
>> You might want to try just setting a flag in the signal handler
>> to see if that prevents the I/O operations on stdin/stdout from
>> being interrupted.
> 
> 
> Tried this:
> 
> <source>
> 
> import signal, os, sys
> from terminal_info import get_terminal_size
> 
> terminal_size = get_terminal_size()
> 
> _bTerminalSizeChanged = False
> 
> def report_terminal_size_change(signum, frame):
>    global _bTerminalSizeChanged
>    _bTerminalSizeChanged = True
> 
> def update_terminal_size():
>    global _bTerminalSizeChanged, terminal_size
>    terminal_size = get_terminal_size()
>    _bTerminalSizeChanged = False
>    signal.signal(signal.SIGWINCH, report_terminal_size_change)
> 
> while True:
>    # Do lots of IO (I'm trying to provoke exceptions with signal)
>    open('/a/large/file').read()
>    #raw_input()
>    #sys.stdin.read()
>    #print open('/a/large/file').read()
>       if _bTerminalSizeChanged:
>        update_terminal_size()
>        print terminal_size
> 
> </source>
> 
> As before, the only IO case above that doesn't throw exceptions is the 
> uncommented one.
> 
>> Yup, that's the exception.  Standard practice is to catch it and
>> retry the I/O operation.
> 
> 
> Hmm... I guess it's not that easy to "retry" IO operations on pipes and 
> streams (stdin/stdout in this case)... And I tend to lean pretty heavily 
> on those since I usually write UNIX style text "filters".
> 
> So in case I haven't missed something fundamental I guess my best option 
> is to accept defeat (of sorts :-) and be happy with picking a terminal 
> width at program startup.
> 
> But anyway, it's been really interesting trying this out.
> Thank you Grant (och Jorgen) for all help and tips!
> /Joel


From gregory.petrosyan at gmail.com  Thu Feb 23 19:04:46 2006
From: gregory.petrosyan at gmail.com (Gregory Petrosyan)
Date: 23 Feb 2006 16:04:46 -0800
Subject: What's up with this code?
References: <1140649331.924736.128420@g43g2000cwa.googlegroups.com>
	<43fd08cf$1@nntp0.pdx.net>
	<1140699277.658249.280130@u72g2000cwu.googlegroups.com>
	<1140700754.171942.70530@o13g2000cwo.googlegroups.com>
	<43fe3e65$1@nntp0.pdx.net>
Message-ID: <1140739486.369708.279370@u72g2000cwu.googlegroups.com>

Again, thanks a lot!
I'm optimising my polynomial module as hard as possible, because when
it used native floats/integers it was very fast, but in some specific
cases -- too inaccurate. So, I migrated to decimals, and module began
to be very slow. Current success is nearly 4x speedup, and now it seems
to me that decimals are the bottleneck. Is anybody working on C version
of decimals? Is it a really hard work? (I am thinking about
re-implementing decimals in C by myself)



From limodou at gmail.com  Tue Feb  7 23:10:29 2006
From: limodou at gmail.com (limodou)
Date: Wed, 8 Feb 2006 12:10:29 +0800
Subject: module with __call__ defined is not callable?
In-Reply-To: <2773CAC687FD5F4689F526998C7E4E5F07433F@au3010avexu1.global.avaya.com>
References: <2773CAC687FD5F4689F526998C7E4E5F07433F@au3010avexu1.global.avaya.com>
Message-ID: <505f13c0602072010tca7e145if2257ec44d36c896@mail.gmail.com>

On 2/8/06, Delaney, Timothy (Tim) <tdelaney at avaya.com> wrote:
> limodou wrote:
>
> > On 2/8/06, adam johnson <adam.sven.johnson at gmail.com> wrote:
> >> Thanks for you answer.
> >>
> >> I was under the impression that you could tack methods onto an
> >> object at any time, your example almost works with old style classes
> >> and would with a function instead of a method.
>
> In fact it will work if you change the A.hello to self.hello ...
>
>     class A:
>
>         def __init__(self):
>             self.__call__ = self.hello
>
>         def hello (self):
>             print 'Hello, world!'
>
>     a = A()
>     a()
>
>     Hello, world!
>
> >> So now all I need to know is why now with new style classes the
> >> special functions need to be defined on the class instead of
> >> attached to the instance at any time.
>
> http://users.rcn.com/python/download/Descriptor.htm
>
> > don't need do like above!
> >
> >  >>> class A:
> >  ...     def __init__(self):
> >  ...             A.__call__ = A.hello
> >  ...     def hello(self):
> >  ...             print "Hello, world!"
> >
> >  >>> a = A()
> >  >>> a()
> >  Hello, world!
> >
> > You should review the bound method and unbound method.
>
> This has nothing to do with it - in the above example, you are setting
> the *class* attribute of a user-defined class (which allows setting
> additional attributes) - which therefore makes instances callable.
>
Of course I know that.

> Compare the equivalent for the current module:
>
>     import sys
>
>     def hello (self):
>         print 'Hello, world!'
>
>     m = sys.modules[__name__]
>     mc = type(m)
>     mc.__call__ = hello
>
>     Traceback (most recent call last):
>       File "D:\Python\modules\testclasscall.py", line 7, in ?
>         mc.__call__ = hello
>     TypeError: can't set attributes of built-in/extension type 'module'
>
The exception is right, some special method cannot be replace for some
built-in type(new-style class). I just don't suggest adding __call__()
to a module, I don't know why does he need this. Because I think the
module normally works like a namespace.

--
I like python!
My Blog: http://www.donews.net/limodou
NewEdit Maillist: http://groups.google.com/group/NewEdit


From http  Mon Feb 27 01:13:47 2006
From: http (Paul Rubin)
Date: 26 Feb 2006 22:13:47 -0800
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
Message-ID: <7xmzgdtjl0.fsf@ruckus.brouhaha.com>

Ben Finney <bignose+python at benfinney.id.au> writes:
> Enumerations with no values are meaningless.  The exception
> ``EnumEmptyError`` is raised if the constructor is called with no
> value arguments.

Why are empty enumerations not allowed?  Empty sets, empty lists,
empty dictionaries are all allowed.  I don't see any obvious benefits
to not allowing empty enumerations.


From twic at urchin.earth.li  Tue Feb  7 16:08:52 2006
From: twic at urchin.earth.li (Tom Anderson)
Date: Tue, 7 Feb 2006 21:08:52 +0000
Subject: Question about idioms for clearing a list
In-Reply-To: <1139306562.105655.23200@f14g2000cwb.googlegroups.com>
References: <mailman.1294.1138727665.27775.python-list@python.org>  
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>  
	<mailman.1489.1139232969.27775.python-list@python.org>
	<ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>
	<1139306562.105655.23200@f14g2000cwb.googlegroups.com>
Message-ID: <Pine.LNX.4.62.0602072037330.4501@urchin.earth.li>

On Tue, 7 Feb 2006, Ben Sizer wrote:

> Raymond Hettinger wrote:
>> [Steven D'Aprano]
>>>> The Zen isn't "only one way to do it". If it were, we
>>>> wouldn't need iterators, list comps or for loops,
>>>> because they can all be handled with a while loop (at
>>>> various costs of efficiency, clarity or obviousness).
>>>>
>>>> del L[:] works, but unless you are Dutch, it fails the
>>>> obviousness test.
>>
>> [Fredrik Lundh]
>>> unless you read some documentation, that is.  del on sequences
>>> and mappings is a pretty fundamental part of Python.  so are slicings.
>>>
>>> both are things that you're likely to need and learn long before you 
>>> end up in situation where you need to be able to clear an aliased 
>>> sequence.

I don't agree with that at all. I'd been programming python for a while (a 
year?) before i knew about del l[:].

>> Likewise, the del keyword is fundamental -- if you can't get, set, and 
>> del, then you need to go back to collections school.
>
> I have hardly used the del keyword in several years of coding in Python.

Ditto.

> Why should it magically spring to mind in this occasion? Similarly I 
> hardly ever find myself using slices, never mind in a mutable context.
>
> del L[:] is not obvious, especially given the existence of clear() in 
> dictionaries.

Agreed.

tom

-- 
GOLDIE LOOKIN' CHAIN [...] will ultimately make all other forms of music
both redundant and unnecessary -- ntk


From duncan.booth at invalid.invalid  Sat Feb 18 11:50:54 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 18 Feb 2006 16:50:54 GMT
Subject: share function argument between subsequent calls but not between
	class instances!
References: <11vejkega5tbrc5@corp.supernews.com>
Message-ID: <Xns976EAB5E52818duncanbooth@127.0.0.1>

K. Jansma wrote:

> as you can see, the b.f method shares L with a.f.
> How can I avoid this without using eg. self.L in an __init__?
> 

You cannot.

If a method argument has a default value then the same default is used 
whenever the method is called. If you want each instance to have its own 
value then you must use an attribute on the instance.

If you intend to only use the default some of the time, and at other times 
pass in a different list, then save the 'default' in the instance and use a 
special marker value to indicate when you intend the default to be used:

marker = object()

class Test(object):
    def __init__(self):
        self.L = []

    def f(self,a, L=marker):
        if L is marker:
            L = self.L
        L.append(a)
        return L


From hancock at anansispaceworks.com  Sat Feb 11 02:55:40 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Sat, 11 Feb 2006 01:55:40 -0600
Subject: installing python on a server?
In-Reply-To: <PB6Hf.1596$No6.37972@news.tufts.edu>
References: <PB6Hf.1596$No6.37972@news.tufts.edu>
Message-ID: <20060211015540.6fa1444d@samwise.anansi>

On Fri, 10 Feb 2006 20:22:07 GMT
John Salerno <johnjsal at NOSPAMgmail.com> wrote:
> Can anyone tell me how complicated it might be to install
> Python on my  server so I can use it for web apps? Is it a
> one-time process, or  something to maintain?

Installing Python on a server is really, really easy.  At
least it is if you have root privileges and a reasonably
well-known platform to install on.

*USING* the Python installation for web applications is a
bit more complicated -- you have many choices about how to
do that.

For my money, the easy way if you are mostly wanting to make
web applications is to use Zope. It has a big up-front
learning curve, but once you get to know it, maintaining
scripts becomes trivially easy to do.

If you have other constraints on your server, or you really
just want a static site with a few dynamic elements, you
might be better served with a lighter-weight package than
Zope, and there's maybe a dozen different ones to choose
from.  Easier to learn, but probably more work in the long
run if you have to do a lot of script work on your site.

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From felipe.lessa at gmail.com  Sat Feb 25 09:17:54 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sat, 25 Feb 2006 11:17:54 -0300
Subject: Problem with Property
In-Reply-To: <dtpoo2$r41$1@sea.gmane.org>
References: <TsydnRFxOJsBw53ZnZ2dnUVZ_tqdnZ2d@comcast.com>
	<dtpoo2$r41$1@sea.gmane.org>
Message-ID: <1140877074.4068.0.camel@kenshin>

Em S?b, 2006-02-25 ?s 09:14 -0500, Steve Holden escreveu:
> It seems particularly odd to want to put getters and setters behind 
> property access. What does the extra layer buy you?

I can only think of some kind of debugging. Maybe?

> regards
>   Steve

Cya,
Felipe.

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From keith at nekotaku.com  Tue Feb 28 13:40:12 2006
From: keith at nekotaku.com (keith at nekotaku.com)
Date: Tue, 28 Feb 2006 11:40:12 -0700
Subject: MySQLdb compile error with AMD64
Message-ID: <20060228114012.805655b7c67e576280eebc9eec5e7522.522b15ac1b.wbe@email.email.secureserver.net>

Can anyone offer any assistance on this one?

Is it unsupported on AMD64 ? Nothing in the README points to that. I
thought it would default to 32bit if not supported under 64.
> 
> Hi,
> 
> I have been using MySQLdb on a 32-bit processor, no worries. Love it.
> 
> I went to install on an AMD64 running the 64-bit version of SUSE 10.0.
> 
> I get the following error during the "python setup.py build"
> 
> gcc -pthread -fno-strict-aliasing -DNDEBUG -O2 -fmessage-length=0 -Wall
> -D_FORTIFY_SOURCE=2 -g -fPIC -I/usr/include/mysql
> -I/usr/include/python2.4 -c _mysql.c -o
> build/temp.linux-x86_64-2.4/_mysql.o -I/usr/include/mysql -g
> -march=i586 -mcpu=i686 -fmessage-length=0
> `-mcpu=' is deprecated. Use `-mtune=' or '-march=' instead.
> _mysql.c:1: error: CPU you selected does not support x86-64 instruction
> set
> _mysql.c:1: error: CPU you selected does not support x86-64 instruction
> set
> error: command 'gcc' failed with exit status 1
> 
> Any ideas on what I have to do to make this work?
> 
> Any help appreciated!
> 
> Cheers
> Keith



From ian at bygrave.me.uk  Sat Feb 11 08:33:58 2006
From: ian at bygrave.me.uk (Ian Bygrave)
Date: Sat, 11 Feb 2006 13:33:58 +0000
Subject: Shortest prime number program
References: <1139652226.869102.310180@g14g2000cwa.googlegroups.com>
	<pan.2006.02.11.12.43.23.874279@bygrave.me.uk>
Message-ID: <pan.2006.02.11.13.33.58.368669@bygrave.me.uk>

On Sat, 11 Feb 2006 12:43:23 +0000, Ian Bygrave wrote:
> p,r=[],range(2,99)
> while r:p,r=p+r[:1],[x for x in r if x%r[0]]
> 
> And the result's in p.

Well, given a hypothetical new function 'sieve'

def sieve(f,l):
    if not l:
        return l
    head,tail=l[0],l[1:]
    def filter_func(x):
        return f(x,head)
    tail=filter(filter_func,tail)
    return [head]+tail

The prime generation can be reduced to:

from operator import *
sieve(mod,range(2,99))

Is there any precedent for such a function, or any other uses?
 
--Ian Bygrave



From robert.kern at gmail.com  Sun Feb  5 17:20:16 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Sun, 05 Feb 2006 16:20:16 -0600
Subject: Numeric and matlab
In-Reply-To: <43E66D81.20906@bryant.edu>
References: <43E66D81.20906@bryant.edu>
Message-ID: <ds5tmv$7eg$1@sea.gmane.org>

Brian Blais wrote:
> Hello,
> 
> Most of my experience is with Matlab/Octave, so I am a Python newbie (but enjoying 
> it! :)  )

A better place to ask would be numpy-discussion at lists.sourceforge.net . By the
way, Numeric has undergone a rewrite and is now known as numpy.

  http://numeric.scipy.org

> There are a lot of things that I do in Matlab that I'd like to know the proper way to 
> do in Python.  Here are a few:
> 
> MATLAB:
> 
> 	% example vectors
> 	a=1:10;
> 	b=-5:.1:5;

In [18]: from numpy import *

In [19]: a = arange(1,11)

In [20]: a
Out[20]: array([ 1,  2,  3,  4,  5,  6,  7,  8,  9, 10])

In [22]: b = arange(-5, 5.1, 0.1)

In [23]: b
Out[23]:
array([ -5.00000000e+00,  -4.90000000e+00,  -4.80000000e+00,
        -4.70000000e+00,  -4.60000000e+00,  -4.50000000e+00,
        -4.40000000e+00,  -4.30000000e+00,  -4.20000000e+00,
        -4.10000000e+00,  -4.00000000e+00,  -3.90000000e+00,
        -3.80000000e+00,  -3.70000000e+00,  -3.60000000e+00,
        -3.50000000e+00,  -3.40000000e+00,  -3.30000000e+00,
        -3.20000000e+00,  -3.10000000e+00,  -3.00000000e+00,
        -2.90000000e+00,  -2.80000000e+00,  -2.70000000e+00,
        -2.60000000e+00,  -2.50000000e+00,  -2.40000000e+00,
        -2.30000000e+00,  -2.20000000e+00,  -2.10000000e+00,
        -2.00000000e+00,  -1.90000000e+00,  -1.80000000e+00,
        -1.70000000e+00,  -1.60000000e+00,  -1.50000000e+00,
        -1.40000000e+00,  -1.30000000e+00,  -1.20000000e+00,
        -1.10000000e+00,  -1.00000000e+00,  -9.00000000e-01,
        -8.00000000e-01,  -7.00000000e-01,  -6.00000000e-01,
        -5.00000000e-01,  -4.00000000e-01,  -3.00000000e-01,
        -2.00000000e-01,  -1.00000000e-01,  -1.77635684e-14,
         1.00000000e-01,   2.00000000e-01,   3.00000000e-01,
         4.00000000e-01,   5.00000000e-01,   6.00000000e-01,
         7.00000000e-01,   8.00000000e-01,   9.00000000e-01,
         1.00000000e+00,   1.10000000e+00,   1.20000000e+00,
         1.30000000e+00,   1.40000000e+00,   1.50000000e+00,
         1.60000000e+00,   1.70000000e+00,   1.80000000e+00,
         1.90000000e+00,   2.00000000e+00,   2.10000000e+00,
         2.20000000e+00,   2.30000000e+00,   2.40000000e+00,
         2.50000000e+00,   2.60000000e+00,   2.70000000e+00,
         2.80000000e+00,   2.90000000e+00,   3.00000000e+00,
         3.10000000e+00,   3.20000000e+00,   3.30000000e+00,
         3.40000000e+00,   3.50000000e+00,   3.60000000e+00,
         3.70000000e+00,   3.80000000e+00,   3.90000000e+00,
         4.00000000e+00,   4.10000000e+00,   4.20000000e+00,
         4.30000000e+00,   4.40000000e+00,   4.50000000e+00,
         4.60000000e+00,   4.70000000e+00,   4.80000000e+00,
         4.90000000e+00,   5.00000000e+00])

> 	% set all the values above 5 equal to 6
> 	idx=find(a>5);
> 	a(idx)=6;

In [24]: a[a>5] = 6

In [25]: a
Out[25]: array([1, 2, 3, 4, 5, 6, 6, 6, 6, 6])

> 	% extract elements
> 
> 	idx=find(b>0)
> 	b=b(idx);

In [27]: b[b>0]
Out[27]:
array([ 0.1,  0.2,  0.3,  0.4,  0.5,  0.6,  0.7,  0.8,  0.9,  1. ,  1.1,
        1.2,  1.3,  1.4,  1.5,  1.6,  1.7,  1.8,  1.9,  2. ,  2.1,  2.2,
        2.3,  2.4,  2.5,  2.6,  2.7,  2.8,  2.9,  3. ,  3.1,  3.2,  3.3,
        3.4,  3.5,  3.6,  3.7,  3.8,  3.9,  4. ,  4.1,  4.2,  4.3,  4.4,
        4.5,  4.6,  4.7,  4.8,  4.9,  5. ])

> 	% meshgrid...usually to go through all possibly values of a parameter
> 
> 	[x,y]=meshgrid(1:10,-5:.1:5)

In [28]: x,y = mgrid[1:11, -5:5.1:0.1]

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From andre.roberge at gmail.com  Fri Feb 24 15:56:39 2006
From: andre.roberge at gmail.com (=?iso-8859-1?B?QW5kcuk=?=)
Date: 24 Feb 2006 12:56:39 -0800
Subject: execfile error exception line number?
In-Reply-To: <mailman.2365.1140721736.27775.python-list@python.org>
References: <mailman.2365.1140721736.27775.python-list@python.org>
Message-ID: <1140814599.934146.274870@v46g2000cwv.googlegroups.com>


Brian Blais wrote:
> Hello,
>
> I'd like to do the following:
>
> import sys
> try:
> 	execfile("somefile.py")
> except:
> 	s=sys.exc_info()
> 	print "Error '%s' happened on line %d" % (s[1],s[2].tb_lineno)
>
How about this:
=== input: ====
try:
    execfile("somefile.py")
except Exception, info:
    print "Error '%s' happened on line %d" % (info[0], info[1][1])
==== output: ====
Error 'invalid syntax' happened on line 3
=== somefile.py is =====
print 3
print 3
prnt 5
print 6
=============


Andr?



From jacob at cd.chalmers.se  Sat Feb 18 13:31:26 2006
From: jacob at cd.chalmers.se (Jacob Hallen)
Date: 18 Feb 2006 18:31:26 GMT
Subject: Twisted book opinions?
References: <mailman.1638.1139452774.27775.python-list@python.org>
	<dsf7qb$2rl$1@scotsman.ed.ac.uk> <43EB295B.1020404@pollenation.net>
	<mailman.1661.1139495753.27775.python-list@python.org>
Message-ID: <dt7p5u$peo$1@eol.dd.chalmers.se>

In article <mailman.1661.1139495753.27775.python-list at python.org>,
Andrew Gwozdziewycz  <apgwoz at gmail.com> wrote:
>> It's really more of an example based tutorial book than cookbook.
>> What it does do really well is 'networking programming essentials'. I
>> found it quite a good book and managed to write a distributed ssh cron
>> tool in an evening after reading the sections on SSH.
>
>I would second that. The examples are very good, and it breaks down
>the code and explains the new concepts.
>
>> What I'd really like now is a 'Web Application Development with
>> Twisted/Nevow' book that takes off where this 'network protocol'
>> oriented book leaves off.
>
>I thought the O'Reilly book was pretty decent at describing how to
>setup a web application. It's not entirely complete, but I was able to
>piece together an application with a somewhat complex web application
>on top of it. Twisted made it quite easy.

The book does Twisted basics very well. The examples are many and they are
just the right size for grasping how to do things.

My only gripe is that the way it produces HTML code in the web examples
is very primitive. You should be using Stan (a very Pythonic DOM) instead
of the explicit strings that are used throughout the book. Fortunately
there is an on-line tutorial for Stan, which is very good.

http://www.kieranholland.com/code/documentation/nevow-stan/

Jacob Hall?n

-- 


From tim.golden at viacom-outdoor.co.uk  Mon Feb 13 12:13:37 2006
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Mon, 13 Feb 2006 17:13:37 -0000
Subject: Execute batch script on remote computer
Message-ID: <9A28C052FF32734DACB0A288A3533991044D2550@vogbs009.gb.vo.local>

[py]

(re running remote processes)

| WMI will work, i can create a new Win32_Process.

OK, but remember that the process won't interact with the
desktop on the remote machine -- which may well be what you
want -- and also that the environment will likely be different,
unless you're connecting as a specific user (and even then
I'm not sure!) So make sure that your Python paths etc.
will work, and that the user the process is running under
has sufficient security to do whatever it needs.

| XML_RCP would be nice, but probably to much for what i need.

XML-RPC is quite lightweight, but requires a running server
on the remote machine. (Not a big deal, but still more than
using the already-there WMI).

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________


From singletoned at gmail.com  Fri Feb 24 05:28:49 2006
From: singletoned at gmail.com (Singletoned)
Date: 24 Feb 2006 02:28:49 -0800
Subject: ls files --> list packer
In-Reply-To: <1140769092.801279.181970@p10g2000cwp.googlegroups.com>
References: <1140765792.864556.289820@i40g2000cwc.googlegroups.com>
	<1140767111.490691.42460@e56g2000cwe.googlegroups.com>
	<1140768527.006363.29050@i39g2000cwa.googlegroups.com>
	<1140769092.801279.181970@p10g2000cwp.googlegroups.com>
Message-ID: <1140776929.763024.261320@z34g2000cwc.googlegroups.com>

Try using The Path module:
http://www.jorendorff.com/articles/python/path/.

I wrote a little script to traverse a directory structure which you
could use.  (You just pass a function to it and it runs it on each file
in the directory.  You want it to run on each directory instead, so
I've changed it a little for you).

import path

def traverse(directory, function, depth=0, onfiles=True, ondirs=False):
       thedir = path.path(directory)
       if onfiles == True:
              for item in thedir.files():
                      function(item, depth)
       if ondirs == True:
              for item in thedir.dirs():
                     function(item, depth)
       for item in thedir.dirs():
               traverse(item, function, depth+1, onfiles, ondirs)

You can use it like so:

def printaifs(thedir, depth):
       print thedir.name
       for item in thedir.files("*.aif'"):
              print "\t" + item

traverse(r"/Users/foo/snd", printaifs, onfiles=False, ondirs=True)

NB: I've quickly adapted this whilst away from an installation of
Python, so it is untested, but should mostly work, unless there's a
typo.

Hope this helps at least a little...

Ed

PS The Python Tutor list tends to be a much better place to discuss
this kind of stuff.  If you haven't yet encountered Kent and Alan's
help, then you have a joyous experience ahead of you.



From infini.g at gmail.com  Wed Feb  1 21:01:15 2006
From: infini.g at gmail.com (GazaM)
Date: 1 Feb 2006 18:01:15 -0800
Subject: cgi - secure sessions
In-Reply-To: <7xzmlabk8s.fsf@ruckus.brouhaha.com>
References: <1138842390.012855.107610@g44g2000cwa.googlegroups.com>
	<7x8xsuczxz.fsf@ruckus.brouhaha.com>
	<1138844380.094365.223840@g44g2000cwa.googlegroups.com>
	<7xzmlabk8s.fsf@ruckus.brouhaha.com>
Message-ID: <1138845674.984726.219010@g49g2000cwa.googlegroups.com>

Kirk: I'm using the Cookie module to create/send/read the cookies. The
problem is that I can't read session cookies when running the script
from a server side include line.

Paul: By server side include I mean simply calling upon the script from
an include line within the html, for example '<!--#include
virtual="/cgi-bin/cookietest.cgi" -->'

GazaM



From lormayna at gmail.com  Sat Feb 11 06:03:28 2006
From: lormayna at gmail.com (Zarathustra)
Date: 11 Feb 2006 03:03:28 -0800
Subject: Pyserial handobook
Message-ID: <1139655808.197478.64160@g43g2000cwa.googlegroups.com>

Hi, where I can find the pyserial handbook??
THanks



From Pavol.Severa at gmail.com  Wed Feb 15 08:00:27 2006
From: Pavol.Severa at gmail.com (palo)
Date: 15 Feb 2006 05:00:27 -0800
Subject: choose and open a folder in Windows
In-Reply-To: <mailman.1943.1140003359.27775.python-list@python.org>
References: <mailman.1943.1140003359.27775.python-list@python.org>
Message-ID: <1140008426.955813.172600@f14g2000cwb.googlegroups.com>

thanks a lot, it works
and sorry for intelligent questions:)



From nicola.musatti at gmail.com  Mon Feb  6 05:28:46 2006
From: nicola.musatti at gmail.com (Nicola Musatti)
Date: 6 Feb 2006 02:28:46 -0800
Subject: OO conventions
In-Reply-To: <1138993768.634863.166250@f14g2000cwb.googlegroups.com>
References: <mailman.1334.1138833641.27775.python-list@python.org>
	<pan.2006.02.02.11.08.33.964@REMOVETHIScyber.com.au>
	<1138971920.353603.38040@f14g2000cwb.googlegroups.com>
	<1138993768.634863.166250@f14g2000cwb.googlegroups.com>
Message-ID: <1139221726.376326.73560@g44g2000cwa.googlegroups.com>


I V wrote:
> Nicola Musatti wrote:
[...]
> > Factory functions (or classes) are there to solve this problem and
> > still allow a clean separation of concerns. Although instances of Klass
> > are created uninitialized, they only live in this state within their
> > factory and only reach trhe outside world only when they are in a
> > usable state.
>
> This may be my limited imagination, but I can't think of a situation
> when you would prefer something like:
>
> def factory(info):
>     k = Klass()
>     data = get_initial_data(info)
>     k.set_data(data)
>     return k
>
> to:
>
> def factory(info):
>     data = get_initial_data(info)
>     return Klass(data)
>
> What would be the value of doing the initialization in a separate
> method, rather than the constructor?

I didn't express my intent clearly. I agree that in general your second
example is to be preferred to the first one. In fact the only reason I
could think of using the first scheme is when the second would lead to
Klass's __init__ method having a large number of parameters.

What is important to me is to keep your get_initial_data() function
outside Klass if it's task is non trivial, e.g. it has to interact with
the OS or a DB.

Cheers,
Nicola Musatti



From peter.mosley at talk21.com  Thu Feb 16 18:07:18 2006
From: peter.mosley at talk21.com (peter.mosley at talk21.com)
Date: 16 Feb 2006 15:07:18 -0800
Subject: Unable to get PIL to load jpeg images
References: <1139263113.552140.114100@o13g2000cwo.googlegroups.com>
	<1139315319.654694.285330@g43g2000cwa.googlegroups.com>
	<mailman.1545.1139316436.27775.python-list@python.org>
	<1139475569.693965.249700@o13g2000cwo.googlegroups.com>
	<1140042505.720124.165250@f14g2000cwb.googlegroups.com>
Message-ID: <1140131238.457601.33920@g43g2000cwa.googlegroups.com>

> Can you share the name of the library on the Fedora distro?


file:///media/cdrecorder/Fedora/RPMS/libjpeg-devel-6b-33.i386.rpm

On disc 3 in my copy, but that probably doesn't mean anything!

Peter



From oliphant.travis at ieee.org  Thu Feb 16 19:18:19 2006
From: oliphant.travis at ieee.org (Travis E. Oliphant)
Date: Thu, 16 Feb 2006 17:18:19 -0700
Subject: ANN: Release of NumPy 0.9.5
Message-ID: <dt34od$7d2$1@sea.gmane.org>

NumPy is the successor to both Numeric and Numarray.  It builds from and 
uses code from both.

More information can be found at the following links

http://numeric.scipy.org
http://www.scipy.org
http://sourceforge.net/project/showfiles.php?group_id=1369&package_id=175103

Highlights of Release:

  -  Unicode arrays are now always UCS4 even on narrow Python builds
  -  Many improvements and bugfixes to dtype objects
  -  Improvements to numpy.distutils
  -  Optimized dot function improved so copies are no longer made for 
    transposed arrays

  -  Many more bug-fixes

Full release notes at

http://sourceforge.net/project/shownotes.php?release_id=394206&group_id=1369


Best regards,


-Travis Oliphant




From mensanator at aol.com  Thu Feb  9 13:23:12 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 9 Feb 2006 10:23:12 -0800
Subject: Pulling all n-sized combinations from a list
In-Reply-To: <mailman.1668.1139501162.27775.python-list@python.org>
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>
	<mailman.1668.1139501162.27775.python-list@python.org>
Message-ID: <1139509392.890581.94470@g43g2000cwa.googlegroups.com>


Jack Diederich wrote:
> On Wed, Feb 08, 2006 at 12:50:19PM -0800, Swroteb wrote:
> > Hi there,
> >
> > I've got a reasonably sized list of objects that I'd like to pull out
> > all combinations of five elements from.  Right now I have a way to do
> > this that's quite slow, but manageable.  I know there must be a better
> > way to do this, but I'm not sure what it is.  Here's what I've got so
> > far:
> >
>
> import probstat # http://probstat.sourceforge.net
> for (a, b, c) in probstat.Combination(range(9), 3): # 0..9, pick 3
>   print a, b, c
>
> It is a C extension that does permutations & combinations and is
> about 10x faster than doing it in pure python [I'm the author].
> It is also the 3rd result for "python combination" and 5th for
> "python permutaiton" but every month someone posts to c.l.py asking
> for something similar.  Go figure.

Did you ever figure that some people use Windows?

> 
> -jackdied



From samrobertsmith at gmail.com  Fri Feb 10 07:15:31 2006
From: samrobertsmith at gmail.com (linda.s)
Date: Fri, 10 Feb 2006 04:15:31 -0800
Subject: Scientific Computing with NumPy
In-Reply-To: <ds7ch4$bj7$1@gemini.csx.cam.ac.uk>
References: <ds7bvh$ab1$2@gemini.csx.cam.ac.uk>
	<mailman.1482.1139225595.27775.python-list@python.org>
	<ds7ch4$bj7$1@gemini.csx.cam.ac.uk>
Message-ID: <1d987df30602100415o16ad3d02n71aca12686667ff@mail.gmail.com>

where to download numpy for Python 2.3 in Mac?
Thanks!
Linda


From steve at holdenweb.com  Sat Feb 18 13:35:22 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 18 Feb 2006 13:35:22 -0500
Subject: commenting out blocks of code
In-Reply-To: <pan.2006.02.18.01.36.05.856023@REMOVETHIScyber.com.au>
References: <20060217231846.87613.qmail@web36708.mail.mud.yahoo.com>	<mailman.2077.1140221554.27775.python-list@python.org>
	<pan.2006.02.18.01.36.05.856023@REMOVETHIScyber.com.au>
Message-ID: <dt7pd4$v1l$1@sea.gmane.org>

Steven D'Aprano wrote:
> On Fri, 17 Feb 2006 19:12:01 -0500, Peter Hansen wrote:
> 
> 
>>john peter wrote:
>>
>>>is there a similar mechanism in python, other than prefixing
>>>the '#' character to the start of each statement i do  not
>>>want to execute (which gets old very quickly if one needs to
>>>comment and uncomment several statements a couple of
>>>times while "playing around with code" say during initial design)?
>>
>>In addition to the approach Paul has suggested, you should also consider 
>>using a better editor, as most decent editors should have some kind of 
>>"block comment/uncomment" feature that prevents that operation from 
>>getting old very quickly...
>>
>>Scite, for example, lets me selected a block and hit Ctrl-Q to either 
>>comment or uncomment the block.
> 
> 
> I see the developers of Scite are either newbies to GUI programming, or
> they operate in a world of their own. Ctrl-Q is reserved for Quit (or
> Exit) in every GUI API I know of.
> 
I don't think this is common enough to regard as any kind of de facto 
standard.

Just to give two further counterexamples, neither TextPad nor Notepad 
action a Ctrl/Q in that way. Perhaps I'm just using the wrong operating 
system?
> 
> 
>>(It does this by prefixing each line 
>>with #~ instead of just #, which allows it to detect when a line is 
>>already so commented and reverse the operation.)  
> 
> 
> It is *easy* to detect when a line is already commented. It starts with a
> #. The ~ is superfluous.
> 
> Commenting and uncommenting should be two different commands: the whole
> point of nested comments is that it allows you to comment a block of text
> which may already contain comments. Having one command do both commenting
> and uncommenting according to the presence or absence of semantic clues in
> the text is a recipe for failure ("No you stupid computer, I want to
> COMMENT that block, not uncomment it!!!").
> 
> Imagine if your text editor used cntl-C for both copy and paste, somehow
> guessing whether you wanted to copy selected text or paste over it
> according to some subtle clue in the text itself. Wouldn't that be fun?
> 
I agree that's a less-than-sensible feature implementation.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From carsten at uniqsys.com  Mon Feb 13 13:54:20 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 13 Feb 2006 13:54:20 -0500
Subject: cx_Oracle string problems...
In-Reply-To: <1139856611.11014.32.camel@dot.uniqsys.com>
References: <1139850767.853237.122710@f14g2000cwb.googlegroups.com>
	<1139852585.938381.247590@f14g2000cwb.googlegroups.com>
	<1139854719.427035.19820@g47g2000cwa.googlegroups.com>
	<1139856611.11014.32.camel@dot.uniqsys.com>
Message-ID: <1139856860.11014.36.camel@dot.uniqsys.com>

On Mon, 2006-02-13 at 13:50, Carsten Haese wrote:
> By using parametrized queries, you don't have to worry about any of the
> supplied values requiring special treatment due to any quotation marks
> or apostrophes that might they might contain.

Add grammar corrections to taste.

-Carsten




From fccoelho at gmail.com  Thu Feb  2 16:39:25 2006
From: fccoelho at gmail.com (Flavio)
Date: 2 Feb 2006 13:39:25 -0800
Subject: PyQt: QListView how to retrieve selected items?
In-Reply-To: <44f50sF1u9c3U1@uni-berlin.de>
References: <1138907537.417067.228570@z14g2000cwz.googlegroups.com>
	<44f50sF1u9c3U1@uni-berlin.de>
Message-ID: <1138916365.766264.152280@z14g2000cwz.googlegroups.com>

Iterating over the items and checking if it is selected, sounds like a
good idea, but there no obvious way to get a hold of the list of
items!! The only way you  can get an item is if you are in single
selection mode and you call selectedItem(). But I have to use multiple
selection mode, for which this method does not work (it says so in the
docs)

The signal selectionChanged() is emitted whenever the set of selected
items has changed but does not return any information regarding the
items comprising the set. Also useless.

> And all of this can be found within 20 seconds in the great Qt-Docs.
> Especially easy with the included QAssistant, a help-browser with
> indexing and whatever...

The docs are really great, it's this particular widget that appear to
lacking some important functionality! This is very sad.



From felipe.lessa at gmail.com  Tue Feb 28 15:37:15 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Tue, 28 Feb 2006 17:37:15 -0300
Subject: comple list slices
In-Reply-To: <1141146626.762530.282660@v46g2000cwv.googlegroups.com>
References: <mailman.2516.1141136527.27775.python-list@python.org>
	<1141143200.110570.51680@u72g2000cwu.googlegroups.com>
	<mailman.2519.1141145363.27775.python-list@python.org>
	<1141146626.762530.282660@v46g2000cwv.googlegroups.com>
Message-ID: <1141159035.10021.7.camel@kenshin>

Em Ter, 2006-02-28 ?s 09:10 -0800, johnzenger at gmail.com escreveu:
> Although I don't know if this is faster or more efficient than your
> current solution, it does look cooler:
[snip]
> print [x for x in grouper]

This is not cool. Do

print list(grouper)

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From lycka at carmen.se  Mon Feb 27 11:07:13 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Mon, 27 Feb 2006 17:07:13 +0100
Subject: Firebird and Python
In-Reply-To: <dtno33$qbk$1@nemesis.news.tpi.pl>
References: <1140716394.225560.27920@t39g2000cwt.googlegroups.com>	<mailman.2364.1140721473.27775.python-list@python.org>	<1140727082.800917.44550@i40g2000cwc.googlegroups.com>	<dtmk8t$an9$1@wake.carmen.se>
	<mailman.2392.1140782962.27775.python-list@python.org>
	<dtni65$dnv$1@wake.carmen.se> <dtno33$qbk$1@nemesis.news.tpi.pl>
Message-ID: <dtv83h$t52$1@wake.carmen.se>

Jarek Zgoda wrote:

> They just hired Jim Starkey. Perhaps MySQL AB hopes he will write a
> transactional engine for MySQL, as he previously wrote one for Interbase
> (which is known to be one of the best a man could imagine).
> 
> Anyway, we got far off topic, so we better go somewhere else.

Ok, to bring us a bit back on track again, I'm
curious about Firbird, since we want an embedded
SQL engine for some automated testing tasks, and
SQLite is a bit too lite for our needs.

We use our own DB API, so we won't really need any
Python DB-API adapter, but I'm still interested
in experiences from Pythonistas using Firebird--
especially embedded.


From fuzzyman at gmail.com  Sun Feb 19 12:37:08 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 19 Feb 2006 09:37:08 -0800
Subject: [ANN] ConfigObj 4.2.0
Message-ID: <1140370628.865341.161590@g43g2000cwa.googlegroups.com>

`ConfigObj 4.2.0 <http://www.voidspace.org.uk/python/configobj.html>`_
is now available.

The main improvements are *full* Unicode support,a s well as the
addition of the 'convenience' `Section Methods
<http://www.voidspace.org.uk/python/configobj.html#section-methods>`_

* *as_bool*
* *as_int*
* *as_float*

More compelling reasons to choose **ConfigObj** for reading and writing
config files in Python. :-)

What's New ?
==========

The full changelog is :

Removed ``BOM_UTF8`` from ``__all__``.

The ``BOM`` attribute has become a boolean. (Defaults to ``False``.) It
is *only* ``True`` for the ``UTF16`` and UTF8 encodings.

File like objects no longer need a ``seek`` attribute.

Full unicode support added. New options/attributes ``encoding``,
``default_encoding``.

ConfigObj no longer keeps a reference to file like objects. Instead the
``write`` method takes a file like object as an optional argument.
(Which will be used in preference of the ``filename`` attribute if that
exists as well.)

utf16 files decoded to unicode.

If ``BOM`` is ``True``, but no encoding specified, then the utf8 BOM is
written out at the start of the file. (It will normally only be
``True`` if the utf8 BOM was found when the file was read.)

File paths are *not* converted to absolute paths, relative paths will
remain relative as the ``filename`` attribute.

Fixed bug where ``final_comment`` wasn't returned if ``write`` is
returning a list of lines.

Deprecated ``istrue``, replaced it with ``as_bool``.

Added ``as_int`` and ``as_float``.

What is ConfigObj ?
===============

**ConfigObj** is a simple but powerful config file reader and writer:
an *ini file round tripper*.

It's main feature is that it is very easy to use, with a
straightforward programmer's interface and a simple syntax for config
files. It has lots of other features though. It is intended as a more
powerful (but simpler to use) replacement for `ConfigParser
<http://docs.python.org/lib/module-ConfigParser.html>`_.

It's features include :

* Nested sections (subsections), to any level
* List Values
* Multiple Line Values
* Full Unicode support
* String interpolation (substitution)
* Integrated with a powerful validation system

    - including automatic type checking/conversion
    - repeated sections
    - and allowing default values

* All comments in the file are preserved
* The order of keys/sections is preserved
* No external dependencies



From webraviteja at gmail.com  Fri Feb 17 21:41:00 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 17 Feb 2006 18:41:00 -0800
Subject: Komodo - Will it Lock Me In?
In-Reply-To: <mailman.2081.1140228879.27775.python-list@python.org>
References: <yEncExpress_Rulz!_www.techsono.com_3223072898@firstva.com>
	<mailman.2081.1140228879.27775.python-list@python.org>
Message-ID: <1140230460.339511.33630@g47g2000cwa.googlegroups.com>

> Not sure about the "install-packages-until-you-go-blind" thing. Komodo
> doesn't help you install packages into your Python implementation. Nor

I think he is confusing with Visual Package Manager.
Matt, in most cases, installing packages in Python is about as easy as
it gets. As a newbie, you should stick to binary packages at first. And
installing is simple as clicking through an installer or typing "python
setup.py install" in most cases.



From fredrik at pythonware.com  Fri Feb 17 06:20:51 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 17 Feb 2006 12:20:51 +0100
Subject: Add a month
References: <1140173540.686250.205760@g44g2000cwa.googlegroups.com>
Message-ID: <dt4bil$n2r$1@sea.gmane.org>

novin01 at gmail.comn wrote:

> Hi, this is probably a really simple question but...
> How do you add a month to a datetime date in python? It would be nice
> if  you could do something like:
>
> d = datetime.date(2006,2,17)
> dm = datetime.timedelta(months=1)
> d_new = d + dm
>
> but timedelta doesn't have a 'months' setting. Am I missing some easy
> method or do I have to code a work around myself??

what do you expect d_new to be after the operation ?  if the answer
is date(2006,3,17), what's date(2006,1,31) plus one month?

</F>





From peter.maas at somewhere.com  Fri Feb 10 14:02:11 2006
From: peter.maas at somewhere.com (Peter Maas)
Date: Fri, 10 Feb 2006 20:02:11 +0100
Subject: html entity to unicode
In-Reply-To: <1139588851.594418.301860@g14g2000cwa.googlegroups.com>
References: <1139588851.594418.301860@g14g2000cwa.googlegroups.com>
Message-ID: <dsinvm$70h$1@online.de>

zunbeltz at gmail.com schrieb:
> Hi,
> 
> I'm parsing html. I have a page with a lot of html enitties for hebrew
> characters. When i print what i get are blanks, dots and commas. How
> can i decode this entities to unicode charachters?

Python doc

13.4 htmlentitydefs -- Definitions of HTML general entities

[...]

name2codepoint
A dictionary that maps HTML entity names to the Unicode codepoints. New in version 2.3.

codepoint2name
A dictionary that maps Unicode codepoints to HTML entity names. New in version 2.3.

Peter Maas Aachen


From darthbob88 at gmail.com  Thu Feb 23 15:05:59 2006
From: darthbob88 at gmail.com (darthbob88 at gmail.com)
Date: 23 Feb 2006 12:05:59 -0800
Subject: "Temporary" Variable
In-Reply-To: <43FD6645.3020201@REMOVEMEcyber.com.au>
References: <1140665472.203495.7570@g44g2000cwa.googlegroups.com>
	<43FD6645.3020201@REMOVEMEcyber.com.au>
Message-ID: <1140725159.143882.202630@j33g2000cwa.googlegroups.com>


Steven D'Aprano wrote:
> darthbob88 at gmail.com wrote:
>
> > Problem: I wish to run an infinite loop and initialize a variable on
> > each iteration. Sort of like, "Enter Data", test it, "No good!", "Next
> > Try?", test it, etc. What I've tried is simply while 1: var1 =
> > raw_input, test var1, then run through the loop again. What results is
> > var1 gets and keeps the first value it receives.
>
> Hmmm. I get a syntax error.
>
>  >>> while 1:
> ...     var1 = raw_input
> ...     test var1
>    File "<stdin>", line 3
>      test var1
>              ^
> SyntaxError: invalid syntax
>
> How about posting your actual code?
Soitenly.
#!/usr/bin/python
#simple guessing game, with numbers
import random
spam = random.randint(1, 100)
print spam #debugging purposes
while 1:
	guess = raw_input("What's your guess, friend? ")
	if guess == spam:
		print "You got it! Nicely done."
		break
	elif guess < spam:
		print "Sorry, too low. Try again."
	elif guess > spam:
		print "Sorry, too high. Try again."
	else:
		print "You guessed ", guess
> You could try this:
>
> while 1:
>      var = raw_input("Give me some data! ")
>      if var == "some data":
>          print "Success!"
>          break
>      else:
>          print "No good, try again."
That works fine with strings and when "some_data" is hardcoded. I run
into trouble when "some data" is replaced with a number, unquoted. It
simply says "No good, etc"
> -- 
> Steven.



From robert.kern at gmail.com  Tue Feb 28 14:05:30 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 28 Feb 2006 13:05:30 -0600
Subject: Numerical solver
In-Reply-To: <44049538.6040109@designaproduct.biz>
References: <44049538.6040109@designaproduct.biz>
Message-ID: <du26tq$p19$1@sea.gmane.org>

Laszlo Zsolt Nagy wrote:
>   Hello,
> 
> I would like to use a numerical solver for a specific problem. My 
> problem looks like this:
> 
>    1. I have numeric constants, named A,B,C etc.
>    2. I have numeric variables, named x,y,z etc.
>    3. I have functions, like f1(x), f2(x), f3(x,y), f4(y) etc.
>    4. I have constraints like f1(x) < A  f3(x,y) < B etc.
> 
> Fortunately, all of the variables can be limited to a closed finite 
> interval. (E.g.   0 <= x <= 100)
> There is a specific function, called P(x,y,z) that needs to be optimized 
> (need to find its maximum/minimum).

In [7]: scipy.optimize.fmin_cobyla?

Type:           function
Base Class:     <type 'function'>
String Form:    <function fmin_cobyla at 0x4fff3b0>
Namespace:      Interactive
File:
/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/scipy-
0.4.7.1607-py2.4-macosx-10.4-ppc.egg/scipy/optimize/cobyla.py
Definition:     scipy.optimize.fmin_cobyla(func, x0, cons, args=(),
consargs=None, rhobeg=1.0, rhoen
d=0.0001, iprint=1, maxfun=1000)
Docstring:
    Minimize a function using the Contrained Optimization BY Linear
    Approximation (COBYLA) method

    Arguments:

    func     -- function to minimize. Called as func(x, *args)

    x0       -- initial guess to minimum

    cons     -- a sequence of functions that all must be >=0 (a single function
                if only 1 constraint)

    args     -- extra arguments to pass to function

    consargs -- extra arguments to pass to constraints (default of None means
                use same extra arguments as those passed to func).
                Use () for no extra arguments.

    rhobeg --  reasonable initial changes to the variables

    rhoend --  final accuracy in the optimization (not precisely guaranteed)

    iprint  -- controls the frequency of output: 0 (no output),1,2,3

    maxfun  -- maximum number of function evaluations.


    Returns:

    x -- the minimum

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From ivanf1 at comcast.net  Fri Feb  3 23:12:42 2006
From: ivanf1 at comcast.net (nitro)
Date: 3 Feb 2006 20:12:42 -0800
Subject: cannot install scipy
In-Reply-To: <1139026148.647811.58940@g43g2000cwa.googlegroups.com>
References: <1139013871.122256.202130@g43g2000cwa.googlegroups.com>
	<UsVEf.7441$MF1.4622@fe08.lga>
	<1139025799.128481.297310@g47g2000cwa.googlegroups.com>
	<1139026148.647811.58940@g43g2000cwa.googlegroups.com>
Message-ID: <1139026362.856573.214730@z14g2000cwz.googlegroups.com>

I should add the following informtion that it also printed out:

===
Ran 972 tests in 2.471s

FAILED (failures=1)


<unittest.TextTestRunner object at 0x40fc4dcc>
===



From tjreedy at udel.edu  Sat Feb 18 01:36:26 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 18 Feb 2006 01:36:26 -0500
Subject: Scientific Computing with NumPy
References: <ds7bvh$ab1$2@gemini.csx.cam.ac.uk><mailman.1482.1139225595.27775.python-list@python.org><ds7ch4$bj7$1@gemini.csx.cam.ac.uk><mailman.1704.1139573734.27775.python-list@python.org>
	<1140224495.798167.248550@z14g2000cwz.googlegroups.com>
Message-ID: <dt6f96$h23$1@sea.gmane.org>


"kpp9c" <kp8 at mac.com> wrote in message 
news:1140224495.798167.248550 at z14g2000cwz.googlegroups.com...
> Numeric, Numarray, & Numpy... some one stick a screwdriver in my
> forehead and end the madness that Numeric has become.

> For crying all night! Numpy was Numeric's nickname

Given that NumPy *is* an updated version of Numeric, with the same basic 
interface, I think the name quite appropriate.  It also works well as a 
partner for SciPy.

> with 2.3 seconds i came up with this:
> Nappy
> Numeric Array processing in Python

Nice 8-().  British nanny slang for diaper (napkin).

tjr





From exarkun at divmod.com  Thu Feb  2 15:48:41 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 2 Feb 2006 15:48:41 -0500
Subject: classmethod and instance method
In-Reply-To: <1138910923.048674.264840@g49g2000cwa.googlegroups.com>
Message-ID: <20060202204841.2697.1743566571.divmod.quotient.4911@ohm>

On 2 Feb 2006 12:08:43 -0800, andychambers2002 at yahoo.co.uk wrote:
>Hi,
>
>I'm trying to write a method that needs to know both the class name and
>the  instance details
>
>class A:
>
>    @classmethod
>    def meth(cls, self):
>        print cls
>        print self
>
>a = A()
>a.meth(a)
>
>The above code seems to work as intended.  Could the same effect be
>achieved using a second decorator in addition to the @classmethod.  I
>tried
>
>    def instancemethod(self):
>        return self.meth(self)
>
>    @instancemethod
>    @classmethod
>    def meth(cls, self):
>        #do stuff
>
>but it didn't work.  Any suggestions?

Hint: decorators usually return functions.  What does your decorator return?

Jean-Paul


From python-url at phaseit.net  Mon Feb  6 11:56:49 2006
From: python-url at phaseit.net (Magnus Lycka)
Date: Mon, 06 Feb 2006 16:56:49 +0000
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Feb  6)
Message-ID: <mailman.1521.1139260496.27775.python-announce-list@python.org>

QOTW:  "Excessive cleverness can lead to unmaintainable code.  So can
excessive stupidity." -- Alan Morgan

"Also Python code is pretty bare-metal, so that file.write or
socket.write go to the syscall immediately. Try that in Java and you'll
find 30 layers of complex abstractions for doubtful benefits and obvious
slowness." --  Giovanni Bajo


    Want to talk at the Python 14 Conference? Proposals are due Feb. 13th.
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/4778f0e488118d6c
    
    Need fuzzy lookups? It turns out the standard library has what you need!
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/43f3ef0bf88f40d2
    
    Metaclasses don't have to be so difficult...
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/4be7f1d3f1b3f7df

    ActiveState goes solo.  Again.
        http://blogs.activestate.com/activestate/2006/01/activestate_to_.html

    "Nokia ... announced [an agreement] to release the source code for its
    Python for S60 Platform software package ..." by way of SourceForge.
        http://www.ameinfo.com/76819.html             

    If you want a computer with fewer keys than a mobile phone, you can now
    hack away in you favourite programming language on your Apple iPod!
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/cddcdfb99c612213
    
    Yet another program is saved from unwarranted use of regular expressions!
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/32129018480c0121
    
    Yes, it's feasable to write Python DJing software. Hopefully, the OP
    realized that the answer was yes before the thread turned into
    pseudopilosophical drivel.
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/fb73a7701faf10ea
    
    This Object-Oriented stuff takes time to grasp...
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/7e34915a76fa8893
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/869e448765ea4b98
    
    Why make a code generator when you have Python?
        http://groups.google.com/group/comp.lang.python/browse_frm/thread/dfd984102f5f29ed
    

========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Steve Bethard, Tim Lesher, and Tony Meyer continue the marvelous
    tradition early borne by Andrew Kuchling, Michael Hudson and Brett
    Cannon of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and
sponsor the "Python-URL!" project.


From tim.hochberg at ieee.org  Mon Feb  6 14:26:46 2006
From: tim.hochberg at ieee.org (Tim Hochberg)
Date: Mon, 06 Feb 2006 12:26:46 -0700
Subject: Replace a module variable with a function call
In-Reply-To: <1139252075.497468.137100@g44g2000cwa.googlegroups.com>
References: <1139252075.497468.137100@g44g2000cwa.googlegroups.com>
Message-ID: <ds87tp$qug$1@sea.gmane.org>

gabriel.becedillas at gmail.com wrote:
> I have a module that defines a variable with a constant value and now I
> need to make that value dynamic, without affecting module clients. In
> other words, I need to call a function witout using parenthesis.
> Example:
> 
> mymod.py----------------------
> 
> def value():
>     return "hi"
> 
> client.py--------------------------
> import mymod
> 
> print mymod.value
> 
> Is there a way to do this ?


It can be done, but you're not really supposed to be doing this, so it's 
moderately horrible to do so. If you can manage, I'd avoid doing this, 
but if you have to, the strategy is to (1) move the contents of your 
module into a class, (2) use properties to convert what is now a method 
call into an attribute access and (3) replace the module in sys.modules 
with an instance of this class. This occasionally get you into trouble, 
for instance reload no longer works, but it has mostly worked in my 
limited experience.

Since I'm sure that's pretty opaque, here's an example:

# file noparens.py
import sys

class Module(object):

     def get_value(self):
         return "hi"
     value = property(get_value)

sys.modules[__name__] = Module()

# interpreter session
 >>> import noparens
 >>> noparens.value
'hi'

regards,

-tim



From robert.kern at gmail.com  Wed Feb 22 20:22:00 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 22 Feb 2006 19:22:00 -0600
Subject: May i customize basic operator (such as 1==3)?
In-Reply-To: <BAY108-F380AA5CEEE3584EED2B778CDF20@phx.gbl>
References: <43fc4174_2@newspeer2.tds.net>
	<BAY108-F380AA5CEEE3584EED2B778CDF20@phx.gbl>
Message-ID: <dtj2np$f3k$1@sea.gmane.org>

kanchy kang wrote:
> Is there any improvement version for standard unittest module?
> for example, output log information as files.

Several! Some build on the framework of unittest.py: nose, OOBTest,
testosterone. Some don't: py.test, Sancho.

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From grante at visi.com  Tue Feb 28 18:11:08 2006
From: grante at visi.com (Grant Edwards)
Date: Tue, 28 Feb 2006 23:11:08 -0000
Subject: Rounding up to the nearest exact logarithmic decade
References: <1141165716.023456.318240@u72g2000cwu.googlegroups.com>
	<mailman.2541.1141167416.27775.python-list@python.org>
Message-ID: <1209m4cq7vur2a2@corp.supernews.com>

On 2006-02-28, jao at geophile.com <jao at geophile.com> wrote:
> Quoting Derek Basch <dbasch at yahoo.com>:
>
>> Given a value (x) that is within the range (1e-1, 1e7) how do I round
>> (x) up to the closest exact logarithmic decade? For instance:
>
> How about this:
>
> def roundup(x):
>     if x < 1:
>         return 1
>     else:
>         return '1' + ('0' * len(str(int(x))))

Interesting approach.  You're converting to string at the same
time.  I would guess the OP wanted a float.

-- 
Grant Edwards                   grante             Yow!  It's OKAY -- I'm an
                                  at               INTELLECTUAL, too.
                               visi.com            


From mhellwig at xs4all.nl  Tue Feb 14 03:04:13 2006
From: mhellwig at xs4all.nl (Martin P. Hellwig)
Date: Tue, 14 Feb 2006 09:04:13 +0100
Subject: how do you pronounce 'tuple'?
In-Reply-To: <roy-E3EB19.22040713022006@reader2.panix.com>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
	<mailman.1857.1139863723.27775.python-list@python.org>
	<Wj6If.1606$No6.38150@news.tufts.edu> <dsqtq7$mju$1@online.de>
	<ieGdnfpVlNsJ3WzenZ2dnUVZ_t2dnZ2d@speakeasy.net>
	<roy-E3EB19.22040713022006@reader2.panix.com>
Message-ID: <43f18eff$0$11065$e4fe514c@news.xs4all.nl>

Roy Smith wrote:
> Erik Max Francis <max at alcyone.com> wrote:
>> (A 2-tuple is an "ordered pair" in mathematics.)  If a 2-tuple is a 
>> pair, then it would seem to follow that a 1-tuple is a single.
> 
> Yeah, but an *ordered* single :-)
> 
> A more interesting question is what do you call ()?  A none-tuple?
empty?

-- 
mph


From w.damen at gmail.com  Sat Feb 11 15:27:26 2006
From: w.damen at gmail.com (Rinzwind)
Date: 11 Feb 2006 12:27:26 -0800
Subject: simple math question
In-Reply-To: <RuWdnVmaD4Q23XPeRVn-tw@rcn.net>
References: <RuWdnVmaD4Q23XPeRVn-tw@rcn.net>
Message-ID: <1139689646.268366.264060@z14g2000cwz.googlegroups.com>

'/' is a floor division (1/2 == 0) unless validated by a from
__future__ import division.

So:
5/2=2.5 -> nearest lowest non-decimal number makes it 2.
5/-2=-2.5 -> nearest lowest non-decilmal number makes it -3



From rupole at hotmail.com  Thu Feb 16 21:05:43 2006
From: rupole at hotmail.com (Roger Upole)
Date: Thu, 16 Feb 2006 21:05:43 -0500
Subject: Seaching Active Directory via ADO
References: <g_7Jf.33401$0H1.22606@trnddc04>
	<1140138661.484502.86380@f14g2000cwb.googlegroups.com>
	<56aJf.78250$_D1.4370@trnddc03>
	<1140142239_1425@sp6iad.superfeed.net>
	<UtaJf.78260$_D1.52493@trnddc03>
	<1140144965_1489@sp6iad.superfeed.net>
	<w_aJf.18163$7C3.755@trnddc08>
Message-ID: <1140145594_1685@sp6iad.superfeed.net>

It usually means the domain you specified can't be found.

           Roger

"LittlePython" <LittlePython at lost.com> wrote in message
news:w_aJf.18163$7C3.755 at trnddc08...
> Do you know what this may mean?
>
> C:\Documents and Settings\Administrator\Desktop\pytest>ADOSeach.py
> Traceback (most recent call last):
>   File "C:\Documents and
Settings\Administrator\Desktop\pytest\ADOSeach.py",
> lin
> e 6, in ?
>     rs,rc=c.Execute("""
>   File "<COMObject ADODB.Connection>", line 3, in Execute
>   File "C:\Python24\Lib\site-packages\win32com\client\dynamic.py", line
258,
> in
> _ApplyTypes_
>     result = self._oleobj_.InvokeTypes(*(dispid, LCID, wFlags, retType,
> argTypes
> ) + args)
> pywintypes.com_error: (-2147352567, 'Exception occurred.', (0, 'Provider',
> 'Tabl
> e does not exist.', None, 1240640, -2147217865), None)
>
> C:\Documents and Settings\Administrator\Desktop\pytest>
> "Roger Upole" <rupole at hotmail.com> wrote in message
> news:1140144965_1489 at sp6iad.superfeed.net...
> > You could also accomplish the same thing using the
> > Command object, but this way is usually more concise
> > for plain Sql.
> >
> >          Roger
> >
> > "LittlePython" <LittlePython at lost.com> wrote in message
> > news:UtaJf.78260$_D1.52493 at trnddc03...
> > > I notice there is no adodb.command. This is not required?
> > > Thx for the example!
> > > "Roger Upole" <rupole at hotmail.com> wrote in message
> > > news:1140142239_1425 at sp6iad.superfeed.net...
> > > > Here's a short example that uses ADO to search for a
> > > > user by wildcard.
> > > >
> > > > import win32com.client
> > > > c = win32com.client.Dispatch("ADODB.Connection")
> > > > c.Open("Provider=ADSDSOObject")
> > > >
> > > > rs,rc=c.Execute("""
> > > > SELECT adspath, title, name
> > > > From 'LDAP://DC=yourdomain, DC=COM'
> > > > where objectClass='user' and name='Roger*'
> > > > """)
> > > >
> > > > while not rs.EOF:
> > > >     for f in rs.Fields:
> > > >         print f.Name, f.Value
> > > >     rs.MoveNext()
> > > >
> > > >     hth
> > > >           Roger
> > > >
> > > > "LittlePython" <LittlePython at lost.com> wrote in message
> > > > news:56aJf.78250$_D1.4370 at trnddc03...
> > > > > Thanks but I was looking more for ADO com object than ADSI or
ldap.
> > > > > For some strange reason it is very hard to locate any working
> scripts
> > > that
> > > > > use ADO  to connect and search AD. Is there an issue with ADO and
> > python
> > > > > when connecting to AD?
> > > > > I have try to build one myself with no luck. I think my problem is
> > with
> > > > > adodb.command calls.
> > > > >
> > > > > Thanks for your response.
> > > > >
> > > > > "alex23" <wuwei23 at gmail.com> wrote in message
> > > > > news:1140138661.484502.86380 at f14g2000cwb.googlegroups.com...
> > > > > > Heya,
> > > > > >
> > > > > > There are a couple of examples on the O'Reilly site. These two
are
> > > > > > taken from 'Active Directory Cookbook', the first uses a COM
> object
> > > > > > while the second uses a native LDAP module:
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
http://www.rallenhome.com/books/adcookbook/src/18.6-rootdse_python_com.py.tx
> > > > > t
> > > > > >
> > > > >
> > > >
> > >
> >
>
http://www.rallenhome.com/books/adcookbook/src/18.6-rootdse_python_ldap.py.t
> > > > > xt
> > > > > >
> > > > > > This might give you a start.
> > > > > >
> > > > > > - alex23
> > > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > > > ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure
Usenet
> > > News==----
> > > > http://www.newsfeeds.com The #1 Newsgroup Service in the World!
> 120,000+
> > > Newsgroups
> > > > ----= East and West-Coast Server Farms - Total Privacy via
Encryption
> > > =----
> > >
> > >
> >
> >
> >
> > ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet
> News==----
> > http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+
> Newsgroups
> > ----= East and West-Coast Server Farms - Total Privacy via Encryption
> =----
>
>
>



----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----


From tuvas21 at gmail.com  Tue Feb 21 18:03:54 2006
From: tuvas21 at gmail.com (Tuvas)
Date: 21 Feb 2006 15:03:54 -0800
Subject: Module question
In-Reply-To: <43fb934f$1_1@newspeer2.tds.net>
References: <1140559897.172126.43820@o13g2000cwo.googlegroups.com>
	<43fb934f$1_1@newspeer2.tds.net>
Message-ID: <1140563034.236190.183510@f14g2000cwb.googlegroups.com>

Most of these are indeed independed of Tkinter, except for a status
report message that is often sent in response. I' have a few small
files already that do this, however, I would ike to be able to put
several that do in fact need to post status messages as well. There are
about 2400 lines of code in the main module right now, and about 1000
in smaller modules, but I would like to move some more, the problem is,
most of the function in my tkinter function use somehow the master tk()
variable. I don't know if there's any way around it or not, just trying
to find a way. Mine is a somewhat unusual program wherein that the
majority of the funcionality is in fact as a GUI, it mostly runs
programs from other mediums, it controls an external device, so there
isn't much in the line of real gruntwork that the program does. Thanks
for the help!



From strombrg at dcs.nac.uci.edu  Thu Feb 16 22:14:00 2006
From: strombrg at dcs.nac.uci.edu (Dan Stromberg)
Date: Fri, 17 Feb 2006 03:14:00 GMT
Subject: Databases and python
References: <pan.2006.02.14.08.06.18.754312@dcs.nac.uci.edu>
	<Yl%If.13638$2O6.13570@newssvr12.news.prodigy.com>
Message-ID: <pan.2006.02.17.03.17.08.569209@dcs.nac.uci.edu>

On Thu, 16 Feb 2006 13:45:28 +0000, Bryan Olson wrote:

> Dan Stromberg wrote:
>> I've been putting a little bit of time into a file indexing engine
> [...]
> 
>> So far, I've been taking the approach of using a single-table database
>> like gdbm or dbhash [...] and making each entry keyed by
>> a word, and under the word in the database is a null terminated list of
>> filenames (in http://dcs.nac.uci.edu/~strombrg/base255.html representation).
>> 
> [...]
>> the program just isn't performing like I'd like it to.
>  >
>> And I think it's because despite the caching and minimal representation
>> conversion, it's still just too slow converting linear lists to arrays
>> back and forth and back and forth.
> 
> I think I follow. The straightforward method of building the
> list of files associated with a word is order n**2 time. On each
> new entry, you look up the entire string, append one file-id to
> it, and write the new version back.

Yes, essentially, with the twist that the most recently used words are
kept cached in memory, so they don't have to be converted from string to
list and back to string every time a filename is added to a word.

>> So this leads me to wonder - is there a python database interface that
>> would allow me to define a -lot- of tables?  Like, each word becomes a
>> table, and then the fields in that table are just the filenames that
>> contained that word.  That way adding filenames to a word shouldn't bog
>> down much at all.
> 
> Well, you could use simple files instead of fancy database tables.

That's an interesting thought.  Perhaps especially if australopithecine
were saved in a filename like:

~/indices/au/st/ra/lo/pi/th/ec/in/e 

> Below is a demo of an alternate technique that uses bsddb B-Trees,
> and puts both the word and the file-id in the key. I don't know
> how efficient it is for real data, but at least the time won't grow
> as Theta(n**2).

Perhaps I'm missing something, but is it not roughly O(1) for
individual insertions, but O(n*m) (n == number of files, m == number of
words) for lookups?

> --Bryan
> 
> 
> 
> import bsddb
> import urllib
> 
> 
> def add_words_from_file(index, fname, word_iterator):
>      """ Pass the open-for-write bsddb B-Tree, a filename, and a list
>          (or any interable) of the words in the file.
>      """
>      fname = urllib.quote_plus(fname)
>      s = set()
>      for word in word_iterator:
>          if word not in s:
>              s.update(word)
>              key = '%s %s' % (urllib.quote_plus(word), fname)
>              index[key] = ''
>      index.sync()
> 
> 
> def lookup(index, word):
>      """ Pass the B-Tree (as built with add_words_from_file) and a
>          word to look up. Returns list of files containing the word.
>      """
>      word = urllib.quote_plus(word)
>      fname_list = []
>      try:
>          current = index.set_location(word)
>          while True:
>              (key, _) = current
>              (w, fname) = key.split()
>              if w != word:
>                  break
>              fname_list.append(urllib.unquote_plus(fname))
>              current = index.next()
>      except KeyError:
>          pass
>      return fname_list
> 
> 
> def test():
>      index = bsddb.btopen('junktest.bdb', 'n')
>      data =[
>          ('bryfile.txt', 'nor heed the rumble of a distant drum'),
>          ('junkfile.txt', 'this is the beast, the beast so sly'),
>          ('word file.txt', 'is this the way it always is here in Baltimore')
>      ]
>      for (fname, text) in data:
>          words = text.split()
>          add_words_from_file(index, fname, words)
> 
>      for word in ['is', 'the', 'heed', 'this', 'way']:
>          print '"%s" is in files: %s' % (word, lookup(index, word))
> 
> test()



From btaranto at gmail.com  Mon Feb 13 14:11:05 2006
From: btaranto at gmail.com (btaranto at gmail.com)
Date: 13 Feb 2006 11:11:05 -0800
Subject: python-ldap
In-Reply-To: <t3c1v1ljv4csitbf12k9o0goj96qlmkncb@4ax.com>
References: <1139330793.864675.302090@f14g2000cwb.googlegroups.com>
	<mailman.1559.1139333846.27775.python-list@python.org>
	<1139335345.415395.41690@g43g2000cwa.googlegroups.com>
	<t3c1v1ljv4csitbf12k9o0goj96qlmkncb@4ax.com>
Message-ID: <1139857865.618762.320810@g14g2000cwa.googlegroups.com>

hy...

if you dont know how to help people here... dont say "google it".

groups.google was made to help! not to say google it!

i really dont not what kind of professional you are to say "google it!"

you are smart boy!

i think your mom has much pride of you!

google it to learn more than say "google it!"



From sandravandale at yahoo.com  Mon Feb 27 12:24:27 2006
From: sandravandale at yahoo.com (Sandra-24)
Date: 27 Feb 2006 09:24:27 -0800
Subject: ''.join() with encoded strings
Message-ID: <1141061067.253803.267540@i39g2000cwa.googlegroups.com>

I'd love to know why calling ''.join() on a list of encoded strings
automatically results in converting to the default encoding. First of
all, it's undocumented, so If I didn't have non-ascii characters in my
utf-8 data, I'd never have known until one day I did, and then the code
would break. Secondly you can't override (for valid reasons) the
default encoding, so that's not a way around it. So ''.join becomes
pretty useless when dealing with the real (non-ascii) world.

I won't miss the str class when it finally goes (in v3?).

How can I join my encoded strings effeciently?

Thanks,
-Sandra



From webraviteja at gmail.com  Tue Feb 14 01:01:53 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 13 Feb 2006 22:01:53 -0800
Subject: Jedit
In-Reply-To: <ziggy-358301.20045813022006@netnews.asp.att.net>
References: <ziggy-358301.20045813022006@netnews.asp.att.net>
Message-ID: <1139894098.074832.324250@f14g2000cwb.googlegroups.com>


ziggy wrote:
> Just wondering if there is something out there like Jedit, but written
> in python ( not just supporting, but actually written in it.. )
>
> Nothing large like Stanzi's or Boa.. Just something quick and simple,
> with code completion, and a debugger..

PythonWin, so long as you are on Windows.

By Stanzi, are you are referring to SPE? I don't regard it as heavy.
It's just over 1 MB download (JEdit is 2 MB).



From fredrik at pythonware.com  Tue Feb 21 13:16:29 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 21 Feb 2006 19:16:29 +0100
Subject: No
References: <1140534490.873612.64280@g47g2000cwa.googlegroups.com><1140539240.807314.283280@g43g2000cwa.googlegroups.com><mailman.2248.1140542337.27775.python-list@python.org>
	<1140544942.394795.240520@g47g2000cwa.googlegroups.com>
Message-ID: <dtfldv$qbe$1@sea.gmane.org>

"Gaz" wrote:

> Im running it in my test site at F2o.org. Perhaps its server's fault
> and not script's fault. I'll deal this issue at its forums.

according to their FAQ, they run Red Hat Enterprise Linux.  I'm pretty
sure RHEL doesn't come with a C: drive...

</F>





From kp8 at mac.com  Mon Feb 27 03:29:34 2006
From: kp8 at mac.com (kpp9c)
Date: 27 Feb 2006 00:29:34 -0800
Subject: ls files --> list packer
In-Reply-To: <1141016518.080809.259990@j33g2000cwa.googlegroups.com>
References: <1140765792.864556.289820@i40g2000cwc.googlegroups.com>
	<1140767111.490691.42460@e56g2000cwe.googlegroups.com>
	<dtml8u$1vh$1@gemini.csx.cam.ac.uk>
	<1141012342.805500.308750@i39g2000cwa.googlegroups.com>
	<440273e8$1_1@newspeer2.tds.net>
	<1141016518.080809.259990@j33g2000cwa.googlegroups.com>
Message-ID: <1141028974.265354.285090@v46g2000cwv.googlegroups.com>

nice! two little lines that do a boatload of work! hee hee

----
pth = '/Users/kpp9c/snd/01'
samples = [os.path.join(pth, f) for f in os.listdir(pth) if
f.endswith('.aif')]
----

thank you Kent! (and Jeremy and Magnus and Singletoned and I V ... and
john boy and mary ellen .. )



From carsten at uniqsys.com  Wed Feb  8 12:47:26 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 08 Feb 2006 12:47:26 -0500
Subject: email questions
In-Reply-To: <FDD3FDB3-EF9C-4F85-9599-37AF617DED18@pacbell.net>
References: <FDD3FDB3-EF9C-4F85-9599-37AF617DED18@pacbell.net>
Message-ID: <1139420846.28143.41.camel@dot.uniqsys.com>

On Wed, 2006-02-08 at 12:34, Scott Frankel wrote:
> I'm looking for a way to send a simple, plain text email message  
> using Python.  My initial attempts are failing with the following error:
> 
> 	socket.error: (61, 'Connection refused')
> 
> Does this imply that I do not have the machine's smtp server  
> running?

Yes.

>   (I don't; and I'd like to avoid setting it up.)

You don't have to set up an smtp server to use smtplib. You should be
able to use your ISP's outgoing mail server, as in

s = smtplib.SMTP("<ISP's mail server name goes here>")

HTH,

Carsten.




From "jay\" at (none)  Sat Feb 25 19:23:26 2006
From: "jay\" at (none) (none)
Date: Sat, 25 Feb 2006 17:23:26 -0700
Subject: Is Python a Zen language?
In-Reply-To: <1140895845.832636.269460@e56g2000cwe.googlegroups.com>
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
	<9o1Mf.39804$H71.16633@newssvr13.news.prodigy.com>
	<1140895845.832636.269460@e56g2000cwe.googlegroups.com>
Message-ID: <QdudndcONIlIRZ3ZRVn-rw@comcast.com>

John Coleman wrote:
> Bryan Olson wrote:
> 
>>John Coleman wrote:
>>
>>>   I have a rough classification of languages into 2 classes: Zen
>>>languages and tool languages. A tool language is a language that is,
>>>well, a *tool* for programming a computer. C is the prototypical tool
>>>language. Most languages in the Algol family are tool languages. Visual
>>>Basic and Java are also tool languages. On the other hand, a Zen
>>>language is a language which is purported to transform your way of
>>>thinking about programming. Lisp, Scheme, Forth, Smalltalk and (maybe)
>>>C++ are Zen languages.
>>
>>I think that's a horrible classification. Every language is both.
>>"Transform your way of thinking" from what? There is no
>>distinguished canonical view of what a programming language looks
>>like, from which all others must be strange and wondrous
>>transformations.
>>
>>Lisp and Forth are not tools for programming a computer? Of course
>>they are. Algol and Java don't transform people's thinking about
>>programming? Nonsense.
>>
>>
>>--
>>--Bryan
> 
> 
> You seem to have completly overlooked both the hedge word "rough" in my
> first sentence and the qualifications in my third paragraph. I probably
> was not sufficiently clear that I was describing some fairly sunjective
> impressions.  It is a simple observation that devotees of the Scheme
> language view their language as more than *just* a tool for programming
> computers. To quote from the introduction to the first edition of SICP:
> 
> "we want to establish the idea that a computer language is not just a
> way of getting a computer to perform operations but rather that it is a
> novel formal medium for expressing ideas about methodology"
> (http://mitpress.mit.edu/sicp/full-text/book/book.html).
> It is also a simple observation that experts in VBScript *don't* walk
> around talking like that. Scheme and VBScript are of course both Turing
> complete, but they seem to have radically different cultures. Do you
> disagree? Or, if you agree that there is a difference but don't like
> the words "Zen" vs. "tool" to describe it, how would you articulate the
> difference?
> 
> Again, just curious.

It's a metter of perspective.  Python didn't change my thinking about 
programming.  Smalltalk changed my way of thinking about programming 
very radically.  All Python changed my thinking about was how to better 
program in Python.  Python to me just happened to be a very pragmmatic 
and productive tool for getting the job done.  It happens to be 
comfrotable because large parts of it already fit into my way of 
thinking from long use in Smalltalk, but my description of Pythong would 
be 'cleanly practical' not 'zen'


From live4love at arcor.de  Tue Feb 28 08:10:39 2006
From: live4love at arcor.de (Kai Teuber)
Date: Tue, 28 Feb 2006 14:10:39 +0100
Subject: PyQT: QDialog and QMainWindow interacting with each other
In-Reply-To: <dtvtds$mt8$03$1@news.t-online.com>
References: <dtvtds$mt8$03$1@news.t-online.com>
Message-ID: <44044bd3$0$13795$9b4e6d93@newsread4.arcor-online.net>

Fabian Steiner schrieb:
> MyDialog is closed by calling MyDialog.accept(). What can I do so that 
> self.showListViewItems() is called after MyDialog has been closed?
> 
> Thank you for any input!


Hi Fabian,

override the accept() method and call self.showListViewItems() there.
But remember to call QDialog.accept() at the end.

def accept( self ):
	self.showListViewItems()
	QDialog.accept( self )


Kai Teuber


From adelagon at gmail.com  Tue Feb 28 12:42:26 2006
From: adelagon at gmail.com (Alvin A. Delagon)
Date: Tue, 28 Feb 2006 17:42:26 +0000
Subject: Fetching the Return results of a spawned Thread
Message-ID: <44048B82.4020508@gmail.com>

Is there any way to fetch the Return results of spawned threads within 
the parent script? I would like to do that because I'm having problems 
with Threads that do queries to a database, I often encounter Threads 
failing due to MySQL connection failures. As much as possible I plan to 
make the threads return the query string and let the parent script do 
the actual query. Thanks in advance.


From mensanator at aol.com  Tue Feb  7 18:37:49 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 7 Feb 2006 15:37:49 -0800
Subject: Too Many if Statements?
In-Reply-To: <1139351963.726417.115530@g44g2000cwa.googlegroups.com>
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<dsaqkj$jhm$1@xenon.Stanford.EDU>
	<GU8Gf.22899$Jd.6095@newssvr25.news.prodigy.net>
	<1139351963.726417.115530@g44g2000cwa.googlegroups.com>
Message-ID: <1139355469.147516.40860@f14g2000cwb.googlegroups.com>


slogging_away wrote:
> Hmmm - good responses all around.  Thank you all for your valued
> feedback.
>
> Perhaps it's too may 'if' statements under the for XXX in range(x,x,x)

Have you tried xrange() instead of range()?

> statement as most of the 'if' statements appear there.  It could be
> something entirely else.  I'm afraid its a bug with Python, (if I try
> and run it several times it keeps going to the IDLE console prompt and
> it eventually crashes out of Python entirely).
>
> Some useful suggestions were provided in terms of better design so that
> may be my route at this point.  Thanks again for all of your help!



From alexandre.fayolle at logilab.fr  Wed Feb 15 07:36:44 2006
From: alexandre.fayolle at logilab.fr (Alexandre Fayolle)
Date: Wed, 15 Feb 2006 13:36:44 +0100
Subject: [ANN] pyqonsole-0.2.0
Message-ID: <mailman.1955.1140018042.27775.python-announce-list@python.org>

Logilab has released pyqonsole-0.2.0

Pyqonsole is a X Window terminal written in Python. The code is based
on konsole, and it uses the Qt toolkit. It is mainly meant for use by
Python application developpers who would like to embed a terminal in
their application, but it can be used as a not blazingly fast XTerm
replacement.

Download: http://www.logilab.org/projects/pyqonsole
Mailing List: http://www.logilab.org/mailinglists/python_projects

-- 
Alexandre Fayolle                              LOGILAB, Paris (France).
http://www.logilab.com   http://www.logilab.fr  http://www.logilab.org
Retrait du projet de loi DADVSI: http://eucd.info/petitions/index.php?petition=2
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From nick.smallbone at gmail.com  Wed Feb 22 13:47:34 2006
From: nick.smallbone at gmail.com (Nick Smallbone)
Date: 22 Feb 2006 10:47:34 -0800
Subject: How to force creation of a .pyc?
References: <1140630718.197661.104730@o13g2000cwo.googlegroups.com>
Message-ID: <1140634054.530852.23640@g14g2000cwa.googlegroups.com>

mrstephengross wrote:
> I would like to distribute a python program, but only in .pyc form (so
> that people cannot simply look at my code). Is there a way to do this?
> I've read up a little on the logic by which python creates .pyc's, and
> it sounds like python requires the main executed program to be in .py
> format. Any ideas?
>

If your main program is in main.py, you could perhaps launch it with
python -c "import main", or make another file which just does import
main. Then you could keep just the .pycs/.pyos.

But it's possible for a determined user to recover a lot of information
about the source code. For example, if I write

def foo(a):
   for i in range(a):
      print i

then

>>> dis.dis(foo)
  2           0 SETUP_LOOP              25 (to 28)
              3 LOAD_GLOBAL              0 (range)
              6 LOAD_FAST                0 (a)
              9 CALL_FUNCTION            1
             12 GET_ITER
        >>   13 FOR_ITER                11 (to 27)
             16 STORE_FAST               1 (i)

  3          19 LOAD_FAST                1 (i)
             22 PRINT_ITEM
             23 PRINT_NEWLINE
             24 JUMP_ABSOLUTE           13
        >>   27 POP_BLOCK
        >>   28 LOAD_CONST               0 (None)
             31 RETURN_VALUE

where 0..12 makes an iterator for range(a), 16..19 updates i and 22..23
prints it out. It would be possible to turn it into equivalent source
code. Decompyle (from
http://ftp.debian.org/debian/pool/main/d/decompyle/decompyle_2.3.2.orig.tar.gz)
can even do that.



From jeff at schwabcenter.com  Wed Feb 22 08:52:04 2006
From: jeff at schwabcenter.com (Jeffrey Schwab)
Date: Wed, 22 Feb 2006 13:52:04 GMT
Subject: why does close() fail miserably on popen with exit code -1 ?!
In-Reply-To: <1140557616.536916.195910@o13g2000cwo.googlegroups.com>
References: <1140416836.030294.289800@f14g2000cwb.googlegroups.com>
	<StqKf.15045$915.11149@southeast.rr.com>
	<1140557616.536916.195910@o13g2000cwo.googlegroups.com>
Message-ID: <80_Kf.17234$915.3553@southeast.rr.com>

Atanas Banov wrote:
> Jeffrey Schwab wrote:
> 
>>_PyPclose returns the exit status of the popened process (the popenee?),
>>or -1 on error.  Of course, if the status is supposed to be -1, there's
>>some confusion.
> 
> 
> yes, that's what i thought the root of the problem is.
> 
> 
>>In the snippet of code below (from Modules/posixmodule.c), result has
>>been initialized to the output of fclose, which in your case is 0.  The
>>comment is particularly handy.
>>
> 
> ....
> 
>>		/* Indicate failure - this will cause the file object
>>		 * to raise an I/O error and translate the last
>>		 * error code from errno.  We do have a problem with
>>		 * last errors that overlap the normal errno table,
>>		 * but that's a consistent problem with the file object.
>>		 */
> 
> 
> the piece you quoted is from the unix #ifdef part, i think. there is
> another version of the pypclose for windows below that.
> 
> in any event i think such behaviour is a bug - just because in unix
> exit codes are limited to 0..255 (and returned multiplied by 256)
> doesnt mean other OSes should suffer because of design flow in
> _PyPclose, right?
> 
> throwing an IOError "no error" doesnt help.
> 
> is there a bug database for python where i can check if this was
> discussed?

Yes, there's a bug database linked from python.org; search the main page 
for "Bugs".

Here's the most (seemingly) relevant bug report I can find:
http://sourceforge.net/tracker/index.php?func=detail&aid=602245&group_id=5470&atid=105470


From ivoras at __yahoo__.com_  Mon Feb 13 14:58:19 2006
From: ivoras at __yahoo__.com_ (Ivan Voras)
Date: Mon, 13 Feb 2006 20:58:19 +0100
Subject: Pythonic gui format?
In-Reply-To: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
Message-ID: <dsqocq$dcq$1@bagan.srce.hr>

Gregory Petrosyan wrote:
> I have to write  _simple_  gui library, for embedding into game. My
> first attempt was to use XML

...

> But after reading "Python Is Not Java"
> http://dirtsimple.org/2004/12/python-is-not-java.html  (BTW I'm not a
> Java programmer) I realised that it is actually not cute at all :) (am
> I wrong here?)

Don't do that :)

Don't listen to recommendations for or against a technology based only 
on vague "this is not how we do things around here" reasons. If XML 
suits your need, than use it. It seems it will work fine in situations 
where you need to edit/extend the GUI by external means. If you do it in 
code, you risk that you'll need to change the code every time you want 
to reposition a GUI element. It doesn't matter much if you invent your 
own file format because eventually you'll have to extend it, or write 
support for it, so you could as well use XML from the start.

XML parsing can be a little tedious, but there are many tools that make 
it easier (I've even written one: http://ivoras.sharanet.org/xmldict.py.gz).


From jeremy+complangpython at jeremysanders.net  Thu Feb  9 05:22:30 2006
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Thu, 09 Feb 2006 10:22:30 +0000
Subject: PyGTK
References: <1139413605.029688.130040@f14g2000cwb.googlegroups.com>
Message-ID: <dsf556$2om$1@gemini.csx.cam.ac.uk>

Huy wrote:

> What I am curious to know is whether anyone has come across any
> noteworthy gui development platforms.  Cross compatibility is not a
> must, but a bonus.  Good documentation and clarity is essential for me.
>  Also, I imagine I can use modules for image manipulation in tandem
> with the GUI interface?  Any comments or speculations are looked
> forward to.  Just thought I'd see if there's anything out there the
> community knows I may not be currently aware of.

PyQt is very easy to use and Qt is well documented, see
http://www.riverbankcomputing.co.uk/pyqt/

The main issue is whether the licence of your code is compatible with the
GPL licensing of Qt and PyQt. If not you will need a commercial license.

I've used it in combination with numarray for image manipulation (however
NumPy is probably better than numarray now). I suppose it depends on what
sort of image manipulation you need.

Jeremy

-- 
Jeremy Sanders
http://www.jeremysanders.net/


From codecraig at gmail.com  Fri Feb 10 09:42:59 2006
From: codecraig at gmail.com (py)
Date: 10 Feb 2006 06:42:59 -0800
Subject: Create dict from two lists
In-Reply-To: <1139582434.128805.148730@o13g2000cwo.googlegroups.com>
References: <1139579518.129742.265680@o13g2000cwo.googlegroups.com>
	<453k9eF444frU1@uni-berlin.de>
	<dsi70h$48e$1@aphrodite.grec.isp.9tel.net>
	<1139581243.360298.164070@g43g2000cwa.googlegroups.com>
	<1139582434.128805.148730@o13g2000cwo.googlegroups.com>
Message-ID: <1139582579.185438.204730@g44g2000cwa.googlegroups.com>

Iain King wrote:
> Short answer - you can't.  Dictionaries aren't sequential structures,
> so they have no sorted form.  You can iterate through it in a sorted
> manner however, as long as you keep your list of keys:
>
> keys.sort()
> for k in keys:
>     print d[k]
> 
> Iain

duh!....thanks.



From gregory.petrosyan at gmail.com  Sun Feb 26 12:05:03 2006
From: gregory.petrosyan at gmail.com (Gregory Petrosyan)
Date: 26 Feb 2006 09:05:03 -0800
Subject: python-list/python-dev quoting style
References: <dtml9t$367$1@gemini.csx.cam.ac.uk><dtnjdt$n9q$1@panix2.panix.com>
	<dto7um$ils$1@gemini.csx.cam.ac.uk> <dtoti4$nmj$1@panix3.panix.com>
	<dtouti$327$1@gemini.csx.cam.ac.uk>
	<1200ktdnodqqr26@corp.supernews.com>
	<dtpo4l$jml$1@gemini.csx.cam.ac.uk>
	<mailman.2432.1140879887.27775.python-list@python.org>
	<1200u9m81c2tdc9@corp.supernews.com>
	<dtq8q8$n0n$1@gemini.csx.cam.ac.uk>
Message-ID: <1140973503.897977.65050@v46g2000cwv.googlegroups.com>

"me" wrote:
> I see.
> --
> me

Wonderfull.



From kp8 at mac.com  Fri Feb 24 02:23:12 2006
From: kp8 at mac.com (kpp9c)
Date: 23 Feb 2006 23:23:12 -0800
Subject: ls files --> list packer
Message-ID: <1140765792.864556.289820@i40g2000cwc.googlegroups.com>

I would like to use the power of Python to build some list structures
for me.

Namely i have organized a bunch of folders that have soundfiles in them
and would like Python to slurp up all the .aif/.aiff (or .wav whatever)
files in a given set of directories. My friend hacked up this is perl:

$files = `ls /snd/Public/*.aiff`;

@snd_filelist = split('\n',$files);

$i = 0;
while ($file = @snd_filelist[$i]) {
   print "file $i = @snd_filelist[$i]\n";
   $i++;
}


The only catch with the above code (besides its hideousness hee hee) is
if you have a directory w/i the structure, but in general it works and
with this i can just put gobs of files into separate dirs pack them
into a list and then send them to my script that scrambles them and
plays them.

I would like something similar, that works with python that is more
elegant and maybe even more robust.

but i am failing miserably and my perl friends mock me.

cheers,
kp8



From rays at blue-cove.com  Wed Feb 15 16:32:48 2006
From: rays at blue-cove.com (RayS)
Date: Wed, 15 Feb 2006 13:32:48 -0800
Subject: pyHook and Win98 key events
Message-ID: <6.2.3.4.2.20060215132937.03096cc0@pop-server.san.rr.com>

(Note: there's not a lot of traffic on Win32, so I'm cross-posting here...)
	
To debug pyKeyLogger, I wrote this with pyHook (and compiled with
py2exe on Win2K), which prints the ascii codes as expected on Win2K:

import pyHook
import time
import pythoncom
def OnKeyboardEvent(event):
    print event.Ascii
def main():
    hm = pyHook.HookManager()
    hm.KeyDown = OnKeyboardEvent
    hm.HookKeyboard()
    while True:
      pythoncom.PumpMessages()
if __name__ == '__main__':
main()

It silently does nothing on Win98...
What is needed? py2exe on 98? I did test it on a fresh install of 98...
I also just thought about trying loading ANSI.SYS at boot, but I
can't test until tomorrow.

Thanks,
Ray 



From fuzzyman at gmail.com  Sat Feb 18 07:24:42 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 18 Feb 2006 04:24:42 -0800
Subject: [ANN] Movable python Trial Version
Message-ID: <1140265482.657543.193060@z14g2000cwz.googlegroups.com>

Hot on the heels of `Movable Python 1.0.1
<http://www.voidspace.org.uk/python/movpy/>`_, is the release of a free
trial version of **Movable Python**.

This is the full distribution for Python 2.3.5. To download (and play
with it), visit `Movable python Demo
<http://www.tradebit.com/filedetail.php/734815>`_.

You can obtain the full version from the `Groups Page
<http://voidspace.tradebit.com/groups.php>`_.

It is set to expire on the 22nd May, and displays a nag screen on
startup. Other than that, it is the full version. Have fun.

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml



From xavier.morel at masklinn.net  Thu Feb  9 17:37:13 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Thu, 09 Feb 2006 23:37:13 +0100
Subject: creat a DOM from an html document
In-Reply-To: <hr6Gf.1933$rL5.1215@newssvr27.news.prodigy.net>
References: <hr6Gf.1933$rL5.1215@newssvr27.news.prodigy.net>
Message-ID: <dsgfv9$4c9$1@apollon.grec.isp.9tel.net>

Mark Harrison wrote:
> I thought I saw a package that would create a DOM from html, with
> allowances that it would do a "best effort" job to parse
> non-perfectly formed html.
> 
> Now I can't seem to find this... does anybody have a recommendation
> as to a good package to look at?
> 
> Many TIA!
> Mark
While it doesn't generate a W3C DOM, BeautifulSoup is probably your best 
bet for parsing less-than-perfect HTML and get something useable out of it.

Once you have your (parsed) document, you can either use it as is or try 
to convert it to a valid W3C DOM though.


From fredrik at pythonware.com  Mon Feb 20 15:40:23 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 20 Feb 2006 21:40:23 +0100
Subject: Canvas clicking stuff
References: <1140466964.673708.207240@o13g2000cwo.googlegroups.com>
Message-ID: <dtd9fo$tae$1@sea.gmane.org>

Tuvas wrote:

> I have a picture that is being displayed on a canvas interface, that I
> want to do the following. When a mouse button is clicked on the canvas,
> I want to pass to a function the X and Y coordinates of where this
> mouse button was pushed.

use event bindings:

http://effbot.org/tkinterbook/tkinter-events-and-bindings.htm

</F>





From mikael at isy.liu.se  Tue Feb 21 02:47:04 2006
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Tue, 21 Feb 2006 08:47:04 +0100
Subject: Tkinter Checkboxes
In-Reply-To: <1140477331.298891.153330@g14g2000cwa.googlegroups.com>
References: <1140477331.298891.153330@g14g2000cwa.googlegroups.com>
Message-ID: <dteg9l$m9$1@news.lysator.liu.se>

D wrote:
> Ok, I'm sure this is something extremely simple that I'm missing,
> but..how do I set a variable in a Tkinter Checkbox?  i.e. I have a
> variable "test" - if the checkbox is selected, I want to set test=1,
> otherwise 0.  Thanks!
> 

http://www.pythonware.com/library/tkinter/introduction/x3897-patterns.htm


/MiO


From tim.golden at viacom-outdoor.co.uk  Tue Feb 14 08:53:47 2006
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 14 Feb 2006 13:53:47 -0000
Subject: file names longer than MAX_PATH under Windows 2003
Message-ID: <9A28C052FF32734DACB0A288A3533991044D255D@vogbs009.gb.vo.local>

[Sergey]

| "Tim Golden" <tim.golden at viacom-outdoor.co.uk> wrote in 
| message news:mailman.1897.1139918374.27775.python-list at python.org...
| [Sergey]
| 
| >Not to state the obvious, but can you cut-and-paste that long
| >string (the one starting with \\?\e:\...) from the Python
| >interpreter into the [S]tart [R]un [O]pen field to see what
| >comes up? I'm just trying to make sure of the most straightforward
| >fact: that the file you've got there definitely does exist!
| 
| I cannot do this: when I paste filename there, trail of 
| filename is missing due to length limit in input line.
| But I strongly suppose that file exists as its name was get 
| through os.listdir.

I see from another post that CreateFile cannot open your file.
That puts it further away from Python, although it doesn't
explain how some other program can see the files. Can you use 
os.startfile (or its equivalent win32api.ShellExecute from 
pywin32)? Perhaps if you were to chdir to the directory in 
question you'd be able to access the file. 

Don't know really; clutching at straws.

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
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From bobrien18 at yahoo.com  Wed Feb  1 22:06:29 2006
From: bobrien18 at yahoo.com (KraftDiner)
Date: 1 Feb 2006 19:06:29 -0800
Subject: nDimensional sparse histogram in python.
In-Reply-To: <1ha3gff.u4comocxo4ddN%aleaxit@yahoo.com>
References: <1138848672.791908.90050@g44g2000cwa.googlegroups.com>
	<1ha3gff.u4comocxo4ddN%aleaxit@yahoo.com>
Message-ID: <1138849589.663600.301610@z14g2000cwz.googlegroups.com>

Cool.
Ok so my histogram class had two methods 1) To increment a point and 2)
to get the point.

def class histo:
   def __init__(self):
       histo = {}
def update(point):
   '''searches the dictionary for point and if it exists increment the
value.
    if it doesn't exist set the value to 1'''

def get(point):
   return self.histo[point]

I'm not sure how to code up the update routine...



From trentm at ActiveState.com  Fri Feb 17 21:14:26 2006
From: trentm at ActiveState.com (Trent Mick)
Date: Fri, 17 Feb 2006 18:14:26 -0800
Subject: Komodo - Will it Lock Me In?
In-Reply-To: <yEncExpress_Rulz!_www.techsono.com_3223072898@firstva.com>
References: <yEncExpress_Rulz!_www.techsono.com_3223072898@firstva.com>
Message-ID: <20060218021426.GA30967@activestate.com>

[Matt at bag.python.org wrote]
> Hi Everybody,
> 
> If I were to use Komodo to write in Python, would it add a lot of goo to my 
> code such that I would not be able to switch to another IDE without having to 
> claw my way out of a tarpit first?

Nope. Komodo adds no goo to your code (TM).
TM's my name, not a trademark on "Komodo adds no goo to your code" --
but I'm thinking about it. :)

Perhaps you are thinking of some of the C/C++ IDEs (like Visual Studio
on Windows and Xcode on the Mac) that will help you setup of projects
using their build systems that sometimes imply a number of standard
files. Komodo doesn't mandate a build system.

> Any other thoughts on Komodo? I am considering it because I am hoping to find 
> a solution to the install-packages-until-you-go-blind aspect of Python. 
> Setting up a serious, cross-platform, gui development environment is quite a 
> struggle for a newbie.

Not sure about the "install-packages-until-you-go-blind" thing. Komodo
doesn't help you install packages into your Python implementation. Nor
does Komodo have front-ends to py2app or py2exe for wrapping up Python
code into standalone executables.

GUI development, however. Komodo's GUI Builder is intended to be a GUI
designer for simple Tkinter-based UIs. It does mandate a certain style
for your *GUI* code, but I believe that all GUI designers need to do
this.

Because I work on Komodo I am biased, so won't give you an opinion on it
relative to other tools out there.

Cheers,
Trent

-- 
Trent Mick
TrentM at ActiveState.com


From LittlePython at lost.com  Sun Feb 12 11:57:27 2006
From: LittlePython at lost.com (LittlePython)
Date: Sun, 12 Feb 2006 16:57:27 GMT
Subject: Newbie
References: <v3JHf.2731$lo3.2501@trnddc07>
	<43ef6433$0$25387$636a55ce@news.free.fr>
Message-ID: <XNJHf.2736$lo3.168@trnddc07>


"Bruno Desthuilliers" <bdesth.quelquechose at free.quelquepart.fr> wrote in
message news:43ef6433$0$25387$636a55ce at news.free.fr...
> LittlePython a ?crit :
> > Is this a good place to post python questions from newbie's, or would
you
> > suggest another board?
>
> Well, depends on how newbie you are, both to Python and to programming,
> but yes, this is at least a good place to start. You may find that most
> other newsgroups are probably not the best places to post
> python-specific questions anyway !-)
>
> We usually don't eat newbies for lunch so, in the worst case, you might
> be redirected to the python-tutor mailing-list (for ubernewbies) or the
> Fine Manual (that you are of course actively reading right now, isn't it
> ?) when appropriate.
>
> > Thx
>
> You're welcome.
>
> Another question ?-)




From reply.in.the.newsgroup at my.address.is.invalid  Mon Feb  6 12:22:02 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Mon, 06 Feb 2006 18:22:02 +0100
Subject: threads and memory
References: <mailman.1500.1139245971.27775.python-list@python.org>
Message-ID: <c81fu1968nqolca5fon7kd3edica716rh3@4ax.com>

Lee Leahu:
>I am trying to write a simple threaded application which will simulate 1000 
>connections to a remote service in order to "stress test" that the remote 
>service can handle that many connections.
[...]
>Is there a way to accomplish what I am trying to do, perhaps in a more 
>memory-friendly way?

Yes. You don't need one thread per connection:
http://docs.python.org/lib/module-asyncore.html

-- 
Ren? Pijlman


From s99999999s2003 at yahoo.com  Thu Feb 16 22:24:28 2006
From: s99999999s2003 at yahoo.com (s99999999s2003 at yahoo.com)
Date: 16 Feb 2006 19:24:28 -0800
Subject: getting the line just before or after a pattern searched
Message-ID: <1140146668.313276.91380@g43g2000cwa.googlegroups.com>

hi

i have a file something like this

abcdefgh
ijklmnopq
12345678
rstuvwxyz
.....
.....
.....
12345678
.....

whenever i search the file and reach 12345678, how do i get the line
just above and below ( or more than 1 line above/below) the pattern
12345678 and save to variables? thanks



From jearl at xmission.com  Thu Feb  9 19:13:26 2006
From: jearl at xmission.com (Jason Earl)
Date: Thu, 09 Feb 2006 17:13:26 -0700
Subject: spell check code
References: <dsdo82$92q$1@solaris.cc.vt.edu>
Message-ID: <87ek2ckr4p.fsf@workhorse.earlhome>

rtilley <rtilley at vt.edu> writes:

> What is the most common way to spell check comments in code? Are
> there any idle plugins or modules that do this?

In Emacs you can use "flyspell-prog-mode" to check strings and
comments automagically.

Just a bit of editor elitism...

Jason


From justsee at gmail.com  Wed Feb 15 05:17:10 2006
From: justsee at gmail.com (justsee at gmail.com)
Date: 15 Feb 2006 02:17:10 -0800
Subject: Downloading files using urllib in a for loop?
In-Reply-To: <mailman.1937.1139998195.27775.python-list@python.org>
References: <1139996216.765104.119260@g14g2000cwa.googlegroups.com>
	<mailman.1937.1139998195.27775.python-list@python.org>
Message-ID: <1139998630.164445.207110@f14g2000cwb.googlegroups.com>

Thanks - but have printed and verified they are valid paths and
filenames. One correction to the code I listed:
   theurl = imagepath[:-8]

For some reason the values aren't being passed through
urllib.urlretrieve properly but this makes no sense to me?



From mac at calmar.ws  Thu Feb 16 02:56:20 2006
From: mac at calmar.ws (calmar)
Date: Thu, 16 Feb 2006 08:56:20 +0100
Subject: text encodings -> subprocess.Popen or -> labelmarkup (pygtk)
Message-ID: <slrndv8c14.vea.mac@news.calmar.ws>

Hi all,

first of all, I have to say I have hardly no knowledge about that
issue.

on the program there, I have it like that:


    ,-------------------------------------------------------
    | obj = unicode(newcomment, 'utf-8')
    | newcomment = obj.encode('latin-1')
    |
    | pipe = subprocess.Popen(tot, stdout=subprocess.PIPE,\
    |        stderr=subprocess.PIPE, shell=False)
    `---

that seems to work with that construction above.

Then I think, 'what' kind of encoding I can send to an external program,
depends also on that program? Or on the environment? If, then how could
I get that environemnt? (the programs runs also under MS windows)

Well, maybe someone has some hints about encodings issues like that, and
what I can send to external commands?

thanks a lot
calmar



-- 
  calmar

          (o_  It rocks: LINUX + Command-Line-Interface
          //\
          V_/_                     http://www.calmar.ws


From lee at ricis.com  Mon Feb  6 12:06:04 2006
From: lee at ricis.com (Lee Leahu)
Date: Mon, 6 Feb 2006 11:06:04 -0600
Subject: threads and memory
Message-ID: <20060206110604.1651b09b@tiger.ricis.com>

Hi List,

I am trying to write a simple threaded application which will simulate 1000 connections to a remote service in order to "stress test" that the remote service can handle that many connections.

However, I have encountered the following error after I have started my 381st thread:

---------------------------------------------------------------------------
Traceback (most recent call last):
  File "./test.py", line 39, in ?
    current.start()
  File "/usr/lib/python2.4/threading.py", line 416, in start
    _start_new_thread(self.__bootstrap, ())
thread.error: can't start new thread
---------------------------------------------------------------------------

The command 'ps -eo pid,%cpu,%mem,rss,sz,vsz' gives at the point of error, the following information:
---------------------
pid: 5448
%cpu: 33.5
%mem: 0.6
rss: 9492
sz: 782729
vsz: 3130916
---------------------

I have 1.5GB of total ram in my computer, as evident by the command 'free':
---------------------
             total       used       free     shared    buffers     cached
Mem:       1553128    1314152     238976          0          0     357392
-/+ buffers/cache:     956760     596368
Swap:       977248       7964     969284
---------------------

An 'strace' of the script reveals the following:
NOTE the line that reads 'ENOMEM (Cannot allocate memory).
--------------------------------------------------------
futex(0x80b2b08, FUTEX_WAKE, 1)         = 1
select(0, NULL, NULL, NULL, {0, 0})     = 0 (Timeout)
write(1, "381\n", 4381
)                    = 4
futex(0x80b2b08, FUTEX_WAKE, 1)         = 0
futex(0x80b2b08, FUTEX_WAKE, 1)         = 0
futex(0x80581f8, FUTEX_WAKE, 1)         = 0
mmap2(NULL, 8392704, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = -1 ENOMEM (Cannot allocate memory)
write(2, "Traceback (most recent call last"..., 35Traceback (most recent call last):
) = 35
open("./test.py", O_RDONLY|O_LARGEFILE) = 383
write(2, "  File \"./test.py\", line 40, in "..., 34  File "./test.py", line 40, in ?
) = 34
fstat64(383, {st_mode=S_IFREG|0755, st_size=1037, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7f65000
read(383, "#!/usr/bin/python\n\nimport time\nf"..., 4096) = 1037
write(2, "    ", 4    )                     = 4
write(2, "current.start()\n", 16current.start()
--------------------------------------------------------

Is there a way to accomplish what I am trying to do, perhaps in a more memory-friendly way?

My source code is attached.

Please advise.

Thanks!

-- 
Lee Leahu                           RICIS, Inc.
Internet Technology Specialist      866-RICIS-77 Toll Free Voice (US)
lee at ricis.com                       708-444-2690 Voice (International)
http://www.ricis.com/               866-99-RICIS Toll Free Fax (US)
                                    708-444-2697 Fax (International)

RICIS, Inc. is a member of the Public Safety Alliance Group

This email and any attachments that are included in it have been scanned
for malicious or inappropriate content and are believed to be safe.


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From steve at REMOVETHIScyber.com.au  Mon Feb  6 06:21:19 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Mon, 06 Feb 2006 22:21:19 +1100
Subject: Python V2.4.2 source code
References: <43e710de$0$23286$db0fefd9@news.zen.co.uk>
	<O5FFf.1082$pC6.83@fe11.lga>
	<43e72c34$0$5007$db0fefd9@news.zen.co.uk>
	<mailman.1478.1139224408.27775.python-list@python.org>
Message-ID: <pan.2006.02.06.11.21.17.559392@REMOVETHIScyber.com.au>

On Mon, 06 Feb 2006 12:12:43 +0100, Fredrik Lundh wrote:

> John Dean wrote:
> 
>> I downloaded what I thought was the source code from
>> http://www.python.org/2.4.2/python-2.4.2.tgz
> 
> that's an error page:
> 
>     Error 404: File Not Found

Ah, that explains why it wouldn't compile...

*wink*


-- 
Steven.



From gdamjan at gmail.com  Mon Feb 13 18:52:34 2006
From: gdamjan at gmail.com (Damjan)
Date: 13 Feb 2006 15:52:34 -0800
Subject: Python 2.4.2 and Berkeley DB 4.4.20 ?
Message-ID: <1139874754.693654.229830@o13g2000cwo.googlegroups.com>

This is from the Slackware-current changelog:

d/python-2.4.2-i486-1.tgz: Upgraded to python-2.4.2.
       The bsddb module didn't build against the new 4.4.x version of
       Berkeley DB. Does anyone care? Or perhaps have a patch? :-)

Does anyone have a suggestion?



From nospamformeSVP at gmail.com  Mon Feb 20 16:22:32 2006
From: nospamformeSVP at gmail.com (Don Taylor)
Date: Mon, 20 Feb 2006 16:22:32 -0500
Subject: Newbie question: Multiple installations of Python on Windows machines
Message-ID: <dtdbur$7t0$1@sea.gmane.org>

I have Python 2.4.2 installed on a Windows XP machine.

There is an application that I want to use that refuses to install 
unless I have Python 2.3.x installed.  (The only way that I can install 
this is to use it's .exe installer)

Can I install two versions of Python on Windows, and if so is there 
something I should do to make sure that the right version is used at the 
right time?  (2.3.x with this one package, and 2.4.2 with everything else).

Thanks,

Don.



From aleaxit at yahoo.com  Mon Feb  6 00:05:11 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 5 Feb 2006 21:05:11 -0800
Subject: Importing a class, please help...
References: <a1pFf.138$CO7.124@fe02.lga>
	<ds588l$aii$1@aphrodite.grec.isp.9tel.net>
	<ByAFf.226$LI6.46@fe06.lga>
Message-ID: <1hab150.1lcyo95vm5honN%aleaxit@yahoo.com>

anon <anon at nospam.nospam> wrote:

> Xavier
> 
> Yes I meant Python.  I have also been using Jython and I am VERY WELL aware
> what a JAR is.  Jython has the ability to call methods stored in classes in
> a JAR.  I was only asking if this could be done with Python also.

Classic Python is able to import Python modules from a .zip file; it
would be a reasonably easy tweak to allow the extension to be .jar or
.foo or .zap as well as .zip -- but they'd still have to be Python
modules.  Java classes use a completely different bytecode from Classic
Python: if you need to access such JVM bytecode, use Jython instead.


Alex


From claudio.grondi at freenet.de  Wed Feb 15 12:43:53 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Wed, 15 Feb 2006 18:43:53 +0100
Subject: Python equivilant to msgbox()
In-Reply-To: <utwIf.16099$7C3.5496@trnddc08>
References: <7CQHf.2690$7C3.1780@trnddc08> <43efd40a$1_2@newspeer2.tds.net>
	<6WQHf.2700$7C3.2665@trnddc08>
	<dsq6oc$lb8$1@newsreader3.netcologne.de>
	<3buIf.32386$lo3.16580@trnddc07>
	<dstup1$rm$1@newsreader3.netcologne.de>
	<utwIf.16099$7C3.5496@trnddc08>
Message-ID: <dsvp7n$qr$1@newsreader3.netcologne.de>

LittlePython wrote:
>  I am glad you did remind me of WScript.Shell ... I have to keep in mind
> that most if not all of what I have been using in VBS is avail to me.
> Thx
Maybe in this context it could be also worth for you to know, that on 
Windows you can use Python as a scripting language embedded in HTML 
<script> blocks same way as you can use JScript and VBScript. This makes 
the Internet browser a very good GUI alternative for anyone able to 
write HTML code utilizing the appropriate scripting interface to the 
interactive HTML page elements.

Claudio


From steve at REMOVETHIScyber.com.au  Sat Feb 11 20:06:28 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sun, 12 Feb 2006 12:06:28 +1100
Subject: Is python very slow compared to C
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
Message-ID: <pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>

On Sat, 11 Feb 2006 13:52:03 -0800, bearophileHUGS wrote:

> Yes this language is very slow, 

Very slow to do what, compared to what? The decay time of the tau meson?

Slowness is not an absolute quantity. Slowness is relative, and comments
like "Python is very slow" just reinforces the meme that execution speed
is the only important factor -- even if you follow up with a good (and
correct) description of why raw CPU speed is rarely an issue, it is too
late, you've reinforced the meme "only C is good".

I would challenge the assertion that *any* serious modern language is
"very slow" on modern hardware in any meaningful sense. There are plenty
of *specific tasks* which are too slow when written in one language or
another, but that's not the same thing.


-- 
Steven.



From keith at nekotaku.com  Tue Feb 28 22:43:51 2006
From: keith at nekotaku.com (Keith Burns)
Date: Tue, 28 Feb 2006 20:43:51 -0700
Subject: MySQLdb compile error with AMD64
Message-ID: <20060301034354.899391E4002@bag.python.org>

Found it.

Had to change
Extra_compile_args = config(cflags) to the actual list with -march=athlon64

Now just realized that I didn't download the right RPMs for MySQL for SUSE
on AMD64 (so got lib errors I am assuming cos of that).

Will download and update with what I changed in the setup.py once I get this
working.

Thanks for the pointers and getting me on the right track!

_____________________________________________
From: Keith Burns [mailto:keith at nekotaku.com] 
Sent: Tuesday, February 28, 2006 8:04 PM
To: 'python-list at python.org'
Subject: MySQLdb compile error with AMD64


>> Can anyone offer any assistance on this one?
>
>Look here:
>
>>> gcc -pthread -fno-strict-aliasing -DNDEBUG -O2 -fmessage-length=0 -Wall
>>> -D_FORTIFY_SOURCE=2 -g -fPIC -I/usr/include/mysql
>>> -I/usr/include/python2.4 -c _mysql.c -o
>>> build/temp.linux-x86_64-2.4/_mysql.o -I/usr/include/mysql -g
>>> -march=i586 -mcpu=i686 -fmessage-length=0
>
>specifically at -march=i586. MySQLdb sets CFLAGS which aren't applicable to
>your processor, and as such the compile barfs. You should probably just run
>it with something like
>
>CFLAGS="-march=athlon-64" python setup.py build
>
>I am positive that MySQLdb works on AMD64, I have it running there. Anyway,
>the CFLAGS fix should work.

Hey there!

Appreciate the help but the CFLAGS did not change the gcc -march (I tried it
as above and with CFLAGS="-march=athlon64" which I found in a GCC flag FAQ).


I realize that the -march is my problem but I can't work out how to change
it.

Any ideas?

Thanks!

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From scott.daniels at acm.org  Mon Feb  6 11:26:58 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Mon, 06 Feb 2006 08:26:58 -0800
Subject: OO conventions
In-Reply-To: <mailman.1476.1139222219.27775.python-list@python.org>
References: <mailman.1334.1138833641.27775.python-list@python.org><pan.2006.02.02.11.08.33.964@REMOVETHIScyber.com.au><1138971920.353603.38040@f14g2000cwb.googlegroups.com><1138993768.634863.166250@f14g2000cwb.googlegroups.com>	<1139221726.376326.73560@g44g2000cwa.googlegroups.com>
	<mailman.1476.1139222219.27775.python-list@python.org>
Message-ID: <43e777ab$1@nntp0.pdx.net>

Fredrik Lundh wrote:
> Nicola Musatti wrote:
>> What is important to me is to keep your get_initial_data() function
>> outside Klass if it's task is non trivial, e.g. it has to interact with
>> the OS or a DB.
> 
> why ?

In order to simplify testing.

--Scott David Daniels
scott.daniels at acm.org


From shearichard at gmail.com  Sun Feb 19 21:29:24 2006
From: shearichard at gmail.com (shearichard at gmail.com)
Date: 19 Feb 2006 18:29:24 -0800
Subject: MySQLDB - parameterised SQL - "TypeError: not all arguments
	converted during string formatting"
References: <1140395175.409078.281390@o13g2000cwo.googlegroups.com>
	<1m6iv1dc19m0jp31eqjhd82d71n6lk3aoh@4ax.com>
Message-ID: <1140402564.028967.159920@g44g2000cwa.googlegroups.com>

Hi Dennis - Thanks for your help with this ....

Dennis Lee Bieber wrote:
> On 19 Feb 2006 16:26:15 -0800, shearichard at gmail.com declaimed the
> following in comp.lang.python:
>
> > Hi - I have written some python to insert a row into a table using
> > MySQLDB. I have never before written SQL/Python using embedded
> > parameters in the SQL and I'm having some difficulties. Could someone
> > point me in the right direction please ?
> > sqlQuery = "INSERT INTO EVA_COMPANY
> > (COM_ADDRESS,COM_AUTOID,COM_COMPANY_ADDRESS,COM_STRUCT_OWNER_CODE)
> > VALUES (?,?,?,?) "
>
> 	One: I believe MySQLdb uses %s placeholders, not ?
>
> >>> import MySQLdb
> >>> MySQLdb.paramstyle
> 'format'
>
> From the DB-API PEP
>
>  paramstyle
>
>             String constant stating the type of parameter marker
>             formatting expected by the interface. Possible values are
>             [2]:
>
>                 'qmark'         Question mark style,
>                                 e.g. '...WHERE name=?'
>                 'numeric'       Numeric, positional style,
>                                 e.g. '...WHERE name=:1'
>                 'named'         Named style,
>                                 e.g. '...WHERE name=:name'
>                 'format'        ANSI C printf format codes,
>                                 e.g. '...WHERE name=%s'
>                 'pyformat'      Python extended format codes,
>                                 e.g. '...WHERE name=%(name)s'
>
>

Great stuff. I had seen some example code which used question marks and
rather too slavishly used it as a model. As you say MySQLDb does indeed
use 'format' and so %s are the way to go ...

>
> > print sqlQuery
> > sql = cursor.execute(sqlQuery,("test","NULL","Tester1017",5))
>
> 	Two: I think it is smart enough to translate a Python None to a
> MySQL NULL -- which is different from a four-character string containing
> NULL (or even a zero-character string "").

... just to confirm that yes using a Python None works fine if you wish
to put a Null into a column ...
>
> >
> > CREATE TABLE `eva_company` (
> >   `COM_AUTOID` int(9) unsigned NOT NULL auto_increment,
>
> 	As an auto-increment field, the recommendation would be to not even
> mention the field in the INSERT SQL -- that also takes care of the
> problem of specifying NULL to a non-null field!
>

... yes it didn't start off that way but I was busy trying everthing I
could think of to try to make it happier.

thanks for your help it's all working now.

regards

richard.




> --
>  > ============================================================== <
>  >   wlfraed at ix.netcom.com  | Wulfraed  Dennis Lee Bieber  KD6MOG <
>  >      wulfraed at dm.net     |       Bestiaria Support Staff       <
>  > ============================================================== <
>  >           Home Page: <http://www.dm.net/~wulfraed/>            <
>  >        Overflow Page: <http://wlfraed.home.netcom.com/>        <



From fredrik at pythonware.com  Wed Feb 15 05:30:40 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 15 Feb 2006 11:30:40 +0100
Subject: Downloading files using urllib in a for loop?
References: <1139996216.765104.119260@g14g2000cwa.googlegroups.com>
	<43F2F8A6.2060303@gatwick.westerngeco.slb.com>
Message-ID: <dsuvsi$sl5$1@sea.gmane.org>

Martin Franklin wrote:

> "No such file or directory: ''" sounds to me like you are trying
> to open a file called '' (empty string)
>
> try adding some debugging
>
>      print theimage, imagepath

or, better:

    print repr(theimage), repr(imagepath)

</F>





From g.brandl-nospam at gmx.net  Fri Feb 24 06:40:18 2006
From: g.brandl-nospam at gmx.net (Georg Brandl)
Date: Fri, 24 Feb 2006 12:40:18 +0100
Subject: Pickling/unpickling Cookie.SimpleCookie fails with protocol=2
In-Reply-To: <87acchv6cr.fsf@andreasen.org>
References: <87acchv6cr.fsf@andreasen.org>
Message-ID: <4689l2F9v1avU1@individual.net>

Erwin S. Andreasen wrote:
> Pickling a Cookie.SimpleCookie (or SmartCookie) when using protocol=2
> seems to do something very strange. Protocol 0/1 work fine:
> 
> $ python2.4
> Python 2.4.2 (#2, Nov 20 2005, 17:04:48) 
> [GCC 4.0.3 20051111 (prerelease) (Debian 4.0.2-4)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> 
>>>> import cPickle, Cookie
>>>> cPickle.loads(cPickle.dumps(Cookie.SimpleCookie('hi=there')))
> <SimpleCookie: hi='there'>
> 
> Protocol 2 however:
> 
>>>> pickle.loads(pickle.dumps(Cookie.Cookie('hi=there'),2))
> <SmartCookie: hi=<Morsel: hi='there'>>
> 
>>>>pickle.loads(pickle.dumps(Cookie.Cookie('hi=there'),2))['hi'].__dict__
> 
> {'coded_value':
> '"ccopy_reg\\012_reconstructor\\012p1\\012(cCookie\\012Morsel\\012p2\\012c__builtin__\\012dict\\012p3\\012(dp4\\012S\'comment\'\\012p5\\012S\'\'\\012sS\'domain\'\\012p6\\012S\'\'\\012sS\'version\'\\012p7\\012S\'\'\\012sS\'secure\'\\012p8\\012S\'\'\\012sS\'path\'\\012p9\\012S\'\'\\012sS\'expires\'\\012p10\\012S\'\'\\012sS\'max-age\'\\012p11\\012S\'\'\\012stRp12\\012(dp13\\012S\'coded_value\'\\012p14\\012S\'there\'\\012p15\\012sS\'value\'\\012p16\\012g15\\012sS\'key\'\\012p17\\012S\'hi\'\\012p18\\012sb."',
> 'value': <Morsel: hi='there'>, 'key': 'hi'}
> 
> 
> I can't really say what goes wrong here, but it looks like a bug to me
> -- comments? I guess I'll have to go to protocol 0 for this, or not
> serialize the cookie but re-parse it on the other side (this pickle
> gets passed down a UNIX socket together with the file descriptor of a
> request, in a load balancing system).

You can report a bug at SourceForge.

Georg


From rytoy at yahoo.com  Fri Feb 17 04:46:35 2006
From: rytoy at yahoo.com (rytoy at yahoo.com)
Date: 17 Feb 2006 10:46:35 +0100
Subject: Is there anything like ASP.NET for Python web apps ?
Message-ID: <pb6bv112sg78j19eeffoblqo0l0ejh8k0o@4ax.com>

That is dragging web 'controls' to the page in design mode, binding
controls to datasources,  and writing code for events like "page_load"
or  "button1_click" ?

I need to write a few small cross-platform, data-driven web apps 
(and I really hate J2EE...)


From peter.mosley at talk21.com  Tue Feb  7 07:28:39 2006
From: peter.mosley at talk21.com (peter.mosley at talk21.com)
Date: 7 Feb 2006 04:28:39 -0800
Subject: Unable to get PIL to load jpeg images
References: <1139263113.552140.114100@o13g2000cwo.googlegroups.com>
Message-ID: <1139315319.654694.285330@g43g2000cwa.googlegroups.com>

Someone out there must surely know - please!

Peter



From steve.horsley at gmail.com  Fri Feb 10 16:46:51 2006
From: steve.horsley at gmail.com (Steve Horsley)
Date: Fri, 10 Feb 2006 21:46:51 +0000
Subject: how to kill a python process?
In-Reply-To: <1139159404.912421.251960@g43g2000cwa.googlegroups.com>
References: <1139159404.912421.251960@g43g2000cwa.googlegroups.com>
Message-ID: <dsj1k9$t71$1@news.freedom2surf.net>

MackS wrote:
> Hello!
> 
> This question does not concern programming in python, but how to manage
> python processes. Is there a way to "name" a python process? At least
> on Linux, if I have two python programs running, they both run under
> the name "python"
> 
> #pidof program1.py
> [empty line]
> #pidof program1.py
> [empty line]
> # pidof python
> 1249 854
> 
> Is there a way to make them run under their own names, e.g., to make it
> easier to kill them by name using killall? Or am I stuck with
> registering the pid of each python process I create and then refer to
> that list whenever I need to selectively stop one of them? The latter
> makes managing a long list of processes very cumbersome...
> 
> Thanks for any help!
> 
> Mack
> 

I ran a script called test, and found this in my process list 
(sorry, the emailer wraps it):

steve    14513 14452  0 21:43 pts/2    00:00:00 /usr/bin/python 
./test

But I also find that "killall test" kills it. So you don't need 
"killall python" at all.

HTH
Steve



From michaeltaft at gmail.com  Sun Feb 12 20:21:16 2006
From: michaeltaft at gmail.com (mwt)
Date: 12 Feb 2006 17:21:16 -0800
Subject: Downloading Large Files -- Feedback?
In-Reply-To: <1hanf3e.1j28qll1hnvr5qN%aleaxit@yahoo.com>
References: <1139773494.245577.102870@g47g2000cwa.googlegroups.com>
	<1hanf3e.1j28qll1hnvr5qN%aleaxit@yahoo.com>
Message-ID: <1139793676.885331.295390@g14g2000cwa.googlegroups.com>

Thanks for the explanation. That is exactly what I'm looking for. In a
way, it's kind of neat that urlopen just *does* it, no questions asked,
but I'd like to just know the basics, which is what it sounds like
urlretrieve covers. Excellent. Now, let's see what I can whip up with
that. 

-- just bought "cookbook" and "nutshell" moments ago btw....



From adamm_n0 at spamm_blic.net  Mon Feb 20 16:52:14 2006
From: adamm_n0 at spamm_blic.net (Mladen Adamovic)
Date: Mon, 20 Feb 2006 22:52:14 +0100
Subject: editor for Python on Linux
In-Reply-To: <mailman.2176.1140458602.27775.python-list@python.org>
References: <dtai6e$23m$2@ariane.blic.net> <dtcqa0$adv$1@ariane.blic.net>
	<mailman.2176.1140458602.27775.python-list@python.org>
Message-ID: <dtddi1$h1o$1@ariane.blic.net>

Benji York wrote:
> I don't know anything about gedit, but why not take Emacs and Vim (not 
> vi) seriously?

I'm not used to their approach.

I usually program in Java but recently I reliazed if I'm making Linux 
shell scripts, Python seems to be good choice to me.

So, that Pydev Eclipse plug-in (or some other) seems interested.

-- 
Mladen Adamovic
home page: http://home.blic.net/adamm


From gregpinero at gmail.com  Tue Feb 14 12:50:42 2006
From: gregpinero at gmail.com (=?ISO-8859-1?Q?Gregory_Pi=F1ero?=)
Date: Tue, 14 Feb 2006 12:50:42 -0500
Subject: Python 3000 deat !? Is true division ever coming ?
In-Reply-To: <dst1tm$jbb$1@news.doit.wisc.edu>
References: <1139810036.943598.229030@g47g2000cwa.googlegroups.com>
	<1139928242.726349.221080@g44g2000cwa.googlegroups.com>
	<mailman.1906.1139933770.27775.python-list@python.org>
	<dst1tm$jbb$1@news.doit.wisc.edu>
Message-ID: <312cfe2b0602140950h78161d1fvd61d78fd8d04de94@mail.gmail.com>

I knew about that approach.  I just wanted less typing :-(


On 2/14/06, Rocco Moretti <roccomoretti at hotpop.com> wrote:
> Gregory Pi?ero wrote:
> > On 14 Feb 2006 06:44:02 -0800, rainbow.cougar at gmail.com
> >
> >
> >>5./2.=2.5 is floating point math, with all the round off errors that
> >>incorporates.
> >
> > Thanks Curtis, I never knew that trick.  I guess for variables do have
> > true division you have to make them floats?  e.g.
> > float(var1)/float(var2)?  Or do you know a less typing approach for
> > that?
>
> Google "python true division" -> I'm feeling lucky:
>
> http://www.python.org/doc/2.2.3/whatsnew/node7.html
>
>  From the web page:
>
> """
> * By including a from __future__ import division in a module(*), the /
> operator will be changed to return the result of true division, so 1/2
> is 0.5. Without the __future__ statement, / still means classic
> division. The default meaning of / will not change until Python 3.0.
> """
>
> *As the first non-docstring/non-comment line.
>
> Note that that's for a module -- the interactive interpreter won't
> respond the same way to the "from __future__ import" statement.
> --
> http://mail.python.org/mailman/listinfo/python-list
>


--
Gregory Pi?ero
Chief Innovation Officer
Blended Technologies
(www.blendedtechnologies.com)


From theller at python.net  Wed Feb 22 16:30:44 2006
From: theller at python.net (Thomas Heller)
Date: Wed, 22 Feb 2006 22:30:44 +0100
Subject: Newbie question: Multiple installations of Python on Windows
	machines
In-Reply-To: <dtdbur$7t0$1@sea.gmane.org>
References: <dtdbur$7t0$1@sea.gmane.org>
Message-ID: <dtil64$346$1@sea.gmane.org>

Don Taylor wrote:
> I have Python 2.4.2 installed on a Windows XP machine.
> 
> There is an application that I want to use that refuses to install 
> unless I have Python 2.3.x installed.  (The only way that I can install 
> this is to use it's .exe installer)
> 
> Can I install two versions of Python on Windows,

Yes, no problem.  I have python 2.2, 2.3, and 2.4 installed at the same time.

> and if so is there 
> something I should do to make sure that the right version is used at the 
> right time?  (2.3.x with this one package, and 2.4.2 with everything else).

You should install them in different directories, of course.
The lastest one installed will be the 'default' python, and windows file associations
will use this one.

To use the other versions, batch files (for example) work fine.

Thomas



From steve at REMOVETHIScyber.com.au  Sun Feb 26 16:41:41 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Mon, 27 Feb 2006 08:41:41 +1100
Subject: Do I need to convert string to integer in python?
References: <1140983754.000103.104710@i40g2000cwc.googlegroups.com>
Message-ID: <pan.2006.02.26.21.41.40.668359@REMOVETHIScyber.com.au>

On Sun, 26 Feb 2006 11:55:54 -0800, Allerdyce.John wrote:

> Do I need to convert string to integer in python? or it will do it for
> me (since dynamic type)?
> 
> In my python script, I have this line:
>     x /= 10;
> 
> when i run it, I get this error:
> TypeError: unsupported operand type(s) for /=: 'unicode' and 'int'

No, the Python interpreter is playing a practical joke on you when it
raises that exception. Just persevere with the x /= 10 line, and
eventually the interpreter will give in and give you the result you need.
But be warned, if it is in a particularly playful mood, you may need to
try hundreds of times before it will stop messing about and get back to
work.

By the way, semi-colons are not required at the end of lines in Python.


-- 
Steven.



From claudio.grondi at freenet.de  Sat Feb  4 09:57:43 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Sat, 04 Feb 2006 15:57:43 +0100
Subject: numeric expression from string?
In-Reply-To: <mailman.1413.1139061291.27775.python-list@python.org>
References: <mailman.1413.1139061291.27775.python-list@python.org>
Message-ID: <43E4C0E7.7030207@freenet.de>

Brian Blais wrote:
> Hello,
> 
> I have a string input from the user, and want to parse it to a number, 
> and would like to know how to do it.  I would like to be able to accept 
> arithmetic operations, like:
> 
> '5+5'
> '(4+3)*2'
> '5e3/10**3'
> 
> I thought of using eval, which will work, but could lead to bad security 
> problems (not that it's a big  deal in my app, but still...)
> 
> string.atof won't do the job.  Is there a preferred way of doing this?
> 
> 
>         thanks,
> 
> 
>             Brian Blais
> 
> 
I have no idea if it is the right thing for what you need, so it would 
be nice to get response if it is or not:
   http://www.strout.net/python/pythonica.html

Claudio


From deets at nospam.web.de  Wed Feb  8 19:10:33 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 09 Feb 2006 01:10:33 +0100
Subject: Circe released to public domain!
In-Reply-To: <mailman.1628.1139436361.27775.python-list@python.org>
References: <mailman.1628.1139436361.27775.python-list@python.org>
Message-ID: <44vfk4F43jo4U1@uni-berlin.de>

Kyle Brooks schrieb:
> Wednesday, February 8th, 2006.
> 
> Dear all,
> 
> I hereby release Circe to the public domain.
> 
> Our repo is at http://kbrooks.ath.cx/repos/circe.


This is the second post I read, followed the link, skimmed through some 
sources and READMEs, and by now I got the impression that Circe is a IRC 
client. It would help tremendously if you could mention that in your 
postings as well as in a simple introductionary HTML-page. Mentioning 
why I should use Circe and what I need to do so (wx) would help too, I 
guess.


Regards,

Diez


From xavier.morel at masklinn.net  Thu Feb  2 15:47:31 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Thu, 02 Feb 2006 21:47:31 +0100
Subject: classmethod and instance method
In-Reply-To: <1138910923.048674.264840@g49g2000cwa.googlegroups.com>
References: <1138910923.048674.264840@g49g2000cwa.googlegroups.com>
Message-ID: <drtr0v$95q$1@aphrodite.grec.isp.9tel.net>

andychambers2002 at yahoo.co.uk wrote:
> Hi,
> 
> I'm trying to write a method that needs to know both the class name and
> the  instance details
> 
> Any suggestions?
> 

What's the point of using a classmethod and an explicit cls argument 
when you can get the class object from the instance itself?

 >>> class Test(object):
	def meth(self):
		print self
		print self.__class__
		print type(self)

		
 >>> test = Test()
 >>> test.meth()
<__main__.Test object at 0x00FA1710>
<class '__main__.Test'>
<class '__main__.Test'>
 >>>


From trepca at gmail.com  Mon Feb  6 03:20:36 2006
From: trepca at gmail.com (Sebastjan Trepca)
Date: Mon, 6 Feb 2006 09:20:36 +0100
Subject: How to create a unix shell account with Python?
In-Reply-To: <1139172598.255665.241390@f14g2000cwb.googlegroups.com>
References: <mailman.1447.1139160877.27775.python-list@python.org>
	<1139172598.255665.241390@f14g2000cwb.googlegroups.com>
Message-ID: <cd329af80602060020r4d8764b1re62be5da16867f3c@mail.gmail.com>

Ok, thanks :)


On 5 Feb 2006 13:01:23 -0800, brent.chambers at gmail.com
<brent.chambers at gmail.com> wrote:
> os.system("useradd ...")
>
> Its not pretty, but it gets it done.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From durumdara at gmail.com  Tue Feb 21 04:42:06 2006
From: durumdara at gmail.com (Durumdara)
Date: Tue, 21 Feb 2006 10:42:06 +0100
Subject: Little tool - but very big size... :-(
In-Reply-To: <1140513852.240140.144160@f14g2000cwb.googlegroups.com>
References: <mailman.2211.1140513270.27775.python-list@python.org>
	<1140513852.240140.144160@f14g2000cwb.googlegroups.com>
Message-ID: <43FAE06E.3090301@gmail.com>

Hi !

Yes, it is. But that tool is designed for USB PenDrive usage.
The assessor is collect all tools it needed to see a machine(s) in the 
checked corporation.
He/she needs little programs, because he need to store the results of 
the checkings too, not the tools only.

So I need to minimalize the code size.

Thanx for help:
dd

bonono at gmail.com wrote:

>11MB is seldom a concern for today's machine.
>
>Durumdara wrote:
>  
>
>>Hi !
>>
>>I have a problem.
>>I have a little tool that can get data about filesystems and wrote it in
>>python.
>>
>>The main user asked me a GUI for this software.
>>
>>This user is needed a portable program, so I create this kind of the
>>software with Py2Exe.
>>
>>But it have very big size: 11 MB... :-(
>>
>>The dist directory:
>>2006.02.21.  10:09    <DIR>          .
>>2006.02.21.  10:09    <DIR>          ..
>>2005.09.28.  12:41            77 824 bz2.pyd
>>2006.02.21.  10:09                 0 dirlist.txt
>>2006.02.20.  12:51           611 384 library.zip
>>2006.02.15.  16:22            23 558 main.ico
>>2004.12.16.  17:22           348 160 MSVCR71.dll
>>2005.09.28.  12:41         1 867 776 python24.dll
>>2006.01.11.  12:19           102 400 pywintypes24.dll
>>2005.09.28.  12:41           405 504 unicodedata.pyd
>>2005.09.28.  12:41             4 608 w9xpopen.exe
>>2006.01.11.  12:19            73 728 win32api.pyd
>>2006.01.11.  12:20            81 920 win32file.pyd
>>2006.01.11.  12:26           106 496 win32security.pyd
>>2006.01.10.  19:09         4 943 872 wxmsw26uh_vc.dll
>>2006.02.20.  12:51            40 960 wxPyHDDirList.exe
>>2005.09.28.  12:41            69 632 zlib.pyd
>>2006.01.10.  19:13           626 688 _controls_.pyd
>>2006.01.10.  19:12           696 320 _core_.pyd
>>2006.01.10.  19:13           364 544 _gdi_.pyd
>>2006.01.10.  19:13           491 520 _misc_.pyd
>>2006.01.10.  19:13           548 864 _windows_.pyd
>>              20 file        11 485 758 byte
>>
>>I need to have more compressed result. Can I compress dll-s, pyd-s with
>>Py2Exe ?
>>Can I decrease the total size with something ?
>>
>>If not, how to I create an self-unpackager and self-starter program that
>>use an temporary directory in the disk ? With WinRar ?
>>
>>Thanx for help:
>>dd
>>    
>>
>
>  
>



From sw at wordtech-software.com  Fri Feb 10 14:03:46 2006
From: sw at wordtech-software.com (Kevin Walzer)
Date: Fri, 10 Feb 2006 14:03:46 -0500
Subject: Martin Franklin's Tkinter/Tile wrapper--where'd it go?
Message-ID: <dc539$43ece399$4275d90a$27102@FUSE.NET>

I believe Martin Franklin wrote a Tile.py wrapper for the Tk/Tile
extension, which adds theming to the core Tk widget set. It used to
reside here:

http://mfranklin.is-a-geek.org/docs/Tile/index.html

That server seems to be down. Anyone know if the wrapper is available
elsewhere? Or if someone else has written a Tile wrapper?

-- 
Kevin Walzer
iReveal: File Search Tool
http://www.wordtech-software.com


From mcbooczech at gmail.com  Mon Feb 20 03:25:03 2006
From: mcbooczech at gmail.com (Petr Jakes)
Date: 20 Feb 2006 00:25:03 -0800
Subject: editor for Python on Linux
In-Reply-To: <dtai6e$23m$2@ariane.blic.net>
References: <dtai6e$23m$2@ariane.blic.net>
Message-ID: <1140423903.462774.193920@g14g2000cwa.googlegroups.com>

Endless stories about IDEs (try to browse through this discussion group
first). Of course it depends about users personal needs and taste. So
install them and try them (I know, it's really time consuming). I thing
there is not the other way to decide which one is the best for YOU.

Petr Jakes



From michaels at rd.bbc.co.uk  Thu Feb  2 04:26:01 2006
From: michaels at rd.bbc.co.uk (Michael Sparks)
Date: Thu, 02 Feb 2006 09:26:01 +0000
Subject: beta.python.org content
References: <mailman.1094.1138298277.27775.python-list@python.org>
	<1138370625.657953.320070@g49g2000cwa.googlegroups.com>
Message-ID: <drsp2b$r2c$1@nntp0.reith.bbc.co.uk>

Kay Schluehr wrote:

> The new Python site is incredibly boring. Sorry to say this. The old
> site is/was amateurish but engaged. Now after ~15 years of existence
> Pythons looks like it wants to be popular among directors of a german
> job centers. It aims to do everything right but what could be said
> worse? The text on the beginners page tries to argue with the
> potential users in a pointless monologue. Who wants to read this text?
> Who wants to be convinced that Python is *not* slow? "Do you stop
> beating your wife?" And where is fun, irony and black humour? Why
> Python? "Python in industry" - I see chimneys of 19th century
> factories, proletarian heroes as well as futuristic hybrid robots
> superseeding humanity. "Python community" - a dutch grand-family photo
> from the beginning of the 20ths century - some ( or all? ) of the
> members are accidentally looking like Guido, "Python in science" -
> snake-like RNA strand. It need not be like this but I wonder about the
> total lack of personality.

+1

This doesn't show the vibrance of to me somewhere like Europython.
It doesn't show "Oh, and this is incredibly, cool, fun and useful". That
to me is what both http://www.turbogears.org/ and
http://www.rubyonrails.org/ do show.

RonR has 4 very simple engaging points:
   * Get Excited
   * Get Started
   * Get Better
   * Get Involved

Blindly copying something else is rarely IMO a good idea, but having
NO personality simply turns people off. I'm not sure how to fix this,
but I'd suspect starting with the visual humour style in python might
be a good place to start...

Put another way, I'd expect *python.com* [1] to look like the new site,
and *python.org* to look like something that, well, represents some of
the utter (very cool, very diverse) madness of the people involved with
python.

   [1] NB: I **really** wouldn't go to python.com, I REALLY wasn't
        expecting that.... (REALLY)


Michael.
-- 
Michael.Sparks at rd.bbc.co.uk, http://kamaelia.sourceforge.net/
British Broadcasting Corporation, Research and Development
Kingswood Warren, Surrey KT20 6NP

Totally my opinion and no-one elses and expecially not
the views of the BBC (!)



From anil.pundoor at gmail.com  Tue Feb 28 07:18:20 2006
From: anil.pundoor at gmail.com (anil.pundoor at gmail.com)
Date: 28 Feb 2006 04:18:20 -0800
Subject: Multicolumn in Tix scrolledListBox
Message-ID: <1141129100.492514.265420@j33g2000cwa.googlegroups.com>

hi
 iam using Tix ScrolledListBox widget. is there any option so that i
can disply the items in multiple colums
thanks 
Anil



From jao at geophile.com  Tue Feb 28 17:47:59 2006
From: jao at geophile.com (jao at geophile.com)
Date: Tue, 28 Feb 2006 17:47:59 -0500
Subject: Rounding up to the nearest exact logarithmic decade
In-Reply-To: <1141165716.023456.318240@u72g2000cwu.googlegroups.com>
References: <1141165716.023456.318240@u72g2000cwu.googlegroups.com>
Message-ID: <20060228174759.d30npd3k04okkwss@geophile.com>

Quoting Derek Basch <dbasch at yahoo.com>:

> Given a value (x) that is within the range (1e-1, 1e7) how do I round
> (x) up to the closest exact logarithmic decade? For instance:

How about this:

def roundup(x):
    if x < 1:
        return 1
    else:
        return '1' + ('0' * len(str(int(x))))

Jack Orenstein




From aleaxit at yahoo.com  Sat Feb 11 01:58:30 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Fri, 10 Feb 2006 22:58:30 -0800
Subject: is there a better way?
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
Message-ID: <1hakfjo.j6t8d31cslz6tN%aleaxit@yahoo.com>

markscala at gmail.com <markscala at gmail.com> wrote:

> Problem:
> 
> You have a list of unknown length, such as this: list =
> [X,X,X,O,O,O,O].  You want to extract all and only the X's.  You know
> the X's are all up front and you know that the item after the last X is
> an O, or that the list ends with an X.  There are never O's between
> X's.

If the list is incredibly long, you should use a bisection approach.
Standard module bisect in the Python library could help, but mostly as
an _example_, since it unfortunately relies on normal alphabetic order,
and alphabetically speaking X should come _after_ O, not _before_.

But the algorithm is still sound:

1. look at the midpoint.
2. if it's an X, so are all previous items -- recurse to second half
3. if it's an O, so are all following items -- recurse to first half

Getting all conditions exactly right is tricky (which is why bisect is a
good model!), but this way you get O(log N) performance for a list of
length N.

If N is not too huge, O(N) might be OK, and is, of course, way simpler
to code!-)


Alex


From John-Whitlock at ieee.org  Tue Feb 14 15:13:18 2006
From: John-Whitlock at ieee.org (JW)
Date: 14 Feb 2006 12:13:18 -0800
Subject: Rethinking the Python tutorial
In-Reply-To: <dsfqv4$shc$1@wake.carmen.se>
References: <dsfqv4$shc$1@wake.carmen.se>
Message-ID: <1139947998.625810.307170@z14g2000cwz.googlegroups.com>

Here's my two cents -

I started with the official tutorial.  It seemed up to date to me.
Things that changed from 2.4 to 2.5 changed in the tutorial as well.  I
still refer to it every few days, because it had been a useful
reference for the basic data types.  I like that it seemlessly links
into the other documents, both online and in the local MS Help format.
It took a couple of days to get through, and gave me enough of an
introduction to the library that I could get started on the Python
Challenge.  I don't think it's broken enough to throw away completely.
Bug reports filed at sf.net appear to be responded to quickly.

I haven't tried "A Byte of Python", so I can't comment.

I tried to learn from "Dive into Python", but I found that it went too
quickly.  I have a lot of C and C++ experience, but I needed the more
basic stuff, like dictionaries, tuples, etc. explained in more detail.
It was a very useful guide once I had the basics, but after my initial
experience with it I put Python away for a few months.

"Dive into Python" is not being kept up to date.  The last revision was
May 2004, and several things have changed since then.  For instance,
chapter 4, on introspection, creates a program called apihelper.py,
which uses introspection and doc strings to print the usage of an
object.  This is all great stuff, which would be part of my toolkit,
except that there is a built-in, help(), that does the same thing.  I
had to go to the downloaded source to find that out.  In other cases,
the tutorial still teaches to older versions of Python, sometimes with
notes for the newer styles, sometimes without.

Another downside is the use of internet sources for examples.  For
instance, his example for a web feed is
http://diveintomark.org/xml/atom.xml, which replies with a "410 Gone".
As you might guess, this was the author's server, and might have been
removed because of all the people taking the tutorial.  This would have
to be fixed, to make chapters 11 and 12 make much sense.

As for a wiki version of the tutorial, I think the MoinMoin docs are a
good example.  MoinMoin is a wiki engine running Python, and the
documents are distributed with each engine.  These documents can be
seen on the project website,
http://moinmoin.wikiwikiweb.de/HelpContents.  There is a second wiki at
http://moinmaster.wikiwikiweb.de/HelpContents , which contains the
"master" documents.  Those that want to help improve, correct, or
translate documents do their work on this wiki.  It lowers the number
of pages that maintainers have to review, so that a consistant quality
can be maintained.  It also is a (slight) barrier to entry, so that
casual users don't make random changes.

I think the most important thing for a tutorial is a consistant style
and a consistant idea of the user's capabilities.  This is easiest with
a single maintainer, but requires constant dilligence and a subdued ego
for a collaborative document.



From tomerfiliba at gmail.com  Fri Feb 17 21:02:14 2006
From: tomerfiliba at gmail.com (tomerfiliba at gmail.com)
Date: 17 Feb 2006 18:02:14 -0800
Subject: Difference: __iadd__ and __add__
In-Reply-To: <pdlcv1lcroqifqcsjjjj3s4dtki3n1a5df@4ax.com>
References: <pdlcv1lcroqifqcsjjjj3s4dtki3n1a5df@4ax.com>
Message-ID: <1140228134.408383.182270@o13g2000cwo.googlegroups.com>

__add__ is called for the + operator
__iadd__ is called for the += operator
if __iadd__ doesnt exist, fallbacks to __add__

you know what they say for such things: rtfm.



From usenetpublic-elessar.xyz at yahoo.it  Thu Feb 16 10:28:09 2006
From: usenetpublic-elessar.xyz at yahoo.it (EleSSaR^)
Date: Thu, 16 Feb 2006 16:28:09 +0100
Subject: looping over more than one list
References: <1140102047.341803.10400@g44g2000cwa.googlegroups.com>
Message-ID: <1preeud2sgqtf.18scfnn7yo1fk.dlg@40tude.net>

Iain King si ? profuso/a a scrivere su comp.lang.python tutte queste
elucubrazioni: 

[cut]

I think you should take a look at the zip() function.

You can use for with it like this:

for elem1, elem2, elem3 in zip(list1, list2, list3):
....



-- 
Alan Franzoni <alan.franzoni.xyz at gmail.com>
-
Togli .xyz dalla mia email per contattarmi.
Rremove .xyz from my address in order to contact me.
-
GPG Key Fingerprint:
5C77 9DC3 BD5B 3A28 E7BC 921A 0255 42AA FE06 8F3E


From nibiery at hotmail.com  Mon Feb 20 16:32:52 2006
From: nibiery at hotmail.com (nibiery at hotmail.com)
Date: 20 Feb 2006 13:32:52 -0800
Subject: getting started, .py file
Message-ID: <1140471172.783876.80400@g14g2000cwa.googlegroups.com>

I am just getting started with Python, and I think I may be thinking
about it wrong. I'd like to be able to work interactively with some
code that I've got in a file. The only interpreted language I have much
experience with is Tcl/Tk, and in that I would use "source file.tcl" in
the console to load my source. Is there a similar command in python? I
know I can run my file as a script, but since I'm just experimenting
with how the language works, I want to have more flexibility to be able
to interactively check the contents of variables and define one piece
at a time. Am I missing something obvious, or am I not thinking about
Python properly?

Thanks,
Ingrid



From cfbolz at gmx.de  Wed Feb 22 18:40:05 2006
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Thu, 23 Feb 2006 00:40:05 +0100
Subject: new wooden door step - fixing and finishing
In-Reply-To: <e9e3813b0602221405q744bb3cbl75fc1eeb557de8ed@mail.gmail.com>
References: <1140598234.454510.281820@g14g2000cwa.googlegroups.com>	<dti985$fhf$1@wake.carmen.se>
	<e9e3813b0602221405q744bb3cbl75fc1eeb557de8ed@mail.gmail.com>
Message-ID: <43FCF655.2090106@gmx.de>

Robert Boyd wrote:
> On 2/22/06, Magnus Lycka <lycka at carmen.se> wrote:
> 
>>jkn wrote:
>>
>>>Hi all
>>
>>Hi!
>>
>>
>>>    I'm considering having a go at replacing the wooden door step to
>>>our back door. The original is loose and rotting.
>>
>>Aha, like old perl scripts.
>>
>>
>>>I'm sure some of this will be clearer when I remove the (metal) door
>>>frame - how is such a step fixed? Vertical frame fixings?
>>
>>cx_freeze maybe?
>>
>>
>>>Also, any suggestions for treating/finishing such an item, subject to
>>>heavy use, to prevent future rot? I was wondering about treating it
>>>wilth liberal amounts of Teak Oil or similar...
>>
>>Perhaps a list comprehension will do? Or a regular expression?
> 
> 
> No, no, first things first -- which IDE or editor should he use, and
> which Door Framework, or should he roll his own Door?

I heard that wooden door steps will lead to much lower walking speeds. 
Isn't a low-level door step out of stone to be prefered?



From rudy.schockaert at gmail.com  Fri Feb 17 01:49:13 2006
From: rudy.schockaert at gmail.com (Rudy Schockaert)
Date: Fri, 17 Feb 2006 07:49:13 +0100
Subject: Seaching Active Directory via ADO
In-Reply-To: <1140142239_1425@sp6iad.superfeed.net>
References: <g_7Jf.33401$0H1.22606@trnddc04>
	<1140138661.484502.86380@f14g2000cwb.googlegroups.com>
	<56aJf.78250$_D1.4370@trnddc03> <1140142239_1425@sp6iad.superfeed.net>
Message-ID: <60987dac0602162249k5d46a24ex1d0202cb7b385c00@mail.gmail.com>

You could also use the excellent active_directory module of Tim Golden (
http://tgolden.sc.sabren.com/python/active_directory.html)

Your query would then become:

import active_directory

for person in active_directory.search ("objectClass='user'","name='Roger*'"):
  print person.displayName



On 2/17/06, Roger Upole <rupole at hotmail.com> wrote:
>
> Here's a short example that uses ADO to search for a
> user by wildcard.
>
> import win32com.client
> c = win32com.client.Dispatch("ADODB.Connection")
> c.Open("Provider=ADSDSOObject")
>
> rs,rc=c.Execute("""
> SELECT adspath, title, name
> >From 'LDAP://DC=yourdomain, DC=COM'
> where objectClass='user' and name='Roger*'
> """)
>
> while not rs.EOF:
>     for f in rs.Fields:
>         print f.Name, f.Value
>     rs.MoveNext()
>
>     hth
>           Roger
>
> "LittlePython" <LittlePython at lost.com> wrote in message
> news:56aJf.78250$_D1.4370 at trnddc03...
> > Thanks but I was looking more for ADO com object than ADSI or ldap.
> > For some strange reason it is very hard to locate any working scripts
> that
> > use ADO  to connect and search AD. Is there an issue with ADO and python
> > when connecting to AD?
> > I have try to build one myself with no luck. I think my problem is with
> > adodb.command calls.
> >
> > Thanks for your response.
> >
> > "alex23" <wuwei23 at gmail.com> wrote in message
> > news:1140138661.484502.86380 at f14g2000cwb.googlegroups.com...
> > > Heya,
> > >
> > > There are a couple of examples on the O'Reilly site. These two are
> > > taken from 'Active Directory Cookbook', the first uses a COM object
> > > while the second uses a native LDAP module:
> > >
> > >
> >
>
> http://www.rallenhome.com/books/adcookbook/src/18.6-rootdse_python_com.py.tx
> > t
> > >
> >
>
> http://www.rallenhome.com/books/adcookbook/src/18.6-rootdse_python_ldap.py.t
> > xt
> > >
> > > This might give you a start.
> > >
> > > - alex23
> > >
> >
> >
>
>
>
> ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet
> News==----
> http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+
> Newsgroups
> ----= East and West-Coast Server Farms - Total Privacy via Encryption
> =----
> --
> http://mail.python.org/mailman/listinfo/python-list
>



--
It is not economical to go to bed early to save the candles if the result is
twins. - Chinese Proverb
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From da.martian at gmail.com  Sat Feb 25 13:23:04 2006
From: da.martian at gmail.com (ChaosKCW)
Date: 25 Feb 2006 10:23:04 -0800
Subject: Grabbing a object from the current code block using a callable
	statement?
Message-ID: <1140891784.031515.280720@j33g2000cwa.googlegroups.com>

Hi

Is it possible to grab get an object returned from a string and a
callable ? e.g

I pass in a key value pair:

def somemethod(adict = {'new name for object': '<code to reutrn
obejct>'}):

object = .....

    for key, value in adict.items():
        if callable(value):
            somedict[key] = value()
        else:
            somedict[key] = value

such that

somedict  = {'new name for object': object} 

??

Thanks,



From enleverlesX.XmcX at XmclaveauX.com  Sun Feb 26 18:57:40 2006
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI)
Date: Mon, 27 Feb 2006 00:57:40 +0100
Subject: make a class instance from a string ?
References: <mailman.1955.1140018042.27775.python-announce-list@python.org>
	<mailman.2340.1140687820.27775.python-list@python.org>
	<1140791847.321823.21630@i40g2000cwc.googlegroups.com>
Message-ID: <440243ef$0$21297$8fcfb975@news.wanadoo.fr>

Hi!

Perso, I like this...

MCI




From duncanm255 at hotmail.com  Thu Feb 16 20:42:48 2006
From: duncanm255 at hotmail.com (D)
Date: 16 Feb 2006 17:42:48 -0800
Subject: SonicWALL Configuration
Message-ID: <1140140568.901122.134760@z14g2000cwz.googlegroups.com>

Is it possible to write a Python script to modify/configure a SonicWALL
firewall?  Or, has anyone written any useful utilities for the units
(i.e. parsing the TSR reports, etc.)?  Thanks!



From codecraig at gmail.com  Tue Feb 14 11:25:30 2006
From: codecraig at gmail.com (abcd)
Date: 14 Feb 2006 08:25:30 -0800
Subject: Win32_Process.Create -- not starting process
Message-ID: <1139934330.289815.311900@g14g2000cwa.googlegroups.com>

I am using Python to create a process on another computer.  Both
computers are on the same domain with admin privileges.

On computer B I have a batch script which starts a python script.  From
computer A I am doing the following:

import wmi
w = wmi.WMI("1.2.3.4")
p = w.new("Win32_Process")
pid, retVal = p.Create(CommandLine="C:\\a_script.bat")
print pid, retVal

The output I get is, 1218 0  ....0 = "Successful Completion"
....however the python script that is called from the batch script
never seems to run or at least only for a split second.  Sometimes I
see python.exe appear in the task manager on computer B for a split
second then it goes away.  So I went to computer B and double clicked
on the batch script, and sure enough a command opened up and the python
script was running...and stayed running...no problem.   I should
mention, that sometimes it will execute the batch script and the Python
script will run and stay running.  That has only happened after trying
to do "p.Create(CommandLine....)" more than once, but not every time I
try.

Any ideas why its not working for me remotely....or why its random?
These are win xp machines with no firewalls running.



From dylan.moreland at gmail.com  Wed Feb  8 17:11:57 2006
From: dylan.moreland at gmail.com (Dylan Moreland)
Date: 8 Feb 2006 14:11:57 -0800
Subject: What editor shall I use?
In-Reply-To: <dsd0s6$1sps$1@boco.fee.vutbr.cz>
References: <1139410110.389122.215400@z14g2000cwz.googlegroups.com>
	<dsd0s6$1sps$1@boco.fee.vutbr.cz>
Message-ID: <1139436717.623712.159780@o13g2000cwo.googlegroups.com>


Radek Kubicek wrote:
> > What editor shall I use if my Python script must contain utf-8
> > characters?
> > I use XP
>
> vim :-)
>
> > Thank you for reply
> > l.b.
>
> not for all :-)

I myself have just begun using vim. Does anyone have any
tips/convenient tweaks for python programming with it?



From aleaxit at yahoo.com  Sun Feb 26 18:49:59 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 26 Feb 2006 15:49:59 -0800
Subject: SyntaxError: can't assign to a function call
References: <1140997057.610226.101220@u72g2000cwu.googlegroups.com>
Message-ID: <1hbdijm.3cc1cz15xqd64N%aleaxit@yahoo.com>

Fuzzyman <fuzzyman at gmail.com> wrote:

> What gives ?
   ...
> >>> a = []
> >>> def f():
>       return a
   ...
> >>> f() += [4]
> SyntaxError: can't assign to function call

Exactly what the error message says: it's syntactically forbidden to
perform any assignment on a function-call.

If you're keen on these semantics, use for example

f().extend([4])

which IS quite legal (or, if you know the RHS list has only one item,
f().append(4) is clearer and more effective).


Alex


From sleepylight at gmail.com  Thu Feb  2 12:01:11 2006
From: sleepylight at gmail.com (sleepylight)
Date: 2 Feb 2006 09:01:11 -0800
Subject: Starting terminal applications from within python
Message-ID: <1138899294.111613.151980@g49g2000cwa.googlegroups.com>

Hi

I'm staring to learn python for some systems administration projects
and so far this looks like a really great alternative to using shell
for everything.  The python docs on the web site are really great, but
I could use come clarification on passing arguments using the
os.spawnlp() function.

For example, if I run  "xterm -e /opt/itt/ncbr/bin/linux/bar" I get an
xterm executing my nice little test program.  However, if I try to run
that same commad in python it doesn't work so well.

>>> os.spawnlp(os.P_NOWAIT, "/usr/bin/xterm", "/usr/bin/xterm", "-e /opt/itt/ncbr/bin/linux/bar")
4940
>>> /usr/bin/xterm:  bad command line option "-e /opt/itt/ncbr/bin/linux/bar"

usage:  /usr/bin/xterm [-/+132] [-C] [-Sccn] [-T string] [-/+ah]
[-/+ai]
    [-/+aw] [-b number] [-/+bc] [-bcf milliseconds] [-bcn milliseconds]
    [-bd color] [-/+bdc] [-bg color] [-bw number] [-/+cb] [-cc
classrange]
    [-/+cjk_width] [-class string] [-/+cm] [-/+cn] [-cr color] [-/+cu]
[-/+dc]
    [-display displayname] [-e command args ...] [-fa pattern] [-fb
fontname]
    [-/+fbb] [-/+fbx] [-fd pattern] [-fg color] [-fi fontname] [-fn
fontname]
    [-fs size] [-fw fontname] [-fwb fontname] [-fx fontname] [%geom]
[#geom]
    [-geometry geom] [-hc color] [-help] [-/+hold] [-iconic] [-/+ie]
[-/+im]
    [-into windowId] [-/+j] [-/+k8] [-kt keyboardtype] [-/+l] [-/+lc]
    [-lcc path] [-leftbar] [-lf filename] [-/+ls] [-/+mb] [-mc
milliseconds]
    [-/+mesg] [-/+mk_width] [-ms color] [-n string] [-name string] [-nb
number]
    [-/+nul] [-/+pc] [-/+pob] [-rightbar] [-/+rv] [-/+rvc] [-/+rw]
[-/+s]
    [-/+samename] [-/+sb] [-/+sf] [-/+si] [-/+sk] [-sl number] [-/+sm]
[-/+sp]
    [-/+t] [-ti termid] [-title string] [-tm string] [-tn name] [-/+u8]
    [-/+ulc] [-/+ulit] [-/+ut] [-/+vb] [-version] [-/+wc] [-/+wf]
    [-xrm resourcestring] [-ziconbeep percent]

Type /usr/bin/xterm -help for a full description.


I thought maybe I needed a space before the '-e' for some reason, but
that didn't really help:
>>> os.spawnlp(os.P_NOWAIT, "/usr/bin/xterm", "/usr/bin/xterm", " -e /opt/itt/ncbr/bin/linux/bar")
4943
>>> No absolute path found for shell:  -e /opt/itt/ncbr/bin/linux/bar

So, I guess that I'm not reading how to set up the arguments to
spawnlp() correctly.  Does anyone else have some experience with this?



From juho.schultz at helsinki.fi  Thu Feb  9 10:04:50 2006
From: juho.schultz at helsinki.fi (Juho Schultz)
Date: Thu, 09 Feb 2006 17:04:50 +0200
Subject: line wrapping problem
In-Reply-To: <P_GGf.86290$eD5.1437972@twister2.libero.it>
References: <1139484488.037165.106170@g43g2000cwa.googlegroups.com>
	<dsfbr4$426$1@oravannahka.helsinki.fi>
	<P_GGf.86290$eD5.1437972@twister2.libero.it>
Message-ID: <dsflmi$7h0$1@oravannahka.helsinki.fi>

ZeD wrote:
> Ciao, Juho Schultz! Che stavi dicendo?
> 
Moro, ZeD! Kunhan pulisen. Should we stick to English?
> 
>>should work. IMO file.write() is self-explanatory but "print >> file" is
>>a bit obscure.
> 
> is obscure only if you have never used a shell :)
> 
(I have used the shell a bit. I started using Linux at work when 2.2 
series kernels did not exist.)

Assume a newbie plays around with a piece code. If the code has 
f.write(x) or print >> f,x - in which case the newbie is more likely to 
break the code by rebinding f to something non-file? And in which case 
he will more likely understand the error message, something like "f has 
no write attribute"?

I am sure the >> can be useful - it is quick to add after a simple print 
when you want less chatter and more logfiles. But IMO it is not 
self-documenting. Having to very different uses for an operator in the 
same language is sort of confusing.


From grflanagan at yahoo.co.uk  Thu Feb 23 18:29:38 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 23 Feb 2006 15:29:38 -0800
Subject: a little more help with python server-side scripting
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<dSoLf.1663$No6.38996@news.tufts.edu>
Message-ID: <1140737378.379037.41370@e56g2000cwe.googlegroups.com>

John Salerno wrote:
>
> Ok, seems like the verdict is that the server doesn't have mod_python
> nor does it detect the .psp extension. It can, however, detect the .py
> extension. But does this mean I can simply include Python code in my
> HTML files, and then give my HTML files a .py extension?

No.

[...]

>
> ? They say:
>
> "Please note that you may map .py to .html extension. However, if you
> set this mapping, .html will not work with the normal html tags anymore."
>
> But I don't know what this means about 'mapping' the extension and what
> it means that html tags won't work anymore.

John

There is a configuration section in the IIS management tool
(inetmgr.exe) called 'Application Mappings' which maps file extensions
to applications.  For example, on my (WinXP) machine I have:

  .aspx -->
C:\WINDOWS\Microsoft.NET\Framework\v1.14322\aspnet_isapi.dll
  .asp   -->  C:\WINDOWS\system32\inetsrv\asp.dll
  .php   -->  C:\Program Files\PHP\Php51\php-cgi.exe

among others.  So if IIS receives a request for a url with one of these
extensions it passes that request on to the relevant program.  You
could map '.py' to 'python.exe %s %s' but any '.py' files would have to
be pure Python.

IIS doesn't need any help with standard, static .html requests, it can
serve those itself.  It may be possible to map '.html' to any of the
three applications above and still have static HTML pages function
identically (even if this would create a pointless overhead ), however
you couldn't map '.html' to 'python.exe' and expect anything meaningful
- there is nothing like 'python-cgi.exe' that understands HTML with or
without inlined python code.

Gerard



From eight02645999 at yahoo.com  Mon Feb 20 04:01:38 2006
From: eight02645999 at yahoo.com (eight02645999 at yahoo.com)
Date: 20 Feb 2006 01:01:38 -0800
Subject: multiple email recipients
Message-ID: <1140425098.309890.116610@o13g2000cwo.googlegroups.com>

hi
i currently am using this email function that can send single email
address
def email(HOST,FROM,TO,SUBJECT,BODY,CC=None):
    import smtplib
    import string, sys
    body = string.join((
    "From: %s" % FROM,
    "To: %s" % TO,
    "Subject: %s" % SUBJECT,
    "CC: %s" % CC,
    "",
    BODY), "\r\n")

    server = smtplib.SMTP(HOST)
    server.sendmail(FROM, [TO,CC],body)
    server.quit()

was wondering how to modify the code so as i can send to multiple email
recipients using "TO"? thanks.



From gh at ghaering.de  Tue Feb 21 08:59:18 2006
From: gh at ghaering.de (=?UTF-8?B?R2VyaGFyZCBIw6RyaW5n?=)
Date: Tue, 21 Feb 2006 14:59:18 +0100
Subject: CGI and Redirect
In-Reply-To: <dtf50n$2n3c$1@node1.news.atman.pl>
References: <dtf50n$2n3c$1@node1.news.atman.pl>
Message-ID: <43FB1CB6.80801@ghaering.de>

Grzegorz ?lusarek wrote:
> Hi All. I need to redirect user in my CGI script,  i Try to use prin 
> "Location: "+url but this is not working. Can anyone tell me what I'm 
> doing wrong?
> Any thanks will be apreciated

I guess you forgot to set the HTTP-Status. Either:

print "Status: 301"	# Moved Permanently

or

print "Status: 302"	# Moved Temporarily

HTH,

-- Gerhard


From mark at mark-fink.de  Mon Feb 13 14:21:08 2006
From: mark at mark-fink.de (Mark Fink)
Date: 13 Feb 2006 11:21:08 -0800
Subject: Jython inherit from Java class
In-Reply-To: <43ede2b8$1_1@newspeer2.tds.net>
References: <1139344211.725580.263660@g47g2000cwa.googlegroups.com>
	<43eab05b_2@newspeer2.tds.net>
	<1139594138.216488.12730@g14g2000cwa.googlegroups.com>
	<43ede2b8$1_1@newspeer2.tds.net>
Message-ID: <1139858468.679378.103640@g43g2000cwa.googlegroups.com>

Hi Kent,
many thanks for your help! In the meantime I received my "Jython
Essentials" book and hope that I have much fewer questions in the near
future.
One last question for this thread. I tried to inherit from a Java class
and override on method. I figured that this approach was nonsense
because the method used private attributes of the Java class. Now I
read that there is injection used in Jython. Jython uses setter and
getter methods to do the injection, right? Unfortunately the Java class
has no setters and getters for the private members. Is there another
way to override the method besides rewriting the Java class or is this
approach really doomed?

Cheers,
Mark



From steve at REMOVETHIScyber.com.au  Sat Feb 11 05:08:44 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sat, 11 Feb 2006 21:08:44 +1100
Subject: Legality of using Fonts
References: <1139591308.864757.154740@g44g2000cwa.googlegroups.com>
	<pan.2006.02.10.23.30.05.619934@REMOVETHIScyber.com.au>
	<1139631874.397548.37840@g47g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.11.10.08.43.753266@REMOVETHIScyber.com.au>

On Fri, 10 Feb 2006 20:24:34 -0800, Ross Ridge wrote:

> Steven D'Aprano wrote:
>> It is highly unlikely that any judge will be fooled by a mere change in
>> format ("but Your Honour, I converted the TTF file into a bitmap").
> 
> If that were true, almost the entire X11 bitmap font collection would
> be illegal.  Fonts aren't subject copyright, just the hints in most
> outline fonts, which are considered computer programs.

This may come as a shock to you, but the USA is not the entire world, and
the US government's decision to exclude typefaces from copyright
protection is anomalous. In almost the entire rest of the world,
typefaces (the design of a font) are able to be copyrighted, and so are
fonts whether they are bitmapped or outline (with or without hints).


See, for example: http://www.typeright.org/feature4.html

In any case, even in the USA, hinted fonts are copyrightable, and merely
removing the hints (say, by converting to a bitmap) is no more legal than
whiting out the author's name from a book and claiming it as your own.

Of course, like all these issues, the actual decision of a judge and jury
in the USA is uncertain -- who knows whether they will consider a
bitmapped version of a TTF font to be a derivative work or not? So even in
the USA, unless you want to spend big dollars on legal fees, the best
advice is to stick to fonts which are distributed under open licences.



-- 
Steven.



From broek at cc.umanitoba.ca  Thu Feb 16 10:47:26 2006
From: broek at cc.umanitoba.ca (Brian van den Broek)
Date: Thu, 16 Feb 2006 09:47:26 -0600
Subject: question about scope
In-Reply-To: <9J0Jf.1630$No6.38274@news.tufts.edu>
References: <9J0Jf.1630$No6.38274@news.tufts.edu>
Message-ID: <43F49E8E.2080208@cc.umanitoba.ca>

John Salerno said unto the world upon 16/02/06 09:18 AM:

<snip>

> "Name references search at most four scopes: local, then enclosing 
> functions (if any), then global, then built-in."
> 
> I understand what global and built-in are, and I thought I understood 
> the concept of local too, but when I got to this sentence (and the 
> previous sentence), I became confused about the first two scopes. What's 
> the difference between 'local' and 'enclosing functions'? I thought that 
> the only way to create a local namespace was if there *was* a function 
> definition, so now I'm confused by the apparent difference that the 
> authors are referring to. What's an example of a local scope without 
> having a function definition? Loops and if statements, perhaps?
> 
> And feel free to dissect that first sentence up above, because I just 
> don't get it.

Does this help?

IDLE 1.1.2
 >>> scope = "Global"
 >>> def test():
	scope = "enclosing"
	def nested_test():
		print scope
	nested_test()

	
 >>> test()
enclosing
 >>> def test2():
	scope = "enclosing"
	def nested_test():
		scope = "nested"
		print scope
	nested_test()

	
 >>> test2()
nested
 >>>

Best,

Brian vdB


From fuzzyman at gmail.com  Mon Feb  6 10:26:44 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 6 Feb 2006 07:26:44 -0800
Subject: Detecting line endings
In-Reply-To: <slrndueq4g.9pc.sybrenUSE@schuimige.unrealtower.org>
References: <1139236514.022464.319970@g14g2000cwa.googlegroups.com>
	<slrndueq4g.9pc.sybrenUSE@schuimige.unrealtower.org>
Message-ID: <1139239604.076712.240320@g43g2000cwa.googlegroups.com>


Sybren Stuvel wrote:
> Fuzzyman enlightened us with:
> > My worry is that if '\n' *doesn't* signify a line break on the Mac,
> > then it may exist in the body of the text - and trigger ``ending =
> > '\n'`` prematurely ?
>
> I'd count the number of occurences of '\r\n', '\n' without a preceding
> '\r' and '\r' without following '\n', and let the majority decide.
>

Sounds reasonable, edge cases for small files be damned. :-)

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml

> Sybren
> --
> The problem with the world is stupidity. Not saying there should be a
> capital punishment for stupidity, but why don't we just take the
> safety labels off of everything and let the problem solve itself?
>                                              Frank Zappa



From crutcher at gmail.com  Sun Feb 26 17:28:07 2006
From: crutcher at gmail.com (Crutcher)
Date: 26 Feb 2006 14:28:07 -0800
Subject: Use of __slots__
In-Reply-To: <mailman.2455.1140991328.27775.python-list@python.org>
References: <mailman.2455.1140991328.27775.python-list@python.org>
Message-ID: <1140992887.079510.184380@p10g2000cwp.googlegroups.com>

Steven is right, however, there is a way:

def new_record(slotlist):
  class R(object):
    __slots__ = slotlist
  return R()

record1 = new_record(["age", "name", "job"])
record1.age = 27
record1.name = 'Fred'
record1.job = 'Plumber'
record1.salary = 50000



From mrstephengross at hotmail.com  Wed Feb 15 11:44:39 2006
From: mrstephengross at hotmail.com (mrstephengross)
Date: 15 Feb 2006 08:44:39 -0800
Subject: Embedding a binary file in a python script
Message-ID: <1140021879.698353.324230@o13g2000cwo.googlegroups.com>

I want to find a way to embed a tar file *in* my python script, and
then use the tarfile module to extract it. That is, instead of
distributing two files (extractor.py and archive.tar) I want to be able
to distribute *one* file (extractor-with-embedded-archive.py). Is there
a way to do this? 

Thanks,
--Steve (mrstephengross at hotmail.com)



From scott.daniels at acm.org  Mon Feb 20 20:38:02 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Mon, 20 Feb 2006 17:38:02 -0800
Subject: how to break a for loop?
In-Reply-To: <1140476451.649515.127230@g44g2000cwa.googlegroups.com>
References: <1140476451.649515.127230@g44g2000cwa.googlegroups.com>
Message-ID: <43fa6d6c$1@nntp0.pdx.net>

Gregory Petrosyan wrote:
> Hello!
> It's 1:56 o'clock in St.-Petersburg now, and I am still coding... maybe
> that's why I encountered stupid problem: I need to remove zeros from
> the begining of list, but I can't :-(. I use
> 
>         for i,coef in enumerate(coefs):
>             if coef == 0:
>                 del coefs[i]
>             else:
>                 break
     for index, coef in enumerate(coefs):
         if coef:
             if index:
                 del coefs[: index]
             break

--Scott David Daniels
scott.daniels at acm.org


From tmp1 at reifenberg.de  Fri Feb 10 12:43:46 2006
From: tmp1 at reifenberg.de (Nebur)
Date: 10 Feb 2006 09:43:46 -0800
Subject: AdaptionFailure: How to use Interfaces with PyProtocols ?
References: <mailman.5783.1139574079.27774.python-list@python.org>
	<mailman.1709.1139576811.27775.python-list@python.org>
Message-ID: <1139593426.200680.290030@g14g2000cwa.googlegroups.com>

Yes, I adapted the instance, and it's working.That's it.
Thank you !
 Nebur



From steve at holdenweb.com  Tue Feb  7 23:20:20 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 07 Feb 2006 23:20:20 -0500
Subject: HTML page into a string
In-Reply-To: <1139367066.060542.62260@g14g2000cwa.googlegroups.com>
References: <1139367066.060542.62260@g14g2000cwa.googlegroups.com>
Message-ID: <dsbri6$61u$1@sea.gmane.org>

Tempo wrote:
> In my last post I received some advice to use urllib.read() to get a
> whole html page as a string, which will then allow me to use
> BeautifulSoup to do what I want with the string. But when I was
> researching the 'urllib' module I couldn't find anything about its
> sub-section '.read()' ? Is that the right module to get a html page
> into a string? Or am I completely missing something here? I'll take
> this as the more likely of the two cases. Thanks for any and all help.
> 
I think you've misunderstood. You call urllib.urlopen() with a URL as an 
argument. The object that this call returns is file-like (in so far as 
you can read it to get the content of the web page):

  >>> import urllib
  >>> page = urllib.urlopen("http://www.holdenweb.com/")
  >>> data = page.read()
  >>> print data
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
   <meta http-equiv="content-type" content="text/html;charset=ISO-8859-1">
   <meta name="generator" content="Adobe GoLive 6">
   <meta http-equiv="DESCRIPTION" content="Holden Web provides 
architectural design of databases and information systems, with 
full-service implementation and support">
  ...
     </tr>
   </tbody>
</table>
</div>
</body>
</html>
  >>>

You will find there are lots of other things you can do with that 
file-like object too, but reading it is the important one as far as 
using BeautifulSoup goes.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From http  Sat Feb 25 00:53:59 2006
From: http (Paul Rubin)
Date: 24 Feb 2006 21:53:59 -0800
Subject: webmail-SquirrelMail Fetcher In Python
References: <mailman.2421.1140844455.27775.python-list@python.org>
Message-ID: <7xmzggt24o.fsf@ruckus.brouhaha.com>

<brandon.mcginty at gmail.com> writes:
> I wish I could do that; however our IT department is ... Zelis ... About
> security; it's a school district, so lots of confidential data, etc, etc
> (their reason).
> Oh well, I'll look for an imap server on the network if I can, but I doubt
> I'll find it normally.
> If anyone else has any other info, I'd appreciate it.

Tell your IT dept that Squirrelmail is a security sieve.  Check the
standard ports (143, 993) for the imap server.  Yeah, you could
screen-scrape the messages from squirrelmail if you really had to, but
it doesn't seem worth it.  Are they at least running squirrelmail over
TLS if they're so security conscious?


From rtilley at vt.edu  Wed Feb 15 09:42:18 2006
From: rtilley at vt.edu (rtilley)
Date: Wed, 15 Feb 2006 09:42:18 -0500
Subject: windows security descriptors
In-Reply-To: <dstbod$sfn$1@solaris.cc.vt.edu>
References: <dstbod$sfn$1@solaris.cc.vt.edu>
Message-ID: <dsvekd$1ss$1@solaris.cc.vt.edu>

The link changed... sorry.
http://opensource.w2k.vt.edu/Win32_Perms.php


From dylan.moreland at gmail.com  Tue Feb 14 03:03:42 2006
From: dylan.moreland at gmail.com (Dylan Moreland)
Date: 14 Feb 2006 00:03:42 -0800
Subject: Splitting a string
References: <mailman.1883.1139903399.27775.python-list@python.org>
Message-ID: <1139904222.678581.324720@z14g2000cwz.googlegroups.com>

Take a look at:

http://docs.python.org/lib/node115.html#l2h-878

So I would try something like:

pat = re.compile(r" (?:AND|OR|AND NOT) ")
pat.split(string)

Compile the regular expression with re.IGNORECASE if you like.

Nico Grubert wrote:
> Dear Python users,
>
> I'd like to split a string where 'and', 'or', 'and not' occurs.
>
> Example string:
> s = 'Smith, R. OR White OR Blue, T. AND Black AND Red AND NOT Green'
>
> I need to split s in order to get this list:
> ['Smith, R.', 'White', 'Blue, T.', 'Back', 'Red', 'Green']
>
> Any idea, how I can split a string where 'and', 'or', 'and not' occurs?
> 
> 
> Thank you very much in advance,
> Nico



From reply.in.the.newsgroup at my.address.is.invalid  Thu Feb  9 20:41:16 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Fri, 10 Feb 2006 02:41:16 +0100
Subject: pythonic exec* spawn*
References: <mailman.1686.1139521339.27775.python-list@python.org>
	<lbinu19o3nkqn5elsn4dqbvoueonh93ral@4ax.com>
	<mailman.1693.1139531778.27775.python-list@python.org>
Message-ID: <barnu1li9c4vrldo6n4fd5f1uavhrdkfoa@4ax.com>

Daniel Nogradi:
>> os.fork() does that (on Mac and Unix).
>
>Okay, but how?

Sorry, fork() is implemented strictly on a 'need to know' basis :-)

>It seems to me that if the process which issued os.fork() ends, then 
>the forked process also ends.

No, no, they're not a quantum mechanic photon pair. Every process decides
for itself if and when to end. As long as it's not signalled/killed, that
is.

>But the execute of longer( data ) should keep going even though the
>original program ended. I'm pretty sure it's something basic and
>probably I'm not aware of the right concepts and that's why I can't
>find the right place to look in the docs.

You can search for "daemonize".

Here's a recipe:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66012

The concept is best explained in this book:
http://www.kohala.com/start/apue.html

-- 
Ren? Pijlman


From bill.scherer at verizonwireless.com  Wed Feb 22 13:31:34 2006
From: bill.scherer at verizonwireless.com (Bill Scherer)
Date: Wed, 22 Feb 2006 13:31:34 -0500
Subject: graph display(please help)
In-Reply-To: <78E6A2FC276AD8428A8E2DBBB540855E038A1136@NYOBGCEXMB21.uswin.ad.vzwcorp.com>
References: <78E6A2FC276AD8428A8E2DBBB540855E038A1136@NYOBGCEXMB21.uswin.ad.vzwcorp.com>
Message-ID: <43FCAE06.2070508@verizonwireless.com>

questions? wrote:

> I heard from my friend who used to program in JAVA, it is really easy
> to do graph display in JAVA.
>
> I wonder whether there are similiar packages in Python I can use. Since
> I know a little bit Python syntax  already, I can easily learn more in
> Python.
>
> I want to display connected graph(directed or undirected, most often
> trees) with coloring on them.
>
The just released yapgvb would seem to fit: 
http://sourceforge.net/projects/yapgvb

> Thanks for any suggestions!!!
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list
>



From michele.petrazzo at TOGLIunipex.it  Fri Feb 24 13:38:32 2006
From: michele.petrazzo at TOGLIunipex.it (Michele Petrazzo)
Date: Fri, 24 Feb 2006 19:38:32 +0100
Subject: Exception not raised
In-Reply-To: <43ff521d$0$29107$5fc30a8@news.tiscali.it>
References: <43ff3fc8$0$29105$5fc30a8@news.tiscali.it>
	<43ff521d$0$29107$5fc30a8@news.tiscali.it>
Message-ID: <43ff52a5$0$29107$5fc30a8@news.tiscali.it>

Michele Petrazzo wrote:
> Michele Petrazzo wrote:
>> Hi list, I have a strange error on my software on win 2k/xp and
>> debian 3.1 with py 2.3.5 / 2.4.1 + twisted + wxpython:
> 

Opss, I forgot some words :)

> Just for give evidence to my _failed_ tests, my a debugger (eric3), it

with a debugger (not my a debugger)

> see the exception, so it break with a KeyError!
> And the same code, no!

And the same code, exceute inside a terminal, no...


From nospam at nospam.com  Fri Feb 10 18:23:09 2006
From: nospam at nospam.com (3c273)
Date: Fri, 10 Feb 2006 15:23:09 -0800
Subject: installing python on a server?
References: <PB6Hf.1596$No6.37972@news.tufts.edu>
	<hntpu1pmctfaa61ns32k539nisvvljd96n@4ax.com>
	<DV6Hf.1597$No6.37987@news.tufts.edu>
	<1139610715.439681.185510@g44g2000cwa.googlegroups.com>
Message-ID: <dsj78u02j9c@enews2.newsguy.com>

"Renato" <renato.ramonda at gmail.com> wrote in message
news:1139610715.439681.185510 at g44g2000cwa.googlegroups.com...
-snip-
> On systems with package management (pretty much all of them, except
> Slack) install is a matter of a few commands. And you can automate it,
> obviously.

Slackware has package management, (pkgtool, installpkg, removepkg,
upgradepkg), it just doesn't do dependency checking.
http://www.slackbook.org/html/package-management.html
Louis




From larry.bates at websafe.com  Fri Feb 10 18:23:25 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Fri, 10 Feb 2006 17:23:25 -0600
Subject: appending to a list via properties
In-Reply-To: <1139605443.823899.141260@g47g2000cwa.googlegroups.com>
References: <1139605443.823899.141260@g47g2000cwa.googlegroups.com>
Message-ID: <3tednRjkqof6vXDeRVn-iQ@comcast.com>

Lonnie Princehouse wrote:
> Here's a curious hack I want to put up for discussion.  I'm thinking of
> writing a PEP for it.
> 
> Observation
> -----------------
> I found myself using this construct for assembling multiple lists:
> 
>     foo = []
>     qux = []
> 
>     while some_condition:
>        a, b = calculate_something()
>        foo.append(a)
>        qux.append(b)
> 
> Not elegant!  It requires temporary variables a and b, which are only
> used to populate the lists.
> 
> 
> Suggestion
> ----------------
> 
>     class better_list (list):
>         tail = property(None, list.append)
> 
>     foo = better_list()
>     qux = better_list()
> 
>     while some_condition:
>         foo.tail, qux.tail = calculate_something()
> 
> Granted, the name tail might not be the best, but you get the idea.
> 
> 
> Alternatives
> ------------------
> 
>     1. Use "append" instead, preserving original list.append behavior.
> 
>         class better_list (list):
>             append = property(lambda l: lambda x: list.append(l,x),
> list.append)
> 
>     2. Use an external wrapper, similar to operator.*getter
> 
>         class propertize (object):
>             def __init__(self, target):
>                 self.__target__ = target
>             def __setattr__(self, attribute, value):
>                 if attribute.startswith('_'): return
> object.__setattr__(self, attribute, value)
>                 else: getattr(self.__target__, attribute)(value)
> 
>         propertize(foo).append, propertize(qux).append =
> calculate_something()
> 
>    
> Well?
> 
Not entirely sure I understand, but here goes.  I normally
use list comprehensions.  I'm assuming that calculate_something()
is acting on a list of items.  If not then maybe some underlying
data refactoring is in order.  If so you write:

results=[calculate_something(x) for x in list_of_items]
foo=result[x[0] for x in results]
qux=result[x[1] for x in results]

Without knowing more about what calculate_something() does
and what condition terminates the loop it is hard to say if
this will work for you.

-Larry Bates


From mhellwig at xs4all.nl  Wed Feb 15 18:50:49 2006
From: mhellwig at xs4all.nl (Martin P. Hellwig)
Date: Thu, 16 Feb 2006 00:50:49 +0100
Subject: Question about xmlrpc and threading
In-Reply-To: <mailman.1964.1140031046.27775.python-list@python.org>
References: <mailman.1964.1140031046.27775.python-list@python.org>
Message-ID: <43f3be60$0$11071$e4fe514c@news.xs4all.nl>

David Hirschfield wrote:
> An xmlrpc client/server app I'm writing used to be super-simple, but now 
> threading has gotten into the mix.
> 
> On the server side, threads are used to process requests from a queue as 
> they come in.
> On the client side, threads are used to wait on the results of requests 
> to the server.
> 
> So the question is: how thread-safe is python xmlrpc? If the client 
> makes a request of the server by calling:
> 
> result = server.doSomething()
> 
> and while that is waiting in the background thread to complete, the 
> client calls another:
> 
> result = server.doSomethingElse()
> 
> will they interfere with each other? Right now I'm avoiding this problem 
> by queueing up calls to the server to be processed sequentially in the 
> background. But I'd prefer to allow requests to go in parallel. Should I 
> just make a new connection to the server for each request?
> 
> Any advice appreciated,
> -David
> 

I'm not sure if I quite understand what you mean by "interfere with each 
other" but namespaces also apply to xmlrpc servers.
But let's give a coding example say I have this async server created:

===
from SocketServer import ThreadingMixIn
from SimpleXMLRPCServer import SimpleXMLRPCServer
from time import sleep

# Overriding with ThreadingMixIn to create a async server
class txrServer(ThreadingMixIn,SimpleXMLRPCServer): pass

# the Test classs
class Test(object):
     def __init__(self):
         self.returnValue = "Something 1"

     def doSomething(self):
         sleep(5)
         return self.returnValue

     def doSomethingElse(self,value):
         self.returnValue=value
         return self.returnValue


# setup server and bind to the specified port
server = txrServer(('localhost', 8080))

# register test class
server.register_instance(Test())

# start the serving
server.serve_forever()
===

And I call the function
 >>> doSomething()
and while it's waiting I call
 >>> doSomethingElse("Else What!"),
doSomething() will return me:"Else What!" instead of "Something 1" 
because it's a shared namespace of "self".


Now if I modify my example to this:

===
from SocketServer import ThreadingMixIn
from SimpleXMLRPCServer import SimpleXMLRPCServer
from time import sleep

# Overriding with ThreadingMixIn to create a async server
class txrServer(ThreadingMixIn,SimpleXMLRPCServer): pass

# the Test classs
class Test(object):
     def __init__(self):
         pass

     def doSomething(self):
         returnValue = "Something 1"
         sleep(5)
         return returnValue

     def doSomethingElse(self,value):
         returnValue=value
         return returnValue


# setup server and bind to the specified port
server = txrServer(('localhost', 8080))

# register test class
server.register_instance(Test())

# start the serving
server.serve_forever()
===

 >>> doSomethingElse("Now what?")
Will have no effect on returnValue of doSomething() because they are not 
shared.

But say that I add the sleep part to doSomethingElse() and call
 >>> doSomethingElse("First")
and immediately after that on a other window
 >>> doSomethingElse("other")
What do you think will happen? Will the 2nd call overwrite the firsts 
calls variable?

I'm not going to spoil it any further ;-), please try the snippets out 
for yourself (I bet you'll be pleasantly surprised).

hth

-- 
mph


From kent at kentsjohnson.com  Wed Feb 15 08:27:20 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Wed, 15 Feb 2006 08:27:20 -0500
Subject: Embedding an Application in a Web browser
In-Reply-To: <1140005883.379440.138950@z14g2000cwz.googlegroups.com>
References: <1139930045.408507.151440@g43g2000cwa.googlegroups.com>
	<1140004056.893486.291280@g44g2000cwa.googlegroups.com>
	<1140005883.379440.138950@z14g2000cwz.googlegroups.com>
Message-ID: <43f327d8$1_2@newspeer2.tds.net>

paron wrote:
> I forgot -- I like the idea of Kerrigell, too. It runs on top of
> CherryPy

Karrigell is independent of CherryPy, it has it's own web server built in.

Kent


From jstroud at ucla.edu  Sun Feb 12 17:36:20 2006
From: jstroud at ucla.edu (James Stroud)
Date: Sun, 12 Feb 2006 14:36:20 -0800
Subject: How to invoke a tkinter menu *itself*
In-Reply-To: <W51Hf.36$Y42.9@fe07.lga>
References: <W51Hf.36$Y42.9@fe07.lga>
Message-ID: <dsod94$8aq$1@daisy.noc.ucla.edu>

Edward K. Ream wrote:
> Hi,
> 
> 
> 
> I've spent a pleasant hour or so trying to bring up a top-level Tk menu at 
> the same spot as it would appear if I had actually clicked the menu.  That 
> is, I want to bring up a menu from the keyboard.
> 
> 
> 
> The problem is computing the x and y args to menu.post.  menu.winfo_x and 
> menu.winfo_rootx are always 0, presumably be cause the menu isn't packed.
> 
> 
> 
> And I haven't been able to use menu.invoke(??) to invoke the menu *itself*. 
> One would think this would be a basic Tk functionality.
> 
> 
> 
> Any ideas?  Thanks.
> 
> 
> 
> Edward
> 
> 
> 
> P.S. Here is my best so far. (It must be run from Leo for the Leo magic to 
> work.)
> 
> 
> 
> import tkFont
> 
> name = 'File' # The menu to be invoked.
> 
> # A list of all of Leo's menus.
> 
> menus = ('File','Edit','Outline','Plugins','Cmds','Window','Help')
> 
> 
> 
> # Compute the *approximate* x offsets of each menu.
> 
> offsets = {} ; n = 0
> 
> for z in menus:
> 
>     menu = c.frame.menu.getMenu(z)
> 
>     fontName = menu.cget('font')
> 
>     font = tkFont.Font(font=fontName)
> 
>     offsets[z] = n
> 
>     # A total hack: sorta works on windows.
> 
>     n += font.measure(z+' '*4)+1
> 
> 
> 
> top = c.frame.top # Leo magic.
> 
> topx,topy = top.winfo_rootx(),top.winfo_rooty()
> 
> menu = c.frame.menu.getMenu(name) # Leo magic.
> 
> menu.post(topx+offsets.get(name,0),topy)
> 
> 
> 
> EKR
> --------------------------------------------------------------------
> Edward K. Ream   email:  edreamleo at charter.net
> Leo: http://webpages.charter.net/edreamleo/front.html
> --------------------------------------------------------------------
> 
> 
> 

Its not obvious what you want to do. If you are going to have a menu at 
all, I think you application would be better served to always have the 
toplevel menu displayed, otherwise, things can get jumpy if the window 
is always repacking. If you want the main menu to be "contextual" you 
can make two different menuas andplay with toplevel.config(menu=onemenu) 
and toplevel.config(menu=anothermenu), etc. If you just want to forget 
the menu, you can toplevel.config(menu=""), you can bring it back again 
with toplevel.config(menu=somemenu), etc. This will be jumpy. If you 
want a menu that pops up on top of a window, you might have to make 
another window with your menu of choice. Or do you want to just bring 
down a cascade menu?


From neuzhoundxx at yahoo.com  Thu Feb 16 20:36:11 2006
From: neuzhoundxx at yahoo.com (john peter)
Date: Thu, 16 Feb 2006 17:36:11 -0800 (PST)
Subject: Queue.Queue()
Message-ID: <20060217013611.36523.qmail@web36710.mail.mud.yahoo.com>

 what happens behind the scenes when i create a Queue.Queue() without specifying
  a maxsize?  does a block of space gets allocated initially then  dynamically "expanded" as needed?  if so, what is the default size  of the initial space? is it
  always better to specify a big enough maxsize initially for efficiency purposes, or
  does it matter much? Thanks in advance for any help/detail
  

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 
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From steve at REMOVETHIScyber.com.au  Thu Feb 16 17:35:43 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 17 Feb 2006 09:35:43 +1100
Subject: question about scope
References: <9J0Jf.1630$No6.38274@news.tufts.edu>
Message-ID: <pan.2006.02.16.22.35.43.132550@REMOVETHIScyber.com.au>

On Thu, 16 Feb 2006 15:18:29 +0000, John Salerno wrote:

> What's an example of a local scope without 
> having a function definition? Loops and if statements, perhaps?

List comprehensions: [2*x+1 for x in range(50)]

Lambdas: map(lambda y: y-2, [1,2,4,8,16,32])

At the moment the x in list comprehensions are exported to the rest of the
local scope, but that (mis)feature is officially going to be removed in
future versions of Python.


-- 
Steven.



From enterr at gmail.com  Tue Feb 14 18:25:07 2006
From: enterr at gmail.com (Atanas Banov)
Date: 14 Feb 2006 15:25:07 -0800
Subject: Python and ASP
References: <1139958137.733403.33640@g44g2000cwa.googlegroups.com>
Message-ID: <1139959506.980744.150750@z14g2000cwz.googlegroups.com>


Did you save it with ".asp" extension?
Is the directory enabled to run scripts?
Can you run any other server-side script snippet (say VBscript)?



From rzantow at gmail.com  Sun Feb 26 16:14:50 2006
From: rzantow at gmail.com (Rick Zantow)
Date: Sun, 26 Feb 2006 16:14:50 -0500
Subject: UnboundLocalError: local variable 'colorIndex' referenced
References: <1140987642.195734.187540@t39g2000cwt.googlegroups.com>
Message-ID: <Xns9776A545BF30Drzed@208.49.80.253>

silverburgh.meryl at gmail.com wrote in news:1140987642.195734.187540
@t39g2000cwt.googlegroups.com:

> Can you please tell me what is the meaning this error in general?
> 
>  UnboundLocalError: local variable 'colorIndex' referenced before
> assignment
> 
> In my python script,
> I have a variable define and init to 0, like this
> colorIndex  = 0
> 
> and in one of my functions,  I increment it by 1
> def myFunc 
>    colorIndex += 1
> 
> 

It's a scoping issue. Within myFunc, if colorIndex receives a value 
(that is, if you assign something to it, as you do here), Python 
requires a local variable, one known within the scope of function. If 
you had only *read* the variable (x = colorIndex, for instance), then 
Python will first look for a local variable, and, finding none, will 
then look for a global variable, which it would find in this case. The 
net effect of all this is a common gotcha for new Python users: the 
'colorIndex' that is assigned to  within myFunc is *not* the same as the 
one you assigned 0 to earlier; they just happen to share the same name. 

You can get around this in various ways. One is to declare the variable 
in myFunc, like this:
def myFunc
    	global colorIndex
    	colorIndex += 1
    	...

-- 
rzed


From rays at blue-cove.com  Wed Feb  1 00:02:48 2006
From: rays at blue-cove.com (RayS)
Date: Tue, 31 Jan 2006 21:02:48 -0800
Subject: python-list@python.org
In-Reply-To: <mailman.4400.1138753503.27774.python-list@python.org>
References: <mailman.4400.1138753503.27774.python-list@python.org>
Message-ID: <6.2.3.4.2.20060131201024.030601f0@blue-cove.com>

Hi Alan,

At 04:25 PM 1/31/2006, you wrote:
>IIUC, ASCOM is a set of Windows COM objects which provides a 
>standardised API for controlling telescopes. Since it uses Windows 
>COM, you should be able to control it easily from python using the 
>excellent win32 extensions.

Yes, I had seen it, and it looks well developed - but - it _requires_ 
Windows COM. (I do use Win32 and ctypes for talking to interface 
cards and such, that I actually get paid for) but even the company I 
do it for is migrating to LINUX (slowly) by customer demand (!) and I 
guess don't want to do new COM projects.

INDI actually looks like a great project - but - it's _only_ LINUX...
http://indi.sourceforge.net/

There are a good number of professional astro Python creations 
supported by STSCI and Enthought
http://www.stsci.edu/resources/software_hardware/

Kstars  http://edu.kde.org/kstars/indi.php looks nice but uses its 
own scripting and only runs on LINUX

I see the professional Astronomy community moving to Python, and I 
think it's a good idea to ride their coat-tails; university projects 
like Galileo and DRACO use Meade LX's as undergraduate study tools, 
with Python/LINUX.

Thanks for the reply,
Ray



From larry.bates at websafe.com  Tue Feb 28 15:55:37 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Tue, 28 Feb 2006 14:55:37 -0600
Subject: Looking for Pythonic Examples
In-Reply-To: <du24t0$1cp$03$1@news.t-online.com>
References: <du24t0$1cp$03$1@news.t-online.com>
Message-ID: <m4ednXEehNl5JZnZnZ2dnUVZ_vmdnZ2d@comcast.com>

G. V?lkl wrote:
> Hello
> I am looking for examples of Pythonic Thinking:
> 
> One example I found:
> 
> Here some lines of the web side of Bruce Eckel:
> http://www.mindview.net/WebLog/log-0053
> 
> How to read a text file:
> for line in file("FileName.txt"):
>  # Process line
> It is a easy and sophisticated thing in python,
> but hard to do or more complicated in other languages like java.
> 
> Does anyone know more examples ?
> 
> Does anyone know books about real good python programming ?
> 
> Best Regards
> 
> Gerhard

Pick up a copy of the Python Cookbook, it is full of examples.

-Larry


From robert.h.boyd at gmail.com  Thu Feb  9 12:24:31 2006
From: robert.h.boyd at gmail.com (Robert Boyd)
Date: Thu, 9 Feb 2006 12:24:31 -0500
Subject: newbie needs serious help
In-Reply-To: <8BE025E130DD4544918A767F414D260F02C80767@ttmail01.techni-tool.com>
References: <8BE025E130DD4544918A767F414D260F02C80767@ttmail01.techni-tool.com>
Message-ID: <e9e3813b0602090924q5372c8f7p6f0a0fba2eb9c51b@mail.gmail.com>

On 2/9/06, Hunsberger, Joy <joyh at techni-tool.com> wrote:

> OK. Never used python. I need it to install the Google Sitemap program on
> our WindowsServer2003(SE) server.
>

> I downloaded the Python 2.4.2 msi file, and installed it.
>
> All went well. Now, I have no idea what to do.

> And I tried to launch the python.exe, and type it in there but that doesn't
> work either.

As already mentioned, you were confusing instructions for unix
platforms with the Windows instructions. Installing with the msi and
following the prompts is all that's needed.  You say you launched
python.exe and tried to type 'configure' in it?  If by launching
python.exe means you next saw a command-line like prompt that started
with some info about python, then the >>> prompt characters, that
means you've installed Python and you're done (except for installing
Sitemap). That black window is an interactive shell -- a place to type
Python commands and see a result. You don't have to do that if all you
need is Python installed to support the Google application.

From roy at panix.com  Thu Feb 23 13:50:02 2006
From: roy at panix.com (Roy Smith)
Date: Thu, 23 Feb 2006 18:50:02 +0000 (UTC)
Subject: A C-like if statement
References: <hp-dnY20cusOnGPeRVn-rg@nmt.edu>
Message-ID: <dtl04p$5q2$1@reader2.panix.com>

Bob Greschke <bob at passcal.nmt.edu> wrote:
>I miss being able to do something like this in Python
>
>1f (I = a.find("3")) != -1:
>    print "It's here: ", I
>else:
>    print "No 3's here"
>
>where I gets assigned the index returned by find() AND the if statement gets 
>to do its job in the same line.  Then you don't have to have another like 
>that specifically gets the index of the "3".  Is there a way to do this in 
>Python?

It is a deliberate and fundamental design decision in Python that
assignment is a statement, not an expression with side effects.  This
means you often need an "extra" line compared to a classic C "assign
and test" idiom such as you have above.  I, like you, often miss the
compactness of the C idiom, but there it is.

It's also unpythonic to return magic values to indicate failure.
Throwing an exception would be the more normal way of doing it.  So,
I'd expect the above to translate into something like:

try:
    i = a.find("3")
    print "It's here: ", i
except NotFound:
    print "No 3's here"


From grahn+nntp at snipabacken.dyndns.org  Mon Feb  6 17:28:05 2006
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 6 Feb 2006 22:28:05 GMT
Subject: how to kill a python process?
References: <1139159404.912421.251960@g43g2000cwa.googlegroups.com>
	<slrnduceiv.2t1.grahn+nntp@frailea.sa.invalid>
	<1139170910.513664.169900@o13g2000cwo.googlegroups.com>
Message-ID: <slrndufjb0.2t1.grahn+nntp@frailea.sa.invalid>

On 5 Feb 2006 12:21:50 -0800, MackS <mackstevenson at hotmail.com> wrote:
> Hi Jorgen
>
> You wrote that:
>
>> $ head -1 foo3.py
>> #!/usr/bin/python
>>  $ ./foo3.py
>>
>> This is the traditional shebang form used for shell and Perl scripts,
>> and it names the process 'foo3.py' so you can killall(1) it nicely.
>
> It doesn't work on my system; I just get yet another process called
> python.

Strange ... the other shebang-able programs (interpreters) I run (/bin/sh,
perl) work like I described. That's something I expect to be standard
operating procedure on any Unix (although I haven't spent much time outside
Linux recently).

Surely the interpreter in question doesn't have to do any magic to make it
work?

> I just read that on some systems perl allows you to rename the
> process by assigning to $0:

You shouldn't have to do that. I'm pretty sure.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From mahs at telcopartners.com  Fri Feb  3 21:10:53 2006
From: mahs at telcopartners.com (Michael Spencer)
Date: Fri, 03 Feb 2006 18:10:53 -0800
Subject: Global variables, Classes, inheritance
In-Reply-To: <uc08u1p09gleqcbasarcg1714rir7t0vrs@4ax.com>
References: <uc08u1p09gleqcbasarcg1714rir7t0vrs@4ax.com>
Message-ID: <ds12dm$ctp$1@sea.gmane.org>

DaveM wrote:
> Although I've programmed for fun - on and off - since the mid 70's, I'm
> definitely an OO (and specifically Python) beginner. 
> 
> My first question is about global variables. Are they, as I'm starting to
> suspect, a sin against God or just best avoided? Having got my current
> application working using them, I'm not sure whether I want to refactor it,
> but equally, I'd like to write the best code I can.

Use them sparingly IMO

> 
> Secondly (and this is related),  if you have multiple instances of the same
> class, but need them all to have access to a dictionary created at run-time,
> is there a class way to this without calling the creation method multiple
> times? The best thought I've come up with is for the class instance to check
> its name and only if it's the first one do the dictionary creation, but I
> haven't tried it yet.
> 

Make the dictionary an attribute of the class, not the instance.  Then it will 
be visible by all the instances.  See below:


> My third difficulty is with variables in a class. What's the difference
> between the following?:
> 
> class Foo:
>     i = 12345
>     ...
> 

this sets i as an attribute of the class.


> class Foo:
>     self.i = 12345
>     ...
> 

this probably raises a NameError, unless you happen to have bound 'self' in the 
scope containing Foo, which would be a really bad idea


> class Foo:
>     def __init__(self):
>         self.i = 12345
>         ...
> 

this sets i as an attribute of the instance, self, when it is initialized

> class Foo:
>     def __init(self):
>         i = 12345
>         ...

this assigns the name 'i' in the local scope of the __init__ function.  It has 
no effect on self


So, to get your shared dictionary, you could write:
  >>> class A(object):
  ...     shared_dict = {}
  ...
  >>>
  >>> a1 = A()
  >>> a2 = A()
  >>> a1.shared_dict is a2.shared_dict
  True
  >>> a1.shared_dict["a"] = 42
  >>> a2.shared_dict["a"]
  42
  >>>

Note also, that you create "classic" classes by writing `class Foo:`, and "new 
style" classes by writing `class Foo(object):`.  There are several subtle 
differences between the two, and, since you are just starting, you might as well 
learn with the new ones.

HTH

Michael




From sybrenUSE at YOURthirdtower.com.imagination  Wed Feb 15 08:05:49 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Wed, 15 Feb 2006 14:05:49 +0100
Subject: pop line from file
References: <mailman.1939.1139998965.27775.python-list@python.org>
Message-ID: <slrndv69pd.8qf.sybrenUSE@schuimige.unrealtower.org>

Sinan Nalkaya enlightened us with:
> i searched and google long long time but couldnt find any result, i
> want pop the first line from file, i dont want to read all file
> contents because file is being updated from another proccess.

So basically, what you want is some sort of on-disk FIFO queue, right?
Unless your filesystem supports this, there is no way to do that
programmatically.

Removing the first line of a file without having to rewrite the entire
file, requires the pointer to the beginning of the data of the file to
be altered. Since this pointer usually consists of a block number, it
is impossible to point to the new start, unless all lines in the file
are exactly one block in length. This probably isn't the case.

If you're working on a UNIX platform, you could use FIFO pipes, see
'mkfifo'.

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From Mandy.Owens at jnetdirect.com  Fri Feb 24 16:31:58 2006
From: Mandy.Owens at jnetdirect.com (Mandy Owens)
Date: Fri, 24 Feb 2006 16:31:58 -0500
Subject: unsubscribe
Message-ID: <3EBB05E118D9B341A58645FA02284BD72E6C38@jnd-master.jnetdirect.com>

Can you please unsubscribe me from this list?  

Thank you,

Mandy Owens
JNetDirect
(703) 880-3842
www.jnetdirect.com
 

-----Original Message-----
From: python-list-bounces+mandy.owens=jnetdirect.com at python.org
[mailto:python-list-bounces+mandy.owens=jnetdirect.com at python.org] On
Behalf Of Steve Holden
Sent: Friday, February 24, 2006 4:16 PM
To: python-list at python.org
Subject: PyCon blog

Relaxing in the complete absence of any responsibility for the
organization, I am for the first time trying to record impressions of
each of the PyCon sessions I attend in my blog.

   http://holdenweb.blogspot.com/

Any reactions will be received with interest.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/

--
http://mail.python.org/mailman/listinfo/python-list


From uval at rz.uni-karlsruhe.de  Sat Feb 18 00:01:45 2006
From: uval at rz.uni-karlsruhe.de (=?ISO-8859-1?Q?Sch=FCle_Daniel?=)
Date: Sat, 18 Feb 2006 06:01:45 +0100
Subject: Does python have an internal data structure with functions
	imported from a module?
In-Reply-To: <mailman.2070.1140211447.27775.python-list@python.org>
References: <mailman.2070.1140211447.27775.python-list@python.org>
Message-ID: <dt5vkj$1b7$1@news2.rz.uni-karlsruhe.de>

in case you are trying it in the python shell

 >>> def foo():return "test"
...
 >>> import __main__
 >>> __main__.__dict__["foo"]
<function foo at 0x40420c6c>
 >>> __main__.__dict__["foo"]()
'test'
 >>>

otherwise build your own dict with string->function mapping

op = {
	"plus" : lambda x,y:x+y,
	"minus" : lambda x,y:x-y,
	"power" : lambda x,y:x**y,
}

op["power"](2,8)

hth, Daniel



From johnzenger at gmail.com  Tue Feb 28 15:29:27 2006
From: johnzenger at gmail.com (johnzenger at gmail.com)
Date: 28 Feb 2006 12:29:27 -0800
Subject: comple list slices
In-Reply-To: <mailman.2521.1141149956.27775.python-list@python.org>
References: <mailman.2516.1141136527.27775.python-list@python.org>
	<1141143200.110570.51680@u72g2000cwu.googlegroups.com>
	<mailman.2519.1141145363.27775.python-list@python.org>
	<1141146626.762530.282660@v46g2000cwv.googlegroups.com>
	<mailman.2521.1141149956.27775.python-list@python.org>
Message-ID: <1141158567.269567.295380@t39g2000cwt.googlegroups.com>

You don't need to copy the list; but if you don't, your original list
will be emptied.

Len(rows) recalculates each time the while loop begins.  Now that I
think of it, "rows != []" is faster than "len(rows) > 0."

By the way, you can also do this using (gasp) a control index:

def grouprows(rows):
    index = 0
    while len(rows) > index:
        rowspan = rows[index]["rowspan"]
        yield rows[index:rowspan + index]
        index += rowspan

...which kind of brings us back to where we started.



From adamm_n0 at spamm_blic.net  Mon Feb 20 11:23:42 2006
From: adamm_n0 at spamm_blic.net (Mladen Adamovic)
Date: Mon, 20 Feb 2006 17:23:42 +0100
Subject: editor for Python on Linux
In-Reply-To: <dtai6e$23m$2@ariane.blic.net>
References: <dtai6e$23m$2@ariane.blic.net>
Message-ID: <dtcqa0$adv$1@ariane.blic.net>

Mladen Adamovic wrote:
> I wonder which editor or IDE you can recommend me for writing Python 
> programs. I tried with jEdit but it isn't perfect.

I've got a lot of replies on this message.
In jEdit auto ident don't work OK.

Answers like vi, emacs and gedit I won't take seriously.
For gods sake, gedit don't even have syntax highlighting (at least on 
Centos 4.2).

I would like syntax highlighting, auto ident and if possible auto 
completition and embedded help.

I downloaded a couple of sugestions and I will try it. Thank you for 
your answers :) .

-- 
Mladen Adamovic
home page: http://home.blic.net/adamm


From dausha at gmail.com  Fri Feb 24 14:51:18 2006
From: dausha at gmail.com (Ben Wilson)
Date: 24 Feb 2006 11:51:18 -0800
Subject: editor for Python on Linux
In-Reply-To: <slrndvuejj.h2g.lee@bad-bart.lcp.nrl.navy.mil>
References: <dtai6e$23m$2@ariane.blic.net><G5dLf.426$qX4.359@fe10.lga>
	<slrndvuejj.h2g.lee@bad-bart.lcp.nrl.navy.mil>
Message-ID: <1140810678.692145.36350@j33g2000cwa.googlegroups.com>

You know, I have that for Perl, but seem never to have set up folding
for Python. I must remedy this tonight.

Ben



From nogradi at gmail.com  Mon Feb  6 10:49:19 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Mon, 6 Feb 2006 16:49:19 +0100
Subject: OO conventions
In-Reply-To: <5f56302b0602040600s22aa718bwced7fd9f327bf551@mail.gmail.com>
References: <mailman.1334.1138833641.27775.python-list@python.org>
	<pan.2006.02.01.23.03.37.881298@zetafunc.net>
	<mailman.1336.1138835495.27775.python-list@python.org>
	<1138888210.827054.68690@g49g2000cwa.googlegroups.com>
	<5f56302b0602020904h4a130392kf0a8730f5a53d097@mail.gmail.com>
	<5f56302b0602040600s22aa718bwced7fd9f327bf551@mail.gmail.com>
Message-ID: <5f56302b0602060749w4cb88b7fv1a275a87ef070917@mail.gmail.com>

> > So after all, what is a 'factory' or 'factory function'?
>
> A brief explanation in Python terms is at
> http://www.aleax.it/ep03_pydp.pdf -- "pages" (slides) 37-44 (the rest of
> the presentation is about an even more fundamental design pattern,
> "template method").  A far more extensive essay can be found, for
> example, at
> http://gsraj.tripod.com/design/creational/factory/factory.html -- it
> names the pattern "factory method", not "factory function" ("method" is
> probably a more widespread name for it) and presents examples in Java
> and Corba IDL.
>
> Anyway, trying to summarize:
>
> - "what": any function or method or other callable whose task it
> is to build and return new objects can be called "a factory";
>
> - sometimes a factory may get away with returning an existing
> object for recycling "as if" it was a new one, saving some
> resources, and this is one advantage;
>
> - a factory may choose what exact type of object to build and return
> based on arguments or other circumstances, and this is a second
> advantage.
>
> "Program to an interface, not to an implementation" -- the key
> underlying principle ot the gang of 4's "Design Patterns" book.
>
> If you build an object of a specific given type ("new Foo" in Java
> or C++), you're hardwiring the choice of implementation (the
> exact concrete type); delegating the building to a method or
> function frees your application from such hardwiring and lets
> it be concentrated (if needed at all) in one spot (the factory).
> [[With the "registry" pattern you may even be able to remove
> any hardwiring, but that's a pretty advanced and subtle idea]].
>
>
> Alex

Thank you very much, this helped a lot. Just one side note, the url
http://www.aleax.it/ep03_pydp.pdf should be
http://www.aleax.it/Python/ep03_pydp.pdf, I found your document there.
Thanks again.


From siona at chiark.greenend.org.uk  Thu Feb 23 07:42:28 2006
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 23 Feb 2006 12:42:28 +0000 (GMT)
Subject: except clause not catching IndexError
References: <dti4d8$lmn$1@mailhub227.itcs.purdue.edu>
	<8764n7dzl5.fsf@andreasen.org>
	<43FD59F7.5070302@REMOVEMEcyber.com.au>
Message-ID: <mHb*TT2-q@news.chiark.greenend.org.uk>

Steven D'Aprano  <steve at REMOVEMEcyber.com.au> wrote:
>You mean to say that "except X,Y:" gives different 
>results to "except (X,Y):"?
> [ ... ]
>And here I was thinking that commas make tuples, not 
>brackets. What is happening here?

Similar kind of thing to what's happening here:

>>> print "Hello,", "world!"
Hello, world!
>>> print ("Hello", "world!")
('Hello', 'world!')

And for that matter foo(a, b) v. foo((a, b)). Commas make
tuples, but they're also argument separators, and if you're
using a tuple as an argument you need the brackets to
indicate precedence.

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From reply.in.the.newsgroup at my.address.is.invalid  Thu Feb  9 03:54:26 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Thu, 09 Feb 2006 09:54:26 +0100
Subject: by reference
References: <1139442499.913588.89620@g14g2000cwa.googlegroups.com>
Message-ID: <gp0mu1tt73ipl47dktbk6el9ef5pd6sb1u@4ax.com>

dirvine:
>I would like to create a dictionary based on a variable [...]

And what seems to be the problem?

-- 
Ren? Pijlman


From bishukumarnaik at gmail.com  Mon Feb  6 05:30:01 2006
From: bishukumarnaik at gmail.com (Bishu Kumar Naik)
Date: Mon, 6 Feb 2006 16:00:01 +0530
Subject: subsrcibe
Message-ID: <7aeb86c10602060230j17cc7ccei672ab34ae88c1dad@mail.gmail.com>


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From onurb at xiludom.gro  Mon Feb 20 03:58:34 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Mon, 20 Feb 2006 09:58:34 +0100
Subject: Python vs. Lisp -- please explain
In-Reply-To: <87bqx3glb1.fsf@wilson.homeunix.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
Message-ID: <43f984dc$0$27151$626a54ce@news.free.fr>

Torsten Bronger wrote:
> Hall?chen!
> 
> Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> writes:
> 
> 
>>Alexander Schmolck a ?crit :
>>
>>
>>>Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> writes:
>>>
>>>
>>>>[...]
>>>>
>>>>It's not a "scripting" language, and it's not interpreted.
>>>
>>>Of course it is. What do you think happens to the bytecode?
>>
>>Ok, then what do you think happens to 'machine' code ?
>>
>>"interpreted" usually means "no compilation, all parsing etc
>>redone at each execution", which is not the case with a
>>bytecode/vm based implementation.
> 
> 
> That sounds like an implementation feature rather than a language
> feature. 

It is, of course. When we say that 'this language is
[interpreted|bytecompiled|compiled|runs on clay tablets|whatnot], we're
of course talking about the standard or reference implementation(s).

> Besides, it's not a very sensible distinction in my
> opinion.  Much better is to think about the structure of the
> interpreting machine.  I'm not a CS person (only a physicist) but if
> you *need* a bytecode interpreter on top of the CPU interpretation,
> it's an interpreted language to me.

So there are only interpreted languages nowadays.

> I've had such a discussion about TeX already, and my personal
> conclusion was that you can defend almost any opinion in that area.
> However, one should ensure that the definitions make a pragmatic and
> useful distinction.

The only pragmatic and useful distinction I can see here is between
languages that have to re-parse the whole source for each and every
executions ('interpreted') and languages that don't.


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From oliphant.travis at ieee.org  Sat Feb 18 20:08:16 2006
From: oliphant.travis at ieee.org (Travis E. Oliphant)
Date: Sat, 18 Feb 2006 18:08:16 -0700
Subject: ANN: Release of NumPy 0.9.5
In-Reply-To: <1140206151.184715.175950@o13g2000cwo.googlegroups.com>
References: <mailman.2028.1140135591.27775.python-list@python.org>	<45ljqdF7706gU1@individual.net>	<mailman.2044.1140171572.27775.python-list@python.org>	<1140203632.748504.138390@g47g2000cwa.googlegroups.com>	<mailman.2066.1140204768.27775.python-list@python.org>
	<1140206151.184715.175950@o13g2000cwo.googlegroups.com>
Message-ID: <dt8ge1$tlm$1@sea.gmane.org>

vinjvinj wrote:
> I read some of the earlier threads which essentially said that numpy is
> about 3-4 times slower then Numeric for smaller arrays. I'm assuming
> that applies only to operations that apply to the whole arrays.
> 
> I was curious how the performance of the following operations would
> compare though:
> 1. Copying arrays
> 2. Creating arrays
> 3. Slicing Arrays
> 

It is really hard to say unless you show specific applications:

But, here are some facts.

1) NumPy is in C just like Numeric
2) NumPy is more flexible than Numeric and that means a few more 
if-statements and checks which can slow-down array creation and slicing.
3) Some optimizations have been done to remove unnecessary slowness 
(e.g. unnecessary checking but more could be done).

4) Ufuncs have more overhead primarily because of

     a) the ability to alter how errors are obtained using local / 
global variables (these must be looked-up in a dictionary which is most 
of the source of any performance penalty),
     b) the ability for other objects that can be converted to arrays to 
interact with ufuncs so that the original object is returned by the ufuncs
     c) the fact that excessive copying is not done in order to 
type-cast from one array to annother, this requires some "set-up" overhead

My understanding is that most of the "slow-downs" reported for small 
arrays can be attributed to ufuncs, but there will be slower paths 
through the C-code for other cases as well because of the increased 
flexibility.

Our goal is to be as fast as we can be so give it a spin and tell us how 
to improve...

Thanks,

-Travis



From steve at holdenweb.com  Tue Feb 21 23:29:30 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 21 Feb 2006 23:29:30 -0500
Subject: May i customize basic operator (such as 1==3)?
In-Reply-To: <BAY108-F748E4BBD0226699564AA8CDFD0@phx.gbl>
References: <BAY108-F748E4BBD0226699564AA8CDFD0@phx.gbl>
Message-ID: <dtgpbb$asm$2@sea.gmane.org>

kanchy kang wrote:
> Hi,all
> as we know, we can override the operator of one object(for example __eq__).
> my question is, how to override the basic operator?
> for example,
> 
> for any object comparison operator(including litterals),
> for example,
> a = "123"
> b = "321"
> 
> the boolean equation a == b,
> i need override "==" operator like this:
> first display a and b
> 
> then return real boolean result (a == b).
> 
> thanks!

This isn't going to be possible without modifying the Python 
interpreter, as the operators are implemented as methods of objects, and 
the built-in objects are programmed in C and not in Python.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From erwin+usenet at andreasen.org  Fri Feb 24 09:51:33 2006
From: erwin+usenet at andreasen.org (Erwin S. Andreasen)
Date: Fri, 24 Feb 2006 14:51:33 +0000
Subject: Pickling/unpickling Cookie.SimpleCookie fails with protocol=2
References: <87acchv6cr.fsf@andreasen.org>
Message-ID: <874q2oq07e.fsf@andreasen.org>

"Erwin S. Andreasen" <erwin+usenet at andreasen.org> writes:

> Pickling a Cookie.SimpleCookie (or SmartCookie) when using protocol=2
> seems to do something very strange. Protocol 0/1 work fine:

Oh well, it seems that it's a well-known bug that has been around for
more than 2 years:

http://sourceforge.net/tracker/index.php?func=detail&aid=826897&group_id=5470&atid=105470

http://sourceforge.net/tracker/index.php?func=detail&aid=964868&group_id=5470&atid=105470

-- 
===============================================================
<erwin+usenet at andreasen.org>                        London, E14
<URL:http://www.andreasen.org/>                             <*>   
===============================================================



From steve at hastings.org  Thu Feb 23 03:53:40 2006
From: steve at hastings.org (Steve R. Hastings)
Date: Thu, 23 Feb 2006 00:53:40 -0800
Subject: PyAtom, a Python module for creating Atom syndication feeds
Message-ID: <pan.2006.02.23.08.53.39.65246@hastings.org>

Hello.  I have written a module called PyAtom.  It is designed to make it
really easy to create an Atom syndication feed.

Atom is a format similar to RSS, but with some additional features.

http://atomenabled.org/developers/syndication/


>From my Google searches, I think the name "PyAtom" is available, so I have
been calling my module by that name.  If this is a bad name, please let me
know, and I'll change it.

I intend to donate this to the Python Software Foundation, so I have
released it under the terms of the Academic Free License 2.1.

You can download it from here:

http://www.blarg.net/~steveha/pyatom.tar.gz


The file includes a readme.txt file with a few notes, and pyatom.py.

I had a great time writing this.  Please let me know what you think of it.
Comment here in comp.lang.python, or send email to me.  I have created a
special email address just for PyAtom questions and comments:

pyatom at langri.com


P.S. Should I publish this to the Cheese Shop?

http://cheeseshop.python.org/

-- 
Steve R. Hastings    "Vita est"
steve at hastings.org    http://www.blarg.net/~steveha



From steve at REMOVETHIScyber.com.au  Sun Feb 26 17:21:43 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Mon, 27 Feb 2006 09:21:43 +1100
Subject: Use of __slots__
References: <mailman.2455.1140991328.27775.python-list@python.org>
Message-ID: <pan.2006.02.26.22.21.43.28376@REMOVETHIScyber.com.au>

On Sun, 26 Feb 2006 17:01:45 -0500, Don Taylor wrote:

> Hi:
> 
> I am puzzled about the following piece of code which attempts to create 
> a class that can be used as record or struct with a limited set of 
> allowed attributes that can be set into an instance of the class.
> 
> class RecordClass(object):
>      __slots__ = ["foo"]

You define a RecordClass with a single slot, "foo".

[snip]

> I don't understand why I cannot set an attribute 'age' into record1.

Because you defined the class with only a slot for "foo", not "age".

Re-defining the __slots__ attribute at runtime does not add or subtract
slots from the class. It just breaks your class.

If you want to add and delete arbitrary attributes at runtime, don't use
slots.


-- 
Steven.



From fredrik at pythonware.com  Mon Feb 13 16:08:36 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Feb 2006 22:08:36 +0100
Subject: cyclic data structures
References: <Nc6If.1604$No6.38177@news.tufts.edu><mailman.1858.1139863851.27775.python-list@python.org>
	<fu6If.1607$No6.37915@news.tufts.edu>
Message-ID: <dsqsgl$2vc$1@sea.gmane.org>

John Salerno wrote:

> L.append(L) basically creates this, I think:
>
> [1, 2, L]
>
> Now, assuming that's correct, and since L points to the list [1, 2]

L points to [1, 2, L]

</F>





From tjreedy at udel.edu  Sun Feb 19 00:33:31 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 19 Feb 2006 00:33:31 -0500
Subject: aborting without killing the python interpreter
References: <1140320926.993703.90380@o13g2000cwo.googlegroups.com>
Message-ID: <dt8vvc$2vq$1@sea.gmane.org>


"Russ" <uymqlp502 at sneakemail.com> wrote in message 
news:1140320926.993703.90380 at o13g2000cwo.googlegroups.com...
>I wrote a simple little function for exiting with an error message:
>
> def error ( message ): print_stack(); exit ("\nERROR: " + message +
> "\n")
>
> It works fine for executing as a script,

How?  In the standard interpreter, 'exit' is bound to the string
'Use Ctrl-Z plus Return to exit.'
so trying to call it as a function fails.

 but when I run it
> interactively in the python interpreter it kills the interpreter.
> That's not what I want. Is there a simple way to have a script
> terminate but not have it kill the python interpreter when I run it
> interactively? I suspect I may need to use exceptions, but I'm hoping
> not to need them. Thanks.

The interactive interpreter runs a statement at a time and gives a prompt 
after any output.  From a command shell, you can use a flag (-i I think) to 
enter interactive mode after the script end.

Terry Jan Reedy





From felipe.lessa at gmail.com  Sat Feb 18 18:02:13 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sat, 18 Feb 2006 21:02:13 -0200
Subject: define loop statement?
In-Reply-To: <T4LJf.14256$915.10437@southeast.rr.com>
References: <lW4Jf.31559$3V4.8390@trnddc06>
	<T4LJf.14256$915.10437@southeast.rr.com>
Message-ID: <1140303733.6554.1.camel@kenshin>

Em S?b, 2006-02-18 ?s 20:04 +0000, Jeffrey Schwab escreveu:
> if __name__ == '__main__':
> 	loop = Loop(10)
> 	while loop:
> 		print "OK"

Maybe:

while Loop(10)():
	print "OK"

Looks rather ugly but requires one less line ;-).

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From bearophileHUGS at lycos.com  Sun Feb 26 14:19:37 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 26 Feb 2006 11:19:37 -0800
Subject: An isalpha() that accepts underscores as well
In-Reply-To: <mailman.2449.1140979860.27775.python-list@python.org>
References: <1140875695.053987.158710@t39g2000cwt.googlegroups.com>
	<cone.1140889811.930498.40672.5001@35st-server.simplicato.com>
	<mailman.2449.1140979860.27775.python-list@python.org>
Message-ID: <1140981577.906199.302100@v46g2000cwv.googlegroups.com>

This is probably faster:

def alfa_(w):
    return w.replace("_", "a").isalpha()


This is another solution, but it's probably slower, you can time it:

from string import letters
_setalpha = set(letters + "_")

def alfa_2(w):
    return not (set(w) - _setalpha)

Bye,
bearophile



From peter at engcorp.com  Mon Feb 13 20:06:16 2006
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 13 Feb 2006 20:06:16 -0500
Subject: FOLLOW-UP how to use RotatingFileHandler
In-Reply-To: <20060213213355.95996.qmail@web36709.mail.mud.yahoo.com>
References: <20060213212722.92234.qmail@web36701.mail.mud.yahoo.com>
	<20060213213355.95996.qmail@web36709.mail.mud.yahoo.com>
Message-ID: <dsraef$glh$2@sea.gmane.org>

john peter wrote:
> the fix was to specify handler.RotatingFileHandler
>  
> does RotatingFileHandler work with Windows XP?

Yes.



From jaywgraves at gmail.com  Tue Feb 14 14:40:01 2006
From: jaywgraves at gmail.com (jay graves)
Date: 14 Feb 2006 11:40:01 -0800
Subject: using an existing DLL file without having access to the source
	code?
References: <mailman.1914.1139944854.27775.python-list@python.org>
Message-ID: <1139946001.788723.174620@z14g2000cwz.googlegroups.com>

Dieter Vanderelst wrote:
> Could anybody tell me whether there are ways to use an existing DLL file
> in Python without having access to the source code?

Try ctypes.
http://starship.python.net/crew/theller/ctypes/

> I'm trying to find a way to use the image filters available in the
> Filters-project (http://filters.sourceforge.net/) without having to
> compile or build the DLL myself, which is according to the authors very
> hard.

I don't have any experience with this specific library but I've used
ctypes in the past and it worked great.

HTH.
...
jay graves



From johnjsal at NOSPAMgmail.com  Thu Feb 16 22:55:12 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 16 Feb 2006 22:55:12 -0500
Subject: embedding python in HTML
In-Reply-To: <43f4f98e$0$16930$636a55ce@news.free.fr>
References: <GD5Jf.1637$No6.38292@news.tufts.edu>
	<t6q9v1p2qcr0ntsau8i6q5glk89pfb4epq@4ax.com>
	<8n6Jf.1640$No6.38203@news.tufts.edu>
	<43f4f98e$0$16930$636a55ce@news.free.fr>
Message-ID: <bpCdne1jK5jC1GjeRVn-gw@rcn.net>

bruno at modulix wrote:

> You've got to understand that Python is *not* a 'ServerPage' language
> (-> php, asp, jsp etc) in itself. Your server can now run python, fine,
> but *how* ? CGI ? FastCGI ? mod_python ? other ? (hint: it's probably
> just plain old CGI...)

So does that mean I need to have something further on the server? Or is 
this something I can do on my end? How do I find out what I need?


From LittlePython at lost.com  Tue Feb 14 19:01:03 2006
From: LittlePython at lost.com (LittlePython)
Date: Wed, 15 Feb 2006 00:01:03 GMT
Subject: Python equivilant to msgbox()
References: <7CQHf.2690$7C3.1780@trnddc08> <43efd40a$1_2@newspeer2.tds.net>
	<6WQHf.2700$7C3.2665@trnddc08>
	<dsq6oc$lb8$1@newsreader3.netcologne.de>
Message-ID: <3buIf.32386$lo3.16580@trnddc07>

I am no VB programmer just dabble in vbscripting abit. The only one I am
aware of is the popup as self closing. I never thought of using com.

Do you know of any thing for a busy box in the same vain as easygui


"Claudio Grondi" <claudio.grondi at freenet.de> wrote in message
news:dsq6oc$lb8$1 at newsreader3.netcologne.de...
> LittlePython wrote:
> > That is exactly what I was look for .. thx
> Surprised to hear that.
>
> As VisualBasic programmer I would expect you to have experience with
> ActiveX on Windows, where the best way to go with Python is to reuse all
> the ActiveX components and their known user interfaces (i.e. constants
> to use as parameter and constants for interpretation of return values)
> directly from within Python.
>
> A message box goes e.g. this way:
>
>  >>> import win32com.client
>  >>> axWshShell = win32com.client.Dispatch("WScript.Shell")
>  >>> axWshShell.Popup(u"(MsgText)This axWshShell.Popup closes itself
> after 45 seconds", 45, u"(MsgTitle)Testing WScript.Shell object:", 1)
>
> By the way: is there a ready for direct use timed self closing Ok/Cancel
> message box in any of the proposed GUI packages?
>
> Claudio
> >
> >
> > "Kent Johnson" <kent at kentsjohnson.com> wrote in message
> > news:43efd40a$1_2 at newspeer2.tds.net...
> >
> >>LittlePython wrote:
> >>
> >>>Is there an equivalent to a msgbox() or wscript.echo (via wcsript) . I
> >>>would like to call this instead of print (to the screen) . I would like
> >>>to write a simple script that is not an event drive gui but calls input
> >>>boxes, message boxes, or maybe even a file open browser box as well?
> >>
> >>Take a look at EasyGUI:
> >>http://www.ferg.org/easygui/
> >>
> >>Kent
> >
> >
> >




From timothy.williams at nvl.army.mil  Thu Feb 23 12:39:54 2006
From: timothy.williams at nvl.army.mil (timothy.williams at nvl.army.mil)
Date: 23 Feb 2006 09:39:54 -0800
Subject: MySQLdb slow on MySQL 5
Message-ID: <1140716394.225560.27920@t39g2000cwt.googlegroups.com>

Hi.

I have a Python program that parses a file and inserts records into a
database with MySQLdb. I recently upgraded to MySQL 5.0.8, and now my
parser runs *really* slow. Writing out to CSV files is fine, but when I
try to insert the same records in a MySQL5 database, it slows to a
crawl. Using MySQL 4.1 seems fine. The data seems to be inserted
correctly, it's just really slow.

Has anyone else noticed a similar problem using MySQL5 and MySQLdb?

Thanks.



From ziade.tarek at gmail.com  Fri Feb 24 10:55:23 2006
From: ziade.tarek at gmail.com (=?ISO-8859-1?Q?Tarek_Ziad=E9?=)
Date: Fri, 24 Feb 2006 16:55:23 +0100
Subject: stop a doctest execution
Message-ID: <94bdd2610602240755x5c2d041fu711f3ea39a3b7719@mail.gmail.com>

Hello,

is there a simple way to stop a doctest execution within its code ?

my use case is to abort the execution of part of the doc, given an arbitrary
condition.
That could be: existence of a third party package or whatever.

Adding tests throughout the doctest does not look good.

Maybe it's time to implement the 'exit' builtin ?  ;)

Failed example:
     exit
 Expected nothing
 Got:
     'Use Ctrl-D (i.e. EOF) to exit.'


Tarek

--
Tarek Ziad? | Association AfPy | www.afpy.org
Site personnel | http://programmation-python.org
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From mac at calmar.ws  Sun Feb 19 07:24:42 2006
From: mac at calmar.ws (calmar)
Date: Sun, 19 Feb 2006 13:24:42 +0100
Subject: general coding issues - coding style...
References: <slrndve8oe.5jb.mac@news.calmar.ws>
	<1140305345.408445.49100@g43g2000cwa.googlegroups.com>
Message-ID: <slrndvgosa.t5c.mac@news.calmar.ws>

On 2006-02-18, plahey at alumni.caltech.edu <plahey at alumni.caltech.edu> wrote:

Hi,

> 1585 if sys.path[0][-12:] == "\library.zip":  #for py2exe
> if sys.path[0].endswith( "\\library.zip" ):

cool, thx,

> (did you really mean one back-slash there?)

(yeah, one backslash)

> 499     tuple = os.path.split(filename)
> bad variable name... tuple(x) converts a sequence to a tuple.

I see, I changed that to
path, filen = os.path.split(filename)

> You have a number of places where you check for len(x)==0:
> 674     if len(files) == 0:
> --> if not files:

I see. thx

> you should run your code through pychecker (it had a lot to say...).

I see, cool tool that pychecker!
I can't do something against the 'not used variable' so probably?
(since pygtk just sends those items anyway)

> You use global alot... that should be a red flag.  Like the poster
> above mentioned,  you have things that are telling you they want to
> be objects.

I will try to get some order (classes) and maybe remove them.

thanks a lot!!

cheers,
calmar

-- 
  calmar

          (o_  It rocks: LINUX + Command-Line-Interface
          //\
          V_/_                     http://www.calmar.ws


From rabkin at mweb[DOT]co[DOT]za  Wed Feb 22 15:02:06 2006
From: rabkin at mweb[DOT]co[DOT]za (Max)
Date: Wed, 22 Feb 2006 22:02:06 +0200
Subject: Little tool - but very big size... :-(
In-Reply-To: <quBKf.1339$A83.42251@twister1.libero.it>
References: <mailman.2211.1140513270.27775.python-list@python.org>
	<quBKf.1339$A83.42251@twister1.libero.it>
Message-ID: <ecCdnZ2f8MjdXmHenZ2dnUVZ_tSdnZ2d@is.co.za>

Giovanni Bajo wrote:
> There are also other choices that can be made. For instance, wxWidgets is
> *HUGE*.

Indeed. Remember Tkinter is built-in. (I never got the hang of Tkinter 
and prefer wx, but if size is important...)

--Max


From iansan at gmail.com  Fri Feb 17 17:28:19 2006
From: iansan at gmail.com (IamIan)
Date: 17 Feb 2006 14:28:19 -0800
Subject: Exiting os.spawnv's subroutine
Message-ID: <1140215299.383562.57250@g14g2000cwa.googlegroups.com>

I am using os.spawnv in Python 2.1 to do some geoprocessing in a
subroutine/process. Everything works great, except when the processing
is done the subroutine just waits for a couple minutes before closing
itself and returning to the main script. I have tried using sys.exit()
and exit() but these aren't doing anything.

What is the proper way to terminate this subroutine upon completion,
rather than waiting? Thank you.



From erwin+usenet at andreasen.org  Thu Feb 23 21:27:32 2006
From: erwin+usenet at andreasen.org (Erwin S. Andreasen)
Date: Fri, 24 Feb 2006 02:27:32 +0000
Subject: Pickling/unpickling Cookie.SimpleCookie fails with protocol=2
Message-ID: <87acchv6cr.fsf@andreasen.org>


Pickling a Cookie.SimpleCookie (or SmartCookie) when using protocol=2
seems to do something very strange. Protocol 0/1 work fine:

$ python2.4
Python 2.4.2 (#2, Nov 20 2005, 17:04:48) 
[GCC 4.0.3 20051111 (prerelease) (Debian 4.0.2-4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.

>>> import cPickle, Cookie
>>> cPickle.loads(cPickle.dumps(Cookie.SimpleCookie('hi=there')))
<SimpleCookie: hi='there'>

Protocol 2 however:

>>> pickle.loads(pickle.dumps(Cookie.Cookie('hi=there'),2))
<SmartCookie: hi=<Morsel: hi='there'>>

>>>pickle.loads(pickle.dumps(Cookie.Cookie('hi=there'),2))['hi'].__dict__

{'coded_value':
'"ccopy_reg\\012_reconstructor\\012p1\\012(cCookie\\012Morsel\\012p2\\012c__builtin__\\012dict\\012p3\\012(dp4\\012S\'comment\'\\012p5\\012S\'\'\\012sS\'domain\'\\012p6\\012S\'\'\\012sS\'version\'\\012p7\\012S\'\'\\012sS\'secure\'\\012p8\\012S\'\'\\012sS\'path\'\\012p9\\012S\'\'\\012sS\'expires\'\\012p10\\012S\'\'\\012sS\'max-age\'\\012p11\\012S\'\'\\012stRp12\\012(dp13\\012S\'coded_value\'\\012p14\\012S\'there\'\\012p15\\012sS\'value\'\\012p16\\012g15\\012sS\'key\'\\012p17\\012S\'hi\'\\012p18\\012sb."',
'value': <Morsel: hi='there'>, 'key': 'hi'}


I can't really say what goes wrong here, but it looks like a bug to me
-- comments? I guess I'll have to go to protocol 0 for this, or not
serialize the cookie but re-parse it on the other side (this pickle
gets passed down a UNIX socket together with the file descriptor of a
request, in a load balancing system).



-- 
===============================================================
<erwin at andreasen.org>                               London, E14
<URL:http://www.andreasen.org/>                             <*>   
===============================================================



From leknarf at pacbell.net  Wed Feb  8 13:49:27 2006
From: leknarf at pacbell.net (Scott Frankel)
Date: Wed, 8 Feb 2006 10:49:27 -0800
Subject: email questions
In-Reply-To: <1139420846.28143.41.camel@dot.uniqsys.com>
References: <FDD3FDB3-EF9C-4F85-9599-37AF617DED18@pacbell.net>
	<1139420846.28143.41.camel@dot.uniqsys.com>
Message-ID: <DE414F3F-31D8-45E0-B87C-68812C8A616A@pacbell.net>


Seems I'm still having issues with syntax.

 From what I can tell from my mail client, my outgoing mail server  
name is either
	
	mail.<ispname>.net
or
	mail.<ispname>.net:<myUsername>@<myDomain>.com

The former yields the same socket error on connect() that I reported  
earlier.  The latter yields a "nonnumeric port" error upon  
instantiation.  Instantiating with the port number,

	s = smtplib.SMTP("mail.<ispname>.net:<myUsername>@<myDomain>.com",  
portNum)

yields the following error:

	socket.gaierror: (7, 'No address associated with nodename')


Suggestions?

Thanks again
Scott




On Feb 8, 2006, at 9:47 AM, Carsten Haese wrote:

> On Wed, 2006-02-08 at 12:34, Scott Frankel wrote:
>> I'm looking for a way to send a simple, plain text email message
>> using Python.  My initial attempts are failing with the following  
>> error:
>>
>> 	socket.error: (61, 'Connection refused')
>>
>> Does this imply that I do not have the machine's smtp server
>> running?
>
> Yes.
>
>>   (I don't; and I'd like to avoid setting it up.)
>
> You don't have to set up an smtp server to use smtplib. You should be
> able to use your ISP's outgoing mail server, as in
>
> s = smtplib.SMTP("<ISP's mail server name goes here>")
>
> HTH,
>
> Carsten.
>
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list



From robert.kern at gmail.com  Tue Feb 21 19:47:40 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 21 Feb 2006 18:47:40 -0600
Subject: deriving from float or int
In-Reply-To: <1140568359.992200.7680@o13g2000cwo.googlegroups.com>
References: <1140502954.660120.174160@g14g2000cwa.googlegroups.com>
	<1140568359.992200.7680@o13g2000cwo.googlegroups.com>
Message-ID: <dtgcbc$aep$1@sea.gmane.org>

gene tani wrote:
> Russ wrote:
> 
>>Does it ever make sense to derive a class from a basic type such as
>>float or int? Suppose, for example, that I want to create a class for
>>physical scalars with units. I thought about deriving from float, then
>>adding the units. I played around with it a bit, but it doesn't seem to
>>work very well. Am I missing something here? Thanks.
> 
> you could look at how sciPy does it:
> http://starship.python.net/~hinsen/ScientificPython/

ScientificPython != SciPy

ScientificPython's unit package does not subclass from floats since it tries to
be agnostic about the kind of value you can assign a unit to.

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From onurb at xiludom.gro  Mon Feb 20 03:53:22 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Mon, 20 Feb 2006 09:53:22 +0100
Subject: editor for Python on Linux
In-Reply-To: <lanhv1t0sp8endde3l2ritbm7qpn3n1fdc@4ax.com>
References: <dtai6e$23m$2@ariane.blic.net>
	<mailman.2134.1140381888.27775.python-list@python.org>
	<lanhv1t0sp8endde3l2ritbm7qpn3n1fdc@4ax.com>
Message-ID: <43f983a3$0$4777$636a55ce@news.free.fr>

Rene Pijlman wrote:
> Sriram Krishnan:
> 
>>Check out http://wiki.python.org/moin/PythonEditors.
> 
> 
> This page can't be taken seriously. vi is not listed.

Well, this prove that this page *is* to be taken seriously !-)


(Ren?, don't bother replying : this is a troll ;-)



-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From CronoCloud at mchsi.com  Mon Feb  6 11:14:20 2006
From: CronoCloud at mchsi.com (Ron Rogers Jr.)
Date: Mon, 06 Feb 2006 16:14:20 GMT
Subject: Learning Python
In-Reply-To: <1139159843.488988.279770@g43g2000cwa.googlegroups.com>
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
	<1139156577.897100.69140@g43g2000cwa.googlegroups.com>
	<mailman.1439.1139157505.27775.python-list@python.org>
	<1139158796.288778.244000@z14g2000cwz.googlegroups.com>
	<ds5c0n$cej$2@aphrodite.grec.isp.9tel.net>
	<1139159843.488988.279770@g43g2000cwa.googlegroups.com>
Message-ID: <wBKFf.757686$_o.692903@attbi_s71>

Byte wrote:
> Yes, sorry, didnt realise diffrence between int and input. Since i'm
> such an idiot at this, any links to sites for people who need an
> unessicerily gentle learning curve?
> 

I'm new to Python too, here's a few I've found useful:

http://www.greenteapress.com/thinkpython/

http://wiki.python.org/moin/BeginnersGuide/NonProgrammers

Python Programming for the Absolute Beginner by Michael Dawson. It is 
the book I'm using. It's different from other Python books in that it's 
examples/sample programs are games or game related.  The author uses a 
modified version of the LiveWires modules later in the book along side 
Pygame

http://www.amazon.com/gp/product/1598631128/002-1529099-9424031?v=glance&n=283155

(That's the second edtion, no reviews yet.)

http://www.amazon.com/gp/product/1592000738/002-1529099-9424031?v=glance&n=283155

(first edition with reviews)

LiveWires they've got materials to go with their modules.

http://www.livewires.org.uk/python/

You haven't mentioned using IDLE, the built in IDE, I have found it useful:

http://hkn.eecs.berkeley.edu/~dyoo/python/idle_intro/index.html

It might not be in your menus though, on my box it's at:

python2.4 /usr/local/lib/python2.4/idlelib/idle.py


CronoCloud (Ron Rogers Jr.)


From khemkaamit at gmail.com  Thu Feb  9 01:47:07 2006
From: khemkaamit at gmail.com (Amit Khemka)
Date: Thu, 9 Feb 2006 12:17:07 +0530
Subject: Unable to get PIL to load jpeg images
In-Reply-To: <8ba244fb0602081252r14fa14abs6b6698a14db09826@mail.gmail.com>
References: <1139263113.552140.114100@o13g2000cwo.googlegroups.com>
	<1139315319.654694.285330@g43g2000cwa.googlegroups.com>
	<dsa4rh$s9d$1@sea.gmane.org>
	<8ba244fb0602081252r14fa14abs6b6698a14db09826@mail.gmail.com>
Message-ID: <1360b7230602082247v8b781d2r5c813b1e9c79e6@mail.gmail.com>

This is because PIL, is not able to find the jpeg library .

1. Install jpeg-libs from sources: (http://www.ijg.org/files/jpegsrc.v6b.tar.gz)
2.0: "clean" the PIL build
2.1 In setup.py that comes with PIL, set the JPEG_ROOT to the jpeg-lib path
3.0 run setup.py

I hope that should help ..

cheers,
amit


On 2/9/06, Andrew Gwozdziewycz <apgwoz at gmail.com> wrote:
> On 2/7/06, Steve Holden <steve at holdenweb.com> wrote:
> > peter.mosley at talk21.com wrote:
> > > Someone out there must surely know - please!
> > >
> > > Peter
> > >
>
> Try building the PIL from scratch. It might give you some insight as
> to which library it exactly is looking for. I can remember when
> compiling the PIL on my mac having to create a symbolic link to
> libjpeg.so.6 or something. It was bizarre but worked fine afterwards.
>
> --
> Andrew Gwozdziewycz <apgwoz at gmail.com>
> http://ihadagreatview.org
> http://plasticandroid.org
> --
> http://mail.python.org/mailman/listinfo/python-list
>


--
----
Amit Khemka -- onyomo.com
Endless the world's turn, endless the sun's Spinning, Endless the quest;
I turn again, back to my own beginning, And here, find rest.


From mikeisgreat at gmail.com  Thu Feb  2 21:02:17 2006
From: mikeisgreat at gmail.com (mikeisgreat at gmail.com)
Date: 2 Feb 2006 18:02:17 -0800
Subject: learning python, using string help
In-Reply-To: <1138931241.386430.234550@f14g2000cwb.googlegroups.com>
References: <1138906062.727850.177960@g14g2000cwa.googlegroups.com>
	<fwsEf.24314$1%5.18129@tornado.texas.rr.com>
	<1138909296.301962.16230@z14g2000cwz.googlegroups.com>
	<Pine.LNX.4.62.0602022221500.8737@urchin.earth.li>
	<1138925622.456566.133860@g47g2000cwa.googlegroups.com>
	<1138931241.386430.234550@f14g2000cwb.googlegroups.com>
Message-ID: <1138932137.022318.164090@z14g2000cwz.googlegroups.com>

silly newbie mistake

your code runs fine on my openbsd box. ( I didnt uncomment the return
map(...) line

thanks for the awesome example!

--mike



From malvert at telenet.be  Sun Feb 12 14:37:46 2006
From: malvert at telenet.be (malv)
Date: 12 Feb 2006 11:37:46 -0800
Subject: Tracking down memory leaks?
References: <1139749861.949765.282310@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.14.27.02.369270@REMOVETHIScyber.com.au>
Message-ID: <1139773066.603128.255400@g44g2000cwa.googlegroups.com>

Hi Steven,

Is there any way for making Python return memory no longer needed to
the OS? Cases may arise where you indeed need a big memory block
temporarily without being able to split it up into smaller chunks.
Thank you.
malv

Steven D'Aprano wrote:

> Objects return memory to Python when they are garbage collected, but not
> the OS.



From petr at tpc.cz  Fri Feb 24 11:20:28 2006
From: petr at tpc.cz (Petr Jakes)
Date: 24 Feb 2006 08:20:28 -0800
Subject: pyserial
In-Reply-To: <1140792240.745796.61410@p10g2000cwp.googlegroups.com>
References: <1140702690.396244.142370@g43g2000cwa.googlegroups.com>
	<1140745447.632878.286140@p10g2000cwp.googlegroups.com>
	<1140792240.745796.61410@p10g2000cwp.googlegroups.com>
Message-ID: <1140798028.203592.150380@j33g2000cwa.googlegroups.com>

I can recommend you to read pyserial documentation and look to the
examples. Browsing through this discussion group can help you a lot as
well.
Generally if the timeout is set to 0 (zero) the code will wait and wait
and wait till the data will arrive to the serial port (if there is not
data on the serial port, you can wait "forever" and you can think your
code is "frozen" :) )
Because of that, you can set the timeout, so after some time of waiting
for the data (when the data do not arrive) the code continues on the
next line.

Try to experiment a little bit with some simple and short code first,
so you will be able to understand how to communicate with the serial
port.
HTH
Petr Jakes



From plahey at alumni.caltech.edu  Fri Feb 17 14:41:18 2006
From: plahey at alumni.caltech.edu (plahey at alumni.caltech.edu)
Date: 17 Feb 2006 11:41:18 -0800
Subject: RSA in python
In-Reply-To: <mailman.2057.1140187795.27775.python-list@python.org>
References: <mailman.2057.1140187795.27775.python-list@python.org>
Message-ID: <1140205278.492979.248300@g47g2000cwa.googlegroups.com>

stupid question, but did you try:

rsa = M2Crypto.RSA.load_pub_key( file("pubkey.pem") )

It is not clear from the documentation what they want for "file" (and
because Python has no type declarations, you are left to guess...).

May not work... just thought I would ask.



From jzgoda at o2.usun.pl  Mon Feb 27 16:09:19 2006
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Mon, 27 Feb 2006 22:09:19 +0100
Subject: expat
In-Reply-To: <mailman.2488.1141073319.27775.python-list@python.org>
References: <mailman.2488.1141073319.27775.python-list@python.org>
Message-ID: <dtvpqk$f6e$1@atlantis.news.tpi.pl>

Katja Suess napisa?(a):

> may I have a hint what the problem is in my situation?
> Is it a syntax error in sweetone.odt or in xml.parsers.expat?
> Same problem with different file instead of sweetone.odt means that it's
> not the file that has a syntax error.
> xml.parsers.expat is a standard module that probably has no errors.
> So what could cause this error message??

Malformed XML document, perhaps. This may be anything, that expat
doesn't like (i.e. wrong encoding, cp1252 declared as latin-1, document
declared as utf-8 but with BOM, and so on).

-- 
Jarek Zgoda
http://jpa.berlios.de/


From solafidefarms at gmail.com  Tue Feb 28 14:20:05 2006
From: solafidefarms at gmail.com (SolaFide)
Date: 28 Feb 2006 11:20:05 -0800
Subject: Threading - will threads run in parallel?
Message-ID: <1141154405.709674.325760@t39g2000cwt.googlegroups.com>

I have 2 threads that I want to run at the same time: for instance:

from threading import Thread

class test(Thread):
         def run(self):
                  while True:
                          get(asdf)

class test2(Thread):
           def run(self):
                 while True:
                          get(jkl)
ack=test()
jkl=test2()
ack.start()
jkl.start()

(get() is a function which waits for a ping on a specific port, thus
stopping the program for a while.)

Will these run together, or do I have to find some other way of running
in parallel?

Also, is it possible to split off a program for the terminal that
started it? As in I type in python test.py and test.py runs in the
background and lets me do other things in that terminal?



From fredrik at pythonware.com  Mon Feb 13 14:36:00 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 13 Feb 2006 20:36:00 +0100
Subject: trapping errors in function call syntax
References: <m8m1v1h8ae545nsqbl777plviddc94vsdd@4ax.com><dsqmab$98v$1@sea.gmane.org>
	<8ba244fb0602131128g13c08973h72969ca0f307937f@mail.gmail.com>
Message-ID: <dsqn32$cf4$1@sea.gmane.org>

Andrew Gwozdziewycz wrote:

> While we're at it... Can someone point me to either an old post, or
> documentation about tuple expansion with * ? I recently saw it used
> and was shocked as i had no clue what it really did. I didn't know it
> could be used outside of function definitions.

the reference page is here:

    http://docs.python.org/ref/calls.html

</F>





From eric at qwhd746oihd49.net  Mon Feb  6 09:29:53 2006
From: eric at qwhd746oihd49.net (Matt Helm)
Date: Mon, 06 Feb 2006 08:29:53 -0600
Subject: win32com, BSTR, and null terminated strings
References: <mzh5xzyr.fsf@qwhd746oihd49.net> <lUadna9z9p16fnveUSdV9g@ptd.net>
Message-ID: <vevsimqm.fsf@qwhd746oihd49.net>


"John Bauman" <john at baumanfamily.com> writes:
> "Matt Helm" <eric at qwhd746oihd49.net> wrote in message 
> news:mzh5xzyr.fsf at qwhd746oihd49.net...
>> However, what is the proper way to recover the actual string? I have
>> been using:
>>
>>    r.split("\0", 1)[0]
>>
> I'd prefer to use
> r[:-1]
> to strip off the last character of the string. 

No good. The string could be "ABC" + \0 + 77 more chars of random memory.

Matt



From samrobertsmith at gmail.com  Mon Feb  6 06:33:11 2006
From: samrobertsmith at gmail.com (linda.s)
Date: Mon, 6 Feb 2006 03:33:11 -0800
Subject: Scientific Computing with NumPy
In-Reply-To: <ds7bvh$ab1$2@gemini.csx.cam.ac.uk>
References: <ds7bvh$ab1$2@gemini.csx.cam.ac.uk>
Message-ID: <1d987df30602060333n58de7937w9c4a2c203adc04c@mail.gmail.com>

On 2/6/06, mclaugb <mclaugb at nospm.yahoo.com> wrote:
> Has anyone recompiled the Scientific Computing package using NumPy instead
> of Numeric?
> I need a least squares algorithm and a Newton Rhaphson algorithm which is
> contained in Numeric but all the documentation out there says that Numeric
> is crap and all code should be using NumPy.
> Thanks,
> Bryan
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
what is the relationship between Numeric and Numpy?


From deets at nospam.web.de  Sat Feb 18 12:37:25 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 18 Feb 2006 18:37:25 +0100
Subject: [DICTIONARY] - Copy dictionary entries to attributes
In-Reply-To: <dt7kv6$dcn$1@usenet.otenet.gr>
References: <dt7kv6$dcn$1@usenet.otenet.gr>
Message-ID: <45p4akF7scp3U1@uni-berlin.de>

Ilias Lazaridis schrieb:
> remark: not sure if the term "dictionary" is correct here.
> 
> I have the following situation:
> 
> within a setup.cfg, settings are passed this way:
> 
> settings=project_page=theProjectPage.com
>         myVar=myValue
> 
> those are accessible later like this:
> 
> settings['project_page'] / settings['myValue']
> 
> -
> 
> Now my question: is there any standard function to map the settings 
> directly to attributes?
> 
> something like:
> 
> dictionary_make_attributes(settings)
> 
> thus they can be accessed via:
> 
> settings.project_page / settings.myVar
> 
> or
> 
> copy_dictionary_entries_to_attributes(vars, settings)
> 
> vars.project_page / vars.myVar


Either you use __getitem__, or the "bunch"-recipe:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52308

Diez



From roy at panix.com  Mon Feb 27 10:17:47 2006
From: roy at panix.com (Roy Smith)
Date: Mon, 27 Feb 2006 10:17:47 -0500
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>
	<4402AB7F.7070804@REMOVEMEcyber.com.au>
Message-ID: <roy-0A9E74.10174627022006@reader2.panix.com>

In article <4402AB7F.7070804 at REMOVEMEcyber.com.au>,
 Steven D'Aprano <steve at REMOVEMEcyber.com.au> wrote:

> But if you have a good usage case for an empty enum, 
> please feel free to tell us.

I could see empty enums being useful in machine-generated code, perhaps 
when generating wrappers around C library APIs.  There might be some reason 
to exclude certain values that exist in the C API from the Python wrapper.  
It's easier to just generate an empty enum than to notice that it's empty 
and do something else.

Yeah, I know this is not a very strong argument, but I also can't see any 
strong reason to outlaw empty enums either.  You can have empty tuples, 
lists, sets, and dictionaries.  If you count "pass", you can also have 
empty code blocks and classes.  Why not empty enums?  What harm does it do 
to allow them?


From fabio.pliger at gmail.com  Tue Feb 21 11:57:54 2006
From: fabio.pliger at gmail.com (Mr BigSmoke)
Date: 21 Feb 2006 08:57:54 -0800
Subject: Using CHACO and UNICODE
Message-ID: <1140541074.341977.266400@g14g2000cwa.googlegroups.com>

I'm using chaco in an application that draw some grafs and plot. I
really NEED to write unicode strings as a title (PlotTitle) and
labels(PlotLabels) i my axis. The problem is that chat (and it's
traits) only allow ascii strings... In the old version of chaco i
created a new myPlotLabel class, derived from PlotLabel that alowed me
to write unicode strings... but with the last version of Chaco i wasn't
able to do that yet!! Someone can help me? Please, it's really
important for me...

Thanks, FP



From joel.hedlund at gmail.com  Mon Feb  6 04:42:06 2006
From: joel.hedlund at gmail.com (Joel Hedlund)
Date: Mon, 06 Feb 2006 10:42:06 +0100
Subject: Best way of finding terminal width/height?
In-Reply-To: <11udc0r2bq11042@corp.supernews.com>
References: <96nFf.43896$d5.199922@newsb.telia.net>
	<11uc3dohfitotc5@corp.supernews.com>
	<jysFf.155352$dP1.513537@newsc.telia.net>
	<11udc0r2bq11042@corp.supernews.com>
Message-ID: <43E719EE.3040401@gmail.com>

Thank you for a very quick, informative and concise response.

> BTW: don't forget to attach a handler to the window-size-change
> signal (SIGWINCH) so that you know when your terminal changes sizes

Do you mean something like this?

import signal, os
# terminal_info contains the example from my first post
from terminal_info import get_terminal_size

TERMINAL_SIZE = get_terminal_size()

def update_terminal_size(signum, frame):
    global TERMINAL_SIZE
    TERMINAL_SIZE = get_terminal_size()

signal.signal(signal.SIGWINCH, update_terminal_size)

while True:
    # Do lots of IO (fishing for exceptions...)
    open('/a/large/file').read()
    print TERMINAL_SIZE

The docs for the signal module (http://docs.python.org/lib/module-signal.html) say that 
"""
When a signal arrives during an I/O operation, it is possible that the I/O operation raises an exception after the signal handler returns. This is dependent on the underlying Unix system's semantics regarding interrupted system calls.

"""
So this is what I'm trying to provoke in the final while loop. In this case I get no exceptions (hooray!). However, if I replace open('/a/large/file').read() with raw_input() I get EOFError (no errmsg), and even worse, if I replace it with sys.stdin.read() or even print open('/a/large/file').read() I get IOError: [Errno 4] Interrupted system call.

I do lots of IO in my work, and primarily with gigantic text files (welcome to bioinformatics :-). Protecting my code from this sort of error (i believe) will be quite hard, and probably won't look pretty. Or am I missing something?

Note though that these realtime updates aren't essential to me at the moment. Basically all I need is to find out for each run how much space I have so I can text wrap command line help text (as in myprog --help) as user friendly as possible. 

I run Ubuntu 5.10 btw, but I try to stay as cross-platform as I can. My priorities are Ubuntu, other linuxes, other unixes, Win, Mac.

> Homey don't do Windows, so you'll have to ask somebody else that.

:-)

> I don't know what you mean by "leverage the termios module".
>
>>I have a hunch that we have 100% overlap there,
> 
> No comprende.

I mean: I believe that for those environments where $COLS and $ROWS are set
then python will probably have access to the termios module as well, and for those environments that don't have $COLS and $ROWS set then python probably will not have access to the termios module either. So, in the latter case I'm back to square one, which is arbitrary guesswork.

>  1) Just write a normal Unix-like text processing "filter". 

Yes that's what I normally do. But I also like to hook them up with a --help option that shows usage and options and such, and I like that warm fuzzy feeling you get from seeing really readable user friendly help... :-)

> I would guess that the real answer is that so few people have
> ever wanted it that nobody has ever created a module and
> submitted it.  Feel free...  ;) 

I just might. I've got some stuff that people may benefit from (or possibly hate, I don't know ;-). If I ever sum up the courage to publish it, would it be a good idea to post the modules to python-dev at python.org, or is there some better route?

Thanks again for your time!
/Joel


From enleverlesX.XmcX at XmclaveauX.com  Wed Feb  1 09:07:52 2006
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI)
Date: Wed, 1 Feb 2006 15:07:52 +0100
Subject: Rur-ple lessons 0.36
References: <1138578056.564555.283470@o13g2000cwo.googlegroups.com>
Message-ID: <43e0c0ce$0$20180$8fcfb975@news.wanadoo.fr>

Bonjour !

Il me semblerait sympathique que cette annonce soit dupliqu?e sur 
fr.comp.lang.python, et sur quelques autres newsgroups.
Par exemple, puis-je r?percuter l'annonce sur le newsgroup 
"programmation.python" de zoo-logique ?

@-salutations
-- 
Michel Claveau




From fredrik at pythonware.com  Mon Feb  6 06:18:52 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 6 Feb 2006 12:18:52 +0100
Subject: Python V2.4.2 source code
References: <43e710de$0$23286$db0fefd9@news.zen.co.uk><mailman.1471.1139217340.27775.python-list@python.org>
	<43e72b68$0$29572$da0feed9@news.zen.co.uk>
Message-ID: <ds7bat$48k$1@sea.gmane.org>

John Dean wrote:

> That particular file doesn't include the implementation files for the core
> modules. The platform specific directories only include two or three files.
> Only the Mac directory contains any C code files

$ date -u
Mon Feb  6 11:14:15 UTC 2006
$ wget http://www.python.org/ftp/python/2.4.2/Python-2.4.2.tgz
...
Resolving www.python.org... done.
Connecting to www.python.org[82.94.237.218]:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 9,239,975 [application/x-tar]
...
12:14:42 (477.76 KB/s) - `Python-2.4.2.tgz' saved [9239975/9239975]

$ tar tvfz Python-2.4.2.tgz | grep .c$ | wc
    321    1926   28606
$ tar tvfz Python-2.4.2.tgz | grep .c$ | more
-rw-r--r-- anthony/anthony  1591 2001-11-17 07:30:20 Python-2.4.2/Demo/embed/demo.c
-rw-r--r-- anthony/anthony   255 2001-02-20 21:54:28 Python-2.4.2/Demo/embed/importexc.c
...
-rw-r--r-- anthony/anthony  43071 2003-11-20 14:30:55 Python-2.4.2/Mac/Modules/ae/_AEmodule.c
-rw-r--r-- anthony/anthony   3680 2003-11-20 14:30:55 Python-2.4.2/Mac/Modules/ah/_AHmodule.c
...
-rw-r--r-- anthony/anthony   5531 2004-08-02 15:24:54 Python-2.4.2/Modules/_bisectmodule.c
-rw-r--r-- anthony/anthony 142654 2004-12-16 10:48:37 Python-2.4.2/Modules/_bsddb.c
...
-rw-r--r-- anthony/anthony  47941 2005-08-21 13:09:58 Python-2.4.2/Objects/abstract.c
-rw-r--r-- anthony/anthony   4895 2003-04-19 20:15:10 Python-2.4.2/Objects/boolobject.c
...
-rw-r--r-- anthony/anthony    447 2004-09-08 17:56:39 Python-2.4.2/PC/WinMain.c
-rw-r--r-- anthony/anthony  13393 2004-11-07 15:30:34 Python-2.4.2/PC/_subprocess.c
...
-rw-r--r-- anthony/anthony    815 2001-07-26 15:41:06 Python-2.4.2/Python/atof.c
-rw-r--r-- anthony/anthony  59696 2005-09-15 12:46:18 Python-2.4.2/Python/bltinmodule.c
... (etc)

sounds like your gzip/tar utilities are broken.

</F>





From hancock at anansispaceworks.com  Fri Feb  3 01:06:32 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Fri, 3 Feb 2006 00:06:32 -0600
Subject: Another try at Python's selfishness
In-Reply-To: <GrGdnYYzsbcBLH_eRVn-iQ@comcast.com>
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<GrGdnYYzsbcBLH_eRVn-iQ@comcast.com>
Message-ID: <20060203000632.61a50799@samwise.anansi>

On Thu, 02 Feb 2006 19:27:55 -0600
DH <no at spam.com> wrote:
> But I think most people who don't like the extraneous
> 'self' in python  just consider it a minor inconvenience
> and don't even notice it after  using python for a while. 

After messing around with Javascript (many magical
variables that suddenly show up in your namespaces!), I
began to *seriously* appreciate Python's design.  Having
self as an explicit parameter is beautiful self-documenting
design.

The convention that the self parameter is always "self" with
4 characters instead of, say, __ or _ or s can get annoying,
but of course, you are actually free to break this
convention.  The advantage to keeping it, of course, is that
anybody can google "python self" and immediately get an
explanation of what it is, whereas googling for "python _"
is less likely to be helpful.

In fact, I think this ease of finding documentation is one
of the reasons why Python's heavy use of keywords (rather
than symbolic operators) is so useful. Recent additions like
"list comprehensions" and "generators" create a lot of
newbie confusion not least because newbies simply don't know
that [x for x in mylist] is *called* a "list comprehension"
(if they knew what it was called, they'd answer the question
for themselves).

They see the code and don't have any idea what it is. It
adds to the basic or core knowledge that you have to wade
through before you can say you "know Python" even at the
trivial level.

One of the things that attracted me to Python (at v1.5.2)
was the fact that the core language was so small and simple
that I could learn it in just a few days. The more
syntactical sugar added, the less that will be true, though.

I don't think we've busted the system yet, but I think
there's some reason for caution against making things any
*more* complicated. I still see "newbie-friendliness" as a
MAJOR plus for Python -- it increases the chance that users
of your software will become contributors.

I mean, even Perl was probably pretty simple in the
beginning. ;-)

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From trepca at gmail.com  Sun Feb  5 12:34:30 2006
From: trepca at gmail.com (Sebastjan Trepca)
Date: Sun, 5 Feb 2006 18:34:30 +0100
Subject: How to create a unix shell account with Python?
Message-ID: <cd329af80602050934j639785a5u98b47f9358a13e79@mail.gmail.com>

Hi!

I couldn't find anything on creating a new linux user account in
Python documentation.
Anyone has any experience with this? You just run useradd command in
shell or is there a more pythonic way?

Thanks, Sebastjan


From lycka at carmen.se  Fri Feb 24 12:21:59 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 24 Feb 2006 18:21:59 +0100
Subject: Using ElementTree to tidy up an XML string to my liking
In-Reply-To: <1140781410.982716.316410@p10g2000cwp.googlegroups.com>
References: <1140716245.381730.285310@j33g2000cwa.googlegroups.com>
	<1140767274.159129.268640@i39g2000cwa.googlegroups.com>
	<1140781410.982716.316410@p10g2000cwp.googlegroups.com>
Message-ID: <dtnfbp$7i8$1@wake.carmen.se>

peterbe at gmail.com wrote:
> Yes I am but, I'm using a DOM Serializer in Firefox which for some
> reason turns myCamelNames into MYCAMELNAMES for the nodenames. I'll
> therefore need to control the case-spelling of these things as I'm
> formatting the XML string.

I realize that it's difficult to make sure that every user of your
system has a corrected Firefox, but it seems to me that there is
a bug in that DOM Serializer, and that it would be good to mend
that.

Concerning element names, it's your coice of course, but I agree
more and more with Guido and PEP008 that camelCase is ugly. (Not
that ALLCAPS is better...)


From no at spam.com  Tue Feb 14 09:05:17 2006
From: no at spam.com (DH)
Date: Tue, 14 Feb 2006 08:05:17 -0600
Subject: Pythonic gui format?
In-Reply-To: <43f19d88$0$4761$636a55ce@news.free.fr>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<43f11990$0$667$626a54ce@news.free.fr>
	<a9KdnTPXHOGOr2zenZ2dnUVZ_vidnZ2d@comcast.com>
	<43f19d88$0$4761$636a55ce@news.free.fr>
Message-ID: <HrKdnTDaI9YCfmzeRVn-pg@comcast.com>

bruno at modulix wrote:
> DH wrote:
>> Bruno Desthuilliers wrote:
>>
>>>> I am currently seeking for pythonic alternative for XML. 
>>>
>>> A pretty obvious one is dicts and lists. What about (Q&D):
>>
>> That's like JSON: http://www.json.org/example.html
> 
> No, it's pure Python. It happens that JSON looks pretty close to Python,
> but that's another point.

Python dict and lists ARE JSON.  The only difference that python can't
handle is multiline comments.


From DustanGroups at gmail.com  Sun Feb  5 12:49:31 2006
From: DustanGroups at gmail.com (Dustan)
Date: 5 Feb 2006 09:49:31 -0800
Subject: Get System Date?
Message-ID: <1139161771.537069.181010@g44g2000cwa.googlegroups.com>

Is it possible to get the system date on a Windows XP machine? Most
Convenient would to retrieve YYYY, MM, and DD as seperate variables.

When I say system date, I'm thinking of the small clock in the
lower-right hand corner, which has date as well as time, but if there's
another clock that Python supports, it works for me as long as it's
somewhat accurate.



From miller_ralph at sbcglobal.net  Wed Feb 15 17:34:58 2006
From: miller_ralph at sbcglobal.net (Ralph Miller)
Date: Wed, 15 Feb 2006 16:34:58 -0600
Subject: ANN:  PyIE - Python Inference Engine
Message-ID: <43F3AC92.5010006@sbcglobal.net>


	PyIE, Python Inference Engine, is now available at "DFWPython.org", 
under "Our Source Repository", thanks to Jeff Rush. The current revision 
is 0.9.10.

What's PyIE ?
-------------

	PyIE is an hypothesis based, agenda driven, object oriented inference 
engine written in Python. Inferencing modes include back chaining, 
opportunistic forward chaining and explicit forward chaining. The object 
base supports classes, first-class objects and multiple, dynamic 
inheritance. PyIE uses a TMS (truth maintenance system) for 
non-monotonic reasoning. All objects are first class objects and all 
values are slot values, i.e. data members attached to some object. The 
GUI uses TKinter and consists of a main control panel and seven editors 
for the agenda, classes, objects, slots, rules, methods and commands.

	The knowledge base file types are currently XML and an older 
Python-like text format. A version is associated with all .py files and 
when the KBs are saved, this current version number is saved within the 
knowledge base source files. Only the XML format supports methods and is 
the default file type.

	Knowledge is usually, but not always, expressed in rules and the 
sequencing of the inferencing is controlled by a structure called an 
agenda. The current truth-values of each clause and each rule are kept 
in an hypothesis. Rules typically contain the main expression of 
knowledge and experience. Every rule must be associated with a hypo. 
Every rule has one or more antecedent clauses, usually termed the 'left 
hand side' (lhs). Rules may also have one or more consequent clauses; 
usually termed the 'right hand side' (rhs). In order to prove the 
associated hypo true, a rule must prove all antecedent clauses true.

	A hypothesis is simply a truth-value, in PyIE one of four possible 
values: True, False, Not Known or Unknown. 'Unknown' indicates that the 
hypo has not been tested, while 'Not Known' specifies that the hypo has 
been tested but proven neither 'True' nor 'False'. The engine proves 
hypotheses taken from an agenda. The agenda is hypothesis driven, that 
is, only hypotheses are contained in the agenda, not rules. The engine 
selects the relevant hypothesis to be proved and follows a specific set 
of steps to prove the hypo. Firing rules is only one method for proving 
a hypothesis.

Download
--------

	The current PyIE may be exported from the subversion repository:
https://python.taupro.com/repo/Projects/PyIE/trunk

	Compressed gzip and zip files will be available from time to time from:
https://python.taupro.com/repo/Projects/PyIE/downloads


External Dependencies
---------------------

	PyIE relies on Python 2.3 and later and also TKinter. No other modules 
need be installed.

License
-------

	The license is MIT.

Caveats
-------

	This is a research project. The documenetation is woefully incomplete. 
'Eval' and 'compile' are used in the "KBsXML.py" module to process rules 
and methods. The underlying assumption is that there will be no 
malicious use.

Author
------

	Ralph S. Miller
	miller_ralph at sbcglobal.net


Regards,
Ralph




From mrstephengross at hotmail.com  Wed Feb 15 12:17:39 2006
From: mrstephengross at hotmail.com (mrstephengross)
Date: 15 Feb 2006 09:17:39 -0800
Subject: Embedding a binary file in a python script
References: <1140021879.698353.324230@o13g2000cwo.googlegroups.com>
	<mailman.1961.1140022989.27775.python-list@python.org>
	<1140023232.099718.264330@g14g2000cwa.googlegroups.com>
	<abo6v1lpe1m2csjv0vu0k4mvtmg41oj9tm@4ax.com>
Message-ID: <1140023859.115270.215800@g43g2000cwa.googlegroups.com>

Good point.... I appreciate all the help, and apologize if I came
across badly. I'm definitely willing to put in the work to understand
all this, it's just that it's a lot of new modules for me and I'm a bit
overwhelmed. Sorry if I seemed impatient...



From __peter__ at web.de  Mon Feb 20 07:41:34 2006
From: __peter__ at web.de (Peter Otten)
Date: Mon, 20 Feb 2006 13:41:34 +0100
Subject: Quesion about the proper use of __slots__
References: <1140424508.393412.79140@o13g2000cwo.googlegroups.com>
	<43f9825e$0$4777$636a55ce@news.free.fr>
	<1140426860.033363.237150@o13g2000cwo.googlegroups.com>
	<dtc219$h0a$01$1@news.t-online.com>
	<1140428016.170547.315710@g47g2000cwa.googlegroups.com>
	<1140432487.272405.297100@f14g2000cwb.googlegroups.com>
	<1140434225.164304.230440@z14g2000cwz.googlegroups.com>
	<dtca02$pn3$03$2@news.t-online.com>
	<1140438776.231178.205500@g43g2000cwa.googlegroups.com>
Message-ID: <dtcdaf$77h$00$1@news.t-online.com>

bonono at gmail.com wrote:

> 
> Peter Otten wrote:
>> > He could be working on a machine with < 1M RAM or some other
>> > constraints.
>>
>> I have 256K, by the way.
>>
> Impressive, curious to know what kind of environment it is as it has
> been a long time I have seen such limited spec. My first x86(IBM PC)
> had more than that.

Touch?


From onurb at xiludom.gro  Tue Feb 14 09:28:13 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Tue, 14 Feb 2006 15:28:13 +0100
Subject: Pythonic gui format?
In-Reply-To: <1139923105.939191.200660@z14g2000cwz.googlegroups.com>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<43f11990$0$667$626a54ce@news.free.fr>
	<1139923105.939191.200660@z14g2000cwz.googlegroups.com>
Message-ID: <43f1e919$0$649$636a55ce@news.free.fr>

Gregory Petrosyan wrote:
>>>Isn't it ugly a bit?
>>
>>I'd even say 'ugly 16-bits' !-)
> 
> 
> You are right of course. Those  "examples"  are really bad, and, most
> of all, really un-pythonic.
> 
> Thanks for JSON. It's more clean&simple than XML, but my main idea is
> to remove any extra layer between Python and GUI. I want all GUI
> elements/data to be directly accessible from Python (without extra
> libraries).
> Your dicts example is nice, but this  approach (and some others) lacks
> one important feature: ordering of GUI elements. In XML, the order of
> all elements is specified, and with dicts (or with very clean Georg's
> model) it is not. (BTW remember topics about ordered dicts...)

One possible (but somewhat ugly) solution is to use a list of tuples
instead of a dict:

d = {'k1': 'v1', 'k2': 'v2'}
=>
l = [('k1', 'v1'), ('k2', 'v2')]

where 'values' can of course be any Python data type...


Another solution is to include ordering infos in the dict, either as
1/an entry for each item or as 2/a separate entry:

1/
window = {
  "item" : {'k1': 'v1', 'k2': 'v2', 'order': XXX},
  "otheritem" : {'k1n': 'v1n', 'k2n': 'v2n', 'order': YYY},
}

2/
window = {
  "item" : {'k1': 'v1', 'k2': 'v2'},
  "otheritem" : {'k1n': 'v1n', 'k2n': 'v2n'},
  "order" : ['item', 'otheritem'],
}

NB : I'd rather choose the second solution...


And finally, you could write your own ordered mapping type - but then
you loose the builtin syntax...

My 2 (unordered) cents...
-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From mitsura at skynet.be  Tue Feb  7 03:36:32 2006
From: mitsura at skynet.be (mitsura at skynet.be)
Date: 7 Feb 2006 00:36:32 -0800
Subject: how to copy a Python object
Message-ID: <1139301392.205225.48690@o13g2000cwo.googlegroups.com>

Hi,

I am new to Python and OO programming.
I need to copy a Python object (of a class I made myself).
new_obj = old_object doesn't seem to work since apparently new_obj is
then a referrence to old_obj.

I found out that there is a module called 'copy' that allows you to do
a shallow or a deep copy.
I need a deep copy since my object contains dicts to other objects that
also need to be copied.

However, when I do new_object = copy.deepcopy(old_object) I get a
series of errors. The most important one:
"
TypeError: object.__new__(PySwigObject) is not safe, use
PySwigObject.__new__()
"

So any help much appreciated.

With kind regards,

Kris

I am using Python 2.4



From jjl at pobox.com  Sun Feb 12 18:55:15 2006
From: jjl at pobox.com (John J. Lee)
Date: Sun, 12 Feb 2006 23:55:15 GMT
Subject: Tracking down memory leaks?
References: <1139749861.949765.282310@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.14.27.02.369270@REMOVETHIScyber.com.au>
Message-ID: <87y80g5dzk.fsf@pobox.com>

Steven D'Aprano <steve at REMOVETHIScyber.com.au> writes:
> On Sun, 12 Feb 2006 05:11:02 -0800, MKoool wrote:
[...]
> I may be mistaken, and if so I will welcome the correction, but Python
> does not return memory to the operating system until it terminates.
> 
> Objects return memory to Python when they are garbage collected, but not
> the OS.
[...]

http://groups.google.com/group/comp.lang.python/browse_frm/thread/ce5c44915f43d6d/2bea1c569a65e13e


John


From apgwoz at gmail.com  Tue Feb  7 11:44:49 2006
From: apgwoz at gmail.com (Andrew Gwozdziewycz)
Date: Tue, 7 Feb 2006 11:44:49 -0500
Subject: Is Python good for web crawlers?
In-Reply-To: <1139330008.270988.227170@g44g2000cwa.googlegroups.com>
References: <1139330008.270988.227170@g44g2000cwa.googlegroups.com>
Message-ID: <8ba244fb0602070844i7ef9398s315ceb74920c478b@mail.gmail.com>

On 7 Feb 2006 08:33:28 -0800, Tempo <bradfordh at gmail.com> wrote:
> I was wondering if python is a good language to build a web crawler
> with? For example, to construct a program that will routinely search x
> amount of sites to check the availability of a product. Or to search
> for news articles containing the word 'XYZ'. These are just random
> ideas to try to explain my question a bit further. Well if you have an
> opinion about this please let me know becasue I am very interested to
> hear what you have to say. Thanks.
>

Google supplies a basic webcrawler as a google desktop plugin called
Kongulo (http://sourceforge.net/projects/goog-kongulo/) which is
written in python. I would think python would be perfect for this sort
of application. Your bottleneck is always going to be downloading the
page.

--
Andrew Gwozdziewycz <apgwoz at gmail.com>
http://ihadagreatview.org
http://plasticandroid.org


From hancock at anansispaceworks.com  Mon Feb  6 00:24:52 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Sun, 5 Feb 2006 23:24:52 -0600
Subject: Importing a class, please help...
In-Reply-To: <a1pFf.138$CO7.124@fe02.lga>
References: <a1pFf.138$CO7.124@fe02.lga>
Message-ID: <20060205232452.526b3875@samwise.anansi>

On Sun, 5 Feb 2006 10:41:51 -0500
"anon" <anon at nospam.nospam> wrote:
> Newbie to Python and I have a question please.  I am using
> Windows XP, SPE  0.8.2.a and Python24.  I have done this:
> 
> import sys
> print sys.path
> 
> no problem there, sys imports just fine.  I have a folder
> that I called  c\JavaProjects\PythonTesting and it shows
> up in the output from sys.path  above.  I have dropped a
> very simple Jar in that folder and I have attempted  to do
> an Import on it.  This is where things fail.  I cannot see
> the  contents of my Jar.  What am I missing here?

As others have pointed out, ".jar" is going to be Java
bytecode, and from that strange looking path (was, I assume
supposed to be "C:\JavaProjects\PythonTesting"), it looks
very much like you really wanted to be using Jython (a.k.a
"Java Python") rather than Python (a.k.a. "C Python").

Perhaps you have both Jython and Python 2.4 installed and
you are launching the latter when you meant the former?

In any case, C Python cannot load Java classes (that's the
main raison d'etre for Jython).

 -- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From aleaxit at yahoo.com  Thu Feb 16 23:10:48 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Thu, 16 Feb 2006 20:10:48 -0800
Subject: getting the line just before or after a pattern searched
References: <1140146668.313276.91380@g43g2000cwa.googlegroups.com>
Message-ID: <1havbuu.1bpca5o1d0fcsbN%aleaxit@yahoo.com>

<s99999999s2003 at yahoo.com> wrote:

> hi
> 
> i have a file something like this
> 
> abcdefgh
> ijklmnopq
> 12345678
> rstuvwxyz
> .....
> .....
> .....
> 12345678
> .....
> 
> whenever i search the file and reach 12345678, how do i get the line
> just above and below ( or more than 1 line above/below) the pattern
> 12345678 and save to variables? thanks

If the file's of reasonable size, read it all into memory into a list of
lines with a .readlines method call, then loop with an index over said
list and when you find your pattern at index i use i-1, i+1, and so on
(just check that the resulting i+N or i-N is >=0 and <len(thelist)).

If the file's too big to keep in memory at once, you need more clever
approaches -- keep a collections.deque of the last M lines read to be
able to get "N lines ago" for N<M, and for getting lines "after" the one
of interest (which you will read only in "future" iterations) keep track
of relative linenumbers that "will" interest you, decrement them with
each line read, trigger when they reach 0.  But unless you're dealing
with files of many, MANY hundres of megabytes, on any typical modern
machine you should be OK with the first, WAY simpler approach.


Alex


From kp8 at mac.com  Fri Feb 17 20:01:35 2006
From: kp8 at mac.com (kpp9c)
Date: 17 Feb 2006 17:01:35 -0800
Subject: Scientific Computing with NumPy
In-Reply-To: <mailman.1704.1139573734.27775.python-list@python.org>
References: <ds7bvh$ab1$2@gemini.csx.cam.ac.uk>
	<mailman.1482.1139225595.27775.python-list@python.org>
	<ds7ch4$bj7$1@gemini.csx.cam.ac.uk>
	<mailman.1704.1139573734.27775.python-list@python.org>
Message-ID: <1140224495.798167.248550@z14g2000cwz.googlegroups.com>

Numeric, Numarray, & Numpy... some one stick a screwdriver in my
forehead and end the madness that Numeric has become.

Brilliant programming & an almost essential part of scientific & math
hacking in python made maddeningly confusing by truly dumb naming
scheme.

For crying all night! Numpy was Numeric's nickname!!... choose a new,
related, but unique name!!!! Holy cow!!! How hard is that? A group of
folks smart enough to come up with such an amazing piece of software
can't do better than to avoid this unnecessary confusion?

only Apple could top naming as retarded as this.

with 2.3 seconds i came up with this:

Nappy

Numeric Array processing in Python

similar enough to suggest its origins, unique enough to not confuse the
heck out of everyone...

I am sure folks can do better, but really!

<wink>



From tzellman at gmail.com  Wed Feb 15 11:40:11 2006
From: tzellman at gmail.com (tzellman at gmail.com)
Date: 15 Feb 2006 08:40:11 -0800
Subject: kwargs keyword evaluation
Message-ID: <1140021611.026892.85790@f14g2000cwb.googlegroups.com>

Ok, so here is my situation:

Let's assume I have a function that makes good use of the kwargs
parameter. It requires that there is a certain "format" for the kwargs
keywords. (I am using Django, btw). The format is like such:
"SOMEVAL__exact", etc., where SOMEVAL is some value that it parses from
the keyword.

Now, I want to call this function, specifying the kwargs. The problem
is that I want to dynamically set the kwargs. For example, I don't want
to hard code in the name like such:
    function_call(name__exact="Tom")

I want to generate the keyword on the fly. So, I want to do this:
(assume someVar == 'name' for now)
keyword = someVar + "__exact"

The problem:
I need to know how to get it to use the VALUE of the keyword for the
keyword.


My thoughts:
(1) Maybe I can override the kwargs parameter by doing such:
function_call(kwargs={keyword:"Tom"})
*loud buzzer* Nope. (as expected)

(2) Maybe I can just pass it in:
function_call(keyword="Tom")
Nope! (as expected, it tries to use 'keyword' as the keyword)

What can I do?!?!?!?
I really don't want to have to hardcode a BUNCH of if statements.

Thanks in advance!



From wuwei23 at gmail.com  Thu Feb 16 20:11:01 2006
From: wuwei23 at gmail.com (alex23)
Date: 16 Feb 2006 17:11:01 -0800
Subject: Seaching Active Directory via ADO
References: <g_7Jf.33401$0H1.22606@trnddc04>
Message-ID: <1140138661.484502.86380@f14g2000cwb.googlegroups.com>

Heya,

There are a couple of examples on the O'Reilly site. These two are
taken from 'Active Directory Cookbook', the first uses a COM object
while the second uses a native LDAP module:

http://www.rallenhome.com/books/adcookbook/src/18.6-rootdse_python_com.py.txt
http://www.rallenhome.com/books/adcookbook/src/18.6-rootdse_python_ldap.py.txt

This might give you a start.

- alex23



From mac at calmar.ws  Mon Feb 20 08:46:39 2006
From: mac at calmar.ws (calmar)
Date: Mon, 20 Feb 2006 14:46:39 +0100
Subject: general coding issues - coding style...
References: <slrndve8oe.5jb.mac@news.calmar.ws>
	<43f8c846$0$11067$636a55ce@news.free.fr>
Message-ID: <slrndvji1v.1ar.mac@news.calmar.ws>

On 2006-02-19, Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote:

Bonjour,

>
> 1/ learn OO and get rid of globals.

Well I created two classes now. I put some things global (your point 6).
e.g. if it's on Windows or not, and other things.

> 2/ use dict or list based dispatch instead of long if/elif/elif... clauses

when I find out what you mean, I will. Probably something lika a 'case'
thing? #python meant a list containing functions or so. So that the
values represent the functions to call, isn 'it?

> 3/ stdout is meant for *normal* program outputs. Errors and verbosity go 
> to stderr

yeah, changed (somebit)

> 4/ triple quoted strings are fine for multiline text

yeah. I have lot of triple prints...

> 5/ os.path is fine for portable filepath operations

I don't really understant what you mean here, sorry

> 6/ things that dont change during program execution (ie : constants) 
> should not be defined inside a function

As I mentioned above, these I placed globally:

main gtkwindows, 
smwin or not, 
pyexe or not,  
preferred encoging

according to your statement?


Anyway, since I did lot of changes, I'm myself confused actually.
http://calmar.ws/tmp/cal.html

Will try to cleanup and  implement even further all good
advices from all in some days.

Thanks a lot!!
calmar



-- 
  calmar

          (o_  It rocks: LINUX + Command-Line-Interface
          //\
          V_/_                     http://www.calmar.ws


From jasonsmith008 at charter.net  Sun Feb  5 09:13:24 2006
From: jasonsmith008 at charter.net (jason)
Date: Sun, 5 Feb 2006 09:13:24 -0500
Subject: NumPy error
Message-ID: <KLnFf.3$ug1.0@fe04.lga>

Hello:

I am using the following versions of Python and packages on Windows XP 
(SP2):

Python 2.4.2
NumPy  0.9.4.win32-py2.4
SciPy 0.4.4 for Python 2.4 and Pentium 4/SSE2

In the Python Shell I am running the following:

>>> from scipy.optimize import fmin
>>> def rosen(x):
              return sum(100.0*(x[1:]-x[:-1]**2.0)**2.0 + (1-x[:-1])**2.0)

>>> x0 = [1.3, 0.7, 0.8, 1.9, 1.2]
>>> xopt = fmin(rosen, x0)

I get the following error:

Traceback (most recent call last):
  File "<pyshell#6>", line 1, in -toplevel-
    xopt = fmin(rosen, x0)
  File "C:\Python24\Lib\site-packages\scipy\optimize\optimize.py", line 191, 
in fmin
    sim = Num.zeros((N+1,N),x0.dtypechar)
AttributeError: 'numpy.ndarray' object has no attribute 'dtypechar'

Any idea what the problem might be?

Thanks.




From malvert at telenet.be  Tue Feb  7 13:03:49 2006
From: malvert at telenet.be (malv)
Date: 7 Feb 2006 10:03:49 -0800
Subject: Dual Core outlook
References: <1139329268.695421.191340@g47g2000cwa.googlegroups.com>
	<dsajpk$c26$1@aphrodite.grec.isp.9tel.net>
Message-ID: <1139335428.970958.170320@o13g2000cwo.googlegroups.com>

Thank you Xavier.
Maybe this is too simplistic, but given two programs, one in Python the
other in Java or C#. Would this mean that running the latter on a dual
core processor would significantly increase execution speed, whereas
the Python program would be running in one processor only without any
speed up?

Is a Java program capable of this "out of the box" or does this require
specific additional code?
malv



From nyamatongwe+thunder at gmail.com  Mon Feb  6 17:19:30 2006
From: nyamatongwe+thunder at gmail.com (Neil Hodgson)
Date: Mon, 06 Feb 2006 22:19:30 GMT
Subject: UTF16, BOM, and Windows Line endings
In-Reply-To: <1139224580.820529.198120@z14g2000cwz.googlegroups.com>
References: <1139224580.820529.198120@z14g2000cwz.googlegroups.com>
Message-ID: <SXPFf.245245$V7.89096@news-server.bigpond.net.au>

Fuzzyman:

> How should I handle line-endings for UTF16 ? Is it possible that other
> programs (on windows) will have line endings as u'\r\n' ? 

    Yes, try Notepad and save as Unicode. For the text

Fuzzy
End of lines

 >>> contents = open("C:\\fuzzy.txt", "rb").read()
 >>> contents
'\xff\xfeF\x00u\x00z\x00z\x00y\x00\r\x00\n\x00E\x00n\x00d\x00 
\x00o\x00f\x00 \x00l\x00i\x00n\x00e\x00s\x00'
 >>>

    The '\r\x00\n\x00' is a u'\r\n'.

 > When saving
> files for that platform should I make the line endings u'\r\n' ? (This
> sequence obviously encodes to four bytes in UTF16). I would only do
> this to ensure compatibility with other programs the user may use to
> create the text files.

    Notepad will read u'\r\n'. It doesn't like '\n' or u'\n'. Some 
applications are OK with other line ends by '\r\n' and u'\r\n' are 
safest on Windows.

    Neil


From jstroud at ucla.edu  Wed Feb  8 18:52:09 2006
From: jstroud at ucla.edu (James Stroud)
Date: Wed, 08 Feb 2006 15:52:09 -0800
Subject: Tkinter, X-windows and ebay
In-Reply-To: <1tqdncP3Ps7s6XfenZ2dnUVZ_tGdnZ2d@nmt.edu>
References: <1tqdncP3Ps7s6XfenZ2dnUVZ_tGdnZ2d@nmt.edu>
Message-ID: <dse079$v5s$1@daisy.noc.ucla.edu>

Bob Greschke wrote:
> When you post something on eBay (and other places) you can use a 'browse' 
> button on a web page to send a picture file from your hard drive to them for 
> inclusion in your listing.  Can the same kind of thing (not the same exact 
> thing, of course) be done with a Python/Tkinter program that is running on a 
> remote machine (that you logged into to start the program), but that's just 
> using your computer's display (with X11 on a Mac, X-whatever on Linux, 
> X-Win32 on Windows, etc.)?  I've got an inventory program that runs this way 
> and it would be nice if users could create a text file on their machine, but 
> then have the program read that file and, for example, update item 
> quantities according to information in that file.  Things like that.
> 
> Thanks!
> 
> Bob
> 
> 

I think xml-rpc was designed to address these kinds of issues:

http://www.pythonware.com/products/xmlrpc/

James


From michaeltaft at gmail.com  Tue Feb 14 16:52:48 2006
From: michaeltaft at gmail.com (mwt)
Date: 14 Feb 2006 13:52:48 -0800
Subject: Clearing the screen
In-Reply-To: <mailman.1799.1139784222.27775.python-list@python.org>
References: <1139688262.046667.296940@g14g2000cwa.googlegroups.com>
	<1139735197.228877.71770@z14g2000cwz.googlegroups.com>
	<mailman.1799.1139784222.27775.python-list@python.org>
Message-ID: <1139953968.011216.210560@g43g2000cwa.googlegroups.com>

It clears the screen by scrolling all the characters out of sight at
the top of the terminal window. So the screen is blank, but not cleared
in the sense that I mean it. The behavior I want is for the display to
be effectively "erased" and ready to receive the next wave of data --
like you would do in a UI -- which is what I'm used to working with,
which is why this is mildly frustrating, and at least 1/3 of why I
sound like an idiot with this question.

Anyway, I don't want it to scroll, just, in essense "refresh". As a
total Python noob, my approach has been os.system("clear") ,then print
"something".



From grflanagan at yahoo.co.uk  Tue Feb 21 09:41:28 2006
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 21 Feb 2006 06:41:28 -0800
Subject: algorithm, optimization, or other problem?
References: <mailman.2223.1140524756.27775.python-list@python.org>
Message-ID: <1140532888.539864.52200@o13g2000cwo.googlegroups.com>

Brian Blais wrote:
> Hello,
>
> I am trying to translate some Matlab/mex code to Python, for doing neural
> simulations.  This application is definitely computing-time limited, and I need to
> optimize at least one inner loop of the code, or perhaps even rethink the algorithm.
>    The procedure is very simple, after initializing any variables:
>
> 1) select a random input vector, which I will call "x".  right now I have it as an
> array, and I choose columns from that array randomly.  in other cases, I may need to
> take an image, select a patch, and then make that a column vector.
>
> 2) calculate an output value, which is the dot product of the "x" and a weight
> vector, "w", so
>
> 	y=dot(x,w)
>
> 3) modify the weight vector based on a matrix equation, like:
>
> 	w=w+ eta * (y*x - y**2*w)
>                ^
>                |
>                +---- learning rate constant
>
> 4) repeat steps 1-3 many times
>


Brian

ETA = 0.001
INV_TAU = 1.0/100.0

rather than:

> params={}
> params['eta']=0.001;
> params['tau']=100.0;

ie. take the dictionary lookup (and the repeated division) out?

If you have a collection of random vectors do you gain anything by
*choosing* them randomly?

I'm not exactly sure if it's equivalent to your existing code, but how
about:

	x=random((100,250000))
	w=random((100,1));
	th=random((1,1))
	for vector in x:
		...
		w=w+ ETA * (y*vector - y**2*w)
		th = th + INV_TAU *(y**2-th)
		...

?  (I'm not familar with Numeric)

Gerard

> old_mx=0;
> for e in range(100):
>
>      rnd=randint(0,numpats,250000)
>      t1=time.time()
>      if 0:  # straight python
>          for i in range(len(rnd)):
>              pat=rnd[i]
>              xx=reshape(x[:,pat],(1,-1))
>              y=matrixmultiply(xx,w)
>              w=w+params['eta']*(y*transpose(xx)-y**2*w);
>              th=th+(1.0/params['tau'])*(y**2-th);
>      else: # pyrex
>          dohebb(params,w,th,x,rnd)
>      print time.time()-t1
> 
>



From girodt at gmail.com  Thu Feb 16 06:01:39 2006
From: girodt at gmail.com (Thomas Girod)
Date: 16 Feb 2006 03:01:39 -0800
Subject: multiple inheritance
In-Reply-To: <43f3cab1$0$501$9b4e6d93@newsread4.arcor-online.net>
References: <1140041977.692748.133570@g43g2000cwa.googlegroups.com>
	<1140043267.445069.218370@g43g2000cwa.googlegroups.com>
	<43f3cab1$0$501$9b4e6d93@newsread4.arcor-online.net>
Message-ID: <1140087699.448885.196750@z14g2000cwz.googlegroups.com>

thanks, you pointed exactly on what distrurbed me. I'll see what I can
do with cooperative methods.



From chris.atlee at gmail.com  Tue Feb 14 17:19:28 2006
From: chris.atlee at gmail.com (chris.atlee at gmail.com)
Date: 14 Feb 2006 14:19:28 -0800
Subject: Copying zlib compression objects
Message-ID: <1139955568.754530.164990@g44g2000cwa.googlegroups.com>

I'm writing a program in python that creates tar files of a certain
maximum size (to fit onto CD/DVD).  One of the problems I'm running
into is that when using compression, it's pretty much impossible to
determine if a file, once added to an archive, will cause the archive
size to exceed the maximum size.

I believe that to do this properly, you need to copy the state of tar
file (basically the current file offset as well as the state of the
compression object), then add the file.  If the new size of the archive
exceeds the maximum, you need to restore the original state.

The critical part is being able to copy the compression object.
Without compression it is trivial to determine if a given file will
"fit" inside the archive.  When using compression, the compression
ratio of a file depends partially on all the data that has been
compressed prior to it.

The current implementation in the standard library does not allow you
to copy these compression objects in a useful way, so I've made some
minor modifications (patch follows) to the standard 2.4.2 library:
- Add copy() method to zlib compression object.  This returns a new
compression object with the same internal state.  I named it copy() to
keep it consistent with things like sha.copy().
- Add snapshot() / restore() methods to GzipFile and TarFile.  These
work only in write mode.  snapshot() returns a state object.  Passing
in this state object to restore() will restore the state of the
GzipFile / TarFile to the state represented by the object.

Future work:
- Decompression objects could use a copy() method too
- Add support for copying bzip2 compression objects

Does this seem like a good approach?

Cheers,
Chris

diff -ur Python-2.4.2.orig/Lib/gzip.py Python-2.4.2/Lib/gzip.py
--- Python-2.4.2.orig/Lib/gzip.py	2005-06-09 10:22:07.000000000 -0400
+++ Python-2.4.2/Lib/gzip.py	2006-02-14 13:12:29.000000000 -0500
@@ -433,6 +433,17 @@
         else:
             raise StopIteration

+    def snapshot(self):
+        if self.mode == READ:
+            raise IOError("Can't create a snapshot in READ mode")
+        return (self.size, self.crc, self.fileobj.tell(), self.offset,
self.compress.copy())
+
+    def restore(self, s):
+        if self.mode == READ:
+            raise IOError("Can't restore a snapshot in READ mode")
+        self.size, self.crc, offset, self.offset, self.compress = s
+        self.fileobj.seek(offset)
+        self.fileobj.truncate()

 def _test():
     # Act like gzip; with -d, act like gunzip.
diff -ur Python-2.4.2.orig/Lib/tarfile.py Python-2.4.2/Lib/tarfile.py
--- Python-2.4.2.orig/Lib/tarfile.py	2005-08-27 06:08:21.000000000
-0400
+++ Python-2.4.2/Lib/tarfile.py	2006-02-14 16:50:41.000000000 -0500
@@ -1825,6 +1825,28 @@
         """
         if level <= self.debug:
             print >> sys.stderr, msg
+
+    def snapshot(self):
+        """Save the current state of the tarfile
+        """
+        self._check("_aw")
+        if hasattr(self.fileobj, "snapshot"):
+            return self.fileobj.snapshot(), self.offset,
self.members[:]
+        else:
+            return self.fileobj.tell(), self.offset, self.members[:]
+
+    def restore(self, s):
+        """Restore the state of the tarfile from a previous snapshot
+        """
+        self._check("_aw")
+        if hasattr(self.fileobj, "restore"):
+            snapshot, self.offset, self.members = s
+            self.fileobj.restore(snapshot)
+        else:
+            offset, self.offset, self.members = s
+            self.fileobj.seek(offset)
+            self.fileobj.truncate()
+
 # class TarFile

 class TarIter:
diff -ur Python-2.4.2.orig/Modules/zlibmodule.c
Python-2.4.2/Modules/zlibmodule.c
--- Python-2.4.2.orig/Modules/zlibmodule.c	2004-12-28
15:12:31.000000000 -0500
+++ Python-2.4.2/Modules/zlibmodule.c	2006-02-14 14:05:35.000000000
-0500
@@ -653,6 +653,36 @@
     return RetVal;
 }

+PyDoc_STRVAR(comp_copy__doc__,
+"copy() -- Return a copy of the compression object.");
+
+static PyObject *
+PyZlib_copy(compobject *self, PyObject *args)
+{
+    compobject *retval;
+
+    retval = newcompobject(&Comptype);
+
+    /* Copy the zstream state */
+    /* TODO: Are the ENTER / LEAVE needed? */
+    ENTER_ZLIB
+    deflateCopy(&retval->zst, &self->zst);
+    LEAVE_ZLIB
+
+    /* Make references to the original unused_data and unconsumed_tail
+     * They're not used by compression objects so we don't have to do
+     * anything special here */
+    retval->unused_data = self->unused_data;
+    retval->unconsumed_tail = self->unconsumed_tail;
+    Py_INCREF(retval->unused_data);
+    Py_INCREF(retval->unconsumed_tail);
+
+    /* Mark it as being initialized */
+    retval->is_initialised = 1;
+
+    return (PyObject*)retval;
+}
+
 PyDoc_STRVAR(decomp_flush__doc__,
 "flush() -- Return a string containing any remaining decompressed
data.\n"
 "\n"
@@ -723,6 +753,8 @@
                  comp_compress__doc__},
     {"flush", (binaryfunc)PyZlib_flush, METH_VARARGS,
               comp_flush__doc__},
+    {"copy", (binaryfunc)PyZlib_copy, METH_VARARGS,
+              comp_copy__doc__},
     {NULL, NULL}
 };



From luis_lupe2XXX at netvisaoXXX.pt  Mon Feb  6 08:06:27 2006
From: luis_lupe2XXX at netvisaoXXX.pt (Luis P. Mendes)
Date: Mon, 06 Feb 2006 13:06:27 +0000
Subject: psycopg2 rounds unix time [solved]
In-Reply-To: <mailman.1466.1139201482.27775.python-list@python.org>
References: <44np6pF3445fU1@individual.net>
	<mailman.1466.1139201482.27775.python-list@python.org>
Message-ID: <44ovu9F387tfU1@individual.net>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1


|> example:
|> unix time inserted at first row: 1138839839.64456
|> unix time as retrieved in psql: 1.13884e+09
|> unix time retrieved by psycopg2: 1138840000.0

| Note: When timestamp values are stored as double precision
| floating-point numbers (currently the default), the effective limit of
| precision may be less than 6. timestamp values are stored as seconds
| before or after midnight 2000-01-01. Microsecond precision is achieved
| for dates within a few years of 2000-01-01, but the precision degrades
| for dates further away. When timestamp values are stored as eight-byte
| integers (a compile-time option), microsecond precision is available
| over the full range of values. However eight-byte integer timestamps
| have a more limited range of dates than shown above: from 4713 BC up to
| 294276 AD. The same compile-time option also determines whether time and
| interval values are stored as floating-point or eight-byte integers. In
| the floating-point case, large interval values degrade in precision as
| the size of the interval increases.
| """
|
| Otherwise, what data type *are* you using to store the Unix time?

Thank you for your answer.

In python, I use float data type to deal with time values (from
time.time()), for example.

In Postgresql, the unix time field was set up as real.  I've changed it
to double precision and it runs fine, now.


Luis P. Mendes
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Version: GnuPG v1.4.1 (GNU/Linux)
Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org

iD8DBQFD50nTHn4UHCY8rB8RAkUUAJ9Pby8S5do7c7qMYjC6t222eDyG8wCfTJOR
aGMlkq86dN1juXUjBMgRuGQ=
=nnGl
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From http  Mon Feb 13 14:12:04 2006
From: http (Paul Rubin)
Date: 13 Feb 2006 11:12:04 -0800
Subject: hard disk activity
References: <1139850420.902979.71620@o13g2000cwo.googlegroups.com>
	<g9i1v1lbf2rhmgskmkh5f9mt73s67umckk@4ax.com>
	<1139857505.376840.37440@g43g2000cwa.googlegroups.com>
Message-ID: <7xslqnul8b.fsf@ruckus.brouhaha.com>

"VSmirk" <vania.smirk at gmail.com> writes:
> I am needing to synchronize the file on a remote folder, and my current
> solution, which simply copies the file if a date comparison or a
> content comparison, becomes a bit unmanageable for very large files.
> Some of the files I'm working with are hundreds of MB in size, or
> larger.

Why don't you look at the rsync program:

  http://samba.anu.edu.au/rsync/

but for that much data, just plopping it all in a huge file is not
a great approach if you can help it.  Maybe you can use a database instead.


From cito at online.de  Sun Feb 12 04:35:01 2006
From: cito at online.de (Christoph Zwerschke)
Date: Sun, 12 Feb 2006 10:35:01 +0100
Subject: Shortest prime number program
In-Reply-To: <mailman.1774.1139731711.27775.python-list@python.org>
References: <1139652226.869102.310180@g14g2000cwa.googlegroups.com>	<1139673716.241461.84110@g47g2000cwa.googlegroups.com>	<dsl4ae$l97$1@online.de>	<l042c3-1lb.ln1@prcm.tecont.de>
	<mailman.1774.1139731711.27775.python-list@python.org>
Message-ID: <dsmvg3$7ra$1@online.de>

Tim Hochberg wrote:
> from itertools import count, ifilter
> def sieve(s=count(2)):
>  while 1:p=s.next();s=ifilter(p.__rmod__,s);yield p

Nice!

-- Christoph


From public at alexisgallagher.com  Tue Feb 21 05:18:15 2006
From: public at alexisgallagher.com (Alexis Gallagher)
Date: Tue, 21 Feb 2006 10:18:15 +0000
Subject: fast text processing
In-Reply-To: <mailman.2209.1140513044.27775.python-list@python.org>
References: <dteiec$o7m$1@news.ox.ac.uk>
	<mailman.2209.1140513044.27775.python-list@python.org>
Message-ID: <dtepd7$qi8$1@news.ox.ac.uk>

Steve,

First, many thanks!

Steve Holden wrote:
> Alexis Gallagher wrote:
>>
>> filehandle = open("data",'r',buffering=1000)
> 
> This buffer size seems, shall we say, unadventurous? It's likely to slow 
> things down considerably, since the filesystem is probably going to 
> naturally wnt to use a rather larger value. I'd suggest a 64k minumum.

Good to know. I should have dug into the docs deeper. Somehow I thought 
it listed lines not bytes.

>> for currentLine in filehandle.readlines():
>>
> Note that this is going to read the whole file in to (virtual) memory 
> before entering the loop. I somehow suspect you'd rather avoid this if 
> you could. I further suspect your testing has been with smaller files 
> than 80GB ;-). You might want to consider
> 

Oops! Thanks again. I thought that readlines() was the generator form, 
based on the docstring comments about the deprecation of xreadlines().

>> So on every iteration I'm processing mutable strings -- this seems 
>> wrong. What's the best way to speed this up? Can I switch to some fast 
>> byte-oriented immutable string library? Are there optimizing 
>> compilers? Are there better ways to prep the file handle?
>>
> I'm sorry but I am not sure where the mutable strings come in. Python 
> strings are immutable anyway. Well-known for it.

I misspoke. I think was mixing this up with the issue of object-creation 
overhead for all of the string handling in general. Is this a bottleneck 
to string processing in python, or is this a hangover from my Java days? 
I would have thought that dumping the standard string processing 
libraries in favor of byte manipulation would have been one of the 
biggest wins.

> Of course you leave us in the dark about the nature of 
> table.markEquivalent as well.

markEquivalent() implements union-join (aka, uptrees) to generate 
equivalence classes. Optimising that was going to be my next task

I feel a bit silly for missing the double-processing of everything. 
Thanks for pointing that out. And I will check out the biopython package.

I'm still curious if optimizing compilers are worth examining. For 
instance, I saw Pyrex and Pysco mentioned on earlier threads. I'm 
guessing that both this tokenizing and the uptree implementations sound 
like good candidates for one of those tools, once I shake out these 
algorithmic problems.


alexis


From jeff at schwabcenter.com  Wed Feb 22 09:16:48 2006
From: jeff at schwabcenter.com (Jeffrey Schwab)
Date: Wed, 22 Feb 2006 14:16:48 GMT
Subject: Basic coin flipper program - logical error help
In-Reply-To: <UoOKf.49379$id5.43228@bgtnsc04-news.ops.worldnet.att.net>
References: <1140567243.251982.255620@g14g2000cwa.googlegroups.com>
	<UoOKf.49379$id5.43228@bgtnsc04-news.ops.worldnet.att.net>
Message-ID: <kn_Kf.17239$915.11046@southeast.rr.com>

wes weston wrote:
> DannyB wrote:
> 
>> I'm just learning Python.  I've created a simple coin flipper program -

...

> Dan,
>    Looping is easier with:
> for x in range(100):
>    if random.randint(0,1) == 0:
>       heads += 1
>    else:
>       tails += 1
> 

Or, continuing with that theme:

	for x in range(N):
		heads += random.randint(0, 1)

As in:

	import random
	N = 100
	heads = 0
	for x in range(N):
		heads += random.randint(0, 1)
	print "%d heads and %d tails." % (heads, N - heads)


From eoinrogers at gmail.com  Mon Feb 13 13:21:50 2006
From: eoinrogers at gmail.com (Byte)
Date: 13 Feb 2006 10:21:50 -0800
Subject: Location of Python modules
In-Reply-To: <1139854642.175799.165950@g43g2000cwa.googlegroups.com>
References: <1139854184.504114.46690@z14g2000cwz.googlegroups.com>
	<1139854642.175799.165950@g43g2000cwa.googlegroups.com>
Message-ID: <1139854910.669876.84730@o13g2000cwo.googlegroups.com>

No, not there

 -- /usr/bin/byte



From vania.smirk at gmail.com  Mon Feb 13 14:27:30 2006
From: vania.smirk at gmail.com (VSmirk)
Date: 13 Feb 2006 11:27:30 -0800
Subject: hard disk activity
In-Reply-To: <7xslqnul8b.fsf@ruckus.brouhaha.com>
References: <1139850420.902979.71620@o13g2000cwo.googlegroups.com>
	<g9i1v1lbf2rhmgskmkh5f9mt73s67umckk@4ax.com>
	<1139857505.376840.37440@g43g2000cwa.googlegroups.com>
	<7xslqnul8b.fsf@ruckus.brouhaha.com>
Message-ID: <1139858850.176471.63800@g14g2000cwa.googlegroups.com>

I agree with you wholeheartedly, but the large files is part of the
business requirements.

Thanks for the link.  I'll look into it.

V



From sandravandale at yahoo.com  Sat Feb 25 18:53:08 2006
From: sandravandale at yahoo.com (Sandra-24)
Date: 25 Feb 2006 15:53:08 -0800
Subject: Modify the local scope inside a function
Message-ID: <1140911588.659020.7640@i39g2000cwa.googlegroups.com>

Is there a way in python to add the items of a dictionary to the local
function scope? i.e. var_foo = dict['var_foo']. I don't know how many
items are in this dictionary, or what they are until runtime.

exec statements are difficult for debuggers to deal with, so as a
workaround I built my code into a function and saved it in a .py file.
The I load the .py file as a module and call the function instead. This
works great, and it has the added advantage of precompiled versions of
the code being saved as .pyc and .pyo files. (faster repeated
execution)

The only trouble was I execed inside a specially created scope
dictionary containing various variables and functions that the code
requires. I can't seem to figure out how to get this same effect inside
the function. Right now I'm passing the dict as an argument to the
function, but I can't modify locals() so it doesn't help me.

Thanks,
-Sandra



From steve at REMOVETHIScyber.com.au  Fri Feb 24 05:25:24 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 24 Feb 2006 21:25:24 +1100
Subject: regular expresson for Unix and Dos Lineendings wanted
References: <jterv157550g4qd4rosc3a2o8l69gcau8v@4ax.com>
	<mailman.2346.1140703308.27775.python-list@python.org>
	<ujgrv19d4thh28cvh4emqi2m1p5g1gofuh@4ax.com>
Message-ID: <pan.2006.02.24.10.25.23.754379@REMOVETHIScyber.com.au>

On Thu, 23 Feb 2006 15:13:01 +0100, Franz Steinhaeusler wrote:

>>why not use string methods strip, rstrip and lstrip
>>
> 
> because this removes only the last spaces,
>>>> r
> 'erewr    \r\nafjdskl     '
>>>> r.rstrip()
> 'erewr    \r\nafjdskl'
> 
> I want:
> 'erewr\r\nafjdskl'
> 
> or for unix line endings
> 'erewr\nafjdskl'


# Untested
def whitespace_cleaner(s):
    """Clean whitespace from string s, returning new string.

    Strips all trailing whitespace from the end of the string, including
    linebreaks. Removes whitespace except for linebreaks from everywhere
    in the string. Internal linebreaks are converted to whatever is
    appropriate for the current platform.
    """

    from os import linesep
    from string import whitespace
    s = s.rstrip()
    for c in whitespace:
        if c in '\r\n': 
            continue
        s = s.replace(c, '')
    if linesep == '\n': # Unix, Linux, Mac OS X, etc.
        # the order of the replacements is important
        s = s.replace('\r\n', '\n').replace('\r', '\n')
    elif linesep == '\r':  # classic Macintosh
        s = s.replace('\r\n', '\r').replace('\n', '\r')
    elif linesep == '\r\n':  # Windows
        s = s.replace('\r\n', '\r').replace('\n', '\r')
        s = s.replace('\r', '\r\n')
    else: # weird platforms?
        print "Unknown line separator, skipping."
    return s



-- 
Steven.



From mikeisgreat at gmail.com  Thu Feb  2 19:13:42 2006
From: mikeisgreat at gmail.com (mikeisgreat at gmail.com)
Date: 2 Feb 2006 16:13:42 -0800
Subject: learning python, using string help
References: <1138906062.727850.177960@g14g2000cwa.googlegroups.com>
	<fwsEf.24314$1%5.18129@tornado.texas.rr.com>
	<1138909296.301962.16230@z14g2000cwz.googlegroups.com>
	<Pine.LNX.4.62.0602022221500.8737@urchin.earth.li>
Message-ID: <1138925622.456566.133860@g47g2000cwa.googlegroups.com>

thanks tom,

I am running OpenBSD, NetBSD as well as OS X (FreeBSD)

My first python script

#!/usr/local/bin/python

print "Content-type:text/html\n\n";

import os, string

getrup = os.popen('ruptime').read()
show = getrup.splitlines()

for line in show:
	if line.find("up" or "down"):
		UP = "<font color='GREEN'>UP</font>"
		DOWN = "<font color='RED'>DOWN</font>"
		line = line.replace("up", UP )
		line = line.replace("down", DOWN )

		print "<pre>%s</pre>" % line

But I was refering to more or lest format specifiers like  %2d, %2s,
%.2f
I know I can do it in HTML or CSS.

But I am glad you sent me that code ... it has helped me learn.

--thanks



From rays at blue-cove.com  Sun Feb 19 13:37:09 2006
From: rays at blue-cove.com (RayS)
Date: Sun, 19 Feb 2006 10:37:09 -0800
Subject: Req. for module style/organization 
Message-ID: <6.2.3.4.2.20060219102114.02bc36a0@pop-server.san.rr.com>

I've begun a Python module to provide a complete interface to the 
Meade LX200 command set, and have searched for a style/development 
guide for Python Lib/site-packages type modules, but only saw guides 
for C-modules.  I realize that I need to make some changes to follow
http://www.python.org/doc/essays/styleguide.html
better. Does anyone have an appropriate URL for me to follow for this 
task? Is one of the C-module guides appropriate?

I had quickly parsed the official PDF into prototype methods and 
started off, got some good advice from Python-list and MAPUG, and 
broke it into Classes:
http://rjs.org/Python/LX200.zip
Not having written a generic module before, I'd like input on 
organization and style.  As I usually learn from examples, I browsed 
2.4 Lib/site-packages/ and saw a wide variety of structure:
-some have empty __init__.py files, others are loaded
-some have module vars and methods, others not
-some have 0, 1, or many classes per .py file

I have:
LX200/
     __init__.py
     LXSerial.py
     Telescope.py
     Focuser.py
     LXUtils.py
     ... etc
Each file has one class defined.
In the above, LXSerial, Telescope and Focuser are actual separate 
objects (there are others). None can be used without the serial port, 
but some might be used without a scope present. They all ultimately 
rely on a set of atomic serial commands in somewhat overlapping 
categories, not all of which are available on every model device 
(many other makers follow the LX set for its inertia). There is a 
second com port available for optional separate control, but rarely 
used by anyone.
I am trying also to follow the ASCOM standard for names and 
high-level function behavior, as just a subset of the total of 
methods. (ASCOM is the biggest standard in the amateur astro 
industry, but is entirely MS COM, not even CORBA.) That part isn't very hard.

Currently, a user creates a port object, tests ports if desired, then 
opens one (presumably with an LX on the other end, or it Excepts). A 
Telescope object is created before or after, and the port object is 
set as an attribute of the scope. Alternatively, I could require that 
the port is passed explicitly to the Telescope methods, and likewise 
the accessory's methods... There is the issue of inheritance and 
making Classes aware of parents' objects and other Classes' stuff (if needed).

Where in this structure should constants be defined? __init__, 
module*.py, or the module's Class(s)?
Should I rename LXSerial to _serial?
BAUD rate is 9600, so speed here is a non-issue.

The seeming lack of uniformity in the Libs/* is causing my uncertainty:
All advice is appreciated,
Ray



From python-url at phaseit.net  Mon Feb 20 17:11:48 2006
From: python-url at phaseit.net (Cameron Laird)
Date: Mon, 20 Feb 2006 22:11:48 +0000
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Feb 20)
Message-ID: <mailman.2195.1140480034.27775.python-announce-list@python.org>

QOTW:  "On the other hand, lousy testing is practically worthless." - Steve
D'Aprano

"Komodo adds no goo to your code." - Trent Mick


    A nice if implicit comparison of stylish use of a regular
    expression vs. an equally stylish procedural approach:  which
    is easier for *you* to maintain?
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/104e2da852269d01/

    Sibylle Koczian, Fredrik Lundh, and others illustrate
    simple function nesting as an example of "free variables"
    or "enclosing scope locals":
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/3c682f2af5bc039b/

    Diez B. Roggisch comments on the portability and applicability
    of IronPython:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/2762f6dfc5f72651/

    To safen a Python sandbox is less quixotic than you might
    have heard:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/e6e428d39998bffc/

    lambda stays:
        http://mail.python.org/pipermail/python-dev/2006-February/060415.html
        

========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Steve Bethard, Tim Lesher, and Tony Meyer continue the marvelous
    tradition early borne by Andrew Kuchling, Michael Hudson and Brett
    Cannon of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and
sponsor the "Python-URL!" project.


From martin at v.loewis.de  Sun Feb 12 17:01:24 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 12 Feb 2006 23:01:24 +0100
Subject: PEP 353: Using ssize_t as the index type
In-Reply-To: <*firstname*nlsnews-5E510A.14573712022006@news.verizon.net>
References: <43ef0792$0$11891$9b622d9e@news.freenet.de>
	<*firstname*nlsnews-5E510A.14573712022006@news.verizon.net>
Message-ID: <43EFB034.6080701@v.loewis.de>

Tony Nelson wrote:
> Minor typo:  "too"

Thanks, fixed.

Martin


From uval at rz.uni-karlsruhe.de  Mon Feb 20 21:05:12 2006
From: uval at rz.uni-karlsruhe.de (=?ISO-8859-1?Q?Sch=FCle_Daniel?=)
Date: Tue, 21 Feb 2006 03:05:12 +0100
Subject: how to break a for loop?
In-Reply-To: <1140476451.649515.127230@g44g2000cwa.googlegroups.com>
References: <1140476451.649515.127230@g44g2000cwa.googlegroups.com>
Message-ID: <dtdie1$c0b$1@news2.rz.uni-karlsruhe.de>

Gregory Petrosyan wrote:
> Hello!
> It's 1:56 o'clock in St.-Petersburg now, and I am still coding... maybe
> that's why I encountered stupid problem: I need to remove zeros from
> the begining of list, but I can't :-(. I use
> 
>         for i,coef in enumerate(coefs):
>             if coef == 0:
>                 del coefs[i]
>             else:
>                 break
> 
> but it removes ALL zeros from list. What's up?

I don't know how enumerate is implemented, but I would
suspect that modifying the list object in the loop
through del is asking for trouble

try
for i,coef in enumerate(coefs[:]):
instead

> P.S. I feel SO stupid asking this quastion... ;-)

uda4i

hth, Daniel



From michael at adrhinum.de  Sun Feb 26 15:11:56 2006
From: michael at adrhinum.de (Michael Amrhein)
Date: Sun, 26 Feb 2006 21:11:56 +0100
Subject: Do I need to convert string to integer in python?
In-Reply-To: <1140983754.000103.104710@i40g2000cwc.googlegroups.com>
References: <1140983754.000103.104710@i40g2000cwc.googlegroups.com>
Message-ID: <44020B8C.3080602@adrhinum.de>

Allerdyce.John at gmail.com schrieb:
> Do I need to convert string to integer in python? or it will do it for
> me (since dynamic type)?
> 
> In my python script, I have this line:
>     x /= 10;
> 
> when i run it, I get this error:
> TypeError: unsupported operand type(s) for /=: 'unicode' and 'int'
> 
> I want to divide x by 10 and assign that value back to x.
> 
> Thank you.
> 
 >>> x=100
 >>> x/=10
 >>> x
10
 >>> x='100'
 >>> x/=10

Traceback (most recent call last):
   File "<pyshell#4>", line 1, in -toplevel-
     x/=10
TypeError: unsupported operand type(s) for /=: 'str' and 'int'
 >>> x=int(x)/10
 >>> x
10

Michael


From artur_spruce at yahoo.com  Sun Feb  5 07:41:37 2006
From: artur_spruce at yahoo.com (AdSR)
Date: 5 Feb 2006 04:41:37 -0800
Subject: fairly large webapp: from Java to Python. experiences?
References: <1139005746.363918.267370@g47g2000cwa.googlegroups.com>
	<1139018653.508049.182020@g43g2000cwa.googlegroups.com>
	<prVEf.7358$MF1.4951@fe08.lga>
	<j88Ff.160530$65.4490774@twister1.libero.it>
Message-ID: <1139143297.054618.274000@g14g2000cwa.googlegroups.com>

Giovanni Bajo wrote:
> Also Python code is pretty bare-metal, so that
> file.write or socket.write go to the syscall immediately. Try that in Java and
> you'll find 30 layers of complex abstractions for doubtful benefits and obvious
> slowness.

+1 QOTW
(I'd recommend the whole post but it might be too long.)

Cheers,

AdSR



From benji at benjiyork.com  Sun Feb 19 16:23:46 2006
From: benji at benjiyork.com (Benji York)
Date: Sun, 19 Feb 2006 16:23:46 -0500
Subject: editor for Python on Linux
In-Reply-To: <lanhv1t0sp8endde3l2ritbm7qpn3n1fdc@4ax.com>
References: <dtai6e$23m$2@ariane.blic.net>	<mailman.2134.1140381888.27775.python-list@python.org>
	<lanhv1t0sp8endde3l2ritbm7qpn3n1fdc@4ax.com>
Message-ID: <43F8E1E2.8000602@benjiyork.com>

Rene Pijlman wrote:
> Sriram Krishnan:
> 
>>Check out http://wiki.python.org/moin/PythonEditors.
> 
> 
> This page can't be taken seriously. vi is not listed.

I hope your <wink> key is broken; I wouldn't wish old-school vi on my 
worst enemy.  Fortunately that page lists the wonderful Vim instead, so 
seriousness has been maintained.

To the OP: a serious editor is a basic necessity of coding, so pick 
Emacs, Vim, or something equivalent.  Just make sure it's customizable 
and you enjoy customizing it because you'll want to.
--
Benji York


From rtilley at vt.edu  Thu Feb 23 13:20:36 2006
From: rtilley at vt.edu (rtilley)
Date: Thu, 23 Feb 2006 13:20:36 -0500
Subject: spaces at ends of filenames or directory names on Win32
Message-ID: <dtkuav$keb$1@solaris.cc.vt.edu>

# Spaces are present before and after the XXX
filename = ' XXX '

new_filename = filename.strip()

if new_filename != filename:
     print filename

Macs allow these spaces in file and folder names. Which is OK. The 
problem arises when the file or folder is copied to a PC running Windows 
from a Mac. Windows allows the Mac to copy the file to it, but when 
Windows itself attempts to do anything with the file it strips the 
spaces and then tries to move it, copy it, etc and complains that the 
file isn't there!

I can rectify this by striping the spaces from the files and folders on 
the Mac before they are copied to the PC or mounting the Windows share 
from the Mac and running a recursive strip program I wrote, but Windows 
will not allow the whitespace removal directly from within Windows.... 
how annoying!

For example... tell windows to move a file named ' XXX ' (one space 
before and one space after the filename). Windows will complain that 
file 'XXX' does not exist. It's correct of course, 'XXX' does not exist, 
but ' XXX ' does indeed exist.

Can anyone rescue me from this madness :(

Many Thanks,
Brad


From franz.steinhaeusler at gmx.at  Fri Feb 24 12:01:02 2006
From: franz.steinhaeusler at gmx.at (Franz Steinhäusler)
Date: Fri, 24 Feb 2006 18:01:02 +0100
Subject: regular expresson for Unix and Dos Lineendings wanted
References: <jterv157550g4qd4rosc3a2o8l69gcau8v@4ax.com>
	<dohtv1h996df7h2jhdn3i283gac99rra3b@4ax.com>
	<X-6dnXQjKfivZ2PeRVn-rQ@comcast.com>
Message-ID: <nreuv1l8atf9ju78djfs2g7g2de2otpsr5@4ax.com>

On Fri, 24 Feb 2006 07:21:04 -0500, John Zenger
<john_zenger at yahoo.com> wrote:

>Franz Steinhaeusler wrote:
>> 
>> Thank you all for the replies.
>> But I still don't have a solution.
>> 
>> Of course with more lines it is possible, 
>> but it would be fine to have a "oneliner".
>
>re.sub(r"\s+[\n\r]+", lambda x: x.expand("\g<0>"). \
>     lstrip(" \t\f\v"),text).rstrip()
>
>...where "text" is the unsplit block of text with mysterious line-endings.
>
>But I think your code is a lot easier to read.  :)

Hello John,

perfect, thank you,

but as you said, this is somehow not so easy to grasp.
(At least for me). :-)



-- 
Franz Steinhaeusler


From fuzzyman at gmail.com  Wed Feb  8 07:18:33 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 8 Feb 2006 04:18:33 -0800
Subject: module with __call__ defined is not callable?
In-Reply-To: <mailman.1591.1139400885.27775.python-list@python.org>
References: <mailman.1580.1139367500.27775.python-list@python.org>
	<pan.2006.02.08.10.21.24.46790@REMOVETHIScyber.com.au>
	<1139394463.255902.168960@f14g2000cwb.googlegroups.com>
	<mailman.1591.1139400885.27775.python-list@python.org>
Message-ID: <1139401113.301377.21520@g47g2000cwa.googlegroups.com>


Steve Holden wrote:
> Fuzzyman wrote:
> > Steven D'Aprano wrote:
> >
> >>On Wed, 08 Feb 2006 13:58:13 +1100, Delaney, Timothy (Tim) wrote:
> >>
> >>
> >>>adam johnson wrote:
> >>>
> >>>
> >>>>Hi All.
> >>>>I was wondering why defining a __call__ attribute for a module
> >>>>doesn't make it actually callable.
> >>>
> >>>For the same reason that the following doesn't work
> >>
> >>[snip example]
> >>
> >>>The __call__ attribute must be defined on the class (or type) - not on
> >>>the instance. A module is an instance of <type 'module'>.
> >>
> >>That's not a _reason_, it is just a (re-)statement of fact. We know that
> >>defining a __call__ method on a module doesn't make it callable. Why not?
> >>The answer isn't "because defining a __call__ method on a module or an
> >>instance doesn't make it callable", that's just avoiding the question.
> >>
> >>Someone had to code Python so that it raised an error when you try to call
> >>a module object. Is there a reason why module() should not execute
> >>module.__call__()? I would have thought that by the duck typing principle,
> >>it shouldn't matter whether the object was a class, a module or an int, if
> >>it has a __call__ method it should be callable.
> >>
> >
> >
> > It would nice if you could make modules callable.
> >
> Right. While we're at it, why don't we make strings callable. Calling a
> string could call the function whose name (in some namespace or other)
> was in the string. And we can make integers callable too - that could
> just assume that the integer was the address of a function to be called.
>
> In case you think I'm joking, I am.
>
> Why should a module be callable? What's the advantage? Should we be able
> to add two modules together, yielding a module that contains all the
> code of both modules? What happens if I multiply a module by two -
> presumably the result should be the same as adding a module to itself?
> Perhaps we should be able to divide a module by a function?
>
> The pursuit of orthogonality, while admirable, can lead to insanity if
> pushed too far.
>

Sure - feel free to venture as far down the road of insanity as you
like :-) To pursue your analogy, why don't we answer all usenet posts
by pushing suggestions to ridiculous levels ? ;-)

What would actually be the problem with allowing modules to define a
__call__ though ? This would allow for nice clean namespaces at the
module level.

Ok, so there are other ways of doing it - but it's not at all
illogical.

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml

> regards
>   Steve
> --
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC                     www.holdenweb.com
> PyCon TX 2006                  www.python.org/pycon/



From john_zenger at yahoo.com  Sun Feb 19 23:32:16 2006
From: john_zenger at yahoo.com (John Zenger)
Date: Sun, 19 Feb 2006 23:32:16 -0500
Subject: number ranges (was Re: Matlab page on scipy wiki)
In-Reply-To: <43F8D881.5030804@sympatico.ca>
References: <e86a5fd00602131854s73191cbbu742d4434ad074908@mail.gmail.com>
	<1139945386.3346.38.camel@pc1.cole.uklinux.net>
	<43F8D881.5030804@sympatico.ca>
Message-ID: <gfmdnZrrLeHK22TenZ2dnUVZ_tCdnZ2d@comcast.com>

Colin J. Williams wrote:
> Bryan Cole wrote:
> 
>>>       
>>> First, I think the range() function in python is ugly to begin with.
>>> Why can't python just support range notation directly like 'for a in
>>> 0:10'.  Or with 0..10 or 0...10 syntax.  That seems to make a lot more
>>> sense to me than having to call a named function.   Anyway, that's a
>>> python pet peeve, and python's probably not going to change something
>>> so fundamental...   

I strongly agree that Python should promote range or xrange to syntax. 
I favor [0..10] rather than [0:10] because 0..10 is inherently easier to 
understand.  Every maths text I have read uses the ".." notation to show 
ranges; for that reason, perhaps, Haskell uses "..".  The colon is 
already overused; it both signals the beginning of compound statements, 
and has all sorts of slice/indexing meanings when it is inside square 
brackets, depending on how many colons there are and whether there are 
arguments between them.

Haskell also has a good step notation.  In Haskell:

[1..10] means [1,2,3,4,5,6,7,8,9,10]
[1,3..10] means [1,3,5,7,9]


From johnjsal at NOSPAMgmail.com  Fri Feb 24 13:34:48 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 24 Feb 2006 18:34:48 GMT
Subject: a little more help with python server-side scripting
In-Reply-To: <dtnbjp$va6$1@wake.carmen.se>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<dSoLf.1663$No6.38996@news.tufts.edu> <dtmhot$4t4$1@wake.carmen.se>
	<nTELf.1667$No6.38886@news.tufts.edu>
	<43ff1d75$1_1@newspeer2.tds.net>
	<xNFLf.1672$No6.39067@news.tufts.edu> <dtnbjp$va6$1@wake.carmen.se>
Message-ID: <clILf.1673$No6.38927@news.tufts.edu>

Magnus Lycka wrote:

> Listen John. This will be the last time I respond
> to this thread, since you just ask more and more
> instead of digesting all the information you are
> given. Why should we spend time on answers if you
> don't read them properly anyway.

Well, I appreciate the help. I'm trying to figure it out, but it seems 
like with each new post, there is some new technology being mentioned or 
new method to do what I'm trying to do. I guess I'm not well-versed 
enough in Python to even attempt this kind of thing yet. I didn't 
realize it would be this complicated. I guess I hoped it would be as 
easy as including some PHP code and letting the server detect the .php 
extension and handle it all. I'm going to try to solidify the basics 
first, then move on to web programming a little later.


From kent at kentsjohnson.com  Wed Feb 22 10:20:31 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Wed, 22 Feb 2006 10:20:31 -0500
Subject: No
In-Reply-To: <1140551897.304048.47440@f14g2000cwb.googlegroups.com>
References: <1140534490.873612.64280@g47g2000cwa.googlegroups.com>
	<1140544942.394795.240520@g47g2000cwa.googlegroups.com>
	<mailman.2253.1140545818.27775.python-list@python.org>
	<1140551897.304048.47440@f14g2000cwb.googlegroups.com>
Message-ID: <43fc7cbb_1@newspeer2.tds.net>

Gaz wrote:
> Aye, but the file is in MY drive, not the server. Perhaps  thats the
> issue? I bet it's so... how should i deal with it? Perhaps should be a
> script that uploads the files to the server and then emails it... i
> believed this was handled using the root in my PC, but now i see this
> is not correct.
> 
> Now i need a script for uploading the files from MY pc and then use the
> sendmail thingie. Any tips about that script?
> 
google 'python cgi file upload' for many examples.

Kent


From onurb at xiludom.gro  Tue Feb 14 10:41:33 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Tue, 14 Feb 2006 16:41:33 +0100
Subject: Embedding an Application in a Web browser
In-Reply-To: <1139930045.408507.151440@g43g2000cwa.googlegroups.com>
References: <1139930045.408507.151440@g43g2000cwa.googlegroups.com>
Message-ID: <43f1fa4a$0$4780$636a55ce@news.free.fr>

rodmc wrote:
> Is it possible to embed a Python application within Internet explorer?

No. Nor in any other browser (except from Grail, but I think this
doesn't count).

> If so how do people recommend going about it.

Either write a rich client app or a real web application.

> As for the application it has to be able display simple animated
> graphics such as circles, lines and squares. 

Wait... Aren't there already existing technos to do this ?

> However if someone clicks
> on a shape it should open up another application, such as Word.

Lol. This would be a really big bad security issue.

You definitively want to write a rich client app.

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From rtilley at vt.edu  Wed Feb 15 13:48:00 2006
From: rtilley at vt.edu (rtilley)
Date: Wed, 15 Feb 2006 13:48:00 -0500
Subject: %SystemDrive%
Message-ID: <dsvt14$rev$1@solaris.cc.vt.edu>

Is there a proper way to get this variable from Windows? I know it's in 
the registry, but I'd rather not go there. I could not find a CSIDL 
shell constant for it either. I've been doing this:

os.chdir('/')
sys_drive = os.getcwd()
print sys_drive
C:\

This seems too much of a hack and maybe not 100% right all of the time. 
How could it be done better?


From peter at engcorp.com  Thu Feb  9 19:13:55 2006
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 09 Feb 2006 19:13:55 -0500
Subject: re.match versus re.findall
In-Reply-To: <1139524468.861442.146240@g44g2000cwa.googlegroups.com>
References: <1139524468.861442.146240@g44g2000cwa.googlegroups.com>
Message-ID: <dsglrm$r16$1@sea.gmane.org>

JerryB wrote:
> I have a string like this:
> 
> invalidStr = "192.168.*.1"
> 
> I want to be sure I don't get a * followed by a number, i.e. I want
> invalidStr to be invalid. So I do:
> 
> numberAfterStar = re.compile(r'\*.*\d')
> 
> Now, here's the fun:
> 
> If I run:
> if numberAfterStar.findall(invalidStr):
>     print "Found it with findall!"
> 
> it prints, if I run:
> 
> if numberAfterStar.match(invalidStr):
>     print "Found it with match!"
> 
> it doesn't.
> Why does findall finds a match it but match doesn't?

This might help:

 >>> numberAfterStar.findall(invalidStr)
['*.1']
 >>> numberAfterStar.match(invalidStr)
 >>> numberAfterStar.search(invalidStr)
<_sre.SRE_Match object at 0x00AF3DB0>

Check the docs on match, specifically where it talks about when you 
should use search() instead... (http://docs.python.org/lib/re-objects.html)

(By the way, thank you for the excellently crafted post.  I wish 
everyone who asked questions here took the time to prepare as thoroughly 
and include the actual failing code, etc...)

-Peter



From edreamleo at charter.net  Sat Feb 11 10:27:41 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Sat, 11 Feb 2006 09:27:41 -0600
Subject: How to invoke a tkinter menu *itself*
References: <W51Hf.36$Y42.9@fe07.lga>
Message-ID: <PnnHf.42$rV6.6@fe04.lga>

> I've spent a pleasant hour or so trying to bring up a top-level Tk menu at 
> the same spot as it would appear if I had actually clicked the menu.  That 
> is, I want to bring up a menu from the keyboard.

I'm going to investigate how to locate the 'button' that forms the anchor 
for the menu.  This button *is* (or should be) packed (or placed), so it 
should know its own location.

Anyone know how to do find a menu's button?

Edward
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
-------------------------------------------------------------------- 




From chasonh at hotmail.com  Wed Feb  8 00:11:28 2006
From: chasonh at hotmail.com (Chason Hayes)
Date: Wed, 08 Feb 2006 05:11:28 GMT
Subject: Literal Escaped Octets
References: <pan.2006.02.06.04.50.15.325558@hotmail.com>
	<mailman.1495.1139233969.27775.python-list@python.org>
	<pan.2006.02.06.16.57.13.359336@hotmail.com>
	<mailman.1532.1139277512.27775.python-list@python.org>
Message-ID: <pan.2006.02.08.02.34.06.750887@hotmail.com>

On Tue, 07 Feb 2006 01:58:00 +0000, Steve Holden wrote:

> Chason Hayes wrote:
>> On Mon, 06 Feb 2006 13:39:17 +0000, Steve Holden wrote:
> [...]
>>>
>>>The URL you reference is discussing how you represent arbitrary values 
>>>in string literals. If you already have the data in a Python string the 
>>>best advise is to use a parameterized query - that way your Python DB 
>>>API module will do the escaping for you!
>>>
>>>regards
>>>  Steve
>> 
>> 
>> Thanks for the input. I tried that with a format string and a
>> dictionary, but I still received a database error indicating illegal
>> string values. This error went away completely when I used a test file
>> consisting only of text, but reproduced everytime with a true binary file.
>> If you can let me know where I am wrong or show me a code snippet with a
>> sql insert that contains a variable with raw binary data that works,
>> I would greatly appreciate it.
>> 
> I tried and my experience was exactly the same, which made me think less 
> of PostgreSQL.
> 
> They don't seem to implement the SQL BLOB type properly, so it looks as 
> though that rebarbative syntax with all the backslashes is necessary. Sorry.
> 
> regards
>   Steve

with regards to escaping data parameters I have found that I have to
specifically add quotes to my strings for them to be understood by
pstgresql. For example

ifs=open("binarydatafile","r")
binarydata=ifs.read()
stringdata=base64.encodestring(binarydata)

#does not work
cursor.execute("insert into binarytable values(%s)" % stringdata)

#need to do this first
newstringdata = "'" + stringdata + "'"

then the select statment works.
Is this expected behavior? Is there a better way of doing this?

thanks for any insight
Chason




From crutcher at gmail.com  Sun Feb 26 14:20:39 2006
From: crutcher at gmail.com (Crutcher)
Date: 26 Feb 2006 11:20:39 -0800
Subject: Tail Call Optimization as a Decorator
Message-ID: <1140981639.315995.34860@i39g2000cwa.googlegroups.com>

This is fun :)
{Note: I take no responsibilty for anyone who uses this in production
code}

#!/usr/bin/env python2.4
# This program shows off a python decorator
# which implements tail call optimization. It
# does this by throwing an exception if it is
# it's own grandparent, and catching such
# exceptions to recall the stack.

import sys

class TailRecurseException:
  def __init__(self, args, kwargs):
    self.args = args
    self.kwargs = kwargs

def tail_call_optimized(g):
  """
  This function decorates a function with tail call
  optimization. It does this by throwing an exception
  if it is it's own grandparent, and catching such
  exceptions to fake the tail call optimization.

  This function fails if (and only if) the decorated
  function recurses in a non-tail context.
  """
  def func(*args, **kwargs):
    f = sys._getframe()
    if f.f_back and f.f_back.f_back \
        and f.f_back.f_back.f_code == f.f_code:
      raise TailRecurseException(args, kwargs)
    else:
      while 1:
        try:
          return g(*args, **kwargs)
        except TailRecurseException, e:
          args = e.args
          kwargs = e.kwargs
  func.__doc__ = g.__doc__
  return func

@tail_call_optimized
def factorial(n, acc=1):
  "calculate a factorial"
  if n == 0:
    return acc
  return factorial(n-1, n*acc)

print factorial(10000)
# prints a big, big number,
# but doesn't hit the recursion limit.

@tail_call_optimized
def fib(i, current = 0, next = 1):
  if i == 0:
    return current
  else:
    return fib(i - 1, next, current + next)

print fib(10000)
# also prints a big number,
# but doesn't hit the recursion limit.



From erniedude at gmail.com  Tue Feb  7 18:30:32 2006
From: erniedude at gmail.com (Ernesto)
Date: 7 Feb 2006 15:30:32 -0800
Subject: tricky regular expressions
In-Reply-To: <1139351528.999976.205430@g43g2000cwa.googlegroups.com>
References: <1139343779.721205.221410@f14g2000cwb.googlegroups.com>
	<1139351528.999976.205430@g43g2000cwa.googlegroups.com>
Message-ID: <1139355032.160544.117110@g43g2000cwa.googlegroups.com>


Petr Jakes wrote:

> PS: just wonder why are you asking the same question in two different
> topics....

Thanks for the help Peter.  That happened accidentally.  I meant to
only put that in python topic.  Aplogies...



From odd_raisin at REMOVEME.operamail.com  Sat Feb 25 19:45:41 2006
From: odd_raisin at REMOVEME.operamail.com (Ian Roddis)
Date: Sun, 26 Feb 2006 00:45:41 GMT
Subject: xslt queries in xml to SQL queries
Message-ID: <VS6Mf.7461$vC4.7447@clgrps12>


Hello,

  I want to embed SQL type queries within an XML data record. The XML
looks something like this:
<DISPLAYPAGE>
	<FIELD NAME="SERVER" TYPE="DROPDOWN">
		<OPTION>1<OPTION>
		<OPTION>2<OPTION>
		<OPTION>3<OPTION>
	</FIELD>
</DISPLAYPAGE>

  I want to populate the drop down options from a database. The table
looks like this (example):
CREATE TABLE options_table (
	id		int primary key,
	name	varchar(255),
	field		varchar(255)
)


  I read an article that would allow me to embed an SQL query using XSLT
like this (in place of <OPTIONS>):
<xslt:template match="options_table[field='SERVER']">
	<OPTION><xslt:value-of select="name/text()"/></OPTION>
</xslt:template>
		
  Which would be equivalent of:

SELECT name FROM options_table WHERE field='SERVER';

  Does anyone else have experience of describing SQL queries in XML or
parsing XSLT in python?
-- 
To mail remove REMOVEME. from address.



From ivoras at __yahoo__.com_  Sat Feb  4 18:14:25 2006
From: ivoras at __yahoo__.com_ (Ivan Voras)
Date: Sun, 05 Feb 2006 00:14:25 +0100
Subject: would it be feasable to write python DJing software
In-Reply-To: <mailman.1380.1138967196.27775.python-list@python.org>
References: <1138925819.465108.181760@o13g2000cwo.googlegroups.com><druc1r$cre$1@bagan.srce.hr><1138962918.427815.70300@g14g2000cwa.googlegroups.com><drvdq6$gjq$1@bagan.srce.hr><1138966084.385205.254410@g14g2000cwa.googlegroups.com>	<drvf4m$t79$1@bagan.srce.hr>
	<mailman.1380.1138967196.27775.python-list@python.org>
Message-ID: <ds3cgf$r61$1@bagan.srce.hr>

Fredrik Lundh wrote:

> 
> uhuh?  so why did you just argue that
> 
>     if foo.bar():
>         bar.aba()
> 
> means "doing it in C" if bar and aba happens to be parts of an extension
> library ?

Because "bar and aba happen to be parts of extension library" :)


From "jay\" at (none)  Sat Feb 25 11:13:41 2006
From: "jay\" at (none) (none)
Date: Sat, 25 Feb 2006 09:13:41 -0700
Subject: Problem with Property
In-Reply-To: <95079633.aiQev8x7lQ@news.perlig.de>
References: <TsydnRFxOJsBw53ZnZ2dnUVZ_tqdnZ2d@comcast.com>
	<95079633.aiQev8x7lQ@news.perlig.de>
Message-ID: <ccKdna1OndyR-53ZnZ2dnUVZ_vydnZ2d@comcast.com>

Andr? Malo wrote:
> * none wrote:
> 
> 
>>classMyObject:
> 
> [...]
> 
> 
>>As you can see, the _getProperty() method gets called properly when I do
>>  'o.value'  but 'o.value = 123' does not seem to use the property
>>stucture.   I can't figure out why 'o.value=123' does not call
>>_setProperty()
>>
>>Any ideas?
> 
> 
> property only works as intended with new style classes.

duh.. I changed that to
	class MyObject(object):
and it worked fine

Thanks

Take care,
Jay


From http  Thu Feb 16 11:17:23 2006
From: http (Paul Rubin)
Date: 16 Feb 2006 08:17:23 -0800
Subject: pythonic way of 'b = list(a); b.append(4)"
References: <1140105883.069632.262530@g43g2000cwa.googlegroups.com>
Message-ID: <7xhd6zjn1o.fsf@ruckus.brouhaha.com>

"szabi" <szabolcs.berecz at gmail.com> writes:
> I have a list of three values and want to call a function with four
> parameters. I would like
> to write something like:
> 
> a = [1, 2, 3]
> f(*a, 4)

f(*a+[4]) seems to work.


From a.schmolck at gmail.com  Wed Feb 22 12:34:54 2006
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: 22 Feb 2006 17:34:54 +0000
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<yfspsljp321.fsf@oc.ex.ac.uk>
	<1140425017.101462.117380@g47g2000cwa.googlegroups.com>
	<yfslkw5msih.fsf@oc.ex.ac.uk>
	<1140622216.436013.234400@g47g2000cwa.googlegroups.com>
Message-ID: <yfsaccjl2kh.fsf@oc.ex.ac.uk>

"Michele Simionato" <michele.simionato at gmail.com> writes:

> I replied to this message yesterday, but it did not appear, so let's
> try again.
> 
> I agree with your points, but I would not say that Lisp is
> intrinsically more dynamic than Python as a language;

Neither would I -- I don't think either is obviously more dynamic than the
other.

But since it has been implied that python's comparatively poor performance is
simply due to it being more dynamic than other languages, I wanted to point
out that one could with just as much justification claim CL to be more dynamic
than python (it is in some regards, but not in others -- how to weight them to
achieve some overall "score" is not obvious. I really doubt that python will
ever come remotely close to the level of dynamism that now defunct lispmachine
technology achieved, though).

> it is just more interactive and has more features (and more complexities
> too).

Indeed -- CL is much more complex than python and has many, many more warts.

As for common lisp being "just more interactive" -- all things being equal I
fail to see how "more interactive" cannot imply more dynamic -- IMO it doesn't
get much more dynamic than changing and inspecting things interactively. Also
not all the ways in which CL is more dynamic represent features that increase
complexity. For example in CL you could just write

  def foo(x, l=[], N=len(l)): [...]

and have it work as expected because defaults are evaluated on call (this is
one of the very rare occassions of an obvious design wart in python, IMO).

In other cases, of course, more dynamism seems to involve added complexity.
For example CL has sane (dynamically scoped) global variables (and local ones,
if you declare them "special"). I think python is somewhat broken in this
regard, but I must admit I have no idea how to implement dynamically scoped
variables simply and "pythonically", so I wouldn't call it an obvious design
flaw.

> BTW, regarding your first point on interactive sessions, are you aware
> of Michael Hudson's recipe
> "automatically upgrade class instances on reload()"
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/160164 ?

Thanks, it's nice to be aware of other solutions, I'll have a closer look at
some point. I've of course also written my own code for that purpose -- apart
from ipython.el and a couple of private utilities I even got sufficiently
pissed off by bugs introduced by python's poor support for serious interactive
work that I started writing some sort of versioned module system that kept
track of what was being imported from where to where, but I ran out of time
and ultimately for this and unrelated reasons switched to matlab in this
particular case.

Matlab sucks in countless ways, but it gives a superior interactive
environment. If you do experimental work where state is expensive to recompute
from scratch but where you need to tune various parameters to obtain the
desired results, problems introduced by changes not properly propagating are
very, very irritating -- especially if you want to keep a record of what changes
effected what, so that your experiments are repeatable.

'as


From dylan.moreland at gmail.com  Thu Feb  9 20:44:29 2006
From: dylan.moreland at gmail.com (Dylan Moreland)
Date: 9 Feb 2006 17:44:29 -0800
Subject: Newbie Q: dynamically assigning object attribute
In-Reply-To: <1139535715.486234.195690@g44g2000cwa.googlegroups.com>
References: <1139535715.486234.195690@g44g2000cwa.googlegroups.com>
Message-ID: <1139535868.984020.204620@g44g2000cwa.googlegroups.com>

Take a look at the built-in function setattr:

http://ftp.python.org/doc/lib/built-in-funcs.html#l2h-64



From claudio.grondi at freenet.de  Mon Feb 13 09:57:12 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Mon, 13 Feb 2006 15:57:12 +0100
Subject: Python equivilant to msgbox()
In-Reply-To: <6WQHf.2700$7C3.2665@trnddc08>
References: <7CQHf.2690$7C3.1780@trnddc08> <43efd40a$1_2@newspeer2.tds.net>
	<6WQHf.2700$7C3.2665@trnddc08>
Message-ID: <dsq6oc$lb8$1@newsreader3.netcologne.de>

LittlePython wrote:
> That is exactly what I was look for .. thx
Surprised to hear that.

As VisualBasic programmer I would expect you to have experience with 
ActiveX on Windows, where the best way to go with Python is to reuse all 
the ActiveX components and their known user interfaces (i.e. constants 
to use as parameter and constants for interpretation of return values) 
directly from within Python.

A message box goes e.g. this way:

 >>> import win32com.client
 >>> axWshShell = win32com.client.Dispatch("WScript.Shell")
 >>> axWshShell.Popup(u"(MsgText)This axWshShell.Popup closes itself 
after 45 seconds", 45, u"(MsgTitle)Testing WScript.Shell object:", 1)

By the way: is there a ready for direct use timed self closing Ok/Cancel 
message box in any of the proposed GUI packages?

Claudio
> 
> 
> "Kent Johnson" <kent at kentsjohnson.com> wrote in message
> news:43efd40a$1_2 at newspeer2.tds.net...
> 
>>LittlePython wrote:
>>
>>>Is there an equivalent to a msgbox() or wscript.echo (via wcsript) . I
>>>would like to call this instead of print (to the screen) . I would like
>>>to write a simple script that is not an event drive gui but calls input
>>>boxes, message boxes, or maybe even a file open browser box as well?
>>
>>Take a look at EasyGUI:
>>http://www.ferg.org/easygui/
>>
>>Kent
> 
> 
> 


From wietse.j at gmail.com  Fri Feb 10 20:57:55 2006
From: wietse.j at gmail.com (wietse)
Date: 10 Feb 2006 17:57:55 -0800
Subject: equivalent functions?
In-Reply-To: <1139622470.638044.158410@o13g2000cwo.googlegroups.com>
References: <1139621457.141754.228880@f14g2000cwb.googlegroups.com>
	<1139622470.638044.158410@o13g2000cwo.googlegroups.com>
Message-ID: <1139623075.748208.16900@g47g2000cwa.googlegroups.com>

Got it! Thanks for your time.



From juho.schultz at helsinki.fi  Thu Feb  9 07:16:37 2006
From: juho.schultz at helsinki.fi (Juho Schultz)
Date: Thu, 09 Feb 2006 14:16:37 +0200
Subject: line wrapping problem
In-Reply-To: <1139484488.037165.106170@g43g2000cwa.googlegroups.com>
References: <1139484488.037165.106170@g43g2000cwa.googlegroups.com>
Message-ID: <dsfbr4$426$1@oravannahka.helsinki.fi>

S Borg wrote:
> Hello,
> 
>  I am parsing text from one document to another. I have a scheme
> similar to:
> 
>  for x in myfoobar:
>    print >> mytextfile, "%s    " % mydictionary[x],   #all on same line
>  print >> mytextfile, '\n'      #new line
> 
> 
> I am getting line breaks before my explicit line break. Am I
> unwittingly copying '\n' characters from the original file?
> How should I fix this(What is the 'Pythonic' solution)?
> 
> thanks,
> -S
> 

mytextfile.write("%s    " % mydictionary[x])

should work. IMO file.write() is self-explanatory but "print >> file" is 
a bit obscure.


From nospam at spamgourmet.com  Wed Feb  1 05:20:04 2006
From: nospam at spamgourmet.com (Christoph Conrad)
Date: Wed, 01 Feb 2006 11:20:04 +0100
Subject: OpenRTS - new OSS Python game
References: <drq0vt$62f$1@orkan.itea.ntnu.no>
	<slrndu128k.8gn.sybrenUSE@schuimige.unrealtower.org>
Message-ID: <ubqxrl6rs.fsf@ID-24456.user.uni-berlin.de>

Hello Sybren,

> To be honest, it looks very much like games from 1995...

You should notice: It's a first alpha version.

Freundliche Gr??e,
 Christoph


From deusfaber at gmail.com  Sun Feb 12 14:44:45 2006
From: deusfaber at gmail.com (dfaber)
Date: 12 Feb 2006 11:44:45 -0800
Subject: python and webcam
Message-ID: <1139773485.698970.195320@z14g2000cwz.googlegroups.com>

Hi,
 I have Logitech webcam and I need to grab images on Fedora Core 4 (not
my favorite distro). Are there any python modules available for doing
this? Any hints or suggestions would be welcome. 

Thanks.



From mensanator at aol.com  Fri Feb 10 14:59:05 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 10 Feb 2006 11:59:05 -0800
Subject: Pulling all n-sized combinations from a list
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>
	<1139509392.890581.94470@g43g2000cwa.googlegroups.com>
	<mailman.1675.1139510184.27775.python-list@python.org>
	<1139513265.440321.184530@o13g2000cwo.googlegroups.com>
	<dsg601$ndh$1@wake.carmen.se>
	<1139527129.367077.316590@g44g2000cwa.googlegroups.com>
	<dshvoq$ksm$1@wake.carmen.se>
Message-ID: <1139601545.595021.201610@g44g2000cwa.googlegroups.com>


Magnus Lycka wrote:
> mensanator at aol.com wrote:
> > But using the free SDK compiler from MS? That seems elusive.
>
> Have you seen this?
> http://www.vrplumber.com/programming/mstoolkit/

I have, although I haven't tried it as I was able to get a GMPY
Windows binary from someone else. It may be that probstat
is not as complicated as GMPY. So if I get some free time,
I might try it, would be worth it in the long run. Thanks for
pointing it out.

Nevertheless, my "elusive" comment was certainly justified:

<quote>
Note also that the author of the document (Mike Fletcher)
has abandoned Windows as a development platform
(in some part because of the difficulties in getting a
working compiler to support the platform), and is thus
no longer actively maintaining this page.  While some
people are still reporting successes, others are having
difficulties with building certain projects.  The Toolkit
approach is, in short, a bit dicey as a platform for serious
development.
</quote>

 I think it's safe to say most Windows users are NOT software
developers. If the professional software developers have trouble
figuring it out, what chance does an inexperienced end user have?

And for the record, I never implied that JD was obligated to provide
a Windows binary for his project. I was merely pointing out that
there are a lot of people not using his module because of the lack
of a Windows binary, so it really should come as no surprise that
people keep asking for solutions to combination/permutation
problems.

But it turns out he actually had one, which he graciously provided
in response to my observation. If I had kept my trap shut, I wouldn't
have it, would I? Squeaky wheels get grease. And, through my
blundering tests, he found a place where he should be raising an
exception, so he benefits also.

Luckily, not everyone has the "here's a nickel kid, get yourself a
better computer" attitude.



From rphillips at engineer.co.summit.oh.us  Wed Feb 15 10:21:58 2006
From: rphillips at engineer.co.summit.oh.us (paron)
Date: 15 Feb 2006 07:21:58 -0800
Subject: Embedding an Application in a Web browser
In-Reply-To: <43f327d8$1_2@newspeer2.tds.net>
References: <1139930045.408507.151440@g43g2000cwa.googlegroups.com>
	<1140004056.893486.291280@g44g2000cwa.googlegroups.com>
	<1140005883.379440.138950@z14g2000cwz.googlegroups.com>
	<43f327d8$1_2@newspeer2.tds.net>
Message-ID: <1140016917.961433.95940@f14g2000cwb.googlegroups.com>

Thanks, Kent -- you're right. That'll teach me to work from memory!

Ron



From tim.leeuwvander at nl.unisys.com  Thu Feb  2 11:03:14 2006
From: tim.leeuwvander at nl.unisys.com (Tim N. van der Leeuw)
Date: 2 Feb 2006 08:03:14 -0800
Subject: Detecting filename-encoding (on WinXP)?
Message-ID: <1138896194.914220.60080@o13g2000cwo.googlegroups.com>

Hi,

I have a need to store directory and filenames in a database. For the
database I chose to use UTF-8 encoding; but the actual encoding used is
probably immaterial: whichever coding I take, I'll run into this issue
eventually.

At first my code worked until I ran into a directory full of Cyrillic
characters and my program blew up.

So now what I need to know is, how do I find out in what encoding a
particular filename is? Is there a portable way for doing this? And if
not, then what is the non-portable way for doing this on Windows?
(WinXP)
(If there's only a non-portable way then I'll worry about porting it
later, if and when this program will ever have a need to run on a
Unix-like environment)


Many thanks in advance,

--Tim



From http  Fri Feb 10 22:09:22 2006
From: http (Paul Rubin)
Date: 10 Feb 2006 19:09:22 -0800
Subject: Socket Programming - Question
References: <1139616664.208516.254900@f14g2000cwb.googlegroups.com>
Message-ID: <7xmzgyegm5.fsf@ruckus.brouhaha.com>

"duncanm255 at hotmail.com" <duncanm255 at hotmail.com> writes:
> I am relatively new to Python, and wanted to see if this is even
> possible, and if so how to go about implementing it.  What I'm looking
> to do is create a client/server application that does the following:
> 
> 1)  System2 listens on port > 1023
> 2)  System1 connects to System2 and sends traffic to it - based on the
> traffic it receives (i.e. a special string), System2 executes
> command-line commands and returns the output to System1.

You're asking how to write a TCP server in general.  You might look at
the SocketServer module in the standard library, which gives a
reasonable framework for that kind of server.  However, its
documentation is not very good.  Alex Martelli's "Python Cookbook" may
have some better examples.  

If you want your server to be able to handle multiple client sessions
simultaneously, use SocketServer.ThreadingMixin (for multiple threads)
or SocketServer.ForkingMixin (multiple processes).  Beware that this
stuff is not easy for beginners, unless you've had experience writing
servers in other languages (maybe Java).

There's another issue too, especially if your app is a virus scanner:
you have to think very hard about what happens if a malicious client
connects to your server (a virus scanning app is an unusually juicy
target for such attacks).  It's extremely easy to leave security holes
open (the viruses themselves typically exploit such holes in Windows)
so you have to develop a paranoid attitude about what kinds of things
the attacker can try and how you can defend.  Using Python puts you
one step ahead of Windows, since you're mostly immune to buffer
overflow bugs, a very common vulnerability.  But it's still an area
full of hazards and not so good for beginners.

This is good bedtime reading: http://www.dwheeler.com/secure-programs/


From webraviteja at gmail.com  Fri Feb 17 05:07:57 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 17 Feb 2006 02:07:57 -0800
Subject: Is there anything like ASP.NET for Python web apps ?
In-Reply-To: <pb6bv112sg78j19eeffoblqo0l0ejh8k0o@4ax.com>
References: <pb6bv112sg78j19eeffoblqo0l0ejh8k0o@4ax.com>
Message-ID: <1140170876.998135.227220@z14g2000cwz.googlegroups.com>

If what you want is a web IDE that supports visual development, no
standalone Python IDE has such support. But you can use Python in IDEs
that do support these features.

1.) ActiveGrid (http://www.activegrid.com/) - closest visual web IDE
where Python is a first class member.
2.) Use ASP.NET with Boo or IronPython. Not seamless IDE-wise.
3.) Wait for Coyote to finish (https://coyote.dev.java.net/). It is
still J2EE but you get to use Python. Netbeans, unlike JDev does not
have data bound widgets available.



From bokr at oz.net  Sun Feb 12 14:27:51 2006
From: bokr at oz.net (Bengt Richter)
Date: Sun, 12 Feb 2006 19:27:51 GMT
Subject: Too Many if Statements?
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>	<6e2iu1hdb8fvlfkcuulloiiq1khlbhret1@4ax.com>	<1139517959.741090.28560@g14g2000cwa.googlegroups.com>	<dshvb4$jfn$1@wake.carmen.se><1139583025.428875.225500@g14g2000cwa.googlegroups.com>
	<dsid2f$b99$1@sea.gmane.org>
	<mailman.1763.1139690497.27775.python-list@python.org>
Message-ID: <43ef747d.618493827@news.oz.net>

On Sat, 11 Feb 2006 15:40:49 -0500, "Terry Reedy" <tjreedy at udel.edu> wrote:

>
>"Steve Holden" <steve at holdenweb.com> wrote in message 
>news:dsid2f$b99$1 at sea.gmane.org...
>> Clearly it would be a good idea to remove whatever problem is causing
>> the error,
>
>The problem (see my post of the com_backpatch code) is writing a compound 
>statement (here a for loop) with a body so large as to require a jump of 
>more than 64K bytes in the compiled bytecode (ie, from the test at the top 
>of the loop to the code that follows after the loop).  Until the jump limit 
>is raised (likely a long wait ;-), the OP must factor some of the code out 
>of the loop.
>
Easy example:

 >>> def test(n):
 ...     while True:
 ...         try: co = compile('if x:\n'+ n*' a=1\n','','exec')
 ...         except Exception,e: break
 ...         n += 1
 ...     print 'Stopped at n=%s due to %s: %s'%(n, e.__class__.__name__,e)
 ...

get an idea of where to start that:

 >>> import dis
 >>> n=3
 >>> dis.dis(          compile('if x:\n'+ n*' a=1\n','','exec'))
   1           0 LOAD_NAME                0 (x)
               3 JUMP_IF_FALSE           22 (to 28)
               6 POP_TOP

   2           7 LOAD_CONST               0 (1)
              10 STORE_NAME               1 (a)

   3          13 LOAD_CONST               0 (1)
              16 STORE_NAME               1 (a)

   4          19 LOAD_CONST               0 (1)
              22 STORE_NAME               1 (a)
              25 JUMP_FORWARD             1 (to 29)
         >>   28 POP_TOP
         >>   29 LOAD_CONST               1 (None)
              32 RETURN_VALUE
 >>> (2**16-7)/(13-7)
 10921

back off 1

 >>> test(10920)
 Stopped at n=10922 due to SystemError: com_backpatch: offset too large

Decided to test the exact 65536 jump with code chunks of 16 byte-codes and one
chunk at the end to make 16 with the last JUMP_FORWARD.

 >>> n=4095
 >>> dis.dis(          compile('if x:\n'+ n*' a=1+2,4  \n'+' x=0,x','','exec'))
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
 SystemError: com_backpatch: offset too large
 >>> n=4094
 >>> dis.dis(          compile('if x:\n'+ n*' a=1+2,4  \n'+' x=0,x','','exec'))
   1           0 LOAD_NAME                0 (x)
               3 JUMP_IF_FALSE        65520 (to 65526)
               6 POP_TOP

   2           7 LOAD_CONST               0 (1)
              10 LOAD_CONST               1 (2)
              13 BINARY_ADD
              14 LOAD_CONST               2 (4)
              17 BUILD_TUPLE              2
              20 STORE_NAME               1 (a)

   3          23 LOAD_CONST               0 (1)

So the corner case of 2**16 is ok. Believe it or not, I once discovered a compiler
error based on optimizing a 2**16-involving loop condition as if it were 0 and the
loop didn't execute! IIRC, I bumped into it processing an array of records with a stride of
exactly 2**n and it thought it could calculate a 16-bit number of strides for end of loop.
No good for arraysize/stridesize==2**16 ;-)

If the OP really HAD to, he could always (untested) break

    if cond:
        too
        large
    else:
        two
        large,also
into
    if cond:
        too
    else:
        two
    if cond:
        large
    else:
        large,also

but that reads gawdawfully. (So, I imagine, does about any code hitting the offset limit ;-)

If it's a matter of too many elifs, the OP could break that more readably, e.g. (untested)

    done=True
    if cond:
       bla
    elif c2:
       bla 2
    ...
    elif c456:
       bla456
    else:
        done=False

    more, done = not done,True
    if more and c457:
        bla c457
    elif c458:
        bla458
    ...
    elif c1012:
        bla1012
    else:
        done = False

    more, done = not done,True
    ... etc

But the OP should find another approach I think,
because this is still disgusting code ;-)

Regards,
Bengt Richter


From zzhikang at hotmail.com  Tue Feb 21 22:23:00 2006
From: zzhikang at hotmail.com (kanchy kang)
Date: Wed, 22 Feb 2006 03:23:00 +0000
Subject: May i customize basic operator (such as 1==3)?
Message-ID: <BAY108-F748E4BBD0226699564AA8CDFD0@phx.gbl>

Hi,all
as we know, we can override the operator of one object(for example __eq__).
my question is, how to override the basic operator?
for example,

for any object comparison operator(including litterals),
for example,
a = "123"
b = "321"

the boolean equation a == b,
i need override "==" operator like this:
first display a and b

then return real boolean result (a == b).

thanks!


-----------------------------------------------
Best regards,
kangzz

mailto:zzhikang at hotmail.com
Tel : 021-65407754
MP: 13916928084

_________________________________________________________________
Express yourself instantly with MSN Messenger! Download today - it's FREE! 
http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/



From iddw at hotmail.com  Mon Feb 13 16:27:21 2006
From: iddw at hotmail.com (Dave Hansen)
Date: Mon, 13 Feb 2006 15:27:21 -0600
Subject: how do you pronounce 'tuple'?
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<mailman.1806.1139805039.27775.python-list@python.org>
Message-ID: <0mt1v15ei7tg1mr0oclo703b6c92jr9vb4@4ax.com>

On Sun, 12 Feb 2006 23:30:25 -0500 in comp.lang.python, Steve Holden
<steve at holdenweb.com> wrote:

>John Salerno wrote:
[...]
>
>> I know it comes from the suffix -tuple, which makes me think it's 
>> pronounced as 'toople', but I've seen (at m-w.com) that the first 
>> pronunciation option is 'tuhple', so I wasn't sure. Maybe it's both, but 
>> which is most prevalent?
[...]
>"Tyoople", "toople" or "tupple" depending on who you are, where you grew 
>up and who you are speaking to. As with so many Usenet questions, 
>there's no right answer, only 314 wrong ones :-)

FWIW, I've often heard the latter two, but never the first one.
"Tuple" by itself tends to be "toople," but as a suffix tends to be
"tupple."

>
>I teach on both sides of the Atlantic, and have learned to draw a mental 
>breath before trying to pronounce the word "router". Americans find the 
>British pronunciation ("rooter") hilarious, despite the fact they tell 

Probably a cultural reference to "Roto-Rooter," a nationwide plumbing
company specializing in cleaning (ostensibly tree and other plant
roots, though often more, uh, prozaic materials), from sewer drains.
"Call Roto-Rooter, that's the name, and away go troubles down the
drain."

>me I drive on "Root 66" to get to DC. The Brits are politer, and only 
>snigger behind my back when I pronounce it as Americans do, to rhyme 
>with "outer".

I've seen "route" pronounced "rout" or "root" depending on the
background and mood of the speaker, though in this part of the country
("midwest", though "middle" might be more accurate) the former
pronunciation is far more common.  Through the sugestive power of
television, however, I suspect nearly every American would speak of
"root 66" even though the next sentence might reference "rout 12."

On NPR ([American] National Public Radio), there's a weekly music
program called "American Routes" pronounced such to conjure the
alternate "American Roots."

Regards,
                                        -=Dave

-- 
Change is inevitable, progress is not.


From bonono at gmail.com  Mon Feb 13 00:44:44 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 12 Feb 2006 21:44:44 -0800
Subject: Is python very slow compared to C
In-Reply-To: <43F01749.2000601@REMOVEMEcyber.com.au>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
	<1139754010.067582.214830@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>
	<mailman.1785.1139762698.27775.python-list@python.org>
	<pan.2006.02.12.17.18.50.356928@REMOVETHIScyber.com.au>
	<1139793721.739325.235780@z14g2000cwz.googlegroups.com>
	<43F01749.2000601@REMOVEMEcyber.com.au>
Message-ID: <1139809484.447810.17000@g44g2000cwa.googlegroups.com>


Steven D'Aprano wrote:
> bonono at gmail.com wrote:
>
> > I can speak the same about Python if I view it from a prototype based
> > perspective, where one get them for free in Lua but need to implement
> > them in Python.
>
> Sure. And if you need prototypes, then all else being
> equal that would be a disadvantage of Python compared
> to Lua.
>
> On the other hand, I'd suggest that far more
> programmers are familiar with classes than prototypes,
> regardless of any objective advantages or disadvantages
> of one over the other. Perhaps that's one of the
> reasons why Lua is lacking the market penetration of
> Python: programmers may look at it and say "No classes?
> Prototyping? WTF is that? I don't have time to learn
> something so different, better stick to languages which
> have a smaller learning curve."

The "=" operator in Python is also quite different from many language
people had experience like C or VB etc. And using the same argument,
everyone may still be programming in COBOL now.

And if we use market penetration as measure, Perl seems to be easier
for people ?



From robert.kern at gmail.com  Thu Feb 16 22:27:56 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 16 Feb 2006 21:27:56 -0600
Subject: calculating on matrix indices
In-Reply-To: <43F5388A.7010905@bryant.edu>
References: <mailman.2027.1140133353.27775.python-list@python.org>
	<aI8Jf.42165$T35.666013@news20.bellglobal.com>
	<43F5388A.7010905@bryant.edu>
Message-ID: <dt3fru$3k0$1@sea.gmane.org>

Brian Blais wrote:
> Colin J. Williams wrote:
> 
>> Brian Blais wrote:
>>
>>> In my attempt to learn python, migrating from matlab, I have the
>>> following problem. Here is what I want to do, (with the wrong syntax):
>>>
>>> from numpy import *
>>>
>>> t=arange(0,20,.1)
>>> x=zeros(len(t),'f')
>>>
>>> idx=(t>5)                # <---this produces a Boolean array,
>>> probably not what you want.
>>> tau=5
>>> x[idx]=exp(-t[idx]/tau)  # <---this line is wrong (gives a TypeError)
>>>
>> What are you trying to do?  It is most unlikely that you need Boolean
>> values in x[idx]

[Apologies for piggybacking.]

Boolean arrays are perfectly valid indices and do exactly what the OP wants.

In [25]: t[idx]
Out[25]:
array([  5.1,   5.2,   5.3,   5.4,   5.5,   5.6,   5.7,   5.8,   5.9,
         6. ,   6.1,   6.2,   6.3,   6.4,   6.5,   6.6,   6.7,   6.8,
         6.9,   7. ,   7.1,   7.2,   7.3,   7.4,   7.5,   7.6,   7.7,
         7.8,   7.9,   8. ,   8.1,   8.2,   8.3,   8.4,   8.5,   8.6,
         8.7,   8.8,   8.9,   9. ,   9.1,   9.2,   9.3,   9.4,   9.5,
...

In [28]: (t[idx] == compress(idx, t)).all()
Out[28]: True

When used as indices, Boolean arrays are treated as arrays of Boolean values,
not 0s and 1s. Arrays of 0s and 1s used as indices would get the first and
second values of an array, respectively, as I think you were expecting.

In [35]: t[idx.astype(int)]
Out[35]:
array([ 0. ,  0. ,  0. ,  0. ,  0. ,  0. ,  0. ,  0. ,  0. ,  0. ,  0. ,
        0. ,  0. ,  0. ,  0. ,  0. ,  0. ,  0. ,  0. ,  0. ,  0. ,  0. ,
        0. ,  0. ,  0. ,  0. ,  0. ,  0. ,  0. ,  0. ,  0. ,  0. ,  0. ,
        0. ,  0. ,  0. ,  0. ,  0. ,  0. ,  0. ,  0. ,  0. ,  0. ,  0. ,
        0. ,  0. ,  0. ,  0. ,  0. ,  0. ,  0. ,  0.1,  0.1,  0.1,  0.1,
        0.1,  0.1,  0.1,  0.1,  0.1,  0.1,  0.1,  0.1,  0.1,  0.1,  0.1,
 ...

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From tjreedy at udel.edu  Mon Feb 20 17:04:25 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 20 Feb 2006 17:04:25 -0500
Subject: why does close() fail miserably on popen with exit code -1 ?!
References: <1140416836.030294.289800@f14g2000cwb.googlegroups.com><jh8jv1tnj7pde63bomimldoh9me6io9a63@4ax.com>
	<1140465047.381586.224530@g47g2000cwa.googlegroups.com>
Message-ID: <dtdedj$i3p$1@sea.gmane.org>


"Atanas Banov" <enterr at gmail.com> wrote in message 
news:1140465047.381586.224530 at g47g2000cwa.googlegroups.com...
>
> my gripe is about exit with MINUS ONE, not +1. see my post again.

FWIW, I reproduced the error message for -1 (and the no error for -2, -3) 
in the Idle Python Shell uder Win XP home.

tjr





From nszabolcs at gmail.com  Thu Feb 16 03:11:41 2006
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 16 Feb 2006 00:11:41 -0800
Subject: How to run shell commands within python
In-Reply-To: <1140074866.157972.214920@o13g2000cwo.googlegroups.com>
References: <1140074469.258382.24620@f14g2000cwb.googlegroups.com>
	<dt19cr$otl$1@oravannahka.helsinki.fi>
	<1140074866.157972.214920@o13g2000cwo.googlegroups.com>
Message-ID: <1140077501.889615.3520@o13g2000cwo.googlegroups.com>

use subprocess module

from subprocess import call
call(['cmd', 'arg1', 'arg2'], stdin='...', stdout='...')
eg:
call(['ls', '-l'])



From max at alcyone.com  Sun Feb 19 23:33:28 2006
From: max at alcyone.com (Erik Max Francis)
Date: Sun, 19 Feb 2006 20:33:28 -0800
Subject: number ranges (was Re: Matlab page on scipy wiki)
In-Reply-To: <gfmdnZrrLeHK22TenZ2dnUVZ_tCdnZ2d@comcast.com>
References: <e86a5fd00602131854s73191cbbu742d4434ad074908@mail.gmail.com>
	<1139945386.3346.38.camel@pc1.cole.uklinux.net>
	<43F8D881.5030804@sympatico.ca>
	<gfmdnZrrLeHK22TenZ2dnUVZ_tCdnZ2d@comcast.com>
Message-ID: <m9KdnZz309MF22TenZ2dnUVZ_v6dnZ2d@speakeasy.net>

John Zenger wrote:

> I strongly agree that Python should promote range or xrange to syntax. 
> I favor [0..10] rather than [0:10] because 0..10 is inherently easier to 
> understand.  Every maths text I have read uses the ".." notation to show 
> ranges; 

Math texts typically use a normal ellipsis "..." to indicate any sort of 
repeated pattern.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   To know oneself, one should assert oneself.
   -- Albert Camus


From diffuser78 at gmail.com  Sun Feb 12 11:06:34 2006
From: diffuser78 at gmail.com (diffuser78 at gmail.com)
Date: 12 Feb 2006 08:06:34 -0800
Subject: Is python very slow compared to C
In-Reply-To: <1139759006.250258.311840@g44g2000cwa.googlegroups.com>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
	<1139754010.067582.214830@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>
	<1139759006.250258.311840@g44g2000cwa.googlegroups.com>
Message-ID: <1139760394.725258.77520@g44g2000cwa.googlegroups.com>

Thnaks everybody for their comments. I am an average programmer in C
and wanted to make a hop to python and was just trying to clear my mind
with the confusions. Bit I guess I will go ahead and spend some time
with python and do my next project in python.


thanks for the feedback



From law_order_3 at hotmail.com  Thu Feb 16 09:14:58 2006
From: law_order_3 at hotmail.com (asdsd sir)
Date: Thu, 16 Feb 2006 14:14:58 +0000
Subject: Some general questions about using "stdin","stdout"....
Message-ID: <BAY12-F8EAB7B87DF62D425E9EC5E8FB0@phx.gbl>

Hi!I'm new in Python and i'd like to ask some general questions about 
stdin,stdout...

Firstly...

if we type like something like :
   cat "file.txt"|python somefile.py

#somefile.py
    import sys
     text=sys.stdin.read()


...then "sys.stdin.read()" will read from "cat"s stdout...
However,if i type inside a program,something like....

#someprog.py
    import sys
   print "hello"|sys.stdin.read()

.....the screen hangs..why is that?isn't the same situation as "cat"?

in addition to this...
Why can't i "write" to the stdin?
Isn't it being used as a file object like all the others?
for example
sys.stdin.close() or
open('sys.stdin','w+') or
sys.stdin.write("something") etc... don't work...

At last,let's consider "sys.stdin.read(3)"
If i type that,the program "waits" for me to type some characters,and then 
prints the first three...
However,doesn't this action actually include a "writing" to stdin and  then 
a "reading" from that?

I'm really confused...
Any help would be highly appreciated...
Thanks a lot.

_________________________________________________________________
Free blogging with MSN Spaces  http://spaces.msn.com/?mkt=nl-be



From scott.daniels at acm.org  Tue Feb  7 18:19:37 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Tue, 07 Feb 2006 15:19:37 -0800
Subject: Hi reliability files, writing,reading and maintaining
In-Reply-To: <Y15Gf.280109$D47.254492@fe3.news.blueyonder.co.uk>
References: <Y15Gf.280109$D47.254492@fe3.news.blueyonder.co.uk>
Message-ID: <43e929d9$1@nntp0.pdx.net>

John Pote wrote:
> Hello, help/advice appreciated.
> I am writing some web scripts in python to receive small amounts of data 
> from remote sensors and store the data in a file. 50 to 100 bytes every 5 or 
> 10 minutes. A new file for each day is anticipated.  Of considerable 
> importance is the long term availability of this data and it's gathering and 
> storage without gaps.

This looks to me like the kind of thing a database is designed to
handle.  File systems under many operating systems have a nasty
habit of re-ordering writes for I/O efficiency, and don't necessarily
have the behavior you need for your application.  The "ACID" design
criteria for database design ask that operations on the DB are:
     Atomic
     Consistent
     Independent
     Durable
"Atomic" means that the database always appears as if the "transaction"
has either happened or not; it is not possible for any transaction to
see the DB with any transaction in a semi-completed state.  "Consistent"
says that if you have invariants that are true about the data in the
database, and each transaction preserves the invariants, the database
will always satisfy the invariants.  "Independent" essentially says that
no transaction (such as reading the DB) will be able to tell it is
running in parallel with other transactions (such as reads).  "Durable"
says that, once a transaction has been committed, even pulling the plug
and restarting the DBMS should give a database with those transactions
which got committed there, and no pieces of any other there.

Databases often provide pre-packaged ways to do backups while the DB
is running. These considerations are the core considerations to database
design, so I'd suggest you consider using a DB for your application.

I do note that some of the most modern operating systems are trying
to provide "log-structured file systems," which may help with the
durability of file writes.  I understand there is an attempt even to
provide transactional interactions to the file systems, but I'm not
sure how far down the line that goes.

-- 
-Scott David Daniels
scott.daniels at acm.org


From martin.witte at gmail.com  Fri Feb 17 13:48:58 2006
From: martin.witte at gmail.com (wittempj@hotmail.com)
Date: 17 Feb 2006 10:48:58 -0800
Subject: Terminating a function
In-Reply-To: <mailman.2045.1140174459.27775.python-list@python.org>
References: <mailman.2045.1140174459.27775.python-list@python.org>
Message-ID: <1140202138.781594.11380@f14g2000cwb.googlegroups.com>

This might be all you need:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/473878



From claird at lairds.us  Sun Feb 12 10:08:03 2006
From: claird at lairds.us (Cameron Laird)
Date: Sun, 12 Feb 2006 15:08:03 GMT
Subject: Is python very slow compared to C
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<pan.2006.02.12.01.03.10.918456@REMOVETHIScyber.com.au>
	<1139751088.720150.80010@g43g2000cwa.googlegroups.com>
Message-ID: <ert3c3-dug.ln1@lairds.us>

In article <1139751088.720150.80010 at g43g2000cwa.googlegroups.com>,
Luis M. Gonz?lez <luismgz at gmail.com> wrote:
			.
			.
			.
>> Python helps you write shorter code with fewer bugs, much quicker, than C.
>> If you discover a specific problem that runs too slow in Python, it is
>> possible to write a C extension to solve that specific problem, while
>> still having all the other advantages of Python.
>
>You are right, we all know that, but I think the person who asked this
>question doesn't want to hear a sales pitch. He asked a very specific
>question regarding execution speed.
>

Also, a couple of people have written, "If you want speed, choose
assembler."  With full recognition of all these comments, my spe-
cific response to the question regarding execution speed is, "If
you want speed, Python makes a great choice.  We have re-coded
*from* C to Python in order to IMPROVE performance."

Python-coded applications aren't always faster than corresponding
C-coded ones.  Sometimes they're considerably slower.  Many new-
comers to Python, though, underestimate how much performance they'll
gain *algorithmically* by developing at the high level of Python or
Erlang or ML.


From john_sips_teaz at yahooz.com  Sat Feb  4 02:02:41 2006
From: john_sips_teaz at yahooz.com (John M. Gabriele)
Date: Sat, 04 Feb 2006 02:02:41 -0500
Subject: python's library support
In-Reply-To: <1139025112.098122.131330@z14g2000cwz.googlegroups.com>
References: <1139025112.098122.131330@z14g2000cwz.googlegroups.com>
Message-ID: <CmYEf.1558$Np6.890@fe11.lga>

Sean wrote:
> I am a newbie in python, and I have a feeling that python provides less
> library support than perl www.cpan.org  This seems a big discussion
> topic.
> 
> I want to know if there is extensive algorithm library support in
> python. I know there is a pretty neat module in perl to implement graph
> theory. Is there a graph theory module in python?
> 
> Thanks,
> 

You might have a look around at the cheese shop:

http://cheeseshop.python.org/pypi

---J

-- 
(remove zeez if demunging email address)


From root at localhost  Sun Feb  5 20:44:16 2006
From: root at localhost (Arthur Cannell)
Date: Sun, 05 Feb 2006 17:44:16 -0800
Subject: Newbie Help!
In-Reply-To: <43e6a1d4$0$6951$ed2619ec@ptn-nntp-reader02.plus.net>
References: <43e6a1d4$0$6951$ed2619ec@ptn-nntp-reader02.plus.net>
Message-ID: <nOydnXyscu5sNHveRVn-ig@comcast.com>

Stephen wrote:
> Hi All,
>         im new to python i just have a few questions and was wondering if 
> you could help me??
> 
> 1. what programming langaugue does python use? or which is most popular?
> 
> 2. Does anyone know where i could get hold of practice code
> 
> 3. Any good ebooks or links to start with. (according to the web this is the 
> best place to start.)
> 
> i know you probally get asked these questions all the time! but im trying to 
> mirgrate for windows to linux.
> 
> Cheers all
> CFR 
> 
> 

Type "python" into Google's search text input.
Hit "I'm Feeling Lucky".
Enjoy.
Good luck with the migration.


From dbasch at yahoo.com  Tue Feb 28 16:36:17 2006
From: dbasch at yahoo.com (Derek Basch)
Date: 28 Feb 2006 13:36:17 -0800
Subject: Matplotlib logarithmic scatter plot
References: <1141073994.346490.16070@j33g2000cwa.googlegroups.com>
	<1141075713.027689.66800@t39g2000cwt.googlegroups.com>
	<1141077576.303733.31070@i40g2000cwc.googlegroups.com>
	<87irr0o01x.fsf@peds-pc311.bsd.uchicago.edu>
	<1141085671.456746.175090@i39g2000cwa.googlegroups.com>
	<87lkvvfjug.fsf@peds-pc311.bsd.uchicago.edu>
Message-ID: <1141162577.569974.213920@p10g2000cwp.googlegroups.com>

Thanks again. Here is the finished product. Maybe it will help someone
in the future:

from pylab import *

def log_10_product(x, pos):
    """The two args are the value and tick position.
    Label ticks with the product of the exponentiation"""
    return '%1i' % (x)

ax = subplot(111)
# Axis scale must be set prior to declaring the Formatter
# If it is not the Formatter will use the default log labels for ticks.
ax.set_xscale('log')
ax.set_yscale('log')

formatter = FuncFormatter(log_10_product)
ax.xaxis.set_major_formatter(formatter)
ax.yaxis.set_major_formatter(formatter)

ax.scatter( [3, 5, 70, 700, 900], [4, 8, 120, 160, 200], s=8, c='b',
marker='s', faceted=False)
ax.scatter( [1000, 2000, 3000, 4000, 5000], [2000, 4000, 6000, 8000,
1000], s=8, c='r', marker='s', faceted=False)

ax.set_xlim(1e-1, 1e5)
ax.set_ylim(1e-1, 1e5)
grid(True)
xlabel(r"Result", fontsize = 12)
ylabel(r"Prediction", fontsize = 12)

show()



From gsakkis at rutgers.edu  Tue Feb  7 01:50:08 2006
From: gsakkis at rutgers.edu (George Sakkis)
Date: 6 Feb 2006 22:50:08 -0800
Subject: fairly large webapp: from Java to Python. experiences?
References: <1139005746.363918.267370@g47g2000cwa.googlegroups.com>
Message-ID: <1139295008.582816.260650@z14g2000cwz.googlegroups.com>

> Any tips, stories, recommendations, and/or experiences are most
> welcome.

Just one suggestion, read the article "Things You Should Never Do, Part
I" first (
http://www.joelonsoftware.com/articles/fog0000000069.html). Quoting
from the article:

(Netscape made) "the *single worst strategic mistake* that any software
company can make: They decided to rewrite the code from scratch."

As much as I find python more maintenable and fun to work with in the
long run, I would be *very hesitant* to start a complete rewrite,
especially given the insufficient documentation of your webapp and your
lack of experience with a pythonic web framework.

George



From mark at mark-fink.de  Fri Feb 10 12:55:38 2006
From: mark at mark-fink.de (Mark Fink)
Date: 10 Feb 2006 09:55:38 -0800
Subject: Jython inherit from Java class
In-Reply-To: <43eab05b_2@newspeer2.tds.net>
References: <1139344211.725580.263660@g47g2000cwa.googlegroups.com>
	<43eab05b_2@newspeer2.tds.net>
Message-ID: <1139594138.216488.12730@g14g2000cwa.googlegroups.com>

Alan, Kent, many thanks this really helped!
But there is still a problem I guess with inheritance. I use the java
testsuit supplied with the original to test the server. If I use the
Java FitServer the testsuite can be completed. I commented everything
out from my class and it does not work??
Thats the trace when I run the JUnit testsuit:
java.io.IOException: CreateProcess: jython
D:\AUT_TEST\workspace\JyFIT\fit\JyFitServer.py
-Dpython.path='D:\AUT_TEST\workspace\JyFIT'
D:\AUT_TEST\fitnesse\fitnesse.jar localhost 1234 23 error=2
	at java.lang.ProcessImpl.create(Native Method)
	at java.lang.ProcessImpl.<init>(Unknown Source)
	at java.lang.ProcessImpl.start(Unknown Source)
	at java.lang.ProcessBuilder.start(Unknown Source)
	at java.lang.Runtime.exec(Unknown Source)
	at java.lang.Runtime.exec(Unknown Source)
	at java.lang.Runtime.exec(Unknown Source)
	at
FitServerTest.FitServerTest.prepareSessionProcess(FitServerTest.java:163)
	at
FitServerTest.FitServerTest.testSimpleStartUp(FitServerTest.java:36)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at junit.framework.TestCase.runTest(TestCase.java:154)
	at junit.framework.TestCase.runBare(TestCase.java:127)
	at junit.framework.TestResult$1.protect(TestResult.java:106)
	at junit.framework.TestResult.runProtected(TestResult.java:124)
	at junit.framework.TestResult.run(TestResult.java:109)
	at junit.framework.TestCase.run(TestCase.java:118)
	at junit.framework.TestSuite.runTest(TestSuite.java:208)
	at junit.framework.TestSuite.run(TestSuite.java:203)
	at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:478)
	at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:344)
	at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)

Unfortunately I do not get much information at the prompt because both
Java FitServer and JyFitServer behave the same there.
D:\AUT_TEST>jython D:\\AUT_TEST\\workspace\\JyFIT\\fit\\JyFitServer.py
-Dpython.path='D:\\AUT_TEST\\workspace\\JyFIT'
D:\\AUT_TEST\\fitnesse\\fitnesse.jar localhost 1234 23
Traceback (innermost last):
  File "D:\\AUT_TEST\\workspace\\JyFIT\\fit\\JyFitServer.py", line 42,
in ?
java.net.ConnectException: Connection refused: connect
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
        at
java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
        at java.net.Socket.connect(Socket.java:507)
        at java.net.Socket.connect(Socket.java:457)
        at java.net.Socket.<init>(Socket.java:365)
        at java.net.Socket.<init>(Socket.java:178)
        at fit.FitServer.establishConnection(Unknown Source)
        at fit.FitServer.establishConnection(Unknown Source)
        at fit.FitServer.run(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at
org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java)
        at org.python.core.PyMethod.__call__(PyMethod.java)
        at org.python.core.PyObject.__call__(PyObject.java)
        at org.python.core.PyInstance.invoke(PyInstance.java)
        at
org.python.pycode._pyx0.f$0(D:\\AUT_TEST\\workspace\\JyFIT\\fit\\JyFitServer.py:42)
        at
org.python.pycode._pyx0.call_function(D:\\AUT_TEST\\workspace\\JyFIT\\fit\\JyFitServer.py)
        at org.python.core.PyTableCode.call(PyTableCode.java)
        at org.python.core.PyCode.call(PyCode.java)
        at org.python.core.Py.runCode(Py.java)
        at org.python.core.__builtin__.execfile_flags(__builtin__.java)
        at
org.python.util.PythonInterpreter.execfile(PythonInterpreter.java)
        at org.python.util.jython.main(jython.java)

java.net.ConnectException: java.net.ConnectException: Connection
refused: connect

###### And the Java FitServer:
D:\AUT_TEST>java -cp D:\\AUT_TEST\\fitnesse\\fitnesse.jar fit.FitServer
localhost 1234 23
Exception in thread "main" java.net.ConnectException: Connection
refused: connect
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.PlainSocketImpl.doConnect(Unknown Source)
        at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
        at java.net.PlainSocketImpl.connect(Unknown Source)
        at java.net.SocksSocketImpl.connect(Unknown Source)
        at java.net.Socket.connect(Unknown Source)
        at java.net.Socket.connect(Unknown Source)
        at java.net.Socket.<init>(Unknown Source)
        at java.net.Socket.<init>(Unknown Source)
        at fit.FitServer.establishConnection(Unknown Source)
        at fit.FitServer.establishConnection(Unknown Source)
        at fit.FitServer.run(Unknown Source)
        at fit.FitServer.main(Unknown Source)

... not to bad.
That is the code with everything commented out:
import sys
import fit.FitServer
import fitnesse.components.FitProtocol
from fit.Parse import Parse
from fit.Fixture import Fixture

# Inherit from original Java FitServer Implementation by Robert C.
Martin and Micah D. Martin
class JyFitServer(fit.FitServer):
    """
    # call constructor of superclass
    def __init__(self, host, port, verbose):
        fit.FitServer.__init__(self, host, port, verbose)

    # override process method
    def process(self):
        self.fixture.listener = self.fixtureListener
        print "hello, I am JyFitServer!"
        try:
            size = FitProtocol.readSize(self.socketReader)
            if size > 0:
                try:
                    document =
FitProtocol.readDocument(self.socketReader, size)
                    tables = Parse(document)
                    fixture = Fixture()
                    fixture.listener = self.fixtureListener;
                    fixture.doTables(tables)
                    self.counts.tally(self.fixture.counts)
                except FitParseException, e:
                    self.exception(e)
        except Exception, e:
            self.exception(e)
    """

# this is main
jyFitServer = JyFitServer()
sys.argv.pop(0) # remove first parameter
sys.argv.pop(0) # remove first parameter
sys.argv.pop(0) # remove first parameter
sys.argv.pop(0) # remove first parameter
#print sys.argv
jyFitServer.run(sys.argv)
#return jyFitServer.exitCode()

I have the feeling that I am almost there. Yust something small
missing.



From husio at o2.pl  Sun Feb  5 17:36:06 2006
From: husio at o2.pl (Piotr Husiatynski)
Date: Sun, 05 Feb 2006 23:36:06 +0100
Subject: Python, GUI, and GTK+
Message-ID: <43E67DD6.9@o2.pl>

Hi,
I'm new at GUI programming. I've heard about Gazpacho but I couldn't find
 any tutorial about it on Internet (even on the gazpacho page). Becouse of
that fact, I've installed Glaze, but there's probably no tutorials for
python too.
Can anyone point me an introdutory tutorial on how to implement a very
simple application in GTK+ based on a XML file?



From bkhl at stp.lingfil.uu.se  Sun Feb 12 08:43:53 2006
From: bkhl at stp.lingfil.uu.se (=?utf-8?Q?Bj=C3=B6rn_Lindstr=C3=B6m?=)
Date: Sun, 12 Feb 2006 14:43:53 +0100
Subject: Is python very slow compared to C
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
	<1139743205.985196.254330@g43g2000cwa.googlegroups.com>
	<mailman.1776.1139745557.27775.python-list@python.org>
	<1139747631.858424.145230@z14g2000cwz.googlegroups.com>
	<mailman.1778.1139749598.27775.python-list@python.org>
Message-ID: <87r768r8ti.fsf@killalla.dreaming>

Felipe Almeida Lessa <felipe.lessa at gmail.com>:

> In the case of Python, as well as Java, the language has the same
> name as the framework, and this may have lead you to mistake me.

Not really, in either case. There's Python for both .NET and for the
Java VM.

-- 
Bj?rn Lindstr?m <bkhl at stp.lingfil.uu.se>
Student of computational linguistics, Uppsala University, Sweden


From russandheather at gmail.com  Thu Feb  9 11:07:11 2006
From: russandheather at gmail.com (Russell Warren)
Date: 9 Feb 2006 08:07:11 -0800
Subject: Finding the public callables of self
Message-ID: <1139501230.964886.190500@g43g2000cwa.googlegroups.com>

Is there any better way to get a list of the public callables of self
other than this?

    myCallables = []
    classDir = dir(self)
    for s in classDir:
      attr = self.__getattribute__(s)
      if callable(attr) and (not s.startswith("_")):
        myCallables.append(s) #collect the names (not funcs)

I don't mean a shorter list comprehension or something that just drops
the line count, but whether or not I need to go at it through dir and
__getattribute__.  This seems a bit convoluted and with python it often
seems there's something already canned to do stuff like this when I do
it.  At first I thought self.__dict__ would do it, but callable methods
seem to be excluded so I had to resort to dir, and deal with the
strings it gives me.

Thanks,
Russ



From claird at lairds.us  Wed Feb 22 10:08:03 2006
From: claird at lairds.us (Cameron Laird)
Date: Wed, 22 Feb 2006 15:08:03 GMT
Subject: What are COM-enabled applications?
References: <1140580133.293283.322870@f14g2000cwb.googlegroups.com>
Message-ID: <gq8uc3-iah.ln1@lairds.us>

In article <1140580133.293283.322870 at f14g2000cwb.googlegroups.com>,
Tempo <bradfordh at gmail.com> wrote:
>As the subject of this post suggests, I have one question; what are
>COM-enabled applications? I believe Microsoft Word is one of these
>apps, but what else? Is a web browser, Paint, Solitare, games, etc? I'm
>not sure if it varies from operating system to operating system, but I
>am talking about COM applications in Windows. Thanks for any and all of
>your help and time.
>

As Mr. Teja has already written in response, COM is a big, and 
in some ways dated, subject.  To answer your specific questions:
yes, most Web browsers I know for Windows *are* COM-enabled, 
Solitaire typically isn't, and I'm not near a Win* machine now
to confirm that Paint is.

Python has good COM abilities.  While, to my surprise, I just
realized that I'm unaware of anyone having put together a COM
"explorer" with Python, it would be a straightforward project.
In the meantime, <URL:
http://aspn.activestate.com/ASPN/docs/ActivePython/2.3/PyWin32/html/com/win32com/HTML/QuickStartClientCom.html#UsingComConstants >
might interest you.


From johnzenger at gmail.com  Tue Feb 28 12:10:26 2006
From: johnzenger at gmail.com (johnzenger at gmail.com)
Date: 28 Feb 2006 09:10:26 -0800
Subject: comple list slices
In-Reply-To: <mailman.2519.1141145363.27775.python-list@python.org>
References: <mailman.2516.1141136527.27775.python-list@python.org>
	<1141143200.110570.51680@u72g2000cwu.googlegroups.com>
	<mailman.2519.1141145363.27775.python-list@python.org>
Message-ID: <1141146626.762530.282660@v46g2000cwv.googlegroups.com>

Although I don't know if this is faster or more efficient than your
current solution, it does look cooler:

def grouprows(inrows):
    rows = []
    rows[:] = inrows  #  makes a copy because we're going to be
deleting
    while len(rows) > 0:
        rowspan = rows[0]["rowspan"]
        yield rows[0:rowspan]  # "returns" this value, but control flow
unaffected
        del rows[0:rowspan]  # remove what we just returned from the
list, and loop

grouper = grouprows(copyrows)
print [x for x in grouper]

This is basically just a simple function that rips chunks off the front
of a list and returns them.  Because the function uses "yield" rather
than "return," it becomes a generator, which can be treated by Python
as an iterator.



From theller at python.net  Wed Feb 22 05:35:46 2006
From: theller at python.net (Thomas Heller)
Date: Wed, 22 Feb 2006 11:35:46 +0100
Subject: May i customize basic operator (such as 1==3)?
In-Reply-To: <dthd01$7t8$1@sea.gmane.org>
References: <dtgpbb$asm$2@sea.gmane.org>	<BAY108-F85E0B9B4C44B7CAA16D68CDFD0@phx.gbl>
	<dthd01$7t8$1@sea.gmane.org>
Message-ID: <dtheq2$cgb$1@sea.gmane.org>

Carl Friedrich Bolz wrote:
> kanchy kang wrote:
>> many people write test cases with python scripts.
>> in these test scripts, there are many validation statements,
>> for example, in unittest, failUnless(a == b),(a/b may be stringType or 
>> intType...)
>>
>> during running test scripts, if there is one exception raised from 
>> failUnless, i still do not know a =?, b= ?... i have to add one statment 
>> "print a" or "print b" again...
>>
>> as i know, there are many validation statements if using python as one 
>> test tool...
>> i think my suggestion or requirement may benefit users greatly...
>>
> 
> you could use the py.test testing framework 
> (http://codespeak.net/py/current/doc/test.html), which tries to print 
> useful information if a test fails.

The standard unittest module can do this also:  replace
calls to failUnless(a == b) with failUnlessEqual(a, b).

Thomas



From onurb at xiludom.gro  Thu Feb  9 04:50:26 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Thu, 09 Feb 2006 10:50:26 +0100
Subject: how to remove <BR> using replace function?
In-Reply-To: <1139462640.951603.302830@g44g2000cwa.googlegroups.com>
References: <1139462640.951603.302830@g44g2000cwa.googlegroups.com>
Message-ID: <43eb107c$0$4677$636a15ce@news.free.fr>

localpricemaps at gmail.com wrote:
> i have some html that looks like this
> 
> 
> <address style="color:#">34 main,<br> Boston, MA</address>
> 
> and i am trying to use the replace function to get rid of the <Br> that
> i scrape out using this code:
> 
> for oText in incident.fetchText( oRE):
>             strTitle += oText.strip()

Why concatening ?

>             strTitle = string.replace(strTitle,'<br>','')

Use strTitle.replace('<br>', '') instead. And BTW, hungarian notation is
evil, so:
for text in incident.fetchText(...):
   title = text.strip().replace('<br>', '')



> but it doesn't seem to remove the <br>

it does :

Python 2.4.2 (#1, Feb  9 2006, 02:40:32)
[GCC 3.4.5 (Gentoo 3.4.5, ssp-3.4.5-1.0, pie-8.7.9)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> s = '<address style="color:#">34 main,<br> Boston, MA</address>'
>>> s.replace('<br>', '')
'<address style="color:#">34 main, Boston, MA</address>'
>>>

The problem is obviously not with str.replace(), as you could have
figured out by yourself very easily.

> any ideas?

yes: post the minimal *running* code that exhibit the problem.

Your problem is probably elsewhere, and given some of previous posts
here ('problems writing tuple to log file' and 'indentation messing up
my tuple?'), I'd say that a programming101 course should be your first
move.


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From erniedude at gmail.com  Fri Feb  3 16:59:35 2006
From: erniedude at gmail.com (Ernesto)
Date: 3 Feb 2006 13:59:35 -0800
Subject: Launch Windows command window....
Message-ID: <1139003975.837861.141680@o13g2000cwo.googlegroups.com>

I'm trying to launch a seperate telnet window from within my python
program.  The command I thought I was supposed to use is below:

os.system("telnet.exe -f C:\Folder\output.txt localhost 6000")

This creates a telnet window inside the current window.  This is not
desirable.  I need it to launch a seperate command window for telnet
output.  Any ideas ?



From scott.daniels at acm.org  Mon Feb 27 11:58:08 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Mon, 27 Feb 2006 08:58:08 -0800
Subject: ls files --> list packer
In-Reply-To: <1141016518.080809.259990@j33g2000cwa.googlegroups.com>
References: <1140765792.864556.289820@i40g2000cwc.googlegroups.com>
	<1140767111.490691.42460@e56g2000cwe.googlegroups.com>
	<dtml8u$1vh$1@gemini.csx.cam.ac.uk>
	<1141012342.805500.308750@i39g2000cwa.googlegroups.com>
	<440273e8$1_1@newspeer2.tds.net>
	<1141016518.080809.259990@j33g2000cwa.googlegroups.com>
Message-ID: <44032de3$1@nntp0.pdx.net>

kpp9c wrote:
> Thank you... i was looking in the wrong place cause all i found was
> this relatively useless doc:
>     http://docs.python.org/lib/module-os.html
> which says almost nothing.
> 
In one of its subsections, cleverly named "Files and Directories",
I see a nice description of listdir.

     http://docs.python.org/lib/os-file-dir.html

You also might want to read about os.walk in the same page.
In the os.path module you can see more path name manipulations.
If you intend to know a language, you should read its manuals
fast; what you want is a vague impression where information
lives and what information is there.  Maybe half a year later
do it again.  After that every couple of years often suffices.
At the very least, go through the full tutorial, read docs on
the "obvious" modules for everyone and for your particular
area of endeavor, and then on a snacking basis get yourself
through the rest unless you decide that you never want to deal
with, for example, unix-specific services or internet protocols.

Don't expect to acquire _any_ language with "just in time" (JIT)
techniques.  Perhaps JIT works for magic.  When you acquire a
language with JIT, you miss the subtleties of the language.
You will be doomed to writing the same kinds of programs in every
language you touch ("writing Fortran in Algol" is what we used to
call it).  I've worked on code that was Java-in-Python, and it was
frustratingly hard to understand.

--Scott David Daniels
scott.daniels at acm.org


From nashborges at gmail.com  Fri Feb 10 18:56:13 2006
From: nashborges at gmail.com (nashmeister)
Date: 10 Feb 2006 15:56:13 -0800
Subject: installing matplotlib in cygwin
Message-ID: <1139615772.898892.202020@g47g2000cwa.googlegroups.com>

has anyone had any success compiling matplotlib in cygwin?  i had some
rebasing problems that i got around, but when i finally got everything
to install without any complaints and did "import pylab" i got dumped
out of python altogether without any errors.

some thing i did:
cd  /usr/lib
ln -s libtk84.a libtk8.4.a
ln -s libtcl84.a libtcl8.4.a
cd /
find /usr/lib/python2.2/site-packages -name "*.dll" >
/etc/setup/python-site-packages.lst
(remove all initial slashes)
gzip /etc/setup/python-site-packages.lst

(exit all cygwin and 'rebaseall')
cd /tmp
tar xzvf matplotlib-0.86.2.tar.gz
cd matplotlib-0.86.2
(edit matplotlibrc)
(change to "backend:TkAgg" and "numerix:numpy")
(edit setup.py)
(change to 'backend':'TkAgg' and 'numerix':'numpy')
(change to "BUILD_GTKAGG = False")
(change to "BUILD_GTK = False")
(change to "BUILD_TKAGG = True")
python setup.py build
python setup.py install



From franck.perez at gmail.com  Fri Feb  3 17:28:08 2006
From: franck.perez at gmail.com (Franck PEREZ)
Date: Fri, 3 Feb 2006 23:28:08 +0100
Subject: Automatic class attribute
Message-ID: <f6b00e360602031428v1228d1fai70c9000b6403df3@mail.gmail.com>

Hello all,

Considering the following code :

class C(object):
   ...:     observers = []
   ...:
   ...:     @classmethod
   ...:     def showObservers(cls):
   ...:         print cls.observers

class D1(C):
   ...:     observers = [] #could it be moved in C ?

class D2(C):
   ...:     observers = [] #could it be moved in C ?

I want each child class of C to have it's own "observers" class attribute.

The code I provided works... but I'd like to avoid typing "observers =
[]" in each child class.

Is it possible to define something in C which would basically mean :
"for each child class, automatically bind a new list attribute called
observers" ?

Are metaclasses a way ? Is it possible to avoid them ?
Thanks a lot,
Franck


From peter at engcorp.com  Tue Feb 14 10:00:36 2006
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 14 Feb 2006 10:00:36 -0500
Subject: Python / Apache / MySQL
In-Reply-To: <0001HW.C0177A69000B1680F0407550@news.individual.de>
References: <1139907519.427789.188760@g14g2000cwa.googlegroups.com>	<slrndv38ti.7rh.sybrenUSE@schuimige.unrealtower.org>	<0001HW.C01764D700060858F0407550@news.individual.de>	<43f1aebb$0$1728$636a55ce@news.free.fr>	<0001HW.C01772E1000952B1F0407550@news.individual.de>	<mailman.1893.1139915116.27775.python-list@python.org>
	<0001HW.C0177A69000B1680F0407550@news.individual.de>
Message-ID: <dssraj$l1b$1@sea.gmane.org>

Kalle Anke wrote:
> On Tue, 14 Feb 2006 12:04:45 +0100, Peter Hansen wrote:
>>Don't optimize prematurely?  If you use something like SQLObject, or any 
>>other means of abstracting yourself away from the details of a specific 
>>datbase, you won't be particularly tied to it if you decide you need 
>>improved performance, or sophistication, or whatever.
> 
> That's true ... I was thinking in general terms here (a couple of people I 
> know handles huge data sets, genome data type of things, and in their case 
> speed is very important)

There is information about SQLite speed starting here 
http://www.sqlite.org/speed.html (where it notes that that particular 
page is obsolete, but also points to the wiki for more).

The summary would appear to be that SQLite is definitely faster in some 
cases, definitely slower in others, and that as usual a measurement of 
inadequate speed followed by profiling is essential to knowing what to 
do about any of that. :-)

-Peter



From cyborg4 at walla.co.il  Mon Feb 27 08:39:40 2006
From: cyborg4 at walla.co.il (cyborg4 at walla.co.il)
Date: 27 Feb 2006 05:39:40 -0800
Subject: How to do an 'inner join' with dictionaries
Message-ID: <1141047580.492771.97130@z34g2000cwc.googlegroups.com>

Let's say I have two dictionaries:
dict1 is  1:23,  2:76,  4:56
dict2 is  23:A, 76:B,  56:C

How do I get a dictionary that is
1:A, 2:B, 4:C



From deets at nospam.web.de  Tue Feb  7 09:24:25 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 07 Feb 2006 15:24:25 +0100
Subject: variables preceeded with @
References: <1139321853.827836.279270@g14g2000cwa.googlegroups.com>
Message-ID: <44rotbF3l5fkU1@uni-berlin.de>

Thomas Girod wrote:

> Hello there.
> 
> I recently started looking at turbogears and I found code such as :
> 
>  class Root(controllers.Root):
>      @turbogears.expose(html="blog.templates.accueil")
>      def index(self,**kw):
>          return dict()
> 
> 
> What is this "@" ? I looked around but couldn't find any references to
> this syntax.

It is called a decorator syntax, and is basically syntactic sugar for the
following:

class Foo(object):
    def bar(self):
        pass

    bar = decorate(bar)

is 

class Foo(object):
    @decorate
    def bar(self):
        pass


You can also have parameterized decorators, as the ones in TG:

class Foo(object):
    def bar(self):
        pass

    bar = decorate_with_args("some argument")(bar)

is 

class Foo(object):
    @decorate_with_args("some argument")
    def bar(self):
        pass


I suggest you read this to get on speed with decorators:

http://www.phyast.pitt.edu/~micheles/python/documentation.html



Regards,

Diez



From tjreedy at udel.edu  Sun Feb 19 00:58:49 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 19 Feb 2006 00:58:49 -0500
Subject: aborting without killing the python interpreter
References: <1140320926.993703.90380@o13g2000cwo.googlegroups.com>
	<dt8vvc$2vq$1@sea.gmane.org>
Message-ID: <dt91eq$5sq$1@sea.gmane.org>

<correction>

"Terry Reedy" <tjreedy at udel.edu> wrote in message 
news:dt8vvc$2vq$1 at sea.gmane.org...
> How?  In the standard interpreter, 'exit' is bound to the string
> 'Use Ctrl-Z plus Return to exit.'

This is, of course, Windows specific.  Other systems have other strings. 





From fuzzyman at gmail.com  Mon Feb 20 05:19:43 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 20 Feb 2006 02:19:43 -0800
Subject: Komodo - Will it Lock Me In?
In-Reply-To: <yEncExpress_Rulz!_www.techsono.com_3223251148@firstva.com>
References: <yEncExpress_Rulz!_www.techsono.com_3223251148@firstva.com>
Message-ID: <1140430783.815033.12490@z14g2000cwz.googlegroups.com>


Matt wrote:
> "Peter Decker" <pydecker at gmail.com> wrote:
>
> >You should take a look at Dabo,
>
> Yes, I have Dabo installed on my system. I made a small test app, but was
> unable to deploy it. I was getting an error from py2exe, I think, about how my
> wxPython installation was not correct. This is the kind of thing I am talking
> about. If Dabo were an integrated system, I wouldn't have to spend many days
> struggling to install package after package and then get them all to play nice
> with each other.
>
> Having said that, I will continue to struggle and like Dabo as the best option
> so far.
>

Have you reported your problem on the py2exe mailing list ? Lots of
people use py2exe with wxPython - so it should be possible to resolve.

(To post to the py2exe mailing list, please incldue the full error
message and a copy of the 'setup.py' you are using. This will help
people diagnose the problem.)

I have two other recommendations.

1) Look at SPE the editor - htttp://pythonide.stani.be
    It is open source and includes a GUI builder as well. It's a very
nice editor.
2) For *deploying* applications you could consider Movable Python.
You'll need to buy a license per *target* machine, but it's a full
distribution of Python - so doesn't need the 'build' phase of deploying
with py2exe.

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml


> Thanks,
> Matt



From tim.golden at viacom-outdoor.co.uk  Tue Feb 14 07:00:38 2006
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 14 Feb 2006 12:00:38 -0000
Subject: file names longer than MAX_PATH under Windows 2003
Message-ID: <9A28C052FF32734DACB0A288A3533991044D2559@vogbs009.gb.vo.local>

[Sergey]

| "Tim Golden" <tim.golden at viacom-outdoor.co.uk> wrote in 
| message news:mailman.1895.1139917457.27775.python-list at python.org...
| [Sergey]
| 
| >But note that r prefix to the string. Is it possible
| >that your string didn't include it? If not, then the
| >backslash character which Windows uses as a separator
| >can be stolen by Python which sees it as an escaping
| >character.
| 
| It's ok with backslashes, I don't use r'', but double them so 
| string is correct:
| >>> print c
| \\?\e:\files\........

Not to state the obvious, but can you cut-and-paste that long
string (the one starting with \\?\e:\...) from the Python
interpreter into the [S]tart [R]un [O]pen field to see what
comes up? I'm just trying to make sure of the most straightforward
fact: that the file you've got there definitely does exist!

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
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From LittlePython at lost.com  Tue Feb 14 21:46:23 2006
From: LittlePython at lost.com (LittlePython)
Date: Wed, 15 Feb 2006 02:46:23 GMT
Subject: Newbie
References: <v3JHf.2731$lo3.2501@trnddc07><43ef6433$0$25387$636a55ce@news.free.fr>
	<HZJHf.2737$lo3.1139@trnddc07><1139806792.698674.168530@g44g2000cwa.googlegroups.com><PCuIf.32401$lo3.15259@trnddc07>
	<mailman.1926.1139963961.27775.python-list@python.org>
Message-ID: <3CwIf.16100$7C3.13881@trnddc08>

I have no idea what top-posting or bottom-posting is?

"Felipe Almeida Lessa" <felipe.lessa at gmail.com> wrote in message
news:mailman.1926.1139963961.27775.python-list at python.org...
> Em Qua, 2006-02-15 ?s 00:30 +0000, LittlePython escreveu:
> > I really do not wish to limit myself to MS. My bread and butter is MS
but I
> > am a BSD fan at heart. I wanted to learn something I can use in both.
>
> Please start by not top-posting ;-). Also, see
> http://www.mono-project.com/VisualBasic.NET_support .
>
> --
> "Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
> outros povos sem travar batalha, toma cidades fortificadas dos outros
> povos sem as atacar e destr?i os estados dos outros povos sem lutas
> prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
> 'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
> poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."
>
>   -- Sun Tzu, em "A arte da guerra"
>




From LittlePython at lost.com  Tue Feb 14 22:23:45 2006
From: LittlePython at lost.com (LittlePython)
Date: Wed, 15 Feb 2006 03:23:45 GMT
Subject: How to cat None
Message-ID: <59xIf.16847$CZ4.13956@trnddc05>

I found out the hard way that I can not cat None. I get an error. Is there a
simple way to cat None without doing some kind of equation  ( if this then
that). Is there a isNone() somewhere. I am not too sure I know what None
really means.

I include an example to show what I am talking about in case I am alittle
confused.




from easygui import *
import string

msgbox('Starting Program')

thisfile = fileopenbox(msg='Choose the correct File', title='Matrix Input
File')
input = file(thisfile,'r')

header = string.split(string.strip(input.readline()),',')
header.extend(['55FirstName',
'55Intial','55LastName','55Alias',])

all = input.readlines()
input.close
input = None
matrix = {}
for user in all:
    user1 = string.split(string.strip(user),',')
    user1.extend(['None']*4)    <-------------------------I would like to
None  or better NULL this instead of string it
    user1 = dict(zip(header,user1))
    matrix[user1['OldNTLogon']] = user1

mychoice = choicebox(choices=matrix.keys())
user1 = matrix[mychoice]

alltogether = ''

for KeyName in user1.keys():
    if alltogether == '':
        alltogether = KeyName + '=' + '  ' + user1.get(KeyName) + '\n'
    else:
        alltogether = alltogether + KeyName + '=' + user1.get(KeyName) +
'\n'  <------- error 'can not cat None with a str' or something like that

msgbox(alltogether,'User Matrix for '+ mychoice )

msgbox('The End')




From dementrio at gmail.com  Wed Feb 15 07:07:37 2006
From: dementrio at gmail.com (dementrio)
Date: 15 Feb 2006 04:07:37 -0800
Subject: low level data types
Message-ID: <1140005257.773955.32860@g14g2000cwa.googlegroups.com>

How can I handle low-level data types in Python?
What I want to do is writing an interface to a C daemon which waits for
stuff like unsigned ints on a socket. For example, I need to craft and
decode data structures that look like this:

32-bit unsigned int MSG_LENGTH
32-bit unsigned int MSG_CODE
64-bit signed int DATA
32-bit length + utf-8 characters STRING_DATA
etc.

What's the right way to do this in Python?



From bignose+hates-spam at benfinney.id.au  Tue Feb 28 20:29:20 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 01 Mar 2006 12:29:20 +1100
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<mailman.2522.1141151657.27775.python-list@python.org>
Message-ID: <87r75n2brj.fsf@rose.polar.local>

Toby Dickenson <tdickenson at devmail.geminidataloggers.co.uk> writes:

> On Monday 27 February 2006 02:49, Ben Finney wrote:
>> Coercing a value from an enumeration to a ``str`` results in the
>> string that was specified for that value when constructing the
>> enumeration::
>
> That sentence seems to assume that all enumeration values will have
> been specified as strings. Thats reasonable, but your description of
> the creation of an enumeration doesnt specify that.

True; I'll need to fix the specification so that it does say that.

>> An enumerated type is created from a sequence of arguments to the
>> type's constructor::
>> 
>>     >>> Weekdays = enum('sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat')
>>     >>> Grades = enum('A', 'B', 'C', 'D', 'F')
>
> s/arguments/strings/

s/arguments/string arguments/ :-)

-- 
 \       "Too many pieces of music finish too long after the end."  -- |
  `\                                                  Igor Stravinskey |
_o__)                                                                  |
Ben Finney


From fakeaddress at nowhere.org  Fri Feb 10 17:01:52 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Fri, 10 Feb 2006 22:01:52 GMT
Subject: Question about idioms for clearing a list
In-Reply-To: <dsibhl$f66$1@wake.carmen.se>
References: <mailman.1294.1138727665.27775.python-list@python.org>	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>	<mailman.1489.1139232969.27775.python-list@python.org>	<ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>	<mailman.1537.1139297533.27775.python-list@python.org>	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>	<mailman.1546.1139320907.27775.python-list@python.org>	<dscdtr$ciu$1@wake.carmen.se>
	<mailman.1594.1139403378.27775.python-list@python.org>
	<dsd311$qlp$1@wake.carmen.se>
	<ZatGf.28418$F_3.14242@newssvr29.news.prodigy.net>
	<dsfej3$1i6$1@wake.carmen.se>
	<cQRGf.54501$PL5.14689@newssvr11.news.prodigy.com>
	<dsho58$47k$1@wake.carmen.se>
	<qYZGf.26902$Jd.11304@newssvr25.news.prodigy.net>
	<dsibhl$f66$1@wake.carmen.se>
Message-ID: <k38Hf.29051$F_3.9448@newssvr29.news.prodigy.net>

Magnus Lycka wrote:
> Bryan Olson wrote:
> 
>> Magnus Lycka wrote:
>>
>>> Bryan Olson wrote:
>>>
>>>>     big_union = set()
>>>>     for collection in some_iter:
>>>>         big_union.update(t)
>>>>         collection.clear()
>>>
>>>
>>> I don't understand the second one. Where did 't' come from?
>>
>>
>> Cut-and-past carelessness. Meant to update with 'collection'.
> 
> 
> If some_iter gives you dicts, the code above will throw away
> your values,  and put the set of keys in big_union. Is that what
> you meant to do?

It can be quite useful. Python only recently added the set
type. Previously, the usual way to implement sets with
efficient membership testing was to use a dict where the
keys map to some irrelevant value. The above will work for
the old technique as well as for the set type.


 > I suspect most people would find this somewhat
> surprising. For sets and "BryanLists" it will put a set of all
> the contents of those collections in big_union.

That was the description: moving everything from several
collections into a single union.


> I think this
> just verifies my previous arguments. It's rarely meaningful to
> write functions that are meaingful for all builtin collections.

That's a nonsense argument, polymorphism doesn't have to work
over every type to be useful. Functions meaningful for either
sets or lists are common; that's enough justification for
giving corresponding operations the same interface.


-- 
--Bryan


From sw at wordtech-software.com  Fri Feb 10 19:16:36 2006
From: sw at wordtech-software.com (Kevin Walzer)
Date: Fri, 10 Feb 2006 19:16:36 -0500
Subject: Yet another GUI toolkit question...
Message-ID: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>

...with a twist.

I'm undertaking my first semi-substantial Python GUI application after a
long time dabbling with the language.

I'm fairly experienced with Tcl/Tk, so Tkinter seems the obvious choice
to reduce my Python learning curve. However, my Tcl applications
typically make use of a *lot* of extensions to the core widget set, such
as BWidgets, tablelist, and Tile.

I've found minimal Tkinter wrappers for all of these extensions, but
they are all labelled "experimental," lightly documented at best, and
little-used (as far as I can tell) by Python developers.

So: my question is, would it be more productive for me to wrestle with
these extensions when there doesn't seem to be much constituency for
their use, or would it be better/faster/more efficient for me to start
scaling the wxPython mountain?

For what it's worth, my application has to run on OS X and Windows, and
will be commercial, so this combination of requirements rules out
PyGTK/PyQt/just about every other cross-platform GUI toolkit.

Advice, especially from those Tkinter devs who look beyond the core
widget set for their apps, is appreciated!

-- 
Kevin Walzer
iReveal: File Search Tool
http://www.wordtech-software.com


From paul at boddie.org.uk  Fri Feb 10 06:51:01 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 10 Feb 2006 03:51:01 -0800
Subject: Determining an operating system's default browser
References: <mailman.1690.1139528346.27775.python-list@python.org>
	<43EBD5E1.1040501@websafe.com>
	<mailman.1692.1139530731.27775.python-list@python.org>
Message-ID: <1139572261.172035.194190@g14g2000cwa.googlegroups.com>

John McMonagle wrote:
> On Thu, 2006-02-09 at 17:53 -0600, Larry Bates wrote:
> > You don't have to determine it.  Just os.startfile('page1.html')
> > and let the OS figure it out.
>
> Works great for Windows - not available on Unix though.

Take a look at the desktop module for similar functionality for KDE,
GNOME and the Mac OS X desktop environment (as well as Windows, of
course):

http://www.python.org/pypi/desktop

Paul



From peterbe at gmail.com  Fri Feb 24 06:43:31 2006
From: peterbe at gmail.com (peterbe at gmail.com)
Date: 24 Feb 2006 03:43:31 -0800
Subject: Using ElementTree to tidy up an XML string to my liking
In-Reply-To: <1140767274.159129.268640@i39g2000cwa.googlegroups.com>
References: <1140716245.381730.285310@j33g2000cwa.googlegroups.com>
	<1140767274.159129.268640@i39g2000cwa.googlegroups.com>
Message-ID: <1140781410.982716.316410@p10g2000cwp.googlegroups.com>

Yes I am but, I'm using a DOM Serializer in Firefox which for some
reason turns myCamelNames into MYCAMELNAMES for the nodenames. I'll
therefore need to control the case-spelling of these things as I'm
formatting the XML string.



From jdhunter at ace.bsd.uchicago.edu  Tue Feb 28 12:56:23 2006
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Tue, 28 Feb 2006 11:56:23 -0600
Subject: Matplotlib logarithmic scatter plot
References: <1141073994.346490.16070@j33g2000cwa.googlegroups.com>
	<1141075713.027689.66800@t39g2000cwt.googlegroups.com>
	<1141077576.303733.31070@i40g2000cwc.googlegroups.com>
	<87irr0o01x.fsf@peds-pc311.bsd.uchicago.edu>
	<1141085671.456746.175090@i39g2000cwa.googlegroups.com>
Message-ID: <87lkvvfjug.fsf@peds-pc311.bsd.uchicago.edu>

>>>>> "Derek" == Derek Basch <dbasch at yahoo.com> writes:

    Derek> Great! That worked fine after I played with it for a
    Derek> bit. One last question though. How do I label the ticks
    Derek> with the product of the exponentiation? For instance:

    Derek> 100

    Derek> instead of

    Derek> 10**2

You can supply your own custom tick formatters (and locators).  See

  http://matplotlib.sf.net/matplotlib.ticker.html 

and examples

  http://matplotlib.sourceforge.net/examples/custom_ticker1.py
  http://matplotlib.sourceforge.net/examples/major_minor_demo1.py
  http://matplotlib.sourceforge.net/examples/major_minor_demo2.py

JDH


From mark at mark-fink.de  Tue Feb  7 15:30:11 2006
From: mark at mark-fink.de (Mark Fink)
Date: 7 Feb 2006 12:30:11 -0800
Subject: Jython inherit from Java class
Message-ID: <1139344211.725580.263660@g47g2000cwa.googlegroups.com>

I wrote a Jython class that inherits from a Java class and (thats the
plan) overrides one method. Everything should stay the same.

If I run this nothing happens whereas if I run the Java class it says:
usage: java fit.FitServer [-v] host port socketTicket
        -v      verbose

I think this is because I do not understand the jython mechanism for
inheritance (yet).

JyFitServer.py:
===========
import fit.FitServer
import fitnesse.components.FitProtocol
from fit.Parse import Parse
from fit.Fixture import Fixture

# Inherit from original Java FitServer Implementation by Robert C.
Martin and Micah D. Martin
class FitServer(fit.FitServer):
    # call constructor of superclass
    def __init__(self, host, port, verbose):
        FitServer.__init__(self, host, port, verbose)

    # override process method
    def process(self):
        self.fixture.listener = self.fixtureListener
        print "hello, I am JyFitServer!"
        try:
            size = FitProtocol.readSize(self.socketReader)
            if size > 0:
                try:
                    document =
FitProtocol.readDocument(self.socketReader, size)
                    tables = Parse(document)
                    fixture = Fixture()
                    fixture.listener = self.fixtureListener;
                    fixture.doTables(tables)
                    self.counts.tally(self.fixture.counts)
                except FitParseException, e:
                    self.exception(e)
        except Exception, e:
            self.exception(e)



Please help,
Mark Fink



From bdesth.quelquechose at free.quelquepart.fr  Sun Feb 12 08:52:02 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 12 Feb 2006 14:52:02 +0100
Subject: by reference
In-Reply-To: <1139598954.259297.74290@o13g2000cwo.googlegroups.com>
References: <mailman.1681.1139517426.27775.python-list@python.org>
	<1139598954.259297.74290@o13g2000cwo.googlegroups.com>
Message-ID: <43ef1edd$0$4165$636a55ce@news.free.fr>

dirvine a ?crit :
> Thanks but I am a bit unsure as to what error I have made by posting
> this question. 

Your question was not very clear.

> I am not trying to be funny but can you give me a
> pointer to the issue.

Have you read Martin Hellwig's answer ?



From drevil_53711 at yahoo.com  Thu Feb 16 16:35:31 2006
From: drevil_53711 at yahoo.com (Steve Young)
Date: Thu, 16 Feb 2006 13:35:31 -0800 (PST)
Subject: preserving POST data
Message-ID: <20060216213531.57457.qmail@web36502.mail.mud.yahoo.com>

Lets say that I'm filling out a form and the information gets sent to  another server first for some processing(before the one that it  "should" go to). But from there, I want that intermediate server to be  able to preserve this POST data using python so it can still retrieve  the page that was originally requested (with some modifications from  the intermediate server). Is there a way to do this with python? Thanks  for the help.
  
  -Steve
  
		
---------------------------------
Brings words and photos together (easily) with
 PhotoMail  - it's free and works with Yahoo! Mail.
-------------- next part --------------
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From dharding at gmail.com  Wed Feb 22 10:30:36 2006
From: dharding at gmail.com (Daniel Harding)
Date: 22 Feb 2006 07:30:36 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com> <43fbc788@usenet01.boi.hp.com>
	<87u0ar3gba.fsf@wilson.homeunix.com>
	<pan.2006.02.22.11.35.14.90948@REMOVETHIScyber.com.au>
Message-ID: <1140622236.786576.46370@f14g2000cwb.googlegroups.com>

Steven D'Aprano wrote:
> Who says Python is so slow? I've just got Python to count from 0 up to
> 100,000, and it only took 7 milliseconds. That's at least 12 milliseconds
> faster than I can count on my fingers.

+1 QOTW



From hancock at anansispaceworks.com  Fri Feb  3 02:44:42 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Fri, 3 Feb 2006 01:44:42 -0600
Subject: How do I dynamically create functions without lambda?
In-Reply-To: <1ha5e9r.gs34le12dm1luN%aleaxit@yahoo.com>
References: <1138389517.896043.7450@g47g2000cwa.googlegroups.com>
	<pan.2006.01.28.00.35.06.174939@REMOVETHIScyber.com.au>
	<1138436008.628882.126510@g44g2000cwa.googlegroups.com>
	<pan.2006.01.28.12.02.34.293286@REMOVETHIScyber.com.au>
	<drr978$oat$1@xenon.Stanford.EDU>
	<1ha3g79.1gcm6x1yziggyN%aleaxit@yahoo.com>
	<mailman.1358.1138907003.27775.python-list@python.org>
	<1ha5e9r.gs34le12dm1luN%aleaxit@yahoo.com>
Message-ID: <20060203014442.21daa210@samwise.anansi>

On Thu, 2 Feb 2006 20:05:14 -0800
aleaxit at yahoo.com (Alex Martelli) wrote:
> Benji York <benji at benjiyork.com> wrote:
> > Alex Martelli wrote:
> > > Disagree -- far more people THINK they're clever, than
> > > really ARE clever.  According to a recent article in
> > > the Financial Times, over 40% of a typical financial
> > > firm's employees firmly believe they are among the 5%
> > > best employees of the firm -- and the situation,
> > > believe me, is no different in programming.
> > 
> > It's apparently no different anywhere: 
> > http://www.phule.net/mirrors/unskilled-and-unaware.html

I have to say, I've read this paper, and it's pretty bad
science.  I think they seriously over-interpreted their
data.  There are a lot of different ways to interpret the
data they present, and it takes a fair amount of sophistry
for them to come up with it "supporting" their hypothesis.

Which doesn't *disprove* the idea, but I remain unconvinced
by their reasoning.  No doubt the effect they describe is
not non-existant, but I question whether it has as much
impact as proposed.

Note also in the datasets that *overperformers* *underrated*
their performance.

Also, the research was done on *particularly* subjective
subject matter!  Take the "humor" category for example.

I also think this is precisely the kind of experiment that
has to be made *very* objective to be at all useful. It's so
easy to sensationalize: it plays on your self-worth fears,
your cynicism, and your arrogance *at the same time*.  It's
hard to imagine that anyone accepting the results is doing
so for scientific reasons.

Frankly this paper sounds like a bid for the "Journal of
Irreproducible Results" that somehow got accidentally
submitted to a serious journal (of course, I don't know
enough about psychology journals to know if that is really
a "serious journal", but I'm taking it at face value).

Of course, you *could* conclude that I'm just "unskilled and
unaware of it" for believing this -- but that's the beauty
of all self-reinforcing delusions, isn't it. ;-)

Cheers,
Terry


 -- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From steve at REMOVETHIScyber.com.au  Fri Feb  3 06:51:15 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 03 Feb 2006 22:51:15 +1100
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<drvd56$nb3$1@wake.carmen.se>
Message-ID: <pan.2006.02.03.11.51.14.809230@REMOVETHIScyber.com.au>

On Fri, 03 Feb 2006 12:00:52 +0100, Magnus Lycka wrote:

> Today, Python has a syntactic shortcut. If 'a' is an
> instance of class 'A', a.f(x,y,z) is a shortcut for
> A.f(a,x,y,z). 

It is easy to work around (break?) that behaviour:

class A(object):
    def foo(self):
        print "normal method foo"

a = A()

def foo(self):
    print "special method foo"

from new import instancemethod
a.foo = instancemethod(foo, a)

Now we can see that a.foo() is no longer a shortcut for A.foo(a):

>>> a.foo()
special method foo
>>> A.foo(a)
normal method foo


So instances can have methods that they don't inherit from their class!



-- 
Steven.



From http  Sun Feb 26 19:19:50 2006
From: http (Paul Rubin)
Date: 26 Feb 2006 16:19:50 -0800
Subject: Is Python a Zen language?
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
	<1140931766.200951.321320@t39g2000cwt.googlegroups.com>
	<1140963005.123017.90890@t39g2000cwt.googlegroups.com>
	<1140986927.452802.241330@e56g2000cwe.googlegroups.com>
Message-ID: <7xpsl9y7o9.fsf@ruckus.brouhaha.com>

"Crutcher" <crutcher at gmail.com> writes:
> No, I don't disagree that people do this. The history of "Zen and the
> Art of X" dates from "Zen and the Art of Motorcycle Repair", which is
> actually about Zen and Motorcycles. 

Actually "Zen in the Art of Archery" by Eugen Herrigel, which was
about an actual classical Zen approach to archery.  The motorcycle
book title was sort of a homage but the contents are totally
different.


From swrittenb at gmail.com  Wed Feb  8 21:27:19 2006
From: swrittenb at gmail.com (Swroteb)
Date: 8 Feb 2006 18:27:19 -0800
Subject: Pulling all n-sized combinations from a list
In-Reply-To: <1139441694.062827.186910@o13g2000cwo.googlegroups.com>
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>
	<7x7j85czje.fsf@ruckus.brouhaha.com>
	<1139436433.439927.175100@g47g2000cwa.googlegroups.com>
	<7xr76dwiy3.fsf@ruckus.brouhaha.com>
	<1139440532.158500.16930@z14g2000cwz.googlegroups.com>
	<1139441694.062827.186910@o13g2000cwo.googlegroups.com>
Message-ID: <1139452039.667629.16910@g44g2000cwa.googlegroups.com>

Yes, certainly.  I hadn't done any profiling up to that point, but it
really seemed like my biggest time sink was inefficiently losing time
in obtaining the combinations.



From limodou at gmail.com  Tue Feb  7 22:09:58 2006
From: limodou at gmail.com (limodou)
Date: Wed, 8 Feb 2006 11:09:58 +0800
Subject: module with __call__ defined is not callable?
In-Reply-To: <2773CAC687FD5F4689F526998C7E4E5F4DB920@au3010avexu1.global.avaya.com>
References: <2773CAC687FD5F4689F526998C7E4E5F4DB920@au3010avexu1.global.avaya.com>
Message-ID: <505f13c0602071909l12c1892chf4e0f5e0fa2f4cf9@mail.gmail.com>

On 2/8/06, Delaney, Timothy (Tim) <tdelaney at avaya.com> wrote:
> adam johnson wrote:
>
> > Hi All.
> > I was wondering why defining a __call__ attribute for a module
> > doesn't make it actually callable.
>
> For the same reason that the following doesn't work
>
>     class A (object):
>
>         def __init__(self):
>             self.__call__ = A.hello
>
>         def hello (self):
>             print 'Hello, world!'
>
>     a = A()
>     a()
>
>     Traceback (most recent call last):
>       File "D:\Python\modules\testclasscall.py", line 10, in ?
>         a()
>     TypeError: 'A' object is not callable
>
> The __call__ attribute must be defined on the class (or type) - not on
> the instance. A module is an instance of <type 'module'>.
>

A very easy example:

 >>> class A:
 ...     def __call__(self):
 ...         print 'call'
 ...
 >>> a = A()
 >>> a()
 call

I'm not sure that module can also has __call__() method just like
class. I havn't seen the way before.

--
I like python!
My Blog: http://www.donews.net/limodou
NewEdit Maillist: http://groups.google.com/group/NewEdit


From scott.daniels at acm.org  Thu Feb  9 08:29:48 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Thu, 09 Feb 2006 05:29:48 -0800
Subject: module with __call__ defined is not callable?
In-Reply-To: <43eb1fad$1_3@newspeer2.tds.net>
References: <mailman.1580.1139367500.27775.python-list@python.org>
	<pan.2006.02.08.10.21.24.46790@REMOVETHIScyber.com.au>
	<43ea0efd$1@nntp0.pdx.net>
	<slrndum60m.10s.apardon@rcpc42.vub.ac.be>
	<43eb1fad$1_3@newspeer2.tds.net>
Message-ID: <43eb4293@nntp0.pdx.net>

Kent Johnson wrote:
> Antoon Pardon wrote:
>> This make me wonder. Would it be possible to do something with
>> metaclasses so that after
>>
>>      class SomeClass(MetaClass):
>>         ...
>>
>> SomeClass() will be equivalent to MetaClass.__call__(SomeClass)
> 
> I think that's already what happens. IIUC type.__call__ implements the 
> standard class creation calling __new__ and __init__.

You are a layer of abstraction off.
     class SomeClass(MetaClass):
         ...
creates a subclass of MetaClass, (the superclass of SomeClass).
SomeClass is still an instance of type (assuming new-style classes).

     class FunnyType(type):
         ...
defines a new metaclass, which can affect how instances of FunnyType
behave.

For a ridiculous example:
     class FunnyType(type):
         def __call__(self, *args, **kwargs):
             if 'please' in kwargs and kwargs['please']:
                 kwargs.pop('please')
                 return super(FunnyType, self).__call__(*args, **kwargs)
             print 'Nope, use your words:', args, kwargs

     class SomeClass:
         __metaclass__ = FunnyType

         def __repr__(self):
             print 'Lucky_%s' % id(self)

OK, now:
     v = SomeClass(please=True)
     print v
works, but
     v = SomeClass()
doesn't, nor does:
     v = SomeClass(please=False)

Think aboutwhat this code should do before running it, the mental
exercise is fun.

--Scott David Daniels
scott.daniels at acm.org


From fuzzyman at gmail.com  Wed Feb  1 11:18:46 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 1 Feb 2006 08:18:46 -0800
Subject: urllib2 - My POST Request just isn't working right
In-Reply-To: <mailman.1317.1138810288.27775.python-list@python.org>
References: <312cfe2b0602010753uc363a85wb3f87cf2677993a2@mail.gmail.com>
	<mailman.1317.1138810288.27775.python-list@python.org>
Message-ID: <1138810726.547315.82890@f14g2000cwb.googlegroups.com>

That would certainly be an error. *Also*, urllib2 adds the host header
for you, no need to set it.

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml



From om at oliviermigeon.com  Fri Feb 24 17:17:26 2006
From: om at oliviermigeon.com (Olivier)
Date: Fri, 24 Feb 2006 23:17:26 +0100
Subject: Best python module for Oracle, but portable to other RDBMSes
In-Reply-To: <1140818561.458171.237850@p10g2000cwp.googlegroups.com>
References: <1140818561.458171.237850@p10g2000cwp.googlegroups.com>
Message-ID: <43ff852a$0$11074$636a55ce@news.free.fr>

dananrg at yahoo.com a ?crit :
> I'm a little confused about what's out there for database modules at:
> 
>   http://python.org/topics/database/modules.html
> 
> What I'd like to do is use Python to access an Oracle 9.X database for
> exporting a series of tables into one aggregated table as a text file,
> for import into a mainframe database. The catch is that I'd like to
> write code that wouldn't need to be changed (much) if we switched from
> Oracle to some other RDBMS (still need to export out as a text file for
> import to the mainframe database.
> 
> Looks like I'd probably want to use something that conforms to the
> DB-API 2.0. 


You want to use cx_Oracle :

http://www.python.net/crew/atuining/cx_Oracle/index.html

which is nowadays the very best python Oracle driver.

	Olivier





From john at totalrekall.co.uk  Mon Feb  6 06:06:19 2006
From: john at totalrekall.co.uk (John Dean)
Date: Mon, 6 Feb 2006 11:06:19 GMT
Subject: Python V2.4.2 source code
References: <43e710de$0$23286$db0fefd9@news.zen.co.uk>
	<O5FFf.1082$pC6.83@fe11.lga>
Message-ID: <43e72c34$0$5007$db0fefd9@news.zen.co.uk>

Hi

I downloaded what I thought was the source code from
http://www.python.org/2.4.2/python-2.4.2.tgz

-- 
Best Regards
John


From mtobis at gmail.com  Sun Feb 12 13:59:04 2006
From: mtobis at gmail.com (Michael Tobis)
Date: 12 Feb 2006 10:59:04 -0800
Subject: Is python very slow compared to C
In-Reply-To: <pan.2006.02.12.14.13.10.48628@REMOVETHIScyber.com.au>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<pan.2006.02.12.01.03.10.918456@REMOVETHIScyber.com.au>
	<1139751088.720150.80010@g43g2000cwa.googlegroups.com>
	<pan.2006.02.12.14.13.10.48628@REMOVETHIScyber.com.au>
Message-ID: <1139770744.414840.13870@z14g2000cwz.googlegroups.com>

> Read his post again. He didn't ask a specific question at all, and he certainly didn't mention execution speed.

agreed

> He asked a vague, meaningless question about whether Python was "slow compared to C".

No, that is both wrong and gratuitously harsh. He had heard vague
meaningless complaints about whether Python was "slow compared to C"
and asked us to "pinpoint the issue", i.e., to determine in what sense
the allegation might be true. That is a precise and meaningful question
and being asked in a commendable fashion.

mt



From gene.tani at gmail.com  Tue Feb 21 19:32:40 2006
From: gene.tani at gmail.com (gene tani)
Date: 21 Feb 2006 16:32:40 -0800
Subject: deriving from float or int
In-Reply-To: <1140502954.660120.174160@g14g2000cwa.googlegroups.com>
References: <1140502954.660120.174160@g14g2000cwa.googlegroups.com>
Message-ID: <1140568359.992200.7680@o13g2000cwo.googlegroups.com>


Russ wrote:
> Does it ever make sense to derive a class from a basic type such as
> float or int? Suppose, for example, that I want to create a class for
> physical scalars with units. I thought about deriving from float, then
> adding the units. I played around with it a bit, but it doesn't seem to
> work very well. Am I missing something here? Thanks.

you could look at how sciPy does it:
http://starship.python.net/~hinsen/ScientificPython/



From a.schmolck at gmail.com  Mon Feb 20 20:04:38 2006
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: 21 Feb 2006 01:04:38 +0000
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<yfspsljp321.fsf@oc.ex.ac.uk>
	<1140425017.101462.117380@g47g2000cwa.googlegroups.com>
Message-ID: <yfslkw5msih.fsf@oc.ex.ac.uk>

"Michele Simionato" <michele.simionato at gmail.com> writes:

> Alexander Schmolck wrote:
> > As common lisp and scheme demonstrate you can have high level of dynamism (and
> > in a number of things both are more dynamic than python) and still get very
> > good performance (in some cases close to or better than C).
> 
> Just for personal enlightment, where do you think Lisp is more dynamic
> of Python?
> Can you new name a few features?

Sure (I'm assuming that by lisp you mean common lisp):

- development model

  - by default the development model is highly interactive and you can
    redefine all sorts of stuff (functions, methods, classes even the syntax)
    without having to start over from scratch (you can also save the current
    state of affairs as an image). By contrast changing modules or classes in
    interactive python sessions is rather tricky to do without screwing things
    up, and it doesn't support images, so sessions tend to be much more
    short-lived.

    Emacs+slime also offers more powerful functionality than emacs+python mode
    (autocompletion, jumping to definitions, various parallel sessions or
    remotely connecting to running applications via sockets etc.)

- hot-patching
   
  - partly as a consequence of the above, you can also arrange to hot-patch
    some running application without too much trouble (IIRC Graham claims in
    one of his essays that one of his favorite pranks was fixing a bug in the
    application whilst on the phone to the customer as she reported it and
    then telling her that everything in fact seemed to work fine and to try
    again)

- error handling:

  - by default you end up in the debugger if something goes wrong and in many
    cases you can correct it in place and just continue execution (if you've
    ever had some long numerical computation die on plotting the results
    because of a underflow as you exponentiate to plot in transformed
    coordinates, you'd appreciate being able to just return 0 and continue)

  - Apart from "usual" exception handling CL has much more powerful resumable
    exceptions that offer far more fine grained error handling possibiliies.

    For more info let me recommend the chapter from Peter Seibel's excellent
    "practical common lisp" (available in print, and also freely online):

    <http://www.gigamonkeys.com/book/beyond-exception-handling-conditions-and-restarts.html>

    (The whole book is a great ressource for people who want to have quick
    play with common lisp and see how it's features can be leveraged for real
    applications (such as html creation, or writing an mp3 server or id3
    parser). Peter also makes an easy to install, preconfigured "lispbox"
    bundle of Emacs+a free lisp implementation available on his web-page).

- OO: 

  - You know this already, but I'd argue that multimethods and method
    combinations give you more dynamism then class-centric OO.

  - Also, if you change the definition of a class all existing instances will
    be updated automatically. You can get a similar effect in python by
    laboriously mutating the class, provided it doesn't use __slots__ etc, but
    that is more brittle and also more limited -- for example, in CL you can specify what
    happens to instances when the class is updated.

- chameleon like nature:

  It's much easier to make CL look like something completely different (say prolog
  or some indentation based, class-centric language like python) than it would
  be with python. In particular:

  - there are no reserved keywords

  - you can e.g. implement new syntax like python style """-strings easily
    (I've done so in fact) with reader macros. Indentation based syntax should
    also be possible along the same lines, although I haven't tried.

  - you can introduce pretty much any sort of control structure you might
    fancy and you can carry out very sophisticated code transformations behind
    the scenes.

- finally, with Lispmachines there at least used to be whole operating systems
  written all the way down in lisp and according to all the testimony you
  could interactively modify quite basic system behaviour. The only extant
  systems that come even remotely close would be smalltalks, but even squeak
  which is incredibly malleable and a cross-platform mini-OS in its own right
  uses the host OS for many basic tasks.


'as


From gabriel.becedillas at gmail.com  Mon Feb  6 14:38:06 2006
From: gabriel.becedillas at gmail.com (gabriel.becedillas at gmail.com)
Date: 6 Feb 2006 11:38:06 -0800
Subject: Replace a module variable with a function call
In-Reply-To: <mailman.1517.1139254453.27775.python-list@python.org>
References: <1139252075.497468.137100@g44g2000cwa.googlegroups.com>
	<mailman.1514.1139252631.27775.python-list@python.org>
	<1139253593.106535.175310@g47g2000cwa.googlegroups.com>
	<mailman.1517.1139254453.27775.python-list@python.org>
Message-ID: <1139254686.313598.282240@z14g2000cwz.googlegroups.com>

Your post didn't provide any help at all, it was a useless sarcastic
post and I'm a very sensible person.



From zefria at gmail.com  Mon Feb 20 05:48:07 2006
From: zefria at gmail.com (Zefria)
Date: 20 Feb 2006 02:48:07 -0800
Subject: Quesion about the proper use of __slots__
In-Reply-To: <1140428016.170547.315710@g47g2000cwa.googlegroups.com>
References: <1140424508.393412.79140@o13g2000cwo.googlegroups.com>
	<43f9825e$0$4777$636a55ce@news.free.fr>
	<1140426860.033363.237150@o13g2000cwo.googlegroups.com>
	<dtc219$h0a$01$1@news.t-online.com>
	<1140428016.170547.315710@g47g2000cwa.googlegroups.com>
Message-ID: <1140432487.272405.297100@f14g2000cwb.googlegroups.com>

Well, my computer tends to run at about 497 to 501 out of 504 MB of RAM
used once I start up Gnome, XMMS, and a few Firefox tabs, and I'd
prefer not to see things slipping into Swap space if I can avoid it,
and the fighter data would be only part of a larger program.

And as I said, learning how to use __slots__ is important enough to
hazard a premature guess this time around. If I mess up, the worst that
happens is that I have to write down a new variable name in two places
instead of one now.



From steve at holdenweb.com  Sat Feb 11 02:30:03 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 11 Feb 2006 02:30:03 -0500
Subject: "Is" is "is" [was: any way to customize the is operator?]
In-Reply-To: <1139618017.571180.23790@g47g2000cwa.googlegroups.com>
References: <1138342643.119111.281900@g14g2000cwa.googlegroups.com>	<mailman.1123.1138346366.27775.python-list@python.org>	<1138346774.949296.192520@g14g2000cwa.googlegroups.com>	<pan.2006.01.27.11.01.46.829464@REMOVETHIScyber.com.au>
	<1139618017.571180.23790@g47g2000cwa.googlegroups.com>
Message-ID: <dsk3pr$v6p$1@sea.gmane.org>

Lonnie Princehouse wrote:
>>Why did you want to customize "is"?
> 
> 
> Well, mostly out of principle ;-)
> 
> But also because I'm wrapping a C library which passes around C structs
> which are wrapped in shim C++ classes for a Boost.Python layer.  Boost
> Python does a marvelous job of translating between Python and C++ data
> types; when a C structure is returned, it magically translates that
> structure into a Python wrapper.   The problem is that a _new_ Python
> wrapper is created every time a pointer is returned, even if a  wrapper
> already exists for that particular pointer.
> 
> To illustrate:  Suppose you have a function in C++ which is a simple
> identity function, e.g.
> 
> template <typename T>
> T *identity (T *x) {
>     return x;
> }
> 
> Calling the wrapped version of this function from Python will produce a
> Python wrapper which represents the same underlying C++ object, but is
> not actually the same Python object:
> 
> 
>>>>b = identity(a)
>>>>b is a
> 
> False
> 
> I wanted to override the behavior of "is" so that (a is b) would be
> True --- which shouldn't have caused a problem, since the wrapper
> class's attributes are read-only from Python.  As it is, I've overriden
> __cmp__ and __hash__, so at least I get the correct dictionary behavior
> 
> 
>>>>mydict = { a : 'something' }
>>>>b = identity(a)
>>>>b in mydict
> 
> True
> 
> It's quite possible that there is some way to do this correctly from
> the Boost.Python side of things... my understanding of how to use
> Boost.Python is minimal.
> 
I will adopt my usual stance here of unequivocally stating that there is 
no way you can do what you want to. In the case of the "is" operator you 
can only expect truth when the left- and right-hand side operands refer 
to the same object.

This strategy is usually sound: typically, before the metaphorical ink 
has dried on my post some upstart comes along to prove me completely 
wrong. So, I have done about all I can to help you. It's up to the rest 
of the community now to prove me wrong (as they have so many times in 
the past :).

regards
  Steve

PS: I'm afraid I couldn't resisit shortening yur odds somewhat by doing 
what I usually fail to do and examining the source of is_() in 
Modules/operator.c. I'm afraid it's not looking good ... the result of 
"is" does appear to depend only on the memory addresses of the two 
operands being the same:

                 result = (a1 == a2) ? Py_True : Py_False;
                 Py_INCREF(result);

sorry ...
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From devlai at gmail.com  Wed Feb 15 23:43:52 2006
From: devlai at gmail.com (Devan L)
Date: 15 Feb 2006 20:43:52 -0800
Subject: Safe Python Execution
In-Reply-To: <1140058830.477028.26620@f14g2000cwb.googlegroups.com>
References: <1140058830.477028.26620@f14g2000cwb.googlegroups.com>
Message-ID: <1140065032.282009.103130@o13g2000cwo.googlegroups.com>


Graham wrote:
> I've been messing around with trying to get a small sandbox like
> environment where i could execute python code in a "safe" way.
> Basically what the old restricted execution module attempted to do.
> I've written a small amount of code to get custom interpreter running,
> but i'm not really sure if its safe.
>
> The way i'm controlling functionality is with some games and exec, so
> if 'code' was the text code you wanted to execute i run:
>
> exec code in {'__builtins__':None"}
>
> obviously this doesn't give you much to play with, but it does remove
> file access and importing as far as i can tell. Can anyone think of a
> hack around this? I assume if it was this easy it would be a module
> already but i figured i would ask.

You need to remove reload, replace __import__, disable __subclasses__
(not convenient nor portable because you need to do it in the source.
Shouldn't it be restricted in restricted mode?). That removes most
glaring security holes, I think. If you need to touch any of the
attributes of the objects in the sandbox, you might want to remove
properties. I wouldn't recommend exposing any objects outside of the
sandbox to the sandbox, either.

Zope also has some cool viral proxy thing that I don't understand that
you might want to look into.



From Ido.Yehieli at gmail.com  Tue Feb 28 14:55:07 2006
From: Ido.Yehieli at gmail.com (Ido Yehieli)
Date: 28 Feb 2006 11:55:07 -0800
Subject: Looking for Pythonic Examples
References: <du24t0$1cp$03$1@news.t-online.com>
Message-ID: <1141156507.882381.263920@i40g2000cwc.googlegroups.com>

This one is from our very own BDFL, behold- wget implemented in 7 lines
of python code:

import sys, urllib
def reporthook(*a): print a
for url in sys.argv[1:]:
     i = url.rfind('/')
     file = url[i+1:]
     print url, "->", file
     urllib.urlretrieve(url, file, reporthook)



From steve at hastings.org  Fri Feb 24 23:24:30 2006
From: steve at hastings.org (Steve R. Hastings)
Date: Fri, 24 Feb 2006 20:24:30 -0800
Subject: list assignment using concatenation "*"
References: <1140832774.530010.251930@j33g2000cwa.googlegroups.com>
	<pan.2006.02.25.02.24.53.868487@hastings.org>
Message-ID: <pan.2006.02.25.04.24.27.833725@hastings.org>

I suggest you should build your list using a list comprehension:

>>>a = [[0]*3 for i in range(3)]
>>>a
[[0, 0, 0], [0, 0, 0], [0, 0, 0]]
>>>a[0][1] = 1
[[0, 1, 0], [0, 0, 0], [0, 0, 0]]

-- 
Steve R. Hastings    "Vita est"
steve at hastings.org    http://www.blarg.net/~steveha



From apardon at forel.vub.ac.be  Thu Feb  9 05:13:13 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 9 Feb 2006 10:13:13 GMT
Subject: module with __call__ defined is not callable?
References: <mailman.1580.1139367500.27775.python-list@python.org>
	<pan.2006.02.08.10.21.24.46790@REMOVETHIScyber.com.au>
	<1139394463.255902.168960@f14g2000cwb.googlegroups.com>
	<mailman.1591.1139400885.27775.python-list@python.org>
	<slrnduk07b.117.apardon@rcpc42.vub.ac.be>
	<mailman.1625.1139432658.27775.python-list@python.org>
Message-ID: <slrndum5dp.10s.apardon@rcpc42.vub.ac.be>

Op 2006-02-08, Steve Holden schreef <steve at holdenweb.com>:
> Antoon Pardon wrote:
>> Op 2006-02-08, Steve Holden schreef <steve at holdenweb.com>:
>> 
>>>Why should a module be callable? What's the advantage? Should we be able 
>>>to add two modules together, yielding a module that contains all the 
>>>code of both modules? What happens if I multiply a module by two - 
>>>presumably the result should be the same as adding a module to itself? 
>>>Perhaps we should be able to divide a module by a function?
>>>
>>>The pursuit of orthogonality, while admirable, can lead to insanity if 
>>>pushed too far.
>> 
>> 
>> This is not an argument. This doesn't give a clue about where to stop
>> this pursuit en when to go on.
>> 
> Well, let's say we should stop short of unsane behavior. That's a phrase 
> you should understand.

I don't agree, what some consider insane is a stroke of genius by
someone else.

-- 
Antoon Pardon


From crutcher at gmail.com  Sun Feb 26 15:53:07 2006
From: crutcher at gmail.com (Crutcher)
Date: 26 Feb 2006 12:53:07 -0800
Subject: Tail Call Optimization as a Decorator
In-Reply-To: <1140986376.438905.95360@t39g2000cwt.googlegroups.com>
References: <1140981639.315995.34860@i39g2000cwa.googlegroups.com>
	<1140986376.438905.95360@t39g2000cwt.googlegroups.com>
Message-ID: <1140987187.726096.112840@p10g2000cwp.googlegroups.com>

I've tossed it to python-dev, but how do I submit it to the cookbook?



From donn at drizzle.com  Mon Feb 20 11:54:34 2006
From: donn at drizzle.com (Donn Cave)
Date: Mon, 20 Feb 2006 16:54:34 -0000
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com>
	<mailman.2160.1140440898.27775.python-list@python.org>
Message-ID: <1140454473.335788@jetspin.drizzle.com>

Quoth Carl Friedrich Bolz <cfbolz at gmx.de>:
| Torsten Bronger wrote:
|> Well, I think that it's fair to say that there are by principle deep
|> run time differences between CPython and, say, a typical
|> C++-compiled program.  Your definition would not reproduce that.  I
|> think it's also fair to say that these differences should be known
|> if somebody tries to find the best tool for a job.  After all, they
|> include advantages, too.
|> 
|> My definiton would be that an interpreted language has in its
|> typical implementation an interpreting layer necessary for typical
|> hardware.  Of couse, now we could discuss what is "typical",
|> however, in practice one would know it, I think.  In case of Python:
|> CPython and all important modern processors.
|
| Well, if we take any modern Intel/AMD chip (which could be described as 
| "typical), a C++ program would fit the "interpreted" definition, since 
| the processor does not execute the machine code directly but rather 
| breaks it down into smaller microcode instruction -- a process that 
| could be described as intepretation.

That's irrelevant, though.  Note, "has in its typical implementation".
Your processor didn't come along with your C++ compiler, it's not part
of its implementation or even necessarily relevant to it - maybe some
potential for optimization, but the only hard and fast requirement is
that the processor must execute its instruction set as documented.

The reason this isn't just an abstruse philosophical argument where it
makes sense for us to obtusely cling to some indefensible point of view,
is that as the man points out, there are differences that we can't hide
forever from potential Python users.  The most obvious to me is that
your Python program essential includes its interpreter - can't go anywhere
without it, and any change to the interpreter is a change to the program.
There are various strategies to address this, but pretending that Python
isn't interpreted is not one of them.

	Donn Cave, donn at drizzle.com


From fidlee at gmail.com  Thu Feb 23 13:00:47 2006
From: fidlee at gmail.com (fidlee)
Date: 23 Feb 2006 10:00:47 -0800
Subject: need help regarding compilation
In-Reply-To: <46694pF9ms9bU1@uni-berlin.de>
References: <1140714583.014871.194640@p10g2000cwp.googlegroups.com>
	<46694pF9ms9bU1@uni-berlin.de>
Message-ID: <1140717647.853105.133420@u72g2000cwu.googlegroups.com>


> You really have a book about python that doesn't mention that functions
> definitions are closed by a colon? I doubt that...


It is not python but jython. But I dont think that the syntax of both
of them are different.
I managed to download the tutorial of jython from the IBM website. I am
wondering as to how they could put in wrong syntaxes in their tutorials
!!



From scott.daniels at acm.org  Sat Feb  4 06:15:29 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sat, 04 Feb 2006 03:15:29 -0800
Subject: fairly large webapp: from Java to Python. experiences?
In-Reply-To: <prVEf.7358$MF1.4951@fe08.lga>
References: <1139005746.363918.267370@g47g2000cwa.googlegroups.com>
	<1139018653.508049.182020@g43g2000cwa.googlegroups.com>
	<prVEf.7358$MF1.4951@fe08.lga>
Message-ID: <43e48bba$1@nntp0.pdx.net>

John M. Gabriele wrote:
> brianhray at gmail.com wrote:
>> But once it is
>> there, Python is a good choice for web apps. Java is slow
> 
> Slow? They're both dynamic languages, but Java is statically
> typed (with less work to do at runtime). For long-running processes,
> I'd guess that Java bytecode executes faster than Python bytecode.

Well, perhaps yes, but not so if you count the fact that recoding
is so easy that you can race several implementations of the same
thing to see which trade-offs work.  Java may run the one algorithm
you decide to write faster than Python will run the same thing,
but in Python you may race five algorithms and keep the fastest.
Using programmer resources effectively is Python's secret sauce.

--Scott David Daniels
scott.daniels at acm.org


From bradfordh at gmail.com  Tue Feb 14 20:39:40 2006
From: bradfordh at gmail.com (Tempo)
Date: 14 Feb 2006 17:39:40 -0800
Subject: Python and ASP
In-Reply-To: <1139961021_9771@sp6iad.superfeed.net>
References: <1139958137.733403.33640@g44g2000cwa.googlegroups.com>
	<1139961021_9771@sp6iad.superfeed.net>
Message-ID: <1139967580.352137.246320@f14g2000cwb.googlegroups.com>

It still doesn't work. I fixed that one error that you pointed out
Roger Upole, but it still isn't working. All I did was copy and past
the code above, plus Roger's fix, into Notepad2 and saved it as a
'.asp'. When I opened it in Firefox, all that showed up was the source
code of the file. It seems like it is reading the '.asp' file as a text
file in the web browser. Any further ideas? Thanks.



From bobrien18 at yahoo.com  Wed Feb  1 21:51:12 2006
From: bobrien18 at yahoo.com (KraftDiner)
Date: 1 Feb 2006 18:51:12 -0800
Subject: nDimensional sparse histogram in python.
Message-ID: <1138848672.791908.90050@g44g2000cwa.googlegroups.com>

Hi, I wrote a C++ class that implements an n dimensional histogram in
C++, using stl maps and vectors.  I want to code this up now in Python
and would like some input from this group.

The C++ class was VERY simple..

        std::map<std::vector<unsigned short>, unsigned long> histo;

Say for example I want a 3D histogram then std::vector<unsigned short>
would contains
the x, y, and z points in space and the unsigned long is the number of
counts.
If I want to know the value at a specific point in space I pass in a
vector [3,2,1] and if
it is found in the map then the count is returned other wise zero is
returned.
If I want to increment a count then histo[vector]++ will either set the
count to 1 or increment
the count if it is found...

So as you can see this is a very simple way to implement a multi
dimensional sparse histogram.

I'm thinking that in python this must also be as simple as a
dictionary, where the key is the vector x,y,z and the value is the
count.

My python is ok, but not the best and I was hoping some one here might
want to help me out?
This doesn't work for example...

histo = {[0,0,0]:1, [0,0,1]:2}
Would indicate that there is one sample at 0,0,0 and two samples at
0,0,1
but python tells me TypeError: list objects are unhashable

So any suggestions would be welcome.
TIA.



From doug.bromley at gmail.com  Tue Feb 21 14:27:55 2006
From: doug.bromley at gmail.com (Doug Bromley)
Date: Tue, 21 Feb 2006 19:27:55 +0000
Subject: warning for google api users
In-Reply-To: <5175a81c0602211111v6408b359u94ccfa63691fdc3c@mail.gmail.com>
References: <5175a81c0602211111v6408b359u94ccfa63691fdc3c@mail.gmail.com>
Message-ID: <288425520602211127j182f1d04i1d2d5d7ec5590119@mail.gmail.com>

Producing a SERPS scraper for Google would be very easy and possible in
about 10-15 lines of code.  However, its against the Google terms of service
and if they decide to bite you for breaching them then you'll be in
trouble.  Its also a reason you'll not likely find one that trumpets its
existence very much as the site promoting it would probably be taken off the
Google index - severely effecting visitors.

On 2/21/06, Gabriel B. <gabriel.barros at gmail.com> wrote:
>
> the google webservices (aka google API) is not even close for any kind
> of real use yet
>
> if you search for the same term 10 times, you get 3 mixed totals. 2
> mixed result order. and one or two "502 bad gateway"
>
> i did an extensive match agains the API and the regular search
> service. the most average set of results:
>
> results 1-10; total: 373000
> results 11-20; total: 151000
> results 21-30; total: 151000
> results 31-40; total: 373000
> results 41-50; total: 373000
> results 51-60; total: 373000
> results 61-70; total: 151000
> ( 502 bad gateway. retry)
> results 71-80; total: 373000
> results 81-90; total: 151000
> ( 502 bad gateway. retry)
> results 91-100; total: 373000
>
> on the regular google search, total:  2,050,000 (for every page, of
> course)
>
> besides that, the first and third result on the regular google search,
> does not apear in the 100 results from the API in this query, but this
> is not average, more like 1 chance in 10 :-/
>
> So, no matter how much google insists that this parrot is sleeping,
> it's simply dead.
>
>
> now, what i presume that is happening, is that they have a dozen of
> machine pools, and each one has a broken snapshot of the production
> index (probably they have some process to import the index and or it
> explode in some point or they simply kill it after some time). and
> they obviously don't run that process very often.
>
> Now... anyone has some implementation of pygoogle.py that scraps the
> regular html service instead of using SOAP? :)
>
> Gabriel B.
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From aleaxit at yahoo.com  Sat Feb 11 15:19:47 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sat, 11 Feb 2006 12:19:47 -0800
Subject: python 2.5 and hashlib
References: <dslepr$bld$1@solaris.cc.vt.edu>
Message-ID: <1halgtq.1sv413qle9bhdN%aleaxit@yahoo.com>

rtilley <rtilley at vt.edu> wrote:

> Is there a road map for python a 2.5 releases yet? I'd like to begin 
> testing the new hashlib module with some old scripts I have that 
> currently use the md5 and sha modules.

http://python.org/peps/pep-0356.html -- but it's still a draft, being
discussed in the last few days on python-dev.


Alex


From sjdevnull at yahoo.com  Tue Feb 28 12:58:47 2006
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 28 Feb 2006 09:58:47 -0800
Subject: PEP 354: Enumerations in Python
In-Reply-To: <87accdplbj.fsf@rose.polar.local>
References: <87accdplbj.fsf@rose.polar.local>
Message-ID: <1141149527.078533.98600@i40g2000cwc.googlegroups.com>

Ben Finney wrote:
> PEP 354: Enumerations in Python has been accepted as a draft PEP. The
> current version can be viewed online:

-1 on the proposal as a builtin, -0 on including any kind of
enumeration in the standard library unless I can see a compelling use
case; Carl Banks' approach seems more flexible and doesn't add yet more
to the burgeoning Python distro.

Add me to the "me, too!" list of people who think enumerations would be
better off without > or < comparison.



From michaeltaft at gmail.com  Thu Feb  9 02:35:53 2006
From: michaeltaft at gmail.com (mwt)
Date: 8 Feb 2006 23:35:53 -0800
Subject: 450 Pound Library Program
In-Reply-To: <43ea2fbf$0$31862$626a54ce@news.free.fr>
References: <1139351498.090768.82270@o13g2000cwo.googlegroups.com>
	<43e9f1e1$0$612$636a15ce@news.free.fr>
	<1139411880.032250.181300@g43g2000cwa.googlegroups.com>
	<dsd4to$umq$1@wake.carmen.se>
	<43ea2fbf$0$31862$626a54ce@news.free.fr>
Message-ID: <1139470553.811335.245310@g47g2000cwa.googlegroups.com>

A million thanks for in-depth critique. I look forward to figuring out
half of what you're talking about ;)



From oliphant.travis at ieee.org  Tue Feb 28 04:04:08 2006
From: oliphant.travis at ieee.org (Travis E. Oliphant)
Date: Tue, 28 Feb 2006 02:04:08 -0700
Subject: Scientific Computing with NumPy
In-Reply-To: <1140453857.206396.213050@z14g2000cwz.googlegroups.com>
References: <ds7bvh$ab1$2@gemini.csx.cam.ac.uk>	<1140224495.798167.248550@z14g2000cwz.googlegroups.com>	<mailman.2086.1140244636.27775.python-list@python.org>
	<1140453857.206396.213050@z14g2000cwz.googlegroups.com>
Message-ID: <du13md$k0a$1@sea.gmane.org>

greg.landrum at gmail.com wrote:
> Terry Reedy wrote:
> 
>>"kpp9c" <kp8 at mac.com> wrote in message
>>news:1140224495.798167.248550 at z14g2000cwz.googlegroups.com...
>>
>>>Numeric, Numarray, & Numpy... some one stick a screwdriver in my
>>>forehead and end the madness that Numeric has become.
>>
>>>For crying all night! Numpy was Numeric's nickname
>>
>>Given that NumPy *is* an updated version of Numeric, with the same basic
>>interface, I think the name quite appropriate.  It also works well as a
>>partner for SciPy.

Exactly!

I suppose people must vent, but the truth is that satisfying the 
diversity of scientific Python users is *very* hard.

NumPy *is* trying to do something about the confusion between Numeric 
and Numarray.   I'm sorry you don't like the name, but it was properly 
discussed and a host of other names were suggested before settling on 
NumPy as the *least bad*.

Yes, it will be confusing for a few months, but then it will probably be 
*less* confusing as people realize that NumPy *is* Numeric 3K

The interface is not that different.  For example, you can usually 
compile extensions simply by replacing Numeric/arrayobject.h   with
numpy/arrayobject.h

If you don't like things then start suggesting specific improvements at 
numpy-discussion at lists.sourceforge.net instead of just ranting on the 
python list which most of us don't have the time to read anyway (notice 
how late I'm responding to this...)

-Travis




From kylotan at gmail.com  Tue Feb 21 04:13:51 2006
From: kylotan at gmail.com (Ben Sizer)
Date: 21 Feb 2006 01:13:51 -0800
Subject: Python vs. Lisp -- please explain
In-Reply-To: <43FAD2C2.7080908@REMOVEMEcyber.com.au>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com>
	<mailman.2160.1140440898.27775.python-list@python.org>
	<1140454473.335788@jetspin.drizzle.com>
	<pan.2006.02.20.21.59.12.636908@REMOVETHIScyber.com.au>
	<1140490302.639049@jetspin.drizzle.com>
	<43FAD2C2.7080908@REMOVEMEcyber.com.au>
Message-ID: <1140513231.192438.105250@f14g2000cwb.googlegroups.com>

Steven D'Aprano wrote:
> The "Python is both interpreted and compiled" camp, who
> believe that both steps are equally important, and to
> raise one over the other in importance is misleading.
> That's why Sun doesn't describe Java as interpreted,
> but as byte-code compiled. They did that before they
> had JIT compilers to compile to machine code.
> Consequently nobody thinks of Java source having to be
> parsed, and parsed, and parsed, and parsed again.

They also described it that way to help marketing, and I don't think
that should be overlooked. They would have known full well that calling
their language "interpreted" would have affected public perceptions.

It's interesting to see how culture affects things. You talked of 'IT
people' in your post and hold up Java of an example of how byte-code
doesn't mean slow, the implication being that Python uses the same
mechanisms as Java and therefore is good enough. In the general IT
world, Java is quite popular (to make a bit of an understatement) and
it would often be used as some sort of benchmark.

On the other hand, the backgrounds I have familiarity with are computer
game development and embedded development. In these areas, we would
point to Java as evidence that 'interpreted' bytecode is too slow and
that anything using a similar technology is likely to be a problem.

I'm not saying you're wrong, just highlighting that comparisons
themselves always sit in some wider context which can make the
comparison unimportant.

I think it's also important to note that 'interpreted' doesn't
necessarily mean 'parsed repeatedly'. Many older machines which came
with BASIC installed would store their statements in a tokenised form -
arguably bytecode with a large instruction set, if you look at it a
certain way. This isn't necessarily so far from what Python does, yet
few people would argue that those old forms of BASIC weren't
interpreted.

-- 
Ben Sizer



From jeremy+complangpython at jeremysanders.net  Thu Feb 16 03:16:18 2006
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Thu, 16 Feb 2006 08:16:18 +0000
Subject: Poisson Distribution (for a newbie)
References: <1140041825.586531.287400@z14g2000cwz.googlegroups.com>
Message-ID: <dt1cci$rb6$1@gemini.csx.cam.ac.uk>

diffuser78 at gmail.com wrote:

> I want to mimic such kind of distribution using poison traffic ( a bell
> shaped curve). I looked into wikipedia and some other tutorials but I
> wasn't sure how many parameter does the above kind of distribution
> would require.

I've used numarray's poisson distribution generator, which was very useful.
There may well be something similar in NumPy/Numeric/SciPy.

e.g.

from numarray.random_array import poisson

for i in xrange(100):
 print poisson(10)

Where 10 is the mean.

Jeremy

-- 
Jeremy Sanders
http://www.jeremysanders.net/


From tjreedy at udel.edu  Fri Feb 17 22:15:36 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 17 Feb 2006 22:15:36 -0500
Subject: Python 3000 deat !? Is true division ever coming ?
References: <1139810036.943598.229030@g47g2000cwa.googlegroups.com><dt4pj8$o21$1@wake.carmen.se>
	<1140213665.105188.103450@o13g2000cwo.googlegroups.com>
Message-ID: <dt63gl$hcn$1@sea.gmane.org>


<seb.haase at gmail.com> wrote in message 
news:1140213665.105188.103450 at o13g2000cwo.googlegroups.com...
>> not actively encouraged. The tutorial, which is maintained
>> and updated, still describes old style classes, and the
>> old division behaviour.

Perhaps the tutorials needs updating.

> My main point was/is:  why is there not more discussion about "true
> division" !!?

It was discussed to death a few years ago with probably 100s of posts.

> As you pointed out: the "true division" part of "Python3000" might be
> one of the "scariest" and should therefore be pointed out already in
> the tutorial !!  (It would look quite ugly to newcomers, though)

The tutorial should say to use // for int (floor) division.  There is 
nothing scary about / or the future change of int/int if you only use / for 
float division.

> Having said that:  I would vote against EVER introducing true division
> as default - because it will just PISS too many (long time python)
> people OFF. ;-)

The decision was made years ago.  The rationale is summarized in
 http://www.python.org/peps/pep-0238.html

In a sense, Python 3.0 is actively under development.  New features have, 
are, and will be added to 2.X as they are developed.  Currently envisioned 
changes and deletions are listed in
http://www.python.org/peps/pep-3000.html

I believe Guido's new job at Google gives him more time to work on Python 
development than previously.  So I think we will see 3.0 sooner than might 
have been envisioned just a few months ago.

Terry J. Reedy





From steve at REMOVETHIScyber.com.au  Fri Feb 17 04:54:23 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 17 Feb 2006 20:54:23 +1100
Subject: Python 3000 deat !? Is true division ever coming ?
References: <1139810036.943598.229030@g47g2000cwa.googlegroups.com>
	<1139928242.726349.221080@g44g2000cwa.googlegroups.com>
	<1140152142.080462.99000@g14g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.17.09.54.23.838590@REMOVETHIScyber.com.au>

On Thu, 16 Feb 2006 20:55:42 -0800, seb.haase wrote:

> I don't think "Because this change might break code, it's being
> introduced very gradually. Python 2.2 begins the transition, but the
> switch won't be complete until Python 3.0."   says enough.

I'm not sure what else should be said.

> Should I start using
> "from __future__ import division" in my modules ?

I don't know. Do you use integer or floating point division? Do you like
writing float(x)/y instead of just x/y?

> I fear that it might make my code "unreadable" (people would not expect
> this when reading somewhere in the middle of the module !!!)

Anybody using Python *should* be aware of the division issue. As soon as
they see a division, it is their responsibility to *find out what it
means*. That doesn't require much work: they can scroll up to the
beginning of the module and look at the first few lines. That's not hard.

Anybody person who is unwilling to scroll to the start of the module or
use their text editor to search for "from __future__ import division"
shouldn't be programming.

I'll allow for the occasional newbie who somehow has missed out on
learning about true division, but that's no reason to not implement
features in the language. The cost of confusing a newbie once in a month
of Sundays is far less than the benefit of introducing true division.


-- 
Steven.



From grante at visi.com  Mon Feb 13 10:19:12 2006
From: grante at visi.com (Grant Edwards)
Date: Mon, 13 Feb 2006 15:19:12 -0000
Subject: how do you pronounce 'tuple'?
References: <vuednQcT5sUEn23eRVn-iA@rcn.net> <eiUHf.7378$bd4.6826@edtnps84>
	<yd1If.1599$No6.38148@news.tufts.edu>
Message-ID: <11v18rggmsa317d@corp.supernews.com>

On 2006-02-13, John Salerno <johnjsal at NOSPAMgmail.com> wrote:
> Markus Wankus wrote:
>
>> I'm not sure, but I think it is pronounced "m?nage ? trois".
>
> LOL. You guys are hilarious. I think I made the right decision
> to start learning Python!  :)

Of course! What did you expect from devotees of a language
named after one of the greatest comedy shows in TV history?

-- 
Grant Edwards                   grante             Yow!  Edwin Meese made me
                                  at               wear CORDOVANS!!
                               visi.com            


From keith.b.perry at gmail.com  Tue Feb 21 09:40:18 2006
From: keith.b.perry at gmail.com (kbperry)
Date: 21 Feb 2006 06:40:18 -0800
Subject: Zope/Plone - Is it the right solution?
Message-ID: <1140532818.195281.316580@g44g2000cwa.googlegroups.com>

Hi everyone,
I am currently a student, and for our HCI class project we are
redeveloping our CS website.  I attend a very large university (around
30,000 students), and the CS site will need to be updated by many
people that don't have technical skills (like clerical staff).

The biggest problem with the current site is that not enough people
have access to update it.  Since I love python, these seemed like
viable solutions.

1)  Is Zope/Plone overkill for this type of project?

2)  Why use Plone vs. straight up Zope?

3)  Is there a way to get over the steep learning curves (that I have
read about)?



From nephish at xit.net  Tue Feb  7 10:34:36 2006
From: nephish at xit.net (nephish at xit.net)
Date: 7 Feb 2006 07:34:36 -0800
Subject: in over my head ascii
In-Reply-To: <1139319079.318524.158460@f14g2000cwb.googlegroups.com>
References: <1139245216.350356.272170@z14g2000cwz.googlegroups.com>
	<sk4fu1ljvt7h7d6euj7nq06e1e0ml8p8u5@4ax.com>
	<1139251420.501345.91850@g44g2000cwa.googlegroups.com>
	<1139256817.218319.160370@f14g2000cwb.googlegroups.com>
	<1139259694.603482.293660@g14g2000cwa.googlegroups.com>
	<1139260158.822523.308780@g47g2000cwa.googlegroups.com>
	<1139273414.645101.237780@z14g2000cwz.googlegroups.com>
	<1139289681.648488.7060@g43g2000cwa.googlegroups.com>
	<36mgu1dj9rqh3t8htppm41otgrgf70ob1t@4ax.com>
	<1139319079.318524.158460@f14g2000cwb.googlegroups.com>
Message-ID: <1139326476.406060.63660@g43g2000cwa.googlegroups.com>

ok, i am stuck again.

from the docs, the byte stream is supposed to look like this:

'S' 'T' 'X'   [length indicator] [message type] [message] 'E' 'N' 'X'

the length indicator it says is a four byte integer number of a value N
 ( N would be how long the message body is )

the message type comes from a table in the docs. In my case, the
message type is 200. This is also supposed to be sent as  a 4 byte
value.

so..... how do i make 200 occupy 4 bytes ?



From cdc at maxnet.co.nz  Mon Feb 13 21:35:25 2006
From: cdc at maxnet.co.nz (Carl Cerecke)
Date: Tue, 14 Feb 2006 15:35:25 +1300
Subject: invert the order of a string
In-Reply-To: <1139884304.721510.106640@g14g2000cwa.googlegroups.com>
References: <dsr600$9sj$1@solaris.cc.vt.edu>
	<6272v111vee95606gd7fucjdqmec8uhc7e@4ax.com>
	<dsr6n3$amh$1@solaris.cc.vt.edu>
	<aq72v1l60fo3rv1r8oq9np7nc7i5ikueer@4ax.com>
	<dsr7q6$cnv$1@solaris.cc.vt.edu>
	<7x7j7yixit.fsf@ruckus.brouhaha.com>
	<1139884304.721510.106640@g14g2000cwa.googlegroups.com>
Message-ID: <43f141ed$1@usenet01.boi.hp.com>

Eric McGraw wrote:
>>Well, it turns out to be the best way to invert a string, IMO. The
>>reversed() feature returns a reversed object... not a reversed string.
>>In short, I have to fool with it again _after_ it has been inverted. The
>>slicing takes care of the job right away and gives me what I want... no
>>Computer Sciencey <reversed object at 0xb6f6152c>> to deal with :)
> 
> 
> A <reversed object> can be turned back into a string:
>  >>> st = '0123456789'
>  >>> reversed(st)
>  <reversed object at 0x00A8CC50>
>  >>> ''.join( reversed(st) )
>  '9876543210'

But that's slower than new_s = s[::-1]

Cheers,
Carl.


From scott.daniels at acm.org  Fri Feb 10 14:18:23 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Fri, 10 Feb 2006 11:18:23 -0800
Subject: ordered sets operations on lists..
In-Reply-To: <mailman.1722.1139590689.27775.python-list@python.org>
References: <mailman.1722.1139590689.27775.python-list@python.org>
Message-ID: <43ece5bb$1@nntp0.pdx.net>

Amit Khemka wrote:
> Hello, Is there a *direct* way of doing set operations on lists which
> preserve the order of the input lists ?
Nope

> For Ex.  l1 = [1, 5, 3, 2, 4, 7]
>             l2 =  [3, 5,  10]
> 
> and (l1 intersect l2)  returns [5, 3]     .... (and (l2 intersect l1) 
> returns [3, 5])

However:
     intersection = set(list1) & set(list2)
     [element for element in list1 if element in intersection]
or
     [element for element in list2 if element in intersection]
Give you the result you'd like.

--Scott David Daniels
scott.daniels at acm.org


From finite.automaton at gmail.com  Thu Feb 16 16:21:30 2006
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 16 Feb 2006 13:21:30 -0800
Subject: Merging two lists of data (Pythonic way)
References: <8k5Jf.27896$sA3.57@fed1read02>
	<1140122391.823206.74580@g14g2000cwa.googlegroups.com>
	<AK5Jf.27901$sA3.22003@fed1read02>
Message-ID: <1140124890.906664.155570@f14g2000cwb.googlegroups.com>

You might consider writing two classes to represent the values in list1
and list2.  It might be more Pythonic than sloshing around all of those
lists and dictionaries.

But as it is, it looks like you want to find matching pairs of lists
and dictionaries from list1 and list2, respectively:

# index dictionaries from LIST2 by 'code' element.
# (assumption: no two dicts have the same "code" value)
lookup_table = dict( [(d['code'], d) for list in LIST2] )

# iterate over LIST1, matching list1 elements with corresponding list2
elements
pairs = [( L, lookup_table[L[0]]) for L in LIST1 if L[0] in
lookup_table]

# make whatever kind of modifications you want
for list_item, dictionary_item in pairs:
    dictionary_item['VERIFIED'] = list_item[2]  # or something




And- If you're using Python 2.4, you can get more efficient memory
usage out of this by using generator expressions instead of list
comprehensions.



From reply.in.the.newsgroup at my.address.is.invalid  Fri Feb 17 15:22:14 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Fri, 17 Feb 2006 21:22:14 +0100
Subject: Databases and python
References: <pan.2006.02.14.08.06.18.754312@dcs.nac.uci.edu>
	<gtf8v1dmu147otntn4ghm9biavq01feuhr@4ax.com>
	<pan.2006.02.17.03.22.11.928784@dcs.nac.uci.edu>
	<dscbv1tagf9mrfqkfc49bifjdc0cp05bhl@4ax.com>
	<pan.2006.02.17.18.47.41.873008@dcs.nac.uci.edu>
Message-ID: <35bcv150tjc2ost4cnb262q2vse6okcg0e@4ax.com>

Dan Stromberg:
>Rene Pijlman:
>> Right. My second attempt would be: a BTree with the word as key, and a
>> BTree of filenames as value

>Would ZODB let me do that?

Yes.

>I'm puzzled, because:
>>>> d1={}
>>>> d={}
>>>> d[d1] = ''
>TypeError: dict objects are unhashable

This is using a dict as _key_, whereas I suggested to use a BTree as
_value_.

>I don't know how to do a btree of btrees in python...

Read this first:
http://www.zope.org/Wikis/ZODB/guide/node6.html#SECTION000630000000000000000

On second thought, a BTree of TreeSet's may be a better idea.

The key of your outer BTree is a word. It's value is a TreeSet. The key of
that TreeSet is a filename. It has no values.

This provides you with a persistent scalable mapping:

    word -> set of filenames

I estimate it takes 2 hours to learn ZODB, and 20 minutes to program a
benchmark. The hours are reusable :-)

-- 
Ren? Pijlman


From ian at excess.org  Wed Feb  8 14:05:25 2006
From: ian at excess.org (Ian Ward)
Date: Wed, 08 Feb 2006 14:05:25 -0500
Subject: Problem with curses and UTF-8
In-Reply-To: <11ujl0hof3fql62@corp.supernews.com>
References: <mailman.1566.1139345769.27775.python-list@python.org>
	<43E9234B.6030108@v.loewis.de> <11ujl0hof3fql62@corp.supernews.com>
Message-ID: <43EA40F5.6050604@excess.org>

Thomas Dickey wrote:
> "Martin v. L?wis" <martin at v.loewis.de> wrote:
>>The ncurses documentation suggests that you should link with
>>ncurses_w instead of linking with ncurses - you might try
>>that as well. If it helps, please do report back.
> 
> 
> ncursesw

I'll test it if someone would dumb down "link with ncursesw instead of 
ncurses" a little for me.

I tried:
./configure --with-libs="ncursesw5"

and it failed saying:
checking size of wchar_t... configure: error: cannot compute sizeof 
(wchar_t), 77

Ian Ward



From steve at holdenweb.com  Mon Feb 13 16:38:05 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Feb 2006 16:38:05 -0500
Subject: Jython socket typecasting problems
In-Reply-To: <43f0f05d$1_2@newspeer2.tds.net>
References: <1139678202.221563.308700@f14g2000cwb.googlegroups.com>	<456l92F554abU1@uni-berlin.de>	<mailman.1803.1139803276.27775.python-list@python.org>	<1139857815.855155.58400@g43g2000cwa.googlegroups.com>
	<43f0f05d$1_2@newspeer2.tds.net>
Message-ID: <dsqu7q$8fi$1@sea.gmane.org>

Kent Johnson wrote:
> Mark Fink wrote:
> 
>>I added the two print lines as recommended:
>>        self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>>        print type(self.host), repr(self.host)
>>        print type(self.port), repr(self.port)
>>        self.socket.connect((self.host, self.port))
>>        self.socketOutput = self.socket.getOutputStream()
>>
>>And more specific information:
>>D:\AUT_TEST\workspace\JyFIT\fit>jython JyFitServer2.py 127.0.0.1 1234
>>12
>>['JyFitServer2.py', '127.0.0.1', '1234', '12']
>>127.0.0.1
>>org.python.core.PyString '127.0.0.1'
>>org.python.core.PyString '1234'
>>Traceback (innermost last):
>>  File "JyFitServer2.py", line 148, in ?
>>  File "JyFitServer2.py", line 31, in run
>>  File "JyFitServer2.py", line 98, in establishConnection
>>  File "D:\AUT_TEST\Jython21\Lib\socket.py", line 135, in connect
>>TypeError: java.net.Socket(): 1st arg can't be coerced to
>>java.net.InetAddress or String
>>
>>No casting from string to string?? I learned that there is no such
>>thing as explicit typecasting. What to do?
> 
> 
> The problem is that the second arg is not an int. The second problem is 
> that the error message errorneously points to the first arg. See my 
> earlier post.
> 

OK, so presumably you've worked out that where you assign

     self.port = something

you need to use

     self.port = int(something)

That should do it - Python doesn't have implicit type conversion like 
Perl does, but there are plenty of conversion functions available. That 
error message really wasn't helpful, was it?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From adam.sven.johnson at gmail.com  Tue Feb  7 21:38:13 2006
From: adam.sven.johnson at gmail.com (adam johnson)
Date: Wed, 8 Feb 2006 15:38:13 +1300
Subject: module with __call__ defined is not callable?
Message-ID: <6ab99bf50602071838m2abd3871q@mail.gmail.com>

Hi All.
I was wondering why defining a __call__ attribute for a module doesn't make
it actually callable.

I don't have any reason for doing so, I was just wondering if it worked, and
found out it didn't.

$ cat mod.py
"""
Test callable module
"""
def __call__():
    return "in mod.__call__"


>>> import mod
>>> mod()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: 'module' object is not callable
>>> mod.__call__()
'in mod.__call__'


Thanks for any replies, Adam.
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From bencvt at gmail.com  Fri Feb 10 13:37:26 2006
From: bencvt at gmail.com (Ben Cartwright)
Date: 10 Feb 2006 10:37:26 -0800
Subject: random playing soundfiles according to rating.
In-Reply-To: <1139541262.121071.130110@g47g2000cwa.googlegroups.com>
References: <1139456949.087347.173800@o13g2000cwo.googlegroups.com>
	<1139532595.345369.241560@o13g2000cwo.googlegroups.com>
	<1139541262.121071.130110@g47g2000cwa.googlegroups.com>
Message-ID: <1139596646.900481.8430@z14g2000cwz.googlegroups.com>

kpp9c wrote:
> I've been looking at some of the suggested approaches and looked a
> little at Michael's bit which works well.... bisect is a module i
> always struggle with (hee hee)
>
> I am intrigued by Ben's solution and Ben's distilled my problem quite
> nicely

Thanks!-)  Actually, you should use Michael's solution, not mine.  It
uses the same concept, but it finds the correct subinterval in O(log n)
steps (by using bisect on a cached list of cumulative sums).  My code
takes O(n) steps -- this is a big difference when you're dealing with
thousands of items.

> but, well....i don't understand what "point" is doing with
> wieght for key, weight for zlist

This line:
    point = random.uniform(0, sum(weight for key, weight in zlist))
Is shorthand for:
    total = 0
    for key, weight in zlist:
        total += weight
    point = random.uniform(0, total)

> furthermore, it barfs in my
> interpreter... (Python 2.3)

Oops, that's because it uses generator expressions
(http://www.python.org/peps/pep-0289.html), a 2.4 feature.  Try
rewriting it longhand (see above).  The second line of the test code
will have to be changed too, i.e.:
  >>> counts = dict([(key, 0) for key, weight in data])

--Ben



From mfranklin1 at gatwick.westerngeco.slb.com  Tue Feb 21 05:17:53 2006
From: mfranklin1 at gatwick.westerngeco.slb.com (Martin Franklin)
Date: Tue, 21 Feb 2006 10:17:53 +0000
Subject: Little tool - but very big size... :-(
In-Reply-To: <43FAE5D5.5000309@gmail.com>
References: <43FAD9E3.5010004@gmail.com>
	<43FADD2F.8060601@gatwick.westerngeco.slb.com>
	<43FAE5D5.5000309@gmail.com>
Message-ID: <43FAE8D1.9020208@gatwick.westerngeco.slb.com>

Durumdara wrote:
> Dear Martin !
> 
> Thanx for it:
> 
> setup(
>     options = {"py2exe": {"bundle_files": 1,   # <================ this 
> help me !!!!!!!!!!!!
>                           "compressed": 1,
>                           "optimize": 2}},
>     # The lib directory contains everything except the executables and 
> the python dll.
>     # Can include a subdirectory name.
>     windows = [wxPyHDDirList],
>     )
> 
> Can I increase level of the optimization ?
> Can I increase level of the zip packing ?

Sorry, I have not used py2exe for some time, you would be better to ask 
this question on the py2exe list:

https://lists.sourceforge.net/lists/listinfo/py2exe-users

or read their documentation

http://www.py2exe.org/ or Wiki 
http://starship.python.net/crew/theller/moin.cgi/Py2Exe


in particular...

http://starship.python.net/crew/theller/moin.cgi/BetterCompression


HTH


> 
> Please help me: dd
> 
> 
> Martin Franklin wrote:
> 
>> Durumdara wrote:
>>  
>>
>>> Hi !
>>>
>>> I have a problem.
>>> I have a little tool that can get data about filesystems and wrote it in
>>> python.
>>>
>>> The main user asked me a GUI for this software.
>>>
>>> This user is needed a portable program, so I create this kind of the
>>> software with Py2Exe.
>>>
>>> But it have very big size: 11 MB... :-(
>>>
>>> I need to have more compressed result. Can I compress dll-s, pyd-s with
>>> Py2Exe ?
>>> Can I decrease the total size with something ?
>>>    
>>>
>>
>>
>> you could try UPX http://upx.sourceforge.net/ I think it will handle
>> the .pyd and dll files (it did the last time I tested it)
>>
>>
>>  
>>
>>> If not, how to I create an self-unpackager and self-starter program that
>>> use an temporary directory in the disk ? With WinRar ?
>>>    
>>>
>> I may be wrong (havn't used py2exe in a while) but I think it can now
>> (again) create a single exe file?  Otherwise something like Inno Setup
>> http://www.jrsoftware.org/isinfo.php or a simple self extracting zip
>> file
>>
>>
>>
>>  
>>
>>> Thanx for help:
>>> dd
>>>
>>>
>>>
>>>    
>>>
>>  
>>
> 



From cdc at maxnet.co.nz  Thu Feb  9 16:36:31 2006
From: cdc at maxnet.co.nz (Carl Cerecke)
Date: Fri, 10 Feb 2006 10:36:31 +1300
Subject: CLI
In-Reply-To: <1139507308.888959.320480@f14g2000cwb.googlegroups.com>
References: <1139507308.888959.320480@f14g2000cwb.googlegroups.com>
Message-ID: <43ebb5e4@usenet01.boi.hp.com>

mwt wrote:
> I want to do programmatic terminal commands on unix with python - i.e.
> I want my program to issue commands to start and stop scripts, other
> programs, etc. I'm sure this must be fairly straightforward, but
> haven't been able to find a reference for it. Any help?
> 

Try:

pexpect.sourceforge.net

Cheers,
Carl.


From peter at engcorp.com  Fri Feb  3 21:43:42 2006
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 03 Feb 2006 21:43:42 -0500
Subject: Making Popen items terminate when program ends.
In-Reply-To: <1139011851.330605.262740@g14g2000cwa.googlegroups.com>
References: <1139011851.330605.262740@g14g2000cwa.googlegroups.com>
Message-ID: <ds14cm$t0h$1@sea.gmane.org>

Ernesto wrote:
> I used Popen to launch a seperate telnet window, like this:
> 
> subprocess.Popen("start telnet.exe -f C:\Folder\File.txt localhost
> 6000",shell=True)

I can't answer the direct question, but this is the second post of yours 
I've seen with clear danger signals: you apparently don't know yet about 
"raw" strings and escaping of special characters.  You are getting away 
with it right now because you happen to have used uppercase F characters 
in the above string, but if they had been lowercase you'd have real 
troubles.

Please see this page: http://docs.python.org/ref/strings.html and read 
about escape sequences in strings, and about raw strings.  You should 
either prefix your string with an "r" (just before the opening quotation 
mark) or escape the backslashes (as in use "C:\\Folder..." instead of 
just "C:\Folder").

-Peter



From felipe.lessa at gmail.com  Wed Feb 22 16:11:54 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Wed, 22 Feb 2006 18:11:54 -0300
Subject: Little tool - but very big size... :-(
In-Reply-To: <43FCCBBD.9090807@ghaering.de>
References: <mailman.2211.1140513270.27775.python-list@python.org>
	<quBKf.1339$A83.42251@twister1.libero.it>
	<ecCdnZ2f8MjdXmHenZ2dnUVZ_tSdnZ2d@is.co.za>
	<43FCCBBD.9090807@ghaering.de>
Message-ID: <1140642715.4173.0.camel@kenshin>

Em Qua, 2006-02-22 ?s 21:38 +0100, Gerhard H?ring escreveu:
> A Tkinter hello weights here 1,95 MB (2.049.264 Bytes)
> 
> compared to the small wxPython tool that I compressed recently: 2,80 MB 
> (2.942.543 Bytes)

What about PyGtk? Does anybody have any figures? I can't test here =(...

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From greg.kujawa at gmail.com  Fri Feb 24 14:34:30 2006
From: greg.kujawa at gmail.com (gregarican)
Date: 24 Feb 2006 11:34:30 -0800
Subject: PyQt - multiple window instances?
References: <1140808598.748272.240790@i39g2000cwa.googlegroups.com>
	<4694jqFa1ahgU1@uni-berlin.de>
Message-ID: <1140809670.338611.258120@i40g2000cwc.googlegroups.com>

The window isn't being created as a new class instance or anything. The
main class is the application main window as a whole and this
particular window is just part of that class. I have typed data into
the window, then tried to open up a new window. But when I do the
window where I have typed data disappears and is replaced by a new
window that's blank. What's the easiest way to keep a reference to the
old window?



From doug.bromley at gmail.com  Mon Feb 20 10:13:33 2006
From: doug.bromley at gmail.com (Doug Bromley)
Date: Mon, 20 Feb 2006 15:13:33 +0000
Subject: Python for PHP Programmers
Message-ID: <288425520602200713s3b0bc2f7oca71b878a78f2d87@mail.gmail.com>

Hi All

Please be gentle but I'm primarily a PHP coder after a few years of academic
experience in Java I've lost my object orientated programming style and have
become a procedural PHP coder.  I started using Python almost 12mths ago now
but I'm still very much working in a PHP style.  Obviously I need to learn
the Python way and I have been doing a piece at a time, however, I was
wondering if you had any specific advice for PHP -> Python programmers?  Any
habits I need to pickup/drop?

Thanks for any input and thanks for your patience.

Doug
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From steve at holdenweb.com  Tue Feb 21 14:51:30 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 21 Feb 2006 14:51:30 -0500
Subject: message
In-Reply-To: <83A09C47AC2C18478A50F393D26B53103EADD0@exchange.siteworx.local>
References: <83A09C47AC2C18478A50F393D26B53103EADD0@exchange.siteworx.local>
Message-ID: <43FB6F42.9010805@holdenweb.com>

Nina Almaguer wrote:
> Hi,
> We are a web integration firm in Reston, VA and would like to post the 
> following developer position (I have already joined the group).
>  
>  
> 
> When you begin your career at Siteworx, you?ll be part of a rapidly 
> growing software and services company. In fact, you have probably 
> visited some of our web applications and sites already ? many are for 
> companies with household names. It?s this kind of success that creates 
> exceptional opportunities for ambitious people. If you?re looking for a 
> place where you can perform your best, consider the following position 
> in our Reston, Virginia headquarters:
> 
>  
> 
> Software Developer
> 
>  
> 
> You will develop Internet applications in teams from Siteworx 
> specifications. You will work closely with many Senior Developers to 
> improve your knowledge and technical prowess.  Siteworx has very high 
> standards and understands that very few people are qualified to do what 
> we do upon hiring, however, the position requires a BA/BS in a technical 
> field and 1+ years experience (internships applicable) in software 
> development.  Fluency with three or more of following is necessary: 
> XHTML, CSS, C/C++, Javascript, Java, Python, XSLT.  A background in 
> Object Oriented Programming is necessary and familiarity with Zope is a 
> major plus.
> 
Nina:

See http://www.python.org/Jobs-howto.html

for how to get this on the python.org web site.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From igouy at yahoo.com  Wed Feb 22 19:10:43 2006
From: igouy at yahoo.com (igouy at yahoo.com)
Date: 22 Feb 2006 16:10:43 -0800
Subject: Python vs. Lisp -- please explain
In-Reply-To: <donn-98EB11.09574921022006@gnus01.u.washington.edu>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com>
	<mailman.2160.1140440898.27775.python-list@python.org>
	<1140454473.335788@jetspin.drizzle.com>
	<pan.2006.02.20.21.59.12.636908@REMOVETHIScyber.com.au>
	<1140490302.639049@jetspin.drizzle.com>
	<mailman.2231.1140532613.27775.python-list@python.org>
	<donn-98EB11.09574921022006@gnus01.u.washington.edu>
Message-ID: <1140653442.957395.283220@z14g2000cwz.googlegroups.com>


Donn Cave wrote:
> In article <mailman.2231.1140532613.27775.python-list at python.org>,
>  "Chris Mellon" <arkanes at gmail.com> wrote:
> ...
> > They won't say Java. Ask them why Python is interpreted and Java isn't
> > and you'll have a hard time getting a decent technical answer, because
> > Python isn't all that different from Java in that regard, especially
> > pre-JIT versions of Java.
>
> For me that would be partly because I don't know that
> much about Java, honestly.  Just searching at random
> for something about the subject, I cam across this -
> http://www-128.ibm.com/developerworks/java/library/j-native.html?loc=j
> - which seems like it might be of some interest here.
>
> My impression from reading this is that Java actually
> can be compiled to native code, though in 2002 this
> was relatively new.
>
>    Donn Cave, donn at u.washington.edu


Excelsior Jet ahead-of-time (AOT) compiler FAQ
"How does it work from the technical point of view?"
http://www.excelsior-usa.com/jetfaq.html#internals



From bokr at oz.net  Tue Feb  7 13:35:46 2006
From: bokr at oz.net (Bengt Richter)
Date: Tue, 07 Feb 2006 18:35:46 GMT
Subject: a question regarding call-by-reference
References: <1139250105.744691.110440@o13g2000cwo.googlegroups.com>
Message-ID: <43e8e398.188184685@news.oz.net>

On 6 Feb 2006 10:21:45 -0800, "enjoying the view" <pparkkin at gmail.com> wrote:

>I am working on a school project, trying to build a simple RPC stub
>generator. The idea is that the generator takes a normal python file
>with functions defined in it and produces a client and server stub. The
>client stub has the same functions defined, but they just connect to
>the server and ask it to call the desired functions. The server stub is
>a server listening for incoming requests and dispatching them to the
>appropriate functions and sending back the results. Extremely simple
>and I've gotten it to mostly work, but I have one problem:
>call-by-reference parameters. An example:
>
>A function like this:
>def sum(a, b):
>  return a + b
>
>would yield a client stub like this (simplified):
>def sum(a, b):
>   send_message({'funcname': 'sum', 'args': (a, b)})
>   result = receive_message()
>   return result
>
>Now, this works just fine. I get problems when I try to do something
>like this:
>def add_elm(list):
>   list.append('elm')
>   return
>
>Imported normally this would work fine. The list given as a parameter
>would be one element larger. But when the stubs are generated, the
>function doesn't return anything and the list is appended in the server
>and the client-side list is left untouched. At first I thought the
>solution was easy, just return the changed parameters and place them in
>the parameter variables in the client stub:
>def add_elm(list):
>   send_message({'funcname': 'add_elm', 'args': (list)})
>   response = receive_message()
if the response contains an updated list, you can update the content
of the add_elm caller's list by slice assignment, e.g.,
    list[:] = response.get(<however you get the updated list>')

But you are in really tricky territory here I think. There is any number
of ways to mutate objects via function argument reference. Not just
if they're lists. And lists can be deeply nested, so you could be sending
deep copies of lists across a network, which could involve most of your memory
even if the first level has only a few elements. And if there are side effects besides
the direct mutations, you have additional problems. What if a function accesses
arg.prop and that's a property that keeps count or otherwise tracks instances of something?

The totally general solution is probably impossible. So if I were you I would go back to
the specifier of this problem and negotiate some severe restrictions on assumptions
about arguments (maybe just outlaw direct mutation and access side effects ;-)

>   (list) = response.get('args')
>   return response.get('result')
>
>The problem is, this doesn't work. The original list doesn't point to
>the changed list. I have been trying to figure this out and it seems
>that if I just assign to the list variable it just modifies the local
>(to the function) name space, and that those changes aren't reflected
>in the list in the original name space.
>
>I believe there are some ways around this, but I haven't found one that
>would not require any special handling in either the code calling the
>client stub or the original functions. I want to maintain transparency.
>
>etv
>
Good luck ;-)

Regards,
Bengt Richter


From steve at holdenweb.com  Fri Feb 24 16:15:57 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 24 Feb 2006 16:15:57 -0500
Subject: PyCon blog
Message-ID: <dtnt2c$3fb$1@sea.gmane.org>

Relaxing in the complete absence of any responsibility for the 
organization, I am for the first time trying to record impressions of 
each of the PyCon sessions I attend in my blog.

   http://holdenweb.blogspot.com/

Any reactions will be received with interest.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From fakeaddress at nowhere.org  Sat Feb 25 10:29:52 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Sat, 25 Feb 2006 15:29:52 GMT
Subject: Multiple threaded download streams?
In-Reply-To: <46b36eFa9ocnU1@uni-berlin.de>
References: <1140867665.749334.210370@v46g2000cwv.googlegroups.com>
	<1200l41lq3dgu73@corp.supernews.com> <46b36eFa9ocnU1@uni-berlin.de>
Message-ID: <QJ_Lf.37530$F_3.20616@newssvr29.news.prodigy.net>

Diez B. Roggisch wrote:
>> Use a separate thread for downloading.
> 
> Or the twisted select-reactor. No threads needed.

He's using urllib2, which does not use Twisted's select-reactor.

Fortunately urllib2 downloads run fine in their own threads; no
rewrite-all-the-code-as-Twisted-state-machines needed.


-- 
--Bryan


From steven.klass at gmail.com  Tue Feb 28 10:20:50 2006
From: steven.klass at gmail.com (rh0dium)
Date: 28 Feb 2006 07:20:50 -0800
Subject: Get my airlines boarding pass
Message-ID: <1141140050.737063.259690@p10g2000cwp.googlegroups.com>

Hi all,

Has any of you fine geniuses figured out a nice python script to go to
the Southwest airlines website and check in, and retrieve your boarding
pass - automatically 24 hours in advance



From kent at kentsjohnson.com  Mon Feb 27 08:47:01 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Mon, 27 Feb 2006 08:47:01 -0500
Subject: How to do an 'inner join' with dictionaries
In-Reply-To: <1141047580.492771.97130@z34g2000cwc.googlegroups.com>
References: <1141047580.492771.97130@z34g2000cwc.googlegroups.com>
Message-ID: <4402fe37$1_1@newspeer2.tds.net>

cyborg4 at walla.co.il wrote:
> Let's say I have two dictionaries:
> dict1 is  1:23,  2:76,  4:56
> dict2 is  23:A, 76:B,  56:C
> 
> How do I get a dictionary that is
> 1:A, 2:B, 4:C
> 
  >>> dict1 = {1:23,  2:76,  4:56}
  >>> dict2 = {23:'A', 76:'B',  56:'C'}
  >>> dict((key, dict2[value]) for key, value in dict1.iteritems())
{1: 'A', 2: 'B', 4: 'C'}

Kent


From rzantow at gmail.com  Wed Feb  8 16:59:04 2006
From: rzantow at gmail.com (Rick Zantow)
Date: Wed, 08 Feb 2006 16:59:04 -0500
Subject: Number Format function
References: <mailman.1603.1139418641.27775.python-list@python.org>
	<1139430545.465074.322060@z14g2000cwz.googlegroups.com>
	<mailman.1623.1139430803.27775.python-list@python.org>
	<1139433369.390308.170070@f14g2000cwb.googlegroups.com>
Message-ID: <Xns9764ACC5C2CC6rzed@208.49.80.253>

"wittempj at hotmail.com" <martin.witte at gmail.com> wrote in 
news:1139433369.390308.170070 at f14g2000cwb.googlegroups.com:

> def number_format(num, places=0):
>     """Format a number according to locality and given places"""
>     locale.setlocale(locale.LC_ALL, "")
>     return locale.format("%.*f", (places, num), True)
> 

There are some edge cases in the format conversion that could present 
some issues. For example:

>>> print number_format( 2312753.44500000, 2 )
2,312,753.44
>>> print number_format( 2312753.44500001, 2 )
2,312,753.45

I would expect the first to produce the same results as the second, but, 
I suppose because of one of floating point's features, it doesn't work 
that way.

-- 
rzed


From aleaxit at yahoo.com  Sun Feb 26 15:11:20 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 26 Feb 2006 12:11:20 -0800
Subject: Do I need to convert string to integer in python?
References: <1140983754.000103.104710@i40g2000cwc.googlegroups.com>
Message-ID: <1hbd8fw.3p248617vzkarN%aleaxit@yahoo.com>

<Allerdyce.John at gmail.com> wrote:

> Do I need to convert string to integer in python? or it will do it for
> me (since dynamic type)?

Nope, no such implicit conversion (thanks be!). Strings are strings and
ints and ints and never the twain shall meet, except by explicit
request;-).


> In my python script, I have this line:
>     x /= 10;
> 
> when i run it, I get this error:
> TypeError: unsupported operand type(s) for /=: 'unicode' and 'int'
> 
> I want to divide x by 10 and assign that value back to x.

If you want x to remain a Unicode string when you're done,

x = unicode(int(x) / 10)

should work.  If you want x to become an integer, omit the unicode call
around the int(x)/10 expression.


Alex


From Bizarro.M at gmail.com  Fri Feb 10 05:41:42 2006
From: Bizarro.M at gmail.com (Bizarro-02)
Date: 10 Feb 2006 02:41:42 -0800
Subject: Parsing XML scheme (xsd) to python objects
In-Reply-To: <43EC3287.6000007@plope.com>
References: <1139492208.509376.315050@z14g2000cwz.googlegroups.com>
	<43EC3287.6000007@plope.com>
Message-ID: <1139568102.456570.281840@g44g2000cwa.googlegroups.com>

Yes, documents should also be validated against the schema. I finally
managed to compile my schema with generateDS.py but I haven't tested
the result because of my poor knowledge of Python. So I have to wait
until the group does which wanted to use my schema.
Thanks for your answer!

Matthias



From nszabolcs at gmail.com  Wed Feb  1 12:40:08 2006
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 1 Feb 2006 09:40:08 -0800
Subject: unicodedata.name
In-Reply-To: <mailman.1325.1138813699.27775.python-list@python.org>
References: <1138812201.763863.243720@o13g2000cwo.googlegroups.com>
	<mailman.1325.1138813699.27775.python-list@python.org>
Message-ID: <1138815608.283789.272240@g49g2000cwa.googlegroups.com>

thank you
(it's so obvious i don't know how i could misunderstand)



From rridge at csclub.uwaterloo.ca  Wed Feb  8 14:30:44 2006
From: rridge at csclub.uwaterloo.ca (Ross Ridge)
Date: 8 Feb 2006 11:30:44 -0800
Subject: Python 2.4.2 using msvcrt71.dll on Win and compatibility issues
References: <dsaqcf$jb5$1@online.de><43E8F864.6050605@v.loewis.de>
Message-ID: <1139427044.138581.72750@f14g2000cwb.googlegroups.com>


Martin v. L?wis wrote:
> In general, the only Microsoft-supported strategy is that you
> must use only a single msvcrt in the entire application. So
> either recompile PostGres, or recompile Python.

If you want a compiled version of Python that already uses
MSVCRT then you try using pyMingGW:

    http://jove.prohosting.com/iwave/ipython/pyMinGW.html



From bignose+hates-spam at benfinney.id.au  Tue Feb 28 20:26:19 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 01 Mar 2006 12:26:19 +1100
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<Q-Gdnf5k7bro75nZRVn-jA@comcast.com>
Message-ID: <87veuz2bwk.fsf@rose.polar.local>

Steven Bethard <steven.bethard at gmail.com> writes:

> Ben Finney wrote:
>> This PEP specifies an enumeration data type for Python.
>> An enumeration is an exclusive set of symbolic names bound to
>> arbitrary unique values.  Values within an enumeration can be iterated
>> and compared, but the values have no inherent relationship to values
>> outside the enumeration.
>
> -1 on the proposal as-is.  I don't have many use cases for
> enumerations, and I don't think they merit appearing in the builtins.
> If you put them in the collections module instead, I'd probably be +0.

This seems to be a common distinction.

Should I amend the PEP to propose "either in the builtins or in the
collections module"? Or should I propose two PEPs and let them
compete?

>> This allows the operation to succeed, evaluating to a boolean value::
>>     >>> gym_night = Weekdays.wed
>>     >>> gym_night < Weekdays.mon
>>     False
>>     >>> gym_night < Weekdays.wed
>>     False
>>     >>> gym_night < Weekdays.fri
>>     True
>>     >>> gym_night < 23
>>     False
>>     >>> gym_night > 23
>>     True
>>     >>> gym_night > "wed"
>>     True
>>     >>> gym_night > Grades.B
>>     True
>
> For the few cases of enumerations that I've needed, I've never
> wanted them to be comparable with <, >, etc.  If there were two
> classes, say ``collections.Enum`` and ``collections.OrderedEnum``
> where only the latter made the enumerated items comparable, you
> might even get me as high as +0.5.  (I only care about the
> non-comparable one, but I understand that others may have a need for
> the comparable one.)

Replies to your post indicate this is another popular distinction.

But the terminology is broken. The term "enumerated" seems to me to
imply that it does have an order. Can you suggest a term other than
"enumerated" for what you're describing with the unordered property?

-- 
 \     "For every complex problem, there is a solution that is simple, |
  `\                            neat, and wrong."  -- Henry L. Mencken |
_o__)                                                                  |
Ben Finney


From deets at nospam.web.de  Mon Feb 27 12:55:57 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 27 Feb 2006 18:55:57 +0100
Subject: ''.join() with encoded strings
References: <1141061067.253803.267540@i39g2000cwa.googlegroups.com>
Message-ID: <46gspoFasnt9U1@uni-berlin.de>

Sandra-24 wrote:

> I'd love to know why calling ''.join() on a list of encoded strings
> automatically results in converting to the default encoding. First of
> all, it's undocumented, so If I didn't have non-ascii characters in my
> utf-8 data, I'd never have known until one day I did, and then the code
> would break. Secondly you can't override (for valid reasons) the
> default encoding, so that's not a way around it. So ''.join becomes
> pretty useless when dealing with the real (non-ascii) world.
> 
> I won't miss the str class when it finally goes (in v3?).
> 
> How can I join my encoded strings effeciently?

By not mixing unicode objects with ordinary byte strings. Use

u''.join(some_unicode_objects)

to get a joined unicode object.

Diez


From johnjsal at NOSPAMgmail.com  Mon Feb 13 12:05:21 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 13 Feb 2006 17:05:21 GMT
Subject: how do you pronounce 'tuple'?
In-Reply-To: <11v1ds9gtrph7ab@corp.supernews.com>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net> <eiUHf.7378$bd4.6826@edtnps84>
	<yd1If.1599$No6.38148@news.tufts.edu>
	<11v18rggmsa317d@corp.supernews.com>
	<1Z1If.1601$No6.38091@news.tufts.edu>
	<11v1ds9gtrph7ab@corp.supernews.com>
Message-ID: <l%2If.1603$No6.38171@news.tufts.edu>

Grant Edwards wrote:
> On 2006-02-13, John Salerno <johnjsal at NOSPAMgmail.com> wrote:
>> Grant Edwards wrote:
>>> On 2006-02-13, John Salerno <johnjsal at NOSPAMgmail.com> wrote:
>>>> Markus Wankus wrote:
>>>>
>>>>> I'm not sure, but I think it is pronounced "m?nage ? trois".
>>>> LOL. You guys are hilarious. I think I made the right decision
>>>> to start learning Python!  :)
>>> Of course! What did you expect from devotees of a language
>>> named after one of the greatest comedy shows in TV history?
>> Well, I hope this doesn't make me lose credibility, but I've
>> actually never seen the show! I saw Holy Grail several years
>> ago, though. But I'm very curious about this whole cheese shop
>> skit, so when I get home tonight I'm going to download it. :)
> 
> IMO, it's not as good as the dead-parrot skit, but it's still a
> classic.
> 

Ah, now that one I have seen, and it is great! There's an episode of SNL 
where they sort of randomly show that skit, which is a little bizarre in 
itself.  :)


From deets at nospam.web.de  Sun Feb 26 16:29:34 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 26 Feb 2006 22:29:34 +0100
Subject: UnboundLocalError: local variable 'colorIndex' referenced
In-Reply-To: <1140987642.195734.187540@t39g2000cwt.googlegroups.com>
References: <1140987642.195734.187540@t39g2000cwt.googlegroups.com>
Message-ID: <46ektvFaduegU1@uni-berlin.de>

silverburgh.meryl at gmail.com schrieb:
> Can you please tell me what is the meaning this error in general?
> 
>  UnboundLocalError: local variable 'colorIndex' referenced before
> assignment
> 
> In my python script,
> I have a variable define and init to 0, like this
> colorIndex  = 0
> 
> and in one of my functions,  I increment it by 1
> def myFunc 
>    colorIndex += 1

It is alwasy a better idea to post whole scripts/working examples (even if working actaully means non-working). And this 
is an example why: Using your old code, things worked. But inside a function, colorIndex isn't in the scope. You could 
e.g. use a global-statement like this:


colorIndex = 0

def foo():
     global colorIndex
     colorIndex += 1

foo()


But that is not a very bright idea usually, as globals are difficult to debug.

Diez



From ruby at no.spam  Sun Feb 26 18:57:23 2006
From: ruby at no.spam (Michal Kwiatkowski)
Date: Mon, 27 Feb 2006 00:57:23 +0100
Subject: Local variables initialization
Message-ID: <dttf62$qng$1@news.onet.pl>

Hi!

I'm building a class that most of methods have similar intro, something
like this:

def method(self):
    var_one = self.attr_one
    var_two = self.attr_two.another_attr

    empty_list = []

    # significant code goes here
    # ...

It's done for clarity reasons, aliasing most used variables to shorted
names and initializing some other common variables. I'm wondering if I
can generalize it in any way. So far I couldn't come up with any
solution. It smells like macros (which won't be implemented in Python, I
know, I know ;), but maybe there is a way? I would like to code it that way:

@init_local_variables
def method(self):
    # significant code goes here
    # ...

If only such a decorator exists...

Thanks for any hints.

mk
-- 
 . o .       >>  http://joker.linuxstuff.pl  <<
 . . o   It's easier to get forgiveness for being wrong
 o o o   than forgiveness for being right.


From cito at online.de  Tue Feb  7 13:54:07 2006
From: cito at online.de (Christoph Zwerschke)
Date: Tue, 07 Feb 2006 19:54:07 +0100
Subject: Python 2.4.2 using msvcrt71.dll on Win and compatibility issues
Message-ID: <dsaqcf$jb5$1@online.de>

The latest Windows distribution of Python 2.4.2 is using the 
msvcrt71.dll, while PostgreSQL is using msvcrt.dll.

This lead to the following problem:

I was using PyGreSQL to connect to the PostgreSQL database. There is a 
function that prints a query object q simply by writing: "print q". What 
happens on the lower levels is that PyObject_Print(q, stdout) is called, 
where stdout is the stdout file descriptor of msvcrt71.dll. Then, 
PyGreSQL calls the PostgreSQL function PQprint, handing it over that 
stdout file descriptor. PQprint in turn calls fprintf of msvcrt.dll, 
with the same file descriptor of msvcrt71.dll. This leads to a Windows 
exception since the file descriptors of mscvrt.dll and msvcrt71.dll are 
obviously not compatible.

I can imagine that other C extensions which are using dlls based on 
msvcrt can run into the same problem.

Is there a general strategy to avoid this kind of problems?

-- Christoph


From dcrespo at gmail.com  Mon Feb 20 09:03:04 2006
From: dcrespo at gmail.com (Daniel Crespo)
Date: 20 Feb 2006 06:03:04 -0800
Subject: Print a PDF transparently
In-Reply-To: <1140223510.666168.183030@z14g2000cwz.googlegroups.com>
References: <1140184955.674138.275010@o13g2000cwo.googlegroups.com>
	<11vbpu58sll1b4f@corp.supernews.com>
	<1140190758.951694.231890@f14g2000cwb.googlegroups.com>
	<fk0cv159vg81i62524nvpuueg8q7iorcnk@4ax.com>
	<1140202841.650774.32920@z14g2000cwz.googlegroups.com>
	<1140223510.666168.183030@z14g2000cwz.googlegroups.com>
Message-ID: <1140441655.077989.221240@f14g2000cwb.googlegroups.com>

> Have you seen this?
>     http://tgolden.sc.sabren.com/python/win32_how_do_i/print.html
> In particular, the section on using win32print directly.

Yes, I have. The problems is that an external program is launched for
handling the file and print it. In the case of PDF, acrobat is
launched. In the case of PS, Ghostview is launched. When printing a
PDF, acrobat keeps alive, so the user has to close it manually. On the
other hand, Ghostview is opened, prints the file and closes
automatically. The last one is which I find the best for me, until now,
(because the Ghostview closes automatically). If I decide to go this
way, my problem then is to transform a pdf to ps, or generate a ps
directly.

For further information on what I want, please, refer to my first two
posts in this topic.

Any other help?

Thank you very much



From edreamleo at charter.net  Fri Feb 10 09:06:44 2006
From: edreamleo at charter.net (Edward K. Ream)
Date: Fri, 10 Feb 2006 08:06:44 -0600
Subject: How to invoke a tkinter menu *itself*
Message-ID: <W51Hf.36$Y42.9@fe07.lga>

Hi,



I've spent a pleasant hour or so trying to bring up a top-level Tk menu at 
the same spot as it would appear if I had actually clicked the menu.  That 
is, I want to bring up a menu from the keyboard.



The problem is computing the x and y args to menu.post.  menu.winfo_x and 
menu.winfo_rootx are always 0, presumably be cause the menu isn't packed.



And I haven't been able to use menu.invoke(??) to invoke the menu *itself*. 
One would think this would be a basic Tk functionality.



Any ideas?  Thanks.



Edward



P.S. Here is my best so far. (It must be run from Leo for the Leo magic to 
work.)



import tkFont

name = 'File' # The menu to be invoked.

# A list of all of Leo's menus.

menus = ('File','Edit','Outline','Plugins','Cmds','Window','Help')



# Compute the *approximate* x offsets of each menu.

offsets = {} ; n = 0

for z in menus:

    menu = c.frame.menu.getMenu(z)

    fontName = menu.cget('font')

    font = tkFont.Font(font=fontName)

    offsets[z] = n

    # A total hack: sorta works on windows.

    n += font.measure(z+' '*4)+1



top = c.frame.top # Leo magic.

topx,topy = top.winfo_rootx(),top.winfo_rooty()

menu = c.frame.menu.getMenu(name) # Leo magic.

menu.post(topx+offsets.get(name,0),topy)



EKR
--------------------------------------------------------------------
Edward K. Ream   email:  edreamleo at charter.net
Leo: http://webpages.charter.net/edreamleo/front.html
--------------------------------------------------------------------





From carsten at uniqsys.com  Wed Feb 15 14:17:25 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 15 Feb 2006 14:17:25 -0500
Subject: %SystemDrive%
In-Reply-To: <43F37BDE.9020505@activestate.com>
References: <dsvt14$rev$1@solaris.cc.vt.edu> <43F37BDE.9020505@activestate.com>
Message-ID: <1140031045.22048.86.camel@dot.uniqsys.com>

On Wed, 2006-02-15 at 14:07, Todd Whiteman wrote:
> Another hack:
> drive = os.popen("echo %SYSTEMDRIVE%").readline().strip()
> 
> rtilley wrote:
> > Is there a proper way to get this variable from Windows? I know it's in 
> > the registry, but I'd rather not go there. I could not find a CSIDL 
> > shell constant for it either. I've been doing this:
> >
> > os.chdir('/')
> > sys_drive = os.getcwd()
> > print sys_drive
> > C:\
> >
> > This seems too much of a hack and maybe not 100% right all of the time. 
> > How could it be done better?
> >   

Is there a reason why os.environ['SYSTEMDRIVE'] shouldn't work?

Hope this helps,

Carsten.




From python-url at phaseit.net  Mon Feb 13 10:25:45 2006
From: python-url at phaseit.net (Cameron Laird)
Date: Mon, 13 Feb 2006 15:25:45 +0000
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Feb 13)
Message-ID: <mailman.1838.1139848596.27775.python-announce-list@python.org>

QOTW:  "Dangit!  I need to find a less honest programming language.  Anyone
have a Perl cookbook handy? ..." - Lonnie Princehouse

"The pursuit of orthogonality, while admirable, can lead to insanity if
pushed too far." - Steve Holden


    One of this week's half-dozen examples of the, "Is there a better
    way ...?  We've now improved it by a factor of 300", pattern has
    to do with combinatorics--specifically, the combinations of n
    items from a list of m:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/1f7e62e5ab0edb90/
        
    Is it possible to test a string for non-ASCII characters?  No,
    it's more than possible; viewed in the correct perspective, it's
    *easy*, and merely an application of Python's more general
    encoding capabilities:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/9011319757576f45/
        
    The next PyPy sprint will immediately follow PyCon 2006:
        http://us.pycon.org/TX2006/Sprinting

    JavaScript practitioners will find Python eases their transition
    to the server- and native-sides:
        http://htmatters.net/htm/1/2006/02/Why-Python-makes-sense-for-web-development.cfm

    Paul McGuire reports satisfaction on his first use of an HTML-oriented
    extension to unittest:
        http://groups.google.com/group/comp.lang.python/browse_thread/thread/369e0f8c7e4efef/

    Pyvm is (yet) another Python implementation, one based on an independent
    virtual machine.  It has now its own Wiki:
        http://pyvm.pbwiki.com/


========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily  
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html 
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Steve Bethard, Tim Lesher, and Tony Meyer continue the marvelous
    tradition early borne by Andrew Kuchling, Michael Hudson and Brett
    Cannon of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/   

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance. 
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch
       
    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
        http://python.sourceforge.net/peps/pep-0042.html
     
    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".


-- The Python-URL! Team--

Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and
sponsor the "Python-URL!" project.


From gandalf at designaproduct.biz  Tue Feb 28 13:23:52 2006
From: gandalf at designaproduct.biz (Laszlo Zsolt Nagy)
Date: Tue, 28 Feb 2006 19:23:52 +0100
Subject: Numerical solver
Message-ID: <44049538.6040109@designaproduct.biz>


  Hello,

I would like to use a numerical solver for a specific problem. My 
problem looks like this:

   1. I have numeric constants, named A,B,C etc.
   2. I have numeric variables, named x,y,z etc.
   3. I have functions, like f1(x), f2(x), f3(x,y), f4(y) etc.
   4. I have constraints like f1(x) < A  f3(x,y) < B etc.

Fortunately, all of the variables can be limited to a closed finite 
interval. (E.g.   0 <= x <= 100)
There is a specific function, called P(x,y,z) that needs to be optimized 
(need to find its maximum/minimum).

I'm looking for a native Python solution: I would like to define the 
functions and the constraints in Python.
I have looked at the cheeseshop and found LogiLab's constraint:

http://www.logilab.org/projects/constraint/documentation

It is almost perfect for me, but it is working with finite sets.
I'm not sure about SciPy or NumPy. Do you have an idea about what is the 
package I need?
I'll gladly read any documentation or tutorial, just I do not know which 
one is the best to start with.

Thanks,

   Laszlo



From sbaush at gmail.com  Thu Feb  2 09:23:16 2006
From: sbaush at gmail.com (Sbaush)
Date: Thu, 2 Feb 2006 15:23:16 +0100
Subject: Problem in threading
Message-ID: <fc5d4c490602020623j1d26d4c5x@mail.gmail.com>

Hi all.
I've a problem with thread in python.
My applications has a GUI that has some button.
I've a MVC-like architecture.
If i click on a button there is this effect:

view.button_1_delete.Bind(EVT_BUTTON,self.OnDelete)
view.button_1_list.Bind(EVT_BUTTON,self.OnList)

def OnDelete(self, evt):
        self.presenter.updateModel("delete")
def OnList(self, evt):
        self.presenter.updateModel("list")

Probably you image that the boss of this program is updateModel function.
this function has this code:

def updateModel(self,Type):
        iptType=Type
        self.readGUI(iptType)  # This function takes the request info from
GUI
        packet=self.ipt_writeXML(iptType) # Put info in XML string
        self.sender.send(packet) #Send the XML string
        (xmlresponse,hostfrom)=self.receiver.receive() # Receive a XML
string response from agent and the IP of agent
        self.iptResponse.run(xmlresponse,hostfrom) # view response in a
separate view.

Now it works great, but there is a big problem: my app wait for response
before allow user to do another request.
I thought that with threads it could works perfectly.
I tried to apply threads but without any good result.
Have you idea how can i do it and how can i apply thread to it?
Thanks all!
--
Sbaush
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From aleaxit at yahoo.com  Tue Feb  7 11:12:35 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Tue, 7 Feb 2006 08:12:35 -0800
Subject: The problem of anonymity with decorators
References: <43e8c0bb$0$22678$79c14f64@nan-newsreader-07.noos.net>
Message-ID: <1hadqma.sm5cgl1oga6y7N%aleaxit@yahoo.com>

Franck Pommereau <pommereau at univ-paris12.fr> wrote:
   ...
>     import new
>     def rename (fun, name) :
>         return new.function(fun.func_code, {}, name)

You need to make a new code object too:

def int_result(fun) :
    def wrapped(*largs, **kwargs) :
        result = fun(*largs, **kwargs)
        if not isinstance(result, int) :
            raise TypeError, "should return int"
        return result
    w = wrapped.func_code
    c = new.code(w.co_argcount, w.co_nlocals, w.co_stacksize,
                 w.co_flags, w.co_code, w.co_consts, w.co_names,
                 w.co_varnames, w.co_filename, fun.func_name,
                 w.co_firstlineno, w.co_lnotab,
                 w.co_freevars, w.co_cellvars)
    return new.function(c, fun.func_globals, fun.func_name,
                        fun.func_defaults, wrapped.func_closure)

Of course, you should refactor these last three statement into a

def remix(wrapped, fun): ...
   """ return a function like 'wrapped' but w/name and defaults fm 'fun'
   """
   ...same 3 statements as above, from w = ... onwards...



Alex



From giles_brown at hotmail.com  Thu Feb 23 14:13:57 2006
From: giles_brown at hotmail.com (Giles Brown)
Date: 23 Feb 2006 11:13:57 -0800
Subject: How to move optparse from main to function?
References: <1140721179.096585.202560@g14g2000cwa.googlegroups.com>
Message-ID: <1140722037.144911.250900@g14g2000cwa.googlegroups.com>

Doesn't the module documentation ...

http://docs.python.org/lib/optparse-putting-it-all-together.html

... tell you what you need?

Giles



From niemand.leermann at thomas-guettler.de  Fri Feb  3 10:32:55 2006
From: niemand.leermann at thomas-guettler.de (Thomas Guettler)
Date: Fri, 03 Feb 2006 16:32:55 +0100
Subject: Best way to determine if a certain PID is still running
References: <mailman.1377.1138957128.27775.python-list@python.org>
Message-ID: <pan.2006.02.03.15.32.54.946364@thomas-guettler.de>

Am Thu, 02 Feb 2006 17:10:24 -0800 schrieb David Hirschfield:

> I'm launching a process via an os.spawnvp(os.P_NOWAIT,...) call.
> So now I have the pid of the process, and I want a way to see if that 
> process is complete.
> 
> I don't want to block on os.waitpid(), I just want a quick way to see if 
> the process I started is finished. I could popen("ps -p %d" % pid) and 
> see whether it's there anymore...but since pids get reused, there's the 
> chance (however remote) that I'd get a false positive, plus I don't 
> really like the idea of calling something non-pure-python to find out.

Hi,

at least on linux you can test this:
os.path.exists("/proc/%d" % mypid)

If you want to be sure that the pid is not reused, you
can look at: /proc/PID/cmdline

Maybe you can read the parent-pid in the proc directory. This should be
the pid if your script.

HTH,
 Thomas

-- 
Thomas G?ttler, http://www.thomas-guettler.de/
E-Mail: guettli (*) thomas-guettler + de
Spam Catcher: niemand.leermann at thomas-guettler.de



From roy at panix.com  Tue Feb 28 20:22:51 2006
From: roy at panix.com (Roy Smith)
Date: Tue, 28 Feb 2006 20:22:51 -0500
Subject: Use empty string for self
References: <1141170846.619246.163470@t39g2000cwt.googlegroups.com>
Message-ID: <roy-6BE725.20225128022006@reader2.panix.com>

paullanier at gmail.com wrote:
> Any comments?  Has this been discussed before?

Yes.  To death.  Executive summary: self is here to stay.


From johnjsal at NOSPAMgmail.com  Fri Feb 24 10:40:13 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 24 Feb 2006 15:40:13 GMT
Subject: a little more help with python server-side scripting
In-Reply-To: <43ff1d75$1_1@newspeer2.tds.net>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<dSoLf.1663$No6.38996@news.tufts.edu> <dtmhot$4t4$1@wake.carmen.se>
	<nTELf.1667$No6.38886@news.tufts.edu>
	<43ff1d75$1_1@newspeer2.tds.net>
Message-ID: <xNFLf.1672$No6.39067@news.tufts.edu>

Kent Johnson wrote:
> John Salerno wrote:
>> Magnus Lycka wrote:
>>
>>> The other option is ASP. You have been given information about
>>> that already. Be aware that ASP does not imply VBScript. You can
>>> use Python in ASP as long as that's enabled. It seems to be exactly
>>> what you are asking for, so I don't understand why you seem to reject
>>> it. Don't you like the file name endings?
>>
>>
>> Maybe I'm misunderstanding what is meant when you say to use ASP. I'm 
>> thinking that it involves having to learn another language (such as C# 
>> with ASP.NET), instead of writing my code in Python. Is that not the 
>> case?
> 
> See http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B276494
> 
> The last example on this page is exactly what you have been asking for.
> 
> Kent

But isn't this code:

Response.Write('Python Test<br>')
Response.write('<h3>Smaller heading</hr>')

written using ASP instead of Python?


From kmkz89 at gmail.com  Fri Feb 17 17:29:04 2006
From: kmkz89 at gmail.com (kmkz)
Date: 17 Feb 2006 14:29:04 -0800
Subject: python spawn new process, rout stdin/out
In-Reply-To: <BARGf.3747$MJ.3489@fed1read07>
References: <1139523177.415107.291710@g47g2000cwa.googlegroups.com>
	<BARGf.3747$MJ.3489@fed1read07>
Message-ID: <1140215344.231777.242000@o13g2000cwo.googlegroups.com>

How exactly do I map the main program's STDOUT (what the user sees) to
the subprocess' STDOUT? In effect I want it to appear as though they
just executed the program itself.



From onurb at xiludom.gro  Thu Feb 16 04:23:12 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Thu, 16 Feb 2006 10:23:12 +0100
Subject: Databases and python
In-Reply-To: <1140075451.474898.106320@g43g2000cwa.googlegroups.com>
References: <pan.2006.02.14.08.06.18.754312@dcs.nac.uci.edu>
	<1140075451.474898.106320@g43g2000cwa.googlegroups.com>
Message-ID: <43f4449f$0$27921$626a54ce@news.free.fr>

Jonathan Gardner wrote:
> I'm no expert in BDBs, but I have spent a fair amount of time working
> with PostgreSQL and Oracle. It sounds like you need to put some
> optimization into your algorithm and data representation.
> 
> I would do pretty much like you are doing, except I would only have the
> following relations:
> 
> - word to word ID
> - filename to filename ID
> - word ID to filename ID
> 
> You're going to want an index on pretty much every column in this
> database. 

stop !

I'm not a db expert neither, but putting indexes everywhere is well
known DB antipattern. An index is only useful if the indexed field is
discriminant enough (ie: there must be the less possible records having
the same value for this field). Else, the indexed lookup may end up
taking far more time than a simple linear lookup.  Also, indexes slow
down write operations.

> That's because you're going to lookup by any one of these
> columns for the corresponding value.
> 
> I said I wasn't an expert in BDBs. But I do have some experience
> building up large databases. In the first stage, you just accumulate
> the data. Then you build the indexes only as you need them.

Yes. And only where it makes sens.

(snip)

> And your idea of hundreds of thousands of tables? Very bad. Don't do
> it.

+100 on this


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From hancock at anansispaceworks.com  Sat Feb 18 14:57:09 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Sat, 18 Feb 2006 13:57:09 -0600
Subject: PyProtocols, Components, and Inheritance
In-Reply-To: <20060216235351.168b2e9f@samwise.anansi>
References: <20060216235351.168b2e9f@samwise.anansi>
Message-ID: <20060218135709.559d7398@samwise.anansi>

On Thu, 16 Feb 2006 23:53:51 -0600
Terry Hancock <hancock at anansispaceworks.com> wrote:
> I've been discussing PyProtocols with a a friend
> collaborating with me on a SF game project, about
> the benefits and design concept of "component
> architecture", and I'm a little confused by what I'm
> learning.
> [...]

Nevermind, he explained what he was doing -- it isn't
a PyProtocols issue after all.

He wanted components to be bound dynamically to
individual objects.  I agree with him that it's a useful
thing in this application.  It's still weird, but I
see why he wants it.

Now, I just have to figure out how to document it
clearly. ;-)

Thanks anyway,
Terry


-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From scott.daniels at acm.org  Tue Feb 14 20:12:42 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Tue, 14 Feb 2006 17:12:42 -0800
Subject: Newbie
In-Reply-To: <mailman.1927.1139964848.27775.python-list@python.org>
References: <v3JHf.2731$lo3.2501@trnddc07>	<43ef6433$0$25387$636a55ce@news.free.fr>	<HZJHf.2737$lo3.1139@trnddc07>	<1139806792.698674.168530@g44g2000cwa.googlegroups.com>	<PCuIf.32401$lo3.15259@trnddc07>	<1139963955.22163.6.camel@kenshin>
	<mailman.1927.1139964848.27775.python-list@python.org>
Message-ID: <43f27ea8$1@nntp0.pdx.net>

Ken Stevens wrote:
> Felipe Almeida Lessa wrote:
>> Em Qua, 2006-02-15 ?s 00:30 +0000, LittlePython escreveu:
>>> ....
>> Please start by not top-posting ;-)....
> Sigh! This has been bothering me for some time. I tend to bottom post 
> primarily because people here are so anal about it.
> 
> In any case, I actually prefer top posting....

The rule here is _neither_ top post _nor_ bottom post.  Show _only_the_
_relevant_part_ (including what you are replying to), and then reply to
it.  This often means interspersed quotes and replies.  If a reader
wants the whole previous message, we have google groups (or other
archives).  This is not your email, but a public board that others
will later search for answers.

--Scott David Daniels
scott.daniels at acm.org


From UrsusMaximus at gmail.com  Fri Feb 10 11:50:29 2006
From: UrsusMaximus at gmail.com (UrsusMaximus at gmail.com)
Date: 10 Feb 2006 08:50:29 -0800
Subject: Rethinking the Python tutorial
References: <dsfqv4$shc$1@wake.carmen.se>
Message-ID: <1139590229.811612.79580@g44g2000cwa.googlegroups.com>

There are now more than 300 tutorials listed at
www.awaretek.com/tutorials.html so one could even imagine a
"mega-tutorial" using the best-of-breed tutorial for each sub-section,
a la Turbogears ;-)))

Of course it might bear an unholy resemblance to a FrankenTutorial
;-)))

Ron Stephens



From kent at kentsjohnson.com  Tue Feb 21 17:44:32 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Tue, 21 Feb 2006 17:44:32 -0500
Subject: Module question
In-Reply-To: <1140559897.172126.43820@o13g2000cwo.googlegroups.com>
References: <1140559897.172126.43820@o13g2000cwo.googlegroups.com>
Message-ID: <43fb934f$1_1@newspeer2.tds.net>

Tuvas wrote:
> I know this is probably a very simple question, but I am building a
> program that is now at about 2400 lines of code in the main module. I
> need to break it up, however, there are certain variables that I would
> like to use among all of them, namely the TKinter background. It's
> build using tkinter, so, to do anything useful requires having the
> master=Tk() variable portable in every interface. I can't just pass
> this variable, the real way to do it is to have a global variable. How
> can I do this? Thanks!

You don't say what the program does, but try to identify code that does 
the actual work and put it in separate modules that implement a data 
model or business logic for the program. These modules should be 
independent of Tkinter.

Kent


From blair.houghton at gmail.com  Tue Feb  7 01:01:48 2006
From: blair.houghton at gmail.com (Blair P. Houghton)
Date: 6 Feb 2006 22:01:48 -0800
Subject: in over my head ascii
References: <1139245216.350356.272170@z14g2000cwz.googlegroups.com>
	<sk4fu1ljvt7h7d6euj7nq06e1e0ml8p8u5@4ax.com>
	<1139251420.501345.91850@g44g2000cwa.googlegroups.com>
	<1139256817.218319.160370@f14g2000cwb.googlegroups.com>
	<1139259694.603482.293660@g14g2000cwa.googlegroups.com>
	<1139260158.822523.308780@g47g2000cwa.googlegroups.com>
	<1139273414.645101.237780@z14g2000cwz.googlegroups.com>
Message-ID: <1139289681.648488.7060@g43g2000cwa.googlegroups.com>

mensanator at aol.com wrote:
> What do you bet the server software was written by someone
> who thought ASCII STX meant literally the characters "STX"?

Wouldn't explain the "ENX" instead of "ETX".

> I've seen stupider things.

I give it 25% probability of being what you said, and 75% probability
that they didn't want to send any characters that couldn't be printed
in plaintext.

I've seen literally dozens of this kind of roll-your-own serial
protocol in the past few years, and they're all indicative that no two
are alike.  Ever read the ARINC 429 documents? They'll curl your toes.

--Blair
  "It's protocols all the way down."



From fakeaddress at nowhere.org  Mon Feb  6 13:52:23 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Mon, 06 Feb 2006 18:52:23 GMT
Subject: Thread imbalance
In-Reply-To: <1139248342.222672.304350@o13g2000cwo.googlegroups.com>
References: <1138912272.382474.13170@g44g2000cwa.googlegroups.com>
	<ds3d35$mo6$2@bagan.srce.hr>
	<mailman.1427.1139097680.27775.python-list@python.org>
	<ds55tb$n00$1@bagan.srce.hr>
	<lukcu19iaqamsm5ohs618ckp169csrq8ql@4ax.com>
	<ds698k$n5l$2@bagan.srce.hr>
	<1139197849.994966.150810@z14g2000cwz.googlegroups.com>
	<oxLFf.30420$H71.26518@newssvr13.news.prodigy.com>
	<1139248342.222672.304350@o13g2000cwo.googlegroups.com>
Message-ID: <HVMFf.52292$PL5.13025@newssvr11.news.prodigy.com>

Tuvas wrote:
> The read function used actually is from a library in C, for use over a
> CAN interface. The same library appears to work perfectly find over C.
[...]
> When nothing is happening, the thread runs pretty consistantly at 1
> second. However, when it is doing IO through this C function or
> whatever, the length of time increases, for the time.sleep() function.
> Kind of strange, isn't it? I can explain in more detail if it's needed,
> but I don't know how much it'll help...

That's enough detail that I'll take a most-likely-guess:

When your C function runs, by default you hold the aforementioned
Global Interpreter Lock (GIL). Unless you explicitly release it,
you will hold it until you return, and nothing else will run.
Python's own I/O operations always release the GIL right before
calling any potentially-blocking operation, and reacquire it
right after.

See:

     http://docs.python.org/api/threads.html


-- 
--Bryan


From felipe.lessa at gmail.com  Sun Feb 12 17:28:52 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sun, 12 Feb 2006 20:28:52 -0200
Subject: Another n00b: Removing the space in "print 'text', var"
In-Reply-To: <43efb1ba$0$14855$c3e8da3@news.astraweb.com>
References: <43efb1ba$0$14855$c3e8da3@news.astraweb.com>
Message-ID: <1139783332.7547.11.camel@kenshin>

Em Dom, 2006-02-12 ?s 22:11 +0000, HappyHippy escreveu:
> More of a minor niggle than anything but how would I remove the 
> aforementioned space?
> 
> eg.
> strName = 'World'
> print 'Hello', strName, ', how are you today?'
> 
> comes out as "Hello World , how are you today?"

strname = 'World'
print 'Hello %s, how are you today?' % strname

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From steve at holdenweb.com  Sat Feb 25 09:14:28 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 25 Feb 2006 09:14:28 -0500
Subject: Problem with Property
In-Reply-To: <TsydnRFxOJsBw53ZnZ2dnUVZ_tqdnZ2d@comcast.com>
References: <TsydnRFxOJsBw53ZnZ2dnUVZ_tqdnZ2d@comcast.com>
Message-ID: <dtpoo2$r41$1@sea.gmane.org>

"none <"@bag.python.org wrote:
> I'm trying to implement a simple repeateable property mechansism so I 
> don't have to write accessors for every single instance variable I have.

Please don't do that. The Python way is to use direct access to instance 
variables unless there's a good reason not to.

Is there some reason why you want to run get/set code for every instance 
variable access, or are you just experimenting to see whether it can be 
done?

It seems particularly odd to want to put getters and setters behind 
property access. What does the extra layer buy you?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From franz.steinhaeusler at gmx.at  Mon Feb 20 09:06:02 2006
From: franz.steinhaeusler at gmx.at (Franz Steinhaeusler)
Date: Mon, 20 Feb 2006 15:06:02 +0100
Subject: editor for Python on Linux
References: <dtai6e$23m$2@ariane.blic.net>
Message-ID: <54jjv19g8o4e2ojbcmp6f56s2uhd1oj21g@4ax.com>

On Sun, 19 Feb 2006 20:52:54 +0100, Mladen Adamovic
<adamm_n0 at spamm_blic.net> wrote:

>Hi!
>
>I wonder which editor or IDE you can recommend me for writing Python 
>programs. I tried with jEdit but it isn't perfect.

Maybe you try out DrPython.

(Written in Python and wxPython, Autocompletion, Calltips,
easily extensible with plugins and scripts, source browser, ...)
-- 
Franz Steinhaeusler


From duncanm255 at hotmail.com  Fri Feb 10 21:41:38 2006
From: duncanm255 at hotmail.com (D)
Date: 10 Feb 2006 18:41:38 -0800
Subject: Socket Programming - Question
In-Reply-To: <11uqefs4f3gq617@corp.supernews.com>
References: <1139616664.208516.254900@f14g2000cwb.googlegroups.com>
	<11uqefs4f3gq617@corp.supernews.com>
Message-ID: <1139625698.583778.167140@f14g2000cwb.googlegroups.com>

I've used os.popen() before, but if I execute it on a remote system how
could I get the output back to the requesting machine?



From anton.vredegoor at gmail.com  Sun Feb 12 07:56:18 2006
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: 12 Feb 2006 04:56:18 -0800
Subject: two generators working in tandem
References: <20060210214512.6383.qmail@web36710.mail.mud.yahoo.com>
	<mailman.1742.1139662513.27775.python-list@python.org>
Message-ID: <1139748978.407225.125380@g47g2000cwa.googlegroups.com>


Michael Spencer wrote:

> This returns an iterator that 'nests' an arbitrary number of sequences
> (odometer-style).
>
> def nest(*sequences):
>      def _nest(outer, inner):
>          for outer_item in outer:
>              if not isinstance(outer_item, tuple):
>                  outer_item = (outer_item,)
>              for inner_item in inner:
>                  yield outer_item + (inner_item,)
>      return reduce(_nest, sequences)

Nice!

Here's a nonrecursive version. It creates a list of iterators that are
repeating their values just enough times to sychronize the nesting. I
wonder if 'ncycle' would be a useful generalization for itertools'
'cycle' function.

Anton

def ncycle(seq,n):
    while True:
        for x in seq:
            for dummy in xrange(n):
                yield x

def cross(*args):
    p = 1
    R = []
    for arg in args[::-1]:
        L = list(arg)
        R.append(ncycle(L,p))
        p *= len(L)
    R.reverse()
    for dummy in xrange(p):
        yield [x.next() for x in R]

def test():
    s1='a1','a2','a3','a4'
    s2='b1','b2'
    s3='c1','c2','c3'
    for x in cross(s1,s2,s3):
        print x

if __name__=='__main__':
    test()



From Plissken.s at gmail.com  Sun Feb 26 14:46:37 2006
From: Plissken.s at gmail.com (Plissken.s at gmail.com)
Date: 26 Feb 2006 11:46:37 -0800
Subject: How can I redirect print function to an output file?
Message-ID: <1140983197.579809.93850@v46g2000cwv.googlegroups.com>

I am using the print function in my python script.
Can you please tell me what can I do to redirect the output to an file?

Thank you.



From asma61 at dsl.pipex.com  Fri Feb  3 20:45:18 2006
From: asma61 at dsl.pipex.com (DaveM)
Date: Sat, 04 Feb 2006 01:45:18 +0000
Subject: Global variables, Classes, inheritance
Message-ID: <uc08u1p09gleqcbasarcg1714rir7t0vrs@4ax.com>

Although I've programmed for fun - on and off - since the mid 70's, I'm
definitely an OO (and specifically Python) beginner. 

My first question is about global variables. Are they, as I'm starting to
suspect, a sin against God or just best avoided? Having got my current
application working using them, I'm not sure whether I want to refactor it,
but equally, I'd like to write the best code I can.

Secondly (and this is related),  if you have multiple instances of the same
class, but need them all to have access to a dictionary created at run-time,
is there a class way to this without calling the creation method multiple
times? The best thought I've come up with is for the class instance to check
its name and only if it's the first one do the dictionary creation, but I
haven't tried it yet.

My third difficulty is with variables in a class. What's the difference
between the following?:

class Foo:
    i = 12345
    ...

class Foo:
    self.i = 12345
    ...

class Foo:
    def __init__(self):
        self.i = 12345
        ...

class Foo:
    def __init(self):
        i = 12345
        ...

DaveM


From fccoelho at gmail.com  Thu Feb  2 17:41:01 2006
From: fccoelho at gmail.com (Flavio)
Date: 2 Feb 2006 14:41:01 -0800
Subject: PyQt: QListView how to retrieve selected items?
In-Reply-To: <44fdrsF1tinnU1@uni-berlin.de>
References: <1138907537.417067.228570@z14g2000cwz.googlegroups.com>
	<44f50sF1u9c3U1@uni-berlin.de>
	<1138916365.766264.152280@z14g2000cwz.googlegroups.com>
	<44fdrsF1tinnU1@uni-berlin.de>
Message-ID: <1138920061.665124.169280@g43g2000cwa.googlegroups.com>

> Who has created these items? Obviously you, so you _can_ store the list
> of selected items.

well yeah, but the Idea was to let the user select(through the widget)
a subset of the original list and then access that subset...

> Or you use the equally well documented QListViewItemIterator to traverse
> the list of items.

Alright! Now you've hit the jackpot! I didn't know that class! There is
no  reference to it in the QListView docs! This can solve my problem
(combined with isSelected()), though not as elegantly or efficiently as
having direct access to the set of selected items which already exists
but is not accessible...

Thanks Diez!



From Matt  Sun Feb 19 22:50:56 2006
From: Matt (Matt)
Date: Mon, 20 Feb 2006 03:50:56 GMT
Subject: Mac OS X Installation Problem
Message-ID: <yEncExpress_Rulz!_www.techsono.com_3223252257@firstva.com>

Kevin Walzer <sw at wordtech-software.com> wrote:

>It's not considered a good idea to trash Apple system files. It's likely
>that system tools that depend on Python (CoreImage scripting comes to
>mind) are now broken and the only way to fix this is to reinstall the OS.

Thanks for the heads up. I thought that Apple had included Python as a 
convenience for its customers. I didn't realize it was actually being used by 
OS X. My Mac seems to be behaving OK, so maybe I don't use any of the Python 
parts, but I will keep that in mind in case it goes haywire in the future.

But this begs the question, how do we upgrade our Python installations if OS X 
needs a certain version? Do we leave the pre-installed version alone and run a 
second Python installation? I suppose that the various package installers 
would know how to do that, right?

Thanks,
Matt





From dbough77 at yahoo.com  Tue Feb 21 19:50:30 2006
From: dbough77 at yahoo.com (DannyB)
Date: 21 Feb 2006 16:50:30 -0800
Subject: Basic coin flipper program - logical error help
In-Reply-To: <43fbb379$0$11076$e4fe514c@news.xs4all.nl>
References: <1140567243.251982.255620@g14g2000cwa.googlegroups.com>
	<43fbb379$0$11076$e4fe514c@news.xs4all.nl>
Message-ID: <1140569430.047982.278410@f14g2000cwb.googlegroups.com>

Thanks everyone for your insight.

I'm coming from C++ - I'm used to formatting code with {} instead of
whitespaces.

@Larry - this isn't my homework :P  I'm actually taking a VB.NET class
in school.

I was teaching myself C++ but decided to scale back to Python.  I've
heard it was a bit easier to understand and it cuts your development
time by at least 50% (I've heard 90%).

Logically I can figure things out - its the formatting of the logic in
Python that is messing me up.  I'll get it soon enough =)



From michaeltaft at gmail.com  Sun Feb 12 16:33:29 2006
From: michaeltaft at gmail.com (mwt)
Date: 12 Feb 2006 13:33:29 -0800
Subject: Downloading Large Files -- Feedback?
In-Reply-To: <7x3bioxrnj.fsf@ruckus.brouhaha.com>
References: <1139773494.245577.102870@g47g2000cwa.googlegroups.com>
	<7x3bioxrnj.fsf@ruckus.brouhaha.com>
Message-ID: <1139780009.673785.51270@g14g2000cwa.googlegroups.com>

Pardon my ignorance here, but could you give me an example of what
would constitute file that is unreasonably or dangerously large? I'm
running python on a ubuntu box with about a gig of ram.

Also, do you know of any online examples of the kind of robust,
real-world code you're describing? 

Thanks.



From kp8 at mac.com  Fri Feb 24 03:08:47 2006
From: kp8 at mac.com (kpp9c)
Date: 24 Feb 2006 00:08:47 -0800
Subject: ls files --> list packer
In-Reply-To: <1140767111.490691.42460@e56g2000cwe.googlegroups.com>
References: <1140765792.864556.289820@i40g2000cwc.googlegroups.com>
	<1140767111.490691.42460@e56g2000cwe.googlegroups.com>
Message-ID: <1140768527.006363.29050@i39g2000cwa.googlegroups.com>

cool i just tried:

>>> import os
>>>snd_filelist = [f for f in os.listdir('/Users/foo/snd') if f.endswith('.aif')]


and it worked! and will take a huge bite out of my big script ... which
i make by doing an ls
in the terminal and editing (boo hoo)

one one lc and one import!

cool..

that other sillyness i mentioned is not strickly required  ... just
dreaming but i know involves some kind of os walk type thing prolly ...
meanwhile this is so exciting!

Thank you!!!!



From mrmakent at cox.net  Wed Feb  8 12:19:21 2006
From: mrmakent at cox.net (mrmakent at cox.net)
Date: 8 Feb 2006 09:19:21 -0800
Subject: breadth first search
References: <43ea2271$1@127.0.0.1><43EA2474.7010109@plope.com>
Message-ID: <1139419161.133517.47010@g43g2000cwa.googlegroups.com>

Chris McDonough wrote:

> L = []
> [L.append(line) for line in (open('filename.txt')]

Ouch.

Did you perhaps mean:

L = [ line for line in open('filename.txt') ]

Or, with better error handling:

try:
    f = open('filename.txt')
except IOError:
    # handle error here
else:
    L = [ line for line in f ]



From "jay\" at (none)  Mon Feb 27 05:05:14 2006
From: "jay\" at (none) (none)
Date: Mon, 27 Feb 2006 03:05:14 -0700
Subject: Is Python a Zen language?
In-Reply-To: <eer9d3-81t.ln1@lairds.us>
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
	<1140878147.541074.233540@i40g2000cwc.googlegroups.com>
	<1140879469.853398.322850@i40g2000cwc.googlegroups.com>
	<1140903119.580735.108440@e56g2000cwe.googlegroups.com>
	<eer9d3-81t.ln1@lairds.us>
Message-ID: <esGdnR0qGoIzL5_ZRVn-gg@comcast.com>

Cameron Laird wrote:
> In article <1140903119.580735.108440 at e56g2000cwe.googlegroups.com>,
> Kay Schluehr <kay.schluehr at gmx.net> wrote:
> 			.
> 			.
> 			.
> 
>>Lucid in the mid 80s that gone down a few years later. As it turned out
>>that time Lisp was not capable to survive in what we call today a
>>"heterogenous environment". It was strongly too self-centered. So I
> 
> 			.
> 			.
> 			.
> Smalltalk, too.  And, in a different way, Pascal.

I had the same thought.  Smalltalk is a wonderful environment but it 
doesn't really play well with others.  Smalltalk really wants to be 
*the* environment where the language is just a scripting tool within 
this larger environment of object manipulation, and it's really cool at 
that, but as a language for 'business apps' ina  heterogenous 
environment out it's own image, it's akward sometimes


From mensanator at aol.com  Thu Feb  9 14:27:45 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 9 Feb 2006 11:27:45 -0800
Subject: Pulling all n-sized combinations from a list
In-Reply-To: <mailman.1675.1139510184.27775.python-list@python.org>
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>
	<1139509392.890581.94470@g43g2000cwa.googlegroups.com>
	<mailman.1675.1139510184.27775.python-list@python.org>
Message-ID: <1139513265.440321.184530@o13g2000cwo.googlegroups.com>


Fredrik Lundh wrote:
> mensanator at aol.com wrote:
>
> > > It is a C extension that does permutations & combinations and is
> > > about 10x faster than doing it in pure python [I'm the author].
> > > It is also the 3rd result for "python combination" and 5th for
> > > "python permutaiton" but every month someone posts to c.l.py asking
> > > for something similar.  Go figure.
> >
> > Did you ever figure that some people use Windows?
>
> Windows don't support C ?  that was a new one.

Windows comes with a C compiler? That's news to me.

> 
> </F>



From sam at nuevageorgia.com  Tue Feb 14 10:42:13 2006
From: sam at nuevageorgia.com (SamFeltus)
Date: 14 Feb 2006 07:42:13 -0800
Subject: Embedding an Application in a Web browser
In-Reply-To: <mailman.1903.1139930594.27775.python-list@python.org>
References: <mailman.1903.1139930594.27775.python-list@python.org>
Message-ID: <1139931733.366574.125370@g14g2000cwa.googlegroups.com>

Didn't ActiveState or somebody have a Python plugin to run Python on IE?



From lycka at carmen.se  Wed Feb  1 06:05:09 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 01 Feb 2006 12:05:09 +0100
Subject: Python vs C for a mail server
In-Reply-To: <1138727454.449956.253900@g47g2000cwa.googlegroups.com>
References: <1138430628.788687.40170@g14g2000cwa.googlegroups.com>
	<pan.2006.01.28.07.03.55.971146@REMOVETHIScyber.com.au>
	<1138433792.970322.95810@g43g2000cwa.googlegroups.com>
	<11tmcj2c35hmu47@corp.supernews.com>
	<1138439841.267886.97600@o13g2000cwo.googlegroups.com>
	<1138445796.313796.135590@g43g2000cwa.googlegroups.com>
	<9mhI0D4+ciB@jens-theisen.de>
	<1h9v91c.y5fonwzcyjupN%aleax@mail.comcast.net>
	<1138727454.449956.253900@g47g2000cwa.googlegroups.com>
Message-ID: <drq4l5$sl6$1@wake.carmen.se>

Randall Parker wrote:
> I return objects in Python and in C++. In C++ I can see what their
> types are right on the m method signature. In Python I've got to write
> a comment on the line above it. 

Ouch! Don't do that! As you've noticed, it's not very maintainable.

First of all, if you want to use Python well, embrace it's dynamic
nature, don't try to restrain it! It takes some time to let go of
the static thinking if one is used to it, but try. Just as lots of
programming guidelines (e.g. Parna's Principle and The Law of
Demeter) tells us that we should try to know and depend as little
as possible on the details in other pieces of code, the duck typing
behaviour in Python extends this one step further, to types.

Without proper tests, this might cause more problems than it solves,
but there is no excuse for not having proper automated tests for
software you develop in the 21st century!!!

You *don't* write an unmaintainable comment about what return
type to expect, you write unit tests that shows you how to use
each API that you implement. You run these tests often, fix them
as soon as they break, and you encourage their use as
documentation which describes through examples how to use you
APIs. (Sorry about the imperative tone. It's your life after
all, but don't blame Python for not fitting your style of
development.)

You should do that for statically typed languages as well. Knowing
that you got the correct type back gives you no assurance that
you got the right value!


From paul at boddie.org.uk  Wed Feb 15 11:15:48 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 15 Feb 2006 08:15:48 -0800
Subject: Encryption application/NEED A HACKER TO TRY IT
References: <cda778180602150718o325826a6ga658b31339aa82d4@mail.gmail.com>
	<mailman.1953.1140017441.27775.python-list@python.org>
Message-ID: <1140020148.208811.133510@z14g2000cwz.googlegroups.com>

Fredrik Lundh wrote:
> "atanas Cosmas Nkelame" <atanasy at gmail.com> wrote:
>
> > I'm putting here the 'encoded' text for someone to try to encipher the text
> > or tell me what is the chance that one can encipher the text.

[From an FAQ on the subject...]

>     "I just came up with this neat method of encryption. Here's some
>     ciphertext: FHDSIJOYW^&%$*#@OGBUJHKFSYUIRE. Is it strong?'' Without a
>     doubt questions like this are the most annoying traffic on sci.crypt.

[...]

>     There are some
>     systematic and unsystematic ways to take reasonably long ciphertexts
>     and decrypt them even without prior knowledge of the algorithm, but
>     this is a time-consuming and possibly fruitless exercise which most
>     sci.crypt readers won't bother with.

And in any case, there are surely more interesting challenges of this
nature than some random person's "elite" cryptography skills:

http://www.math.ucr.edu/home/baez/voynich.html

Paul



From duncan.booth at invalid.invalid  Fri Feb 10 03:56:55 2006
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 10 Feb 2006 08:56:55 GMT
Subject: how to remove <BR> using replace function?
References: <1139462640.951603.302830@g44g2000cwa.googlegroups.com>
	<1139469846.713121.219060@g47g2000cwa.googlegroups.com>
	<1139472365.378523.141150@g44g2000cwa.googlegroups.com>
	<Xns9765591BFA42Cduncanbooth@127.0.0.1>
	<FYC*P8S+q@news.chiark.greenend.org.uk>
Message-ID: <Xns97665A6F262CEduncanbooth@127.0.0.1>

Sion Arrowsmith wrote:

> Duncan Booth  <duncan.booth at suttoncourtenay.org.uk> wrote:
>>Although I generally advise against overuse of regular expressions,
>>this is one situation where regular expressions might be useful: [ ...
>>] 
>>>>> nobr = re.compile('\W*<br.*?>\W*', re.I)
> 
> Agreed (on both counts), but r'\s*<br.*?>\s*' might be better
> (consider what happens with "an unfortunate... <br> in the middle"
> if you use \W rather than \s).
> 

Yes, I don't really know why I wrote \W when I obviously meant \s. Thanks 
for correcting that.

Even better might be r'(\s*<br.*?>)+\s*' to get multiple runs of <br> tags.


From thelinuxmaster at gmail.com  Mon Feb 13 21:31:44 2006
From: thelinuxmaster at gmail.com (Eric McGraw)
Date: 13 Feb 2006 18:31:44 -0800
Subject: invert the order of a string
In-Reply-To: <7x7j7yixit.fsf@ruckus.brouhaha.com>
References: <dsr600$9sj$1@solaris.cc.vt.edu>
	<6272v111vee95606gd7fucjdqmec8uhc7e@4ax.com>
	<dsr6n3$amh$1@solaris.cc.vt.edu>
	<aq72v1l60fo3rv1r8oq9np7nc7i5ikueer@4ax.com>
	<dsr7q6$cnv$1@solaris.cc.vt.edu>
	<7x7j7yixit.fsf@ruckus.brouhaha.com>
Message-ID: <1139884304.721510.106640@g14g2000cwa.googlegroups.com>

> Well, it turns out to be the best way to invert a string, IMO. The
> reversed() feature returns a reversed object... not a reversed string.
> In short, I have to fool with it again _after_ it has been inverted. The
> slicing takes care of the job right away and gives me what I want... no
> Computer Sciencey <reversed object at 0xb6f6152c>> to deal with :)

A <reversed object> can be turned back into a string:
 >>> st = '0123456789'
 >>> reversed(st)
 <reversed object at 0x00A8CC50>
 >>> ''.join( reversed(st) )
 '9876543210'

>
> I'm sure the reversed feature is much more generic though for dealing
> with other types.



From swilson at acs.on.ca  Tue Feb  7 04:59:17 2006
From: swilson at acs.on.ca (swilson at acs.on.ca)
Date: 7 Feb 2006 01:59:17 -0800
Subject: HTMLDocument and Xpath
In-Reply-To: <1138976474.052819.202050@z14g2000cwz.googlegroups.com>
References: <1138930478.957440.104290@g14g2000cwa.googlegroups.com>
	<1138968531.707677.74000@g14g2000cwa.googlegroups.com>
	<1138976474.052819.202050@z14g2000cwz.googlegroups.com>
Message-ID: <1139306357.434802.46710@g43g2000cwa.googlegroups.com>

Got the answer - there's a bug in xpath.  I think the HTML parser
converts all the tags (but not the attributes) to uppercase.  Xpath
definitely does not like my first string but, these work fine:

test = Evaluate('//TD', doc_node.documentElement)
test = Evaluate('/HTML/BODY/TABLE/TR/TD', doc_node.documentElement)
test = Evaluate('/HTML/BODY/TABLE/TR/TD[1]', doc_node.documentElement)

Shawn



From neuzhoundxx at yahoo.com  Fri Feb 10 16:45:12 2006
From: neuzhoundxx at yahoo.com (john peter)
Date: Fri, 10 Feb 2006 13:45:12 -0800 (PST)
Subject: two generators working in tandem
Message-ID: <20060210214512.6383.qmail@web36710.mail.mud.yahoo.com>

I'd like to write two generators: one is a min to max sequence number generator that
  rolls over to min again once the max is reached. the other is a generator that cycles
  through N (say, 12) labels. currently, i'm using these generators in nested loops like
  this:
   
  seq_numbers = genSeqNum(min,max)
  for label in genLabel():
     for some_date in genDate(init):
        for i in xrange(0, LIMIT):
           print label, some_date, i, seq_numbers.next()
   
  The problem I'm trying to solve is this:
  when the seq_numbers generator rolls over, the label generator must be advanced
  to the next one "in tandem". does anyone has any suggestion? thanks for any hepl!

		
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From sw at wordtech-software.com  Tue Feb 14 00:31:32 2006
From: sw at wordtech-software.com (Kevin Walzer)
Date: Tue, 14 Feb 2006 00:31:32 -0500
Subject: Jedit
In-Reply-To: <ziggy-358301.20045813022006@netnews.asp.att.net>
References: <ziggy-358301.20045813022006@netnews.asp.att.net>
Message-ID: <43F16B34.1070505@wordtech-software.com>

ziggy wrote:
> Just wondering if there is something out there like Jedit, but written 
> in python ( not just supporting, but actually written in it.. )
> 
> Nothing large like Stanzi's or Boa.. Just something quick and simple, 
> with code completion, and a debugger..

IDLE


From onurb at xiludom.gro  Thu Feb  9 12:33:18 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Thu, 09 Feb 2006 18:33:18 +0100
Subject: Finding the public callables of self
In-Reply-To: <B4s*gZT+q@news.chiark.greenend.org.uk>
References: <1139501230.964886.190500@g43g2000cwa.googlegroups.com>
	<B4s*gZT+q@news.chiark.greenend.org.uk>
Message-ID: <43eb7cfa$0$7213$626a54ce@news.free.fr>

Sion Arrowsmith wrote:
> Russell Warren <russandheather at gmail.com> wrote:
(snip)
> At first I thought self.__dict__ would do it, but callable methods
>>seem to be excluded so I had to resort to dir, and deal with the
>>strings it gives me. 
> 
> This last sentence suggests to me something like:
> 
>     attrs = set(s for s in dir(self) if not s.startswith('_'))
>     myCallables = attrs.difference(a.__dict__)
err... s/a.__dict__/self.__dict__/

>     return list(myCallables)


Won't work as expected:

>>> class Tricky(object):
...     class_attrib = 42
...     def __init__(self, attr):
...             self.attr = attr
...     def doit(self):
...             if callable(self.attr):
...                     return self.attr(self)
...
>>> t = Tricky(lambda obj: obj.__class__.__name__)
>>> t
<__main__.Tricky object at 0x2aaaaab28ed0>
>>> def getcallables(obj):
...     attrs = set(s for s in dir(obj) if not s.startswith('_'))
...     callables = attrs.difference(obj.__dict__)
...     return list(callables)
...
>>> getcallables(t)
['doit', 'class_attrib']
>>> t.attr(t)
'Tricky'
>>> t.class_attrib()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: 'int' object is not callable


There are 2 reliable ways to know if an object is callable:
- using callable()
- trying to call it


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From larry.bates at websafe.com  Sat Feb  4 16:50:00 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Sat, 04 Feb 2006 15:50:00 -0600
Subject: Webmail with Python
In-Reply-To: <pan.2006.02.04.20.02.29.212441@thomas-guettler.de>
References: <pan.2006.02.04.20.02.29.212441@thomas-guettler.de>
Message-ID: <CPmdnQJE1oHmvHjenZ2dnUVZ_tadnZ2d@comcast.com>

Thomas Guettler wrote:
> Hi,
> 
> Is there an application like Squirrelmail[1] written in python?
> 
> I want to access IMAP folder with a web-browser.
> 
> Google shows me some dead projects. Most webmail applications
> seem to be written in PHP. Is there a useable webmailer written
> in python?
> 
> 
>  Thomas
> 
Google turned up the following:

http://bobomail.sourceforge.net/

Larry Bates


From george.sakkis at gmail.com  Wed Feb  8 13:56:09 2006
From: george.sakkis at gmail.com (George Sakkis)
Date: 8 Feb 2006 10:56:09 -0800
Subject: os.walk() dirs and files
References: <dscrjr$joa$1@solaris.cc.vt.edu><dscs1j$k9l$1@solaris.cc.vt.edu>
	<Xns97648B528F8DDduncanbooth@127.0.0.1>
	<dsct5a$lsp$1@solaris.cc.vt.edu>
Message-ID: <1139424969.392016.278030@o13g2000cwo.googlegroups.com>

rtilley wrote:
> Duncan Booth wrote:
>
>> How about just concatentating the two lists:
>>
>>> for root, dirs, files in os.walk(path):
>>
>>        for fs_object in files + dirs:
>>
>>>         ADD fs_object to dictionary
>
>
> Thank you Duncan! that solves the problem perfectly!

Or a bit more efficiently (no need to allocate a new list for storing
files+dirs):

from itertools import chain
for root, dirs, files in os.walk(path):
	for fs_object in chain(files,dirs):
		ADD fs_object to dictionary

Or you can download the path.py module
(http://www.jorendorff.com/articles/python/path/):

from path import path
for fs_object in path(root).walk():
	ADD fs_object to dictionary


George



From johnjsal at NOSPAMgmail.com  Thu Feb 16 10:18:29 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 16 Feb 2006 15:18:29 GMT
Subject: question about scope
Message-ID: <9J0Jf.1630$No6.38274@news.tufts.edu>

Here's a sentence from Learning Python:

"Names not assigned a value in the function definition are assumed to be 
enclosing scope locals (in an enclosing def), globals (in the enclosing 
module's namespace) or built-in (in the predefined __builtin__ names 
module Python provides."

I have trouble reading this sentence. First, I don't understand if the 
word 'enclosing' is a verb or an adjective. The whole flow of the 
sentence seems convoluted.

But my real question is this, which is related to the above:

"Name references search at most four scopes: local, then enclosing 
functions (if any), then global, then built-in."

I understand what global and built-in are, and I thought I understood 
the concept of local too, but when I got to this sentence (and the 
previous sentence), I became confused about the first two scopes. What's 
the difference between 'local' and 'enclosing functions'? I thought that 
the only way to create a local namespace was if there *was* a function 
definition, so now I'm confused by the apparent difference that the 
authors are referring to. What's an example of a local scope without 
having a function definition? Loops and if statements, perhaps?

And feel free to dissect that first sentence up above, because I just 
don't get it.

Thanks.


From robert.kern at gmail.com  Mon Feb  6 12:44:27 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 06 Feb 2006 11:44:27 -0600
Subject: Scientific Computing with NumPy
In-Reply-To: <ds7mrb$443$1@gemini.csx.cam.ac.uk>
References: <ds7bvh$ab1$2@gemini.csx.cam.ac.uk>	<mailman.1482.1139225595.27775.python-list@python.org>	<ds7ch4$bj7$1@gemini.csx.cam.ac.uk>	<1139229403.024321.215780@o13g2000cwo.googlegroups.com>
	<ds7mrb$443$1@gemini.csx.cam.ac.uk>
Message-ID: <ds81to$vnu$1@sea.gmane.org>

mclaugb wrote:
> Is Scipy the same thing as ScientificPython?
> I am confused if SciPy is just the new version.  they appear to be separate 
> things.

They are separate projects.

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From userprogoogle-139 at yahoo.co.uk  Thu Feb 16 07:47:51 2006
From: userprogoogle-139 at yahoo.co.uk (rodmc)
Date: 16 Feb 2006 04:47:51 -0800
Subject: MySQL
Message-ID: <1140094071.287878.55580@f14g2000cwb.googlegroups.com>

I need to write a Python application which connects to a MySQL 5.0
database. Can anyone point me in the right direction or a compatible
library?

Best,

rod



From peter at engcorp.com  Sun Feb  5 12:34:26 2006
From: peter at engcorp.com (Peter Hansen)
Date: Sun, 05 Feb 2006 12:34:26 -0500
Subject: Thread imbalance
In-Reply-To: <ds55tb$n00$1@bagan.srce.hr>
References: <1138912272.382474.13170@g44g2000cwa.googlegroups.com>	<ds3d35$mo6$2@bagan.srce.hr>	<mailman.1427.1139097680.27775.python-list@python.org>
	<ds55tb$n00$1@bagan.srce.hr>
Message-ID: <ds5cuq$egc$1@sea.gmane.org>

Ivan Voras wrote:
> Peter Hansen wrote:
>>Ivan, what makes you say that Python is bad for threads?  Did the 
>>qualifcation "concurrently executing/computing" have some significance 
>>that I missed?
> 
> Because of the GIL (Giant interpreter lock).
> ...
> Much can be said about "at the same time" part, but at least in one case 
> it is unambiguous: in multiprocessor machines. 

Okay, I thought that might be what you were talking about.

I agree that in multiprocessor situations the GIL can be a problem.

I'm equally certain that the GIL is not involved in the OP's problem, 
unless he's running custom extensions that he's produced without any 
awareness of the GIL.

I'm pretty sure that, for the OP's situation, Python threading is 
perfectly fine and the problems he's facing are not inherent, but 
related to the way he is doing things.  I don't see enough information 
in his post to help further though.

-Peter



From dausha at gmail.com  Mon Feb 20 12:04:16 2006
From: dausha at gmail.com (Ben Wilson)
Date: 20 Feb 2006 09:04:16 -0800
Subject: editor for Python on Linux
In-Reply-To: <chlhv15ktc4u3adv34sgk63tok5vl9j50q@4ax.com>
References: <dtai6e$23m$2@ariane.blic.net>
	<chlhv15ktc4u3adv34sgk63tok5vl9j50q@4ax.com>
Message-ID: <1140455056.438018.244770@g14g2000cwa.googlegroups.com>

He said "IDE." That means "vim"



From rtilley at vt.edu  Mon Feb 27 14:59:50 2006
From: rtilley at vt.edu (rtilley)
Date: Mon, 27 Feb 2006 14:59:50 -0500
Subject: different ways to strip strings
In-Reply-To: <440351d4$1_3@newspeer2.tds.net>
References: <dtvgd4$ci7$1@solaris.cc.vt.edu> <440351d4$1_3@newspeer2.tds.net>
Message-ID: <dtvlnu$m91$1@solaris.cc.vt.edu>

Kent Johnson wrote:
> So...
> s.strip() gets a bound method object from the class and calls it with no 
> additional argument.
> str.strip(s) gets an unbound method object from the class and calls it, 
> passing a class instance as the first argument.
> 
> Kent

Thank you Kent. That's a very informative explanation. It makes sense too :)


From joel.hedlund at gmail.com  Sun Feb  5 14:42:07 2006
From: joel.hedlund at gmail.com (Joel Hedlund)
Date: Sun, 05 Feb 2006 19:42:07 GMT
Subject: Best way of finding terminal width/height?
In-Reply-To: <11uc3dohfitotc5@corp.supernews.com>
References: <96nFf.43896$d5.199922@newsb.telia.net>
	<11uc3dohfitotc5@corp.supernews.com>
Message-ID: <jysFf.155352$dP1.513537@newsc.telia.net>

 > Which details?  We'd be happy to explain the code. Not that
 > you need to understand the details to use the code.

OK, why '1234' in here, and what's termios.TIOCGWINSZ, and how should I 
have known this was the way too do it?
fcntl.ioctl(fd, termios.TIOCGWINSZ, '1234')

Am I interpreting C structs here, and if so - why is python giving me C 
structs? And what's 'hh' anyway?
struct.unpack('hh', ... )

Why 0, 1 and 2?
cr = ioctl_GWINSZ(0) or ioctl_GWINSZ(1) or ioctl_GWINSZ(2)

 > I don't know if it will work on MS Windows or not.

Linux and unix are my main concerns, but it would be neat to know if it 
would work on Win/Mac.

What OS:es set the COLS/ROWS env vars? What OS:es can leverage the 
termios module? I have a hunch that we have 100% overlap there, and then 
this solution leaves me at square one (arbitrary choice of 80*25) for 
the others OS:es (or am I wrong?). How do Win/Mac people do this?

 > What's unpythonic about the example you found?

Maybe I did bit of poor wording there, but In my experience python 
generally has a high level of abstraction, which provides linguistically 
appealing (as in "in english") solutions to almost any problem. Like for 
example how os.path.isfile(s) tells me if my string s corresponds to a 
file. I guess that's what I mean really. I sort of expected to find 
something like my terminal_size() example in the built-in modules. I 
didn't expect to have to do that struct fcntl ioctl boogey to solve this 
relatively simple (?) problem.

Thanks for your help!
/Joel


From tim.hochberg at ieee.org  Mon Feb 13 12:49:32 2006
From: tim.hochberg at ieee.org (Tim Hochberg)
Date: Mon, 13 Feb 2006 10:49:32 -0700
Subject: Shortest prime number program
In-Reply-To: <dsmqdj$flg$1@sea.gmane.org>
References: <1139652226.869102.310180@g14g2000cwa.googlegroups.com>	<1139673716.241461.84110@g47g2000cwa.googlegroups.com>	<dsl4ae$l97$1@online.de>	<l042c3-1lb.ln1@prcm.tecont.de>
	<dsmqdj$flg$1@sea.gmane.org>
Message-ID: <dsqgrl$hmt$1@sea.gmane.org>


In the spirit of pointless pessimization and obfuscation I have crushed 
something very similar to Alex Martelli's eratosthenes function onto a 
single line. It's truly monstrous, but somewhat entertaining [Some 
preemptive linebreaks added]:

def short():import itertools as it;D={};g=D.get;return (
q for q in it.count(2) if
D.__setitem__(it.dropwhile(D.__contains__, 
xrange(g(q,q)+q,2**30,g(q,q))).next(),g(q,q))
or q not in D and D.pop(q,1))


I'm sure there's a lesson to this somewhere. Something like I need to 
find something better to do with my spare time.

-tim



From xieyanbo at gmail.com  Tue Feb 14 02:59:38 2006
From: xieyanbo at gmail.com (Xie Yanbo)
Date: Tue, 14 Feb 2006 15:59:38 +0800
Subject: Splitting a string
In-Reply-To: <43F18BA1.8010304@gmail.com>
References: <43F18BA1.8010304@gmail.com>
Message-ID: <fd077d500602132359o78fa0016jd270fe493c6b6e15@mail.gmail.com>

On 2/14/06, Nico Grubert <nicogrubert at gmail.com> wrote:
> Dear Python users,
>
> I'd like to split a string where 'and', 'or', 'and not' occurs.
>
> Example string:
> s = 'Smith, R. OR White OR Blue, T. AND Black AND Red AND NOT Green'
>
> I need to split s in order to get this list:
> ['Smith, R.', 'White', 'Blue, T.', 'Back', 'Red', 'Green']
>
> Any idea, how I can split a string where 'and', 'or', 'and not' occurs?

RE module can do this:
>>> import re
>>> s = 'Smith, R. OR White OR Blue, T. AND Black AND Red AND NOT Green'
>>> r = re.split('(?i)\s*(and\s*not|and|or)\s*', s)
>>> [x[1] for x in enumerate(r) if (x[0]+1) % 2]
['Smith, R.', 'White', 'Blue, T.', 'Black', 'Red', 'Green']

From plahey at alumni.caltech.edu  Fri Feb 24 16:33:11 2006
From: plahey at alumni.caltech.edu (plahey at alumni.caltech.edu)
Date: 24 Feb 2006 13:33:11 -0800
Subject: Regular expression fun. Repeated matching of a group Q
In-Reply-To: <1140794885.460929.223080@i39g2000cwa.googlegroups.com>
References: <1140794885.460929.223080@i39g2000cwa.googlegroups.com>
Message-ID: <1140816791.291012.111420@p10g2000cwp.googlegroups.com>

Doesn't this do what you want?

import re

DATE_TIME_RE =
re.compile(r'<td>((\d{2}\/\d{2}\/\d{4})|(\d{2}:\d{2}))<\/td>')

test = '<td>04/01/2006</td>' \
       '<td>Wednesday</td>'  \
       '<td>&nbsp;</td>'     \
       '<td>09:14</td>'      \
       '<td>12:44</td>'      \
       '<td>12:50</td>'      \
       '<td>17:58</td>'      \
       '<td>&nbsp;</td>'     \
       '<td>&nbsp;</td>'     \
       '<td>&nbsp;</td>'     \
       '<td>&nbsp;</td>'     \
       '<td>08:14</td>'

out = [m[0] for m in DATE_TIME_RE.findall(test)]

for m in out:
    print m



From fredrik at pythonware.com  Mon Feb  6 05:07:32 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 6 Feb 2006 11:07:32 +0100
Subject: Daemon terminates unexpected
References: <43E71DCA.8010307@freiheit.com>
Message-ID: <ds7757$lbp$1@sea.gmane.org>

so does your subject line.

Stefan Neumann wrote:

>    try:
>        main()
>    except Exception,e
>        <write exception>

note that "except Exception" doesn't, in today's Python, catch all
possible exceptions.

>>> class MyException:
...     pass
...
>>> try:
...     raise MyException
... except Exception:
...     print "got it!"
...
Traceback (most recent call last):
  File "<stdin>", line 2, in ?
__main__.MyException: <__main__.MyException instance at 0x00984E18>

try replacing

    except Exception, e:

with

    except:
        e = sys.exc_value()

and see if this helps you find the error.

</F>





From bronger at physik.rwth-aachen.de  Thu Feb 16 09:34:05 2006
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Thu, 16 Feb 2006 15:34:05 +0100
Subject: Installing packages in /usr/local
Message-ID: <874q2zz82q.fsf@wilson.homeunix.com>

Hall?chen!

I use the Suse 10.0 RPM of Python 2.4.  Unfortunately, it doesn't
seem to look for packages in /usr/local because "prefix" and
"exec_prefix" in site.py are the same (namely usr/).

I have my own packages in /usr/local/lib/python/site-packages.  (Due
to easier backup, I don't want to change that.)  What is the best
way to make Python look there?

I tried PYTHONPATH but I had trouble with a Python cron job which
didn't have the proper environment.  I could edit site.py manually,
however, I wonder whether there is a cleaner way?

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus            ICQ 264-296-646


From max at alcyone.com  Sun Feb 19 01:43:28 2006
From: max at alcyone.com (Erik Max Francis)
Date: Sat, 18 Feb 2006 22:43:28 -0800
Subject: aborting without killing the python interpreter
In-Reply-To: <mailman.2116.1140327230.27775.python-list@python.org>
References: <1140320926.993703.90380@o13g2000cwo.googlegroups.com>
	<mailman.2116.1140327230.27775.python-list@python.org>
Message-ID: <prWdnSv6QOcNjmXenZ2dnUVZ_tGdnZ2d@speakeasy.net>

Terry Reedy wrote:

> How?  In the standard interpreter, 'exit' is bound to the string
> 'Use Ctrl-Z plus Return to exit.'
> so trying to call it as a function fails.

I'm _presuming_ there was a hidden `from sys import *` in there.  Hence 
calling exit with the string (the help for sys.exit shows that if a 
string is passed in, it will be printed before the process exits with 
failure -- something I wasn't aware of actually).

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
   God heals, and the doctor takes the fee.
   -- Benjamin Franklin


From webraviteja at gmail.com  Sun Feb  5 09:21:46 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 5 Feb 2006 06:21:46 -0800
Subject: Compiling
In-Reply-To: <43e3972f$0$624$626a14ce@news.free.fr>
References: <mailman.1387.1138986082.27775.python-list@python.org>
	<43e392d1$0$31853$626a54ce@news.free.fr>
	<mailman.1390.1138988111.27775.python-list@python.org>
	<43e3972f$0$624$626a14ce@news.free.fr>
Message-ID: <1139149306.188367.193770@g47g2000cwa.googlegroups.com>

>> For short : this was kind of a joke... I understand that what you were
looking for is a 'native code' compiler. AFAIK, this could of course be
done, but due to Python's very dynamic nature, it's not sure this would
lead to drastically better performances.

This is a standard response to a rather frequent question here. But I
am not sure I ever understood. Scheme / Lisp are about as dynamic as
Python. Yet they have quite efficient native compilers. Ex: Bigloo
Scheme.

Another standard response is "nobody felt the need or got around to
it". And yet a number of Lisp and Scheme compilers exist when these
languages have a much smaller user base. Am I missing something here?



From anothermoi at sbcglobal.net  Fri Feb 17 18:56:48 2006
From: anothermoi at sbcglobal.net (Lou G)
Date: 17 Feb 2006 15:56:48 -0800
Subject: Checkbuttons in a Text widget
In-Reply-To: <1140190108.192983.287630@g14g2000cwa.googlegroups.com>
References: <1140190108.192983.287630@g14g2000cwa.googlegroups.com>
Message-ID: <1140220608.901832.100210@g44g2000cwa.googlegroups.com>

For anyone who might be able to use this technique:
I kept playing around and got it to work:

for i in nameList:
    btnText = name[i]
    self.sv = []
    cb = []
    cb.append(Checkbutton(self.datalist, text=btnText,
        variable=self.sv[i], background='white', font=("Courier", 10)))
    self.datalist.window_create(INSERT, window=cb[i])
    self.datalist.insert(END, '\n') 

Thank you for your replies,
Lou



From steve at REMOVETHIScyber.com.au  Fri Feb  3 06:04:13 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 03 Feb 2006 22:04:13 +1100
Subject: newbie - script works in PythonWin - fails from Python
References: <1138960717.927268.22640@g44g2000cwa.googlegroups.com>
	<1138961665.684357.78060@g44g2000cwa.googlegroups.com>
	<1138962543.290178.77790@g47g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.03.11.04.13.213569@REMOVETHIScyber.com.au>

On Fri, 03 Feb 2006 02:29:03 -0800, marcus.tettmar wrote:

> I'm using ctypes and loading a DLL and running a DLL function.  As I
> say it works perfectly with no errors when I run from PythonWin but
> gives the following exception when run from command line.
> 
> WindowsError: exception code 0xeedfade

I find it hard to believe that this is the entire exception traceback.
This is what a traceback looks like:


>>> dosomething wrong(20)  # oops, space in the function name
  File "<stdin>", line 1
    dosomething wrong(20)
                    ^
SyntaxError: invalid syntax

See how much information is given by the traceback? If I just posted
"SyntaxError: invalid syntax" to the newsgroup with no further
information, what do you think the chances are anyone would guess the
cause of the problem?

So, how about trying again with the complete traceback?


-- 
Steven.



From davecook at nowhere.net  Mon Feb  6 07:30:31 2006
From: davecook at nowhere.net (Dave Cook)
Date: Mon, 06 Feb 2006 12:30:31 GMT
Subject: Python, GUI, and GTK+
References: <mailman.1457.1139179252.27775.python-list@python.org>
Message-ID: <slrnduegau.oja.davecook@localhost.localdomain>

On 2006-02-05, Piotr Husiatynski <husio at o2.pl> wrote:

> I'm new at GUI programming. I've heard about Gazpacho but I couldn't find
>  any tutorial about it on Internet (even on the gazpacho page). Becouse of
> that fact, I've installed Glaze, but there's probably no tutorials for
> python too.
> Can anyone point me an introdutory tutorial on how to implement a very
> simple application in GTK+ based on a XML file?

Gazpacho tries to follow Glade closely, but adds some things like support
for actions and kiwi widgets.  So look for tutorials on Glade, and then read
up on actions.  Then what Gazpacho is trying to do should be more clear.

You should be able find everything you need at pygtk.org in the righthand
sidebar.

Dave Cook


From steve at holdenweb.com  Sun Feb 12 23:07:52 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 12 Feb 2006 23:07:52 -0500
Subject: Newbie
In-Reply-To: <HZJHf.2737$lo3.1139@trnddc07>
References: <v3JHf.2731$lo3.2501@trnddc07>	<43ef6433$0$25387$636a55ce@news.free.fr>
	<HZJHf.2737$lo3.1139@trnddc07>
Message-ID: <dsp0ml$cpd$2@sea.gmane.org>

LittlePython wrote:
> I am very new to python. I have been studying it for only a month or so. I
> have been using vbscript for about 2-3 yrs and only recently been using it
> rather heavily the past 9 months or so. I am new very new to oop. My main
> use will be administrative scripting into the win3k, XP, AD domain,
> 55exchange and 2003exchange environments. I like to incorp wxpython (GUI)
> into my scripts instead of HTA's that I have been using with VBS. I am also
> finding myself being tasked with jobs that are outside the scope of VBS.
> Well that's a lot to learn and I have a feeling that to many I am just
> another member of  "The Ministry of STUPID Questions"
> 
Realizing that you are potentially asking dumb questions, lus the fact 
that you've been playing with Python for a month already, puts you way 
ahead of the game. Ask away, and welcome to comp.lang.python.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From ajsiegel at optonline.com  Tue Feb  7 08:45:00 2006
From: ajsiegel at optonline.com (Arthur)
Date: Tue, 07 Feb 2006 08:45:00 -0500
Subject: Question about idioms for clearing a list
In-Reply-To: <43E8A035.7010709@optonline.com>
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>
	<43E8A035.7010709@optonline.com>
Message-ID: <43E8A45C.7060503@optonline.com>

Arthur wrote:
> 
> My ability to grok Python to any extent, from that starting point, was 
> based on an understanding that it was my responsibility to come to 
> Python, not it to me. And concerted, almost obsessive effort, And time.
> 
> OTOH - because of exactly these factors - I have actively resented and 
> resisted promulgation of the Python is Easy meme.
> 
> Pity that this stance has separated me from a sense of belonging to the 
> community, which seems to so highly value that meme.

What Python *is*, to me, is a game worth playing.  Not something I come 
across all that often.  And easy games, almost invariably, are not.

Art


From steve at holdenweb.com  Mon Feb 13 07:54:26 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 13 Feb 2006 07:54:26 -0500
Subject: how do you pronounce 'tuple'?
In-Reply-To: <uhk0v1tr5fsjnrtttuuaim8g8po4k6td8g@4ax.com>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>	<mailman.1806.1139805039.27775.python-list@python.org>
	<uhk0v1tr5fsjnrtttuuaim8g8po4k6td8g@4ax.com>
Message-ID: <dspvi0$83b$1@sea.gmane.org>

Dennis Lee Bieber wrote:
> On Sun, 12 Feb 2006 23:30:25 -0500, Steve Holden <steve at holdenweb.com>
> declaimed the following in comp.lang.python:
> 
> 
> 
>>I teach on both sides of the Atlantic, and have learned to draw a mental 
>>breath before trying to pronounce the word "router". Americans find the 
>>British pronunciation ("rooter") hilarious, despite the fact they tell 
>>me I drive on "Root 66" to get to DC. The Brits are politer, and only 
>>snigger behind my back when I pronounce it as Americans do, to rhyme 
>>with "outer".
>>
> 
> 	Strange... I never knew Route 66 got that far east... As I recall,
> it runs (ran) from ~Los Angeles across the southwest before making an
> upward turn through Missouri (where it passed just outside of Ft.
> Leonard Wood) and there from meandered through St. Louis and up toward
> Chicago... 
> 
The Route 66 that runs past Manassas and into DC appears to be a 
completely different Interstate from the one made famous by the Chuck 
Berry song, and I was really confused by it when I moved to the DC Metro 
area.

> 	Then again, from the "new world" perspective... A "route" is a fixed
> path between points... A "router" is something that dynamically
> determines paths -- so it may be seen as a different derivation...
> 
> {Or as I learned on my previous department: A pub's a bar, a bar's a
> gate, a gate's a street}
> 
:-)

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From dananrg at yahoo.com  Tue Feb 28 11:57:10 2006
From: dananrg at yahoo.com (dananrg at yahoo.com)
Date: 28 Feb 2006 08:57:10 -0800
Subject: Best python module for Oracle, but portable to other RDBMSes
In-Reply-To: <43ff852a$0$11074$636a55ce@news.free.fr>
References: <1140818561.458171.237850@p10g2000cwp.googlegroups.com>
	<43ff852a$0$11074$636a55ce@news.free.fr>
Message-ID: <1141145830.170150.69770@z34g2000cwc.googlegroups.com>

Also, what's the difference between something like cx_oracle and an
ODBC module? If I were to use an ODBC module (not trying to torture
myself here, I promise, but I just want to see what alternatives exist
and how they work).



From david.christian at gmail.com  Wed Feb 15 11:45:19 2006
From: david.christian at gmail.com (David Christian)
Date: Wed, 15 Feb 2006 11:45:19 -0500
Subject: How to tell the parent frame is a C module? (Lazy importing)
Message-ID: <63940b00602150845l13406404ga8d5a511dd9f37@mail.gmail.com>

Hello all,
I've been working on a lazy import module to be found here:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/473888

The basic idea is that a module proxy for foo is returned from an
'import foo' statement.  When an attribute of foo is accessed, or
dir(foo) is called, or a from foo import * is done, the module is
actually loaded, and the module proxy is replaced in the calling
frame.  This relies on the proxy being able to intercept __getattr__,
etc from the module and behaving appropriately.

This seems to work very well except in the case where the importing
module is a C module.

When getting the attributes of a class in C, python does the following check:

if (!PyModule_Check(m)) {
      PyErr_BadInternalCall();
                    return NULL;
}
d = ((PyModuleObject *)m) -> md_dict;

Which does an end-run around all of my module-related evilness.

I'm hoping that there is some way to somehow detect when the import
statement is being called from a C module, and in that case just load
the module normally.  But I can't figure out any way to detect that
from python.  In fact, in sys.frame it looks like any C modules are
simply skipped over.  I could try to detect that an intermdiate frame
is missing, I suppose....

Any pointers?
Dave


From jaywgraves at gmail.com  Fri Feb  3 17:26:08 2006
From: jaywgraves at gmail.com (jay graves)
Date: 3 Feb 2006 14:26:08 -0800
Subject: Launch Windows command window....
References: <1139003975.837861.141680@o13g2000cwo.googlegroups.com>
	<1139004370.221885.190540@f14g2000cwb.googlegroups.com>
Message-ID: <1139005568.749960.261980@g44g2000cwa.googlegroups.com>

Ernesto wrote:
> subprocess.Popen("telnet.exe -f C:\Folder\output.txt localhost 6000")
> is improved, but still doesn't launch a SEPERATE window...

This should work but only lightly tested.
subprocess.Popen("start telnet.exe -f C:\Folder\output.txt localhost
6000",shell=True)

You don't say what you are trying to do but if you are trying to drive
telnet maybe you want the pexpect module.
http://pexpect.sourceforge.net/

I've never had the need to use it myself so I can't offer any other
advice.  

...
jay graves



From w.damen at gmail.com  Thu Feb  9 03:06:05 2006
From: w.damen at gmail.com (Rinzwind)
Date: 9 Feb 2006 00:06:05 -0800
Subject: how to remove <BR> using replace function?
In-Reply-To: <1139469846.713121.219060@g47g2000cwa.googlegroups.com>
References: <1139462640.951603.302830@g44g2000cwa.googlegroups.com>
	<1139464079.635612.289930@o13g2000cwo.googlegroups.com>
	<1139465695.997171.159150@g44g2000cwa.googlegroups.com>
	<1139469846.713121.219060@g47g2000cwa.googlegroups.com>
Message-ID: <1139472365.378523.141150@g44g2000cwa.googlegroups.com>

Works for me.

>>> txt = "an unfortunate <br> in the middle"
>>> print txt.replace("<br>", "")
an unfortunate  in the middle
>>> 


Though I don't like the 2 spaces it gives ;)



From paul at boddie.org.uk  Sun Feb 19 18:16:24 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 19 Feb 2006 15:16:24 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<1140382936.808627.40300@o13g2000cwo.googlegroups.com>
	<pan.2006.02.19.22.27.59.152474@REMOVETHIScyber.com.au>
Message-ID: <1140390984.191650.320460@g44g2000cwa.googlegroups.com>

Steven D'Aprano wrote:
> On Sun, 19 Feb 2006 13:02:16 -0800, Paul Boddie wrote:
>
> >> Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> writes:
> >> >
> >> > Ok, then what do you think happens to 'machine' code ?
> >> >
> >> > "interpreted" usually means "no compilation, all parsing etc
> >> > redone at each execution", which is not the case with a
> >> > bytecode/vm based implementation.
> >
> > Such criteria sound more like those which would distinguish interactive
> > languages from others.
>
> How can that be? Python is interactive, and yet it has a bytecode/vm
> implementation.

The criteria were "no compilation, all parsing etc redone at each
execution": things which would possibly describe features of a language
where much use is made of an interactive mode, and where there wouldn't
be many advantages in generating instructions in another form for later
execution. Not that this applies to Python, since it does compile
source code to bytecode instructions as we all know, and the only
re-parsing occurs in well-defined circumstances, but there have been
other "dare I say scripting?" languages whose execution models have
apparently involved ASTs instead of virtual machine instruction sets.

[...]

> > And it's even better to think about the nature of the machine...
>
> Is it? Why? Do you particularly know what happens when your machine code
> hits the CPU?

In general, yes: it's interpreted by a virtual machine implementation
in hardware. But this is where the nature of the machine is important,
as I originally wrote, since you don't want highly complicated
instructions implemented in hardware for a variety of well-understood
reasons.

[...]

> Let's be frank: "interpreted language" has negative connotations which may
> have been valid in the 1960s and perhaps even the 1970s, but are no longer
> automatically valid. Nevertheless, those connotations stick around,
> generally amongst the less knowledgeable. That hurts Python's commercial
> success, and Python's commercial success is vital for anyone who wishes to
> get paid to program in Python.

I think we're mostly in agreement here. My point was, as usual,
tangential: there is a certain class of instructions conveniently or
economically implementable in hardware; CPython's runtime also has
instructions more complicated than those. Consequently, when people
used to speculate about Python CPUs and other magical devices that
would make Python run much faster (see [1] for more recent material
which doesn't specifically do so, although I believe the speaker made
references to such devices; see [2] for an old mailing list thread),
one has to accept that there are certain constraints that have a severe
effect on whether such devices are viable or not. If some people want
to classify runtime environments on this basis then I don't have a
problem with that, provided that they are honest about it and put
things like the Java VM in the same category as CPython.

Paul

[1]
http://www.python-in-business.org/ep2005/talk.chtml?talk=2116&track=692
[2]
http://mail.python.org/pipermail/python-list/1999-June/thread.html#4543



From newptcai at gmail.com  Tue Feb 21 10:10:48 2006
From: newptcai at gmail.com (Peter Cai)
Date: Tue, 21 Feb 2006 23:10:48 +0800
Subject: popen2() does not work correctly on windows!
Message-ID: <befee6d80602210710x52d7217j2d3c17382fc3df22@mail.gmail.com>

I want to catch the output of a program but I can not use redirect because
it's interactive and thus I need to see the output on the screen.

So I use popen2() to execute it and then both print the output on the screen
and in a log file.
But when I want to write something command to it, it seems that the program
can not get it.

I'm working on windows XP

--
????? ???????
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20060221/8d6f88f9/attachment.html>

From nummertolv at gmail.com  Mon Feb 27 03:57:06 2006
From: nummertolv at gmail.com (nummertolv)
Date: 27 Feb 2006 00:57:06 -0800
Subject: Using repr() with escape sequences
In-Reply-To: <amvrv1961jov24no499kr5sbhqebksm50b@4ax.com>
References: <1140708756.484933.13390@z14g2000cwz.googlegroups.com>
	<pan.2006.02.23.15.53.28.462638@REMOVETHIScyber.com.au>
	<1140713377.854836.282810@z14g2000cwz.googlegroups.com>
	<amvrv1961jov24no499kr5sbhqebksm50b@4ax.com>
Message-ID: <1141030626.728715.70600@v46g2000cwv.googlegroups.com>

myString = "bar\foo\12foobar"
print repr(myString)

My "problem" was that I wanted to know if there is a way of printing
"unraw" strings like myString so that the escape characters are written
like a backslash and a letter or number. My understanding was that
repr() did this and it does in most cases (\n and \t for instance). In
the cases of \a,\b,\f and \v however, it prints hexadecimal numbers.
But I guess I'll just have to live with that and as you point out, it
doesn't have to be a problem anyway.



From fredrik at pythonware.com  Tue Feb  7 06:36:22 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 7 Feb 2006 12:36:22 +0100
Subject: get list of files
References: <1139311759.603645.13790@f14g2000cwb.googlegroups.com>
Message-ID: <dsa0np$f4p$1@sea.gmane.org>

"eels" wrote:

> I want to get a listing of my files at web server with ftp. I wantn 't
> download the files.
> With yyy = ftp.retrlines('LIST') I get this listing at stdout, but I
> need this information at variable yyy.
> How can I resolve this problem?

as mentioned in the documentation, you need to provide a callback if
you want to collect the data from a retr operation.

   yyy = []
   ftp.retrlines("LIST", yyy.append)

should do the trick.

(also see the dir and nlst methods)

</F>





From mlist at fastwebnet.it  Tue Feb  7 08:29:03 2006
From: mlist at fastwebnet.it (billie)
Date: Tue, 7 Feb 2006 14:29:03 +0100
Subject: Using RAW_SOCKETS on win XP SP2
Message-ID: <sg1Gf.72644$av6.48103@tornado.fastwebnet.it>

Hi all. I'd need to send a TCP SYN packet having a certain string as 
payload. I'm
using Python and an high level packet building library called "Impacket" to
build TCP and IP datagrams. I wrote this simple code that works on Linux but 
not on Windows XP SP2, probably because of SP2 security limitations. Do you 
got any idea about how could I solve this problem?
I found an article of Fyodor (author of nmap port scanner) about how to
solve this kind of SP2 limitations:
http://seclists.org/lists/nmap-hackers/2004/Jul-Sep/0003.html
...that says:

> "Instead of sending raw IP packets, we move one layer down and send our
> raw IP packets in raw ethernet frames."

Do you got any idea about how could I implement a stuff like this?

Best regards.


from impacket import ImpactPacket
from socket import *

src = '10.0.0.1'
dst = '10.0.0.25'

s = socket(AF_INET, SOCK_RAW, IPPROTO_TCP)
s.setsockopt(IPPROTO_IP, IP_HDRINCL, 1)

ip = ImpactPacket.IP()
ip.set_ip_src(src)
ip.set_ip_dst(dst)

tcp = ImpactPacket.TCP()
tcp.set_SYN()
tcp.set_th_sport(43749)
tcp.set_th_dport(1000)
tcp.contains(ImpactPacket.Data('hello there'))

ip.contains(tcp)

s.sendto(ip.get_packet(), (dst, 0))


++++++++++  ERROR ++++++++++

    s.sendto(ip.get_packet(), (dst, 0))
socket.error: (10022, 'Invalid argument')





From eric.nieuwland at xs4all.nl  Mon Feb 27 10:43:04 2006
From: eric.nieuwland at xs4all.nl (Eric Nieuwland)
Date: Mon, 27 Feb 2006 16:43:04 +0100
Subject: PEP 354: Enumerations in Python
In-Reply-To: <4402C2A4.1030902@tim.thechases.com>
References: <87accdplbj.fsf@rose.polar.local>
	<4402B91A.4010108@tim.thechases.com>
	<4402C2A4.1030902@tim.thechases.com>
Message-ID: <c7e7eae042f7b5347b6584df486c585f@xs4all.nl>

On 27 feb 2006, at 10:13, Tim Chase wrote:

>> Uniqueness imposes an odd constraint that you can't have
>> synonyms in the set:
>>
>>>>> shades = enum({white:100, grey:50, gray:50, black:0})
>
> Blast, I hate responding to my own posts, but as soon as I
> hit Send, I noticed the syntax here was biffed.  Should have
> been something like
>
>>>> shades = enum(("white", 100), ("grey", 50),
> ("gray",50), ("black", 50))
>
> Same could go for days of the week:
>
>>>> dow=enum(("sunday", 0), ("monday", 1),
> ("start_of_work_week", 1), ... ("friday", 5),
> ("end_of_work_week", 5)...)

if enum would handle a dict as an input parameter by replacing it with 
the dict's iteritems() this is equivalent.

--eric



From claudio.grondi at freenet.de  Thu Feb 23 19:26:14 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Fri, 24 Feb 2006 01:26:14 +0100
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <mailman.2376.1140733288.27775.python-list@python.org>
References: <dtl9ad$35h$1@sea.gmane.org> <dtlat7$80c$1@sea.gmane.org>
	<mailman.2376.1140733288.27775.python-list@python.org>
Message-ID: <dtljre$f8i$1@newsreader3.netcologne.de>

Paul Probert wrote:
> Peter Hansen wrote:
> 
>> Are you saying that you believe the time.sleep(1) call is actually 
>> blocking for 200 seconds?  Or just that your loop (and we can only 
>> guess what it looks like) is the one taking that long?
>>
>> If the former, try something like putting "print 'before'" and "print 
>> 'after'" before and after the sleep, and observe what happens when you 
>> run the program.  I'm fairly confident in saying there's no chance 
>> you'll see the "before" sit for 200s before you see the "after" and 
>> that your problem lies elsewhere, not with time.sleep(1).
>>
>> If the latter, um, obviously we can't help without more info.
>>
>> -Peter
>>
>>  
>>
> Yes, I'm doing this:
>           .....
>          oldtime=time.time()
>          time.sleep(1)
>          newtime=time.time()
>          dt=newtime-oldtime
>           if dt > 2:
>               print 'dt=',dt,' time=',time.strftime('%Y_%m_%d_%Hh_%Mm_%Ss')
> Its happening roughly 4 times a day total on our 20 machines, ie about 
> once every 5 days on a given machine.
> 
> Paul Probert
> University of Wisconsin
> 
With such rare occurrence it is very hard to tell what is going on. 
Usually I put such strange things on a list of curiosities I don't want 
to know the reason of, because it is in my eyes not worth the effort. 
Maybe it is even a common problem not yet detected by me, because I have 
never run this kind of tests for such a long time.
Starting today, I can tell you statistically not earlier than in one 
week, if I have the same problem on my machines (currently I am running 
only one or two at the same time).

In between let's try to use some logic:
If the machine and the operating system are not the cause, what have all 
these machines in common?
  1. The software they are running (kind of not often triggered bug)
  2. The network cards used (bug in hardware or drivers)
  3. Another piece of hardware common to all the machines
  3. The harddisks (recalibration)
  4. The network router/switch and/or the server.

Claudio


From jm.suresh at gmail.com  Thu Feb 16 00:02:29 2006
From: jm.suresh at gmail.com (Suresh Jeevanandam)
Date: Thu, 16 Feb 2006 10:32:29 +0530
Subject: mapping functions and lambda
Message-ID: <dt1118$t2n$1@home.itg.ti.com>

Given a string
s = 'a=1,b=2'

I want to create a dictionary {'a': '1', 'b': '2'}

I did,

dict(map(lambda k: k.split('='), s.split(',')))

Is it possible to get rid of the lambda here, without having to define 
another function just for this.

Is this the easiest/straight-forward way to do this?

regards,
Suresh


From cjw at sympatico.ca  Fri Feb 10 09:34:31 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Fri, 10 Feb 2006 09:34:31 -0500
Subject: What editor shall I use?
In-Reply-To: <dsg966$hpc$1@online.de>
References: <1139410110.389122.215400@z14g2000cwz.googlegroups.com>
	<dsg966$hpc$1@online.de>
Message-ID: <43ECA477.2080200@sympatico.ca>

Peter Maas wrote:
> Lad schrieb:
> 
>> What editor shall I use if my Python script must contain utf-8
>> characters?
>> I use XP
> 
> 
> An extremely capable, easy to use and small editor is Neil
> Hodgson's SciTE. It's my favorite editor on Windows and Linux.
> There is a Windows installer at
> 
> http://users.hfx.eastlink.ca/~gisdev/scite-1.67-setup-3.exe
> 
> Peter Maas, Aachen
Yes, Scite is an excellent editor for Windows or Linux, but PyScripter
[http://mmm-experts.com/Products.aspx?ProductID=4]
offers more, including call completion and call tips.

It's true that call completion is advertised with SciTE but I have
not been able to use it with Windows.

Colin W.


From uche.ogbuji at gmail.com  Sat Feb 11 13:44:48 2006
From: uche.ogbuji at gmail.com (uche.ogbuji at gmail.com)
Date: 11 Feb 2006 10:44:48 -0800
Subject: only a simple xml reader <tag:id>value</tag:id>
In-Reply-To: <1139409929.944215.203740@z14g2000cwz.googlegroups.com>
References: <1139387993.478950.76410@g44g2000cwa.googlegroups.com>
	<1139409218.480843.317570@g43g2000cwa.googlegroups.com>
	<1139409929.944215.203740@z14g2000cwz.googlegroups.com>
Message-ID: <1139683488.253351.3510@g44g2000cwa.googlegroups.com>

martijn at gamecreators.nl wrote:
> The only thing I must read is the response I get from a EPP server.
> A response like this:
>
> <?xml version="1.0" encoding="UTF-8"?>
> <epp xmlns=" http://www.eurid.eu/xml/epp/epp-1.0"
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xmlns:contact="http://www.eurid.eu/xml/epp/contact-1.0"
> xmlns:domain="http://www.eurid.eu/xml/epp/domain-1.0"
> xmlns:eurid="http://www.eurid.eu/xml/epp/eurid-1.0"
> xmlns:nsgroup="http://www.eurid.eu/xml/epp/nsgroup-1.0"
> xsi:schemaLocation="http://www.eurid.eu/xml/epp/epp-1.0 epp-1.0.xsd
> http://www.eurid.eu/xml/epp/contact-1.0 contact-1.0.xsd
> http://www.eurid.eu/xml/epp/domain-1.0 domain-1.0.xsd
> http://www.eurid.eu/xml/epp/eurid-1.0 eurid-1.0.xsd
> http://www.eurid.eu/xml/epp/nsgroup-1.0 nsgroup-1.0.xsd">
> <response>
> <result code="1500">
> <msg>Command completed successfully; ending session</msg>
> </result>
> <resData>
> <domain:appData>
> <domain:name>c-and-a.eu</domain:name>
> <domain:reference> c-and-a_1</domain:reference>
> <domain:code>2565100006029999</domain:code>
> <domain:crDate>2005-11-08T14:51:08.929Z</domain:crDate>
> </domain:appData>
> </resData>
> <!-- SNIP -->
> </response>
> </epp>

So to get the msg, you can do:

print doc.getElementsByTagName('msg')[0].toxml()

But to get the domain:name you have to use the declared namespace:

print
doc.getElementsByTagNameNS('http://www.eurid.eu/xml/epp/domain-1.0',
'name')[0].toxml()

Or you can make life a bit easier with Amara [1]:

import amara
doc = amara.parse(theXML)
print doc.response.result.msg #to get the text content
print doc.response.result.msg.xml() #to get the XML source for that
element
print doc.response.resData.appData.name
print doc.response.resData.appData.name.xml()

[1] http://uche.ogbuji.net/tech/4Suite/amara/

--
Uche Ogbuji                               Fourthought, Inc.
http://uche.ogbuji.net                    http://fourthought.com
http://copia.ogbuji.net                   http://4Suite.org
Articles: http://uche.ogbuji.net/tech/publications/



From kylotan at gmail.com  Mon Feb 27 05:33:08 2006
From: kylotan at gmail.com (Ben Sizer)
Date: 27 Feb 2006 02:33:08 -0800
Subject: Reading from socket file handle took too long
In-Reply-To: <mailman.2413.1140817380.27775.python-list@python.org>
References: <mailman.2413.1140817380.27775.python-list@python.org>
Message-ID: <1141036388.129379.79120@i39g2000cwa.googlegroups.com>

Etienne Desautels wrote:
> Everything works well but one thing. My problem is that running
> nextFrame() took, most of the time, more then 0,0414 sec. so my video
> is lagging. I monitor every call and I found that the culprit is when I
> read from the socket file handle. It's the only bottleneck in my code.

If you're sure this is the problem, you might try calling setSockOpt on
the socket to set the nodelay flag, something like this:

mySocket.setsockopt(IPPROTO_TCP, TCP_NODELAY, 1)

I don't know enough about the option to be sure it'll work, but it
can't hurt to try.

-- 
Ben Sizer



From claird at lairds.us  Sun Feb 12 12:08:02 2006
From: claird at lairds.us (Cameron Laird)
Date: Sun, 12 Feb 2006 17:08:02 GMT
Subject: Is Forth for real?
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
	<1139754010.067582.214830@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>
Message-ID: <1v44c3-geo.ln1@lairds.us>

In article <pan.2006.02.12.15.11.04.739314 at REMOVETHIScyber.com.au>,
Steven D'Aprano  <steve at REMOVETHIScyber.com.au> wrote:
			.
			.
			.
>on the web for each language. By comparison, even Forth gives 13 million
>plus hits, and who uses Forth?
			.
			.
			.
The programmers of, among other things, the FedEx bar-code reader,
the Sun boot loader, and parts of the Space Shuttle.


From tim at pollenation.net  Tue Feb 21 13:28:19 2006
From: tim at pollenation.net (Tim Parkin)
Date: Tue, 21 Feb 2006 18:28:19 +0000
Subject: Zope/Plone - Is it the right solution?
In-Reply-To: <dtfan0$fsi$1@sea.gmane.org>
References: <1140532818.195281.316580@g44g2000cwa.googlegroups.com>
	<dtfan0$fsi$1@sea.gmane.org>
Message-ID: <43FB5BC3.9080305@pollenation.net>

Fredrik Lundh wrote:
> "kbperry" wrote:
>>I am currently a student, and for our HCI class project we are
>>redeveloping our CS website.  I attend a very large university (around
>>30,000 students), and the CS site will need to be updated by many
>>people that don't have technical skills (like clerical staff).
>>
>>The biggest problem with the current site is that not enough people
>>have access to update it.  Since I love python, these seemed like
>>viable solutions.
>>
>>1)  Is Zope/Plone overkill for this type of project?
>>
>>2)  Why use Plone vs. straight up Zope?
>>
>>3)  Is there a way to get over the steep learning curves (that I have
>>read about)?
> 
> do you want to build a web application, use a ready-made CMS, or is the goal to
> easily get lots of information on to the (intra)web ?
> 
> if the latter, a modern wiki with good access control could be worth investigating:
> 
>     http://moinmoin.wikiwikiweb.de/
>     http://moinmoin.wikiwikiweb.de/HelpOnAccessControlLists
> 
> (for performance, you may want to run the wiki behind mod_proxy)
> 
> if you want a ready-made content management system, pick Plone.

I'd heartily agree with Fredrik on this.. If you just want to manage a
set of interlinked documents (i.e. content oriented web pages) then a
wiki will get you going and contributors updating stuff faster than
pretty much anything going.

Plone will give you more structure (allow you to create your own types
of conten or object e.g. courses, buildings, whatever) with more effort
and more maintenance.

Rolling your own with any framework out there will inevitably give you
the most flexibility (you can do pretty much what you want) traded off
against a lot larger investment in time at the start and ongoing.

If you want it to be a project, there isn't much to get your teeth into
in creating a wiki based site (you can write you own modules and
plug-ins I suppose). Plone/Zope3 would challenge you more and you'd have
a chance to learn some different approaches to common cs problems.

If I were to recommend based on you wanting a project, I'd say zope3. If
it's based on getting some content up and editable quickly then I'd say
wiki. If you're aiming for a structured website to handle some of the
typical course info (handling events, rooms, dates, etc) I'd recommend
plone.

Tim Parkin

p.s. The steep learning curve should only be if you want to do something
to 'extend' the plone/zope system. As long as you are happy with the
defaults for common components you shouldn't have too much to learn.


From gregtech at wp.pl  Sun Feb 26 19:24:56 2006
From: gregtech at wp.pl (Grzegorz Smith)
Date: Mon, 27 Feb 2006 01:24:56 +0100
Subject: how to write file with cp1250 encodings?
Message-ID: <1naixxfnequd.pr3wbg48tvap$.dlg@40tude.net>

Hi all. I have got situation: i load data from database(MSSQL) wchich are
encoded cp1250 and I fill template with that data (Cheetah Template), after
all i want to save template to file on disk. I'm using 
newfile = open("template.html",w")
newfile.write(str(template))
newfile.close()
But data encodings are saved wrong, and I try diffrent programs to convert
but all i get was only mess. So is this any way to save data with encodings
cp1250 properly? 
Any help will be very appreciated
Gregor


From richard at pyweek.org  Fri Feb 24 16:59:52 2006
From: richard at pyweek.org (richard at pyweek.org)
Date: Sat, 25 Feb 2006 08:59:52 +1100
Subject: PyWeek Python Game Programming Challenge, The Second!
Message-ID: <200602250859.52563.richard@pyweek.org>

The date for the second PyWeek challenge has been set: Sunday 26th March
to Sunday 2nd April (00:00UTC to 00:00UTC). 

The PyWeek challenge invites entrants to write a game in one week from
scratch either as an individual or in a team. Entries must be developed
in Python, during the challenge, and must incorporate some theme chosen
at the start of the challenge.


REGISTRATION IS NOW OPEN --

To register for the challenge, visit:

   http://www.pyweek.org/

Some of the challenge website isn't finished yet. I hope to have it completed 
in the next week. This includes management of team entries.


PLANNING FOR THE CHALLENGE --

Make sure you have working versions of the libraries you're going to use.
The rules page has a list of libraries and other resources.

Make sure you can build packages to submit as your final submission (if
you're going to use py2exe, make sure you know how to use it and that it
works).

If you don't have access to Linux, Windows or a Mac to test on, contact
friends, family or other competitors to find someone who is able to test
for you.


-- 
Visit the PyWeek website:
  http://www.pyweek.org/


From tzellman at gmail.com  Wed Feb 15 12:01:38 2006
From: tzellman at gmail.com (tzellman at gmail.com)
Date: 15 Feb 2006 09:01:38 -0800
Subject: kwargs keyword evaluation
In-Reply-To: <mailman.1959.1140022265.27775.python-list@python.org>
References: <1140021611.026892.85790@f14g2000cwb.googlegroups.com>
	<mailman.1959.1140022265.27775.python-list@python.org>
Message-ID: <1140022499.420420.123190@g43g2000cwa.googlegroups.com>

Thanks. That also worked. I will use that, since apply() is deprecated
as of 2.3.

Thanks!
-Tom



From onurb at xiludom.gro  Thu Feb 16 04:41:47 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Thu, 16 Feb 2006 10:41:47 +0100
Subject: multi/double dispatch, multifunctions once again
In-Reply-To: <rZOdnZHeI6eGW27eRVn-gg@comcast.com>
References: <rZOdnZHeI6eGW27eRVn-gg@comcast.com>
Message-ID: <43f448f9$0$3811$626a54ce@news.free.fr>

AndyL wrote:
> Hi,
(OT : please repeat the question in the body of the post...)

> Where I can find a module supporting that?

http://peak.telecommunity.com/DevCenter/PyConGenericFunctions

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From fredrik at pythonware.com  Tue Feb 14 07:40:05 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 14 Feb 2006 13:40:05 +0100
Subject: Unexpected behaviour of getattr(obj, __dict__)
References: <pan.2006.02.14.11.36.28.723688@REMOVETHIScyber.com.au><43f1c722$0$17400$626a54ce@news.free.fr>
	<pan.2006.02.14.12.18.07.897108@REMOVETHIScyber.com.au>
Message-ID: <dssj37$iu5$1@sea.gmane.org>

Steven D'Aprano wrote:

> >>>>>class Parrot(object):
> >>
> >> ...     thing = [1,2,3]
> >> ...
> >>
> >>>>>getattr(Parrot, "thing") is Parrot.thing
> >>
> >> True
> >>
> >>>>>getattr(Parrot, "__dict__") is Parrot.__dict__
> >>
> >> False
> >
> >
> > hint:
> >>>> getattr(object, '__dict__')
> > <dictproxy object at 0x2aaaaab2ff30>
>
> That doesn't answer the question, it just re-words it. Why is the
> dictproxy returned by getattr a different instance from the dictproxy
> that you get when you say object.__dict__?

because it's created on the fly:

>>> Parrot.__dict__
<dictproxy object at 0x009818B0>
>>> Parrot.__dict__
<dictproxy object at 0x00981A10>
>>> Parrot.__dict__
<dictproxy object at 0x009818B0>
>>> Parrot.__dict__
<dictproxy object at 0x00981A10>
>>> Parrot.__dict__
<dictproxy object at 0x009818B0>
>>> Parrot.__dict__
<dictproxy object at 0x00981A10>
>>> Parrot.__dict__
<dictproxy object at 0x009818B0>
>>> Parrot.__dict__
<dictproxy object at 0x00981A10>
>>> Parrot.__dict__
<dictproxy object at 0x009818B0>
>>> Parrot.__dict__
<dictproxy object at 0x00981A10>
>>> Parrot.__dict__
<dictproxy object at 0x009818B0>

the object itself contains a dictionary.

</F>





From michael at adrhinum.de  Thu Feb  9 03:47:01 2006
From: michael at adrhinum.de (Michael Amrhein)
Date: Thu, 09 Feb 2006 09:47:01 +0100
Subject: Natural Language Date Processing.
In-Reply-To: <mailman.1560.1139336482.27775.python-list@python.org>
References: <mailman.1544.1139316354.27775.python-list@python.org>	<43E8D051.1080801@adrhinum.de>
	<mailman.1560.1139336482.27775.python-list@python.org>
Message-ID: <43EB0185.9070009@adrhinum.de>

Andrew Gwozdziewycz schrieb:
>> You may take a look at http://labix.org/python-dateutil
>> Have fun
>> Michael
>>
> 
> Looks like it does a good job parsing dates, but doesn't seem to do
> english dates. I found a javascript implementation of a few functions
> that will probably be relatively easy to port to python. Whether or
> not it'll perform well is another story... Thanks for the help.
> 
> --
> Andrew Gwozdziewycz <apgwoz at gmail.com>
> http://ihadagreatview.org
> http://plasticandroid.org

 >>>from dateutil.parser import parse
 >>>parse("April 16th, 2003")
datetime.datetime(2003, 4, 16, 0, 0)
 >>>parse("4/16/2003")
datetime.datetime(2003, 4, 16, 0, 0)

Aren't these "english dates"?

Michael


From eric.nieuwland at xs4all.nl  Wed Feb  1 11:11:24 2006
From: eric.nieuwland at xs4all.nl (Eric Nieuwland)
Date: Wed, 1 Feb 2006 17:11:24 +0100
Subject: urllib2 - My POST Request just isn't working right
In-Reply-To: <312cfe2b0602010753uc363a85wb3f87cf2677993a2@mail.gmail.com>
References: <312cfe2b0602010753uc363a85wb3f87cf2677993a2@mail.gmail.com>
Message-ID: <2aa6acc6152072cf4348c89d27509a88@xs4all.nl>

Hi Greg,

> values = {'request':xml_request}
> headers = { 'Referer' : 'YourCompany',
>             'Host':'https://gatewaybeta.fedex.com/GatewayDC',
>             'Accept':'image/gif, image/jpeg, image/pjpeg, text/plain,
> text/html, */*',
>             'Content-Type':'image/gif'
>             }

Could it be Host? It should be "gatewaybeta.fedex.com" AFAIKT

--eric



From shirow at gmx.net  Sat Feb 11 11:19:53 2006
From: shirow at gmx.net (Daniel Marcel Eichler)
Date: Sat, 11 Feb 2006 17:19:53 +0100
Subject: How to check...
In-Reply-To: <1139660094.920792.136560@g14g2000cwa.googlegroups.com>
References: <1139660094.920792.136560@g14g2000cwa.googlegroups.com>
Message-ID: <200602111719.54500.shirow@gmx.net>

Lad wrote:

>How can I  check that a string does NOT contain NON English characters?

try:
    foobar.encode('ascii')
except:
    bla

or use string.ascii_letters and enhance it.


mfg

Daniel


From silverburgh.meryl at gmail.com  Sun Feb 26 16:00:42 2006
From: silverburgh.meryl at gmail.com (silverburgh.meryl at gmail.com)
Date: 26 Feb 2006 13:00:42 -0800
Subject: UnboundLocalError: local variable 'colorIndex' referenced
Message-ID: <1140987642.195734.187540@t39g2000cwt.googlegroups.com>

Can you please tell me what is the meaning this error in general?

 UnboundLocalError: local variable 'colorIndex' referenced before
assignment

In my python script,
I have a variable define and init to 0, like this
colorIndex  = 0

and in one of my functions,  I increment it by 1
def myFunc 
   colorIndex += 1



From webraviteja at gmail.com  Mon Feb  6 10:02:54 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 6 Feb 2006 07:02:54 -0800
Subject: Python and Flash
In-Reply-To: <1139230361.675896.241920@z14g2000cwz.googlegroups.com>
References: <1139230361.675896.241920@z14g2000cwz.googlegroups.com>
Message-ID: <1139235297.903689.244030@z14g2000cwz.googlegroups.com>

You have not stated where the Python code needs to reside.

On the server, you can use XML-RPC or SOAP. Flash either supports them
natively or has libraries for those. Your web service servers can be
written in Python. This is the perhaps the best approach.

On the client, Python can be installed as a client side scripting
language within IE on Windows. There used to be an article floating
around on that quite a while ago. Can be deployed as a COM server on
the client too and scripted within the browser. But this is of course
neither a desirable nor portable solution.



From grante at visi.com  Sun Feb  5 21:10:35 2006
From: grante at visi.com (Grant Edwards)
Date: Mon, 06 Feb 2006 02:10:35 -0000
Subject: Best way of finding terminal width/height?
References: <96nFf.43896$d5.199922@newsb.telia.net>
	<11uc3dohfitotc5@corp.supernews.com>
	<jysFf.155352$dP1.513537@newsc.telia.net>
Message-ID: <11udc0r2bq11042@corp.supernews.com>

On 2006-02-05, Joel Hedlund <joel.hedlund at gmail.com> wrote:

>> Which details?  We'd be happy to explain the code. Not that
>> you need to understand the details to use the code.
>
> OK, why '1234' in here, and what's termios.TIOCGWINSZ,

Second question first: TIOCGWINSZ is just a platform-defined
magic number that you pass to ioctl() to tell it that you want
to get the terminal window size:

  Terminal IO Control Get WINdow SiZe
  T        IO C       G   WIN    S Z  

> and how should I have known this was the way too do it?

Because if you're writing low level screen management stuff for
Unix you know that sort of stuff.  BTW: don't forget to attach
a handler to the window-size-change signal (SIGWINCH) so that
you know when your terminal changes sizes (which means you need
to call the function to get the current size again and
re-layout your screen).

> fcntl.ioctl(fd, termios.TIOCGWINSZ, '1234')

Now the '1234' question.  This bit _is_ a bit ugly. ioctl()
expects a third parameter which is input data in the case of
"write-like" ioctl() calls.  If the ioctl() is a "read-like"
call, the third argument is merely a string that specifies how
many data bytes the ioctl call is expected to return.  In this
case the TIOGWINSZ ioctl will return 4 bytes of data (two
16-bit integers), so we pass it a 4 byte string to tell the
ioctl module how much memory to allocate for the value to be
returned.

It's explained in more detail at 

http://docs.python.org/lib/module-fcntl.html

> Am I interpreting C structs here,

Yes.  Which I can see might be considered "un-pythonic", but
it's a common enough paradigm that the "struct" module is
included in the standard library for just that task.

> and if so - why is python giving me C structs?

Because ioctl() is Unix's junk-drawer.  It's full of
miscellaneous crap that didn't fit anywhere else (and often was
an after-thought).  The python module would require a _lot_ of
very nasty system-specific knowledge and logic to implicitly
figure out the types of passed and returned data. Since it's
not used that much, nobody has put the work required to make
Python's ioctl module omniscient.  Some of the more common
stuff probably has been provided in a more abstract manner.

> And what's 'hh' anyway? struct.unpack('hh', ... )

It's specifying the types of the "fields" within the struct.
'h' means a short (16-bit) integer.  The struct returned from
the ioctl() is going to contain two 16-bit integers. The full
description of struct formats is at

http://docs.python.org/lib/module-struct.html


> Why 0, 1 and 2?
> cr = ioctl_GWINSZ(0) or ioctl_GWINSZ(1) or ioctl_GWINSZ(2)

0 is the file descriptor for standard input, 1 is standard
output, and 2 is standard error.  If your program has a
terminal, one of them may be connected to it.

> > I don't know if it will work on MS Windows or not.
>
> Linux and unix are my main concerns, but it would be neat to know if it 
> would work on Win/Mac.

Homey don't do Windows, so you'll have to ask somebody else that.

> What OS:es set the COLS/ROWS env vars?

None.  Some shells set those environment variables.  They may
be wrong if the terminal has changed size since your program
was started.

> What OS:es can leverage the termios module?

I don't know what you mean by "leverage the termios module".

> I have a hunch that we have 100% overlap there,

No comprende.

> and then this solution leaves me at square one (arbitrary
> choice of 80*25) for the others OS:es (or am I wrong?).

Dunno.  I've been using Unix for 25+ years.  I tried Windows a
few times and though it sucked rather badly.  Now that Cygwin
is around it sucks slightly less (but only slightly).

> How do Win/Mac people do this?

AFAICT, Win/Mac people don't.  

They just don't write console programs.  Unless you're talking
about Mac OS X, and that's just BSD Unix, so they do it using
ioctl().

>> What's unpythonic about the example you found?
>
> Maybe I did bit of poor wording there, but In my experience python 
> generally has a high level of abstraction, which provides linguistically 
> appealing (as in "in english") solutions to almost any problem.

For popular and common tasks that's true.  For stuff nobody
ever does, you usually fall back to the underlying platform
mechanism.

> Like for example how os.path.isfile(s) tells me if my string s
> corresponds to a file. I guess that's what I mean really. I
> sort of expected to find something like my terminal_size()
> example in the built-in modules.

I would guess that the real answer is that so few people have
ever wanted it that nobody has ever created a module and
submitted it.  Feel free... ;)

> I didn't expect to have to do that struct fcntl ioctl boogey
> to solve this relatively simple (?) problem.

Getting terminal size may be a simple problem, but it's only a
small part of a complex and difficult task (managing 
"full-screen" terminal-mode apps).  People who write
terminal-mode apps in python generally do one of two things:

 1) Just write a normal Unix-like text processing "filter". 
    Those programs don't generally care about the terminal size
    since they may not be connected to a terminal at all.

 2) Use a terminal management library like ncurses+panel or
    slang+newt.  That way you get a much higher level more
    abstract API.
    
-- 
Grant Edwards                   grante             Yow!  Don't SANFORIZE me!!
                                  at               
                               visi.com            


From gregory.petrosyan at gmail.com  Mon Feb 13 17:57:51 2006
From: gregory.petrosyan at gmail.com (Gregory Petrosyan)
Date: 13 Feb 2006 14:57:51 -0800
Subject: Pythonic gui format?
In-Reply-To: <1139870393.794624.181380@z14g2000cwz.googlegroups.com>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<dsqocq$dcq$1@bagan.srce.hr>
	<1139862779.383505.20890@g44g2000cwa.googlegroups.com>
	<1139870393.794624.181380@z14g2000cwz.googlegroups.com>
Message-ID: <1139871471.594329.280040@g44g2000cwa.googlegroups.com>

I need format, specialised for manual editing.
(And in this case  a) I don't want/need to develop/find GUI forms
editors etc;  b) maybe python is better for manual work? XML is pretty
nice for machines, but what about human mind: what is closer to it?)

Anyway, thanks for your help & attention.



From fredrik at pythonware.com  Sun Feb 12 17:22:33 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sun, 12 Feb 2006 23:22:33 +0100
Subject: Another n00b: Removing the space in "print 'text', var"
References: <43efb1ba$0$14855$c3e8da3@news.astraweb.com>
Message-ID: <dsocfd$qp0$1@sea.gmane.org>

"HappyHippy" wrote:

> More of a minor niggle than anything but how would I remove the
> aforementioned space?
>
> eg.
> strName = 'World'
> print 'Hello', strName, ', how are you today?'
>
> comes out as "Hello World , how are you today?"
>
> Have googled, and worked my way through the first 7 chapters of Byte of
> Python, but to no avail...

you can concatenate the strings before passing them to print:

    text = 'Hello' + strName + ', how are you today?'
    print text

or do the same on one line

    print 'Hello' + strName + ', how are you today?'

or use string formatting (the % operator), or write to the special sys.stdout
file object (output to files is discussed in chapter 12).

</F>





From aleaxit at yahoo.com  Fri Feb 10 01:32:48 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Thu, 9 Feb 2006 22:32:48 -0800
Subject: Question about idioms for clearing a list
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au>
	<ds83kd$98m$1@sea.gmane.org>
	<mailman.1510.1139250471.27775.python-list@python.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>
	<mailman.1546.1139320907.27775.python-list@python.org>
	<dscdtr$ciu$1@wake.carmen.se>
	<mailman.1594.1139403378.27775.python-list@python.org>
	<dsd311$qlp$1@wake.carmen.se>
	<ZatGf.28418$F_3.14242@newssvr29.news.prodigy.net>
	<dsfej3$1i6$1@wake.carmen.se>
	<cQRGf.54501$PL5.14689@newssvr11.news.prodigy.com>
Message-ID: <1haij56.14jpj06cl31lkN%aleaxit@yahoo.com>

Bryan Olson <fakeaddress at nowhere.org> wrote:
   ...
> > I agree that emptying is logically the same thing for all of these
> > types. Beyond that, they don't seem to have a lot in common. It's
   ...
> > Do you really have a usecase for this? It seems to me that your
> > argument is pretty hollow.
> 
> Sure:
> 
>      if item_triggering_end in collection:
>          handle_end(whatever)
>          collection.clear()
> 
> Or maybe moving everything from several collections into
> a single union:
> 
>      big_union = set()
>      for collection in some_iter:
>          big_union.update(t)
>          collection.clear()

I was thinking of something different again, from a use case I did have:

def buncher(sourceit, sentinel, container, adder, clearer):
    for item in sourceit:
        if item == sentinel:
            yield container
            clearer()
        else
            adder(item)
    yield container

s = set()
for setbunch in buncher(src, '', s, s.add, s.clear): ...

d = dict()
for dictbunch in buncher(src, '', d, lambda x: d.setdefault(x,''),
                                    d.clear): ...

L = list()
for listbunch in buncher(src, '', L, L.append,
                            lambda: L.__setslice__(0,len(L),[])): ...

the dict case is semi-goofy (since some arbitrary value must be set, one
ends up with a lambda willy nilly), but the list case is even worse,
with that horrid "lambda calling __setslice__" (eek).

BTW, we do have other mutable collections...:

import collections
q = collections.deque()
for qbunch in buncher(src, q, q.append, q.clear): ...

just as neat as a set.

So what is the rationale for having list SO much harder to use in such a
way, than either set or collections.deque?  (For dict, I can see the
rationale for not having an 'addkey', even though the presence of class
method 'fromkeys' weakens that rationale... but for list, I cannot see
any reason that makes sense to me).


Alex


From bokr at oz.net  Sun Feb 12 14:44:01 2006
From: bokr at oz.net (Bengt Richter)
Date: Sun, 12 Feb 2006 19:44:01 GMT
Subject: ordered sets operations on lists..
References: <mailman.1722.1139590689.27775.python-list@python.org>
	<1139592166.993686.212000@f14g2000cwb.googlegroups.com>
	<1139599834.975607.77180@f14g2000cwb.googlegroups.com>
	<1halbdx.dd0p1l1obawfkN%aleaxit@yahoo.com>
Message-ID: <43ef8e5f.625119424@news.oz.net>

On Sat, 11 Feb 2006 10:24:04 -0800, aleaxit at yahoo.com (Alex Martelli) wrote:

>Raymond Hettinger <python at rcn.com> wrote:
>   ...
>> The intersection step is unnecessary, so the answer can be simplified a
>> bit:
>> 
>> >>> filter(set(l2).__contains__, l1)
>> [5, 3]
>> >>> filter(set(l1).__contains__, l2)
>> [3, 5]
>
>...and if one has time to waste, "setification" being only an
>optimization, it can also be removed: filter(l2.__contains__, l1) etc
>(very slow for long lists, of course).
>
>Personally, I'd always use (depending on guesses regarding lengths of
>lists) [x for x in l1 if x in l2] or the setified equivalent, of course.
>
Perhaps newbies should be advised that

    [x for x in l1 if x in set(l2)]

is not a (well) setified equivalent? I could see them being tempted.

Regards,
Bengt Richter


From steve at REMOVETHIScyber.com.au  Sun Feb 12 10:11:05 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Mon, 13 Feb 2006 02:11:05 +1100
Subject: Is python very slow compared to C
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
	<1139754010.067582.214830@z14g2000cwz.googlegroups.com>
Message-ID: <pan.2006.02.12.15.11.04.739314@REMOVETHIScyber.com.au>

On Sun, 12 Feb 2006 06:20:10 -0800, bonono wrote:

> 
> Steven D'Aprano wrote:
>> But, in general, more often than not, Python is fast enough. The extra
>> value of using something like Lua or Ocaml or even C is just not enough to
>> make up for the disadvantages of using those languages.
>>
> What is the disavantage of Lua comparing with Python ? Or Ocaml
> comparing with Python ?

If your developer gets hit by a bus, you won't easily find a replacement.
This may not be a factor if you are programming for pleasure, but in the
commercial world of software development, availability of skilled
programmers is absolutely critical for the use of a language.

I realise that neither Lua nor Ocaml are entirely unknowns, both have been
used commercially, but I believe Python developers are more widely
available.

Google "python programming": 19,000,000 hits.
Google "lua programming": 574,000 hits.
Google "ocaml programming": 325,000 hits.

That will give you a rough estimate for the amount of resources out there
on the web for each language. By comparison, even Forth gives 13 million
plus hits, and who uses Forth?

Another rough measure of the availability of resources is the Dummies test:

Google "python for dummies": 323,000 hits.
Google "lua for dummies": 46,400 hits.
Google "ocaml for dummies": 693 hits.

Only Python For Dummies is an actual dead-tree book. I think it is safe to
conclude that Lua and Ocaml offer far fewer resources for somebody looking
to learn the language than does Python.

Lua appears to be *too* lightweight, without even classes or inheritance,
and a single data type where Python has dicts, sets, tuples and lists.

Ocaml seems to use more punctuation than I'm comfortable with (lots of
double semi-colons and -> symbols), but Python seems to be moving along
those lines too with list and generator comprehensions, and none of us
really want to return to Cobol's verbose arithmetic.

Wikipedia says "However, [Ocaml] also forces the programmer to conform to
the constraints of the type system, which can require careful thought and
close attention. ... effective use of OCaml's type system can require some
sophistication on the part of the programmer." That suggests that writing
Ocaml code may be more difficult than writing Python code. Wikipedia also
emphasises how hard it is for the compiler to generate good quality
machine code from Ocaml, which suggests that perhaps the compilation stage
could be slow.


-- 
Steven.



From __peter__ at web.de  Thu Feb  9 08:13:02 2006
From: __peter__ at web.de (Peter Otten)
Date: Thu, 09 Feb 2006 14:13:02 +0100
Subject: line wrapping problem
References: <1139484488.037165.106170@g43g2000cwa.googlegroups.com>
Message-ID: <dsff21$c8l$02$1@news.t-online.com>

S Borg wrote:

> I am parsing text from one document to another. I have a scheme
> similar to:
> 
>  for x in myfoobar:
>    print >> mytextfile, "%s    " % mydictionary[x],   #all on same line

   print >> mytextfile      # minimal fix

> I am getting line breaks before my explicit line break. Am I
> unwittingly copying '\n' characters from the original file?
> How should I fix this(What is the 'Pythonic' solution)?

The trailing spaces are probably an artifact of your implementation. Here's
one way to avoid them:

print >> mytextfile, "     ".join(str(mydictionary[x]) for x in myfoobar)

Peter



From seberino at spawar.navy.mil  Tue Feb 14 20:40:32 2006
From: seberino at spawar.navy.mil (seberino at spawar.navy.mil)
Date: 14 Feb 2006 17:40:32 -0800
Subject: 'could not open display' error when import gtk  - how fix?
Message-ID: <1139967632.229372.8360@g47g2000cwa.googlegroups.com>

Why can't I import gtk (pygtk) module?  It appears gtk module want X
perms?


>>> import gtk
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/lib/python2.3/site-packages/gtk-2.0/gtk/__init__.py", line
37, in ?    from _gtk import *
RuntimeError: could not open display



From jcoleman at franciscan.edu  Sat Feb 25 09:09:16 2006
From: jcoleman at franciscan.edu (John Coleman)
Date: 25 Feb 2006 06:09:16 -0800
Subject: Is Python a Zen language?
Message-ID: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>

Greetings,
   I have a rough classification of languages into 2 classes: Zen
languages and tool languages. A tool language is a language that is,
well, a *tool* for programming a computer. C is the prototypical tool
language. Most languages in the Algol family are tool languages. Visual
Basic and Java are also tool languages. On the other hand, a Zen
language is a language which is purported to transform your way of
thinking about programming. Lisp, Scheme, Forth, Smalltalk and (maybe)
C++ are Zen languages. Disciples acknowledge that it is difficult to
pick up these languages but claim that, if you persevere, you sooner or
later reach a state of computational satori in which it all makes
sense. Interestingly enough, these languages often have books which
approach scriptural status  e.g. SICP for Scheme.

So (assuming my classification makes sense)  which is Python? The
emphasis on simplicity and the beginner-friendly nature of it seems to
put it in the tool category. On the other hand, the emphasis on the ONE
TRUE WAY to accomplish most tasks and the tendency for participants in
this newsgroup to criticize one another's code as being "unpythonic"
seems to move it towards the Zen category. Of course, even tool
languages have their idioms which the novice needs to pick up, so maybe
this isn't decisive, but I detect an element of zeal in this newsgroup
that I don't detect in (say) Excel VBA programming newsgroups.

No value judgement is intended by my classification. There is no
denying that Zen languages are often very powerful tools (for those who
have reached satori) and that there is a Zen to really mastering, say,
C. Personally, I have never been able to master any Zen language but
can pick up tool languages fairly quickly, so I prefer tool languages.
This is probably because I am not a programmer (I'm a mathematician who
likes to program as a hobby and for numerical simulations) and so don't
have the time to invest in picking up a Zen language. Hard-core hackers
might presumably lean towards the Zen languages.

Just curious

-John Coleman



From zzhikang at hotmail.com  Wed Feb 22 23:31:28 2006
From: zzhikang at hotmail.com (kanchy kang)
Date: Thu, 23 Feb 2006 04:31:28 +0000
Subject: May i customize basic operator (such as 1==3)?
In-Reply-To: <dtj2np$f3k$1@sea.gmane.org>
Message-ID: <BAY108-F344030BE97D6AB66DC4901CDF20@phx.gbl>

Is there any reviews/remarks on these frameworks?
nose, OOBTest,testosterone, py.test, Sancho.


>From: Robert Kern <robert.kern at gmail.com>
>To: python-list at python.org
>Subject: Re: May i customize basic operator (such as 1==3)?
>Date: Wed, 22 Feb 2006 19:22:00 -0600
>
>kanchy kang wrote:
> > Is there any improvement version for standard unittest module?
> > for example, output log information as files.
>
>Several! Some build on the framework of unittest.py: nose, OOBTest,
>testosterone. Some don't: py.test, Sancho.
>
>--
>Robert Kern
>robert.kern at gmail.com
>
>"In the fields of hell where the grass grows high
>  Are the graves of dreams allowed to die."
>   -- Richard Harter
>
>--
>http://mail.python.org/mailman/listinfo/python-list

_________________________________________________________________
Don?t just search. Find. Check out the new MSN Search! 
http://search.msn.click-url.com/go/onm00200636ave/direct/01/



From samrobertsmith at gmail.com  Fri Feb 10 06:20:53 2006
From: samrobertsmith at gmail.com (linda.s)
Date: Fri, 10 Feb 2006 03:20:53 -0800
Subject: a second TKinter
In-Reply-To: <6f4025010602100256m5f390357o@mail.gmail.com>
References: <1d987df30602100253x33aece59u425dd7d61c0ffa3f@mail.gmail.com>
	<6f4025010602100256m5f390357o@mail.gmail.com>
Message-ID: <1d987df30602100320t4c61673ewfa6cd0f685a24bab@mail.gmail.com>

On 2/10/06, Michael Foord <fuzzyman at gmail.com> wrote:
>
>
>
> On 10/02/06, linda.s <samrobertsmith at gmail.com> wrote:
> > I found if I opened a second TKinter, Python will go out of work. But
> > I need two graph outputs at the same time. What to do?
> > Linda.
> >
>
>
> Hello linda (?),
>
> How are you opening a 'second Tkinter' ? There is no problem with having two
> top level windows at the same time, you can't hjave two 'mainloops' though.
> :-)
>
> All the best,
>
> Fuzzyman
What does "having two top level windows" mean?
Can you give an example?
For opening a second tkinter, i mean that I run python using
PythonWin: if I run the code again when the first Tk is still open,
then the program will crash.


From python.list at tim.thechases.com  Fri Feb 10 13:12:42 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Fri, 10 Feb 2006 12:12:42 -0600
Subject: is there a better way?
In-Reply-To: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
Message-ID: <43ECD79A.1000601@tim.thechases.com>

> You have a list of unknown length, such as this: list =
> [X,X,X,O,O,O,O].  You want to extract all and only the X's.  You know
> the X's are all up front and you know that the item after the last X is
> an O, or that the list ends with an X.  There are never O's between
> X's.
> 
> I have been using something like this:
> _____________________
> 
> while list[0] != O:
>     storage.append(list[0])
>     list.pop(0)
>     if len(list) == 0:
>         break
> _____________________

While it doesn't modify your list, you can try something like

	storage = [q for q in myList if q != O]

If you've already got stuff in storage that you want to keep, you 
can use

	storage.extend([q for q in myList if q != O])

I suppose, if you wanted to remove all the O's, you could then 
just do

	myList = [q for q in myList if q == O]

(trickiness using Oh's vs. using zeros...)

-tkc








From mikeisgreat at gmail.com  Thu Feb  2 14:41:36 2006
From: mikeisgreat at gmail.com (mikeisgreat at gmail.com)
Date: 2 Feb 2006 11:41:36 -0800
Subject: learning python, using string help
In-Reply-To: <fwsEf.24314$1%5.18129@tornado.texas.rr.com>
References: <1138906062.727850.177960@g14g2000cwa.googlegroups.com>
	<fwsEf.24314$1%5.18129@tornado.texas.rr.com>
Message-ID: <1138909296.301962.16230@z14g2000cwz.googlegroups.com>

Well, I did want to add some formatting for example

STATUS = "up"

getrup = os.popen('ruptime').read()
show = getrup.splitlines()
gethost = show[0]
hostname = gethost.split()
print hostname[0]
getstatus = hostname[1]

if getstatus.find("STATUS"):
	print STATUS
else:
	print "<font color='RED'>HOST DOWN</font>"

I think that will convey what I am attempting.


I know that is sloppy, but I am learning .. 
Thanks for your patience.



From tim.golden at viacom-outdoor.co.uk  Wed Feb 15 09:27:32 2006
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Wed, 15 Feb 2006 14:27:32 -0000
Subject: Win32_Process.Create -- not starting process
Message-ID: <9A28C052FF32734DACB0A288A3533991044D2568@vogbs009.gb.vo.local>

[abcd]

|    Ok, well I verified that my python script and batch script are
| working properly.  In fact, if I double click on the batch 
| script (when its on Computer B), it starts the python script and the
script runs
| fine with no problem.

That's all very well, and it does confirm that there's no
obvious error in the file, but by running the batch script
*on* the computer it's on, you're running it in a particular
environment / context etc. That environment isn't (necessarily)
the same when you're running it across WMI.

All I'm saying is that remotely executed jobs tend to be
sensitive to environment issues which one is usually
unconcerned about. This is as true for cron jobs or
ssh-initiated execution on Unix as it is for WMI or
service-driven execution under Windows.

| However when I try to execute the batch script from computer A
| using WMI it doesnt start.  I say that because the python script that
| gets executed writes a status message to a file, and that does not
| occur as well as Python.exe does not show up in the task manager, even
| though Win32_Process.Create returns a PID and a 0 for the return code.
| So, if I try the same process a second time...it works.  python.exe is
| running, status message is written to a file, etc.  Is there some sort
| of initialization that needs to be done?

Ok. That's certainly peculiar. I assume that the pid / zero-return
is because the batch script itself is run; it's only the python
script which isn't. Which doesn't explain why it runs the second
time.

Some obvious test cases:

1) If you have the batch script write something out to file by itself,
does that happen? (eg SET > c:\temp.txt). Note - make sure the log
file destination is absolute, ie c:\temp.txt, not just temp.txt.

<test.cmd>
SET > c:\temp\test.txt
</test.cmd>

2) If you bypass the batch altogether, does that work, eg

<code>
import wmi
c = wmi.WMI ()
c.Win32_Process.Create (CommandLine=r"c:\python24\python
c:\temp\test.py")
</code>

If this isn't getting you anywhere, could you post up
or send me privately your batch and python scripts?

TJG

________________________________________________________________________
This e-mail has been scanned for all viruses by Star. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
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From jeff at taupro.com  Fri Feb  3 11:06:09 2006
From: jeff at taupro.com (Jeff Rush)
Date: Fri, 03 Feb 2006 10:06:09 -0600
Subject: Wanted: Django Programmer Seeking PyCon Fame and Glory
Message-ID: <43E37F71.1050409@taupro.com>

Coming to PyCon 2006 in Dallas in a few weeks?  Want to make a name for 
yourself before you arrive?  Think Django is cool and want everyone else to 
know it?

Whip up a Django app to slide into the PyCon website (already running Django 
in part) that hooks into Google's Map API.  Provide a way for conference 
attendees to stick virtual pins on where they are from (and perhaps leave a 
popup note for others to find ;-).

There are already 350 people signed up, so your application must scale that 
far.  The PyCon website already runs PostgreSQL or store the data in a local 
file of some flavor, your choice, but make sure its reasonably CPU 
efficient.  The trick is to provide a user API for attendees to enter or 
mark their origin.  Must be themable to drop into the site's existing layout.

You only have until Feb 22 to implement it, and achieve glory.  The 
conference website is at http://us.pycon.org.  Drop me a line if you have 
questions to get your finished application installed on the conference server.

(offer includes fame only, no fortune).

-Jeff

P.S. Can't make it to PyCon this year?  Hey, you too can write the app and 
let'm know what they missed!



From steve at holdenweb.com  Tue Feb 21 10:17:16 2006
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 21 Feb 2006 10:17:16 -0500
Subject: Mutable numbers
In-Reply-To: <43fb2462$0$3211$636a55ce@news.free.fr>
References: <dteele$9pi$1@home.itg.ti.com>
	<43fb2462$0$3211$636a55ce@news.free.fr>
Message-ID: <dtfatt$fna$2@sea.gmane.org>

fraca7 wrote:
> Suresh Jeevanandam a ?crit :
> 
>># I am new to python.
>>
>>In python all numbers are immutable. This means there is one object ( a 
>>region in the memory ) created every time we do an numeric operation. I 
>>hope there should have been some good reasons why it was designed this way.
> 
> 
> The memory allocation for integers is optimized. 'Small' integers 
> (between -5 and 100 IIRC) are allocated once and reused. The memory for 
> larger integers is allocated once and reused whenever possible, so the 
> malloc() overhead is negligible.

[Thinks: or maybe fraca7 just meant that integers will be garbage 
collected when there are no more references to them].

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From robert.kern at gmail.com  Mon Feb  6 12:49:32 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 06 Feb 2006 11:49:32 -0600
Subject: Scientific Computing with NumPy
In-Reply-To: <ds7bvh$ab1$2@gemini.csx.cam.ac.uk>
References: <ds7bvh$ab1$2@gemini.csx.cam.ac.uk>
Message-ID: <ds827a$30g$1@sea.gmane.org>

mclaugb wrote:
> Has anyone recompiled the Scientific Computing package using NumPy instead 
> of Numeric?

What "Scientific Computing" package? I don't know of any package under that
name. AFAIK, Konrad Hinsen has not yet ported his ScientificPython package to
numpy, yet.

scipy 0.4+ is ported to numpy (I recommend using an SVN checkout rather than the
tarball).

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From steve at holdenweb.com  Sun Feb 12 23:00:55 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 12 Feb 2006 23:00:55 -0500
Subject: Jython socket typecasting problems
In-Reply-To: <456l92F554abU1@uni-berlin.de>
References: <1139678202.221563.308700@f14g2000cwb.googlegroups.com>
	<456l92F554abU1@uni-berlin.de>
Message-ID: <dsp09k$cpd$1@sea.gmane.org>

Diez B. Roggisch wrote:
>>This is the code section of my server class (I cut this from a Python
>>example):
>>    def establishConnection(self):
>>        self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>>        self.socket.connect((self.host, self.port))
>>Do I have to use explicit typecasting? How can this be achieved?
> 
> 
> There is no such thing as explicit casting in python. You can coerce 
> values to values of another type - e.g. float("1.0"), and there are some 
> "magic" methods to support that (for that example __float__)
> 
> However, that doesn't seem to be your problem. You just pass the wrong 
> arguments, which makes the jython wrapping punke on you as only certain 
> types can be dealt with.
> 
> To me this looks as if you are supposed to do it like this:
> 
> self.socket.connect(self.host, self.port)
> 
> Note the missing parentheses.
> 
"""connect(address)
     Connect to a remote socket at address. (The format of address 
depends on the address family -- see above.) Note: This method has 
historically accepted a pair of parameters for AF_INET addresses instead 
of only a tuple. This was never intentional and is no longer available 
in Python 2.0 and later. """

So if Jython 2.1 is conformant it should indeed require a single 
argument which is an (IPAddress, port) tuple.

It might be that the OP can't, for some reason associate with the local 
environment, resolve "localhost" to an IP address. What happens if 
"127.0.0.1" is substituted?

Irrespective of that, it does seem that the error message is at best 
misleading and at most just plain wrong. There's aproject to bring 
Jython up to a more recent specification, but it will take time ...

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From mfranklin1 at gatwick.westerngeco.slb.com  Fri Feb 24 04:46:33 2006
From: mfranklin1 at gatwick.westerngeco.slb.com (Martin Franklin)
Date: Fri, 24 Feb 2006 09:46:33 +0000
Subject: regular expresson for Unix and Dos Lineendings wanted
In-Reply-To: <dohtv1h996df7h2jhdn3i283gac99rra3b@4ax.com>
References: <jterv157550g4qd4rosc3a2o8l69gcau8v@4ax.com>
	<dohtv1h996df7h2jhdn3i283gac99rra3b@4ax.com>
Message-ID: <43FED5F9.2060108@gatwick.westerngeco.slb.com>

Franz Steinhaeusler wrote:
> On Thu, 23 Feb 2006 14:46:20 +0100, Franz Steinhaeusler
> <franz.steinhaeusler at gmx.at> wrote:
> 
>> Hello, I need a regularexpression, which trims trailing whitespaces.
>>
>> While with unix line endings, it works; 
>> but not with Window (Dos) CRLF's:
> 
> Thank you all for the replies.
> But I still don't have a solution.
> 
> Of course with more lines it is possible, 
> but it would be fine to have a "oneliner".
> 


Then I clearly don't understand your problem... it seems we gave
you several ways of skinning your cat... but none of them 'worked'?
I find that hard to believe... perhaps you can re-state you problem
or show us your more than one line solution...(so that we might learn
from it)


Martin


From tjreedy at udel.edu  Fri Feb  3 15:27:51 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 3 Feb 2006 15:27:51 -0500
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<drvd56$nb3$1@wake.carmen.se>
Message-ID: <ds0ed1$npe$1@sea.gmane.org>


"Magnus Lycka" <lycka at carmen.se> wrote in message 
news:drvd56$nb3$1 at wake.carmen.se...
> n.estner at gmx.de wrote:
> Today, Python has a syntactic shortcut. If 'a' is an
> instance of class 'A', a.f(x,y,z) is a shortcut for
> A.f(a,x,y,z). If you don't use the shortcut, there is
> no magic at all, just the unusual occurence of a type
> check in Python!

As was once pointed out to me some years ago, when I wrote something 
similar, a.f() is not just a shortcut for A.f(a) [a.__class__.f(a)].   The 
latter only looks for f in the class A namespace while the former also 
looks in superclass namespaces.  The 'magical' part of accessing functions 
via instances is the implementation of dynamic inheritance.

Terry Jan Reedy





From stanc at al.com.au  Fri Feb 17 07:12:11 2006
From: stanc at al.com.au (Astan Chee)
Date: Fri, 17 Feb 2006 23:12:11 +1100
Subject: Terminating a function
In-Reply-To: <45ls4mF7ch23U1@uni-berlin.de>
References: <mailman.2045.1140174459.27775.python-list@python.org>
	<45ls4mF7ch23U1@uni-berlin.de>
Message-ID: <43F5BD9B.7040705@al.com.au>

I was thinking of threads but I just simply want to terminate a (global) 
function after it has been running for more than 5 minutes regardless of 
state.
I was assuming I needed threads because it can calculate time elapsed 
(that and im rather inexperienced with threads)
Thanks again for your help!

Diez B. Roggisch wrote:

>Astan Chee wrote:
>
>  
>
>>Hi,
>>Im rather new to threads in python but Im trying to terminate a function
>>call (or the execution of the function) after a certain period of time
>>has passed.
>>Do i need to use threads with this? if i do, how do i go about doing it?
>>    
>>
>
>Yes and no. As you didn't tell us muc about your actual problem, threads
>might be what you need. But you _can't_ just stop a thread - however,
>depending on what you do, you can for example regularly check for a flag
>inside your function and then  terminate:
>
>class Foo(threading.Thread):
>   def __init__(self):
>      super(Foo, self).__init__()
>      self.setDaemon(True)
>      self.interrupted = False
>
>   def run(self):
>       while not self.interrupted:
>           do_some_work_but_make_sure_to_come_back_regularly()
>
>
>f = Foo()
>f.start()
>
>time.sleep(10)
>f.interrupted = True
>
>Diez
>  
>
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From singletoned at gmail.com  Wed Feb  8 07:56:14 2006
From: singletoned at gmail.com (Ed Singleton)
Date: Wed, 8 Feb 2006 12:56:14 +0000
Subject: Question about idioms for clearing a list
In-Reply-To: <dscdtr$ciu$1@wake.carmen.se>
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<ds83kd$98m$1@sea.gmane.org> <43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>
	<mailman.1546.1139320907.27775.python-list@python.org>
	<dscdtr$ciu$1@wake.carmen.se>
Message-ID: <34bb7f5b0602080456w567e85e6r@mail.gmail.com>

On 08/02/06, Magnus Lycka <lycka at carmen.se> wrote:
> Ed Singleton wrote:
> > I'm a fairly average programmer (better than average compared to my
> > immediate colleagues).  I've read every tutorial I can get my hands
> > on, but I have no _memory_  of ever coming across the del keyword, let
> > alone that it is fundamental to Python, and I have no idea what
> > collections school is.  I doubtless have read of it at some point, but
> > as no importance has ever been attached to it, I have probably not
> > remembered it.
> >
> > Similarly, I remember slices simply because they are handy, not
> > because I have ever heard of them being fundamental before.
>
> Ok, I can understand that, but I  think that you really understand
> that the strength of a programming language such as Python is that
> it's like lego bricks. You have some basic pieces, and you can
> combine them to into something unique that does what you want.
>
> There are plenty of statements, operators, functions, types, modules
> and other things in Python already. I can well imagine that you had
> forgotten about del, and that you don't immediately think about slices
> when you wonder how to empty a list. It's like when I build lego with
> my son. I guess he has around 2000 pieces, and it's not always easy
> to spot what you need. It was difficult enough when I was a kid. Now
> there are so many different kinds of pieces, shaped to fulfil some
> niche usecase.
>
> One thing that I'm sure of is this: Making more kinds of odd-shaped
> "pieces", especially prepared to solve the specific problem I'm facing
> right now, won't make it easier to understand or use Python in the
> long run.

I agree utterly with this, particularly the general philosophy of
having simple bricks that work in as many different places as
possible.

The point is that having to use del to clear a list appears to the
inexperienced as being an odd shaped brick when they've already used
the .clear() brick in other places.

Having bricks that work in lots of places makes the language
'guessable'.  "I've never cleared a list before, but I've cleared
dictionaries and I guess the same way would work here".

The problem is you have to be very careful when talking about this,
not to use the C-word, because that's the hobgoblin of little minds,
whereas in almost every other field it is considered an important part
of usability.

> I've used Python for almost 10 years now, and I still learn new
> things, and I sometimes come across things that I once new but
> had forgotten.
>
> It might work for a while to add a new convenience function as soon
> as someone finds that they don't immediately now how to solve a
> certain problem. It's my impression that that's pretty much the idea
> with PHP. It's not Python though. PHP is only successful in a fairly
> narrow (if important) niche, it has failed in getting used outside
> its niche, and I assume we'll see a decline in its use one the web
> pretty soon, just as it happened with Perl. (Whether RoR, something
> Python based or something entirely new will replace it is beyond my
> radar screen though.)
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From kay.schluehr at gmx.net  Mon Feb 13 01:25:12 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 12 Feb 2006 22:25:12 -0800
Subject: Slightly OT: Ranking noise
Message-ID: <1139811912.124589.173260@g44g2000cwa.googlegroups.com>

For those people who use google groups to access comp.lang.python may
enjoy now looking at contentess shiny yellow stars - shining brighter
than anything else on the site. The only pattern I've found are one or
two shiny yellow stars for many newbie postings. According to the
staring semantics the plebs tries to inform me that those are mostly
irrelevant. I slightly disagree but don't want to give 5 stars anyway.
The other funny discovery I made is that some part of the mobocracy
thinks that Alex Martelli is average. My question: does anybody know
whether this post-infantile nonsense and site-noise that captures at
least my attention is anyhow customizable?

5 stars from me for a helpfull answer,
*kisses* Kay



From __peter__ at web.de  Mon Feb 20 03:31:04 2006
From: __peter__ at web.de (Peter Otten)
Date: Mon, 20 Feb 2006 09:31:04 +0100
Subject: timeit module: am I missing something obvious?
References: <43F97593.2010502@REMOVEMEcyber.com.au>
Message-ID: <dtbukp$kjq$00$1@news.t-online.com>

Steven D'Aprano wrote:

> When using the timeit module, you pass the code you
> want to time as strings:
> 
> import timeit
> t = timeit.Timer("foo(x, y)", \
> """from module import foo
> x = 27
> y = 45
> """)
> elapsed_time = t.timeit()
> 
> This is all very well, but it feels quite unnatural to
> me. Why am I passing strings around when functions are
> first class objects? Have I missed something obvious?

You are supposed to time small pieces of code where a function call would be
a significant overhead.
 
> I understand that sometimes you have to pass strings,
> because statements are NOT objects in Python. But what
> about when your code doesn't use statements?
> 
> It seems to me it would be really useful to be able to
> do something like this:
> 
> # this doesn't work...
> import timeit
> from module import foo
> x = 27
> y = 45
> t = timeit.Timer(foo, args=[x, y])
> elapsed_time = t.timeit()
> 
> instead of messing about with setup strings and the like.
> 
> Am I missing something obvious? Does this functionality
> already exist? Is there a reason why it can't exist?

Just do it :-)

I would suggest a slight modification:

t = timeit.Timer.for_function(foo, x, y, a=..., b=...)

And while you are at it you could also move the code that dynamically
adjusts the number of repetitions from the main() function into a Timer
method and make its invocation the default for the timeit() method. (If
that has not been done already, see
http://mail.python.org/pipermail/python-dev/2006-January/059952.html)

Peter


From eoinrogers at gmail.com  Tue Feb 14 13:28:11 2006
From: eoinrogers at gmail.com (Byte)
Date: 14 Feb 2006 10:28:11 -0800
Subject: Location of Python modules
In-Reply-To: <1139857482.644028.272380@o13g2000cwo.googlegroups.com>
References: <1139854184.504114.46690@z14g2000cwz.googlegroups.com>
	<1139854642.175799.165950@g43g2000cwa.googlegroups.com>
	<1139854910.669876.84730@o13g2000cwo.googlegroups.com>
	<43F0D1A7.8000501@v.loewis.de>
	<1139856376.208422.182090@f14g2000cwb.googlegroups.com>
	<1139857482.644028.272380@o13g2000cwo.googlegroups.com>
Message-ID: <1139941691.577227.319270@g43g2000cwa.googlegroups.com>

 >if it is in the sys.path

sys.path, what is this?



From sanzhiyan at gmail.com  Wed Feb  1 03:34:03 2006
From: sanzhiyan at gmail.com (Saizan)
Date: Wed, 01 Feb 2006 09:34:03 +0100
Subject: howto catch an Exception and still print the TraceBack?
Message-ID: <43e073bd$0$341$5fc30a8@news.tiscali.it>

In an event-driven application i'd like to keep the program alive regardless of any exceptions raised by the handlers,
but still be able to debug them by reading the appropriate TraceBack from stderr.
I can put something like:

try:
	self.call_handler(handler,*args)
except Exception, e:
	print e
	print e.args

in the dispatcher, but that isn't as helpful as a complete TraceBack.


From luis.armendariz at gmail.com  Wed Feb 15 17:08:04 2006
From: luis.armendariz at gmail.com (luis.armendariz at gmail.com)
Date: 15 Feb 2006 14:08:04 -0800
Subject: how to get function names from the file
In-Reply-To: <1140041022.500870.141430@g14g2000cwa.googlegroups.com>
References: <1140041022.500870.141430@g14g2000cwa.googlegroups.com>
Message-ID: <1140041284.767171.85400@f14g2000cwb.googlegroups.com>

Try the following:

def printFoo():
    print "Foo"

def printFOO():
    print "FOO"

functions = ("printFoo", "printFOO")    # list or tuple of strings from
file, or wherever
for function in functions:
    call = function + "()"
    eval(call)



From solafidefarms at gmail.com  Tue Feb 28 14:40:27 2006
From: solafidefarms at gmail.com (SolaFide)
Date: 28 Feb 2006 11:40:27 -0800
Subject: Threading - will threads run in parallel?
In-Reply-To: <7e9902tg2t188i2u265tg79m9tmpv70mrt@4ax.com>
References: <1141154405.709674.325760@t39g2000cwt.googlegroups.com>
	<7e9902tg2t188i2u265tg79m9tmpv70mrt@4ax.com>
Message-ID: <1141155627.666491.200290@i40g2000cwc.googlegroups.com>

Thanks!

The problem is on Windows: when I run c:\python24\myprogram.py, it has
a command window open up. If I close it, the program ends. So I want it
to run without opening that window.



From onurb at xiludom.gro  Wed Feb 15 06:50:02 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Wed, 15 Feb 2006 12:50:02 +0100
Subject: Pythonic gui format?
In-Reply-To: <1140000217.196734.46300@g14g2000cwa.googlegroups.com>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
	<dstd14$nvl$1@wake.carmen.se>
	<1140000217.196734.46300@g14g2000cwa.googlegroups.com>
Message-ID: <43f31587$0$32162$626a54ce@news.free.fr>

Gregory Petrosyan wrote:
> Bruno: in your original example, how can it be specified that image
> should be placed before text? Of course, it  *can*  be done with one
> extra level of wrapping of gui elements in list... did you mean that?

Yes. That's a pretty straightforward translation of the real Python's
object structure:

class Window(...):
  def __init__(self):
    self._widgets = []

=>

window = {
  'widgets' : [],
}

-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From iddw at hotmail.com  Thu Feb 23 18:51:46 2006
From: iddw at hotmail.com (Dave Hansen)
Date: Thu, 23 Feb 2006 17:51:46 -0600
Subject: How would you open this file?
References: <1140735212.419265.219980@e56g2000cwe.googlegroups.com>
	<43fe3a41$1_1@newspeer2.tds.net>
Message-ID: <khisv19k2gvkbiskghtvb4oe1h30ft87al@4ax.com>

On Thu, 23 Feb 2006 18:01:32 -0500 in comp.lang.python, Kent Johnson
<kent at kentsjohnson.com> wrote:

[...]
>
>filename = open_file()
>
>By the way 'filename' is a pretty bad name, since it contains a file 
>object, not a string. Maybe call it f instead. ('file' is also a bad 
>name because it is the name of a Python built-in function.)

I write a lot of simple scripts.  Those that have input and/or output
files tend to call them infile and outfile.  Given the name of the
OP's file, perhaps optfile would work for him...

Regards,
                                        -=Dave

-- 
Change is inevitable, progress is not.


From russandheather at gmail.com  Fri Feb 17 12:05:36 2006
From: russandheather at gmail.com (Russell Warren)
Date: 17 Feb 2006 09:05:36 -0800
Subject: Profiling/performance monitoring in win32
Message-ID: <1140195936.538803.97760@o13g2000cwo.googlegroups.com>

The application we're working on at my company currently has about
eleventy billion independent python applications/process running and
talking to each other on a win32 platform.  When problems crop up and
we have to drill down to figure out who is to blame and how, we
currently are using the (surprisingly useful) perfmon tool that comes
with Windows.

Perfmon does a pretty decent job, but is pretty raw and sparse on the
usability front.  Does anyone know of any alternative windows (not cpu)
profilers out there?  Commercial packages ok,  Of course one that can
introspect it's way into what a python app is doing would be a bonus
(but truthfully I'm probably just adding that last bit to make this
post a bit more appropriate for c.l.py :) ).

Thanks!



From fakeaddress at nowhere.org  Thu Feb 16 22:26:14 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Fri, 17 Feb 2006 03:26:14 GMT
Subject: %SystemDrive%
In-Reply-To: <1140078582.875226.49780@o13g2000cwo.googlegroups.com>
References: <dsvt14$rev$1@solaris.cc.vt.edu><43F37BDE.9020505@activestate.com>
	<mailman.1965.1140031059.27775.python-list@python.org>
	<dsvv5j$4dm$1@solaris.cc.vt.edu>
	<UrRIf.6602$rL5.1340@newssvr27.news.prodigy.net>
	<1140078582.875226.49780@o13g2000cwo.googlegroups.com>
Message-ID: <qnbJf.21616$_S7.8317@newssvr14.news.prodigy.com>

Atanas Banov wrote:
> Bryan Olson wrote:
> 
>>To get it with the \, you might use:
>>
>>     os.path.abspath(os.environ['SYSTEMDRIVE'])
> 
> 
> wrong!
> the result is incorrect if the current directory is different from the
> root.

Oops, sorry. I should know better than to code from what I
think I vaguely remember.


-- 
--Bryan


From scott.daniels at acm.org  Wed Feb  8 19:28:11 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Wed, 08 Feb 2006 16:28:11 -0800
Subject: UnboundMethodType and MethodType
In-Reply-To: <43ea7afe$1@nntp0.pdx.net>
References: <dsbl2g$i1b$1@news2.rz.uni-karlsruhe.de>
	<43e9635b$1@nntp0.pdx.net> <43e9f92c$1_3@newspeer2.tds.net>
	<43ea0b11$1@nntp0.pdx.net> <43ea7afe$1@nntp0.pdx.net>
Message-ID: <43ea8b63$1@nntp0.pdx.net>

Kirk McDonald wrote:
 > Scott David Daniels wrote: <an elaboration on ids and refcounts>
 >
 > You know what? That makes perfect sense. Thank you.

Thanks a lot for mentioning this.  I do try to help out, and sometimes
it feels like talking to the wind.  A thanks every now and then is
greatly appreciated.

Just for fun, you can play with:

     import sys
     sys.getrefcount(123**18)
vs.
     sys.getrefcount(12)

You should know that 'small' integers are kept and shared once built.
Similarly, some strings (including all one-character strings and strings
that might be identifiers).
     sys.getrefcount('a')
     sys.getrefcount('probably_not_really_a_variable')

--Scott David Daniels
scott.daniels at acm.org


From fredrik at pythonware.com  Wed Feb 22 05:42:19 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 22 Feb 2006 11:42:19 +0100
Subject: No
References: <1140534490.873612.64280@g47g2000cwa.googlegroups.com><1140544942.394795.240520@g47g2000cwa.googlegroups.com><mailman.2253.1140545818.27775.python-list@python.org>
	<1140551897.304048.47440@f14g2000cwb.googlegroups.com>
Message-ID: <dthf6b$f2k$1@sea.gmane.org>

Gaz wrote:

> Aye, but the file is in MY drive, not the server. Perhaps  thats the
> issue? I bet it's so... how should i deal with it? Perhaps should be a
> script that uploads the files to the server and then emails it...

assuming that the web server can read files on your local disk is perhaps
a bit too optimistic.

how did you upload your program to the server in the first place ?

any reason you cannot use the same approach to upload the image ?

</F> 





From replaceafill at yahoo.com  Mon Feb  6 19:24:34 2006
From: replaceafill at yahoo.com (Douglas Douglas)
Date: Mon, 6 Feb 2006 16:24:34 -0800 (PST)
Subject: datetime object from string
Message-ID: <20060207002434.79710.qmail@web34202.mail.mud.yahoo.com>

Hi everybody.

I need to create a datetime object from a string like "20/01/2005 15:10:01". I
know the mxDateTime module can do this with the DateTimeFrom method, but I was
wondering if is possible to do this using only the standard library.

I read the datetime object reference but didn't find a method that does it
directly.

Is it possible to do it with the standard library?

Thanks all.

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 


From johnjsal at NOSPAMgmail.com  Tue Feb 21 23:18:59 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Tue, 21 Feb 2006 23:18:59 -0500
Subject: a little more help with python server-side scripting
In-Reply-To: <1140571718.278297.105080@f14g2000cwb.googlegroups.com>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<1140571718.278297.105080@f14g2000cwb.googlegroups.com>
Message-ID: <TNidnXChVrTve2beRVn-pQ@rcn.net>

Ben Cartwright wrote:

>> The script can be given a executable mode, or permission, using the
>> chmod command:
>>
>>   $ chmod +x myscript.py
> 
> And this answers your second.  Your host needs to know the path to your
> script so they can use chmod to make it executable.

Where does this line go? Just at the top as well?


From cjw at sympatico.ca  Thu Feb 16 19:23:35 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Thu, 16 Feb 2006 19:23:35 -0500
Subject: calculating on matrix indices
In-Reply-To: <mailman.2027.1140133353.27775.python-list@python.org>
References: <mailman.2027.1140133353.27775.python-list@python.org>
Message-ID: <aI8Jf.42165$T35.666013@news20.bellglobal.com>

Brian Blais wrote:
> Hello,
> 
> In my attempt to learn python, migrating from matlab, I have the 
> following problem. Here is what I want to do, (with the wrong syntax):
> 
> from numpy import *
> 
> t=arange(0,20,.1)
> x=zeros(len(t),'f')
> 
> idx=(t>5)                # <---this produces a Boolean array, probably not what you want.
> tau=5
> x[idx]=exp(-t[idx]/tau)  # <---this line is wrong (gives a TypeError)
> 
> #------------------
> 
> what is the best way to replace the wrong line with something that 
> works: replace all of the values of x at the indices idx with 
> exp(-t/tau) for values of t at indices idx?
> 
> I do this all the time in matlab scripts, but I don't know that the 
> pythonic preferred method is.
> 
> 
> 
>             thanks,
> 
>                 bb
> 
> 
Brian,

What are you trying to do?  It is most unlikely that you need Boolean 
values in x[idx]

Colin W.



From johnjsal at NOSPAMgmail.com  Mon Feb 13 10:07:18 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 13 Feb 2006 15:07:18 GMT
Subject: how do you pronounce 'tuple'?
In-Reply-To: <F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
Message-ID: <Gg1If.1600$No6.38157@news.tufts.edu>

Erik Max Francis wrote:

> Even in mathematics, a tuple, or formally an n-tuple, makes more sense 
> to me pronounced the latter if you list out the various pronounciations 
> for large n, seems me the _uhs_ outweigh the _oos_.  (There's quadruple 
> on one side, but then quintuple, sextuple, septuple, heptuple, octuple, 
> etc., etc., etc.)

That's kind of the ironic thing. When I first saw the word, I thought 
maybe it was a Python-specific term (even something from a Monty Python 
skit, even!). My default pronunciation actually was 'toople', but then I 
looked it up to be sure and saw that it comes from words like quadruple, 
quintuple, etc. Well, even then, I was pronouncing those words in my 
head as 'quintoople', 'sextoople', etc., so that didn't really clarify 
it for me! But I think 'quintuple' is probably the more popular choice, 
which makes 'tuple' sound more correct, so to speak.

I still have a warm spot for 'toople', though, since that's what I 
called it first, but somehow 'tuple' seems less silly (and less like 
tupping!)  :)


From ilias at lazaridis.com  Tue Feb 21 06:13:38 2006
From: ilias at lazaridis.com (Ilias Lazaridis)
Date: Tue, 21 Feb 2006 13:13:38 +0200
Subject: [DICTIONARY] - Copy dictionary entries to attributes
In-Reply-To: <45p4akF7scp3U1@uni-berlin.de>
References: <dt7kv6$dcn$1@usenet.otenet.gr> <45p4akF7scp3U1@uni-berlin.de>
Message-ID: <dtesl0$87m$1@usenet.otenet.gr>

Diez B. Roggisch wrote:
> Ilias Lazaridis schrieb:
>> remark: not sure if the term "dictionary" is correct here.
>>
>> I have the following situation:
>>
>> within a setup.cfg, settings are passed this way:
>>
>> settings=project_page=theProjectPage.com
>>         myVar=myValue
>>
>> those are accessible later like this:
>>
>> settings['project_page'] / settings['myValue']
>>
>> -
>>
>> Now my question: is there any standard function to map the settings 
>> directly to attributes?
>>
>> something like:
>>
>> dictionary_make_attributes(settings)
>>
>> thus they can be accessed via:
>>
>> settings.project_page / settings.myVar
>>
>> or
>>
>> copy_dictionary_entries_to_attributes(vars, settings)
>>
>> vars.project_page / vars.myVar
> 
> Either you use __getitem__, or the "bunch"-recipe:
> 
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52308
> 
> Diez

Looks intresting, but I am a newcomer to python.

How would the __getitem__ implementation look like?

.

-- 
http://lazaridis.com


From tuvas21 at gmail.com  Tue Feb 21 17:40:49 2006
From: tuvas21 at gmail.com (Tuvas)
Date: 21 Feb 2006 14:40:49 -0800
Subject: Module question
In-Reply-To: <1140560655.407740.273490@z14g2000cwz.googlegroups.com>
References: <1140559897.172126.43820@o13g2000cwo.googlegroups.com>
	<1140560655.407740.273490@z14g2000cwz.googlegroups.com>
Message-ID: <1140561649.452528.250880@g44g2000cwa.googlegroups.com>

Could I just do this then?

from foo import x?

One more question now that I've tried this. In my main function, I have
alot of init code. I don't want this code to be re-ran when the second
module imports the first. Is there any way around this? Thanks!



From neuzhoundxx at yahoo.com  Thu Feb  9 20:35:13 2006
From: neuzhoundxx at yahoo.com (john peter)
Date: Thu, 9 Feb 2006 17:35:13 -0800 (PST)
Subject: read-only attributes
Message-ID: <20060210013513.8225.qmail@web36712.mail.mud.yahoo.com>

while reading the lib manual, i came across mentions of read-only attributes.
  for example, a method has a read-only attribute (called _im_self ?) for binding
  a class instance to the method. is such a facility available to custom application
  code? if so, what do i have to do if i want my application code to have read-only
  attributes?
  

		
---------------------------------
 
 What are the most popular cars? Find out at Yahoo! Autos 
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From fraca7 at free.fr  Tue Feb 21 10:51:40 2006
From: fraca7 at free.fr (fraca7)
Date: Tue, 21 Feb 2006 16:51:40 +0100
Subject: Mutable numbers
In-Reply-To: <43fb3665$0$3200$636a55ce@news.free.fr>
References: <dteele$9pi$1@home.itg.ti.com>	<43fb2462$0$3211$636a55ce@news.free.fr>
	<mailman.2239.1140535316.27775.python-list@python.org>
	<43fb3665$0$3200$636a55ce@news.free.fr>
Message-ID: <43fb36c0$0$3200$636a55ce@news.free.fr>

fraca7 a ?crit :
> Steve Holden a ?crit :
> 
>> [Thinks: or maybe fraca7 just meant that integers will be garbage 
>> collected when there are no more references to them].
> 
> Actually I meant that the memory is reused, but the same integer won't 
> always have the same address.

And of course this means they're garbaged collected, but free() won't be 
called. I must read before answering :)


From mwilson at the-wire.com  Mon Feb  6 16:07:21 2006
From: mwilson at the-wire.com (Mel Wilson)
Date: Mon, 06 Feb 2006 16:07:21 -0500
Subject: Question about idioms for clearing a list
In-Reply-To: <mailman.1510.1139250471.27775.python-list@python.org>
References: <mailman.1294.1138727665.27775.python-list@python.org>	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>	<mailman.1489.1139232969.27775.python-list@python.org><pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au>	<ds83kd$98m$1@sea.gmane.org>
	<mailman.1510.1139250471.27775.python-list@python.org>
Message-ID: <16ef4$43e7baea$cc0f21fa$18574@THEWIRE.CA>

Fredrik Lundh wrote:

> (del doesn't work on dictionaries)

... or rather [:] doesn't work on dictionaries ...

Python 2.4.2 (#1, Jan 23 2006, 21:24:54)
[GCC 3.3.4] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> d={'a':1, 'b':2, 'c':3}
 >>> print d
{'a': 1, 'c': 3, 'b': 2}
 >>> del d['b']
 >>> print d
{'a': 1, 'c': 3}
 >>> del d[:]
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
TypeError: unhashable type
 >>>

	Regards.	Mel.


From ian at excess.org  Thu Feb 23 15:48:15 2006
From: ian at excess.org (Ian Ward)
Date: Thu, 23 Feb 2006 15:48:15 -0500
Subject: ANN: Urwid 0.9.0 - Console UI library
In-Reply-To: <11vr5boi6b9uld7@corp.supernews.com>
References: <mailman.2177.1140462254.27775.python-list@python.org>
	<11vr5boi6b9uld7@corp.supernews.com>
Message-ID: <43FE1F8F.9080106@excess.org>

Thomas Dickey wrote:
> Ian Ward <ian at excess.org> wrote:
> 
>>  - New raw_display module that handles console display without relying
>>    on external libraries.  This module was written as a work around
>>    for the lack of UTF-8 support in the standard version of ncurses.
> 
> 
> The "standard version" of ncurses has supported UTF-8 for the past few
> years.  You may perhaps mean "default configuration", which has a
> different connotation.
> 

You're right.

I was looking for a short way of saying "a work around for lack of UTF-8 
support in the version of ncurses that Python links against by default".

Ian Ward



From tuvas21 at gmail.com  Mon Feb 20 15:22:44 2006
From: tuvas21 at gmail.com (Tuvas)
Date: 20 Feb 2006 12:22:44 -0800
Subject: Canvas clicking stuff
Message-ID: <1140466964.673708.207240@o13g2000cwo.googlegroups.com>

I have a picture that is being displayed on a canvas interface, that I
want to do the following. When a mouse button is clicked on the canvas,
I want to pass to a function the X and Y coordinates of where this
mouse button was pushed. Futhermore, and I don't know if this is
possible, I would like to have a function that passes the same data
without a mouse button being clicked, or perhaps differentiating
between left and right clicks. Thanks for the help!



From dausha at gmail.com  Sun Feb 26 21:26:45 2006
From: dausha at gmail.com (Ben Wilson)
Date: 26 Feb 2006 18:26:45 -0800
Subject: Trolling for New Web Host . . .
In-Reply-To: <mailman.2424.1140850399.27775.python-list@python.org>
References: <1140811452.070955.105180@e56g2000cwe.googlegroups.com>
	<mailman.2424.1140850399.27775.python-list@python.org>
Message-ID: <1141007205.806909.182840@p10g2000cwp.googlegroups.com>

Thanks for your suggestions. I've Python on both my Win32 and Linux
partitions of my laptop. Although, I suppose I should develop my CGI on
the laptop (running Apache) first.

Thanks,
Ben



From dickey at saltmine.radix.net  Thu Feb 23 05:59:04 2006
From: dickey at saltmine.radix.net (Thomas Dickey)
Date: Thu, 23 Feb 2006 10:59:04 -0000
Subject: ANN: Urwid 0.9.0 - Console UI library
References: <mailman.2177.1140462254.27775.python-list@python.org>
Message-ID: <11vr5boi6b9uld7@corp.supernews.com>

Ian Ward <ian at excess.org> wrote:
>   - New raw_display module that handles console display without relying
>     on external libraries.  This module was written as a work around
>     for the lack of UTF-8 support in the standard version of ncurses.

The "standard version" of ncurses has supported UTF-8 for the past few
years.  You may perhaps mean "default configuration", which has a
different connotation.

-- 
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net


From wietse.j at gmail.com  Fri Feb 10 20:57:50 2006
From: wietse.j at gmail.com (wietse)
Date: 10 Feb 2006 17:57:50 -0800
Subject: equivalent functions?
In-Reply-To: <1139622470.638044.158410@o13g2000cwo.googlegroups.com>
References: <1139621457.141754.228880@f14g2000cwb.googlegroups.com>
	<1139622470.638044.158410@o13g2000cwo.googlegroups.com>
Message-ID: <1139623070.130615.325810@f14g2000cwb.googlegroups.com>

Got it! Thanks for your time.



From steve at REMOVEMEcyber.com.au  Mon Feb 20 02:53:55 2006
From: steve at REMOVEMEcyber.com.au (Steven D'Aprano)
Date: Mon, 20 Feb 2006 18:53:55 +1100
Subject: timeit module: am I missing something obvious?
Message-ID: <43F97593.2010502@REMOVEMEcyber.com.au>

When using the timeit module, you pass the code you 
want to time as strings:

import timeit
t = timeit.Timer("foo(x, y)", \
"""from module import foo
x = 27
y = 45
""")
elapsed_time = t.timeit()

This is all very well, but it feels quite unnatural to 
me. Why am I passing strings around when functions are 
first class objects? Have I missed something obvious?

I understand that sometimes you have to pass strings, 
because statements are NOT objects in Python. But what 
about when your code doesn't use statements?

It seems to me it would be really useful to be able to 
do something like this:

# this doesn't work...
import timeit
from module import foo
x = 27
y = 45
t = timeit.Timer(foo, args=[x, y])
elapsed_time = t.timeit()

instead of messing about with setup strings and the like.

Am I missing something obvious? Does this functionality 
already exist? Is there a reason why it can't exist?



-- 
Steven.



From michele.petrazzo at TOGLIunipex.it  Sat Feb 25 05:37:00 2006
From: michele.petrazzo at TOGLIunipex.it (Michele Petrazzo)
Date: Sat, 25 Feb 2006 11:37:00 +0100
Subject: Exception not raised
In-Reply-To: <4696tkFa38olU1@uni-berlin.de>
References: <43ff3fc8$0$29105$5fc30a8@news.tiscali.it>
	<468ttdF9vr9mU1@uni-berlin.de>
	<43ff45e9$0$29105$5fc30a8@news.tiscali.it>
	<4696tkFa38olU1@uni-berlin.de>
Message-ID: <4400334c$0$29092$5fc30a8@news.tiscali.it>

Diez B. Roggisch wrote:
>> This code are inside a method into class that have no try/except. 
>> And called from a method inside a wx.Frame derivate. The other 
>> strange thing is that if I try the same code just before the 
>> "caller" to that method, it raise an exception:
> 
> So maybe the C-layer of wx in-between doesn't propagate the exception
>  for whatever reason?

Can be, but only that exception aren't raised, all the other, in the
same point of code, yes.

> Fact is: pythons exception-handling is core part of the language and 
> an error in there _extremely_ improbable .

I think the same, and this is one of the reason that push me to use python.

> So I suggest you cut down your example until it is self-contained 
> with only a few dozen lines and still produces your observed 
> behavior. Otherwise no one will be able to help you.

Into my 100 line code, that exception (and all the others) are raised! I
don't able, into all my tries, to reproduce that error on a small code...

I can publish my code, if someone has one hour of spare time and  a
postgresql where test the code. I'm make some instruction to reproduce it.

> 
> Diez

Thanks,
Michele


From steve at REMOVETHIScyber.com.au  Fri Feb 17 04:50:48 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Fri, 17 Feb 2006 20:50:48 +1100
Subject: file.read problem
References: <1140158220.388409.87650@g47g2000cwa.googlegroups.com>
	<BieJf.15428$MJ.2728@fed1read07>
	<1140159632.758960.318580@g44g2000cwa.googlegroups.com>
	<eFeJf.15429$MJ.7709@fed1read07>
	<1140164131.012482.24710@g43g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.17.09.50.48.156717@REMOVETHIScyber.com.au>

On Fri, 17 Feb 2006 00:15:31 -0800, wscrsurfdude wrote:

> 
> Farshid Lashkari wrote:
>> > I am working on a script to get parts of raw data out of a file, and
>> > the data I read has to be the data written in the file without CR or
>> > LF.
>>
>> So you just want to remove all the linefeeds? This should work then:
>>
>> data = data.replace('\n','')
>>
>> -Farshid
> 
> The problem is if I remove the linefeeds, I also delete readout data if
> it is 0x0A, and I don't want this, because the files I readout has to
> be a part of the original data. Another idea??

Er, have I understood you correctly? You seem to be saying that some
linefeeds are significant data, and some are not, and you want somebody to
tell you how to remove the insignificant "linefeed = end of line"
characters without removing the significant "linefeed = important data"
characters.

That's easy:

from blackmagic import readmymind, dowhatiwant
fp = file("data", "rb")
readmymind()
data = dowhatiwant(fp.read())

You'll need Python 3.0 for the blackmagic module.

*wink*

Seriously, if this is your problem, then you will have no choice but to
carefully analyse the file yourself, looking at each linefeed and tossing
it away if it is insignificant. We can't tell you how to do that, because
we don't know which linefeeds are data and which are not.



> But still my question is why is the:
> f = open('myfile,'r')
> a = f.read(5000)
> working in linux??

Why shouldn't it work in Linux? The question should be, why is it not
working in Windows? (When did "my code is broken" become the excepted
state of affairs, and "my code works" the mystery that needs solving?)

I wonder whether there is a ctrl-Z in your data, and Windows is
interpreting that as end of file.


-- 
Steven.



From seb.haase at gmail.com  Mon Feb 13 00:53:57 2006
From: seb.haase at gmail.com (seb.haase at gmail.com)
Date: 12 Feb 2006 21:53:57 -0800
Subject: Python 3000 deat !? Is true division ever coming ?
Message-ID: <1139810036.943598.229030@g47g2000cwa.googlegroups.com>

Hi,
Is it true that that "Python 3000" is dead ?
Honestly I think that e.g. changing 5/2  to be 2.5 (instead of 2) would
just break to much code :-(
On the otherhand I'm using Python as "Matlab replacement" and would
generally like 5/2 ==2.5

So, I was contemplating to default all my modules/scripts to start with
"from __future__ import division"
but if it is never coming (in this decade, that is)  then it would be a
waste of time just confuse everybody !!

Thanks,
Sebastian Haase



From cito at online.de  Tue Feb 14 06:42:13 2006
From: cito at online.de (Christoph Zwerschke)
Date: Tue, 14 Feb 2006 12:42:13 +0100
Subject: Splitting a string
In-Reply-To: <mailman.1883.1139903399.27775.python-list@python.org>
References: <mailman.1883.1139903399.27775.python-list@python.org>
Message-ID: <dssfmm$5kb$1@online.de>

Nico Grubert wrote:

> I'd like to split a string where 'and', 'or', 'and not' occurs.
> Example string:
> s = 'Smith, R. OR White OR Blue, T. AND Black AND Red AND NOT Green'

Here is a solution without using the re module:
s.replace(' AND NOT ', ' OR ').replace(' AND ', ' OR ').split(' OR ')

-- Christoph


From l.exsteens at gmail.com  Thu Feb  2 12:53:00 2006
From: l.exsteens at gmail.com (Laurent)
Date: 2 Feb 2006 09:53:00 -0800
Subject: my openGL API need threads!!! But how to ,ake it work???
In-Reply-To: <mailman.1357.1138901782.27775.python-list@python.org>
References: <1138901385.767694.288170@g49g2000cwa.googlegroups.com>
	<mailman.1357.1138901782.27775.python-list@python.org>
Message-ID: <1138902780.559307.245210@z14g2000cwz.googlegroups.com>

This is not a fantasm...

Why this can not work??

in a thread a loop (the glut main loop) called by Scene.run()
and in a second something else, e.g. function A

A want to add an object in the Scene, the it call
Scene.append(anObject)
and in his next step, the glutmainloop will see that there is a new
object in the list...

If we cannot do something like that, wheere is the parrallelism? What
are the advantages of threads??!!

My code is quiet simple, plz take a look. I tried to launch the
glutMainLoop in a separate thread:

threading.Thread(glutMainLoop).start()

but the execution never reach the print 'Test 2' --> the loop freeze
the program, or the program wait for start() to end...

How this can not stop at this point?



From noway at sorry.com  Tue Feb 21 03:35:41 2006
From: noway at sorry.com (Giovanni Bajo)
Date: Tue, 21 Feb 2006 08:35:41 GMT
Subject: how to break a for loop?
References: <1140476451.649515.127230@g44g2000cwa.googlegroups.com>
	<1140487935.870851.271820@g43g2000cwa.googlegroups.com>
Message-ID: <xhAKf.1202$PR2.30845@twister2.libero.it>

bonono at gmail.com wrote:

>> I need to remove zeros from
>> the begining of list, but I can't :-(.
>
> I believe the following is almost a direct translation of the above
> sentence.
>
> import itertools as it
> a=[0,0,0,1,0]
> a[:]=it.dropwhile(lambda x: x is 0, a)


Usa lambda x: x==0 or simply lambda x: x

Using 'is' relies on the interpreter reusing existing instances of the
immutable object '0', which is an implementation detail.
-- 
Giovanni Bajo




From malte.usenet at web.de  Thu Feb 23 11:35:55 2006
From: malte.usenet at web.de (Malte Dik)
Date: Thu, 23 Feb 2006 17:35:55 +0100
Subject: Get Root access in Linux?
References: <1140698762.654497.272490@o13g2000cwo.googlegroups.com>
Message-ID: <dtko4l$3ut$01$1@news.t-online.com>

quote:

> Does anyone know how to call for the root prompt before launching your
> app?
> Kinda like synaptic or the superuser file manager does?


Do you mean something like "kdesu" for KDE?


From johnjsal at NOSPAMgmail.com  Mon Feb 13 15:50:38 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 13 Feb 2006 20:50:38 GMT
Subject: installing python on a server?
In-Reply-To: <dsqmfo$oh2$1@wake.carmen.se>
References: <PB6Hf.1596$No6.37972@news.tufts.edu>
	<hntpu1pmctfaa61ns32k539nisvvljd96n@4ax.com>
	<DV6Hf.1597$No6.37987@news.tufts.edu>
	<1139610715.439681.185510@g44g2000cwa.googlegroups.com>
	<dvCdnRdmMdre43DeRVn-gw@rcn.net>
	<21bsu1dpb4nabbq04fdpubkidj23dh379j@4ax.com>
	<RuWdnViaD4SI3HPeRVn-tw@rcn.net>
	<mbssu1h9atu6i8h2o311932nbksbkmeluh@4ax.com>
	<1139706294.331711.109520@f14g2000cwb.googlegroups.com>
	<dsqmfo$oh2$1@wake.carmen.se>
Message-ID: <yi6If.1605$No6.38150@news.tufts.edu>

Magnus Lycka wrote:

> For John, it seems Karrigell, http://karrigell.sourceforge.net/
> could be a good fit.

Yes, that does seem to be something like what I'm looking for. 
Basically, I'd like to use Python inside my HTML, just as you would PHP 
and the like. But I'd prefer not to use any kind of system that requires 
anything specific only to it, and that you wouldn't normally find in 
Python (i.e., anything that might make my scripts not portable to other 
servers at a future time). I couldn't tell if this had such features or not.


From lycka at carmen.se  Sun Feb  5 16:59:10 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Sun, 05 Feb 2006 22:59:10 +0100
Subject: Learning Python
In-Reply-To: <1139159843.488988.279770@g43g2000cwa.googlegroups.com>
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
	<1139156577.897100.69140@g43g2000cwa.googlegroups.com>
	<mailman.1439.1139157505.27775.python-list@python.org>
	<1139158796.288778.244000@z14g2000cwz.googlegroups.com>
	<ds5c0n$cej$2@aphrodite.grec.isp.9tel.net>
	<1139159843.488988.279770@g43g2000cwa.googlegroups.com>
Message-ID: <ds5sfe$tla$1@wake.carmen.se>

Byte wrote:
> Yes, sorry, didnt realise diffrence between int and input. Since i'm
> such an idiot at this, any links to sites for people who need an
> unessicerily gentle learning curve?

http://wiki.python.org/moin/BeginnersGuide
http://www.honors.montana.edu/~jjc/easytut/easytut/
http://www.hetland.org/python/instant-hacking.php
http://www.byteofpython.info/


From finite.automaton at gmail.com  Thu Feb  9 12:54:19 2006
From: finite.automaton at gmail.com (Lonnie Princehouse)
Date: 9 Feb 2006 09:54:19 -0800
Subject: Finding the public callables of self
In-Reply-To: <1139506514.422801.248500@g14g2000cwa.googlegroups.com>
References: <1139501230.964886.190500@g43g2000cwa.googlegroups.com>
	<1139503421.181118.127580@o13g2000cwo.googlegroups.com>
	<1139506514.422801.248500@g14g2000cwa.googlegroups.com>
Message-ID: <1139507659.459606.60810@z14g2000cwz.googlegroups.com>

Ha!  I didn't realize that was getmembers' implementation.  What a hack
;-)

In fact, your way is faster, since getmembers is taking the time to
sort its results (presumably so that repeated calls to the same object
will yield the same list; I don't think dir has a guaranteed ordering)



From percivall at gmail.com  Mon Feb 27 01:06:59 2006
From: percivall at gmail.com (Simon Percivall)
Date: 26 Feb 2006 22:06:59 -0800
Subject: TypeError when subclassing 'list'
In-Reply-To: <1140992122.723907.263990@z34g2000cwc.googlegroups.com>
References: <1140992122.723907.263990@z34g2000cwc.googlegroups.com>
Message-ID: <1141020419.345601.141560@t39g2000cwt.googlegroups.com>

The error you're seeing is because you've rebound 'list' to something
else. Try putting "list = type([])" somewhere above your code.



From kent at kentsjohnson.com  Wed Feb 15 12:12:21 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Wed, 15 Feb 2006 12:12:21 -0500
Subject: Best way of finding terminal width/height?
In-Reply-To: <11v6kokrmpgfecc@corp.supernews.com>
References: <96nFf.43896$d5.199922@newsb.telia.net>
	<11uc3dohfitotc5@corp.supernews.com>
	<jysFf.155352$dP1.513537@newsc.telia.net>
	<11udc0r2bq11042@corp.supernews.com> <43E719EE.3040401@gmail.com>
	<11ueq4nhn91qm91@corp.supernews.com> <43E8659D.6010101@gmail.com>
	<11uhcjj2p10mm0d@corp.supernews.com> <43E8D4DD.7040904@gmail.com>
	<11uhodjciifej02@corp.supernews.com>
	<dscfcv$t5i$1@news.lysator.liu.se>
	<11uk67a4ao5efe6@corp.supernews.com>
	<dset15$hfq$1@news.lysator.liu.se>
	<11umnq61kf9m5f3@corp.supernews.com>
	<dsvd93$8g2$1@news.lysator.liu.se>
	<11v6kokrmpgfecc@corp.supernews.com>
Message-ID: <43f35c94$1_3@newspeer2.tds.net>

Grant Edwards wrote:
> I've got no complaints about the way things work, I was just
> going to suggest changing the documentation to correctly
> describe the way things work. Too mundane a solution?

Submit a patch, it's quick and easy and fun:
http://docs.python.org/about.html

Kent


From hinnc at yahoo.com  Fri Feb 10 09:50:25 2006
From: hinnc at yahoo.com (slogging_away)
Date: 10 Feb 2006 06:50:25 -0800
Subject: Too Many if Statements?
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<6e2iu1hdb8fvlfkcuulloiiq1khlbhret1@4ax.com>
	<1139517959.741090.28560@g14g2000cwa.googlegroups.com>
	<dshvb4$jfn$1@wake.carmen.se>
Message-ID: <1139583025.428875.225500@g14g2000cwa.googlegroups.com>

Magnus Lycka wrote:

> What happens if you run it from the command line instead
> of IDLE? After all, it might be some problem in IDLE involved
> here. Even if it doesn't work correctly outside IDLE, I was
> thinking that IDLE might swallow some kind of error message.

Excellent suggestion, (behold the power of the command line!).  I ran
two saved versions of the script that had produced the symptom
originally described.  The fist seemed to be caused by too many 'if'
statements, the second by adding another array, but both came up with
the same system error at the command prompt level shown here:

SystemError: com_backpatch: offset too large

This error is not produced with the IDLE console but is seen only when
executing from the command line.  I'll search around and see if I can
determine what this means and a possible fix.  Thanks for the
suggestion!



From lycka at carmen.se  Thu Feb 23 09:15:28 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Thu, 23 Feb 2006 15:15:28 +0100
Subject: Is python very slow compared to C
In-Reply-To: <1140638245.919385.84510@g47g2000cwa.googlegroups.com>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
	<1140638245.919385.84510@g47g2000cwa.googlegroups.com>
Message-ID: <dtkg20$gcf$1@wake.carmen.se>

Isaac Gouy wrote:
>>I think it is wrong to call Python "very slow" just because it is slower
>>than some other language or languages, for the same reason it would be
>>wrong to describe the population of the UK as "very low" because 60
>>million people is a smaller number than China or India's one billion plus.
>>Doing so merely reinforces the premature optimizer's message that any
>>language that isn't C (and sometimes Lisp) is "not fast enough".
> 
> There was some context: Is python very slow compared to C?

But that is a stupid context. It doesn't really tell us
anything. Slow at what?

No one writes a program for the purpose of doing loops,
comparing integers, setting up stack frames or jumping
between instructions.

The context for programming typically involves solving some
problem or executing a function that matters to the user.

It's just as database benchmarks. TPC C benchmarks tells us
how fast a certain database is at performing TPC C benchmarks.
Does that tell you anything about how fast it will be compared
to competing products for your real world problem? Probably
not. Which ever product you choose, you might end up with
situations where a particular function is too slow. You can
typically solve this either by changing the code or the
configuration of the server. Sometimes you have to rethink
your system and solve the problem in another way. Changing
from e.g. DB2 to Oracle is unlikely to have more impact than
these smaller changes. It's the same thing with most software
development.

>> The benchmark you pointed to are of limited use for application
>> developers. (Their value to language designers is another story.)
> 
> Limited use for what purpose?

They are more or less useless for anyone who wants to decide
what programming language to use in a real world situation.
It's simply stupid to implement sorting algorithms in Python.
It's there already. Solving Ackermann's is also rather far
from what people typically want to achieve. If people actually
had the time and resources to create real software products,
(i.e. things that take man-months to create) from the same
spec, and developed e.g. ten programs each each ten different
programming languages in cleanroom conditions, we'd probably
learn something useful about the usefulness of a certain type
of programs with certain programming languages in certain
conditions, but only in these conditions. I'm rather certain
that aspects such as team size, development methodology etc
will influence the relative ratings of programs.

I'm not saying that the typical toy benchmarks are completely
useless. They might tell us things about particular language
features that should be improved, or give us clues that a
certain way of solving a particular problem etc, but they
don't really help Joe Newbie Programmer who wants to write
yet another web site toolkit.


From petr at tpc.cz  Wed Feb  8 10:50:37 2006
From: petr at tpc.cz (Petr Jakes)
Date: 8 Feb 2006 07:50:37 -0800
Subject: What editor shall I use?
In-Reply-To: <1139410110.389122.215400@z14g2000cwz.googlegroups.com>
References: <1139410110.389122.215400@z14g2000cwz.googlegroups.com>
Message-ID: <1139413836.955061.243330@g47g2000cwa.googlegroups.com>

http://www.pspad.com/en/

Petr Jakes



From jure at codeshift.net  Fri Feb 24 16:12:13 2006
From: jure at codeshift.net (Jure Vrscaj)
Date: Fri, 24 Feb 2006 22:12:13 +0100
Subject: remote module importing (urlimport)
In-Reply-To: <1140801580.835062.90370@u72g2000cwu.googlegroups.com>
References: <43FE4A94.8010709@codeshift.net>	<mailman.2383.1140740895.27775.python-list@python.org>
	<1140801580.835062.90370@u72g2000cwu.googlegroups.com>
Message-ID: <43FF76AD.7070808@codeshift.net>

ajones wrote:

>What plans do you have for security in this? I would think that in
>order to trust this over the network you would at least need a
>certificate identifying the server as well as some method of verifying
>package contents.
>
>Either way, cool stuff.
>
>  
>
I'm currently fighting with recursive import problems, haven't really 
thought of security that much... I guess if this supported ssl layer 
with http and/or secure ftp, providing that you trust the machine 
hosting your modules, it would be a start (for hobby use).

regards,
jure


From kbk at shore.net  Mon Feb  6 21:45:28 2006
From: kbk at shore.net (Kurt B. Kaiser)
Date: Mon, 6 Feb 2006 21:45:28 -0500 (EST)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200602070245.k172jSGE025255@bayview.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  391 open ( +0) /  3038 closed (+10) /  3429 total (+10)
Bugs    :  915 open ( +9) /  5540 closed (+21) /  6455 total (+30)
RFE     :  209 open ( +2) /   197 closed ( +0) /   406 total ( +2)

New / Reopened Patches
______________________

difflib exceeding recursion limit  (2006-01-24)
CLOSED http://python.org/sf/1413711  opened by  Gustavo Niemeyer

Patch for bug #1380970  (2006-01-25)
       http://python.org/sf/1414934  opened by  Collin Winter

Clairify docs on reference stealing  (2006-01-26)
       http://python.org/sf/1415507  opened by  Collin Winter

optparse enable_interspersed_args disable_interspersed_args  (2006-01-26)
       http://python.org/sf/1415508  opened by  Rocky Bernstein

Configure patch for Mac OS X 10.3  (2006-01-27)
       http://python.org/sf/1416559  opened by  Ronald Oussoren

have SimpleHTTPServer return last-modified headers  (2006-01-28)
       http://python.org/sf/1417555  opened by  Aaron Swartz

Fix "be be" documentation typo in lang ref  (2006-02-01)
CLOSED http://python.org/sf/1421726  opened by  Wummel

Changes to nis module to support multiple NIS domains  (2006-02-02)
CLOSED http://python.org/sf/1422385  opened by  Ben Bell

Patches Closed
______________

difflib exceeding recursion limit  (2006-01-24)
       http://python.org/sf/1413711  closed by  niemeyer

fix bsddb test associate problems w/bsddb 4.1  (2006-01-16)
       http://python.org/sf/1407992  closed by  greg

Patch f. bug 495682 cannot handle http_proxy with user:pass@  (2005-11-05)
       http://python.org/sf/1349118  closed by  loewis

bsddb3 build problems on FreeBSD (2.4 + 2.5)  (2005-02-22)
       http://python.org/sf/1146231  closed by  greg

Add support for db 4.3  (2004-11-23)
       http://python.org/sf/1071911  closed by  nnorwitz

zipfile: use correct system type on unixy systems  (2006-01-23)
       http://python.org/sf/1412872  closed by  loewis

Fill out the functional module  (2006-01-22)
       http://python.org/sf/1412451  closed by  rhettinger

Fix "be be" documentation typo in lang ref  (2006-02-01)
       http://python.org/sf/1421726  closed by  effbot

Changes to nis module to support multiple NIS domains  (2006-02-02)
       http://python.org/sf/1422385  closed by  loewis

anonymous mmap  (2006-01-16)
       http://python.org/sf/1407135  closed by  nnorwitz

New / Reopened Bugs
___________________

Popenhangs with latest Cygwin update  (2006-01-23)
CLOSED http://python.org/sf/1413378  opened by  Eric McRae

Popened file object close hangs in latest Cygwin update  (2006-01-23)
       http://python.org/sf/1413379  opened by  Eric McRae

zipfile: inserting some filenames produces corrupt .zips  (2006-01-24)
       http://python.org/sf/1413790  opened by  Grant Olson

email.Utils.py: UnicodeError in RFC2322 header  (2006-01-25)
       http://python.org/sf/1414018  opened by  A. Sagawa

Can only install 1 of each version of Python on Windows  (2006-01-25)
CLOSED http://python.org/sf/1414612  opened by  Max M Rasmussen

Underspecified behaviour of string.split/rsplit  (2006-01-25)
       http://python.org/sf/1414673  opened by  Collin Winter

inconsistency in help(set)  (2006-01-25)
       http://python.org/sf/1414697  opened by  Gregory Petrosyan

Typo in online documentation - 6.8.3.6 Replacing popen2.*  (2006-01-26)
CLOSED http://python.org/sf/1415455  opened by  Phil Wright

Inconsistency between StringIO and cStringIO  (2006-01-27)
       http://python.org/sf/1416477  opened by  Michael Kerrin

Problem with SOAPpy on 64-bit systems  (2006-01-27)
CLOSED http://python.org/sf/1416544  opened by  Gustavo J. A. M. Carneiro

SimpleHTTPServer doesn't return last-modified headers  (2006-01-28)
       http://python.org/sf/1417554  opened by  Aaron Swartz

EditorWindow demo causes attr-error  (2006-01-29)
       http://python.org/sf/1417598  opened by  snowman

float/atof have become locale aware  (2006-01-29)
       http://python.org/sf/1417699  opened by  Bernhard Herzog

PyRun_SimpleString won't parse \\x  (2006-01-30)
CLOSED http://python.org/sf/1418374  opened by  gnupun

PyImport_AppendInittab stores pointer to parameter  (2006-01-31)
       http://python.org/sf/1419652  opened by  coder_5

class dictionary shortcircuits __getattr__  (2006-01-31)
       http://python.org/sf/1419989  opened by  Shaun Cutts

IMPORT PROBLEM: Local submodule shadows global module  (2006-02-01)
       http://python.org/sf/1421513  opened by  Jens Engel

[win32] stderr atty encoding not set  (2006-02-01)
       http://python.org/sf/1421664  opened by  Snaury

http response dictionary incomplete  (2006-02-01)
       http://python.org/sf/1421696  opened by  Jim Jewett

CVS (not SVN) mentioned in Python FAQ  (2006-02-01)
CLOSED http://python.org/sf/1421811  opened by  Gregory Petrosyan

2.4.1 mentioned in Python FAQ as most stable version  (2006-02-01)
CLOSED http://python.org/sf/1421814  opened by  Gregory Petrosyan

Inconsistency in Programming FAQ  (2006-02-01)
       http://python.org/sf/1421839  opened by  Gregory Petrosyan

email.MIME*.as_string removes duplicate spaces  (2006-02-02)
       http://python.org/sf/1422094  opened by  hads

Unicode IOError: execfile(u'\u043a\u043a\u043a/x.py')   (2006-02-02)
       http://python.org/sf/1422398  opened by  Robert Kiendl

PEP 4 additions  (2006-02-02)
       http://python.org/sf/1423073  opened by  Jim Jewett

mmap module leaks file descriptors on UNIX  (2006-02-02)
CLOSED http://python.org/sf/1423153  opened by  Fazal Majid

Email tests fail  (2006-02-04)
CLOSED http://python.org/sf/1423972  opened by  Martin v. L??wis

Assert failure in signal handling  (2006-02-04)
CLOSED http://python.org/sf/1424017  opened by  doom

The mmap module does unnecessary dup()  (2006-02-04)
CLOSED http://python.org/sf/1424041  opened by  Keith Dart

The email package needs an "application" type  (2006-02-04)
       http://python.org/sf/1424065  opened by  Keith Dart

urllib.FancyURLopener.redirect_internal looses data on POST!  (2006-02-04)
       http://python.org/sf/1424148  opened by  Robert Kiendl

urllib: HTTPS over (Squid) Proxy fails  (2006-02-04)
       http://python.org/sf/1424152  opened by  Robert Kiendl

patch for etree cdata and attr quoting  (2006-02-04)
       http://python.org/sf/1424171  opened by  Chris McDonough

os.remove OSError: [Errno 13] Permission denied  (2006-02-06)
       http://python.org/sf/1425127  opened by  cheops

msvccompiler.py modified to work with .NET 2005 on win64  (2006-02-06)
       http://python.org/sf/1425482  opened by  beaudrym

Bugs Closed
___________

Popenhangs with latest Cygwin update  (2006-01-23)
       http://python.org/sf/1413378  deleted by  sferic

__self - Watcom compiler reserved word  (2006-01-23)
       http://python.org/sf/1412837  closed by  nnorwitz

bsddb: segfault on db.associate call with Txn and large data  (2006-01-23)
       http://python.org/sf/1413192  closed by  nnorwitz

Closing dbenv first bsddb doesn't release locks &amp; segfau  (2003-08-13)
       http://python.org/sf/788526  closed by  nnorwitz

cannot handle http_proxy with user:pass@  (2001-12-21)
       http://python.org/sf/495682  closed by  loewis

BSD DB test failures for BSD DB 4.1  (2005-10-19)
       http://python.org/sf/1332873  closed by  nnorwitz

2.[345]: --with-wctype-functions 4 test failures  (2004-01-10)
       http://python.org/sf/874534  closed by  nnorwitz

posixmodule uses utimes, which is broken in glibc-2.3.2  (2003-08-10)
       http://python.org/sf/786194  closed by  nnorwitz

Error: ... ossaudiodev.c, line 48: Missing type specifier  (2005-05-05)
       http://python.org/sf/1196154  closed by  nnorwitz

Can only install 1 of each version of Python on Windows  (2006-01-25)
       http://python.org/sf/1414612  closed by  loewis

Typo in online documentation - 6.8.3.6 Replacing popen2.*  (2006-01-26)
       http://python.org/sf/1415455  closed by  nnorwitz

Problem with SOAPpy on 64-bit systems  (2006-01-27)
       http://python.org/sf/1416544  closed by  loewis

PyRun_SimpleString won't parse \\x  (2006-01-30)
       http://python.org/sf/1418374  deleted by  effbot

Registry key CurrentVersion not set  (2003-10-22)
       http://python.org/sf/827963  closed by  loewis

CVS (not SVN) mentioned in Python FAQ  (2006-02-01)
       http://python.org/sf/1421811  closed by  loewis

2.4.1 mentioned in Python FAQ as most stable version  (2006-02-01)
       http://python.org/sf/1421814  closed by  loewis

urllib2 doesn't do HTTP-EQUIV &amp; Refresh  (2002-10-21)
       http://python.org/sf/626543  closed by  jjlee

urllib2 dont respect debuglevel in httplib  (2005-02-27)
       http://python.org/sf/1152723  closed by  abbatini

TimedRotatingFileHandler midnight rollover time increases  (01/04/06)
       http://python.org/sf/1396622  closed by  sf-robot

mmap module leaks file descriptors on UNIX  (2006-02-02)
       http://python.org/sf/1423153  closed by  nnorwitz

Email tests fail  (2006-02-04)
       http://python.org/sf/1423972  closed by  bwarsaw

Assert failure in signal handling  (2006-02-04)
       http://python.org/sf/1424017  closed by  nnorwitz

The mmap module does unnecessary dup()  (2006-02-04)
       http://python.org/sf/1424041  closed by  nnorwitz

r41552 broke test_file on OS X  (2005-12-04)
       http://python.org/sf/1373161  closed by  nnorwitz

New / Reopened RFE
__________________

lib-deprecated  (2006-02-02)
       http://python.org/sf/1423082  opened by  Jim Jewett

Support for MSVC 7 and MSVC8 in msvccompiler  (2006-02-06)
       http://python.org/sf/1425256  opened by  dlm



From cjw at sympatico.ca  Tue Feb  7 11:41:51 2006
From: cjw at sympatico.ca (Colin J. Williams)
Date: Tue, 07 Feb 2006 11:41:51 -0500
Subject: Is the Python types module superfluous?
In-Reply-To: <43E13502.6050207@ee.byu.edu>
References: <FA65AA19114FF14081CFF548A3308C8303EE294A@mail-1a.nrel.gov>	<43DFD598.5000503@colorado.edu>	<43E0309D.5050700@sympatico.ca>	<43E03349.10208@ieee.org>	<43E0DE8D.6020907@sympatico.ca>
	<20060201181434.0cbb368a.gerard.vermeulen@grenoble.cnrs.fr>
	<43E13502.6050207@ee.byu.edu>
Message-ID: <43E8CDCF.10303@sympatico.ca>

Travis Oliphant wrote:

> Gerard Vermeulen wrote:
>
>> On Wed, 01 Feb 2006 11:15:09 -0500
>> "Colin J. Williams" <cjw at sympatico.ca> wrote:
>>
>> [ currently numpy uses ndarray, with synonym ArrayType, for a 
>> multidimensional array ]
>>
>>  
>>
>>> [Dbg]>>> import types
>>> [Dbg]>>> dir(types)
>>> ['BooleanType', 'BufferType', 'BuiltinFunctionType',
>>> 'BuiltinMethodType', 'ClassType', 'CodeType', 'ComplexType',
>>> 'DictProxyType', 'DictType', 'DictionaryType', 'EllipsisType',
>>> 'FileType', 'FloatType', 'FrameType', 'FunctionType', 'GeneratorType',
>>> 'Instance
>>> Type', 'IntType', 'LambdaType', 'ListType', 'LongType', 'MethodType',
>>> 'ModuleType', 'NoneType', 'NotImplementedType', 'ObjectType',
>>> 'SliceType', 'StringType', 'StringTypes', 'TracebackType', 'TupleType',
>>> 'TypeType', 'UnboundMethodType', 'UnicodeType', 'XRan
>>> geType', '__builtins__', '__doc__', '__file__', '__name__']
>>> [Dbg]>>>
>>>
>>>   
>>
>>
>> Isn't the types module becoming superfluous?
>>
>>  
>>
> That's the point I was trying to make.  ArrayType is to ndarray as 
> DictionaryType is to dict.  My understanding is that the use of 
> types.DictionaryType is discouraged.
>
> -Travis
>
I was simply trying to suggest that the name ArrayType is more
appropriate name that ndbigarray or ndarray for the multidimensional
array.  Since the intent is, in the long run, to integrate numpy with
the Python distribution, the use of a name in the style of the existing
Python types would appear to be better.

Is the types module becoming superfluous?  I've cross posted to c.l.p to
seek information on this.

Colin W.


From jack at performancedrivers.com  Thu Feb  9 19:57:25 2006
From: jack at performancedrivers.com (Jack Diederich)
Date: Thu, 9 Feb 2006 19:57:25 -0500
Subject: Pulling all n-sized combinations from a list
In-Reply-To: <1139527518.210792.3420@g14g2000cwa.googlegroups.com>
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>
	<mailman.1668.1139501162.27775.python-list@python.org>
	<1139509392.890581.94470@g43g2000cwa.googlegroups.com>
	<mailman.1676.1139512284.27775.python-list@python.org>
	<1139527518.210792.3420@g14g2000cwa.googlegroups.com>
Message-ID: <20060210005725.GJ5942@performancedrivers.com>

liberally snipped out parts
On Thu, Feb 09, 2006 at 03:25:18PM -0800, mensanator at aol.com wrote:
> Jack Diederich wrote:
> > > > On Wed, Feb 08, 2006 at 12:50:19PM -0800, Swroteb wrote:
> > > > >
> > > > > I've got a reasonably sized list of objects that I'd like to pull out
> > > > > all combinations of five elements from.  Right now I have a way to do
> > > > > this that's quite slow, but manageable.  I know there must be a better
> > > > > way to do this, but I'm not sure what it is.  Here's what I've got so
> > > > > far:
> > > >
> > > > import probstat # http://probstat.sourceforge.net
> > > > for (a, b, c) in probstat.Combination(range(9), 3): # 0..9, pick 3
> > > >   print a, b, c
> > > >
>
> so I put together a little test program to see how probstat
> compares. Correspondence to my emulations is (as far as I can tell)
> 
>
> def p_perm(a,n):
>         A = list(a)
>         t0 = time.time()
>         if len(A)<n:
>             c = probstat.Permutation(A,n)
>         else:
>             c = probstat.Permutation(A)
>         print time.time()-t0
>         p = []
>         for i in c:
>             p.append(''.join(i))
>         return p

This never calls the A choose n branch because len(A) is always
bigger than n.

> print 'permutation w/o replacemment "abcdefghijklmnopqrstuvwxyz":4'
> t0 = time.time()
> p = p_perm("abcdefghijklmnopqrstuvwxyz", 4)
> t1 = time.time()
> print len(p),'4-letter words',t1-t0,'seconds'
> 
> Unfortunately, the long test died (out of virtual memory) executing
> the probstat.Permution test.
> 

>>> import probstat
>>> p = probstat.Permutation(range(25))
>>> len(p)
2076180480
>>> p = probstat.Permutation(range(26))
>>> len(p)
-1853882368
>>> 

Overflow error.  I'll have to add a test that raises a ValueError
for lists that are too big.

The following simple loop takes three minutes to run on my laptop
import probstat
count_to = len(probstat(range(12))) # just computes the size
cnt = 0
while cnt < count_to:
  cnt += 1

So a permutation of all arrangements of the alphabet would take
rougly forever.

-Jack


From mikeisgreat at gmail.com  Thu Feb  2 20:47:21 2006
From: mikeisgreat at gmail.com (mikeisgreat at gmail.com)
Date: 2 Feb 2006 17:47:21 -0800
Subject: learning python, using string help
In-Reply-To: <1138925622.456566.133860@g47g2000cwa.googlegroups.com>
References: <1138906062.727850.177960@g14g2000cwa.googlegroups.com>
	<fwsEf.24314$1%5.18129@tornado.texas.rr.com>
	<1138909296.301962.16230@z14g2000cwz.googlegroups.com>
	<Pine.LNX.4.62.0602022221500.8737@urchin.earth.li>
	<1138925622.456566.133860@g47g2000cwa.googlegroups.com>
Message-ID: <1138931241.386430.234550@f14g2000cwb.googlegroups.com>

Tom, the script you referenced me errored ... But I will see if I can
get it working.



From lycka at carmen.se  Fri Feb 10 07:08:58 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 10 Feb 2006 13:08:58 +0100
Subject: Pulling all n-sized combinations from a list
In-Reply-To: <1139527129.367077.316590@g44g2000cwa.googlegroups.com>
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>
	<1139509392.890581.94470@g43g2000cwa.googlegroups.com>
	<mailman.1675.1139510184.27775.python-list@python.org>
	<1139513265.440321.184530@o13g2000cwo.googlegroups.com>
	<dsg601$ndh$1@wake.carmen.se>
	<1139527129.367077.316590@g44g2000cwa.googlegroups.com>
Message-ID: <dshvoq$ksm$1@wake.carmen.se>

mensanator at aol.com wrote:
> But using the free SDK compiler from MS? That seems elusive.

Have you seen this?
http://www.vrplumber.com/programming/mstoolkit/


From martin at v.loewis.de  Tue Feb  7 17:44:32 2006
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Tue, 07 Feb 2006 23:44:32 +0100
Subject: Python 2.4.2 using msvcrt71.dll on Win and compatibility issues
In-Reply-To: <dsb2nn$5qs$1@online.de>
References: <dsaqcf$jb5$1@online.de> <43E8F864.6050605@v.loewis.de>
	<dsb2nn$5qs$1@online.de>
Message-ID: <43E922D0.4080407@v.loewis.de>

Christoph Zwerschke wrote:
>> So here is another strategy: flush the stream before going
>> into postgres, then obtain the fileno() of the stream, and
>> fdopen it with postgres' iostreams library. That might also
>> be tricky to implement, but could work.
> 
> 
> I understand what you mean. But the Postgres dll provides no means to
> fdopen a new stream.

Right. So you must do so in the pygresql module. That means you have
to get hold of msvcrt.dll's (sic) fdopen implementation.

One way to do so would be through linking pygresql to msvcrt.dll,
instead of linking it to msvcr71.dll. That should be only done if
it is certain that there won't be any other resource sharing with
Python (no malloc, no locale, no stdio - see "some" mskb article
for the precise list of restrictions). I would expect that no
such resource sharing happens, but one would have to verify the code
to be certain.

The other option is to use GetProcAddress to obtain the address of
fdopen.

Regards,
Martin


From NOktiltonSPAM at nyc.rr.com  Tue Feb 14 18:59:19 2006
From: NOktiltonSPAM at nyc.rr.com (Kenny Tilton)
Date: Tue, 14 Feb 2006 23:59:19 GMT
Subject: Xah's Edu Corner: accountability & lying thru the teeth
In-Reply-To: <45dmspF66tepU1@individual.net>
References: <1133844932.007824.26780@g43g2000cwa.googlegroups.com>
	<1134780763.066592.45390@g49g2000cwa.googlegroups.com>
	<1135405908.381150.133190@o13g2000cwo.googlegroups.com>
	<1136236586.734775.212440@f14g2000cwb.googlegroups.com>
	<1137784561.589887.58380@o13g2000cwo.googlegroups.com>
	<1139909629.798938.284160@g47g2000cwa.googlegroups.com>
	<45dmspF66tepU1@individual.net>
Message-ID: <r9uIf.8084$lG2.2039@news-wrt-01.rdc-nyc.rr.com>

Ulrich Hobelmann wrote:
> Xah Lee wrote:
> 
>> here's a site: http://www.longbets.org/bets that takes socially
>> important predictions. I might have to enter one or two.
>>
>> i longed for such a accountable predictions for a long time. Usually,
>> some fucking fart will do predictions, but the problem is that it's not
> 
> [...]
> 
> OMG, he's back.
> 
> I predict, Xah will haunt us for years to come.
> 

WTF is wrong with Xah? He posts an occasional article in good faith and 
leaves it at that. ignoring the insults that follow.

In the end we have one good-faith article and a bunch of personal 
attacks from a Usenet chorus of self-appointed finger-shakers creating 
more pollution than he ever did.

If only some of the people castigating Xah for daring to use Usenet 
would post as rarely as he, and show as much restraint.

ken


From exarkun at divmod.com  Thu Feb 16 12:44:25 2006
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 16 Feb 2006 12:44:25 -0500
Subject: Safe Python Execution
In-Reply-To: <1haudyd.10d1fd6nn4pqhN%aleaxit@yahoo.com>
Message-ID: <20060216174425.6122.507727179.divmod.quotient.701@ohm>

On Thu, 16 Feb 2006 07:59:03 -0800, Alex Martelli <aleaxit at yahoo.com> wrote:
>Graham <graham.abbott at gmail.com> wrote:
>
>> I've been messing around with trying to get a small sandbox like
>> environment where i could execute python code in a "safe" way.
>> Basically what the old restricted execution module attempted to do.
>> I've written a small amount of code to get custom interpreter running,
>> but i'm not really sure if its safe.
>>
>> The way i'm controlling functionality is with some games and exec, so
>> if 'code' was the text code you wanted to execute i run:
>>
>> exec code in {'__builtins__':None"}
>>
>> obviously this doesn't give you much to play with, but it does remove
>> file access and importing as far as i can tell. Can anyone think of a
>> hack around this? I assume if it was this easy it would be a module
>> already but i figured i would ask.
>
>I suggest compiling the code and examining the names used in the code
>object (co_names attribute of the code object which compile returns) --
>refuse to execute the code if it mentions, defines or uses any special
>name (starting and ending with two underscores).  That, plus removing
>almost all builtins as you do here, should be a good start.

A good start, perhaps, but still in need of a good finish.

    """
    exec 'print ' + ''.join(map(chr, [
        95, 95, 98, 117, 105, 108, 116, 105, 110, 115, 95, 95]))
    """

You can come up with a long list of restrictions to impose, and maybe that will be good enough.  But making it /perfect/ is a Herculean task, as is maintaining it as new Python releases are made, and auditing it every time you add a new piece of code to your system.

Just keep that in mind if you decide to pursue this.

Jean-Paul


From gwill at wirelesstcp.net  Wed Feb 22 18:09:05 2006
From: gwill at wirelesstcp.net (george williams)
Date: Wed, 22 Feb 2006 15:09:05 -0800
Subject: pyFltk-1.1
References: <1140617661.603681.12250@z14g2000cwz.googlegroups.com>
Message-ID: <001101c63804$fa421fe0$c9b6d5cf@george0r1rrt3p>

By god this sounds interesting I wish I 
knew what you are talking about
George-- Original Message ----- 
From: "andreas" <a.held at computer.org>
Newsgroups: comp.lang.python.announce
To: <comp-lang-python-announce at moderators.isc.org>
Sent: Wednesday, February 22, 2006 6:14 AM
Subject: ANN: pyFltk-1.1


> This is to announce the first official release of pyFltk-1.1,
> the Python bindings for the cross platform GUI toolkit fltk-1.1
> 
> This release candidate has been tested with fltk-1.1.7
> and requires Python2.4.
> pyFltk is a lighweight, easy-to-use GUI toolkit for Python. It
> can be used where simplicity, speed, small footprint, and ease-of-use
> are
> important.
> Changes:
>     * Now it is possible to extend all widgets in Python
>     * Fl_Preferences has been added.
>     * Various bug fixes
>     * Faster dispatch (thanks to SWIG)
>     * Improved stability
>     * Added port of FLTK sudoku program
> A source distribution, a Windows installer, and a Linux binary
> (including fltk) can be
> downloaded from http://pyfltk.sourceforge.net.
> 
> Regards
> 
> Andreas Held
> http://pyfltk.sourceforge.net
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-announce-list
> 
>         Support the Python Software Foundation:
>         http://www.python.org/psf/donations.html
> 
> 
> -- 
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.1.375 / Virus Database: 268.0.0/267 - Release Date: 2/22/2006
> 


From blair.houghton at gmail.com  Thu Feb  2 11:47:10 2006
From: blair.houghton at gmail.com (Blair P. Houghton)
Date: 2 Feb 2006 08:47:10 -0800
Subject: webbrowser module + urls ending in .py = a security hole?
In-Reply-To: <1138898232.726612.204160@o13g2000cwo.googlegroups.com>
References: <1138593557.824516.116400@g14g2000cwa.googlegroups.com>
	<1138626217.999480.153140@g43g2000cwa.googlegroups.com>
	<1138651762.673682.192210@g43g2000cwa.googlegroups.com>
	<drluph$nfj$1@sea.gmane.org>
	<mailman.1244.1138656764.27775.python-list@python.org>
	<1138898232.726612.204160@o13g2000cwo.googlegroups.com>
Message-ID: <1138898830.293818.121130@g49g2000cwa.googlegroups.com>


Blair P. Houghton wrote:
> Which makes it no security hole at
> all, it would seem...

Well, no, that's a little strong.  No *new* security hole, maybe.  It
would be on the order of having ./ in the PATH for root, and getting
trapped by a hacker who named his rootkit "ls" or "pwd".  I.e., it puts
the onus on the caller user of determining what file is really being
accessed and what's really in it before it's ever opened for default
action.

So it's an insecurity that produces an annoyance that maybe could be
handled by the webbrowser.py module...

--Blair



From mark at mark-fink.de  Tue Feb 21 16:23:36 2006
From: mark at mark-fink.de (Mark Fink)
Date: 21 Feb 2006 13:23:36 -0800
Subject: Jython Pythonpath question
Message-ID: <1140557016.254542.254580@g44g2000cwa.googlegroups.com>

Hi there,

I have a source file FailFixture.py in the folder
D:\AUT_TEST\workspace\JyFIT\testutil. Now I want to import the file
with "import testutil.FailFixture". Unfortunately I could not figure
out how to set this up. I am convinced that
"D:\AUT_TEST\workspace\JyFIT" should be included in the pythonpath but
it does not work. Nor does it work to include this path in the java
classpath. Any idea whats wrong?

I experiented a little at the Jython prompt:

D:\AUT_TEST>java -Dpython.home=D:\AUT_TEST\Jython21
-Dpython.path=D:\AUT_TEST\workspace\JyFIT -classpath
D:\AUT_TEST\Jython21\jython.jar;D:\AUT_TEST\JavaLib\log4j-1.2.13.jar;D:\AUT_TEST\workspace\JyFIT
org.python.util.jython

Jython 2.1 on java1.5.0_06 (JIT: null)
Type "copyright", "credits" or "license" for more information.
>>> import testutil.FailFixture
Traceback (innermost last):
  File "<console>", line 1, in ?
ImportError: No module named FailFixture
>>> ^Z



From apardon at forel.vub.ac.be  Wed Feb 22 04:07:12 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 22 Feb 2006 09:07:12 GMT
Subject: number ranges
References: <e86a5fd00602131854s73191cbbu742d4434ad074908@mail.gmail.com>
	<1139945386.3346.38.camel@pc1.cole.uklinux.net>
	<43F8D881.5030804@sympatico.ca>
	<gfmdnZrrLeHK22TenZ2dnUVZ_tCdnZ2d@comcast.com>
	<43F97AA8.50005@REMOVEMEcyber.com.au>
	<3_WdnUP9qr9XRmTenZ2dnUVZ_sydnZ2d@comcast.com>
	<1hb1umb.wr2hsk1chby86N%aleaxit@yahoo.com>
	<NMuKf.5613$%14.252734@news20.bellglobal.com>
	<1hb2uq1.e7kdkt1z0ge4rN%aleaxit@yahoo.com>
	<43FAD679.2040305@REMOVEMEcyber.com.au>
	<1hb3o4u.trzcp41f11vxqN%aleaxit@yahoo.com>
	<7xacckifpd.fsf@ruckus.brouhaha.com>
	<mailman.2268.1140559850.27775.python-list@python.org>
Message-ID: <slrndvoae0.95h.apardon@rcpc42.vub.ac.be>

Op 2006-02-21, Tim Hochberg schreef <tim.hochberg at ieee.org>:
>
> [Lots of proposals snipped]
>
> 90% of my gripes with range disappeared with the addition of enumerate. 
> However, if there's going to be another round of range literal proposals 
> I might as well throw out what seems (to me anyway) like the only 
> halfway obvious choice in the context of Python.
>
> 1. a:b:c is equivalent to slice(a,b,c) with the usual rules that missing 
> values are mapped to None: Parentheses would be required where this 
> construct would otherwise be ambiguous.

I think this would be the way to go if want a chance of having it in
python 2.x.

However I would think that a Bottom and Top value (respectively being
smaller and larger than all other objects) would be better suited as
default values for python 3000

> 2. slice(a,b,c) grows an __iter__ method that returns a generator that 
> produces an appropriate sequence of integers. This is easy to define for 
> positive steps, but tricky for negative steps (more on that in a second).
>
> Thus:
>
> for i in (1::2): print i,
>=> 1 3 5 ...
>
> and
>
> for i in (:10:3): print i,
>=> 0 3 6 9
>
>
> The tricky part is deciding what to with negative steps when the start 
> is undefined. It's tempting to use 0 as the start, but I think -1 is 
> actually better if slightly odd. The reason is that I think the 
> following invariant should hold.

In python 2.x I would either throw an exception or continuely return
None if the start value isn't given.

For python 3000 I would continously return Bottom or Top if the start
value wasn't given, depending on step being positive or negative.

-- 
Antoon Pardon


From bignose+hates-spam at benfinney.id.au  Sat Feb 18 17:24:08 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 19 Feb 2006 09:24:08 +1100
Subject: Tab Character?
References: <1140298494.225985.103510@g47g2000cwa.googlegroups.com>
Message-ID: <87slqgb913.fsf@rose.polar.local>

"tbonejo at gmail.com" <tbonejo at gmail.com> writes:
> How do I make a tab character in code to split a line read with tabs in
> it?

For such non-printing characters it's best not to have them literally
in your code, but to use an escape sequence to generate them at
run-time::

    >>> foo = "\t"
    >>> print foo

    >>> print ord(foo)
    9

This is explained in the "String literals" section of the Python
reference.

    <URL:http://docs.python.org/dev/ref/strings.html>

-- 
 \       "A celebrity is one who is known by many people he is glad he |
  `\                               doesn't know."  -- Henry L. Mencken |
_o__)                                                                  |
Ben Finney


From singletoned at gmail.com  Tue Feb  7 17:06:44 2006
From: singletoned at gmail.com (Ed Singleton)
Date: Tue, 7 Feb 2006 22:06:44 +0000
Subject: Question about idioms for clearing a list
In-Reply-To: <1139332464.076140.164220@g43g2000cwa.googlegroups.com>
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<ds83kd$98m$1@sea.gmane.org> <43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>
	<1139306562.105655.23200@f14g2000cwb.googlegroups.com>
	<mailman.1548.1139321341.27775.python-list@python.org>
	<1139332464.076140.164220@g43g2000cwa.googlegroups.com>
Message-ID: <34bb7f5b0602071406m228105b8y@mail.gmail.com>

On 07/02/06, Raymond Hettinger <python at rcn.com> wrote:
> > Again we unfortunately have a bit of an attitude problem
> > > towards anyone posting here that doesn't know whatever the experts
> > > think is obvious.
> >
> > I agree wholeheartedly with this, particularly as there often seems to
> > be strong (and confusing) resistance to making Python easier and more
> > obvious.
>
> That is B.S.
>
> We simply disagree on whether list.clear() is an improvement.  Adding a
> non-essential method to an important API does not make the language
t > easier to learn or use.

Yes it does.  It makes it a lot easier to learn.  Even list.del()
would be a massive improvement.

> Also, it doesn't address the wider issue that
> learning about slices is important for understanding the language (it
> appears in many guises).  Likewise, learning about the del-statement is
> somewhat essential for people setting out to mutate collections
> in-place. You're not helping someone if you steer them away from
> learning the basics.

Maybe it's better to put the basics in a place that they will find
them, rather than trying to steer them.  Manipulating the language is
hell of a lot easier than manipulating every user.

Languages are only there for people to use therefore I'm going to go
out on a limb and say that they should be designed for people to use.

> >  I can only assume that it is by people who have forgotten
> > what it is like to be an average programmer.
>
> More B.S.
>
> My thoughts on the issue are informed by several years of answering
> average programmer questions on the python-help list.  In that time,
> the question of how to clear a list has never come up.  There are
> several areas of recurring confusion but this isn't one of them.
> You're mud-slinging over a non-issue.

My thoughts on the issue are informed by many years of being an
average programmer and knowing and working with lots of average
programmers (and well below average programmers for that matter)

I'm not mud-slinging, I'm just saying that people are very dismissive
of making the language easier to use for newbies.

Ed


From cdc at maxnet.co.nz  Mon Feb 13 21:33:51 2006
From: cdc at maxnet.co.nz (Carl Cerecke)
Date: Tue, 14 Feb 2006 15:33:51 +1300
Subject: Loop Backwards
In-Reply-To: <1139883877.323042.199040@o13g2000cwo.googlegroups.com>
References: <1139883877.323042.199040@o13g2000cwo.googlegroups.com>
Message-ID: <43f14190@usenet01.boi.hp.com>

Dave wrote:
> This should be simple, but I can't get it:
> 
> How do you loop backwards through a list?
> 
> For example, in, say, Javascript:
> 
> for (var i  = list.length - 1; i >=0; i--) {
>     do_stuff()
> }
> 
> I mean, I could reverse the list, but I don't want to. I want it to
> stay exactly the same, but I want to start at the end and end at the
> beginning.
> 
> Thanks!
> 
> - Dave
> 

for i in reversed(ls):
     do_stuff()

reversed doesn't reverse the list. It returns an iterator that iterates 
through the list backwards.

Cheers,
Carl.


From eddie at holyrood.ed.ac.uk  Thu Feb  9 06:07:55 2006
From: eddie at holyrood.ed.ac.uk (Eddie Corns)
Date: Thu, 9 Feb 2006 11:07:55 +0000 (UTC)
Subject: Twisted book opinions?
References: <mailman.1638.1139452774.27775.python-list@python.org>
Message-ID: <dsf7qb$2rl$1@scotsman.ed.ac.uk>

Jay Parlar <jparlar at cogeco.ca> writes:

>I was hoping to get some c.l.p. opinions on O'Reilly's new Twisted book.

Well I certainly felt that I understood it better after reading the book.
OTOH I haven't tried to put that knowledge into practice yet.

I think calling it a cookbook is misleading, it shows how to do essential
tasks using fairly complete examples.

Eddie


From ian at excess.org  Wed Feb  8 13:11:07 2006
From: ian at excess.org (Ian Ward)
Date: Wed, 08 Feb 2006 13:11:07 -0500
Subject: Replacing curses (Was: Re: Problem with curses and UTF-8)
In-Reply-To: <11uk55h47lruk18@corp.supernews.com>
References: <mailman.1566.1139345769.27775.python-list@python.org>
	<43E9234B.6030108@v.loewis.de>
	<mailman.1588.1139372460.27775.python-list@python.org>
	<11uk55h47lruk18@corp.supernews.com>
Message-ID: <43EA343B.9030702@excess.org>

Grant Edwards wrote:
> Why not use termcap/terminfo?

That's a good idea, but I'd have to wrap the c library myself, wouldn't 
I?  Also, what happens when a user has an incorrect TERM setting (I've 
run into this before)

I don't want to reimpliment all the nice speed optimizations that the 
curses library has, I just want something simple that should work for as 
many people as possible.

Ian Ward



From jeffhg582003 at yahoo.com  Wed Feb  8 21:08:08 2006
From: jeffhg582003 at yahoo.com (jeffhg582003)
Date: Thu, 09 Feb 2006 02:08:08 -0000
Subject: Inserting record with Microsoft Access
Message-ID: <dse868+n819@eGroups.com>

Hi,

I am developing a python script which add records to 
a microsoft access tables. All my tables have autogenerated number
fields. I am trying to capture the number generated from the insert but
I am not exactly sure how to do that after an insert.

Thanks,
Jeff





From hancock at anansispaceworks.com  Fri Feb  3 01:17:40 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Fri, 3 Feb 2006 00:17:40 -0600
Subject: Calling a string as a function.
In-Reply-To: <002601c62880$236e3d70$6400a8c0@D1FWTS61>
References: <002601c62880$236e3d70$6400a8c0@D1FWTS61>
Message-ID: <20060203001740.33407959@samwise.anansi>

On Thu, 2 Feb 2006 22:10:22 -0700
<brandon.mcginty at gmail.com> wrote:
> I'm completely new to python, so sorry for my ignorence.
> How does one go about converting a string, for instants
> one received through tcp, into something that can be
> called as a function? I'm trying to have what the user
> sends to the computer through the network, run as a
> function. If the user sends "motd", the function motd will
> be run inside the script. Thanks Much,

Look for "exec" and "eval" in the documentation.

BUT, I hope you know this is a security NIGHTMARE!

Truly evil things could be sent to you in those strings,
such as, for example:

"import os; os.system('cd \; rm -r *')"

or something like that.

It might be smarter to use a dictionary of a *limited*
number of options and just call functions based on the keys
given:

func_table = {	'motd':motd,	}

then you can call

func_table['motd']()

and its the same as

motd()

Whatever motd() is.

Cheers,
Terry


-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From tim.peters at gmail.com  Wed Feb  8 14:01:00 2006
From: tim.peters at gmail.com (Tim Peters)
Date: Wed, 8 Feb 2006 14:01:00 -0500
Subject: os.walk() dirs and files
In-Reply-To: <dscrjr$joa$1@solaris.cc.vt.edu>
References: <dscrjr$joa$1@solaris.cc.vt.edu>
Message-ID: <1f7befae0602081101n2b3833c4uaeaa1b0cfc4e3f64@mail.gmail.com>

[rtilley]
> When working with file and dir info recursively on Windows XP. I'm going
> about it like this:
>
> for root, dirs, files in os.walk(path):
>      for f in files:
>          ADD F to dictionary
>      for d in dirs:
>          ADD D to dictionary
>
> Is it possible to do something such as this:
>
> for root, dirs, files in os.walk(path):
>      for f,d in files, dirs:
>          ADD F|D to dictionary
>
> Just trying to save some lines of code and thought it wise to ask the
> gurus before trying it :)

As has been pointed out,

    for name in dirs + files:

is simple and effective.  In a context where you don't want to endure
the memory burden of materializing a concatentated list, you can do

    for name in itertools.chain(dirs, files):

intead.


From carsten at uniqsys.com  Fri Feb 24 09:31:17 2006
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 24 Feb 2006 09:31:17 -0500
Subject: problem(s) with import from parent dir: "from ../brave.py
	import sir_robin"
In-Reply-To: <1140790231.071029.236550@i40g2000cwc.googlegroups.com>
References: <1140786637.451247.16210@e56g2000cwe.googlegroups.com>
	<mailman.2396.1140788093.27775.python-list@python.org>
	<1140790231.071029.236550@i40g2000cwc.googlegroups.com>
Message-ID: <1140791477.19750.30.camel@dot.uniqsys.com>

On Fri, 2006-02-24 at 09:10, per9000 wrote:
> Thanks,
> 
> I added an environment variable PYTHONPATH and added the holy folder
> with my script in. Works just perfectly.
> 
> But still: is there a way around this? (It is a lot easier to add
> "../../" in my code than make everyone else add this variable).

Yes.

>From http://docs.python.org/tut/node8.html#SECTION008110000000000000000:
"""
Actually, modules are searched in the list of directories given by the
variable sys.path [...]. This allows Python programs that know what
they're doing to modify or replace the module search path.
"""

In other words, your script may simply append other module locations
such as "../.." to sys.path.

-Carsten.




From fakeaddress at nowhere.org  Tue Feb  7 17:09:42 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Tue, 07 Feb 2006 22:09:42 GMT
Subject: Too Many if Statements?
In-Reply-To: <dsaqkj$jhm$1@xenon.Stanford.EDU>
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<dsaqkj$jhm$1@xenon.Stanford.EDU>
Message-ID: <GU8Gf.22899$Jd.6095@newssvr25.news.prodigy.net>

Alan Morgan wrote:
> slogging_away wrote:
> 
>>Hi - I'm running Python 2.4.2 (#67, Sep 28 2005, 12:41:11) [MSC v.1310
>>32 bit (Intel)] on win32, and have a script that makes numerous checks
>>on text files, (configuration files), so discrepancies can be reported.
>>The script works fine but it appears that I may have hit a wall with
>>'if' statements.
>>
>>Due to the number of checks perfromed by the script on the text files,
>>(over 500), there are quite a few 'if' statements in the script, (over
>>1150).  It seems that it is at the point that when I add any additional
>>'if' statements the script will not run.  No error is produced - it
>>just returns to the python prompt much the same as when a successful
>>'Check Module' command is selected.  If I delete some other 'if'
>>statements the new ones work so it appears that it has hit a limit on
>>the number of 'if' statements.  This has stunted any further checks for
>>the script to make on the text files.
>>
>>Hs anyone ever run into this sort of thing?
> 
> 
> I generated files with 10000, 25000, and 50000 simple if statements and ran
> them.  10000 was okay, 25000 gave a bizarre internal error, and 50000 segfaulted
> and died.  My system has plenty of memory and it isn't obvious to me why python
> should be so bothered about this.  I'm not sure why I can have 10x the number of
> if statements that cause you trouble.  There might be some overall limitation
> on the number of statements in a file.

I made a script with 100,000 if's, (code below) and it appears
to work on a couple systems, including Python 2.4.2 on Win32-XP.
So at first cut, it doesn't seem to be just the if-count that
triggers the bug.

Code that does *not* demo the error on my systems:

#! /usr/bin/env python

lines = ["""#! /usr/bin/env python

import random
c = 0
n = random.randrange(10L**10)
"""]

for i in range(100000):
     lines.append('if n % random.randrange(2, 1000) == 0: c += 1')
lines.append('print c')
lines.append('##############')
progtext = '\n'.join(lines)

f = file('manyifs.py', 'w')
f.write(progtext)
f.close()

exec progtext



-- 
--Bryan


From webraviteja at gmail.com  Sun Feb  5 04:19:43 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 5 Feb 2006 01:19:43 -0800
Subject: ActiveGrid and Python Frameworks.
Message-ID: <1139131183.773352.147130@g43g2000cwa.googlegroups.com>

  Why is no one talking about ActiveGrid, which at least on the surface
seems to be the most polished way to build web applications in Python
so far. They have a sound financial backing, $10 million when I last
heard, made news on non-Python circles, have a relatively friendly
authoring environment and are probably addressing the enterprise more
specifically than any other web framework.

  It somehow did not grow on me but I would love to hear what others'
experiences are compared to other frameworks they use.



From mensanator at aol.com  Sat Feb 11 08:27:31 2006
From: mensanator at aol.com (mensanator at aol.com)
Date: 11 Feb 2006 05:27:31 -0800
Subject: Shortest prime number program
In-Reply-To: <1139652226.869102.310180@g14g2000cwa.googlegroups.com>
References: <1139652226.869102.310180@g14g2000cwa.googlegroups.com>
Message-ID: <1139664451.717872.129170@o13g2000cwo.googlegroups.com>


swisscheese wrote:
> I figured someone out there must have written a minimal code size prime
> number generator. I did not find one after a bit of searching around.
> For primes up to 100 the best I could do was 70 characters (including
> spaces):
>
> r=range(2,99)
> m=[x*y for x in r for y in r]
> [x for x in r if not x in m]

import gmpy
p=2
while p<99:p=gmpy.next_prime(p)



From localpricemaps at gmail.com  Fri Feb  3 18:55:44 2006
From: localpricemaps at gmail.com (localpricemaps at gmail.com)
Date: 3 Feb 2006 15:55:44 -0800
Subject: indentation messing up my tuple?
In-Reply-To: <1138826306.523674.270690@z14g2000cwz.googlegroups.com>
References: <1138409154.334017.176760@g49g2000cwa.googlegroups.com>
	<pan.2006.01.28.01.27.40.386948@REMOVETHIScyber.com.au>
	<1138414427.035181.284740@z14g2000cwz.googlegroups.com>
	<1138477255.714961.281940@f14g2000cwb.googlegroups.com>
	<1138727155.471107.206720@o13g2000cwo.googlegroups.com>
	<1138820907.033454.309290@g14g2000cwa.googlegroups.com>
	<1138826306.523674.270690@z14g2000cwz.googlegroups.com>
Message-ID: <1139010944.207977.17360@g43g2000cwa.googlegroups.com>

the, the issue is that the last loop adds the last value of everything
to the data array



From joel.hedlund at gmail.com  Tue Feb  7 12:11:57 2006
From: joel.hedlund at gmail.com (Joel Hedlund)
Date: Tue, 07 Feb 2006 18:11:57 +0100
Subject: Best way of finding terminal width/height?
In-Reply-To: <11uhcjj2p10mm0d@corp.supernews.com>
References: <96nFf.43896$d5.199922@newsb.telia.net>
	<11uc3dohfitotc5@corp.supernews.com>
	<jysFf.155352$dP1.513537@newsc.telia.net>
	<11udc0r2bq11042@corp.supernews.com> <43E719EE.3040401@gmail.com>
	<11ueq4nhn91qm91@corp.supernews.com> <43E8659D.6010101@gmail.com>
	<11uhcjj2p10mm0d@corp.supernews.com>
Message-ID: <43E8D4DD.7040904@gmail.com>

> You just call the failed read() or write() again.  Unless
> there's some way that the read/write partially succeeded and
> you don't have any way to know how many bytes were
> read/written, If that's the case then Python's "file" object
> read and write would appear to be broken by design.

Wow... I tried to set up an example that would fail, and it didn't. It seems the test only fails if I use the keyboard to cram stuff into stdin, and not if stdin is a regular pipe. 

Could this perhaps be some kind of misbehavior on behalf of my terminal emulator (GNOME Terminal 2.12.0 in Ubuntulinux 5.10)?

Example follows:

<winch.py>

import signal, os, sys
from terminal_info import get_terminal_size

terminal_size = get_terminal_size()

_bTerminalSizeChanged = False

def report_terminal_size_change(signum, frame):
    global _bTerminalSizeChanged
    _bTerminalSizeChanged = True

def update_terminal_size():
    global _bTerminalSizeChanged, terminal_size
    terminal_size = get_terminal_size()
    _bTerminalSizeChanged = False
    
signal.signal(signal.SIGWINCH, report_terminal_size_change)

# Retry IO operations until successful.
io_successful = False
while not io_successful:
    try:
        s = sys.stdin.read()
        io_successful = True
    except IOError:
        pass

io_successful = False
while not io_successful:
    try:
        sys.stdout.write(s)
        io_successful = True
    except IOError:
        pass

</winch.py>

Then run the prog and pipe a large chunk of text into stdin, and redirect stdout to a file:

$ cat /a/large/text/file | python winch.py > copy.of.the.large.file

Now, what happens for me is exactly what I wanted. I can resize the window as much as I like, and a diff 

$ diff /a/large/text/file copy.of.the.large.file

comes up empty. A perfectly good copy.

However, if I do this instead (try to use keyboard to push stuff into stdin):

$ python winch.py > copy.of.the.large.file

I expect python not to return until I press Ctrl-D on my keyboard, but it does return as soon as I enter more than one line of text and then resize the window (one unterminated line is ok). 

Example text to type in:
moo moo
cow cow

As soon as I have typed in something that includes a newline charater through the keyboard and try to resize the terminal, sys.stdin.read() will return whatever I put in no far and no exception raised.

Weird. Could it in fact my terminal that's screwing things up for me?

/Joel


From jm.suresh at gmail.com  Tue Feb 21 00:25:42 2006
From: jm.suresh at gmail.com (Suresh Jeevanandam)
Date: Tue, 21 Feb 2006 10:55:42 +0530
Subject: Augmented assignment
Message-ID: <dte88n$568$2@home.itg.ti.com>

Hi,
	Is there any gain in performance because of augmented assignments.

	x += 1  vs x = x+1

Or are both of them the same.

regards,
Suresh


From struggleyb at gmail.com  Thu Feb 23 04:43:44 2006
From: struggleyb at gmail.com (Bo Yang)
Date: Thu, 23 Feb 2006 17:43:44 +0800
Subject: make a class instance from a string ?
In-Reply-To: <mailman.1955.1140018042.27775.python-announce-list@python.org>
References: <mailman.1955.1140018042.27775.python-announce-list@python.org>
Message-ID: <43FD83D0.5010104@gmail.com>

Hi,
I know in java , we can use

class.ForName("classname")


to get an instance of the class 'classname' from a
string , in python , how do I do that ?

Thanks in advance !



From roy at panix.com  Tue Feb  7 14:51:18 2006
From: roy at panix.com (Roy Smith)
Date: Tue, 7 Feb 2006 19:51:18 +0000 (UTC)
Subject: Object Oriented vs Pythonic Code, and Pythonic standards
References: <mailman.1561.1139337813.27775.python-list@python.org>
Message-ID: <dsatnm$i8o$1@reader2.panix.com>

Carl J. Van Arsdall <cvanarsdall at mvista.com> wrote:
> My question is, should we as python developers be trying to write
> code that follows more of a python standard or should we try to
> spend our efforts to stick to a more traditional OO model?

There is much about traditional OO which translates well to Python,
but sometimes it is difficult to read a treatise on OO and tell which
bits are "traditional OO" and which are "OO in C++/Java".

Traditional OO teaches that tight coupling of classes is bad, and this
is just as true in Python as it is in any language.

Many OO adherents also push lots of unit testing and test-driven
development; this works just as well (perhaps even better) in Python
as it does in other langauges.

> For example, in C++ I might make a file that defines a class and all
> its methods, at which point I create an object and do things with
> it.  My interpretation of what is "Pythonic" would be instead of
> creating a class I would just define functions and maybe some
> variables global to a module.  At this point, I import the module
> and just make function calls.

In general, defining classes and methods works in Python just like it
does in C++.  Your idea of making a module just a collection of functions
would correspond to defining a bunch of functions inside a namespace
in C++.  There are times when it might make sense, such as the math
module, but it would be unusual.

>There are many similarities here, but the difference is that in python I 
>don't feel as though I would define a class, I would just treat the 
>python module as a class instead, especially if it was a type of object 
>that I would only need a single instance of.

Why not?  Read up on the "singleton pattern".

Where OO in Python differs significantly from OO in C++ is anything
having to do with strict type checking.  There are lots of design
patterns that have to do with insulating classes from the types of
things they interact with.  In Python, that's mostly a non-issue
because of Python's dynamic typing.  If you ever see yourself
obsessing over the types of arguments, that's the time to ask yourself
if you're trying to do something unpythonic.

Another place where OO in Python tends to be at odds with OO in
C++/Java is data hiding.  Traditional OO dogma is that ALL data should
be private, accessed externally only through dedicated get()/set()
methods.  Python code tends to reject that (for reasons that I only
partially agree with).  In C++, you would say foo.setValue(x), but in
Python you would just say foo.Value = x.  There's nothing that says
you can't make all data private (with the underscore syntax) and write
setter/getter methods, but that's not the style that's commonly used.
Part of the reason is because in Python you can intercept all
attribute access with __getattribute__(), and __setattribute__(), but
I suspect another part of it is an emotional reaction to C++'s B&D
style of coding.  I'm not trying to persuade you one way or the other
here, but you should be aware of both styles.


From nd51 at le.ac.uk  Tue Feb 21 11:12:27 2006
From: nd51 at le.ac.uk (N.Davis)
Date: Tue, 21 Feb 2006 16:12:27 +0000
Subject: Zope/Plone - Is it the right solution?
In-Reply-To: <1140532818.195281.316580@g44g2000cwa.googlegroups.com>
References: <1140532818.195281.316580@g44g2000cwa.googlegroups.com>
Message-ID: <dtfe5d$bcc$1@south.jnrs.ja.net>

kbperry wrote:
   I attend a very large university (around
> 30,000 students), and the CS site will need to be updated by many
> people that don't have technical skills (like clerical staff).
That is exactly the kind of thing Plone is good at. A good match I would 
say.

Check out  http://plone.org/documentation/faq

The answers to your other questions can be found there.


From python.list at tim.thechases.com  Thu Feb 16 06:53:15 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Thu, 16 Feb 2006 05:53:15 -0600
Subject: looping over more than one list
In-Reply-To: <1140102047.341803.10400@g44g2000cwa.googlegroups.com>
References: <1140102047.341803.10400@g44g2000cwa.googlegroups.com>
Message-ID: <43F467AB.1020708@tim.thechases.com>

> def lowest(s1,s2):
>     s = ""
>     for i in xrange(len(s1)):
>         s += lowerChar(s1[i],s2[i])
>     return s
> 
> this seems unpythonic, compared to something like:
> 
> def lowest(s1,s2):
>     s = ""
>     for c1,c2 in s1,s2:
>         s += lowerChar(c1,c2)
>     return s

If I understand correctly, something like

	for c1,c2 in zip(s1,s2):

is what you're looking for.  It will gracefully stop when it 
reaches the end of the shortest input. (in your indexed 
example above, if s2 is shorter than s1, it will likely 
throw an out-of-bounds exception)

For your example, I'd use

def lowest(s1,s2):
   return ''.join([lowerChar(c1,c2) for c1,c2 in zip(s1,s2)])

which seems to do what you describe (I understand that 
appending to strings is an inefficient operation and is 
better done with a join like this)

-tkc








From steve at holdenweb.com  Wed Feb 22 01:44:26 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 22 Feb 2006 01:44:26 -0500
Subject: May i customize basic operator (such as 1==3)?
In-Reply-To: <BAY108-F85E0B9B4C44B7CAA16D68CDFD0@phx.gbl>
References: <BAY108-F85E0B9B4C44B7CAA16D68CDFD0@phx.gbl>
Message-ID: <43FC084A.6010407@holdenweb.com>

kanchy kang wrote:
> many people write test cases with python scripts.
> in these test scripts, there are many validation statements,
> for example, in unittest, failUnless(a == b),(a/b may be stringType or 
> intType...)
> 
> during running test scripts, if there is one exception raised from 
> failUnless, i still do not know a =?, b= ?... i have to add one statment 
> "print a" or "print b" again...
> 
> as i know, there are many validation statements if using python as one 
> test tool...
> i think my suggestion or requirement may benefit users greatly...
> 
A test framework will contain many tests for equality that have nothing 
to do with the tests themselves. So the real answer to this problem is 
to have the tests be more explicit when they need to be. A testEqual(a, 
b) test function would seem to be a more sensible approach than radical 
surgery on the interpreter. The function can then print its arguments if 
they turn out to be unequal.

Otherwise there would have to be some *very* selective mechanism to 
decide when the comparison arguments were printed out.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/


From deets at nospam.web.de  Fri Feb 24 11:33:58 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 24 Feb 2006 17:33:58 +0100
Subject: Module written in C does not repond to Ctrl-C interruption.
References: <dtnak6$aku$1@joe.rice.edu>
Message-ID: <468qvoF9r91vU1@uni-berlin.de>

Bo Peng wrote:

> Dear list,
> 
> I have not done a thorough test, but it occurs to me that
> 
> 1. python code can be interrupted by Ctrl-C.
> 2. A C module, if I add a main() function and run independently, can be
> interrupted by Ctrl-C.
> 3. If I load the C module in python and run, the program will not
> respond to Ctrl-C interruption. I have to kill python explicitly.
> 
> If this is a known behavior or just a special case of mine? Any fix to
> it? I am using python 2.3.4 under Redhat EL4 with gcc 3.3.4.

I fear it is a known behavior and not easy to fix. See the module signal
docs:

"""
Although Python signal handlers are called asynchronously as far as the
Python user is concerned, they can only occur between the ``atomic''
instructions of the Python interpreter. This means that signals arriving
during long calculations implemented purely in C (such as regular
expression matches on large bodies of text) may be delayed for an arbitrary
amount of time. 
"""

So - no workaround here, unless you patch python.

Diez


From kris.kowal at gmail.com  Sat Feb 18 00:32:56 2006
From: kris.kowal at gmail.com (Kris Kowal)
Date: 17 Feb 2006 21:32:56 -0800
Subject: Multi-threaded SSL
Message-ID: <1140240776.132359.57800@g14g2000cwa.googlegroups.com>

Dear Ophidians,

I'm attempting to create an SSL secured, AJAX chat server.  I'm moving
on the hypothesis that I'll need to hang an XMLHttpRequest response
blocking on the server until a new message is ready to be dispatched.
This means that my server must be able to handle many open SSL sockets
in separate threads.

I started with Twisted, but, having looked as far as I can see, SSL is
either not implemented, or not documented for that library.  There are
hints that it's in the works, but that's all.  So, I've moved on.

I'm using PyOpenSSL on a Debian box, and I started with the ActiveState
Cookbook article,
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/442473  The SSL
server works very well as suggested in this article.

Starting with this code and adding threads, I've been trying to make
simultaneous HTTP requests operate in parallel on the server.  To test,
I've added in turn busy and sleepy waiting to the GET processing
segment of the request handler.  The threads work fine; every time the
server accepts a connection, it clearly starts accepting connections in
a new thread.  However, the problem runs deeper than I can see.  The
SSL listening socket blocks on accept in all threads until the one open
SSL connection finishes its waiting, responds, and closes.  This means
that I can only have one client waiting for a response at a time.

Is there a limitation of SSL, or this SSL implementation, or something
else preventing me from having multiple connections waiting for
responses simultaneously?

Many thanks,
Kris Kowal



From lucaberto at libero.it  Sat Feb 18 17:35:10 2006
From: lucaberto at libero.it (luca72)
Date: 18 Feb 2006 14:35:10 -0800
Subject: Pyserial never read
In-Reply-To: <1140219414.143448.234450@z14g2000cwz.googlegroups.com>
References: <1140105936.408387.88130@z14g2000cwz.googlegroups.com>
	<1140219414.143448.234450@z14g2000cwz.googlegroups.com>
Message-ID: <1140302110.028540.176210@g43g2000cwa.googlegroups.com>

Thanks for your help, but it don't solve the problem.
I receive only the echo and full stop.

Many Thanks

Best Regards

Luca



From singletoned at gmail.com  Tue Feb  7 17:27:14 2006
From: singletoned at gmail.com (Ed Singleton)
Date: Tue, 7 Feb 2006 22:27:14 +0000
Subject: Question about idioms for clearing a list
In-Reply-To: <dsb6i8$7rt$1@sea.gmane.org>
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<ds83kd$98m$1@sea.gmane.org> <43E7F59B.9070009@REMOVEMEcyber.com.au>
	<mailman.1537.1139297533.27775.python-list@python.org>
	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>
	<1139306562.105655.23200@f14g2000cwb.googlegroups.com>
	<mailman.1548.1139321341.27775.python-list@python.org>
	<1139332464.076140.164220@g43g2000cwa.googlegroups.com>
	<34bb7f5b0602071406m228105b8y@mail.gmail.com>
	<dsb6i8$7rt$1@sea.gmane.org>
Message-ID: <34bb7f5b0602071427j2cbe0872l@mail.gmail.com>

On 07/02/06, Fredrik Lundh <fredrik at pythonware.com> wrote:
> Ed Singleton wrote
>
> > I'm not mud-slinging, I'm just saying that people are very dismissive
> > of making the language easier to use for newbies.
>
> no, you're telling people who have long experience in explaining things
> to "newbies" that their experiences don't count, and that you are the
> only newbie that's important.

No, I'm saying that people are very dismissive of making things easier
to use for newbies (as you yourself were only a few posts ago)

Ed


From vivainio at gmail.com  Fri Feb 17 02:50:38 2006
From: vivainio at gmail.com (vivainio at gmail.com)
Date: 16 Feb 2006 23:50:38 -0800
Subject: Evil, evil wxPython (and a glimmer of hope)
In-Reply-To: <8764ned5ib.fsf@rose.polar.local>
References: <1140116551.116322.12680@g43g2000cwa.googlegroups.com>
	<8764ned5ib.fsf@rose.polar.local>
Message-ID: <1140162638.200378.199010@g44g2000cwa.googlegroups.com>

Ben Finney wrote:

> The web content is a bit sparse; fortunately the code has seen more
> love than the web pages. Wax was the focus of a couple of Google
> "Summer of Code" projects, and new life seems to have been gained as a
> result.

I'm glad to hear that, however, I just took a look at the mailing list:

http://sourceforge.net/mailarchive/forum.php?thread_id=9696120&forum_id=44351

"""
I am going to take a break from blogging and my personal
projects.  This includes Wax.  In other words, Wax development will be
on hold for a while.  During this time, I might still address urgent
bugs and such, but I don't plan to add new features.
"""

Things like this raise a bit of concern about the survivability of the
project. I wouldn't mind if it was a relatively independent component
but it *is* one that is heavily dependent on wxPython...

Also, I have some issues with the design (I don't know how misguided
they may in fact be, as you can see I'm a complete wx newbie). I'd like
the wax classes to be mixins instead of superclasses, so I could just
add them to the inheritance hierarchy if I needed the features... then,
if wax suddenly went belly-up, I could just remove the mixins and
reimplement the parts that use those, yielding a plain wxpython app.
The method names, also, could be more_pythonic() so I could easily tell
wax stuff from wx stuff. This would be insane if we were talking about
a "standard" windowing system of some kind, but we have to recognize
that we are dealing with volatile third party code here.



From deets at nospam.web.de  Mon Feb 13 10:29:04 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 13 Feb 2006 16:29:04 +0100
Subject: Image to numeric array
References: <mailman.1831.1139841904.27775.python-list@python.org>
Message-ID: <45bmv4F5rjf2U1@uni-berlin.de>

Dimitrios Charitatos wrote:

> Hello,
> 
> I suspect that there is a quite straight forward answer to this, but I
> can't find it... I want to import an image and extract a matrix (or array)
> from it with elements showing the RGB value of each pixel. But I want to
> be able to do this with all types of image formats. It was suggested that
> a function such as 'B = numeric.from_image(A)' was used but I can't find
> it in any of the libraries. I was hoping you could help me on this.

You have to install the numeric library for that. Googling numeric python
will bring you there pretty quick.

Diez


From steve at holdenweb.com  Fri Feb 17 00:40:51 2006
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 17 Feb 2006 00:40:51 -0500
Subject: Open Relay Test
In-Reply-To: <1140150719.298606.9710@g44g2000cwa.googlegroups.com>
References: <1140150719.298606.9710@g44g2000cwa.googlegroups.com>
Message-ID: <dt3nku$rlt$1@sea.gmane.org>

D wrote:
> Hi all .. how could one test to see if an open relay exists on a
> specific email server?
> 
I bet spammers would love someone to answer that question for them. You 
wouldn't be planning spam, by any chance?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From rick at localhost.localdomain  Sun Feb  5 17:56:34 2006
From: rick at localhost.localdomain (Rick Spencer)
Date: Sun, 05 Feb 2006 14:56:34 -0800
Subject: what's wrong with my popen reasoning?
References: <pan.2006.02.05.18.39.11.339378@localhost.localdomain>
Message-ID: <pan.2006.02.05.22.56.32.965209@localhost.localdomain>

On Sun, 05 Feb 2006 10:39:18 -0800, Rick Spencer wrote:
<snip>

>I just want to fire
> off the command line utility (iwconfig) for connecting. In this case, I
> want my program to wait until iwconfig is done before continuing on. I
> figure that I could just write a line of code to read in from the console,
> but I thought there might be a more pythonic way of doing it. 
> 
> Here's my function so far, with variables replaced with constants to make
> it easier to read:
> 
> def connect_clicked(self, widget, data=None):
>  if locked:
>   os.popen("sudo network-admin -c ath0")
>   self.emit('connection-attempted', "ath0")
> 
>  else:
>   os.popen("sudo iwconfig ath0 ap 00:0F:B3:31:CB:01")
>  self.emit('connection-attempted', "ath0")
> 
> Thanks much!
> 
> Cheers, Rick

I found some python code that had the answer. 

def connect_clicked(self, widget, data=None):
 if self.wirelessconnection.locked:
  subprocess.call(["network-admin", "-c", "ath0"])

This  makes my app just wait until the network-admin process is gone.

Cheers, Rick




From plahey at alumni.caltech.edu  Mon Feb 20 11:49:26 2006
From: plahey at alumni.caltech.edu (plahey at alumni.caltech.edu)
Date: 20 Feb 2006 08:49:26 -0800
Subject: Regular expression gone mad
In-Reply-To: <1140432942.392985.148820@z14g2000cwz.googlegroups.com>
References: <1140432942.392985.148820@z14g2000cwz.googlegroups.com>
Message-ID: <1140454166.862825.233900@z14g2000cwz.googlegroups.com>

This may not be enough for what you really want to do, but, given what
you have shown above, regex is the wrong tool for the job.

Use the string method startswith:

for line in ProcMem.split('\n'):
    if line.startswith( 'Mem' ):
        # do stuff



From reply.in.the.newsgroup at my.address.is.invalid  Fri Feb 24 08:40:37 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Fri, 24 Feb 2006 14:40:37 +0100
Subject: [ANN] httpy 0.9.0 -- a sane and robust HTTP library for Python
References: <mailman.2393.1140786497.27775.python-announce-list@python.org>
Message-ID: <jr2uv15aoqd3dott5dfhchehcrril9891c@4ax.com>

Chad Whitacre:
>I am pleased to announce the first public release of httpy -- a sane and 
>robust HTTP library for Python. With httpy, you write "responders," and 
>put them on the network with "couplers." Here is a trivial responder:
>
>   import httpy
>
>   class Responder:
>     def respond(request):
>       raise httpy.Response(200, "Greetings, program!")
>
>
>And here is how to couple it:
>
>   responder = Responder()
>   coupler = httpy.couplers.StandAlone(responder)
>   coupler.go()
>
>httpy is so amazing, in fact, that with it I was able to write an entire 
>wiki in only 20 seconds!

Now that's what I call a short learning curve. So can this replace Zope
then? Or mod_python? Apache? CGI? All of those?

-- 
Ren? Pijlman


From ziggy at fakedaddress.com  Mon Feb 13 20:34:24 2006
From: ziggy at fakedaddress.com (ziggy)
Date: Tue, 14 Feb 2006 01:34:24 GMT
Subject: Jedit
References: <ziggy-358301.20045813022006@netnews.asp.att.net>
	<mailman.1872.1139880104.27775.python-list@python.org>
Message-ID: <ziggy-662F6C.20342313022006@netnews.asp.att.net>

In article <mailman.1872.1139880104.27775.python-list at python.org>,
 Peter Hansen <peter at engcorp.com> wrote:

> ziggy wrote:
> > Just wondering if there is something out there like Jedit, but written 
> > in python ( not just supporting, but actually written in it.. )
> > 
> > Nothing large like Stanzi's or Boa.. Just something quick and simple, 
> > with code completion, and a debugger..
> 
> Is that last part a joke?  "Quick and simple", but with a debugger too?
> 
> Anyway, peruse http://wiki.python.org/moin/PythonEditors and see if any 
> meet your requirements.
> 
> -Peter

Will do, tks.


From xavier.morel at masklinn.net  Sun Feb  5 11:18:38 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Sun, 05 Feb 2006 17:18:38 +0100
Subject: Learning Python
In-Reply-To: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
Message-ID: <ds58ca$aii$2@aphrodite.grec.isp.9tel.net>

Byte wrote:
> x = input(raw_input("Please enter your name: "))
> if x==myself: print 'OK'
> 
> It kinda works - I can get to the please enter your name bit but then
> it simply reprints your input as output. Someone please HELP!
 >

-->
C:\>python
Python 2.4.1 (#65, Mar 30 2005, 09:13:57) [MSC v.1310 32 bit (Intel)] on 
win32
Type "help", "copyright", "credits" or "license" for more information.
 >>> help(input)
Help on built-in function input in module __builtin__:

input(...)
     input([prompt]) -> value

     Equivalent to eval(raw_input(prompt)).

 >>> help(raw_input)
Help on built-in function raw_input in module __builtin__:

raw_input(...)
     raw_input([prompt]) -> string

     Read a string from standard input.  The trailing newline is stripped.
     If the user hits EOF (Unix: Ctl-D, Windows: Ctl-Z+Return), raise 
EOFError.
     On Unix, GNU readline is used if enabled.  The prompt string, if given,
     is printed without a trailing newline before reading.
<--

Where the hell did you get the idea of stacking input on a raw_input in 
the first place?


From bencvt at gmail.com  Wed Feb 22 12:23:26 2006
From: bencvt at gmail.com (Ben Cartwright)
Date: 22 Feb 2006 09:23:26 -0800
Subject: except clause not catching IndexError
In-Reply-To: <dti4d8$lmn$1@mailhub227.itcs.purdue.edu>
References: <dti4d8$lmn$1@mailhub227.itcs.purdue.edu>
Message-ID: <1140629006.892658.33590@g44g2000cwa.googlegroups.com>

Derek Schuff wrote:
> I have some code like this:
>         for line in f:
>                 toks = line.split()
>                 try:
>                     if int(toks[2],16) == qaddrs[i]+0x1000 and toks[0] == "200": #producer
> write
>                         prod = int(toks[3], 16)
>                     elif int(toks[2],16) == qaddrs[i]+0x1002 and toks[0] == "200":
> #consumer write
>                         cons = int(toks[3], 16)
>                     else:
>                         continue
>                 except IndexError: #happens if theres a partial line at the end of file
>                     print "indexerror"
>                     break
>
> However, when I run it, it seems that I'm not catching the IndexError:
> Traceback (most recent call last):
>   File "/home/dschuff/bin/speeds.py", line 202, in ?
>     if int(toks[2],16) == qaddrs[i]+0x1000 and toks[0] == "200": #producer
> write
> IndexError: list index out of range
>
> If i change the except IndexError to except Exception, it will catch it (but
> i believe it's still an IndexError).
> this is python 2.3 on Debian sarge.
>
> any ideas?


Sounds like IndexError has been redefined somewhere, e.g.:
  IndexError = 'something entirely different'
  foo = []
  try:
      foo[42]
  except IndexError: # will not catch the real IndexError; we're
shadowing it
      pass

Try adding "print IndexError" right before your trouble spot, and see
if it outputs "exceptions.IndexError".

--Ben



From uymqlp502 at sneakemail.com  Sat Feb 18 22:48:47 2006
From: uymqlp502 at sneakemail.com (Russ)
Date: 18 Feb 2006 19:48:47 -0800
Subject: aborting without killing the python interpreter
Message-ID: <1140320926.993703.90380@o13g2000cwo.googlegroups.com>

I wrote a simple little function for exiting with an error message:

def error ( message ): print_stack(); exit ("\nERROR: " + message +
"\n")

It works fine for executing as a script, but when I run it
interactively in the python interpreter it kills the interpreter.
That's not what I want. Is there a simple way to have a script
terminate but not have it kill the python interpreter when I run it
interactively? I suspect I may need to use exceptions, but I'm hoping
not to need them. Thanks.



From amnon.friling at citicorp.com  Fri Feb 17 18:42:12 2006
From: amnon.friling at citicorp.com (alf)
Date: 17 Feb 2006 15:42:12 -0800
Subject: HTTP & tcl
References: <1140055458.631283.202510@f14g2000cwb.googlegroups.com>
	<1140079405.290586.298270@g44g2000cwa.googlegroups.com>
	<c8shc3-7ms.ln1@lairds.us>
Message-ID: <1140219732.545586.40890@g14g2000cwa.googlegroups.com>

Cameron Laird wrote:
> In article <1140079405.290586.298270 at g44g2000cwa.googlegroups.com>,
> Fuzzyman <fuzzyman at gmail.com> wrote:
> >
> >alf wrote:
> >> Hi
> >>
> >> I would like to convert the wctpXml-1.3.py program to Tcl (line by
> >> line).
> >> See http://sourceforge.net/project/showfiles.php?group_id=29217
> >> This program sends pages using WCTP.  I know nothing about Python or
> >> XML but this program is small and seems straightforward and I am sure
> >> that I will be able to figure it out - with a little help ;-)
> >> Currently I am stuck in not being able to identify the Tcl equivalent
> >> of Python's "putrequest", as in:
> >> h = httplib.HTTP("wctp.skytel.com",80)
> >> h.putrequest("POST","/wctp")
> >>
> >
> >You'll get more help on Tcl syntax in a Tcl group. :-)
> >
> >Of the HTTP object, the Python documentation says :
> 			.
> 			.
> 			.
> >In other words - you're creating an HTTP connection and request. You'll
> >need to find an 'equivalent' library for Tcl and convert the request
> >using hte semantics of whatever library you choose.
> 			.
> 			.
> 			.
> If you don't immediately see what you're after in <URL:
> http://wiki.tcl.tk/http >, post in comp.lang.tcl, and
> we'll straighten this out.

Hi

I actually did post in comp.lang.tcl.  Please search for "wctp" -- the
3 results are all mine.  Apparently, I am the only person interested in
implementing it in Tcl.
As always, I appreciate your good will and help.

alf.



From lycka at carmen.se  Mon Feb 20 13:33:16 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Mon, 20 Feb 2006 19:33:16 +0100
Subject: web crawler in python or C?
In-Reply-To: <1140069412.051298.242150@g44g2000cwa.googlegroups.com>
References: <1140069412.051298.242150@g44g2000cwa.googlegroups.com>
Message-ID: <dtd21e$qg0$1@wake.carmen.se>

abhinav wrote:
> I want to strke a balance between development speed and crawler speed.

"The best performance improvement is the transition from the
nonworking state to the working state."        - J. Osterhout

Try to get there are soon as possible. You can figure out what
that means. ;^)

When you do all your programming in Python, most of the code that
is relevant for speed *is* written in C already. If performance
is slow, measure! Use the profiler to see if you are spending a
lot of time in Python code. If that is your problem, take a close
look at your algorithms and perhaps your data structures and see
what you can improve with Python. In the long run, going from from
e.g. O(n^2) to O(n log n) might mean much more than going from
Python to C. A poor algorithm in machine code still sucks when you
have to handle enough data. Changing your code to improve on
algorithms and structure is a lot easier in Python than in C.

If you've done all these things, still have performance problems,
and have identified a bottle neck in your Python code, it might
be time to get that piece rewritten in C. The easiest and least
intrusive way to do that might be with pyrex. You might also want
to try Psyco before you do this.

Even if you end up writing a whole program in C, it's not unlikely
that you will get to your goal faster if your first version is
written in Python.

Good luck!

P.S. Why someone would want to write yet another web crawler is
a puzzle to me. Surely there are plenty of good ideas that haven't
been properly implemented yet! It's probably very difficult to
beat Google on their home turf now, but I'd really like to see
a good tool to manage all that information I got from the net,
or through mail or wrote myself. I don't think they wrote that
yet--although I'm sure they are trying.


From johnjsal at NOSPAMgmail.com  Wed Feb 15 00:36:57 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 15 Feb 2006 00:36:57 -0500
Subject: how to write a C-style for loop?
Message-ID: <gZednVPdAtumI2_eRVn-jw@rcn.net>

I assume this is the way for loops are written in C, but if it helps to 
be specific, I'm referring to C# for loops. The Python for loop seems to 
be the same (or similar) to C#'s foreach loop:

foreach int i in X

But how would you write a C# for loop in Python? Do you rework a while 
loop, or use the range() function?

Here's an example:

for (int i = 0; i < 50; i += 5)

How would that go in Python, in the simplest and most efficient way?

Thanks.


From bonono at gmail.com  Fri Feb 10 22:57:48 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 10 Feb 2006 19:57:48 -0800
Subject: functional 0.5 released
In-Reply-To: <mailman.1723.1139591624.27775.python-list@python.org>
References: <mailman.1723.1139591624.27775.python-list@python.org>
Message-ID: <1139630268.808659.148890@o13g2000cwo.googlegroups.com>


Collin Winter wrote:
> As always, feedback welcome!

Any specific reason flip only flip the first 2 arguments rather than
the whole tuple ?

That is, I would like to see:

assert(f(a,b,c, d) == flip(f)(d, c, b, a))



From onurb at xiludom.gro  Thu Feb 16 17:23:35 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Thu, 16 Feb 2006 23:23:35 +0100
Subject: question about scope
In-Reply-To: <9J0Jf.1630$No6.38274@news.tufts.edu>
References: <9J0Jf.1630$No6.38274@news.tufts.edu>
Message-ID: <43f4fb5c$0$3209$636a55ce@news.free.fr>

John Salerno wrote:
> Here's a sentence from Learning Python:
> 
> "Names not assigned a value in the function definition are assumed to be
> enclosing scope locals (in an enclosing def), globals (in the enclosing
> module's namespace) or built-in (in the predefined __builtin__ names
> module Python provides."
> 
> I have trouble reading this sentence. First, I don't understand if the
> word 'enclosing' is a verb or an adjective.

second one

> The whole flow of the
> sentence seems convoluted.

A bit, yes. In short: if a name is used in a function whithout having
been previously assigned in the body of this function, then this name is
looked up first in the enclosing functions definitions (python's
functions can be nested), then in the global (read : module) namespace,
then in the built-in namespace.

And if it's not found, it raises a NameError !-)

> But my real question is this, which is related to the above:
> 
> "Name references search at most four scopes: local, then enclosing
> functions (if any), then global, then built-in."
> 
> I understand what global and built-in are, and I thought I understood
> the concept of local too, but when I got to this sentence (and the
> previous sentence), I became confused about the first two scopes. What's
> the difference between 'local' and 'enclosing functions'? 

This:

def outer_function():
  a = "a in outer"
  def inner_function():
     print "in inner, a = %s" % a
  inner_function()


Python functions can be nested (bis).

>I thought that
> the only way to create a local namespace was if there *was* a function
> definition,

Yes. But since functions definitions can be nested...

> so now I'm confused by the apparent difference that the
> authors are referring to. What's an example of a local scope without
> having a function definition?

I don't know.

> Loops and if statements, perhaps?

Nope, AFAICT.

> And feel free to dissect that first sentence up above, because I just
> don't get it.

Done.



-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From roy at panix.com  Sun Feb 19 08:22:37 2006
From: roy at panix.com (Roy Smith)
Date: Sun, 19 Feb 2006 08:22:37 -0500
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<1140338593.555029.63860@g43g2000cwa.googlegroups.com>
Message-ID: <roy-F93C16.08223719022006@reader2.panix.com>

"Robert J. Hansen" <cipherpunk at gmail.com> wrote:
> LISP has a very well-defined ANSI specification.  Lots of different
> people have written LISPs, from Franz to Steel Bank to GNU to... etc.
> Each of these competes with the others on different grounds; some are
> purely interpreted (ala CLISP), some are compiled (CMUCL), some are...
> etc.  They all implement substantially the same language, but the
> plethora of different implementations has been a tremendous boon for
> the development of efficient compilers, interpreters and garbage
> collectors.

It's been a while since I've dabbled in lisp, but my recollection is that 
the plethora of different implementations has also meant that portability 
is a fantasy.

I dread the day that competing Python implementations spring up.


From lycka at carmen.se  Fri Feb 24 13:10:11 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 24 Feb 2006 19:10:11 +0100
Subject: MySQLdb slow on MySQL 5
In-Reply-To: <mailman.2392.1140782962.27775.python-list@python.org>
References: <1140716394.225560.27920@t39g2000cwt.googlegroups.com>	<mailman.2364.1140721473.27775.python-list@python.org>	<1140727082.800917.44550@i40g2000cwc.googlegroups.com>	<dtmk8t$an9$1@wake.carmen.se>
	<mailman.2392.1140782962.27775.python-list@python.org>
Message-ID: <dtni65$dnv$1@wake.carmen.se>

Gerhard H?ring wrote:
>> Oh well, Oracle will probably kill MySQL soon. 
> 
> Did you read too much Slashdot to spread such FUD?

:) I guess I should have used half a smiley, since I
was only half serious. Buying InnoBase OY was...an
interesting move. Cheap too! It's a while since I visited /.

For those who don't know, Oracle bought a small Finnish
company which developed the transaction-aware table-
backend for MySQL. As far as I understand, this means
nothing for GPL licensed MySQL installations, but if
MySQL sells commercial MySQL-database with transaction
support, I guess they need to share their incomes with
Oracle now, and I suppose Oracle is completely in charge
of future development and price setting for InnoDB. Of
course, MySQL has support for swapping table backends,
and the logical next step might be to use the major open
source transactional low level database Berkeley DB,
which is also dual licensed, and developed by SleepyCat.
Unfortuantely, Oracle just bought them... I'm sure there
are other ways out though. MySQL owns MaxDB, which was
previously SAP DB, a derivate ot the German Adabas D.
I'm not sure how easy it is to rip out the table back-
end of that though. I guess it's not built to be a
separate component.

Anyway, it's annoying with a product that so clearly do
things their own way, instead of the right way. It would
have been one thing if it had been something in a niche
of its own like SQLite, or something novel, such as an
object-relational database ten years ago, but what they've
done is often just non-standard without being better, and
in many aspects buggy and lacking features.

 From a market point of view, I do think that they have
been refreshing, and it was probably good for PostgreSQL
to have competition too, but I would have liked a somewhat
stronger interest in the SQL standard from those guys.

 From this perspective I don't think Monty and M?rten are
better than Bill and Bullmer over in Redmond. They create
vendor lock-in, and a warped view of how things are supposed
to work among many naive developers. While it's obviously
more of an industrial strength product (in its own way) it
does remind me a lot of MS Access / JET. "Let's do something
similar to SQL, and call it SQL, but don't bother looking
at any standards, let's just code what pops up in our minds."

It's one thing if Oracle fails to comply to all standards,
with strange things as treating empty strings as nulls. At
least they can claim that their product had a large installed
base before the standards were set... Hm... That's actually
a rather crappy excuse too... That's what varchar2 was for.

> MySQL 5 could be described as one, according to the feature list, and if 
> you use a transactional table type.

Neither you nor I choose DBMS by ticking off checkboxes
in a list...

> I myself won't bother with it because PostgreSQL is still more 
> featureful that MySQL 5, has a much longer track record with these 
> features proven stable and a more liberal licensing.

How surprising! ;^) Me too by the way... I've had quite a
happy cooperation with Oracle, Informix, Ingres, Mimer,
Sybase and DB2 too. They all have their problems, but I
prefer them to MySQL any day.


From btaranto at gmail.com  Tue Feb  7 13:02:25 2006
From: btaranto at gmail.com (btaranto at gmail.com)
Date: 7 Feb 2006 10:02:25 -0800
Subject: python-ldap
In-Reply-To: <mailman.1559.1139333846.27775.python-list@python.org>
References: <1139330793.864675.302090@f14g2000cwb.googlegroups.com>
	<mailman.1559.1139333846.27775.python-list@python.org>
Message-ID: <1139335345.415395.41690@g43g2000cwa.googlegroups.com>

_)_



From ajsiegel at optonline.com  Tue Feb  7 06:59:48 2006
From: ajsiegel at optonline.com (Arthur)
Date: Tue, 07 Feb 2006 06:59:48 -0500
Subject: Detecting line endings
In-Reply-To: <1hacujo.1p81efw1ej38ioN%aleaxit@yahoo.com>
References: <1139236514.022464.319970@g14g2000cwa.googlegroups.com>
	<1hacujo.1p81efw1ej38ioN%aleaxit@yahoo.com>
Message-ID: <SY%Ff.2208$D32.1862@fe12.lga>

Alex Martelli wrote:
> Fuzzyman <fuzzyman at gmail.com> wrote:
> 
> 
>>Hello all,
>>
>>I'm trying to detect line endings used in text files. I *might* be
>>decoding the files into unicode first (which may be encoded using
> 
> 
> Open the file with 'rU' mode, and check the file object's newline
> attribute.

Do you think it would be sensible to have file.readline in universal 
newline support by default?

I just got flummoxed by this issue, working with a (pre-alpha) package 
by very experienced Python programmers who sent file.readline to 
tokenizer.py without universal newline support.  Went on a long (and 
educational) journey trying to figure out why my file was not being 
processed as expected.

Are there circumstances that it would be sensible to have tokenizer 
process files without universal newline support?

The result here was having tokenizer detect indentation inconstancies 
that did not exist - in the sense that the files were compiled and ran 
fine by Python.exe.

Art


From steve at holdenweb.com  Sat Feb 25 01:56:51 2006
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 25 Feb 2006 01:56:51 -0500
Subject: Optimize flag question
In-Reply-To: <400BDC416E2A0042AA35DF3919BB8A5115E147@mail.mtl.proksim.com>
References: <400BDC416E2A0042AA35DF3919BB8A5115E147@mail.mtl.proksim.com>
Message-ID: <dtov3i$v7e$1@sea.gmane.org>

Olivier Langlois wrote:
> Hi,
> 
>  
> 
> This is my first post on the list. I played with the ?O flag option and 
> I found the hard way that it was breaking the scripts I am using because 
> they rely on the assert statement that the optimize flag remove. From 
> there, I tried to find more information on the effect that this flag has 
> on scripts but I have not found much?
> 
>  
> 
> So my question is: what are the ?optimizations? that the Python 
> interpreter is doing when you specify the optimize flag and is there 
> anything I should be cautious about when using it?
> 
It's not wise to write your program to rely on an assertion error being 
raised, or an assert statement having a side effect, since (as you have 
discovered) when you request optimization the assert statements are 
effectively removed from your program.

Could you outline the code that needs to be in to make the program work, 
so we can assess the errors for ourselves?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From l.exsteens at gmail.com  Thu Feb  2 13:30:26 2006
From: l.exsteens at gmail.com (Laurent)
Date: 2 Feb 2006 10:30:26 -0800
Subject: my openGL API need threads!!! But how to ,ake it work???
In-Reply-To: <1138903508.151933.14440@g14g2000cwa.googlegroups.com>
References: <1138883972.001578.149350@g44g2000cwa.googlegroups.com>
	<1138889819.536105.57620@g47g2000cwa.googlegroups.com>
	<44ekogF1oeqgU1@uni-berlin.de>
	<1138901385.767694.288170@g49g2000cwa.googlegroups.com>
	<44eun8F1rpr2U1@uni-berlin.de>
	<1138903508.151933.14440@g14g2000cwa.googlegroups.com>
Message-ID: <1138905026.119276.87100@g47g2000cwa.googlegroups.com>

Youpiiiiiiiiiiiiiiiiiiiiiiiiiiiie!

That work as I want!!!!

Thx everybody ;)

The problem was that I launched the glut main loop into a thread, and
then it was separated from his initialisations functions


I put it into another method and launch that method into a thread...!

That work!



From fuzzyman at gmail.com  Thu Feb 16 12:00:27 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 16 Feb 2006 09:00:27 -0800
Subject: question about scope
In-Reply-To: <iZ1Jf.1632$No6.38223@news.tufts.edu>
References: <9J0Jf.1630$No6.38274@news.tufts.edu>
	<mailman.2012.1140105439.27775.python-list@python.org>
	<iZ1Jf.1632$No6.38223@news.tufts.edu>
Message-ID: <1140109227.166459.308080@z14g2000cwz.googlegroups.com>


John Salerno wrote:
[snip..]
>
> Thanks guys. It seems like nested functions were what the authors had in
> mind, so that makes a lot more sense now.
>
> But as far as ifs and loops, is there such a thing as scope in them? For
> example, if I assign a variable within an if statement, is it usable
> anywhere else?

Defining a variable in a loop, or within an 'if block' doesn't change
scope, so the variables are useable in the same way as variables
outside the loop. Obviously if you define them within an if block, they
may *not* be defined, so using them could raise a NameError.

if False:
    test = 'something'
print test

All the best,

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml



From simon.dahlbacka at gmail.com  Fri Feb 24 02:47:54 2006
From: simon.dahlbacka at gmail.com (Simon Dahlbacka)
Date: 23 Feb 2006 23:47:54 -0800
Subject: Using ElementTree to tidy up an XML string to my liking
In-Reply-To: <1140716245.381730.285310@j33g2000cwa.googlegroups.com>
References: <1140716245.381730.285310@j33g2000cwa.googlegroups.com>
Message-ID: <1140767274.159129.268640@i39g2000cwa.googlegroups.com>

..I hope that you are aware that xml is *case sensitive*



From localpricemaps at gmail.com  Thu Feb  9 00:24:01 2006
From: localpricemaps at gmail.com (localpricemaps at gmail.com)
Date: 8 Feb 2006 21:24:01 -0800
Subject: how to remove <BR> using replace function?
Message-ID: <1139462640.951603.302830@g44g2000cwa.googlegroups.com>

i have some html that looks like this


<address style="color:#">34 main,<br> Boston, MA</address>

and i am trying to use the replace function to get rid of the <Br> that
i scrape out using this code:

for oText in incident.fetchText( oRE):
            strTitle += oText.strip()
            strTitle = string.replace(strTitle,'<br>','')

but it doesn't seem to remove the <br>

any ideas?



From tim at pollenation.net  Mon Feb 20 07:22:11 2006
From: tim at pollenation.net (Tim Parkin)
Date: Mon, 20 Feb 2006 12:22:11 +0000
Subject: editor for Python on Linux
In-Reply-To: <dtai6e$23m$2@ariane.blic.net>
References: <dtai6e$23m$2@ariane.blic.net>
Message-ID: <43F9B473.80901@pollenation.net>

Mladen Adamovic wrote:

>Hi!
>
>I wonder which editor or IDE you can recommend me for writing Python 
>programs. I tried with jEdit but it isn't perfect.
>
>  
>
I've been using wing for quite some time and it's an excellent dedicated
editor for python. If you want flexible debugging in a gui environment
it's hard to beat.

Tim Parkin


From onurb at xiludom.gro  Tue Feb  7 11:59:46 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Tue, 07 Feb 2006 17:59:46 +0100
Subject: Too Many if Statements?
In-Reply-To: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
Message-ID: <43e8d21b$0$32168$626a54ce@news.free.fr>

slogging_away wrote:
> Hi - I'm running Python 2.4.2 (#67, Sep 28 2005, 12:41:11) [MSC v.1310
> 32 bit (Intel)] on win32, and have a script that makes numerous checks
> on text files, (configuration files), so discrepancies can be reported.
>  The script works fine but it appears that I may have hit a wall with
> 'if' statements.
> 
> Due to the number of checks perfromed by the script on the text files,
> (over 500), there are quite a few 'if' statements in the script, (over
> 1150).  It seems that it is at the point that when I add any additional
> 'if' statements the script will not run.  No error is produced - it
> just returns to the python prompt much the same as when a successful
> 'Check Module' command is selected.  If I delete some other 'if'
> statements the new ones work so it appears that it has hit a limit on
> the number of 'if' statements.  This has stunted any further checks for
> the script to make on the text files.
> 
> Hs anyone ever run into this sort of thing?
> 

Nope - but I never saw any code block with 1150+ tests in it neither :-/

Smells like a design problem anyway. Have you considered refactoring
your code ?


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From scott.daniels at acm.org  Wed Feb  8 12:21:46 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Wed, 08 Feb 2006 09:21:46 -0800
Subject: breadth first search
In-Reply-To: <43EA2474.7010109@plope.com>
References: <43ea2271$1@127.0.0.1> <43EA2474.7010109@plope.com>
Message-ID: <43ea2775$1@nntp0.pdx.net>

Chris McDonough wrote:
> News wrote:
>...   Can Python
>> create list dynamically, I want to implement a program which will read 
>> data
>> from a file and store each line into a list, is this possible?
> 
> L = []
> [L.append(line) for line in (open('filename.txt')]
> 
> - C
Woops, crossed wires there:
after:
     somefile = open('filename.txt')

You can do:
     L = somefile.readlines()
or
     L = [line for line in somefile]
or
     L = []
     for line for line in somefile:
         L.append(line)
to put all lines of somefile into L,

but
     L = []
     K = [L.append(line) for line in somefile]
builds a list K that has a None for each line in
somefile, while filling up L with the lines as a side-effect.
It is a style to avoid.  Dropping the "K = " part simply says
"build the list of Nones and then discard it." -- not good style.

Also, it is good style to then call somefile.close() after
you are done with the file.

--Scott David Daniels
scott.daniels at acm.org


From escalation746 at yahoo.com  Mon Feb 27 15:04:31 2006
From: escalation746 at yahoo.com (robin)
Date: Mon, 27 Feb 2006 20:04:31 +0000
Subject: new wooden door step - fixing and finishing
References: <1140598234.454510.281820@g14g2000cwa.googlegroups.com>
	<V17Lf.17308$915.16029@southeast.rr.com>
Message-ID: <tlm6029ej4cndqnqlb20q8t58ckt9koqrl@4ax.com>

Jeffrey Schwab <jeff at schwabcenter.com> wrote:

>> I was wondering about treating it
>> wilth liberal amounts of Teak Oil or similar...
>
>Some people, when confronted with a problem, think "I know, I?ll use 
>Teak Oil."  Now they have two problems.

+1 QOTW

BTW, I integrated a similar line into one of my readings (I sideline
as a poet), a piece entitled "Advice For Modern Living". Goes like
this:

"When confronted with a conflict some people go to a solicitor for
advice. Now they have two problems."

-----
robin
noisetheatre.blogspot.com


From amorgan at xenon.Stanford.EDU  Thu Feb  2 12:44:39 2006
From: amorgan at xenon.Stanford.EDU (Alan Morgan)
Date: Thu, 2 Feb 2006 09:44:39 -0800 (PST)
Subject: How do I dynamically create functions without lambda?
References: <1138389517.896043.7450@g47g2000cwa.googlegroups.com>
	<pan.2006.01.28.12.02.34.293286@REMOVETHIScyber.com.au>
	<drr978$oat$1@xenon.Stanford.EDU>
	<1ha3g79.1gcm6x1yziggyN%aleaxit@yahoo.com>
Message-ID: <drtge7$813$1@xenon.Stanford.EDU>

In article <1ha3g79.1gcm6x1yziggyN%aleaxit at yahoo.com>,
Alex Martelli <aleaxit at yahoo.com> wrote:
>Alan Morgan <amorgan at xenon.Stanford.EDU> wrote:
>   ...
>> Excessive cleverness can lead to unmaintainable code.  So can excessive
>> stupidity.
>
>+1 QOTW.

import blush

>> Since there are a lot more stupid people than clever people out there I
>> think the more likely scenario is having to maintain unmaintainable code
>> written by a complete idiot whose programming knowledge comes solely from
>> books whose titles end with "In 7 Days".
>
>Disagree -- far more people THINK they're clever, than really ARE
>clever.

No doubt about it, but I don't see how it contradicts my statement.

>According to a recent article in the Financial Times, over 40%
>of a typical financial firm's employees firmly believe they are among
>the 5% best employees of the firm -- and the situation, believe me, is
>no different in programming.

I wonder if python, which has a low barrier to entry due to its simple syntax
and general readability, might not have a worse time of this than other languages.

Alan
-- 
Defendit numerus


From mvanaswegen at gmail.com  Tue Feb 14 03:58:39 2006
From: mvanaswegen at gmail.com (vpr)
Date: 14 Feb 2006 00:58:39 -0800
Subject: Python / Apache / MySQL
Message-ID: <1139907519.427789.188760@g14g2000cwa.googlegroups.com>

Hi All

I want to build an Website using Apache / Python and MySQL.
I dont want to spend to much time hacking html. I'm looking for some
recommendations
e.g. should I be using mod_python ?
whats the best module for mysql ?

any suggestings so I could get my site up in a day ?

mvanaswegen at gmail.com



From simon at titanic.co.uk  Fri Feb  3 11:55:38 2006
From: simon at titanic.co.uk (Simon Faulkner)
Date: Fri, 03 Feb 2006 16:55:38 +0000
Subject: Python on Windows
Message-ID: <43E38B0A.5050803@titanic.co.uk>

I've just written my first (simple) WxPython program - yaaaay!

What would folks suggest is the easiest way to package it to run on 
other windows PCs?

I would love a single .exe file that would run without ANY OTHER FILES 
even if it was 50 Mb!

TIA


Simon


From mark at holmes.nl  Fri Feb 17 03:15:31 2006
From: mark at holmes.nl (wscrsurfdude)
Date: 17 Feb 2006 00:15:31 -0800
Subject: file.read problem
In-Reply-To: <eFeJf.15429$MJ.7709@fed1read07>
References: <1140158220.388409.87650@g47g2000cwa.googlegroups.com>
	<BieJf.15428$MJ.2728@fed1read07>
	<1140159632.758960.318580@g44g2000cwa.googlegroups.com>
	<eFeJf.15429$MJ.7709@fed1read07>
Message-ID: <1140164131.012482.24710@g43g2000cwa.googlegroups.com>


Farshid Lashkari wrote:
> > I am working on a script to get parts of raw data out of a file, and
> > the data I read has to be the data written in the file without CR or
> > LF.
>
> So you just want to remove all the linefeeds? This should work then:
>
> data = data.replace('\n','')
>
> -Farshid

The problem is if I remove the linefeeds, I also delete readout data if
it is 0x0A, and I don't want this, because the files I readout has to
be a part of the original data. Another idea??

But still my question is why is the:
f = open('myfile,'r')
a = f.read(5000)
working in linux??



From hancock at anansispaceworks.com  Wed Feb 22 22:31:08 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Wed, 22 Feb 2006 21:31:08 -0600
Subject: "configuring" a class
In-Reply-To: <1140658115.672421.207560@g47g2000cwa.googlegroups.com>
References: <1140658115.672421.207560@g47g2000cwa.googlegroups.com>
Message-ID: <20060222213108.72bf48db@samwise.anansi>

On 22 Feb 2006 17:28:35 -0800
"Russ" <uymqlp502 at sneakemail.com> wrote:
> I would like to let the user of one of my classes
> "configure" it by activating or de-activating a particular
> behavior (for all instances of the class).

> One way to do this, I figured, is to have a static class
> variable, along with a method to set the variable.
> However, I am stumped as to how to do that in python.
> Suggestions welcome.

Like this?

>>> class Switchable(object):
...     def _plus(self, val):
...             return val
...     def _minus(self, val):
...             return -val
...     switch = _plus
...     def sense(self, value):
...             return self.switch(value)
...
>>> a = Switchable()
>>> b = Switchable()
>>> a.sense(2)
2
>>> b.sense(3)
3
>>> Switchable.switch = Switchable._minus
>>> a.sense(3)
-3
>>> b.sense(2)
-2

Seems to work. Might be more elegant to do that
switch with a method of Switchable.  Maybe:

   def flipswitch(self, num):
       if num == 1:
           self.switch = self._plus
       else:
           self.switch = self._minus

Then you'd switch with, e.g.:

Switchable.flipswitch(1)

> The next best thing, I figure, is to just use a global
> variable. Several "methods" of the class then check the
> value of the global variable to determine what to do. The
> user can then just set the variable to get the desired
> behavior.

Ick.

> However, I tried this and it does not seem to work. I
> imported the class, then set the global variable. But the
> new value of the variable somehow did not get back into
> the class methods that need to see it.

Undoubtedly you shadowed it somehow, but without seeing
the code, I can't guess how.

> Can anyone give me a clue about this? If there is a better
> way, please let me know. Thanks.

Recommend you stick with the first idea, which
as you see works fine.

Cheers,
Terry

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From michele.petrazzo at TOGLIunipex.it  Thu Feb 23 03:52:21 2006
From: michele.petrazzo at TOGLIunipex.it (Michele Petrazzo)
Date: Thu, 23 Feb 2006 09:52:21 +0100
Subject: PyUNO with different Python
In-Reply-To: <dtjhn6$fpl$1@lnx107.hrz.tu-darmstadt.de>
References: <mailman.2306.1140622912.27775.python-list@python.org>
	<43fcad29$0$29099$5fc30a8@news.tiscali.it>
	<43fcc038$0$19689$8fcfb975@news.wanadoo.fr>
	<dtjhn6$fpl$1@lnx107.hrz.tu-darmstadt.de>
Message-ID: <43fd77cf$0$29110$5fc30a8@news.tiscali.it>

Stefan Behnel wrote:
> M?ta-MCI schrieb:
>> The second way don't run:
>> 
>> Traceback (most recent call last): File "C:\Program
>> Files\OpenOffice.org 2.0\program\hello_world.py", line 1, in? 
>> import uno File "C:\Program Files\OpenOffice.org
>> 2.0\program\uno.py", line 37, in ? import pyuno ImportError: Module
>> use of python23.dll conflicts with this version of Python.
> 
> Sounds like you might want to switch back to Python 2.3 ...
> 

Yes and no.
I have both 2.3 and 2.4 on my debian system and with both, the program
at: http://udk.openoffice.org/python/samples/ooextract.py

work well with a modify:
before the first line "import uno", add:

import sys
sys.path.append("/opt/openoffice.org2.0/program/")

Now, save the program, move it where you want, and go:

michele:~$ python2.3 tmp/ooextract.py --pdf test.odt
michele:~$ python2.4 tmp/ooextract.py --pdf test.odt

Both create the test.pdf file!

P.s. Before execute the script, execute OOo:
soffice "-accept=socket,host=localhost,port=2002;urp;"

> Stefan

Michele


From claudio.grondi at freenet.de  Sun Feb 26 04:56:10 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Sun, 26 Feb 2006 10:56:10 +0100
Subject: Is Python a Zen language?
In-Reply-To: <1140931766.200951.321320@t39g2000cwt.googlegroups.com>
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
	<1140931766.200951.321320@t39g2000cwt.googlegroups.com>
Message-ID: <dtrtue$1l1$1@newsreader3.netcologne.de>

Crutcher wrote:
> You are a very silly person. 

Claudio


From roccomoretti at hotpop.com  Tue Feb 14 10:16:18 2006
From: roccomoretti at hotpop.com (Rocco Moretti)
Date: Tue, 14 Feb 2006 09:16:18 -0600
Subject: how do you pronounce 'tuple'?
In-Reply-To: <ieGdnftVlNuA3WzenZ2dnUVZ_t2dnZ2d@speakeasy.net>
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>	<F8CdnVhx1t4tsW3enZ2dnUVZ_sCdnZ2d@speakeasy.net>
	<mailman.1857.1139863723.27775.python-list@python.org>
	<ieGdnftVlNuA3WzenZ2dnUVZ_t2dnZ2d@speakeasy.net>
Message-ID: <dsss7u$g0n$1@news.doit.wisc.edu>

Erik Max Francis wrote:
> If a 4-tuple is a quadruple, a 3-tuple is a triple, a 
> 2-tuple is an pair, then I guess a 1-tuple would be a single.  Granted 
> that's not nearly as gruesome enough a name to go with the special 
> lopsided Pythonic creature mentioned above.  I suggest we name it a 
> hurgledink.

+1 QOTW


From aleaxit at yahoo.com  Fri Feb  3 10:40:38 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Fri, 3 Feb 2006 07:40:38 -0800
Subject: Another try at Python's selfishness
References: <1138918102.863033.298700@o13g2000cwo.googlegroups.com>
	<drvd56$nb3$1@wake.carmen.se>
	<1138967463.440194.184710@g49g2000cwa.googlegroups.com>
	<pan.2006.02.03.12.32.47.209717@REMOVETHIScyber.com.au>
Message-ID: <1ha6a71.10mos5m9evcy8N%aleaxit@yahoo.com>

Steven D'Aprano <steve at REMOVETHIScyber.com.au> wrote:
   ...
> > Why shouldn't
> >   def self.x():
> > declare two new identifiers ("x" and "self"), too?
> 
> Sure, but now the call foo.bar

"call"?

> has special meaning inside a def statement
> than elsewhere. Elsewhere, foo.bar is an attribute access, looking up
> attribute bar in foo's namespace.

or setting it, as in foo.bar=23, or setting both names, as in

import foo.bar

> Using your syntax, in a def statement
> foo.bar is a pair of declarations: it declares a name "foo", and it
> declares a second name "bar".

"declares" isn't really pythonic -- let's talk about binding or setting
names, instead.

> This inconsistency is, I think, worse than the implicit use of self.

I don't think there's any inconsistency in deciding that syntax x.y has
different meanings (as to what gets looked up or bound) in different
contexts, because it already does: mostly "look up y in namespace x",
but in x.y=... it's "bind y in namespace x" and in "import x.y" it's
"bind x AND then bind y in namespace y".

Since "def x.y(..." is currently a syntax error, it would introduce no
backwards compatibility to assign a meaning to it.  Since the 'def'
statement binds something to the name that follows it (which currently
must be a plain identifier), that's what it should do if it allowed the
following name to be a compound one, too.

Unfortunately, none of this suggests that it's reasonable to have

def x.y(z): ...

mean the same as

def y(x, z): ...

and I have no idea of how it would generalize to def x.y.z(t): ...
(while import x.y.z generalizes in a pretty obvious way wrt import x.y).

So, I'm not supporting the OP's idea; just rejecting the specific
objections to it.


Alex


From bob.python at yahoo.com  Sat Feb 25 11:39:42 2006
From: bob.python at yahoo.com (Bob)
Date: 25 Feb 2006 08:39:42 -0800
Subject: Can optparse do dependencies?
Message-ID: <1140885582.311180.120550@i39g2000cwa.googlegroups.com>

I'd like to setup command line switches that are dependent on other
switches, similar to what rpm does listed below. From the grammar below
we see that the "query-options" are dependent on the query switch,
{-q|--query}. Can "optparse" do this or do I have to code my own
"thing"? Thanks.

QUERYING AND VERIFYING PACKAGES:
       rpm {-q|--query} [select-options] [query-options]
...
   query-options
        [--changelog] [-c,--configfiles] [-d,--docfiles] [--dump]
        [--filesbypkg] [-i,--info] [--last] [-l,--list]
        [--provides] [--qf,--queryformat QUERYFMT]
        [-R,--requires] [--scripts] [-s,--state]
        [--triggers,--triggerscripts]



From igouy at yahoo.com  Fri Feb 24 14:56:23 2006
From: igouy at yahoo.com (igouy at yahoo.com)
Date: 24 Feb 2006 11:56:23 -0800
Subject: Is python very slow compared to C
In-Reply-To: <dtkg20$gcf$1@wake.carmen.se>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
	<1140638245.919385.84510@g47g2000cwa.googlegroups.com>
	<dtkg20$gcf$1@wake.carmen.se>
Message-ID: <1140810983.472208.20210@i40g2000cwc.googlegroups.com>


Magnus Lycka wrote:
> Isaac Gouy wrote:
> >>I think it is wrong to call Python "very slow" just because it is slower
> >>than some other language or languages, for the same reason it would be
> >>wrong to describe the population of the UK as "very low" because 60
> >>million people is a smaller number than China or India's one billion plus.
> >>Doing so merely reinforces the premature optimizer's message that any
> >>language that isn't C (and sometimes Lisp) is "not fast enough".
> >
> > There was some context: Is python very slow compared to C?
>
> But that is a stupid context. It doesn't really tell us
> anything. Slow at what?

As I said: We can make /the missing context/ in the OP's question more
obvious...


>
> No one writes a program for the purpose of doing loops,
> comparing integers, setting up stack frames or jumping
> between instructions.
>
> The context for programming typically involves solving some
> problem or executing a function that matters to the user.
>
> It's just as database benchmarks. TPC C benchmarks tells us
> how fast a certain database is at performing TPC C benchmarks.
> Does that tell you anything about how fast it will be compared
> to competing products for your real world problem? Probably
> not. Which ever product you choose, you might end up with
> situations where a particular function is too slow. You can
> typically solve this either by changing the code or the
> configuration of the server. Sometimes you have to rethink
> your system and solve the problem in another way. Changing
> from e.g. DB2 to Oracle is unlikely to have more impact than
> these smaller changes. It's the same thing with most software
> development.
>
> >> The benchmark you pointed to are of limited use for application
> >> developers. (Their value to language designers is another story.)
> >
> > Limited use for what purpose?
>
> They are more or less useless for anyone who wants to decide
> what programming language to use in a real world situation.

Good that's more explicit.

One of the program contributors told me they do something quite similar
to fasta, k-nucleotide and reverse-complement in their real world
situation.

Isn't it possible that someone would look through The Computer Language
Shootout programs and decide that language X was unusable convoluted
gobbledegook?


> It's simply stupid to implement sorting algorithms in Python.
> It's there already. Solving Ackermann's is also rather far
> from what people typically want to achieve.

What "sorting algorithm" are you talking about?
There isn't one on http://shootout.alioth.debian.org/gp4/

Solving Ackermann's? Well if that was really the point then the
programs would be allowed to use memoization rather than simple
recursion.


> If people actually
> had the time and resources to create real software products,
> (i.e. things that take man-months to create) from the same
> spec, and developed e.g. ten programs each each ten different
> programming languages in cleanroom conditions, we'd probably
> learn something useful about the usefulness of a certain type
> of programs with certain programming languages in certain
> conditions, but only in these conditions. I'm rather certain
> that aspects such as team size, development methodology etc
> will influence the relative ratings of programs.
>
> I'm not saying that the typical toy benchmarks are completely
> useless. They might tell us things about particular language
> features that should be improved, or give us clues that a
> certain way of solving a particular problem etc, but they
> don't really help Joe Newbie Programmer who wants to write
> yet another web site toolkit.



From onurb at xiludom.gro  Mon Feb 20 04:08:47 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Mon, 20 Feb 2006 10:08:47 +0100
Subject: Python vs. Lisp -- please explain
In-Reply-To: <1140420339.889629.319920@g44g2000cwa.googlegroups.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<1hb0ib8.w3r86kfbzvkuN%aleaxit@yahoo.com>
	<1140420339.889629.319920@g44g2000cwa.googlegroups.com>
Message-ID: <43f98741$0$31888$636a55ce@news.free.fr>

Harald Armin Massa wrote:
>>>OK, but then we should change <http://python.org/doc/Summary.html>,
>>>which starts with "Python is an interpreted, interactive,
>>>object-oriented programming language."
> 
> 
> I second this motion. Even tried to persuade the site maintainer
> before. We should really, really change it. The perceived speed of
> Python will at least triple on dropping that "interpreted" - and I am
> NOT joking.

+1 on this.



-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From jimlewis at miclog.com  Sat Feb 11 07:22:46 2006
From: jimlewis at miclog.com (swisscheese)
Date: 11 Feb 2006 04:22:46 -0800
Subject: Shortest prime number program
In-Reply-To: <i_jHf.32$oj5.9305@news.siol.net>
References: <1139652226.869102.310180@g14g2000cwa.googlegroups.com>
	<i_jHf.32$oj5.9305@news.siol.net>
Message-ID: <1139660566.389036.166090@g14g2000cwa.googlegroups.com>

At 58, very nice :-) Building on yours we get 57:
r=range(2,99)
[x for x in r if sum([x%d==0 for d in r])<2]



From steve at REMOVETHIScyber.com.au  Mon Feb  6 16:56:00 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Tue, 07 Feb 2006 08:56:00 +1100
Subject: Question about idioms for clearing a list
References: <mailman.1294.1138727665.27775.python-list@python.org>
	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>
	<mailman.1489.1139232969.27775.python-list@python.org>
	<pan.2006.02.06.14.01.42.189937@REMOVETHIScyber.com.au>
	<m2vevswnyz.fsf@unique.fqdn>
Message-ID: <pan.2006.02.06.21.55.56.866680@REMOVETHIScyber.com.au>

On Mon, 06 Feb 2006 09:39:32 -0500, Dan Sommers wrote:

> On Tue, 07 Feb 2006 01:01:43 +1100,
> Steven D'Aprano <steve at REMOVETHIScyber.com.au> wrote:
> 
>> On Mon, 06 Feb 2006 13:35:10 +0000, Steve Holden wrote:
>>>> I'm wondering why there is no 'clear' for lists. It feels like a common
>>>> operation for mutable containers. :-/
>>>> 
>>> Because it's just as easy to create and assign a new empty list (and 
>>> have the old unused one garbage collected).
>>> 
>>> l = []
>>> 
>>> is all you need!
> 
>> Not so. If that logic were correct, then dicts wouldn't need a clear
>> method either, because you could just assign a new empty dict with d = {}.
> 
>> But your own sentence tells us why this is not sufficient: because you
>> aren't emptying the list, you are reassigning (rebinding) the name. The
>> old list still exists, and there is no guarantee that it will be garbage
>> collected, because there is no guarantee that it isn't in use somewhere
>> else:
> 
>> L = [0,1,2]
>> D = {"key": L}
>> L = []  # rebinds the name L, but the list instance still exists
> 
> That is a red herring.  Consider this:
> 
> L = [object(), object()]
> O = L[1]
> L = [] # or insert your favorite list-clearing/emptying statement here
> 
> What damage is done now that O is still referring to one of the items
> that used to be in L?

What relevance is this? If there is one and only one reference to the list
L, then it will be garbage collected when L is rebound. I never denied
that. I pointed out that, in the general case, you may have multiple
references to the list (not all of which are bound to names), and
rebinding the name L will NOT have the side-effect of clearing the list.


> The trouble begins when references to "the list to which L refers" end
> up somewhere else.  Then we have to wonder if rebinding L will leave
> some other block of code with an outdated list.

Precisely, just as my example shows.


-- 
Steven.



From reply.in.the.newsgroup at my.address.is.invalid  Thu Feb  9 15:39:20 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Thu, 09 Feb 2006 21:39:20 +0100
Subject: Threads and Interpreter death
References: <mailman.1674.1139506633.27775.python-list@python.org>
Message-ID: <cm9nu1lgnardjgg1gba3as5gabd9fmtcfe@4ax.com>

Carl J. Van Arsdall:
>I've been toying with threads a lot lately and I've noticed that if a 
>scripting error occurs in a thread the thread dies, but not the process 
>that spawned the thread.
>
>Is python supposed to behave this way or is this type of behavior 
>accidental?

"start_new_thread(function, args[, kwargs])
When the function terminates with an unhandled exception, a stack trace is
printed and then the thread exits (but other threads continue to run)."
http://docs.python.org/lib/module-thread.html

-- 
Ren? Pijlman


From maxm at mxm.dk  Mon Feb  6 05:36:37 2006
From: maxm at mxm.dk (Max M)
Date: Mon, 06 Feb 2006 11:36:37 +0100
Subject: Webmail with Python
In-Reply-To: <pan.2006.02.04.20.02.29.212441@thomas-guettler.de>
References: <pan.2006.02.04.20.02.29.212441@thomas-guettler.de>
Message-ID: <43E726B5.5020109@mxm.dk>

Thomas Guettler wrote:
> Hi,
> 
> Is there an application like Squirrelmail[1] written in python?
> 
> I want to access IMAP folder with a web-browser.
> 
> Google shows me some dead projects. Most webmail applications
> seem to be written in PHP. Is there a useable webmailer written
> in python?


This also requires Plone, so it might be a bit heavyweight for your needs:

http://www.mxm.dk/products/public/mxmImapClient/

-- 

hilsen/regards Max M, Denmark

http://www.mxm.dk/
IT's Mad Science


From a.schmolck at gmail.com  Sun Feb 19 17:14:22 2006
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: 19 Feb 2006 22:14:22 +0000
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<yfspsljp321.fsf@oc.ex.ac.uk>
	<mailman.2131.1140377578.27775.python-list@python.org>
Message-ID: <yfsbqx3ov29.fsf@oc.ex.ac.uk>

"Fredrik Lundh" <fredrik at pythonware.com> writes:

> Alexander Schmolck wrote:
> 
> > What's far more interesting to me, however, is that I think there a good
> > reasons to suspect python's slowness is more of a feature than a flaw: I'd not
> > be suprised if on the whole it greatly increases programmer productivity and
> > results in clearer and more uniform code.
> 
> > So ironically, some share of python's success might actually be due to
> > ignorance on Guido's part
> 
> it didn't, for even a millisecond, strike you that maybe, just maybe, the
> "make it as dynamic as we possibly can" choice was made on purpose ?

Python is far less dynamic than smalltalk, and presumably also self (last time
I checked there was no implementation for x86, so I have no practical
experience with self). Even common lisp could reasonably be called more
dynamic than python. And all these language communities did in fact still
manage to come up with efficient implementations.

Thus the "make it as dynamic as it possibly can" choice is hardly the cause
for python's slowness, so what's your point?

My point was that Guido probably (and fortunately!) was unaware of the extent
to which you can have both dynamism and speed and the extent to which very
dynamic languages are suitable for writing robust software. I'm pretty sure I
remember reading stuff by Guido himself in which he indicated that he
originally thought that a language with a similar level of dynamism as python
had to be slow anyway and I'm also pretty sure that I read some other stuff by
him which indicates that he thought a language like python would be only
suitable for relatively small scale development. If you don't doubt he wrote
that I'm not sure what we're disagreeing about (because clearly both
statements are wrong), if you do maybe I or someone else can find the right
reference, or maybe I really misremembered.

Anyayw, I'm pretty sure that Guido wouldn't have bothered to add things like
compiler macros to python, whatever his level of his technical expertise
concerning efficient implementations of highly dynamic languages might have
been.

However I don't find it at all implausible to assume that had Guido known all
the stuff that say, David Ungar and Guy Steele were aware of at the same time,
python would have come out not necessarily less dynamic but considerably
faster -- to its own detriment.

'as


From *firstname*nlsnews at georgea*lastname*.com  Sun Feb 12 14:57:13 2006
From: *firstname*nlsnews at georgea*lastname*.com (Tony Nelson)
Date: Sun, 12 Feb 2006 19:57:13 GMT
Subject: PEP 353: Using ssize_t as the index type
References: <43ef0792$0$11891$9b622d9e@news.freenet.de>
Message-ID: <*firstname*nlsnews-5E510A.14573712022006@news.verizon.net>

In article <43ef0792$0$11891$9b622d9e at news.freenet.de>,
 "Martin v. L?wis" <martin at v.loewis.de> wrote:
 ...
> Discussion
> ==========
> 
> Why not size_t
> --------------
> 
> An initial attempt to implement this feature tried to use
> size_t. It quickly turned out that this cannot work: Python
> uses negative indices in many places (to indicate counting
> from the end). Even in places where size_t would be usable,
> to many reformulations of code where necessary, e.g. in ...
  ^-
    |
Minor typo:  "too"
________________________________________________________________________
TonyN.:'                        *firstname*nlsnews at georgea*lastname*.com
      '                                  <http://www.georgeanelson.com/>


From eels at nikocity.de  Tue Feb  7 07:00:14 2006
From: eels at nikocity.de (eels)
Date: 7 Feb 2006 04:00:14 -0800
Subject: get list of files
References: <1139311759.603645.13790@f14g2000cwb.googlegroups.com>
	<mailman.1541.1139312207.27775.python-list@python.org>
Message-ID: <1139313614.499483.92160@z14g2000cwz.googlegroups.com>

Hello Fredrik,

thank's for your quick help.
Greetings Eels

Fredrik Lundh schrieb:

> "eels" wrote:
>
> > I want to get a listing of my files at web server with ftp. I wantn 't
> > download the files.
> > With yyy = ftp.retrlines('LIST') I get this listing at stdout, but I
> > need this information at variable yyy.
> > How can I resolve this problem?
>
> as mentioned in the documentation, you need to provide a callback if
> you want to collect the data from a retr operation.
>
>    yyy = []
>    ftp.retrlines("LIST", yyy.append)
>
> should do the trick.
> 
> (also see the dir and nlst methods)
> 
> </F>



From could.net at gmail.com  Fri Feb 17 22:48:27 2006
From: could.net at gmail.com (Frank Potter)
Date: Sat, 18 Feb 2006 11:48:27 +0800
Subject: Delete a file
In-Reply-To: <fc5d4c490602171457p6c54193at@mail.gmail.com>
References: <fc5d4c490602171457p6c54193at@mail.gmail.com>
Message-ID: <311b5ce10602171948sa2e75c5g7b20f802daf4f556@mail.gmail.com>

system.remove(filename)

On 2/18/06, Sbaush <sbaush at gmail.com> wrote:
> Hi.
> In my application i create a PNG image and i view it in a frame.
> How can delete it from my python code?
> Bye...
>
> --
> Sbaush
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>


From bearophileHUGS at lycos.com  Sun Feb 12 06:03:20 2006
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 12 Feb 2006 03:03:20 -0800
Subject: Is python very slow compared to C
In-Reply-To: <pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
Message-ID: <1139742200.155197.245490@g14g2000cwa.googlegroups.com>

Steven D'Aprano>Very slow to do what, compared to what? The decay time
of the tau meson?<

Probably every answer I can give you is wrong for you, so answering is
almost useless... In this thread we have already given the most
pertinent answers to the original question from Diffuse.
I can show you this page, but I think this is useless too for you:
http://shootout.alioth.debian.org/gp4/benchmark.php?test=all&lang=python&lang2=ocaml

And, by the way, this is false:
Robert Hicks>Python is fast enough for just about anything you want to
do with it.<

If you are on a Unix-like OS, then the page about Weave from SciPy can
show you that sometimes Python isn't quick enough.

Bye,
bearophile



From robert.kern at gmail.com  Tue Feb 21 16:01:22 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 21 Feb 2006 15:01:22 -0600
Subject: deriving from float or int
In-Reply-To: <1140555253.262485.214100@z14g2000cwz.googlegroups.com>
References: <1140502954.660120.174160@g14g2000cwa.googlegroups.com>	<slrndvlfts.9se.sybrenUSE@schuimige.unrealtower.org>
	<1140555253.262485.214100@z14g2000cwz.googlegroups.com>
Message-ID: <dtfv32$u92$1@sea.gmane.org>

Russ wrote:
> The problem is that when I derive a new class from float, the darn
> thing won't let me create a constructor that accepts more than one
> argument. I need two arguments: one for the numerical value and one for
> the units. But when I try to give the constructor two arguments, I get
> this when I call the constructor:
> 
> TypeError: float() takes at most 1 argument (2 given)
> 
> In other words, python doesn't seem to want to let me "extend" the
> float type. I don't understand the reason for that, but I assume there
> is a reason.

http://www.python.org/2.2.3/descrintro.html#__new__

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From pietro.campesato at gmail.com  Tue Feb 21 16:54:00 2006
From: pietro.campesato at gmail.com (Pietro Campesato)
Date: 21 Feb 2006 13:54:00 -0800
Subject: Python vs. Lisp -- please explain
In-Reply-To: <pan.2006.02.19.08.00.50.166399@REMOVETHIScyber.com.au>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<pan.2006.02.19.08.00.50.166399@REMOVETHIScyber.com.au>
Message-ID: <1140558840.863939.11820@g47g2000cwa.googlegroups.com>

> As they say, case is the difference between "I helped my
> Uncle Jack off a horse" and "I helped my uncle jack off a horse."

Hahaha!... never heard of that though



From webraviteja at gmail.com  Mon Feb  6 01:58:23 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 5 Feb 2006 22:58:23 -0800
Subject: Compiling
In-Reply-To: <43E6493B.2050503@v.loewis.de>
References: <mailman.1387.1138986082.27775.python-list@python.org>
	<43e392d1$0$31853$626a54ce@news.free.fr>
	<mailman.1390.1138988111.27775.python-list@python.org>
	<43e3972f$0$624$626a14ce@news.free.fr>
	<1139149306.188367.193770@g47g2000cwa.googlegroups.com>
	<43E6493B.2050503@v.loewis.de>
Message-ID: <1139209103.702078.156180@g47g2000cwa.googlegroups.com>

> So while it would be possible to apply the same strategy to
> Python, it likely wouldn't gain any performance increase over
> the interpreter.

Thanks,
That was quite illustrative. But as I posted elsewhere, I am looking at
the other advantages of native compilation rather than speed. Python's
ability to interface with C code is quite good and I am happy to simply
do the performance critical parts in it although I rarely end up
needing to do that. But more often I am looking to use Python libraries
in other languages since I am more familiar with them and they
typically tend to be more high level (the way I like it) than the
standard libraries of others.

Perhaps someone already has a tool that simplifies / automates creating
DLLs that embed and export Python functions as C prototypes. This was
discussed in Pyrex mailing list a while ago.



From steve at holdenweb.com  Wed Feb 22 00:57:53 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 22 Feb 2006 00:57:53 -0500
Subject: a little more help with python server-side scripting
In-Reply-To: <8t-dndPM0buNZmbeRVn-rA@rcn.net>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>	<mailman.2280.1140581372.27775.python-list@python.org>	<JpidnVpklc7cembenZ2dnUVZ_tmdnZ2d@rcn.net>	<mailman.2284.1140586348.27775.python-list@python.org>
	<8t-dndPM0buNZmbeRVn-rA@rcn.net>
Message-ID: <dtguh1$vlh$1@sea.gmane.org>

John Salerno wrote:
> Steve Holden wrote:
> 
> 
>>If the script ran, you will now know waht version of Apaceh you're 
>>running with!
> 
> 
> Well, the script did seem to run, but I'm still not sure if this is what 
> I'm ultimately after. This allows me to run Python script files, which 
> is good, but what I really want to do is write bits of Python code in my 
> HTML files (as a means to include headers and footers, for example). So 
> these bits of Python code will basically be like a PHP include() 
> function that calls another HTML file which contains the header/footer 
> HTML to insert into the calling file. This type of situation doesn't 
> involve calling external Python scripts.
> 
> Maybe I can just try this also and see if it works, but I don't know the 
> code to use to write such an include statement. What would the 
> equivalent of this be in Python:
> 
> <?php include('file.html'); ?>
> 
> Thanks.

There are various ways you can do this, each of which depends on having 
a particular framework in place. Since your web service provider tells 
you that mod_python is available it's likely that you'll be able to use 
PSP (one of several beasts known as "Python Server Pages").

This is briefly described (for a flavor of the technology) in

   http://www.python.org/pycon/dc2004/papers/14/

by the author of mod_python. If you like what you see then take a look 
at the full mod_python documentation, at

   http://www.modpython.org/live/current/doc-html/

Note that purists might suggest this isn't the best way to use Python on 
the web. If it gets you where you want to be, feel free to ignore them :-)

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From john_sips_teaz at yahooz.com  Thu Feb 23 01:58:20 2006
From: john_sips_teaz at yahooz.com (John M. Gabriele)
Date: Thu, 23 Feb 2006 01:58:20 -0500
Subject: editor for Python on Linux
In-Reply-To: <dtai6e$23m$2@ariane.blic.net>
References: <dtai6e$23m$2@ariane.blic.net>
Message-ID: <G5dLf.426$qX4.359@fe10.lga>

Mladen Adamovic wrote:
> Hi!
> 
> I wonder which editor or IDE you can recommend me for writing Python 
> programs. I tried with jEdit but it isn't perfect.
> 

NEdit

-- 
(remove zeez if demunging email address)


From uymqlp502 at sneakemail.com  Thu Feb  9 15:47:17 2006
From: uymqlp502 at sneakemail.com (Russ)
Date: 9 Feb 2006 12:47:17 -0800
Subject: representing physical units
Message-ID: <1139518037.704683.99910@z14g2000cwz.googlegroups.com>

I know that python packages are available for representing physical
units, but I am getting frustrated trying to find them and determine
which is the best.

Rather than just using conventional dimensionless numbers with implicit
units, I would like to have a way to explicitly represent the units. If
incompatible units are added or subtracted, I would like to have an
error detected. Auto-conversions (e.g., from feet to miles) to enforce
consistency before adding or subtracting are not necessary. I would
even like to be able to multiply units. For example, I would like to
have meters returned when I multiply meters/second by seconds.

Where can I find a good package that does this? Thanks.



From y.glodt at sitasoftware.lu  Wed Feb  8 11:55:53 2006
From: y.glodt at sitasoftware.lu (Yves Glodt)
Date: Wed, 08 Feb 2006 17:55:53 +0100
Subject: Python threading, and processes
In-Reply-To: <pan.2006.02.08.13.18.20.728051@digital-crocus.com>
References: <pan.2006.02.08.13.18.20.728051@digital-crocus.com>
Message-ID: <43EA2299.8070607@sitasoftware.lu>

Robin Haswell wrote:
> Hey there
> 
> I'm doing some threading in python with Python 2.3 and 2.4 on Ubuntu and
> Debian machines, and I've noticed that if I open a lot of threads (say,
> 50), I get lots of python processes with individual PIDs, which consume a
> disproportionate amount of CPU. Does this mean that Python is using the
> dummy_thread module by accident? And is there a realistic limitation to
> the number of threads I can do?

Though I can not answer your question, I have however a similar 
situation here, on debian sarge.

I have a simple daemon that runs one thread, and I noticed that on our 
sarges with kernel 2.4 my daemon creates 4 processes, on the ones with 
kernel 2.6, only one process.

btw, I use the thread module.

best regards,
Yves

> Cheers
> 
> -Rob


From ntv1534 at gmail.com  Mon Feb 13 13:18:39 2006
From: ntv1534 at gmail.com (MooMaster)
Date: 13 Feb 2006 10:18:39 -0800
Subject: cx_Oracle string problems...
In-Reply-To: <1139852585.938381.247590@f14g2000cwb.googlegroups.com>
References: <1139850767.853237.122710@f14g2000cwb.googlegroups.com>
	<1139852585.938381.247590@f14g2000cwb.googlegroups.com>
Message-ID: <1139854719.427035.19820@g47g2000cwa.googlegroups.com>

Lol, that was a copy paste error into the post on my part...but the
problem has been fixed. Turns out that there was a string.replace call
somewhere else in the code that replaced all single quotes with empty
strings, which thus caused the singe quotes to disappear! Whoops!

Thanks for the look, though



From nickyncy at yahoo.com.hk  Wed Feb  8 11:55:22 2006
From: nickyncy at yahoo.com.hk (News)
Date: Thu, 9 Feb 2006 00:55:22 +0800
Subject: breadth first search
Message-ID: <43ea2271$1@127.0.0.1>

I am new in using Python

Anyone know how to implement breadth first search using Python?  Can Python
create list dynamically, I want to implement a program which will read data
from a file and store each line into a list, is this possible?

Please send mail to me at nickyncy at yahoo.com.hk or reply this mail

Thanks a lot!




From peter at engcorp.com  Thu Feb  2 08:40:15 2006
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 02 Feb 2006 08:40:15 -0500
Subject: webbrowser module + urls ending in .py = a security hole?
In-Reply-To: <1138873193.505531.125600@g49g2000cwa.googlegroups.com>
References: <1138593557.824516.116400@g14g2000cwa.googlegroups.com>	<1138626217.999480.153140@g43g2000cwa.googlegroups.com>	<1138651762.673682.192210@g43g2000cwa.googlegroups.com>	<mailman.1242.1138654889.27775.python-list@python.org>	<1138856193.857136.196670@g47g2000cwa.googlegroups.com>
	<1138873193.505531.125600@g49g2000cwa.googlegroups.com>
Message-ID: <drt23p$p5r$1@sea.gmane.org>

Fuzzyman wrote:
> Blair P. Houghton wrote:
>>webbrowser.py module's handling of http:// accesses
>>is definitely different from its handling of  file://  accesses.
> 
> It's worth working out if this is down to webbrowser.py *or* Firefox.
> Try launching firefox with the path to the py file and seeing what it
> does.
> 
> If it is webbrowser.py then it is worth fixing.

I'm not sure if my posts got through a couple of days ago, but I thought 
I already answered this.  webbrowser.py calls os.startfile(), which just 
passes things off to the OS.  If it's an http:// call, the registry 
entries point to Firefox (with a --url option, as I recall) but 
os.startfile() obviously doesn't always just load a web browser, so if 
the file happens to be a local .py file, it runs it.

I believe you'll get identical results if you pass the same url as you 
are passing webbrowser.py to the START command:

start "" "file:///c:/svn/ccvi86/main.py"

On my machine that runs the file.

start "" "http://www.engcorp.com/main/files/ixcore.py"

And that one displays the file in Firefox.

So the bug, if it can be called that, is that on Windows webbrowser.py 
doesn't do real work, but just passes responsibility to an underlying 
function which works as expected only for http: protocol stuff.

-Peter



From gm.voelkl at t-online.de  Tue Feb 28 13:30:58 2006
From: gm.voelkl at t-online.de (=?iso-8859-1?Q?G._V=F6lkl?=)
Date: Tue, 28 Feb 2006 19:30:58 +0100
Subject: Looking for Pythonic Examples
Message-ID: <du24t0$1cp$03$1@news.t-online.com>

Hello 

I am looking for examples of Pythonic Thinking:

One example I found:

Here some lines of the web side of Bruce Eckel:
http://www.mindview.net/WebLog/log-0053

How to read a text file:
for line in file("FileName.txt"):
  # Process line
It is a easy and sophisticated thing in python,
but hard to do or more complicated in other languages 
like java.

Does anyone know more examples ?

Does anyone know books about real good python programming ?

Best Regards

Gerhard


From markleeds at verizon.net  Sun Feb 26 21:23:34 2006
From: markleeds at verizon.net (MARK LEEDS)
Date: Sun, 26 Feb 2006 18:23:34 -0800
Subject: newbie trying understand sys.path
Message-ID: <000801c63b44$cf823630$2f01a8c0@m8d4477f3de884>

I  was trying to understand the concept of python looking for modules in sys.path.

So, as it said in "Beginning Python", I went into my .bashrc file and did

export PYTHONPATH=$PYTHONPATH:~/mytemp

then, i typed pprint.pprint(sys.path) and it worked.
it was in there !!!!!!!!!!!!!!!!!!!!!!!!

but, now I want to take it out.

i deleted the command from the .bashrc file and resourced it but it was still in there.

So, then I tried ( inside a python program )

sys.path = sys.path[1:]

and it works inside the program so that sys.path changed while the program was running.
 but, then i checked it again, by taking out the above command
and typing pprint.pprint(sys.path) and it was still there ?

Basically, my question is : Is there a permanent way of taking things out of sys.path that
you put in sort of by accident or for experimentation ?

Thanks.
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From jack at performancedrivers.com  Wed Feb 15 22:43:39 2006
From: jack at performancedrivers.com (Jack Diederich)
Date: Wed, 15 Feb 2006 22:43:39 -0500
Subject: Soduku
In-Reply-To: <1140058616.478084.117470@o13g2000cwo.googlegroups.com>
References: <1139967167.960780.171360@o13g2000cwo.googlegroups.com>
	<mailman.1932.1139968309.27775.python-list@python.org>
	<1140058616.478084.117470@o13g2000cwo.googlegroups.com>
Message-ID: <20060216034339.GN6479@performancedrivers.com>

On Wed, Feb 15, 2006 at 06:56:56PM -0800, Raymond Hettinger wrote:
> [Jack Diederich]
> > Is my math off or does 27ms mean 0.027 seconds? On my laptop (1.3GHz)
> > an empty python program takes 10ms to run (0.010 secs).  I ask out of
> > vanity, my own solver takes .15 seconds to run (20 seconds for a 16x16 grid).
> 
> Comparisons for individual puzzles are likely to be meaningless.  Any
> algorithm is at some point forced to try out assumptions from many
> possiblities.  A lucky or unlucky string of guesses would throw-off the
> comparisons.  Ideally, they should run hundreds of sample puzzles and
> include a good many that involve making mulitple levels of assumptions.
>  Some of the easy puzzles solve readily without a depth-first search
> (so a good chuck of the code may go unexercised).  Another comparison
> issue is the choice of data structures for input, working data, and
> output -- the accessing differing structures may cloud the comparison
> of difference algorithms.

True, especially for 9x9 grids.  I can make my solver go 'faster' by
eliminating the more complicated heuristics. There is extra overhead in
setting them up but the puzzle doesn't have to resort to them.  For 16x16
boards the extra bookkeeping reduces the search space dramatically.

> FWIW, my version is listed on ASPN:
>     http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/473893

Short and concise but .. what, no sets?!  
I used sets initially (each cell is a set object of int values) and 
was pleasantly surprised how fast it was.  Not leaving well enough alone
I wrote a C based set-alike that uses bit vectors to represent small
int sets (each bit is 0,1,2 .. sizeof(unsigned long)*7 - 1).
Despite the fact that or/and/sub are simple bit operations it is 
only 1/3rd faster than regular sets.  It doesn't cache and reuse objects
like sets; I'd like to think that is why it isn't faster still.

To compare different implementations (regular set vs bitset) of the same
strategy you have to record and playback any random-ish parts like taking
the first value of list(set-thing)[0].

I've been meaning to do a writeup. I'll try harder to find the time.

-Jack


From gherron at islandtraining.com  Sun Feb 12 11:27:09 2006
From: gherron at islandtraining.com (Gary Herron)
Date: Sun, 12 Feb 2006 08:27:09 -0800
Subject: Newbie
In-Reply-To: <v3JHf.2731$lo3.2501@trnddc07>
References: <v3JHf.2731$lo3.2501@trnddc07>
Message-ID: <43EF61DD.7060201@islandtraining.com>

LittlePython wrote:

>Is this a good place to post python questions from newbie's, or would you
>suggest another board?
>Thx
>  
>
This is the correct place.   This group has the reputation of being 
newbie-friendly. 

Gary Herron



From paschott at no.yahoo.spamm.com  Mon Feb  6 14:17:04 2006
From: paschott at no.yahoo.spamm.com (Peter A. Schott)
Date: Mon, 06 Feb 2006 19:17:04 GMT
Subject: Best way to capture output of another command-line program in Win32?
Message-ID: <qu7fu19vuoddfcn2fu3t23mfqg6536t6qn@4ax.com>

Not sure what I should do here.  I know that DOS/CMD can capture the output of
EXE files in Win32.  I know that os.popen() has been recommended for this, but
the couple of times I've tried, it didn't seem to work well.  I haven't had a
lot of need to do this recently, but we're trying to automate some processes
right now that require us to trap the output of a command line and react
accordingly.

Any suggestions on the best method for trapping this output?

Thanks.

-Pete


From paul at boddie.org.uk  Sun Feb 12 17:10:56 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 12 Feb 2006 14:10:56 -0800
Subject: Determining an operating system's default browser
References: <mailman.1690.1139528346.27775.python-list@python.org>
	<43EBD5E1.1040501@websafe.com>
	<mailman.1692.1139530731.27775.python-list@python.org>
	<1139572261.172035.194190@g14g2000cwa.googlegroups.com>
	<slrndusd7l.2t1.grahn+nntp@frailea.sa.invalid>
	<1139687069.810143.117040@g43g2000cwa.googlegroups.com>
	<slrnduv80a.2t1.grahn+nntp@frailea.sa.invalid>
Message-ID: <1139782256.033961.210900@g44g2000cwa.googlegroups.com>

Jorgen Grahn wrote:
> On 11 Feb 2006 11:44:29 -0800, Paul Boddie <paul at boddie.org.uk> wrote:
> >
> > Indeed. Thanks for reminding me about mailcap/metamail - I used them in
>
> And thanks for mentioning the real name of that mechanism!

Happy memories! ;-)

[...]

> > import mailcap
>
> I guess I shouldn't be surprised that there is a standard module
> for that ... ;-)

It's another stop on the standard library mystery tour!

[...]

> > Sadly, when considering my KDE desktop's default browser, inquiring the
> > application for HTML files yields Mozilla Firefox from my mailcap file.
>
> Yes, but that's only because you haven't configured your mailcap, right?
> Which might be a real problem -- most people don't touch their .mailcaps,
> especially those who use KDE or Gnome.

Going by the following discussion, they abandoned interoperability with
mailcap and went with their own cocktail of new inventions:

https://listman.redhat.com/archives/xdg-list/2003-April/msg00009.html

The above message is where the mailcap-related arguing begins. It boils
over here:

https://listman.redhat.com/archives/xdg-list/2003-April/msg00031.html

> Also, sometimes you want a GUI browser to open, and sometimes you want a
> console-based one like lynx or w3m.  I guess most people who use mailcap do
> so because they use console-based mail readers, and thus want the HTML stuff
> appear inside the same terminal.  Another reason this might be unsuitable
> for the OP.
>
> So, while I called it "The One Correct Way" above, I admit it might not be a
> very good way ;-)

If there's one "correct" way, it would seem that the xdg people are
always interested in making at least one other "correct" way.
Nevertheless, in defence of the desktop module, its purpose is merely
to "open" things in the context of the current desktop: correct or
standards compliant file type identification doesn't necessarily enter
the picture. ;-)

Still, in the supported environments, desktop.open should do what the
user would expect, given the preference those environments typically
have for their "new and improved" way of doing things involving
configuration dialogues that the user might well have seen (and
probably closed very quickly in horror). Sadly, it doesn't seem to
involve mailcap files, however.

Paul



From bbands at gmail.com  Fri Feb  3 18:48:25 2006
From: bbands at gmail.com (BBands)
Date: 3 Feb 2006 15:48:25 -0800
Subject: Fuzzy Lookups
In-Reply-To: <446r5pFl87rU1@uni-berlin.de>
References: <1138635665.956131.130630@f14g2000cwb.googlegroups.com>
	<446r5pFl87rU1@uni-berlin.de>
Message-ID: <1139010505.954403.251800@g44g2000cwa.googlegroups.com>

Diez B. Roggisch wrote:
> I did a levenshtein-fuzzy-search myself, however I enhanced my version by
> normalizing the distance the following way:
>
> def relative(a, b):
>     """
>     Computes a relative distance between two strings. Its in the range
>     (0-1] where 1 means total equality.
>     @type a: string
>     @param a: arg one
<snip>

Hello,

I adapted your approach to my needs and thought you might like to see
the result

def LevenshteinRelative(a, b):
    """
    Returns the Levenshtein distance between two strings
    as a relative quantity in the range 1 to 0 where
    1.0 is a perfect match.
    """
    # Calculate the Levenshtein distance. (returns an integer)
    dist = LevenshteinDistance(a, b)
    # dist is at most the length of the longer string.
    max_dist = float(max(len(a), len(b)))
    # dist is always at least the difference of the sizes of the two
strings.
    min_dist = max_dist - float(min(len(a), len(b)))
    try: # If max_dist and min_dist are equal use simple form.
        relative = 1.0 - (dist - min_dist) / (max_dist - min_dist)
    except ZeroDivisionError:
        relative = 1.0 - dist / max_dist
    return relative 

Thanks,

     jab



From peter at engcorp.com  Sat Feb 18 10:00:06 2006
From: peter at engcorp.com (Peter Hansen)
Date: Sat, 18 Feb 2006 10:00:06 -0500
Subject: Photo Management Python Application
In-Reply-To: <dt4mv8+d0so@eGroups.com>
References: <dt4mv8+d0so@eGroups.com>
Message-ID: <dt7cpq$nog$2@sea.gmane.org>

Bill wrote:
> Does anyone know of a Python program that will re-name digital photo 
> files in a date-time format based on the date stamp of the file?

Not entirely sure.... since I can't parse the above sentence fully.

Could you please reread it and consider rephrasing it?  It really 
doesn't look like it makes sense as written.  (renaming _in_ a date-time 
format?  a format _based on_ the date stamp of a file?)

-Peter



From deets at nospam.web.de  Tue Feb 21 06:32:17 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 21 Feb 2006 12:32:17 +0100
Subject: DCOracle2: OCI error
References: <1140512929.421047.182510@o13g2000cwo.googlegroups.com>
	<1140517499.363129.218920@g44g2000cwa.googlegroups.com>
Message-ID: <460c58F8jm07U1@uni-berlin.de>

Chris wrote:

> Update: Instead of disconnect / reconnect, I made it so that in case of
> 1084 errors I rollback and retry the same INSERT again.
> It worked... It's not beautiful code but it's working.
> So really I think something's fishy in dco2.c
> If someone tell me what should be investigated I could look into the
> issue.

No idea, but could as well be OCI. We're working here with ORACLE 10g with
the java JDBC-driver - and already found an oracle-bug and a driver-bug. So
what I would recommend is looking into what dco2 actually does at that
point - if it only puts a thin layer above OCI, and the problems come from
there.

Diez


From ralf at tecont.de  Sat Feb 11 17:11:00 2006
From: ralf at tecont.de (Ralf Muschall)
Date: Sat, 11 Feb 2006 23:11:00 +0100
Subject: Shortest prime number program
In-Reply-To: <dsl4ae$l97$1@online.de>
References: <1139652226.869102.310180@g14g2000cwa.googlegroups.com>
	<1139673716.241461.84110@g47g2000cwa.googlegroups.com>
	<dsl4ae$l97$1@online.de>
Message-ID: <l042c3-1lb.ln1@prcm.tecont.de>

Christoph Zwerschke wrote:
> dickinsm at gmail.com schrieb:
>> How about:

>> [2]+[x for x in range(1,99) if 2**x%x==2]

> If the range goes beyond 340, it also gives non-primes...

[2,3]+[x for x in range(1,99) if 2**x%x==2 and 3**x%x==3]
[2,3,5]+[x for x in range(1,99) if 2**x%x==2 and 3**x%x==3 and 5**x%x==5]

SCNR, Ralf

PS: They both break at 561, and further strengthening of the
condition will not help.  Manual loop unrolling as follows works:

[2,3,... <insert all primes here>]+[x for x in range(1,99) if False]

For sufficiently small values of 99, this will also be a rather
short program.


From gh at ghaering.de  Thu Feb 23 14:06:22 2006
From: gh at ghaering.de (=?ISO-8859-1?Q?Gerhard_H=E4ring?=)
Date: Thu, 23 Feb 2006 20:06:22 +0100
Subject: MySQLdb slow on MySQL 5
In-Reply-To: <1140716394.225560.27920@t39g2000cwt.googlegroups.com>
References: <1140716394.225560.27920@t39g2000cwt.googlegroups.com>
Message-ID: <43FE07AE.8040005@ghaering.de>

timothy.williams at nvl.army.mil wrote:
> Hi.
> 
> I have a Python program that parses a file and inserts records into a
> database with MySQLdb. I recently upgraded to MySQL 5.0.8, and now my
> parser runs *really* slow. Writing out to CSV files is fine, but when I
> try to insert the same records in a MySQL5 database, it slows to a
> crawl. Using MySQL 4.1 seems fine. The data seems to be inserted
> correctly, it's just really slow.
> 
> Has anyone else noticed a similar problem using MySQL5 and MySQLdb?

Maybe you're running in autocommit mode. I. e. an implicit COMMIT is 
done for each insert. This slows any database down.

Or are you calling commit() yourself too often?

-- Gerhard


From python.list at tim.thechases.com  Sat Feb  4 10:31:20 2006
From: python.list at tim.thechases.com (Tim Chase)
Date: Sat, 04 Feb 2006 09:31:20 -0600
Subject: numeric expression from string?
In-Reply-To: <43E4947B.2090204@bryant.edu>
References: <43E4947B.2090204@bryant.edu>
Message-ID: <43E4C8C8.3020800@tim.thechases.com>

> I have a string input from the user, and want to parse it
> to a number, and would like to know how to do it.  I
> would like to be able to accept arithmetic operations,
> like:
> 
> '5+5'
> '(4+3)*2'
> '5e3/10**3'
> 
> I thought of using eval, which will work, but could lead
> to bad security problems (not that it's a big  deal in my
> app, but still...)

I would use eval, as it does a whole lot of work for little 
cost.  I would simply whitelist stuff with a regexp before 
passing it to eval():

import re
tests = [('1*2', 2),('3+5/2', 5),
('8+5*21', 113),('3.14*2+20', 26.28),
('1/0', 0),('3**3yyp', 27),
('3*//+-p', 0)]
exp = r'[^-*/+.eE0-9()]'
r = re.compile(exp)
print "Using regexp: %s" % exp
for test, result in tests:
         s = r.sub('', test)
         try:
                 print "%s -> %s = %s (should be %s)"% (
			test, s,eval(s), result)
         except:
                 print "invalid expression: %s" % test



You can do more graceful handling of div-by-zero vs. general 
parsing errors here if you want, but you can get the general 
idea from this.  If you wanted, you could include "i" in the 
regexp, in case you expect your users to use imaginary 
numbers.  You could also include spaces if you wanted.

Simply crank their expression through the r.sub() call to 
clean it of garbage (you can check and compare them if you 
want to see if anything was changed in the process).  Then 
pass the results to eval()

My early-Saturday-morning thoughts...

-tkc








From singletoned at gmail.com  Fri Feb 10 10:49:20 2006
From: singletoned at gmail.com (Ed Singleton)
Date: Fri, 10 Feb 2006 15:49:20 +0000
Subject: Rethinking the Python tutorial
In-Reply-To: <dsfqv4$shc$1@wake.carmen.se>
References: <dsfqv4$shc$1@wake.carmen.se>
Message-ID: <34bb7f5b0602100749g4232510dp@mail.gmail.com>

On 09/02/06, Magnus Lycka <lycka at carmen.se> wrote:
> While the official Python Tutorial has served its
> purpose well, keeping it up to date is hardly anyones
> top priority, and there are others who passionately
> create really good Python tutorials on the web.
>
> I think 'A Byte of Python' by Swaroop C H is a good
> beginners tutorial, and 'Dive Into Python' by Mark
> Pilgrim is a good tutorial for more experienced
> programmers.
>
> My radical idea is that we mirror these at
> diveinto.python.org and byteof.python.org, and
> simply remove the old tutorial from the Python
> 2.5 (or 2.6?) docs. Give these two good texts an
> official status as the Python tutorials.
>
> Just as we want to adopt best of breed packages
> for the standard library, I think we should use
> best of breed documentation, and I think there are
> less backward compatibility issues with tutorials
> than with libraries. :)
>
> I think this change would give us better docs as
> well as a smaller maintenance burden. If a day
> comes when Mark Pilgrim or Swaroop C H don't want
> to maintain these texts, I strongly suspect that
> there are other tutorials we can replace them with
> if noone else steps in to keep them up to date.

How about putting the current tutorial into the wiki and seeing if
people start updating it?  I'm not saying it would work, but it might
have interesting effects...

Ed


From tjreedy at udel.edu  Wed Feb 15 18:26:48 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 15 Feb 2006 18:26:48 -0500
Subject: how to get function names from the file
References: <1140041022.500870.141430@g14g2000cwa.googlegroups.com>
Message-ID: <dt0ddg$91i$1@sea.gmane.org>


"Petr Jakes" <mcbooczech at gmail.com> wrote in message 
news:1140041022.500870.141430 at g14g2000cwa.googlegroups.com...
>I have got names of functions stored in the file. For the simplicity
> expect one row only with two function names: printFoo, printFOO
> In my code I would like to define functions and then to read function
> names from the file, so the functions can be executed in the order the
> function names are stored in a file.
>
> While trying to read the names from the file I am getting always
> "strings" and I am not able to execute them.
>
> I would like to write my code so it will look something like:
>
> def printFoo():
>    print "foo"
>
> def printFOO():
>    print "FOO"

Make a dict mapping names to functions:

funs = {'printFoo':printFoo, 'printFOO':printFOO}

> # here I would like to read the file with the function names sequences
> # and to create tuple which will contain the function names.
> # After that I would like to call functions from the tuple:

Actually, str.split, the easiest way to separate the multiple names on a 
line, gives you a list.  Same difference to 'for'.

funnames=('printFoo', 'printFOO')
for fname in funnames:
      funs[fname]()

Terry Jan Reedy





From felipe.lessa at gmail.com  Tue Feb 28 15:42:11 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Tue, 28 Feb 2006 17:42:11 -0300
Subject: Thread Question
In-Reply-To: <1209d5gqkhn1p41@corp.supernews.com>
References: <1141155072.500444.215130@v46g2000cwv.googlegroups.com>
	<1209cbiq1kjbh06@corp.supernews.com>
	<1141158663.553406.303780@t39g2000cwt.googlegroups.com>
	<1209d5gqkhn1p41@corp.supernews.com>
Message-ID: <1141159331.10021.10.camel@kenshin>

Em Ter, 2006-02-28 ?s 20:38 +0000, Grant Edwards escreveu:
> On 2006-02-28, D <duncanm255 at hotmail.com> wrote:
> 
> > Thanks, Grant.  I apologize for not being clear on what I
> > meant by using "classes".  This is an example of what I was
> > referring to:
> > http://www.wellho.net/solutions/python-python-threads-a-first-example.html
> 
> Ah, I see.  I had forgotten that people subclass Thread like
> that.  It's mostly just a matter of style.  There aren't any
> practical differences that I can think of.

Within a class you can maintain lots of internal states and make it
easily changable by other threads. Sure, you could archive this with
functions, but IMHO it's not pythonic. But for simple cases both would
suffice.

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From enterr at gmail.com  Sat Feb 18 01:54:19 2006
From: enterr at gmail.com (Atanas Banov)
Date: 17 Feb 2006 22:54:19 -0800
Subject: commenting out blocks of code
References: <20060217231846.87613.qmail@web36708.mail.mud.yahoo.com>
	<mailman.2077.1140221554.27775.python-list@python.org>
	<pan.2006.02.18.01.36.05.856023@REMOVETHIScyber.com.au>
	<JiwJf.10683$yK1.3804@news-server.bigpond.net.au>
Message-ID: <1140245659.360215.253640@f14g2000cwb.googlegroups.com>

Neil Hodgson wrote:
> Hi Steven,

> > It is *easy* to detect when a line is already commented. It starts with a
> > #. The ~ is superfluous.
>
>     It is not usual to change a line from being code to being a comment
> as most lines of code make no sense as English text. If you do sometimes
> want to do this, the "#" key can be pressed at the beginning of a line.
> Ctrl+Q exists to allow commenting out sections of code that you do not
> want to be active. The "~" acts to differentiate these different uses of
> one language feature and makes it easy to apply the operation over
> ranges that include comments and then invert the operation.

hi.
here is something you both seems to have not considered: imagine you
make decision if ^Q has to comment or uncomment based on the 1st line
and not on each line individually in the block. so let's say i mark and
^Q this:
------------------
code1
#comment1
#comment2
code2
----------------

1st line is not commented, so i want to comment-out the whole blcok,
the result is
------------------
#code1
##comment1
##comment2
#code2
----------------

note how ## maintains where comments were. now, for the same selection,
^Q again? 1st character is #, so the editor is asked to uncomment,
dwim:
------------------
code1
#comment1
#comment2
code2
----------------

so there is a way to do it without #~ noise... now if we can only think
of how to do DWIM copy&paste :-)!

- nas



From pdr14 at comcast.net  Tue Feb 14 21:11:07 2006
From: pdr14 at comcast.net (pdr14 at comcast.net)
Date: 14 Feb 2006 18:11:07 -0800
Subject: processing limitation in Python
References: <1139935358.128826.58660@g14g2000cwa.googlegroups.com>
	<pan.2006.02.14.17.59.01.993689@REMOVETHIScyber.com.au>
Message-ID: <1139969467.764899.109450@g44g2000cwa.googlegroups.com>

Big help guys, thanks.  There does seem to be a problem with Pythons
IDLE.  If I run my oridgional program from a dos shell I can hit Ctrl-C
and free up the procesor,  But running it in IDLE just locks up the
computer.  Bad Windows.  Thanks for the help with a more efficent
algorythm.

David KG2LI



From jrivero at latinux.org  Mon Feb 20 20:01:39 2006
From: jrivero at latinux.org (Jesus Rivero - (Neurogeek))
Date: Mon, 20 Feb 2006 21:01:39 -0400
Subject: html parser  , unexpected '<' char in declaration
In-Reply-To: <1140473997.262973.149260@f14g2000cwb.googlegroups.com>
References: <1140473997.262973.149260@f14g2000cwb.googlegroups.com>
Message-ID: <43FA6673.5030906@latinux.org>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Sakcee wrote:
> html =
> '<html><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
> <head></head> <body bgcolor=#ffffff>\r\n Foo foo , blah blah
> </body></html>'
> 
> 

html =
	"""
	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN">
	<html>
	 <head>
	 </head>
         <body bgcolor="#ffffff">
		Foo foo , blah blah
	 </body>
	</html>
	"""

Try checking your html code. It looks really messy. ' char is not for
multiple line strings. You can try the code above.

As a suggestion, you should really focus on learning html basics ;)

Regards

Jesus (Neurogeek)

>>>>import htmllib
>>>>import formatter
>>>>parser=htmllib.HTMLParser(formatter.NullFormatter())
>>>>parser.feed(html)
> 
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "/usr/lib/python2.4/sgmllib.py", line 95, in feed
>     self.goahead(0)
>   File "/usr/lib/python2.4/sgmllib.py", line 165, in goahead
>     k = self.parse_declaration(i)
> File "/usr/lib/python2.4/markupbase.py", line 132, in parse_declaration
>     self.error(
>   File "/usr/lib/python2.4/htmllib.py", line 40, in error
>     raise HTMLParseError(message)
> htmllib.HTMLParseError: unexpected '<' char in declaration
> 
> 
> the error is generated by unclosed DOCTYPE declaration
> 
> what is the best way to handle this kind of document. should I use
> regex to check and strip, or does HTMLParser offers something? , can i
> override default sgmllib behaviour
> I have to work with this htmllib because of existing modules .
> 
> 
> thanks
> 

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.1 (GNU/Linux)
Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org

iD8DBQFD+mZzdIssYB9vBoMRAoWXAJ9KuAnLLXhZVv4t6fDBpu3RW6oxFgCeM/1S
iNScofTDdJxLfOkaAR9Ejws=
=+LTo
-----END PGP SIGNATURE-----


From johnjsal at NOSPAMgmail.com  Wed Feb 22 00:42:50 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 22 Feb 2006 00:42:50 -0500
Subject: a little more help with python server-side scripting
In-Reply-To: <mailman.2282.1140582487.27775.python-list@python.org>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>	<1140571718.278297.105080@f14g2000cwb.googlegroups.com>	<TNidnXChVrTve2beRVn-pQ@rcn.net>
	<mailman.2282.1140582487.27775.python-list@python.org>
Message-ID: <VoydnSPLv4iEZ2beRVn-pg@rcn.net>

Steve Holden wrote:

>> Where does this line go? Just at the top as well?
> 
> Nope. I presume you can log in to your web server using ssh or telnet or 
> similar. In which case you do so. Then use the commands
> 
> cd {wherever}/cgi-bin
> chmod +x test.py
> 
> to make the script executable, and therefore recognised as a proper 
> script by Apache.

I'm afraid I still don't understand. I guess this step isn't necessary, 
since the script seemed to run anyway, but I'd like to know this anyway. 
The way I log into my server space is by an FTP program, so I don't see 
an occasion to actually *type* in any kind of commands.


From neuzhoundxx at yahoo.com  Wed Feb 15 17:07:06 2006
From: neuzhoundxx at yahoo.com (john peter)
Date: Wed, 15 Feb 2006 14:07:06 -0800 (PST)
Subject: logging problem on Windows XP
Message-ID: <20060215220706.35649.qmail@web36701.mail.mud.yahoo.com>

i'm using python's logging facilities in all of my application modules.
  my logging.conf file is:
  [loggers]
keys=root
  [handlers]
keys=roth
  [formatters]
keys=simpleFormatter
  [logger_root]
level=DEBUG
handlers=roth
  [handler_roth]
class=handlers.RotatingFileHandler
level=DEBUG
formatter=simpleFormatter
args=('adssim.log','w', 2000000, 4)
  [formatter_simpleFormatter]
format=%(asctime)s - %(message)s
datefmt=%Y-%m-%d %H:%M:%S
   
  i'm "creating" a logger in my adslogging module in the following way:
  import logging
import logging.config
  
logging.config.fileConfig("logging.conf")
logger = logging.getLogger("root")
   
  all my app modules import the adslogging module, and refer to the logger
  as adslogging.logger and perform stuff like adslogging.logger.debug(msg1)
  or adslogging.logger.info(msgN)
   
  although i'm not explicitly closing the logfile and i don't think the logfile size has
  maxed out (i see one logfile under my app directory with size 31K), i'm getting the following error messages in windows xp. what might i be doing wrong?
   
   
  C:\adssim1>python adstest.py 19.52.160.171 139 W04

Traceback (most recent call last):
  File "C:\Python24\lib\logging\handlers.py", line 71, in emit
    if self.shouldRollover(record):
  File "C:\Python24\lib\logging\handlers.py", line 143, in shouldRollover
    self.stream.seek(0, 2)  #due to non-posix-compliant Windows feature
ValueError: I/O operation on closed file
Traceback (most recent call last):
  File "C:\Python24\lib\logging\handlers.py", line 71, in emit
    if self.shouldRollover(record):
  File "C:\Python24\lib\logging\handlers.py", line 143, in shouldRollover
    self.stream.seek(0, 2)  #due to non-posix-compliant Windows feature
ValueError: I/O operation on closed file
Traceback (most recent call last):
  File "C:\Python24\lib\logging\handlers.py", line 71, in emit
    if self.shouldRollover(record):
  File "C:\Python24\lib\logging\handlers.py", line 143, in shouldRollover
    self.stream.seek(0, 2)  #due to non-posix-compliant Windows feature
ValueError: I/O operation on closed file
Traceback (most recent call last):
  File "C:\Python24\lib\logging\handlers.py", line 71, in emit
    if self.shouldRollover(record):
  File "C:\Python24\lib\logging\handlers.py", line 143, in shouldRollover
    self.stream.seek(0, 2)  #due to non-posix-compliant Windows feature
ValueError: I/O operation on closed file
Traceback (most recent call last):
  File "C:\Python24\lib\logging\handlers.py", line 71, in emit
    if self.shouldRollover(record):
  File "C:\Python24\lib\logging\handlers.py", line 143, in shouldRollover
    self.stream.seek(0, 2)  #due to non-posix-compliant Windows feature
ValueError: I/O operation on closed file

   
   
   
   

		
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From robert.kern at gmail.com  Fri Feb 10 11:22:05 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 10 Feb 2006 10:22:05 -0600
Subject: Scientific Computing with NumPy
In-Reply-To: <1d987df30602100415o16ad3d02n71aca12686667ff@mail.gmail.com>
References: <ds7bvh$ab1$2@gemini.csx.cam.ac.uk>	<mailman.1482.1139225595.27775.python-list@python.org>	<ds7ch4$bj7$1@gemini.csx.cam.ac.uk>
	<1d987df30602100415o16ad3d02n71aca12686667ff@mail.gmail.com>
Message-ID: <dsiej9$h6a$1@sea.gmane.org>

linda.s wrote:
> where to download numpy for Python 2.3 in Mac?

I don't think anybody has a binary package compiled for you. However, if you
have gcc installed, numpy should build out-of-box.

$ tar zcf ~/downloads/numpy-0.9.4.tar.gz
$ cd numpy-0.9.4
$ python setup.py build
$ sudo python setup.py install --install-scripts=/usr/local/bin

Note: the sudo in that last command is only necessary if your user account does
not have write access to /usr/local/bin

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From fuzzyman at gmail.com  Fri Feb 10 06:50:19 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 10 Feb 2006 03:50:19 -0800
Subject: Determining an operating system's default browser
In-Reply-To: <mailman.1690.1139528346.27775.python-list@python.org>
References: <mailman.1690.1139528346.27775.python-list@python.org>
Message-ID: <1139572219.769129.159070@g47g2000cwa.googlegroups.com>


John McMonagle wrote:
> Is there a python module which can determine an operating system's
> default web browser application.
>
> I would like to use it in the following context:  I have a GUI
> application where all the documentation is written as html pages.  I
> wish to have these html help pages open in the default browser when
> selected from the application's Help menu
>
> If python can determine the path to the default browser, I can then just
> spawn it.
>

The module webrowser module does this - and I use it for exactly this
purpose. :-)

Fuzzyman
http://www.voidspace.org.uk/python/index.shtml

> Regards,
>
> John McMonagle
>
>
>
>
> --
> This message has been scanned for viruses and
> dangerous content by MailScanner, and is
> believed to be clean.



From jonathon.blake at gmail.com  Mon Feb 20 03:45:05 2006
From: jonathon.blake at gmail.com (Jonathon Blake)
Date: Mon, 20 Feb 2006 08:45:05 +0000
Subject: Python vs. Lisp -- please explain
In-Reply-To: <pan.2006.02.19.22.27.59.152474@REMOVETHIScyber.com.au>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr> <yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<1140382936.808627.40300@o13g2000cwo.googlegroups.com>
	<pan.2006.02.19.22.27.59.152474@REMOVETHIScyber.com.au>
Message-ID: <c4797ebf0602200045n6d294b1eo@mail.gmail.com>

Steven wrote:

> And I'm just waiting for somebody to mention Forth,

Probably not the context you expected it to be mentioned in.

> > Yet one could potentially have that bytecode interpreter in hardware.
> Not potentially, in actuality. I know of only one example,

Shouldn't the Forth Chips from the late 70's and early 80's also get a
mention here?

xan

jonathon
--
Ethical conduct is a vice.
Corrupt conduct is a virtue.

Motto of Nacarima.

From sybrenUSE at YOURthirdtower.com.imagination  Tue Feb 28 03:23:42 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Tue, 28 Feb 2006 09:23:42 +0100
Subject: Python and Flash
References: <1139230361.675896.241920@z14g2000cwz.googlegroups.com>
	<1139235297.903689.244030@z14g2000cwz.googlegroups.com>
	<1139407620.948877.5820@g14g2000cwa.googlegroups.com>
	<1141101898.725832.104260@e56g2000cwe.googlegroups.com>
	<1141102008.086764.24550@j33g2000cwa.googlegroups.com>
Message-ID: <slrne0824e.9s8.sybrenUSE@schuimige.unrealtower.org>

SamFeltus enlightened us with:
> PS.  Here is an example...
>
> http://sonomasunshine.com/sonomasunshine/FrontPage.html

The HTML version of that site is crap, by the way. Check out 
http://sonomasunshine.com/cgi-bin/old_school.py?pagename=FrontPage

The HTML is sent as text/plain, and if interpreted as HTML, it's not
compliant with any HTML standard.

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From bronger at physik.rwth-aachen.de  Mon Feb 20 05:38:34 2006
From: bronger at physik.rwth-aachen.de (Torsten Bronger)
Date: Mon, 20 Feb 2006 11:38:34 +0100
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
Message-ID: <873bienwlx.fsf@wilson.homeunix.com>

Hall?chen!

bruno at modulix <onurb at xiludom.gro> writes:

> Torsten Bronger wrote:
>
>> [...]
>>
>> I've had such a discussion about TeX already, and my personal
>> conclusion was that you can defend almost any opinion in that
>> area.  However, one should ensure that the definitions make a
>> pragmatic and useful distinction.
>
> The only pragmatic and useful distinction I can see here is
> between languages that have to re-parse the whole source for each
> and every executions ('interpreted') and languages that don't.

Well, I think that it's fair to say that there are by principle deep
run time differences between CPython and, say, a typical
C++-compiled program.  Your definition would not reproduce that.  I
think it's also fair to say that these differences should be known
if somebody tries to find the best tool for a job.  After all, they
include advantages, too.

My definiton would be that an interpreted language has in its
typical implementation an interpreting layer necessary for typical
hardware.  Of couse, now we could discuss what is "typical",
however, in practice one would know it, I think.  In case of Python:
CPython and all important modern processors.

Tsch?,
Torsten.

-- 
Torsten Bronger, aquisgrana, europa vetus            ICQ 264-296-646


From felipe.lessa at gmail.com  Mon Feb 27 05:52:50 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Mon, 27 Feb 2006 07:52:50 -0300
Subject: PEP 354: Enumerations in Python
In-Reply-To: <7xoe0tozf8.fsf@ruckus.brouhaha.com>
References: <87accdplbj.fsf@rose.polar.local>
	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>
	<4402AB7F.7070804@REMOVEMEcyber.com.au>
	<7xzmkdxkce.fsf@ruckus.brouhaha.com>
	<mailman.2467.1141034300.27775.python-list@python.org>
	<7xoe0tozf8.fsf@ruckus.brouhaha.com>
Message-ID: <1141037570.3976.7.camel@kenshin>

Em Seg, 2006-02-27 ?s 02:42 -0800, Paul Rubin escreveu:
> Felipe Almeida Lessa <felipe.lessa at gmail.com> writes:
> > IMHO, you should be using sets, not enums. Something like:
> 
> If enums aren't supposed to work in that construction then the PEP
> shouldn't specify that they work that way.

Sorry, but where do they say that? 

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From mooquack at suad.org  Fri Feb  3 21:11:53 2006
From: mooquack at suad.org (Kirk McDonald)
Date: Fri, 03 Feb 2006 18:11:53 -0800
Subject: Global variables, Classes, inheritance
In-Reply-To: <uc08u1p09gleqcbasarcg1714rir7t0vrs@4ax.com>
References: <uc08u1p09gleqcbasarcg1714rir7t0vrs@4ax.com>
Message-ID: <43e40c68$1@nntp0.pdx.net>

DaveM wrote:
> Although I've programmed for fun - on and off - since the mid 70's, I'm
> definitely an OO (and specifically Python) beginner. 
> 
> My first question is about global variables. Are they, as I'm starting to
> suspect, a sin against God or just best avoided? Having got my current
> application working using them, I'm not sure whether I want to refactor it,
> but equally, I'd like to write the best code I can.

Python globals are actually remarkably safe, at least compared to some 
other languages. The key is that, when you import a module, its globals 
stay in its namespace. I've got nothing against them.

> 
> Secondly (and this is related),  if you have multiple instances of the same
> class, but need them all to have access to a dictionary created at run-time,
> is there a class way to this without calling the creation method multiple
> times? The best thought I've come up with is for the class instance to check
> its name and only if it's the first one do the dictionary creation, but I
> haven't tried it yet.

A class attribute would do this easily:

class Foo(object):
     d = {}

a = Foo()
b = Foo()
Foo.d = { 'a' : 'apple' }
print a.d
print b.d

That will print out {'a':'apple'} twice.

> 
> My third difficulty is with variables in a class. What's the difference
> between the following?:
> 
> class Foo:
>     i = 12345
>     ...
> 

i is a class attribute. It is bound to the class (which is, itself, an 
object). You can access i both from the class itself as well as from an 
instance of the class, i.e., Foo.i and Foo().i will both work.

> class Foo:
>     self.i = 12345
>     ...
> 

This does not work. There is no name 'self' bound to class Foo.

> class Foo:
>     def __init__(self):
>         self.i = 12345
>         ...
> 

This binds the name 'i' to all instances of class Foo; if this were C++, 
we'd call self.i a member variable.

> class Foo:
>     def __init(self):
>         i = 12345
>         ...
> 

(You forgot the trailing __, but whatever. :-) This binds the name 'i' 
to the local namespace of the __init__ function. It is just like any 
other local variable in a function.

Namespaces in Python are really great. It is worth reading up on 
globals() and locals() if you don't get them yet.

-Kirk McDonald


From fredrik at pythonware.com  Mon Feb  6 15:13:55 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 6 Feb 2006 21:13:55 +0100
Subject: threads and memory
References: <mailman.1500.1139245971.27775.python-list@python.org><c81fu1968nqolca5fon7kd3edica716rh3@4ax.com>
	<20060206124400.351bc0c8@tiger.ricis.com>
Message-ID: <ds8am6$61u$1@sea.gmane.org>

Lee Leahu wrote:
> > Yes. You don't need one thread per connection:
> > http://docs.python.org/lib/module-asyncore.html
>
> I am running into a problem where asyncore is through a filedescriptor
> error if I try to launch more that 1023 connections:
> ------------------------------------
> Traceback (most recent call last):
>   File "./test.py", line 46, in ?
>     asyncore.loop()
>   File "/usr/lib/python2.4/asyncore.py", line 192, in loop
>     poll_fun(timeout, map)
>   File "/usr/lib/python2.4/asyncore.py", line 122, in poll
>     r, w, e = select.select(r, w, e, timeout)
> ValueError: filedescriptor out of range in select()
> ------------------------------------
>
> Is there a limitation on the number of simultaneous connects that can
> be made with asyncore ?

what does "ulimit -n" (max number of file descriptors) say on your machine?

if it says 1024, that's what you're seeing.  to increase this, you
have to reconfigure your OS.

if you get a larger value, you can try passing use_poll=True to the
asyncore.loop function.

if use_poll doesn't work, you may have to rebuild Python's select
module to support more handles.  see the comments at the top of
Modules/selectmodule.c for details.

</F>





From larry.bates at websafe.com  Thu Feb 23 18:49:31 2006
From: larry.bates at websafe.com (Larry Bates)
Date: Thu, 23 Feb 2006 17:49:31 -0600
Subject: spaces at ends of filenames or directory names on Win32
In-Reply-To: <pan.2006.02.23.22.22.17.122779@REMOVETHIScyber.com.au>
References: <dtkuav$keb$1@solaris.cc.vt.edu> <43FE1B5E.8060009@websafe.com>
	<pan.2006.02.23.22.22.17.122779@REMOVETHIScyber.com.au>
Message-ID: <U5adnSstztOb12PenZ2dnUVZ_sOdnZ2d@comcast.com>


Steven D'Aprano wrote:
> On Thu, 23 Feb 2006 14:30:22 -0600, Larry Bates wrote:
> 
>> How about not naming files with leading and trailing spaces on
>> the Mac?  Seems like a bad habit that needs breaking ;-).
> 
> Why is it a bad habit? Because *Windows* is primitive enough that it can't
> cope with leading and trailing spaces? I don't see why Windows' lack is
> Mac users' problem.
> 
> 
It is a problem because the poster says it is a problem for him.
If they want to leave the files on a Mac, there is no problem.

IMHO leading and/or trailing spaces in filenames is asking for
incompatibilities with cross-platform file access.  Much like
using single-quote in filenames which are perfectly legal in
DOS/Windows, but Linux doesn't like much.

-Larry Bates


From paul at boddie.org.uk  Thu Feb 23 05:59:27 2006
From: paul at boddie.org.uk (Paul Boddie)
Date: 23 Feb 2006 02:59:27 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com> <43fbc788@usenet01.boi.hp.com>
	<87u0ar3gba.fsf@wilson.homeunix.com>
	<pan.2006.02.22.11.35.14.90948@REMOVETHIScyber.com.au>
	<1140612537.685150.68330@o13g2000cwo.googlegroups.com>
	<7xu0arbkwd.fsf@ruckus.brouhaha.com>
	<1140614911.243300.67200@g47g2000cwa.googlegroups.com>
	<1140617119.964479.200780@g44g2000cwa.googlegroups.com>
	<1140639827.967115.169180@g44g2000cwa.googlegroups.com>
Message-ID: <1140692367.189942.50520@z14g2000cwz.googlegroups.com>

Kay Schluehr wrote:
>
> I would say yes, it is still "proper Python" in that each RPython
> program is also a CPython program.

I suppose it depends on which direction you're coming from, in that
many Python programs just wouldn't be able to run in RPython. But then
I can understand the convenience of having a subset of Python that is
executable by CPython, but which can also be inspected and processed
for other purposes, and whose programs maintain their semantics in both
situations.

Paul



From steve at REMOVEMEcyber.com.au  Wed Feb 15 21:48:16 2006
From: steve at REMOVEMEcyber.com.au (Steven D'Aprano)
Date: Thu, 16 Feb 2006 13:48:16 +1100
Subject: Which is faster? (if not b in m) or (if m.count(b) > 0)
References: <1139976842.179801.285400@z14g2000cwz.googlegroups.com>
	<pan.2006.02.15.07.44.08.876338@gmx.net>
	<pan.2006.02.15.12.14.46.964790@REMOVETHIScyber.com.au>
	<45h1huF6hks7U1@individual.net>
Message-ID: <43F3E7F0.1070406@REMOVEMEcyber.com.au>

Georg Brandl wrote:

> Steven D'Aprano wrote:
> 
>>On Wed, 15 Feb 2006 08:44:10 +0100, Marc 'BlackJack' Rintsch wrote:
>>
>>
>>>In <1139976842.179801.285400 at z14g2000cwz.googlegroups.com>, Farel wrote:
>>>
>>>
>>>>Which is Faster in Python and Why?
>>>
>>>``if not b in m`` looks at each element of `m` until it finds `b` in it
>>>and stops then.  Assuming `b` is in `m`, otherwise all elements of `m` are
>>>"touched".
>>>
>>>``if m.count(b) > 0`` will always goes through all elements of `m` in the
>>>`count()` method.
>>
>>But the first technique executes in (relatively slow) pure Python, while
>>the count method executes (relatively fast) C code. So even though count
>>may do more work, it may do it faster.
> 
> 
> Why does "not b in m" execute in pure Python? list.__contains__ is implemented
> in C code as well as list.count.

Thank you to Kent Johnson for actually *timing* the two 
pieces of code with various sets of data, cutting 
through all the wild guesses (including mine). Which 
was my point.

To answer Georg's question, perhaps I was wrong -- I 
was under the impression that "target in source" 
executes more or less like:

for obj in source:
     if target == obj: return True
return False

Perhaps this was only true in older versions of Python, 
or perhaps I was misinformed, or perhaps I imagined the 
whole thing.

The important lesson is that your intuitions about what 
will be fast are not necessarily correct, and all the 
theorizing in the world is no substitute for good 
testing. (On the other hand, lousy testing is 
practically worthless.)


-- 
Steven.



From xkubic23 at stud.fit.vutbr.cz  Wed Feb  8 09:57:08 2006
From: xkubic23 at stud.fit.vutbr.cz (Radek Kubicek)
Date: Wed, 08 Feb 2006 15:57:08 +0100
Subject: What editor shall I use?
In-Reply-To: <1139410110.389122.215400@z14g2000cwz.googlegroups.com>
References: <1139410110.389122.215400@z14g2000cwz.googlegroups.com>
Message-ID: <dsd0s6$1sps$1@boco.fee.vutbr.cz>

> What editor shall I use if my Python script must contain utf-8
> characters?
> I use XP

vim :-)

> Thank you for reply
> l.b.

not for all :-)


From Peter.Mayne at hp.com  Tue Feb 21 07:25:02 2006
From: Peter.Mayne at hp.com (Peter Mayne)
Date: Tue, 21 Feb 2006 23:25:02 +1100
Subject: Python vs. Lisp -- please explain
In-Reply-To: <873bienwlx.fsf@wilson.homeunix.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com>
Message-ID: <43fbc788@usenet01.boi.hp.com>

Torsten Bronger wrote:
> 
> My definiton would be that an interpreted language has in its
> typical implementation an interpreting layer necessary for typical
> hardware.  Of couse, now we could discuss what is "typical",
> however, in practice one would know it, I think.  In case of Python:
> CPython and all important modern processors.

In a previous century, I used something called UCSD Pascal, which at the 
time was a typical implementation of Pascal. It ran on (amongst other 
things) an Apple ][, which at the time was typical hardware. It worked 
by compiling Pascal source to bytecode (called p-code), and interpreting 
the p-code. So, in practice, one would know that Pascal was an 
interpreted language.

Later on, I used a typical implementation called VAX Pascal: a compiler 
reduced Pascal source to VAX object code. In practice, Pascal was not an 
interpreted language. Of course, more than one of the VAXen we had did 
not implement the entire VAX instruction set, and some instructions were 
emulated, or interpreted, if you will, by other VAX instructions. So, in 
practice, some of the Pascal was interpreted.

And, as someone in this thread has pointed out, it is likely that your 
important modern (x86) processor is not natively executing your x86 
code, and indeed meets your definition of having "in its typical 
implementation an interpreting layer necessary for typical hardware".

Another example: is Java the bytecode, which is compiled from Java the 
language, interpreted or not? Even when the HotSpot JIT cuts in? Or when 
a native Java processor is used? Or when your Java program is compiled 
with GCJ (if GCJ does what I think it does)? Does this make Java an 
interpreted language or not?

Personally, in practice I don't care, so don't ask me. Ponder on getting 
angels to dance on the head of a pin before you worry about whether the 
dance can be interpreted or not.

PJDM


From reply.in.the.newsgroup at my.address.is.invalid  Thu Feb 16 04:09:42 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Thu, 16 Feb 2006 10:09:42 +0100
Subject: Databases and python
References: <pan.2006.02.14.08.06.18.754312@dcs.nac.uci.edu>
Message-ID: <gtf8v1dmu147otntn4ghm9biavq01feuhr@4ax.com>

Dan Stromberg:
>is there a python database interface that would allow me to define a 
>-lot- of tables?  Like, each word becomes a table, and then the fields 
>in that table are just the filenames that contained that word.

Give ZODB a try. 
http://www.zope.org/Wikis/ZODB/FrontPage
http://www.python.org/workshops/2000-01/proceedings/papers/fulton/zodb3.html

My first attempt would be: a BTree with the word as key, and a 'list of
filenames' as value.
http://www.zope.org/Wikis/ZODB/FrontPage/guide/node6.html#SECTION000630000000000000000

-- 
Ren? Pijlman


From grante at visi.com  Fri Feb  3 10:19:22 2006
From: grante at visi.com (Grant Edwards)
Date: Fri, 03 Feb 2006 15:19:22 -0000
Subject: would it be feasable to write python DJing software
References: <1138925819.465108.181760@o13g2000cwo.googlegroups.com>
	<druc1r$cre$1@bagan.srce.hr>
	<1138962918.427815.70300@g14g2000cwa.googlegroups.com>
	<drvdq6$gjq$1@bagan.srce.hr>
Message-ID: <11u6t3qc13jplad@corp.supernews.com>

On 2006-02-03, Ivan Voras <ivoras at __yahoo__.com_> wrote:
> simonwittber at gmail.com wrote:
>
>> Actually, manipulating and mixing audio samples can be both fast and
>> elegant, in Python, if you use Numeric or a similar library.
>
> ... at which point you're actually doing it in C, not pure python... :)

If that's the way you want to look at it, there is nothing that
can be done in pure python.  Both the built-ins and the basic
operators and sematics are implimented in C.  Unless you're
running Jython on a platform that has a hardware JVM, I
suppose.  But noboby in this discussion is doing that.

-- 
Grant Edwards                   grante             Yow!  Should I get
                                  at               locked in the PRINCICAL'S
                               visi.com            OFFICE today -- or have
                                                   a VASECTOMY??


From dreedmac at columbus.rr.com  Thu Feb  9 16:21:51 2006
From: dreedmac at columbus.rr.com (David Reed)
Date: Thu, 9 Feb 2006 16:21:51 -0500
Subject: New editions of several Python books.
In-Reply-To: <dsgaeq$rnq$1@daisy.noc.ucla.edu>
References: <dsfplv$ptp$1@wake.carmen.se> <dsgaeq$rnq$1@daisy.noc.ucla.edu>
Message-ID: <FFBD3D68-C609-445B-BA31-520D1BB2F730@columbus.rr.com>


On Feb 9, 2006, at 3:59 PM, James Stroud wrote:

> Magnus Lycka wrote:
>> Programming Python, 3rd edition
>> by Mark Lutz (Paperback - July 2006)
>>
>> Never a favourite of mine really, but a popular book...
>
> This one is like broccoli. Its good for you but it doesn't have  
> much flavor.
> -- 
> http://mail.python.org/mailman/listinfo/python-list

I found the Learning Python book (that Lutz is a co-author of) a much  
better book for someone who knows another language and wants to learn  
Python. The Programming Python has lots of examples, but I found it  
difficult to "look things up".

The three books I would recommend for someone (who already knows  
another language) wanting to learn Python are:

Learning Python
Python Essential Reference
Python Cookbook

Dave



From 63q2o4i02 at sneakemail.com  Sun Feb 19 14:26:34 2006
From: 63q2o4i02 at sneakemail.com (63q2o4i02 at sneakemail.com)
Date: 19 Feb 2006 11:26:34 -0800
Subject: Python vs. Lisp -- please explain
In-Reply-To: <mailman.2117.1140328473.27775.python-list@python.org>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<mailman.2117.1140328473.27775.python-list@python.org>
Message-ID: <1140377194.254560.323270@g14g2000cwa.googlegroups.com>

Cool, thank you.  That's the answer I was looking for :)



From sbaush at gmail.com  Tue Feb 21 05:50:17 2006
From: sbaush at gmail.com (Sbaush)
Date: Tue, 21 Feb 2006 11:50:17 +0100
Subject: editor for Python on Linux
In-Reply-To: <43FAEEC0.6020402@esss.com.br>
References: <dtai6e$23m$2@ariane.blic.net>
	<chlhv15ktc4u3adv34sgk63tok5vl9j50q@4ax.com>
	<43F8DA72.8040808@sympatico.ca>
	<43fa2376$0$1149$7a628cd7@news.club-internet.fr>
	<43FAEEC0.6020402@esss.com.br>
Message-ID: <fc5d4c490602210250w1123e769k@mail.gmail.com>

My favourite is Kate, available on KDE but working great also on Gnome!

2006/2/21, Fabio Zadrozny <fabioz at esss.com.br>:
>
> Well... pydev has it: http://pydev.sf.net and pydev extensions goes much
> further: http://www.fabioz.com/pydev
>
> Cheers,
>
> Fabio
>
> jean-michel bain-cornu wrote:
>
> >>Boa-Constructor is an IDE rather than an editor.  Although it focuses
> >>on wxPython, it has a good editor.
> >>
> >>
> >Yes, some possibilities are pretty good, like for instance the
> >findAll/findInFiles keeping the results in a new tab (I never saw this
> >elsewhere). Another useful is having the debugger launching the
> >application in a separate process, an excellent way to avoid bugs
> >pollution coming into the IDE.
> >rgds
> >jm
> >
> >
>
>
> --
> Fabio Zadrozny
> ------------------------------------------------------
> Software Developer
>
> ESSS - Engineering Simulation and Scientific Software
> www.esss.com.br
>
> Pydev Extensions
> http://www.fabioz.com/pydev
>
> PyDev - Python Development Enviroment for Eclipse
> http://pydev.sf.net
> http://pydev.blogspot.com
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



--
Sbaush
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From scott.daniels at acm.org  Wed Feb  8 21:38:38 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Wed, 08 Feb 2006 18:38:38 -0800
Subject: still a valid book?
In-Reply-To: <14GdnZJ6l_e1AXfeRVn-pw@rcn.net>
References: <uUsGf.1584$No6.37778@news.tufts.edu>
	<1139445749.902210.323680@f14g2000cwb.googlegroups.com>
	<14GdnZJ6l_e1AXfeRVn-pw@rcn.net>
Message-ID: <43eaa9f9$1@nntp0.pdx.net>

John Salerno wrote:
> Jonathan Gardner wrote:
>> You may want to read
>> http://python.org/doc/2.4.2/whatsnew/whatsnew24.html to get an idea of
>> what has changed from 2.3 to 2.4 if you buy the 2.3 book.
>>
> 
> Yeah, I was looking at that, but it seems a little over my head right 
> now. I just didn't want to learn anything and then have to "unlearn" it. 
> I'm sure I will always be adding new things, so that isn't so much the 
> problem I guess.
Python remains _extremely_ compatible from one minor version to the next
(2.2 to 2.3, 2.3 to 2.4, ...) Python 3000 (which may well be Python 3.0)
is allowed to break compatibility, _but_ it won't be conceptual
compatibility; it will just discard "old stuff we no longer like."  I
would suggest you don't pay much attention to "old-style classes":
      class WhatEver:
         ...
and only use "new-style" classes:
     class SomeClass(object):
         ...
since the "old-style classes" are going away (the "class Name: ..."
syntax will start defining new-style classes as well).  Starting with
2.3 will put you quite near the modern edge, and the changes you will
have to learn are not that great. People are still running code written
under 1.5.2, so 2.3 is really quite modern.

--Scott David Daniels
scott.daniels at acm.org


From claudio.grondi at freenet.de  Tue Feb 28 06:05:37 2006
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Tue, 28 Feb 2006 12:05:37 +0100
Subject: bsddb3 database file, are there any unexpected file size limits
	occuring in practice?
In-Reply-To: <1141077930.320242.97990@v46g2000cwv.googlegroups.com>
References: <dtj9gc$b33$1@newsreader3.netcologne.de>
	<1140670193.599122.325800@z34g2000cwc.googlegroups.com>
	<dtk1u6$118$1@newsreader3.netcologne.de>
	<1141077930.320242.97990@v46g2000cwv.googlegroups.com>
Message-ID: <du1aq0$mv0$1@newsreader3.netcologne.de>

Klaas wrote:
> Claudio writes:
> 
>>I am on a Windows using the NTFS file system, so I don't expect problems
>>with too large file size.
> 
> 
> how large can files grow on NTFS?  I know little about it.
No practical limit on current harddrives. i.e.:
Maximum file size
   Theory:          16 exabytes  minus  1 KB (2**64 bytes minus  1 KB)
   Implementation:  16 terabytes minus 64 KB (2**44 bytes minus 64 KB)
Maximum volume size
   Theory:                                    2**64 clusters minus 1
   Implementation: 256 terabytes minus 64 KB (2**32 clusters minus 1)
Files per volume
   4,294,967,295 (2**32 minus 1 file)
> 
> 
>>(I suppose it in having only 256 MB RAM available that time) as it is
>>known that MySQL databases larger than 2 GByte exist and are in daily
>>use :-( .
> 
> 
> Do you have more ram now?  
I have now 3 GByte RAM on my best machine, but Windows allows a process 
not to exceed 2 GByte, so in practice a little bit less than 2 GByte are 
the actual upper limit.

I've used berkeley dbs up to around 5 gigs
> in size and they performed fine.  However, it is quite important that
> the working set of the database (it's internal index pages) can fit
> into available ram.  If they are swapping in and out, there will be
> problems.
Thank you very much for your reply.

In my current project I expect the data to have much less volume than 
the indexes. In my failed MySQL project the size of the indexes was 
appr. same as the size of the indexed data (1 GByte).
In my current project I expect the total size of the indexes to exceed 
by far the size of the data indexed, but because Berkeley does not 
support multiple indexed columns (i.e. only one key value column as 
index) if I access the database files one after another (not 
simultaneously) it should work without problems with RAM, right?

Do the data volume required to store the key values have impact on the 
size of the index pages or does the size of the index pages depend only 
on the number of records and kind of the index (btree, hash)?

In last case, I were free to use for the key values also larger sized 
data columns without running into the problems with RAM size for the 
index itself, else I were forced to use key columns storing a kind of 
hash to get their size down (and two dictionaries instead of one).

What is the upper limit of number of records in practice?

Theoretical, as given in the tutorial, Berkeley is capable of holding up 
to billions of records with sizes of up to 4 GB each single record with 
tables up to total storage size of 256 TB of data.
By the way: are billions in the given context multiple of 1.000.000.000 
or of 1.000.000.000.000 i.e. in US or British sense?

I expect the number of records in my project in the order of tens of 
millions (multiple of 10.000.000).

I would be glad to hear if someone has already successful run Berkeley 
with this or larger amount of records and how much RAM and which OS had 
the therefore used machine (I am on Windows XP with 3 GByte RAM).

Claudio

> 
> -Mike
> 


From spwpreston at gmail.com  Thu Feb  9 06:28:08 2006
From: spwpreston at gmail.com (S Borg)
Date: 9 Feb 2006 03:28:08 -0800
Subject: line wrapping problem
Message-ID: <1139484488.037165.106170@g43g2000cwa.googlegroups.com>

Hello,

 I am parsing text from one document to another. I have a scheme
similar to:

 for x in myfoobar:
   print >> mytextfile, "%s    " % mydictionary[x],   #all on same line
 print >> mytextfile, '\n'      #new line


I am getting line breaks before my explicit line break. Am I
unwittingly copying '\n' characters from the original file?
How should I fix this(What is the 'Pythonic' solution)?

thanks,
-S



From invalidemail at aerojockey.com  Tue Feb 28 06:39:44 2006
From: invalidemail at aerojockey.com (Carl Banks)
Date: 28 Feb 2006 03:39:44 -0800
Subject: C++ OpenGL rendering, wxPython GUI?
References: <1141118055.471718.90980@z34g2000cwc.googlegroups.com>
Message-ID: <1141126784.355235.8930@t39g2000cwt.googlegroups.com>

tobfon at gmail.com wrote:
> I'm creating a scientific visualization application with rather high
> demands on performance. I've created a nice rendering engine for it in
> C++/OpenGL and a python interface to the rendering engine. Now I'm
> looking to build a GUI in python with the rendering engine as an
> integrated window. I will most likely use wxPython for the GUI and I
> know it has support for adding an OpenGL canvas.
>
> After looking around in these groups and others it seems to me that
> most people doing 3D-applications simply opt to use PyOpenGL. Since my
> application uses VBOs, shader programs and similar things this is not
> an option for me.
>
> My rendering engine currently uses GLUT for window handling, but what I
> want to do is to create the canvas in python for use with wxPython and
> then somehow toss it down to C++ for rendering and avoid using GLUT at
> all. I've yet to come across an example of how this could be done.
>
> Maybe including wxWidgets in the C++ program and just using the
> wxPython-created canvas ID there will somehow be possible? I'll look
> into that but any help or ideas are most welcome.

You should be able to create and realize the OpenGL canvas (which will
create an OpenGL context), then make the OpenGL calls from C++ without
any worries.  Realizing (i.e., creating the window for) the canvas
would create the OpenGL context, and somewhere along the way the
context gets bound (probably during the canvas's draw callback).

BTW, though you can't use PyOpenGL for the VBO stuff, it might be
useful to install it anyways to do high-level stuff (set up flags,
position the camera, etc.).  Calls from C and PyOpenGL can be freely
mixed.

I've done similar things in GTK on Linux.  I had a gtkglarea canvas,
PyOpenGL, and my own C extension all making OpenGL calls.



Carl Banks



From onurb at xiludom.gro  Mon Feb 13 04:11:41 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Mon, 13 Feb 2006 10:11:41 +0100
Subject: Too Many if Statements?
In-Reply-To: <1139582415.317902.193610@f14g2000cwb.googlegroups.com>
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<6e2iu1hdb8fvlfkcuulloiiq1khlbhret1@4ax.com>
	<1139517959.741090.28560@g14g2000cwa.googlegroups.com>
	<43ec87cc$0$7212$626a54ce@news.free.fr>
	<1139582415.317902.193610@f14g2000cwb.googlegroups.com>
Message-ID: <43f04d6a$0$1408$626a54ce@news.free.fr>

slogging_away wrote:
> bruno at modulix wrote:
> 
> 
>>Looks like a memory problem then...
> 
> 
> The system I am using has 2GB of memory, (unless you are syaing the
> memory is faulty).

Nope, just that I don't know of any system with unlimited memory. BTW,
having 2GB of ram does not mean there are 2GB available for your program.

(And BTW, this is just one of the *possible* reasons of the problem
you've discovered. May be quite unrelated as well...)

>>Why storing error messages ? Why don't you just write'em out (be it to
>>stdout or to a file) ?
>  
> I guess I could do that, (write them to a file as they are discovered).

Well, this is how most programs do.

> Right now the error messages are stored in the array and then the the
> array is scanned via, a for loop and the error messages are written to
> several files in different formats based on the severity of the errors,
> (on a per device basis, a per severity basis, etc.).  This keeps the
> write statements to a minimum and in a central location of the script
> instead of having several statements for each individual error message
> spread throughout the script, (three write statements per error message
> at over 500 error messages would be a significant change).

This is a design problem, not an implementation problem. Just factor out
the part that do the error message dispatch into a function, then call
this function instead of storing the message. Or even better, use an
existing logging library...

> Not to complain but if I can't use arrays  then thats a pretty
> significant limitation.

Please understand that available memory is a limitation of the *system*
- you'd get the same limitation with *every* language ever (well, if you
know of a language that expand free ram ad infinitum, please let us know !-)


-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From nicogrubert at gmail.com  Tue Feb 14 07:21:27 2006
From: nicogrubert at gmail.com (Nico Grubert)
Date: Tue, 14 Feb 2006 13:21:27 +0100
Subject: Splitting a string
In-Reply-To: <mailman.6329.1139904303.27774.python-list@python.org>
References: <mailman.6329.1139904303.27774.python-list@python.org>
Message-ID: <43F1CB47.7040107@gmail.com>

 > re.split("(?i)\s*(and not|and|or)\s*", s)

Thanks, Frederik for the step by step howto! And also thanks to you, Dylan.

re.split("(?i)\s*(and not|and|or)\s*", s) is almost right.

I changed it to:
   words = re.split("(?i)\s*( and not | and | or )\s*", s)
in order to handle words containing "or" or "and".

s = 'More, J. or Black and Mand, R.' works now, too.

Thanks!


From gene.tani at gmail.com  Sun Feb 19 01:35:32 2006
From: gene.tani at gmail.com (gene tani)
Date: 18 Feb 2006 22:35:32 -0800
Subject: Python vs. Lisp -- please explain
In-Reply-To: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
Message-ID: <1140330932.931769.16750@g14g2000cwa.googlegroups.com>


63q2o4i02 at sneakemail.com wrote:

>
> I'm wondering if someone can explain to me please what it is about
> Python that is so different from Lisp that it can't be compiled into
> something as fast as compiled Lisp?  From this above website and
> others, I've learned that compiled Lisp can be nearly as fast as C/C++,
> so I don't understand why Python can't also eventually be as efficient?
>  Is there some *specific* basic reason it's tough?  Or is it that this
> type of problem in general is tough, and Lisp has 40+ years vs Python's
> ~15 years?
>
>

i'm not sure it'll answer question, but Brett cannon's thesis is good
background

http://www.ocf.berkeley.edu/~bac/thesis.pdf



From scott.daniels at acm.org  Fri Feb  3 12:30:20 2006
From: scott.daniels at acm.org (Scott David Daniels)
Date: Fri, 03 Feb 2006 09:30:20 -0800
Subject: Compiling
In-Reply-To: <mailman.1387.1138986082.27775.python-list@python.org>
References: <mailman.1387.1138986082.27775.python-list@python.org>
Message-ID: <43e3921b@nntp0.pdx.net>

Simon Faulkner wrote:
> ... why hasn't someone written a compiler for Python?
> I guess it's not that simple eh?


What would you call PyPy?

As to the idea of a python-to-machine code translator, the
benefit would not be very great without at least a PyPy
level of understanding of the code -- no simple translation
would be much faster than the CPython implementation.

By the way, be careful about your tone.  It sounds like
brick-throwing in this generally friendly newsgroup.

--Scott David Daniels
scott.daniels at acm.org


From arkanes at gmail.com  Tue Feb 21 09:36:50 2006
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 21 Feb 2006 08:36:50 -0600
Subject: Python vs. Lisp -- please explain
In-Reply-To: <1140490302.639049@jetspin.drizzle.com>
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk> <43f8cb3f$0$4225$626a54ce@news.free.fr>
	<87bqx3glb1.fsf@wilson.homeunix.com>
	<43f984dc$0$27151$626a54ce@news.free.fr>
	<873bienwlx.fsf@wilson.homeunix.com>
	<mailman.2160.1140440898.27775.python-list@python.org>
	<1140454473.335788@jetspin.drizzle.com>
	<pan.2006.02.20.21.59.12.636908@REMOVETHIScyber.com.au>
	<1140490302.639049@jetspin.drizzle.com>
Message-ID: <4866bea60602210636h64e02c74tda46083f22e86cff@mail.gmail.com>

On 2/20/06, Donn Cave <donn at drizzle.com> wrote:
> Quoth Steven D'Aprano <steve at REMOVETHIScyber.com.au>:
> ...
> | Nobody denies that Python code running with no optimization tricks is
> | (currently) slower than compiled C code. That's a matter of objective
> | fact. Nobody denies that Python can be easily run in interactive mode.
> | Nobody denies that *at some level* Python code has to be interpreted.
> |
> | But ALL code is interpreted at some level or another. And it is equally
> | true that at another level Python code is compiled. Why should one take
> | precedence over the other?
>
> I have no idea, what precedence?  All I'm saying is that Python matches
> what people think of as an interpreted language.  You can deny it, but
> but it's going to look like you're playing games with words, and to no
> real end, since no one could possibly be deceived for very long.  If you
> give me a Python program, you have 3 choices:  cross your fingers and
> hope that I have the required Python interpreter version, slip in a
> 25Mb Python interpreter install and hope I won't notice, or come clean
> and tell me that your program needs an interpreter and I should check to
> see that I have it.


You're correct as far as it goes, but can you provide a reasonable
definition for "interpreted" that matches the common usage? Most
people can't.

When asked to name some interpreted (or scripting) languages, they'll
name some off - perl, python, ruby, javascript, basic...

They won't say Java. Ask them why Python is interpreted and Java isn't
and you'll have a hard time getting a decent technical answer, because
Python isn't all that different from Java in that regard, especially
pre-JIT versions of Java.

Probably the most accurate definition of "interpreted" as it is used
in the wild is "one of these languages: perl, python, perl, ruby,
etc". That is, you're essentially claiming that Python is interpreted
because everyone thinks of it that way, technical correctness be
damned.

There is an obvious difference between Python and C. Nobody would deny
that. But it's a fairly hard thing to *quantify*, which is why people
make sloppy categorizations. That's not a problem as long as there
isn't prejudice associated with the categorization, which there is.

I wonder how "interpreted" people would think Python is if the
automagic compilation to .pyc was removed and you had to call
"pythonc" first.

>
>         Donn Cave, donn at drizzle.com
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From mtobis at gmail.com  Thu Feb  2 12:02:00 2006
From: mtobis at gmail.com (Michael Tobis)
Date: 2 Feb 2006 09:02:00 -0800
Subject: VB to Python migration
In-Reply-To: <KPtDf.150306$AP5.92261@edtnps84>
References: <DjyCf.110918$AP5.12355@edtnps84>
	<1138421531.231633.41140@z14g2000cwz.googlegroups.com>
	<drj04s$7c6$1@wake.carmen.se>
	<1138566539.478552.113180@g49g2000cwa.googlegroups.com>
	<drlckk$ete$1@wake.carmen.se> <KPtDf.150306$AP5.92261@edtnps84>
Message-ID: <1138899720.345985.182670@f14g2000cwb.googlegroups.com>

An incremental approach and a redesign are not the same thing. It might
be insurmountably difficult to acheeve both in a move to another
platform.

mt



From xavier.morel at masklinn.net  Tue Feb  7 15:19:23 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Tue, 07 Feb 2006 21:19:23 +0100
Subject: Dual Core outlook
In-Reply-To: <1139335428.970958.170320@o13g2000cwo.googlegroups.com>
References: <1139329268.695421.191340@g47g2000cwa.googlegroups.com>
	<dsajpk$c26$1@aphrodite.grec.isp.9tel.net>
	<1139335428.970958.170320@o13g2000cwo.googlegroups.com>
Message-ID: <dsav7k$hdq$1@aphrodite.grec.isp.9tel.net>

malv wrote:
> Maybe this is too simplistic, but given two programs, one in Python the
> other in Java or C#. Would this mean that running the latter on a dual
> core processor would significantly increase execution speed, whereas
> the Python program would be running in one processor only without any
> speed up?
> 
This is extremely dependent on the way the program is built.

To get significant increases in execution speed, you need multiple 
*computational* threads, that means that you need 2+ threads that do the 
heavy work (number crunching, compression, ...), if you have one thread 
with heavy computations and the others handling low-computation parts of 
the program (UI) you may get a more _responsive_ program, but it won't 
be _faster_ (at least not noticeably), because the bottleneck of the 
application (the heavy computations) will still run on a single 
core/processor.

Multicore/multiprocessor is not magic, and it's not trivial at all, it's 
hard to create correct multithreaded programs, and even harder to 
parallelize the heavy computation part between various threads.

> Is a Java program capable of this "out of the box" or does this require
> specific additional code?
> 
Java and C# both use unlocked OS threads any time you use their threads.


From a.schmolck at gmail.com  Wed Feb 22 15:05:49 2006
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: 22 Feb 2006 20:05:49 +0000
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<yfspsljp321.fsf@oc.ex.ac.uk>
	<1140425017.101462.117380@g47g2000cwa.googlegroups.com>
	<yfslkw5msih.fsf@oc.ex.ac.uk>
	<1140622216.436013.234400@g47g2000cwa.googlegroups.com>
	<yfsaccjl2kh.fsf@oc.ex.ac.uk> <dtibfr$f9p$1@news.doit.wisc.edu>
Message-ID: <yfszmkjjh0i.fsf@oc.ex.ac.uk>

Rocco Moretti <roccomoretti at hotpop.com> writes:

> I think it's worth pointing out that not all dynamicism is equal, when it
> comes to difficulty in compiling to machine code.

No kidding (do you have any idea how this thread started out?).

> Lisp, like the good functional language that it is, has (primarily) immutable
> values, and minimal side effects.
[further nonsense snipped]

Please don't spread misinformation about things about which you are clueless[1].

'as


Footnotes: 
[1]  Just as a minor illustrative detail: in python 2 out of 4 builtin
     collection types are immutable (tuples and strings; newer versions also
     have immutable and mutable sets) in CL 5 out of 5 are mutable
     (arrays/vectors/strings, hash-tables, cons cells).


From steve at REMOVETHIScyber.com.au  Sat Feb 25 22:19:09 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sun, 26 Feb 2006 14:19:09 +1100
Subject: "Temporary" Variable
References: <1140665472.203495.7570@g44g2000cwa.googlegroups.com>
	<43FD6645.3020201@REMOVEMEcyber.com.au>
	<1140725159.143882.202630@j33g2000cwa.googlegroups.com>
	<pan.2006.02.23.22.19.38.642977@REMOVETHIScyber.com.au>
	<ZmsLf.21067$915.1256@southeast.rr.com>
	<pan.2006.02.24.09.42.22.818116@REMOVETHIScyber.com.au>
	<eiDLf.21220$915.2746@southeast.rr.com>
	<1140818902.428065.282110@j33g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.26.03.19.09.61650@REMOVETHIScyber.com.au>

On Fri, 24 Feb 2006 14:08:22 -0800, darthbob88 wrote:

> Reply to all: I realize that naming a variable "spam" is not entirely
> kosherized. It was originally named secret, but I renamed it in a fit
> of whimsy. The language is named after Monty Python's Flying Circus, is
> it not? Remember the Spam Sketch.
> http://en.wikipedia.org/wiki/Spam_sketch

Absolutely!

And it is a fine thing to use Monty Python references as generic variables
in Python, instead of foo, bar, baz and so forth. 

All up, I'm surprised at the fuss made over a throw-away line.

> I thank you for finding the problem; I thought it might involve string
> v int comparisons when Comrade D'Eprano's code went wonky. 

My code went wonky?

> Many thanks, and good luck to you.
> PS: As for the inappropriate naming, the Swedes tried to sell their
> vacuums under the motto "Nothing sucks like an Electrolux."

Which is a wonderful, deliberately ironic advertising line. I love it!!!


-- 
Steven.



From robert.kern at gmail.com  Tue Feb 21 23:23:18 2006
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 21 Feb 2006 22:23:18 -0600
Subject: May i customize basic operator (such as 1==3)?
In-Reply-To: <l7onv1t5rpivgrutuhqpahu56ah113b7su@4ax.com>
References: <mailman.2279.1140579610.27775.python-list@python.org>
	<l7onv1t5rpivgrutuhqpahu56ah113b7su@4ax.com>
Message-ID: <dtgovn$acc$1@sea.gmane.org>

Casey Hawthorne wrote:
> I believe you are asking for a side effect from the "==" operator.
> 
> Add print statements to the __eq__ method.

The things is, he wants to make those modifications to builtin types, which he
can't do.

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



From lycka at carmen.se  Fri Feb 24 10:38:16 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 24 Feb 2006 16:38:16 +0100
Subject: a little more help with python server-side scripting
In-Reply-To: <nTELf.1667$No6.38886@news.tufts.edu>
References: <59edncmGm6g2LmbeRVn-pw@rcn.net>
	<dSoLf.1663$No6.38996@news.tufts.edu> <dtmhot$4t4$1@wake.carmen.se>
	<nTELf.1667$No6.38886@news.tufts.edu>
Message-ID: <dtn999$q66$1@wake.carmen.se>

John Salerno wrote:
> Maybe I'm misunderstanding what is meant when you say to use ASP. I'm 
> thinking that it involves having to learn another language (such as C# 
> with ASP.NET), instead of writing my code in Python. Is that not the case?

Nope. Just like CGI, ASP is language agnostic. It's a Microsoft
standard for embedding code in HTML pages. Look at the references
earlier in the thread and/or google for Python ASP.

Of course, the catch here is that your ISP might not have
enabled Python as a scripting language on the servers...

Finally, it's my impression that your ambition is to use some
kind of scripting to get a uniform look and navigation etc in
your web pages. This might not require any kind of dynamic
web site.

In that case I'd suggest that you simply make build some
Python tool on your own computer that builds a static version
of your entire web site in the safe and free environment of
your home. If you want to change something, you simply edit
a file at home, rebuild your site and upload the new files.

I've built a few sites like that, and if you don't really
need to serve anything but static pages, it's probably your
best bet.
  - It'll give you a snappy site. It just serves static pages.
  - You don't rely on any particular technology from your ISP,
    they just need FTP etc so that you can upload your files,
    and a plain web server.
  - You have the original content at home, so you always have
    a backup of your web site.
  - You can use whatever tools you like to create your data
    without involving your ISP.

Personally, I think HTML is a crappy language to write text
in. I prefer to use something like reST, see 
http://docutils.sourceforge.net/rst.html

 From reST there are convenient tools to get both HTML and
PDF documents--good for CVs etc. The standard tool doesn't
make room for those custom headers or footers though. There
is some help there though. Look here:
http://docutils.sourceforge.net/docs/user/links.html


From juho.schultz at helsinki.fi  Wed Feb 15 05:03:48 2006
From: juho.schultz at helsinki.fi (Juho Schultz)
Date: Wed, 15 Feb 2006 12:03:48 +0200
Subject: a numarray question
In-Reply-To: <1139995325.462403.126420@z14g2000cwz.googlegroups.com>
References: <1139995325.462403.126420@z14g2000cwz.googlegroups.com>
Message-ID: <dsuua4$2l4$1@oravannahka.helsinki.fi>

avharut at gmail.com wrote:
> hello everyone
> 
> would anyone please tell me what is the best (fastest) way of replacing
> values in numarray arrays?
> 
> lets say i have an array that may contain 0s, and i just want to get
> rid of those 0s by replacing them with another number. what would be
> the most efficient way to do that?
> 
> many thanks in advance!
> 
One way to do that is

data2 = numarray.choose(numarray.equal(data,0), (data, another_number))

I am not sure this is the most efficient way. If you get other 
suggestions, you can compare them with the timeit module.

http://www.python.org/doc/2.4.2/lib/module-timeit.html

But if you plan to do calculations with the data, I think replacing 
zeros is not critical for performance.


From nszabolcs at gmail.com  Tue Feb 21 14:48:40 2006
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 21 Feb 2006 11:48:40 -0800
Subject: editor for Python on Linux
In-Reply-To: <mailman.2220.1140518629.27775.python-list@python.org>
References: <dtai6e$23m$2@ariane.blic.net>
	<chlhv15ktc4u3adv34sgk63tok5vl9j50q@4ax.com>
	<43F8DA72.8040808@sympatico.ca>
	<43fa2376$0$1149$7a628cd7@news.club-internet.fr>
	<mailman.2220.1140518629.27775.python-list@python.org>
Message-ID: <1140551320.446264.24930@o13g2000cwo.googlegroups.com>

pida is a great ide as well:
http://pida.vm.bytemark.co.uk/projects/pida



From tjreedy at udel.edu  Wed Feb  8 14:23:17 2006
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 8 Feb 2006 14:23:17 -0500
Subject: Question about idioms for clearing a list
References: <mailman.1294.1138727665.27775.python-list@python.org>	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>	<mailman.1489.1139232969.27775.python-list@python.org>	<ds83kd$98m$1@sea.gmane.org><43E7F59B.9070009@REMOVEMEcyber.com.au>	<mailman.1537.1139297533.27775.python-list@python.org>	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>	<mailman.1546.1139320907.27775.python-list@python.org>	<dscdtr$ciu$1@wake.carmen.se><mailman.1594.1139403378.27775.python-list@python.org>
	<dsd311$qlp$1@wake.carmen.se>
Message-ID: <dsdgf3$7cn$1@sea.gmane.org>


"Magnus Lycka" <lycka at carmen.se> wrote in message 
news:dsd311$qlp$1 at wake.carmen.se...
> Statements and operators are really fundamental in Python. We
> don't support n = 1.add(2), since we have the '+' operator.

Actually, since the 2.2 union of type and new-style classes, which gave 
attributes to all types ....

>>> 1 .__add__(2)  # note space after 1
3
>>> 1.__add__(2)  # ambiguous, interpreter won't guess
SyntaxError: invalid syntax
>>> 1..__add__(2.)
3.0

I only see this as useful for making bound methods:

>>> inc = 1 .__add__
>>> inc(2)
3
>>> dub = 2 .__mul__
>>> dub(2)
4

which is certainly nicer than the older method of writing a 'makeoper' 
function that returned a nested function with either a default param or a 
closure.

Terry Jan Reedy





From johnmc at velseis.com.au  Thu Feb  9 18:38:53 2006
From: johnmc at velseis.com.au (John McMonagle)
Date: Fri, 10 Feb 2006 09:38:53 +1000
Subject: Determining an operating system's default browser
Message-ID: <1139528334.18246.24.camel@cornell>

Is there a python module which can determine an operating system's
default web browser application.

I would like to use it in the following context:  I have a GUI
application where all the documentation is written as html pages.  I
wish to have these html help pages open in the default browser when
selected from the application's Help menu

If python can determine the path to the default browser, I can then just
spawn it.

Regards,

John McMonagle




-- 
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.



From mac at calmar.ws  Tue Feb 21 05:36:03 2006
From: mac at calmar.ws (calmar)
Date: Tue, 21 Feb 2006 11:36:03 +0100
Subject: general coding issues - coding style...
References: <slrndve8oe.5jb.mac@news.calmar.ws>
	<1140305345.408445.49100@g43g2000cwa.googlegroups.com>
	<slrndvgosa.t5c.mac@news.calmar.ws>
	<1140467611.258139.254490@g43g2000cwa.googlegroups.com>
Message-ID: <slrndvlr8j.fa2.mac@news.calmar.ws>

On 2006-02-20, JW <John-Whitlock at ieee.org> wrote:

Hi JW,

> About this line:
> 1585 if sys.path[0][-12:] == "\library.zip":  #for py2exe
>
> pl... suggested:
> if sys.path[0].endswith( "\\library.zip" ):
>
>
> print "\\library.zip"
>

Yeah, I have two backslashes, but thaks for pointing out.

> If you don't use the double backslash, you'll eventually have a
> problem, especially in Windows, which unfortunately uses the backslash
> as a directory seperator.  You might also want to look at os.sep and
> the os.path.* functions, if you are interested in making your code work
> on different platforms.  

Yeah, I will use the os.sep variable, that's a good idea

thanks a lot,
calmar


-- 
  calmar

          (o_  It rocks: LINUX + Command-Line-Interface
          //\
          V_/_                     http://www.calmar.ws


From frank at chagford.com  Sat Feb 11 06:52:21 2006
From: frank at chagford.com (Frank Millman)
Date: 11 Feb 2006 03:52:21 -0800
Subject: Inserting record with Microsoft Access
In-Reply-To: <mailman.1655.1139487688.27775.python-list@python.org>
References: <dse868+n819@eGroups.com><43EB0355.9000603@compuscan.co.za>
	<mailman.1655.1139487688.27775.python-list@python.org>
Message-ID: <1139658741.918706.60230@g44g2000cwa.googlegroups.com>


Steve Holden wrote:
> Albert Leibbrandt wrote:
> >
> > jeffhg582003 wrote:
> >
> >
> >>Hi,
> >>
> >>I am developing a python script which add records to
> >>a microsoft access tables. All my tables have autogenerated number
> >>fields. I am trying to capture the number generated from the insert but
> >>I am not exactly sure how to do that after an insert.
> >>
> > I had to do something similiar in sql server and the experts back then
> > told me that the only way is to write a stored procedure. aparently sql
> > server does not have sequences and I am guessing that access is the same.
> >
> Well the experts were wrong, I suspect. Try
>
>    SELECT @@IDENTITY
>
> to return the autonumber key created by the most recent INSERT.
>
> I believe this works for both SQL Server and Access (doesn't anyone use
> Google any more?).
>
> regards
>   Steve
>

I use SELECT IDENT_CURRENT('tablename').

SELECT @@IDENTITY returns the most recent of all inserts. If you have a
complex transaction which triggers inserts into other tables, it may
not return the one you want.

This one allows you to specify the tablename, and it will return the
most recent key inserted into that table.

I got this from the built-in help for SQLServer. I cannot say whether
it works for Access as well.

Frank



From johnzenger at gmail.com  Tue Feb 28 11:21:12 2006
From: johnzenger at gmail.com (johnzenger at gmail.com)
Date: 28 Feb 2006 08:21:12 -0800
Subject: Vectorization and Numeric (Newbie)
References: <Pine.LNX.4.63.0602281346010.18656@pantelleria.ifi.uio.no>
Message-ID: <1141143672.536103.21910@i40g2000cwc.googlegroups.com>

"map" takes a function and a list, applies the function to each item in
a list, and returns the result list.  For example:

>>> def f(x): return x + 4

>>> numbers = [4, 8, 15, 16, 23, 42]
>>> map(f, numbers)
[8, 12, 19, 20, 27, 46]

So, rather that ask if there is a different way to write f, I'd just
use f in a different way.

Another way to accomplish the same result is with a list comprehension:

>>> [f(x) for x in numbers]
[8, 12, 19, 20, 27, 46]

As you can see, if you wanted to "calculate all the values from 1 to
n," you could also use these techniques instead of a loop.

>>> n = 10
>>> [f(x) for x in xrange(1, n+1)]
[5, 6, 7, 8, 9, 10, 11, 12, 13, 14]



From modelnine at bit-bukket.org  Sun Feb 26 15:10:22 2006
From: modelnine at bit-bukket.org (Heiko Wundram)
Date: Sun, 26 Feb 2006 21:10:22 +0100
Subject: Do I need to convert string to integer in python?
References: <1140983754.000103.104710@i40g2000cwc.googlegroups.com>
Message-ID: <dtt1pe$t0f$1@online.de>

Allerdyce.John at gmail.com wrote:
> Do I need to convert string to integer in python? or it will do it for
> me (since dynamic type)?

Yes. Dynamic typing doesn't say anything about a string and a number being
"equal," as they are (e.g.) in Perl, it just says that you don't have to
care what type of object a name is bound to. What you are thinking of is
called weak typing (auto-coercion between strings and numbers and such).

You'd have to do something like:
x = int(x)/10

--- Heiko.


From ian at excess.org  Wed Feb  8 12:10:16 2006
From: ian at excess.org (Ian Ward)
Date: Wed, 08 Feb 2006 12:10:16 -0500
Subject: Replacing curses
In-Reply-To: <11ujl3ibdh7vne1@corp.supernews.com>
References: <mailman.1566.1139345769.27775.python-list@python.org>
	<43E9234B.6030108@v.loewis.de>
	<mailman.1588.1139372460.27775.python-list@python.org>
	<11ujl3ibdh7vne1@corp.supernews.com>
Message-ID: <43EA25F8.70809@excess.org>

Thomas Dickey wrote:
> hmm - I've read Urwid, and most of the comments I've read in that regard
> reflect problems in Urwid.  Perhaps it's time for you to do a little analysis.
> 
> (looking forward to bug reports, rather than line noise)

A fair request.  My appologies for the inflammatory subject :-)

When trying to check for user input without waiting I use code like:
window_object.nodelay(1)
curses.cbreak()
input = window_object.getch()

Occasionally (hard to reproduce reliably) the cbreak() call will raise
an exception, but if I call it a second time before calling getch the
code will work properly.  This problem might be related to a signal
interrupting the function call, I'm not sure.

Also, screen resizing only seems to be reported once by getch() even if
the user continues to resize the window.  I have worked around this by
calling curses.doupdate() between calls to getch(). Maybe this is by design?

Finally, the curses escape sequence detection could be broadened. The
top part of the curses_display module in Urwid defines many escape
sequences I've run into that curses doesn't detect.

Ian Ward




From tdwdotnet at gmail.com  Mon Feb 20 06:19:11 2006
From: tdwdotnet at gmail.com (Tim Williams (gmail))
Date: Mon, 20 Feb 2006 11:19:11 +0000
Subject: multiple email recipients
In-Reply-To: <G34531597.942.12.1@mx-extra.net>
References: <1140425098.309890.116610@o13g2000cwo.googlegroups.com>
	<G34531597.942.12.1@mx-extra.net>
Message-ID: <9afea2ac0602200319o6a6dd802o@mail.gmail.com>

On 20/02/06, Rene Pijlman <reply.in.the.newsgroup at my.address.is.invalid>
wrote:
>
> eight02645999 at yahoo.com:
> >was wondering how to modify the code so as i can send to multiple email
> >recipients using "TO"? thanks.
>
> You add RFC 2822 headers.
> http://www.ietf.org/rfc/rfc2822.txt
> ("3.6.3. Destination address fields")


RFC 2822 relates to the format of the message,  not the sending of it.
Adding headers such as "Destination address fields"  will not affect nor
necessarilly be related in any way to the actual recipients of the message

The correct RFC might be RFC 2821 , Simple Mail Transfer Protocol.    But
the OP doesn't need RFC help,  just help with the smtplib module itself.  :)
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From jcoleman at franciscan.edu  Sat Feb 25 09:57:49 2006
From: jcoleman at franciscan.edu (John Coleman)
Date: 25 Feb 2006 06:57:49 -0800
Subject: Is Python a Zen language?
In-Reply-To: <1140878147.541074.233540@i40g2000cwc.googlegroups.com>
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
	<1140878147.541074.233540@i40g2000cwc.googlegroups.com>
Message-ID: <1140879469.853398.322850@i40g2000cwc.googlegroups.com>


Ron Stephens wrote:
> Actually, Python has the distinction of being both a great tool
> language *and* a great Zen language. That's what makes Python so cool
> ;-)))
>
> Ron Stephens
> Python411
> www.awaretek.com/python/index.html

This would explain why the question is so hard to answer. It is a
slam-dunk that Lisp is Zen and VBA is tool - but python really is a bit
hard to classify. This is somewhat similar to the way that python seems
to straddle the gap between imperative and functional languages. It has
something from each worlds (whether it has the *best* from each world
is a separate question)

-John Coleman



From python at hope.cz  Fri Feb 24 05:33:39 2006
From: python at hope.cz (Lad)
Date: 24 Feb 2006 02:33:39 -0800
Subject: How to send an email with non-ascii characters in Python
In-Reply-To: <slrndvtn7p.e6o.sybrenUSE@schuimige.unrealtower.org>
References: <1140775736.341876.314070@t39g2000cwt.googlegroups.com>
	<slrndvtn7p.e6o.sybrenUSE@schuimige.unrealtower.org>
Message-ID: <1140777219.636561.47960@e56g2000cwe.googlegroups.com>

Sybren,
and can give me an example of  Python code that can send such email??



From ehartfield at bungeecraft.com  Wed Feb  8 11:48:10 2006
From: ehartfield at bungeecraft.com (Edward Hartfield)
Date: Wed, 08 Feb 2006 10:48:10 -0600
Subject: Number Format function
Message-ID: <43EA20CA.7010809@bungeecraft.com>

I'm am relatively new to Python but use it daily.  Today, I went looking 
for a function, like PHP's number_function, that will take a number and 
return a string with number formatted with grouped thousands and the 
decimal portion rounded to a given number of places.  This is certainly 
needed when you want to take a floating-point value from a database and 
display it as currency, for instance.  I could not find what I was 
looking for so I wrote the following function.  I hope either (a) I've 
provided something useful or (b) someone can tell me what I *should* 
have done!  Thanks.

import math

def number_format(num, places=0):
    """Format a number with grouped thousands and given decimal places"""

    #is_negative = (num < 0)
    #if is_negative:
    #    num = -num

    places = max(0,places)
    tmp = "%.*f" % (places, num)
    point = tmp.find(".")
    integer = (point == -1) and tmp or tmp[:point]
    decimal = (point != -1) and tmp[point:] or ""

    count = commas = 0
    formatted = []
    for i in range(len(integer) - 1, 0, -1):
        count += 1
        formatted.append(integer[i])
        if count % 3 == 0:
            formatted.append(",")

    integer = "".join(formatted[::-1])
    return integer+decimal
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From eoinrogers at gmail.com  Mon Feb 13 13:46:16 2006
From: eoinrogers at gmail.com (Byte)
Date: 13 Feb 2006 10:46:16 -0800
Subject: Location of Python modules
In-Reply-To: <43F0D1A7.8000501@v.loewis.de>
References: <1139854184.504114.46690@z14g2000cwz.googlegroups.com>
	<1139854642.175799.165950@g43g2000cwa.googlegroups.com>
	<1139854910.669876.84730@o13g2000cwo.googlegroups.com>
	<43F0D1A7.8000501@v.loewis.de>
Message-ID: <1139856376.208422.182090@f14g2000cwb.googlegroups.com>

Found it in /usr/local/lib/python2.4/site-packages, thanks. Now, how do
i convert a .py program into a module?

 -- /usr/bin/byte



From hancock at anansispaceworks.com  Fri Feb 17 00:53:51 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Thu, 16 Feb 2006 23:53:51 -0600
Subject: PyProtocols, Components, and Inheritance
Message-ID: <20060216235351.168b2e9f@samwise.anansi>

I've been discussing PyProtocols with a a friend
collaborating with me on a SF game project, about
the benefits and design concept of "component architecture",
and I'm a little confused by what I'm learning.

I learned the concepts of "component architecture" from
the Zope project, where if I'm not mistaken, "components"
are essentially python "mix-in" classes, and you make
a class from components by using multiple inheritance
and document this with an interface declaration:

So in this model, I have (let's say):

Interfaces: IVehicle, IAnimal
	these are special (non-class) objects,
	even though their declarations look like class
	declarations

Components: Vehicle, Animal (each provide these interfaces)
	these are just ordinary python classes

Then I can make a class by combining components:

class Horse(Animal, Vehicle):
	implements(IAnimal, IVehicle)
	pass

(This is an interactive fiction engine, so it would be
reasonable to think of a horse both as an animal and
as a means of transportation -- but it's just an example).

However, this is apparently not how PyProtocols works.

The PP way apparently looks something like this:

Components: are special (non-class?) objects (just like
interfaces?)

So I need something like:

class Vehicle(Component):
	#... implementation snipped
	pass

class Animal(Component):
	#... implementation snipped
	pass

then I use it by making a class:

class Horse(object):
	pass

and only then do I "attach" components:

Horse.addComponent(Vehicle)
Horse.addComponent(Animal)

To me, this looks like madness. Aren't we just reinventing
multiple inheritance with obtuse syntax?  Why is multiple
inheritance such a bad thing? (I can see that it can be
abused, but ISTM that real trouble comes not from broad,
shallow multiple inheritance as in the component model, but
from deep inheritance chains (as one is forced to do in
single-inheritance languages)).

Anyway, my question is WHY? I know PyProtocols is
fairly popular, so there must be some benefit to this, 
but I'd really like to hear what it's supposed to be.

My friend seems to think there is a great evil in
doing it with multiple inheritance, yet the PyProtocols
way seems to be kind of complex. I had erroneously
assumed that PyProtocols and Zope component models
were more-or-less equivalent, with PP being perhaps
a bit more complete (for example, PP's interface module is
apparently a superset of Zope's).

I realize that at some level we're just having a "cultural
conflict" since we learned different versions of this
concept, but I would like to make a real attempt to
understand where he's coming from.  (And yes, of course
I've asked him, but since he only knows the PP way of
doing this, I don't think he's able to tell me -- I guess
we need an interpreter. ;-) ).

I feel like there's something going on here that
I just don't "get".

Is there someone out there who can give me a PyProtocols
advocate's PoV on this? Can you tell me why PP's approach is
"better" than Zope's? (Or perhaps what you think it is
more appropriate for?).  Anyway, c.l.python seemed like the
(neutral) place to ask since this is comparing two major
python packages.

Cheers,
Terry



-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From kenneth.s.chan at gmail.com  Fri Feb 24 14:44:27 2006
From: kenneth.s.chan at gmail.com (Kenny)
Date: 24 Feb 2006 11:44:27 -0800
Subject: Python/Spyce outputting
Message-ID: <1140810266.920230.296790@i40g2000cwc.googlegroups.com>

I am accessing a database through python and displaying it through the
web using spyce. My goal is to get a table on my webpage that displays
the queries that I am doing but in a table format that looks good
rather than the raw text output. Is there a reference out there that
can help me do that?



From aahz at pythoncraft.com  Thu Feb  9 14:11:02 2006
From: aahz at pythoncraft.com (Aahz)
Date: 9 Feb 2006 11:11:02 -0800
Subject: New editions of several Python books.
References: <dsfplv$ptp$1@wake.carmen.se>
Message-ID: <dsg446$g6f$1@panix3.panix.com>

In article <dsfplv$ptp$1 at wake.carmen.se>,
Magnus Lycka  <lycka at carmen.se> wrote:
>
>There is also a "Python for Dummies" on its way at last. (I'm not
>sure Python *is* for dummies though. Despite being so easy to learn
>and use, it mainly seems to attract smart and experienced people, why
>else would Python programmers be among the best paid programmers?)

If you can have _Borland C++ for Dummies_, _Python for Dummies_ makes a
lot more sense.  :-/
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"19. A language that doesn't affect the way you think about programming,
is not worth knowing."  --Alan Perlis


From nnorwitz at gmail.com  Sun Feb  5 01:38:04 2006
From: nnorwitz at gmail.com (nnorwitz at gmail.com)
Date: 4 Feb 2006 22:38:04 -0800
Subject: Fatal Python error: Py_EndInterpreter: thread still has a frame
In-Reply-To: <43e1d9fd$0$1224$91cee783@newsreader01.highway.telekom.at>
References: <43e1d9fd$0$1224$91cee783@newsreader01.highway.telekom.at>
Message-ID: <1139121484.559871.208790@o13g2000cwo.googlegroups.com>

Thomas Korimort wrote:
> Hi!
>
> Does anyone know the precise circumstances when the error
>
> "Fatal Python error: Py_EndInterpreter: thread still has a frame"
>
> does occur. I checked the source code of pythonrun.c, which tells me
> that this error message is thrown in Py_EndInterpreter, when
> thread->frame is checked for being NULL. Does anyone know, when this
> pointer is not NULL at the time where Py_EndInterpreter() is called?

Please create a test case and file a bug report, here:
http://sourceforge.net/tracker/?group_id=5470&atid=105470

n



From harlinseritt at yahoo.com  Wed Feb 22 08:54:11 2006
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 22 Feb 2006 05:54:11 -0800
Subject: Python CGI not working in Firefox but does in IE
In-Reply-To: <dthpvc$i0i$1@blackmamba.itd.rl.ac.uk>
References: <1140615651.847586.258300@f14g2000cwb.googlegroups.com>
	<dthpvc$i0i$1@blackmamba.itd.rl.ac.uk>
Message-ID: <1140616451.723356.257730@z14g2000cwz.googlegroups.com>

Ack... I'm an idiot... Thanks Richard -- You're the Man!



From rtilley at vt.edu  Thu Feb 23 15:35:12 2006
From: rtilley at vt.edu (rtilley)
Date: Thu, 23 Feb 2006 15:35:12 -0500
Subject: spaces at ends of filenames or directory names on Win32
In-Reply-To: <43FE1B5E.8060009@websafe.com>
References: <dtkuav$keb$1@solaris.cc.vt.edu> <43FE1B5E.8060009@websafe.com>
Message-ID: <dtl6a1$h85$1@solaris.cc.vt.edu>

Larry Bates wrote:
> How about not naming files with leading and trailing spaces on
> the Mac?  Seems like a bad habit that needs breaking ;-).
> 
> -Larry Bates

Users will be users! Tell that to the guys and gals on Macs who like to 
make a folder sort based on the number of spaces they've placed in the 
front of the filenames :)


From sigzero at gmail.com  Sat Feb 11 11:19:03 2006
From: sigzero at gmail.com (Robert Hicks)
Date: 11 Feb 2006 08:19:03 -0800
Subject: Yet another GUI toolkit question...
In-Reply-To: <mailman.1743.1139664790.27775.python-list@python.org>
References: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
	<mailman.1743.1139664790.27775.python-list@python.org>
Message-ID: <1139674743.846644.281840@z14g2000cwz.googlegroups.com>

Wow you are so wrong about Tk on OSX. Soon this is just not going to be
the case at all for any of the system Tcl/Tk runs on. The Tcl folks
have come out with a package called "Tile" that is going to be rolled
in. It gives you native L&F on OSX, Windows, Linux.

Robert



From peter at engcorp.com  Thu Feb 23 13:58:33 2006
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 23 Feb 2006 13:58:33 -0500
Subject: Pyserial never read
In-Reply-To: <8frrv117h4ca9pfft1s2e4la64u241mrnb@4ax.com>
References: <1140105936.408387.88130@z14g2000cwz.googlegroups.com>	<1140219414.143448.234450@z14g2000cwz.googlegroups.com>	<1140302110.028540.176210@g43g2000cwa.googlegroups.com>	<slrndvm0sr.6k1.nick@irishsea.home.craig-wood.com>	<mailman.2241.1140536285.27775.python-list@python.org>	<slrndvn1ad.he1.nick@irishsea.home.craig-wood.com>	<1140599901.082142.262540@f14g2000cwb.googlegroups.com>	<lt5pv159gtijha966nk97k5hrqhkehkmis@4ax.com>	<1140700256.017002.177580@f14g2000cwb.googlegroups.com>
	<8frrv117h4ca9pfft1s2e4la64u241mrnb@4ax.com>
Message-ID: <dtl0kk$vdr$1@sea.gmane.org>

Dennis Lee Bieber wrote:
>>>>dt = "D0360000EC"
>>>>print repr("".join([chr(int(dt[2*x:2*x+2],16)) for x in range(len(dt)//2)]))
> 
> '\xd06\x00\x00\xec'

By the way, for future reference, this way beats the above hands down:

 >>> import binascii
 >>> binascii.unhexlify("D0360000EC")
'\xd06\x00\x00\xec'


-Peter



From userprogoogle-139 at yahoo.co.uk  Thu Feb  9 07:23:43 2006
From: userprogoogle-139 at yahoo.co.uk (rodmc)
Date: 9 Feb 2006 04:23:43 -0800
Subject: Curios issues with Editors
Message-ID: <1139487823.219867.71790@z14g2000cwz.googlegroups.com>

I recently wrote a program in IDLE and it runs perfectly. However when
the same application is executed within SPE I receive errors  saying
that certain socket items are not callable, in particular AF_INET.

I am new to Python, is there a reason why somethings will run in IDLE
and not SPE?

I could post the source code but it is changing quite a bit, so this is
more of a general question than one about a specific bug or issue.


Best,

Rod



From johnjsal at NOSPAMgmail.com  Sun Feb 12 22:51:55 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Sun, 12 Feb 2006 22:51:55 -0500
Subject: how do you pronounce 'tuple'?
Message-ID: <vuednQcT5sUEn23eRVn-iA@rcn.net>

Yes, silly question, but it keeps me up at night.  :)

I know it comes from the suffix -tuple, which makes me think it's 
pronounced as 'toople', but I've seen (at m-w.com) that the first 
pronunciation option is 'tuhple', so I wasn't sure. Maybe it's both, but 
which is most prevalent?

Thanks! Now time to go back to reading the chapter on tuples...


From a.schmolck at gmail.com  Mon Feb 20 10:12:48 2006
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: 20 Feb 2006 15:12:48 +0000
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<yfspsljp321.fsf@oc.ex.ac.uk>
	<mailman.2131.1140377578.27775.python-list@python.org>
	<yfsbqx3ov29.fsf@oc.ex.ac.uk>
	<mailman.2144.1140404154.27775.python-list@python.org>
Message-ID: <yfsu0aunjwv.fsf@oc.ex.ac.uk>

"Fredrik Lundh" <fredrik at pythonware.com> writes:

> Alexander Schmolck wrote:
> 
> > My point was that Guido probably (and fortunately!) was unaware of the extent
> > to which you can have both dynamism and speed

For the convenience of other readers, allow me to restore the snipped second
half of that sentence: "... and the extent to which very
dynamic languages are suitable for writing robust software."
 
> any my point was that chosing to ignore something doesn't mean
> that you're ignorant.

    Interviewer: "You said originally you thought 500 lines would be a big
       Python program." 
    Guido van Rossum: "That was just my lack of imagination."

    <http://www.artima.com/intv/pyscale3.html>


    Guido van Rossum: "Another thing, much farther in the future, is
      compilation to C or machine code. I used to think that this was impossible
      and (perhaps because of that) uninteresting, but recent experiments (like
      Armin Rigo's Psyco and Greg Ewing's Pyrex) suggest that this will
      eventually be possible. It should provide Python with an incredible
      performance boost and remove many of the reasons why many people are still
      reluctant to switch to Python."
  
    <http://www.onlamp.com/pub/a/python/2002/06/04/guido.html?page=1>
    
 
> (but since you keep repeating this nonsense, it's clear that you're
> pretty ignorant wrt. software design.  too much CS exposure?).
 
Indeed. Your amazing reading comprehesion and lucid argumentation would
obviously be lost on my posts.

'as


From public at alexisgallagher.com  Tue Feb 21 03:19:23 2006
From: public at alexisgallagher.com (Alexis Gallagher)
Date: Tue, 21 Feb 2006 08:19:23 +0000
Subject: fast text processing
Message-ID: <dteiec$o7m$1@news.ox.ac.uk>

(I tried to post this yesterday but I think my ISP ate it. Apologies if 
this is a double-post.)

Is it possible to do very fast string processing in python? My 
bioinformatics application needs to scan very large ASCII files (80GB+), 
compare adjacent lines, and conditionally do some further processing. I 
believe the disk i/o is the main bottleneck so for now that's what I'm 
optimizing. What I have now is roughly as follows (on python 2.3.5).

filehandle = open("data",'r',buffering=1000)

lastLine = filehandle.readline()

for currentLine in filehandle.readlines():

     lastTokens = lastLine.strip().split(delimiter)
     currentTokens = currentLine.strip().split(delimiter)

     lastGeno = extract(lastTokens[0])
     currentGeno = extract(currentTokens[0])

     # prepare for next iteration
     lastLine = currentLine

     if lastGeno == currentGeno:
        table.markEquivalent(int(lastTokens[1]),int(currentTokens[1]))

So on every iteration I'm processing mutable strings -- this seems 
wrong. What's the best way to speed this up? Can I switch to some fast 
byte-oriented immutable string library? Are there optimizing compilers? 
Are there better ways to prep the file handle?

Perhaps this is a job for C, but I am of that soft generation which 
fears memory management. I'd need to learn how to do buffered reading in 
C, how to wrap the C in python, and how to let the C call back into 
python to call markEquivalent(). It sounds painful. I _have_ done some 
benchmark comparisons of only the underlying line-based file reading 
against a Common Lisp version, but I doubt I'm using the optimal 
construct in either language so I hesitate to trust my results, and 
anyway the interlanguage bridge will be even more obscure in that case.

Much obliged for any help,
Alexis


From http  Mon Feb 20 19:40:27 2006
From: http (Paul Rubin)
Date: 20 Feb 2006 16:40:27 -0800
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<pan.2006.02.19.08.00.50.166399@REMOVETHIScyber.com.au>
Message-ID: <7xk6bp4k90.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVETHIScyber.com.au> writes:
> > > efficient? Is there some *specific* basic reason it's tough?  Or is it
> > > that this type of problem in general is tough, and Lisp has 40+ years
> > > vs Python's ~15 years?
> >
> > It is by design. 
> Python is not slow by design. Python is dynamically typed by design, and
> relative slowness is the trade-off that has to be made to give dynamic
> types.

I think both of you are missing the point of the question, which is
that Lisp is dynamically typed exactly the way Python is and maps to
Python almost directly; yet good Lisp implementations are much faster
than CPython.  

> The Python developers have also done marvels at speeding up Python since
> the early days, with the ultimate aim of the PyPy project to make Python
> as fast as C, if not faster. In the meantime, the question people should
> be asking isn't "Is Python fast?" but "Is Python fast enough?".

That is the real answer: CPython doesn't reach performance parity with
good Lisp implementations, but is still fast enough for lots of
purposes.  Psyco and PyPy are ongoing efforts to close the performance
gap and which are showing promise of success.


From Mandy.Owens at jnetdirect.com  Fri Feb 24 15:36:23 2006
From: Mandy.Owens at jnetdirect.com (Mandy Owens)
Date: Fri, 24 Feb 2006 15:36:23 -0500
Subject: Quality Labs release PDbSeed - Database-driven testing in Python
Message-ID: <3EBB05E118D9B341A58645FA02284BD72E6C32@jnd-master.jnetdirect.com>

 
Exciting new announcement in the Python community!  Read more
information about PDbSeed and Quality Labs @
www.qualitylabs.org/pdbseed/

Quality Labs <http://www.qualitylabs.org> , an open-source repository
that hosts projects which address software quality, just released
PDbSeed <http://www.qualitylabs.org/pdbseed> , a database seeding and
verification tool written in Python.  PDbSeed performs an operation,
such as DELETE or INSERT, on a database using an XML dataset file for
input/output.

PDbSeed is useful in unit tests that interact with a database.
Typically, one would use PDbSeed in the unit tests setup and teardown to
ensure that the database's state is consistent across execution of
tests.

PDbSeed <http://www.qualitylabs.org/pdbseed/> :

is an open-source LGPL-licensed project
is written in Python
has been tested with Python version 2.3 and 2.4
supports MySQL
borrows many ideas from DbUnit <http://www.dbunit.org/> , and makes them
available for Python
Download version 0.7 here <http://www.qualitylabs.org/frs/?group_id=11>
. 

 

Please let me know if you have any additional questions regarding this
annoucement.

Kind Regards,

Mandy Owens
Marketing Manager
JNetDirect
(703) 880-3842
www.jnetdirect.com <http://www.jnetdirect.com/> 
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From igouy at yahoo.com  Wed Feb 22 14:57:25 2006
From: igouy at yahoo.com (Isaac Gouy)
Date: 22 Feb 2006 11:57:25 -0800
Subject: Is python very slow compared to C
In-Reply-To: <pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
References: <1139690972.344818.136870@f14g2000cwb.googlegroups.com>
	<1139694723.857673.263750@z14g2000cwz.googlegroups.com>
	<pan.2006.02.12.01.06.28.628248@REMOVETHIScyber.com.au>
	<1139742200.155197.245490@g14g2000cwa.googlegroups.com>
	<pan.2006.02.12.14.03.38.370043@REMOVETHIScyber.com.au>
Message-ID: <1140638245.919385.84510@g47g2000cwa.googlegroups.com>

Steven D'Aprano wrote:
> On Sun, 12 Feb 2006 03:03:20 -0800, bearophileHUGS wrote:
>
> > Steven D'Aprano>Very slow to do what, compared to what? The decay time
> > of the tau meson?<
> >
> > Probably every answer I can give you is wrong for you, so answering is
> > almost useless...
>
> We do actually agree. You did explain why the speed of the language itself
> is rarely the critical factor. My criticism is that whatever good your
> post would have done was nullified by your opening comment stating that
> Python is very slow -- a comment which I think is not only harmful, but
> wrong, benchmarks like the one you linked to not withstanding.
>
> I think it is wrong to call Python "very slow" just because it is slower
> than some other language or languages, for the same reason it would be
> wrong to describe the population of the UK as "very low" because 60
> million people is a smaller number than China or India's one billion plus.
> Doing so merely reinforces the premature optimizer's message that any
> language that isn't C (and sometimes Lisp) is "not fast enough".

There was some context: Is python very slow compared to C?

With similar context your example becomes: Is the population of the UK
very low compared to the population of China or India? (Which seems to
be a reasonable question.)

We can make the missing context in the OP's question more obvious like
this: Is the population of the UK very /slow/ compared to the
population of China or India?


>  The benchmark you pointed to are of limited use for application
>  developers. (Their value to language designers is another story.)

Limited use for what purpose?
(Yes it really is difficult to make all our assumptions explicit in our
writing.)

> Given
> that Ocaml is (say) 200 times faster than Python on average, it tells the
> application developer virtually nothing about the performance of his
> application. And that's what user's care about -- they couldn't care less
> about binary trees or partial sums, they care about how long it takes to
> render a JPEG, open an email, save their files, query the database,
> display a window, and so forth. Few application level tasks are limited by
> the speed of the language, not these days.

As in
http://shootout.alioth.debian.org/miscfile.php?file=benchmarking&title=Flawed%20Benchmarks

>
> You don't believe me? Consider the following:
>
> When you drag your mouse over text in a graphical text editor, the text
> highlights. How much money would you be prepared to pay to make that
> highlighting occur 200 times faster? $100? $1? One cent? Chances are you
> wouldn't pay a thing, because it is already fast enough, and making it
> faster is of zero value to you -- even if highlighting ten gigabytes of
> text might be uncomfortably slow.
>
> What about opening an email? How much would you pay to reduce the time it
> takes to open and display an email from a hundredth of a second to
> virtually instantaneously? I suggest that most people would consider 0.01s
> to already be be "virtually instantaneously".
>
> The important question isn't "is Python fast or slow?", it is "is Python
> fast enough?". That's a question that doesn't have a simple answer,
> because it depends. Fast enough to do what?
>
> But, in general, more often than not, Python is fast enough. The extra
> value of using something like Lua or Ocaml or even C is just not enough to
> make up for the disadvantages of using those languages.

Seems like you're having your cake and eating it too - if it's
meaningless for others to talk in generalities about fast or slow, and
it's just as meaningless to talk in generalities about 'more often than
not'.

>
> Of course Python isn't always fast enough. Please don't waste your time
> coming up with practical examples where pure Python is objectively too
> slow for a certain task, because you won't be telling me anything I don't
> already know.
>
> But the developer doesn't have to write pure Python, he can call a module
> written in C, or change the algorithm, or find another way to accomplish
> the same end result. Or even decide that for this specific task, Python is
> not the language to use. These are all good solutions, but they don't mean
> that Python is "very slow" in general. Even C is not always fast enough,
> but we wouldn't say C is "very slow" just because it can't calculate the
> first million Mersenne Primes in twenty milliseconds.
> 
> 
> -- 
> Steven.



From "jay\" at (none)  Sat Feb 25 11:39:50 2006
From: "jay\" at (none) (none)
Date: Sat, 25 Feb 2006 09:39:50 -0700
Subject: Problem with Property
In-Reply-To: <mailman.2429.1140876889.27775.python-list@python.org>
References: <TsydnRFxOJsBw53ZnZ2dnUVZ_tqdnZ2d@comcast.com>
	<mailman.2429.1140876889.27775.python-list@python.org>
Message-ID: <L-Gdnbldueyw8Z3ZRVn-pQ@comcast.com>

Steve Holden wrote:
> "none <"@bag.python.org wrote:

> It seems particularly odd to want to put getters and setters behind 
> property access. What does the extra layer buy you?

The purpose is that there is more to the accessors then I posted.

The setters do some 'mark dirty' bookeeping whenever the object state 
changes. (I had coded something similar in a prior project but had 
forgotten a bit of my own work...in that project the setters also did 
some event signaling as the objects were part of an Observer-Observable 
pattern)

The getters also have some code in them for dealing with default values 
if the given variable behind the property does not exist (which happened 
when I was pickling objects and the class structure changed over time; 
it was helpful to be able to have the getter be able to check if the 
variable existed and, if not, provide a default value...a way of 
migrating objects to new class definitions)

So, the use of properties allowed me let clients of the class to use 
direct access syntax...  o.value versues o.value() or o.value = 123 
versus o.value(123) ...but still allow me to do the bookkeeping needed 
for my object state.  The use of the _getProperty() and _setProperty() 
and using lambdas in the actual property definition allowed me to have a 
default setter/getter of sorts so I didn't need to write a seperate 
getter and setter method for each variable

Take care,
Jay


From steve at REMOVEMEcyber.com.au  Mon Feb 27 02:34:23 2006
From: steve at REMOVEMEcyber.com.au (Steven D'Aprano)
Date: Mon, 27 Feb 2006 18:34:23 +1100
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<7xmzgdtjl0.fsf@ruckus.brouhaha.com>
Message-ID: <4402AB7F.7070804@REMOVEMEcyber.com.au>

Paul Rubin wrote:

> Ben Finney <bignose+python at benfinney.id.au> writes:
> 
>>Enumerations with no values are meaningless.  The exception
>>``EnumEmptyError`` is raised if the constructor is called with no
>>value arguments.
> 
> 
> Why are empty enumerations not allowed?  Empty sets, empty lists,
> empty dictionaries are all allowed.  I don't see any obvious benefits
> to not allowing empty enumerations.

What is an empty enum? How and when would you use it?

The best I can come up with is that an empty enum would 
be the enumerated values you have when you don't 
actually have any enumerated values. This is not to be 
confused with an empty list: an empty list is a 
well-defined concept. It is just a list (a container) 
with nothing in it. A list of X is like a box 
containing X, and like boxes, an empty list (or set, or 
dict) is meaningful. An enum of X is just the Xs 
themselves. If there is no X, there is nothing there.

But if you have a good usage case for an empty enum, 
please feel free to tell us.


-- 
Steven.



From rtilley at vt.edu  Mon Feb 27 19:01:29 2006
From: rtilley at vt.edu (rtilley)
Date: Mon, 27 Feb 2006 19:01:29 -0500
Subject: spaces at ends of filenames or directory names on Win32
In-Reply-To: <4AKMf.283745$6p3.8940775@phobos.telenet-ops.be>
References: <dtkuav$keb$1@solaris.cc.vt.edu> <dtvoap$44m$1@solaris.cc.vt.edu>
	<4AKMf.283745$6p3.8940775@phobos.telenet-ops.be>
Message-ID: <du03p9$qnc$1@solaris.cc.vt.edu>

Roel Schroeven wrote:
> rtilley schreef:
> 
>> This will at least allow me to ID folders that start with 
>> whitespace... from within Windows too :) yet I still cannot rename the 
>> folders after stripping the whitespace... attempting to gives an 
>> [Errno 2] No such file or directory. The strip seems to work right too 
>> according to the prints before and after.
> 
> 
> Does the rename work if try with other names? 

Yes, the script can rename files that have no end whitespace. Also, I 
should note the the Windows GUI cannot rename the files. Same error... 
cannot stat the file. The only way I've been able to rename is through 
the cmd prompt using quotes like this:

ren " bad file with end spaces " good_file_no_end_spaces

I should also note that the code I posted earlier is misleading as 
os.listdir() gets dirs and files... not just dirs as I implied. Here's a 
better example that should get whitespace at either end (and does indeed 
on Mac and Unix... but not Windows)

--------------------------------------------------------

import os
import os.path
import string

# dirs is actually files and folders, not just folders.
dirs =  os.listdir(os.getcwd())
path = os.getcwd()
print path

for d in dirs:

     # If folder name begins with whitespace.
     if d[0] in string.whitespace:
         print d
         try:
             new_path = os.path.join(path, d.strip())
             old_path = os.path.join(path, d)
             print new_path
             print old_path
             os.renames(old_path, new_path)
         except Exception, e:
             print e

     # If folder name ends with whitespace.
     elif d[-1] in string.whitespace:
         print d
         try:
             new_path = os.path.join(path, d.strip())
             old_path = os.path.join(path, d)
             print new_path
             print old_path
             os.renames(old_path, new_path)
         except Exception, e:
             print e

     # Folder name is OK, so skip it.
     else:
         pass


From crutcher at gmail.com  Sun Feb 26 00:29:26 2006
From: crutcher at gmail.com (Crutcher)
Date: 25 Feb 2006 21:29:26 -0800
Subject: Is Python a Zen language?
In-Reply-To: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
References: <1140876556.080086.252390@e56g2000cwe.googlegroups.com>
Message-ID: <1140931766.200951.321320@t39g2000cwt.googlegroups.com>

You are a very silly person. You have tripped so many of my internet
bullshit triggers that I think perhaps you are trolling. All languages
alter the way you think. They structure the nature of questions you can
ask, and problems you can solve.

Do you understand 'Zen', by which I mean, have you devoted at least 5
years of study (real, 5+ hrs/week studdy) to it? (btw, I have not). If
your answer is no, then you are just using this to be cool.

And if you can say 'no value judgment is intended by my
classification', you have absolutely no right to talk about the nature
of language, let alone go about labeling things 'Zen languages'.
Honestly, classification is an act of valuation, it requires an
introspective assesment of your personal language system. This stuff is
_old_, not new, not novell.

Go read a book.
Like this one: http://www.aber.ac.uk/media/Documents/S4B/the_book.html



From diesch at spamfence.net  Thu Feb  9 01:44:38 2006
From: diesch at spamfence.net (Florian Diesch)
Date: Thu, 9 Feb 2006 07:44:38 +0100
Subject: Too Many if Statements?
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<dsaqkj$jhm$1@xenon.Stanford.EDU>
	<GU8Gf.22899$Jd.6095@newssvr25.news.prodigy.net>
	<dsb95i$pld$1@xenon.Stanford.EDU>
Message-ID: <20060209064438.4F45.1.NOFFLE@dieschf.news.arcor.de>

Alan Morgan <amorgan at xenon.Stanford.EDU> wrote:
> In article <GU8Gf.22899$Jd.6095 at newssvr25.news.prodigy.net>,
> Bryan Olson  <fakeaddress at nowhere.org> wrote:
>>Alan Morgan wrote:
>>> slogging_away wrote:
>>> 
>>>>Hi - I'm running Python 2.4.2 (#67, Sep 28 2005, 12:41:11) [MSC v.1310
>>>>32 bit (Intel)] on win32, and have a script that makes numerous checks
>>>>on text files, (configuration files), so discrepancies can be reported.
>>>>The script works fine but it appears that I may have hit a wall with
>>>>'if' statements.
>>>>
>>> I generated files with 10000, 25000, and 50000 simple if statements and ran
>>> them.  10000 was okay, 25000 gave a bizarre internal error, and 50000 segfaulted
>>> and died.  My system has plenty of memory and it isn't obvious to me why python
>>> should be so bothered about this.  I'm not sure why I can have 10x the number of
>>> if statements that cause you trouble.  There might be some overall limitation
>>> on the number of statements in a file.
>>
>>I made a script with 100,000 if's, (code below) and it appears
>>to work on a couple systems, including Python 2.4.2 on Win32-XP.
>>So at first cut, it doesn't seem to be just the if-count that
>>triggers the bug.
>
> Mine was a simple
>
> #!/usr/local/bin/python
>
> zot=24999
> if zot == 0:
>   print "It's 0"
>
> if zot == 1:
>   print "It's 1"
>
> ....
>
> if zot == 24999:
>   print "It's 24999"
>
> generated (I'm ashamed to admit) by a perl script.  Is there any good
> reason why it is failing?  I'd prefer a "Too many silly walks in your
> program.  Reduce!" to a crash.  I could experiment with putting the
> matching 'if' at the beginning rather than at the end, but I'm not
> sure what that would tell me.


Here[1] it works with 400000 (with 500000 it starts swapping too much) 
"if"-statements generated by

==========================================
#!/usr/bin/env python

print """#!/usr/bin/env python

zot=24999
"""

for i in range(0, 400000):
 print """
if zot == %d:
   print "It's %d"
 """%(i,i)
     
============================================


[1] Python 2.4.2 (#2, Sep 30 2005, 21:19:01) 
[GCC 4.0.2 20050808 (prerelease) (Ubuntu 4.0.1-4ubuntu8)]



   Florian
-- 
No no no! In maths things are usually named after Euler, or the first
person to discover them after Euler.
[Steven D'Aprano in <pan.2005.11.22.10.29.25.388240 at REMOVETHIScyber.com.au>]


From john_zenger at yahoo.com  Mon Feb 20 10:09:55 2006
From: john_zenger at yahoo.com (John Zenger)
Date: Mon, 20 Feb 2006 10:09:55 -0500
Subject: number ranges (was Re: Matlab page on scipy wiki)
In-Reply-To: <43F97AA8.50005@REMOVEMEcyber.com.au>
References: <e86a5fd00602131854s73191cbbu742d4434ad074908@mail.gmail.com>
	<1139945386.3346.38.camel@pc1.cole.uklinux.net>
	<43F8D881.5030804@sympatico.ca>
	<gfmdnZrrLeHK22TenZ2dnUVZ_tCdnZ2d@comcast.com>
	<43F97AA8.50005@REMOVEMEcyber.com.au>
Message-ID: <3_WdnUP9qr9XRmTenZ2dnUVZ_sydnZ2d@comcast.com>

Steven D'Aprano wrote:
> John Zenger wrote:
> 
>> I strongly agree that Python should promote range or xrange to syntax. 
>> I favor [0..10] rather than [0:10] because 0..10 is inherently easier 
>> to understand.
 >
> "Inherently"?
> 
> You mean people are born with an instinctive, unlearnt understanding of 
> ..? 

I mean that most people will have seen that notation somewhere else in 
their pre-Python lives, so it won't take much effort for them to 
remember what it is, at least more so than 0:10.

> With the 
> introduction of a single keyword, we could do this:
> 
> for i in 2 to 5:
>     print i,
> 
> which would print 2 3 4 5

This proposed syntax is also easy to understand, maybe more than "..", 
because it uses natural language.  The only criticism is that it creates 
a list without using [] notation.  How about [2 to 5]?

> 
> (I'm open to arguments that it should be more Pythonic and less 
> mathematical, and halt at 4.)

I am also open to such arguments but it will be tough to convince me 
that "x to y" should mean something different from what it means in 
Pascal, BASIC, and English.

> 
> A second keyword "downto" would allow easy backwards loops,

"Downto" would only be necessary if we wanted "[10 to 1]" to equal [].

> and a third 
> "step" will absolutely kill any chance of Guido agreeing to this 
> whatsoever.

What about [1 to 3 to 10]?  (Or [1 to 10:2]?)


From bmccann at andmore.com  Wed Feb  8 10:16:21 2006
From: bmccann at andmore.com (McCann, Brian)
Date: Wed, 8 Feb 2006 10:16:21 -0500
Subject: What editor shall I use?
Message-ID: <A272EB3E7DECD641A6A8854D61378725933487@diopside.andmore.com>

I use it on XP....visit http://www.vim.org/download.php , and scroll
down to the Windows section.

--Brian 

> -----Original Message-----
> From: python-list-bounces+bmccann=andmore.com at python.org 
> [mailto:python-list-bounces+bmccann=andmore.com at python.org] 
> On Behalf Of Lad
> Sent: Wednesday, February 08, 2006 10:08
> To: python-list at python.org
> Subject: Re: What editor shall I use?
> 
> is vim for XP?
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 
> 


From fredrik at pythonware.com  Tue Feb  7 17:21:58 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 7 Feb 2006 23:21:58 +0100
Subject: Question about idioms for clearing a list
References: <mailman.1294.1138727665.27775.python-list@python.org><1139231464.914400.37100@g44g2000cwa.googlegroups.com><mailman.1489.1139232969.27775.python-list@python.org><ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au><mailman.1537.1139297533.27775.python-list@python.org><1139300825.858426.12680@o13g2000cwo.googlegroups.com><1139306562.105655.23200@f14g2000cwb.googlegroups.com><mailman.1548.1139321341.27775.python-list@python.org><1139332464.076140.164220@g43g2000cwa.googlegroups.com>
	<34bb7f5b0602071406m228105b8y@mail.gmail.com>
Message-ID: <dsb6i8$7rt$1@sea.gmane.org>

Ed Singleton wrote

> I'm not mud-slinging, I'm just saying that people are very dismissive
> of making the language easier to use for newbies.

no, you're telling people who have long experience in explaining things
to "newbies" that their experiences don't count, and that you are the
only newbie that's important.

</F>





From see at signature.invalid  Sat Feb 18 19:08:39 2006
From: see at signature.invalid (Nigel Rowe)
Date: Sun, 19 Feb 2006 11:08:39 +1100
Subject: define loop statement?
References: <lW4Jf.31559$3V4.8390@trnddc06>
	<T4LJf.14256$915.10437@southeast.rr.com>
	<mailman.2111.1140303740.27775.python-list@python.org>
Message-ID: <ov2dnUblZLiWKmrenZ2dnUVZ_t2dnZ2d@giganews.com>

Felipe Almeida Lessa wrote:

> Em S?b, 2006-02-18 ?s 20:04 +0000, Jeffrey Schwab escreveu:
>> if __name__ == '__main__':
>>     loop = Loop(10)
>>     while loop:
>>         print "OK"
> 
> Maybe:
> 
> while Loop(10)():
>     print "OK"
> 
> Looks rather ugly but requires one less line ;-).
> 
Doesn't work.  You get a NEW Loop(10) instance on each pass through the
'while'.  This is just an expensive way to make an endless loop.

-- 
        Nigel Rowe
        A pox upon the spammers that make me write my address like..
                rho (snail) swiftdsl (stop) com (stop) au


From littlejohn.75 at news.free.fr  Sun Feb 19 15:49:23 2006
From: littlejohn.75 at news.free.fr (F. Petitjean)
Date: 19 Feb 2006 20:49:23 GMT
Subject: editor for Python on Linux
References: <dtai6e$23m$2@ariane.blic.net>
	<chlhv15ktc4u3adv34sgk63tok5vl9j50q@4ax.com>
Message-ID: <43f8d9d3$0$3308$636a55ce@news.free.fr>

Le Sun, 19 Feb 2006 21:33:59 +0100, Rene Pijlman a ?crit :
> Mladen Adamovic:
>>I wonder which editor or IDE you can recommend me for writing Python 
>>programs.
>
> vi

I beg to disagree :-) Use ed
"Ed is the standard text editor."
http://www.gnu.org/fun/jokes/ed.msg.html




From python at rcn.com  Fri Feb  3 00:34:10 2006
From: python at rcn.com (Raymond Hettinger)
Date: 2 Feb 2006 21:34:10 -0800
Subject: Calling a string as a function.
References: <mailman.1371.1138943429.27775.python-list@python.org>
Message-ID: <1138944850.136462.105990@o13g2000cwo.googlegroups.com>

brandon.mcginty at gmail.com wrote:
> I'm completely new to python, so sorry for my ignorence.
> How does one go about converting a string, for instants one received through
> tcp, into something that can be called as a function?
> I'm trying to have what the user sends to the computer through the network,
> run as a function.
> If the user sends "motd", the function motd will be run inside the script.

The unsafe way is to run the string through exec or eval():

  s = 'motd()'  # string received from user via the network
    . . .
  exec s

A safer way is to create a limited vocabulary of calls,
look them up in a dictionary and dispatch them to pre-built functions:


  vocab = {'motd': motd, 'quit':quit, 'save':save}
    . . .
  s = 'motd'  # string received from user via the network
    . . . 
  vocab[s]()  # lookup the string and run it if defined



From http  Thu Feb 16 00:48:32 2006
From: http (Paul Rubin)
Date: 15 Feb 2006 21:48:32 -0800
Subject: Safe Python Execution
References: <1140058830.477028.26620@f14g2000cwb.googlegroups.com>
Message-ID: <7xzmkrzwen.fsf@ruckus.brouhaha.com>

"Graham" <graham.abbott at gmail.com> writes:
> I've been messing around with trying to get a small sandbox like
> environment where i could execute python code in a "safe" way.
> Basically what the old restricted execution module attempted to do.

The old rexec module was removed for the precise reason that it wasn't
safe and there is no simple way to fix it.


From blair.houghton at gmail.com  Sun Feb  5 15:12:05 2006
From: blair.houghton at gmail.com (Blair P. Houghton)
Date: 5 Feb 2006 12:12:05 -0800
Subject: Learning Python
In-Reply-To: <ds58ca$aii$2@aphrodite.grec.isp.9tel.net>
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
	<ds58ca$aii$2@aphrodite.grec.isp.9tel.net>
Message-ID: <1139170325.207481.125600@o13g2000cwo.googlegroups.com>


Xavier Morel wrote:
> Where the hell did you get the idea of stacking input on a raw_input in
> the first place?

I'm guessing it goes something like:  "input is a verb, but raw_input
is a noun, so raw_input looks like a cast or conversion or stream
constructor, and input looks like an action..."

raw_input is a bad name for get_interactive_input, anyway...

--Blair



From rabkin at mweb[DOT]co[DOT]za  Tue Feb 21 14:05:53 2006
From: rabkin at mweb[DOT]co[DOT]za (Max)
Date: Tue, 21 Feb 2006 21:05:53 +0200
Subject: That's really high-level: bits of beautiful python
Message-ID: <ZpSdnRUPhtMP-WbenZ2dnUVZ_sSdnZ2d@is.co.za>

I have a friend who has been programming in C for many years, and he is 
a great fan of the language. However, he (and I) are about to start a 
python course, and he has been asking me a lot of questions. He often 
responds to my answers with "Urgh! Object-orientation!" and suchlike.

But today we were discussing the problem of running externally-provided 
code (e.g. add-on modules). Neither of us knew how to do it in C, though 
I suggested using DLLs. However, I quickly installed python on his 
laptop and coded this:

exec "import %s as ext_mod" % raw_input("Module: ")
ext_mod.do()

And created to sample modules with do() functions to demonstrate. He was 
impressed ("That's really high-level" were his words).

I was just thinking perhaps we should create some kind of collection of 
bits of "impressive" code like this.

He also liked 99 Bottles in one line:

print '\n'.join(["%d bottles of beer on the wall." % i for i in 
range(100,0,-1)])

--Max


From nszabolcs at gmail.com  Mon Feb 13 13:17:22 2006
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 13 Feb 2006 10:17:22 -0800
Subject: Location of Python modules
In-Reply-To: <1139854184.504114.46690@z14g2000cwz.googlegroups.com>
References: <1139854184.504114.46690@z14g2000cwz.googlegroups.com>
Message-ID: <1139854642.175799.165950@g43g2000cwa.googlegroups.com>

/usr/lib/python2.4/site-packages ?



From jason at tishler.net  Tue Feb 21 10:01:39 2006
From: jason at tishler.net (Jason Tishler)
Date: Tue, 21 Feb 2006 10:01:39 -0500
Subject: Building python 2.4.2 on Cygwin
In-Reply-To: <BAY103-DAV57F9CCBBF26B0B2302C2CDBFC0@phx.gbl>
References: <1140467074.739405.163440@g44g2000cwa.googlegroups.com>
	<20060220214414.GA1924@tishler.net>
	<BAY103-DAV260105A00AAD2FCF161F8DBFC0@phx.gbl>
	<20060221133709.GB2552@tishler.net>
	<BAY103-DAV57F9CCBBF26B0B2302C2CDBFC0@phx.gbl>
Message-ID: <20060221150139.GC2552@tishler.net>

Steve,

On Tue, Feb 21, 2006 at 09:31:48AM -0500, Stephen Gross wrote:
> >Just to be sure, what does the following indicate?
>     $ cygcheck -c cygwin
> Cygwin Package Information
> Package              Version        Status
> cygwin               1.5.18-1       OK

Try reinstalling Cygwin 1.5.18 or upgrading to 1.5.19.

Jason

-- 
PGP/GPG Key: http://www.tishler.net/jason/pubkey.asc or key servers
Fingerprint: 7A73 1405 7F2B E669 C19D  8784 1AFD E4CC ECF4 8EF6


From michele.petrazzo at TOGLIunipex.it  Fri Feb 24 13:36:15 2006
From: michele.petrazzo at TOGLIunipex.it (Michele Petrazzo)
Date: Fri, 24 Feb 2006 19:36:15 +0100
Subject: Exception not raised
In-Reply-To: <43ff3fc8$0$29105$5fc30a8@news.tiscali.it>
References: <43ff3fc8$0$29105$5fc30a8@news.tiscali.it>
Message-ID: <43ff521d$0$29107$5fc30a8@news.tiscali.it>

Michele Petrazzo wrote:
> Hi list, I have a strange error on my software on win 2k/xp and
> debian 3.1 with py 2.3.5 / 2.4.1 + twisted + wxpython:

Just for give evidence to my _failed_ tests, my a debugger (eric3), it
see the exception, so it break with a KeyError!
And the same code, no!

Thanks,
Michele


From steve at holdenweb.com  Thu Feb  2 03:38:29 2006
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 02 Feb 2006 08:38:29 +0000
Subject: How do I dynamically create functions without lambda?
In-Reply-To: <1ha3g79.1gcm6x1yziggyN%aleaxit@yahoo.com>
References: <1138389517.896043.7450@g47g2000cwa.googlegroups.com>	<pan.2006.01.28.00.35.06.174939@REMOVETHIScyber.com.au>	<1138436008.628882.126510@g44g2000cwa.googlegroups.com>	<pan.2006.01.28.12.02.34.293286@REMOVETHIScyber.com.au>	<drr978$oat$1@xenon.Stanford.EDU>
	<1ha3g79.1gcm6x1yziggyN%aleaxit@yahoo.com>
Message-ID: <drsge9$m6s$1@sea.gmane.org>

Alex Martelli wrote:
> Alan Morgan <amorgan at xenon.Stanford.EDU> wrote:
>    ...
> 
>>Excessive cleverness can lead to unmaintainable code.  So can excessive
>>stupidity.
> 
> 
> +1 QOTW.
> 
++

> 
>>Since there are a lot more stupid people than clever people out there I
>>think the more likely scenario is having to maintain unmaintainable code
>>written by a complete idiot whose programming knowledge comes solely from
>>books whose titles end with "In 7 Days".
> 
> 
> Disagree -- far more people THINK they're clever, than really ARE
> clever.  According to a recent article in the Financial Times, over 40%
> of a typical financial firm's employees firmly believe they are among
> the 5% best employees of the firm -- and the situation, believe me, is
> no different in programming.
> 
> 

Just as 85% of drivers believe their skill level is "above average".

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From eoinrogers at gmail.com  Sun Feb  5 12:13:59 2006
From: eoinrogers at gmail.com (Byte)
Date: 5 Feb 2006 09:13:59 -0800
Subject: Learning Python
In-Reply-To: <1haa3vv.14kwor18tfjwnN%aleaxit@yahoo.com>
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
	<ds588v$6s4$02$1@news.t-online.com>
	<1139156577.897100.69140@g43g2000cwa.googlegroups.com>
	<mailman.1439.1139157505.27775.python-list@python.org>
	<1139158796.288778.244000@z14g2000cwz.googlegroups.com>
	<1haa3vv.14kwor18tfjwnN%aleaxit@yahoo.com>
Message-ID: <1139159638.941399.198050@g47g2000cwa.googlegroups.com>

Thanks, never knew that, but they are using raw_input as a stack,
aren't they?



From aleaxit at yahoo.com  Tue Feb 21 00:47:54 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Mon, 20 Feb 2006 21:47:54 -0800
Subject: Augmented assignment
References: <dte88n$568$2@home.itg.ti.com>
Message-ID: <1hb2v4y.10mq2db1cii2tcN%aleaxit@yahoo.com>

Suresh Jeevanandam <jm.suresh at gmail.com> wrote:

> Hi,
>       Is there any gain in performance because of augmented assignments.
> 
>       x += 1  vs x = x+1
> 
> Or are both of them the same.

Just *MEASURE*, man!

helen:~/apy alex$ python -mtimeit -s'x=0.0' 'x=x+1'
1000000 loops, best of 3: 0.507 usec per loop

helen:~/apy alex$ python -mtimeit -s'x=0.0' 'x+=1'
1000000 loops, best of 3: 0.504 usec per loop

Basically a dead draw, so use what's clearest to you.  And learn to use
-mtimeit to satisfy most such curiosities much more effectively.


Alex


From jgardner at jonathangardner.net  Tue Feb 14 22:36:47 2006
From: jgardner at jonathangardner.net (Jonathan Gardner)
Date: 14 Feb 2006 19:36:47 -0800
Subject: Soduku
In-Reply-To: <mailman.1932.1139968309.27775.python-list@python.org>
References: <1139967167.960780.171360@o13g2000cwo.googlegroups.com>
	<mailman.1932.1139968309.27775.python-list@python.org>
Message-ID: <1139974607.265594.109370@g44g2000cwa.googlegroups.com>

27ms == 0.027s

How do you have a 16x16 grid for soduku? Are you using 16 digits? 0-F?

The one I am using has 9 digits, 9 squares of 9 cells each, or 9x9
cells.

The least efficient part of the algorithm is that part to calculate
what to put in a hole (as anyone might've guessed.) My algorithm
calculates this by using a set of possible values. Then I visit each
cell in the same row, column, and square, removing values from the set.
What's left is the possible values. If there is only one possible
value, then I've found what belongs there. The soduku puzzle I was
using for a test can be solved without making any guesses in this way.

The guy's algorithm was visiting each empty square and then trying out
numbers from 1-9. If they didn't violate the rules (by examining each
cell in the row, column, and square for each guess), then he would move
to the next empty cell and try again, until he got the solution. There
was a lot of backtracking and it would even try to find all possible
answers.



From johnjsal at NOSPAMgmail.com  Wed Feb  8 15:54:50 2006
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Wed, 08 Feb 2006 20:54:50 GMT
Subject: still a valid book?
Message-ID: <uUsGf.1584$No6.37778@news.tufts.edu>

Hi everyone. I have Learning Python 2nd edition (O'Reilly) and I noticed 
that Wrox has a newer book out (Beginning Python) that covers version 
2.4. Do you think that Learning Python is still a good enough book to be 
an intro to the language? Is there anything so different about 2.4 from 
2.3 that it will mess me up to start with LP?

Thanks,
John


From webraviteja at gmail.com  Sun Feb  5 12:18:21 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 5 Feb 2006 09:18:21 -0800
Subject: Compiling
In-Reply-To: <mailman.1434.1139149897.27775.python-list@python.org>
References: <mailman.1387.1138986082.27775.python-list@python.org>
	<1139149306.188367.193770@g47g2000cwa.googlegroups.com>
	<mailman.1434.1139149897.27775.python-list@python.org>
Message-ID: <1139159901.081493.283400@g43g2000cwa.googlegroups.com>


Fredrik Lundh wrote:
> Ravi Teja wrote:
>
> > This is a standard response to a rather frequent question here. But I
> > am not sure I ever understood. Scheme / Lisp are about as dynamic as
> > Python.
>
> if that were fully true, it would be fairly trivial to translate Python to
> scheme or lisp and compile it.

I only dabble in Lisp / Scheme. I am curious on how Python is more
dynamic.

>
> > Another standard response is "nobody felt the need or got around to
> > it". And yet a number of Lisp and Scheme compilers exist when these
> > languages have a much smaller user base. Am I missing something here?
> 
> an endless supply of grad students ?

:-).



From gaz082 at gmail.com  Tue Feb 21 11:27:20 2006
From: gaz082 at gmail.com (Gaz)
Date: 21 Feb 2006 08:27:20 -0800
Subject: No
In-Reply-To: <mailman.2245.1140537111.27775.python-list@python.org>
References: <1140534490.873612.64280@g47g2000cwa.googlegroups.com>
	<mailman.2245.1140537111.27775.python-list@python.org>
Message-ID: <1140539240.807314.283280@g43g2000cwa.googlegroups.com>

OSError: [Errno 2] No such file or directory: 'c:/'
      args = (2, 'No such file or directory')
      errno = 2
      filename = 'c:/'
      strerror = 'No such file or directory'

Crazy... and if i use c:\, i get a 500 error.



From bblais at bryant.edu  Fri Feb 17 08:30:43 2006
From: bblais at bryant.edu (Brian Blais)
Date: Fri, 17 Feb 2006 08:30:43 -0500
Subject: calculating on matrix indices
In-Reply-To: <dt3dsd$ujl$1@sea.gmane.org>
References: <43F50D7F.8010108@bryant.edu> <dt3dsd$ujl$1@sea.gmane.org>
Message-ID: <43F5D003.2090705@bryant.edu>

Robert Kern wrote:
> The traceback tells you exactly what's wrong:
> 
> In [7]: x[idx] = exp(-t[idx]/tau)
> ---------------------------------------------------------------------------
> exceptions.TypeError                                 Traceback (most recent call
> last)
> 

yes, I saw that, but all of the types (i.e. type(x)) came out to be the same, so I 
figured the problem was with the indexing, and that was causing a typecast problem. 
I didn't know about dtype

> In [13]: x = zeros(len(t), float)

well that is confusing!  zeros(5,'f') is single precision, zeros(5,'d') is double, 
and zeros(5,float) is double!  that's where I got whacked, because I remembered that 
"float" was "double" in python...but I guess, not always.


thanks for your help!



				bb
-- 
-----------------

             bblais at bryant.edu
             http://web.bryant.edu/~bblais



From kay.schluehr at gmx.net  Fri Feb 24 22:49:27 2006
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 24 Feb 2006 19:49:27 -0800
Subject: A C-like if statement
In-Reply-To: <7x3bi8xwbt.fsf@ruckus.brouhaha.com>
References: <hp-dnY20cusOnGPeRVn-rg@nmt.edu><dtl04p$5q2$1@reader2.panix.com>
	<1140809412.375118.291480@u72g2000cwu.googlegroups.com>
	<7x3bi8xwbt.fsf@ruckus.brouhaha.com>
Message-ID: <1140839367.682902.31700@u72g2000cwu.googlegroups.com>


Paul Rubin wrote:
> "Kay Schluehr" <kay.schluehr at gmx.net> writes:
> > Hmm. A statement has side-effects but it returns no value. And yes, you
> > can create a name within an expression producing a value in Python,
> > using a list/generator comprehension. The solution to Bob's problem
> > would look like this:
> >
> > if (I for I in (a.find("3"),) ) != -1:
> >      print "It's here: ", I
> > else:
> >      print "No 3's here"
>
> I think that works for list comprehensions but not generator
> comprehensions.  With generator comprehensions, the index variable's
> scope is limited to the comprehension.

Right. It becomes even more ugly yet:

if [I for I in ("1,2,3".find("3"),) ] != [-1]:
     print "It's here: ", I
else:
     print "No 3's here"

> With list comprehensions
> there's a wart in that the index variable is still around afterwards.

Definitely, but index variable survival is nothing that entered Python
with list-comps:

for k in range(2):
    print k

>>> k
1

Kay



From LittlePython at lost.com  Sun Feb 19 00:29:54 2006
From: LittlePython at lost.com (LittlePython)
Date: Sun, 19 Feb 2006 05:29:54 GMT
Subject: Seaching Active Directory via ADO
References: <g_7Jf.33401$0H1.22606@trnddc04> <FnaJf.78254$_D1.33447@trnddc03>
Message-ID: <mnTJf.2943$GQ.88@trnddc03>

With help I have been able to put together a little example. It illustrates
several different ways..


import win32com.client

c = win32com.client.Dispatch("ADODB.Connection")
c.Open("Provider=ADSDSOObject")

##Check if connected to AD
if bool(c.state): print "Connected to AD"

## This uses sql dialect with no command object
##rs,rc=c.Execute("""
##SELECT adspath, title, name
##From 'LDAP://DC=AD,DC=LOCAL'
##where objectCategory='Person' and objectClass='user' and name='*'
##""")

##This uses ADSI dialect with not command object
##rs,rc=c.Execute("""
##<LDAP://DC=AD,DC=LOCAL>;\
##(&(objectCategory=Person)(objectClass=user)(name=*));\
##name,adspath,title;\
##subtree
##""")

##Command com with properties in sql dialect
##comm = win32com.client.Dispatch("ADODB.Command")
##comm.ActiveConnection = c
##comm.Properties('Page size').value=1000
##comm.CommandText = ("""\
##SELECT adspath, title, name \
##From 'LDAP://DC=AD,DC=LOCAL' \
##where objectCategory='Person' and objectClass='user' and name='*'\
##""")
##rs,rc=comm.Execute()

##Command com with properties in ADSI dialect
##ADS_SCOPE_SUBTREE = 2
##ADS_SCOPE_ONELEVEL = 1
##ADS_SCOPE_BASE = 0
##comm = win32com.client.Dispatch("ADODB.Command")
##comm.ActiveConnection = c
##comm.Properties('Page size').value=1000
##comm.Properties('searchscope').value=ADS_SCOPE_SUBTREE
##comm.CommandText = ("""<LDAP://DC=AD,DC=LOCAL>;\
##(&(objectCategory=Person)(objectClass=user)(name=*));\
##name,adspath,title;""")
##rs,rc=comm.Execute()

##Connect using recordset object in ADSI Dialect
##rs = win32com.client.Dispatch("ADODB.recordset")
##rs.ActiveConnection = c
##rs.source = ("""<LDAP://DC=AD,DC=LOCAL>;\
##(&(objectCategory=Person)(objectClass=user)(name=*));\
##name,adspath,title;\
##subtree""")
##rs.Open()

##Connect using recordset object in sql Dialect
##rs = win32com.client.Dispatch("ADODB.recordset")
##rs.ActiveConnection = c
##rs.source = ("""\
##SELECT adspath, title, name \
##From 'LDAP://DC=AD,DC=LOCAL' \
##where objectCategory='Person' and objectClass='user' and name='*'\
##""")
##rs.Open()

##while not rs.EOF:
##    for f in rs.Fields:
##        print f.Name, f.Value
##    rs.MoveNext()

c.close
c = None






From bob.python at yahoo.com  Thu Feb 23 13:59:39 2006
From: bob.python at yahoo.com (Bob)
Date: 23 Feb 2006 10:59:39 -0800
Subject: How to move optparse from main to function?
Message-ID: <1140721179.096585.202560@g14g2000cwa.googlegroups.com>

I'm playing around with optparse and created the code below. How do I
move that to a function and what variable do I pass?

>From the documentation it seems like "options.optparse_test" would have
the value zero if its option, either "-t" or "--test", is not detected
at the command line. When I issue "print options.optparse_test" when no
command options are used, "None" is sent to the screen (IIRC)... Is a
proper check if a command line argument is not used to use the
following:

# being check
if options.optparse_test <> 1:
 print "test parameter NOT detected"
# end check

Thanks.

# begin program
#!/usr/bin/python

from optparse import OptionParser
import string

parser = OptionParser()
parser.add_option("-t", "--test", action="count", dest="optparse_test",
 help="testing optparse")

(options, args) = parser.parse_args()
print options.optparse_test
if options.optparse_test == 1:
 print "test parameter detected"
if options.optparse_test <> 1:
 print "test parameter NOT detected"
#parser.print_help()

# end program



From steve at REMOVETHIScyber.com.au  Fri Feb 17 20:36:06 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sat, 18 Feb 2006 12:36:06 +1100
Subject: commenting out blocks of code
References: <20060217231846.87613.qmail@web36708.mail.mud.yahoo.com>
	<mailman.2077.1140221554.27775.python-list@python.org>
Message-ID: <pan.2006.02.18.01.36.05.856023@REMOVETHIScyber.com.au>

On Fri, 17 Feb 2006 19:12:01 -0500, Peter Hansen wrote:

> john peter wrote:
>> is there a similar mechanism in python, other than prefixing
>> the '#' character to the start of each statement i do  not
>> want to execute (which gets old very quickly if one needs to
>> comment and uncomment several statements a couple of
>> times while "playing around with code" say during initial design)?
> 
> In addition to the approach Paul has suggested, you should also consider 
> using a better editor, as most decent editors should have some kind of 
> "block comment/uncomment" feature that prevents that operation from 
> getting old very quickly...
> 
> Scite, for example, lets me selected a block and hit Ctrl-Q to either 
> comment or uncomment the block.

I see the developers of Scite are either newbies to GUI programming, or
they operate in a world of their own. Ctrl-Q is reserved for Quit (or
Exit) in every GUI API I know of.


> (It does this by prefixing each line 
> with #~ instead of just #, which allows it to detect when a line is 
> already so commented and reverse the operation.)  

It is *easy* to detect when a line is already commented. It starts with a
#. The ~ is superfluous.

Commenting and uncommenting should be two different commands: the whole
point of nested comments is that it allows you to comment a block of text
which may already contain comments. Having one command do both commenting
and uncommenting according to the presence or absence of semantic clues in
the text is a recipe for failure ("No you stupid computer, I want to
COMMENT that block, not uncomment it!!!").

Imagine if your text editor used cntl-C for both copy and paste, somehow
guessing whether you wanted to copy selected text or paste over it
according to some subtle clue in the text itself. Wouldn't that be fun?



-- 
Steven.



From uval at rz.uni-karlsruhe.de  Mon Feb  6 14:04:35 2006
From: uval at rz.uni-karlsruhe.de (=?ISO-8859-1?Q?Sch=FCle_Daniel?=)
Date: Mon, 06 Feb 2006 20:04:35 +0100
Subject: Size of list
In-Reply-To: <1139243538.269506.214060@f14g2000cwb.googlegroups.com>
References: <1139243538.269506.214060@f14g2000cwb.googlegroups.com>
Message-ID: <ds800f$ir9$1@news2.rz.uni-karlsruhe.de>

 >>> lst = [1,2,3]
 >>> len(lst)
3
 >>> lst.__len__()
3

in genereal all objects which implements __len__
can be passed to built-in function len
 >>> len
<built-in function len>

just to give one example how this can be used

 >>> class X(object):
...     def __len__(self):
...             print "this instance has __len__"
...             return 100
...
 >>> x=X()
 >>> len(x)
this instance has __len__
100
 >>> x.__len__()
this instance has __len__
100

hth, Daniel



From roy at panix.com  Mon Feb 13 17:50:15 2006
From: roy at panix.com (Roy Smith)
Date: Mon, 13 Feb 2006 22:50:15 +0000 (UTC)
Subject: how do you pronounce 'tuple'?
References: <vuednQcT5sUEn23eRVn-iA@rcn.net>
	<mailman.1857.1139863723.27775.python-list@python.org>
	<Wj6If.1606$No6.38150@news.tufts.edu> <dsqtq7$mju$1@online.de>
Message-ID: <dsr2f7$8l9$1@reader2.panix.com>

Peter Maas  <peter.maas at somewhere.com> wrote:
>Latin             n-tuple
>---------------------------
>...               ...
>triplex           triple
>duplex            duple
>simplex           simple

Would a 9-tuple be a nipple?


From erniedude at gmail.com  Fri Feb  3 19:10:51 2006
From: erniedude at gmail.com (Ernesto)
Date: 3 Feb 2006 16:10:51 -0800
Subject: Making Popen items terminate when program ends.
Message-ID: <1139011851.330605.262740@g14g2000cwa.googlegroups.com>

I used Popen to launch a seperate telnet window, like this:

subprocess.Popen("start telnet.exe -f C:\Folder\File.txt localhost
6000",shell=True)

I is preferable to have this telnet window with the python program.  Is
there something I can do to that line of code to make that happen, or
perhaps another line I can add to the end to force this ?  Thanks



From limodou at gmail.com  Thu Feb 16 02:27:18 2006
From: limodou at gmail.com (limodou)
Date: Thu, 16 Feb 2006 15:27:18 +0800
Subject: How to run shell commands within python
In-Reply-To: <1140074469.258382.24620@f14g2000cwb.googlegroups.com>
References: <1140074469.258382.24620@f14g2000cwb.googlegroups.com>
Message-ID: <505f13c0602152327s47250543o1025115530ab471c@mail.gmail.com>

On 15 Feb 2006 23:21:09 -0800, fileexit <mayyash at gmail.com> wrote:
> How can I execute shell commands from within python.  Specifically, I
> am looking for something like the shell "cat".  But this also made me
> wonder how to execute shell commands anyway, just if i needed to do
> that in the future.
>

You can use os.system() or os.popen(), etc.


--
I like python!
My Blog: http://www.donews.net/limodou
NewEdit Maillist: http://groups.google.com/group/NewEdit


From mfranklin1 at gatwick.westerngeco.slb.com  Wed Feb 15 04:47:18 2006
From: mfranklin1 at gatwick.westerngeco.slb.com (Martin Franklin)
Date: Wed, 15 Feb 2006 09:47:18 +0000
Subject: Downloading files using urllib in a for loop?
In-Reply-To: <1139996216.765104.119260@g14g2000cwa.googlegroups.com>
References: <1139996216.765104.119260@g14g2000cwa.googlegroups.com>
Message-ID: <43F2F8A6.2060303@gatwick.westerngeco.slb.com>


justsee at gmail.com wrote:
> Hi,
>  I'm using Python 2.3 on Windows for the first time, and am doing
> something wrong in using urllib to retrieve images from urls embedded
> in a csv file. If I explicitly specify a url and image name it works
> fine(commented example in the code), but if I pass in variables in this
> for loop it throws errors:
> 
> --- The script:
> 
> import csv, urllib
> reader = csv.reader(open("source.csv"))
> for x,y,z,imagepath in reader
>   theurl = imagepath[:55]
>   theimage = imagepath[55:-8]

"No such file or directory: ''" sounds to me like you are trying
to open a file called '' (empty string)

try adding some debugging

     print theimage, imagepath



>   urllib.urlretrieve(theurl, theimage)
>   #urllib.urlretrieve("http://someurl/image.gif", "image.gif") # works!
> 
> --- The errors:
> 
> This throws the following errors:
>   File "getimages.py", line 9, in ?
>     urllib.urlretrieve(theurl,theimage)
>   File "C:\Python23\lib\urllib.py", line 83, in urlretrieve
>     return _urlopener.retrieve(url, filename, reporthook, data)
>   File "C:\Python23\lib\urllib.py", line 213, in retrieve
>     fp = self.open(url, data)
>   File "C:\Python23\lib\urllib.py", line 181, in open
>     return getattr(self, name)(url)
>   File "C:\Python23\lib\urllib.py", line 410, in open_file
>     return self.open_local_file(url)
>   File "C:\Python23\lib\urllib.py", line 420, in open_local_file
>     raise IOError(e.errno, e.strerror, e.filename)
> IOError: [Errno 2] No such file or directory: ''
> 
> ---
> 
> Would really appreciate some pointers on the right way to loop through
> and retrieve images, as I've tried various other solutions but am
> clearly missing something simple!
> 
> Thanks,
> 
> justin.
> 



From fredrik at pythonware.com  Fri Feb  3 05:14:19 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 3 Feb 2006 11:14:19 +0100
Subject: newbie - script works in PythonWin - fails from Python
References: <1138960717.927268.22640@g44g2000cwa.googlegroups.com>
Message-ID: <drvadu$7hf$1@sea.gmane.org>

marcus.tettmar at gmail.com wrote:

> I have a script that runs fine when I run it from within PythonWin but
> causes a WindowsError: Exception when I try to run it from the command
> line using python.exe.  What is PythonWin doing differently?

is that the entire traceback ?

what is the script doing when you get that error message ?

</F>





From hancock at anansispaceworks.com  Mon Feb  6 00:31:36 2006
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Sun, 5 Feb 2006 23:31:36 -0600
Subject: translating PHP to Python
In-Reply-To: <ds5lo8$db8$1@sea.gmane.org>
References: <1139164228.608430.13120@g44g2000cwa.googlegroups.com>
	<6ErFf.3267$MJ.1302@fed1read07>
	<1139167762.095956.180350@g14g2000cwa.googlegroups.com>
	<ds5lo8$db8$1@sea.gmane.org>
Message-ID: <20060205233136.34d7d416@samwise.anansi>

On Sun, 05 Feb 2006 15:04:32 -0500
Peter Hansen <peter at engcorp.com> wrote:

> Dave wrote:
> > The second point won't work, though, because by parent
> > class I mean, simply, the object that created the
> > current object, *not* the class the current class is
> > based on.
> 
> Good you clarified that, because "parent" definitely isn't
> used that way  by most other people here. 

In Zope programming, for example, "parent" invariably means
neither the superclass nor a factory for the object, but
rather the container object holding the object (like a file
in a directory). This follows the conventional language for
talking about filesystem directory trees, of course.

Just to make sure you're really confused.

But if you're converting PHP to Python, it seems likely that
you will one day encounter Zope.  My impression is that
people do things in PHP that are ordinarily split between
templates (ZPT or DTML) and Python "scripts" in Zope.

Of course, there are a dozen other ways to do
web-programming in Python, too.

Cheers,
Terry

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From raims at dot.com  Tue Feb  7 06:35:08 2006
From: raims at dot.com (Lawrence Oluyede)
Date: Tue, 07 Feb 2006 12:35:08 +0100
Subject: ftp: get list of files
References: <1139311759.603645.13790@f14g2000cwb.googlegroups.com>
Message-ID: <87r76f5rmb.fsf@voodoo.myself>

"eels" <eels at nikocity.de> writes:

> With yyy = ftp.retrlines('LIST') I get this listing at stdout, but I
> need this information at variable yyy.
> How can I resolve this problem?

As written in the doc retrlines has an optional parameter (a callback function)
called on each line retrieved, so you can do something like this:

from ftplib import FTP

def writeline(data):
    fd.write(data + "\n")

f = FTP('ftp.kernel.org')
f.login()

f.cwd('/pub/linux/kernel')
fd = open('README', 'wt')
f.retrlines('RETR README', writeline)
fd.close()
f.quit()


-- 
Lawrence - http://www.oluyede.org/blog
"Anyone can freely use whatever he wants but the light at the end
of the tunnel for most of his problems is Python"


From pydecker at gmail.com  Sat Feb 11 10:17:20 2006
From: pydecker at gmail.com (Peter Decker)
Date: Sat, 11 Feb 2006 10:17:20 -0500
Subject: Yet another GUI toolkit question...
In-Reply-To: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
References: <9eae7$43ed2ce5$4275d90a$5719@FUSE.NET>
Message-ID: <ca55a9900602110717r10813e3dg82dc5a6a414a44e2@mail.gmail.com>

On 2/10/06, Kevin Walzer <sw at wordtech-software.com> wrote:

> I'm undertaking my first semi-substantial Python GUI application after a
> long time dabbling with the language.
>
...
> So: my question is, would it be more productive for me to wrestle with
> these extensions when there doesn't seem to be much constituency for
> their use, or would it be better/faster/more efficient for me to start
> scaling the wxPython mountain?

If you're going cross-platform, then wxPython is the toolkit to use.
It looks and works correctly on all platforms.

I worked with wxPython for a couple of years, and constantly struggled
with the ugle, C++ style syntax, and then discovered Dabo. Dabo is a
full 3-tier application framework, and its UI tier wraps wxPython. So
while you're using wxPython when you use dabo.ui, you're writing
clean, Pythonic code. I found that after playing around with Dabo for
a little bit, I could write apps that worked without constantly going
to the docs to look up some obscure constant or event name. The
authors are also extremely helpful, so if write your app using Dabo,
I'm sure that you'll have tons of support.

http://dabodev.com

--

# p.d.


From apardon at forel.vub.ac.be  Wed Feb 22 03:56:39 2006
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 22 Feb 2006 08:56:39 GMT
Subject: number ranges (was Re: Matlab page on scipy wiki)
References: <e86a5fd00602131854s73191cbbu742d4434ad074908@mail.gmail.com>
	<1139945386.3346.38.camel@pc1.cole.uklinux.net>
	<43F8D881.5030804@sympatico.ca>
	<gfmdnZrrLeHK22TenZ2dnUVZ_tCdnZ2d@comcast.com>
	<43F97AA8.50005@REMOVEMEcyber.com.au>
Message-ID: <slrndvo9q7.95h.apardon@rcpc42.vub.ac.be>

Op 2006-02-20, Steven D'Aprano schreef <steve at REMOVEMEcyber.com.au>:
> John Zenger wrote:
>
>> I strongly agree that Python should promote range or xrange to syntax. I 
>> favor [0..10] rather than [0:10] because 0..10 is inherently easier to 
>> understand.
>
> "Inherently"?
>
> You mean people are born with an instinctive, unlearnt 
> understanding of ..? Or that our brains are constructed 
> in such a way that .. is easier to understand?
>
> For what it is worth, even after years of Python 
> programming, I still sometimes write this:
>
> for i in len(myList):
>      # Oops.
>
> I too prefer range() or xrange() over magic syntax, but 
> I'm not especially a lover of the range() idiom. How 
> about this? With the introduction of a single keyword, 
> we could do this:
>
> for i in 2 to 5:
>      print i,
> which would print 2 3 4 5
>
> (I'm open to arguments that it should be more Pythonic 
> and less mathematical, and halt at 4.)
>

My suggestion would be to use what we already have and
extend that.

Python has slices. We could extend slices in two steps.

a) Let slices be iterable, so we could have something
   like:

   for i in slice(2,5):
     print i,
     
which would print 2 3 4,

Now I agree this wouldn't be a big advantage over the
range and xrange function, so the next point

b) Allow slice notation in arbitrary places. So we
   could write the above as:

   for i in (2:5):
     print i,

> A second keyword "downto" would allow easy backwards 
> loops, and a third "step" will absolutely kill any 
> chance of Guido agreeing to this whatsoever.

Well with iterable slices we wouldn't need any new
keyword nor any real new syntax. Just lift the 
limitation that slice notation is only allowed when
indexing.

-- 
Antoon Pardon


From vania.smirk at gmail.com  Mon Feb 13 14:05:05 2006
From: vania.smirk at gmail.com (VSmirk)
Date: 13 Feb 2006 11:05:05 -0800
Subject: hard disk activity
In-Reply-To: <g9i1v1lbf2rhmgskmkh5f9mt73s67umckk@4ax.com>
References: <1139850420.902979.71620@o13g2000cwo.googlegroups.com>
	<g9i1v1lbf2rhmgskmkh5f9mt73s67umckk@4ax.com>
Message-ID: <1139857505.376840.37440@g43g2000cwa.googlegroups.com>

I'm working primarily on Windows XP, but my solution needs to be cross
platform.

The problem is that I need more than the fact that a file has been
modified.  I need to know what has been modified in that file.

I am needing to synchronize the file on a remote folder, and my current
solution, which simply copies the file if a date comparison or a
content comparison, becomes a bit unmanageable for very large files.
Some of the files I'm working with are hundreds of MB in size, or
larger.

So I need to skip copying a hundred MB file that has had only a few
bytes changed and instead identify which few bytes have changed and
where those changes are.  I was thinking having a module that worked
below the file system level, at the device level, might be a place to
look for a solution.



From bdesth.quelquechose at free.quelquepart.fr  Mon Feb 13 20:58:17 2006
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 14 Feb 2006 02:58:17 +0100
Subject: Pythonic gui format?
In-Reply-To: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
References: <1139858810.606052.39130@z14g2000cwz.googlegroups.com>
Message-ID: <43f11990$0$667$626a54ce@news.free.fr>

Gregory Petrosyan a ?crit :
> Buenos dias, amigos!
> I have to write  _simple_  gui library, for embedding into game. My
> first attempt was to use XML: isn't it cute to describe ui in such a
> way:
> 
> <window>
>     <title>Hello World!</title>
>     <image text="nice picture here" pos=... src=... />
>     <text opts=...>
>         (some text here)
>     </text>
>     <list>
>         <item>first element</item>
>         <item>second one...</item>
>     </list>
>     <button action=... text="Click Me!" />
> </window>
> 
> (or something similar)
> 
> But after reading "Python Is Not Java"
> http://dirtsimple.org/2004/12/python-is-not-java.html  (BTW I'm not a
> Java programmer) I realised that it is actually not cute at all :) (am
> I wrong here?)

Well, XML is a bit on the verbose side (but less than Java, which is why 
Javaers love XML), and we usually have better ways to express things in 
Python. But this doesn't mean that you shouldn't use it when appropriate.

> I am currently seeking for pythonic alternative for XML. 

A pretty obvious one is dicts and lists. What about (Q&D):

window = {
  'title' : 'Hello World!'
  'image' : {'text' :"nice picture here",
              'pos' : ...,
              'src' : .. },
  'text_opts' : """
          (some text here)
   """,
   'items' : [
	'first-element',
	'second-one',
         ...
         ]
    'button' : {
	'action': ...
         'text' :"Click Me!"
    },
}


well... It sure needs more work, but you get the idea...

> One possible
> way is to create a class for every (type of?) window, like
> 
(snip ugly code)
> 
> Isn't it ugly a bit? 

I'd even say 'ugly 16-bits' !-)

> These styles of course can be combined... But IMHO looks not very nice
> :( Maybe I shall not rely on introspection?

Why not ?

> Any suggestions, comments,
> thoughts and links are welcome.

You may want to have a look at JSON. It's 'JavaScript Object Notation' - 
but Python and javascript are close enough, so the translation process 
is a no-brainer - and it's used as a replacement for XML in most 
Pythonic AJAX implementations. One of the potential plus of JSON (vs 
more python-specific solutions) is that it's language-independant.

Else, there was a quite interesting configuration module by Vinay Sajip 
that could fit your needs:

http://www.red-dove.com/python_config.html
http://www.red-dove.com/config/

(BTW, is this module still maintained ?)


From fuzzyman at gmail.com  Fri Feb 17 06:15:46 2006
From: fuzzyman at gmail.com (Fuzzyman)
Date: 17 Feb 2006 03:15:46 -0800
Subject: Evil, evil wxPython (and a glimmer of hope)
In-Reply-To: <1140162638.200378.199010@g44g2000cwa.googlegroups.com>
References: <1140116551.116322.12680@g43g2000cwa.googlegroups.com>
	<8764ned5ib.fsf@rose.polar.local>
	<1140162638.200378.199010@g44g2000cwa.googlegroups.com>
Message-ID: <1140174946.948658.186160@g47g2000cwa.googlegroups.com>

vivainio at gmail.com wrote:
> Ben Finney wrote:
>
> > The web content is a bit sparse; fortunately the code has seen more
> > love than the web pages. Wax was the focus of a couple of Google
> > "Summer of Code" projects, and new life seems to have been gained as a
> > result.
>
> I'm glad to hear that, however, I just took a look at the mailing list:
>
> http://sourceforge.net/mailarchive/forum.php?thread_id=9696120&forum_id=44351
>
> """
> I am going to take a break from blogging and my personal
> projects.  This includes Wax.  In other words, Wax development will be
> on hold for a while.  During this time, I might still address urgent
> bugs and such, but I don't plan to add new features.
> """
>
> Things like this raise a bit of concern about the survivability of the
> project. I wouldn't mind if it was a relatively independent component
> but it *is* one that is heavily dependent on wxPython...
>

Wax is certainly currently usable and not at all unstable. It has a
small userbase, but it is used. I'm about to start a couple of projects
with it.

The code is relatively simple - so it would be easy to maintain the
parts you use if that was necessary. Certainly easier than duplicating
it yourself from scratch. :-)

Once you start using Wax, it really is simple and friendly.

All the best,


Fuzzyman
http://www.voidspace.org.uk/python/index.shtml



From ian at bygrave.me.uk  Sat Feb 11 08:45:19 2006
From: ian at bygrave.me.uk (Ian Bygrave)
Date: Sat, 11 Feb 2006 13:45:19 +0000
Subject: Shortest prime number program
References: <1139652226.869102.310180@g14g2000cwa.googlegroups.com>
	<pan.2006.02.11.12.43.23.874279@bygrave.me.uk>
	<pan.2006.02.11.13.33.58.368669@bygrave.me.uk>
Message-ID: <pan.2006.02.11.13.45.19.747260@bygrave.me.uk>

On Sat, 11 Feb 2006 13:33:58 +0000, Ian Bygrave wrote:

> Well, given a hypothetical new function 'sieve'

which should have been:

def sieve(f,l):
    if not l:
        return l
    head,tail=l[0],l[1:]
    def filter_func(x):
        return f(x,head)
    tail=filter(filter_func,tail)
    return [head]+sieve(f,tail)

> The prime generation can be reduced to:
> 
> from operator import *
> sieve(mod,range(2,99))

--Ian Bygrave



From fredrik at pythonware.com  Wed Feb  8 08:23:46 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Wed, 8 Feb 2006 14:23:46 +0100
Subject: Question about idioms for clearing a list
References: <mailman.1294.1138727665.27775.python-list@python.org><1139231464.914400.37100@g44g2000cwa.googlegroups.com><mailman.1489.1139232969.27775.python-list@python.org><ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au><mailman.1537.1139297533.27775.python-list@python.org><1139300825.858426.12680@o13g2000cwo.googlegroups.com><mailman.1546.1139320907.27775.python-list@python.org><dscdtr$ciu$1@wake.carmen.se>
	<34bb7f5b0602080456w567e85e6r@mail.gmail.com>
Message-ID: <dscrd3$cm0$1@sea.gmane.org>

Ed Singleton wrote:

> Having bricks that work in lots of places makes the language
> 'guessable'.  "I've never cleared a list before, but I've cleared
> dictionaries and I guess the same way would work here".

f = open("foo")
f.clear()

sys.stdout.clear()

os.getcwd().clear()

shelve.clear()

s = "sky"
s.clear()

</F> 





From roccomoretti at hotpop.com  Fri Feb 17 10:37:01 2006
From: roccomoretti at hotpop.com (Rocco Moretti)
Date: Fri, 17 Feb 2006 09:37:01 -0600
Subject: Python 3000 deat !? Is true division ever coming ?
In-Reply-To: <pan.2006.02.17.09.54.23.838590@REMOVETHIScyber.com.au>
References: <1139810036.943598.229030@g47g2000cwa.googlegroups.com>
	<1139928242.726349.221080@g44g2000cwa.googlegroups.com>
	<1140152142.080462.99000@g14g2000cwa.googlegroups.com>
	<pan.2006.02.17.09.54.23.838590@REMOVETHIScyber.com.au>
Message-ID: <dt4qit$984$1@news.doit.wisc.edu>

Steven D'Aprano wrote:

> Anybody using Python *should* be aware of the division issue. As soon as
> they see a division, it is their responsibility to *find out what it
> means*. That doesn't require much work: they can scroll up to the
> beginning of the module and look at the first few lines. That's not hard.

And anyone wanting strict integer division semantics,(and not needing 
pre-2.2 compatability) should be using the '//' floor division operator 
anyway.


From alex.gman at gmail.com  Wed Feb 15 14:55:45 2006
From: alex.gman at gmail.com (alex.gman at gmail.com)
Date: 15 Feb 2006 11:55:45 -0800
Subject: Xah's Edu Corner: accountability & lying thru the teeth
References: <1134780763.066592.45390@g49g2000cwa.googlegroups.com>
	<1135405908.381150.133190@o13g2000cwo.googlegroups.com>
	<1136236586.734775.212440@f14g2000cwb.googlegroups.com>
	<1137784561.589887.58380@o13g2000cwo.googlegroups.com>
	<1139909629.798938.284160@g47g2000cwa.googlegroups.com>
	<45dmspF66tepU1@individual.net>
	<r9uIf.8084$lG2.2039@news-wrt-01.rdc-nyc.rr.com>
	<n5t4v1tme5eaa5jmhfpqusd85ajfpliunh@4ax.com>
	<9vyIf.8103$lG2.7704@news-wrt-01.rdc-nyc.rr.com>
	<2dv6v1hv6914bbfc4a508pkbjf8d2csgkg@4ax.com>
	<Xns976B8C3B51B2castleamber@130.133.1.4>
Message-ID: <1140033345.056334.290780@g44g2000cwa.googlegroups.com>

John Bokma wrote:
> Al Balmer <albalmer at att.net> wrote:
>
> > have for a long time, and I can understand that it would be better if
> > everyone filtered or ignored him,
>
> The best would be if everybody instead of posting replies would complain
> to his ISP and Usenet provider. Xah is a major and offensive troll. Those
> only stop when you make their accounts go faster then they can find new
> ones. I know people who have wasted quite some money, each time more and
> more to keep on trolling. In the end, some see how much it's going to cost
> to post just another message or they end up in a cancelbot or 2, and are
> kicked off some major news servers.

According to his web site, Xah lives in a car, and probably uses some
free wi-fi, so don't waste your time. Secondly, Xah is not a troll. If
you actually look at his web site, you'll realize that he's deviant
(Xah has naked pictures of himself online, and pictures of a pregnant
prostitute he's proud of meeting - if it's not obvious enough) If you
are disturbed by Xah's messages, but are unwilling to pay for
psychiatric help for him, perhaps it's best to just ignore him?



From bonono at gmail.com  Fri Feb 24 04:50:40 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 24 Feb 2006 01:50:40 -0800
Subject: "Temporary" Variable
In-Reply-To: <pan.2006.02.24.09.42.22.818116@REMOVETHIScyber.com.au>
References: <1140665472.203495.7570@g44g2000cwa.googlegroups.com>
	<43FD6645.3020201@REMOVEMEcyber.com.au>
	<1140725159.143882.202630@j33g2000cwa.googlegroups.com>
	<pan.2006.02.23.22.19.38.642977@REMOVETHIScyber.com.au>
	<ZmsLf.21067$915.1256@southeast.rr.com>
	<pan.2006.02.24.09.42.22.818116@REMOVETHIScyber.com.au>
Message-ID: <1140774640.169997.250840@u72g2000cwu.googlegroups.com>


Steven D'Aprano wrote:
> Just out of curiosity, when do you think is the right time to begin
> teaching programmers good practice from bad? Before or after they've
> learnt bad habits?
When you have authority over the coding guideline. Naming things is not
something limited to programming and most people know the importance of
choosing the appropriate ones. If on the other hand some names have
been chosen that have actual side effect(in python program), like
builtin function names, it is appropriate to point that out, though I
don't see that case here.



From reply.in.the.newsgroup at my.address.is.invalid  Wed Feb  8 05:39:35 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Wed, 08 Feb 2006 11:39:35 +0100
Subject: Strange behavior with os call in cgi script
References: <1139171873.431432.195080@f14g2000cwb.googlegroups.com>
	<43e665f1$1@news.uni-ulm.de>
	<1139176638.972414.19590@g47g2000cwa.googlegroups.com>
	<tf0du1h7sn03joag0cpjkmtm6hgfg2ppnv@4ax.com>
	<mailman.1464.1139197674.27775.python-list@python.org>
	<kbceu1thb6r2trb5u78ml5m9omlbs15moe@4ax.com>
	<1139353981.620749.254230@z14g2000cwz.googlegroups.com>
Message-ID: <uciju1pcipqq9l02lvcjbbi4bdsqcn19bp@4ax.com>

Vinay Sajip:
>Rene Pijlman:
>> It struck me as somewhat complicated as well.

>You should look at later versions of Python - your points above about
>easier configuration have already been addressed: here's a link from
>the current (2.4) docs:
>
>http://docs.python.org/lib/minimal-example.html

Yes, that looks good. Thanks for pointing that out. So... my advice to OP
(if still alive) is:

Add logging to your program:
http://docs.python.org/lib/minimal-example.html

And log the environment:
http://www.python.org/dev/doc/newstyle/lib/os-procinfo.html

 :-)

-- 
Ren? Pijlman


From aleaxit at yahoo.com  Sun Feb  5 12:07:50 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 5 Feb 2006 09:07:50 -0800
Subject: Learning Python
References: <1139154754.099716.71300@f14g2000cwb.googlegroups.com>
	<ds588v$6s4$02$1@news.t-online.com>
	<1139156577.897100.69140@g43g2000cwa.googlegroups.com>
	<mailman.1439.1139157505.27775.python-list@python.org>
	<1139158796.288778.244000@z14g2000cwz.googlegroups.com>
Message-ID: <1haa3vv.14kwor18tfjwnN%aleaxit@yahoo.com>

Byte <eoinrogers at gmail.com> wrote:

> http://docs.python.org/tut/node6.html#SECTION006100000000000000000

I think you're confusing the tutorial's use of:

 int(raw_input(...  

which means "get a string from the user and turn it into an integer" (a
very common idiom), with your use of:

 input(raw_input(... 

which means "get a string from the user and use it as a prompt to get
any value from the user" (a very peculiar usage).

The difference between `int' and `input' is rather enormous.


Alex


From ejensen at visi.com  Sun Feb 19 14:55:24 2006
From: ejensen at visi.com (Ed Jensen)
Date: Sun, 19 Feb 2006 19:55:24 -0000
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
Message-ID: <11vhj9cgnp26qac@corp.supernews.com>

Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote:
> It's not a "scripting" language, and it's not interpreted.

http://www.python.org/doc/faq/general.html#what-is-python

"Python is an interpreted, interactive, object-oriented programming
language."


From fredrik at pythonware.com  Thu Feb  9 14:54:01 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Thu, 9 Feb 2006 20:54:01 +0100
Subject: Pulling all n-sized combinations from a list
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com><1139509392.890581.94470@g43g2000cwa.googlegroups.com><mailman.1675.1139510184.27775.python-list@python.org>
	<1139513265.440321.184530@o13g2000cwo.googlegroups.com>
Message-ID: <dsg6kr$tni$1@sea.gmane.org>

mensanator at aol.com wrote:

> Fredrik Lundh wrote:
> > mensanator at aol.com wrote:
> >
> > > > It is a C extension that does permutations & combinations and is
> > > > about 10x faster than doing it in pure python [I'm the author].
> > > > It is also the 3rd result for "python combination" and 5th for
> > > > "python permutaiton" but every month someone posts to c.l.py asking
> > > > for something similar.  Go figure.
> > >
> > > Did you ever figure that some people use Windows?
> >
> > Windows don't support C ?  that was a new one.
>
> Windows comes with a C compiler? That's news to me.

if you don't have internet, how do you manage to post to this group ?

</F>





From http  Sun Feb 12 15:12:48 2006
From: http (Paul Rubin)
Date: 12 Feb 2006 12:12:48 -0800
Subject: Downloading Large Files -- Feedback?
References: <1139773494.245577.102870@g47g2000cwa.googlegroups.com>
Message-ID: <7x3bioxrnj.fsf@ruckus.brouhaha.com>

"mwt" <michaeltaft at gmail.com> writes:
> f =  urllib.urlopen("http://www.python.org/blah/blah.zip")
> g = f.read()   # ...

> So my question is, what is a good way to go about coding this kind of
> basic feedback? Also, since my testing has only *worked* with this
> code, I'm curious if it will throw a visibile error if something goes
> wrong with the download.

One obvious type of failure is running out of memory if the file is
too large.  Python can be fairly hosed (VM thrashing etc.) by the time
that happens.  Normally you shouldn't read a potentially big file of
unknown size all in one gulp like that.  You'd instead say something
like

   while True:
      block = f.read(4096)   # read a 4k block from the file
      if len(block) == 0:
         break               # end of file
      # do something with the block

Your "do something with..." could involve updating a status display 
or something, saying how much has been read so far.


From fakeaddress at nowhere.org  Fri Feb 24 16:44:13 2006
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Fri, 24 Feb 2006 21:44:13 GMT
Subject: time.sleep(1) sometimes runs for 200 seconds under windows
In-Reply-To: <mailman.2376.1140733288.27775.python-list@python.org>
References: <dtl9ad$35h$1@sea.gmane.org> <dtlat7$80c$1@sea.gmane.org>
	<mailman.2376.1140733288.27775.python-list@python.org>
Message-ID: <N6LLf.60114$PL5.14649@newssvr11.news.prodigy.com>

Paul Probert wrote:
[...]
> Its happening roughly 4 times a day total on our 20 machines, ie about 
> once every 5 days on a given machine.

Do they all have similar anti-virus programs? Some of those can
freeze out other tasks from time to time. Just one more candidate.


-- 
--Bryan


From benji at benjiyork.com  Fri Feb 17 21:57:04 2006
From: benji at benjiyork.com (Benji York)
Date: Fri, 17 Feb 2006 21:57:04 -0500
Subject: zope 3.2 and imprt errors
In-Reply-To: <1140103828.129189.37700@o13g2000cwo.googlegroups.com>
References: <1140103828.129189.37700@o13g2000cwo.googlegroups.com>
Message-ID: <43F68D00.4030706@benjiyork.com>

zunbeltz at gmail.com wrote:
> I have the following error
> 
> Python 2.4.2 (#2, Sep 30 2005, 21:19:01)
> [GCC 4.0.2 20050808 (prerelease) (Ubuntu 4.0.1-4ubuntu8)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> 
>>>>from zope.app import container
>>>>container.interfaces
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> AttributeError: 'module' object has no attribute 'interfaces'

Try this instead:

     >>> from zope.app.container import interfaces
     >>> interfaces.IContained
     <InterfaceClass zope.app.container.interfaces.IContained>

--
Benji York


From lashkariNO at SPAMworldviz.com  Wed Feb  1 12:59:13 2006
From: lashkariNO at SPAMworldviz.com (Farshid Lashkari)
Date: Wed, 01 Feb 2006 09:59:13 -0800
Subject: calling a class method in a python module
In-Reply-To: <1138805591.636063.301830@g14g2000cwa.googlegroups.com>
References: <1138805591.636063.301830@g14g2000cwa.googlegroups.com>
Message-ID: <qF6Ef.2297$MJ.2074@fed1read07>

> Can anybody tell me how to call "f" in my C code?

Assuming you already have a handle to an instance of MyClass this should 
do the trick:

PyObject *func = PyObject_GetAttrString(MyClassInst,"f");
if(func) {
     PyObject *result = PyObject_CallObject(func,NULL);
     if(result) {
         //Do something with result
         Py_DECREF(result);
     }
     Py_DECREF(func);
}

Have a look in the "Python/C API Reference Manual" for more information.

-Farshid


From simon at brunningonline.net  Tue Feb  7 05:15:46 2006
From: simon at brunningonline.net (Simon Brunning)
Date: Tue, 7 Feb 2006 10:15:46 +0000
Subject: winguiauto
In-Reply-To: <1138647958.169038.239210@g49g2000cwa.googlegroups.com>
References: <1138647958.169038.239210@g49g2000cwa.googlegroups.com>
Message-ID: <8c7f10c60602070215u6049858ai5cfff913949d7bcc@mail.gmail.com>

On 30 Jan 2006 11:05:58 -0800, puff <rbell01824 at earthlink.net> wrote:
> There seem to be a number of winguiauto(s) available on the net.  Is
> there any 'offical' version?

Official? Hmm, dunno. ;-)

The version from my site is a bit old. I've escaped Windows now, so
I'm not doing any work on Windows automation any more, but others are
taking it forward. You might look at
<http://www.tizmoi.net/watsup/intro.html> or
<http://sourceforge.net/projects/pywinauto>.

--
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From reply.in.the.newsgroup at my.address.is.invalid  Sat Feb 18 03:04:43 2006
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Sat, 18 Feb 2006 09:04:43 +0100
Subject: Does Plone support distinct sets of users in subgroups?
References: <MPG.1e603f88182909e0989715@newsgroups.comcast.net>
Message-ID: <2nkdv1thsom9nrba6ro9sap0v31erm220f@4ax.com>

wheel:
>I'm not sure if this is the right venue for Plone questions, if not, 
>could someone ref me to a better one? 

The plone-users mailing list. Highly recommended.

>The discussion groups on the plone site are mailing lists and I'd 
>rather not subscribe quite yet.

Why not? It's free, takes 1 minute and you can unsubscribe at any time.

>Does plone support distinct sets of users? 

Yes. There's a user-group mechanism.
http://plone.org/documentation/tutorial/understanding-permissions/tutorial-all-pages

>That is, on a public website running plone, can it be configured such 
>that when a user logs in they are allowed access to a subgroup's main 
>page, 

That can be done with local roles on the sharing tab. See the link above.

>get the subgroup's newsletter as well as the main site's newsletter etc?

I'm not sure about that. I guess it depends on how you implement the
newsletter. It may require a little customization or programming.

-- 
Ren? Pijlman


From lycka at carmen.se  Wed Feb  1 07:38:25 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Wed, 01 Feb 2006 13:38:25 +0100
Subject: Python vs C for a mail server
In-Reply-To: <1138728303.669646.36940@g49g2000cwa.googlegroups.com>
References: <mailman.3994.1138546139.27774.python-list@python.org>
	<mailman.1197.1138549204.27775.python-list@python.org>
	<1138728303.669646.36940@g49g2000cwa.googlegroups.com>
Message-ID: <drqa42$8k8$1@wake.carmen.se>

Randall Parker wrote:
> Also, compile time errors get caught sooner. They get caught before
> tests even get written.

Not if you do Test Driven Tevelopment. Then you write
the tests before you compile your target code! It's
also my experience that the write test - write code
- run test cycle in TDD with Python is often faster
than the plain edit - compile cycle in C++. More
extensive tests take longer, but so does linking of
C++ code...

There is obviously not one way of development which
is optimal in all situations. I've done development
for space equipment as well as business software. In
my experience, software requirements in e.g. aerospace
industry are much more stable. The people responsible
for requirements and specifications are engineers, not
accountants, and they understand systems development.

In typical application development, I'd say that the
effort required to get a finished, reasonably reliable
product is much smaller with Python than with C++. You
might need more tests, but the effort spent on that is
easily outweighed by the time saved by coding in Python
instead of C++, Java etc.

If the requirements are very stable, there is less need
for the kind of flexibility and agility that Python
provides. One of the big advantages with the dynamic
typing in Python is that you get less tight coupling.

For instance, if you have some kind of layered approach
in e.g. C++, and a number of parameters are passed from
one layer to the next in several steps, changing the type
of one parameter will cause changes everywhere in the
communication chain. In Python on the other hand, it's
typically only in the end-points that type changes will
have an impact.

In many development projects, the appropriate requirements
aren't clear from the outset of the project. The problem
in the project is not to implement a number of well defined
protocols in an optimal way, but to provide a solution that
will support the business in an efficient way. Initially,
the problem domain experts and the software developers are
probably far away from each other in their view of the
system, and while the customer knows the business purpose
of the system, it's not at all clear how this will be achieved.

With tools and methods that are rigid and don't support a
flexible and experimental approach, discovering problems
with requirements or analysis in the middle of the project,
might lead to costly and disruptive rewrites or that the
project sticks with a clearly bad solution to avoid the
risks that a rewrite leads to in terms of cost, time and
reliability.

Sure, big requirements changes late in a software project
will hamper the development whatever tools you use, but
how much these changes costs can probably vary tenfold
depending on tools and methods. With Python and an agile
approach, a late change is usually much cheaper, so it's
not as unreasonable to make this late change that makes
the product much better.


From lycka at carmen.se  Fri Feb 10 10:29:56 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Fri, 10 Feb 2006 16:29:56 +0100
Subject: Question about idioms for clearing a list
In-Reply-To: <qYZGf.26902$Jd.11304@newssvr25.news.prodigy.net>
References: <mailman.1294.1138727665.27775.python-list@python.org>	<1139231464.914400.37100@g44g2000cwa.googlegroups.com>	<mailman.1489.1139232969.27775.python-list@python.org>	<ds83kd$98m$1@sea.gmane.org>
	<43E7F59B.9070009@REMOVEMEcyber.com.au>	<mailman.1537.1139297533.27775.python-list@python.org>	<1139300825.858426.12680@o13g2000cwo.googlegroups.com>	<mailman.1546.1139320907.27775.python-list@python.org>	<dscdtr$ciu$1@wake.carmen.se>
	<mailman.1594.1139403378.27775.python-list@python.org>
	<dsd311$qlp$1@wake.carmen.se>
	<ZatGf.28418$F_3.14242@newssvr29.news.prodigy.net>
	<dsfej3$1i6$1@wake.carmen.se>
	<cQRGf.54501$PL5.14689@newssvr11.news.prodigy.com>
	<dsho58$47k$1@wake.carmen.se>
	<qYZGf.26902$Jd.11304@newssvr25.news.prodigy.net>
Message-ID: <dsibhl$f66$1@wake.carmen.se>

Bryan Olson wrote:
> Magnus Lycka wrote:
> 
>> Bryan Olson wrote:
>>>     big_union = set()
>>>     for collection in some_iter:
>>>         big_union.update(t)
>>>         collection.clear()
>>
>> I don't understand the second one. Where did 't' come from?
> 
> Cut-and-past carelessness. Meant to update with 'collection'.

If some_iter gives you dicts, the code above will throw away
your values, and put the set of keys in big_union. Is that what
you meant to do? I suspect most people would find this somewhat
surprising. For sets and "BryanLists" it will put a set of all
the contents of those collections in big_union. I think this
just verifies my previous arguments. It's rarely meaningful to
write functions that are meaingful for all builtin collections.


From John-Whitlock at ieee.org  Thu Feb  9 11:38:57 2006
From: John-Whitlock at ieee.org (JW)
Date: 9 Feb 2006 08:38:57 -0800
Subject: random playing soundfiles according to rating.
References: <1139456949.087347.173800@o13g2000cwo.googlegroups.com>
Message-ID: <1139503137.649036.36080@g44g2000cwa.googlegroups.com>

I think of it this way: you randomly pick a entry out of a dictionary,
then roll a 100-side die to see if the pick is "good enough".  Repeat
until you find one, or give up.

import random

def rand_weighted_pick(weighted_picks):
    for i in range(100):
        name, prob = random.choice(weighted_picks)
        if prob >= random.randint(0,100): return name
    # Give up and return a random choice
    return random.choice(weighted_picks)[0]

if __name__ == "__main__":
    test_vals = [("A",50),("B",30),("C",20)]
    dist = dict()
    for name, prob in test_vals: dist[name] = 0
    for x in xrange(1000): dist[rand_weighted_pick(test_vals)] += 1
    print "Expected: A = 500, B = 300, C = 200"
    print "Actual  : A = %d, B = %d, C = %d"%(dist['A'], dist['B'],
dist['C'])



From against at spam.pl  Tue Feb 21 08:38:34 2006
From: against at spam.pl (=?ISO-8859-2?Q?Grzegorz_=A6lusarek?=)
Date: Tue, 21 Feb 2006 14:38:34 +0100
Subject: CGI and Redirect
Message-ID: <dtf50n$2n3c$1@node1.news.atman.pl>

Hi All. I need to redirect user in my CGI script,  i Try to use prin 
"Location: "+url but this is not working. Can anyone tell me what I'm 
doing wrong?
Any thanks will be apreciated
Gregor


From sybrenUSE at YOURthirdtower.com.imagination  Sat Feb 11 09:36:14 2006
From: sybrenUSE at YOURthirdtower.com.imagination (Sybren Stuvel)
Date: Sat, 11 Feb 2006 15:36:14 +0100
Subject: Netstat in python. Does it's possible?
References: <s1mHf.5180$9G6.428@tornado.fastwebnet.it>
Message-ID: <slrndurtk4.ii7.sybrenUSE@schuimige.unrealtower.org>

billie enlightened us with:
> Hi all. I don't know if Python is good for this kind of jobs but I'm
> wondering if it's possible emulate the "netstat" command in Python.

On Linux, you can read /proc for that info, iirc.

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
                                             Frank Zappa


From marcus.tettmar at gmail.com  Fri Feb  3 10:00:37 2006
From: marcus.tettmar at gmail.com (marcus.tettmar at gmail.com)
Date: 3 Feb 2006 07:00:37 -0800
Subject: newbie - script works in PythonWin - fails from Python
In-Reply-To: <pan.2006.02.03.11.04.13.213569@REMOVETHIScyber.com.au>
References: <1138960717.927268.22640@g44g2000cwa.googlegroups.com>
	<1138961665.684357.78060@g44g2000cwa.googlegroups.com>
	<1138962543.290178.77790@g47g2000cwa.googlegroups.com>
	<pan.2006.02.03.11.04.13.213569@REMOVETHIScyber.com.au>
Message-ID: <1138978837.557550.144350@f14g2000cwb.googlegroups.com>

Hi,

This is all I get:

error 250477278
Traceback (most recent call last):
  File "script1.py", line 5, in ?
    Inst = lib.Initialize(0)
WindowsError: exception code 0xeedfade

I get this when running python.exe script1.py

** When run from inside PythonWin it runs beautifully and returns with
no errors **

Regardless of what the error actually is it *works* when run from
PythonWin.  It fails only when run from the command line.  I'm trying
to find out why there is a difference.  Clearly both either run a
different interpreter or with different switches.  I was hoping someone
knows what the difference is.



From webraviteja at gmail.com  Sun Feb  5 13:01:26 2006
From: webraviteja at gmail.com (Ravi Teja)
Date: 5 Feb 2006 10:01:26 -0800
Subject: Compiling
In-Reply-To: <44mh03F2to82U2@uni-berlin.de>
References: <mailman.1387.1138986082.27775.python-list@python.org>
	<43e392d1$0$31853$626a54ce@news.free.fr>
	<mailman.1390.1138988111.27775.python-list@python.org>
	<43e3972f$0$624$626a14ce@news.free.fr>
	<1139149306.188367.193770@g47g2000cwa.googlegroups.com>
	<44mh03F2to82U2@uni-berlin.de>
Message-ID: <1139160298.019306.307920@g43g2000cwa.googlegroups.com>

Actually optimizations are not what concern me. I am pretty happy with
Pyrex/Swig etc for that. What I want is the ability to make a native
DLL/SO. A whole lot easier to integrate/embed to other languages.



From claird at lairds.us  Fri Feb 17 21:08:02 2006
From: claird at lairds.us (Cameron Laird)
Date: Sat, 18 Feb 2006 02:08:02 GMT
Subject: commenting out blocks of code
References: <20060217231846.87613.qmail@web36708.mail.mud.yahoo.com>
	<mailman.2076.1140221235.27775.python-list@python.org>
Message-ID: <pnaic3-biu.ln1@lairds.us>

In article <mailman.2076.1140221235.27775.python-list at python.org>,
Paul McNett  <p at ulmcnett.com> wrote:
			.
			.
			.
>IMO this is a missing feature in Python. However, if the block of code 
>you are wanting to comment out doesn't happen to contain any 
>triple-quotes, you can surround the code with those. For example:
>
>def myFunc(arg):
>	return arg + 2
>
>"""
>def myFunc(arg):
>	return arg + 1
>"""
>
> >>> print myFunc(2)
>4
			.
			.
			.
... and note that, even if the block *does* contain triple-quotes
of one flavor, you can use the other:

  '''This is syntactic data:  """.

  '''


From greg.steffensen at gmail.com  Fri Feb 24 22:45:46 2006
From: greg.steffensen at gmail.com (gsteff)
Date: 24 Feb 2006 19:45:46 -0800
Subject: PyGTK + Glade = weird problem
In-Reply-To: <1140838606.845184.304500@u72g2000cwu.googlegroups.com>
References: <1140831896.360625.172620@p10g2000cwp.googlegroups.com>
	<1140838606.845184.304500@u72g2000cwu.googlegroups.com>
Message-ID: <1140839146.072788.25120@j33g2000cwa.googlegroups.com>

Oops- I didn't read your question carefully enough.  That's probably
not the problem.

Greg



From jason at tishler.net  Tue Feb 21 08:37:09 2006
From: jason at tishler.net (Jason Tishler)
Date: Tue, 21 Feb 2006 08:37:09 -0500
Subject: Building python 2.4.2 on Cygwin
In-Reply-To: <BAY103-DAV260105A00AAD2FCF161F8DBFC0@phx.gbl>
References: <1140467074.739405.163440@g44g2000cwa.googlegroups.com>
	<20060220214414.GA1924@tishler.net>
	<BAY103-DAV260105A00AAD2FCF161F8DBFC0@phx.gbl>
Message-ID: <20060221133709.GB2552@tishler.net>

Steve,

On Mon, Feb 20, 2006 at 11:49:06PM -0500, Stephen Gross wrote:
> >On Mon, Feb 20, 2006 at 12:24:34PM -0800, mrstephengross wrote:
> >>Ok, I'm working on building python 2.4.2 on cygwin. I *think* it's
> >>version 3.0 or 3.1 (is there a quick way to find out what version of
> >>cygwin is running within a shell?)
> >
> >Use "uname -r".  What version are you running?
> 
> Uname tells me:
> 
> $ uname -r
> 1.5.18(0.132/4/2)

Just to be sure, what does the following indicate?

    $ cygcheck -c cygwin

Sorry, but I cannot reproduce your problem under Cygwin 1.5.18.

BTW, can you use the pre-built Python 2.4.1 that is part of the standard
Cygwin distribution?

Jason

-- 
PGP/GPG Key: http://www.tishler.net/jason/pubkey.asc or key servers
Fingerprint: 7A73 1405 7F2B E669 C19D  8784 1AFD E4CC ECF4 8EF6


From jure at codeshift.net  Thu Feb 23 18:51:48 2006
From: jure at codeshift.net (Jure Vrscaj)
Date: Fri, 24 Feb 2006 00:51:48 +0100
Subject: remote module importing (urlimport)
Message-ID: <43FE4A94.8010709@codeshift.net>

Hi,

as title implies, I wrote a simple module that allows importing modules 
or even packages via http, conceptually similar to zipimport (of which I 
learned about during the process of writing urlimport, and found it very 
useful).

The module is fresh new as it was written today, and tested only on a 
few packages (moinmoin wiki and twisted).

The motives: well, I kinda like the idea of having python modules 
available in an instant everywhere python and internet is, no pre-usage 
download required, especially when you need modules from different 
versions of python. Besides, I hope this will be a valid faculty project 
that I have to do. :)

This module is heavily based on specification and examples from PEP 302.

It can be found at: http://urlimport.codeshift.net/

Comments are welcome :)

Long live python.

regards,
Jure



From cito at online.de  Wed Feb  8 03:39:19 2006
From: cito at online.de (Christoph Zwerschke)
Date: Wed, 08 Feb 2006 09:39:19 +0100
Subject: Python 2.4.2 using msvcrt71.dll on Win and compatibility issues
In-Reply-To: <43E922D0.4080407@v.loewis.de>
References: <dsaqcf$jb5$1@online.de> <43E8F864.6050605@v.loewis.de>
	<dsb2nn$5qs$1@online.de> <43E922D0.4080407@v.loewis.de>
Message-ID: <dscann$29j$1@online.de>

Martin v. L?wis wrote:
> Christoph Zwerschke wrote:
>> I understand what you mean. But the Postgres dll provides no means to
>> fdopen a new stream.
> 
> Right. So you must do so in the pygresql module. That means you have
> to get hold of msvcrt.dll's (sic) fdopen implementation.
> 
> One way to do so would be through linking pygresql to msvcrt.dll,
> instead of linking it to msvcr71.dll.

I think this would only shift the problem. Because then I would have to 
convert the msvcr71 stream I get from Python to a msvcrt stream. Using 
fileno() (of msvcrt) to get the file descriptor will probably not work.

> The other option is to use GetProcAddress to obtain the address of
> fdopen.

That would be an option. However, I would need to know the handle of the 
PostgreSQL dll module. Is there an easy way to get it (without having to 
hard-code the explicit name of the dll)? In any way, it seems I have to 
insert a lot of platform-dependent, ugly code.

In my case, it is probably easier to simply mimic the Postgres PQprint() 
function provided by the dll in PyGreSQL. It is not such a complicated 
thing. Plus it is only called with fixed parameters, so I don't need the 
complete functionality. PQprint() is considered obsolete anyway and may 
vanish one day.

But thanks a lot for your help. Sometimes you don't know whether you're 
doing something terribly wrong or missing a very easy solution if you 
don't discuss with others.

-- Christoph


From felipe.lessa at gmail.com  Mon Feb 13 00:11:17 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Mon, 13 Feb 2006 03:11:17 -0200
Subject: ordered sets operations on lists..
In-Reply-To: <dsp38j$mef$1@sea.gmane.org>
References: <mailman.1722.1139590689.27775.python-list@python.org>
	<1139592166.993686.212000@f14g2000cwb.googlegroups.com>
	<1139599834.975607.77180@f14g2000cwb.googlegroups.com>
	<1halbdx.dd0p1l1obawfkN%aleaxit@yahoo.com>	<43ef8e5f.625119424@news.oz.net>
	<1hana3d.1bwbt4c1esela5N%aleaxit@yahoo.com>
	<43F007F9.3090103@holdenweb.com> <1139805374.7547.24.camel@kenshin>
	<dsp38j$mef$1@sea.gmane.org>
Message-ID: <1139807477.28916.7.camel@kenshin>

Em Dom, 2006-02-12 ?s 23:51 -0500, Steve Holden escreveu:
> The basic answer is that so far no developer has felt it worthwhile to 
> expend time on adding these optimizations.

I always thought these small optimizations could lead Python to be
faster overall. I remember about this every time I see CPython vs.
IronPython benchmarks (.NET and Mono do some nice optimizations at
compile and run times).

> > Also, IIRC Psyco does optimize these constant expressions. Or am I
> > wrong?
> > 
> Psyco does some very advanced things, but it does them all at run-time. 
> Unless I misunderstand (not unheard of), there are no circumstances 
> under which Psyco will improve run-time for a piece of code that is only 
> executed once.

Sorry, I think I should have been clearer. Yes, Psyco only helps at
runtime (when the function is called), but those constant folds only
practically help on parts of the code that are called many times anyway,
right?

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From steve at REMOVETHIScyber.com.au  Sat Feb 11 20:24:06 2006
From: steve at REMOVETHIScyber.com.au (Steven D'Aprano)
Date: Sun, 12 Feb 2006 12:24:06 +1100
Subject: How to check...
References: <1139660094.920792.136560@g14g2000cwa.googlegroups.com>
	<1139662113.389812.128320@g43g2000cwa.googlegroups.com>
Message-ID: <pan.2006.02.12.01.24.06.345909@REMOVETHIScyber.com.au>

On Sat, 11 Feb 2006 04:48:33 -0800, augustus.kling wrote:

> Hello,
> 
> try using regular expressions. 

"Some people, when confronted with a problem, think 'I know, I'll use
regular expressions'. Now they have two problems." -- Jamie Zawinski

The original poster asked:

"How can I  check that a string does NOT contain NON English characters?"

REs are rather overkill for something so simple, don't you think?

import string
english = string.printable  # is this what you want?
english = string.ascii_letters + string.digits  # or maybe this?
english = "abc..."  # or just manually set the characters yourself

for c in some_string:
    if c not in english:
        print "Not English!!!"
        break
else:
    print "English!"



if you want it as a function, it is even more flexible:

def all_good(s, goodchars=None):
    if goodchars is None:
        goodchars = string.printable
    for c in s:
        if c not in goodchars:
            return False
    return True



-- 
Steven.



From xavier.morel at masklinn.net  Sat Feb  4 07:01:59 2006
From: xavier.morel at masklinn.net (Xavier Morel)
Date: Sat, 04 Feb 2006 13:01:59 +0100
Subject: Python on Windows
In-Reply-To: <11u7s4oor8apa49@corp.supernews.com>
References: <mailman.1389.1138987315.27775.python-list@python.org>
	<43E3EE2F.9040508@websafe.com> <11u7s4oor8apa49@corp.supernews.com>
Message-ID: <ds24v8$tg$1@aphrodite.grec.isp.9tel.net>

Grant Edwards wrote:
> Definitely.  Nobody does single .exe file windows programs
> anymore.  A single-file installer is almost as easy.
> 
uTorrent, Process Explorer or Media Player Classic are single .exe 
windows programs.

Granted, most of them are under-150kb-works-of-arts, but MPC isn't (well 
it's a work of art, but it's well over 5Mb now), but even then, some 
people STILL do single .exe windows programs, and some of these are the 
best programs in their fields (utorrent certainly is one of the best 
Torrent programs on windows, and it clearly has the very best 
features/exe size and features/ram consumption ratios, and I haven't 
seen anything that could even remotely close on to Process Explorer, 
RegMon or FileMon)


From subPose at gmail.com  Thu Feb  2 07:24:11 2006
From: subPose at gmail.com (Jason)
Date: 2 Feb 2006 04:24:11 -0800
Subject: Builder Pattern
References: <1138495045.948821.129010@z14g2000cwz.googlegroups.com>
	<1h9w0w5.1hjl1421g4btuoN%aleax@mail.comcast.net>
	<1138535681.097562.252810@g43g2000cwa.googlegroups.com>
Message-ID: <1138883051.882700.94370@g44g2000cwa.googlegroups.com>

I have converted another example of strategy which I prefer to the 2
described earlier, here it is:

class FindMinima:
	def algorithm(self):raise NotImplementedError


class LeastSquares (FindMinima):
	def algorithm(self,line):
		return (1.1,2.2)


class NewtonsMethod (FindMinima):
	def algorithm(self,line):
		return (3.3,4.4)

class Bisection (FindMinima):
	def algorithm(self,line):
		return (5.5,6.6)

class ConjugateGradient (FindMinima):
	def algorithm(self,line):
		return (3.3,4.4)



class MinimaSolver: # context class
	strategy=''
	def __init__ (self,strategy):
		self.strategy=strategy

	def minima(self,line):
		return self.strategy.algorithm(line)

	def changeAlgorithm(self,newAlgorithm):
		self.strategy = newAlgorithm

def test():
	solver=MinimaSolver(LeastSquares())
	print solver.minima((5.5,5.5))
	solver.changeAlgorithm(Bisection())
	print solver.minima((5.5,5.5))
test()



From hinnc at yahoo.com  Sun Feb 12 14:20:42 2006
From: hinnc at yahoo.com (slogging_away)
Date: 12 Feb 2006 11:20:42 -0800
Subject: Too Many if Statements?
References: <1139330447.716190.247940@z14g2000cwz.googlegroups.com>
	<6e2iu1hdb8fvlfkcuulloiiq1khlbhret1@4ax.com>
	<1139517959.741090.28560@g14g2000cwa.googlegroups.com>
	<dshvb4$jfn$1@wake.carmen.se> <dsid2f$b99$1@sea.gmane.org>
	<mailman.1763.1139690497.27775.python-list@python.org>
Message-ID: <1139772042.592352.152190@f14g2000cwb.googlegroups.com>

Now that I know the root cause of the problem, I can write around it as
suggested by Steve Holden and Terry Reedy, (and others).  In fact, it
has helped me in a way as I am thinking not in terms of the easiest
solution, (read; the first one that comes to mind),  but more effcient
and cleaner ways to write a section of code to accomplish the same
objective. The key was identifying the root cause which was provided by
the error message seen only at the command line level and by
contibutors to this post.

Thanks again for everyone's suggestions and expertise.



From dylan.moreland at gmail.com  Tue Feb 14 03:20:26 2006
From: dylan.moreland at gmail.com (Dylan Moreland)
Date: 14 Feb 2006 00:20:26 -0800
Subject: Splitting a string
In-Reply-To: <mailman.1888.1139904681.27775.python-list@python.org>
References: <mailman.1883.1139903399.27775.python-list@python.org>
	<1139904222.678581.324720@z14g2000cwz.googlegroups.com>
	<mailman.1888.1139904681.27775.python-list@python.org>
Message-ID: <1139905226.862927.6530@f14g2000cwb.googlegroups.com>

Woops! Thanks for the correction. I was assuming greediness for some
reason.

Fredrik Lundh wrote:
> Dylan Moreland wrote:
>
> > So I would try something like:
> >
> > pat = re.compile(r" (?:AND|OR|AND NOT) ")
> > pat.split(string)
>
> footnote: this yields:
>
>     ['Smith, R.', 'White', 'Blue, T.', 'Black', 'Red', 'NOT Green']
>
> (the | operator picks the first (leftmost) alternative that results in an
> overall match.)
> 
> </F>



From martin at v.loewis.de  Sat Feb 11 19:07:06 2006
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 12 Feb 2006 01:07:06 +0100
Subject: Single-file executables
In-Reply-To: <daadb$43ee6b05$4275d90a$28181@FUSE.NET>
References: <daadb$43ee6b05$4275d90a$28181@FUSE.NET>
Message-ID: <43EE7C2A.3040102@v.loewis.de>

Kevin Walzer wrote:
> The apps I've seen created by py2exe aren't single-file at all, the
> install folder is full of files besides the main program. I'm looking
> for a solution that stuffs all libraries, scripts, and the Python
> runtime into one file.

For full control, and truly single-binary executables, I recommend
to use freeze itself. It takes a bit more work, but also gives better
results.

Regards,
Martin


From deets at nospam.web.de  Wed Feb  1 10:03:15 2006
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 01 Feb 2006 16:03:15 +0100
Subject: howto catch an Exception and still print the TraceBack?
References: <43e073bd$0$341$5fc30a8@news.tiscali.it>
Message-ID: <44c0tlF1eoddU1@uni-berlin.de>

Saizan wrote:

> In an event-driven application i'd like to keep the program alive
> regardless of any exceptions raised by the handlers, but still be able to
> debug them by reading the appropriate TraceBack from stderr. I can put
> something like:

See 

sys.exc_info()

The you can do:

try:
   ....
except: # catch all
   _, e, tb = sys.exc_info()
   print tb


Regards,

Diez





From rudy.schockaert at gmail.com  Thu Feb 23 05:56:28 2006
From: rudy.schockaert at gmail.com (Rudy Schockaert)
Date: Thu, 23 Feb 2006 11:56:28 +0100
Subject: CSV module and UNICODE
In-Reply-To: <60987dac0602230253q3154866erff6b0a4f26b50378@mail.gmail.com>
References: <60987dac0602230253q3154866erff6b0a4f26b50378@mail.gmail.com>
Message-ID: <60987dac0602230256n27876972rdf7aeb684c6139e7@mail.gmail.com>

Forgot to mention that I work on Windows XP and Windows 2003.

On 2/23/06, Rudy Schockaert <rudy.schockaert at gmail.com> wrote:
>
> I'm having problems writing unicode to a csv file.
> I use the following code:
>
> -------------------------
> import codecs
> import csv
>
> csvfile = csv.writer(codecs.open('filename.csv','w+','utf-8'))
> a = u'\xc9'
> csvfile.writerow([a,a])
> -------------------------
>
> It fails with the message: UnicodeEncodeError: 'ascii' codec can't encode
> .....
>
> Is there any way I can solve this.
>
> <PEP 305>
>
>    1.
>
>    What about Unicode? Is it sufficient to pass a file object gotten
>    from codecs.open()? For example:
>
>    csvreader = csv.reader(codecs.open("some.csv", "r", "cp1252"))
>
>    csvwriter = csv.writer(codecs.open("some.csv", "w", "utf-8"))
>
>    In the first example, text would be assumed to be encoded as cp1252.
>    Should the system be aggressive in converting to Unicode or should Unicode
>    strings only be returned if necessary?
>
>    In the second example, the file will take care of automatically
>    encoding Unicode strings as utf-8 before writing to disk.
>
>    Note: As of this writing, the csv module doesn't handle Unicode
>    data.
>
> </PEP 305>
>
> PEP 305 was last modified on Wed, 11 Aug 2004
>
> <http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/python/python/nondist/peps/pep-0305.txt>
> Has something changed in between?
>
>
> Thanks in advance,
>
> Rudy
>



--
It is not economical to go to bed early to save the candles if the result is
twins. - Chinese Proverb
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From cvanarsdall at mvista.com  Thu Feb 16 11:52:56 2006
From: cvanarsdall at mvista.com (Carl J. Van Arsdall)
Date: Thu, 16 Feb 2006 08:52:56 -0800
Subject: is socket thread safe?
In-Reply-To: <f5RIf.6595$rL5.6526@newssvr27.news.prodigy.net>
References: <1139912679.559724.131020@f14g2000cwb.googlegroups.com>	<dsvtn8$qvv$1@news.freedom2surf.net>	<mailman.1968.1140037150.27775.python-list@python.org>
	<f5RIf.6595$rL5.6526@newssvr27.news.prodigy.net>
Message-ID: <43F4ADE8.2050709@mvista.com>

Bryan Olson wrote:
> Carl J. Van Arsdall wrote:
>   
>> Steve Horsley wrote:
>>
>>     
>>> e2wugui at gmail.com wrote:
>>>  
>>>
>>>       
>>>> thread1:
>>>>     while 1:
>>>>         buf = s.read()
>>>>         process(buf)
>>>>
>>>> thread2:
>>>>     while 1:
>>>>         buf = getdata()
>>>>         s.write(buf)    
>>>>         
>>> It is safe, but watch out for this gotcha: If thread B calls s.close() 
>>> while thread A is blocked in s.read(), thread A will never return from 
>>> the read. My preferred solution is to set socket timeout to a few 
>>> seconds, and loop checking a status flag so I know when to quit.
>>>       
>
> Certainly one needs timeouts to avoid hanging should the remote
> side stop. Sockets don't have a read() method, and hanging on
> recv() doesn't seem to have anything to do with close().
>
> I didn't find any definitive doc, so I tested using Python
> sockets on Linux (Debian/Ubuntu current) and WinXP. A recv()
> started before the close() will block/return just as if
> close() were never called. The close() neither triggers recv()
> to abort, nor prevents it from receiving data and detecting
> shutdown.
>
>
>   
>> I think a better thing would be to use something like a condition object 
>> to tie the two threads together and not use any polling loops.
>>
>> i.e.  consumer goes to sleep while data buffer is empty, producer 
>> produces and signals condition object, consumer wakes up and consumes.
>>     
>
> I can infer two producer-consumer relationships from the example,
> but they don't allow a condition object; the writer's consumer and
> the reader's producer are on the remote end of the socket. The
> socket will already handle the blocking and wake-up.
>
>   
>> To take this a step further, you have a status flag that is set to 
>> something like QUIT or CONSUME and when the condition is triggered wake 
>> up, then examine the status flag to determine if the consumer should 
>> then quit, consume, or whatever else you'd want your consumer thread to do.
>>     
>
> What problem are you trying to solve? Normal socket sending, receiving,
> and shutdown discipline work fine. When the writer is done writing, it
> should call sock.shutdown(socket.SHUT_WR). When the reader gets zero
> bytes from recv(nonzero), that means the remote end has finished
> writing, so the reader may call sock.shutdown(socket.SHUT_RD).
>   
Doh! I read the word threads and got carried away not even realizing 
sockets.  Well, looks like today i'll just have to remember to drink my 
coffee

:-D

-c

-- 

Carl J. Van Arsdall
cvanarsdall at mvista.com
Build and Release
MontaVista Software



From steve at holdenweb.com  Sun Feb  5 22:47:42 2006
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 06 Feb 2006 03:47:42 +0000
Subject: Strange behavior with os call in cgi script
In-Reply-To: <tf0du1h7sn03joag0cpjkmtm6hgfg2ppnv@4ax.com>
References: <1139171873.431432.195080@f14g2000cwb.googlegroups.com>	<43e665f1$1@news.uni-ulm.de>	<1139176638.972414.19590@g47g2000cwa.googlegroups.com>
	<tf0du1h7sn03joag0cpjkmtm6hgfg2ppnv@4ax.com>
Message-ID: <ds6gst$qu8$1@sea.gmane.org>

Rene Pijlman wrote:
> sophie_newbie:
> 
>>OK, interesting, but just how dow I print he environment in the
>>program??
> 
> 
> Add logging to your program:
> http://www.python.org/doc/2.3.5/lib/module-logging.html
> 
Probably oiverkill, particularly for a beginner (is it only me that 
thinks the logging module is either way over-complicated or way 
under-documented?).

> And log the environment:
> http://www.python.org/dev/doc/newstyle/lib/os-procinfo.html
> 

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From fredrik at pythonware.com  Tue Feb 14 05:53:29 2006
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 14 Feb 2006 11:53:29 +0100
Subject: get output of cmd-line command under MS windows
References: <slrndujm8k.2uf.mac@news.calmar.ws><mailman.1598.1139411970.27775.python-list@python.org>
	<slrndv3cnc.8tt.mac@news.calmar.ws>
Message-ID: <dsscrb$pmv$1@sea.gmane.org>

"calmar" wrote:

> that was good, but on python2.4
>
> subprocess is GREAT! e.g.:
>
>     pipe = subprocess.Popen(tot, stdout=subprocess.PIPE,\
>             stderr=subprocess.PIPE, shell=False)
>     message = pipe.stdout.read()
>     error = pipe.stderr.read()

footnote: subprocess is available for Python 2.2 and later, from

    http://www.lysator.liu.se/~astrand/popen5/

</F>





From rschroev_nospam_ml at fastmail.fm  Tue Feb  7 07:35:13 2006
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Tue, 07 Feb 2006 12:35:13 GMT
Subject: Accessing Windows Serial Port
In-Reply-To: <1139307603.912911.44770@z14g2000cwz.googlegroups.com>
References: <1139253898.601680.265220@g44g2000cwa.googlegroups.com>
	<11ufe0agltktg7d@corp.supernews.com>
	<1139307603.912911.44770@z14g2000cwz.googlegroups.com>
Message-ID: <5u0Gf.241146$tq4.7320623@phobos.telenet-ops.be>

malv schreef:
> Hi All,
> Would anybody know whether PySerial would work over an usb/serial
> adapter?

If the driver for the adapter creates a virtual COM-port (i.e. it shows 
up as a serial port in Windows' device manager), it works. The software 
sees no difference between a real port and a fake one.

> (what about usb/parallel adapters?)

Never tried it, but I guess it will work too.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From tim.hochberg at ieee.org  Mon Feb 20 11:13:44 2006
From: tim.hochberg at ieee.org (Tim Hochberg)
Date: Mon, 20 Feb 2006 09:13:44 -0700
Subject: number ranges (was Re: Matlab page on scipy wiki)
In-Reply-To: <1140404461.216068.280700@g44g2000cwa.googlegroups.com>
References: <e86a5fd00602131854s73191cbbu742d4434ad074908@mail.gmail.com>	<1139945386.3346.38.camel@pc1.cole.uklinux.net>	<43F8D881.5030804@sympatico.ca>	<eV4Kf.152$XZ3.31816@news20.bellglobal.com>	<mailman.2138.1140391726.27775.python-list@python.org>
	<1140404461.216068.280700@g44g2000cwa.googlegroups.com>
Message-ID: <dtcps6$1g2$1@sea.gmane.org>

bonono at gmail.com wrote:
> Tim Hochberg wrote:
> 
>>Colin J. Williams wrote:
>>
>>
>>>>It would be good if the range and slice could be merged in some way,
>>>>although the extended slice is rather complicated - I don't understand it.
>>>>
>>>>  The semantics for an extended slicing are as follows. The primary
>>>>  must evaluate to a mapping object, and it is indexed with a key that
>>>>  is constructed from the slice list, as follows. If the slice list
>>>>  contains at least one comma, the key is a tuple containing the
>>>>  conversion of the slice items; otherwise, the conversion of the lone
>>>>  slice item is the key. The conversion of a slice item that is an
>>>>  expression is that expression. The conversion of an ellipsis slice
>>>>  item is the built-in |Ellipsis| object. The conversion of a proper
>>>>  slice is a slice object (see section section 4.2 The standard type
>>>>  hierarchy <http://www.network-theory.co.uk/docs/pylang/ref_30.html>)
>>>>  whose |start|, |stop| and |step| attributes are the values of the
>>>>  expressions given as lower bound, upper bound and stride,
>>>>  respectively, substituting |None| for missing expressions.
>>>>
>>>>[source: http://www.network-theory.co.uk/docs/pylang/ref_60.html]
>>>>
>>>>The seems to be a bit of a problem with slicing that needs sorting out.
>>>>
>>>>The syntax for a slice list appears to allow multiple slices in a list:
>>>>
>>>>  extended_slicing     ::=     primary <primaries.html#tok-primary> "["
>>>>  slice_list <slicings.html#tok-slice_list> "]"
>>>>  slice_list     ::=     slice_item <slicings.html#tok-slice_item> (","
>>>>  slice_item <slicings.html#tok-slice_item>)* [","]
>>>>
>>>>but the current interpreter reports an error:
>>>>
>>>>   >>> a= range(20)
>>>>   >>> a[slice(3, 9, 2)]
>>>>  [3, 5, 7]
>>>>   >>> a[slice(3, 9, 2), slice(5, 10)]
>>>>  Traceback (most recent call last):
>>>>    File "<interactive input>", line 1, in ?
>>>>  TypeError: list indices must be integers
>>>>   >>>
>>>>
>>Extended slicing has nothing to do with lists. All that gobbeldy gook is
>>trying to tell you is what the interpreter does with O[1:2:3, 4:5:6]
>>where O is some arbitrary object. What it does is:
>>
>>O[1:2:3, 4:5:6] == O[slice(1,2,3), slice(4,5,6)]
>>                 == O.__getitem__((slice(1,2,3), slice(4,5,6)))
>>
>>In the case of python lists, __getitem__ doesn't support multiple slice
>>arguments. However, you are free to define your own types which do
>>support multiple slices.
>>
> 
> That explains it but the current documentation in the reference manual
> doesn't(I also tried what Colin did when reading that part). And as I
> mentioned in another post, the current documentation suggests that
> extended slicing is not supported for sequence type. As it said the
> primary must be evaluated to mapping object for extended slicing.
> Though it seems it doesn't matter as all python does now is turn
> [start:stop:stride] into slice object and pass that to __getitem__, no
> matter what object it is.


I try not to read the reference manual, since it just makes my eyes 
glaze over, but I believe that the distinction between sequences and 
mappings referred to only exists for objects defined at the C level. 
Objects can define getitem two different ways: using sq_item/sq_slice or 
using mp_subscript. The former functions take integers, the latter takes 
general PyObjects. So, only the mapping version (mp_*) supports extended 
slicing.  Python class objects always have the mp_subscript defined and 
it dispatches things to __getitem__.

In the past, lists only supported start and stop arguments to slices, so 
they could get by with using the sq_ functions. Now that they support 
step arguments as well, it seems that they must define the mapping 
methods as well, although I admit I haven't checked.

You can get an idea of what sq_slice does by looking at the following 
chunk of code:


class ExtendedSlicingDemo(object):
     def __getitem__(self, key):
         return key
     def __getslice__(self, start, stop):
         return start, stop

esd = ExtendedSlicingDemo()

print esd[1:2]
print esd[1:2:3]
print esd[1:2:3, 3:4:5]
print esd[1:2:3, ..., 3:4:5]
#....


Note that __getslice__ is deprecated. I think sq_item/sq_slice is still 
around for efficiency reasons for sequences that don't support extended 
slicing as well as backwards compatibility / historical reasons.

-tim







From usenet-2004 at lithe.de  Thu Feb  9 15:37:16 2006
From: usenet-2004 at lithe.de (Jan Niklas Fingerle)
Date: 09 Feb 2006 20:37:16 GMT
Subject: super(...).__init__() vs Base.__init__(self)
References: <43eb5a9d$1_2@newspeer2.tds.net>
	<K5mdnTQ_1Ime4XbeRVn-ig@comcast.com>
Message-ID: <43eba7f7$0$507$9b4e6d93@newsread4.arcor-online.net>

Steven Bethard <steven.bethard at gmail.com> wrote:
> Personally, I'd call the lack of the super calls in threading.Thread and 
> Base bugs.  

It can't be a bug since it wasn't a bug before super was introduced and
you don't wan't to break working Python-2.x-code. 

> But __init__() is definitely a tricky case since the 
> number of arguments tends to change in the __init__() methods of classes...

ACK. And every __init__ will have to accept *any* arguments you give to
it and call super with *all* the arguments it got. This is tricky and
easily to get wrong. Super is a good tool to use, when dealing with
diamond shape inheritance. In any other case I would use the direct
calls to the base classes. In fact, i've yet to find a non-textbook-case
where I really need diamond shape inheritance. OTOH I don't mean to say
that noone else needs it either.

cu, 
  --Jan Niklas


From strombrg at dcs.nac.uci.edu  Fri Feb 17 13:44:30 2006
From: strombrg at dcs.nac.uci.edu (Dan Stromberg)
Date: Fri, 17 Feb 2006 18:44:30 GMT
Subject: Databases and python
References: <pan.2006.02.14.08.06.18.754312@dcs.nac.uci.edu>
	<gtf8v1dmu147otntn4ghm9biavq01feuhr@4ax.com>
	<pan.2006.02.17.03.22.11.928784@dcs.nac.uci.edu>
	<dscbv1tagf9mrfqkfc49bifjdc0cp05bhl@4ax.com>
Message-ID: <pan.2006.02.17.18.47.41.873008@dcs.nac.uci.edu>

On Fri, 17 Feb 2006 12:32:52 +0100, Rene Pijlman wrote:

> Dan Stromberg:
>>> My first attempt would be: a BTree with the word as key, and a 'list of
>>> filenames' as value.
>>> http://www.zope.org/Wikis/ZODB/FrontPage/guide/node6.html#SECTION000630000000000000000
>>
>>This is basically what I'm doing now, 
> 
> Right. My second attempt would be: a BTree with the word as key, and a
> BTree of filenames as value (or some other persistent container type
> that's not (un)serialized as a whole when only one element changes).

This is a fantastic mapping from the problem domain to the solution
domain, but...  I don't know how to do a btree of btrees in python...  Nor
any other database of databases.

Would ZODB let me do that?

I'm puzzled, because:

strombrg at blee:~$ python
Python 2.4.2 (#2, Sep 30 2005, 21:19:01)
[GCC 4.0.2 20050808 (prerelease) (Ubuntu 4.0.1-4ubuntu8)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> d1={}
>>> d={}
>>> d[d1] = ''
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: dict objects are unhashable
>>>

Would I have to come up with some sort of hashable dict first?



From leknarf at pacbell.net  Wed Feb  8 14:39:51 2006
From: leknarf at pacbell.net (Scott Frankel)
Date: Wed, 8 Feb 2006 11:39:51 -0800
Subject: email questions
In-Reply-To: <1139425470.28143.48.camel@dot.uniqsys.com>
References: <FDD3FDB3-EF9C-4F85-9599-37AF617DED18@pacbell.net>
	<1139420846.28143.41.camel@dot.uniqsys.com>
	<DE414F3F-31D8-45E0-B87C-68812C8A616A@pacbell.net>
	<1139425470.28143.48.camel@dot.uniqsys.com>
Message-ID: <30AA6A19-25DE-42A6-96A2-B6FB2AC623B7@pacbell.net>


Yes, I was doing something wrong:  I was connecting to the localhost  
after instantiation.  All better now.

Thanks for the tips!
Scott



On Feb 8, 2006, at 11:04 AM, Carsten Haese wrote:

>
> Then you're doing something wrong. The line
>
> s = smtplib.SMTP("mail.ispname.net") instantiates an SMTP instance and
> connects it. Are you doing s.connect() afterwards? If yes, don't do
> that, it'll try to connect to the local host, which is not an smtp
> server.
>
> If you want to separate instantiation and connection, do this:
>
> s = smtplib.SMTP()
> s.connect("mail.ispname.net")
>
> -Carsten
>
>



From simon at brunningonline.net  Thu Feb  2 05:35:07 2006
From: simon at brunningonline.net (Simon Brunning)
Date: Thu, 2 Feb 2006 10:35:07 +0000
Subject: No subject
In-Reply-To: <001d01c627ad$afc5a930$6692a543@yourrtmejesvbc>
References: <001d01c627ad$afc5a930$6692a543@yourrtmejesvbc>
Message-ID: <8c7f10c60602020235x861a571ybc879f086b3a9f9f@mail.gmail.com>

On 2/2/06, hotcountrywench <hotcountrywench at comcast.net> wrote:
>
> I just got a new computer and pyton 2.2 is on it and I have never heard of
> it What is is for.

Python is a programming language. It's (loosely speaking) an
interpreted language - that is to say, any software written in Python
needs the Python software around in order to work.

> Should I keep it on my puter???????????????

Yup. It's probably used by some of the vendor supplied tools, which
will stop working if you remove Python.

--
Cheers,
Simon B,
simon at brunningonline.net,
http://www.brunningonline.net/simon/blog/


From john_zenger at yahoo.com  Sun Feb 19 22:49:09 2006
From: john_zenger at yahoo.com (John Zenger)
Date: Sun, 19 Feb 2006 22:49:09 -0500
Subject: Format file size for printing
In-Reply-To: <1140387431.610729.48700@o13g2000cwo.googlegroups.com>
References: <1140387431.610729.48700@o13g2000cwo.googlegroups.com>
Message-ID: <wf-dneT4EcOmoWTeRVn-ug@comcast.com>

I know of no built-in way, but you could probably code this in a few 
lines using print "%.1f" and so on.

(Some of us, by the way, are in the camp that believes a kilobyte is 
1024 bytes, not 1000, so 103803 bytes for us is about 101.4 kilobytes).

abcd wrote:
> is there a built-in way of printing the size of a file nicely?
> 
> So if the file size is 103803 bytes it prints out like: 103.8K
> or
> 0.1MB 
> 
> something liek that?
> 


From davidb at mcs.st-and.ac.uk  Tue Feb 28 06:48:41 2006
From: davidb at mcs.st-and.ac.uk (David Boddie)
Date: 28 Feb 2006 03:48:41 -0800
Subject: Printing a file
References: <du1bkn$56r$00$1@news.t-online.com>
	<du1cat$p45$1@gemini.csx.cam.ac.uk>
Message-ID: <1141127321.744881.174420@i40g2000cwc.googlegroups.com>

Jeremy Sanders wrote:
> Fabian Steiner wrote:
>
> > Unfortunately I don't know how to realize this, since also some images
> > and different boxes should be printed out. As the whole application is
> > based on QT, QPrinter might be used, but I couldn't find any examples
> > how to use it.

[...]

> It's very easy to do. If you want to handle multiple pages and so on,
> there's a bit of work to do to interface to the dialog to get the
> user-selected page range, etc.

That's where QPrintDialog comes in:

  http://doc.trolltech.com/4.1/qprintdialog.html

It's also secretly available in Qt 3 via the QPrinter.setup() method:

  printer = QPrinter()
  printer.setup()
  # Now, paint onto the printer as usual.

David



From jm.suresh at gmail.com  Tue Feb 21 00:23:21 2006
From: jm.suresh at gmail.com (Suresh Jeevanandam)
Date: Tue, 21 Feb 2006 10:53:21 +0530
Subject: Multiple assignment and the expression on the right side
Message-ID: <dte84b$568$1@home.itg.ti.com>

Dear all,
	I read in "Python in a Nutshell" that when we have multiple assignments 
made on a single line, it is equivalent to have those many simple 
assignments and that the right side is evaluated once for each 
assignment. [The wordings are mine. I am not sure if this is what he 
intended].

	So, In the following code snippet I expected the values of c, d, e to 
be different. But they are not? I am missing something... What is it?
 >>> a = 12
 >>> def x(): global a; a+=1; return(a)
...
 >>> x()
13
 >>> a
13
 >>> c = d = e = x()
 >>> c
14
 >>> d
14
 >>> e
14
 >>>

Thanks.
regards,
Suresh


From onurb at xiludom.gro  Mon Feb 20 03:47:56 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Mon, 20 Feb 2006 09:47:56 +0100
Subject: Quesion about the proper use of __slots__
In-Reply-To: <1140424508.393412.79140@o13g2000cwo.googlegroups.com>
References: <1140424508.393412.79140@o13g2000cwo.googlegroups.com>
Message-ID: <43f9825e$0$4777$636a55ce@news.free.fr>

Zefria wrote:
>>>>class Fighter:

Old-style classes are deprecated, use new-style class wherever possible:

class Fighter(object):
  ....

> ...     '''Small one man craft that can only harm other fighters on
> their own.'''
> ...     def __init__(self,statsTuple=(50,5,0,(2,4),1)):
> ...             self.fuel = statsTuple[0]
> ...             self.life = statsTuple[1]
> ...             self.armor = statsTuple[2]
> ...             self.weapon = statsTuple[3]
> ...             self.bulk = statsTuple[4]
> ...             __slots__ =
> [self.fuel,self.life,self.armor,self.weapon,self.bulk]
> ...
> 
(snip)



> 
> I was reading the special methods, got to slots
> (http://docs.python.org/ref/slots.html) and decided that i should use
> this to save memory in the program because it'll have to support very
> large numbers of fighers at once.

"premature optimization is the root of all evil".

> It says that once you define slots
> then you can't add any variables not listed in slots, but from that
> example section I just did, so am I doing something wrong or did I read
> it wrong?
> 

I think it's:

class Fighter(object):
  __slots__ = ['fuel', 'life', 'armor', 'weapon', 'bulk',]
  def __init__(self, ...):
    # code here



-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From pmartin at snakecard.com  Thu Feb 23 14:43:20 2006
From: pmartin at snakecard.com (Philippe Martin)
Date: Thu, 23 Feb 2006 13:43:20 -0600
Subject: editor for Python on Linux
References: <dtai6e$23m$2@ariane.blic.net>
Message-ID: <sfoLf.410479$0l5.316407@dukeread06>

Mladen Adamovic wrote:

> Hi!
> 
> I wonder which editor or IDE you can recommend me for writing Python
> programs. I tried with jEdit but it isn't perfect.

Eclipse + pydev



From holovaty at gmail.com  Fri Feb 10 13:48:42 2006
From: holovaty at gmail.com (Adrian  Holovaty)
Date: 10 Feb 2006 10:48:42 -0800
Subject: ANN: Python interface to Microsoft Outlook Web Access
Message-ID: <1139597322.014728.235950@f14g2000cwb.googlegroups.com>

Hi all,

Because I telecommute, I'm limited to using my company's webmail
interface, Microsoft Outlook Web Access, rather than having direct POP
or IMAP access to e-mail. This isn't ideal, for several reasons:

    * Outlook Web Access has a horrendous user interface in any browser
other than Internet Explorer. (And I'm on Linux, so I can't use
Internet Explorer.) It's hard to search, the icons are unintuitive, it
encourages top-posting and doesn't have the basic benefits of a desktop
e-mail app, such as spell-checking and address auto-completion.
    * Using webmail forces me to keep a browser window/tab open to
check messages. And Outlook Web Access doesn't auto-refresh, so I have
to remember to click "Inbox" every so often to get the latest messages.
This is a huge disruption.
    * It's just simpler and more efficient to have all my e-mail in one
place.

So I figured I'd do a bit of programming to make my life easier. The
result: weboutlook, a Python library that screen-scrapes Outlook Web
Access. It can:

    * Log into a Microsoft Outlook Web Access account on a given server
with a given username and password.
    * Retrieve all e-mail IDs from the first page of your Inbox.
    * Retrieve all e-mail IDs from the first page of any folder in your
webmail (such as "Sent Items").
    * Retrieve the full, raw source of the e-mail with a given ID.
    * Delete an e-mail with a given ID (technically, move it to the
"Deleted Items" folder).

Also, I've included a Python implementation of a POP server that
provides a POP interface to the scraper. This means I can point my
desktop e-mail client at the script, my e-mail client will think it's a
normal POP server, and my e-mails will download nicely into my desktop
app, with the screen-scraper running silently behind the scenes.

I put this together in my free time, and it's been working nicely for a
week, so I'm open-sourcing it for other poor souls who've been
sentenced to use Outlook Web Access. I presented this at yesterday's
Chicago Python Users Group meeting and was surprised to see that, even
in a group of only 30 people, 5 or 6 people used Outlook Web Access
through their company. I hope somebody finds this useful.

http://www.holovaty.com/code/weboutlook/

Please send comments and improvements to holovaty at gmail.com.

Adrian

--
Adrian Holovaty
holovaty.com | djangoproject.com | chicagocrime.org



From nogradi at gmail.com  Wed Feb  1 17:40:37 2006
From: nogradi at gmail.com (Daniel Nogradi)
Date: Wed, 1 Feb 2006 23:40:37 +0100
Subject: OO conventions
Message-ID: <5f56302b0602011440o47c07c4h3e2b0e4a1338e4fa@mail.gmail.com>

I'm relatively new to object oriented programming, so get confused
about its usage once in a while. Suppose there is a class Image that
has a number of methods, rotate, open, verify, read, close, etc. Then
to use this class my natural guess would be to have something like

image = Image( )
image.read( "myfile.jpg" )
image.rotate( )
image.close( )

But now it turns out that the PIL module uses this as

image = Image.open( "myfile.jpg" )
image.verify( )
image.rotate( )
image.close( )

Perhaps the real Image class of PIL doesn't have these methods
exactly, but doesn't matter, my point is the way it works. Is it
normal that instead of first creating an instance of a class, it
starts right away with one its methods? I of course understand that
the PIL people simply made a choice that their module works this way,
period, but I'm just wondering if it wouldn't have been more "logical"
to do it along the way of my first example.

I guess it's just a matter of convention or how the programmer feels
like, but there are no conventions of this type? Which would be more
pythonic? Or I shouldn't worry and it's totally up to the developer?


From bradfordh at gmail.com  Tue Feb  7 13:40:57 2006
From: bradfordh at gmail.com (Tempo)
Date: 7 Feb 2006 10:40:57 -0800
Subject: Is Python good for web crawlers?
In-Reply-To: <mailman.1558.1139333766.27775.python-list@python.org>
References: <1139330008.270988.227170@g44g2000cwa.googlegroups.com>
	<mailman.1555.1139330693.27775.python-list@python.org>
	<1139332188.851343.20580@g14g2000cwa.googlegroups.com>
	<44s30nF38tqrU1@uni-berlin.de>
	<1139333229.770945.215990@g43g2000cwa.googlegroups.com>
	<mailman.1558.1139333766.27775.python-list@python.org>
Message-ID: <1139337657.702268.14260@o13g2000cwo.googlegroups.com>

I took your advice and got a copy of BeautifulSoup, but I am having
trouble installing the module. Any advice? I noticed that I just can't
put it into the 'lib' directory of python to install it.



From erwin+usenet at andreasen.org  Wed Feb 22 13:21:10 2006
From: erwin+usenet at andreasen.org (Erwin S. Andreasen)
Date: Wed, 22 Feb 2006 18:21:10 +0000
Subject: except clause not catching IndexError
References: <dti4d8$lmn$1@mailhub227.itcs.purdue.edu>
Message-ID: <8764n7dzl5.fsf@andreasen.org>

Derek Schuff <dschuff at purdue.edu> writes:

> I have some code like this:

[...]

>                 except IndexError: #happens if theres a partial line at the end of file
>                     print "indexerror"
>                     break
>
> However, when I run it, it seems that I'm not catching the IndexError:
> Traceback (most recent call last):
>   File "/home/dschuff/bin/speeds.py", line 202, in ?
>     if int(toks[2],16) == qaddrs[i]+0x1000 and toks[0] == "200": #producer
> write
> IndexError: list index out of range

Did you by any chance do something like:

except ValueError, IndexError:

at some point earlier in this function? That, when catching ValueError
assigns the resulting exception to IndexError (and so the following
except IndexError: wouldn't work as IndexError is no longer what you
think it is). The correct syntax for catching multiple exceptions is:

except (ValueError, IndexError), targetVariable:

You could verify this by doing a print repr(IndexError) before your
line 202, to see that it really is the IndexError builtin.



-- 
===============================================================
<erwin+usenet at andreasen.org>                        London, E14
<URL:http://www.andreasen.org/>                             <*>   
===============================================================



From steve at holdenweb.com  Wed Feb  8 18:30:11 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 08 Feb 2006 18:30:11 -0500
Subject: Ternary Operator Now?
In-Reply-To: <1139439694.312028.145280@g43g2000cwa.googlegroups.com>
References: <1139439694.312028.145280@g43g2000cwa.googlegroups.com>
Message-ID: <dsduu3$v6$1@sea.gmane.org>

Ben Wilson wrote:
> I read somewhere else that Python was getting a ternary operator (e.g.
> x = (true/false) ? y : z). I read the PEP about it and that the PEP had
> been approved this past Fall. Has this been released into the wild yet?
> 
> IIRC, the operator is like:
> 
> x = y if C : else z
> 

Currently scheduled for next (2.5) release, but not yet implemented.

There's no colon in the construct.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From xah at xahlee.org  Tue Feb  7 18:53:58 2006
From: xah at xahlee.org (Xah Lee)
Date: 7 Feb 2006 15:53:58 -0800
Subject: Xah's Edu Corner: Unix damage: color names
In-Reply-To: <1137784561.589887.58380@o13g2000cwo.googlegroups.com>
References: <1133844932.007824.26780@g43g2000cwa.googlegroups.com>
	<1134780763.066592.45390@g49g2000cwa.googlegroups.com>
	<1135405908.381150.133190@o13g2000cwo.googlegroups.com>
	<1136236586.734775.212440@f14g2000cwb.googlegroups.com>
	<1137784561.589887.58380@o13g2000cwo.googlegroups.com>
Message-ID: <1139356437.987319.59280@g14g2000cwa.googlegroups.com>

http://en.wikipedia.org/wiki/X11_color_names

excerpt:
?
In computing, on the X Window System, X11 color names are represented
in a simple text file, which maps certain strings to RGB color values.
It is shipped with every X11 installation, hence the name, and is
usually located in <X11root>/lib/rgb.txt.

It is not known who originally compiled the list. The list shows
neither a continuity in selected color values nor in color names (for
example, darkgray but lightgrey), and many color triplets have multiple
names. Despite this, graphic designers and others got used to them
making it practically impossible to introduce a more stringent and
logical alias list.
?

Fuck the unix mother fuckers.
-----
See also: Responsible Software Licensing
http://xahlee.org/UnixResource_dir/writ/responsible_license.html

  Xah
  xah at xahlee.org
? http://xahlee.org/



From john at castleamber.com  Tue Feb 14 20:04:43 2006
From: john at castleamber.com (John Bokma)
Date: 15 Feb 2006 01:04:43 GMT
Subject: Xah's Edu Corner: accountability & lying thru the teeth
References: <1133844932.007824.26780@g43g2000cwa.googlegroups.com>
	<1134780763.066592.45390@g49g2000cwa.googlegroups.com>
	<1135405908.381150.133190@o13g2000cwo.googlegroups.com>
	<1136236586.734775.212440@f14g2000cwb.googlegroups.com>
	<1137784561.589887.58380@o13g2000cwo.googlegroups.com>
	<1139909629.798938.284160@g47g2000cwa.googlegroups.com>
	<45dmspF66tepU1@individual.net>
	<r9uIf.8084$lG2.2039@news-wrt-01.rdc-nyc.rr.com>
Message-ID: <Xns976AC211E52B3castleamber@130.133.1.4>

Kenny Tilton <NOktiltonSPAM at nyc.rr.com> wrote:

> If only some of the people castigating Xah

you misspelled castrated

-- 
John                   Small Perl scripts: http://johnbokma.com/perl/
               Perl programmer available:     http://castleamber.com/
                                        I ploink googlegroups.com :-)
                        


From antonyliu2002 at yahoo.com  Mon Feb 20 21:19:07 2006
From: antonyliu2002 at yahoo.com (Anthony Liu)
Date: Mon, 20 Feb 2006 18:19:07 -0800 (PST)
Subject: Changing values of 1st column of a matrix using take(mymatrix, (0, ),
	axis=1) 
Message-ID: <20060221021907.11316.qmail@web35802.mail.mud.yahoo.com>

I am talking about the 'take' method of numarray.

See here for more info:

http://stsdas.stsci.edu/numarray/Doc/node33.html

If I initialize a matrix 'mymatrix' by zeros((3,3),
type="Float64"), I get a 3*3 matrix of all zeros.

Look:

>>> from numarray import *
>>> mymatrix = zeros((3,3), type="Float64")
>>> mymatrix
array([[ 0.,  0.,  0.],
       [ 0.,  0.,  0.],
       [ 0.,  0.,  0.]])
>>> 

I want to change the zeros of only the first column to
1's.  In other words, I want to get:

array([[ 1.,  0.,  0.],
       [ 1.,  0.,  0.],
       [ 1.,  0.,  0.]])

The 'take' method is able to take out the first
column, but I am not sure if there is a good way of
changing all values of the first column to 1's.

Of course, I know that I can achieve my goal pretty
easily with this:

for i in range(3): mymatrix[i,0] = 1.0

I am just wondering if there is an existing numarray
method that elegantly does it for me.


__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 


From lars at gustaebel.de  Fri Feb  3 04:48:54 2006
From: lars at gustaebel.de (Lars =?iso-8859-15?Q?Gust=E4bel?=)
Date: Fri, 3 Feb 2006 10:48:54 +0100
Subject: Best way to determine if a certain PID is still running
In-Reply-To: <43E2AD80.2000100@ilm.com>
References: <43E2AD80.2000100@ilm.com>
Message-ID: <20060203094854.GA13087@axis.g33x.de>

On Thu, Feb 02, 2006 at 05:10:24PM -0800, David Hirschfield wrote:
> I'm launching a process via an os.spawnvp(os.P_NOWAIT,...) call.
> So now I have the pid of the process, and I want a way to see if that 
> process is complete.
> 
> I don't want to block on os.waitpid(), I just want a quick way to see if 
> the process I started is finished. I could popen("ps -p %d" % pid) and 
> see whether it's there anymore...but since pids get reused, there's the 
> chance (however remote) that I'd get a false positive, plus I don't 
> really like the idea of calling something non-pure-python to find out.

You could try this:

import os, errno
try:
    os.kill(pid, 0)
except OSError, e:
    if e.errno == errno.ESRCH:
        # process has finished
        ...
else:
    # process exists
    ...

Unfortunately, this way cannot save you from getting false
positives with reused pids.

The IMO better way is to use the subprocess module that comes
with Python 2.4. How to replace os.spawn* calls is described
here: http://www.python.org/doc/2.4.2/lib/node244.html

-- 
Lars Gust?bel
lars at gustaebel.de

To a man with a hammer, everything looks like a nail.
(Mark Twain)


From bonono at gmail.com  Mon Feb 13 21:38:18 2006
From: bonono at gmail.com (bonono at gmail.com)
Date: 13 Feb 2006 18:38:18 -0800
Subject: Loop Backwards
In-Reply-To: <1139884285.356559.101290@z14g2000cwz.googlegroups.com>
References: <1139883877.323042.199040@o13g2000cwo.googlegroups.com>
	<1139884285.356559.101290@z14g2000cwz.googlegroups.com>
Message-ID: <1139884698.243339.73210@g47g2000cwa.googlegroups.com>


mensanator at aol.com wrote:
> Dave wrote:
> > This should be simple, but I can't get it:
> >
> > How do you loop backwards through a list?
> >
> > For example, in, say, Javascript:
> >
> > for (var i  = list.length - 1; i >=0; i--) {
> >     do_stuff()
> > }
> >
> > I mean, I could reverse the list, but I don't want to. I want it to
> > stay exactly the same, but I want to start at the end and end at the
> > beginning.
>
> Negative indexes start at the opposite end than positive indexes.
>
> >>> s = [1,2,3,4,5]
> >>> for i in range(len(s)):
> 	print s[-i-1],
>
> 5 4 3 2 1
I thought the python way is to use slice :

range(10)[::-1]



From lycka at carmen.se  Mon Feb 13 13:56:16 2006
From: lycka at carmen.se (Magnus Lycka)
Date: Mon, 13 Feb 2006 19:56:16 +0100
Subject: is there a better way?
In-Reply-To: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
References: <1139594221.696053.7360@g47g2000cwa.googlegroups.com>
Message-ID: <dsqkoh$gf5$1@wake.carmen.se>

markscala at gmail.com wrote:
> Problem:
> 
> You have a list of unknown length, such as this: list =
> [X,X,X,O,O,O,O].  You want to extract all and only the X's.  You know
> the X's are all up front and you know that the item after the last X is
> an O, or that the list ends with an X.  There are never O's between
> X's.
> 
> I have been using something like this:
> _____________________
> 
> while list[0] != O:
>     storage.append(list[0])
>     list.pop(0)
>     if len(list) == 0:
>         break
> _____________________
> 
> But this seems ugly to me, and using "while" give me the heebies.  Is
> there a better approach?

It seems few suggested solutions actually do the same thing as
your code shows. I think this does. (Untested)

try:
     ix = aList.index(O)
     storage, aList = aList[:ix], aList[ix:]
except ValueError:
     # No O's
     storage, aList = aList, []


The main advantage with my approach over yours is that
all iterations, all the looping, takes place in fast C
code, unless your list elements are Python classes that
implement __cmp__ etc. If testing 'aList[0] == O'
involves Python, things might slow down a bit...

.index() takes linear time, but it's fairly fast. As
Alex suggested, you might want to replace it with a
O(log n) solution for big lists. You might need rather
big lists for the Python based O(log n) to get faster
than the C based O(n) though. Measure.


From onurb at xiludom.gro  Fri Feb  3 12:29:28 2006
From: onurb at xiludom.gro (bruno at modulix)
Date: Fri, 03 Feb 2006 18:29:28 +0100
Subject: Python on Windows
In-Reply-To: <mailman.1389.1138987315.27775.python-list@python.org>
References: <mailman.1389.1138987315.27775.python-list@python.org>
Message-ID: <43e3930e$0$31853$626a54ce@news.free.fr>

Simon Faulkner wrote:
> I've just written my first (simple) WxPython program - yaaaay!
> 
> What would folks suggest is the easiest way to package it to run on
> other windows PCs?

I can't tell for sure since I do not use Windows, but I think Py2Exe is
what you're looking for.



-- 
bruno desthuilliers
python -c "print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in 'onurb at xiludom.gro'.split('@')])"


From pwatson at redlinepy.com  Thu Feb  9 16:48:13 2006
From: pwatson at redlinepy.com (Paul Watson)
Date: Thu, 09 Feb 2006 15:48:13 -0600
Subject: ftp: get list of files
In-Reply-To: <87r76f5rmb.fsf@voodoo.myself>
References: <1139311759.603645.13790@f14g2000cwb.googlegroups.com>
	<87r76f5rmb.fsf@voodoo.myself>
Message-ID: <451rktF4ic3qU1@individual.net>

Lawrence Oluyede wrote:
> "eels" <eels at nikocity.de> writes:
> 
> 
>>With yyy = ftp.retrlines('LIST') I get this listing at stdout, but I
>>need this information at variable yyy.
>>How can I resolve this problem?
> 
> 
> As written in the doc retrlines has an optional parameter (a callback function)
> called on each line retrieved, so you can do something like this:
> 
> from ftplib import FTP
> 
> def writeline(data):
>     fd.write(data + "\n")
> 
> f = FTP('ftp.kernel.org')
> f.login()
> 
> f.cwd('/pub/linux/kernel')
> fd = open('README', 'wt')
> f.retrlines('RETR README', writeline)
> fd.close()
> f.quit()

How about a little more portability?

def writeline(data):
     fd.write(data + os.linesep)


From http  Wed Feb  8 18:04:52 2006
From: http (Paul Rubin)
Date: 08 Feb 2006 15:04:52 -0800
Subject: Pulling all n-sized combinations from a list
References: <1139431819.946571.56710@g44g2000cwa.googlegroups.com>
	<7x7j85czje.fsf@ruckus.brouhaha.com>
	<1139436433.439927.175100@g47g2000cwa.googlegroups.com>
Message-ID: <7xr76dwiy3.fsf@ruckus.brouhaha.com>

"Swroteb" <swrittenb at gmail.com> writes:
> I'm a little bit confused about your generator suggestion.  My list is
> a set of references to instantiated objects.  I'm just unsure about how
> to iterate through every unique combination of those references.  Are
> you suggesting that I set up methods to provide the indices I'm looking
> for in the list to iterate over?

I think the natural approach is to make a generator that yields a
5-tuple for each combination, and then have your application iterate
over that generator.  Here's my version:

    def comb(x,n):
        """Generate combinations of n items from list x"""
        if n==0:
            yield []
            return
        for i in xrange(len(x)-n+1):
            for r in comb(x[i+1:], n-1):
                yield [x[i]] + r

    for c in comb([1,2,3,4,5], 3):
        print c

The output is:
    >>>
    [1, 2, 3]
    [1, 2, 4]
    [1, 2, 5]
    [1, 3, 4]
    [1, 3, 5]
    [1, 4, 5]
    [2, 3, 4]
    [2, 3, 5]
    [2, 4, 5]
    [3, 4, 5]
    >>> 


From felipe.lessa at gmail.com  Tue Feb 14 19:39:15 2006
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Tue, 14 Feb 2006 22:39:15 -0200
Subject: Newbie
In-Reply-To: <PCuIf.32401$lo3.15259@trnddc07>
References: <v3JHf.2731$lo3.2501@trnddc07>
	<43ef6433$0$25387$636a55ce@news.free.fr> <HZJHf.2737$lo3.1139@trnddc07>
	<1139806792.698674.168530@g44g2000cwa.googlegroups.com>
	<PCuIf.32401$lo3.15259@trnddc07>
Message-ID: <1139963955.22163.6.camel@kenshin>

Em Qua, 2006-02-15 ?s 00:30 +0000, LittlePython escreveu:
> I really do not wish to limit myself to MS. My bread and butter is MS but I
> am a BSD fan at heart. I wanted to learn something I can use in both.

Please start by not top-posting ;-). Also, see
http://www.mono-project.com/VisualBasic.NET_support .

-- 
"Quem excele em empregar a for?a militar subjulga os ex?rcitos dos
outros povos sem travar batalha, toma cidades fortificadas dos outros
povos sem as atacar e destr?i os estados dos outros povos sem lutas
prolongadas. Deve lutar sob o C?u com o prop?sito primordial da
'preserva??o'. Desse modo suas armas n?o se embotar?o, e os ganhos
poder?o ser preservados. Essa ? a estrat?gia para planejar ofensivas."

  -- Sun Tzu, em "A arte da guerra"



From a.schmolck at gmail.com  Mon Feb 20 12:32:56 2006
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: 20 Feb 2006 17:32:56 +0000
Subject: Python vs. Lisp -- please explain
References: <1140324074.458446.227480@z14g2000cwz.googlegroups.com>
	<Kq2dnZipbMY_nmXenZ2dnUVZ_tmdnZ2d@comcast.com>
	<43f8ba1e$0$2895$626a54ce@news.free.fr>
	<yfsmzgnp2ub.fsf@oc.ex.ac.uk>
	<mailman.2132.1140378051.27775.python-list@python.org>
	<yfs7j7roth2.fsf@oc.ex.ac.uk>
	<1140415281.679774@jetspin.drizzle.com>
Message-ID: <yfsk6bqndfb.fsf@oc.ex.ac.uk>

"Donn Cave" <donn at drizzle.com> writes:

> Quoth Alexander Schmolck <a.schmolck at gmail.com>:
> | "Fredrik Lundh" <fredrik at pythonware.com> writes:
> ...
> |> the only even remotely formal definition I've ever seen is "language with
> |> designed to script an existing application, with limited support for handling
> |> its own state". 
> |
> |> Early Tcl and JavaScript are scripting languages, Python is not.
> |
> | Right. Which shows that by this definition scripting language is not a
> | meaningful and useful concept. No one will understand you correctly when you
> | refer to "scripting language" and mean only something like the above -- and
> | unless you spend a lot of your time talking about early tcl and early
> | javascript I doubt you'd need a word for it, either.
> 
> Oddly enough, that's what I understand it to mean, too, so you can't
> strictly say "no one".

Really? If someone talked about scripting languages without further
qualifications and much context would you automatically take that to exclude
modern Javascript, modern Tcl and python, perl, ruby etc.?

Or would you just think to yourself 'Ah, probably again someone who uses
"scripting language" imprecisely or incorectly'?

In pretty much any case I can think of all somewhat prominent languages even
those that started out purely in the context of scripting one particular
application (such as arguably javascript, although that sense of scripting is
definitely again distinct from the sense "providing application customization
and extension by users") by now have ursurped other tasks and don't fall
strictly under the given definition anymore. So my impression is that since
"scripting languages" as above would only refer to a very obscure set of
programming languages, almost no one uses the term strictly in that way.

This meaning can always be expressed by "application (specific) scripting
language" -- but what would you use to refer to "perl, python, ruby et al"?

> On the other hand, I think it's obvious that a language like Python could
> be used for scripting, without having been specifically designed for it as
> described above.  


Interviewer: "Why did you create Python in the first place?"
 
Guido: "We wanted Amoeba to be as useful as Unix for our daily work, but it was
        lacking a scripting language. So I set out to design my own."

So Guido certainly designed it as a "scripting language", but since the term
is so vague, he might 


> There's an ambiguity in the phrase, out of context - I can say "Python can
> serve as a scripting language for some applications", but not "Python is a
> scripting language!", since its place in the taxonomy of languages would be
> somewhere else.

I definitely agree that scripting language is rather ambiguous.

'as


From jeff at schwabcenter.com  Wed Feb 22 15:51:15 2006
From: jeff at schwabcenter.com (Jeffrey Schwab)
Date: Wed, 22 Feb 2006 20:51:15 GMT
Subject: list assignment
In-Reply-To: <1140641275.840358.292790@o13g2000cwo.googlegroups.com>
References: <11vpi2gdcbccbf6@corp.supernews.com>
	<1140641275.840358.292790@o13g2000cwo.googlegroups.com>
Message-ID: <794Lf.17288$915.8932@southeast.rr.com>

Raymond Hettinger wrote:
>>     [spam, ham] = ['yum', 'YUM']
>>
>>I don't see how this is any different than a tuple unpacking assignment:
>>
>>     >>> a, b = 1, 2
> 
> 
> It's not different.  They are ways of writing the same thing.

TMTOWTDI, after all. :)


From grahamd at dscpl.com.au  Wed Feb 15 20:14:49 2006
From: grahamd at dscpl.com.au (grahamd at dscpl.com.au)
Date: 15 Feb 2006 17:14:49 -0800
Subject: apache mod_python problem
References: <1140042611.557816.247140@g14g2000cwa.googlegroups.com>
	<43f3b460$1@news.uni-ulm.de>
	<1140046112.527015.144420@g14g2000cwa.googlegroups.com>
Message-ID: <1140052489.456343.143050@o13g2000cwo.googlegroups.com>


Ido Yehieli wrote:
> Thank you for your response,
> but I think it's not it - that didn't make any difference.

Suggest you read:

  http://www.dscpl.com.au/articles/modpython-001.html

It contains helpful hints for getting a basic handler working
in mod_python. If you can get that working, then try something
harder.

You are also better off asking mod_python questions on the
mod_python mailing list. See www.modpython.org home page
for how to get on mailing list.

Graham



From samrobertsmith at gmail.com  Fri Feb 10 07:25:08 2006
From: samrobertsmith at gmail.com (linda.s)
Date: Fri, 10 Feb 2006 04:25:08 -0800
Subject: a second TKinter
In-Reply-To: <dsi0gv$mpu$1@sea.gmane.org>
References: <1d987df30602100253x33aece59u425dd7d61c0ffa3f@mail.gmail.com>
	<6f4025010602100256m5f390357o@mail.gmail.com>
	<1d987df30602100320t4c61673ewfa6cd0f685a24bab@mail.gmail.com>
	<dsi0gv$mpu$1@sea.gmane.org>
Message-ID: <1d987df30602100425n38faccefpaa4e6a2a3e8b568f@mail.gmail.com>

On 2/10/06, Steve Holden <steve at holdenweb.com> wrote:
> linda.s wrote:
> > On 2/10/06, Michael Foord <fuzzyman at gmail.com> wrote:
> >
> >>
> >>
> >>On 10/02/06, linda.s <samrobertsmith at gmail.com> wrote:
> >>
> >>>I found if I opened a second TKinter, Python will go out of work. But
> >>>I need two graph outputs at the same time. What to do?
> >>>Linda.
> >>>
> >>
> >>
> >>Hello linda (?),
> >>
> >>How are you opening a 'second Tkinter' ? There is no problem with having two
> >>top level windows at the same time, you can't hjave two 'mainloops' though.
> >>:-)
> >>
> >>All the best,
> >>
> >>Fuzzyman
> >
> > What does "having two top level windows" mean?
> > Can you give an example?
> > For opening a second tkinter, i mean that I run python using
> > PythonWin: if I run the code again when the first Tk is still open,
> > then the program will crash.
>
> You are actually doing well to run even *one* Tkinter-based application
> under PythonWin, since PythonWin is an MFC-based Windows application.
> There may well be conflict between the multiple windowing modules in use.
>
> Not a good idea to run GUI-based applications under an IDE that isn't
> designed to handle them. Sorry.
>
> regards
>   Steve
> --
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC                     www.holdenweb.com
> PyCon TX 2006                  www.python.org/pycon/
so run from the terminal?


From steve at holdenweb.com  Wed Feb 15 22:38:07 2006
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 15 Feb 2006 22:38:07 -0500
Subject: Is empty string cached?
In-Reply-To: <tgSIf.12036$MJ.8017@fed1read07>
References: <cUMIf.11894$MJ.4803@fed1read07>	<mailman.1981.1140057796.27775.python-list@python.org>
	<tgSIf.12036$MJ.8017@fed1read07>
Message-ID: <dt0s2r$c16$1@sea.gmane.org>

Farshid Lashkari wrote:
>>It takes far too little evidence to induce belief:
>>
>> >>> a = "hello"
>> >>> b = "h"+"ello"
>> >>> a is b
>>False
>> >>> c = "hello"
>> >>> b is a
>>False
>> >>>
> 
> 
> I don't understand the point of your last expression. Were you intending 
> this instead:
> 
>  >>> c is a
> True
> 
Yes.

> However, the following commands add to my confusion:
> 
>  >> a = 'wtf?'
>  >> b = 'wtf?'
>  >> a is b
> False
> 
> So how are string literals cached? Is there an explanation somewhere? Is 
> it some freaky voodoo, and I should just assume that a string literal 
> will always generate a new object?
> 
I really don't understand why it's so important: it's not a part of the 
language definition at all, and therefore whatever behavior you see is 
simply an artifact of the implementation you observe.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC                     www.holdenweb.com
PyCon TX 2006                  www.python.org/pycon/



From kent at kentsjohnson.com  Sat Feb 11 08:16:19 2006
From: kent at kentsjohnson.com (Kent Johnson)
Date: Sat, 11 Feb 2006 08:16:19 -0500
Subject: Jython inherit from Java class
In-Reply-To: <dsjm56$cjr$1@reader2.nmix.net>
References: <1139344211.725580.263660@g47g2000cwa.googlegroups.com>
	<43eab05b_2@newspeer2.tds.net>
	<1139594138.216488.12730@g14g2000cwa.googlegroups.com>
	<1139600759.152551.138440@g14g2000cwa.googlegroups.com>
	<43ecee24_2@newspeer2.tds.net> <dsjm56$cjr$1@reader2.nmix.net>
Message-ID: <43eddf58$1_3@newspeer2.tds.net>

Frank LaFond wrote:
> Jython 2.2 Alpha 1 supports Java 1.5

It is also buggy and IIRC has a broken jythonc which is what the OP is 
trying to use.

Kent


From bignose+hates-spam at benfinney.id.au  Tue Feb 28 20:15:13 2006
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 01 Mar 2006 12:15:13 +1100
Subject: PEP 354: Enumerations in Python
References: <87accdplbj.fsf@rose.polar.local>
	<mailman.2474.1141050152.27775.python-list@python.org>
	<877j7gxonk.fsf@rose.polar.local>
	<roy-71481E.21125127022006@reader2.panix.com>
Message-ID: <87zmkb2cf2.fsf@rose.polar.local>

Roy Smith <roy at panix.com> writes:

> A few random questions:
>
> a = enum ('foo', 'bar', 'baz')
> b = enum ('foo', 'bar', 'baz')

Two separate enumerations are created, and bound to the names 'a' and
'b'. Each one has three unique member values, distinct from any
others.

> what's the value of the following:
>
> a == b

False

(the enumeration objects are not the same, and don't contain the same
values)

> a is b

False

(the enumeration objects are not the same)

> a.foo == b.foo

False

(the comparison function returns NotImplemented when comparing values
from different enumerations. The Python interpreter [thanks Alex
Martelli :-)] will evaluate the comparison as False)

> a.foo is b.foo

False

(the members of each enumeration are created as separate values)

> len (a)

3

(enumerations are iterable)

> str (a)

Not defined in the current specification. Suggestions?

> repr (a)

Not defined in the current specification. Suggestions?

> hash (a)

-1210774164  # or some other hash value

(falls back on the 'object' hash function)

> type (a)

<type 'enum'>  # if included in the language
<class 'collections.enum'>  # if in the stdlib

> Can you make an enum from a sequence?

The current specification is for an enum constructor to accept its
member names as separate arguments, to allow for the expected common
use case::

    foo = enum('bar', 'baz', 'bucket')

> syllables = ['foo', 'bar', 'baz']
> c = enum (syllables)

Can be done with::

    c = enum(*syllables)

> You imply that it works from "An enumerated type is created from a
> sequence of arguments to the type's constructor", but I suspect
> that's not what you intended.

That's what I intended; a sequence of arguments. Is there a better way
to refer to the positional arguments collectively?

> BTW, I think this is a great proposal; enums are a badly needed part
> of the language.

Thanks. I hope we can arrive at a consensus view of how enums should
work in Python.

> There's been a number of threads recently where people called 
> regex methods with flags (i.e. re.I) when integers were expected, with 
> bizarre results.  Making the flags into an enum would solve the problem 
> while retaining backwards compatibility.

Yes, this is a prime use case for enums. I tried to cover this in the
"Motivation"::

    Other examples include error status values and states
    within a defined process.

Can anyone think of a better way to express this, without necessarily
referring to any specific set of flags or states or codes or whatever?

-- 
 \        "To be yourself in a world that is constantly trying to make |
  `\     you something else is the greatest accomplishment."  -- Ralph |
_o__)                                                    Waldo Emerson |
Ben Finney


From peter at engcorp.com  Tue Feb 21 19:03:58 2006
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 21 Feb 2006 19:03:58 -0500
Subject: interpreting the fractional portion of time.clock() vs time.time()
	measurements
In-Reply-To: <20060221231511.79988.qmail@web36707.mail.mud.yahoo.com>
References: <20060221231511.79988.qmail@web36707.mail.mud.yahoo.com>
Message-ID: <dtg9pb$372$2@sea.gmane.org>

john peter wrote:
>  
> let's say i'm taking timing measurements in Windows XP
>  
> t1 = time.clock()
> ...
> t2 = time.clock()
>  
> t3 = t2 - t1 = say, 0.018
> what is the unit of measurement for t3? is it correct to say that t3 = 
> 18 milliseconds? microseconds?
>  
> what if the timing function used for t1 and t2 was time.time()? is it 
> still correct to
> say that t3 = 18 milliseconds? i kinda know that in Windows, 
> time.clock() has
> higher resolution than time.time().  all i need is millisecond 
> resolution. which
> of these functions would be easier to translate into millisecond units 
> of measurement?

Both return seconds.  As the docs say (I believe), however, time.clock() 
is higher resolution, so you should prefer it on Windows for short 
intervals (where short is defined as well under 24 hours).

I imagine you already know how to convert seconds into milliseconds...

-Peter



From http  Fri Feb  3 06:57:35 2006
From: http (Paul Rubin)
Date: 03 Feb 2006 03:57:35 -0800
Subject: Server side newbie
References: <1138552847.103899.302880@g14g2000cwa.googlegroups.com>
	<mailman.1200.1138554129.27775.python-list@python.org>
	<1138965903.883934.324570@g44g2000cwa.googlegroups.com>
Message-ID: <7xr76k8xjk.fsf@ruckus.brouhaha.com>

jimlewis at emachineshop.com writes:
> Can you point me to sample code somewhere? If I had a server-side
> python script that increments the number in an edit control on clicking
> a button, I think I could take it from there.

Oh man, I hate to say this since it's not a good situation, but what
you're asking is a little bit more complicated than I think you're
expecting.  You need a server app with some notion of sessions (I
assume the user is supposed to be able to increment the number more
than once), so you have to know a bit about how servers and HTTP work,
plus how to write HTML, in addition to Python and some suitable server
side modules.  

Your best bet might be to use a web framework that already understands
sessions, but 1) you have to decide which one to use, since there are
several to choose from with differing sets of features; and 2) these
frameworks are designed for writing complex apps, so learning them may
be a bit much for something this simple.  But if your idea is to build
towards a real web app that does something more serious, then a
framework is the way to go.  

There's an old book about how database-backed web sites work, that
is pretty long, but well written.  It's online:
   http://philip.greenspun.com/panda


From mahs at telcopartners.com  Thu Feb  9 01:15:10 2006
From: mahs at telcopartners.com (Michael Spencer)
Date: Wed, 08 Feb 2006 22:15:10 -0800
Subject: random playing soundfiles according to rating.
In-Reply-To: <1139456949.087347.173800@o13g2000cwo.googlegroups.com>
References: <1139456949.087347.173800@o13g2000cwo.googlegroups.com>
Message-ID: <dsemjv$tp8$1@sea.gmane.org>

kp87 at lycos.com wrote:
...

> 
> But i am stuck on how to do a random chooser that works according to my
> idea of choosing according to rating system. It seems to me to be a bit
> different that just choosing a weighted choice like so:
> 
...
> 
> And i am not sure i want to have to go through what will be hundreds of
> sound files and scale their ratings by hand so that they all add up to
> 100%. I just want to have a long list that i can add too whenever i
> want, and assign it a grade/rating according to my whims!
> 
Perhaps something like this:

from bisect import bisect_left
from random import randrange

def w_choice(range, weights):
     """Return a choice from range, given *cumulative* relative frequencies"""
     total = weights[-1]
     pick = randrange(1,total)
     ix = bisect_left(weights, pick)
     return range[ix]


def cum_sum(iterable, start = 0):
     cum = []
     for i in iterable:
         start += i
         cum.append(start)
     return cum

Test it:
  >>> files = {"File1": 20, "File2": 10, "File3":70}
  >>> def test(files, N = 10000):
  ...     names = files.keys()
  ...     weights = cum_sum(files.values())
  ...
  ...     plays = {}
  ...     for i in range(N):
  ...         track = w_choice(names, weights)
  ...         plays[track] = plays.get(track, 0) + 1
  ...     return plays
  ...
  >>> test(files, N=10000)
  {'File3': 7039, 'File2': 1049, 'File1': 1912}
  >>> files["File4"] = 50
  >>> test(files, N=150000)
  {'File3': 70502, 'File2': 9988, 'File1': 20009, 'File4': 49501}
  >>>


Michael




From aleaxit at yahoo.com  Sun Feb  5 20:31:36 2006
From: aleaxit at yahoo.com (Alex Martelli)
Date: Sun, 5 Feb 2006 17:31:36 -0800
Subject: Newbie Help!
References: <43e6a1d4$0$6951$ed2619ec@ptn-nntp-reader02.plus.net>
Message-ID: <1haar54.1x8exat19f77b3N%aleaxit@yahoo.com>

Stephen <saunders2005 at plusdsl.net> wrote:

> Hi All,
>         im new to python i just have a few questions and was wondering if
> you could help me??
> 
> 1. what programming langaugue does python use? or which is most popular?

Python _is_ a programming language, so your question is not clear.  If
you're asking what languages are used to implement Python, that's C (for
the mainstream version), Java (for Jython), C# (for IronPython), and
Python itself (for PyPy).

> 2. Does anyone know where i could get hold of practice code

http://aspn.activestate.com/ASPN/Python/Cookbook/ -- but much of it may
be a bit advanced for a beginner.

> 3. Any good ebooks or links to start with. (according to the web this is the
> best place to start.)

http://wiki.python.org/moin/BeginnersGuide lists many.

> i know you probally get asked these questions all the time! but im trying to
> mirgrate for windows to linux.

Python runs on Windows, Linux, Mac (where it comes with the OS, but then
that's also true of many Linux distros), and elsewhere.


Alex


From michele.simionato at gmail.com  Tue Feb 21 11:29:01 2006
From: michele.simionato at gmail.com (Michele Simionato)
Date: 21 Feb 2006 08:29:01 -0800
Subject: Zope/Plone - Is it the right solution?
In-Reply-To: <jjemv1hcg383f0bdfrfs1s0qmotlk0dgvo@4ax.com>
References: <1140532818.195281.316580@g44g2000cwa.googlegroups.com>
	<1140537603.392927.207650@f14g2000cwb.googlegroups.com>
	<jjemv1hcg383f0bdfrfs1s0qmotlk0dgvo@4ax.com>
Message-ID: <1140539341.782246.167060@g44g2000cwa.googlegroups.com>

Rene Pijlman wrote:
> Get your data out of those silly rows and columns, and put it in
> first-class objects!

Well, there are pros and contras in the choice of a relational database
vs an object
database. Most of the time, there is no choice, since you have a legacy
relation
database to work with. Also, there are many cases where a relational DB
is the
right choice. So I would say that most of the times one has to do with
relational DBs
anyway, so it is a good investement to learn them. The ZODB is easy to
use,
but when it gives errors, it is not obvious at all to understand what
is happening.

  Michele Simionato



From deusfaber at gmail.com  Sun Feb 12 16:06:22 2006
From: deusfaber at gmail.com (dfaber)
Date: 12 Feb 2006 13:06:22 -0800
Subject: python and webcam
In-Reply-To: <mailman.1792.1139778226.27775.python-list@python.org>
References: <1139773485.698970.195320@z14g2000cwz.googlegroups.com>
	<1139777880.787466.210640@f14g2000cwb.googlegroups.com>
	<mailman.1792.1139778226.27775.python-list@python.org>
Message-ID: <1139778382.006125.200140@z14g2000cwz.googlegroups.com>

Thank you for your help. I will look around for v4l modules too.



From mitsura at skynet.be  Wed Feb  1 06:06:54 2006
From: mitsura at skynet.be (mitsura at skynet.be)
Date: 1 Feb 2006 03:06:54 -0800
Subject: wxTreeCtrl Q?
Message-ID: <1138792014.646535.213080@g44g2000cwa.googlegroups.com>

Hi,

it is possible to change the font (bold, underline, italic) in the text
used in a wxTreeCtrl?
I looked in the wxPython demo but I can't find anything.

Any help much appreciated.

Kris



From twic at urchin.earth.li  Wed Feb  1 05:37:57 2006
From: twic at urchin.earth.li (Tom Anderson)
Date: Wed, 1 Feb 2006 10:37:57 +0000
Subject: Why checksum? [was Re: Fuzzy Lookups]
In-Reply-To: <7xy80wm61h.fsf@ruckus.brouhaha.com>
References: <1138635665.956131.130630@f14g2000cwb.googlegroups.com>
	<1138670927.377396.78090@g44g2000cwa.googlegroups.com>
	<mailman.1266.1138680617.27775.python-list@python.org>
	<1138721690.283464.71570@g14g2000cwa.googlegroups.com>
	<mailman.1289.1138722708.27775.python-list@python.org>
	<pan.2006.01.31.21.28.14.333129@REMOVETHIScyber.com.au>
	<7xy80wm61h.fsf@ruckus.brouhaha.com>
Message-ID: <Pine.LNX.4.62.0602010952130.5272@urchin.earth.li>

On Tue, 31 Jan 2006, it was written:

> Steven D'Aprano <steve at REMOVETHIScyber.com.au> writes:
>
>> This isn't a criticism, it is a genuine question. Why do people compare 
>> local files with MD5 instead of doing a byte-to-byte compare?

I often wonder that!

>> Is it purely a caching thing (once you have the checksum, you don't 
>> need to read the file again)? Are there any other reasons?
>
> It's not just a matter of comparing two files.  The idea is you have 
> 10,000 local files and you want to find which ones are duplicates (i.e. 
> if files 637 and 2945 have the same contents, you want to discover 
> that).  The obvious way is make a list of hashes, and sort the list.

Obvious, perhaps, prudent, no. To make the list of hashes, you have to 
read all of every single file first, which could take a while. If your 
files are reasonably random at the beginning, you'd be better off just 
using the first N bytes of the file, since this would be just as 
effective, and cheaper to read. Looking at some random MP3s i have to 
hand, they all differ within the first 20 bytes - probably due to the ID3 
tags, so this should work for these.

Better yet, note that if two files are identical, they must have the same 
length, and that finding the length can be done very cheaply, so a quicker 
yet approach is to make a list of lengths, sort that, and look for 
duplicates; when you find one, do a byte-by-byte comparison of the files 
(probably terminating in the first block) to see if they really are the 
same.

By way of example, of the 2690 music files in my iTunes library, i have 
twelve pairs of same-sized files [1], and all of these differ within the 
first 18 bytes (mostly, within the first 9 bytes). Therefore, i could rule 
out duplication with just 22 data blocks read from disk (plus rather more 
blocks of directory information and inodes, of course). A hash-based 
approach would have had to wade through a touch over 13 GB of data before 
it could even get started.

Of course, there are situations where this is the wrong approach - if you 
have a collection of serialised sparse matrices, for example, which 
consist of identically-sized blocks of zeroes with a scattering of ones 
throughout, then lengths and prefixes will be useless, whereas hashes will 
work perfectly. However, here, we're looking at MP3s, where lengths and 
prefixes will be a win.

tom

[1] The distribution of those is a bit weird: ten pairs consist of two 
tracks from The Conet Project's 'Recordings of Shortwave Numbers 
Stations', one is a song from that and The Doors' 'Horse Latitudes', and 
one is between to Calexico songs ('The Ride (Pt II)' and 'Minas De 
Cobre'). Why on earth are eleven of the twelve pairs pairs of songs from 
the same artist? Is it really that they're pairs of songs from the same 
compressor (those tracks aren't from CD), i wonder?

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